Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
b811d2c2 | 3 | Copyright (C) 1994-2020 Free Software Foundation, Inc. |
4e5106e6 | 4 | Copyright (C) 2019-2020 Advanced Micro Devices, Inc. All rights reserved. |
c906108c SS |
5 | |
6 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
7 | Inc. with support from Florida State University (under contract | |
8 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
9 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
10 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 11 | support. |
c906108c | 12 | |
c5aa993b | 13 | This file is part of GDB. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is free software; you can redistribute it and/or modify |
16 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
17 | the Free Software Foundation; either version 3 of the License, or |
18 | (at your option) any later version. | |
c906108c | 19 | |
a9762ec7 JB |
20 | This program is distributed in the hope that it will be useful, |
21 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | GNU General Public License for more details. | |
c906108c | 24 | |
c5aa993b | 25 | You should have received a copy of the GNU General Public License |
a9762ec7 | 26 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 27 | |
21b2bd31 DE |
28 | /* FIXME: Various die-reading functions need to be more careful with |
29 | reading off the end of the section. | |
30 | E.g., load_partial_dies, read_partial_die. */ | |
31 | ||
c906108c | 32 | #include "defs.h" |
4de283e4 | 33 | #include "dwarf2read.h" |
d55e5aa6 TT |
34 | #include "dwarf-index-cache.h" |
35 | #include "dwarf-index-common.h" | |
4de283e4 TT |
36 | #include "bfd.h" |
37 | #include "elf-bfd.h" | |
38 | #include "symtab.h" | |
39 | #include "gdbtypes.h" | |
40 | #include "objfiles.h" | |
d55e5aa6 | 41 | #include "dwarf2.h" |
4de283e4 TT |
42 | #include "buildsym.h" |
43 | #include "demangle.h" | |
44 | #include "gdb-demangle.h" | |
4de283e4 TT |
45 | #include "filenames.h" /* for DOSish file names */ |
46 | #include "macrotab.h" | |
47 | #include "language.h" | |
48 | #include "complaints.h" | |
d55e5aa6 TT |
49 | #include "dwarf2expr.h" |
50 | #include "dwarf2loc.h" | |
4de283e4 TT |
51 | #include "cp-support.h" |
52 | #include "hashtab.h" | |
53 | #include "command.h" | |
d55e5aa6 | 54 | #include "gdbcmd.h" |
4de283e4 TT |
55 | #include "block.h" |
56 | #include "addrmap.h" | |
57 | #include "typeprint.h" | |
58 | #include "psympriv.h" | |
4de283e4 | 59 | #include "c-lang.h" |
d55e5aa6 | 60 | #include "go-lang.h" |
4de283e4 TT |
61 | #include "valprint.h" |
62 | #include "gdbcore.h" /* for gnutarget */ | |
63 | #include "gdb/gdb-index.h" | |
4de283e4 TT |
64 | #include "gdb_bfd.h" |
65 | #include "f-lang.h" | |
66 | #include "source.h" | |
4de283e4 | 67 | #include "build-id.h" |
d55e5aa6 | 68 | #include "namespace.h" |
268a13a5 TT |
69 | #include "gdbsupport/function-view.h" |
70 | #include "gdbsupport/gdb_optional.h" | |
71 | #include "gdbsupport/underlying.h" | |
268a13a5 | 72 | #include "gdbsupport/hash_enum.h" |
4de283e4 | 73 | #include "filename-seen-cache.h" |
b32b108a | 74 | #include "producer.h" |
4de283e4 | 75 | #include <fcntl.h> |
4de283e4 | 76 | #include <algorithm> |
4de283e4 | 77 | #include <unordered_map> |
268a13a5 | 78 | #include "gdbsupport/selftest.h" |
c9317f21 | 79 | #include "rust-lang.h" |
268a13a5 | 80 | #include "gdbsupport/pathstuff.h" |
437afbb8 | 81 | |
73be47f5 DE |
82 | /* When == 1, print basic high level tracing messages. |
83 | When > 1, be more verbose. | |
b4f54984 DE |
84 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
85 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 86 | |
d97bc12b | 87 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 88 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 89 | |
27e0867f DE |
90 | /* When non-zero, dump line number entries as they are read in. */ |
91 | static unsigned int dwarf_line_debug = 0; | |
92 | ||
491144b5 CB |
93 | /* When true, cross-check physname against demangler. */ |
94 | static bool check_physname = false; | |
900e11f9 | 95 | |
491144b5 CB |
96 | /* When true, do not reject deprecated .gdb_index sections. */ |
97 | static bool use_deprecated_index_sections = false; | |
481860b3 | 98 | |
5bfd760d | 99 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
6502dd73 | 100 | |
f1e6e072 TT |
101 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
102 | ||
103 | static int dwarf2_locexpr_index; | |
104 | static int dwarf2_loclist_index; | |
105 | static int dwarf2_locexpr_block_index; | |
106 | static int dwarf2_loclist_block_index; | |
107 | ||
3f563c84 PA |
108 | /* An index into a (C++) symbol name component in a symbol name as |
109 | recorded in the mapped_index's symbol table. For each C++ symbol | |
110 | in the symbol table, we record one entry for the start of each | |
111 | component in the symbol in a table of name components, and then | |
112 | sort the table, in order to be able to binary search symbol names, | |
113 | ignoring leading namespaces, both completion and regular look up. | |
114 | For example, for symbol "A::B::C", we'll have an entry that points | |
115 | to "A::B::C", another that points to "B::C", and another for "C". | |
116 | Note that function symbols in GDB index have no parameter | |
117 | information, just the function/method names. You can convert a | |
118 | name_component to a "const char *" using the | |
119 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
120 | ||
121 | struct name_component | |
122 | { | |
123 | /* Offset in the symbol name where the component starts. Stored as | |
124 | a (32-bit) offset instead of a pointer to save memory and improve | |
125 | locality on 64-bit architectures. */ | |
126 | offset_type name_offset; | |
127 | ||
128 | /* The symbol's index in the symbol and constant pool tables of a | |
129 | mapped_index. */ | |
130 | offset_type idx; | |
131 | }; | |
132 | ||
44ed8f3e PA |
133 | /* Base class containing bits shared by both .gdb_index and |
134 | .debug_name indexes. */ | |
135 | ||
136 | struct mapped_index_base | |
137 | { | |
22ca247e TT |
138 | mapped_index_base () = default; |
139 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
140 | ||
44ed8f3e PA |
141 | /* The name_component table (a sorted vector). See name_component's |
142 | description above. */ | |
143 | std::vector<name_component> name_components; | |
144 | ||
145 | /* How NAME_COMPONENTS is sorted. */ | |
146 | enum case_sensitivity name_components_casing; | |
147 | ||
148 | /* Return the number of names in the symbol table. */ | |
149 | virtual size_t symbol_name_count () const = 0; | |
150 | ||
151 | /* Get the name of the symbol at IDX in the symbol table. */ | |
152 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
153 | ||
154 | /* Return whether the name at IDX in the symbol table should be | |
155 | ignored. */ | |
156 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
157 | { | |
158 | return false; | |
159 | } | |
160 | ||
161 | /* Build the symbol name component sorted vector, if we haven't | |
162 | yet. */ | |
163 | void build_name_components (); | |
164 | ||
165 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
166 | possible matches for LN_NO_PARAMS in the name component | |
167 | vector. */ | |
168 | std::pair<std::vector<name_component>::const_iterator, | |
169 | std::vector<name_component>::const_iterator> | |
3b00ef10 TT |
170 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
171 | enum language lang) const; | |
44ed8f3e PA |
172 | |
173 | /* Prevent deleting/destroying via a base class pointer. */ | |
174 | protected: | |
175 | ~mapped_index_base() = default; | |
176 | }; | |
177 | ||
9291a0cd TT |
178 | /* A description of the mapped index. The file format is described in |
179 | a comment by the code that writes the index. */ | |
fc898b42 | 180 | struct mapped_index final : public mapped_index_base |
9291a0cd | 181 | { |
f00a2de2 PA |
182 | /* A slot/bucket in the symbol table hash. */ |
183 | struct symbol_table_slot | |
184 | { | |
185 | const offset_type name; | |
186 | const offset_type vec; | |
187 | }; | |
188 | ||
559a7a62 | 189 | /* Index data format version. */ |
3063847f | 190 | int version = 0; |
559a7a62 | 191 | |
f00a2de2 PA |
192 | /* The address table data. */ |
193 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 194 | |
3876f04e | 195 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 196 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 197 | |
9291a0cd | 198 | /* A pointer to the constant pool. */ |
3063847f | 199 | const char *constant_pool = nullptr; |
3f563c84 | 200 | |
44ed8f3e PA |
201 | bool symbol_name_slot_invalid (offset_type idx) const override |
202 | { | |
203 | const auto &bucket = this->symbol_table[idx]; | |
9ab08412 | 204 | return bucket.name == 0 && bucket.vec == 0; |
44ed8f3e | 205 | } |
5c58de74 | 206 | |
3f563c84 PA |
207 | /* Convenience method to get at the name of the symbol at IDX in the |
208 | symbol table. */ | |
44ed8f3e | 209 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 210 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 211 | |
44ed8f3e PA |
212 | size_t symbol_name_count () const override |
213 | { return this->symbol_table.size (); } | |
9291a0cd TT |
214 | }; |
215 | ||
927aa2e7 JK |
216 | /* A description of the mapped .debug_names. |
217 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 218 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 219 | { |
ed2dc618 SM |
220 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
221 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
222 | {} | |
223 | ||
224 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
225 | bfd_endian dwarf5_byte_order; |
226 | bool dwarf5_is_dwarf64; | |
227 | bool augmentation_is_gdb; | |
228 | uint8_t offset_size; | |
229 | uint32_t cu_count = 0; | |
230 | uint32_t tu_count, bucket_count, name_count; | |
231 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
232 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
233 | const gdb_byte *name_table_string_offs_reordered; | |
234 | const gdb_byte *name_table_entry_offs_reordered; | |
235 | const gdb_byte *entry_pool; | |
236 | ||
237 | struct index_val | |
238 | { | |
239 | ULONGEST dwarf_tag; | |
240 | struct attr | |
241 | { | |
242 | /* Attribute name DW_IDX_*. */ | |
243 | ULONGEST dw_idx; | |
244 | ||
245 | /* Attribute form DW_FORM_*. */ | |
246 | ULONGEST form; | |
247 | ||
248 | /* Value if FORM is DW_FORM_implicit_const. */ | |
249 | LONGEST implicit_const; | |
250 | }; | |
251 | std::vector<attr> attr_vec; | |
252 | }; | |
253 | ||
254 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
255 | ||
256 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
257 | |
258 | /* Implementation of the mapped_index_base virtual interface, for | |
259 | the name_components cache. */ | |
260 | ||
261 | const char *symbol_name_at (offset_type idx) const override | |
262 | { return namei_to_name (idx); } | |
263 | ||
264 | size_t symbol_name_count () const override | |
265 | { return this->name_count; } | |
927aa2e7 JK |
266 | }; |
267 | ||
cd4fb1b2 | 268 | /* See dwarf2read.h. */ |
ed2dc618 | 269 | |
cd4fb1b2 | 270 | dwarf2_per_objfile * |
ed2dc618 SM |
271 | get_dwarf2_per_objfile (struct objfile *objfile) |
272 | { | |
5bfd760d | 273 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 274 | } |
c906108c | 275 | |
251d32d9 | 276 | /* Default names of the debugging sections. */ |
c906108c | 277 | |
233a11ab CS |
278 | /* Note that if the debugging section has been compressed, it might |
279 | have a name like .zdebug_info. */ | |
280 | ||
9cdd5dbd DE |
281 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
282 | { | |
251d32d9 TG |
283 | { ".debug_info", ".zdebug_info" }, |
284 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
285 | { ".debug_line", ".zdebug_line" }, | |
286 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 287 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 288 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 289 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 290 | { ".debug_str", ".zdebug_str" }, |
43988095 | 291 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 292 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 293 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 294 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 295 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
296 | { ".debug_frame", ".zdebug_frame" }, |
297 | { ".eh_frame", NULL }, | |
24d3216f | 298 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
299 | { ".debug_names", ".zdebug_names" }, |
300 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 301 | 23 |
251d32d9 | 302 | }; |
c906108c | 303 | |
80626a55 | 304 | /* List of DWO/DWP sections. */ |
3019eac3 | 305 | |
80626a55 | 306 | static const struct dwop_section_names |
3019eac3 DE |
307 | { |
308 | struct dwarf2_section_names abbrev_dwo; | |
309 | struct dwarf2_section_names info_dwo; | |
310 | struct dwarf2_section_names line_dwo; | |
311 | struct dwarf2_section_names loc_dwo; | |
43988095 | 312 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
313 | struct dwarf2_section_names macinfo_dwo; |
314 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
315 | struct dwarf2_section_names str_dwo; |
316 | struct dwarf2_section_names str_offsets_dwo; | |
317 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
318 | struct dwarf2_section_names cu_index; |
319 | struct dwarf2_section_names tu_index; | |
3019eac3 | 320 | } |
80626a55 | 321 | dwop_section_names = |
3019eac3 DE |
322 | { |
323 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
324 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
325 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
326 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 327 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
328 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
329 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
330 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
331 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
332 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
333 | { ".debug_cu_index", ".zdebug_cu_index" }, |
334 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
335 | }; |
336 | ||
c906108c SS |
337 | /* local data types */ |
338 | ||
107d2387 AC |
339 | /* The data in a compilation unit header, after target2host |
340 | translation, looks like this. */ | |
c906108c | 341 | struct comp_unit_head |
a738430d | 342 | { |
c764a876 | 343 | unsigned int length; |
a738430d | 344 | short version; |
a738430d MK |
345 | unsigned char addr_size; |
346 | unsigned char signed_addr_p; | |
9c541725 | 347 | sect_offset abbrev_sect_off; |
57349743 | 348 | |
a738430d MK |
349 | /* Size of file offsets; either 4 or 8. */ |
350 | unsigned int offset_size; | |
57349743 | 351 | |
a738430d MK |
352 | /* Size of the length field; either 4 or 12. */ |
353 | unsigned int initial_length_size; | |
57349743 | 354 | |
43988095 JK |
355 | enum dwarf_unit_type unit_type; |
356 | ||
a738430d MK |
357 | /* Offset to the first byte of this compilation unit header in the |
358 | .debug_info section, for resolving relative reference dies. */ | |
9c541725 | 359 | sect_offset sect_off; |
57349743 | 360 | |
d00adf39 DE |
361 | /* Offset to first die in this cu from the start of the cu. |
362 | This will be the first byte following the compilation unit header. */ | |
9c541725 | 363 | cu_offset first_die_cu_offset; |
43988095 | 364 | |
a084a2a6 AT |
365 | |
366 | /* 64-bit signature of this unit. For type units, it denotes the signature of | |
367 | the type (DW_UT_type in DWARF 4, additionally DW_UT_split_type in DWARF 5). | |
368 | Also used in DWARF 5, to denote the dwo id when the unit type is | |
369 | DW_UT_skeleton or DW_UT_split_compile. */ | |
43988095 JK |
370 | ULONGEST signature; |
371 | ||
372 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
9c541725 | 373 | cu_offset type_cu_offset_in_tu; |
a738430d | 374 | }; |
c906108c | 375 | |
3da10d80 KS |
376 | /* Type used for delaying computation of method physnames. |
377 | See comments for compute_delayed_physnames. */ | |
378 | struct delayed_method_info | |
379 | { | |
380 | /* The type to which the method is attached, i.e., its parent class. */ | |
381 | struct type *type; | |
382 | ||
383 | /* The index of the method in the type's function fieldlists. */ | |
384 | int fnfield_index; | |
385 | ||
386 | /* The index of the method in the fieldlist. */ | |
387 | int index; | |
388 | ||
389 | /* The name of the DIE. */ | |
390 | const char *name; | |
391 | ||
392 | /* The DIE associated with this method. */ | |
393 | struct die_info *die; | |
394 | }; | |
395 | ||
e7c27a73 DJ |
396 | /* Internal state when decoding a particular compilation unit. */ |
397 | struct dwarf2_cu | |
398 | { | |
fcd3b13d SM |
399 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
400 | ~dwarf2_cu (); | |
401 | ||
402 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
403 | ||
c24bdb02 KS |
404 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
405 | Create the set of symtabs used by this TU, or if this TU is sharing | |
406 | symtabs with another TU and the symtabs have already been created | |
407 | then restore those symtabs in the line header. | |
408 | We don't need the pc/line-number mapping for type units. */ | |
409 | void setup_type_unit_groups (struct die_info *die); | |
410 | ||
411 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the | |
412 | buildsym_compunit constructor. */ | |
413 | struct compunit_symtab *start_symtab (const char *name, | |
414 | const char *comp_dir, | |
415 | CORE_ADDR low_pc); | |
416 | ||
417 | /* Reset the builder. */ | |
418 | void reset_builder () { m_builder.reset (); } | |
419 | ||
d00adf39 | 420 | /* The header of the compilation unit. */ |
fcd3b13d | 421 | struct comp_unit_head header {}; |
e142c38c | 422 | |
d00adf39 | 423 | /* Base address of this compilation unit. */ |
fcd3b13d | 424 | CORE_ADDR base_address = 0; |
d00adf39 DE |
425 | |
426 | /* Non-zero if base_address has been set. */ | |
fcd3b13d | 427 | int base_known = 0; |
d00adf39 | 428 | |
e142c38c | 429 | /* The language we are debugging. */ |
fcd3b13d SM |
430 | enum language language = language_unknown; |
431 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 432 | |
fcd3b13d | 433 | const char *producer = nullptr; |
b0f35d58 | 434 | |
c24bdb02 | 435 | private: |
804d2729 TT |
436 | /* The symtab builder for this CU. This is only non-NULL when full |
437 | symbols are being read. */ | |
c24bdb02 | 438 | std::unique_ptr<buildsym_compunit> m_builder; |
804d2729 | 439 | |
c24bdb02 | 440 | public: |
e142c38c DJ |
441 | /* The generic symbol table building routines have separate lists for |
442 | file scope symbols and all all other scopes (local scopes). So | |
443 | we need to select the right one to pass to add_symbol_to_list(). | |
444 | We do it by keeping a pointer to the correct list in list_in_scope. | |
445 | ||
446 | FIXME: The original dwarf code just treated the file scope as the | |
447 | first local scope, and all other local scopes as nested local | |
448 | scopes, and worked fine. Check to see if we really need to | |
449 | distinguish these in buildsym.c. */ | |
fcd3b13d | 450 | struct pending **list_in_scope = nullptr; |
e142c38c | 451 | |
b64f50a1 JK |
452 | /* Hash table holding all the loaded partial DIEs |
453 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 454 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
455 | |
456 | /* Storage for things with the same lifetime as this read-in compilation | |
457 | unit, including partial DIEs. */ | |
fcd3b13d | 458 | auto_obstack comp_unit_obstack; |
72bf9492 | 459 | |
ae038cb0 DJ |
460 | /* When multiple dwarf2_cu structures are living in memory, this field |
461 | chains them all together, so that they can be released efficiently. | |
462 | We will probably also want a generation counter so that most-recently-used | |
463 | compilation units are cached... */ | |
fcd3b13d | 464 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 465 | |
69d751e3 | 466 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
467 | struct dwarf2_per_cu_data *per_cu; |
468 | ||
469 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 470 | int last_used = 0; |
ae038cb0 | 471 | |
b64f50a1 JK |
472 | /* A hash table of DIE cu_offset for following references with |
473 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 474 | htab_t die_hash = nullptr; |
10b3939b DJ |
475 | |
476 | /* Full DIEs if read in. */ | |
fcd3b13d | 477 | struct die_info *dies = nullptr; |
10b3939b DJ |
478 | |
479 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
480 | units referenced by this one. Only set during full symbol processing; | |
481 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 482 | htab_t dependencies = nullptr; |
10b3939b | 483 | |
cb1df416 | 484 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 485 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
486 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
487 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
488 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
489 | to the line header as long as this DIE is being processed. See | |
490 | process_die_scope. */ | |
fcd3b13d | 491 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 492 | |
3da10d80 KS |
493 | /* A list of methods which need to have physnames computed |
494 | after all type information has been read. */ | |
c89b44cd | 495 | std::vector<delayed_method_info> method_list; |
3da10d80 | 496 | |
96408a79 | 497 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 498 | htab_t call_site_htab = nullptr; |
96408a79 | 499 | |
034e5797 DE |
500 | /* Non-NULL if this CU came from a DWO file. |
501 | There is an invariant here that is important to remember: | |
502 | Except for attributes copied from the top level DIE in the "main" | |
503 | (or "stub") file in preparation for reading the DWO file | |
504 | (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU. | |
505 | Either there isn't a DWO file (in which case this is NULL and the point | |
506 | is moot), or there is and either we're not going to read it (in which | |
507 | case this is NULL) or there is and we are reading it (in which case this | |
508 | is non-NULL). */ | |
fcd3b13d | 509 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 DE |
510 | |
511 | /* The DW_AT_addr_base attribute if present, zero otherwise | |
512 | (zero is a valid value though). | |
1dbab08b | 513 | Note this value comes from the Fission stub CU/TU's DIE. */ |
fcd3b13d | 514 | ULONGEST addr_base = 0; |
3019eac3 | 515 | |
2e3cf129 DE |
516 | /* The DW_AT_ranges_base attribute if present, zero otherwise |
517 | (zero is a valid value though). | |
1dbab08b | 518 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 519 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
520 | be used without needing to know whether DWO files are in use or not. |
521 | N.B. This does not apply to DW_AT_ranges appearing in | |
522 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
523 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
524 | DW_AT_ranges_base *would* have to be applied, and we'd have to care | |
525 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ | |
fcd3b13d | 526 | ULONGEST ranges_base = 0; |
2e3cf129 | 527 | |
c9317f21 TT |
528 | /* When reading debug info generated by older versions of rustc, we |
529 | have to rewrite some union types to be struct types with a | |
530 | variant part. This rewriting must be done after the CU is fully | |
531 | read in, because otherwise at the point of rewriting some struct | |
532 | type might not have been fully processed. So, we keep a list of | |
533 | all such types here and process them after expansion. */ | |
534 | std::vector<struct type *> rust_unions; | |
535 | ||
ae038cb0 | 536 | /* Mark used when releasing cached dies. */ |
9068261f | 537 | bool mark : 1; |
ae038cb0 | 538 | |
8be455d7 JK |
539 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
540 | This test is imperfect as there may exist optimized debug code not using | |
541 | any location list and still facing inlining issues if handled as | |
542 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
9068261f | 543 | bool has_loclist : 1; |
ba919b58 | 544 | |
9068261f | 545 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
1b80a9fa JK |
546 | if all the producer_is_* fields are valid. This information is cached |
547 | because profiling CU expansion showed excessive time spent in | |
548 | producer_is_gxx_lt_4_6. */ | |
9068261f AB |
549 | bool checked_producer : 1; |
550 | bool producer_is_gxx_lt_4_6 : 1; | |
551 | bool producer_is_gcc_lt_4_3 : 1; | |
eb77c9df | 552 | bool producer_is_icc : 1; |
9068261f | 553 | bool producer_is_icc_lt_14 : 1; |
c258c396 | 554 | bool producer_is_codewarrior : 1; |
4d4ec4e5 | 555 | |
9068261f | 556 | /* When true, the file that we're processing is known to have |
4d4ec4e5 TT |
557 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
558 | this information, but later versions do. */ | |
559 | ||
9068261f | 560 | bool processing_has_namespace_info : 1; |
d590ff25 YQ |
561 | |
562 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
c24bdb02 KS |
563 | |
564 | /* If this CU was inherited by another CU (via specification, | |
565 | abstract_origin, etc), this is the ancestor CU. */ | |
566 | dwarf2_cu *ancestor; | |
567 | ||
568 | /* Get the buildsym_compunit for this CU. */ | |
569 | buildsym_compunit *get_builder () | |
570 | { | |
571 | /* If this CU has a builder associated with it, use that. */ | |
572 | if (m_builder != nullptr) | |
573 | return m_builder.get (); | |
574 | ||
575 | /* Otherwise, search ancestors for a valid builder. */ | |
576 | if (ancestor != nullptr) | |
577 | return ancestor->get_builder (); | |
578 | ||
579 | return nullptr; | |
580 | } | |
e7c27a73 DJ |
581 | }; |
582 | ||
094b34ac DE |
583 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
584 | This includes type_unit_group and quick_file_names. */ | |
585 | ||
586 | struct stmt_list_hash | |
587 | { | |
588 | /* The DWO unit this table is from or NULL if there is none. */ | |
589 | struct dwo_unit *dwo_unit; | |
590 | ||
591 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 592 | sect_offset line_sect_off; |
094b34ac DE |
593 | }; |
594 | ||
f4dc4d17 DE |
595 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
596 | an object of this type. */ | |
597 | ||
598 | struct type_unit_group | |
599 | { | |
0186c6a7 | 600 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
601 | To simplify things we create an artificial CU that "includes" all the |
602 | type units using this stmt_list so that the rest of the code still has | |
603 | a "per_cu" handle on the symtab. | |
604 | This PER_CU is recognized by having no section. */ | |
8a0459fd | 605 | #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL) |
094b34ac DE |
606 | struct dwarf2_per_cu_data per_cu; |
607 | ||
0186c6a7 DE |
608 | /* The TUs that share this DW_AT_stmt_list entry. |
609 | This is added to while parsing type units to build partial symtabs, | |
610 | and is deleted afterwards and not used again. */ | |
a8b3b8e9 | 611 | std::vector<signatured_type *> *tus; |
f4dc4d17 | 612 | |
43f3e411 | 613 | /* The compunit symtab. |
094b34ac | 614 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
615 | so we create an essentially anonymous symtab as the compunit symtab. */ |
616 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 617 | |
094b34ac DE |
618 | /* The data used to construct the hash key. */ |
619 | struct stmt_list_hash hash; | |
f4dc4d17 DE |
620 | |
621 | /* The number of symtabs from the line header. | |
622 | The value here must match line_header.num_file_names. */ | |
623 | unsigned int num_symtabs; | |
624 | ||
625 | /* The symbol tables for this TU (obtained from the files listed in | |
626 | DW_AT_stmt_list). | |
627 | WARNING: The order of entries here must match the order of entries | |
628 | in the line header. After the first TU using this type_unit_group, the | |
629 | line header for the subsequent TUs is recreated from this. This is done | |
630 | because we need to use the same symtabs for each TU using the same | |
631 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
632 | there's no guarantee the line header doesn't have duplicate entries. */ | |
633 | struct symtab **symtabs; | |
634 | }; | |
635 | ||
73869dc2 | 636 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
637 | |
638 | struct dwo_sections | |
639 | { | |
640 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
641 | struct dwarf2_section_info line; |
642 | struct dwarf2_section_info loc; | |
43988095 | 643 | struct dwarf2_section_info loclists; |
09262596 DE |
644 | struct dwarf2_section_info macinfo; |
645 | struct dwarf2_section_info macro; | |
3019eac3 DE |
646 | struct dwarf2_section_info str; |
647 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
648 | /* In the case of a virtual DWO file, these two are unused. */ |
649 | struct dwarf2_section_info info; | |
fd5866f6 | 650 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
651 | }; |
652 | ||
c88ee1f0 | 653 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
654 | |
655 | struct dwo_unit | |
656 | { | |
657 | /* Backlink to the containing struct dwo_file. */ | |
658 | struct dwo_file *dwo_file; | |
659 | ||
660 | /* The "id" that distinguishes this CU/TU. | |
661 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
662 | Since signatures came first, we stick with it for consistency. */ | |
663 | ULONGEST signature; | |
664 | ||
665 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 666 | struct dwarf2_section_info *section; |
3019eac3 | 667 | |
9c541725 PA |
668 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
669 | sect_offset sect_off; | |
3019eac3 DE |
670 | unsigned int length; |
671 | ||
672 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
673 | cu_offset type_offset_in_tu; | |
674 | }; | |
675 | ||
73869dc2 DE |
676 | /* include/dwarf2.h defines the DWP section codes. |
677 | It defines a max value but it doesn't define a min value, which we | |
678 | use for error checking, so provide one. */ | |
679 | ||
680 | enum dwp_v2_section_ids | |
681 | { | |
682 | DW_SECT_MIN = 1 | |
683 | }; | |
684 | ||
80626a55 | 685 | /* Data for one DWO file. |
57d63ce2 DE |
686 | |
687 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
688 | appears in a DWP file). DWP files don't really have DWO files per se - | |
689 | comdat folding of types "loses" the DWO file they came from, and from | |
690 | a high level view DWP files appear to contain a mass of random types. | |
691 | However, to maintain consistency with the non-DWP case we pretend DWP | |
692 | files contain virtual DWO files, and we assign each TU with one virtual | |
693 | DWO file (generally based on the line and abbrev section offsets - | |
694 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
695 | |
696 | struct dwo_file | |
697 | { | |
51ac9db5 SM |
698 | dwo_file () = default; |
699 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
700 | ||
0ac5b59e | 701 | /* The DW_AT_GNU_dwo_name attribute. |
80626a55 DE |
702 | For virtual DWO files the name is constructed from the section offsets |
703 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
704 | from related CU+TUs. */ | |
51ac9db5 | 705 | const char *dwo_name = nullptr; |
0ac5b59e DE |
706 | |
707 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 708 | const char *comp_dir = nullptr; |
3019eac3 | 709 | |
80626a55 DE |
710 | /* The bfd, when the file is open. Otherwise this is NULL. |
711 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 712 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 713 | |
73869dc2 DE |
714 | /* The sections that make up this DWO file. |
715 | Remember that for virtual DWO files in DWP V2, these are virtual | |
716 | sections (for lack of a better name). */ | |
51ac9db5 | 717 | struct dwo_sections sections {}; |
3019eac3 | 718 | |
33c5cd75 DB |
719 | /* The CUs in the file. |
720 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
721 | an extension to handle LLVM's Link Time Optimization output (where | |
722 | multiple source files may be compiled into a single object/dwo pair). */ | |
51ac9db5 | 723 | htab_t cus {}; |
3019eac3 DE |
724 | |
725 | /* Table of TUs in the file. | |
726 | Each element is a struct dwo_unit. */ | |
51ac9db5 | 727 | htab_t tus {}; |
3019eac3 DE |
728 | }; |
729 | ||
80626a55 DE |
730 | /* These sections are what may appear in a DWP file. */ |
731 | ||
732 | struct dwp_sections | |
733 | { | |
73869dc2 | 734 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
735 | struct dwarf2_section_info str; |
736 | struct dwarf2_section_info cu_index; | |
737 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
738 | |
739 | /* These are only used by DWP version 2 files. | |
740 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
741 | sections are referenced by section number, and are not recorded here. | |
742 | In DWP version 2 there is at most one copy of all these sections, each | |
743 | section being (effectively) comprised of the concatenation of all of the | |
744 | individual sections that exist in the version 1 format. | |
745 | To keep the code simple we treat each of these concatenated pieces as a | |
746 | section itself (a virtual section?). */ | |
747 | struct dwarf2_section_info abbrev; | |
748 | struct dwarf2_section_info info; | |
749 | struct dwarf2_section_info line; | |
750 | struct dwarf2_section_info loc; | |
751 | struct dwarf2_section_info macinfo; | |
752 | struct dwarf2_section_info macro; | |
753 | struct dwarf2_section_info str_offsets; | |
754 | struct dwarf2_section_info types; | |
80626a55 DE |
755 | }; |
756 | ||
73869dc2 DE |
757 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
758 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 759 | |
73869dc2 | 760 | struct virtual_v1_dwo_sections |
80626a55 DE |
761 | { |
762 | struct dwarf2_section_info abbrev; | |
763 | struct dwarf2_section_info line; | |
764 | struct dwarf2_section_info loc; | |
765 | struct dwarf2_section_info macinfo; | |
766 | struct dwarf2_section_info macro; | |
767 | struct dwarf2_section_info str_offsets; | |
768 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 769 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
770 | struct dwarf2_section_info info_or_types; |
771 | }; | |
772 | ||
73869dc2 DE |
773 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
774 | In version 2, the sections of the DWO files are concatenated together | |
775 | and stored in one section of that name. Thus each ELF section contains | |
776 | several "virtual" sections. */ | |
777 | ||
778 | struct virtual_v2_dwo_sections | |
779 | { | |
780 | bfd_size_type abbrev_offset; | |
781 | bfd_size_type abbrev_size; | |
782 | ||
783 | bfd_size_type line_offset; | |
784 | bfd_size_type line_size; | |
785 | ||
786 | bfd_size_type loc_offset; | |
787 | bfd_size_type loc_size; | |
788 | ||
789 | bfd_size_type macinfo_offset; | |
790 | bfd_size_type macinfo_size; | |
791 | ||
792 | bfd_size_type macro_offset; | |
793 | bfd_size_type macro_size; | |
794 | ||
795 | bfd_size_type str_offsets_offset; | |
796 | bfd_size_type str_offsets_size; | |
797 | ||
798 | /* Each DWP hash table entry records one CU or one TU. | |
799 | That is recorded here, and copied to dwo_unit.section. */ | |
800 | bfd_size_type info_or_types_offset; | |
801 | bfd_size_type info_or_types_size; | |
802 | }; | |
803 | ||
80626a55 DE |
804 | /* Contents of DWP hash tables. */ |
805 | ||
806 | struct dwp_hash_table | |
807 | { | |
73869dc2 | 808 | uint32_t version, nr_columns; |
80626a55 | 809 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
810 | const gdb_byte *hash_table, *unit_table; |
811 | union | |
812 | { | |
813 | struct | |
814 | { | |
815 | const gdb_byte *indices; | |
816 | } v1; | |
817 | struct | |
818 | { | |
819 | /* This is indexed by column number and gives the id of the section | |
820 | in that column. */ | |
821 | #define MAX_NR_V2_DWO_SECTIONS \ | |
822 | (1 /* .debug_info or .debug_types */ \ | |
823 | + 1 /* .debug_abbrev */ \ | |
824 | + 1 /* .debug_line */ \ | |
825 | + 1 /* .debug_loc */ \ | |
826 | + 1 /* .debug_str_offsets */ \ | |
827 | + 1 /* .debug_macro or .debug_macinfo */) | |
828 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
829 | const gdb_byte *offsets; | |
830 | const gdb_byte *sizes; | |
831 | } v2; | |
832 | } section_pool; | |
80626a55 DE |
833 | }; |
834 | ||
835 | /* Data for one DWP file. */ | |
836 | ||
837 | struct dwp_file | |
838 | { | |
400174b1 TT |
839 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
840 | : name (name_), | |
841 | dbfd (std::move (abfd)) | |
842 | { | |
843 | } | |
844 | ||
80626a55 DE |
845 | /* Name of the file. */ |
846 | const char *name; | |
847 | ||
73869dc2 | 848 | /* File format version. */ |
400174b1 | 849 | int version = 0; |
73869dc2 | 850 | |
93417882 | 851 | /* The bfd. */ |
400174b1 | 852 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
853 | |
854 | /* Section info for this file. */ | |
400174b1 | 855 | struct dwp_sections sections {}; |
80626a55 | 856 | |
57d63ce2 | 857 | /* Table of CUs in the file. */ |
400174b1 | 858 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
859 | |
860 | /* Table of TUs in the file. */ | |
400174b1 | 861 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 862 | |
19ac8c2e | 863 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
400174b1 TT |
864 | htab_t loaded_cus {}; |
865 | htab_t loaded_tus {}; | |
80626a55 | 866 | |
73869dc2 DE |
867 | /* Table to map ELF section numbers to their sections. |
868 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
869 | unsigned int num_sections = 0; |
870 | asection **elf_sections = nullptr; | |
80626a55 DE |
871 | }; |
872 | ||
0963b4bd MS |
873 | /* Struct used to pass misc. parameters to read_die_and_children, et |
874 | al. which are used for both .debug_info and .debug_types dies. | |
875 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 876 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
877 | |
878 | struct die_reader_specs | |
879 | { | |
a32a8923 | 880 | /* The bfd of die_section. */ |
93311388 DE |
881 | bfd* abfd; |
882 | ||
883 | /* The CU of the DIE we are parsing. */ | |
884 | struct dwarf2_cu *cu; | |
885 | ||
80626a55 | 886 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
887 | struct dwo_file *dwo_file; |
888 | ||
dee91e82 | 889 | /* The section the die comes from. |
3019eac3 | 890 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
891 | struct dwarf2_section_info *die_section; |
892 | ||
893 | /* die_section->buffer. */ | |
d521ce57 | 894 | const gdb_byte *buffer; |
f664829e DE |
895 | |
896 | /* The end of the buffer. */ | |
897 | const gdb_byte *buffer_end; | |
a2ce51a0 DE |
898 | |
899 | /* The value of the DW_AT_comp_dir attribute. */ | |
900 | const char *comp_dir; | |
685af9cd TT |
901 | |
902 | /* The abbreviation table to use when reading the DIEs. */ | |
903 | struct abbrev_table *abbrev_table; | |
93311388 DE |
904 | }; |
905 | ||
fd820528 | 906 | /* Type of function passed to init_cutu_and_read_dies, et.al. */ |
dee91e82 | 907 | typedef void (die_reader_func_ftype) (const struct die_reader_specs *reader, |
d521ce57 | 908 | const gdb_byte *info_ptr, |
dee91e82 DE |
909 | struct die_info *comp_unit_die, |
910 | int has_children, | |
911 | void *data); | |
912 | ||
7ba99d21 AT |
913 | /* dir_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 and |
914 | later. */ | |
915 | typedef int dir_index; | |
ecfb656c | 916 | |
7ba99d21 AT |
917 | /* file_name_index is 1-based in DWARF 4 and before, and is 0-based in DWARF 5 |
918 | and later. */ | |
919 | typedef int file_name_index; | |
ecfb656c | 920 | |
52059ffd TT |
921 | struct file_entry |
922 | { | |
fff8551c PA |
923 | file_entry () = default; |
924 | ||
ecfb656c | 925 | file_entry (const char *name_, dir_index d_index_, |
fff8551c PA |
926 | unsigned int mod_time_, unsigned int length_) |
927 | : name (name_), | |
ecfb656c | 928 | d_index (d_index_), |
fff8551c PA |
929 | mod_time (mod_time_), |
930 | length (length_) | |
931 | {} | |
932 | ||
ecfb656c PA |
933 | /* Return the include directory at D_INDEX stored in LH. Returns |
934 | NULL if D_INDEX is out of bounds. */ | |
8c43009f PA |
935 | const char *include_dir (const line_header *lh) const; |
936 | ||
fff8551c PA |
937 | /* The file name. Note this is an observing pointer. The memory is |
938 | owned by debug_line_buffer. */ | |
939 | const char *name {}; | |
940 | ||
8c43009f | 941 | /* The directory index (1-based). */ |
ecfb656c | 942 | dir_index d_index {}; |
fff8551c PA |
943 | |
944 | unsigned int mod_time {}; | |
945 | ||
946 | unsigned int length {}; | |
947 | ||
948 | /* True if referenced by the Line Number Program. */ | |
949 | bool included_p {}; | |
950 | ||
83769d0b | 951 | /* The associated symbol table, if any. */ |
fff8551c | 952 | struct symtab *symtab {}; |
52059ffd TT |
953 | }; |
954 | ||
debd256d JB |
955 | /* The line number information for a compilation unit (found in the |
956 | .debug_line section) begins with a "statement program header", | |
957 | which contains the following information. */ | |
958 | struct line_header | |
959 | { | |
fff8551c PA |
960 | line_header () |
961 | : offset_in_dwz {} | |
962 | {} | |
963 | ||
964 | /* Add an entry to the include directory table. */ | |
965 | void add_include_dir (const char *include_dir); | |
966 | ||
967 | /* Add an entry to the file name table. */ | |
ecfb656c | 968 | void add_file_name (const char *name, dir_index d_index, |
fff8551c PA |
969 | unsigned int mod_time, unsigned int length); |
970 | ||
7ba99d21 AT |
971 | /* Return the include dir at INDEX (0-based in DWARF 5 and 1-based before). |
972 | Returns NULL if INDEX is out of bounds. */ | |
ecfb656c | 973 | const char *include_dir_at (dir_index index) const |
8c43009f | 974 | { |
7ba99d21 AT |
975 | int vec_index; |
976 | if (version >= 5) | |
977 | vec_index = index; | |
978 | else | |
979 | vec_index = index - 1; | |
980 | if (vec_index < 0 || vec_index >= m_include_dirs.size ()) | |
8c43009f | 981 | return NULL; |
7ba99d21 | 982 | return m_include_dirs[vec_index]; |
8c43009f PA |
983 | } |
984 | ||
7ba99d21 | 985 | bool is_valid_file_index (int file_index) |
8c43009f | 986 | { |
7ba99d21 AT |
987 | if (version >= 5) |
988 | return 0 <= file_index && file_index < file_names_size (); | |
989 | return 1 <= file_index && file_index <= file_names_size (); | |
990 | } | |
ecfb656c | 991 | |
7ba99d21 AT |
992 | /* Return the file name at INDEX (0-based in DWARF 5 and 1-based before). |
993 | Returns NULL if INDEX is out of bounds. */ | |
994 | file_entry *file_name_at (file_name_index index) | |
995 | { | |
996 | int vec_index; | |
997 | if (version >= 5) | |
998 | vec_index = index; | |
999 | else | |
1000 | vec_index = index - 1; | |
1001 | if (vec_index < 0 || vec_index >= m_file_names.size ()) | |
fff8551c | 1002 | return NULL; |
7ba99d21 | 1003 | return &m_file_names[vec_index]; |
fff8551c PA |
1004 | } |
1005 | ||
7ba99d21 AT |
1006 | /* The indexes are 0-based in DWARF 5 and 1-based in DWARF 4. Therefore, |
1007 | this method should only be used to iterate through all file entries in an | |
1008 | index-agnostic manner. */ | |
1009 | std::vector<file_entry> &file_names () | |
1010 | { return m_file_names; } | |
1011 | ||
527f3840 | 1012 | /* Offset of line number information in .debug_line section. */ |
9c541725 | 1013 | sect_offset sect_off {}; |
527f3840 JK |
1014 | |
1015 | /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */ | |
fff8551c PA |
1016 | unsigned offset_in_dwz : 1; /* Can't initialize bitfields in-class. */ |
1017 | ||
1018 | unsigned int total_length {}; | |
1019 | unsigned short version {}; | |
1020 | unsigned int header_length {}; | |
1021 | unsigned char minimum_instruction_length {}; | |
1022 | unsigned char maximum_ops_per_instruction {}; | |
1023 | unsigned char default_is_stmt {}; | |
1024 | int line_base {}; | |
1025 | unsigned char line_range {}; | |
1026 | unsigned char opcode_base {}; | |
debd256d JB |
1027 | |
1028 | /* standard_opcode_lengths[i] is the number of operands for the | |
1029 | standard opcode whose value is i. This means that | |
1030 | standard_opcode_lengths[0] is unused, and the last meaningful | |
1031 | element is standard_opcode_lengths[opcode_base - 1]. */ | |
fff8551c | 1032 | std::unique_ptr<unsigned char[]> standard_opcode_lengths; |
debd256d | 1033 | |
7ba99d21 AT |
1034 | int file_names_size () |
1035 | { return m_file_names.size(); } | |
debd256d JB |
1036 | |
1037 | /* The start and end of the statement program following this | |
6502dd73 | 1038 | header. These point into dwarf2_per_objfile->line_buffer. */ |
fff8551c | 1039 | const gdb_byte *statement_program_start {}, *statement_program_end {}; |
7ba99d21 AT |
1040 | |
1041 | private: | |
1042 | /* The include_directories table. Note these are observing | |
1043 | pointers. The memory is owned by debug_line_buffer. */ | |
1044 | std::vector<const char *> m_include_dirs; | |
1045 | ||
1046 | /* The file_names table. This is private because the meaning of indexes | |
1047 | differs among DWARF versions (The first valid index is 1 in DWARF 4 and | |
1048 | before, and is 0 in DWARF 5 and later). So the client should use | |
1049 | file_name_at method for access. */ | |
1050 | std::vector<file_entry> m_file_names; | |
debd256d | 1051 | }; |
c906108c | 1052 | |
fff8551c PA |
1053 | typedef std::unique_ptr<line_header> line_header_up; |
1054 | ||
8c43009f PA |
1055 | const char * |
1056 | file_entry::include_dir (const line_header *lh) const | |
1057 | { | |
ecfb656c | 1058 | return lh->include_dir_at (d_index); |
8c43009f PA |
1059 | } |
1060 | ||
c906108c | 1061 | /* When we construct a partial symbol table entry we only |
0963b4bd | 1062 | need this much information. */ |
6f06d47b | 1063 | struct partial_die_info : public allocate_on_obstack |
c906108c | 1064 | { |
6f06d47b YQ |
1065 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
1066 | ||
1067 | /* Disable assign but still keep copy ctor, which is needed | |
1068 | load_partial_dies. */ | |
1069 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
1070 | ||
52356b79 YQ |
1071 | /* Adjust the partial die before generating a symbol for it. This |
1072 | function may set the is_external flag or change the DIE's | |
1073 | name. */ | |
1074 | void fixup (struct dwarf2_cu *cu); | |
1075 | ||
48fbe735 YQ |
1076 | /* Read a minimal amount of information into the minimal die |
1077 | structure. */ | |
1078 | const gdb_byte *read (const struct die_reader_specs *reader, | |
1079 | const struct abbrev_info &abbrev, | |
1080 | const gdb_byte *info_ptr); | |
1081 | ||
72bf9492 | 1082 | /* Offset of this DIE. */ |
6f06d47b | 1083 | const sect_offset sect_off; |
72bf9492 DJ |
1084 | |
1085 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 1086 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 1087 | |
72bf9492 | 1088 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
1089 | const unsigned int has_children : 1; |
1090 | ||
72bf9492 DJ |
1091 | unsigned int is_external : 1; |
1092 | unsigned int is_declaration : 1; | |
1093 | unsigned int has_type : 1; | |
1094 | unsigned int has_specification : 1; | |
1095 | unsigned int has_pc_info : 1; | |
481860b3 | 1096 | unsigned int may_be_inlined : 1; |
72bf9492 | 1097 | |
0c1b455e TT |
1098 | /* This DIE has been marked DW_AT_main_subprogram. */ |
1099 | unsigned int main_subprogram : 1; | |
1100 | ||
72bf9492 DJ |
1101 | /* Flag set if the SCOPE field of this structure has been |
1102 | computed. */ | |
1103 | unsigned int scope_set : 1; | |
1104 | ||
fa4028e9 JB |
1105 | /* Flag set if the DIE has a byte_size attribute. */ |
1106 | unsigned int has_byte_size : 1; | |
1107 | ||
ff908ebf AW |
1108 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
1109 | unsigned int has_const_value : 1; | |
1110 | ||
98bfdba5 PA |
1111 | /* Flag set if any of the DIE's children are template arguments. */ |
1112 | unsigned int has_template_arguments : 1; | |
1113 | ||
52356b79 | 1114 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
1115 | unsigned int fixup_called : 1; |
1116 | ||
36586728 TT |
1117 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
1118 | unsigned int is_dwz : 1; | |
1119 | ||
1120 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
1121 | unsigned int spec_is_dwz : 1; | |
1122 | ||
72bf9492 | 1123 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 1124 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 1125 | const char *name = nullptr; |
72bf9492 | 1126 | |
abc72ce4 | 1127 | /* The linkage name, if present. */ |
6f06d47b | 1128 | const char *linkage_name = nullptr; |
abc72ce4 | 1129 | |
72bf9492 DJ |
1130 | /* The scope to prepend to our children. This is generally |
1131 | allocated on the comp_unit_obstack, so will disappear | |
1132 | when this compilation unit leaves the cache. */ | |
6f06d47b | 1133 | const char *scope = nullptr; |
72bf9492 | 1134 | |
95554aad TT |
1135 | /* Some data associated with the partial DIE. The tag determines |
1136 | which field is live. */ | |
1137 | union | |
1138 | { | |
1139 | /* The location description associated with this DIE, if any. */ | |
1140 | struct dwarf_block *locdesc; | |
1141 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 1142 | sect_offset sect_off; |
6f06d47b | 1143 | } d {}; |
72bf9492 DJ |
1144 | |
1145 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
1146 | CORE_ADDR lowpc = 0; |
1147 | CORE_ADDR highpc = 0; | |
72bf9492 | 1148 | |
93311388 | 1149 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1150 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1151 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1152 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1153 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1154 | |
1155 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1156 | DW_AT_specification (or DW_AT_abstract_origin or | |
1157 | DW_AT_extension). */ | |
6f06d47b | 1158 | sect_offset spec_offset {}; |
72bf9492 DJ |
1159 | |
1160 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1161 | if any. */ | |
6f06d47b YQ |
1162 | struct partial_die_info *die_parent = nullptr; |
1163 | struct partial_die_info *die_child = nullptr; | |
1164 | struct partial_die_info *die_sibling = nullptr; | |
1165 | ||
1166 | friend struct partial_die_info * | |
1167 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1168 | ||
1169 | private: | |
1170 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1171 | partial_die_info (sect_offset sect_off) | |
1172 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1173 | { | |
1174 | } | |
1175 | ||
1176 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1177 | int has_children_) | |
1178 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1179 | { | |
1180 | is_external = 0; | |
1181 | is_declaration = 0; | |
1182 | has_type = 0; | |
1183 | has_specification = 0; | |
1184 | has_pc_info = 0; | |
1185 | may_be_inlined = 0; | |
1186 | main_subprogram = 0; | |
1187 | scope_set = 0; | |
1188 | has_byte_size = 0; | |
1189 | has_const_value = 0; | |
1190 | has_template_arguments = 0; | |
1191 | fixup_called = 0; | |
1192 | is_dwz = 0; | |
1193 | spec_is_dwz = 0; | |
1194 | } | |
c906108c SS |
1195 | }; |
1196 | ||
0963b4bd | 1197 | /* This data structure holds the information of an abbrev. */ |
c906108c SS |
1198 | struct abbrev_info |
1199 | { | |
1200 | unsigned int number; /* number identifying abbrev */ | |
1201 | enum dwarf_tag tag; /* dwarf tag */ | |
f3dd6933 DJ |
1202 | unsigned short has_children; /* boolean */ |
1203 | unsigned short num_attrs; /* number of attributes */ | |
c906108c SS |
1204 | struct attr_abbrev *attrs; /* an array of attribute descriptions */ |
1205 | struct abbrev_info *next; /* next in chain */ | |
1206 | }; | |
1207 | ||
1208 | struct attr_abbrev | |
1209 | { | |
9d25dd43 DE |
1210 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
1211 | ENUM_BITFIELD(dwarf_form) form : 16; | |
43988095 JK |
1212 | |
1213 | /* It is valid only if FORM is DW_FORM_implicit_const. */ | |
1214 | LONGEST implicit_const; | |
c906108c SS |
1215 | }; |
1216 | ||
433df2d4 DE |
1217 | /* Size of abbrev_table.abbrev_hash_table. */ |
1218 | #define ABBREV_HASH_SIZE 121 | |
1219 | ||
1220 | /* Top level data structure to contain an abbreviation table. */ | |
1221 | ||
1222 | struct abbrev_table | |
1223 | { | |
685af9cd TT |
1224 | explicit abbrev_table (sect_offset off) |
1225 | : sect_off (off) | |
1226 | { | |
4a17f768 | 1227 | m_abbrevs = |
685af9cd | 1228 | XOBNEWVEC (&abbrev_obstack, struct abbrev_info *, ABBREV_HASH_SIZE); |
4a17f768 | 1229 | memset (m_abbrevs, 0, ABBREV_HASH_SIZE * sizeof (struct abbrev_info *)); |
685af9cd TT |
1230 | } |
1231 | ||
1232 | DISABLE_COPY_AND_ASSIGN (abbrev_table); | |
1233 | ||
1234 | /* Allocate space for a struct abbrev_info object in | |
1235 | ABBREV_TABLE. */ | |
1236 | struct abbrev_info *alloc_abbrev (); | |
1237 | ||
1238 | /* Add an abbreviation to the table. */ | |
1239 | void add_abbrev (unsigned int abbrev_number, struct abbrev_info *abbrev); | |
1240 | ||
1241 | /* Look up an abbrev in the table. | |
1242 | Returns NULL if the abbrev is not found. */ | |
1243 | ||
1244 | struct abbrev_info *lookup_abbrev (unsigned int abbrev_number); | |
1245 | ||
1246 | ||
f4dc4d17 DE |
1247 | /* Where the abbrev table came from. |
1248 | This is used as a sanity check when the table is used. */ | |
685af9cd | 1249 | const sect_offset sect_off; |
433df2d4 DE |
1250 | |
1251 | /* Storage for the abbrev table. */ | |
685af9cd | 1252 | auto_obstack abbrev_obstack; |
433df2d4 | 1253 | |
4a17f768 YQ |
1254 | private: |
1255 | ||
433df2d4 DE |
1256 | /* Hash table of abbrevs. |
1257 | This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack. | |
1258 | It could be statically allocated, but the previous code didn't so we | |
1259 | don't either. */ | |
4a17f768 | 1260 | struct abbrev_info **m_abbrevs; |
433df2d4 DE |
1261 | }; |
1262 | ||
685af9cd TT |
1263 | typedef std::unique_ptr<struct abbrev_table> abbrev_table_up; |
1264 | ||
0963b4bd | 1265 | /* Attributes have a name and a value. */ |
b60c80d6 DJ |
1266 | struct attribute |
1267 | { | |
9d25dd43 | 1268 | ENUM_BITFIELD(dwarf_attribute) name : 16; |
8285870a JK |
1269 | ENUM_BITFIELD(dwarf_form) form : 15; |
1270 | ||
1271 | /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This | |
1272 | field should be in u.str (existing only for DW_STRING) but it is kept | |
1273 | here for better struct attribute alignment. */ | |
1274 | unsigned int string_is_canonical : 1; | |
1275 | ||
b60c80d6 DJ |
1276 | union |
1277 | { | |
15d034d0 | 1278 | const char *str; |
b60c80d6 | 1279 | struct dwarf_block *blk; |
43bbcdc2 PH |
1280 | ULONGEST unsnd; |
1281 | LONGEST snd; | |
b60c80d6 | 1282 | CORE_ADDR addr; |
ac9ec31b | 1283 | ULONGEST signature; |
b60c80d6 DJ |
1284 | } |
1285 | u; | |
1286 | }; | |
1287 | ||
0963b4bd | 1288 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1289 | struct die_info |
1290 | { | |
76815b17 DE |
1291 | /* DWARF-2 tag for this DIE. */ |
1292 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1293 | ||
1294 | /* Number of attributes */ | |
98bfdba5 PA |
1295 | unsigned char num_attrs; |
1296 | ||
1297 | /* True if we're presently building the full type name for the | |
1298 | type derived from this DIE. */ | |
1299 | unsigned char building_fullname : 1; | |
76815b17 | 1300 | |
adde2bff DE |
1301 | /* True if this die is in process. PR 16581. */ |
1302 | unsigned char in_process : 1; | |
1303 | ||
76815b17 DE |
1304 | /* Abbrev number */ |
1305 | unsigned int abbrev; | |
1306 | ||
93311388 | 1307 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1308 | sect_offset sect_off; |
78ba4af6 JB |
1309 | |
1310 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1311 | points to this die's parent; CHILD points to the first child of | |
1312 | this node; and all the children of a given node are chained | |
4950bc1c | 1313 | together via their SIBLING fields. */ |
639d11d3 DC |
1314 | struct die_info *child; /* Its first child, if any. */ |
1315 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1316 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1317 | |
b60c80d6 DJ |
1318 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1319 | zero, but it's not common and zero-sized arrays are not | |
1320 | sufficiently portable C. */ | |
1321 | struct attribute attrs[1]; | |
c906108c SS |
1322 | }; |
1323 | ||
0963b4bd | 1324 | /* Get at parts of an attribute structure. */ |
c906108c SS |
1325 | |
1326 | #define DW_STRING(attr) ((attr)->u.str) | |
8285870a | 1327 | #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical) |
c906108c SS |
1328 | #define DW_UNSND(attr) ((attr)->u.unsnd) |
1329 | #define DW_BLOCK(attr) ((attr)->u.blk) | |
1330 | #define DW_SND(attr) ((attr)->u.snd) | |
1331 | #define DW_ADDR(attr) ((attr)->u.addr) | |
ac9ec31b | 1332 | #define DW_SIGNATURE(attr) ((attr)->u.signature) |
c906108c | 1333 | |
0963b4bd | 1334 | /* Blocks are a bunch of untyped bytes. */ |
c906108c SS |
1335 | struct dwarf_block |
1336 | { | |
56eb65bd | 1337 | size_t size; |
1d6edc3c JK |
1338 | |
1339 | /* Valid only if SIZE is not zero. */ | |
d521ce57 | 1340 | const gdb_byte *data; |
c906108c SS |
1341 | }; |
1342 | ||
c906108c SS |
1343 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1344 | but this would require a corresponding change in unpack_field_as_long | |
1345 | and friends. */ | |
1346 | static int bits_per_byte = 8; | |
1347 | ||
2ddeaf8a TT |
1348 | /* When reading a variant or variant part, we track a bit more |
1349 | information about the field, and store it in an object of this | |
1350 | type. */ | |
1351 | ||
1352 | struct variant_field | |
1353 | { | |
1354 | /* If we see a DW_TAG_variant, then this will be the discriminant | |
1355 | value. */ | |
1356 | ULONGEST discriminant_value; | |
1357 | /* If we see a DW_TAG_variant, then this will be set if this is the | |
1358 | default branch. */ | |
1359 | bool default_branch; | |
1360 | /* While reading a DW_TAG_variant_part, this will be set if this | |
1361 | field is the discriminant. */ | |
1362 | bool is_discriminant; | |
1363 | }; | |
1364 | ||
52059ffd TT |
1365 | struct nextfield |
1366 | { | |
be2daae6 TT |
1367 | int accessibility = 0; |
1368 | int virtuality = 0; | |
2ddeaf8a | 1369 | /* Extra information to describe a variant or variant part. */ |
be2daae6 TT |
1370 | struct variant_field variant {}; |
1371 | struct field field {}; | |
52059ffd TT |
1372 | }; |
1373 | ||
1374 | struct fnfieldlist | |
1375 | { | |
be2daae6 TT |
1376 | const char *name = nullptr; |
1377 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1378 | }; |
1379 | ||
c906108c SS |
1380 | /* The routines that read and process dies for a C struct or C++ class |
1381 | pass lists of data member fields and lists of member function fields | |
1382 | in an instance of a field_info structure, as defined below. */ | |
1383 | struct field_info | |
c5aa993b | 1384 | { |
0963b4bd | 1385 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1386 | std::vector<struct nextfield> fields; |
1387 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1388 | |
7d0ccb61 | 1389 | /* Number of fields (including baseclasses). */ |
be2daae6 | 1390 | int nfields = 0; |
c906108c | 1391 | |
85102364 | 1392 | /* Set if the accessibility of one of the fields is not public. */ |
be2daae6 | 1393 | int non_public_fields = 0; |
c906108c | 1394 | |
c5aa993b JM |
1395 | /* Member function fieldlist array, contains name of possibly overloaded |
1396 | member function, number of overloaded member functions and a pointer | |
1397 | to the head of the member function field chain. */ | |
be2daae6 | 1398 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1399 | |
1400 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1401 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1402 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1403 | |
1404 | /* Nested types defined by this class and the number of elements in this | |
1405 | list. */ | |
be2daae6 | 1406 | std::vector<struct decl_field> nested_types_list; |
c5aa993b | 1407 | }; |
c906108c | 1408 | |
10b3939b DJ |
1409 | /* One item on the queue of compilation units to read in full symbols |
1410 | for. */ | |
1411 | struct dwarf2_queue_item | |
1412 | { | |
1413 | struct dwarf2_per_cu_data *per_cu; | |
95554aad | 1414 | enum language pretend_language; |
10b3939b DJ |
1415 | struct dwarf2_queue_item *next; |
1416 | }; | |
1417 | ||
1418 | /* The current queue. */ | |
1419 | static struct dwarf2_queue_item *dwarf2_queue, *dwarf2_queue_tail; | |
1420 | ||
ae038cb0 DJ |
1421 | /* Loaded secondary compilation units are kept in memory until they |
1422 | have not been referenced for the processing of this many | |
1423 | compilation units. Set this to zero to disable caching. Cache | |
1424 | sizes of up to at least twenty will improve startup time for | |
1425 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1426 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1427 | static void |
b4f54984 DE |
1428 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1429 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1430 | { |
3e43a32a | 1431 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1432 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1433 | value); |
1434 | } | |
4390d890 | 1435 | \f |
c906108c SS |
1436 | /* local function prototypes */ |
1437 | ||
a32a8923 DE |
1438 | static const char *get_section_name (const struct dwarf2_section_info *); |
1439 | ||
1440 | static const char *get_section_file_name (const struct dwarf2_section_info *); | |
1441 | ||
918dd910 JK |
1442 | static void dwarf2_find_base_address (struct die_info *die, |
1443 | struct dwarf2_cu *cu); | |
1444 | ||
0018ea6f DE |
1445 | static struct partial_symtab *create_partial_symtab |
1446 | (struct dwarf2_per_cu_data *per_cu, const char *name); | |
1447 | ||
f1902523 JK |
1448 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1449 | const gdb_byte *info_ptr, | |
1450 | struct die_info *type_unit_die, | |
1451 | int has_children, void *data); | |
1452 | ||
ed2dc618 SM |
1453 | static void dwarf2_build_psymtabs_hard |
1454 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1455 | |
72bf9492 DJ |
1456 | static void scan_partial_symbols (struct partial_die_info *, |
1457 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1458 | int, struct dwarf2_cu *); |
c906108c | 1459 | |
72bf9492 DJ |
1460 | static void add_partial_symbol (struct partial_die_info *, |
1461 | struct dwarf2_cu *); | |
63d06c5c | 1462 | |
72bf9492 DJ |
1463 | static void add_partial_namespace (struct partial_die_info *pdi, |
1464 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1465 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1466 | |
5d7cb8df | 1467 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1468 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1469 | struct dwarf2_cu *cu); |
1470 | ||
72bf9492 DJ |
1471 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1472 | struct dwarf2_cu *cu); | |
91c24f0a | 1473 | |
bc30ff58 JB |
1474 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1475 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1476 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1477 | |
257e7a09 YQ |
1478 | static void dwarf2_read_symtab (struct partial_symtab *, |
1479 | struct objfile *); | |
c906108c | 1480 | |
a14ed312 | 1481 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 1482 | |
685af9cd | 1483 | static abbrev_table_up abbrev_table_read_table |
ed2dc618 SM |
1484 | (struct dwarf2_per_objfile *dwarf2_per_objfile, struct dwarf2_section_info *, |
1485 | sect_offset); | |
433df2d4 | 1486 | |
d521ce57 | 1487 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1488 | |
dee91e82 | 1489 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1490 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1491 | |
fb816e8b TV |
1492 | /* A pair of partial_die_info and compilation unit. */ |
1493 | struct cu_partial_die_info | |
1494 | { | |
1495 | /* The compilation unit of the partial_die_info. */ | |
1496 | struct dwarf2_cu *cu; | |
1497 | /* A partial_die_info. */ | |
1498 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1499 | |
1500 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1501 | : cu (cu), | |
1502 | pdi (pdi) | |
405feb71 | 1503 | { /* Nothing. */ } |
122cf0f2 AB |
1504 | |
1505 | private: | |
1506 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1507 | }; |
1508 | ||
122cf0f2 AB |
1509 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1510 | struct dwarf2_cu *); | |
72bf9492 | 1511 | |
d521ce57 TT |
1512 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1513 | struct attribute *, struct attr_abbrev *, | |
1514 | const gdb_byte *); | |
a8329558 | 1515 | |
a1855c1d | 1516 | static unsigned int read_1_byte (bfd *, const gdb_byte *); |
c906108c | 1517 | |
a1855c1d | 1518 | static int read_1_signed_byte (bfd *, const gdb_byte *); |
c906108c | 1519 | |
a1855c1d | 1520 | static unsigned int read_2_bytes (bfd *, const gdb_byte *); |
c906108c | 1521 | |
15f18d14 AT |
1522 | /* Read the next three bytes (little-endian order) as an unsigned integer. */ |
1523 | static unsigned int read_3_bytes (bfd *, const gdb_byte *); | |
1524 | ||
a1855c1d | 1525 | static unsigned int read_4_bytes (bfd *, const gdb_byte *); |
c906108c | 1526 | |
a1855c1d | 1527 | static ULONGEST read_8_bytes (bfd *, const gdb_byte *); |
c906108c | 1528 | |
d521ce57 | 1529 | static CORE_ADDR read_address (bfd *, const gdb_byte *ptr, struct dwarf2_cu *, |
891d2f0b | 1530 | unsigned int *); |
c906108c | 1531 | |
d521ce57 | 1532 | static LONGEST read_initial_length (bfd *, const gdb_byte *, unsigned int *); |
c764a876 DE |
1533 | |
1534 | static LONGEST read_checked_initial_length_and_offset | |
d521ce57 | 1535 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1536 | unsigned int *, unsigned int *); |
613e1657 | 1537 | |
d521ce57 TT |
1538 | static LONGEST read_offset (bfd *, const gdb_byte *, |
1539 | const struct comp_unit_head *, | |
c764a876 DE |
1540 | unsigned int *); |
1541 | ||
d521ce57 | 1542 | static LONGEST read_offset_1 (bfd *, const gdb_byte *, unsigned int); |
613e1657 | 1543 | |
ed2dc618 SM |
1544 | static sect_offset read_abbrev_offset |
1545 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1546 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1547 | |
d521ce57 | 1548 | static const gdb_byte *read_n_bytes (bfd *, const gdb_byte *, unsigned int); |
c906108c | 1549 | |
d521ce57 | 1550 | static const char *read_direct_string (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1551 | |
ed2dc618 SM |
1552 | static const char *read_indirect_string |
1553 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1554 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1555 | |
ed2dc618 SM |
1556 | static const char *read_indirect_line_string |
1557 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1558 | const struct comp_unit_head *, unsigned int *); | |
36586728 | 1559 | |
ed2dc618 SM |
1560 | static const char *read_indirect_string_at_offset |
1561 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, | |
1562 | LONGEST str_offset); | |
927aa2e7 | 1563 | |
ed2dc618 SM |
1564 | static const char *read_indirect_string_from_dwz |
1565 | (struct objfile *objfile, struct dwz_file *, LONGEST); | |
c906108c | 1566 | |
d521ce57 | 1567 | static LONGEST read_signed_leb128 (bfd *, const gdb_byte *, unsigned int *); |
c906108c | 1568 | |
d521ce57 TT |
1569 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1570 | const gdb_byte *, | |
3019eac3 DE |
1571 | unsigned int *); |
1572 | ||
d521ce57 | 1573 | static const char *read_str_index (const struct die_reader_specs *reader, |
342587c4 | 1574 | ULONGEST str_index); |
3019eac3 | 1575 | |
e142c38c | 1576 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1577 | |
e142c38c DJ |
1578 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1579 | struct dwarf2_cu *); | |
c906108c | 1580 | |
348e048f | 1581 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1582 | unsigned int); |
348e048f | 1583 | |
7d45c7c3 KB |
1584 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1585 | struct dwarf2_cu *cu); | |
1586 | ||
a084a2a6 AT |
1587 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1588 | ||
05cf31d1 JB |
1589 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1590 | struct dwarf2_cu *cu); | |
1591 | ||
e142c38c | 1592 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1593 | |
e142c38c | 1594 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1595 | struct dwarf2_cu **); |
63d06c5c | 1596 | |
9c541725 | 1597 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1598 | struct dwarf2_cu *cu); |
debd256d | 1599 | |
f3f5162e | 1600 | static void dwarf_decode_lines (struct line_header *, const char *, |
c3b7b696 | 1601 | struct dwarf2_cu *, struct partial_symtab *, |
527f3840 | 1602 | CORE_ADDR, int decode_mapping); |
c906108c | 1603 | |
804d2729 TT |
1604 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1605 | const char *); | |
c906108c | 1606 | |
a14ed312 | 1607 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1608 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1609 | |
ff39bb5e | 1610 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1611 | struct dwarf2_cu *); |
c906108c | 1612 | |
ff39bb5e | 1613 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1614 | struct type *type, |
1615 | const char *name, | |
1616 | struct obstack *obstack, | |
12df843f | 1617 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1618 | const gdb_byte **bytes, |
98bfdba5 | 1619 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1620 | |
e7c27a73 | 1621 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1622 | |
b4ba55a1 JB |
1623 | static int need_gnat_info (struct dwarf2_cu *); |
1624 | ||
3e43a32a MS |
1625 | static struct type *die_descriptive_type (struct die_info *, |
1626 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1627 | |
1628 | static void set_descriptive_type (struct type *, struct die_info *, | |
1629 | struct dwarf2_cu *); | |
1630 | ||
e7c27a73 DJ |
1631 | static struct type *die_containing_type (struct die_info *, |
1632 | struct dwarf2_cu *); | |
c906108c | 1633 | |
ff39bb5e | 1634 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1635 | struct dwarf2_cu *); |
c906108c | 1636 | |
f792889a | 1637 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1638 | |
673bfd45 DE |
1639 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1640 | ||
0d5cff50 | 1641 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1642 | |
6e70227d | 1643 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1644 | const char *suffix, int physname, |
1645 | struct dwarf2_cu *cu); | |
63d06c5c | 1646 | |
e7c27a73 | 1647 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1648 | |
348e048f DE |
1649 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1650 | ||
e7c27a73 | 1651 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1652 | |
e7c27a73 | 1653 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1654 | |
96408a79 SA |
1655 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1656 | ||
71a3c369 TT |
1657 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1658 | ||
ff013f42 JK |
1659 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
1660 | struct dwarf2_cu *, struct partial_symtab *); | |
1661 | ||
3a2b436a | 1662 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1663 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1664 | enum pc_bounds_kind |
1665 | { | |
e385593e | 1666 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1667 | PC_BOUNDS_NOT_PRESENT, |
1668 | ||
e385593e JK |
1669 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1670 | were present but they do not form a valid range of PC addresses. */ | |
1671 | PC_BOUNDS_INVALID, | |
1672 | ||
3a2b436a JK |
1673 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1674 | PC_BOUNDS_RANGES, | |
1675 | ||
1676 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1677 | PC_BOUNDS_HIGH_LOW, | |
1678 | }; | |
1679 | ||
1680 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1681 | CORE_ADDR *, CORE_ADDR *, | |
1682 | struct dwarf2_cu *, | |
1683 | struct partial_symtab *); | |
c906108c | 1684 | |
fae299cd DC |
1685 | static void get_scope_pc_bounds (struct die_info *, |
1686 | CORE_ADDR *, CORE_ADDR *, | |
1687 | struct dwarf2_cu *); | |
1688 | ||
801e3a5b JB |
1689 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1690 | CORE_ADDR, struct dwarf2_cu *); | |
1691 | ||
a14ed312 | 1692 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1693 | struct dwarf2_cu *); |
c906108c | 1694 | |
a14ed312 | 1695 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1696 | struct type *, struct dwarf2_cu *); |
c906108c | 1697 | |
a14ed312 | 1698 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1699 | struct die_info *, struct type *, |
e7c27a73 | 1700 | struct dwarf2_cu *); |
c906108c | 1701 | |
a14ed312 | 1702 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1703 | struct type *, |
1704 | struct dwarf2_cu *); | |
c906108c | 1705 | |
134d01f1 | 1706 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1707 | |
e7c27a73 | 1708 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1709 | |
e7c27a73 | 1710 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1711 | |
5d7cb8df JK |
1712 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1713 | ||
804d2729 | 1714 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1715 | |
27aa8d6a SW |
1716 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1717 | ||
74921315 KS |
1718 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1719 | ||
f55ee35c JK |
1720 | static struct type *read_module_type (struct die_info *die, |
1721 | struct dwarf2_cu *cu); | |
1722 | ||
38d518c9 | 1723 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1724 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1725 | |
134d01f1 | 1726 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1727 | |
e7c27a73 | 1728 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1729 | |
6e70227d | 1730 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1731 | struct dwarf2_cu *); |
1732 | ||
bf6af496 | 1733 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1734 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1735 | struct die_info *); |
639d11d3 | 1736 | |
dee91e82 | 1737 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1738 | const gdb_byte *info_ptr, |
1739 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1740 | struct die_info *parent); |
1741 | ||
d521ce57 TT |
1742 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1743 | struct die_info **, const gdb_byte *, | |
1744 | int *, int); | |
3019eac3 | 1745 | |
d521ce57 TT |
1746 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
1747 | struct die_info **, const gdb_byte *, | |
1748 | int *); | |
93311388 | 1749 | |
e7c27a73 | 1750 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1751 | |
15d034d0 TT |
1752 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
1753 | struct obstack *); | |
71c25dea | 1754 | |
15d034d0 | 1755 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1756 | |
15d034d0 | 1757 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1758 | struct die_info *die, |
1759 | struct dwarf2_cu *cu); | |
1760 | ||
ca69b9e6 DE |
1761 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1762 | struct dwarf2_cu *cu); | |
1763 | ||
e142c38c | 1764 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1765 | struct dwarf2_cu **); |
9219021c | 1766 | |
f39c6ffd | 1767 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1768 | |
f39c6ffd | 1769 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1770 | |
a084a2a6 AT |
1771 | static const char *dwarf_unit_type_name (int unit_type); |
1772 | ||
f39c6ffd | 1773 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1774 | |
a121b7c1 | 1775 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1776 | |
f39c6ffd | 1777 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1778 | |
f9aca02d | 1779 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1780 | |
d97bc12b DE |
1781 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1782 | ||
1783 | static void dump_die_for_error (struct die_info *); | |
1784 | ||
1785 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1786 | struct die_info *); | |
c906108c | 1787 | |
d97bc12b | 1788 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1789 | |
51545339 | 1790 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1791 | struct dwarf2_cu *); |
c906108c | 1792 | |
ff39bb5e | 1793 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1794 | |
ff39bb5e | 1795 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1796 | |
348e048f | 1797 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1798 | const struct attribute *, |
348e048f DE |
1799 | struct dwarf2_cu **); |
1800 | ||
10b3939b | 1801 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1802 | const struct attribute *, |
f2f0e013 | 1803 | struct dwarf2_cu **); |
c906108c | 1804 | |
348e048f | 1805 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1806 | const struct attribute *, |
348e048f DE |
1807 | struct dwarf2_cu **); |
1808 | ||
ac9ec31b DE |
1809 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1810 | struct dwarf2_cu *); | |
1811 | ||
1812 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1813 | const struct attribute *, |
ac9ec31b DE |
1814 | struct dwarf2_cu *); |
1815 | ||
e5fe5e75 | 1816 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1817 | |
52dc124a | 1818 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1819 | |
63e43d3a PMR |
1820 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1821 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1822 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1823 | |
c906108c SS |
1824 | /* memory allocation interface */ |
1825 | ||
7b5a2f43 | 1826 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1827 | |
b60c80d6 | 1828 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1829 | |
43f3e411 | 1830 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1831 | |
6e5a29e1 | 1832 | static int attr_form_is_block (const struct attribute *); |
8e19ed76 | 1833 | |
6e5a29e1 | 1834 | static int attr_form_is_section_offset (const struct attribute *); |
3690dd37 | 1835 | |
6e5a29e1 | 1836 | static int attr_form_is_constant (const struct attribute *); |
3690dd37 | 1837 | |
6e5a29e1 | 1838 | static int attr_form_is_ref (const struct attribute *); |
7771576e | 1839 | |
8cf6f0b1 TT |
1840 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1841 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1842 | const struct attribute *attr); |
8cf6f0b1 | 1843 | |
ff39bb5e | 1844 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1845 | struct symbol *sym, |
f1e6e072 TT |
1846 | struct dwarf2_cu *cu, |
1847 | int is_block); | |
4c2df51b | 1848 | |
d521ce57 TT |
1849 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1850 | const gdb_byte *info_ptr, | |
1851 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1852 | |
72bf9492 DJ |
1853 | static hashval_t partial_die_hash (const void *item); |
1854 | ||
1855 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1856 | ||
ae038cb0 | 1857 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1858 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1859 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1860 | |
9816fde3 | 1861 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1862 | struct die_info *comp_unit_die, |
1863 | enum language pretend_language); | |
93311388 | 1864 | |
ed2dc618 | 1865 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1866 | |
dee91e82 | 1867 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1868 | |
f792889a DJ |
1869 | static struct type *set_die_type (struct die_info *, struct type *, |
1870 | struct dwarf2_cu *); | |
1c379e20 | 1871 | |
ed2dc618 | 1872 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1873 | |
ed2dc618 | 1874 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1875 | |
58f0c718 | 1876 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1877 | enum language); |
10b3939b | 1878 | |
95554aad TT |
1879 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1880 | enum language); | |
10b3939b | 1881 | |
f4dc4d17 DE |
1882 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1883 | enum language); | |
1884 | ||
10b3939b DJ |
1885 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1886 | struct dwarf2_per_cu_data *); | |
1887 | ||
ae038cb0 DJ |
1888 | static void dwarf2_mark (struct dwarf2_cu *); |
1889 | ||
1890 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1891 | ||
b64f50a1 | 1892 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1893 | struct dwarf2_per_cu_data *); |
673bfd45 | 1894 | |
f792889a | 1895 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1896 | |
95554aad TT |
1897 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1898 | enum language pretend_language); | |
1899 | ||
ed2dc618 | 1900 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1901 | |
9a49df9d AB |
1902 | static struct type *dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data *per_cu); |
1903 | static struct type *dwarf2_per_cu_addr_sized_int_type | |
1904 | (struct dwarf2_per_cu_data *per_cu, bool unsigned_p); | |
11a8b164 AB |
1905 | static struct type *dwarf2_per_cu_int_type |
1906 | (struct dwarf2_per_cu_data *per_cu, int size_in_bytes, | |
1907 | bool unsigned_p); | |
9a49df9d | 1908 | |
b303c6f6 AB |
1909 | /* Class, the destructor of which frees all allocated queue entries. This |
1910 | will only have work to do if an error was thrown while processing the | |
1911 | dwarf. If no error was thrown then the queue entries should have all | |
1912 | been processed, and freed, as we went along. */ | |
1913 | ||
1914 | class dwarf2_queue_guard | |
1915 | { | |
1916 | public: | |
1917 | dwarf2_queue_guard () = default; | |
1918 | ||
1919 | /* Free any entries remaining on the queue. There should only be | |
1920 | entries left if we hit an error while processing the dwarf. */ | |
1921 | ~dwarf2_queue_guard () | |
1922 | { | |
1923 | struct dwarf2_queue_item *item, *last; | |
1924 | ||
1925 | item = dwarf2_queue; | |
1926 | while (item) | |
1927 | { | |
1928 | /* Anything still marked queued is likely to be in an | |
1929 | inconsistent state, so discard it. */ | |
1930 | if (item->per_cu->queued) | |
1931 | { | |
1932 | if (item->per_cu->cu != NULL) | |
1933 | free_one_cached_comp_unit (item->per_cu); | |
1934 | item->per_cu->queued = 0; | |
1935 | } | |
1936 | ||
1937 | last = item; | |
1938 | item = item->next; | |
1939 | xfree (last); | |
1940 | } | |
1941 | ||
1942 | dwarf2_queue = dwarf2_queue_tail = NULL; | |
1943 | } | |
1944 | }; | |
1945 | ||
d721ba37 PA |
1946 | /* The return type of find_file_and_directory. Note, the enclosed |
1947 | string pointers are only valid while this object is valid. */ | |
1948 | ||
1949 | struct file_and_directory | |
1950 | { | |
1951 | /* The filename. This is never NULL. */ | |
1952 | const char *name; | |
1953 | ||
1954 | /* The compilation directory. NULL if not known. If we needed to | |
1955 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1956 | points directly to the DW_AT_comp_dir string attribute owned by | |
1957 | the obstack that owns the DIE. */ | |
1958 | const char *comp_dir; | |
1959 | ||
1960 | /* If we needed to build a new string for comp_dir, this is what | |
1961 | owns the storage. */ | |
1962 | std::string comp_dir_storage; | |
1963 | }; | |
1964 | ||
1965 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1966 | struct dwarf2_cu *cu); | |
9291a0cd TT |
1967 | |
1968 | static char *file_full_name (int file, struct line_header *lh, | |
1969 | const char *comp_dir); | |
1970 | ||
43988095 JK |
1971 | /* Expected enum dwarf_unit_type for read_comp_unit_head. */ |
1972 | enum class rcuh_kind { COMPILE, TYPE }; | |
1973 | ||
d521ce57 | 1974 | static const gdb_byte *read_and_check_comp_unit_head |
ed2dc618 SM |
1975 | (struct dwarf2_per_objfile* dwarf2_per_objfile, |
1976 | struct comp_unit_head *header, | |
36586728 | 1977 | struct dwarf2_section_info *section, |
d521ce57 | 1978 | struct dwarf2_section_info *abbrev_section, const gdb_byte *info_ptr, |
43988095 | 1979 | rcuh_kind section_kind); |
36586728 | 1980 | |
fd820528 | 1981 | static void init_cutu_and_read_dies |
f4dc4d17 | 1982 | (struct dwarf2_per_cu_data *this_cu, struct abbrev_table *abbrev_table, |
58f0c718 | 1983 | int use_existing_cu, int keep, bool skip_partial, |
3019eac3 DE |
1984 | die_reader_func_ftype *die_reader_func, void *data); |
1985 | ||
dee91e82 DE |
1986 | static void init_cutu_and_read_dies_simple |
1987 | (struct dwarf2_per_cu_data *this_cu, | |
1988 | die_reader_func_ftype *die_reader_func, void *data); | |
9291a0cd | 1989 | |
673bfd45 | 1990 | static htab_t allocate_signatured_type_table (struct objfile *objfile); |
1fd400ff | 1991 | |
3019eac3 DE |
1992 | static htab_t allocate_dwo_unit_table (struct objfile *objfile); |
1993 | ||
57d63ce2 | 1994 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1995 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1996 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1997 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1998 | |
ed2dc618 SM |
1999 | static struct dwp_file *get_dwp_file |
2000 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 2001 | |
3019eac3 | 2002 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 2003 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
2004 | |
2005 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 2006 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 2007 | |
89e63ee4 DE |
2008 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
2009 | ||
263db9a1 TT |
2010 | /* A unique pointer to a dwo_file. */ |
2011 | ||
51ac9db5 | 2012 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 2013 | |
ed2dc618 | 2014 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 2015 | |
1b80a9fa | 2016 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
2017 | |
2018 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
2019 | \f |
2020 | /* Various complaints about symbol reading that don't abort the process. */ | |
2021 | ||
2022 | static void | |
2023 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
2024 | { | |
b98664d3 | 2025 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
2026 | } |
2027 | ||
2028 | static void | |
2029 | dwarf2_debug_line_missing_file_complaint (void) | |
2030 | { | |
b98664d3 | 2031 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
2032 | } |
2033 | ||
2034 | static void | |
2035 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
2036 | { | |
b98664d3 | 2037 | complaint (_(".debug_line section has line " |
4390d890 DE |
2038 | "program sequence without an end")); |
2039 | } | |
2040 | ||
2041 | static void | |
2042 | dwarf2_complex_location_expr_complaint (void) | |
2043 | { | |
b98664d3 | 2044 | complaint (_("location expression too complex")); |
4390d890 DE |
2045 | } |
2046 | ||
2047 | static void | |
2048 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
2049 | int arg3) | |
2050 | { | |
b98664d3 | 2051 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
2052 | arg1, arg2, arg3); |
2053 | } | |
2054 | ||
2055 | static void | |
2056 | dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info *section) | |
2057 | { | |
b98664d3 | 2058 | complaint (_("debug info runs off end of %s section" |
4390d890 | 2059 | " [in module %s]"), |
a32a8923 DE |
2060 | get_section_name (section), |
2061 | get_section_file_name (section)); | |
4390d890 | 2062 | } |
1b80a9fa | 2063 | |
4390d890 DE |
2064 | static void |
2065 | dwarf2_macro_malformed_definition_complaint (const char *arg1) | |
2066 | { | |
b98664d3 | 2067 | complaint (_("macro debug info contains a " |
4390d890 DE |
2068 | "malformed macro definition:\n`%s'"), |
2069 | arg1); | |
2070 | } | |
2071 | ||
2072 | static void | |
2073 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
2074 | { | |
b98664d3 | 2075 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
2076 | arg1, arg2); |
2077 | } | |
527f3840 JK |
2078 | |
2079 | /* Hash function for line_header_hash. */ | |
2080 | ||
2081 | static hashval_t | |
2082 | line_header_hash (const struct line_header *ofs) | |
2083 | { | |
9c541725 | 2084 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
2085 | } |
2086 | ||
2087 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
2088 | ||
2089 | static hashval_t | |
2090 | line_header_hash_voidp (const void *item) | |
2091 | { | |
9a3c8263 | 2092 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
2093 | |
2094 | return line_header_hash (ofs); | |
2095 | } | |
2096 | ||
2097 | /* Equality function for line_header_hash. */ | |
2098 | ||
2099 | static int | |
2100 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
2101 | { | |
9a3c8263 SM |
2102 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
2103 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 2104 | |
9c541725 | 2105 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
2106 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
2107 | } | |
2108 | ||
4390d890 | 2109 | \f |
9291a0cd | 2110 | |
31aa7e4e JB |
2111 | /* Read the given attribute value as an address, taking the attribute's |
2112 | form into account. */ | |
2113 | ||
2114 | static CORE_ADDR | |
2115 | attr_value_as_address (struct attribute *attr) | |
2116 | { | |
2117 | CORE_ADDR addr; | |
2118 | ||
336d760d AT |
2119 | if (attr->form != DW_FORM_addr && attr->form != DW_FORM_addrx |
2120 | && attr->form != DW_FORM_GNU_addr_index) | |
31aa7e4e JB |
2121 | { |
2122 | /* Aside from a few clearly defined exceptions, attributes that | |
2123 | contain an address must always be in DW_FORM_addr form. | |
2124 | Unfortunately, some compilers happen to be violating this | |
2125 | requirement by encoding addresses using other forms, such | |
2126 | as DW_FORM_data4 for example. For those broken compilers, | |
2127 | we try to do our best, without any guarantee of success, | |
2128 | to interpret the address correctly. It would also be nice | |
2129 | to generate a complaint, but that would require us to maintain | |
2130 | a list of legitimate cases where a non-address form is allowed, | |
2131 | as well as update callers to pass in at least the CU's DWARF | |
2132 | version. This is more overhead than what we're willing to | |
2133 | expand for a pretty rare case. */ | |
2134 | addr = DW_UNSND (attr); | |
2135 | } | |
2136 | else | |
2137 | addr = DW_ADDR (attr); | |
2138 | ||
2139 | return addr; | |
2140 | } | |
2141 | ||
330cdd98 PA |
2142 | /* See declaration. */ |
2143 | ||
2144 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
4b610737 TT |
2145 | const dwarf2_debug_sections *names, |
2146 | bool can_copy_) | |
2147 | : objfile (objfile_), | |
2148 | can_copy (can_copy_) | |
330cdd98 PA |
2149 | { |
2150 | if (names == NULL) | |
2151 | names = &dwarf2_elf_names; | |
2152 | ||
2153 | bfd *obfd = objfile->obfd; | |
2154 | ||
2155 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
2156 | locate_sections (obfd, sec, *names); | |
2157 | } | |
2158 | ||
2159 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
2160 | { | |
2161 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
2162 | free_cached_comp_units (); | |
2163 | ||
2164 | if (quick_file_names_table) | |
2165 | htab_delete (quick_file_names_table); | |
2166 | ||
2167 | if (line_header_hash) | |
2168 | htab_delete (line_header_hash); | |
2169 | ||
b76e467d | 2170 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
ae640021 | 2171 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 2172 | |
b2bdb8cf | 2173 | for (signatured_type *sig_type : all_type_units) |
ae640021 | 2174 | sig_type->per_cu.imported_symtabs_free (); |
fc8e7e75 | 2175 | |
330cdd98 PA |
2176 | /* Everything else should be on the objfile obstack. */ |
2177 | } | |
2178 | ||
2179 | /* See declaration. */ | |
2180 | ||
2181 | void | |
2182 | dwarf2_per_objfile::free_cached_comp_units () | |
2183 | { | |
2184 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
2185 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
2186 | while (per_cu != NULL) | |
2187 | { | |
2188 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
2189 | ||
fcd3b13d | 2190 | delete per_cu->cu; |
330cdd98 PA |
2191 | *last_chain = next_cu; |
2192 | per_cu = next_cu; | |
2193 | } | |
2194 | } | |
2195 | ||
11ed8cad TT |
2196 | /* A helper class that calls free_cached_comp_units on |
2197 | destruction. */ | |
2198 | ||
2199 | class free_cached_comp_units | |
2200 | { | |
2201 | public: | |
2202 | ||
2203 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
2204 | : m_per_objfile (per_objfile) | |
2205 | { | |
2206 | } | |
2207 | ||
2208 | ~free_cached_comp_units () | |
2209 | { | |
2210 | m_per_objfile->free_cached_comp_units (); | |
2211 | } | |
2212 | ||
2213 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
2214 | ||
2215 | private: | |
2216 | ||
2217 | dwarf2_per_objfile *m_per_objfile; | |
2218 | }; | |
2219 | ||
c906108c | 2220 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
2221 | information and return true if we have enough to do something. |
2222 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
2223 | ELF names are used. CAN_COPY is true for formats where symbol |
2224 | interposition is possible and so symbol values must follow copy | |
2225 | relocation rules. */ | |
c906108c SS |
2226 | |
2227 | int | |
251d32d9 | 2228 | dwarf2_has_info (struct objfile *objfile, |
4b610737 TT |
2229 | const struct dwarf2_debug_sections *names, |
2230 | bool can_copy) | |
c906108c | 2231 | { |
97cbe998 SDJ |
2232 | if (objfile->flags & OBJF_READNEVER) |
2233 | return 0; | |
2234 | ||
ed2dc618 SM |
2235 | struct dwarf2_per_objfile *dwarf2_per_objfile |
2236 | = get_dwarf2_per_objfile (objfile); | |
2237 | ||
2238 | if (dwarf2_per_objfile == NULL) | |
5bfd760d | 2239 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
4b610737 TT |
2240 | names, |
2241 | can_copy); | |
5bfd760d | 2242 | |
73869dc2 | 2243 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 2244 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 2245 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 2246 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
2247 | } |
2248 | ||
2249 | /* Return the containing section of virtual section SECTION. */ | |
2250 | ||
2251 | static struct dwarf2_section_info * | |
2252 | get_containing_section (const struct dwarf2_section_info *section) | |
2253 | { | |
2254 | gdb_assert (section->is_virtual); | |
2255 | return section->s.containing_section; | |
c906108c SS |
2256 | } |
2257 | ||
a32a8923 DE |
2258 | /* Return the bfd owner of SECTION. */ |
2259 | ||
2260 | static struct bfd * | |
2261 | get_section_bfd_owner (const struct dwarf2_section_info *section) | |
2262 | { | |
73869dc2 DE |
2263 | if (section->is_virtual) |
2264 | { | |
2265 | section = get_containing_section (section); | |
2266 | gdb_assert (!section->is_virtual); | |
2267 | } | |
049412e3 | 2268 | return section->s.section->owner; |
a32a8923 DE |
2269 | } |
2270 | ||
2271 | /* Return the bfd section of SECTION. | |
2272 | Returns NULL if the section is not present. */ | |
2273 | ||
2274 | static asection * | |
2275 | get_section_bfd_section (const struct dwarf2_section_info *section) | |
2276 | { | |
73869dc2 DE |
2277 | if (section->is_virtual) |
2278 | { | |
2279 | section = get_containing_section (section); | |
2280 | gdb_assert (!section->is_virtual); | |
2281 | } | |
049412e3 | 2282 | return section->s.section; |
a32a8923 DE |
2283 | } |
2284 | ||
2285 | /* Return the name of SECTION. */ | |
2286 | ||
2287 | static const char * | |
2288 | get_section_name (const struct dwarf2_section_info *section) | |
2289 | { | |
2290 | asection *sectp = get_section_bfd_section (section); | |
2291 | ||
2292 | gdb_assert (sectp != NULL); | |
fd361982 | 2293 | return bfd_section_name (sectp); |
a32a8923 DE |
2294 | } |
2295 | ||
2296 | /* Return the name of the file SECTION is in. */ | |
2297 | ||
2298 | static const char * | |
2299 | get_section_file_name (const struct dwarf2_section_info *section) | |
2300 | { | |
2301 | bfd *abfd = get_section_bfd_owner (section); | |
2302 | ||
2303 | return bfd_get_filename (abfd); | |
2304 | } | |
2305 | ||
2306 | /* Return the id of SECTION. | |
2307 | Returns 0 if SECTION doesn't exist. */ | |
2308 | ||
2309 | static int | |
2310 | get_section_id (const struct dwarf2_section_info *section) | |
2311 | { | |
2312 | asection *sectp = get_section_bfd_section (section); | |
2313 | ||
2314 | if (sectp == NULL) | |
2315 | return 0; | |
2316 | return sectp->id; | |
2317 | } | |
2318 | ||
2319 | /* Return the flags of SECTION. | |
73869dc2 | 2320 | SECTION (or containing section if this is a virtual section) must exist. */ |
a32a8923 DE |
2321 | |
2322 | static int | |
2323 | get_section_flags (const struct dwarf2_section_info *section) | |
2324 | { | |
2325 | asection *sectp = get_section_bfd_section (section); | |
2326 | ||
2327 | gdb_assert (sectp != NULL); | |
fd361982 | 2328 | return bfd_section_flags (sectp); |
a32a8923 DE |
2329 | } |
2330 | ||
251d32d9 TG |
2331 | /* When loading sections, we look either for uncompressed section or for |
2332 | compressed section names. */ | |
233a11ab CS |
2333 | |
2334 | static int | |
251d32d9 TG |
2335 | section_is_p (const char *section_name, |
2336 | const struct dwarf2_section_names *names) | |
233a11ab | 2337 | { |
251d32d9 TG |
2338 | if (names->normal != NULL |
2339 | && strcmp (section_name, names->normal) == 0) | |
2340 | return 1; | |
2341 | if (names->compressed != NULL | |
2342 | && strcmp (section_name, names->compressed) == 0) | |
2343 | return 1; | |
2344 | return 0; | |
233a11ab CS |
2345 | } |
2346 | ||
330cdd98 | 2347 | /* See declaration. */ |
c906108c | 2348 | |
330cdd98 PA |
2349 | void |
2350 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
2351 | const dwarf2_debug_sections &names) | |
c906108c | 2352 | { |
fd361982 | 2353 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 2354 | |
dc7650b8 JK |
2355 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
2356 | { | |
2357 | } | |
950b7495 KS |
2358 | else if (elf_section_data (sectp)->this_hdr.sh_size |
2359 | > bfd_get_file_size (abfd)) | |
2360 | { | |
2361 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
2362 | warning (_("Discarding section %s which has a section size (%s" | |
2363 | ") larger than the file size [in module %s]"), | |
2364 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
2365 | bfd_get_filename (abfd)); | |
2366 | } | |
330cdd98 | 2367 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 2368 | { |
330cdd98 | 2369 | this->info.s.section = sectp; |
fd361982 | 2370 | this->info.size = bfd_section_size (sectp); |
c906108c | 2371 | } |
330cdd98 | 2372 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 2373 | { |
330cdd98 | 2374 | this->abbrev.s.section = sectp; |
fd361982 | 2375 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 2376 | } |
330cdd98 | 2377 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 2378 | { |
330cdd98 | 2379 | this->line.s.section = sectp; |
fd361982 | 2380 | this->line.size = bfd_section_size (sectp); |
c906108c | 2381 | } |
330cdd98 | 2382 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 2383 | { |
330cdd98 | 2384 | this->loc.s.section = sectp; |
fd361982 | 2385 | this->loc.size = bfd_section_size (sectp); |
c906108c | 2386 | } |
330cdd98 | 2387 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 2388 | { |
330cdd98 | 2389 | this->loclists.s.section = sectp; |
fd361982 | 2390 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 2391 | } |
330cdd98 | 2392 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 2393 | { |
330cdd98 | 2394 | this->macinfo.s.section = sectp; |
fd361982 | 2395 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 2396 | } |
330cdd98 | 2397 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 2398 | { |
330cdd98 | 2399 | this->macro.s.section = sectp; |
fd361982 | 2400 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 2401 | } |
330cdd98 | 2402 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 2403 | { |
330cdd98 | 2404 | this->str.s.section = sectp; |
fd361982 | 2405 | this->str.size = bfd_section_size (sectp); |
c906108c | 2406 | } |
330cdd98 | 2407 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 2408 | { |
330cdd98 | 2409 | this->line_str.s.section = sectp; |
fd361982 | 2410 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 2411 | } |
330cdd98 | 2412 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 2413 | { |
330cdd98 | 2414 | this->addr.s.section = sectp; |
fd361982 | 2415 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 2416 | } |
330cdd98 | 2417 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 2418 | { |
330cdd98 | 2419 | this->frame.s.section = sectp; |
fd361982 | 2420 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 2421 | } |
330cdd98 | 2422 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 2423 | { |
330cdd98 | 2424 | this->eh_frame.s.section = sectp; |
fd361982 | 2425 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 2426 | } |
330cdd98 | 2427 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 2428 | { |
330cdd98 | 2429 | this->ranges.s.section = sectp; |
fd361982 | 2430 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 2431 | } |
330cdd98 | 2432 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 2433 | { |
330cdd98 | 2434 | this->rnglists.s.section = sectp; |
fd361982 | 2435 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 2436 | } |
330cdd98 | 2437 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 2438 | { |
8b70b953 TT |
2439 | struct dwarf2_section_info type_section; |
2440 | ||
2441 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 2442 | type_section.s.section = sectp; |
fd361982 | 2443 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 2444 | |
fd5866f6 | 2445 | this->types.push_back (type_section); |
348e048f | 2446 | } |
330cdd98 | 2447 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 2448 | { |
330cdd98 | 2449 | this->gdb_index.s.section = sectp; |
fd361982 | 2450 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 2451 | } |
927aa2e7 JK |
2452 | else if (section_is_p (sectp->name, &names.debug_names)) |
2453 | { | |
2454 | this->debug_names.s.section = sectp; | |
fd361982 | 2455 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 JK |
2456 | } |
2457 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
2458 | { | |
2459 | this->debug_aranges.s.section = sectp; | |
fd361982 | 2460 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 2461 | } |
dce234bc | 2462 | |
fd361982 AM |
2463 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
2464 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 2465 | this->has_section_at_zero = true; |
c906108c SS |
2466 | } |
2467 | ||
fceca515 DE |
2468 | /* A helper function that decides whether a section is empty, |
2469 | or not present. */ | |
9e0ac564 TT |
2470 | |
2471 | static int | |
19ac8c2e | 2472 | dwarf2_section_empty_p (const struct dwarf2_section_info *section) |
9e0ac564 | 2473 | { |
73869dc2 DE |
2474 | if (section->is_virtual) |
2475 | return section->size == 0; | |
049412e3 | 2476 | return section->s.section == NULL || section->size == 0; |
9e0ac564 TT |
2477 | } |
2478 | ||
cd4fb1b2 | 2479 | /* See dwarf2read.h. */ |
c906108c | 2480 | |
cd4fb1b2 SM |
2481 | void |
2482 | dwarf2_read_section (struct objfile *objfile, dwarf2_section_info *info) | |
c906108c | 2483 | { |
a32a8923 | 2484 | asection *sectp; |
3019eac3 | 2485 | bfd *abfd; |
dce234bc | 2486 | gdb_byte *buf, *retbuf; |
c906108c | 2487 | |
be391dca TT |
2488 | if (info->readin) |
2489 | return; | |
dce234bc | 2490 | info->buffer = NULL; |
dc4ccb6f | 2491 | info->readin = true; |
188dd5d6 | 2492 | |
9e0ac564 | 2493 | if (dwarf2_section_empty_p (info)) |
dce234bc | 2494 | return; |
c906108c | 2495 | |
a32a8923 | 2496 | sectp = get_section_bfd_section (info); |
3019eac3 | 2497 | |
73869dc2 DE |
2498 | /* If this is a virtual section we need to read in the real one first. */ |
2499 | if (info->is_virtual) | |
2500 | { | |
2501 | struct dwarf2_section_info *containing_section = | |
2502 | get_containing_section (info); | |
2503 | ||
2504 | gdb_assert (sectp != NULL); | |
2505 | if ((sectp->flags & SEC_RELOC) != 0) | |
2506 | { | |
2507 | error (_("Dwarf Error: DWP format V2 with relocations is not" | |
2508 | " supported in section %s [in module %s]"), | |
2509 | get_section_name (info), get_section_file_name (info)); | |
2510 | } | |
2511 | dwarf2_read_section (objfile, containing_section); | |
2512 | /* Other code should have already caught virtual sections that don't | |
2513 | fit. */ | |
2514 | gdb_assert (info->virtual_offset + info->size | |
2515 | <= containing_section->size); | |
2516 | /* If the real section is empty or there was a problem reading the | |
2517 | section we shouldn't get here. */ | |
2518 | gdb_assert (containing_section->buffer != NULL); | |
2519 | info->buffer = containing_section->buffer + info->virtual_offset; | |
2520 | return; | |
2521 | } | |
2522 | ||
4bf44c1c TT |
2523 | /* If the section has relocations, we must read it ourselves. |
2524 | Otherwise we attach it to the BFD. */ | |
2525 | if ((sectp->flags & SEC_RELOC) == 0) | |
dce234bc | 2526 | { |
d521ce57 | 2527 | info->buffer = gdb_bfd_map_section (sectp, &info->size); |
4bf44c1c | 2528 | return; |
dce234bc | 2529 | } |
dce234bc | 2530 | |
224c3ddb | 2531 | buf = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, info->size); |
4bf44c1c | 2532 | info->buffer = buf; |
dce234bc PP |
2533 | |
2534 | /* When debugging .o files, we may need to apply relocations; see | |
2535 | http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html . | |
2536 | We never compress sections in .o files, so we only need to | |
2537 | try this when the section is not compressed. */ | |
ac8035ab | 2538 | retbuf = symfile_relocate_debug_section (objfile, sectp, buf); |
dce234bc PP |
2539 | if (retbuf != NULL) |
2540 | { | |
2541 | info->buffer = retbuf; | |
2542 | return; | |
2543 | } | |
2544 | ||
a32a8923 DE |
2545 | abfd = get_section_bfd_owner (info); |
2546 | gdb_assert (abfd != NULL); | |
2547 | ||
dce234bc PP |
2548 | if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0 |
2549 | || bfd_bread (buf, info->size, abfd) != info->size) | |
19ac8c2e DE |
2550 | { |
2551 | error (_("Dwarf Error: Can't read DWARF data" | |
2552 | " in section %s [in module %s]"), | |
fd361982 | 2553 | bfd_section_name (sectp), bfd_get_filename (abfd)); |
19ac8c2e | 2554 | } |
dce234bc PP |
2555 | } |
2556 | ||
9e0ac564 TT |
2557 | /* A helper function that returns the size of a section in a safe way. |
2558 | If you are positive that the section has been read before using the | |
2559 | size, then it is safe to refer to the dwarf2_section_info object's | |
2560 | "size" field directly. In other cases, you must call this | |
2561 | function, because for compressed sections the size field is not set | |
2562 | correctly until the section has been read. */ | |
2563 | ||
2564 | static bfd_size_type | |
2565 | dwarf2_section_size (struct objfile *objfile, | |
2566 | struct dwarf2_section_info *info) | |
2567 | { | |
2568 | if (!info->readin) | |
2569 | dwarf2_read_section (objfile, info); | |
2570 | return info->size; | |
2571 | } | |
2572 | ||
dce234bc | 2573 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 2574 | SECTION_NAME. */ |
af34e669 | 2575 | |
dce234bc | 2576 | void |
3017a003 TG |
2577 | dwarf2_get_section_info (struct objfile *objfile, |
2578 | enum dwarf2_section_enum sect, | |
d521ce57 | 2579 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
2580 | bfd_size_type *sizep) |
2581 | { | |
5bfd760d | 2582 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 2583 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2584 | |
2585 | /* We may see an objfile without any DWARF, in which case we just | |
2586 | return nothing. */ | |
2587 | if (data == NULL) | |
2588 | { | |
2589 | *sectp = NULL; | |
2590 | *bufp = NULL; | |
2591 | *sizep = 0; | |
2592 | return; | |
2593 | } | |
3017a003 TG |
2594 | switch (sect) |
2595 | { | |
2596 | case DWARF2_DEBUG_FRAME: | |
2597 | info = &data->frame; | |
2598 | break; | |
2599 | case DWARF2_EH_FRAME: | |
2600 | info = &data->eh_frame; | |
2601 | break; | |
2602 | default: | |
2603 | gdb_assert_not_reached ("unexpected section"); | |
2604 | } | |
dce234bc | 2605 | |
9e0ac564 | 2606 | dwarf2_read_section (objfile, info); |
dce234bc | 2607 | |
a32a8923 | 2608 | *sectp = get_section_bfd_section (info); |
dce234bc PP |
2609 | *bufp = info->buffer; |
2610 | *sizep = info->size; | |
2611 | } | |
2612 | ||
36586728 TT |
2613 | /* A helper function to find the sections for a .dwz file. */ |
2614 | ||
2615 | static void | |
2616 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2617 | { | |
9a3c8263 | 2618 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2619 | |
2620 | /* Note that we only support the standard ELF names, because .dwz | |
2621 | is ELF-only (at the time of writing). */ | |
2622 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2623 | { | |
049412e3 | 2624 | dwz_file->abbrev.s.section = sectp; |
fd361982 | 2625 | dwz_file->abbrev.size = bfd_section_size (sectp); |
36586728 TT |
2626 | } |
2627 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2628 | { | |
049412e3 | 2629 | dwz_file->info.s.section = sectp; |
fd361982 | 2630 | dwz_file->info.size = bfd_section_size (sectp); |
36586728 TT |
2631 | } |
2632 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2633 | { | |
049412e3 | 2634 | dwz_file->str.s.section = sectp; |
fd361982 | 2635 | dwz_file->str.size = bfd_section_size (sectp); |
36586728 TT |
2636 | } |
2637 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2638 | { | |
049412e3 | 2639 | dwz_file->line.s.section = sectp; |
fd361982 | 2640 | dwz_file->line.size = bfd_section_size (sectp); |
36586728 TT |
2641 | } |
2642 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2643 | { | |
049412e3 | 2644 | dwz_file->macro.s.section = sectp; |
fd361982 | 2645 | dwz_file->macro.size = bfd_section_size (sectp); |
36586728 | 2646 | } |
2ec9a5e0 TT |
2647 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2648 | { | |
049412e3 | 2649 | dwz_file->gdb_index.s.section = sectp; |
fd361982 | 2650 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
2ec9a5e0 | 2651 | } |
927aa2e7 JK |
2652 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2653 | { | |
2654 | dwz_file->debug_names.s.section = sectp; | |
fd361982 | 2655 | dwz_file->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 2656 | } |
36586728 TT |
2657 | } |
2658 | ||
c4973306 | 2659 | /* See dwarf2read.h. */ |
36586728 | 2660 | |
c4973306 | 2661 | struct dwz_file * |
ed2dc618 | 2662 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2663 | { |
36586728 | 2664 | const char *filename; |
acd13123 | 2665 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2666 | size_t buildid_len; |
2667 | bfd_byte *buildid; | |
36586728 TT |
2668 | |
2669 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2670 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2671 | |
4db1a1dc | 2672 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2673 | gdb::unique_xmalloc_ptr<char> data |
2674 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2675 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2676 | if (data == NULL) |
2677 | { | |
2678 | if (bfd_get_error () == bfd_error_no_error) | |
2679 | return NULL; | |
2680 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2681 | bfd_errmsg (bfd_get_error ())); | |
2682 | } | |
791afaa2 TT |
2683 | |
2684 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2685 | |
acd13123 TT |
2686 | buildid_len = (size_t) buildid_len_arg; |
2687 | ||
791afaa2 | 2688 | filename = data.get (); |
d721ba37 PA |
2689 | |
2690 | std::string abs_storage; | |
36586728 TT |
2691 | if (!IS_ABSOLUTE_PATH (filename)) |
2692 | { | |
14278e1f TT |
2693 | gdb::unique_xmalloc_ptr<char> abs |
2694 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2695 | |
14278e1f | 2696 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2697 | filename = abs_storage.c_str (); |
36586728 TT |
2698 | } |
2699 | ||
dc294be5 TT |
2700 | /* First try the file name given in the section. If that doesn't |
2701 | work, try to use the build-id instead. */ | |
192b62ce | 2702 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2703 | if (dwz_bfd != NULL) |
36586728 | 2704 | { |
192b62ce | 2705 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2706 | dwz_bfd.reset (nullptr); |
36586728 TT |
2707 | } |
2708 | ||
dc294be5 TT |
2709 | if (dwz_bfd == NULL) |
2710 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2711 | ||
2712 | if (dwz_bfd == NULL) | |
2713 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2714 | objfile_name (dwarf2_per_objfile->objfile)); | |
2715 | ||
7ff8cb8c TT |
2716 | std::unique_ptr<struct dwz_file> result |
2717 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2718 | |
7ff8cb8c TT |
2719 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2720 | result.get ()); | |
36586728 | 2721 | |
7ff8cb8c TT |
2722 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2723 | result->dwz_bfd.get ()); | |
2724 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2725 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2726 | } |
9291a0cd | 2727 | \f |
7b9f3c50 DE |
2728 | /* DWARF quick_symbols_functions support. */ |
2729 | ||
2730 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2731 | unique line tables, so we maintain a separate table of all .debug_line | |
2732 | derived entries to support the sharing. | |
2733 | All the quick functions need is the list of file names. We discard the | |
2734 | line_header when we're done and don't need to record it here. */ | |
2735 | struct quick_file_names | |
2736 | { | |
094b34ac DE |
2737 | /* The data used to construct the hash key. */ |
2738 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2739 | |
2740 | /* The number of entries in file_names, real_names. */ | |
2741 | unsigned int num_file_names; | |
2742 | ||
2743 | /* The file names from the line table, after being run through | |
2744 | file_full_name. */ | |
2745 | const char **file_names; | |
2746 | ||
2747 | /* The file names from the line table after being run through | |
2748 | gdb_realpath. These are computed lazily. */ | |
2749 | const char **real_names; | |
2750 | }; | |
2751 | ||
2752 | /* When using the index (and thus not using psymtabs), each CU has an | |
2753 | object of this type. This is used to hold information needed by | |
2754 | the various "quick" methods. */ | |
2755 | struct dwarf2_per_cu_quick_data | |
2756 | { | |
2757 | /* The file table. This can be NULL if there was no file table | |
2758 | or it's currently not read in. | |
2759 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2760 | struct quick_file_names *file_names; | |
2761 | ||
2762 | /* The corresponding symbol table. This is NULL if symbols for this | |
2763 | CU have not yet been read. */ | |
43f3e411 | 2764 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2765 | |
2766 | /* A temporary mark bit used when iterating over all CUs in | |
2767 | expand_symtabs_matching. */ | |
2768 | unsigned int mark : 1; | |
2769 | ||
2770 | /* True if we've tried to read the file table and found there isn't one. | |
2771 | There will be no point in trying to read it again next time. */ | |
2772 | unsigned int no_file_data : 1; | |
2773 | }; | |
2774 | ||
094b34ac DE |
2775 | /* Utility hash function for a stmt_list_hash. */ |
2776 | ||
2777 | static hashval_t | |
2778 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2779 | { | |
2780 | hashval_t v = 0; | |
2781 | ||
2782 | if (stmt_list_hash->dwo_unit != NULL) | |
2783 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2784 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2785 | return v; |
2786 | } | |
2787 | ||
2788 | /* Utility equality function for a stmt_list_hash. */ | |
2789 | ||
2790 | static int | |
2791 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2792 | const struct stmt_list_hash *rhs) | |
2793 | { | |
2794 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2795 | return 0; | |
2796 | if (lhs->dwo_unit != NULL | |
2797 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2798 | return 0; | |
2799 | ||
9c541725 | 2800 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2801 | } |
2802 | ||
7b9f3c50 DE |
2803 | /* Hash function for a quick_file_names. */ |
2804 | ||
2805 | static hashval_t | |
2806 | hash_file_name_entry (const void *e) | |
2807 | { | |
9a3c8263 SM |
2808 | const struct quick_file_names *file_data |
2809 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2810 | |
094b34ac | 2811 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2812 | } |
2813 | ||
2814 | /* Equality function for a quick_file_names. */ | |
2815 | ||
2816 | static int | |
2817 | eq_file_name_entry (const void *a, const void *b) | |
2818 | { | |
9a3c8263 SM |
2819 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2820 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2821 | |
094b34ac | 2822 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2823 | } |
2824 | ||
2825 | /* Delete function for a quick_file_names. */ | |
2826 | ||
2827 | static void | |
2828 | delete_file_name_entry (void *e) | |
2829 | { | |
9a3c8263 | 2830 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2831 | int i; |
2832 | ||
2833 | for (i = 0; i < file_data->num_file_names; ++i) | |
2834 | { | |
2835 | xfree ((void*) file_data->file_names[i]); | |
2836 | if (file_data->real_names) | |
2837 | xfree ((void*) file_data->real_names[i]); | |
2838 | } | |
2839 | ||
2840 | /* The space for the struct itself lives on objfile_obstack, | |
2841 | so we don't free it here. */ | |
2842 | } | |
2843 | ||
2844 | /* Create a quick_file_names hash table. */ | |
2845 | ||
2846 | static htab_t | |
2847 | create_quick_file_names_table (unsigned int nr_initial_entries) | |
2848 | { | |
2849 | return htab_create_alloc (nr_initial_entries, | |
2850 | hash_file_name_entry, eq_file_name_entry, | |
2851 | delete_file_name_entry, xcalloc, xfree); | |
2852 | } | |
9291a0cd | 2853 | |
918dd910 JK |
2854 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2855 | have to be created afterwards. You should call age_cached_comp_units after | |
2856 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2857 | ||
2858 | static void | |
58f0c718 | 2859 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2860 | { |
3019eac3 | 2861 | if (per_cu->is_debug_types) |
e5fe5e75 | 2862 | load_full_type_unit (per_cu); |
918dd910 | 2863 | else |
58f0c718 | 2864 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2865 | |
cc12ce38 DE |
2866 | if (per_cu->cu == NULL) |
2867 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2868 | |
2869 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2870 | } |
2871 | ||
a0f42c21 | 2872 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2873 | |
9291a0cd | 2874 | static void |
58f0c718 | 2875 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2876 | { |
ed2dc618 | 2877 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2878 | |
f4dc4d17 DE |
2879 | /* Skip type_unit_groups, reading the type units they contain |
2880 | is handled elsewhere. */ | |
2881 | if (IS_TYPE_UNIT_GROUP (per_cu)) | |
2882 | return; | |
2883 | ||
b303c6f6 AB |
2884 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2885 | the queue. After this point we're guaranteed to leave this function | |
2886 | with the dwarf queue empty. */ | |
2887 | dwarf2_queue_guard q_guard; | |
9291a0cd | 2888 | |
95554aad | 2889 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2890 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2891 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2892 | { | |
2893 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2894 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2895 | |
2896 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2897 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2898 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2899 | if (!per_cu->is_debug_types | |
cc12ce38 | 2900 | && per_cu->cu != NULL |
89e63ee4 DE |
2901 | && per_cu->cu->dwo_unit != NULL |
2902 | && dwarf2_per_objfile->index_table != NULL | |
2903 | && dwarf2_per_objfile->index_table->version <= 7 | |
2904 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2905 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2906 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2907 | } |
9291a0cd | 2908 | |
ed2dc618 | 2909 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2910 | |
2911 | /* Age the cache, releasing compilation units that have not | |
2912 | been used recently. */ | |
ed2dc618 | 2913 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2914 | } |
2915 | ||
2916 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2917 | the objfile from which this CU came. Returns the resulting symbol | |
2918 | table. */ | |
2fdf6df6 | 2919 | |
43f3e411 | 2920 | static struct compunit_symtab * |
58f0c718 | 2921 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2922 | { |
ed2dc618 SM |
2923 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2924 | ||
95554aad | 2925 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2926 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2927 | { |
11ed8cad | 2928 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2929 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2930 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2931 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2932 | } |
f194fefb | 2933 | |
43f3e411 | 2934 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2935 | } |
2936 | ||
ff4c9fec | 2937 | /* See declaration. */ |
f4dc4d17 | 2938 | |
ff4c9fec SM |
2939 | dwarf2_per_cu_data * |
2940 | dwarf2_per_objfile::get_cutu (int index) | |
2941 | { | |
b76e467d | 2942 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2943 | { |
b76e467d | 2944 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2945 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2946 | return &this->all_type_units[index]->per_cu; |
2947 | } | |
f4dc4d17 | 2948 | |
ff4c9fec SM |
2949 | return this->all_comp_units[index]; |
2950 | } | |
f4dc4d17 | 2951 | |
ff4c9fec | 2952 | /* See declaration. */ |
2fdf6df6 | 2953 | |
ff4c9fec SM |
2954 | dwarf2_per_cu_data * |
2955 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2956 | { |
b76e467d | 2957 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2958 | |
ff4c9fec | 2959 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2960 | } |
2961 | ||
ff4c9fec | 2962 | /* See declaration. */ |
f4dc4d17 | 2963 | |
ff4c9fec SM |
2964 | signatured_type * |
2965 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2966 | { |
b2bdb8cf | 2967 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2968 | |
ff4c9fec | 2969 | return this->all_type_units[index]; |
1fd400ff TT |
2970 | } |
2971 | ||
4b514bc8 JK |
2972 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2973 | objfile_obstack, and constructed with the specified field | |
2974 | values. */ | |
2975 | ||
2976 | static dwarf2_per_cu_data * | |
ed2dc618 | 2977 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2978 | struct dwarf2_section_info *section, |
2979 | int is_dwz, | |
2980 | sect_offset sect_off, ULONGEST length) | |
2981 | { | |
ed2dc618 | 2982 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2983 | dwarf2_per_cu_data *the_cu |
2984 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2985 | struct dwarf2_per_cu_data); | |
2986 | the_cu->sect_off = sect_off; | |
2987 | the_cu->length = length; | |
e3b94546 | 2988 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2989 | the_cu->section = section; |
2990 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2991 | struct dwarf2_per_cu_quick_data); | |
2992 | the_cu->is_dwz = is_dwz; | |
2993 | return the_cu; | |
2994 | } | |
2995 | ||
2ec9a5e0 TT |
2996 | /* A helper for create_cus_from_index that handles a given list of |
2997 | CUs. */ | |
2fdf6df6 | 2998 | |
74a0d9f6 | 2999 | static void |
12359b5e | 3000 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
3001 | const gdb_byte *cu_list, offset_type n_elements, |
3002 | struct dwarf2_section_info *section, | |
b76e467d | 3003 | int is_dwz) |
9291a0cd | 3004 | { |
12359b5e | 3005 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 3006 | { |
74a0d9f6 | 3007 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3008 | |
3009 | sect_offset sect_off | |
3010 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
3011 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
3012 | cu_list += 2 * 8; |
3013 | ||
b76e467d | 3014 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
3015 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
3016 | sect_off, length); | |
b76e467d | 3017 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 3018 | } |
9291a0cd TT |
3019 | } |
3020 | ||
2ec9a5e0 | 3021 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 3022 | the CU objects for this objfile. */ |
2ec9a5e0 | 3023 | |
74a0d9f6 | 3024 | static void |
12359b5e | 3025 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
3026 | const gdb_byte *cu_list, offset_type cu_list_elements, |
3027 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
3028 | { | |
b76e467d SM |
3029 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
3030 | dwarf2_per_objfile->all_comp_units.reserve | |
3031 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 3032 | |
12359b5e | 3033 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 3034 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
3035 | |
3036 | if (dwz_elements == 0) | |
74a0d9f6 | 3037 | return; |
2ec9a5e0 | 3038 | |
12359b5e SM |
3039 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
3040 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 3041 | &dwz->info, 1); |
2ec9a5e0 TT |
3042 | } |
3043 | ||
1fd400ff | 3044 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 3045 | |
74a0d9f6 | 3046 | static void |
12359b5e SM |
3047 | create_signatured_type_table_from_index |
3048 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3049 | struct dwarf2_section_info *section, | |
3050 | const gdb_byte *bytes, | |
3051 | offset_type elements) | |
1fd400ff | 3052 | { |
12359b5e | 3053 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 3054 | |
b2bdb8cf SM |
3055 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3056 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 3057 | |
12359b5e | 3058 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); |
1fd400ff | 3059 | |
12359b5e | 3060 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 3061 | { |
52dc124a | 3062 | struct signatured_type *sig_type; |
9c541725 | 3063 | ULONGEST signature; |
1fd400ff | 3064 | void **slot; |
9c541725 | 3065 | cu_offset type_offset_in_tu; |
1fd400ff | 3066 | |
74a0d9f6 | 3067 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
3068 | sect_offset sect_off |
3069 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
3070 | type_offset_in_tu | |
3071 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
3072 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
3073 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
3074 | bytes += 3 * 8; | |
3075 | ||
52dc124a | 3076 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 3077 | struct signatured_type); |
52dc124a | 3078 | sig_type->signature = signature; |
9c541725 | 3079 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 3080 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 3081 | sig_type->per_cu.section = section; |
9c541725 | 3082 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 3083 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 3084 | sig_type->per_cu.v.quick |
1fd400ff TT |
3085 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
3086 | struct dwarf2_per_cu_quick_data); | |
3087 | ||
52dc124a DE |
3088 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); |
3089 | *slot = sig_type; | |
1fd400ff | 3090 | |
b2bdb8cf | 3091 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
3092 | } |
3093 | ||
673bfd45 | 3094 | dwarf2_per_objfile->signatured_types = sig_types_hash; |
1fd400ff TT |
3095 | } |
3096 | ||
927aa2e7 JK |
3097 | /* Create the signatured type hash table from .debug_names. */ |
3098 | ||
3099 | static void | |
3100 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 3101 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3102 | const mapped_debug_names &map, |
3103 | struct dwarf2_section_info *section, | |
3104 | struct dwarf2_section_info *abbrev_section) | |
3105 | { | |
ed2dc618 SM |
3106 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3107 | ||
927aa2e7 JK |
3108 | dwarf2_read_section (objfile, section); |
3109 | dwarf2_read_section (objfile, abbrev_section); | |
3110 | ||
b2bdb8cf SM |
3111 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
3112 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 JK |
3113 | |
3114 | htab_t sig_types_hash = allocate_signatured_type_table (objfile); | |
3115 | ||
3116 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
3117 | { | |
3118 | struct signatured_type *sig_type; | |
927aa2e7 | 3119 | void **slot; |
927aa2e7 JK |
3120 | |
3121 | sect_offset sect_off | |
3122 | = (sect_offset) (extract_unsigned_integer | |
3123 | (map.tu_table_reordered + i * map.offset_size, | |
3124 | map.offset_size, | |
3125 | map.dwarf5_byte_order)); | |
3126 | ||
3127 | comp_unit_head cu_header; | |
ed2dc618 SM |
3128 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
3129 | abbrev_section, | |
927aa2e7 JK |
3130 | section->buffer + to_underlying (sect_off), |
3131 | rcuh_kind::TYPE); | |
3132 | ||
3133 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3134 | struct signatured_type); | |
3135 | sig_type->signature = cu_header.signature; | |
3136 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
3137 | sig_type->per_cu.is_debug_types = 1; | |
3138 | sig_type->per_cu.section = section; | |
3139 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 3140 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
3141 | sig_type->per_cu.v.quick |
3142 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
3143 | struct dwarf2_per_cu_quick_data); | |
3144 | ||
3145 | slot = htab_find_slot (sig_types_hash, sig_type, INSERT); | |
3146 | *slot = sig_type; | |
3147 | ||
b2bdb8cf | 3148 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
3149 | } |
3150 | ||
3151 | dwarf2_per_objfile->signatured_types = sig_types_hash; | |
3152 | } | |
3153 | ||
9291a0cd TT |
3154 | /* Read the address map data from the mapped index, and use it to |
3155 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 3156 | |
9291a0cd | 3157 | static void |
ed2dc618 SM |
3158 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
3159 | struct mapped_index *index) | |
9291a0cd | 3160 | { |
ed2dc618 | 3161 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 3162 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 3163 | const gdb_byte *iter, *end; |
9291a0cd | 3164 | struct addrmap *mutable_map; |
9291a0cd TT |
3165 | CORE_ADDR baseaddr; |
3166 | ||
8268c778 PA |
3167 | auto_obstack temp_obstack; |
3168 | ||
9291a0cd TT |
3169 | mutable_map = addrmap_create_mutable (&temp_obstack); |
3170 | ||
f00a2de2 PA |
3171 | iter = index->address_table.data (); |
3172 | end = iter + index->address_table.size (); | |
9291a0cd | 3173 | |
6a053cb1 | 3174 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
9291a0cd TT |
3175 | |
3176 | while (iter < end) | |
3177 | { | |
3178 | ULONGEST hi, lo, cu_index; | |
3179 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3180 | iter += 8; | |
3181 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
3182 | iter += 8; | |
3183 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
3184 | iter += 4; | |
f652bce2 | 3185 | |
24a55014 | 3186 | if (lo > hi) |
f652bce2 | 3187 | { |
b98664d3 | 3188 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 3189 | hex_string (lo), hex_string (hi)); |
24a55014 | 3190 | continue; |
f652bce2 | 3191 | } |
24a55014 | 3192 | |
b76e467d | 3193 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 3194 | { |
b98664d3 | 3195 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 3196 | (unsigned) cu_index); |
24a55014 | 3197 | continue; |
f652bce2 | 3198 | } |
24a55014 | 3199 | |
79748972 TT |
3200 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
3201 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 3202 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 3203 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
3204 | } |
3205 | ||
d320c2b5 | 3206 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 3207 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
3208 | } |
3209 | ||
927aa2e7 JK |
3210 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
3211 | populate the objfile's psymtabs_addrmap. */ | |
3212 | ||
3213 | static void | |
ed2dc618 | 3214 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
3215 | struct dwarf2_section_info *section) |
3216 | { | |
ed2dc618 | 3217 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
3218 | bfd *abfd = objfile->obfd; |
3219 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
6a053cb1 | 3220 | const CORE_ADDR baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
927aa2e7 JK |
3221 | |
3222 | auto_obstack temp_obstack; | |
3223 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
3224 | ||
3225 | std::unordered_map<sect_offset, | |
3226 | dwarf2_per_cu_data *, | |
3227 | gdb::hash_enum<sect_offset>> | |
3228 | debug_info_offset_to_per_cu; | |
b76e467d | 3229 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 3230 | { |
927aa2e7 JK |
3231 | const auto insertpair |
3232 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
3233 | if (!insertpair.second) | |
3234 | { | |
3235 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
3236 | "debug_info_offset %s, ignoring .debug_aranges."), |
3237 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
3238 | return; |
3239 | } | |
3240 | } | |
3241 | ||
3242 | dwarf2_read_section (objfile, section); | |
3243 | ||
3244 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
3245 | ||
3246 | const gdb_byte *addr = section->buffer; | |
3247 | ||
3248 | while (addr < section->buffer + section->size) | |
3249 | { | |
3250 | const gdb_byte *const entry_addr = addr; | |
3251 | unsigned int bytes_read; | |
3252 | ||
3253 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
3254 | &bytes_read); | |
3255 | addr += bytes_read; | |
3256 | ||
3257 | const gdb_byte *const entry_end = addr + entry_length; | |
3258 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
3259 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
3260 | if (addr + entry_length > section->buffer + section->size) | |
3261 | { | |
47e3f474 | 3262 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3263 | "length %s exceeds section length %s, " |
3264 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3265 | objfile_name (objfile), |
3266 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3267 | plongest (bytes_read + entry_length), |
3268 | pulongest (section->size)); | |
3269 | return; | |
3270 | } | |
3271 | ||
3272 | /* The version number. */ | |
3273 | const uint16_t version = read_2_bytes (abfd, addr); | |
3274 | addr += 2; | |
3275 | if (version != 2) | |
3276 | { | |
47e3f474 | 3277 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3278 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
3279 | objfile_name (objfile), |
3280 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
3281 | return; |
3282 | } | |
3283 | ||
3284 | const uint64_t debug_info_offset | |
3285 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
3286 | addr += offset_size; | |
3287 | const auto per_cu_it | |
3288 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
3289 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
3290 | { | |
47e3f474 | 3291 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3292 | "debug_info_offset %s does not exists, " |
3293 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3294 | objfile_name (objfile), |
3295 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3296 | pulongest (debug_info_offset)); |
3297 | return; | |
3298 | } | |
3299 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
3300 | ||
3301 | const uint8_t address_size = *addr++; | |
3302 | if (address_size < 1 || address_size > 8) | |
3303 | { | |
47e3f474 | 3304 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3305 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
3306 | objfile_name (objfile), |
3307 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
3308 | return; |
3309 | } | |
3310 | ||
3311 | const uint8_t segment_selector_size = *addr++; | |
3312 | if (segment_selector_size != 0) | |
3313 | { | |
47e3f474 | 3314 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3315 | "segment_selector_size %u is not supported, " |
3316 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3317 | objfile_name (objfile), |
3318 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
3319 | segment_selector_size); |
3320 | return; | |
3321 | } | |
3322 | ||
3323 | /* Must pad to an alignment boundary that is twice the address | |
3324 | size. It is undocumented by the DWARF standard but GCC does | |
3325 | use it. */ | |
3326 | for (size_t padding = ((-(addr - section->buffer)) | |
3327 | & (2 * address_size - 1)); | |
3328 | padding > 0; padding--) | |
3329 | if (*addr++ != 0) | |
3330 | { | |
47e3f474 | 3331 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 3332 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
3333 | objfile_name (objfile), |
3334 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
3335 | return; |
3336 | } | |
3337 | ||
3338 | for (;;) | |
3339 | { | |
3340 | if (addr + 2 * address_size > entry_end) | |
3341 | { | |
47e3f474 | 3342 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
3343 | "address list is not properly terminated, " |
3344 | "ignoring .debug_aranges."), | |
47e3f474 TV |
3345 | objfile_name (objfile), |
3346 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
3347 | return; |
3348 | } | |
3349 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
3350 | dwarf5_byte_order); | |
3351 | addr += address_size; | |
3352 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
3353 | dwarf5_byte_order); | |
3354 | addr += address_size; | |
3355 | if (start == 0 && length == 0) | |
3356 | break; | |
3357 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
3358 | { | |
3359 | /* Symbol was eliminated due to a COMDAT group. */ | |
3360 | continue; | |
3361 | } | |
3362 | ULONGEST end = start + length; | |
79748972 TT |
3363 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
3364 | - baseaddr); | |
3365 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
3366 | - baseaddr); | |
927aa2e7 JK |
3367 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
3368 | } | |
3369 | } | |
3370 | ||
d320c2b5 | 3371 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 3372 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
3373 | } |
3374 | ||
9291a0cd TT |
3375 | /* Find a slot in the mapped index INDEX for the object named NAME. |
3376 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
3377 | constant pool and return true. If NAME cannot be found, return |
3378 | false. */ | |
2fdf6df6 | 3379 | |
109483d9 | 3380 | static bool |
9291a0cd TT |
3381 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
3382 | offset_type **vec_out) | |
3383 | { | |
0cf03b49 | 3384 | offset_type hash; |
9291a0cd | 3385 | offset_type slot, step; |
559a7a62 | 3386 | int (*cmp) (const char *, const char *); |
9291a0cd | 3387 | |
791afaa2 | 3388 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 3389 | if (current_language->la_language == language_cplus |
45280282 IB |
3390 | || current_language->la_language == language_fortran |
3391 | || current_language->la_language == language_d) | |
0cf03b49 JK |
3392 | { |
3393 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
3394 | not contain any. */ | |
a8719064 | 3395 | |
72998fb3 | 3396 | if (strchr (name, '(') != NULL) |
0cf03b49 | 3397 | { |
109483d9 | 3398 | without_params = cp_remove_params (name); |
0cf03b49 | 3399 | |
72998fb3 | 3400 | if (without_params != NULL) |
791afaa2 | 3401 | name = without_params.get (); |
0cf03b49 JK |
3402 | } |
3403 | } | |
3404 | ||
559a7a62 | 3405 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 3406 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
3407 | simulate our NAME being searched is also lowercased. */ |
3408 | hash = mapped_index_string_hash ((index->version == 4 | |
3409 | && case_sensitivity == case_sensitive_off | |
3410 | ? 5 : index->version), | |
3411 | name); | |
3412 | ||
f00a2de2 PA |
3413 | slot = hash & (index->symbol_table.size () - 1); |
3414 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 3415 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
3416 | |
3417 | for (;;) | |
3418 | { | |
9291a0cd | 3419 | const char *str; |
f00a2de2 PA |
3420 | |
3421 | const auto &bucket = index->symbol_table[slot]; | |
3422 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 3423 | return false; |
9291a0cd | 3424 | |
f00a2de2 | 3425 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 3426 | if (!cmp (name, str)) |
9291a0cd TT |
3427 | { |
3428 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 3429 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 3430 | return true; |
9291a0cd TT |
3431 | } |
3432 | ||
f00a2de2 | 3433 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
3434 | } |
3435 | } | |
3436 | ||
4485a1c1 SM |
3437 | /* A helper function that reads the .gdb_index from BUFFER and fills |
3438 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 3439 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
3440 | ok to use deprecated sections. |
3441 | ||
3442 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
3443 | out parameters that are filled in with information about the CU and | |
3444 | TU lists in the section. | |
3445 | ||
4485a1c1 | 3446 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 3447 | |
d33bc52e | 3448 | static bool |
4485a1c1 SM |
3449 | read_gdb_index_from_buffer (struct objfile *objfile, |
3450 | const char *filename, | |
3451 | bool deprecated_ok, | |
3452 | gdb::array_view<const gdb_byte> buffer, | |
3453 | struct mapped_index *map, | |
3454 | const gdb_byte **cu_list, | |
3455 | offset_type *cu_list_elements, | |
3456 | const gdb_byte **types_list, | |
3457 | offset_type *types_list_elements) | |
3458 | { | |
3459 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 3460 | |
9291a0cd | 3461 | /* Version check. */ |
4485a1c1 | 3462 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 3463 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 3464 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 3465 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 3466 | indices. */ |
831adc1f | 3467 | if (version < 4) |
481860b3 GB |
3468 | { |
3469 | static int warning_printed = 0; | |
3470 | if (!warning_printed) | |
3471 | { | |
3472 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 3473 | filename); |
481860b3 GB |
3474 | warning_printed = 1; |
3475 | } | |
3476 | return 0; | |
3477 | } | |
3478 | /* Index version 4 uses a different hash function than index version | |
3479 | 5 and later. | |
3480 | ||
3481 | Versions earlier than 6 did not emit psymbols for inlined | |
3482 | functions. Using these files will cause GDB not to be able to | |
3483 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
3484 | indices unless the user has done |
3485 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 3486 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
3487 | { |
3488 | static int warning_printed = 0; | |
3489 | if (!warning_printed) | |
3490 | { | |
e615022a DE |
3491 | warning (_("\ |
3492 | Skipping deprecated .gdb_index section in %s.\n\ | |
3493 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
3494 | to use the section anyway."), | |
2ec9a5e0 | 3495 | filename); |
481860b3 GB |
3496 | warning_printed = 1; |
3497 | } | |
3498 | return 0; | |
3499 | } | |
796a7ff8 | 3500 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
3501 | of the TU (for symbols coming from TUs), |
3502 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
3503 | Plus gold-generated indices can have duplicate entries for global symbols, | |
3504 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
3505 | These are just performance bugs, and we can't distinguish gdb-generated | |
3506 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 3507 | |
481860b3 | 3508 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 3509 | longer backward compatible. */ |
796a7ff8 | 3510 | if (version > 8) |
594e8718 | 3511 | return 0; |
9291a0cd | 3512 | |
559a7a62 | 3513 | map->version = version; |
9291a0cd | 3514 | |
4485a1c1 | 3515 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 3516 | |
4485a1c1 | 3517 | int i = 0; |
2ec9a5e0 TT |
3518 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
3519 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
3520 | / 8); | |
1fd400ff TT |
3521 | ++i; |
3522 | ||
2ec9a5e0 TT |
3523 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
3524 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
3525 | - MAYBE_SWAP (metadata[i])) | |
3526 | / 8); | |
987d643c | 3527 | ++i; |
1fd400ff | 3528 | |
f00a2de2 PA |
3529 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
3530 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3531 | map->address_table | |
3532 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
3533 | ++i; |
3534 | ||
f00a2de2 PA |
3535 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
3536 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
3537 | map->symbol_table | |
3538 | = gdb::array_view<mapped_index::symbol_table_slot> | |
3539 | ((mapped_index::symbol_table_slot *) symbol_table, | |
3540 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 3541 | |
f00a2de2 | 3542 | ++i; |
f9d83a0b | 3543 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 3544 | |
2ec9a5e0 TT |
3545 | return 1; |
3546 | } | |
3547 | ||
4485a1c1 SM |
3548 | /* Callback types for dwarf2_read_gdb_index. */ |
3549 | ||
3550 | typedef gdb::function_view | |
3551 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
3552 | get_gdb_index_contents_ftype; | |
3553 | typedef gdb::function_view | |
3554 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
3555 | get_gdb_index_contents_dwz_ftype; | |
3556 | ||
927aa2e7 | 3557 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
3558 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3559 | ||
3560 | static int | |
4485a1c1 SM |
3561 | dwarf2_read_gdb_index |
3562 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3563 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3564 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3565 | { |
2ec9a5e0 TT |
3566 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3567 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3568 | struct dwz_file *dwz; |
12359b5e | 3569 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3570 | |
4485a1c1 SM |
3571 | gdb::array_view<const gdb_byte> main_index_contents |
3572 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3573 | ||
3574 | if (main_index_contents.empty ()) | |
3575 | return 0; | |
3576 | ||
3063847f | 3577 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
4485a1c1 SM |
3578 | if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile), |
3579 | use_deprecated_index_sections, | |
3580 | main_index_contents, map.get (), &cu_list, | |
3581 | &cu_list_elements, &types_list, | |
3582 | &types_list_elements)) | |
2ec9a5e0 TT |
3583 | return 0; |
3584 | ||
0fefef59 | 3585 | /* Don't use the index if it's empty. */ |
3063847f | 3586 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3587 | return 0; |
3588 | ||
2ec9a5e0 TT |
3589 | /* If there is a .dwz file, read it so we can get its CU list as |
3590 | well. */ | |
ed2dc618 | 3591 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3592 | if (dwz != NULL) |
2ec9a5e0 | 3593 | { |
2ec9a5e0 TT |
3594 | struct mapped_index dwz_map; |
3595 | const gdb_byte *dwz_types_ignore; | |
3596 | offset_type dwz_types_elements_ignore; | |
3597 | ||
4485a1c1 SM |
3598 | gdb::array_view<const gdb_byte> dwz_index_content |
3599 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3600 | ||
3601 | if (dwz_index_content.empty ()) | |
3602 | return 0; | |
3603 | ||
3604 | if (!read_gdb_index_from_buffer (objfile, | |
00f93c44 AM |
3605 | bfd_get_filename (dwz->dwz_bfd.get ()), |
3606 | 1, dwz_index_content, &dwz_map, | |
4485a1c1 SM |
3607 | &dwz_list, &dwz_list_elements, |
3608 | &dwz_types_ignore, | |
3609 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3610 | { |
3611 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 3612 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
3613 | return 0; |
3614 | } | |
3615 | } | |
3616 | ||
12359b5e SM |
3617 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3618 | dwz_list, dwz_list_elements); | |
1fd400ff | 3619 | |
8b70b953 TT |
3620 | if (types_list_elements) |
3621 | { | |
8b70b953 TT |
3622 | /* We can only handle a single .debug_types when we have an |
3623 | index. */ | |
fd5866f6 | 3624 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3625 | return 0; |
3626 | ||
fd5866f6 | 3627 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3628 | |
12359b5e SM |
3629 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3630 | types_list, types_list_elements); | |
8b70b953 | 3631 | } |
9291a0cd | 3632 | |
3063847f | 3633 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3634 | |
3063847f | 3635 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3636 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3637 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3638 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3639 | |
3640 | return 1; | |
3641 | } | |
3642 | ||
dee91e82 | 3643 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3644 | |
dee91e82 DE |
3645 | static void |
3646 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3647 | const gdb_byte *info_ptr, |
dee91e82 DE |
3648 | struct die_info *comp_unit_die, |
3649 | int has_children, | |
3650 | void *data) | |
9291a0cd | 3651 | { |
dee91e82 | 3652 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3653 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3654 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3655 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3656 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3657 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3658 | struct attribute *attr; |
7b9f3c50 DE |
3659 | void **slot; |
3660 | struct quick_file_names *qfn; | |
9291a0cd | 3661 | |
0186c6a7 DE |
3662 | gdb_assert (! this_cu->is_debug_types); |
3663 | ||
07261596 TT |
3664 | /* Our callers never want to match partial units -- instead they |
3665 | will match the enclosing full CU. */ | |
3666 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3667 | { | |
3668 | this_cu->v.quick->no_file_data = 1; | |
3669 | return; | |
3670 | } | |
3671 | ||
0186c6a7 | 3672 | lh_cu = this_cu; |
7b9f3c50 | 3673 | slot = NULL; |
dee91e82 | 3674 | |
fff8551c | 3675 | line_header_up lh; |
9c541725 | 3676 | sect_offset line_offset {}; |
fff8551c | 3677 | |
dee91e82 | 3678 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
435d3d88 | 3679 | if (attr != nullptr) |
9291a0cd | 3680 | { |
7b9f3c50 DE |
3681 | struct quick_file_names find_entry; |
3682 | ||
9c541725 | 3683 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3684 | |
3685 | /* We may have already read in this line header (TU line header sharing). | |
3686 | If we have we're done. */ | |
094b34ac | 3687 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3688 | find_entry.hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3689 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table, |
3690 | &find_entry, INSERT); | |
3691 | if (*slot != NULL) | |
3692 | { | |
9a3c8263 | 3693 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3694 | return; |
7b9f3c50 DE |
3695 | } |
3696 | ||
3019eac3 | 3697 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3698 | } |
3699 | if (lh == NULL) | |
3700 | { | |
094b34ac | 3701 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3702 | return; |
9291a0cd TT |
3703 | } |
3704 | ||
8d749320 | 3705 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3706 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3707 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3708 | gdb_assert (slot != NULL); |
3709 | *slot = qfn; | |
9291a0cd | 3710 | |
d721ba37 | 3711 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3712 | |
aa391654 TT |
3713 | int offset = 0; |
3714 | if (strcmp (fnd.name, "<unknown>") != 0) | |
3715 | ++offset; | |
3716 | ||
7ba99d21 | 3717 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 3718 | qfn->file_names = |
aa391654 TT |
3719 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
3720 | if (offset != 0) | |
3721 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 3722 | for (int i = 0; i < lh->file_names_size (); ++i) |
aa391654 | 3723 | qfn->file_names[i + offset] = file_full_name (i + 1, lh.get (), fnd.comp_dir); |
7b9f3c50 | 3724 | qfn->real_names = NULL; |
9291a0cd | 3725 | |
094b34ac | 3726 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3727 | } |
3728 | ||
3729 | /* A helper for the "quick" functions which attempts to read the line | |
3730 | table for THIS_CU. */ | |
3731 | ||
3732 | static struct quick_file_names * | |
e4a48d9d | 3733 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3734 | { |
0186c6a7 DE |
3735 | /* This should never be called for TUs. */ |
3736 | gdb_assert (! this_cu->is_debug_types); | |
3737 | /* Nor type unit groups. */ | |
3738 | gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu)); | |
f4dc4d17 | 3739 | |
dee91e82 DE |
3740 | if (this_cu->v.quick->file_names != NULL) |
3741 | return this_cu->v.quick->file_names; | |
3742 | /* If we know there is no line data, no point in looking again. */ | |
3743 | if (this_cu->v.quick->no_file_data) | |
3744 | return NULL; | |
3745 | ||
0186c6a7 | 3746 | init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL); |
dee91e82 DE |
3747 | |
3748 | if (this_cu->v.quick->no_file_data) | |
3749 | return NULL; | |
3750 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3751 | } |
3752 | ||
3753 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3754 | real path for a given file name from the line table. */ |
2fdf6df6 | 3755 | |
9291a0cd | 3756 | static const char * |
7b9f3c50 DE |
3757 | dw2_get_real_path (struct objfile *objfile, |
3758 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3759 | { |
7b9f3c50 DE |
3760 | if (qfn->real_names == NULL) |
3761 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3762 | qfn->num_file_names, const char *); |
9291a0cd | 3763 | |
7b9f3c50 | 3764 | if (qfn->real_names[index] == NULL) |
14278e1f | 3765 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3766 | |
7b9f3c50 | 3767 | return qfn->real_names[index]; |
9291a0cd TT |
3768 | } |
3769 | ||
3770 | static struct symtab * | |
3771 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3772 | { | |
ed2dc618 SM |
3773 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3774 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3775 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3776 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3777 | |
43f3e411 DE |
3778 | if (cust == NULL) |
3779 | return NULL; | |
ed2dc618 | 3780 | |
43f3e411 | 3781 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3782 | } |
3783 | ||
7b9f3c50 DE |
3784 | /* Traversal function for dw2_forget_cached_source_info. */ |
3785 | ||
3786 | static int | |
3787 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3788 | { |
7b9f3c50 | 3789 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3790 | |
7b9f3c50 | 3791 | if (file_data->real_names) |
9291a0cd | 3792 | { |
7b9f3c50 | 3793 | int i; |
9291a0cd | 3794 | |
7b9f3c50 | 3795 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3796 | { |
7b9f3c50 DE |
3797 | xfree ((void*) file_data->real_names[i]); |
3798 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3799 | } |
3800 | } | |
7b9f3c50 DE |
3801 | |
3802 | return 1; | |
3803 | } | |
3804 | ||
3805 | static void | |
3806 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3807 | { | |
ed2dc618 SM |
3808 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3809 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 DE |
3810 | |
3811 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table, | |
3812 | dw2_free_cached_file_names, NULL); | |
9291a0cd TT |
3813 | } |
3814 | ||
f8eba3c6 TT |
3815 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3816 | the symtabs and calls the iterator. */ | |
3817 | ||
3818 | static int | |
3819 | dw2_map_expand_apply (struct objfile *objfile, | |
3820 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3821 | const char *name, const char *real_path, |
14bc53a8 | 3822 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3823 | { |
43f3e411 | 3824 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3825 | |
3826 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3827 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3828 | return 0; |
3829 | ||
3830 | /* This may expand more than one symtab, and we want to iterate over | |
3831 | all of them. */ | |
58f0c718 | 3832 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3833 | |
14bc53a8 PA |
3834 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3835 | last_made, callback); | |
f8eba3c6 TT |
3836 | } |
3837 | ||
3838 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3839 | ||
14bc53a8 PA |
3840 | static bool |
3841 | dw2_map_symtabs_matching_filename | |
3842 | (struct objfile *objfile, const char *name, const char *real_path, | |
3843 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3844 | { |
c011a4f4 | 3845 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3846 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3847 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3848 | |
848e3e78 DE |
3849 | /* The rule is CUs specify all the files, including those used by |
3850 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3851 | |
b76e467d | 3852 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3853 | { |
3d7bb9d9 | 3854 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3855 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3856 | continue; |
3857 | ||
b76e467d | 3858 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3859 | if (file_data == NULL) |
9291a0cd TT |
3860 | continue; |
3861 | ||
b76e467d | 3862 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3863 | { |
7b9f3c50 | 3864 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3865 | const char *this_real_name; |
9291a0cd | 3866 | |
af529f8f | 3867 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3868 | { |
f5b95b50 | 3869 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3870 | callback)) |
3871 | return true; | |
288e77a7 | 3872 | continue; |
4aac40c8 | 3873 | } |
9291a0cd | 3874 | |
c011a4f4 DE |
3875 | /* Before we invoke realpath, which can get expensive when many |
3876 | files are involved, do a quick comparison of the basenames. */ | |
3877 | if (! basenames_may_differ | |
3878 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3879 | continue; | |
3880 | ||
da235a7c JK |
3881 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3882 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3883 | { |
da235a7c | 3884 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3885 | callback)) |
3886 | return true; | |
288e77a7 | 3887 | continue; |
da235a7c | 3888 | } |
9291a0cd | 3889 | |
da235a7c JK |
3890 | if (real_path != NULL) |
3891 | { | |
af529f8f JK |
3892 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3893 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3894 | if (this_real_name != NULL |
af529f8f | 3895 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3896 | { |
f5b95b50 | 3897 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3898 | callback)) |
3899 | return true; | |
288e77a7 | 3900 | continue; |
9291a0cd TT |
3901 | } |
3902 | } | |
3903 | } | |
3904 | } | |
3905 | ||
14bc53a8 | 3906 | return false; |
9291a0cd TT |
3907 | } |
3908 | ||
da51c347 DE |
3909 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3910 | ||
3911 | struct dw2_symtab_iterator | |
9291a0cd | 3912 | { |
ed2dc618 SM |
3913 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3914 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3915 | /* If set, only look for symbols that match that block. Valid values are |
3916 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3917 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3918 | /* The kind of symbol we're looking for. */ |
3919 | domain_enum domain; | |
3920 | /* The list of CUs from the index entry of the symbol, | |
3921 | or NULL if not found. */ | |
3922 | offset_type *vec; | |
3923 | /* The next element in VEC to look at. */ | |
3924 | int next; | |
3925 | /* The number of elements in VEC, or zero if there is no match. */ | |
3926 | int length; | |
8943b874 DE |
3927 | /* Have we seen a global version of the symbol? |
3928 | If so we can ignore all further global instances. | |
3929 | This is to work around gold/15646, inefficient gold-generated | |
3930 | indices. */ | |
3931 | int global_seen; | |
da51c347 | 3932 | }; |
9291a0cd | 3933 | |
2b79f376 | 3934 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3935 | |
9291a0cd | 3936 | static void |
da51c347 | 3937 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3938 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3939 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3940 | domain_enum domain, |
3941 | const char *name) | |
3942 | { | |
ed2dc618 | 3943 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3944 | iter->block_index = block_index; |
3945 | iter->domain = domain; | |
3946 | iter->next = 0; | |
8943b874 | 3947 | iter->global_seen = 0; |
da51c347 | 3948 | |
3063847f | 3949 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3950 | |
3951 | /* index is NULL if OBJF_READNOW. */ | |
3952 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3953 | iter->length = MAYBE_SWAP (*iter->vec); |
3954 | else | |
3955 | { | |
3956 | iter->vec = NULL; | |
3957 | iter->length = 0; | |
3958 | } | |
3959 | } | |
3960 | ||
3961 | /* Return the next matching CU or NULL if there are no more. */ | |
3962 | ||
3963 | static struct dwarf2_per_cu_data * | |
3964 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3965 | { | |
ed2dc618 SM |
3966 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3967 | ||
da51c347 DE |
3968 | for ( ; iter->next < iter->length; ++iter->next) |
3969 | { | |
3970 | offset_type cu_index_and_attrs = | |
3971 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3972 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3973 | gdb_index_symbol_kind symbol_kind = |
3974 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3975 | /* Only check the symbol attributes if they're present. | |
3976 | Indices prior to version 7 don't record them, | |
3977 | and indices >= 7 may elide them for certain symbols | |
3978 | (gold does this). */ | |
3979 | int attrs_valid = | |
ed2dc618 | 3980 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3981 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3982 | ||
3190f0c6 | 3983 | /* Don't crash on bad data. */ |
b76e467d | 3984 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3985 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3986 | { |
b98664d3 | 3987 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3988 | " [in module %s]"), |
3989 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3990 | continue; |
3991 | } | |
3992 | ||
ff4c9fec | 3993 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3994 | |
da51c347 | 3995 | /* Skip if already read in. */ |
43f3e411 | 3996 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3997 | continue; |
3998 | ||
8943b874 DE |
3999 | /* Check static vs global. */ |
4000 | if (attrs_valid) | |
4001 | { | |
2b79f376 SM |
4002 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
4003 | ||
4004 | if (iter->block_index.has_value ()) | |
4005 | { | |
4006 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
4007 | ||
4008 | if (is_static != want_static) | |
4009 | continue; | |
4010 | } | |
4011 | ||
8943b874 DE |
4012 | /* Work around gold/15646. */ |
4013 | if (!is_static && iter->global_seen) | |
4014 | continue; | |
4015 | if (!is_static) | |
4016 | iter->global_seen = 1; | |
4017 | } | |
da51c347 DE |
4018 | |
4019 | /* Only check the symbol's kind if it has one. */ | |
4020 | if (attrs_valid) | |
4021 | { | |
4022 | switch (iter->domain) | |
4023 | { | |
4024 | case VAR_DOMAIN: | |
4025 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
4026 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
4027 | /* Some types are also in VAR_DOMAIN. */ | |
4028 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4029 | continue; | |
4030 | break; | |
4031 | case STRUCT_DOMAIN: | |
4032 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4033 | continue; | |
4034 | break; | |
4035 | case LABEL_DOMAIN: | |
4036 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4037 | continue; | |
4038 | break; | |
59c35742 AB |
4039 | case MODULE_DOMAIN: |
4040 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4041 | continue; | |
4042 | break; | |
da51c347 DE |
4043 | default: |
4044 | break; | |
4045 | } | |
4046 | } | |
4047 | ||
4048 | ++iter->next; | |
4049 | return per_cu; | |
4050 | } | |
4051 | ||
4052 | return NULL; | |
4053 | } | |
4054 | ||
43f3e411 | 4055 | static struct compunit_symtab * |
c7f839cb | 4056 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 4057 | const char *name, domain_enum domain) |
9291a0cd | 4058 | { |
43f3e411 | 4059 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
4060 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4061 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 4062 | |
b5ec771e PA |
4063 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
4064 | ||
ed2dc618 SM |
4065 | struct dw2_symtab_iterator iter; |
4066 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4067 | |
2b79f376 | 4068 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 4069 | |
ed2dc618 SM |
4070 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
4071 | { | |
4072 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 4073 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 4074 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 4075 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 4076 | |
ed2dc618 SM |
4077 | sym = block_find_symbol (block, name, domain, |
4078 | block_find_non_opaque_type_preferred, | |
4079 | &with_opaque); | |
b2e2f908 | 4080 | |
ed2dc618 SM |
4081 | /* Some caution must be observed with overloaded functions |
4082 | and methods, since the index will not contain any overload | |
4083 | information (but NAME might contain it). */ | |
da51c347 | 4084 | |
ed2dc618 SM |
4085 | if (sym != NULL |
4086 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
4087 | return stab; | |
4088 | if (with_opaque != NULL | |
4089 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
4090 | stab_best = stab; | |
da51c347 | 4091 | |
ed2dc618 | 4092 | /* Keep looking through other CUs. */ |
9291a0cd | 4093 | } |
9291a0cd | 4094 | |
da51c347 | 4095 | return stab_best; |
9291a0cd TT |
4096 | } |
4097 | ||
4098 | static void | |
4099 | dw2_print_stats (struct objfile *objfile) | |
4100 | { | |
ed2dc618 SM |
4101 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4102 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4103 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4104 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 4105 | int count = 0; |
9291a0cd | 4106 | |
ed2dc618 | 4107 | for (int i = 0; i < total; ++i) |
9291a0cd | 4108 | { |
ff4c9fec | 4109 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4110 | |
43f3e411 | 4111 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4112 | ++count; |
4113 | } | |
e4a48d9d | 4114 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
4115 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
4116 | } | |
4117 | ||
779bd270 DE |
4118 | /* This dumps minimal information about the index. |
4119 | It is called via "mt print objfiles". | |
4120 | One use is to verify .gdb_index has been loaded by the | |
4121 | gdb.dwarf2/gdb-index.exp testcase. */ | |
4122 | ||
9291a0cd TT |
4123 | static void |
4124 | dw2_dump (struct objfile *objfile) | |
4125 | { | |
ed2dc618 SM |
4126 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4127 | = get_dwarf2_per_objfile (objfile); | |
4128 | ||
779bd270 DE |
4129 | gdb_assert (dwarf2_per_objfile->using_index); |
4130 | printf_filtered (".gdb_index:"); | |
4131 | if (dwarf2_per_objfile->index_table != NULL) | |
4132 | { | |
4133 | printf_filtered (" version %d\n", | |
4134 | dwarf2_per_objfile->index_table->version); | |
4135 | } | |
4136 | else | |
4137 | printf_filtered (" faked for \"readnow\"\n"); | |
4138 | printf_filtered ("\n"); | |
9291a0cd TT |
4139 | } |
4140 | ||
9291a0cd TT |
4141 | static void |
4142 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
4143 | const char *func_name) | |
4144 | { | |
ed2dc618 SM |
4145 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4146 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 4147 | |
ed2dc618 SM |
4148 | struct dw2_symtab_iterator iter; |
4149 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 4150 | |
2b79f376 | 4151 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 4152 | |
ed2dc618 | 4153 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 4154 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 4155 | |
9291a0cd TT |
4156 | } |
4157 | ||
4158 | static void | |
4159 | dw2_expand_all_symtabs (struct objfile *objfile) | |
4160 | { | |
ed2dc618 SM |
4161 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4162 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 4163 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4164 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 4165 | |
ed2dc618 | 4166 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 4167 | { |
ff4c9fec | 4168 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 4169 | |
58f0c718 TT |
4170 | /* We don't want to directly expand a partial CU, because if we |
4171 | read it with the wrong language, then assertion failures can | |
4172 | be triggered later on. See PR symtab/23010. So, tell | |
4173 | dw2_instantiate_symtab to skip partial CUs -- any important | |
4174 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
4175 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
4176 | } |
4177 | } | |
4178 | ||
4179 | static void | |
652a8996 JK |
4180 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
4181 | const char *fullname) | |
9291a0cd | 4182 | { |
ed2dc618 SM |
4183 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4184 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
4185 | |
4186 | /* We don't need to consider type units here. | |
4187 | This is only called for examining code, e.g. expand_line_sal. | |
4188 | There can be an order of magnitude (or more) more type units | |
4189 | than comp units, and we avoid them if we can. */ | |
4190 | ||
b76e467d | 4191 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 4192 | { |
3d7bb9d9 | 4193 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 4194 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
4195 | continue; |
4196 | ||
b76e467d | 4197 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 4198 | if (file_data == NULL) |
9291a0cd TT |
4199 | continue; |
4200 | ||
b76e467d | 4201 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 4202 | { |
652a8996 JK |
4203 | const char *this_fullname = file_data->file_names[j]; |
4204 | ||
4205 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 4206 | { |
58f0c718 | 4207 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
4208 | break; |
4209 | } | |
4210 | } | |
4211 | } | |
4212 | } | |
4213 | ||
9291a0cd | 4214 | static void |
199b4314 TT |
4215 | dw2_map_matching_symbols |
4216 | (struct objfile *objfile, | |
b054970d | 4217 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
4218 | int global, |
4219 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 4220 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 4221 | { |
40658b94 | 4222 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
4223 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
4224 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
4225 | } |
4226 | ||
e1ef7d7a PA |
4227 | /* Starting from a search name, return the string that finds the upper |
4228 | bound of all strings that start with SEARCH_NAME in a sorted name | |
4229 | list. Returns the empty string to indicate that the upper bound is | |
4230 | the end of the list. */ | |
4231 | ||
4232 | static std::string | |
4233 | make_sort_after_prefix_name (const char *search_name) | |
4234 | { | |
4235 | /* When looking to complete "func", we find the upper bound of all | |
4236 | symbols that start with "func" by looking for where we'd insert | |
4237 | the closest string that would follow "func" in lexicographical | |
4238 | order. Usually, that's "func"-with-last-character-incremented, | |
4239 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
4240 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
4241 | Especially mind the 0xff character, which is a valid character in | |
4242 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
4243 | rule out compilers allowing it in identifiers. Note that | |
4244 | conveniently, strcmp/strcasecmp are specified to compare | |
4245 | characters interpreted as unsigned char. So what we do is treat | |
4246 | the whole string as a base 256 number composed of a sequence of | |
4247 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
4248 | to 0, and carries 1 to the following more-significant position. | |
4249 | If the very first character in SEARCH_NAME ends up incremented | |
4250 | and carries/overflows, then the upper bound is the end of the | |
4251 | list. The string after the empty string is also the empty | |
4252 | string. | |
4253 | ||
4254 | Some examples of this operation: | |
4255 | ||
4256 | SEARCH_NAME => "+1" RESULT | |
4257 | ||
4258 | "abc" => "abd" | |
4259 | "ab\xff" => "ac" | |
4260 | "\xff" "a" "\xff" => "\xff" "b" | |
4261 | "\xff" => "" | |
4262 | "\xff\xff" => "" | |
4263 | "" => "" | |
4264 | ||
4265 | Then, with these symbols for example: | |
4266 | ||
4267 | func | |
4268 | func1 | |
4269 | fund | |
4270 | ||
4271 | completing "func" looks for symbols between "func" and | |
4272 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
4273 | which finds "func" and "func1", but not "fund". | |
4274 | ||
4275 | And with: | |
4276 | ||
4277 | funcÿ (Latin1 'ÿ' [0xff]) | |
4278 | funcÿ1 | |
4279 | fund | |
4280 | ||
4281 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
4282 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
4283 | ||
4284 | And with: | |
4285 | ||
4286 | ÿÿ (Latin1 'ÿ' [0xff]) | |
4287 | ÿÿ1 | |
4288 | ||
4289 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
4290 | the end of the list. | |
4291 | */ | |
4292 | std::string after = search_name; | |
4293 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
4294 | after.pop_back (); | |
4295 | if (!after.empty ()) | |
4296 | after.back () = (unsigned char) after.back () + 1; | |
4297 | return after; | |
4298 | } | |
4299 | ||
5c58de74 | 4300 | /* See declaration. */ |
61d96d7e | 4301 | |
5c58de74 PA |
4302 | std::pair<std::vector<name_component>::const_iterator, |
4303 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 4304 | mapped_index_base::find_name_components_bounds |
3b00ef10 | 4305 | (const lookup_name_info &lookup_name_without_params, language lang) const |
3f563c84 | 4306 | { |
5c58de74 PA |
4307 | auto *name_cmp |
4308 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 4309 | |
3b00ef10 TT |
4310 | const char *lang_name |
4311 | = lookup_name_without_params.language_lookup_name (lang).c_str (); | |
9291a0cd | 4312 | |
3f563c84 PA |
4313 | /* Comparison function object for lower_bound that matches against a |
4314 | given symbol name. */ | |
4315 | auto lookup_compare_lower = [&] (const name_component &elem, | |
4316 | const char *name) | |
4317 | { | |
5c58de74 | 4318 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4319 | const char *elem_name = elem_qualified + elem.name_offset; |
4320 | return name_cmp (elem_name, name) < 0; | |
4321 | }; | |
4322 | ||
4323 | /* Comparison function object for upper_bound that matches against a | |
4324 | given symbol name. */ | |
4325 | auto lookup_compare_upper = [&] (const char *name, | |
4326 | const name_component &elem) | |
4327 | { | |
5c58de74 | 4328 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
4329 | const char *elem_name = elem_qualified + elem.name_offset; |
4330 | return name_cmp (name, elem_name) < 0; | |
4331 | }; | |
4332 | ||
5c58de74 PA |
4333 | auto begin = this->name_components.begin (); |
4334 | auto end = this->name_components.end (); | |
3f563c84 PA |
4335 | |
4336 | /* Find the lower bound. */ | |
4337 | auto lower = [&] () | |
4338 | { | |
3b00ef10 | 4339 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
4340 | return begin; |
4341 | else | |
3b00ef10 | 4342 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
4343 | } (); |
4344 | ||
4345 | /* Find the upper bound. */ | |
4346 | auto upper = [&] () | |
4347 | { | |
5c58de74 | 4348 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 4349 | { |
e1ef7d7a PA |
4350 | /* In completion mode, we want UPPER to point past all |
4351 | symbols names that have the same prefix. I.e., with | |
4352 | these symbols, and completing "func": | |
4353 | ||
4354 | function << lower bound | |
4355 | function1 | |
4356 | other_function << upper bound | |
4357 | ||
4358 | We find the upper bound by looking for the insertion | |
4359 | point of "func"-with-last-character-incremented, | |
4360 | i.e. "fund". */ | |
3b00ef10 | 4361 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 4362 | if (after.empty ()) |
3f563c84 | 4363 | return end; |
e6b2f5ef PA |
4364 | return std::lower_bound (lower, end, after.c_str (), |
4365 | lookup_compare_lower); | |
3f563c84 PA |
4366 | } |
4367 | else | |
3b00ef10 | 4368 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
4369 | } (); |
4370 | ||
5c58de74 PA |
4371 | return {lower, upper}; |
4372 | } | |
4373 | ||
4374 | /* See declaration. */ | |
4375 | ||
4376 | void | |
44ed8f3e | 4377 | mapped_index_base::build_name_components () |
5c58de74 PA |
4378 | { |
4379 | if (!this->name_components.empty ()) | |
4380 | return; | |
4381 | ||
4382 | this->name_components_casing = case_sensitivity; | |
4383 | auto *name_cmp | |
4384 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
4385 | ||
4386 | /* The code below only knows how to break apart components of C++ | |
4387 | symbol names (and other languages that use '::' as | |
3b00ef10 | 4388 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
4389 | auto count = this->symbol_name_count (); |
4390 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 4391 | { |
44ed8f3e | 4392 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
4393 | continue; |
4394 | ||
4395 | const char *name = this->symbol_name_at (idx); | |
4396 | ||
4397 | /* Add each name component to the name component table. */ | |
4398 | unsigned int previous_len = 0; | |
3b00ef10 TT |
4399 | |
4400 | if (strstr (name, "::") != nullptr) | |
4401 | { | |
4402 | for (unsigned int current_len = cp_find_first_component (name); | |
4403 | name[current_len] != '\0'; | |
4404 | current_len += cp_find_first_component (name + current_len)) | |
4405 | { | |
4406 | gdb_assert (name[current_len] == ':'); | |
4407 | this->name_components.push_back ({previous_len, idx}); | |
4408 | /* Skip the '::'. */ | |
4409 | current_len += 2; | |
4410 | previous_len = current_len; | |
4411 | } | |
4412 | } | |
4413 | else | |
5c58de74 | 4414 | { |
3b00ef10 TT |
4415 | /* Handle the Ada encoded (aka mangled) form here. */ |
4416 | for (const char *iter = strstr (name, "__"); | |
4417 | iter != nullptr; | |
4418 | iter = strstr (iter, "__")) | |
4419 | { | |
4420 | this->name_components.push_back ({previous_len, idx}); | |
4421 | iter += 2; | |
4422 | previous_len = iter - name; | |
4423 | } | |
5c58de74 | 4424 | } |
3b00ef10 | 4425 | |
5c58de74 PA |
4426 | this->name_components.push_back ({previous_len, idx}); |
4427 | } | |
4428 | ||
4429 | /* Sort name_components elements by name. */ | |
4430 | auto name_comp_compare = [&] (const name_component &left, | |
4431 | const name_component &right) | |
4432 | { | |
4433 | const char *left_qualified = this->symbol_name_at (left.idx); | |
4434 | const char *right_qualified = this->symbol_name_at (right.idx); | |
4435 | ||
4436 | const char *left_name = left_qualified + left.name_offset; | |
4437 | const char *right_name = right_qualified + right.name_offset; | |
4438 | ||
4439 | return name_cmp (left_name, right_name) < 0; | |
4440 | }; | |
4441 | ||
4442 | std::sort (this->name_components.begin (), | |
4443 | this->name_components.end (), | |
4444 | name_comp_compare); | |
4445 | } | |
4446 | ||
4447 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
4448 | mapped_index_base instead of the containing objfile. This is split |
4449 | to a separate function in order to be able to unit test the | |
4450 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 4451 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 4452 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
4453 | |
4454 | static void | |
4455 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 4456 | (mapped_index_base &index, |
5c58de74 PA |
4457 | const lookup_name_info &lookup_name_in, |
4458 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4459 | enum search_domain kind, | |
3b00ef10 | 4460 | gdb::function_view<bool (offset_type)> match_callback) |
5c58de74 PA |
4461 | { |
4462 | lookup_name_info lookup_name_without_params | |
4463 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
4464 | |
4465 | /* Build the symbol name component sorted vector, if we haven't | |
4466 | yet. */ | |
4467 | index.build_name_components (); | |
4468 | ||
3f563c84 PA |
4469 | /* The same symbol may appear more than once in the range though. |
4470 | E.g., if we're looking for symbols that complete "w", and we have | |
4471 | a symbol named "w1::w2", we'll find the two name components for | |
4472 | that same symbol in the range. To be sure we only call the | |
4473 | callback once per symbol, we first collect the symbol name | |
4474 | indexes that matched in a temporary vector and ignore | |
4475 | duplicates. */ | |
4476 | std::vector<offset_type> matches; | |
3f563c84 | 4477 | |
3b00ef10 TT |
4478 | struct name_and_matcher |
4479 | { | |
4480 | symbol_name_matcher_ftype *matcher; | |
4481 | const std::string &name; | |
4482 | ||
4483 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 4484 | { |
3b00ef10 TT |
4485 | return matcher == other.matcher && name == other.name; |
4486 | } | |
4487 | }; | |
4488 | ||
4489 | /* A vector holding all the different symbol name matchers, for all | |
4490 | languages. */ | |
4491 | std::vector<name_and_matcher> matchers; | |
4492 | ||
4493 | for (int i = 0; i < nr_languages; i++) | |
4494 | { | |
4495 | enum language lang_e = (enum language) i; | |
4496 | ||
4497 | const language_defn *lang = language_def (lang_e); | |
4498 | symbol_name_matcher_ftype *name_matcher | |
4499 | = get_symbol_name_matcher (lang, lookup_name_without_params); | |
3f563c84 | 4500 | |
3b00ef10 TT |
4501 | name_and_matcher key { |
4502 | name_matcher, | |
4503 | lookup_name_without_params.language_lookup_name (lang_e) | |
4504 | }; | |
4505 | ||
4506 | /* Don't insert the same comparison routine more than once. | |
4507 | Note that we do this linear walk. This is not a problem in | |
4508 | practice because the number of supported languages is | |
4509 | low. */ | |
4510 | if (std::find (matchers.begin (), matchers.end (), key) | |
4511 | != matchers.end ()) | |
9291a0cd | 4512 | continue; |
3b00ef10 TT |
4513 | matchers.push_back (std::move (key)); |
4514 | ||
4515 | auto bounds | |
4516 | = index.find_name_components_bounds (lookup_name_without_params, | |
4517 | lang_e); | |
4518 | ||
4519 | /* Now for each symbol name in range, check to see if we have a name | |
4520 | match, and if so, call the MATCH_CALLBACK callback. */ | |
4521 | ||
4522 | for (; bounds.first != bounds.second; ++bounds.first) | |
4523 | { | |
4524 | const char *qualified = index.symbol_name_at (bounds.first->idx); | |
4525 | ||
4526 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
4527 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
4528 | continue; | |
9291a0cd | 4529 | |
3b00ef10 TT |
4530 | matches.push_back (bounds.first->idx); |
4531 | } | |
3f563c84 PA |
4532 | } |
4533 | ||
4534 | std::sort (matches.begin (), matches.end ()); | |
4535 | ||
4536 | /* Finally call the callback, once per match. */ | |
4537 | ULONGEST prev = -1; | |
4538 | for (offset_type idx : matches) | |
4539 | { | |
4540 | if (prev != idx) | |
4541 | { | |
3b00ef10 TT |
4542 | if (!match_callback (idx)) |
4543 | break; | |
3f563c84 PA |
4544 | prev = idx; |
4545 | } | |
4546 | } | |
4547 | ||
4548 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
4549 | (offset_type)-1 are both possible values. */ | |
4550 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
4551 | } | |
4552 | ||
c62446b1 PA |
4553 | #if GDB_SELF_TEST |
4554 | ||
4555 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
4556 | ||
a3c5fafd PA |
4557 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4558 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4559 | mapped_index_base interface. Builds an index from the symbol list | |
4560 | passed as parameter to the constructor. */ | |
4561 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4562 | { |
4563 | public: | |
a3c5fafd PA |
4564 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4565 | : m_symbol_table (symbols) | |
c62446b1 PA |
4566 | {} |
4567 | ||
a3c5fafd | 4568 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4569 | |
a3c5fafd | 4570 | /* Return the number of names in the symbol table. */ |
632e107b | 4571 | size_t symbol_name_count () const override |
c62446b1 | 4572 | { |
a3c5fafd | 4573 | return m_symbol_table.size (); |
c62446b1 PA |
4574 | } |
4575 | ||
a3c5fafd | 4576 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4577 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4578 | { |
4579 | return m_symbol_table[idx]; | |
4580 | } | |
c62446b1 | 4581 | |
a3c5fafd PA |
4582 | private: |
4583 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4584 | }; |
4585 | ||
4586 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4587 | string, to pass to print routines. */ | |
4588 | ||
4589 | static const char * | |
4590 | string_or_null (const char *str) | |
4591 | { | |
4592 | return str != NULL ? str : "<null>"; | |
4593 | } | |
4594 | ||
4595 | /* Check if a lookup_name_info built from | |
4596 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4597 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4598 | matching order. If no match expected, then an empty list is | |
4599 | specified. Returns true on success. On failure prints a warning | |
4600 | indicating the file:line that failed, and returns false. */ | |
4601 | ||
4602 | static bool | |
4603 | check_match (const char *file, int line, | |
4604 | mock_mapped_index &mock_index, | |
4605 | const char *name, symbol_name_match_type match_type, | |
4606 | bool completion_mode, | |
4607 | std::initializer_list<const char *> expected_list) | |
4608 | { | |
4609 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4610 | ||
4611 | bool matched = true; | |
4612 | ||
4613 | auto mismatch = [&] (const char *expected_str, | |
4614 | const char *got) | |
4615 | { | |
4616 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4617 | "expected=\"%s\", got=\"%s\"\n"), | |
4618 | file, line, | |
4619 | (match_type == symbol_name_match_type::FULL | |
4620 | ? "FULL" : "WILD"), | |
4621 | name, string_or_null (expected_str), string_or_null (got)); | |
4622 | matched = false; | |
4623 | }; | |
4624 | ||
4625 | auto expected_it = expected_list.begin (); | |
4626 | auto expected_end = expected_list.end (); | |
4627 | ||
a3c5fafd | 4628 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4629 | NULL, ALL_DOMAIN, |
4630 | [&] (offset_type idx) | |
4631 | { | |
a3c5fafd | 4632 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4633 | const char *expected_str |
4634 | = expected_it == expected_end ? NULL : *expected_it++; | |
4635 | ||
4636 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4637 | mismatch (expected_str, matched_name); | |
3b00ef10 | 4638 | return true; |
c62446b1 PA |
4639 | }); |
4640 | ||
4641 | const char *expected_str | |
4642 | = expected_it == expected_end ? NULL : *expected_it++; | |
4643 | if (expected_str != NULL) | |
4644 | mismatch (expected_str, NULL); | |
4645 | ||
4646 | return matched; | |
4647 | } | |
4648 | ||
4649 | /* The symbols added to the mock mapped_index for testing (in | |
4650 | canonical form). */ | |
4651 | static const char *test_symbols[] = { | |
4652 | "function", | |
4653 | "std::bar", | |
4654 | "std::zfunction", | |
4655 | "std::zfunction2", | |
4656 | "w1::w2", | |
4657 | "ns::foo<char*>", | |
4658 | "ns::foo<int>", | |
4659 | "ns::foo<long>", | |
a20714ff PA |
4660 | "ns2::tmpl<int>::foo2", |
4661 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4662 | |
e1ef7d7a PA |
4663 | /* These are used to check that the increment-last-char in the |
4664 | matching algorithm for completion doesn't match "t1_fund" when | |
4665 | completing "t1_func". */ | |
4666 | "t1_func", | |
4667 | "t1_func1", | |
4668 | "t1_fund", | |
4669 | "t1_fund1", | |
4670 | ||
4671 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4672 | cp-name-parser understands this as a single identifier ("função" | |
4673 | is "function" in PT). */ | |
4674 | u8"u8função", | |
4675 | ||
4676 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4677 | "yfunc\377", | |
4678 | ||
4679 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4680 | "\377", | |
4681 | "\377\377123", | |
4682 | ||
c62446b1 PA |
4683 | /* A name with all sorts of complications. Starts with "z" to make |
4684 | it easier for the completion tests below. */ | |
4685 | #define Z_SYM_NAME \ | |
4686 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4687 | "::tuple<(anonymous namespace)::ui*, " \ | |
4688 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4689 | ||
4690 | Z_SYM_NAME | |
4691 | }; | |
4692 | ||
a3c5fafd PA |
4693 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4694 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4695 | in completion mode. */ | |
5c58de74 PA |
4696 | |
4697 | static bool | |
a3c5fafd | 4698 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4699 | const char *search_name, |
4700 | gdb::array_view<const char *> expected_syms) | |
4701 | { | |
4702 | lookup_name_info lookup_name (search_name, | |
4703 | symbol_name_match_type::FULL, true); | |
4704 | ||
3b00ef10 TT |
4705 | auto bounds = index.find_name_components_bounds (lookup_name, |
4706 | language_cplus); | |
5c58de74 PA |
4707 | |
4708 | size_t distance = std::distance (bounds.first, bounds.second); | |
4709 | if (distance != expected_syms.size ()) | |
4710 | return false; | |
4711 | ||
4712 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4713 | { | |
4714 | auto nc_elem = bounds.first + exp_elem; | |
4715 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4716 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4717 | return false; | |
4718 | } | |
4719 | ||
4720 | return true; | |
4721 | } | |
4722 | ||
4723 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4724 | method. */ | |
4725 | ||
c62446b1 | 4726 | static void |
5c58de74 PA |
4727 | test_mapped_index_find_name_component_bounds () |
4728 | { | |
4729 | mock_mapped_index mock_index (test_symbols); | |
4730 | ||
a3c5fafd | 4731 | mock_index.build_name_components (); |
5c58de74 PA |
4732 | |
4733 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4734 | method in completion mode. */ | |
4735 | { | |
4736 | static const char *expected_syms[] = { | |
4737 | "t1_func", | |
4738 | "t1_func1", | |
5c58de74 PA |
4739 | }; |
4740 | ||
a3c5fafd | 4741 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4742 | "t1_func", expected_syms)); |
4743 | } | |
4744 | ||
4745 | /* Check that the increment-last-char in the name matching algorithm | |
4746 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4747 | { | |
4748 | static const char *expected_syms1[] = { | |
4749 | "\377", | |
4750 | "\377\377123", | |
4751 | }; | |
a3c5fafd | 4752 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4753 | "\377", expected_syms1)); |
4754 | ||
4755 | static const char *expected_syms2[] = { | |
4756 | "\377\377123", | |
4757 | }; | |
a3c5fafd | 4758 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4759 | "\377\377", expected_syms2)); |
4760 | } | |
4761 | } | |
4762 | ||
4763 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4764 | ||
4765 | static void | |
4766 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4767 | { |
4768 | mock_mapped_index mock_index (test_symbols); | |
4769 | ||
4770 | /* We let all tests run until the end even if some fails, for debug | |
4771 | convenience. */ | |
4772 | bool any_mismatch = false; | |
4773 | ||
4774 | /* Create the expected symbols list (an initializer_list). Needed | |
4775 | because lists have commas, and we need to pass them to CHECK, | |
4776 | which is a macro. */ | |
4777 | #define EXPECT(...) { __VA_ARGS__ } | |
4778 | ||
4779 | /* Wrapper for check_match that passes down the current | |
4780 | __FILE__/__LINE__. */ | |
4781 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4782 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4783 | mock_index, \ | |
4784 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4785 | EXPECTED_LIST) | |
4786 | ||
4787 | /* Identity checks. */ | |
4788 | for (const char *sym : test_symbols) | |
4789 | { | |
4790 | /* Should be able to match all existing symbols. */ | |
4791 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4792 | EXPECT (sym)); | |
4793 | ||
4794 | /* Should be able to match all existing symbols with | |
4795 | parameters. */ | |
4796 | std::string with_params = std::string (sym) + "(int)"; | |
4797 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4798 | EXPECT (sym)); | |
4799 | ||
4800 | /* Should be able to match all existing symbols with | |
4801 | parameters and qualifiers. */ | |
4802 | with_params = std::string (sym) + " ( int ) const"; | |
4803 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4804 | EXPECT (sym)); | |
4805 | ||
4806 | /* This should really find sym, but cp-name-parser.y doesn't | |
4807 | know about lvalue/rvalue qualifiers yet. */ | |
4808 | with_params = std::string (sym) + " ( int ) &&"; | |
4809 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4810 | {}); | |
4811 | } | |
4812 | ||
e1ef7d7a PA |
4813 | /* Check that the name matching algorithm for completion doesn't get |
4814 | confused with Latin1 'ÿ' / 0xff. */ | |
4815 | { | |
4816 | static const char str[] = "\377"; | |
4817 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4818 | EXPECT ("\377", "\377\377123")); | |
4819 | } | |
4820 | ||
4821 | /* Check that the increment-last-char in the matching algorithm for | |
4822 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4823 | { | |
4824 | static const char str[] = "t1_func"; | |
4825 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4826 | EXPECT ("t1_func", "t1_func1")); | |
4827 | } | |
4828 | ||
c62446b1 PA |
4829 | /* Check that completion mode works at each prefix of the expected |
4830 | symbol name. */ | |
4831 | { | |
4832 | static const char str[] = "function(int)"; | |
4833 | size_t len = strlen (str); | |
4834 | std::string lookup; | |
4835 | ||
4836 | for (size_t i = 1; i < len; i++) | |
4837 | { | |
4838 | lookup.assign (str, i); | |
4839 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4840 | EXPECT ("function")); | |
4841 | } | |
4842 | } | |
4843 | ||
4844 | /* While "w" is a prefix of both components, the match function | |
4845 | should still only be called once. */ | |
4846 | { | |
4847 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4848 | EXPECT ("w1::w2")); | |
a20714ff PA |
4849 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4850 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4851 | } |
4852 | ||
4853 | /* Same, with a "complicated" symbol. */ | |
4854 | { | |
4855 | static const char str[] = Z_SYM_NAME; | |
4856 | size_t len = strlen (str); | |
4857 | std::string lookup; | |
4858 | ||
4859 | for (size_t i = 1; i < len; i++) | |
4860 | { | |
4861 | lookup.assign (str, i); | |
4862 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4863 | EXPECT (Z_SYM_NAME)); | |
4864 | } | |
4865 | } | |
4866 | ||
4867 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4868 | { | |
4869 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4870 | {}); | |
4871 | } | |
4872 | ||
4873 | /* A complete symbol with parameters matches any overload, since the | |
4874 | index has no overload info. */ | |
4875 | { | |
4876 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4877 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4878 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4879 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4880 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4881 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4882 | } |
4883 | ||
4884 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4885 | template argument list. */ | |
4886 | { | |
4887 | static const char expected[] = "ns::foo<int>"; | |
4888 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4889 | EXPECT (expected)); | |
a20714ff PA |
4890 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4891 | EXPECT (expected)); | |
c62446b1 PA |
4892 | } |
4893 | ||
4894 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4895 | template argument list that includes a pointer. */ | |
4896 | { | |
4897 | static const char expected[] = "ns::foo<char*>"; | |
4898 | /* Try both completion and non-completion modes. */ | |
4899 | static const bool completion_mode[2] = {false, true}; | |
4900 | for (size_t i = 0; i < 2; i++) | |
4901 | { | |
4902 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4903 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4904 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4905 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4906 | |
4907 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4908 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4909 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4910 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4911 | } |
4912 | } | |
4913 | ||
4914 | { | |
4915 | /* Check method qualifiers are ignored. */ | |
4916 | static const char expected[] = "ns::foo<char*>"; | |
4917 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4918 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4919 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4920 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4921 | CHECK_MATCH ("foo < char * > ( int ) const", |
4922 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4923 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4924 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4925 | } |
4926 | ||
4927 | /* Test lookup names that don't match anything. */ | |
4928 | { | |
a20714ff PA |
4929 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4930 | {}); | |
4931 | ||
c62446b1 PA |
4932 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4933 | {}); | |
4934 | } | |
4935 | ||
a20714ff PA |
4936 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4937 | which should not be confused with a parameter list. */ | |
4938 | { | |
4939 | static const char *syms[] = { | |
4940 | "A::B::C", | |
4941 | "B::C", | |
4942 | "C", | |
4943 | "A :: B :: C ( int )", | |
4944 | "B :: C ( int )", | |
4945 | "C ( int )", | |
4946 | }; | |
4947 | ||
4948 | for (const char *s : syms) | |
4949 | { | |
4950 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4951 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4952 | } | |
4953 | } | |
4954 | ||
4955 | { | |
4956 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4957 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4958 | EXPECT (expected)); | |
4959 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4960 | EXPECT (expected)); | |
4961 | } | |
4962 | ||
c62446b1 PA |
4963 | SELF_CHECK (!any_mismatch); |
4964 | ||
4965 | #undef EXPECT | |
4966 | #undef CHECK_MATCH | |
4967 | } | |
4968 | ||
5c58de74 PA |
4969 | static void |
4970 | run_test () | |
4971 | { | |
4972 | test_mapped_index_find_name_component_bounds (); | |
4973 | test_dw2_expand_symtabs_matching_symbol (); | |
4974 | } | |
4975 | ||
c62446b1 PA |
4976 | }} // namespace selftests::dw2_expand_symtabs_matching |
4977 | ||
4978 | #endif /* GDB_SELF_TEST */ | |
4979 | ||
4b514bc8 JK |
4980 | /* If FILE_MATCHER is NULL or if PER_CU has |
4981 | dwarf2_per_cu_quick_data::MARK set (see | |
4982 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4983 | EXPANSION_NOTIFY on it. */ | |
4984 | ||
4985 | static void | |
4986 | dw2_expand_symtabs_matching_one | |
4987 | (struct dwarf2_per_cu_data *per_cu, | |
4988 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4989 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4990 | { | |
4991 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4992 | { | |
4993 | bool symtab_was_null | |
4994 | = (per_cu->v.quick->compunit_symtab == NULL); | |
4995 | ||
58f0c718 | 4996 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
4997 | |
4998 | if (expansion_notify != NULL | |
4999 | && symtab_was_null | |
5000 | && per_cu->v.quick->compunit_symtab != NULL) | |
5001 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
5002 | } | |
5003 | } | |
5004 | ||
3f563c84 PA |
5005 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
5006 | matched, to expand corresponding CUs that were marked. IDX is the | |
5007 | index of the symbol name that matched. */ | |
5008 | ||
5009 | static void | |
5010 | dw2_expand_marked_cus | |
ed2dc618 | 5011 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
5012 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
5013 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5014 | search_domain kind) | |
5015 | { | |
3f563c84 PA |
5016 | offset_type *vec, vec_len, vec_idx; |
5017 | bool global_seen = false; | |
ed2dc618 | 5018 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 5019 | |
61920122 | 5020 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 5021 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
5022 | vec_len = MAYBE_SWAP (vec[0]); |
5023 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
5024 | { | |
61920122 PA |
5025 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
5026 | /* This value is only valid for index versions >= 7. */ | |
5027 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
5028 | gdb_index_symbol_kind symbol_kind = | |
5029 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
5030 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
5031 | /* Only check the symbol attributes if they're present. | |
5032 | Indices prior to version 7 don't record them, | |
5033 | and indices >= 7 may elide them for certain symbols | |
5034 | (gold does this). */ | |
5035 | int attrs_valid = | |
5036 | (index.version >= 7 | |
5037 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
5038 | ||
5039 | /* Work around gold/15646. */ | |
5040 | if (attrs_valid) | |
9291a0cd | 5041 | { |
61920122 PA |
5042 | if (!is_static && global_seen) |
5043 | continue; | |
5044 | if (!is_static) | |
5045 | global_seen = true; | |
5046 | } | |
3190f0c6 | 5047 | |
61920122 PA |
5048 | /* Only check the symbol's kind if it has one. */ |
5049 | if (attrs_valid) | |
5050 | { | |
5051 | switch (kind) | |
8943b874 | 5052 | { |
61920122 PA |
5053 | case VARIABLES_DOMAIN: |
5054 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
5055 | continue; | |
5056 | break; | |
5057 | case FUNCTIONS_DOMAIN: | |
5058 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 5059 | continue; |
61920122 PA |
5060 | break; |
5061 | case TYPES_DOMAIN: | |
5062 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
5063 | continue; | |
5064 | break; | |
59c35742 AB |
5065 | case MODULES_DOMAIN: |
5066 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
5067 | continue; | |
5068 | break; | |
61920122 PA |
5069 | default: |
5070 | break; | |
8943b874 | 5071 | } |
61920122 | 5072 | } |
8943b874 | 5073 | |
61920122 | 5074 | /* Don't crash on bad data. */ |
b76e467d | 5075 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5076 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 5077 | { |
b98664d3 | 5078 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
5079 | " [in module %s]"), |
5080 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
5081 | continue; |
5082 | } | |
5083 | ||
ff4c9fec | 5084 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
5085 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
5086 | expansion_notify); | |
61920122 PA |
5087 | } |
5088 | } | |
5089 | ||
4b514bc8 JK |
5090 | /* If FILE_MATCHER is non-NULL, set all the |
5091 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
5092 | that match FILE_MATCHER. */ | |
5093 | ||
61920122 | 5094 | static void |
4b514bc8 | 5095 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
5096 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5097 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 5098 | { |
4b514bc8 | 5099 | if (file_matcher == NULL) |
61920122 PA |
5100 | return; |
5101 | ||
4b514bc8 JK |
5102 | objfile *const objfile = dwarf2_per_objfile->objfile; |
5103 | ||
5104 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
5105 | htab_eq_pointer, | |
5106 | NULL, xcalloc, xfree)); | |
5107 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
5108 | htab_eq_pointer, |
5109 | NULL, xcalloc, xfree)); | |
61920122 | 5110 | |
4b514bc8 JK |
5111 | /* The rule is CUs specify all the files, including those used by |
5112 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 5113 | |
b76e467d | 5114 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5115 | { |
927aa2e7 JK |
5116 | QUIT; |
5117 | ||
5118 | per_cu->v.quick->mark = 0; | |
5119 | ||
5120 | /* We only need to look at symtabs not already expanded. */ | |
5121 | if (per_cu->v.quick->compunit_symtab) | |
5122 | continue; | |
5123 | ||
b76e467d | 5124 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5125 | if (file_data == NULL) |
5126 | continue; | |
5127 | ||
5128 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
5129 | continue; | |
5130 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
5131 | { | |
5132 | per_cu->v.quick->mark = 1; | |
5133 | continue; | |
5134 | } | |
5135 | ||
b76e467d | 5136 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
5137 | { |
5138 | const char *this_real_name; | |
5139 | ||
5140 | if (file_matcher (file_data->file_names[j], false)) | |
5141 | { | |
5142 | per_cu->v.quick->mark = 1; | |
5143 | break; | |
5144 | } | |
5145 | ||
5146 | /* Before we invoke realpath, which can get expensive when many | |
5147 | files are involved, do a quick comparison of the basenames. */ | |
5148 | if (!basenames_may_differ | |
5149 | && !file_matcher (lbasename (file_data->file_names[j]), | |
5150 | true)) | |
5151 | continue; | |
5152 | ||
5153 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
5154 | if (file_matcher (this_real_name, false)) | |
5155 | { | |
5156 | per_cu->v.quick->mark = 1; | |
5157 | break; | |
5158 | } | |
5159 | } | |
5160 | ||
b76e467d SM |
5161 | void **slot = htab_find_slot (per_cu->v.quick->mark |
5162 | ? visited_found.get () | |
5163 | : visited_not_found.get (), | |
5164 | file_data, INSERT); | |
927aa2e7 JK |
5165 | *slot = file_data; |
5166 | } | |
5167 | } | |
5168 | ||
5169 | static void | |
5170 | dw2_expand_symtabs_matching | |
5171 | (struct objfile *objfile, | |
5172 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5173 | const lookup_name_info &lookup_name, | |
5174 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5175 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5176 | enum search_domain kind) | |
5177 | { | |
ed2dc618 SM |
5178 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5179 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5180 | |
5181 | /* index_table is NULL if OBJF_READNOW. */ | |
5182 | if (!dwarf2_per_objfile->index_table) | |
5183 | return; | |
5184 | ||
ed2dc618 | 5185 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
5186 | |
5187 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
5188 | ||
5189 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
5190 | symbol_matcher, | |
5191 | kind, [&] (offset_type idx) | |
5192 | { | |
ed2dc618 | 5193 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 | 5194 | expansion_notify, kind); |
3b00ef10 | 5195 | return true; |
927aa2e7 JK |
5196 | }); |
5197 | } | |
5198 | ||
5199 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
5200 | symtab. */ | |
5201 | ||
5202 | static struct compunit_symtab * | |
5203 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
5204 | CORE_ADDR pc) | |
5205 | { | |
5206 | int i; | |
5207 | ||
5208 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
5209 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
5210 | return cust; | |
5211 | ||
5212 | if (cust->includes == NULL) | |
5213 | return NULL; | |
5214 | ||
5215 | for (i = 0; cust->includes[i]; ++i) | |
5216 | { | |
5217 | struct compunit_symtab *s = cust->includes[i]; | |
5218 | ||
5219 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
5220 | if (s != NULL) | |
5221 | return s; | |
5222 | } | |
5223 | ||
5224 | return NULL; | |
5225 | } | |
5226 | ||
5227 | static struct compunit_symtab * | |
5228 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
5229 | struct bound_minimal_symbol msymbol, | |
5230 | CORE_ADDR pc, | |
5231 | struct obj_section *section, | |
5232 | int warn_if_readin) | |
5233 | { | |
5234 | struct dwarf2_per_cu_data *data; | |
5235 | struct compunit_symtab *result; | |
5236 | ||
d320c2b5 | 5237 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
5238 | return NULL; |
5239 | ||
6a053cb1 | 5240 | CORE_ADDR baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
d320c2b5 TT |
5241 | data = (struct dwarf2_per_cu_data *) addrmap_find |
5242 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
5243 | if (!data) |
5244 | return NULL; | |
5245 | ||
5246 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
5247 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
5248 | paddress (get_objfile_arch (objfile), pc)); | |
5249 | ||
5250 | result | |
58f0c718 TT |
5251 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
5252 | false), | |
927aa2e7 JK |
5253 | pc); |
5254 | gdb_assert (result != NULL); | |
5255 | return result; | |
5256 | } | |
5257 | ||
5258 | static void | |
5259 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
5260 | void *data, int need_fullname) | |
5261 | { | |
ed2dc618 SM |
5262 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5263 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
5264 | |
5265 | if (!dwarf2_per_objfile->filenames_cache) | |
5266 | { | |
5267 | dwarf2_per_objfile->filenames_cache.emplace (); | |
5268 | ||
5269 | htab_up visited (htab_create_alloc (10, | |
5270 | htab_hash_pointer, htab_eq_pointer, | |
5271 | NULL, xcalloc, xfree)); | |
5272 | ||
5273 | /* The rule is CUs specify all the files, including those used | |
5274 | by any TU, so there's no need to scan TUs here. We can | |
5275 | ignore file names coming from already-expanded CUs. */ | |
5276 | ||
b76e467d | 5277 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5278 | { |
927aa2e7 JK |
5279 | if (per_cu->v.quick->compunit_symtab) |
5280 | { | |
5281 | void **slot = htab_find_slot (visited.get (), | |
5282 | per_cu->v.quick->file_names, | |
5283 | INSERT); | |
5284 | ||
5285 | *slot = per_cu->v.quick->file_names; | |
5286 | } | |
5287 | } | |
5288 | ||
b76e467d | 5289 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 5290 | { |
927aa2e7 JK |
5291 | /* We only need to look at symtabs not already expanded. */ |
5292 | if (per_cu->v.quick->compunit_symtab) | |
5293 | continue; | |
5294 | ||
b76e467d | 5295 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
5296 | if (file_data == NULL) |
5297 | continue; | |
5298 | ||
b76e467d | 5299 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
5300 | if (*slot) |
5301 | { | |
5302 | /* Already visited. */ | |
5303 | continue; | |
5304 | } | |
5305 | *slot = file_data; | |
5306 | ||
5307 | for (int j = 0; j < file_data->num_file_names; ++j) | |
5308 | { | |
5309 | const char *filename = file_data->file_names[j]; | |
5310 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
5311 | } | |
5312 | } | |
5313 | } | |
5314 | ||
5315 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
5316 | { | |
5317 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
5318 | ||
5319 | if (need_fullname) | |
5320 | this_real_name = gdb_realpath (filename); | |
5321 | (*fun) (filename, this_real_name.get (), data); | |
5322 | }); | |
5323 | } | |
5324 | ||
5325 | static int | |
5326 | dw2_has_symbols (struct objfile *objfile) | |
5327 | { | |
5328 | return 1; | |
5329 | } | |
5330 | ||
5331 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
5332 | { | |
5333 | dw2_has_symbols, | |
5334 | dw2_find_last_source_symtab, | |
5335 | dw2_forget_cached_source_info, | |
5336 | dw2_map_symtabs_matching_filename, | |
5337 | dw2_lookup_symbol, | |
5338 | dw2_print_stats, | |
5339 | dw2_dump, | |
927aa2e7 JK |
5340 | dw2_expand_symtabs_for_function, |
5341 | dw2_expand_all_symtabs, | |
5342 | dw2_expand_symtabs_with_fullname, | |
5343 | dw2_map_matching_symbols, | |
5344 | dw2_expand_symtabs_matching, | |
5345 | dw2_find_pc_sect_compunit_symtab, | |
5346 | NULL, | |
5347 | dw2_map_symbol_filenames | |
5348 | }; | |
5349 | ||
5350 | /* DWARF-5 debug_names reader. */ | |
5351 | ||
5352 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
5353 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
5354 | ||
5355 | /* A helper function that reads the .debug_names section in SECTION | |
5356 | and fills in MAP. FILENAME is the name of the file containing the | |
5357 | section; it is used for error reporting. | |
5358 | ||
5359 | Returns true if all went well, false otherwise. */ | |
5360 | ||
5361 | static bool | |
5362 | read_debug_names_from_section (struct objfile *objfile, | |
5363 | const char *filename, | |
5364 | struct dwarf2_section_info *section, | |
5365 | mapped_debug_names &map) | |
5366 | { | |
5367 | if (dwarf2_section_empty_p (section)) | |
5368 | return false; | |
5369 | ||
5370 | /* Older elfutils strip versions could keep the section in the main | |
5371 | executable while splitting it for the separate debug info file. */ | |
5372 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
5373 | return false; | |
5374 | ||
5375 | dwarf2_read_section (objfile, section); | |
5376 | ||
5377 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
5378 | ||
5379 | const gdb_byte *addr = section->buffer; | |
5380 | ||
5381 | bfd *const abfd = get_section_bfd_owner (section); | |
5382 | ||
5383 | unsigned int bytes_read; | |
5384 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
5385 | addr += bytes_read; | |
5386 | ||
5387 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
5388 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
5389 | if (bytes_read + length != section->size) | |
5390 | { | |
5391 | /* There may be multiple per-CU indices. */ | |
5392 | warning (_("Section .debug_names in %s length %s does not match " | |
5393 | "section length %s, ignoring .debug_names."), | |
5394 | filename, plongest (bytes_read + length), | |
5395 | pulongest (section->size)); | |
5396 | return false; | |
5397 | } | |
5398 | ||
5399 | /* The version number. */ | |
5400 | uint16_t version = read_2_bytes (abfd, addr); | |
5401 | addr += 2; | |
5402 | if (version != 5) | |
5403 | { | |
5404 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
5405 | "ignoring .debug_names."), | |
5406 | filename, version); | |
5407 | return false; | |
5408 | } | |
5409 | ||
5410 | /* Padding. */ | |
5411 | uint16_t padding = read_2_bytes (abfd, addr); | |
5412 | addr += 2; | |
5413 | if (padding != 0) | |
5414 | { | |
5415 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
5416 | "ignoring .debug_names."), | |
5417 | filename, padding); | |
5418 | return false; | |
5419 | } | |
5420 | ||
5421 | /* comp_unit_count - The number of CUs in the CU list. */ | |
5422 | map.cu_count = read_4_bytes (abfd, addr); | |
5423 | addr += 4; | |
5424 | ||
5425 | /* local_type_unit_count - The number of TUs in the local TU | |
5426 | list. */ | |
5427 | map.tu_count = read_4_bytes (abfd, addr); | |
5428 | addr += 4; | |
5429 | ||
5430 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
5431 | list. */ | |
5432 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
5433 | addr += 4; | |
5434 | if (foreign_tu_count != 0) | |
5435 | { | |
5436 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
5437 | "ignoring .debug_names."), | |
5438 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
5439 | return false; | |
5440 | } | |
5441 | ||
5442 | /* bucket_count - The number of hash buckets in the hash lookup | |
5443 | table. */ | |
5444 | map.bucket_count = read_4_bytes (abfd, addr); | |
5445 | addr += 4; | |
5446 | ||
5447 | /* name_count - The number of unique names in the index. */ | |
5448 | map.name_count = read_4_bytes (abfd, addr); | |
5449 | addr += 4; | |
5450 | ||
5451 | /* abbrev_table_size - The size in bytes of the abbreviations | |
5452 | table. */ | |
5453 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
5454 | addr += 4; | |
5455 | ||
5456 | /* augmentation_string_size - The size in bytes of the augmentation | |
5457 | string. This value is rounded up to a multiple of 4. */ | |
5458 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
5459 | addr += 4; | |
5460 | map.augmentation_is_gdb = ((augmentation_string_size | |
5461 | == sizeof (dwarf5_augmentation)) | |
5462 | && memcmp (addr, dwarf5_augmentation, | |
5463 | sizeof (dwarf5_augmentation)) == 0); | |
5464 | augmentation_string_size += (-augmentation_string_size) & 3; | |
5465 | addr += augmentation_string_size; | |
5466 | ||
5467 | /* List of CUs */ | |
5468 | map.cu_table_reordered = addr; | |
5469 | addr += map.cu_count * map.offset_size; | |
5470 | ||
5471 | /* List of Local TUs */ | |
5472 | map.tu_table_reordered = addr; | |
5473 | addr += map.tu_count * map.offset_size; | |
5474 | ||
5475 | /* Hash Lookup Table */ | |
5476 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5477 | addr += map.bucket_count * 4; | |
5478 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
5479 | addr += map.name_count * 4; | |
5480 | ||
5481 | /* Name Table */ | |
5482 | map.name_table_string_offs_reordered = addr; | |
5483 | addr += map.name_count * map.offset_size; | |
5484 | map.name_table_entry_offs_reordered = addr; | |
5485 | addr += map.name_count * map.offset_size; | |
5486 | ||
5487 | const gdb_byte *abbrev_table_start = addr; | |
5488 | for (;;) | |
5489 | { | |
927aa2e7 JK |
5490 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
5491 | addr += bytes_read; | |
5492 | if (index_num == 0) | |
5493 | break; | |
5494 | ||
5495 | const auto insertpair | |
5496 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
5497 | if (!insertpair.second) | |
5498 | { | |
5499 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
5500 | "ignoring .debug_names."), | |
5501 | filename, pulongest (index_num)); | |
5502 | return false; | |
5503 | } | |
5504 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
5505 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5506 | addr += bytes_read; | |
5507 | ||
5508 | for (;;) | |
5509 | { | |
5510 | mapped_debug_names::index_val::attr attr; | |
5511 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5512 | addr += bytes_read; | |
5513 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
5514 | addr += bytes_read; | |
5515 | if (attr.form == DW_FORM_implicit_const) | |
5516 | { | |
5517 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
5518 | &bytes_read); | |
5519 | addr += bytes_read; | |
5520 | } | |
5521 | if (attr.dw_idx == 0 && attr.form == 0) | |
5522 | break; | |
5523 | indexval.attr_vec.push_back (std::move (attr)); | |
5524 | } | |
5525 | } | |
5526 | if (addr != abbrev_table_start + abbrev_table_size) | |
5527 | { | |
5528 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
5529 | "of size %s vs. written as %u, ignoring .debug_names."), |
5530 | filename, plongest (addr - abbrev_table_start), | |
5531 | abbrev_table_size); | |
927aa2e7 JK |
5532 | return false; |
5533 | } | |
5534 | map.entry_pool = addr; | |
5535 | ||
5536 | return true; | |
5537 | } | |
5538 | ||
5539 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
5540 | list. */ | |
5541 | ||
5542 | static void | |
ed2dc618 | 5543 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5544 | const mapped_debug_names &map, |
5545 | dwarf2_section_info §ion, | |
b76e467d | 5546 | bool is_dwz) |
927aa2e7 JK |
5547 | { |
5548 | sect_offset sect_off_prev; | |
5549 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
5550 | { | |
5551 | sect_offset sect_off_next; | |
5552 | if (i < map.cu_count) | |
5553 | { | |
5554 | sect_off_next | |
5555 | = (sect_offset) (extract_unsigned_integer | |
5556 | (map.cu_table_reordered + i * map.offset_size, | |
5557 | map.offset_size, | |
5558 | map.dwarf5_byte_order)); | |
5559 | } | |
5560 | else | |
5561 | sect_off_next = (sect_offset) section.size; | |
5562 | if (i >= 1) | |
5563 | { | |
5564 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5565 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5566 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5567 | sect_off_prev, length); |
b76e467d | 5568 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5569 | } |
5570 | sect_off_prev = sect_off_next; | |
5571 | } | |
5572 | } | |
5573 | ||
5574 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5575 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5576 | |
5577 | static void | |
ed2dc618 | 5578 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5579 | const mapped_debug_names &map, |
5580 | const mapped_debug_names &dwz_map) | |
5581 | { | |
b76e467d SM |
5582 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5583 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5584 | |
ed2dc618 SM |
5585 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5586 | dwarf2_per_objfile->info, | |
b76e467d | 5587 | false /* is_dwz */); |
927aa2e7 JK |
5588 | |
5589 | if (dwz_map.cu_count == 0) | |
5590 | return; | |
5591 | ||
ed2dc618 SM |
5592 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5593 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5594 | true /* is_dwz */); |
927aa2e7 JK |
5595 | } |
5596 | ||
5597 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5598 | elements of all the CUs and return true. Otherwise, return false. */ | |
5599 | ||
5600 | static bool | |
ed2dc618 | 5601 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5602 | { |
22ca247e TT |
5603 | std::unique_ptr<mapped_debug_names> map |
5604 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5605 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5606 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5607 | |
5608 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5609 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5610 | *map)) |
927aa2e7 JK |
5611 | return false; |
5612 | ||
5613 | /* Don't use the index if it's empty. */ | |
22ca247e | 5614 | if (map->name_count == 0) |
927aa2e7 JK |
5615 | return false; |
5616 | ||
5617 | /* If there is a .dwz file, read it so we can get its CU list as | |
5618 | well. */ | |
ed2dc618 | 5619 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5620 | if (dwz != NULL) |
5621 | { | |
5622 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 5623 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
5624 | &dwz->debug_names, dwz_map)) |
5625 | { | |
5626 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 5627 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
5628 | return false; |
5629 | } | |
5630 | } | |
5631 | ||
22ca247e | 5632 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5633 | |
22ca247e | 5634 | if (map->tu_count != 0) |
927aa2e7 JK |
5635 | { |
5636 | /* We can only handle a single .debug_types when we have an | |
5637 | index. */ | |
fd5866f6 | 5638 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5639 | return false; |
5640 | ||
fd5866f6 | 5641 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5642 | |
5643 | create_signatured_type_table_from_debug_names | |
22ca247e | 5644 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5645 | } |
5646 | ||
ed2dc618 SM |
5647 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5648 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5649 | |
22ca247e | 5650 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5651 | dwarf2_per_objfile->using_index = 1; |
5652 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5653 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5654 | |
5655 | return true; | |
5656 | } | |
5657 | ||
927aa2e7 JK |
5658 | /* Type used to manage iterating over all CUs looking for a symbol for |
5659 | .debug_names. */ | |
5660 | ||
5661 | class dw2_debug_names_iterator | |
5662 | { | |
5663 | public: | |
927aa2e7 | 5664 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5665 | gdb::optional<block_enum> block_index, |
5666 | domain_enum domain, | |
927aa2e7 | 5667 | const char *name) |
2b79f376 | 5668 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5669 | m_addr (find_vec_in_debug_names (map, name)) |
5670 | {} | |
5671 | ||
5672 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5673 | search_domain search, uint32_t namei) | |
5674 | : m_map (map), | |
5675 | m_search (search), | |
5676 | m_addr (find_vec_in_debug_names (map, namei)) | |
5677 | {} | |
5678 | ||
3b00ef10 TT |
5679 | dw2_debug_names_iterator (const mapped_debug_names &map, |
5680 | block_enum block_index, domain_enum domain, | |
5681 | uint32_t namei) | |
5682 | : m_map (map), m_block_index (block_index), m_domain (domain), | |
5683 | m_addr (find_vec_in_debug_names (map, namei)) | |
5684 | {} | |
5685 | ||
927aa2e7 JK |
5686 | /* Return the next matching CU or NULL if there are no more. */ |
5687 | dwarf2_per_cu_data *next (); | |
5688 | ||
5689 | private: | |
5690 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5691 | const char *name); | |
5692 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5693 | uint32_t namei); | |
5694 | ||
5695 | /* The internalized form of .debug_names. */ | |
5696 | const mapped_debug_names &m_map; | |
5697 | ||
2b79f376 SM |
5698 | /* If set, only look for symbols that match that block. Valid values are |
5699 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5700 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5701 | |
5702 | /* The kind of symbol we're looking for. */ | |
5703 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5704 | const search_domain m_search = ALL_DOMAIN; | |
5705 | ||
5706 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5707 | not found. */ | |
5708 | const gdb_byte *m_addr; | |
5709 | }; | |
5710 | ||
5711 | const char * | |
5712 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5713 | { | |
5714 | const ULONGEST namei_string_offs | |
5715 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5716 | + namei * offset_size), | |
5717 | offset_size, | |
5718 | dwarf5_byte_order); | |
5719 | return read_indirect_string_at_offset | |
ed2dc618 | 5720 | (dwarf2_per_objfile, dwarf2_per_objfile->objfile->obfd, namei_string_offs); |
927aa2e7 JK |
5721 | } |
5722 | ||
5723 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5724 | found, return pointer to its pool data. If NAME cannot be found, | |
5725 | return NULL. */ | |
5726 | ||
5727 | const gdb_byte * | |
5728 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5729 | (const mapped_debug_names &map, const char *name) | |
5730 | { | |
5731 | int (*cmp) (const char *, const char *); | |
5732 | ||
54ee4252 | 5733 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5734 | if (current_language->la_language == language_cplus |
5735 | || current_language->la_language == language_fortran | |
5736 | || current_language->la_language == language_d) | |
5737 | { | |
5738 | /* NAME is already canonical. Drop any qualifiers as | |
5739 | .debug_names does not contain any. */ | |
5740 | ||
5741 | if (strchr (name, '(') != NULL) | |
5742 | { | |
54ee4252 | 5743 | without_params = cp_remove_params (name); |
927aa2e7 | 5744 | if (without_params != NULL) |
54ee4252 | 5745 | name = without_params.get (); |
927aa2e7 JK |
5746 | } |
5747 | } | |
5748 | ||
5749 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5750 | ||
5751 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5752 | uint32_t namei | |
5753 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5754 | (map.bucket_table_reordered | |
5755 | + (full_hash % map.bucket_count)), 4, | |
5756 | map.dwarf5_byte_order); | |
5757 | if (namei == 0) | |
5758 | return NULL; | |
5759 | --namei; | |
5760 | if (namei >= map.name_count) | |
5761 | { | |
b98664d3 | 5762 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5763 | "[in module %s]"), |
5764 | namei, map.name_count, | |
ed2dc618 | 5765 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5766 | return NULL; |
5767 | } | |
5768 | ||
5769 | for (;;) | |
5770 | { | |
5771 | const uint32_t namei_full_hash | |
5772 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5773 | (map.hash_table_reordered + namei), 4, | |
5774 | map.dwarf5_byte_order); | |
5775 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5776 | return NULL; | |
5777 | ||
5778 | if (full_hash == namei_full_hash) | |
5779 | { | |
5780 | const char *const namei_string = map.namei_to_name (namei); | |
5781 | ||
5782 | #if 0 /* An expensive sanity check. */ | |
5783 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5784 | { | |
b98664d3 | 5785 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5786 | "[in module %s]"), |
5787 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5788 | return NULL; | |
5789 | } | |
5790 | #endif | |
5791 | ||
5792 | if (cmp (namei_string, name) == 0) | |
5793 | { | |
5794 | const ULONGEST namei_entry_offs | |
5795 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5796 | + namei * map.offset_size), | |
5797 | map.offset_size, map.dwarf5_byte_order); | |
5798 | return map.entry_pool + namei_entry_offs; | |
5799 | } | |
5800 | } | |
5801 | ||
5802 | ++namei; | |
5803 | if (namei >= map.name_count) | |
5804 | return NULL; | |
5805 | } | |
5806 | } | |
5807 | ||
5808 | const gdb_byte * | |
5809 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5810 | (const mapped_debug_names &map, uint32_t namei) | |
5811 | { | |
5812 | if (namei >= map.name_count) | |
5813 | { | |
b98664d3 | 5814 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5815 | "[in module %s]"), |
5816 | namei, map.name_count, | |
ed2dc618 | 5817 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5818 | return NULL; |
5819 | } | |
5820 | ||
5821 | const ULONGEST namei_entry_offs | |
5822 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5823 | + namei * map.offset_size), | |
5824 | map.offset_size, map.dwarf5_byte_order); | |
5825 | return map.entry_pool + namei_entry_offs; | |
5826 | } | |
5827 | ||
5828 | /* See dw2_debug_names_iterator. */ | |
5829 | ||
5830 | dwarf2_per_cu_data * | |
5831 | dw2_debug_names_iterator::next () | |
5832 | { | |
5833 | if (m_addr == NULL) | |
5834 | return NULL; | |
5835 | ||
ed2dc618 SM |
5836 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5837 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5838 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5839 | |
5840 | again: | |
5841 | ||
5842 | unsigned int bytes_read; | |
5843 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5844 | m_addr += bytes_read; | |
5845 | if (abbrev == 0) | |
5846 | return NULL; | |
5847 | ||
5848 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5849 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5850 | { | |
b98664d3 | 5851 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5852 | "[in module %s]"), |
ed2dc618 | 5853 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5854 | return NULL; |
5855 | } | |
5856 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5857 | enum class symbol_linkage { |
5858 | unknown, | |
5859 | static_, | |
5860 | extern_, | |
23c13d42 | 5861 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5862 | dwarf2_per_cu_data *per_cu = NULL; |
5863 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5864 | { | |
5865 | ULONGEST ull; | |
5866 | switch (attr.form) | |
5867 | { | |
5868 | case DW_FORM_implicit_const: | |
5869 | ull = attr.implicit_const; | |
5870 | break; | |
5871 | case DW_FORM_flag_present: | |
5872 | ull = 1; | |
5873 | break; | |
5874 | case DW_FORM_udata: | |
5875 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5876 | m_addr += bytes_read; | |
5877 | break; | |
5878 | default: | |
b98664d3 | 5879 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5880 | dwarf_form_name (attr.form), |
ed2dc618 | 5881 | objfile_name (objfile)); |
927aa2e7 JK |
5882 | return NULL; |
5883 | } | |
5884 | switch (attr.dw_idx) | |
5885 | { | |
5886 | case DW_IDX_compile_unit: | |
5887 | /* Don't crash on bad data. */ | |
b76e467d | 5888 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5889 | { |
b98664d3 | 5890 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5891 | " [in module %s]"), |
5892 | pulongest (ull), | |
5893 | objfile_name (dwarf2_per_objfile->objfile)); | |
5894 | continue; | |
5895 | } | |
ff4c9fec | 5896 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5897 | break; |
8af5c486 JK |
5898 | case DW_IDX_type_unit: |
5899 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5900 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5901 | { |
b98664d3 | 5902 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5903 | " [in module %s]"), |
5904 | pulongest (ull), | |
5905 | objfile_name (dwarf2_per_objfile->objfile)); | |
5906 | continue; | |
5907 | } | |
ff4c9fec | 5908 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5909 | break; |
927aa2e7 JK |
5910 | case DW_IDX_GNU_internal: |
5911 | if (!m_map.augmentation_is_gdb) | |
5912 | break; | |
23c13d42 | 5913 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5914 | break; |
5915 | case DW_IDX_GNU_external: | |
5916 | if (!m_map.augmentation_is_gdb) | |
5917 | break; | |
23c13d42 | 5918 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5919 | break; |
5920 | } | |
5921 | } | |
5922 | ||
5923 | /* Skip if already read in. */ | |
5924 | if (per_cu->v.quick->compunit_symtab) | |
5925 | goto again; | |
5926 | ||
5927 | /* Check static vs global. */ | |
23c13d42 | 5928 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5929 | { |
2b79f376 | 5930 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5931 | const bool symbol_is_static = |
5932 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5933 | if (want_static != symbol_is_static) |
2b79f376 | 5934 | goto again; |
927aa2e7 JK |
5935 | } |
5936 | ||
5937 | /* Match dw2_symtab_iter_next, symbol_kind | |
5938 | and debug_names::psymbol_tag. */ | |
5939 | switch (m_domain) | |
5940 | { | |
5941 | case VAR_DOMAIN: | |
5942 | switch (indexval.dwarf_tag) | |
5943 | { | |
5944 | case DW_TAG_variable: | |
5945 | case DW_TAG_subprogram: | |
5946 | /* Some types are also in VAR_DOMAIN. */ | |
5947 | case DW_TAG_typedef: | |
5948 | case DW_TAG_structure_type: | |
5949 | break; | |
5950 | default: | |
5951 | goto again; | |
5952 | } | |
5953 | break; | |
5954 | case STRUCT_DOMAIN: | |
5955 | switch (indexval.dwarf_tag) | |
5956 | { | |
5957 | case DW_TAG_typedef: | |
5958 | case DW_TAG_structure_type: | |
5959 | break; | |
5960 | default: | |
5961 | goto again; | |
5962 | } | |
5963 | break; | |
5964 | case LABEL_DOMAIN: | |
5965 | switch (indexval.dwarf_tag) | |
5966 | { | |
5967 | case 0: | |
5968 | case DW_TAG_variable: | |
5969 | break; | |
5970 | default: | |
5971 | goto again; | |
5972 | } | |
5973 | break; | |
59c35742 AB |
5974 | case MODULE_DOMAIN: |
5975 | switch (indexval.dwarf_tag) | |
5976 | { | |
5977 | case DW_TAG_module: | |
5978 | break; | |
5979 | default: | |
5980 | goto again; | |
5981 | } | |
5982 | break; | |
927aa2e7 JK |
5983 | default: |
5984 | break; | |
5985 | } | |
5986 | ||
5987 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5988 | debug_names::psymbol_tag. */ | |
5989 | switch (m_search) | |
4b514bc8 | 5990 | { |
927aa2e7 JK |
5991 | case VARIABLES_DOMAIN: |
5992 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5993 | { |
927aa2e7 JK |
5994 | case DW_TAG_variable: |
5995 | break; | |
5996 | default: | |
5997 | goto again; | |
4b514bc8 | 5998 | } |
927aa2e7 JK |
5999 | break; |
6000 | case FUNCTIONS_DOMAIN: | |
6001 | switch (indexval.dwarf_tag) | |
4b514bc8 | 6002 | { |
927aa2e7 JK |
6003 | case DW_TAG_subprogram: |
6004 | break; | |
6005 | default: | |
6006 | goto again; | |
4b514bc8 | 6007 | } |
927aa2e7 JK |
6008 | break; |
6009 | case TYPES_DOMAIN: | |
6010 | switch (indexval.dwarf_tag) | |
6011 | { | |
6012 | case DW_TAG_typedef: | |
6013 | case DW_TAG_structure_type: | |
6014 | break; | |
6015 | default: | |
6016 | goto again; | |
6017 | } | |
6018 | break; | |
59c35742 AB |
6019 | case MODULES_DOMAIN: |
6020 | switch (indexval.dwarf_tag) | |
6021 | { | |
6022 | case DW_TAG_module: | |
6023 | break; | |
6024 | default: | |
6025 | goto again; | |
6026 | } | |
927aa2e7 JK |
6027 | default: |
6028 | break; | |
4b514bc8 | 6029 | } |
927aa2e7 JK |
6030 | |
6031 | return per_cu; | |
4b514bc8 | 6032 | } |
61920122 | 6033 | |
927aa2e7 | 6034 | static struct compunit_symtab * |
c7f839cb | 6035 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 6036 | const char *name, domain_enum domain) |
4b514bc8 | 6037 | { |
ed2dc618 SM |
6038 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6039 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 6040 | |
927aa2e7 JK |
6041 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
6042 | if (!mapp) | |
61920122 | 6043 | { |
927aa2e7 JK |
6044 | /* index is NULL if OBJF_READNOW. */ |
6045 | return NULL; | |
6046 | } | |
6047 | const auto &map = *mapp; | |
9291a0cd | 6048 | |
2b79f376 | 6049 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 6050 | |
927aa2e7 JK |
6051 | struct compunit_symtab *stab_best = NULL; |
6052 | struct dwarf2_per_cu_data *per_cu; | |
6053 | while ((per_cu = iter.next ()) != NULL) | |
6054 | { | |
6055 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 6056 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 6057 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 6058 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 6059 | |
927aa2e7 JK |
6060 | sym = block_find_symbol (block, name, domain, |
6061 | block_find_non_opaque_type_preferred, | |
6062 | &with_opaque); | |
9703b513 | 6063 | |
927aa2e7 JK |
6064 | /* Some caution must be observed with overloaded functions and |
6065 | methods, since the index will not contain any overload | |
6066 | information (but NAME might contain it). */ | |
a3ec0bb1 | 6067 | |
927aa2e7 | 6068 | if (sym != NULL |
987012b8 | 6069 | && strcmp_iw (sym->search_name (), name) == 0) |
927aa2e7 JK |
6070 | return stab; |
6071 | if (with_opaque != NULL | |
987012b8 | 6072 | && strcmp_iw (with_opaque->search_name (), name) == 0) |
927aa2e7 | 6073 | stab_best = stab; |
9703b513 | 6074 | |
927aa2e7 | 6075 | /* Keep looking through other CUs. */ |
9703b513 TT |
6076 | } |
6077 | ||
927aa2e7 | 6078 | return stab_best; |
9703b513 TT |
6079 | } |
6080 | ||
927aa2e7 JK |
6081 | /* This dumps minimal information about .debug_names. It is called |
6082 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
6083 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 6084 | |
927aa2e7 JK |
6085 | static void |
6086 | dw2_debug_names_dump (struct objfile *objfile) | |
6087 | { | |
ed2dc618 SM |
6088 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6089 | = get_dwarf2_per_objfile (objfile); | |
6090 | ||
927aa2e7 JK |
6091 | gdb_assert (dwarf2_per_objfile->using_index); |
6092 | printf_filtered (".debug_names:"); | |
6093 | if (dwarf2_per_objfile->debug_names_table) | |
6094 | printf_filtered (" exists\n"); | |
6095 | else | |
6096 | printf_filtered (" faked for \"readnow\"\n"); | |
6097 | printf_filtered ("\n"); | |
9291a0cd TT |
6098 | } |
6099 | ||
9291a0cd | 6100 | static void |
927aa2e7 JK |
6101 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
6102 | const char *func_name) | |
9291a0cd | 6103 | { |
ed2dc618 SM |
6104 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6105 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 6106 | |
927aa2e7 JK |
6107 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
6108 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 6109 | { |
927aa2e7 | 6110 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 6111 | |
2b79f376 | 6112 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 6113 | |
927aa2e7 JK |
6114 | struct dwarf2_per_cu_data *per_cu; |
6115 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 6116 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
6117 | } |
6118 | } | |
24c79950 | 6119 | |
3b00ef10 TT |
6120 | static void |
6121 | dw2_debug_names_map_matching_symbols | |
6122 | (struct objfile *objfile, | |
6123 | const lookup_name_info &name, domain_enum domain, | |
6124 | int global, | |
6125 | gdb::function_view<symbol_found_callback_ftype> callback, | |
6126 | symbol_compare_ftype *ordered_compare) | |
6127 | { | |
6128 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
6129 | = get_dwarf2_per_objfile (objfile); | |
6130 | ||
6131 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
6132 | if (!dwarf2_per_objfile->debug_names_table) | |
6133 | return; | |
6134 | ||
6135 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; | |
6136 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
6137 | ||
6138 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
6139 | auto matcher = [&] (const char *symname) | |
6140 | { | |
6141 | if (ordered_compare == nullptr) | |
6142 | return true; | |
6143 | return ordered_compare (symname, match_name) == 0; | |
6144 | }; | |
6145 | ||
6146 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, | |
6147 | [&] (offset_type namei) | |
6148 | { | |
6149 | /* The name was matched, now expand corresponding CUs that were | |
6150 | marked. */ | |
6151 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); | |
6152 | ||
6153 | struct dwarf2_per_cu_data *per_cu; | |
6154 | while ((per_cu = iter.next ()) != NULL) | |
6155 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); | |
6156 | return true; | |
6157 | }); | |
6158 | ||
6159 | /* It's a shame we couldn't do this inside the | |
6160 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs | |
6161 | that have already been expanded. Instead, this loop matches what | |
6162 | the psymtab code does. */ | |
6163 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
6164 | { | |
6165 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; | |
6166 | if (cust != nullptr) | |
6167 | { | |
6168 | const struct block *block | |
6169 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
6170 | if (!iterate_over_symbols_terminated (block, name, | |
6171 | domain, callback)) | |
6172 | break; | |
6173 | } | |
6174 | } | |
6175 | } | |
6176 | ||
927aa2e7 JK |
6177 | static void |
6178 | dw2_debug_names_expand_symtabs_matching | |
6179 | (struct objfile *objfile, | |
6180 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
6181 | const lookup_name_info &lookup_name, | |
6182 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
6183 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
6184 | enum search_domain kind) | |
6185 | { | |
ed2dc618 SM |
6186 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6187 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 6188 | |
927aa2e7 JK |
6189 | /* debug_names_table is NULL if OBJF_READNOW. */ |
6190 | if (!dwarf2_per_objfile->debug_names_table) | |
6191 | return; | |
9291a0cd | 6192 | |
ed2dc618 | 6193 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 6194 | |
44ed8f3e | 6195 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 6196 | |
44ed8f3e PA |
6197 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
6198 | symbol_matcher, | |
6199 | kind, [&] (offset_type namei) | |
927aa2e7 | 6200 | { |
927aa2e7 JK |
6201 | /* The name was matched, now expand corresponding CUs that were |
6202 | marked. */ | |
6203 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 6204 | |
927aa2e7 JK |
6205 | struct dwarf2_per_cu_data *per_cu; |
6206 | while ((per_cu = iter.next ()) != NULL) | |
6207 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
6208 | expansion_notify); | |
3b00ef10 | 6209 | return true; |
44ed8f3e | 6210 | }); |
9291a0cd TT |
6211 | } |
6212 | ||
927aa2e7 | 6213 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
6214 | { |
6215 | dw2_has_symbols, | |
6216 | dw2_find_last_source_symtab, | |
6217 | dw2_forget_cached_source_info, | |
f8eba3c6 | 6218 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 6219 | dw2_debug_names_lookup_symbol, |
9291a0cd | 6220 | dw2_print_stats, |
927aa2e7 | 6221 | dw2_debug_names_dump, |
927aa2e7 | 6222 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 6223 | dw2_expand_all_symtabs, |
652a8996 | 6224 | dw2_expand_symtabs_with_fullname, |
3b00ef10 | 6225 | dw2_debug_names_map_matching_symbols, |
927aa2e7 | 6226 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 6227 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 6228 | NULL, |
9291a0cd TT |
6229 | dw2_map_symbol_filenames |
6230 | }; | |
6231 | ||
4485a1c1 SM |
6232 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
6233 | to either a dwarf2_per_objfile or dwz_file object. */ | |
6234 | ||
6235 | template <typename T> | |
6236 | static gdb::array_view<const gdb_byte> | |
6237 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
6238 | { | |
6239 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
6240 | ||
6241 | if (dwarf2_section_empty_p (section)) | |
6242 | return {}; | |
6243 | ||
6244 | /* Older elfutils strip versions could keep the section in the main | |
6245 | executable while splitting it for the separate debug info file. */ | |
6246 | if ((get_section_flags (section) & SEC_HAS_CONTENTS) == 0) | |
6247 | return {}; | |
6248 | ||
6249 | dwarf2_read_section (obj, section); | |
6250 | ||
8bebfcda PA |
6251 | /* dwarf2_section_info::size is a bfd_size_type, while |
6252 | gdb::array_view works with size_t. On 32-bit hosts, with | |
6253 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
6254 | is 32-bit. So we need an explicit narrowing conversion here. | |
6255 | This is fine, because it's impossible to allocate or mmap an | |
6256 | array/buffer larger than what size_t can represent. */ | |
6257 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
6258 | } |
6259 | ||
87d6a7aa SM |
6260 | /* Lookup the index cache for the contents of the index associated to |
6261 | DWARF2_OBJ. */ | |
6262 | ||
6263 | static gdb::array_view<const gdb_byte> | |
6264 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
6265 | { | |
6266 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
6267 | if (build_id == nullptr) | |
6268 | return {}; | |
6269 | ||
6270 | return global_index_cache.lookup_gdb_index (build_id, | |
6271 | &dwarf2_obj->index_cache_res); | |
6272 | } | |
6273 | ||
6274 | /* Same as the above, but for DWZ. */ | |
6275 | ||
6276 | static gdb::array_view<const gdb_byte> | |
6277 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
6278 | { | |
6279 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
6280 | if (build_id == nullptr) | |
6281 | return {}; | |
6282 | ||
6283 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
6284 | } | |
6285 | ||
3c0aa29a | 6286 | /* See symfile.h. */ |
9291a0cd | 6287 | |
3c0aa29a PA |
6288 | bool |
6289 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 6290 | { |
ed2dc618 SM |
6291 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6292 | = get_dwarf2_per_objfile (objfile); | |
6293 | ||
9291a0cd TT |
6294 | /* If we're about to read full symbols, don't bother with the |
6295 | indices. In this case we also don't care if some other debug | |
6296 | format is making psymtabs, because they are all about to be | |
6297 | expanded anyway. */ | |
6298 | if ((objfile->flags & OBJF_READNOW)) | |
6299 | { | |
9291a0cd | 6300 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
6301 | create_all_comp_units (dwarf2_per_objfile); |
6302 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
6303 | dwarf2_per_objfile->quick_file_names_table |
6304 | = create_quick_file_names_table | |
6305 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 6306 | |
b76e467d | 6307 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 6308 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 6309 | { |
ff4c9fec | 6310 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 6311 | |
e254ef6a DE |
6312 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6313 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
6314 | } |
6315 | ||
6316 | /* Return 1 so that gdb sees the "quick" functions. However, | |
6317 | these functions will be no-ops because we will have expanded | |
6318 | all symtabs. */ | |
3c0aa29a PA |
6319 | *index_kind = dw_index_kind::GDB_INDEX; |
6320 | return true; | |
9291a0cd TT |
6321 | } |
6322 | ||
ed2dc618 | 6323 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
6324 | { |
6325 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
6326 | return true; | |
6327 | } | |
927aa2e7 | 6328 | |
4485a1c1 SM |
6329 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
6330 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
6331 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
6332 | { |
6333 | *index_kind = dw_index_kind::GDB_INDEX; | |
6334 | return true; | |
6335 | } | |
9291a0cd | 6336 | |
87d6a7aa SM |
6337 | /* ... otherwise, try to find the index in the index cache. */ |
6338 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
6339 | get_gdb_index_contents_from_cache, | |
6340 | get_gdb_index_contents_from_cache_dwz)) | |
6341 | { | |
6342 | global_index_cache.hit (); | |
6343 | *index_kind = dw_index_kind::GDB_INDEX; | |
6344 | return true; | |
6345 | } | |
6346 | ||
6347 | global_index_cache.miss (); | |
3c0aa29a | 6348 | return false; |
9291a0cd TT |
6349 | } |
6350 | ||
6351 | \f | |
6352 | ||
dce234bc PP |
6353 | /* Build a partial symbol table. */ |
6354 | ||
6355 | void | |
f29dff0a | 6356 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 6357 | { |
ed2dc618 SM |
6358 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6359 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 6360 | |
6eee24ce | 6361 | init_psymbol_list (objfile, 1024); |
c906108c | 6362 | |
a70b8144 | 6363 | try |
c9bf0622 TT |
6364 | { |
6365 | /* This isn't really ideal: all the data we allocate on the | |
6366 | objfile's obstack is still uselessly kept around. However, | |
6367 | freeing it seems unsafe. */ | |
906768f9 | 6368 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 6369 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 6370 | psymtabs.keep (); |
87d6a7aa SM |
6371 | |
6372 | /* (maybe) store an index in the cache. */ | |
6373 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 6374 | } |
230d2906 | 6375 | catch (const gdb_exception_error &except) |
492d29ea PA |
6376 | { |
6377 | exception_print (gdb_stderr, except); | |
6378 | } | |
c906108c | 6379 | } |
c906108c | 6380 | |
1ce1cefd DE |
6381 | /* Return the total length of the CU described by HEADER. */ |
6382 | ||
6383 | static unsigned int | |
6384 | get_cu_length (const struct comp_unit_head *header) | |
6385 | { | |
6386 | return header->initial_length_size + header->length; | |
6387 | } | |
6388 | ||
9c541725 | 6389 | /* Return TRUE if SECT_OFF is within CU_HEADER. */ |
45452591 | 6390 | |
9c541725 PA |
6391 | static inline bool |
6392 | offset_in_cu_p (const comp_unit_head *cu_header, sect_offset sect_off) | |
45452591 | 6393 | { |
9c541725 PA |
6394 | sect_offset bottom = cu_header->sect_off; |
6395 | sect_offset top = cu_header->sect_off + get_cu_length (cu_header); | |
9a619af0 | 6396 | |
9c541725 | 6397 | return sect_off >= bottom && sect_off < top; |
45452591 DE |
6398 | } |
6399 | ||
3b80fe9b DE |
6400 | /* Find the base address of the compilation unit for range lists and |
6401 | location lists. It will normally be specified by DW_AT_low_pc. | |
6402 | In DWARF-3 draft 4, the base address could be overridden by | |
6403 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
6404 | compilation units with discontinuous ranges. */ | |
6405 | ||
6406 | static void | |
6407 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
6408 | { | |
6409 | struct attribute *attr; | |
6410 | ||
6411 | cu->base_known = 0; | |
6412 | cu->base_address = 0; | |
6413 | ||
6414 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 6415 | if (attr != nullptr) |
3b80fe9b | 6416 | { |
31aa7e4e | 6417 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6418 | cu->base_known = 1; |
6419 | } | |
6420 | else | |
6421 | { | |
6422 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 6423 | if (attr != nullptr) |
3b80fe9b | 6424 | { |
31aa7e4e | 6425 | cu->base_address = attr_value_as_address (attr); |
3b80fe9b DE |
6426 | cu->base_known = 1; |
6427 | } | |
6428 | } | |
6429 | } | |
6430 | ||
93311388 | 6431 | /* Read in the comp unit header information from the debug_info at info_ptr. |
43988095 | 6432 | Use rcuh_kind::COMPILE as the default type if not known by the caller. |
93311388 DE |
6433 | NOTE: This leaves members offset, first_die_offset to be filled in |
6434 | by the caller. */ | |
107d2387 | 6435 | |
d521ce57 | 6436 | static const gdb_byte * |
107d2387 | 6437 | read_comp_unit_head (struct comp_unit_head *cu_header, |
43988095 JK |
6438 | const gdb_byte *info_ptr, |
6439 | struct dwarf2_section_info *section, | |
6440 | rcuh_kind section_kind) | |
107d2387 AC |
6441 | { |
6442 | int signed_addr; | |
891d2f0b | 6443 | unsigned int bytes_read; |
43988095 JK |
6444 | const char *filename = get_section_file_name (section); |
6445 | bfd *abfd = get_section_bfd_owner (section); | |
c764a876 DE |
6446 | |
6447 | cu_header->length = read_initial_length (abfd, info_ptr, &bytes_read); | |
6448 | cu_header->initial_length_size = bytes_read; | |
6449 | cu_header->offset_size = (bytes_read == 4) ? 4 : 8; | |
613e1657 | 6450 | info_ptr += bytes_read; |
107d2387 | 6451 | cu_header->version = read_2_bytes (abfd, info_ptr); |
1ea5da02 TV |
6452 | if (cu_header->version < 2 || cu_header->version > 5) |
6453 | error (_("Dwarf Error: wrong version in compilation unit header " | |
6454 | "(is %d, should be 2, 3, 4 or 5) [in module %s]"), | |
6455 | cu_header->version, filename); | |
107d2387 | 6456 | info_ptr += 2; |
43988095 JK |
6457 | if (cu_header->version < 5) |
6458 | switch (section_kind) | |
6459 | { | |
6460 | case rcuh_kind::COMPILE: | |
6461 | cu_header->unit_type = DW_UT_compile; | |
6462 | break; | |
6463 | case rcuh_kind::TYPE: | |
6464 | cu_header->unit_type = DW_UT_type; | |
6465 | break; | |
6466 | default: | |
6467 | internal_error (__FILE__, __LINE__, | |
6468 | _("read_comp_unit_head: invalid section_kind")); | |
6469 | } | |
6470 | else | |
6471 | { | |
6472 | cu_header->unit_type = static_cast<enum dwarf_unit_type> | |
6473 | (read_1_byte (abfd, info_ptr)); | |
6474 | info_ptr += 1; | |
6475 | switch (cu_header->unit_type) | |
6476 | { | |
6477 | case DW_UT_compile: | |
a084a2a6 AT |
6478 | case DW_UT_partial: |
6479 | case DW_UT_skeleton: | |
6480 | case DW_UT_split_compile: | |
43988095 JK |
6481 | if (section_kind != rcuh_kind::COMPILE) |
6482 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
a084a2a6 AT |
6483 | "(is %s, should be %s) [in module %s]"), |
6484 | dwarf_unit_type_name (cu_header->unit_type), | |
6485 | dwarf_unit_type_name (DW_UT_type), filename); | |
43988095 JK |
6486 | break; |
6487 | case DW_UT_type: | |
a084a2a6 | 6488 | case DW_UT_split_type: |
43988095 JK |
6489 | section_kind = rcuh_kind::TYPE; |
6490 | break; | |
6491 | default: | |
6492 | error (_("Dwarf Error: wrong unit_type in compilation unit header " | |
a084a2a6 AT |
6493 | "(is %#04x, should be one of: %s, %s, %s, %s or %s) " |
6494 | "[in module %s]"), cu_header->unit_type, | |
6495 | dwarf_unit_type_name (DW_UT_compile), | |
6496 | dwarf_unit_type_name (DW_UT_skeleton), | |
6497 | dwarf_unit_type_name (DW_UT_split_compile), | |
6498 | dwarf_unit_type_name (DW_UT_type), | |
6499 | dwarf_unit_type_name (DW_UT_split_type), filename); | |
43988095 JK |
6500 | } |
6501 | ||
6502 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6503 | info_ptr += 1; | |
6504 | } | |
9c541725 PA |
6505 | cu_header->abbrev_sect_off = (sect_offset) read_offset (abfd, info_ptr, |
6506 | cu_header, | |
6507 | &bytes_read); | |
613e1657 | 6508 | info_ptr += bytes_read; |
43988095 JK |
6509 | if (cu_header->version < 5) |
6510 | { | |
6511 | cu_header->addr_size = read_1_byte (abfd, info_ptr); | |
6512 | info_ptr += 1; | |
6513 | } | |
107d2387 AC |
6514 | signed_addr = bfd_get_sign_extend_vma (abfd); |
6515 | if (signed_addr < 0) | |
8e65ff28 | 6516 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 6517 | _("read_comp_unit_head: dwarf from non elf file")); |
107d2387 | 6518 | cu_header->signed_addr_p = signed_addr; |
c764a876 | 6519 | |
a084a2a6 AT |
6520 | bool header_has_signature = section_kind == rcuh_kind::TYPE |
6521 | || cu_header->unit_type == DW_UT_skeleton | |
6522 | || cu_header->unit_type == DW_UT_split_compile; | |
43988095 | 6523 | |
a084a2a6 AT |
6524 | if (header_has_signature) |
6525 | { | |
43988095 JK |
6526 | cu_header->signature = read_8_bytes (abfd, info_ptr); |
6527 | info_ptr += 8; | |
a084a2a6 | 6528 | } |
43988095 | 6529 | |
a084a2a6 AT |
6530 | if (section_kind == rcuh_kind::TYPE) |
6531 | { | |
6532 | LONGEST type_offset; | |
43988095 JK |
6533 | type_offset = read_offset (abfd, info_ptr, cu_header, &bytes_read); |
6534 | info_ptr += bytes_read; | |
9c541725 PA |
6535 | cu_header->type_cu_offset_in_tu = (cu_offset) type_offset; |
6536 | if (to_underlying (cu_header->type_cu_offset_in_tu) != type_offset) | |
43988095 JK |
6537 | error (_("Dwarf Error: Too big type_offset in compilation unit " |
6538 | "header (is %s) [in module %s]"), plongest (type_offset), | |
6539 | filename); | |
6540 | } | |
6541 | ||
107d2387 AC |
6542 | return info_ptr; |
6543 | } | |
6544 | ||
36586728 TT |
6545 | /* Helper function that returns the proper abbrev section for |
6546 | THIS_CU. */ | |
6547 | ||
6548 | static struct dwarf2_section_info * | |
6549 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
6550 | { | |
6551 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 6552 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
6553 | |
6554 | if (this_cu->is_dwz) | |
ed2dc618 | 6555 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
6556 | else |
6557 | abbrev = &dwarf2_per_objfile->abbrev; | |
6558 | ||
6559 | return abbrev; | |
6560 | } | |
6561 | ||
9ff913ba DE |
6562 | /* Subroutine of read_and_check_comp_unit_head and |
6563 | read_and_check_type_unit_head to simplify them. | |
6564 | Perform various error checking on the header. */ | |
6565 | ||
6566 | static void | |
ed2dc618 SM |
6567 | error_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6568 | struct comp_unit_head *header, | |
4bdcc0c1 DE |
6569 | struct dwarf2_section_info *section, |
6570 | struct dwarf2_section_info *abbrev_section) | |
9ff913ba | 6571 | { |
a32a8923 | 6572 | const char *filename = get_section_file_name (section); |
9ff913ba | 6573 | |
9c541725 | 6574 | if (to_underlying (header->abbrev_sect_off) |
36586728 | 6575 | >= dwarf2_section_size (dwarf2_per_objfile->objfile, abbrev_section)) |
9d8780f0 SM |
6576 | error (_("Dwarf Error: bad offset (%s) in compilation unit header " |
6577 | "(offset %s + 6) [in module %s]"), | |
6578 | sect_offset_str (header->abbrev_sect_off), | |
6579 | sect_offset_str (header->sect_off), | |
9ff913ba DE |
6580 | filename); |
6581 | ||
9c541725 | 6582 | /* Cast to ULONGEST to use 64-bit arithmetic when possible to |
9ff913ba | 6583 | avoid potential 32-bit overflow. */ |
9c541725 | 6584 | if (((ULONGEST) header->sect_off + get_cu_length (header)) |
9ff913ba | 6585 | > section->size) |
9c541725 | 6586 | error (_("Dwarf Error: bad length (0x%x) in compilation unit header " |
9d8780f0 SM |
6587 | "(offset %s + 0) [in module %s]"), |
6588 | header->length, sect_offset_str (header->sect_off), | |
9ff913ba DE |
6589 | filename); |
6590 | } | |
6591 | ||
6592 | /* Read in a CU/TU header and perform some basic error checking. | |
6593 | The contents of the header are stored in HEADER. | |
6594 | The result is a pointer to the start of the first DIE. */ | |
adabb602 | 6595 | |
d521ce57 | 6596 | static const gdb_byte * |
ed2dc618 SM |
6597 | read_and_check_comp_unit_head (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6598 | struct comp_unit_head *header, | |
9ff913ba | 6599 | struct dwarf2_section_info *section, |
4bdcc0c1 | 6600 | struct dwarf2_section_info *abbrev_section, |
d521ce57 | 6601 | const gdb_byte *info_ptr, |
43988095 | 6602 | rcuh_kind section_kind) |
72bf9492 | 6603 | { |
d521ce57 | 6604 | const gdb_byte *beg_of_comp_unit = info_ptr; |
72bf9492 | 6605 | |
9c541725 | 6606 | header->sect_off = (sect_offset) (beg_of_comp_unit - section->buffer); |
adabb602 | 6607 | |
43988095 | 6608 | info_ptr = read_comp_unit_head (header, info_ptr, section, section_kind); |
9ff913ba | 6609 | |
9c541725 | 6610 | header->first_die_cu_offset = (cu_offset) (info_ptr - beg_of_comp_unit); |
348e048f | 6611 | |
ed2dc618 SM |
6612 | error_check_comp_unit_head (dwarf2_per_objfile, header, section, |
6613 | abbrev_section); | |
9ff913ba DE |
6614 | |
6615 | return info_ptr; | |
348e048f DE |
6616 | } |
6617 | ||
f4dc4d17 DE |
6618 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
6619 | ||
6620 | static sect_offset | |
ed2dc618 SM |
6621 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6622 | struct dwarf2_section_info *section, | |
9c541725 | 6623 | sect_offset sect_off) |
f4dc4d17 | 6624 | { |
a32a8923 | 6625 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 6626 | const gdb_byte *info_ptr; |
ac298888 | 6627 | unsigned int initial_length_size, offset_size; |
43988095 | 6628 | uint16_t version; |
f4dc4d17 DE |
6629 | |
6630 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
9c541725 | 6631 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 6632 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 6633 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
6634 | info_ptr += initial_length_size; |
6635 | ||
6636 | version = read_2_bytes (abfd, info_ptr); | |
6637 | info_ptr += 2; | |
6638 | if (version >= 5) | |
6639 | { | |
6640 | /* Skip unit type and address size. */ | |
6641 | info_ptr += 2; | |
6642 | } | |
6643 | ||
9c541725 | 6644 | return (sect_offset) read_offset_1 (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
6645 | } |
6646 | ||
aaa75496 JB |
6647 | /* Allocate a new partial symtab for file named NAME and mark this new |
6648 | partial symtab as being an include of PST. */ | |
6649 | ||
6650 | static void | |
d521ce57 | 6651 | dwarf2_create_include_psymtab (const char *name, struct partial_symtab *pst, |
aaa75496 JB |
6652 | struct objfile *objfile) |
6653 | { | |
6654 | struct partial_symtab *subpst = allocate_psymtab (name, objfile); | |
6655 | ||
fbd9ab74 JK |
6656 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
6657 | { | |
6658 | /* It shares objfile->objfile_obstack. */ | |
6659 | subpst->dirname = pst->dirname; | |
6660 | } | |
6661 | ||
a9342b62 | 6662 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
6663 | subpst->dependencies[0] = pst; |
6664 | subpst->number_of_dependencies = 1; | |
6665 | ||
aaa75496 | 6666 | subpst->read_symtab = pst->read_symtab; |
aaa75496 JB |
6667 | |
6668 | /* No private part is necessary for include psymtabs. This property | |
6669 | can be used to differentiate between such include psymtabs and | |
10b3939b | 6670 | the regular ones. */ |
58a9656e | 6671 | subpst->read_symtab_private = NULL; |
aaa75496 JB |
6672 | } |
6673 | ||
6674 | /* Read the Line Number Program data and extract the list of files | |
6675 | included by the source file represented by PST. Build an include | |
d85a05f0 | 6676 | partial symtab for each of these included files. */ |
aaa75496 JB |
6677 | |
6678 | static void | |
6679 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 DE |
6680 | struct die_info *die, |
6681 | struct partial_symtab *pst) | |
aaa75496 | 6682 | { |
fff8551c | 6683 | line_header_up lh; |
d85a05f0 | 6684 | struct attribute *attr; |
aaa75496 | 6685 | |
d85a05f0 | 6686 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
435d3d88 | 6687 | if (attr != nullptr) |
9c541725 | 6688 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
6689 | if (lh == NULL) |
6690 | return; /* No linetable, so no includes. */ | |
6691 | ||
79748972 TT |
6692 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
6693 | that we pass in the raw text_low here; that is ok because we're | |
6694 | only decoding the line table to make include partial symtabs, and | |
6695 | so the addresses aren't really used. */ | |
4ae976d1 | 6696 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 6697 | pst->raw_text_low (), 1); |
aaa75496 JB |
6698 | } |
6699 | ||
348e048f | 6700 | static hashval_t |
52dc124a | 6701 | hash_signatured_type (const void *item) |
348e048f | 6702 | { |
9a3c8263 SM |
6703 | const struct signatured_type *sig_type |
6704 | = (const struct signatured_type *) item; | |
9a619af0 | 6705 | |
348e048f | 6706 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 6707 | return sig_type->signature; |
348e048f DE |
6708 | } |
6709 | ||
6710 | static int | |
52dc124a | 6711 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 6712 | { |
9a3c8263 SM |
6713 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
6714 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 6715 | |
348e048f DE |
6716 | return lhs->signature == rhs->signature; |
6717 | } | |
6718 | ||
1fd400ff TT |
6719 | /* Allocate a hash table for signatured types. */ |
6720 | ||
6721 | static htab_t | |
673bfd45 | 6722 | allocate_signatured_type_table (struct objfile *objfile) |
1fd400ff TT |
6723 | { |
6724 | return htab_create_alloc_ex (41, | |
52dc124a DE |
6725 | hash_signatured_type, |
6726 | eq_signatured_type, | |
1fd400ff TT |
6727 | NULL, |
6728 | &objfile->objfile_obstack, | |
6729 | hashtab_obstack_allocate, | |
6730 | dummy_obstack_deallocate); | |
6731 | } | |
6732 | ||
d467dd73 | 6733 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6734 | |
6735 | static int | |
d467dd73 | 6736 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6737 | { |
9a3c8263 | 6738 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6739 | std::vector<signatured_type *> *all_type_units |
6740 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6741 | |
b2bdb8cf | 6742 | all_type_units->push_back (sigt); |
1fd400ff TT |
6743 | |
6744 | return 1; | |
6745 | } | |
6746 | ||
78d4d2c5 | 6747 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6748 | and fill them into TYPES_HTAB. It will process only type units, |
6749 | therefore DW_UT_type. */ | |
c88ee1f0 | 6750 | |
78d4d2c5 | 6751 | static void |
ed2dc618 SM |
6752 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6753 | struct dwo_file *dwo_file, | |
43988095 JK |
6754 | dwarf2_section_info *section, htab_t &types_htab, |
6755 | rcuh_kind section_kind) | |
348e048f | 6756 | { |
3019eac3 | 6757 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6758 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6759 | bfd *abfd; |
6760 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6761 | |
4bdcc0c1 DE |
6762 | abbrev_section = (dwo_file != NULL |
6763 | ? &dwo_file->sections.abbrev | |
6764 | : &dwarf2_per_objfile->abbrev); | |
6765 | ||
b4f54984 | 6766 | if (dwarf_read_debug) |
43988095 JK |
6767 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
6768 | get_section_name (section), | |
a32a8923 | 6769 | get_section_file_name (abbrev_section)); |
09406207 | 6770 | |
78d4d2c5 JK |
6771 | dwarf2_read_section (objfile, section); |
6772 | info_ptr = section->buffer; | |
348e048f | 6773 | |
78d4d2c5 JK |
6774 | if (info_ptr == NULL) |
6775 | return; | |
348e048f | 6776 | |
78d4d2c5 JK |
6777 | /* We can't set abfd until now because the section may be empty or |
6778 | not present, in which case the bfd is unknown. */ | |
6779 | abfd = get_section_bfd_owner (section); | |
348e048f | 6780 | |
78d4d2c5 JK |
6781 | /* We don't use init_cutu_and_read_dies_simple, or some such, here |
6782 | because we don't need to read any dies: the signature is in the | |
6783 | header. */ | |
3019eac3 | 6784 | |
78d4d2c5 JK |
6785 | end_ptr = info_ptr + section->size; |
6786 | while (info_ptr < end_ptr) | |
6787 | { | |
78d4d2c5 JK |
6788 | struct signatured_type *sig_type; |
6789 | struct dwo_unit *dwo_tu; | |
6790 | void **slot; | |
6791 | const gdb_byte *ptr = info_ptr; | |
6792 | struct comp_unit_head header; | |
6793 | unsigned int length; | |
8b70b953 | 6794 | |
9c541725 | 6795 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6796 | |
a49dd8dd JK |
6797 | /* Initialize it due to a false compiler warning. */ |
6798 | header.signature = -1; | |
9c541725 | 6799 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6800 | |
78d4d2c5 JK |
6801 | /* We need to read the type's signature in order to build the hash |
6802 | table, but we don't need anything else just yet. */ | |
348e048f | 6803 | |
ed2dc618 | 6804 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6805 | abbrev_section, ptr, section_kind); |
348e048f | 6806 | |
78d4d2c5 | 6807 | length = get_cu_length (&header); |
6caca83c | 6808 | |
78d4d2c5 JK |
6809 | /* Skip dummy type units. */ |
6810 | if (ptr >= info_ptr + length | |
43988095 JK |
6811 | || peek_abbrev_code (abfd, ptr) == 0 |
6812 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6813 | { |
6814 | info_ptr += length; | |
6815 | continue; | |
6816 | } | |
dee91e82 | 6817 | |
78d4d2c5 JK |
6818 | if (types_htab == NULL) |
6819 | { | |
6820 | if (dwo_file) | |
6821 | types_htab = allocate_dwo_unit_table (objfile); | |
6822 | else | |
6823 | types_htab = allocate_signatured_type_table (objfile); | |
6824 | } | |
8b70b953 | 6825 | |
78d4d2c5 JK |
6826 | if (dwo_file) |
6827 | { | |
6828 | sig_type = NULL; | |
6829 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6830 | struct dwo_unit); | |
6831 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6832 | dwo_tu->signature = header.signature; |
9c541725 | 6833 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6834 | dwo_tu->section = section; |
9c541725 | 6835 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6836 | dwo_tu->length = length; |
6837 | } | |
6838 | else | |
6839 | { | |
6840 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6841 | The real type_offset is in the DWO file. */ | |
6842 | dwo_tu = NULL; | |
6843 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6844 | struct signatured_type); | |
43988095 | 6845 | sig_type->signature = header.signature; |
9c541725 | 6846 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6847 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6848 | sig_type->per_cu.is_debug_types = 1; |
6849 | sig_type->per_cu.section = section; | |
9c541725 | 6850 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6851 | sig_type->per_cu.length = length; |
6852 | } | |
6853 | ||
6854 | slot = htab_find_slot (types_htab, | |
6855 | dwo_file ? (void*) dwo_tu : (void *) sig_type, | |
6856 | INSERT); | |
6857 | gdb_assert (slot != NULL); | |
6858 | if (*slot != NULL) | |
6859 | { | |
9c541725 | 6860 | sect_offset dup_sect_off; |
0349ea22 | 6861 | |
3019eac3 DE |
6862 | if (dwo_file) |
6863 | { | |
78d4d2c5 JK |
6864 | const struct dwo_unit *dup_tu |
6865 | = (const struct dwo_unit *) *slot; | |
6866 | ||
9c541725 | 6867 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6868 | } |
6869 | else | |
6870 | { | |
78d4d2c5 JK |
6871 | const struct signatured_type *dup_tu |
6872 | = (const struct signatured_type *) *slot; | |
6873 | ||
9c541725 | 6874 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6875 | } |
8b70b953 | 6876 | |
b98664d3 | 6877 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6878 | " the entry at offset %s, signature %s"), |
6879 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6880 | hex_string (header.signature)); |
78d4d2c5 JK |
6881 | } |
6882 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6883 | |
78d4d2c5 | 6884 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6885 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6886 | sect_offset_str (sect_off), | |
43988095 | 6887 | hex_string (header.signature)); |
3019eac3 | 6888 | |
78d4d2c5 JK |
6889 | info_ptr += length; |
6890 | } | |
6891 | } | |
3019eac3 | 6892 | |
78d4d2c5 JK |
6893 | /* Create the hash table of all entries in the .debug_types |
6894 | (or .debug_types.dwo) section(s). | |
6895 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6896 | otherwise it is NULL. | |
b3c8eb43 | 6897 | |
78d4d2c5 | 6898 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6899 | |
78d4d2c5 | 6900 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6901 | |
78d4d2c5 | 6902 | static void |
ed2dc618 SM |
6903 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6904 | struct dwo_file *dwo_file, | |
fd5866f6 | 6905 | gdb::array_view<dwarf2_section_info> type_sections, |
78d4d2c5 JK |
6906 | htab_t &types_htab) |
6907 | { | |
fd5866f6 SM |
6908 | for (dwarf2_section_info §ion : type_sections) |
6909 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6910 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6911 | } |
6912 | ||
6913 | /* Create the hash table of all entries in the .debug_types section, | |
6914 | and initialize all_type_units. | |
6915 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6916 | otherwise non-zero. */ | |
6917 | ||
6918 | static int | |
ed2dc618 | 6919 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6920 | { |
78d4d2c5 | 6921 | htab_t types_htab = NULL; |
3019eac3 | 6922 | |
ed2dc618 SM |
6923 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6924 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6925 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6926 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6927 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6928 | if (types_htab == NULL) |
6929 | { | |
6930 | dwarf2_per_objfile->signatured_types = NULL; | |
6931 | return 0; | |
6932 | } | |
6933 | ||
348e048f DE |
6934 | dwarf2_per_objfile->signatured_types = types_htab; |
6935 | ||
b2bdb8cf SM |
6936 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
6937 | dwarf2_per_objfile->all_type_units.reserve (htab_elements (types_htab)); | |
6938 | ||
6939 | htab_traverse_noresize (types_htab, add_signatured_type_cu_to_table, | |
6940 | &dwarf2_per_objfile->all_type_units); | |
1fd400ff | 6941 | |
348e048f DE |
6942 | return 1; |
6943 | } | |
6944 | ||
6aa5f3a6 DE |
6945 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6946 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6947 | Otherwise we find one. */ | |
6948 | ||
6949 | static struct signatured_type * | |
ed2dc618 SM |
6950 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6951 | void **slot) | |
6aa5f3a6 DE |
6952 | { |
6953 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6954 | |
b2bdb8cf SM |
6955 | if (dwarf2_per_objfile->all_type_units.size () |
6956 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6957 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6958 | |
b2bdb8cf SM |
6959 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6960 | struct signatured_type); | |
6961 | ||
6962 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6963 | sig_type->signature = sig; |
6964 | sig_type->per_cu.is_debug_types = 1; | |
6965 | if (dwarf2_per_objfile->using_index) | |
6966 | { | |
6967 | sig_type->per_cu.v.quick = | |
6968 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6969 | struct dwarf2_per_cu_quick_data); | |
6970 | } | |
6971 | ||
6972 | if (slot == NULL) | |
6973 | { | |
6974 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
6975 | sig_type, INSERT); | |
6976 | } | |
6977 | gdb_assert (*slot == NULL); | |
6978 | *slot = sig_type; | |
6979 | /* The rest of sig_type must be filled in by the caller. */ | |
6980 | return sig_type; | |
6981 | } | |
6982 | ||
a2ce51a0 DE |
6983 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6984 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6985 | ||
6986 | static void | |
ed2dc618 | 6987 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6988 | struct signatured_type *sig_entry, |
6989 | struct dwo_unit *dwo_entry) | |
6990 | { | |
7ee85ab1 | 6991 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6992 | gdb_assert (! sig_entry->per_cu.queued); |
6993 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6994 | if (dwarf2_per_objfile->using_index) |
6995 | { | |
6996 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6997 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6998 | } |
6999 | else | |
7000 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 7001 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 7002 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 7003 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
7004 | gdb_assert (sig_entry->dwo_unit == NULL); |
7005 | ||
7006 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 7007 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
7008 | sig_entry->per_cu.length = dwo_entry->length; |
7009 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 7010 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
7011 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
7012 | sig_entry->dwo_unit = dwo_entry; | |
7013 | } | |
7014 | ||
7015 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
7016 | If we haven't read the TU yet, create the signatured_type data structure |
7017 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
7018 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
7019 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
7020 | containing that CU. Otherwise we could end up reading several other DWO | |
7021 | files (due to comdat folding) to process the transitive closure of all the | |
7022 | mentioned TUs, and that can be slow. The current DWO file will have every | |
7023 | type signature that it needs. | |
a2ce51a0 DE |
7024 | We only do this for .gdb_index because in the psymtab case we already have |
7025 | to read all the DWOs to build the type unit groups. */ | |
7026 | ||
7027 | static struct signatured_type * | |
7028 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
7029 | { | |
518817b3 SM |
7030 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7031 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
7032 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7033 | struct dwo_file *dwo_file; | |
7034 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
7035 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7036 | void **slot; |
a2ce51a0 DE |
7037 | |
7038 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7039 | ||
6aa5f3a6 DE |
7040 | /* If TU skeletons have been removed then we may not have read in any |
7041 | TUs yet. */ | |
7042 | if (dwarf2_per_objfile->signatured_types == NULL) | |
7043 | { | |
7044 | dwarf2_per_objfile->signatured_types | |
7045 | = allocate_signatured_type_table (objfile); | |
7046 | } | |
a2ce51a0 DE |
7047 | |
7048 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
7049 | Use the global signatured_types array to do our own comdat-folding |
7050 | of types. If this is the first time we're reading this TU, and | |
7051 | the TU has an entry in .gdb_index, replace the recorded data from | |
7052 | .gdb_index with this TU. */ | |
a2ce51a0 | 7053 | |
a2ce51a0 | 7054 | find_sig_entry.signature = sig; |
6aa5f3a6 DE |
7055 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, |
7056 | &find_sig_entry, INSERT); | |
9a3c8263 | 7057 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
7058 | |
7059 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
7060 | read. Don't reassign the global entry to point to this DWO if that's |
7061 | the case. Also note that if the TU is already being read, it may not | |
7062 | have come from a DWO, the program may be a mix of Fission-compiled | |
7063 | code and non-Fission-compiled code. */ | |
7064 | ||
7065 | /* Have we already tried to read this TU? | |
7066 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7067 | needn't exist in the global table yet). */ | |
7068 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
7069 | return sig_entry; |
7070 | ||
6aa5f3a6 DE |
7071 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
7072 | dwo_unit of the TU itself. */ | |
7073 | dwo_file = cu->dwo_unit->dwo_file; | |
7074 | ||
a2ce51a0 DE |
7075 | /* Ok, this is the first time we're reading this TU. */ |
7076 | if (dwo_file->tus == NULL) | |
7077 | return NULL; | |
7078 | find_dwo_entry.signature = sig; | |
9a3c8263 | 7079 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_entry); |
a2ce51a0 DE |
7080 | if (dwo_entry == NULL) |
7081 | return NULL; | |
7082 | ||
6aa5f3a6 DE |
7083 | /* If the global table doesn't have an entry for this TU, add one. */ |
7084 | if (sig_entry == NULL) | |
ed2dc618 | 7085 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 7086 | |
ed2dc618 | 7087 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 7088 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
7089 | return sig_entry; |
7090 | } | |
7091 | ||
a2ce51a0 DE |
7092 | /* Subroutine of lookup_signatured_type. |
7093 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
7094 | then try the DWP file. If the TU stub (skeleton) has been removed then |
7095 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
7096 | |
7097 | static struct signatured_type * | |
7098 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
7099 | { | |
518817b3 SM |
7100 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7101 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 | 7102 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ed2dc618 | 7103 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
7104 | struct dwo_unit *dwo_entry; |
7105 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 7106 | void **slot; |
a2ce51a0 DE |
7107 | |
7108 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
7109 | gdb_assert (dwp_file != NULL); | |
7110 | ||
6aa5f3a6 DE |
7111 | /* If TU skeletons have been removed then we may not have read in any |
7112 | TUs yet. */ | |
7113 | if (dwarf2_per_objfile->signatured_types == NULL) | |
a2ce51a0 | 7114 | { |
6aa5f3a6 DE |
7115 | dwarf2_per_objfile->signatured_types |
7116 | = allocate_signatured_type_table (objfile); | |
a2ce51a0 DE |
7117 | } |
7118 | ||
6aa5f3a6 DE |
7119 | find_sig_entry.signature = sig; |
7120 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, | |
7121 | &find_sig_entry, INSERT); | |
9a3c8263 | 7122 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
7123 | |
7124 | /* Have we already tried to read this TU? | |
7125 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
7126 | needn't exist in the global table yet). */ | |
7127 | if (sig_entry != NULL) | |
7128 | return sig_entry; | |
7129 | ||
a2ce51a0 DE |
7130 | if (dwp_file->tus == NULL) |
7131 | return NULL; | |
ed2dc618 | 7132 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 7133 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
7134 | if (dwo_entry == NULL) |
7135 | return NULL; | |
7136 | ||
ed2dc618 SM |
7137 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
7138 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 7139 | |
a2ce51a0 DE |
7140 | return sig_entry; |
7141 | } | |
7142 | ||
380bca97 | 7143 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
7144 | Returns NULL if signature SIG is not present in the table. |
7145 | It is up to the caller to complain about this. */ | |
348e048f DE |
7146 | |
7147 | static struct signatured_type * | |
a2ce51a0 | 7148 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 7149 | { |
518817b3 SM |
7150 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7151 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 7152 | |
a2ce51a0 DE |
7153 | if (cu->dwo_unit |
7154 | && dwarf2_per_objfile->using_index) | |
7155 | { | |
7156 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
7157 | These cases require special processing. */ | |
ed2dc618 | 7158 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
7159 | return lookup_dwo_signatured_type (cu, sig); |
7160 | else | |
7161 | return lookup_dwp_signatured_type (cu, sig); | |
7162 | } | |
7163 | else | |
7164 | { | |
7165 | struct signatured_type find_entry, *entry; | |
348e048f | 7166 | |
a2ce51a0 DE |
7167 | if (dwarf2_per_objfile->signatured_types == NULL) |
7168 | return NULL; | |
7169 | find_entry.signature = sig; | |
9a3c8263 SM |
7170 | entry = ((struct signatured_type *) |
7171 | htab_find (dwarf2_per_objfile->signatured_types, &find_entry)); | |
a2ce51a0 DE |
7172 | return entry; |
7173 | } | |
348e048f | 7174 | } |
42e7ad6c DE |
7175 | \f |
7176 | /* Low level DIE reading support. */ | |
348e048f | 7177 | |
d85a05f0 DJ |
7178 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
7179 | ||
7180 | static void | |
7181 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 7182 | struct dwarf2_cu *cu, |
3019eac3 | 7183 | struct dwarf2_section_info *section, |
685af9cd TT |
7184 | struct dwo_file *dwo_file, |
7185 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 7186 | { |
fceca515 | 7187 | gdb_assert (section->readin && section->buffer != NULL); |
a32a8923 | 7188 | reader->abfd = get_section_bfd_owner (section); |
d85a05f0 | 7189 | reader->cu = cu; |
3019eac3 | 7190 | reader->dwo_file = dwo_file; |
dee91e82 DE |
7191 | reader->die_section = section; |
7192 | reader->buffer = section->buffer; | |
f664829e | 7193 | reader->buffer_end = section->buffer + section->size; |
a2ce51a0 | 7194 | reader->comp_dir = NULL; |
685af9cd | 7195 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
7196 | } |
7197 | ||
b0c7bfa9 DE |
7198 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7199 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. | |
7200 | There's just a lot of work to do, and init_cutu_and_read_dies is big enough | |
7201 | already. | |
7202 | ||
7203 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
7204 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
7205 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
7206 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
7207 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
7208 | STUB_COMP_DIR may be non-NULL. | |
b0c7bfa9 DE |
7209 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN |
7210 | are filled in with the info of the DIE from the DWO file. | |
685af9cd TT |
7211 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
7212 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
7213 | kept around for at least as long as *RESULT_READER. | |
7214 | ||
b0c7bfa9 DE |
7215 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
7216 | ||
7217 | static int | |
7218 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
7219 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 7220 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 7221 | const char *stub_comp_dir, |
b0c7bfa9 | 7222 | struct die_reader_specs *result_reader, |
d521ce57 | 7223 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 7224 | struct die_info **result_comp_unit_die, |
685af9cd TT |
7225 | int *result_has_children, |
7226 | abbrev_table_up *result_dwo_abbrev_table) | |
b0c7bfa9 | 7227 | { |
ed2dc618 | 7228 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
7229 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7230 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 7231 | bfd *abfd; |
d521ce57 | 7232 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
7233 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
7234 | int i,num_extra_attrs; | |
7235 | struct dwarf2_section_info *dwo_abbrev_section; | |
7236 | struct attribute *attr; | |
7237 | struct die_info *comp_unit_die; | |
7238 | ||
b0aeadb3 DE |
7239 | /* At most one of these may be provided. */ |
7240 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 7241 | |
b0c7bfa9 DE |
7242 | /* These attributes aren't processed until later: |
7243 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
7244 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
7245 | referenced later. However, these attributes are found in the stub | |
7246 | which we won't have later. In order to not impose this complication | |
7247 | on the rest of the code, we read them here and copy them to the | |
7248 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
7249 | |
7250 | stmt_list = NULL; | |
7251 | low_pc = NULL; | |
7252 | high_pc = NULL; | |
7253 | ranges = NULL; | |
7254 | comp_dir = NULL; | |
7255 | ||
7256 | if (stub_comp_unit_die != NULL) | |
7257 | { | |
7258 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
7259 | DWO file. */ | |
7260 | if (! this_cu->is_debug_types) | |
7261 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
7262 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
7263 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
7264 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
7265 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
7266 | ||
7267 | /* There should be a DW_AT_addr_base attribute here (if needed). | |
336d760d AT |
7268 | We need the value before we can process DW_FORM_GNU_addr_index |
7269 | or DW_FORM_addrx. */ | |
b0c7bfa9 DE |
7270 | cu->addr_base = 0; |
7271 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_addr_base, cu); | |
435d3d88 | 7272 | if (attr != nullptr) |
b0c7bfa9 DE |
7273 | cu->addr_base = DW_UNSND (attr); |
7274 | ||
7275 | /* There should be a DW_AT_ranges_base attribute here (if needed). | |
7276 | We need the value before we can process DW_AT_ranges. */ | |
7277 | cu->ranges_base = 0; | |
7278 | attr = dwarf2_attr (stub_comp_unit_die, DW_AT_GNU_ranges_base, cu); | |
435d3d88 | 7279 | if (attr != nullptr) |
b0c7bfa9 DE |
7280 | cu->ranges_base = DW_UNSND (attr); |
7281 | } | |
a2ce51a0 DE |
7282 | else if (stub_comp_dir != NULL) |
7283 | { | |
7284 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 7285 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
7286 | comp_dir->name = DW_AT_comp_dir; |
7287 | comp_dir->form = DW_FORM_string; | |
7288 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
7289 | DW_STRING (comp_dir) = stub_comp_dir; | |
7290 | } | |
b0c7bfa9 DE |
7291 | |
7292 | /* Set up for reading the DWO CU/TU. */ | |
7293 | cu->dwo_unit = dwo_unit; | |
685af9cd | 7294 | dwarf2_section_info *section = dwo_unit->section; |
b0c7bfa9 | 7295 | dwarf2_read_section (objfile, section); |
a32a8923 | 7296 | abfd = get_section_bfd_owner (section); |
9c541725 PA |
7297 | begin_info_ptr = info_ptr = (section->buffer |
7298 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 7299 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
7300 | |
7301 | if (this_cu->is_debug_types) | |
7302 | { | |
b0c7bfa9 DE |
7303 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
7304 | ||
ed2dc618 SM |
7305 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7306 | &cu->header, section, | |
b0c7bfa9 | 7307 | dwo_abbrev_section, |
43988095 | 7308 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 7309 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 7310 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
7311 | { |
7312 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 7313 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 7314 | hex_string (sig_type->signature), |
43988095 | 7315 | hex_string (cu->header.signature), |
9d8780f0 | 7316 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
7317 | bfd_get_filename (abfd)); |
7318 | } | |
9c541725 | 7319 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7320 | /* For DWOs coming from DWP files, we don't know the CU length |
7321 | nor the type's offset in the TU until now. */ | |
7322 | dwo_unit->length = get_cu_length (&cu->header); | |
9c541725 | 7323 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
7324 | |
7325 | /* Establish the type offset that can be used to lookup the type. | |
7326 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
7327 | sig_type->type_offset_in_section |
7328 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
7329 | } |
7330 | else | |
7331 | { | |
ed2dc618 SM |
7332 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7333 | &cu->header, section, | |
b0c7bfa9 | 7334 | dwo_abbrev_section, |
43988095 | 7335 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 7336 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
7337 | /* For DWOs coming from DWP files, we don't know the CU length |
7338 | until now. */ | |
7339 | dwo_unit->length = get_cu_length (&cu->header); | |
7340 | } | |
7341 | ||
685af9cd TT |
7342 | *result_dwo_abbrev_table |
7343 | = abbrev_table_read_table (dwarf2_per_objfile, dwo_abbrev_section, | |
7344 | cu->header.abbrev_sect_off); | |
7345 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, | |
7346 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
7347 | |
7348 | /* Read in the die, but leave space to copy over the attributes | |
7349 | from the stub. This has the benefit of simplifying the rest of | |
7350 | the code - all the work to maintain the illusion of a single | |
7351 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
7352 | num_extra_attrs = ((stmt_list != NULL) | |
7353 | + (low_pc != NULL) | |
7354 | + (high_pc != NULL) | |
7355 | + (ranges != NULL) | |
7356 | + (comp_dir != NULL)); | |
7357 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
7358 | result_has_children, num_extra_attrs); | |
7359 | ||
7360 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
7361 | comp_unit_die = *result_comp_unit_die; | |
7362 | i = comp_unit_die->num_attrs; | |
7363 | if (stmt_list != NULL) | |
7364 | comp_unit_die->attrs[i++] = *stmt_list; | |
7365 | if (low_pc != NULL) | |
7366 | comp_unit_die->attrs[i++] = *low_pc; | |
7367 | if (high_pc != NULL) | |
7368 | comp_unit_die->attrs[i++] = *high_pc; | |
7369 | if (ranges != NULL) | |
7370 | comp_unit_die->attrs[i++] = *ranges; | |
7371 | if (comp_dir != NULL) | |
7372 | comp_unit_die->attrs[i++] = *comp_dir; | |
7373 | comp_unit_die->num_attrs += num_extra_attrs; | |
7374 | ||
b4f54984 | 7375 | if (dwarf_die_debug) |
bf6af496 DE |
7376 | { |
7377 | fprintf_unfiltered (gdb_stdlog, | |
7378 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 7379 | get_section_name (section), |
bf6af496 DE |
7380 | (unsigned) (begin_info_ptr - section->buffer), |
7381 | bfd_get_filename (abfd)); | |
b4f54984 | 7382 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
7383 | } |
7384 | ||
a2ce51a0 DE |
7385 | /* Save the comp_dir attribute. If there is no DWP file then we'll read |
7386 | TUs by skipping the stub and going directly to the entry in the DWO file. | |
7387 | However, skipping the stub means we won't get DW_AT_comp_dir, so we have | |
7388 | to get it via circuitous means. Blech. */ | |
7389 | if (comp_dir != NULL) | |
7390 | result_reader->comp_dir = DW_STRING (comp_dir); | |
7391 | ||
b0c7bfa9 DE |
7392 | /* Skip dummy compilation units. */ |
7393 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
7394 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
7395 | return 0; | |
7396 | ||
7397 | *result_info_ptr = info_ptr; | |
7398 | return 1; | |
7399 | } | |
7400 | ||
a084a2a6 AT |
7401 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
7402 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
7403 | signature is part of the header. */ | |
7404 | static gdb::optional<ULONGEST> | |
7405 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
7406 | { | |
7407 | if (cu->header.version >= 5) | |
7408 | return cu->header.signature; | |
7409 | struct attribute *attr; | |
7410 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
7411 | if (attr == nullptr) | |
7412 | return gdb::optional<ULONGEST> (); | |
7413 | return DW_UNSND (attr); | |
7414 | } | |
7415 | ||
b0c7bfa9 DE |
7416 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
7417 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. | |
6a506a2d | 7418 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
7419 | |
7420 | static struct dwo_unit * | |
7421 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
7422 | struct die_info *comp_unit_die) | |
7423 | { | |
7424 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 DE |
7425 | struct dwo_unit *dwo_unit; |
7426 | const char *comp_dir, *dwo_name; | |
7427 | ||
a2ce51a0 DE |
7428 | gdb_assert (cu != NULL); |
7429 | ||
b0c7bfa9 | 7430 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 7431 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 7432 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
7433 | |
7434 | if (this_cu->is_debug_types) | |
7435 | { | |
7436 | struct signatured_type *sig_type; | |
7437 | ||
7438 | /* Since this_cu is the first member of struct signatured_type, | |
7439 | we can go from a pointer to one to a pointer to the other. */ | |
7440 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
7441 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
7442 | } | |
7443 | else | |
7444 | { | |
a084a2a6 AT |
7445 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
7446 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
7447 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
7448 | " [in module %s]"), | |
e3b94546 | 7449 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 7450 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 7451 | *signature); |
b0c7bfa9 DE |
7452 | } |
7453 | ||
b0c7bfa9 DE |
7454 | return dwo_unit; |
7455 | } | |
7456 | ||
a2ce51a0 | 7457 | /* Subroutine of init_cutu_and_read_dies to simplify it. |
6aa5f3a6 | 7458 | See it for a description of the parameters. |
fcd3b13d | 7459 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 DE |
7460 | |
7461 | static void | |
6aa5f3a6 DE |
7462 | init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, |
7463 | int use_existing_cu, int keep, | |
a2ce51a0 DE |
7464 | die_reader_func_ftype *die_reader_func, |
7465 | void *data) | |
7466 | { | |
fcd3b13d | 7467 | std::unique_ptr<dwarf2_cu> new_cu; |
a2ce51a0 | 7468 | struct signatured_type *sig_type; |
a2ce51a0 DE |
7469 | struct die_reader_specs reader; |
7470 | const gdb_byte *info_ptr; | |
7471 | struct die_info *comp_unit_die; | |
7472 | int has_children; | |
ed2dc618 | 7473 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
a2ce51a0 DE |
7474 | |
7475 | /* Verify we can do the following downcast, and that we have the | |
7476 | data we need. */ | |
7477 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
7478 | sig_type = (struct signatured_type *) this_cu; | |
7479 | gdb_assert (sig_type->dwo_unit != NULL); | |
7480 | ||
6aa5f3a6 DE |
7481 | if (use_existing_cu && this_cu->cu != NULL) |
7482 | { | |
7483 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 DE |
7484 | /* There's no need to do the rereading_dwo_cu handling that |
7485 | init_cutu_and_read_dies does since we don't read the stub. */ | |
7486 | } | |
7487 | else | |
7488 | { | |
7489 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7490 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d | 7491 | new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
7492 | } |
7493 | ||
7494 | /* A future optimization, if needed, would be to use an existing | |
7495 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
7496 | could share abbrev tables. */ | |
a2ce51a0 | 7497 | |
685af9cd TT |
7498 | /* The abbreviation table used by READER, this must live at least as long as |
7499 | READER. */ | |
7500 | abbrev_table_up dwo_abbrev_table; | |
7501 | ||
a2ce51a0 | 7502 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, |
a2ce51a0 DE |
7503 | NULL /* stub_comp_unit_die */, |
7504 | sig_type->dwo_unit->dwo_file->comp_dir, | |
7505 | &reader, &info_ptr, | |
685af9cd TT |
7506 | &comp_unit_die, &has_children, |
7507 | &dwo_abbrev_table) == 0) | |
a2ce51a0 DE |
7508 | { |
7509 | /* Dummy die. */ | |
a2ce51a0 DE |
7510 | return; |
7511 | } | |
7512 | ||
7513 | /* All the "real" work is done here. */ | |
7514 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
7515 | ||
6aa5f3a6 | 7516 | /* This duplicates the code in init_cutu_and_read_dies, |
a2ce51a0 DE |
7517 | but the alternative is making the latter more complex. |
7518 | This function is only for the special case of using DWO files directly: | |
7519 | no point in overly complicating the general case just to handle this. */ | |
fcd3b13d | 7520 | if (new_cu != NULL && keep) |
a2ce51a0 | 7521 | { |
fcd3b13d SM |
7522 | /* Link this CU into read_in_chain. */ |
7523 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7524 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7525 | /* The chain owns it now. */ | |
7526 | new_cu.release (); | |
a2ce51a0 | 7527 | } |
a2ce51a0 DE |
7528 | } |
7529 | ||
fd820528 | 7530 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 7531 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 7532 | |
f4dc4d17 DE |
7533 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
7534 | Otherwise the table specified in the comp unit header is read in and used. | |
7535 | This is an optimization for when we already have the abbrev table. | |
7536 | ||
dee91e82 DE |
7537 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
7538 | Otherwise, a new CU is allocated with xmalloc. | |
7539 | ||
7540 | If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to | |
7541 | read_in_chain. Otherwise the dwarf2_cu data is freed at the end. | |
7542 | ||
7543 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
fd820528 | 7544 | linker) then DIE_READER_FUNC will not get called. */ |
aaa75496 | 7545 | |
70221824 | 7546 | static void |
fd820528 | 7547 | init_cutu_and_read_dies (struct dwarf2_per_cu_data *this_cu, |
f4dc4d17 | 7548 | struct abbrev_table *abbrev_table, |
fd820528 | 7549 | int use_existing_cu, int keep, |
58f0c718 | 7550 | bool skip_partial, |
fd820528 DE |
7551 | die_reader_func_ftype *die_reader_func, |
7552 | void *data) | |
c906108c | 7553 | { |
ed2dc618 | 7554 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7555 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7556 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7557 | bfd *abfd = get_section_bfd_owner (section); |
dee91e82 | 7558 | struct dwarf2_cu *cu; |
d521ce57 | 7559 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7560 | struct die_reader_specs reader; |
d85a05f0 | 7561 | struct die_info *comp_unit_die; |
dee91e82 | 7562 | int has_children; |
dee91e82 | 7563 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 7564 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
7565 | /* Non-zero if CU currently points to a DWO file and we need to |
7566 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 7567 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 7568 | int rereading_dwo_cu = 0; |
c906108c | 7569 | |
b4f54984 | 7570 | if (dwarf_die_debug) |
9d8780f0 | 7571 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7572 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7573 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7574 | |
dee91e82 DE |
7575 | if (use_existing_cu) |
7576 | gdb_assert (keep); | |
23745b47 | 7577 | |
a2ce51a0 DE |
7578 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
7579 | file (instead of going through the stub), short-circuit all of this. */ | |
7580 | if (this_cu->reading_dwo_directly) | |
7581 | { | |
7582 | /* Narrow down the scope of possibilities to have to understand. */ | |
7583 | gdb_assert (this_cu->is_debug_types); | |
7584 | gdb_assert (abbrev_table == NULL); | |
6aa5f3a6 DE |
7585 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu, keep, |
7586 | die_reader_func, data); | |
a2ce51a0 DE |
7587 | return; |
7588 | } | |
7589 | ||
dee91e82 DE |
7590 | /* This is cheap if the section is already read in. */ |
7591 | dwarf2_read_section (objfile, section); | |
7592 | ||
9c541725 | 7593 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
7594 | |
7595 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 | 7596 | |
fcd3b13d | 7597 | std::unique_ptr<dwarf2_cu> new_cu; |
dee91e82 DE |
7598 | if (use_existing_cu && this_cu->cu != NULL) |
7599 | { | |
7600 | cu = this_cu->cu; | |
42e7ad6c DE |
7601 | /* If this CU is from a DWO file we need to start over, we need to |
7602 | refetch the attributes from the skeleton CU. | |
7603 | This could be optimized by retrieving those attributes from when we | |
7604 | were here the first time: the previous comp_unit_die was stored in | |
7605 | comp_unit_obstack. But there's no data yet that we need this | |
7606 | optimization. */ | |
7607 | if (cu->dwo_unit != NULL) | |
7608 | rereading_dwo_cu = 1; | |
dee91e82 DE |
7609 | } |
7610 | else | |
7611 | { | |
7612 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
7613 | gdb_assert (this_cu->cu == NULL); | |
fcd3b13d SM |
7614 | new_cu.reset (new dwarf2_cu (this_cu)); |
7615 | cu = new_cu.get (); | |
42e7ad6c | 7616 | } |
dee91e82 | 7617 | |
b0c7bfa9 | 7618 | /* Get the header. */ |
9c541725 | 7619 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
7620 | { |
7621 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 7622 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
7623 | } |
7624 | else | |
7625 | { | |
3019eac3 | 7626 | if (this_cu->is_debug_types) |
dee91e82 | 7627 | { |
ed2dc618 SM |
7628 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7629 | &cu->header, section, | |
4bdcc0c1 | 7630 | abbrev_section, info_ptr, |
43988095 | 7631 | rcuh_kind::TYPE); |
dee91e82 | 7632 | |
42e7ad6c DE |
7633 | /* Since per_cu is the first member of struct signatured_type, |
7634 | we can go from a pointer to one to a pointer to the other. */ | |
7635 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 7636 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
7637 | gdb_assert (sig_type->type_offset_in_tu |
7638 | == cu->header.type_cu_offset_in_tu); | |
7639 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 7640 | |
42e7ad6c DE |
7641 | /* LENGTH has not been set yet for type units if we're |
7642 | using .gdb_index. */ | |
1ce1cefd | 7643 | this_cu->length = get_cu_length (&cu->header); |
3019eac3 DE |
7644 | |
7645 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
7646 | sig_type->type_offset_in_section = |
7647 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
7648 | |
7649 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
7650 | } |
7651 | else | |
7652 | { | |
ed2dc618 SM |
7653 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7654 | &cu->header, section, | |
4bdcc0c1 | 7655 | abbrev_section, |
43988095 JK |
7656 | info_ptr, |
7657 | rcuh_kind::COMPILE); | |
dee91e82 | 7658 | |
9c541725 | 7659 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
1ce1cefd | 7660 | gdb_assert (this_cu->length == get_cu_length (&cu->header)); |
43988095 | 7661 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
7662 | } |
7663 | } | |
10b3939b | 7664 | |
6caca83c | 7665 | /* Skip dummy compilation units. */ |
dee91e82 | 7666 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 7667 | || peek_abbrev_code (abfd, info_ptr) == 0) |
fcd3b13d | 7668 | return; |
6caca83c | 7669 | |
433df2d4 DE |
7670 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
7671 | And if we need to read them now, make sure they're freed when we're | |
685af9cd TT |
7672 | done (own the table through ABBREV_TABLE_HOLDER). */ |
7673 | abbrev_table_up abbrev_table_holder; | |
f4dc4d17 | 7674 | if (abbrev_table != NULL) |
685af9cd TT |
7675 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
7676 | else | |
f4dc4d17 | 7677 | { |
685af9cd TT |
7678 | abbrev_table_holder |
7679 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7680 | cu->header.abbrev_sect_off); | |
7681 | abbrev_table = abbrev_table_holder.get (); | |
42e7ad6c | 7682 | } |
af703f96 | 7683 | |
dee91e82 | 7684 | /* Read the top level CU/TU die. */ |
685af9cd | 7685 | init_cu_die_reader (&reader, cu, section, NULL, abbrev_table); |
dee91e82 | 7686 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
93311388 | 7687 | |
58f0c718 TT |
7688 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
7689 | return; | |
7690 | ||
b0c7bfa9 | 7691 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
7692 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
7693 | table from the DWO file and pass the ownership over to us. It will be | |
7694 | referenced from READER, so we must make sure to free it after we're done | |
7695 | with READER. | |
7696 | ||
b0c7bfa9 DE |
7697 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
7698 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 7699 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
685af9cd | 7700 | abbrev_table_up dwo_abbrev_table; |
a084a2a6 | 7701 | if (dwo_name != nullptr) |
3019eac3 | 7702 | { |
3019eac3 | 7703 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 7704 | struct die_info *dwo_comp_unit_die; |
3019eac3 DE |
7705 | |
7706 | if (has_children) | |
6a506a2d | 7707 | { |
b98664d3 | 7708 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
7709 | " has children (offset %s) [in module %s]"), |
7710 | sect_offset_str (this_cu->sect_off), | |
7711 | bfd_get_filename (abfd)); | |
6a506a2d | 7712 | } |
b0c7bfa9 | 7713 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die); |
6a506a2d | 7714 | if (dwo_unit != NULL) |
3019eac3 | 7715 | { |
6a506a2d | 7716 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 7717 | comp_unit_die, NULL, |
6a506a2d | 7718 | &reader, &info_ptr, |
685af9cd TT |
7719 | &dwo_comp_unit_die, &has_children, |
7720 | &dwo_abbrev_table) == 0) | |
6a506a2d DE |
7721 | { |
7722 | /* Dummy die. */ | |
6a506a2d DE |
7723 | return; |
7724 | } | |
7725 | comp_unit_die = dwo_comp_unit_die; | |
7726 | } | |
7727 | else | |
7728 | { | |
7729 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
7730 | the stub. A complaint has already been logged. There's | |
7731 | not much more we can do except pass on the stub DIE to | |
7732 | die_reader_func. We don't want to throw an error on bad | |
7733 | debug info. */ | |
3019eac3 DE |
7734 | } |
7735 | } | |
7736 | ||
b0c7bfa9 | 7737 | /* All of the above is setup for this call. Yikes. */ |
dee91e82 DE |
7738 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); |
7739 | ||
b0c7bfa9 | 7740 | /* Done, clean up. */ |
fcd3b13d | 7741 | if (new_cu != NULL && keep) |
348e048f | 7742 | { |
fcd3b13d SM |
7743 | /* Link this CU into read_in_chain. */ |
7744 | this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; | |
7745 | dwarf2_per_objfile->read_in_chain = this_cu; | |
7746 | /* The chain owns it now. */ | |
7747 | new_cu.release (); | |
348e048f | 7748 | } |
dee91e82 DE |
7749 | } |
7750 | ||
33e80786 DE |
7751 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present. |
7752 | DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed | |
7753 | to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7754 | |
7755 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7756 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7757 | |
7758 | We fill in THIS_CU->length. | |
7759 | ||
7760 | WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental | |
7761 | linker) then DIE_READER_FUNC will not get called. | |
7762 | ||
7763 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7764 | This is done in order to not leave THIS_CU->cu in a state where we have |
7765 | to care whether it refers to the "main" CU or the DWO CU. */ | |
dee91e82 DE |
7766 | |
7767 | static void | |
7768 | init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data *this_cu, | |
3019eac3 | 7769 | struct dwo_file *dwo_file, |
dee91e82 DE |
7770 | die_reader_func_ftype *die_reader_func, |
7771 | void *data) | |
7772 | { | |
ed2dc618 | 7773 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7774 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7775 | struct dwarf2_section_info *section = this_cu->section; |
a32a8923 | 7776 | bfd *abfd = get_section_bfd_owner (section); |
33e80786 | 7777 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7778 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7779 | struct die_reader_specs reader; |
dee91e82 DE |
7780 | struct die_info *comp_unit_die; |
7781 | int has_children; | |
7782 | ||
b4f54984 | 7783 | if (dwarf_die_debug) |
9d8780f0 | 7784 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7785 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7786 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7787 | |
dee91e82 DE |
7788 | gdb_assert (this_cu->cu == NULL); |
7789 | ||
33e80786 DE |
7790 | abbrev_section = (dwo_file != NULL |
7791 | ? &dwo_file->sections.abbrev | |
7792 | : get_abbrev_section_for_cu (this_cu)); | |
7793 | ||
dee91e82 DE |
7794 | /* This is cheap if the section is already read in. */ |
7795 | dwarf2_read_section (objfile, section); | |
7796 | ||
fcd3b13d | 7797 | struct dwarf2_cu cu (this_cu); |
dee91e82 | 7798 | |
9c541725 | 7799 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 SM |
7800 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
7801 | &cu.header, section, | |
4bdcc0c1 | 7802 | abbrev_section, info_ptr, |
43988095 JK |
7803 | (this_cu->is_debug_types |
7804 | ? rcuh_kind::TYPE | |
7805 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7806 | |
1ce1cefd | 7807 | this_cu->length = get_cu_length (&cu.header); |
dee91e82 DE |
7808 | |
7809 | /* Skip dummy compilation units. */ | |
7810 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7811 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
fcd3b13d | 7812 | return; |
72bf9492 | 7813 | |
685af9cd TT |
7814 | abbrev_table_up abbrev_table |
7815 | = abbrev_table_read_table (dwarf2_per_objfile, abbrev_section, | |
7816 | cu.header.abbrev_sect_off); | |
dee91e82 | 7817 | |
685af9cd | 7818 | init_cu_die_reader (&reader, &cu, section, dwo_file, abbrev_table.get ()); |
dee91e82 DE |
7819 | info_ptr = read_full_die (&reader, &comp_unit_die, info_ptr, &has_children); |
7820 | ||
7821 | die_reader_func (&reader, info_ptr, comp_unit_die, has_children, data); | |
dee91e82 DE |
7822 | } |
7823 | ||
3019eac3 DE |
7824 | /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and |
7825 | does not lookup the specified DWO file. | |
7826 | This cannot be used to read DWO files. | |
dee91e82 DE |
7827 | |
7828 | THIS_CU->cu is always freed when done. | |
3019eac3 DE |
7829 | This is done in order to not leave THIS_CU->cu in a state where we have |
7830 | to care whether it refers to the "main" CU or the DWO CU. | |
7831 | We can revisit this if the data shows there's a performance issue. */ | |
dee91e82 DE |
7832 | |
7833 | static void | |
7834 | init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data *this_cu, | |
7835 | die_reader_func_ftype *die_reader_func, | |
7836 | void *data) | |
7837 | { | |
33e80786 | 7838 | init_cutu_and_read_dies_no_follow (this_cu, NULL, die_reader_func, data); |
dee91e82 | 7839 | } |
0018ea6f DE |
7840 | \f |
7841 | /* Type Unit Groups. | |
dee91e82 | 7842 | |
0018ea6f DE |
7843 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7844 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7845 | so that all types coming from the same compilation (.o file) are grouped | |
7846 | together. A future step could be to put the types in the same symtab as | |
7847 | the CU the types ultimately came from. */ | |
ff013f42 | 7848 | |
f4dc4d17 DE |
7849 | static hashval_t |
7850 | hash_type_unit_group (const void *item) | |
7851 | { | |
9a3c8263 SM |
7852 | const struct type_unit_group *tu_group |
7853 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7854 | |
094b34ac | 7855 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7856 | } |
348e048f DE |
7857 | |
7858 | static int | |
f4dc4d17 | 7859 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7860 | { |
9a3c8263 SM |
7861 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7862 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7863 | |
094b34ac | 7864 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7865 | } |
348e048f | 7866 | |
f4dc4d17 DE |
7867 | /* Allocate a hash table for type unit groups. */ |
7868 | ||
7869 | static htab_t | |
ed2dc618 | 7870 | allocate_type_unit_groups_table (struct objfile *objfile) |
f4dc4d17 DE |
7871 | { |
7872 | return htab_create_alloc_ex (3, | |
7873 | hash_type_unit_group, | |
7874 | eq_type_unit_group, | |
7875 | NULL, | |
ed2dc618 | 7876 | &objfile->objfile_obstack, |
f4dc4d17 DE |
7877 | hashtab_obstack_allocate, |
7878 | dummy_obstack_deallocate); | |
7879 | } | |
dee91e82 | 7880 | |
f4dc4d17 DE |
7881 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7882 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7883 | of any one psymtab grow too big. */ | |
7884 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7885 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7886 | |
094b34ac | 7887 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7888 | Create the type_unit_group object used to hold one or more TUs. */ |
7889 | ||
7890 | static struct type_unit_group * | |
094b34ac | 7891 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7892 | { |
518817b3 SM |
7893 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7894 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7895 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7896 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7897 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7898 | |
7899 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7900 | struct type_unit_group); | |
094b34ac | 7901 | per_cu = &tu_group->per_cu; |
518817b3 | 7902 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7903 | |
094b34ac DE |
7904 | if (dwarf2_per_objfile->using_index) |
7905 | { | |
7906 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7907 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7908 | } |
7909 | else | |
7910 | { | |
9c541725 | 7911 | unsigned int line_offset = to_underlying (line_offset_struct); |
094b34ac | 7912 | struct partial_symtab *pst; |
528e1572 | 7913 | std::string name; |
094b34ac DE |
7914 | |
7915 | /* Give the symtab a useful name for debug purposes. */ | |
7916 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7917 | name = string_printf ("<type_units_%d>", |
7918 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7919 | else |
528e1572 | 7920 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7921 | |
528e1572 | 7922 | pst = create_partial_symtab (per_cu, name.c_str ()); |
094b34ac | 7923 | pst->anonymous = 1; |
094b34ac | 7924 | } |
f4dc4d17 | 7925 | |
094b34ac | 7926 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7927 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7928 | |
7929 | return tu_group; | |
7930 | } | |
7931 | ||
094b34ac DE |
7932 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7933 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7934 | |
7935 | static struct type_unit_group * | |
ff39bb5e | 7936 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7937 | { |
518817b3 SM |
7938 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7939 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7940 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7941 | struct type_unit_group *tu_group; | |
7942 | void **slot; | |
7943 | unsigned int line_offset; | |
7944 | struct type_unit_group type_unit_group_for_lookup; | |
7945 | ||
7946 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
7947 | { | |
7948 | dwarf2_per_objfile->type_unit_groups = | |
ed2dc618 | 7949 | allocate_type_unit_groups_table (dwarf2_per_objfile->objfile); |
f4dc4d17 DE |
7950 | } |
7951 | ||
7952 | /* Do we need to create a new group, or can we use an existing one? */ | |
7953 | ||
7954 | if (stmt_list) | |
7955 | { | |
7956 | line_offset = DW_UNSND (stmt_list); | |
7957 | ++tu_stats->nr_symtab_sharers; | |
7958 | } | |
7959 | else | |
7960 | { | |
7961 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7962 | We can do various things here like create one group per TU or | |
7963 | spread them over multiple groups to split up the expansion work. | |
7964 | To avoid worst case scenarios (too many groups or too large groups) | |
7965 | we, umm, group them in bunches. */ | |
7966 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7967 | | (tu_stats->nr_stmt_less_type_units | |
7968 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7969 | ++tu_stats->nr_stmt_less_type_units; | |
7970 | } | |
7971 | ||
094b34ac | 7972 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7973 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
f4dc4d17 DE |
7974 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups, |
7975 | &type_unit_group_for_lookup, INSERT); | |
7976 | if (*slot != NULL) | |
7977 | { | |
9a3c8263 | 7978 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7979 | gdb_assert (tu_group != NULL); |
7980 | } | |
7981 | else | |
7982 | { | |
9c541725 | 7983 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7984 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7985 | *slot = tu_group; |
7986 | ++tu_stats->nr_symtabs; | |
7987 | } | |
7988 | ||
7989 | return tu_group; | |
7990 | } | |
0018ea6f DE |
7991 | \f |
7992 | /* Partial symbol tables. */ | |
7993 | ||
7994 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7995 | ||
7996 | The caller must fill in the following details: | |
7997 | dirname, textlow, texthigh. */ | |
7998 | ||
7999 | static struct partial_symtab * | |
8000 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) | |
8001 | { | |
e3b94546 | 8002 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
0018ea6f DE |
8003 | struct partial_symtab *pst; |
8004 | ||
939652a5 | 8005 | pst = start_psymtab_common (objfile, name, 0); |
0018ea6f DE |
8006 | |
8007 | pst->psymtabs_addrmap_supported = 1; | |
8008 | ||
8009 | /* This is the glue that links PST into GDB's symbol API. */ | |
8010 | pst->read_symtab_private = per_cu; | |
8011 | pst->read_symtab = dwarf2_read_symtab; | |
8012 | per_cu->v.psymtab = pst; | |
8013 | ||
8014 | return pst; | |
8015 | } | |
8016 | ||
b93601f3 TT |
8017 | /* The DATA object passed to process_psymtab_comp_unit_reader has this |
8018 | type. */ | |
8019 | ||
8020 | struct process_psymtab_comp_unit_data | |
8021 | { | |
8022 | /* True if we are reading a DW_TAG_partial_unit. */ | |
8023 | ||
8024 | int want_partial_unit; | |
8025 | ||
8026 | /* The "pretend" language that is used if the CU doesn't declare a | |
8027 | language. */ | |
8028 | ||
8029 | enum language pretend_language; | |
8030 | }; | |
8031 | ||
0018ea6f DE |
8032 | /* die_reader_func for process_psymtab_comp_unit. */ |
8033 | ||
8034 | static void | |
8035 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8036 | const gdb_byte *info_ptr, |
0018ea6f DE |
8037 | struct die_info *comp_unit_die, |
8038 | int has_children, | |
8039 | void *data) | |
8040 | { | |
8041 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 8042 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 8043 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 8044 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
8045 | CORE_ADDR baseaddr; |
8046 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
8047 | struct partial_symtab *pst; | |
3a2b436a | 8048 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 8049 | const char *filename; |
9a3c8263 SM |
8050 | struct process_psymtab_comp_unit_data *info |
8051 | = (struct process_psymtab_comp_unit_data *) data; | |
0018ea6f | 8052 | |
b93601f3 | 8053 | if (comp_unit_die->tag == DW_TAG_partial_unit && !info->want_partial_unit) |
0018ea6f DE |
8054 | return; |
8055 | ||
8056 | gdb_assert (! per_cu->is_debug_types); | |
8057 | ||
b93601f3 | 8058 | prepare_one_comp_unit (cu, comp_unit_die, info->pretend_language); |
0018ea6f | 8059 | |
0018ea6f | 8060 | /* Allocate a new partial symbol table structure. */ |
7d45c7c3 KB |
8061 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
8062 | if (filename == NULL) | |
0018ea6f | 8063 | filename = ""; |
0018ea6f DE |
8064 | |
8065 | pst = create_partial_symtab (per_cu, filename); | |
8066 | ||
8067 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 8068 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 8069 | |
6a053cb1 | 8070 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
0018ea6f DE |
8071 | |
8072 | dwarf2_find_base_address (comp_unit_die, cu); | |
8073 | ||
8074 | /* Possibly set the default values of LOWPC and HIGHPC from | |
8075 | `DW_AT_ranges'. */ | |
3a2b436a JK |
8076 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
8077 | &best_highpc, cu, pst); | |
8078 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
8079 | { |
8080 | CORE_ADDR low | |
8081 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
8082 | - baseaddr); | |
8083 | CORE_ADDR high | |
8084 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
8085 | - baseaddr - 1); | |
8086 | /* Store the contiguous range if it is not empty; it can be | |
8087 | empty for CUs with no code. */ | |
d320c2b5 TT |
8088 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
8089 | low, high, pst); | |
79748972 | 8090 | } |
0018ea6f DE |
8091 | |
8092 | /* Check if comp unit has_children. | |
8093 | If so, read the rest of the partial symbols from this comp unit. | |
8094 | If not, there's no more debug_info for this comp unit. */ | |
8095 | if (has_children) | |
8096 | { | |
8097 | struct partial_die_info *first_die; | |
8098 | CORE_ADDR lowpc, highpc; | |
8099 | ||
8100 | lowpc = ((CORE_ADDR) -1); | |
8101 | highpc = ((CORE_ADDR) 0); | |
8102 | ||
8103 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8104 | ||
8105 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 8106 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
8107 | |
8108 | /* If we didn't find a lowpc, set it to highpc to avoid | |
8109 | complaints from `maint check'. */ | |
8110 | if (lowpc == ((CORE_ADDR) -1)) | |
8111 | lowpc = highpc; | |
8112 | ||
8113 | /* If the compilation unit didn't have an explicit address range, | |
8114 | then use the information extracted from its child dies. */ | |
e385593e | 8115 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
8116 | { |
8117 | best_lowpc = lowpc; | |
8118 | best_highpc = highpc; | |
8119 | } | |
8120 | } | |
4ae976d1 | 8121 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
8122 | best_lowpc + baseaddr) |
8123 | - baseaddr); | |
4ae976d1 | 8124 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
8125 | best_highpc + baseaddr) |
8126 | - baseaddr); | |
0018ea6f | 8127 | |
8763cede | 8128 | end_psymtab_common (objfile, pst); |
0018ea6f | 8129 | |
ae640021 | 8130 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
8131 | { |
8132 | int i; | |
ae640021 | 8133 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
8134 | |
8135 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
8136 | post-pass. */ | |
8137 | pst->number_of_dependencies = len; | |
a9342b62 TT |
8138 | pst->dependencies |
8139 | = objfile->partial_symtabs->allocate_dependencies (len); | |
ae640021 AB |
8140 | for (i = 0; i < len; ++i) |
8141 | { | |
8142 | pst->dependencies[i] | |
8143 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
8144 | } | |
0018ea6f | 8145 | |
ae640021 | 8146 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
8147 | } |
8148 | ||
8149 | /* Get the list of files included in the current compilation unit, | |
8150 | and build a psymtab for each of them. */ | |
8151 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
8152 | ||
b4f54984 | 8153 | if (dwarf_read_debug) |
b926417a TT |
8154 | fprintf_unfiltered (gdb_stdlog, |
8155 | "Psymtab for %s unit @%s: %s - %s" | |
8156 | ", %d global, %d static syms\n", | |
8157 | per_cu->is_debug_types ? "type" : "comp", | |
8158 | sect_offset_str (per_cu->sect_off), | |
8159 | paddress (gdbarch, pst->text_low (objfile)), | |
8160 | paddress (gdbarch, pst->text_high (objfile)), | |
8161 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
8162 | } |
8163 | ||
8164 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8165 | Process compilation unit THIS_CU for a psymtab. */ | |
8166 | ||
8167 | static void | |
8168 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
b93601f3 TT |
8169 | int want_partial_unit, |
8170 | enum language pretend_language) | |
0018ea6f DE |
8171 | { |
8172 | /* If this compilation unit was already read in, free the | |
8173 | cached copy in order to read it in again. This is | |
8174 | necessary because we skipped some symbols when we first | |
8175 | read in the compilation unit (see load_partial_dies). | |
8176 | This problem could be avoided, but the benefit is unclear. */ | |
8177 | if (this_cu->cu != NULL) | |
8178 | free_one_cached_comp_unit (this_cu); | |
8179 | ||
f1902523 | 8180 | if (this_cu->is_debug_types) |
58f0c718 TT |
8181 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
8182 | build_type_psymtabs_reader, NULL); | |
f1902523 JK |
8183 | else |
8184 | { | |
8185 | process_psymtab_comp_unit_data info; | |
8186 | info.want_partial_unit = want_partial_unit; | |
8187 | info.pretend_language = pretend_language; | |
58f0c718 | 8188 | init_cutu_and_read_dies (this_cu, NULL, 0, 0, false, |
f1902523 JK |
8189 | process_psymtab_comp_unit_reader, &info); |
8190 | } | |
0018ea6f DE |
8191 | |
8192 | /* Age out any secondary CUs. */ | |
ed2dc618 | 8193 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 8194 | } |
f4dc4d17 DE |
8195 | |
8196 | /* Reader function for build_type_psymtabs. */ | |
8197 | ||
8198 | static void | |
8199 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 8200 | const gdb_byte *info_ptr, |
f4dc4d17 DE |
8201 | struct die_info *type_unit_die, |
8202 | int has_children, | |
8203 | void *data) | |
8204 | { | |
ed2dc618 | 8205 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 8206 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
8207 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8208 | struct dwarf2_cu *cu = reader->cu; | |
8209 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 8210 | struct signatured_type *sig_type; |
f4dc4d17 DE |
8211 | struct type_unit_group *tu_group; |
8212 | struct attribute *attr; | |
8213 | struct partial_die_info *first_die; | |
8214 | CORE_ADDR lowpc, highpc; | |
8215 | struct partial_symtab *pst; | |
8216 | ||
8217 | gdb_assert (data == NULL); | |
0186c6a7 DE |
8218 | gdb_assert (per_cu->is_debug_types); |
8219 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 DE |
8220 | |
8221 | if (! has_children) | |
8222 | return; | |
8223 | ||
8224 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 8225 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 8226 | |
df07e2c7 | 8227 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 8228 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 8229 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
8230 | |
8231 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 DE |
8232 | pst = create_partial_symtab (per_cu, ""); |
8233 | pst->anonymous = 1; | |
8234 | ||
8235 | first_die = load_partial_dies (reader, info_ptr, 1); | |
8236 | ||
8237 | lowpc = (CORE_ADDR) -1; | |
8238 | highpc = (CORE_ADDR) 0; | |
8239 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
8240 | ||
8763cede | 8241 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
8242 | } |
8243 | ||
73051182 DE |
8244 | /* Struct used to sort TUs by their abbreviation table offset. */ |
8245 | ||
8246 | struct tu_abbrev_offset | |
8247 | { | |
b2bdb8cf SM |
8248 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
8249 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
8250 | {} | |
8251 | ||
8252 | signatured_type *sig_type; | |
73051182 DE |
8253 | sect_offset abbrev_offset; |
8254 | }; | |
8255 | ||
484cf504 | 8256 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 8257 | |
484cf504 TT |
8258 | static bool |
8259 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
8260 | const struct tu_abbrev_offset &b) | |
73051182 | 8261 | { |
484cf504 | 8262 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
8263 | } |
8264 | ||
8265 | /* Efficiently read all the type units. | |
8266 | This does the bulk of the work for build_type_psymtabs. | |
8267 | ||
8268 | The efficiency is because we sort TUs by the abbrev table they use and | |
8269 | only read each abbrev table once. In one program there are 200K TUs | |
8270 | sharing 8K abbrev tables. | |
8271 | ||
8272 | The main purpose of this function is to support building the | |
8273 | dwarf2_per_objfile->type_unit_groups table. | |
8274 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
8275 | can collapse the search space by grouping them by stmt_list. | |
8276 | The savings can be significant, in the same program from above the 200K TUs | |
8277 | share 8K stmt_list tables. | |
8278 | ||
8279 | FUNC is expected to call get_type_unit_group, which will create the | |
8280 | struct type_unit_group if necessary and add it to | |
8281 | dwarf2_per_objfile->type_unit_groups. */ | |
8282 | ||
8283 | static void | |
ed2dc618 | 8284 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 8285 | { |
73051182 | 8286 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 8287 | abbrev_table_up abbrev_table; |
73051182 | 8288 | sect_offset abbrev_offset; |
73051182 DE |
8289 | |
8290 | /* It's up to the caller to not call us multiple times. */ | |
8291 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
8292 | ||
b2bdb8cf | 8293 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
8294 | return; |
8295 | ||
8296 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
8297 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
8298 | read each abbrev table in. | |
8299 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
8300 | This is simpler and efficient enough for now. | |
8301 | ||
8302 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
8303 | symtab to use). Typically TUs with the same abbrev offset have the same | |
8304 | stmt_list value too so in practice this should work well. | |
8305 | ||
8306 | The basic algorithm here is: | |
8307 | ||
8308 | sort TUs by abbrev table | |
8309 | for each TU with same abbrev table: | |
8310 | read abbrev table if first user | |
8311 | read TU top level DIE | |
8312 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
8313 | call FUNC */ | |
8314 | ||
b4f54984 | 8315 | if (dwarf_read_debug) |
73051182 DE |
8316 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
8317 | ||
8318 | /* Sort in a separate table to maintain the order of all_type_units | |
8319 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
8320 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
8321 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
8322 | ||
8323 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
8324 | sorted_by_abbrev.emplace_back | |
8325 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
8326 | sig_type->per_cu.section, | |
8327 | sig_type->per_cu.sect_off)); | |
73051182 | 8328 | |
484cf504 TT |
8329 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
8330 | sort_tu_by_abbrev_offset); | |
73051182 | 8331 | |
9c541725 | 8332 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 8333 | |
b2bdb8cf | 8334 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 8335 | { |
73051182 DE |
8336 | /* Switch to the next abbrev table if necessary. */ |
8337 | if (abbrev_table == NULL | |
b2bdb8cf | 8338 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 8339 | { |
b2bdb8cf | 8340 | abbrev_offset = tu.abbrev_offset; |
73051182 | 8341 | abbrev_table = |
ed2dc618 SM |
8342 | abbrev_table_read_table (dwarf2_per_objfile, |
8343 | &dwarf2_per_objfile->abbrev, | |
73051182 DE |
8344 | abbrev_offset); |
8345 | ++tu_stats->nr_uniq_abbrev_tables; | |
8346 | } | |
8347 | ||
b2bdb8cf | 8348 | init_cutu_and_read_dies (&tu.sig_type->per_cu, abbrev_table.get (), |
58f0c718 | 8349 | 0, 0, false, build_type_psymtabs_reader, NULL); |
73051182 | 8350 | } |
6aa5f3a6 | 8351 | } |
73051182 | 8352 | |
6aa5f3a6 DE |
8353 | /* Print collected type unit statistics. */ |
8354 | ||
8355 | static void | |
ed2dc618 | 8356 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8357 | { |
8358 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
8359 | ||
8360 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
8361 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
8362 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
8363 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
8364 | tu_stats->nr_uniq_abbrev_tables); | |
8365 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
8366 | tu_stats->nr_symtabs); | |
8367 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
8368 | tu_stats->nr_symtab_sharers); | |
8369 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
8370 | tu_stats->nr_stmt_less_type_units); | |
8371 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
8372 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
8373 | } |
8374 | ||
f4dc4d17 DE |
8375 | /* Traversal function for build_type_psymtabs. */ |
8376 | ||
8377 | static int | |
8378 | build_type_psymtab_dependencies (void **slot, void *info) | |
8379 | { | |
ed2dc618 SM |
8380 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8381 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
8382 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8383 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 8384 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
f4dc4d17 | 8385 | struct partial_symtab *pst = per_cu->v.psymtab; |
df07e2c7 | 8386 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
8387 | int i; |
8388 | ||
8389 | gdb_assert (len > 0); | |
0186c6a7 | 8390 | gdb_assert (IS_TYPE_UNIT_GROUP (per_cu)); |
f4dc4d17 DE |
8391 | |
8392 | pst->number_of_dependencies = len; | |
a9342b62 | 8393 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 8394 | for (i = 0; i < len; ++i) |
f4dc4d17 | 8395 | { |
df07e2c7 | 8396 | struct signatured_type *iter = tu_group->tus->at (i); |
0186c6a7 DE |
8397 | gdb_assert (iter->per_cu.is_debug_types); |
8398 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 8399 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
8400 | } |
8401 | ||
df07e2c7 AB |
8402 | delete tu_group->tus; |
8403 | tu_group->tus = nullptr; | |
348e048f DE |
8404 | |
8405 | return 1; | |
8406 | } | |
8407 | ||
8408 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
8409 | Build partial symbol tables for the .debug_types comp-units. */ | |
8410 | ||
8411 | static void | |
ed2dc618 | 8412 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 8413 | { |
ed2dc618 | 8414 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
8415 | return; |
8416 | ||
ed2dc618 | 8417 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 8418 | } |
f4dc4d17 | 8419 | |
6aa5f3a6 DE |
8420 | /* Traversal function for process_skeletonless_type_unit. |
8421 | Read a TU in a DWO file and build partial symbols for it. */ | |
8422 | ||
8423 | static int | |
8424 | process_skeletonless_type_unit (void **slot, void *info) | |
8425 | { | |
8426 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
8427 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8428 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
8429 | struct signatured_type find_entry, *entry; |
8430 | ||
8431 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
8432 | ||
8433 | if (dwarf2_per_objfile->signatured_types == NULL) | |
8434 | { | |
8435 | dwarf2_per_objfile->signatured_types | |
ed2dc618 | 8436 | = allocate_signatured_type_table (dwarf2_per_objfile->objfile); |
6aa5f3a6 DE |
8437 | } |
8438 | ||
8439 | find_entry.signature = dwo_unit->signature; | |
8440 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types, &find_entry, | |
8441 | INSERT); | |
8442 | /* If we've already seen this type there's nothing to do. What's happening | |
8443 | is we're doing our own version of comdat-folding here. */ | |
8444 | if (*slot != NULL) | |
8445 | return 1; | |
8446 | ||
8447 | /* This does the job that create_all_type_units would have done for | |
8448 | this TU. */ | |
ed2dc618 SM |
8449 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
8450 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
8451 | *slot = entry; |
8452 | ||
8453 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
58f0c718 | 8454 | init_cutu_and_read_dies (&entry->per_cu, NULL, 0, 0, false, |
6aa5f3a6 DE |
8455 | build_type_psymtabs_reader, NULL); |
8456 | ||
8457 | return 1; | |
8458 | } | |
8459 | ||
8460 | /* Traversal function for process_skeletonless_type_units. */ | |
8461 | ||
8462 | static int | |
8463 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
8464 | { | |
8465 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
8466 | ||
8467 | if (dwo_file->tus != NULL) | |
8468 | { | |
8469 | htab_traverse_noresize (dwo_file->tus, | |
8470 | process_skeletonless_type_unit, info); | |
8471 | } | |
8472 | ||
8473 | return 1; | |
8474 | } | |
8475 | ||
8476 | /* Scan all TUs of DWO files, verifying we've processed them. | |
8477 | This is needed in case a TU was emitted without its skeleton. | |
8478 | Note: This can't be done until we know what all the DWO files are. */ | |
8479 | ||
8480 | static void | |
ed2dc618 | 8481 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
8482 | { |
8483 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 8484 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
8485 | && dwarf2_per_objfile->dwo_files != NULL) |
8486 | { | |
51ac9db5 | 8487 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 8488 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 8489 | dwarf2_per_objfile); |
6aa5f3a6 | 8490 | } |
348e048f DE |
8491 | } |
8492 | ||
ed2dc618 | 8493 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
8494 | |
8495 | static void | |
ed2dc618 | 8496 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 8497 | { |
b76e467d | 8498 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 8499 | { |
95554aad | 8500 | struct partial_symtab *pst = per_cu->v.psymtab; |
95554aad | 8501 | |
36586728 TT |
8502 | if (pst == NULL) |
8503 | continue; | |
8504 | ||
b76e467d | 8505 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
8506 | { |
8507 | /* Set the 'user' field only if it is not already set. */ | |
8508 | if (pst->dependencies[j]->user == NULL) | |
8509 | pst->dependencies[j]->user = pst; | |
8510 | } | |
8511 | } | |
8512 | } | |
8513 | ||
93311388 DE |
8514 | /* Build the partial symbol table by doing a quick pass through the |
8515 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 8516 | |
93311388 | 8517 | static void |
ed2dc618 | 8518 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 8519 | { |
ed2dc618 | 8520 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 8521 | |
b4f54984 | 8522 | if (dwarf_read_debug) |
45cfd468 DE |
8523 | { |
8524 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 8525 | objfile_name (objfile)); |
45cfd468 DE |
8526 | } |
8527 | ||
98bfdba5 PA |
8528 | dwarf2_per_objfile->reading_partial_symbols = 1; |
8529 | ||
be391dca | 8530 | dwarf2_read_section (objfile, &dwarf2_per_objfile->info); |
91c24f0a | 8531 | |
93311388 DE |
8532 | /* Any cached compilation units will be linked by the per-objfile |
8533 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 8534 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 8535 | |
ed2dc618 | 8536 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 8537 | |
ed2dc618 | 8538 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 8539 | |
60606b2c TT |
8540 | /* Create a temporary address map on a temporary obstack. We later |
8541 | copy this to the final obstack. */ | |
8268c778 | 8542 | auto_obstack temp_obstack; |
791afaa2 TT |
8543 | |
8544 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 8545 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 8546 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 8547 | |
b76e467d SM |
8548 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
8549 | process_psymtab_comp_unit (per_cu, 0, language_minimal); | |
ff013f42 | 8550 | |
6aa5f3a6 | 8551 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 8552 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
8553 | |
8554 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
8555 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
8556 | { | |
8557 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups, | |
ed2dc618 | 8558 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
8559 | } |
8560 | ||
b4f54984 | 8561 | if (dwarf_read_debug) |
ed2dc618 | 8562 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 8563 | |
ed2dc618 | 8564 | set_partial_user (dwarf2_per_objfile); |
95554aad | 8565 | |
d320c2b5 TT |
8566 | objfile->partial_symtabs->psymtabs_addrmap |
8567 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 8568 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
8569 | /* At this point we want to keep the address map. */ |
8570 | save_psymtabs_addrmap.release (); | |
ff013f42 | 8571 | |
b4f54984 | 8572 | if (dwarf_read_debug) |
45cfd468 | 8573 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 8574 | objfile_name (objfile)); |
ae038cb0 DJ |
8575 | } |
8576 | ||
3019eac3 | 8577 | /* die_reader_func for load_partial_comp_unit. */ |
ae038cb0 DJ |
8578 | |
8579 | static void | |
dee91e82 | 8580 | load_partial_comp_unit_reader (const struct die_reader_specs *reader, |
d521ce57 | 8581 | const gdb_byte *info_ptr, |
dee91e82 DE |
8582 | struct die_info *comp_unit_die, |
8583 | int has_children, | |
8584 | void *data) | |
ae038cb0 | 8585 | { |
dee91e82 | 8586 | struct dwarf2_cu *cu = reader->cu; |
ae038cb0 | 8587 | |
95554aad | 8588 | prepare_one_comp_unit (cu, comp_unit_die, language_minimal); |
ae038cb0 | 8589 | |
ae038cb0 DJ |
8590 | /* Check if comp unit has_children. |
8591 | If so, read the rest of the partial symbols from this comp unit. | |
0963b4bd | 8592 | If not, there's no more debug_info for this comp unit. */ |
d85a05f0 | 8593 | if (has_children) |
dee91e82 DE |
8594 | load_partial_dies (reader, info_ptr, 0); |
8595 | } | |
98bfdba5 | 8596 | |
dee91e82 DE |
8597 | /* Load the partial DIEs for a secondary CU into memory. |
8598 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 8599 | |
dee91e82 DE |
8600 | static void |
8601 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
8602 | { | |
58f0c718 | 8603 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, false, |
f4dc4d17 | 8604 | load_partial_comp_unit_reader, NULL); |
ae038cb0 DJ |
8605 | } |
8606 | ||
ae038cb0 | 8607 | static void |
ed2dc618 | 8608 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 8609 | struct dwarf2_section_info *section, |
f1902523 | 8610 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 8611 | unsigned int is_dwz) |
ae038cb0 | 8612 | { |
d521ce57 | 8613 | const gdb_byte *info_ptr; |
ed2dc618 | 8614 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 8615 | |
b4f54984 | 8616 | if (dwarf_read_debug) |
bf6af496 | 8617 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
a32a8923 DE |
8618 | get_section_name (section), |
8619 | get_section_file_name (section)); | |
bf6af496 | 8620 | |
36586728 | 8621 | dwarf2_read_section (objfile, section); |
ae038cb0 | 8622 | |
36586728 | 8623 | info_ptr = section->buffer; |
6e70227d | 8624 | |
36586728 | 8625 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 8626 | { |
ae038cb0 | 8627 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 8628 | |
9c541725 | 8629 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 8630 | |
f1902523 | 8631 | comp_unit_head cu_header; |
ed2dc618 SM |
8632 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
8633 | abbrev_section, info_ptr, | |
8634 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
8635 | |
8636 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
8637 | if (cu_header.unit_type != DW_UT_type) |
8638 | { | |
8639 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
8640 | struct dwarf2_per_cu_data); | |
8641 | memset (this_cu, 0, sizeof (*this_cu)); | |
8642 | } | |
8643 | else | |
8644 | { | |
8645 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
8646 | struct signatured_type); | |
8647 | memset (sig_type, 0, sizeof (*sig_type)); | |
8648 | sig_type->signature = cu_header.signature; | |
8649 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
8650 | this_cu = &sig_type->per_cu; | |
8651 | } | |
8652 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 8653 | this_cu->sect_off = sect_off; |
f1902523 | 8654 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 8655 | this_cu->is_dwz = is_dwz; |
e3b94546 | 8656 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 8657 | this_cu->section = section; |
ae038cb0 | 8658 | |
b76e467d | 8659 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
8660 | |
8661 | info_ptr = info_ptr + this_cu->length; | |
8662 | } | |
36586728 TT |
8663 | } |
8664 | ||
8665 | /* Create a list of all compilation units in OBJFILE. | |
8666 | This is only done for -readnow and building partial symtabs. */ | |
8667 | ||
8668 | static void | |
ed2dc618 | 8669 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 8670 | { |
b76e467d | 8671 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 8672 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 8673 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 8674 | |
b76e467d | 8675 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 8676 | if (dwz != NULL) |
ed2dc618 | 8677 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 8678 | 1); |
c906108c SS |
8679 | } |
8680 | ||
5734ee8b | 8681 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 8682 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 8683 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
8684 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
8685 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 8686 | |
72bf9492 DJ |
8687 | static void |
8688 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
8689 | CORE_ADDR *highpc, int set_addrmap, |
8690 | struct dwarf2_cu *cu) | |
c906108c | 8691 | { |
72bf9492 | 8692 | struct partial_die_info *pdi; |
c906108c | 8693 | |
91c24f0a DC |
8694 | /* Now, march along the PDI's, descending into ones which have |
8695 | interesting children but skipping the children of the other ones, | |
8696 | until we reach the end of the compilation unit. */ | |
c906108c | 8697 | |
72bf9492 | 8698 | pdi = first_die; |
91c24f0a | 8699 | |
72bf9492 DJ |
8700 | while (pdi != NULL) |
8701 | { | |
52356b79 | 8702 | pdi->fixup (cu); |
c906108c | 8703 | |
f55ee35c | 8704 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
8705 | children, so we need to look at them. Ditto for anonymous |
8706 | enums. */ | |
933c6fe4 | 8707 | |
72bf9492 | 8708 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 8709 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
8710 | || pdi->tag == DW_TAG_imported_unit |
8711 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 8712 | { |
72bf9492 | 8713 | switch (pdi->tag) |
c906108c SS |
8714 | { |
8715 | case DW_TAG_subprogram: | |
b1dc1806 | 8716 | case DW_TAG_inlined_subroutine: |
cdc07690 | 8717 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 8718 | break; |
72929c62 | 8719 | case DW_TAG_constant: |
c906108c SS |
8720 | case DW_TAG_variable: |
8721 | case DW_TAG_typedef: | |
91c24f0a | 8722 | case DW_TAG_union_type: |
72bf9492 | 8723 | if (!pdi->is_declaration) |
63d06c5c | 8724 | { |
72bf9492 | 8725 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
8726 | } |
8727 | break; | |
c906108c | 8728 | case DW_TAG_class_type: |
680b30c7 | 8729 | case DW_TAG_interface_type: |
c906108c | 8730 | case DW_TAG_structure_type: |
72bf9492 | 8731 | if (!pdi->is_declaration) |
c906108c | 8732 | { |
72bf9492 | 8733 | add_partial_symbol (pdi, cu); |
c906108c | 8734 | } |
b7fee5a3 KS |
8735 | if ((cu->language == language_rust |
8736 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
8737 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
8738 | set_addrmap, cu); | |
c906108c | 8739 | break; |
91c24f0a | 8740 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
8741 | if (!pdi->is_declaration) |
8742 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
8743 | break; |
8744 | case DW_TAG_base_type: | |
a02abb62 | 8745 | case DW_TAG_subrange_type: |
c906108c | 8746 | /* File scope base type definitions are added to the partial |
c5aa993b | 8747 | symbol table. */ |
72bf9492 | 8748 | add_partial_symbol (pdi, cu); |
c906108c | 8749 | break; |
d9fa45fe | 8750 | case DW_TAG_namespace: |
cdc07690 | 8751 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 8752 | break; |
5d7cb8df | 8753 | case DW_TAG_module: |
59c35742 AB |
8754 | if (!pdi->is_declaration) |
8755 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 8756 | break; |
95554aad TT |
8757 | case DW_TAG_imported_unit: |
8758 | { | |
8759 | struct dwarf2_per_cu_data *per_cu; | |
8760 | ||
f4dc4d17 DE |
8761 | /* For now we don't handle imported units in type units. */ |
8762 | if (cu->per_cu->is_debug_types) | |
8763 | { | |
8764 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
8765 | " supported in type units [in module %s]"), | |
518817b3 | 8766 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
8767 | } |
8768 | ||
e3b94546 SM |
8769 | per_cu = dwarf2_find_containing_comp_unit |
8770 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8771 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8772 | |
8773 | /* Go read the partial unit, if needed. */ | |
8774 | if (per_cu->v.psymtab == NULL) | |
b93601f3 | 8775 | process_psymtab_comp_unit (per_cu, 1, cu->language); |
95554aad | 8776 | |
ae640021 | 8777 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
8778 | } |
8779 | break; | |
74921315 KS |
8780 | case DW_TAG_imported_declaration: |
8781 | add_partial_symbol (pdi, cu); | |
8782 | break; | |
c906108c SS |
8783 | default: |
8784 | break; | |
8785 | } | |
8786 | } | |
8787 | ||
72bf9492 DJ |
8788 | /* If the die has a sibling, skip to the sibling. */ |
8789 | ||
8790 | pdi = pdi->die_sibling; | |
8791 | } | |
8792 | } | |
8793 | ||
8794 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8795 | |
72bf9492 | 8796 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8797 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8798 | Enumerators are an exception; they use the scope of their parent |
8799 | enumeration type, i.e. the name of the enumeration type is not | |
8800 | prepended to the enumerator. | |
91c24f0a | 8801 | |
72bf9492 DJ |
8802 | There are two complexities. One is DW_AT_specification; in this |
8803 | case "parent" means the parent of the target of the specification, | |
8804 | instead of the direct parent of the DIE. The other is compilers | |
8805 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8806 | the fully qualified name of structure types from their members' | |
8807 | linkage names. This must be done using the DIE's children rather | |
8808 | than the children of any DW_AT_specification target. We only need | |
8809 | to do this for structures at the top level, i.e. if the target of | |
8810 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8811 | have a parent. */ | |
8812 | ||
8813 | /* Compute the scope prefix associated with PDI's parent, in | |
8814 | compilation unit CU. The result will be allocated on CU's | |
8815 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8816 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8817 | static const char * |
72bf9492 DJ |
8818 | partial_die_parent_scope (struct partial_die_info *pdi, |
8819 | struct dwarf2_cu *cu) | |
8820 | { | |
15d034d0 | 8821 | const char *grandparent_scope; |
72bf9492 | 8822 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8823 | |
72bf9492 DJ |
8824 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8825 | then this means the parent of the specification DIE. */ | |
8826 | ||
8827 | real_pdi = pdi; | |
72bf9492 | 8828 | while (real_pdi->has_specification) |
fb816e8b | 8829 | { |
122cf0f2 AB |
8830 | auto res = find_partial_die (real_pdi->spec_offset, |
8831 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8832 | real_pdi = res.pdi; |
8833 | cu = res.cu; | |
8834 | } | |
72bf9492 DJ |
8835 | |
8836 | parent = real_pdi->die_parent; | |
8837 | if (parent == NULL) | |
8838 | return NULL; | |
8839 | ||
8840 | if (parent->scope_set) | |
8841 | return parent->scope; | |
8842 | ||
52356b79 | 8843 | parent->fixup (cu); |
72bf9492 | 8844 | |
10b3939b | 8845 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8846 | |
acebe513 UW |
8847 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8848 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8849 | Work around this problem here. */ | |
8850 | if (cu->language == language_cplus | |
6e70227d | 8851 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8852 | && strcmp (parent->name, "::") == 0 |
8853 | && grandparent_scope == NULL) | |
8854 | { | |
8855 | parent->scope = NULL; | |
8856 | parent->scope_set = 1; | |
8857 | return NULL; | |
8858 | } | |
8859 | ||
0a4b0913 | 8860 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
8861 | if (pdi->tag == DW_TAG_enumerator) |
8862 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8863 | parent->scope = grandparent_scope; | |
8864 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8865 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8866 | || parent->tag == DW_TAG_structure_type |
8867 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8868 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 8869 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
8870 | || parent->tag == DW_TAG_enumeration_type |
8871 | || (cu->language == language_fortran | |
8872 | && parent->tag == DW_TAG_subprogram | |
8873 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
8874 | { |
8875 | if (grandparent_scope == NULL) | |
8876 | parent->scope = parent->name; | |
8877 | else | |
3e43a32a MS |
8878 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8879 | grandparent_scope, | |
f55ee35c | 8880 | parent->name, 0, cu); |
72bf9492 | 8881 | } |
72bf9492 DJ |
8882 | else |
8883 | { | |
8884 | /* FIXME drow/2004-04-01: What should we be doing with | |
8885 | function-local names? For partial symbols, we should probably be | |
8886 | ignoring them. */ | |
fa9c3fa0 TT |
8887 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8888 | dwarf_tag_name (parent->tag), | |
8889 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8890 | parent->scope = grandparent_scope; |
c906108c SS |
8891 | } |
8892 | ||
72bf9492 DJ |
8893 | parent->scope_set = 1; |
8894 | return parent->scope; | |
8895 | } | |
8896 | ||
8897 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8898 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8899 | |
43816ebc | 8900 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
8901 | partial_die_full_name (struct partial_die_info *pdi, |
8902 | struct dwarf2_cu *cu) | |
8903 | { | |
15d034d0 | 8904 | const char *parent_scope; |
72bf9492 | 8905 | |
98bfdba5 PA |
8906 | /* If this is a template instantiation, we can not work out the |
8907 | template arguments from partial DIEs. So, unfortunately, we have | |
8908 | to go through the full DIEs. At least any work we do building | |
8909 | types here will be reused if full symbols are loaded later. */ | |
8910 | if (pdi->has_template_arguments) | |
8911 | { | |
52356b79 | 8912 | pdi->fixup (cu); |
98bfdba5 PA |
8913 | |
8914 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8915 | { | |
8916 | struct die_info *die; | |
8917 | struct attribute attr; | |
8918 | struct dwarf2_cu *ref_cu = cu; | |
8919 | ||
b64f50a1 | 8920 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8921 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8922 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8923 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8924 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8925 | ||
43816ebc | 8926 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
8927 | } |
8928 | } | |
8929 | ||
72bf9492 DJ |
8930 | parent_scope = partial_die_parent_scope (pdi, cu); |
8931 | if (parent_scope == NULL) | |
8932 | return NULL; | |
8933 | else | |
43816ebc TT |
8934 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
8935 | pdi->name, 0, cu)); | |
c906108c SS |
8936 | } |
8937 | ||
8938 | static void | |
72bf9492 | 8939 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8940 | { |
518817b3 SM |
8941 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8942 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8943 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8944 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8945 | CORE_ADDR addr = 0; |
15d034d0 | 8946 | const char *actual_name = NULL; |
e142c38c DJ |
8947 | CORE_ADDR baseaddr; |
8948 | ||
6a053cb1 | 8949 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
c906108c | 8950 | |
43816ebc TT |
8951 | gdb::unique_xmalloc_ptr<char> built_actual_name |
8952 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 8953 | if (built_actual_name != NULL) |
43816ebc | 8954 | actual_name = built_actual_name.get (); |
63d06c5c | 8955 | |
72bf9492 DJ |
8956 | if (actual_name == NULL) |
8957 | actual_name = pdi->name; | |
8958 | ||
c906108c SS |
8959 | switch (pdi->tag) |
8960 | { | |
b1dc1806 | 8961 | case DW_TAG_inlined_subroutine: |
c906108c | 8962 | case DW_TAG_subprogram: |
79748972 TT |
8963 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8964 | - baseaddr); | |
0a4b0913 AB |
8965 | if (pdi->is_external |
8966 | || cu->language == language_ada | |
8967 | || (cu->language == language_fortran | |
8968 | && pdi->die_parent != NULL | |
8969 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
8970 | { | |
8971 | /* Normally, only "external" DIEs are part of the global scope. | |
8972 | But in Ada and Fortran, we want to be able to access nested | |
8973 | procedures globally. So all Ada and Fortran subprograms are | |
8974 | stored in the global scope. */ | |
31edb802 | 8975 | add_psymbol_to_list (actual_name, |
15d034d0 | 8976 | built_actual_name != NULL, |
f47fb265 | 8977 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8978 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8979 | psymbol_placement::GLOBAL, |
79748972 TT |
8980 | addr, |
8981 | cu->language, objfile); | |
c906108c SS |
8982 | } |
8983 | else | |
8984 | { | |
31edb802 | 8985 | add_psymbol_to_list (actual_name, |
15d034d0 | 8986 | built_actual_name != NULL, |
f47fb265 | 8987 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8988 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8989 | psymbol_placement::STATIC, |
1762568f | 8990 | addr, cu->language, objfile); |
c906108c | 8991 | } |
0c1b455e TT |
8992 | |
8993 | if (pdi->main_subprogram && actual_name != NULL) | |
8994 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8995 | break; |
72929c62 | 8996 | case DW_TAG_constant: |
31edb802 | 8997 | add_psymbol_to_list (actual_name, |
75aedd27 TT |
8998 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
8999 | -1, (pdi->is_external | |
9000 | ? psymbol_placement::GLOBAL | |
9001 | : psymbol_placement::STATIC), | |
9002 | 0, cu->language, objfile); | |
72929c62 | 9003 | break; |
c906108c | 9004 | case DW_TAG_variable: |
95554aad TT |
9005 | if (pdi->d.locdesc) |
9006 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 9007 | |
95554aad | 9008 | if (pdi->d.locdesc |
caac4577 JG |
9009 | && addr == 0 |
9010 | && !dwarf2_per_objfile->has_section_at_zero) | |
9011 | { | |
9012 | /* A global or static variable may also have been stripped | |
9013 | out by the linker if unused, in which case its address | |
9014 | will be nullified; do not add such variables into partial | |
9015 | symbol table then. */ | |
9016 | } | |
9017 | else if (pdi->is_external) | |
c906108c SS |
9018 | { |
9019 | /* Global Variable. | |
9020 | Don't enter into the minimal symbol tables as there is | |
9021 | a minimal symbol table entry from the ELF symbols already. | |
9022 | Enter into partial symbol table if it has a location | |
9023 | descriptor or a type. | |
9024 | If the location descriptor is missing, new_symbol will create | |
9025 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
9026 | be determined from the minimal symbol table whenever the variable | |
9027 | is referenced. | |
9028 | The address for the partial symbol table entry is not | |
9029 | used by GDB, but it comes in handy for debugging partial symbol | |
9030 | table building. */ | |
9031 | ||
95554aad | 9032 | if (pdi->d.locdesc || pdi->has_type) |
31edb802 | 9033 | add_psymbol_to_list (actual_name, |
15d034d0 | 9034 | built_actual_name != NULL, |
f47fb265 | 9035 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 9036 | SECT_OFF_TEXT (objfile), |
75aedd27 | 9037 | psymbol_placement::GLOBAL, |
79748972 | 9038 | addr, cu->language, objfile); |
c906108c SS |
9039 | } |
9040 | else | |
9041 | { | |
ff908ebf AW |
9042 | int has_loc = pdi->d.locdesc != NULL; |
9043 | ||
9044 | /* Static Variable. Skip symbols whose value we cannot know (those | |
9045 | without location descriptors or constant values). */ | |
9046 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 9047 | return; |
ff908ebf | 9048 | |
31edb802 | 9049 | add_psymbol_to_list (actual_name, |
15d034d0 | 9050 | built_actual_name != NULL, |
f47fb265 | 9051 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 9052 | SECT_OFF_TEXT (objfile), |
75aedd27 | 9053 | psymbol_placement::STATIC, |
79748972 | 9054 | has_loc ? addr : 0, |
f47fb265 | 9055 | cu->language, objfile); |
c906108c SS |
9056 | } |
9057 | break; | |
9058 | case DW_TAG_typedef: | |
9059 | case DW_TAG_base_type: | |
a02abb62 | 9060 | case DW_TAG_subrange_type: |
31edb802 | 9061 | add_psymbol_to_list (actual_name, |
15d034d0 | 9062 | built_actual_name != NULL, |
79748972 | 9063 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 9064 | psymbol_placement::STATIC, |
1762568f | 9065 | 0, cu->language, objfile); |
c906108c | 9066 | break; |
74921315 | 9067 | case DW_TAG_imported_declaration: |
72bf9492 | 9068 | case DW_TAG_namespace: |
31edb802 | 9069 | add_psymbol_to_list (actual_name, |
15d034d0 | 9070 | built_actual_name != NULL, |
79748972 | 9071 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 9072 | psymbol_placement::GLOBAL, |
1762568f | 9073 | 0, cu->language, objfile); |
72bf9492 | 9074 | break; |
530e8392 | 9075 | case DW_TAG_module: |
a5fd13a9 BH |
9076 | /* With Fortran 77 there might be a "BLOCK DATA" module |
9077 | available without any name. If so, we skip the module as it | |
9078 | doesn't bring any value. */ | |
9079 | if (actual_name != nullptr) | |
31edb802 | 9080 | add_psymbol_to_list (actual_name, |
a5fd13a9 BH |
9081 | built_actual_name != NULL, |
9082 | MODULE_DOMAIN, LOC_TYPEDEF, -1, | |
9083 | psymbol_placement::GLOBAL, | |
9084 | 0, cu->language, objfile); | |
530e8392 | 9085 | break; |
c906108c | 9086 | case DW_TAG_class_type: |
680b30c7 | 9087 | case DW_TAG_interface_type: |
c906108c SS |
9088 | case DW_TAG_structure_type: |
9089 | case DW_TAG_union_type: | |
9090 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
9091 | /* Skip external references. The DWARF standard says in the section |
9092 | about "Structure, Union, and Class Type Entries": "An incomplete | |
9093 | structure, union or class type is represented by a structure, | |
9094 | union or class entry that does not have a byte size attribute | |
9095 | and that has a DW_AT_declaration attribute." */ | |
9096 | if (!pdi->has_byte_size && pdi->is_declaration) | |
43816ebc | 9097 | return; |
fa4028e9 | 9098 | |
63d06c5c DC |
9099 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
9100 | static vs. global. */ | |
31edb802 | 9101 | add_psymbol_to_list (actual_name, |
15d034d0 | 9102 | built_actual_name != NULL, |
79748972 | 9103 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
9c37b5ae | 9104 | cu->language == language_cplus |
75aedd27 TT |
9105 | ? psymbol_placement::GLOBAL |
9106 | : psymbol_placement::STATIC, | |
1762568f | 9107 | 0, cu->language, objfile); |
c906108c | 9108 | |
c906108c SS |
9109 | break; |
9110 | case DW_TAG_enumerator: | |
31edb802 | 9111 | add_psymbol_to_list (actual_name, |
15d034d0 | 9112 | built_actual_name != NULL, |
79748972 | 9113 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 9114 | cu->language == language_cplus |
75aedd27 TT |
9115 | ? psymbol_placement::GLOBAL |
9116 | : psymbol_placement::STATIC, | |
1762568f | 9117 | 0, cu->language, objfile); |
c906108c SS |
9118 | break; |
9119 | default: | |
9120 | break; | |
9121 | } | |
9122 | } | |
9123 | ||
5c4e30ca DC |
9124 | /* Read a partial die corresponding to a namespace; also, add a symbol |
9125 | corresponding to that namespace to the symbol table. NAMESPACE is | |
9126 | the name of the enclosing namespace. */ | |
91c24f0a | 9127 | |
72bf9492 DJ |
9128 | static void |
9129 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 9130 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 9131 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 9132 | { |
72bf9492 | 9133 | /* Add a symbol for the namespace. */ |
e7c27a73 | 9134 | |
72bf9492 | 9135 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
9136 | |
9137 | /* Now scan partial symbols in that namespace. */ | |
9138 | ||
91c24f0a | 9139 | if (pdi->has_children) |
cdc07690 | 9140 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
9141 | } |
9142 | ||
5d7cb8df JK |
9143 | /* Read a partial die corresponding to a Fortran module. */ |
9144 | ||
9145 | static void | |
9146 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 9147 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 9148 | { |
530e8392 KB |
9149 | /* Add a symbol for the namespace. */ |
9150 | ||
9151 | add_partial_symbol (pdi, cu); | |
9152 | ||
f55ee35c | 9153 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
9154 | |
9155 | if (pdi->has_children) | |
cdc07690 | 9156 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
9157 | } |
9158 | ||
b1dc1806 XR |
9159 | /* Read a partial die corresponding to a subprogram or an inlined |
9160 | subprogram and create a partial symbol for that subprogram. | |
9161 | When the CU language allows it, this routine also defines a partial | |
9162 | symbol for each nested subprogram that this subprogram contains. | |
9163 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
9164 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 9165 | |
cdc07690 YQ |
9166 | PDI may also be a lexical block, in which case we simply search |
9167 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
9168 | Again, this is only performed when the CU language allows this |
9169 | type of definitions. */ | |
9170 | ||
9171 | static void | |
9172 | add_partial_subprogram (struct partial_die_info *pdi, | |
9173 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 9174 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 9175 | { |
b1dc1806 | 9176 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
9177 | { |
9178 | if (pdi->has_pc_info) | |
9179 | { | |
9180 | if (pdi->lowpc < *lowpc) | |
9181 | *lowpc = pdi->lowpc; | |
9182 | if (pdi->highpc > *highpc) | |
9183 | *highpc = pdi->highpc; | |
cdc07690 | 9184 | if (set_addrmap) |
5734ee8b | 9185 | { |
518817b3 | 9186 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
9187 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9188 | CORE_ADDR baseaddr; | |
b926417a TT |
9189 | CORE_ADDR this_highpc; |
9190 | CORE_ADDR this_lowpc; | |
5734ee8b | 9191 | |
6a053cb1 | 9192 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
b926417a TT |
9193 | this_lowpc |
9194 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
9195 | pdi->lowpc + baseaddr) | |
9196 | - baseaddr); | |
9197 | this_highpc | |
9198 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
9199 | pdi->highpc + baseaddr) | |
9200 | - baseaddr); | |
d320c2b5 | 9201 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 9202 | this_lowpc, this_highpc - 1, |
9291a0cd | 9203 | cu->per_cu->v.psymtab); |
5734ee8b | 9204 | } |
481860b3 GB |
9205 | } |
9206 | ||
9207 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
9208 | { | |
bc30ff58 | 9209 | if (!pdi->is_declaration) |
e8d05480 JB |
9210 | /* Ignore subprogram DIEs that do not have a name, they are |
9211 | illegal. Do not emit a complaint at this point, we will | |
9212 | do so when we convert this psymtab into a symtab. */ | |
9213 | if (pdi->name) | |
9214 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
9215 | } |
9216 | } | |
6e70227d | 9217 | |
bc30ff58 JB |
9218 | if (! pdi->has_children) |
9219 | return; | |
9220 | ||
0a4b0913 | 9221 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
9222 | { |
9223 | pdi = pdi->die_child; | |
9224 | while (pdi != NULL) | |
9225 | { | |
52356b79 | 9226 | pdi->fixup (cu); |
bc30ff58 | 9227 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 9228 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 9229 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 9230 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
9231 | pdi = pdi->die_sibling; |
9232 | } | |
9233 | } | |
9234 | } | |
9235 | ||
91c24f0a DC |
9236 | /* Read a partial die corresponding to an enumeration type. */ |
9237 | ||
72bf9492 DJ |
9238 | static void |
9239 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
9240 | struct dwarf2_cu *cu) | |
91c24f0a | 9241 | { |
72bf9492 | 9242 | struct partial_die_info *pdi; |
91c24f0a DC |
9243 | |
9244 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
9245 | add_partial_symbol (enum_pdi, cu); |
9246 | ||
9247 | pdi = enum_pdi->die_child; | |
9248 | while (pdi) | |
91c24f0a | 9249 | { |
72bf9492 | 9250 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 9251 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 9252 | else |
72bf9492 DJ |
9253 | add_partial_symbol (pdi, cu); |
9254 | pdi = pdi->die_sibling; | |
91c24f0a | 9255 | } |
91c24f0a DC |
9256 | } |
9257 | ||
6caca83c CC |
9258 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
9259 | ||
9260 | static unsigned int | |
d521ce57 | 9261 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
9262 | { |
9263 | unsigned int bytes_read; | |
9264 | ||
9265 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9266 | } | |
9267 | ||
685af9cd TT |
9268 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
9269 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
9270 | ||
4bb7a0a7 DJ |
9271 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
9272 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
9273 | the initial number. */ | |
9274 | ||
9275 | static struct abbrev_info * | |
685af9cd TT |
9276 | peek_die_abbrev (const die_reader_specs &reader, |
9277 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 9278 | { |
685af9cd | 9279 | dwarf2_cu *cu = reader.cu; |
518817b3 | 9280 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
9281 | unsigned int abbrev_number |
9282 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
9283 | |
9284 | if (abbrev_number == 0) | |
9285 | return NULL; | |
9286 | ||
685af9cd | 9287 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
9288 | if (!abbrev) |
9289 | { | |
422b9917 | 9290 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 9291 | " at offset %s [in module %s]"), |
422b9917 | 9292 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 9293 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
9294 | } |
9295 | ||
9296 | return abbrev; | |
9297 | } | |
9298 | ||
93311388 DE |
9299 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9300 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
9301 | DIE. Any children of the skipped DIEs will also be skipped. */ |
9302 | ||
d521ce57 TT |
9303 | static const gdb_byte * |
9304 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 9305 | { |
4bb7a0a7 DJ |
9306 | while (1) |
9307 | { | |
685af9cd TT |
9308 | unsigned int bytes_read; |
9309 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
9310 | ||
4bb7a0a7 DJ |
9311 | if (abbrev == NULL) |
9312 | return info_ptr + bytes_read; | |
9313 | else | |
dee91e82 | 9314 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
9315 | } |
9316 | } | |
9317 | ||
93311388 DE |
9318 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
9319 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
9320 | abbrev corresponding to that skipped uleb128 should be passed in |
9321 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
9322 | children. */ | |
9323 | ||
d521ce57 TT |
9324 | static const gdb_byte * |
9325 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 9326 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
9327 | { |
9328 | unsigned int bytes_read; | |
9329 | struct attribute attr; | |
dee91e82 DE |
9330 | bfd *abfd = reader->abfd; |
9331 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 9332 | const gdb_byte *buffer = reader->buffer; |
f664829e | 9333 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
9334 | unsigned int form, i; |
9335 | ||
9336 | for (i = 0; i < abbrev->num_attrs; i++) | |
9337 | { | |
9338 | /* The only abbrev we care about is DW_AT_sibling. */ | |
9339 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
9340 | { | |
dee91e82 | 9341 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 9342 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 9343 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 9344 | else |
b9502d3f | 9345 | { |
9c541725 PA |
9346 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
9347 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
9348 | |
9349 | if (sibling_ptr < info_ptr) | |
b98664d3 | 9350 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
9351 | else if (sibling_ptr > reader->buffer_end) |
9352 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f WN |
9353 | else |
9354 | return sibling_ptr; | |
9355 | } | |
4bb7a0a7 DJ |
9356 | } |
9357 | ||
9358 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
9359 | form = abbrev->attrs[i].form; | |
9360 | skip_attribute: | |
9361 | switch (form) | |
9362 | { | |
4bb7a0a7 | 9363 | case DW_FORM_ref_addr: |
ae411497 TT |
9364 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
9365 | and later it is offset sized. */ | |
9366 | if (cu->header.version == 2) | |
9367 | info_ptr += cu->header.addr_size; | |
9368 | else | |
9369 | info_ptr += cu->header.offset_size; | |
9370 | break; | |
36586728 TT |
9371 | case DW_FORM_GNU_ref_alt: |
9372 | info_ptr += cu->header.offset_size; | |
9373 | break; | |
ae411497 | 9374 | case DW_FORM_addr: |
4bb7a0a7 DJ |
9375 | info_ptr += cu->header.addr_size; |
9376 | break; | |
9377 | case DW_FORM_data1: | |
9378 | case DW_FORM_ref1: | |
9379 | case DW_FORM_flag: | |
8fe0f950 | 9380 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
9381 | info_ptr += 1; |
9382 | break; | |
2dc7f7b3 | 9383 | case DW_FORM_flag_present: |
43988095 | 9384 | case DW_FORM_implicit_const: |
2dc7f7b3 | 9385 | break; |
4bb7a0a7 DJ |
9386 | case DW_FORM_data2: |
9387 | case DW_FORM_ref2: | |
8fe0f950 | 9388 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
9389 | info_ptr += 2; |
9390 | break; | |
8fe0f950 AT |
9391 | case DW_FORM_strx3: |
9392 | info_ptr += 3; | |
9393 | break; | |
4bb7a0a7 DJ |
9394 | case DW_FORM_data4: |
9395 | case DW_FORM_ref4: | |
8fe0f950 | 9396 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
9397 | info_ptr += 4; |
9398 | break; | |
9399 | case DW_FORM_data8: | |
9400 | case DW_FORM_ref8: | |
55f1336d | 9401 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
9402 | info_ptr += 8; |
9403 | break; | |
0224619f JK |
9404 | case DW_FORM_data16: |
9405 | info_ptr += 16; | |
9406 | break; | |
4bb7a0a7 | 9407 | case DW_FORM_string: |
9b1c24c8 | 9408 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
9409 | info_ptr += bytes_read; |
9410 | break; | |
2dc7f7b3 | 9411 | case DW_FORM_sec_offset: |
4bb7a0a7 | 9412 | case DW_FORM_strp: |
36586728 | 9413 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
9414 | info_ptr += cu->header.offset_size; |
9415 | break; | |
2dc7f7b3 | 9416 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
9417 | case DW_FORM_block: |
9418 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9419 | info_ptr += bytes_read; | |
9420 | break; | |
9421 | case DW_FORM_block1: | |
9422 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
9423 | break; | |
9424 | case DW_FORM_block2: | |
9425 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
9426 | break; | |
9427 | case DW_FORM_block4: | |
9428 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
9429 | break; | |
336d760d | 9430 | case DW_FORM_addrx: |
cf532bd1 | 9431 | case DW_FORM_strx: |
4bb7a0a7 DJ |
9432 | case DW_FORM_sdata: |
9433 | case DW_FORM_udata: | |
9434 | case DW_FORM_ref_udata: | |
3019eac3 DE |
9435 | case DW_FORM_GNU_addr_index: |
9436 | case DW_FORM_GNU_str_index: | |
d521ce57 | 9437 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
9438 | break; |
9439 | case DW_FORM_indirect: | |
9440 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
9441 | info_ptr += bytes_read; | |
9442 | /* We need to continue parsing from here, so just go back to | |
9443 | the top. */ | |
9444 | goto skip_attribute; | |
9445 | ||
9446 | default: | |
3e43a32a MS |
9447 | error (_("Dwarf Error: Cannot handle %s " |
9448 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
9449 | dwarf_form_name (form), |
9450 | bfd_get_filename (abfd)); | |
9451 | } | |
9452 | } | |
9453 | ||
9454 | if (abbrev->has_children) | |
dee91e82 | 9455 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
9456 | else |
9457 | return info_ptr; | |
9458 | } | |
9459 | ||
93311388 | 9460 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 9461 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 9462 | |
d521ce57 | 9463 | static const gdb_byte * |
dee91e82 DE |
9464 | locate_pdi_sibling (const struct die_reader_specs *reader, |
9465 | struct partial_die_info *orig_pdi, | |
d521ce57 | 9466 | const gdb_byte *info_ptr) |
91c24f0a DC |
9467 | { |
9468 | /* Do we know the sibling already? */ | |
72bf9492 | 9469 | |
91c24f0a DC |
9470 | if (orig_pdi->sibling) |
9471 | return orig_pdi->sibling; | |
9472 | ||
9473 | /* Are there any children to deal with? */ | |
9474 | ||
9475 | if (!orig_pdi->has_children) | |
9476 | return info_ptr; | |
9477 | ||
4bb7a0a7 | 9478 | /* Skip the children the long way. */ |
91c24f0a | 9479 | |
dee91e82 | 9480 | return skip_children (reader, info_ptr); |
91c24f0a DC |
9481 | } |
9482 | ||
257e7a09 | 9483 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 9484 | not NULL. */ |
c906108c SS |
9485 | |
9486 | static void | |
257e7a09 YQ |
9487 | dwarf2_read_symtab (struct partial_symtab *self, |
9488 | struct objfile *objfile) | |
c906108c | 9489 | { |
ed2dc618 SM |
9490 | struct dwarf2_per_objfile *dwarf2_per_objfile |
9491 | = get_dwarf2_per_objfile (objfile); | |
9492 | ||
257e7a09 | 9493 | if (self->readin) |
c906108c | 9494 | { |
442e4d9c | 9495 | warning (_("bug: psymtab for %s is already read in."), |
257e7a09 | 9496 | self->filename); |
442e4d9c YQ |
9497 | } |
9498 | else | |
9499 | { | |
9500 | if (info_verbose) | |
c906108c | 9501 | { |
442e4d9c | 9502 | printf_filtered (_("Reading in symbols for %s..."), |
257e7a09 | 9503 | self->filename); |
442e4d9c | 9504 | gdb_flush (gdb_stdout); |
c906108c | 9505 | } |
c906108c | 9506 | |
442e4d9c YQ |
9507 | /* If this psymtab is constructed from a debug-only objfile, the |
9508 | has_section_at_zero flag will not necessarily be correct. We | |
9509 | can get the correct value for this flag by looking at the data | |
9510 | associated with the (presumably stripped) associated objfile. */ | |
9511 | if (objfile->separate_debug_objfile_backlink) | |
9512 | { | |
9513 | struct dwarf2_per_objfile *dpo_backlink | |
ed2dc618 | 9514 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
9a619af0 | 9515 | |
442e4d9c YQ |
9516 | dwarf2_per_objfile->has_section_at_zero |
9517 | = dpo_backlink->has_section_at_zero; | |
9518 | } | |
b2ab525c | 9519 | |
442e4d9c | 9520 | dwarf2_per_objfile->reading_partial_symbols = 0; |
98bfdba5 | 9521 | |
257e7a09 | 9522 | psymtab_to_symtab_1 (self); |
c906108c | 9523 | |
442e4d9c YQ |
9524 | /* Finish up the debug error message. */ |
9525 | if (info_verbose) | |
9526 | printf_filtered (_("done.\n")); | |
c906108c | 9527 | } |
95554aad | 9528 | |
ed2dc618 | 9529 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 9530 | } |
9cdd5dbd DE |
9531 | \f |
9532 | /* Reading in full CUs. */ | |
c906108c | 9533 | |
10b3939b DJ |
9534 | /* Add PER_CU to the queue. */ |
9535 | ||
9536 | static void | |
95554aad TT |
9537 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9538 | enum language pretend_language) | |
10b3939b DJ |
9539 | { |
9540 | struct dwarf2_queue_item *item; | |
9541 | ||
9542 | per_cu->queued = 1; | |
8d749320 | 9543 | item = XNEW (struct dwarf2_queue_item); |
10b3939b | 9544 | item->per_cu = per_cu; |
95554aad | 9545 | item->pretend_language = pretend_language; |
10b3939b DJ |
9546 | item->next = NULL; |
9547 | ||
9548 | if (dwarf2_queue == NULL) | |
9549 | dwarf2_queue = item; | |
9550 | else | |
9551 | dwarf2_queue_tail->next = item; | |
9552 | ||
9553 | dwarf2_queue_tail = item; | |
9554 | } | |
9555 | ||
89e63ee4 DE |
9556 | /* If PER_CU is not yet queued, add it to the queue. |
9557 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
9558 | dependency. | |
0907af0c | 9559 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
9560 | meaning either PER_CU is already queued or it is already loaded. |
9561 | ||
9562 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
9563 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
9564 | |
9565 | static int | |
89e63ee4 | 9566 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
9567 | struct dwarf2_per_cu_data *per_cu, |
9568 | enum language pretend_language) | |
9569 | { | |
9570 | /* We may arrive here during partial symbol reading, if we need full | |
9571 | DIEs to process an unusual case (e.g. template arguments). Do | |
9572 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 9573 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
9574 | { |
9575 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
9576 | return 1; | |
9577 | return 0; | |
9578 | } | |
9579 | ||
9580 | /* Mark the dependence relation so that we don't flush PER_CU | |
9581 | too early. */ | |
89e63ee4 DE |
9582 | if (dependent_cu != NULL) |
9583 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
9584 | |
9585 | /* If it's already on the queue, we have nothing to do. */ | |
9586 | if (per_cu->queued) | |
9587 | return 0; | |
9588 | ||
9589 | /* If the compilation unit is already loaded, just mark it as | |
9590 | used. */ | |
9591 | if (per_cu->cu != NULL) | |
9592 | { | |
9593 | per_cu->cu->last_used = 0; | |
9594 | return 0; | |
9595 | } | |
9596 | ||
9597 | /* Add it to the queue. */ | |
9598 | queue_comp_unit (per_cu, pretend_language); | |
9599 | ||
9600 | return 1; | |
9601 | } | |
9602 | ||
10b3939b DJ |
9603 | /* Process the queue. */ |
9604 | ||
9605 | static void | |
ed2dc618 | 9606 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b DJ |
9607 | { |
9608 | struct dwarf2_queue_item *item, *next_item; | |
9609 | ||
b4f54984 | 9610 | if (dwarf_read_debug) |
45cfd468 DE |
9611 | { |
9612 | fprintf_unfiltered (gdb_stdlog, | |
9613 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 9614 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
9615 | } |
9616 | ||
03dd20cc DJ |
9617 | /* The queue starts out with one item, but following a DIE reference |
9618 | may load a new CU, adding it to the end of the queue. */ | |
10b3939b DJ |
9619 | for (item = dwarf2_queue; item != NULL; dwarf2_queue = item = next_item) |
9620 | { | |
cc12ce38 DE |
9621 | if ((dwarf2_per_objfile->using_index |
9622 | ? !item->per_cu->v.quick->compunit_symtab | |
9623 | : (item->per_cu->v.psymtab && !item->per_cu->v.psymtab->readin)) | |
9624 | /* Skip dummy CUs. */ | |
9625 | && item->per_cu->cu != NULL) | |
f4dc4d17 DE |
9626 | { |
9627 | struct dwarf2_per_cu_data *per_cu = item->per_cu; | |
73be47f5 | 9628 | unsigned int debug_print_threshold; |
247f5c4f | 9629 | char buf[100]; |
f4dc4d17 | 9630 | |
247f5c4f | 9631 | if (per_cu->is_debug_types) |
f4dc4d17 | 9632 | { |
247f5c4f DE |
9633 | struct signatured_type *sig_type = |
9634 | (struct signatured_type *) per_cu; | |
9635 | ||
9d8780f0 | 9636 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 9637 | hex_string (sig_type->signature), |
9d8780f0 | 9638 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
9639 | /* There can be 100s of TUs. |
9640 | Only print them in verbose mode. */ | |
9641 | debug_print_threshold = 2; | |
f4dc4d17 | 9642 | } |
247f5c4f | 9643 | else |
73be47f5 | 9644 | { |
9d8780f0 SM |
9645 | sprintf (buf, "CU at offset %s", |
9646 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
9647 | debug_print_threshold = 1; |
9648 | } | |
247f5c4f | 9649 | |
b4f54984 | 9650 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9651 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
9652 | |
9653 | if (per_cu->is_debug_types) | |
9654 | process_full_type_unit (per_cu, item->pretend_language); | |
9655 | else | |
9656 | process_full_comp_unit (per_cu, item->pretend_language); | |
9657 | ||
b4f54984 | 9658 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 9659 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 9660 | } |
10b3939b DJ |
9661 | |
9662 | item->per_cu->queued = 0; | |
9663 | next_item = item->next; | |
9664 | xfree (item); | |
9665 | } | |
9666 | ||
9667 | dwarf2_queue_tail = NULL; | |
45cfd468 | 9668 | |
b4f54984 | 9669 | if (dwarf_read_debug) |
45cfd468 DE |
9670 | { |
9671 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 9672 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 9673 | } |
10b3939b DJ |
9674 | } |
9675 | ||
10b3939b DJ |
9676 | /* Read in full symbols for PST, and anything it depends on. */ |
9677 | ||
c906108c | 9678 | static void |
fba45db2 | 9679 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 9680 | { |
10b3939b | 9681 | struct dwarf2_per_cu_data *per_cu; |
aaa75496 JB |
9682 | int i; |
9683 | ||
95554aad TT |
9684 | if (pst->readin) |
9685 | return; | |
9686 | ||
aaa75496 | 9687 | for (i = 0; i < pst->number_of_dependencies; i++) |
95554aad TT |
9688 | if (!pst->dependencies[i]->readin |
9689 | && pst->dependencies[i]->user == NULL) | |
aaa75496 JB |
9690 | { |
9691 | /* Inform about additional files that need to be read in. */ | |
9692 | if (info_verbose) | |
9693 | { | |
a3f17187 | 9694 | /* FIXME: i18n: Need to make this a single string. */ |
aaa75496 JB |
9695 | fputs_filtered (" ", gdb_stdout); |
9696 | wrap_here (""); | |
9697 | fputs_filtered ("and ", gdb_stdout); | |
9698 | wrap_here (""); | |
9699 | printf_filtered ("%s...", pst->dependencies[i]->filename); | |
0963b4bd | 9700 | wrap_here (""); /* Flush output. */ |
aaa75496 JB |
9701 | gdb_flush (gdb_stdout); |
9702 | } | |
9703 | psymtab_to_symtab_1 (pst->dependencies[i]); | |
9704 | } | |
9705 | ||
9a3c8263 | 9706 | per_cu = (struct dwarf2_per_cu_data *) pst->read_symtab_private; |
10b3939b DJ |
9707 | |
9708 | if (per_cu == NULL) | |
aaa75496 JB |
9709 | { |
9710 | /* It's an include file, no symbols to read for it. | |
9711 | Everything is in the parent symtab. */ | |
9712 | pst->readin = 1; | |
9713 | return; | |
9714 | } | |
c906108c | 9715 | |
58f0c718 | 9716 | dw2_do_instantiate_symtab (per_cu, false); |
10b3939b DJ |
9717 | } |
9718 | ||
dee91e82 DE |
9719 | /* Trivial hash function for die_info: the hash value of a DIE |
9720 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 9721 | |
dee91e82 DE |
9722 | static hashval_t |
9723 | die_hash (const void *item) | |
10b3939b | 9724 | { |
9a3c8263 | 9725 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 9726 | |
9c541725 | 9727 | return to_underlying (die->sect_off); |
dee91e82 | 9728 | } |
63d06c5c | 9729 | |
dee91e82 DE |
9730 | /* Trivial comparison function for die_info structures: two DIEs |
9731 | are equal if they have the same offset. */ | |
98bfdba5 | 9732 | |
dee91e82 DE |
9733 | static int |
9734 | die_eq (const void *item_lhs, const void *item_rhs) | |
9735 | { | |
9a3c8263 SM |
9736 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
9737 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 9738 | |
9c541725 | 9739 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 9740 | } |
c906108c | 9741 | |
dee91e82 DE |
9742 | /* die_reader_func for load_full_comp_unit. |
9743 | This is identical to read_signatured_type_reader, | |
9744 | but is kept separate for now. */ | |
c906108c | 9745 | |
dee91e82 DE |
9746 | static void |
9747 | load_full_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 9748 | const gdb_byte *info_ptr, |
dee91e82 DE |
9749 | struct die_info *comp_unit_die, |
9750 | int has_children, | |
9751 | void *data) | |
9752 | { | |
9753 | struct dwarf2_cu *cu = reader->cu; | |
9a3c8263 | 9754 | enum language *language_ptr = (enum language *) data; |
6caca83c | 9755 | |
dee91e82 DE |
9756 | gdb_assert (cu->die_hash == NULL); |
9757 | cu->die_hash = | |
9758 | htab_create_alloc_ex (cu->header.length / 12, | |
9759 | die_hash, | |
9760 | die_eq, | |
9761 | NULL, | |
9762 | &cu->comp_unit_obstack, | |
9763 | hashtab_obstack_allocate, | |
9764 | dummy_obstack_deallocate); | |
e142c38c | 9765 | |
dee91e82 DE |
9766 | if (has_children) |
9767 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
9768 | &info_ptr, comp_unit_die); | |
9769 | cu->dies = comp_unit_die; | |
9770 | /* comp_unit_die is not stored in die_hash, no need. */ | |
10b3939b DJ |
9771 | |
9772 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 9773 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 9774 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
9775 | or we won't be able to build types correctly. |
9776 | Similarly, if we do not read the producer, we can not apply | |
9777 | producer-specific interpretation. */ | |
95554aad | 9778 | prepare_one_comp_unit (cu, cu->dies, *language_ptr); |
dee91e82 | 9779 | } |
10b3939b | 9780 | |
dee91e82 | 9781 | /* Load the DIEs associated with PER_CU into memory. */ |
a6c727b2 | 9782 | |
dee91e82 | 9783 | static void |
95554aad | 9784 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
58f0c718 | 9785 | bool skip_partial, |
95554aad | 9786 | enum language pretend_language) |
dee91e82 | 9787 | { |
3019eac3 | 9788 | gdb_assert (! this_cu->is_debug_types); |
c5b7e1cb | 9789 | |
58f0c718 | 9790 | init_cutu_and_read_dies (this_cu, NULL, 1, 1, skip_partial, |
f4dc4d17 | 9791 | load_full_comp_unit_reader, &pretend_language); |
10b3939b DJ |
9792 | } |
9793 | ||
3da10d80 KS |
9794 | /* Add a DIE to the delayed physname list. */ |
9795 | ||
9796 | static void | |
9797 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
9798 | const char *name, struct die_info *die, | |
9799 | struct dwarf2_cu *cu) | |
9800 | { | |
9801 | struct delayed_method_info mi; | |
9802 | mi.type = type; | |
9803 | mi.fnfield_index = fnfield_index; | |
9804 | mi.index = index; | |
9805 | mi.name = name; | |
9806 | mi.die = die; | |
c89b44cd | 9807 | cu->method_list.push_back (mi); |
3da10d80 KS |
9808 | } |
9809 | ||
3693fdb3 PA |
9810 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
9811 | "const" / "volatile". If so, decrements LEN by the length of the | |
9812 | modifier and return true. Otherwise return false. */ | |
9813 | ||
9814 | template<size_t N> | |
9815 | static bool | |
9816 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
9817 | { | |
9818 | size_t mod_len = sizeof (mod) - 1; | |
9819 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
9820 | { | |
9821 | len -= mod_len; | |
9822 | return true; | |
9823 | } | |
9824 | return false; | |
9825 | } | |
9826 | ||
3da10d80 KS |
9827 | /* Compute the physnames of any methods on the CU's method list. |
9828 | ||
9829 | The computation of method physnames is delayed in order to avoid the | |
9830 | (bad) condition that one of the method's formal parameters is of an as yet | |
9831 | incomplete type. */ | |
9832 | ||
9833 | static void | |
9834 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
9835 | { | |
3693fdb3 | 9836 | /* Only C++ delays computing physnames. */ |
c89b44cd | 9837 | if (cu->method_list.empty ()) |
3693fdb3 PA |
9838 | return; |
9839 | gdb_assert (cu->language == language_cplus); | |
9840 | ||
52941706 | 9841 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9842 | { |
1d06ead6 | 9843 | const char *physname; |
3da10d80 | 9844 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9845 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9846 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9847 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9848 | = physname ? physname : ""; |
3693fdb3 PA |
9849 | |
9850 | /* Since there's no tag to indicate whether a method is a | |
9851 | const/volatile overload, extract that information out of the | |
9852 | demangled name. */ | |
9853 | if (physname != NULL) | |
9854 | { | |
9855 | size_t len = strlen (physname); | |
9856 | ||
9857 | while (1) | |
9858 | { | |
9859 | if (physname[len] == ')') /* shortcut */ | |
9860 | break; | |
9861 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9862 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9863 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9864 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9865 | else |
9866 | break; | |
9867 | } | |
9868 | } | |
3da10d80 | 9869 | } |
c89b44cd TT |
9870 | |
9871 | /* The list is no longer needed. */ | |
9872 | cu->method_list.clear (); | |
3da10d80 KS |
9873 | } |
9874 | ||
a766d390 DE |
9875 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9876 | and it's not clear if/how imported objects will appear. | |
9877 | To keep Go support simple until that's worked out, | |
9878 | go back through what we've read and create something usable. | |
9879 | We could do this while processing each DIE, and feels kinda cleaner, | |
9880 | but that way is more invasive. | |
9881 | This is to, for example, allow the user to type "p var" or "b main" | |
9882 | without having to specify the package name, and allow lookups | |
9883 | of module.object to work in contexts that use the expression | |
9884 | parser. */ | |
9885 | ||
9886 | static void | |
9887 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9888 | { | |
421d1616 | 9889 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
9890 | struct pending *list; |
9891 | int i; | |
9892 | ||
c24bdb02 | 9893 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9894 | list != NULL; |
9895 | list = list->next) | |
a766d390 DE |
9896 | { |
9897 | for (i = 0; i < list->nsyms; ++i) | |
9898 | { | |
9899 | struct symbol *sym = list->symbol[i]; | |
9900 | ||
c1b5c1eb | 9901 | if (sym->language () == language_go |
a766d390 DE |
9902 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
9903 | { | |
421d1616 TT |
9904 | gdb::unique_xmalloc_ptr<char> this_package_name |
9905 | (go_symbol_package_name (sym)); | |
a766d390 DE |
9906 | |
9907 | if (this_package_name == NULL) | |
9908 | continue; | |
9909 | if (package_name == NULL) | |
421d1616 | 9910 | package_name = std::move (this_package_name); |
a766d390 DE |
9911 | else |
9912 | { | |
518817b3 SM |
9913 | struct objfile *objfile |
9914 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
421d1616 | 9915 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 9916 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9917 | (symbol_symtab (sym) != NULL |
9918 | ? symtab_to_filename_for_display | |
9919 | (symbol_symtab (sym)) | |
e3b94546 | 9920 | : objfile_name (objfile)), |
421d1616 | 9921 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
9922 | } |
9923 | } | |
9924 | } | |
9925 | } | |
9926 | ||
9927 | if (package_name != NULL) | |
9928 | { | |
518817b3 | 9929 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
34a68019 | 9930 | const char *saved_package_name |
421d1616 | 9931 | = obstack_strdup (&objfile->per_bfd->storage_obstack, package_name.get ()); |
19f392bc UW |
9932 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9933 | saved_package_name); | |
a766d390 DE |
9934 | struct symbol *sym; |
9935 | ||
e623cf5d | 9936 | sym = allocate_symbol (objfile); |
d3ecddab | 9937 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 9938 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
9939 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9940 | e.g., "main" finds the "main" module and not C's main(). */ | |
9941 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9942 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9943 | SYMBOL_TYPE (sym) = type; |
9944 | ||
c24bdb02 | 9945 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9946 | } |
9947 | } | |
9948 | ||
c9317f21 TT |
9949 | /* Allocate a fully-qualified name consisting of the two parts on the |
9950 | obstack. */ | |
9951 | ||
9952 | static const char * | |
9953 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9954 | { | |
9955 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9956 | } | |
9957 | ||
9958 | /* A helper that allocates a struct discriminant_info to attach to a | |
9959 | union type. */ | |
9960 | ||
9961 | static struct discriminant_info * | |
9962 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9963 | int default_index) | |
9964 | { | |
9965 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9966 | gdb_assert (discriminant_index == -1 |
9967 | || (discriminant_index >= 0 | |
9968 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9969 | gdb_assert (default_index == -1 |
c7b15a66 | 9970 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9971 | |
9972 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9973 | ||
9974 | struct discriminant_info *disc | |
9975 | = ((struct discriminant_info *) | |
9976 | TYPE_ZALLOC (type, | |
9977 | offsetof (struct discriminant_info, discriminants) | |
9978 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9979 | disc->default_index = default_index; | |
9980 | disc->discriminant_index = discriminant_index; | |
9981 | ||
9982 | struct dynamic_prop prop; | |
9983 | prop.kind = PROP_UNDEFINED; | |
9984 | prop.data.baton = disc; | |
9985 | ||
9986 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9987 | ||
9988 | return disc; | |
9989 | } | |
9990 | ||
9991 | /* Some versions of rustc emitted enums in an unusual way. | |
9992 | ||
9993 | Ordinary enums were emitted as unions. The first element of each | |
9994 | structure in the union was named "RUST$ENUM$DISR". This element | |
9995 | held the discriminant. | |
9996 | ||
9997 | These versions of Rust also implemented the "non-zero" | |
9998 | optimization. When the enum had two values, and one is empty and | |
9999 | the other holds a pointer that cannot be zero, the pointer is used | |
10000 | as the discriminant, with a zero value meaning the empty variant. | |
10001 | Here, the union's first member is of the form | |
10002 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
10003 | where the fieldnos are the indices of the fields that should be | |
10004 | traversed in order to find the field (which may be several fields deep) | |
10005 | and the variantname is the name of the variant of the case when the | |
10006 | field is zero. | |
10007 | ||
10008 | This function recognizes whether TYPE is of one of these forms, | |
10009 | and, if so, smashes it to be a variant type. */ | |
10010 | ||
10011 | static void | |
10012 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
10013 | { | |
10014 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
10015 | ||
10016 | /* We don't need to deal with empty enums. */ | |
10017 | if (TYPE_NFIELDS (type) == 0) | |
10018 | return; | |
10019 | ||
10020 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
10021 | if (TYPE_NFIELDS (type) == 1 | |
10022 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
10023 | { | |
10024 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
10025 | ||
10026 | /* Decode the field name to find the offset of the | |
10027 | discriminant. */ | |
10028 | ULONGEST bit_offset = 0; | |
10029 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
10030 | while (name[0] >= '0' && name[0] <= '9') | |
10031 | { | |
10032 | char *tail; | |
10033 | unsigned long index = strtoul (name, &tail, 10); | |
10034 | name = tail; | |
10035 | if (*name != '$' | |
10036 | || index >= TYPE_NFIELDS (field_type) | |
10037 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
10038 | != FIELD_LOC_KIND_BITPOS)) | |
10039 | { | |
b98664d3 | 10040 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
10041 | "[in module %s]"), |
10042 | TYPE_FIELD_NAME (type, 0), | |
10043 | objfile_name (objfile)); | |
10044 | return; | |
10045 | } | |
10046 | ++name; | |
10047 | ||
10048 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
10049 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
10050 | } | |
10051 | ||
10052 | /* Make a union to hold the variants. */ | |
10053 | struct type *union_type = alloc_type (objfile); | |
10054 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10055 | TYPE_NFIELDS (union_type) = 3; | |
10056 | TYPE_FIELDS (union_type) | |
10057 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
10058 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10059 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10060 | |
10061 | /* Put the discriminant must at index 0. */ | |
10062 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
10063 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
10064 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
10065 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
10066 | ||
10067 | /* The order of fields doesn't really matter, so put the real | |
10068 | field at index 1 and the data-less field at index 2. */ | |
10069 | struct discriminant_info *disc | |
10070 | = alloc_discriminant_info (union_type, 0, 1); | |
10071 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
10072 | TYPE_FIELD_NAME (union_type, 1) | |
10073 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
10074 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
10075 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
10076 | TYPE_FIELD_NAME (union_type, 1)); | |
10077 | ||
10078 | const char *dataless_name | |
10079 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
10080 | name); | |
10081 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
10082 | dataless_name); | |
10083 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
10084 | /* NAME points into the original discriminant name, which | |
10085 | already has the correct lifetime. */ | |
10086 | TYPE_FIELD_NAME (union_type, 2) = name; | |
10087 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
10088 | disc->discriminants[2] = 0; | |
10089 | ||
10090 | /* Smash this type to be a structure type. We have to do this | |
10091 | because the type has already been recorded. */ | |
10092 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10093 | TYPE_NFIELDS (type) = 1; | |
10094 | TYPE_FIELDS (type) | |
10095 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
10096 | ||
10097 | /* Install the variant part. */ | |
10098 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10099 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10100 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10101 | } | |
77c2dba3 TT |
10102 | /* A union with a single anonymous field is probably an old-style |
10103 | univariant enum. */ | |
10104 | else if (TYPE_NFIELDS (type) == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) | |
c9317f21 | 10105 | { |
c9317f21 TT |
10106 | /* Smash this type to be a structure type. We have to do this |
10107 | because the type has already been recorded. */ | |
10108 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10109 | ||
10110 | /* Make a union to hold the variants. */ | |
10111 | struct type *union_type = alloc_type (objfile); | |
10112 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10113 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
10114 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10115 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10116 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
10117 | ||
10118 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
10119 | const char *variant_name | |
10120 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
10121 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
10122 | TYPE_NAME (field_type) | |
10123 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 10124 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
10125 | |
10126 | /* Install the union in the outer struct type. */ | |
10127 | TYPE_NFIELDS (type) = 1; | |
10128 | TYPE_FIELDS (type) | |
10129 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
10130 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10131 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10132 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10133 | ||
10134 | alloc_discriminant_info (union_type, -1, 0); | |
10135 | } | |
10136 | else | |
10137 | { | |
10138 | struct type *disr_type = nullptr; | |
10139 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
10140 | { | |
10141 | disr_type = TYPE_FIELD_TYPE (type, i); | |
10142 | ||
a037790e TT |
10143 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
10144 | { | |
10145 | /* All fields of a true enum will be structs. */ | |
10146 | return; | |
10147 | } | |
10148 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
10149 | { |
10150 | /* Could be data-less variant, so keep going. */ | |
a037790e | 10151 | disr_type = nullptr; |
c9317f21 TT |
10152 | } |
10153 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
10154 | "RUST$ENUM$DISR") != 0) | |
10155 | { | |
10156 | /* Not a Rust enum. */ | |
10157 | return; | |
10158 | } | |
10159 | else | |
10160 | { | |
10161 | /* Found one. */ | |
10162 | break; | |
10163 | } | |
10164 | } | |
10165 | ||
10166 | /* If we got here without a discriminant, then it's probably | |
10167 | just a union. */ | |
10168 | if (disr_type == nullptr) | |
10169 | return; | |
10170 | ||
10171 | /* Smash this type to be a structure type. We have to do this | |
10172 | because the type has already been recorded. */ | |
10173 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
10174 | ||
10175 | /* Make a union to hold the variants. */ | |
10176 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
10177 | struct type *union_type = alloc_type (objfile); | |
10178 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
10179 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
10180 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 10181 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
10182 | TYPE_FIELDS (union_type) |
10183 | = (struct field *) TYPE_ZALLOC (union_type, | |
10184 | (TYPE_NFIELDS (union_type) | |
10185 | * sizeof (struct field))); | |
10186 | ||
10187 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
10188 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
10189 | ||
10190 | /* Install the discriminant at index 0 in the union. */ | |
10191 | TYPE_FIELD (union_type, 0) = *disr_field; | |
10192 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
10193 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
10194 | ||
10195 | /* Install the union in the outer struct type. */ | |
10196 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
10197 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
10198 | TYPE_NFIELDS (type) = 1; | |
10199 | ||
10200 | /* Set the size and offset of the union type. */ | |
10201 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
10202 | ||
10203 | /* We need a way to find the correct discriminant given a | |
10204 | variant name. For convenience we build a map here. */ | |
10205 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
10206 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
10207 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
10208 | { | |
10209 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
10210 | { | |
10211 | const char *name | |
10212 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
10213 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
10214 | } | |
10215 | } | |
10216 | ||
10217 | int n_fields = TYPE_NFIELDS (union_type); | |
10218 | struct discriminant_info *disc | |
10219 | = alloc_discriminant_info (union_type, 0, -1); | |
10220 | /* Skip the discriminant here. */ | |
10221 | for (int i = 1; i < n_fields; ++i) | |
10222 | { | |
10223 | /* Find the final word in the name of this variant's type. | |
10224 | That name can be used to look up the correct | |
10225 | discriminant. */ | |
10226 | const char *variant_name | |
10227 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
10228 | i))); | |
10229 | ||
10230 | auto iter = discriminant_map.find (variant_name); | |
10231 | if (iter != discriminant_map.end ()) | |
10232 | disc->discriminants[i] = iter->second; | |
10233 | ||
bedda9ac | 10234 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 10235 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
10236 | if (TYPE_NFIELDS (sub_type) > 0) |
10237 | { | |
10238 | --TYPE_NFIELDS (sub_type); | |
10239 | ++TYPE_FIELDS (sub_type); | |
10240 | } | |
c9317f21 TT |
10241 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
10242 | TYPE_NAME (sub_type) | |
10243 | = rust_fully_qualify (&objfile->objfile_obstack, | |
10244 | TYPE_NAME (type), variant_name); | |
10245 | } | |
10246 | } | |
10247 | } | |
10248 | ||
10249 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
10250 | ||
10251 | static void | |
10252 | rust_union_quirks (struct dwarf2_cu *cu) | |
10253 | { | |
10254 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
10255 | for (type *type_ : cu->rust_unions) |
10256 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
10257 | /* We don't need this any more. */ |
10258 | cu->rust_unions.clear (); | |
c9317f21 TT |
10259 | } |
10260 | ||
95554aad TT |
10261 | /* Return the symtab for PER_CU. This works properly regardless of |
10262 | whether we're using the index or psymtabs. */ | |
10263 | ||
43f3e411 DE |
10264 | static struct compunit_symtab * |
10265 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 10266 | { |
ed2dc618 | 10267 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
10268 | ? per_cu->v.quick->compunit_symtab |
10269 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
10270 | } |
10271 | ||
10272 | /* A helper function for computing the list of all symbol tables | |
10273 | included by PER_CU. */ | |
10274 | ||
10275 | static void | |
4c39bc03 | 10276 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 10277 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 10278 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 10279 | struct compunit_symtab *immediate_parent) |
95554aad TT |
10280 | { |
10281 | void **slot; | |
43f3e411 | 10282 | struct compunit_symtab *cust; |
95554aad TT |
10283 | |
10284 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
10285 | if (*slot != NULL) | |
10286 | { | |
10287 | /* This inclusion and its children have been processed. */ | |
10288 | return; | |
10289 | } | |
10290 | ||
10291 | *slot = per_cu; | |
10292 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
10293 | cust = get_compunit_symtab (per_cu); |
10294 | if (cust != NULL) | |
ec94af83 DE |
10295 | { |
10296 | /* If this is a type unit only add its symbol table if we haven't | |
10297 | seen it yet (type unit per_cu's can share symtabs). */ | |
10298 | if (per_cu->is_debug_types) | |
10299 | { | |
43f3e411 | 10300 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
10301 | if (*slot == NULL) |
10302 | { | |
43f3e411 | 10303 | *slot = cust; |
4c39bc03 | 10304 | result->push_back (cust); |
43f3e411 DE |
10305 | if (cust->user == NULL) |
10306 | cust->user = immediate_parent; | |
ec94af83 DE |
10307 | } |
10308 | } | |
10309 | else | |
f9125b6c | 10310 | { |
4c39bc03 | 10311 | result->push_back (cust); |
43f3e411 DE |
10312 | if (cust->user == NULL) |
10313 | cust->user = immediate_parent; | |
f9125b6c | 10314 | } |
ec94af83 | 10315 | } |
95554aad | 10316 | |
ae640021 AB |
10317 | if (!per_cu->imported_symtabs_empty ()) |
10318 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
10319 | { | |
10320 | recursively_compute_inclusions (result, all_children, | |
10321 | all_type_symtabs, ptr, cust); | |
10322 | } | |
95554aad TT |
10323 | } |
10324 | ||
43f3e411 | 10325 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
10326 | PER_CU. */ |
10327 | ||
10328 | static void | |
43f3e411 | 10329 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 10330 | { |
f4dc4d17 DE |
10331 | gdb_assert (! per_cu->is_debug_types); |
10332 | ||
ae640021 | 10333 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 10334 | { |
ae640021 | 10335 | int len; |
4c39bc03 | 10336 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 10337 | htab_t all_children, all_type_symtabs; |
43f3e411 | 10338 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
10339 | |
10340 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 10341 | if (cust == NULL) |
95554aad TT |
10342 | return; |
10343 | ||
10344 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
10345 | NULL, xcalloc, xfree); | |
ec94af83 DE |
10346 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
10347 | NULL, xcalloc, xfree); | |
95554aad | 10348 | |
ae640021 | 10349 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 DE |
10350 | { |
10351 | recursively_compute_inclusions (&result_symtabs, all_children, | |
ae640021 | 10352 | all_type_symtabs, ptr, cust); |
ec94af83 | 10353 | } |
95554aad | 10354 | |
ec94af83 | 10355 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 10356 | len = result_symtabs.size (); |
43f3e411 | 10357 | cust->includes |
ed2dc618 | 10358 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 10359 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
10360 | memcpy (cust->includes, result_symtabs.data (), |
10361 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 10362 | cust->includes[len] = NULL; |
95554aad | 10363 | |
95554aad | 10364 | htab_delete (all_children); |
ec94af83 | 10365 | htab_delete (all_type_symtabs); |
95554aad TT |
10366 | } |
10367 | } | |
10368 | ||
10369 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
10370 | read. */ | |
10371 | ||
10372 | static void | |
ed2dc618 | 10373 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 10374 | { |
71b73764 | 10375 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
10376 | { |
10377 | if (! iter->is_debug_types) | |
43f3e411 | 10378 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 10379 | } |
95554aad | 10380 | |
c5d0225d | 10381 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
10382 | } |
10383 | ||
9cdd5dbd | 10384 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
10385 | already been loaded into memory. */ |
10386 | ||
10387 | static void | |
95554aad TT |
10388 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
10389 | enum language pretend_language) | |
10b3939b | 10390 | { |
10b3939b | 10391 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
10392 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10393 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 10394 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 10395 | CORE_ADDR lowpc, highpc; |
43f3e411 | 10396 | struct compunit_symtab *cust; |
10b3939b | 10397 | CORE_ADDR baseaddr; |
4359dff1 | 10398 | struct block *static_block; |
3e29f34a | 10399 | CORE_ADDR addr; |
10b3939b | 10400 | |
6a053cb1 | 10401 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
10b3939b | 10402 | |
c89b44cd TT |
10403 | /* Clear the list here in case something was left over. */ |
10404 | cu->method_list.clear (); | |
10b3939b | 10405 | |
95554aad TT |
10406 | cu->language = pretend_language; |
10407 | cu->language_defn = language_def (cu->language); | |
10408 | ||
c906108c | 10409 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 10410 | process_die (cu->dies, cu); |
c906108c | 10411 | |
a766d390 DE |
10412 | /* For now fudge the Go package. */ |
10413 | if (cu->language == language_go) | |
10414 | fixup_go_packaging (cu); | |
10415 | ||
5f48f8f3 | 10416 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
10417 | should be complete, and it should now be safe to compute all of the |
10418 | physnames. */ | |
10419 | compute_delayed_physnames (cu); | |
3da10d80 | 10420 | |
c9317f21 TT |
10421 | if (cu->language == language_rust) |
10422 | rust_union_quirks (cu); | |
10423 | ||
fae299cd DC |
10424 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
10425 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
10426 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 10427 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 10428 | |
3e29f34a | 10429 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 10430 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
10431 | |
10432 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
10433 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
10434 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
10435 | addrmap to help ensure it has an accurate map of pc values belonging to | |
10436 | this comp unit. */ | |
10437 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
10438 | ||
c24bdb02 | 10439 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
10440 | SECT_OFF_TEXT (objfile), |
10441 | 0); | |
c906108c | 10442 | |
43f3e411 | 10443 | if (cust != NULL) |
c906108c | 10444 | { |
df15bd07 | 10445 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 10446 | |
8be455d7 JK |
10447 | /* Set symtab language to language from DW_AT_language. If the |
10448 | compilation is from a C file generated by language preprocessors, do | |
10449 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 10450 | if (!(cu->language == language_c |
40e3ad0e | 10451 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 10452 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
10453 | |
10454 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
10455 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
10456 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
10457 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
10458 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
10459 | |
10460 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
10461 | needed, it would be wrong due to missing DW_AT_producer there. | |
10462 | ||
10463 | Still one can confuse GDB by using non-standard GCC compilation | |
10464 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 10465 | */ |
ab260dad | 10466 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 10467 | cust->locations_valid = 1; |
e0d00bc7 JK |
10468 | |
10469 | if (gcc_4_minor >= 5) | |
43f3e411 | 10470 | cust->epilogue_unwind_valid = 1; |
96408a79 | 10471 | |
43f3e411 | 10472 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 10473 | } |
9291a0cd TT |
10474 | |
10475 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10476 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
10477 | else |
10478 | { | |
10479 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10480 | pst->compunit_symtab = cust; |
9291a0cd TT |
10481 | pst->readin = 1; |
10482 | } | |
c906108c | 10483 | |
95554aad | 10484 | /* Push it for inclusion processing later. */ |
c5d0225d | 10485 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
10486 | |
10487 | /* Not needed any more. */ | |
c24bdb02 | 10488 | cu->reset_builder (); |
f4dc4d17 | 10489 | } |
45cfd468 | 10490 | |
f4dc4d17 DE |
10491 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
10492 | already been loaded into memory. */ | |
10493 | ||
10494 | static void | |
10495 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
10496 | enum language pretend_language) | |
10497 | { | |
10498 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
10499 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
10500 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 10501 | struct compunit_symtab *cust; |
0186c6a7 DE |
10502 | struct signatured_type *sig_type; |
10503 | ||
10504 | gdb_assert (per_cu->is_debug_types); | |
10505 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 10506 | |
c89b44cd TT |
10507 | /* Clear the list here in case something was left over. */ |
10508 | cu->method_list.clear (); | |
f4dc4d17 | 10509 | |
f4dc4d17 DE |
10510 | cu->language = pretend_language; |
10511 | cu->language_defn = language_def (cu->language); | |
10512 | ||
10513 | /* The symbol tables are set up in read_type_unit_scope. */ | |
10514 | process_die (cu->dies, cu); | |
10515 | ||
10516 | /* For now fudge the Go package. */ | |
10517 | if (cu->language == language_go) | |
10518 | fixup_go_packaging (cu); | |
10519 | ||
5f48f8f3 | 10520 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
10521 | should be complete, and it should now be safe to compute all of the |
10522 | physnames. */ | |
10523 | compute_delayed_physnames (cu); | |
f4dc4d17 | 10524 | |
c9317f21 TT |
10525 | if (cu->language == language_rust) |
10526 | rust_union_quirks (cu); | |
10527 | ||
f4dc4d17 DE |
10528 | /* TUs share symbol tables. |
10529 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
10530 | of it with end_expandable_symtab. Otherwise, complete the addition of |
10531 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 10532 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 10533 | { |
c24bdb02 KS |
10534 | buildsym_compunit *builder = cu->get_builder (); |
10535 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 10536 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 10537 | |
43f3e411 | 10538 | if (cust != NULL) |
f4dc4d17 DE |
10539 | { |
10540 | /* Set symtab language to language from DW_AT_language. If the | |
10541 | compilation is from a C file generated by language preprocessors, | |
10542 | do not set the language if it was already deduced by | |
10543 | start_subfile. */ | |
43f3e411 DE |
10544 | if (!(cu->language == language_c |
10545 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
10546 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
10547 | } |
10548 | } | |
10549 | else | |
10550 | { | |
c24bdb02 | 10551 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 10552 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
10553 | } |
10554 | ||
10555 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 10556 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
10557 | else |
10558 | { | |
10559 | struct partial_symtab *pst = per_cu->v.psymtab; | |
43f3e411 | 10560 | pst->compunit_symtab = cust; |
f4dc4d17 | 10561 | pst->readin = 1; |
45cfd468 | 10562 | } |
804d2729 TT |
10563 | |
10564 | /* Not needed any more. */ | |
c24bdb02 | 10565 | cu->reset_builder (); |
c906108c SS |
10566 | } |
10567 | ||
95554aad TT |
10568 | /* Process an imported unit DIE. */ |
10569 | ||
10570 | static void | |
10571 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
10572 | { | |
10573 | struct attribute *attr; | |
10574 | ||
f4dc4d17 DE |
10575 | /* For now we don't handle imported units in type units. */ |
10576 | if (cu->per_cu->is_debug_types) | |
10577 | { | |
10578 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
10579 | " supported in type units [in module %s]"), | |
518817b3 | 10580 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
10581 | } |
10582 | ||
95554aad TT |
10583 | attr = dwarf2_attr (die, DW_AT_import, cu); |
10584 | if (attr != NULL) | |
10585 | { | |
9c541725 PA |
10586 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
10587 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
10588 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 10589 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 10590 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 10591 | |
69d751e3 | 10592 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 10593 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 10594 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 10595 | |
ae640021 | 10596 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
10597 | } |
10598 | } | |
10599 | ||
4c8aa72d PA |
10600 | /* RAII object that represents a process_die scope: i.e., |
10601 | starts/finishes processing a DIE. */ | |
10602 | class process_die_scope | |
adde2bff | 10603 | { |
4c8aa72d PA |
10604 | public: |
10605 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
10606 | : m_die (die), m_cu (cu) | |
10607 | { | |
10608 | /* We should only be processing DIEs not already in process. */ | |
10609 | gdb_assert (!m_die->in_process); | |
10610 | m_die->in_process = true; | |
10611 | } | |
8c3cb9fa | 10612 | |
4c8aa72d PA |
10613 | ~process_die_scope () |
10614 | { | |
10615 | m_die->in_process = false; | |
10616 | ||
10617 | /* If we're done processing the DIE for the CU that owns the line | |
10618 | header, we don't need the line header anymore. */ | |
10619 | if (m_cu->line_header_die_owner == m_die) | |
10620 | { | |
10621 | delete m_cu->line_header; | |
10622 | m_cu->line_header = NULL; | |
10623 | m_cu->line_header_die_owner = NULL; | |
10624 | } | |
10625 | } | |
10626 | ||
10627 | private: | |
10628 | die_info *m_die; | |
10629 | dwarf2_cu *m_cu; | |
10630 | }; | |
adde2bff | 10631 | |
c906108c SS |
10632 | /* Process a die and its children. */ |
10633 | ||
10634 | static void | |
e7c27a73 | 10635 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10636 | { |
4c8aa72d | 10637 | process_die_scope scope (die, cu); |
adde2bff | 10638 | |
c906108c SS |
10639 | switch (die->tag) |
10640 | { | |
10641 | case DW_TAG_padding: | |
10642 | break; | |
10643 | case DW_TAG_compile_unit: | |
95554aad | 10644 | case DW_TAG_partial_unit: |
e7c27a73 | 10645 | read_file_scope (die, cu); |
c906108c | 10646 | break; |
348e048f DE |
10647 | case DW_TAG_type_unit: |
10648 | read_type_unit_scope (die, cu); | |
10649 | break; | |
c906108c | 10650 | case DW_TAG_subprogram: |
0a4b0913 AB |
10651 | /* Nested subprograms in Fortran get a prefix. */ |
10652 | if (cu->language == language_fortran | |
10653 | && die->parent != NULL | |
10654 | && die->parent->tag == DW_TAG_subprogram) | |
10655 | cu->processing_has_namespace_info = true; | |
10656 | /* Fall through. */ | |
c906108c | 10657 | case DW_TAG_inlined_subroutine: |
edb3359d | 10658 | read_func_scope (die, cu); |
c906108c SS |
10659 | break; |
10660 | case DW_TAG_lexical_block: | |
14898363 L |
10661 | case DW_TAG_try_block: |
10662 | case DW_TAG_catch_block: | |
e7c27a73 | 10663 | read_lexical_block_scope (die, cu); |
c906108c | 10664 | break; |
216f72a1 | 10665 | case DW_TAG_call_site: |
96408a79 SA |
10666 | case DW_TAG_GNU_call_site: |
10667 | read_call_site_scope (die, cu); | |
10668 | break; | |
c906108c | 10669 | case DW_TAG_class_type: |
680b30c7 | 10670 | case DW_TAG_interface_type: |
c906108c SS |
10671 | case DW_TAG_structure_type: |
10672 | case DW_TAG_union_type: | |
134d01f1 | 10673 | process_structure_scope (die, cu); |
c906108c SS |
10674 | break; |
10675 | case DW_TAG_enumeration_type: | |
134d01f1 | 10676 | process_enumeration_scope (die, cu); |
c906108c | 10677 | break; |
134d01f1 | 10678 | |
f792889a DJ |
10679 | /* These dies have a type, but processing them does not create |
10680 | a symbol or recurse to process the children. Therefore we can | |
10681 | read them on-demand through read_type_die. */ | |
c906108c | 10682 | case DW_TAG_subroutine_type: |
72019c9c | 10683 | case DW_TAG_set_type: |
c906108c | 10684 | case DW_TAG_array_type: |
c906108c | 10685 | case DW_TAG_pointer_type: |
c906108c | 10686 | case DW_TAG_ptr_to_member_type: |
c906108c | 10687 | case DW_TAG_reference_type: |
4297a3f0 | 10688 | case DW_TAG_rvalue_reference_type: |
c906108c | 10689 | case DW_TAG_string_type: |
c906108c | 10690 | break; |
134d01f1 | 10691 | |
c906108c | 10692 | case DW_TAG_base_type: |
a02abb62 | 10693 | case DW_TAG_subrange_type: |
cb249c71 | 10694 | case DW_TAG_typedef: |
134d01f1 DJ |
10695 | /* Add a typedef symbol for the type definition, if it has a |
10696 | DW_AT_name. */ | |
f792889a | 10697 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 10698 | break; |
c906108c | 10699 | case DW_TAG_common_block: |
e7c27a73 | 10700 | read_common_block (die, cu); |
c906108c SS |
10701 | break; |
10702 | case DW_TAG_common_inclusion: | |
10703 | break; | |
d9fa45fe | 10704 | case DW_TAG_namespace: |
9068261f | 10705 | cu->processing_has_namespace_info = true; |
e7c27a73 | 10706 | read_namespace (die, cu); |
d9fa45fe | 10707 | break; |
5d7cb8df | 10708 | case DW_TAG_module: |
9068261f | 10709 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
10710 | read_module (die, cu); |
10711 | break; | |
d9fa45fe | 10712 | case DW_TAG_imported_declaration: |
9068261f | 10713 | cu->processing_has_namespace_info = true; |
74921315 KS |
10714 | if (read_namespace_alias (die, cu)) |
10715 | break; | |
86a73007 TT |
10716 | /* The declaration is not a global namespace alias. */ |
10717 | /* Fall through. */ | |
d9fa45fe | 10718 | case DW_TAG_imported_module: |
9068261f | 10719 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
10720 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
10721 | || cu->language != language_fortran)) | |
b98664d3 | 10722 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
10723 | dwarf_tag_name (die->tag)); |
10724 | read_import_statement (die, cu); | |
d9fa45fe | 10725 | break; |
95554aad TT |
10726 | |
10727 | case DW_TAG_imported_unit: | |
10728 | process_imported_unit_die (die, cu); | |
10729 | break; | |
10730 | ||
71a3c369 TT |
10731 | case DW_TAG_variable: |
10732 | read_variable (die, cu); | |
10733 | break; | |
10734 | ||
c906108c | 10735 | default: |
e7c27a73 | 10736 | new_symbol (die, NULL, cu); |
c906108c SS |
10737 | break; |
10738 | } | |
10739 | } | |
ca69b9e6 DE |
10740 | \f |
10741 | /* DWARF name computation. */ | |
c906108c | 10742 | |
94af9270 KS |
10743 | /* A helper function for dwarf2_compute_name which determines whether DIE |
10744 | needs to have the name of the scope prepended to the name listed in the | |
10745 | die. */ | |
10746 | ||
10747 | static int | |
10748 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
10749 | { | |
1c809c68 TT |
10750 | struct attribute *attr; |
10751 | ||
94af9270 KS |
10752 | switch (die->tag) |
10753 | { | |
10754 | case DW_TAG_namespace: | |
10755 | case DW_TAG_typedef: | |
10756 | case DW_TAG_class_type: | |
10757 | case DW_TAG_interface_type: | |
10758 | case DW_TAG_structure_type: | |
10759 | case DW_TAG_union_type: | |
10760 | case DW_TAG_enumeration_type: | |
10761 | case DW_TAG_enumerator: | |
10762 | case DW_TAG_subprogram: | |
08a76f8a | 10763 | case DW_TAG_inlined_subroutine: |
94af9270 | 10764 | case DW_TAG_member: |
74921315 | 10765 | case DW_TAG_imported_declaration: |
94af9270 KS |
10766 | return 1; |
10767 | ||
10768 | case DW_TAG_variable: | |
c2b0a229 | 10769 | case DW_TAG_constant: |
94af9270 KS |
10770 | /* We only need to prefix "globally" visible variables. These include |
10771 | any variable marked with DW_AT_external or any variable that | |
10772 | lives in a namespace. [Variables in anonymous namespaces | |
10773 | require prefixing, but they are not DW_AT_external.] */ | |
10774 | ||
10775 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
10776 | { | |
10777 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 10778 | |
94af9270 KS |
10779 | return die_needs_namespace (die_specification (die, &spec_cu), |
10780 | spec_cu); | |
10781 | } | |
10782 | ||
1c809c68 | 10783 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
10784 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
10785 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
10786 | return 0; |
10787 | /* A variable in a lexical block of some kind does not need a | |
10788 | namespace, even though in C++ such variables may be external | |
10789 | and have a mangled name. */ | |
10790 | if (die->parent->tag == DW_TAG_lexical_block | |
10791 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
10792 | || die->parent->tag == DW_TAG_catch_block |
10793 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
10794 | return 0; |
10795 | return 1; | |
94af9270 KS |
10796 | |
10797 | default: | |
10798 | return 0; | |
10799 | } | |
10800 | } | |
10801 | ||
73b9be8b KS |
10802 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
10803 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10804 | defined for the given DIE. */ | |
10805 | ||
10806 | static struct attribute * | |
10807 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
10808 | { | |
10809 | struct attribute *attr; | |
10810 | ||
10811 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
10812 | if (attr == NULL) | |
10813 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10814 | ||
10815 | return attr; | |
10816 | } | |
10817 | ||
10818 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
10819 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
10820 | defined for the given DIE. */ | |
10821 | ||
10822 | static const char * | |
10823 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
10824 | { | |
10825 | const char *linkage_name; | |
10826 | ||
10827 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
10828 | if (linkage_name == NULL) | |
10829 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
10830 | ||
10831 | return linkage_name; | |
10832 | } | |
10833 | ||
94af9270 | 10834 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10835 | compute the physname for the object, which include a method's: |
9c37b5ae | 10836 | - formal parameters (C++), |
a766d390 | 10837 | - receiver type (Go), |
a766d390 DE |
10838 | |
10839 | The term "physname" is a bit confusing. | |
10840 | For C++, for example, it is the demangled name. | |
10841 | For Go, for example, it's the mangled name. | |
94af9270 | 10842 | |
af6b7be1 JB |
10843 | For Ada, return the DIE's linkage name rather than the fully qualified |
10844 | name. PHYSNAME is ignored.. | |
10845 | ||
94af9270 KS |
10846 | The result is allocated on the objfile_obstack and canonicalized. */ |
10847 | ||
10848 | static const char * | |
15d034d0 TT |
10849 | dwarf2_compute_name (const char *name, |
10850 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10851 | int physname) |
10852 | { | |
518817b3 | 10853 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10854 | |
94af9270 KS |
10855 | if (name == NULL) |
10856 | name = dwarf2_name (die, cu); | |
10857 | ||
2ee7123e DE |
10858 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10859 | but otherwise compute it by typename_concat inside GDB. | |
10860 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 10861 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 10862 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10863 | will set the demangled name to the result of dwarf2_full_name, and it is |
10864 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10865 | if (cu->language == language_ada |
10866 | || (cu->language == language_fortran && physname)) | |
10867 | { | |
10868 | /* For Ada unit, we prefer the linkage name over the name, as | |
10869 | the former contains the exported name, which the user expects | |
10870 | to be able to reference. Ideally, we want the user to be able | |
10871 | to reference this entity using either natural or linkage name, | |
10872 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10873 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10874 | |
2ee7123e DE |
10875 | if (linkage_name != NULL) |
10876 | return linkage_name; | |
f55ee35c JK |
10877 | } |
10878 | ||
94af9270 KS |
10879 | /* These are the only languages we know how to qualify names in. */ |
10880 | if (name != NULL | |
9c37b5ae | 10881 | && (cu->language == language_cplus |
c44af4eb TT |
10882 | || cu->language == language_fortran || cu->language == language_d |
10883 | || cu->language == language_rust)) | |
94af9270 KS |
10884 | { |
10885 | if (die_needs_namespace (die, cu)) | |
10886 | { | |
0d5cff50 | 10887 | const char *prefix; |
34a68019 | 10888 | const char *canonical_name = NULL; |
94af9270 | 10889 | |
d7e74731 PA |
10890 | string_file buf; |
10891 | ||
94af9270 | 10892 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10893 | if (*prefix != '\0') |
10894 | { | |
43816ebc TT |
10895 | gdb::unique_xmalloc_ptr<char> prefixed_name |
10896 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 10897 | |
43816ebc | 10898 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
10899 | } |
10900 | else | |
d7e74731 | 10901 | buf.puts (name); |
94af9270 | 10902 | |
98bfdba5 PA |
10903 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10904 | as children with DW_TAG_template_type_param or | |
10905 | DW_TAG_value_type_param. If the latter, add them to the name | |
10906 | here. If the name already has template parameters, then | |
10907 | skip this step; some versions of GCC emit both, and | |
10908 | it is more efficient to use the pre-computed name. | |
10909 | ||
10910 | Something to keep in mind about this process: it is very | |
10911 | unlikely, or in some cases downright impossible, to produce | |
10912 | something that will match the mangled name of a function. | |
10913 | If the definition of the function has the same debug info, | |
10914 | we should be able to match up with it anyway. But fallbacks | |
10915 | using the minimal symbol, for instance to find a method | |
10916 | implemented in a stripped copy of libstdc++, will not work. | |
10917 | If we do not have debug info for the definition, we will have to | |
10918 | match them up some other way. | |
10919 | ||
10920 | When we do name matching there is a related problem with function | |
10921 | templates; two instantiated function templates are allowed to | |
10922 | differ only by their return types, which we do not add here. */ | |
10923 | ||
10924 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10925 | { | |
10926 | struct attribute *attr; | |
10927 | struct die_info *child; | |
10928 | int first = 1; | |
10929 | ||
10930 | die->building_fullname = 1; | |
10931 | ||
10932 | for (child = die->child; child != NULL; child = child->sibling) | |
10933 | { | |
10934 | struct type *type; | |
12df843f | 10935 | LONGEST value; |
d521ce57 | 10936 | const gdb_byte *bytes; |
98bfdba5 PA |
10937 | struct dwarf2_locexpr_baton *baton; |
10938 | struct value *v; | |
10939 | ||
10940 | if (child->tag != DW_TAG_template_type_param | |
10941 | && child->tag != DW_TAG_template_value_param) | |
10942 | continue; | |
10943 | ||
10944 | if (first) | |
10945 | { | |
d7e74731 | 10946 | buf.puts ("<"); |
98bfdba5 PA |
10947 | first = 0; |
10948 | } | |
10949 | else | |
d7e74731 | 10950 | buf.puts (", "); |
98bfdba5 PA |
10951 | |
10952 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10953 | if (attr == NULL) | |
10954 | { | |
b98664d3 | 10955 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10956 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10957 | continue; |
10958 | } | |
10959 | type = die_type (child, cu); | |
10960 | ||
10961 | if (child->tag == DW_TAG_template_type_param) | |
10962 | { | |
c1ec8cea TT |
10963 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10964 | &type_print_raw_options); | |
98bfdba5 PA |
10965 | continue; |
10966 | } | |
10967 | ||
10968 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10969 | if (attr == NULL) | |
10970 | { | |
b98664d3 | 10971 | complaint (_("template parameter missing " |
3e43a32a | 10972 | "DW_AT_const_value")); |
d7e74731 | 10973 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10974 | continue; |
10975 | } | |
10976 | ||
10977 | dwarf2_const_value_attr (attr, type, name, | |
10978 | &cu->comp_unit_obstack, cu, | |
10979 | &value, &bytes, &baton); | |
10980 | ||
10981 | if (TYPE_NOSIGN (type)) | |
10982 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10983 | changed, this can use value_print instead. */ | |
d7e74731 | 10984 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10985 | else |
10986 | { | |
10987 | struct value_print_options opts; | |
10988 | ||
10989 | if (baton != NULL) | |
10990 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10991 | baton->data, | |
10992 | baton->size, | |
10993 | baton->per_cu); | |
10994 | else if (bytes != NULL) | |
10995 | { | |
10996 | v = allocate_value (type); | |
10997 | memcpy (value_contents_writeable (v), bytes, | |
10998 | TYPE_LENGTH (type)); | |
10999 | } | |
11000 | else | |
11001 | v = value_from_longest (type, value); | |
11002 | ||
3e43a32a MS |
11003 | /* Specify decimal so that we do not depend on |
11004 | the radix. */ | |
98bfdba5 PA |
11005 | get_formatted_print_options (&opts, 'd'); |
11006 | opts.raw = 1; | |
d7e74731 | 11007 | value_print (v, &buf, &opts); |
98bfdba5 | 11008 | release_value (v); |
98bfdba5 PA |
11009 | } |
11010 | } | |
11011 | ||
11012 | die->building_fullname = 0; | |
11013 | ||
11014 | if (!first) | |
11015 | { | |
11016 | /* Close the argument list, with a space if necessary | |
11017 | (nested templates). */ | |
d7e74731 PA |
11018 | if (!buf.empty () && buf.string ().back () == '>') |
11019 | buf.puts (" >"); | |
98bfdba5 | 11020 | else |
d7e74731 | 11021 | buf.puts (">"); |
98bfdba5 PA |
11022 | } |
11023 | } | |
11024 | ||
9c37b5ae | 11025 | /* For C++ methods, append formal parameter type |
94af9270 | 11026 | information, if PHYSNAME. */ |
6e70227d | 11027 | |
94af9270 | 11028 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 11029 | && cu->language == language_cplus) |
94af9270 KS |
11030 | { |
11031 | struct type *type = read_type_die (die, cu); | |
11032 | ||
d7e74731 | 11033 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 11034 | &type_print_raw_options); |
94af9270 | 11035 | |
9c37b5ae | 11036 | if (cu->language == language_cplus) |
94af9270 | 11037 | { |
60430eff DJ |
11038 | /* Assume that an artificial first parameter is |
11039 | "this", but do not crash if it is not. RealView | |
11040 | marks unnamed (and thus unused) parameters as | |
11041 | artificial; there is no way to differentiate | |
11042 | the two cases. */ | |
94af9270 KS |
11043 | if (TYPE_NFIELDS (type) > 0 |
11044 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 11045 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
11046 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
11047 | 0)))) | |
d7e74731 | 11048 | buf.puts (" const"); |
94af9270 KS |
11049 | } |
11050 | } | |
11051 | ||
d7e74731 | 11052 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
11053 | |
11054 | if (cu->language == language_cplus) | |
34a68019 | 11055 | canonical_name |
322a8516 | 11056 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
34a68019 TT |
11057 | &objfile->per_bfd->storage_obstack); |
11058 | ||
11059 | /* If we only computed INTERMEDIATE_NAME, or if | |
11060 | INTERMEDIATE_NAME is already canonical, then we need to | |
11061 | copy it to the appropriate obstack. */ | |
322a8516 | 11062 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
efba19b0 TT |
11063 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, |
11064 | intermediate_name); | |
34a68019 TT |
11065 | else |
11066 | name = canonical_name; | |
94af9270 KS |
11067 | } |
11068 | } | |
11069 | ||
11070 | return name; | |
11071 | } | |
11072 | ||
0114d602 DJ |
11073 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
11074 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 11075 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
11076 | not have a name. NAME may either be from a previous call to |
11077 | dwarf2_name or NULL. | |
11078 | ||
9c37b5ae | 11079 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
11080 | |
11081 | static const char * | |
15d034d0 | 11082 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 11083 | { |
94af9270 KS |
11084 | return dwarf2_compute_name (name, die, cu, 0); |
11085 | } | |
0114d602 | 11086 | |
94af9270 KS |
11087 | /* Construct a physname for the given DIE in CU. NAME may either be |
11088 | from a previous call to dwarf2_name or NULL. The result will be | |
11089 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
11090 | name. | |
0114d602 | 11091 | |
9c37b5ae | 11092 | The output string will be canonicalized (if C++). */ |
0114d602 | 11093 | |
94af9270 | 11094 | static const char * |
15d034d0 | 11095 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 11096 | { |
518817b3 | 11097 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 11098 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
11099 | int need_copy = 1; |
11100 | ||
11101 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
11102 | on its own. */ | |
11103 | if (!die_needs_namespace (die, cu)) | |
11104 | return dwarf2_compute_name (name, die, cu, 1); | |
11105 | ||
73b9be8b | 11106 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 11107 | |
e98c9e7c TT |
11108 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
11109 | See https://github.com/rust-lang/rust/issues/32925. */ | |
11110 | if (cu->language == language_rust && mangled != NULL | |
11111 | && strchr (mangled, '{') != NULL) | |
11112 | mangled = NULL; | |
11113 | ||
900e11f9 JK |
11114 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
11115 | has computed. */ | |
791afaa2 | 11116 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 11117 | if (mangled != NULL) |
900e11f9 | 11118 | { |
900e11f9 | 11119 | |
59cc4834 JB |
11120 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
11121 | { | |
11122 | /* Do nothing (do not demangle the symbol name). */ | |
11123 | } | |
11124 | else if (cu->language == language_go) | |
a766d390 | 11125 | { |
5e2db402 TT |
11126 | /* This is a lie, but we already lie to the caller new_symbol. |
11127 | new_symbol assumes we return the mangled name. | |
a766d390 | 11128 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
11129 | } |
11130 | else | |
11131 | { | |
0eb876f5 JB |
11132 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
11133 | their return type. It is easier for GDB users to search | |
11134 | for such functions as `name(params)' than `long name(params)'. | |
11135 | In such case the minimal symbol names do not match the full | |
11136 | symbol names but for template functions there is never a need | |
11137 | to look up their definition from their declaration so | |
11138 | the only disadvantage remains the minimal symbol variant | |
11139 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
11140 | demangled.reset (gdb_demangle (mangled, |
11141 | (DMGL_PARAMS | DMGL_ANSI | |
11142 | | DMGL_RET_DROP))); | |
a766d390 | 11143 | } |
900e11f9 | 11144 | if (demangled) |
791afaa2 | 11145 | canon = demangled.get (); |
900e11f9 JK |
11146 | else |
11147 | { | |
11148 | canon = mangled; | |
11149 | need_copy = 0; | |
11150 | } | |
11151 | } | |
11152 | ||
11153 | if (canon == NULL || check_physname) | |
11154 | { | |
11155 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
11156 | ||
11157 | if (canon != NULL && strcmp (physname, canon) != 0) | |
11158 | { | |
11159 | /* It may not mean a bug in GDB. The compiler could also | |
11160 | compute DW_AT_linkage_name incorrectly. But in such case | |
11161 | GDB would need to be bug-to-bug compatible. */ | |
11162 | ||
b98664d3 | 11163 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
11164 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
11165 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 11166 | objfile_name (objfile)); |
900e11f9 JK |
11167 | |
11168 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
11169 | is available here - over computed PHYSNAME. It is safer | |
11170 | against both buggy GDB and buggy compilers. */ | |
11171 | ||
11172 | retval = canon; | |
11173 | } | |
11174 | else | |
11175 | { | |
11176 | retval = physname; | |
11177 | need_copy = 0; | |
11178 | } | |
11179 | } | |
11180 | else | |
11181 | retval = canon; | |
11182 | ||
11183 | if (need_copy) | |
021887d8 | 11184 | retval = obstack_strdup (&objfile->per_bfd->storage_obstack, retval); |
900e11f9 | 11185 | |
900e11f9 | 11186 | return retval; |
0114d602 DJ |
11187 | } |
11188 | ||
74921315 KS |
11189 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
11190 | a new symbol for it. | |
11191 | ||
11192 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
11193 | ||
11194 | static int | |
11195 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
11196 | { | |
11197 | struct attribute *attr; | |
11198 | ||
11199 | /* If the die does not have a name, this is not a namespace | |
11200 | alias. */ | |
11201 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
11202 | if (attr != NULL) | |
11203 | { | |
11204 | int num; | |
11205 | struct die_info *d = die; | |
11206 | struct dwarf2_cu *imported_cu = cu; | |
11207 | ||
11208 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
11209 | keep inspecting DIEs until we hit the underlying import. */ | |
11210 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
11211 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
11212 | { | |
11213 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
11214 | if (attr == NULL) | |
11215 | break; | |
11216 | ||
11217 | d = follow_die_ref (d, attr, &imported_cu); | |
11218 | if (d->tag != DW_TAG_imported_declaration) | |
11219 | break; | |
11220 | } | |
11221 | ||
11222 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
11223 | { | |
b98664d3 | 11224 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 11225 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
11226 | return 0; |
11227 | } | |
11228 | ||
11229 | if (attr != NULL) | |
11230 | { | |
11231 | struct type *type; | |
9c541725 | 11232 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 11233 | |
9c541725 | 11234 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
11235 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
11236 | { | |
11237 | /* This declaration is a global namespace alias. Add | |
11238 | a symbol for it whose type is the aliased namespace. */ | |
11239 | new_symbol (die, type, cu); | |
11240 | return 1; | |
11241 | } | |
11242 | } | |
11243 | } | |
11244 | ||
11245 | return 0; | |
11246 | } | |
11247 | ||
22cee43f | 11248 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 11249 | current context for CU. |
22cee43f PMR |
11250 | |
11251 | For Ada, imported declarations can materialize renamings, which *may* be | |
11252 | global. However it is impossible (for now?) in DWARF to distinguish | |
11253 | "external" imported declarations and "static" ones. As all imported | |
11254 | declarations seem to be static in all other languages, make them all CU-wide | |
11255 | global only in Ada. */ | |
11256 | ||
11257 | static struct using_direct ** | |
804d2729 | 11258 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 11259 | { |
c24bdb02 KS |
11260 | if (cu->language == language_ada |
11261 | && cu->get_builder ()->outermost_context_p ()) | |
11262 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 11263 | else |
c24bdb02 | 11264 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
11265 | } |
11266 | ||
27aa8d6a SW |
11267 | /* Read the import statement specified by the given die and record it. */ |
11268 | ||
11269 | static void | |
11270 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
11271 | { | |
518817b3 | 11272 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 11273 | struct attribute *import_attr; |
32019081 | 11274 | struct die_info *imported_die, *child_die; |
de4affc9 | 11275 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 11276 | const char *imported_name; |
794684b6 | 11277 | const char *imported_name_prefix; |
13387711 SW |
11278 | const char *canonical_name; |
11279 | const char *import_alias; | |
11280 | const char *imported_declaration = NULL; | |
794684b6 | 11281 | const char *import_prefix; |
eb1e02fd | 11282 | std::vector<const char *> excludes; |
13387711 | 11283 | |
27aa8d6a SW |
11284 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
11285 | if (import_attr == NULL) | |
11286 | { | |
b98664d3 | 11287 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
11288 | dwarf_tag_name (die->tag)); |
11289 | return; | |
11290 | } | |
11291 | ||
de4affc9 CC |
11292 | imported_cu = cu; |
11293 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
11294 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
11295 | if (imported_name == NULL) |
11296 | { | |
11297 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
11298 | ||
11299 | The import in the following code: | |
11300 | namespace A | |
11301 | { | |
11302 | typedef int B; | |
11303 | } | |
11304 | ||
11305 | int main () | |
11306 | { | |
11307 | using A::B; | |
11308 | B b; | |
11309 | return b; | |
11310 | } | |
11311 | ||
11312 | ... | |
11313 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
11314 | <52> DW_AT_decl_file : 1 | |
11315 | <53> DW_AT_decl_line : 6 | |
11316 | <54> DW_AT_import : <0x75> | |
11317 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
11318 | <59> DW_AT_name : B | |
11319 | <5b> DW_AT_decl_file : 1 | |
11320 | <5c> DW_AT_decl_line : 2 | |
11321 | <5d> DW_AT_type : <0x6e> | |
11322 | ... | |
11323 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
11324 | <76> DW_AT_byte_size : 4 | |
11325 | <77> DW_AT_encoding : 5 (signed) | |
11326 | ||
11327 | imports the wrong die ( 0x75 instead of 0x58 ). | |
11328 | This case will be ignored until the gcc bug is fixed. */ | |
11329 | return; | |
11330 | } | |
11331 | ||
82856980 SW |
11332 | /* Figure out the local name after import. */ |
11333 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 11334 | |
794684b6 SW |
11335 | /* Figure out where the statement is being imported to. */ |
11336 | import_prefix = determine_prefix (die, cu); | |
11337 | ||
11338 | /* Figure out what the scope of the imported die is and prepend it | |
11339 | to the name of the imported die. */ | |
de4affc9 | 11340 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 11341 | |
f55ee35c JK |
11342 | if (imported_die->tag != DW_TAG_namespace |
11343 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 11344 | { |
13387711 SW |
11345 | imported_declaration = imported_name; |
11346 | canonical_name = imported_name_prefix; | |
794684b6 | 11347 | } |
13387711 | 11348 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 11349 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
11350 | imported_name_prefix, |
11351 | (cu->language == language_d ? "." : "::"), | |
11352 | imported_name, (char *) NULL); | |
13387711 SW |
11353 | else |
11354 | canonical_name = imported_name; | |
794684b6 | 11355 | |
32019081 JK |
11356 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
11357 | for (child_die = die->child; child_die && child_die->tag; | |
11358 | child_die = sibling_die (child_die)) | |
11359 | { | |
11360 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
11361 | represented by an imported module entry with an import attribute | |
11362 | referring to the module and owned entries corresponding to those | |
11363 | entities that are renamed as part of being imported. */ | |
11364 | ||
11365 | if (child_die->tag != DW_TAG_imported_declaration) | |
11366 | { | |
b98664d3 | 11367 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
11368 | "- DIE at %s [in module %s]"), |
11369 | sect_offset_str (child_die->sect_off), | |
11370 | objfile_name (objfile)); | |
32019081 JK |
11371 | continue; |
11372 | } | |
11373 | ||
11374 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
11375 | if (import_attr == NULL) | |
11376 | { | |
b98664d3 | 11377 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
11378 | dwarf_tag_name (child_die->tag)); |
11379 | continue; | |
11380 | } | |
11381 | ||
11382 | imported_cu = cu; | |
11383 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
11384 | &imported_cu); | |
11385 | imported_name = dwarf2_name (imported_die, imported_cu); | |
11386 | if (imported_name == NULL) | |
11387 | { | |
b98664d3 | 11388 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
11389 | "imported name - DIE at %s [in module %s]"), |
11390 | sect_offset_str (child_die->sect_off), | |
11391 | objfile_name (objfile)); | |
32019081 JK |
11392 | continue; |
11393 | } | |
11394 | ||
eb1e02fd | 11395 | excludes.push_back (imported_name); |
32019081 JK |
11396 | |
11397 | process_die (child_die, cu); | |
11398 | } | |
11399 | ||
804d2729 | 11400 | add_using_directive (using_directives (cu), |
22cee43f PMR |
11401 | import_prefix, |
11402 | canonical_name, | |
11403 | import_alias, | |
11404 | imported_declaration, | |
11405 | excludes, | |
11406 | 0, | |
11407 | &objfile->objfile_obstack); | |
27aa8d6a SW |
11408 | } |
11409 | ||
5230b05a WT |
11410 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
11411 | types, but gives them a size of zero. Starting with version 14, | |
11412 | ICC is compatible with GCC. */ | |
11413 | ||
9068261f | 11414 | static bool |
5230b05a WT |
11415 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
11416 | { | |
11417 | if (!cu->checked_producer) | |
11418 | check_producer (cu); | |
11419 | ||
11420 | return cu->producer_is_icc_lt_14; | |
11421 | } | |
11422 | ||
eb77c9df AB |
11423 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
11424 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
11425 | which says that void functions should not have a DW_AT_type. */ | |
11426 | ||
11427 | static bool | |
11428 | producer_is_icc (struct dwarf2_cu *cu) | |
11429 | { | |
11430 | if (!cu->checked_producer) | |
11431 | check_producer (cu); | |
11432 | ||
11433 | return cu->producer_is_icc; | |
11434 | } | |
11435 | ||
1b80a9fa JK |
11436 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
11437 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
11438 | this, it was first present in GCC release 4.3.0. */ | |
11439 | ||
9068261f | 11440 | static bool |
1b80a9fa JK |
11441 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
11442 | { | |
11443 | if (!cu->checked_producer) | |
11444 | check_producer (cu); | |
11445 | ||
11446 | return cu->producer_is_gcc_lt_4_3; | |
11447 | } | |
11448 | ||
d721ba37 PA |
11449 | static file_and_directory |
11450 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 11451 | { |
d721ba37 PA |
11452 | file_and_directory res; |
11453 | ||
9291a0cd TT |
11454 | /* Find the filename. Do not use dwarf2_name here, since the filename |
11455 | is not a source language identifier. */ | |
d721ba37 PA |
11456 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
11457 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 11458 | |
d721ba37 PA |
11459 | if (res.comp_dir == NULL |
11460 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
11461 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 11462 | { |
d721ba37 PA |
11463 | res.comp_dir_storage = ldirname (res.name); |
11464 | if (!res.comp_dir_storage.empty ()) | |
11465 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 11466 | } |
d721ba37 | 11467 | if (res.comp_dir != NULL) |
9291a0cd TT |
11468 | { |
11469 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
11470 | directory, get rid of it. */ | |
d721ba37 | 11471 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 11472 | |
d721ba37 PA |
11473 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
11474 | res.comp_dir = cp + 1; | |
9291a0cd TT |
11475 | } |
11476 | ||
d721ba37 PA |
11477 | if (res.name == NULL) |
11478 | res.name = "<unknown>"; | |
11479 | ||
11480 | return res; | |
9291a0cd TT |
11481 | } |
11482 | ||
f4dc4d17 DE |
11483 | /* Handle DW_AT_stmt_list for a compilation unit. |
11484 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
11485 | COMP_DIR is the compilation directory. LOWPC is passed to |
11486 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
11487 | |
11488 | static void | |
11489 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 11490 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 11491 | { |
518817b3 SM |
11492 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11493 | = cu->per_cu->dwarf2_per_objfile; | |
527f3840 | 11494 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ab95328 | 11495 | struct attribute *attr; |
527f3840 JK |
11496 | struct line_header line_header_local; |
11497 | hashval_t line_header_local_hash; | |
527f3840 JK |
11498 | void **slot; |
11499 | int decode_mapping; | |
2ab95328 | 11500 | |
f4dc4d17 DE |
11501 | gdb_assert (! cu->per_cu->is_debug_types); |
11502 | ||
2ab95328 | 11503 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
11504 | if (attr == NULL) |
11505 | return; | |
11506 | ||
9c541725 | 11507 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
11508 | |
11509 | /* The line header hash table is only created if needed (it exists to | |
11510 | prevent redundant reading of the line table for partial_units). | |
11511 | If we're given a partial_unit, we'll need it. If we're given a | |
11512 | compile_unit, then use the line header hash table if it's already | |
11513 | created, but don't create one just yet. */ | |
11514 | ||
11515 | if (dwarf2_per_objfile->line_header_hash == NULL | |
11516 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 11517 | { |
527f3840 JK |
11518 | dwarf2_per_objfile->line_header_hash |
11519 | = htab_create_alloc_ex (127, line_header_hash_voidp, | |
11520 | line_header_eq_voidp, | |
11521 | free_line_header_voidp, | |
11522 | &objfile->objfile_obstack, | |
11523 | hashtab_obstack_allocate, | |
11524 | dummy_obstack_deallocate); | |
11525 | } | |
2ab95328 | 11526 | |
9c541725 | 11527 | line_header_local.sect_off = line_offset; |
527f3840 JK |
11528 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
11529 | line_header_local_hash = line_header_hash (&line_header_local); | |
11530 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
11531 | { | |
11532 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11533 | &line_header_local, | |
11534 | line_header_local_hash, NO_INSERT); | |
11535 | ||
11536 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
11537 | is not present in *SLOT (since if there is something in *SLOT then | |
11538 | it will be for a partial_unit). */ | |
11539 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 11540 | { |
527f3840 | 11541 | gdb_assert (*slot != NULL); |
9a3c8263 | 11542 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 11543 | return; |
dee91e82 | 11544 | } |
2ab95328 | 11545 | } |
527f3840 JK |
11546 | |
11547 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
11548 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
11549 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
11550 | if (lh == NULL) | |
527f3840 | 11551 | return; |
4c8aa72d PA |
11552 | |
11553 | cu->line_header = lh.release (); | |
11554 | cu->line_header_die_owner = die; | |
527f3840 JK |
11555 | |
11556 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
11557 | slot = NULL; | |
11558 | else | |
11559 | { | |
11560 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash, | |
11561 | &line_header_local, | |
11562 | line_header_local_hash, INSERT); | |
11563 | gdb_assert (slot != NULL); | |
11564 | } | |
11565 | if (slot != NULL && *slot == NULL) | |
11566 | { | |
11567 | /* This newly decoded line number information unit will be owned | |
11568 | by line_header_hash hash table. */ | |
11569 | *slot = cu->line_header; | |
4c8aa72d | 11570 | cu->line_header_die_owner = NULL; |
527f3840 JK |
11571 | } |
11572 | else | |
11573 | { | |
11574 | /* We cannot free any current entry in (*slot) as that struct line_header | |
11575 | may be already used by multiple CUs. Create only temporary decoded | |
11576 | line_header for this CU - it may happen at most once for each line | |
11577 | number information unit. And if we're not using line_header_hash | |
11578 | then this is what we want as well. */ | |
11579 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
11580 | } |
11581 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
11582 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
11583 | decode_mapping); | |
fff8551c | 11584 | |
2ab95328 TT |
11585 | } |
11586 | ||
95554aad | 11587 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 11588 | |
c906108c | 11589 | static void |
e7c27a73 | 11590 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 11591 | { |
518817b3 SM |
11592 | struct dwarf2_per_objfile *dwarf2_per_objfile |
11593 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 11594 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 11595 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 11596 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
11597 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
11598 | struct attribute *attr; | |
c906108c | 11599 | struct die_info *child_die; |
e142c38c | 11600 | CORE_ADDR baseaddr; |
6e70227d | 11601 | |
380618d6 | 11602 | prepare_one_comp_unit (cu, die, cu->language); |
6a053cb1 | 11603 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
c906108c | 11604 | |
fae299cd | 11605 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
11606 | |
11607 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
11608 | from finish_block. */ | |
2acceee2 | 11609 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 11610 | lowpc = highpc; |
3e29f34a | 11611 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 11612 | |
d721ba37 | 11613 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 11614 | |
f4b8a18d KW |
11615 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
11616 | standardised yet. As a workaround for the language detection we fall | |
11617 | back to the DW_AT_producer string. */ | |
11618 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
11619 | cu->language = language_opencl; | |
11620 | ||
3019eac3 DE |
11621 | /* Similar hack for Go. */ |
11622 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
11623 | set_cu_language (DW_LANG_Go, cu); | |
11624 | ||
c24bdb02 | 11625 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
11626 | |
11627 | /* Decode line number information if present. We do this before | |
11628 | processing child DIEs, so that the line header table is available | |
11629 | for DW_AT_decl_file. */ | |
d721ba37 | 11630 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
11631 | |
11632 | /* Process all dies in compilation unit. */ | |
11633 | if (die->child != NULL) | |
11634 | { | |
11635 | child_die = die->child; | |
11636 | while (child_die && child_die->tag) | |
11637 | { | |
11638 | process_die (child_die, cu); | |
11639 | child_die = sibling_die (child_die); | |
11640 | } | |
11641 | } | |
11642 | ||
11643 | /* Decode macro information, if present. Dwarf 2 macro information | |
11644 | refers to information in the line number info statement program | |
11645 | header, so we can only read it if we've read the header | |
11646 | successfully. */ | |
0af92d60 JK |
11647 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
11648 | if (attr == NULL) | |
11649 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
11650 | if (attr && cu->line_header) |
11651 | { | |
11652 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 11653 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 11654 | |
43f3e411 | 11655 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
11656 | } |
11657 | else | |
11658 | { | |
11659 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
11660 | if (attr && cu->line_header) | |
11661 | { | |
11662 | unsigned int macro_offset = DW_UNSND (attr); | |
11663 | ||
43f3e411 | 11664 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
11665 | } |
11666 | } | |
3019eac3 DE |
11667 | } |
11668 | ||
c24bdb02 KS |
11669 | void |
11670 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 11671 | { |
f4dc4d17 DE |
11672 | struct type_unit_group *tu_group; |
11673 | int first_time; | |
3019eac3 | 11674 | struct attribute *attr; |
9c541725 | 11675 | unsigned int i; |
0186c6a7 | 11676 | struct signatured_type *sig_type; |
3019eac3 | 11677 | |
f4dc4d17 | 11678 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 11679 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 11680 | |
c24bdb02 | 11681 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 11682 | |
f4dc4d17 | 11683 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 11684 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 11685 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 11686 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 11687 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
11688 | |
11689 | /* If we've already processed this stmt_list there's no real need to | |
11690 | do it again, we could fake it and just recreate the part we need | |
11691 | (file name,index -> symtab mapping). If data shows this optimization | |
11692 | is useful we can do it then. */ | |
43f3e411 | 11693 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
11694 | |
11695 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
11696 | debug info. */ | |
fff8551c | 11697 | line_header_up lh; |
f4dc4d17 | 11698 | if (attr != NULL) |
3019eac3 | 11699 | { |
9c541725 | 11700 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 11701 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
11702 | } |
11703 | if (lh == NULL) | |
11704 | { | |
11705 | if (first_time) | |
c24bdb02 | 11706 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
11707 | else |
11708 | { | |
11709 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 11710 | gdb_assert (m_builder == nullptr); |
804d2729 | 11711 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11712 | m_builder.reset (new struct buildsym_compunit |
11713 | (COMPUNIT_OBJFILE (cust), "", | |
11714 | COMPUNIT_DIRNAME (cust), | |
11715 | compunit_language (cust), | |
11716 | 0, cust)); | |
f4dc4d17 | 11717 | } |
f4dc4d17 | 11718 | return; |
3019eac3 DE |
11719 | } |
11720 | ||
c24bdb02 KS |
11721 | line_header = lh.release (); |
11722 | line_header_die_owner = die; | |
3019eac3 | 11723 | |
f4dc4d17 DE |
11724 | if (first_time) |
11725 | { | |
c24bdb02 | 11726 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 11727 | |
1fd60fc0 DE |
11728 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
11729 | still initializing it, and our caller (a few levels up) | |
11730 | process_full_type_unit still needs to know if this is the first | |
11731 | time. */ | |
11732 | ||
7ba99d21 | 11733 | tu_group->num_symtabs = line_header->file_names_size (); |
4c8aa72d | 11734 | tu_group->symtabs = XNEWVEC (struct symtab *, |
7ba99d21 | 11735 | line_header->file_names_size ()); |
3019eac3 | 11736 | |
7ba99d21 AT |
11737 | auto &file_names = line_header->file_names (); |
11738 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 11739 | { |
7ba99d21 | 11740 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
11741 | dwarf2_start_subfile (this, fe.name, |
11742 | fe.include_dir (line_header)); | |
11743 | buildsym_compunit *b = get_builder (); | |
11744 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 11745 | { |
4c8aa72d PA |
11746 | /* NOTE: start_subfile will recognize when it's been |
11747 | passed a file it has already seen. So we can't | |
11748 | assume there's a simple mapping from | |
11749 | cu->line_header->file_names to subfiles, plus | |
11750 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
11751 | b->get_current_subfile ()->symtab |
11752 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
11753 | } |
11754 | ||
c24bdb02 | 11755 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 11756 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
11757 | } |
11758 | } | |
11759 | else | |
3019eac3 | 11760 | { |
c24bdb02 | 11761 | gdb_assert (m_builder == nullptr); |
804d2729 | 11762 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
11763 | m_builder.reset (new struct buildsym_compunit |
11764 | (COMPUNIT_OBJFILE (cust), "", | |
11765 | COMPUNIT_DIRNAME (cust), | |
11766 | compunit_language (cust), | |
11767 | 0, cust)); | |
f4dc4d17 | 11768 | |
7ba99d21 AT |
11769 | auto &file_names = line_header->file_names (); |
11770 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 11771 | { |
7ba99d21 | 11772 | file_entry &fe = file_names[i]; |
4c8aa72d | 11773 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 11774 | } |
3019eac3 DE |
11775 | } |
11776 | ||
f4dc4d17 DE |
11777 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
11778 | so they don't have a "real" (so to speak) symtab anyway. | |
11779 | There is later code that will assign the main symtab to all symbols | |
11780 | that don't have one. We need to handle the case of a symbol with a | |
11781 | missing symtab (DW_AT_decl_file) anyway. */ | |
11782 | } | |
3019eac3 | 11783 | |
f4dc4d17 DE |
11784 | /* Process DW_TAG_type_unit. |
11785 | For TUs we want to skip the first top level sibling if it's not the | |
11786 | actual type being defined by this TU. In this case the first top | |
11787 | level sibling is there to provide context only. */ | |
3019eac3 | 11788 | |
f4dc4d17 DE |
11789 | static void |
11790 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
11791 | { | |
11792 | struct die_info *child_die; | |
3019eac3 | 11793 | |
f4dc4d17 DE |
11794 | prepare_one_comp_unit (cu, die, language_minimal); |
11795 | ||
11796 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
11797 | We do this before processing child DIEs, so that the line header table | |
11798 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 11799 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
11800 | |
11801 | if (die->child != NULL) | |
11802 | { | |
11803 | child_die = die->child; | |
11804 | while (child_die && child_die->tag) | |
11805 | { | |
11806 | process_die (child_die, cu); | |
11807 | child_die = sibling_die (child_die); | |
11808 | } | |
11809 | } | |
3019eac3 DE |
11810 | } |
11811 | \f | |
80626a55 DE |
11812 | /* DWO/DWP files. |
11813 | ||
11814 | http://gcc.gnu.org/wiki/DebugFission | |
11815 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
11816 | ||
11817 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
11818 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
11819 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
11820 | |
11821 | static hashval_t | |
11822 | hash_dwo_file (const void *item) | |
11823 | { | |
9a3c8263 | 11824 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 11825 | hashval_t hash; |
3019eac3 | 11826 | |
a2ce51a0 DE |
11827 | hash = htab_hash_string (dwo_file->dwo_name); |
11828 | if (dwo_file->comp_dir != NULL) | |
11829 | hash += htab_hash_string (dwo_file->comp_dir); | |
11830 | return hash; | |
3019eac3 DE |
11831 | } |
11832 | ||
11833 | static int | |
11834 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
11835 | { | |
9a3c8263 SM |
11836 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11837 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11838 | |
a2ce51a0 DE |
11839 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11840 | return 0; | |
11841 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11842 | return lhs->comp_dir == rhs->comp_dir; | |
11843 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11844 | } |
11845 | ||
11846 | /* Allocate a hash table for DWO files. */ | |
11847 | ||
51ac9db5 | 11848 | static htab_up |
ed2dc618 | 11849 | allocate_dwo_file_hash_table (struct objfile *objfile) |
3019eac3 | 11850 | { |
51ac9db5 SM |
11851 | auto delete_dwo_file = [] (void *item) |
11852 | { | |
11853 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
11854 | ||
11855 | delete dwo_file; | |
11856 | }; | |
11857 | ||
11858 | return htab_up (htab_create_alloc_ex (41, | |
11859 | hash_dwo_file, | |
11860 | eq_dwo_file, | |
11861 | delete_dwo_file, | |
11862 | &objfile->objfile_obstack, | |
11863 | hashtab_obstack_allocate, | |
11864 | dummy_obstack_deallocate)); | |
3019eac3 DE |
11865 | } |
11866 | ||
80626a55 DE |
11867 | /* Lookup DWO file DWO_NAME. */ |
11868 | ||
11869 | static void ** | |
ed2dc618 SM |
11870 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11871 | const char *dwo_name, | |
11872 | const char *comp_dir) | |
80626a55 DE |
11873 | { |
11874 | struct dwo_file find_entry; | |
11875 | void **slot; | |
11876 | ||
11877 | if (dwarf2_per_objfile->dwo_files == NULL) | |
ed2dc618 SM |
11878 | dwarf2_per_objfile->dwo_files |
11879 | = allocate_dwo_file_hash_table (dwarf2_per_objfile->objfile); | |
80626a55 | 11880 | |
0ac5b59e DE |
11881 | find_entry.dwo_name = dwo_name; |
11882 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11883 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11884 | INSERT); | |
80626a55 DE |
11885 | |
11886 | return slot; | |
11887 | } | |
11888 | ||
3019eac3 DE |
11889 | static hashval_t |
11890 | hash_dwo_unit (const void *item) | |
11891 | { | |
9a3c8263 | 11892 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11893 | |
11894 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11895 | return dwo_unit->signature; | |
11896 | } | |
11897 | ||
11898 | static int | |
11899 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11900 | { | |
9a3c8263 SM |
11901 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11902 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11903 | |
11904 | /* The signature is assumed to be unique within the DWO file. | |
11905 | So while object file CU dwo_id's always have the value zero, | |
11906 | that's OK, assuming each object file DWO file has only one CU, | |
11907 | and that's the rule for now. */ | |
11908 | return lhs->signature == rhs->signature; | |
11909 | } | |
11910 | ||
11911 | /* Allocate a hash table for DWO CUs,TUs. | |
11912 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11913 | ||
11914 | static htab_t | |
11915 | allocate_dwo_unit_table (struct objfile *objfile) | |
11916 | { | |
11917 | /* Start out with a pretty small number. | |
11918 | Generally DWO files contain only one CU and maybe some TUs. */ | |
11919 | return htab_create_alloc_ex (3, | |
11920 | hash_dwo_unit, | |
11921 | eq_dwo_unit, | |
11922 | NULL, | |
11923 | &objfile->objfile_obstack, | |
11924 | hashtab_obstack_allocate, | |
11925 | dummy_obstack_deallocate); | |
11926 | } | |
11927 | ||
80626a55 | 11928 | /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */ |
3019eac3 | 11929 | |
19c3d4c9 | 11930 | struct create_dwo_cu_data |
3019eac3 DE |
11931 | { |
11932 | struct dwo_file *dwo_file; | |
19c3d4c9 | 11933 | struct dwo_unit dwo_unit; |
3019eac3 DE |
11934 | }; |
11935 | ||
19c3d4c9 | 11936 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11937 | |
11938 | static void | |
19c3d4c9 DE |
11939 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11940 | const gdb_byte *info_ptr, | |
11941 | struct die_info *comp_unit_die, | |
11942 | int has_children, | |
11943 | void *datap) | |
3019eac3 DE |
11944 | { |
11945 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11946 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11947 | struct dwarf2_section_info *section = cu->per_cu->section; |
9a3c8263 | 11948 | struct create_dwo_cu_data *data = (struct create_dwo_cu_data *) datap; |
3019eac3 | 11949 | struct dwo_file *dwo_file = data->dwo_file; |
19c3d4c9 | 11950 | struct dwo_unit *dwo_unit = &data->dwo_unit; |
3019eac3 | 11951 | |
a084a2a6 AT |
11952 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11953 | if (!signature.has_value ()) | |
3019eac3 | 11954 | { |
b98664d3 | 11955 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11956 | " its dwo_id [in module %s]"), |
9d8780f0 | 11957 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11958 | return; |
11959 | } | |
11960 | ||
3019eac3 | 11961 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11962 | dwo_unit->signature = *signature; |
8a0459fd | 11963 | dwo_unit->section = section; |
9c541725 | 11964 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11965 | dwo_unit->length = cu->per_cu->length; |
11966 | ||
b4f54984 | 11967 | if (dwarf_read_debug) |
9d8780f0 SM |
11968 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11969 | sect_offset_str (sect_off), | |
9c541725 | 11970 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11971 | } |
11972 | ||
33c5cd75 | 11973 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11974 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11975 | |
33c5cd75 | 11976 | static void |
ed2dc618 SM |
11977 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11978 | struct dwo_file &dwo_file, dwarf2_section_info §ion, | |
33c5cd75 | 11979 | htab_t &cus_htab) |
3019eac3 DE |
11980 | { |
11981 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11982 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11983 | |
33c5cd75 DB |
11984 | dwarf2_read_section (objfile, §ion); |
11985 | info_ptr = section.buffer; | |
3019eac3 DE |
11986 | |
11987 | if (info_ptr == NULL) | |
33c5cd75 | 11988 | return; |
3019eac3 | 11989 | |
b4f54984 | 11990 | if (dwarf_read_debug) |
19c3d4c9 DE |
11991 | { |
11992 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
33c5cd75 DB |
11993 | get_section_name (§ion), |
11994 | get_section_file_name (§ion)); | |
19c3d4c9 | 11995 | } |
3019eac3 | 11996 | |
33c5cd75 | 11997 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11998 | while (info_ptr < end_ptr) |
11999 | { | |
12000 | struct dwarf2_per_cu_data per_cu; | |
33c5cd75 DB |
12001 | struct create_dwo_cu_data create_dwo_cu_data; |
12002 | struct dwo_unit *dwo_unit; | |
12003 | void **slot; | |
12004 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 12005 | |
19c3d4c9 DE |
12006 | memset (&create_dwo_cu_data.dwo_unit, 0, |
12007 | sizeof (create_dwo_cu_data.dwo_unit)); | |
3019eac3 | 12008 | memset (&per_cu, 0, sizeof (per_cu)); |
e3b94546 | 12009 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 12010 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
12011 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
12012 | per_cu.section = §ion; | |
c5ed0576 | 12013 | create_dwo_cu_data.dwo_file = &dwo_file; |
33c5cd75 DB |
12014 | |
12015 | init_cutu_and_read_dies_no_follow ( | |
12016 | &per_cu, &dwo_file, create_dwo_cu_reader, &create_dwo_cu_data); | |
12017 | info_ptr += per_cu.length; | |
12018 | ||
12019 | // If the unit could not be parsed, skip it. | |
12020 | if (create_dwo_cu_data.dwo_unit.dwo_file == NULL) | |
12021 | continue; | |
3019eac3 | 12022 | |
33c5cd75 DB |
12023 | if (cus_htab == NULL) |
12024 | cus_htab = allocate_dwo_unit_table (objfile); | |
19c3d4c9 | 12025 | |
33c5cd75 DB |
12026 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
12027 | *dwo_unit = create_dwo_cu_data.dwo_unit; | |
12028 | slot = htab_find_slot (cus_htab, dwo_unit, INSERT); | |
12029 | gdb_assert (slot != NULL); | |
12030 | if (*slot != NULL) | |
19c3d4c9 | 12031 | { |
33c5cd75 DB |
12032 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
12033 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 12034 | |
b98664d3 | 12035 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
12036 | " the entry at offset %s, signature %s"), |
12037 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 12038 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 12039 | } |
33c5cd75 | 12040 | *slot = (void *)dwo_unit; |
3019eac3 | 12041 | } |
3019eac3 DE |
12042 | } |
12043 | ||
80626a55 DE |
12044 | /* DWP file .debug_{cu,tu}_index section format: |
12045 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
12046 | ||
d2415c6c DE |
12047 | DWP Version 1: |
12048 | ||
80626a55 DE |
12049 | Both index sections have the same format, and serve to map a 64-bit |
12050 | signature to a set of section numbers. Each section begins with a header, | |
12051 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
12052 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
12053 | aligned at 8-byte boundaries in the file. | |
12054 | ||
d2415c6c DE |
12055 | The index section header consists of: |
12056 | ||
12057 | V, 32 bit version number | |
12058 | -, 32 bits unused | |
12059 | N, 32 bit number of compilation units or type units in the index | |
12060 | M, 32 bit number of slots in the hash table | |
80626a55 | 12061 | |
d2415c6c | 12062 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 12063 | |
d2415c6c DE |
12064 | The hash table begins at offset 16 in the section, and consists of an array |
12065 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
12066 | order of the application binary). Unused slots in the hash table are 0. | |
12067 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 12068 | |
d2415c6c DE |
12069 | The parallel table begins immediately after the hash table |
12070 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
12071 | array of 32-bit indexes (using the byte order of the application binary), | |
12072 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
12073 | table contains a 32-bit index into the pool of section numbers. For unused | |
12074 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 12075 | |
73869dc2 DE |
12076 | The pool of section numbers begins immediately following the hash table |
12077 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
12078 | section numbers consists of an array of 32-bit words (using the byte order | |
12079 | of the application binary). Each item in the array is indexed starting | |
12080 | from 0. The hash table entry provides the index of the first section | |
12081 | number in the set. Additional section numbers in the set follow, and the | |
12082 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
12083 | ||
12084 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
12085 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
12086 | be the second entry. Other members of the set may follow in any order. | |
12087 | ||
12088 | --- | |
12089 | ||
12090 | DWP Version 2: | |
12091 | ||
12092 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
12093 | and the entries in the index tables are now offsets into these sections. | |
12094 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
12095 | section. | |
12096 | ||
12097 | Index Section Contents: | |
12098 | Header | |
12099 | Hash Table of Signatures dwp_hash_table.hash_table | |
12100 | Parallel Table of Indices dwp_hash_table.unit_table | |
12101 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
12102 | Table of Section Sizes dwp_hash_table.v2.sizes | |
12103 | ||
12104 | The index section header consists of: | |
12105 | ||
12106 | V, 32 bit version number | |
12107 | L, 32 bit number of columns in the table of section offsets | |
12108 | N, 32 bit number of compilation units or type units in the index | |
12109 | M, 32 bit number of slots in the hash table | |
12110 | ||
12111 | Numbers are recorded using the byte order of the application binary. | |
12112 | ||
12113 | The hash table has the same format as version 1. | |
12114 | The parallel table of indices has the same format as version 1, | |
12115 | except that the entries are origin-1 indices into the table of sections | |
12116 | offsets and the table of section sizes. | |
12117 | ||
12118 | The table of offsets begins immediately following the parallel table | |
12119 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
12120 | a two-dimensional array of 32-bit words (using the byte order of the | |
12121 | application binary), with L columns and N+1 rows, in row-major order. | |
12122 | Each row in the array is indexed starting from 0. The first row provides | |
12123 | a key to the remaining rows: each column in this row provides an identifier | |
12124 | for a debug section, and the offsets in the same column of subsequent rows | |
12125 | refer to that section. The section identifiers are: | |
12126 | ||
12127 | DW_SECT_INFO 1 .debug_info.dwo | |
12128 | DW_SECT_TYPES 2 .debug_types.dwo | |
12129 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
12130 | DW_SECT_LINE 4 .debug_line.dwo | |
12131 | DW_SECT_LOC 5 .debug_loc.dwo | |
12132 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
12133 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
12134 | DW_SECT_MACRO 8 .debug_macro.dwo | |
12135 | ||
12136 | The offsets provided by the CU and TU index sections are the base offsets | |
12137 | for the contributions made by each CU or TU to the corresponding section | |
12138 | in the package file. Each CU and TU header contains an abbrev_offset | |
12139 | field, used to find the abbreviations table for that CU or TU within the | |
12140 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
12141 | be interpreted as relative to the base offset given in the index section. | |
12142 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
12143 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
12144 | and offsets into other debug sections obtained from DWARF attributes should | |
12145 | also be interpreted as relative to the corresponding base offset. | |
12146 | ||
12147 | The table of sizes begins immediately following the table of offsets. | |
12148 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
12149 | with L columns and N rows, in row-major order. Each row in the array is | |
12150 | indexed starting from 1 (row 0 is shared by the two tables). | |
12151 | ||
12152 | --- | |
12153 | ||
12154 | Hash table lookup is handled the same in version 1 and 2: | |
12155 | ||
12156 | We assume that N and M will not exceed 2^32 - 1. | |
12157 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
12158 | ||
d2415c6c DE |
12159 | Given a 64-bit compilation unit signature or a type signature S, an entry |
12160 | in the hash table is located as follows: | |
80626a55 | 12161 | |
d2415c6c DE |
12162 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
12163 | the low-order k bits all set to 1. | |
80626a55 | 12164 | |
d2415c6c | 12165 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 12166 | |
d2415c6c DE |
12167 | 3) If the hash table entry at index H matches the signature, use that |
12168 | entry. If the hash table entry at index H is unused (all zeroes), | |
12169 | terminate the search: the signature is not present in the table. | |
80626a55 | 12170 | |
d2415c6c | 12171 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 12172 | |
d2415c6c | 12173 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 12174 | to stop at an unused slot or find the match. */ |
80626a55 DE |
12175 | |
12176 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
12177 | .debug_{info,types}.dwo in DWP_FILE. | |
12178 | Returns NULL if there isn't one. | |
12179 | Note: This function processes DWP files only, not DWO files. */ | |
12180 | ||
12181 | static struct dwp_hash_table * | |
ed2dc618 SM |
12182 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12183 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
12184 | { |
12185 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 12186 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 12187 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 12188 | struct dwarf2_section_info *index; |
73869dc2 | 12189 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
12190 | struct dwp_hash_table *htab; |
12191 | ||
12192 | if (is_debug_types) | |
12193 | index = &dwp_file->sections.tu_index; | |
12194 | else | |
12195 | index = &dwp_file->sections.cu_index; | |
12196 | ||
12197 | if (dwarf2_section_empty_p (index)) | |
12198 | return NULL; | |
12199 | dwarf2_read_section (objfile, index); | |
12200 | ||
12201 | index_ptr = index->buffer; | |
12202 | index_end = index_ptr + index->size; | |
12203 | ||
12204 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
12205 | index_ptr += 4; |
12206 | if (version == 2) | |
12207 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
12208 | else | |
12209 | nr_columns = 0; | |
12210 | index_ptr += 4; | |
80626a55 DE |
12211 | nr_units = read_4_bytes (dbfd, index_ptr); |
12212 | index_ptr += 4; | |
12213 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
12214 | index_ptr += 4; | |
12215 | ||
73869dc2 | 12216 | if (version != 1 && version != 2) |
80626a55 | 12217 | { |
21aa081e | 12218 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 12219 | " [in module %s]"), |
21aa081e | 12220 | pulongest (version), dwp_file->name); |
80626a55 DE |
12221 | } |
12222 | if (nr_slots != (nr_slots & -nr_slots)) | |
12223 | { | |
21aa081e | 12224 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 12225 | " is not power of 2 [in module %s]"), |
21aa081e | 12226 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
12227 | } |
12228 | ||
12229 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
12230 | htab->version = version; |
12231 | htab->nr_columns = nr_columns; | |
80626a55 DE |
12232 | htab->nr_units = nr_units; |
12233 | htab->nr_slots = nr_slots; | |
12234 | htab->hash_table = index_ptr; | |
12235 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
12236 | |
12237 | /* Exit early if the table is empty. */ | |
12238 | if (nr_slots == 0 || nr_units == 0 | |
12239 | || (version == 2 && nr_columns == 0)) | |
12240 | { | |
12241 | /* All must be zero. */ | |
12242 | if (nr_slots != 0 || nr_units != 0 | |
12243 | || (version == 2 && nr_columns != 0)) | |
12244 | { | |
b98664d3 | 12245 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
12246 | " all zero [in modules %s]"), |
12247 | dwp_file->name); | |
12248 | } | |
12249 | return htab; | |
12250 | } | |
12251 | ||
12252 | if (version == 1) | |
12253 | { | |
12254 | htab->section_pool.v1.indices = | |
12255 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12256 | /* It's harder to decide whether the section is too small in v1. | |
12257 | V1 is deprecated anyway so we punt. */ | |
12258 | } | |
12259 | else | |
12260 | { | |
12261 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
12262 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 12263 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
12264 | /* Reverse map for error checking. */ |
12265 | int ids_seen[DW_SECT_MAX + 1]; | |
12266 | int i; | |
12267 | ||
12268 | if (nr_columns < 2) | |
12269 | { | |
12270 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
12271 | " in section table [in module %s]"), | |
12272 | dwp_file->name); | |
12273 | } | |
12274 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
12275 | { | |
12276 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
12277 | " in section table [in module %s]"), | |
12278 | dwp_file->name); | |
12279 | } | |
04fd5eed GB |
12280 | memset (ids, 255, sizeof_ids); |
12281 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
12282 | for (i = 0; i < nr_columns; ++i) |
12283 | { | |
12284 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
12285 | ||
12286 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
12287 | { | |
12288 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
12289 | " in section table [in module %s]"), | |
12290 | id, dwp_file->name); | |
12291 | } | |
12292 | if (ids_seen[id] != -1) | |
12293 | { | |
12294 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
12295 | " id %d in section table [in module %s]"), | |
12296 | id, dwp_file->name); | |
12297 | } | |
12298 | ids_seen[id] = i; | |
12299 | ids[i] = id; | |
12300 | } | |
12301 | /* Must have exactly one info or types section. */ | |
12302 | if (((ids_seen[DW_SECT_INFO] != -1) | |
12303 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
12304 | != 1) | |
12305 | { | |
12306 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
12307 | " DWO info/types section [in module %s]"), | |
12308 | dwp_file->name); | |
12309 | } | |
12310 | /* Must have an abbrev section. */ | |
12311 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
12312 | { | |
12313 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
12314 | " section [in module %s]"), | |
12315 | dwp_file->name); | |
12316 | } | |
12317 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
12318 | htab->section_pool.v2.sizes = | |
12319 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
12320 | * nr_units * nr_columns); | |
12321 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
12322 | * nr_units * nr_columns)) | |
12323 | > index_end) | |
12324 | { | |
12325 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
12326 | " [in module %s]"), | |
12327 | dwp_file->name); | |
12328 | } | |
12329 | } | |
80626a55 DE |
12330 | |
12331 | return htab; | |
12332 | } | |
12333 | ||
12334 | /* Update SECTIONS with the data from SECTP. | |
12335 | ||
12336 | This function is like the other "locate" section routines that are | |
12337 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 12338 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
12339 | |
12340 | The result is non-zero for success, or zero if an error was found. */ | |
12341 | ||
12342 | static int | |
73869dc2 DE |
12343 | locate_v1_virtual_dwo_sections (asection *sectp, |
12344 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
12345 | { |
12346 | const struct dwop_section_names *names = &dwop_section_names; | |
12347 | ||
12348 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12349 | { | |
12350 | /* There can be only one. */ | |
049412e3 | 12351 | if (sections->abbrev.s.section != NULL) |
80626a55 | 12352 | return 0; |
049412e3 | 12353 | sections->abbrev.s.section = sectp; |
fd361982 | 12354 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12355 | } |
12356 | else if (section_is_p (sectp->name, &names->info_dwo) | |
12357 | || section_is_p (sectp->name, &names->types_dwo)) | |
12358 | { | |
12359 | /* There can be only one. */ | |
049412e3 | 12360 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 12361 | return 0; |
049412e3 | 12362 | sections->info_or_types.s.section = sectp; |
fd361982 | 12363 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 DE |
12364 | } |
12365 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12366 | { | |
12367 | /* There can be only one. */ | |
049412e3 | 12368 | if (sections->line.s.section != NULL) |
80626a55 | 12369 | return 0; |
049412e3 | 12370 | sections->line.s.section = sectp; |
fd361982 | 12371 | sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12372 | } |
12373 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12374 | { | |
12375 | /* There can be only one. */ | |
049412e3 | 12376 | if (sections->loc.s.section != NULL) |
80626a55 | 12377 | return 0; |
049412e3 | 12378 | sections->loc.s.section = sectp; |
fd361982 | 12379 | sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12380 | } |
12381 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12382 | { | |
12383 | /* There can be only one. */ | |
049412e3 | 12384 | if (sections->macinfo.s.section != NULL) |
80626a55 | 12385 | return 0; |
049412e3 | 12386 | sections->macinfo.s.section = sectp; |
fd361982 | 12387 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12388 | } |
12389 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12390 | { | |
12391 | /* There can be only one. */ | |
049412e3 | 12392 | if (sections->macro.s.section != NULL) |
80626a55 | 12393 | return 0; |
049412e3 | 12394 | sections->macro.s.section = sectp; |
fd361982 | 12395 | sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12396 | } |
12397 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12398 | { | |
12399 | /* There can be only one. */ | |
049412e3 | 12400 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 12401 | return 0; |
049412e3 | 12402 | sections->str_offsets.s.section = sectp; |
fd361982 | 12403 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12404 | } |
12405 | else | |
12406 | { | |
12407 | /* No other kind of section is valid. */ | |
12408 | return 0; | |
12409 | } | |
12410 | ||
12411 | return 1; | |
12412 | } | |
12413 | ||
73869dc2 DE |
12414 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
12415 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12416 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12417 | This is for DWP version 1 files. */ | |
80626a55 DE |
12418 | |
12419 | static struct dwo_unit * | |
ed2dc618 SM |
12420 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12421 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12422 | uint32_t unit_index, |
12423 | const char *comp_dir, | |
12424 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
12425 | { |
12426 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
12427 | const struct dwp_hash_table *dwp_htab = |
12428 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12429 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
12430 | const char *kind = is_debug_types ? "TU" : "CU"; |
12431 | struct dwo_file *dwo_file; | |
12432 | struct dwo_unit *dwo_unit; | |
73869dc2 | 12433 | struct virtual_v1_dwo_sections sections; |
80626a55 | 12434 | void **dwo_file_slot; |
80626a55 DE |
12435 | int i; |
12436 | ||
73869dc2 DE |
12437 | gdb_assert (dwp_file->version == 1); |
12438 | ||
b4f54984 | 12439 | if (dwarf_read_debug) |
80626a55 | 12440 | { |
73869dc2 | 12441 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 12442 | kind, |
73869dc2 | 12443 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
12444 | dwp_file->name); |
12445 | } | |
12446 | ||
19ac8c2e | 12447 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
12448 | Put a limit on the number of sections we look for so that bad data |
12449 | doesn't cause us to loop forever. */ | |
12450 | ||
73869dc2 | 12451 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
12452 | (1 /* .debug_info or .debug_types */ \ |
12453 | + 1 /* .debug_abbrev */ \ | |
12454 | + 1 /* .debug_line */ \ | |
12455 | + 1 /* .debug_loc */ \ | |
12456 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 12457 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
12458 | + 1 /* trailing zero */) |
12459 | ||
12460 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 12461 | |
73869dc2 | 12462 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
12463 | { |
12464 | asection *sectp; | |
12465 | uint32_t section_nr = | |
12466 | read_4_bytes (dbfd, | |
73869dc2 DE |
12467 | dwp_htab->section_pool.v1.indices |
12468 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
12469 | |
12470 | if (section_nr == 0) | |
12471 | break; | |
12472 | if (section_nr >= dwp_file->num_sections) | |
12473 | { | |
12474 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
12475 | " [in module %s]"), | |
12476 | dwp_file->name); | |
12477 | } | |
12478 | ||
12479 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 12480 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
12481 | { |
12482 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
12483 | " [in module %s]"), | |
12484 | dwp_file->name); | |
12485 | } | |
12486 | } | |
12487 | ||
12488 | if (i < 2 | |
a32a8923 DE |
12489 | || dwarf2_section_empty_p (§ions.info_or_types) |
12490 | || dwarf2_section_empty_p (§ions.abbrev)) | |
80626a55 DE |
12491 | { |
12492 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
12493 | " [in module %s]"), | |
12494 | dwp_file->name); | |
12495 | } | |
73869dc2 | 12496 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
12497 | { |
12498 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
12499 | " [in module %s]"), | |
12500 | dwp_file->name); | |
12501 | } | |
12502 | ||
12503 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12504 | have dwo_unit "live" in that. At least for now. | |
12505 | ||
12506 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 12507 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
12508 | file, we can combine them back into a virtual DWO file to save space |
12509 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
12510 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
12511 | ||
791afaa2 TT |
12512 | std::string virtual_dwo_name = |
12513 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
12514 | get_section_id (§ions.abbrev), | |
12515 | get_section_id (§ions.line), | |
12516 | get_section_id (§ions.loc), | |
12517 | get_section_id (§ions.str_offsets)); | |
80626a55 | 12518 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12519 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12520 | virtual_dwo_name.c_str (), | |
12521 | comp_dir); | |
80626a55 DE |
12522 | /* Create one if necessary. */ |
12523 | if (*dwo_file_slot == NULL) | |
12524 | { | |
b4f54984 | 12525 | if (dwarf_read_debug) |
80626a55 DE |
12526 | { |
12527 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12528 | virtual_dwo_name.c_str ()); |
80626a55 | 12529 | } |
51ac9db5 | 12530 | dwo_file = new struct dwo_file; |
efba19b0 TT |
12531 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
12532 | virtual_dwo_name); | |
0ac5b59e | 12533 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
12534 | dwo_file->sections.abbrev = sections.abbrev; |
12535 | dwo_file->sections.line = sections.line; | |
12536 | dwo_file->sections.loc = sections.loc; | |
12537 | dwo_file->sections.macinfo = sections.macinfo; | |
12538 | dwo_file->sections.macro = sections.macro; | |
12539 | dwo_file->sections.str_offsets = sections.str_offsets; | |
12540 | /* The "str" section is global to the entire DWP file. */ | |
12541 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 12542 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
12543 | there's no need to record it in dwo_file. |
12544 | Also, we can't simply record type sections in dwo_file because | |
12545 | we record a pointer into the vector in dwo_unit. As we collect more | |
12546 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
12547 | for it, invalidating all copies of pointers into the previous |
12548 | contents. */ | |
80626a55 DE |
12549 | *dwo_file_slot = dwo_file; |
12550 | } | |
12551 | else | |
12552 | { | |
b4f54984 | 12553 | if (dwarf_read_debug) |
80626a55 DE |
12554 | { |
12555 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12556 | virtual_dwo_name.c_str ()); |
80626a55 | 12557 | } |
9a3c8263 | 12558 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 12559 | } |
80626a55 DE |
12560 | |
12561 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12562 | dwo_unit->dwo_file = dwo_file; | |
12563 | dwo_unit->signature = signature; | |
8d749320 SM |
12564 | dwo_unit->section = |
12565 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 12566 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 12567 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
12568 | |
12569 | return dwo_unit; | |
12570 | } | |
12571 | ||
73869dc2 DE |
12572 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
12573 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
12574 | piece within that section used by a TU/CU, return a virtual section | |
12575 | of just that piece. */ | |
12576 | ||
12577 | static struct dwarf2_section_info | |
ed2dc618 SM |
12578 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12579 | struct dwarf2_section_info *section, | |
73869dc2 DE |
12580 | bfd_size_type offset, bfd_size_type size) |
12581 | { | |
12582 | struct dwarf2_section_info result; | |
12583 | asection *sectp; | |
12584 | ||
12585 | gdb_assert (section != NULL); | |
12586 | gdb_assert (!section->is_virtual); | |
12587 | ||
12588 | memset (&result, 0, sizeof (result)); | |
12589 | result.s.containing_section = section; | |
dc4ccb6f | 12590 | result.is_virtual = true; |
73869dc2 DE |
12591 | |
12592 | if (size == 0) | |
12593 | return result; | |
12594 | ||
12595 | sectp = get_section_bfd_section (section); | |
12596 | ||
12597 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
12598 | bounds of the real section. This is a pretty-rare event, so just | |
12599 | flag an error (easier) instead of a warning and trying to cope. */ | |
12600 | if (sectp == NULL | |
fd361982 | 12601 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 12602 | { |
73869dc2 DE |
12603 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
12604 | " in section %s [in module %s]"), | |
fd361982 | 12605 | sectp ? bfd_section_name (sectp) : "<unknown>", |
73869dc2 DE |
12606 | objfile_name (dwarf2_per_objfile->objfile)); |
12607 | } | |
12608 | ||
12609 | result.virtual_offset = offset; | |
12610 | result.size = size; | |
12611 | return result; | |
12612 | } | |
12613 | ||
12614 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
12615 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
12616 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
12617 | This is for DWP version 2 files. */ | |
12618 | ||
12619 | static struct dwo_unit * | |
ed2dc618 SM |
12620 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12621 | struct dwp_file *dwp_file, | |
73869dc2 DE |
12622 | uint32_t unit_index, |
12623 | const char *comp_dir, | |
12624 | ULONGEST signature, int is_debug_types) | |
12625 | { | |
12626 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
12627 | const struct dwp_hash_table *dwp_htab = | |
12628 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12629 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
12630 | const char *kind = is_debug_types ? "TU" : "CU"; |
12631 | struct dwo_file *dwo_file; | |
12632 | struct dwo_unit *dwo_unit; | |
12633 | struct virtual_v2_dwo_sections sections; | |
12634 | void **dwo_file_slot; | |
73869dc2 DE |
12635 | int i; |
12636 | ||
12637 | gdb_assert (dwp_file->version == 2); | |
12638 | ||
b4f54984 | 12639 | if (dwarf_read_debug) |
73869dc2 DE |
12640 | { |
12641 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
12642 | kind, | |
12643 | pulongest (unit_index), hex_string (signature), | |
12644 | dwp_file->name); | |
12645 | } | |
12646 | ||
12647 | /* Fetch the section offsets of this DWO unit. */ | |
12648 | ||
12649 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
12650 | |
12651 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
12652 | { | |
12653 | uint32_t offset = read_4_bytes (dbfd, | |
12654 | dwp_htab->section_pool.v2.offsets | |
12655 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12656 | + i) | |
12657 | * sizeof (uint32_t))); | |
12658 | uint32_t size = read_4_bytes (dbfd, | |
12659 | dwp_htab->section_pool.v2.sizes | |
12660 | + (((unit_index - 1) * dwp_htab->nr_columns | |
12661 | + i) | |
12662 | * sizeof (uint32_t))); | |
12663 | ||
12664 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
12665 | { | |
12666 | case DW_SECT_INFO: | |
12667 | case DW_SECT_TYPES: | |
12668 | sections.info_or_types_offset = offset; | |
12669 | sections.info_or_types_size = size; | |
12670 | break; | |
12671 | case DW_SECT_ABBREV: | |
12672 | sections.abbrev_offset = offset; | |
12673 | sections.abbrev_size = size; | |
12674 | break; | |
12675 | case DW_SECT_LINE: | |
12676 | sections.line_offset = offset; | |
12677 | sections.line_size = size; | |
12678 | break; | |
12679 | case DW_SECT_LOC: | |
12680 | sections.loc_offset = offset; | |
12681 | sections.loc_size = size; | |
12682 | break; | |
12683 | case DW_SECT_STR_OFFSETS: | |
12684 | sections.str_offsets_offset = offset; | |
12685 | sections.str_offsets_size = size; | |
12686 | break; | |
12687 | case DW_SECT_MACINFO: | |
12688 | sections.macinfo_offset = offset; | |
12689 | sections.macinfo_size = size; | |
12690 | break; | |
12691 | case DW_SECT_MACRO: | |
12692 | sections.macro_offset = offset; | |
12693 | sections.macro_size = size; | |
12694 | break; | |
12695 | } | |
12696 | } | |
12697 | ||
12698 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
12699 | have dwo_unit "live" in that. At least for now. | |
12700 | ||
12701 | The DWP file can be made up of a random collection of CUs and TUs. | |
12702 | However, for each CU + set of TUs that came from the same original DWO | |
12703 | file, we can combine them back into a virtual DWO file to save space | |
12704 | (fewer struct dwo_file objects to allocate). Remember that for really | |
12705 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
12706 | ||
791afaa2 TT |
12707 | std::string virtual_dwo_name = |
12708 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
12709 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
12710 | (long) (sections.line_size ? sections.line_offset : 0), | |
12711 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
12712 | (long) (sections.str_offsets_size | |
12713 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 12714 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
12715 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12716 | virtual_dwo_name.c_str (), | |
12717 | comp_dir); | |
73869dc2 DE |
12718 | /* Create one if necessary. */ |
12719 | if (*dwo_file_slot == NULL) | |
12720 | { | |
b4f54984 | 12721 | if (dwarf_read_debug) |
73869dc2 DE |
12722 | { |
12723 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 12724 | virtual_dwo_name.c_str ()); |
73869dc2 | 12725 | } |
51ac9db5 | 12726 | dwo_file = new struct dwo_file; |
efba19b0 TT |
12727 | dwo_file->dwo_name = obstack_strdup (&objfile->objfile_obstack, |
12728 | virtual_dwo_name); | |
73869dc2 DE |
12729 | dwo_file->comp_dir = comp_dir; |
12730 | dwo_file->sections.abbrev = | |
ed2dc618 | 12731 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
12732 | sections.abbrev_offset, sections.abbrev_size); |
12733 | dwo_file->sections.line = | |
ed2dc618 | 12734 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
12735 | sections.line_offset, sections.line_size); |
12736 | dwo_file->sections.loc = | |
ed2dc618 | 12737 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
12738 | sections.loc_offset, sections.loc_size); |
12739 | dwo_file->sections.macinfo = | |
ed2dc618 | 12740 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
12741 | sections.macinfo_offset, sections.macinfo_size); |
12742 | dwo_file->sections.macro = | |
ed2dc618 | 12743 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
12744 | sections.macro_offset, sections.macro_size); |
12745 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
12746 | create_dwp_v2_section (dwarf2_per_objfile, |
12747 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
12748 | sections.str_offsets_offset, |
12749 | sections.str_offsets_size); | |
12750 | /* The "str" section is global to the entire DWP file. */ | |
12751 | dwo_file->sections.str = dwp_file->sections.str; | |
12752 | /* The info or types section is assigned below to dwo_unit, | |
12753 | there's no need to record it in dwo_file. | |
12754 | Also, we can't simply record type sections in dwo_file because | |
12755 | we record a pointer into the vector in dwo_unit. As we collect more | |
12756 | types we'll grow the vector and eventually have to reallocate space | |
12757 | for it, invalidating all copies of pointers into the previous | |
12758 | contents. */ | |
12759 | *dwo_file_slot = dwo_file; | |
12760 | } | |
12761 | else | |
12762 | { | |
b4f54984 | 12763 | if (dwarf_read_debug) |
73869dc2 DE |
12764 | { |
12765 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 12766 | virtual_dwo_name.c_str ()); |
73869dc2 | 12767 | } |
9a3c8263 | 12768 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 12769 | } |
73869dc2 DE |
12770 | |
12771 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
12772 | dwo_unit->dwo_file = dwo_file; | |
12773 | dwo_unit->signature = signature; | |
8d749320 SM |
12774 | dwo_unit->section = |
12775 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
12776 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
12777 | is_debug_types | |
73869dc2 DE |
12778 | ? &dwp_file->sections.types |
12779 | : &dwp_file->sections.info, | |
12780 | sections.info_or_types_offset, | |
12781 | sections.info_or_types_size); | |
12782 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
12783 | ||
12784 | return dwo_unit; | |
12785 | } | |
12786 | ||
57d63ce2 DE |
12787 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
12788 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
12789 | |
12790 | static struct dwo_unit * | |
ed2dc618 SM |
12791 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12792 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 12793 | ULONGEST signature, int is_debug_types) |
80626a55 | 12794 | { |
57d63ce2 DE |
12795 | const struct dwp_hash_table *dwp_htab = |
12796 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 12797 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 12798 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
12799 | uint32_t hash = signature & mask; |
12800 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
12801 | unsigned int i; | |
12802 | void **slot; | |
870f88f7 | 12803 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
12804 | |
12805 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
12806 | find_dwo_cu.signature = signature; | |
19ac8c2e DE |
12807 | slot = htab_find_slot (is_debug_types |
12808 | ? dwp_file->loaded_tus | |
12809 | : dwp_file->loaded_cus, | |
12810 | &find_dwo_cu, INSERT); | |
80626a55 DE |
12811 | |
12812 | if (*slot != NULL) | |
9a3c8263 | 12813 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12814 | |
12815 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 12816 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
12817 | { |
12818 | ULONGEST signature_in_table; | |
12819 | ||
12820 | signature_in_table = | |
57d63ce2 | 12821 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
12822 | if (signature_in_table == signature) |
12823 | { | |
57d63ce2 DE |
12824 | uint32_t unit_index = |
12825 | read_4_bytes (dbfd, | |
12826 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 12827 | |
73869dc2 DE |
12828 | if (dwp_file->version == 1) |
12829 | { | |
ed2dc618 SM |
12830 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
12831 | dwp_file, unit_index, | |
73869dc2 DE |
12832 | comp_dir, signature, |
12833 | is_debug_types); | |
12834 | } | |
12835 | else | |
12836 | { | |
ed2dc618 SM |
12837 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
12838 | dwp_file, unit_index, | |
73869dc2 DE |
12839 | comp_dir, signature, |
12840 | is_debug_types); | |
12841 | } | |
9a3c8263 | 12842 | return (struct dwo_unit *) *slot; |
80626a55 DE |
12843 | } |
12844 | if (signature_in_table == 0) | |
12845 | return NULL; | |
12846 | hash = (hash + hash2) & mask; | |
12847 | } | |
12848 | ||
12849 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
12850 | " [in module %s]"), | |
12851 | dwp_file->name); | |
12852 | } | |
12853 | ||
ab5088bf | 12854 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
12855 | Open the file specified by FILE_NAME and hand it off to BFD for |
12856 | preliminary analysis. Return a newly initialized bfd *, which | |
12857 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12858 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12859 | SEARCH_CWD is true if the current directory is to be searched. |
12860 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12861 | If successful, the file is added to the bfd include table of the |
12862 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12863 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12864 | NOTE: This function is derived from symfile_bfd_open. */ |
12865 | ||
192b62ce | 12866 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12867 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12868 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12869 | { |
24b9144d | 12870 | int desc; |
9c02c129 DE |
12871 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12872 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12873 | to debug_file_directory. */ | |
e0cc99a6 | 12874 | const char *search_path; |
9c02c129 DE |
12875 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12876 | ||
e0cc99a6 | 12877 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12878 | if (search_cwd) |
12879 | { | |
12880 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12881 | { |
12882 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12883 | debug_file_directory, | |
12884 | (char *) NULL)); | |
12885 | search_path = search_path_holder.get (); | |
12886 | } | |
6ac97d4c | 12887 | else |
e0cc99a6 | 12888 | search_path = "."; |
6ac97d4c | 12889 | } |
9c02c129 | 12890 | else |
e0cc99a6 | 12891 | search_path = debug_file_directory; |
3019eac3 | 12892 | |
24b9144d | 12893 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12894 | if (is_dwp) |
12895 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12896 | |
12897 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12898 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12899 | O_RDONLY | O_BINARY, &absolute_name); |
12900 | if (desc < 0) | |
12901 | return NULL; | |
12902 | ||
e0cc99a6 TT |
12903 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12904 | gnutarget, desc)); | |
9c02c129 DE |
12905 | if (sym_bfd == NULL) |
12906 | return NULL; | |
192b62ce | 12907 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12908 | |
192b62ce TT |
12909 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12910 | return NULL; | |
3019eac3 | 12911 | |
13aaf454 DE |
12912 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12913 | This is important because things like demangled_names_hash lives in the | |
12914 | objfile's per_bfd space and may have references to things like symbol | |
12915 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12916 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12917 | |
3019eac3 DE |
12918 | return sym_bfd; |
12919 | } | |
12920 | ||
ab5088bf | 12921 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12922 | COMP_DIR is the DW_AT_comp_dir attribute. |
12923 | The result is the bfd handle of the file. | |
12924 | If there is a problem finding or opening the file, return NULL. | |
12925 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12926 | same as symfile_bfd_open. */ | |
12927 | ||
192b62ce | 12928 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12929 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12930 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12931 | { |
80626a55 | 12932 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12933 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12934 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12935 | |
12936 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12937 | ||
12938 | if (comp_dir != NULL) | |
12939 | { | |
43816ebc TT |
12940 | gdb::unique_xmalloc_ptr<char> path_to_try |
12941 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12942 | |
12943 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12944 | search path, which seems useful. */ | |
ed2dc618 | 12945 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
43816ebc | 12946 | path_to_try.get (), |
ed2dc618 | 12947 | 0 /*is_dwp*/, |
192b62ce | 12948 | 1 /*search_cwd*/)); |
3019eac3 DE |
12949 | if (abfd != NULL) |
12950 | return abfd; | |
12951 | } | |
12952 | ||
12953 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12954 | is a list of paths. */ | |
12955 | ||
12956 | if (*debug_file_directory == '\0') | |
12957 | return NULL; | |
12958 | ||
ed2dc618 SM |
12959 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12960 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12961 | } |
12962 | ||
80626a55 DE |
12963 | /* This function is mapped across the sections and remembers the offset and |
12964 | size of each of the DWO debugging sections we are interested in. */ | |
12965 | ||
12966 | static void | |
12967 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12968 | { | |
9a3c8263 | 12969 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12970 | const struct dwop_section_names *names = &dwop_section_names; |
12971 | ||
12972 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12973 | { | |
049412e3 | 12974 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12975 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12976 | } |
12977 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12978 | { | |
049412e3 | 12979 | dwo_sections->info.s.section = sectp; |
fd361982 | 12980 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 DE |
12981 | } |
12982 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12983 | { | |
049412e3 | 12984 | dwo_sections->line.s.section = sectp; |
fd361982 | 12985 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12986 | } |
12987 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12988 | { | |
049412e3 | 12989 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12990 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12991 | } |
12992 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12993 | { | |
049412e3 | 12994 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12995 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12996 | } |
12997 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12998 | { | |
049412e3 | 12999 | dwo_sections->macro.s.section = sectp; |
fd361982 | 13000 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
13001 | } |
13002 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
13003 | { | |
049412e3 | 13004 | dwo_sections->str.s.section = sectp; |
fd361982 | 13005 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 DE |
13006 | } |
13007 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
13008 | { | |
049412e3 | 13009 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 13010 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
13011 | } |
13012 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13013 | { | |
13014 | struct dwarf2_section_info type_section; | |
13015 | ||
13016 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 13017 | type_section.s.section = sectp; |
fd361982 | 13018 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 13019 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
13020 | } |
13021 | } | |
13022 | ||
ab5088bf | 13023 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 13024 | by PER_CU. This is for the non-DWP case. |
80626a55 | 13025 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
13026 | |
13027 | static struct dwo_file * | |
0ac5b59e DE |
13028 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
13029 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 13030 | { |
ed2dc618 | 13031 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 13032 | |
fb1eb2f9 | 13033 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
13034 | if (dbfd == NULL) |
13035 | { | |
b4f54984 | 13036 | if (dwarf_read_debug) |
80626a55 DE |
13037 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
13038 | return NULL; | |
13039 | } | |
263db9a1 | 13040 | |
51ac9db5 | 13041 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
13042 | dwo_file->dwo_name = dwo_name; |
13043 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 13044 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 13045 | |
fb1eb2f9 | 13046 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 13047 | &dwo_file->sections); |
3019eac3 | 13048 | |
ed2dc618 SM |
13049 | create_cus_hash_table (dwarf2_per_objfile, *dwo_file, dwo_file->sections.info, |
13050 | dwo_file->cus); | |
3019eac3 | 13051 | |
263db9a1 | 13052 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 13053 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 13054 | |
b4f54984 | 13055 | if (dwarf_read_debug) |
80626a55 DE |
13056 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
13057 | ||
263db9a1 | 13058 | return dwo_file.release (); |
3019eac3 DE |
13059 | } |
13060 | ||
80626a55 | 13061 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
13062 | size of each of the DWP debugging sections common to version 1 and 2 that |
13063 | we are interested in. */ | |
3019eac3 | 13064 | |
80626a55 | 13065 | static void |
73869dc2 DE |
13066 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
13067 | void *dwp_file_ptr) | |
3019eac3 | 13068 | { |
9a3c8263 | 13069 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
13070 | const struct dwop_section_names *names = &dwop_section_names; |
13071 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 13072 | |
80626a55 | 13073 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 13074 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
13075 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
13076 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 13077 | |
80626a55 DE |
13078 | /* Look for specific sections that we need. */ |
13079 | if (section_is_p (sectp->name, &names->str_dwo)) | |
13080 | { | |
049412e3 | 13081 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 13082 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 DE |
13083 | } |
13084 | else if (section_is_p (sectp->name, &names->cu_index)) | |
13085 | { | |
049412e3 | 13086 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 13087 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 DE |
13088 | } |
13089 | else if (section_is_p (sectp->name, &names->tu_index)) | |
13090 | { | |
049412e3 | 13091 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 13092 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
13093 | } |
13094 | } | |
3019eac3 | 13095 | |
73869dc2 DE |
13096 | /* This function is mapped across the sections and remembers the offset and |
13097 | size of each of the DWP version 2 debugging sections that we are interested | |
13098 | in. This is split into a separate function because we don't know if we | |
13099 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
13100 | ||
13101 | static void | |
13102 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
13103 | { | |
9a3c8263 | 13104 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
13105 | const struct dwop_section_names *names = &dwop_section_names; |
13106 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
13107 | ||
13108 | /* Record the ELF section number for later lookup: this is what the | |
13109 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
13110 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
13111 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
13112 | ||
13113 | /* Look for specific sections that we need. */ | |
13114 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
13115 | { | |
049412e3 | 13116 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 13117 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 DE |
13118 | } |
13119 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
13120 | { | |
049412e3 | 13121 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 13122 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 DE |
13123 | } |
13124 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
13125 | { | |
049412e3 | 13126 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 13127 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 DE |
13128 | } |
13129 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
13130 | { | |
049412e3 | 13131 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 13132 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 DE |
13133 | } |
13134 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
13135 | { | |
049412e3 | 13136 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 13137 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 DE |
13138 | } |
13139 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
13140 | { | |
049412e3 | 13141 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 13142 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 DE |
13143 | } |
13144 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
13145 | { | |
049412e3 | 13146 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 13147 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 DE |
13148 | } |
13149 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
13150 | { | |
049412e3 | 13151 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 13152 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
13153 | } |
13154 | } | |
13155 | ||
80626a55 | 13156 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13157 | |
80626a55 DE |
13158 | static hashval_t |
13159 | hash_dwp_loaded_cutus (const void *item) | |
13160 | { | |
9a3c8263 | 13161 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 13162 | |
80626a55 DE |
13163 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
13164 | return dwo_unit->signature; | |
3019eac3 DE |
13165 | } |
13166 | ||
80626a55 | 13167 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13168 | |
80626a55 DE |
13169 | static int |
13170 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 13171 | { |
9a3c8263 SM |
13172 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
13173 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 13174 | |
80626a55 DE |
13175 | return dua->signature == dub->signature; |
13176 | } | |
3019eac3 | 13177 | |
80626a55 | 13178 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 13179 | |
80626a55 DE |
13180 | static htab_t |
13181 | allocate_dwp_loaded_cutus_table (struct objfile *objfile) | |
13182 | { | |
13183 | return htab_create_alloc_ex (3, | |
13184 | hash_dwp_loaded_cutus, | |
13185 | eq_dwp_loaded_cutus, | |
13186 | NULL, | |
13187 | &objfile->objfile_obstack, | |
13188 | hashtab_obstack_allocate, | |
13189 | dummy_obstack_deallocate); | |
13190 | } | |
3019eac3 | 13191 | |
ab5088bf DE |
13192 | /* Try to open DWP file FILE_NAME. |
13193 | The result is the bfd handle of the file. | |
13194 | If there is a problem finding or opening the file, return NULL. | |
13195 | Upon success, the canonicalized path of the file is stored in the bfd, | |
13196 | same as symfile_bfd_open. */ | |
13197 | ||
192b62ce | 13198 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
13199 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
13200 | const char *file_name) | |
ab5088bf | 13201 | { |
ed2dc618 SM |
13202 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
13203 | 1 /*is_dwp*/, | |
192b62ce | 13204 | 1 /*search_cwd*/)); |
6ac97d4c DE |
13205 | if (abfd != NULL) |
13206 | return abfd; | |
13207 | ||
13208 | /* Work around upstream bug 15652. | |
13209 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
13210 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
13211 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
13212 | of the executable's path may have discarded the needed info. | |
13213 | [IWBN if the dwp file name was recorded in the executable, akin to | |
13214 | .gnu_debuglink, but that doesn't exist yet.] | |
13215 | Strip the directory from FILE_NAME and search again. */ | |
13216 | if (*debug_file_directory != '\0') | |
13217 | { | |
13218 | /* Don't implicitly search the current directory here. | |
13219 | If the user wants to search "." to handle this case, | |
13220 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
13221 | return try_open_dwop_file (dwarf2_per_objfile, |
13222 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
13223 | 0 /*search_cwd*/); |
13224 | } | |
13225 | ||
13226 | return NULL; | |
ab5088bf DE |
13227 | } |
13228 | ||
80626a55 DE |
13229 | /* Initialize the use of the DWP file for the current objfile. |
13230 | By convention the name of the DWP file is ${objfile}.dwp. | |
13231 | The result is NULL if it can't be found. */ | |
a766d390 | 13232 | |
400174b1 | 13233 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 13234 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
13235 | { |
13236 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 13237 | |
82bf32bc JK |
13238 | /* Try to find first .dwp for the binary file before any symbolic links |
13239 | resolving. */ | |
6c447423 DE |
13240 | |
13241 | /* If the objfile is a debug file, find the name of the real binary | |
13242 | file and get the name of dwp file from there. */ | |
d721ba37 | 13243 | std::string dwp_name; |
6c447423 DE |
13244 | if (objfile->separate_debug_objfile_backlink != NULL) |
13245 | { | |
13246 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
13247 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 13248 | |
d721ba37 | 13249 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
13250 | } |
13251 | else | |
d721ba37 PA |
13252 | dwp_name = objfile->original_name; |
13253 | ||
13254 | dwp_name += ".dwp"; | |
80626a55 | 13255 | |
ed2dc618 | 13256 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
13257 | if (dbfd == NULL |
13258 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
13259 | { | |
13260 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
13261 | dwp_name = objfile_name (objfile); |
13262 | dwp_name += ".dwp"; | |
ed2dc618 | 13263 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
13264 | } |
13265 | ||
80626a55 DE |
13266 | if (dbfd == NULL) |
13267 | { | |
b4f54984 | 13268 | if (dwarf_read_debug) |
d721ba37 | 13269 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 13270 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 13271 | } |
400174b1 TT |
13272 | |
13273 | const char *name = bfd_get_filename (dbfd.get ()); | |
13274 | std::unique_ptr<struct dwp_file> dwp_file | |
13275 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 13276 | |
0a0f4c01 | 13277 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
13278 | dwp_file->elf_sections = |
13279 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
13280 | dwp_file->num_sections, asection *); | |
13281 | ||
400174b1 TT |
13282 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13283 | dwarf2_locate_common_dwp_sections, | |
13284 | dwp_file.get ()); | |
80626a55 | 13285 | |
400174b1 TT |
13286 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13287 | 0); | |
80626a55 | 13288 | |
400174b1 TT |
13289 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
13290 | 1); | |
80626a55 | 13291 | |
73869dc2 | 13292 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
13293 | if (dwp_file->cus && dwp_file->tus |
13294 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
13295 | { |
13296 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 13297 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 13298 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
13299 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
13300 | " TU version %s [in DWP file %s]"), | |
13301 | pulongest (dwp_file->cus->version), | |
d721ba37 | 13302 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 13303 | } |
08302ed2 DE |
13304 | |
13305 | if (dwp_file->cus) | |
13306 | dwp_file->version = dwp_file->cus->version; | |
13307 | else if (dwp_file->tus) | |
13308 | dwp_file->version = dwp_file->tus->version; | |
13309 | else | |
13310 | dwp_file->version = 2; | |
73869dc2 DE |
13311 | |
13312 | if (dwp_file->version == 2) | |
400174b1 TT |
13313 | bfd_map_over_sections (dwp_file->dbfd.get (), |
13314 | dwarf2_locate_v2_dwp_sections, | |
13315 | dwp_file.get ()); | |
73869dc2 | 13316 | |
19ac8c2e DE |
13317 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (objfile); |
13318 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (objfile); | |
80626a55 | 13319 | |
b4f54984 | 13320 | if (dwarf_read_debug) |
80626a55 DE |
13321 | { |
13322 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
13323 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
13324 | " %s CUs, %s TUs\n", |
13325 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
13326 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
13327 | } |
13328 | ||
13329 | return dwp_file; | |
3019eac3 | 13330 | } |
c906108c | 13331 | |
ab5088bf DE |
13332 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
13333 | ||
13334 | static struct dwp_file * | |
ed2dc618 | 13335 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
13336 | { |
13337 | if (! dwarf2_per_objfile->dwp_checked) | |
13338 | { | |
ed2dc618 SM |
13339 | dwarf2_per_objfile->dwp_file |
13340 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
13341 | dwarf2_per_objfile->dwp_checked = 1; |
13342 | } | |
400174b1 | 13343 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
13344 | } |
13345 | ||
80626a55 DE |
13346 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
13347 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
13348 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 13349 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
13350 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
13351 | ||
13352 | This is called, for example, when wanting to read a variable with a | |
13353 | complex location. Therefore we don't want to do file i/o for every call. | |
13354 | Therefore we don't want to look for a DWO file on every call. | |
13355 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
13356 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
13357 | for a DWO file. | |
13358 | ||
1c658ad5 | 13359 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 13360 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 13361 | |
3019eac3 | 13362 | static struct dwo_unit * |
80626a55 DE |
13363 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
13364 | const char *dwo_name, const char *comp_dir, | |
13365 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 13366 | { |
ed2dc618 | 13367 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 13368 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
13369 | const char *kind = is_debug_types ? "TU" : "CU"; |
13370 | void **dwo_file_slot; | |
3019eac3 | 13371 | struct dwo_file *dwo_file; |
80626a55 | 13372 | struct dwp_file *dwp_file; |
cb1df416 | 13373 | |
6a506a2d DE |
13374 | /* First see if there's a DWP file. |
13375 | If we have a DWP file but didn't find the DWO inside it, don't | |
13376 | look for the original DWO file. It makes gdb behave differently | |
13377 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 13378 | |
ed2dc618 | 13379 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 13380 | if (dwp_file != NULL) |
cf2c3c16 | 13381 | { |
80626a55 DE |
13382 | const struct dwp_hash_table *dwp_htab = |
13383 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
13384 | ||
13385 | if (dwp_htab != NULL) | |
13386 | { | |
13387 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 13388 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 13389 | signature, is_debug_types); |
80626a55 DE |
13390 | |
13391 | if (dwo_cutu != NULL) | |
13392 | { | |
b4f54984 | 13393 | if (dwarf_read_debug) |
80626a55 DE |
13394 | { |
13395 | fprintf_unfiltered (gdb_stdlog, | |
13396 | "Virtual DWO %s %s found: @%s\n", | |
13397 | kind, hex_string (signature), | |
13398 | host_address_to_string (dwo_cutu)); | |
13399 | } | |
13400 | return dwo_cutu; | |
13401 | } | |
13402 | } | |
13403 | } | |
6a506a2d | 13404 | else |
80626a55 | 13405 | { |
6a506a2d | 13406 | /* No DWP file, look for the DWO file. */ |
80626a55 | 13407 | |
ed2dc618 SM |
13408 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
13409 | dwo_name, comp_dir); | |
6a506a2d | 13410 | if (*dwo_file_slot == NULL) |
80626a55 | 13411 | { |
6a506a2d DE |
13412 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
13413 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 13414 | } |
6a506a2d | 13415 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 13416 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 13417 | |
6a506a2d | 13418 | if (dwo_file != NULL) |
19c3d4c9 | 13419 | { |
6a506a2d DE |
13420 | struct dwo_unit *dwo_cutu = NULL; |
13421 | ||
13422 | if (is_debug_types && dwo_file->tus) | |
13423 | { | |
13424 | struct dwo_unit find_dwo_cutu; | |
13425 | ||
13426 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13427 | find_dwo_cutu.signature = signature; | |
9a3c8263 SM |
13428 | dwo_cutu |
13429 | = (struct dwo_unit *) htab_find (dwo_file->tus, &find_dwo_cutu); | |
6a506a2d | 13430 | } |
33c5cd75 | 13431 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 13432 | { |
33c5cd75 DB |
13433 | struct dwo_unit find_dwo_cutu; |
13434 | ||
13435 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
13436 | find_dwo_cutu.signature = signature; | |
13437 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus, | |
13438 | &find_dwo_cutu); | |
6a506a2d DE |
13439 | } |
13440 | ||
13441 | if (dwo_cutu != NULL) | |
13442 | { | |
b4f54984 | 13443 | if (dwarf_read_debug) |
6a506a2d DE |
13444 | { |
13445 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
13446 | kind, dwo_name, hex_string (signature), | |
13447 | host_address_to_string (dwo_cutu)); | |
13448 | } | |
13449 | return dwo_cutu; | |
80626a55 DE |
13450 | } |
13451 | } | |
2e276125 | 13452 | } |
9cdd5dbd | 13453 | |
80626a55 DE |
13454 | /* We didn't find it. This could mean a dwo_id mismatch, or |
13455 | someone deleted the DWO/DWP file, or the search path isn't set up | |
13456 | correctly to find the file. */ | |
13457 | ||
b4f54984 | 13458 | if (dwarf_read_debug) |
80626a55 DE |
13459 | { |
13460 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
13461 | kind, dwo_name, hex_string (signature)); | |
13462 | } | |
3019eac3 | 13463 | |
6656a72d DE |
13464 | /* This is a warning and not a complaint because it can be caused by |
13465 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
13466 | { |
13467 | /* Print the name of the DWP file if we looked there, helps the user | |
13468 | better diagnose the problem. */ | |
791afaa2 | 13469 | std::string dwp_text; |
43942612 DE |
13470 | |
13471 | if (dwp_file != NULL) | |
791afaa2 TT |
13472 | dwp_text = string_printf (" [in DWP file %s]", |
13473 | lbasename (dwp_file->name)); | |
43942612 | 13474 | |
9d8780f0 | 13475 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
13476 | " [in module %s]"), |
13477 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 13478 | dwp_text.c_str (), |
43942612 | 13479 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 13480 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 13481 | } |
3019eac3 | 13482 | return NULL; |
5fb290d7 DJ |
13483 | } |
13484 | ||
80626a55 DE |
13485 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
13486 | See lookup_dwo_cutu_unit for details. */ | |
13487 | ||
13488 | static struct dwo_unit * | |
13489 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
13490 | const char *dwo_name, const char *comp_dir, | |
13491 | ULONGEST signature) | |
13492 | { | |
13493 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
13494 | } | |
13495 | ||
13496 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
13497 | See lookup_dwo_cutu_unit for details. */ | |
13498 | ||
13499 | static struct dwo_unit * | |
13500 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
13501 | const char *dwo_name, const char *comp_dir) | |
13502 | { | |
13503 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
13504 | } | |
13505 | ||
89e63ee4 DE |
13506 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
13507 | ||
13508 | static int | |
13509 | queue_and_load_dwo_tu (void **slot, void *info) | |
13510 | { | |
13511 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
13512 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
13513 | ULONGEST signature = dwo_unit->signature; | |
13514 | struct signatured_type *sig_type = | |
13515 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
13516 | ||
13517 | if (sig_type != NULL) | |
13518 | { | |
13519 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
13520 | ||
13521 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
13522 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
13523 | while processing PER_CU. */ | |
13524 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
13525 | load_full_type_unit (sig_cu); | |
ae640021 | 13526 | per_cu->imported_symtabs_push (sig_cu); |
89e63ee4 DE |
13527 | } |
13528 | ||
13529 | return 1; | |
13530 | } | |
13531 | ||
13532 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
13533 | The DWO may have the only definition of the type, though it may not be | |
13534 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
13535 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
13536 | ||
13537 | static void | |
13538 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
13539 | { | |
13540 | struct dwo_unit *dwo_unit; | |
13541 | struct dwo_file *dwo_file; | |
13542 | ||
13543 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 13544 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
13545 | gdb_assert (per_cu->cu != NULL); |
13546 | ||
13547 | dwo_unit = per_cu->cu->dwo_unit; | |
13548 | gdb_assert (dwo_unit != NULL); | |
13549 | ||
13550 | dwo_file = dwo_unit->dwo_file; | |
13551 | if (dwo_file->tus != NULL) | |
13552 | htab_traverse_noresize (dwo_file->tus, queue_and_load_dwo_tu, per_cu); | |
13553 | } | |
13554 | ||
3019eac3 | 13555 | /* Read in various DIEs. */ |
348e048f | 13556 | |
d389af10 | 13557 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
13558 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
13559 | already referenced by DW_AT_abstract_origin from the children of the | |
13560 | current DIE. */ | |
d389af10 JK |
13561 | |
13562 | static void | |
13563 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
13564 | { | |
13565 | struct die_info *child_die; | |
791afaa2 | 13566 | sect_offset *offsetp; |
d389af10 JK |
13567 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
13568 | struct die_info *origin_die; | |
13569 | /* Iterator of the ORIGIN_DIE children. */ | |
13570 | struct die_info *origin_child_die; | |
d389af10 | 13571 | struct attribute *attr; |
cd02d79d PA |
13572 | struct dwarf2_cu *origin_cu; |
13573 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
13574 | |
13575 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13576 | if (!attr) | |
13577 | return; | |
13578 | ||
cd02d79d PA |
13579 | /* Note that following die references may follow to a die in a |
13580 | different cu. */ | |
13581 | ||
13582 | origin_cu = cu; | |
13583 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
13584 | ||
13585 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
13586 | symbols in. */ | |
13587 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
13588 | origin_cu->list_in_scope = cu->list_in_scope; | |
13589 | ||
edb3359d DJ |
13590 | if (die->tag != origin_die->tag |
13591 | && !(die->tag == DW_TAG_inlined_subroutine | |
13592 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13593 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
13594 | sect_offset_str (die->sect_off), |
13595 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 13596 | |
791afaa2 | 13597 | std::vector<sect_offset> offsets; |
d389af10 | 13598 | |
3ea89b92 PMR |
13599 | for (child_die = die->child; |
13600 | child_die && child_die->tag; | |
13601 | child_die = sibling_die (child_die)) | |
13602 | { | |
13603 | struct die_info *child_origin_die; | |
13604 | struct dwarf2_cu *child_origin_cu; | |
13605 | ||
13606 | /* We are trying to process concrete instance entries: | |
216f72a1 | 13607 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
13608 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
13609 | present in the abstract instance but not referenced in the concrete | |
13610 | one. */ | |
216f72a1 JK |
13611 | if (child_die->tag == DW_TAG_call_site |
13612 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
13613 | continue; |
13614 | ||
c38f313d DJ |
13615 | /* For each CHILD_DIE, find the corresponding child of |
13616 | ORIGIN_DIE. If there is more than one layer of | |
13617 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
13618 | but GCC versions at least through 4.4 generate this (GCC PR | |
13619 | 40573). */ | |
3ea89b92 PMR |
13620 | child_origin_die = child_die; |
13621 | child_origin_cu = cu; | |
c38f313d DJ |
13622 | while (1) |
13623 | { | |
cd02d79d PA |
13624 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
13625 | child_origin_cu); | |
c38f313d DJ |
13626 | if (attr == NULL) |
13627 | break; | |
cd02d79d PA |
13628 | child_origin_die = follow_die_ref (child_origin_die, attr, |
13629 | &child_origin_cu); | |
c38f313d DJ |
13630 | } |
13631 | ||
d389af10 JK |
13632 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
13633 | counterpart may exist. */ | |
c38f313d | 13634 | if (child_origin_die != child_die) |
d389af10 | 13635 | { |
edb3359d DJ |
13636 | if (child_die->tag != child_origin_die->tag |
13637 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
13638 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 13639 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13640 | "different tags"), |
9d8780f0 SM |
13641 | sect_offset_str (child_die->sect_off), |
13642 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13643 | if (child_origin_die->parent != origin_die) |
b98664d3 | 13644 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 13645 | "different parents"), |
9d8780f0 SM |
13646 | sect_offset_str (child_die->sect_off), |
13647 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 13648 | else |
791afaa2 | 13649 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 13650 | } |
d389af10 | 13651 | } |
791afaa2 TT |
13652 | std::sort (offsets.begin (), offsets.end ()); |
13653 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
13654 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 13655 | if (offsetp[-1] == *offsetp) |
b98664d3 | 13656 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
13657 | "to DIE %s as their abstract origin"), |
13658 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 13659 | |
791afaa2 | 13660 | offsetp = offsets.data (); |
d389af10 JK |
13661 | origin_child_die = origin_die->child; |
13662 | while (origin_child_die && origin_child_die->tag) | |
13663 | { | |
13664 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 13665 | while (offsetp < offsets_end |
9c541725 | 13666 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 13667 | offsetp++; |
b64f50a1 | 13668 | if (offsetp >= offsets_end |
9c541725 | 13669 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 13670 | { |
adde2bff DE |
13671 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
13672 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
13673 | This can happen with mutually referenced abstract_origins. | |
13674 | PR 16581. */ | |
13675 | if (!origin_child_die->in_process) | |
13676 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
13677 | } |
13678 | origin_child_die = sibling_die (origin_child_die); | |
13679 | } | |
cd02d79d | 13680 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
13681 | |
13682 | if (cu != origin_cu) | |
13683 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
13684 | } |
13685 | ||
c906108c | 13686 | static void |
e7c27a73 | 13687 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13688 | { |
518817b3 | 13689 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13690 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 13691 | struct context_stack *newobj; |
c906108c SS |
13692 | CORE_ADDR lowpc; |
13693 | CORE_ADDR highpc; | |
13694 | struct die_info *child_die; | |
edb3359d | 13695 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 13696 | const char *name; |
e142c38c | 13697 | CORE_ADDR baseaddr; |
801e3a5b | 13698 | struct block *block; |
edb3359d | 13699 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 13700 | std::vector<struct symbol *> template_args; |
34eaf542 | 13701 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
13702 | |
13703 | if (inlined_func) | |
13704 | { | |
13705 | /* If we do not have call site information, we can't show the | |
13706 | caller of this inlined function. That's too confusing, so | |
13707 | only use the scope for local variables. */ | |
13708 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
13709 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
13710 | if (call_line == NULL || call_file == NULL) | |
13711 | { | |
13712 | read_lexical_block_scope (die, cu); | |
13713 | return; | |
13714 | } | |
13715 | } | |
c906108c | 13716 | |
6a053cb1 | 13717 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
e142c38c | 13718 | |
94af9270 | 13719 | name = dwarf2_name (die, cu); |
c906108c | 13720 | |
e8d05480 JB |
13721 | /* Ignore functions with missing or empty names. These are actually |
13722 | illegal according to the DWARF standard. */ | |
13723 | if (name == NULL) | |
13724 | { | |
b98664d3 | 13725 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 13726 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
13727 | return; |
13728 | } | |
13729 | ||
13730 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 13731 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 13732 | <= PC_BOUNDS_INVALID) |
e8d05480 | 13733 | { |
ae4d0c03 PM |
13734 | attr = dwarf2_attr (die, DW_AT_external, cu); |
13735 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 13736 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
13737 | "for subprogram DIE at %s"), |
13738 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
13739 | return; |
13740 | } | |
c906108c | 13741 | |
3e29f34a MR |
13742 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13743 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13744 | |
34eaf542 TT |
13745 | /* If we have any template arguments, then we must allocate a |
13746 | different sort of symbol. */ | |
13747 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
13748 | { | |
13749 | if (child_die->tag == DW_TAG_template_type_param | |
13750 | || child_die->tag == DW_TAG_template_value_param) | |
13751 | { | |
e623cf5d | 13752 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 13753 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
13754 | break; |
13755 | } | |
13756 | } | |
13757 | ||
c24bdb02 | 13758 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
13759 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
13760 | (struct symbol *) templ_func); | |
4c2df51b | 13761 | |
81873cc8 | 13762 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 13763 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
13764 | cu->language); |
13765 | ||
4cecd739 DJ |
13766 | /* If there is a location expression for DW_AT_frame_base, record |
13767 | it. */ | |
e142c38c | 13768 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 13769 | if (attr != nullptr) |
fe978cb0 | 13770 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13771 | |
63e43d3a PMR |
13772 | /* If there is a location for the static link, record it. */ |
13773 | newobj->static_link = NULL; | |
13774 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 13775 | if (attr != nullptr) |
63e43d3a | 13776 | { |
224c3ddb SM |
13777 | newobj->static_link |
13778 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d AB |
13779 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
13780 | dwarf2_per_cu_addr_type (cu->per_cu)); | |
63e43d3a PMR |
13781 | } |
13782 | ||
c24bdb02 | 13783 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 13784 | |
639d11d3 | 13785 | if (die->child != NULL) |
c906108c | 13786 | { |
639d11d3 | 13787 | child_die = die->child; |
c906108c SS |
13788 | while (child_die && child_die->tag) |
13789 | { | |
34eaf542 TT |
13790 | if (child_die->tag == DW_TAG_template_type_param |
13791 | || child_die->tag == DW_TAG_template_value_param) | |
13792 | { | |
13793 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13794 | ||
f1078f66 | 13795 | if (arg != NULL) |
2f4732b0 | 13796 | template_args.push_back (arg); |
34eaf542 TT |
13797 | } |
13798 | else | |
13799 | process_die (child_die, cu); | |
c906108c SS |
13800 | child_die = sibling_die (child_die); |
13801 | } | |
13802 | } | |
13803 | ||
d389af10 JK |
13804 | inherit_abstract_dies (die, cu); |
13805 | ||
4a811a97 UW |
13806 | /* If we have a DW_AT_specification, we might need to import using |
13807 | directives from the context of the specification DIE. See the | |
13808 | comment in determine_prefix. */ | |
13809 | if (cu->language == language_cplus | |
13810 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13811 | { | |
13812 | struct dwarf2_cu *spec_cu = cu; | |
13813 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13814 | ||
13815 | while (spec_die) | |
13816 | { | |
13817 | child_die = spec_die->child; | |
13818 | while (child_die && child_die->tag) | |
13819 | { | |
13820 | if (child_die->tag == DW_TAG_imported_module) | |
13821 | process_die (child_die, spec_cu); | |
13822 | child_die = sibling_die (child_die); | |
13823 | } | |
13824 | ||
13825 | /* In some cases, GCC generates specification DIEs that | |
13826 | themselves contain DW_AT_specification attributes. */ | |
13827 | spec_die = die_specification (spec_die, &spec_cu); | |
13828 | } | |
13829 | } | |
13830 | ||
c24bdb02 | 13831 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13832 | /* Make a block for the local symbols within. */ |
c24bdb02 | 13833 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 13834 | cstk.static_link, lowpc, highpc); |
801e3a5b | 13835 | |
df8a16a1 | 13836 | /* For C++, set the block's scope. */ |
45280282 IB |
13837 | if ((cu->language == language_cplus |
13838 | || cu->language == language_fortran | |
c44af4eb TT |
13839 | || cu->language == language_d |
13840 | || cu->language == language_rust) | |
4d4ec4e5 | 13841 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13842 | block_set_scope (block, determine_prefix (die, cu), |
13843 | &objfile->objfile_obstack); | |
df8a16a1 | 13844 | |
801e3a5b JB |
13845 | /* If we have address ranges, record them. */ |
13846 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13847 | |
a60f3166 | 13848 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13849 | |
34eaf542 | 13850 | /* Attach template arguments to function. */ |
2f4732b0 | 13851 | if (!template_args.empty ()) |
34eaf542 TT |
13852 | { |
13853 | gdb_assert (templ_func != NULL); | |
13854 | ||
2f4732b0 | 13855 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13856 | templ_func->template_arguments |
8d749320 SM |
13857 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13858 | templ_func->n_template_arguments); | |
34eaf542 | 13859 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13860 | template_args.data (), |
34eaf542 | 13861 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13862 | |
13863 | /* Make sure that the symtab is set on the new symbols. Even | |
13864 | though they don't appear in this symtab directly, other parts | |
13865 | of gdb assume that symbols do, and this is reasonably | |
13866 | true. */ | |
8634679f | 13867 | for (symbol *sym : template_args) |
3e1d3d8c | 13868 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13869 | } |
13870 | ||
208d8187 JB |
13871 | /* In C++, we can have functions nested inside functions (e.g., when |
13872 | a function declares a class that has methods). This means that | |
13873 | when we finish processing a function scope, we may need to go | |
13874 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13875 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13876 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13877 | |
921e78cf JB |
13878 | /* If we've finished processing a top-level function, subsequent |
13879 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13880 | if (cu->get_builder ()->outermost_context_p ()) |
13881 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13882 | } |
13883 | ||
13884 | /* Process all the DIES contained within a lexical block scope. Start | |
13885 | a new scope, process the dies, and then close the scope. */ | |
13886 | ||
13887 | static void | |
e7c27a73 | 13888 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13889 | { |
518817b3 | 13890 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13891 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13892 | CORE_ADDR lowpc, highpc; |
13893 | struct die_info *child_die; | |
e142c38c DJ |
13894 | CORE_ADDR baseaddr; |
13895 | ||
6a053cb1 | 13896 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
c906108c SS |
13897 | |
13898 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13899 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13900 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13901 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13902 | describe ranges. */ |
e385593e JK |
13903 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13904 | { | |
13905 | case PC_BOUNDS_NOT_PRESENT: | |
13906 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13907 | there was no wrapping by that DW_TAG_lexical_block. | |
13908 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13909 | for (child_die = die->child; | |
13910 | child_die != NULL && child_die->tag; | |
13911 | child_die = sibling_die (child_die)) | |
13912 | process_die (child_die, cu); | |
13913 | return; | |
13914 | case PC_BOUNDS_INVALID: | |
13915 | return; | |
13916 | } | |
3e29f34a MR |
13917 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13918 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13919 | |
c24bdb02 | 13920 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13921 | if (die->child != NULL) |
c906108c | 13922 | { |
639d11d3 | 13923 | child_die = die->child; |
c906108c SS |
13924 | while (child_die && child_die->tag) |
13925 | { | |
e7c27a73 | 13926 | process_die (child_die, cu); |
c906108c SS |
13927 | child_die = sibling_die (child_die); |
13928 | } | |
13929 | } | |
3ea89b92 | 13930 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13931 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13932 | |
c24bdb02 KS |
13933 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13934 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13935 | { |
801e3a5b | 13936 | struct block *block |
c24bdb02 | 13937 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13938 | cstk.start_addr, highpc); |
801e3a5b JB |
13939 | |
13940 | /* Note that recording ranges after traversing children, as we | |
13941 | do here, means that recording a parent's ranges entails | |
13942 | walking across all its children's ranges as they appear in | |
13943 | the address map, which is quadratic behavior. | |
13944 | ||
13945 | It would be nicer to record the parent's ranges before | |
13946 | traversing its children, simply overriding whatever you find | |
13947 | there. But since we don't even decide whether to create a | |
13948 | block until after we've traversed its children, that's hard | |
13949 | to do. */ | |
13950 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13951 | } |
c24bdb02 KS |
13952 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13953 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13954 | } |
13955 | ||
216f72a1 | 13956 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13957 | |
13958 | static void | |
13959 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13960 | { | |
518817b3 | 13961 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13962 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13963 | CORE_ADDR pc, baseaddr; | |
13964 | struct attribute *attr; | |
13965 | struct call_site *call_site, call_site_local; | |
13966 | void **slot; | |
13967 | int nparams; | |
13968 | struct die_info *child_die; | |
13969 | ||
6a053cb1 | 13970 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
96408a79 | 13971 | |
216f72a1 JK |
13972 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13973 | if (attr == NULL) | |
13974 | { | |
13975 | /* This was a pre-DWARF-5 GNU extension alias | |
13976 | for DW_AT_call_return_pc. */ | |
13977 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13978 | } | |
96408a79 SA |
13979 | if (!attr) |
13980 | { | |
b98664d3 | 13981 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13982 | "DIE %s [in module %s]"), |
13983 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13984 | return; |
13985 | } | |
31aa7e4e | 13986 | pc = attr_value_as_address (attr) + baseaddr; |
3e29f34a | 13987 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13988 | |
13989 | if (cu->call_site_htab == NULL) | |
13990 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13991 | NULL, &objfile->objfile_obstack, | |
13992 | hashtab_obstack_allocate, NULL); | |
13993 | call_site_local.pc = pc; | |
13994 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13995 | if (*slot != NULL) | |
13996 | { | |
b98664d3 | 13997 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13998 | "DIE %s [in module %s]"), |
13999 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 14000 | objfile_name (objfile)); |
96408a79 SA |
14001 | return; |
14002 | } | |
14003 | ||
14004 | /* Count parameters at the caller. */ | |
14005 | ||
14006 | nparams = 0; | |
14007 | for (child_die = die->child; child_die && child_die->tag; | |
14008 | child_die = sibling_die (child_die)) | |
14009 | { | |
216f72a1 JK |
14010 | if (child_die->tag != DW_TAG_call_site_parameter |
14011 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 14012 | { |
b98664d3 | 14013 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
14014 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14015 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 14016 | objfile_name (objfile)); |
96408a79 SA |
14017 | continue; |
14018 | } | |
14019 | ||
14020 | nparams++; | |
14021 | } | |
14022 | ||
224c3ddb SM |
14023 | call_site |
14024 | = ((struct call_site *) | |
14025 | obstack_alloc (&objfile->objfile_obstack, | |
14026 | sizeof (*call_site) | |
14027 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
14028 | *slot = call_site; |
14029 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
14030 | call_site->pc = pc; | |
14031 | ||
216f72a1 JK |
14032 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
14033 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
14034 | { |
14035 | struct die_info *func_die; | |
14036 | ||
14037 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
14038 | for (func_die = die->parent; | |
14039 | func_die && func_die->tag != DW_TAG_subprogram | |
14040 | && func_die->tag != DW_TAG_subroutine_type; | |
14041 | func_die = func_die->parent); | |
14042 | ||
216f72a1 JK |
14043 | /* DW_AT_call_all_calls is a superset |
14044 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 14045 | if (func_die |
216f72a1 | 14046 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 14047 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 14048 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
14049 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
14050 | { | |
14051 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
14052 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
14053 | both the initial caller containing the real return address PC and | |
14054 | the final callee containing the current PC of a chain of tail | |
14055 | calls do not need to have the tail call list complete. But any | |
14056 | function candidate for a virtual tail call frame searched via | |
14057 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
14058 | determined unambiguously. */ | |
14059 | } | |
14060 | else | |
14061 | { | |
14062 | struct type *func_type = NULL; | |
14063 | ||
14064 | if (func_die) | |
14065 | func_type = get_die_type (func_die, cu); | |
14066 | if (func_type != NULL) | |
14067 | { | |
14068 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
14069 | ||
14070 | /* Enlist this call site to the function. */ | |
14071 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
14072 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
14073 | } | |
14074 | else | |
b98664d3 | 14075 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
14076 | "DIE %s [in module %s]"), |
14077 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14078 | } |
14079 | } | |
14080 | ||
216f72a1 JK |
14081 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
14082 | if (attr == NULL) | |
14083 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
14084 | if (attr == NULL) | |
14085 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 14086 | if (attr == NULL) |
216f72a1 JK |
14087 | { |
14088 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
14089 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14090 | } | |
96408a79 SA |
14091 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
14092 | if (!attr || (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0)) | |
14093 | /* Keep NULL DWARF_BLOCK. */; | |
14094 | else if (attr_form_is_block (attr)) | |
14095 | { | |
14096 | struct dwarf2_locexpr_baton *dlbaton; | |
14097 | ||
8d749320 | 14098 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
14099 | dlbaton->data = DW_BLOCK (attr)->data; |
14100 | dlbaton->size = DW_BLOCK (attr)->size; | |
14101 | dlbaton->per_cu = cu->per_cu; | |
14102 | ||
14103 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
14104 | } | |
7771576e | 14105 | else if (attr_form_is_ref (attr)) |
96408a79 | 14106 | { |
96408a79 SA |
14107 | struct dwarf2_cu *target_cu = cu; |
14108 | struct die_info *target_die; | |
14109 | ||
ac9ec31b | 14110 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 14111 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
14112 | if (die_is_declaration (target_die, target_cu)) |
14113 | { | |
7d45c7c3 | 14114 | const char *target_physname; |
9112db09 JK |
14115 | |
14116 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 14117 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 14118 | if (target_physname == NULL) |
9112db09 | 14119 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 14120 | if (target_physname == NULL) |
b98664d3 | 14121 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14122 | "physname, for referencing DIE %s [in module %s]"), |
14123 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14124 | else |
7d455152 | 14125 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
14126 | } |
14127 | else | |
14128 | { | |
14129 | CORE_ADDR lowpc; | |
14130 | ||
14131 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 14132 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 14133 | <= PC_BOUNDS_INVALID) |
b98664d3 | 14134 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
14135 | "low pc, for referencing DIE %s [in module %s]"), |
14136 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 14137 | else |
3e29f34a MR |
14138 | { |
14139 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
14140 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
14141 | } | |
96408a79 SA |
14142 | } |
14143 | } | |
14144 | else | |
b98664d3 | 14145 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
14146 | "block nor reference, for DIE %s [in module %s]"), |
14147 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14148 | |
14149 | call_site->per_cu = cu->per_cu; | |
14150 | ||
14151 | for (child_die = die->child; | |
14152 | child_die && child_die->tag; | |
14153 | child_die = sibling_die (child_die)) | |
14154 | { | |
96408a79 | 14155 | struct call_site_parameter *parameter; |
1788b2d3 | 14156 | struct attribute *loc, *origin; |
96408a79 | 14157 | |
216f72a1 JK |
14158 | if (child_die->tag != DW_TAG_call_site_parameter |
14159 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
14160 | { |
14161 | /* Already printed the complaint above. */ | |
14162 | continue; | |
14163 | } | |
14164 | ||
14165 | gdb_assert (call_site->parameter_count < nparams); | |
14166 | parameter = &call_site->parameter[call_site->parameter_count]; | |
14167 | ||
1788b2d3 JK |
14168 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
14169 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 14170 | register is contained in DW_AT_call_value. */ |
96408a79 | 14171 | |
24c5c679 | 14172 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
14173 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
14174 | if (origin == NULL) | |
14175 | { | |
14176 | /* This was a pre-DWARF-5 GNU extension alias | |
14177 | for DW_AT_call_parameter. */ | |
14178 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
14179 | } | |
7771576e | 14180 | if (loc == NULL && origin != NULL && attr_form_is_ref (origin)) |
1788b2d3 | 14181 | { |
1788b2d3 | 14182 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
14183 | |
14184 | sect_offset sect_off | |
14185 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
14186 | if (!offset_in_cu_p (&cu->header, sect_off)) | |
d76b7dbc JK |
14187 | { |
14188 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
14189 | binding can be done only inside one CU. Such referenced DIE | |
14190 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 14191 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
14192 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14193 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14194 | objfile_name (objfile)); |
d76b7dbc JK |
14195 | continue; |
14196 | } | |
9c541725 PA |
14197 | parameter->u.param_cu_off |
14198 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 JK |
14199 | } |
14200 | else if (loc == NULL || origin != NULL || !attr_form_is_block (loc)) | |
96408a79 | 14201 | { |
b98664d3 | 14202 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
14203 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14204 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
14205 | continue; |
14206 | } | |
24c5c679 | 14207 | else |
96408a79 | 14208 | { |
24c5c679 JK |
14209 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
14210 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
14211 | if (parameter->u.dwarf_reg != -1) | |
14212 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
14213 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
14214 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
14215 | ¶meter->u.fb_offset)) | |
14216 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
14217 | else | |
14218 | { | |
b98664d3 | 14219 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 14220 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 14221 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 14222 | "[in module %s]"), |
9d8780f0 | 14223 | sect_offset_str (child_die->sect_off), |
9c541725 | 14224 | objfile_name (objfile)); |
24c5c679 JK |
14225 | continue; |
14226 | } | |
96408a79 SA |
14227 | } |
14228 | ||
216f72a1 JK |
14229 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
14230 | if (attr == NULL) | |
14231 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
96408a79 SA |
14232 | if (!attr_form_is_block (attr)) |
14233 | { | |
b98664d3 | 14234 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
14235 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14236 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14237 | objfile_name (objfile)); |
96408a79 SA |
14238 | continue; |
14239 | } | |
14240 | parameter->value = DW_BLOCK (attr)->data; | |
14241 | parameter->value_size = DW_BLOCK (attr)->size; | |
14242 | ||
14243 | /* Parameters are not pre-cleared by memset above. */ | |
14244 | parameter->data_value = NULL; | |
14245 | parameter->data_value_size = 0; | |
14246 | call_site->parameter_count++; | |
14247 | ||
216f72a1 JK |
14248 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
14249 | if (attr == NULL) | |
14250 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 14251 | if (attr != nullptr) |
96408a79 SA |
14252 | { |
14253 | if (!attr_form_is_block (attr)) | |
b98664d3 | 14254 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
14255 | "DW_TAG_call_site child DIE %s [in module %s]"), |
14256 | sect_offset_str (child_die->sect_off), | |
9c541725 | 14257 | objfile_name (objfile)); |
96408a79 SA |
14258 | else |
14259 | { | |
14260 | parameter->data_value = DW_BLOCK (attr)->data; | |
14261 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
14262 | } | |
14263 | } | |
14264 | } | |
14265 | } | |
14266 | ||
71a3c369 TT |
14267 | /* Helper function for read_variable. If DIE represents a virtual |
14268 | table, then return the type of the concrete object that is | |
14269 | associated with the virtual table. Otherwise, return NULL. */ | |
14270 | ||
14271 | static struct type * | |
14272 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
14273 | { | |
14274 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
14275 | if (attr == NULL) | |
14276 | return NULL; | |
14277 | ||
14278 | /* Find the type DIE. */ | |
14279 | struct die_info *type_die = NULL; | |
14280 | struct dwarf2_cu *type_cu = cu; | |
14281 | ||
14282 | if (attr_form_is_ref (attr)) | |
14283 | type_die = follow_die_ref (die, attr, &type_cu); | |
14284 | if (type_die == NULL) | |
14285 | return NULL; | |
14286 | ||
14287 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
14288 | return NULL; | |
14289 | return die_containing_type (type_die, type_cu); | |
14290 | } | |
14291 | ||
14292 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
14293 | ||
14294 | static void | |
14295 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
14296 | { | |
14297 | struct rust_vtable_symbol *storage = NULL; | |
14298 | ||
14299 | if (cu->language == language_rust) | |
14300 | { | |
14301 | struct type *containing_type = rust_containing_type (die, cu); | |
14302 | ||
14303 | if (containing_type != NULL) | |
14304 | { | |
518817b3 | 14305 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 | 14306 | |
468c0cbb | 14307 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol (); |
71a3c369 TT |
14308 | initialize_objfile_symbol (storage); |
14309 | storage->concrete_type = containing_type; | |
cf724bc9 | 14310 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
14311 | } |
14312 | } | |
14313 | ||
e4a62c65 TV |
14314 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
14315 | struct attribute *abstract_origin | |
14316 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
14317 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
14318 | if (res == NULL && loc && abstract_origin) | |
14319 | { | |
14320 | /* We have a variable without a name, but with a location and an abstract | |
14321 | origin. This may be a concrete instance of an abstract variable | |
14322 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
14323 | later. */ | |
14324 | struct dwarf2_cu *origin_cu = cu; | |
14325 | struct die_info *origin_die | |
14326 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
14327 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 14328 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 14329 | } |
71a3c369 TT |
14330 | } |
14331 | ||
43988095 JK |
14332 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
14333 | reading .debug_rnglists. | |
14334 | Callback's type should be: | |
14335 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14336 | Return true if the attributes are present and valid, otherwise, | |
14337 | return false. */ | |
14338 | ||
14339 | template <typename Callback> | |
14340 | static bool | |
14341 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
14342 | Callback &&callback) | |
14343 | { | |
ed2dc618 | 14344 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14345 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14346 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 14347 | bfd *obfd = objfile->obfd; |
43988095 JK |
14348 | /* Base address selection entry. */ |
14349 | CORE_ADDR base; | |
14350 | int found_base; | |
43988095 | 14351 | const gdb_byte *buffer; |
43988095 JK |
14352 | CORE_ADDR baseaddr; |
14353 | bool overflow = false; | |
14354 | ||
14355 | found_base = cu->base_known; | |
14356 | base = cu->base_address; | |
14357 | ||
14358 | dwarf2_read_section (objfile, &dwarf2_per_objfile->rnglists); | |
14359 | if (offset >= dwarf2_per_objfile->rnglists.size) | |
14360 | { | |
b98664d3 | 14361 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
14362 | offset); |
14363 | return false; | |
14364 | } | |
14365 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
14366 | ||
6a053cb1 | 14367 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
43988095 JK |
14368 | |
14369 | while (1) | |
14370 | { | |
7814882a JK |
14371 | /* Initialize it due to a false compiler warning. */ |
14372 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
14373 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
14374 | + dwarf2_per_objfile->rnglists.size); | |
14375 | unsigned int bytes_read; | |
14376 | ||
14377 | if (buffer == buf_end) | |
14378 | { | |
14379 | overflow = true; | |
14380 | break; | |
14381 | } | |
14382 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
14383 | switch (rlet) | |
14384 | { | |
14385 | case DW_RLE_end_of_list: | |
14386 | break; | |
14387 | case DW_RLE_base_address: | |
14388 | if (buffer + cu->header.addr_size > buf_end) | |
14389 | { | |
14390 | overflow = true; | |
14391 | break; | |
14392 | } | |
14393 | base = read_address (obfd, buffer, cu, &bytes_read); | |
14394 | found_base = 1; | |
14395 | buffer += bytes_read; | |
14396 | break; | |
14397 | case DW_RLE_start_length: | |
14398 | if (buffer + cu->header.addr_size > buf_end) | |
14399 | { | |
14400 | overflow = true; | |
14401 | break; | |
14402 | } | |
14403 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14404 | buffer += bytes_read; | |
14405 | range_end = (range_beginning | |
14406 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
14407 | buffer += bytes_read; | |
14408 | if (buffer > buf_end) | |
14409 | { | |
14410 | overflow = true; | |
14411 | break; | |
14412 | } | |
14413 | break; | |
14414 | case DW_RLE_offset_pair: | |
14415 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14416 | buffer += bytes_read; | |
14417 | if (buffer > buf_end) | |
14418 | { | |
14419 | overflow = true; | |
14420 | break; | |
14421 | } | |
14422 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
14423 | buffer += bytes_read; | |
14424 | if (buffer > buf_end) | |
14425 | { | |
14426 | overflow = true; | |
14427 | break; | |
14428 | } | |
14429 | break; | |
14430 | case DW_RLE_start_end: | |
14431 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
14432 | { | |
14433 | overflow = true; | |
14434 | break; | |
14435 | } | |
14436 | range_beginning = read_address (obfd, buffer, cu, &bytes_read); | |
14437 | buffer += bytes_read; | |
14438 | range_end = read_address (obfd, buffer, cu, &bytes_read); | |
14439 | buffer += bytes_read; | |
14440 | break; | |
14441 | default: | |
b98664d3 | 14442 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14443 | return false; |
14444 | } | |
14445 | if (rlet == DW_RLE_end_of_list || overflow) | |
14446 | break; | |
14447 | if (rlet == DW_RLE_base_address) | |
14448 | continue; | |
14449 | ||
14450 | if (!found_base) | |
14451 | { | |
14452 | /* We have no valid base address for the ranges | |
14453 | data. */ | |
b98664d3 | 14454 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
14455 | return false; |
14456 | } | |
14457 | ||
14458 | if (range_beginning > range_end) | |
14459 | { | |
14460 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14461 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
14462 | return false; |
14463 | } | |
14464 | ||
14465 | /* Empty range entries have no effect. */ | |
14466 | if (range_beginning == range_end) | |
14467 | continue; | |
14468 | ||
14469 | range_beginning += base; | |
14470 | range_end += base; | |
14471 | ||
14472 | /* A not-uncommon case of bad debug info. | |
14473 | Don't pollute the addrmap with bad data. */ | |
14474 | if (range_beginning + baseaddr == 0 | |
14475 | && !dwarf2_per_objfile->has_section_at_zero) | |
14476 | { | |
b98664d3 | 14477 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
14478 | " [in module %s]"), objfile_name (objfile)); |
14479 | continue; | |
14480 | } | |
14481 | ||
14482 | callback (range_beginning, range_end); | |
14483 | } | |
14484 | ||
14485 | if (overflow) | |
14486 | { | |
b98664d3 | 14487 | complaint (_("Offset %d is not terminated " |
43988095 JK |
14488 | "for DW_AT_ranges attribute"), |
14489 | offset); | |
14490 | return false; | |
14491 | } | |
14492 | ||
14493 | return true; | |
14494 | } | |
14495 | ||
14496 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
14497 | Callback's type should be: | |
14498 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 14499 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 14500 | |
43988095 | 14501 | template <typename Callback> |
43039443 | 14502 | static int |
5f46c5a5 | 14503 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 14504 | Callback &&callback) |
43039443 | 14505 | { |
ed2dc618 | 14506 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 14507 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 14508 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
14509 | struct comp_unit_head *cu_header = &cu->header; |
14510 | bfd *obfd = objfile->obfd; | |
14511 | unsigned int addr_size = cu_header->addr_size; | |
14512 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
14513 | /* Base address selection entry. */ | |
14514 | CORE_ADDR base; | |
14515 | int found_base; | |
14516 | unsigned int dummy; | |
d521ce57 | 14517 | const gdb_byte *buffer; |
ff013f42 | 14518 | CORE_ADDR baseaddr; |
43039443 | 14519 | |
43988095 JK |
14520 | if (cu_header->version >= 5) |
14521 | return dwarf2_rnglists_process (offset, cu, callback); | |
14522 | ||
d00adf39 DE |
14523 | found_base = cu->base_known; |
14524 | base = cu->base_address; | |
43039443 | 14525 | |
be391dca | 14526 | dwarf2_read_section (objfile, &dwarf2_per_objfile->ranges); |
dce234bc | 14527 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 14528 | { |
b98664d3 | 14529 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
14530 | offset); |
14531 | return 0; | |
14532 | } | |
dce234bc | 14533 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 14534 | |
6a053cb1 | 14535 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
ff013f42 | 14536 | |
43039443 JK |
14537 | while (1) |
14538 | { | |
14539 | CORE_ADDR range_beginning, range_end; | |
14540 | ||
14541 | range_beginning = read_address (obfd, buffer, cu, &dummy); | |
14542 | buffer += addr_size; | |
14543 | range_end = read_address (obfd, buffer, cu, &dummy); | |
14544 | buffer += addr_size; | |
14545 | offset += 2 * addr_size; | |
14546 | ||
14547 | /* An end of list marker is a pair of zero addresses. */ | |
14548 | if (range_beginning == 0 && range_end == 0) | |
14549 | /* Found the end of list entry. */ | |
14550 | break; | |
14551 | ||
14552 | /* Each base address selection entry is a pair of 2 values. | |
14553 | The first is the largest possible address, the second is | |
14554 | the base address. Check for a base address here. */ | |
14555 | if ((range_beginning & mask) == mask) | |
14556 | { | |
28d2bfb9 AB |
14557 | /* If we found the largest possible address, then we already |
14558 | have the base address in range_end. */ | |
14559 | base = range_end; | |
43039443 JK |
14560 | found_base = 1; |
14561 | continue; | |
14562 | } | |
14563 | ||
14564 | if (!found_base) | |
14565 | { | |
14566 | /* We have no valid base address for the ranges | |
14567 | data. */ | |
b98664d3 | 14568 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
14569 | return 0; |
14570 | } | |
14571 | ||
9277c30c UW |
14572 | if (range_beginning > range_end) |
14573 | { | |
14574 | /* Inverted range entries are invalid. */ | |
b98664d3 | 14575 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
14576 | return 0; |
14577 | } | |
14578 | ||
14579 | /* Empty range entries have no effect. */ | |
14580 | if (range_beginning == range_end) | |
14581 | continue; | |
14582 | ||
43039443 JK |
14583 | range_beginning += base; |
14584 | range_end += base; | |
14585 | ||
01093045 DE |
14586 | /* A not-uncommon case of bad debug info. |
14587 | Don't pollute the addrmap with bad data. */ | |
14588 | if (range_beginning + baseaddr == 0 | |
14589 | && !dwarf2_per_objfile->has_section_at_zero) | |
14590 | { | |
b98664d3 | 14591 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 14592 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
14593 | continue; |
14594 | } | |
14595 | ||
5f46c5a5 JK |
14596 | callback (range_beginning, range_end); |
14597 | } | |
14598 | ||
14599 | return 1; | |
14600 | } | |
14601 | ||
14602 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
14603 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
14604 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
14605 | ||
14606 | static int | |
14607 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
14608 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
14609 | struct partial_symtab *ranges_pst) | |
14610 | { | |
518817b3 | 14611 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 | 14612 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6a053cb1 | 14613 | const CORE_ADDR baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
5f46c5a5 JK |
14614 | int low_set = 0; |
14615 | CORE_ADDR low = 0; | |
14616 | CORE_ADDR high = 0; | |
14617 | int retval; | |
14618 | ||
14619 | retval = dwarf2_ranges_process (offset, cu, | |
14620 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
14621 | { | |
9277c30c | 14622 | if (ranges_pst != NULL) |
3e29f34a MR |
14623 | { |
14624 | CORE_ADDR lowpc; | |
14625 | CORE_ADDR highpc; | |
14626 | ||
79748972 TT |
14627 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
14628 | range_beginning + baseaddr) | |
14629 | - baseaddr); | |
14630 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
14631 | range_end + baseaddr) | |
14632 | - baseaddr); | |
d320c2b5 TT |
14633 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
14634 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 14635 | } |
ff013f42 | 14636 | |
43039443 JK |
14637 | /* FIXME: This is recording everything as a low-high |
14638 | segment of consecutive addresses. We should have a | |
14639 | data structure for discontiguous block ranges | |
14640 | instead. */ | |
14641 | if (! low_set) | |
14642 | { | |
14643 | low = range_beginning; | |
14644 | high = range_end; | |
14645 | low_set = 1; | |
14646 | } | |
14647 | else | |
14648 | { | |
14649 | if (range_beginning < low) | |
14650 | low = range_beginning; | |
14651 | if (range_end > high) | |
14652 | high = range_end; | |
14653 | } | |
5f46c5a5 JK |
14654 | }); |
14655 | if (!retval) | |
14656 | return 0; | |
43039443 JK |
14657 | |
14658 | if (! low_set) | |
14659 | /* If the first entry is an end-of-list marker, the range | |
14660 | describes an empty scope, i.e. no instructions. */ | |
14661 | return 0; | |
14662 | ||
14663 | if (low_return) | |
14664 | *low_return = low; | |
14665 | if (high_return) | |
14666 | *high_return = high; | |
14667 | return 1; | |
14668 | } | |
14669 | ||
3a2b436a JK |
14670 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
14671 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 14672 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 14673 | |
3a2b436a | 14674 | static enum pc_bounds_kind |
af34e669 | 14675 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 DJ |
14676 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
14677 | struct partial_symtab *pst) | |
c906108c | 14678 | { |
518817b3 SM |
14679 | struct dwarf2_per_objfile *dwarf2_per_objfile |
14680 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 14681 | struct attribute *attr; |
91da1414 | 14682 | struct attribute *attr_high; |
af34e669 DJ |
14683 | CORE_ADDR low = 0; |
14684 | CORE_ADDR high = 0; | |
e385593e | 14685 | enum pc_bounds_kind ret; |
c906108c | 14686 | |
91da1414 MW |
14687 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14688 | if (attr_high) | |
af34e669 | 14689 | { |
e142c38c | 14690 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14691 | if (attr != nullptr) |
91da1414 | 14692 | { |
31aa7e4e JB |
14693 | low = attr_value_as_address (attr); |
14694 | high = attr_value_as_address (attr_high); | |
14695 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14696 | high += low; | |
91da1414 | 14697 | } |
af34e669 DJ |
14698 | else |
14699 | /* Found high w/o low attribute. */ | |
e385593e | 14700 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
14701 | |
14702 | /* Found consecutive range of addresses. */ | |
3a2b436a | 14703 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 14704 | } |
c906108c | 14705 | else |
af34e669 | 14706 | { |
e142c38c | 14707 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
14708 | if (attr != NULL) |
14709 | { | |
ab435259 DE |
14710 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14711 | We take advantage of the fact that DW_AT_ranges does not appear | |
14712 | in DW_TAG_compile_unit of DWO files. */ | |
14713 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
14714 | unsigned int ranges_offset = (DW_UNSND (attr) | |
14715 | + (need_ranges_base | |
14716 | ? cu->ranges_base | |
14717 | : 0)); | |
2e3cf129 | 14718 | |
af34e669 | 14719 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14720 | .debug_ranges section. */ |
2e3cf129 | 14721 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 14722 | return PC_BOUNDS_INVALID; |
43039443 | 14723 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14724 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14725 | } |
e385593e JK |
14726 | else |
14727 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14728 | } |
c906108c | 14729 | |
48fbe735 | 14730 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 14731 | if (high <= low) |
e385593e | 14732 | return PC_BOUNDS_INVALID; |
c906108c SS |
14733 | |
14734 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14735 | eliminate duplicate copies of functions and vtables and such. | |
14736 | The linker will arbitrarily choose one and discard the others. | |
14737 | The AT_*_pc values for such functions refer to local labels in | |
14738 | these sections. If the section from that file was discarded, the | |
14739 | labels are not in the output, so the relocs get a value of 0. | |
14740 | If this is a discarded function, mark the pc bounds as invalid, | |
14741 | so that GDB will ignore it. */ | |
72dca2f5 | 14742 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 14743 | return PC_BOUNDS_INVALID; |
c906108c SS |
14744 | |
14745 | *lowpc = low; | |
96408a79 SA |
14746 | if (highpc) |
14747 | *highpc = high; | |
af34e669 | 14748 | return ret; |
c906108c SS |
14749 | } |
14750 | ||
b084d499 JB |
14751 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14752 | its low and high PC addresses. Do nothing if these addresses could not | |
14753 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14754 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14755 | ||
14756 | static void | |
14757 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
14758 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14759 | struct dwarf2_cu *cu) | |
14760 | { | |
14761 | CORE_ADDR low, high; | |
14762 | struct die_info *child = die->child; | |
14763 | ||
e385593e | 14764 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14765 | { |
325fac50 PA |
14766 | *lowpc = std::min (*lowpc, low); |
14767 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14768 | } |
14769 | ||
14770 | /* If the language does not allow nested subprograms (either inside | |
14771 | subprograms or lexical blocks), we're done. */ | |
14772 | if (cu->language != language_ada) | |
14773 | return; | |
6e70227d | 14774 | |
b084d499 JB |
14775 | /* Check all the children of the given DIE. If it contains nested |
14776 | subprograms, then check their pc bounds. Likewise, we need to | |
14777 | check lexical blocks as well, as they may also contain subprogram | |
14778 | definitions. */ | |
14779 | while (child && child->tag) | |
14780 | { | |
14781 | if (child->tag == DW_TAG_subprogram | |
14782 | || child->tag == DW_TAG_lexical_block) | |
14783 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
14784 | child = sibling_die (child); | |
14785 | } | |
14786 | } | |
14787 | ||
fae299cd DC |
14788 | /* Get the low and high pc's represented by the scope DIE, and store |
14789 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14790 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14791 | ||
14792 | static void | |
14793 | get_scope_pc_bounds (struct die_info *die, | |
14794 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14795 | struct dwarf2_cu *cu) | |
14796 | { | |
14797 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14798 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14799 | CORE_ADDR current_low, current_high; | |
14800 | ||
3a2b436a | 14801 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14802 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14803 | { |
14804 | best_low = current_low; | |
14805 | best_high = current_high; | |
14806 | } | |
14807 | else | |
14808 | { | |
14809 | struct die_info *child = die->child; | |
14810 | ||
14811 | while (child && child->tag) | |
14812 | { | |
14813 | switch (child->tag) { | |
14814 | case DW_TAG_subprogram: | |
b084d499 | 14815 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14816 | break; |
14817 | case DW_TAG_namespace: | |
f55ee35c | 14818 | case DW_TAG_module: |
fae299cd DC |
14819 | /* FIXME: carlton/2004-01-16: Should we do this for |
14820 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14821 | that current GCC's always emit the DIEs corresponding | |
14822 | to definitions of methods of classes as children of a | |
14823 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14824 | the DIEs giving the declarations, which could be | |
14825 | anywhere). But I don't see any reason why the | |
14826 | standards says that they have to be there. */ | |
14827 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14828 | ||
14829 | if (current_low != ((CORE_ADDR) -1)) | |
14830 | { | |
325fac50 PA |
14831 | best_low = std::min (best_low, current_low); |
14832 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14833 | } |
14834 | break; | |
14835 | default: | |
0963b4bd | 14836 | /* Ignore. */ |
fae299cd DC |
14837 | break; |
14838 | } | |
14839 | ||
14840 | child = sibling_die (child); | |
14841 | } | |
14842 | } | |
14843 | ||
14844 | *lowpc = best_low; | |
14845 | *highpc = best_high; | |
14846 | } | |
14847 | ||
801e3a5b JB |
14848 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14849 | in DIE. */ | |
380bca97 | 14850 | |
801e3a5b JB |
14851 | static void |
14852 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
14853 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
14854 | { | |
518817b3 | 14855 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 14856 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14857 | struct attribute *attr; |
91da1414 | 14858 | struct attribute *attr_high; |
801e3a5b | 14859 | |
91da1414 MW |
14860 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14861 | if (attr_high) | |
801e3a5b | 14862 | { |
801e3a5b | 14863 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14864 | if (attr != nullptr) |
801e3a5b | 14865 | { |
31aa7e4e JB |
14866 | CORE_ADDR low = attr_value_as_address (attr); |
14867 | CORE_ADDR high = attr_value_as_address (attr_high); | |
14868 | ||
14869 | if (cu->header.version >= 4 && attr_form_is_constant (attr_high)) | |
14870 | high += low; | |
9a619af0 | 14871 | |
3e29f34a MR |
14872 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14873 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14874 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14875 | } |
14876 | } | |
14877 | ||
14878 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
435d3d88 | 14879 | if (attr != nullptr) |
801e3a5b | 14880 | { |
ab435259 DE |
14881 | /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton. |
14882 | We take advantage of the fact that DW_AT_ranges does not appear | |
14883 | in DW_TAG_compile_unit of DWO files. */ | |
14884 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14885 | |
14886 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14887 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14888 | unsigned long offset = (DW_UNSND (attr) |
14889 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14890 | |
2d5f09ec | 14891 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14892 | dwarf2_ranges_process (offset, cu, |
14893 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14894 | { | |
58fdfd2c JK |
14895 | start += baseaddr; |
14896 | end += baseaddr; | |
5f46c5a5 JK |
14897 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14898 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14899 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14900 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14901 | }); |
2d5f09ec KB |
14902 | |
14903 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14904 | } |
14905 | } | |
14906 | ||
685b1105 JK |
14907 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14908 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14909 | |
685b1105 JK |
14910 | static void |
14911 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14912 | { |
38360086 | 14913 | int major, minor; |
60d5a603 JK |
14914 | |
14915 | if (cu->producer == NULL) | |
14916 | { | |
14917 | /* For unknown compilers expect their behavior is DWARF version | |
14918 | compliant. | |
14919 | ||
14920 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14921 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14922 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14923 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14924 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14925 | } |
b1ffba5a | 14926 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14927 | { |
38360086 MW |
14928 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14929 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14930 | } |
5230b05a | 14931 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14932 | { |
14933 | cu->producer_is_icc = true; | |
14934 | cu->producer_is_icc_lt_14 = major < 14; | |
14935 | } | |
c258c396 JD |
14936 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14937 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14938 | else |
14939 | { | |
14940 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14941 | compliant. */ | |
60d5a603 JK |
14942 | } |
14943 | ||
9068261f | 14944 | cu->checked_producer = true; |
685b1105 | 14945 | } |
ba919b58 | 14946 | |
685b1105 JK |
14947 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14948 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14949 | during 4.6.0 experimental. */ | |
14950 | ||
9068261f | 14951 | static bool |
685b1105 JK |
14952 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14953 | { | |
14954 | if (!cu->checked_producer) | |
14955 | check_producer (cu); | |
14956 | ||
14957 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14958 | } |
14959 | ||
c258c396 JD |
14960 | |
14961 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14962 | with incorrect is_stmt attributes. */ | |
14963 | ||
14964 | static bool | |
14965 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14966 | { | |
14967 | if (!cu->checked_producer) | |
14968 | check_producer (cu); | |
14969 | ||
14970 | return cu->producer_is_codewarrior; | |
14971 | } | |
14972 | ||
405feb71 | 14973 | /* Return the default accessibility type if it is not overridden by |
60d5a603 JK |
14974 | DW_AT_accessibility. */ |
14975 | ||
14976 | static enum dwarf_access_attribute | |
14977 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14978 | { | |
14979 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14980 | { | |
14981 | /* The default DWARF 2 accessibility for members is public, the default | |
14982 | accessibility for inheritance is private. */ | |
14983 | ||
14984 | if (die->tag != DW_TAG_inheritance) | |
14985 | return DW_ACCESS_public; | |
14986 | else | |
14987 | return DW_ACCESS_private; | |
14988 | } | |
14989 | else | |
14990 | { | |
14991 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14992 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14993 | depends on the container kind. */ | |
14994 | ||
14995 | if (die->parent->tag == DW_TAG_class_type) | |
14996 | return DW_ACCESS_private; | |
14997 | else | |
14998 | return DW_ACCESS_public; | |
14999 | } | |
15000 | } | |
15001 | ||
74ac6d43 TT |
15002 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
15003 | offset. If the attribute was not found return 0, otherwise return | |
15004 | 1. If it was found but could not properly be handled, set *OFFSET | |
15005 | to 0. */ | |
15006 | ||
15007 | static int | |
15008 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
15009 | LONGEST *offset) | |
15010 | { | |
15011 | struct attribute *attr; | |
15012 | ||
15013 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
15014 | if (attr != NULL) | |
15015 | { | |
15016 | *offset = 0; | |
15017 | ||
15018 | /* Note that we do not check for a section offset first here. | |
15019 | This is because DW_AT_data_member_location is new in DWARF 4, | |
15020 | so if we see it, we can assume that a constant form is really | |
15021 | a constant and not a section offset. */ | |
15022 | if (attr_form_is_constant (attr)) | |
15023 | *offset = dwarf2_get_attr_constant_value (attr, 0); | |
15024 | else if (attr_form_is_section_offset (attr)) | |
15025 | dwarf2_complex_location_expr_complaint (); | |
15026 | else if (attr_form_is_block (attr)) | |
15027 | *offset = decode_locdesc (DW_BLOCK (attr), cu); | |
15028 | else | |
15029 | dwarf2_complex_location_expr_complaint (); | |
15030 | ||
15031 | return 1; | |
15032 | } | |
15033 | ||
15034 | return 0; | |
15035 | } | |
15036 | ||
c906108c SS |
15037 | /* Add an aggregate field to the field list. */ |
15038 | ||
15039 | static void | |
107d2387 | 15040 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15041 | struct dwarf2_cu *cu) |
6e70227d | 15042 | { |
518817b3 | 15043 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 15044 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
15045 | struct nextfield *new_field; |
15046 | struct attribute *attr; | |
15047 | struct field *fp; | |
15d034d0 | 15048 | const char *fieldname = ""; |
c906108c | 15049 | |
7d0ccb61 DJ |
15050 | if (die->tag == DW_TAG_inheritance) |
15051 | { | |
be2daae6 TT |
15052 | fip->baseclasses.emplace_back (); |
15053 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
15054 | } |
15055 | else | |
15056 | { | |
be2daae6 TT |
15057 | fip->fields.emplace_back (); |
15058 | new_field = &fip->fields.back (); | |
7d0ccb61 | 15059 | } |
be2daae6 | 15060 | |
c906108c SS |
15061 | fip->nfields++; |
15062 | ||
e142c38c | 15063 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 15064 | if (attr != nullptr) |
c906108c | 15065 | new_field->accessibility = DW_UNSND (attr); |
60d5a603 JK |
15066 | else |
15067 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
15068 | if (new_field->accessibility != DW_ACCESS_public) |
15069 | fip->non_public_fields = 1; | |
60d5a603 | 15070 | |
e142c38c | 15071 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 15072 | if (attr != nullptr) |
c906108c | 15073 | new_field->virtuality = DW_UNSND (attr); |
60d5a603 JK |
15074 | else |
15075 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
15076 | |
15077 | fp = &new_field->field; | |
a9a9bd0f | 15078 | |
e142c38c | 15079 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 15080 | { |
74ac6d43 TT |
15081 | LONGEST offset; |
15082 | ||
a9a9bd0f | 15083 | /* Data member other than a C++ static data member. */ |
6e70227d | 15084 | |
c906108c | 15085 | /* Get type of field. */ |
e7c27a73 | 15086 | fp->type = die_type (die, cu); |
c906108c | 15087 | |
d6a843b5 | 15088 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 15089 | |
c906108c | 15090 | /* Get bit size of field (zero if none). */ |
e142c38c | 15091 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 15092 | if (attr != nullptr) |
c906108c SS |
15093 | { |
15094 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
15095 | } | |
15096 | else | |
15097 | { | |
15098 | FIELD_BITSIZE (*fp) = 0; | |
15099 | } | |
15100 | ||
15101 | /* Get bit offset of field. */ | |
74ac6d43 TT |
15102 | if (handle_data_member_location (die, cu, &offset)) |
15103 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 15104 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
435d3d88 | 15105 | if (attr != nullptr) |
c906108c | 15106 | { |
d5a22e77 | 15107 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
15108 | { |
15109 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
15110 | additional bit offset from the MSB of the containing |
15111 | anonymous object to the MSB of the field. We don't | |
15112 | have to do anything special since we don't need to | |
15113 | know the size of the anonymous object. */ | |
f41f5e61 | 15114 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
15115 | } |
15116 | else | |
15117 | { | |
15118 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
15119 | MSB of the anonymous object, subtract off the number of |
15120 | bits from the MSB of the field to the MSB of the | |
15121 | object, and then subtract off the number of bits of | |
15122 | the field itself. The result is the bit offset of | |
15123 | the LSB of the field. */ | |
c906108c SS |
15124 | int anonymous_size; |
15125 | int bit_offset = DW_UNSND (attr); | |
15126 | ||
e142c38c | 15127 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15128 | if (attr != nullptr) |
c906108c SS |
15129 | { |
15130 | /* The size of the anonymous object containing | |
15131 | the bit field is explicit, so use the | |
15132 | indicated size (in bytes). */ | |
15133 | anonymous_size = DW_UNSND (attr); | |
15134 | } | |
15135 | else | |
15136 | { | |
15137 | /* The size of the anonymous object containing | |
15138 | the bit field must be inferred from the type | |
15139 | attribute of the data member containing the | |
15140 | bit field. */ | |
15141 | anonymous_size = TYPE_LENGTH (fp->type); | |
15142 | } | |
f41f5e61 PA |
15143 | SET_FIELD_BITPOS (*fp, |
15144 | (FIELD_BITPOS (*fp) | |
15145 | + anonymous_size * bits_per_byte | |
15146 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
15147 | } |
15148 | } | |
da5b30da AA |
15149 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
15150 | if (attr != NULL) | |
15151 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
15152 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
15153 | |
15154 | /* Get name of field. */ | |
39cbfefa DJ |
15155 | fieldname = dwarf2_name (die, cu); |
15156 | if (fieldname == NULL) | |
15157 | fieldname = ""; | |
d8151005 DJ |
15158 | |
15159 | /* The name is already allocated along with this objfile, so we don't | |
15160 | need to duplicate it for the type. */ | |
15161 | fp->name = fieldname; | |
c906108c SS |
15162 | |
15163 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 15164 | pointer or virtual base class pointer) to private. */ |
e142c38c | 15165 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 15166 | { |
d48cc9dd | 15167 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
15168 | new_field->accessibility = DW_ACCESS_private; |
15169 | fip->non_public_fields = 1; | |
15170 | } | |
15171 | } | |
a9a9bd0f | 15172 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 15173 | { |
a9a9bd0f DC |
15174 | /* C++ static member. */ |
15175 | ||
15176 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
15177 | is a declaration, but all versions of G++ as of this writing | |
15178 | (so through at least 3.2.1) incorrectly generate | |
15179 | DW_TAG_variable tags. */ | |
6e70227d | 15180 | |
ff355380 | 15181 | const char *physname; |
c906108c | 15182 | |
a9a9bd0f | 15183 | /* Get name of field. */ |
39cbfefa DJ |
15184 | fieldname = dwarf2_name (die, cu); |
15185 | if (fieldname == NULL) | |
c906108c SS |
15186 | return; |
15187 | ||
254e6b9e | 15188 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
15189 | if (attr |
15190 | /* Only create a symbol if this is an external value. | |
15191 | new_symbol checks this and puts the value in the global symbol | |
15192 | table, which we want. If it is not external, new_symbol | |
15193 | will try to put the value in cu->list_in_scope which is wrong. */ | |
15194 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
15195 | { |
15196 | /* A static const member, not much different than an enum as far as | |
15197 | we're concerned, except that we can support more types. */ | |
15198 | new_symbol (die, NULL, cu); | |
15199 | } | |
15200 | ||
2df3850c | 15201 | /* Get physical name. */ |
ff355380 | 15202 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 15203 | |
d8151005 DJ |
15204 | /* The name is already allocated along with this objfile, so we don't |
15205 | need to duplicate it for the type. */ | |
15206 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 15207 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 15208 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
15209 | } |
15210 | else if (die->tag == DW_TAG_inheritance) | |
15211 | { | |
74ac6d43 | 15212 | LONGEST offset; |
d4b96c9a | 15213 | |
74ac6d43 TT |
15214 | /* C++ base class field. */ |
15215 | if (handle_data_member_location (die, cu, &offset)) | |
15216 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 15217 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 15218 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 15219 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 15220 | } |
2ddeaf8a TT |
15221 | else if (die->tag == DW_TAG_variant_part) |
15222 | { | |
15223 | /* process_structure_scope will treat this DIE as a union. */ | |
15224 | process_structure_scope (die, cu); | |
15225 | ||
15226 | /* The variant part is relative to the start of the enclosing | |
15227 | structure. */ | |
15228 | SET_FIELD_BITPOS (*fp, 0); | |
15229 | fp->type = get_die_type (die, cu); | |
15230 | fp->artificial = 1; | |
15231 | fp->name = "<<variant>>"; | |
c8c81635 TT |
15232 | |
15233 | /* Normally a DW_TAG_variant_part won't have a size, but our | |
15234 | representation requires one, so set it to the maximum of the | |
489dbda6 TT |
15235 | child sizes, being sure to account for the offset at which |
15236 | each child is seen. */ | |
c8c81635 TT |
15237 | if (TYPE_LENGTH (fp->type) == 0) |
15238 | { | |
15239 | unsigned max = 0; | |
15240 | for (int i = 0; i < TYPE_NFIELDS (fp->type); ++i) | |
489dbda6 TT |
15241 | { |
15242 | unsigned len = ((TYPE_FIELD_BITPOS (fp->type, i) + 7) / 8 | |
15243 | + TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i))); | |
15244 | if (len > max) | |
15245 | max = len; | |
15246 | } | |
c8c81635 TT |
15247 | TYPE_LENGTH (fp->type) = max; |
15248 | } | |
2ddeaf8a TT |
15249 | } |
15250 | else | |
15251 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
15252 | } |
15253 | ||
883fd55a KS |
15254 | /* Can the type given by DIE define another type? */ |
15255 | ||
15256 | static bool | |
15257 | type_can_define_types (const struct die_info *die) | |
15258 | { | |
15259 | switch (die->tag) | |
15260 | { | |
15261 | case DW_TAG_typedef: | |
15262 | case DW_TAG_class_type: | |
15263 | case DW_TAG_structure_type: | |
15264 | case DW_TAG_union_type: | |
15265 | case DW_TAG_enumeration_type: | |
15266 | return true; | |
15267 | ||
15268 | default: | |
15269 | return false; | |
15270 | } | |
15271 | } | |
15272 | ||
15273 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
15274 | |
15275 | static void | |
883fd55a KS |
15276 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
15277 | struct dwarf2_cu *cu) | |
6e70227d | 15278 | { |
be2daae6 TT |
15279 | struct decl_field fp; |
15280 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 15281 | |
883fd55a | 15282 | gdb_assert (type_can_define_types (die)); |
98751a41 | 15283 | |
883fd55a | 15284 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
15285 | fp.name = dwarf2_name (die, cu); |
15286 | fp.type = read_type_die (die, cu); | |
98751a41 | 15287 | |
c191a687 KS |
15288 | /* Save accessibility. */ |
15289 | enum dwarf_access_attribute accessibility; | |
15290 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
15291 | if (attr != NULL) | |
15292 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
15293 | else | |
15294 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15295 | switch (accessibility) | |
15296 | { | |
15297 | case DW_ACCESS_public: | |
15298 | /* The assumed value if neither private nor protected. */ | |
15299 | break; | |
15300 | case DW_ACCESS_private: | |
be2daae6 | 15301 | fp.is_private = 1; |
c191a687 KS |
15302 | break; |
15303 | case DW_ACCESS_protected: | |
be2daae6 | 15304 | fp.is_protected = 1; |
c191a687 KS |
15305 | break; |
15306 | default: | |
b98664d3 | 15307 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
15308 | } |
15309 | ||
883fd55a | 15310 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 15311 | fip->typedef_field_list.push_back (fp); |
883fd55a | 15312 | else |
be2daae6 | 15313 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
15314 | } |
15315 | ||
c906108c SS |
15316 | /* Create the vector of fields, and attach it to the type. */ |
15317 | ||
15318 | static void | |
fba45db2 | 15319 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15320 | struct dwarf2_cu *cu) |
c906108c SS |
15321 | { |
15322 | int nfields = fip->nfields; | |
15323 | ||
15324 | /* Record the field count, allocate space for the array of fields, | |
15325 | and create blank accessibility bitfields if necessary. */ | |
15326 | TYPE_NFIELDS (type) = nfields; | |
15327 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 15328 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 15329 | |
b4ba55a1 | 15330 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
15331 | { |
15332 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15333 | ||
15334 | TYPE_FIELD_PRIVATE_BITS (type) = | |
15335 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15336 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
15337 | ||
15338 | TYPE_FIELD_PROTECTED_BITS (type) = | |
15339 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15340 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
15341 | ||
774b6a14 TT |
15342 | TYPE_FIELD_IGNORE_BITS (type) = |
15343 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
15344 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
15345 | } |
15346 | ||
15347 | /* If the type has baseclasses, allocate and clear a bit vector for | |
15348 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 15349 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 15350 | { |
be2daae6 | 15351 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 15352 | unsigned char *pointer; |
c906108c SS |
15353 | |
15354 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 15355 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 15356 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
15357 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
15358 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
15359 | } |
15360 | ||
2ddeaf8a TT |
15361 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
15362 | { | |
15363 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
15364 | ||
be2daae6 | 15365 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 15366 | { |
be2daae6 TT |
15367 | struct nextfield &field = fip->fields[index]; |
15368 | ||
15369 | if (field.variant.is_discriminant) | |
2ddeaf8a | 15370 | di->discriminant_index = index; |
be2daae6 | 15371 | else if (field.variant.default_branch) |
2ddeaf8a TT |
15372 | di->default_index = index; |
15373 | else | |
be2daae6 | 15374 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
15375 | } |
15376 | } | |
15377 | ||
be2daae6 TT |
15378 | /* Copy the saved-up fields into the field vector. */ |
15379 | for (int i = 0; i < nfields; ++i) | |
c906108c | 15380 | { |
be2daae6 TT |
15381 | struct nextfield &field |
15382 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
15383 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 15384 | |
be2daae6 TT |
15385 | TYPE_FIELD (type, i) = field.field; |
15386 | switch (field.accessibility) | |
c906108c | 15387 | { |
c5aa993b | 15388 | case DW_ACCESS_private: |
b4ba55a1 | 15389 | if (cu->language != language_ada) |
be2daae6 | 15390 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 15391 | break; |
c906108c | 15392 | |
c5aa993b | 15393 | case DW_ACCESS_protected: |
b4ba55a1 | 15394 | if (cu->language != language_ada) |
be2daae6 | 15395 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 15396 | break; |
c906108c | 15397 | |
c5aa993b JM |
15398 | case DW_ACCESS_public: |
15399 | break; | |
c906108c | 15400 | |
c5aa993b JM |
15401 | default: |
15402 | /* Unknown accessibility. Complain and treat it as public. */ | |
15403 | { | |
b98664d3 | 15404 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 15405 | field.accessibility); |
c5aa993b JM |
15406 | } |
15407 | break; | |
c906108c | 15408 | } |
be2daae6 | 15409 | if (i < fip->baseclasses.size ()) |
c906108c | 15410 | { |
be2daae6 | 15411 | switch (field.virtuality) |
c906108c | 15412 | { |
c5aa993b JM |
15413 | case DW_VIRTUALITY_virtual: |
15414 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 15415 | if (cu->language == language_ada) |
a73c6dcd | 15416 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 15417 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 15418 | break; |
c906108c SS |
15419 | } |
15420 | } | |
c906108c SS |
15421 | } |
15422 | } | |
15423 | ||
7d27a96d TT |
15424 | /* Return true if this member function is a constructor, false |
15425 | otherwise. */ | |
15426 | ||
15427 | static int | |
15428 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
15429 | { | |
15430 | const char *fieldname; | |
fe978cb0 | 15431 | const char *type_name; |
7d27a96d TT |
15432 | int len; |
15433 | ||
15434 | if (die->parent == NULL) | |
15435 | return 0; | |
15436 | ||
15437 | if (die->parent->tag != DW_TAG_structure_type | |
15438 | && die->parent->tag != DW_TAG_union_type | |
15439 | && die->parent->tag != DW_TAG_class_type) | |
15440 | return 0; | |
15441 | ||
15442 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
15443 | type_name = dwarf2_name (die->parent, cu); |
15444 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
15445 | return 0; |
15446 | ||
15447 | len = strlen (fieldname); | |
fe978cb0 PA |
15448 | return (strncmp (fieldname, type_name, len) == 0 |
15449 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
15450 | } |
15451 | ||
e35000a7 TBA |
15452 | /* Check if the given VALUE is a recognized enum |
15453 | dwarf_defaulted_attribute constant according to DWARF5 spec, | |
15454 | Table 7.24. */ | |
15455 | ||
15456 | static bool | |
15457 | is_valid_DW_AT_defaulted (ULONGEST value) | |
15458 | { | |
15459 | switch (value) | |
15460 | { | |
15461 | case DW_DEFAULTED_no: | |
15462 | case DW_DEFAULTED_in_class: | |
15463 | case DW_DEFAULTED_out_of_class: | |
15464 | return true; | |
15465 | } | |
15466 | ||
3142e908 | 15467 | complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value)); |
e35000a7 TBA |
15468 | return false; |
15469 | } | |
15470 | ||
c906108c SS |
15471 | /* Add a member function to the proper fieldlist. */ |
15472 | ||
15473 | static void | |
107d2387 | 15474 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 15475 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 15476 | { |
518817b3 | 15477 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15478 | struct attribute *attr; |
c906108c | 15479 | int i; |
be2daae6 | 15480 | struct fnfieldlist *flp = nullptr; |
c906108c | 15481 | struct fn_field *fnp; |
15d034d0 | 15482 | const char *fieldname; |
f792889a | 15483 | struct type *this_type; |
60d5a603 | 15484 | enum dwarf_access_attribute accessibility; |
c906108c | 15485 | |
b4ba55a1 | 15486 | if (cu->language == language_ada) |
a73c6dcd | 15487 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 15488 | |
2df3850c | 15489 | /* Get name of member function. */ |
39cbfefa DJ |
15490 | fieldname = dwarf2_name (die, cu); |
15491 | if (fieldname == NULL) | |
2df3850c | 15492 | return; |
c906108c | 15493 | |
c906108c | 15494 | /* Look up member function name in fieldlist. */ |
be2daae6 | 15495 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15496 | { |
27bfe10e | 15497 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
15498 | { |
15499 | flp = &fip->fnfieldlists[i]; | |
15500 | break; | |
15501 | } | |
c906108c SS |
15502 | } |
15503 | ||
be2daae6 TT |
15504 | /* Create a new fnfieldlist if necessary. */ |
15505 | if (flp == nullptr) | |
c906108c | 15506 | { |
be2daae6 TT |
15507 | fip->fnfieldlists.emplace_back (); |
15508 | flp = &fip->fnfieldlists.back (); | |
c906108c | 15509 | flp->name = fieldname; |
be2daae6 | 15510 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
15511 | } |
15512 | ||
be2daae6 TT |
15513 | /* Create a new member function field and add it to the vector of |
15514 | fnfieldlists. */ | |
15515 | flp->fnfields.emplace_back (); | |
15516 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
15517 | |
15518 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 15519 | if (cu->language == language_cplus) |
be2daae6 TT |
15520 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
15521 | die, cu); | |
3da10d80 KS |
15522 | else |
15523 | { | |
1d06ead6 | 15524 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
15525 | fnp->physname = physname ? physname : ""; |
15526 | } | |
15527 | ||
c906108c | 15528 | fnp->type = alloc_type (objfile); |
f792889a DJ |
15529 | this_type = read_type_die (die, cu); |
15530 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 15531 | { |
f792889a | 15532 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 15533 | |
f792889a | 15534 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15535 | of the method itself (TYPE_CODE_METHOD). */ |
15536 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
15537 | TYPE_TARGET_TYPE (this_type), |
15538 | TYPE_FIELDS (this_type), | |
15539 | TYPE_NFIELDS (this_type), | |
15540 | TYPE_VARARGS (this_type)); | |
c906108c SS |
15541 | |
15542 | /* Handle static member functions. | |
c5aa993b | 15543 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
15544 | member functions. G++ helps GDB by marking the first |
15545 | parameter for non-static member functions (which is the this | |
15546 | pointer) as artificial. We obtain this information from | |
15547 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15548 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15549 | fnp->voffset = VOFFSET_STATIC; |
15550 | } | |
15551 | else | |
b98664d3 | 15552 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 15553 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15554 | |
15555 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15556 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15557 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15558 | |
3e43a32a MS |
15559 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15560 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15561 | |
15562 | /* Get accessibility. */ | |
e142c38c | 15563 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 15564 | if (attr != nullptr) |
aead7601 | 15565 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
15566 | else |
15567 | accessibility = dwarf2_default_access_attribute (die, cu); | |
15568 | switch (accessibility) | |
c906108c | 15569 | { |
60d5a603 JK |
15570 | case DW_ACCESS_private: |
15571 | fnp->is_private = 1; | |
15572 | break; | |
15573 | case DW_ACCESS_protected: | |
15574 | fnp->is_protected = 1; | |
15575 | break; | |
c906108c SS |
15576 | } |
15577 | ||
b02dede2 | 15578 | /* Check for artificial methods. */ |
e142c38c | 15579 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
15580 | if (attr && DW_UNSND (attr) != 0) |
15581 | fnp->is_artificial = 1; | |
15582 | ||
e35000a7 TBA |
15583 | /* Check for defaulted methods. */ |
15584 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
15585 | if (attr != nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr))) | |
15586 | fnp->defaulted = (enum dwarf_defaulted_attribute) DW_UNSND (attr); | |
15587 | ||
15588 | /* Check for deleted methods. */ | |
15589 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
15590 | if (attr != nullptr && DW_UNSND (attr) != 0) | |
15591 | fnp->is_deleted = 1; | |
15592 | ||
7d27a96d TT |
15593 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15594 | ||
0d564a31 | 15595 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15596 | function. For older versions of GCC, this is an offset in the |
15597 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15598 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15599 | to the object address. */ |
15600 | ||
e142c38c | 15601 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 15602 | if (attr != nullptr) |
8e19ed76 | 15603 | { |
aec5aa8b | 15604 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 15605 | { |
aec5aa8b TT |
15606 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
15607 | { | |
15608 | /* Old-style GCC. */ | |
15609 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
15610 | } | |
15611 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
15612 | || (DW_BLOCK (attr)->size > 1 | |
15613 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
15614 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
15615 | { | |
aec5aa8b TT |
15616 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
15617 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
15618 | dwarf2_complex_location_expr_complaint (); | |
15619 | else | |
15620 | fnp->voffset /= cu->header.addr_size; | |
15621 | fnp->voffset += 2; | |
15622 | } | |
15623 | else | |
15624 | dwarf2_complex_location_expr_complaint (); | |
15625 | ||
15626 | if (!fnp->fcontext) | |
7e993ebf KS |
15627 | { |
15628 | /* If there is no `this' field and no DW_AT_containing_type, | |
15629 | we cannot actually find a base class context for the | |
15630 | vtable! */ | |
15631 | if (TYPE_NFIELDS (this_type) == 0 | |
15632 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
15633 | { | |
b98664d3 | 15634 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15635 | "function \"%s\" (offset %s)"), |
15636 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15637 | } |
15638 | else | |
15639 | { | |
15640 | fnp->fcontext | |
15641 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
15642 | } | |
15643 | } | |
aec5aa8b | 15644 | } |
3690dd37 | 15645 | else if (attr_form_is_section_offset (attr)) |
8e19ed76 | 15646 | { |
4d3c2250 | 15647 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
15648 | } |
15649 | else | |
15650 | { | |
4d3c2250 KB |
15651 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15652 | fieldname); | |
8e19ed76 | 15653 | } |
0d564a31 | 15654 | } |
d48cc9dd DJ |
15655 | else |
15656 | { | |
15657 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
15658 | if (attr && DW_UNSND (attr)) | |
15659 | { | |
15660 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15661 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15662 | "but the vtable offset is not specified"), |
9d8780f0 | 15663 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15664 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15665 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15666 | } | |
15667 | } | |
c906108c SS |
15668 | } |
15669 | ||
15670 | /* Create the vector of member function fields, and attach it to the type. */ | |
15671 | ||
15672 | static void | |
fba45db2 | 15673 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15674 | struct dwarf2_cu *cu) |
c906108c | 15675 | { |
b4ba55a1 | 15676 | if (cu->language == language_ada) |
a73c6dcd | 15677 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15678 | |
c906108c SS |
15679 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15680 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15681 | TYPE_ALLOC (type, |
15682 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15683 | |
be2daae6 | 15684 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15685 | { |
be2daae6 | 15686 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15687 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15688 | |
be2daae6 TT |
15689 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15690 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15691 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15692 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15693 | ||
15694 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15695 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15696 | } |
15697 | ||
be2daae6 | 15698 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15699 | } |
15700 | ||
1168df01 JB |
15701 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15702 | language, zero otherwise. */ | |
15703 | static int | |
15704 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15705 | { | |
15706 | static const char vptr[] = "_vptr"; | |
15707 | ||
9c37b5ae TT |
15708 | /* Look for the C++ form of the vtable. */ |
15709 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15710 | return 1; |
15711 | ||
15712 | return 0; | |
15713 | } | |
15714 | ||
c0dd20ea | 15715 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15716 | functions, with the ABI-specified layout. If TYPE describes |
15717 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15718 | |
15719 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15720 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15721 | |
0b92b5bb TT |
15722 | static void |
15723 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15724 | { |
09e2d7c7 | 15725 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15726 | |
15727 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
15728 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
15729 | return; | |
c0dd20ea DJ |
15730 | |
15731 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15732 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15733 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15734 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15735 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15736 | return; | |
c0dd20ea DJ |
15737 | |
15738 | /* Find the type of the method. */ | |
0b92b5bb | 15739 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
15740 | if (pfn_type == NULL |
15741 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
15742 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 15743 | return; |
c0dd20ea DJ |
15744 | |
15745 | /* Look for the "this" argument. */ | |
15746 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
15747 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 15748 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 15749 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 15750 | return; |
c0dd20ea | 15751 | |
09e2d7c7 | 15752 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 15753 | new_type = alloc_type (objfile); |
09e2d7c7 | 15754 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
15755 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
15756 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 15757 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15758 | } |
1168df01 | 15759 | |
2b4424c3 TT |
15760 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15761 | appropriate error checking and issuing complaints if there is a | |
15762 | problem. */ | |
15763 | ||
15764 | static ULONGEST | |
15765 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15766 | { | |
15767 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15768 | ||
15769 | if (attr == nullptr) | |
15770 | return 0; | |
15771 | ||
15772 | if (!attr_form_is_constant (attr)) | |
15773 | { | |
b98664d3 | 15774 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15775 | " - DIE at %s [in module %s]"), |
15776 | sect_offset_str (die->sect_off), | |
15777 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15778 | return 0; | |
15779 | } | |
15780 | ||
15781 | ULONGEST align; | |
15782 | if (attr->form == DW_FORM_sdata) | |
15783 | { | |
15784 | LONGEST val = DW_SND (attr); | |
15785 | if (val < 0) | |
15786 | { | |
b98664d3 | 15787 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
15788 | " - DIE at %s [in module %s]"), |
15789 | sect_offset_str (die->sect_off), | |
15790 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15791 | return 0; | |
15792 | } | |
15793 | align = val; | |
15794 | } | |
15795 | else | |
15796 | align = DW_UNSND (attr); | |
15797 | ||
15798 | if (align == 0) | |
15799 | { | |
b98664d3 | 15800 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15801 | " - DIE at %s [in module %s]"), |
15802 | sect_offset_str (die->sect_off), | |
15803 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15804 | return 0; | |
15805 | } | |
15806 | if ((align & (align - 1)) != 0) | |
15807 | { | |
b98664d3 | 15808 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15809 | " - DIE at %s [in module %s]"), |
15810 | sect_offset_str (die->sect_off), | |
15811 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15812 | return 0; | |
15813 | } | |
15814 | ||
15815 | return align; | |
15816 | } | |
15817 | ||
15818 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15819 | the alignment for TYPE. */ | |
15820 | ||
15821 | static void | |
15822 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15823 | struct type *type) | |
15824 | { | |
15825 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15826 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15827 | " - DIE at %s [in module %s]"), |
15828 | sect_offset_str (die->sect_off), | |
15829 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15830 | } | |
685b1105 | 15831 | |
e35000a7 TBA |
15832 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15833 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
15834 | ||
15835 | static bool | |
15836 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
15837 | { | |
15838 | switch (value) | |
15839 | { | |
15840 | case DW_CC_normal: | |
15841 | case DW_CC_pass_by_reference: | |
15842 | case DW_CC_pass_by_value: | |
15843 | return true; | |
15844 | ||
15845 | default: | |
15846 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15847 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
15848 | return false; |
15849 | } | |
15850 | } | |
15851 | ||
d0922fcf TBA |
15852 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15853 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
15854 | also according to GNU-specific values (see include/dwarf2.h). */ | |
15855 | ||
15856 | static bool | |
15857 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
15858 | { | |
15859 | switch (value) | |
15860 | { | |
15861 | case DW_CC_normal: | |
15862 | case DW_CC_program: | |
15863 | case DW_CC_nocall: | |
15864 | return true; | |
15865 | ||
15866 | case DW_CC_GNU_renesas_sh: | |
15867 | case DW_CC_GNU_borland_fastcall_i386: | |
15868 | case DW_CC_GDB_IBM_OpenCL: | |
15869 | return true; | |
15870 | ||
15871 | default: | |
15872 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15873 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15874 | return false; |
15875 | } | |
15876 | } | |
15877 | ||
c906108c | 15878 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15879 | (definition) to create a type for the structure or union. Fill in |
15880 | the type's name and general properties; the members will not be | |
83655187 DE |
15881 | processed until process_structure_scope. A symbol table entry for |
15882 | the type will also not be done until process_structure_scope (assuming | |
15883 | the type has a name). | |
c906108c | 15884 | |
c767944b DJ |
15885 | NOTE: we need to call these functions regardless of whether or not the |
15886 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15887 | structure or union. This gets the type entered into our set of |
83655187 | 15888 | user defined types. */ |
c906108c | 15889 | |
f792889a | 15890 | static struct type * |
134d01f1 | 15891 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15892 | { |
518817b3 | 15893 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15894 | struct type *type; |
15895 | struct attribute *attr; | |
15d034d0 | 15896 | const char *name; |
c906108c | 15897 | |
348e048f DE |
15898 | /* If the definition of this type lives in .debug_types, read that type. |
15899 | Don't follow DW_AT_specification though, that will take us back up | |
15900 | the chain and we want to go down. */ | |
45e58e77 | 15901 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15902 | if (attr != nullptr) |
348e048f | 15903 | { |
ac9ec31b | 15904 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15905 | |
ac9ec31b | 15906 | /* The type's CU may not be the same as CU. |
02142a6c | 15907 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15908 | return set_die_type (die, type, cu); |
15909 | } | |
15910 | ||
c0dd20ea | 15911 | type = alloc_type (objfile); |
c906108c | 15912 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15913 | |
39cbfefa DJ |
15914 | name = dwarf2_name (die, cu); |
15915 | if (name != NULL) | |
c906108c | 15916 | { |
987504bb | 15917 | if (cu->language == language_cplus |
c44af4eb TT |
15918 | || cu->language == language_d |
15919 | || cu->language == language_rust) | |
63d06c5c | 15920 | { |
15d034d0 | 15921 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15922 | |
15923 | /* dwarf2_full_name might have already finished building the DIE's | |
15924 | type. If so, there is no need to continue. */ | |
15925 | if (get_die_type (die, cu) != NULL) | |
15926 | return get_die_type (die, cu); | |
15927 | ||
e86ca25f | 15928 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15929 | } |
15930 | else | |
15931 | { | |
d8151005 DJ |
15932 | /* The name is already allocated along with this objfile, so |
15933 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15934 | TYPE_NAME (type) = name; |
63d06c5c | 15935 | } |
c906108c SS |
15936 | } |
15937 | ||
15938 | if (die->tag == DW_TAG_structure_type) | |
15939 | { | |
15940 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15941 | } | |
15942 | else if (die->tag == DW_TAG_union_type) | |
15943 | { | |
15944 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15945 | } | |
2ddeaf8a TT |
15946 | else if (die->tag == DW_TAG_variant_part) |
15947 | { | |
15948 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15949 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15950 | } | |
c906108c SS |
15951 | else |
15952 | { | |
4753d33b | 15953 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15954 | } |
15955 | ||
0cc2414c TT |
15956 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15957 | TYPE_DECLARED_CLASS (type) = 1; | |
15958 | ||
e35000a7 TBA |
15959 | /* Store the calling convention in the type if it's available in |
15960 | the die. Otherwise the calling convention remains set to | |
15961 | the default value DW_CC_normal. */ | |
15962 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15963 | if (attr != nullptr | |
15964 | && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) | |
15965 | { | |
15966 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15967 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
15968 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
15969 | } | |
15970 | ||
e142c38c | 15971 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15972 | if (attr != nullptr) |
c906108c | 15973 | { |
155bfbd3 JB |
15974 | if (attr_form_is_constant (attr)) |
15975 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15976 | else | |
15977 | { | |
15978 | /* For the moment, dynamic type sizes are not supported | |
15979 | by GDB's struct type. The actual size is determined | |
15980 | on-demand when resolving the type of a given object, | |
15981 | so set the type's length to zero for now. Otherwise, | |
15982 | we record an expression as the length, and that expression | |
15983 | could lead to a very large value, which could eventually | |
15984 | lead to us trying to allocate that much memory when creating | |
15985 | a value of that type. */ | |
15986 | TYPE_LENGTH (type) = 0; | |
15987 | } | |
c906108c SS |
15988 | } |
15989 | else | |
15990 | { | |
15991 | TYPE_LENGTH (type) = 0; | |
15992 | } | |
15993 | ||
2b4424c3 TT |
15994 | maybe_set_alignment (cu, die, type); |
15995 | ||
5230b05a | 15996 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15997 | { |
5230b05a WT |
15998 | /* ICC<14 does not output the required DW_AT_declaration on |
15999 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 16000 | TYPE_STUB (type) = 1; |
685b1105 JK |
16001 | } |
16002 | else | |
16003 | TYPE_STUB_SUPPORTED (type) = 1; | |
16004 | ||
dc718098 | 16005 | if (die_is_declaration (die, cu)) |
876cecd0 | 16006 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
16007 | else if (attr == NULL && die->child == NULL |
16008 | && producer_is_realview (cu->producer)) | |
16009 | /* RealView does not output the required DW_AT_declaration | |
16010 | on incomplete types. */ | |
16011 | TYPE_STUB (type) = 1; | |
dc718098 | 16012 | |
c906108c SS |
16013 | /* We need to add the type field to the die immediately so we don't |
16014 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 16015 | type within the structure itself. */ |
1c379e20 | 16016 | set_die_type (die, type, cu); |
c906108c | 16017 | |
7e314c57 JK |
16018 | /* set_die_type should be already done. */ |
16019 | set_descriptive_type (type, die, cu); | |
16020 | ||
c767944b DJ |
16021 | return type; |
16022 | } | |
16023 | ||
2ddeaf8a TT |
16024 | /* A helper for process_structure_scope that handles a single member |
16025 | DIE. */ | |
16026 | ||
16027 | static void | |
16028 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
16029 | struct field_info *fi, | |
16030 | std::vector<struct symbol *> *template_args, | |
16031 | struct dwarf2_cu *cu) | |
16032 | { | |
16033 | if (child_die->tag == DW_TAG_member | |
16034 | || child_die->tag == DW_TAG_variable | |
16035 | || child_die->tag == DW_TAG_variant_part) | |
16036 | { | |
16037 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
16038 | should be a DW_TAG_member that is a declaration, but | |
16039 | all versions of G++ as of this writing (so through at | |
16040 | least 3.2.1) incorrectly generate DW_TAG_variable | |
16041 | tags for them instead. */ | |
16042 | dwarf2_add_field (fi, child_die, cu); | |
16043 | } | |
16044 | else if (child_die->tag == DW_TAG_subprogram) | |
16045 | { | |
16046 | /* Rust doesn't have member functions in the C++ sense. | |
16047 | However, it does emit ordinary functions as children | |
16048 | of a struct DIE. */ | |
16049 | if (cu->language == language_rust) | |
16050 | read_func_scope (child_die, cu); | |
16051 | else | |
16052 | { | |
16053 | /* C++ member function. */ | |
16054 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
16055 | } | |
16056 | } | |
16057 | else if (child_die->tag == DW_TAG_inheritance) | |
16058 | { | |
16059 | /* C++ base class field. */ | |
16060 | dwarf2_add_field (fi, child_die, cu); | |
16061 | } | |
16062 | else if (type_can_define_types (child_die)) | |
16063 | dwarf2_add_type_defn (fi, child_die, cu); | |
16064 | else if (child_die->tag == DW_TAG_template_type_param | |
16065 | || child_die->tag == DW_TAG_template_value_param) | |
16066 | { | |
16067 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
16068 | ||
16069 | if (arg != NULL) | |
16070 | template_args->push_back (arg); | |
16071 | } | |
16072 | else if (child_die->tag == DW_TAG_variant) | |
16073 | { | |
16074 | /* In a variant we want to get the discriminant and also add a | |
16075 | field for our sole member child. */ | |
16076 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
16077 | ||
bde09ab7 | 16078 | for (die_info *variant_child = child_die->child; |
2ddeaf8a TT |
16079 | variant_child != NULL; |
16080 | variant_child = sibling_die (variant_child)) | |
16081 | { | |
16082 | if (variant_child->tag == DW_TAG_member) | |
16083 | { | |
16084 | handle_struct_member_die (variant_child, type, fi, | |
16085 | template_args, cu); | |
16086 | /* Only handle the one. */ | |
16087 | break; | |
16088 | } | |
16089 | } | |
16090 | ||
16091 | /* We don't handle this but we might as well report it if we see | |
16092 | it. */ | |
16093 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 16094 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
16095 | " - DIE at %s [in module %s]"), |
16096 | sect_offset_str (child_die->sect_off), | |
16097 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16098 | ||
16099 | /* The first field was just added, so we can stash the | |
16100 | discriminant there. */ | |
be2daae6 | 16101 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 16102 | if (discr == NULL) |
be2daae6 | 16103 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 16104 | else |
be2daae6 | 16105 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
16106 | } |
16107 | } | |
16108 | ||
c767944b DJ |
16109 | /* Finish creating a structure or union type, including filling in |
16110 | its members and creating a symbol for it. */ | |
16111 | ||
16112 | static void | |
16113 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16114 | { | |
518817b3 | 16115 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 16116 | struct die_info *child_die; |
c767944b DJ |
16117 | struct type *type; |
16118 | ||
16119 | type = get_die_type (die, cu); | |
16120 | if (type == NULL) | |
16121 | type = read_structure_type (die, cu); | |
16122 | ||
2ddeaf8a TT |
16123 | /* When reading a DW_TAG_variant_part, we need to notice when we |
16124 | read the discriminant member, so we can record it later in the | |
16125 | discriminant_info. */ | |
16126 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
feee869b | 16127 | sect_offset discr_offset {}; |
3e1d3d8c | 16128 | bool has_template_parameters = false; |
2ddeaf8a TT |
16129 | |
16130 | if (is_variant_part) | |
16131 | { | |
16132 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
16133 | if (discr == NULL) | |
16134 | { | |
16135 | /* Maybe it's a univariant form, an extension we support. | |
16136 | In this case arrange not to check the offset. */ | |
16137 | is_variant_part = false; | |
16138 | } | |
16139 | else if (attr_form_is_ref (discr)) | |
16140 | { | |
16141 | struct dwarf2_cu *target_cu = cu; | |
16142 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
16143 | ||
16144 | discr_offset = target_die->sect_off; | |
16145 | } | |
16146 | else | |
16147 | { | |
b98664d3 | 16148 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
16149 | " - DIE at %s [in module %s]"), |
16150 | sect_offset_str (die->sect_off), | |
16151 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16152 | is_variant_part = false; | |
16153 | } | |
16154 | } | |
16155 | ||
e142c38c | 16156 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
16157 | { |
16158 | struct field_info fi; | |
2f4732b0 | 16159 | std::vector<struct symbol *> template_args; |
c906108c | 16160 | |
639d11d3 | 16161 | child_die = die->child; |
c906108c SS |
16162 | |
16163 | while (child_die && child_die->tag) | |
16164 | { | |
2ddeaf8a | 16165 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 16166 | |
2ddeaf8a | 16167 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 16168 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 16169 | |
c906108c SS |
16170 | child_die = sibling_die (child_die); |
16171 | } | |
16172 | ||
34eaf542 | 16173 | /* Attach template arguments to type. */ |
2f4732b0 | 16174 | if (!template_args.empty ()) |
34eaf542 | 16175 | { |
3e1d3d8c | 16176 | has_template_parameters = true; |
34eaf542 | 16177 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 16178 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 16179 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
16180 | = XOBNEWVEC (&objfile->objfile_obstack, |
16181 | struct symbol *, | |
16182 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 16183 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 16184 | template_args.data (), |
34eaf542 TT |
16185 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
16186 | * sizeof (struct symbol *))); | |
34eaf542 TT |
16187 | } |
16188 | ||
c906108c SS |
16189 | /* Attach fields and member functions to the type. */ |
16190 | if (fi.nfields) | |
e7c27a73 | 16191 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 16192 | if (!fi.fnfieldlists.empty ()) |
c906108c | 16193 | { |
e7c27a73 | 16194 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 16195 | |
c5aa993b | 16196 | /* Get the type which refers to the base class (possibly this |
c906108c | 16197 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
16198 | class from the DW_AT_containing_type attribute. This use of |
16199 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 16200 | |
e142c38c | 16201 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 16202 | { |
e7c27a73 | 16203 | struct type *t = die_containing_type (die, cu); |
c906108c | 16204 | |
ae6ae975 | 16205 | set_type_vptr_basetype (type, t); |
c906108c SS |
16206 | if (type == t) |
16207 | { | |
c906108c SS |
16208 | int i; |
16209 | ||
16210 | /* Our own class provides vtbl ptr. */ | |
16211 | for (i = TYPE_NFIELDS (t) - 1; | |
16212 | i >= TYPE_N_BASECLASSES (t); | |
16213 | --i) | |
16214 | { | |
0d5cff50 | 16215 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 16216 | |
1168df01 | 16217 | if (is_vtable_name (fieldname, cu)) |
c906108c | 16218 | { |
ae6ae975 | 16219 | set_type_vptr_fieldno (type, i); |
c906108c SS |
16220 | break; |
16221 | } | |
16222 | } | |
16223 | ||
16224 | /* Complain if virtual function table field not found. */ | |
16225 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 16226 | complaint (_("virtual function table pointer " |
3e43a32a | 16227 | "not found when defining class '%s'"), |
e86ca25f | 16228 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
16229 | } |
16230 | else | |
16231 | { | |
ae6ae975 | 16232 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
16233 | } |
16234 | } | |
f6235d4c | 16235 | else if (cu->producer |
61012eef | 16236 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
16237 | { |
16238 | /* The IBM XLC compiler does not provide direct indication | |
16239 | of the containing type, but the vtable pointer is | |
16240 | always named __vfp. */ | |
16241 | ||
16242 | int i; | |
16243 | ||
16244 | for (i = TYPE_NFIELDS (type) - 1; | |
16245 | i >= TYPE_N_BASECLASSES (type); | |
16246 | --i) | |
16247 | { | |
16248 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
16249 | { | |
ae6ae975 DE |
16250 | set_type_vptr_fieldno (type, i); |
16251 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
16252 | break; |
16253 | } | |
16254 | } | |
16255 | } | |
c906108c | 16256 | } |
98751a41 JK |
16257 | |
16258 | /* Copy fi.typedef_field_list linked list elements content into the | |
16259 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 16260 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 16261 | { |
be2daae6 | 16262 | int count = fi.typedef_field_list.size (); |
98751a41 | 16263 | |
a0d7a4ff | 16264 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 16265 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 16266 | = ((struct decl_field *) |
be2daae6 TT |
16267 | TYPE_ALLOC (type, |
16268 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
16269 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 16270 | |
be2daae6 TT |
16271 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
16272 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 16273 | } |
c767944b | 16274 | |
883fd55a KS |
16275 | /* Copy fi.nested_types_list linked list elements content into the |
16276 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 16277 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 16278 | { |
be2daae6 | 16279 | int count = fi.nested_types_list.size (); |
883fd55a KS |
16280 | |
16281 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
16282 | TYPE_NESTED_TYPES_ARRAY (type) | |
16283 | = ((struct decl_field *) | |
be2daae6 TT |
16284 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
16285 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 16286 | |
be2daae6 TT |
16287 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
16288 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 16289 | } |
c906108c | 16290 | } |
63d06c5c | 16291 | |
bb5ed363 | 16292 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
16293 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
16294 | cu->rust_unions.push_back (type); | |
0b92b5bb | 16295 | |
90aeadfc DC |
16296 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
16297 | snapshots) has been known to create a die giving a declaration | |
16298 | for a class that has, as a child, a die giving a definition for a | |
16299 | nested class. So we have to process our children even if the | |
16300 | current die is a declaration. Normally, of course, a declaration | |
16301 | won't have any children at all. */ | |
134d01f1 | 16302 | |
ca040673 DE |
16303 | child_die = die->child; |
16304 | ||
90aeadfc DC |
16305 | while (child_die != NULL && child_die->tag) |
16306 | { | |
16307 | if (child_die->tag == DW_TAG_member | |
16308 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
16309 | || child_die->tag == DW_TAG_inheritance |
16310 | || child_die->tag == DW_TAG_template_value_param | |
16311 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 16312 | { |
90aeadfc | 16313 | /* Do nothing. */ |
134d01f1 | 16314 | } |
90aeadfc DC |
16315 | else |
16316 | process_die (child_die, cu); | |
134d01f1 | 16317 | |
90aeadfc | 16318 | child_die = sibling_die (child_die); |
134d01f1 DJ |
16319 | } |
16320 | ||
fa4028e9 JB |
16321 | /* Do not consider external references. According to the DWARF standard, |
16322 | these DIEs are identified by the fact that they have no byte_size | |
16323 | attribute, and a declaration attribute. */ | |
16324 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
16325 | || !die_is_declaration (die, cu)) | |
3e1d3d8c TT |
16326 | { |
16327 | struct symbol *sym = new_symbol (die, type, cu); | |
16328 | ||
16329 | if (has_template_parameters) | |
16330 | { | |
a776957c TT |
16331 | struct symtab *symtab; |
16332 | if (sym != nullptr) | |
16333 | symtab = symbol_symtab (sym); | |
16334 | else if (cu->line_header != nullptr) | |
16335 | { | |
16336 | /* Any related symtab will do. */ | |
16337 | symtab | |
7ba99d21 | 16338 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
16339 | } |
16340 | else | |
16341 | { | |
16342 | symtab = nullptr; | |
16343 | complaint (_("could not find suitable " | |
16344 | "symtab for template parameter" | |
16345 | " - DIE at %s [in module %s]"), | |
16346 | sect_offset_str (die->sect_off), | |
16347 | objfile_name (objfile)); | |
16348 | } | |
16349 | ||
16350 | if (symtab != nullptr) | |
16351 | { | |
16352 | /* Make sure that the symtab is set on the new symbols. | |
16353 | Even though they don't appear in this symtab directly, | |
16354 | other parts of gdb assume that symbols do, and this is | |
16355 | reasonably true. */ | |
16356 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
16357 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
16358 | } | |
3e1d3d8c TT |
16359 | } |
16360 | } | |
134d01f1 DJ |
16361 | } |
16362 | ||
55426c9d JB |
16363 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
16364 | update TYPE using some information only available in DIE's children. */ | |
16365 | ||
16366 | static void | |
16367 | update_enumeration_type_from_children (struct die_info *die, | |
16368 | struct type *type, | |
16369 | struct dwarf2_cu *cu) | |
16370 | { | |
60f7655a | 16371 | struct die_info *child_die; |
55426c9d JB |
16372 | int unsigned_enum = 1; |
16373 | int flag_enum = 1; | |
16374 | ULONGEST mask = 0; | |
55426c9d | 16375 | |
8268c778 | 16376 | auto_obstack obstack; |
55426c9d | 16377 | |
60f7655a DE |
16378 | for (child_die = die->child; |
16379 | child_die != NULL && child_die->tag; | |
16380 | child_die = sibling_die (child_die)) | |
55426c9d JB |
16381 | { |
16382 | struct attribute *attr; | |
16383 | LONGEST value; | |
16384 | const gdb_byte *bytes; | |
16385 | struct dwarf2_locexpr_baton *baton; | |
16386 | const char *name; | |
60f7655a | 16387 | |
55426c9d JB |
16388 | if (child_die->tag != DW_TAG_enumerator) |
16389 | continue; | |
16390 | ||
16391 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
16392 | if (attr == NULL) | |
16393 | continue; | |
16394 | ||
16395 | name = dwarf2_name (child_die, cu); | |
16396 | if (name == NULL) | |
16397 | name = "<anonymous enumerator>"; | |
16398 | ||
16399 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
16400 | &value, &bytes, &baton); | |
16401 | if (value < 0) | |
16402 | { | |
16403 | unsigned_enum = 0; | |
16404 | flag_enum = 0; | |
16405 | } | |
16406 | else if ((mask & value) != 0) | |
16407 | flag_enum = 0; | |
16408 | else | |
16409 | mask |= value; | |
16410 | ||
16411 | /* If we already know that the enum type is neither unsigned, nor | |
16412 | a flag type, no need to look at the rest of the enumerates. */ | |
16413 | if (!unsigned_enum && !flag_enum) | |
16414 | break; | |
55426c9d JB |
16415 | } |
16416 | ||
16417 | if (unsigned_enum) | |
16418 | TYPE_UNSIGNED (type) = 1; | |
16419 | if (flag_enum) | |
16420 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
16421 | } |
16422 | ||
134d01f1 DJ |
16423 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16424 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16425 | |
f792889a | 16426 | static struct type * |
134d01f1 | 16427 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16428 | { |
518817b3 | 16429 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16430 | struct type *type; |
c906108c | 16431 | struct attribute *attr; |
0114d602 | 16432 | const char *name; |
134d01f1 | 16433 | |
348e048f DE |
16434 | /* If the definition of this type lives in .debug_types, read that type. |
16435 | Don't follow DW_AT_specification though, that will take us back up | |
16436 | the chain and we want to go down. */ | |
45e58e77 | 16437 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 16438 | if (attr != nullptr) |
348e048f | 16439 | { |
ac9ec31b | 16440 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16441 | |
ac9ec31b | 16442 | /* The type's CU may not be the same as CU. |
02142a6c | 16443 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16444 | return set_die_type (die, type, cu); |
16445 | } | |
16446 | ||
c906108c SS |
16447 | type = alloc_type (objfile); |
16448 | ||
16449 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 16450 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16451 | if (name != NULL) |
e86ca25f | 16452 | TYPE_NAME (type) = name; |
c906108c | 16453 | |
0626fc76 TT |
16454 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16455 | if (attr != NULL) | |
16456 | { | |
16457 | struct type *underlying_type = die_type (die, cu); | |
16458 | ||
16459 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16460 | } | |
16461 | ||
e142c38c | 16462 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16463 | if (attr != nullptr) |
c906108c SS |
16464 | { |
16465 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16466 | } | |
16467 | else | |
16468 | { | |
16469 | TYPE_LENGTH (type) = 0; | |
16470 | } | |
16471 | ||
2b4424c3 TT |
16472 | maybe_set_alignment (cu, die, type); |
16473 | ||
137033e9 JB |
16474 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16475 | declared as private in the package spec, and then defined only | |
16476 | inside the package body. Such types are known as Taft Amendment | |
16477 | Types. When another package uses such a type, an incomplete DIE | |
16478 | may be generated by the compiler. */ | |
02eb380e | 16479 | if (die_is_declaration (die, cu)) |
876cecd0 | 16480 | TYPE_STUB (type) = 1; |
02eb380e | 16481 | |
0626fc76 TT |
16482 | /* Finish the creation of this type by using the enum's children. |
16483 | We must call this even when the underlying type has been provided | |
16484 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
16485 | update_enumeration_type_from_children (die, type, cu); |
16486 | ||
0626fc76 TT |
16487 | /* If this type has an underlying type that is not a stub, then we |
16488 | may use its attributes. We always use the "unsigned" attribute | |
16489 | in this situation, because ordinarily we guess whether the type | |
16490 | is unsigned -- but the guess can be wrong and the underlying type | |
16491 | can tell us the reality. However, we defer to a local size | |
16492 | attribute if one exists, because this lets the compiler override | |
16493 | the underlying type if needed. */ | |
16494 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
16495 | { | |
16496 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
16497 | if (TYPE_LENGTH (type) == 0) | |
16498 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
16499 | if (TYPE_RAW_ALIGN (type) == 0 |
16500 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
16501 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
16502 | } |
16503 | ||
3d567982 TT |
16504 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
16505 | ||
f792889a | 16506 | return set_die_type (die, type, cu); |
134d01f1 DJ |
16507 | } |
16508 | ||
16509 | /* Given a pointer to a die which begins an enumeration, process all | |
16510 | the dies that define the members of the enumeration, and create the | |
16511 | symbol for the enumeration type. | |
16512 | ||
16513 | NOTE: We reverse the order of the element list. */ | |
16514 | ||
16515 | static void | |
16516 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16517 | { | |
f792889a | 16518 | struct type *this_type; |
134d01f1 | 16519 | |
f792889a DJ |
16520 | this_type = get_die_type (die, cu); |
16521 | if (this_type == NULL) | |
16522 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16523 | |
639d11d3 | 16524 | if (die->child != NULL) |
c906108c | 16525 | { |
9dc481d3 DE |
16526 | struct die_info *child_die; |
16527 | struct symbol *sym; | |
43816ebc | 16528 | std::vector<struct field> fields; |
15d034d0 | 16529 | const char *name; |
9dc481d3 | 16530 | |
639d11d3 | 16531 | child_die = die->child; |
c906108c SS |
16532 | while (child_die && child_die->tag) |
16533 | { | |
16534 | if (child_die->tag != DW_TAG_enumerator) | |
16535 | { | |
e7c27a73 | 16536 | process_die (child_die, cu); |
c906108c SS |
16537 | } |
16538 | else | |
16539 | { | |
39cbfefa DJ |
16540 | name = dwarf2_name (child_die, cu); |
16541 | if (name) | |
c906108c | 16542 | { |
f792889a | 16543 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 16544 | |
43816ebc TT |
16545 | fields.emplace_back (); |
16546 | struct field &field = fields.back (); | |
c906108c | 16547 | |
43816ebc TT |
16548 | FIELD_NAME (field) = sym->linkage_name (); |
16549 | FIELD_TYPE (field) = NULL; | |
16550 | SET_FIELD_ENUMVAL (field, SYMBOL_VALUE (sym)); | |
16551 | FIELD_BITSIZE (field) = 0; | |
c906108c SS |
16552 | } |
16553 | } | |
16554 | ||
16555 | child_die = sibling_die (child_die); | |
16556 | } | |
16557 | ||
43816ebc | 16558 | if (!fields.empty ()) |
c906108c | 16559 | { |
43816ebc | 16560 | TYPE_NFIELDS (this_type) = fields.size (); |
f792889a | 16561 | TYPE_FIELDS (this_type) = (struct field *) |
43816ebc TT |
16562 | TYPE_ALLOC (this_type, sizeof (struct field) * fields.size ()); |
16563 | memcpy (TYPE_FIELDS (this_type), fields.data (), | |
16564 | sizeof (struct field) * fields.size ()); | |
c906108c | 16565 | } |
c906108c | 16566 | } |
134d01f1 | 16567 | |
6c83ed52 TT |
16568 | /* If we are reading an enum from a .debug_types unit, and the enum |
16569 | is a declaration, and the enum is not the signatured type in the | |
16570 | unit, then we do not want to add a symbol for it. Adding a | |
16571 | symbol would in some cases obscure the true definition of the | |
16572 | enum, giving users an incomplete type when the definition is | |
16573 | actually available. Note that we do not want to do this for all | |
16574 | enums which are just declarations, because C++0x allows forward | |
16575 | enum declarations. */ | |
3019eac3 | 16576 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16577 | && die_is_declaration (die, cu)) |
16578 | { | |
52dc124a | 16579 | struct signatured_type *sig_type; |
6c83ed52 | 16580 | |
c0f78cd4 | 16581 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16582 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16583 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16584 | return; |
16585 | } | |
16586 | ||
f792889a | 16587 | new_symbol (die, this_type, cu); |
c906108c SS |
16588 | } |
16589 | ||
16590 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
16591 | the DIE's type field. For now, this only handles one dimensional | |
16592 | arrays. */ | |
16593 | ||
f792889a | 16594 | static struct type * |
e7c27a73 | 16595 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16596 | { |
518817b3 | 16597 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 16598 | struct die_info *child_die; |
7e314c57 | 16599 | struct type *type; |
c906108c | 16600 | struct type *element_type, *range_type, *index_type; |
c906108c | 16601 | struct attribute *attr; |
15d034d0 | 16602 | const char *name; |
a405673c | 16603 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16604 | unsigned int bit_stride = 0; |
c906108c | 16605 | |
e7c27a73 | 16606 | element_type = die_type (die, cu); |
c906108c | 16607 | |
7e314c57 JK |
16608 | /* The die_type call above may have already set the type for this DIE. */ |
16609 | type = get_die_type (die, cu); | |
16610 | if (type) | |
16611 | return type; | |
16612 | ||
dc53a7ad JB |
16613 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16614 | if (attr != NULL) | |
a405673c JB |
16615 | { |
16616 | int stride_ok; | |
9a49df9d AB |
16617 | struct type *prop_type |
16618 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
a405673c JB |
16619 | |
16620 | byte_stride_prop | |
16621 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
16622 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
16623 | prop_type); | |
a405673c JB |
16624 | if (!stride_ok) |
16625 | { | |
b98664d3 | 16626 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16627 | " - DIE at %s [in module %s]"), |
16628 | sect_offset_str (die->sect_off), | |
518817b3 | 16629 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
16630 | /* Ignore this attribute. We will likely not be able to print |
16631 | arrays of this type correctly, but there is little we can do | |
16632 | to help if we cannot read the attribute's value. */ | |
16633 | byte_stride_prop = NULL; | |
16634 | } | |
16635 | } | |
dc53a7ad JB |
16636 | |
16637 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16638 | if (attr != NULL) | |
16639 | bit_stride = DW_UNSND (attr); | |
16640 | ||
c906108c SS |
16641 | /* Irix 6.2 native cc creates array types without children for |
16642 | arrays with unspecified length. */ | |
639d11d3 | 16643 | if (die->child == NULL) |
c906108c | 16644 | { |
46bf5051 | 16645 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16646 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16647 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16648 | byte_stride_prop, bit_stride); |
f792889a | 16649 | return set_die_type (die, type, cu); |
c906108c SS |
16650 | } |
16651 | ||
791afaa2 | 16652 | std::vector<struct type *> range_types; |
639d11d3 | 16653 | child_die = die->child; |
c906108c SS |
16654 | while (child_die && child_die->tag) |
16655 | { | |
16656 | if (child_die->tag == DW_TAG_subrange_type) | |
16657 | { | |
f792889a | 16658 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16659 | |
f792889a | 16660 | if (child_type != NULL) |
a02abb62 | 16661 | { |
0963b4bd MS |
16662 | /* The range type was succesfully read. Save it for the |
16663 | array type creation. */ | |
791afaa2 | 16664 | range_types.push_back (child_type); |
a02abb62 | 16665 | } |
c906108c SS |
16666 | } |
16667 | child_die = sibling_die (child_die); | |
16668 | } | |
16669 | ||
16670 | /* Dwarf2 dimensions are output from left to right, create the | |
16671 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16672 | |
c906108c | 16673 | type = element_type; |
7ca2d3a3 DL |
16674 | |
16675 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16676 | { | |
16677 | int i = 0; | |
9a619af0 | 16678 | |
791afaa2 | 16679 | while (i < range_types.size ()) |
dc53a7ad | 16680 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 16681 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
16682 | } |
16683 | else | |
16684 | { | |
791afaa2 | 16685 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16686 | while (ndim-- > 0) |
dc53a7ad | 16687 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 16688 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 16689 | } |
c906108c | 16690 | |
f5f8a009 EZ |
16691 | /* Understand Dwarf2 support for vector types (like they occur on |
16692 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16693 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16694 | custom vendor extension. The main difference between a regular | |
16695 | array and the vector variant is that vectors are passed by value | |
16696 | to functions. */ | |
e142c38c | 16697 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 16698 | if (attr != nullptr) |
ea37ba09 | 16699 | make_vector_type (type); |
f5f8a009 | 16700 | |
dbc98a8b KW |
16701 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16702 | implementation may choose to implement triple vectors using this | |
16703 | attribute. */ | |
16704 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 16705 | if (attr != nullptr) |
dbc98a8b KW |
16706 | { |
16707 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
16708 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16709 | else | |
b98664d3 | 16710 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16711 | "than the total size of elements")); |
dbc98a8b KW |
16712 | } |
16713 | ||
39cbfefa DJ |
16714 | name = dwarf2_name (die, cu); |
16715 | if (name) | |
16716 | TYPE_NAME (type) = name; | |
6e70227d | 16717 | |
2b4424c3 TT |
16718 | maybe_set_alignment (cu, die, type); |
16719 | ||
0963b4bd | 16720 | /* Install the type in the die. */ |
7e314c57 JK |
16721 | set_die_type (die, type, cu); |
16722 | ||
16723 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16724 | set_descriptive_type (type, die, cu); |
16725 | ||
7e314c57 | 16726 | return type; |
c906108c SS |
16727 | } |
16728 | ||
7ca2d3a3 | 16729 | static enum dwarf_array_dim_ordering |
6e70227d | 16730 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16731 | { |
16732 | struct attribute *attr; | |
16733 | ||
16734 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16735 | ||
435d3d88 | 16736 | if (attr != nullptr) |
aead7601 | 16737 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
7ca2d3a3 | 16738 | |
0963b4bd MS |
16739 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16740 | opposite order to the dwarf2 specification, but data is still | |
16741 | laid out as per normal fortran. | |
7ca2d3a3 | 16742 | |
0963b4bd MS |
16743 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16744 | version checking. */ | |
7ca2d3a3 | 16745 | |
905e0470 PM |
16746 | if (cu->language == language_fortran |
16747 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16748 | { |
16749 | return DW_ORD_row_major; | |
16750 | } | |
16751 | ||
6e70227d | 16752 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
16753 | { |
16754 | case array_column_major: | |
16755 | return DW_ORD_col_major; | |
16756 | case array_row_major: | |
16757 | default: | |
16758 | return DW_ORD_row_major; | |
16759 | }; | |
16760 | } | |
16761 | ||
72019c9c | 16762 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16763 | the DIE's type field. */ |
72019c9c | 16764 | |
f792889a | 16765 | static struct type * |
72019c9c GM |
16766 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16767 | { | |
7e314c57 JK |
16768 | struct type *domain_type, *set_type; |
16769 | struct attribute *attr; | |
f792889a | 16770 | |
7e314c57 JK |
16771 | domain_type = die_type (die, cu); |
16772 | ||
16773 | /* The die_type call above may have already set the type for this DIE. */ | |
16774 | set_type = get_die_type (die, cu); | |
16775 | if (set_type) | |
16776 | return set_type; | |
16777 | ||
16778 | set_type = create_set_type (NULL, domain_type); | |
16779 | ||
16780 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 16781 | if (attr != nullptr) |
d09039dd | 16782 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
7e314c57 | 16783 | |
2b4424c3 TT |
16784 | maybe_set_alignment (cu, die, set_type); |
16785 | ||
f792889a | 16786 | return set_die_type (die, set_type, cu); |
72019c9c | 16787 | } |
7ca2d3a3 | 16788 | |
0971de02 TT |
16789 | /* A helper for read_common_block that creates a locexpr baton. |
16790 | SYM is the symbol which we are marking as computed. | |
16791 | COMMON_DIE is the DIE for the common block. | |
16792 | COMMON_LOC is the location expression attribute for the common | |
16793 | block itself. | |
16794 | MEMBER_LOC is the location expression attribute for the particular | |
16795 | member of the common block that we are processing. | |
16796 | CU is the CU from which the above come. */ | |
16797 | ||
16798 | static void | |
16799 | mark_common_block_symbol_computed (struct symbol *sym, | |
16800 | struct die_info *common_die, | |
16801 | struct attribute *common_loc, | |
16802 | struct attribute *member_loc, | |
16803 | struct dwarf2_cu *cu) | |
16804 | { | |
518817b3 SM |
16805 | struct dwarf2_per_objfile *dwarf2_per_objfile |
16806 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
16807 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
16808 | struct dwarf2_locexpr_baton *baton; | |
16809 | gdb_byte *ptr; | |
16810 | unsigned int cu_off; | |
16811 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
16812 | LONGEST offset = 0; | |
16813 | ||
16814 | gdb_assert (common_loc && member_loc); | |
16815 | gdb_assert (attr_form_is_block (common_loc)); | |
16816 | gdb_assert (attr_form_is_block (member_loc) | |
16817 | || attr_form_is_constant (member_loc)); | |
16818 | ||
8d749320 | 16819 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
16820 | baton->per_cu = cu->per_cu; |
16821 | gdb_assert (baton->per_cu); | |
16822 | ||
16823 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16824 | ||
16825 | if (attr_form_is_constant (member_loc)) | |
16826 | { | |
16827 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
16828 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
16829 | } | |
16830 | else | |
16831 | baton->size += DW_BLOCK (member_loc)->size; | |
16832 | ||
224c3ddb | 16833 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16834 | baton->data = ptr; |
16835 | ||
16836 | *ptr++ = DW_OP_call4; | |
9c541725 | 16837 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16838 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16839 | ptr += 4; | |
16840 | ||
16841 | if (attr_form_is_constant (member_loc)) | |
16842 | { | |
16843 | *ptr++ = DW_OP_addr; | |
16844 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16845 | ptr += cu->header.addr_size; | |
16846 | } | |
16847 | else | |
16848 | { | |
16849 | /* We have to copy the data here, because DW_OP_call4 will only | |
16850 | use a DW_AT_location attribute. */ | |
16851 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
16852 | ptr += DW_BLOCK (member_loc)->size; | |
16853 | } | |
16854 | ||
16855 | *ptr++ = DW_OP_plus; | |
16856 | gdb_assert (ptr - baton->data == baton->size); | |
16857 | ||
0971de02 | 16858 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16859 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16860 | } |
16861 | ||
4357ac6c TT |
16862 | /* Create appropriate locally-scoped variables for all the |
16863 | DW_TAG_common_block entries. Also create a struct common_block | |
16864 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 16865 | is used to separate the common blocks name namespace from regular |
4357ac6c | 16866 | variable names. */ |
c906108c SS |
16867 | |
16868 | static void | |
e7c27a73 | 16869 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16870 | { |
0971de02 TT |
16871 | struct attribute *attr; |
16872 | ||
16873 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16874 | if (attr != nullptr) |
0971de02 TT |
16875 | { |
16876 | /* Support the .debug_loc offsets. */ | |
16877 | if (attr_form_is_block (attr)) | |
16878 | { | |
16879 | /* Ok. */ | |
16880 | } | |
16881 | else if (attr_form_is_section_offset (attr)) | |
16882 | { | |
16883 | dwarf2_complex_location_expr_complaint (); | |
16884 | attr = NULL; | |
16885 | } | |
16886 | else | |
16887 | { | |
16888 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16889 | "common block member"); | |
16890 | attr = NULL; | |
16891 | } | |
16892 | } | |
16893 | ||
639d11d3 | 16894 | if (die->child != NULL) |
c906108c | 16895 | { |
518817b3 | 16896 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16897 | struct die_info *child_die; |
16898 | size_t n_entries = 0, size; | |
16899 | struct common_block *common_block; | |
16900 | struct symbol *sym; | |
74ac6d43 | 16901 | |
4357ac6c TT |
16902 | for (child_die = die->child; |
16903 | child_die && child_die->tag; | |
16904 | child_die = sibling_die (child_die)) | |
16905 | ++n_entries; | |
16906 | ||
16907 | size = (sizeof (struct common_block) | |
16908 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16909 | common_block |
16910 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16911 | size); | |
4357ac6c TT |
16912 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16913 | common_block->n_entries = 0; | |
16914 | ||
16915 | for (child_die = die->child; | |
16916 | child_die && child_die->tag; | |
16917 | child_die = sibling_die (child_die)) | |
16918 | { | |
16919 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16920 | symbol scope. */ | |
e7c27a73 | 16921 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16922 | if (sym != NULL) |
16923 | { | |
16924 | struct attribute *member_loc; | |
16925 | ||
16926 | common_block->contents[common_block->n_entries++] = sym; | |
16927 | ||
16928 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16929 | cu); | |
16930 | if (member_loc) | |
16931 | { | |
16932 | /* GDB has handled this for a long time, but it is | |
16933 | not specified by DWARF. It seems to have been | |
16934 | emitted by gfortran at least as recently as: | |
16935 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16936 | complaint (_("Variable in common block has " |
0971de02 | 16937 | "DW_AT_data_member_location " |
9d8780f0 SM |
16938 | "- DIE at %s [in module %s]"), |
16939 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16940 | objfile_name (objfile)); |
0971de02 TT |
16941 | |
16942 | if (attr_form_is_section_offset (member_loc)) | |
16943 | dwarf2_complex_location_expr_complaint (); | |
16944 | else if (attr_form_is_constant (member_loc) | |
16945 | || attr_form_is_block (member_loc)) | |
16946 | { | |
435d3d88 | 16947 | if (attr != nullptr) |
0971de02 TT |
16948 | mark_common_block_symbol_computed (sym, die, attr, |
16949 | member_loc, cu); | |
16950 | } | |
16951 | else | |
16952 | dwarf2_complex_location_expr_complaint (); | |
16953 | } | |
16954 | } | |
c906108c | 16955 | } |
4357ac6c TT |
16956 | |
16957 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16958 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16959 | } |
16960 | } | |
16961 | ||
0114d602 | 16962 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16963 | |
0114d602 DJ |
16964 | static struct type * |
16965 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16966 | { |
518817b3 | 16967 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16968 | const char *previous_prefix, *name; |
9219021c | 16969 | int is_anonymous; |
0114d602 DJ |
16970 | struct type *type; |
16971 | ||
16972 | /* For extensions, reuse the type of the original namespace. */ | |
16973 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16974 | { | |
16975 | struct die_info *ext_die; | |
16976 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16977 | |
0114d602 DJ |
16978 | ext_die = dwarf2_extension (die, &ext_cu); |
16979 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16980 | |
16981 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16982 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16983 | return set_die_type (die, type, cu); |
16984 | } | |
9219021c | 16985 | |
e142c38c | 16986 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16987 | |
16988 | /* Now build the name of the current namespace. */ | |
16989 | ||
0114d602 DJ |
16990 | previous_prefix = determine_prefix (die, cu); |
16991 | if (previous_prefix[0] != '\0') | |
16992 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16993 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16994 | |
16995 | /* Create the type. */ | |
19f392bc | 16996 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16997 | |
60531b24 | 16998 | return set_die_type (die, type, cu); |
0114d602 DJ |
16999 | } |
17000 | ||
22cee43f | 17001 | /* Read a namespace scope. */ |
0114d602 DJ |
17002 | |
17003 | static void | |
17004 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
17005 | { | |
518817b3 | 17006 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 17007 | int is_anonymous; |
9219021c | 17008 | |
5c4e30ca DC |
17009 | /* Add a symbol associated to this if we haven't seen the namespace |
17010 | before. Also, add a using directive if it's an anonymous | |
17011 | namespace. */ | |
9219021c | 17012 | |
f2f0e013 | 17013 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
17014 | { |
17015 | struct type *type; | |
17016 | ||
0114d602 | 17017 | type = read_type_die (die, cu); |
e7c27a73 | 17018 | new_symbol (die, type, cu); |
5c4e30ca | 17019 | |
e8e80198 | 17020 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 17021 | if (is_anonymous) |
0114d602 DJ |
17022 | { |
17023 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 17024 | |
eb1e02fd | 17025 | std::vector<const char *> excludes; |
804d2729 | 17026 | add_using_directive (using_directives (cu), |
22cee43f | 17027 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 17028 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 17029 | } |
5c4e30ca | 17030 | } |
9219021c | 17031 | |
639d11d3 | 17032 | if (die->child != NULL) |
d9fa45fe | 17033 | { |
639d11d3 | 17034 | struct die_info *child_die = die->child; |
6e70227d | 17035 | |
d9fa45fe DC |
17036 | while (child_die && child_die->tag) |
17037 | { | |
e7c27a73 | 17038 | process_die (child_die, cu); |
d9fa45fe DC |
17039 | child_die = sibling_die (child_die); |
17040 | } | |
17041 | } | |
38d518c9 EZ |
17042 | } |
17043 | ||
f55ee35c JK |
17044 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
17045 | imported module. Still we need that type as local Fortran "use ... only" | |
17046 | declaration imports depend on the created type in determine_prefix. */ | |
17047 | ||
17048 | static struct type * | |
17049 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
17050 | { | |
518817b3 | 17051 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 17052 | const char *module_name; |
f55ee35c JK |
17053 | struct type *type; |
17054 | ||
17055 | module_name = dwarf2_name (die, cu); | |
19f392bc | 17056 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 17057 | |
f55ee35c JK |
17058 | return set_die_type (die, type, cu); |
17059 | } | |
17060 | ||
5d7cb8df JK |
17061 | /* Read a Fortran module. */ |
17062 | ||
17063 | static void | |
17064 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
17065 | { | |
17066 | struct die_info *child_die = die->child; | |
530e8392 KB |
17067 | struct type *type; |
17068 | ||
17069 | type = read_type_die (die, cu); | |
17070 | new_symbol (die, type, cu); | |
5d7cb8df | 17071 | |
5d7cb8df JK |
17072 | while (child_die && child_die->tag) |
17073 | { | |
17074 | process_die (child_die, cu); | |
17075 | child_die = sibling_die (child_die); | |
17076 | } | |
17077 | } | |
17078 | ||
38d518c9 EZ |
17079 | /* Return the name of the namespace represented by DIE. Set |
17080 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
17081 | namespace. */ | |
17082 | ||
17083 | static const char * | |
e142c38c | 17084 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
17085 | { |
17086 | struct die_info *current_die; | |
17087 | const char *name = NULL; | |
17088 | ||
17089 | /* Loop through the extensions until we find a name. */ | |
17090 | ||
17091 | for (current_die = die; | |
17092 | current_die != NULL; | |
f2f0e013 | 17093 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 17094 | { |
96553a0c DE |
17095 | /* We don't use dwarf2_name here so that we can detect the absence |
17096 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 17097 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 17098 | |
38d518c9 EZ |
17099 | if (name != NULL) |
17100 | break; | |
17101 | } | |
17102 | ||
17103 | /* Is it an anonymous namespace? */ | |
17104 | ||
17105 | *is_anonymous = (name == NULL); | |
17106 | if (*is_anonymous) | |
2b1dbab0 | 17107 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
17108 | |
17109 | return name; | |
d9fa45fe DC |
17110 | } |
17111 | ||
c906108c SS |
17112 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
17113 | the user defined type vector. */ | |
17114 | ||
f792889a | 17115 | static struct type * |
e7c27a73 | 17116 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17117 | { |
518817b3 SM |
17118 | struct gdbarch *gdbarch |
17119 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 17120 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 17121 | struct type *type; |
8b2dbe47 KB |
17122 | struct attribute *attr_byte_size; |
17123 | struct attribute *attr_address_class; | |
17124 | int byte_size, addr_class; | |
7e314c57 JK |
17125 | struct type *target_type; |
17126 | ||
17127 | target_type = die_type (die, cu); | |
c906108c | 17128 | |
7e314c57 JK |
17129 | /* The die_type call above may have already set the type for this DIE. */ |
17130 | type = get_die_type (die, cu); | |
17131 | if (type) | |
17132 | return type; | |
17133 | ||
17134 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 17135 | |
e142c38c | 17136 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
17137 | if (attr_byte_size) |
17138 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 17139 | else |
8b2dbe47 KB |
17140 | byte_size = cu_header->addr_size; |
17141 | ||
e142c38c | 17142 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
17143 | if (attr_address_class) |
17144 | addr_class = DW_UNSND (attr_address_class); | |
17145 | else | |
17146 | addr_class = DW_ADDR_none; | |
17147 | ||
2b4424c3 TT |
17148 | ULONGEST alignment = get_alignment (cu, die); |
17149 | ||
17150 | /* If the pointer size, alignment, or address class is different | |
17151 | than the default, create a type variant marked as such and set | |
17152 | the length accordingly. */ | |
17153 | if (TYPE_LENGTH (type) != byte_size | |
17154 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
17155 | && alignment != TYPE_RAW_ALIGN (type)) | |
17156 | || addr_class != DW_ADDR_none) | |
c906108c | 17157 | { |
5e2b427d | 17158 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
17159 | { |
17160 | int type_flags; | |
17161 | ||
849957d9 | 17162 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 17163 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
17164 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
17165 | == 0); | |
8b2dbe47 KB |
17166 | type = make_type_with_address_space (type, type_flags); |
17167 | } | |
17168 | else if (TYPE_LENGTH (type) != byte_size) | |
17169 | { | |
b98664d3 | 17170 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 17171 | } |
2b4424c3 TT |
17172 | else if (TYPE_RAW_ALIGN (type) != alignment) |
17173 | { | |
b98664d3 | 17174 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
17175 | " - DIE at %s [in module %s]"), |
17176 | sect_offset_str (die->sect_off), | |
17177 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17178 | } | |
6e70227d | 17179 | else |
9a619af0 MS |
17180 | { |
17181 | /* Should we also complain about unhandled address classes? */ | |
17182 | } | |
c906108c | 17183 | } |
8b2dbe47 KB |
17184 | |
17185 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 17186 | set_type_align (type, alignment); |
f792889a | 17187 | return set_die_type (die, type, cu); |
c906108c SS |
17188 | } |
17189 | ||
17190 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
17191 | the user defined type vector. */ | |
17192 | ||
f792889a | 17193 | static struct type * |
e7c27a73 | 17194 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
17195 | { |
17196 | struct type *type; | |
17197 | struct type *to_type; | |
17198 | struct type *domain; | |
17199 | ||
e7c27a73 DJ |
17200 | to_type = die_type (die, cu); |
17201 | domain = die_containing_type (die, cu); | |
0d5de010 | 17202 | |
7e314c57 JK |
17203 | /* The calls above may have already set the type for this DIE. */ |
17204 | type = get_die_type (die, cu); | |
17205 | if (type) | |
17206 | return type; | |
17207 | ||
0d5de010 DJ |
17208 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
17209 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
17210 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
17211 | { | |
518817b3 SM |
17212 | struct type *new_type |
17213 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
17214 | |
17215 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
17216 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
17217 | TYPE_VARARGS (to_type)); | |
17218 | type = lookup_methodptr_type (new_type); | |
17219 | } | |
0d5de010 DJ |
17220 | else |
17221 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 17222 | |
f792889a | 17223 | return set_die_type (die, type, cu); |
c906108c SS |
17224 | } |
17225 | ||
4297a3f0 | 17226 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
17227 | the user defined type vector. */ |
17228 | ||
f792889a | 17229 | static struct type * |
4297a3f0 AV |
17230 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
17231 | enum type_code refcode) | |
c906108c | 17232 | { |
e7c27a73 | 17233 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 17234 | struct type *type, *target_type; |
c906108c SS |
17235 | struct attribute *attr; |
17236 | ||
4297a3f0 AV |
17237 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
17238 | ||
7e314c57 JK |
17239 | target_type = die_type (die, cu); |
17240 | ||
17241 | /* The die_type call above may have already set the type for this DIE. */ | |
17242 | type = get_die_type (die, cu); | |
17243 | if (type) | |
17244 | return type; | |
17245 | ||
4297a3f0 | 17246 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 17247 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17248 | if (attr != nullptr) |
c906108c SS |
17249 | { |
17250 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
17251 | } | |
17252 | else | |
17253 | { | |
107d2387 | 17254 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 17255 | } |
2b4424c3 | 17256 | maybe_set_alignment (cu, die, type); |
f792889a | 17257 | return set_die_type (die, type, cu); |
c906108c SS |
17258 | } |
17259 | ||
cf363f18 MW |
17260 | /* Add the given cv-qualifiers to the element type of the array. GCC |
17261 | outputs DWARF type qualifiers that apply to an array, not the | |
17262 | element type. But GDB relies on the array element type to carry | |
17263 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
17264 | specification. */ | |
17265 | ||
17266 | static struct type * | |
17267 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
17268 | struct type *base_type, int cnst, int voltl) | |
17269 | { | |
17270 | struct type *el_type, *inner_array; | |
17271 | ||
17272 | base_type = copy_type (base_type); | |
17273 | inner_array = base_type; | |
17274 | ||
17275 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
17276 | { | |
17277 | TYPE_TARGET_TYPE (inner_array) = | |
17278 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
17279 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
17280 | } | |
17281 | ||
17282 | el_type = TYPE_TARGET_TYPE (inner_array); | |
17283 | cnst |= TYPE_CONST (el_type); | |
17284 | voltl |= TYPE_VOLATILE (el_type); | |
17285 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
17286 | ||
17287 | return set_die_type (die, base_type, cu); | |
17288 | } | |
17289 | ||
f792889a | 17290 | static struct type * |
e7c27a73 | 17291 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17292 | { |
f792889a | 17293 | struct type *base_type, *cv_type; |
c906108c | 17294 | |
e7c27a73 | 17295 | base_type = die_type (die, cu); |
7e314c57 JK |
17296 | |
17297 | /* The die_type call above may have already set the type for this DIE. */ | |
17298 | cv_type = get_die_type (die, cu); | |
17299 | if (cv_type) | |
17300 | return cv_type; | |
17301 | ||
2f608a3a KW |
17302 | /* In case the const qualifier is applied to an array type, the element type |
17303 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
17304 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 17305 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 17306 | |
f792889a DJ |
17307 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
17308 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17309 | } |
17310 | ||
f792889a | 17311 | static struct type * |
e7c27a73 | 17312 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17313 | { |
f792889a | 17314 | struct type *base_type, *cv_type; |
c906108c | 17315 | |
e7c27a73 | 17316 | base_type = die_type (die, cu); |
7e314c57 JK |
17317 | |
17318 | /* The die_type call above may have already set the type for this DIE. */ | |
17319 | cv_type = get_die_type (die, cu); | |
17320 | if (cv_type) | |
17321 | return cv_type; | |
17322 | ||
cf363f18 MW |
17323 | /* In case the volatile qualifier is applied to an array type, the |
17324 | element type is so qualified, not the array type (section 6.7.3 | |
17325 | of C99). */ | |
17326 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
17327 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
17328 | ||
f792889a DJ |
17329 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17330 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17331 | } |
17332 | ||
06d66ee9 TT |
17333 | /* Handle DW_TAG_restrict_type. */ |
17334 | ||
17335 | static struct type * | |
17336 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17337 | { | |
17338 | struct type *base_type, *cv_type; | |
17339 | ||
17340 | base_type = die_type (die, cu); | |
17341 | ||
17342 | /* The die_type call above may have already set the type for this DIE. */ | |
17343 | cv_type = get_die_type (die, cu); | |
17344 | if (cv_type) | |
17345 | return cv_type; | |
17346 | ||
17347 | cv_type = make_restrict_type (base_type); | |
17348 | return set_die_type (die, cv_type, cu); | |
17349 | } | |
17350 | ||
a2c2acaf MW |
17351 | /* Handle DW_TAG_atomic_type. */ |
17352 | ||
17353 | static struct type * | |
17354 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17355 | { | |
17356 | struct type *base_type, *cv_type; | |
17357 | ||
17358 | base_type = die_type (die, cu); | |
17359 | ||
17360 | /* The die_type call above may have already set the type for this DIE. */ | |
17361 | cv_type = get_die_type (die, cu); | |
17362 | if (cv_type) | |
17363 | return cv_type; | |
17364 | ||
17365 | cv_type = make_atomic_type (base_type); | |
17366 | return set_die_type (die, cv_type, cu); | |
17367 | } | |
17368 | ||
c906108c SS |
17369 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17370 | the user defined type vector. It isn't really a user defined type, | |
17371 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17372 | attribute to reference it. */ | |
17373 | ||
f792889a | 17374 | static struct type * |
e7c27a73 | 17375 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17376 | { |
518817b3 | 17377 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 17378 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
17379 | struct type *type, *range_type, *index_type, *char_type; |
17380 | struct attribute *attr; | |
216a7e6b AB |
17381 | struct dynamic_prop prop; |
17382 | bool length_is_constant = true; | |
17383 | LONGEST length; | |
17384 | ||
17385 | /* There are a couple of places where bit sizes might be made use of | |
17386 | when parsing a DW_TAG_string_type, however, no producer that we know | |
17387 | of make use of these. Handling bit sizes that are a multiple of the | |
17388 | byte size is easy enough, but what about other bit sizes? Lets deal | |
17389 | with that problem when we have to. Warn about these attributes being | |
17390 | unsupported, then parse the type and ignore them like we always | |
17391 | have. */ | |
17392 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
17393 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
17394 | { | |
17395 | static bool warning_printed = false; | |
17396 | if (!warning_printed) | |
17397 | { | |
17398 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
17399 | "currently supported on DW_TAG_string_type.")); | |
17400 | warning_printed = true; | |
17401 | } | |
17402 | } | |
c906108c | 17403 | |
e142c38c | 17404 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
216a7e6b AB |
17405 | if (attr != nullptr && !attr_form_is_constant (attr)) |
17406 | { | |
17407 | /* The string length describes the location at which the length of | |
17408 | the string can be found. The size of the length field can be | |
17409 | specified with one of the attributes below. */ | |
17410 | struct type *prop_type; | |
17411 | struct attribute *len | |
17412 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
17413 | if (len == nullptr) | |
17414 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
17415 | if (len != nullptr && attr_form_is_constant (len)) | |
17416 | { | |
17417 | /* Pass 0 as the default as we know this attribute is constant | |
17418 | and the default value will not be returned. */ | |
17419 | LONGEST sz = dwarf2_get_attr_constant_value (len, 0); | |
17420 | prop_type = dwarf2_per_cu_int_type (cu->per_cu, sz, true); | |
17421 | } | |
17422 | else | |
17423 | { | |
17424 | /* If the size is not specified then we assume it is the size of | |
17425 | an address on this target. */ | |
17426 | prop_type = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, true); | |
17427 | } | |
17428 | ||
17429 | /* Convert the attribute into a dynamic property. */ | |
17430 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
17431 | length = 1; | |
17432 | else | |
17433 | length_is_constant = false; | |
17434 | } | |
17435 | else if (attr != nullptr) | |
17436 | { | |
17437 | /* This DW_AT_string_length just contains the length with no | |
17438 | indirection. There's no need to create a dynamic property in this | |
17439 | case. Pass 0 for the default value as we know it will not be | |
17440 | returned in this case. */ | |
17441 | length = dwarf2_get_attr_constant_value (attr, 0); | |
17442 | } | |
17443 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 17444 | { |
216a7e6b AB |
17445 | /* We don't currently support non-constant byte sizes for strings. */ |
17446 | length = dwarf2_get_attr_constant_value (attr, 1); | |
c906108c SS |
17447 | } |
17448 | else | |
17449 | { | |
216a7e6b AB |
17450 | /* Use 1 as a fallback length if we have nothing else. */ |
17451 | length = 1; | |
c906108c | 17452 | } |
6ccb9162 | 17453 | |
46bf5051 | 17454 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
17455 | if (length_is_constant) |
17456 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
17457 | else | |
17458 | { | |
17459 | struct dynamic_prop low_bound; | |
17460 | ||
17461 | low_bound.kind = PROP_CONST; | |
17462 | low_bound.data.const_val = 1; | |
17463 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); | |
17464 | } | |
3b7538c0 UW |
17465 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17466 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17467 | |
f792889a | 17468 | return set_die_type (die, type, cu); |
c906108c SS |
17469 | } |
17470 | ||
4d804846 JB |
17471 | /* Assuming that DIE corresponds to a function, returns nonzero |
17472 | if the function is prototyped. */ | |
17473 | ||
17474 | static int | |
17475 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17476 | { | |
17477 | struct attribute *attr; | |
17478 | ||
17479 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
17480 | if (attr && (DW_UNSND (attr) != 0)) | |
17481 | return 1; | |
17482 | ||
17483 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 17484 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
17485 | languages that allow unprototyped functions (Eg: Objective C). |
17486 | For all other languages, assume that functions are always | |
17487 | prototyped. */ | |
17488 | if (cu->language != language_c | |
17489 | && cu->language != language_objc | |
17490 | && cu->language != language_opencl) | |
17491 | return 1; | |
17492 | ||
17493 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17494 | prototyped and unprototyped functions; default to prototyped, | |
17495 | since that is more common in modern code (and RealView warns | |
17496 | about unprototyped functions). */ | |
17497 | if (producer_is_realview (cu->producer)) | |
17498 | return 1; | |
17499 | ||
17500 | return 0; | |
17501 | } | |
17502 | ||
c906108c SS |
17503 | /* Handle DIES due to C code like: |
17504 | ||
17505 | struct foo | |
c5aa993b JM |
17506 | { |
17507 | int (*funcp)(int a, long l); | |
17508 | int b; | |
17509 | }; | |
c906108c | 17510 | |
0963b4bd | 17511 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17512 | |
f792889a | 17513 | static struct type * |
e7c27a73 | 17514 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17515 | { |
518817b3 | 17516 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
17517 | struct type *type; /* Type that this function returns. */ |
17518 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17519 | struct attribute *attr; |
17520 | ||
e7c27a73 | 17521 | type = die_type (die, cu); |
7e314c57 JK |
17522 | |
17523 | /* The die_type call above may have already set the type for this DIE. */ | |
17524 | ftype = get_die_type (die, cu); | |
17525 | if (ftype) | |
17526 | return ftype; | |
17527 | ||
0c8b41f1 | 17528 | ftype = lookup_function_type (type); |
c906108c | 17529 | |
4d804846 | 17530 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 17531 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 17532 | |
c055b101 CV |
17533 | /* Store the calling convention in the type if it's available in |
17534 | the subroutine die. Otherwise set the calling convention to | |
17535 | the default value DW_CC_normal. */ | |
17536 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf TBA |
17537 | if (attr != nullptr |
17538 | && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) | |
17539 | TYPE_CALLING_CONVENTION (ftype) | |
17540 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
54fcddd0 UW |
17541 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
17542 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17543 | else | |
17544 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17545 | |
743649fd MW |
17546 | /* Record whether the function returns normally to its caller or not |
17547 | if the DWARF producer set that information. */ | |
17548 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
17549 | if (attr && (DW_UNSND (attr) != 0)) | |
17550 | TYPE_NO_RETURN (ftype) = 1; | |
17551 | ||
76c10ea2 GM |
17552 | /* We need to add the subroutine type to the die immediately so |
17553 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17554 | declared as the same subroutine type. */ |
76c10ea2 | 17555 | set_die_type (die, ftype, cu); |
6e70227d | 17556 | |
639d11d3 | 17557 | if (die->child != NULL) |
c906108c | 17558 | { |
bb5ed363 | 17559 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17560 | struct die_info *child_die; |
8072405b | 17561 | int nparams, iparams; |
c906108c SS |
17562 | |
17563 | /* Count the number of parameters. | |
17564 | FIXME: GDB currently ignores vararg functions, but knows about | |
17565 | vararg member functions. */ | |
8072405b | 17566 | nparams = 0; |
639d11d3 | 17567 | child_die = die->child; |
c906108c SS |
17568 | while (child_die && child_die->tag) |
17569 | { | |
17570 | if (child_die->tag == DW_TAG_formal_parameter) | |
17571 | nparams++; | |
17572 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 17573 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
17574 | child_die = sibling_die (child_die); |
17575 | } | |
17576 | ||
17577 | /* Allocate storage for parameters and fill them in. */ | |
17578 | TYPE_NFIELDS (ftype) = nparams; | |
17579 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 17580 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 17581 | |
8072405b JK |
17582 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17583 | even if we error out during the parameters reading below. */ | |
17584 | for (iparams = 0; iparams < nparams; iparams++) | |
17585 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
17586 | ||
17587 | iparams = 0; | |
639d11d3 | 17588 | child_die = die->child; |
c906108c SS |
17589 | while (child_die && child_die->tag) |
17590 | { | |
17591 | if (child_die->tag == DW_TAG_formal_parameter) | |
17592 | { | |
3ce3b1ba PA |
17593 | struct type *arg_type; |
17594 | ||
17595 | /* DWARF version 2 has no clean way to discern C++ | |
17596 | static and non-static member functions. G++ helps | |
17597 | GDB by marking the first parameter for non-static | |
17598 | member functions (which is the this pointer) as | |
17599 | artificial. We pass this information to | |
17600 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17601 | ||
17602 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17603 | 4.5 does not yet generate. */ | |
e142c38c | 17604 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 17605 | if (attr != nullptr) |
c906108c SS |
17606 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
17607 | else | |
9c37b5ae | 17608 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17609 | arg_type = die_type (child_die, cu); |
17610 | ||
17611 | /* RealView does not mark THIS as const, which the testsuite | |
17612 | expects. GCC marks THIS as const in method definitions, | |
17613 | but not in the class specifications (GCC PR 43053). */ | |
17614 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17615 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17616 | { | |
17617 | int is_this = 0; | |
17618 | struct dwarf2_cu *arg_cu = cu; | |
17619 | const char *name = dwarf2_name (child_die, cu); | |
17620 | ||
17621 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 17622 | if (attr != nullptr) |
3ce3b1ba PA |
17623 | { |
17624 | /* If the compiler emits this, use it. */ | |
17625 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17626 | is_this = 1; | |
17627 | } | |
17628 | else if (name && strcmp (name, "this") == 0) | |
17629 | /* Function definitions will have the argument names. */ | |
17630 | is_this = 1; | |
17631 | else if (name == NULL && iparams == 0) | |
17632 | /* Declarations may not have the names, so like | |
17633 | elsewhere in GDB, assume an artificial first | |
17634 | argument is "this". */ | |
17635 | is_this = 1; | |
17636 | ||
17637 | if (is_this) | |
17638 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17639 | arg_type, 0); | |
17640 | } | |
17641 | ||
17642 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
17643 | iparams++; |
17644 | } | |
17645 | child_die = sibling_die (child_die); | |
17646 | } | |
17647 | } | |
17648 | ||
76c10ea2 | 17649 | return ftype; |
c906108c SS |
17650 | } |
17651 | ||
f792889a | 17652 | static struct type * |
e7c27a73 | 17653 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17654 | { |
518817b3 | 17655 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 17656 | const char *name = NULL; |
3c8e0968 | 17657 | struct type *this_type, *target_type; |
c906108c | 17658 | |
94af9270 | 17659 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
17660 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
17661 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 17662 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17663 | target_type = die_type (die, cu); |
17664 | if (target_type != this_type) | |
17665 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17666 | else | |
17667 | { | |
17668 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17669 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17670 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17671 | "- DIE at %s [in module %s]"), |
17672 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17673 | TYPE_TARGET_TYPE (this_type) = NULL; |
17674 | } | |
f792889a | 17675 | return this_type; |
c906108c SS |
17676 | } |
17677 | ||
9b790ce7 UW |
17678 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17679 | (which may be different from NAME) to the architecture back-end to allow | |
17680 | it to guess the correct format if necessary. */ | |
17681 | ||
17682 | static struct type * | |
17683 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 17684 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 UW |
17685 | { |
17686 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
17687 | const struct floatformat **format; | |
17688 | struct type *type; | |
17689 | ||
17690 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17691 | if (format) | |
103a685e | 17692 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 17693 | else |
77b7c781 | 17694 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17695 | |
17696 | return type; | |
17697 | } | |
17698 | ||
eb77c9df AB |
17699 | /* Allocate an integer type of size BITS and name NAME. */ |
17700 | ||
17701 | static struct type * | |
17702 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
17703 | int bits, int unsigned_p, const char *name) | |
17704 | { | |
17705 | struct type *type; | |
17706 | ||
17707 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
17708 | instead of using DW_TAG_unspecified_type. This has been seen on | |
17709 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
17710 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
17711 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
17712 | type = objfile_type (objfile)->builtin_void; |
17713 | else | |
17714 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
17715 | ||
17716 | return type; | |
17717 | } | |
17718 | ||
8bdc1658 AB |
17719 | /* Initialise and return a floating point type of size BITS suitable for |
17720 | use as a component of a complex number. The NAME_HINT is passed through | |
17721 | when initialising the floating point type and is the name of the complex | |
17722 | type. | |
17723 | ||
17724 | As DWARF doesn't currently provide an explicit name for the components | |
17725 | of a complex number, but it can be helpful to have these components | |
17726 | named, we try to select a suitable name based on the size of the | |
17727 | component. */ | |
17728 | static struct type * | |
17729 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
17730 | struct objfile *objfile, | |
103a685e TT |
17731 | int bits, const char *name_hint, |
17732 | enum bfd_endian byte_order) | |
8bdc1658 AB |
17733 | { |
17734 | gdbarch *gdbarch = get_objfile_arch (objfile); | |
17735 | struct type *tt = nullptr; | |
17736 | ||
35add35e AB |
17737 | /* Try to find a suitable floating point builtin type of size BITS. |
17738 | We're going to use the name of this type as the name for the complex | |
17739 | target type that we are about to create. */ | |
1db455a7 | 17740 | switch (cu->language) |
8bdc1658 | 17741 | { |
1db455a7 AB |
17742 | case language_fortran: |
17743 | switch (bits) | |
17744 | { | |
17745 | case 32: | |
17746 | tt = builtin_f_type (gdbarch)->builtin_real; | |
17747 | break; | |
17748 | case 64: | |
17749 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
17750 | break; | |
17751 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17752 | case 128: | |
17753 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
17754 | break; | |
17755 | } | |
8bdc1658 | 17756 | break; |
1db455a7 AB |
17757 | default: |
17758 | switch (bits) | |
17759 | { | |
17760 | case 32: | |
17761 | tt = builtin_type (gdbarch)->builtin_float; | |
17762 | break; | |
17763 | case 64: | |
17764 | tt = builtin_type (gdbarch)->builtin_double; | |
17765 | break; | |
17766 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17767 | case 128: | |
17768 | tt = builtin_type (gdbarch)->builtin_long_double; | |
17769 | break; | |
17770 | } | |
8bdc1658 AB |
17771 | break; |
17772 | } | |
17773 | ||
35add35e AB |
17774 | /* If the type we found doesn't match the size we were looking for, then |
17775 | pretend we didn't find a type at all, the complex target type we | |
17776 | create will then be nameless. */ | |
a12e5744 | 17777 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
17778 | tt = nullptr; |
17779 | ||
8bdc1658 | 17780 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
103a685e | 17781 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
17782 | } |
17783 | ||
c906108c SS |
17784 | /* Find a representation of a given base type and install |
17785 | it in the TYPE field of the die. */ | |
17786 | ||
f792889a | 17787 | static struct type * |
e7c27a73 | 17788 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17789 | { |
518817b3 | 17790 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
17791 | struct type *type; |
17792 | struct attribute *attr; | |
19f392bc | 17793 | int encoding = 0, bits = 0; |
15d034d0 | 17794 | const char *name; |
34877895 | 17795 | gdbarch *arch; |
c906108c | 17796 | |
e142c38c | 17797 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
435d3d88 | 17798 | if (attr != nullptr) |
34877895 | 17799 | encoding = DW_UNSND (attr); |
e142c38c | 17800 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17801 | if (attr != nullptr) |
34877895 | 17802 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
39cbfefa | 17803 | name = dwarf2_name (die, cu); |
6ccb9162 | 17804 | if (!name) |
34877895 | 17805 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e TT |
17806 | |
17807 | arch = get_objfile_arch (objfile); | |
17808 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
17809 | ||
34877895 PJ |
17810 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
17811 | if (attr) | |
103a685e TT |
17812 | { |
17813 | int endianity = DW_UNSND (attr); | |
17814 | ||
17815 | switch (endianity) | |
17816 | { | |
17817 | case DW_END_big: | |
17818 | byte_order = BFD_ENDIAN_BIG; | |
17819 | break; | |
17820 | case DW_END_little: | |
17821 | byte_order = BFD_ENDIAN_LITTLE; | |
17822 | break; | |
17823 | default: | |
17824 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
17825 | break; | |
17826 | } | |
17827 | } | |
6ccb9162 UW |
17828 | |
17829 | switch (encoding) | |
c906108c | 17830 | { |
6ccb9162 UW |
17831 | case DW_ATE_address: |
17832 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 17833 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 17834 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
17835 | break; |
17836 | case DW_ATE_boolean: | |
19f392bc | 17837 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
17838 | break; |
17839 | case DW_ATE_complex_float: | |
103a685e TT |
17840 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
17841 | byte_order); | |
19f392bc | 17842 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
17843 | break; |
17844 | case DW_ATE_decimal_float: | |
19f392bc | 17845 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
17846 | break; |
17847 | case DW_ATE_float: | |
103a685e | 17848 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
17849 | break; |
17850 | case DW_ATE_signed: | |
eb77c9df | 17851 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17852 | break; |
17853 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17854 | if (cu->language == language_fortran |
17855 | && name | |
61012eef | 17856 | && startswith (name, "character(")) |
19f392bc UW |
17857 | type = init_character_type (objfile, bits, 1, name); |
17858 | else | |
eb77c9df | 17859 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
17860 | break; |
17861 | case DW_ATE_signed_char: | |
6e70227d | 17862 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17863 | || cu->language == language_pascal |
17864 | || cu->language == language_fortran) | |
19f392bc UW |
17865 | type = init_character_type (objfile, bits, 0, name); |
17866 | else | |
eb77c9df | 17867 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17868 | break; |
17869 | case DW_ATE_unsigned_char: | |
868a0084 | 17870 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17871 | || cu->language == language_pascal |
c44af4eb TT |
17872 | || cu->language == language_fortran |
17873 | || cu->language == language_rust) | |
19f392bc UW |
17874 | type = init_character_type (objfile, bits, 1, name); |
17875 | else | |
eb77c9df | 17876 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17877 | break; |
75079b2b | 17878 | case DW_ATE_UTF: |
53e710ac | 17879 | { |
53e710ac PA |
17880 | if (bits == 16) |
17881 | type = builtin_type (arch)->builtin_char16; | |
17882 | else if (bits == 32) | |
17883 | type = builtin_type (arch)->builtin_char32; | |
17884 | else | |
17885 | { | |
b98664d3 | 17886 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17887 | bits); |
eb77c9df | 17888 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17889 | } |
17890 | return set_die_type (die, type, cu); | |
17891 | } | |
75079b2b TT |
17892 | break; |
17893 | ||
6ccb9162 | 17894 | default: |
b98664d3 | 17895 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17896 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17897 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17898 | break; |
c906108c | 17899 | } |
6ccb9162 | 17900 | |
0114d602 | 17901 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17902 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17903 | |
2b4424c3 TT |
17904 | maybe_set_alignment (cu, die, type); |
17905 | ||
103a685e | 17906 | TYPE_ENDIANITY_NOT_DEFAULT (type) = gdbarch_byte_order (arch) != byte_order; |
34877895 | 17907 | |
f792889a | 17908 | return set_die_type (die, type, cu); |
c906108c SS |
17909 | } |
17910 | ||
80180f79 SA |
17911 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17912 | resulting value of the attribute into struct bound_prop. | |
17913 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17914 | ||
17915 | static int | |
17916 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17917 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17918 | struct type *default_type) | |
80180f79 SA |
17919 | { |
17920 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17921 | struct obstack *obstack |
17922 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17923 | |
9a49df9d AB |
17924 | gdb_assert (default_type != NULL); |
17925 | ||
80180f79 SA |
17926 | if (attr == NULL || prop == NULL) |
17927 | return 0; | |
17928 | ||
17929 | if (attr_form_is_block (attr)) | |
17930 | { | |
8d749320 | 17931 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17932 | baton->property_type = default_type; |
80180f79 SA |
17933 | baton->locexpr.per_cu = cu->per_cu; |
17934 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17935 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
216a7e6b AB |
17936 | switch (attr->name) |
17937 | { | |
17938 | case DW_AT_string_length: | |
17939 | baton->locexpr.is_reference = true; | |
17940 | break; | |
17941 | default: | |
17942 | baton->locexpr.is_reference = false; | |
17943 | break; | |
17944 | } | |
80180f79 SA |
17945 | prop->data.baton = baton; |
17946 | prop->kind = PROP_LOCEXPR; | |
17947 | gdb_assert (prop->data.baton != NULL); | |
17948 | } | |
17949 | else if (attr_form_is_ref (attr)) | |
17950 | { | |
17951 | struct dwarf2_cu *target_cu = cu; | |
17952 | struct die_info *target_die; | |
17953 | struct attribute *target_attr; | |
17954 | ||
17955 | target_die = follow_die_ref (die, attr, &target_cu); | |
17956 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17957 | if (target_attr == NULL) |
17958 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17959 | target_cu); | |
80180f79 SA |
17960 | if (target_attr == NULL) |
17961 | return 0; | |
17962 | ||
df25ebbd | 17963 | switch (target_attr->name) |
80180f79 | 17964 | { |
df25ebbd JB |
17965 | case DW_AT_location: |
17966 | if (attr_form_is_section_offset (target_attr)) | |
17967 | { | |
8d749320 | 17968 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17969 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17970 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17971 | prop->data.baton = baton; | |
17972 | prop->kind = PROP_LOCLIST; | |
17973 | gdb_assert (prop->data.baton != NULL); | |
17974 | } | |
17975 | else if (attr_form_is_block (target_attr)) | |
17976 | { | |
8d749320 | 17977 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17978 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17979 | baton->locexpr.per_cu = cu->per_cu; |
17980 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17981 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17982 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17983 | prop->data.baton = baton; |
17984 | prop->kind = PROP_LOCEXPR; | |
17985 | gdb_assert (prop->data.baton != NULL); | |
17986 | } | |
17987 | else | |
17988 | { | |
17989 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17990 | "dynamic property"); | |
17991 | return 0; | |
17992 | } | |
17993 | break; | |
17994 | case DW_AT_data_member_location: | |
17995 | { | |
17996 | LONGEST offset; | |
17997 | ||
17998 | if (!handle_data_member_location (target_die, target_cu, | |
17999 | &offset)) | |
18000 | return 0; | |
18001 | ||
8d749320 | 18002 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18003 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 18004 | target_cu); |
df25ebbd JB |
18005 | baton->offset_info.offset = offset; |
18006 | baton->offset_info.type = die_type (target_die, target_cu); | |
18007 | prop->data.baton = baton; | |
18008 | prop->kind = PROP_ADDR_OFFSET; | |
18009 | break; | |
18010 | } | |
80180f79 SA |
18011 | } |
18012 | } | |
18013 | else if (attr_form_is_constant (attr)) | |
18014 | { | |
18015 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
18016 | prop->kind = PROP_CONST; | |
18017 | } | |
18018 | else | |
18019 | { | |
18020 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
18021 | dwarf2_name (die, cu)); | |
18022 | return 0; | |
18023 | } | |
18024 | ||
18025 | return 1; | |
18026 | } | |
18027 | ||
11a8b164 AB |
18028 | /* Find an integer type SIZE_IN_BYTES bytes in size and return it. |
18029 | UNSIGNED_P controls if the integer is unsigned or not. */ | |
9a49df9d AB |
18030 | |
18031 | static struct type * | |
11a8b164 AB |
18032 | dwarf2_per_cu_int_type (struct dwarf2_per_cu_data *per_cu, |
18033 | int size_in_bytes, bool unsigned_p) | |
9a49df9d AB |
18034 | { |
18035 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; | |
9a49df9d AB |
18036 | struct type *int_type; |
18037 | ||
18038 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
18039 | #define TRY_TYPE(F) \ |
18040 | int_type = (unsigned_p \ | |
18041 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
18042 | : objfile_type (objfile)->builtin_ ## F); \ | |
18043 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
18044 | return int_type |
18045 | ||
18046 | TRY_TYPE (char); | |
18047 | TRY_TYPE (short); | |
18048 | TRY_TYPE (int); | |
18049 | TRY_TYPE (long); | |
18050 | TRY_TYPE (long_long); | |
18051 | ||
18052 | #undef TRY_TYPE | |
18053 | ||
18054 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
18055 | } | |
18056 | ||
11a8b164 AB |
18057 | /* Find an integer type the same size as the address size given in the |
18058 | compilation unit header for PER_CU. UNSIGNED_P controls if the integer | |
18059 | is unsigned or not. */ | |
18060 | ||
18061 | static struct type * | |
18062 | dwarf2_per_cu_addr_sized_int_type (struct dwarf2_per_cu_data *per_cu, | |
18063 | bool unsigned_p) | |
18064 | { | |
18065 | int addr_size = dwarf2_per_cu_addr_size (per_cu); | |
18066 | return dwarf2_per_cu_int_type (per_cu, addr_size, unsigned_p); | |
18067 | } | |
18068 | ||
b86352cf AB |
18069 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
18070 | present (which is valid) then compute the default type based on the | |
18071 | compilation units address size. */ | |
18072 | ||
18073 | static struct type * | |
18074 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
18075 | { | |
18076 | struct type *index_type = die_type (die, cu); | |
18077 | ||
18078 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
18079 | without specifying a base type. | |
18080 | In that case, the base type must be set to the type of | |
18081 | the lower bound, upper bound or count, in that order, if any of these | |
18082 | three attributes references an object that has a type. | |
18083 | If no base type is found, the Dwarf-2 specifications say that | |
18084 | a signed integer type of size equal to the size of an address should | |
18085 | be used. | |
18086 | For the following C code: `extern char gdb_int [];' | |
18087 | GCC produces an empty range DIE. | |
18088 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
18089 | high bound or count are not yet handled by this code. */ | |
18090 | if (TYPE_CODE (index_type) == TYPE_CODE_VOID) | |
9a49df9d | 18091 | index_type = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); |
b86352cf AB |
18092 | |
18093 | return index_type; | |
18094 | } | |
18095 | ||
a02abb62 JB |
18096 | /* Read the given DW_AT_subrange DIE. */ |
18097 | ||
f792889a | 18098 | static struct type * |
a02abb62 JB |
18099 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
18100 | { | |
4c9ad8c2 | 18101 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
18102 | struct type *range_type; |
18103 | struct attribute *attr; | |
729efb13 | 18104 | struct dynamic_prop low, high; |
4fae6e18 | 18105 | int low_default_is_valid; |
c451ebe5 | 18106 | int high_bound_is_count = 0; |
15d034d0 | 18107 | const char *name; |
d359392f | 18108 | ULONGEST negative_mask; |
e77813c8 | 18109 | |
b86352cf AB |
18110 | orig_base_type = read_subrange_index_type (die, cu); |
18111 | ||
4c9ad8c2 TT |
18112 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
18113 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
18114 | creating the range type, but we use the result of check_typedef | |
18115 | when examining properties of the type. */ | |
18116 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 18117 | |
7e314c57 JK |
18118 | /* The die_type call above may have already set the type for this DIE. */ |
18119 | range_type = get_die_type (die, cu); | |
18120 | if (range_type) | |
18121 | return range_type; | |
18122 | ||
729efb13 SA |
18123 | low.kind = PROP_CONST; |
18124 | high.kind = PROP_CONST; | |
18125 | high.data.const_val = 0; | |
18126 | ||
4fae6e18 JK |
18127 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
18128 | omitting DW_AT_lower_bound. */ | |
18129 | switch (cu->language) | |
6e70227d | 18130 | { |
4fae6e18 JK |
18131 | case language_c: |
18132 | case language_cplus: | |
729efb13 | 18133 | low.data.const_val = 0; |
4fae6e18 JK |
18134 | low_default_is_valid = 1; |
18135 | break; | |
18136 | case language_fortran: | |
729efb13 | 18137 | low.data.const_val = 1; |
4fae6e18 JK |
18138 | low_default_is_valid = 1; |
18139 | break; | |
18140 | case language_d: | |
4fae6e18 | 18141 | case language_objc: |
c44af4eb | 18142 | case language_rust: |
729efb13 | 18143 | low.data.const_val = 0; |
4fae6e18 JK |
18144 | low_default_is_valid = (cu->header.version >= 4); |
18145 | break; | |
18146 | case language_ada: | |
18147 | case language_m2: | |
18148 | case language_pascal: | |
729efb13 | 18149 | low.data.const_val = 1; |
4fae6e18 JK |
18150 | low_default_is_valid = (cu->header.version >= 4); |
18151 | break; | |
18152 | default: | |
729efb13 | 18153 | low.data.const_val = 0; |
4fae6e18 JK |
18154 | low_default_is_valid = 0; |
18155 | break; | |
a02abb62 JB |
18156 | } |
18157 | ||
e142c38c | 18158 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 18159 | if (attr != nullptr) |
9a49df9d | 18160 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 18161 | else if (!low_default_is_valid) |
b98664d3 | 18162 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
18163 | "- DIE at %s [in module %s]"), |
18164 | sect_offset_str (die->sect_off), | |
518817b3 | 18165 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 18166 | |
506f5c41 TV |
18167 | struct attribute *attr_ub, *attr_count; |
18168 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 18169 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 18170 | { |
506f5c41 | 18171 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 18172 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 18173 | { |
c451ebe5 SA |
18174 | /* If bounds are constant do the final calculation here. */ |
18175 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
18176 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
18177 | else | |
18178 | high_bound_is_count = 1; | |
c2ff108b | 18179 | } |
506f5c41 TV |
18180 | else |
18181 | { | |
18182 | if (attr_ub != NULL) | |
18183 | complaint (_("Unresolved DW_AT_upper_bound " | |
18184 | "- DIE at %s [in module %s]"), | |
18185 | sect_offset_str (die->sect_off), | |
18186 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
18187 | if (attr_count != NULL) | |
18188 | complaint (_("Unresolved DW_AT_count " | |
18189 | "- DIE at %s [in module %s]"), | |
18190 | sect_offset_str (die->sect_off), | |
18191 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
18192 | } | |
e77813c8 | 18193 | } |
a02abb62 | 18194 | |
4e962e74 TT |
18195 | LONGEST bias = 0; |
18196 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
18197 | if (bias_attr != nullptr && attr_form_is_constant (bias_attr)) | |
18198 | bias = dwarf2_get_attr_constant_value (bias_attr, 0); | |
18199 | ||
dbb9c2b1 JB |
18200 | /* Normally, the DWARF producers are expected to use a signed |
18201 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
18202 | But this is unfortunately not always the case, as witnessed | |
18203 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
18204 | is used instead. To work around that ambiguity, we treat | |
18205 | the bounds as signed, and thus sign-extend their values, when | |
18206 | the base type is signed. */ | |
6e70227d | 18207 | negative_mask = |
d359392f | 18208 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
18209 | if (low.kind == PROP_CONST |
18210 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
18211 | low.data.const_val |= negative_mask; | |
18212 | if (high.kind == PROP_CONST | |
18213 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
18214 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 18215 | |
5bbd8269 AB |
18216 | /* Check for bit and byte strides. */ |
18217 | struct dynamic_prop byte_stride_prop; | |
18218 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
18219 | if (attr_byte_stride != nullptr) | |
18220 | { | |
18221 | struct type *prop_type | |
18222 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
18223 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, | |
18224 | prop_type); | |
18225 | } | |
18226 | ||
18227 | struct dynamic_prop bit_stride_prop; | |
18228 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
18229 | if (attr_bit_stride != nullptr) | |
18230 | { | |
18231 | /* It only makes sense to have either a bit or byte stride. */ | |
18232 | if (attr_byte_stride != nullptr) | |
18233 | { | |
18234 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
18235 | "- DIE at %s [in module %s]"), | |
18236 | sect_offset_str (die->sect_off), | |
18237 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
18238 | attr_bit_stride = nullptr; | |
18239 | } | |
18240 | else | |
18241 | { | |
18242 | struct type *prop_type | |
18243 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
18244 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, | |
18245 | prop_type); | |
18246 | } | |
18247 | } | |
18248 | ||
18249 | if (attr_byte_stride != nullptr | |
18250 | || attr_bit_stride != nullptr) | |
18251 | { | |
18252 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
18253 | struct dynamic_prop *stride | |
18254 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
18255 | ||
18256 | range_type | |
18257 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
18258 | &high, bias, stride, byte_stride_p); | |
18259 | } | |
18260 | else | |
18261 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 18262 | |
c451ebe5 SA |
18263 | if (high_bound_is_count) |
18264 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
18265 | ||
c2ff108b JK |
18266 | /* Ada expects an empty array on no boundary attributes. */ |
18267 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 18268 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 18269 | |
39cbfefa DJ |
18270 | name = dwarf2_name (die, cu); |
18271 | if (name) | |
18272 | TYPE_NAME (range_type) = name; | |
6e70227d | 18273 | |
e142c38c | 18274 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 18275 | if (attr != nullptr) |
a02abb62 JB |
18276 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
18277 | ||
2b4424c3 TT |
18278 | maybe_set_alignment (cu, die, range_type); |
18279 | ||
7e314c57 JK |
18280 | set_die_type (die, range_type, cu); |
18281 | ||
18282 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
18283 | set_descriptive_type (range_type, die, cu); |
18284 | ||
7e314c57 | 18285 | return range_type; |
a02abb62 | 18286 | } |
6e70227d | 18287 | |
f792889a | 18288 | static struct type * |
81a17f79 JB |
18289 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
18290 | { | |
18291 | struct type *type; | |
81a17f79 | 18292 | |
518817b3 SM |
18293 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
18294 | NULL); | |
0114d602 | 18295 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 18296 | |
74a2f8ff | 18297 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 18298 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
18299 | such a type, we treat it as a stub, and try to resolve it later on, |
18300 | when needed. */ | |
18301 | if (cu->language == language_ada) | |
18302 | TYPE_STUB (type) = 1; | |
18303 | ||
f792889a | 18304 | return set_die_type (die, type, cu); |
81a17f79 | 18305 | } |
a02abb62 | 18306 | |
639d11d3 DC |
18307 | /* Read a single die and all its descendents. Set the die's sibling |
18308 | field to NULL; set other fields in the die correctly, and set all | |
18309 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
18310 | location of the info_ptr after reading all of those dies. PARENT | |
18311 | is the parent of the die in question. */ | |
18312 | ||
18313 | static struct die_info * | |
dee91e82 | 18314 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
18315 | const gdb_byte *info_ptr, |
18316 | const gdb_byte **new_info_ptr, | |
dee91e82 | 18317 | struct die_info *parent) |
639d11d3 DC |
18318 | { |
18319 | struct die_info *die; | |
d521ce57 | 18320 | const gdb_byte *cur_ptr; |
639d11d3 DC |
18321 | int has_children; |
18322 | ||
bf6af496 | 18323 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, &has_children, 0); |
1d325ec1 DJ |
18324 | if (die == NULL) |
18325 | { | |
18326 | *new_info_ptr = cur_ptr; | |
18327 | return NULL; | |
18328 | } | |
93311388 | 18329 | store_in_ref_table (die, reader->cu); |
639d11d3 DC |
18330 | |
18331 | if (has_children) | |
bf6af496 | 18332 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
18333 | else |
18334 | { | |
18335 | die->child = NULL; | |
18336 | *new_info_ptr = cur_ptr; | |
18337 | } | |
18338 | ||
18339 | die->sibling = NULL; | |
18340 | die->parent = parent; | |
18341 | return die; | |
18342 | } | |
18343 | ||
18344 | /* Read a die, all of its descendents, and all of its siblings; set | |
18345 | all of the fields of all of the dies correctly. Arguments are as | |
18346 | in read_die_and_children. */ | |
18347 | ||
18348 | static struct die_info * | |
bf6af496 | 18349 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
18350 | const gdb_byte *info_ptr, |
18351 | const gdb_byte **new_info_ptr, | |
bf6af496 | 18352 | struct die_info *parent) |
639d11d3 DC |
18353 | { |
18354 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 18355 | const gdb_byte *cur_ptr; |
639d11d3 | 18356 | |
c906108c | 18357 | cur_ptr = info_ptr; |
639d11d3 DC |
18358 | first_die = last_sibling = NULL; |
18359 | ||
18360 | while (1) | |
c906108c | 18361 | { |
639d11d3 | 18362 | struct die_info *die |
dee91e82 | 18363 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 18364 | |
1d325ec1 | 18365 | if (die == NULL) |
c906108c | 18366 | { |
639d11d3 DC |
18367 | *new_info_ptr = cur_ptr; |
18368 | return first_die; | |
c906108c | 18369 | } |
1d325ec1 DJ |
18370 | |
18371 | if (!first_die) | |
18372 | first_die = die; | |
c906108c | 18373 | else |
1d325ec1 DJ |
18374 | last_sibling->sibling = die; |
18375 | ||
18376 | last_sibling = die; | |
c906108c | 18377 | } |
c906108c SS |
18378 | } |
18379 | ||
bf6af496 DE |
18380 | /* Read a die, all of its descendents, and all of its siblings; set |
18381 | all of the fields of all of the dies correctly. Arguments are as | |
18382 | in read_die_and_children. | |
18383 | This the main entry point for reading a DIE and all its children. */ | |
18384 | ||
18385 | static struct die_info * | |
18386 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
18387 | const gdb_byte *info_ptr, |
18388 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
18389 | struct die_info *parent) |
18390 | { | |
18391 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
18392 | new_info_ptr, parent); | |
18393 | ||
b4f54984 | 18394 | if (dwarf_die_debug) |
bf6af496 DE |
18395 | { |
18396 | fprintf_unfiltered (gdb_stdlog, | |
18397 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 18398 | get_section_name (reader->die_section), |
bf6af496 DE |
18399 | (unsigned) (info_ptr - reader->die_section->buffer), |
18400 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18401 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
18402 | } |
18403 | ||
18404 | return die; | |
18405 | } | |
18406 | ||
3019eac3 DE |
18407 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
18408 | attributes. | |
18409 | The caller is responsible for filling in the extra attributes | |
18410 | and updating (*DIEP)->num_attrs. | |
18411 | Set DIEP to point to a newly allocated die with its information, | |
18412 | except for its child, sibling, and parent fields. | |
18413 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
93311388 | 18414 | |
d521ce57 | 18415 | static const gdb_byte * |
3019eac3 | 18416 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 18417 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 | 18418 | int *has_children, int num_extra_attrs) |
93311388 | 18419 | { |
b64f50a1 | 18420 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
18421 | struct abbrev_info *abbrev; |
18422 | struct die_info *die; | |
18423 | struct dwarf2_cu *cu = reader->cu; | |
18424 | bfd *abfd = reader->abfd; | |
18425 | ||
9c541725 | 18426 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
18427 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18428 | info_ptr += bytes_read; | |
18429 | if (!abbrev_number) | |
18430 | { | |
18431 | *diep = NULL; | |
18432 | *has_children = 0; | |
18433 | return info_ptr; | |
18434 | } | |
18435 | ||
685af9cd | 18436 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 18437 | if (!abbrev) |
348e048f DE |
18438 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
18439 | abbrev_number, | |
18440 | bfd_get_filename (abfd)); | |
18441 | ||
3019eac3 | 18442 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 18443 | die->sect_off = sect_off; |
93311388 DE |
18444 | die->tag = abbrev->tag; |
18445 | die->abbrev = abbrev_number; | |
18446 | ||
3019eac3 DE |
18447 | /* Make the result usable. |
18448 | The caller needs to update num_attrs after adding the extra | |
18449 | attributes. */ | |
93311388 DE |
18450 | die->num_attrs = abbrev->num_attrs; |
18451 | ||
18452 | for (i = 0; i < abbrev->num_attrs; ++i) | |
dee91e82 DE |
18453 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
18454 | info_ptr); | |
93311388 DE |
18455 | |
18456 | *diep = die; | |
18457 | *has_children = abbrev->has_children; | |
18458 | return info_ptr; | |
18459 | } | |
18460 | ||
3019eac3 DE |
18461 | /* Read a die and all its attributes. |
18462 | Set DIEP to point to a newly allocated die with its information, | |
18463 | except for its child, sibling, and parent fields. | |
18464 | Set HAS_CHILDREN to tell whether the die has children or not. */ | |
18465 | ||
d521ce57 | 18466 | static const gdb_byte * |
3019eac3 | 18467 | read_full_die (const struct die_reader_specs *reader, |
d521ce57 | 18468 | struct die_info **diep, const gdb_byte *info_ptr, |
3019eac3 DE |
18469 | int *has_children) |
18470 | { | |
d521ce57 | 18471 | const gdb_byte *result; |
bf6af496 DE |
18472 | |
18473 | result = read_full_die_1 (reader, diep, info_ptr, has_children, 0); | |
18474 | ||
b4f54984 | 18475 | if (dwarf_die_debug) |
bf6af496 DE |
18476 | { |
18477 | fprintf_unfiltered (gdb_stdlog, | |
18478 | "Read die from %s@0x%x of %s:\n", | |
a32a8923 | 18479 | get_section_name (reader->die_section), |
bf6af496 DE |
18480 | (unsigned) (info_ptr - reader->die_section->buffer), |
18481 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18482 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
18483 | } |
18484 | ||
18485 | return result; | |
3019eac3 | 18486 | } |
433df2d4 DE |
18487 | \f |
18488 | /* Abbreviation tables. | |
3019eac3 | 18489 | |
433df2d4 | 18490 | In DWARF version 2, the description of the debugging information is |
c906108c SS |
18491 | stored in a separate .debug_abbrev section. Before we read any |
18492 | dies from a section we read in all abbreviations and install them | |
433df2d4 DE |
18493 | in a hash table. */ |
18494 | ||
18495 | /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */ | |
18496 | ||
685af9cd TT |
18497 | struct abbrev_info * |
18498 | abbrev_table::alloc_abbrev () | |
433df2d4 DE |
18499 | { |
18500 | struct abbrev_info *abbrev; | |
18501 | ||
685af9cd | 18502 | abbrev = XOBNEW (&abbrev_obstack, struct abbrev_info); |
433df2d4 | 18503 | memset (abbrev, 0, sizeof (struct abbrev_info)); |
8d749320 | 18504 | |
433df2d4 DE |
18505 | return abbrev; |
18506 | } | |
18507 | ||
18508 | /* Add an abbreviation to the table. */ | |
c906108c | 18509 | |
685af9cd TT |
18510 | void |
18511 | abbrev_table::add_abbrev (unsigned int abbrev_number, | |
18512 | struct abbrev_info *abbrev) | |
433df2d4 DE |
18513 | { |
18514 | unsigned int hash_number; | |
18515 | ||
18516 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 YQ |
18517 | abbrev->next = m_abbrevs[hash_number]; |
18518 | m_abbrevs[hash_number] = abbrev; | |
433df2d4 | 18519 | } |
dee91e82 | 18520 | |
433df2d4 DE |
18521 | /* Look up an abbrev in the table. |
18522 | Returns NULL if the abbrev is not found. */ | |
18523 | ||
685af9cd TT |
18524 | struct abbrev_info * |
18525 | abbrev_table::lookup_abbrev (unsigned int abbrev_number) | |
c906108c | 18526 | { |
433df2d4 DE |
18527 | unsigned int hash_number; |
18528 | struct abbrev_info *abbrev; | |
18529 | ||
18530 | hash_number = abbrev_number % ABBREV_HASH_SIZE; | |
4a17f768 | 18531 | abbrev = m_abbrevs[hash_number]; |
433df2d4 DE |
18532 | |
18533 | while (abbrev) | |
18534 | { | |
18535 | if (abbrev->number == abbrev_number) | |
18536 | return abbrev; | |
18537 | abbrev = abbrev->next; | |
18538 | } | |
18539 | return NULL; | |
18540 | } | |
18541 | ||
18542 | /* Read in an abbrev table. */ | |
18543 | ||
685af9cd | 18544 | static abbrev_table_up |
ed2dc618 SM |
18545 | abbrev_table_read_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18546 | struct dwarf2_section_info *section, | |
9c541725 | 18547 | sect_offset sect_off) |
433df2d4 DE |
18548 | { |
18549 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
a32a8923 | 18550 | bfd *abfd = get_section_bfd_owner (section); |
d521ce57 | 18551 | const gdb_byte *abbrev_ptr; |
c906108c SS |
18552 | struct abbrev_info *cur_abbrev; |
18553 | unsigned int abbrev_number, bytes_read, abbrev_name; | |
433df2d4 | 18554 | unsigned int abbrev_form; |
6dfa2fc2 | 18555 | std::vector<struct attr_abbrev> cur_attrs; |
c906108c | 18556 | |
685af9cd | 18557 | abbrev_table_up abbrev_table (new struct abbrev_table (sect_off)); |
c906108c | 18558 | |
433df2d4 | 18559 | dwarf2_read_section (objfile, section); |
9c541725 | 18560 | abbrev_ptr = section->buffer + to_underlying (sect_off); |
c906108c SS |
18561 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18562 | abbrev_ptr += bytes_read; | |
18563 | ||
0963b4bd | 18564 | /* Loop until we reach an abbrev number of 0. */ |
c906108c SS |
18565 | while (abbrev_number) |
18566 | { | |
6dfa2fc2 | 18567 | cur_attrs.clear (); |
685af9cd | 18568 | cur_abbrev = abbrev_table->alloc_abbrev (); |
c906108c SS |
18569 | |
18570 | /* read in abbrev header */ | |
18571 | cur_abbrev->number = abbrev_number; | |
aead7601 SM |
18572 | cur_abbrev->tag |
18573 | = (enum dwarf_tag) read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
c906108c SS |
18574 | abbrev_ptr += bytes_read; |
18575 | cur_abbrev->has_children = read_1_byte (abfd, abbrev_ptr); | |
18576 | abbrev_ptr += 1; | |
18577 | ||
18578 | /* now read in declarations */ | |
22d2f3ab | 18579 | for (;;) |
c906108c | 18580 | { |
43988095 JK |
18581 | LONGEST implicit_const; |
18582 | ||
22d2f3ab JK |
18583 | abbrev_name = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); |
18584 | abbrev_ptr += bytes_read; | |
18585 | abbrev_form = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18586 | abbrev_ptr += bytes_read; | |
43988095 JK |
18587 | if (abbrev_form == DW_FORM_implicit_const) |
18588 | { | |
18589 | implicit_const = read_signed_leb128 (abfd, abbrev_ptr, | |
18590 | &bytes_read); | |
18591 | abbrev_ptr += bytes_read; | |
18592 | } | |
18593 | else | |
18594 | { | |
18595 | /* Initialize it due to a false compiler warning. */ | |
18596 | implicit_const = -1; | |
18597 | } | |
22d2f3ab JK |
18598 | |
18599 | if (abbrev_name == 0) | |
18600 | break; | |
18601 | ||
6dfa2fc2 TT |
18602 | cur_attrs.emplace_back (); |
18603 | struct attr_abbrev &cur_attr = cur_attrs.back (); | |
18604 | cur_attr.name = (enum dwarf_attribute) abbrev_name; | |
18605 | cur_attr.form = (enum dwarf_form) abbrev_form; | |
18606 | cur_attr.implicit_const = implicit_const; | |
22d2f3ab | 18607 | ++cur_abbrev->num_attrs; |
c906108c SS |
18608 | } |
18609 | ||
8d749320 SM |
18610 | cur_abbrev->attrs = |
18611 | XOBNEWVEC (&abbrev_table->abbrev_obstack, struct attr_abbrev, | |
18612 | cur_abbrev->num_attrs); | |
6dfa2fc2 | 18613 | memcpy (cur_abbrev->attrs, cur_attrs.data (), |
f3dd6933 DJ |
18614 | cur_abbrev->num_attrs * sizeof (struct attr_abbrev)); |
18615 | ||
685af9cd | 18616 | abbrev_table->add_abbrev (abbrev_number, cur_abbrev); |
c906108c SS |
18617 | |
18618 | /* Get next abbreviation. | |
18619 | Under Irix6 the abbreviations for a compilation unit are not | |
c5aa993b JM |
18620 | always properly terminated with an abbrev number of 0. |
18621 | Exit loop if we encounter an abbreviation which we have | |
18622 | already read (which means we are about to read the abbreviations | |
18623 | for the next compile unit) or if the end of the abbreviation | |
18624 | table is reached. */ | |
433df2d4 | 18625 | if ((unsigned int) (abbrev_ptr - section->buffer) >= section->size) |
c906108c SS |
18626 | break; |
18627 | abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); | |
18628 | abbrev_ptr += bytes_read; | |
685af9cd | 18629 | if (abbrev_table->lookup_abbrev (abbrev_number) != NULL) |
c906108c SS |
18630 | break; |
18631 | } | |
f3dd6933 | 18632 | |
433df2d4 | 18633 | return abbrev_table; |
c906108c SS |
18634 | } |
18635 | ||
72bf9492 DJ |
18636 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18637 | symbol for. */ | |
18638 | ||
18639 | static int | |
18640 | is_type_tag_for_partial (int tag) | |
18641 | { | |
18642 | switch (tag) | |
18643 | { | |
18644 | #if 0 | |
18645 | /* Some types that would be reasonable to generate partial symbols for, | |
18646 | that we don't at present. */ | |
18647 | case DW_TAG_array_type: | |
18648 | case DW_TAG_file_type: | |
18649 | case DW_TAG_ptr_to_member_type: | |
18650 | case DW_TAG_set_type: | |
18651 | case DW_TAG_string_type: | |
18652 | case DW_TAG_subroutine_type: | |
18653 | #endif | |
18654 | case DW_TAG_base_type: | |
18655 | case DW_TAG_class_type: | |
680b30c7 | 18656 | case DW_TAG_interface_type: |
72bf9492 DJ |
18657 | case DW_TAG_enumeration_type: |
18658 | case DW_TAG_structure_type: | |
18659 | case DW_TAG_subrange_type: | |
18660 | case DW_TAG_typedef: | |
18661 | case DW_TAG_union_type: | |
18662 | return 1; | |
18663 | default: | |
18664 | return 0; | |
18665 | } | |
18666 | } | |
18667 | ||
18668 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18669 | ||
18670 | static struct partial_die_info * | |
dee91e82 | 18671 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18672 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18673 | { |
dee91e82 | 18674 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 18675 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 18676 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18677 | unsigned int bytes_read; |
5afb4e99 | 18678 | unsigned int load_all = 0; |
72bf9492 DJ |
18679 | int nesting_level = 1; |
18680 | ||
18681 | parent_die = NULL; | |
18682 | last_die = NULL; | |
18683 | ||
7adf1e79 DE |
18684 | gdb_assert (cu->per_cu != NULL); |
18685 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18686 | load_all = 1; |
18687 | ||
72bf9492 DJ |
18688 | cu->partial_dies |
18689 | = htab_create_alloc_ex (cu->header.length / 12, | |
18690 | partial_die_hash, | |
18691 | partial_die_eq, | |
18692 | NULL, | |
18693 | &cu->comp_unit_obstack, | |
18694 | hashtab_obstack_allocate, | |
18695 | dummy_obstack_deallocate); | |
18696 | ||
72bf9492 DJ |
18697 | while (1) |
18698 | { | |
685af9cd | 18699 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
18700 | |
18701 | /* A NULL abbrev means the end of a series of children. */ | |
18702 | if (abbrev == NULL) | |
18703 | { | |
18704 | if (--nesting_level == 0) | |
cd9983dd YQ |
18705 | return first_die; |
18706 | ||
72bf9492 DJ |
18707 | info_ptr += bytes_read; |
18708 | last_die = parent_die; | |
18709 | parent_die = parent_die->die_parent; | |
18710 | continue; | |
18711 | } | |
18712 | ||
98bfdba5 PA |
18713 | /* Check for template arguments. We never save these; if |
18714 | they're seen, we just mark the parent, and go on our way. */ | |
18715 | if (parent_die != NULL | |
18716 | && cu->language == language_cplus | |
18717 | && (abbrev->tag == DW_TAG_template_type_param | |
18718 | || abbrev->tag == DW_TAG_template_value_param)) | |
18719 | { | |
18720 | parent_die->has_template_arguments = 1; | |
18721 | ||
18722 | if (!load_all) | |
18723 | { | |
18724 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18725 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18726 | continue; |
18727 | } | |
18728 | } | |
18729 | ||
0d99eb77 | 18730 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18731 | Skip their other children. */ |
18732 | if (!load_all | |
18733 | && cu->language == language_cplus | |
18734 | && parent_die != NULL | |
18735 | && parent_die->tag == DW_TAG_subprogram) | |
18736 | { | |
dee91e82 | 18737 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18738 | continue; |
18739 | } | |
18740 | ||
5afb4e99 DJ |
18741 | /* Check whether this DIE is interesting enough to save. Normally |
18742 | we would not be interested in members here, but there may be | |
18743 | later variables referencing them via DW_AT_specification (for | |
18744 | static members). */ | |
18745 | if (!load_all | |
18746 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 18747 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18748 | && abbrev->tag != DW_TAG_enumerator |
18749 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18750 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18751 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18752 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18753 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18754 | && abbrev->tag != DW_TAG_module |
95554aad | 18755 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18756 | && abbrev->tag != DW_TAG_imported_unit |
18757 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18758 | { |
18759 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18760 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18761 | continue; |
18762 | } | |
18763 | ||
6f06d47b YQ |
18764 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18765 | abbrev); | |
cd9983dd | 18766 | |
48fbe735 | 18767 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18768 | |
18769 | /* This two-pass algorithm for processing partial symbols has a | |
18770 | high cost in cache pressure. Thus, handle some simple cases | |
18771 | here which cover the majority of C partial symbols. DIEs | |
18772 | which neither have specification tags in them, nor could have | |
18773 | specification tags elsewhere pointing at them, can simply be | |
18774 | processed and discarded. | |
18775 | ||
18776 | This segment is also optional; scan_partial_symbols and | |
18777 | add_partial_symbol will handle these DIEs if we chain | |
18778 | them in normally. When compilers which do not emit large | |
18779 | quantities of duplicate debug information are more common, | |
18780 | this code can probably be removed. */ | |
18781 | ||
18782 | /* Any complete simple types at the top level (pretty much all | |
18783 | of them, for a language without namespaces), can be processed | |
18784 | directly. */ | |
18785 | if (parent_die == NULL | |
cd9983dd YQ |
18786 | && pdi.has_specification == 0 |
18787 | && pdi.is_declaration == 0 | |
18788 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18789 | || pdi.tag == DW_TAG_base_type | |
18790 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 18791 | { |
cd9983dd | 18792 | if (building_psymtab && pdi.name != NULL) |
31edb802 | 18793 | add_psymbol_to_list (pdi.name, false, |
79748972 | 18794 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 18795 | psymbol_placement::STATIC, |
1762568f | 18796 | 0, cu->language, objfile); |
cd9983dd | 18797 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18798 | continue; |
18799 | } | |
18800 | ||
d8228535 JK |
18801 | /* The exception for DW_TAG_typedef with has_children above is |
18802 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18803 | type_name_or_error will error on such types later. |
d8228535 JK |
18804 | |
18805 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18806 | it could not find the child DIEs referenced later, this is checked | |
18807 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18808 | ||
cd9983dd | 18809 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18810 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18811 | "- DIE at %s [in module %s]"), |
cd9983dd | 18812 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18813 | |
72bf9492 DJ |
18814 | /* If we're at the second level, and we're an enumerator, and |
18815 | our parent has no specification (meaning possibly lives in a | |
18816 | namespace elsewhere), then we can add the partial symbol now | |
18817 | instead of queueing it. */ | |
cd9983dd | 18818 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18819 | && parent_die != NULL |
18820 | && parent_die->die_parent == NULL | |
18821 | && parent_die->tag == DW_TAG_enumeration_type | |
18822 | && parent_die->has_specification == 0) | |
18823 | { | |
cd9983dd | 18824 | if (pdi.name == NULL) |
b98664d3 | 18825 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18826 | else if (building_psymtab) |
31edb802 | 18827 | add_psymbol_to_list (pdi.name, false, |
79748972 | 18828 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 18829 | cu->language == language_cplus |
75aedd27 TT |
18830 | ? psymbol_placement::GLOBAL |
18831 | : psymbol_placement::STATIC, | |
1762568f | 18832 | 0, cu->language, objfile); |
72bf9492 | 18833 | |
cd9983dd | 18834 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18835 | continue; |
18836 | } | |
18837 | ||
cd9983dd | 18838 | struct partial_die_info *part_die |
6f06d47b | 18839 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18840 | |
72bf9492 DJ |
18841 | /* We'll save this DIE so link it in. */ |
18842 | part_die->die_parent = parent_die; | |
18843 | part_die->die_sibling = NULL; | |
18844 | part_die->die_child = NULL; | |
18845 | ||
18846 | if (last_die && last_die == parent_die) | |
18847 | last_die->die_child = part_die; | |
18848 | else if (last_die) | |
18849 | last_die->die_sibling = part_die; | |
18850 | ||
18851 | last_die = part_die; | |
18852 | ||
18853 | if (first_die == NULL) | |
18854 | first_die = part_die; | |
18855 | ||
18856 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
18857 | find interesting need to be in the hash table, because we | |
18858 | also have the parent/sibling/child chains; only those that we | |
18859 | might refer to by offset later during partial symbol reading. | |
18860 | ||
18861 | For now this means things that might have be the target of a | |
18862 | DW_AT_specification, DW_AT_abstract_origin, or | |
18863 | DW_AT_extension. DW_AT_extension will refer only to | |
18864 | namespaces; DW_AT_abstract_origin refers to functions (and | |
18865 | many things under the function DIE, but we do not recurse | |
18866 | into function DIEs during partial symbol reading) and | |
18867 | possibly variables as well; DW_AT_specification refers to | |
18868 | declarations. Declarations ought to have the DW_AT_declaration | |
18869 | flag. It happens that GCC forgets to put it in sometimes, but | |
18870 | only for functions, not for types. | |
18871 | ||
18872 | Adding more things than necessary to the hash table is harmless | |
18873 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
18874 | wasted time in find_partial_die, when we reread the compilation |
18875 | unit with load_all_dies set. */ | |
72bf9492 | 18876 | |
5afb4e99 | 18877 | if (load_all |
72929c62 | 18878 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 18879 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
18880 | || abbrev->tag == DW_TAG_variable |
18881 | || abbrev->tag == DW_TAG_namespace | |
18882 | || part_die->is_declaration) | |
18883 | { | |
18884 | void **slot; | |
18885 | ||
18886 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
18887 | to_underlying (part_die->sect_off), |
18888 | INSERT); | |
72bf9492 DJ |
18889 | *slot = part_die; |
18890 | } | |
18891 | ||
72bf9492 | 18892 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 18893 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
18894 | languages we have to, so that we can get at method physnames |
18895 | to infer fully qualified class names, for DW_AT_specification, | |
18896 | and for C++ template arguments. For C++, we also look one level | |
18897 | inside functions to find template arguments (if the name of the | |
18898 | function does not already contain the template arguments). | |
bc30ff58 | 18899 | |
0a4b0913 AB |
18900 | For Ada and Fortran, we need to scan the children of subprograms |
18901 | and lexical blocks as well because these languages allow the | |
18902 | definition of nested entities that could be interesting for the | |
18903 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 18904 | if (last_die->has_children |
5afb4e99 DJ |
18905 | && (load_all |
18906 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 18907 | || last_die->tag == DW_TAG_module |
72bf9492 | 18908 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
18909 | || (cu->language == language_cplus |
18910 | && last_die->tag == DW_TAG_subprogram | |
18911 | && (last_die->name == NULL | |
18912 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
18913 | || (cu->language != language_c |
18914 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 18915 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 18916 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 18917 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
18918 | || ((cu->language == language_ada |
18919 | || cu->language == language_fortran) | |
bc30ff58 JB |
18920 | && (last_die->tag == DW_TAG_subprogram |
18921 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
18922 | { |
18923 | nesting_level++; | |
18924 | parent_die = last_die; | |
18925 | continue; | |
18926 | } | |
18927 | ||
18928 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18929 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
18930 | |
18931 | /* Back to the top, do it again. */ | |
18932 | } | |
18933 | } | |
18934 | ||
6f06d47b YQ |
18935 | partial_die_info::partial_die_info (sect_offset sect_off_, |
18936 | struct abbrev_info *abbrev) | |
18937 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
18938 | { | |
18939 | } | |
18940 | ||
35cc7ed7 YQ |
18941 | /* Read a minimal amount of information into the minimal die structure. |
18942 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 18943 | |
48fbe735 YQ |
18944 | const gdb_byte * |
18945 | partial_die_info::read (const struct die_reader_specs *reader, | |
18946 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 18947 | { |
dee91e82 | 18948 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18949 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18950 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 18951 | unsigned int i; |
c5aa993b | 18952 | int has_low_pc_attr = 0; |
c906108c | 18953 | int has_high_pc_attr = 0; |
91da1414 | 18954 | int high_pc_relative = 0; |
c906108c | 18955 | |
fd0a254f | 18956 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 18957 | { |
48fbe735 YQ |
18958 | struct attribute attr; |
18959 | ||
fd0a254f | 18960 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], info_ptr); |
c906108c SS |
18961 | |
18962 | /* Store the data if it is of an attribute we want to keep in a | |
c5aa993b | 18963 | partial symbol table. */ |
c906108c SS |
18964 | switch (attr.name) |
18965 | { | |
18966 | case DW_AT_name: | |
48fbe735 | 18967 | switch (tag) |
71c25dea TT |
18968 | { |
18969 | case DW_TAG_compile_unit: | |
95554aad | 18970 | case DW_TAG_partial_unit: |
348e048f | 18971 | case DW_TAG_type_unit: |
71c25dea TT |
18972 | /* Compilation units have a DW_AT_name that is a filename, not |
18973 | a source language identifier. */ | |
18974 | case DW_TAG_enumeration_type: | |
18975 | case DW_TAG_enumerator: | |
18976 | /* These tags always have simple identifiers already; no need | |
18977 | to canonicalize them. */ | |
48fbe735 | 18978 | name = DW_STRING (&attr); |
71c25dea TT |
18979 | break; |
18980 | default: | |
48fbe735 YQ |
18981 | { |
18982 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18983 | ||
18984 | name | |
18985 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, | |
18986 | &objfile->per_bfd->storage_obstack); | |
18987 | } | |
71c25dea TT |
18988 | break; |
18989 | } | |
c906108c | 18990 | break; |
31ef98ae | 18991 | case DW_AT_linkage_name: |
c906108c | 18992 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18993 | /* Note that both forms of linkage name might appear. We |
18994 | assume they will be the same, and we only store the last | |
18995 | one we see. */ | |
48fbe735 | 18996 | linkage_name = DW_STRING (&attr); |
c906108c SS |
18997 | break; |
18998 | case DW_AT_low_pc: | |
18999 | has_low_pc_attr = 1; | |
48fbe735 | 19000 | lowpc = attr_value_as_address (&attr); |
c906108c SS |
19001 | break; |
19002 | case DW_AT_high_pc: | |
19003 | has_high_pc_attr = 1; | |
48fbe735 | 19004 | highpc = attr_value_as_address (&attr); |
31aa7e4e JB |
19005 | if (cu->header.version >= 4 && attr_form_is_constant (&attr)) |
19006 | high_pc_relative = 1; | |
c906108c SS |
19007 | break; |
19008 | case DW_AT_location: | |
0963b4bd | 19009 | /* Support the .debug_loc offsets. */ |
8e19ed76 PS |
19010 | if (attr_form_is_block (&attr)) |
19011 | { | |
48fbe735 | 19012 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 19013 | } |
3690dd37 | 19014 | else if (attr_form_is_section_offset (&attr)) |
8e19ed76 | 19015 | { |
4d3c2250 | 19016 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
19017 | } |
19018 | else | |
19019 | { | |
4d3c2250 KB |
19020 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
19021 | "partial symbol information"); | |
8e19ed76 | 19022 | } |
c906108c | 19023 | break; |
c906108c | 19024 | case DW_AT_external: |
48fbe735 | 19025 | is_external = DW_UNSND (&attr); |
c906108c SS |
19026 | break; |
19027 | case DW_AT_declaration: | |
48fbe735 | 19028 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
19029 | break; |
19030 | case DW_AT_type: | |
48fbe735 | 19031 | has_type = 1; |
c906108c SS |
19032 | break; |
19033 | case DW_AT_abstract_origin: | |
19034 | case DW_AT_specification: | |
72bf9492 | 19035 | case DW_AT_extension: |
48fbe735 YQ |
19036 | has_specification = 1; |
19037 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
19038 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 19039 | || cu->per_cu->is_dwz); |
c906108c SS |
19040 | break; |
19041 | case DW_AT_sibling: | |
19042 | /* Ignore absolute siblings, they might point outside of | |
19043 | the current compile unit. */ | |
19044 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 19045 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 19046 | else |
b9502d3f | 19047 | { |
48fbe735 | 19048 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
19049 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
19050 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
19051 | |
19052 | if (sibling_ptr < info_ptr) | |
b98664d3 | 19053 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 KS |
19054 | else if (sibling_ptr > reader->buffer_end) |
19055 | dwarf2_section_buffer_overflow_complaint (reader->die_section); | |
b9502d3f | 19056 | else |
48fbe735 | 19057 | sibling = sibling_ptr; |
b9502d3f | 19058 | } |
c906108c | 19059 | break; |
fa4028e9 | 19060 | case DW_AT_byte_size: |
48fbe735 | 19061 | has_byte_size = 1; |
fa4028e9 | 19062 | break; |
ff908ebf | 19063 | case DW_AT_const_value: |
48fbe735 | 19064 | has_const_value = 1; |
ff908ebf | 19065 | break; |
68511cec CES |
19066 | case DW_AT_calling_convention: |
19067 | /* DWARF doesn't provide a way to identify a program's source-level | |
19068 | entry point. DW_AT_calling_convention attributes are only meant | |
19069 | to describe functions' calling conventions. | |
19070 | ||
19071 | However, because it's a necessary piece of information in | |
0c1b455e TT |
19072 | Fortran, and before DWARF 4 DW_CC_program was the only |
19073 | piece of debugging information whose definition refers to | |
19074 | a 'main program' at all, several compilers marked Fortran | |
19075 | main programs with DW_CC_program --- even when those | |
19076 | functions use the standard calling conventions. | |
19077 | ||
19078 | Although DWARF now specifies a way to provide this | |
19079 | information, we support this practice for backward | |
19080 | compatibility. */ | |
68511cec | 19081 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 19082 | && cu->language == language_fortran) |
48fbe735 | 19083 | main_subprogram = 1; |
68511cec | 19084 | break; |
481860b3 GB |
19085 | case DW_AT_inline: |
19086 | if (DW_UNSND (&attr) == DW_INL_inlined | |
19087 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 19088 | may_be_inlined = 1; |
481860b3 | 19089 | break; |
95554aad TT |
19090 | |
19091 | case DW_AT_import: | |
48fbe735 | 19092 | if (tag == DW_TAG_imported_unit) |
36586728 | 19093 | { |
48fbe735 YQ |
19094 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
19095 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
19096 | || cu->per_cu->is_dwz); |
19097 | } | |
95554aad TT |
19098 | break; |
19099 | ||
0c1b455e | 19100 | case DW_AT_main_subprogram: |
48fbe735 | 19101 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
19102 | break; |
19103 | ||
05caa1d2 TT |
19104 | case DW_AT_ranges: |
19105 | { | |
19106 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
19107 | but that requires a full DIE, so instead we just | |
19108 | reimplement it. */ | |
19109 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
19110 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
19111 | + (need_ranges_base | |
19112 | ? cu->ranges_base | |
19113 | : 0)); | |
19114 | ||
19115 | /* Value of the DW_AT_ranges attribute is the offset in the | |
19116 | .debug_ranges section. */ | |
19117 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
19118 | nullptr)) | |
19119 | has_pc_info = 1; | |
19120 | } | |
19121 | break; | |
19122 | ||
c906108c SS |
19123 | default: |
19124 | break; | |
19125 | } | |
19126 | } | |
19127 | ||
10d06d82 TT |
19128 | /* For Ada, if both the name and the linkage name appear, we prefer |
19129 | the latter. This lets "catch exception" work better, regardless | |
19130 | of the order in which the name and linkage name were emitted. | |
19131 | Really, though, this is just a workaround for the fact that gdb | |
19132 | doesn't store both the name and the linkage name. */ | |
19133 | if (cu->language == language_ada && linkage_name != nullptr) | |
19134 | name = linkage_name; | |
19135 | ||
91da1414 | 19136 | if (high_pc_relative) |
48fbe735 | 19137 | highpc += lowpc; |
91da1414 | 19138 | |
9373cf26 JK |
19139 | if (has_low_pc_attr && has_high_pc_attr) |
19140 | { | |
19141 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
19142 | eliminate duplicate copies of functions and vtables and such. | |
19143 | The linker will arbitrarily choose one and discard the others. | |
19144 | The AT_*_pc values for such functions refer to local labels in | |
19145 | these sections. If the section from that file was discarded, the | |
19146 | labels are not in the output, so the relocs get a value of 0. | |
19147 | If this is a discarded function, mark the pc bounds as invalid, | |
19148 | so that GDB will ignore it. */ | |
48fbe735 | 19149 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 19150 | { |
48fbe735 | 19151 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 19152 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 19153 | |
b98664d3 | 19154 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 19155 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
19156 | paddress (gdbarch, lowpc), |
19157 | sect_offset_str (sect_off), | |
9d8780f0 | 19158 | objfile_name (objfile)); |
9373cf26 JK |
19159 | } |
19160 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 19161 | else if (lowpc >= highpc) |
9373cf26 | 19162 | { |
48fbe735 | 19163 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 19164 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 19165 | |
b98664d3 | 19166 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 19167 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
19168 | paddress (gdbarch, lowpc), |
19169 | paddress (gdbarch, highpc), | |
19170 | sect_offset_str (sect_off), | |
9c541725 | 19171 | objfile_name (objfile)); |
9373cf26 JK |
19172 | } |
19173 | else | |
48fbe735 | 19174 | has_pc_info = 1; |
9373cf26 | 19175 | } |
85cbf3d3 | 19176 | |
c906108c SS |
19177 | return info_ptr; |
19178 | } | |
19179 | ||
72bf9492 DJ |
19180 | /* Find a cached partial DIE at OFFSET in CU. */ |
19181 | ||
d590ff25 YQ |
19182 | struct partial_die_info * |
19183 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
19184 | { |
19185 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 19186 | struct partial_die_info part_die (sect_off); |
72bf9492 | 19187 | |
9a3c8263 | 19188 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 19189 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 19190 | to_underlying (sect_off))); |
72bf9492 | 19191 | |
72bf9492 DJ |
19192 | return lookup_die; |
19193 | } | |
19194 | ||
348e048f DE |
19195 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
19196 | except in the case of .debug_types DIEs which do not reference | |
19197 | outside their CU (they do however referencing other types via | |
55f1336d | 19198 | DW_FORM_ref_sig8). */ |
72bf9492 | 19199 | |
122cf0f2 | 19200 | static const struct cu_partial_die_info |
9c541725 | 19201 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 19202 | { |
518817b3 SM |
19203 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19204 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 19205 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
19206 | struct dwarf2_per_cu_data *per_cu = NULL; |
19207 | struct partial_die_info *pd = NULL; | |
72bf9492 | 19208 | |
36586728 | 19209 | if (offset_in_dwz == cu->per_cu->is_dwz |
9c541725 | 19210 | && offset_in_cu_p (&cu->header, sect_off)) |
5afb4e99 | 19211 | { |
d590ff25 | 19212 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 19213 | if (pd != NULL) |
fb816e8b | 19214 | return { cu, pd }; |
0d99eb77 DE |
19215 | /* We missed recording what we needed. |
19216 | Load all dies and try again. */ | |
19217 | per_cu = cu->per_cu; | |
5afb4e99 | 19218 | } |
0d99eb77 DE |
19219 | else |
19220 | { | |
19221 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 19222 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 19223 | { |
9d8780f0 SM |
19224 | error (_("Dwarf Error: Type Unit at offset %s contains" |
19225 | " external reference to offset %s [in module %s].\n"), | |
19226 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
19227 | bfd_get_filename (objfile->obfd)); |
19228 | } | |
9c541725 | 19229 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 19230 | dwarf2_per_objfile); |
72bf9492 | 19231 | |
0d99eb77 DE |
19232 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
19233 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 19234 | |
0d99eb77 | 19235 | per_cu->cu->last_used = 0; |
d590ff25 | 19236 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 19237 | } |
5afb4e99 | 19238 | |
dee91e82 DE |
19239 | /* If we didn't find it, and not all dies have been loaded, |
19240 | load them all and try again. */ | |
19241 | ||
5afb4e99 DJ |
19242 | if (pd == NULL && per_cu->load_all_dies == 0) |
19243 | { | |
5afb4e99 | 19244 | per_cu->load_all_dies = 1; |
fd820528 DE |
19245 | |
19246 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
19247 | THIS_CU->cu may already be in use. So we can't just free it and | |
19248 | replace its DIEs with the ones we read in. Instead, we leave those | |
19249 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
19250 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
19251 | set. */ | |
dee91e82 | 19252 | load_partial_comp_unit (per_cu); |
5afb4e99 | 19253 | |
d590ff25 | 19254 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
19255 | } |
19256 | ||
19257 | if (pd == NULL) | |
19258 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 19259 | _("could not find partial DIE %s " |
3e43a32a | 19260 | "in cache [from module %s]\n"), |
9d8780f0 | 19261 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 19262 | return { per_cu->cu, pd }; |
72bf9492 DJ |
19263 | } |
19264 | ||
abc72ce4 DE |
19265 | /* See if we can figure out if the class lives in a namespace. We do |
19266 | this by looking for a member function; its demangled name will | |
19267 | contain namespace info, if there is any. */ | |
19268 | ||
19269 | static void | |
19270 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
19271 | struct dwarf2_cu *cu) | |
19272 | { | |
19273 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
19274 | what template types look like, because the demangler | |
19275 | frequently doesn't give the same name as the debug info. We | |
19276 | could fix this by only using the demangled name to get the | |
19277 | prefix (but see comment in read_structure_type). */ | |
19278 | ||
19279 | struct partial_die_info *real_pdi; | |
19280 | struct partial_die_info *child_pdi; | |
19281 | ||
19282 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
19283 | we should not do this. We'll prepend the parent's fully qualified | |
19284 | name when we create the partial symbol. */ | |
19285 | ||
19286 | real_pdi = struct_pdi; | |
19287 | while (real_pdi->has_specification) | |
fb816e8b | 19288 | { |
122cf0f2 AB |
19289 | auto res = find_partial_die (real_pdi->spec_offset, |
19290 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
19291 | real_pdi = res.pdi; |
19292 | cu = res.cu; | |
19293 | } | |
abc72ce4 DE |
19294 | |
19295 | if (real_pdi->die_parent != NULL) | |
19296 | return; | |
19297 | ||
19298 | for (child_pdi = struct_pdi->die_child; | |
19299 | child_pdi != NULL; | |
19300 | child_pdi = child_pdi->die_sibling) | |
19301 | { | |
19302 | if (child_pdi->tag == DW_TAG_subprogram | |
19303 | && child_pdi->linkage_name != NULL) | |
19304 | { | |
43816ebc TT |
19305 | gdb::unique_xmalloc_ptr<char> actual_class_name |
19306 | (language_class_name_from_physname (cu->language_defn, | |
19307 | child_pdi->linkage_name)); | |
abc72ce4 DE |
19308 | if (actual_class_name != NULL) |
19309 | { | |
518817b3 | 19310 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 | 19311 | struct_pdi->name |
021887d8 | 19312 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
43816ebc | 19313 | actual_class_name.get ()); |
abc72ce4 DE |
19314 | } |
19315 | break; | |
19316 | } | |
19317 | } | |
19318 | } | |
19319 | ||
52356b79 YQ |
19320 | void |
19321 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 19322 | { |
abc72ce4 DE |
19323 | /* Once we've fixed up a die, there's no point in doing so again. |
19324 | This also avoids a memory leak if we were to call | |
19325 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 19326 | if (fixup_called) |
abc72ce4 DE |
19327 | return; |
19328 | ||
72bf9492 DJ |
19329 | /* If we found a reference attribute and the DIE has no name, try |
19330 | to find a name in the referred to DIE. */ | |
19331 | ||
52356b79 | 19332 | if (name == NULL && has_specification) |
72bf9492 DJ |
19333 | { |
19334 | struct partial_die_info *spec_die; | |
72bf9492 | 19335 | |
122cf0f2 | 19336 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
19337 | spec_die = res.pdi; |
19338 | cu = res.cu; | |
72bf9492 | 19339 | |
52356b79 | 19340 | spec_die->fixup (cu); |
72bf9492 DJ |
19341 | |
19342 | if (spec_die->name) | |
19343 | { | |
52356b79 | 19344 | name = spec_die->name; |
72bf9492 DJ |
19345 | |
19346 | /* Copy DW_AT_external attribute if it is set. */ | |
19347 | if (spec_die->is_external) | |
52356b79 | 19348 | is_external = spec_die->is_external; |
72bf9492 DJ |
19349 | } |
19350 | } | |
19351 | ||
19352 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 19353 | |
52356b79 YQ |
19354 | if (name == NULL && tag == DW_TAG_namespace) |
19355 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 19356 | |
abc72ce4 DE |
19357 | /* If there is no parent die to provide a namespace, and there are |
19358 | children, see if we can determine the namespace from their linkage | |
122d1940 | 19359 | name. */ |
abc72ce4 | 19360 | if (cu->language == language_cplus |
fd5866f6 | 19361 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
19362 | && die_parent == NULL |
19363 | && has_children | |
19364 | && (tag == DW_TAG_class_type | |
19365 | || tag == DW_TAG_structure_type | |
19366 | || tag == DW_TAG_union_type)) | |
19367 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 19368 | |
53832f31 TT |
19369 | /* GCC might emit a nameless struct or union that has a linkage |
19370 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
19371 | if (name == NULL |
19372 | && (tag == DW_TAG_class_type | |
19373 | || tag == DW_TAG_interface_type | |
19374 | || tag == DW_TAG_structure_type | |
19375 | || tag == DW_TAG_union_type) | |
19376 | && linkage_name != NULL) | |
53832f31 | 19377 | { |
43816ebc TT |
19378 | gdb::unique_xmalloc_ptr<char> demangled |
19379 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
19380 | if (demangled != nullptr) | |
53832f31 | 19381 | { |
96408a79 SA |
19382 | const char *base; |
19383 | ||
19384 | /* Strip any leading namespaces/classes, keep only the base name. | |
19385 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
19386 | base = strrchr (demangled.get (), ':'); |
19387 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
19388 | base++; |
19389 | else | |
43816ebc | 19390 | base = demangled.get (); |
96408a79 | 19391 | |
518817b3 | 19392 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
021887d8 | 19393 | name = obstack_strdup (&objfile->per_bfd->storage_obstack, base); |
53832f31 TT |
19394 | } |
19395 | } | |
19396 | ||
52356b79 | 19397 | fixup_called = 1; |
72bf9492 DJ |
19398 | } |
19399 | ||
a8329558 | 19400 | /* Read an attribute value described by an attribute form. */ |
c906108c | 19401 | |
d521ce57 | 19402 | static const gdb_byte * |
dee91e82 DE |
19403 | read_attribute_value (const struct die_reader_specs *reader, |
19404 | struct attribute *attr, unsigned form, | |
43988095 | 19405 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 19406 | { |
dee91e82 | 19407 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
19408 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19409 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 19410 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 19411 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 19412 | bfd *abfd = reader->abfd; |
e7c27a73 | 19413 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19414 | unsigned int bytes_read; |
19415 | struct dwarf_block *blk; | |
19416 | ||
aead7601 | 19417 | attr->form = (enum dwarf_form) form; |
a8329558 | 19418 | switch (form) |
c906108c | 19419 | { |
c906108c | 19420 | case DW_FORM_ref_addr: |
ae411497 | 19421 | if (cu->header.version == 2) |
4568ecf9 | 19422 | DW_UNSND (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
ae411497 | 19423 | else |
4568ecf9 DE |
19424 | DW_UNSND (attr) = read_offset (abfd, info_ptr, |
19425 | &cu->header, &bytes_read); | |
ae411497 TT |
19426 | info_ptr += bytes_read; |
19427 | break; | |
36586728 TT |
19428 | case DW_FORM_GNU_ref_alt: |
19429 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
19430 | info_ptr += bytes_read; | |
19431 | break; | |
ae411497 | 19432 | case DW_FORM_addr: |
e7c27a73 | 19433 | DW_ADDR (attr) = read_address (abfd, info_ptr, cu, &bytes_read); |
3e29f34a | 19434 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 19435 | info_ptr += bytes_read; |
c906108c SS |
19436 | break; |
19437 | case DW_FORM_block2: | |
7b5a2f43 | 19438 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19439 | blk->size = read_2_bytes (abfd, info_ptr); |
19440 | info_ptr += 2; | |
19441 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19442 | info_ptr += blk->size; | |
19443 | DW_BLOCK (attr) = blk; | |
19444 | break; | |
19445 | case DW_FORM_block4: | |
7b5a2f43 | 19446 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19447 | blk->size = read_4_bytes (abfd, info_ptr); |
19448 | info_ptr += 4; | |
19449 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19450 | info_ptr += blk->size; | |
19451 | DW_BLOCK (attr) = blk; | |
19452 | break; | |
19453 | case DW_FORM_data2: | |
19454 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
19455 | info_ptr += 2; | |
19456 | break; | |
19457 | case DW_FORM_data4: | |
19458 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
19459 | info_ptr += 4; | |
19460 | break; | |
19461 | case DW_FORM_data8: | |
19462 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
19463 | info_ptr += 8; | |
19464 | break; | |
0224619f JK |
19465 | case DW_FORM_data16: |
19466 | blk = dwarf_alloc_block (cu); | |
19467 | blk->size = 16; | |
19468 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
19469 | info_ptr += 16; | |
19470 | DW_BLOCK (attr) = blk; | |
19471 | break; | |
2dc7f7b3 TT |
19472 | case DW_FORM_sec_offset: |
19473 | DW_UNSND (attr) = read_offset (abfd, info_ptr, &cu->header, &bytes_read); | |
19474 | info_ptr += bytes_read; | |
19475 | break; | |
c906108c | 19476 | case DW_FORM_string: |
9b1c24c8 | 19477 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 19478 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
19479 | info_ptr += bytes_read; |
19480 | break; | |
4bdf3d34 | 19481 | case DW_FORM_strp: |
36586728 TT |
19482 | if (!cu->per_cu->is_dwz) |
19483 | { | |
ed2dc618 SM |
19484 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
19485 | abfd, info_ptr, cu_header, | |
36586728 TT |
19486 | &bytes_read); |
19487 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19488 | info_ptr += bytes_read; | |
19489 | break; | |
19490 | } | |
19491 | /* FALLTHROUGH */ | |
43988095 JK |
19492 | case DW_FORM_line_strp: |
19493 | if (!cu->per_cu->is_dwz) | |
19494 | { | |
ed2dc618 SM |
19495 | DW_STRING (attr) = read_indirect_line_string (dwarf2_per_objfile, |
19496 | abfd, info_ptr, | |
43988095 JK |
19497 | cu_header, &bytes_read); |
19498 | DW_STRING_IS_CANONICAL (attr) = 0; | |
19499 | info_ptr += bytes_read; | |
19500 | break; | |
19501 | } | |
19502 | /* FALLTHROUGH */ | |
36586728 TT |
19503 | case DW_FORM_GNU_strp_alt: |
19504 | { | |
ed2dc618 | 19505 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19506 | LONGEST str_offset = read_offset (abfd, info_ptr, cu_header, |
19507 | &bytes_read); | |
19508 | ||
ed2dc618 SM |
19509 | DW_STRING (attr) = read_indirect_string_from_dwz (objfile, |
19510 | dwz, str_offset); | |
36586728 TT |
19511 | DW_STRING_IS_CANONICAL (attr) = 0; |
19512 | info_ptr += bytes_read; | |
19513 | } | |
4bdf3d34 | 19514 | break; |
2dc7f7b3 | 19515 | case DW_FORM_exprloc: |
c906108c | 19516 | case DW_FORM_block: |
7b5a2f43 | 19517 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19518 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19519 | info_ptr += bytes_read; | |
19520 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19521 | info_ptr += blk->size; | |
19522 | DW_BLOCK (attr) = blk; | |
19523 | break; | |
19524 | case DW_FORM_block1: | |
7b5a2f43 | 19525 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19526 | blk->size = read_1_byte (abfd, info_ptr); |
19527 | info_ptr += 1; | |
19528 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19529 | info_ptr += blk->size; | |
19530 | DW_BLOCK (attr) = blk; | |
19531 | break; | |
19532 | case DW_FORM_data1: | |
19533 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19534 | info_ptr += 1; | |
19535 | break; | |
19536 | case DW_FORM_flag: | |
19537 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
19538 | info_ptr += 1; | |
19539 | break; | |
2dc7f7b3 TT |
19540 | case DW_FORM_flag_present: |
19541 | DW_UNSND (attr) = 1; | |
19542 | break; | |
c906108c SS |
19543 | case DW_FORM_sdata: |
19544 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19545 | info_ptr += bytes_read; | |
19546 | break; | |
19547 | case DW_FORM_udata: | |
19548 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19549 | info_ptr += bytes_read; | |
19550 | break; | |
19551 | case DW_FORM_ref1: | |
9c541725 | 19552 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19553 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
19554 | info_ptr += 1; |
19555 | break; | |
19556 | case DW_FORM_ref2: | |
9c541725 | 19557 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19558 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19559 | info_ptr += 2; |
19560 | break; | |
19561 | case DW_FORM_ref4: | |
9c541725 | 19562 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19563 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19564 | info_ptr += 4; |
19565 | break; | |
613e1657 | 19566 | case DW_FORM_ref8: |
9c541725 | 19567 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19568 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
19569 | info_ptr += 8; |
19570 | break; | |
55f1336d | 19571 | case DW_FORM_ref_sig8: |
ac9ec31b | 19572 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
19573 | info_ptr += 8; |
19574 | break; | |
c906108c | 19575 | case DW_FORM_ref_udata: |
9c541725 | 19576 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 19577 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19578 | info_ptr += bytes_read; |
19579 | break; | |
c906108c | 19580 | case DW_FORM_indirect: |
a8329558 KW |
19581 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19582 | info_ptr += bytes_read; | |
43988095 JK |
19583 | if (form == DW_FORM_implicit_const) |
19584 | { | |
19585 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
19586 | info_ptr += bytes_read; | |
19587 | } | |
19588 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
19589 | info_ptr); | |
19590 | break; | |
19591 | case DW_FORM_implicit_const: | |
19592 | DW_SND (attr) = implicit_const; | |
a8329558 | 19593 | break; |
336d760d | 19594 | case DW_FORM_addrx: |
3019eac3 DE |
19595 | case DW_FORM_GNU_addr_index: |
19596 | if (reader->dwo_file == NULL) | |
19597 | { | |
19598 | /* For now flag a hard error. | |
19599 | Later we can turn this into a complaint. */ | |
19600 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19601 | dwarf_form_name (form), | |
19602 | bfd_get_filename (abfd)); | |
19603 | } | |
19604 | DW_ADDR (attr) = read_addr_index_from_leb128 (cu, info_ptr, &bytes_read); | |
19605 | info_ptr += bytes_read; | |
19606 | break; | |
cf532bd1 | 19607 | case DW_FORM_strx: |
15f18d14 AT |
19608 | case DW_FORM_strx1: |
19609 | case DW_FORM_strx2: | |
19610 | case DW_FORM_strx3: | |
19611 | case DW_FORM_strx4: | |
3019eac3 DE |
19612 | case DW_FORM_GNU_str_index: |
19613 | if (reader->dwo_file == NULL) | |
19614 | { | |
19615 | /* For now flag a hard error. | |
19616 | Later we can turn this into a complaint if warranted. */ | |
19617 | error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"), | |
19618 | dwarf_form_name (form), | |
19619 | bfd_get_filename (abfd)); | |
19620 | } | |
19621 | { | |
15f18d14 AT |
19622 | ULONGEST str_index; |
19623 | if (form == DW_FORM_strx1) | |
19624 | { | |
19625 | str_index = read_1_byte (abfd, info_ptr); | |
19626 | info_ptr += 1; | |
19627 | } | |
19628 | else if (form == DW_FORM_strx2) | |
19629 | { | |
19630 | str_index = read_2_bytes (abfd, info_ptr); | |
19631 | info_ptr += 2; | |
19632 | } | |
19633 | else if (form == DW_FORM_strx3) | |
19634 | { | |
19635 | str_index = read_3_bytes (abfd, info_ptr); | |
19636 | info_ptr += 3; | |
19637 | } | |
19638 | else if (form == DW_FORM_strx4) | |
19639 | { | |
19640 | str_index = read_4_bytes (abfd, info_ptr); | |
19641 | info_ptr += 4; | |
19642 | } | |
19643 | else | |
19644 | { | |
19645 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
19646 | info_ptr += bytes_read; | |
19647 | } | |
342587c4 | 19648 | DW_STRING (attr) = read_str_index (reader, str_index); |
3019eac3 | 19649 | DW_STRING_IS_CANONICAL (attr) = 0; |
3019eac3 DE |
19650 | } |
19651 | break; | |
c906108c | 19652 | default: |
8a3fe4f8 | 19653 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
19654 | dwarf_form_name (form), |
19655 | bfd_get_filename (abfd)); | |
c906108c | 19656 | } |
28e94949 | 19657 | |
36586728 | 19658 | /* Super hack. */ |
7771576e | 19659 | if (cu->per_cu->is_dwz && attr_form_is_ref (attr)) |
36586728 TT |
19660 | attr->form = DW_FORM_GNU_ref_alt; |
19661 | ||
28e94949 JB |
19662 | /* We have seen instances where the compiler tried to emit a byte |
19663 | size attribute of -1 which ended up being encoded as an unsigned | |
19664 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
19665 | an object of this size seems pretty unlikely so we can relatively | |
19666 | safely treat these cases as if the size attribute was invalid and | |
19667 | treat them as zero by default. */ | |
19668 | if (attr->name == DW_AT_byte_size | |
19669 | && form == DW_FORM_data4 | |
19670 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
19671 | { |
19672 | complaint | |
b98664d3 | 19673 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 19674 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
19675 | DW_UNSND (attr) = 0; |
19676 | } | |
28e94949 | 19677 | |
c906108c SS |
19678 | return info_ptr; |
19679 | } | |
19680 | ||
a8329558 KW |
19681 | /* Read an attribute described by an abbreviated attribute. */ |
19682 | ||
d521ce57 | 19683 | static const gdb_byte * |
dee91e82 DE |
19684 | read_attribute (const struct die_reader_specs *reader, |
19685 | struct attribute *attr, struct attr_abbrev *abbrev, | |
d521ce57 | 19686 | const gdb_byte *info_ptr) |
a8329558 KW |
19687 | { |
19688 | attr->name = abbrev->name; | |
43988095 JK |
19689 | return read_attribute_value (reader, attr, abbrev->form, |
19690 | abbrev->implicit_const, info_ptr); | |
a8329558 KW |
19691 | } |
19692 | ||
0963b4bd | 19693 | /* Read dwarf information from a buffer. */ |
c906108c SS |
19694 | |
19695 | static unsigned int | |
a1855c1d | 19696 | read_1_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19697 | { |
fe1b8b76 | 19698 | return bfd_get_8 (abfd, buf); |
c906108c SS |
19699 | } |
19700 | ||
19701 | static int | |
a1855c1d | 19702 | read_1_signed_byte (bfd *abfd, const gdb_byte *buf) |
c906108c | 19703 | { |
fe1b8b76 | 19704 | return bfd_get_signed_8 (abfd, buf); |
c906108c SS |
19705 | } |
19706 | ||
19707 | static unsigned int | |
a1855c1d | 19708 | read_2_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19709 | { |
fe1b8b76 | 19710 | return bfd_get_16 (abfd, buf); |
c906108c SS |
19711 | } |
19712 | ||
21ae7a4d | 19713 | static int |
a1855c1d | 19714 | read_2_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19715 | { |
19716 | return bfd_get_signed_16 (abfd, buf); | |
19717 | } | |
19718 | ||
15f18d14 AT |
19719 | static unsigned int |
19720 | read_3_bytes (bfd *abfd, const gdb_byte *buf) | |
19721 | { | |
19722 | unsigned int result = 0; | |
19723 | for (int i = 0; i < 3; ++i) | |
19724 | { | |
19725 | unsigned char byte = bfd_get_8 (abfd, buf); | |
19726 | buf++; | |
19727 | result |= ((unsigned int) byte << (i * 8)); | |
19728 | } | |
19729 | return result; | |
19730 | } | |
19731 | ||
c906108c | 19732 | static unsigned int |
a1855c1d | 19733 | read_4_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19734 | { |
fe1b8b76 | 19735 | return bfd_get_32 (abfd, buf); |
c906108c SS |
19736 | } |
19737 | ||
21ae7a4d | 19738 | static int |
a1855c1d | 19739 | read_4_signed_bytes (bfd *abfd, const gdb_byte *buf) |
21ae7a4d JK |
19740 | { |
19741 | return bfd_get_signed_32 (abfd, buf); | |
19742 | } | |
19743 | ||
93311388 | 19744 | static ULONGEST |
a1855c1d | 19745 | read_8_bytes (bfd *abfd, const gdb_byte *buf) |
c906108c | 19746 | { |
fe1b8b76 | 19747 | return bfd_get_64 (abfd, buf); |
c906108c SS |
19748 | } |
19749 | ||
19750 | static CORE_ADDR | |
d521ce57 | 19751 | read_address (bfd *abfd, const gdb_byte *buf, struct dwarf2_cu *cu, |
891d2f0b | 19752 | unsigned int *bytes_read) |
c906108c | 19753 | { |
e7c27a73 | 19754 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19755 | CORE_ADDR retval = 0; |
19756 | ||
107d2387 | 19757 | if (cu_header->signed_addr_p) |
c906108c | 19758 | { |
107d2387 AC |
19759 | switch (cu_header->addr_size) |
19760 | { | |
19761 | case 2: | |
fe1b8b76 | 19762 | retval = bfd_get_signed_16 (abfd, buf); |
107d2387 AC |
19763 | break; |
19764 | case 4: | |
fe1b8b76 | 19765 | retval = bfd_get_signed_32 (abfd, buf); |
107d2387 AC |
19766 | break; |
19767 | case 8: | |
fe1b8b76 | 19768 | retval = bfd_get_signed_64 (abfd, buf); |
107d2387 AC |
19769 | break; |
19770 | default: | |
8e65ff28 | 19771 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 19772 | _("read_address: bad switch, signed [in module %s]"), |
659b0389 | 19773 | bfd_get_filename (abfd)); |
107d2387 AC |
19774 | } |
19775 | } | |
19776 | else | |
19777 | { | |
19778 | switch (cu_header->addr_size) | |
19779 | { | |
19780 | case 2: | |
fe1b8b76 | 19781 | retval = bfd_get_16 (abfd, buf); |
107d2387 AC |
19782 | break; |
19783 | case 4: | |
fe1b8b76 | 19784 | retval = bfd_get_32 (abfd, buf); |
107d2387 AC |
19785 | break; |
19786 | case 8: | |
fe1b8b76 | 19787 | retval = bfd_get_64 (abfd, buf); |
107d2387 AC |
19788 | break; |
19789 | default: | |
8e65ff28 | 19790 | internal_error (__FILE__, __LINE__, |
a73c6dcd MS |
19791 | _("read_address: bad switch, " |
19792 | "unsigned [in module %s]"), | |
659b0389 | 19793 | bfd_get_filename (abfd)); |
107d2387 | 19794 | } |
c906108c | 19795 | } |
64367e0a | 19796 | |
107d2387 AC |
19797 | *bytes_read = cu_header->addr_size; |
19798 | return retval; | |
c906108c SS |
19799 | } |
19800 | ||
f7ef9339 | 19801 | /* Read the initial length from a section. The (draft) DWARF 3 |
613e1657 KB |
19802 | specification allows the initial length to take up either 4 bytes |
19803 | or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8 | |
19804 | bytes describe the length and all offsets will be 8 bytes in length | |
19805 | instead of 4. | |
19806 | ||
f7ef9339 KB |
19807 | An older, non-standard 64-bit format is also handled by this |
19808 | function. The older format in question stores the initial length | |
19809 | as an 8-byte quantity without an escape value. Lengths greater | |
19810 | than 2^32 aren't very common which means that the initial 4 bytes | |
19811 | is almost always zero. Since a length value of zero doesn't make | |
19812 | sense for the 32-bit format, this initial zero can be considered to | |
19813 | be an escape value which indicates the presence of the older 64-bit | |
19814 | format. As written, the code can't detect (old format) lengths | |
917c78fc MK |
19815 | greater than 4GB. If it becomes necessary to handle lengths |
19816 | somewhat larger than 4GB, we could allow other small values (such | |
19817 | as the non-sensical values of 1, 2, and 3) to also be used as | |
19818 | escape values indicating the presence of the old format. | |
f7ef9339 | 19819 | |
917c78fc MK |
19820 | The value returned via bytes_read should be used to increment the |
19821 | relevant pointer after calling read_initial_length(). | |
c764a876 | 19822 | |
613e1657 KB |
19823 | [ Note: read_initial_length() and read_offset() are based on the |
19824 | document entitled "DWARF Debugging Information Format", revision | |
f7ef9339 | 19825 | 3, draft 8, dated November 19, 2001. This document was obtained |
613e1657 KB |
19826 | from: |
19827 | ||
f7ef9339 | 19828 | http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf |
6e70227d | 19829 | |
613e1657 KB |
19830 | This document is only a draft and is subject to change. (So beware.) |
19831 | ||
f7ef9339 | 19832 | Details regarding the older, non-standard 64-bit format were |
917c78fc MK |
19833 | determined empirically by examining 64-bit ELF files produced by |
19834 | the SGI toolchain on an IRIX 6.5 machine. | |
f7ef9339 KB |
19835 | |
19836 | - Kevin, July 16, 2002 | |
613e1657 KB |
19837 | ] */ |
19838 | ||
19839 | static LONGEST | |
d521ce57 | 19840 | read_initial_length (bfd *abfd, const gdb_byte *buf, unsigned int *bytes_read) |
613e1657 | 19841 | { |
fe1b8b76 | 19842 | LONGEST length = bfd_get_32 (abfd, buf); |
613e1657 | 19843 | |
dd373385 | 19844 | if (length == 0xffffffff) |
613e1657 | 19845 | { |
fe1b8b76 | 19846 | length = bfd_get_64 (abfd, buf + 4); |
613e1657 | 19847 | *bytes_read = 12; |
613e1657 | 19848 | } |
dd373385 | 19849 | else if (length == 0) |
f7ef9339 | 19850 | { |
dd373385 | 19851 | /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */ |
fe1b8b76 | 19852 | length = bfd_get_64 (abfd, buf); |
f7ef9339 | 19853 | *bytes_read = 8; |
f7ef9339 | 19854 | } |
613e1657 KB |
19855 | else |
19856 | { | |
19857 | *bytes_read = 4; | |
613e1657 KB |
19858 | } |
19859 | ||
c764a876 DE |
19860 | return length; |
19861 | } | |
dd373385 | 19862 | |
c764a876 DE |
19863 | /* Cover function for read_initial_length. |
19864 | Returns the length of the object at BUF, and stores the size of the | |
19865 | initial length in *BYTES_READ and stores the size that offsets will be in | |
19866 | *OFFSET_SIZE. | |
19867 | If the initial length size is not equivalent to that specified in | |
19868 | CU_HEADER then issue a complaint. | |
19869 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 19870 | |
c764a876 | 19871 | static LONGEST |
d521ce57 | 19872 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
19873 | const struct comp_unit_head *cu_header, |
19874 | unsigned int *bytes_read, | |
19875 | unsigned int *offset_size) | |
19876 | { | |
19877 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
19878 | ||
19879 | gdb_assert (cu_header->initial_length_size == 4 | |
19880 | || cu_header->initial_length_size == 8 | |
19881 | || cu_header->initial_length_size == 12); | |
19882 | ||
19883 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 19884 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 19885 | |
c764a876 | 19886 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 19887 | return length; |
613e1657 KB |
19888 | } |
19889 | ||
19890 | /* Read an offset from the data stream. The size of the offset is | |
917c78fc | 19891 | given by cu_header->offset_size. */ |
613e1657 KB |
19892 | |
19893 | static LONGEST | |
d521ce57 TT |
19894 | read_offset (bfd *abfd, const gdb_byte *buf, |
19895 | const struct comp_unit_head *cu_header, | |
891d2f0b | 19896 | unsigned int *bytes_read) |
c764a876 DE |
19897 | { |
19898 | LONGEST offset = read_offset_1 (abfd, buf, cu_header->offset_size); | |
9a619af0 | 19899 | |
c764a876 DE |
19900 | *bytes_read = cu_header->offset_size; |
19901 | return offset; | |
19902 | } | |
19903 | ||
19904 | /* Read an offset from the data stream. */ | |
19905 | ||
19906 | static LONGEST | |
d521ce57 | 19907 | read_offset_1 (bfd *abfd, const gdb_byte *buf, unsigned int offset_size) |
613e1657 KB |
19908 | { |
19909 | LONGEST retval = 0; | |
19910 | ||
c764a876 | 19911 | switch (offset_size) |
613e1657 KB |
19912 | { |
19913 | case 4: | |
fe1b8b76 | 19914 | retval = bfd_get_32 (abfd, buf); |
613e1657 KB |
19915 | break; |
19916 | case 8: | |
fe1b8b76 | 19917 | retval = bfd_get_64 (abfd, buf); |
613e1657 KB |
19918 | break; |
19919 | default: | |
8e65ff28 | 19920 | internal_error (__FILE__, __LINE__, |
c764a876 | 19921 | _("read_offset_1: bad switch [in module %s]"), |
659b0389 | 19922 | bfd_get_filename (abfd)); |
613e1657 KB |
19923 | } |
19924 | ||
917c78fc | 19925 | return retval; |
613e1657 KB |
19926 | } |
19927 | ||
d521ce57 TT |
19928 | static const gdb_byte * |
19929 | read_n_bytes (bfd *abfd, const gdb_byte *buf, unsigned int size) | |
c906108c SS |
19930 | { |
19931 | /* If the size of a host char is 8 bits, we can return a pointer | |
19932 | to the buffer, otherwise we have to copy the data to a buffer | |
19933 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19934 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c | 19935 | return buf; |
c906108c SS |
19936 | } |
19937 | ||
d521ce57 TT |
19938 | static const char * |
19939 | read_direct_string (bfd *abfd, const gdb_byte *buf, | |
19940 | unsigned int *bytes_read_ptr) | |
c906108c SS |
19941 | { |
19942 | /* If the size of a host char is 8 bits, we can return a pointer | |
19943 | to the string, otherwise we have to copy the string to a buffer | |
19944 | allocated on the temporary obstack. */ | |
4bdf3d34 | 19945 | gdb_assert (HOST_CHAR_BIT == 8); |
c906108c SS |
19946 | if (*buf == '\0') |
19947 | { | |
19948 | *bytes_read_ptr = 1; | |
19949 | return NULL; | |
19950 | } | |
d521ce57 TT |
19951 | *bytes_read_ptr = strlen ((const char *) buf) + 1; |
19952 | return (const char *) buf; | |
4bdf3d34 JJ |
19953 | } |
19954 | ||
43988095 JK |
19955 | /* Return pointer to string at section SECT offset STR_OFFSET with error |
19956 | reporting strings FORM_NAME and SECT_NAME. */ | |
19957 | ||
d521ce57 | 19958 | static const char * |
ed2dc618 SM |
19959 | read_indirect_string_at_offset_from (struct objfile *objfile, |
19960 | bfd *abfd, LONGEST str_offset, | |
43988095 JK |
19961 | struct dwarf2_section_info *sect, |
19962 | const char *form_name, | |
19963 | const char *sect_name) | |
19964 | { | |
ed2dc618 | 19965 | dwarf2_read_section (objfile, sect); |
43988095 JK |
19966 | if (sect->buffer == NULL) |
19967 | error (_("%s used without %s section [in module %s]"), | |
19968 | form_name, sect_name, bfd_get_filename (abfd)); | |
19969 | if (str_offset >= sect->size) | |
19970 | error (_("%s pointing outside of %s section [in module %s]"), | |
19971 | form_name, sect_name, bfd_get_filename (abfd)); | |
4bdf3d34 | 19972 | gdb_assert (HOST_CHAR_BIT == 8); |
43988095 | 19973 | if (sect->buffer[str_offset] == '\0') |
4bdf3d34 | 19974 | return NULL; |
43988095 JK |
19975 | return (const char *) (sect->buffer + str_offset); |
19976 | } | |
19977 | ||
19978 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ | |
19979 | ||
19980 | static const char * | |
ed2dc618 SM |
19981 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19982 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19983 | { |
ed2dc618 SM |
19984 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19985 | abfd, str_offset, | |
43988095 JK |
19986 | &dwarf2_per_objfile->str, |
19987 | "DW_FORM_strp", ".debug_str"); | |
19988 | } | |
19989 | ||
19990 | /* Return pointer to string at .debug_line_str offset STR_OFFSET. */ | |
19991 | ||
19992 | static const char * | |
ed2dc618 SM |
19993 | read_indirect_line_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19994 | bfd *abfd, LONGEST str_offset) | |
43988095 | 19995 | { |
ed2dc618 SM |
19996 | return read_indirect_string_at_offset_from (dwarf2_per_objfile->objfile, |
19997 | abfd, str_offset, | |
43988095 JK |
19998 | &dwarf2_per_objfile->line_str, |
19999 | "DW_FORM_line_strp", | |
20000 | ".debug_line_str"); | |
c906108c SS |
20001 | } |
20002 | ||
36586728 TT |
20003 | /* Read a string at offset STR_OFFSET in the .debug_str section from |
20004 | the .dwz file DWZ. Throw an error if the offset is too large. If | |
20005 | the string consists of a single NUL byte, return NULL; otherwise | |
20006 | return a pointer to the string. */ | |
20007 | ||
d521ce57 | 20008 | static const char * |
ed2dc618 SM |
20009 | read_indirect_string_from_dwz (struct objfile *objfile, struct dwz_file *dwz, |
20010 | LONGEST str_offset) | |
36586728 | 20011 | { |
ed2dc618 | 20012 | dwarf2_read_section (objfile, &dwz->str); |
36586728 TT |
20013 | |
20014 | if (dwz->str.buffer == NULL) | |
20015 | error (_("DW_FORM_GNU_strp_alt used without .debug_str " | |
20016 | "section [in module %s]"), | |
00f93c44 | 20017 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
20018 | if (str_offset >= dwz->str.size) |
20019 | error (_("DW_FORM_GNU_strp_alt pointing outside of " | |
20020 | ".debug_str section [in module %s]"), | |
00f93c44 | 20021 | bfd_get_filename (dwz->dwz_bfd.get ())); |
36586728 TT |
20022 | gdb_assert (HOST_CHAR_BIT == 8); |
20023 | if (dwz->str.buffer[str_offset] == '\0') | |
20024 | return NULL; | |
d521ce57 | 20025 | return (const char *) (dwz->str.buffer + str_offset); |
36586728 TT |
20026 | } |
20027 | ||
43988095 JK |
20028 | /* Return pointer to string at .debug_str offset as read from BUF. |
20029 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
20030 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
20031 | ||
d521ce57 | 20032 | static const char * |
ed2dc618 SM |
20033 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
20034 | const gdb_byte *buf, | |
cf2c3c16 TT |
20035 | const struct comp_unit_head *cu_header, |
20036 | unsigned int *bytes_read_ptr) | |
20037 | { | |
20038 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
20039 | ||
ed2dc618 | 20040 | return read_indirect_string_at_offset (dwarf2_per_objfile, abfd, str_offset); |
cf2c3c16 TT |
20041 | } |
20042 | ||
43988095 JK |
20043 | /* Return pointer to string at .debug_line_str offset as read from BUF. |
20044 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
20045 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
20046 | ||
20047 | static const char * | |
ed2dc618 SM |
20048 | read_indirect_line_string (struct dwarf2_per_objfile *dwarf2_per_objfile, |
20049 | bfd *abfd, const gdb_byte *buf, | |
43988095 JK |
20050 | const struct comp_unit_head *cu_header, |
20051 | unsigned int *bytes_read_ptr) | |
20052 | { | |
20053 | LONGEST str_offset = read_offset (abfd, buf, cu_header, bytes_read_ptr); | |
20054 | ||
ed2dc618 SM |
20055 | return read_indirect_line_string_at_offset (dwarf2_per_objfile, abfd, |
20056 | str_offset); | |
43988095 JK |
20057 | } |
20058 | ||
20059 | ULONGEST | |
d521ce57 | 20060 | read_unsigned_leb128 (bfd *abfd, const gdb_byte *buf, |
43988095 | 20061 | unsigned int *bytes_read_ptr) |
c906108c | 20062 | { |
12df843f | 20063 | ULONGEST result; |
ce5d95e1 | 20064 | unsigned int num_read; |
870f88f7 | 20065 | int shift; |
c906108c SS |
20066 | unsigned char byte; |
20067 | ||
20068 | result = 0; | |
20069 | shift = 0; | |
20070 | num_read = 0; | |
c906108c SS |
20071 | while (1) |
20072 | { | |
fe1b8b76 | 20073 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
20074 | buf++; |
20075 | num_read++; | |
12df843f | 20076 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
20077 | if ((byte & 128) == 0) |
20078 | { | |
20079 | break; | |
20080 | } | |
20081 | shift += 7; | |
20082 | } | |
20083 | *bytes_read_ptr = num_read; | |
20084 | return result; | |
20085 | } | |
20086 | ||
12df843f | 20087 | static LONGEST |
d521ce57 TT |
20088 | read_signed_leb128 (bfd *abfd, const gdb_byte *buf, |
20089 | unsigned int *bytes_read_ptr) | |
c906108c | 20090 | { |
4dd1b460 | 20091 | ULONGEST result; |
870f88f7 | 20092 | int shift, num_read; |
c906108c SS |
20093 | unsigned char byte; |
20094 | ||
20095 | result = 0; | |
20096 | shift = 0; | |
c906108c | 20097 | num_read = 0; |
c906108c SS |
20098 | while (1) |
20099 | { | |
fe1b8b76 | 20100 | byte = bfd_get_8 (abfd, buf); |
c906108c SS |
20101 | buf++; |
20102 | num_read++; | |
4dd1b460 | 20103 | result |= ((ULONGEST) (byte & 127) << shift); |
c906108c SS |
20104 | shift += 7; |
20105 | if ((byte & 128) == 0) | |
20106 | { | |
20107 | break; | |
20108 | } | |
20109 | } | |
77e0b926 | 20110 | if ((shift < 8 * sizeof (result)) && (byte & 0x40)) |
4dd1b460 | 20111 | result |= -(((ULONGEST) 1) << shift); |
c906108c SS |
20112 | *bytes_read_ptr = num_read; |
20113 | return result; | |
20114 | } | |
20115 | ||
3019eac3 DE |
20116 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
20117 | ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero. | |
20118 | ADDR_SIZE is the size of addresses from the CU header. */ | |
20119 | ||
20120 | static CORE_ADDR | |
ed2dc618 SM |
20121 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
20122 | unsigned int addr_index, ULONGEST addr_base, int addr_size) | |
3019eac3 DE |
20123 | { |
20124 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
20125 | bfd *abfd = objfile->obfd; | |
20126 | const gdb_byte *info_ptr; | |
20127 | ||
20128 | dwarf2_read_section (objfile, &dwarf2_per_objfile->addr); | |
20129 | if (dwarf2_per_objfile->addr.buffer == NULL) | |
20130 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 20131 | objfile_name (objfile)); |
3019eac3 DE |
20132 | if (addr_base + addr_index * addr_size >= dwarf2_per_objfile->addr.size) |
20133 | error (_("DW_FORM_addr_index pointing outside of " | |
20134 | ".debug_addr section [in module %s]"), | |
4262abfb | 20135 | objfile_name (objfile)); |
3019eac3 DE |
20136 | info_ptr = (dwarf2_per_objfile->addr.buffer |
20137 | + addr_base + addr_index * addr_size); | |
20138 | if (addr_size == 4) | |
20139 | return bfd_get_32 (abfd, info_ptr); | |
20140 | else | |
20141 | return bfd_get_64 (abfd, info_ptr); | |
20142 | } | |
20143 | ||
20144 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
20145 | ||
20146 | static CORE_ADDR | |
20147 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
20148 | { | |
518817b3 SM |
20149 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
20150 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
20151 | } |
20152 | ||
20153 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
20154 | ||
20155 | static CORE_ADDR | |
d521ce57 | 20156 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
20157 | unsigned int *bytes_read) |
20158 | { | |
518817b3 | 20159 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
20160 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
20161 | ||
20162 | return read_addr_index (cu, addr_index); | |
20163 | } | |
20164 | ||
20165 | /* Data structure to pass results from dwarf2_read_addr_index_reader | |
20166 | back to dwarf2_read_addr_index. */ | |
20167 | ||
20168 | struct dwarf2_read_addr_index_data | |
20169 | { | |
20170 | ULONGEST addr_base; | |
20171 | int addr_size; | |
20172 | }; | |
20173 | ||
20174 | /* die_reader_func for dwarf2_read_addr_index. */ | |
20175 | ||
20176 | static void | |
20177 | dwarf2_read_addr_index_reader (const struct die_reader_specs *reader, | |
d521ce57 | 20178 | const gdb_byte *info_ptr, |
3019eac3 DE |
20179 | struct die_info *comp_unit_die, |
20180 | int has_children, | |
20181 | void *data) | |
20182 | { | |
20183 | struct dwarf2_cu *cu = reader->cu; | |
20184 | struct dwarf2_read_addr_index_data *aidata = | |
20185 | (struct dwarf2_read_addr_index_data *) data; | |
20186 | ||
20187 | aidata->addr_base = cu->addr_base; | |
20188 | aidata->addr_size = cu->header.addr_size; | |
20189 | } | |
20190 | ||
20191 | /* Given an index in .debug_addr, fetch the value. | |
20192 | NOTE: This can be called during dwarf expression evaluation, | |
20193 | long after the debug information has been read, and thus per_cu->cu | |
20194 | may no longer exist. */ | |
20195 | ||
20196 | CORE_ADDR | |
20197 | dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, | |
20198 | unsigned int addr_index) | |
20199 | { | |
ed2dc618 | 20200 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 DE |
20201 | struct dwarf2_cu *cu = per_cu->cu; |
20202 | ULONGEST addr_base; | |
20203 | int addr_size; | |
20204 | ||
3019eac3 DE |
20205 | /* We need addr_base and addr_size. |
20206 | If we don't have PER_CU->cu, we have to get it. | |
20207 | Nasty, but the alternative is storing the needed info in PER_CU, | |
20208 | which at this point doesn't seem justified: it's not clear how frequently | |
20209 | it would get used and it would increase the size of every PER_CU. | |
20210 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
20211 | so we're not in uncharted territory here. | |
20212 | Alas we need to be a bit more complicated as addr_base is contained | |
20213 | in the DIE. | |
20214 | ||
20215 | We don't need to read the entire CU(/TU). | |
20216 | We just need the header and top level die. | |
a1b64ce1 | 20217 | |
3019eac3 | 20218 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 20219 | For now we skip this optimization. */ |
3019eac3 DE |
20220 | |
20221 | if (cu != NULL) | |
20222 | { | |
20223 | addr_base = cu->addr_base; | |
20224 | addr_size = cu->header.addr_size; | |
20225 | } | |
20226 | else | |
20227 | { | |
20228 | struct dwarf2_read_addr_index_data aidata; | |
20229 | ||
a1b64ce1 DE |
20230 | /* Note: We can't use init_cutu_and_read_dies_simple here, |
20231 | we need addr_base. */ | |
58f0c718 | 20232 | init_cutu_and_read_dies (per_cu, NULL, 0, 0, false, |
a1b64ce1 | 20233 | dwarf2_read_addr_index_reader, &aidata); |
3019eac3 DE |
20234 | addr_base = aidata.addr_base; |
20235 | addr_size = aidata.addr_size; | |
20236 | } | |
20237 | ||
ed2dc618 SM |
20238 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
20239 | addr_size); | |
3019eac3 DE |
20240 | } |
20241 | ||
cf532bd1 | 20242 | /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string. |
57d63ce2 | 20243 | This is only used by the Fission support. */ |
3019eac3 | 20244 | |
d521ce57 | 20245 | static const char * |
342587c4 | 20246 | read_str_index (const struct die_reader_specs *reader, ULONGEST str_index) |
3019eac3 | 20247 | { |
ed2dc618 | 20248 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
20249 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20250 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 20251 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 20252 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 20253 | bfd *abfd = objfile->obfd; |
73869dc2 DE |
20254 | struct dwarf2_section_info *str_section = &reader->dwo_file->sections.str; |
20255 | struct dwarf2_section_info *str_offsets_section = | |
20256 | &reader->dwo_file->sections.str_offsets; | |
d521ce57 | 20257 | const gdb_byte *info_ptr; |
3019eac3 | 20258 | ULONGEST str_offset; |
cf532bd1 | 20259 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 20260 | |
73869dc2 DE |
20261 | dwarf2_read_section (objfile, str_section); |
20262 | dwarf2_read_section (objfile, str_offsets_section); | |
20263 | if (str_section->buffer == NULL) | |
57d63ce2 | 20264 | error (_("%s used without .debug_str.dwo section" |
9d8780f0 SM |
20265 | " in CU at offset %s [in module %s]"), |
20266 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20267 | if (str_offsets_section->buffer == NULL) |
57d63ce2 | 20268 | error (_("%s used without .debug_str_offsets.dwo section" |
9d8780f0 SM |
20269 | " in CU at offset %s [in module %s]"), |
20270 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20271 | if (str_index * cu->header.offset_size >= str_offsets_section->size) |
57d63ce2 | 20272 | error (_("%s pointing outside of .debug_str_offsets.dwo" |
9d8780f0 SM |
20273 | " section in CU at offset %s [in module %s]"), |
20274 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20275 | info_ptr = (str_offsets_section->buffer |
3019eac3 DE |
20276 | + str_index * cu->header.offset_size); |
20277 | if (cu->header.offset_size == 4) | |
20278 | str_offset = bfd_get_32 (abfd, info_ptr); | |
20279 | else | |
20280 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 20281 | if (str_offset >= str_section->size) |
57d63ce2 | 20282 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
20283 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
20284 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20285 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
20286 | } |
20287 | ||
3019eac3 DE |
20288 | /* Return the length of an LEB128 number in BUF. */ |
20289 | ||
20290 | static int | |
20291 | leb128_size (const gdb_byte *buf) | |
20292 | { | |
20293 | const gdb_byte *begin = buf; | |
20294 | gdb_byte byte; | |
20295 | ||
20296 | while (1) | |
20297 | { | |
20298 | byte = *buf++; | |
20299 | if ((byte & 128) == 0) | |
20300 | return buf - begin; | |
20301 | } | |
20302 | } | |
20303 | ||
c906108c | 20304 | static void |
e142c38c | 20305 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
20306 | { |
20307 | switch (lang) | |
20308 | { | |
20309 | case DW_LANG_C89: | |
76bee0cc | 20310 | case DW_LANG_C99: |
0cfd832f | 20311 | case DW_LANG_C11: |
c906108c | 20312 | case DW_LANG_C: |
d1be3247 | 20313 | case DW_LANG_UPC: |
e142c38c | 20314 | cu->language = language_c; |
c906108c | 20315 | break; |
9c37b5ae | 20316 | case DW_LANG_Java: |
c906108c | 20317 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
20318 | case DW_LANG_C_plus_plus_11: |
20319 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 20320 | cu->language = language_cplus; |
c906108c | 20321 | break; |
6aecb9c2 JB |
20322 | case DW_LANG_D: |
20323 | cu->language = language_d; | |
20324 | break; | |
c906108c SS |
20325 | case DW_LANG_Fortran77: |
20326 | case DW_LANG_Fortran90: | |
b21b22e0 | 20327 | case DW_LANG_Fortran95: |
f7de9aab MW |
20328 | case DW_LANG_Fortran03: |
20329 | case DW_LANG_Fortran08: | |
e142c38c | 20330 | cu->language = language_fortran; |
c906108c | 20331 | break; |
a766d390 DE |
20332 | case DW_LANG_Go: |
20333 | cu->language = language_go; | |
20334 | break; | |
c906108c | 20335 | case DW_LANG_Mips_Assembler: |
e142c38c | 20336 | cu->language = language_asm; |
c906108c SS |
20337 | break; |
20338 | case DW_LANG_Ada83: | |
8aaf0b47 | 20339 | case DW_LANG_Ada95: |
bc5f45f8 JB |
20340 | cu->language = language_ada; |
20341 | break; | |
72019c9c GM |
20342 | case DW_LANG_Modula2: |
20343 | cu->language = language_m2; | |
20344 | break; | |
fe8e67fd PM |
20345 | case DW_LANG_Pascal83: |
20346 | cu->language = language_pascal; | |
20347 | break; | |
22566fbd DJ |
20348 | case DW_LANG_ObjC: |
20349 | cu->language = language_objc; | |
20350 | break; | |
c44af4eb TT |
20351 | case DW_LANG_Rust: |
20352 | case DW_LANG_Rust_old: | |
20353 | cu->language = language_rust; | |
20354 | break; | |
c906108c SS |
20355 | case DW_LANG_Cobol74: |
20356 | case DW_LANG_Cobol85: | |
c906108c | 20357 | default: |
e142c38c | 20358 | cu->language = language_minimal; |
c906108c SS |
20359 | break; |
20360 | } | |
e142c38c | 20361 | cu->language_defn = language_def (cu->language); |
c906108c SS |
20362 | } |
20363 | ||
20364 | /* Return the named attribute or NULL if not there. */ | |
20365 | ||
20366 | static struct attribute * | |
e142c38c | 20367 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 20368 | { |
a48e046c | 20369 | for (;;) |
c906108c | 20370 | { |
a48e046c TT |
20371 | unsigned int i; |
20372 | struct attribute *spec = NULL; | |
20373 | ||
20374 | for (i = 0; i < die->num_attrs; ++i) | |
20375 | { | |
20376 | if (die->attrs[i].name == name) | |
20377 | return &die->attrs[i]; | |
20378 | if (die->attrs[i].name == DW_AT_specification | |
20379 | || die->attrs[i].name == DW_AT_abstract_origin) | |
20380 | spec = &die->attrs[i]; | |
20381 | } | |
20382 | ||
20383 | if (!spec) | |
20384 | break; | |
c906108c | 20385 | |
f2f0e013 | 20386 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 20387 | } |
c5aa993b | 20388 | |
c906108c SS |
20389 | return NULL; |
20390 | } | |
20391 | ||
348e048f DE |
20392 | /* Return the named attribute or NULL if not there, |
20393 | but do not follow DW_AT_specification, etc. | |
20394 | This is for use in contexts where we're reading .debug_types dies. | |
20395 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
20396 | back up the chain, and we want to go down. */ | |
20397 | ||
20398 | static struct attribute * | |
45e58e77 | 20399 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
20400 | { |
20401 | unsigned int i; | |
20402 | ||
20403 | for (i = 0; i < die->num_attrs; ++i) | |
20404 | if (die->attrs[i].name == name) | |
20405 | return &die->attrs[i]; | |
20406 | ||
20407 | return NULL; | |
20408 | } | |
20409 | ||
7d45c7c3 KB |
20410 | /* Return the string associated with a string-typed attribute, or NULL if it |
20411 | is either not found or is of an incorrect type. */ | |
20412 | ||
20413 | static const char * | |
20414 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
20415 | { | |
20416 | struct attribute *attr; | |
20417 | const char *str = NULL; | |
20418 | ||
20419 | attr = dwarf2_attr (die, name, cu); | |
20420 | ||
20421 | if (attr != NULL) | |
20422 | { | |
43988095 | 20423 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 | 20424 | || attr->form == DW_FORM_string |
cf532bd1 | 20425 | || attr->form == DW_FORM_strx |
8fe0f950 AT |
20426 | || attr->form == DW_FORM_strx1 |
20427 | || attr->form == DW_FORM_strx2 | |
20428 | || attr->form == DW_FORM_strx3 | |
20429 | || attr->form == DW_FORM_strx4 | |
b3340438 | 20430 | || attr->form == DW_FORM_GNU_str_index |
16eb6b2d | 20431 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
20432 | str = DW_STRING (attr); |
20433 | else | |
b98664d3 | 20434 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
20435 | "DIE at %s in module %s"), |
20436 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 20437 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
20438 | } |
20439 | ||
20440 | return str; | |
20441 | } | |
20442 | ||
a084a2a6 | 20443 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 20444 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
20445 | static const char * |
20446 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
20447 | { | |
20448 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
20449 | if (dwo_name == nullptr) | |
20450 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
20451 | return dwo_name; | |
20452 | } | |
20453 | ||
05cf31d1 JB |
20454 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
20455 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 20456 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
20457 | |
20458 | static int | |
20459 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
20460 | { | |
20461 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
20462 | ||
20463 | return (attr && DW_UNSND (attr)); | |
20464 | } | |
20465 | ||
3ca72b44 | 20466 | static int |
e142c38c | 20467 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 20468 | { |
05cf31d1 JB |
20469 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
20470 | which value is non-zero. However, we have to be careful with | |
20471 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
20472 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
20473 | end up accidently finding a declaration attribute that belongs | |
20474 | to a different DIE referenced by the specification attribute, | |
20475 | even though the given DIE does not have a declaration attribute. */ | |
20476 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
20477 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
20478 | } |
20479 | ||
63d06c5c | 20480 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 20481 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
20482 | containing the return value on output. If there is no |
20483 | specification, but there is an abstract origin, that is | |
20484 | returned. */ | |
63d06c5c DC |
20485 | |
20486 | static struct die_info * | |
f2f0e013 | 20487 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 20488 | { |
f2f0e013 DJ |
20489 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
20490 | *spec_cu); | |
63d06c5c | 20491 | |
edb3359d DJ |
20492 | if (spec_attr == NULL) |
20493 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
20494 | ||
63d06c5c DC |
20495 | if (spec_attr == NULL) |
20496 | return NULL; | |
20497 | else | |
f2f0e013 | 20498 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 20499 | } |
c906108c | 20500 | |
527f3840 JK |
20501 | /* Stub for free_line_header to match void * callback types. */ |
20502 | ||
20503 | static void | |
20504 | free_line_header_voidp (void *arg) | |
20505 | { | |
9a3c8263 | 20506 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 20507 | |
fff8551c | 20508 | delete lh; |
527f3840 JK |
20509 | } |
20510 | ||
fff8551c PA |
20511 | void |
20512 | line_header::add_include_dir (const char *include_dir) | |
c906108c | 20513 | { |
27e0867f | 20514 | if (dwarf_line_debug >= 2) |
7ba99d21 AT |
20515 | { |
20516 | size_t new_size; | |
20517 | if (version >= 5) | |
20518 | new_size = m_include_dirs.size (); | |
20519 | else | |
20520 | new_size = m_include_dirs.size () + 1; | |
20521 | fprintf_unfiltered (gdb_stdlog, "Adding dir %zu: %s\n", | |
20522 | new_size, include_dir); | |
20523 | } | |
20524 | m_include_dirs.push_back (include_dir); | |
debd256d | 20525 | } |
6e70227d | 20526 | |
fff8551c PA |
20527 | void |
20528 | line_header::add_file_name (const char *name, | |
ecfb656c | 20529 | dir_index d_index, |
fff8551c PA |
20530 | unsigned int mod_time, |
20531 | unsigned int length) | |
debd256d | 20532 | { |
27e0867f | 20533 | if (dwarf_line_debug >= 2) |
7ba99d21 AT |
20534 | { |
20535 | size_t new_size; | |
20536 | if (version >= 5) | |
20537 | new_size = file_names_size (); | |
20538 | else | |
20539 | new_size = file_names_size () + 1; | |
20540 | fprintf_unfiltered (gdb_stdlog, "Adding file %zu: %s\n", | |
20541 | new_size, name); | |
20542 | } | |
20543 | m_file_names.emplace_back (name, d_index, mod_time, length); | |
debd256d | 20544 | } |
6e70227d | 20545 | |
83769d0b | 20546 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
20547 | |
20548 | static struct dwarf2_section_info * | |
20549 | get_debug_line_section (struct dwarf2_cu *cu) | |
20550 | { | |
20551 | struct dwarf2_section_info *section; | |
518817b3 SM |
20552 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20553 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
20554 | |
20555 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
20556 | DWO file. */ | |
20557 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
20558 | section = &cu->dwo_unit->dwo_file->sections.line; | |
20559 | else if (cu->per_cu->is_dwz) | |
20560 | { | |
ed2dc618 | 20561 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
20562 | |
20563 | section = &dwz->line; | |
20564 | } | |
20565 | else | |
20566 | section = &dwarf2_per_objfile->line; | |
20567 | ||
20568 | return section; | |
20569 | } | |
20570 | ||
43988095 JK |
20571 | /* Read directory or file name entry format, starting with byte of |
20572 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
20573 | entries count and the entries themselves in the described entry | |
20574 | format. */ | |
20575 | ||
20576 | static void | |
ed2dc618 SM |
20577 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
20578 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
20579 | struct line_header *lh, |
20580 | const struct comp_unit_head *cu_header, | |
20581 | void (*callback) (struct line_header *lh, | |
20582 | const char *name, | |
ecfb656c | 20583 | dir_index d_index, |
43988095 JK |
20584 | unsigned int mod_time, |
20585 | unsigned int length)) | |
20586 | { | |
20587 | gdb_byte format_count, formati; | |
20588 | ULONGEST data_count, datai; | |
20589 | const gdb_byte *buf = *bufp; | |
20590 | const gdb_byte *format_header_data; | |
43988095 JK |
20591 | unsigned int bytes_read; |
20592 | ||
20593 | format_count = read_1_byte (abfd, buf); | |
20594 | buf += 1; | |
20595 | format_header_data = buf; | |
20596 | for (formati = 0; formati < format_count; formati++) | |
20597 | { | |
20598 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20599 | buf += bytes_read; | |
20600 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20601 | buf += bytes_read; | |
20602 | } | |
20603 | ||
20604 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
20605 | buf += bytes_read; | |
20606 | for (datai = 0; datai < data_count; datai++) | |
20607 | { | |
20608 | const gdb_byte *format = format_header_data; | |
20609 | struct file_entry fe; | |
20610 | ||
43988095 JK |
20611 | for (formati = 0; formati < format_count; formati++) |
20612 | { | |
ecfb656c | 20613 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 20614 | format += bytes_read; |
43988095 | 20615 | |
ecfb656c | 20616 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 20617 | format += bytes_read; |
ecfb656c PA |
20618 | |
20619 | gdb::optional<const char *> string; | |
20620 | gdb::optional<unsigned int> uint; | |
20621 | ||
43988095 JK |
20622 | switch (form) |
20623 | { | |
20624 | case DW_FORM_string: | |
ecfb656c | 20625 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
20626 | buf += bytes_read; |
20627 | break; | |
20628 | ||
20629 | case DW_FORM_line_strp: | |
ed2dc618 SM |
20630 | string.emplace (read_indirect_line_string (dwarf2_per_objfile, |
20631 | abfd, buf, | |
ecfb656c PA |
20632 | cu_header, |
20633 | &bytes_read)); | |
43988095 JK |
20634 | buf += bytes_read; |
20635 | break; | |
20636 | ||
20637 | case DW_FORM_data1: | |
ecfb656c | 20638 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
20639 | buf += 1; |
20640 | break; | |
20641 | ||
20642 | case DW_FORM_data2: | |
ecfb656c | 20643 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
20644 | buf += 2; |
20645 | break; | |
20646 | ||
20647 | case DW_FORM_data4: | |
ecfb656c | 20648 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
20649 | buf += 4; |
20650 | break; | |
20651 | ||
20652 | case DW_FORM_data8: | |
ecfb656c | 20653 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
20654 | buf += 8; |
20655 | break; | |
20656 | ||
7ba99d21 AT |
20657 | case DW_FORM_data16: |
20658 | /* This is used for MD5, but file_entry does not record MD5s. */ | |
20659 | buf += 16; | |
20660 | break; | |
20661 | ||
43988095 | 20662 | case DW_FORM_udata: |
ecfb656c | 20663 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
20664 | buf += bytes_read; |
20665 | break; | |
20666 | ||
20667 | case DW_FORM_block: | |
20668 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
20669 | current GDB. */ | |
20670 | break; | |
20671 | } | |
ecfb656c PA |
20672 | |
20673 | switch (content_type) | |
20674 | { | |
20675 | case DW_LNCT_path: | |
20676 | if (string.has_value ()) | |
20677 | fe.name = *string; | |
20678 | break; | |
20679 | case DW_LNCT_directory_index: | |
20680 | if (uint.has_value ()) | |
20681 | fe.d_index = (dir_index) *uint; | |
20682 | break; | |
20683 | case DW_LNCT_timestamp: | |
20684 | if (uint.has_value ()) | |
20685 | fe.mod_time = *uint; | |
20686 | break; | |
20687 | case DW_LNCT_size: | |
20688 | if (uint.has_value ()) | |
20689 | fe.length = *uint; | |
20690 | break; | |
20691 | case DW_LNCT_MD5: | |
20692 | break; | |
20693 | default: | |
b98664d3 | 20694 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
20695 | pulongest (content_type)); |
20696 | } | |
43988095 JK |
20697 | } |
20698 | ||
ecfb656c | 20699 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
20700 | } |
20701 | ||
20702 | *bufp = buf; | |
20703 | } | |
20704 | ||
debd256d | 20705 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20706 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20707 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20708 | Returns NULL if there is a problem reading the header, e.g., if it |
20709 | has a version we don't understand. | |
debd256d JB |
20710 | |
20711 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20712 | the returned object point into the dwarf line section buffer, |
20713 | and must not be freed. */ | |
ae2de4f8 | 20714 | |
fff8551c | 20715 | static line_header_up |
9c541725 | 20716 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20717 | { |
d521ce57 | 20718 | const gdb_byte *line_ptr; |
c764a876 | 20719 | unsigned int bytes_read, offset_size; |
debd256d | 20720 | int i; |
d521ce57 | 20721 | const char *cur_dir, *cur_file; |
3019eac3 DE |
20722 | struct dwarf2_section_info *section; |
20723 | bfd *abfd; | |
518817b3 SM |
20724 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20725 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 20726 | |
36586728 | 20727 | section = get_debug_line_section (cu); |
3019eac3 DE |
20728 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); |
20729 | if (section->buffer == NULL) | |
debd256d | 20730 | { |
3019eac3 | 20731 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 20732 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 20733 | else |
b98664d3 | 20734 | complaint (_("missing .debug_line section")); |
debd256d JB |
20735 | return 0; |
20736 | } | |
20737 | ||
fceca515 DE |
20738 | /* We can't do this until we know the section is non-empty. |
20739 | Only then do we know we have such a section. */ | |
a32a8923 | 20740 | abfd = get_section_bfd_owner (section); |
fceca515 | 20741 | |
a738430d MK |
20742 | /* Make sure that at least there's room for the total_length field. |
20743 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 20744 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 20745 | { |
4d3c2250 | 20746 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20747 | return 0; |
20748 | } | |
20749 | ||
fff8551c | 20750 | line_header_up lh (new line_header ()); |
debd256d | 20751 | |
9c541725 | 20752 | lh->sect_off = sect_off; |
527f3840 JK |
20753 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
20754 | ||
9c541725 | 20755 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 20756 | |
a738430d | 20757 | /* Read in the header. */ |
6e70227d | 20758 | lh->total_length = |
c764a876 DE |
20759 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
20760 | &bytes_read, &offset_size); | |
debd256d | 20761 | line_ptr += bytes_read; |
7ba99d21 AT |
20762 | |
20763 | const gdb_byte *start_here = line_ptr; | |
20764 | ||
3019eac3 | 20765 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 20766 | { |
4d3c2250 | 20767 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
20768 | return 0; |
20769 | } | |
7ba99d21 | 20770 | lh->statement_program_end = start_here + lh->total_length; |
debd256d JB |
20771 | lh->version = read_2_bytes (abfd, line_ptr); |
20772 | line_ptr += 2; | |
43988095 | 20773 | if (lh->version > 5) |
cd366ee8 DE |
20774 | { |
20775 | /* This is a version we don't understand. The format could have | |
20776 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 20777 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
20778 | return NULL; |
20779 | } | |
43988095 JK |
20780 | if (lh->version >= 5) |
20781 | { | |
20782 | gdb_byte segment_selector_size; | |
20783 | ||
20784 | /* Skip address size. */ | |
20785 | read_1_byte (abfd, line_ptr); | |
20786 | line_ptr += 1; | |
20787 | ||
20788 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
20789 | line_ptr += 1; | |
20790 | if (segment_selector_size != 0) | |
20791 | { | |
b98664d3 | 20792 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
20793 | "in .debug_line section"), |
20794 | segment_selector_size); | |
20795 | return NULL; | |
20796 | } | |
20797 | } | |
c764a876 DE |
20798 | lh->header_length = read_offset_1 (abfd, line_ptr, offset_size); |
20799 | line_ptr += offset_size; | |
7ba99d21 | 20800 | lh->statement_program_start = line_ptr + lh->header_length; |
debd256d JB |
20801 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
20802 | line_ptr += 1; | |
2dc7f7b3 TT |
20803 | if (lh->version >= 4) |
20804 | { | |
20805 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
20806 | line_ptr += 1; | |
20807 | } | |
20808 | else | |
20809 | lh->maximum_ops_per_instruction = 1; | |
20810 | ||
20811 | if (lh->maximum_ops_per_instruction == 0) | |
20812 | { | |
20813 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 20814 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 20815 | "in `.debug_line' section")); |
2dc7f7b3 TT |
20816 | } |
20817 | ||
debd256d JB |
20818 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
20819 | line_ptr += 1; | |
20820 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
20821 | line_ptr += 1; | |
20822 | lh->line_range = read_1_byte (abfd, line_ptr); | |
20823 | line_ptr += 1; | |
20824 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
20825 | line_ptr += 1; | |
fff8551c | 20826 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
20827 | |
20828 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
20829 | for (i = 1; i < lh->opcode_base; ++i) | |
20830 | { | |
20831 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
20832 | line_ptr += 1; | |
20833 | } | |
20834 | ||
43988095 | 20835 | if (lh->version >= 5) |
debd256d | 20836 | { |
43988095 | 20837 | /* Read directory table. */ |
ed2dc618 SM |
20838 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20839 | &cu->header, | |
b926417a | 20840 | [] (struct line_header *header, const char *name, |
ecfb656c | 20841 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20842 | unsigned int length) |
20843 | { | |
b926417a | 20844 | header->add_include_dir (name); |
fff8551c | 20845 | }); |
debd256d | 20846 | |
43988095 | 20847 | /* Read file name table. */ |
ed2dc618 SM |
20848 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
20849 | &cu->header, | |
b926417a | 20850 | [] (struct line_header *header, const char *name, |
ecfb656c | 20851 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
20852 | unsigned int length) |
20853 | { | |
b926417a | 20854 | header->add_file_name (name, d_index, mod_time, length); |
fff8551c | 20855 | }); |
43988095 JK |
20856 | } |
20857 | else | |
debd256d | 20858 | { |
43988095 JK |
20859 | /* Read directory table. */ |
20860 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20861 | { | |
20862 | line_ptr += bytes_read; | |
fff8551c | 20863 | lh->add_include_dir (cur_dir); |
43988095 | 20864 | } |
debd256d JB |
20865 | line_ptr += bytes_read; |
20866 | ||
43988095 JK |
20867 | /* Read file name table. */ |
20868 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
20869 | { | |
ecfb656c PA |
20870 | unsigned int mod_time, length; |
20871 | dir_index d_index; | |
43988095 JK |
20872 | |
20873 | line_ptr += bytes_read; | |
ecfb656c | 20874 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
20875 | line_ptr += bytes_read; |
20876 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20877 | line_ptr += bytes_read; | |
20878 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20879 | line_ptr += bytes_read; | |
20880 | ||
ecfb656c | 20881 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
20882 | } |
20883 | line_ptr += bytes_read; | |
debd256d | 20884 | } |
debd256d | 20885 | |
3019eac3 | 20886 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 20887 | complaint (_("line number info header doesn't " |
3e43a32a | 20888 | "fit in `.debug_line' section")); |
debd256d | 20889 | |
debd256d JB |
20890 | return lh; |
20891 | } | |
c906108c | 20892 | |
c6da4cef | 20893 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 20894 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 20895 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
20896 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
20897 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 20898 | |
d521ce57 | 20899 | static const char * |
7ba99d21 | 20900 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
c6da4cef | 20901 | const struct partial_symtab *pst, |
c89b44cd TT |
20902 | const char *comp_dir, |
20903 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 20904 | { |
d521ce57 TT |
20905 | const char *include_name = fe.name; |
20906 | const char *include_name_to_compare = include_name; | |
72b9f47f | 20907 | const char *pst_filename; |
c6da4cef DE |
20908 | int file_is_pst; |
20909 | ||
8c43009f | 20910 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 20911 | |
c89b44cd | 20912 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
20913 | if (!IS_ABSOLUTE_PATH (include_name) |
20914 | && (dir_name != NULL || comp_dir != NULL)) | |
20915 | { | |
20916 | /* Avoid creating a duplicate psymtab for PST. | |
20917 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20918 | Before we do the comparison, however, we need to account | |
20919 | for DIR_NAME and COMP_DIR. | |
20920 | First prepend dir_name (if non-NULL). If we still don't | |
20921 | have an absolute path prepend comp_dir (if non-NULL). | |
20922 | However, the directory we record in the include-file's | |
20923 | psymtab does not contain COMP_DIR (to match the | |
20924 | corresponding symtab(s)). | |
20925 | ||
20926 | Example: | |
20927 | ||
20928 | bash$ cd /tmp | |
20929 | bash$ gcc -g ./hello.c | |
20930 | include_name = "hello.c" | |
20931 | dir_name = "." | |
20932 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20933 | DW_AT_name = "./hello.c" |
20934 | ||
20935 | */ | |
c6da4cef DE |
20936 | |
20937 | if (dir_name != NULL) | |
20938 | { | |
c89b44cd TT |
20939 | name_holder->reset (concat (dir_name, SLASH_STRING, |
20940 | include_name, (char *) NULL)); | |
20941 | include_name = name_holder->get (); | |
c6da4cef | 20942 | include_name_to_compare = include_name; |
c6da4cef DE |
20943 | } |
20944 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20945 | { | |
c89b44cd TT |
20946 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
20947 | include_name, (char *) NULL)); | |
20948 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
20949 | } |
20950 | } | |
20951 | ||
20952 | pst_filename = pst->filename; | |
c89b44cd | 20953 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
20954 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
20955 | { | |
c89b44cd TT |
20956 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
20957 | pst_filename, (char *) NULL)); | |
20958 | pst_filename = copied_name.get (); | |
c6da4cef DE |
20959 | } |
20960 | ||
1e3fad37 | 20961 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20962 | |
c6da4cef DE |
20963 | if (file_is_pst) |
20964 | return NULL; | |
20965 | return include_name; | |
20966 | } | |
20967 | ||
d9b3de22 DE |
20968 | /* State machine to track the state of the line number program. */ |
20969 | ||
6f77053d | 20970 | class lnp_state_machine |
d9b3de22 | 20971 | { |
6f77053d PA |
20972 | public: |
20973 | /* Initialize a machine state for the start of a line number | |
20974 | program. */ | |
804d2729 TT |
20975 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
20976 | bool record_lines_p); | |
6f77053d | 20977 | |
8c43009f PA |
20978 | file_entry *current_file () |
20979 | { | |
20980 | /* lh->file_names is 0-based, but the file name numbers in the | |
20981 | statement program are 1-based. */ | |
6f77053d PA |
20982 | return m_line_header->file_name_at (m_file); |
20983 | } | |
20984 | ||
20985 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20986 | we're processing the end of a sequence. */ | |
20987 | void record_line (bool end_sequence); | |
20988 | ||
7ab6656f OJ |
20989 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
20990 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
20991 | void check_line_address (struct dwarf2_cu *cu, |
20992 | const gdb_byte *line_ptr, | |
7ab6656f | 20993 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
20994 | |
20995 | void handle_set_discriminator (unsigned int discriminator) | |
20996 | { | |
20997 | m_discriminator = discriminator; | |
20998 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20999 | } | |
21000 | ||
21001 | /* Handle DW_LNE_set_address. */ | |
21002 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
21003 | { | |
21004 | m_op_index = 0; | |
21005 | address += baseaddr; | |
21006 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
21007 | } | |
21008 | ||
21009 | /* Handle DW_LNS_advance_pc. */ | |
21010 | void handle_advance_pc (CORE_ADDR adjust); | |
21011 | ||
21012 | /* Handle a special opcode. */ | |
21013 | void handle_special_opcode (unsigned char op_code); | |
21014 | ||
21015 | /* Handle DW_LNS_advance_line. */ | |
21016 | void handle_advance_line (int line_delta) | |
21017 | { | |
21018 | advance_line (line_delta); | |
21019 | } | |
21020 | ||
21021 | /* Handle DW_LNS_set_file. */ | |
21022 | void handle_set_file (file_name_index file); | |
21023 | ||
21024 | /* Handle DW_LNS_negate_stmt. */ | |
21025 | void handle_negate_stmt () | |
21026 | { | |
21027 | m_is_stmt = !m_is_stmt; | |
21028 | } | |
21029 | ||
21030 | /* Handle DW_LNS_const_add_pc. */ | |
21031 | void handle_const_add_pc (); | |
21032 | ||
21033 | /* Handle DW_LNS_fixed_advance_pc. */ | |
21034 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
21035 | { | |
21036 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
21037 | m_op_index = 0; | |
21038 | } | |
21039 | ||
21040 | /* Handle DW_LNS_copy. */ | |
21041 | void handle_copy () | |
21042 | { | |
21043 | record_line (false); | |
21044 | m_discriminator = 0; | |
21045 | } | |
21046 | ||
21047 | /* Handle DW_LNE_end_sequence. */ | |
21048 | void handle_end_sequence () | |
21049 | { | |
804d2729 | 21050 | m_currently_recording_lines = true; |
6f77053d PA |
21051 | } |
21052 | ||
21053 | private: | |
21054 | /* Advance the line by LINE_DELTA. */ | |
21055 | void advance_line (int line_delta) | |
21056 | { | |
21057 | m_line += line_delta; | |
21058 | ||
21059 | if (line_delta != 0) | |
21060 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
21061 | } |
21062 | ||
804d2729 TT |
21063 | struct dwarf2_cu *m_cu; |
21064 | ||
6f77053d PA |
21065 | gdbarch *m_gdbarch; |
21066 | ||
21067 | /* True if we're recording lines. | |
21068 | Otherwise we're building partial symtabs and are just interested in | |
21069 | finding include files mentioned by the line number program. */ | |
21070 | bool m_record_lines_p; | |
21071 | ||
8c43009f | 21072 | /* The line number header. */ |
6f77053d | 21073 | line_header *m_line_header; |
8c43009f | 21074 | |
6f77053d PA |
21075 | /* These are part of the standard DWARF line number state machine, |
21076 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 21077 | |
6f77053d | 21078 | unsigned char m_op_index = 0; |
7ba99d21 AT |
21079 | /* The line table index of the current file. */ |
21080 | file_name_index m_file = 1; | |
6f77053d PA |
21081 | unsigned int m_line = 1; |
21082 | ||
21083 | /* These are initialized in the constructor. */ | |
21084 | ||
21085 | CORE_ADDR m_address; | |
21086 | bool m_is_stmt; | |
21087 | unsigned int m_discriminator; | |
d9b3de22 DE |
21088 | |
21089 | /* Additional bits of state we need to track. */ | |
21090 | ||
21091 | /* The last file that we called dwarf2_start_subfile for. | |
21092 | This is only used for TLLs. */ | |
6f77053d | 21093 | unsigned int m_last_file = 0; |
d9b3de22 | 21094 | /* The last file a line number was recorded for. */ |
6f77053d | 21095 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 21096 | |
804d2729 TT |
21097 | /* When true, record the lines we decode. */ |
21098 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
21099 | |
21100 | /* The last line number that was recorded, used to coalesce | |
21101 | consecutive entries for the same line. This can happen, for | |
21102 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
21103 | unsigned int m_last_line = 0; |
21104 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 21105 | }; |
d9b3de22 | 21106 | |
6f77053d PA |
21107 | void |
21108 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
21109 | { | |
21110 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
21111 | / m_line_header->maximum_ops_per_instruction) | |
21112 | * m_line_header->minimum_instruction_length); | |
21113 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
21114 | m_op_index = ((m_op_index + adjust) | |
21115 | % m_line_header->maximum_ops_per_instruction); | |
21116 | } | |
d9b3de22 | 21117 | |
6f77053d PA |
21118 | void |
21119 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 21120 | { |
6f77053d PA |
21121 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
21122 | CORE_ADDR addr_adj = (((m_op_index | |
21123 | + (adj_opcode / m_line_header->line_range)) | |
21124 | / m_line_header->maximum_ops_per_instruction) | |
21125 | * m_line_header->minimum_instruction_length); | |
21126 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
21127 | m_op_index = ((m_op_index + (adj_opcode / m_line_header->line_range)) | |
21128 | % m_line_header->maximum_ops_per_instruction); | |
d9b3de22 | 21129 | |
6f77053d PA |
21130 | int line_delta = (m_line_header->line_base |
21131 | + (adj_opcode % m_line_header->line_range)); | |
21132 | advance_line (line_delta); | |
21133 | record_line (false); | |
21134 | m_discriminator = 0; | |
21135 | } | |
d9b3de22 | 21136 | |
6f77053d PA |
21137 | void |
21138 | lnp_state_machine::handle_set_file (file_name_index file) | |
21139 | { | |
21140 | m_file = file; | |
21141 | ||
21142 | const file_entry *fe = current_file (); | |
21143 | if (fe == NULL) | |
21144 | dwarf2_debug_line_missing_file_complaint (); | |
21145 | else if (m_record_lines_p) | |
21146 | { | |
21147 | const char *dir = fe->include_dir (m_line_header); | |
21148 | ||
c24bdb02 | 21149 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 21150 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 21151 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
21152 | } |
21153 | } | |
21154 | ||
21155 | void | |
21156 | lnp_state_machine::handle_const_add_pc () | |
21157 | { | |
21158 | CORE_ADDR adjust | |
21159 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
21160 | ||
21161 | CORE_ADDR addr_adj | |
21162 | = (((m_op_index + adjust) | |
21163 | / m_line_header->maximum_ops_per_instruction) | |
21164 | * m_line_header->minimum_instruction_length); | |
21165 | ||
21166 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
21167 | m_op_index = ((m_op_index + adjust) | |
21168 | % m_line_header->maximum_ops_per_instruction); | |
21169 | } | |
d9b3de22 | 21170 | |
a05a36a5 DE |
21171 | /* Return non-zero if we should add LINE to the line number table. |
21172 | LINE is the line to add, LAST_LINE is the last line that was added, | |
21173 | LAST_SUBFILE is the subfile for LAST_LINE. | |
21174 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
21175 | had a non-zero discriminator. | |
21176 | ||
21177 | We have to be careful in the presence of discriminators. | |
21178 | E.g., for this line: | |
21179 | ||
21180 | for (i = 0; i < 100000; i++); | |
21181 | ||
21182 | clang can emit four line number entries for that one line, | |
21183 | each with a different discriminator. | |
21184 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
21185 | ||
21186 | However, we want gdb to coalesce all four entries into one. | |
21187 | Otherwise the user could stepi into the middle of the line and | |
21188 | gdb would get confused about whether the pc really was in the | |
21189 | middle of the line. | |
21190 | ||
21191 | Things are further complicated by the fact that two consecutive | |
21192 | line number entries for the same line is a heuristic used by gcc | |
21193 | to denote the end of the prologue. So we can't just discard duplicate | |
21194 | entries, we have to be selective about it. The heuristic we use is | |
21195 | that we only collapse consecutive entries for the same line if at least | |
21196 | one of those entries has a non-zero discriminator. PR 17276. | |
21197 | ||
21198 | Note: Addresses in the line number state machine can never go backwards | |
21199 | within one sequence, thus this coalescing is ok. */ | |
21200 | ||
21201 | static int | |
804d2729 TT |
21202 | dwarf_record_line_p (struct dwarf2_cu *cu, |
21203 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
21204 | int line_has_non_zero_discriminator, |
21205 | struct subfile *last_subfile) | |
21206 | { | |
c24bdb02 | 21207 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
21208 | return 1; |
21209 | if (line != last_line) | |
21210 | return 1; | |
21211 | /* Same line for the same file that we've seen already. | |
21212 | As a last check, for pr 17276, only record the line if the line | |
21213 | has never had a non-zero discriminator. */ | |
21214 | if (!line_has_non_zero_discriminator) | |
21215 | return 1; | |
21216 | return 0; | |
21217 | } | |
21218 | ||
804d2729 TT |
21219 | /* Use the CU's builder to record line number LINE beginning at |
21220 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
21221 | |
21222 | static void | |
d9b3de22 DE |
21223 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
21224 | unsigned int line, CORE_ADDR address, | |
804d2729 | 21225 | struct dwarf2_cu *cu) |
252a6764 DE |
21226 | { |
21227 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
21228 | ||
27e0867f DE |
21229 | if (dwarf_line_debug) |
21230 | { | |
21231 | fprintf_unfiltered (gdb_stdlog, | |
21232 | "Recording line %u, file %s, address %s\n", | |
21233 | line, lbasename (subfile->name), | |
21234 | paddress (gdbarch, address)); | |
21235 | } | |
21236 | ||
804d2729 | 21237 | if (cu != nullptr) |
c24bdb02 | 21238 | cu->get_builder ()->record_line (subfile, line, addr); |
252a6764 DE |
21239 | } |
21240 | ||
21241 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
21242 | Mark the end of a set of line number records. | |
d9b3de22 | 21243 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
21244 | If SUBFILE is NULL the request is ignored. */ |
21245 | ||
21246 | static void | |
21247 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 21248 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 21249 | { |
27e0867f DE |
21250 | if (subfile == NULL) |
21251 | return; | |
21252 | ||
21253 | if (dwarf_line_debug) | |
21254 | { | |
21255 | fprintf_unfiltered (gdb_stdlog, | |
21256 | "Finishing current line, file %s, address %s\n", | |
21257 | lbasename (subfile->name), | |
21258 | paddress (gdbarch, address)); | |
21259 | } | |
21260 | ||
804d2729 | 21261 | dwarf_record_line_1 (gdbarch, subfile, 0, address, cu); |
d9b3de22 DE |
21262 | } |
21263 | ||
6f77053d PA |
21264 | void |
21265 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 21266 | { |
d9b3de22 DE |
21267 | if (dwarf_line_debug) |
21268 | { | |
21269 | fprintf_unfiltered (gdb_stdlog, | |
21270 | "Processing actual line %u: file %u," | |
21271 | " address %s, is_stmt %u, discrim %u\n", | |
7ba99d21 | 21272 | m_line, m_file, |
6f77053d PA |
21273 | paddress (m_gdbarch, m_address), |
21274 | m_is_stmt, m_discriminator); | |
d9b3de22 DE |
21275 | } |
21276 | ||
6f77053d | 21277 | file_entry *fe = current_file (); |
8c43009f PA |
21278 | |
21279 | if (fe == NULL) | |
d9b3de22 DE |
21280 | dwarf2_debug_line_missing_file_complaint (); |
21281 | /* For now we ignore lines not starting on an instruction boundary. | |
21282 | But not when processing end_sequence for compatibility with the | |
21283 | previous version of the code. */ | |
6f77053d | 21284 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 21285 | { |
8c43009f | 21286 | fe->included_p = 1; |
c258c396 | 21287 | if (m_record_lines_p && (producer_is_codewarrior (m_cu) || m_is_stmt)) |
d9b3de22 | 21288 | { |
c24bdb02 | 21289 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 21290 | || end_sequence) |
d9b3de22 | 21291 | { |
804d2729 TT |
21292 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
21293 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
21294 | } |
21295 | ||
21296 | if (!end_sequence) | |
21297 | { | |
804d2729 | 21298 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
21299 | m_line_has_non_zero_discriminator, |
21300 | m_last_subfile)) | |
d9b3de22 | 21301 | { |
c24bdb02 | 21302 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 21303 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 21304 | builder->get_current_subfile (), |
6f77053d | 21305 | m_line, m_address, |
804d2729 | 21306 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 21307 | } |
c24bdb02 | 21308 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 21309 | m_last_line = m_line; |
d9b3de22 DE |
21310 | } |
21311 | } | |
21312 | } | |
21313 | } | |
21314 | ||
804d2729 TT |
21315 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
21316 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 21317 | { |
804d2729 | 21318 | m_cu = cu; |
6f77053d PA |
21319 | m_gdbarch = arch; |
21320 | m_record_lines_p = record_lines_p; | |
21321 | m_line_header = lh; | |
d9b3de22 | 21322 | |
804d2729 | 21323 | m_currently_recording_lines = true; |
d9b3de22 | 21324 | |
d9b3de22 DE |
21325 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
21326 | was a line entry for it so that the backend has a chance to adjust it | |
21327 | and also record it in case it needs it. This is currently used by MIPS | |
21328 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
21329 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
21330 | m_is_stmt = lh->default_is_stmt; | |
21331 | m_discriminator = 0; | |
252a6764 DE |
21332 | } |
21333 | ||
6f77053d PA |
21334 | void |
21335 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
21336 | const gdb_byte *line_ptr, | |
7ab6656f | 21337 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 21338 | { |
7ab6656f OJ |
21339 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
21340 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
21341 | values of zero to preserve GDB's previous behaviour which is to handle | |
21342 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 21343 | |
7ab6656f | 21344 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
21345 | { |
21346 | /* This line table is for a function which has been | |
21347 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
21348 | ||
518817b3 | 21349 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
21350 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
21351 | ||
b98664d3 | 21352 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 21353 | line_offset, objfile_name (objfile)); |
804d2729 TT |
21354 | m_currently_recording_lines = false; |
21355 | /* Note: m_currently_recording_lines is left as false until we see | |
21356 | DW_LNE_end_sequence. */ | |
924c2928 DE |
21357 | } |
21358 | } | |
21359 | ||
f3f5162e | 21360 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
21361 | Process the line number information in LH. |
21362 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
21363 | program in order to set included_p for every referenced header. */ | |
debd256d | 21364 | |
c906108c | 21365 | static void |
43f3e411 DE |
21366 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
21367 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 21368 | { |
d521ce57 TT |
21369 | const gdb_byte *line_ptr, *extended_end; |
21370 | const gdb_byte *line_end; | |
a8c50c1f | 21371 | unsigned int bytes_read, extended_len; |
699ca60a | 21372 | unsigned char op_code, extended_op; |
e142c38c | 21373 | CORE_ADDR baseaddr; |
518817b3 | 21374 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 21375 | bfd *abfd = objfile->obfd; |
fbf65064 | 21376 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
21377 | /* True if we're recording line info (as opposed to building partial |
21378 | symtabs and just interested in finding include files mentioned by | |
21379 | the line number program). */ | |
21380 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 21381 | |
6a053cb1 | 21382 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
c906108c | 21383 | |
debd256d JB |
21384 | line_ptr = lh->statement_program_start; |
21385 | line_end = lh->statement_program_end; | |
c906108c SS |
21386 | |
21387 | /* Read the statement sequences until there's nothing left. */ | |
21388 | while (line_ptr < line_end) | |
21389 | { | |
6f77053d PA |
21390 | /* The DWARF line number program state machine. Reset the state |
21391 | machine at the start of each sequence. */ | |
804d2729 | 21392 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 21393 | bool end_sequence = false; |
d9b3de22 | 21394 | |
8c43009f | 21395 | if (record_lines_p) |
c906108c | 21396 | { |
8c43009f PA |
21397 | /* Start a subfile for the current file of the state |
21398 | machine. */ | |
21399 | const file_entry *fe = state_machine.current_file (); | |
21400 | ||
21401 | if (fe != NULL) | |
804d2729 | 21402 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
21403 | } |
21404 | ||
a738430d | 21405 | /* Decode the table. */ |
d9b3de22 | 21406 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
21407 | { |
21408 | op_code = read_1_byte (abfd, line_ptr); | |
21409 | line_ptr += 1; | |
9aa1fe7e | 21410 | |
debd256d | 21411 | if (op_code >= lh->opcode_base) |
6e70227d | 21412 | { |
8e07a239 | 21413 | /* Special opcode. */ |
6f77053d | 21414 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
21415 | } |
21416 | else switch (op_code) | |
c906108c SS |
21417 | { |
21418 | case DW_LNS_extended_op: | |
3e43a32a MS |
21419 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
21420 | &bytes_read); | |
473b7be6 | 21421 | line_ptr += bytes_read; |
a8c50c1f | 21422 | extended_end = line_ptr + extended_len; |
c906108c SS |
21423 | extended_op = read_1_byte (abfd, line_ptr); |
21424 | line_ptr += 1; | |
21425 | switch (extended_op) | |
21426 | { | |
21427 | case DW_LNE_end_sequence: | |
6f77053d PA |
21428 | state_machine.handle_end_sequence (); |
21429 | end_sequence = true; | |
c906108c SS |
21430 | break; |
21431 | case DW_LNE_set_address: | |
d9b3de22 DE |
21432 | { |
21433 | CORE_ADDR address | |
21434 | = read_address (abfd, line_ptr, cu, &bytes_read); | |
d9b3de22 | 21435 | line_ptr += bytes_read; |
6f77053d PA |
21436 | |
21437 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 21438 | lowpc - baseaddr, address); |
6f77053d | 21439 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 21440 | } |
c906108c SS |
21441 | break; |
21442 | case DW_LNE_define_file: | |
debd256d | 21443 | { |
d521ce57 | 21444 | const char *cur_file; |
ecfb656c PA |
21445 | unsigned int mod_time, length; |
21446 | dir_index dindex; | |
6e70227d | 21447 | |
3e43a32a MS |
21448 | cur_file = read_direct_string (abfd, line_ptr, |
21449 | &bytes_read); | |
debd256d | 21450 | line_ptr += bytes_read; |
ecfb656c | 21451 | dindex = (dir_index) |
debd256d JB |
21452 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
21453 | line_ptr += bytes_read; | |
21454 | mod_time = | |
21455 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21456 | line_ptr += bytes_read; | |
21457 | length = | |
21458 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21459 | line_ptr += bytes_read; | |
ecfb656c | 21460 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 21461 | } |
c906108c | 21462 | break; |
d0c6ba3d | 21463 | case DW_LNE_set_discriminator: |
6f77053d PA |
21464 | { |
21465 | /* The discriminator is not interesting to the | |
21466 | debugger; just ignore it. We still need to | |
21467 | check its value though: | |
21468 | if there are consecutive entries for the same | |
21469 | (non-prologue) line we want to coalesce them. | |
21470 | PR 17276. */ | |
21471 | unsigned int discr | |
21472 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21473 | line_ptr += bytes_read; | |
21474 | ||
21475 | state_machine.handle_set_discriminator (discr); | |
21476 | } | |
d0c6ba3d | 21477 | break; |
c906108c | 21478 | default: |
b98664d3 | 21479 | complaint (_("mangled .debug_line section")); |
debd256d | 21480 | return; |
c906108c | 21481 | } |
a8c50c1f DJ |
21482 | /* Make sure that we parsed the extended op correctly. If e.g. |
21483 | we expected a different address size than the producer used, | |
21484 | we may have read the wrong number of bytes. */ | |
21485 | if (line_ptr != extended_end) | |
21486 | { | |
b98664d3 | 21487 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
21488 | return; |
21489 | } | |
c906108c SS |
21490 | break; |
21491 | case DW_LNS_copy: | |
6f77053d | 21492 | state_machine.handle_copy (); |
c906108c SS |
21493 | break; |
21494 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
21495 | { |
21496 | CORE_ADDR adjust | |
21497 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 21498 | line_ptr += bytes_read; |
6f77053d PA |
21499 | |
21500 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 21501 | } |
c906108c SS |
21502 | break; |
21503 | case DW_LNS_advance_line: | |
a05a36a5 DE |
21504 | { |
21505 | int line_delta | |
21506 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 21507 | line_ptr += bytes_read; |
6f77053d PA |
21508 | |
21509 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 21510 | } |
c906108c SS |
21511 | break; |
21512 | case DW_LNS_set_file: | |
d9b3de22 | 21513 | { |
6f77053d | 21514 | file_name_index file |
ecfb656c PA |
21515 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
21516 | &bytes_read); | |
d9b3de22 | 21517 | line_ptr += bytes_read; |
8c43009f | 21518 | |
6f77053d | 21519 | state_machine.handle_set_file (file); |
d9b3de22 | 21520 | } |
c906108c SS |
21521 | break; |
21522 | case DW_LNS_set_column: | |
0ad93d4f | 21523 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
21524 | line_ptr += bytes_read; |
21525 | break; | |
21526 | case DW_LNS_negate_stmt: | |
6f77053d | 21527 | state_machine.handle_negate_stmt (); |
c906108c SS |
21528 | break; |
21529 | case DW_LNS_set_basic_block: | |
c906108c | 21530 | break; |
c2c6d25f JM |
21531 | /* Add to the address register of the state machine the |
21532 | address increment value corresponding to special opcode | |
a738430d MK |
21533 | 255. I.e., this value is scaled by the minimum |
21534 | instruction length since special opcode 255 would have | |
b021a221 | 21535 | scaled the increment. */ |
c906108c | 21536 | case DW_LNS_const_add_pc: |
6f77053d | 21537 | state_machine.handle_const_add_pc (); |
c906108c SS |
21538 | break; |
21539 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 21540 | { |
6f77053d | 21541 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 21542 | line_ptr += 2; |
6f77053d PA |
21543 | |
21544 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 21545 | } |
c906108c | 21546 | break; |
9aa1fe7e | 21547 | default: |
a738430d MK |
21548 | { |
21549 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 21550 | int i; |
a738430d | 21551 | |
debd256d | 21552 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
21553 | { |
21554 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21555 | line_ptr += bytes_read; | |
21556 | } | |
21557 | } | |
c906108c SS |
21558 | } |
21559 | } | |
d9b3de22 DE |
21560 | |
21561 | if (!end_sequence) | |
21562 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
21563 | ||
21564 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
21565 | in which case we still finish recording the last line). */ | |
6f77053d | 21566 | state_machine.record_line (true); |
c906108c | 21567 | } |
f3f5162e DE |
21568 | } |
21569 | ||
21570 | /* Decode the Line Number Program (LNP) for the given line_header | |
21571 | structure and CU. The actual information extracted and the type | |
21572 | of structures created from the LNP depends on the value of PST. | |
21573 | ||
21574 | 1. If PST is NULL, then this procedure uses the data from the program | |
21575 | to create all necessary symbol tables, and their linetables. | |
21576 | ||
21577 | 2. If PST is not NULL, this procedure reads the program to determine | |
21578 | the list of files included by the unit represented by PST, and | |
21579 | builds all the associated partial symbol tables. | |
21580 | ||
21581 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
21582 | It is used for relative paths in the line table. | |
21583 | NOTE: When processing partial symtabs (pst != NULL), | |
21584 | comp_dir == pst->dirname. | |
21585 | ||
21586 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
21587 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
21588 | symtab we don't use it in the name of the psymtabs we create. | |
21589 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
21590 | A good testcase for this is mb-inline.exp. |
21591 | ||
527f3840 JK |
21592 | LOWPC is the lowest address in CU (or 0 if not known). |
21593 | ||
21594 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
21595 | for its PC<->lines mapping information. Otherwise only the filename | |
21596 | table is read in. */ | |
f3f5162e DE |
21597 | |
21598 | static void | |
21599 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
c3b7b696 | 21600 | struct dwarf2_cu *cu, struct partial_symtab *pst, |
527f3840 | 21601 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 21602 | { |
518817b3 | 21603 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 21604 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 21605 | |
527f3840 JK |
21606 | if (decode_mapping) |
21607 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
21608 | |
21609 | if (decode_for_pst_p) | |
21610 | { | |
aaa75496 JB |
21611 | /* Now that we're done scanning the Line Header Program, we can |
21612 | create the psymtab of each included file. */ | |
7ba99d21 AT |
21613 | for (auto &file_entry : lh->file_names ()) |
21614 | if (file_entry.included_p == 1) | |
aaa75496 | 21615 | { |
c89b44cd | 21616 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 21617 | const char *include_name = |
7ba99d21 AT |
21618 | psymtab_include_file_name (lh, file_entry, pst, |
21619 | comp_dir, &name_holder); | |
c6da4cef | 21620 | if (include_name != NULL) |
aaa75496 JB |
21621 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
21622 | } | |
21623 | } | |
cb1df416 DJ |
21624 | else |
21625 | { | |
21626 | /* Make sure a symtab is created for every file, even files | |
21627 | which contain only variables (i.e. no code with associated | |
21628 | line numbers). */ | |
c24bdb02 KS |
21629 | buildsym_compunit *builder = cu->get_builder (); |
21630 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 21631 | |
7ba99d21 | 21632 | for (auto &fe : lh->file_names ()) |
cb1df416 | 21633 | { |
804d2729 | 21634 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 21635 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 21636 | { |
c24bdb02 | 21637 | builder->get_current_subfile ()->symtab |
804d2729 | 21638 | = allocate_symtab (cust, |
c24bdb02 | 21639 | builder->get_current_subfile ()->name); |
43f3e411 | 21640 | } |
c24bdb02 | 21641 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
21642 | } |
21643 | } | |
c906108c SS |
21644 | } |
21645 | ||
21646 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21647 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21648 | or NULL if not known. |
c906108c SS |
21649 | This routine tries to keep line numbers from identical absolute and |
21650 | relative file names in a common subfile. | |
21651 | ||
21652 | Using the `list' example from the GDB testsuite, which resides in | |
21653 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21654 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21655 | ||
c5aa993b | 21656 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21657 | DW_AT_comp_dir: /compdir |
357e46e7 | 21658 | files.files[0].name: list0.h |
c5aa993b | 21659 | files.files[0].dir: /srcdir |
357e46e7 | 21660 | files.files[1].name: list0.c |
c5aa993b | 21661 | files.files[1].dir: /srcdir |
c906108c SS |
21662 | |
21663 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21664 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21665 | start_subfile will ensure that this happens provided that we pass the | |
21666 | concatenation of files.files[1].dir and files.files[1].name as the | |
21667 | subfile's name. */ | |
c906108c SS |
21668 | |
21669 | static void | |
804d2729 TT |
21670 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
21671 | const char *dirname) | |
c906108c | 21672 | { |
43816ebc | 21673 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 21674 | |
4d663531 | 21675 | /* In order not to lose the line information directory, |
4f1520fb FR |
21676 | we concatenate it to the filename when it makes sense. |
21677 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21678 | information): ``The directory index is ignored for file names | |
21679 | that represent full path names''. Thus ignoring dirname in the | |
21680 | `else' branch below isn't an issue. */ | |
c906108c | 21681 | |
d5166ae1 | 21682 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 21683 | { |
43816ebc TT |
21684 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
21685 | filename = copy.get (); | |
d521ce57 | 21686 | } |
c906108c | 21687 | |
c24bdb02 | 21688 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
21689 | } |
21690 | ||
804d2729 TT |
21691 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
21692 | buildsym_compunit constructor. */ | |
f4dc4d17 | 21693 | |
c24bdb02 KS |
21694 | struct compunit_symtab * |
21695 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
21696 | CORE_ADDR low_pc) | |
f4dc4d17 | 21697 | { |
c24bdb02 | 21698 | gdb_assert (m_builder == nullptr); |
43f3e411 | 21699 | |
c24bdb02 KS |
21700 | m_builder.reset (new struct buildsym_compunit |
21701 | (per_cu->dwarf2_per_objfile->objfile, | |
21702 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 21703 | |
c24bdb02 | 21704 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 21705 | |
5922befa | 21706 | get_builder ()->record_debugformat (xstrprintf ("DWARF %d", this->header.version)); |
c24bdb02 | 21707 | get_builder ()->record_producer (producer); |
f4dc4d17 | 21708 | |
c24bdb02 | 21709 | processing_has_namespace_info = false; |
43f3e411 | 21710 | |
c24bdb02 | 21711 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
21712 | } |
21713 | ||
4c2df51b DJ |
21714 | static void |
21715 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21716 | struct dwarf2_cu *cu) |
4c2df51b | 21717 | { |
518817b3 | 21718 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
21719 | struct comp_unit_head *cu_header = &cu->header; |
21720 | ||
4c2df51b DJ |
21721 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21722 | code here to turn a symbol with DW_AT_external and a | |
21723 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21724 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21725 | with some versions of binutils) where shared libraries could have | |
21726 | relocations against symbols in their debug information - the | |
21727 | minimal symbol would have the right address, but the debug info | |
21728 | would not. It's no longer necessary, because we will explicitly | |
21729 | apply relocations when we read in the debug information now. */ | |
21730 | ||
21731 | /* A DW_AT_location attribute with no contents indicates that a | |
21732 | variable has been optimized away. */ | |
21733 | if (attr_form_is_block (attr) && DW_BLOCK (attr)->size == 0) | |
21734 | { | |
f1e6e072 | 21735 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21736 | return; |
21737 | } | |
21738 | ||
21739 | /* Handle one degenerate form of location expression specially, to | |
21740 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
21741 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
21742 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b DJ |
21743 | |
21744 | if (attr_form_is_block (attr) | |
3019eac3 DE |
21745 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
21746 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
21747 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
21748 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
21749 | && (DW_BLOCK (attr)->size |
21750 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 21751 | { |
891d2f0b | 21752 | unsigned int dummy; |
4c2df51b | 21753 | |
3019eac3 | 21754 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
38583298 TT |
21755 | SET_SYMBOL_VALUE_ADDRESS (sym, |
21756 | read_address (objfile->obfd, | |
21757 | DW_BLOCK (attr)->data + 1, | |
21758 | cu, &dummy)); | |
3019eac3 | 21759 | else |
38583298 TT |
21760 | SET_SYMBOL_VALUE_ADDRESS |
21761 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, | |
21762 | &dummy)); | |
f1e6e072 | 21763 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b | 21764 | fixup_symbol_section (sym, objfile); |
6a053cb1 TT |
21765 | SET_SYMBOL_VALUE_ADDRESS |
21766 | (sym, | |
21767 | SYMBOL_VALUE_ADDRESS (sym) | |
21768 | + objfile->section_offsets[SYMBOL_SECTION (sym)]); | |
4c2df51b DJ |
21769 | return; |
21770 | } | |
21771 | ||
21772 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21773 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21774 | (i.e. when the value of a register or memory location is | |
21775 | referenced, or a thread-local block, etc.). Then again, it might | |
21776 | not be worthwhile. I'm assuming that it isn't unless performance | |
21777 | or memory numbers show me otherwise. */ | |
21778 | ||
f1e6e072 | 21779 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21780 | |
f1e6e072 | 21781 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 21782 | cu->has_loclist = true; |
4c2df51b DJ |
21783 | } |
21784 | ||
c906108c SS |
21785 | /* Given a pointer to a DWARF information entry, figure out if we need |
21786 | to make a symbol table entry for it, and if so, create a new entry | |
21787 | and return a pointer to it. | |
21788 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21789 | used the passed type. |
21790 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21791 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21792 | |
21793 | static struct symbol * | |
5e2db402 TT |
21794 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21795 | struct symbol *space) | |
c906108c | 21796 | { |
518817b3 SM |
21797 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21798 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21799 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 21800 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 21801 | struct symbol *sym = NULL; |
15d034d0 | 21802 | const char *name; |
c906108c SS |
21803 | struct attribute *attr = NULL; |
21804 | struct attribute *attr2 = NULL; | |
e142c38c | 21805 | CORE_ADDR baseaddr; |
e37fd15a SW |
21806 | struct pending **list_to_add = NULL; |
21807 | ||
edb3359d | 21808 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 21809 | |
6a053cb1 | 21810 | baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
c906108c | 21811 | |
94af9270 | 21812 | name = dwarf2_name (die, cu); |
c906108c SS |
21813 | if (name) |
21814 | { | |
94af9270 | 21815 | const char *linkagename; |
34eaf542 | 21816 | int suppress_add = 0; |
94af9270 | 21817 | |
34eaf542 TT |
21818 | if (space) |
21819 | sym = space; | |
21820 | else | |
e623cf5d | 21821 | sym = allocate_symbol (objfile); |
c906108c | 21822 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21823 | |
21824 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 21825 | sym->set_language (cu->language, &objfile->objfile_obstack); |
94af9270 | 21826 | linkagename = dwarf2_physname (name, die, cu); |
4d4eaa30 | 21827 | sym->compute_and_set_names (linkagename, false, objfile->per_bfd); |
c906108c | 21828 | |
f55ee35c JK |
21829 | /* Fortran does not have mangling standard and the mangling does differ |
21830 | between gfortran, iFort etc. */ | |
21831 | if (cu->language == language_fortran | |
468c0cbb CB |
21832 | && symbol_get_demangled_name (sym) == NULL) |
21833 | symbol_set_demangled_name (sym, | |
cfc594ee | 21834 | dwarf2_full_name (name, die, cu), |
29df156d | 21835 | NULL); |
f55ee35c | 21836 | |
c906108c | 21837 | /* Default assumptions. |
c5aa993b | 21838 | Use the passed type or decode it from the die. */ |
176620f1 | 21839 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21840 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21841 | if (type != NULL) |
21842 | SYMBOL_TYPE (sym) = type; | |
21843 | else | |
e7c27a73 | 21844 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21845 | attr = dwarf2_attr (die, |
21846 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21847 | cu); | |
435d3d88 | 21848 | if (attr != nullptr) |
c906108c SS |
21849 | { |
21850 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
21851 | } | |
cb1df416 | 21852 | |
edb3359d DJ |
21853 | attr = dwarf2_attr (die, |
21854 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21855 | cu); | |
435d3d88 | 21856 | if (attr != nullptr) |
cb1df416 | 21857 | { |
ecfb656c | 21858 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 21859 | struct file_entry *fe; |
9a619af0 | 21860 | |
ecfb656c PA |
21861 | if (cu->line_header != NULL) |
21862 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21863 | else |
21864 | fe = NULL; | |
21865 | ||
21866 | if (fe == NULL) | |
b98664d3 | 21867 | complaint (_("file index out of range")); |
8c43009f PA |
21868 | else |
21869 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21870 | } |
21871 | ||
c906108c SS |
21872 | switch (die->tag) |
21873 | { | |
21874 | case DW_TAG_label: | |
e142c38c | 21875 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 21876 | if (attr != nullptr) |
3e29f34a MR |
21877 | { |
21878 | CORE_ADDR addr; | |
21879 | ||
21880 | addr = attr_value_as_address (attr); | |
21881 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); | |
38583298 | 21882 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
3e29f34a | 21883 | } |
0f5238ed TT |
21884 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21885 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 21886 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 21887 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21888 | break; |
21889 | case DW_TAG_subprogram: | |
21890 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21891 | finish_block. */ | |
f1e6e072 | 21892 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21893 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d | 21894 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
0a4b0913 AB |
21895 | || cu->language == language_ada |
21896 | || cu->language == language_fortran) | |
c906108c | 21897 | { |
2cfa0c8d | 21898 | /* Subprograms marked external are stored as a global symbol. |
0a4b0913 AB |
21899 | Ada and Fortran subprograms, whether marked external or |
21900 | not, are always stored as a global symbol, because we want | |
21901 | to be able to access them globally. For instance, we want | |
21902 | to be able to break on a nested subprogram without having | |
21903 | to specify the context. */ | |
c24bdb02 | 21904 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
21905 | } |
21906 | else | |
21907 | { | |
e37fd15a | 21908 | list_to_add = cu->list_in_scope; |
c906108c SS |
21909 | } |
21910 | break; | |
edb3359d DJ |
21911 | case DW_TAG_inlined_subroutine: |
21912 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21913 | finish_block. */ | |
f1e6e072 | 21914 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21915 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21916 | list_to_add = cu->list_in_scope; |
edb3359d | 21917 | break; |
34eaf542 TT |
21918 | case DW_TAG_template_value_param: |
21919 | suppress_add = 1; | |
21920 | /* Fall through. */ | |
72929c62 | 21921 | case DW_TAG_constant: |
c906108c | 21922 | case DW_TAG_variable: |
254e6b9e | 21923 | case DW_TAG_member: |
0963b4bd MS |
21924 | /* Compilation with minimal debug info may result in |
21925 | variables with missing type entries. Change the | |
21926 | misleading `void' type to something sensible. */ | |
c906108c | 21927 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 21928 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21929 | |
e142c38c | 21930 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21931 | /* In the case of DW_TAG_member, we should only be called for |
21932 | static const members. */ | |
21933 | if (die->tag == DW_TAG_member) | |
21934 | { | |
3863f96c DE |
21935 | /* dwarf2_add_field uses die_is_declaration, |
21936 | so we do the same. */ | |
254e6b9e DE |
21937 | gdb_assert (die_is_declaration (die, cu)); |
21938 | gdb_assert (attr); | |
21939 | } | |
435d3d88 | 21940 | if (attr != nullptr) |
c906108c | 21941 | { |
e7c27a73 | 21942 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21943 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21944 | if (!suppress_add) |
34eaf542 TT |
21945 | { |
21946 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 21947 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 21948 | else |
e37fd15a | 21949 | list_to_add = cu->list_in_scope; |
34eaf542 | 21950 | } |
c906108c SS |
21951 | break; |
21952 | } | |
e142c38c | 21953 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 21954 | if (attr != nullptr) |
c906108c | 21955 | { |
e7c27a73 | 21956 | var_decode_location (attr, sym, cu); |
e142c38c | 21957 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21958 | |
21959 | /* Fortran explicitly imports any global symbols to the local | |
21960 | scope by DW_TAG_common_block. */ | |
21961 | if (cu->language == language_fortran && die->parent | |
21962 | && die->parent->tag == DW_TAG_common_block) | |
21963 | attr2 = NULL; | |
21964 | ||
caac4577 JG |
21965 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21966 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
21967 | && !dwarf2_per_objfile->has_section_at_zero) | |
21968 | { | |
21969 | /* When a static variable is eliminated by the linker, | |
21970 | the corresponding debug information is not stripped | |
21971 | out, but the variable address is set to null; | |
21972 | do not add such variables into symbol table. */ | |
21973 | } | |
21974 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 21975 | { |
4b610737 TT |
21976 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21977 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
21978 | && dwarf2_per_objfile->can_copy) | |
21979 | { | |
21980 | /* A global static variable might be subject to | |
21981 | copy relocation. We first check for a local | |
21982 | minsym, though, because maybe the symbol was | |
21983 | marked hidden, in which case this would not | |
21984 | apply. */ | |
21985 | bound_minimal_symbol found | |
21986 | = (lookup_minimal_symbol_linkage | |
987012b8 | 21987 | (sym->linkage_name (), objfile)); |
4b610737 TT |
21988 | if (found.minsym != nullptr) |
21989 | sym->maybe_copied = 1; | |
21990 | } | |
f55ee35c | 21991 | |
1c809c68 TT |
21992 | /* A variable with DW_AT_external is never static, |
21993 | but it may be block-scoped. */ | |
804d2729 | 21994 | list_to_add |
c24bdb02 KS |
21995 | = ((cu->list_in_scope |
21996 | == cu->get_builder ()->get_file_symbols ()) | |
21997 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21998 | : cu->list_in_scope); |
1c809c68 | 21999 | } |
c906108c | 22000 | else |
e37fd15a | 22001 | list_to_add = cu->list_in_scope; |
c906108c SS |
22002 | } |
22003 | else | |
22004 | { | |
22005 | /* We do not know the address of this symbol. | |
c5aa993b JM |
22006 | If it is an external symbol and we have type information |
22007 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
22008 | The address of the variable will then be determined from | |
22009 | the minimal symbol table whenever the variable is | |
22010 | referenced. */ | |
e142c38c | 22011 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
22012 | |
22013 | /* Fortran explicitly imports any global symbols to the local | |
22014 | scope by DW_TAG_common_block. */ | |
22015 | if (cu->language == language_fortran && die->parent | |
22016 | && die->parent->tag == DW_TAG_common_block) | |
22017 | { | |
22018 | /* SYMBOL_CLASS doesn't matter here because | |
22019 | read_common_block is going to reset it. */ | |
22020 | if (!suppress_add) | |
22021 | list_to_add = cu->list_in_scope; | |
22022 | } | |
22023 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
22024 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 22025 | { |
0fe7935b DJ |
22026 | /* A variable with DW_AT_external is never static, but it |
22027 | may be block-scoped. */ | |
804d2729 | 22028 | list_to_add |
c24bdb02 KS |
22029 | = ((cu->list_in_scope |
22030 | == cu->get_builder ()->get_file_symbols ()) | |
22031 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 22032 | : cu->list_in_scope); |
0fe7935b | 22033 | |
f1e6e072 | 22034 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 22035 | } |
442ddf59 JK |
22036 | else if (!die_is_declaration (die, cu)) |
22037 | { | |
22038 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
22039 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
22040 | if (!suppress_add) |
22041 | list_to_add = cu->list_in_scope; | |
442ddf59 | 22042 | } |
c906108c SS |
22043 | } |
22044 | break; | |
22045 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
22046 | { |
22047 | /* If we are inside a function, mark this as an argument. If | |
22048 | not, we might be looking at an argument to an inlined function | |
22049 | when we do not have enough information to show inlined frames; | |
22050 | pretend it's a local variable in that case so that the user can | |
22051 | still see it. */ | |
804d2729 | 22052 | struct context_stack *curr |
c24bdb02 | 22053 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
22054 | if (curr != nullptr && curr->name != nullptr) |
22055 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
22056 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 22057 | if (attr != nullptr) |
a60f3166 TT |
22058 | { |
22059 | var_decode_location (attr, sym, cu); | |
22060 | } | |
22061 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 22062 | if (attr != nullptr) |
a60f3166 TT |
22063 | { |
22064 | dwarf2_const_value (attr, sym, cu); | |
22065 | } | |
f346a30d | 22066 | |
a60f3166 TT |
22067 | list_to_add = cu->list_in_scope; |
22068 | } | |
c906108c SS |
22069 | break; |
22070 | case DW_TAG_unspecified_parameters: | |
22071 | /* From varargs functions; gdb doesn't seem to have any | |
22072 | interest in this information, so just ignore it for now. | |
22073 | (FIXME?) */ | |
22074 | break; | |
34eaf542 TT |
22075 | case DW_TAG_template_type_param: |
22076 | suppress_add = 1; | |
22077 | /* Fall through. */ | |
c906108c | 22078 | case DW_TAG_class_type: |
680b30c7 | 22079 | case DW_TAG_interface_type: |
c906108c SS |
22080 | case DW_TAG_structure_type: |
22081 | case DW_TAG_union_type: | |
72019c9c | 22082 | case DW_TAG_set_type: |
c906108c | 22083 | case DW_TAG_enumeration_type: |
f1e6e072 | 22084 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 22085 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 22086 | |
63d06c5c | 22087 | { |
9c37b5ae | 22088 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
22089 | really ever be static objects: otherwise, if you try |
22090 | to, say, break of a class's method and you're in a file | |
22091 | which doesn't mention that class, it won't work unless | |
22092 | the check for all static symbols in lookup_symbol_aux | |
22093 | saves you. See the OtherFileClass tests in | |
22094 | gdb.c++/namespace.exp. */ | |
22095 | ||
e37fd15a | 22096 | if (!suppress_add) |
34eaf542 | 22097 | { |
c24bdb02 | 22098 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 22099 | list_to_add |
c24bdb02 | 22100 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 22101 | && cu->language == language_cplus |
c24bdb02 | 22102 | ? builder->get_global_symbols () |
804d2729 | 22103 | : cu->list_in_scope); |
63d06c5c | 22104 | |
64382290 | 22105 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 22106 | ... }" also defines a typedef for "foo". */ |
64382290 | 22107 | if (cu->language == language_cplus |
45280282 | 22108 | || cu->language == language_ada |
c44af4eb TT |
22109 | || cu->language == language_d |
22110 | || cu->language == language_rust) | |
64382290 TT |
22111 | { |
22112 | /* The symbol's name is already allocated along | |
22113 | with this objfile, so we don't need to | |
22114 | duplicate it for the type. */ | |
22115 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
987012b8 | 22116 | TYPE_NAME (SYMBOL_TYPE (sym)) = sym->search_name (); |
64382290 | 22117 | } |
63d06c5c DC |
22118 | } |
22119 | } | |
c906108c SS |
22120 | break; |
22121 | case DW_TAG_typedef: | |
f1e6e072 | 22122 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 22123 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 22124 | list_to_add = cu->list_in_scope; |
63d06c5c | 22125 | break; |
c906108c | 22126 | case DW_TAG_base_type: |
a02abb62 | 22127 | case DW_TAG_subrange_type: |
f1e6e072 | 22128 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 22129 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 22130 | list_to_add = cu->list_in_scope; |
c906108c SS |
22131 | break; |
22132 | case DW_TAG_enumerator: | |
e142c38c | 22133 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 22134 | if (attr != nullptr) |
c906108c | 22135 | { |
e7c27a73 | 22136 | dwarf2_const_value (attr, sym, cu); |
c906108c | 22137 | } |
63d06c5c DC |
22138 | { |
22139 | /* NOTE: carlton/2003-11-10: See comment above in the | |
22140 | DW_TAG_class_type, etc. block. */ | |
22141 | ||
804d2729 | 22142 | list_to_add |
c24bdb02 | 22143 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 22144 | && cu->language == language_cplus |
c24bdb02 | 22145 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 22146 | : cu->list_in_scope); |
63d06c5c | 22147 | } |
c906108c | 22148 | break; |
74921315 | 22149 | case DW_TAG_imported_declaration: |
5c4e30ca | 22150 | case DW_TAG_namespace: |
f1e6e072 | 22151 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 22152 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 22153 | break; |
530e8392 KB |
22154 | case DW_TAG_module: |
22155 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
22156 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 22157 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 22158 | break; |
4357ac6c | 22159 | case DW_TAG_common_block: |
f1e6e072 | 22160 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 22161 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 22162 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 22163 | break; |
c906108c SS |
22164 | default: |
22165 | /* Not a tag we recognize. Hopefully we aren't processing | |
22166 | trash data, but since we must specifically ignore things | |
22167 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 22168 | this point. */ |
b98664d3 | 22169 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 22170 | dwarf_tag_name (die->tag)); |
c906108c SS |
22171 | break; |
22172 | } | |
df8a16a1 | 22173 | |
e37fd15a SW |
22174 | if (suppress_add) |
22175 | { | |
22176 | sym->hash_next = objfile->template_symbols; | |
22177 | objfile->template_symbols = sym; | |
22178 | list_to_add = NULL; | |
22179 | } | |
22180 | ||
22181 | if (list_to_add != NULL) | |
d3cb6808 | 22182 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 22183 | |
df8a16a1 DJ |
22184 | /* For the benefit of old versions of GCC, check for anonymous |
22185 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 22186 | if (!cu->processing_has_namespace_info |
94af9270 | 22187 | && cu->language == language_cplus) |
c24bdb02 | 22188 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
22189 | } |
22190 | return (sym); | |
22191 | } | |
22192 | ||
98bfdba5 PA |
22193 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
22194 | zero-extend it as appropriate for the symbol's type. The DWARF | |
22195 | standard (v4) is not entirely clear about the meaning of using | |
22196 | DW_FORM_dataN for a constant with a signed type, where the type is | |
22197 | wider than the data. The conclusion of a discussion on the DWARF | |
22198 | list was that this is unspecified. We choose to always zero-extend | |
22199 | because that is the interpretation long in use by GCC. */ | |
c906108c | 22200 | |
98bfdba5 | 22201 | static gdb_byte * |
ff39bb5e | 22202 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 22203 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 22204 | { |
518817b3 | 22205 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
22206 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
22207 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
22208 | LONGEST l = DW_UNSND (attr); |
22209 | ||
22210 | if (bits < sizeof (*value) * 8) | |
22211 | { | |
22212 | l &= ((LONGEST) 1 << bits) - 1; | |
22213 | *value = l; | |
22214 | } | |
22215 | else if (bits == sizeof (*value) * 8) | |
22216 | *value = l; | |
22217 | else | |
22218 | { | |
224c3ddb | 22219 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
22220 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
22221 | return bytes; | |
22222 | } | |
22223 | ||
22224 | return NULL; | |
22225 | } | |
22226 | ||
22227 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
22228 | the value does not fit in *VALUE, set *BYTES - either already | |
22229 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
22230 | or, set *BATON, if we translated the constant to a location | |
22231 | expression. */ | |
22232 | ||
22233 | static void | |
ff39bb5e | 22234 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
22235 | const char *name, struct obstack *obstack, |
22236 | struct dwarf2_cu *cu, | |
d521ce57 | 22237 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
22238 | struct dwarf2_locexpr_baton **baton) |
22239 | { | |
518817b3 | 22240 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 22241 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 22242 | struct dwarf_block *blk; |
98bfdba5 PA |
22243 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
22244 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
22245 | ||
22246 | *value = 0; | |
22247 | *bytes = NULL; | |
22248 | *baton = NULL; | |
c906108c SS |
22249 | |
22250 | switch (attr->form) | |
22251 | { | |
22252 | case DW_FORM_addr: | |
336d760d | 22253 | case DW_FORM_addrx: |
3019eac3 | 22254 | case DW_FORM_GNU_addr_index: |
ac56253d | 22255 | { |
ac56253d TT |
22256 | gdb_byte *data; |
22257 | ||
98bfdba5 PA |
22258 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
22259 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 22260 | cu_header->addr_size, |
98bfdba5 | 22261 | TYPE_LENGTH (type)); |
ac56253d TT |
22262 | /* Symbols of this form are reasonably rare, so we just |
22263 | piggyback on the existing location code rather than writing | |
22264 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 22265 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
22266 | (*baton)->per_cu = cu->per_cu; |
22267 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 22268 | |
98bfdba5 | 22269 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 22270 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 22271 | (*baton)->data = data; |
ac56253d TT |
22272 | |
22273 | data[0] = DW_OP_addr; | |
22274 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
22275 | byte_order, DW_ADDR (attr)); | |
22276 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 22277 | } |
c906108c | 22278 | break; |
4ac36638 | 22279 | case DW_FORM_string: |
93b5768b | 22280 | case DW_FORM_strp: |
cf532bd1 | 22281 | case DW_FORM_strx: |
3019eac3 | 22282 | case DW_FORM_GNU_str_index: |
36586728 | 22283 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
22284 | /* DW_STRING is already allocated on the objfile obstack, point |
22285 | directly to it. */ | |
d521ce57 | 22286 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 22287 | break; |
c906108c SS |
22288 | case DW_FORM_block1: |
22289 | case DW_FORM_block2: | |
22290 | case DW_FORM_block4: | |
22291 | case DW_FORM_block: | |
2dc7f7b3 | 22292 | case DW_FORM_exprloc: |
0224619f | 22293 | case DW_FORM_data16: |
c906108c | 22294 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
22295 | if (TYPE_LENGTH (type) != blk->size) |
22296 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
22297 | TYPE_LENGTH (type)); | |
22298 | *bytes = blk->data; | |
c906108c | 22299 | break; |
2df3850c JM |
22300 | |
22301 | /* The DW_AT_const_value attributes are supposed to carry the | |
22302 | symbol's value "represented as it would be on the target | |
22303 | architecture." By the time we get here, it's already been | |
22304 | converted to host endianness, so we just need to sign- or | |
22305 | zero-extend it as appropriate. */ | |
22306 | case DW_FORM_data1: | |
3aef2284 | 22307 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 22308 | break; |
c906108c | 22309 | case DW_FORM_data2: |
3aef2284 | 22310 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 22311 | break; |
c906108c | 22312 | case DW_FORM_data4: |
3aef2284 | 22313 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 22314 | break; |
c906108c | 22315 | case DW_FORM_data8: |
3aef2284 | 22316 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
22317 | break; |
22318 | ||
c906108c | 22319 | case DW_FORM_sdata: |
663c44ac | 22320 | case DW_FORM_implicit_const: |
98bfdba5 | 22321 | *value = DW_SND (attr); |
2df3850c JM |
22322 | break; |
22323 | ||
c906108c | 22324 | case DW_FORM_udata: |
98bfdba5 | 22325 | *value = DW_UNSND (attr); |
c906108c | 22326 | break; |
2df3850c | 22327 | |
c906108c | 22328 | default: |
b98664d3 | 22329 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 22330 | dwarf_form_name (attr->form)); |
98bfdba5 | 22331 | *value = 0; |
c906108c SS |
22332 | break; |
22333 | } | |
22334 | } | |
22335 | ||
2df3850c | 22336 | |
98bfdba5 PA |
22337 | /* Copy constant value from an attribute to a symbol. */ |
22338 | ||
2df3850c | 22339 | static void |
ff39bb5e | 22340 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 22341 | struct dwarf2_cu *cu) |
2df3850c | 22342 | { |
518817b3 | 22343 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 22344 | LONGEST value; |
d521ce57 | 22345 | const gdb_byte *bytes; |
98bfdba5 | 22346 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 22347 | |
98bfdba5 | 22348 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 22349 | sym->print_name (), |
98bfdba5 PA |
22350 | &objfile->objfile_obstack, cu, |
22351 | &value, &bytes, &baton); | |
2df3850c | 22352 | |
98bfdba5 PA |
22353 | if (baton != NULL) |
22354 | { | |
98bfdba5 | 22355 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 22356 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
22357 | } |
22358 | else if (bytes != NULL) | |
22359 | { | |
22360 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 22361 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
22362 | } |
22363 | else | |
22364 | { | |
22365 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 22366 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 22367 | } |
2df3850c JM |
22368 | } |
22369 | ||
c906108c SS |
22370 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
22371 | ||
22372 | static struct type * | |
e7c27a73 | 22373 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22374 | { |
c906108c | 22375 | struct attribute *type_attr; |
c906108c | 22376 | |
e142c38c | 22377 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
22378 | if (!type_attr) |
22379 | { | |
518817b3 | 22380 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 22381 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 22382 | return objfile_type (objfile)->builtin_void; |
c906108c | 22383 | } |
348e048f | 22384 | |
673bfd45 | 22385 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22386 | } |
22387 | ||
b4ba55a1 JB |
22388 | /* True iff CU's producer generates GNAT Ada auxiliary information |
22389 | that allows to find parallel types through that information instead | |
22390 | of having to do expensive parallel lookups by type name. */ | |
22391 | ||
22392 | static int | |
22393 | need_gnat_info (struct dwarf2_cu *cu) | |
22394 | { | |
de4cb04a JB |
22395 | /* Assume that the Ada compiler was GNAT, which always produces |
22396 | the auxiliary information. */ | |
22397 | return (cu->language == language_ada); | |
b4ba55a1 JB |
22398 | } |
22399 | ||
b4ba55a1 JB |
22400 | /* Return the auxiliary type of the die in question using its |
22401 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
22402 | attribute is not present. */ | |
22403 | ||
22404 | static struct type * | |
22405 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
22406 | { | |
b4ba55a1 | 22407 | struct attribute *type_attr; |
b4ba55a1 JB |
22408 | |
22409 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
22410 | if (!type_attr) | |
22411 | return NULL; | |
22412 | ||
673bfd45 | 22413 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
22414 | } |
22415 | ||
22416 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
22417 | descriptive type accordingly. */ | |
22418 | ||
22419 | static void | |
22420 | set_descriptive_type (struct type *type, struct die_info *die, | |
22421 | struct dwarf2_cu *cu) | |
22422 | { | |
22423 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
22424 | ||
22425 | if (descriptive_type) | |
22426 | { | |
22427 | ALLOCATE_GNAT_AUX_TYPE (type); | |
22428 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
22429 | } | |
22430 | } | |
22431 | ||
c906108c SS |
22432 | /* Return the containing type of the die in question using its |
22433 | DW_AT_containing_type attribute. */ | |
22434 | ||
22435 | static struct type * | |
e7c27a73 | 22436 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22437 | { |
c906108c | 22438 | struct attribute *type_attr; |
518817b3 | 22439 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 22440 | |
e142c38c | 22441 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
22442 | if (!type_attr) |
22443 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 22444 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 22445 | |
673bfd45 | 22446 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22447 | } |
22448 | ||
ac9ec31b DE |
22449 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
22450 | ||
22451 | static struct type * | |
22452 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
22453 | { | |
518817b3 SM |
22454 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22455 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 22456 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 22457 | char *saved; |
ac9ec31b | 22458 | |
528e1572 SM |
22459 | std::string message |
22460 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
22461 | objfile_name (objfile), | |
22462 | sect_offset_str (cu->header.sect_off), | |
22463 | sect_offset_str (die->sect_off)); | |
efba19b0 | 22464 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 22465 | |
19f392bc | 22466 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
22467 | } |
22468 | ||
673bfd45 | 22469 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
22470 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
22471 | DW_AT_containing_type. | |
673bfd45 DE |
22472 | If there is no type substitute an error marker. */ |
22473 | ||
c906108c | 22474 | static struct type * |
ff39bb5e | 22475 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 22476 | struct dwarf2_cu *cu) |
c906108c | 22477 | { |
518817b3 SM |
22478 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22479 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22480 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
22481 | struct type *this_type; |
22482 | ||
ac9ec31b DE |
22483 | gdb_assert (attr->name == DW_AT_type |
22484 | || attr->name == DW_AT_GNAT_descriptive_type | |
22485 | || attr->name == DW_AT_containing_type); | |
22486 | ||
673bfd45 DE |
22487 | /* First see if we have it cached. */ |
22488 | ||
36586728 TT |
22489 | if (attr->form == DW_FORM_GNU_ref_alt) |
22490 | { | |
22491 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 22492 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 22493 | |
ed2dc618 SM |
22494 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
22495 | dwarf2_per_objfile); | |
9c541725 | 22496 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 22497 | } |
7771576e | 22498 | else if (attr_form_is_ref (attr)) |
673bfd45 | 22499 | { |
9c541725 | 22500 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 22501 | |
9c541725 | 22502 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 22503 | } |
55f1336d | 22504 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 22505 | { |
ac9ec31b | 22506 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 22507 | |
ac9ec31b | 22508 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
22509 | } |
22510 | else | |
22511 | { | |
b98664d3 | 22512 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
22513 | " at %s [in module %s]"), |
22514 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 22515 | objfile_name (objfile)); |
ac9ec31b | 22516 | return build_error_marker_type (cu, die); |
673bfd45 DE |
22517 | } |
22518 | ||
22519 | /* If not cached we need to read it in. */ | |
22520 | ||
22521 | if (this_type == NULL) | |
22522 | { | |
ac9ec31b | 22523 | struct die_info *type_die = NULL; |
673bfd45 DE |
22524 | struct dwarf2_cu *type_cu = cu; |
22525 | ||
7771576e | 22526 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
22527 | type_die = follow_die_ref (die, attr, &type_cu); |
22528 | if (type_die == NULL) | |
22529 | return build_error_marker_type (cu, die); | |
22530 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
22531 | from an inter-CU reference and the type's CU got expanded before |
22532 | ours. */ | |
ac9ec31b | 22533 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
22534 | } |
22535 | ||
22536 | /* If we still don't have a type use an error marker. */ | |
22537 | ||
22538 | if (this_type == NULL) | |
ac9ec31b | 22539 | return build_error_marker_type (cu, die); |
673bfd45 | 22540 | |
f792889a | 22541 | return this_type; |
c906108c SS |
22542 | } |
22543 | ||
673bfd45 DE |
22544 | /* Return the type in DIE, CU. |
22545 | Returns NULL for invalid types. | |
22546 | ||
02142a6c | 22547 | This first does a lookup in die_type_hash, |
673bfd45 DE |
22548 | and only reads the die in if necessary. |
22549 | ||
22550 | NOTE: This can be called when reading in partial or full symbols. */ | |
22551 | ||
f792889a | 22552 | static struct type * |
e7c27a73 | 22553 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22554 | { |
f792889a DJ |
22555 | struct type *this_type; |
22556 | ||
22557 | this_type = get_die_type (die, cu); | |
22558 | if (this_type) | |
22559 | return this_type; | |
22560 | ||
673bfd45 DE |
22561 | return read_type_die_1 (die, cu); |
22562 | } | |
22563 | ||
22564 | /* Read the type in DIE, CU. | |
22565 | Returns NULL for invalid types. */ | |
22566 | ||
22567 | static struct type * | |
22568 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
22569 | { | |
22570 | struct type *this_type = NULL; | |
22571 | ||
c906108c SS |
22572 | switch (die->tag) |
22573 | { | |
22574 | case DW_TAG_class_type: | |
680b30c7 | 22575 | case DW_TAG_interface_type: |
c906108c SS |
22576 | case DW_TAG_structure_type: |
22577 | case DW_TAG_union_type: | |
f792889a | 22578 | this_type = read_structure_type (die, cu); |
c906108c SS |
22579 | break; |
22580 | case DW_TAG_enumeration_type: | |
f792889a | 22581 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
22582 | break; |
22583 | case DW_TAG_subprogram: | |
22584 | case DW_TAG_subroutine_type: | |
edb3359d | 22585 | case DW_TAG_inlined_subroutine: |
f792889a | 22586 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
22587 | break; |
22588 | case DW_TAG_array_type: | |
f792889a | 22589 | this_type = read_array_type (die, cu); |
c906108c | 22590 | break; |
72019c9c | 22591 | case DW_TAG_set_type: |
f792889a | 22592 | this_type = read_set_type (die, cu); |
72019c9c | 22593 | break; |
c906108c | 22594 | case DW_TAG_pointer_type: |
f792889a | 22595 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
22596 | break; |
22597 | case DW_TAG_ptr_to_member_type: | |
f792889a | 22598 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
22599 | break; |
22600 | case DW_TAG_reference_type: | |
4297a3f0 AV |
22601 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
22602 | break; | |
22603 | case DW_TAG_rvalue_reference_type: | |
22604 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
22605 | break; |
22606 | case DW_TAG_const_type: | |
f792889a | 22607 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
22608 | break; |
22609 | case DW_TAG_volatile_type: | |
f792889a | 22610 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 22611 | break; |
06d66ee9 TT |
22612 | case DW_TAG_restrict_type: |
22613 | this_type = read_tag_restrict_type (die, cu); | |
22614 | break; | |
c906108c | 22615 | case DW_TAG_string_type: |
f792889a | 22616 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
22617 | break; |
22618 | case DW_TAG_typedef: | |
f792889a | 22619 | this_type = read_typedef (die, cu); |
c906108c | 22620 | break; |
a02abb62 | 22621 | case DW_TAG_subrange_type: |
f792889a | 22622 | this_type = read_subrange_type (die, cu); |
a02abb62 | 22623 | break; |
c906108c | 22624 | case DW_TAG_base_type: |
f792889a | 22625 | this_type = read_base_type (die, cu); |
c906108c | 22626 | break; |
81a17f79 | 22627 | case DW_TAG_unspecified_type: |
f792889a | 22628 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 22629 | break; |
0114d602 DJ |
22630 | case DW_TAG_namespace: |
22631 | this_type = read_namespace_type (die, cu); | |
22632 | break; | |
f55ee35c JK |
22633 | case DW_TAG_module: |
22634 | this_type = read_module_type (die, cu); | |
22635 | break; | |
a2c2acaf MW |
22636 | case DW_TAG_atomic_type: |
22637 | this_type = read_tag_atomic_type (die, cu); | |
22638 | break; | |
c906108c | 22639 | default: |
b98664d3 | 22640 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 22641 | dwarf_tag_name (die->tag)); |
c906108c SS |
22642 | break; |
22643 | } | |
63d06c5c | 22644 | |
f792889a | 22645 | return this_type; |
63d06c5c DC |
22646 | } |
22647 | ||
abc72ce4 DE |
22648 | /* See if we can figure out if the class lives in a namespace. We do |
22649 | this by looking for a member function; its demangled name will | |
22650 | contain namespace info, if there is any. | |
22651 | Return the computed name or NULL. | |
22652 | Space for the result is allocated on the objfile's obstack. | |
22653 | This is the full-die version of guess_partial_die_structure_name. | |
22654 | In this case we know DIE has no useful parent. */ | |
22655 | ||
43816ebc | 22656 | static const char * |
abc72ce4 DE |
22657 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
22658 | { | |
22659 | struct die_info *spec_die; | |
22660 | struct dwarf2_cu *spec_cu; | |
22661 | struct die_info *child; | |
518817b3 | 22662 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
22663 | |
22664 | spec_cu = cu; | |
22665 | spec_die = die_specification (die, &spec_cu); | |
22666 | if (spec_die != NULL) | |
22667 | { | |
22668 | die = spec_die; | |
22669 | cu = spec_cu; | |
22670 | } | |
22671 | ||
22672 | for (child = die->child; | |
22673 | child != NULL; | |
22674 | child = child->sibling) | |
22675 | { | |
22676 | if (child->tag == DW_TAG_subprogram) | |
22677 | { | |
73b9be8b | 22678 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22679 | |
7d45c7c3 | 22680 | if (linkage_name != NULL) |
abc72ce4 | 22681 | { |
43816ebc TT |
22682 | gdb::unique_xmalloc_ptr<char> actual_name |
22683 | (language_class_name_from_physname (cu->language_defn, | |
22684 | linkage_name)); | |
22685 | const char *name = NULL; | |
abc72ce4 DE |
22686 | |
22687 | if (actual_name != NULL) | |
22688 | { | |
15d034d0 | 22689 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22690 | |
22691 | if (die_name != NULL | |
43816ebc | 22692 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
22693 | { |
22694 | /* Strip off the class name from the full name. | |
22695 | We want the prefix. */ | |
22696 | int die_name_len = strlen (die_name); | |
43816ebc TT |
22697 | int actual_name_len = strlen (actual_name.get ()); |
22698 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
22699 | |
22700 | /* Test for '::' as a sanity check. */ | |
22701 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 22702 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 22703 | name = obstack_strndup ( |
e3b94546 | 22704 | &objfile->per_bfd->storage_obstack, |
43816ebc | 22705 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
22706 | } |
22707 | } | |
abc72ce4 DE |
22708 | return name; |
22709 | } | |
22710 | } | |
22711 | } | |
22712 | ||
22713 | return NULL; | |
22714 | } | |
22715 | ||
96408a79 SA |
22716 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22717 | prefix part in such case. See | |
22718 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22719 | ||
a121b7c1 | 22720 | static const char * |
96408a79 SA |
22721 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22722 | { | |
22723 | struct attribute *attr; | |
e6a959d6 | 22724 | const char *base; |
96408a79 SA |
22725 | |
22726 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22727 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22728 | return NULL; | |
22729 | ||
7d45c7c3 | 22730 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22731 | return NULL; |
22732 | ||
73b9be8b | 22733 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
22734 | if (attr == NULL || DW_STRING (attr) == NULL) |
22735 | return NULL; | |
22736 | ||
22737 | /* dwarf2_name had to be already called. */ | |
22738 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
22739 | ||
22740 | /* Strip the base name, keep any leading namespaces/classes. */ | |
22741 | base = strrchr (DW_STRING (attr), ':'); | |
22742 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
22743 | return ""; | |
22744 | ||
518817b3 | 22745 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
22746 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
22747 | DW_STRING (attr), | |
22748 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
22749 | } |
22750 | ||
fdde2d81 | 22751 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22752 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22753 | |
0114d602 DJ |
22754 | For example, if we're within the method foo() in the following |
22755 | code: | |
22756 | ||
22757 | namespace N { | |
22758 | class C { | |
22759 | void foo () { | |
22760 | } | |
22761 | }; | |
22762 | } | |
22763 | ||
22764 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22765 | |
0d5cff50 | 22766 | static const char * |
e142c38c | 22767 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22768 | { |
518817b3 SM |
22769 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22770 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
22771 | struct die_info *parent, *spec_die; |
22772 | struct dwarf2_cu *spec_cu; | |
22773 | struct type *parent_type; | |
a121b7c1 | 22774 | const char *retval; |
63d06c5c | 22775 | |
9c37b5ae | 22776 | if (cu->language != language_cplus |
c44af4eb TT |
22777 | && cu->language != language_fortran && cu->language != language_d |
22778 | && cu->language != language_rust) | |
0114d602 DJ |
22779 | return ""; |
22780 | ||
96408a79 SA |
22781 | retval = anonymous_struct_prefix (die, cu); |
22782 | if (retval) | |
22783 | return retval; | |
22784 | ||
0114d602 DJ |
22785 | /* We have to be careful in the presence of DW_AT_specification. |
22786 | For example, with GCC 3.4, given the code | |
22787 | ||
22788 | namespace N { | |
22789 | void foo() { | |
22790 | // Definition of N::foo. | |
22791 | } | |
22792 | } | |
22793 | ||
22794 | then we'll have a tree of DIEs like this: | |
22795 | ||
22796 | 1: DW_TAG_compile_unit | |
22797 | 2: DW_TAG_namespace // N | |
22798 | 3: DW_TAG_subprogram // declaration of N::foo | |
22799 | 4: DW_TAG_subprogram // definition of N::foo | |
22800 | DW_AT_specification // refers to die #3 | |
22801 | ||
22802 | Thus, when processing die #4, we have to pretend that we're in | |
22803 | the context of its DW_AT_specification, namely the contex of die | |
22804 | #3. */ | |
22805 | spec_cu = cu; | |
22806 | spec_die = die_specification (die, &spec_cu); | |
22807 | if (spec_die == NULL) | |
22808 | parent = die->parent; | |
22809 | else | |
63d06c5c | 22810 | { |
0114d602 DJ |
22811 | parent = spec_die->parent; |
22812 | cu = spec_cu; | |
63d06c5c | 22813 | } |
0114d602 DJ |
22814 | |
22815 | if (parent == NULL) | |
22816 | return ""; | |
98bfdba5 PA |
22817 | else if (parent->building_fullname) |
22818 | { | |
22819 | const char *name; | |
22820 | const char *parent_name; | |
22821 | ||
22822 | /* It has been seen on RealView 2.2 built binaries, | |
22823 | DW_TAG_template_type_param types actually _defined_ as | |
22824 | children of the parent class: | |
22825 | ||
22826 | enum E {}; | |
22827 | template class <class Enum> Class{}; | |
22828 | Class<enum E> class_e; | |
22829 | ||
22830 | 1: DW_TAG_class_type (Class) | |
22831 | 2: DW_TAG_enumeration_type (E) | |
22832 | 3: DW_TAG_enumerator (enum1:0) | |
22833 | 3: DW_TAG_enumerator (enum2:1) | |
22834 | ... | |
22835 | 2: DW_TAG_template_type_param | |
22836 | DW_AT_type DW_FORM_ref_udata (E) | |
22837 | ||
22838 | Besides being broken debug info, it can put GDB into an | |
22839 | infinite loop. Consider: | |
22840 | ||
22841 | When we're building the full name for Class<E>, we'll start | |
22842 | at Class, and go look over its template type parameters, | |
22843 | finding E. We'll then try to build the full name of E, and | |
22844 | reach here. We're now trying to build the full name of E, | |
22845 | and look over the parent DIE for containing scope. In the | |
22846 | broken case, if we followed the parent DIE of E, we'd again | |
22847 | find Class, and once again go look at its template type | |
22848 | arguments, etc., etc. Simply don't consider such parent die | |
22849 | as source-level parent of this die (it can't be, the language | |
22850 | doesn't allow it), and break the loop here. */ | |
22851 | name = dwarf2_name (die, cu); | |
22852 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 22853 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
22854 | name ? name : "<unknown>", |
22855 | parent_name ? parent_name : "<unknown>"); | |
22856 | return ""; | |
22857 | } | |
63d06c5c | 22858 | else |
0114d602 DJ |
22859 | switch (parent->tag) |
22860 | { | |
63d06c5c | 22861 | case DW_TAG_namespace: |
0114d602 | 22862 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22863 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22864 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22865 | Work around this problem here. */ | |
22866 | if (cu->language == language_cplus | |
e86ca25f | 22867 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 22868 | return ""; |
0114d602 | 22869 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 22870 | return TYPE_NAME (parent_type); |
63d06c5c | 22871 | case DW_TAG_class_type: |
680b30c7 | 22872 | case DW_TAG_interface_type: |
63d06c5c | 22873 | case DW_TAG_structure_type: |
0114d602 | 22874 | case DW_TAG_union_type: |
f55ee35c | 22875 | case DW_TAG_module: |
0114d602 | 22876 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
22877 | if (TYPE_NAME (parent_type) != NULL) |
22878 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
22879 | else |
22880 | /* An anonymous structure is only allowed non-static data | |
22881 | members; no typedefs, no member functions, et cetera. | |
22882 | So it does not need a prefix. */ | |
22883 | return ""; | |
abc72ce4 | 22884 | case DW_TAG_compile_unit: |
95554aad | 22885 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22886 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22887 | if (cu->language == language_cplus | |
fd5866f6 | 22888 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
22889 | && die->child != NULL |
22890 | && (die->tag == DW_TAG_class_type | |
22891 | || die->tag == DW_TAG_structure_type | |
22892 | || die->tag == DW_TAG_union_type)) | |
22893 | { | |
43816ebc | 22894 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
22895 | if (name != NULL) |
22896 | return name; | |
22897 | } | |
22898 | return ""; | |
0a4b0913 AB |
22899 | case DW_TAG_subprogram: |
22900 | /* Nested subroutines in Fortran get a prefix with the name | |
22901 | of the parent's subroutine. */ | |
22902 | if (cu->language == language_fortran) | |
22903 | { | |
22904 | if ((die->tag == DW_TAG_subprogram) | |
22905 | && (dwarf2_name (parent, cu) != NULL)) | |
22906 | return dwarf2_name (parent, cu); | |
22907 | } | |
22908 | return determine_prefix (parent, cu); | |
3d567982 TT |
22909 | case DW_TAG_enumeration_type: |
22910 | parent_type = read_type_die (parent, cu); | |
22911 | if (TYPE_DECLARED_CLASS (parent_type)) | |
22912 | { | |
e86ca25f TT |
22913 | if (TYPE_NAME (parent_type) != NULL) |
22914 | return TYPE_NAME (parent_type); | |
3d567982 TT |
22915 | return ""; |
22916 | } | |
22917 | /* Fall through. */ | |
63d06c5c | 22918 | default: |
8176b9b8 | 22919 | return determine_prefix (parent, cu); |
63d06c5c | 22920 | } |
63d06c5c DC |
22921 | } |
22922 | ||
3e43a32a MS |
22923 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22924 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22925 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22926 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22927 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22928 | |
f55ee35c | 22929 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22930 | |
22931 | static char * | |
f55ee35c JK |
22932 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
22933 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 22934 | { |
f55ee35c | 22935 | const char *lead = ""; |
5c315b68 | 22936 | const char *sep; |
63d06c5c | 22937 | |
3e43a32a MS |
22938 | if (suffix == NULL || suffix[0] == '\0' |
22939 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22940 | sep = ""; |
45280282 IB |
22941 | else if (cu->language == language_d) |
22942 | { | |
22943 | /* For D, the 'main' function could be defined in any module, but it | |
22944 | should never be prefixed. */ | |
22945 | if (strcmp (suffix, "D main") == 0) | |
22946 | { | |
22947 | prefix = ""; | |
22948 | sep = ""; | |
22949 | } | |
22950 | else | |
22951 | sep = "."; | |
22952 | } | |
f55ee35c JK |
22953 | else if (cu->language == language_fortran && physname) |
22954 | { | |
22955 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22956 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22957 | ||
22958 | lead = "__"; | |
22959 | sep = "_MOD_"; | |
22960 | } | |
987504bb JJ |
22961 | else |
22962 | sep = "::"; | |
63d06c5c | 22963 | |
6dd47d34 DE |
22964 | if (prefix == NULL) |
22965 | prefix = ""; | |
22966 | if (suffix == NULL) | |
22967 | suffix = ""; | |
22968 | ||
987504bb JJ |
22969 | if (obs == NULL) |
22970 | { | |
3e43a32a | 22971 | char *retval |
224c3ddb SM |
22972 | = ((char *) |
22973 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22974 | |
f55ee35c JK |
22975 | strcpy (retval, lead); |
22976 | strcat (retval, prefix); | |
6dd47d34 DE |
22977 | strcat (retval, sep); |
22978 | strcat (retval, suffix); | |
63d06c5c DC |
22979 | return retval; |
22980 | } | |
987504bb JJ |
22981 | else |
22982 | { | |
22983 | /* We have an obstack. */ | |
f55ee35c | 22984 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22985 | } |
63d06c5c DC |
22986 | } |
22987 | ||
c906108c SS |
22988 | /* Return sibling of die, NULL if no sibling. */ |
22989 | ||
f9aca02d | 22990 | static struct die_info * |
fba45db2 | 22991 | sibling_die (struct die_info *die) |
c906108c | 22992 | { |
639d11d3 | 22993 | return die->sibling; |
c906108c SS |
22994 | } |
22995 | ||
71c25dea TT |
22996 | /* Get name of a die, return NULL if not found. */ |
22997 | ||
15d034d0 TT |
22998 | static const char * |
22999 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
71c25dea TT |
23000 | struct obstack *obstack) |
23001 | { | |
23002 | if (name && cu->language == language_cplus) | |
23003 | { | |
2f408ecb | 23004 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 23005 | |
2f408ecb | 23006 | if (!canon_name.empty ()) |
71c25dea | 23007 | { |
2f408ecb | 23008 | if (canon_name != name) |
efba19b0 | 23009 | name = obstack_strdup (obstack, canon_name); |
71c25dea TT |
23010 | } |
23011 | } | |
23012 | ||
23013 | return name; | |
c906108c SS |
23014 | } |
23015 | ||
96553a0c DE |
23016 | /* Get name of a die, return NULL if not found. |
23017 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 23018 | |
15d034d0 | 23019 | static const char * |
e142c38c | 23020 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
23021 | { |
23022 | struct attribute *attr; | |
518817b3 | 23023 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 23024 | |
e142c38c | 23025 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 23026 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 23027 | && die->tag != DW_TAG_namespace |
53832f31 TT |
23028 | && die->tag != DW_TAG_class_type |
23029 | && die->tag != DW_TAG_interface_type | |
23030 | && die->tag != DW_TAG_structure_type | |
23031 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
23032 | return NULL; |
23033 | ||
23034 | switch (die->tag) | |
23035 | { | |
23036 | case DW_TAG_compile_unit: | |
95554aad | 23037 | case DW_TAG_partial_unit: |
71c25dea TT |
23038 | /* Compilation units have a DW_AT_name that is a filename, not |
23039 | a source language identifier. */ | |
23040 | case DW_TAG_enumeration_type: | |
23041 | case DW_TAG_enumerator: | |
23042 | /* These tags always have simple identifiers already; no need | |
23043 | to canonicalize them. */ | |
23044 | return DW_STRING (attr); | |
907af001 | 23045 | |
96553a0c DE |
23046 | case DW_TAG_namespace: |
23047 | if (attr != NULL && DW_STRING (attr) != NULL) | |
23048 | return DW_STRING (attr); | |
23049 | return CP_ANONYMOUS_NAMESPACE_STR; | |
23050 | ||
907af001 UW |
23051 | case DW_TAG_class_type: |
23052 | case DW_TAG_interface_type: | |
23053 | case DW_TAG_structure_type: | |
23054 | case DW_TAG_union_type: | |
23055 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
23056 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
23057 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
23058 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 23059 | if (attr && DW_STRING (attr) |
61012eef GB |
23060 | && (startswith (DW_STRING (attr), "._") |
23061 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 23062 | return NULL; |
53832f31 TT |
23063 | |
23064 | /* GCC might emit a nameless typedef that has a linkage name. See | |
23065 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
23066 | if (!attr || DW_STRING (attr) == NULL) | |
23067 | { | |
73b9be8b | 23068 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
23069 | if (attr == NULL || DW_STRING (attr) == NULL) |
23070 | return NULL; | |
23071 | ||
df5c6c50 JK |
23072 | /* Avoid demangling DW_STRING (attr) the second time on a second |
23073 | call for the same DIE. */ | |
23074 | if (!DW_STRING_IS_CANONICAL (attr)) | |
53832f31 | 23075 | { |
43816ebc TT |
23076 | gdb::unique_xmalloc_ptr<char> demangled |
23077 | (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); | |
23078 | ||
e6a959d6 | 23079 | const char *base; |
96408a79 | 23080 | |
53832f31 | 23081 | /* FIXME: we already did this for the partial symbol... */ |
34a68019 | 23082 | DW_STRING (attr) |
021887d8 | 23083 | = obstack_strdup (&objfile->per_bfd->storage_obstack, |
43816ebc | 23084 | demangled.get ()); |
53832f31 | 23085 | DW_STRING_IS_CANONICAL (attr) = 1; |
96408a79 SA |
23086 | |
23087 | /* Strip any leading namespaces/classes, keep only the base name. | |
23088 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
23089 | base = strrchr (DW_STRING (attr), ':'); | |
23090 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
23091 | return &base[1]; | |
23092 | else | |
23093 | return DW_STRING (attr); | |
53832f31 TT |
23094 | } |
23095 | } | |
907af001 UW |
23096 | break; |
23097 | ||
71c25dea | 23098 | default: |
907af001 UW |
23099 | break; |
23100 | } | |
23101 | ||
23102 | if (!DW_STRING_IS_CANONICAL (attr)) | |
23103 | { | |
23104 | DW_STRING (attr) | |
23105 | = dwarf2_canonicalize_name (DW_STRING (attr), cu, | |
e3b94546 | 23106 | &objfile->per_bfd->storage_obstack); |
907af001 | 23107 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 23108 | } |
907af001 | 23109 | return DW_STRING (attr); |
9219021c DC |
23110 | } |
23111 | ||
23112 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
23113 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
23114 | containing the return value on output. */ | |
9219021c DC |
23115 | |
23116 | static struct die_info * | |
f2f0e013 | 23117 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
23118 | { |
23119 | struct attribute *attr; | |
9219021c | 23120 | |
f2f0e013 | 23121 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
23122 | if (attr == NULL) |
23123 | return NULL; | |
23124 | ||
f2f0e013 | 23125 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
23126 | } |
23127 | ||
fa9c3fa0 TT |
23128 | /* A convenience function that returns an "unknown" DWARF name, |
23129 | including the value of V. STR is the name of the entity being | |
23130 | printed, e.g., "TAG". */ | |
23131 | ||
23132 | static const char * | |
23133 | dwarf_unknown (const char *str, unsigned v) | |
23134 | { | |
23135 | char *cell = get_print_cell (); | |
23136 | xsnprintf (cell, PRINT_CELL_SIZE, "DW_%s_<unknown: %u>", str, v); | |
23137 | return cell; | |
23138 | } | |
23139 | ||
c906108c SS |
23140 | /* Convert a DIE tag into its string name. */ |
23141 | ||
f39c6ffd | 23142 | static const char * |
aa1ee363 | 23143 | dwarf_tag_name (unsigned tag) |
c906108c | 23144 | { |
f39c6ffd TT |
23145 | const char *name = get_DW_TAG_name (tag); |
23146 | ||
23147 | if (name == NULL) | |
fa9c3fa0 | 23148 | return dwarf_unknown ("TAG", tag); |
f39c6ffd TT |
23149 | |
23150 | return name; | |
c906108c SS |
23151 | } |
23152 | ||
23153 | /* Convert a DWARF attribute code into its string name. */ | |
23154 | ||
f39c6ffd | 23155 | static const char * |
aa1ee363 | 23156 | dwarf_attr_name (unsigned attr) |
c906108c | 23157 | { |
f39c6ffd TT |
23158 | const char *name; |
23159 | ||
c764a876 | 23160 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
23161 | if (attr == DW_AT_MIPS_fde) |
23162 | return "DW_AT_MIPS_fde"; | |
23163 | #else | |
23164 | if (attr == DW_AT_HP_block_index) | |
23165 | return "DW_AT_HP_block_index"; | |
c764a876 | 23166 | #endif |
f39c6ffd TT |
23167 | |
23168 | name = get_DW_AT_name (attr); | |
23169 | ||
23170 | if (name == NULL) | |
fa9c3fa0 | 23171 | return dwarf_unknown ("AT", attr); |
f39c6ffd TT |
23172 | |
23173 | return name; | |
c906108c SS |
23174 | } |
23175 | ||
a084a2a6 AT |
23176 | /* Convert a unit type to corresponding DW_UT name. */ |
23177 | ||
23178 | static const char * | |
23179 | dwarf_unit_type_name (int unit_type) { | |
23180 | switch (unit_type) | |
23181 | { | |
23182 | case 0x01: | |
23183 | return "DW_UT_compile (0x01)"; | |
23184 | case 0x02: | |
23185 | return "DW_UT_type (0x02)"; | |
23186 | case 0x03: | |
23187 | return "DW_UT_partial (0x03)"; | |
23188 | case 0x04: | |
23189 | return "DW_UT_skeleton (0x04)"; | |
23190 | case 0x05: | |
23191 | return "DW_UT_split_compile (0x05)"; | |
23192 | case 0x06: | |
23193 | return "DW_UT_split_type (0x06)"; | |
23194 | case 0x80: | |
23195 | return "DW_UT_lo_user (0x80)"; | |
23196 | case 0xff: | |
23197 | return "DW_UT_hi_user (0xff)"; | |
23198 | default: | |
23199 | return nullptr; | |
23200 | } | |
23201 | } | |
23202 | ||
c906108c SS |
23203 | /* Convert a DWARF value form code into its string name. */ |
23204 | ||
f39c6ffd | 23205 | static const char * |
aa1ee363 | 23206 | dwarf_form_name (unsigned form) |
c906108c | 23207 | { |
f39c6ffd TT |
23208 | const char *name = get_DW_FORM_name (form); |
23209 | ||
23210 | if (name == NULL) | |
fa9c3fa0 | 23211 | return dwarf_unknown ("FORM", form); |
f39c6ffd TT |
23212 | |
23213 | return name; | |
c906108c SS |
23214 | } |
23215 | ||
a121b7c1 | 23216 | static const char * |
fba45db2 | 23217 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
23218 | { |
23219 | if (mybool) | |
23220 | return "TRUE"; | |
23221 | else | |
23222 | return "FALSE"; | |
23223 | } | |
23224 | ||
23225 | /* Convert a DWARF type code into its string name. */ | |
23226 | ||
f39c6ffd | 23227 | static const char * |
aa1ee363 | 23228 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 23229 | { |
f39c6ffd | 23230 | const char *name = get_DW_ATE_name (enc); |
c906108c | 23231 | |
f39c6ffd | 23232 | if (name == NULL) |
fa9c3fa0 | 23233 | return dwarf_unknown ("ATE", enc); |
c906108c | 23234 | |
f39c6ffd | 23235 | return name; |
c906108c | 23236 | } |
c906108c | 23237 | |
f9aca02d | 23238 | static void |
d97bc12b | 23239 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
23240 | { |
23241 | unsigned int i; | |
23242 | ||
d97bc12b | 23243 | print_spaces (indent, f); |
9d8780f0 | 23244 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 23245 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 23246 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
23247 | |
23248 | if (die->parent != NULL) | |
23249 | { | |
23250 | print_spaces (indent, f); | |
9d8780f0 SM |
23251 | fprintf_unfiltered (f, " parent at offset: %s\n", |
23252 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
23253 | } |
23254 | ||
23255 | print_spaces (indent, f); | |
23256 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 23257 | dwarf_bool_name (die->child != NULL)); |
c906108c | 23258 | |
d97bc12b DE |
23259 | print_spaces (indent, f); |
23260 | fprintf_unfiltered (f, " attributes:\n"); | |
23261 | ||
c906108c SS |
23262 | for (i = 0; i < die->num_attrs; ++i) |
23263 | { | |
d97bc12b DE |
23264 | print_spaces (indent, f); |
23265 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
23266 | dwarf_attr_name (die->attrs[i].name), |
23267 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 23268 | |
c906108c SS |
23269 | switch (die->attrs[i].form) |
23270 | { | |
c906108c | 23271 | case DW_FORM_addr: |
336d760d | 23272 | case DW_FORM_addrx: |
3019eac3 | 23273 | case DW_FORM_GNU_addr_index: |
d97bc12b | 23274 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 23275 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
23276 | break; |
23277 | case DW_FORM_block2: | |
23278 | case DW_FORM_block4: | |
23279 | case DW_FORM_block: | |
23280 | case DW_FORM_block1: | |
56eb65bd SP |
23281 | fprintf_unfiltered (f, "block: size %s", |
23282 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 23283 | break; |
2dc7f7b3 | 23284 | case DW_FORM_exprloc: |
56eb65bd SP |
23285 | fprintf_unfiltered (f, "expression: size %s", |
23286 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 23287 | break; |
0224619f JK |
23288 | case DW_FORM_data16: |
23289 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
23290 | break; | |
4568ecf9 DE |
23291 | case DW_FORM_ref_addr: |
23292 | fprintf_unfiltered (f, "ref address: "); | |
23293 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
23294 | break; | |
36586728 TT |
23295 | case DW_FORM_GNU_ref_alt: |
23296 | fprintf_unfiltered (f, "alt ref address: "); | |
23297 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
23298 | break; | |
10b3939b DJ |
23299 | case DW_FORM_ref1: |
23300 | case DW_FORM_ref2: | |
23301 | case DW_FORM_ref4: | |
4568ecf9 DE |
23302 | case DW_FORM_ref8: |
23303 | case DW_FORM_ref_udata: | |
d97bc12b | 23304 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 23305 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 23306 | break; |
c906108c SS |
23307 | case DW_FORM_data1: |
23308 | case DW_FORM_data2: | |
23309 | case DW_FORM_data4: | |
ce5d95e1 | 23310 | case DW_FORM_data8: |
c906108c SS |
23311 | case DW_FORM_udata: |
23312 | case DW_FORM_sdata: | |
43bbcdc2 PH |
23313 | fprintf_unfiltered (f, "constant: %s", |
23314 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 23315 | break; |
2dc7f7b3 TT |
23316 | case DW_FORM_sec_offset: |
23317 | fprintf_unfiltered (f, "section offset: %s", | |
23318 | pulongest (DW_UNSND (&die->attrs[i]))); | |
23319 | break; | |
55f1336d | 23320 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
23321 | fprintf_unfiltered (f, "signature: %s", |
23322 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 23323 | break; |
c906108c | 23324 | case DW_FORM_string: |
4bdf3d34 | 23325 | case DW_FORM_strp: |
43988095 | 23326 | case DW_FORM_line_strp: |
cf532bd1 | 23327 | case DW_FORM_strx: |
3019eac3 | 23328 | case DW_FORM_GNU_str_index: |
36586728 | 23329 | case DW_FORM_GNU_strp_alt: |
8285870a | 23330 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 23331 | DW_STRING (&die->attrs[i]) |
8285870a JK |
23332 | ? DW_STRING (&die->attrs[i]) : "", |
23333 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
23334 | break; |
23335 | case DW_FORM_flag: | |
23336 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 23337 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 23338 | else |
d97bc12b | 23339 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 23340 | break; |
2dc7f7b3 TT |
23341 | case DW_FORM_flag_present: |
23342 | fprintf_unfiltered (f, "flag: TRUE"); | |
23343 | break; | |
a8329558 | 23344 | case DW_FORM_indirect: |
0963b4bd MS |
23345 | /* The reader will have reduced the indirect form to |
23346 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 23347 | fprintf_unfiltered (f, |
3e43a32a | 23348 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 23349 | break; |
663c44ac JK |
23350 | case DW_FORM_implicit_const: |
23351 | fprintf_unfiltered (f, "constant: %s", | |
23352 | plongest (DW_SND (&die->attrs[i]))); | |
23353 | break; | |
c906108c | 23354 | default: |
d97bc12b | 23355 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 23356 | die->attrs[i].form); |
d97bc12b | 23357 | break; |
c906108c | 23358 | } |
d97bc12b | 23359 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
23360 | } |
23361 | } | |
23362 | ||
f9aca02d | 23363 | static void |
d97bc12b | 23364 | dump_die_for_error (struct die_info *die) |
c906108c | 23365 | { |
d97bc12b DE |
23366 | dump_die_shallow (gdb_stderr, 0, die); |
23367 | } | |
23368 | ||
23369 | static void | |
23370 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
23371 | { | |
23372 | int indent = level * 4; | |
23373 | ||
23374 | gdb_assert (die != NULL); | |
23375 | ||
23376 | if (level >= max_level) | |
23377 | return; | |
23378 | ||
23379 | dump_die_shallow (f, indent, die); | |
23380 | ||
23381 | if (die->child != NULL) | |
c906108c | 23382 | { |
d97bc12b DE |
23383 | print_spaces (indent, f); |
23384 | fprintf_unfiltered (f, " Children:"); | |
23385 | if (level + 1 < max_level) | |
23386 | { | |
23387 | fprintf_unfiltered (f, "\n"); | |
23388 | dump_die_1 (f, level + 1, max_level, die->child); | |
23389 | } | |
23390 | else | |
23391 | { | |
3e43a32a MS |
23392 | fprintf_unfiltered (f, |
23393 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
23394 | } |
23395 | } | |
23396 | ||
23397 | if (die->sibling != NULL && level > 0) | |
23398 | { | |
23399 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
23400 | } |
23401 | } | |
23402 | ||
d97bc12b DE |
23403 | /* This is called from the pdie macro in gdbinit.in. |
23404 | It's not static so gcc will keep a copy callable from gdb. */ | |
23405 | ||
23406 | void | |
23407 | dump_die (struct die_info *die, int max_level) | |
23408 | { | |
23409 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
23410 | } | |
23411 | ||
f9aca02d | 23412 | static void |
51545339 | 23413 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 23414 | { |
51545339 | 23415 | void **slot; |
c906108c | 23416 | |
9c541725 PA |
23417 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
23418 | to_underlying (die->sect_off), | |
b64f50a1 | 23419 | INSERT); |
51545339 DJ |
23420 | |
23421 | *slot = die; | |
c906108c SS |
23422 | } |
23423 | ||
b64f50a1 JK |
23424 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
23425 | required kind. */ | |
23426 | ||
23427 | static sect_offset | |
ff39bb5e | 23428 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 23429 | { |
7771576e | 23430 | if (attr_form_is_ref (attr)) |
9c541725 | 23431 | return (sect_offset) DW_UNSND (attr); |
93311388 | 23432 | |
b98664d3 | 23433 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 23434 | dwarf_form_name (attr->form)); |
9c541725 | 23435 | return {}; |
c906108c SS |
23436 | } |
23437 | ||
43bbcdc2 PH |
23438 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
23439 | * the value held by the attribute is not constant. */ | |
a02abb62 | 23440 | |
43bbcdc2 | 23441 | static LONGEST |
ff39bb5e | 23442 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 23443 | { |
663c44ac | 23444 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
23445 | return DW_SND (attr); |
23446 | else if (attr->form == DW_FORM_udata | |
23447 | || attr->form == DW_FORM_data1 | |
23448 | || attr->form == DW_FORM_data2 | |
23449 | || attr->form == DW_FORM_data4 | |
23450 | || attr->form == DW_FORM_data8) | |
23451 | return DW_UNSND (attr); | |
23452 | else | |
23453 | { | |
0224619f | 23454 | /* For DW_FORM_data16 see attr_form_is_constant. */ |
b98664d3 | 23455 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
23456 | dwarf_form_name (attr->form)); |
23457 | return default_value; | |
23458 | } | |
23459 | } | |
23460 | ||
348e048f DE |
23461 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
23462 | On entry *REF_CU is the CU of SRC_DIE. | |
23463 | On exit *REF_CU is the CU of the result. */ | |
23464 | ||
23465 | static struct die_info * | |
ff39bb5e | 23466 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
23467 | struct dwarf2_cu **ref_cu) |
23468 | { | |
23469 | struct die_info *die; | |
23470 | ||
7771576e | 23471 | if (attr_form_is_ref (attr)) |
348e048f | 23472 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 23473 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
23474 | die = follow_die_sig (src_die, attr, ref_cu); |
23475 | else | |
23476 | { | |
23477 | dump_die_for_error (src_die); | |
23478 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 23479 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
23480 | } |
23481 | ||
23482 | return die; | |
03dd20cc DJ |
23483 | } |
23484 | ||
5c631832 | 23485 | /* Follow reference OFFSET. |
673bfd45 DE |
23486 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
23487 | On exit *REF_CU is the CU of the result. | |
23488 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 23489 | |
f9aca02d | 23490 | static struct die_info * |
9c541725 | 23491 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 23492 | struct dwarf2_cu **ref_cu) |
c906108c | 23493 | { |
10b3939b | 23494 | struct die_info temp_die; |
f2f0e013 | 23495 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
23496 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23497 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 23498 | |
348e048f DE |
23499 | gdb_assert (cu->per_cu != NULL); |
23500 | ||
98bfdba5 PA |
23501 | target_cu = cu; |
23502 | ||
3019eac3 | 23503 | if (cu->per_cu->is_debug_types) |
348e048f DE |
23504 | { |
23505 | /* .debug_types CUs cannot reference anything outside their CU. | |
23506 | If they need to, they have to reference a signatured type via | |
55f1336d | 23507 | DW_FORM_ref_sig8. */ |
9c541725 | 23508 | if (!offset_in_cu_p (&cu->header, sect_off)) |
5c631832 | 23509 | return NULL; |
348e048f | 23510 | } |
36586728 | 23511 | else if (offset_in_dwz != cu->per_cu->is_dwz |
9c541725 | 23512 | || !offset_in_cu_p (&cu->header, sect_off)) |
10b3939b DJ |
23513 | { |
23514 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 23515 | |
9c541725 | 23516 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 23517 | dwarf2_per_objfile); |
03dd20cc DJ |
23518 | |
23519 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 23520 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 23521 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 23522 | |
10b3939b DJ |
23523 | target_cu = per_cu->cu; |
23524 | } | |
98bfdba5 PA |
23525 | else if (cu->dies == NULL) |
23526 | { | |
23527 | /* We're loading full DIEs during partial symbol reading. */ | |
23528 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 23529 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 23530 | } |
c906108c | 23531 | |
f2f0e013 | 23532 | *ref_cu = target_cu; |
9c541725 | 23533 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
23534 | |
23535 | if (target_cu != cu) | |
23536 | target_cu->ancestor = cu; | |
23537 | ||
9a3c8263 | 23538 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
23539 | &temp_die, |
23540 | to_underlying (sect_off)); | |
5c631832 | 23541 | } |
10b3939b | 23542 | |
5c631832 JK |
23543 | /* Follow reference attribute ATTR of SRC_DIE. |
23544 | On entry *REF_CU is the CU of SRC_DIE. | |
23545 | On exit *REF_CU is the CU of the result. */ | |
23546 | ||
23547 | static struct die_info * | |
ff39bb5e | 23548 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
23549 | struct dwarf2_cu **ref_cu) |
23550 | { | |
9c541725 | 23551 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
23552 | struct dwarf2_cu *cu = *ref_cu; |
23553 | struct die_info *die; | |
23554 | ||
9c541725 | 23555 | die = follow_die_offset (sect_off, |
36586728 TT |
23556 | (attr->form == DW_FORM_GNU_ref_alt |
23557 | || cu->per_cu->is_dwz), | |
23558 | ref_cu); | |
5c631832 | 23559 | if (!die) |
9d8780f0 SM |
23560 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
23561 | "at %s [in module %s]"), | |
23562 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 23563 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 23564 | |
5c631832 JK |
23565 | return die; |
23566 | } | |
23567 | ||
9c541725 | 23568 | /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU. |
d83e736b | 23569 | Returned value is intended for DW_OP_call*. Returned |
e3b94546 SM |
23570 | dwarf2_locexpr_baton->data has lifetime of |
23571 | PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */ | |
5c631832 JK |
23572 | |
23573 | struct dwarf2_locexpr_baton | |
9c541725 | 23574 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
8b9737bf TT |
23575 | struct dwarf2_per_cu_data *per_cu, |
23576 | CORE_ADDR (*get_frame_pc) (void *baton), | |
e4a62c65 | 23577 | void *baton, bool resolve_abstract_p) |
5c631832 | 23578 | { |
918dd910 | 23579 | struct dwarf2_cu *cu; |
5c631832 JK |
23580 | struct die_info *die; |
23581 | struct attribute *attr; | |
23582 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
23583 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
23584 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 23585 | |
918dd910 | 23586 | if (per_cu->cu == NULL) |
58f0c718 | 23587 | load_cu (per_cu, false); |
918dd910 | 23588 | cu = per_cu->cu; |
cc12ce38 DE |
23589 | if (cu == NULL) |
23590 | { | |
23591 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23592 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23593 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23594 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23595 | } |
918dd910 | 23596 | |
9c541725 | 23597 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 23598 | if (!die) |
9d8780f0 SM |
23599 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23600 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
23601 | |
23602 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 23603 | if (!attr && resolve_abstract_p |
3360b6e7 | 23604 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
23605 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
23606 | { | |
23607 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
6a053cb1 | 23608 | CORE_ADDR baseaddr = objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
eba4caf2 | 23609 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
e4a62c65 | 23610 | |
3360b6e7 TV |
23611 | for (const auto &cand_off |
23612 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 23613 | { |
3360b6e7 TV |
23614 | struct dwarf2_cu *cand_cu = cu; |
23615 | struct die_info *cand | |
23616 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
23617 | if (!cand | |
23618 | || !cand->parent | |
e4a62c65 TV |
23619 | || cand->parent->tag != DW_TAG_subprogram) |
23620 | continue; | |
23621 | ||
23622 | CORE_ADDR pc_low, pc_high; | |
23623 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
23624 | if (pc_low == ((CORE_ADDR) -1)) |
23625 | continue; | |
23626 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
23627 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
23628 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
23629 | continue; |
23630 | ||
23631 | die = cand; | |
23632 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
23633 | break; | |
23634 | } | |
23635 | } | |
23636 | ||
5c631832 JK |
23637 | if (!attr) |
23638 | { | |
e103e986 JK |
23639 | /* DWARF: "If there is no such attribute, then there is no effect.". |
23640 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 23641 | |
e103e986 | 23642 | retval.data = NULL; |
5c631832 JK |
23643 | retval.size = 0; |
23644 | } | |
8cf6f0b1 TT |
23645 | else if (attr_form_is_section_offset (attr)) |
23646 | { | |
23647 | struct dwarf2_loclist_baton loclist_baton; | |
23648 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
23649 | size_t size; | |
23650 | ||
23651 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
23652 | ||
23653 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
23654 | &size, pc); | |
23655 | retval.size = size; | |
23656 | } | |
5c631832 JK |
23657 | else |
23658 | { | |
23659 | if (!attr_form_is_block (attr)) | |
9d8780f0 | 23660 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 23661 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 23662 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
23663 | |
23664 | retval.data = DW_BLOCK (attr)->data; | |
23665 | retval.size = DW_BLOCK (attr)->size; | |
23666 | } | |
23667 | retval.per_cu = cu->per_cu; | |
918dd910 | 23668 | |
ed2dc618 | 23669 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 23670 | |
5c631832 | 23671 | return retval; |
348e048f DE |
23672 | } |
23673 | ||
8b9737bf TT |
23674 | /* Like dwarf2_fetch_die_loc_sect_off, but take a CU |
23675 | offset. */ | |
23676 | ||
23677 | struct dwarf2_locexpr_baton | |
23678 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
23679 | struct dwarf2_per_cu_data *per_cu, | |
23680 | CORE_ADDR (*get_frame_pc) (void *baton), | |
23681 | void *baton) | |
23682 | { | |
9c541725 | 23683 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 23684 | |
9c541725 | 23685 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
23686 | } |
23687 | ||
b6807d98 TT |
23688 | /* Write a constant of a given type as target-ordered bytes into |
23689 | OBSTACK. */ | |
23690 | ||
23691 | static const gdb_byte * | |
23692 | write_constant_as_bytes (struct obstack *obstack, | |
23693 | enum bfd_endian byte_order, | |
23694 | struct type *type, | |
23695 | ULONGEST value, | |
23696 | LONGEST *len) | |
23697 | { | |
23698 | gdb_byte *result; | |
23699 | ||
23700 | *len = TYPE_LENGTH (type); | |
224c3ddb | 23701 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23702 | store_unsigned_integer (result, *len, byte_order, value); |
23703 | ||
23704 | return result; | |
23705 | } | |
23706 | ||
23707 | /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a | |
23708 | pointer to the constant bytes and set LEN to the length of the | |
23709 | data. If memory is needed, allocate it on OBSTACK. If the DIE | |
23710 | does not have a DW_AT_const_value, return NULL. */ | |
23711 | ||
23712 | const gdb_byte * | |
9c541725 | 23713 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
b6807d98 TT |
23714 | struct dwarf2_per_cu_data *per_cu, |
23715 | struct obstack *obstack, | |
23716 | LONGEST *len) | |
23717 | { | |
23718 | struct dwarf2_cu *cu; | |
23719 | struct die_info *die; | |
23720 | struct attribute *attr; | |
23721 | const gdb_byte *result = NULL; | |
23722 | struct type *type; | |
23723 | LONGEST value; | |
23724 | enum bfd_endian byte_order; | |
e3b94546 | 23725 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 23726 | |
b6807d98 | 23727 | if (per_cu->cu == NULL) |
58f0c718 | 23728 | load_cu (per_cu, false); |
b6807d98 | 23729 | cu = per_cu->cu; |
cc12ce38 DE |
23730 | if (cu == NULL) |
23731 | { | |
23732 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23733 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23734 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23735 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23736 | } |
b6807d98 | 23737 | |
9c541725 | 23738 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 23739 | if (!die) |
9d8780f0 SM |
23740 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23741 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
23742 | |
23743 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23744 | if (attr == NULL) | |
23745 | return NULL; | |
23746 | ||
e3b94546 | 23747 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
23748 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
23749 | ||
23750 | switch (attr->form) | |
23751 | { | |
23752 | case DW_FORM_addr: | |
336d760d | 23753 | case DW_FORM_addrx: |
b6807d98 TT |
23754 | case DW_FORM_GNU_addr_index: |
23755 | { | |
23756 | gdb_byte *tem; | |
23757 | ||
23758 | *len = cu->header.addr_size; | |
224c3ddb | 23759 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23760 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
23761 | result = tem; | |
23762 | } | |
23763 | break; | |
23764 | case DW_FORM_string: | |
23765 | case DW_FORM_strp: | |
cf532bd1 | 23766 | case DW_FORM_strx: |
b6807d98 TT |
23767 | case DW_FORM_GNU_str_index: |
23768 | case DW_FORM_GNU_strp_alt: | |
23769 | /* DW_STRING is already allocated on the objfile obstack, point | |
23770 | directly to it. */ | |
23771 | result = (const gdb_byte *) DW_STRING (attr); | |
23772 | *len = strlen (DW_STRING (attr)); | |
23773 | break; | |
23774 | case DW_FORM_block1: | |
23775 | case DW_FORM_block2: | |
23776 | case DW_FORM_block4: | |
23777 | case DW_FORM_block: | |
23778 | case DW_FORM_exprloc: | |
0224619f | 23779 | case DW_FORM_data16: |
b6807d98 TT |
23780 | result = DW_BLOCK (attr)->data; |
23781 | *len = DW_BLOCK (attr)->size; | |
23782 | break; | |
23783 | ||
23784 | /* The DW_AT_const_value attributes are supposed to carry the | |
23785 | symbol's value "represented as it would be on the target | |
23786 | architecture." By the time we get here, it's already been | |
23787 | converted to host endianness, so we just need to sign- or | |
23788 | zero-extend it as appropriate. */ | |
23789 | case DW_FORM_data1: | |
23790 | type = die_type (die, cu); | |
23791 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23792 | if (result == NULL) | |
23793 | result = write_constant_as_bytes (obstack, byte_order, | |
23794 | type, value, len); | |
23795 | break; | |
23796 | case DW_FORM_data2: | |
23797 | type = die_type (die, cu); | |
23798 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23799 | if (result == NULL) | |
23800 | result = write_constant_as_bytes (obstack, byte_order, | |
23801 | type, value, len); | |
23802 | break; | |
23803 | case DW_FORM_data4: | |
23804 | type = die_type (die, cu); | |
23805 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23806 | if (result == NULL) | |
23807 | result = write_constant_as_bytes (obstack, byte_order, | |
23808 | type, value, len); | |
23809 | break; | |
23810 | case DW_FORM_data8: | |
23811 | type = die_type (die, cu); | |
23812 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23813 | if (result == NULL) | |
23814 | result = write_constant_as_bytes (obstack, byte_order, | |
23815 | type, value, len); | |
23816 | break; | |
23817 | ||
23818 | case DW_FORM_sdata: | |
663c44ac | 23819 | case DW_FORM_implicit_const: |
b6807d98 TT |
23820 | type = die_type (die, cu); |
23821 | result = write_constant_as_bytes (obstack, byte_order, | |
23822 | type, DW_SND (attr), len); | |
23823 | break; | |
23824 | ||
23825 | case DW_FORM_udata: | |
23826 | type = die_type (die, cu); | |
23827 | result = write_constant_as_bytes (obstack, byte_order, | |
23828 | type, DW_UNSND (attr), len); | |
23829 | break; | |
23830 | ||
23831 | default: | |
b98664d3 | 23832 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
23833 | dwarf_form_name (attr->form)); |
23834 | break; | |
23835 | } | |
23836 | ||
23837 | return result; | |
23838 | } | |
23839 | ||
7942e96e AA |
23840 | /* Return the type of the die at OFFSET in PER_CU. Return NULL if no |
23841 | valid type for this die is found. */ | |
23842 | ||
23843 | struct type * | |
9c541725 | 23844 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
7942e96e AA |
23845 | struct dwarf2_per_cu_data *per_cu) |
23846 | { | |
23847 | struct dwarf2_cu *cu; | |
23848 | struct die_info *die; | |
23849 | ||
7942e96e | 23850 | if (per_cu->cu == NULL) |
58f0c718 | 23851 | load_cu (per_cu, false); |
7942e96e AA |
23852 | cu = per_cu->cu; |
23853 | if (!cu) | |
23854 | return NULL; | |
23855 | ||
9c541725 | 23856 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23857 | if (!die) |
23858 | return NULL; | |
23859 | ||
23860 | return die_type (die, cu); | |
23861 | } | |
23862 | ||
8a9b8146 TT |
23863 | /* Return the type of the DIE at DIE_OFFSET in the CU named by |
23864 | PER_CU. */ | |
23865 | ||
23866 | struct type * | |
b64f50a1 | 23867 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
23868 | struct dwarf2_per_cu_data *per_cu) |
23869 | { | |
9c541725 | 23870 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 23871 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
23872 | } |
23873 | ||
ac9ec31b | 23874 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23875 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23876 | On exit *REF_CU is the CU of the result. |
23877 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23878 | |
23879 | static struct die_info * | |
ac9ec31b DE |
23880 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23881 | struct dwarf2_cu **ref_cu) | |
348e048f | 23882 | { |
348e048f | 23883 | struct die_info temp_die; |
c24bdb02 | 23884 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
23885 | struct die_info *die; |
23886 | ||
ac9ec31b DE |
23887 | /* While it might be nice to assert sig_type->type == NULL here, |
23888 | we can get here for DW_AT_imported_declaration where we need | |
23889 | the DIE not the type. */ | |
348e048f DE |
23890 | |
23891 | /* If necessary, add it to the queue and load its DIEs. */ | |
23892 | ||
95554aad | 23893 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 23894 | read_signatured_type (sig_type); |
348e048f | 23895 | |
348e048f | 23896 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 23897 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23898 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23899 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23900 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23901 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23902 | if (die) |
23903 | { | |
ed2dc618 | 23904 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 23905 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 23906 | |
796a7ff8 DE |
23907 | /* For .gdb_index version 7 keep track of included TUs. |
23908 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
23909 | if (dwarf2_per_objfile->index_table != NULL | |
23910 | && dwarf2_per_objfile->index_table->version <= 7) | |
23911 | { | |
ae640021 | 23912 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
23913 | } |
23914 | ||
348e048f | 23915 | *ref_cu = sig_cu; |
c24bdb02 KS |
23916 | if (sig_cu != cu) |
23917 | sig_cu->ancestor = cu; | |
23918 | ||
348e048f DE |
23919 | return die; |
23920 | } | |
23921 | ||
ac9ec31b DE |
23922 | return NULL; |
23923 | } | |
23924 | ||
23925 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23926 | On entry *REF_CU is the CU of SRC_DIE. | |
23927 | On exit *REF_CU is the CU of the result. | |
23928 | The result is the DIE of the type. | |
23929 | If the referenced type cannot be found an error is thrown. */ | |
23930 | ||
23931 | static struct die_info * | |
ff39bb5e | 23932 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23933 | struct dwarf2_cu **ref_cu) |
23934 | { | |
23935 | ULONGEST signature = DW_SIGNATURE (attr); | |
23936 | struct signatured_type *sig_type; | |
23937 | struct die_info *die; | |
23938 | ||
23939 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23940 | ||
a2ce51a0 | 23941 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23942 | /* sig_type will be NULL if the signatured type is missing from |
23943 | the debug info. */ | |
23944 | if (sig_type == NULL) | |
23945 | { | |
23946 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
23947 | " from DIE at %s [in module %s]"), |
23948 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23949 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23950 | } |
23951 | ||
23952 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23953 | if (die == NULL) | |
23954 | { | |
23955 | dump_die_for_error (src_die); | |
23956 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
23957 | " from DIE at %s [in module %s]"), |
23958 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 23959 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23960 | } |
23961 | ||
23962 | return die; | |
23963 | } | |
23964 | ||
23965 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23966 | reading in and processing the type unit if necessary. */ | |
23967 | ||
23968 | static struct type * | |
23969 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23970 | struct dwarf2_cu *cu) | |
23971 | { | |
518817b3 SM |
23972 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23973 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
23974 | struct signatured_type *sig_type; |
23975 | struct dwarf2_cu *type_cu; | |
23976 | struct die_info *type_die; | |
23977 | struct type *type; | |
23978 | ||
a2ce51a0 | 23979 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23980 | /* sig_type will be NULL if the signatured type is missing from |
23981 | the debug info. */ | |
23982 | if (sig_type == NULL) | |
23983 | { | |
b98664d3 | 23984 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
23985 | " from DIE at %s [in module %s]"), |
23986 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 23987 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
23988 | return build_error_marker_type (cu, die); |
23989 | } | |
23990 | ||
23991 | /* If we already know the type we're done. */ | |
23992 | if (sig_type->type != NULL) | |
23993 | return sig_type->type; | |
23994 | ||
23995 | type_cu = cu; | |
23996 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23997 | if (type_die != NULL) | |
23998 | { | |
23999 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
24000 | is created. This is important, for example, because for c++ classes | |
24001 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
24002 | type = read_type_die (type_die, type_cu); | |
24003 | if (type == NULL) | |
24004 | { | |
b98664d3 | 24005 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
24006 | " referenced from DIE at %s [in module %s]"), |
24007 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 24008 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
24009 | type = build_error_marker_type (cu, die); |
24010 | } | |
24011 | } | |
24012 | else | |
24013 | { | |
b98664d3 | 24014 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
24015 | " from DIE at %s [in module %s]"), |
24016 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 24017 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
24018 | type = build_error_marker_type (cu, die); |
24019 | } | |
24020 | sig_type->type = type; | |
24021 | ||
24022 | return type; | |
24023 | } | |
24024 | ||
24025 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
24026 | reading in and processing the type unit if necessary. */ | |
24027 | ||
24028 | static struct type * | |
ff39bb5e | 24029 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 24030 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
24031 | { |
24032 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
7771576e | 24033 | if (attr_form_is_ref (attr)) |
ac9ec31b DE |
24034 | { |
24035 | struct dwarf2_cu *type_cu = cu; | |
24036 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
24037 | ||
24038 | return read_type_die (type_die, type_cu); | |
24039 | } | |
24040 | else if (attr->form == DW_FORM_ref_sig8) | |
24041 | { | |
24042 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
24043 | } | |
24044 | else | |
24045 | { | |
518817b3 SM |
24046 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24047 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 24048 | |
b98664d3 | 24049 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
24050 | " at %s [in module %s]"), |
24051 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 24052 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
24053 | return build_error_marker_type (cu, die); |
24054 | } | |
348e048f DE |
24055 | } |
24056 | ||
e5fe5e75 | 24057 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
24058 | |
24059 | static void | |
e5fe5e75 | 24060 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 24061 | { |
52dc124a | 24062 | struct signatured_type *sig_type; |
348e048f | 24063 | |
f4dc4d17 DE |
24064 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
24065 | gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu)); | |
24066 | ||
6721b2ec DE |
24067 | /* We have the per_cu, but we need the signatured_type. |
24068 | Fortunately this is an easy translation. */ | |
24069 | gdb_assert (per_cu->is_debug_types); | |
24070 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 24071 | |
6721b2ec | 24072 | gdb_assert (per_cu->cu == NULL); |
348e048f | 24073 | |
52dc124a | 24074 | read_signatured_type (sig_type); |
348e048f | 24075 | |
6721b2ec | 24076 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
24077 | } |
24078 | ||
dee91e82 DE |
24079 | /* die_reader_func for read_signatured_type. |
24080 | This is identical to load_full_comp_unit_reader, | |
24081 | but is kept separate for now. */ | |
348e048f DE |
24082 | |
24083 | static void | |
dee91e82 | 24084 | read_signatured_type_reader (const struct die_reader_specs *reader, |
d521ce57 | 24085 | const gdb_byte *info_ptr, |
dee91e82 DE |
24086 | struct die_info *comp_unit_die, |
24087 | int has_children, | |
24088 | void *data) | |
348e048f | 24089 | { |
dee91e82 | 24090 | struct dwarf2_cu *cu = reader->cu; |
348e048f | 24091 | |
dee91e82 DE |
24092 | gdb_assert (cu->die_hash == NULL); |
24093 | cu->die_hash = | |
24094 | htab_create_alloc_ex (cu->header.length / 12, | |
24095 | die_hash, | |
24096 | die_eq, | |
24097 | NULL, | |
24098 | &cu->comp_unit_obstack, | |
24099 | hashtab_obstack_allocate, | |
24100 | dummy_obstack_deallocate); | |
348e048f | 24101 | |
dee91e82 DE |
24102 | if (has_children) |
24103 | comp_unit_die->child = read_die_and_siblings (reader, info_ptr, | |
24104 | &info_ptr, comp_unit_die); | |
24105 | cu->dies = comp_unit_die; | |
24106 | /* comp_unit_die is not stored in die_hash, no need. */ | |
348e048f DE |
24107 | |
24108 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 24109 | all CUs needed for references have been loaded yet, and symbol |
348e048f | 24110 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
24111 | or we won't be able to build types correctly. |
24112 | Similarly, if we do not read the producer, we can not apply | |
24113 | producer-specific interpretation. */ | |
95554aad | 24114 | prepare_one_comp_unit (cu, cu->dies, language_minimal); |
dee91e82 | 24115 | } |
348e048f | 24116 | |
3019eac3 DE |
24117 | /* Read in a signatured type and build its CU and DIEs. |
24118 | If the type is a stub for the real type in a DWO file, | |
24119 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
24120 | |
24121 | static void | |
24122 | read_signatured_type (struct signatured_type *sig_type) | |
24123 | { | |
24124 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 24125 | |
3019eac3 | 24126 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 24127 | gdb_assert (per_cu->cu == NULL); |
348e048f | 24128 | |
58f0c718 | 24129 | init_cutu_and_read_dies (per_cu, NULL, 0, 1, false, |
f4dc4d17 | 24130 | read_signatured_type_reader, NULL); |
7ee85ab1 | 24131 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
24132 | } |
24133 | ||
c906108c SS |
24134 | /* Decode simple location descriptions. |
24135 | Given a pointer to a dwarf block that defines a location, compute | |
24136 | the location and return the value. | |
24137 | ||
4cecd739 DJ |
24138 | NOTE drow/2003-11-18: This function is called in two situations |
24139 | now: for the address of static or global variables (partial symbols | |
24140 | only) and for offsets into structures which are expected to be | |
24141 | (more or less) constant. The partial symbol case should go away, | |
24142 | and only the constant case should remain. That will let this | |
24143 | function complain more accurately. A few special modes are allowed | |
24144 | without complaint for global variables (for instance, global | |
24145 | register values and thread-local values). | |
c906108c SS |
24146 | |
24147 | A location description containing no operations indicates that the | |
4cecd739 | 24148 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
24149 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
24150 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
24151 | complaint. |
24152 | ||
24153 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
24154 | |
24155 | static CORE_ADDR | |
e7c27a73 | 24156 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 24157 | { |
518817b3 | 24158 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
24159 | size_t i; |
24160 | size_t size = blk->size; | |
d521ce57 | 24161 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
24162 | CORE_ADDR stack[64]; |
24163 | int stacki; | |
24164 | unsigned int bytes_read, unsnd; | |
24165 | gdb_byte op; | |
c906108c | 24166 | |
21ae7a4d JK |
24167 | i = 0; |
24168 | stacki = 0; | |
24169 | stack[stacki] = 0; | |
24170 | stack[++stacki] = 0; | |
24171 | ||
24172 | while (i < size) | |
24173 | { | |
24174 | op = data[i++]; | |
24175 | switch (op) | |
24176 | { | |
24177 | case DW_OP_lit0: | |
24178 | case DW_OP_lit1: | |
24179 | case DW_OP_lit2: | |
24180 | case DW_OP_lit3: | |
24181 | case DW_OP_lit4: | |
24182 | case DW_OP_lit5: | |
24183 | case DW_OP_lit6: | |
24184 | case DW_OP_lit7: | |
24185 | case DW_OP_lit8: | |
24186 | case DW_OP_lit9: | |
24187 | case DW_OP_lit10: | |
24188 | case DW_OP_lit11: | |
24189 | case DW_OP_lit12: | |
24190 | case DW_OP_lit13: | |
24191 | case DW_OP_lit14: | |
24192 | case DW_OP_lit15: | |
24193 | case DW_OP_lit16: | |
24194 | case DW_OP_lit17: | |
24195 | case DW_OP_lit18: | |
24196 | case DW_OP_lit19: | |
24197 | case DW_OP_lit20: | |
24198 | case DW_OP_lit21: | |
24199 | case DW_OP_lit22: | |
24200 | case DW_OP_lit23: | |
24201 | case DW_OP_lit24: | |
24202 | case DW_OP_lit25: | |
24203 | case DW_OP_lit26: | |
24204 | case DW_OP_lit27: | |
24205 | case DW_OP_lit28: | |
24206 | case DW_OP_lit29: | |
24207 | case DW_OP_lit30: | |
24208 | case DW_OP_lit31: | |
24209 | stack[++stacki] = op - DW_OP_lit0; | |
24210 | break; | |
f1bea926 | 24211 | |
21ae7a4d JK |
24212 | case DW_OP_reg0: |
24213 | case DW_OP_reg1: | |
24214 | case DW_OP_reg2: | |
24215 | case DW_OP_reg3: | |
24216 | case DW_OP_reg4: | |
24217 | case DW_OP_reg5: | |
24218 | case DW_OP_reg6: | |
24219 | case DW_OP_reg7: | |
24220 | case DW_OP_reg8: | |
24221 | case DW_OP_reg9: | |
24222 | case DW_OP_reg10: | |
24223 | case DW_OP_reg11: | |
24224 | case DW_OP_reg12: | |
24225 | case DW_OP_reg13: | |
24226 | case DW_OP_reg14: | |
24227 | case DW_OP_reg15: | |
24228 | case DW_OP_reg16: | |
24229 | case DW_OP_reg17: | |
24230 | case DW_OP_reg18: | |
24231 | case DW_OP_reg19: | |
24232 | case DW_OP_reg20: | |
24233 | case DW_OP_reg21: | |
24234 | case DW_OP_reg22: | |
24235 | case DW_OP_reg23: | |
24236 | case DW_OP_reg24: | |
24237 | case DW_OP_reg25: | |
24238 | case DW_OP_reg26: | |
24239 | case DW_OP_reg27: | |
24240 | case DW_OP_reg28: | |
24241 | case DW_OP_reg29: | |
24242 | case DW_OP_reg30: | |
24243 | case DW_OP_reg31: | |
24244 | stack[++stacki] = op - DW_OP_reg0; | |
24245 | if (i < size) | |
24246 | dwarf2_complex_location_expr_complaint (); | |
24247 | break; | |
c906108c | 24248 | |
21ae7a4d JK |
24249 | case DW_OP_regx: |
24250 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
24251 | i += bytes_read; | |
24252 | stack[++stacki] = unsnd; | |
24253 | if (i < size) | |
24254 | dwarf2_complex_location_expr_complaint (); | |
24255 | break; | |
c906108c | 24256 | |
21ae7a4d JK |
24257 | case DW_OP_addr: |
24258 | stack[++stacki] = read_address (objfile->obfd, &data[i], | |
24259 | cu, &bytes_read); | |
24260 | i += bytes_read; | |
24261 | break; | |
d53d4ac5 | 24262 | |
21ae7a4d JK |
24263 | case DW_OP_const1u: |
24264 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
24265 | i += 1; | |
24266 | break; | |
24267 | ||
24268 | case DW_OP_const1s: | |
24269 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
24270 | i += 1; | |
24271 | break; | |
24272 | ||
24273 | case DW_OP_const2u: | |
24274 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
24275 | i += 2; | |
24276 | break; | |
24277 | ||
24278 | case DW_OP_const2s: | |
24279 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
24280 | i += 2; | |
24281 | break; | |
d53d4ac5 | 24282 | |
21ae7a4d JK |
24283 | case DW_OP_const4u: |
24284 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
24285 | i += 4; | |
24286 | break; | |
24287 | ||
24288 | case DW_OP_const4s: | |
24289 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
24290 | i += 4; | |
24291 | break; | |
24292 | ||
585861ea JK |
24293 | case DW_OP_const8u: |
24294 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
24295 | i += 8; | |
24296 | break; | |
24297 | ||
21ae7a4d JK |
24298 | case DW_OP_constu: |
24299 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
24300 | &bytes_read); | |
24301 | i += bytes_read; | |
24302 | break; | |
24303 | ||
24304 | case DW_OP_consts: | |
24305 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
24306 | i += bytes_read; | |
24307 | break; | |
24308 | ||
24309 | case DW_OP_dup: | |
24310 | stack[stacki + 1] = stack[stacki]; | |
24311 | stacki++; | |
24312 | break; | |
24313 | ||
24314 | case DW_OP_plus: | |
24315 | stack[stacki - 1] += stack[stacki]; | |
24316 | stacki--; | |
24317 | break; | |
24318 | ||
24319 | case DW_OP_plus_uconst: | |
24320 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
24321 | &bytes_read); | |
24322 | i += bytes_read; | |
24323 | break; | |
24324 | ||
24325 | case DW_OP_minus: | |
24326 | stack[stacki - 1] -= stack[stacki]; | |
24327 | stacki--; | |
24328 | break; | |
24329 | ||
24330 | case DW_OP_deref: | |
24331 | /* If we're not the last op, then we definitely can't encode | |
24332 | this using GDB's address_class enum. This is valid for partial | |
24333 | global symbols, although the variable's address will be bogus | |
24334 | in the psymtab. */ | |
24335 | if (i < size) | |
24336 | dwarf2_complex_location_expr_complaint (); | |
24337 | break; | |
24338 | ||
24339 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 24340 | case DW_OP_form_tls_address: |
21ae7a4d JK |
24341 | /* The top of the stack has the offset from the beginning |
24342 | of the thread control block at which the variable is located. */ | |
24343 | /* Nothing should follow this operator, so the top of stack would | |
24344 | be returned. */ | |
24345 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
24346 | address will be bogus in the psymtab. Make it always at least |
24347 | non-zero to not look as a variable garbage collected by linker | |
24348 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
24349 | if (i < size) |
24350 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 24351 | stack[stacki]++; |
21ae7a4d JK |
24352 | break; |
24353 | ||
24354 | case DW_OP_GNU_uninit: | |
24355 | break; | |
24356 | ||
336d760d | 24357 | case DW_OP_addrx: |
3019eac3 | 24358 | case DW_OP_GNU_addr_index: |
49f6c839 | 24359 | case DW_OP_GNU_const_index: |
3019eac3 DE |
24360 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
24361 | &bytes_read); | |
24362 | i += bytes_read; | |
24363 | break; | |
24364 | ||
21ae7a4d JK |
24365 | default: |
24366 | { | |
f39c6ffd | 24367 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
24368 | |
24369 | if (name) | |
b98664d3 | 24370 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
24371 | name); |
24372 | else | |
b98664d3 | 24373 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
24374 | op); |
24375 | } | |
24376 | ||
24377 | return (stack[stacki]); | |
d53d4ac5 | 24378 | } |
3c6e0cb3 | 24379 | |
21ae7a4d JK |
24380 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
24381 | outside of the allocated space. Also enforce minimum>0. */ | |
24382 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
24383 | { | |
b98664d3 | 24384 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
24385 | return 0; |
24386 | } | |
24387 | ||
24388 | if (stacki <= 0) | |
24389 | { | |
b98664d3 | 24390 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
24391 | return 0; |
24392 | } | |
24393 | } | |
24394 | return (stack[stacki]); | |
c906108c SS |
24395 | } |
24396 | ||
24397 | /* memory allocation interface */ | |
24398 | ||
c906108c | 24399 | static struct dwarf_block * |
7b5a2f43 | 24400 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 24401 | { |
8d749320 | 24402 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
24403 | } |
24404 | ||
c906108c | 24405 | static struct die_info * |
b60c80d6 | 24406 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
24407 | { |
24408 | struct die_info *die; | |
b60c80d6 DJ |
24409 | size_t size = sizeof (struct die_info); |
24410 | ||
24411 | if (num_attrs > 1) | |
24412 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 24413 | |
b60c80d6 | 24414 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
24415 | memset (die, 0, sizeof (struct die_info)); |
24416 | return (die); | |
24417 | } | |
2e276125 JB |
24418 | |
24419 | \f | |
24420 | /* Macro support. */ | |
24421 | ||
233d95b5 JK |
24422 | /* Return file name relative to the compilation directory of file number I in |
24423 | *LH's file name table. The result is allocated using xmalloc; the caller is | |
2e276125 | 24424 | responsible for freeing it. */ |
233d95b5 | 24425 | |
2e276125 | 24426 | static char * |
233d95b5 | 24427 | file_file_name (int file, struct line_header *lh) |
2e276125 | 24428 | { |
6a83a1e6 EZ |
24429 | /* Is the file number a valid index into the line header's file name |
24430 | table? Remember that file numbers start with one, not zero. */ | |
7ba99d21 | 24431 | if (lh->is_valid_file_index (file)) |
6a83a1e6 | 24432 | { |
7ba99d21 | 24433 | const file_entry *fe = lh->file_name_at (file); |
6e70227d | 24434 | |
7ba99d21 | 24435 | if (!IS_ABSOLUTE_PATH (fe->name)) |
8c43009f | 24436 | { |
7ba99d21 | 24437 | const char *dir = fe->include_dir (lh); |
8c43009f | 24438 | if (dir != NULL) |
7ba99d21 | 24439 | return concat (dir, SLASH_STRING, fe->name, (char *) NULL); |
8c43009f | 24440 | } |
7ba99d21 | 24441 | return xstrdup (fe->name); |
6a83a1e6 | 24442 | } |
2e276125 JB |
24443 | else |
24444 | { | |
6a83a1e6 EZ |
24445 | /* The compiler produced a bogus file number. We can at least |
24446 | record the macro definitions made in the file, even if we | |
24447 | won't be able to find the file by name. */ | |
24448 | char fake_name[80]; | |
9a619af0 | 24449 | |
8c042590 PM |
24450 | xsnprintf (fake_name, sizeof (fake_name), |
24451 | "<bad macro file number %d>", file); | |
2e276125 | 24452 | |
b98664d3 | 24453 | complaint (_("bad file number in macro information (%d)"), |
6a83a1e6 | 24454 | file); |
2e276125 | 24455 | |
6a83a1e6 | 24456 | return xstrdup (fake_name); |
2e276125 JB |
24457 | } |
24458 | } | |
24459 | ||
233d95b5 JK |
24460 | /* Return the full name of file number I in *LH's file name table. |
24461 | Use COMP_DIR as the name of the current directory of the | |
24462 | compilation. The result is allocated using xmalloc; the caller is | |
24463 | responsible for freeing it. */ | |
24464 | static char * | |
24465 | file_full_name (int file, struct line_header *lh, const char *comp_dir) | |
24466 | { | |
24467 | /* Is the file number a valid index into the line header's file name | |
24468 | table? Remember that file numbers start with one, not zero. */ | |
7ba99d21 | 24469 | if (lh->is_valid_file_index (file)) |
233d95b5 JK |
24470 | { |
24471 | char *relative = file_file_name (file, lh); | |
24472 | ||
24473 | if (IS_ABSOLUTE_PATH (relative) || comp_dir == NULL) | |
24474 | return relative; | |
b36cec19 PA |
24475 | return reconcat (relative, comp_dir, SLASH_STRING, |
24476 | relative, (char *) NULL); | |
233d95b5 JK |
24477 | } |
24478 | else | |
24479 | return file_file_name (file, lh); | |
24480 | } | |
24481 | ||
2e276125 JB |
24482 | |
24483 | static struct macro_source_file * | |
804d2729 TT |
24484 | macro_start_file (struct dwarf2_cu *cu, |
24485 | int file, int line, | |
2e276125 | 24486 | struct macro_source_file *current_file, |
43f3e411 | 24487 | struct line_header *lh) |
2e276125 | 24488 | { |
233d95b5 JK |
24489 | /* File name relative to the compilation directory of this source file. */ |
24490 | char *file_name = file_file_name (file, lh); | |
2e276125 | 24491 | |
2e276125 | 24492 | if (! current_file) |
abc9d0dc | 24493 | { |
fc474241 DE |
24494 | /* Note: We don't create a macro table for this compilation unit |
24495 | at all until we actually get a filename. */ | |
c24bdb02 | 24496 | struct macro_table *macro_table = cu->get_builder ()->get_macro_table (); |
fc474241 | 24497 | |
abc9d0dc TT |
24498 | /* If we have no current file, then this must be the start_file |
24499 | directive for the compilation unit's main source file. */ | |
fc474241 DE |
24500 | current_file = macro_set_main (macro_table, file_name); |
24501 | macro_define_special (macro_table); | |
abc9d0dc | 24502 | } |
2e276125 | 24503 | else |
233d95b5 | 24504 | current_file = macro_include (current_file, line, file_name); |
2e276125 | 24505 | |
233d95b5 | 24506 | xfree (file_name); |
6e70227d | 24507 | |
2e276125 JB |
24508 | return current_file; |
24509 | } | |
24510 | ||
2e276125 JB |
24511 | static const char * |
24512 | consume_improper_spaces (const char *p, const char *body) | |
24513 | { | |
24514 | if (*p == ' ') | |
24515 | { | |
b98664d3 | 24516 | complaint (_("macro definition contains spaces " |
3e43a32a | 24517 | "in formal argument list:\n`%s'"), |
4d3c2250 | 24518 | body); |
2e276125 JB |
24519 | |
24520 | while (*p == ' ') | |
24521 | p++; | |
24522 | } | |
24523 | ||
24524 | return p; | |
24525 | } | |
24526 | ||
24527 | ||
24528 | static void | |
24529 | parse_macro_definition (struct macro_source_file *file, int line, | |
24530 | const char *body) | |
24531 | { | |
24532 | const char *p; | |
24533 | ||
24534 | /* The body string takes one of two forms. For object-like macro | |
24535 | definitions, it should be: | |
24536 | ||
24537 | <macro name> " " <definition> | |
24538 | ||
24539 | For function-like macro definitions, it should be: | |
24540 | ||
24541 | <macro name> "() " <definition> | |
24542 | or | |
24543 | <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition> | |
24544 | ||
24545 | Spaces may appear only where explicitly indicated, and in the | |
24546 | <definition>. | |
24547 | ||
24548 | The Dwarf 2 spec says that an object-like macro's name is always | |
24549 | followed by a space, but versions of GCC around March 2002 omit | |
6e70227d | 24550 | the space when the macro's definition is the empty string. |
2e276125 JB |
24551 | |
24552 | The Dwarf 2 spec says that there should be no spaces between the | |
24553 | formal arguments in a function-like macro's formal argument list, | |
24554 | but versions of GCC around March 2002 include spaces after the | |
24555 | commas. */ | |
24556 | ||
24557 | ||
24558 | /* Find the extent of the macro name. The macro name is terminated | |
24559 | by either a space or null character (for an object-like macro) or | |
24560 | an opening paren (for a function-like macro). */ | |
24561 | for (p = body; *p; p++) | |
24562 | if (*p == ' ' || *p == '(') | |
24563 | break; | |
24564 | ||
24565 | if (*p == ' ' || *p == '\0') | |
24566 | { | |
24567 | /* It's an object-like macro. */ | |
24568 | int name_len = p - body; | |
456e800a | 24569 | std::string name (body, name_len); |
2e276125 JB |
24570 | const char *replacement; |
24571 | ||
24572 | if (*p == ' ') | |
24573 | replacement = body + name_len + 1; | |
24574 | else | |
24575 | { | |
4d3c2250 | 24576 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24577 | replacement = body + name_len; |
24578 | } | |
6e70227d | 24579 | |
456e800a | 24580 | macro_define_object (file, line, name.c_str (), replacement); |
2e276125 JB |
24581 | } |
24582 | else if (*p == '(') | |
24583 | { | |
24584 | /* It's a function-like macro. */ | |
456e800a | 24585 | std::string name (body, p - body); |
2e276125 JB |
24586 | int argc = 0; |
24587 | int argv_size = 1; | |
8d749320 | 24588 | char **argv = XNEWVEC (char *, argv_size); |
2e276125 JB |
24589 | |
24590 | p++; | |
24591 | ||
24592 | p = consume_improper_spaces (p, body); | |
24593 | ||
24594 | /* Parse the formal argument list. */ | |
24595 | while (*p && *p != ')') | |
24596 | { | |
24597 | /* Find the extent of the current argument name. */ | |
24598 | const char *arg_start = p; | |
24599 | ||
24600 | while (*p && *p != ',' && *p != ')' && *p != ' ') | |
24601 | p++; | |
24602 | ||
24603 | if (! *p || p == arg_start) | |
4d3c2250 | 24604 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24605 | else |
24606 | { | |
24607 | /* Make sure argv has room for the new argument. */ | |
24608 | if (argc >= argv_size) | |
24609 | { | |
24610 | argv_size *= 2; | |
224c3ddb | 24611 | argv = XRESIZEVEC (char *, argv, argv_size); |
2e276125 JB |
24612 | } |
24613 | ||
3f8a7804 | 24614 | argv[argc++] = savestring (arg_start, p - arg_start); |
2e276125 JB |
24615 | } |
24616 | ||
24617 | p = consume_improper_spaces (p, body); | |
24618 | ||
24619 | /* Consume the comma, if present. */ | |
24620 | if (*p == ',') | |
24621 | { | |
24622 | p++; | |
24623 | ||
24624 | p = consume_improper_spaces (p, body); | |
24625 | } | |
24626 | } | |
24627 | ||
24628 | if (*p == ')') | |
24629 | { | |
24630 | p++; | |
24631 | ||
24632 | if (*p == ' ') | |
24633 | /* Perfectly formed definition, no complaints. */ | |
456e800a | 24634 | macro_define_function (file, line, name.c_str (), |
6e70227d | 24635 | argc, (const char **) argv, |
2e276125 JB |
24636 | p + 1); |
24637 | else if (*p == '\0') | |
24638 | { | |
24639 | /* Complain, but do define it. */ | |
4d3c2250 | 24640 | dwarf2_macro_malformed_definition_complaint (body); |
456e800a | 24641 | macro_define_function (file, line, name.c_str (), |
6e70227d | 24642 | argc, (const char **) argv, |
2e276125 JB |
24643 | p); |
24644 | } | |
24645 | else | |
24646 | /* Just complain. */ | |
4d3c2250 | 24647 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24648 | } |
24649 | else | |
24650 | /* Just complain. */ | |
4d3c2250 | 24651 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 | 24652 | |
2e276125 JB |
24653 | { |
24654 | int i; | |
24655 | ||
24656 | for (i = 0; i < argc; i++) | |
24657 | xfree (argv[i]); | |
24658 | } | |
24659 | xfree (argv); | |
24660 | } | |
24661 | else | |
4d3c2250 | 24662 | dwarf2_macro_malformed_definition_complaint (body); |
2e276125 JB |
24663 | } |
24664 | ||
cf2c3c16 TT |
24665 | /* Skip some bytes from BYTES according to the form given in FORM. |
24666 | Returns the new pointer. */ | |
2e276125 | 24667 | |
d521ce57 TT |
24668 | static const gdb_byte * |
24669 | skip_form_bytes (bfd *abfd, const gdb_byte *bytes, const gdb_byte *buffer_end, | |
cf2c3c16 TT |
24670 | enum dwarf_form form, |
24671 | unsigned int offset_size, | |
24672 | struct dwarf2_section_info *section) | |
2e276125 | 24673 | { |
cf2c3c16 | 24674 | unsigned int bytes_read; |
2e276125 | 24675 | |
cf2c3c16 | 24676 | switch (form) |
2e276125 | 24677 | { |
cf2c3c16 TT |
24678 | case DW_FORM_data1: |
24679 | case DW_FORM_flag: | |
24680 | ++bytes; | |
24681 | break; | |
24682 | ||
24683 | case DW_FORM_data2: | |
24684 | bytes += 2; | |
24685 | break; | |
24686 | ||
24687 | case DW_FORM_data4: | |
24688 | bytes += 4; | |
24689 | break; | |
24690 | ||
24691 | case DW_FORM_data8: | |
24692 | bytes += 8; | |
24693 | break; | |
24694 | ||
0224619f JK |
24695 | case DW_FORM_data16: |
24696 | bytes += 16; | |
24697 | break; | |
24698 | ||
cf2c3c16 TT |
24699 | case DW_FORM_string: |
24700 | read_direct_string (abfd, bytes, &bytes_read); | |
24701 | bytes += bytes_read; | |
24702 | break; | |
24703 | ||
24704 | case DW_FORM_sec_offset: | |
24705 | case DW_FORM_strp: | |
36586728 | 24706 | case DW_FORM_GNU_strp_alt: |
cf2c3c16 TT |
24707 | bytes += offset_size; |
24708 | break; | |
24709 | ||
24710 | case DW_FORM_block: | |
24711 | bytes += read_unsigned_leb128 (abfd, bytes, &bytes_read); | |
24712 | bytes += bytes_read; | |
24713 | break; | |
24714 | ||
24715 | case DW_FORM_block1: | |
24716 | bytes += 1 + read_1_byte (abfd, bytes); | |
24717 | break; | |
24718 | case DW_FORM_block2: | |
24719 | bytes += 2 + read_2_bytes (abfd, bytes); | |
24720 | break; | |
24721 | case DW_FORM_block4: | |
24722 | bytes += 4 + read_4_bytes (abfd, bytes); | |
24723 | break; | |
24724 | ||
336d760d | 24725 | case DW_FORM_addrx: |
cf2c3c16 | 24726 | case DW_FORM_sdata: |
cf532bd1 | 24727 | case DW_FORM_strx: |
cf2c3c16 | 24728 | case DW_FORM_udata: |
3019eac3 DE |
24729 | case DW_FORM_GNU_addr_index: |
24730 | case DW_FORM_GNU_str_index: | |
d521ce57 | 24731 | bytes = gdb_skip_leb128 (bytes, buffer_end); |
f664829e DE |
24732 | if (bytes == NULL) |
24733 | { | |
24734 | dwarf2_section_buffer_overflow_complaint (section); | |
24735 | return NULL; | |
24736 | } | |
cf2c3c16 TT |
24737 | break; |
24738 | ||
663c44ac JK |
24739 | case DW_FORM_implicit_const: |
24740 | break; | |
24741 | ||
cf2c3c16 TT |
24742 | default: |
24743 | { | |
b98664d3 | 24744 | complaint (_("invalid form 0x%x in `%s'"), |
a32a8923 | 24745 | form, get_section_name (section)); |
cf2c3c16 TT |
24746 | return NULL; |
24747 | } | |
2e276125 JB |
24748 | } |
24749 | ||
cf2c3c16 TT |
24750 | return bytes; |
24751 | } | |
757a13d0 | 24752 | |
cf2c3c16 TT |
24753 | /* A helper for dwarf_decode_macros that handles skipping an unknown |
24754 | opcode. Returns an updated pointer to the macro data buffer; or, | |
24755 | on error, issues a complaint and returns NULL. */ | |
757a13d0 | 24756 | |
d521ce57 | 24757 | static const gdb_byte * |
cf2c3c16 | 24758 | skip_unknown_opcode (unsigned int opcode, |
d521ce57 TT |
24759 | const gdb_byte **opcode_definitions, |
24760 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, | |
cf2c3c16 TT |
24761 | bfd *abfd, |
24762 | unsigned int offset_size, | |
24763 | struct dwarf2_section_info *section) | |
24764 | { | |
24765 | unsigned int bytes_read, i; | |
24766 | unsigned long arg; | |
d521ce57 | 24767 | const gdb_byte *defn; |
2e276125 | 24768 | |
cf2c3c16 | 24769 | if (opcode_definitions[opcode] == NULL) |
2e276125 | 24770 | { |
b98664d3 | 24771 | complaint (_("unrecognized DW_MACFINO opcode 0x%x"), |
cf2c3c16 TT |
24772 | opcode); |
24773 | return NULL; | |
24774 | } | |
2e276125 | 24775 | |
cf2c3c16 TT |
24776 | defn = opcode_definitions[opcode]; |
24777 | arg = read_unsigned_leb128 (abfd, defn, &bytes_read); | |
24778 | defn += bytes_read; | |
2e276125 | 24779 | |
cf2c3c16 TT |
24780 | for (i = 0; i < arg; ++i) |
24781 | { | |
aead7601 SM |
24782 | mac_ptr = skip_form_bytes (abfd, mac_ptr, mac_end, |
24783 | (enum dwarf_form) defn[i], offset_size, | |
f664829e | 24784 | section); |
cf2c3c16 TT |
24785 | if (mac_ptr == NULL) |
24786 | { | |
24787 | /* skip_form_bytes already issued the complaint. */ | |
24788 | return NULL; | |
24789 | } | |
24790 | } | |
757a13d0 | 24791 | |
cf2c3c16 TT |
24792 | return mac_ptr; |
24793 | } | |
757a13d0 | 24794 | |
cf2c3c16 TT |
24795 | /* A helper function which parses the header of a macro section. |
24796 | If the macro section is the extended (for now called "GNU") type, | |
24797 | then this updates *OFFSET_SIZE. Returns a pointer to just after | |
24798 | the header, or issues a complaint and returns NULL on error. */ | |
757a13d0 | 24799 | |
d521ce57 TT |
24800 | static const gdb_byte * |
24801 | dwarf_parse_macro_header (const gdb_byte **opcode_definitions, | |
cf2c3c16 | 24802 | bfd *abfd, |
d521ce57 | 24803 | const gdb_byte *mac_ptr, |
cf2c3c16 TT |
24804 | unsigned int *offset_size, |
24805 | int section_is_gnu) | |
24806 | { | |
24807 | memset (opcode_definitions, 0, 256 * sizeof (gdb_byte *)); | |
757a13d0 | 24808 | |
cf2c3c16 TT |
24809 | if (section_is_gnu) |
24810 | { | |
24811 | unsigned int version, flags; | |
757a13d0 | 24812 | |
cf2c3c16 | 24813 | version = read_2_bytes (abfd, mac_ptr); |
0af92d60 | 24814 | if (version != 4 && version != 5) |
cf2c3c16 | 24815 | { |
b98664d3 | 24816 | complaint (_("unrecognized version `%d' in .debug_macro section"), |
cf2c3c16 TT |
24817 | version); |
24818 | return NULL; | |
24819 | } | |
24820 | mac_ptr += 2; | |
757a13d0 | 24821 | |
cf2c3c16 TT |
24822 | flags = read_1_byte (abfd, mac_ptr); |
24823 | ++mac_ptr; | |
24824 | *offset_size = (flags & 1) ? 8 : 4; | |
757a13d0 | 24825 | |
cf2c3c16 TT |
24826 | if ((flags & 2) != 0) |
24827 | /* We don't need the line table offset. */ | |
24828 | mac_ptr += *offset_size; | |
757a13d0 | 24829 | |
cf2c3c16 TT |
24830 | /* Vendor opcode descriptions. */ |
24831 | if ((flags & 4) != 0) | |
24832 | { | |
24833 | unsigned int i, count; | |
757a13d0 | 24834 | |
cf2c3c16 TT |
24835 | count = read_1_byte (abfd, mac_ptr); |
24836 | ++mac_ptr; | |
24837 | for (i = 0; i < count; ++i) | |
24838 | { | |
24839 | unsigned int opcode, bytes_read; | |
24840 | unsigned long arg; | |
24841 | ||
24842 | opcode = read_1_byte (abfd, mac_ptr); | |
24843 | ++mac_ptr; | |
24844 | opcode_definitions[opcode] = mac_ptr; | |
24845 | arg = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
24846 | mac_ptr += bytes_read; | |
24847 | mac_ptr += arg; | |
24848 | } | |
757a13d0 | 24849 | } |
cf2c3c16 | 24850 | } |
757a13d0 | 24851 | |
cf2c3c16 TT |
24852 | return mac_ptr; |
24853 | } | |
757a13d0 | 24854 | |
cf2c3c16 | 24855 | /* A helper for dwarf_decode_macros that handles the GNU extensions, |
0af92d60 | 24856 | including DW_MACRO_import. */ |
cf2c3c16 TT |
24857 | |
24858 | static void | |
804d2729 | 24859 | dwarf_decode_macro_bytes (struct dwarf2_cu *cu, |
ed2dc618 | 24860 | bfd *abfd, |
d521ce57 | 24861 | const gdb_byte *mac_ptr, const gdb_byte *mac_end, |
cf2c3c16 | 24862 | struct macro_source_file *current_file, |
43f3e411 | 24863 | struct line_header *lh, |
cf2c3c16 | 24864 | struct dwarf2_section_info *section, |
36586728 | 24865 | int section_is_gnu, int section_is_dwz, |
cf2c3c16 | 24866 | unsigned int offset_size, |
8fc3fc34 | 24867 | htab_t include_hash) |
cf2c3c16 | 24868 | { |
804d2729 TT |
24869 | struct dwarf2_per_objfile *dwarf2_per_objfile |
24870 | = cu->per_cu->dwarf2_per_objfile; | |
4d663531 | 24871 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
cf2c3c16 TT |
24872 | enum dwarf_macro_record_type macinfo_type; |
24873 | int at_commandline; | |
d521ce57 | 24874 | const gdb_byte *opcode_definitions[256]; |
757a13d0 | 24875 | |
cf2c3c16 TT |
24876 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, |
24877 | &offset_size, section_is_gnu); | |
24878 | if (mac_ptr == NULL) | |
24879 | { | |
24880 | /* We already issued a complaint. */ | |
24881 | return; | |
24882 | } | |
757a13d0 JK |
24883 | |
24884 | /* Determines if GDB is still before first DW_MACINFO_start_file. If true | |
24885 | GDB is still reading the definitions from command line. First | |
24886 | DW_MACINFO_start_file will need to be ignored as it was already executed | |
24887 | to create CURRENT_FILE for the main source holding also the command line | |
24888 | definitions. On first met DW_MACINFO_start_file this flag is reset to | |
24889 | normally execute all the remaining DW_MACINFO_start_file macinfos. */ | |
24890 | ||
24891 | at_commandline = 1; | |
24892 | ||
24893 | do | |
24894 | { | |
24895 | /* Do we at least have room for a macinfo type byte? */ | |
24896 | if (mac_ptr >= mac_end) | |
24897 | { | |
f664829e | 24898 | dwarf2_section_buffer_overflow_complaint (section); |
757a13d0 JK |
24899 | break; |
24900 | } | |
24901 | ||
aead7601 | 24902 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
757a13d0 JK |
24903 | mac_ptr++; |
24904 | ||
cf2c3c16 TT |
24905 | /* Note that we rely on the fact that the corresponding GNU and |
24906 | DWARF constants are the same. */ | |
132448f8 SM |
24907 | DIAGNOSTIC_PUSH |
24908 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
757a13d0 JK |
24909 | switch (macinfo_type) |
24910 | { | |
24911 | /* A zero macinfo type indicates the end of the macro | |
24912 | information. */ | |
24913 | case 0: | |
24914 | break; | |
2e276125 | 24915 | |
0af92d60 JK |
24916 | case DW_MACRO_define: |
24917 | case DW_MACRO_undef: | |
24918 | case DW_MACRO_define_strp: | |
24919 | case DW_MACRO_undef_strp: | |
24920 | case DW_MACRO_define_sup: | |
24921 | case DW_MACRO_undef_sup: | |
2e276125 | 24922 | { |
891d2f0b | 24923 | unsigned int bytes_read; |
2e276125 | 24924 | int line; |
d521ce57 | 24925 | const char *body; |
cf2c3c16 | 24926 | int is_define; |
2e276125 | 24927 | |
cf2c3c16 TT |
24928 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); |
24929 | mac_ptr += bytes_read; | |
24930 | ||
0af92d60 JK |
24931 | if (macinfo_type == DW_MACRO_define |
24932 | || macinfo_type == DW_MACRO_undef) | |
cf2c3c16 TT |
24933 | { |
24934 | body = read_direct_string (abfd, mac_ptr, &bytes_read); | |
24935 | mac_ptr += bytes_read; | |
24936 | } | |
24937 | else | |
24938 | { | |
24939 | LONGEST str_offset; | |
24940 | ||
24941 | str_offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
24942 | mac_ptr += offset_size; | |
2e276125 | 24943 | |
0af92d60 JK |
24944 | if (macinfo_type == DW_MACRO_define_sup |
24945 | || macinfo_type == DW_MACRO_undef_sup | |
f7a35f02 | 24946 | || section_is_dwz) |
36586728 | 24947 | { |
ed2dc618 SM |
24948 | struct dwz_file *dwz |
24949 | = dwarf2_get_dwz_file (dwarf2_per_objfile); | |
36586728 | 24950 | |
ed2dc618 SM |
24951 | body = read_indirect_string_from_dwz (objfile, |
24952 | dwz, str_offset); | |
36586728 TT |
24953 | } |
24954 | else | |
ed2dc618 SM |
24955 | body = read_indirect_string_at_offset (dwarf2_per_objfile, |
24956 | abfd, str_offset); | |
cf2c3c16 TT |
24957 | } |
24958 | ||
0af92d60 JK |
24959 | is_define = (macinfo_type == DW_MACRO_define |
24960 | || macinfo_type == DW_MACRO_define_strp | |
24961 | || macinfo_type == DW_MACRO_define_sup); | |
2e276125 | 24962 | if (! current_file) |
757a13d0 JK |
24963 | { |
24964 | /* DWARF violation as no main source is present. */ | |
b98664d3 | 24965 | complaint (_("debug info with no main source gives macro %s " |
757a13d0 | 24966 | "on line %d: %s"), |
cf2c3c16 TT |
24967 | is_define ? _("definition") : _("undefinition"), |
24968 | line, body); | |
757a13d0 JK |
24969 | break; |
24970 | } | |
3e43a32a MS |
24971 | if ((line == 0 && !at_commandline) |
24972 | || (line != 0 && at_commandline)) | |
b98664d3 | 24973 | complaint (_("debug info gives %s macro %s with %s line %d: %s"), |
757a13d0 | 24974 | at_commandline ? _("command-line") : _("in-file"), |
cf2c3c16 | 24975 | is_define ? _("definition") : _("undefinition"), |
757a13d0 JK |
24976 | line == 0 ? _("zero") : _("non-zero"), line, body); |
24977 | ||
955b06fa | 24978 | if (body == NULL) |
7bede828 | 24979 | { |
955b06fa SDJ |
24980 | /* Fedora's rpm-build's "debugedit" binary |
24981 | corrupted .debug_macro sections. | |
24982 | ||
24983 | For more info, see | |
24984 | https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */ | |
24985 | complaint (_("debug info gives %s invalid macro %s " | |
24986 | "without body (corrupted?) at line %d " | |
24987 | "on file %s"), | |
24988 | at_commandline ? _("command-line") : _("in-file"), | |
24989 | is_define ? _("definition") : _("undefinition"), | |
24990 | line, current_file->filename); | |
7bede828 | 24991 | } |
955b06fa SDJ |
24992 | else if (is_define) |
24993 | parse_macro_definition (current_file, line, body); | |
cf2c3c16 TT |
24994 | else |
24995 | { | |
0af92d60 JK |
24996 | gdb_assert (macinfo_type == DW_MACRO_undef |
24997 | || macinfo_type == DW_MACRO_undef_strp | |
24998 | || macinfo_type == DW_MACRO_undef_sup); | |
cf2c3c16 TT |
24999 | macro_undef (current_file, line, body); |
25000 | } | |
2e276125 JB |
25001 | } |
25002 | break; | |
25003 | ||
0af92d60 | 25004 | case DW_MACRO_start_file: |
2e276125 | 25005 | { |
891d2f0b | 25006 | unsigned int bytes_read; |
2e276125 JB |
25007 | int line, file; |
25008 | ||
25009 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25010 | mac_ptr += bytes_read; | |
25011 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25012 | mac_ptr += bytes_read; | |
25013 | ||
3e43a32a MS |
25014 | if ((line == 0 && !at_commandline) |
25015 | || (line != 0 && at_commandline)) | |
b98664d3 | 25016 | complaint (_("debug info gives source %d included " |
757a13d0 JK |
25017 | "from %s at %s line %d"), |
25018 | file, at_commandline ? _("command-line") : _("file"), | |
25019 | line == 0 ? _("zero") : _("non-zero"), line); | |
25020 | ||
25021 | if (at_commandline) | |
25022 | { | |
0af92d60 | 25023 | /* This DW_MACRO_start_file was executed in the |
cf2c3c16 | 25024 | pass one. */ |
757a13d0 JK |
25025 | at_commandline = 0; |
25026 | } | |
25027 | else | |
804d2729 TT |
25028 | current_file = macro_start_file (cu, file, line, current_file, |
25029 | lh); | |
2e276125 JB |
25030 | } |
25031 | break; | |
25032 | ||
0af92d60 | 25033 | case DW_MACRO_end_file: |
2e276125 | 25034 | if (! current_file) |
b98664d3 | 25035 | complaint (_("macro debug info has an unmatched " |
3e43a32a | 25036 | "`close_file' directive")); |
2e276125 JB |
25037 | else |
25038 | { | |
25039 | current_file = current_file->included_by; | |
25040 | if (! current_file) | |
25041 | { | |
cf2c3c16 | 25042 | enum dwarf_macro_record_type next_type; |
2e276125 JB |
25043 | |
25044 | /* GCC circa March 2002 doesn't produce the zero | |
25045 | type byte marking the end of the compilation | |
25046 | unit. Complain if it's not there, but exit no | |
25047 | matter what. */ | |
25048 | ||
25049 | /* Do we at least have room for a macinfo type byte? */ | |
25050 | if (mac_ptr >= mac_end) | |
25051 | { | |
f664829e | 25052 | dwarf2_section_buffer_overflow_complaint (section); |
2e276125 JB |
25053 | return; |
25054 | } | |
25055 | ||
25056 | /* We don't increment mac_ptr here, so this is just | |
25057 | a look-ahead. */ | |
aead7601 SM |
25058 | next_type |
25059 | = (enum dwarf_macro_record_type) read_1_byte (abfd, | |
25060 | mac_ptr); | |
2e276125 | 25061 | if (next_type != 0) |
b98664d3 | 25062 | complaint (_("no terminating 0-type entry for " |
3e43a32a | 25063 | "macros in `.debug_macinfo' section")); |
2e276125 JB |
25064 | |
25065 | return; | |
25066 | } | |
25067 | } | |
25068 | break; | |
25069 | ||
0af92d60 JK |
25070 | case DW_MACRO_import: |
25071 | case DW_MACRO_import_sup: | |
cf2c3c16 TT |
25072 | { |
25073 | LONGEST offset; | |
8fc3fc34 | 25074 | void **slot; |
a036ba48 TT |
25075 | bfd *include_bfd = abfd; |
25076 | struct dwarf2_section_info *include_section = section; | |
d521ce57 | 25077 | const gdb_byte *include_mac_end = mac_end; |
a036ba48 | 25078 | int is_dwz = section_is_dwz; |
d521ce57 | 25079 | const gdb_byte *new_mac_ptr; |
cf2c3c16 TT |
25080 | |
25081 | offset = read_offset_1 (abfd, mac_ptr, offset_size); | |
25082 | mac_ptr += offset_size; | |
25083 | ||
0af92d60 | 25084 | if (macinfo_type == DW_MACRO_import_sup) |
a036ba48 | 25085 | { |
ed2dc618 | 25086 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
a036ba48 | 25087 | |
4d663531 | 25088 | dwarf2_read_section (objfile, &dwz->macro); |
a036ba48 | 25089 | |
a036ba48 | 25090 | include_section = &dwz->macro; |
a32a8923 | 25091 | include_bfd = get_section_bfd_owner (include_section); |
a036ba48 TT |
25092 | include_mac_end = dwz->macro.buffer + dwz->macro.size; |
25093 | is_dwz = 1; | |
25094 | } | |
25095 | ||
25096 | new_mac_ptr = include_section->buffer + offset; | |
25097 | slot = htab_find_slot (include_hash, new_mac_ptr, INSERT); | |
25098 | ||
8fc3fc34 TT |
25099 | if (*slot != NULL) |
25100 | { | |
25101 | /* This has actually happened; see | |
25102 | http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */ | |
b98664d3 | 25103 | complaint (_("recursive DW_MACRO_import in " |
8fc3fc34 TT |
25104 | ".debug_macro section")); |
25105 | } | |
25106 | else | |
25107 | { | |
d521ce57 | 25108 | *slot = (void *) new_mac_ptr; |
36586728 | 25109 | |
804d2729 | 25110 | dwarf_decode_macro_bytes (cu, include_bfd, new_mac_ptr, |
43f3e411 | 25111 | include_mac_end, current_file, lh, |
36586728 | 25112 | section, section_is_gnu, is_dwz, |
4d663531 | 25113 | offset_size, include_hash); |
8fc3fc34 | 25114 | |
d521ce57 | 25115 | htab_remove_elt (include_hash, (void *) new_mac_ptr); |
8fc3fc34 | 25116 | } |
cf2c3c16 TT |
25117 | } |
25118 | break; | |
25119 | ||
2e276125 | 25120 | case DW_MACINFO_vendor_ext: |
cf2c3c16 TT |
25121 | if (!section_is_gnu) |
25122 | { | |
25123 | unsigned int bytes_read; | |
2e276125 | 25124 | |
ac298888 TT |
25125 | /* This reads the constant, but since we don't recognize |
25126 | any vendor extensions, we ignore it. */ | |
25127 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
cf2c3c16 TT |
25128 | mac_ptr += bytes_read; |
25129 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
25130 | mac_ptr += bytes_read; | |
2e276125 | 25131 | |
cf2c3c16 TT |
25132 | /* We don't recognize any vendor extensions. */ |
25133 | break; | |
25134 | } | |
25135 | /* FALLTHROUGH */ | |
25136 | ||
25137 | default: | |
25138 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 25139 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
25140 | section); |
25141 | if (mac_ptr == NULL) | |
25142 | return; | |
25143 | break; | |
2e276125 | 25144 | } |
132448f8 | 25145 | DIAGNOSTIC_POP |
757a13d0 | 25146 | } while (macinfo_type != 0); |
2e276125 | 25147 | } |
8e19ed76 | 25148 | |
cf2c3c16 | 25149 | static void |
09262596 | 25150 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, |
43f3e411 | 25151 | int section_is_gnu) |
cf2c3c16 | 25152 | { |
518817b3 SM |
25153 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25154 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 25155 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
09262596 DE |
25156 | struct line_header *lh = cu->line_header; |
25157 | bfd *abfd; | |
d521ce57 | 25158 | const gdb_byte *mac_ptr, *mac_end; |
cf2c3c16 TT |
25159 | struct macro_source_file *current_file = 0; |
25160 | enum dwarf_macro_record_type macinfo_type; | |
25161 | unsigned int offset_size = cu->header.offset_size; | |
d521ce57 | 25162 | const gdb_byte *opcode_definitions[256]; |
8fc3fc34 | 25163 | void **slot; |
09262596 DE |
25164 | struct dwarf2_section_info *section; |
25165 | const char *section_name; | |
25166 | ||
25167 | if (cu->dwo_unit != NULL) | |
25168 | { | |
25169 | if (section_is_gnu) | |
25170 | { | |
25171 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
25172 | section_name = ".debug_macro.dwo"; | |
25173 | } | |
25174 | else | |
25175 | { | |
25176 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
25177 | section_name = ".debug_macinfo.dwo"; | |
25178 | } | |
25179 | } | |
25180 | else | |
25181 | { | |
25182 | if (section_is_gnu) | |
25183 | { | |
25184 | section = &dwarf2_per_objfile->macro; | |
25185 | section_name = ".debug_macro"; | |
25186 | } | |
25187 | else | |
25188 | { | |
25189 | section = &dwarf2_per_objfile->macinfo; | |
25190 | section_name = ".debug_macinfo"; | |
25191 | } | |
25192 | } | |
cf2c3c16 | 25193 | |
bb5ed363 | 25194 | dwarf2_read_section (objfile, section); |
cf2c3c16 TT |
25195 | if (section->buffer == NULL) |
25196 | { | |
b98664d3 | 25197 | complaint (_("missing %s section"), section_name); |
cf2c3c16 TT |
25198 | return; |
25199 | } | |
a32a8923 | 25200 | abfd = get_section_bfd_owner (section); |
cf2c3c16 TT |
25201 | |
25202 | /* First pass: Find the name of the base filename. | |
25203 | This filename is needed in order to process all macros whose definition | |
25204 | (or undefinition) comes from the command line. These macros are defined | |
25205 | before the first DW_MACINFO_start_file entry, and yet still need to be | |
25206 | associated to the base file. | |
25207 | ||
25208 | To determine the base file name, we scan the macro definitions until we | |
25209 | reach the first DW_MACINFO_start_file entry. We then initialize | |
25210 | CURRENT_FILE accordingly so that any macro definition found before the | |
25211 | first DW_MACINFO_start_file can still be associated to the base file. */ | |
25212 | ||
25213 | mac_ptr = section->buffer + offset; | |
25214 | mac_end = section->buffer + section->size; | |
25215 | ||
25216 | mac_ptr = dwarf_parse_macro_header (opcode_definitions, abfd, mac_ptr, | |
25217 | &offset_size, section_is_gnu); | |
25218 | if (mac_ptr == NULL) | |
25219 | { | |
25220 | /* We already issued a complaint. */ | |
25221 | return; | |
25222 | } | |
25223 | ||
25224 | do | |
25225 | { | |
25226 | /* Do we at least have room for a macinfo type byte? */ | |
25227 | if (mac_ptr >= mac_end) | |
25228 | { | |
25229 | /* Complaint is printed during the second pass as GDB will probably | |
25230 | stop the first pass earlier upon finding | |
25231 | DW_MACINFO_start_file. */ | |
25232 | break; | |
25233 | } | |
25234 | ||
aead7601 | 25235 | macinfo_type = (enum dwarf_macro_record_type) read_1_byte (abfd, mac_ptr); |
cf2c3c16 TT |
25236 | mac_ptr++; |
25237 | ||
25238 | /* Note that we rely on the fact that the corresponding GNU and | |
25239 | DWARF constants are the same. */ | |
132448f8 SM |
25240 | DIAGNOSTIC_PUSH |
25241 | DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES | |
cf2c3c16 TT |
25242 | switch (macinfo_type) |
25243 | { | |
25244 | /* A zero macinfo type indicates the end of the macro | |
25245 | information. */ | |
25246 | case 0: | |
25247 | break; | |
25248 | ||
0af92d60 JK |
25249 | case DW_MACRO_define: |
25250 | case DW_MACRO_undef: | |
cf2c3c16 TT |
25251 | /* Only skip the data by MAC_PTR. */ |
25252 | { | |
25253 | unsigned int bytes_read; | |
25254 | ||
25255 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25256 | mac_ptr += bytes_read; | |
25257 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
25258 | mac_ptr += bytes_read; | |
25259 | } | |
25260 | break; | |
25261 | ||
0af92d60 | 25262 | case DW_MACRO_start_file: |
cf2c3c16 TT |
25263 | { |
25264 | unsigned int bytes_read; | |
25265 | int line, file; | |
25266 | ||
25267 | line = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25268 | mac_ptr += bytes_read; | |
25269 | file = read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25270 | mac_ptr += bytes_read; | |
25271 | ||
804d2729 | 25272 | current_file = macro_start_file (cu, file, line, current_file, lh); |
cf2c3c16 TT |
25273 | } |
25274 | break; | |
25275 | ||
0af92d60 | 25276 | case DW_MACRO_end_file: |
cf2c3c16 TT |
25277 | /* No data to skip by MAC_PTR. */ |
25278 | break; | |
25279 | ||
0af92d60 JK |
25280 | case DW_MACRO_define_strp: |
25281 | case DW_MACRO_undef_strp: | |
25282 | case DW_MACRO_define_sup: | |
25283 | case DW_MACRO_undef_sup: | |
cf2c3c16 TT |
25284 | { |
25285 | unsigned int bytes_read; | |
25286 | ||
25287 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25288 | mac_ptr += bytes_read; | |
25289 | mac_ptr += offset_size; | |
25290 | } | |
25291 | break; | |
25292 | ||
0af92d60 JK |
25293 | case DW_MACRO_import: |
25294 | case DW_MACRO_import_sup: | |
cf2c3c16 | 25295 | /* Note that, according to the spec, a transparent include |
0af92d60 | 25296 | chain cannot call DW_MACRO_start_file. So, we can just |
cf2c3c16 TT |
25297 | skip this opcode. */ |
25298 | mac_ptr += offset_size; | |
25299 | break; | |
25300 | ||
25301 | case DW_MACINFO_vendor_ext: | |
25302 | /* Only skip the data by MAC_PTR. */ | |
25303 | if (!section_is_gnu) | |
25304 | { | |
25305 | unsigned int bytes_read; | |
25306 | ||
25307 | read_unsigned_leb128 (abfd, mac_ptr, &bytes_read); | |
25308 | mac_ptr += bytes_read; | |
25309 | read_direct_string (abfd, mac_ptr, &bytes_read); | |
25310 | mac_ptr += bytes_read; | |
25311 | } | |
25312 | /* FALLTHROUGH */ | |
25313 | ||
25314 | default: | |
25315 | mac_ptr = skip_unknown_opcode (macinfo_type, opcode_definitions, | |
f664829e | 25316 | mac_ptr, mac_end, abfd, offset_size, |
cf2c3c16 TT |
25317 | section); |
25318 | if (mac_ptr == NULL) | |
25319 | return; | |
25320 | break; | |
25321 | } | |
132448f8 | 25322 | DIAGNOSTIC_POP |
cf2c3c16 TT |
25323 | } while (macinfo_type != 0 && current_file == NULL); |
25324 | ||
25325 | /* Second pass: Process all entries. | |
25326 | ||
25327 | Use the AT_COMMAND_LINE flag to determine whether we are still processing | |
25328 | command-line macro definitions/undefinitions. This flag is unset when we | |
25329 | reach the first DW_MACINFO_start_file entry. */ | |
25330 | ||
fc4007c9 TT |
25331 | htab_up include_hash (htab_create_alloc (1, htab_hash_pointer, |
25332 | htab_eq_pointer, | |
25333 | NULL, xcalloc, xfree)); | |
8fc3fc34 | 25334 | mac_ptr = section->buffer + offset; |
fc4007c9 | 25335 | slot = htab_find_slot (include_hash.get (), mac_ptr, INSERT); |
d521ce57 | 25336 | *slot = (void *) mac_ptr; |
804d2729 | 25337 | dwarf_decode_macro_bytes (cu, abfd, mac_ptr, mac_end, |
43f3e411 | 25338 | current_file, lh, section, |
fc4007c9 TT |
25339 | section_is_gnu, 0, offset_size, |
25340 | include_hash.get ()); | |
cf2c3c16 TT |
25341 | } |
25342 | ||
8e19ed76 | 25343 | /* Check if the attribute's form is a DW_FORM_block* |
0963b4bd | 25344 | if so return true else false. */ |
380bca97 | 25345 | |
8e19ed76 | 25346 | static int |
6e5a29e1 | 25347 | attr_form_is_block (const struct attribute *attr) |
8e19ed76 PS |
25348 | { |
25349 | return (attr == NULL ? 0 : | |
25350 | attr->form == DW_FORM_block1 | |
25351 | || attr->form == DW_FORM_block2 | |
25352 | || attr->form == DW_FORM_block4 | |
2dc7f7b3 TT |
25353 | || attr->form == DW_FORM_block |
25354 | || attr->form == DW_FORM_exprloc); | |
8e19ed76 | 25355 | } |
4c2df51b | 25356 | |
c6a0999f JB |
25357 | /* Return non-zero if ATTR's value is a section offset --- classes |
25358 | lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise. | |
25359 | You may use DW_UNSND (attr) to retrieve such offsets. | |
25360 | ||
25361 | Section 7.5.4, "Attribute Encodings", explains that no attribute | |
25362 | may have a value that belongs to more than one of these classes; it | |
25363 | would be ambiguous if we did, because we use the same forms for all | |
25364 | of them. */ | |
380bca97 | 25365 | |
3690dd37 | 25366 | static int |
6e5a29e1 | 25367 | attr_form_is_section_offset (const struct attribute *attr) |
3690dd37 JB |
25368 | { |
25369 | return (attr->form == DW_FORM_data4 | |
2dc7f7b3 TT |
25370 | || attr->form == DW_FORM_data8 |
25371 | || attr->form == DW_FORM_sec_offset); | |
3690dd37 JB |
25372 | } |
25373 | ||
3690dd37 JB |
25374 | /* Return non-zero if ATTR's value falls in the 'constant' class, or |
25375 | zero otherwise. When this function returns true, you can apply | |
25376 | dwarf2_get_attr_constant_value to it. | |
25377 | ||
25378 | However, note that for some attributes you must check | |
25379 | attr_form_is_section_offset before using this test. DW_FORM_data4 | |
25380 | and DW_FORM_data8 are members of both the constant class, and of | |
25381 | the classes that contain offsets into other debug sections | |
25382 | (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says | |
25383 | that, if an attribute's can be either a constant or one of the | |
25384 | section offset classes, DW_FORM_data4 and DW_FORM_data8 should be | |
0224619f JK |
25385 | taken as section offsets, not constants. |
25386 | ||
25387 | DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value | |
25388 | cannot handle that. */ | |
380bca97 | 25389 | |
3690dd37 | 25390 | static int |
6e5a29e1 | 25391 | attr_form_is_constant (const struct attribute *attr) |
3690dd37 JB |
25392 | { |
25393 | switch (attr->form) | |
25394 | { | |
25395 | case DW_FORM_sdata: | |
25396 | case DW_FORM_udata: | |
25397 | case DW_FORM_data1: | |
25398 | case DW_FORM_data2: | |
25399 | case DW_FORM_data4: | |
25400 | case DW_FORM_data8: | |
663c44ac | 25401 | case DW_FORM_implicit_const: |
3690dd37 JB |
25402 | return 1; |
25403 | default: | |
25404 | return 0; | |
25405 | } | |
25406 | } | |
25407 | ||
7771576e SA |
25408 | |
25409 | /* DW_ADDR is always stored already as sect_offset; despite for the forms | |
25410 | besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */ | |
25411 | ||
25412 | static int | |
6e5a29e1 | 25413 | attr_form_is_ref (const struct attribute *attr) |
7771576e SA |
25414 | { |
25415 | switch (attr->form) | |
25416 | { | |
25417 | case DW_FORM_ref_addr: | |
25418 | case DW_FORM_ref1: | |
25419 | case DW_FORM_ref2: | |
25420 | case DW_FORM_ref4: | |
25421 | case DW_FORM_ref8: | |
25422 | case DW_FORM_ref_udata: | |
25423 | case DW_FORM_GNU_ref_alt: | |
25424 | return 1; | |
25425 | default: | |
25426 | return 0; | |
25427 | } | |
25428 | } | |
25429 | ||
3019eac3 DE |
25430 | /* Return the .debug_loc section to use for CU. |
25431 | For DWO files use .debug_loc.dwo. */ | |
25432 | ||
25433 | static struct dwarf2_section_info * | |
25434 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
25435 | { | |
518817b3 SM |
25436 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25437 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 25438 | |
3019eac3 | 25439 | if (cu->dwo_unit) |
43988095 JK |
25440 | { |
25441 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 25442 | |
43988095 JK |
25443 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
25444 | } | |
25445 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
25446 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
25447 | } |
25448 | ||
8cf6f0b1 TT |
25449 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
25450 | ||
25451 | static void | |
25452 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
25453 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 25454 | const struct attribute *attr) |
8cf6f0b1 | 25455 | { |
518817b3 SM |
25456 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25457 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
25458 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
25459 | ||
25460 | dwarf2_read_section (dwarf2_per_objfile->objfile, section); | |
8cf6f0b1 TT |
25461 | |
25462 | baton->per_cu = cu->per_cu; | |
25463 | gdb_assert (baton->per_cu); | |
25464 | /* We don't know how long the location list is, but make sure we | |
25465 | don't run off the edge of the section. */ | |
3019eac3 DE |
25466 | baton->size = section->size - DW_UNSND (attr); |
25467 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 25468 | baton->base_address = cu->base_address; |
f664829e | 25469 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
25470 | } |
25471 | ||
4c2df51b | 25472 | static void |
ff39bb5e | 25473 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 25474 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 25475 | { |
518817b3 SM |
25476 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25477 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 25478 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 25479 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 25480 | |
3690dd37 | 25481 | if (attr_form_is_section_offset (attr) |
3019eac3 | 25482 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
25483 | the section. If so, fall through to the complaint in the |
25484 | other branch. */ | |
3019eac3 | 25485 | && DW_UNSND (attr) < dwarf2_section_size (objfile, section)) |
4c2df51b | 25486 | { |
0d53c4c4 | 25487 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 25488 | |
8d749320 | 25489 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 25490 | |
8cf6f0b1 | 25491 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 25492 | |
d00adf39 | 25493 | if (cu->base_known == 0) |
b98664d3 | 25494 | complaint (_("Location list used without " |
3e43a32a | 25495 | "specifying the CU base address.")); |
4c2df51b | 25496 | |
f1e6e072 TT |
25497 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
25498 | ? dwarf2_loclist_block_index | |
25499 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
25500 | SYMBOL_LOCATION_BATON (sym) = baton; |
25501 | } | |
25502 | else | |
25503 | { | |
25504 | struct dwarf2_locexpr_baton *baton; | |
25505 | ||
8d749320 | 25506 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
25507 | baton->per_cu = cu->per_cu; |
25508 | gdb_assert (baton->per_cu); | |
0d53c4c4 DJ |
25509 | |
25510 | if (attr_form_is_block (attr)) | |
25511 | { | |
25512 | /* Note that we're just copying the block's data pointer | |
25513 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
25514 | info_buffer for SYM's objfile; right now we never release |
25515 | that buffer, but when we do clean up properly this may | |
25516 | need to change. */ | |
0d53c4c4 DJ |
25517 | baton->size = DW_BLOCK (attr)->size; |
25518 | baton->data = DW_BLOCK (attr)->data; | |
25519 | } | |
25520 | else | |
25521 | { | |
25522 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 25523 | sym->natural_name ()); |
0d53c4c4 | 25524 | baton->size = 0; |
0d53c4c4 | 25525 | } |
6e70227d | 25526 | |
f1e6e072 TT |
25527 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
25528 | ? dwarf2_locexpr_block_index | |
25529 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
25530 | SYMBOL_LOCATION_BATON (sym) = baton; |
25531 | } | |
4c2df51b | 25532 | } |
6502dd73 | 25533 | |
9aa1f1e3 TT |
25534 | /* Return the OBJFILE associated with the compilation unit CU. If CU |
25535 | came from a separate debuginfo file, then the master objfile is | |
25536 | returned. */ | |
ae0d2f24 UW |
25537 | |
25538 | struct objfile * | |
25539 | dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *per_cu) | |
25540 | { | |
e3b94546 | 25541 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
25542 | |
25543 | /* Return the master objfile, so that we can report and look up the | |
25544 | correct file containing this variable. */ | |
25545 | if (objfile->separate_debug_objfile_backlink) | |
25546 | objfile = objfile->separate_debug_objfile_backlink; | |
25547 | ||
25548 | return objfile; | |
25549 | } | |
25550 | ||
96408a79 SA |
25551 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
25552 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
25553 | CU_HEADERP first. */ | |
25554 | ||
25555 | static const struct comp_unit_head * | |
25556 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
25557 | struct dwarf2_per_cu_data *per_cu) | |
25558 | { | |
d521ce57 | 25559 | const gdb_byte *info_ptr; |
96408a79 SA |
25560 | |
25561 | if (per_cu->cu) | |
25562 | return &per_cu->cu->header; | |
25563 | ||
9c541725 | 25564 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
25565 | |
25566 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
25567 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
25568 | rcuh_kind::COMPILE); | |
96408a79 SA |
25569 | |
25570 | return cu_headerp; | |
25571 | } | |
25572 | ||
ae0d2f24 UW |
25573 | /* Return the address size given in the compilation unit header for CU. */ |
25574 | ||
98714339 | 25575 | int |
ae0d2f24 UW |
25576 | dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *per_cu) |
25577 | { | |
96408a79 SA |
25578 | struct comp_unit_head cu_header_local; |
25579 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 25580 | |
96408a79 SA |
25581 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
25582 | ||
25583 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
25584 | } |
25585 | ||
9eae7c52 TT |
25586 | /* Return the offset size given in the compilation unit header for CU. */ |
25587 | ||
25588 | int | |
25589 | dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *per_cu) | |
25590 | { | |
96408a79 SA |
25591 | struct comp_unit_head cu_header_local; |
25592 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 25593 | |
96408a79 SA |
25594 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); |
25595 | ||
25596 | return cu_headerp->offset_size; | |
25597 | } | |
25598 | ||
25599 | /* See its dwarf2loc.h declaration. */ | |
25600 | ||
25601 | int | |
25602 | dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *per_cu) | |
25603 | { | |
25604 | struct comp_unit_head cu_header_local; | |
25605 | const struct comp_unit_head *cu_headerp; | |
25606 | ||
25607 | cu_headerp = per_cu_header_read_in (&cu_header_local, per_cu); | |
25608 | ||
25609 | if (cu_headerp->version == 2) | |
25610 | return cu_headerp->addr_size; | |
25611 | else | |
25612 | return cu_headerp->offset_size; | |
181cebd4 JK |
25613 | } |
25614 | ||
9aa1f1e3 TT |
25615 | /* Return the text offset of the CU. The returned offset comes from |
25616 | this CU's objfile. If this objfile came from a separate debuginfo | |
25617 | file, then the offset may be different from the corresponding | |
25618 | offset in the parent objfile. */ | |
25619 | ||
25620 | CORE_ADDR | |
25621 | dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *per_cu) | |
25622 | { | |
e3b94546 | 25623 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
9aa1f1e3 | 25624 | |
6a053cb1 | 25625 | return objfile->section_offsets[SECT_OFF_TEXT (objfile)]; |
9aa1f1e3 TT |
25626 | } |
25627 | ||
9a49df9d AB |
25628 | /* Return a type that is a generic pointer type, the size of which matches |
25629 | the address size given in the compilation unit header for PER_CU. */ | |
25630 | static struct type * | |
25631 | dwarf2_per_cu_addr_type (struct dwarf2_per_cu_data *per_cu) | |
25632 | { | |
25633 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; | |
25634 | struct type *void_type = objfile_type (objfile)->builtin_void; | |
25635 | struct type *addr_type = lookup_pointer_type (void_type); | |
25636 | int addr_size = dwarf2_per_cu_addr_size (per_cu); | |
25637 | ||
25638 | if (TYPE_LENGTH (addr_type) == addr_size) | |
25639 | return addr_type; | |
25640 | ||
25641 | addr_type | |
25642 | = dwarf2_per_cu_addr_sized_int_type (per_cu, TYPE_UNSIGNED (addr_type)); | |
25643 | return addr_type; | |
25644 | } | |
25645 | ||
43988095 JK |
25646 | /* Return DWARF version number of PER_CU. */ |
25647 | ||
25648 | short | |
25649 | dwarf2_version (struct dwarf2_per_cu_data *per_cu) | |
25650 | { | |
25651 | return per_cu->dwarf_version; | |
25652 | } | |
25653 | ||
348e048f DE |
25654 | /* Locate the .debug_info compilation unit from CU's objfile which contains |
25655 | the DIE at OFFSET. Raises an error on failure. */ | |
ae038cb0 DJ |
25656 | |
25657 | static struct dwarf2_per_cu_data * | |
9c541725 | 25658 | dwarf2_find_containing_comp_unit (sect_offset sect_off, |
36586728 | 25659 | unsigned int offset_in_dwz, |
ed2dc618 | 25660 | struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
25661 | { |
25662 | struct dwarf2_per_cu_data *this_cu; | |
25663 | int low, high; | |
25664 | ||
ae038cb0 | 25665 | low = 0; |
b76e467d | 25666 | high = dwarf2_per_objfile->all_comp_units.size () - 1; |
ae038cb0 DJ |
25667 | while (high > low) |
25668 | { | |
36586728 | 25669 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 25670 | int mid = low + (high - low) / 2; |
9a619af0 | 25671 | |
36586728 | 25672 | mid_cu = dwarf2_per_objfile->all_comp_units[mid]; |
36586728 | 25673 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 25674 | || (mid_cu->is_dwz == offset_in_dwz |
45b8ae0c | 25675 | && mid_cu->sect_off + mid_cu->length >= sect_off)) |
ae038cb0 DJ |
25676 | high = mid; |
25677 | else | |
25678 | low = mid + 1; | |
25679 | } | |
25680 | gdb_assert (low == high); | |
36586728 | 25681 | this_cu = dwarf2_per_objfile->all_comp_units[low]; |
45b8ae0c | 25682 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 25683 | { |
36586728 | 25684 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 25685 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
25686 | "offset %s [in module %s]"), |
25687 | sect_offset_str (sect_off), | |
ed2dc618 | 25688 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 25689 | |
9c541725 PA |
25690 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
25691 | <= sect_off); | |
ae038cb0 DJ |
25692 | return dwarf2_per_objfile->all_comp_units[low-1]; |
25693 | } | |
25694 | else | |
25695 | { | |
b76e467d | 25696 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 25697 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 25698 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 25699 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
25700 | return this_cu; |
25701 | } | |
25702 | } | |
25703 | ||
23745b47 | 25704 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 25705 | |
fcd3b13d SM |
25706 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
25707 | : per_cu (per_cu_), | |
9068261f AB |
25708 | mark (false), |
25709 | has_loclist (false), | |
25710 | checked_producer (false), | |
25711 | producer_is_gxx_lt_4_6 (false), | |
25712 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 25713 | producer_is_icc (false), |
9068261f | 25714 | producer_is_icc_lt_14 (false), |
c258c396 | 25715 | producer_is_codewarrior (false), |
9068261f | 25716 | processing_has_namespace_info (false) |
93311388 | 25717 | { |
fcd3b13d SM |
25718 | per_cu->cu = this; |
25719 | } | |
25720 | ||
25721 | /* Destroy a dwarf2_cu. */ | |
25722 | ||
25723 | dwarf2_cu::~dwarf2_cu () | |
25724 | { | |
25725 | per_cu->cu = NULL; | |
9816fde3 JK |
25726 | } |
25727 | ||
25728 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
25729 | ||
25730 | static void | |
95554aad TT |
25731 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
25732 | enum language pretend_language) | |
9816fde3 JK |
25733 | { |
25734 | struct attribute *attr; | |
25735 | ||
25736 | /* Set the language we're debugging. */ | |
25737 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 25738 | if (attr != nullptr) |
9816fde3 JK |
25739 | set_cu_language (DW_UNSND (attr), cu); |
25740 | else | |
9cded63f | 25741 | { |
95554aad | 25742 | cu->language = pretend_language; |
9cded63f TT |
25743 | cu->language_defn = language_def (cu->language); |
25744 | } | |
dee91e82 | 25745 | |
7d45c7c3 | 25746 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
25747 | } |
25748 | ||
ae038cb0 DJ |
25749 | /* Increase the age counter on each cached compilation unit, and free |
25750 | any that are too old. */ | |
25751 | ||
25752 | static void | |
ed2dc618 | 25753 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
25754 | { |
25755 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
25756 | ||
25757 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
25758 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25759 | while (per_cu != NULL) | |
25760 | { | |
25761 | per_cu->cu->last_used ++; | |
b4f54984 | 25762 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
25763 | dwarf2_mark (per_cu->cu); |
25764 | per_cu = per_cu->cu->read_in_chain; | |
25765 | } | |
25766 | ||
25767 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25768 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25769 | while (per_cu != NULL) | |
25770 | { | |
25771 | struct dwarf2_per_cu_data *next_cu; | |
25772 | ||
25773 | next_cu = per_cu->cu->read_in_chain; | |
25774 | ||
25775 | if (!per_cu->cu->mark) | |
25776 | { | |
fcd3b13d | 25777 | delete per_cu->cu; |
ae038cb0 DJ |
25778 | *last_chain = next_cu; |
25779 | } | |
25780 | else | |
25781 | last_chain = &per_cu->cu->read_in_chain; | |
25782 | ||
25783 | per_cu = next_cu; | |
25784 | } | |
25785 | } | |
25786 | ||
25787 | /* Remove a single compilation unit from the cache. */ | |
25788 | ||
25789 | static void | |
dee91e82 | 25790 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
25791 | { |
25792 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
25793 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25794 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
25795 | |
25796 | per_cu = dwarf2_per_objfile->read_in_chain; | |
25797 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
25798 | while (per_cu != NULL) | |
25799 | { | |
25800 | struct dwarf2_per_cu_data *next_cu; | |
25801 | ||
25802 | next_cu = per_cu->cu->read_in_chain; | |
25803 | ||
dee91e82 | 25804 | if (per_cu == target_per_cu) |
ae038cb0 | 25805 | { |
fcd3b13d | 25806 | delete per_cu->cu; |
dee91e82 | 25807 | per_cu->cu = NULL; |
ae038cb0 DJ |
25808 | *last_chain = next_cu; |
25809 | break; | |
25810 | } | |
25811 | else | |
25812 | last_chain = &per_cu->cu->read_in_chain; | |
25813 | ||
25814 | per_cu = next_cu; | |
25815 | } | |
25816 | } | |
25817 | ||
dee91e82 DE |
25818 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
25819 | We store these in a hash table separate from the DIEs, and preserve them | |
25820 | when the DIEs are flushed out of cache. | |
25821 | ||
25822 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 25823 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
25824 | or the type may come from a DWO file. Furthermore, while it's more logical |
25825 | to use per_cu->section+offset, with Fission the section with the data is in | |
25826 | the DWO file but we don't know that section at the point we need it. | |
25827 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
25828 | because we can enter the lookup routine, get_die_type_at_offset, from | |
25829 | outside this file, and thus won't necessarily have PER_CU->cu. | |
25830 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 25831 | |
dee91e82 | 25832 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 25833 | { |
dee91e82 | 25834 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 25835 | sect_offset sect_off; |
1c379e20 DJ |
25836 | struct type *type; |
25837 | }; | |
25838 | ||
dee91e82 | 25839 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25840 | |
25841 | static hashval_t | |
dee91e82 | 25842 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 25843 | { |
9a3c8263 SM |
25844 | const struct dwarf2_per_cu_offset_and_type *ofs |
25845 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 25846 | |
9c541725 | 25847 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
25848 | } |
25849 | ||
dee91e82 | 25850 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
25851 | |
25852 | static int | |
dee91e82 | 25853 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 25854 | { |
9a3c8263 SM |
25855 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
25856 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
25857 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
25858 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 25859 | |
dee91e82 | 25860 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 25861 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
25862 | } |
25863 | ||
25864 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
25865 | table if necessary. For convenience, return TYPE. |
25866 | ||
25867 | The DIEs reading must have careful ordering to: | |
85102364 | 25868 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
25869 | reading current DIE. |
25870 | * Not trying to dereference contents of still incompletely read in types | |
25871 | while reading in other DIEs. | |
25872 | * Enable referencing still incompletely read in types just by a pointer to | |
25873 | the type without accessing its fields. | |
25874 | ||
25875 | Therefore caller should follow these rules: | |
25876 | * Try to fetch any prerequisite types we may need to build this DIE type | |
25877 | before building the type and calling set_die_type. | |
e71ec853 | 25878 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
25879 | possible before fetching more types to complete the current type. |
25880 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 25881 | |
f792889a | 25882 | static struct type * |
1c379e20 DJ |
25883 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
25884 | { | |
518817b3 SM |
25885 | struct dwarf2_per_objfile *dwarf2_per_objfile |
25886 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 25887 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 25888 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
25889 | struct attribute *attr; |
25890 | struct dynamic_prop prop; | |
1c379e20 | 25891 | |
b4ba55a1 JB |
25892 | /* For Ada types, make sure that the gnat-specific data is always |
25893 | initialized (if not already set). There are a few types where | |
25894 | we should not be doing so, because the type-specific area is | |
25895 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
25896 | where the type-specific area is used to store the floatformat). | |
25897 | But this is not a problem, because the gnat-specific information | |
25898 | is actually not needed for these types. */ | |
25899 | if (need_gnat_info (cu) | |
25900 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
25901 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
25902 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
25903 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
25904 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
25905 | && !HAVE_GNAT_AUX_INFO (type)) |
25906 | INIT_GNAT_SPECIFIC (type); | |
25907 | ||
3f2f83dd KB |
25908 | /* Read DW_AT_allocated and set in type. */ |
25909 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
25910 | if (attr_form_is_block (attr)) | |
25911 | { | |
9a49df9d AB |
25912 | struct type *prop_type |
25913 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
25914 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
50a82047 | 25915 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
25916 | } |
25917 | else if (attr != NULL) | |
25918 | { | |
b98664d3 | 25919 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 25920 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25921 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25922 | } |
25923 | ||
25924 | /* Read DW_AT_associated and set in type. */ | |
25925 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
25926 | if (attr_form_is_block (attr)) | |
25927 | { | |
9a49df9d AB |
25928 | struct type *prop_type |
25929 | = dwarf2_per_cu_addr_sized_int_type (cu->per_cu, false); | |
25930 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
50a82047 | 25931 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
25932 | } |
25933 | else if (attr != NULL) | |
25934 | { | |
b98664d3 | 25935 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 25936 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 25937 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
25938 | } |
25939 | ||
3cdcd0ce JB |
25940 | /* Read DW_AT_data_location and set in type. */ |
25941 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d AB |
25942 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
25943 | dwarf2_per_cu_addr_type (cu->per_cu))) | |
50a82047 | 25944 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 25945 | |
dee91e82 | 25946 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25947 | { |
dee91e82 DE |
25948 | dwarf2_per_objfile->die_type_hash = |
25949 | htab_create_alloc_ex (127, | |
25950 | per_cu_offset_and_type_hash, | |
25951 | per_cu_offset_and_type_eq, | |
25952 | NULL, | |
25953 | &objfile->objfile_obstack, | |
25954 | hashtab_obstack_allocate, | |
25955 | dummy_obstack_deallocate); | |
f792889a | 25956 | } |
1c379e20 | 25957 | |
dee91e82 | 25958 | ofs.per_cu = cu->per_cu; |
9c541725 | 25959 | ofs.sect_off = die->sect_off; |
1c379e20 | 25960 | ofs.type = type; |
dee91e82 DE |
25961 | slot = (struct dwarf2_per_cu_offset_and_type **) |
25962 | htab_find_slot (dwarf2_per_objfile->die_type_hash, &ofs, INSERT); | |
7e314c57 | 25963 | if (*slot) |
b98664d3 | 25964 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 25965 | sect_offset_str (die->sect_off)); |
8d749320 SM |
25966 | *slot = XOBNEW (&objfile->objfile_obstack, |
25967 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 25968 | **slot = ofs; |
f792889a | 25969 | return type; |
1c379e20 DJ |
25970 | } |
25971 | ||
9c541725 | 25972 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 25973 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
25974 | |
25975 | static struct type * | |
9c541725 | 25976 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 25977 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 25978 | { |
dee91e82 | 25979 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 25980 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 25981 | |
dee91e82 | 25982 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 25983 | return NULL; |
1c379e20 | 25984 | |
dee91e82 | 25985 | ofs.per_cu = per_cu; |
9c541725 | 25986 | ofs.sect_off = sect_off; |
9a3c8263 SM |
25987 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
25988 | htab_find (dwarf2_per_objfile->die_type_hash, &ofs)); | |
1c379e20 DJ |
25989 | if (slot) |
25990 | return slot->type; | |
25991 | else | |
25992 | return NULL; | |
25993 | } | |
25994 | ||
02142a6c | 25995 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
25996 | or return NULL if DIE does not have a saved type. */ |
25997 | ||
25998 | static struct type * | |
25999 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
26000 | { | |
9c541725 | 26001 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
26002 | } |
26003 | ||
10b3939b DJ |
26004 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
26005 | ||
26006 | static void | |
26007 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
26008 | struct dwarf2_per_cu_data *ref_per_cu) | |
26009 | { | |
26010 | void **slot; | |
26011 | ||
26012 | if (cu->dependencies == NULL) | |
26013 | cu->dependencies | |
26014 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
26015 | NULL, &cu->comp_unit_obstack, | |
26016 | hashtab_obstack_allocate, | |
26017 | dummy_obstack_deallocate); | |
26018 | ||
26019 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
26020 | if (*slot == NULL) | |
26021 | *slot = ref_per_cu; | |
26022 | } | |
1c379e20 | 26023 | |
f504f079 DE |
26024 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
26025 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
26026 | cache that we must keep because we are keeping CU. */ |
26027 | ||
10b3939b DJ |
26028 | static int |
26029 | dwarf2_mark_helper (void **slot, void *data) | |
26030 | { | |
26031 | struct dwarf2_per_cu_data *per_cu; | |
26032 | ||
26033 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
26034 | |
26035 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
26036 | reading of the chain. As such dependencies remain valid it is not much | |
26037 | useful to track and undo them during QUIT cleanups. */ | |
26038 | if (per_cu->cu == NULL) | |
26039 | return 1; | |
26040 | ||
10b3939b DJ |
26041 | if (per_cu->cu->mark) |
26042 | return 1; | |
9068261f | 26043 | per_cu->cu->mark = true; |
10b3939b DJ |
26044 | |
26045 | if (per_cu->cu->dependencies != NULL) | |
26046 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
26047 | ||
26048 | return 1; | |
26049 | } | |
26050 | ||
f504f079 DE |
26051 | /* Set the mark field in CU and in every other compilation unit in the |
26052 | cache that we must keep because we are keeping CU. */ | |
26053 | ||
ae038cb0 DJ |
26054 | static void |
26055 | dwarf2_mark (struct dwarf2_cu *cu) | |
26056 | { | |
26057 | if (cu->mark) | |
26058 | return; | |
9068261f | 26059 | cu->mark = true; |
10b3939b DJ |
26060 | if (cu->dependencies != NULL) |
26061 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
26062 | } |
26063 | ||
26064 | static void | |
26065 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
26066 | { | |
26067 | while (per_cu) | |
26068 | { | |
9068261f | 26069 | per_cu->cu->mark = false; |
ae038cb0 DJ |
26070 | per_cu = per_cu->cu->read_in_chain; |
26071 | } | |
72bf9492 DJ |
26072 | } |
26073 | ||
72bf9492 DJ |
26074 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
26075 | is its offset in .debug_info for this objfile. */ | |
26076 | ||
26077 | static hashval_t | |
26078 | partial_die_hash (const void *item) | |
26079 | { | |
9a3c8263 SM |
26080 | const struct partial_die_info *part_die |
26081 | = (const struct partial_die_info *) item; | |
9a619af0 | 26082 | |
9c541725 | 26083 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
26084 | } |
26085 | ||
26086 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
26087 | are equal if they have the same offset. */ | |
26088 | ||
26089 | static int | |
26090 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
26091 | { | |
9a3c8263 SM |
26092 | const struct partial_die_info *part_die_lhs |
26093 | = (const struct partial_die_info *) item_lhs; | |
26094 | const struct partial_die_info *part_die_rhs | |
26095 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 26096 | |
9c541725 | 26097 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
26098 | } |
26099 | ||
3c3bb058 AB |
26100 | struct cmd_list_element *set_dwarf_cmdlist; |
26101 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
26102 | |
26103 | static void | |
981a3fb3 | 26104 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 26105 | { |
b4f54984 | 26106 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 26107 | gdb_stdout); |
ae038cb0 DJ |
26108 | } |
26109 | ||
26110 | static void | |
981a3fb3 | 26111 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 26112 | { |
b4f54984 | 26113 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
26114 | } |
26115 | ||
491144b5 | 26116 | bool dwarf_always_disassemble; |
437afbb8 | 26117 | |
437afbb8 | 26118 | static void |
cd4fb1b2 SM |
26119 | show_dwarf_always_disassemble (struct ui_file *file, int from_tty, |
26120 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 26121 | { |
cd4fb1b2 SM |
26122 | fprintf_filtered (file, |
26123 | _("Whether to always disassemble " | |
26124 | "DWARF expressions is %s.\n"), | |
26125 | value); | |
9291a0cd TT |
26126 | } |
26127 | ||
9291a0cd | 26128 | static void |
cd4fb1b2 SM |
26129 | show_check_physname (struct ui_file *file, int from_tty, |
26130 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 26131 | { |
cd4fb1b2 SM |
26132 | fprintf_filtered (file, |
26133 | _("Whether to check \"physname\" is %s.\n"), | |
26134 | value); | |
9291a0cd TT |
26135 | } |
26136 | ||
cd4fb1b2 SM |
26137 | void |
26138 | _initialize_dwarf2_read (void) | |
9291a0cd | 26139 | { |
cd4fb1b2 SM |
26140 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
26141 | Set DWARF specific variables.\n\ | |
590042fc | 26142 | Configure DWARF variables such as the cache size."), |
cd4fb1b2 SM |
26143 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
26144 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 26145 | |
cd4fb1b2 | 26146 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
590042fc PW |
26147 | Show DWARF specific variables.\n\ |
26148 | Show DWARF variables such as the cache size."), | |
cd4fb1b2 SM |
26149 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
26150 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 26151 | |
cd4fb1b2 SM |
26152 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
26153 | &dwarf_max_cache_age, _("\ | |
26154 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
26155 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
26156 | A higher limit means that cached compilation units will be stored\n\ | |
26157 | in memory longer, and more total memory will be used. Zero disables\n\ | |
26158 | caching, which can slow down startup."), | |
26159 | NULL, | |
26160 | show_dwarf_max_cache_age, | |
26161 | &set_dwarf_cmdlist, | |
26162 | &show_dwarf_cmdlist); | |
156942c7 | 26163 | |
cd4fb1b2 SM |
26164 | add_setshow_boolean_cmd ("always-disassemble", class_obscure, |
26165 | &dwarf_always_disassemble, _("\ | |
26166 | Set whether `info address' always disassembles DWARF expressions."), _("\ | |
26167 | Show whether `info address' always disassembles DWARF expressions."), _("\ | |
26168 | When enabled, DWARF expressions are always printed in an assembly-like\n\ | |
26169 | syntax. When disabled, expressions will be printed in a more\n\ | |
26170 | conversational style, when possible."), | |
26171 | NULL, | |
26172 | show_dwarf_always_disassemble, | |
26173 | &set_dwarf_cmdlist, | |
26174 | &show_dwarf_cmdlist); | |
9291a0cd | 26175 | |
cd4fb1b2 SM |
26176 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
26177 | Set debugging of the DWARF reader."), _("\ | |
26178 | Show debugging of the DWARF reader."), _("\ | |
26179 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
26180 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
26181 | information. A value greater than 1 provides more verbose information."), | |
26182 | NULL, | |
26183 | NULL, | |
26184 | &setdebuglist, &showdebuglist); | |
9291a0cd | 26185 | |
cd4fb1b2 SM |
26186 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
26187 | Set debugging of the DWARF DIE reader."), _("\ | |
26188 | Show debugging of the DWARF DIE reader."), _("\ | |
26189 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
26190 | The value is the maximum depth to print."), | |
26191 | NULL, | |
26192 | NULL, | |
26193 | &setdebuglist, &showdebuglist); | |
9291a0cd | 26194 | |
cd4fb1b2 SM |
26195 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
26196 | Set debugging of the dwarf line reader."), _("\ | |
26197 | Show debugging of the dwarf line reader."), _("\ | |
26198 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
26199 | A value of 1 (one) provides basic information.\n\ | |
26200 | A value greater than 1 provides more verbose information."), | |
26201 | NULL, | |
26202 | NULL, | |
26203 | &setdebuglist, &showdebuglist); | |
437afbb8 | 26204 | |
cd4fb1b2 SM |
26205 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
26206 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
26207 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
26208 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
26209 | the demangler."), | |
26210 | NULL, show_check_physname, | |
26211 | &setdebuglist, &showdebuglist); | |
900e11f9 | 26212 | |
e615022a DE |
26213 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
26214 | no_class, &use_deprecated_index_sections, _("\ | |
26215 | Set whether to use deprecated gdb_index sections."), _("\ | |
26216 | Show whether to use deprecated gdb_index sections."), _("\ | |
26217 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
26218 | Normally they are ignored either because of a missing feature or\n\ | |
26219 | performance issue.\n\ | |
26220 | Warning: This option must be enabled before gdb reads the file."), | |
26221 | NULL, | |
26222 | NULL, | |
26223 | &setlist, &showlist); | |
26224 | ||
f1e6e072 TT |
26225 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
26226 | &dwarf2_locexpr_funcs); | |
26227 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
26228 | &dwarf2_loclist_funcs); | |
26229 | ||
26230 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
26231 | &dwarf2_block_frame_base_locexpr_funcs); | |
26232 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
26233 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
26234 | |
26235 | #if GDB_SELF_TEST | |
26236 | selftests::register_test ("dw2_expand_symtabs_matching", | |
26237 | selftests::dw2_expand_symtabs_matching::run_test); | |
26238 | #endif | |
6502dd73 | 26239 | } |