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. |
c906108c SS |
4 | |
5 | Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology, | |
6 | Inc. with support from Florida State University (under contract | |
7 | with the Ada Joint Program Office), and Silicon Graphics, Inc. | |
8 | Initial contribution by Brent Benson, Harris Computer Systems, Inc., | |
9 | based on Fred Fish's (Cygnus Support) implementation of DWARF 1 | |
7ce59000 | 10 | support. |
c906108c | 11 | |
c5aa993b | 12 | This file is part of GDB. |
c906108c | 13 | |
c5aa993b JM |
14 | This program is free software; you can redistribute it and/or modify |
15 | it under the terms of the GNU General Public License as published by | |
a9762ec7 JB |
16 | the Free Software Foundation; either version 3 of the License, or |
17 | (at your option) any later version. | |
c906108c | 18 | |
a9762ec7 JB |
19 | This program is distributed in the hope that it will be useful, |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
c906108c | 23 | |
c5aa993b | 24 | You should have received a copy of the GNU General Public License |
a9762ec7 | 25 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 26 | |
21b2bd31 DE |
27 | /* FIXME: Various die-reading functions need to be more careful with |
28 | reading off the end of the section. | |
29 | E.g., load_partial_dies, read_partial_die. */ | |
30 | ||
c906108c | 31 | #include "defs.h" |
82ca8957 | 32 | #include "dwarf2/read.h" |
3054dd54 | 33 | #include "dwarf2/abbrev.h" |
162dce55 | 34 | #include "dwarf2/attribute.h" |
4057dfde | 35 | #include "dwarf2/comp-unit.h" |
82ca8957 TT |
36 | #include "dwarf2/index-cache.h" |
37 | #include "dwarf2/index-common.h" | |
f4382c45 | 38 | #include "dwarf2/leb.h" |
8fdd972c | 39 | #include "dwarf2/line-header.h" |
9fda78b6 | 40 | #include "dwarf2/dwz.h" |
c90ec28a | 41 | #include "dwarf2/macro.h" |
4de283e4 TT |
42 | #include "bfd.h" |
43 | #include "elf-bfd.h" | |
44 | #include "symtab.h" | |
45 | #include "gdbtypes.h" | |
46 | #include "objfiles.h" | |
d55e5aa6 | 47 | #include "dwarf2.h" |
4de283e4 TT |
48 | #include "buildsym.h" |
49 | #include "demangle.h" | |
50 | #include "gdb-demangle.h" | |
4de283e4 | 51 | #include "filenames.h" /* for DOSish file names */ |
4de283e4 TT |
52 | #include "language.h" |
53 | #include "complaints.h" | |
82ca8957 TT |
54 | #include "dwarf2/expr.h" |
55 | #include "dwarf2/loc.h" | |
4de283e4 TT |
56 | #include "cp-support.h" |
57 | #include "hashtab.h" | |
58 | #include "command.h" | |
d55e5aa6 | 59 | #include "gdbcmd.h" |
4de283e4 TT |
60 | #include "block.h" |
61 | #include "addrmap.h" | |
62 | #include "typeprint.h" | |
63 | #include "psympriv.h" | |
4de283e4 | 64 | #include "c-lang.h" |
d55e5aa6 | 65 | #include "go-lang.h" |
4de283e4 TT |
66 | #include "valprint.h" |
67 | #include "gdbcore.h" /* for gnutarget */ | |
68 | #include "gdb/gdb-index.h" | |
4de283e4 TT |
69 | #include "gdb_bfd.h" |
70 | #include "f-lang.h" | |
71 | #include "source.h" | |
4de283e4 | 72 | #include "build-id.h" |
d55e5aa6 | 73 | #include "namespace.h" |
268a13a5 TT |
74 | #include "gdbsupport/function-view.h" |
75 | #include "gdbsupport/gdb_optional.h" | |
76 | #include "gdbsupport/underlying.h" | |
268a13a5 | 77 | #include "gdbsupport/hash_enum.h" |
4de283e4 | 78 | #include "filename-seen-cache.h" |
b32b108a | 79 | #include "producer.h" |
4de283e4 | 80 | #include <fcntl.h> |
4de283e4 | 81 | #include <algorithm> |
4de283e4 | 82 | #include <unordered_map> |
268a13a5 | 83 | #include "gdbsupport/selftest.h" |
c9317f21 | 84 | #include "rust-lang.h" |
268a13a5 | 85 | #include "gdbsupport/pathstuff.h" |
edd45eb0 | 86 | #include "count-one-bits.h" |
0d79cdc4 | 87 | #include "debuginfod-support.h" |
437afbb8 | 88 | |
73be47f5 DE |
89 | /* When == 1, print basic high level tracing messages. |
90 | When > 1, be more verbose. | |
b4f54984 DE |
91 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
92 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 93 | |
d97bc12b | 94 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 95 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 96 | |
27e0867f | 97 | /* When non-zero, dump line number entries as they are read in. */ |
8fdd972c | 98 | unsigned int dwarf_line_debug = 0; |
27e0867f | 99 | |
491144b5 CB |
100 | /* When true, cross-check physname against demangler. */ |
101 | static bool check_physname = false; | |
900e11f9 | 102 | |
491144b5 CB |
103 | /* When true, do not reject deprecated .gdb_index sections. */ |
104 | static bool use_deprecated_index_sections = false; | |
481860b3 | 105 | |
5bfd760d | 106 | static const struct objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; |
6502dd73 | 107 | |
f1e6e072 TT |
108 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
109 | ||
110 | static int dwarf2_locexpr_index; | |
111 | static int dwarf2_loclist_index; | |
112 | static int dwarf2_locexpr_block_index; | |
113 | static int dwarf2_loclist_block_index; | |
114 | ||
3f563c84 PA |
115 | /* An index into a (C++) symbol name component in a symbol name as |
116 | recorded in the mapped_index's symbol table. For each C++ symbol | |
117 | in the symbol table, we record one entry for the start of each | |
118 | component in the symbol in a table of name components, and then | |
119 | sort the table, in order to be able to binary search symbol names, | |
120 | ignoring leading namespaces, both completion and regular look up. | |
121 | For example, for symbol "A::B::C", we'll have an entry that points | |
122 | to "A::B::C", another that points to "B::C", and another for "C". | |
123 | Note that function symbols in GDB index have no parameter | |
124 | information, just the function/method names. You can convert a | |
125 | name_component to a "const char *" using the | |
126 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
127 | ||
128 | struct name_component | |
129 | { | |
130 | /* Offset in the symbol name where the component starts. Stored as | |
131 | a (32-bit) offset instead of a pointer to save memory and improve | |
132 | locality on 64-bit architectures. */ | |
133 | offset_type name_offset; | |
134 | ||
135 | /* The symbol's index in the symbol and constant pool tables of a | |
136 | mapped_index. */ | |
137 | offset_type idx; | |
138 | }; | |
139 | ||
44ed8f3e PA |
140 | /* Base class containing bits shared by both .gdb_index and |
141 | .debug_name indexes. */ | |
142 | ||
143 | struct mapped_index_base | |
144 | { | |
22ca247e TT |
145 | mapped_index_base () = default; |
146 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
147 | ||
44ed8f3e PA |
148 | /* The name_component table (a sorted vector). See name_component's |
149 | description above. */ | |
150 | std::vector<name_component> name_components; | |
151 | ||
152 | /* How NAME_COMPONENTS is sorted. */ | |
153 | enum case_sensitivity name_components_casing; | |
154 | ||
155 | /* Return the number of names in the symbol table. */ | |
156 | virtual size_t symbol_name_count () const = 0; | |
157 | ||
158 | /* Get the name of the symbol at IDX in the symbol table. */ | |
159 | virtual const char *symbol_name_at (offset_type idx) const = 0; | |
160 | ||
161 | /* Return whether the name at IDX in the symbol table should be | |
162 | ignored. */ | |
163 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
164 | { | |
165 | return false; | |
166 | } | |
167 | ||
168 | /* Build the symbol name component sorted vector, if we haven't | |
169 | yet. */ | |
170 | void build_name_components (); | |
171 | ||
172 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
173 | possible matches for LN_NO_PARAMS in the name component | |
174 | vector. */ | |
175 | std::pair<std::vector<name_component>::const_iterator, | |
176 | std::vector<name_component>::const_iterator> | |
3b00ef10 TT |
177 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
178 | enum language lang) const; | |
44ed8f3e PA |
179 | |
180 | /* Prevent deleting/destroying via a base class pointer. */ | |
181 | protected: | |
182 | ~mapped_index_base() = default; | |
183 | }; | |
184 | ||
9291a0cd TT |
185 | /* A description of the mapped index. The file format is described in |
186 | a comment by the code that writes the index. */ | |
fc898b42 | 187 | struct mapped_index final : public mapped_index_base |
9291a0cd | 188 | { |
f00a2de2 PA |
189 | /* A slot/bucket in the symbol table hash. */ |
190 | struct symbol_table_slot | |
191 | { | |
192 | const offset_type name; | |
193 | const offset_type vec; | |
194 | }; | |
195 | ||
559a7a62 | 196 | /* Index data format version. */ |
3063847f | 197 | int version = 0; |
559a7a62 | 198 | |
f00a2de2 PA |
199 | /* The address table data. */ |
200 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 201 | |
3876f04e | 202 | /* The symbol table, implemented as a hash table. */ |
f00a2de2 | 203 | gdb::array_view<symbol_table_slot> symbol_table; |
b11b1f88 | 204 | |
9291a0cd | 205 | /* A pointer to the constant pool. */ |
3063847f | 206 | const char *constant_pool = nullptr; |
3f563c84 | 207 | |
44ed8f3e PA |
208 | bool symbol_name_slot_invalid (offset_type idx) const override |
209 | { | |
210 | const auto &bucket = this->symbol_table[idx]; | |
9ab08412 | 211 | return bucket.name == 0 && bucket.vec == 0; |
44ed8f3e | 212 | } |
5c58de74 | 213 | |
3f563c84 PA |
214 | /* Convenience method to get at the name of the symbol at IDX in the |
215 | symbol table. */ | |
44ed8f3e | 216 | const char *symbol_name_at (offset_type idx) const override |
f00a2de2 | 217 | { return this->constant_pool + MAYBE_SWAP (this->symbol_table[idx].name); } |
5c58de74 | 218 | |
44ed8f3e PA |
219 | size_t symbol_name_count () const override |
220 | { return this->symbol_table.size (); } | |
9291a0cd TT |
221 | }; |
222 | ||
927aa2e7 JK |
223 | /* A description of the mapped .debug_names. |
224 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 225 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 | 226 | { |
ed2dc618 SM |
227 | mapped_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile_) |
228 | : dwarf2_per_objfile (dwarf2_per_objfile_) | |
229 | {} | |
230 | ||
231 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
927aa2e7 JK |
232 | bfd_endian dwarf5_byte_order; |
233 | bool dwarf5_is_dwarf64; | |
234 | bool augmentation_is_gdb; | |
235 | uint8_t offset_size; | |
236 | uint32_t cu_count = 0; | |
237 | uint32_t tu_count, bucket_count, name_count; | |
238 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
239 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
240 | const gdb_byte *name_table_string_offs_reordered; | |
241 | const gdb_byte *name_table_entry_offs_reordered; | |
242 | const gdb_byte *entry_pool; | |
243 | ||
244 | struct index_val | |
245 | { | |
246 | ULONGEST dwarf_tag; | |
247 | struct attr | |
248 | { | |
249 | /* Attribute name DW_IDX_*. */ | |
250 | ULONGEST dw_idx; | |
251 | ||
252 | /* Attribute form DW_FORM_*. */ | |
253 | ULONGEST form; | |
254 | ||
255 | /* Value if FORM is DW_FORM_implicit_const. */ | |
256 | LONGEST implicit_const; | |
257 | }; | |
258 | std::vector<attr> attr_vec; | |
259 | }; | |
260 | ||
261 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
262 | ||
263 | const char *namei_to_name (uint32_t namei) const; | |
44ed8f3e PA |
264 | |
265 | /* Implementation of the mapped_index_base virtual interface, for | |
266 | the name_components cache. */ | |
267 | ||
268 | const char *symbol_name_at (offset_type idx) const override | |
269 | { return namei_to_name (idx); } | |
270 | ||
271 | size_t symbol_name_count () const override | |
272 | { return this->name_count; } | |
927aa2e7 JK |
273 | }; |
274 | ||
cd4fb1b2 | 275 | /* See dwarf2read.h. */ |
ed2dc618 | 276 | |
cd4fb1b2 | 277 | dwarf2_per_objfile * |
ed2dc618 SM |
278 | get_dwarf2_per_objfile (struct objfile *objfile) |
279 | { | |
5bfd760d | 280 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 281 | } |
c906108c | 282 | |
251d32d9 | 283 | /* Default names of the debugging sections. */ |
c906108c | 284 | |
233a11ab CS |
285 | /* Note that if the debugging section has been compressed, it might |
286 | have a name like .zdebug_info. */ | |
287 | ||
9cdd5dbd DE |
288 | static const struct dwarf2_debug_sections dwarf2_elf_names = |
289 | { | |
251d32d9 TG |
290 | { ".debug_info", ".zdebug_info" }, |
291 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
292 | { ".debug_line", ".zdebug_line" }, | |
293 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 294 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 295 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 296 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 297 | { ".debug_str", ".zdebug_str" }, |
18a8505e | 298 | { ".debug_str_offsets", ".zdebug_str_offsets" }, |
43988095 | 299 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 300 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 301 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 302 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 303 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
304 | { ".debug_frame", ".zdebug_frame" }, |
305 | { ".eh_frame", NULL }, | |
24d3216f | 306 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
307 | { ".debug_names", ".zdebug_names" }, |
308 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 309 | 23 |
251d32d9 | 310 | }; |
c906108c | 311 | |
80626a55 | 312 | /* List of DWO/DWP sections. */ |
3019eac3 | 313 | |
80626a55 | 314 | static const struct dwop_section_names |
3019eac3 DE |
315 | { |
316 | struct dwarf2_section_names abbrev_dwo; | |
317 | struct dwarf2_section_names info_dwo; | |
318 | struct dwarf2_section_names line_dwo; | |
319 | struct dwarf2_section_names loc_dwo; | |
43988095 | 320 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
321 | struct dwarf2_section_names macinfo_dwo; |
322 | struct dwarf2_section_names macro_dwo; | |
3019eac3 DE |
323 | struct dwarf2_section_names str_dwo; |
324 | struct dwarf2_section_names str_offsets_dwo; | |
325 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
326 | struct dwarf2_section_names cu_index; |
327 | struct dwarf2_section_names tu_index; | |
3019eac3 | 328 | } |
80626a55 | 329 | dwop_section_names = |
3019eac3 DE |
330 | { |
331 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
332 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
333 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
334 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 335 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
336 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
337 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
3019eac3 DE |
338 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
339 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
340 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
341 | { ".debug_cu_index", ".zdebug_cu_index" }, |
342 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
343 | }; |
344 | ||
c906108c SS |
345 | /* local data types */ |
346 | ||
3da10d80 KS |
347 | /* Type used for delaying computation of method physnames. |
348 | See comments for compute_delayed_physnames. */ | |
349 | struct delayed_method_info | |
350 | { | |
351 | /* The type to which the method is attached, i.e., its parent class. */ | |
352 | struct type *type; | |
353 | ||
354 | /* The index of the method in the type's function fieldlists. */ | |
355 | int fnfield_index; | |
356 | ||
357 | /* The index of the method in the fieldlist. */ | |
358 | int index; | |
359 | ||
360 | /* The name of the DIE. */ | |
361 | const char *name; | |
362 | ||
363 | /* The DIE associated with this method. */ | |
364 | struct die_info *die; | |
365 | }; | |
366 | ||
e7c27a73 DJ |
367 | /* Internal state when decoding a particular compilation unit. */ |
368 | struct dwarf2_cu | |
369 | { | |
fcd3b13d SM |
370 | explicit dwarf2_cu (struct dwarf2_per_cu_data *per_cu); |
371 | ~dwarf2_cu (); | |
372 | ||
373 | DISABLE_COPY_AND_ASSIGN (dwarf2_cu); | |
374 | ||
c24bdb02 KS |
375 | /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope. |
376 | Create the set of symtabs used by this TU, or if this TU is sharing | |
377 | symtabs with another TU and the symtabs have already been created | |
378 | then restore those symtabs in the line header. | |
379 | We don't need the pc/line-number mapping for type units. */ | |
380 | void setup_type_unit_groups (struct die_info *die); | |
381 | ||
382 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the | |
383 | buildsym_compunit constructor. */ | |
384 | struct compunit_symtab *start_symtab (const char *name, | |
385 | const char *comp_dir, | |
386 | CORE_ADDR low_pc); | |
387 | ||
388 | /* Reset the builder. */ | |
389 | void reset_builder () { m_builder.reset (); } | |
390 | ||
d00adf39 | 391 | /* The header of the compilation unit. */ |
fcd3b13d | 392 | struct comp_unit_head header {}; |
e142c38c | 393 | |
d00adf39 | 394 | /* Base address of this compilation unit. */ |
fcd3b13d | 395 | CORE_ADDR base_address = 0; |
d00adf39 DE |
396 | |
397 | /* Non-zero if base_address has been set. */ | |
fcd3b13d | 398 | int base_known = 0; |
d00adf39 | 399 | |
e142c38c | 400 | /* The language we are debugging. */ |
fcd3b13d SM |
401 | enum language language = language_unknown; |
402 | const struct language_defn *language_defn = nullptr; | |
e142c38c | 403 | |
fcd3b13d | 404 | const char *producer = nullptr; |
b0f35d58 | 405 | |
c24bdb02 | 406 | private: |
804d2729 TT |
407 | /* The symtab builder for this CU. This is only non-NULL when full |
408 | symbols are being read. */ | |
c24bdb02 | 409 | std::unique_ptr<buildsym_compunit> m_builder; |
804d2729 | 410 | |
c24bdb02 | 411 | public: |
e142c38c DJ |
412 | /* The generic symbol table building routines have separate lists for |
413 | file scope symbols and all all other scopes (local scopes). So | |
414 | we need to select the right one to pass to add_symbol_to_list(). | |
415 | We do it by keeping a pointer to the correct list in list_in_scope. | |
416 | ||
417 | FIXME: The original dwarf code just treated the file scope as the | |
418 | first local scope, and all other local scopes as nested local | |
419 | scopes, and worked fine. Check to see if we really need to | |
420 | distinguish these in buildsym.c. */ | |
fcd3b13d | 421 | struct pending **list_in_scope = nullptr; |
e142c38c | 422 | |
b64f50a1 JK |
423 | /* Hash table holding all the loaded partial DIEs |
424 | with partial_die->offset.SECT_OFF as hash. */ | |
fcd3b13d | 425 | htab_t partial_dies = nullptr; |
72bf9492 DJ |
426 | |
427 | /* Storage for things with the same lifetime as this read-in compilation | |
428 | unit, including partial DIEs. */ | |
fcd3b13d | 429 | auto_obstack comp_unit_obstack; |
72bf9492 | 430 | |
ae038cb0 DJ |
431 | /* When multiple dwarf2_cu structures are living in memory, this field |
432 | chains them all together, so that they can be released efficiently. | |
433 | We will probably also want a generation counter so that most-recently-used | |
434 | compilation units are cached... */ | |
fcd3b13d | 435 | struct dwarf2_per_cu_data *read_in_chain = nullptr; |
ae038cb0 | 436 | |
69d751e3 | 437 | /* Backlink to our per_cu entry. */ |
ae038cb0 DJ |
438 | struct dwarf2_per_cu_data *per_cu; |
439 | ||
440 | /* How many compilation units ago was this CU last referenced? */ | |
fcd3b13d | 441 | int last_used = 0; |
ae038cb0 | 442 | |
b64f50a1 JK |
443 | /* A hash table of DIE cu_offset for following references with |
444 | die_info->offset.sect_off as hash. */ | |
fcd3b13d | 445 | htab_t die_hash = nullptr; |
10b3939b DJ |
446 | |
447 | /* Full DIEs if read in. */ | |
fcd3b13d | 448 | struct die_info *dies = nullptr; |
10b3939b DJ |
449 | |
450 | /* A set of pointers to dwarf2_per_cu_data objects for compilation | |
451 | units referenced by this one. Only set during full symbol processing; | |
452 | partial symbol tables do not have dependencies. */ | |
fcd3b13d | 453 | htab_t dependencies = nullptr; |
10b3939b | 454 | |
cb1df416 | 455 | /* Header data from the line table, during full symbol processing. */ |
fcd3b13d | 456 | struct line_header *line_header = nullptr; |
4c8aa72d PA |
457 | /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise, |
458 | it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL, | |
459 | this is the DW_TAG_compile_unit die for this CU. We'll hold on | |
460 | to the line header as long as this DIE is being processed. See | |
461 | process_die_scope. */ | |
fcd3b13d | 462 | die_info *line_header_die_owner = nullptr; |
cb1df416 | 463 | |
3da10d80 KS |
464 | /* A list of methods which need to have physnames computed |
465 | after all type information has been read. */ | |
c89b44cd | 466 | std::vector<delayed_method_info> method_list; |
3da10d80 | 467 | |
96408a79 | 468 | /* To be copied to symtab->call_site_htab. */ |
fcd3b13d | 469 | htab_t call_site_htab = nullptr; |
96408a79 | 470 | |
034e5797 DE |
471 | /* Non-NULL if this CU came from a DWO file. |
472 | There is an invariant here that is important to remember: | |
473 | Except for attributes copied from the top level DIE in the "main" | |
474 | (or "stub") file in preparation for reading the DWO file | |
18a8505e | 475 | (e.g., DW_AT_addr_base), we KISS: there is only *one* CU. |
034e5797 DE |
476 | Either there isn't a DWO file (in which case this is NULL and the point |
477 | is moot), or there is and either we're not going to read it (in which | |
478 | case this is NULL) or there is and we are reading it (in which case this | |
479 | is non-NULL). */ | |
fcd3b13d | 480 | struct dwo_unit *dwo_unit = nullptr; |
3019eac3 | 481 | |
18a8505e | 482 | /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present. |
1dbab08b | 483 | Note this value comes from the Fission stub CU/TU's DIE. */ |
18a8505e | 484 | gdb::optional<ULONGEST> addr_base; |
3019eac3 | 485 | |
18a8505e | 486 | /* The DW_AT_rnglists_base attribute if present. |
1dbab08b | 487 | Note this value comes from the Fission stub CU/TU's DIE. |
2e3cf129 | 488 | Also note that the value is zero in the non-DWO case so this value can |
ab435259 DE |
489 | be used without needing to know whether DWO files are in use or not. |
490 | N.B. This does not apply to DW_AT_ranges appearing in | |
491 | DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever | |
492 | DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then | |
18a8505e | 493 | DW_AT_rnglists_base *would* have to be applied, and we'd have to care |
ab435259 | 494 | whether the DW_AT_ranges attribute came from the skeleton or DWO. */ |
fcd3b13d | 495 | ULONGEST ranges_base = 0; |
2e3cf129 | 496 | |
c9317f21 TT |
497 | /* When reading debug info generated by older versions of rustc, we |
498 | have to rewrite some union types to be struct types with a | |
499 | variant part. This rewriting must be done after the CU is fully | |
500 | read in, because otherwise at the point of rewriting some struct | |
501 | type might not have been fully processed. So, we keep a list of | |
502 | all such types here and process them after expansion. */ | |
503 | std::vector<struct type *> rust_unions; | |
504 | ||
18a8505e AT |
505 | /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO |
506 | files, the value is implicitly zero. For DWARF 5 version DWO files, the | |
507 | value is often implicit and is the size of the header of | |
508 | .debug_str_offsets section (8 or 4, depending on the address size). */ | |
509 | gdb::optional<ULONGEST> str_offsets_base; | |
510 | ||
ae038cb0 | 511 | /* Mark used when releasing cached dies. */ |
9068261f | 512 | bool mark : 1; |
ae038cb0 | 513 | |
8be455d7 JK |
514 | /* This CU references .debug_loc. See the symtab->locations_valid field. |
515 | This test is imperfect as there may exist optimized debug code not using | |
516 | any location list and still facing inlining issues if handled as | |
517 | unoptimized code. For a future better test see GCC PR other/32998. */ | |
9068261f | 518 | bool has_loclist : 1; |
ba919b58 | 519 | |
9068261f | 520 | /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true |
1b80a9fa JK |
521 | if all the producer_is_* fields are valid. This information is cached |
522 | because profiling CU expansion showed excessive time spent in | |
523 | producer_is_gxx_lt_4_6. */ | |
9068261f AB |
524 | bool checked_producer : 1; |
525 | bool producer_is_gxx_lt_4_6 : 1; | |
526 | bool producer_is_gcc_lt_4_3 : 1; | |
eb77c9df | 527 | bool producer_is_icc : 1; |
9068261f | 528 | bool producer_is_icc_lt_14 : 1; |
c258c396 | 529 | bool producer_is_codewarrior : 1; |
4d4ec4e5 | 530 | |
9068261f | 531 | /* When true, the file that we're processing is known to have |
4d4ec4e5 TT |
532 | debugging info for C++ namespaces. GCC 3.3.x did not produce |
533 | this information, but later versions do. */ | |
534 | ||
9068261f | 535 | bool processing_has_namespace_info : 1; |
d590ff25 YQ |
536 | |
537 | struct partial_die_info *find_partial_die (sect_offset sect_off); | |
c24bdb02 KS |
538 | |
539 | /* If this CU was inherited by another CU (via specification, | |
540 | abstract_origin, etc), this is the ancestor CU. */ | |
541 | dwarf2_cu *ancestor; | |
542 | ||
543 | /* Get the buildsym_compunit for this CU. */ | |
544 | buildsym_compunit *get_builder () | |
545 | { | |
546 | /* If this CU has a builder associated with it, use that. */ | |
547 | if (m_builder != nullptr) | |
548 | return m_builder.get (); | |
549 | ||
550 | /* Otherwise, search ancestors for a valid builder. */ | |
551 | if (ancestor != nullptr) | |
552 | return ancestor->get_builder (); | |
553 | ||
554 | return nullptr; | |
555 | } | |
e7c27a73 DJ |
556 | }; |
557 | ||
094b34ac DE |
558 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
559 | This includes type_unit_group and quick_file_names. */ | |
560 | ||
561 | struct stmt_list_hash | |
562 | { | |
563 | /* The DWO unit this table is from or NULL if there is none. */ | |
564 | struct dwo_unit *dwo_unit; | |
565 | ||
566 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 567 | sect_offset line_sect_off; |
094b34ac DE |
568 | }; |
569 | ||
f4dc4d17 DE |
570 | /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to |
571 | an object of this type. */ | |
572 | ||
573 | struct type_unit_group | |
574 | { | |
0186c6a7 | 575 | /* dwarf2read.c's main "handle" on a TU symtab. |
f4dc4d17 DE |
576 | To simplify things we create an artificial CU that "includes" all the |
577 | type units using this stmt_list so that the rest of the code still has | |
197400e8 | 578 | a "per_cu" handle on the symtab. */ |
094b34ac DE |
579 | struct dwarf2_per_cu_data per_cu; |
580 | ||
0186c6a7 DE |
581 | /* The TUs that share this DW_AT_stmt_list entry. |
582 | This is added to while parsing type units to build partial symtabs, | |
583 | and is deleted afterwards and not used again. */ | |
a8b3b8e9 | 584 | std::vector<signatured_type *> *tus; |
f4dc4d17 | 585 | |
43f3e411 | 586 | /* The compunit symtab. |
094b34ac | 587 | Type units in a group needn't all be defined in the same source file, |
43f3e411 DE |
588 | so we create an essentially anonymous symtab as the compunit symtab. */ |
589 | struct compunit_symtab *compunit_symtab; | |
f4dc4d17 | 590 | |
094b34ac DE |
591 | /* The data used to construct the hash key. */ |
592 | struct stmt_list_hash hash; | |
f4dc4d17 | 593 | |
f4dc4d17 DE |
594 | /* The symbol tables for this TU (obtained from the files listed in |
595 | DW_AT_stmt_list). | |
596 | WARNING: The order of entries here must match the order of entries | |
597 | in the line header. After the first TU using this type_unit_group, the | |
598 | line header for the subsequent TUs is recreated from this. This is done | |
599 | because we need to use the same symtabs for each TU using the same | |
600 | DW_AT_stmt_list value. Also note that symtabs may be repeated here, | |
601 | there's no guarantee the line header doesn't have duplicate entries. */ | |
602 | struct symtab **symtabs; | |
603 | }; | |
604 | ||
73869dc2 | 605 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
606 | |
607 | struct dwo_sections | |
608 | { | |
609 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
610 | struct dwarf2_section_info line; |
611 | struct dwarf2_section_info loc; | |
43988095 | 612 | struct dwarf2_section_info loclists; |
09262596 DE |
613 | struct dwarf2_section_info macinfo; |
614 | struct dwarf2_section_info macro; | |
3019eac3 DE |
615 | struct dwarf2_section_info str; |
616 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
617 | /* In the case of a virtual DWO file, these two are unused. */ |
618 | struct dwarf2_section_info info; | |
fd5866f6 | 619 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
620 | }; |
621 | ||
c88ee1f0 | 622 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
623 | |
624 | struct dwo_unit | |
625 | { | |
626 | /* Backlink to the containing struct dwo_file. */ | |
627 | struct dwo_file *dwo_file; | |
628 | ||
629 | /* The "id" that distinguishes this CU/TU. | |
630 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
631 | Since signatures came first, we stick with it for consistency. */ | |
632 | ULONGEST signature; | |
633 | ||
634 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 635 | struct dwarf2_section_info *section; |
3019eac3 | 636 | |
9c541725 PA |
637 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
638 | sect_offset sect_off; | |
3019eac3 DE |
639 | unsigned int length; |
640 | ||
641 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
642 | cu_offset type_offset_in_tu; | |
643 | }; | |
644 | ||
73869dc2 DE |
645 | /* include/dwarf2.h defines the DWP section codes. |
646 | It defines a max value but it doesn't define a min value, which we | |
647 | use for error checking, so provide one. */ | |
648 | ||
649 | enum dwp_v2_section_ids | |
650 | { | |
651 | DW_SECT_MIN = 1 | |
652 | }; | |
653 | ||
80626a55 | 654 | /* Data for one DWO file. |
57d63ce2 DE |
655 | |
656 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
657 | appears in a DWP file). DWP files don't really have DWO files per se - | |
658 | comdat folding of types "loses" the DWO file they came from, and from | |
659 | a high level view DWP files appear to contain a mass of random types. | |
660 | However, to maintain consistency with the non-DWP case we pretend DWP | |
661 | files contain virtual DWO files, and we assign each TU with one virtual | |
662 | DWO file (generally based on the line and abbrev section offsets - | |
663 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
664 | |
665 | struct dwo_file | |
666 | { | |
51ac9db5 SM |
667 | dwo_file () = default; |
668 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
669 | ||
18a8505e | 670 | /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. |
80626a55 DE |
671 | For virtual DWO files the name is constructed from the section offsets |
672 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
673 | from related CU+TUs. */ | |
51ac9db5 | 674 | const char *dwo_name = nullptr; |
0ac5b59e DE |
675 | |
676 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 677 | const char *comp_dir = nullptr; |
3019eac3 | 678 | |
80626a55 DE |
679 | /* The bfd, when the file is open. Otherwise this is NULL. |
680 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 681 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 682 | |
73869dc2 DE |
683 | /* The sections that make up this DWO file. |
684 | Remember that for virtual DWO files in DWP V2, these are virtual | |
685 | sections (for lack of a better name). */ | |
51ac9db5 | 686 | struct dwo_sections sections {}; |
3019eac3 | 687 | |
33c5cd75 DB |
688 | /* The CUs in the file. |
689 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
690 | an extension to handle LLVM's Link Time Optimization output (where | |
691 | multiple source files may be compiled into a single object/dwo pair). */ | |
b0b6a987 | 692 | htab_up cus; |
3019eac3 DE |
693 | |
694 | /* Table of TUs in the file. | |
695 | Each element is a struct dwo_unit. */ | |
b0b6a987 | 696 | htab_up tus; |
3019eac3 DE |
697 | }; |
698 | ||
80626a55 DE |
699 | /* These sections are what may appear in a DWP file. */ |
700 | ||
701 | struct dwp_sections | |
702 | { | |
73869dc2 | 703 | /* These are used by both DWP version 1 and 2. */ |
80626a55 DE |
704 | struct dwarf2_section_info str; |
705 | struct dwarf2_section_info cu_index; | |
706 | struct dwarf2_section_info tu_index; | |
73869dc2 DE |
707 | |
708 | /* These are only used by DWP version 2 files. | |
709 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other | |
710 | sections are referenced by section number, and are not recorded here. | |
711 | In DWP version 2 there is at most one copy of all these sections, each | |
712 | section being (effectively) comprised of the concatenation of all of the | |
713 | individual sections that exist in the version 1 format. | |
714 | To keep the code simple we treat each of these concatenated pieces as a | |
715 | section itself (a virtual section?). */ | |
716 | struct dwarf2_section_info abbrev; | |
717 | struct dwarf2_section_info info; | |
718 | struct dwarf2_section_info line; | |
719 | struct dwarf2_section_info loc; | |
720 | struct dwarf2_section_info macinfo; | |
721 | struct dwarf2_section_info macro; | |
722 | struct dwarf2_section_info str_offsets; | |
723 | struct dwarf2_section_info types; | |
80626a55 DE |
724 | }; |
725 | ||
73869dc2 DE |
726 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
727 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 728 | |
73869dc2 | 729 | struct virtual_v1_dwo_sections |
80626a55 DE |
730 | { |
731 | struct dwarf2_section_info abbrev; | |
732 | struct dwarf2_section_info line; | |
733 | struct dwarf2_section_info loc; | |
734 | struct dwarf2_section_info macinfo; | |
735 | struct dwarf2_section_info macro; | |
736 | struct dwarf2_section_info str_offsets; | |
737 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 738 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
739 | struct dwarf2_section_info info_or_types; |
740 | }; | |
741 | ||
73869dc2 DE |
742 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2. |
743 | In version 2, the sections of the DWO files are concatenated together | |
744 | and stored in one section of that name. Thus each ELF section contains | |
745 | several "virtual" sections. */ | |
746 | ||
747 | struct virtual_v2_dwo_sections | |
748 | { | |
749 | bfd_size_type abbrev_offset; | |
750 | bfd_size_type abbrev_size; | |
751 | ||
752 | bfd_size_type line_offset; | |
753 | bfd_size_type line_size; | |
754 | ||
755 | bfd_size_type loc_offset; | |
756 | bfd_size_type loc_size; | |
757 | ||
758 | bfd_size_type macinfo_offset; | |
759 | bfd_size_type macinfo_size; | |
760 | ||
761 | bfd_size_type macro_offset; | |
762 | bfd_size_type macro_size; | |
763 | ||
764 | bfd_size_type str_offsets_offset; | |
765 | bfd_size_type str_offsets_size; | |
766 | ||
767 | /* Each DWP hash table entry records one CU or one TU. | |
768 | That is recorded here, and copied to dwo_unit.section. */ | |
769 | bfd_size_type info_or_types_offset; | |
770 | bfd_size_type info_or_types_size; | |
771 | }; | |
772 | ||
80626a55 DE |
773 | /* Contents of DWP hash tables. */ |
774 | ||
775 | struct dwp_hash_table | |
776 | { | |
73869dc2 | 777 | uint32_t version, nr_columns; |
80626a55 | 778 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
779 | const gdb_byte *hash_table, *unit_table; |
780 | union | |
781 | { | |
782 | struct | |
783 | { | |
784 | const gdb_byte *indices; | |
785 | } v1; | |
786 | struct | |
787 | { | |
788 | /* This is indexed by column number and gives the id of the section | |
789 | in that column. */ | |
790 | #define MAX_NR_V2_DWO_SECTIONS \ | |
791 | (1 /* .debug_info or .debug_types */ \ | |
792 | + 1 /* .debug_abbrev */ \ | |
793 | + 1 /* .debug_line */ \ | |
794 | + 1 /* .debug_loc */ \ | |
795 | + 1 /* .debug_str_offsets */ \ | |
796 | + 1 /* .debug_macro or .debug_macinfo */) | |
797 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
798 | const gdb_byte *offsets; | |
799 | const gdb_byte *sizes; | |
800 | } v2; | |
801 | } section_pool; | |
80626a55 DE |
802 | }; |
803 | ||
804 | /* Data for one DWP file. */ | |
805 | ||
806 | struct dwp_file | |
807 | { | |
400174b1 TT |
808 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
809 | : name (name_), | |
810 | dbfd (std::move (abfd)) | |
811 | { | |
812 | } | |
813 | ||
80626a55 DE |
814 | /* Name of the file. */ |
815 | const char *name; | |
816 | ||
73869dc2 | 817 | /* File format version. */ |
400174b1 | 818 | int version = 0; |
73869dc2 | 819 | |
93417882 | 820 | /* The bfd. */ |
400174b1 | 821 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
822 | |
823 | /* Section info for this file. */ | |
400174b1 | 824 | struct dwp_sections sections {}; |
80626a55 | 825 | |
57d63ce2 | 826 | /* Table of CUs in the file. */ |
400174b1 | 827 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
828 | |
829 | /* Table of TUs in the file. */ | |
400174b1 | 830 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 831 | |
19ac8c2e | 832 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
48b490f2 TT |
833 | htab_up loaded_cus; |
834 | htab_up loaded_tus; | |
80626a55 | 835 | |
73869dc2 DE |
836 | /* Table to map ELF section numbers to their sections. |
837 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
838 | unsigned int num_sections = 0; |
839 | asection **elf_sections = nullptr; | |
80626a55 DE |
840 | }; |
841 | ||
0963b4bd MS |
842 | /* Struct used to pass misc. parameters to read_die_and_children, et |
843 | al. which are used for both .debug_info and .debug_types dies. | |
844 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 845 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
846 | |
847 | struct die_reader_specs | |
848 | { | |
a32a8923 | 849 | /* The bfd of die_section. */ |
93311388 DE |
850 | bfd* abfd; |
851 | ||
852 | /* The CU of the DIE we are parsing. */ | |
853 | struct dwarf2_cu *cu; | |
854 | ||
80626a55 | 855 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
856 | struct dwo_file *dwo_file; |
857 | ||
dee91e82 | 858 | /* The section the die comes from. |
3019eac3 | 859 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
860 | struct dwarf2_section_info *die_section; |
861 | ||
862 | /* die_section->buffer. */ | |
d521ce57 | 863 | const gdb_byte *buffer; |
f664829e DE |
864 | |
865 | /* The end of the buffer. */ | |
866 | const gdb_byte *buffer_end; | |
a2ce51a0 | 867 | |
685af9cd TT |
868 | /* The abbreviation table to use when reading the DIEs. */ |
869 | struct abbrev_table *abbrev_table; | |
93311388 DE |
870 | }; |
871 | ||
c0ab21c2 TT |
872 | /* A subclass of die_reader_specs that holds storage and has complex |
873 | constructor and destructor behavior. */ | |
874 | ||
875 | class cutu_reader : public die_reader_specs | |
876 | { | |
877 | public: | |
878 | ||
879 | cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
880 | struct abbrev_table *abbrev_table, | |
6751ebae | 881 | int use_existing_cu, |
c0ab21c2 TT |
882 | bool skip_partial); |
883 | ||
884 | explicit cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
885 | struct dwarf2_cu *parent_cu = nullptr, | |
886 | struct dwo_file *dwo_file = nullptr); | |
887 | ||
c0ab21c2 TT |
888 | DISABLE_COPY_AND_ASSIGN (cutu_reader); |
889 | ||
890 | const gdb_byte *info_ptr = nullptr; | |
891 | struct die_info *comp_unit_die = nullptr; | |
c0ab21c2 TT |
892 | bool dummy_p = false; |
893 | ||
6751ebae TT |
894 | /* Release the new CU, putting it on the chain. This cannot be done |
895 | for dummy CUs. */ | |
896 | void keep (); | |
897 | ||
c0ab21c2 TT |
898 | private: |
899 | void init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 900 | int use_existing_cu); |
c0ab21c2 TT |
901 | |
902 | struct dwarf2_per_cu_data *m_this_cu; | |
c0ab21c2 TT |
903 | std::unique_ptr<dwarf2_cu> m_new_cu; |
904 | ||
905 | /* The ordinary abbreviation table. */ | |
906 | abbrev_table_up m_abbrev_table_holder; | |
907 | ||
908 | /* The DWO abbreviation table. */ | |
909 | abbrev_table_up m_dwo_abbrev_table; | |
910 | }; | |
dee91e82 | 911 | |
c906108c | 912 | /* When we construct a partial symbol table entry we only |
0963b4bd | 913 | need this much information. */ |
6f06d47b | 914 | struct partial_die_info : public allocate_on_obstack |
c906108c | 915 | { |
6f06d47b YQ |
916 | partial_die_info (sect_offset sect_off, struct abbrev_info *abbrev); |
917 | ||
918 | /* Disable assign but still keep copy ctor, which is needed | |
919 | load_partial_dies. */ | |
920 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
921 | ||
52356b79 YQ |
922 | /* Adjust the partial die before generating a symbol for it. This |
923 | function may set the is_external flag or change the DIE's | |
924 | name. */ | |
925 | void fixup (struct dwarf2_cu *cu); | |
926 | ||
48fbe735 YQ |
927 | /* Read a minimal amount of information into the minimal die |
928 | structure. */ | |
929 | const gdb_byte *read (const struct die_reader_specs *reader, | |
930 | const struct abbrev_info &abbrev, | |
931 | const gdb_byte *info_ptr); | |
932 | ||
72bf9492 | 933 | /* Offset of this DIE. */ |
6f06d47b | 934 | const sect_offset sect_off; |
72bf9492 DJ |
935 | |
936 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 937 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 938 | |
72bf9492 | 939 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
940 | const unsigned int has_children : 1; |
941 | ||
72bf9492 DJ |
942 | unsigned int is_external : 1; |
943 | unsigned int is_declaration : 1; | |
944 | unsigned int has_type : 1; | |
945 | unsigned int has_specification : 1; | |
946 | unsigned int has_pc_info : 1; | |
481860b3 | 947 | unsigned int may_be_inlined : 1; |
72bf9492 | 948 | |
0c1b455e TT |
949 | /* This DIE has been marked DW_AT_main_subprogram. */ |
950 | unsigned int main_subprogram : 1; | |
951 | ||
72bf9492 DJ |
952 | /* Flag set if the SCOPE field of this structure has been |
953 | computed. */ | |
954 | unsigned int scope_set : 1; | |
955 | ||
fa4028e9 JB |
956 | /* Flag set if the DIE has a byte_size attribute. */ |
957 | unsigned int has_byte_size : 1; | |
958 | ||
ff908ebf AW |
959 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
960 | unsigned int has_const_value : 1; | |
961 | ||
98bfdba5 PA |
962 | /* Flag set if any of the DIE's children are template arguments. */ |
963 | unsigned int has_template_arguments : 1; | |
964 | ||
52356b79 | 965 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
966 | unsigned int fixup_called : 1; |
967 | ||
36586728 TT |
968 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
969 | unsigned int is_dwz : 1; | |
970 | ||
971 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
972 | unsigned int spec_is_dwz : 1; | |
973 | ||
72bf9492 | 974 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 975 | sometimes a default name for unnamed DIEs. */ |
6f06d47b | 976 | const char *name = nullptr; |
72bf9492 | 977 | |
abc72ce4 | 978 | /* The linkage name, if present. */ |
6f06d47b | 979 | const char *linkage_name = nullptr; |
abc72ce4 | 980 | |
72bf9492 DJ |
981 | /* The scope to prepend to our children. This is generally |
982 | allocated on the comp_unit_obstack, so will disappear | |
983 | when this compilation unit leaves the cache. */ | |
6f06d47b | 984 | const char *scope = nullptr; |
72bf9492 | 985 | |
95554aad TT |
986 | /* Some data associated with the partial DIE. The tag determines |
987 | which field is live. */ | |
988 | union | |
989 | { | |
990 | /* The location description associated with this DIE, if any. */ | |
991 | struct dwarf_block *locdesc; | |
992 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 993 | sect_offset sect_off; |
6f06d47b | 994 | } d {}; |
72bf9492 DJ |
995 | |
996 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
997 | CORE_ADDR lowpc = 0; |
998 | CORE_ADDR highpc = 0; | |
72bf9492 | 999 | |
93311388 | 1000 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 1001 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
1002 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
1003 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 1004 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
1005 | |
1006 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
1007 | DW_AT_specification (or DW_AT_abstract_origin or | |
1008 | DW_AT_extension). */ | |
6f06d47b | 1009 | sect_offset spec_offset {}; |
72bf9492 DJ |
1010 | |
1011 | /* Pointers to this DIE's parent, first child, and next sibling, | |
1012 | if any. */ | |
6f06d47b YQ |
1013 | struct partial_die_info *die_parent = nullptr; |
1014 | struct partial_die_info *die_child = nullptr; | |
1015 | struct partial_die_info *die_sibling = nullptr; | |
1016 | ||
1017 | friend struct partial_die_info * | |
1018 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
1019 | ||
1020 | private: | |
1021 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
1022 | partial_die_info (sect_offset sect_off) | |
1023 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
1024 | { | |
1025 | } | |
1026 | ||
1027 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
1028 | int has_children_) | |
1029 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
1030 | { | |
1031 | is_external = 0; | |
1032 | is_declaration = 0; | |
1033 | has_type = 0; | |
1034 | has_specification = 0; | |
1035 | has_pc_info = 0; | |
1036 | may_be_inlined = 0; | |
1037 | main_subprogram = 0; | |
1038 | scope_set = 0; | |
1039 | has_byte_size = 0; | |
1040 | has_const_value = 0; | |
1041 | has_template_arguments = 0; | |
1042 | fixup_called = 0; | |
1043 | is_dwz = 0; | |
1044 | spec_is_dwz = 0; | |
1045 | } | |
c906108c SS |
1046 | }; |
1047 | ||
0963b4bd | 1048 | /* This data structure holds a complete die structure. */ |
c906108c SS |
1049 | struct die_info |
1050 | { | |
76815b17 DE |
1051 | /* DWARF-2 tag for this DIE. */ |
1052 | ENUM_BITFIELD(dwarf_tag) tag : 16; | |
1053 | ||
1054 | /* Number of attributes */ | |
98bfdba5 PA |
1055 | unsigned char num_attrs; |
1056 | ||
1057 | /* True if we're presently building the full type name for the | |
1058 | type derived from this DIE. */ | |
1059 | unsigned char building_fullname : 1; | |
76815b17 | 1060 | |
adde2bff DE |
1061 | /* True if this die is in process. PR 16581. */ |
1062 | unsigned char in_process : 1; | |
1063 | ||
3e225074 TT |
1064 | /* True if this DIE has children. */ |
1065 | unsigned char has_children : 1; | |
1066 | ||
76815b17 DE |
1067 | /* Abbrev number */ |
1068 | unsigned int abbrev; | |
1069 | ||
93311388 | 1070 | /* Offset in .debug_info or .debug_types section. */ |
9c541725 | 1071 | sect_offset sect_off; |
78ba4af6 JB |
1072 | |
1073 | /* The dies in a compilation unit form an n-ary tree. PARENT | |
1074 | points to this die's parent; CHILD points to the first child of | |
1075 | this node; and all the children of a given node are chained | |
4950bc1c | 1076 | together via their SIBLING fields. */ |
639d11d3 DC |
1077 | struct die_info *child; /* Its first child, if any. */ |
1078 | struct die_info *sibling; /* Its next sibling, if any. */ | |
1079 | struct die_info *parent; /* Its parent, if any. */ | |
c906108c | 1080 | |
b60c80d6 DJ |
1081 | /* An array of attributes, with NUM_ATTRS elements. There may be |
1082 | zero, but it's not common and zero-sized arrays are not | |
1083 | sufficiently portable C. */ | |
1084 | struct attribute attrs[1]; | |
c906108c SS |
1085 | }; |
1086 | ||
c906108c SS |
1087 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
1088 | but this would require a corresponding change in unpack_field_as_long | |
1089 | and friends. */ | |
1090 | static int bits_per_byte = 8; | |
1091 | ||
2ddeaf8a TT |
1092 | /* When reading a variant or variant part, we track a bit more |
1093 | information about the field, and store it in an object of this | |
1094 | type. */ | |
1095 | ||
1096 | struct variant_field | |
1097 | { | |
1098 | /* If we see a DW_TAG_variant, then this will be the discriminant | |
1099 | value. */ | |
1100 | ULONGEST discriminant_value; | |
1101 | /* If we see a DW_TAG_variant, then this will be set if this is the | |
1102 | default branch. */ | |
1103 | bool default_branch; | |
1104 | /* While reading a DW_TAG_variant_part, this will be set if this | |
1105 | field is the discriminant. */ | |
1106 | bool is_discriminant; | |
1107 | }; | |
1108 | ||
52059ffd TT |
1109 | struct nextfield |
1110 | { | |
be2daae6 TT |
1111 | int accessibility = 0; |
1112 | int virtuality = 0; | |
2ddeaf8a | 1113 | /* Extra information to describe a variant or variant part. */ |
be2daae6 TT |
1114 | struct variant_field variant {}; |
1115 | struct field field {}; | |
52059ffd TT |
1116 | }; |
1117 | ||
1118 | struct fnfieldlist | |
1119 | { | |
be2daae6 TT |
1120 | const char *name = nullptr; |
1121 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1122 | }; |
1123 | ||
c906108c SS |
1124 | /* The routines that read and process dies for a C struct or C++ class |
1125 | pass lists of data member fields and lists of member function fields | |
1126 | in an instance of a field_info structure, as defined below. */ | |
1127 | struct field_info | |
c5aa993b | 1128 | { |
0963b4bd | 1129 | /* List of data member and baseclasses fields. */ |
be2daae6 TT |
1130 | std::vector<struct nextfield> fields; |
1131 | std::vector<struct nextfield> baseclasses; | |
c906108c | 1132 | |
85102364 | 1133 | /* Set if the accessibility of one of the fields is not public. */ |
be2daae6 | 1134 | int non_public_fields = 0; |
c906108c | 1135 | |
c5aa993b JM |
1136 | /* Member function fieldlist array, contains name of possibly overloaded |
1137 | member function, number of overloaded member functions and a pointer | |
1138 | to the head of the member function field chain. */ | |
be2daae6 | 1139 | std::vector<struct fnfieldlist> fnfieldlists; |
98751a41 JK |
1140 | |
1141 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1142 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
be2daae6 | 1143 | std::vector<struct decl_field> typedef_field_list; |
883fd55a KS |
1144 | |
1145 | /* Nested types defined by this class and the number of elements in this | |
1146 | list. */ | |
be2daae6 | 1147 | std::vector<struct decl_field> nested_types_list; |
317f7127 TT |
1148 | |
1149 | /* Return the total number of fields (including baseclasses). */ | |
1150 | int nfields () const | |
1151 | { | |
1152 | return fields.size () + baseclasses.size (); | |
1153 | } | |
c5aa993b | 1154 | }; |
c906108c | 1155 | |
ae038cb0 DJ |
1156 | /* Loaded secondary compilation units are kept in memory until they |
1157 | have not been referenced for the processing of this many | |
1158 | compilation units. Set this to zero to disable caching. Cache | |
1159 | sizes of up to at least twenty will improve startup time for | |
1160 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1161 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1162 | static void |
b4f54984 DE |
1163 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1164 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1165 | { |
3e43a32a | 1166 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1167 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1168 | value); |
1169 | } | |
4390d890 | 1170 | \f |
c906108c SS |
1171 | /* local function prototypes */ |
1172 | ||
918dd910 JK |
1173 | static void dwarf2_find_base_address (struct die_info *die, |
1174 | struct dwarf2_cu *cu); | |
1175 | ||
891813be | 1176 | static dwarf2_psymtab *create_partial_symtab |
0018ea6f DE |
1177 | (struct dwarf2_per_cu_data *per_cu, const char *name); |
1178 | ||
f1902523 JK |
1179 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1180 | const gdb_byte *info_ptr, | |
3e225074 | 1181 | struct die_info *type_unit_die); |
f1902523 | 1182 | |
ed2dc618 SM |
1183 | static void dwarf2_build_psymtabs_hard |
1184 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
c906108c | 1185 | |
72bf9492 DJ |
1186 | static void scan_partial_symbols (struct partial_die_info *, |
1187 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1188 | int, struct dwarf2_cu *); |
c906108c | 1189 | |
72bf9492 DJ |
1190 | static void add_partial_symbol (struct partial_die_info *, |
1191 | struct dwarf2_cu *); | |
63d06c5c | 1192 | |
72bf9492 DJ |
1193 | static void add_partial_namespace (struct partial_die_info *pdi, |
1194 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1195 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1196 | |
5d7cb8df | 1197 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1198 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1199 | struct dwarf2_cu *cu); |
1200 | ||
72bf9492 DJ |
1201 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1202 | struct dwarf2_cu *cu); | |
91c24f0a | 1203 | |
bc30ff58 JB |
1204 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1205 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1206 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1207 | |
d521ce57 | 1208 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1209 | |
dee91e82 | 1210 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1211 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1212 | |
fb816e8b TV |
1213 | /* A pair of partial_die_info and compilation unit. */ |
1214 | struct cu_partial_die_info | |
1215 | { | |
1216 | /* The compilation unit of the partial_die_info. */ | |
1217 | struct dwarf2_cu *cu; | |
1218 | /* A partial_die_info. */ | |
1219 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1220 | |
1221 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1222 | : cu (cu), | |
1223 | pdi (pdi) | |
405feb71 | 1224 | { /* Nothing. */ } |
122cf0f2 AB |
1225 | |
1226 | private: | |
1227 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1228 | }; |
1229 | ||
122cf0f2 AB |
1230 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1231 | struct dwarf2_cu *); | |
72bf9492 | 1232 | |
d521ce57 TT |
1233 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
1234 | struct attribute *, struct attr_abbrev *, | |
18a8505e AT |
1235 | const gdb_byte *, bool *need_reprocess); |
1236 | ||
1237 | static void read_attribute_reprocess (const struct die_reader_specs *reader, | |
1238 | struct attribute *attr); | |
1239 | ||
1240 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); | |
a8329558 | 1241 | |
c764a876 | 1242 | static LONGEST read_checked_initial_length_and_offset |
d521ce57 | 1243 | (bfd *, const gdb_byte *, const struct comp_unit_head *, |
c764a876 | 1244 | unsigned int *, unsigned int *); |
613e1657 | 1245 | |
ed2dc618 SM |
1246 | static sect_offset read_abbrev_offset |
1247 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
1248 | struct dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1249 | |
ed2dc618 SM |
1250 | static const char *read_indirect_string |
1251 | (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *, const gdb_byte *, | |
1252 | const struct comp_unit_head *, unsigned int *); | |
4bdf3d34 | 1253 | |
ed2dc618 | 1254 | static const char *read_indirect_string_at_offset |
4f44ae6c | 1255 | (struct dwarf2_per_objfile *dwarf2_per_objfile, LONGEST str_offset); |
927aa2e7 | 1256 | |
d521ce57 TT |
1257 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1258 | const gdb_byte *, | |
3019eac3 DE |
1259 | unsigned int *); |
1260 | ||
18a8505e AT |
1261 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
1262 | ULONGEST str_index); | |
1263 | ||
1264 | static const char *read_stub_str_index (struct dwarf2_cu *cu, | |
1265 | ULONGEST str_index); | |
3019eac3 | 1266 | |
e142c38c | 1267 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1268 | |
e142c38c DJ |
1269 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1270 | struct dwarf2_cu *); | |
c906108c | 1271 | |
348e048f | 1272 | static struct attribute *dwarf2_attr_no_follow (struct die_info *, |
45e58e77 | 1273 | unsigned int); |
348e048f | 1274 | |
7d45c7c3 KB |
1275 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
1276 | struct dwarf2_cu *cu); | |
1277 | ||
a084a2a6 AT |
1278 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1279 | ||
05cf31d1 JB |
1280 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
1281 | struct dwarf2_cu *cu); | |
1282 | ||
e142c38c | 1283 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1284 | |
e142c38c | 1285 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1286 | struct dwarf2_cu **); |
63d06c5c | 1287 | |
9c541725 | 1288 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1289 | struct dwarf2_cu *cu); |
debd256d | 1290 | |
f3f5162e | 1291 | static void dwarf_decode_lines (struct line_header *, const char *, |
891813be | 1292 | struct dwarf2_cu *, dwarf2_psymtab *, |
527f3840 | 1293 | CORE_ADDR, int decode_mapping); |
c906108c | 1294 | |
804d2729 TT |
1295 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1296 | const char *); | |
c906108c | 1297 | |
a14ed312 | 1298 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1299 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1300 | |
ff39bb5e | 1301 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1302 | struct dwarf2_cu *); |
c906108c | 1303 | |
ff39bb5e | 1304 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1305 | struct type *type, |
1306 | const char *name, | |
1307 | struct obstack *obstack, | |
12df843f | 1308 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1309 | const gdb_byte **bytes, |
98bfdba5 | 1310 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1311 | |
e7c27a73 | 1312 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1313 | |
b4ba55a1 JB |
1314 | static int need_gnat_info (struct dwarf2_cu *); |
1315 | ||
3e43a32a MS |
1316 | static struct type *die_descriptive_type (struct die_info *, |
1317 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1318 | |
1319 | static void set_descriptive_type (struct type *, struct die_info *, | |
1320 | struct dwarf2_cu *); | |
1321 | ||
e7c27a73 DJ |
1322 | static struct type *die_containing_type (struct die_info *, |
1323 | struct dwarf2_cu *); | |
c906108c | 1324 | |
ff39bb5e | 1325 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1326 | struct dwarf2_cu *); |
c906108c | 1327 | |
f792889a | 1328 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1329 | |
673bfd45 DE |
1330 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1331 | ||
0d5cff50 | 1332 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1333 | |
6e70227d | 1334 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1335 | const char *suffix, int physname, |
1336 | struct dwarf2_cu *cu); | |
63d06c5c | 1337 | |
e7c27a73 | 1338 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1339 | |
348e048f DE |
1340 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1341 | ||
e7c27a73 | 1342 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1343 | |
e7c27a73 | 1344 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1345 | |
96408a79 SA |
1346 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1347 | ||
71a3c369 TT |
1348 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1349 | ||
ff013f42 | 1350 | static int dwarf2_ranges_read (unsigned, CORE_ADDR *, CORE_ADDR *, |
891813be | 1351 | struct dwarf2_cu *, dwarf2_psymtab *); |
ff013f42 | 1352 | |
3a2b436a | 1353 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1354 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1355 | enum pc_bounds_kind |
1356 | { | |
e385593e | 1357 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1358 | PC_BOUNDS_NOT_PRESENT, |
1359 | ||
e385593e JK |
1360 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1361 | were present but they do not form a valid range of PC addresses. */ | |
1362 | PC_BOUNDS_INVALID, | |
1363 | ||
3a2b436a JK |
1364 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1365 | PC_BOUNDS_RANGES, | |
1366 | ||
1367 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1368 | PC_BOUNDS_HIGH_LOW, | |
1369 | }; | |
1370 | ||
1371 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1372 | CORE_ADDR *, CORE_ADDR *, | |
1373 | struct dwarf2_cu *, | |
891813be | 1374 | dwarf2_psymtab *); |
c906108c | 1375 | |
fae299cd DC |
1376 | static void get_scope_pc_bounds (struct die_info *, |
1377 | CORE_ADDR *, CORE_ADDR *, | |
1378 | struct dwarf2_cu *); | |
1379 | ||
801e3a5b JB |
1380 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
1381 | CORE_ADDR, struct dwarf2_cu *); | |
1382 | ||
a14ed312 | 1383 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1384 | struct dwarf2_cu *); |
c906108c | 1385 | |
a14ed312 | 1386 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1387 | struct type *, struct dwarf2_cu *); |
c906108c | 1388 | |
a14ed312 | 1389 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1390 | struct die_info *, struct type *, |
e7c27a73 | 1391 | struct dwarf2_cu *); |
c906108c | 1392 | |
a14ed312 | 1393 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1394 | struct type *, |
1395 | struct dwarf2_cu *); | |
c906108c | 1396 | |
134d01f1 | 1397 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1398 | |
e7c27a73 | 1399 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1400 | |
e7c27a73 | 1401 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1402 | |
5d7cb8df JK |
1403 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1404 | ||
804d2729 | 1405 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1406 | |
27aa8d6a SW |
1407 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1408 | ||
74921315 KS |
1409 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1410 | ||
f55ee35c JK |
1411 | static struct type *read_module_type (struct die_info *die, |
1412 | struct dwarf2_cu *cu); | |
1413 | ||
38d518c9 | 1414 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1415 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1416 | |
134d01f1 | 1417 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1418 | |
e7c27a73 | 1419 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *); |
c906108c | 1420 | |
6e70227d | 1421 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1422 | struct dwarf2_cu *); |
1423 | ||
bf6af496 | 1424 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1425 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1426 | struct die_info *); |
639d11d3 | 1427 | |
dee91e82 | 1428 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1429 | const gdb_byte *info_ptr, |
1430 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1431 | struct die_info *parent); |
1432 | ||
d521ce57 TT |
1433 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1434 | struct die_info **, const gdb_byte *, | |
3e225074 | 1435 | int); |
3019eac3 | 1436 | |
d521ce57 | 1437 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
3e225074 | 1438 | struct die_info **, const gdb_byte *); |
93311388 | 1439 | |
e7c27a73 | 1440 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1441 | |
15d034d0 | 1442 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
be1e3d3e | 1443 | struct objfile *); |
71c25dea | 1444 | |
15d034d0 | 1445 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1446 | |
15d034d0 | 1447 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1448 | struct die_info *die, |
1449 | struct dwarf2_cu *cu); | |
1450 | ||
ca69b9e6 DE |
1451 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1452 | struct dwarf2_cu *cu); | |
1453 | ||
e142c38c | 1454 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1455 | struct dwarf2_cu **); |
9219021c | 1456 | |
f39c6ffd | 1457 | static const char *dwarf_tag_name (unsigned int); |
c906108c | 1458 | |
f39c6ffd | 1459 | static const char *dwarf_attr_name (unsigned int); |
c906108c | 1460 | |
f39c6ffd | 1461 | static const char *dwarf_form_name (unsigned int); |
c906108c | 1462 | |
a121b7c1 | 1463 | static const char *dwarf_bool_name (unsigned int); |
c906108c | 1464 | |
f39c6ffd | 1465 | static const char *dwarf_type_encoding_name (unsigned int); |
c906108c | 1466 | |
f9aca02d | 1467 | static struct die_info *sibling_die (struct die_info *); |
c906108c | 1468 | |
d97bc12b DE |
1469 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1470 | ||
1471 | static void dump_die_for_error (struct die_info *); | |
1472 | ||
1473 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1474 | struct die_info *); | |
c906108c | 1475 | |
d97bc12b | 1476 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1477 | |
51545339 | 1478 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1479 | struct dwarf2_cu *); |
c906108c | 1480 | |
ff39bb5e | 1481 | static sect_offset dwarf2_get_ref_die_offset (const struct attribute *); |
c906108c | 1482 | |
ff39bb5e | 1483 | static LONGEST dwarf2_get_attr_constant_value (const struct attribute *, int); |
a02abb62 | 1484 | |
348e048f | 1485 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1486 | const struct attribute *, |
348e048f DE |
1487 | struct dwarf2_cu **); |
1488 | ||
10b3939b | 1489 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1490 | const struct attribute *, |
f2f0e013 | 1491 | struct dwarf2_cu **); |
c906108c | 1492 | |
348e048f | 1493 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1494 | const struct attribute *, |
348e048f DE |
1495 | struct dwarf2_cu **); |
1496 | ||
ac9ec31b DE |
1497 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1498 | struct dwarf2_cu *); | |
1499 | ||
1500 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1501 | const struct attribute *, |
ac9ec31b DE |
1502 | struct dwarf2_cu *); |
1503 | ||
e5fe5e75 | 1504 | static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu); |
348e048f | 1505 | |
52dc124a | 1506 | static void read_signatured_type (struct signatured_type *); |
348e048f | 1507 | |
63e43d3a PMR |
1508 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1509 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1510 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1511 | |
c906108c SS |
1512 | /* memory allocation interface */ |
1513 | ||
7b5a2f43 | 1514 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1515 | |
b60c80d6 | 1516 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1517 | |
43f3e411 | 1518 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1519 | |
8cf6f0b1 TT |
1520 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1521 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1522 | const struct attribute *attr); |
8cf6f0b1 | 1523 | |
ff39bb5e | 1524 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1525 | struct symbol *sym, |
f1e6e072 TT |
1526 | struct dwarf2_cu *cu, |
1527 | int is_block); | |
4c2df51b | 1528 | |
d521ce57 TT |
1529 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1530 | const gdb_byte *info_ptr, | |
1531 | struct abbrev_info *abbrev); | |
4bb7a0a7 | 1532 | |
72bf9492 DJ |
1533 | static hashval_t partial_die_hash (const void *item); |
1534 | ||
1535 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1536 | ||
ae038cb0 | 1537 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 SM |
1538 | (sect_offset sect_off, unsigned int offset_in_dwz, |
1539 | struct dwarf2_per_objfile *dwarf2_per_objfile); | |
ae038cb0 | 1540 | |
9816fde3 | 1541 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1542 | struct die_info *comp_unit_die, |
1543 | enum language pretend_language); | |
93311388 | 1544 | |
ed2dc618 | 1545 | static void age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1546 | |
dee91e82 | 1547 | static void free_one_cached_comp_unit (struct dwarf2_per_cu_data *); |
ae038cb0 | 1548 | |
f792889a DJ |
1549 | static struct type *set_die_type (struct die_info *, struct type *, |
1550 | struct dwarf2_cu *); | |
1c379e20 | 1551 | |
ed2dc618 | 1552 | static void create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
ae038cb0 | 1553 | |
ed2dc618 | 1554 | static int create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile); |
1fd400ff | 1555 | |
58f0c718 | 1556 | static void load_full_comp_unit (struct dwarf2_per_cu_data *, bool, |
95554aad | 1557 | enum language); |
10b3939b | 1558 | |
95554aad TT |
1559 | static void process_full_comp_unit (struct dwarf2_per_cu_data *, |
1560 | enum language); | |
10b3939b | 1561 | |
f4dc4d17 DE |
1562 | static void process_full_type_unit (struct dwarf2_per_cu_data *, |
1563 | enum language); | |
1564 | ||
10b3939b DJ |
1565 | static void dwarf2_add_dependence (struct dwarf2_cu *, |
1566 | struct dwarf2_per_cu_data *); | |
1567 | ||
ae038cb0 DJ |
1568 | static void dwarf2_mark (struct dwarf2_cu *); |
1569 | ||
1570 | static void dwarf2_clear_marks (struct dwarf2_per_cu_data *); | |
1571 | ||
b64f50a1 | 1572 | static struct type *get_die_type_at_offset (sect_offset, |
ac9ec31b | 1573 | struct dwarf2_per_cu_data *); |
673bfd45 | 1574 | |
f792889a | 1575 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1576 | |
95554aad TT |
1577 | static void queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
1578 | enum language pretend_language); | |
1579 | ||
ed2dc618 | 1580 | static void process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile); |
9291a0cd | 1581 | |
b303c6f6 AB |
1582 | /* Class, the destructor of which frees all allocated queue entries. This |
1583 | will only have work to do if an error was thrown while processing the | |
1584 | dwarf. If no error was thrown then the queue entries should have all | |
1585 | been processed, and freed, as we went along. */ | |
1586 | ||
1587 | class dwarf2_queue_guard | |
1588 | { | |
1589 | public: | |
39856def TT |
1590 | explicit dwarf2_queue_guard (dwarf2_per_objfile *per_objfile) |
1591 | : m_per_objfile (per_objfile) | |
1592 | { | |
1593 | } | |
b303c6f6 AB |
1594 | |
1595 | /* Free any entries remaining on the queue. There should only be | |
1596 | entries left if we hit an error while processing the dwarf. */ | |
1597 | ~dwarf2_queue_guard () | |
1598 | { | |
39856def TT |
1599 | /* Ensure that no memory is allocated by the queue. */ |
1600 | std::queue<dwarf2_queue_item> empty; | |
1601 | std::swap (m_per_objfile->queue, empty); | |
1602 | } | |
b303c6f6 | 1603 | |
39856def | 1604 | DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard); |
b303c6f6 | 1605 | |
39856def TT |
1606 | private: |
1607 | dwarf2_per_objfile *m_per_objfile; | |
b303c6f6 AB |
1608 | }; |
1609 | ||
39856def TT |
1610 | dwarf2_queue_item::~dwarf2_queue_item () |
1611 | { | |
1612 | /* Anything still marked queued is likely to be in an | |
1613 | inconsistent state, so discard it. */ | |
1614 | if (per_cu->queued) | |
1615 | { | |
1616 | if (per_cu->cu != NULL) | |
1617 | free_one_cached_comp_unit (per_cu); | |
1618 | per_cu->queued = 0; | |
1619 | } | |
1620 | } | |
1621 | ||
d721ba37 PA |
1622 | /* The return type of find_file_and_directory. Note, the enclosed |
1623 | string pointers are only valid while this object is valid. */ | |
1624 | ||
1625 | struct file_and_directory | |
1626 | { | |
1627 | /* The filename. This is never NULL. */ | |
1628 | const char *name; | |
1629 | ||
1630 | /* The compilation directory. NULL if not known. If we needed to | |
1631 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1632 | points directly to the DW_AT_comp_dir string attribute owned by | |
1633 | the obstack that owns the DIE. */ | |
1634 | const char *comp_dir; | |
1635 | ||
1636 | /* If we needed to build a new string for comp_dir, this is what | |
1637 | owns the storage. */ | |
1638 | std::string comp_dir_storage; | |
1639 | }; | |
1640 | ||
1641 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1642 | struct dwarf2_cu *cu); | |
9291a0cd | 1643 | |
298e9637 | 1644 | static htab_up allocate_signatured_type_table (); |
1fd400ff | 1645 | |
298e9637 | 1646 | static htab_up allocate_dwo_unit_table (); |
3019eac3 | 1647 | |
57d63ce2 | 1648 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
ed2dc618 SM |
1649 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
1650 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 1651 | ULONGEST signature, int is_debug_types); |
a2ce51a0 | 1652 | |
ed2dc618 SM |
1653 | static struct dwp_file *get_dwp_file |
1654 | (struct dwarf2_per_objfile *dwarf2_per_objfile); | |
a2ce51a0 | 1655 | |
3019eac3 | 1656 | static struct dwo_unit *lookup_dwo_comp_unit |
a1855c1d | 1657 | (struct dwarf2_per_cu_data *, const char *, const char *, ULONGEST); |
3019eac3 DE |
1658 | |
1659 | static struct dwo_unit *lookup_dwo_type_unit | |
a1855c1d | 1660 | (struct signatured_type *, const char *, const char *); |
3019eac3 | 1661 | |
89e63ee4 DE |
1662 | static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *); |
1663 | ||
263db9a1 TT |
1664 | /* A unique pointer to a dwo_file. */ |
1665 | ||
51ac9db5 | 1666 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 1667 | |
ed2dc618 | 1668 | static void process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile); |
95554aad | 1669 | |
1b80a9fa | 1670 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1671 | |
1672 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1673 | \f |
1674 | /* Various complaints about symbol reading that don't abort the process. */ | |
1675 | ||
1676 | static void | |
1677 | dwarf2_statement_list_fits_in_line_number_section_complaint (void) | |
1678 | { | |
b98664d3 | 1679 | complaint (_("statement list doesn't fit in .debug_line section")); |
4390d890 DE |
1680 | } |
1681 | ||
1682 | static void | |
1683 | dwarf2_debug_line_missing_file_complaint (void) | |
1684 | { | |
b98664d3 | 1685 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
1686 | } |
1687 | ||
1688 | static void | |
1689 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1690 | { | |
b98664d3 | 1691 | complaint (_(".debug_line section has line " |
4390d890 DE |
1692 | "program sequence without an end")); |
1693 | } | |
1694 | ||
1695 | static void | |
1696 | dwarf2_complex_location_expr_complaint (void) | |
1697 | { | |
b98664d3 | 1698 | complaint (_("location expression too complex")); |
4390d890 DE |
1699 | } |
1700 | ||
1701 | static void | |
1702 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1703 | int arg3) | |
1704 | { | |
b98664d3 | 1705 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
1706 | arg1, arg2, arg3); |
1707 | } | |
1708 | ||
4390d890 DE |
1709 | static void |
1710 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1711 | { | |
b98664d3 | 1712 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
1713 | arg1, arg2); |
1714 | } | |
527f3840 JK |
1715 | |
1716 | /* Hash function for line_header_hash. */ | |
1717 | ||
1718 | static hashval_t | |
1719 | line_header_hash (const struct line_header *ofs) | |
1720 | { | |
9c541725 | 1721 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
1722 | } |
1723 | ||
1724 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1725 | ||
1726 | static hashval_t | |
1727 | line_header_hash_voidp (const void *item) | |
1728 | { | |
9a3c8263 | 1729 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1730 | |
1731 | return line_header_hash (ofs); | |
1732 | } | |
1733 | ||
1734 | /* Equality function for line_header_hash. */ | |
1735 | ||
1736 | static int | |
1737 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1738 | { | |
9a3c8263 SM |
1739 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1740 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 1741 | |
9c541725 | 1742 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
1743 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
1744 | } | |
1745 | ||
4390d890 | 1746 | \f |
9291a0cd | 1747 | |
330cdd98 PA |
1748 | /* See declaration. */ |
1749 | ||
1750 | dwarf2_per_objfile::dwarf2_per_objfile (struct objfile *objfile_, | |
4b610737 TT |
1751 | const dwarf2_debug_sections *names, |
1752 | bool can_copy_) | |
1753 | : objfile (objfile_), | |
1754 | can_copy (can_copy_) | |
330cdd98 PA |
1755 | { |
1756 | if (names == NULL) | |
1757 | names = &dwarf2_elf_names; | |
1758 | ||
1759 | bfd *obfd = objfile->obfd; | |
1760 | ||
1761 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) | |
1762 | locate_sections (obfd, sec, *names); | |
1763 | } | |
1764 | ||
1765 | dwarf2_per_objfile::~dwarf2_per_objfile () | |
1766 | { | |
1767 | /* Cached DIE trees use xmalloc and the comp_unit_obstack. */ | |
1768 | free_cached_comp_units (); | |
1769 | ||
b76e467d | 1770 | for (dwarf2_per_cu_data *per_cu : all_comp_units) |
ae640021 | 1771 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 1772 | |
b2bdb8cf | 1773 | for (signatured_type *sig_type : all_type_units) |
ae640021 | 1774 | sig_type->per_cu.imported_symtabs_free (); |
fc8e7e75 | 1775 | |
330cdd98 PA |
1776 | /* Everything else should be on the objfile obstack. */ |
1777 | } | |
1778 | ||
1779 | /* See declaration. */ | |
1780 | ||
1781 | void | |
1782 | dwarf2_per_objfile::free_cached_comp_units () | |
1783 | { | |
1784 | dwarf2_per_cu_data *per_cu = read_in_chain; | |
1785 | dwarf2_per_cu_data **last_chain = &read_in_chain; | |
1786 | while (per_cu != NULL) | |
1787 | { | |
1788 | dwarf2_per_cu_data *next_cu = per_cu->cu->read_in_chain; | |
1789 | ||
fcd3b13d | 1790 | delete per_cu->cu; |
330cdd98 PA |
1791 | *last_chain = next_cu; |
1792 | per_cu = next_cu; | |
1793 | } | |
1794 | } | |
1795 | ||
11ed8cad TT |
1796 | /* A helper class that calls free_cached_comp_units on |
1797 | destruction. */ | |
1798 | ||
1799 | class free_cached_comp_units | |
1800 | { | |
1801 | public: | |
1802 | ||
1803 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
1804 | : m_per_objfile (per_objfile) | |
1805 | { | |
1806 | } | |
1807 | ||
1808 | ~free_cached_comp_units () | |
1809 | { | |
1810 | m_per_objfile->free_cached_comp_units (); | |
1811 | } | |
1812 | ||
1813 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
1814 | ||
1815 | private: | |
1816 | ||
1817 | dwarf2_per_objfile *m_per_objfile; | |
1818 | }; | |
1819 | ||
c906108c | 1820 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1821 | information and return true if we have enough to do something. |
1822 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
1823 | ELF names are used. CAN_COPY is true for formats where symbol |
1824 | interposition is possible and so symbol values must follow copy | |
1825 | relocation rules. */ | |
c906108c SS |
1826 | |
1827 | int | |
251d32d9 | 1828 | dwarf2_has_info (struct objfile *objfile, |
4b610737 TT |
1829 | const struct dwarf2_debug_sections *names, |
1830 | bool can_copy) | |
c906108c | 1831 | { |
97cbe998 SDJ |
1832 | if (objfile->flags & OBJF_READNEVER) |
1833 | return 0; | |
1834 | ||
ed2dc618 SM |
1835 | struct dwarf2_per_objfile *dwarf2_per_objfile |
1836 | = get_dwarf2_per_objfile (objfile); | |
1837 | ||
1838 | if (dwarf2_per_objfile == NULL) | |
5bfd760d | 1839 | dwarf2_per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, |
4b610737 TT |
1840 | names, |
1841 | can_copy); | |
5bfd760d | 1842 | |
73869dc2 | 1843 | return (!dwarf2_per_objfile->info.is_virtual |
049412e3 | 1844 | && dwarf2_per_objfile->info.s.section != NULL |
73869dc2 | 1845 | && !dwarf2_per_objfile->abbrev.is_virtual |
049412e3 | 1846 | && dwarf2_per_objfile->abbrev.s.section != NULL); |
73869dc2 DE |
1847 | } |
1848 | ||
251d32d9 TG |
1849 | /* When loading sections, we look either for uncompressed section or for |
1850 | compressed section names. */ | |
233a11ab CS |
1851 | |
1852 | static int | |
251d32d9 TG |
1853 | section_is_p (const char *section_name, |
1854 | const struct dwarf2_section_names *names) | |
233a11ab | 1855 | { |
251d32d9 TG |
1856 | if (names->normal != NULL |
1857 | && strcmp (section_name, names->normal) == 0) | |
1858 | return 1; | |
1859 | if (names->compressed != NULL | |
1860 | && strcmp (section_name, names->compressed) == 0) | |
1861 | return 1; | |
1862 | return 0; | |
233a11ab CS |
1863 | } |
1864 | ||
330cdd98 | 1865 | /* See declaration. */ |
c906108c | 1866 | |
330cdd98 PA |
1867 | void |
1868 | dwarf2_per_objfile::locate_sections (bfd *abfd, asection *sectp, | |
1869 | const dwarf2_debug_sections &names) | |
c906108c | 1870 | { |
fd361982 | 1871 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 1872 | |
dc7650b8 JK |
1873 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1874 | { | |
1875 | } | |
950b7495 KS |
1876 | else if (elf_section_data (sectp)->this_hdr.sh_size |
1877 | > bfd_get_file_size (abfd)) | |
1878 | { | |
1879 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
1880 | warning (_("Discarding section %s which has a section size (%s" | |
1881 | ") larger than the file size [in module %s]"), | |
1882 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
1883 | bfd_get_filename (abfd)); | |
1884 | } | |
330cdd98 | 1885 | else if (section_is_p (sectp->name, &names.info)) |
c906108c | 1886 | { |
330cdd98 | 1887 | this->info.s.section = sectp; |
fd361982 | 1888 | this->info.size = bfd_section_size (sectp); |
c906108c | 1889 | } |
330cdd98 | 1890 | else if (section_is_p (sectp->name, &names.abbrev)) |
c906108c | 1891 | { |
330cdd98 | 1892 | this->abbrev.s.section = sectp; |
fd361982 | 1893 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 1894 | } |
330cdd98 | 1895 | else if (section_is_p (sectp->name, &names.line)) |
c906108c | 1896 | { |
330cdd98 | 1897 | this->line.s.section = sectp; |
fd361982 | 1898 | this->line.size = bfd_section_size (sectp); |
c906108c | 1899 | } |
330cdd98 | 1900 | else if (section_is_p (sectp->name, &names.loc)) |
c906108c | 1901 | { |
330cdd98 | 1902 | this->loc.s.section = sectp; |
fd361982 | 1903 | this->loc.size = bfd_section_size (sectp); |
c906108c | 1904 | } |
330cdd98 | 1905 | else if (section_is_p (sectp->name, &names.loclists)) |
43988095 | 1906 | { |
330cdd98 | 1907 | this->loclists.s.section = sectp; |
fd361982 | 1908 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 1909 | } |
330cdd98 | 1910 | else if (section_is_p (sectp->name, &names.macinfo)) |
c906108c | 1911 | { |
330cdd98 | 1912 | this->macinfo.s.section = sectp; |
fd361982 | 1913 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 1914 | } |
330cdd98 | 1915 | else if (section_is_p (sectp->name, &names.macro)) |
cf2c3c16 | 1916 | { |
330cdd98 | 1917 | this->macro.s.section = sectp; |
fd361982 | 1918 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 1919 | } |
330cdd98 | 1920 | else if (section_is_p (sectp->name, &names.str)) |
c906108c | 1921 | { |
330cdd98 | 1922 | this->str.s.section = sectp; |
fd361982 | 1923 | this->str.size = bfd_section_size (sectp); |
c906108c | 1924 | } |
18a8505e AT |
1925 | else if (section_is_p (sectp->name, &names.str_offsets)) |
1926 | { | |
1927 | this->str_offsets.s.section = sectp; | |
1928 | this->str_offsets.size = bfd_section_size (sectp); | |
1929 | } | |
330cdd98 | 1930 | else if (section_is_p (sectp->name, &names.line_str)) |
43988095 | 1931 | { |
330cdd98 | 1932 | this->line_str.s.section = sectp; |
fd361982 | 1933 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 1934 | } |
330cdd98 | 1935 | else if (section_is_p (sectp->name, &names.addr)) |
3019eac3 | 1936 | { |
330cdd98 | 1937 | this->addr.s.section = sectp; |
fd361982 | 1938 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 1939 | } |
330cdd98 | 1940 | else if (section_is_p (sectp->name, &names.frame)) |
b6af0555 | 1941 | { |
330cdd98 | 1942 | this->frame.s.section = sectp; |
fd361982 | 1943 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 1944 | } |
330cdd98 | 1945 | else if (section_is_p (sectp->name, &names.eh_frame)) |
b6af0555 | 1946 | { |
330cdd98 | 1947 | this->eh_frame.s.section = sectp; |
fd361982 | 1948 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 1949 | } |
330cdd98 | 1950 | else if (section_is_p (sectp->name, &names.ranges)) |
af34e669 | 1951 | { |
330cdd98 | 1952 | this->ranges.s.section = sectp; |
fd361982 | 1953 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 1954 | } |
330cdd98 | 1955 | else if (section_is_p (sectp->name, &names.rnglists)) |
43988095 | 1956 | { |
330cdd98 | 1957 | this->rnglists.s.section = sectp; |
fd361982 | 1958 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 1959 | } |
330cdd98 | 1960 | else if (section_is_p (sectp->name, &names.types)) |
348e048f | 1961 | { |
8b70b953 TT |
1962 | struct dwarf2_section_info type_section; |
1963 | ||
1964 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 1965 | type_section.s.section = sectp; |
fd361982 | 1966 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 1967 | |
fd5866f6 | 1968 | this->types.push_back (type_section); |
348e048f | 1969 | } |
330cdd98 | 1970 | else if (section_is_p (sectp->name, &names.gdb_index)) |
9291a0cd | 1971 | { |
330cdd98 | 1972 | this->gdb_index.s.section = sectp; |
fd361982 | 1973 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 1974 | } |
927aa2e7 JK |
1975 | else if (section_is_p (sectp->name, &names.debug_names)) |
1976 | { | |
1977 | this->debug_names.s.section = sectp; | |
fd361982 | 1978 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 JK |
1979 | } |
1980 | else if (section_is_p (sectp->name, &names.debug_aranges)) | |
1981 | { | |
1982 | this->debug_aranges.s.section = sectp; | |
fd361982 | 1983 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 1984 | } |
dce234bc | 1985 | |
fd361982 AM |
1986 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
1987 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 1988 | this->has_section_at_zero = true; |
c906108c SS |
1989 | } |
1990 | ||
dce234bc | 1991 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 1992 | SECTION_NAME. */ |
af34e669 | 1993 | |
dce234bc | 1994 | void |
3017a003 TG |
1995 | dwarf2_get_section_info (struct objfile *objfile, |
1996 | enum dwarf2_section_enum sect, | |
d521ce57 | 1997 | asection **sectp, const gdb_byte **bufp, |
dce234bc PP |
1998 | bfd_size_type *sizep) |
1999 | { | |
5bfd760d | 2000 | struct dwarf2_per_objfile *data = dwarf2_objfile_data_key.get (objfile); |
dce234bc | 2001 | struct dwarf2_section_info *info; |
a3b2a86b TT |
2002 | |
2003 | /* We may see an objfile without any DWARF, in which case we just | |
2004 | return nothing. */ | |
2005 | if (data == NULL) | |
2006 | { | |
2007 | *sectp = NULL; | |
2008 | *bufp = NULL; | |
2009 | *sizep = 0; | |
2010 | return; | |
2011 | } | |
3017a003 TG |
2012 | switch (sect) |
2013 | { | |
2014 | case DWARF2_DEBUG_FRAME: | |
2015 | info = &data->frame; | |
2016 | break; | |
2017 | case DWARF2_EH_FRAME: | |
2018 | info = &data->eh_frame; | |
2019 | break; | |
2020 | default: | |
2021 | gdb_assert_not_reached ("unexpected section"); | |
2022 | } | |
dce234bc | 2023 | |
96b79293 | 2024 | info->read (objfile); |
dce234bc | 2025 | |
96b79293 | 2026 | *sectp = info->get_bfd_section (); |
dce234bc PP |
2027 | *bufp = info->buffer; |
2028 | *sizep = info->size; | |
2029 | } | |
2030 | ||
36586728 TT |
2031 | /* A helper function to find the sections for a .dwz file. */ |
2032 | ||
2033 | static void | |
2034 | locate_dwz_sections (bfd *abfd, asection *sectp, void *arg) | |
2035 | { | |
9a3c8263 | 2036 | struct dwz_file *dwz_file = (struct dwz_file *) arg; |
36586728 TT |
2037 | |
2038 | /* Note that we only support the standard ELF names, because .dwz | |
2039 | is ELF-only (at the time of writing). */ | |
2040 | if (section_is_p (sectp->name, &dwarf2_elf_names.abbrev)) | |
2041 | { | |
049412e3 | 2042 | dwz_file->abbrev.s.section = sectp; |
fd361982 | 2043 | dwz_file->abbrev.size = bfd_section_size (sectp); |
36586728 TT |
2044 | } |
2045 | else if (section_is_p (sectp->name, &dwarf2_elf_names.info)) | |
2046 | { | |
049412e3 | 2047 | dwz_file->info.s.section = sectp; |
fd361982 | 2048 | dwz_file->info.size = bfd_section_size (sectp); |
36586728 TT |
2049 | } |
2050 | else if (section_is_p (sectp->name, &dwarf2_elf_names.str)) | |
2051 | { | |
049412e3 | 2052 | dwz_file->str.s.section = sectp; |
fd361982 | 2053 | dwz_file->str.size = bfd_section_size (sectp); |
36586728 TT |
2054 | } |
2055 | else if (section_is_p (sectp->name, &dwarf2_elf_names.line)) | |
2056 | { | |
049412e3 | 2057 | dwz_file->line.s.section = sectp; |
fd361982 | 2058 | dwz_file->line.size = bfd_section_size (sectp); |
36586728 TT |
2059 | } |
2060 | else if (section_is_p (sectp->name, &dwarf2_elf_names.macro)) | |
2061 | { | |
049412e3 | 2062 | dwz_file->macro.s.section = sectp; |
fd361982 | 2063 | dwz_file->macro.size = bfd_section_size (sectp); |
36586728 | 2064 | } |
2ec9a5e0 TT |
2065 | else if (section_is_p (sectp->name, &dwarf2_elf_names.gdb_index)) |
2066 | { | |
049412e3 | 2067 | dwz_file->gdb_index.s.section = sectp; |
fd361982 | 2068 | dwz_file->gdb_index.size = bfd_section_size (sectp); |
2ec9a5e0 | 2069 | } |
927aa2e7 JK |
2070 | else if (section_is_p (sectp->name, &dwarf2_elf_names.debug_names)) |
2071 | { | |
2072 | dwz_file->debug_names.s.section = sectp; | |
fd361982 | 2073 | dwz_file->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 2074 | } |
36586728 TT |
2075 | } |
2076 | ||
c4973306 | 2077 | /* See dwarf2read.h. */ |
36586728 | 2078 | |
c4973306 | 2079 | struct dwz_file * |
ed2dc618 | 2080 | dwarf2_get_dwz_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 2081 | { |
36586728 | 2082 | const char *filename; |
acd13123 | 2083 | bfd_size_type buildid_len_arg; |
dc294be5 TT |
2084 | size_t buildid_len; |
2085 | bfd_byte *buildid; | |
36586728 TT |
2086 | |
2087 | if (dwarf2_per_objfile->dwz_file != NULL) | |
7ff8cb8c | 2088 | return dwarf2_per_objfile->dwz_file.get (); |
36586728 | 2089 | |
4db1a1dc | 2090 | bfd_set_error (bfd_error_no_error); |
791afaa2 TT |
2091 | gdb::unique_xmalloc_ptr<char> data |
2092 | (bfd_get_alt_debug_link_info (dwarf2_per_objfile->objfile->obfd, | |
2093 | &buildid_len_arg, &buildid)); | |
4db1a1dc TT |
2094 | if (data == NULL) |
2095 | { | |
2096 | if (bfd_get_error () == bfd_error_no_error) | |
2097 | return NULL; | |
2098 | error (_("could not read '.gnu_debugaltlink' section: %s"), | |
2099 | bfd_errmsg (bfd_get_error ())); | |
2100 | } | |
791afaa2 TT |
2101 | |
2102 | gdb::unique_xmalloc_ptr<bfd_byte> buildid_holder (buildid); | |
36586728 | 2103 | |
acd13123 TT |
2104 | buildid_len = (size_t) buildid_len_arg; |
2105 | ||
791afaa2 | 2106 | filename = data.get (); |
d721ba37 PA |
2107 | |
2108 | std::string abs_storage; | |
36586728 TT |
2109 | if (!IS_ABSOLUTE_PATH (filename)) |
2110 | { | |
14278e1f TT |
2111 | gdb::unique_xmalloc_ptr<char> abs |
2112 | = gdb_realpath (objfile_name (dwarf2_per_objfile->objfile)); | |
36586728 | 2113 | |
14278e1f | 2114 | abs_storage = ldirname (abs.get ()) + SLASH_STRING + filename; |
d721ba37 | 2115 | filename = abs_storage.c_str (); |
36586728 TT |
2116 | } |
2117 | ||
dc294be5 TT |
2118 | /* First try the file name given in the section. If that doesn't |
2119 | work, try to use the build-id instead. */ | |
192b62ce | 2120 | gdb_bfd_ref_ptr dwz_bfd (gdb_bfd_open (filename, gnutarget, -1)); |
dc294be5 | 2121 | if (dwz_bfd != NULL) |
36586728 | 2122 | { |
192b62ce | 2123 | if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) |
0f58c9e8 | 2124 | dwz_bfd.reset (nullptr); |
36586728 TT |
2125 | } |
2126 | ||
dc294be5 TT |
2127 | if (dwz_bfd == NULL) |
2128 | dwz_bfd = build_id_to_debug_bfd (buildid_len, buildid); | |
2129 | ||
0d79cdc4 AM |
2130 | if (dwz_bfd == nullptr) |
2131 | { | |
2132 | gdb::unique_xmalloc_ptr<char> alt_filename; | |
2133 | const char *origname = dwarf2_per_objfile->objfile->original_name; | |
2134 | ||
2135 | scoped_fd fd (debuginfod_debuginfo_query (buildid, | |
2136 | buildid_len, | |
2137 | origname, | |
2138 | &alt_filename)); | |
2139 | ||
2140 | if (fd.get () >= 0) | |
2141 | { | |
2142 | /* File successfully retrieved from server. */ | |
2143 | dwz_bfd = gdb_bfd_open (alt_filename.get (), gnutarget, -1); | |
2144 | ||
2145 | if (dwz_bfd == nullptr) | |
2146 | warning (_("File \"%s\" from debuginfod cannot be opened as bfd"), | |
2147 | alt_filename.get ()); | |
2148 | else if (!build_id_verify (dwz_bfd.get (), buildid_len, buildid)) | |
2149 | dwz_bfd.reset (nullptr); | |
2150 | } | |
2151 | } | |
2152 | ||
dc294be5 TT |
2153 | if (dwz_bfd == NULL) |
2154 | error (_("could not find '.gnu_debugaltlink' file for %s"), | |
2155 | objfile_name (dwarf2_per_objfile->objfile)); | |
2156 | ||
7ff8cb8c TT |
2157 | std::unique_ptr<struct dwz_file> result |
2158 | (new struct dwz_file (std::move (dwz_bfd))); | |
36586728 | 2159 | |
7ff8cb8c TT |
2160 | bfd_map_over_sections (result->dwz_bfd.get (), locate_dwz_sections, |
2161 | result.get ()); | |
36586728 | 2162 | |
7ff8cb8c TT |
2163 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, |
2164 | result->dwz_bfd.get ()); | |
2165 | dwarf2_per_objfile->dwz_file = std::move (result); | |
2166 | return dwarf2_per_objfile->dwz_file.get (); | |
36586728 | 2167 | } |
9291a0cd | 2168 | \f |
7b9f3c50 DE |
2169 | /* DWARF quick_symbols_functions support. */ |
2170 | ||
2171 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
2172 | unique line tables, so we maintain a separate table of all .debug_line | |
2173 | derived entries to support the sharing. | |
2174 | All the quick functions need is the list of file names. We discard the | |
2175 | line_header when we're done and don't need to record it here. */ | |
2176 | struct quick_file_names | |
2177 | { | |
094b34ac DE |
2178 | /* The data used to construct the hash key. */ |
2179 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
2180 | |
2181 | /* The number of entries in file_names, real_names. */ | |
2182 | unsigned int num_file_names; | |
2183 | ||
2184 | /* The file names from the line table, after being run through | |
2185 | file_full_name. */ | |
2186 | const char **file_names; | |
2187 | ||
2188 | /* The file names from the line table after being run through | |
2189 | gdb_realpath. These are computed lazily. */ | |
2190 | const char **real_names; | |
2191 | }; | |
2192 | ||
2193 | /* When using the index (and thus not using psymtabs), each CU has an | |
2194 | object of this type. This is used to hold information needed by | |
2195 | the various "quick" methods. */ | |
2196 | struct dwarf2_per_cu_quick_data | |
2197 | { | |
2198 | /* The file table. This can be NULL if there was no file table | |
2199 | or it's currently not read in. | |
2200 | NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */ | |
2201 | struct quick_file_names *file_names; | |
2202 | ||
2203 | /* The corresponding symbol table. This is NULL if symbols for this | |
2204 | CU have not yet been read. */ | |
43f3e411 | 2205 | struct compunit_symtab *compunit_symtab; |
7b9f3c50 DE |
2206 | |
2207 | /* A temporary mark bit used when iterating over all CUs in | |
2208 | expand_symtabs_matching. */ | |
2209 | unsigned int mark : 1; | |
2210 | ||
2211 | /* True if we've tried to read the file table and found there isn't one. | |
2212 | There will be no point in trying to read it again next time. */ | |
2213 | unsigned int no_file_data : 1; | |
2214 | }; | |
2215 | ||
094b34ac DE |
2216 | /* Utility hash function for a stmt_list_hash. */ |
2217 | ||
2218 | static hashval_t | |
2219 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2220 | { | |
2221 | hashval_t v = 0; | |
2222 | ||
2223 | if (stmt_list_hash->dwo_unit != NULL) | |
2224 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2225 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2226 | return v; |
2227 | } | |
2228 | ||
2229 | /* Utility equality function for a stmt_list_hash. */ | |
2230 | ||
2231 | static int | |
2232 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2233 | const struct stmt_list_hash *rhs) | |
2234 | { | |
2235 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2236 | return 0; | |
2237 | if (lhs->dwo_unit != NULL | |
2238 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2239 | return 0; | |
2240 | ||
9c541725 | 2241 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2242 | } |
2243 | ||
7b9f3c50 DE |
2244 | /* Hash function for a quick_file_names. */ |
2245 | ||
2246 | static hashval_t | |
2247 | hash_file_name_entry (const void *e) | |
2248 | { | |
9a3c8263 SM |
2249 | const struct quick_file_names *file_data |
2250 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2251 | |
094b34ac | 2252 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2253 | } |
2254 | ||
2255 | /* Equality function for a quick_file_names. */ | |
2256 | ||
2257 | static int | |
2258 | eq_file_name_entry (const void *a, const void *b) | |
2259 | { | |
9a3c8263 SM |
2260 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2261 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2262 | |
094b34ac | 2263 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2264 | } |
2265 | ||
2266 | /* Delete function for a quick_file_names. */ | |
2267 | ||
2268 | static void | |
2269 | delete_file_name_entry (void *e) | |
2270 | { | |
9a3c8263 | 2271 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2272 | int i; |
2273 | ||
2274 | for (i = 0; i < file_data->num_file_names; ++i) | |
2275 | { | |
2276 | xfree ((void*) file_data->file_names[i]); | |
2277 | if (file_data->real_names) | |
2278 | xfree ((void*) file_data->real_names[i]); | |
2279 | } | |
2280 | ||
2281 | /* The space for the struct itself lives on objfile_obstack, | |
2282 | so we don't free it here. */ | |
2283 | } | |
2284 | ||
2285 | /* Create a quick_file_names hash table. */ | |
2286 | ||
5895093f | 2287 | static htab_up |
7b9f3c50 DE |
2288 | create_quick_file_names_table (unsigned int nr_initial_entries) |
2289 | { | |
5895093f TT |
2290 | return htab_up (htab_create_alloc (nr_initial_entries, |
2291 | hash_file_name_entry, eq_file_name_entry, | |
2292 | delete_file_name_entry, xcalloc, xfree)); | |
7b9f3c50 | 2293 | } |
9291a0cd | 2294 | |
918dd910 JK |
2295 | /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would |
2296 | have to be created afterwards. You should call age_cached_comp_units after | |
2297 | processing PER_CU->CU. dw2_setup must have been already called. */ | |
2298 | ||
2299 | static void | |
58f0c718 | 2300 | load_cu (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
918dd910 | 2301 | { |
3019eac3 | 2302 | if (per_cu->is_debug_types) |
e5fe5e75 | 2303 | load_full_type_unit (per_cu); |
918dd910 | 2304 | else |
58f0c718 | 2305 | load_full_comp_unit (per_cu, skip_partial, language_minimal); |
918dd910 | 2306 | |
cc12ce38 DE |
2307 | if (per_cu->cu == NULL) |
2308 | return; /* Dummy CU. */ | |
2dc860c0 DE |
2309 | |
2310 | dwarf2_find_base_address (per_cu->cu->dies, per_cu->cu); | |
918dd910 JK |
2311 | } |
2312 | ||
a0f42c21 | 2313 | /* Read in the symbols for PER_CU. */ |
2fdf6df6 | 2314 | |
9291a0cd | 2315 | static void |
58f0c718 | 2316 | dw2_do_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2317 | { |
ed2dc618 | 2318 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9291a0cd | 2319 | |
f4dc4d17 DE |
2320 | /* Skip type_unit_groups, reading the type units they contain |
2321 | is handled elsewhere. */ | |
197400e8 | 2322 | if (per_cu->type_unit_group_p ()) |
f4dc4d17 DE |
2323 | return; |
2324 | ||
b303c6f6 AB |
2325 | /* The destructor of dwarf2_queue_guard frees any entries left on |
2326 | the queue. After this point we're guaranteed to leave this function | |
2327 | with the dwarf queue empty. */ | |
39856def | 2328 | dwarf2_queue_guard q_guard (dwarf2_per_objfile); |
9291a0cd | 2329 | |
95554aad | 2330 | if (dwarf2_per_objfile->using_index |
43f3e411 | 2331 | ? per_cu->v.quick->compunit_symtab == NULL |
95554aad TT |
2332 | : (per_cu->v.psymtab == NULL || !per_cu->v.psymtab->readin)) |
2333 | { | |
2334 | queue_comp_unit (per_cu, language_minimal); | |
58f0c718 | 2335 | load_cu (per_cu, skip_partial); |
89e63ee4 DE |
2336 | |
2337 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2338 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2339 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2340 | if (!per_cu->is_debug_types | |
cc12ce38 | 2341 | && per_cu->cu != NULL |
89e63ee4 DE |
2342 | && per_cu->cu->dwo_unit != NULL |
2343 | && dwarf2_per_objfile->index_table != NULL | |
2344 | && dwarf2_per_objfile->index_table->version <= 7 | |
2345 | /* DWP files aren't supported yet. */ | |
ed2dc618 | 2346 | && get_dwp_file (dwarf2_per_objfile) == NULL) |
89e63ee4 | 2347 | queue_and_load_all_dwo_tus (per_cu); |
95554aad | 2348 | } |
9291a0cd | 2349 | |
ed2dc618 | 2350 | process_queue (dwarf2_per_objfile); |
9291a0cd TT |
2351 | |
2352 | /* Age the cache, releasing compilation units that have not | |
2353 | been used recently. */ | |
ed2dc618 | 2354 | age_cached_comp_units (dwarf2_per_objfile); |
9291a0cd TT |
2355 | } |
2356 | ||
2357 | /* Ensure that the symbols for PER_CU have been read in. OBJFILE is | |
2358 | the objfile from which this CU came. Returns the resulting symbol | |
2359 | table. */ | |
2fdf6df6 | 2360 | |
43f3e411 | 2361 | static struct compunit_symtab * |
58f0c718 | 2362 | dw2_instantiate_symtab (struct dwarf2_per_cu_data *per_cu, bool skip_partial) |
9291a0cd | 2363 | { |
ed2dc618 SM |
2364 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
2365 | ||
95554aad | 2366 | gdb_assert (dwarf2_per_objfile->using_index); |
43f3e411 | 2367 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd | 2368 | { |
11ed8cad | 2369 | free_cached_comp_units freer (dwarf2_per_objfile); |
c83dd867 | 2370 | scoped_restore decrementer = increment_reading_symtab (); |
58f0c718 | 2371 | dw2_do_instantiate_symtab (per_cu, skip_partial); |
ed2dc618 | 2372 | process_cu_includes (dwarf2_per_objfile); |
9291a0cd | 2373 | } |
f194fefb | 2374 | |
43f3e411 | 2375 | return per_cu->v.quick->compunit_symtab; |
9291a0cd TT |
2376 | } |
2377 | ||
ff4c9fec | 2378 | /* See declaration. */ |
f4dc4d17 | 2379 | |
ff4c9fec SM |
2380 | dwarf2_per_cu_data * |
2381 | dwarf2_per_objfile::get_cutu (int index) | |
2382 | { | |
b76e467d | 2383 | if (index >= this->all_comp_units.size ()) |
ff4c9fec | 2384 | { |
b76e467d | 2385 | index -= this->all_comp_units.size (); |
b2bdb8cf | 2386 | gdb_assert (index < this->all_type_units.size ()); |
ff4c9fec SM |
2387 | return &this->all_type_units[index]->per_cu; |
2388 | } | |
f4dc4d17 | 2389 | |
ff4c9fec SM |
2390 | return this->all_comp_units[index]; |
2391 | } | |
f4dc4d17 | 2392 | |
ff4c9fec | 2393 | /* See declaration. */ |
2fdf6df6 | 2394 | |
ff4c9fec SM |
2395 | dwarf2_per_cu_data * |
2396 | dwarf2_per_objfile::get_cu (int index) | |
1fd400ff | 2397 | { |
b76e467d | 2398 | gdb_assert (index >= 0 && index < this->all_comp_units.size ()); |
f4dc4d17 | 2399 | |
ff4c9fec | 2400 | return this->all_comp_units[index]; |
f4dc4d17 DE |
2401 | } |
2402 | ||
ff4c9fec | 2403 | /* See declaration. */ |
f4dc4d17 | 2404 | |
ff4c9fec SM |
2405 | signatured_type * |
2406 | dwarf2_per_objfile::get_tu (int index) | |
f4dc4d17 | 2407 | { |
b2bdb8cf | 2408 | gdb_assert (index >= 0 && index < this->all_type_units.size ()); |
f4dc4d17 | 2409 | |
ff4c9fec | 2410 | return this->all_type_units[index]; |
1fd400ff TT |
2411 | } |
2412 | ||
4b514bc8 JK |
2413 | /* Return a new dwarf2_per_cu_data allocated on OBJFILE's |
2414 | objfile_obstack, and constructed with the specified field | |
2415 | values. */ | |
2416 | ||
2417 | static dwarf2_per_cu_data * | |
ed2dc618 | 2418 | create_cu_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4b514bc8 JK |
2419 | struct dwarf2_section_info *section, |
2420 | int is_dwz, | |
2421 | sect_offset sect_off, ULONGEST length) | |
2422 | { | |
ed2dc618 | 2423 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4b514bc8 JK |
2424 | dwarf2_per_cu_data *the_cu |
2425 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2426 | struct dwarf2_per_cu_data); | |
2427 | the_cu->sect_off = sect_off; | |
2428 | the_cu->length = length; | |
e3b94546 | 2429 | the_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
4b514bc8 JK |
2430 | the_cu->section = section; |
2431 | the_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2432 | struct dwarf2_per_cu_quick_data); | |
2433 | the_cu->is_dwz = is_dwz; | |
2434 | return the_cu; | |
2435 | } | |
2436 | ||
2ec9a5e0 TT |
2437 | /* A helper for create_cus_from_index that handles a given list of |
2438 | CUs. */ | |
2fdf6df6 | 2439 | |
74a0d9f6 | 2440 | static void |
12359b5e | 2441 | create_cus_from_index_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2442 | const gdb_byte *cu_list, offset_type n_elements, |
2443 | struct dwarf2_section_info *section, | |
b76e467d | 2444 | int is_dwz) |
9291a0cd | 2445 | { |
12359b5e | 2446 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2447 | { |
74a0d9f6 | 2448 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2449 | |
2450 | sect_offset sect_off | |
2451 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2452 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2453 | cu_list += 2 * 8; |
2454 | ||
b76e467d | 2455 | dwarf2_per_cu_data *per_cu |
ed2dc618 SM |
2456 | = create_cu_from_index_list (dwarf2_per_objfile, section, is_dwz, |
2457 | sect_off, length); | |
b76e467d | 2458 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
9291a0cd | 2459 | } |
9291a0cd TT |
2460 | } |
2461 | ||
2ec9a5e0 | 2462 | /* Read the CU list from the mapped index, and use it to create all |
74a0d9f6 | 2463 | the CU objects for this objfile. */ |
2ec9a5e0 | 2464 | |
74a0d9f6 | 2465 | static void |
12359b5e | 2466 | create_cus_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2ec9a5e0 TT |
2467 | const gdb_byte *cu_list, offset_type cu_list_elements, |
2468 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2469 | { | |
b76e467d SM |
2470 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
2471 | dwarf2_per_objfile->all_comp_units.reserve | |
2472 | ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 2473 | |
12359b5e | 2474 | create_cus_from_index_list (dwarf2_per_objfile, cu_list, cu_list_elements, |
b76e467d | 2475 | &dwarf2_per_objfile->info, 0); |
2ec9a5e0 TT |
2476 | |
2477 | if (dwz_elements == 0) | |
74a0d9f6 | 2478 | return; |
2ec9a5e0 | 2479 | |
12359b5e SM |
2480 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
2481 | create_cus_from_index_list (dwarf2_per_objfile, dwz_list, dwz_elements, | |
b76e467d | 2482 | &dwz->info, 1); |
2ec9a5e0 TT |
2483 | } |
2484 | ||
1fd400ff | 2485 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2486 | |
74a0d9f6 | 2487 | static void |
12359b5e SM |
2488 | create_signatured_type_table_from_index |
2489 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
2490 | struct dwarf2_section_info *section, | |
2491 | const gdb_byte *bytes, | |
2492 | offset_type elements) | |
1fd400ff | 2493 | { |
12359b5e | 2494 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
1fd400ff | 2495 | |
b2bdb8cf SM |
2496 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2497 | dwarf2_per_objfile->all_type_units.reserve (elements / 3); | |
1fd400ff | 2498 | |
298e9637 | 2499 | htab_up sig_types_hash = allocate_signatured_type_table (); |
1fd400ff | 2500 | |
12359b5e | 2501 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 2502 | { |
52dc124a | 2503 | struct signatured_type *sig_type; |
9c541725 | 2504 | ULONGEST signature; |
1fd400ff | 2505 | void **slot; |
9c541725 | 2506 | cu_offset type_offset_in_tu; |
1fd400ff | 2507 | |
74a0d9f6 | 2508 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2509 | sect_offset sect_off |
2510 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2511 | type_offset_in_tu | |
2512 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
2513 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2514 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2515 | bytes += 3 * 8; | |
2516 | ||
52dc124a | 2517 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
1fd400ff | 2518 | struct signatured_type); |
52dc124a | 2519 | sig_type->signature = signature; |
9c541725 | 2520 | sig_type->type_offset_in_tu = type_offset_in_tu; |
3019eac3 | 2521 | sig_type->per_cu.is_debug_types = 1; |
8a0459fd | 2522 | sig_type->per_cu.section = section; |
9c541725 | 2523 | sig_type->per_cu.sect_off = sect_off; |
e3b94546 | 2524 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
52dc124a | 2525 | sig_type->per_cu.v.quick |
1fd400ff TT |
2526 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
2527 | struct dwarf2_per_cu_quick_data); | |
2528 | ||
b0b6a987 | 2529 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
52dc124a | 2530 | *slot = sig_type; |
1fd400ff | 2531 | |
b2bdb8cf | 2532 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
1fd400ff TT |
2533 | } |
2534 | ||
b0b6a987 | 2535 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
1fd400ff TT |
2536 | } |
2537 | ||
927aa2e7 JK |
2538 | /* Create the signatured type hash table from .debug_names. */ |
2539 | ||
2540 | static void | |
2541 | create_signatured_type_table_from_debug_names | |
ed2dc618 | 2542 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2543 | const mapped_debug_names &map, |
2544 | struct dwarf2_section_info *section, | |
2545 | struct dwarf2_section_info *abbrev_section) | |
2546 | { | |
ed2dc618 SM |
2547 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2548 | ||
96b79293 TT |
2549 | section->read (objfile); |
2550 | abbrev_section->read (objfile); | |
927aa2e7 | 2551 | |
b2bdb8cf SM |
2552 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
2553 | dwarf2_per_objfile->all_type_units.reserve (map.tu_count); | |
927aa2e7 | 2554 | |
298e9637 | 2555 | htab_up sig_types_hash = allocate_signatured_type_table (); |
927aa2e7 JK |
2556 | |
2557 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
2558 | { | |
2559 | struct signatured_type *sig_type; | |
927aa2e7 | 2560 | void **slot; |
927aa2e7 JK |
2561 | |
2562 | sect_offset sect_off | |
2563 | = (sect_offset) (extract_unsigned_integer | |
2564 | (map.tu_table_reordered + i * map.offset_size, | |
2565 | map.offset_size, | |
2566 | map.dwarf5_byte_order)); | |
2567 | ||
2568 | comp_unit_head cu_header; | |
ed2dc618 SM |
2569 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
2570 | abbrev_section, | |
927aa2e7 JK |
2571 | section->buffer + to_underlying (sect_off), |
2572 | rcuh_kind::TYPE); | |
2573 | ||
2574 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2575 | struct signatured_type); | |
2576 | sig_type->signature = cu_header.signature; | |
2577 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
2578 | sig_type->per_cu.is_debug_types = 1; | |
2579 | sig_type->per_cu.section = section; | |
2580 | sig_type->per_cu.sect_off = sect_off; | |
e3b94546 | 2581 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
927aa2e7 JK |
2582 | sig_type->per_cu.v.quick |
2583 | = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
2584 | struct dwarf2_per_cu_quick_data); | |
2585 | ||
b0b6a987 | 2586 | slot = htab_find_slot (sig_types_hash.get (), sig_type, INSERT); |
927aa2e7 JK |
2587 | *slot = sig_type; |
2588 | ||
b2bdb8cf | 2589 | dwarf2_per_objfile->all_type_units.push_back (sig_type); |
927aa2e7 JK |
2590 | } |
2591 | ||
b0b6a987 | 2592 | dwarf2_per_objfile->signatured_types = std::move (sig_types_hash); |
927aa2e7 JK |
2593 | } |
2594 | ||
9291a0cd TT |
2595 | /* Read the address map data from the mapped index, and use it to |
2596 | populate the objfile's psymtabs_addrmap. */ | |
2fdf6df6 | 2597 | |
9291a0cd | 2598 | static void |
ed2dc618 SM |
2599 | create_addrmap_from_index (struct dwarf2_per_objfile *dwarf2_per_objfile, |
2600 | struct mapped_index *index) | |
9291a0cd | 2601 | { |
ed2dc618 | 2602 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 2603 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9291a0cd | 2604 | const gdb_byte *iter, *end; |
9291a0cd | 2605 | struct addrmap *mutable_map; |
9291a0cd TT |
2606 | CORE_ADDR baseaddr; |
2607 | ||
8268c778 PA |
2608 | auto_obstack temp_obstack; |
2609 | ||
9291a0cd TT |
2610 | mutable_map = addrmap_create_mutable (&temp_obstack); |
2611 | ||
f00a2de2 PA |
2612 | iter = index->address_table.data (); |
2613 | end = iter + index->address_table.size (); | |
9291a0cd | 2614 | |
b3b3bada | 2615 | baseaddr = objfile->text_section_offset (); |
9291a0cd TT |
2616 | |
2617 | while (iter < end) | |
2618 | { | |
2619 | ULONGEST hi, lo, cu_index; | |
2620 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2621 | iter += 8; | |
2622 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2623 | iter += 8; | |
2624 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2625 | iter += 4; | |
f652bce2 | 2626 | |
24a55014 | 2627 | if (lo > hi) |
f652bce2 | 2628 | { |
b98664d3 | 2629 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 2630 | hex_string (lo), hex_string (hi)); |
24a55014 | 2631 | continue; |
f652bce2 | 2632 | } |
24a55014 | 2633 | |
b76e467d | 2634 | if (cu_index >= dwarf2_per_objfile->all_comp_units.size ()) |
f652bce2 | 2635 | { |
b98664d3 | 2636 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 2637 | (unsigned) cu_index); |
24a55014 | 2638 | continue; |
f652bce2 | 2639 | } |
24a55014 | 2640 | |
79748972 TT |
2641 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
2642 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 2643 | addrmap_set_empty (mutable_map, lo, hi - 1, |
ff4c9fec | 2644 | dwarf2_per_objfile->get_cu (cu_index)); |
9291a0cd TT |
2645 | } |
2646 | ||
d320c2b5 | 2647 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2648 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
9291a0cd TT |
2649 | } |
2650 | ||
927aa2e7 JK |
2651 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
2652 | populate the objfile's psymtabs_addrmap. */ | |
2653 | ||
2654 | static void | |
ed2dc618 | 2655 | create_addrmap_from_aranges (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
2656 | struct dwarf2_section_info *section) |
2657 | { | |
ed2dc618 | 2658 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
927aa2e7 JK |
2659 | bfd *abfd = objfile->obfd; |
2660 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
b3b3bada | 2661 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
927aa2e7 JK |
2662 | |
2663 | auto_obstack temp_obstack; | |
2664 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
2665 | ||
2666 | std::unordered_map<sect_offset, | |
2667 | dwarf2_per_cu_data *, | |
2668 | gdb::hash_enum<sect_offset>> | |
2669 | debug_info_offset_to_per_cu; | |
b76e467d | 2670 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 2671 | { |
927aa2e7 JK |
2672 | const auto insertpair |
2673 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, per_cu); | |
2674 | if (!insertpair.second) | |
2675 | { | |
2676 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
2677 | "debug_info_offset %s, ignoring .debug_aranges."), |
2678 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
2679 | return; |
2680 | } | |
2681 | } | |
2682 | ||
96b79293 | 2683 | section->read (objfile); |
927aa2e7 JK |
2684 | |
2685 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
2686 | ||
2687 | const gdb_byte *addr = section->buffer; | |
2688 | ||
2689 | while (addr < section->buffer + section->size) | |
2690 | { | |
2691 | const gdb_byte *const entry_addr = addr; | |
2692 | unsigned int bytes_read; | |
2693 | ||
2694 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
2695 | &bytes_read); | |
2696 | addr += bytes_read; | |
2697 | ||
2698 | const gdb_byte *const entry_end = addr + entry_length; | |
2699 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
2700 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
2701 | if (addr + entry_length > section->buffer + section->size) | |
2702 | { | |
47e3f474 | 2703 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2704 | "length %s exceeds section length %s, " |
2705 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2706 | objfile_name (objfile), |
2707 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2708 | plongest (bytes_read + entry_length), |
2709 | pulongest (section->size)); | |
2710 | return; | |
2711 | } | |
2712 | ||
2713 | /* The version number. */ | |
2714 | const uint16_t version = read_2_bytes (abfd, addr); | |
2715 | addr += 2; | |
2716 | if (version != 2) | |
2717 | { | |
47e3f474 | 2718 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2719 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
2720 | objfile_name (objfile), |
2721 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
2722 | return; |
2723 | } | |
2724 | ||
2725 | const uint64_t debug_info_offset | |
2726 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
2727 | addr += offset_size; | |
2728 | const auto per_cu_it | |
2729 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
2730 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
2731 | { | |
47e3f474 | 2732 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2733 | "debug_info_offset %s does not exists, " |
2734 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2735 | objfile_name (objfile), |
2736 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2737 | pulongest (debug_info_offset)); |
2738 | return; | |
2739 | } | |
2740 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
2741 | ||
2742 | const uint8_t address_size = *addr++; | |
2743 | if (address_size < 1 || address_size > 8) | |
2744 | { | |
47e3f474 | 2745 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2746 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
2747 | objfile_name (objfile), |
2748 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
2749 | return; |
2750 | } | |
2751 | ||
2752 | const uint8_t segment_selector_size = *addr++; | |
2753 | if (segment_selector_size != 0) | |
2754 | { | |
47e3f474 | 2755 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2756 | "segment_selector_size %u is not supported, " |
2757 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2758 | objfile_name (objfile), |
2759 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2760 | segment_selector_size); |
2761 | return; | |
2762 | } | |
2763 | ||
2764 | /* Must pad to an alignment boundary that is twice the address | |
2765 | size. It is undocumented by the DWARF standard but GCC does | |
2766 | use it. */ | |
2767 | for (size_t padding = ((-(addr - section->buffer)) | |
2768 | & (2 * address_size - 1)); | |
2769 | padding > 0; padding--) | |
2770 | if (*addr++ != 0) | |
2771 | { | |
47e3f474 | 2772 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2773 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
2774 | objfile_name (objfile), |
2775 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2776 | return; |
2777 | } | |
2778 | ||
2779 | for (;;) | |
2780 | { | |
2781 | if (addr + 2 * address_size > entry_end) | |
2782 | { | |
47e3f474 | 2783 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2784 | "address list is not properly terminated, " |
2785 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2786 | objfile_name (objfile), |
2787 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2788 | return; |
2789 | } | |
2790 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
2791 | dwarf5_byte_order); | |
2792 | addr += address_size; | |
2793 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
2794 | dwarf5_byte_order); | |
2795 | addr += address_size; | |
2796 | if (start == 0 && length == 0) | |
2797 | break; | |
2798 | if (start == 0 && !dwarf2_per_objfile->has_section_at_zero) | |
2799 | { | |
2800 | /* Symbol was eliminated due to a COMDAT group. */ | |
2801 | continue; | |
2802 | } | |
2803 | ULONGEST end = start + length; | |
79748972 TT |
2804 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
2805 | - baseaddr); | |
2806 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
2807 | - baseaddr); | |
927aa2e7 JK |
2808 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
2809 | } | |
2810 | } | |
2811 | ||
d320c2b5 | 2812 | objfile->partial_symtabs->psymtabs_addrmap |
5923a04c | 2813 | = addrmap_create_fixed (mutable_map, objfile->partial_symtabs->obstack ()); |
927aa2e7 JK |
2814 | } |
2815 | ||
9291a0cd TT |
2816 | /* Find a slot in the mapped index INDEX for the object named NAME. |
2817 | If NAME is found, set *VEC_OUT to point to the CU vector in the | |
109483d9 PA |
2818 | constant pool and return true. If NAME cannot be found, return |
2819 | false. */ | |
2fdf6df6 | 2820 | |
109483d9 | 2821 | static bool |
9291a0cd TT |
2822 | find_slot_in_mapped_hash (struct mapped_index *index, const char *name, |
2823 | offset_type **vec_out) | |
2824 | { | |
0cf03b49 | 2825 | offset_type hash; |
9291a0cd | 2826 | offset_type slot, step; |
559a7a62 | 2827 | int (*cmp) (const char *, const char *); |
9291a0cd | 2828 | |
791afaa2 | 2829 | gdb::unique_xmalloc_ptr<char> without_params; |
0cf03b49 | 2830 | if (current_language->la_language == language_cplus |
45280282 IB |
2831 | || current_language->la_language == language_fortran |
2832 | || current_language->la_language == language_d) | |
0cf03b49 JK |
2833 | { |
2834 | /* NAME is already canonical. Drop any qualifiers as .gdb_index does | |
2835 | not contain any. */ | |
a8719064 | 2836 | |
72998fb3 | 2837 | if (strchr (name, '(') != NULL) |
0cf03b49 | 2838 | { |
109483d9 | 2839 | without_params = cp_remove_params (name); |
0cf03b49 | 2840 | |
72998fb3 | 2841 | if (without_params != NULL) |
791afaa2 | 2842 | name = without_params.get (); |
0cf03b49 JK |
2843 | } |
2844 | } | |
2845 | ||
559a7a62 | 2846 | /* Index version 4 did not support case insensitive searches. But the |
feea76c2 | 2847 | indices for case insensitive languages are built in lowercase, therefore |
559a7a62 JK |
2848 | simulate our NAME being searched is also lowercased. */ |
2849 | hash = mapped_index_string_hash ((index->version == 4 | |
2850 | && case_sensitivity == case_sensitive_off | |
2851 | ? 5 : index->version), | |
2852 | name); | |
2853 | ||
f00a2de2 PA |
2854 | slot = hash & (index->symbol_table.size () - 1); |
2855 | step = ((hash * 17) & (index->symbol_table.size () - 1)) | 1; | |
559a7a62 | 2856 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); |
9291a0cd TT |
2857 | |
2858 | for (;;) | |
2859 | { | |
9291a0cd | 2860 | const char *str; |
f00a2de2 PA |
2861 | |
2862 | const auto &bucket = index->symbol_table[slot]; | |
2863 | if (bucket.name == 0 && bucket.vec == 0) | |
109483d9 | 2864 | return false; |
9291a0cd | 2865 | |
f00a2de2 | 2866 | str = index->constant_pool + MAYBE_SWAP (bucket.name); |
559a7a62 | 2867 | if (!cmp (name, str)) |
9291a0cd TT |
2868 | { |
2869 | *vec_out = (offset_type *) (index->constant_pool | |
f00a2de2 | 2870 | + MAYBE_SWAP (bucket.vec)); |
109483d9 | 2871 | return true; |
9291a0cd TT |
2872 | } |
2873 | ||
f00a2de2 | 2874 | slot = (slot + step) & (index->symbol_table.size () - 1); |
9291a0cd TT |
2875 | } |
2876 | } | |
2877 | ||
4485a1c1 SM |
2878 | /* A helper function that reads the .gdb_index from BUFFER and fills |
2879 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 2880 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
2881 | ok to use deprecated sections. |
2882 | ||
2883 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2884 | out parameters that are filled in with information about the CU and | |
2885 | TU lists in the section. | |
2886 | ||
4485a1c1 | 2887 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 2888 | |
d33bc52e | 2889 | static bool |
4485a1c1 SM |
2890 | read_gdb_index_from_buffer (struct objfile *objfile, |
2891 | const char *filename, | |
2892 | bool deprecated_ok, | |
2893 | gdb::array_view<const gdb_byte> buffer, | |
2894 | struct mapped_index *map, | |
2895 | const gdb_byte **cu_list, | |
2896 | offset_type *cu_list_elements, | |
2897 | const gdb_byte **types_list, | |
2898 | offset_type *types_list_elements) | |
2899 | { | |
2900 | const gdb_byte *addr = &buffer[0]; | |
82430852 | 2901 | |
9291a0cd | 2902 | /* Version check. */ |
4485a1c1 | 2903 | offset_type version = MAYBE_SWAP (*(offset_type *) addr); |
987d643c | 2904 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2905 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2906 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2907 | indices. */ |
831adc1f | 2908 | if (version < 4) |
481860b3 GB |
2909 | { |
2910 | static int warning_printed = 0; | |
2911 | if (!warning_printed) | |
2912 | { | |
2913 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2914 | filename); |
481860b3 GB |
2915 | warning_printed = 1; |
2916 | } | |
2917 | return 0; | |
2918 | } | |
2919 | /* Index version 4 uses a different hash function than index version | |
2920 | 5 and later. | |
2921 | ||
2922 | Versions earlier than 6 did not emit psymbols for inlined | |
2923 | functions. Using these files will cause GDB not to be able to | |
2924 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2925 | indices unless the user has done |
2926 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2927 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2928 | { |
2929 | static int warning_printed = 0; | |
2930 | if (!warning_printed) | |
2931 | { | |
e615022a DE |
2932 | warning (_("\ |
2933 | Skipping deprecated .gdb_index section in %s.\n\ | |
2934 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2935 | to use the section anyway."), | |
2ec9a5e0 | 2936 | filename); |
481860b3 GB |
2937 | warning_printed = 1; |
2938 | } | |
2939 | return 0; | |
2940 | } | |
796a7ff8 | 2941 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
2942 | of the TU (for symbols coming from TUs), |
2943 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
2944 | Plus gold-generated indices can have duplicate entries for global symbols, | |
2945 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
2946 | These are just performance bugs, and we can't distinguish gdb-generated | |
2947 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 2948 | |
481860b3 | 2949 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2950 | longer backward compatible. */ |
796a7ff8 | 2951 | if (version > 8) |
594e8718 | 2952 | return 0; |
9291a0cd | 2953 | |
559a7a62 | 2954 | map->version = version; |
9291a0cd | 2955 | |
4485a1c1 | 2956 | offset_type *metadata = (offset_type *) (addr + sizeof (offset_type)); |
1fd400ff | 2957 | |
4485a1c1 | 2958 | int i = 0; |
2ec9a5e0 TT |
2959 | *cu_list = addr + MAYBE_SWAP (metadata[i]); |
2960 | *cu_list_elements = ((MAYBE_SWAP (metadata[i + 1]) - MAYBE_SWAP (metadata[i])) | |
2961 | / 8); | |
1fd400ff TT |
2962 | ++i; |
2963 | ||
2ec9a5e0 TT |
2964 | *types_list = addr + MAYBE_SWAP (metadata[i]); |
2965 | *types_list_elements = ((MAYBE_SWAP (metadata[i + 1]) | |
2966 | - MAYBE_SWAP (metadata[i])) | |
2967 | / 8); | |
987d643c | 2968 | ++i; |
1fd400ff | 2969 | |
f00a2de2 PA |
2970 | const gdb_byte *address_table = addr + MAYBE_SWAP (metadata[i]); |
2971 | const gdb_byte *address_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2972 | map->address_table | |
2973 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
2974 | ++i; |
2975 | ||
f00a2de2 PA |
2976 | const gdb_byte *symbol_table = addr + MAYBE_SWAP (metadata[i]); |
2977 | const gdb_byte *symbol_table_end = addr + MAYBE_SWAP (metadata[i + 1]); | |
2978 | map->symbol_table | |
2979 | = gdb::array_view<mapped_index::symbol_table_slot> | |
2980 | ((mapped_index::symbol_table_slot *) symbol_table, | |
2981 | (mapped_index::symbol_table_slot *) symbol_table_end); | |
9291a0cd | 2982 | |
f00a2de2 | 2983 | ++i; |
f9d83a0b | 2984 | map->constant_pool = (char *) (addr + MAYBE_SWAP (metadata[i])); |
1fd400ff | 2985 | |
2ec9a5e0 TT |
2986 | return 1; |
2987 | } | |
2988 | ||
4485a1c1 SM |
2989 | /* Callback types for dwarf2_read_gdb_index. */ |
2990 | ||
2991 | typedef gdb::function_view | |
2992 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_objfile *)> | |
2993 | get_gdb_index_contents_ftype; | |
2994 | typedef gdb::function_view | |
2995 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
2996 | get_gdb_index_contents_dwz_ftype; | |
2997 | ||
927aa2e7 | 2998 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
2999 | elements of all the CUs and return 1. Otherwise, return 0. */ |
3000 | ||
3001 | static int | |
4485a1c1 SM |
3002 | dwarf2_read_gdb_index |
3003 | (struct dwarf2_per_objfile *dwarf2_per_objfile, | |
3004 | get_gdb_index_contents_ftype get_gdb_index_contents, | |
3005 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 3006 | { |
2ec9a5e0 TT |
3007 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
3008 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 3009 | struct dwz_file *dwz; |
12359b5e | 3010 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
2ec9a5e0 | 3011 | |
4485a1c1 SM |
3012 | gdb::array_view<const gdb_byte> main_index_contents |
3013 | = get_gdb_index_contents (objfile, dwarf2_per_objfile); | |
3014 | ||
3015 | if (main_index_contents.empty ()) | |
3016 | return 0; | |
3017 | ||
3063847f | 3018 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
4485a1c1 SM |
3019 | if (!read_gdb_index_from_buffer (objfile, objfile_name (objfile), |
3020 | use_deprecated_index_sections, | |
3021 | main_index_contents, map.get (), &cu_list, | |
3022 | &cu_list_elements, &types_list, | |
3023 | &types_list_elements)) | |
2ec9a5e0 TT |
3024 | return 0; |
3025 | ||
0fefef59 | 3026 | /* Don't use the index if it's empty. */ |
3063847f | 3027 | if (map->symbol_table.empty ()) |
0fefef59 DE |
3028 | return 0; |
3029 | ||
2ec9a5e0 TT |
3030 | /* If there is a .dwz file, read it so we can get its CU list as |
3031 | well. */ | |
ed2dc618 | 3032 | dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 3033 | if (dwz != NULL) |
2ec9a5e0 | 3034 | { |
2ec9a5e0 TT |
3035 | struct mapped_index dwz_map; |
3036 | const gdb_byte *dwz_types_ignore; | |
3037 | offset_type dwz_types_elements_ignore; | |
3038 | ||
4485a1c1 SM |
3039 | gdb::array_view<const gdb_byte> dwz_index_content |
3040 | = get_gdb_index_contents_dwz (objfile, dwz); | |
3041 | ||
3042 | if (dwz_index_content.empty ()) | |
3043 | return 0; | |
3044 | ||
3045 | if (!read_gdb_index_from_buffer (objfile, | |
00f93c44 AM |
3046 | bfd_get_filename (dwz->dwz_bfd.get ()), |
3047 | 1, dwz_index_content, &dwz_map, | |
4485a1c1 SM |
3048 | &dwz_list, &dwz_list_elements, |
3049 | &dwz_types_ignore, | |
3050 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
3051 | { |
3052 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 3053 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
3054 | return 0; |
3055 | } | |
3056 | } | |
3057 | ||
12359b5e SM |
3058 | create_cus_from_index (dwarf2_per_objfile, cu_list, cu_list_elements, |
3059 | dwz_list, dwz_list_elements); | |
1fd400ff | 3060 | |
8b70b953 TT |
3061 | if (types_list_elements) |
3062 | { | |
8b70b953 TT |
3063 | /* We can only handle a single .debug_types when we have an |
3064 | index. */ | |
fd5866f6 | 3065 | if (dwarf2_per_objfile->types.size () != 1) |
8b70b953 TT |
3066 | return 0; |
3067 | ||
fd5866f6 | 3068 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
8b70b953 | 3069 | |
12359b5e SM |
3070 | create_signatured_type_table_from_index (dwarf2_per_objfile, section, |
3071 | types_list, types_list_elements); | |
8b70b953 | 3072 | } |
9291a0cd | 3073 | |
3063847f | 3074 | create_addrmap_from_index (dwarf2_per_objfile, map.get ()); |
9291a0cd | 3075 | |
3063847f | 3076 | dwarf2_per_objfile->index_table = std::move (map); |
9291a0cd | 3077 | dwarf2_per_objfile->using_index = 1; |
7b9f3c50 | 3078 | dwarf2_per_objfile->quick_file_names_table = |
b76e467d | 3079 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
9291a0cd TT |
3080 | |
3081 | return 1; | |
3082 | } | |
3083 | ||
dee91e82 | 3084 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 3085 | |
dee91e82 DE |
3086 | static void |
3087 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
d521ce57 | 3088 | const gdb_byte *info_ptr, |
3e225074 | 3089 | struct die_info *comp_unit_die) |
9291a0cd | 3090 | { |
dee91e82 | 3091 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 3092 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
518817b3 SM |
3093 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3094 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 3095 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 3096 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 3097 | struct attribute *attr; |
7b9f3c50 DE |
3098 | void **slot; |
3099 | struct quick_file_names *qfn; | |
9291a0cd | 3100 | |
0186c6a7 DE |
3101 | gdb_assert (! this_cu->is_debug_types); |
3102 | ||
07261596 TT |
3103 | /* Our callers never want to match partial units -- instead they |
3104 | will match the enclosing full CU. */ | |
3105 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
3106 | { | |
3107 | this_cu->v.quick->no_file_data = 1; | |
3108 | return; | |
3109 | } | |
3110 | ||
0186c6a7 | 3111 | lh_cu = this_cu; |
7b9f3c50 | 3112 | slot = NULL; |
dee91e82 | 3113 | |
fff8551c | 3114 | line_header_up lh; |
9c541725 | 3115 | sect_offset line_offset {}; |
fff8551c | 3116 | |
dee91e82 | 3117 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
435d3d88 | 3118 | if (attr != nullptr) |
9291a0cd | 3119 | { |
7b9f3c50 DE |
3120 | struct quick_file_names find_entry; |
3121 | ||
9c541725 | 3122 | line_offset = (sect_offset) DW_UNSND (attr); |
7b9f3c50 DE |
3123 | |
3124 | /* We may have already read in this line header (TU line header sharing). | |
3125 | If we have we're done. */ | |
094b34ac | 3126 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3127 | find_entry.hash.line_sect_off = line_offset; |
5895093f | 3128 | slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 DE |
3129 | &find_entry, INSERT); |
3130 | if (*slot != NULL) | |
3131 | { | |
9a3c8263 | 3132 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 3133 | return; |
7b9f3c50 DE |
3134 | } |
3135 | ||
3019eac3 | 3136 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
3137 | } |
3138 | if (lh == NULL) | |
3139 | { | |
094b34ac | 3140 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 3141 | return; |
9291a0cd TT |
3142 | } |
3143 | ||
8d749320 | 3144 | qfn = XOBNEW (&objfile->objfile_obstack, struct quick_file_names); |
094b34ac | 3145 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 3146 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
3147 | gdb_assert (slot != NULL); |
3148 | *slot = qfn; | |
9291a0cd | 3149 | |
d721ba37 | 3150 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 3151 | |
aa391654 TT |
3152 | int offset = 0; |
3153 | if (strcmp (fnd.name, "<unknown>") != 0) | |
3154 | ++offset; | |
3155 | ||
7ba99d21 | 3156 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 3157 | qfn->file_names = |
aa391654 TT |
3158 | XOBNEWVEC (&objfile->objfile_obstack, const char *, qfn->num_file_names); |
3159 | if (offset != 0) | |
3160 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 3161 | for (int i = 0; i < lh->file_names_size (); ++i) |
03075812 TT |
3162 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
3163 | fnd.comp_dir).release (); | |
7b9f3c50 | 3164 | qfn->real_names = NULL; |
9291a0cd | 3165 | |
094b34ac | 3166 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
3167 | } |
3168 | ||
3169 | /* A helper for the "quick" functions which attempts to read the line | |
3170 | table for THIS_CU. */ | |
3171 | ||
3172 | static struct quick_file_names * | |
e4a48d9d | 3173 | dw2_get_file_names (struct dwarf2_per_cu_data *this_cu) |
dee91e82 | 3174 | { |
0186c6a7 DE |
3175 | /* This should never be called for TUs. */ |
3176 | gdb_assert (! this_cu->is_debug_types); | |
3177 | /* Nor type unit groups. */ | |
197400e8 | 3178 | gdb_assert (! this_cu->type_unit_group_p ()); |
f4dc4d17 | 3179 | |
dee91e82 DE |
3180 | if (this_cu->v.quick->file_names != NULL) |
3181 | return this_cu->v.quick->file_names; | |
3182 | /* If we know there is no line data, no point in looking again. */ | |
3183 | if (this_cu->v.quick->no_file_data) | |
3184 | return NULL; | |
3185 | ||
c0ab21c2 TT |
3186 | cutu_reader reader (this_cu); |
3187 | if (!reader.dummy_p) | |
3e225074 | 3188 | dw2_get_file_names_reader (&reader, reader.info_ptr, reader.comp_unit_die); |
dee91e82 DE |
3189 | |
3190 | if (this_cu->v.quick->no_file_data) | |
3191 | return NULL; | |
3192 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3193 | } |
3194 | ||
3195 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3196 | real path for a given file name from the line table. */ |
2fdf6df6 | 3197 | |
9291a0cd | 3198 | static const char * |
7b9f3c50 DE |
3199 | dw2_get_real_path (struct objfile *objfile, |
3200 | struct quick_file_names *qfn, int index) | |
9291a0cd | 3201 | { |
7b9f3c50 DE |
3202 | if (qfn->real_names == NULL) |
3203 | qfn->real_names = OBSTACK_CALLOC (&objfile->objfile_obstack, | |
26f2dc30 | 3204 | qfn->num_file_names, const char *); |
9291a0cd | 3205 | |
7b9f3c50 | 3206 | if (qfn->real_names[index] == NULL) |
14278e1f | 3207 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3208 | |
7b9f3c50 | 3209 | return qfn->real_names[index]; |
9291a0cd TT |
3210 | } |
3211 | ||
3212 | static struct symtab * | |
3213 | dw2_find_last_source_symtab (struct objfile *objfile) | |
3214 | { | |
ed2dc618 SM |
3215 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3216 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3217 | dwarf2_per_cu_data *dwarf_cu = dwarf2_per_objfile->all_comp_units.back (); |
58f0c718 | 3218 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, false); |
ae2de4f8 | 3219 | |
43f3e411 DE |
3220 | if (cust == NULL) |
3221 | return NULL; | |
ed2dc618 | 3222 | |
43f3e411 | 3223 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3224 | } |
3225 | ||
7b9f3c50 DE |
3226 | /* Traversal function for dw2_forget_cached_source_info. */ |
3227 | ||
3228 | static int | |
3229 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3230 | { |
7b9f3c50 | 3231 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3232 | |
7b9f3c50 | 3233 | if (file_data->real_names) |
9291a0cd | 3234 | { |
7b9f3c50 | 3235 | int i; |
9291a0cd | 3236 | |
7b9f3c50 | 3237 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3238 | { |
7b9f3c50 DE |
3239 | xfree ((void*) file_data->real_names[i]); |
3240 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3241 | } |
3242 | } | |
7b9f3c50 DE |
3243 | |
3244 | return 1; | |
3245 | } | |
3246 | ||
3247 | static void | |
3248 | dw2_forget_cached_source_info (struct objfile *objfile) | |
3249 | { | |
ed2dc618 SM |
3250 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3251 | = get_dwarf2_per_objfile (objfile); | |
7b9f3c50 | 3252 | |
5895093f | 3253 | htab_traverse_noresize (dwarf2_per_objfile->quick_file_names_table.get (), |
7b9f3c50 | 3254 | dw2_free_cached_file_names, NULL); |
9291a0cd TT |
3255 | } |
3256 | ||
f8eba3c6 TT |
3257 | /* Helper function for dw2_map_symtabs_matching_filename that expands |
3258 | the symtabs and calls the iterator. */ | |
3259 | ||
3260 | static int | |
3261 | dw2_map_expand_apply (struct objfile *objfile, | |
3262 | struct dwarf2_per_cu_data *per_cu, | |
f5b95b50 | 3263 | const char *name, const char *real_path, |
14bc53a8 | 3264 | gdb::function_view<bool (symtab *)> callback) |
f8eba3c6 | 3265 | { |
43f3e411 | 3266 | struct compunit_symtab *last_made = objfile->compunit_symtabs; |
f8eba3c6 TT |
3267 | |
3268 | /* Don't visit already-expanded CUs. */ | |
43f3e411 | 3269 | if (per_cu->v.quick->compunit_symtab) |
f8eba3c6 TT |
3270 | return 0; |
3271 | ||
3272 | /* This may expand more than one symtab, and we want to iterate over | |
3273 | all of them. */ | |
58f0c718 | 3274 | dw2_instantiate_symtab (per_cu, false); |
f8eba3c6 | 3275 | |
14bc53a8 PA |
3276 | return iterate_over_some_symtabs (name, real_path, objfile->compunit_symtabs, |
3277 | last_made, callback); | |
f8eba3c6 TT |
3278 | } |
3279 | ||
3280 | /* Implementation of the map_symtabs_matching_filename method. */ | |
3281 | ||
14bc53a8 PA |
3282 | static bool |
3283 | dw2_map_symtabs_matching_filename | |
3284 | (struct objfile *objfile, const char *name, const char *real_path, | |
3285 | gdb::function_view<bool (symtab *)> callback) | |
9291a0cd | 3286 | { |
c011a4f4 | 3287 | const char *name_basename = lbasename (name); |
ed2dc618 SM |
3288 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3289 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 3290 | |
848e3e78 DE |
3291 | /* The rule is CUs specify all the files, including those used by |
3292 | any TU, so there's no need to scan TUs here. */ | |
f4dc4d17 | 3293 | |
b76e467d | 3294 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3295 | { |
3d7bb9d9 | 3296 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3297 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3298 | continue; |
3299 | ||
b76e467d | 3300 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3301 | if (file_data == NULL) |
9291a0cd TT |
3302 | continue; |
3303 | ||
b76e467d | 3304 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3305 | { |
7b9f3c50 | 3306 | const char *this_name = file_data->file_names[j]; |
da235a7c | 3307 | const char *this_real_name; |
9291a0cd | 3308 | |
af529f8f | 3309 | if (compare_filenames_for_search (this_name, name)) |
9291a0cd | 3310 | { |
f5b95b50 | 3311 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3312 | callback)) |
3313 | return true; | |
288e77a7 | 3314 | continue; |
4aac40c8 | 3315 | } |
9291a0cd | 3316 | |
c011a4f4 DE |
3317 | /* Before we invoke realpath, which can get expensive when many |
3318 | files are involved, do a quick comparison of the basenames. */ | |
3319 | if (! basenames_may_differ | |
3320 | && FILENAME_CMP (lbasename (this_name), name_basename) != 0) | |
3321 | continue; | |
3322 | ||
da235a7c JK |
3323 | this_real_name = dw2_get_real_path (objfile, file_data, j); |
3324 | if (compare_filenames_for_search (this_real_name, name)) | |
9291a0cd | 3325 | { |
da235a7c | 3326 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3327 | callback)) |
3328 | return true; | |
288e77a7 | 3329 | continue; |
da235a7c | 3330 | } |
9291a0cd | 3331 | |
da235a7c JK |
3332 | if (real_path != NULL) |
3333 | { | |
af529f8f JK |
3334 | gdb_assert (IS_ABSOLUTE_PATH (real_path)); |
3335 | gdb_assert (IS_ABSOLUTE_PATH (name)); | |
7b9f3c50 | 3336 | if (this_real_name != NULL |
af529f8f | 3337 | && FILENAME_CMP (real_path, this_real_name) == 0) |
9291a0cd | 3338 | { |
f5b95b50 | 3339 | if (dw2_map_expand_apply (objfile, per_cu, name, real_path, |
14bc53a8 PA |
3340 | callback)) |
3341 | return true; | |
288e77a7 | 3342 | continue; |
9291a0cd TT |
3343 | } |
3344 | } | |
3345 | } | |
3346 | } | |
3347 | ||
14bc53a8 | 3348 | return false; |
9291a0cd TT |
3349 | } |
3350 | ||
da51c347 DE |
3351 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3352 | ||
3353 | struct dw2_symtab_iterator | |
9291a0cd | 3354 | { |
ed2dc618 SM |
3355 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
3356 | struct dwarf2_per_objfile *dwarf2_per_objfile; | |
2b79f376 SM |
3357 | /* If set, only look for symbols that match that block. Valid values are |
3358 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3359 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3360 | /* The kind of symbol we're looking for. */ |
3361 | domain_enum domain; | |
3362 | /* The list of CUs from the index entry of the symbol, | |
3363 | or NULL if not found. */ | |
3364 | offset_type *vec; | |
3365 | /* The next element in VEC to look at. */ | |
3366 | int next; | |
3367 | /* The number of elements in VEC, or zero if there is no match. */ | |
3368 | int length; | |
8943b874 DE |
3369 | /* Have we seen a global version of the symbol? |
3370 | If so we can ignore all further global instances. | |
3371 | This is to work around gold/15646, inefficient gold-generated | |
3372 | indices. */ | |
3373 | int global_seen; | |
da51c347 | 3374 | }; |
9291a0cd | 3375 | |
2b79f376 | 3376 | /* Initialize the index symtab iterator ITER. */ |
2fdf6df6 | 3377 | |
9291a0cd | 3378 | static void |
da51c347 | 3379 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
ed2dc618 | 3380 | struct dwarf2_per_objfile *dwarf2_per_objfile, |
c7f839cb | 3381 | gdb::optional<block_enum> block_index, |
da51c347 DE |
3382 | domain_enum domain, |
3383 | const char *name) | |
3384 | { | |
ed2dc618 | 3385 | iter->dwarf2_per_objfile = dwarf2_per_objfile; |
da51c347 DE |
3386 | iter->block_index = block_index; |
3387 | iter->domain = domain; | |
3388 | iter->next = 0; | |
8943b874 | 3389 | iter->global_seen = 0; |
da51c347 | 3390 | |
3063847f | 3391 | mapped_index *index = dwarf2_per_objfile->index_table.get (); |
ed2dc618 SM |
3392 | |
3393 | /* index is NULL if OBJF_READNOW. */ | |
3394 | if (index != NULL && find_slot_in_mapped_hash (index, name, &iter->vec)) | |
da51c347 DE |
3395 | iter->length = MAYBE_SWAP (*iter->vec); |
3396 | else | |
3397 | { | |
3398 | iter->vec = NULL; | |
3399 | iter->length = 0; | |
3400 | } | |
3401 | } | |
3402 | ||
3403 | /* Return the next matching CU or NULL if there are no more. */ | |
3404 | ||
3405 | static struct dwarf2_per_cu_data * | |
3406 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3407 | { | |
ed2dc618 SM |
3408 | struct dwarf2_per_objfile *dwarf2_per_objfile = iter->dwarf2_per_objfile; |
3409 | ||
da51c347 DE |
3410 | for ( ; iter->next < iter->length; ++iter->next) |
3411 | { | |
3412 | offset_type cu_index_and_attrs = | |
3413 | MAYBE_SWAP (iter->vec[iter->next + 1]); | |
3414 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
da51c347 DE |
3415 | gdb_index_symbol_kind symbol_kind = |
3416 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3417 | /* Only check the symbol attributes if they're present. | |
3418 | Indices prior to version 7 don't record them, | |
3419 | and indices >= 7 may elide them for certain symbols | |
3420 | (gold does this). */ | |
3421 | int attrs_valid = | |
ed2dc618 | 3422 | (dwarf2_per_objfile->index_table->version >= 7 |
da51c347 DE |
3423 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3424 | ||
3190f0c6 | 3425 | /* Don't crash on bad data. */ |
b76e467d | 3426 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3427 | + dwarf2_per_objfile->all_type_units.size ())) |
3190f0c6 | 3428 | { |
b98664d3 | 3429 | complaint (_(".gdb_index entry has bad CU index" |
4262abfb JK |
3430 | " [in module %s]"), |
3431 | objfile_name (dwarf2_per_objfile->objfile)); | |
3190f0c6 DE |
3432 | continue; |
3433 | } | |
3434 | ||
ff4c9fec | 3435 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
3190f0c6 | 3436 | |
da51c347 | 3437 | /* Skip if already read in. */ |
43f3e411 | 3438 | if (per_cu->v.quick->compunit_symtab) |
da51c347 DE |
3439 | continue; |
3440 | ||
8943b874 DE |
3441 | /* Check static vs global. */ |
3442 | if (attrs_valid) | |
3443 | { | |
2b79f376 SM |
3444 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3445 | ||
3446 | if (iter->block_index.has_value ()) | |
3447 | { | |
3448 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3449 | ||
3450 | if (is_static != want_static) | |
3451 | continue; | |
3452 | } | |
3453 | ||
8943b874 DE |
3454 | /* Work around gold/15646. */ |
3455 | if (!is_static && iter->global_seen) | |
3456 | continue; | |
3457 | if (!is_static) | |
3458 | iter->global_seen = 1; | |
3459 | } | |
da51c347 DE |
3460 | |
3461 | /* Only check the symbol's kind if it has one. */ | |
3462 | if (attrs_valid) | |
3463 | { | |
3464 | switch (iter->domain) | |
3465 | { | |
3466 | case VAR_DOMAIN: | |
3467 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3468 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3469 | /* Some types are also in VAR_DOMAIN. */ | |
3470 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3471 | continue; | |
3472 | break; | |
3473 | case STRUCT_DOMAIN: | |
3474 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3475 | continue; | |
3476 | break; | |
3477 | case LABEL_DOMAIN: | |
3478 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3479 | continue; | |
3480 | break; | |
59c35742 AB |
3481 | case MODULE_DOMAIN: |
3482 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3483 | continue; | |
3484 | break; | |
da51c347 DE |
3485 | default: |
3486 | break; | |
3487 | } | |
3488 | } | |
3489 | ||
3490 | ++iter->next; | |
3491 | return per_cu; | |
3492 | } | |
3493 | ||
3494 | return NULL; | |
3495 | } | |
3496 | ||
43f3e411 | 3497 | static struct compunit_symtab * |
c7f839cb | 3498 | dw2_lookup_symbol (struct objfile *objfile, block_enum block_index, |
da51c347 | 3499 | const char *name, domain_enum domain) |
9291a0cd | 3500 | { |
43f3e411 | 3501 | struct compunit_symtab *stab_best = NULL; |
ed2dc618 SM |
3502 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3503 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 3504 | |
b5ec771e PA |
3505 | lookup_name_info lookup_name (name, symbol_name_match_type::FULL); |
3506 | ||
ed2dc618 SM |
3507 | struct dw2_symtab_iterator iter; |
3508 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3509 | |
2b79f376 | 3510 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, block_index, domain, name); |
9291a0cd | 3511 | |
ed2dc618 SM |
3512 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
3513 | { | |
3514 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 3515 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
ed2dc618 | 3516 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 3517 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
da51c347 | 3518 | |
ed2dc618 SM |
3519 | sym = block_find_symbol (block, name, domain, |
3520 | block_find_non_opaque_type_preferred, | |
3521 | &with_opaque); | |
b2e2f908 | 3522 | |
ed2dc618 SM |
3523 | /* Some caution must be observed with overloaded functions |
3524 | and methods, since the index will not contain any overload | |
3525 | information (but NAME might contain it). */ | |
da51c347 | 3526 | |
ed2dc618 SM |
3527 | if (sym != NULL |
3528 | && SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name)) | |
3529 | return stab; | |
3530 | if (with_opaque != NULL | |
3531 | && SYMBOL_MATCHES_SEARCH_NAME (with_opaque, lookup_name)) | |
3532 | stab_best = stab; | |
da51c347 | 3533 | |
ed2dc618 | 3534 | /* Keep looking through other CUs. */ |
9291a0cd | 3535 | } |
9291a0cd | 3536 | |
da51c347 | 3537 | return stab_best; |
9291a0cd TT |
3538 | } |
3539 | ||
3540 | static void | |
3541 | dw2_print_stats (struct objfile *objfile) | |
3542 | { | |
ed2dc618 SM |
3543 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3544 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3545 | int total = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3546 | + dwarf2_per_objfile->all_type_units.size ()); |
ed2dc618 | 3547 | int count = 0; |
9291a0cd | 3548 | |
ed2dc618 | 3549 | for (int i = 0; i < total; ++i) |
9291a0cd | 3550 | { |
ff4c9fec | 3551 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3552 | |
43f3e411 | 3553 | if (!per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3554 | ++count; |
3555 | } | |
e4a48d9d | 3556 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3557 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3558 | } | |
3559 | ||
779bd270 DE |
3560 | /* This dumps minimal information about the index. |
3561 | It is called via "mt print objfiles". | |
3562 | One use is to verify .gdb_index has been loaded by the | |
3563 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3564 | ||
9291a0cd TT |
3565 | static void |
3566 | dw2_dump (struct objfile *objfile) | |
3567 | { | |
ed2dc618 SM |
3568 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3569 | = get_dwarf2_per_objfile (objfile); | |
3570 | ||
779bd270 DE |
3571 | gdb_assert (dwarf2_per_objfile->using_index); |
3572 | printf_filtered (".gdb_index:"); | |
3573 | if (dwarf2_per_objfile->index_table != NULL) | |
3574 | { | |
3575 | printf_filtered (" version %d\n", | |
3576 | dwarf2_per_objfile->index_table->version); | |
3577 | } | |
3578 | else | |
3579 | printf_filtered (" faked for \"readnow\"\n"); | |
3580 | printf_filtered ("\n"); | |
9291a0cd TT |
3581 | } |
3582 | ||
9291a0cd TT |
3583 | static void |
3584 | dw2_expand_symtabs_for_function (struct objfile *objfile, | |
3585 | const char *func_name) | |
3586 | { | |
ed2dc618 SM |
3587 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3588 | = get_dwarf2_per_objfile (objfile); | |
da51c347 | 3589 | |
ed2dc618 SM |
3590 | struct dw2_symtab_iterator iter; |
3591 | struct dwarf2_per_cu_data *per_cu; | |
da51c347 | 3592 | |
2b79f376 | 3593 | dw2_symtab_iter_init (&iter, dwarf2_per_objfile, {}, VAR_DOMAIN, func_name); |
da51c347 | 3594 | |
ed2dc618 | 3595 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
58f0c718 | 3596 | dw2_instantiate_symtab (per_cu, false); |
da51c347 | 3597 | |
9291a0cd TT |
3598 | } |
3599 | ||
3600 | static void | |
3601 | dw2_expand_all_symtabs (struct objfile *objfile) | |
3602 | { | |
ed2dc618 SM |
3603 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3604 | = get_dwarf2_per_objfile (objfile); | |
b76e467d | 3605 | int total_units = (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 3606 | + dwarf2_per_objfile->all_type_units.size ()); |
9291a0cd | 3607 | |
ed2dc618 | 3608 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 3609 | { |
ff4c9fec | 3610 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 3611 | |
58f0c718 TT |
3612 | /* We don't want to directly expand a partial CU, because if we |
3613 | read it with the wrong language, then assertion failures can | |
3614 | be triggered later on. See PR symtab/23010. So, tell | |
3615 | dw2_instantiate_symtab to skip partial CUs -- any important | |
3616 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
3617 | dw2_instantiate_symtab (per_cu, true); | |
9291a0cd TT |
3618 | } |
3619 | } | |
3620 | ||
3621 | static void | |
652a8996 JK |
3622 | dw2_expand_symtabs_with_fullname (struct objfile *objfile, |
3623 | const char *fullname) | |
9291a0cd | 3624 | { |
ed2dc618 SM |
3625 | struct dwarf2_per_objfile *dwarf2_per_objfile |
3626 | = get_dwarf2_per_objfile (objfile); | |
d4637a04 DE |
3627 | |
3628 | /* We don't need to consider type units here. | |
3629 | This is only called for examining code, e.g. expand_line_sal. | |
3630 | There can be an order of magnitude (or more) more type units | |
3631 | than comp units, and we avoid them if we can. */ | |
3632 | ||
b76e467d | 3633 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
9291a0cd | 3634 | { |
3d7bb9d9 | 3635 | /* We only need to look at symtabs not already expanded. */ |
43f3e411 | 3636 | if (per_cu->v.quick->compunit_symtab) |
9291a0cd TT |
3637 | continue; |
3638 | ||
b76e467d | 3639 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
7b9f3c50 | 3640 | if (file_data == NULL) |
9291a0cd TT |
3641 | continue; |
3642 | ||
b76e467d | 3643 | for (int j = 0; j < file_data->num_file_names; ++j) |
9291a0cd | 3644 | { |
652a8996 JK |
3645 | const char *this_fullname = file_data->file_names[j]; |
3646 | ||
3647 | if (filename_cmp (this_fullname, fullname) == 0) | |
9291a0cd | 3648 | { |
58f0c718 | 3649 | dw2_instantiate_symtab (per_cu, false); |
9291a0cd TT |
3650 | break; |
3651 | } | |
3652 | } | |
3653 | } | |
3654 | } | |
3655 | ||
9291a0cd | 3656 | static void |
199b4314 TT |
3657 | dw2_map_matching_symbols |
3658 | (struct objfile *objfile, | |
b054970d | 3659 | const lookup_name_info &name, domain_enum domain, |
199b4314 TT |
3660 | int global, |
3661 | gdb::function_view<symbol_found_callback_ftype> callback, | |
199b4314 | 3662 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 3663 | { |
40658b94 | 3664 | /* Currently unimplemented; used for Ada. The function can be called if the |
a9e6a4bb JK |
3665 | current language is Ada for a non-Ada objfile using GNU index. As Ada |
3666 | does not look for non-Ada symbols this function should just return. */ | |
9291a0cd TT |
3667 | } |
3668 | ||
e1ef7d7a PA |
3669 | /* Starting from a search name, return the string that finds the upper |
3670 | bound of all strings that start with SEARCH_NAME in a sorted name | |
3671 | list. Returns the empty string to indicate that the upper bound is | |
3672 | the end of the list. */ | |
3673 | ||
3674 | static std::string | |
3675 | make_sort_after_prefix_name (const char *search_name) | |
3676 | { | |
3677 | /* When looking to complete "func", we find the upper bound of all | |
3678 | symbols that start with "func" by looking for where we'd insert | |
3679 | the closest string that would follow "func" in lexicographical | |
3680 | order. Usually, that's "func"-with-last-character-incremented, | |
3681 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
3682 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
3683 | Especially mind the 0xff character, which is a valid character in | |
3684 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
3685 | rule out compilers allowing it in identifiers. Note that | |
3686 | conveniently, strcmp/strcasecmp are specified to compare | |
3687 | characters interpreted as unsigned char. So what we do is treat | |
3688 | the whole string as a base 256 number composed of a sequence of | |
3689 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
3690 | to 0, and carries 1 to the following more-significant position. | |
3691 | If the very first character in SEARCH_NAME ends up incremented | |
3692 | and carries/overflows, then the upper bound is the end of the | |
3693 | list. The string after the empty string is also the empty | |
3694 | string. | |
3695 | ||
3696 | Some examples of this operation: | |
3697 | ||
3698 | SEARCH_NAME => "+1" RESULT | |
3699 | ||
3700 | "abc" => "abd" | |
3701 | "ab\xff" => "ac" | |
3702 | "\xff" "a" "\xff" => "\xff" "b" | |
3703 | "\xff" => "" | |
3704 | "\xff\xff" => "" | |
3705 | "" => "" | |
3706 | ||
3707 | Then, with these symbols for example: | |
3708 | ||
3709 | func | |
3710 | func1 | |
3711 | fund | |
3712 | ||
3713 | completing "func" looks for symbols between "func" and | |
3714 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
3715 | which finds "func" and "func1", but not "fund". | |
3716 | ||
3717 | And with: | |
3718 | ||
3719 | funcÿ (Latin1 'ÿ' [0xff]) | |
3720 | funcÿ1 | |
3721 | fund | |
3722 | ||
3723 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
3724 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
3725 | ||
3726 | And with: | |
3727 | ||
3728 | ÿÿ (Latin1 'ÿ' [0xff]) | |
3729 | ÿÿ1 | |
3730 | ||
3731 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
3732 | the end of the list. | |
3733 | */ | |
3734 | std::string after = search_name; | |
3735 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
3736 | after.pop_back (); | |
3737 | if (!after.empty ()) | |
3738 | after.back () = (unsigned char) after.back () + 1; | |
3739 | return after; | |
3740 | } | |
3741 | ||
5c58de74 | 3742 | /* See declaration. */ |
61d96d7e | 3743 | |
5c58de74 PA |
3744 | std::pair<std::vector<name_component>::const_iterator, |
3745 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 3746 | mapped_index_base::find_name_components_bounds |
3b00ef10 | 3747 | (const lookup_name_info &lookup_name_without_params, language lang) const |
3f563c84 | 3748 | { |
5c58de74 PA |
3749 | auto *name_cmp |
3750 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 3751 | |
3b00ef10 TT |
3752 | const char *lang_name |
3753 | = lookup_name_without_params.language_lookup_name (lang).c_str (); | |
9291a0cd | 3754 | |
3f563c84 PA |
3755 | /* Comparison function object for lower_bound that matches against a |
3756 | given symbol name. */ | |
3757 | auto lookup_compare_lower = [&] (const name_component &elem, | |
3758 | const char *name) | |
3759 | { | |
5c58de74 | 3760 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3761 | const char *elem_name = elem_qualified + elem.name_offset; |
3762 | return name_cmp (elem_name, name) < 0; | |
3763 | }; | |
3764 | ||
3765 | /* Comparison function object for upper_bound that matches against a | |
3766 | given symbol name. */ | |
3767 | auto lookup_compare_upper = [&] (const char *name, | |
3768 | const name_component &elem) | |
3769 | { | |
5c58de74 | 3770 | const char *elem_qualified = this->symbol_name_at (elem.idx); |
3f563c84 PA |
3771 | const char *elem_name = elem_qualified + elem.name_offset; |
3772 | return name_cmp (name, elem_name) < 0; | |
3773 | }; | |
3774 | ||
5c58de74 PA |
3775 | auto begin = this->name_components.begin (); |
3776 | auto end = this->name_components.end (); | |
3f563c84 PA |
3777 | |
3778 | /* Find the lower bound. */ | |
3779 | auto lower = [&] () | |
3780 | { | |
3b00ef10 | 3781 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
3782 | return begin; |
3783 | else | |
3b00ef10 | 3784 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
3785 | } (); |
3786 | ||
3787 | /* Find the upper bound. */ | |
3788 | auto upper = [&] () | |
3789 | { | |
5c58de74 | 3790 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 3791 | { |
e1ef7d7a PA |
3792 | /* In completion mode, we want UPPER to point past all |
3793 | symbols names that have the same prefix. I.e., with | |
3794 | these symbols, and completing "func": | |
3795 | ||
3796 | function << lower bound | |
3797 | function1 | |
3798 | other_function << upper bound | |
3799 | ||
3800 | We find the upper bound by looking for the insertion | |
3801 | point of "func"-with-last-character-incremented, | |
3802 | i.e. "fund". */ | |
3b00ef10 | 3803 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 3804 | if (after.empty ()) |
3f563c84 | 3805 | return end; |
e6b2f5ef PA |
3806 | return std::lower_bound (lower, end, after.c_str (), |
3807 | lookup_compare_lower); | |
3f563c84 PA |
3808 | } |
3809 | else | |
3b00ef10 | 3810 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
3811 | } (); |
3812 | ||
5c58de74 PA |
3813 | return {lower, upper}; |
3814 | } | |
3815 | ||
3816 | /* See declaration. */ | |
3817 | ||
3818 | void | |
44ed8f3e | 3819 | mapped_index_base::build_name_components () |
5c58de74 PA |
3820 | { |
3821 | if (!this->name_components.empty ()) | |
3822 | return; | |
3823 | ||
3824 | this->name_components_casing = case_sensitivity; | |
3825 | auto *name_cmp | |
3826 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3827 | ||
3828 | /* The code below only knows how to break apart components of C++ | |
3829 | symbol names (and other languages that use '::' as | |
3b00ef10 | 3830 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
3831 | auto count = this->symbol_name_count (); |
3832 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 3833 | { |
44ed8f3e | 3834 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
3835 | continue; |
3836 | ||
3837 | const char *name = this->symbol_name_at (idx); | |
3838 | ||
3839 | /* Add each name component to the name component table. */ | |
3840 | unsigned int previous_len = 0; | |
3b00ef10 TT |
3841 | |
3842 | if (strstr (name, "::") != nullptr) | |
3843 | { | |
3844 | for (unsigned int current_len = cp_find_first_component (name); | |
3845 | name[current_len] != '\0'; | |
3846 | current_len += cp_find_first_component (name + current_len)) | |
3847 | { | |
3848 | gdb_assert (name[current_len] == ':'); | |
3849 | this->name_components.push_back ({previous_len, idx}); | |
3850 | /* Skip the '::'. */ | |
3851 | current_len += 2; | |
3852 | previous_len = current_len; | |
3853 | } | |
3854 | } | |
3855 | else | |
5c58de74 | 3856 | { |
3b00ef10 TT |
3857 | /* Handle the Ada encoded (aka mangled) form here. */ |
3858 | for (const char *iter = strstr (name, "__"); | |
3859 | iter != nullptr; | |
3860 | iter = strstr (iter, "__")) | |
3861 | { | |
3862 | this->name_components.push_back ({previous_len, idx}); | |
3863 | iter += 2; | |
3864 | previous_len = iter - name; | |
3865 | } | |
5c58de74 | 3866 | } |
3b00ef10 | 3867 | |
5c58de74 PA |
3868 | this->name_components.push_back ({previous_len, idx}); |
3869 | } | |
3870 | ||
3871 | /* Sort name_components elements by name. */ | |
3872 | auto name_comp_compare = [&] (const name_component &left, | |
3873 | const name_component &right) | |
3874 | { | |
3875 | const char *left_qualified = this->symbol_name_at (left.idx); | |
3876 | const char *right_qualified = this->symbol_name_at (right.idx); | |
3877 | ||
3878 | const char *left_name = left_qualified + left.name_offset; | |
3879 | const char *right_name = right_qualified + right.name_offset; | |
3880 | ||
3881 | return name_cmp (left_name, right_name) < 0; | |
3882 | }; | |
3883 | ||
3884 | std::sort (this->name_components.begin (), | |
3885 | this->name_components.end (), | |
3886 | name_comp_compare); | |
3887 | } | |
3888 | ||
3889 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
3890 | mapped_index_base instead of the containing objfile. This is split |
3891 | to a separate function in order to be able to unit test the | |
3892 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 3893 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 3894 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 PA |
3895 | |
3896 | static void | |
3897 | dw2_expand_symtabs_matching_symbol | |
44ed8f3e | 3898 | (mapped_index_base &index, |
5c58de74 PA |
3899 | const lookup_name_info &lookup_name_in, |
3900 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
3901 | enum search_domain kind, | |
3b00ef10 | 3902 | gdb::function_view<bool (offset_type)> match_callback) |
5c58de74 PA |
3903 | { |
3904 | lookup_name_info lookup_name_without_params | |
3905 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
3906 | |
3907 | /* Build the symbol name component sorted vector, if we haven't | |
3908 | yet. */ | |
3909 | index.build_name_components (); | |
3910 | ||
3f563c84 PA |
3911 | /* The same symbol may appear more than once in the range though. |
3912 | E.g., if we're looking for symbols that complete "w", and we have | |
3913 | a symbol named "w1::w2", we'll find the two name components for | |
3914 | that same symbol in the range. To be sure we only call the | |
3915 | callback once per symbol, we first collect the symbol name | |
3916 | indexes that matched in a temporary vector and ignore | |
3917 | duplicates. */ | |
3918 | std::vector<offset_type> matches; | |
3f563c84 | 3919 | |
3b00ef10 TT |
3920 | struct name_and_matcher |
3921 | { | |
3922 | symbol_name_matcher_ftype *matcher; | |
3923 | const std::string &name; | |
3924 | ||
3925 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 3926 | { |
3b00ef10 TT |
3927 | return matcher == other.matcher && name == other.name; |
3928 | } | |
3929 | }; | |
3930 | ||
3931 | /* A vector holding all the different symbol name matchers, for all | |
3932 | languages. */ | |
3933 | std::vector<name_and_matcher> matchers; | |
3934 | ||
3935 | for (int i = 0; i < nr_languages; i++) | |
3936 | { | |
3937 | enum language lang_e = (enum language) i; | |
3938 | ||
3939 | const language_defn *lang = language_def (lang_e); | |
3940 | symbol_name_matcher_ftype *name_matcher | |
3941 | = get_symbol_name_matcher (lang, lookup_name_without_params); | |
3f563c84 | 3942 | |
3b00ef10 TT |
3943 | name_and_matcher key { |
3944 | name_matcher, | |
3945 | lookup_name_without_params.language_lookup_name (lang_e) | |
3946 | }; | |
3947 | ||
3948 | /* Don't insert the same comparison routine more than once. | |
3949 | Note that we do this linear walk. This is not a problem in | |
3950 | practice because the number of supported languages is | |
3951 | low. */ | |
3952 | if (std::find (matchers.begin (), matchers.end (), key) | |
3953 | != matchers.end ()) | |
9291a0cd | 3954 | continue; |
3b00ef10 TT |
3955 | matchers.push_back (std::move (key)); |
3956 | ||
3957 | auto bounds | |
3958 | = index.find_name_components_bounds (lookup_name_without_params, | |
3959 | lang_e); | |
3960 | ||
3961 | /* Now for each symbol name in range, check to see if we have a name | |
3962 | match, and if so, call the MATCH_CALLBACK callback. */ | |
3963 | ||
3964 | for (; bounds.first != bounds.second; ++bounds.first) | |
3965 | { | |
3966 | const char *qualified = index.symbol_name_at (bounds.first->idx); | |
3967 | ||
3968 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
3969 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
3970 | continue; | |
9291a0cd | 3971 | |
3b00ef10 TT |
3972 | matches.push_back (bounds.first->idx); |
3973 | } | |
3f563c84 PA |
3974 | } |
3975 | ||
3976 | std::sort (matches.begin (), matches.end ()); | |
3977 | ||
3978 | /* Finally call the callback, once per match. */ | |
3979 | ULONGEST prev = -1; | |
3980 | for (offset_type idx : matches) | |
3981 | { | |
3982 | if (prev != idx) | |
3983 | { | |
3b00ef10 TT |
3984 | if (!match_callback (idx)) |
3985 | break; | |
3f563c84 PA |
3986 | prev = idx; |
3987 | } | |
3988 | } | |
3989 | ||
3990 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
3991 | (offset_type)-1 are both possible values. */ | |
3992 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
3993 | } | |
3994 | ||
c62446b1 PA |
3995 | #if GDB_SELF_TEST |
3996 | ||
3997 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
3998 | ||
a3c5fafd PA |
3999 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
4000 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
4001 | mapped_index_base interface. Builds an index from the symbol list | |
4002 | passed as parameter to the constructor. */ | |
4003 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
4004 | { |
4005 | public: | |
a3c5fafd PA |
4006 | mock_mapped_index (gdb::array_view<const char *> symbols) |
4007 | : m_symbol_table (symbols) | |
c62446b1 PA |
4008 | {} |
4009 | ||
a3c5fafd | 4010 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 4011 | |
a3c5fafd | 4012 | /* Return the number of names in the symbol table. */ |
632e107b | 4013 | size_t symbol_name_count () const override |
c62446b1 | 4014 | { |
a3c5fafd | 4015 | return m_symbol_table.size (); |
c62446b1 PA |
4016 | } |
4017 | ||
a3c5fafd | 4018 | /* Get the name of the symbol at IDX in the symbol table. */ |
632e107b | 4019 | const char *symbol_name_at (offset_type idx) const override |
a3c5fafd PA |
4020 | { |
4021 | return m_symbol_table[idx]; | |
4022 | } | |
c62446b1 | 4023 | |
a3c5fafd PA |
4024 | private: |
4025 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
4026 | }; |
4027 | ||
4028 | /* Convenience function that converts a NULL pointer to a "<null>" | |
4029 | string, to pass to print routines. */ | |
4030 | ||
4031 | static const char * | |
4032 | string_or_null (const char *str) | |
4033 | { | |
4034 | return str != NULL ? str : "<null>"; | |
4035 | } | |
4036 | ||
4037 | /* Check if a lookup_name_info built from | |
4038 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
4039 | index. EXPECTED_LIST is the list of expected matches, in expected | |
4040 | matching order. If no match expected, then an empty list is | |
4041 | specified. Returns true on success. On failure prints a warning | |
4042 | indicating the file:line that failed, and returns false. */ | |
4043 | ||
4044 | static bool | |
4045 | check_match (const char *file, int line, | |
4046 | mock_mapped_index &mock_index, | |
4047 | const char *name, symbol_name_match_type match_type, | |
4048 | bool completion_mode, | |
4049 | std::initializer_list<const char *> expected_list) | |
4050 | { | |
4051 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
4052 | ||
4053 | bool matched = true; | |
4054 | ||
4055 | auto mismatch = [&] (const char *expected_str, | |
4056 | const char *got) | |
4057 | { | |
4058 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
4059 | "expected=\"%s\", got=\"%s\"\n"), | |
4060 | file, line, | |
4061 | (match_type == symbol_name_match_type::FULL | |
4062 | ? "FULL" : "WILD"), | |
4063 | name, string_or_null (expected_str), string_or_null (got)); | |
4064 | matched = false; | |
4065 | }; | |
4066 | ||
4067 | auto expected_it = expected_list.begin (); | |
4068 | auto expected_end = expected_list.end (); | |
4069 | ||
a3c5fafd | 4070 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
c62446b1 PA |
4071 | NULL, ALL_DOMAIN, |
4072 | [&] (offset_type idx) | |
4073 | { | |
a3c5fafd | 4074 | const char *matched_name = mock_index.symbol_name_at (idx); |
c62446b1 PA |
4075 | const char *expected_str |
4076 | = expected_it == expected_end ? NULL : *expected_it++; | |
4077 | ||
4078 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
4079 | mismatch (expected_str, matched_name); | |
3b00ef10 | 4080 | return true; |
c62446b1 PA |
4081 | }); |
4082 | ||
4083 | const char *expected_str | |
4084 | = expected_it == expected_end ? NULL : *expected_it++; | |
4085 | if (expected_str != NULL) | |
4086 | mismatch (expected_str, NULL); | |
4087 | ||
4088 | return matched; | |
4089 | } | |
4090 | ||
4091 | /* The symbols added to the mock mapped_index for testing (in | |
4092 | canonical form). */ | |
4093 | static const char *test_symbols[] = { | |
4094 | "function", | |
4095 | "std::bar", | |
4096 | "std::zfunction", | |
4097 | "std::zfunction2", | |
4098 | "w1::w2", | |
4099 | "ns::foo<char*>", | |
4100 | "ns::foo<int>", | |
4101 | "ns::foo<long>", | |
a20714ff PA |
4102 | "ns2::tmpl<int>::foo2", |
4103 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 4104 | |
e1ef7d7a PA |
4105 | /* These are used to check that the increment-last-char in the |
4106 | matching algorithm for completion doesn't match "t1_fund" when | |
4107 | completing "t1_func". */ | |
4108 | "t1_func", | |
4109 | "t1_func1", | |
4110 | "t1_fund", | |
4111 | "t1_fund1", | |
4112 | ||
4113 | /* A UTF-8 name with multi-byte sequences to make sure that | |
4114 | cp-name-parser understands this as a single identifier ("função" | |
4115 | is "function" in PT). */ | |
4116 | u8"u8função", | |
4117 | ||
4118 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4119 | "yfunc\377", | |
4120 | ||
4121 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
4122 | "\377", | |
4123 | "\377\377123", | |
4124 | ||
c62446b1 PA |
4125 | /* A name with all sorts of complications. Starts with "z" to make |
4126 | it easier for the completion tests below. */ | |
4127 | #define Z_SYM_NAME \ | |
4128 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
4129 | "::tuple<(anonymous namespace)::ui*, " \ | |
4130 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
4131 | ||
4132 | Z_SYM_NAME | |
4133 | }; | |
4134 | ||
a3c5fafd PA |
4135 | /* Returns true if the mapped_index_base::find_name_component_bounds |
4136 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
4137 | in completion mode. */ | |
5c58de74 PA |
4138 | |
4139 | static bool | |
a3c5fafd | 4140 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 PA |
4141 | const char *search_name, |
4142 | gdb::array_view<const char *> expected_syms) | |
4143 | { | |
4144 | lookup_name_info lookup_name (search_name, | |
4145 | symbol_name_match_type::FULL, true); | |
4146 | ||
3b00ef10 TT |
4147 | auto bounds = index.find_name_components_bounds (lookup_name, |
4148 | language_cplus); | |
5c58de74 PA |
4149 | |
4150 | size_t distance = std::distance (bounds.first, bounds.second); | |
4151 | if (distance != expected_syms.size ()) | |
4152 | return false; | |
4153 | ||
4154 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
4155 | { | |
4156 | auto nc_elem = bounds.first + exp_elem; | |
4157 | const char *qualified = index.symbol_name_at (nc_elem->idx); | |
4158 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) | |
4159 | return false; | |
4160 | } | |
4161 | ||
4162 | return true; | |
4163 | } | |
4164 | ||
4165 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4166 | method. */ | |
4167 | ||
c62446b1 | 4168 | static void |
5c58de74 PA |
4169 | test_mapped_index_find_name_component_bounds () |
4170 | { | |
4171 | mock_mapped_index mock_index (test_symbols); | |
4172 | ||
a3c5fafd | 4173 | mock_index.build_name_components (); |
5c58de74 PA |
4174 | |
4175 | /* Test the lower-level mapped_index::find_name_component_bounds | |
4176 | method in completion mode. */ | |
4177 | { | |
4178 | static const char *expected_syms[] = { | |
4179 | "t1_func", | |
4180 | "t1_func1", | |
5c58de74 PA |
4181 | }; |
4182 | ||
a3c5fafd | 4183 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4184 | "t1_func", expected_syms)); |
4185 | } | |
4186 | ||
4187 | /* Check that the increment-last-char in the name matching algorithm | |
4188 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
4189 | { | |
4190 | static const char *expected_syms1[] = { | |
4191 | "\377", | |
4192 | "\377\377123", | |
4193 | }; | |
a3c5fafd | 4194 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4195 | "\377", expected_syms1)); |
4196 | ||
4197 | static const char *expected_syms2[] = { | |
4198 | "\377\377123", | |
4199 | }; | |
a3c5fafd | 4200 | SELF_CHECK (check_find_bounds_finds (mock_index, |
5c58de74 PA |
4201 | "\377\377", expected_syms2)); |
4202 | } | |
4203 | } | |
4204 | ||
4205 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
4206 | ||
4207 | static void | |
4208 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
4209 | { |
4210 | mock_mapped_index mock_index (test_symbols); | |
4211 | ||
4212 | /* We let all tests run until the end even if some fails, for debug | |
4213 | convenience. */ | |
4214 | bool any_mismatch = false; | |
4215 | ||
4216 | /* Create the expected symbols list (an initializer_list). Needed | |
4217 | because lists have commas, and we need to pass them to CHECK, | |
4218 | which is a macro. */ | |
4219 | #define EXPECT(...) { __VA_ARGS__ } | |
4220 | ||
4221 | /* Wrapper for check_match that passes down the current | |
4222 | __FILE__/__LINE__. */ | |
4223 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
4224 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
4225 | mock_index, \ | |
4226 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
4227 | EXPECTED_LIST) | |
4228 | ||
4229 | /* Identity checks. */ | |
4230 | for (const char *sym : test_symbols) | |
4231 | { | |
4232 | /* Should be able to match all existing symbols. */ | |
4233 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
4234 | EXPECT (sym)); | |
4235 | ||
4236 | /* Should be able to match all existing symbols with | |
4237 | parameters. */ | |
4238 | std::string with_params = std::string (sym) + "(int)"; | |
4239 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4240 | EXPECT (sym)); | |
4241 | ||
4242 | /* Should be able to match all existing symbols with | |
4243 | parameters and qualifiers. */ | |
4244 | with_params = std::string (sym) + " ( int ) const"; | |
4245 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4246 | EXPECT (sym)); | |
4247 | ||
4248 | /* This should really find sym, but cp-name-parser.y doesn't | |
4249 | know about lvalue/rvalue qualifiers yet. */ | |
4250 | with_params = std::string (sym) + " ( int ) &&"; | |
4251 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
4252 | {}); | |
4253 | } | |
4254 | ||
e1ef7d7a PA |
4255 | /* Check that the name matching algorithm for completion doesn't get |
4256 | confused with Latin1 'ÿ' / 0xff. */ | |
4257 | { | |
4258 | static const char str[] = "\377"; | |
4259 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4260 | EXPECT ("\377", "\377\377123")); | |
4261 | } | |
4262 | ||
4263 | /* Check that the increment-last-char in the matching algorithm for | |
4264 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
4265 | { | |
4266 | static const char str[] = "t1_func"; | |
4267 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
4268 | EXPECT ("t1_func", "t1_func1")); | |
4269 | } | |
4270 | ||
c62446b1 PA |
4271 | /* Check that completion mode works at each prefix of the expected |
4272 | symbol name. */ | |
4273 | { | |
4274 | static const char str[] = "function(int)"; | |
4275 | size_t len = strlen (str); | |
4276 | std::string lookup; | |
4277 | ||
4278 | for (size_t i = 1; i < len; i++) | |
4279 | { | |
4280 | lookup.assign (str, i); | |
4281 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4282 | EXPECT ("function")); | |
4283 | } | |
4284 | } | |
4285 | ||
4286 | /* While "w" is a prefix of both components, the match function | |
4287 | should still only be called once. */ | |
4288 | { | |
4289 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
4290 | EXPECT ("w1::w2")); | |
a20714ff PA |
4291 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
4292 | EXPECT ("w1::w2")); | |
c62446b1 PA |
4293 | } |
4294 | ||
4295 | /* Same, with a "complicated" symbol. */ | |
4296 | { | |
4297 | static const char str[] = Z_SYM_NAME; | |
4298 | size_t len = strlen (str); | |
4299 | std::string lookup; | |
4300 | ||
4301 | for (size_t i = 1; i < len; i++) | |
4302 | { | |
4303 | lookup.assign (str, i); | |
4304 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
4305 | EXPECT (Z_SYM_NAME)); | |
4306 | } | |
4307 | } | |
4308 | ||
4309 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
4310 | { | |
4311 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
4312 | {}); | |
4313 | } | |
4314 | ||
4315 | /* A complete symbol with parameters matches any overload, since the | |
4316 | index has no overload info. */ | |
4317 | { | |
4318 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4319 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4320 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4321 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4322 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4323 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4324 | } |
4325 | ||
4326 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4327 | template argument list. */ | |
4328 | { | |
4329 | static const char expected[] = "ns::foo<int>"; | |
4330 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4331 | EXPECT (expected)); | |
a20714ff PA |
4332 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4333 | EXPECT (expected)); | |
c62446b1 PA |
4334 | } |
4335 | ||
4336 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4337 | template argument list that includes a pointer. */ | |
4338 | { | |
4339 | static const char expected[] = "ns::foo<char*>"; | |
4340 | /* Try both completion and non-completion modes. */ | |
4341 | static const bool completion_mode[2] = {false, true}; | |
4342 | for (size_t i = 0; i < 2; i++) | |
4343 | { | |
4344 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4345 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4346 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4347 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4348 | |
4349 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4350 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4351 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4352 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4353 | } |
4354 | } | |
4355 | ||
4356 | { | |
4357 | /* Check method qualifiers are ignored. */ | |
4358 | static const char expected[] = "ns::foo<char*>"; | |
4359 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4360 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4361 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4362 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4363 | CHECK_MATCH ("foo < char * > ( int ) const", |
4364 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4365 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4366 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4367 | } |
4368 | ||
4369 | /* Test lookup names that don't match anything. */ | |
4370 | { | |
a20714ff PA |
4371 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4372 | {}); | |
4373 | ||
c62446b1 PA |
4374 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4375 | {}); | |
4376 | } | |
4377 | ||
a20714ff PA |
4378 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4379 | which should not be confused with a parameter list. */ | |
4380 | { | |
4381 | static const char *syms[] = { | |
4382 | "A::B::C", | |
4383 | "B::C", | |
4384 | "C", | |
4385 | "A :: B :: C ( int )", | |
4386 | "B :: C ( int )", | |
4387 | "C ( int )", | |
4388 | }; | |
4389 | ||
4390 | for (const char *s : syms) | |
4391 | { | |
4392 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4393 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4394 | } | |
4395 | } | |
4396 | ||
4397 | { | |
4398 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4399 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4400 | EXPECT (expected)); | |
4401 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4402 | EXPECT (expected)); | |
4403 | } | |
4404 | ||
c62446b1 PA |
4405 | SELF_CHECK (!any_mismatch); |
4406 | ||
4407 | #undef EXPECT | |
4408 | #undef CHECK_MATCH | |
4409 | } | |
4410 | ||
5c58de74 PA |
4411 | static void |
4412 | run_test () | |
4413 | { | |
4414 | test_mapped_index_find_name_component_bounds (); | |
4415 | test_dw2_expand_symtabs_matching_symbol (); | |
4416 | } | |
4417 | ||
c62446b1 PA |
4418 | }} // namespace selftests::dw2_expand_symtabs_matching |
4419 | ||
4420 | #endif /* GDB_SELF_TEST */ | |
4421 | ||
4b514bc8 JK |
4422 | /* If FILE_MATCHER is NULL or if PER_CU has |
4423 | dwarf2_per_cu_quick_data::MARK set (see | |
4424 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4425 | EXPANSION_NOTIFY on it. */ | |
4426 | ||
4427 | static void | |
4428 | dw2_expand_symtabs_matching_one | |
4429 | (struct dwarf2_per_cu_data *per_cu, | |
4430 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4431 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4432 | { | |
4433 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4434 | { | |
4435 | bool symtab_was_null | |
4436 | = (per_cu->v.quick->compunit_symtab == NULL); | |
4437 | ||
58f0c718 | 4438 | dw2_instantiate_symtab (per_cu, false); |
4b514bc8 JK |
4439 | |
4440 | if (expansion_notify != NULL | |
4441 | && symtab_was_null | |
4442 | && per_cu->v.quick->compunit_symtab != NULL) | |
4443 | expansion_notify (per_cu->v.quick->compunit_symtab); | |
4444 | } | |
4445 | } | |
4446 | ||
3f563c84 PA |
4447 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4448 | matched, to expand corresponding CUs that were marked. IDX is the | |
4449 | index of the symbol name that matched. */ | |
4450 | ||
4451 | static void | |
4452 | dw2_expand_marked_cus | |
ed2dc618 | 4453 | (struct dwarf2_per_objfile *dwarf2_per_objfile, offset_type idx, |
3f563c84 PA |
4454 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4455 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4456 | search_domain kind) | |
4457 | { | |
3f563c84 PA |
4458 | offset_type *vec, vec_len, vec_idx; |
4459 | bool global_seen = false; | |
ed2dc618 | 4460 | mapped_index &index = *dwarf2_per_objfile->index_table; |
3f563c84 | 4461 | |
61920122 | 4462 | vec = (offset_type *) (index.constant_pool |
f00a2de2 | 4463 | + MAYBE_SWAP (index.symbol_table[idx].vec)); |
61920122 PA |
4464 | vec_len = MAYBE_SWAP (vec[0]); |
4465 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) | |
4466 | { | |
61920122 PA |
4467 | offset_type cu_index_and_attrs = MAYBE_SWAP (vec[vec_idx + 1]); |
4468 | /* This value is only valid for index versions >= 7. */ | |
4469 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4470 | gdb_index_symbol_kind symbol_kind = | |
4471 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4472 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4473 | /* Only check the symbol attributes if they're present. | |
4474 | Indices prior to version 7 don't record them, | |
4475 | and indices >= 7 may elide them for certain symbols | |
4476 | (gold does this). */ | |
4477 | int attrs_valid = | |
4478 | (index.version >= 7 | |
4479 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4480 | ||
4481 | /* Work around gold/15646. */ | |
4482 | if (attrs_valid) | |
9291a0cd | 4483 | { |
61920122 PA |
4484 | if (!is_static && global_seen) |
4485 | continue; | |
4486 | if (!is_static) | |
4487 | global_seen = true; | |
4488 | } | |
3190f0c6 | 4489 | |
61920122 PA |
4490 | /* Only check the symbol's kind if it has one. */ |
4491 | if (attrs_valid) | |
4492 | { | |
4493 | switch (kind) | |
8943b874 | 4494 | { |
61920122 PA |
4495 | case VARIABLES_DOMAIN: |
4496 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4497 | continue; | |
4498 | break; | |
4499 | case FUNCTIONS_DOMAIN: | |
4500 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4501 | continue; |
61920122 PA |
4502 | break; |
4503 | case TYPES_DOMAIN: | |
4504 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4505 | continue; | |
4506 | break; | |
59c35742 AB |
4507 | case MODULES_DOMAIN: |
4508 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4509 | continue; | |
4510 | break; | |
61920122 PA |
4511 | default: |
4512 | break; | |
8943b874 | 4513 | } |
61920122 | 4514 | } |
8943b874 | 4515 | |
61920122 | 4516 | /* Don't crash on bad data. */ |
b76e467d | 4517 | if (cu_index >= (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 4518 | + dwarf2_per_objfile->all_type_units.size ())) |
61920122 | 4519 | { |
b98664d3 | 4520 | complaint (_(".gdb_index entry has bad CU index" |
ed2dc618 SM |
4521 | " [in module %s]"), |
4522 | objfile_name (dwarf2_per_objfile->objfile)); | |
61920122 PA |
4523 | continue; |
4524 | } | |
4525 | ||
ff4c9fec | 4526 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (cu_index); |
4b514bc8 JK |
4527 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, |
4528 | expansion_notify); | |
61920122 PA |
4529 | } |
4530 | } | |
4531 | ||
4b514bc8 JK |
4532 | /* If FILE_MATCHER is non-NULL, set all the |
4533 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
4534 | that match FILE_MATCHER. */ | |
4535 | ||
61920122 | 4536 | static void |
4b514bc8 | 4537 | dw_expand_symtabs_matching_file_matcher |
ed2dc618 SM |
4538 | (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4539 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) | |
61920122 | 4540 | { |
4b514bc8 | 4541 | if (file_matcher == NULL) |
61920122 PA |
4542 | return; |
4543 | ||
4b514bc8 JK |
4544 | objfile *const objfile = dwarf2_per_objfile->objfile; |
4545 | ||
4546 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, | |
4547 | htab_eq_pointer, | |
4548 | NULL, xcalloc, xfree)); | |
4549 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
4550 | htab_eq_pointer, |
4551 | NULL, xcalloc, xfree)); | |
61920122 | 4552 | |
4b514bc8 JK |
4553 | /* The rule is CUs specify all the files, including those used by |
4554 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 4555 | |
b76e467d | 4556 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4557 | { |
927aa2e7 JK |
4558 | QUIT; |
4559 | ||
4560 | per_cu->v.quick->mark = 0; | |
4561 | ||
4562 | /* We only need to look at symtabs not already expanded. */ | |
4563 | if (per_cu->v.quick->compunit_symtab) | |
4564 | continue; | |
4565 | ||
b76e467d | 4566 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4567 | if (file_data == NULL) |
4568 | continue; | |
4569 | ||
4570 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4571 | continue; | |
4572 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
4573 | { | |
4574 | per_cu->v.quick->mark = 1; | |
4575 | continue; | |
4576 | } | |
4577 | ||
b76e467d | 4578 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
4579 | { |
4580 | const char *this_real_name; | |
4581 | ||
4582 | if (file_matcher (file_data->file_names[j], false)) | |
4583 | { | |
4584 | per_cu->v.quick->mark = 1; | |
4585 | break; | |
4586 | } | |
4587 | ||
4588 | /* Before we invoke realpath, which can get expensive when many | |
4589 | files are involved, do a quick comparison of the basenames. */ | |
4590 | if (!basenames_may_differ | |
4591 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4592 | true)) | |
4593 | continue; | |
4594 | ||
4595 | this_real_name = dw2_get_real_path (objfile, file_data, j); | |
4596 | if (file_matcher (this_real_name, false)) | |
4597 | { | |
4598 | per_cu->v.quick->mark = 1; | |
4599 | break; | |
4600 | } | |
4601 | } | |
4602 | ||
b76e467d SM |
4603 | void **slot = htab_find_slot (per_cu->v.quick->mark |
4604 | ? visited_found.get () | |
4605 | : visited_not_found.get (), | |
4606 | file_data, INSERT); | |
927aa2e7 JK |
4607 | *slot = file_data; |
4608 | } | |
4609 | } | |
4610 | ||
4611 | static void | |
4612 | dw2_expand_symtabs_matching | |
4613 | (struct objfile *objfile, | |
4614 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4615 | const lookup_name_info &lookup_name, | |
4616 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4617 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
4618 | enum search_domain kind) | |
4619 | { | |
ed2dc618 SM |
4620 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4621 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4622 | |
4623 | /* index_table is NULL if OBJF_READNOW. */ | |
4624 | if (!dwarf2_per_objfile->index_table) | |
4625 | return; | |
4626 | ||
ed2dc618 | 4627 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
927aa2e7 JK |
4628 | |
4629 | mapped_index &index = *dwarf2_per_objfile->index_table; | |
4630 | ||
4631 | dw2_expand_symtabs_matching_symbol (index, lookup_name, | |
4632 | symbol_matcher, | |
4633 | kind, [&] (offset_type idx) | |
4634 | { | |
ed2dc618 | 4635 | dw2_expand_marked_cus (dwarf2_per_objfile, idx, file_matcher, |
927aa2e7 | 4636 | expansion_notify, kind); |
3b00ef10 | 4637 | return true; |
927aa2e7 JK |
4638 | }); |
4639 | } | |
4640 | ||
4641 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
4642 | symtab. */ | |
4643 | ||
4644 | static struct compunit_symtab * | |
4645 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4646 | CORE_ADDR pc) | |
4647 | { | |
4648 | int i; | |
4649 | ||
4650 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
4651 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4652 | return cust; | |
4653 | ||
4654 | if (cust->includes == NULL) | |
4655 | return NULL; | |
4656 | ||
4657 | for (i = 0; cust->includes[i]; ++i) | |
4658 | { | |
4659 | struct compunit_symtab *s = cust->includes[i]; | |
4660 | ||
4661 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
4662 | if (s != NULL) | |
4663 | return s; | |
4664 | } | |
4665 | ||
4666 | return NULL; | |
4667 | } | |
4668 | ||
4669 | static struct compunit_symtab * | |
4670 | dw2_find_pc_sect_compunit_symtab (struct objfile *objfile, | |
4671 | struct bound_minimal_symbol msymbol, | |
4672 | CORE_ADDR pc, | |
4673 | struct obj_section *section, | |
4674 | int warn_if_readin) | |
4675 | { | |
4676 | struct dwarf2_per_cu_data *data; | |
4677 | struct compunit_symtab *result; | |
4678 | ||
d320c2b5 | 4679 | if (!objfile->partial_symtabs->psymtabs_addrmap) |
927aa2e7 JK |
4680 | return NULL; |
4681 | ||
b3b3bada | 4682 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
d320c2b5 TT |
4683 | data = (struct dwarf2_per_cu_data *) addrmap_find |
4684 | (objfile->partial_symtabs->psymtabs_addrmap, pc - baseaddr); | |
927aa2e7 JK |
4685 | if (!data) |
4686 | return NULL; | |
4687 | ||
4688 | if (warn_if_readin && data->v.quick->compunit_symtab) | |
4689 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), | |
4690 | paddress (get_objfile_arch (objfile), pc)); | |
4691 | ||
4692 | result | |
58f0c718 TT |
4693 | = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data, |
4694 | false), | |
927aa2e7 JK |
4695 | pc); |
4696 | gdb_assert (result != NULL); | |
4697 | return result; | |
4698 | } | |
4699 | ||
4700 | static void | |
4701 | dw2_map_symbol_filenames (struct objfile *objfile, symbol_filename_ftype *fun, | |
4702 | void *data, int need_fullname) | |
4703 | { | |
ed2dc618 SM |
4704 | struct dwarf2_per_objfile *dwarf2_per_objfile |
4705 | = get_dwarf2_per_objfile (objfile); | |
927aa2e7 JK |
4706 | |
4707 | if (!dwarf2_per_objfile->filenames_cache) | |
4708 | { | |
4709 | dwarf2_per_objfile->filenames_cache.emplace (); | |
4710 | ||
4711 | htab_up visited (htab_create_alloc (10, | |
4712 | htab_hash_pointer, htab_eq_pointer, | |
4713 | NULL, xcalloc, xfree)); | |
4714 | ||
4715 | /* The rule is CUs specify all the files, including those used | |
4716 | by any TU, so there's no need to scan TUs here. We can | |
4717 | ignore file names coming from already-expanded CUs. */ | |
4718 | ||
b76e467d | 4719 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4720 | { |
927aa2e7 JK |
4721 | if (per_cu->v.quick->compunit_symtab) |
4722 | { | |
4723 | void **slot = htab_find_slot (visited.get (), | |
4724 | per_cu->v.quick->file_names, | |
4725 | INSERT); | |
4726 | ||
4727 | *slot = per_cu->v.quick->file_names; | |
4728 | } | |
4729 | } | |
4730 | ||
b76e467d | 4731 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
927aa2e7 | 4732 | { |
927aa2e7 JK |
4733 | /* We only need to look at symtabs not already expanded. */ |
4734 | if (per_cu->v.quick->compunit_symtab) | |
4735 | continue; | |
4736 | ||
b76e467d | 4737 | quick_file_names *file_data = dw2_get_file_names (per_cu); |
927aa2e7 JK |
4738 | if (file_data == NULL) |
4739 | continue; | |
4740 | ||
b76e467d | 4741 | void **slot = htab_find_slot (visited.get (), file_data, INSERT); |
927aa2e7 JK |
4742 | if (*slot) |
4743 | { | |
4744 | /* Already visited. */ | |
4745 | continue; | |
4746 | } | |
4747 | *slot = file_data; | |
4748 | ||
4749 | for (int j = 0; j < file_data->num_file_names; ++j) | |
4750 | { | |
4751 | const char *filename = file_data->file_names[j]; | |
4752 | dwarf2_per_objfile->filenames_cache->seen (filename); | |
4753 | } | |
4754 | } | |
4755 | } | |
4756 | ||
4757 | dwarf2_per_objfile->filenames_cache->traverse ([&] (const char *filename) | |
4758 | { | |
4759 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
4760 | ||
4761 | if (need_fullname) | |
4762 | this_real_name = gdb_realpath (filename); | |
4763 | (*fun) (filename, this_real_name.get (), data); | |
4764 | }); | |
4765 | } | |
4766 | ||
4767 | static int | |
4768 | dw2_has_symbols (struct objfile *objfile) | |
4769 | { | |
4770 | return 1; | |
4771 | } | |
4772 | ||
4773 | const struct quick_symbol_functions dwarf2_gdb_index_functions = | |
4774 | { | |
4775 | dw2_has_symbols, | |
4776 | dw2_find_last_source_symtab, | |
4777 | dw2_forget_cached_source_info, | |
4778 | dw2_map_symtabs_matching_filename, | |
4779 | dw2_lookup_symbol, | |
4780 | dw2_print_stats, | |
4781 | dw2_dump, | |
927aa2e7 JK |
4782 | dw2_expand_symtabs_for_function, |
4783 | dw2_expand_all_symtabs, | |
4784 | dw2_expand_symtabs_with_fullname, | |
4785 | dw2_map_matching_symbols, | |
4786 | dw2_expand_symtabs_matching, | |
4787 | dw2_find_pc_sect_compunit_symtab, | |
4788 | NULL, | |
4789 | dw2_map_symbol_filenames | |
4790 | }; | |
4791 | ||
4792 | /* DWARF-5 debug_names reader. */ | |
4793 | ||
4794 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
4795 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
4796 | ||
4797 | /* A helper function that reads the .debug_names section in SECTION | |
4798 | and fills in MAP. FILENAME is the name of the file containing the | |
4799 | section; it is used for error reporting. | |
4800 | ||
4801 | Returns true if all went well, false otherwise. */ | |
4802 | ||
4803 | static bool | |
4804 | read_debug_names_from_section (struct objfile *objfile, | |
4805 | const char *filename, | |
4806 | struct dwarf2_section_info *section, | |
4807 | mapped_debug_names &map) | |
4808 | { | |
96b79293 | 4809 | if (section->empty ()) |
927aa2e7 JK |
4810 | return false; |
4811 | ||
4812 | /* Older elfutils strip versions could keep the section in the main | |
4813 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 4814 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
927aa2e7 JK |
4815 | return false; |
4816 | ||
96b79293 | 4817 | section->read (objfile); |
927aa2e7 JK |
4818 | |
4819 | map.dwarf5_byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
4820 | ||
4821 | const gdb_byte *addr = section->buffer; | |
4822 | ||
96b79293 | 4823 | bfd *const abfd = section->get_bfd_owner (); |
927aa2e7 JK |
4824 | |
4825 | unsigned int bytes_read; | |
4826 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
4827 | addr += bytes_read; | |
4828 | ||
4829 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
4830 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
4831 | if (bytes_read + length != section->size) | |
4832 | { | |
4833 | /* There may be multiple per-CU indices. */ | |
4834 | warning (_("Section .debug_names in %s length %s does not match " | |
4835 | "section length %s, ignoring .debug_names."), | |
4836 | filename, plongest (bytes_read + length), | |
4837 | pulongest (section->size)); | |
4838 | return false; | |
4839 | } | |
4840 | ||
4841 | /* The version number. */ | |
4842 | uint16_t version = read_2_bytes (abfd, addr); | |
4843 | addr += 2; | |
4844 | if (version != 5) | |
4845 | { | |
4846 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
4847 | "ignoring .debug_names."), | |
4848 | filename, version); | |
4849 | return false; | |
4850 | } | |
4851 | ||
4852 | /* Padding. */ | |
4853 | uint16_t padding = read_2_bytes (abfd, addr); | |
4854 | addr += 2; | |
4855 | if (padding != 0) | |
4856 | { | |
4857 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
4858 | "ignoring .debug_names."), | |
4859 | filename, padding); | |
4860 | return false; | |
4861 | } | |
4862 | ||
4863 | /* comp_unit_count - The number of CUs in the CU list. */ | |
4864 | map.cu_count = read_4_bytes (abfd, addr); | |
4865 | addr += 4; | |
4866 | ||
4867 | /* local_type_unit_count - The number of TUs in the local TU | |
4868 | list. */ | |
4869 | map.tu_count = read_4_bytes (abfd, addr); | |
4870 | addr += 4; | |
4871 | ||
4872 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
4873 | list. */ | |
4874 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
4875 | addr += 4; | |
4876 | if (foreign_tu_count != 0) | |
4877 | { | |
4878 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
4879 | "ignoring .debug_names."), | |
4880 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
4881 | return false; | |
4882 | } | |
4883 | ||
4884 | /* bucket_count - The number of hash buckets in the hash lookup | |
4885 | table. */ | |
4886 | map.bucket_count = read_4_bytes (abfd, addr); | |
4887 | addr += 4; | |
4888 | ||
4889 | /* name_count - The number of unique names in the index. */ | |
4890 | map.name_count = read_4_bytes (abfd, addr); | |
4891 | addr += 4; | |
4892 | ||
4893 | /* abbrev_table_size - The size in bytes of the abbreviations | |
4894 | table. */ | |
4895 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
4896 | addr += 4; | |
4897 | ||
4898 | /* augmentation_string_size - The size in bytes of the augmentation | |
4899 | string. This value is rounded up to a multiple of 4. */ | |
4900 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
4901 | addr += 4; | |
4902 | map.augmentation_is_gdb = ((augmentation_string_size | |
4903 | == sizeof (dwarf5_augmentation)) | |
4904 | && memcmp (addr, dwarf5_augmentation, | |
4905 | sizeof (dwarf5_augmentation)) == 0); | |
4906 | augmentation_string_size += (-augmentation_string_size) & 3; | |
4907 | addr += augmentation_string_size; | |
4908 | ||
4909 | /* List of CUs */ | |
4910 | map.cu_table_reordered = addr; | |
4911 | addr += map.cu_count * map.offset_size; | |
4912 | ||
4913 | /* List of Local TUs */ | |
4914 | map.tu_table_reordered = addr; | |
4915 | addr += map.tu_count * map.offset_size; | |
4916 | ||
4917 | /* Hash Lookup Table */ | |
4918 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4919 | addr += map.bucket_count * 4; | |
4920 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4921 | addr += map.name_count * 4; | |
4922 | ||
4923 | /* Name Table */ | |
4924 | map.name_table_string_offs_reordered = addr; | |
4925 | addr += map.name_count * map.offset_size; | |
4926 | map.name_table_entry_offs_reordered = addr; | |
4927 | addr += map.name_count * map.offset_size; | |
4928 | ||
4929 | const gdb_byte *abbrev_table_start = addr; | |
4930 | for (;;) | |
4931 | { | |
927aa2e7 JK |
4932 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
4933 | addr += bytes_read; | |
4934 | if (index_num == 0) | |
4935 | break; | |
4936 | ||
4937 | const auto insertpair | |
4938 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
4939 | if (!insertpair.second) | |
4940 | { | |
4941 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
4942 | "ignoring .debug_names."), | |
4943 | filename, pulongest (index_num)); | |
4944 | return false; | |
4945 | } | |
4946 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
4947 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4948 | addr += bytes_read; | |
4949 | ||
4950 | for (;;) | |
4951 | { | |
4952 | mapped_debug_names::index_val::attr attr; | |
4953 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4954 | addr += bytes_read; | |
4955 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4956 | addr += bytes_read; | |
4957 | if (attr.form == DW_FORM_implicit_const) | |
4958 | { | |
4959 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
4960 | &bytes_read); | |
4961 | addr += bytes_read; | |
4962 | } | |
4963 | if (attr.dw_idx == 0 && attr.form == 0) | |
4964 | break; | |
4965 | indexval.attr_vec.push_back (std::move (attr)); | |
4966 | } | |
4967 | } | |
4968 | if (addr != abbrev_table_start + abbrev_table_size) | |
4969 | { | |
4970 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
4971 | "of size %s vs. written as %u, ignoring .debug_names."), |
4972 | filename, plongest (addr - abbrev_table_start), | |
4973 | abbrev_table_size); | |
927aa2e7 JK |
4974 | return false; |
4975 | } | |
4976 | map.entry_pool = addr; | |
4977 | ||
4978 | return true; | |
4979 | } | |
4980 | ||
4981 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
4982 | list. */ | |
4983 | ||
4984 | static void | |
ed2dc618 | 4985 | create_cus_from_debug_names_list (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
4986 | const mapped_debug_names &map, |
4987 | dwarf2_section_info §ion, | |
b76e467d | 4988 | bool is_dwz) |
927aa2e7 JK |
4989 | { |
4990 | sect_offset sect_off_prev; | |
4991 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
4992 | { | |
4993 | sect_offset sect_off_next; | |
4994 | if (i < map.cu_count) | |
4995 | { | |
4996 | sect_off_next | |
4997 | = (sect_offset) (extract_unsigned_integer | |
4998 | (map.cu_table_reordered + i * map.offset_size, | |
4999 | map.offset_size, | |
5000 | map.dwarf5_byte_order)); | |
5001 | } | |
5002 | else | |
5003 | sect_off_next = (sect_offset) section.size; | |
5004 | if (i >= 1) | |
5005 | { | |
5006 | const ULONGEST length = sect_off_next - sect_off_prev; | |
b76e467d | 5007 | dwarf2_per_cu_data *per_cu |
ed2dc618 | 5008 | = create_cu_from_index_list (dwarf2_per_objfile, §ion, is_dwz, |
927aa2e7 | 5009 | sect_off_prev, length); |
b76e467d | 5010 | dwarf2_per_objfile->all_comp_units.push_back (per_cu); |
927aa2e7 JK |
5011 | } |
5012 | sect_off_prev = sect_off_next; | |
5013 | } | |
5014 | } | |
5015 | ||
5016 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 5017 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
5018 | |
5019 | static void | |
ed2dc618 | 5020 | create_cus_from_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile, |
927aa2e7 JK |
5021 | const mapped_debug_names &map, |
5022 | const mapped_debug_names &dwz_map) | |
5023 | { | |
b76e467d SM |
5024 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
5025 | dwarf2_per_objfile->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 5026 | |
ed2dc618 SM |
5027 | create_cus_from_debug_names_list (dwarf2_per_objfile, map, |
5028 | dwarf2_per_objfile->info, | |
b76e467d | 5029 | false /* is_dwz */); |
927aa2e7 JK |
5030 | |
5031 | if (dwz_map.cu_count == 0) | |
5032 | return; | |
5033 | ||
ed2dc618 SM |
5034 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
5035 | create_cus_from_debug_names_list (dwarf2_per_objfile, dwz_map, dwz->info, | |
b76e467d | 5036 | true /* is_dwz */); |
927aa2e7 JK |
5037 | } |
5038 | ||
5039 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
5040 | elements of all the CUs and return true. Otherwise, return false. */ | |
5041 | ||
5042 | static bool | |
ed2dc618 | 5043 | dwarf2_read_debug_names (struct dwarf2_per_objfile *dwarf2_per_objfile) |
927aa2e7 | 5044 | { |
22ca247e TT |
5045 | std::unique_ptr<mapped_debug_names> map |
5046 | (new mapped_debug_names (dwarf2_per_objfile)); | |
ed2dc618 SM |
5047 | mapped_debug_names dwz_map (dwarf2_per_objfile); |
5048 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
927aa2e7 JK |
5049 | |
5050 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
5051 | &dwarf2_per_objfile->debug_names, | |
22ca247e | 5052 | *map)) |
927aa2e7 JK |
5053 | return false; |
5054 | ||
5055 | /* Don't use the index if it's empty. */ | |
22ca247e | 5056 | if (map->name_count == 0) |
927aa2e7 JK |
5057 | return false; |
5058 | ||
5059 | /* If there is a .dwz file, read it so we can get its CU list as | |
5060 | well. */ | |
ed2dc618 | 5061 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
927aa2e7 JK |
5062 | if (dwz != NULL) |
5063 | { | |
5064 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 5065 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
5066 | &dwz->debug_names, dwz_map)) |
5067 | { | |
5068 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 5069 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
5070 | return false; |
5071 | } | |
5072 | } | |
5073 | ||
22ca247e | 5074 | create_cus_from_debug_names (dwarf2_per_objfile, *map, dwz_map); |
927aa2e7 | 5075 | |
22ca247e | 5076 | if (map->tu_count != 0) |
927aa2e7 JK |
5077 | { |
5078 | /* We can only handle a single .debug_types when we have an | |
5079 | index. */ | |
fd5866f6 | 5080 | if (dwarf2_per_objfile->types.size () != 1) |
927aa2e7 JK |
5081 | return false; |
5082 | ||
fd5866f6 | 5083 | dwarf2_section_info *section = &dwarf2_per_objfile->types[0]; |
927aa2e7 JK |
5084 | |
5085 | create_signatured_type_table_from_debug_names | |
22ca247e | 5086 | (dwarf2_per_objfile, *map, section, &dwarf2_per_objfile->abbrev); |
927aa2e7 JK |
5087 | } |
5088 | ||
ed2dc618 SM |
5089 | create_addrmap_from_aranges (dwarf2_per_objfile, |
5090 | &dwarf2_per_objfile->debug_aranges); | |
927aa2e7 | 5091 | |
22ca247e | 5092 | dwarf2_per_objfile->debug_names_table = std::move (map); |
927aa2e7 JK |
5093 | dwarf2_per_objfile->using_index = 1; |
5094 | dwarf2_per_objfile->quick_file_names_table = | |
b76e467d | 5095 | create_quick_file_names_table (dwarf2_per_objfile->all_comp_units.size ()); |
927aa2e7 JK |
5096 | |
5097 | return true; | |
5098 | } | |
5099 | ||
927aa2e7 JK |
5100 | /* Type used to manage iterating over all CUs looking for a symbol for |
5101 | .debug_names. */ | |
5102 | ||
5103 | class dw2_debug_names_iterator | |
5104 | { | |
5105 | public: | |
927aa2e7 | 5106 | dw2_debug_names_iterator (const mapped_debug_names &map, |
2b79f376 SM |
5107 | gdb::optional<block_enum> block_index, |
5108 | domain_enum domain, | |
927aa2e7 | 5109 | const char *name) |
2b79f376 | 5110 | : m_map (map), m_block_index (block_index), m_domain (domain), |
927aa2e7 JK |
5111 | m_addr (find_vec_in_debug_names (map, name)) |
5112 | {} | |
5113 | ||
5114 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
5115 | search_domain search, uint32_t namei) | |
5116 | : m_map (map), | |
5117 | m_search (search), | |
5118 | m_addr (find_vec_in_debug_names (map, namei)) | |
5119 | {} | |
5120 | ||
3b00ef10 TT |
5121 | dw2_debug_names_iterator (const mapped_debug_names &map, |
5122 | block_enum block_index, domain_enum domain, | |
5123 | uint32_t namei) | |
5124 | : m_map (map), m_block_index (block_index), m_domain (domain), | |
5125 | m_addr (find_vec_in_debug_names (map, namei)) | |
5126 | {} | |
5127 | ||
927aa2e7 JK |
5128 | /* Return the next matching CU or NULL if there are no more. */ |
5129 | dwarf2_per_cu_data *next (); | |
5130 | ||
5131 | private: | |
5132 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5133 | const char *name); | |
5134 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
5135 | uint32_t namei); | |
5136 | ||
5137 | /* The internalized form of .debug_names. */ | |
5138 | const mapped_debug_names &m_map; | |
5139 | ||
2b79f376 SM |
5140 | /* If set, only look for symbols that match that block. Valid values are |
5141 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
5142 | const gdb::optional<block_enum> m_block_index; | |
927aa2e7 JK |
5143 | |
5144 | /* The kind of symbol we're looking for. */ | |
5145 | const domain_enum m_domain = UNDEF_DOMAIN; | |
5146 | const search_domain m_search = ALL_DOMAIN; | |
5147 | ||
5148 | /* The list of CUs from the index entry of the symbol, or NULL if | |
5149 | not found. */ | |
5150 | const gdb_byte *m_addr; | |
5151 | }; | |
5152 | ||
5153 | const char * | |
5154 | mapped_debug_names::namei_to_name (uint32_t namei) const | |
5155 | { | |
5156 | const ULONGEST namei_string_offs | |
5157 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
5158 | + namei * offset_size), | |
5159 | offset_size, | |
5160 | dwarf5_byte_order); | |
4f44ae6c TT |
5161 | return read_indirect_string_at_offset (dwarf2_per_objfile, |
5162 | namei_string_offs); | |
927aa2e7 JK |
5163 | } |
5164 | ||
5165 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
5166 | found, return pointer to its pool data. If NAME cannot be found, | |
5167 | return NULL. */ | |
5168 | ||
5169 | const gdb_byte * | |
5170 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5171 | (const mapped_debug_names &map, const char *name) | |
5172 | { | |
5173 | int (*cmp) (const char *, const char *); | |
5174 | ||
54ee4252 | 5175 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
5176 | if (current_language->la_language == language_cplus |
5177 | || current_language->la_language == language_fortran | |
5178 | || current_language->la_language == language_d) | |
5179 | { | |
5180 | /* NAME is already canonical. Drop any qualifiers as | |
5181 | .debug_names does not contain any. */ | |
5182 | ||
5183 | if (strchr (name, '(') != NULL) | |
5184 | { | |
54ee4252 | 5185 | without_params = cp_remove_params (name); |
927aa2e7 | 5186 | if (without_params != NULL) |
54ee4252 | 5187 | name = without_params.get (); |
927aa2e7 JK |
5188 | } |
5189 | } | |
5190 | ||
5191 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
5192 | ||
5193 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
5194 | uint32_t namei | |
5195 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5196 | (map.bucket_table_reordered | |
5197 | + (full_hash % map.bucket_count)), 4, | |
5198 | map.dwarf5_byte_order); | |
5199 | if (namei == 0) | |
5200 | return NULL; | |
5201 | --namei; | |
5202 | if (namei >= map.name_count) | |
5203 | { | |
b98664d3 | 5204 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5205 | "[in module %s]"), |
5206 | namei, map.name_count, | |
ed2dc618 | 5207 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5208 | return NULL; |
5209 | } | |
5210 | ||
5211 | for (;;) | |
5212 | { | |
5213 | const uint32_t namei_full_hash | |
5214 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
5215 | (map.hash_table_reordered + namei), 4, | |
5216 | map.dwarf5_byte_order); | |
5217 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
5218 | return NULL; | |
5219 | ||
5220 | if (full_hash == namei_full_hash) | |
5221 | { | |
5222 | const char *const namei_string = map.namei_to_name (namei); | |
5223 | ||
5224 | #if 0 /* An expensive sanity check. */ | |
5225 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
5226 | { | |
b98664d3 | 5227 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
5228 | "[in module %s]"), |
5229 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
5230 | return NULL; | |
5231 | } | |
5232 | #endif | |
5233 | ||
5234 | if (cmp (namei_string, name) == 0) | |
5235 | { | |
5236 | const ULONGEST namei_entry_offs | |
5237 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5238 | + namei * map.offset_size), | |
5239 | map.offset_size, map.dwarf5_byte_order); | |
5240 | return map.entry_pool + namei_entry_offs; | |
5241 | } | |
5242 | } | |
5243 | ||
5244 | ++namei; | |
5245 | if (namei >= map.name_count) | |
5246 | return NULL; | |
5247 | } | |
5248 | } | |
5249 | ||
5250 | const gdb_byte * | |
5251 | dw2_debug_names_iterator::find_vec_in_debug_names | |
5252 | (const mapped_debug_names &map, uint32_t namei) | |
5253 | { | |
5254 | if (namei >= map.name_count) | |
5255 | { | |
b98664d3 | 5256 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
5257 | "[in module %s]"), |
5258 | namei, map.name_count, | |
ed2dc618 | 5259 | objfile_name (map.dwarf2_per_objfile->objfile)); |
927aa2e7 JK |
5260 | return NULL; |
5261 | } | |
5262 | ||
5263 | const ULONGEST namei_entry_offs | |
5264 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
5265 | + namei * map.offset_size), | |
5266 | map.offset_size, map.dwarf5_byte_order); | |
5267 | return map.entry_pool + namei_entry_offs; | |
5268 | } | |
5269 | ||
5270 | /* See dw2_debug_names_iterator. */ | |
5271 | ||
5272 | dwarf2_per_cu_data * | |
5273 | dw2_debug_names_iterator::next () | |
5274 | { | |
5275 | if (m_addr == NULL) | |
5276 | return NULL; | |
5277 | ||
ed2dc618 SM |
5278 | struct dwarf2_per_objfile *dwarf2_per_objfile = m_map.dwarf2_per_objfile; |
5279 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5280 | bfd *const abfd = objfile->obfd; | |
927aa2e7 JK |
5281 | |
5282 | again: | |
5283 | ||
5284 | unsigned int bytes_read; | |
5285 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5286 | m_addr += bytes_read; | |
5287 | if (abbrev == 0) | |
5288 | return NULL; | |
5289 | ||
5290 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5291 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5292 | { | |
b98664d3 | 5293 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5294 | "[in module %s]"), |
ed2dc618 | 5295 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5296 | return NULL; |
5297 | } | |
5298 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5299 | enum class symbol_linkage { |
5300 | unknown, | |
5301 | static_, | |
5302 | extern_, | |
23c13d42 | 5303 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5304 | dwarf2_per_cu_data *per_cu = NULL; |
5305 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5306 | { | |
5307 | ULONGEST ull; | |
5308 | switch (attr.form) | |
5309 | { | |
5310 | case DW_FORM_implicit_const: | |
5311 | ull = attr.implicit_const; | |
5312 | break; | |
5313 | case DW_FORM_flag_present: | |
5314 | ull = 1; | |
5315 | break; | |
5316 | case DW_FORM_udata: | |
5317 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5318 | m_addr += bytes_read; | |
5319 | break; | |
5320 | default: | |
b98664d3 | 5321 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5322 | dwarf_form_name (attr.form), |
ed2dc618 | 5323 | objfile_name (objfile)); |
927aa2e7 JK |
5324 | return NULL; |
5325 | } | |
5326 | switch (attr.dw_idx) | |
5327 | { | |
5328 | case DW_IDX_compile_unit: | |
5329 | /* Don't crash on bad data. */ | |
b76e467d | 5330 | if (ull >= dwarf2_per_objfile->all_comp_units.size ()) |
927aa2e7 | 5331 | { |
b98664d3 | 5332 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5333 | " [in module %s]"), |
5334 | pulongest (ull), | |
5335 | objfile_name (dwarf2_per_objfile->objfile)); | |
5336 | continue; | |
5337 | } | |
ff4c9fec | 5338 | per_cu = dwarf2_per_objfile->get_cutu (ull); |
927aa2e7 | 5339 | break; |
8af5c486 JK |
5340 | case DW_IDX_type_unit: |
5341 | /* Don't crash on bad data. */ | |
b2bdb8cf | 5342 | if (ull >= dwarf2_per_objfile->all_type_units.size ()) |
8af5c486 | 5343 | { |
b98664d3 | 5344 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5345 | " [in module %s]"), |
5346 | pulongest (ull), | |
5347 | objfile_name (dwarf2_per_objfile->objfile)); | |
5348 | continue; | |
5349 | } | |
ff4c9fec | 5350 | per_cu = &dwarf2_per_objfile->get_tu (ull)->per_cu; |
8af5c486 | 5351 | break; |
927aa2e7 JK |
5352 | case DW_IDX_GNU_internal: |
5353 | if (!m_map.augmentation_is_gdb) | |
5354 | break; | |
23c13d42 | 5355 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5356 | break; |
5357 | case DW_IDX_GNU_external: | |
5358 | if (!m_map.augmentation_is_gdb) | |
5359 | break; | |
23c13d42 | 5360 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5361 | break; |
5362 | } | |
5363 | } | |
5364 | ||
5365 | /* Skip if already read in. */ | |
5366 | if (per_cu->v.quick->compunit_symtab) | |
5367 | goto again; | |
5368 | ||
5369 | /* Check static vs global. */ | |
23c13d42 | 5370 | if (symbol_linkage_ != symbol_linkage::unknown && m_block_index.has_value ()) |
927aa2e7 | 5371 | { |
2b79f376 | 5372 | const bool want_static = *m_block_index == STATIC_BLOCK; |
23c13d42 SM |
5373 | const bool symbol_is_static = |
5374 | symbol_linkage_ == symbol_linkage::static_; | |
beadd3e8 | 5375 | if (want_static != symbol_is_static) |
2b79f376 | 5376 | goto again; |
927aa2e7 JK |
5377 | } |
5378 | ||
5379 | /* Match dw2_symtab_iter_next, symbol_kind | |
5380 | and debug_names::psymbol_tag. */ | |
5381 | switch (m_domain) | |
5382 | { | |
5383 | case VAR_DOMAIN: | |
5384 | switch (indexval.dwarf_tag) | |
5385 | { | |
5386 | case DW_TAG_variable: | |
5387 | case DW_TAG_subprogram: | |
5388 | /* Some types are also in VAR_DOMAIN. */ | |
5389 | case DW_TAG_typedef: | |
5390 | case DW_TAG_structure_type: | |
5391 | break; | |
5392 | default: | |
5393 | goto again; | |
5394 | } | |
5395 | break; | |
5396 | case STRUCT_DOMAIN: | |
5397 | switch (indexval.dwarf_tag) | |
5398 | { | |
5399 | case DW_TAG_typedef: | |
5400 | case DW_TAG_structure_type: | |
5401 | break; | |
5402 | default: | |
5403 | goto again; | |
5404 | } | |
5405 | break; | |
5406 | case LABEL_DOMAIN: | |
5407 | switch (indexval.dwarf_tag) | |
5408 | { | |
5409 | case 0: | |
5410 | case DW_TAG_variable: | |
5411 | break; | |
5412 | default: | |
5413 | goto again; | |
5414 | } | |
5415 | break; | |
59c35742 AB |
5416 | case MODULE_DOMAIN: |
5417 | switch (indexval.dwarf_tag) | |
5418 | { | |
5419 | case DW_TAG_module: | |
5420 | break; | |
5421 | default: | |
5422 | goto again; | |
5423 | } | |
5424 | break; | |
927aa2e7 JK |
5425 | default: |
5426 | break; | |
5427 | } | |
5428 | ||
5429 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5430 | debug_names::psymbol_tag. */ | |
5431 | switch (m_search) | |
4b514bc8 | 5432 | { |
927aa2e7 JK |
5433 | case VARIABLES_DOMAIN: |
5434 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5435 | { |
927aa2e7 JK |
5436 | case DW_TAG_variable: |
5437 | break; | |
5438 | default: | |
5439 | goto again; | |
4b514bc8 | 5440 | } |
927aa2e7 JK |
5441 | break; |
5442 | case FUNCTIONS_DOMAIN: | |
5443 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5444 | { |
927aa2e7 JK |
5445 | case DW_TAG_subprogram: |
5446 | break; | |
5447 | default: | |
5448 | goto again; | |
4b514bc8 | 5449 | } |
927aa2e7 JK |
5450 | break; |
5451 | case TYPES_DOMAIN: | |
5452 | switch (indexval.dwarf_tag) | |
5453 | { | |
5454 | case DW_TAG_typedef: | |
5455 | case DW_TAG_structure_type: | |
5456 | break; | |
5457 | default: | |
5458 | goto again; | |
5459 | } | |
5460 | break; | |
59c35742 AB |
5461 | case MODULES_DOMAIN: |
5462 | switch (indexval.dwarf_tag) | |
5463 | { | |
5464 | case DW_TAG_module: | |
5465 | break; | |
5466 | default: | |
5467 | goto again; | |
5468 | } | |
927aa2e7 JK |
5469 | default: |
5470 | break; | |
4b514bc8 | 5471 | } |
927aa2e7 JK |
5472 | |
5473 | return per_cu; | |
4b514bc8 | 5474 | } |
61920122 | 5475 | |
927aa2e7 | 5476 | static struct compunit_symtab * |
c7f839cb | 5477 | dw2_debug_names_lookup_symbol (struct objfile *objfile, block_enum block_index, |
927aa2e7 | 5478 | const char *name, domain_enum domain) |
4b514bc8 | 5479 | { |
ed2dc618 SM |
5480 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5481 | = get_dwarf2_per_objfile (objfile); | |
61920122 | 5482 | |
927aa2e7 JK |
5483 | const auto &mapp = dwarf2_per_objfile->debug_names_table; |
5484 | if (!mapp) | |
61920122 | 5485 | { |
927aa2e7 JK |
5486 | /* index is NULL if OBJF_READNOW. */ |
5487 | return NULL; | |
5488 | } | |
5489 | const auto &map = *mapp; | |
9291a0cd | 5490 | |
2b79f376 | 5491 | dw2_debug_names_iterator iter (map, block_index, domain, name); |
9703b513 | 5492 | |
927aa2e7 JK |
5493 | struct compunit_symtab *stab_best = NULL; |
5494 | struct dwarf2_per_cu_data *per_cu; | |
5495 | while ((per_cu = iter.next ()) != NULL) | |
5496 | { | |
5497 | struct symbol *sym, *with_opaque = NULL; | |
58f0c718 | 5498 | struct compunit_symtab *stab = dw2_instantiate_symtab (per_cu, false); |
927aa2e7 | 5499 | const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (stab); |
582942f4 | 5500 | const struct block *block = BLOCKVECTOR_BLOCK (bv, block_index); |
9703b513 | 5501 | |
927aa2e7 JK |
5502 | sym = block_find_symbol (block, name, domain, |
5503 | block_find_non_opaque_type_preferred, | |
5504 | &with_opaque); | |
9703b513 | 5505 | |
927aa2e7 JK |
5506 | /* Some caution must be observed with overloaded functions and |
5507 | methods, since the index will not contain any overload | |
5508 | information (but NAME might contain it). */ | |
a3ec0bb1 | 5509 | |
927aa2e7 | 5510 | if (sym != NULL |
987012b8 | 5511 | && strcmp_iw (sym->search_name (), name) == 0) |
927aa2e7 JK |
5512 | return stab; |
5513 | if (with_opaque != NULL | |
987012b8 | 5514 | && strcmp_iw (with_opaque->search_name (), name) == 0) |
927aa2e7 | 5515 | stab_best = stab; |
9703b513 | 5516 | |
927aa2e7 | 5517 | /* Keep looking through other CUs. */ |
9703b513 TT |
5518 | } |
5519 | ||
927aa2e7 | 5520 | return stab_best; |
9703b513 TT |
5521 | } |
5522 | ||
927aa2e7 JK |
5523 | /* This dumps minimal information about .debug_names. It is called |
5524 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
5525 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 5526 | |
927aa2e7 JK |
5527 | static void |
5528 | dw2_debug_names_dump (struct objfile *objfile) | |
5529 | { | |
ed2dc618 SM |
5530 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5531 | = get_dwarf2_per_objfile (objfile); | |
5532 | ||
927aa2e7 JK |
5533 | gdb_assert (dwarf2_per_objfile->using_index); |
5534 | printf_filtered (".debug_names:"); | |
5535 | if (dwarf2_per_objfile->debug_names_table) | |
5536 | printf_filtered (" exists\n"); | |
5537 | else | |
5538 | printf_filtered (" faked for \"readnow\"\n"); | |
5539 | printf_filtered ("\n"); | |
9291a0cd TT |
5540 | } |
5541 | ||
9291a0cd | 5542 | static void |
927aa2e7 JK |
5543 | dw2_debug_names_expand_symtabs_for_function (struct objfile *objfile, |
5544 | const char *func_name) | |
9291a0cd | 5545 | { |
ed2dc618 SM |
5546 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5547 | = get_dwarf2_per_objfile (objfile); | |
ae2de4f8 | 5548 | |
927aa2e7 JK |
5549 | /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */ |
5550 | if (dwarf2_per_objfile->debug_names_table) | |
24c79950 | 5551 | { |
927aa2e7 | 5552 | const mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
24c79950 | 5553 | |
2b79f376 | 5554 | dw2_debug_names_iterator iter (map, {}, VAR_DOMAIN, func_name); |
24c79950 | 5555 | |
927aa2e7 JK |
5556 | struct dwarf2_per_cu_data *per_cu; |
5557 | while ((per_cu = iter.next ()) != NULL) | |
58f0c718 | 5558 | dw2_instantiate_symtab (per_cu, false); |
927aa2e7 JK |
5559 | } |
5560 | } | |
24c79950 | 5561 | |
3b00ef10 TT |
5562 | static void |
5563 | dw2_debug_names_map_matching_symbols | |
5564 | (struct objfile *objfile, | |
5565 | const lookup_name_info &name, domain_enum domain, | |
5566 | int global, | |
5567 | gdb::function_view<symbol_found_callback_ftype> callback, | |
5568 | symbol_compare_ftype *ordered_compare) | |
5569 | { | |
5570 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
5571 | = get_dwarf2_per_objfile (objfile); | |
5572 | ||
5573 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
5574 | if (!dwarf2_per_objfile->debug_names_table) | |
5575 | return; | |
5576 | ||
5577 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; | |
5578 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; | |
5579 | ||
5580 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
5581 | auto matcher = [&] (const char *symname) | |
5582 | { | |
5583 | if (ordered_compare == nullptr) | |
5584 | return true; | |
5585 | return ordered_compare (symname, match_name) == 0; | |
5586 | }; | |
5587 | ||
5588 | dw2_expand_symtabs_matching_symbol (map, name, matcher, ALL_DOMAIN, | |
5589 | [&] (offset_type namei) | |
5590 | { | |
5591 | /* The name was matched, now expand corresponding CUs that were | |
5592 | marked. */ | |
5593 | dw2_debug_names_iterator iter (map, block_kind, domain, namei); | |
5594 | ||
5595 | struct dwarf2_per_cu_data *per_cu; | |
5596 | while ((per_cu = iter.next ()) != NULL) | |
5597 | dw2_expand_symtabs_matching_one (per_cu, nullptr, nullptr); | |
5598 | return true; | |
5599 | }); | |
5600 | ||
5601 | /* It's a shame we couldn't do this inside the | |
5602 | dw2_expand_symtabs_matching_symbol callback, but that skips CUs | |
5603 | that have already been expanded. Instead, this loop matches what | |
5604 | the psymtab code does. */ | |
5605 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) | |
5606 | { | |
5607 | struct compunit_symtab *cust = per_cu->v.quick->compunit_symtab; | |
5608 | if (cust != nullptr) | |
5609 | { | |
5610 | const struct block *block | |
5611 | = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), block_kind); | |
5612 | if (!iterate_over_symbols_terminated (block, name, | |
5613 | domain, callback)) | |
5614 | break; | |
5615 | } | |
5616 | } | |
5617 | } | |
5618 | ||
927aa2e7 JK |
5619 | static void |
5620 | dw2_debug_names_expand_symtabs_matching | |
5621 | (struct objfile *objfile, | |
5622 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
5623 | const lookup_name_info &lookup_name, | |
5624 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
5625 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
5626 | enum search_domain kind) | |
5627 | { | |
ed2dc618 SM |
5628 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5629 | = get_dwarf2_per_objfile (objfile); | |
9291a0cd | 5630 | |
927aa2e7 JK |
5631 | /* debug_names_table is NULL if OBJF_READNOW. */ |
5632 | if (!dwarf2_per_objfile->debug_names_table) | |
5633 | return; | |
9291a0cd | 5634 | |
ed2dc618 | 5635 | dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile, file_matcher); |
24c79950 | 5636 | |
44ed8f3e | 5637 | mapped_debug_names &map = *dwarf2_per_objfile->debug_names_table; |
bbf2f4df | 5638 | |
44ed8f3e PA |
5639 | dw2_expand_symtabs_matching_symbol (map, lookup_name, |
5640 | symbol_matcher, | |
5641 | kind, [&] (offset_type namei) | |
927aa2e7 | 5642 | { |
927aa2e7 JK |
5643 | /* The name was matched, now expand corresponding CUs that were |
5644 | marked. */ | |
5645 | dw2_debug_names_iterator iter (map, kind, namei); | |
bbf2f4df | 5646 | |
927aa2e7 JK |
5647 | struct dwarf2_per_cu_data *per_cu; |
5648 | while ((per_cu = iter.next ()) != NULL) | |
5649 | dw2_expand_symtabs_matching_one (per_cu, file_matcher, | |
5650 | expansion_notify); | |
3b00ef10 | 5651 | return true; |
44ed8f3e | 5652 | }); |
9291a0cd TT |
5653 | } |
5654 | ||
927aa2e7 | 5655 | const struct quick_symbol_functions dwarf2_debug_names_functions = |
9291a0cd TT |
5656 | { |
5657 | dw2_has_symbols, | |
5658 | dw2_find_last_source_symtab, | |
5659 | dw2_forget_cached_source_info, | |
f8eba3c6 | 5660 | dw2_map_symtabs_matching_filename, |
927aa2e7 | 5661 | dw2_debug_names_lookup_symbol, |
9291a0cd | 5662 | dw2_print_stats, |
927aa2e7 | 5663 | dw2_debug_names_dump, |
927aa2e7 | 5664 | dw2_debug_names_expand_symtabs_for_function, |
9291a0cd | 5665 | dw2_expand_all_symtabs, |
652a8996 | 5666 | dw2_expand_symtabs_with_fullname, |
3b00ef10 | 5667 | dw2_debug_names_map_matching_symbols, |
927aa2e7 | 5668 | dw2_debug_names_expand_symtabs_matching, |
43f3e411 | 5669 | dw2_find_pc_sect_compunit_symtab, |
71a3c369 | 5670 | NULL, |
9291a0cd TT |
5671 | dw2_map_symbol_filenames |
5672 | }; | |
5673 | ||
4485a1c1 SM |
5674 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
5675 | to either a dwarf2_per_objfile or dwz_file object. */ | |
5676 | ||
5677 | template <typename T> | |
5678 | static gdb::array_view<const gdb_byte> | |
5679 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
5680 | { | |
5681 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
5682 | ||
96b79293 | 5683 | if (section->empty ()) |
4485a1c1 SM |
5684 | return {}; |
5685 | ||
5686 | /* Older elfutils strip versions could keep the section in the main | |
5687 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 5688 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
4485a1c1 SM |
5689 | return {}; |
5690 | ||
96b79293 | 5691 | section->read (obj); |
4485a1c1 | 5692 | |
8bebfcda PA |
5693 | /* dwarf2_section_info::size is a bfd_size_type, while |
5694 | gdb::array_view works with size_t. On 32-bit hosts, with | |
5695 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
5696 | is 32-bit. So we need an explicit narrowing conversion here. | |
5697 | This is fine, because it's impossible to allocate or mmap an | |
5698 | array/buffer larger than what size_t can represent. */ | |
5699 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
5700 | } |
5701 | ||
87d6a7aa SM |
5702 | /* Lookup the index cache for the contents of the index associated to |
5703 | DWARF2_OBJ. */ | |
5704 | ||
5705 | static gdb::array_view<const gdb_byte> | |
5706 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_objfile *dwarf2_obj) | |
5707 | { | |
5708 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
5709 | if (build_id == nullptr) | |
5710 | return {}; | |
5711 | ||
5712 | return global_index_cache.lookup_gdb_index (build_id, | |
5713 | &dwarf2_obj->index_cache_res); | |
5714 | } | |
5715 | ||
5716 | /* Same as the above, but for DWZ. */ | |
5717 | ||
5718 | static gdb::array_view<const gdb_byte> | |
5719 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
5720 | { | |
5721 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
5722 | if (build_id == nullptr) | |
5723 | return {}; | |
5724 | ||
5725 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
5726 | } | |
5727 | ||
3c0aa29a | 5728 | /* See symfile.h. */ |
9291a0cd | 5729 | |
3c0aa29a PA |
5730 | bool |
5731 | dwarf2_initialize_objfile (struct objfile *objfile, dw_index_kind *index_kind) | |
9291a0cd | 5732 | { |
ed2dc618 SM |
5733 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5734 | = get_dwarf2_per_objfile (objfile); | |
5735 | ||
9291a0cd TT |
5736 | /* If we're about to read full symbols, don't bother with the |
5737 | indices. In this case we also don't care if some other debug | |
5738 | format is making psymtabs, because they are all about to be | |
5739 | expanded anyway. */ | |
5740 | if ((objfile->flags & OBJF_READNOW)) | |
5741 | { | |
9291a0cd | 5742 | dwarf2_per_objfile->using_index = 1; |
ed2dc618 SM |
5743 | create_all_comp_units (dwarf2_per_objfile); |
5744 | create_all_type_units (dwarf2_per_objfile); | |
b76e467d SM |
5745 | dwarf2_per_objfile->quick_file_names_table |
5746 | = create_quick_file_names_table | |
5747 | (dwarf2_per_objfile->all_comp_units.size ()); | |
9291a0cd | 5748 | |
b76e467d | 5749 | for (int i = 0; i < (dwarf2_per_objfile->all_comp_units.size () |
b2bdb8cf | 5750 | + dwarf2_per_objfile->all_type_units.size ()); ++i) |
9291a0cd | 5751 | { |
ff4c9fec | 5752 | dwarf2_per_cu_data *per_cu = dwarf2_per_objfile->get_cutu (i); |
9291a0cd | 5753 | |
e254ef6a DE |
5754 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
5755 | struct dwarf2_per_cu_quick_data); | |
9291a0cd TT |
5756 | } |
5757 | ||
5758 | /* Return 1 so that gdb sees the "quick" functions. However, | |
5759 | these functions will be no-ops because we will have expanded | |
5760 | all symtabs. */ | |
3c0aa29a PA |
5761 | *index_kind = dw_index_kind::GDB_INDEX; |
5762 | return true; | |
9291a0cd TT |
5763 | } |
5764 | ||
ed2dc618 | 5765 | if (dwarf2_read_debug_names (dwarf2_per_objfile)) |
3c0aa29a PA |
5766 | { |
5767 | *index_kind = dw_index_kind::DEBUG_NAMES; | |
5768 | return true; | |
5769 | } | |
927aa2e7 | 5770 | |
4485a1c1 SM |
5771 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, |
5772 | get_gdb_index_contents_from_section<struct dwarf2_per_objfile>, | |
5773 | get_gdb_index_contents_from_section<dwz_file>)) | |
3c0aa29a PA |
5774 | { |
5775 | *index_kind = dw_index_kind::GDB_INDEX; | |
5776 | return true; | |
5777 | } | |
9291a0cd | 5778 | |
87d6a7aa SM |
5779 | /* ... otherwise, try to find the index in the index cache. */ |
5780 | if (dwarf2_read_gdb_index (dwarf2_per_objfile, | |
5781 | get_gdb_index_contents_from_cache, | |
5782 | get_gdb_index_contents_from_cache_dwz)) | |
5783 | { | |
5784 | global_index_cache.hit (); | |
5785 | *index_kind = dw_index_kind::GDB_INDEX; | |
5786 | return true; | |
5787 | } | |
5788 | ||
5789 | global_index_cache.miss (); | |
3c0aa29a | 5790 | return false; |
9291a0cd TT |
5791 | } |
5792 | ||
5793 | \f | |
5794 | ||
dce234bc PP |
5795 | /* Build a partial symbol table. */ |
5796 | ||
5797 | void | |
f29dff0a | 5798 | dwarf2_build_psymtabs (struct objfile *objfile) |
dce234bc | 5799 | { |
ed2dc618 SM |
5800 | struct dwarf2_per_objfile *dwarf2_per_objfile |
5801 | = get_dwarf2_per_objfile (objfile); | |
c9bf0622 | 5802 | |
6eee24ce | 5803 | init_psymbol_list (objfile, 1024); |
c906108c | 5804 | |
a70b8144 | 5805 | try |
c9bf0622 TT |
5806 | { |
5807 | /* This isn't really ideal: all the data we allocate on the | |
5808 | objfile's obstack is still uselessly kept around. However, | |
5809 | freeing it seems unsafe. */ | |
906768f9 | 5810 | psymtab_discarder psymtabs (objfile); |
ed2dc618 | 5811 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile); |
906768f9 | 5812 | psymtabs.keep (); |
87d6a7aa SM |
5813 | |
5814 | /* (maybe) store an index in the cache. */ | |
5815 | global_index_cache.store (dwarf2_per_objfile); | |
c9bf0622 | 5816 | } |
230d2906 | 5817 | catch (const gdb_exception_error &except) |
492d29ea PA |
5818 | { |
5819 | exception_print (gdb_stderr, except); | |
5820 | } | |
c906108c | 5821 | } |
c906108c | 5822 | |
3b80fe9b DE |
5823 | /* Find the base address of the compilation unit for range lists and |
5824 | location lists. It will normally be specified by DW_AT_low_pc. | |
5825 | In DWARF-3 draft 4, the base address could be overridden by | |
5826 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5827 | compilation units with discontinuous ranges. */ | |
5828 | ||
5829 | static void | |
5830 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5831 | { | |
5832 | struct attribute *attr; | |
5833 | ||
5834 | cu->base_known = 0; | |
5835 | cu->base_address = 0; | |
5836 | ||
5837 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 5838 | if (attr != nullptr) |
3b80fe9b | 5839 | { |
cd6c91b4 | 5840 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5841 | cu->base_known = 1; |
5842 | } | |
5843 | else | |
5844 | { | |
5845 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 5846 | if (attr != nullptr) |
3b80fe9b | 5847 | { |
cd6c91b4 | 5848 | cu->base_address = attr->value_as_address (); |
3b80fe9b DE |
5849 | cu->base_known = 1; |
5850 | } | |
5851 | } | |
5852 | } | |
5853 | ||
36586728 TT |
5854 | /* Helper function that returns the proper abbrev section for |
5855 | THIS_CU. */ | |
5856 | ||
5857 | static struct dwarf2_section_info * | |
5858 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5859 | { | |
5860 | struct dwarf2_section_info *abbrev; | |
ed2dc618 | 5861 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
36586728 TT |
5862 | |
5863 | if (this_cu->is_dwz) | |
ed2dc618 | 5864 | abbrev = &dwarf2_get_dwz_file (dwarf2_per_objfile)->abbrev; |
36586728 TT |
5865 | else |
5866 | abbrev = &dwarf2_per_objfile->abbrev; | |
5867 | ||
5868 | return abbrev; | |
5869 | } | |
5870 | ||
f4dc4d17 DE |
5871 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5872 | ||
5873 | static sect_offset | |
ed2dc618 SM |
5874 | read_abbrev_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
5875 | struct dwarf2_section_info *section, | |
9c541725 | 5876 | sect_offset sect_off) |
f4dc4d17 | 5877 | { |
96b79293 | 5878 | bfd *abfd = section->get_bfd_owner (); |
d521ce57 | 5879 | const gdb_byte *info_ptr; |
ac298888 | 5880 | unsigned int initial_length_size, offset_size; |
43988095 | 5881 | uint16_t version; |
f4dc4d17 | 5882 | |
96b79293 | 5883 | section->read (dwarf2_per_objfile->objfile); |
9c541725 | 5884 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5885 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5886 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5887 | info_ptr += initial_length_size; |
5888 | ||
5889 | version = read_2_bytes (abfd, info_ptr); | |
5890 | info_ptr += 2; | |
5891 | if (version >= 5) | |
5892 | { | |
5893 | /* Skip unit type and address size. */ | |
5894 | info_ptr += 2; | |
5895 | } | |
5896 | ||
24aa364d | 5897 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5898 | } |
5899 | ||
b83470bf TT |
5900 | /* A partial symtab that is used only for include files. */ |
5901 | struct dwarf2_include_psymtab : public partial_symtab | |
5902 | { | |
5903 | dwarf2_include_psymtab (const char *filename, struct objfile *objfile) | |
5904 | : partial_symtab (filename, objfile) | |
5905 | { | |
5906 | } | |
5907 | ||
5908 | void read_symtab (struct objfile *objfile) override | |
5909 | { | |
5910 | expand_psymtab (objfile); | |
5911 | } | |
5912 | ||
5913 | void expand_psymtab (struct objfile *objfile) override | |
5914 | { | |
5915 | if (m_readin) | |
5916 | return; | |
5917 | /* It's an include file, no symbols to read for it. | |
5918 | Everything is in the parent symtab. */ | |
5919 | read_dependencies (objfile); | |
5920 | m_readin = true; | |
5921 | } | |
5922 | ||
5923 | bool readin_p () const override | |
5924 | { | |
5925 | return m_readin; | |
5926 | } | |
5927 | ||
5928 | struct compunit_symtab *get_compunit_symtab () const override | |
5929 | { | |
5930 | return nullptr; | |
5931 | } | |
5932 | ||
5933 | private: | |
5934 | ||
5935 | bool m_readin = false; | |
5936 | }; | |
5937 | ||
aaa75496 JB |
5938 | /* Allocate a new partial symtab for file named NAME and mark this new |
5939 | partial symtab as being an include of PST. */ | |
5940 | ||
5941 | static void | |
891813be | 5942 | dwarf2_create_include_psymtab (const char *name, dwarf2_psymtab *pst, |
aaa75496 JB |
5943 | struct objfile *objfile) |
5944 | { | |
b83470bf | 5945 | dwarf2_include_psymtab *subpst = new dwarf2_include_psymtab (name, objfile); |
aaa75496 | 5946 | |
fbd9ab74 JK |
5947 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
5948 | { | |
5949 | /* It shares objfile->objfile_obstack. */ | |
5950 | subpst->dirname = pst->dirname; | |
5951 | } | |
5952 | ||
a9342b62 | 5953 | subpst->dependencies = objfile->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
5954 | subpst->dependencies[0] = pst; |
5955 | subpst->number_of_dependencies = 1; | |
aaa75496 JB |
5956 | } |
5957 | ||
5958 | /* Read the Line Number Program data and extract the list of files | |
5959 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5960 | partial symtab for each of these included files. */ |
aaa75496 JB |
5961 | |
5962 | static void | |
5963 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 | 5964 | struct die_info *die, |
891813be | 5965 | dwarf2_psymtab *pst) |
aaa75496 | 5966 | { |
fff8551c | 5967 | line_header_up lh; |
d85a05f0 | 5968 | struct attribute *attr; |
aaa75496 | 5969 | |
d85a05f0 | 5970 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
435d3d88 | 5971 | if (attr != nullptr) |
9c541725 | 5972 | lh = dwarf_decode_line_header ((sect_offset) DW_UNSND (attr), cu); |
aaa75496 JB |
5973 | if (lh == NULL) |
5974 | return; /* No linetable, so no includes. */ | |
5975 | ||
79748972 TT |
5976 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
5977 | that we pass in the raw text_low here; that is ok because we're | |
5978 | only decoding the line table to make include partial symtabs, and | |
5979 | so the addresses aren't really used. */ | |
4ae976d1 | 5980 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 5981 | pst->raw_text_low (), 1); |
aaa75496 JB |
5982 | } |
5983 | ||
348e048f | 5984 | static hashval_t |
52dc124a | 5985 | hash_signatured_type (const void *item) |
348e048f | 5986 | { |
9a3c8263 SM |
5987 | const struct signatured_type *sig_type |
5988 | = (const struct signatured_type *) item; | |
9a619af0 | 5989 | |
348e048f | 5990 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5991 | return sig_type->signature; |
348e048f DE |
5992 | } |
5993 | ||
5994 | static int | |
52dc124a | 5995 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5996 | { |
9a3c8263 SM |
5997 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5998 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5999 | |
348e048f DE |
6000 | return lhs->signature == rhs->signature; |
6001 | } | |
6002 | ||
1fd400ff TT |
6003 | /* Allocate a hash table for signatured types. */ |
6004 | ||
b0b6a987 | 6005 | static htab_up |
298e9637 | 6006 | allocate_signatured_type_table () |
1fd400ff | 6007 | { |
b0b6a987 TT |
6008 | return htab_up (htab_create_alloc (41, |
6009 | hash_signatured_type, | |
6010 | eq_signatured_type, | |
6011 | NULL, xcalloc, xfree)); | |
1fd400ff TT |
6012 | } |
6013 | ||
d467dd73 | 6014 | /* A helper function to add a signatured type CU to a table. */ |
1fd400ff TT |
6015 | |
6016 | static int | |
d467dd73 | 6017 | add_signatured_type_cu_to_table (void **slot, void *datum) |
1fd400ff | 6018 | { |
9a3c8263 | 6019 | struct signatured_type *sigt = (struct signatured_type *) *slot; |
b2bdb8cf SM |
6020 | std::vector<signatured_type *> *all_type_units |
6021 | = (std::vector<signatured_type *> *) datum; | |
1fd400ff | 6022 | |
b2bdb8cf | 6023 | all_type_units->push_back (sigt); |
1fd400ff TT |
6024 | |
6025 | return 1; | |
6026 | } | |
6027 | ||
78d4d2c5 | 6028 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
6029 | and fill them into TYPES_HTAB. It will process only type units, |
6030 | therefore DW_UT_type. */ | |
c88ee1f0 | 6031 | |
78d4d2c5 | 6032 | static void |
ed2dc618 SM |
6033 | create_debug_type_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6034 | struct dwo_file *dwo_file, | |
b0b6a987 | 6035 | dwarf2_section_info *section, htab_up &types_htab, |
43988095 | 6036 | rcuh_kind section_kind) |
348e048f | 6037 | { |
3019eac3 | 6038 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
4bdcc0c1 | 6039 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
6040 | bfd *abfd; |
6041 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 6042 | |
4bdcc0c1 DE |
6043 | abbrev_section = (dwo_file != NULL |
6044 | ? &dwo_file->sections.abbrev | |
6045 | : &dwarf2_per_objfile->abbrev); | |
6046 | ||
b4f54984 | 6047 | if (dwarf_read_debug) |
43988095 | 6048 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", |
96b79293 TT |
6049 | section->get_name (), |
6050 | abbrev_section->get_file_name ()); | |
09406207 | 6051 | |
96b79293 | 6052 | section->read (objfile); |
78d4d2c5 | 6053 | info_ptr = section->buffer; |
348e048f | 6054 | |
78d4d2c5 JK |
6055 | if (info_ptr == NULL) |
6056 | return; | |
348e048f | 6057 | |
78d4d2c5 JK |
6058 | /* We can't set abfd until now because the section may be empty or |
6059 | not present, in which case the bfd is unknown. */ | |
96b79293 | 6060 | abfd = section->get_bfd_owner (); |
348e048f | 6061 | |
c0ab21c2 TT |
6062 | /* We don't use cutu_reader here because we don't need to read |
6063 | any dies: the signature is in the header. */ | |
3019eac3 | 6064 | |
78d4d2c5 JK |
6065 | end_ptr = info_ptr + section->size; |
6066 | while (info_ptr < end_ptr) | |
6067 | { | |
78d4d2c5 JK |
6068 | struct signatured_type *sig_type; |
6069 | struct dwo_unit *dwo_tu; | |
6070 | void **slot; | |
6071 | const gdb_byte *ptr = info_ptr; | |
6072 | struct comp_unit_head header; | |
6073 | unsigned int length; | |
8b70b953 | 6074 | |
9c541725 | 6075 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 6076 | |
a49dd8dd JK |
6077 | /* Initialize it due to a false compiler warning. */ |
6078 | header.signature = -1; | |
9c541725 | 6079 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 6080 | |
78d4d2c5 JK |
6081 | /* We need to read the type's signature in order to build the hash |
6082 | table, but we don't need anything else just yet. */ | |
348e048f | 6083 | |
ed2dc618 | 6084 | ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, &header, section, |
43988095 | 6085 | abbrev_section, ptr, section_kind); |
348e048f | 6086 | |
4057dfde | 6087 | length = header.get_length (); |
6caca83c | 6088 | |
78d4d2c5 JK |
6089 | /* Skip dummy type units. */ |
6090 | if (ptr >= info_ptr + length | |
43988095 JK |
6091 | || peek_abbrev_code (abfd, ptr) == 0 |
6092 | || header.unit_type != DW_UT_type) | |
78d4d2c5 JK |
6093 | { |
6094 | info_ptr += length; | |
6095 | continue; | |
6096 | } | |
dee91e82 | 6097 | |
78d4d2c5 JK |
6098 | if (types_htab == NULL) |
6099 | { | |
6100 | if (dwo_file) | |
298e9637 | 6101 | types_htab = allocate_dwo_unit_table (); |
78d4d2c5 | 6102 | else |
298e9637 | 6103 | types_htab = allocate_signatured_type_table (); |
78d4d2c5 | 6104 | } |
8b70b953 | 6105 | |
78d4d2c5 JK |
6106 | if (dwo_file) |
6107 | { | |
6108 | sig_type = NULL; | |
6109 | dwo_tu = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6110 | struct dwo_unit); | |
6111 | dwo_tu->dwo_file = dwo_file; | |
43988095 | 6112 | dwo_tu->signature = header.signature; |
9c541725 | 6113 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; |
78d4d2c5 | 6114 | dwo_tu->section = section; |
9c541725 | 6115 | dwo_tu->sect_off = sect_off; |
78d4d2c5 JK |
6116 | dwo_tu->length = length; |
6117 | } | |
6118 | else | |
6119 | { | |
6120 | /* N.B.: type_offset is not usable if this type uses a DWO file. | |
6121 | The real type_offset is in the DWO file. */ | |
6122 | dwo_tu = NULL; | |
6123 | sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6124 | struct signatured_type); | |
43988095 | 6125 | sig_type->signature = header.signature; |
9c541725 | 6126 | sig_type->type_offset_in_tu = header.type_cu_offset_in_tu; |
e3b94546 | 6127 | sig_type->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
78d4d2c5 JK |
6128 | sig_type->per_cu.is_debug_types = 1; |
6129 | sig_type->per_cu.section = section; | |
9c541725 | 6130 | sig_type->per_cu.sect_off = sect_off; |
78d4d2c5 JK |
6131 | sig_type->per_cu.length = length; |
6132 | } | |
6133 | ||
b0b6a987 | 6134 | slot = htab_find_slot (types_htab.get (), |
78d4d2c5 JK |
6135 | dwo_file ? (void*) dwo_tu : (void *) sig_type, |
6136 | INSERT); | |
6137 | gdb_assert (slot != NULL); | |
6138 | if (*slot != NULL) | |
6139 | { | |
9c541725 | 6140 | sect_offset dup_sect_off; |
0349ea22 | 6141 | |
3019eac3 DE |
6142 | if (dwo_file) |
6143 | { | |
78d4d2c5 JK |
6144 | const struct dwo_unit *dup_tu |
6145 | = (const struct dwo_unit *) *slot; | |
6146 | ||
9c541725 | 6147 | dup_sect_off = dup_tu->sect_off; |
3019eac3 DE |
6148 | } |
6149 | else | |
6150 | { | |
78d4d2c5 JK |
6151 | const struct signatured_type *dup_tu |
6152 | = (const struct signatured_type *) *slot; | |
6153 | ||
9c541725 | 6154 | dup_sect_off = dup_tu->per_cu.sect_off; |
3019eac3 | 6155 | } |
8b70b953 | 6156 | |
b98664d3 | 6157 | complaint (_("debug type entry at offset %s is duplicate to" |
9d8780f0 SM |
6158 | " the entry at offset %s, signature %s"), |
6159 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
43988095 | 6160 | hex_string (header.signature)); |
78d4d2c5 JK |
6161 | } |
6162 | *slot = dwo_file ? (void *) dwo_tu : (void *) sig_type; | |
3019eac3 | 6163 | |
78d4d2c5 | 6164 | if (dwarf_read_debug > 1) |
9d8780f0 SM |
6165 | fprintf_unfiltered (gdb_stdlog, " offset %s, signature %s\n", |
6166 | sect_offset_str (sect_off), | |
43988095 | 6167 | hex_string (header.signature)); |
3019eac3 | 6168 | |
78d4d2c5 JK |
6169 | info_ptr += length; |
6170 | } | |
6171 | } | |
3019eac3 | 6172 | |
78d4d2c5 JK |
6173 | /* Create the hash table of all entries in the .debug_types |
6174 | (or .debug_types.dwo) section(s). | |
6175 | If reading a DWO file, then DWO_FILE is a pointer to the DWO file object, | |
6176 | otherwise it is NULL. | |
b3c8eb43 | 6177 | |
78d4d2c5 | 6178 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 6179 | |
78d4d2c5 | 6180 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 6181 | |
78d4d2c5 | 6182 | static void |
ed2dc618 SM |
6183 | create_debug_types_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
6184 | struct dwo_file *dwo_file, | |
fd5866f6 | 6185 | gdb::array_view<dwarf2_section_info> type_sections, |
b0b6a987 | 6186 | htab_up &types_htab) |
78d4d2c5 | 6187 | { |
fd5866f6 SM |
6188 | for (dwarf2_section_info §ion : type_sections) |
6189 | create_debug_type_hash_table (dwarf2_per_objfile, dwo_file, §ion, | |
ed2dc618 | 6190 | types_htab, rcuh_kind::TYPE); |
3019eac3 DE |
6191 | } |
6192 | ||
6193 | /* Create the hash table of all entries in the .debug_types section, | |
6194 | and initialize all_type_units. | |
6195 | The result is zero if there is an error (e.g. missing .debug_types section), | |
6196 | otherwise non-zero. */ | |
6197 | ||
6198 | static int | |
ed2dc618 | 6199 | create_all_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
3019eac3 | 6200 | { |
b0b6a987 | 6201 | htab_up types_htab; |
3019eac3 | 6202 | |
ed2dc618 SM |
6203 | create_debug_type_hash_table (dwarf2_per_objfile, NULL, |
6204 | &dwarf2_per_objfile->info, types_htab, | |
43988095 | 6205 | rcuh_kind::COMPILE); |
ed2dc618 SM |
6206 | create_debug_types_hash_table (dwarf2_per_objfile, NULL, |
6207 | dwarf2_per_objfile->types, types_htab); | |
3019eac3 DE |
6208 | if (types_htab == NULL) |
6209 | { | |
6210 | dwarf2_per_objfile->signatured_types = NULL; | |
6211 | return 0; | |
6212 | } | |
6213 | ||
b0b6a987 | 6214 | dwarf2_per_objfile->signatured_types = std::move (types_htab); |
348e048f | 6215 | |
b2bdb8cf | 6216 | gdb_assert (dwarf2_per_objfile->all_type_units.empty ()); |
b0b6a987 TT |
6217 | dwarf2_per_objfile->all_type_units.reserve |
6218 | (htab_elements (dwarf2_per_objfile->signatured_types.get ())); | |
b2bdb8cf | 6219 | |
b0b6a987 TT |
6220 | htab_traverse_noresize (dwarf2_per_objfile->signatured_types.get (), |
6221 | add_signatured_type_cu_to_table, | |
b2bdb8cf | 6222 | &dwarf2_per_objfile->all_type_units); |
1fd400ff | 6223 | |
348e048f DE |
6224 | return 1; |
6225 | } | |
6226 | ||
6aa5f3a6 DE |
6227 | /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types. |
6228 | If SLOT is non-NULL, it is the entry to use in the hash table. | |
6229 | Otherwise we find one. */ | |
6230 | ||
6231 | static struct signatured_type * | |
ed2dc618 SM |
6232 | add_type_unit (struct dwarf2_per_objfile *dwarf2_per_objfile, ULONGEST sig, |
6233 | void **slot) | |
6aa5f3a6 DE |
6234 | { |
6235 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
6aa5f3a6 | 6236 | |
b2bdb8cf SM |
6237 | if (dwarf2_per_objfile->all_type_units.size () |
6238 | == dwarf2_per_objfile->all_type_units.capacity ()) | |
6239 | ++dwarf2_per_objfile->tu_stats.nr_all_type_units_reallocs; | |
6aa5f3a6 | 6240 | |
b2bdb8cf SM |
6241 | signatured_type *sig_type = OBSTACK_ZALLOC (&objfile->objfile_obstack, |
6242 | struct signatured_type); | |
6243 | ||
6244 | dwarf2_per_objfile->all_type_units.push_back (sig_type); | |
6aa5f3a6 DE |
6245 | sig_type->signature = sig; |
6246 | sig_type->per_cu.is_debug_types = 1; | |
6247 | if (dwarf2_per_objfile->using_index) | |
6248 | { | |
6249 | sig_type->per_cu.v.quick = | |
6250 | OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
6251 | struct dwarf2_per_cu_quick_data); | |
6252 | } | |
6253 | ||
6254 | if (slot == NULL) | |
6255 | { | |
b0b6a987 | 6256 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 DE |
6257 | sig_type, INSERT); |
6258 | } | |
6259 | gdb_assert (*slot == NULL); | |
6260 | *slot = sig_type; | |
6261 | /* The rest of sig_type must be filled in by the caller. */ | |
6262 | return sig_type; | |
6263 | } | |
6264 | ||
a2ce51a0 DE |
6265 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
6266 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
6267 | ||
6268 | static void | |
ed2dc618 | 6269 | fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile *dwarf2_per_objfile, |
a2ce51a0 DE |
6270 | struct signatured_type *sig_entry, |
6271 | struct dwo_unit *dwo_entry) | |
6272 | { | |
7ee85ab1 | 6273 | /* Make sure we're not clobbering something we don't expect to. */ |
a2ce51a0 DE |
6274 | gdb_assert (! sig_entry->per_cu.queued); |
6275 | gdb_assert (sig_entry->per_cu.cu == NULL); | |
6aa5f3a6 DE |
6276 | if (dwarf2_per_objfile->using_index) |
6277 | { | |
6278 | gdb_assert (sig_entry->per_cu.v.quick != NULL); | |
43f3e411 | 6279 | gdb_assert (sig_entry->per_cu.v.quick->compunit_symtab == NULL); |
6aa5f3a6 DE |
6280 | } |
6281 | else | |
6282 | gdb_assert (sig_entry->per_cu.v.psymtab == NULL); | |
a2ce51a0 | 6283 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 6284 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 6285 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
6286 | gdb_assert (sig_entry->dwo_unit == NULL); |
6287 | ||
6288 | sig_entry->per_cu.section = dwo_entry->section; | |
9c541725 | 6289 | sig_entry->per_cu.sect_off = dwo_entry->sect_off; |
7ee85ab1 DE |
6290 | sig_entry->per_cu.length = dwo_entry->length; |
6291 | sig_entry->per_cu.reading_dwo_directly = 1; | |
e3b94546 | 6292 | sig_entry->per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
a2ce51a0 DE |
6293 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
6294 | sig_entry->dwo_unit = dwo_entry; | |
6295 | } | |
6296 | ||
6297 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
6298 | If we haven't read the TU yet, create the signatured_type data structure |
6299 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
6300 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
6301 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
6302 | containing that CU. Otherwise we could end up reading several other DWO | |
6303 | files (due to comdat folding) to process the transitive closure of all the | |
6304 | mentioned TUs, and that can be slow. The current DWO file will have every | |
6305 | type signature that it needs. | |
a2ce51a0 DE |
6306 | We only do this for .gdb_index because in the psymtab case we already have |
6307 | to read all the DWOs to build the type unit groups. */ | |
6308 | ||
6309 | static struct signatured_type * | |
6310 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6311 | { | |
518817b3 SM |
6312 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6313 | = cu->per_cu->dwarf2_per_objfile; | |
a2ce51a0 DE |
6314 | struct dwo_file *dwo_file; |
6315 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
6316 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6317 | void **slot; |
a2ce51a0 DE |
6318 | |
6319 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6320 | ||
6aa5f3a6 DE |
6321 | /* If TU skeletons have been removed then we may not have read in any |
6322 | TUs yet. */ | |
6323 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6324 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 DE |
6325 | |
6326 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
6327 | Use the global signatured_types array to do our own comdat-folding |
6328 | of types. If this is the first time we're reading this TU, and | |
6329 | the TU has an entry in .gdb_index, replace the recorded data from | |
6330 | .gdb_index with this TU. */ | |
a2ce51a0 | 6331 | |
a2ce51a0 | 6332 | find_sig_entry.signature = sig; |
b0b6a987 | 6333 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6334 | &find_sig_entry, INSERT); |
9a3c8263 | 6335 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
6336 | |
6337 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
6338 | read. Don't reassign the global entry to point to this DWO if that's |
6339 | the case. Also note that if the TU is already being read, it may not | |
6340 | have come from a DWO, the program may be a mix of Fission-compiled | |
6341 | code and non-Fission-compiled code. */ | |
6342 | ||
6343 | /* Have we already tried to read this TU? | |
6344 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6345 | needn't exist in the global table yet). */ | |
6346 | if (sig_entry != NULL && sig_entry->per_cu.tu_read) | |
a2ce51a0 DE |
6347 | return sig_entry; |
6348 | ||
6aa5f3a6 DE |
6349 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6350 | dwo_unit of the TU itself. */ | |
6351 | dwo_file = cu->dwo_unit->dwo_file; | |
6352 | ||
a2ce51a0 DE |
6353 | /* Ok, this is the first time we're reading this TU. */ |
6354 | if (dwo_file->tus == NULL) | |
6355 | return NULL; | |
6356 | find_dwo_entry.signature = sig; | |
b0b6a987 TT |
6357 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
6358 | &find_dwo_entry); | |
a2ce51a0 DE |
6359 | if (dwo_entry == NULL) |
6360 | return NULL; | |
6361 | ||
6aa5f3a6 DE |
6362 | /* If the global table doesn't have an entry for this TU, add one. */ |
6363 | if (sig_entry == NULL) | |
ed2dc618 | 6364 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6aa5f3a6 | 6365 | |
ed2dc618 | 6366 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); |
89e63ee4 | 6367 | sig_entry->per_cu.tu_read = 1; |
a2ce51a0 DE |
6368 | return sig_entry; |
6369 | } | |
6370 | ||
a2ce51a0 DE |
6371 | /* Subroutine of lookup_signatured_type. |
6372 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6373 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6374 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6375 | |
6376 | static struct signatured_type * | |
6377 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6378 | { | |
518817b3 SM |
6379 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6380 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6381 | struct dwp_file *dwp_file = get_dwp_file (dwarf2_per_objfile); |
a2ce51a0 DE |
6382 | struct dwo_unit *dwo_entry; |
6383 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6384 | void **slot; |
a2ce51a0 DE |
6385 | |
6386 | gdb_assert (cu->dwo_unit && dwarf2_per_objfile->using_index); | |
6387 | gdb_assert (dwp_file != NULL); | |
6388 | ||
6aa5f3a6 DE |
6389 | /* If TU skeletons have been removed then we may not have read in any |
6390 | TUs yet. */ | |
6391 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 6392 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
a2ce51a0 | 6393 | |
6aa5f3a6 | 6394 | find_sig_entry.signature = sig; |
b0b6a987 | 6395 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
6aa5f3a6 | 6396 | &find_sig_entry, INSERT); |
9a3c8263 | 6397 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6398 | |
6399 | /* Have we already tried to read this TU? | |
6400 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6401 | needn't exist in the global table yet). */ | |
6402 | if (sig_entry != NULL) | |
6403 | return sig_entry; | |
6404 | ||
a2ce51a0 DE |
6405 | if (dwp_file->tus == NULL) |
6406 | return NULL; | |
ed2dc618 | 6407 | dwo_entry = lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, NULL, |
57d63ce2 | 6408 | sig, 1 /* is_debug_types */); |
a2ce51a0 DE |
6409 | if (dwo_entry == NULL) |
6410 | return NULL; | |
6411 | ||
ed2dc618 SM |
6412 | sig_entry = add_type_unit (dwarf2_per_objfile, sig, slot); |
6413 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 6414 | |
a2ce51a0 DE |
6415 | return sig_entry; |
6416 | } | |
6417 | ||
380bca97 | 6418 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6419 | Returns NULL if signature SIG is not present in the table. |
6420 | It is up to the caller to complain about this. */ | |
348e048f DE |
6421 | |
6422 | static struct signatured_type * | |
a2ce51a0 | 6423 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6424 | { |
518817b3 SM |
6425 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6426 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 6427 | |
a2ce51a0 DE |
6428 | if (cu->dwo_unit |
6429 | && dwarf2_per_objfile->using_index) | |
6430 | { | |
6431 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6432 | These cases require special processing. */ | |
ed2dc618 | 6433 | if (get_dwp_file (dwarf2_per_objfile) == NULL) |
a2ce51a0 DE |
6434 | return lookup_dwo_signatured_type (cu, sig); |
6435 | else | |
6436 | return lookup_dwp_signatured_type (cu, sig); | |
6437 | } | |
6438 | else | |
6439 | { | |
6440 | struct signatured_type find_entry, *entry; | |
348e048f | 6441 | |
a2ce51a0 DE |
6442 | if (dwarf2_per_objfile->signatured_types == NULL) |
6443 | return NULL; | |
6444 | find_entry.signature = sig; | |
9a3c8263 | 6445 | entry = ((struct signatured_type *) |
b0b6a987 TT |
6446 | htab_find (dwarf2_per_objfile->signatured_types.get (), |
6447 | &find_entry)); | |
a2ce51a0 DE |
6448 | return entry; |
6449 | } | |
348e048f | 6450 | } |
18a8505e AT |
6451 | |
6452 | /* Return the address base of the compile unit, which, if exists, is stored | |
6453 | either at the attribute DW_AT_GNU_addr_base, or DW_AT_addr_base. */ | |
6454 | static gdb::optional<ULONGEST> | |
6455 | lookup_addr_base (struct die_info *comp_unit_die) | |
6456 | { | |
6457 | struct attribute *attr; | |
6458 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_addr_base); | |
6459 | if (attr == nullptr) | |
6460 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_GNU_addr_base); | |
6461 | if (attr == nullptr) | |
6462 | return gdb::optional<ULONGEST> (); | |
6463 | return DW_UNSND (attr); | |
6464 | } | |
6465 | ||
6466 | /* Return range lists base of the compile unit, which, if exists, is stored | |
6467 | either at the attribute DW_AT_rnglists_base or DW_AT_GNU_ranges_base. */ | |
6468 | static ULONGEST | |
6469 | lookup_ranges_base (struct die_info *comp_unit_die) | |
6470 | { | |
6471 | struct attribute *attr; | |
6472 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_rnglists_base); | |
6473 | if (attr == nullptr) | |
6474 | attr = dwarf2_attr_no_follow (comp_unit_die, DW_AT_GNU_ranges_base); | |
6475 | if (attr == nullptr) | |
6476 | return 0; | |
6477 | return DW_UNSND (attr); | |
6478 | } | |
6479 | ||
42e7ad6c | 6480 | /* Low level DIE reading support. */ |
348e048f | 6481 | |
d85a05f0 DJ |
6482 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6483 | ||
6484 | static void | |
6485 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6486 | struct dwarf2_cu *cu, |
3019eac3 | 6487 | struct dwarf2_section_info *section, |
685af9cd TT |
6488 | struct dwo_file *dwo_file, |
6489 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 6490 | { |
fceca515 | 6491 | gdb_assert (section->readin && section->buffer != NULL); |
96b79293 | 6492 | reader->abfd = section->get_bfd_owner (); |
d85a05f0 | 6493 | reader->cu = cu; |
3019eac3 | 6494 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6495 | reader->die_section = section; |
6496 | reader->buffer = section->buffer; | |
f664829e | 6497 | reader->buffer_end = section->buffer + section->size; |
685af9cd | 6498 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
6499 | } |
6500 | ||
c0ab21c2 | 6501 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6502 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
c0ab21c2 | 6503 | There's just a lot of work to do, and cutu_reader is big enough |
b0c7bfa9 DE |
6504 | already. |
6505 | ||
6506 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6507 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6508 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6509 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6510 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6511 | STUB_COMP_DIR may be non-NULL. | |
3e225074 | 6512 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
b0c7bfa9 | 6513 | are filled in with the info of the DIE from the DWO file. |
685af9cd TT |
6514 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
6515 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
6516 | kept around for at least as long as *RESULT_READER. | |
6517 | ||
b0c7bfa9 DE |
6518 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
6519 | ||
6520 | static int | |
6521 | read_cutu_die_from_dwo (struct dwarf2_per_cu_data *this_cu, | |
6522 | struct dwo_unit *dwo_unit, | |
b0c7bfa9 | 6523 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 6524 | const char *stub_comp_dir, |
b0c7bfa9 | 6525 | struct die_reader_specs *result_reader, |
d521ce57 | 6526 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 6527 | struct die_info **result_comp_unit_die, |
685af9cd | 6528 | abbrev_table_up *result_dwo_abbrev_table) |
b0c7bfa9 | 6529 | { |
ed2dc618 | 6530 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
b0c7bfa9 DE |
6531 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
6532 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6533 | bfd *abfd; |
d521ce57 | 6534 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6535 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6536 | int i,num_extra_attrs; | |
6537 | struct dwarf2_section_info *dwo_abbrev_section; | |
b0c7bfa9 DE |
6538 | struct die_info *comp_unit_die; |
6539 | ||
b0aeadb3 DE |
6540 | /* At most one of these may be provided. */ |
6541 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6542 | |
b0c7bfa9 DE |
6543 | /* These attributes aren't processed until later: |
6544 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6545 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6546 | referenced later. However, these attributes are found in the stub | |
6547 | which we won't have later. In order to not impose this complication | |
6548 | on the rest of the code, we read them here and copy them to the | |
6549 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6550 | |
6551 | stmt_list = NULL; | |
6552 | low_pc = NULL; | |
6553 | high_pc = NULL; | |
6554 | ranges = NULL; | |
6555 | comp_dir = NULL; | |
6556 | ||
6557 | if (stub_comp_unit_die != NULL) | |
6558 | { | |
6559 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6560 | DWO file. */ | |
6561 | if (! this_cu->is_debug_types) | |
6562 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); | |
6563 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6564 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6565 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6566 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6567 | ||
18a8505e | 6568 | cu->addr_base = lookup_addr_base (stub_comp_unit_die); |
b0c7bfa9 | 6569 | |
18a8505e AT |
6570 | /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute |
6571 | here (if needed). We need the value before we can process | |
6572 | DW_AT_ranges. */ | |
6573 | cu->ranges_base = lookup_ranges_base (stub_comp_unit_die); | |
b0c7bfa9 | 6574 | } |
a2ce51a0 DE |
6575 | else if (stub_comp_dir != NULL) |
6576 | { | |
6577 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
8d749320 | 6578 | comp_dir = XOBNEW (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6579 | comp_dir->name = DW_AT_comp_dir; |
6580 | comp_dir->form = DW_FORM_string; | |
6581 | DW_STRING_IS_CANONICAL (comp_dir) = 0; | |
6582 | DW_STRING (comp_dir) = stub_comp_dir; | |
6583 | } | |
b0c7bfa9 DE |
6584 | |
6585 | /* Set up for reading the DWO CU/TU. */ | |
6586 | cu->dwo_unit = dwo_unit; | |
685af9cd | 6587 | dwarf2_section_info *section = dwo_unit->section; |
96b79293 TT |
6588 | section->read (objfile); |
6589 | abfd = section->get_bfd_owner (); | |
9c541725 PA |
6590 | begin_info_ptr = info_ptr = (section->buffer |
6591 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 6592 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 DE |
6593 | |
6594 | if (this_cu->is_debug_types) | |
6595 | { | |
b0c7bfa9 DE |
6596 | struct signatured_type *sig_type = (struct signatured_type *) this_cu; |
6597 | ||
ed2dc618 SM |
6598 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6599 | &cu->header, section, | |
b0c7bfa9 | 6600 | dwo_abbrev_section, |
43988095 | 6601 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6602 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6603 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6604 | { |
6605 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 6606 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 6607 | hex_string (sig_type->signature), |
43988095 | 6608 | hex_string (cu->header.signature), |
9d8780f0 | 6609 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
6610 | bfd_get_filename (abfd)); |
6611 | } | |
9c541725 | 6612 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6613 | /* For DWOs coming from DWP files, we don't know the CU length |
6614 | nor the type's offset in the TU until now. */ | |
4057dfde | 6615 | dwo_unit->length = cu->header.get_length (); |
9c541725 | 6616 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6617 | |
6618 | /* Establish the type offset that can be used to lookup the type. | |
6619 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6620 | sig_type->type_offset_in_section |
6621 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6622 | } |
6623 | else | |
6624 | { | |
ed2dc618 SM |
6625 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6626 | &cu->header, section, | |
b0c7bfa9 | 6627 | dwo_abbrev_section, |
43988095 | 6628 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6629 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6630 | /* For DWOs coming from DWP files, we don't know the CU length |
6631 | until now. */ | |
4057dfde | 6632 | dwo_unit->length = cu->header.get_length (); |
b0c7bfa9 DE |
6633 | } |
6634 | ||
685af9cd | 6635 | *result_dwo_abbrev_table |
86de1d91 TT |
6636 | = abbrev_table::read (objfile, dwo_abbrev_section, |
6637 | cu->header.abbrev_sect_off); | |
685af9cd TT |
6638 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
6639 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
6640 | |
6641 | /* Read in the die, but leave space to copy over the attributes | |
6642 | from the stub. This has the benefit of simplifying the rest of | |
6643 | the code - all the work to maintain the illusion of a single | |
6644 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6645 | num_extra_attrs = ((stmt_list != NULL) | |
6646 | + (low_pc != NULL) | |
6647 | + (high_pc != NULL) | |
6648 | + (ranges != NULL) | |
6649 | + (comp_dir != NULL)); | |
6650 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
3e225074 | 6651 | num_extra_attrs); |
b0c7bfa9 DE |
6652 | |
6653 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6654 | comp_unit_die = *result_comp_unit_die; | |
6655 | i = comp_unit_die->num_attrs; | |
6656 | if (stmt_list != NULL) | |
6657 | comp_unit_die->attrs[i++] = *stmt_list; | |
6658 | if (low_pc != NULL) | |
6659 | comp_unit_die->attrs[i++] = *low_pc; | |
6660 | if (high_pc != NULL) | |
6661 | comp_unit_die->attrs[i++] = *high_pc; | |
6662 | if (ranges != NULL) | |
6663 | comp_unit_die->attrs[i++] = *ranges; | |
6664 | if (comp_dir != NULL) | |
6665 | comp_unit_die->attrs[i++] = *comp_dir; | |
6666 | comp_unit_die->num_attrs += num_extra_attrs; | |
6667 | ||
b4f54984 | 6668 | if (dwarf_die_debug) |
bf6af496 DE |
6669 | { |
6670 | fprintf_unfiltered (gdb_stdlog, | |
6671 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 6672 | section->get_name (), |
bf6af496 DE |
6673 | (unsigned) (begin_info_ptr - section->buffer), |
6674 | bfd_get_filename (abfd)); | |
b4f54984 | 6675 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6676 | } |
6677 | ||
b0c7bfa9 DE |
6678 | /* Skip dummy compilation units. */ |
6679 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6680 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6681 | return 0; | |
6682 | ||
6683 | *result_info_ptr = info_ptr; | |
6684 | return 1; | |
6685 | } | |
6686 | ||
a084a2a6 AT |
6687 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
6688 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
6689 | signature is part of the header. */ | |
6690 | static gdb::optional<ULONGEST> | |
6691 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
6692 | { | |
6693 | if (cu->header.version >= 5) | |
6694 | return cu->header.signature; | |
6695 | struct attribute *attr; | |
6696 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
6697 | if (attr == nullptr) | |
6698 | return gdb::optional<ULONGEST> (); | |
6699 | return DW_UNSND (attr); | |
6700 | } | |
6701 | ||
c0ab21c2 | 6702 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6703 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
6a506a2d | 6704 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6705 | |
6706 | static struct dwo_unit * | |
6707 | lookup_dwo_unit (struct dwarf2_per_cu_data *this_cu, | |
c0ab21c2 TT |
6708 | struct die_info *comp_unit_die, |
6709 | const char *dwo_name) | |
b0c7bfa9 DE |
6710 | { |
6711 | struct dwarf2_cu *cu = this_cu->cu; | |
b0c7bfa9 | 6712 | struct dwo_unit *dwo_unit; |
c0ab21c2 | 6713 | const char *comp_dir; |
b0c7bfa9 | 6714 | |
a2ce51a0 DE |
6715 | gdb_assert (cu != NULL); |
6716 | ||
b0c7bfa9 | 6717 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 6718 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 6719 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 DE |
6720 | |
6721 | if (this_cu->is_debug_types) | |
6722 | { | |
6723 | struct signatured_type *sig_type; | |
6724 | ||
6725 | /* Since this_cu is the first member of struct signatured_type, | |
6726 | we can go from a pointer to one to a pointer to the other. */ | |
6727 | sig_type = (struct signatured_type *) this_cu; | |
b0c7bfa9 DE |
6728 | dwo_unit = lookup_dwo_type_unit (sig_type, dwo_name, comp_dir); |
6729 | } | |
6730 | else | |
6731 | { | |
a084a2a6 AT |
6732 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
6733 | if (!signature.has_value ()) | |
b0c7bfa9 DE |
6734 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
6735 | " [in module %s]"), | |
e3b94546 | 6736 | dwo_name, objfile_name (this_cu->dwarf2_per_objfile->objfile)); |
b0c7bfa9 | 6737 | dwo_unit = lookup_dwo_comp_unit (this_cu, dwo_name, comp_dir, |
a084a2a6 | 6738 | *signature); |
b0c7bfa9 DE |
6739 | } |
6740 | ||
b0c7bfa9 DE |
6741 | return dwo_unit; |
6742 | } | |
6743 | ||
c0ab21c2 | 6744 | /* Subroutine of cutu_reader to simplify it. |
6aa5f3a6 | 6745 | See it for a description of the parameters. |
fcd3b13d | 6746 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 | 6747 | |
c0ab21c2 TT |
6748 | void |
6749 | cutu_reader::init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data *this_cu, | |
6751ebae | 6750 | int use_existing_cu) |
a2ce51a0 | 6751 | { |
a2ce51a0 | 6752 | struct signatured_type *sig_type; |
a2ce51a0 DE |
6753 | |
6754 | /* Verify we can do the following downcast, and that we have the | |
6755 | data we need. */ | |
6756 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6757 | sig_type = (struct signatured_type *) this_cu; | |
6758 | gdb_assert (sig_type->dwo_unit != NULL); | |
6759 | ||
6aa5f3a6 DE |
6760 | if (use_existing_cu && this_cu->cu != NULL) |
6761 | { | |
6762 | gdb_assert (this_cu->cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 | 6763 | /* There's no need to do the rereading_dwo_cu handling that |
c0ab21c2 | 6764 | cutu_reader does since we don't read the stub. */ |
6aa5f3a6 DE |
6765 | } |
6766 | else | |
6767 | { | |
6768 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6769 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 | 6770 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6aa5f3a6 DE |
6771 | } |
6772 | ||
6773 | /* A future optimization, if needed, would be to use an existing | |
6774 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6775 | could share abbrev tables. */ | |
a2ce51a0 DE |
6776 | |
6777 | if (read_cutu_die_from_dwo (this_cu, sig_type->dwo_unit, | |
a2ce51a0 DE |
6778 | NULL /* stub_comp_unit_die */, |
6779 | sig_type->dwo_unit->dwo_file->comp_dir, | |
4ebe4877 | 6780 | this, &info_ptr, |
3e225074 | 6781 | &comp_unit_die, |
c0ab21c2 | 6782 | &m_dwo_abbrev_table) == 0) |
a2ce51a0 DE |
6783 | { |
6784 | /* Dummy die. */ | |
c0ab21c2 | 6785 | dummy_p = true; |
a2ce51a0 | 6786 | } |
a2ce51a0 DE |
6787 | } |
6788 | ||
fd820528 | 6789 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6790 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6791 | |
f4dc4d17 DE |
6792 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6793 | Otherwise the table specified in the comp unit header is read in and used. | |
6794 | This is an optimization for when we already have the abbrev table. | |
6795 | ||
dee91e82 | 6796 | If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it. |
6751ebae | 6797 | Otherwise, a new CU is allocated with xmalloc. */ |
aaa75496 | 6798 | |
c0ab21c2 TT |
6799 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
6800 | struct abbrev_table *abbrev_table, | |
6751ebae | 6801 | int use_existing_cu, |
c0ab21c2 TT |
6802 | bool skip_partial) |
6803 | : die_reader_specs {}, | |
6751ebae | 6804 | m_this_cu (this_cu) |
c906108c | 6805 | { |
ed2dc618 | 6806 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 6807 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 6808 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6809 | bfd *abfd = section->get_bfd_owner (); |
dee91e82 | 6810 | struct dwarf2_cu *cu; |
c0ab21c2 | 6811 | const gdb_byte *begin_info_ptr; |
dee91e82 | 6812 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6813 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6814 | /* Non-zero if CU currently points to a DWO file and we need to |
6815 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6816 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6817 | int rereading_dwo_cu = 0; |
c906108c | 6818 | |
b4f54984 | 6819 | if (dwarf_die_debug) |
9d8780f0 | 6820 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6821 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6822 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6823 | |
a2ce51a0 DE |
6824 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6825 | file (instead of going through the stub), short-circuit all of this. */ | |
6826 | if (this_cu->reading_dwo_directly) | |
6827 | { | |
6828 | /* Narrow down the scope of possibilities to have to understand. */ | |
6829 | gdb_assert (this_cu->is_debug_types); | |
6830 | gdb_assert (abbrev_table == NULL); | |
6751ebae | 6831 | init_tu_and_read_dwo_dies (this_cu, use_existing_cu); |
a2ce51a0 DE |
6832 | return; |
6833 | } | |
6834 | ||
dee91e82 | 6835 | /* This is cheap if the section is already read in. */ |
96b79293 | 6836 | section->read (objfile); |
dee91e82 | 6837 | |
9c541725 | 6838 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6839 | |
6840 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 DE |
6841 | |
6842 | if (use_existing_cu && this_cu->cu != NULL) | |
6843 | { | |
6844 | cu = this_cu->cu; | |
42e7ad6c DE |
6845 | /* If this CU is from a DWO file we need to start over, we need to |
6846 | refetch the attributes from the skeleton CU. | |
6847 | This could be optimized by retrieving those attributes from when we | |
6848 | were here the first time: the previous comp_unit_die was stored in | |
6849 | comp_unit_obstack. But there's no data yet that we need this | |
6850 | optimization. */ | |
6851 | if (cu->dwo_unit != NULL) | |
6852 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6853 | } |
6854 | else | |
6855 | { | |
6856 | /* If !use_existing_cu, this_cu->cu must be NULL. */ | |
6857 | gdb_assert (this_cu->cu == NULL); | |
c0ab21c2 TT |
6858 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
6859 | cu = m_new_cu.get (); | |
42e7ad6c | 6860 | } |
dee91e82 | 6861 | |
b0c7bfa9 | 6862 | /* Get the header. */ |
9c541725 | 6863 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6864 | { |
6865 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6866 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6867 | } |
6868 | else | |
6869 | { | |
3019eac3 | 6870 | if (this_cu->is_debug_types) |
dee91e82 | 6871 | { |
ed2dc618 SM |
6872 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6873 | &cu->header, section, | |
4bdcc0c1 | 6874 | abbrev_section, info_ptr, |
43988095 | 6875 | rcuh_kind::TYPE); |
dee91e82 | 6876 | |
42e7ad6c DE |
6877 | /* Since per_cu is the first member of struct signatured_type, |
6878 | we can go from a pointer to one to a pointer to the other. */ | |
6879 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6880 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6881 | gdb_assert (sig_type->type_offset_in_tu |
6882 | == cu->header.type_cu_offset_in_tu); | |
6883 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6884 | |
42e7ad6c DE |
6885 | /* LENGTH has not been set yet for type units if we're |
6886 | using .gdb_index. */ | |
4057dfde | 6887 | this_cu->length = cu->header.get_length (); |
3019eac3 DE |
6888 | |
6889 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6890 | sig_type->type_offset_in_section = |
6891 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6892 | |
6893 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6894 | } |
6895 | else | |
6896 | { | |
ed2dc618 SM |
6897 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
6898 | &cu->header, section, | |
4bdcc0c1 | 6899 | abbrev_section, |
43988095 JK |
6900 | info_ptr, |
6901 | rcuh_kind::COMPILE); | |
dee91e82 | 6902 | |
9c541725 | 6903 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
4057dfde | 6904 | gdb_assert (this_cu->length == cu->header.get_length ()); |
43988095 | 6905 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6906 | } |
6907 | } | |
10b3939b | 6908 | |
6caca83c | 6909 | /* Skip dummy compilation units. */ |
dee91e82 | 6910 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 6911 | || peek_abbrev_code (abfd, info_ptr) == 0) |
c0ab21c2 TT |
6912 | { |
6913 | dummy_p = true; | |
6914 | return; | |
6915 | } | |
6caca83c | 6916 | |
433df2d4 DE |
6917 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6918 | And if we need to read them now, make sure they're freed when we're | |
c0ab21c2 | 6919 | done. */ |
f4dc4d17 | 6920 | if (abbrev_table != NULL) |
685af9cd TT |
6921 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
6922 | else | |
f4dc4d17 | 6923 | { |
c0ab21c2 | 6924 | m_abbrev_table_holder |
86de1d91 TT |
6925 | = abbrev_table::read (objfile, abbrev_section, |
6926 | cu->header.abbrev_sect_off); | |
c0ab21c2 | 6927 | abbrev_table = m_abbrev_table_holder.get (); |
42e7ad6c | 6928 | } |
af703f96 | 6929 | |
dee91e82 | 6930 | /* Read the top level CU/TU die. */ |
c0ab21c2 | 6931 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
3e225074 | 6932 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
93311388 | 6933 | |
58f0c718 | 6934 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
c0ab21c2 TT |
6935 | { |
6936 | dummy_p = true; | |
6937 | return; | |
6938 | } | |
58f0c718 | 6939 | |
b0c7bfa9 | 6940 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
6941 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
6942 | table from the DWO file and pass the ownership over to us. It will be | |
6943 | referenced from READER, so we must make sure to free it after we're done | |
6944 | with READER. | |
6945 | ||
b0c7bfa9 DE |
6946 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
6947 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 6948 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
a084a2a6 | 6949 | if (dwo_name != nullptr) |
3019eac3 | 6950 | { |
3019eac3 | 6951 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6952 | struct die_info *dwo_comp_unit_die; |
3019eac3 | 6953 | |
3e225074 | 6954 | if (comp_unit_die->has_children) |
6a506a2d | 6955 | { |
b98664d3 | 6956 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
6957 | " has children (offset %s) [in module %s]"), |
6958 | sect_offset_str (this_cu->sect_off), | |
6959 | bfd_get_filename (abfd)); | |
6a506a2d | 6960 | } |
c0ab21c2 | 6961 | dwo_unit = lookup_dwo_unit (this_cu, comp_unit_die, dwo_name); |
6a506a2d | 6962 | if (dwo_unit != NULL) |
3019eac3 | 6963 | { |
6a506a2d | 6964 | if (read_cutu_die_from_dwo (this_cu, dwo_unit, |
a2ce51a0 | 6965 | comp_unit_die, NULL, |
c0ab21c2 | 6966 | this, &info_ptr, |
3e225074 | 6967 | &dwo_comp_unit_die, |
c0ab21c2 | 6968 | &m_dwo_abbrev_table) == 0) |
6a506a2d DE |
6969 | { |
6970 | /* Dummy die. */ | |
c0ab21c2 | 6971 | dummy_p = true; |
6a506a2d DE |
6972 | return; |
6973 | } | |
6974 | comp_unit_die = dwo_comp_unit_die; | |
6975 | } | |
6976 | else | |
6977 | { | |
6978 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6979 | the stub. A complaint has already been logged. There's | |
6980 | not much more we can do except pass on the stub DIE to | |
6981 | die_reader_func. We don't want to throw an error on bad | |
6982 | debug info. */ | |
3019eac3 DE |
6983 | } |
6984 | } | |
c0ab21c2 | 6985 | } |
3019eac3 | 6986 | |
6751ebae TT |
6987 | void |
6988 | cutu_reader::keep () | |
c0ab21c2 | 6989 | { |
b0c7bfa9 | 6990 | /* Done, clean up. */ |
6751ebae TT |
6991 | gdb_assert (!dummy_p); |
6992 | if (m_new_cu != NULL) | |
348e048f | 6993 | { |
c0ab21c2 TT |
6994 | struct dwarf2_per_objfile *dwarf2_per_objfile |
6995 | = m_this_cu->dwarf2_per_objfile; | |
fcd3b13d | 6996 | /* Link this CU into read_in_chain. */ |
c0ab21c2 TT |
6997 | m_this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain; |
6998 | dwarf2_per_objfile->read_in_chain = m_this_cu; | |
fcd3b13d | 6999 | /* The chain owns it now. */ |
c0ab21c2 | 7000 | m_new_cu.release (); |
348e048f | 7001 | } |
dee91e82 DE |
7002 | } |
7003 | ||
18a8505e AT |
7004 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
7005 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is | |
7006 | assumed to have already done the lookup to find the DWO file). | |
dee91e82 DE |
7007 | |
7008 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 7009 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
7010 | |
7011 | We fill in THIS_CU->length. | |
7012 | ||
dee91e82 | 7013 | THIS_CU->cu is always freed when done. |
3019eac3 | 7014 | This is done in order to not leave THIS_CU->cu in a state where we have |
18a8505e AT |
7015 | to care whether it refers to the "main" CU or the DWO CU. |
7016 | ||
7017 | When parent_cu is passed, it is used to provide a default value for | |
7018 | str_offsets_base and addr_base from the parent. */ | |
dee91e82 | 7019 | |
c0ab21c2 TT |
7020 | cutu_reader::cutu_reader (struct dwarf2_per_cu_data *this_cu, |
7021 | struct dwarf2_cu *parent_cu, | |
7022 | struct dwo_file *dwo_file) | |
7023 | : die_reader_specs {}, | |
7024 | m_this_cu (this_cu) | |
dee91e82 | 7025 | { |
ed2dc618 | 7026 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_cu->dwarf2_per_objfile; |
dee91e82 | 7027 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
8a0459fd | 7028 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 7029 | bfd *abfd = section->get_bfd_owner (); |
33e80786 | 7030 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 7031 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 7032 | |
b4f54984 | 7033 | if (dwarf_die_debug) |
9d8780f0 | 7034 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 7035 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 7036 | sect_offset_str (this_cu->sect_off)); |
09406207 | 7037 | |
dee91e82 DE |
7038 | gdb_assert (this_cu->cu == NULL); |
7039 | ||
33e80786 DE |
7040 | abbrev_section = (dwo_file != NULL |
7041 | ? &dwo_file->sections.abbrev | |
7042 | : get_abbrev_section_for_cu (this_cu)); | |
7043 | ||
dee91e82 | 7044 | /* This is cheap if the section is already read in. */ |
96b79293 | 7045 | section->read (objfile); |
dee91e82 | 7046 | |
c0ab21c2 | 7047 | m_new_cu.reset (new dwarf2_cu (this_cu)); |
dee91e82 | 7048 | |
9c541725 | 7049 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
ed2dc618 | 7050 | info_ptr = read_and_check_comp_unit_head (dwarf2_per_objfile, |
c0ab21c2 | 7051 | &m_new_cu->header, section, |
4bdcc0c1 | 7052 | abbrev_section, info_ptr, |
43988095 JK |
7053 | (this_cu->is_debug_types |
7054 | ? rcuh_kind::TYPE | |
7055 | : rcuh_kind::COMPILE)); | |
dee91e82 | 7056 | |
18a8505e AT |
7057 | if (parent_cu != nullptr) |
7058 | { | |
c0ab21c2 TT |
7059 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
7060 | m_new_cu->addr_base = parent_cu->addr_base; | |
18a8505e | 7061 | } |
4057dfde | 7062 | this_cu->length = m_new_cu->header.get_length (); |
dee91e82 DE |
7063 | |
7064 | /* Skip dummy compilation units. */ | |
7065 | if (info_ptr >= begin_info_ptr + this_cu->length | |
7066 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c0ab21c2 TT |
7067 | { |
7068 | dummy_p = true; | |
7069 | return; | |
7070 | } | |
72bf9492 | 7071 | |
c0ab21c2 | 7072 | m_abbrev_table_holder |
86de1d91 TT |
7073 | = abbrev_table::read (objfile, abbrev_section, |
7074 | m_new_cu->header.abbrev_sect_off); | |
dee91e82 | 7075 | |
c0ab21c2 TT |
7076 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
7077 | m_abbrev_table_holder.get ()); | |
3e225074 | 7078 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
dee91e82 DE |
7079 | } |
7080 | ||
0018ea6f DE |
7081 | \f |
7082 | /* Type Unit Groups. | |
dee91e82 | 7083 | |
0018ea6f DE |
7084 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
7085 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
7086 | so that all types coming from the same compilation (.o file) are grouped | |
7087 | together. A future step could be to put the types in the same symtab as | |
7088 | the CU the types ultimately came from. */ | |
ff013f42 | 7089 | |
f4dc4d17 DE |
7090 | static hashval_t |
7091 | hash_type_unit_group (const void *item) | |
7092 | { | |
9a3c8263 SM |
7093 | const struct type_unit_group *tu_group |
7094 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 7095 | |
094b34ac | 7096 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 7097 | } |
348e048f DE |
7098 | |
7099 | static int | |
f4dc4d17 | 7100 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 7101 | { |
9a3c8263 SM |
7102 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
7103 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 7104 | |
094b34ac | 7105 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 7106 | } |
348e048f | 7107 | |
f4dc4d17 DE |
7108 | /* Allocate a hash table for type unit groups. */ |
7109 | ||
eaa5fa8b | 7110 | static htab_up |
298e9637 | 7111 | allocate_type_unit_groups_table () |
f4dc4d17 | 7112 | { |
eaa5fa8b TT |
7113 | return htab_up (htab_create_alloc (3, |
7114 | hash_type_unit_group, | |
7115 | eq_type_unit_group, | |
7116 | NULL, xcalloc, xfree)); | |
f4dc4d17 | 7117 | } |
dee91e82 | 7118 | |
f4dc4d17 DE |
7119 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
7120 | partial symtabs. We combine several TUs per psymtab to not let the size | |
7121 | of any one psymtab grow too big. */ | |
7122 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
7123 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 7124 | |
094b34ac | 7125 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
7126 | Create the type_unit_group object used to hold one or more TUs. */ |
7127 | ||
7128 | static struct type_unit_group * | |
094b34ac | 7129 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 7130 | { |
518817b3 SM |
7131 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7132 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 | 7133 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
094b34ac | 7134 | struct dwarf2_per_cu_data *per_cu; |
f4dc4d17 | 7135 | struct type_unit_group *tu_group; |
f4dc4d17 DE |
7136 | |
7137 | tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7138 | struct type_unit_group); | |
094b34ac | 7139 | per_cu = &tu_group->per_cu; |
518817b3 | 7140 | per_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
f4dc4d17 | 7141 | |
094b34ac DE |
7142 | if (dwarf2_per_objfile->using_index) |
7143 | { | |
7144 | per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack, | |
7145 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
7146 | } |
7147 | else | |
7148 | { | |
9c541725 | 7149 | unsigned int line_offset = to_underlying (line_offset_struct); |
891813be | 7150 | dwarf2_psymtab *pst; |
528e1572 | 7151 | std::string name; |
094b34ac DE |
7152 | |
7153 | /* Give the symtab a useful name for debug purposes. */ | |
7154 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
7155 | name = string_printf ("<type_units_%d>", |
7156 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 7157 | else |
528e1572 | 7158 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 7159 | |
528e1572 | 7160 | pst = create_partial_symtab (per_cu, name.c_str ()); |
6d94535f | 7161 | pst->anonymous = true; |
094b34ac | 7162 | } |
f4dc4d17 | 7163 | |
094b34ac | 7164 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7165 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
7166 | |
7167 | return tu_group; | |
7168 | } | |
7169 | ||
094b34ac DE |
7170 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
7171 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
7172 | |
7173 | static struct type_unit_group * | |
ff39bb5e | 7174 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 7175 | { |
518817b3 SM |
7176 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7177 | = cu->per_cu->dwarf2_per_objfile; | |
f4dc4d17 DE |
7178 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
7179 | struct type_unit_group *tu_group; | |
7180 | void **slot; | |
7181 | unsigned int line_offset; | |
7182 | struct type_unit_group type_unit_group_for_lookup; | |
7183 | ||
7184 | if (dwarf2_per_objfile->type_unit_groups == NULL) | |
298e9637 | 7185 | dwarf2_per_objfile->type_unit_groups = allocate_type_unit_groups_table (); |
f4dc4d17 DE |
7186 | |
7187 | /* Do we need to create a new group, or can we use an existing one? */ | |
7188 | ||
7189 | if (stmt_list) | |
7190 | { | |
7191 | line_offset = DW_UNSND (stmt_list); | |
7192 | ++tu_stats->nr_symtab_sharers; | |
7193 | } | |
7194 | else | |
7195 | { | |
7196 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
7197 | We can do various things here like create one group per TU or | |
7198 | spread them over multiple groups to split up the expansion work. | |
7199 | To avoid worst case scenarios (too many groups or too large groups) | |
7200 | we, umm, group them in bunches. */ | |
7201 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
7202 | | (tu_stats->nr_stmt_less_type_units | |
7203 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
7204 | ++tu_stats->nr_stmt_less_type_units; | |
7205 | } | |
7206 | ||
094b34ac | 7207 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 7208 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
eaa5fa8b | 7209 | slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups.get (), |
f4dc4d17 DE |
7210 | &type_unit_group_for_lookup, INSERT); |
7211 | if (*slot != NULL) | |
7212 | { | |
9a3c8263 | 7213 | tu_group = (struct type_unit_group *) *slot; |
f4dc4d17 DE |
7214 | gdb_assert (tu_group != NULL); |
7215 | } | |
7216 | else | |
7217 | { | |
9c541725 | 7218 | sect_offset line_offset_struct = (sect_offset) line_offset; |
094b34ac | 7219 | tu_group = create_type_unit_group (cu, line_offset_struct); |
f4dc4d17 DE |
7220 | *slot = tu_group; |
7221 | ++tu_stats->nr_symtabs; | |
7222 | } | |
7223 | ||
7224 | return tu_group; | |
7225 | } | |
0018ea6f DE |
7226 | \f |
7227 | /* Partial symbol tables. */ | |
7228 | ||
7229 | /* Create a psymtab named NAME and assign it to PER_CU. | |
7230 | ||
7231 | The caller must fill in the following details: | |
7232 | dirname, textlow, texthigh. */ | |
7233 | ||
891813be | 7234 | static dwarf2_psymtab * |
0018ea6f DE |
7235 | create_partial_symtab (struct dwarf2_per_cu_data *per_cu, const char *name) |
7236 | { | |
e3b94546 | 7237 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
891813be | 7238 | dwarf2_psymtab *pst; |
0018ea6f | 7239 | |
891813be | 7240 | pst = new dwarf2_psymtab (name, objfile, 0); |
0018ea6f | 7241 | |
6d94535f | 7242 | pst->psymtabs_addrmap_supported = true; |
0018ea6f DE |
7243 | |
7244 | /* This is the glue that links PST into GDB's symbol API. */ | |
891813be | 7245 | pst->per_cu_data = per_cu; |
0018ea6f DE |
7246 | per_cu->v.psymtab = pst; |
7247 | ||
7248 | return pst; | |
7249 | } | |
7250 | ||
c0ab21c2 | 7251 | /* DIE reader function for process_psymtab_comp_unit. */ |
0018ea6f DE |
7252 | |
7253 | static void | |
7254 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7255 | const gdb_byte *info_ptr, |
0018ea6f | 7256 | struct die_info *comp_unit_die, |
c0ab21c2 | 7257 | enum language pretend_language) |
0018ea6f DE |
7258 | { |
7259 | struct dwarf2_cu *cu = reader->cu; | |
518817b3 | 7260 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 7261 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
0018ea6f | 7262 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
7263 | CORE_ADDR baseaddr; |
7264 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
891813be | 7265 | dwarf2_psymtab *pst; |
3a2b436a | 7266 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 7267 | const char *filename; |
0018ea6f | 7268 | |
0018ea6f DE |
7269 | gdb_assert (! per_cu->is_debug_types); |
7270 | ||
c0ab21c2 | 7271 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
0018ea6f | 7272 | |
0018ea6f | 7273 | /* Allocate a new partial symbol table structure. */ |
2e927613 TV |
7274 | gdb::unique_xmalloc_ptr<char> debug_filename; |
7275 | static const char artificial[] = "<artificial>"; | |
7d45c7c3 KB |
7276 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
7277 | if (filename == NULL) | |
0018ea6f | 7278 | filename = ""; |
2e927613 TV |
7279 | else if (strcmp (filename, artificial) == 0) |
7280 | { | |
7281 | debug_filename.reset (concat (artificial, "@", | |
85f0dd3c TV |
7282 | sect_offset_str (per_cu->sect_off), |
7283 | (char *) NULL)); | |
2e927613 TV |
7284 | filename = debug_filename.get (); |
7285 | } | |
0018ea6f DE |
7286 | |
7287 | pst = create_partial_symtab (per_cu, filename); | |
7288 | ||
7289 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 7290 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 7291 | |
b3b3bada | 7292 | baseaddr = objfile->text_section_offset (); |
0018ea6f DE |
7293 | |
7294 | dwarf2_find_base_address (comp_unit_die, cu); | |
7295 | ||
7296 | /* Possibly set the default values of LOWPC and HIGHPC from | |
7297 | `DW_AT_ranges'. */ | |
3a2b436a JK |
7298 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
7299 | &best_highpc, cu, pst); | |
7300 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
7301 | { |
7302 | CORE_ADDR low | |
7303 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
7304 | - baseaddr); | |
7305 | CORE_ADDR high | |
7306 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
7307 | - baseaddr - 1); | |
7308 | /* Store the contiguous range if it is not empty; it can be | |
7309 | empty for CUs with no code. */ | |
d320c2b5 TT |
7310 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
7311 | low, high, pst); | |
79748972 | 7312 | } |
0018ea6f DE |
7313 | |
7314 | /* Check if comp unit has_children. | |
7315 | If so, read the rest of the partial symbols from this comp unit. | |
7316 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7317 | if (comp_unit_die->has_children) |
0018ea6f DE |
7318 | { |
7319 | struct partial_die_info *first_die; | |
7320 | CORE_ADDR lowpc, highpc; | |
7321 | ||
7322 | lowpc = ((CORE_ADDR) -1); | |
7323 | highpc = ((CORE_ADDR) 0); | |
7324 | ||
7325 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7326 | ||
7327 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 7328 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
7329 | |
7330 | /* If we didn't find a lowpc, set it to highpc to avoid | |
7331 | complaints from `maint check'. */ | |
7332 | if (lowpc == ((CORE_ADDR) -1)) | |
7333 | lowpc = highpc; | |
7334 | ||
7335 | /* If the compilation unit didn't have an explicit address range, | |
7336 | then use the information extracted from its child dies. */ | |
e385593e | 7337 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
7338 | { |
7339 | best_lowpc = lowpc; | |
7340 | best_highpc = highpc; | |
7341 | } | |
7342 | } | |
4ae976d1 | 7343 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7344 | best_lowpc + baseaddr) |
7345 | - baseaddr); | |
4ae976d1 | 7346 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
7347 | best_highpc + baseaddr) |
7348 | - baseaddr); | |
0018ea6f | 7349 | |
8763cede | 7350 | end_psymtab_common (objfile, pst); |
0018ea6f | 7351 | |
ae640021 | 7352 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
7353 | { |
7354 | int i; | |
ae640021 | 7355 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
7356 | |
7357 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
7358 | post-pass. */ | |
7359 | pst->number_of_dependencies = len; | |
a9342b62 TT |
7360 | pst->dependencies |
7361 | = objfile->partial_symtabs->allocate_dependencies (len); | |
ae640021 AB |
7362 | for (i = 0; i < len; ++i) |
7363 | { | |
7364 | pst->dependencies[i] | |
7365 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
7366 | } | |
0018ea6f | 7367 | |
ae640021 | 7368 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
7369 | } |
7370 | ||
7371 | /* Get the list of files included in the current compilation unit, | |
7372 | and build a psymtab for each of them. */ | |
7373 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7374 | ||
b4f54984 | 7375 | if (dwarf_read_debug) |
b926417a TT |
7376 | fprintf_unfiltered (gdb_stdlog, |
7377 | "Psymtab for %s unit @%s: %s - %s" | |
7378 | ", %d global, %d static syms\n", | |
7379 | per_cu->is_debug_types ? "type" : "comp", | |
7380 | sect_offset_str (per_cu->sect_off), | |
7381 | paddress (gdbarch, pst->text_low (objfile)), | |
7382 | paddress (gdbarch, pst->text_high (objfile)), | |
7383 | pst->n_global_syms, pst->n_static_syms); | |
0018ea6f DE |
7384 | } |
7385 | ||
7386 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7387 | Process compilation unit THIS_CU for a psymtab. */ | |
7388 | ||
7389 | static void | |
7390 | process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
135f5437 | 7391 | bool want_partial_unit, |
b93601f3 | 7392 | enum language pretend_language) |
0018ea6f DE |
7393 | { |
7394 | /* If this compilation unit was already read in, free the | |
7395 | cached copy in order to read it in again. This is | |
7396 | necessary because we skipped some symbols when we first | |
7397 | read in the compilation unit (see load_partial_dies). | |
7398 | This problem could be avoided, but the benefit is unclear. */ | |
7399 | if (this_cu->cu != NULL) | |
7400 | free_one_cached_comp_unit (this_cu); | |
7401 | ||
6751ebae | 7402 | cutu_reader reader (this_cu, NULL, 0, false); |
c0ab21c2 | 7403 | |
58990295 TV |
7404 | switch (reader.comp_unit_die->tag) |
7405 | { | |
7406 | case DW_TAG_compile_unit: | |
7407 | this_cu->unit_type = DW_UT_compile; | |
7408 | break; | |
7409 | case DW_TAG_partial_unit: | |
7410 | this_cu->unit_type = DW_UT_partial; | |
7411 | break; | |
7412 | default: | |
7413 | abort (); | |
7414 | } | |
7415 | ||
c0ab21c2 | 7416 | if (reader.dummy_p) |
f1902523 | 7417 | { |
c0ab21c2 | 7418 | /* Nothing. */ |
f1902523 | 7419 | } |
c0ab21c2 | 7420 | else if (this_cu->is_debug_types) |
3e225074 TT |
7421 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
7422 | reader.comp_unit_die); | |
135f5437 TT |
7423 | else if (want_partial_unit |
7424 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) | |
c0ab21c2 TT |
7425 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
7426 | reader.comp_unit_die, | |
c0ab21c2 | 7427 | pretend_language); |
0018ea6f | 7428 | |
58990295 TV |
7429 | this_cu->lang = this_cu->cu->language; |
7430 | ||
0018ea6f | 7431 | /* Age out any secondary CUs. */ |
ed2dc618 | 7432 | age_cached_comp_units (this_cu->dwarf2_per_objfile); |
0018ea6f | 7433 | } |
f4dc4d17 DE |
7434 | |
7435 | /* Reader function for build_type_psymtabs. */ | |
7436 | ||
7437 | static void | |
7438 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7439 | const gdb_byte *info_ptr, |
3e225074 | 7440 | struct die_info *type_unit_die) |
f4dc4d17 | 7441 | { |
ed2dc618 | 7442 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 7443 | = reader->cu->per_cu->dwarf2_per_objfile; |
f4dc4d17 DE |
7444 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7445 | struct dwarf2_cu *cu = reader->cu; | |
7446 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7447 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7448 | struct type_unit_group *tu_group; |
7449 | struct attribute *attr; | |
7450 | struct partial_die_info *first_die; | |
7451 | CORE_ADDR lowpc, highpc; | |
891813be | 7452 | dwarf2_psymtab *pst; |
f4dc4d17 | 7453 | |
0186c6a7 DE |
7454 | gdb_assert (per_cu->is_debug_types); |
7455 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 7456 | |
3e225074 | 7457 | if (! type_unit_die->has_children) |
f4dc4d17 DE |
7458 | return; |
7459 | ||
7460 | attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list); | |
094b34ac | 7461 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7462 | |
df07e2c7 | 7463 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 7464 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 7465 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
7466 | |
7467 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
f4dc4d17 | 7468 | pst = create_partial_symtab (per_cu, ""); |
6d94535f | 7469 | pst->anonymous = true; |
f4dc4d17 DE |
7470 | |
7471 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7472 | ||
7473 | lowpc = (CORE_ADDR) -1; | |
7474 | highpc = (CORE_ADDR) 0; | |
7475 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7476 | ||
8763cede | 7477 | end_psymtab_common (objfile, pst); |
f4dc4d17 DE |
7478 | } |
7479 | ||
73051182 DE |
7480 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7481 | ||
7482 | struct tu_abbrev_offset | |
7483 | { | |
b2bdb8cf SM |
7484 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
7485 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
7486 | {} | |
7487 | ||
7488 | signatured_type *sig_type; | |
73051182 DE |
7489 | sect_offset abbrev_offset; |
7490 | }; | |
7491 | ||
484cf504 | 7492 | /* Helper routine for build_type_psymtabs_1, passed to std::sort. */ |
73051182 | 7493 | |
484cf504 TT |
7494 | static bool |
7495 | sort_tu_by_abbrev_offset (const struct tu_abbrev_offset &a, | |
7496 | const struct tu_abbrev_offset &b) | |
73051182 | 7497 | { |
484cf504 | 7498 | return a.abbrev_offset < b.abbrev_offset; |
73051182 DE |
7499 | } |
7500 | ||
7501 | /* Efficiently read all the type units. | |
7502 | This does the bulk of the work for build_type_psymtabs. | |
7503 | ||
7504 | The efficiency is because we sort TUs by the abbrev table they use and | |
7505 | only read each abbrev table once. In one program there are 200K TUs | |
7506 | sharing 8K abbrev tables. | |
7507 | ||
7508 | The main purpose of this function is to support building the | |
7509 | dwarf2_per_objfile->type_unit_groups table. | |
7510 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we | |
7511 | can collapse the search space by grouping them by stmt_list. | |
7512 | The savings can be significant, in the same program from above the 200K TUs | |
7513 | share 8K stmt_list tables. | |
7514 | ||
7515 | FUNC is expected to call get_type_unit_group, which will create the | |
7516 | struct type_unit_group if necessary and add it to | |
7517 | dwarf2_per_objfile->type_unit_groups. */ | |
7518 | ||
7519 | static void | |
ed2dc618 | 7520 | build_type_psymtabs_1 (struct dwarf2_per_objfile *dwarf2_per_objfile) |
73051182 | 7521 | { |
73051182 | 7522 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; |
685af9cd | 7523 | abbrev_table_up abbrev_table; |
73051182 | 7524 | sect_offset abbrev_offset; |
73051182 DE |
7525 | |
7526 | /* It's up to the caller to not call us multiple times. */ | |
7527 | gdb_assert (dwarf2_per_objfile->type_unit_groups == NULL); | |
7528 | ||
b2bdb8cf | 7529 | if (dwarf2_per_objfile->all_type_units.empty ()) |
73051182 DE |
7530 | return; |
7531 | ||
7532 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7533 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7534 | read each abbrev table in. | |
7535 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7536 | This is simpler and efficient enough for now. | |
7537 | ||
7538 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7539 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7540 | stmt_list value too so in practice this should work well. | |
7541 | ||
7542 | The basic algorithm here is: | |
7543 | ||
7544 | sort TUs by abbrev table | |
7545 | for each TU with same abbrev table: | |
7546 | read abbrev table if first user | |
7547 | read TU top level DIE | |
7548 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7549 | call FUNC */ | |
7550 | ||
b4f54984 | 7551 | if (dwarf_read_debug) |
73051182 DE |
7552 | fprintf_unfiltered (gdb_stdlog, "Building type unit groups ...\n"); |
7553 | ||
7554 | /* Sort in a separate table to maintain the order of all_type_units | |
7555 | for .gdb_index: TU indices directly index all_type_units. */ | |
b2bdb8cf SM |
7556 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
7557 | sorted_by_abbrev.reserve (dwarf2_per_objfile->all_type_units.size ()); | |
7558 | ||
7559 | for (signatured_type *sig_type : dwarf2_per_objfile->all_type_units) | |
7560 | sorted_by_abbrev.emplace_back | |
7561 | (sig_type, read_abbrev_offset (dwarf2_per_objfile, | |
7562 | sig_type->per_cu.section, | |
7563 | sig_type->per_cu.sect_off)); | |
73051182 | 7564 | |
484cf504 TT |
7565 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end (), |
7566 | sort_tu_by_abbrev_offset); | |
73051182 | 7567 | |
9c541725 | 7568 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 7569 | |
b2bdb8cf | 7570 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 7571 | { |
73051182 DE |
7572 | /* Switch to the next abbrev table if necessary. */ |
7573 | if (abbrev_table == NULL | |
b2bdb8cf | 7574 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 7575 | { |
b2bdb8cf | 7576 | abbrev_offset = tu.abbrev_offset; |
73051182 | 7577 | abbrev_table = |
86de1d91 TT |
7578 | abbrev_table::read (dwarf2_per_objfile->objfile, |
7579 | &dwarf2_per_objfile->abbrev, | |
7580 | abbrev_offset); | |
73051182 DE |
7581 | ++tu_stats->nr_uniq_abbrev_tables; |
7582 | } | |
7583 | ||
c0ab21c2 | 7584 | cutu_reader reader (&tu.sig_type->per_cu, abbrev_table.get (), |
6751ebae | 7585 | 0, false); |
c0ab21c2 TT |
7586 | if (!reader.dummy_p) |
7587 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7588 | reader.comp_unit_die); |
73051182 | 7589 | } |
6aa5f3a6 | 7590 | } |
73051182 | 7591 | |
6aa5f3a6 DE |
7592 | /* Print collected type unit statistics. */ |
7593 | ||
7594 | static void | |
ed2dc618 | 7595 | print_tu_stats (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7596 | { |
7597 | struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats; | |
7598 | ||
7599 | fprintf_unfiltered (gdb_stdlog, "Type unit statistics:\n"); | |
b2bdb8cf SM |
7600 | fprintf_unfiltered (gdb_stdlog, " %zu TUs\n", |
7601 | dwarf2_per_objfile->all_type_units.size ()); | |
6aa5f3a6 DE |
7602 | fprintf_unfiltered (gdb_stdlog, " %d uniq abbrev tables\n", |
7603 | tu_stats->nr_uniq_abbrev_tables); | |
7604 | fprintf_unfiltered (gdb_stdlog, " %d symtabs from stmt_list entries\n", | |
7605 | tu_stats->nr_symtabs); | |
7606 | fprintf_unfiltered (gdb_stdlog, " %d symtab sharers\n", | |
7607 | tu_stats->nr_symtab_sharers); | |
7608 | fprintf_unfiltered (gdb_stdlog, " %d type units without a stmt_list\n", | |
7609 | tu_stats->nr_stmt_less_type_units); | |
7610 | fprintf_unfiltered (gdb_stdlog, " %d all_type_units reallocs\n", | |
7611 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7612 | } |
7613 | ||
f4dc4d17 DE |
7614 | /* Traversal function for build_type_psymtabs. */ |
7615 | ||
7616 | static int | |
7617 | build_type_psymtab_dependencies (void **slot, void *info) | |
7618 | { | |
ed2dc618 SM |
7619 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7620 | = (struct dwarf2_per_objfile *) info; | |
f4dc4d17 DE |
7621 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
7622 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; | |
094b34ac | 7623 | struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu; |
891813be | 7624 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
df07e2c7 | 7625 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
7626 | int i; |
7627 | ||
7628 | gdb_assert (len > 0); | |
197400e8 | 7629 | gdb_assert (per_cu->type_unit_group_p ()); |
f4dc4d17 DE |
7630 | |
7631 | pst->number_of_dependencies = len; | |
a9342b62 | 7632 | pst->dependencies = objfile->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 7633 | for (i = 0; i < len; ++i) |
f4dc4d17 | 7634 | { |
df07e2c7 | 7635 | struct signatured_type *iter = tu_group->tus->at (i); |
0186c6a7 DE |
7636 | gdb_assert (iter->per_cu.is_debug_types); |
7637 | pst->dependencies[i] = iter->per_cu.v.psymtab; | |
796a7ff8 | 7638 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7639 | } |
7640 | ||
df07e2c7 AB |
7641 | delete tu_group->tus; |
7642 | tu_group->tus = nullptr; | |
348e048f DE |
7643 | |
7644 | return 1; | |
7645 | } | |
7646 | ||
7647 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7648 | Build partial symbol tables for the .debug_types comp-units. */ | |
7649 | ||
7650 | static void | |
ed2dc618 | 7651 | build_type_psymtabs (struct dwarf2_per_objfile *dwarf2_per_objfile) |
348e048f | 7652 | { |
ed2dc618 | 7653 | if (! create_all_type_units (dwarf2_per_objfile)) |
348e048f DE |
7654 | return; |
7655 | ||
ed2dc618 | 7656 | build_type_psymtabs_1 (dwarf2_per_objfile); |
6aa5f3a6 | 7657 | } |
f4dc4d17 | 7658 | |
6aa5f3a6 DE |
7659 | /* Traversal function for process_skeletonless_type_unit. |
7660 | Read a TU in a DWO file and build partial symbols for it. */ | |
7661 | ||
7662 | static int | |
7663 | process_skeletonless_type_unit (void **slot, void *info) | |
7664 | { | |
7665 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
ed2dc618 SM |
7666 | struct dwarf2_per_objfile *dwarf2_per_objfile |
7667 | = (struct dwarf2_per_objfile *) info; | |
6aa5f3a6 DE |
7668 | struct signatured_type find_entry, *entry; |
7669 | ||
7670 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7671 | ||
7672 | if (dwarf2_per_objfile->signatured_types == NULL) | |
298e9637 | 7673 | dwarf2_per_objfile->signatured_types = allocate_signatured_type_table (); |
6aa5f3a6 DE |
7674 | |
7675 | find_entry.signature = dwo_unit->signature; | |
b0b6a987 TT |
7676 | slot = htab_find_slot (dwarf2_per_objfile->signatured_types.get (), |
7677 | &find_entry, INSERT); | |
6aa5f3a6 DE |
7678 | /* If we've already seen this type there's nothing to do. What's happening |
7679 | is we're doing our own version of comdat-folding here. */ | |
7680 | if (*slot != NULL) | |
7681 | return 1; | |
7682 | ||
7683 | /* This does the job that create_all_type_units would have done for | |
7684 | this TU. */ | |
ed2dc618 SM |
7685 | entry = add_type_unit (dwarf2_per_objfile, dwo_unit->signature, slot); |
7686 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
7687 | *slot = entry; |
7688 | ||
7689 | /* This does the job that build_type_psymtabs_1 would have done. */ | |
6751ebae | 7690 | cutu_reader reader (&entry->per_cu, NULL, 0, false); |
c0ab21c2 TT |
7691 | if (!reader.dummy_p) |
7692 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7693 | reader.comp_unit_die); |
6aa5f3a6 DE |
7694 | |
7695 | return 1; | |
7696 | } | |
7697 | ||
7698 | /* Traversal function for process_skeletonless_type_units. */ | |
7699 | ||
7700 | static int | |
7701 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7702 | { | |
7703 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7704 | ||
7705 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
7706 | htab_traverse_noresize (dwo_file->tus.get (), |
7707 | process_skeletonless_type_unit, info); | |
6aa5f3a6 DE |
7708 | |
7709 | return 1; | |
7710 | } | |
7711 | ||
7712 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7713 | This is needed in case a TU was emitted without its skeleton. | |
7714 | Note: This can't be done until we know what all the DWO files are. */ | |
7715 | ||
7716 | static void | |
ed2dc618 | 7717 | process_skeletonless_type_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
6aa5f3a6 DE |
7718 | { |
7719 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
ed2dc618 | 7720 | if (get_dwp_file (dwarf2_per_objfile) == NULL |
6aa5f3a6 DE |
7721 | && dwarf2_per_objfile->dwo_files != NULL) |
7722 | { | |
51ac9db5 | 7723 | htab_traverse_noresize (dwarf2_per_objfile->dwo_files.get (), |
6aa5f3a6 | 7724 | process_dwo_file_for_skeletonless_type_units, |
ed2dc618 | 7725 | dwarf2_per_objfile); |
6aa5f3a6 | 7726 | } |
348e048f DE |
7727 | } |
7728 | ||
ed2dc618 | 7729 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
7730 | |
7731 | static void | |
ed2dc618 | 7732 | set_partial_user (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 7733 | { |
b76e467d | 7734 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
95554aad | 7735 | { |
891813be | 7736 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
95554aad | 7737 | |
36586728 TT |
7738 | if (pst == NULL) |
7739 | continue; | |
7740 | ||
b76e467d | 7741 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
7742 | { |
7743 | /* Set the 'user' field only if it is not already set. */ | |
7744 | if (pst->dependencies[j]->user == NULL) | |
7745 | pst->dependencies[j]->user = pst; | |
7746 | } | |
7747 | } | |
7748 | } | |
7749 | ||
93311388 DE |
7750 | /* Build the partial symbol table by doing a quick pass through the |
7751 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7752 | |
93311388 | 7753 | static void |
ed2dc618 | 7754 | dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile *dwarf2_per_objfile) |
93311388 | 7755 | { |
ed2dc618 | 7756 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
93311388 | 7757 | |
b4f54984 | 7758 | if (dwarf_read_debug) |
45cfd468 DE |
7759 | { |
7760 | fprintf_unfiltered (gdb_stdlog, "Building psymtabs of objfile %s ...\n", | |
4262abfb | 7761 | objfile_name (objfile)); |
45cfd468 DE |
7762 | } |
7763 | ||
76935768 TT |
7764 | scoped_restore restore_reading_psyms |
7765 | = make_scoped_restore (&dwarf2_per_objfile->reading_partial_symbols, | |
7766 | true); | |
98bfdba5 | 7767 | |
96b79293 | 7768 | dwarf2_per_objfile->info.read (objfile); |
91c24f0a | 7769 | |
93311388 DE |
7770 | /* Any cached compilation units will be linked by the per-objfile |
7771 | read_in_chain. Make sure to free them when we're done. */ | |
11ed8cad | 7772 | free_cached_comp_units freer (dwarf2_per_objfile); |
72bf9492 | 7773 | |
ed2dc618 | 7774 | build_type_psymtabs (dwarf2_per_objfile); |
348e048f | 7775 | |
ed2dc618 | 7776 | create_all_comp_units (dwarf2_per_objfile); |
c906108c | 7777 | |
60606b2c TT |
7778 | /* Create a temporary address map on a temporary obstack. We later |
7779 | copy this to the final obstack. */ | |
8268c778 | 7780 | auto_obstack temp_obstack; |
791afaa2 TT |
7781 | |
7782 | scoped_restore save_psymtabs_addrmap | |
d320c2b5 | 7783 | = make_scoped_restore (&objfile->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 7784 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 7785 | |
b76e467d | 7786 | for (dwarf2_per_cu_data *per_cu : dwarf2_per_objfile->all_comp_units) |
135f5437 | 7787 | process_psymtab_comp_unit (per_cu, false, language_minimal); |
ff013f42 | 7788 | |
6aa5f3a6 | 7789 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
ed2dc618 | 7790 | process_skeletonless_type_units (dwarf2_per_objfile); |
6aa5f3a6 DE |
7791 | |
7792 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
7793 | if (dwarf2_per_objfile->type_unit_groups != NULL) | |
7794 | { | |
eaa5fa8b | 7795 | htab_traverse_noresize (dwarf2_per_objfile->type_unit_groups.get (), |
ed2dc618 | 7796 | build_type_psymtab_dependencies, dwarf2_per_objfile); |
6aa5f3a6 DE |
7797 | } |
7798 | ||
b4f54984 | 7799 | if (dwarf_read_debug) |
ed2dc618 | 7800 | print_tu_stats (dwarf2_per_objfile); |
6aa5f3a6 | 7801 | |
ed2dc618 | 7802 | set_partial_user (dwarf2_per_objfile); |
95554aad | 7803 | |
d320c2b5 TT |
7804 | objfile->partial_symtabs->psymtabs_addrmap |
7805 | = addrmap_create_fixed (objfile->partial_symtabs->psymtabs_addrmap, | |
5923a04c | 7806 | objfile->partial_symtabs->obstack ()); |
791afaa2 TT |
7807 | /* At this point we want to keep the address map. */ |
7808 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7809 | |
b4f54984 | 7810 | if (dwarf_read_debug) |
45cfd468 | 7811 | fprintf_unfiltered (gdb_stdlog, "Done building psymtabs of %s\n", |
4262abfb | 7812 | objfile_name (objfile)); |
ae038cb0 DJ |
7813 | } |
7814 | ||
dee91e82 DE |
7815 | /* Load the partial DIEs for a secondary CU into memory. |
7816 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7817 | |
dee91e82 DE |
7818 | static void |
7819 | load_partial_comp_unit (struct dwarf2_per_cu_data *this_cu) | |
7820 | { | |
6751ebae | 7821 | cutu_reader reader (this_cu, NULL, 1, false); |
c0ab21c2 TT |
7822 | |
7823 | if (!reader.dummy_p) | |
7824 | { | |
7825 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, | |
7826 | language_minimal); | |
7827 | ||
7828 | /* Check if comp unit has_children. | |
7829 | If so, read the rest of the partial symbols from this comp unit. | |
7830 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7831 | if (reader.comp_unit_die->has_children) |
c0ab21c2 | 7832 | load_partial_dies (&reader, reader.info_ptr, 0); |
6751ebae TT |
7833 | |
7834 | reader.keep (); | |
c0ab21c2 | 7835 | } |
ae038cb0 DJ |
7836 | } |
7837 | ||
ae038cb0 | 7838 | static void |
ed2dc618 | 7839 | read_comp_units_from_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
36586728 | 7840 | struct dwarf2_section_info *section, |
f1902523 | 7841 | struct dwarf2_section_info *abbrev_section, |
b76e467d | 7842 | unsigned int is_dwz) |
ae038cb0 | 7843 | { |
d521ce57 | 7844 | const gdb_byte *info_ptr; |
ed2dc618 | 7845 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
be391dca | 7846 | |
b4f54984 | 7847 | if (dwarf_read_debug) |
bf6af496 | 7848 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s\n", |
96b79293 TT |
7849 | section->get_name (), |
7850 | section->get_file_name ()); | |
bf6af496 | 7851 | |
96b79293 | 7852 | section->read (objfile); |
ae038cb0 | 7853 | |
36586728 | 7854 | info_ptr = section->buffer; |
6e70227d | 7855 | |
36586728 | 7856 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7857 | { |
ae038cb0 | 7858 | struct dwarf2_per_cu_data *this_cu; |
ae038cb0 | 7859 | |
9c541725 | 7860 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7861 | |
f1902523 | 7862 | comp_unit_head cu_header; |
ed2dc618 SM |
7863 | read_and_check_comp_unit_head (dwarf2_per_objfile, &cu_header, section, |
7864 | abbrev_section, info_ptr, | |
7865 | rcuh_kind::COMPILE); | |
ae038cb0 DJ |
7866 | |
7867 | /* Save the compilation unit for later lookup. */ | |
f1902523 JK |
7868 | if (cu_header.unit_type != DW_UT_type) |
7869 | { | |
7870 | this_cu = XOBNEW (&objfile->objfile_obstack, | |
7871 | struct dwarf2_per_cu_data); | |
7872 | memset (this_cu, 0, sizeof (*this_cu)); | |
7873 | } | |
7874 | else | |
7875 | { | |
7876 | auto sig_type = XOBNEW (&objfile->objfile_obstack, | |
7877 | struct signatured_type); | |
7878 | memset (sig_type, 0, sizeof (*sig_type)); | |
7879 | sig_type->signature = cu_header.signature; | |
7880 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
7881 | this_cu = &sig_type->per_cu; | |
7882 | } | |
7883 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7884 | this_cu->sect_off = sect_off; |
f1902523 | 7885 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7886 | this_cu->is_dwz = is_dwz; |
e3b94546 | 7887 | this_cu->dwarf2_per_objfile = dwarf2_per_objfile; |
8a0459fd | 7888 | this_cu->section = section; |
ae038cb0 | 7889 | |
b76e467d | 7890 | dwarf2_per_objfile->all_comp_units.push_back (this_cu); |
ae038cb0 DJ |
7891 | |
7892 | info_ptr = info_ptr + this_cu->length; | |
7893 | } | |
36586728 TT |
7894 | } |
7895 | ||
7896 | /* Create a list of all compilation units in OBJFILE. | |
7897 | This is only done for -readnow and building partial symtabs. */ | |
7898 | ||
7899 | static void | |
ed2dc618 | 7900 | create_all_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
36586728 | 7901 | { |
b76e467d | 7902 | gdb_assert (dwarf2_per_objfile->all_comp_units.empty ()); |
ed2dc618 | 7903 | read_comp_units_from_section (dwarf2_per_objfile, &dwarf2_per_objfile->info, |
b76e467d | 7904 | &dwarf2_per_objfile->abbrev, 0); |
36586728 | 7905 | |
b76e467d | 7906 | dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
4db1a1dc | 7907 | if (dwz != NULL) |
ed2dc618 | 7908 | read_comp_units_from_section (dwarf2_per_objfile, &dwz->info, &dwz->abbrev, |
b76e467d | 7909 | 1); |
c906108c SS |
7910 | } |
7911 | ||
5734ee8b | 7912 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7913 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7914 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7915 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7916 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7917 | |
72bf9492 DJ |
7918 | static void |
7919 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7920 | CORE_ADDR *highpc, int set_addrmap, |
7921 | struct dwarf2_cu *cu) | |
c906108c | 7922 | { |
72bf9492 | 7923 | struct partial_die_info *pdi; |
c906108c | 7924 | |
91c24f0a DC |
7925 | /* Now, march along the PDI's, descending into ones which have |
7926 | interesting children but skipping the children of the other ones, | |
7927 | until we reach the end of the compilation unit. */ | |
c906108c | 7928 | |
72bf9492 | 7929 | pdi = first_die; |
91c24f0a | 7930 | |
72bf9492 DJ |
7931 | while (pdi != NULL) |
7932 | { | |
52356b79 | 7933 | pdi->fixup (cu); |
c906108c | 7934 | |
f55ee35c | 7935 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7936 | children, so we need to look at them. Ditto for anonymous |
7937 | enums. */ | |
933c6fe4 | 7938 | |
72bf9492 | 7939 | if (pdi->name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 7940 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
7941 | || pdi->tag == DW_TAG_imported_unit |
7942 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 7943 | { |
72bf9492 | 7944 | switch (pdi->tag) |
c906108c SS |
7945 | { |
7946 | case DW_TAG_subprogram: | |
b1dc1806 | 7947 | case DW_TAG_inlined_subroutine: |
cdc07690 | 7948 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
c906108c | 7949 | break; |
72929c62 | 7950 | case DW_TAG_constant: |
c906108c SS |
7951 | case DW_TAG_variable: |
7952 | case DW_TAG_typedef: | |
91c24f0a | 7953 | case DW_TAG_union_type: |
72bf9492 | 7954 | if (!pdi->is_declaration) |
63d06c5c | 7955 | { |
72bf9492 | 7956 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7957 | } |
7958 | break; | |
c906108c | 7959 | case DW_TAG_class_type: |
680b30c7 | 7960 | case DW_TAG_interface_type: |
c906108c | 7961 | case DW_TAG_structure_type: |
72bf9492 | 7962 | if (!pdi->is_declaration) |
c906108c | 7963 | { |
72bf9492 | 7964 | add_partial_symbol (pdi, cu); |
c906108c | 7965 | } |
b7fee5a3 KS |
7966 | if ((cu->language == language_rust |
7967 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
7968 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
7969 | set_addrmap, cu); | |
c906108c | 7970 | break; |
91c24f0a | 7971 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7972 | if (!pdi->is_declaration) |
7973 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7974 | break; |
7975 | case DW_TAG_base_type: | |
a02abb62 | 7976 | case DW_TAG_subrange_type: |
c906108c | 7977 | /* File scope base type definitions are added to the partial |
c5aa993b | 7978 | symbol table. */ |
72bf9492 | 7979 | add_partial_symbol (pdi, cu); |
c906108c | 7980 | break; |
d9fa45fe | 7981 | case DW_TAG_namespace: |
cdc07690 | 7982 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7983 | break; |
5d7cb8df | 7984 | case DW_TAG_module: |
59c35742 AB |
7985 | if (!pdi->is_declaration) |
7986 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 7987 | break; |
95554aad TT |
7988 | case DW_TAG_imported_unit: |
7989 | { | |
7990 | struct dwarf2_per_cu_data *per_cu; | |
7991 | ||
f4dc4d17 DE |
7992 | /* For now we don't handle imported units in type units. */ |
7993 | if (cu->per_cu->is_debug_types) | |
7994 | { | |
7995 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7996 | " supported in type units [in module %s]"), | |
518817b3 | 7997 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
7998 | } |
7999 | ||
e3b94546 SM |
8000 | per_cu = dwarf2_find_containing_comp_unit |
8001 | (pdi->d.sect_off, pdi->is_dwz, | |
518817b3 | 8002 | cu->per_cu->dwarf2_per_objfile); |
95554aad TT |
8003 | |
8004 | /* Go read the partial unit, if needed. */ | |
8005 | if (per_cu->v.psymtab == NULL) | |
135f5437 | 8006 | process_psymtab_comp_unit (per_cu, true, cu->language); |
95554aad | 8007 | |
ae640021 | 8008 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
8009 | } |
8010 | break; | |
74921315 KS |
8011 | case DW_TAG_imported_declaration: |
8012 | add_partial_symbol (pdi, cu); | |
8013 | break; | |
c906108c SS |
8014 | default: |
8015 | break; | |
8016 | } | |
8017 | } | |
8018 | ||
72bf9492 DJ |
8019 | /* If the die has a sibling, skip to the sibling. */ |
8020 | ||
8021 | pdi = pdi->die_sibling; | |
8022 | } | |
8023 | } | |
8024 | ||
8025 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 8026 | |
72bf9492 | 8027 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 8028 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
8029 | Enumerators are an exception; they use the scope of their parent |
8030 | enumeration type, i.e. the name of the enumeration type is not | |
8031 | prepended to the enumerator. | |
91c24f0a | 8032 | |
72bf9492 DJ |
8033 | There are two complexities. One is DW_AT_specification; in this |
8034 | case "parent" means the parent of the target of the specification, | |
8035 | instead of the direct parent of the DIE. The other is compilers | |
8036 | which do not emit DW_TAG_namespace; in this case we try to guess | |
8037 | the fully qualified name of structure types from their members' | |
8038 | linkage names. This must be done using the DIE's children rather | |
8039 | than the children of any DW_AT_specification target. We only need | |
8040 | to do this for structures at the top level, i.e. if the target of | |
8041 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
8042 | have a parent. */ | |
8043 | ||
8044 | /* Compute the scope prefix associated with PDI's parent, in | |
8045 | compilation unit CU. The result will be allocated on CU's | |
8046 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
8047 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 8048 | static const char * |
72bf9492 DJ |
8049 | partial_die_parent_scope (struct partial_die_info *pdi, |
8050 | struct dwarf2_cu *cu) | |
8051 | { | |
15d034d0 | 8052 | const char *grandparent_scope; |
72bf9492 | 8053 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 8054 | |
72bf9492 DJ |
8055 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
8056 | then this means the parent of the specification DIE. */ | |
8057 | ||
8058 | real_pdi = pdi; | |
72bf9492 | 8059 | while (real_pdi->has_specification) |
fb816e8b | 8060 | { |
122cf0f2 AB |
8061 | auto res = find_partial_die (real_pdi->spec_offset, |
8062 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
8063 | real_pdi = res.pdi; |
8064 | cu = res.cu; | |
8065 | } | |
72bf9492 DJ |
8066 | |
8067 | parent = real_pdi->die_parent; | |
8068 | if (parent == NULL) | |
8069 | return NULL; | |
8070 | ||
8071 | if (parent->scope_set) | |
8072 | return parent->scope; | |
8073 | ||
52356b79 | 8074 | parent->fixup (cu); |
72bf9492 | 8075 | |
10b3939b | 8076 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 8077 | |
acebe513 UW |
8078 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
8079 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
8080 | Work around this problem here. */ | |
8081 | if (cu->language == language_cplus | |
6e70227d | 8082 | && parent->tag == DW_TAG_namespace |
acebe513 UW |
8083 | && strcmp (parent->name, "::") == 0 |
8084 | && grandparent_scope == NULL) | |
8085 | { | |
8086 | parent->scope = NULL; | |
8087 | parent->scope_set = 1; | |
8088 | return NULL; | |
8089 | } | |
8090 | ||
0a4b0913 | 8091 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
8092 | if (pdi->tag == DW_TAG_enumerator) |
8093 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
8094 | parent->scope = grandparent_scope; | |
8095 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 8096 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
8097 | || parent->tag == DW_TAG_structure_type |
8098 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 8099 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 8100 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
8101 | || parent->tag == DW_TAG_enumeration_type |
8102 | || (cu->language == language_fortran | |
8103 | && parent->tag == DW_TAG_subprogram | |
8104 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
8105 | { |
8106 | if (grandparent_scope == NULL) | |
8107 | parent->scope = parent->name; | |
8108 | else | |
3e43a32a MS |
8109 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
8110 | grandparent_scope, | |
f55ee35c | 8111 | parent->name, 0, cu); |
72bf9492 | 8112 | } |
72bf9492 DJ |
8113 | else |
8114 | { | |
8115 | /* FIXME drow/2004-04-01: What should we be doing with | |
8116 | function-local names? For partial symbols, we should probably be | |
8117 | ignoring them. */ | |
fa9c3fa0 TT |
8118 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
8119 | dwarf_tag_name (parent->tag), | |
8120 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 8121 | parent->scope = grandparent_scope; |
c906108c SS |
8122 | } |
8123 | ||
72bf9492 DJ |
8124 | parent->scope_set = 1; |
8125 | return parent->scope; | |
8126 | } | |
8127 | ||
8128 | /* Return the fully scoped name associated with PDI, from compilation unit | |
8129 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 8130 | |
43816ebc | 8131 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
8132 | partial_die_full_name (struct partial_die_info *pdi, |
8133 | struct dwarf2_cu *cu) | |
8134 | { | |
15d034d0 | 8135 | const char *parent_scope; |
72bf9492 | 8136 | |
98bfdba5 PA |
8137 | /* If this is a template instantiation, we can not work out the |
8138 | template arguments from partial DIEs. So, unfortunately, we have | |
8139 | to go through the full DIEs. At least any work we do building | |
8140 | types here will be reused if full symbols are loaded later. */ | |
8141 | if (pdi->has_template_arguments) | |
8142 | { | |
52356b79 | 8143 | pdi->fixup (cu); |
98bfdba5 PA |
8144 | |
8145 | if (pdi->name != NULL && strchr (pdi->name, '<') == NULL) | |
8146 | { | |
8147 | struct die_info *die; | |
8148 | struct attribute attr; | |
8149 | struct dwarf2_cu *ref_cu = cu; | |
8150 | ||
b64f50a1 | 8151 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 8152 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 8153 | attr.form = DW_FORM_ref_addr; |
9c541725 | 8154 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
8155 | die = follow_die_ref (NULL, &attr, &ref_cu); |
8156 | ||
43816ebc | 8157 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
8158 | } |
8159 | } | |
8160 | ||
72bf9492 DJ |
8161 | parent_scope = partial_die_parent_scope (pdi, cu); |
8162 | if (parent_scope == NULL) | |
8163 | return NULL; | |
8164 | else | |
43816ebc TT |
8165 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
8166 | pdi->name, 0, cu)); | |
c906108c SS |
8167 | } |
8168 | ||
8169 | static void | |
72bf9492 | 8170 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 8171 | { |
518817b3 SM |
8172 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8173 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 8174 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 8175 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 8176 | CORE_ADDR addr = 0; |
15d034d0 | 8177 | const char *actual_name = NULL; |
e142c38c DJ |
8178 | CORE_ADDR baseaddr; |
8179 | ||
b3b3bada | 8180 | baseaddr = objfile->text_section_offset (); |
c906108c | 8181 | |
43816ebc TT |
8182 | gdb::unique_xmalloc_ptr<char> built_actual_name |
8183 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 8184 | if (built_actual_name != NULL) |
43816ebc | 8185 | actual_name = built_actual_name.get (); |
63d06c5c | 8186 | |
72bf9492 DJ |
8187 | if (actual_name == NULL) |
8188 | actual_name = pdi->name; | |
8189 | ||
c906108c SS |
8190 | switch (pdi->tag) |
8191 | { | |
b1dc1806 | 8192 | case DW_TAG_inlined_subroutine: |
c906108c | 8193 | case DW_TAG_subprogram: |
79748972 TT |
8194 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
8195 | - baseaddr); | |
0a4b0913 AB |
8196 | if (pdi->is_external |
8197 | || cu->language == language_ada | |
8198 | || (cu->language == language_fortran | |
8199 | && pdi->die_parent != NULL | |
8200 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
8201 | { | |
8202 | /* Normally, only "external" DIEs are part of the global scope. | |
8203 | But in Ada and Fortran, we want to be able to access nested | |
8204 | procedures globally. So all Ada and Fortran subprograms are | |
8205 | stored in the global scope. */ | |
31edb802 | 8206 | add_psymbol_to_list (actual_name, |
15d034d0 | 8207 | built_actual_name != NULL, |
f47fb265 | 8208 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8209 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8210 | psymbol_placement::GLOBAL, |
79748972 TT |
8211 | addr, |
8212 | cu->language, objfile); | |
c906108c SS |
8213 | } |
8214 | else | |
8215 | { | |
31edb802 | 8216 | add_psymbol_to_list (actual_name, |
15d034d0 | 8217 | built_actual_name != NULL, |
f47fb265 | 8218 | VAR_DOMAIN, LOC_BLOCK, |
79748972 | 8219 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8220 | psymbol_placement::STATIC, |
1762568f | 8221 | addr, cu->language, objfile); |
c906108c | 8222 | } |
0c1b455e TT |
8223 | |
8224 | if (pdi->main_subprogram && actual_name != NULL) | |
8225 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 8226 | break; |
72929c62 | 8227 | case DW_TAG_constant: |
31edb802 | 8228 | add_psymbol_to_list (actual_name, |
75aedd27 TT |
8229 | built_actual_name != NULL, VAR_DOMAIN, LOC_STATIC, |
8230 | -1, (pdi->is_external | |
8231 | ? psymbol_placement::GLOBAL | |
8232 | : psymbol_placement::STATIC), | |
8233 | 0, cu->language, objfile); | |
72929c62 | 8234 | break; |
c906108c | 8235 | case DW_TAG_variable: |
95554aad TT |
8236 | if (pdi->d.locdesc) |
8237 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 8238 | |
95554aad | 8239 | if (pdi->d.locdesc |
caac4577 JG |
8240 | && addr == 0 |
8241 | && !dwarf2_per_objfile->has_section_at_zero) | |
8242 | { | |
8243 | /* A global or static variable may also have been stripped | |
8244 | out by the linker if unused, in which case its address | |
8245 | will be nullified; do not add such variables into partial | |
8246 | symbol table then. */ | |
8247 | } | |
8248 | else if (pdi->is_external) | |
c906108c SS |
8249 | { |
8250 | /* Global Variable. | |
8251 | Don't enter into the minimal symbol tables as there is | |
8252 | a minimal symbol table entry from the ELF symbols already. | |
8253 | Enter into partial symbol table if it has a location | |
8254 | descriptor or a type. | |
8255 | If the location descriptor is missing, new_symbol will create | |
8256 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
8257 | be determined from the minimal symbol table whenever the variable | |
8258 | is referenced. | |
8259 | The address for the partial symbol table entry is not | |
8260 | used by GDB, but it comes in handy for debugging partial symbol | |
8261 | table building. */ | |
8262 | ||
95554aad | 8263 | if (pdi->d.locdesc || pdi->has_type) |
31edb802 | 8264 | add_psymbol_to_list (actual_name, |
15d034d0 | 8265 | built_actual_name != NULL, |
f47fb265 | 8266 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8267 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8268 | psymbol_placement::GLOBAL, |
79748972 | 8269 | addr, cu->language, objfile); |
c906108c SS |
8270 | } |
8271 | else | |
8272 | { | |
ff908ebf AW |
8273 | int has_loc = pdi->d.locdesc != NULL; |
8274 | ||
8275 | /* Static Variable. Skip symbols whose value we cannot know (those | |
8276 | without location descriptors or constant values). */ | |
8277 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 8278 | return; |
ff908ebf | 8279 | |
31edb802 | 8280 | add_psymbol_to_list (actual_name, |
15d034d0 | 8281 | built_actual_name != NULL, |
f47fb265 | 8282 | VAR_DOMAIN, LOC_STATIC, |
79748972 | 8283 | SECT_OFF_TEXT (objfile), |
75aedd27 | 8284 | psymbol_placement::STATIC, |
79748972 | 8285 | has_loc ? addr : 0, |
f47fb265 | 8286 | cu->language, objfile); |
c906108c SS |
8287 | } |
8288 | break; | |
8289 | case DW_TAG_typedef: | |
8290 | case DW_TAG_base_type: | |
a02abb62 | 8291 | case DW_TAG_subrange_type: |
31edb802 | 8292 | add_psymbol_to_list (actual_name, |
15d034d0 | 8293 | built_actual_name != NULL, |
79748972 | 8294 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8295 | psymbol_placement::STATIC, |
1762568f | 8296 | 0, cu->language, objfile); |
c906108c | 8297 | break; |
74921315 | 8298 | case DW_TAG_imported_declaration: |
72bf9492 | 8299 | case DW_TAG_namespace: |
31edb802 | 8300 | add_psymbol_to_list (actual_name, |
15d034d0 | 8301 | built_actual_name != NULL, |
79748972 | 8302 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 8303 | psymbol_placement::GLOBAL, |
1762568f | 8304 | 0, cu->language, objfile); |
72bf9492 | 8305 | break; |
530e8392 | 8306 | case DW_TAG_module: |
a5fd13a9 BH |
8307 | /* With Fortran 77 there might be a "BLOCK DATA" module |
8308 | available without any name. If so, we skip the module as it | |
8309 | doesn't bring any value. */ | |
8310 | if (actual_name != nullptr) | |
31edb802 | 8311 | add_psymbol_to_list (actual_name, |
a5fd13a9 BH |
8312 | built_actual_name != NULL, |
8313 | MODULE_DOMAIN, LOC_TYPEDEF, -1, | |
8314 | psymbol_placement::GLOBAL, | |
8315 | 0, cu->language, objfile); | |
530e8392 | 8316 | break; |
c906108c | 8317 | case DW_TAG_class_type: |
680b30c7 | 8318 | case DW_TAG_interface_type: |
c906108c SS |
8319 | case DW_TAG_structure_type: |
8320 | case DW_TAG_union_type: | |
8321 | case DW_TAG_enumeration_type: | |
fa4028e9 JB |
8322 | /* Skip external references. The DWARF standard says in the section |
8323 | about "Structure, Union, and Class Type Entries": "An incomplete | |
8324 | structure, union or class type is represented by a structure, | |
8325 | union or class entry that does not have a byte size attribute | |
8326 | and that has a DW_AT_declaration attribute." */ | |
8327 | if (!pdi->has_byte_size && pdi->is_declaration) | |
43816ebc | 8328 | return; |
fa4028e9 | 8329 | |
63d06c5c DC |
8330 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
8331 | static vs. global. */ | |
31edb802 | 8332 | add_psymbol_to_list (actual_name, |
15d034d0 | 8333 | built_actual_name != NULL, |
79748972 | 8334 | STRUCT_DOMAIN, LOC_TYPEDEF, -1, |
9c37b5ae | 8335 | cu->language == language_cplus |
75aedd27 TT |
8336 | ? psymbol_placement::GLOBAL |
8337 | : psymbol_placement::STATIC, | |
1762568f | 8338 | 0, cu->language, objfile); |
c906108c | 8339 | |
c906108c SS |
8340 | break; |
8341 | case DW_TAG_enumerator: | |
31edb802 | 8342 | add_psymbol_to_list (actual_name, |
15d034d0 | 8343 | built_actual_name != NULL, |
79748972 | 8344 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 8345 | cu->language == language_cplus |
75aedd27 TT |
8346 | ? psymbol_placement::GLOBAL |
8347 | : psymbol_placement::STATIC, | |
1762568f | 8348 | 0, cu->language, objfile); |
c906108c SS |
8349 | break; |
8350 | default: | |
8351 | break; | |
8352 | } | |
8353 | } | |
8354 | ||
5c4e30ca DC |
8355 | /* Read a partial die corresponding to a namespace; also, add a symbol |
8356 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8357 | the name of the enclosing namespace. */ | |
91c24f0a | 8358 | |
72bf9492 DJ |
8359 | static void |
8360 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8361 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8362 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8363 | { |
72bf9492 | 8364 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8365 | |
72bf9492 | 8366 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8367 | |
8368 | /* Now scan partial symbols in that namespace. */ | |
8369 | ||
91c24f0a | 8370 | if (pdi->has_children) |
cdc07690 | 8371 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8372 | } |
8373 | ||
5d7cb8df JK |
8374 | /* Read a partial die corresponding to a Fortran module. */ |
8375 | ||
8376 | static void | |
8377 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8378 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8379 | { |
530e8392 KB |
8380 | /* Add a symbol for the namespace. */ |
8381 | ||
8382 | add_partial_symbol (pdi, cu); | |
8383 | ||
f55ee35c | 8384 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8385 | |
8386 | if (pdi->has_children) | |
cdc07690 | 8387 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8388 | } |
8389 | ||
b1dc1806 XR |
8390 | /* Read a partial die corresponding to a subprogram or an inlined |
8391 | subprogram and create a partial symbol for that subprogram. | |
8392 | When the CU language allows it, this routine also defines a partial | |
8393 | symbol for each nested subprogram that this subprogram contains. | |
8394 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
8395 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 8396 | |
cdc07690 YQ |
8397 | PDI may also be a lexical block, in which case we simply search |
8398 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8399 | Again, this is only performed when the CU language allows this |
8400 | type of definitions. */ | |
8401 | ||
8402 | static void | |
8403 | add_partial_subprogram (struct partial_die_info *pdi, | |
8404 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8405 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 8406 | { |
b1dc1806 | 8407 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
8408 | { |
8409 | if (pdi->has_pc_info) | |
8410 | { | |
8411 | if (pdi->lowpc < *lowpc) | |
8412 | *lowpc = pdi->lowpc; | |
8413 | if (pdi->highpc > *highpc) | |
8414 | *highpc = pdi->highpc; | |
cdc07690 | 8415 | if (set_addrmap) |
5734ee8b | 8416 | { |
518817b3 | 8417 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a MR |
8418 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
8419 | CORE_ADDR baseaddr; | |
b926417a TT |
8420 | CORE_ADDR this_highpc; |
8421 | CORE_ADDR this_lowpc; | |
5734ee8b | 8422 | |
b3b3bada | 8423 | baseaddr = objfile->text_section_offset (); |
b926417a TT |
8424 | this_lowpc |
8425 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8426 | pdi->lowpc + baseaddr) | |
8427 | - baseaddr); | |
8428 | this_highpc | |
8429 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8430 | pdi->highpc + baseaddr) | |
8431 | - baseaddr); | |
d320c2b5 | 8432 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
b926417a | 8433 | this_lowpc, this_highpc - 1, |
9291a0cd | 8434 | cu->per_cu->v.psymtab); |
5734ee8b | 8435 | } |
481860b3 GB |
8436 | } |
8437 | ||
8438 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8439 | { | |
bc30ff58 | 8440 | if (!pdi->is_declaration) |
e8d05480 JB |
8441 | /* Ignore subprogram DIEs that do not have a name, they are |
8442 | illegal. Do not emit a complaint at this point, we will | |
8443 | do so when we convert this psymtab into a symtab. */ | |
8444 | if (pdi->name) | |
8445 | add_partial_symbol (pdi, cu); | |
bc30ff58 JB |
8446 | } |
8447 | } | |
6e70227d | 8448 | |
bc30ff58 JB |
8449 | if (! pdi->has_children) |
8450 | return; | |
8451 | ||
0a4b0913 | 8452 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
8453 | { |
8454 | pdi = pdi->die_child; | |
8455 | while (pdi != NULL) | |
8456 | { | |
52356b79 | 8457 | pdi->fixup (cu); |
bc30ff58 | 8458 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 8459 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 8460 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 8461 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8462 | pdi = pdi->die_sibling; |
8463 | } | |
8464 | } | |
8465 | } | |
8466 | ||
91c24f0a DC |
8467 | /* Read a partial die corresponding to an enumeration type. */ |
8468 | ||
72bf9492 DJ |
8469 | static void |
8470 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8471 | struct dwarf2_cu *cu) | |
91c24f0a | 8472 | { |
72bf9492 | 8473 | struct partial_die_info *pdi; |
91c24f0a DC |
8474 | |
8475 | if (enum_pdi->name != NULL) | |
72bf9492 DJ |
8476 | add_partial_symbol (enum_pdi, cu); |
8477 | ||
8478 | pdi = enum_pdi->die_child; | |
8479 | while (pdi) | |
91c24f0a | 8480 | { |
72bf9492 | 8481 | if (pdi->tag != DW_TAG_enumerator || pdi->name == NULL) |
b98664d3 | 8482 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 8483 | else |
72bf9492 DJ |
8484 | add_partial_symbol (pdi, cu); |
8485 | pdi = pdi->die_sibling; | |
91c24f0a | 8486 | } |
91c24f0a DC |
8487 | } |
8488 | ||
6caca83c CC |
8489 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8490 | ||
8491 | static unsigned int | |
d521ce57 | 8492 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8493 | { |
8494 | unsigned int bytes_read; | |
8495 | ||
8496 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8497 | } | |
8498 | ||
685af9cd TT |
8499 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
8500 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
8501 | ||
4bb7a0a7 DJ |
8502 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
8503 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8504 | the initial number. */ | |
8505 | ||
8506 | static struct abbrev_info * | |
685af9cd TT |
8507 | peek_die_abbrev (const die_reader_specs &reader, |
8508 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 8509 | { |
685af9cd | 8510 | dwarf2_cu *cu = reader.cu; |
518817b3 | 8511 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
685af9cd TT |
8512 | unsigned int abbrev_number |
8513 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
8514 | |
8515 | if (abbrev_number == 0) | |
8516 | return NULL; | |
8517 | ||
685af9cd | 8518 | abbrev_info *abbrev = reader.abbrev_table->lookup_abbrev (abbrev_number); |
4bb7a0a7 DJ |
8519 | if (!abbrev) |
8520 | { | |
422b9917 | 8521 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 8522 | " at offset %s [in module %s]"), |
422b9917 | 8523 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 8524 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8525 | } |
8526 | ||
8527 | return abbrev; | |
8528 | } | |
8529 | ||
93311388 DE |
8530 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8531 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8532 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8533 | ||
d521ce57 TT |
8534 | static const gdb_byte * |
8535 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8536 | { |
4bb7a0a7 DJ |
8537 | while (1) |
8538 | { | |
685af9cd TT |
8539 | unsigned int bytes_read; |
8540 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); | |
8541 | ||
4bb7a0a7 DJ |
8542 | if (abbrev == NULL) |
8543 | return info_ptr + bytes_read; | |
8544 | else | |
dee91e82 | 8545 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8546 | } |
8547 | } | |
8548 | ||
93311388 DE |
8549 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8550 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8551 | abbrev corresponding to that skipped uleb128 should be passed in |
8552 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8553 | children. */ | |
8554 | ||
d521ce57 TT |
8555 | static const gdb_byte * |
8556 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
dee91e82 | 8557 | struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8558 | { |
8559 | unsigned int bytes_read; | |
8560 | struct attribute attr; | |
dee91e82 DE |
8561 | bfd *abfd = reader->abfd; |
8562 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8563 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8564 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8565 | unsigned int form, i; |
8566 | ||
8567 | for (i = 0; i < abbrev->num_attrs; i++) | |
8568 | { | |
8569 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8570 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8571 | { | |
18a8505e AT |
8572 | bool ignored; |
8573 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr, | |
8574 | &ignored); | |
4bb7a0a7 | 8575 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 8576 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 8577 | else |
b9502d3f | 8578 | { |
9c541725 PA |
8579 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
8580 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
8581 | |
8582 | if (sibling_ptr < info_ptr) | |
b98664d3 | 8583 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 8584 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 8585 | reader->die_section->overflow_complaint (); |
b9502d3f WN |
8586 | else |
8587 | return sibling_ptr; | |
8588 | } | |
4bb7a0a7 DJ |
8589 | } |
8590 | ||
8591 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8592 | form = abbrev->attrs[i].form; | |
8593 | skip_attribute: | |
8594 | switch (form) | |
8595 | { | |
4bb7a0a7 | 8596 | case DW_FORM_ref_addr: |
ae411497 TT |
8597 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8598 | and later it is offset sized. */ | |
8599 | if (cu->header.version == 2) | |
8600 | info_ptr += cu->header.addr_size; | |
8601 | else | |
8602 | info_ptr += cu->header.offset_size; | |
8603 | break; | |
36586728 TT |
8604 | case DW_FORM_GNU_ref_alt: |
8605 | info_ptr += cu->header.offset_size; | |
8606 | break; | |
ae411497 | 8607 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8608 | info_ptr += cu->header.addr_size; |
8609 | break; | |
8610 | case DW_FORM_data1: | |
8611 | case DW_FORM_ref1: | |
8612 | case DW_FORM_flag: | |
8fe0f950 | 8613 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
8614 | info_ptr += 1; |
8615 | break; | |
2dc7f7b3 | 8616 | case DW_FORM_flag_present: |
43988095 | 8617 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8618 | break; |
4bb7a0a7 DJ |
8619 | case DW_FORM_data2: |
8620 | case DW_FORM_ref2: | |
8fe0f950 | 8621 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
8622 | info_ptr += 2; |
8623 | break; | |
8fe0f950 AT |
8624 | case DW_FORM_strx3: |
8625 | info_ptr += 3; | |
8626 | break; | |
4bb7a0a7 DJ |
8627 | case DW_FORM_data4: |
8628 | case DW_FORM_ref4: | |
8fe0f950 | 8629 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
8630 | info_ptr += 4; |
8631 | break; | |
8632 | case DW_FORM_data8: | |
8633 | case DW_FORM_ref8: | |
55f1336d | 8634 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8635 | info_ptr += 8; |
8636 | break; | |
0224619f JK |
8637 | case DW_FORM_data16: |
8638 | info_ptr += 16; | |
8639 | break; | |
4bb7a0a7 | 8640 | case DW_FORM_string: |
9b1c24c8 | 8641 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8642 | info_ptr += bytes_read; |
8643 | break; | |
2dc7f7b3 | 8644 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8645 | case DW_FORM_strp: |
36586728 | 8646 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8647 | info_ptr += cu->header.offset_size; |
8648 | break; | |
2dc7f7b3 | 8649 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8650 | case DW_FORM_block: |
8651 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8652 | info_ptr += bytes_read; | |
8653 | break; | |
8654 | case DW_FORM_block1: | |
8655 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8656 | break; | |
8657 | case DW_FORM_block2: | |
8658 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8659 | break; | |
8660 | case DW_FORM_block4: | |
8661 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8662 | break; | |
336d760d | 8663 | case DW_FORM_addrx: |
cf532bd1 | 8664 | case DW_FORM_strx: |
4bb7a0a7 DJ |
8665 | case DW_FORM_sdata: |
8666 | case DW_FORM_udata: | |
8667 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8668 | case DW_FORM_GNU_addr_index: |
8669 | case DW_FORM_GNU_str_index: | |
18a8505e | 8670 | case DW_FORM_rnglistx: |
d521ce57 | 8671 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8672 | break; |
8673 | case DW_FORM_indirect: | |
8674 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8675 | info_ptr += bytes_read; | |
8676 | /* We need to continue parsing from here, so just go back to | |
8677 | the top. */ | |
8678 | goto skip_attribute; | |
8679 | ||
8680 | default: | |
3e43a32a MS |
8681 | error (_("Dwarf Error: Cannot handle %s " |
8682 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8683 | dwarf_form_name (form), |
8684 | bfd_get_filename (abfd)); | |
8685 | } | |
8686 | } | |
8687 | ||
8688 | if (abbrev->has_children) | |
dee91e82 | 8689 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8690 | else |
8691 | return info_ptr; | |
8692 | } | |
8693 | ||
93311388 | 8694 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8695 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8696 | |
d521ce57 | 8697 | static const gdb_byte * |
dee91e82 DE |
8698 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8699 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8700 | const gdb_byte *info_ptr) |
91c24f0a DC |
8701 | { |
8702 | /* Do we know the sibling already? */ | |
72bf9492 | 8703 | |
91c24f0a DC |
8704 | if (orig_pdi->sibling) |
8705 | return orig_pdi->sibling; | |
8706 | ||
8707 | /* Are there any children to deal with? */ | |
8708 | ||
8709 | if (!orig_pdi->has_children) | |
8710 | return info_ptr; | |
8711 | ||
4bb7a0a7 | 8712 | /* Skip the children the long way. */ |
91c24f0a | 8713 | |
dee91e82 | 8714 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8715 | } |
8716 | ||
257e7a09 | 8717 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8718 | not NULL. */ |
c906108c | 8719 | |
891813be TT |
8720 | void |
8721 | dwarf2_psymtab::read_symtab (struct objfile *objfile) | |
c906108c | 8722 | { |
ed2dc618 SM |
8723 | struct dwarf2_per_objfile *dwarf2_per_objfile |
8724 | = get_dwarf2_per_objfile (objfile); | |
8725 | ||
077cbab2 TT |
8726 | gdb_assert (!readin); |
8727 | /* If this psymtab is constructed from a debug-only objfile, the | |
8728 | has_section_at_zero flag will not necessarily be correct. We | |
8729 | can get the correct value for this flag by looking at the data | |
8730 | associated with the (presumably stripped) associated objfile. */ | |
8731 | if (objfile->separate_debug_objfile_backlink) | |
c906108c | 8732 | { |
077cbab2 TT |
8733 | struct dwarf2_per_objfile *dpo_backlink |
8734 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); | |
c906108c | 8735 | |
077cbab2 TT |
8736 | dwarf2_per_objfile->has_section_at_zero |
8737 | = dpo_backlink->has_section_at_zero; | |
8738 | } | |
98bfdba5 | 8739 | |
8566b89b | 8740 | expand_psymtab (objfile); |
95554aad | 8741 | |
ed2dc618 | 8742 | process_cu_includes (dwarf2_per_objfile); |
c906108c | 8743 | } |
9cdd5dbd DE |
8744 | \f |
8745 | /* Reading in full CUs. */ | |
c906108c | 8746 | |
10b3939b DJ |
8747 | /* Add PER_CU to the queue. */ |
8748 | ||
8749 | static void | |
95554aad TT |
8750 | queue_comp_unit (struct dwarf2_per_cu_data *per_cu, |
8751 | enum language pretend_language) | |
10b3939b | 8752 | { |
10b3939b | 8753 | per_cu->queued = 1; |
39856def | 8754 | per_cu->dwarf2_per_objfile->queue.emplace (per_cu, pretend_language); |
10b3939b DJ |
8755 | } |
8756 | ||
89e63ee4 DE |
8757 | /* If PER_CU is not yet queued, add it to the queue. |
8758 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a | |
8759 | dependency. | |
0907af0c | 8760 | The result is non-zero if PER_CU was queued, otherwise the result is zero |
69d751e3 DE |
8761 | meaning either PER_CU is already queued or it is already loaded. |
8762 | ||
8763 | N.B. There is an invariant here that if a CU is queued then it is loaded. | |
8764 | The caller is required to load PER_CU if we return non-zero. */ | |
0907af0c DE |
8765 | |
8766 | static int | |
89e63ee4 | 8767 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
0907af0c DE |
8768 | struct dwarf2_per_cu_data *per_cu, |
8769 | enum language pretend_language) | |
8770 | { | |
8771 | /* We may arrive here during partial symbol reading, if we need full | |
8772 | DIEs to process an unusual case (e.g. template arguments). Do | |
8773 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
ed2dc618 | 8774 | if (per_cu->dwarf2_per_objfile->reading_partial_symbols) |
0907af0c DE |
8775 | { |
8776 | if (per_cu->cu == NULL || per_cu->cu->dies == NULL) | |
8777 | return 1; | |
8778 | return 0; | |
8779 | } | |
8780 | ||
8781 | /* Mark the dependence relation so that we don't flush PER_CU | |
8782 | too early. */ | |
89e63ee4 DE |
8783 | if (dependent_cu != NULL) |
8784 | dwarf2_add_dependence (dependent_cu, per_cu); | |
0907af0c DE |
8785 | |
8786 | /* If it's already on the queue, we have nothing to do. */ | |
8787 | if (per_cu->queued) | |
8788 | return 0; | |
8789 | ||
8790 | /* If the compilation unit is already loaded, just mark it as | |
8791 | used. */ | |
8792 | if (per_cu->cu != NULL) | |
8793 | { | |
8794 | per_cu->cu->last_used = 0; | |
8795 | return 0; | |
8796 | } | |
8797 | ||
8798 | /* Add it to the queue. */ | |
8799 | queue_comp_unit (per_cu, pretend_language); | |
8800 | ||
8801 | return 1; | |
8802 | } | |
8803 | ||
10b3939b DJ |
8804 | /* Process the queue. */ |
8805 | ||
8806 | static void | |
ed2dc618 | 8807 | process_queue (struct dwarf2_per_objfile *dwarf2_per_objfile) |
10b3939b | 8808 | { |
b4f54984 | 8809 | if (dwarf_read_debug) |
45cfd468 DE |
8810 | { |
8811 | fprintf_unfiltered (gdb_stdlog, | |
8812 | "Expanding one or more symtabs of objfile %s ...\n", | |
4262abfb | 8813 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 DE |
8814 | } |
8815 | ||
03dd20cc DJ |
8816 | /* The queue starts out with one item, but following a DIE reference |
8817 | may load a new CU, adding it to the end of the queue. */ | |
39856def | 8818 | while (!dwarf2_per_objfile->queue.empty ()) |
10b3939b | 8819 | { |
39856def TT |
8820 | dwarf2_queue_item &item = dwarf2_per_objfile->queue.front (); |
8821 | ||
cc12ce38 | 8822 | if ((dwarf2_per_objfile->using_index |
39856def TT |
8823 | ? !item.per_cu->v.quick->compunit_symtab |
8824 | : (item.per_cu->v.psymtab && !item.per_cu->v.psymtab->readin)) | |
cc12ce38 | 8825 | /* Skip dummy CUs. */ |
39856def | 8826 | && item.per_cu->cu != NULL) |
f4dc4d17 | 8827 | { |
39856def | 8828 | struct dwarf2_per_cu_data *per_cu = item.per_cu; |
73be47f5 | 8829 | unsigned int debug_print_threshold; |
247f5c4f | 8830 | char buf[100]; |
f4dc4d17 | 8831 | |
247f5c4f | 8832 | if (per_cu->is_debug_types) |
f4dc4d17 | 8833 | { |
247f5c4f DE |
8834 | struct signatured_type *sig_type = |
8835 | (struct signatured_type *) per_cu; | |
8836 | ||
9d8780f0 | 8837 | sprintf (buf, "TU %s at offset %s", |
73be47f5 | 8838 | hex_string (sig_type->signature), |
9d8780f0 | 8839 | sect_offset_str (per_cu->sect_off)); |
73be47f5 DE |
8840 | /* There can be 100s of TUs. |
8841 | Only print them in verbose mode. */ | |
8842 | debug_print_threshold = 2; | |
f4dc4d17 | 8843 | } |
247f5c4f | 8844 | else |
73be47f5 | 8845 | { |
9d8780f0 SM |
8846 | sprintf (buf, "CU at offset %s", |
8847 | sect_offset_str (per_cu->sect_off)); | |
73be47f5 DE |
8848 | debug_print_threshold = 1; |
8849 | } | |
247f5c4f | 8850 | |
b4f54984 | 8851 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8852 | fprintf_unfiltered (gdb_stdlog, "Expanding symtab of %s\n", buf); |
f4dc4d17 DE |
8853 | |
8854 | if (per_cu->is_debug_types) | |
39856def | 8855 | process_full_type_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8856 | else |
39856def | 8857 | process_full_comp_unit (per_cu, item.pretend_language); |
f4dc4d17 | 8858 | |
b4f54984 | 8859 | if (dwarf_read_debug >= debug_print_threshold) |
247f5c4f | 8860 | fprintf_unfiltered (gdb_stdlog, "Done expanding %s\n", buf); |
f4dc4d17 | 8861 | } |
10b3939b | 8862 | |
39856def TT |
8863 | item.per_cu->queued = 0; |
8864 | dwarf2_per_objfile->queue.pop (); | |
10b3939b DJ |
8865 | } |
8866 | ||
b4f54984 | 8867 | if (dwarf_read_debug) |
45cfd468 DE |
8868 | { |
8869 | fprintf_unfiltered (gdb_stdlog, "Done expanding symtabs of %s.\n", | |
4262abfb | 8870 | objfile_name (dwarf2_per_objfile->objfile)); |
45cfd468 | 8871 | } |
10b3939b DJ |
8872 | } |
8873 | ||
10b3939b DJ |
8874 | /* Read in full symbols for PST, and anything it depends on. */ |
8875 | ||
8566b89b TT |
8876 | void |
8877 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) | |
c906108c | 8878 | { |
8566b89b | 8879 | if (readin) |
95554aad TT |
8880 | return; |
8881 | ||
0494dbec | 8882 | read_dependencies (objfile); |
aaa75496 | 8883 | |
b83470bf TT |
8884 | dw2_do_instantiate_symtab (per_cu_data, false); |
8885 | gdb_assert (get_compunit_symtab () != nullptr); | |
10b3939b DJ |
8886 | } |
8887 | ||
dee91e82 DE |
8888 | /* Trivial hash function for die_info: the hash value of a DIE |
8889 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8890 | |
dee91e82 DE |
8891 | static hashval_t |
8892 | die_hash (const void *item) | |
10b3939b | 8893 | { |
9a3c8263 | 8894 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8895 | |
9c541725 | 8896 | return to_underlying (die->sect_off); |
dee91e82 | 8897 | } |
63d06c5c | 8898 | |
dee91e82 DE |
8899 | /* Trivial comparison function for die_info structures: two DIEs |
8900 | are equal if they have the same offset. */ | |
98bfdba5 | 8901 | |
dee91e82 DE |
8902 | static int |
8903 | die_eq (const void *item_lhs, const void *item_rhs) | |
8904 | { | |
9a3c8263 SM |
8905 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8906 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8907 | |
9c541725 | 8908 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8909 | } |
c906108c | 8910 | |
c0ab21c2 | 8911 | /* Load the DIEs associated with PER_CU into memory. */ |
c906108c | 8912 | |
dee91e82 | 8913 | static void |
c0ab21c2 TT |
8914 | load_full_comp_unit (struct dwarf2_per_cu_data *this_cu, |
8915 | bool skip_partial, | |
8916 | enum language pretend_language) | |
dee91e82 | 8917 | { |
c0ab21c2 TT |
8918 | gdb_assert (! this_cu->is_debug_types); |
8919 | ||
6751ebae | 8920 | cutu_reader reader (this_cu, NULL, 1, skip_partial); |
c0ab21c2 TT |
8921 | if (reader.dummy_p) |
8922 | return; | |
8923 | ||
8924 | struct dwarf2_cu *cu = reader.cu; | |
8925 | const gdb_byte *info_ptr = reader.info_ptr; | |
6caca83c | 8926 | |
dee91e82 DE |
8927 | gdb_assert (cu->die_hash == NULL); |
8928 | cu->die_hash = | |
8929 | htab_create_alloc_ex (cu->header.length / 12, | |
8930 | die_hash, | |
8931 | die_eq, | |
8932 | NULL, | |
8933 | &cu->comp_unit_obstack, | |
8934 | hashtab_obstack_allocate, | |
8935 | dummy_obstack_deallocate); | |
e142c38c | 8936 | |
3e225074 | 8937 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
8938 | reader.comp_unit_die->child |
8939 | = read_die_and_siblings (&reader, reader.info_ptr, | |
8940 | &info_ptr, reader.comp_unit_die); | |
8941 | cu->dies = reader.comp_unit_die; | |
dee91e82 | 8942 | /* comp_unit_die is not stored in die_hash, no need. */ |
10b3939b DJ |
8943 | |
8944 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8945 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8946 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8947 | or we won't be able to build types correctly. |
8948 | Similarly, if we do not read the producer, we can not apply | |
8949 | producer-specific interpretation. */ | |
c0ab21c2 | 8950 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
6751ebae TT |
8951 | |
8952 | reader.keep (); | |
10b3939b DJ |
8953 | } |
8954 | ||
3da10d80 KS |
8955 | /* Add a DIE to the delayed physname list. */ |
8956 | ||
8957 | static void | |
8958 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8959 | const char *name, struct die_info *die, | |
8960 | struct dwarf2_cu *cu) | |
8961 | { | |
8962 | struct delayed_method_info mi; | |
8963 | mi.type = type; | |
8964 | mi.fnfield_index = fnfield_index; | |
8965 | mi.index = index; | |
8966 | mi.name = name; | |
8967 | mi.die = die; | |
c89b44cd | 8968 | cu->method_list.push_back (mi); |
3da10d80 KS |
8969 | } |
8970 | ||
3693fdb3 PA |
8971 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8972 | "const" / "volatile". If so, decrements LEN by the length of the | |
8973 | modifier and return true. Otherwise return false. */ | |
8974 | ||
8975 | template<size_t N> | |
8976 | static bool | |
8977 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8978 | { | |
8979 | size_t mod_len = sizeof (mod) - 1; | |
8980 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8981 | { | |
8982 | len -= mod_len; | |
8983 | return true; | |
8984 | } | |
8985 | return false; | |
8986 | } | |
8987 | ||
3da10d80 KS |
8988 | /* Compute the physnames of any methods on the CU's method list. |
8989 | ||
8990 | The computation of method physnames is delayed in order to avoid the | |
8991 | (bad) condition that one of the method's formal parameters is of an as yet | |
8992 | incomplete type. */ | |
8993 | ||
8994 | static void | |
8995 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8996 | { | |
3693fdb3 | 8997 | /* Only C++ delays computing physnames. */ |
c89b44cd | 8998 | if (cu->method_list.empty ()) |
3693fdb3 PA |
8999 | return; |
9000 | gdb_assert (cu->language == language_cplus); | |
9001 | ||
52941706 | 9002 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 9003 | { |
1d06ead6 | 9004 | const char *physname; |
3da10d80 | 9005 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
9006 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
9007 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
9008 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 9009 | = physname ? physname : ""; |
3693fdb3 PA |
9010 | |
9011 | /* Since there's no tag to indicate whether a method is a | |
9012 | const/volatile overload, extract that information out of the | |
9013 | demangled name. */ | |
9014 | if (physname != NULL) | |
9015 | { | |
9016 | size_t len = strlen (physname); | |
9017 | ||
9018 | while (1) | |
9019 | { | |
9020 | if (physname[len] == ')') /* shortcut */ | |
9021 | break; | |
9022 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 9023 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 9024 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 9025 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
9026 | else |
9027 | break; | |
9028 | } | |
9029 | } | |
3da10d80 | 9030 | } |
c89b44cd TT |
9031 | |
9032 | /* The list is no longer needed. */ | |
9033 | cu->method_list.clear (); | |
3da10d80 KS |
9034 | } |
9035 | ||
a766d390 DE |
9036 | /* Go objects should be embedded in a DW_TAG_module DIE, |
9037 | and it's not clear if/how imported objects will appear. | |
9038 | To keep Go support simple until that's worked out, | |
9039 | go back through what we've read and create something usable. | |
9040 | We could do this while processing each DIE, and feels kinda cleaner, | |
9041 | but that way is more invasive. | |
9042 | This is to, for example, allow the user to type "p var" or "b main" | |
9043 | without having to specify the package name, and allow lookups | |
9044 | of module.object to work in contexts that use the expression | |
9045 | parser. */ | |
9046 | ||
9047 | static void | |
9048 | fixup_go_packaging (struct dwarf2_cu *cu) | |
9049 | { | |
421d1616 | 9050 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
9051 | struct pending *list; |
9052 | int i; | |
9053 | ||
c24bdb02 | 9054 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
9055 | list != NULL; |
9056 | list = list->next) | |
a766d390 DE |
9057 | { |
9058 | for (i = 0; i < list->nsyms; ++i) | |
9059 | { | |
9060 | struct symbol *sym = list->symbol[i]; | |
9061 | ||
c1b5c1eb | 9062 | if (sym->language () == language_go |
a766d390 DE |
9063 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
9064 | { | |
421d1616 TT |
9065 | gdb::unique_xmalloc_ptr<char> this_package_name |
9066 | (go_symbol_package_name (sym)); | |
a766d390 DE |
9067 | |
9068 | if (this_package_name == NULL) | |
9069 | continue; | |
9070 | if (package_name == NULL) | |
421d1616 | 9071 | package_name = std::move (this_package_name); |
a766d390 DE |
9072 | else |
9073 | { | |
518817b3 SM |
9074 | struct objfile *objfile |
9075 | = cu->per_cu->dwarf2_per_objfile->objfile; | |
421d1616 | 9076 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 9077 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
9078 | (symbol_symtab (sym) != NULL |
9079 | ? symtab_to_filename_for_display | |
9080 | (symbol_symtab (sym)) | |
e3b94546 | 9081 | : objfile_name (objfile)), |
421d1616 | 9082 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
9083 | } |
9084 | } | |
9085 | } | |
9086 | } | |
9087 | ||
9088 | if (package_name != NULL) | |
9089 | { | |
518817b3 | 9090 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 9091 | const char *saved_package_name = objfile->intern (package_name.get ()); |
19f392bc UW |
9092 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
9093 | saved_package_name); | |
a766d390 DE |
9094 | struct symbol *sym; |
9095 | ||
e623cf5d | 9096 | sym = allocate_symbol (objfile); |
d3ecddab | 9097 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 9098 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
9099 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
9100 | e.g., "main" finds the "main" module and not C's main(). */ | |
9101 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 9102 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
9103 | SYMBOL_TYPE (sym) = type; |
9104 | ||
c24bdb02 | 9105 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
9106 | } |
9107 | } | |
9108 | ||
c9317f21 TT |
9109 | /* Allocate a fully-qualified name consisting of the two parts on the |
9110 | obstack. */ | |
9111 | ||
9112 | static const char * | |
9113 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
9114 | { | |
9115 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
9116 | } | |
9117 | ||
9118 | /* A helper that allocates a struct discriminant_info to attach to a | |
9119 | union type. */ | |
9120 | ||
9121 | static struct discriminant_info * | |
9122 | alloc_discriminant_info (struct type *type, int discriminant_index, | |
9123 | int default_index) | |
9124 | { | |
9125 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
c7b15a66 TT |
9126 | gdb_assert (discriminant_index == -1 |
9127 | || (discriminant_index >= 0 | |
9128 | && discriminant_index < TYPE_NFIELDS (type))); | |
c9317f21 | 9129 | gdb_assert (default_index == -1 |
c7b15a66 | 9130 | || (default_index >= 0 && default_index < TYPE_NFIELDS (type))); |
c9317f21 TT |
9131 | |
9132 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
9133 | ||
9134 | struct discriminant_info *disc | |
9135 | = ((struct discriminant_info *) | |
9136 | TYPE_ZALLOC (type, | |
9137 | offsetof (struct discriminant_info, discriminants) | |
9138 | + TYPE_NFIELDS (type) * sizeof (disc->discriminants[0]))); | |
9139 | disc->default_index = default_index; | |
9140 | disc->discriminant_index = discriminant_index; | |
9141 | ||
9142 | struct dynamic_prop prop; | |
9143 | prop.kind = PROP_UNDEFINED; | |
9144 | prop.data.baton = disc; | |
9145 | ||
9146 | add_dyn_prop (DYN_PROP_DISCRIMINATED, prop, type); | |
9147 | ||
9148 | return disc; | |
9149 | } | |
9150 | ||
9151 | /* Some versions of rustc emitted enums in an unusual way. | |
9152 | ||
9153 | Ordinary enums were emitted as unions. The first element of each | |
9154 | structure in the union was named "RUST$ENUM$DISR". This element | |
9155 | held the discriminant. | |
9156 | ||
9157 | These versions of Rust also implemented the "non-zero" | |
9158 | optimization. When the enum had two values, and one is empty and | |
9159 | the other holds a pointer that cannot be zero, the pointer is used | |
9160 | as the discriminant, with a zero value meaning the empty variant. | |
9161 | Here, the union's first member is of the form | |
9162 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
9163 | where the fieldnos are the indices of the fields that should be | |
9164 | traversed in order to find the field (which may be several fields deep) | |
9165 | and the variantname is the name of the variant of the case when the | |
9166 | field is zero. | |
9167 | ||
9168 | This function recognizes whether TYPE is of one of these forms, | |
9169 | and, if so, smashes it to be a variant type. */ | |
9170 | ||
9171 | static void | |
9172 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
9173 | { | |
9174 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_UNION); | |
9175 | ||
9176 | /* We don't need to deal with empty enums. */ | |
9177 | if (TYPE_NFIELDS (type) == 0) | |
9178 | return; | |
9179 | ||
9180 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
9181 | if (TYPE_NFIELDS (type) == 1 | |
9182 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) | |
9183 | { | |
9184 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
9185 | ||
9186 | /* Decode the field name to find the offset of the | |
9187 | discriminant. */ | |
9188 | ULONGEST bit_offset = 0; | |
9189 | struct type *field_type = TYPE_FIELD_TYPE (type, 0); | |
9190 | while (name[0] >= '0' && name[0] <= '9') | |
9191 | { | |
9192 | char *tail; | |
9193 | unsigned long index = strtoul (name, &tail, 10); | |
9194 | name = tail; | |
9195 | if (*name != '$' | |
9196 | || index >= TYPE_NFIELDS (field_type) | |
9197 | || (TYPE_FIELD_LOC_KIND (field_type, index) | |
9198 | != FIELD_LOC_KIND_BITPOS)) | |
9199 | { | |
b98664d3 | 9200 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
9201 | "[in module %s]"), |
9202 | TYPE_FIELD_NAME (type, 0), | |
9203 | objfile_name (objfile)); | |
9204 | return; | |
9205 | } | |
9206 | ++name; | |
9207 | ||
9208 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
9209 | field_type = TYPE_FIELD_TYPE (field_type, index); | |
9210 | } | |
9211 | ||
9212 | /* Make a union to hold the variants. */ | |
9213 | struct type *union_type = alloc_type (objfile); | |
9214 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9215 | TYPE_NFIELDS (union_type) = 3; | |
9216 | TYPE_FIELDS (union_type) | |
9217 | = (struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field)); | |
9218 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9219 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9220 | |
9221 | /* Put the discriminant must at index 0. */ | |
9222 | TYPE_FIELD_TYPE (union_type, 0) = field_type; | |
9223 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9224 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9225 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 0), bit_offset); | |
9226 | ||
9227 | /* The order of fields doesn't really matter, so put the real | |
9228 | field at index 1 and the data-less field at index 2. */ | |
9229 | struct discriminant_info *disc | |
9230 | = alloc_discriminant_info (union_type, 0, 1); | |
9231 | TYPE_FIELD (union_type, 1) = TYPE_FIELD (type, 0); | |
9232 | TYPE_FIELD_NAME (union_type, 1) | |
9233 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1))); | |
9234 | TYPE_NAME (TYPE_FIELD_TYPE (union_type, 1)) | |
9235 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9236 | TYPE_FIELD_NAME (union_type, 1)); | |
9237 | ||
9238 | const char *dataless_name | |
9239 | = rust_fully_qualify (&objfile->objfile_obstack, TYPE_NAME (type), | |
9240 | name); | |
9241 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
9242 | dataless_name); | |
9243 | TYPE_FIELD_TYPE (union_type, 2) = dataless_type; | |
9244 | /* NAME points into the original discriminant name, which | |
9245 | already has the correct lifetime. */ | |
9246 | TYPE_FIELD_NAME (union_type, 2) = name; | |
9247 | SET_FIELD_BITPOS (TYPE_FIELD (union_type, 2), 0); | |
9248 | disc->discriminants[2] = 0; | |
9249 | ||
9250 | /* Smash this type to be a structure type. We have to do this | |
9251 | because the type has already been recorded. */ | |
9252 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9253 | TYPE_NFIELDS (type) = 1; | |
9254 | TYPE_FIELDS (type) | |
9255 | = (struct field *) TYPE_ZALLOC (type, sizeof (struct field)); | |
9256 | ||
9257 | /* Install the variant part. */ | |
9258 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9259 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9260 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9261 | } | |
77c2dba3 TT |
9262 | /* A union with a single anonymous field is probably an old-style |
9263 | univariant enum. */ | |
9264 | else if (TYPE_NFIELDS (type) == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) | |
c9317f21 | 9265 | { |
c9317f21 TT |
9266 | /* Smash this type to be a structure type. We have to do this |
9267 | because the type has already been recorded. */ | |
9268 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9269 | ||
9270 | /* Make a union to hold the variants. */ | |
9271 | struct type *union_type = alloc_type (objfile); | |
9272 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9273 | TYPE_NFIELDS (union_type) = TYPE_NFIELDS (type); | |
9274 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9275 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9276 | TYPE_FIELDS (union_type) = TYPE_FIELDS (type); |
9277 | ||
9278 | struct type *field_type = TYPE_FIELD_TYPE (union_type, 0); | |
9279 | const char *variant_name | |
9280 | = rust_last_path_segment (TYPE_NAME (field_type)); | |
9281 | TYPE_FIELD_NAME (union_type, 0) = variant_name; | |
9282 | TYPE_NAME (field_type) | |
9283 | = rust_fully_qualify (&objfile->objfile_obstack, | |
c7b15a66 | 9284 | TYPE_NAME (type), variant_name); |
c9317f21 TT |
9285 | |
9286 | /* Install the union in the outer struct type. */ | |
9287 | TYPE_NFIELDS (type) = 1; | |
9288 | TYPE_FIELDS (type) | |
9289 | = (struct field *) TYPE_ZALLOC (union_type, sizeof (struct field)); | |
9290 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9291 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9292 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9293 | ||
9294 | alloc_discriminant_info (union_type, -1, 0); | |
9295 | } | |
9296 | else | |
9297 | { | |
9298 | struct type *disr_type = nullptr; | |
9299 | for (int i = 0; i < TYPE_NFIELDS (type); ++i) | |
9300 | { | |
9301 | disr_type = TYPE_FIELD_TYPE (type, i); | |
9302 | ||
a037790e TT |
9303 | if (TYPE_CODE (disr_type) != TYPE_CODE_STRUCT) |
9304 | { | |
9305 | /* All fields of a true enum will be structs. */ | |
9306 | return; | |
9307 | } | |
9308 | else if (TYPE_NFIELDS (disr_type) == 0) | |
c9317f21 TT |
9309 | { |
9310 | /* Could be data-less variant, so keep going. */ | |
a037790e | 9311 | disr_type = nullptr; |
c9317f21 TT |
9312 | } |
9313 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
9314 | "RUST$ENUM$DISR") != 0) | |
9315 | { | |
9316 | /* Not a Rust enum. */ | |
9317 | return; | |
9318 | } | |
9319 | else | |
9320 | { | |
9321 | /* Found one. */ | |
9322 | break; | |
9323 | } | |
9324 | } | |
9325 | ||
9326 | /* If we got here without a discriminant, then it's probably | |
9327 | just a union. */ | |
9328 | if (disr_type == nullptr) | |
9329 | return; | |
9330 | ||
9331 | /* Smash this type to be a structure type. We have to do this | |
9332 | because the type has already been recorded. */ | |
9333 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
9334 | ||
9335 | /* Make a union to hold the variants. */ | |
9336 | struct field *disr_field = &TYPE_FIELD (disr_type, 0); | |
9337 | struct type *union_type = alloc_type (objfile); | |
9338 | TYPE_CODE (union_type) = TYPE_CODE_UNION; | |
9339 | TYPE_NFIELDS (union_type) = 1 + TYPE_NFIELDS (type); | |
9340 | TYPE_LENGTH (union_type) = TYPE_LENGTH (type); | |
2b4424c3 | 9341 | set_type_align (union_type, TYPE_RAW_ALIGN (type)); |
c9317f21 TT |
9342 | TYPE_FIELDS (union_type) |
9343 | = (struct field *) TYPE_ZALLOC (union_type, | |
9344 | (TYPE_NFIELDS (union_type) | |
9345 | * sizeof (struct field))); | |
9346 | ||
9347 | memcpy (TYPE_FIELDS (union_type) + 1, TYPE_FIELDS (type), | |
9348 | TYPE_NFIELDS (type) * sizeof (struct field)); | |
9349 | ||
9350 | /* Install the discriminant at index 0 in the union. */ | |
9351 | TYPE_FIELD (union_type, 0) = *disr_field; | |
9352 | TYPE_FIELD_ARTIFICIAL (union_type, 0) = 1; | |
9353 | TYPE_FIELD_NAME (union_type, 0) = "<<discriminant>>"; | |
9354 | ||
9355 | /* Install the union in the outer struct type. */ | |
9356 | TYPE_FIELD_TYPE (type, 0) = union_type; | |
9357 | TYPE_FIELD_NAME (type, 0) = "<<variants>>"; | |
9358 | TYPE_NFIELDS (type) = 1; | |
9359 | ||
9360 | /* Set the size and offset of the union type. */ | |
9361 | SET_FIELD_BITPOS (TYPE_FIELD (type, 0), 0); | |
9362 | ||
9363 | /* We need a way to find the correct discriminant given a | |
9364 | variant name. For convenience we build a map here. */ | |
9365 | struct type *enum_type = FIELD_TYPE (*disr_field); | |
9366 | std::unordered_map<std::string, ULONGEST> discriminant_map; | |
9367 | for (int i = 0; i < TYPE_NFIELDS (enum_type); ++i) | |
9368 | { | |
9369 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
9370 | { | |
9371 | const char *name | |
9372 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
9373 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
9374 | } | |
9375 | } | |
9376 | ||
9377 | int n_fields = TYPE_NFIELDS (union_type); | |
9378 | struct discriminant_info *disc | |
9379 | = alloc_discriminant_info (union_type, 0, -1); | |
9380 | /* Skip the discriminant here. */ | |
9381 | for (int i = 1; i < n_fields; ++i) | |
9382 | { | |
9383 | /* Find the final word in the name of this variant's type. | |
9384 | That name can be used to look up the correct | |
9385 | discriminant. */ | |
9386 | const char *variant_name | |
9387 | = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type, | |
9388 | i))); | |
9389 | ||
9390 | auto iter = discriminant_map.find (variant_name); | |
9391 | if (iter != discriminant_map.end ()) | |
9392 | disc->discriminants[i] = iter->second; | |
9393 | ||
bedda9ac | 9394 | /* Remove the discriminant field, if it exists. */ |
c9317f21 | 9395 | struct type *sub_type = TYPE_FIELD_TYPE (union_type, i); |
bedda9ac TT |
9396 | if (TYPE_NFIELDS (sub_type) > 0) |
9397 | { | |
9398 | --TYPE_NFIELDS (sub_type); | |
9399 | ++TYPE_FIELDS (sub_type); | |
9400 | } | |
c9317f21 TT |
9401 | TYPE_FIELD_NAME (union_type, i) = variant_name; |
9402 | TYPE_NAME (sub_type) | |
9403 | = rust_fully_qualify (&objfile->objfile_obstack, | |
9404 | TYPE_NAME (type), variant_name); | |
9405 | } | |
9406 | } | |
9407 | } | |
9408 | ||
9409 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
9410 | ||
9411 | static void | |
9412 | rust_union_quirks (struct dwarf2_cu *cu) | |
9413 | { | |
9414 | gdb_assert (cu->language == language_rust); | |
52941706 SM |
9415 | for (type *type_ : cu->rust_unions) |
9416 | quirk_rust_enum (type_, cu->per_cu->dwarf2_per_objfile->objfile); | |
2d79090e TT |
9417 | /* We don't need this any more. */ |
9418 | cu->rust_unions.clear (); | |
c9317f21 TT |
9419 | } |
9420 | ||
95554aad TT |
9421 | /* Return the symtab for PER_CU. This works properly regardless of |
9422 | whether we're using the index or psymtabs. */ | |
9423 | ||
43f3e411 DE |
9424 | static struct compunit_symtab * |
9425 | get_compunit_symtab (struct dwarf2_per_cu_data *per_cu) | |
95554aad | 9426 | { |
ed2dc618 | 9427 | return (per_cu->dwarf2_per_objfile->using_index |
43f3e411 DE |
9428 | ? per_cu->v.quick->compunit_symtab |
9429 | : per_cu->v.psymtab->compunit_symtab); | |
95554aad TT |
9430 | } |
9431 | ||
9432 | /* A helper function for computing the list of all symbol tables | |
9433 | included by PER_CU. */ | |
9434 | ||
9435 | static void | |
4c39bc03 | 9436 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 9437 | htab_t all_children, htab_t all_type_symtabs, |
f9125b6c | 9438 | struct dwarf2_per_cu_data *per_cu, |
43f3e411 | 9439 | struct compunit_symtab *immediate_parent) |
95554aad TT |
9440 | { |
9441 | void **slot; | |
43f3e411 | 9442 | struct compunit_symtab *cust; |
95554aad TT |
9443 | |
9444 | slot = htab_find_slot (all_children, per_cu, INSERT); | |
9445 | if (*slot != NULL) | |
9446 | { | |
9447 | /* This inclusion and its children have been processed. */ | |
9448 | return; | |
9449 | } | |
9450 | ||
9451 | *slot = per_cu; | |
9452 | /* Only add a CU if it has a symbol table. */ | |
43f3e411 DE |
9453 | cust = get_compunit_symtab (per_cu); |
9454 | if (cust != NULL) | |
ec94af83 DE |
9455 | { |
9456 | /* If this is a type unit only add its symbol table if we haven't | |
9457 | seen it yet (type unit per_cu's can share symtabs). */ | |
9458 | if (per_cu->is_debug_types) | |
9459 | { | |
43f3e411 | 9460 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9461 | if (*slot == NULL) |
9462 | { | |
43f3e411 | 9463 | *slot = cust; |
4c39bc03 | 9464 | result->push_back (cust); |
43f3e411 DE |
9465 | if (cust->user == NULL) |
9466 | cust->user = immediate_parent; | |
ec94af83 DE |
9467 | } |
9468 | } | |
9469 | else | |
f9125b6c | 9470 | { |
4c39bc03 | 9471 | result->push_back (cust); |
43f3e411 DE |
9472 | if (cust->user == NULL) |
9473 | cust->user = immediate_parent; | |
f9125b6c | 9474 | } |
ec94af83 | 9475 | } |
95554aad | 9476 | |
ae640021 AB |
9477 | if (!per_cu->imported_symtabs_empty ()) |
9478 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
9479 | { | |
9480 | recursively_compute_inclusions (result, all_children, | |
9481 | all_type_symtabs, ptr, cust); | |
9482 | } | |
95554aad TT |
9483 | } |
9484 | ||
43f3e411 | 9485 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9486 | PER_CU. */ |
9487 | ||
9488 | static void | |
43f3e411 | 9489 | compute_compunit_symtab_includes (struct dwarf2_per_cu_data *per_cu) |
95554aad | 9490 | { |
f4dc4d17 DE |
9491 | gdb_assert (! per_cu->is_debug_types); |
9492 | ||
ae640021 | 9493 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 9494 | { |
ae640021 | 9495 | int len; |
4c39bc03 | 9496 | std::vector<compunit_symtab *> result_symtabs; |
ec94af83 | 9497 | htab_t all_children, all_type_symtabs; |
43f3e411 | 9498 | struct compunit_symtab *cust = get_compunit_symtab (per_cu); |
95554aad TT |
9499 | |
9500 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9501 | if (cust == NULL) |
95554aad TT |
9502 | return; |
9503 | ||
9504 | all_children = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, | |
9505 | NULL, xcalloc, xfree); | |
ec94af83 DE |
9506 | all_type_symtabs = htab_create_alloc (1, htab_hash_pointer, htab_eq_pointer, |
9507 | NULL, xcalloc, xfree); | |
95554aad | 9508 | |
ae640021 | 9509 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 DE |
9510 | { |
9511 | recursively_compute_inclusions (&result_symtabs, all_children, | |
ae640021 | 9512 | all_type_symtabs, ptr, cust); |
ec94af83 | 9513 | } |
95554aad | 9514 | |
ec94af83 | 9515 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 9516 | len = result_symtabs.size (); |
43f3e411 | 9517 | cust->includes |
ed2dc618 | 9518 | = XOBNEWVEC (&per_cu->dwarf2_per_objfile->objfile->objfile_obstack, |
8d749320 | 9519 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
9520 | memcpy (cust->includes, result_symtabs.data (), |
9521 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 9522 | cust->includes[len] = NULL; |
95554aad | 9523 | |
95554aad | 9524 | htab_delete (all_children); |
ec94af83 | 9525 | htab_delete (all_type_symtabs); |
95554aad TT |
9526 | } |
9527 | } | |
9528 | ||
9529 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9530 | read. */ | |
9531 | ||
9532 | static void | |
ed2dc618 | 9533 | process_cu_includes (struct dwarf2_per_objfile *dwarf2_per_objfile) |
95554aad | 9534 | { |
71b73764 | 9535 | for (dwarf2_per_cu_data *iter : dwarf2_per_objfile->just_read_cus) |
f4dc4d17 DE |
9536 | { |
9537 | if (! iter->is_debug_types) | |
43f3e411 | 9538 | compute_compunit_symtab_includes (iter); |
f4dc4d17 | 9539 | } |
95554aad | 9540 | |
c5d0225d | 9541 | dwarf2_per_objfile->just_read_cus.clear (); |
95554aad TT |
9542 | } |
9543 | ||
9cdd5dbd | 9544 | /* Generate full symbol information for PER_CU, whose DIEs have |
10b3939b DJ |
9545 | already been loaded into memory. */ |
9546 | ||
9547 | static void | |
95554aad TT |
9548 | process_full_comp_unit (struct dwarf2_per_cu_data *per_cu, |
9549 | enum language pretend_language) | |
10b3939b | 9550 | { |
10b3939b | 9551 | struct dwarf2_cu *cu = per_cu->cu; |
ed2dc618 SM |
9552 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9553 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
3e29f34a | 9554 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
10b3939b | 9555 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9556 | struct compunit_symtab *cust; |
10b3939b | 9557 | CORE_ADDR baseaddr; |
4359dff1 | 9558 | struct block *static_block; |
3e29f34a | 9559 | CORE_ADDR addr; |
10b3939b | 9560 | |
b3b3bada | 9561 | baseaddr = objfile->text_section_offset (); |
10b3939b | 9562 | |
c89b44cd TT |
9563 | /* Clear the list here in case something was left over. */ |
9564 | cu->method_list.clear (); | |
10b3939b | 9565 | |
95554aad TT |
9566 | cu->language = pretend_language; |
9567 | cu->language_defn = language_def (cu->language); | |
9568 | ||
c906108c | 9569 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9570 | process_die (cu->dies, cu); |
c906108c | 9571 | |
a766d390 DE |
9572 | /* For now fudge the Go package. */ |
9573 | if (cu->language == language_go) | |
9574 | fixup_go_packaging (cu); | |
9575 | ||
5f48f8f3 | 9576 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
9577 | should be complete, and it should now be safe to compute all of the |
9578 | physnames. */ | |
9579 | compute_delayed_physnames (cu); | |
3da10d80 | 9580 | |
c9317f21 TT |
9581 | if (cu->language == language_rust) |
9582 | rust_union_quirks (cu); | |
9583 | ||
fae299cd DC |
9584 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9585 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9586 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9587 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9588 | |
3e29f34a | 9589 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 9590 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
9591 | |
9592 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9593 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9594 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9595 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9596 | this comp unit. */ | |
9597 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9598 | ||
c24bdb02 | 9599 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
9600 | SECT_OFF_TEXT (objfile), |
9601 | 0); | |
c906108c | 9602 | |
43f3e411 | 9603 | if (cust != NULL) |
c906108c | 9604 | { |
df15bd07 | 9605 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9606 | |
8be455d7 JK |
9607 | /* Set symtab language to language from DW_AT_language. If the |
9608 | compilation is from a C file generated by language preprocessors, do | |
9609 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9610 | if (!(cu->language == language_c |
40e3ad0e | 9611 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9612 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9613 | |
9614 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9615 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9616 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9617 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9618 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9619 | |
9620 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9621 | needed, it would be wrong due to missing DW_AT_producer there. | |
9622 | ||
9623 | Still one can confuse GDB by using non-standard GCC compilation | |
9624 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 9625 | */ |
ab260dad | 9626 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9627 | cust->locations_valid = 1; |
e0d00bc7 JK |
9628 | |
9629 | if (gcc_4_minor >= 5) | |
43f3e411 | 9630 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9631 | |
43f3e411 | 9632 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9633 | } |
9291a0cd TT |
9634 | |
9635 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9636 | per_cu->v.quick->compunit_symtab = cust; |
9291a0cd TT |
9637 | else |
9638 | { | |
891813be | 9639 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9640 | pst->compunit_symtab = cust; |
6d94535f | 9641 | pst->readin = true; |
9291a0cd | 9642 | } |
c906108c | 9643 | |
95554aad | 9644 | /* Push it for inclusion processing later. */ |
c5d0225d | 9645 | dwarf2_per_objfile->just_read_cus.push_back (per_cu); |
804d2729 TT |
9646 | |
9647 | /* Not needed any more. */ | |
c24bdb02 | 9648 | cu->reset_builder (); |
f4dc4d17 | 9649 | } |
45cfd468 | 9650 | |
f4dc4d17 DE |
9651 | /* Generate full symbol information for type unit PER_CU, whose DIEs have |
9652 | already been loaded into memory. */ | |
9653 | ||
9654 | static void | |
9655 | process_full_type_unit (struct dwarf2_per_cu_data *per_cu, | |
9656 | enum language pretend_language) | |
9657 | { | |
9658 | struct dwarf2_cu *cu = per_cu->cu; | |
ed2dc618 SM |
9659 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
9660 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
43f3e411 | 9661 | struct compunit_symtab *cust; |
0186c6a7 DE |
9662 | struct signatured_type *sig_type; |
9663 | ||
9664 | gdb_assert (per_cu->is_debug_types); | |
9665 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 9666 | |
c89b44cd TT |
9667 | /* Clear the list here in case something was left over. */ |
9668 | cu->method_list.clear (); | |
f4dc4d17 | 9669 | |
f4dc4d17 DE |
9670 | cu->language = pretend_language; |
9671 | cu->language_defn = language_def (cu->language); | |
9672 | ||
9673 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9674 | process_die (cu->dies, cu); | |
9675 | ||
9676 | /* For now fudge the Go package. */ | |
9677 | if (cu->language == language_go) | |
9678 | fixup_go_packaging (cu); | |
9679 | ||
5f48f8f3 | 9680 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
9681 | should be complete, and it should now be safe to compute all of the |
9682 | physnames. */ | |
9683 | compute_delayed_physnames (cu); | |
f4dc4d17 | 9684 | |
c9317f21 TT |
9685 | if (cu->language == language_rust) |
9686 | rust_union_quirks (cu); | |
9687 | ||
f4dc4d17 DE |
9688 | /* TUs share symbol tables. |
9689 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9690 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9691 | this TU's symbols to the existing symtab. */ | |
43f3e411 | 9692 | if (sig_type->type_unit_group->compunit_symtab == NULL) |
45cfd468 | 9693 | { |
c24bdb02 KS |
9694 | buildsym_compunit *builder = cu->get_builder (); |
9695 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
43f3e411 | 9696 | sig_type->type_unit_group->compunit_symtab = cust; |
f4dc4d17 | 9697 | |
43f3e411 | 9698 | if (cust != NULL) |
f4dc4d17 DE |
9699 | { |
9700 | /* Set symtab language to language from DW_AT_language. If the | |
9701 | compilation is from a C file generated by language preprocessors, | |
9702 | do not set the language if it was already deduced by | |
9703 | start_subfile. */ | |
43f3e411 DE |
9704 | if (!(cu->language == language_c |
9705 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9706 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9707 | } |
9708 | } | |
9709 | else | |
9710 | { | |
c24bdb02 | 9711 | cu->get_builder ()->augment_type_symtab (); |
43f3e411 | 9712 | cust = sig_type->type_unit_group->compunit_symtab; |
f4dc4d17 DE |
9713 | } |
9714 | ||
9715 | if (dwarf2_per_objfile->using_index) | |
43f3e411 | 9716 | per_cu->v.quick->compunit_symtab = cust; |
f4dc4d17 DE |
9717 | else |
9718 | { | |
891813be | 9719 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
43f3e411 | 9720 | pst->compunit_symtab = cust; |
6d94535f | 9721 | pst->readin = true; |
45cfd468 | 9722 | } |
804d2729 TT |
9723 | |
9724 | /* Not needed any more. */ | |
c24bdb02 | 9725 | cu->reset_builder (); |
c906108c SS |
9726 | } |
9727 | ||
95554aad TT |
9728 | /* Process an imported unit DIE. */ |
9729 | ||
9730 | static void | |
9731 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9732 | { | |
9733 | struct attribute *attr; | |
9734 | ||
f4dc4d17 DE |
9735 | /* For now we don't handle imported units in type units. */ |
9736 | if (cu->per_cu->is_debug_types) | |
9737 | { | |
9738 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9739 | " supported in type units [in module %s]"), | |
518817b3 | 9740 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
f4dc4d17 DE |
9741 | } |
9742 | ||
95554aad TT |
9743 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9744 | if (attr != NULL) | |
9745 | { | |
9c541725 PA |
9746 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
9747 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); | |
9748 | dwarf2_per_cu_data *per_cu | |
e3b94546 | 9749 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, |
518817b3 | 9750 | cu->per_cu->dwarf2_per_objfile); |
95554aad | 9751 | |
58990295 TV |
9752 | /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit |
9753 | into another compilation unit, at root level. Regard this as a hint, | |
9754 | and ignore it. */ | |
9755 | if (die->parent && die->parent->parent == NULL | |
9756 | && per_cu->unit_type == DW_UT_compile | |
9757 | && per_cu->lang == language_cplus) | |
9758 | return; | |
9759 | ||
69d751e3 | 9760 | /* If necessary, add it to the queue and load its DIEs. */ |
95554aad | 9761 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 9762 | load_full_comp_unit (per_cu, false, cu->language); |
95554aad | 9763 | |
ae640021 | 9764 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
9765 | } |
9766 | } | |
9767 | ||
4c8aa72d PA |
9768 | /* RAII object that represents a process_die scope: i.e., |
9769 | starts/finishes processing a DIE. */ | |
9770 | class process_die_scope | |
adde2bff | 9771 | { |
4c8aa72d PA |
9772 | public: |
9773 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9774 | : m_die (die), m_cu (cu) | |
9775 | { | |
9776 | /* We should only be processing DIEs not already in process. */ | |
9777 | gdb_assert (!m_die->in_process); | |
9778 | m_die->in_process = true; | |
9779 | } | |
8c3cb9fa | 9780 | |
4c8aa72d PA |
9781 | ~process_die_scope () |
9782 | { | |
9783 | m_die->in_process = false; | |
9784 | ||
9785 | /* If we're done processing the DIE for the CU that owns the line | |
9786 | header, we don't need the line header anymore. */ | |
9787 | if (m_cu->line_header_die_owner == m_die) | |
9788 | { | |
9789 | delete m_cu->line_header; | |
9790 | m_cu->line_header = NULL; | |
9791 | m_cu->line_header_die_owner = NULL; | |
9792 | } | |
9793 | } | |
9794 | ||
9795 | private: | |
9796 | die_info *m_die; | |
9797 | dwarf2_cu *m_cu; | |
9798 | }; | |
adde2bff | 9799 | |
c906108c SS |
9800 | /* Process a die and its children. */ |
9801 | ||
9802 | static void | |
e7c27a73 | 9803 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9804 | { |
4c8aa72d | 9805 | process_die_scope scope (die, cu); |
adde2bff | 9806 | |
c906108c SS |
9807 | switch (die->tag) |
9808 | { | |
9809 | case DW_TAG_padding: | |
9810 | break; | |
9811 | case DW_TAG_compile_unit: | |
95554aad | 9812 | case DW_TAG_partial_unit: |
e7c27a73 | 9813 | read_file_scope (die, cu); |
c906108c | 9814 | break; |
348e048f DE |
9815 | case DW_TAG_type_unit: |
9816 | read_type_unit_scope (die, cu); | |
9817 | break; | |
c906108c | 9818 | case DW_TAG_subprogram: |
0a4b0913 AB |
9819 | /* Nested subprograms in Fortran get a prefix. */ |
9820 | if (cu->language == language_fortran | |
9821 | && die->parent != NULL | |
9822 | && die->parent->tag == DW_TAG_subprogram) | |
9823 | cu->processing_has_namespace_info = true; | |
9824 | /* Fall through. */ | |
c906108c | 9825 | case DW_TAG_inlined_subroutine: |
edb3359d | 9826 | read_func_scope (die, cu); |
c906108c SS |
9827 | break; |
9828 | case DW_TAG_lexical_block: | |
14898363 L |
9829 | case DW_TAG_try_block: |
9830 | case DW_TAG_catch_block: | |
e7c27a73 | 9831 | read_lexical_block_scope (die, cu); |
c906108c | 9832 | break; |
216f72a1 | 9833 | case DW_TAG_call_site: |
96408a79 SA |
9834 | case DW_TAG_GNU_call_site: |
9835 | read_call_site_scope (die, cu); | |
9836 | break; | |
c906108c | 9837 | case DW_TAG_class_type: |
680b30c7 | 9838 | case DW_TAG_interface_type: |
c906108c SS |
9839 | case DW_TAG_structure_type: |
9840 | case DW_TAG_union_type: | |
134d01f1 | 9841 | process_structure_scope (die, cu); |
c906108c SS |
9842 | break; |
9843 | case DW_TAG_enumeration_type: | |
134d01f1 | 9844 | process_enumeration_scope (die, cu); |
c906108c | 9845 | break; |
134d01f1 | 9846 | |
f792889a DJ |
9847 | /* These dies have a type, but processing them does not create |
9848 | a symbol or recurse to process the children. Therefore we can | |
9849 | read them on-demand through read_type_die. */ | |
c906108c | 9850 | case DW_TAG_subroutine_type: |
72019c9c | 9851 | case DW_TAG_set_type: |
c906108c | 9852 | case DW_TAG_array_type: |
c906108c | 9853 | case DW_TAG_pointer_type: |
c906108c | 9854 | case DW_TAG_ptr_to_member_type: |
c906108c | 9855 | case DW_TAG_reference_type: |
4297a3f0 | 9856 | case DW_TAG_rvalue_reference_type: |
c906108c | 9857 | case DW_TAG_string_type: |
c906108c | 9858 | break; |
134d01f1 | 9859 | |
c906108c | 9860 | case DW_TAG_base_type: |
a02abb62 | 9861 | case DW_TAG_subrange_type: |
cb249c71 | 9862 | case DW_TAG_typedef: |
134d01f1 DJ |
9863 | /* Add a typedef symbol for the type definition, if it has a |
9864 | DW_AT_name. */ | |
f792889a | 9865 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9866 | break; |
c906108c | 9867 | case DW_TAG_common_block: |
e7c27a73 | 9868 | read_common_block (die, cu); |
c906108c SS |
9869 | break; |
9870 | case DW_TAG_common_inclusion: | |
9871 | break; | |
d9fa45fe | 9872 | case DW_TAG_namespace: |
9068261f | 9873 | cu->processing_has_namespace_info = true; |
e7c27a73 | 9874 | read_namespace (die, cu); |
d9fa45fe | 9875 | break; |
5d7cb8df | 9876 | case DW_TAG_module: |
9068261f | 9877 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
9878 | read_module (die, cu); |
9879 | break; | |
d9fa45fe | 9880 | case DW_TAG_imported_declaration: |
9068261f | 9881 | cu->processing_has_namespace_info = true; |
74921315 KS |
9882 | if (read_namespace_alias (die, cu)) |
9883 | break; | |
86a73007 TT |
9884 | /* The declaration is not a global namespace alias. */ |
9885 | /* Fall through. */ | |
d9fa45fe | 9886 | case DW_TAG_imported_module: |
9068261f | 9887 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
9888 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9889 | || cu->language != language_fortran)) | |
b98664d3 | 9890 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
9891 | dwarf_tag_name (die->tag)); |
9892 | read_import_statement (die, cu); | |
d9fa45fe | 9893 | break; |
95554aad TT |
9894 | |
9895 | case DW_TAG_imported_unit: | |
9896 | process_imported_unit_die (die, cu); | |
9897 | break; | |
9898 | ||
71a3c369 TT |
9899 | case DW_TAG_variable: |
9900 | read_variable (die, cu); | |
9901 | break; | |
9902 | ||
c906108c | 9903 | default: |
e7c27a73 | 9904 | new_symbol (die, NULL, cu); |
c906108c SS |
9905 | break; |
9906 | } | |
9907 | } | |
ca69b9e6 DE |
9908 | \f |
9909 | /* DWARF name computation. */ | |
c906108c | 9910 | |
94af9270 KS |
9911 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9912 | needs to have the name of the scope prepended to the name listed in the | |
9913 | die. */ | |
9914 | ||
9915 | static int | |
9916 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9917 | { | |
1c809c68 TT |
9918 | struct attribute *attr; |
9919 | ||
94af9270 KS |
9920 | switch (die->tag) |
9921 | { | |
9922 | case DW_TAG_namespace: | |
9923 | case DW_TAG_typedef: | |
9924 | case DW_TAG_class_type: | |
9925 | case DW_TAG_interface_type: | |
9926 | case DW_TAG_structure_type: | |
9927 | case DW_TAG_union_type: | |
9928 | case DW_TAG_enumeration_type: | |
9929 | case DW_TAG_enumerator: | |
9930 | case DW_TAG_subprogram: | |
08a76f8a | 9931 | case DW_TAG_inlined_subroutine: |
94af9270 | 9932 | case DW_TAG_member: |
74921315 | 9933 | case DW_TAG_imported_declaration: |
94af9270 KS |
9934 | return 1; |
9935 | ||
9936 | case DW_TAG_variable: | |
c2b0a229 | 9937 | case DW_TAG_constant: |
94af9270 KS |
9938 | /* We only need to prefix "globally" visible variables. These include |
9939 | any variable marked with DW_AT_external or any variable that | |
9940 | lives in a namespace. [Variables in anonymous namespaces | |
9941 | require prefixing, but they are not DW_AT_external.] */ | |
9942 | ||
9943 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9944 | { | |
9945 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9946 | |
94af9270 KS |
9947 | return die_needs_namespace (die_specification (die, &spec_cu), |
9948 | spec_cu); | |
9949 | } | |
9950 | ||
1c809c68 | 9951 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9952 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9953 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9954 | return 0; |
9955 | /* A variable in a lexical block of some kind does not need a | |
9956 | namespace, even though in C++ such variables may be external | |
9957 | and have a mangled name. */ | |
9958 | if (die->parent->tag == DW_TAG_lexical_block | |
9959 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9960 | || die->parent->tag == DW_TAG_catch_block |
9961 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9962 | return 0; |
9963 | return 1; | |
94af9270 KS |
9964 | |
9965 | default: | |
9966 | return 0; | |
9967 | } | |
9968 | } | |
9969 | ||
73b9be8b KS |
9970 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9971 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9972 | defined for the given DIE. */ | |
9973 | ||
9974 | static struct attribute * | |
9975 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9976 | { | |
9977 | struct attribute *attr; | |
9978 | ||
9979 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9980 | if (attr == NULL) | |
9981 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9982 | ||
9983 | return attr; | |
9984 | } | |
9985 | ||
9986 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9987 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9988 | defined for the given DIE. */ | |
9989 | ||
9990 | static const char * | |
9991 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9992 | { | |
9993 | const char *linkage_name; | |
9994 | ||
9995 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9996 | if (linkage_name == NULL) | |
9997 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9998 | ||
9999 | return linkage_name; | |
10000 | } | |
10001 | ||
94af9270 | 10002 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 10003 | compute the physname for the object, which include a method's: |
9c37b5ae | 10004 | - formal parameters (C++), |
a766d390 | 10005 | - receiver type (Go), |
a766d390 DE |
10006 | |
10007 | The term "physname" is a bit confusing. | |
10008 | For C++, for example, it is the demangled name. | |
10009 | For Go, for example, it's the mangled name. | |
94af9270 | 10010 | |
af6b7be1 JB |
10011 | For Ada, return the DIE's linkage name rather than the fully qualified |
10012 | name. PHYSNAME is ignored.. | |
10013 | ||
94af9270 KS |
10014 | The result is allocated on the objfile_obstack and canonicalized. */ |
10015 | ||
10016 | static const char * | |
15d034d0 TT |
10017 | dwarf2_compute_name (const char *name, |
10018 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
10019 | int physname) |
10020 | { | |
518817b3 | 10021 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
bb5ed363 | 10022 | |
94af9270 KS |
10023 | if (name == NULL) |
10024 | name = dwarf2_name (die, cu); | |
10025 | ||
2ee7123e DE |
10026 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
10027 | but otherwise compute it by typename_concat inside GDB. | |
10028 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 10029 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 10030 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
10031 | will set the demangled name to the result of dwarf2_full_name, and it is |
10032 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
10033 | if (cu->language == language_ada |
10034 | || (cu->language == language_fortran && physname)) | |
10035 | { | |
10036 | /* For Ada unit, we prefer the linkage name over the name, as | |
10037 | the former contains the exported name, which the user expects | |
10038 | to be able to reference. Ideally, we want the user to be able | |
10039 | to reference this entity using either natural or linkage name, | |
10040 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 10041 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 10042 | |
2ee7123e DE |
10043 | if (linkage_name != NULL) |
10044 | return linkage_name; | |
f55ee35c JK |
10045 | } |
10046 | ||
94af9270 KS |
10047 | /* These are the only languages we know how to qualify names in. */ |
10048 | if (name != NULL | |
9c37b5ae | 10049 | && (cu->language == language_cplus |
c44af4eb TT |
10050 | || cu->language == language_fortran || cu->language == language_d |
10051 | || cu->language == language_rust)) | |
94af9270 KS |
10052 | { |
10053 | if (die_needs_namespace (die, cu)) | |
10054 | { | |
0d5cff50 | 10055 | const char *prefix; |
34a68019 | 10056 | const char *canonical_name = NULL; |
94af9270 | 10057 | |
d7e74731 PA |
10058 | string_file buf; |
10059 | ||
94af9270 | 10060 | prefix = determine_prefix (die, cu); |
94af9270 KS |
10061 | if (*prefix != '\0') |
10062 | { | |
43816ebc TT |
10063 | gdb::unique_xmalloc_ptr<char> prefixed_name |
10064 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 10065 | |
43816ebc | 10066 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
10067 | } |
10068 | else | |
d7e74731 | 10069 | buf.puts (name); |
94af9270 | 10070 | |
98bfdba5 PA |
10071 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
10072 | as children with DW_TAG_template_type_param or | |
10073 | DW_TAG_value_type_param. If the latter, add them to the name | |
10074 | here. If the name already has template parameters, then | |
10075 | skip this step; some versions of GCC emit both, and | |
10076 | it is more efficient to use the pre-computed name. | |
10077 | ||
10078 | Something to keep in mind about this process: it is very | |
10079 | unlikely, or in some cases downright impossible, to produce | |
10080 | something that will match the mangled name of a function. | |
10081 | If the definition of the function has the same debug info, | |
10082 | we should be able to match up with it anyway. But fallbacks | |
10083 | using the minimal symbol, for instance to find a method | |
10084 | implemented in a stripped copy of libstdc++, will not work. | |
10085 | If we do not have debug info for the definition, we will have to | |
10086 | match them up some other way. | |
10087 | ||
10088 | When we do name matching there is a related problem with function | |
10089 | templates; two instantiated function templates are allowed to | |
10090 | differ only by their return types, which we do not add here. */ | |
10091 | ||
10092 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
10093 | { | |
10094 | struct attribute *attr; | |
10095 | struct die_info *child; | |
10096 | int first = 1; | |
10097 | ||
10098 | die->building_fullname = 1; | |
10099 | ||
10100 | for (child = die->child; child != NULL; child = child->sibling) | |
10101 | { | |
10102 | struct type *type; | |
12df843f | 10103 | LONGEST value; |
d521ce57 | 10104 | const gdb_byte *bytes; |
98bfdba5 PA |
10105 | struct dwarf2_locexpr_baton *baton; |
10106 | struct value *v; | |
10107 | ||
10108 | if (child->tag != DW_TAG_template_type_param | |
10109 | && child->tag != DW_TAG_template_value_param) | |
10110 | continue; | |
10111 | ||
10112 | if (first) | |
10113 | { | |
d7e74731 | 10114 | buf.puts ("<"); |
98bfdba5 PA |
10115 | first = 0; |
10116 | } | |
10117 | else | |
d7e74731 | 10118 | buf.puts (", "); |
98bfdba5 PA |
10119 | |
10120 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
10121 | if (attr == NULL) | |
10122 | { | |
b98664d3 | 10123 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 10124 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
10125 | continue; |
10126 | } | |
10127 | type = die_type (child, cu); | |
10128 | ||
10129 | if (child->tag == DW_TAG_template_type_param) | |
10130 | { | |
c1ec8cea TT |
10131 | c_print_type (type, "", &buf, -1, 0, cu->language, |
10132 | &type_print_raw_options); | |
98bfdba5 PA |
10133 | continue; |
10134 | } | |
10135 | ||
10136 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
10137 | if (attr == NULL) | |
10138 | { | |
b98664d3 | 10139 | complaint (_("template parameter missing " |
3e43a32a | 10140 | "DW_AT_const_value")); |
d7e74731 | 10141 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
10142 | continue; |
10143 | } | |
10144 | ||
10145 | dwarf2_const_value_attr (attr, type, name, | |
10146 | &cu->comp_unit_obstack, cu, | |
10147 | &value, &bytes, &baton); | |
10148 | ||
10149 | if (TYPE_NOSIGN (type)) | |
10150 | /* GDB prints characters as NUMBER 'CHAR'. If that's | |
10151 | changed, this can use value_print instead. */ | |
d7e74731 | 10152 | c_printchar (value, type, &buf); |
98bfdba5 PA |
10153 | else |
10154 | { | |
10155 | struct value_print_options opts; | |
10156 | ||
10157 | if (baton != NULL) | |
10158 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
10159 | baton->data, | |
10160 | baton->size, | |
10161 | baton->per_cu); | |
10162 | else if (bytes != NULL) | |
10163 | { | |
10164 | v = allocate_value (type); | |
10165 | memcpy (value_contents_writeable (v), bytes, | |
10166 | TYPE_LENGTH (type)); | |
10167 | } | |
10168 | else | |
10169 | v = value_from_longest (type, value); | |
10170 | ||
3e43a32a MS |
10171 | /* Specify decimal so that we do not depend on |
10172 | the radix. */ | |
98bfdba5 PA |
10173 | get_formatted_print_options (&opts, 'd'); |
10174 | opts.raw = 1; | |
d7e74731 | 10175 | value_print (v, &buf, &opts); |
98bfdba5 | 10176 | release_value (v); |
98bfdba5 PA |
10177 | } |
10178 | } | |
10179 | ||
10180 | die->building_fullname = 0; | |
10181 | ||
10182 | if (!first) | |
10183 | { | |
10184 | /* Close the argument list, with a space if necessary | |
10185 | (nested templates). */ | |
d7e74731 PA |
10186 | if (!buf.empty () && buf.string ().back () == '>') |
10187 | buf.puts (" >"); | |
98bfdba5 | 10188 | else |
d7e74731 | 10189 | buf.puts (">"); |
98bfdba5 PA |
10190 | } |
10191 | } | |
10192 | ||
9c37b5ae | 10193 | /* For C++ methods, append formal parameter type |
94af9270 | 10194 | information, if PHYSNAME. */ |
6e70227d | 10195 | |
94af9270 | 10196 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 10197 | && cu->language == language_cplus) |
94af9270 KS |
10198 | { |
10199 | struct type *type = read_type_die (die, cu); | |
10200 | ||
d7e74731 | 10201 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 10202 | &type_print_raw_options); |
94af9270 | 10203 | |
9c37b5ae | 10204 | if (cu->language == language_cplus) |
94af9270 | 10205 | { |
60430eff DJ |
10206 | /* Assume that an artificial first parameter is |
10207 | "this", but do not crash if it is not. RealView | |
10208 | marks unnamed (and thus unused) parameters as | |
10209 | artificial; there is no way to differentiate | |
10210 | the two cases. */ | |
94af9270 KS |
10211 | if (TYPE_NFIELDS (type) > 0 |
10212 | && TYPE_FIELD_ARTIFICIAL (type, 0) | |
60430eff | 10213 | && TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_PTR |
3e43a32a MS |
10214 | && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, |
10215 | 0)))) | |
d7e74731 | 10216 | buf.puts (" const"); |
94af9270 KS |
10217 | } |
10218 | } | |
10219 | ||
d7e74731 | 10220 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
10221 | |
10222 | if (cu->language == language_cplus) | |
34a68019 | 10223 | canonical_name |
322a8516 | 10224 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
be1e3d3e | 10225 | objfile); |
34a68019 TT |
10226 | |
10227 | /* If we only computed INTERMEDIATE_NAME, or if | |
10228 | INTERMEDIATE_NAME is already canonical, then we need to | |
be1e3d3e | 10229 | intern it. */ |
322a8516 | 10230 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
be1e3d3e | 10231 | name = objfile->intern (intermediate_name); |
34a68019 TT |
10232 | else |
10233 | name = canonical_name; | |
94af9270 KS |
10234 | } |
10235 | } | |
10236 | ||
10237 | return name; | |
10238 | } | |
10239 | ||
0114d602 DJ |
10240 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10241 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10242 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10243 | not have a name. NAME may either be from a previous call to |
10244 | dwarf2_name or NULL. | |
10245 | ||
9c37b5ae | 10246 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
10247 | |
10248 | static const char * | |
15d034d0 | 10249 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10250 | { |
94af9270 KS |
10251 | return dwarf2_compute_name (name, die, cu, 0); |
10252 | } | |
0114d602 | 10253 | |
94af9270 KS |
10254 | /* Construct a physname for the given DIE in CU. NAME may either be |
10255 | from a previous call to dwarf2_name or NULL. The result will be | |
10256 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10257 | name. | |
0114d602 | 10258 | |
9c37b5ae | 10259 | The output string will be canonicalized (if C++). */ |
0114d602 | 10260 | |
94af9270 | 10261 | static const char * |
15d034d0 | 10262 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10263 | { |
518817b3 | 10264 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
900e11f9 | 10265 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10266 | int need_copy = 1; |
10267 | ||
10268 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10269 | on its own. */ | |
10270 | if (!die_needs_namespace (die, cu)) | |
10271 | return dwarf2_compute_name (name, die, cu, 1); | |
10272 | ||
73b9be8b | 10273 | mangled = dw2_linkage_name (die, cu); |
900e11f9 | 10274 | |
e98c9e7c TT |
10275 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
10276 | See https://github.com/rust-lang/rust/issues/32925. */ | |
10277 | if (cu->language == language_rust && mangled != NULL | |
10278 | && strchr (mangled, '{') != NULL) | |
10279 | mangled = NULL; | |
10280 | ||
900e11f9 JK |
10281 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB |
10282 | has computed. */ | |
791afaa2 | 10283 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10284 | if (mangled != NULL) |
900e11f9 | 10285 | { |
900e11f9 | 10286 | |
59cc4834 JB |
10287 | if (language_def (cu->language)->la_store_sym_names_in_linkage_form_p) |
10288 | { | |
10289 | /* Do nothing (do not demangle the symbol name). */ | |
10290 | } | |
10291 | else if (cu->language == language_go) | |
a766d390 | 10292 | { |
5e2db402 TT |
10293 | /* This is a lie, but we already lie to the caller new_symbol. |
10294 | new_symbol assumes we return the mangled name. | |
a766d390 | 10295 | This just undoes that lie until things are cleaned up. */ |
a766d390 DE |
10296 | } |
10297 | else | |
10298 | { | |
0eb876f5 JB |
10299 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10300 | their return type. It is easier for GDB users to search | |
10301 | for such functions as `name(params)' than `long name(params)'. | |
10302 | In such case the minimal symbol names do not match the full | |
10303 | symbol names but for template functions there is never a need | |
10304 | to look up their definition from their declaration so | |
10305 | the only disadvantage remains the minimal symbol variant | |
10306 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
10307 | demangled.reset (gdb_demangle (mangled, |
10308 | (DMGL_PARAMS | DMGL_ANSI | |
10309 | | DMGL_RET_DROP))); | |
a766d390 | 10310 | } |
900e11f9 | 10311 | if (demangled) |
791afaa2 | 10312 | canon = demangled.get (); |
900e11f9 JK |
10313 | else |
10314 | { | |
10315 | canon = mangled; | |
10316 | need_copy = 0; | |
10317 | } | |
10318 | } | |
10319 | ||
10320 | if (canon == NULL || check_physname) | |
10321 | { | |
10322 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
10323 | ||
10324 | if (canon != NULL && strcmp (physname, canon) != 0) | |
10325 | { | |
10326 | /* It may not mean a bug in GDB. The compiler could also | |
10327 | compute DW_AT_linkage_name incorrectly. But in such case | |
10328 | GDB would need to be bug-to-bug compatible. */ | |
10329 | ||
b98664d3 | 10330 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
10331 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
10332 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 10333 | objfile_name (objfile)); |
900e11f9 JK |
10334 | |
10335 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
10336 | is available here - over computed PHYSNAME. It is safer | |
10337 | against both buggy GDB and buggy compilers. */ | |
10338 | ||
10339 | retval = canon; | |
10340 | } | |
10341 | else | |
10342 | { | |
10343 | retval = physname; | |
10344 | need_copy = 0; | |
10345 | } | |
10346 | } | |
10347 | else | |
10348 | retval = canon; | |
10349 | ||
10350 | if (need_copy) | |
be1e3d3e | 10351 | retval = objfile->intern (retval); |
900e11f9 | 10352 | |
900e11f9 | 10353 | return retval; |
0114d602 DJ |
10354 | } |
10355 | ||
74921315 KS |
10356 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
10357 | a new symbol for it. | |
10358 | ||
10359 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
10360 | ||
10361 | static int | |
10362 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
10363 | { | |
10364 | struct attribute *attr; | |
10365 | ||
10366 | /* If the die does not have a name, this is not a namespace | |
10367 | alias. */ | |
10368 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
10369 | if (attr != NULL) | |
10370 | { | |
10371 | int num; | |
10372 | struct die_info *d = die; | |
10373 | struct dwarf2_cu *imported_cu = cu; | |
10374 | ||
10375 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
10376 | keep inspecting DIEs until we hit the underlying import. */ | |
10377 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
10378 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
10379 | { | |
10380 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10381 | if (attr == NULL) | |
10382 | break; | |
10383 | ||
10384 | d = follow_die_ref (d, attr, &imported_cu); | |
10385 | if (d->tag != DW_TAG_imported_declaration) | |
10386 | break; | |
10387 | } | |
10388 | ||
10389 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10390 | { | |
b98664d3 | 10391 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 10392 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
10393 | return 0; |
10394 | } | |
10395 | ||
10396 | if (attr != NULL) | |
10397 | { | |
10398 | struct type *type; | |
9c541725 | 10399 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
74921315 | 10400 | |
9c541725 | 10401 | type = get_die_type_at_offset (sect_off, cu->per_cu); |
74921315 KS |
10402 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_NAMESPACE) |
10403 | { | |
10404 | /* This declaration is a global namespace alias. Add | |
10405 | a symbol for it whose type is the aliased namespace. */ | |
10406 | new_symbol (die, type, cu); | |
10407 | return 1; | |
10408 | } | |
10409 | } | |
10410 | } | |
10411 | ||
10412 | return 0; | |
10413 | } | |
10414 | ||
22cee43f | 10415 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 10416 | current context for CU. |
22cee43f PMR |
10417 | |
10418 | For Ada, imported declarations can materialize renamings, which *may* be | |
10419 | global. However it is impossible (for now?) in DWARF to distinguish | |
10420 | "external" imported declarations and "static" ones. As all imported | |
10421 | declarations seem to be static in all other languages, make them all CU-wide | |
10422 | global only in Ada. */ | |
10423 | ||
10424 | static struct using_direct ** | |
804d2729 | 10425 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 10426 | { |
c24bdb02 KS |
10427 | if (cu->language == language_ada |
10428 | && cu->get_builder ()->outermost_context_p ()) | |
10429 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 10430 | else |
c24bdb02 | 10431 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
10432 | } |
10433 | ||
27aa8d6a SW |
10434 | /* Read the import statement specified by the given die and record it. */ |
10435 | ||
10436 | static void | |
10437 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10438 | { | |
518817b3 | 10439 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
27aa8d6a | 10440 | struct attribute *import_attr; |
32019081 | 10441 | struct die_info *imported_die, *child_die; |
de4affc9 | 10442 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10443 | const char *imported_name; |
794684b6 | 10444 | const char *imported_name_prefix; |
13387711 SW |
10445 | const char *canonical_name; |
10446 | const char *import_alias; | |
10447 | const char *imported_declaration = NULL; | |
794684b6 | 10448 | const char *import_prefix; |
eb1e02fd | 10449 | std::vector<const char *> excludes; |
13387711 | 10450 | |
27aa8d6a SW |
10451 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10452 | if (import_attr == NULL) | |
10453 | { | |
b98664d3 | 10454 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
10455 | dwarf_tag_name (die->tag)); |
10456 | return; | |
10457 | } | |
10458 | ||
de4affc9 CC |
10459 | imported_cu = cu; |
10460 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10461 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10462 | if (imported_name == NULL) |
10463 | { | |
10464 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10465 | ||
10466 | The import in the following code: | |
10467 | namespace A | |
10468 | { | |
10469 | typedef int B; | |
10470 | } | |
10471 | ||
10472 | int main () | |
10473 | { | |
10474 | using A::B; | |
10475 | B b; | |
10476 | return b; | |
10477 | } | |
10478 | ||
10479 | ... | |
10480 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10481 | <52> DW_AT_decl_file : 1 | |
10482 | <53> DW_AT_decl_line : 6 | |
10483 | <54> DW_AT_import : <0x75> | |
10484 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10485 | <59> DW_AT_name : B | |
10486 | <5b> DW_AT_decl_file : 1 | |
10487 | <5c> DW_AT_decl_line : 2 | |
10488 | <5d> DW_AT_type : <0x6e> | |
10489 | ... | |
10490 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10491 | <76> DW_AT_byte_size : 4 | |
10492 | <77> DW_AT_encoding : 5 (signed) | |
10493 | ||
10494 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10495 | This case will be ignored until the gcc bug is fixed. */ | |
10496 | return; | |
10497 | } | |
10498 | ||
82856980 SW |
10499 | /* Figure out the local name after import. */ |
10500 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10501 | |
794684b6 SW |
10502 | /* Figure out where the statement is being imported to. */ |
10503 | import_prefix = determine_prefix (die, cu); | |
10504 | ||
10505 | /* Figure out what the scope of the imported die is and prepend it | |
10506 | to the name of the imported die. */ | |
de4affc9 | 10507 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10508 | |
f55ee35c JK |
10509 | if (imported_die->tag != DW_TAG_namespace |
10510 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10511 | { |
13387711 SW |
10512 | imported_declaration = imported_name; |
10513 | canonical_name = imported_name_prefix; | |
794684b6 | 10514 | } |
13387711 | 10515 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10516 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10517 | imported_name_prefix, |
10518 | (cu->language == language_d ? "." : "::"), | |
10519 | imported_name, (char *) NULL); | |
13387711 SW |
10520 | else |
10521 | canonical_name = imported_name; | |
794684b6 | 10522 | |
32019081 JK |
10523 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10524 | for (child_die = die->child; child_die && child_die->tag; | |
10525 | child_die = sibling_die (child_die)) | |
10526 | { | |
10527 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10528 | represented by an imported module entry with an import attribute | |
10529 | referring to the module and owned entries corresponding to those | |
10530 | entities that are renamed as part of being imported. */ | |
10531 | ||
10532 | if (child_die->tag != DW_TAG_imported_declaration) | |
10533 | { | |
b98664d3 | 10534 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
10535 | "- DIE at %s [in module %s]"), |
10536 | sect_offset_str (child_die->sect_off), | |
10537 | objfile_name (objfile)); | |
32019081 JK |
10538 | continue; |
10539 | } | |
10540 | ||
10541 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10542 | if (import_attr == NULL) | |
10543 | { | |
b98664d3 | 10544 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
10545 | dwarf_tag_name (child_die->tag)); |
10546 | continue; | |
10547 | } | |
10548 | ||
10549 | imported_cu = cu; | |
10550 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10551 | &imported_cu); | |
10552 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10553 | if (imported_name == NULL) | |
10554 | { | |
b98664d3 | 10555 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
10556 | "imported name - DIE at %s [in module %s]"), |
10557 | sect_offset_str (child_die->sect_off), | |
10558 | objfile_name (objfile)); | |
32019081 JK |
10559 | continue; |
10560 | } | |
10561 | ||
eb1e02fd | 10562 | excludes.push_back (imported_name); |
32019081 JK |
10563 | |
10564 | process_die (child_die, cu); | |
10565 | } | |
10566 | ||
804d2729 | 10567 | add_using_directive (using_directives (cu), |
22cee43f PMR |
10568 | import_prefix, |
10569 | canonical_name, | |
10570 | import_alias, | |
10571 | imported_declaration, | |
10572 | excludes, | |
10573 | 0, | |
10574 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10575 | } |
10576 | ||
5230b05a WT |
10577 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10578 | types, but gives them a size of zero. Starting with version 14, | |
10579 | ICC is compatible with GCC. */ | |
10580 | ||
9068261f | 10581 | static bool |
5230b05a WT |
10582 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
10583 | { | |
10584 | if (!cu->checked_producer) | |
10585 | check_producer (cu); | |
10586 | ||
10587 | return cu->producer_is_icc_lt_14; | |
10588 | } | |
10589 | ||
eb77c9df AB |
10590 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
10591 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
10592 | which says that void functions should not have a DW_AT_type. */ | |
10593 | ||
10594 | static bool | |
10595 | producer_is_icc (struct dwarf2_cu *cu) | |
10596 | { | |
10597 | if (!cu->checked_producer) | |
10598 | check_producer (cu); | |
10599 | ||
10600 | return cu->producer_is_icc; | |
10601 | } | |
10602 | ||
1b80a9fa JK |
10603 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10604 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10605 | this, it was first present in GCC release 4.3.0. */ | |
10606 | ||
9068261f | 10607 | static bool |
1b80a9fa JK |
10608 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
10609 | { | |
10610 | if (!cu->checked_producer) | |
10611 | check_producer (cu); | |
10612 | ||
10613 | return cu->producer_is_gcc_lt_4_3; | |
10614 | } | |
10615 | ||
d721ba37 PA |
10616 | static file_and_directory |
10617 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10618 | { |
d721ba37 PA |
10619 | file_and_directory res; |
10620 | ||
9291a0cd TT |
10621 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10622 | is not a source language identifier. */ | |
d721ba37 PA |
10623 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10624 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10625 | |
d721ba37 PA |
10626 | if (res.comp_dir == NULL |
10627 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10628 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10629 | { |
d721ba37 PA |
10630 | res.comp_dir_storage = ldirname (res.name); |
10631 | if (!res.comp_dir_storage.empty ()) | |
10632 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10633 | } |
d721ba37 | 10634 | if (res.comp_dir != NULL) |
9291a0cd TT |
10635 | { |
10636 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10637 | directory, get rid of it. */ | |
d721ba37 | 10638 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10639 | |
d721ba37 PA |
10640 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10641 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10642 | } |
10643 | ||
d721ba37 PA |
10644 | if (res.name == NULL) |
10645 | res.name = "<unknown>"; | |
10646 | ||
10647 | return res; | |
9291a0cd TT |
10648 | } |
10649 | ||
f4dc4d17 DE |
10650 | /* Handle DW_AT_stmt_list for a compilation unit. |
10651 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10652 | COMP_DIR is the compilation directory. LOWPC is passed to |
10653 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10654 | |
10655 | static void | |
10656 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10657 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10658 | { |
518817b3 SM |
10659 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10660 | = cu->per_cu->dwarf2_per_objfile; | |
2ab95328 | 10661 | struct attribute *attr; |
527f3840 JK |
10662 | struct line_header line_header_local; |
10663 | hashval_t line_header_local_hash; | |
527f3840 JK |
10664 | void **slot; |
10665 | int decode_mapping; | |
2ab95328 | 10666 | |
f4dc4d17 DE |
10667 | gdb_assert (! cu->per_cu->is_debug_types); |
10668 | ||
2ab95328 | 10669 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
527f3840 JK |
10670 | if (attr == NULL) |
10671 | return; | |
10672 | ||
9c541725 | 10673 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
527f3840 JK |
10674 | |
10675 | /* The line header hash table is only created if needed (it exists to | |
10676 | prevent redundant reading of the line table for partial_units). | |
10677 | If we're given a partial_unit, we'll need it. If we're given a | |
10678 | compile_unit, then use the line header hash table if it's already | |
10679 | created, but don't create one just yet. */ | |
10680 | ||
10681 | if (dwarf2_per_objfile->line_header_hash == NULL | |
10682 | && die->tag == DW_TAG_partial_unit) | |
2ab95328 | 10683 | { |
527f3840 | 10684 | dwarf2_per_objfile->line_header_hash |
d15acc42 TT |
10685 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
10686 | line_header_eq_voidp, | |
10687 | free_line_header_voidp, | |
10688 | xcalloc, xfree)); | |
527f3840 | 10689 | } |
2ab95328 | 10690 | |
9c541725 | 10691 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10692 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10693 | line_header_local_hash = line_header_hash (&line_header_local); | |
10694 | if (dwarf2_per_objfile->line_header_hash != NULL) | |
10695 | { | |
d15acc42 | 10696 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10697 | &line_header_local, |
10698 | line_header_local_hash, NO_INSERT); | |
10699 | ||
10700 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10701 | is not present in *SLOT (since if there is something in *SLOT then | |
10702 | it will be for a partial_unit). */ | |
10703 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10704 | { |
527f3840 | 10705 | gdb_assert (*slot != NULL); |
9a3c8263 | 10706 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10707 | return; |
dee91e82 | 10708 | } |
2ab95328 | 10709 | } |
527f3840 JK |
10710 | |
10711 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10712 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10713 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10714 | if (lh == NULL) | |
527f3840 | 10715 | return; |
4c8aa72d PA |
10716 | |
10717 | cu->line_header = lh.release (); | |
10718 | cu->line_header_die_owner = die; | |
527f3840 JK |
10719 | |
10720 | if (dwarf2_per_objfile->line_header_hash == NULL) | |
10721 | slot = NULL; | |
10722 | else | |
10723 | { | |
d15acc42 | 10724 | slot = htab_find_slot_with_hash (dwarf2_per_objfile->line_header_hash.get (), |
527f3840 JK |
10725 | &line_header_local, |
10726 | line_header_local_hash, INSERT); | |
10727 | gdb_assert (slot != NULL); | |
10728 | } | |
10729 | if (slot != NULL && *slot == NULL) | |
10730 | { | |
10731 | /* This newly decoded line number information unit will be owned | |
10732 | by line_header_hash hash table. */ | |
10733 | *slot = cu->line_header; | |
4c8aa72d | 10734 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10735 | } |
10736 | else | |
10737 | { | |
10738 | /* We cannot free any current entry in (*slot) as that struct line_header | |
10739 | may be already used by multiple CUs. Create only temporary decoded | |
10740 | line_header for this CU - it may happen at most once for each line | |
10741 | number information unit. And if we're not using line_header_hash | |
10742 | then this is what we want as well. */ | |
10743 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10744 | } |
10745 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10746 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10747 | decode_mapping); | |
fff8551c | 10748 | |
2ab95328 TT |
10749 | } |
10750 | ||
95554aad | 10751 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10752 | |
c906108c | 10753 | static void |
e7c27a73 | 10754 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10755 | { |
518817b3 SM |
10756 | struct dwarf2_per_objfile *dwarf2_per_objfile |
10757 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 10758 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 10759 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
2acceee2 | 10760 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10761 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10762 | struct attribute *attr; | |
c906108c | 10763 | struct die_info *child_die; |
e142c38c | 10764 | CORE_ADDR baseaddr; |
6e70227d | 10765 | |
380618d6 | 10766 | prepare_one_comp_unit (cu, die, cu->language); |
b3b3bada | 10767 | baseaddr = objfile->text_section_offset (); |
c906108c | 10768 | |
fae299cd | 10769 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10770 | |
10771 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10772 | from finish_block. */ | |
2acceee2 | 10773 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10774 | lowpc = highpc; |
3e29f34a | 10775 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10776 | |
d721ba37 | 10777 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10778 | |
f4b8a18d KW |
10779 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10780 | standardised yet. As a workaround for the language detection we fall | |
10781 | back to the DW_AT_producer string. */ | |
10782 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10783 | cu->language = language_opencl; | |
10784 | ||
3019eac3 DE |
10785 | /* Similar hack for Go. */ |
10786 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10787 | set_cu_language (DW_LANG_Go, cu); | |
10788 | ||
c24bdb02 | 10789 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10790 | |
10791 | /* Decode line number information if present. We do this before | |
10792 | processing child DIEs, so that the line header table is available | |
10793 | for DW_AT_decl_file. */ | |
d721ba37 | 10794 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10795 | |
10796 | /* Process all dies in compilation unit. */ | |
10797 | if (die->child != NULL) | |
10798 | { | |
10799 | child_die = die->child; | |
10800 | while (child_die && child_die->tag) | |
10801 | { | |
10802 | process_die (child_die, cu); | |
10803 | child_die = sibling_die (child_die); | |
10804 | } | |
10805 | } | |
10806 | ||
10807 | /* Decode macro information, if present. Dwarf 2 macro information | |
10808 | refers to information in the line number info statement program | |
10809 | header, so we can only read it if we've read the header | |
10810 | successfully. */ | |
0af92d60 JK |
10811 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10812 | if (attr == NULL) | |
10813 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
3019eac3 DE |
10814 | if (attr && cu->line_header) |
10815 | { | |
10816 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 10817 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10818 | |
43f3e411 | 10819 | dwarf_decode_macros (cu, DW_UNSND (attr), 1); |
3019eac3 DE |
10820 | } |
10821 | else | |
10822 | { | |
10823 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
10824 | if (attr && cu->line_header) | |
10825 | { | |
10826 | unsigned int macro_offset = DW_UNSND (attr); | |
10827 | ||
43f3e411 | 10828 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10829 | } |
10830 | } | |
3019eac3 DE |
10831 | } |
10832 | ||
c24bdb02 KS |
10833 | void |
10834 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 10835 | { |
f4dc4d17 DE |
10836 | struct type_unit_group *tu_group; |
10837 | int first_time; | |
3019eac3 | 10838 | struct attribute *attr; |
9c541725 | 10839 | unsigned int i; |
0186c6a7 | 10840 | struct signatured_type *sig_type; |
3019eac3 | 10841 | |
f4dc4d17 | 10842 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10843 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10844 | |
c24bdb02 | 10845 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 10846 | |
f4dc4d17 | 10847 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10848 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 10849 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 10850 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 10851 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
10852 | |
10853 | /* If we've already processed this stmt_list there's no real need to | |
10854 | do it again, we could fake it and just recreate the part we need | |
10855 | (file name,index -> symtab mapping). If data shows this optimization | |
10856 | is useful we can do it then. */ | |
43f3e411 | 10857 | first_time = tu_group->compunit_symtab == NULL; |
f4dc4d17 DE |
10858 | |
10859 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10860 | debug info. */ | |
fff8551c | 10861 | line_header_up lh; |
f4dc4d17 | 10862 | if (attr != NULL) |
3019eac3 | 10863 | { |
9c541725 | 10864 | sect_offset line_offset = (sect_offset) DW_UNSND (attr); |
c24bdb02 | 10865 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
10866 | } |
10867 | if (lh == NULL) | |
10868 | { | |
10869 | if (first_time) | |
c24bdb02 | 10870 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
10871 | else |
10872 | { | |
10873 | gdb_assert (tu_group->symtabs == NULL); | |
c24bdb02 | 10874 | gdb_assert (m_builder == nullptr); |
804d2729 | 10875 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10876 | m_builder.reset (new struct buildsym_compunit |
10877 | (COMPUNIT_OBJFILE (cust), "", | |
10878 | COMPUNIT_DIRNAME (cust), | |
10879 | compunit_language (cust), | |
10880 | 0, cust)); | |
f4dc4d17 | 10881 | } |
f4dc4d17 | 10882 | return; |
3019eac3 DE |
10883 | } |
10884 | ||
c24bdb02 KS |
10885 | line_header = lh.release (); |
10886 | line_header_die_owner = die; | |
3019eac3 | 10887 | |
f4dc4d17 DE |
10888 | if (first_time) |
10889 | { | |
c24bdb02 | 10890 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 10891 | |
1fd60fc0 DE |
10892 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10893 | still initializing it, and our caller (a few levels up) | |
10894 | process_full_type_unit still needs to know if this is the first | |
10895 | time. */ | |
10896 | ||
4ac93832 TT |
10897 | tu_group->symtabs |
10898 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, | |
10899 | struct symtab *, line_header->file_names_size ()); | |
3019eac3 | 10900 | |
7ba99d21 AT |
10901 | auto &file_names = line_header->file_names (); |
10902 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10903 | { |
7ba99d21 | 10904 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
10905 | dwarf2_start_subfile (this, fe.name, |
10906 | fe.include_dir (line_header)); | |
10907 | buildsym_compunit *b = get_builder (); | |
10908 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 10909 | { |
4c8aa72d PA |
10910 | /* NOTE: start_subfile will recognize when it's been |
10911 | passed a file it has already seen. So we can't | |
10912 | assume there's a simple mapping from | |
10913 | cu->line_header->file_names to subfiles, plus | |
10914 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
10915 | b->get_current_subfile ()->symtab |
10916 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
10917 | } |
10918 | ||
c24bdb02 | 10919 | fe.symtab = b->get_current_subfile ()->symtab; |
8c43009f | 10920 | tu_group->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
10921 | } |
10922 | } | |
10923 | else | |
3019eac3 | 10924 | { |
c24bdb02 | 10925 | gdb_assert (m_builder == nullptr); |
804d2729 | 10926 | struct compunit_symtab *cust = tu_group->compunit_symtab; |
c24bdb02 KS |
10927 | m_builder.reset (new struct buildsym_compunit |
10928 | (COMPUNIT_OBJFILE (cust), "", | |
10929 | COMPUNIT_DIRNAME (cust), | |
10930 | compunit_language (cust), | |
10931 | 0, cust)); | |
f4dc4d17 | 10932 | |
7ba99d21 AT |
10933 | auto &file_names = line_header->file_names (); |
10934 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10935 | { |
7ba99d21 | 10936 | file_entry &fe = file_names[i]; |
4c8aa72d | 10937 | fe.symtab = tu_group->symtabs[i]; |
f4dc4d17 | 10938 | } |
3019eac3 DE |
10939 | } |
10940 | ||
f4dc4d17 DE |
10941 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10942 | so they don't have a "real" (so to speak) symtab anyway. | |
10943 | There is later code that will assign the main symtab to all symbols | |
10944 | that don't have one. We need to handle the case of a symbol with a | |
10945 | missing symtab (DW_AT_decl_file) anyway. */ | |
10946 | } | |
3019eac3 | 10947 | |
f4dc4d17 DE |
10948 | /* Process DW_TAG_type_unit. |
10949 | For TUs we want to skip the first top level sibling if it's not the | |
10950 | actual type being defined by this TU. In this case the first top | |
10951 | level sibling is there to provide context only. */ | |
3019eac3 | 10952 | |
f4dc4d17 DE |
10953 | static void |
10954 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10955 | { | |
10956 | struct die_info *child_die; | |
3019eac3 | 10957 | |
f4dc4d17 DE |
10958 | prepare_one_comp_unit (cu, die, language_minimal); |
10959 | ||
10960 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10961 | We do this before processing child DIEs, so that the line header table | |
10962 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 10963 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
10964 | |
10965 | if (die->child != NULL) | |
10966 | { | |
10967 | child_die = die->child; | |
10968 | while (child_die && child_die->tag) | |
10969 | { | |
10970 | process_die (child_die, cu); | |
10971 | child_die = sibling_die (child_die); | |
10972 | } | |
10973 | } | |
3019eac3 DE |
10974 | } |
10975 | \f | |
80626a55 DE |
10976 | /* DWO/DWP files. |
10977 | ||
10978 | http://gcc.gnu.org/wiki/DebugFission | |
10979 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10980 | ||
10981 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10982 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10983 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10984 | |
10985 | static hashval_t | |
10986 | hash_dwo_file (const void *item) | |
10987 | { | |
9a3c8263 | 10988 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10989 | hashval_t hash; |
3019eac3 | 10990 | |
a2ce51a0 DE |
10991 | hash = htab_hash_string (dwo_file->dwo_name); |
10992 | if (dwo_file->comp_dir != NULL) | |
10993 | hash += htab_hash_string (dwo_file->comp_dir); | |
10994 | return hash; | |
3019eac3 DE |
10995 | } |
10996 | ||
10997 | static int | |
10998 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10999 | { | |
9a3c8263 SM |
11000 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
11001 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 11002 | |
a2ce51a0 DE |
11003 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
11004 | return 0; | |
11005 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
11006 | return lhs->comp_dir == rhs->comp_dir; | |
11007 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
11008 | } |
11009 | ||
11010 | /* Allocate a hash table for DWO files. */ | |
11011 | ||
51ac9db5 | 11012 | static htab_up |
298e9637 | 11013 | allocate_dwo_file_hash_table () |
3019eac3 | 11014 | { |
51ac9db5 SM |
11015 | auto delete_dwo_file = [] (void *item) |
11016 | { | |
11017 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
11018 | ||
11019 | delete dwo_file; | |
11020 | }; | |
11021 | ||
bc68fb19 TT |
11022 | return htab_up (htab_create_alloc (41, |
11023 | hash_dwo_file, | |
11024 | eq_dwo_file, | |
11025 | delete_dwo_file, | |
11026 | xcalloc, xfree)); | |
3019eac3 DE |
11027 | } |
11028 | ||
80626a55 DE |
11029 | /* Lookup DWO file DWO_NAME. */ |
11030 | ||
11031 | static void ** | |
ed2dc618 SM |
11032 | lookup_dwo_file_slot (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11033 | const char *dwo_name, | |
11034 | const char *comp_dir) | |
80626a55 DE |
11035 | { |
11036 | struct dwo_file find_entry; | |
11037 | void **slot; | |
11038 | ||
11039 | if (dwarf2_per_objfile->dwo_files == NULL) | |
298e9637 | 11040 | dwarf2_per_objfile->dwo_files = allocate_dwo_file_hash_table (); |
80626a55 | 11041 | |
0ac5b59e DE |
11042 | find_entry.dwo_name = dwo_name; |
11043 | find_entry.comp_dir = comp_dir; | |
51ac9db5 SM |
11044 | slot = htab_find_slot (dwarf2_per_objfile->dwo_files.get (), &find_entry, |
11045 | INSERT); | |
80626a55 DE |
11046 | |
11047 | return slot; | |
11048 | } | |
11049 | ||
3019eac3 DE |
11050 | static hashval_t |
11051 | hash_dwo_unit (const void *item) | |
11052 | { | |
9a3c8263 | 11053 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
11054 | |
11055 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
11056 | return dwo_unit->signature; | |
11057 | } | |
11058 | ||
11059 | static int | |
11060 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
11061 | { | |
9a3c8263 SM |
11062 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
11063 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
11064 | |
11065 | /* The signature is assumed to be unique within the DWO file. | |
11066 | So while object file CU dwo_id's always have the value zero, | |
11067 | that's OK, assuming each object file DWO file has only one CU, | |
11068 | and that's the rule for now. */ | |
11069 | return lhs->signature == rhs->signature; | |
11070 | } | |
11071 | ||
11072 | /* Allocate a hash table for DWO CUs,TUs. | |
11073 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
11074 | ||
b0b6a987 | 11075 | static htab_up |
298e9637 | 11076 | allocate_dwo_unit_table () |
3019eac3 DE |
11077 | { |
11078 | /* Start out with a pretty small number. | |
11079 | Generally DWO files contain only one CU and maybe some TUs. */ | |
b0b6a987 TT |
11080 | return htab_up (htab_create_alloc (3, |
11081 | hash_dwo_unit, | |
11082 | eq_dwo_unit, | |
11083 | NULL, xcalloc, xfree)); | |
3019eac3 DE |
11084 | } |
11085 | ||
19c3d4c9 | 11086 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
11087 | |
11088 | static void | |
19c3d4c9 DE |
11089 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
11090 | const gdb_byte *info_ptr, | |
11091 | struct die_info *comp_unit_die, | |
c0ab21c2 TT |
11092 | struct dwo_file *dwo_file, |
11093 | struct dwo_unit *dwo_unit) | |
3019eac3 DE |
11094 | { |
11095 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 11096 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 11097 | struct dwarf2_section_info *section = cu->per_cu->section; |
3019eac3 | 11098 | |
a084a2a6 AT |
11099 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
11100 | if (!signature.has_value ()) | |
3019eac3 | 11101 | { |
b98664d3 | 11102 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 11103 | " its dwo_id [in module %s]"), |
9d8780f0 | 11104 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
11105 | return; |
11106 | } | |
11107 | ||
3019eac3 | 11108 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 11109 | dwo_unit->signature = *signature; |
8a0459fd | 11110 | dwo_unit->section = section; |
9c541725 | 11111 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
11112 | dwo_unit->length = cu->per_cu->length; |
11113 | ||
b4f54984 | 11114 | if (dwarf_read_debug) |
9d8780f0 SM |
11115 | fprintf_unfiltered (gdb_stdlog, " offset %s, dwo_id %s\n", |
11116 | sect_offset_str (sect_off), | |
9c541725 | 11117 | hex_string (dwo_unit->signature)); |
3019eac3 DE |
11118 | } |
11119 | ||
33c5cd75 | 11120 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 11121 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 11122 | |
33c5cd75 | 11123 | static void |
ed2dc618 | 11124 | create_cus_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e | 11125 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
b0b6a987 | 11126 | dwarf2_section_info §ion, htab_up &cus_htab) |
3019eac3 DE |
11127 | { |
11128 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
d521ce57 | 11129 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 11130 | |
96b79293 | 11131 | section.read (objfile); |
33c5cd75 | 11132 | info_ptr = section.buffer; |
3019eac3 DE |
11133 | |
11134 | if (info_ptr == NULL) | |
33c5cd75 | 11135 | return; |
3019eac3 | 11136 | |
b4f54984 | 11137 | if (dwarf_read_debug) |
19c3d4c9 DE |
11138 | { |
11139 | fprintf_unfiltered (gdb_stdlog, "Reading %s for %s:\n", | |
96b79293 TT |
11140 | section.get_name (), |
11141 | section.get_file_name ()); | |
19c3d4c9 | 11142 | } |
3019eac3 | 11143 | |
33c5cd75 | 11144 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
11145 | while (info_ptr < end_ptr) |
11146 | { | |
11147 | struct dwarf2_per_cu_data per_cu; | |
c0ab21c2 | 11148 | struct dwo_unit read_unit {}; |
33c5cd75 DB |
11149 | struct dwo_unit *dwo_unit; |
11150 | void **slot; | |
11151 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 DE |
11152 | |
11153 | memset (&per_cu, 0, sizeof (per_cu)); | |
e3b94546 | 11154 | per_cu.dwarf2_per_objfile = dwarf2_per_objfile; |
3019eac3 | 11155 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
11156 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
11157 | per_cu.section = §ion; | |
11158 | ||
c0ab21c2 TT |
11159 | cutu_reader reader (&per_cu, cu, &dwo_file); |
11160 | if (!reader.dummy_p) | |
11161 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, | |
3e225074 | 11162 | &dwo_file, &read_unit); |
33c5cd75 DB |
11163 | info_ptr += per_cu.length; |
11164 | ||
11165 | // If the unit could not be parsed, skip it. | |
c0ab21c2 | 11166 | if (read_unit.dwo_file == NULL) |
33c5cd75 | 11167 | continue; |
3019eac3 | 11168 | |
33c5cd75 | 11169 | if (cus_htab == NULL) |
298e9637 | 11170 | cus_htab = allocate_dwo_unit_table (); |
19c3d4c9 | 11171 | |
33c5cd75 | 11172 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); |
c0ab21c2 | 11173 | *dwo_unit = read_unit; |
b0b6a987 | 11174 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
33c5cd75 DB |
11175 | gdb_assert (slot != NULL); |
11176 | if (*slot != NULL) | |
19c3d4c9 | 11177 | { |
33c5cd75 DB |
11178 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
11179 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 11180 | |
b98664d3 | 11181 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
11182 | " the entry at offset %s, signature %s"), |
11183 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 11184 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 11185 | } |
33c5cd75 | 11186 | *slot = (void *)dwo_unit; |
3019eac3 | 11187 | } |
3019eac3 DE |
11188 | } |
11189 | ||
80626a55 DE |
11190 | /* DWP file .debug_{cu,tu}_index section format: |
11191 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
11192 | ||
d2415c6c DE |
11193 | DWP Version 1: |
11194 | ||
80626a55 DE |
11195 | Both index sections have the same format, and serve to map a 64-bit |
11196 | signature to a set of section numbers. Each section begins with a header, | |
11197 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
11198 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
11199 | aligned at 8-byte boundaries in the file. | |
11200 | ||
d2415c6c DE |
11201 | The index section header consists of: |
11202 | ||
11203 | V, 32 bit version number | |
11204 | -, 32 bits unused | |
11205 | N, 32 bit number of compilation units or type units in the index | |
11206 | M, 32 bit number of slots in the hash table | |
80626a55 | 11207 | |
d2415c6c | 11208 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 11209 | |
d2415c6c DE |
11210 | The hash table begins at offset 16 in the section, and consists of an array |
11211 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
11212 | order of the application binary). Unused slots in the hash table are 0. | |
11213 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 11214 | |
d2415c6c DE |
11215 | The parallel table begins immediately after the hash table |
11216 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
11217 | array of 32-bit indexes (using the byte order of the application binary), | |
11218 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
11219 | table contains a 32-bit index into the pool of section numbers. For unused | |
11220 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 11221 | |
73869dc2 DE |
11222 | The pool of section numbers begins immediately following the hash table |
11223 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
11224 | section numbers consists of an array of 32-bit words (using the byte order | |
11225 | of the application binary). Each item in the array is indexed starting | |
11226 | from 0. The hash table entry provides the index of the first section | |
11227 | number in the set. Additional section numbers in the set follow, and the | |
11228 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
11229 | ||
11230 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
11231 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
11232 | be the second entry. Other members of the set may follow in any order. | |
11233 | ||
11234 | --- | |
11235 | ||
11236 | DWP Version 2: | |
11237 | ||
11238 | DWP Version 2 combines all the .debug_info, etc. sections into one, | |
11239 | and the entries in the index tables are now offsets into these sections. | |
11240 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
11241 | section. | |
11242 | ||
11243 | Index Section Contents: | |
11244 | Header | |
11245 | Hash Table of Signatures dwp_hash_table.hash_table | |
11246 | Parallel Table of Indices dwp_hash_table.unit_table | |
11247 | Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets} | |
11248 | Table of Section Sizes dwp_hash_table.v2.sizes | |
11249 | ||
11250 | The index section header consists of: | |
11251 | ||
11252 | V, 32 bit version number | |
11253 | L, 32 bit number of columns in the table of section offsets | |
11254 | N, 32 bit number of compilation units or type units in the index | |
11255 | M, 32 bit number of slots in the hash table | |
11256 | ||
11257 | Numbers are recorded using the byte order of the application binary. | |
11258 | ||
11259 | The hash table has the same format as version 1. | |
11260 | The parallel table of indices has the same format as version 1, | |
11261 | except that the entries are origin-1 indices into the table of sections | |
11262 | offsets and the table of section sizes. | |
11263 | ||
11264 | The table of offsets begins immediately following the parallel table | |
11265 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11266 | a two-dimensional array of 32-bit words (using the byte order of the | |
11267 | application binary), with L columns and N+1 rows, in row-major order. | |
11268 | Each row in the array is indexed starting from 0. The first row provides | |
11269 | a key to the remaining rows: each column in this row provides an identifier | |
11270 | for a debug section, and the offsets in the same column of subsequent rows | |
11271 | refer to that section. The section identifiers are: | |
11272 | ||
11273 | DW_SECT_INFO 1 .debug_info.dwo | |
11274 | DW_SECT_TYPES 2 .debug_types.dwo | |
11275 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11276 | DW_SECT_LINE 4 .debug_line.dwo | |
11277 | DW_SECT_LOC 5 .debug_loc.dwo | |
11278 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11279 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11280 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11281 | ||
11282 | The offsets provided by the CU and TU index sections are the base offsets | |
11283 | for the contributions made by each CU or TU to the corresponding section | |
11284 | in the package file. Each CU and TU header contains an abbrev_offset | |
11285 | field, used to find the abbreviations table for that CU or TU within the | |
11286 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11287 | be interpreted as relative to the base offset given in the index section. | |
11288 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11289 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11290 | and offsets into other debug sections obtained from DWARF attributes should | |
11291 | also be interpreted as relative to the corresponding base offset. | |
11292 | ||
11293 | The table of sizes begins immediately following the table of offsets. | |
11294 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
11295 | with L columns and N rows, in row-major order. Each row in the array is | |
11296 | indexed starting from 1 (row 0 is shared by the two tables). | |
11297 | ||
11298 | --- | |
11299 | ||
11300 | Hash table lookup is handled the same in version 1 and 2: | |
11301 | ||
11302 | We assume that N and M will not exceed 2^32 - 1. | |
11303 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
11304 | ||
d2415c6c DE |
11305 | Given a 64-bit compilation unit signature or a type signature S, an entry |
11306 | in the hash table is located as follows: | |
80626a55 | 11307 | |
d2415c6c DE |
11308 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
11309 | the low-order k bits all set to 1. | |
80626a55 | 11310 | |
d2415c6c | 11311 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 11312 | |
d2415c6c DE |
11313 | 3) If the hash table entry at index H matches the signature, use that |
11314 | entry. If the hash table entry at index H is unused (all zeroes), | |
11315 | terminate the search: the signature is not present in the table. | |
80626a55 | 11316 | |
d2415c6c | 11317 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 11318 | |
d2415c6c | 11319 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 11320 | to stop at an unused slot or find the match. */ |
80626a55 DE |
11321 | |
11322 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
11323 | .debug_{info,types}.dwo in DWP_FILE. | |
11324 | Returns NULL if there isn't one. | |
11325 | Note: This function processes DWP files only, not DWO files. */ | |
11326 | ||
11327 | static struct dwp_hash_table * | |
ed2dc618 SM |
11328 | create_dwp_hash_table (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11329 | struct dwp_file *dwp_file, int is_debug_types) | |
80626a55 DE |
11330 | { |
11331 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
400174b1 | 11332 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 11333 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 11334 | struct dwarf2_section_info *index; |
73869dc2 | 11335 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
11336 | struct dwp_hash_table *htab; |
11337 | ||
11338 | if (is_debug_types) | |
11339 | index = &dwp_file->sections.tu_index; | |
11340 | else | |
11341 | index = &dwp_file->sections.cu_index; | |
11342 | ||
96b79293 | 11343 | if (index->empty ()) |
80626a55 | 11344 | return NULL; |
96b79293 | 11345 | index->read (objfile); |
80626a55 DE |
11346 | |
11347 | index_ptr = index->buffer; | |
11348 | index_end = index_ptr + index->size; | |
11349 | ||
11350 | version = read_4_bytes (dbfd, index_ptr); | |
73869dc2 DE |
11351 | index_ptr += 4; |
11352 | if (version == 2) | |
11353 | nr_columns = read_4_bytes (dbfd, index_ptr); | |
11354 | else | |
11355 | nr_columns = 0; | |
11356 | index_ptr += 4; | |
80626a55 DE |
11357 | nr_units = read_4_bytes (dbfd, index_ptr); |
11358 | index_ptr += 4; | |
11359 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
11360 | index_ptr += 4; | |
11361 | ||
73869dc2 | 11362 | if (version != 1 && version != 2) |
80626a55 | 11363 | { |
21aa081e | 11364 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 11365 | " [in module %s]"), |
21aa081e | 11366 | pulongest (version), dwp_file->name); |
80626a55 DE |
11367 | } |
11368 | if (nr_slots != (nr_slots & -nr_slots)) | |
11369 | { | |
21aa081e | 11370 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 11371 | " is not power of 2 [in module %s]"), |
21aa081e | 11372 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
11373 | } |
11374 | ||
11375 | htab = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwp_hash_table); | |
73869dc2 DE |
11376 | htab->version = version; |
11377 | htab->nr_columns = nr_columns; | |
80626a55 DE |
11378 | htab->nr_units = nr_units; |
11379 | htab->nr_slots = nr_slots; | |
11380 | htab->hash_table = index_ptr; | |
11381 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
11382 | |
11383 | /* Exit early if the table is empty. */ | |
11384 | if (nr_slots == 0 || nr_units == 0 | |
11385 | || (version == 2 && nr_columns == 0)) | |
11386 | { | |
11387 | /* All must be zero. */ | |
11388 | if (nr_slots != 0 || nr_units != 0 | |
11389 | || (version == 2 && nr_columns != 0)) | |
11390 | { | |
b98664d3 | 11391 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
11392 | " all zero [in modules %s]"), |
11393 | dwp_file->name); | |
11394 | } | |
11395 | return htab; | |
11396 | } | |
11397 | ||
11398 | if (version == 1) | |
11399 | { | |
11400 | htab->section_pool.v1.indices = | |
11401 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11402 | /* It's harder to decide whether the section is too small in v1. | |
11403 | V1 is deprecated anyway so we punt. */ | |
11404 | } | |
11405 | else | |
11406 | { | |
11407 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11408 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 11409 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
11410 | /* Reverse map for error checking. */ |
11411 | int ids_seen[DW_SECT_MAX + 1]; | |
11412 | int i; | |
11413 | ||
11414 | if (nr_columns < 2) | |
11415 | { | |
11416 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11417 | " in section table [in module %s]"), | |
11418 | dwp_file->name); | |
11419 | } | |
11420 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11421 | { | |
11422 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11423 | " in section table [in module %s]"), | |
11424 | dwp_file->name); | |
11425 | } | |
04fd5eed GB |
11426 | memset (ids, 255, sizeof_ids); |
11427 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
11428 | for (i = 0; i < nr_columns; ++i) |
11429 | { | |
11430 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11431 | ||
11432 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11433 | { | |
11434 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11435 | " in section table [in module %s]"), | |
11436 | id, dwp_file->name); | |
11437 | } | |
11438 | if (ids_seen[id] != -1) | |
11439 | { | |
11440 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11441 | " id %d in section table [in module %s]"), | |
11442 | id, dwp_file->name); | |
11443 | } | |
11444 | ids_seen[id] = i; | |
11445 | ids[i] = id; | |
11446 | } | |
11447 | /* Must have exactly one info or types section. */ | |
11448 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11449 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11450 | != 1) | |
11451 | { | |
11452 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11453 | " DWO info/types section [in module %s]"), | |
11454 | dwp_file->name); | |
11455 | } | |
11456 | /* Must have an abbrev section. */ | |
11457 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11458 | { | |
11459 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11460 | " section [in module %s]"), | |
11461 | dwp_file->name); | |
11462 | } | |
11463 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11464 | htab->section_pool.v2.sizes = | |
11465 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11466 | * nr_units * nr_columns); | |
11467 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11468 | * nr_units * nr_columns)) | |
11469 | > index_end) | |
11470 | { | |
11471 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11472 | " [in module %s]"), | |
11473 | dwp_file->name); | |
11474 | } | |
11475 | } | |
80626a55 DE |
11476 | |
11477 | return htab; | |
11478 | } | |
11479 | ||
11480 | /* Update SECTIONS with the data from SECTP. | |
11481 | ||
11482 | This function is like the other "locate" section routines that are | |
11483 | passed to bfd_map_over_sections, but in this context the sections to | |
73869dc2 | 11484 | read comes from the DWP V1 hash table, not the full ELF section table. |
80626a55 DE |
11485 | |
11486 | The result is non-zero for success, or zero if an error was found. */ | |
11487 | ||
11488 | static int | |
73869dc2 DE |
11489 | locate_v1_virtual_dwo_sections (asection *sectp, |
11490 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11491 | { |
11492 | const struct dwop_section_names *names = &dwop_section_names; | |
11493 | ||
11494 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
11495 | { | |
11496 | /* There can be only one. */ | |
049412e3 | 11497 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11498 | return 0; |
049412e3 | 11499 | sections->abbrev.s.section = sectp; |
fd361982 | 11500 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
11501 | } |
11502 | else if (section_is_p (sectp->name, &names->info_dwo) | |
11503 | || section_is_p (sectp->name, &names->types_dwo)) | |
11504 | { | |
11505 | /* There can be only one. */ | |
049412e3 | 11506 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11507 | return 0; |
049412e3 | 11508 | sections->info_or_types.s.section = sectp; |
fd361982 | 11509 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 DE |
11510 | } |
11511 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
11512 | { | |
11513 | /* There can be only one. */ | |
049412e3 | 11514 | if (sections->line.s.section != NULL) |
80626a55 | 11515 | return 0; |
049412e3 | 11516 | sections->line.s.section = sectp; |
fd361982 | 11517 | sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
11518 | } |
11519 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
11520 | { | |
11521 | /* There can be only one. */ | |
049412e3 | 11522 | if (sections->loc.s.section != NULL) |
80626a55 | 11523 | return 0; |
049412e3 | 11524 | sections->loc.s.section = sectp; |
fd361982 | 11525 | sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
11526 | } |
11527 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
11528 | { | |
11529 | /* There can be only one. */ | |
049412e3 | 11530 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11531 | return 0; |
049412e3 | 11532 | sections->macinfo.s.section = sectp; |
fd361982 | 11533 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
11534 | } |
11535 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
11536 | { | |
11537 | /* There can be only one. */ | |
049412e3 | 11538 | if (sections->macro.s.section != NULL) |
80626a55 | 11539 | return 0; |
049412e3 | 11540 | sections->macro.s.section = sectp; |
fd361982 | 11541 | sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
11542 | } |
11543 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
11544 | { | |
11545 | /* There can be only one. */ | |
049412e3 | 11546 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11547 | return 0; |
049412e3 | 11548 | sections->str_offsets.s.section = sectp; |
fd361982 | 11549 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
11550 | } |
11551 | else | |
11552 | { | |
11553 | /* No other kind of section is valid. */ | |
11554 | return 0; | |
11555 | } | |
11556 | ||
11557 | return 1; | |
11558 | } | |
11559 | ||
73869dc2 DE |
11560 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11561 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11562 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11563 | This is for DWP version 1 files. */ | |
80626a55 DE |
11564 | |
11565 | static struct dwo_unit * | |
ed2dc618 SM |
11566 | create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11567 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11568 | uint32_t unit_index, |
11569 | const char *comp_dir, | |
11570 | ULONGEST signature, int is_debug_types) | |
80626a55 DE |
11571 | { |
11572 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
73869dc2 DE |
11573 | const struct dwp_hash_table *dwp_htab = |
11574 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11575 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
11576 | const char *kind = is_debug_types ? "TU" : "CU"; |
11577 | struct dwo_file *dwo_file; | |
11578 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11579 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11580 | void **dwo_file_slot; |
80626a55 DE |
11581 | int i; |
11582 | ||
73869dc2 DE |
11583 | gdb_assert (dwp_file->version == 1); |
11584 | ||
b4f54984 | 11585 | if (dwarf_read_debug) |
80626a55 | 11586 | { |
73869dc2 | 11587 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V1 file: %s\n", |
80626a55 | 11588 | kind, |
73869dc2 | 11589 | pulongest (unit_index), hex_string (signature), |
80626a55 DE |
11590 | dwp_file->name); |
11591 | } | |
11592 | ||
19ac8c2e | 11593 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11594 | Put a limit on the number of sections we look for so that bad data |
11595 | doesn't cause us to loop forever. */ | |
11596 | ||
73869dc2 | 11597 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11598 | (1 /* .debug_info or .debug_types */ \ |
11599 | + 1 /* .debug_abbrev */ \ | |
11600 | + 1 /* .debug_line */ \ | |
11601 | + 1 /* .debug_loc */ \ | |
11602 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11603 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11604 | + 1 /* trailing zero */) |
11605 | ||
11606 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11607 | |
73869dc2 | 11608 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11609 | { |
11610 | asection *sectp; | |
11611 | uint32_t section_nr = | |
11612 | read_4_bytes (dbfd, | |
73869dc2 DE |
11613 | dwp_htab->section_pool.v1.indices |
11614 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11615 | |
11616 | if (section_nr == 0) | |
11617 | break; | |
11618 | if (section_nr >= dwp_file->num_sections) | |
11619 | { | |
11620 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11621 | " [in module %s]"), | |
11622 | dwp_file->name); | |
11623 | } | |
11624 | ||
11625 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11626 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11627 | { |
11628 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11629 | " [in module %s]"), | |
11630 | dwp_file->name); | |
11631 | } | |
11632 | } | |
11633 | ||
11634 | if (i < 2 | |
96b79293 TT |
11635 | || sections.info_or_types.empty () |
11636 | || sections.abbrev.empty ()) | |
80626a55 DE |
11637 | { |
11638 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11639 | " [in module %s]"), | |
11640 | dwp_file->name); | |
11641 | } | |
73869dc2 | 11642 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11643 | { |
11644 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11645 | " [in module %s]"), | |
11646 | dwp_file->name); | |
11647 | } | |
11648 | ||
11649 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11650 | have dwo_unit "live" in that. At least for now. | |
11651 | ||
11652 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11653 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11654 | file, we can combine them back into a virtual DWO file to save space |
11655 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11656 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11657 | ||
791afaa2 TT |
11658 | std::string virtual_dwo_name = |
11659 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
96b79293 TT |
11660 | sections.abbrev.get_id (), |
11661 | sections.line.get_id (), | |
11662 | sections.loc.get_id (), | |
11663 | sections.str_offsets.get_id ()); | |
80626a55 | 11664 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11665 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11666 | virtual_dwo_name.c_str (), | |
11667 | comp_dir); | |
80626a55 DE |
11668 | /* Create one if necessary. */ |
11669 | if (*dwo_file_slot == NULL) | |
11670 | { | |
b4f54984 | 11671 | if (dwarf_read_debug) |
80626a55 DE |
11672 | { |
11673 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11674 | virtual_dwo_name.c_str ()); |
80626a55 | 11675 | } |
51ac9db5 | 11676 | dwo_file = new struct dwo_file; |
be1e3d3e | 11677 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
0ac5b59e | 11678 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11679 | dwo_file->sections.abbrev = sections.abbrev; |
11680 | dwo_file->sections.line = sections.line; | |
11681 | dwo_file->sections.loc = sections.loc; | |
11682 | dwo_file->sections.macinfo = sections.macinfo; | |
11683 | dwo_file->sections.macro = sections.macro; | |
11684 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11685 | /* The "str" section is global to the entire DWP file. */ | |
11686 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11687 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11688 | there's no need to record it in dwo_file. |
11689 | Also, we can't simply record type sections in dwo_file because | |
11690 | we record a pointer into the vector in dwo_unit. As we collect more | |
11691 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11692 | for it, invalidating all copies of pointers into the previous |
11693 | contents. */ | |
80626a55 DE |
11694 | *dwo_file_slot = dwo_file; |
11695 | } | |
11696 | else | |
11697 | { | |
b4f54984 | 11698 | if (dwarf_read_debug) |
80626a55 DE |
11699 | { |
11700 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11701 | virtual_dwo_name.c_str ()); |
80626a55 | 11702 | } |
9a3c8263 | 11703 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11704 | } |
80626a55 DE |
11705 | |
11706 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11707 | dwo_unit->dwo_file = dwo_file; | |
11708 | dwo_unit->signature = signature; | |
8d749320 SM |
11709 | dwo_unit->section = |
11710 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
8a0459fd | 11711 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11712 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11713 | |
11714 | return dwo_unit; | |
11715 | } | |
11716 | ||
73869dc2 DE |
11717 | /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it. |
11718 | Given a pointer to the containing section SECTION, and OFFSET,SIZE of the | |
11719 | piece within that section used by a TU/CU, return a virtual section | |
11720 | of just that piece. */ | |
11721 | ||
11722 | static struct dwarf2_section_info | |
ed2dc618 SM |
11723 | create_dwp_v2_section (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11724 | struct dwarf2_section_info *section, | |
73869dc2 DE |
11725 | bfd_size_type offset, bfd_size_type size) |
11726 | { | |
11727 | struct dwarf2_section_info result; | |
11728 | asection *sectp; | |
11729 | ||
11730 | gdb_assert (section != NULL); | |
11731 | gdb_assert (!section->is_virtual); | |
11732 | ||
11733 | memset (&result, 0, sizeof (result)); | |
11734 | result.s.containing_section = section; | |
dc4ccb6f | 11735 | result.is_virtual = true; |
73869dc2 DE |
11736 | |
11737 | if (size == 0) | |
11738 | return result; | |
11739 | ||
96b79293 | 11740 | sectp = section->get_bfd_section (); |
73869dc2 DE |
11741 | |
11742 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11743 | bounds of the real section. This is a pretty-rare event, so just | |
11744 | flag an error (easier) instead of a warning and trying to cope. */ | |
11745 | if (sectp == NULL | |
fd361982 | 11746 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 11747 | { |
73869dc2 DE |
11748 | error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit" |
11749 | " in section %s [in module %s]"), | |
fd361982 | 11750 | sectp ? bfd_section_name (sectp) : "<unknown>", |
73869dc2 DE |
11751 | objfile_name (dwarf2_per_objfile->objfile)); |
11752 | } | |
11753 | ||
11754 | result.virtual_offset = offset; | |
11755 | result.size = size; | |
11756 | return result; | |
11757 | } | |
11758 | ||
11759 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11760 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11761 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11762 | This is for DWP version 2 files. */ | |
11763 | ||
11764 | static struct dwo_unit * | |
ed2dc618 SM |
11765 | create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11766 | struct dwp_file *dwp_file, | |
73869dc2 DE |
11767 | uint32_t unit_index, |
11768 | const char *comp_dir, | |
11769 | ULONGEST signature, int is_debug_types) | |
11770 | { | |
11771 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
11772 | const struct dwp_hash_table *dwp_htab = | |
11773 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11774 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
11775 | const char *kind = is_debug_types ? "TU" : "CU"; |
11776 | struct dwo_file *dwo_file; | |
11777 | struct dwo_unit *dwo_unit; | |
11778 | struct virtual_v2_dwo_sections sections; | |
11779 | void **dwo_file_slot; | |
73869dc2 DE |
11780 | int i; |
11781 | ||
11782 | gdb_assert (dwp_file->version == 2); | |
11783 | ||
b4f54984 | 11784 | if (dwarf_read_debug) |
73869dc2 DE |
11785 | { |
11786 | fprintf_unfiltered (gdb_stdlog, "Reading %s %s/%s in DWP V2 file: %s\n", | |
11787 | kind, | |
11788 | pulongest (unit_index), hex_string (signature), | |
11789 | dwp_file->name); | |
11790 | } | |
11791 | ||
11792 | /* Fetch the section offsets of this DWO unit. */ | |
11793 | ||
11794 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11795 | |
11796 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11797 | { | |
11798 | uint32_t offset = read_4_bytes (dbfd, | |
11799 | dwp_htab->section_pool.v2.offsets | |
11800 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11801 | + i) | |
11802 | * sizeof (uint32_t))); | |
11803 | uint32_t size = read_4_bytes (dbfd, | |
11804 | dwp_htab->section_pool.v2.sizes | |
11805 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11806 | + i) | |
11807 | * sizeof (uint32_t))); | |
11808 | ||
11809 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11810 | { | |
11811 | case DW_SECT_INFO: | |
11812 | case DW_SECT_TYPES: | |
11813 | sections.info_or_types_offset = offset; | |
11814 | sections.info_or_types_size = size; | |
11815 | break; | |
11816 | case DW_SECT_ABBREV: | |
11817 | sections.abbrev_offset = offset; | |
11818 | sections.abbrev_size = size; | |
11819 | break; | |
11820 | case DW_SECT_LINE: | |
11821 | sections.line_offset = offset; | |
11822 | sections.line_size = size; | |
11823 | break; | |
11824 | case DW_SECT_LOC: | |
11825 | sections.loc_offset = offset; | |
11826 | sections.loc_size = size; | |
11827 | break; | |
11828 | case DW_SECT_STR_OFFSETS: | |
11829 | sections.str_offsets_offset = offset; | |
11830 | sections.str_offsets_size = size; | |
11831 | break; | |
11832 | case DW_SECT_MACINFO: | |
11833 | sections.macinfo_offset = offset; | |
11834 | sections.macinfo_size = size; | |
11835 | break; | |
11836 | case DW_SECT_MACRO: | |
11837 | sections.macro_offset = offset; | |
11838 | sections.macro_size = size; | |
11839 | break; | |
11840 | } | |
11841 | } | |
11842 | ||
11843 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11844 | have dwo_unit "live" in that. At least for now. | |
11845 | ||
11846 | The DWP file can be made up of a random collection of CUs and TUs. | |
11847 | However, for each CU + set of TUs that came from the same original DWO | |
11848 | file, we can combine them back into a virtual DWO file to save space | |
11849 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11850 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11851 | ||
791afaa2 TT |
11852 | std::string virtual_dwo_name = |
11853 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11854 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11855 | (long) (sections.line_size ? sections.line_offset : 0), | |
11856 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11857 | (long) (sections.str_offsets_size | |
11858 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11859 | /* Can we use an existing virtual DWO file? */ |
ed2dc618 SM |
11860 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
11861 | virtual_dwo_name.c_str (), | |
11862 | comp_dir); | |
73869dc2 DE |
11863 | /* Create one if necessary. */ |
11864 | if (*dwo_file_slot == NULL) | |
11865 | { | |
b4f54984 | 11866 | if (dwarf_read_debug) |
73869dc2 DE |
11867 | { |
11868 | fprintf_unfiltered (gdb_stdlog, "Creating virtual DWO: %s\n", | |
791afaa2 | 11869 | virtual_dwo_name.c_str ()); |
73869dc2 | 11870 | } |
51ac9db5 | 11871 | dwo_file = new struct dwo_file; |
be1e3d3e | 11872 | dwo_file->dwo_name = objfile->intern (virtual_dwo_name); |
73869dc2 DE |
11873 | dwo_file->comp_dir = comp_dir; |
11874 | dwo_file->sections.abbrev = | |
ed2dc618 | 11875 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.abbrev, |
73869dc2 DE |
11876 | sections.abbrev_offset, sections.abbrev_size); |
11877 | dwo_file->sections.line = | |
ed2dc618 | 11878 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.line, |
73869dc2 DE |
11879 | sections.line_offset, sections.line_size); |
11880 | dwo_file->sections.loc = | |
ed2dc618 | 11881 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.loc, |
73869dc2 DE |
11882 | sections.loc_offset, sections.loc_size); |
11883 | dwo_file->sections.macinfo = | |
ed2dc618 | 11884 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macinfo, |
73869dc2 DE |
11885 | sections.macinfo_offset, sections.macinfo_size); |
11886 | dwo_file->sections.macro = | |
ed2dc618 | 11887 | create_dwp_v2_section (dwarf2_per_objfile, &dwp_file->sections.macro, |
73869dc2 DE |
11888 | sections.macro_offset, sections.macro_size); |
11889 | dwo_file->sections.str_offsets = | |
ed2dc618 SM |
11890 | create_dwp_v2_section (dwarf2_per_objfile, |
11891 | &dwp_file->sections.str_offsets, | |
73869dc2 DE |
11892 | sections.str_offsets_offset, |
11893 | sections.str_offsets_size); | |
11894 | /* The "str" section is global to the entire DWP file. */ | |
11895 | dwo_file->sections.str = dwp_file->sections.str; | |
11896 | /* The info or types section is assigned below to dwo_unit, | |
11897 | there's no need to record it in dwo_file. | |
11898 | Also, we can't simply record type sections in dwo_file because | |
11899 | we record a pointer into the vector in dwo_unit. As we collect more | |
11900 | types we'll grow the vector and eventually have to reallocate space | |
11901 | for it, invalidating all copies of pointers into the previous | |
11902 | contents. */ | |
11903 | *dwo_file_slot = dwo_file; | |
11904 | } | |
11905 | else | |
11906 | { | |
b4f54984 | 11907 | if (dwarf_read_debug) |
73869dc2 DE |
11908 | { |
11909 | fprintf_unfiltered (gdb_stdlog, "Using existing virtual DWO: %s\n", | |
791afaa2 | 11910 | virtual_dwo_name.c_str ()); |
73869dc2 | 11911 | } |
9a3c8263 | 11912 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11913 | } |
73869dc2 DE |
11914 | |
11915 | dwo_unit = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct dwo_unit); | |
11916 | dwo_unit->dwo_file = dwo_file; | |
11917 | dwo_unit->signature = signature; | |
8d749320 SM |
11918 | dwo_unit->section = |
11919 | XOBNEW (&objfile->objfile_obstack, struct dwarf2_section_info); | |
ed2dc618 SM |
11920 | *dwo_unit->section = create_dwp_v2_section (dwarf2_per_objfile, |
11921 | is_debug_types | |
73869dc2 DE |
11922 | ? &dwp_file->sections.types |
11923 | : &dwp_file->sections.info, | |
11924 | sections.info_or_types_offset, | |
11925 | sections.info_or_types_size); | |
11926 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11927 | ||
11928 | return dwo_unit; | |
11929 | } | |
11930 | ||
57d63ce2 DE |
11931 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11932 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11933 | |
11934 | static struct dwo_unit * | |
ed2dc618 SM |
11935 | lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile *dwarf2_per_objfile, |
11936 | struct dwp_file *dwp_file, const char *comp_dir, | |
57d63ce2 | 11937 | ULONGEST signature, int is_debug_types) |
80626a55 | 11938 | { |
57d63ce2 DE |
11939 | const struct dwp_hash_table *dwp_htab = |
11940 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11941 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 11942 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11943 | uint32_t hash = signature & mask; |
11944 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11945 | unsigned int i; | |
11946 | void **slot; | |
870f88f7 | 11947 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11948 | |
11949 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11950 | find_dwo_cu.signature = signature; | |
19ac8c2e | 11951 | slot = htab_find_slot (is_debug_types |
48b490f2 TT |
11952 | ? dwp_file->loaded_tus.get () |
11953 | : dwp_file->loaded_cus.get (), | |
19ac8c2e | 11954 | &find_dwo_cu, INSERT); |
80626a55 DE |
11955 | |
11956 | if (*slot != NULL) | |
9a3c8263 | 11957 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11958 | |
11959 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11960 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11961 | { |
11962 | ULONGEST signature_in_table; | |
11963 | ||
11964 | signature_in_table = | |
57d63ce2 | 11965 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11966 | if (signature_in_table == signature) |
11967 | { | |
57d63ce2 DE |
11968 | uint32_t unit_index = |
11969 | read_4_bytes (dbfd, | |
11970 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11971 | |
73869dc2 DE |
11972 | if (dwp_file->version == 1) |
11973 | { | |
ed2dc618 SM |
11974 | *slot = create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile, |
11975 | dwp_file, unit_index, | |
73869dc2 DE |
11976 | comp_dir, signature, |
11977 | is_debug_types); | |
11978 | } | |
11979 | else | |
11980 | { | |
ed2dc618 SM |
11981 | *slot = create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile, |
11982 | dwp_file, unit_index, | |
73869dc2 DE |
11983 | comp_dir, signature, |
11984 | is_debug_types); | |
11985 | } | |
9a3c8263 | 11986 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11987 | } |
11988 | if (signature_in_table == 0) | |
11989 | return NULL; | |
11990 | hash = (hash + hash2) & mask; | |
11991 | } | |
11992 | ||
11993 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11994 | " [in module %s]"), | |
11995 | dwp_file->name); | |
11996 | } | |
11997 | ||
ab5088bf | 11998 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11999 | Open the file specified by FILE_NAME and hand it off to BFD for |
12000 | preliminary analysis. Return a newly initialized bfd *, which | |
12001 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12002 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12003 | SEARCH_CWD is true if the current directory is to be searched. |
12004 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12005 | If successful, the file is added to the bfd include table of the |
12006 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12007 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12008 | NOTE: This function is derived from symfile_bfd_open. */ |
12009 | ||
192b62ce | 12010 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12011 | try_open_dwop_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12012 | const char *file_name, int is_dwp, int search_cwd) | |
3019eac3 | 12013 | { |
24b9144d | 12014 | int desc; |
9c02c129 DE |
12015 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12016 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12017 | to debug_file_directory. */ | |
e0cc99a6 | 12018 | const char *search_path; |
9c02c129 DE |
12019 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12020 | ||
e0cc99a6 | 12021 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12022 | if (search_cwd) |
12023 | { | |
12024 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12025 | { |
12026 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12027 | debug_file_directory, | |
12028 | (char *) NULL)); | |
12029 | search_path = search_path_holder.get (); | |
12030 | } | |
6ac97d4c | 12031 | else |
e0cc99a6 | 12032 | search_path = "."; |
6ac97d4c | 12033 | } |
9c02c129 | 12034 | else |
e0cc99a6 | 12035 | search_path = debug_file_directory; |
3019eac3 | 12036 | |
24b9144d | 12037 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12038 | if (is_dwp) |
12039 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12040 | |
12041 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12042 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12043 | O_RDONLY | O_BINARY, &absolute_name); |
12044 | if (desc < 0) | |
12045 | return NULL; | |
12046 | ||
e0cc99a6 TT |
12047 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12048 | gnutarget, desc)); | |
9c02c129 DE |
12049 | if (sym_bfd == NULL) |
12050 | return NULL; | |
192b62ce | 12051 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12052 | |
192b62ce TT |
12053 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12054 | return NULL; | |
3019eac3 | 12055 | |
13aaf454 DE |
12056 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12057 | This is important because things like demangled_names_hash lives in the | |
12058 | objfile's per_bfd space and may have references to things like symbol | |
12059 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
192b62ce | 12060 | gdb_bfd_record_inclusion (dwarf2_per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12061 | |
3019eac3 DE |
12062 | return sym_bfd; |
12063 | } | |
12064 | ||
ab5088bf | 12065 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12066 | COMP_DIR is the DW_AT_comp_dir attribute. |
12067 | The result is the bfd handle of the file. | |
12068 | If there is a problem finding or opening the file, return NULL. | |
12069 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12070 | same as symfile_bfd_open. */ | |
12071 | ||
192b62ce | 12072 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12073 | open_dwo_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12074 | const char *file_name, const char *comp_dir) | |
3019eac3 | 12075 | { |
80626a55 | 12076 | if (IS_ABSOLUTE_PATH (file_name)) |
ed2dc618 SM |
12077 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12078 | 0 /*is_dwp*/, 0 /*search_cwd*/); | |
3019eac3 DE |
12079 | |
12080 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12081 | ||
12082 | if (comp_dir != NULL) | |
12083 | { | |
43816ebc TT |
12084 | gdb::unique_xmalloc_ptr<char> path_to_try |
12085 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12086 | |
12087 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12088 | search path, which seems useful. */ | |
ed2dc618 | 12089 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, |
43816ebc | 12090 | path_to_try.get (), |
ed2dc618 | 12091 | 0 /*is_dwp*/, |
192b62ce | 12092 | 1 /*search_cwd*/)); |
3019eac3 DE |
12093 | if (abfd != NULL) |
12094 | return abfd; | |
12095 | } | |
12096 | ||
12097 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12098 | is a list of paths. */ | |
12099 | ||
12100 | if (*debug_file_directory == '\0') | |
12101 | return NULL; | |
12102 | ||
ed2dc618 SM |
12103 | return try_open_dwop_file (dwarf2_per_objfile, file_name, |
12104 | 0 /*is_dwp*/, 1 /*search_cwd*/); | |
3019eac3 DE |
12105 | } |
12106 | ||
80626a55 DE |
12107 | /* This function is mapped across the sections and remembers the offset and |
12108 | size of each of the DWO debugging sections we are interested in. */ | |
12109 | ||
12110 | static void | |
12111 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, void *dwo_sections_ptr) | |
12112 | { | |
9a3c8263 | 12113 | struct dwo_sections *dwo_sections = (struct dwo_sections *) dwo_sections_ptr; |
80626a55 DE |
12114 | const struct dwop_section_names *names = &dwop_section_names; |
12115 | ||
12116 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12117 | { | |
049412e3 | 12118 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12119 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 DE |
12120 | } |
12121 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12122 | { | |
049412e3 | 12123 | dwo_sections->info.s.section = sectp; |
fd361982 | 12124 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 DE |
12125 | } |
12126 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12127 | { | |
049412e3 | 12128 | dwo_sections->line.s.section = sectp; |
fd361982 | 12129 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 DE |
12130 | } |
12131 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12132 | { | |
049412e3 | 12133 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12134 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 DE |
12135 | } |
12136 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12137 | { | |
049412e3 | 12138 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12139 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 DE |
12140 | } |
12141 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12142 | { | |
049412e3 | 12143 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12144 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 DE |
12145 | } |
12146 | else if (section_is_p (sectp->name, &names->str_dwo)) | |
12147 | { | |
049412e3 | 12148 | dwo_sections->str.s.section = sectp; |
fd361982 | 12149 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 DE |
12150 | } |
12151 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12152 | { | |
049412e3 | 12153 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12154 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
12155 | } |
12156 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12157 | { | |
12158 | struct dwarf2_section_info type_section; | |
12159 | ||
12160 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12161 | type_section.s.section = sectp; |
fd361982 | 12162 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 12163 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12164 | } |
12165 | } | |
12166 | ||
ab5088bf | 12167 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12168 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12169 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12170 | |
12171 | static struct dwo_file * | |
0ac5b59e DE |
12172 | open_and_init_dwo_file (struct dwarf2_per_cu_data *per_cu, |
12173 | const char *dwo_name, const char *comp_dir) | |
3019eac3 | 12174 | { |
ed2dc618 | 12175 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 12176 | |
fb1eb2f9 | 12177 | gdb_bfd_ref_ptr dbfd = open_dwo_file (dwarf2_per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12178 | if (dbfd == NULL) |
12179 | { | |
b4f54984 | 12180 | if (dwarf_read_debug) |
80626a55 DE |
12181 | fprintf_unfiltered (gdb_stdlog, "DWO file not found: %s\n", dwo_name); |
12182 | return NULL; | |
12183 | } | |
263db9a1 | 12184 | |
51ac9db5 | 12185 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12186 | dwo_file->dwo_name = dwo_name; |
12187 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12188 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12189 | |
fb1eb2f9 | 12190 | bfd_map_over_sections (dwo_file->dbfd.get (), dwarf2_locate_dwo_sections, |
192b62ce | 12191 | &dwo_file->sections); |
3019eac3 | 12192 | |
18a8505e AT |
12193 | create_cus_hash_table (dwarf2_per_objfile, per_cu->cu, *dwo_file, |
12194 | dwo_file->sections.info, dwo_file->cus); | |
3019eac3 | 12195 | |
263db9a1 | 12196 | create_debug_types_hash_table (dwarf2_per_objfile, dwo_file.get (), |
ed2dc618 | 12197 | dwo_file->sections.types, dwo_file->tus); |
3019eac3 | 12198 | |
b4f54984 | 12199 | if (dwarf_read_debug) |
80626a55 DE |
12200 | fprintf_unfiltered (gdb_stdlog, "DWO file found: %s\n", dwo_name); |
12201 | ||
263db9a1 | 12202 | return dwo_file.release (); |
3019eac3 DE |
12203 | } |
12204 | ||
80626a55 | 12205 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12206 | size of each of the DWP debugging sections common to version 1 and 2 that |
12207 | we are interested in. */ | |
3019eac3 | 12208 | |
80626a55 | 12209 | static void |
73869dc2 DE |
12210 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
12211 | void *dwp_file_ptr) | |
3019eac3 | 12212 | { |
9a3c8263 | 12213 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
80626a55 DE |
12214 | const struct dwop_section_names *names = &dwop_section_names; |
12215 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12216 | |
80626a55 | 12217 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12218 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12219 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12220 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12221 | |
80626a55 DE |
12222 | /* Look for specific sections that we need. */ |
12223 | if (section_is_p (sectp->name, &names->str_dwo)) | |
12224 | { | |
049412e3 | 12225 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 12226 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 DE |
12227 | } |
12228 | else if (section_is_p (sectp->name, &names->cu_index)) | |
12229 | { | |
049412e3 | 12230 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 12231 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12232 | } |
12233 | else if (section_is_p (sectp->name, &names->tu_index)) | |
12234 | { | |
049412e3 | 12235 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 12236 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12237 | } |
12238 | } | |
3019eac3 | 12239 | |
73869dc2 DE |
12240 | /* This function is mapped across the sections and remembers the offset and |
12241 | size of each of the DWP version 2 debugging sections that we are interested | |
12242 | in. This is split into a separate function because we don't know if we | |
12243 | have version 1 or 2 until we parse the cu_index/tu_index sections. */ | |
12244 | ||
12245 | static void | |
12246 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12247 | { | |
9a3c8263 | 12248 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12249 | const struct dwop_section_names *names = &dwop_section_names; |
12250 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12251 | ||
12252 | /* Record the ELF section number for later lookup: this is what the | |
12253 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12254 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12255 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12256 | ||
12257 | /* Look for specific sections that we need. */ | |
12258 | if (section_is_p (sectp->name, &names->abbrev_dwo)) | |
12259 | { | |
049412e3 | 12260 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 12261 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 DE |
12262 | } |
12263 | else if (section_is_p (sectp->name, &names->info_dwo)) | |
12264 | { | |
049412e3 | 12265 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 12266 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 DE |
12267 | } |
12268 | else if (section_is_p (sectp->name, &names->line_dwo)) | |
12269 | { | |
049412e3 | 12270 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 12271 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 DE |
12272 | } |
12273 | else if (section_is_p (sectp->name, &names->loc_dwo)) | |
12274 | { | |
049412e3 | 12275 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 12276 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 DE |
12277 | } |
12278 | else if (section_is_p (sectp->name, &names->macinfo_dwo)) | |
12279 | { | |
049412e3 | 12280 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 12281 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 DE |
12282 | } |
12283 | else if (section_is_p (sectp->name, &names->macro_dwo)) | |
12284 | { | |
049412e3 | 12285 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 12286 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 DE |
12287 | } |
12288 | else if (section_is_p (sectp->name, &names->str_offsets_dwo)) | |
12289 | { | |
049412e3 | 12290 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 12291 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 DE |
12292 | } |
12293 | else if (section_is_p (sectp->name, &names->types_dwo)) | |
12294 | { | |
049412e3 | 12295 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 12296 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
12297 | } |
12298 | } | |
12299 | ||
80626a55 | 12300 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12301 | |
80626a55 DE |
12302 | static hashval_t |
12303 | hash_dwp_loaded_cutus (const void *item) | |
12304 | { | |
9a3c8263 | 12305 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 12306 | |
80626a55 DE |
12307 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
12308 | return dwo_unit->signature; | |
3019eac3 DE |
12309 | } |
12310 | ||
80626a55 | 12311 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12312 | |
80626a55 DE |
12313 | static int |
12314 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 12315 | { |
9a3c8263 SM |
12316 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
12317 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 12318 | |
80626a55 DE |
12319 | return dua->signature == dub->signature; |
12320 | } | |
3019eac3 | 12321 | |
80626a55 | 12322 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12323 | |
48b490f2 | 12324 | static htab_up |
298e9637 | 12325 | allocate_dwp_loaded_cutus_table () |
80626a55 | 12326 | { |
48b490f2 TT |
12327 | return htab_up (htab_create_alloc (3, |
12328 | hash_dwp_loaded_cutus, | |
12329 | eq_dwp_loaded_cutus, | |
12330 | NULL, xcalloc, xfree)); | |
80626a55 | 12331 | } |
3019eac3 | 12332 | |
ab5088bf DE |
12333 | /* Try to open DWP file FILE_NAME. |
12334 | The result is the bfd handle of the file. | |
12335 | If there is a problem finding or opening the file, return NULL. | |
12336 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12337 | same as symfile_bfd_open. */ | |
12338 | ||
192b62ce | 12339 | static gdb_bfd_ref_ptr |
ed2dc618 SM |
12340 | open_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile, |
12341 | const char *file_name) | |
ab5088bf | 12342 | { |
ed2dc618 SM |
12343 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (dwarf2_per_objfile, file_name, |
12344 | 1 /*is_dwp*/, | |
192b62ce | 12345 | 1 /*search_cwd*/)); |
6ac97d4c DE |
12346 | if (abfd != NULL) |
12347 | return abfd; | |
12348 | ||
12349 | /* Work around upstream bug 15652. | |
12350 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
12351 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
12352 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
12353 | of the executable's path may have discarded the needed info. | |
12354 | [IWBN if the dwp file name was recorded in the executable, akin to | |
12355 | .gnu_debuglink, but that doesn't exist yet.] | |
12356 | Strip the directory from FILE_NAME and search again. */ | |
12357 | if (*debug_file_directory != '\0') | |
12358 | { | |
12359 | /* Don't implicitly search the current directory here. | |
12360 | If the user wants to search "." to handle this case, | |
12361 | it must be added to debug-file-directory. */ | |
ed2dc618 SM |
12362 | return try_open_dwop_file (dwarf2_per_objfile, |
12363 | lbasename (file_name), 1 /*is_dwp*/, | |
6ac97d4c DE |
12364 | 0 /*search_cwd*/); |
12365 | } | |
12366 | ||
12367 | return NULL; | |
ab5088bf DE |
12368 | } |
12369 | ||
80626a55 DE |
12370 | /* Initialize the use of the DWP file for the current objfile. |
12371 | By convention the name of the DWP file is ${objfile}.dwp. | |
12372 | The result is NULL if it can't be found. */ | |
a766d390 | 12373 | |
400174b1 | 12374 | static std::unique_ptr<struct dwp_file> |
ed2dc618 | 12375 | open_and_init_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
80626a55 DE |
12376 | { |
12377 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
80626a55 | 12378 | |
82bf32bc JK |
12379 | /* Try to find first .dwp for the binary file before any symbolic links |
12380 | resolving. */ | |
6c447423 DE |
12381 | |
12382 | /* If the objfile is a debug file, find the name of the real binary | |
12383 | file and get the name of dwp file from there. */ | |
d721ba37 | 12384 | std::string dwp_name; |
6c447423 DE |
12385 | if (objfile->separate_debug_objfile_backlink != NULL) |
12386 | { | |
12387 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
12388 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 12389 | |
d721ba37 | 12390 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
12391 | } |
12392 | else | |
d721ba37 PA |
12393 | dwp_name = objfile->original_name; |
12394 | ||
12395 | dwp_name += ".dwp"; | |
80626a55 | 12396 | |
ed2dc618 | 12397 | gdb_bfd_ref_ptr dbfd (open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
12398 | if (dbfd == NULL |
12399 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12400 | { | |
12401 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12402 | dwp_name = objfile_name (objfile); |
12403 | dwp_name += ".dwp"; | |
ed2dc618 | 12404 | dbfd = open_dwp_file (dwarf2_per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
12405 | } |
12406 | ||
80626a55 DE |
12407 | if (dbfd == NULL) |
12408 | { | |
b4f54984 | 12409 | if (dwarf_read_debug) |
d721ba37 | 12410 | fprintf_unfiltered (gdb_stdlog, "DWP file not found: %s\n", dwp_name.c_str ()); |
400174b1 | 12411 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 12412 | } |
400174b1 TT |
12413 | |
12414 | const char *name = bfd_get_filename (dbfd.get ()); | |
12415 | std::unique_ptr<struct dwp_file> dwp_file | |
12416 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 12417 | |
0a0f4c01 | 12418 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 DE |
12419 | dwp_file->elf_sections = |
12420 | OBSTACK_CALLOC (&objfile->objfile_obstack, | |
12421 | dwp_file->num_sections, asection *); | |
12422 | ||
400174b1 TT |
12423 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12424 | dwarf2_locate_common_dwp_sections, | |
12425 | dwp_file.get ()); | |
80626a55 | 12426 | |
400174b1 TT |
12427 | dwp_file->cus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12428 | 0); | |
80626a55 | 12429 | |
400174b1 TT |
12430 | dwp_file->tus = create_dwp_hash_table (dwarf2_per_objfile, dwp_file.get (), |
12431 | 1); | |
80626a55 | 12432 | |
73869dc2 | 12433 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12434 | if (dwp_file->cus && dwp_file->tus |
12435 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12436 | { |
12437 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12438 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12439 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12440 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12441 | " TU version %s [in DWP file %s]"), | |
12442 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12443 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12444 | } |
08302ed2 DE |
12445 | |
12446 | if (dwp_file->cus) | |
12447 | dwp_file->version = dwp_file->cus->version; | |
12448 | else if (dwp_file->tus) | |
12449 | dwp_file->version = dwp_file->tus->version; | |
12450 | else | |
12451 | dwp_file->version = 2; | |
73869dc2 DE |
12452 | |
12453 | if (dwp_file->version == 2) | |
400174b1 TT |
12454 | bfd_map_over_sections (dwp_file->dbfd.get (), |
12455 | dwarf2_locate_v2_dwp_sections, | |
12456 | dwp_file.get ()); | |
73869dc2 | 12457 | |
298e9637 SM |
12458 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
12459 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); | |
80626a55 | 12460 | |
b4f54984 | 12461 | if (dwarf_read_debug) |
80626a55 DE |
12462 | { |
12463 | fprintf_unfiltered (gdb_stdlog, "DWP file found: %s\n", dwp_file->name); | |
12464 | fprintf_unfiltered (gdb_stdlog, | |
21aa081e PA |
12465 | " %s CUs, %s TUs\n", |
12466 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12467 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12468 | } |
12469 | ||
12470 | return dwp_file; | |
3019eac3 | 12471 | } |
c906108c | 12472 | |
ab5088bf DE |
12473 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12474 | ||
12475 | static struct dwp_file * | |
ed2dc618 | 12476 | get_dwp_file (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ab5088bf DE |
12477 | { |
12478 | if (! dwarf2_per_objfile->dwp_checked) | |
12479 | { | |
ed2dc618 SM |
12480 | dwarf2_per_objfile->dwp_file |
12481 | = open_and_init_dwp_file (dwarf2_per_objfile); | |
ab5088bf DE |
12482 | dwarf2_per_objfile->dwp_checked = 1; |
12483 | } | |
400174b1 | 12484 | return dwarf2_per_objfile->dwp_file.get (); |
ab5088bf DE |
12485 | } |
12486 | ||
80626a55 DE |
12487 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12488 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12489 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12490 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12491 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12492 | ||
12493 | This is called, for example, when wanting to read a variable with a | |
12494 | complex location. Therefore we don't want to do file i/o for every call. | |
12495 | Therefore we don't want to look for a DWO file on every call. | |
12496 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12497 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12498 | for a DWO file. | |
12499 | ||
1c658ad5 | 12500 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12501 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12502 | |
3019eac3 | 12503 | static struct dwo_unit * |
80626a55 DE |
12504 | lookup_dwo_cutu (struct dwarf2_per_cu_data *this_unit, |
12505 | const char *dwo_name, const char *comp_dir, | |
12506 | ULONGEST signature, int is_debug_types) | |
3019eac3 | 12507 | { |
ed2dc618 | 12508 | struct dwarf2_per_objfile *dwarf2_per_objfile = this_unit->dwarf2_per_objfile; |
3019eac3 | 12509 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
80626a55 DE |
12510 | const char *kind = is_debug_types ? "TU" : "CU"; |
12511 | void **dwo_file_slot; | |
3019eac3 | 12512 | struct dwo_file *dwo_file; |
80626a55 | 12513 | struct dwp_file *dwp_file; |
cb1df416 | 12514 | |
6a506a2d DE |
12515 | /* First see if there's a DWP file. |
12516 | If we have a DWP file but didn't find the DWO inside it, don't | |
12517 | look for the original DWO file. It makes gdb behave differently | |
12518 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12519 | |
ed2dc618 | 12520 | dwp_file = get_dwp_file (dwarf2_per_objfile); |
80626a55 | 12521 | if (dwp_file != NULL) |
cf2c3c16 | 12522 | { |
80626a55 DE |
12523 | const struct dwp_hash_table *dwp_htab = |
12524 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12525 | ||
12526 | if (dwp_htab != NULL) | |
12527 | { | |
12528 | struct dwo_unit *dwo_cutu = | |
ed2dc618 | 12529 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile, dwp_file, comp_dir, |
57d63ce2 | 12530 | signature, is_debug_types); |
80626a55 DE |
12531 | |
12532 | if (dwo_cutu != NULL) | |
12533 | { | |
b4f54984 | 12534 | if (dwarf_read_debug) |
80626a55 DE |
12535 | { |
12536 | fprintf_unfiltered (gdb_stdlog, | |
12537 | "Virtual DWO %s %s found: @%s\n", | |
12538 | kind, hex_string (signature), | |
12539 | host_address_to_string (dwo_cutu)); | |
12540 | } | |
12541 | return dwo_cutu; | |
12542 | } | |
12543 | } | |
12544 | } | |
6a506a2d | 12545 | else |
80626a55 | 12546 | { |
6a506a2d | 12547 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12548 | |
ed2dc618 SM |
12549 | dwo_file_slot = lookup_dwo_file_slot (dwarf2_per_objfile, |
12550 | dwo_name, comp_dir); | |
6a506a2d | 12551 | if (*dwo_file_slot == NULL) |
80626a55 | 12552 | { |
6a506a2d DE |
12553 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
12554 | *dwo_file_slot = open_and_init_dwo_file (this_unit, dwo_name, comp_dir); | |
19c3d4c9 | 12555 | } |
6a506a2d | 12556 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12557 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12558 | |
6a506a2d | 12559 | if (dwo_file != NULL) |
19c3d4c9 | 12560 | { |
6a506a2d DE |
12561 | struct dwo_unit *dwo_cutu = NULL; |
12562 | ||
12563 | if (is_debug_types && dwo_file->tus) | |
12564 | { | |
12565 | struct dwo_unit find_dwo_cutu; | |
12566 | ||
12567 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12568 | find_dwo_cutu.signature = signature; | |
9a3c8263 | 12569 | dwo_cutu |
b0b6a987 TT |
12570 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
12571 | &find_dwo_cutu); | |
6a506a2d | 12572 | } |
33c5cd75 | 12573 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12574 | { |
33c5cd75 DB |
12575 | struct dwo_unit find_dwo_cutu; |
12576 | ||
12577 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12578 | find_dwo_cutu.signature = signature; | |
b0b6a987 | 12579 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
33c5cd75 | 12580 | &find_dwo_cutu); |
6a506a2d DE |
12581 | } |
12582 | ||
12583 | if (dwo_cutu != NULL) | |
12584 | { | |
b4f54984 | 12585 | if (dwarf_read_debug) |
6a506a2d DE |
12586 | { |
12587 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) found: @%s\n", | |
12588 | kind, dwo_name, hex_string (signature), | |
12589 | host_address_to_string (dwo_cutu)); | |
12590 | } | |
12591 | return dwo_cutu; | |
80626a55 DE |
12592 | } |
12593 | } | |
2e276125 | 12594 | } |
9cdd5dbd | 12595 | |
80626a55 DE |
12596 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12597 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12598 | correctly to find the file. */ | |
12599 | ||
b4f54984 | 12600 | if (dwarf_read_debug) |
80626a55 DE |
12601 | { |
12602 | fprintf_unfiltered (gdb_stdlog, "DWO %s %s(%s) not found\n", | |
12603 | kind, dwo_name, hex_string (signature)); | |
12604 | } | |
3019eac3 | 12605 | |
6656a72d DE |
12606 | /* This is a warning and not a complaint because it can be caused by |
12607 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12608 | { |
12609 | /* Print the name of the DWP file if we looked there, helps the user | |
12610 | better diagnose the problem. */ | |
791afaa2 | 12611 | std::string dwp_text; |
43942612 DE |
12612 | |
12613 | if (dwp_file != NULL) | |
791afaa2 TT |
12614 | dwp_text = string_printf (" [in DWP file %s]", |
12615 | lbasename (dwp_file->name)); | |
43942612 | 12616 | |
9d8780f0 | 12617 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 DE |
12618 | " [in module %s]"), |
12619 | kind, dwo_name, hex_string (signature), | |
791afaa2 | 12620 | dwp_text.c_str (), |
43942612 | 12621 | this_unit->is_debug_types ? "TU" : "CU", |
9d8780f0 | 12622 | sect_offset_str (this_unit->sect_off), objfile_name (objfile)); |
43942612 | 12623 | } |
3019eac3 | 12624 | return NULL; |
5fb290d7 DJ |
12625 | } |
12626 | ||
80626a55 DE |
12627 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12628 | See lookup_dwo_cutu_unit for details. */ | |
12629 | ||
12630 | static struct dwo_unit * | |
12631 | lookup_dwo_comp_unit (struct dwarf2_per_cu_data *this_cu, | |
12632 | const char *dwo_name, const char *comp_dir, | |
12633 | ULONGEST signature) | |
12634 | { | |
12635 | return lookup_dwo_cutu (this_cu, dwo_name, comp_dir, signature, 0); | |
12636 | } | |
12637 | ||
12638 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12639 | See lookup_dwo_cutu_unit for details. */ | |
12640 | ||
12641 | static struct dwo_unit * | |
12642 | lookup_dwo_type_unit (struct signatured_type *this_tu, | |
12643 | const char *dwo_name, const char *comp_dir) | |
12644 | { | |
12645 | return lookup_dwo_cutu (&this_tu->per_cu, dwo_name, comp_dir, this_tu->signature, 1); | |
12646 | } | |
12647 | ||
89e63ee4 DE |
12648 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12649 | ||
12650 | static int | |
12651 | queue_and_load_dwo_tu (void **slot, void *info) | |
12652 | { | |
12653 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
12654 | struct dwarf2_per_cu_data *per_cu = (struct dwarf2_per_cu_data *) info; | |
12655 | ULONGEST signature = dwo_unit->signature; | |
12656 | struct signatured_type *sig_type = | |
12657 | lookup_dwo_signatured_type (per_cu->cu, signature); | |
12658 | ||
12659 | if (sig_type != NULL) | |
12660 | { | |
12661 | struct dwarf2_per_cu_data *sig_cu = &sig_type->per_cu; | |
12662 | ||
12663 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's | |
12664 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12665 | while processing PER_CU. */ | |
12666 | if (maybe_queue_comp_unit (NULL, sig_cu, per_cu->cu->language)) | |
12667 | load_full_type_unit (sig_cu); | |
ae640021 | 12668 | per_cu->imported_symtabs_push (sig_cu); |
89e63ee4 DE |
12669 | } |
12670 | ||
12671 | return 1; | |
12672 | } | |
12673 | ||
12674 | /* Queue all TUs contained in the DWO of PER_CU to be read in. | |
12675 | The DWO may have the only definition of the type, though it may not be | |
12676 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12677 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12678 | ||
12679 | static void | |
12680 | queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data *per_cu) | |
12681 | { | |
12682 | struct dwo_unit *dwo_unit; | |
12683 | struct dwo_file *dwo_file; | |
12684 | ||
12685 | gdb_assert (!per_cu->is_debug_types); | |
ed2dc618 | 12686 | gdb_assert (get_dwp_file (per_cu->dwarf2_per_objfile) == NULL); |
89e63ee4 DE |
12687 | gdb_assert (per_cu->cu != NULL); |
12688 | ||
12689 | dwo_unit = per_cu->cu->dwo_unit; | |
12690 | gdb_assert (dwo_unit != NULL); | |
12691 | ||
12692 | dwo_file = dwo_unit->dwo_file; | |
12693 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
12694 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, |
12695 | per_cu); | |
89e63ee4 DE |
12696 | } |
12697 | ||
3019eac3 | 12698 | /* Read in various DIEs. */ |
348e048f | 12699 | |
d389af10 | 12700 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12701 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12702 | already referenced by DW_AT_abstract_origin from the children of the | |
12703 | current DIE. */ | |
d389af10 JK |
12704 | |
12705 | static void | |
12706 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12707 | { | |
12708 | struct die_info *child_die; | |
791afaa2 | 12709 | sect_offset *offsetp; |
d389af10 JK |
12710 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12711 | struct die_info *origin_die; | |
12712 | /* Iterator of the ORIGIN_DIE children. */ | |
12713 | struct die_info *origin_child_die; | |
d389af10 | 12714 | struct attribute *attr; |
cd02d79d PA |
12715 | struct dwarf2_cu *origin_cu; |
12716 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12717 | |
12718 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12719 | if (!attr) | |
12720 | return; | |
12721 | ||
cd02d79d PA |
12722 | /* Note that following die references may follow to a die in a |
12723 | different cu. */ | |
12724 | ||
12725 | origin_cu = cu; | |
12726 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12727 | ||
12728 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12729 | symbols in. */ | |
12730 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12731 | origin_cu->list_in_scope = cu->list_in_scope; | |
12732 | ||
edb3359d DJ |
12733 | if (die->tag != origin_die->tag |
12734 | && !(die->tag == DW_TAG_inlined_subroutine | |
12735 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12736 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
12737 | sect_offset_str (die->sect_off), |
12738 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 12739 | |
791afaa2 | 12740 | std::vector<sect_offset> offsets; |
d389af10 | 12741 | |
3ea89b92 PMR |
12742 | for (child_die = die->child; |
12743 | child_die && child_die->tag; | |
12744 | child_die = sibling_die (child_die)) | |
12745 | { | |
12746 | struct die_info *child_origin_die; | |
12747 | struct dwarf2_cu *child_origin_cu; | |
12748 | ||
12749 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12750 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12751 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12752 | present in the abstract instance but not referenced in the concrete | |
12753 | one. */ | |
216f72a1 JK |
12754 | if (child_die->tag == DW_TAG_call_site |
12755 | || child_die->tag == DW_TAG_GNU_call_site) | |
3ea89b92 PMR |
12756 | continue; |
12757 | ||
c38f313d DJ |
12758 | /* For each CHILD_DIE, find the corresponding child of |
12759 | ORIGIN_DIE. If there is more than one layer of | |
12760 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12761 | but GCC versions at least through 4.4 generate this (GCC PR | |
12762 | 40573). */ | |
3ea89b92 PMR |
12763 | child_origin_die = child_die; |
12764 | child_origin_cu = cu; | |
c38f313d DJ |
12765 | while (1) |
12766 | { | |
cd02d79d PA |
12767 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12768 | child_origin_cu); | |
c38f313d DJ |
12769 | if (attr == NULL) |
12770 | break; | |
cd02d79d PA |
12771 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12772 | &child_origin_cu); | |
c38f313d DJ |
12773 | } |
12774 | ||
d389af10 JK |
12775 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12776 | counterpart may exist. */ | |
c38f313d | 12777 | if (child_origin_die != child_die) |
d389af10 | 12778 | { |
edb3359d DJ |
12779 | if (child_die->tag != child_origin_die->tag |
12780 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12781 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12782 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12783 | "different tags"), |
9d8780f0 SM |
12784 | sect_offset_str (child_die->sect_off), |
12785 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12786 | if (child_origin_die->parent != origin_die) |
b98664d3 | 12787 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12788 | "different parents"), |
9d8780f0 SM |
12789 | sect_offset_str (child_die->sect_off), |
12790 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12791 | else |
791afaa2 | 12792 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12793 | } |
d389af10 | 12794 | } |
791afaa2 TT |
12795 | std::sort (offsets.begin (), offsets.end ()); |
12796 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12797 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12798 | if (offsetp[-1] == *offsetp) |
b98664d3 | 12799 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
12800 | "to DIE %s as their abstract origin"), |
12801 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 12802 | |
791afaa2 | 12803 | offsetp = offsets.data (); |
d389af10 JK |
12804 | origin_child_die = origin_die->child; |
12805 | while (origin_child_die && origin_child_die->tag) | |
12806 | { | |
12807 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12808 | while (offsetp < offsets_end |
9c541725 | 12809 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12810 | offsetp++; |
b64f50a1 | 12811 | if (offsetp >= offsets_end |
9c541725 | 12812 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12813 | { |
adde2bff DE |
12814 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12815 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12816 | This can happen with mutually referenced abstract_origins. | |
12817 | PR 16581. */ | |
12818 | if (!origin_child_die->in_process) | |
12819 | process_die (origin_child_die, origin_cu); | |
d389af10 JK |
12820 | } |
12821 | origin_child_die = sibling_die (origin_child_die); | |
12822 | } | |
cd02d79d | 12823 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
12824 | |
12825 | if (cu != origin_cu) | |
12826 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
12827 | } |
12828 | ||
c906108c | 12829 | static void |
e7c27a73 | 12830 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12831 | { |
518817b3 | 12832 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 12833 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
fe978cb0 | 12834 | struct context_stack *newobj; |
c906108c SS |
12835 | CORE_ADDR lowpc; |
12836 | CORE_ADDR highpc; | |
12837 | struct die_info *child_die; | |
edb3359d | 12838 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12839 | const char *name; |
e142c38c | 12840 | CORE_ADDR baseaddr; |
801e3a5b | 12841 | struct block *block; |
edb3359d | 12842 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12843 | std::vector<struct symbol *> template_args; |
34eaf542 | 12844 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12845 | |
12846 | if (inlined_func) | |
12847 | { | |
12848 | /* If we do not have call site information, we can't show the | |
12849 | caller of this inlined function. That's too confusing, so | |
12850 | only use the scope for local variables. */ | |
12851 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12852 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12853 | if (call_line == NULL || call_file == NULL) | |
12854 | { | |
12855 | read_lexical_block_scope (die, cu); | |
12856 | return; | |
12857 | } | |
12858 | } | |
c906108c | 12859 | |
b3b3bada | 12860 | baseaddr = objfile->text_section_offset (); |
e142c38c | 12861 | |
94af9270 | 12862 | name = dwarf2_name (die, cu); |
c906108c | 12863 | |
e8d05480 JB |
12864 | /* Ignore functions with missing or empty names. These are actually |
12865 | illegal according to the DWARF standard. */ | |
12866 | if (name == NULL) | |
12867 | { | |
b98664d3 | 12868 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 12869 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
12870 | return; |
12871 | } | |
12872 | ||
12873 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12874 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12875 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12876 | { |
ae4d0c03 PM |
12877 | attr = dwarf2_attr (die, DW_AT_external, cu); |
12878 | if (!attr || !DW_UNSND (attr)) | |
b98664d3 | 12879 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
12880 | "for subprogram DIE at %s"), |
12881 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
12882 | return; |
12883 | } | |
c906108c | 12884 | |
3e29f34a MR |
12885 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12886 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12887 | |
34eaf542 TT |
12888 | /* If we have any template arguments, then we must allocate a |
12889 | different sort of symbol. */ | |
12890 | for (child_die = die->child; child_die; child_die = sibling_die (child_die)) | |
12891 | { | |
12892 | if (child_die->tag == DW_TAG_template_type_param | |
12893 | || child_die->tag == DW_TAG_template_value_param) | |
12894 | { | |
e623cf5d | 12895 | templ_func = allocate_template_symbol (objfile); |
cf724bc9 | 12896 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
12897 | break; |
12898 | } | |
12899 | } | |
12900 | ||
c24bdb02 | 12901 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
12902 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
12903 | (struct symbol *) templ_func); | |
4c2df51b | 12904 | |
81873cc8 | 12905 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 12906 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
12907 | cu->language); |
12908 | ||
4cecd739 DJ |
12909 | /* If there is a location expression for DW_AT_frame_base, record |
12910 | it. */ | |
e142c38c | 12911 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 12912 | if (attr != nullptr) |
fe978cb0 | 12913 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 12914 | |
63e43d3a PMR |
12915 | /* If there is a location for the static link, record it. */ |
12916 | newobj->static_link = NULL; | |
12917 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 12918 | if (attr != nullptr) |
63e43d3a | 12919 | { |
224c3ddb SM |
12920 | newobj->static_link |
12921 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d | 12922 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
09ba997f | 12923 | cu->per_cu->addr_type ()); |
63e43d3a PMR |
12924 | } |
12925 | ||
c24bdb02 | 12926 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 12927 | |
639d11d3 | 12928 | if (die->child != NULL) |
c906108c | 12929 | { |
639d11d3 | 12930 | child_die = die->child; |
c906108c SS |
12931 | while (child_die && child_die->tag) |
12932 | { | |
34eaf542 TT |
12933 | if (child_die->tag == DW_TAG_template_type_param |
12934 | || child_die->tag == DW_TAG_template_value_param) | |
12935 | { | |
12936 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
12937 | ||
f1078f66 | 12938 | if (arg != NULL) |
2f4732b0 | 12939 | template_args.push_back (arg); |
34eaf542 TT |
12940 | } |
12941 | else | |
12942 | process_die (child_die, cu); | |
c906108c SS |
12943 | child_die = sibling_die (child_die); |
12944 | } | |
12945 | } | |
12946 | ||
d389af10 JK |
12947 | inherit_abstract_dies (die, cu); |
12948 | ||
4a811a97 UW |
12949 | /* If we have a DW_AT_specification, we might need to import using |
12950 | directives from the context of the specification DIE. See the | |
12951 | comment in determine_prefix. */ | |
12952 | if (cu->language == language_cplus | |
12953 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
12954 | { | |
12955 | struct dwarf2_cu *spec_cu = cu; | |
12956 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
12957 | ||
12958 | while (spec_die) | |
12959 | { | |
12960 | child_die = spec_die->child; | |
12961 | while (child_die && child_die->tag) | |
12962 | { | |
12963 | if (child_die->tag == DW_TAG_imported_module) | |
12964 | process_die (child_die, spec_cu); | |
12965 | child_die = sibling_die (child_die); | |
12966 | } | |
12967 | ||
12968 | /* In some cases, GCC generates specification DIEs that | |
12969 | themselves contain DW_AT_specification attributes. */ | |
12970 | spec_die = die_specification (spec_die, &spec_cu); | |
12971 | } | |
12972 | } | |
12973 | ||
c24bdb02 | 12974 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 12975 | /* Make a block for the local symbols within. */ |
c24bdb02 | 12976 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 12977 | cstk.static_link, lowpc, highpc); |
801e3a5b | 12978 | |
df8a16a1 | 12979 | /* For C++, set the block's scope. */ |
45280282 IB |
12980 | if ((cu->language == language_cplus |
12981 | || cu->language == language_fortran | |
c44af4eb TT |
12982 | || cu->language == language_d |
12983 | || cu->language == language_rust) | |
4d4ec4e5 | 12984 | && cu->processing_has_namespace_info) |
195a3f6c TT |
12985 | block_set_scope (block, determine_prefix (die, cu), |
12986 | &objfile->objfile_obstack); | |
df8a16a1 | 12987 | |
801e3a5b JB |
12988 | /* If we have address ranges, record them. */ |
12989 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 12990 | |
a60f3166 | 12991 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 12992 | |
34eaf542 | 12993 | /* Attach template arguments to function. */ |
2f4732b0 | 12994 | if (!template_args.empty ()) |
34eaf542 TT |
12995 | { |
12996 | gdb_assert (templ_func != NULL); | |
12997 | ||
2f4732b0 | 12998 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 12999 | templ_func->template_arguments |
8d749320 SM |
13000 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
13001 | templ_func->n_template_arguments); | |
34eaf542 | 13002 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13003 | template_args.data (), |
34eaf542 | 13004 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13005 | |
13006 | /* Make sure that the symtab is set on the new symbols. Even | |
13007 | though they don't appear in this symtab directly, other parts | |
13008 | of gdb assume that symbols do, and this is reasonably | |
13009 | true. */ | |
8634679f | 13010 | for (symbol *sym : template_args) |
3e1d3d8c | 13011 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13012 | } |
13013 | ||
208d8187 JB |
13014 | /* In C++, we can have functions nested inside functions (e.g., when |
13015 | a function declares a class that has methods). This means that | |
13016 | when we finish processing a function scope, we may need to go | |
13017 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13018 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13019 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13020 | |
921e78cf JB |
13021 | /* If we've finished processing a top-level function, subsequent |
13022 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13023 | if (cu->get_builder ()->outermost_context_p ()) |
13024 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13025 | } |
13026 | ||
13027 | /* Process all the DIES contained within a lexical block scope. Start | |
13028 | a new scope, process the dies, and then close the scope. */ | |
13029 | ||
13030 | static void | |
e7c27a73 | 13031 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13032 | { |
518817b3 | 13033 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 13034 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
13035 | CORE_ADDR lowpc, highpc; |
13036 | struct die_info *child_die; | |
e142c38c DJ |
13037 | CORE_ADDR baseaddr; |
13038 | ||
b3b3bada | 13039 | baseaddr = objfile->text_section_offset (); |
c906108c SS |
13040 | |
13041 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13042 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13043 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13044 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13045 | describe ranges. */ |
e385593e JK |
13046 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13047 | { | |
13048 | case PC_BOUNDS_NOT_PRESENT: | |
13049 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13050 | there was no wrapping by that DW_TAG_lexical_block. | |
13051 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13052 | for (child_die = die->child; | |
13053 | child_die != NULL && child_die->tag; | |
13054 | child_die = sibling_die (child_die)) | |
13055 | process_die (child_die, cu); | |
13056 | return; | |
13057 | case PC_BOUNDS_INVALID: | |
13058 | return; | |
13059 | } | |
3e29f34a MR |
13060 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13061 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13062 | |
c24bdb02 | 13063 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13064 | if (die->child != NULL) |
c906108c | 13065 | { |
639d11d3 | 13066 | child_die = die->child; |
c906108c SS |
13067 | while (child_die && child_die->tag) |
13068 | { | |
e7c27a73 | 13069 | process_die (child_die, cu); |
c906108c SS |
13070 | child_die = sibling_die (child_die); |
13071 | } | |
13072 | } | |
3ea89b92 | 13073 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13074 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13075 | |
c24bdb02 KS |
13076 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13077 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13078 | { |
801e3a5b | 13079 | struct block *block |
c24bdb02 | 13080 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13081 | cstk.start_addr, highpc); |
801e3a5b JB |
13082 | |
13083 | /* Note that recording ranges after traversing children, as we | |
13084 | do here, means that recording a parent's ranges entails | |
13085 | walking across all its children's ranges as they appear in | |
13086 | the address map, which is quadratic behavior. | |
13087 | ||
13088 | It would be nicer to record the parent's ranges before | |
13089 | traversing its children, simply overriding whatever you find | |
13090 | there. But since we don't even decide whether to create a | |
13091 | block until after we've traversed its children, that's hard | |
13092 | to do. */ | |
13093 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
c906108c | 13094 | } |
c24bdb02 KS |
13095 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13096 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13097 | } |
13098 | ||
216f72a1 | 13099 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13100 | |
13101 | static void | |
13102 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13103 | { | |
518817b3 | 13104 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
96408a79 SA |
13105 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
13106 | CORE_ADDR pc, baseaddr; | |
13107 | struct attribute *attr; | |
13108 | struct call_site *call_site, call_site_local; | |
13109 | void **slot; | |
13110 | int nparams; | |
13111 | struct die_info *child_die; | |
13112 | ||
b3b3bada | 13113 | baseaddr = objfile->text_section_offset (); |
96408a79 | 13114 | |
216f72a1 JK |
13115 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13116 | if (attr == NULL) | |
13117 | { | |
13118 | /* This was a pre-DWARF-5 GNU extension alias | |
13119 | for DW_AT_call_return_pc. */ | |
13120 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13121 | } | |
96408a79 SA |
13122 | if (!attr) |
13123 | { | |
b98664d3 | 13124 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13125 | "DIE %s [in module %s]"), |
13126 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13127 | return; |
13128 | } | |
cd6c91b4 | 13129 | pc = attr->value_as_address () + baseaddr; |
3e29f34a | 13130 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13131 | |
13132 | if (cu->call_site_htab == NULL) | |
13133 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13134 | NULL, &objfile->objfile_obstack, | |
13135 | hashtab_obstack_allocate, NULL); | |
13136 | call_site_local.pc = pc; | |
13137 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13138 | if (*slot != NULL) | |
13139 | { | |
b98664d3 | 13140 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13141 | "DIE %s [in module %s]"), |
13142 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13143 | objfile_name (objfile)); |
96408a79 SA |
13144 | return; |
13145 | } | |
13146 | ||
13147 | /* Count parameters at the caller. */ | |
13148 | ||
13149 | nparams = 0; | |
13150 | for (child_die = die->child; child_die && child_die->tag; | |
13151 | child_die = sibling_die (child_die)) | |
13152 | { | |
216f72a1 JK |
13153 | if (child_die->tag != DW_TAG_call_site_parameter |
13154 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 | 13155 | { |
b98664d3 | 13156 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13157 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13158 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13159 | objfile_name (objfile)); |
96408a79 SA |
13160 | continue; |
13161 | } | |
13162 | ||
13163 | nparams++; | |
13164 | } | |
13165 | ||
224c3ddb SM |
13166 | call_site |
13167 | = ((struct call_site *) | |
13168 | obstack_alloc (&objfile->objfile_obstack, | |
13169 | sizeof (*call_site) | |
13170 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13171 | *slot = call_site; |
13172 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13173 | call_site->pc = pc; | |
13174 | ||
216f72a1 JK |
13175 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13176 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13177 | { |
13178 | struct die_info *func_die; | |
13179 | ||
13180 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13181 | for (func_die = die->parent; | |
13182 | func_die && func_die->tag != DW_TAG_subprogram | |
13183 | && func_die->tag != DW_TAG_subroutine_type; | |
13184 | func_die = func_die->parent); | |
13185 | ||
216f72a1 JK |
13186 | /* DW_AT_call_all_calls is a superset |
13187 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13188 | if (func_die |
216f72a1 | 13189 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
96408a79 | 13190 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) |
216f72a1 | 13191 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13192 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13193 | { | |
13194 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13195 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13196 | both the initial caller containing the real return address PC and | |
13197 | the final callee containing the current PC of a chain of tail | |
13198 | calls do not need to have the tail call list complete. But any | |
13199 | function candidate for a virtual tail call frame searched via | |
13200 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13201 | determined unambiguously. */ | |
13202 | } | |
13203 | else | |
13204 | { | |
13205 | struct type *func_type = NULL; | |
13206 | ||
13207 | if (func_die) | |
13208 | func_type = get_die_type (func_die, cu); | |
13209 | if (func_type != NULL) | |
13210 | { | |
13211 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC); | |
13212 | ||
13213 | /* Enlist this call site to the function. */ | |
13214 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13215 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13216 | } | |
13217 | else | |
b98664d3 | 13218 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13219 | "DIE %s [in module %s]"), |
13220 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13221 | } |
13222 | } | |
13223 | ||
216f72a1 JK |
13224 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13225 | if (attr == NULL) | |
13226 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13227 | if (attr == NULL) | |
13228 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13229 | if (attr == NULL) |
216f72a1 JK |
13230 | { |
13231 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13232 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13233 | } | |
96408a79 | 13234 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
4fc6c0d5 | 13235 | if (!attr || (attr->form_is_block () && DW_BLOCK (attr)->size == 0)) |
96408a79 | 13236 | /* Keep NULL DWARF_BLOCK. */; |
4fc6c0d5 | 13237 | else if (attr->form_is_block ()) |
96408a79 SA |
13238 | { |
13239 | struct dwarf2_locexpr_baton *dlbaton; | |
13240 | ||
8d749320 | 13241 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
96408a79 SA |
13242 | dlbaton->data = DW_BLOCK (attr)->data; |
13243 | dlbaton->size = DW_BLOCK (attr)->size; | |
13244 | dlbaton->per_cu = cu->per_cu; | |
13245 | ||
13246 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13247 | } | |
cd6c91b4 | 13248 | else if (attr->form_is_ref ()) |
96408a79 | 13249 | { |
96408a79 SA |
13250 | struct dwarf2_cu *target_cu = cu; |
13251 | struct die_info *target_die; | |
13252 | ||
ac9ec31b | 13253 | target_die = follow_die_ref (die, attr, &target_cu); |
518817b3 | 13254 | gdb_assert (target_cu->per_cu->dwarf2_per_objfile->objfile == objfile); |
96408a79 SA |
13255 | if (die_is_declaration (target_die, target_cu)) |
13256 | { | |
7d45c7c3 | 13257 | const char *target_physname; |
9112db09 JK |
13258 | |
13259 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13260 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13261 | if (target_physname == NULL) |
9112db09 | 13262 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13263 | if (target_physname == NULL) |
b98664d3 | 13264 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13265 | "physname, for referencing DIE %s [in module %s]"), |
13266 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13267 | else |
7d455152 | 13268 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
13269 | } |
13270 | else | |
13271 | { | |
13272 | CORE_ADDR lowpc; | |
13273 | ||
13274 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 13275 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 13276 | <= PC_BOUNDS_INVALID) |
b98664d3 | 13277 | complaint (_("DW_AT_call_target target DIE has invalid " |
9d8780f0 SM |
13278 | "low pc, for referencing DIE %s [in module %s]"), |
13279 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 | 13280 | else |
3e29f34a MR |
13281 | { |
13282 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
13283 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
13284 | } | |
96408a79 SA |
13285 | } |
13286 | } | |
13287 | else | |
b98664d3 | 13288 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
13289 | "block nor reference, for DIE %s [in module %s]"), |
13290 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13291 | |
13292 | call_site->per_cu = cu->per_cu; | |
13293 | ||
13294 | for (child_die = die->child; | |
13295 | child_die && child_die->tag; | |
13296 | child_die = sibling_die (child_die)) | |
13297 | { | |
96408a79 | 13298 | struct call_site_parameter *parameter; |
1788b2d3 | 13299 | struct attribute *loc, *origin; |
96408a79 | 13300 | |
216f72a1 JK |
13301 | if (child_die->tag != DW_TAG_call_site_parameter |
13302 | && child_die->tag != DW_TAG_GNU_call_site_parameter) | |
96408a79 SA |
13303 | { |
13304 | /* Already printed the complaint above. */ | |
13305 | continue; | |
13306 | } | |
13307 | ||
13308 | gdb_assert (call_site->parameter_count < nparams); | |
13309 | parameter = &call_site->parameter[call_site->parameter_count]; | |
13310 | ||
1788b2d3 JK |
13311 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
13312 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 13313 | register is contained in DW_AT_call_value. */ |
96408a79 | 13314 | |
24c5c679 | 13315 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
13316 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
13317 | if (origin == NULL) | |
13318 | { | |
13319 | /* This was a pre-DWARF-5 GNU extension alias | |
13320 | for DW_AT_call_parameter. */ | |
13321 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
13322 | } | |
cd6c91b4 | 13323 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
1788b2d3 | 13324 | { |
1788b2d3 | 13325 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 PA |
13326 | |
13327 | sect_offset sect_off | |
13328 | = (sect_offset) dwarf2_get_ref_die_offset (origin); | |
4057dfde | 13329 | if (!cu->header.offset_in_cu_p (sect_off)) |
d76b7dbc JK |
13330 | { |
13331 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
13332 | binding can be done only inside one CU. Such referenced DIE | |
13333 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 13334 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
13335 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13336 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13337 | objfile_name (objfile)); |
d76b7dbc JK |
13338 | continue; |
13339 | } | |
9c541725 PA |
13340 | parameter->u.param_cu_off |
13341 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 | 13342 | } |
4fc6c0d5 | 13343 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
96408a79 | 13344 | { |
b98664d3 | 13345 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
13346 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13347 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13348 | continue; |
13349 | } | |
24c5c679 | 13350 | else |
96408a79 | 13351 | { |
24c5c679 JK |
13352 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
13353 | (DW_BLOCK (loc)->data, &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size]); | |
13354 | if (parameter->u.dwarf_reg != -1) | |
13355 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
13356 | else if (dwarf_block_to_sp_offset (gdbarch, DW_BLOCK (loc)->data, | |
13357 | &DW_BLOCK (loc)->data[DW_BLOCK (loc)->size], | |
13358 | ¶meter->u.fb_offset)) | |
13359 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13360 | else | |
13361 | { | |
b98664d3 | 13362 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 13363 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 13364 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 13365 | "[in module %s]"), |
9d8780f0 | 13366 | sect_offset_str (child_die->sect_off), |
9c541725 | 13367 | objfile_name (objfile)); |
24c5c679 JK |
13368 | continue; |
13369 | } | |
96408a79 SA |
13370 | } |
13371 | ||
216f72a1 JK |
13372 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13373 | if (attr == NULL) | |
13374 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
4fc6c0d5 | 13375 | if (attr == NULL || !attr->form_is_block ()) |
96408a79 | 13376 | { |
b98664d3 | 13377 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
13378 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13379 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13380 | objfile_name (objfile)); |
96408a79 SA |
13381 | continue; |
13382 | } | |
13383 | parameter->value = DW_BLOCK (attr)->data; | |
13384 | parameter->value_size = DW_BLOCK (attr)->size; | |
13385 | ||
13386 | /* Parameters are not pre-cleared by memset above. */ | |
13387 | parameter->data_value = NULL; | |
13388 | parameter->data_value_size = 0; | |
13389 | call_site->parameter_count++; | |
13390 | ||
216f72a1 JK |
13391 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13392 | if (attr == NULL) | |
13393 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 13394 | if (attr != nullptr) |
96408a79 | 13395 | { |
4fc6c0d5 | 13396 | if (!attr->form_is_block ()) |
b98664d3 | 13397 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
13398 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13399 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13400 | objfile_name (objfile)); |
96408a79 SA |
13401 | else |
13402 | { | |
13403 | parameter->data_value = DW_BLOCK (attr)->data; | |
13404 | parameter->data_value_size = DW_BLOCK (attr)->size; | |
13405 | } | |
13406 | } | |
13407 | } | |
13408 | } | |
13409 | ||
71a3c369 TT |
13410 | /* Helper function for read_variable. If DIE represents a virtual |
13411 | table, then return the type of the concrete object that is | |
13412 | associated with the virtual table. Otherwise, return NULL. */ | |
13413 | ||
13414 | static struct type * | |
13415 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13416 | { | |
13417 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13418 | if (attr == NULL) | |
13419 | return NULL; | |
13420 | ||
13421 | /* Find the type DIE. */ | |
13422 | struct die_info *type_die = NULL; | |
13423 | struct dwarf2_cu *type_cu = cu; | |
13424 | ||
cd6c91b4 | 13425 | if (attr->form_is_ref ()) |
71a3c369 TT |
13426 | type_die = follow_die_ref (die, attr, &type_cu); |
13427 | if (type_die == NULL) | |
13428 | return NULL; | |
13429 | ||
13430 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13431 | return NULL; | |
13432 | return die_containing_type (type_die, type_cu); | |
13433 | } | |
13434 | ||
13435 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13436 | ||
13437 | static void | |
13438 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13439 | { | |
13440 | struct rust_vtable_symbol *storage = NULL; | |
13441 | ||
13442 | if (cu->language == language_rust) | |
13443 | { | |
13444 | struct type *containing_type = rust_containing_type (die, cu); | |
13445 | ||
13446 | if (containing_type != NULL) | |
13447 | { | |
518817b3 | 13448 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
71a3c369 | 13449 | |
468c0cbb | 13450 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol (); |
71a3c369 TT |
13451 | initialize_objfile_symbol (storage); |
13452 | storage->concrete_type = containing_type; | |
cf724bc9 | 13453 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13454 | } |
13455 | } | |
13456 | ||
e4a62c65 TV |
13457 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
13458 | struct attribute *abstract_origin | |
13459 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13460 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
13461 | if (res == NULL && loc && abstract_origin) | |
13462 | { | |
13463 | /* We have a variable without a name, but with a location and an abstract | |
13464 | origin. This may be a concrete instance of an abstract variable | |
13465 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
13466 | later. */ | |
13467 | struct dwarf2_cu *origin_cu = cu; | |
13468 | struct die_info *origin_die | |
13469 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
13470 | dwarf2_per_objfile *dpo = cu->per_cu->dwarf2_per_objfile; | |
3360b6e7 | 13471 | dpo->abstract_to_concrete[origin_die->sect_off].push_back (die->sect_off); |
e4a62c65 | 13472 | } |
71a3c369 TT |
13473 | } |
13474 | ||
43988095 JK |
13475 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13476 | reading .debug_rnglists. | |
13477 | Callback's type should be: | |
13478 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13479 | Return true if the attributes are present and valid, otherwise, | |
13480 | return false. */ | |
13481 | ||
13482 | template <typename Callback> | |
13483 | static bool | |
13484 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
13485 | Callback &&callback) | |
13486 | { | |
ed2dc618 | 13487 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13488 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13489 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43988095 | 13490 | bfd *obfd = objfile->obfd; |
43988095 JK |
13491 | /* Base address selection entry. */ |
13492 | CORE_ADDR base; | |
13493 | int found_base; | |
43988095 | 13494 | const gdb_byte *buffer; |
43988095 JK |
13495 | CORE_ADDR baseaddr; |
13496 | bool overflow = false; | |
13497 | ||
13498 | found_base = cu->base_known; | |
13499 | base = cu->base_address; | |
13500 | ||
96b79293 | 13501 | dwarf2_per_objfile->rnglists.read (objfile); |
43988095 JK |
13502 | if (offset >= dwarf2_per_objfile->rnglists.size) |
13503 | { | |
b98664d3 | 13504 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
13505 | offset); |
13506 | return false; | |
13507 | } | |
13508 | buffer = dwarf2_per_objfile->rnglists.buffer + offset; | |
13509 | ||
b3b3bada | 13510 | baseaddr = objfile->text_section_offset (); |
43988095 JK |
13511 | |
13512 | while (1) | |
13513 | { | |
7814882a JK |
13514 | /* Initialize it due to a false compiler warning. */ |
13515 | CORE_ADDR range_beginning = 0, range_end = 0; | |
43988095 JK |
13516 | const gdb_byte *buf_end = (dwarf2_per_objfile->rnglists.buffer |
13517 | + dwarf2_per_objfile->rnglists.size); | |
13518 | unsigned int bytes_read; | |
13519 | ||
13520 | if (buffer == buf_end) | |
13521 | { | |
13522 | overflow = true; | |
13523 | break; | |
13524 | } | |
13525 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13526 | switch (rlet) | |
13527 | { | |
13528 | case DW_RLE_end_of_list: | |
13529 | break; | |
13530 | case DW_RLE_base_address: | |
13531 | if (buffer + cu->header.addr_size > buf_end) | |
13532 | { | |
13533 | overflow = true; | |
13534 | break; | |
13535 | } | |
c8a7a66f | 13536 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13537 | found_base = 1; |
13538 | buffer += bytes_read; | |
13539 | break; | |
13540 | case DW_RLE_start_length: | |
13541 | if (buffer + cu->header.addr_size > buf_end) | |
13542 | { | |
13543 | overflow = true; | |
13544 | break; | |
13545 | } | |
c8a7a66f TT |
13546 | range_beginning = cu->header.read_address (obfd, buffer, |
13547 | &bytes_read); | |
43988095 JK |
13548 | buffer += bytes_read; |
13549 | range_end = (range_beginning | |
13550 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13551 | buffer += bytes_read; | |
13552 | if (buffer > buf_end) | |
13553 | { | |
13554 | overflow = true; | |
13555 | break; | |
13556 | } | |
13557 | break; | |
13558 | case DW_RLE_offset_pair: | |
13559 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13560 | buffer += bytes_read; | |
13561 | if (buffer > buf_end) | |
13562 | { | |
13563 | overflow = true; | |
13564 | break; | |
13565 | } | |
13566 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13567 | buffer += bytes_read; | |
13568 | if (buffer > buf_end) | |
13569 | { | |
13570 | overflow = true; | |
13571 | break; | |
13572 | } | |
13573 | break; | |
13574 | case DW_RLE_start_end: | |
13575 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13576 | { | |
13577 | overflow = true; | |
13578 | break; | |
13579 | } | |
c8a7a66f TT |
13580 | range_beginning = cu->header.read_address (obfd, buffer, |
13581 | &bytes_read); | |
43988095 | 13582 | buffer += bytes_read; |
c8a7a66f | 13583 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13584 | buffer += bytes_read; |
13585 | break; | |
13586 | default: | |
b98664d3 | 13587 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13588 | return false; |
13589 | } | |
13590 | if (rlet == DW_RLE_end_of_list || overflow) | |
13591 | break; | |
13592 | if (rlet == DW_RLE_base_address) | |
13593 | continue; | |
13594 | ||
13595 | if (!found_base) | |
13596 | { | |
13597 | /* We have no valid base address for the ranges | |
13598 | data. */ | |
b98664d3 | 13599 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13600 | return false; |
13601 | } | |
13602 | ||
13603 | if (range_beginning > range_end) | |
13604 | { | |
13605 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13606 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
13607 | return false; |
13608 | } | |
13609 | ||
13610 | /* Empty range entries have no effect. */ | |
13611 | if (range_beginning == range_end) | |
13612 | continue; | |
13613 | ||
13614 | range_beginning += base; | |
13615 | range_end += base; | |
13616 | ||
13617 | /* A not-uncommon case of bad debug info. | |
13618 | Don't pollute the addrmap with bad data. */ | |
13619 | if (range_beginning + baseaddr == 0 | |
13620 | && !dwarf2_per_objfile->has_section_at_zero) | |
13621 | { | |
b98664d3 | 13622 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
13623 | " [in module %s]"), objfile_name (objfile)); |
13624 | continue; | |
13625 | } | |
13626 | ||
13627 | callback (range_beginning, range_end); | |
13628 | } | |
13629 | ||
13630 | if (overflow) | |
13631 | { | |
b98664d3 | 13632 | complaint (_("Offset %d is not terminated " |
43988095 JK |
13633 | "for DW_AT_ranges attribute"), |
13634 | offset); | |
13635 | return false; | |
13636 | } | |
13637 | ||
13638 | return true; | |
13639 | } | |
13640 | ||
13641 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13642 | Callback's type should be: | |
13643 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13644 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13645 | |
43988095 | 13646 | template <typename Callback> |
43039443 | 13647 | static int |
5f46c5a5 | 13648 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, |
43988095 | 13649 | Callback &&callback) |
43039443 | 13650 | { |
ed2dc618 | 13651 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 13652 | = cu->per_cu->dwarf2_per_objfile; |
ed2dc618 | 13653 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
43039443 JK |
13654 | struct comp_unit_head *cu_header = &cu->header; |
13655 | bfd *obfd = objfile->obfd; | |
13656 | unsigned int addr_size = cu_header->addr_size; | |
13657 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13658 | /* Base address selection entry. */ | |
13659 | CORE_ADDR base; | |
13660 | int found_base; | |
13661 | unsigned int dummy; | |
d521ce57 | 13662 | const gdb_byte *buffer; |
ff013f42 | 13663 | CORE_ADDR baseaddr; |
43039443 | 13664 | |
43988095 JK |
13665 | if (cu_header->version >= 5) |
13666 | return dwarf2_rnglists_process (offset, cu, callback); | |
13667 | ||
d00adf39 DE |
13668 | found_base = cu->base_known; |
13669 | base = cu->base_address; | |
43039443 | 13670 | |
96b79293 | 13671 | dwarf2_per_objfile->ranges.read (objfile); |
dce234bc | 13672 | if (offset >= dwarf2_per_objfile->ranges.size) |
43039443 | 13673 | { |
b98664d3 | 13674 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
13675 | offset); |
13676 | return 0; | |
13677 | } | |
dce234bc | 13678 | buffer = dwarf2_per_objfile->ranges.buffer + offset; |
43039443 | 13679 | |
b3b3bada | 13680 | baseaddr = objfile->text_section_offset (); |
ff013f42 | 13681 | |
43039443 JK |
13682 | while (1) |
13683 | { | |
13684 | CORE_ADDR range_beginning, range_end; | |
13685 | ||
c8a7a66f | 13686 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
43039443 | 13687 | buffer += addr_size; |
c8a7a66f | 13688 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
43039443 JK |
13689 | buffer += addr_size; |
13690 | offset += 2 * addr_size; | |
13691 | ||
13692 | /* An end of list marker is a pair of zero addresses. */ | |
13693 | if (range_beginning == 0 && range_end == 0) | |
13694 | /* Found the end of list entry. */ | |
13695 | break; | |
13696 | ||
13697 | /* Each base address selection entry is a pair of 2 values. | |
13698 | The first is the largest possible address, the second is | |
13699 | the base address. Check for a base address here. */ | |
13700 | if ((range_beginning & mask) == mask) | |
13701 | { | |
28d2bfb9 AB |
13702 | /* If we found the largest possible address, then we already |
13703 | have the base address in range_end. */ | |
13704 | base = range_end; | |
43039443 JK |
13705 | found_base = 1; |
13706 | continue; | |
13707 | } | |
13708 | ||
13709 | if (!found_base) | |
13710 | { | |
13711 | /* We have no valid base address for the ranges | |
13712 | data. */ | |
b98664d3 | 13713 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
13714 | return 0; |
13715 | } | |
13716 | ||
9277c30c UW |
13717 | if (range_beginning > range_end) |
13718 | { | |
13719 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13720 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
13721 | return 0; |
13722 | } | |
13723 | ||
13724 | /* Empty range entries have no effect. */ | |
13725 | if (range_beginning == range_end) | |
13726 | continue; | |
13727 | ||
43039443 JK |
13728 | range_beginning += base; |
13729 | range_end += base; | |
13730 | ||
01093045 DE |
13731 | /* A not-uncommon case of bad debug info. |
13732 | Don't pollute the addrmap with bad data. */ | |
13733 | if (range_beginning + baseaddr == 0 | |
13734 | && !dwarf2_per_objfile->has_section_at_zero) | |
13735 | { | |
b98664d3 | 13736 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 13737 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13738 | continue; |
13739 | } | |
13740 | ||
5f46c5a5 JK |
13741 | callback (range_beginning, range_end); |
13742 | } | |
13743 | ||
13744 | return 1; | |
13745 | } | |
13746 | ||
13747 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13748 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
13749 | If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */ | |
13750 | ||
13751 | static int | |
13752 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13753 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
891813be | 13754 | dwarf2_psymtab *ranges_pst) |
5f46c5a5 | 13755 | { |
518817b3 | 13756 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5f46c5a5 | 13757 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
b3b3bada | 13758 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
5f46c5a5 JK |
13759 | int low_set = 0; |
13760 | CORE_ADDR low = 0; | |
13761 | CORE_ADDR high = 0; | |
13762 | int retval; | |
13763 | ||
13764 | retval = dwarf2_ranges_process (offset, cu, | |
13765 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13766 | { | |
9277c30c | 13767 | if (ranges_pst != NULL) |
3e29f34a MR |
13768 | { |
13769 | CORE_ADDR lowpc; | |
13770 | CORE_ADDR highpc; | |
13771 | ||
79748972 TT |
13772 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
13773 | range_beginning + baseaddr) | |
13774 | - baseaddr); | |
13775 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
13776 | range_end + baseaddr) | |
13777 | - baseaddr); | |
d320c2b5 TT |
13778 | addrmap_set_empty (objfile->partial_symtabs->psymtabs_addrmap, |
13779 | lowpc, highpc - 1, ranges_pst); | |
3e29f34a | 13780 | } |
ff013f42 | 13781 | |
43039443 JK |
13782 | /* FIXME: This is recording everything as a low-high |
13783 | segment of consecutive addresses. We should have a | |
13784 | data structure for discontiguous block ranges | |
13785 | instead. */ | |
13786 | if (! low_set) | |
13787 | { | |
13788 | low = range_beginning; | |
13789 | high = range_end; | |
13790 | low_set = 1; | |
13791 | } | |
13792 | else | |
13793 | { | |
13794 | if (range_beginning < low) | |
13795 | low = range_beginning; | |
13796 | if (range_end > high) | |
13797 | high = range_end; | |
13798 | } | |
5f46c5a5 JK |
13799 | }); |
13800 | if (!retval) | |
13801 | return 0; | |
43039443 JK |
13802 | |
13803 | if (! low_set) | |
13804 | /* If the first entry is an end-of-list marker, the range | |
13805 | describes an empty scope, i.e. no instructions. */ | |
13806 | return 0; | |
13807 | ||
13808 | if (low_return) | |
13809 | *low_return = low; | |
13810 | if (high_return) | |
13811 | *high_return = high; | |
13812 | return 1; | |
13813 | } | |
13814 | ||
3a2b436a JK |
13815 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13816 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13817 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13818 | |
3a2b436a | 13819 | static enum pc_bounds_kind |
af34e669 | 13820 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 | 13821 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
891813be | 13822 | dwarf2_psymtab *pst) |
c906108c | 13823 | { |
518817b3 SM |
13824 | struct dwarf2_per_objfile *dwarf2_per_objfile |
13825 | = cu->per_cu->dwarf2_per_objfile; | |
c906108c | 13826 | struct attribute *attr; |
91da1414 | 13827 | struct attribute *attr_high; |
af34e669 DJ |
13828 | CORE_ADDR low = 0; |
13829 | CORE_ADDR high = 0; | |
e385593e | 13830 | enum pc_bounds_kind ret; |
c906108c | 13831 | |
91da1414 MW |
13832 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13833 | if (attr_high) | |
af34e669 | 13834 | { |
e142c38c | 13835 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13836 | if (attr != nullptr) |
91da1414 | 13837 | { |
cd6c91b4 TT |
13838 | low = attr->value_as_address (); |
13839 | high = attr_high->value_as_address (); | |
13840 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) | |
31aa7e4e | 13841 | high += low; |
91da1414 | 13842 | } |
af34e669 DJ |
13843 | else |
13844 | /* Found high w/o low attribute. */ | |
e385593e | 13845 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
13846 | |
13847 | /* Found consecutive range of addresses. */ | |
3a2b436a | 13848 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 13849 | } |
c906108c | 13850 | else |
af34e669 | 13851 | { |
e142c38c | 13852 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
af34e669 DJ |
13853 | if (attr != NULL) |
13854 | { | |
18a8505e | 13855 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
13856 | We take advantage of the fact that DW_AT_ranges does not appear |
13857 | in DW_TAG_compile_unit of DWO files. */ | |
13858 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
13859 | unsigned int ranges_offset = (DW_UNSND (attr) | |
13860 | + (need_ranges_base | |
13861 | ? cu->ranges_base | |
13862 | : 0)); | |
2e3cf129 | 13863 | |
af34e669 | 13864 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 13865 | .debug_ranges section. */ |
2e3cf129 | 13866 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst)) |
e385593e | 13867 | return PC_BOUNDS_INVALID; |
43039443 | 13868 | /* Found discontinuous range of addresses. */ |
3a2b436a | 13869 | ret = PC_BOUNDS_RANGES; |
af34e669 | 13870 | } |
e385593e JK |
13871 | else |
13872 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 13873 | } |
c906108c | 13874 | |
48fbe735 | 13875 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 13876 | if (high <= low) |
e385593e | 13877 | return PC_BOUNDS_INVALID; |
c906108c SS |
13878 | |
13879 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
13880 | eliminate duplicate copies of functions and vtables and such. | |
13881 | The linker will arbitrarily choose one and discard the others. | |
13882 | The AT_*_pc values for such functions refer to local labels in | |
13883 | these sections. If the section from that file was discarded, the | |
13884 | labels are not in the output, so the relocs get a value of 0. | |
13885 | If this is a discarded function, mark the pc bounds as invalid, | |
13886 | so that GDB will ignore it. */ | |
72dca2f5 | 13887 | if (low == 0 && !dwarf2_per_objfile->has_section_at_zero) |
e385593e | 13888 | return PC_BOUNDS_INVALID; |
c906108c SS |
13889 | |
13890 | *lowpc = low; | |
96408a79 SA |
13891 | if (highpc) |
13892 | *highpc = high; | |
af34e669 | 13893 | return ret; |
c906108c SS |
13894 | } |
13895 | ||
b084d499 JB |
13896 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
13897 | its low and high PC addresses. Do nothing if these addresses could not | |
13898 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
13899 | and HIGHPC to the high address if greater than HIGHPC. */ | |
13900 | ||
13901 | static void | |
13902 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
13903 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13904 | struct dwarf2_cu *cu) | |
13905 | { | |
13906 | CORE_ADDR low, high; | |
13907 | struct die_info *child = die->child; | |
13908 | ||
e385593e | 13909 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 13910 | { |
325fac50 PA |
13911 | *lowpc = std::min (*lowpc, low); |
13912 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
13913 | } |
13914 | ||
13915 | /* If the language does not allow nested subprograms (either inside | |
13916 | subprograms or lexical blocks), we're done. */ | |
13917 | if (cu->language != language_ada) | |
13918 | return; | |
6e70227d | 13919 | |
b084d499 JB |
13920 | /* Check all the children of the given DIE. If it contains nested |
13921 | subprograms, then check their pc bounds. Likewise, we need to | |
13922 | check lexical blocks as well, as they may also contain subprogram | |
13923 | definitions. */ | |
13924 | while (child && child->tag) | |
13925 | { | |
13926 | if (child->tag == DW_TAG_subprogram | |
13927 | || child->tag == DW_TAG_lexical_block) | |
13928 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
13929 | child = sibling_die (child); | |
13930 | } | |
13931 | } | |
13932 | ||
fae299cd DC |
13933 | /* Get the low and high pc's represented by the scope DIE, and store |
13934 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
13935 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
13936 | ||
13937 | static void | |
13938 | get_scope_pc_bounds (struct die_info *die, | |
13939 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
13940 | struct dwarf2_cu *cu) | |
13941 | { | |
13942 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
13943 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
13944 | CORE_ADDR current_low, current_high; | |
13945 | ||
3a2b436a | 13946 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 13947 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
13948 | { |
13949 | best_low = current_low; | |
13950 | best_high = current_high; | |
13951 | } | |
13952 | else | |
13953 | { | |
13954 | struct die_info *child = die->child; | |
13955 | ||
13956 | while (child && child->tag) | |
13957 | { | |
13958 | switch (child->tag) { | |
13959 | case DW_TAG_subprogram: | |
b084d499 | 13960 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
13961 | break; |
13962 | case DW_TAG_namespace: | |
f55ee35c | 13963 | case DW_TAG_module: |
fae299cd DC |
13964 | /* FIXME: carlton/2004-01-16: Should we do this for |
13965 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
13966 | that current GCC's always emit the DIEs corresponding | |
13967 | to definitions of methods of classes as children of a | |
13968 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
13969 | the DIEs giving the declarations, which could be | |
13970 | anywhere). But I don't see any reason why the | |
13971 | standards says that they have to be there. */ | |
13972 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
13973 | ||
13974 | if (current_low != ((CORE_ADDR) -1)) | |
13975 | { | |
325fac50 PA |
13976 | best_low = std::min (best_low, current_low); |
13977 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
13978 | } |
13979 | break; | |
13980 | default: | |
0963b4bd | 13981 | /* Ignore. */ |
fae299cd DC |
13982 | break; |
13983 | } | |
13984 | ||
13985 | child = sibling_die (child); | |
13986 | } | |
13987 | } | |
13988 | ||
13989 | *lowpc = best_low; | |
13990 | *highpc = best_high; | |
13991 | } | |
13992 | ||
801e3a5b JB |
13993 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
13994 | in DIE. */ | |
380bca97 | 13995 | |
801e3a5b JB |
13996 | static void |
13997 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
13998 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) | |
13999 | { | |
518817b3 | 14000 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3e29f34a | 14001 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
801e3a5b | 14002 | struct attribute *attr; |
91da1414 | 14003 | struct attribute *attr_high; |
801e3a5b | 14004 | |
91da1414 MW |
14005 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14006 | if (attr_high) | |
801e3a5b | 14007 | { |
801e3a5b | 14008 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14009 | if (attr != nullptr) |
801e3a5b | 14010 | { |
cd6c91b4 TT |
14011 | CORE_ADDR low = attr->value_as_address (); |
14012 | CORE_ADDR high = attr_high->value_as_address (); | |
31aa7e4e | 14013 | |
cd6c91b4 | 14014 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 14015 | high += low; |
9a619af0 | 14016 | |
3e29f34a MR |
14017 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14018 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14019 | cu->get_builder ()->record_block_range (block, low, high - 1); |
801e3a5b JB |
14020 | } |
14021 | } | |
14022 | ||
14023 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
435d3d88 | 14024 | if (attr != nullptr) |
801e3a5b | 14025 | { |
18a8505e | 14026 | /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton. |
ab435259 DE |
14027 | We take advantage of the fact that DW_AT_ranges does not appear |
14028 | in DW_TAG_compile_unit of DWO files. */ | |
14029 | int need_ranges_base = die->tag != DW_TAG_compile_unit; | |
801e3a5b JB |
14030 | |
14031 | /* The value of the DW_AT_ranges attribute is the offset of the | |
14032 | address range list in the .debug_ranges section. */ | |
ab435259 DE |
14033 | unsigned long offset = (DW_UNSND (attr) |
14034 | + (need_ranges_base ? cu->ranges_base : 0)); | |
801e3a5b | 14035 | |
2d5f09ec | 14036 | std::vector<blockrange> blockvec; |
5f46c5a5 JK |
14037 | dwarf2_ranges_process (offset, cu, |
14038 | [&] (CORE_ADDR start, CORE_ADDR end) | |
14039 | { | |
58fdfd2c JK |
14040 | start += baseaddr; |
14041 | end += baseaddr; | |
5f46c5a5 JK |
14042 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14043 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14044 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14045 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14046 | }); |
2d5f09ec KB |
14047 | |
14048 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14049 | } |
14050 | } | |
14051 | ||
685b1105 JK |
14052 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14053 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14054 | |
685b1105 JK |
14055 | static void |
14056 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14057 | { |
38360086 | 14058 | int major, minor; |
60d5a603 JK |
14059 | |
14060 | if (cu->producer == NULL) | |
14061 | { | |
14062 | /* For unknown compilers expect their behavior is DWARF version | |
14063 | compliant. | |
14064 | ||
14065 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14066 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14067 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14068 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14069 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14070 | } |
b1ffba5a | 14071 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14072 | { |
38360086 MW |
14073 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14074 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14075 | } |
5230b05a | 14076 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14077 | { |
14078 | cu->producer_is_icc = true; | |
14079 | cu->producer_is_icc_lt_14 = major < 14; | |
14080 | } | |
c258c396 JD |
14081 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14082 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14083 | else |
14084 | { | |
14085 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14086 | compliant. */ | |
60d5a603 JK |
14087 | } |
14088 | ||
9068261f | 14089 | cu->checked_producer = true; |
685b1105 | 14090 | } |
ba919b58 | 14091 | |
685b1105 JK |
14092 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14093 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14094 | during 4.6.0 experimental. */ | |
14095 | ||
9068261f | 14096 | static bool |
685b1105 JK |
14097 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14098 | { | |
14099 | if (!cu->checked_producer) | |
14100 | check_producer (cu); | |
14101 | ||
14102 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14103 | } |
14104 | ||
c258c396 JD |
14105 | |
14106 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14107 | with incorrect is_stmt attributes. */ | |
14108 | ||
14109 | static bool | |
14110 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14111 | { | |
14112 | if (!cu->checked_producer) | |
14113 | check_producer (cu); | |
14114 | ||
14115 | return cu->producer_is_codewarrior; | |
14116 | } | |
14117 | ||
405feb71 | 14118 | /* Return the default accessibility type if it is not overridden by |
60d5a603 JK |
14119 | DW_AT_accessibility. */ |
14120 | ||
14121 | static enum dwarf_access_attribute | |
14122 | dwarf2_default_access_attribute (struct die_info *die, struct dwarf2_cu *cu) | |
14123 | { | |
14124 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) | |
14125 | { | |
14126 | /* The default DWARF 2 accessibility for members is public, the default | |
14127 | accessibility for inheritance is private. */ | |
14128 | ||
14129 | if (die->tag != DW_TAG_inheritance) | |
14130 | return DW_ACCESS_public; | |
14131 | else | |
14132 | return DW_ACCESS_private; | |
14133 | } | |
14134 | else | |
14135 | { | |
14136 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14137 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14138 | depends on the container kind. */ | |
14139 | ||
14140 | if (die->parent->tag == DW_TAG_class_type) | |
14141 | return DW_ACCESS_private; | |
14142 | else | |
14143 | return DW_ACCESS_public; | |
14144 | } | |
14145 | } | |
14146 | ||
74ac6d43 TT |
14147 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14148 | offset. If the attribute was not found return 0, otherwise return | |
14149 | 1. If it was found but could not properly be handled, set *OFFSET | |
14150 | to 0. */ | |
14151 | ||
14152 | static int | |
14153 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14154 | LONGEST *offset) | |
14155 | { | |
14156 | struct attribute *attr; | |
14157 | ||
14158 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14159 | if (attr != NULL) | |
14160 | { | |
14161 | *offset = 0; | |
14162 | ||
14163 | /* Note that we do not check for a section offset first here. | |
14164 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14165 | so if we see it, we can assume that a constant form is really | |
14166 | a constant and not a section offset. */ | |
cd6c91b4 | 14167 | if (attr->form_is_constant ()) |
74ac6d43 | 14168 | *offset = dwarf2_get_attr_constant_value (attr, 0); |
cd6c91b4 | 14169 | else if (attr->form_is_section_offset ()) |
74ac6d43 | 14170 | dwarf2_complex_location_expr_complaint (); |
4fc6c0d5 | 14171 | else if (attr->form_is_block ()) |
74ac6d43 TT |
14172 | *offset = decode_locdesc (DW_BLOCK (attr), cu); |
14173 | else | |
14174 | dwarf2_complex_location_expr_complaint (); | |
14175 | ||
14176 | return 1; | |
14177 | } | |
14178 | ||
14179 | return 0; | |
14180 | } | |
14181 | ||
c906108c SS |
14182 | /* Add an aggregate field to the field list. */ |
14183 | ||
14184 | static void | |
107d2387 | 14185 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14186 | struct dwarf2_cu *cu) |
6e70227d | 14187 | { |
518817b3 | 14188 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
5e2b427d | 14189 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
14190 | struct nextfield *new_field; |
14191 | struct attribute *attr; | |
14192 | struct field *fp; | |
15d034d0 | 14193 | const char *fieldname = ""; |
c906108c | 14194 | |
7d0ccb61 DJ |
14195 | if (die->tag == DW_TAG_inheritance) |
14196 | { | |
be2daae6 TT |
14197 | fip->baseclasses.emplace_back (); |
14198 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14199 | } |
14200 | else | |
14201 | { | |
be2daae6 TT |
14202 | fip->fields.emplace_back (); |
14203 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14204 | } |
be2daae6 | 14205 | |
e142c38c | 14206 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14207 | if (attr != nullptr) |
c906108c | 14208 | new_field->accessibility = DW_UNSND (attr); |
60d5a603 JK |
14209 | else |
14210 | new_field->accessibility = dwarf2_default_access_attribute (die, cu); | |
c906108c SS |
14211 | if (new_field->accessibility != DW_ACCESS_public) |
14212 | fip->non_public_fields = 1; | |
60d5a603 | 14213 | |
e142c38c | 14214 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 14215 | if (attr != nullptr) |
c906108c | 14216 | new_field->virtuality = DW_UNSND (attr); |
60d5a603 JK |
14217 | else |
14218 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14219 | |
14220 | fp = &new_field->field; | |
a9a9bd0f | 14221 | |
e142c38c | 14222 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14223 | { |
74ac6d43 TT |
14224 | LONGEST offset; |
14225 | ||
a9a9bd0f | 14226 | /* Data member other than a C++ static data member. */ |
6e70227d | 14227 | |
c906108c | 14228 | /* Get type of field. */ |
e7c27a73 | 14229 | fp->type = die_type (die, cu); |
c906108c | 14230 | |
d6a843b5 | 14231 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14232 | |
c906108c | 14233 | /* Get bit size of field (zero if none). */ |
e142c38c | 14234 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 14235 | if (attr != nullptr) |
c906108c SS |
14236 | { |
14237 | FIELD_BITSIZE (*fp) = DW_UNSND (attr); | |
14238 | } | |
14239 | else | |
14240 | { | |
14241 | FIELD_BITSIZE (*fp) = 0; | |
14242 | } | |
14243 | ||
14244 | /* Get bit offset of field. */ | |
74ac6d43 TT |
14245 | if (handle_data_member_location (die, cu, &offset)) |
14246 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
e142c38c | 14247 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
435d3d88 | 14248 | if (attr != nullptr) |
c906108c | 14249 | { |
d5a22e77 | 14250 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
14251 | { |
14252 | /* For big endian bits, the DW_AT_bit_offset gives the | |
c5aa993b JM |
14253 | additional bit offset from the MSB of the containing |
14254 | anonymous object to the MSB of the field. We don't | |
14255 | have to do anything special since we don't need to | |
14256 | know the size of the anonymous object. */ | |
f41f5e61 | 14257 | SET_FIELD_BITPOS (*fp, FIELD_BITPOS (*fp) + DW_UNSND (attr)); |
c906108c SS |
14258 | } |
14259 | else | |
14260 | { | |
14261 | /* For little endian bits, compute the bit offset to the | |
c5aa993b JM |
14262 | MSB of the anonymous object, subtract off the number of |
14263 | bits from the MSB of the field to the MSB of the | |
14264 | object, and then subtract off the number of bits of | |
14265 | the field itself. The result is the bit offset of | |
14266 | the LSB of the field. */ | |
c906108c SS |
14267 | int anonymous_size; |
14268 | int bit_offset = DW_UNSND (attr); | |
14269 | ||
e142c38c | 14270 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 14271 | if (attr != nullptr) |
c906108c SS |
14272 | { |
14273 | /* The size of the anonymous object containing | |
14274 | the bit field is explicit, so use the | |
14275 | indicated size (in bytes). */ | |
14276 | anonymous_size = DW_UNSND (attr); | |
14277 | } | |
14278 | else | |
14279 | { | |
14280 | /* The size of the anonymous object containing | |
14281 | the bit field must be inferred from the type | |
14282 | attribute of the data member containing the | |
14283 | bit field. */ | |
14284 | anonymous_size = TYPE_LENGTH (fp->type); | |
14285 | } | |
f41f5e61 PA |
14286 | SET_FIELD_BITPOS (*fp, |
14287 | (FIELD_BITPOS (*fp) | |
14288 | + anonymous_size * bits_per_byte | |
14289 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14290 | } |
14291 | } | |
da5b30da AA |
14292 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14293 | if (attr != NULL) | |
14294 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
14295 | + dwarf2_get_attr_constant_value (attr, 0))); | |
c906108c SS |
14296 | |
14297 | /* Get name of field. */ | |
39cbfefa DJ |
14298 | fieldname = dwarf2_name (die, cu); |
14299 | if (fieldname == NULL) | |
14300 | fieldname = ""; | |
d8151005 DJ |
14301 | |
14302 | /* The name is already allocated along with this objfile, so we don't | |
14303 | need to duplicate it for the type. */ | |
14304 | fp->name = fieldname; | |
c906108c SS |
14305 | |
14306 | /* Change accessibility for artificial fields (e.g. virtual table | |
c5aa993b | 14307 | pointer or virtual base class pointer) to private. */ |
e142c38c | 14308 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 14309 | { |
d48cc9dd | 14310 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c SS |
14311 | new_field->accessibility = DW_ACCESS_private; |
14312 | fip->non_public_fields = 1; | |
14313 | } | |
14314 | } | |
a9a9bd0f | 14315 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 14316 | { |
a9a9bd0f DC |
14317 | /* C++ static member. */ |
14318 | ||
14319 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
14320 | is a declaration, but all versions of G++ as of this writing | |
14321 | (so through at least 3.2.1) incorrectly generate | |
14322 | DW_TAG_variable tags. */ | |
6e70227d | 14323 | |
ff355380 | 14324 | const char *physname; |
c906108c | 14325 | |
a9a9bd0f | 14326 | /* Get name of field. */ |
39cbfefa DJ |
14327 | fieldname = dwarf2_name (die, cu); |
14328 | if (fieldname == NULL) | |
c906108c SS |
14329 | return; |
14330 | ||
254e6b9e | 14331 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
14332 | if (attr |
14333 | /* Only create a symbol if this is an external value. | |
14334 | new_symbol checks this and puts the value in the global symbol | |
14335 | table, which we want. If it is not external, new_symbol | |
14336 | will try to put the value in cu->list_in_scope which is wrong. */ | |
14337 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
14338 | { |
14339 | /* A static const member, not much different than an enum as far as | |
14340 | we're concerned, except that we can support more types. */ | |
14341 | new_symbol (die, NULL, cu); | |
14342 | } | |
14343 | ||
2df3850c | 14344 | /* Get physical name. */ |
ff355380 | 14345 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 14346 | |
d8151005 DJ |
14347 | /* The name is already allocated along with this objfile, so we don't |
14348 | need to duplicate it for the type. */ | |
14349 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
e7c27a73 | 14350 | FIELD_TYPE (*fp) = die_type (die, cu); |
d8151005 | 14351 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
14352 | } |
14353 | else if (die->tag == DW_TAG_inheritance) | |
14354 | { | |
74ac6d43 | 14355 | LONGEST offset; |
d4b96c9a | 14356 | |
74ac6d43 TT |
14357 | /* C++ base class field. */ |
14358 | if (handle_data_member_location (die, cu, &offset)) | |
14359 | SET_FIELD_BITPOS (*fp, offset * bits_per_byte); | |
c906108c | 14360 | FIELD_BITSIZE (*fp) = 0; |
e7c27a73 | 14361 | FIELD_TYPE (*fp) = die_type (die, cu); |
a737d952 | 14362 | FIELD_NAME (*fp) = TYPE_NAME (fp->type); |
c906108c | 14363 | } |
2ddeaf8a TT |
14364 | else if (die->tag == DW_TAG_variant_part) |
14365 | { | |
14366 | /* process_structure_scope will treat this DIE as a union. */ | |
14367 | process_structure_scope (die, cu); | |
14368 | ||
14369 | /* The variant part is relative to the start of the enclosing | |
14370 | structure. */ | |
14371 | SET_FIELD_BITPOS (*fp, 0); | |
14372 | fp->type = get_die_type (die, cu); | |
14373 | fp->artificial = 1; | |
14374 | fp->name = "<<variant>>"; | |
c8c81635 TT |
14375 | |
14376 | /* Normally a DW_TAG_variant_part won't have a size, but our | |
14377 | representation requires one, so set it to the maximum of the | |
489dbda6 TT |
14378 | child sizes, being sure to account for the offset at which |
14379 | each child is seen. */ | |
c8c81635 TT |
14380 | if (TYPE_LENGTH (fp->type) == 0) |
14381 | { | |
14382 | unsigned max = 0; | |
14383 | for (int i = 0; i < TYPE_NFIELDS (fp->type); ++i) | |
489dbda6 TT |
14384 | { |
14385 | unsigned len = ((TYPE_FIELD_BITPOS (fp->type, i) + 7) / 8 | |
14386 | + TYPE_LENGTH (TYPE_FIELD_TYPE (fp->type, i))); | |
14387 | if (len > max) | |
14388 | max = len; | |
14389 | } | |
c8c81635 TT |
14390 | TYPE_LENGTH (fp->type) = max; |
14391 | } | |
2ddeaf8a TT |
14392 | } |
14393 | else | |
14394 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
14395 | } |
14396 | ||
883fd55a KS |
14397 | /* Can the type given by DIE define another type? */ |
14398 | ||
14399 | static bool | |
14400 | type_can_define_types (const struct die_info *die) | |
14401 | { | |
14402 | switch (die->tag) | |
14403 | { | |
14404 | case DW_TAG_typedef: | |
14405 | case DW_TAG_class_type: | |
14406 | case DW_TAG_structure_type: | |
14407 | case DW_TAG_union_type: | |
14408 | case DW_TAG_enumeration_type: | |
14409 | return true; | |
14410 | ||
14411 | default: | |
14412 | return false; | |
14413 | } | |
14414 | } | |
14415 | ||
14416 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
14417 | |
14418 | static void | |
883fd55a KS |
14419 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
14420 | struct dwarf2_cu *cu) | |
6e70227d | 14421 | { |
be2daae6 TT |
14422 | struct decl_field fp; |
14423 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 14424 | |
883fd55a | 14425 | gdb_assert (type_can_define_types (die)); |
98751a41 | 14426 | |
883fd55a | 14427 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
14428 | fp.name = dwarf2_name (die, cu); |
14429 | fp.type = read_type_die (die, cu); | |
98751a41 | 14430 | |
c191a687 KS |
14431 | /* Save accessibility. */ |
14432 | enum dwarf_access_attribute accessibility; | |
14433 | struct attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); | |
14434 | if (attr != NULL) | |
14435 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); | |
14436 | else | |
14437 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14438 | switch (accessibility) | |
14439 | { | |
14440 | case DW_ACCESS_public: | |
14441 | /* The assumed value if neither private nor protected. */ | |
14442 | break; | |
14443 | case DW_ACCESS_private: | |
be2daae6 | 14444 | fp.is_private = 1; |
c191a687 KS |
14445 | break; |
14446 | case DW_ACCESS_protected: | |
be2daae6 | 14447 | fp.is_protected = 1; |
c191a687 KS |
14448 | break; |
14449 | default: | |
b98664d3 | 14450 | complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility); |
c191a687 KS |
14451 | } |
14452 | ||
883fd55a | 14453 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 14454 | fip->typedef_field_list.push_back (fp); |
883fd55a | 14455 | else |
be2daae6 | 14456 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
14457 | } |
14458 | ||
c906108c SS |
14459 | /* Create the vector of fields, and attach it to the type. */ |
14460 | ||
14461 | static void | |
fba45db2 | 14462 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14463 | struct dwarf2_cu *cu) |
c906108c | 14464 | { |
317f7127 | 14465 | int nfields = fip->nfields (); |
c906108c SS |
14466 | |
14467 | /* Record the field count, allocate space for the array of fields, | |
14468 | and create blank accessibility bitfields if necessary. */ | |
14469 | TYPE_NFIELDS (type) = nfields; | |
14470 | TYPE_FIELDS (type) = (struct field *) | |
be2daae6 | 14471 | TYPE_ZALLOC (type, sizeof (struct field) * nfields); |
c906108c | 14472 | |
b4ba55a1 | 14473 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14474 | { |
14475 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14476 | ||
14477 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14478 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14479 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14480 | ||
14481 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14482 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14483 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14484 | ||
774b6a14 TT |
14485 | TYPE_FIELD_IGNORE_BITS (type) = |
14486 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14487 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14488 | } |
14489 | ||
14490 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14491 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 14492 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 14493 | { |
be2daae6 | 14494 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 14495 | unsigned char *pointer; |
c906108c SS |
14496 | |
14497 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14498 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14499 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
14500 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
14501 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
14502 | } |
14503 | ||
2ddeaf8a TT |
14504 | if (TYPE_FLAG_DISCRIMINATED_UNION (type)) |
14505 | { | |
14506 | struct discriminant_info *di = alloc_discriminant_info (type, -1, -1); | |
14507 | ||
be2daae6 | 14508 | for (int index = 0; index < nfields; ++index) |
2ddeaf8a | 14509 | { |
be2daae6 TT |
14510 | struct nextfield &field = fip->fields[index]; |
14511 | ||
14512 | if (field.variant.is_discriminant) | |
2ddeaf8a | 14513 | di->discriminant_index = index; |
be2daae6 | 14514 | else if (field.variant.default_branch) |
2ddeaf8a TT |
14515 | di->default_index = index; |
14516 | else | |
be2daae6 | 14517 | di->discriminants[index] = field.variant.discriminant_value; |
2ddeaf8a TT |
14518 | } |
14519 | } | |
14520 | ||
be2daae6 TT |
14521 | /* Copy the saved-up fields into the field vector. */ |
14522 | for (int i = 0; i < nfields; ++i) | |
c906108c | 14523 | { |
be2daae6 TT |
14524 | struct nextfield &field |
14525 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
14526 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 14527 | |
be2daae6 TT |
14528 | TYPE_FIELD (type, i) = field.field; |
14529 | switch (field.accessibility) | |
c906108c | 14530 | { |
c5aa993b | 14531 | case DW_ACCESS_private: |
b4ba55a1 | 14532 | if (cu->language != language_ada) |
be2daae6 | 14533 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 14534 | break; |
c906108c | 14535 | |
c5aa993b | 14536 | case DW_ACCESS_protected: |
b4ba55a1 | 14537 | if (cu->language != language_ada) |
be2daae6 | 14538 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 14539 | break; |
c906108c | 14540 | |
c5aa993b JM |
14541 | case DW_ACCESS_public: |
14542 | break; | |
c906108c | 14543 | |
c5aa993b JM |
14544 | default: |
14545 | /* Unknown accessibility. Complain and treat it as public. */ | |
14546 | { | |
b98664d3 | 14547 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 14548 | field.accessibility); |
c5aa993b JM |
14549 | } |
14550 | break; | |
c906108c | 14551 | } |
be2daae6 | 14552 | if (i < fip->baseclasses.size ()) |
c906108c | 14553 | { |
be2daae6 | 14554 | switch (field.virtuality) |
c906108c | 14555 | { |
c5aa993b JM |
14556 | case DW_VIRTUALITY_virtual: |
14557 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14558 | if (cu->language == language_ada) |
a73c6dcd | 14559 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 14560 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 14561 | break; |
c906108c SS |
14562 | } |
14563 | } | |
c906108c SS |
14564 | } |
14565 | } | |
14566 | ||
7d27a96d TT |
14567 | /* Return true if this member function is a constructor, false |
14568 | otherwise. */ | |
14569 | ||
14570 | static int | |
14571 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14572 | { | |
14573 | const char *fieldname; | |
fe978cb0 | 14574 | const char *type_name; |
7d27a96d TT |
14575 | int len; |
14576 | ||
14577 | if (die->parent == NULL) | |
14578 | return 0; | |
14579 | ||
14580 | if (die->parent->tag != DW_TAG_structure_type | |
14581 | && die->parent->tag != DW_TAG_union_type | |
14582 | && die->parent->tag != DW_TAG_class_type) | |
14583 | return 0; | |
14584 | ||
14585 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14586 | type_name = dwarf2_name (die->parent, cu); |
14587 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14588 | return 0; |
14589 | ||
14590 | len = strlen (fieldname); | |
fe978cb0 PA |
14591 | return (strncmp (fieldname, type_name, len) == 0 |
14592 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14593 | } |
14594 | ||
e35000a7 TBA |
14595 | /* Check if the given VALUE is a recognized enum |
14596 | dwarf_defaulted_attribute constant according to DWARF5 spec, | |
14597 | Table 7.24. */ | |
14598 | ||
14599 | static bool | |
14600 | is_valid_DW_AT_defaulted (ULONGEST value) | |
14601 | { | |
14602 | switch (value) | |
14603 | { | |
14604 | case DW_DEFAULTED_no: | |
14605 | case DW_DEFAULTED_in_class: | |
14606 | case DW_DEFAULTED_out_of_class: | |
14607 | return true; | |
14608 | } | |
14609 | ||
3142e908 | 14610 | complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value)); |
e35000a7 TBA |
14611 | return false; |
14612 | } | |
14613 | ||
c906108c SS |
14614 | /* Add a member function to the proper fieldlist. */ |
14615 | ||
14616 | static void | |
107d2387 | 14617 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14618 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14619 | { |
518817b3 | 14620 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 14621 | struct attribute *attr; |
c906108c | 14622 | int i; |
be2daae6 | 14623 | struct fnfieldlist *flp = nullptr; |
c906108c | 14624 | struct fn_field *fnp; |
15d034d0 | 14625 | const char *fieldname; |
f792889a | 14626 | struct type *this_type; |
60d5a603 | 14627 | enum dwarf_access_attribute accessibility; |
c906108c | 14628 | |
b4ba55a1 | 14629 | if (cu->language == language_ada) |
a73c6dcd | 14630 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14631 | |
2df3850c | 14632 | /* Get name of member function. */ |
39cbfefa DJ |
14633 | fieldname = dwarf2_name (die, cu); |
14634 | if (fieldname == NULL) | |
2df3850c | 14635 | return; |
c906108c | 14636 | |
c906108c | 14637 | /* Look up member function name in fieldlist. */ |
be2daae6 | 14638 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14639 | { |
27bfe10e | 14640 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
14641 | { |
14642 | flp = &fip->fnfieldlists[i]; | |
14643 | break; | |
14644 | } | |
c906108c SS |
14645 | } |
14646 | ||
be2daae6 TT |
14647 | /* Create a new fnfieldlist if necessary. */ |
14648 | if (flp == nullptr) | |
c906108c | 14649 | { |
be2daae6 TT |
14650 | fip->fnfieldlists.emplace_back (); |
14651 | flp = &fip->fnfieldlists.back (); | |
c906108c | 14652 | flp->name = fieldname; |
be2daae6 | 14653 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
14654 | } |
14655 | ||
be2daae6 TT |
14656 | /* Create a new member function field and add it to the vector of |
14657 | fnfieldlists. */ | |
14658 | flp->fnfields.emplace_back (); | |
14659 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
14660 | |
14661 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14662 | if (cu->language == language_cplus) |
be2daae6 TT |
14663 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
14664 | die, cu); | |
3da10d80 KS |
14665 | else |
14666 | { | |
1d06ead6 | 14667 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
14668 | fnp->physname = physname ? physname : ""; |
14669 | } | |
14670 | ||
c906108c | 14671 | fnp->type = alloc_type (objfile); |
f792889a DJ |
14672 | this_type = read_type_die (die, cu); |
14673 | if (this_type && TYPE_CODE (this_type) == TYPE_CODE_FUNC) | |
c906108c | 14674 | { |
f792889a | 14675 | int nparams = TYPE_NFIELDS (this_type); |
c906108c | 14676 | |
f792889a | 14677 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
14678 | of the method itself (TYPE_CODE_METHOD). */ |
14679 | smash_to_method_type (fnp->type, type, | |
f792889a DJ |
14680 | TYPE_TARGET_TYPE (this_type), |
14681 | TYPE_FIELDS (this_type), | |
14682 | TYPE_NFIELDS (this_type), | |
14683 | TYPE_VARARGS (this_type)); | |
c906108c SS |
14684 | |
14685 | /* Handle static member functions. | |
c5aa993b | 14686 | Dwarf2 has no clean way to discern C++ static and non-static |
0963b4bd MS |
14687 | member functions. G++ helps GDB by marking the first |
14688 | parameter for non-static member functions (which is the this | |
14689 | pointer) as artificial. We obtain this information from | |
14690 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 14691 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
14692 | fnp->voffset = VOFFSET_STATIC; |
14693 | } | |
14694 | else | |
b98664d3 | 14695 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 14696 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
14697 | |
14698 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 14699 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 14700 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 14701 | |
3e43a32a MS |
14702 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
14703 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
14704 | |
14705 | /* Get accessibility. */ | |
e142c38c | 14706 | attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
435d3d88 | 14707 | if (attr != nullptr) |
aead7601 | 14708 | accessibility = (enum dwarf_access_attribute) DW_UNSND (attr); |
60d5a603 JK |
14709 | else |
14710 | accessibility = dwarf2_default_access_attribute (die, cu); | |
14711 | switch (accessibility) | |
c906108c | 14712 | { |
60d5a603 JK |
14713 | case DW_ACCESS_private: |
14714 | fnp->is_private = 1; | |
14715 | break; | |
14716 | case DW_ACCESS_protected: | |
14717 | fnp->is_protected = 1; | |
14718 | break; | |
c906108c SS |
14719 | } |
14720 | ||
b02dede2 | 14721 | /* Check for artificial methods. */ |
e142c38c | 14722 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
b02dede2 DJ |
14723 | if (attr && DW_UNSND (attr) != 0) |
14724 | fnp->is_artificial = 1; | |
14725 | ||
e35000a7 TBA |
14726 | /* Check for defaulted methods. */ |
14727 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
14728 | if (attr != nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr))) | |
14729 | fnp->defaulted = (enum dwarf_defaulted_attribute) DW_UNSND (attr); | |
14730 | ||
14731 | /* Check for deleted methods. */ | |
14732 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
14733 | if (attr != nullptr && DW_UNSND (attr) != 0) | |
14734 | fnp->is_deleted = 1; | |
14735 | ||
7d27a96d TT |
14736 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
14737 | ||
0d564a31 | 14738 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
14739 | function. For older versions of GCC, this is an offset in the |
14740 | appropriate virtual table, as specified by DW_AT_containing_type. | |
14741 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
14742 | to the object address. */ |
14743 | ||
e142c38c | 14744 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 14745 | if (attr != nullptr) |
8e19ed76 | 14746 | { |
4fc6c0d5 | 14747 | if (attr->form_is_block () && DW_BLOCK (attr)->size > 0) |
8e19ed76 | 14748 | { |
aec5aa8b TT |
14749 | if (DW_BLOCK (attr)->data[0] == DW_OP_constu) |
14750 | { | |
14751 | /* Old-style GCC. */ | |
14752 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu) + 2; | |
14753 | } | |
14754 | else if (DW_BLOCK (attr)->data[0] == DW_OP_deref | |
14755 | || (DW_BLOCK (attr)->size > 1 | |
14756 | && DW_BLOCK (attr)->data[0] == DW_OP_deref_size | |
14757 | && DW_BLOCK (attr)->data[1] == cu->header.addr_size)) | |
14758 | { | |
aec5aa8b TT |
14759 | fnp->voffset = decode_locdesc (DW_BLOCK (attr), cu); |
14760 | if ((fnp->voffset % cu->header.addr_size) != 0) | |
14761 | dwarf2_complex_location_expr_complaint (); | |
14762 | else | |
14763 | fnp->voffset /= cu->header.addr_size; | |
14764 | fnp->voffset += 2; | |
14765 | } | |
14766 | else | |
14767 | dwarf2_complex_location_expr_complaint (); | |
14768 | ||
14769 | if (!fnp->fcontext) | |
7e993ebf KS |
14770 | { |
14771 | /* If there is no `this' field and no DW_AT_containing_type, | |
14772 | we cannot actually find a base class context for the | |
14773 | vtable! */ | |
14774 | if (TYPE_NFIELDS (this_type) == 0 | |
14775 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) | |
14776 | { | |
b98664d3 | 14777 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
14778 | "function \"%s\" (offset %s)"), |
14779 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
14780 | } |
14781 | else | |
14782 | { | |
14783 | fnp->fcontext | |
14784 | = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type, 0)); | |
14785 | } | |
14786 | } | |
aec5aa8b | 14787 | } |
cd6c91b4 | 14788 | else if (attr->form_is_section_offset ()) |
8e19ed76 | 14789 | { |
4d3c2250 | 14790 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
14791 | } |
14792 | else | |
14793 | { | |
4d3c2250 KB |
14794 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
14795 | fieldname); | |
8e19ed76 | 14796 | } |
0d564a31 | 14797 | } |
d48cc9dd DJ |
14798 | else |
14799 | { | |
14800 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
14801 | if (attr && DW_UNSND (attr)) | |
14802 | { | |
14803 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 14804 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 14805 | "but the vtable offset is not specified"), |
9d8780f0 | 14806 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 14807 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
14808 | TYPE_CPLUS_DYNAMIC (type) = 1; |
14809 | } | |
14810 | } | |
c906108c SS |
14811 | } |
14812 | ||
14813 | /* Create the vector of member function fields, and attach it to the type. */ | |
14814 | ||
14815 | static void | |
fba45db2 | 14816 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14817 | struct dwarf2_cu *cu) |
c906108c | 14818 | { |
b4ba55a1 | 14819 | if (cu->language == language_ada) |
a73c6dcd | 14820 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 14821 | |
c906108c SS |
14822 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
14823 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
14824 | TYPE_ALLOC (type, |
14825 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 14826 | |
be2daae6 | 14827 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14828 | { |
be2daae6 | 14829 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 14830 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 14831 | |
be2daae6 TT |
14832 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
14833 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 14834 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
14835 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
14836 | ||
14837 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
14838 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
14839 | } |
14840 | ||
be2daae6 | 14841 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
14842 | } |
14843 | ||
1168df01 JB |
14844 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
14845 | language, zero otherwise. */ | |
14846 | static int | |
14847 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
14848 | { | |
14849 | static const char vptr[] = "_vptr"; | |
14850 | ||
9c37b5ae TT |
14851 | /* Look for the C++ form of the vtable. */ |
14852 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
14853 | return 1; |
14854 | ||
14855 | return 0; | |
14856 | } | |
14857 | ||
c0dd20ea | 14858 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
14859 | functions, with the ABI-specified layout. If TYPE describes |
14860 | such a structure, smash it into a member function type. | |
61049d3b DJ |
14861 | |
14862 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
14863 | This is GCC PR debug/28767. */ | |
c0dd20ea | 14864 | |
0b92b5bb TT |
14865 | static void |
14866 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 14867 | { |
09e2d7c7 | 14868 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
14869 | |
14870 | /* Check for a structure with no name and two children. */ | |
0b92b5bb TT |
14871 | if (TYPE_CODE (type) != TYPE_CODE_STRUCT || TYPE_NFIELDS (type) != 2) |
14872 | return; | |
c0dd20ea DJ |
14873 | |
14874 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
14875 | if (TYPE_FIELD_NAME (type, 0) == NULL |
14876 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
14877 | || TYPE_FIELD_NAME (type, 1) == NULL | |
14878 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
14879 | return; | |
c0dd20ea DJ |
14880 | |
14881 | /* Find the type of the method. */ | |
0b92b5bb | 14882 | pfn_type = TYPE_FIELD_TYPE (type, 0); |
c0dd20ea DJ |
14883 | if (pfn_type == NULL |
14884 | || TYPE_CODE (pfn_type) != TYPE_CODE_PTR | |
14885 | || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC) | |
0b92b5bb | 14886 | return; |
c0dd20ea DJ |
14887 | |
14888 | /* Look for the "this" argument. */ | |
14889 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
14890 | if (TYPE_NFIELDS (pfn_type) == 0 | |
0b92b5bb | 14891 | /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */ |
c0dd20ea | 14892 | || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR) |
0b92b5bb | 14893 | return; |
c0dd20ea | 14894 | |
09e2d7c7 | 14895 | self_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0)); |
0b92b5bb | 14896 | new_type = alloc_type (objfile); |
09e2d7c7 | 14897 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
c0dd20ea DJ |
14898 | TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type), |
14899 | TYPE_VARARGS (pfn_type)); | |
0b92b5bb | 14900 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 14901 | } |
1168df01 | 14902 | |
2b4424c3 TT |
14903 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
14904 | appropriate error checking and issuing complaints if there is a | |
14905 | problem. */ | |
14906 | ||
14907 | static ULONGEST | |
14908 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
14909 | { | |
14910 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
14911 | ||
14912 | if (attr == nullptr) | |
14913 | return 0; | |
14914 | ||
cd6c91b4 | 14915 | if (!attr->form_is_constant ()) |
2b4424c3 | 14916 | { |
b98664d3 | 14917 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
14918 | " - DIE at %s [in module %s]"), |
14919 | sect_offset_str (die->sect_off), | |
14920 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14921 | return 0; | |
14922 | } | |
14923 | ||
14924 | ULONGEST align; | |
14925 | if (attr->form == DW_FORM_sdata) | |
14926 | { | |
14927 | LONGEST val = DW_SND (attr); | |
14928 | if (val < 0) | |
14929 | { | |
b98664d3 | 14930 | complaint (_("DW_AT_alignment value must not be negative" |
2b4424c3 TT |
14931 | " - DIE at %s [in module %s]"), |
14932 | sect_offset_str (die->sect_off), | |
14933 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14934 | return 0; | |
14935 | } | |
14936 | align = val; | |
14937 | } | |
14938 | else | |
14939 | align = DW_UNSND (attr); | |
14940 | ||
14941 | if (align == 0) | |
14942 | { | |
b98664d3 | 14943 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
14944 | " - DIE at %s [in module %s]"), |
14945 | sect_offset_str (die->sect_off), | |
14946 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14947 | return 0; | |
14948 | } | |
14949 | if ((align & (align - 1)) != 0) | |
14950 | { | |
b98664d3 | 14951 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
14952 | " - DIE at %s [in module %s]"), |
14953 | sect_offset_str (die->sect_off), | |
14954 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14955 | return 0; | |
14956 | } | |
14957 | ||
14958 | return align; | |
14959 | } | |
14960 | ||
14961 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
14962 | the alignment for TYPE. */ | |
14963 | ||
14964 | static void | |
14965 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
14966 | struct type *type) | |
14967 | { | |
14968 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 14969 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
14970 | " - DIE at %s [in module %s]"), |
14971 | sect_offset_str (die->sect_off), | |
14972 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
14973 | } | |
685b1105 | 14974 | |
e35000a7 TBA |
14975 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
14976 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
14977 | ||
14978 | static bool | |
14979 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
14980 | { | |
14981 | switch (value) | |
14982 | { | |
14983 | case DW_CC_normal: | |
14984 | case DW_CC_pass_by_reference: | |
14985 | case DW_CC_pass_by_value: | |
14986 | return true; | |
14987 | ||
14988 | default: | |
14989 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 14990 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
14991 | return false; |
14992 | } | |
14993 | } | |
14994 | ||
d0922fcf TBA |
14995 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
14996 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
14997 | also according to GNU-specific values (see include/dwarf2.h). */ | |
14998 | ||
14999 | static bool | |
15000 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
15001 | { | |
15002 | switch (value) | |
15003 | { | |
15004 | case DW_CC_normal: | |
15005 | case DW_CC_program: | |
15006 | case DW_CC_nocall: | |
15007 | return true; | |
15008 | ||
15009 | case DW_CC_GNU_renesas_sh: | |
15010 | case DW_CC_GNU_borland_fastcall_i386: | |
15011 | case DW_CC_GDB_IBM_OpenCL: | |
15012 | return true; | |
15013 | ||
15014 | default: | |
15015 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15016 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15017 | return false; |
15018 | } | |
15019 | } | |
15020 | ||
c906108c | 15021 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15022 | (definition) to create a type for the structure or union. Fill in |
15023 | the type's name and general properties; the members will not be | |
83655187 DE |
15024 | processed until process_structure_scope. A symbol table entry for |
15025 | the type will also not be done until process_structure_scope (assuming | |
15026 | the type has a name). | |
c906108c | 15027 | |
c767944b DJ |
15028 | NOTE: we need to call these functions regardless of whether or not the |
15029 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15030 | structure or union. This gets the type entered into our set of |
83655187 | 15031 | user defined types. */ |
c906108c | 15032 | |
f792889a | 15033 | static struct type * |
134d01f1 | 15034 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15035 | { |
518817b3 | 15036 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
15037 | struct type *type; |
15038 | struct attribute *attr; | |
15d034d0 | 15039 | const char *name; |
c906108c | 15040 | |
348e048f DE |
15041 | /* If the definition of this type lives in .debug_types, read that type. |
15042 | Don't follow DW_AT_specification though, that will take us back up | |
15043 | the chain and we want to go down. */ | |
45e58e77 | 15044 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15045 | if (attr != nullptr) |
348e048f | 15046 | { |
ac9ec31b | 15047 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15048 | |
ac9ec31b | 15049 | /* The type's CU may not be the same as CU. |
02142a6c | 15050 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15051 | return set_die_type (die, type, cu); |
15052 | } | |
15053 | ||
c0dd20ea | 15054 | type = alloc_type (objfile); |
c906108c | 15055 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15056 | |
39cbfefa DJ |
15057 | name = dwarf2_name (die, cu); |
15058 | if (name != NULL) | |
c906108c | 15059 | { |
987504bb | 15060 | if (cu->language == language_cplus |
c44af4eb TT |
15061 | || cu->language == language_d |
15062 | || cu->language == language_rust) | |
63d06c5c | 15063 | { |
15d034d0 | 15064 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15065 | |
15066 | /* dwarf2_full_name might have already finished building the DIE's | |
15067 | type. If so, there is no need to continue. */ | |
15068 | if (get_die_type (die, cu) != NULL) | |
15069 | return get_die_type (die, cu); | |
15070 | ||
e86ca25f | 15071 | TYPE_NAME (type) = full_name; |
63d06c5c DC |
15072 | } |
15073 | else | |
15074 | { | |
d8151005 DJ |
15075 | /* The name is already allocated along with this objfile, so |
15076 | we don't need to duplicate it for the type. */ | |
e86ca25f | 15077 | TYPE_NAME (type) = name; |
63d06c5c | 15078 | } |
c906108c SS |
15079 | } |
15080 | ||
15081 | if (die->tag == DW_TAG_structure_type) | |
15082 | { | |
15083 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
15084 | } | |
15085 | else if (die->tag == DW_TAG_union_type) | |
15086 | { | |
15087 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15088 | } | |
2ddeaf8a TT |
15089 | else if (die->tag == DW_TAG_variant_part) |
15090 | { | |
15091 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
15092 | TYPE_FLAG_DISCRIMINATED_UNION (type) = 1; | |
15093 | } | |
c906108c SS |
15094 | else |
15095 | { | |
4753d33b | 15096 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
c906108c SS |
15097 | } |
15098 | ||
0cc2414c TT |
15099 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
15100 | TYPE_DECLARED_CLASS (type) = 1; | |
15101 | ||
e35000a7 TBA |
15102 | /* Store the calling convention in the type if it's available in |
15103 | the die. Otherwise the calling convention remains set to | |
15104 | the default value DW_CC_normal. */ | |
15105 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15106 | if (attr != nullptr | |
15107 | && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr))) | |
15108 | { | |
15109 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15110 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
15111 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
15112 | } | |
15113 | ||
e142c38c | 15114 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15115 | if (attr != nullptr) |
c906108c | 15116 | { |
cd6c91b4 | 15117 | if (attr->form_is_constant ()) |
155bfbd3 JB |
15118 | TYPE_LENGTH (type) = DW_UNSND (attr); |
15119 | else | |
15120 | { | |
15121 | /* For the moment, dynamic type sizes are not supported | |
15122 | by GDB's struct type. The actual size is determined | |
15123 | on-demand when resolving the type of a given object, | |
15124 | so set the type's length to zero for now. Otherwise, | |
15125 | we record an expression as the length, and that expression | |
15126 | could lead to a very large value, which could eventually | |
15127 | lead to us trying to allocate that much memory when creating | |
15128 | a value of that type. */ | |
15129 | TYPE_LENGTH (type) = 0; | |
15130 | } | |
c906108c SS |
15131 | } |
15132 | else | |
15133 | { | |
15134 | TYPE_LENGTH (type) = 0; | |
15135 | } | |
15136 | ||
2b4424c3 TT |
15137 | maybe_set_alignment (cu, die, type); |
15138 | ||
5230b05a | 15139 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15140 | { |
5230b05a WT |
15141 | /* ICC<14 does not output the required DW_AT_declaration on |
15142 | incomplete types, but gives them a size of zero. */ | |
422b1cb0 | 15143 | TYPE_STUB (type) = 1; |
685b1105 JK |
15144 | } |
15145 | else | |
15146 | TYPE_STUB_SUPPORTED (type) = 1; | |
15147 | ||
dc718098 | 15148 | if (die_is_declaration (die, cu)) |
876cecd0 | 15149 | TYPE_STUB (type) = 1; |
a6c727b2 DJ |
15150 | else if (attr == NULL && die->child == NULL |
15151 | && producer_is_realview (cu->producer)) | |
15152 | /* RealView does not output the required DW_AT_declaration | |
15153 | on incomplete types. */ | |
15154 | TYPE_STUB (type) = 1; | |
dc718098 | 15155 | |
c906108c SS |
15156 | /* We need to add the type field to the die immediately so we don't |
15157 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15158 | type within the structure itself. */ |
1c379e20 | 15159 | set_die_type (die, type, cu); |
c906108c | 15160 | |
7e314c57 JK |
15161 | /* set_die_type should be already done. */ |
15162 | set_descriptive_type (type, die, cu); | |
15163 | ||
c767944b DJ |
15164 | return type; |
15165 | } | |
15166 | ||
2ddeaf8a TT |
15167 | /* A helper for process_structure_scope that handles a single member |
15168 | DIE. */ | |
15169 | ||
15170 | static void | |
15171 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15172 | struct field_info *fi, | |
15173 | std::vector<struct symbol *> *template_args, | |
15174 | struct dwarf2_cu *cu) | |
15175 | { | |
15176 | if (child_die->tag == DW_TAG_member | |
15177 | || child_die->tag == DW_TAG_variable | |
15178 | || child_die->tag == DW_TAG_variant_part) | |
15179 | { | |
15180 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15181 | should be a DW_TAG_member that is a declaration, but | |
15182 | all versions of G++ as of this writing (so through at | |
15183 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15184 | tags for them instead. */ | |
15185 | dwarf2_add_field (fi, child_die, cu); | |
15186 | } | |
15187 | else if (child_die->tag == DW_TAG_subprogram) | |
15188 | { | |
15189 | /* Rust doesn't have member functions in the C++ sense. | |
15190 | However, it does emit ordinary functions as children | |
15191 | of a struct DIE. */ | |
15192 | if (cu->language == language_rust) | |
15193 | read_func_scope (child_die, cu); | |
15194 | else | |
15195 | { | |
15196 | /* C++ member function. */ | |
15197 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15198 | } | |
15199 | } | |
15200 | else if (child_die->tag == DW_TAG_inheritance) | |
15201 | { | |
15202 | /* C++ base class field. */ | |
15203 | dwarf2_add_field (fi, child_die, cu); | |
15204 | } | |
15205 | else if (type_can_define_types (child_die)) | |
15206 | dwarf2_add_type_defn (fi, child_die, cu); | |
15207 | else if (child_die->tag == DW_TAG_template_type_param | |
15208 | || child_die->tag == DW_TAG_template_value_param) | |
15209 | { | |
15210 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15211 | ||
15212 | if (arg != NULL) | |
15213 | template_args->push_back (arg); | |
15214 | } | |
15215 | else if (child_die->tag == DW_TAG_variant) | |
15216 | { | |
15217 | /* In a variant we want to get the discriminant and also add a | |
15218 | field for our sole member child. */ | |
15219 | struct attribute *discr = dwarf2_attr (child_die, DW_AT_discr_value, cu); | |
15220 | ||
bde09ab7 | 15221 | for (die_info *variant_child = child_die->child; |
2ddeaf8a TT |
15222 | variant_child != NULL; |
15223 | variant_child = sibling_die (variant_child)) | |
15224 | { | |
15225 | if (variant_child->tag == DW_TAG_member) | |
15226 | { | |
15227 | handle_struct_member_die (variant_child, type, fi, | |
15228 | template_args, cu); | |
15229 | /* Only handle the one. */ | |
15230 | break; | |
15231 | } | |
15232 | } | |
15233 | ||
15234 | /* We don't handle this but we might as well report it if we see | |
15235 | it. */ | |
15236 | if (dwarf2_attr (child_die, DW_AT_discr_list, cu) != nullptr) | |
b98664d3 | 15237 | complaint (_("DW_AT_discr_list is not supported yet" |
2ddeaf8a TT |
15238 | " - DIE at %s [in module %s]"), |
15239 | sect_offset_str (child_die->sect_off), | |
15240 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15241 | ||
15242 | /* The first field was just added, so we can stash the | |
15243 | discriminant there. */ | |
be2daae6 | 15244 | gdb_assert (!fi->fields.empty ()); |
2ddeaf8a | 15245 | if (discr == NULL) |
be2daae6 | 15246 | fi->fields.back ().variant.default_branch = true; |
2ddeaf8a | 15247 | else |
be2daae6 | 15248 | fi->fields.back ().variant.discriminant_value = DW_UNSND (discr); |
2ddeaf8a TT |
15249 | } |
15250 | } | |
15251 | ||
c767944b DJ |
15252 | /* Finish creating a structure or union type, including filling in |
15253 | its members and creating a symbol for it. */ | |
15254 | ||
15255 | static void | |
15256 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15257 | { | |
518817b3 | 15258 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
ca040673 | 15259 | struct die_info *child_die; |
c767944b DJ |
15260 | struct type *type; |
15261 | ||
15262 | type = get_die_type (die, cu); | |
15263 | if (type == NULL) | |
15264 | type = read_structure_type (die, cu); | |
15265 | ||
2ddeaf8a TT |
15266 | /* When reading a DW_TAG_variant_part, we need to notice when we |
15267 | read the discriminant member, so we can record it later in the | |
15268 | discriminant_info. */ | |
15269 | bool is_variant_part = TYPE_FLAG_DISCRIMINATED_UNION (type); | |
feee869b | 15270 | sect_offset discr_offset {}; |
3e1d3d8c | 15271 | bool has_template_parameters = false; |
2ddeaf8a TT |
15272 | |
15273 | if (is_variant_part) | |
15274 | { | |
15275 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15276 | if (discr == NULL) | |
15277 | { | |
15278 | /* Maybe it's a univariant form, an extension we support. | |
15279 | In this case arrange not to check the offset. */ | |
15280 | is_variant_part = false; | |
15281 | } | |
cd6c91b4 | 15282 | else if (discr->form_is_ref ()) |
2ddeaf8a TT |
15283 | { |
15284 | struct dwarf2_cu *target_cu = cu; | |
15285 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15286 | ||
15287 | discr_offset = target_die->sect_off; | |
15288 | } | |
15289 | else | |
15290 | { | |
b98664d3 | 15291 | complaint (_("DW_AT_discr does not have DIE reference form" |
2ddeaf8a TT |
15292 | " - DIE at %s [in module %s]"), |
15293 | sect_offset_str (die->sect_off), | |
15294 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
15295 | is_variant_part = false; | |
15296 | } | |
15297 | } | |
15298 | ||
e142c38c | 15299 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15300 | { |
15301 | struct field_info fi; | |
2f4732b0 | 15302 | std::vector<struct symbol *> template_args; |
c906108c | 15303 | |
639d11d3 | 15304 | child_die = die->child; |
c906108c SS |
15305 | |
15306 | while (child_die && child_die->tag) | |
15307 | { | |
2ddeaf8a | 15308 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
34eaf542 | 15309 | |
2ddeaf8a | 15310 | if (is_variant_part && discr_offset == child_die->sect_off) |
be2daae6 | 15311 | fi.fields.back ().variant.is_discriminant = true; |
34eaf542 | 15312 | |
c906108c SS |
15313 | child_die = sibling_die (child_die); |
15314 | } | |
15315 | ||
34eaf542 | 15316 | /* Attach template arguments to type. */ |
2f4732b0 | 15317 | if (!template_args.empty ()) |
34eaf542 | 15318 | { |
3e1d3d8c | 15319 | has_template_parameters = true; |
34eaf542 | 15320 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 15321 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15322 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15323 | = XOBNEWVEC (&objfile->objfile_obstack, |
15324 | struct symbol *, | |
15325 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15326 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15327 | template_args.data (), |
34eaf542 TT |
15328 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15329 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15330 | } |
15331 | ||
c906108c | 15332 | /* Attach fields and member functions to the type. */ |
317f7127 | 15333 | if (fi.nfields () > 0) |
e7c27a73 | 15334 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15335 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15336 | { |
e7c27a73 | 15337 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15338 | |
c5aa993b | 15339 | /* Get the type which refers to the base class (possibly this |
c906108c | 15340 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15341 | class from the DW_AT_containing_type attribute. This use of |
15342 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15343 | |
e142c38c | 15344 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15345 | { |
e7c27a73 | 15346 | struct type *t = die_containing_type (die, cu); |
c906108c | 15347 | |
ae6ae975 | 15348 | set_type_vptr_basetype (type, t); |
c906108c SS |
15349 | if (type == t) |
15350 | { | |
c906108c SS |
15351 | int i; |
15352 | ||
15353 | /* Our own class provides vtbl ptr. */ | |
15354 | for (i = TYPE_NFIELDS (t) - 1; | |
15355 | i >= TYPE_N_BASECLASSES (t); | |
15356 | --i) | |
15357 | { | |
0d5cff50 | 15358 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15359 | |
1168df01 | 15360 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15361 | { |
ae6ae975 | 15362 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15363 | break; |
15364 | } | |
15365 | } | |
15366 | ||
15367 | /* Complain if virtual function table field not found. */ | |
15368 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15369 | complaint (_("virtual function table pointer " |
3e43a32a | 15370 | "not found when defining class '%s'"), |
e86ca25f | 15371 | TYPE_NAME (type) ? TYPE_NAME (type) : ""); |
c906108c SS |
15372 | } |
15373 | else | |
15374 | { | |
ae6ae975 | 15375 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15376 | } |
15377 | } | |
f6235d4c | 15378 | else if (cu->producer |
61012eef | 15379 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15380 | { |
15381 | /* The IBM XLC compiler does not provide direct indication | |
15382 | of the containing type, but the vtable pointer is | |
15383 | always named __vfp. */ | |
15384 | ||
15385 | int i; | |
15386 | ||
15387 | for (i = TYPE_NFIELDS (type) - 1; | |
15388 | i >= TYPE_N_BASECLASSES (type); | |
15389 | --i) | |
15390 | { | |
15391 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15392 | { | |
ae6ae975 DE |
15393 | set_type_vptr_fieldno (type, i); |
15394 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15395 | break; |
15396 | } | |
15397 | } | |
15398 | } | |
c906108c | 15399 | } |
98751a41 JK |
15400 | |
15401 | /* Copy fi.typedef_field_list linked list elements content into the | |
15402 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15403 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15404 | { |
be2daae6 | 15405 | int count = fi.typedef_field_list.size (); |
98751a41 | 15406 | |
a0d7a4ff | 15407 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15408 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15409 | = ((struct decl_field *) |
be2daae6 TT |
15410 | TYPE_ALLOC (type, |
15411 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
15412 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 15413 | |
be2daae6 TT |
15414 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
15415 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 15416 | } |
c767944b | 15417 | |
883fd55a KS |
15418 | /* Copy fi.nested_types_list linked list elements content into the |
15419 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 15420 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 15421 | { |
be2daae6 | 15422 | int count = fi.nested_types_list.size (); |
883fd55a KS |
15423 | |
15424 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15425 | TYPE_NESTED_TYPES_ARRAY (type) | |
15426 | = ((struct decl_field *) | |
be2daae6 TT |
15427 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
15428 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 15429 | |
be2daae6 TT |
15430 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
15431 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 15432 | } |
c906108c | 15433 | } |
63d06c5c | 15434 | |
bb5ed363 | 15435 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
15436 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
15437 | cu->rust_unions.push_back (type); | |
0b92b5bb | 15438 | |
90aeadfc DC |
15439 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
15440 | snapshots) has been known to create a die giving a declaration | |
15441 | for a class that has, as a child, a die giving a definition for a | |
15442 | nested class. So we have to process our children even if the | |
15443 | current die is a declaration. Normally, of course, a declaration | |
15444 | won't have any children at all. */ | |
134d01f1 | 15445 | |
ca040673 DE |
15446 | child_die = die->child; |
15447 | ||
90aeadfc DC |
15448 | while (child_die != NULL && child_die->tag) |
15449 | { | |
15450 | if (child_die->tag == DW_TAG_member | |
15451 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
15452 | || child_die->tag == DW_TAG_inheritance |
15453 | || child_die->tag == DW_TAG_template_value_param | |
15454 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 15455 | { |
90aeadfc | 15456 | /* Do nothing. */ |
134d01f1 | 15457 | } |
90aeadfc DC |
15458 | else |
15459 | process_die (child_die, cu); | |
134d01f1 | 15460 | |
90aeadfc | 15461 | child_die = sibling_die (child_die); |
134d01f1 DJ |
15462 | } |
15463 | ||
fa4028e9 JB |
15464 | /* Do not consider external references. According to the DWARF standard, |
15465 | these DIEs are identified by the fact that they have no byte_size | |
15466 | attribute, and a declaration attribute. */ | |
15467 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
15468 | || !die_is_declaration (die, cu)) | |
3e1d3d8c TT |
15469 | { |
15470 | struct symbol *sym = new_symbol (die, type, cu); | |
15471 | ||
15472 | if (has_template_parameters) | |
15473 | { | |
a776957c TT |
15474 | struct symtab *symtab; |
15475 | if (sym != nullptr) | |
15476 | symtab = symbol_symtab (sym); | |
15477 | else if (cu->line_header != nullptr) | |
15478 | { | |
15479 | /* Any related symtab will do. */ | |
15480 | symtab | |
7ba99d21 | 15481 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
15482 | } |
15483 | else | |
15484 | { | |
15485 | symtab = nullptr; | |
15486 | complaint (_("could not find suitable " | |
15487 | "symtab for template parameter" | |
15488 | " - DIE at %s [in module %s]"), | |
15489 | sect_offset_str (die->sect_off), | |
15490 | objfile_name (objfile)); | |
15491 | } | |
15492 | ||
15493 | if (symtab != nullptr) | |
15494 | { | |
15495 | /* Make sure that the symtab is set on the new symbols. | |
15496 | Even though they don't appear in this symtab directly, | |
15497 | other parts of gdb assume that symbols do, and this is | |
15498 | reasonably true. */ | |
15499 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
15500 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
15501 | } | |
3e1d3d8c TT |
15502 | } |
15503 | } | |
134d01f1 DJ |
15504 | } |
15505 | ||
55426c9d JB |
15506 | /* Assuming DIE is an enumeration type, and TYPE is its associated type, |
15507 | update TYPE using some information only available in DIE's children. */ | |
15508 | ||
15509 | static void | |
15510 | update_enumeration_type_from_children (struct die_info *die, | |
15511 | struct type *type, | |
15512 | struct dwarf2_cu *cu) | |
15513 | { | |
60f7655a | 15514 | struct die_info *child_die; |
55426c9d JB |
15515 | int unsigned_enum = 1; |
15516 | int flag_enum = 1; | |
55426c9d | 15517 | |
8268c778 | 15518 | auto_obstack obstack; |
55426c9d | 15519 | |
60f7655a DE |
15520 | for (child_die = die->child; |
15521 | child_die != NULL && child_die->tag; | |
15522 | child_die = sibling_die (child_die)) | |
55426c9d JB |
15523 | { |
15524 | struct attribute *attr; | |
15525 | LONGEST value; | |
15526 | const gdb_byte *bytes; | |
15527 | struct dwarf2_locexpr_baton *baton; | |
15528 | const char *name; | |
60f7655a | 15529 | |
55426c9d JB |
15530 | if (child_die->tag != DW_TAG_enumerator) |
15531 | continue; | |
15532 | ||
15533 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
15534 | if (attr == NULL) | |
15535 | continue; | |
15536 | ||
15537 | name = dwarf2_name (child_die, cu); | |
15538 | if (name == NULL) | |
15539 | name = "<anonymous enumerator>"; | |
15540 | ||
15541 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
15542 | &value, &bytes, &baton); | |
15543 | if (value < 0) | |
15544 | { | |
15545 | unsigned_enum = 0; | |
15546 | flag_enum = 0; | |
15547 | } | |
55426c9d | 15548 | else |
edd45eb0 SM |
15549 | { |
15550 | if (count_one_bits_ll (value) >= 2) | |
15551 | flag_enum = 0; | |
edd45eb0 | 15552 | } |
55426c9d JB |
15553 | |
15554 | /* If we already know that the enum type is neither unsigned, nor | |
15555 | a flag type, no need to look at the rest of the enumerates. */ | |
15556 | if (!unsigned_enum && !flag_enum) | |
15557 | break; | |
55426c9d JB |
15558 | } |
15559 | ||
15560 | if (unsigned_enum) | |
15561 | TYPE_UNSIGNED (type) = 1; | |
15562 | if (flag_enum) | |
15563 | TYPE_FLAG_ENUM (type) = 1; | |
55426c9d JB |
15564 | } |
15565 | ||
134d01f1 DJ |
15566 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
15567 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 15568 | |
f792889a | 15569 | static struct type * |
134d01f1 | 15570 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15571 | { |
518817b3 | 15572 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15573 | struct type *type; |
c906108c | 15574 | struct attribute *attr; |
0114d602 | 15575 | const char *name; |
134d01f1 | 15576 | |
348e048f DE |
15577 | /* If the definition of this type lives in .debug_types, read that type. |
15578 | Don't follow DW_AT_specification though, that will take us back up | |
15579 | the chain and we want to go down. */ | |
45e58e77 | 15580 | attr = dwarf2_attr_no_follow (die, DW_AT_signature); |
435d3d88 | 15581 | if (attr != nullptr) |
348e048f | 15582 | { |
ac9ec31b | 15583 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15584 | |
ac9ec31b | 15585 | /* The type's CU may not be the same as CU. |
02142a6c | 15586 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15587 | return set_die_type (die, type, cu); |
15588 | } | |
15589 | ||
c906108c SS |
15590 | type = alloc_type (objfile); |
15591 | ||
15592 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
94af9270 | 15593 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 15594 | if (name != NULL) |
e86ca25f | 15595 | TYPE_NAME (type) = name; |
c906108c | 15596 | |
0626fc76 TT |
15597 | attr = dwarf2_attr (die, DW_AT_type, cu); |
15598 | if (attr != NULL) | |
15599 | { | |
15600 | struct type *underlying_type = die_type (die, cu); | |
15601 | ||
15602 | TYPE_TARGET_TYPE (type) = underlying_type; | |
15603 | } | |
15604 | ||
e142c38c | 15605 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15606 | if (attr != nullptr) |
c906108c SS |
15607 | { |
15608 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15609 | } | |
15610 | else | |
15611 | { | |
15612 | TYPE_LENGTH (type) = 0; | |
15613 | } | |
15614 | ||
2b4424c3 TT |
15615 | maybe_set_alignment (cu, die, type); |
15616 | ||
137033e9 JB |
15617 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
15618 | declared as private in the package spec, and then defined only | |
15619 | inside the package body. Such types are known as Taft Amendment | |
15620 | Types. When another package uses such a type, an incomplete DIE | |
15621 | may be generated by the compiler. */ | |
02eb380e | 15622 | if (die_is_declaration (die, cu)) |
876cecd0 | 15623 | TYPE_STUB (type) = 1; |
02eb380e | 15624 | |
0626fc76 TT |
15625 | /* Finish the creation of this type by using the enum's children. |
15626 | We must call this even when the underlying type has been provided | |
15627 | so that we can determine if we're looking at a "flag" enum. */ | |
55426c9d JB |
15628 | update_enumeration_type_from_children (die, type, cu); |
15629 | ||
0626fc76 TT |
15630 | /* If this type has an underlying type that is not a stub, then we |
15631 | may use its attributes. We always use the "unsigned" attribute | |
15632 | in this situation, because ordinarily we guess whether the type | |
15633 | is unsigned -- but the guess can be wrong and the underlying type | |
15634 | can tell us the reality. However, we defer to a local size | |
15635 | attribute if one exists, because this lets the compiler override | |
15636 | the underlying type if needed. */ | |
15637 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_STUB (TYPE_TARGET_TYPE (type))) | |
15638 | { | |
15639 | TYPE_UNSIGNED (type) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)); | |
15640 | if (TYPE_LENGTH (type) == 0) | |
15641 | TYPE_LENGTH (type) = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); | |
2b4424c3 TT |
15642 | if (TYPE_RAW_ALIGN (type) == 0 |
15643 | && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type)) != 0) | |
15644 | set_type_align (type, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type))); | |
0626fc76 TT |
15645 | } |
15646 | ||
3d567982 TT |
15647 | TYPE_DECLARED_CLASS (type) = dwarf2_flag_true_p (die, DW_AT_enum_class, cu); |
15648 | ||
f792889a | 15649 | return set_die_type (die, type, cu); |
134d01f1 DJ |
15650 | } |
15651 | ||
15652 | /* Given a pointer to a die which begins an enumeration, process all | |
15653 | the dies that define the members of the enumeration, and create the | |
15654 | symbol for the enumeration type. | |
15655 | ||
15656 | NOTE: We reverse the order of the element list. */ | |
15657 | ||
15658 | static void | |
15659 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15660 | { | |
f792889a | 15661 | struct type *this_type; |
134d01f1 | 15662 | |
f792889a DJ |
15663 | this_type = get_die_type (die, cu); |
15664 | if (this_type == NULL) | |
15665 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 15666 | |
639d11d3 | 15667 | if (die->child != NULL) |
c906108c | 15668 | { |
9dc481d3 DE |
15669 | struct die_info *child_die; |
15670 | struct symbol *sym; | |
43816ebc | 15671 | std::vector<struct field> fields; |
15d034d0 | 15672 | const char *name; |
9dc481d3 | 15673 | |
639d11d3 | 15674 | child_die = die->child; |
c906108c SS |
15675 | while (child_die && child_die->tag) |
15676 | { | |
15677 | if (child_die->tag != DW_TAG_enumerator) | |
15678 | { | |
e7c27a73 | 15679 | process_die (child_die, cu); |
c906108c SS |
15680 | } |
15681 | else | |
15682 | { | |
39cbfefa DJ |
15683 | name = dwarf2_name (child_die, cu); |
15684 | if (name) | |
c906108c | 15685 | { |
f792889a | 15686 | sym = new_symbol (child_die, this_type, cu); |
c906108c | 15687 | |
43816ebc TT |
15688 | fields.emplace_back (); |
15689 | struct field &field = fields.back (); | |
c906108c | 15690 | |
43816ebc TT |
15691 | FIELD_NAME (field) = sym->linkage_name (); |
15692 | FIELD_TYPE (field) = NULL; | |
15693 | SET_FIELD_ENUMVAL (field, SYMBOL_VALUE (sym)); | |
15694 | FIELD_BITSIZE (field) = 0; | |
c906108c SS |
15695 | } |
15696 | } | |
15697 | ||
15698 | child_die = sibling_die (child_die); | |
15699 | } | |
15700 | ||
43816ebc | 15701 | if (!fields.empty ()) |
c906108c | 15702 | { |
43816ebc | 15703 | TYPE_NFIELDS (this_type) = fields.size (); |
f792889a | 15704 | TYPE_FIELDS (this_type) = (struct field *) |
43816ebc TT |
15705 | TYPE_ALLOC (this_type, sizeof (struct field) * fields.size ()); |
15706 | memcpy (TYPE_FIELDS (this_type), fields.data (), | |
15707 | sizeof (struct field) * fields.size ()); | |
c906108c | 15708 | } |
c906108c | 15709 | } |
134d01f1 | 15710 | |
6c83ed52 TT |
15711 | /* If we are reading an enum from a .debug_types unit, and the enum |
15712 | is a declaration, and the enum is not the signatured type in the | |
15713 | unit, then we do not want to add a symbol for it. Adding a | |
15714 | symbol would in some cases obscure the true definition of the | |
15715 | enum, giving users an incomplete type when the definition is | |
15716 | actually available. Note that we do not want to do this for all | |
15717 | enums which are just declarations, because C++0x allows forward | |
15718 | enum declarations. */ | |
3019eac3 | 15719 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
15720 | && die_is_declaration (die, cu)) |
15721 | { | |
52dc124a | 15722 | struct signatured_type *sig_type; |
6c83ed52 | 15723 | |
c0f78cd4 | 15724 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
15725 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
15726 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
15727 | return; |
15728 | } | |
15729 | ||
f792889a | 15730 | new_symbol (die, this_type, cu); |
c906108c SS |
15731 | } |
15732 | ||
15733 | /* Extract all information from a DW_TAG_array_type DIE and put it in | |
15734 | the DIE's type field. For now, this only handles one dimensional | |
15735 | arrays. */ | |
15736 | ||
f792889a | 15737 | static struct type * |
e7c27a73 | 15738 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15739 | { |
518817b3 | 15740 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 15741 | struct die_info *child_die; |
7e314c57 | 15742 | struct type *type; |
c906108c | 15743 | struct type *element_type, *range_type, *index_type; |
c906108c | 15744 | struct attribute *attr; |
15d034d0 | 15745 | const char *name; |
a405673c | 15746 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 15747 | unsigned int bit_stride = 0; |
c906108c | 15748 | |
e7c27a73 | 15749 | element_type = die_type (die, cu); |
c906108c | 15750 | |
7e314c57 JK |
15751 | /* The die_type call above may have already set the type for this DIE. */ |
15752 | type = get_die_type (die, cu); | |
15753 | if (type) | |
15754 | return type; | |
15755 | ||
dc53a7ad JB |
15756 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
15757 | if (attr != NULL) | |
a405673c JB |
15758 | { |
15759 | int stride_ok; | |
09ba997f | 15760 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
a405673c JB |
15761 | |
15762 | byte_stride_prop | |
15763 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
15764 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
15765 | prop_type); | |
a405673c JB |
15766 | if (!stride_ok) |
15767 | { | |
b98664d3 | 15768 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
15769 | " - DIE at %s [in module %s]"), |
15770 | sect_offset_str (die->sect_off), | |
518817b3 | 15771 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a405673c JB |
15772 | /* Ignore this attribute. We will likely not be able to print |
15773 | arrays of this type correctly, but there is little we can do | |
15774 | to help if we cannot read the attribute's value. */ | |
15775 | byte_stride_prop = NULL; | |
15776 | } | |
15777 | } | |
dc53a7ad JB |
15778 | |
15779 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
15780 | if (attr != NULL) | |
15781 | bit_stride = DW_UNSND (attr); | |
15782 | ||
c906108c SS |
15783 | /* Irix 6.2 native cc creates array types without children for |
15784 | arrays with unspecified length. */ | |
639d11d3 | 15785 | if (die->child == NULL) |
c906108c | 15786 | { |
46bf5051 | 15787 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 15788 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 15789 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 15790 | byte_stride_prop, bit_stride); |
f792889a | 15791 | return set_die_type (die, type, cu); |
c906108c SS |
15792 | } |
15793 | ||
791afaa2 | 15794 | std::vector<struct type *> range_types; |
639d11d3 | 15795 | child_die = die->child; |
c906108c SS |
15796 | while (child_die && child_die->tag) |
15797 | { | |
15798 | if (child_die->tag == DW_TAG_subrange_type) | |
15799 | { | |
f792889a | 15800 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 15801 | |
f792889a | 15802 | if (child_type != NULL) |
a02abb62 | 15803 | { |
0963b4bd MS |
15804 | /* The range type was succesfully read. Save it for the |
15805 | array type creation. */ | |
791afaa2 | 15806 | range_types.push_back (child_type); |
a02abb62 | 15807 | } |
c906108c SS |
15808 | } |
15809 | child_die = sibling_die (child_die); | |
15810 | } | |
15811 | ||
15812 | /* Dwarf2 dimensions are output from left to right, create the | |
15813 | necessary array types in backwards order. */ | |
7ca2d3a3 | 15814 | |
c906108c | 15815 | type = element_type; |
7ca2d3a3 DL |
15816 | |
15817 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
15818 | { | |
15819 | int i = 0; | |
9a619af0 | 15820 | |
791afaa2 | 15821 | while (i < range_types.size ()) |
dc53a7ad | 15822 | type = create_array_type_with_stride (NULL, type, range_types[i++], |
a405673c | 15823 | byte_stride_prop, bit_stride); |
7ca2d3a3 DL |
15824 | } |
15825 | else | |
15826 | { | |
791afaa2 | 15827 | size_t ndim = range_types.size (); |
7ca2d3a3 | 15828 | while (ndim-- > 0) |
dc53a7ad | 15829 | type = create_array_type_with_stride (NULL, type, range_types[ndim], |
a405673c | 15830 | byte_stride_prop, bit_stride); |
7ca2d3a3 | 15831 | } |
c906108c | 15832 | |
f5f8a009 EZ |
15833 | /* Understand Dwarf2 support for vector types (like they occur on |
15834 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
15835 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
15836 | custom vendor extension. The main difference between a regular | |
15837 | array and the vector variant is that vectors are passed by value | |
15838 | to functions. */ | |
e142c38c | 15839 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 15840 | if (attr != nullptr) |
ea37ba09 | 15841 | make_vector_type (type); |
f5f8a009 | 15842 | |
dbc98a8b KW |
15843 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
15844 | implementation may choose to implement triple vectors using this | |
15845 | attribute. */ | |
15846 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 15847 | if (attr != nullptr) |
dbc98a8b KW |
15848 | { |
15849 | if (DW_UNSND (attr) >= TYPE_LENGTH (type)) | |
15850 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
15851 | else | |
b98664d3 | 15852 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 15853 | "than the total size of elements")); |
dbc98a8b KW |
15854 | } |
15855 | ||
39cbfefa DJ |
15856 | name = dwarf2_name (die, cu); |
15857 | if (name) | |
15858 | TYPE_NAME (type) = name; | |
6e70227d | 15859 | |
2b4424c3 TT |
15860 | maybe_set_alignment (cu, die, type); |
15861 | ||
0963b4bd | 15862 | /* Install the type in the die. */ |
7e314c57 JK |
15863 | set_die_type (die, type, cu); |
15864 | ||
15865 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
15866 | set_descriptive_type (type, die, cu); |
15867 | ||
7e314c57 | 15868 | return type; |
c906108c SS |
15869 | } |
15870 | ||
7ca2d3a3 | 15871 | static enum dwarf_array_dim_ordering |
6e70227d | 15872 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
15873 | { |
15874 | struct attribute *attr; | |
15875 | ||
15876 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
15877 | ||
435d3d88 | 15878 | if (attr != nullptr) |
aead7601 | 15879 | return (enum dwarf_array_dim_ordering) DW_SND (attr); |
7ca2d3a3 | 15880 | |
0963b4bd MS |
15881 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
15882 | opposite order to the dwarf2 specification, but data is still | |
15883 | laid out as per normal fortran. | |
7ca2d3a3 | 15884 | |
0963b4bd MS |
15885 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
15886 | version checking. */ | |
7ca2d3a3 | 15887 | |
905e0470 PM |
15888 | if (cu->language == language_fortran |
15889 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
15890 | { |
15891 | return DW_ORD_row_major; | |
15892 | } | |
15893 | ||
6e70227d | 15894 | switch (cu->language_defn->la_array_ordering) |
7ca2d3a3 DL |
15895 | { |
15896 | case array_column_major: | |
15897 | return DW_ORD_col_major; | |
15898 | case array_row_major: | |
15899 | default: | |
15900 | return DW_ORD_row_major; | |
15901 | }; | |
15902 | } | |
15903 | ||
72019c9c | 15904 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 15905 | the DIE's type field. */ |
72019c9c | 15906 | |
f792889a | 15907 | static struct type * |
72019c9c GM |
15908 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
15909 | { | |
7e314c57 JK |
15910 | struct type *domain_type, *set_type; |
15911 | struct attribute *attr; | |
f792889a | 15912 | |
7e314c57 JK |
15913 | domain_type = die_type (die, cu); |
15914 | ||
15915 | /* The die_type call above may have already set the type for this DIE. */ | |
15916 | set_type = get_die_type (die, cu); | |
15917 | if (set_type) | |
15918 | return set_type; | |
15919 | ||
15920 | set_type = create_set_type (NULL, domain_type); | |
15921 | ||
15922 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
435d3d88 | 15923 | if (attr != nullptr) |
d09039dd | 15924 | TYPE_LENGTH (set_type) = DW_UNSND (attr); |
7e314c57 | 15925 | |
2b4424c3 TT |
15926 | maybe_set_alignment (cu, die, set_type); |
15927 | ||
f792889a | 15928 | return set_die_type (die, set_type, cu); |
72019c9c | 15929 | } |
7ca2d3a3 | 15930 | |
0971de02 TT |
15931 | /* A helper for read_common_block that creates a locexpr baton. |
15932 | SYM is the symbol which we are marking as computed. | |
15933 | COMMON_DIE is the DIE for the common block. | |
15934 | COMMON_LOC is the location expression attribute for the common | |
15935 | block itself. | |
15936 | MEMBER_LOC is the location expression attribute for the particular | |
15937 | member of the common block that we are processing. | |
15938 | CU is the CU from which the above come. */ | |
15939 | ||
15940 | static void | |
15941 | mark_common_block_symbol_computed (struct symbol *sym, | |
15942 | struct die_info *common_die, | |
15943 | struct attribute *common_loc, | |
15944 | struct attribute *member_loc, | |
15945 | struct dwarf2_cu *cu) | |
15946 | { | |
518817b3 SM |
15947 | struct dwarf2_per_objfile *dwarf2_per_objfile |
15948 | = cu->per_cu->dwarf2_per_objfile; | |
0971de02 TT |
15949 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
15950 | struct dwarf2_locexpr_baton *baton; | |
15951 | gdb_byte *ptr; | |
15952 | unsigned int cu_off; | |
15953 | enum bfd_endian byte_order = gdbarch_byte_order (get_objfile_arch (objfile)); | |
15954 | LONGEST offset = 0; | |
15955 | ||
15956 | gdb_assert (common_loc && member_loc); | |
4fc6c0d5 TT |
15957 | gdb_assert (common_loc->form_is_block ()); |
15958 | gdb_assert (member_loc->form_is_block () | |
cd6c91b4 | 15959 | || member_loc->form_is_constant ()); |
0971de02 | 15960 | |
8d749320 | 15961 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
0971de02 TT |
15962 | baton->per_cu = cu->per_cu; |
15963 | gdb_assert (baton->per_cu); | |
15964 | ||
15965 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
15966 | ||
cd6c91b4 | 15967 | if (member_loc->form_is_constant ()) |
0971de02 TT |
15968 | { |
15969 | offset = dwarf2_get_attr_constant_value (member_loc, 0); | |
15970 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; | |
15971 | } | |
15972 | else | |
15973 | baton->size += DW_BLOCK (member_loc)->size; | |
15974 | ||
224c3ddb | 15975 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
15976 | baton->data = ptr; |
15977 | ||
15978 | *ptr++ = DW_OP_call4; | |
9c541725 | 15979 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
15980 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
15981 | ptr += 4; | |
15982 | ||
cd6c91b4 | 15983 | if (member_loc->form_is_constant ()) |
0971de02 TT |
15984 | { |
15985 | *ptr++ = DW_OP_addr; | |
15986 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
15987 | ptr += cu->header.addr_size; | |
15988 | } | |
15989 | else | |
15990 | { | |
15991 | /* We have to copy the data here, because DW_OP_call4 will only | |
15992 | use a DW_AT_location attribute. */ | |
15993 | memcpy (ptr, DW_BLOCK (member_loc)->data, DW_BLOCK (member_loc)->size); | |
15994 | ptr += DW_BLOCK (member_loc)->size; | |
15995 | } | |
15996 | ||
15997 | *ptr++ = DW_OP_plus; | |
15998 | gdb_assert (ptr - baton->data == baton->size); | |
15999 | ||
0971de02 | 16000 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16001 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16002 | } |
16003 | ||
4357ac6c TT |
16004 | /* Create appropriate locally-scoped variables for all the |
16005 | DW_TAG_common_block entries. Also create a struct common_block | |
16006 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 16007 | is used to separate the common blocks name namespace from regular |
4357ac6c | 16008 | variable names. */ |
c906108c SS |
16009 | |
16010 | static void | |
e7c27a73 | 16011 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16012 | { |
0971de02 TT |
16013 | struct attribute *attr; |
16014 | ||
16015 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16016 | if (attr != nullptr) |
0971de02 TT |
16017 | { |
16018 | /* Support the .debug_loc offsets. */ | |
4fc6c0d5 | 16019 | if (attr->form_is_block ()) |
0971de02 TT |
16020 | { |
16021 | /* Ok. */ | |
16022 | } | |
cd6c91b4 | 16023 | else if (attr->form_is_section_offset ()) |
0971de02 TT |
16024 | { |
16025 | dwarf2_complex_location_expr_complaint (); | |
16026 | attr = NULL; | |
16027 | } | |
16028 | else | |
16029 | { | |
16030 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
16031 | "common block member"); | |
16032 | attr = NULL; | |
16033 | } | |
16034 | } | |
16035 | ||
639d11d3 | 16036 | if (die->child != NULL) |
c906108c | 16037 | { |
518817b3 | 16038 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
4357ac6c TT |
16039 | struct die_info *child_die; |
16040 | size_t n_entries = 0, size; | |
16041 | struct common_block *common_block; | |
16042 | struct symbol *sym; | |
74ac6d43 | 16043 | |
4357ac6c TT |
16044 | for (child_die = die->child; |
16045 | child_die && child_die->tag; | |
16046 | child_die = sibling_die (child_die)) | |
16047 | ++n_entries; | |
16048 | ||
16049 | size = (sizeof (struct common_block) | |
16050 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16051 | common_block |
16052 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16053 | size); | |
4357ac6c TT |
16054 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16055 | common_block->n_entries = 0; | |
16056 | ||
16057 | for (child_die = die->child; | |
16058 | child_die && child_die->tag; | |
16059 | child_die = sibling_die (child_die)) | |
16060 | { | |
16061 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16062 | symbol scope. */ | |
e7c27a73 | 16063 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16064 | if (sym != NULL) |
16065 | { | |
16066 | struct attribute *member_loc; | |
16067 | ||
16068 | common_block->contents[common_block->n_entries++] = sym; | |
16069 | ||
16070 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16071 | cu); | |
16072 | if (member_loc) | |
16073 | { | |
16074 | /* GDB has handled this for a long time, but it is | |
16075 | not specified by DWARF. It seems to have been | |
16076 | emitted by gfortran at least as recently as: | |
16077 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16078 | complaint (_("Variable in common block has " |
0971de02 | 16079 | "DW_AT_data_member_location " |
9d8780f0 SM |
16080 | "- DIE at %s [in module %s]"), |
16081 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16082 | objfile_name (objfile)); |
0971de02 | 16083 | |
cd6c91b4 | 16084 | if (member_loc->form_is_section_offset ()) |
0971de02 | 16085 | dwarf2_complex_location_expr_complaint (); |
cd6c91b4 | 16086 | else if (member_loc->form_is_constant () |
4fc6c0d5 | 16087 | || member_loc->form_is_block ()) |
0971de02 | 16088 | { |
435d3d88 | 16089 | if (attr != nullptr) |
0971de02 TT |
16090 | mark_common_block_symbol_computed (sym, die, attr, |
16091 | member_loc, cu); | |
16092 | } | |
16093 | else | |
16094 | dwarf2_complex_location_expr_complaint (); | |
16095 | } | |
16096 | } | |
c906108c | 16097 | } |
4357ac6c TT |
16098 | |
16099 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16100 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16101 | } |
16102 | } | |
16103 | ||
0114d602 | 16104 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16105 | |
0114d602 DJ |
16106 | static struct type * |
16107 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16108 | { |
518817b3 | 16109 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16110 | const char *previous_prefix, *name; |
9219021c | 16111 | int is_anonymous; |
0114d602 DJ |
16112 | struct type *type; |
16113 | ||
16114 | /* For extensions, reuse the type of the original namespace. */ | |
16115 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16116 | { | |
16117 | struct die_info *ext_die; | |
16118 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16119 | |
0114d602 DJ |
16120 | ext_die = dwarf2_extension (die, &ext_cu); |
16121 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16122 | |
16123 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16124 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16125 | return set_die_type (die, type, cu); |
16126 | } | |
9219021c | 16127 | |
e142c38c | 16128 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16129 | |
16130 | /* Now build the name of the current namespace. */ | |
16131 | ||
0114d602 DJ |
16132 | previous_prefix = determine_prefix (die, cu); |
16133 | if (previous_prefix[0] != '\0') | |
16134 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16135 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16136 | |
16137 | /* Create the type. */ | |
19f392bc | 16138 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16139 | |
60531b24 | 16140 | return set_die_type (die, type, cu); |
0114d602 DJ |
16141 | } |
16142 | ||
22cee43f | 16143 | /* Read a namespace scope. */ |
0114d602 DJ |
16144 | |
16145 | static void | |
16146 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16147 | { | |
518817b3 | 16148 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16149 | int is_anonymous; |
9219021c | 16150 | |
5c4e30ca DC |
16151 | /* Add a symbol associated to this if we haven't seen the namespace |
16152 | before. Also, add a using directive if it's an anonymous | |
16153 | namespace. */ | |
9219021c | 16154 | |
f2f0e013 | 16155 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16156 | { |
16157 | struct type *type; | |
16158 | ||
0114d602 | 16159 | type = read_type_die (die, cu); |
e7c27a73 | 16160 | new_symbol (die, type, cu); |
5c4e30ca | 16161 | |
e8e80198 | 16162 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16163 | if (is_anonymous) |
0114d602 DJ |
16164 | { |
16165 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16166 | |
eb1e02fd | 16167 | std::vector<const char *> excludes; |
804d2729 | 16168 | add_using_directive (using_directives (cu), |
22cee43f | 16169 | previous_prefix, TYPE_NAME (type), NULL, |
eb1e02fd | 16170 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16171 | } |
5c4e30ca | 16172 | } |
9219021c | 16173 | |
639d11d3 | 16174 | if (die->child != NULL) |
d9fa45fe | 16175 | { |
639d11d3 | 16176 | struct die_info *child_die = die->child; |
6e70227d | 16177 | |
d9fa45fe DC |
16178 | while (child_die && child_die->tag) |
16179 | { | |
e7c27a73 | 16180 | process_die (child_die, cu); |
d9fa45fe DC |
16181 | child_die = sibling_die (child_die); |
16182 | } | |
16183 | } | |
38d518c9 EZ |
16184 | } |
16185 | ||
f55ee35c JK |
16186 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16187 | imported module. Still we need that type as local Fortran "use ... only" | |
16188 | declaration imports depend on the created type in determine_prefix. */ | |
16189 | ||
16190 | static struct type * | |
16191 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16192 | { | |
518817b3 | 16193 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
15d034d0 | 16194 | const char *module_name; |
f55ee35c JK |
16195 | struct type *type; |
16196 | ||
16197 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16198 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16199 | |
f55ee35c JK |
16200 | return set_die_type (die, type, cu); |
16201 | } | |
16202 | ||
5d7cb8df JK |
16203 | /* Read a Fortran module. */ |
16204 | ||
16205 | static void | |
16206 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16207 | { | |
16208 | struct die_info *child_die = die->child; | |
530e8392 KB |
16209 | struct type *type; |
16210 | ||
16211 | type = read_type_die (die, cu); | |
16212 | new_symbol (die, type, cu); | |
5d7cb8df | 16213 | |
5d7cb8df JK |
16214 | while (child_die && child_die->tag) |
16215 | { | |
16216 | process_die (child_die, cu); | |
16217 | child_die = sibling_die (child_die); | |
16218 | } | |
16219 | } | |
16220 | ||
38d518c9 EZ |
16221 | /* Return the name of the namespace represented by DIE. Set |
16222 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16223 | namespace. */ | |
16224 | ||
16225 | static const char * | |
e142c38c | 16226 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16227 | { |
16228 | struct die_info *current_die; | |
16229 | const char *name = NULL; | |
16230 | ||
16231 | /* Loop through the extensions until we find a name. */ | |
16232 | ||
16233 | for (current_die = die; | |
16234 | current_die != NULL; | |
f2f0e013 | 16235 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16236 | { |
96553a0c DE |
16237 | /* We don't use dwarf2_name here so that we can detect the absence |
16238 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16239 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16240 | |
38d518c9 EZ |
16241 | if (name != NULL) |
16242 | break; | |
16243 | } | |
16244 | ||
16245 | /* Is it an anonymous namespace? */ | |
16246 | ||
16247 | *is_anonymous = (name == NULL); | |
16248 | if (*is_anonymous) | |
2b1dbab0 | 16249 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
16250 | |
16251 | return name; | |
d9fa45fe DC |
16252 | } |
16253 | ||
c906108c SS |
16254 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
16255 | the user defined type vector. */ | |
16256 | ||
f792889a | 16257 | static struct type * |
e7c27a73 | 16258 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16259 | { |
518817b3 SM |
16260 | struct gdbarch *gdbarch |
16261 | = get_objfile_arch (cu->per_cu->dwarf2_per_objfile->objfile); | |
e7c27a73 | 16262 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 16263 | struct type *type; |
8b2dbe47 KB |
16264 | struct attribute *attr_byte_size; |
16265 | struct attribute *attr_address_class; | |
16266 | int byte_size, addr_class; | |
7e314c57 JK |
16267 | struct type *target_type; |
16268 | ||
16269 | target_type = die_type (die, cu); | |
c906108c | 16270 | |
7e314c57 JK |
16271 | /* The die_type call above may have already set the type for this DIE. */ |
16272 | type = get_die_type (die, cu); | |
16273 | if (type) | |
16274 | return type; | |
16275 | ||
16276 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 16277 | |
e142c38c | 16278 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 KB |
16279 | if (attr_byte_size) |
16280 | byte_size = DW_UNSND (attr_byte_size); | |
c906108c | 16281 | else |
8b2dbe47 KB |
16282 | byte_size = cu_header->addr_size; |
16283 | ||
e142c38c | 16284 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 KB |
16285 | if (attr_address_class) |
16286 | addr_class = DW_UNSND (attr_address_class); | |
16287 | else | |
16288 | addr_class = DW_ADDR_none; | |
16289 | ||
2b4424c3 TT |
16290 | ULONGEST alignment = get_alignment (cu, die); |
16291 | ||
16292 | /* If the pointer size, alignment, or address class is different | |
16293 | than the default, create a type variant marked as such and set | |
16294 | the length accordingly. */ | |
16295 | if (TYPE_LENGTH (type) != byte_size | |
16296 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
16297 | && alignment != TYPE_RAW_ALIGN (type)) | |
16298 | || addr_class != DW_ADDR_none) | |
c906108c | 16299 | { |
5e2b427d | 16300 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 KB |
16301 | { |
16302 | int type_flags; | |
16303 | ||
849957d9 | 16304 | type_flags = gdbarch_address_class_type_flags |
5e2b427d | 16305 | (gdbarch, byte_size, addr_class); |
876cecd0 TT |
16306 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
16307 | == 0); | |
8b2dbe47 KB |
16308 | type = make_type_with_address_space (type, type_flags); |
16309 | } | |
16310 | else if (TYPE_LENGTH (type) != byte_size) | |
16311 | { | |
b98664d3 | 16312 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 16313 | } |
2b4424c3 TT |
16314 | else if (TYPE_RAW_ALIGN (type) != alignment) |
16315 | { | |
b98664d3 | 16316 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
16317 | " - DIE at %s [in module %s]"), |
16318 | sect_offset_str (die->sect_off), | |
16319 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
16320 | } | |
6e70227d | 16321 | else |
9a619af0 MS |
16322 | { |
16323 | /* Should we also complain about unhandled address classes? */ | |
16324 | } | |
c906108c | 16325 | } |
8b2dbe47 KB |
16326 | |
16327 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 16328 | set_type_align (type, alignment); |
f792889a | 16329 | return set_die_type (die, type, cu); |
c906108c SS |
16330 | } |
16331 | ||
16332 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
16333 | the user defined type vector. */ | |
16334 | ||
f792889a | 16335 | static struct type * |
e7c27a73 | 16336 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
16337 | { |
16338 | struct type *type; | |
16339 | struct type *to_type; | |
16340 | struct type *domain; | |
16341 | ||
e7c27a73 DJ |
16342 | to_type = die_type (die, cu); |
16343 | domain = die_containing_type (die, cu); | |
0d5de010 | 16344 | |
7e314c57 JK |
16345 | /* The calls above may have already set the type for this DIE. */ |
16346 | type = get_die_type (die, cu); | |
16347 | if (type) | |
16348 | return type; | |
16349 | ||
0d5de010 DJ |
16350 | if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_METHOD) |
16351 | type = lookup_methodptr_type (to_type); | |
7078baeb TT |
16352 | else if (TYPE_CODE (check_typedef (to_type)) == TYPE_CODE_FUNC) |
16353 | { | |
518817b3 SM |
16354 | struct type *new_type |
16355 | = alloc_type (cu->per_cu->dwarf2_per_objfile->objfile); | |
7078baeb TT |
16356 | |
16357 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
16358 | TYPE_FIELDS (to_type), TYPE_NFIELDS (to_type), | |
16359 | TYPE_VARARGS (to_type)); | |
16360 | type = lookup_methodptr_type (new_type); | |
16361 | } | |
0d5de010 DJ |
16362 | else |
16363 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 16364 | |
f792889a | 16365 | return set_die_type (die, type, cu); |
c906108c SS |
16366 | } |
16367 | ||
4297a3f0 | 16368 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
16369 | the user defined type vector. */ |
16370 | ||
f792889a | 16371 | static struct type * |
4297a3f0 AV |
16372 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
16373 | enum type_code refcode) | |
c906108c | 16374 | { |
e7c27a73 | 16375 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 16376 | struct type *type, *target_type; |
c906108c SS |
16377 | struct attribute *attr; |
16378 | ||
4297a3f0 AV |
16379 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
16380 | ||
7e314c57 JK |
16381 | target_type = die_type (die, cu); |
16382 | ||
16383 | /* The die_type call above may have already set the type for this DIE. */ | |
16384 | type = get_die_type (die, cu); | |
16385 | if (type) | |
16386 | return type; | |
16387 | ||
4297a3f0 | 16388 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 16389 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16390 | if (attr != nullptr) |
c906108c SS |
16391 | { |
16392 | TYPE_LENGTH (type) = DW_UNSND (attr); | |
16393 | } | |
16394 | else | |
16395 | { | |
107d2387 | 16396 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 16397 | } |
2b4424c3 | 16398 | maybe_set_alignment (cu, die, type); |
f792889a | 16399 | return set_die_type (die, type, cu); |
c906108c SS |
16400 | } |
16401 | ||
cf363f18 MW |
16402 | /* Add the given cv-qualifiers to the element type of the array. GCC |
16403 | outputs DWARF type qualifiers that apply to an array, not the | |
16404 | element type. But GDB relies on the array element type to carry | |
16405 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
16406 | specification. */ | |
16407 | ||
16408 | static struct type * | |
16409 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
16410 | struct type *base_type, int cnst, int voltl) | |
16411 | { | |
16412 | struct type *el_type, *inner_array; | |
16413 | ||
16414 | base_type = copy_type (base_type); | |
16415 | inner_array = base_type; | |
16416 | ||
16417 | while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array)) == TYPE_CODE_ARRAY) | |
16418 | { | |
16419 | TYPE_TARGET_TYPE (inner_array) = | |
16420 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
16421 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
16422 | } | |
16423 | ||
16424 | el_type = TYPE_TARGET_TYPE (inner_array); | |
16425 | cnst |= TYPE_CONST (el_type); | |
16426 | voltl |= TYPE_VOLATILE (el_type); | |
16427 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
16428 | ||
16429 | return set_die_type (die, base_type, cu); | |
16430 | } | |
16431 | ||
f792889a | 16432 | static struct type * |
e7c27a73 | 16433 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16434 | { |
f792889a | 16435 | struct type *base_type, *cv_type; |
c906108c | 16436 | |
e7c27a73 | 16437 | base_type = die_type (die, cu); |
7e314c57 JK |
16438 | |
16439 | /* The die_type call above may have already set the type for this DIE. */ | |
16440 | cv_type = get_die_type (die, cu); | |
16441 | if (cv_type) | |
16442 | return cv_type; | |
16443 | ||
2f608a3a KW |
16444 | /* In case the const qualifier is applied to an array type, the element type |
16445 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
16446 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
cf363f18 | 16447 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 16448 | |
f792889a DJ |
16449 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
16450 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16451 | } |
16452 | ||
f792889a | 16453 | static struct type * |
e7c27a73 | 16454 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16455 | { |
f792889a | 16456 | struct type *base_type, *cv_type; |
c906108c | 16457 | |
e7c27a73 | 16458 | base_type = die_type (die, cu); |
7e314c57 JK |
16459 | |
16460 | /* The die_type call above may have already set the type for this DIE. */ | |
16461 | cv_type = get_die_type (die, cu); | |
16462 | if (cv_type) | |
16463 | return cv_type; | |
16464 | ||
cf363f18 MW |
16465 | /* In case the volatile qualifier is applied to an array type, the |
16466 | element type is so qualified, not the array type (section 6.7.3 | |
16467 | of C99). */ | |
16468 | if (TYPE_CODE (base_type) == TYPE_CODE_ARRAY) | |
16469 | return add_array_cv_type (die, cu, base_type, 0, 1); | |
16470 | ||
f792889a DJ |
16471 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
16472 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
16473 | } |
16474 | ||
06d66ee9 TT |
16475 | /* Handle DW_TAG_restrict_type. */ |
16476 | ||
16477 | static struct type * | |
16478 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
16479 | { | |
16480 | struct type *base_type, *cv_type; | |
16481 | ||
16482 | base_type = die_type (die, cu); | |
16483 | ||
16484 | /* The die_type call above may have already set the type for this DIE. */ | |
16485 | cv_type = get_die_type (die, cu); | |
16486 | if (cv_type) | |
16487 | return cv_type; | |
16488 | ||
16489 | cv_type = make_restrict_type (base_type); | |
16490 | return set_die_type (die, cv_type, cu); | |
16491 | } | |
16492 | ||
a2c2acaf MW |
16493 | /* Handle DW_TAG_atomic_type. */ |
16494 | ||
16495 | static struct type * | |
16496 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
16497 | { | |
16498 | struct type *base_type, *cv_type; | |
16499 | ||
16500 | base_type = die_type (die, cu); | |
16501 | ||
16502 | /* The die_type call above may have already set the type for this DIE. */ | |
16503 | cv_type = get_die_type (die, cu); | |
16504 | if (cv_type) | |
16505 | return cv_type; | |
16506 | ||
16507 | cv_type = make_atomic_type (base_type); | |
16508 | return set_die_type (die, cv_type, cu); | |
16509 | } | |
16510 | ||
c906108c SS |
16511 | /* Extract all information from a DW_TAG_string_type DIE and add to |
16512 | the user defined type vector. It isn't really a user defined type, | |
16513 | but it behaves like one, with other DIE's using an AT_user_def_type | |
16514 | attribute to reference it. */ | |
16515 | ||
f792889a | 16516 | static struct type * |
e7c27a73 | 16517 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16518 | { |
518817b3 | 16519 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
3b7538c0 | 16520 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c SS |
16521 | struct type *type, *range_type, *index_type, *char_type; |
16522 | struct attribute *attr; | |
216a7e6b AB |
16523 | struct dynamic_prop prop; |
16524 | bool length_is_constant = true; | |
16525 | LONGEST length; | |
16526 | ||
16527 | /* There are a couple of places where bit sizes might be made use of | |
16528 | when parsing a DW_TAG_string_type, however, no producer that we know | |
16529 | of make use of these. Handling bit sizes that are a multiple of the | |
16530 | byte size is easy enough, but what about other bit sizes? Lets deal | |
16531 | with that problem when we have to. Warn about these attributes being | |
16532 | unsupported, then parse the type and ignore them like we always | |
16533 | have. */ | |
16534 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
16535 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
16536 | { | |
16537 | static bool warning_printed = false; | |
16538 | if (!warning_printed) | |
16539 | { | |
16540 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
16541 | "currently supported on DW_TAG_string_type.")); | |
16542 | warning_printed = true; | |
16543 | } | |
16544 | } | |
c906108c | 16545 | |
e142c38c | 16546 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
cd6c91b4 | 16547 | if (attr != nullptr && !attr->form_is_constant ()) |
216a7e6b AB |
16548 | { |
16549 | /* The string length describes the location at which the length of | |
16550 | the string can be found. The size of the length field can be | |
16551 | specified with one of the attributes below. */ | |
16552 | struct type *prop_type; | |
16553 | struct attribute *len | |
16554 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
16555 | if (len == nullptr) | |
16556 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
cd6c91b4 | 16557 | if (len != nullptr && len->form_is_constant ()) |
216a7e6b AB |
16558 | { |
16559 | /* Pass 0 as the default as we know this attribute is constant | |
16560 | and the default value will not be returned. */ | |
16561 | LONGEST sz = dwarf2_get_attr_constant_value (len, 0); | |
09ba997f | 16562 | prop_type = cu->per_cu->int_type (sz, true); |
216a7e6b AB |
16563 | } |
16564 | else | |
16565 | { | |
16566 | /* If the size is not specified then we assume it is the size of | |
16567 | an address on this target. */ | |
09ba997f | 16568 | prop_type = cu->per_cu->addr_sized_int_type (true); |
216a7e6b AB |
16569 | } |
16570 | ||
16571 | /* Convert the attribute into a dynamic property. */ | |
16572 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
16573 | length = 1; | |
16574 | else | |
16575 | length_is_constant = false; | |
16576 | } | |
16577 | else if (attr != nullptr) | |
16578 | { | |
16579 | /* This DW_AT_string_length just contains the length with no | |
16580 | indirection. There's no need to create a dynamic property in this | |
16581 | case. Pass 0 for the default value as we know it will not be | |
16582 | returned in this case. */ | |
16583 | length = dwarf2_get_attr_constant_value (attr, 0); | |
16584 | } | |
16585 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 16586 | { |
216a7e6b AB |
16587 | /* We don't currently support non-constant byte sizes for strings. */ |
16588 | length = dwarf2_get_attr_constant_value (attr, 1); | |
c906108c SS |
16589 | } |
16590 | else | |
16591 | { | |
216a7e6b AB |
16592 | /* Use 1 as a fallback length if we have nothing else. */ |
16593 | length = 1; | |
c906108c | 16594 | } |
6ccb9162 | 16595 | |
46bf5051 | 16596 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
16597 | if (length_is_constant) |
16598 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
16599 | else | |
16600 | { | |
16601 | struct dynamic_prop low_bound; | |
16602 | ||
16603 | low_bound.kind = PROP_CONST; | |
16604 | low_bound.data.const_val = 1; | |
16605 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); | |
16606 | } | |
3b7538c0 UW |
16607 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
16608 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 16609 | |
f792889a | 16610 | return set_die_type (die, type, cu); |
c906108c SS |
16611 | } |
16612 | ||
4d804846 JB |
16613 | /* Assuming that DIE corresponds to a function, returns nonzero |
16614 | if the function is prototyped. */ | |
16615 | ||
16616 | static int | |
16617 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
16618 | { | |
16619 | struct attribute *attr; | |
16620 | ||
16621 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
16622 | if (attr && (DW_UNSND (attr) != 0)) | |
16623 | return 1; | |
16624 | ||
16625 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 16626 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
16627 | languages that allow unprototyped functions (Eg: Objective C). |
16628 | For all other languages, assume that functions are always | |
16629 | prototyped. */ | |
16630 | if (cu->language != language_c | |
16631 | && cu->language != language_objc | |
16632 | && cu->language != language_opencl) | |
16633 | return 1; | |
16634 | ||
16635 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
16636 | prototyped and unprototyped functions; default to prototyped, | |
16637 | since that is more common in modern code (and RealView warns | |
16638 | about unprototyped functions). */ | |
16639 | if (producer_is_realview (cu->producer)) | |
16640 | return 1; | |
16641 | ||
16642 | return 0; | |
16643 | } | |
16644 | ||
c906108c SS |
16645 | /* Handle DIES due to C code like: |
16646 | ||
16647 | struct foo | |
c5aa993b JM |
16648 | { |
16649 | int (*funcp)(int a, long l); | |
16650 | int b; | |
16651 | }; | |
c906108c | 16652 | |
0963b4bd | 16653 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 16654 | |
f792889a | 16655 | static struct type * |
e7c27a73 | 16656 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16657 | { |
518817b3 | 16658 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0963b4bd MS |
16659 | struct type *type; /* Type that this function returns. */ |
16660 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
16661 | struct attribute *attr; |
16662 | ||
e7c27a73 | 16663 | type = die_type (die, cu); |
7e314c57 JK |
16664 | |
16665 | /* The die_type call above may have already set the type for this DIE. */ | |
16666 | ftype = get_die_type (die, cu); | |
16667 | if (ftype) | |
16668 | return ftype; | |
16669 | ||
0c8b41f1 | 16670 | ftype = lookup_function_type (type); |
c906108c | 16671 | |
4d804846 | 16672 | if (prototyped_function_p (die, cu)) |
a6c727b2 | 16673 | TYPE_PROTOTYPED (ftype) = 1; |
c906108c | 16674 | |
c055b101 CV |
16675 | /* Store the calling convention in the type if it's available in |
16676 | the subroutine die. Otherwise set the calling convention to | |
16677 | the default value DW_CC_normal. */ | |
16678 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf TBA |
16679 | if (attr != nullptr |
16680 | && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr))) | |
16681 | TYPE_CALLING_CONVENTION (ftype) | |
16682 | = (enum dwarf_calling_convention) (DW_UNSND (attr)); | |
54fcddd0 UW |
16683 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
16684 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
16685 | else | |
16686 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 16687 | |
743649fd MW |
16688 | /* Record whether the function returns normally to its caller or not |
16689 | if the DWARF producer set that information. */ | |
16690 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
16691 | if (attr && (DW_UNSND (attr) != 0)) | |
16692 | TYPE_NO_RETURN (ftype) = 1; | |
16693 | ||
76c10ea2 GM |
16694 | /* We need to add the subroutine type to the die immediately so |
16695 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 16696 | declared as the same subroutine type. */ |
76c10ea2 | 16697 | set_die_type (die, ftype, cu); |
6e70227d | 16698 | |
639d11d3 | 16699 | if (die->child != NULL) |
c906108c | 16700 | { |
bb5ed363 | 16701 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 16702 | struct die_info *child_die; |
8072405b | 16703 | int nparams, iparams; |
c906108c SS |
16704 | |
16705 | /* Count the number of parameters. | |
16706 | FIXME: GDB currently ignores vararg functions, but knows about | |
16707 | vararg member functions. */ | |
8072405b | 16708 | nparams = 0; |
639d11d3 | 16709 | child_die = die->child; |
c906108c SS |
16710 | while (child_die && child_die->tag) |
16711 | { | |
16712 | if (child_die->tag == DW_TAG_formal_parameter) | |
16713 | nparams++; | |
16714 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
876cecd0 | 16715 | TYPE_VARARGS (ftype) = 1; |
c906108c SS |
16716 | child_die = sibling_die (child_die); |
16717 | } | |
16718 | ||
16719 | /* Allocate storage for parameters and fill them in. */ | |
16720 | TYPE_NFIELDS (ftype) = nparams; | |
16721 | TYPE_FIELDS (ftype) = (struct field *) | |
ae5a43e0 | 16722 | TYPE_ZALLOC (ftype, nparams * sizeof (struct field)); |
c906108c | 16723 | |
8072405b JK |
16724 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
16725 | even if we error out during the parameters reading below. */ | |
16726 | for (iparams = 0; iparams < nparams; iparams++) | |
16727 | TYPE_FIELD_TYPE (ftype, iparams) = void_type; | |
16728 | ||
16729 | iparams = 0; | |
639d11d3 | 16730 | child_die = die->child; |
c906108c SS |
16731 | while (child_die && child_die->tag) |
16732 | { | |
16733 | if (child_die->tag == DW_TAG_formal_parameter) | |
16734 | { | |
3ce3b1ba PA |
16735 | struct type *arg_type; |
16736 | ||
16737 | /* DWARF version 2 has no clean way to discern C++ | |
16738 | static and non-static member functions. G++ helps | |
16739 | GDB by marking the first parameter for non-static | |
16740 | member functions (which is the this pointer) as | |
16741 | artificial. We pass this information to | |
16742 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
16743 | ||
16744 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
16745 | 4.5 does not yet generate. */ | |
e142c38c | 16746 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 16747 | if (attr != nullptr) |
c906108c SS |
16748 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = DW_UNSND (attr); |
16749 | else | |
9c37b5ae | 16750 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
16751 | arg_type = die_type (child_die, cu); |
16752 | ||
16753 | /* RealView does not mark THIS as const, which the testsuite | |
16754 | expects. GCC marks THIS as const in method definitions, | |
16755 | but not in the class specifications (GCC PR 43053). */ | |
16756 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
16757 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
16758 | { | |
16759 | int is_this = 0; | |
16760 | struct dwarf2_cu *arg_cu = cu; | |
16761 | const char *name = dwarf2_name (child_die, cu); | |
16762 | ||
16763 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 16764 | if (attr != nullptr) |
3ce3b1ba PA |
16765 | { |
16766 | /* If the compiler emits this, use it. */ | |
16767 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
16768 | is_this = 1; | |
16769 | } | |
16770 | else if (name && strcmp (name, "this") == 0) | |
16771 | /* Function definitions will have the argument names. */ | |
16772 | is_this = 1; | |
16773 | else if (name == NULL && iparams == 0) | |
16774 | /* Declarations may not have the names, so like | |
16775 | elsewhere in GDB, assume an artificial first | |
16776 | argument is "this". */ | |
16777 | is_this = 1; | |
16778 | ||
16779 | if (is_this) | |
16780 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
16781 | arg_type, 0); | |
16782 | } | |
16783 | ||
16784 | TYPE_FIELD_TYPE (ftype, iparams) = arg_type; | |
c906108c SS |
16785 | iparams++; |
16786 | } | |
16787 | child_die = sibling_die (child_die); | |
16788 | } | |
16789 | } | |
16790 | ||
76c10ea2 | 16791 | return ftype; |
c906108c SS |
16792 | } |
16793 | ||
f792889a | 16794 | static struct type * |
e7c27a73 | 16795 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16796 | { |
518817b3 | 16797 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0114d602 | 16798 | const char *name = NULL; |
3c8e0968 | 16799 | struct type *this_type, *target_type; |
c906108c | 16800 | |
94af9270 | 16801 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc UW |
16802 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
16803 | TYPE_TARGET_STUB (this_type) = 1; | |
f792889a | 16804 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
16805 | target_type = die_type (die, cu); |
16806 | if (target_type != this_type) | |
16807 | TYPE_TARGET_TYPE (this_type) = target_type; | |
16808 | else | |
16809 | { | |
16810 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
16811 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 16812 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
16813 | "- DIE at %s [in module %s]"), |
16814 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
16815 | TYPE_TARGET_TYPE (this_type) = NULL; |
16816 | } | |
e4003a34 TV |
16817 | if (name == NULL) |
16818 | { | |
16819 | /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates | |
16820 | anonymous typedefs, which is, strictly speaking, invalid DWARF. | |
16821 | Handle these by just returning the target type, rather than | |
16822 | constructing an anonymous typedef type and trying to handle this | |
16823 | elsewhere. */ | |
16824 | set_die_type (die, target_type, cu); | |
16825 | return target_type; | |
16826 | } | |
f792889a | 16827 | return this_type; |
c906108c SS |
16828 | } |
16829 | ||
9b790ce7 UW |
16830 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
16831 | (which may be different from NAME) to the architecture back-end to allow | |
16832 | it to guess the correct format if necessary. */ | |
16833 | ||
16834 | static struct type * | |
16835 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 16836 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 UW |
16837 | { |
16838 | struct gdbarch *gdbarch = get_objfile_arch (objfile); | |
16839 | const struct floatformat **format; | |
16840 | struct type *type; | |
16841 | ||
16842 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
16843 | if (format) | |
103a685e | 16844 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 16845 | else |
77b7c781 | 16846 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
16847 | |
16848 | return type; | |
16849 | } | |
16850 | ||
eb77c9df AB |
16851 | /* Allocate an integer type of size BITS and name NAME. */ |
16852 | ||
16853 | static struct type * | |
16854 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
16855 | int bits, int unsigned_p, const char *name) | |
16856 | { | |
16857 | struct type *type; | |
16858 | ||
16859 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
16860 | instead of using DW_TAG_unspecified_type. This has been seen on | |
16861 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
16862 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
16863 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
16864 | type = objfile_type (objfile)->builtin_void; |
16865 | else | |
16866 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
16867 | ||
16868 | return type; | |
16869 | } | |
16870 | ||
8bdc1658 AB |
16871 | /* Initialise and return a floating point type of size BITS suitable for |
16872 | use as a component of a complex number. The NAME_HINT is passed through | |
16873 | when initialising the floating point type and is the name of the complex | |
16874 | type. | |
16875 | ||
16876 | As DWARF doesn't currently provide an explicit name for the components | |
16877 | of a complex number, but it can be helpful to have these components | |
16878 | named, we try to select a suitable name based on the size of the | |
16879 | component. */ | |
16880 | static struct type * | |
16881 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
16882 | struct objfile *objfile, | |
103a685e TT |
16883 | int bits, const char *name_hint, |
16884 | enum bfd_endian byte_order) | |
8bdc1658 AB |
16885 | { |
16886 | gdbarch *gdbarch = get_objfile_arch (objfile); | |
16887 | struct type *tt = nullptr; | |
16888 | ||
35add35e AB |
16889 | /* Try to find a suitable floating point builtin type of size BITS. |
16890 | We're going to use the name of this type as the name for the complex | |
16891 | target type that we are about to create. */ | |
1db455a7 | 16892 | switch (cu->language) |
8bdc1658 | 16893 | { |
1db455a7 AB |
16894 | case language_fortran: |
16895 | switch (bits) | |
16896 | { | |
16897 | case 32: | |
16898 | tt = builtin_f_type (gdbarch)->builtin_real; | |
16899 | break; | |
16900 | case 64: | |
16901 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
16902 | break; | |
16903 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
16904 | case 128: | |
16905 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
16906 | break; | |
16907 | } | |
8bdc1658 | 16908 | break; |
1db455a7 AB |
16909 | default: |
16910 | switch (bits) | |
16911 | { | |
16912 | case 32: | |
16913 | tt = builtin_type (gdbarch)->builtin_float; | |
16914 | break; | |
16915 | case 64: | |
16916 | tt = builtin_type (gdbarch)->builtin_double; | |
16917 | break; | |
16918 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
16919 | case 128: | |
16920 | tt = builtin_type (gdbarch)->builtin_long_double; | |
16921 | break; | |
16922 | } | |
8bdc1658 AB |
16923 | break; |
16924 | } | |
16925 | ||
35add35e AB |
16926 | /* If the type we found doesn't match the size we were looking for, then |
16927 | pretend we didn't find a type at all, the complex target type we | |
16928 | create will then be nameless. */ | |
a12e5744 | 16929 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
16930 | tt = nullptr; |
16931 | ||
8bdc1658 | 16932 | const char *name = (tt == nullptr) ? nullptr : TYPE_NAME (tt); |
103a685e | 16933 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
16934 | } |
16935 | ||
c906108c SS |
16936 | /* Find a representation of a given base type and install |
16937 | it in the TYPE field of the die. */ | |
16938 | ||
f792889a | 16939 | static struct type * |
e7c27a73 | 16940 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16941 | { |
518817b3 | 16942 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c SS |
16943 | struct type *type; |
16944 | struct attribute *attr; | |
19f392bc | 16945 | int encoding = 0, bits = 0; |
15d034d0 | 16946 | const char *name; |
34877895 | 16947 | gdbarch *arch; |
c906108c | 16948 | |
e142c38c | 16949 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
435d3d88 | 16950 | if (attr != nullptr) |
34877895 | 16951 | encoding = DW_UNSND (attr); |
e142c38c | 16952 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16953 | if (attr != nullptr) |
34877895 | 16954 | bits = DW_UNSND (attr) * TARGET_CHAR_BIT; |
39cbfefa | 16955 | name = dwarf2_name (die, cu); |
6ccb9162 | 16956 | if (!name) |
34877895 | 16957 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e TT |
16958 | |
16959 | arch = get_objfile_arch (objfile); | |
16960 | enum bfd_endian byte_order = gdbarch_byte_order (arch); | |
16961 | ||
34877895 PJ |
16962 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
16963 | if (attr) | |
103a685e TT |
16964 | { |
16965 | int endianity = DW_UNSND (attr); | |
16966 | ||
16967 | switch (endianity) | |
16968 | { | |
16969 | case DW_END_big: | |
16970 | byte_order = BFD_ENDIAN_BIG; | |
16971 | break; | |
16972 | case DW_END_little: | |
16973 | byte_order = BFD_ENDIAN_LITTLE; | |
16974 | break; | |
16975 | default: | |
16976 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
16977 | break; | |
16978 | } | |
16979 | } | |
6ccb9162 UW |
16980 | |
16981 | switch (encoding) | |
c906108c | 16982 | { |
6ccb9162 UW |
16983 | case DW_ATE_address: |
16984 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 16985 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 16986 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
16987 | break; |
16988 | case DW_ATE_boolean: | |
19f392bc | 16989 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
16990 | break; |
16991 | case DW_ATE_complex_float: | |
103a685e TT |
16992 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
16993 | byte_order); | |
19f392bc | 16994 | type = init_complex_type (objfile, name, type); |
6ccb9162 UW |
16995 | break; |
16996 | case DW_ATE_decimal_float: | |
19f392bc | 16997 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
16998 | break; |
16999 | case DW_ATE_float: | |
103a685e | 17000 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
17001 | break; |
17002 | case DW_ATE_signed: | |
eb77c9df | 17003 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17004 | break; |
17005 | case DW_ATE_unsigned: | |
3b2b8fea TT |
17006 | if (cu->language == language_fortran |
17007 | && name | |
61012eef | 17008 | && startswith (name, "character(")) |
19f392bc UW |
17009 | type = init_character_type (objfile, bits, 1, name); |
17010 | else | |
eb77c9df | 17011 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
17012 | break; |
17013 | case DW_ATE_signed_char: | |
6e70227d | 17014 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
17015 | || cu->language == language_pascal |
17016 | || cu->language == language_fortran) | |
19f392bc UW |
17017 | type = init_character_type (objfile, bits, 0, name); |
17018 | else | |
eb77c9df | 17019 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
17020 | break; |
17021 | case DW_ATE_unsigned_char: | |
868a0084 | 17022 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 17023 | || cu->language == language_pascal |
c44af4eb TT |
17024 | || cu->language == language_fortran |
17025 | || cu->language == language_rust) | |
19f392bc UW |
17026 | type = init_character_type (objfile, bits, 1, name); |
17027 | else | |
eb77c9df | 17028 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 17029 | break; |
75079b2b | 17030 | case DW_ATE_UTF: |
53e710ac | 17031 | { |
53e710ac PA |
17032 | if (bits == 16) |
17033 | type = builtin_type (arch)->builtin_char16; | |
17034 | else if (bits == 32) | |
17035 | type = builtin_type (arch)->builtin_char32; | |
17036 | else | |
17037 | { | |
b98664d3 | 17038 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 17039 | bits); |
eb77c9df | 17040 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
17041 | } |
17042 | return set_die_type (die, type, cu); | |
17043 | } | |
75079b2b TT |
17044 | break; |
17045 | ||
6ccb9162 | 17046 | default: |
b98664d3 | 17047 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 17048 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 17049 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 17050 | break; |
c906108c | 17051 | } |
6ccb9162 | 17052 | |
0114d602 | 17053 | if (name && strcmp (name, "char") == 0) |
876cecd0 | 17054 | TYPE_NOSIGN (type) = 1; |
0114d602 | 17055 | |
2b4424c3 TT |
17056 | maybe_set_alignment (cu, die, type); |
17057 | ||
103a685e | 17058 | TYPE_ENDIANITY_NOT_DEFAULT (type) = gdbarch_byte_order (arch) != byte_order; |
34877895 | 17059 | |
f792889a | 17060 | return set_die_type (die, type, cu); |
c906108c SS |
17061 | } |
17062 | ||
80180f79 SA |
17063 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
17064 | resulting value of the attribute into struct bound_prop. | |
17065 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
17066 | ||
17067 | static int | |
17068 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
17069 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
17070 | struct type *default_type) | |
80180f79 SA |
17071 | { |
17072 | struct dwarf2_property_baton *baton; | |
518817b3 SM |
17073 | struct obstack *obstack |
17074 | = &cu->per_cu->dwarf2_per_objfile->objfile->objfile_obstack; | |
80180f79 | 17075 | |
9a49df9d AB |
17076 | gdb_assert (default_type != NULL); |
17077 | ||
80180f79 SA |
17078 | if (attr == NULL || prop == NULL) |
17079 | return 0; | |
17080 | ||
4fc6c0d5 | 17081 | if (attr->form_is_block ()) |
80180f79 | 17082 | { |
8d749320 | 17083 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17084 | baton->property_type = default_type; |
80180f79 SA |
17085 | baton->locexpr.per_cu = cu->per_cu; |
17086 | baton->locexpr.size = DW_BLOCK (attr)->size; | |
17087 | baton->locexpr.data = DW_BLOCK (attr)->data; | |
216a7e6b AB |
17088 | switch (attr->name) |
17089 | { | |
17090 | case DW_AT_string_length: | |
17091 | baton->locexpr.is_reference = true; | |
17092 | break; | |
17093 | default: | |
17094 | baton->locexpr.is_reference = false; | |
17095 | break; | |
17096 | } | |
80180f79 SA |
17097 | prop->data.baton = baton; |
17098 | prop->kind = PROP_LOCEXPR; | |
17099 | gdb_assert (prop->data.baton != NULL); | |
17100 | } | |
cd6c91b4 | 17101 | else if (attr->form_is_ref ()) |
80180f79 SA |
17102 | { |
17103 | struct dwarf2_cu *target_cu = cu; | |
17104 | struct die_info *target_die; | |
17105 | struct attribute *target_attr; | |
17106 | ||
17107 | target_die = follow_die_ref (die, attr, &target_cu); | |
17108 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
17109 | if (target_attr == NULL) |
17110 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
17111 | target_cu); | |
80180f79 SA |
17112 | if (target_attr == NULL) |
17113 | return 0; | |
17114 | ||
df25ebbd | 17115 | switch (target_attr->name) |
80180f79 | 17116 | { |
df25ebbd | 17117 | case DW_AT_location: |
cd6c91b4 | 17118 | if (target_attr->form_is_section_offset ()) |
df25ebbd | 17119 | { |
8d749320 | 17120 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17121 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17122 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
17123 | prop->data.baton = baton; | |
17124 | prop->kind = PROP_LOCLIST; | |
17125 | gdb_assert (prop->data.baton != NULL); | |
17126 | } | |
4fc6c0d5 | 17127 | else if (target_attr->form_is_block ()) |
df25ebbd | 17128 | { |
8d749320 | 17129 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17130 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd JB |
17131 | baton->locexpr.per_cu = cu->per_cu; |
17132 | baton->locexpr.size = DW_BLOCK (target_attr)->size; | |
17133 | baton->locexpr.data = DW_BLOCK (target_attr)->data; | |
9a49df9d | 17134 | baton->locexpr.is_reference = true; |
df25ebbd JB |
17135 | prop->data.baton = baton; |
17136 | prop->kind = PROP_LOCEXPR; | |
17137 | gdb_assert (prop->data.baton != NULL); | |
17138 | } | |
17139 | else | |
17140 | { | |
17141 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
17142 | "dynamic property"); | |
17143 | return 0; | |
17144 | } | |
17145 | break; | |
17146 | case DW_AT_data_member_location: | |
17147 | { | |
17148 | LONGEST offset; | |
17149 | ||
17150 | if (!handle_data_member_location (target_die, target_cu, | |
17151 | &offset)) | |
17152 | return 0; | |
17153 | ||
8d749320 | 17154 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 17155 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 17156 | target_cu); |
df25ebbd JB |
17157 | baton->offset_info.offset = offset; |
17158 | baton->offset_info.type = die_type (target_die, target_cu); | |
17159 | prop->data.baton = baton; | |
17160 | prop->kind = PROP_ADDR_OFFSET; | |
17161 | break; | |
17162 | } | |
80180f79 SA |
17163 | } |
17164 | } | |
cd6c91b4 | 17165 | else if (attr->form_is_constant ()) |
80180f79 SA |
17166 | { |
17167 | prop->data.const_val = dwarf2_get_attr_constant_value (attr, 0); | |
17168 | prop->kind = PROP_CONST; | |
17169 | } | |
17170 | else | |
17171 | { | |
17172 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
17173 | dwarf2_name (die, cu)); | |
17174 | return 0; | |
17175 | } | |
17176 | ||
17177 | return 1; | |
17178 | } | |
17179 | ||
09ba997f | 17180 | /* See read.h. */ |
9a49df9d | 17181 | |
09ba997f TT |
17182 | struct type * |
17183 | dwarf2_per_cu_data::int_type (int size_in_bytes, bool unsigned_p) const | |
9a49df9d | 17184 | { |
09ba997f | 17185 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
17186 | struct type *int_type; |
17187 | ||
17188 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
17189 | #define TRY_TYPE(F) \ |
17190 | int_type = (unsigned_p \ | |
17191 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
17192 | : objfile_type (objfile)->builtin_ ## F); \ | |
17193 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
17194 | return int_type |
17195 | ||
17196 | TRY_TYPE (char); | |
17197 | TRY_TYPE (short); | |
17198 | TRY_TYPE (int); | |
17199 | TRY_TYPE (long); | |
17200 | TRY_TYPE (long_long); | |
17201 | ||
17202 | #undef TRY_TYPE | |
17203 | ||
17204 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
17205 | } | |
17206 | ||
09ba997f | 17207 | /* See read.h. */ |
11a8b164 | 17208 | |
09ba997f TT |
17209 | struct type * |
17210 | dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p) const | |
11a8b164 | 17211 | { |
09ba997f TT |
17212 | int addr_size = this->addr_size (); |
17213 | return int_type (addr_size, unsigned_p); | |
11a8b164 AB |
17214 | } |
17215 | ||
b86352cf AB |
17216 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
17217 | present (which is valid) then compute the default type based on the | |
17218 | compilation units address size. */ | |
17219 | ||
17220 | static struct type * | |
17221 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
17222 | { | |
17223 | struct type *index_type = die_type (die, cu); | |
17224 | ||
17225 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
17226 | without specifying a base type. | |
17227 | In that case, the base type must be set to the type of | |
17228 | the lower bound, upper bound or count, in that order, if any of these | |
17229 | three attributes references an object that has a type. | |
17230 | If no base type is found, the Dwarf-2 specifications say that | |
17231 | a signed integer type of size equal to the size of an address should | |
17232 | be used. | |
17233 | For the following C code: `extern char gdb_int [];' | |
17234 | GCC produces an empty range DIE. | |
17235 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
17236 | high bound or count are not yet handled by this code. */ | |
17237 | if (TYPE_CODE (index_type) == TYPE_CODE_VOID) | |
09ba997f | 17238 | index_type = cu->per_cu->addr_sized_int_type (false); |
b86352cf AB |
17239 | |
17240 | return index_type; | |
17241 | } | |
17242 | ||
a02abb62 JB |
17243 | /* Read the given DW_AT_subrange DIE. */ |
17244 | ||
f792889a | 17245 | static struct type * |
a02abb62 JB |
17246 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
17247 | { | |
4c9ad8c2 | 17248 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
17249 | struct type *range_type; |
17250 | struct attribute *attr; | |
729efb13 | 17251 | struct dynamic_prop low, high; |
4fae6e18 | 17252 | int low_default_is_valid; |
c451ebe5 | 17253 | int high_bound_is_count = 0; |
15d034d0 | 17254 | const char *name; |
d359392f | 17255 | ULONGEST negative_mask; |
e77813c8 | 17256 | |
b86352cf AB |
17257 | orig_base_type = read_subrange_index_type (die, cu); |
17258 | ||
4c9ad8c2 TT |
17259 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
17260 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
17261 | creating the range type, but we use the result of check_typedef | |
17262 | when examining properties of the type. */ | |
17263 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 17264 | |
7e314c57 JK |
17265 | /* The die_type call above may have already set the type for this DIE. */ |
17266 | range_type = get_die_type (die, cu); | |
17267 | if (range_type) | |
17268 | return range_type; | |
17269 | ||
729efb13 SA |
17270 | low.kind = PROP_CONST; |
17271 | high.kind = PROP_CONST; | |
17272 | high.data.const_val = 0; | |
17273 | ||
4fae6e18 JK |
17274 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
17275 | omitting DW_AT_lower_bound. */ | |
17276 | switch (cu->language) | |
6e70227d | 17277 | { |
4fae6e18 JK |
17278 | case language_c: |
17279 | case language_cplus: | |
729efb13 | 17280 | low.data.const_val = 0; |
4fae6e18 JK |
17281 | low_default_is_valid = 1; |
17282 | break; | |
17283 | case language_fortran: | |
729efb13 | 17284 | low.data.const_val = 1; |
4fae6e18 JK |
17285 | low_default_is_valid = 1; |
17286 | break; | |
17287 | case language_d: | |
4fae6e18 | 17288 | case language_objc: |
c44af4eb | 17289 | case language_rust: |
729efb13 | 17290 | low.data.const_val = 0; |
4fae6e18 JK |
17291 | low_default_is_valid = (cu->header.version >= 4); |
17292 | break; | |
17293 | case language_ada: | |
17294 | case language_m2: | |
17295 | case language_pascal: | |
729efb13 | 17296 | low.data.const_val = 1; |
4fae6e18 JK |
17297 | low_default_is_valid = (cu->header.version >= 4); |
17298 | break; | |
17299 | default: | |
729efb13 | 17300 | low.data.const_val = 0; |
4fae6e18 JK |
17301 | low_default_is_valid = 0; |
17302 | break; | |
a02abb62 JB |
17303 | } |
17304 | ||
e142c38c | 17305 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 17306 | if (attr != nullptr) |
9a49df9d | 17307 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 17308 | else if (!low_default_is_valid) |
b98664d3 | 17309 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
17310 | "- DIE at %s [in module %s]"), |
17311 | sect_offset_str (die->sect_off), | |
518817b3 | 17312 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
a02abb62 | 17313 | |
506f5c41 TV |
17314 | struct attribute *attr_ub, *attr_count; |
17315 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 17316 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 17317 | { |
506f5c41 | 17318 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 17319 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 17320 | { |
c451ebe5 SA |
17321 | /* If bounds are constant do the final calculation here. */ |
17322 | if (low.kind == PROP_CONST && high.kind == PROP_CONST) | |
17323 | high.data.const_val = low.data.const_val + high.data.const_val - 1; | |
17324 | else | |
17325 | high_bound_is_count = 1; | |
c2ff108b | 17326 | } |
506f5c41 TV |
17327 | else |
17328 | { | |
17329 | if (attr_ub != NULL) | |
17330 | complaint (_("Unresolved DW_AT_upper_bound " | |
17331 | "- DIE at %s [in module %s]"), | |
17332 | sect_offset_str (die->sect_off), | |
17333 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17334 | if (attr_count != NULL) | |
17335 | complaint (_("Unresolved DW_AT_count " | |
17336 | "- DIE at %s [in module %s]"), | |
17337 | sect_offset_str (die->sect_off), | |
17338 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17339 | } | |
e77813c8 | 17340 | } |
a02abb62 | 17341 | |
4e962e74 TT |
17342 | LONGEST bias = 0; |
17343 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
cd6c91b4 | 17344 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
4e962e74 TT |
17345 | bias = dwarf2_get_attr_constant_value (bias_attr, 0); |
17346 | ||
dbb9c2b1 JB |
17347 | /* Normally, the DWARF producers are expected to use a signed |
17348 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
17349 | But this is unfortunately not always the case, as witnessed | |
17350 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
17351 | is used instead. To work around that ambiguity, we treat | |
17352 | the bounds as signed, and thus sign-extend their values, when | |
17353 | the base type is signed. */ | |
6e70227d | 17354 | negative_mask = |
d359392f | 17355 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
729efb13 SA |
17356 | if (low.kind == PROP_CONST |
17357 | && !TYPE_UNSIGNED (base_type) && (low.data.const_val & negative_mask)) | |
17358 | low.data.const_val |= negative_mask; | |
17359 | if (high.kind == PROP_CONST | |
17360 | && !TYPE_UNSIGNED (base_type) && (high.data.const_val & negative_mask)) | |
17361 | high.data.const_val |= negative_mask; | |
43bbcdc2 | 17362 | |
5bbd8269 AB |
17363 | /* Check for bit and byte strides. */ |
17364 | struct dynamic_prop byte_stride_prop; | |
17365 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
17366 | if (attr_byte_stride != nullptr) | |
17367 | { | |
09ba997f | 17368 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17369 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
17370 | prop_type); | |
17371 | } | |
17372 | ||
17373 | struct dynamic_prop bit_stride_prop; | |
17374 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
17375 | if (attr_bit_stride != nullptr) | |
17376 | { | |
17377 | /* It only makes sense to have either a bit or byte stride. */ | |
17378 | if (attr_byte_stride != nullptr) | |
17379 | { | |
17380 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
17381 | "- DIE at %s [in module %s]"), | |
17382 | sect_offset_str (die->sect_off), | |
17383 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); | |
17384 | attr_bit_stride = nullptr; | |
17385 | } | |
17386 | else | |
17387 | { | |
09ba997f | 17388 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
5bbd8269 AB |
17389 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
17390 | prop_type); | |
17391 | } | |
17392 | } | |
17393 | ||
17394 | if (attr_byte_stride != nullptr | |
17395 | || attr_bit_stride != nullptr) | |
17396 | { | |
17397 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
17398 | struct dynamic_prop *stride | |
17399 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
17400 | ||
17401 | range_type | |
17402 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
17403 | &high, bias, stride, byte_stride_p); | |
17404 | } | |
17405 | else | |
17406 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 17407 | |
c451ebe5 SA |
17408 | if (high_bound_is_count) |
17409 | TYPE_RANGE_DATA (range_type)->flag_upper_bound_is_count = 1; | |
17410 | ||
c2ff108b JK |
17411 | /* Ada expects an empty array on no boundary attributes. */ |
17412 | if (attr == NULL && cu->language != language_ada) | |
729efb13 | 17413 | TYPE_HIGH_BOUND_KIND (range_type) = PROP_UNDEFINED; |
c2ff108b | 17414 | |
39cbfefa DJ |
17415 | name = dwarf2_name (die, cu); |
17416 | if (name) | |
17417 | TYPE_NAME (range_type) = name; | |
6e70227d | 17418 | |
e142c38c | 17419 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17420 | if (attr != nullptr) |
a02abb62 JB |
17421 | TYPE_LENGTH (range_type) = DW_UNSND (attr); |
17422 | ||
2b4424c3 TT |
17423 | maybe_set_alignment (cu, die, range_type); |
17424 | ||
7e314c57 JK |
17425 | set_die_type (die, range_type, cu); |
17426 | ||
17427 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
17428 | set_descriptive_type (range_type, die, cu); |
17429 | ||
7e314c57 | 17430 | return range_type; |
a02abb62 | 17431 | } |
6e70227d | 17432 | |
f792889a | 17433 | static struct type * |
81a17f79 JB |
17434 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
17435 | { | |
17436 | struct type *type; | |
81a17f79 | 17437 | |
518817b3 SM |
17438 | type = init_type (cu->per_cu->dwarf2_per_objfile->objfile, TYPE_CODE_VOID,0, |
17439 | NULL); | |
0114d602 | 17440 | TYPE_NAME (type) = dwarf2_name (die, cu); |
81a17f79 | 17441 | |
74a2f8ff | 17442 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 17443 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
17444 | such a type, we treat it as a stub, and try to resolve it later on, |
17445 | when needed. */ | |
17446 | if (cu->language == language_ada) | |
17447 | TYPE_STUB (type) = 1; | |
17448 | ||
f792889a | 17449 | return set_die_type (die, type, cu); |
81a17f79 | 17450 | } |
a02abb62 | 17451 | |
639d11d3 DC |
17452 | /* Read a single die and all its descendents. Set the die's sibling |
17453 | field to NULL; set other fields in the die correctly, and set all | |
17454 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
17455 | location of the info_ptr after reading all of those dies. PARENT | |
17456 | is the parent of the die in question. */ | |
17457 | ||
17458 | static struct die_info * | |
dee91e82 | 17459 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
17460 | const gdb_byte *info_ptr, |
17461 | const gdb_byte **new_info_ptr, | |
dee91e82 | 17462 | struct die_info *parent) |
639d11d3 DC |
17463 | { |
17464 | struct die_info *die; | |
d521ce57 | 17465 | const gdb_byte *cur_ptr; |
639d11d3 | 17466 | |
3e225074 | 17467 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
1d325ec1 DJ |
17468 | if (die == NULL) |
17469 | { | |
17470 | *new_info_ptr = cur_ptr; | |
17471 | return NULL; | |
17472 | } | |
93311388 | 17473 | store_in_ref_table (die, reader->cu); |
639d11d3 | 17474 | |
3e225074 | 17475 | if (die->has_children) |
bf6af496 | 17476 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
17477 | else |
17478 | { | |
17479 | die->child = NULL; | |
17480 | *new_info_ptr = cur_ptr; | |
17481 | } | |
17482 | ||
17483 | die->sibling = NULL; | |
17484 | die->parent = parent; | |
17485 | return die; | |
17486 | } | |
17487 | ||
17488 | /* Read a die, all of its descendents, and all of its siblings; set | |
17489 | all of the fields of all of the dies correctly. Arguments are as | |
17490 | in read_die_and_children. */ | |
17491 | ||
17492 | static struct die_info * | |
bf6af496 | 17493 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
17494 | const gdb_byte *info_ptr, |
17495 | const gdb_byte **new_info_ptr, | |
bf6af496 | 17496 | struct die_info *parent) |
639d11d3 DC |
17497 | { |
17498 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 17499 | const gdb_byte *cur_ptr; |
639d11d3 | 17500 | |
c906108c | 17501 | cur_ptr = info_ptr; |
639d11d3 DC |
17502 | first_die = last_sibling = NULL; |
17503 | ||
17504 | while (1) | |
c906108c | 17505 | { |
639d11d3 | 17506 | struct die_info *die |
dee91e82 | 17507 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 17508 | |
1d325ec1 | 17509 | if (die == NULL) |
c906108c | 17510 | { |
639d11d3 DC |
17511 | *new_info_ptr = cur_ptr; |
17512 | return first_die; | |
c906108c | 17513 | } |
1d325ec1 DJ |
17514 | |
17515 | if (!first_die) | |
17516 | first_die = die; | |
c906108c | 17517 | else |
1d325ec1 DJ |
17518 | last_sibling->sibling = die; |
17519 | ||
17520 | last_sibling = die; | |
c906108c | 17521 | } |
c906108c SS |
17522 | } |
17523 | ||
bf6af496 DE |
17524 | /* Read a die, all of its descendents, and all of its siblings; set |
17525 | all of the fields of all of the dies correctly. Arguments are as | |
17526 | in read_die_and_children. | |
17527 | This the main entry point for reading a DIE and all its children. */ | |
17528 | ||
17529 | static struct die_info * | |
17530 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
17531 | const gdb_byte *info_ptr, |
17532 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
17533 | struct die_info *parent) |
17534 | { | |
17535 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
17536 | new_info_ptr, parent); | |
17537 | ||
b4f54984 | 17538 | if (dwarf_die_debug) |
bf6af496 DE |
17539 | { |
17540 | fprintf_unfiltered (gdb_stdlog, | |
17541 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17542 | reader->die_section->get_name (), |
bf6af496 DE |
17543 | (unsigned) (info_ptr - reader->die_section->buffer), |
17544 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17545 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
17546 | } |
17547 | ||
17548 | return die; | |
17549 | } | |
17550 | ||
3019eac3 DE |
17551 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
17552 | attributes. | |
17553 | The caller is responsible for filling in the extra attributes | |
17554 | and updating (*DIEP)->num_attrs. | |
17555 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17556 | except for its child, sibling, and parent fields. */ |
93311388 | 17557 | |
d521ce57 | 17558 | static const gdb_byte * |
3019eac3 | 17559 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 17560 | struct die_info **diep, const gdb_byte *info_ptr, |
3e225074 | 17561 | int num_extra_attrs) |
93311388 | 17562 | { |
b64f50a1 | 17563 | unsigned int abbrev_number, bytes_read, i; |
93311388 DE |
17564 | struct abbrev_info *abbrev; |
17565 | struct die_info *die; | |
17566 | struct dwarf2_cu *cu = reader->cu; | |
17567 | bfd *abfd = reader->abfd; | |
17568 | ||
9c541725 | 17569 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
17570 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
17571 | info_ptr += bytes_read; | |
17572 | if (!abbrev_number) | |
17573 | { | |
17574 | *diep = NULL; | |
93311388 DE |
17575 | return info_ptr; |
17576 | } | |
17577 | ||
685af9cd | 17578 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 17579 | if (!abbrev) |
348e048f DE |
17580 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
17581 | abbrev_number, | |
17582 | bfd_get_filename (abfd)); | |
17583 | ||
3019eac3 | 17584 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 17585 | die->sect_off = sect_off; |
93311388 DE |
17586 | die->tag = abbrev->tag; |
17587 | die->abbrev = abbrev_number; | |
3e225074 | 17588 | die->has_children = abbrev->has_children; |
93311388 | 17589 | |
3019eac3 DE |
17590 | /* Make the result usable. |
17591 | The caller needs to update num_attrs after adding the extra | |
17592 | attributes. */ | |
93311388 DE |
17593 | die->num_attrs = abbrev->num_attrs; |
17594 | ||
18a8505e | 17595 | std::vector<int> indexes_that_need_reprocess; |
93311388 | 17596 | for (i = 0; i < abbrev->num_attrs; ++i) |
18a8505e AT |
17597 | { |
17598 | bool need_reprocess; | |
17599 | info_ptr = | |
17600 | read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], | |
17601 | info_ptr, &need_reprocess); | |
17602 | if (need_reprocess) | |
17603 | indexes_that_need_reprocess.push_back (i); | |
17604 | } | |
17605 | ||
17606 | struct attribute *attr = dwarf2_attr_no_follow (die, DW_AT_str_offsets_base); | |
17607 | if (attr != nullptr) | |
17608 | cu->str_offsets_base = DW_UNSND (attr); | |
93311388 | 17609 | |
18a8505e AT |
17610 | auto maybe_addr_base = lookup_addr_base(die); |
17611 | if (maybe_addr_base.has_value ()) | |
17612 | cu->addr_base = *maybe_addr_base; | |
17613 | for (int index : indexes_that_need_reprocess) | |
17614 | read_attribute_reprocess (reader, &die->attrs[index]); | |
93311388 | 17615 | *diep = die; |
93311388 DE |
17616 | return info_ptr; |
17617 | } | |
17618 | ||
3019eac3 DE |
17619 | /* Read a die and all its attributes. |
17620 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 17621 | except for its child, sibling, and parent fields. */ |
3019eac3 | 17622 | |
d521ce57 | 17623 | static const gdb_byte * |
3019eac3 | 17624 | read_full_die (const struct die_reader_specs *reader, |
3e225074 | 17625 | struct die_info **diep, const gdb_byte *info_ptr) |
3019eac3 | 17626 | { |
d521ce57 | 17627 | const gdb_byte *result; |
bf6af496 | 17628 | |
3e225074 | 17629 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
bf6af496 | 17630 | |
b4f54984 | 17631 | if (dwarf_die_debug) |
bf6af496 DE |
17632 | { |
17633 | fprintf_unfiltered (gdb_stdlog, | |
17634 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 17635 | reader->die_section->get_name (), |
bf6af496 DE |
17636 | (unsigned) (info_ptr - reader->die_section->buffer), |
17637 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 17638 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
17639 | } |
17640 | ||
17641 | return result; | |
3019eac3 | 17642 | } |
433df2d4 | 17643 | \f |
c906108c | 17644 | |
72bf9492 DJ |
17645 | /* Returns nonzero if TAG represents a type that we might generate a partial |
17646 | symbol for. */ | |
17647 | ||
17648 | static int | |
17649 | is_type_tag_for_partial (int tag) | |
17650 | { | |
17651 | switch (tag) | |
17652 | { | |
17653 | #if 0 | |
17654 | /* Some types that would be reasonable to generate partial symbols for, | |
17655 | that we don't at present. */ | |
17656 | case DW_TAG_array_type: | |
17657 | case DW_TAG_file_type: | |
17658 | case DW_TAG_ptr_to_member_type: | |
17659 | case DW_TAG_set_type: | |
17660 | case DW_TAG_string_type: | |
17661 | case DW_TAG_subroutine_type: | |
17662 | #endif | |
17663 | case DW_TAG_base_type: | |
17664 | case DW_TAG_class_type: | |
680b30c7 | 17665 | case DW_TAG_interface_type: |
72bf9492 DJ |
17666 | case DW_TAG_enumeration_type: |
17667 | case DW_TAG_structure_type: | |
17668 | case DW_TAG_subrange_type: | |
17669 | case DW_TAG_typedef: | |
17670 | case DW_TAG_union_type: | |
17671 | return 1; | |
17672 | default: | |
17673 | return 0; | |
17674 | } | |
17675 | } | |
17676 | ||
17677 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
17678 | ||
17679 | static struct partial_die_info * | |
dee91e82 | 17680 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 17681 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 17682 | { |
dee91e82 | 17683 | struct dwarf2_cu *cu = reader->cu; |
518817b3 | 17684 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
72bf9492 | 17685 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 17686 | unsigned int bytes_read; |
5afb4e99 | 17687 | unsigned int load_all = 0; |
72bf9492 DJ |
17688 | int nesting_level = 1; |
17689 | ||
17690 | parent_die = NULL; | |
17691 | last_die = NULL; | |
17692 | ||
7adf1e79 DE |
17693 | gdb_assert (cu->per_cu != NULL); |
17694 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
17695 | load_all = 1; |
17696 | ||
72bf9492 DJ |
17697 | cu->partial_dies |
17698 | = htab_create_alloc_ex (cu->header.length / 12, | |
17699 | partial_die_hash, | |
17700 | partial_die_eq, | |
17701 | NULL, | |
17702 | &cu->comp_unit_obstack, | |
17703 | hashtab_obstack_allocate, | |
17704 | dummy_obstack_deallocate); | |
17705 | ||
72bf9492 DJ |
17706 | while (1) |
17707 | { | |
685af9cd | 17708 | abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, &bytes_read); |
72bf9492 DJ |
17709 | |
17710 | /* A NULL abbrev means the end of a series of children. */ | |
17711 | if (abbrev == NULL) | |
17712 | { | |
17713 | if (--nesting_level == 0) | |
cd9983dd YQ |
17714 | return first_die; |
17715 | ||
72bf9492 DJ |
17716 | info_ptr += bytes_read; |
17717 | last_die = parent_die; | |
17718 | parent_die = parent_die->die_parent; | |
17719 | continue; | |
17720 | } | |
17721 | ||
98bfdba5 PA |
17722 | /* Check for template arguments. We never save these; if |
17723 | they're seen, we just mark the parent, and go on our way. */ | |
17724 | if (parent_die != NULL | |
17725 | && cu->language == language_cplus | |
17726 | && (abbrev->tag == DW_TAG_template_type_param | |
17727 | || abbrev->tag == DW_TAG_template_value_param)) | |
17728 | { | |
17729 | parent_die->has_template_arguments = 1; | |
17730 | ||
17731 | if (!load_all) | |
17732 | { | |
17733 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 17734 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
17735 | continue; |
17736 | } | |
17737 | } | |
17738 | ||
0d99eb77 | 17739 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
17740 | Skip their other children. */ |
17741 | if (!load_all | |
17742 | && cu->language == language_cplus | |
17743 | && parent_die != NULL | |
17744 | && parent_die->tag == DW_TAG_subprogram) | |
17745 | { | |
dee91e82 | 17746 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
17747 | continue; |
17748 | } | |
17749 | ||
5afb4e99 DJ |
17750 | /* Check whether this DIE is interesting enough to save. Normally |
17751 | we would not be interested in members here, but there may be | |
17752 | later variables referencing them via DW_AT_specification (for | |
17753 | static members). */ | |
17754 | if (!load_all | |
17755 | && !is_type_tag_for_partial (abbrev->tag) | |
72929c62 | 17756 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
17757 | && abbrev->tag != DW_TAG_enumerator |
17758 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 17759 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 17760 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 17761 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 17762 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 17763 | && abbrev->tag != DW_TAG_module |
95554aad | 17764 | && abbrev->tag != DW_TAG_member |
74921315 KS |
17765 | && abbrev->tag != DW_TAG_imported_unit |
17766 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
17767 | { |
17768 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17769 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
17770 | continue; |
17771 | } | |
17772 | ||
6f06d47b YQ |
17773 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
17774 | abbrev); | |
cd9983dd | 17775 | |
48fbe735 | 17776 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
17777 | |
17778 | /* This two-pass algorithm for processing partial symbols has a | |
17779 | high cost in cache pressure. Thus, handle some simple cases | |
17780 | here which cover the majority of C partial symbols. DIEs | |
17781 | which neither have specification tags in them, nor could have | |
17782 | specification tags elsewhere pointing at them, can simply be | |
17783 | processed and discarded. | |
17784 | ||
17785 | This segment is also optional; scan_partial_symbols and | |
17786 | add_partial_symbol will handle these DIEs if we chain | |
17787 | them in normally. When compilers which do not emit large | |
17788 | quantities of duplicate debug information are more common, | |
17789 | this code can probably be removed. */ | |
17790 | ||
17791 | /* Any complete simple types at the top level (pretty much all | |
17792 | of them, for a language without namespaces), can be processed | |
17793 | directly. */ | |
17794 | if (parent_die == NULL | |
cd9983dd YQ |
17795 | && pdi.has_specification == 0 |
17796 | && pdi.is_declaration == 0 | |
17797 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
17798 | || pdi.tag == DW_TAG_base_type | |
17799 | || pdi.tag == DW_TAG_subrange_type)) | |
72bf9492 | 17800 | { |
cd9983dd | 17801 | if (building_psymtab && pdi.name != NULL) |
31edb802 | 17802 | add_psymbol_to_list (pdi.name, false, |
79748972 | 17803 | VAR_DOMAIN, LOC_TYPEDEF, -1, |
75aedd27 | 17804 | psymbol_placement::STATIC, |
1762568f | 17805 | 0, cu->language, objfile); |
cd9983dd | 17806 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
17807 | continue; |
17808 | } | |
17809 | ||
d8228535 JK |
17810 | /* The exception for DW_TAG_typedef with has_children above is |
17811 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 17812 | type_name_or_error will error on such types later. |
d8228535 JK |
17813 | |
17814 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
17815 | it could not find the child DIEs referenced later, this is checked | |
17816 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
17817 | ||
cd9983dd | 17818 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 17819 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 17820 | "- DIE at %s [in module %s]"), |
cd9983dd | 17821 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 17822 | |
72bf9492 DJ |
17823 | /* If we're at the second level, and we're an enumerator, and |
17824 | our parent has no specification (meaning possibly lives in a | |
17825 | namespace elsewhere), then we can add the partial symbol now | |
17826 | instead of queueing it. */ | |
cd9983dd | 17827 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
17828 | && parent_die != NULL |
17829 | && parent_die->die_parent == NULL | |
17830 | && parent_die->tag == DW_TAG_enumeration_type | |
17831 | && parent_die->has_specification == 0) | |
17832 | { | |
cd9983dd | 17833 | if (pdi.name == NULL) |
b98664d3 | 17834 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 17835 | else if (building_psymtab) |
31edb802 | 17836 | add_psymbol_to_list (pdi.name, false, |
79748972 | 17837 | VAR_DOMAIN, LOC_CONST, -1, |
9c37b5ae | 17838 | cu->language == language_cplus |
75aedd27 TT |
17839 | ? psymbol_placement::GLOBAL |
17840 | : psymbol_placement::STATIC, | |
1762568f | 17841 | 0, cu->language, objfile); |
72bf9492 | 17842 | |
cd9983dd | 17843 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
17844 | continue; |
17845 | } | |
17846 | ||
cd9983dd | 17847 | struct partial_die_info *part_die |
6f06d47b | 17848 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 17849 | |
72bf9492 DJ |
17850 | /* We'll save this DIE so link it in. */ |
17851 | part_die->die_parent = parent_die; | |
17852 | part_die->die_sibling = NULL; | |
17853 | part_die->die_child = NULL; | |
17854 | ||
17855 | if (last_die && last_die == parent_die) | |
17856 | last_die->die_child = part_die; | |
17857 | else if (last_die) | |
17858 | last_die->die_sibling = part_die; | |
17859 | ||
17860 | last_die = part_die; | |
17861 | ||
17862 | if (first_die == NULL) | |
17863 | first_die = part_die; | |
17864 | ||
17865 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
17866 | find interesting need to be in the hash table, because we | |
17867 | also have the parent/sibling/child chains; only those that we | |
17868 | might refer to by offset later during partial symbol reading. | |
17869 | ||
17870 | For now this means things that might have be the target of a | |
17871 | DW_AT_specification, DW_AT_abstract_origin, or | |
17872 | DW_AT_extension. DW_AT_extension will refer only to | |
17873 | namespaces; DW_AT_abstract_origin refers to functions (and | |
17874 | many things under the function DIE, but we do not recurse | |
17875 | into function DIEs during partial symbol reading) and | |
17876 | possibly variables as well; DW_AT_specification refers to | |
17877 | declarations. Declarations ought to have the DW_AT_declaration | |
17878 | flag. It happens that GCC forgets to put it in sometimes, but | |
17879 | only for functions, not for types. | |
17880 | ||
17881 | Adding more things than necessary to the hash table is harmless | |
17882 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
17883 | wasted time in find_partial_die, when we reread the compilation |
17884 | unit with load_all_dies set. */ | |
72bf9492 | 17885 | |
5afb4e99 | 17886 | if (load_all |
72929c62 | 17887 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 17888 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
17889 | || abbrev->tag == DW_TAG_variable |
17890 | || abbrev->tag == DW_TAG_namespace | |
17891 | || part_die->is_declaration) | |
17892 | { | |
17893 | void **slot; | |
17894 | ||
17895 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
17896 | to_underlying (part_die->sect_off), |
17897 | INSERT); | |
72bf9492 DJ |
17898 | *slot = part_die; |
17899 | } | |
17900 | ||
72bf9492 | 17901 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 17902 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
17903 | languages we have to, so that we can get at method physnames |
17904 | to infer fully qualified class names, for DW_AT_specification, | |
17905 | and for C++ template arguments. For C++, we also look one level | |
17906 | inside functions to find template arguments (if the name of the | |
17907 | function does not already contain the template arguments). | |
bc30ff58 | 17908 | |
0a4b0913 AB |
17909 | For Ada and Fortran, we need to scan the children of subprograms |
17910 | and lexical blocks as well because these languages allow the | |
17911 | definition of nested entities that could be interesting for the | |
17912 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 17913 | if (last_die->has_children |
5afb4e99 DJ |
17914 | && (load_all |
17915 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 17916 | || last_die->tag == DW_TAG_module |
72bf9492 | 17917 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
17918 | || (cu->language == language_cplus |
17919 | && last_die->tag == DW_TAG_subprogram | |
17920 | && (last_die->name == NULL | |
17921 | || strchr (last_die->name, '<') == NULL)) | |
72bf9492 DJ |
17922 | || (cu->language != language_c |
17923 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 17924 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 17925 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 17926 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
17927 | || ((cu->language == language_ada |
17928 | || cu->language == language_fortran) | |
bc30ff58 JB |
17929 | && (last_die->tag == DW_TAG_subprogram |
17930 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
17931 | { |
17932 | nesting_level++; | |
17933 | parent_die = last_die; | |
17934 | continue; | |
17935 | } | |
17936 | ||
17937 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 17938 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
17939 | |
17940 | /* Back to the top, do it again. */ | |
17941 | } | |
17942 | } | |
17943 | ||
6f06d47b YQ |
17944 | partial_die_info::partial_die_info (sect_offset sect_off_, |
17945 | struct abbrev_info *abbrev) | |
17946 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) | |
17947 | { | |
17948 | } | |
17949 | ||
35cc7ed7 YQ |
17950 | /* Read a minimal amount of information into the minimal die structure. |
17951 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 17952 | |
48fbe735 YQ |
17953 | const gdb_byte * |
17954 | partial_die_info::read (const struct die_reader_specs *reader, | |
17955 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 17956 | { |
dee91e82 | 17957 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
17958 | struct dwarf2_per_objfile *dwarf2_per_objfile |
17959 | = cu->per_cu->dwarf2_per_objfile; | |
fa238c03 | 17960 | unsigned int i; |
c5aa993b | 17961 | int has_low_pc_attr = 0; |
c906108c | 17962 | int has_high_pc_attr = 0; |
91da1414 | 17963 | int high_pc_relative = 0; |
c906108c | 17964 | |
18a8505e | 17965 | std::vector<struct attribute> attr_vec (abbrev.num_attrs); |
fd0a254f | 17966 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 17967 | { |
18a8505e AT |
17968 | bool need_reprocess; |
17969 | info_ptr = read_attribute (reader, &attr_vec[i], &abbrev.attrs[i], | |
17970 | info_ptr, &need_reprocess); | |
17971 | /* String and address offsets that need to do the reprocessing have | |
17972 | already been read at this point, so there is no need to wait until | |
17973 | the loop terminates to do the reprocessing. */ | |
17974 | if (need_reprocess) | |
17975 | read_attribute_reprocess (reader, &attr_vec[i]); | |
17976 | attribute &attr = attr_vec[i]; | |
c906108c | 17977 | /* Store the data if it is of an attribute we want to keep in a |
c5aa993b | 17978 | partial symbol table. */ |
c906108c SS |
17979 | switch (attr.name) |
17980 | { | |
17981 | case DW_AT_name: | |
48fbe735 | 17982 | switch (tag) |
71c25dea TT |
17983 | { |
17984 | case DW_TAG_compile_unit: | |
95554aad | 17985 | case DW_TAG_partial_unit: |
348e048f | 17986 | case DW_TAG_type_unit: |
71c25dea TT |
17987 | /* Compilation units have a DW_AT_name that is a filename, not |
17988 | a source language identifier. */ | |
17989 | case DW_TAG_enumeration_type: | |
17990 | case DW_TAG_enumerator: | |
17991 | /* These tags always have simple identifiers already; no need | |
17992 | to canonicalize them. */ | |
48fbe735 | 17993 | name = DW_STRING (&attr); |
71c25dea TT |
17994 | break; |
17995 | default: | |
48fbe735 YQ |
17996 | { |
17997 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
17998 | ||
17999 | name | |
be1e3d3e | 18000 | = dwarf2_canonicalize_name (DW_STRING (&attr), cu, objfile); |
48fbe735 | 18001 | } |
71c25dea TT |
18002 | break; |
18003 | } | |
c906108c | 18004 | break; |
31ef98ae | 18005 | case DW_AT_linkage_name: |
c906108c | 18006 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
18007 | /* Note that both forms of linkage name might appear. We |
18008 | assume they will be the same, and we only store the last | |
18009 | one we see. */ | |
48fbe735 | 18010 | linkage_name = DW_STRING (&attr); |
c906108c SS |
18011 | break; |
18012 | case DW_AT_low_pc: | |
18013 | has_low_pc_attr = 1; | |
cd6c91b4 | 18014 | lowpc = attr.value_as_address (); |
c906108c SS |
18015 | break; |
18016 | case DW_AT_high_pc: | |
18017 | has_high_pc_attr = 1; | |
cd6c91b4 TT |
18018 | highpc = attr.value_as_address (); |
18019 | if (cu->header.version >= 4 && attr.form_is_constant ()) | |
31aa7e4e | 18020 | high_pc_relative = 1; |
c906108c SS |
18021 | break; |
18022 | case DW_AT_location: | |
0963b4bd | 18023 | /* Support the .debug_loc offsets. */ |
4fc6c0d5 | 18024 | if (attr.form_is_block ()) |
8e19ed76 | 18025 | { |
48fbe735 | 18026 | d.locdesc = DW_BLOCK (&attr); |
8e19ed76 | 18027 | } |
cd6c91b4 | 18028 | else if (attr.form_is_section_offset ()) |
8e19ed76 | 18029 | { |
4d3c2250 | 18030 | dwarf2_complex_location_expr_complaint (); |
8e19ed76 PS |
18031 | } |
18032 | else | |
18033 | { | |
4d3c2250 KB |
18034 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
18035 | "partial symbol information"); | |
8e19ed76 | 18036 | } |
c906108c | 18037 | break; |
c906108c | 18038 | case DW_AT_external: |
48fbe735 | 18039 | is_external = DW_UNSND (&attr); |
c906108c SS |
18040 | break; |
18041 | case DW_AT_declaration: | |
48fbe735 | 18042 | is_declaration = DW_UNSND (&attr); |
c906108c SS |
18043 | break; |
18044 | case DW_AT_type: | |
48fbe735 | 18045 | has_type = 1; |
c906108c SS |
18046 | break; |
18047 | case DW_AT_abstract_origin: | |
18048 | case DW_AT_specification: | |
72bf9492 | 18049 | case DW_AT_extension: |
48fbe735 YQ |
18050 | has_specification = 1; |
18051 | spec_offset = dwarf2_get_ref_die_offset (&attr); | |
18052 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 | 18053 | || cu->per_cu->is_dwz); |
c906108c SS |
18054 | break; |
18055 | case DW_AT_sibling: | |
18056 | /* Ignore absolute siblings, they might point outside of | |
18057 | the current compile unit. */ | |
18058 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 18059 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 18060 | else |
b9502d3f | 18061 | { |
48fbe735 | 18062 | const gdb_byte *buffer = reader->buffer; |
9c541725 PA |
18063 | sect_offset off = dwarf2_get_ref_die_offset (&attr); |
18064 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); | |
b9502d3f WN |
18065 | |
18066 | if (sibling_ptr < info_ptr) | |
b98664d3 | 18067 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 18068 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 18069 | reader->die_section->overflow_complaint (); |
b9502d3f | 18070 | else |
48fbe735 | 18071 | sibling = sibling_ptr; |
b9502d3f | 18072 | } |
c906108c | 18073 | break; |
fa4028e9 | 18074 | case DW_AT_byte_size: |
48fbe735 | 18075 | has_byte_size = 1; |
fa4028e9 | 18076 | break; |
ff908ebf | 18077 | case DW_AT_const_value: |
48fbe735 | 18078 | has_const_value = 1; |
ff908ebf | 18079 | break; |
68511cec CES |
18080 | case DW_AT_calling_convention: |
18081 | /* DWARF doesn't provide a way to identify a program's source-level | |
18082 | entry point. DW_AT_calling_convention attributes are only meant | |
18083 | to describe functions' calling conventions. | |
18084 | ||
18085 | However, because it's a necessary piece of information in | |
0c1b455e TT |
18086 | Fortran, and before DWARF 4 DW_CC_program was the only |
18087 | piece of debugging information whose definition refers to | |
18088 | a 'main program' at all, several compilers marked Fortran | |
18089 | main programs with DW_CC_program --- even when those | |
18090 | functions use the standard calling conventions. | |
18091 | ||
18092 | Although DWARF now specifies a way to provide this | |
18093 | information, we support this practice for backward | |
18094 | compatibility. */ | |
68511cec | 18095 | if (DW_UNSND (&attr) == DW_CC_program |
0c1b455e | 18096 | && cu->language == language_fortran) |
48fbe735 | 18097 | main_subprogram = 1; |
68511cec | 18098 | break; |
481860b3 GB |
18099 | case DW_AT_inline: |
18100 | if (DW_UNSND (&attr) == DW_INL_inlined | |
18101 | || DW_UNSND (&attr) == DW_INL_declared_inlined) | |
48fbe735 | 18102 | may_be_inlined = 1; |
481860b3 | 18103 | break; |
95554aad TT |
18104 | |
18105 | case DW_AT_import: | |
48fbe735 | 18106 | if (tag == DW_TAG_imported_unit) |
36586728 | 18107 | { |
48fbe735 YQ |
18108 | d.sect_off = dwarf2_get_ref_die_offset (&attr); |
18109 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt | |
36586728 TT |
18110 | || cu->per_cu->is_dwz); |
18111 | } | |
95554aad TT |
18112 | break; |
18113 | ||
0c1b455e | 18114 | case DW_AT_main_subprogram: |
48fbe735 | 18115 | main_subprogram = DW_UNSND (&attr); |
0c1b455e TT |
18116 | break; |
18117 | ||
05caa1d2 TT |
18118 | case DW_AT_ranges: |
18119 | { | |
18120 | /* It would be nice to reuse dwarf2_get_pc_bounds here, | |
18121 | but that requires a full DIE, so instead we just | |
18122 | reimplement it. */ | |
18123 | int need_ranges_base = tag != DW_TAG_compile_unit; | |
18124 | unsigned int ranges_offset = (DW_UNSND (&attr) | |
18125 | + (need_ranges_base | |
18126 | ? cu->ranges_base | |
18127 | : 0)); | |
18128 | ||
18129 | /* Value of the DW_AT_ranges attribute is the offset in the | |
18130 | .debug_ranges section. */ | |
18131 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, | |
18132 | nullptr)) | |
18133 | has_pc_info = 1; | |
18134 | } | |
18135 | break; | |
18136 | ||
c906108c SS |
18137 | default: |
18138 | break; | |
18139 | } | |
18140 | } | |
18141 | ||
10d06d82 TT |
18142 | /* For Ada, if both the name and the linkage name appear, we prefer |
18143 | the latter. This lets "catch exception" work better, regardless | |
18144 | of the order in which the name and linkage name were emitted. | |
18145 | Really, though, this is just a workaround for the fact that gdb | |
18146 | doesn't store both the name and the linkage name. */ | |
18147 | if (cu->language == language_ada && linkage_name != nullptr) | |
18148 | name = linkage_name; | |
18149 | ||
91da1414 | 18150 | if (high_pc_relative) |
48fbe735 | 18151 | highpc += lowpc; |
91da1414 | 18152 | |
9373cf26 JK |
18153 | if (has_low_pc_attr && has_high_pc_attr) |
18154 | { | |
18155 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
18156 | eliminate duplicate copies of functions and vtables and such. | |
18157 | The linker will arbitrarily choose one and discard the others. | |
18158 | The AT_*_pc values for such functions refer to local labels in | |
18159 | these sections. If the section from that file was discarded, the | |
18160 | labels are not in the output, so the relocs get a value of 0. | |
18161 | If this is a discarded function, mark the pc bounds as invalid, | |
18162 | so that GDB will ignore it. */ | |
48fbe735 | 18163 | if (lowpc == 0 && !dwarf2_per_objfile->has_section_at_zero) |
9373cf26 | 18164 | { |
48fbe735 | 18165 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18166 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18167 | |
b98664d3 | 18168 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 18169 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18170 | paddress (gdbarch, lowpc), |
18171 | sect_offset_str (sect_off), | |
9d8780f0 | 18172 | objfile_name (objfile)); |
9373cf26 JK |
18173 | } |
18174 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 18175 | else if (lowpc >= highpc) |
9373cf26 | 18176 | { |
48fbe735 | 18177 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
bb5ed363 | 18178 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
9373cf26 | 18179 | |
b98664d3 | 18180 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 18181 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
18182 | paddress (gdbarch, lowpc), |
18183 | paddress (gdbarch, highpc), | |
18184 | sect_offset_str (sect_off), | |
9c541725 | 18185 | objfile_name (objfile)); |
9373cf26 JK |
18186 | } |
18187 | else | |
48fbe735 | 18188 | has_pc_info = 1; |
9373cf26 | 18189 | } |
85cbf3d3 | 18190 | |
c906108c SS |
18191 | return info_ptr; |
18192 | } | |
18193 | ||
72bf9492 DJ |
18194 | /* Find a cached partial DIE at OFFSET in CU. */ |
18195 | ||
d590ff25 YQ |
18196 | struct partial_die_info * |
18197 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
18198 | { |
18199 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 18200 | struct partial_die_info part_die (sect_off); |
72bf9492 | 18201 | |
9a3c8263 | 18202 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 18203 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 18204 | to_underlying (sect_off))); |
72bf9492 | 18205 | |
72bf9492 DJ |
18206 | return lookup_die; |
18207 | } | |
18208 | ||
348e048f DE |
18209 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
18210 | except in the case of .debug_types DIEs which do not reference | |
18211 | outside their CU (they do however referencing other types via | |
55f1336d | 18212 | DW_FORM_ref_sig8). */ |
72bf9492 | 18213 | |
122cf0f2 | 18214 | static const struct cu_partial_die_info |
9c541725 | 18215 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 18216 | { |
518817b3 SM |
18217 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18218 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18219 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
5afb4e99 DJ |
18220 | struct dwarf2_per_cu_data *per_cu = NULL; |
18221 | struct partial_die_info *pd = NULL; | |
72bf9492 | 18222 | |
36586728 | 18223 | if (offset_in_dwz == cu->per_cu->is_dwz |
4057dfde | 18224 | && cu->header.offset_in_cu_p (sect_off)) |
5afb4e99 | 18225 | { |
d590ff25 | 18226 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 18227 | if (pd != NULL) |
fb816e8b | 18228 | return { cu, pd }; |
0d99eb77 DE |
18229 | /* We missed recording what we needed. |
18230 | Load all dies and try again. */ | |
18231 | per_cu = cu->per_cu; | |
5afb4e99 | 18232 | } |
0d99eb77 DE |
18233 | else |
18234 | { | |
18235 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 18236 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 18237 | { |
9d8780f0 SM |
18238 | error (_("Dwarf Error: Type Unit at offset %s contains" |
18239 | " external reference to offset %s [in module %s].\n"), | |
18240 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
18241 | bfd_get_filename (objfile->obfd)); |
18242 | } | |
9c541725 | 18243 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 18244 | dwarf2_per_objfile); |
72bf9492 | 18245 | |
0d99eb77 DE |
18246 | if (per_cu->cu == NULL || per_cu->cu->partial_dies == NULL) |
18247 | load_partial_comp_unit (per_cu); | |
ae038cb0 | 18248 | |
0d99eb77 | 18249 | per_cu->cu->last_used = 0; |
d590ff25 | 18250 | pd = per_cu->cu->find_partial_die (sect_off); |
0d99eb77 | 18251 | } |
5afb4e99 | 18252 | |
dee91e82 DE |
18253 | /* If we didn't find it, and not all dies have been loaded, |
18254 | load them all and try again. */ | |
18255 | ||
5afb4e99 DJ |
18256 | if (pd == NULL && per_cu->load_all_dies == 0) |
18257 | { | |
5afb4e99 | 18258 | per_cu->load_all_dies = 1; |
fd820528 DE |
18259 | |
18260 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
18261 | THIS_CU->cu may already be in use. So we can't just free it and | |
18262 | replace its DIEs with the ones we read in. Instead, we leave those | |
18263 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
18264 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
18265 | set. */ | |
dee91e82 | 18266 | load_partial_comp_unit (per_cu); |
5afb4e99 | 18267 | |
d590ff25 | 18268 | pd = per_cu->cu->find_partial_die (sect_off); |
5afb4e99 DJ |
18269 | } |
18270 | ||
18271 | if (pd == NULL) | |
18272 | internal_error (__FILE__, __LINE__, | |
9d8780f0 | 18273 | _("could not find partial DIE %s " |
3e43a32a | 18274 | "in cache [from module %s]\n"), |
9d8780f0 | 18275 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
fb816e8b | 18276 | return { per_cu->cu, pd }; |
72bf9492 DJ |
18277 | } |
18278 | ||
abc72ce4 DE |
18279 | /* See if we can figure out if the class lives in a namespace. We do |
18280 | this by looking for a member function; its demangled name will | |
18281 | contain namespace info, if there is any. */ | |
18282 | ||
18283 | static void | |
18284 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
18285 | struct dwarf2_cu *cu) | |
18286 | { | |
18287 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
18288 | what template types look like, because the demangler | |
18289 | frequently doesn't give the same name as the debug info. We | |
18290 | could fix this by only using the demangled name to get the | |
18291 | prefix (but see comment in read_structure_type). */ | |
18292 | ||
18293 | struct partial_die_info *real_pdi; | |
18294 | struct partial_die_info *child_pdi; | |
18295 | ||
18296 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
18297 | we should not do this. We'll prepend the parent's fully qualified | |
18298 | name when we create the partial symbol. */ | |
18299 | ||
18300 | real_pdi = struct_pdi; | |
18301 | while (real_pdi->has_specification) | |
fb816e8b | 18302 | { |
122cf0f2 AB |
18303 | auto res = find_partial_die (real_pdi->spec_offset, |
18304 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
18305 | real_pdi = res.pdi; |
18306 | cu = res.cu; | |
18307 | } | |
abc72ce4 DE |
18308 | |
18309 | if (real_pdi->die_parent != NULL) | |
18310 | return; | |
18311 | ||
18312 | for (child_pdi = struct_pdi->die_child; | |
18313 | child_pdi != NULL; | |
18314 | child_pdi = child_pdi->die_sibling) | |
18315 | { | |
18316 | if (child_pdi->tag == DW_TAG_subprogram | |
18317 | && child_pdi->linkage_name != NULL) | |
18318 | { | |
43816ebc TT |
18319 | gdb::unique_xmalloc_ptr<char> actual_class_name |
18320 | (language_class_name_from_physname (cu->language_defn, | |
18321 | child_pdi->linkage_name)); | |
abc72ce4 DE |
18322 | if (actual_class_name != NULL) |
18323 | { | |
518817b3 | 18324 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 18325 | struct_pdi->name = objfile->intern (actual_class_name.get ()); |
abc72ce4 DE |
18326 | } |
18327 | break; | |
18328 | } | |
18329 | } | |
18330 | } | |
18331 | ||
52356b79 YQ |
18332 | void |
18333 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 18334 | { |
abc72ce4 DE |
18335 | /* Once we've fixed up a die, there's no point in doing so again. |
18336 | This also avoids a memory leak if we were to call | |
18337 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 18338 | if (fixup_called) |
abc72ce4 DE |
18339 | return; |
18340 | ||
72bf9492 DJ |
18341 | /* If we found a reference attribute and the DIE has no name, try |
18342 | to find a name in the referred to DIE. */ | |
18343 | ||
52356b79 | 18344 | if (name == NULL && has_specification) |
72bf9492 DJ |
18345 | { |
18346 | struct partial_die_info *spec_die; | |
72bf9492 | 18347 | |
122cf0f2 | 18348 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
18349 | spec_die = res.pdi; |
18350 | cu = res.cu; | |
72bf9492 | 18351 | |
52356b79 | 18352 | spec_die->fixup (cu); |
72bf9492 DJ |
18353 | |
18354 | if (spec_die->name) | |
18355 | { | |
52356b79 | 18356 | name = spec_die->name; |
72bf9492 DJ |
18357 | |
18358 | /* Copy DW_AT_external attribute if it is set. */ | |
18359 | if (spec_die->is_external) | |
52356b79 | 18360 | is_external = spec_die->is_external; |
72bf9492 DJ |
18361 | } |
18362 | } | |
18363 | ||
18364 | /* Set default names for some unnamed DIEs. */ | |
72bf9492 | 18365 | |
52356b79 YQ |
18366 | if (name == NULL && tag == DW_TAG_namespace) |
18367 | name = CP_ANONYMOUS_NAMESPACE_STR; | |
72bf9492 | 18368 | |
abc72ce4 DE |
18369 | /* If there is no parent die to provide a namespace, and there are |
18370 | children, see if we can determine the namespace from their linkage | |
122d1940 | 18371 | name. */ |
abc72ce4 | 18372 | if (cu->language == language_cplus |
fd5866f6 | 18373 | && !cu->per_cu->dwarf2_per_objfile->types.empty () |
52356b79 YQ |
18374 | && die_parent == NULL |
18375 | && has_children | |
18376 | && (tag == DW_TAG_class_type | |
18377 | || tag == DW_TAG_structure_type | |
18378 | || tag == DW_TAG_union_type)) | |
18379 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 18380 | |
53832f31 TT |
18381 | /* GCC might emit a nameless struct or union that has a linkage |
18382 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
52356b79 YQ |
18383 | if (name == NULL |
18384 | && (tag == DW_TAG_class_type | |
18385 | || tag == DW_TAG_interface_type | |
18386 | || tag == DW_TAG_structure_type | |
18387 | || tag == DW_TAG_union_type) | |
18388 | && linkage_name != NULL) | |
53832f31 | 18389 | { |
43816ebc TT |
18390 | gdb::unique_xmalloc_ptr<char> demangled |
18391 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
18392 | if (demangled != nullptr) | |
53832f31 | 18393 | { |
96408a79 SA |
18394 | const char *base; |
18395 | ||
18396 | /* Strip any leading namespaces/classes, keep only the base name. | |
18397 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
18398 | base = strrchr (demangled.get (), ':'); |
18399 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
18400 | base++; |
18401 | else | |
43816ebc | 18402 | base = demangled.get (); |
96408a79 | 18403 | |
518817b3 | 18404 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
be1e3d3e | 18405 | name = objfile->intern (base); |
53832f31 TT |
18406 | } |
18407 | } | |
18408 | ||
52356b79 | 18409 | fixup_called = 1; |
72bf9492 DJ |
18410 | } |
18411 | ||
18a8505e AT |
18412 | /* Process the attributes that had to be skipped in the first round. These |
18413 | attributes are the ones that need str_offsets_base or addr_base attributes. | |
18414 | They could not have been processed in the first round, because at the time | |
18415 | the values of str_offsets_base or addr_base may not have been known. */ | |
18416 | void read_attribute_reprocess (const struct die_reader_specs *reader, | |
18417 | struct attribute *attr) | |
18418 | { | |
18419 | struct dwarf2_cu *cu = reader->cu; | |
18420 | switch (attr->form) | |
18421 | { | |
18422 | case DW_FORM_addrx: | |
18423 | case DW_FORM_GNU_addr_index: | |
18424 | DW_ADDR (attr) = read_addr_index (cu, DW_UNSND (attr)); | |
18425 | break; | |
18426 | case DW_FORM_strx: | |
18427 | case DW_FORM_strx1: | |
18428 | case DW_FORM_strx2: | |
18429 | case DW_FORM_strx3: | |
18430 | case DW_FORM_strx4: | |
18431 | case DW_FORM_GNU_str_index: | |
18432 | { | |
18433 | unsigned int str_index = DW_UNSND (attr); | |
18434 | if (reader->dwo_file != NULL) | |
18435 | { | |
18436 | DW_STRING (attr) = read_dwo_str_index (reader, str_index); | |
18437 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18438 | } | |
18439 | else | |
18440 | { | |
18441 | DW_STRING (attr) = read_stub_str_index (cu, str_index); | |
18442 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18443 | } | |
18444 | break; | |
18445 | } | |
18446 | default: | |
18447 | gdb_assert_not_reached (_("Unexpected DWARF form.")); | |
18448 | } | |
18449 | } | |
18450 | ||
a8329558 | 18451 | /* Read an attribute value described by an attribute form. */ |
c906108c | 18452 | |
d521ce57 | 18453 | static const gdb_byte * |
dee91e82 DE |
18454 | read_attribute_value (const struct die_reader_specs *reader, |
18455 | struct attribute *attr, unsigned form, | |
18a8505e AT |
18456 | LONGEST implicit_const, const gdb_byte *info_ptr, |
18457 | bool *need_reprocess) | |
c906108c | 18458 | { |
dee91e82 | 18459 | struct dwarf2_cu *cu = reader->cu; |
518817b3 SM |
18460 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18461 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 18462 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 18463 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
dee91e82 | 18464 | bfd *abfd = reader->abfd; |
e7c27a73 | 18465 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
18466 | unsigned int bytes_read; |
18467 | struct dwarf_block *blk; | |
18a8505e | 18468 | *need_reprocess = false; |
c906108c | 18469 | |
aead7601 | 18470 | attr->form = (enum dwarf_form) form; |
a8329558 | 18471 | switch (form) |
c906108c | 18472 | { |
c906108c | 18473 | case DW_FORM_ref_addr: |
ae411497 | 18474 | if (cu->header.version == 2) |
c8a7a66f TT |
18475 | DW_UNSND (attr) = cu->header.read_address (abfd, info_ptr, |
18476 | &bytes_read); | |
ae411497 | 18477 | else |
8266302d TT |
18478 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, |
18479 | &bytes_read); | |
ae411497 TT |
18480 | info_ptr += bytes_read; |
18481 | break; | |
36586728 | 18482 | case DW_FORM_GNU_ref_alt: |
8266302d | 18483 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
36586728 TT |
18484 | info_ptr += bytes_read; |
18485 | break; | |
ae411497 | 18486 | case DW_FORM_addr: |
c8a7a66f | 18487 | DW_ADDR (attr) = cu->header.read_address (abfd, info_ptr, &bytes_read); |
3e29f34a | 18488 | DW_ADDR (attr) = gdbarch_adjust_dwarf2_addr (gdbarch, DW_ADDR (attr)); |
107d2387 | 18489 | info_ptr += bytes_read; |
c906108c SS |
18490 | break; |
18491 | case DW_FORM_block2: | |
7b5a2f43 | 18492 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18493 | blk->size = read_2_bytes (abfd, info_ptr); |
18494 | info_ptr += 2; | |
18495 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18496 | info_ptr += blk->size; | |
18497 | DW_BLOCK (attr) = blk; | |
18498 | break; | |
18499 | case DW_FORM_block4: | |
7b5a2f43 | 18500 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18501 | blk->size = read_4_bytes (abfd, info_ptr); |
18502 | info_ptr += 4; | |
18503 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18504 | info_ptr += blk->size; | |
18505 | DW_BLOCK (attr) = blk; | |
18506 | break; | |
18507 | case DW_FORM_data2: | |
18508 | DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); | |
18509 | info_ptr += 2; | |
18510 | break; | |
18511 | case DW_FORM_data4: | |
18512 | DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); | |
18513 | info_ptr += 4; | |
18514 | break; | |
18515 | case DW_FORM_data8: | |
18516 | DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); | |
18517 | info_ptr += 8; | |
18518 | break; | |
0224619f JK |
18519 | case DW_FORM_data16: |
18520 | blk = dwarf_alloc_block (cu); | |
18521 | blk->size = 16; | |
18522 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
18523 | info_ptr += 16; | |
18524 | DW_BLOCK (attr) = blk; | |
18525 | break; | |
2dc7f7b3 | 18526 | case DW_FORM_sec_offset: |
8266302d | 18527 | DW_UNSND (attr) = cu->header.read_offset (abfd, info_ptr, &bytes_read); |
2dc7f7b3 TT |
18528 | info_ptr += bytes_read; |
18529 | break; | |
c906108c | 18530 | case DW_FORM_string: |
9b1c24c8 | 18531 | DW_STRING (attr) = read_direct_string (abfd, info_ptr, &bytes_read); |
8285870a | 18532 | DW_STRING_IS_CANONICAL (attr) = 0; |
c906108c SS |
18533 | info_ptr += bytes_read; |
18534 | break; | |
4bdf3d34 | 18535 | case DW_FORM_strp: |
36586728 TT |
18536 | if (!cu->per_cu->is_dwz) |
18537 | { | |
ed2dc618 SM |
18538 | DW_STRING (attr) = read_indirect_string (dwarf2_per_objfile, |
18539 | abfd, info_ptr, cu_header, | |
36586728 TT |
18540 | &bytes_read); |
18541 | DW_STRING_IS_CANONICAL (attr) = 0; | |
18542 | info_ptr += bytes_read; | |
18543 | break; | |
18544 | } | |
18545 | /* FALLTHROUGH */ | |
43988095 JK |
18546 | case DW_FORM_line_strp: |
18547 | if (!cu->per_cu->is_dwz) | |
18548 | { | |
86c0bb4c TT |
18549 | DW_STRING (attr) |
18550 | = dwarf2_per_objfile->read_line_string (info_ptr, cu_header, | |
18551 | &bytes_read); | |
43988095 JK |
18552 | DW_STRING_IS_CANONICAL (attr) = 0; |
18553 | info_ptr += bytes_read; | |
18554 | break; | |
18555 | } | |
18556 | /* FALLTHROUGH */ | |
36586728 TT |
18557 | case DW_FORM_GNU_strp_alt: |
18558 | { | |
ed2dc618 | 18559 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
8266302d TT |
18560 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
18561 | &bytes_read); | |
36586728 | 18562 | |
0314b390 | 18563 | DW_STRING (attr) = dwz->read_string (objfile, str_offset); |
36586728 TT |
18564 | DW_STRING_IS_CANONICAL (attr) = 0; |
18565 | info_ptr += bytes_read; | |
18566 | } | |
4bdf3d34 | 18567 | break; |
2dc7f7b3 | 18568 | case DW_FORM_exprloc: |
c906108c | 18569 | case DW_FORM_block: |
7b5a2f43 | 18570 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18571 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18572 | info_ptr += bytes_read; | |
18573 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18574 | info_ptr += blk->size; | |
18575 | DW_BLOCK (attr) = blk; | |
18576 | break; | |
18577 | case DW_FORM_block1: | |
7b5a2f43 | 18578 | blk = dwarf_alloc_block (cu); |
c906108c SS |
18579 | blk->size = read_1_byte (abfd, info_ptr); |
18580 | info_ptr += 1; | |
18581 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
18582 | info_ptr += blk->size; | |
18583 | DW_BLOCK (attr) = blk; | |
18584 | break; | |
18585 | case DW_FORM_data1: | |
18586 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18587 | info_ptr += 1; | |
18588 | break; | |
18589 | case DW_FORM_flag: | |
18590 | DW_UNSND (attr) = read_1_byte (abfd, info_ptr); | |
18591 | info_ptr += 1; | |
18592 | break; | |
2dc7f7b3 TT |
18593 | case DW_FORM_flag_present: |
18594 | DW_UNSND (attr) = 1; | |
18595 | break; | |
c906108c SS |
18596 | case DW_FORM_sdata: |
18597 | DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18598 | info_ptr += bytes_read; | |
18599 | break; | |
18600 | case DW_FORM_udata: | |
18a8505e | 18601 | case DW_FORM_rnglistx: |
c906108c SS |
18602 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18603 | info_ptr += bytes_read; | |
18604 | break; | |
18605 | case DW_FORM_ref1: | |
9c541725 | 18606 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18607 | + read_1_byte (abfd, info_ptr)); |
c906108c SS |
18608 | info_ptr += 1; |
18609 | break; | |
18610 | case DW_FORM_ref2: | |
9c541725 | 18611 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18612 | + read_2_bytes (abfd, info_ptr)); |
c906108c SS |
18613 | info_ptr += 2; |
18614 | break; | |
18615 | case DW_FORM_ref4: | |
9c541725 | 18616 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18617 | + read_4_bytes (abfd, info_ptr)); |
c906108c SS |
18618 | info_ptr += 4; |
18619 | break; | |
613e1657 | 18620 | case DW_FORM_ref8: |
9c541725 | 18621 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18622 | + read_8_bytes (abfd, info_ptr)); |
613e1657 KB |
18623 | info_ptr += 8; |
18624 | break; | |
55f1336d | 18625 | case DW_FORM_ref_sig8: |
ac9ec31b | 18626 | DW_SIGNATURE (attr) = read_8_bytes (abfd, info_ptr); |
348e048f DE |
18627 | info_ptr += 8; |
18628 | break; | |
c906108c | 18629 | case DW_FORM_ref_udata: |
9c541725 | 18630 | DW_UNSND (attr) = (to_underlying (cu->header.sect_off) |
4568ecf9 | 18631 | + read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
18632 | info_ptr += bytes_read; |
18633 | break; | |
c906108c | 18634 | case DW_FORM_indirect: |
a8329558 KW |
18635 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18636 | info_ptr += bytes_read; | |
43988095 JK |
18637 | if (form == DW_FORM_implicit_const) |
18638 | { | |
18639 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
18640 | info_ptr += bytes_read; | |
18641 | } | |
18642 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
18a8505e | 18643 | info_ptr, need_reprocess); |
43988095 JK |
18644 | break; |
18645 | case DW_FORM_implicit_const: | |
18646 | DW_SND (attr) = implicit_const; | |
a8329558 | 18647 | break; |
336d760d | 18648 | case DW_FORM_addrx: |
3019eac3 | 18649 | case DW_FORM_GNU_addr_index: |
18a8505e AT |
18650 | *need_reprocess = true; |
18651 | DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
3019eac3 DE |
18652 | info_ptr += bytes_read; |
18653 | break; | |
cf532bd1 | 18654 | case DW_FORM_strx: |
15f18d14 AT |
18655 | case DW_FORM_strx1: |
18656 | case DW_FORM_strx2: | |
18657 | case DW_FORM_strx3: | |
18658 | case DW_FORM_strx4: | |
3019eac3 | 18659 | case DW_FORM_GNU_str_index: |
3019eac3 | 18660 | { |
15f18d14 AT |
18661 | ULONGEST str_index; |
18662 | if (form == DW_FORM_strx1) | |
18663 | { | |
18664 | str_index = read_1_byte (abfd, info_ptr); | |
18665 | info_ptr += 1; | |
18666 | } | |
18667 | else if (form == DW_FORM_strx2) | |
18668 | { | |
18669 | str_index = read_2_bytes (abfd, info_ptr); | |
18670 | info_ptr += 2; | |
18671 | } | |
18672 | else if (form == DW_FORM_strx3) | |
18673 | { | |
18674 | str_index = read_3_bytes (abfd, info_ptr); | |
18675 | info_ptr += 3; | |
18676 | } | |
18677 | else if (form == DW_FORM_strx4) | |
18678 | { | |
18679 | str_index = read_4_bytes (abfd, info_ptr); | |
18680 | info_ptr += 4; | |
18681 | } | |
18682 | else | |
18683 | { | |
18684 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
18685 | info_ptr += bytes_read; | |
18686 | } | |
18a8505e AT |
18687 | *need_reprocess = true; |
18688 | DW_UNSND (attr) = str_index; | |
18689 | } | |
3019eac3 | 18690 | break; |
c906108c | 18691 | default: |
8a3fe4f8 | 18692 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
18693 | dwarf_form_name (form), |
18694 | bfd_get_filename (abfd)); | |
c906108c | 18695 | } |
28e94949 | 18696 | |
36586728 | 18697 | /* Super hack. */ |
cd6c91b4 | 18698 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
36586728 TT |
18699 | attr->form = DW_FORM_GNU_ref_alt; |
18700 | ||
28e94949 JB |
18701 | /* We have seen instances where the compiler tried to emit a byte |
18702 | size attribute of -1 which ended up being encoded as an unsigned | |
18703 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
18704 | an object of this size seems pretty unlikely so we can relatively | |
18705 | safely treat these cases as if the size attribute was invalid and | |
18706 | treat them as zero by default. */ | |
18707 | if (attr->name == DW_AT_byte_size | |
18708 | && form == DW_FORM_data4 | |
18709 | && DW_UNSND (attr) >= 0xffffffff) | |
01c66ae6 JB |
18710 | { |
18711 | complaint | |
b98664d3 | 18712 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
43bbcdc2 | 18713 | hex_string (DW_UNSND (attr))); |
01c66ae6 JB |
18714 | DW_UNSND (attr) = 0; |
18715 | } | |
28e94949 | 18716 | |
c906108c SS |
18717 | return info_ptr; |
18718 | } | |
18719 | ||
a8329558 KW |
18720 | /* Read an attribute described by an abbreviated attribute. */ |
18721 | ||
d521ce57 | 18722 | static const gdb_byte * |
dee91e82 DE |
18723 | read_attribute (const struct die_reader_specs *reader, |
18724 | struct attribute *attr, struct attr_abbrev *abbrev, | |
18a8505e | 18725 | const gdb_byte *info_ptr, bool *need_reprocess) |
a8329558 KW |
18726 | { |
18727 | attr->name = abbrev->name; | |
43988095 | 18728 | return read_attribute_value (reader, attr, abbrev->form, |
18a8505e AT |
18729 | abbrev->implicit_const, info_ptr, |
18730 | need_reprocess); | |
a8329558 KW |
18731 | } |
18732 | ||
c764a876 DE |
18733 | /* Cover function for read_initial_length. |
18734 | Returns the length of the object at BUF, and stores the size of the | |
18735 | initial length in *BYTES_READ and stores the size that offsets will be in | |
18736 | *OFFSET_SIZE. | |
18737 | If the initial length size is not equivalent to that specified in | |
18738 | CU_HEADER then issue a complaint. | |
18739 | This is useful when reading non-comp-unit headers. */ | |
dd373385 | 18740 | |
c764a876 | 18741 | static LONGEST |
d521ce57 | 18742 | read_checked_initial_length_and_offset (bfd *abfd, const gdb_byte *buf, |
c764a876 DE |
18743 | const struct comp_unit_head *cu_header, |
18744 | unsigned int *bytes_read, | |
18745 | unsigned int *offset_size) | |
18746 | { | |
18747 | LONGEST length = read_initial_length (abfd, buf, bytes_read); | |
18748 | ||
18749 | gdb_assert (cu_header->initial_length_size == 4 | |
18750 | || cu_header->initial_length_size == 8 | |
18751 | || cu_header->initial_length_size == 12); | |
18752 | ||
18753 | if (cu_header->initial_length_size != *bytes_read) | |
b98664d3 | 18754 | complaint (_("intermixed 32-bit and 64-bit DWARF sections")); |
dd373385 | 18755 | |
c764a876 | 18756 | *offset_size = (*bytes_read == 4) ? 4 : 8; |
dd373385 | 18757 | return length; |
613e1657 KB |
18758 | } |
18759 | ||
43988095 JK |
18760 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ |
18761 | ||
18762 | static const char * | |
ed2dc618 | 18763 | read_indirect_string_at_offset (struct dwarf2_per_objfile *dwarf2_per_objfile, |
4f44ae6c | 18764 | LONGEST str_offset) |
43988095 | 18765 | { |
4f44ae6c TT |
18766 | return dwarf2_per_objfile->str.read_string (dwarf2_per_objfile->objfile, |
18767 | str_offset, "DW_FORM_strp"); | |
c906108c SS |
18768 | } |
18769 | ||
43988095 JK |
18770 | /* Return pointer to string at .debug_str offset as read from BUF. |
18771 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
18772 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
18773 | ||
d521ce57 | 18774 | static const char * |
ed2dc618 SM |
18775 | read_indirect_string (struct dwarf2_per_objfile *dwarf2_per_objfile, bfd *abfd, |
18776 | const gdb_byte *buf, | |
cf2c3c16 TT |
18777 | const struct comp_unit_head *cu_header, |
18778 | unsigned int *bytes_read_ptr) | |
18779 | { | |
8266302d | 18780 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
cf2c3c16 | 18781 | |
4f44ae6c | 18782 | return read_indirect_string_at_offset (dwarf2_per_objfile, str_offset); |
cf2c3c16 TT |
18783 | } |
18784 | ||
86c0bb4c | 18785 | /* See read.h. */ |
43988095 | 18786 | |
86c0bb4c TT |
18787 | const char * |
18788 | dwarf2_per_objfile::read_line_string (const gdb_byte *buf, | |
43988095 JK |
18789 | const struct comp_unit_head *cu_header, |
18790 | unsigned int *bytes_read_ptr) | |
18791 | { | |
86c0bb4c | 18792 | bfd *abfd = objfile->obfd; |
8266302d | 18793 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
43988095 | 18794 | |
86c0bb4c | 18795 | return line_str.read_string (objfile, str_offset, "DW_FORM_line_strp"); |
43988095 JK |
18796 | } |
18797 | ||
3019eac3 | 18798 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18a8505e | 18799 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
3019eac3 DE |
18800 | ADDR_SIZE is the size of addresses from the CU header. */ |
18801 | ||
18802 | static CORE_ADDR | |
ed2dc618 | 18803 | read_addr_index_1 (struct dwarf2_per_objfile *dwarf2_per_objfile, |
18a8505e AT |
18804 | unsigned int addr_index, gdb::optional<ULONGEST> addr_base, |
18805 | int addr_size) | |
3019eac3 DE |
18806 | { |
18807 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
18808 | bfd *abfd = objfile->obfd; | |
18809 | const gdb_byte *info_ptr; | |
18a8505e | 18810 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
3019eac3 | 18811 | |
96b79293 | 18812 | dwarf2_per_objfile->addr.read (objfile); |
3019eac3 DE |
18813 | if (dwarf2_per_objfile->addr.buffer == NULL) |
18814 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), | |
4262abfb | 18815 | objfile_name (objfile)); |
18a8505e AT |
18816 | if (addr_base_or_zero + addr_index * addr_size |
18817 | >= dwarf2_per_objfile->addr.size) | |
3019eac3 DE |
18818 | error (_("DW_FORM_addr_index pointing outside of " |
18819 | ".debug_addr section [in module %s]"), | |
4262abfb | 18820 | objfile_name (objfile)); |
3019eac3 | 18821 | info_ptr = (dwarf2_per_objfile->addr.buffer |
18a8505e | 18822 | + addr_base_or_zero + addr_index * addr_size); |
3019eac3 DE |
18823 | if (addr_size == 4) |
18824 | return bfd_get_32 (abfd, info_ptr); | |
18825 | else | |
18826 | return bfd_get_64 (abfd, info_ptr); | |
18827 | } | |
18828 | ||
18829 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
18830 | ||
18831 | static CORE_ADDR | |
18832 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
18833 | { | |
518817b3 SM |
18834 | return read_addr_index_1 (cu->per_cu->dwarf2_per_objfile, addr_index, |
18835 | cu->addr_base, cu->header.addr_size); | |
3019eac3 DE |
18836 | } |
18837 | ||
18838 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
18839 | ||
18840 | static CORE_ADDR | |
d521ce57 | 18841 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
18842 | unsigned int *bytes_read) |
18843 | { | |
518817b3 | 18844 | bfd *abfd = cu->per_cu->dwarf2_per_objfile->objfile->obfd; |
3019eac3 DE |
18845 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
18846 | ||
18847 | return read_addr_index (cu, addr_index); | |
18848 | } | |
18849 | ||
450a1bfc | 18850 | /* See read.h. */ |
3019eac3 DE |
18851 | |
18852 | CORE_ADDR | |
450a1bfc | 18853 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, unsigned int addr_index) |
3019eac3 | 18854 | { |
ed2dc618 | 18855 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
3019eac3 | 18856 | struct dwarf2_cu *cu = per_cu->cu; |
18a8505e | 18857 | gdb::optional<ULONGEST> addr_base; |
3019eac3 DE |
18858 | int addr_size; |
18859 | ||
3019eac3 DE |
18860 | /* We need addr_base and addr_size. |
18861 | If we don't have PER_CU->cu, we have to get it. | |
18862 | Nasty, but the alternative is storing the needed info in PER_CU, | |
18863 | which at this point doesn't seem justified: it's not clear how frequently | |
18864 | it would get used and it would increase the size of every PER_CU. | |
18865 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
18866 | so we're not in uncharted territory here. | |
18867 | Alas we need to be a bit more complicated as addr_base is contained | |
18868 | in the DIE. | |
18869 | ||
18870 | We don't need to read the entire CU(/TU). | |
18871 | We just need the header and top level die. | |
a1b64ce1 | 18872 | |
3019eac3 | 18873 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 18874 | For now we skip this optimization. */ |
3019eac3 DE |
18875 | |
18876 | if (cu != NULL) | |
18877 | { | |
18878 | addr_base = cu->addr_base; | |
18879 | addr_size = cu->header.addr_size; | |
18880 | } | |
18881 | else | |
18882 | { | |
6751ebae | 18883 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
18884 | addr_base = reader.cu->addr_base; |
18885 | addr_size = reader.cu->header.addr_size; | |
3019eac3 DE |
18886 | } |
18887 | ||
ed2dc618 SM |
18888 | return read_addr_index_1 (dwarf2_per_objfile, addr_index, addr_base, |
18889 | addr_size); | |
3019eac3 DE |
18890 | } |
18891 | ||
18a8505e AT |
18892 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
18893 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a | |
18894 | DWO file. */ | |
3019eac3 | 18895 | |
d521ce57 | 18896 | static const char * |
18a8505e AT |
18897 | read_str_index (struct dwarf2_cu *cu, |
18898 | struct dwarf2_section_info *str_section, | |
18899 | struct dwarf2_section_info *str_offsets_section, | |
18900 | ULONGEST str_offsets_base, ULONGEST str_index) | |
3019eac3 | 18901 | { |
518817b3 SM |
18902 | struct dwarf2_per_objfile *dwarf2_per_objfile |
18903 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 18904 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
c5164cbc | 18905 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 18906 | bfd *abfd = objfile->obfd; |
d521ce57 | 18907 | const gdb_byte *info_ptr; |
3019eac3 | 18908 | ULONGEST str_offset; |
cf532bd1 | 18909 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 18910 | |
96b79293 TT |
18911 | str_section->read (objfile); |
18912 | str_offsets_section->read (objfile); | |
73869dc2 | 18913 | if (str_section->buffer == NULL) |
18a8505e | 18914 | error (_("%s used without %s section" |
9d8780f0 | 18915 | " in CU at offset %s [in module %s]"), |
96b79293 | 18916 | form_name, str_section->get_name (), |
18a8505e | 18917 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 18918 | if (str_offsets_section->buffer == NULL) |
18a8505e | 18919 | error (_("%s used without %s section" |
9d8780f0 | 18920 | " in CU at offset %s [in module %s]"), |
96b79293 | 18921 | form_name, str_section->get_name (), |
18a8505e | 18922 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 18923 | info_ptr = (str_offsets_section->buffer |
18a8505e | 18924 | + str_offsets_base |
3019eac3 DE |
18925 | + str_index * cu->header.offset_size); |
18926 | if (cu->header.offset_size == 4) | |
18927 | str_offset = bfd_get_32 (abfd, info_ptr); | |
18928 | else | |
18929 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 18930 | if (str_offset >= str_section->size) |
57d63ce2 | 18931 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
18932 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
18933 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 18934 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
18935 | } |
18936 | ||
18a8505e AT |
18937 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
18938 | ||
18939 | static const char * | |
18940 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) | |
18941 | { | |
18942 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 | |
18943 | ? reader->cu->header.addr_size : 0; | |
18944 | return read_str_index (reader->cu, | |
18945 | &reader->dwo_file->sections.str, | |
18946 | &reader->dwo_file->sections.str_offsets, | |
18947 | str_offsets_base, str_index); | |
18948 | } | |
18949 | ||
18950 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ | |
18951 | ||
18952 | static const char * | |
18953 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) | |
18954 | { | |
18955 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; | |
18956 | const char *objf_name = objfile_name (objfile); | |
18957 | static const char form_name[] = "DW_FORM_GNU_str_index"; | |
18958 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; | |
18959 | ||
18960 | if (!cu->str_offsets_base.has_value ()) | |
18961 | error (_("%s used in Fission stub without %s" | |
18962 | " in CU at offset 0x%lx [in module %s]"), | |
18963 | form_name, str_offsets_attr_name, | |
18964 | (long) cu->header.offset_size, objf_name); | |
18965 | ||
18966 | return read_str_index (cu, | |
18967 | &cu->per_cu->dwarf2_per_objfile->str, | |
18968 | &cu->per_cu->dwarf2_per_objfile->str_offsets, | |
18969 | *cu->str_offsets_base, str_index); | |
18970 | } | |
18971 | ||
3019eac3 DE |
18972 | /* Return the length of an LEB128 number in BUF. */ |
18973 | ||
18974 | static int | |
18975 | leb128_size (const gdb_byte *buf) | |
18976 | { | |
18977 | const gdb_byte *begin = buf; | |
18978 | gdb_byte byte; | |
18979 | ||
18980 | while (1) | |
18981 | { | |
18982 | byte = *buf++; | |
18983 | if ((byte & 128) == 0) | |
18984 | return buf - begin; | |
18985 | } | |
18986 | } | |
18987 | ||
c906108c | 18988 | static void |
e142c38c | 18989 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
18990 | { |
18991 | switch (lang) | |
18992 | { | |
18993 | case DW_LANG_C89: | |
76bee0cc | 18994 | case DW_LANG_C99: |
0cfd832f | 18995 | case DW_LANG_C11: |
c906108c | 18996 | case DW_LANG_C: |
d1be3247 | 18997 | case DW_LANG_UPC: |
e142c38c | 18998 | cu->language = language_c; |
c906108c | 18999 | break; |
9c37b5ae | 19000 | case DW_LANG_Java: |
c906108c | 19001 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
19002 | case DW_LANG_C_plus_plus_11: |
19003 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 19004 | cu->language = language_cplus; |
c906108c | 19005 | break; |
6aecb9c2 JB |
19006 | case DW_LANG_D: |
19007 | cu->language = language_d; | |
19008 | break; | |
c906108c SS |
19009 | case DW_LANG_Fortran77: |
19010 | case DW_LANG_Fortran90: | |
b21b22e0 | 19011 | case DW_LANG_Fortran95: |
f7de9aab MW |
19012 | case DW_LANG_Fortran03: |
19013 | case DW_LANG_Fortran08: | |
e142c38c | 19014 | cu->language = language_fortran; |
c906108c | 19015 | break; |
a766d390 DE |
19016 | case DW_LANG_Go: |
19017 | cu->language = language_go; | |
19018 | break; | |
c906108c | 19019 | case DW_LANG_Mips_Assembler: |
e142c38c | 19020 | cu->language = language_asm; |
c906108c SS |
19021 | break; |
19022 | case DW_LANG_Ada83: | |
8aaf0b47 | 19023 | case DW_LANG_Ada95: |
bc5f45f8 JB |
19024 | cu->language = language_ada; |
19025 | break; | |
72019c9c GM |
19026 | case DW_LANG_Modula2: |
19027 | cu->language = language_m2; | |
19028 | break; | |
fe8e67fd PM |
19029 | case DW_LANG_Pascal83: |
19030 | cu->language = language_pascal; | |
19031 | break; | |
22566fbd DJ |
19032 | case DW_LANG_ObjC: |
19033 | cu->language = language_objc; | |
19034 | break; | |
c44af4eb TT |
19035 | case DW_LANG_Rust: |
19036 | case DW_LANG_Rust_old: | |
19037 | cu->language = language_rust; | |
19038 | break; | |
c906108c SS |
19039 | case DW_LANG_Cobol74: |
19040 | case DW_LANG_Cobol85: | |
c906108c | 19041 | default: |
e142c38c | 19042 | cu->language = language_minimal; |
c906108c SS |
19043 | break; |
19044 | } | |
e142c38c | 19045 | cu->language_defn = language_def (cu->language); |
c906108c SS |
19046 | } |
19047 | ||
19048 | /* Return the named attribute or NULL if not there. */ | |
19049 | ||
19050 | static struct attribute * | |
e142c38c | 19051 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 19052 | { |
a48e046c | 19053 | for (;;) |
c906108c | 19054 | { |
a48e046c TT |
19055 | unsigned int i; |
19056 | struct attribute *spec = NULL; | |
19057 | ||
19058 | for (i = 0; i < die->num_attrs; ++i) | |
19059 | { | |
19060 | if (die->attrs[i].name == name) | |
19061 | return &die->attrs[i]; | |
19062 | if (die->attrs[i].name == DW_AT_specification | |
19063 | || die->attrs[i].name == DW_AT_abstract_origin) | |
19064 | spec = &die->attrs[i]; | |
19065 | } | |
19066 | ||
19067 | if (!spec) | |
19068 | break; | |
c906108c | 19069 | |
f2f0e013 | 19070 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 19071 | } |
c5aa993b | 19072 | |
c906108c SS |
19073 | return NULL; |
19074 | } | |
19075 | ||
348e048f DE |
19076 | /* Return the named attribute or NULL if not there, |
19077 | but do not follow DW_AT_specification, etc. | |
19078 | This is for use in contexts where we're reading .debug_types dies. | |
19079 | Following DW_AT_specification, DW_AT_abstract_origin will take us | |
19080 | back up the chain, and we want to go down. */ | |
19081 | ||
19082 | static struct attribute * | |
45e58e77 | 19083 | dwarf2_attr_no_follow (struct die_info *die, unsigned int name) |
348e048f DE |
19084 | { |
19085 | unsigned int i; | |
19086 | ||
19087 | for (i = 0; i < die->num_attrs; ++i) | |
19088 | if (die->attrs[i].name == name) | |
19089 | return &die->attrs[i]; | |
19090 | ||
19091 | return NULL; | |
19092 | } | |
19093 | ||
7d45c7c3 KB |
19094 | /* Return the string associated with a string-typed attribute, or NULL if it |
19095 | is either not found or is of an incorrect type. */ | |
19096 | ||
19097 | static const char * | |
19098 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
19099 | { | |
19100 | struct attribute *attr; | |
19101 | const char *str = NULL; | |
19102 | ||
19103 | attr = dwarf2_attr (die, name, cu); | |
19104 | ||
19105 | if (attr != NULL) | |
19106 | { | |
43988095 | 19107 | if (attr->form == DW_FORM_strp || attr->form == DW_FORM_line_strp |
b3340438 | 19108 | || attr->form == DW_FORM_string |
cf532bd1 | 19109 | || attr->form == DW_FORM_strx |
8fe0f950 AT |
19110 | || attr->form == DW_FORM_strx1 |
19111 | || attr->form == DW_FORM_strx2 | |
19112 | || attr->form == DW_FORM_strx3 | |
19113 | || attr->form == DW_FORM_strx4 | |
b3340438 | 19114 | || attr->form == DW_FORM_GNU_str_index |
16eb6b2d | 19115 | || attr->form == DW_FORM_GNU_strp_alt) |
7d45c7c3 KB |
19116 | str = DW_STRING (attr); |
19117 | else | |
b98664d3 | 19118 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
19119 | "DIE at %s in module %s"), |
19120 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
518817b3 | 19121 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
7d45c7c3 KB |
19122 | } |
19123 | ||
19124 | return str; | |
19125 | } | |
19126 | ||
a084a2a6 | 19127 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 19128 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
19129 | static const char * |
19130 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
19131 | { | |
19132 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
19133 | if (dwo_name == nullptr) | |
19134 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
19135 | return dwo_name; | |
19136 | } | |
19137 | ||
05cf31d1 JB |
19138 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
19139 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 19140 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
19141 | |
19142 | static int | |
19143 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
19144 | { | |
19145 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
19146 | ||
19147 | return (attr && DW_UNSND (attr)); | |
19148 | } | |
19149 | ||
3ca72b44 | 19150 | static int |
e142c38c | 19151 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 19152 | { |
05cf31d1 JB |
19153 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
19154 | which value is non-zero. However, we have to be careful with | |
19155 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
19156 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
19157 | end up accidently finding a declaration attribute that belongs | |
19158 | to a different DIE referenced by the specification attribute, | |
19159 | even though the given DIE does not have a declaration attribute. */ | |
19160 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
19161 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
19162 | } |
19163 | ||
63d06c5c | 19164 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 19165 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
19166 | containing the return value on output. If there is no |
19167 | specification, but there is an abstract origin, that is | |
19168 | returned. */ | |
63d06c5c DC |
19169 | |
19170 | static struct die_info * | |
f2f0e013 | 19171 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 19172 | { |
f2f0e013 DJ |
19173 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
19174 | *spec_cu); | |
63d06c5c | 19175 | |
edb3359d DJ |
19176 | if (spec_attr == NULL) |
19177 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
19178 | ||
63d06c5c DC |
19179 | if (spec_attr == NULL) |
19180 | return NULL; | |
19181 | else | |
f2f0e013 | 19182 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 19183 | } |
c906108c | 19184 | |
527f3840 JK |
19185 | /* Stub for free_line_header to match void * callback types. */ |
19186 | ||
19187 | static void | |
19188 | free_line_header_voidp (void *arg) | |
19189 | { | |
9a3c8263 | 19190 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 19191 | |
fff8551c | 19192 | delete lh; |
527f3840 JK |
19193 | } |
19194 | ||
83769d0b | 19195 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
19196 | |
19197 | static struct dwarf2_section_info * | |
19198 | get_debug_line_section (struct dwarf2_cu *cu) | |
19199 | { | |
19200 | struct dwarf2_section_info *section; | |
518817b3 SM |
19201 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19202 | = cu->per_cu->dwarf2_per_objfile; | |
36586728 TT |
19203 | |
19204 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
19205 | DWO file. */ | |
19206 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
19207 | section = &cu->dwo_unit->dwo_file->sections.line; | |
19208 | else if (cu->per_cu->is_dwz) | |
19209 | { | |
ed2dc618 | 19210 | struct dwz_file *dwz = dwarf2_get_dwz_file (dwarf2_per_objfile); |
36586728 TT |
19211 | |
19212 | section = &dwz->line; | |
19213 | } | |
19214 | else | |
19215 | section = &dwarf2_per_objfile->line; | |
19216 | ||
19217 | return section; | |
19218 | } | |
19219 | ||
43988095 JK |
19220 | /* Read directory or file name entry format, starting with byte of |
19221 | format count entries, ULEB128 pairs of entry formats, ULEB128 of | |
19222 | entries count and the entries themselves in the described entry | |
19223 | format. */ | |
19224 | ||
19225 | static void | |
ed2dc618 SM |
19226 | read_formatted_entries (struct dwarf2_per_objfile *dwarf2_per_objfile, |
19227 | bfd *abfd, const gdb_byte **bufp, | |
43988095 JK |
19228 | struct line_header *lh, |
19229 | const struct comp_unit_head *cu_header, | |
19230 | void (*callback) (struct line_header *lh, | |
19231 | const char *name, | |
ecfb656c | 19232 | dir_index d_index, |
43988095 JK |
19233 | unsigned int mod_time, |
19234 | unsigned int length)) | |
19235 | { | |
19236 | gdb_byte format_count, formati; | |
19237 | ULONGEST data_count, datai; | |
19238 | const gdb_byte *buf = *bufp; | |
19239 | const gdb_byte *format_header_data; | |
43988095 JK |
19240 | unsigned int bytes_read; |
19241 | ||
19242 | format_count = read_1_byte (abfd, buf); | |
19243 | buf += 1; | |
19244 | format_header_data = buf; | |
19245 | for (formati = 0; formati < format_count; formati++) | |
19246 | { | |
19247 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19248 | buf += bytes_read; | |
19249 | read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19250 | buf += bytes_read; | |
19251 | } | |
19252 | ||
19253 | data_count = read_unsigned_leb128 (abfd, buf, &bytes_read); | |
19254 | buf += bytes_read; | |
19255 | for (datai = 0; datai < data_count; datai++) | |
19256 | { | |
19257 | const gdb_byte *format = format_header_data; | |
19258 | struct file_entry fe; | |
19259 | ||
43988095 JK |
19260 | for (formati = 0; formati < format_count; formati++) |
19261 | { | |
ecfb656c | 19262 | ULONGEST content_type = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19263 | format += bytes_read; |
43988095 | 19264 | |
ecfb656c | 19265 | ULONGEST form = read_unsigned_leb128 (abfd, format, &bytes_read); |
43988095 | 19266 | format += bytes_read; |
ecfb656c PA |
19267 | |
19268 | gdb::optional<const char *> string; | |
19269 | gdb::optional<unsigned int> uint; | |
19270 | ||
43988095 JK |
19271 | switch (form) |
19272 | { | |
19273 | case DW_FORM_string: | |
ecfb656c | 19274 | string.emplace (read_direct_string (abfd, buf, &bytes_read)); |
43988095 JK |
19275 | buf += bytes_read; |
19276 | break; | |
19277 | ||
19278 | case DW_FORM_line_strp: | |
86c0bb4c TT |
19279 | string.emplace |
19280 | (dwarf2_per_objfile->read_line_string (buf, | |
19281 | cu_header, | |
19282 | &bytes_read)); | |
43988095 JK |
19283 | buf += bytes_read; |
19284 | break; | |
19285 | ||
19286 | case DW_FORM_data1: | |
ecfb656c | 19287 | uint.emplace (read_1_byte (abfd, buf)); |
43988095 JK |
19288 | buf += 1; |
19289 | break; | |
19290 | ||
19291 | case DW_FORM_data2: | |
ecfb656c | 19292 | uint.emplace (read_2_bytes (abfd, buf)); |
43988095 JK |
19293 | buf += 2; |
19294 | break; | |
19295 | ||
19296 | case DW_FORM_data4: | |
ecfb656c | 19297 | uint.emplace (read_4_bytes (abfd, buf)); |
43988095 JK |
19298 | buf += 4; |
19299 | break; | |
19300 | ||
19301 | case DW_FORM_data8: | |
ecfb656c | 19302 | uint.emplace (read_8_bytes (abfd, buf)); |
43988095 JK |
19303 | buf += 8; |
19304 | break; | |
19305 | ||
7ba99d21 AT |
19306 | case DW_FORM_data16: |
19307 | /* This is used for MD5, but file_entry does not record MD5s. */ | |
19308 | buf += 16; | |
19309 | break; | |
19310 | ||
43988095 | 19311 | case DW_FORM_udata: |
ecfb656c | 19312 | uint.emplace (read_unsigned_leb128 (abfd, buf, &bytes_read)); |
43988095 JK |
19313 | buf += bytes_read; |
19314 | break; | |
19315 | ||
19316 | case DW_FORM_block: | |
19317 | /* It is valid only for DW_LNCT_timestamp which is ignored by | |
19318 | current GDB. */ | |
19319 | break; | |
19320 | } | |
ecfb656c PA |
19321 | |
19322 | switch (content_type) | |
19323 | { | |
19324 | case DW_LNCT_path: | |
19325 | if (string.has_value ()) | |
19326 | fe.name = *string; | |
19327 | break; | |
19328 | case DW_LNCT_directory_index: | |
19329 | if (uint.has_value ()) | |
19330 | fe.d_index = (dir_index) *uint; | |
19331 | break; | |
19332 | case DW_LNCT_timestamp: | |
19333 | if (uint.has_value ()) | |
19334 | fe.mod_time = *uint; | |
19335 | break; | |
19336 | case DW_LNCT_size: | |
19337 | if (uint.has_value ()) | |
19338 | fe.length = *uint; | |
19339 | break; | |
19340 | case DW_LNCT_MD5: | |
19341 | break; | |
19342 | default: | |
b98664d3 | 19343 | complaint (_("Unknown format content type %s"), |
ecfb656c PA |
19344 | pulongest (content_type)); |
19345 | } | |
43988095 JK |
19346 | } |
19347 | ||
ecfb656c | 19348 | callback (lh, fe.name, fe.d_index, fe.mod_time, fe.length); |
43988095 JK |
19349 | } |
19350 | ||
19351 | *bufp = buf; | |
19352 | } | |
19353 | ||
debd256d | 19354 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 19355 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 19356 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
19357 | Returns NULL if there is a problem reading the header, e.g., if it |
19358 | has a version we don't understand. | |
debd256d JB |
19359 | |
19360 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
19361 | the returned object point into the dwarf line section buffer, |
19362 | and must not be freed. */ | |
ae2de4f8 | 19363 | |
fff8551c | 19364 | static line_header_up |
9c541725 | 19365 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 19366 | { |
d521ce57 | 19367 | const gdb_byte *line_ptr; |
c764a876 | 19368 | unsigned int bytes_read, offset_size; |
debd256d | 19369 | int i; |
d521ce57 | 19370 | const char *cur_dir, *cur_file; |
3019eac3 DE |
19371 | struct dwarf2_section_info *section; |
19372 | bfd *abfd; | |
518817b3 SM |
19373 | struct dwarf2_per_objfile *dwarf2_per_objfile |
19374 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 | 19375 | |
36586728 | 19376 | section = get_debug_line_section (cu); |
96b79293 | 19377 | section->read (dwarf2_per_objfile->objfile); |
3019eac3 | 19378 | if (section->buffer == NULL) |
debd256d | 19379 | { |
3019eac3 | 19380 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 19381 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 19382 | else |
b98664d3 | 19383 | complaint (_("missing .debug_line section")); |
debd256d JB |
19384 | return 0; |
19385 | } | |
19386 | ||
fceca515 DE |
19387 | /* We can't do this until we know the section is non-empty. |
19388 | Only then do we know we have such a section. */ | |
96b79293 | 19389 | abfd = section->get_bfd_owner (); |
fceca515 | 19390 | |
a738430d MK |
19391 | /* Make sure that at least there's room for the total_length field. |
19392 | That could be 12 bytes long, but we're just going to fudge that. */ | |
9c541725 | 19393 | if (to_underlying (sect_off) + 4 >= section->size) |
debd256d | 19394 | { |
4d3c2250 | 19395 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
19396 | return 0; |
19397 | } | |
19398 | ||
fff8551c | 19399 | line_header_up lh (new line_header ()); |
debd256d | 19400 | |
9c541725 | 19401 | lh->sect_off = sect_off; |
527f3840 JK |
19402 | lh->offset_in_dwz = cu->per_cu->is_dwz; |
19403 | ||
9c541725 | 19404 | line_ptr = section->buffer + to_underlying (sect_off); |
debd256d | 19405 | |
a738430d | 19406 | /* Read in the header. */ |
6e70227d | 19407 | lh->total_length = |
c764a876 DE |
19408 | read_checked_initial_length_and_offset (abfd, line_ptr, &cu->header, |
19409 | &bytes_read, &offset_size); | |
debd256d | 19410 | line_ptr += bytes_read; |
7ba99d21 AT |
19411 | |
19412 | const gdb_byte *start_here = line_ptr; | |
19413 | ||
3019eac3 | 19414 | if (line_ptr + lh->total_length > (section->buffer + section->size)) |
debd256d | 19415 | { |
4d3c2250 | 19416 | dwarf2_statement_list_fits_in_line_number_section_complaint (); |
debd256d JB |
19417 | return 0; |
19418 | } | |
7ba99d21 | 19419 | lh->statement_program_end = start_here + lh->total_length; |
debd256d JB |
19420 | lh->version = read_2_bytes (abfd, line_ptr); |
19421 | line_ptr += 2; | |
43988095 | 19422 | if (lh->version > 5) |
cd366ee8 DE |
19423 | { |
19424 | /* This is a version we don't understand. The format could have | |
19425 | changed in ways we don't handle properly so just punt. */ | |
b98664d3 | 19426 | complaint (_("unsupported version in .debug_line section")); |
cd366ee8 DE |
19427 | return NULL; |
19428 | } | |
43988095 JK |
19429 | if (lh->version >= 5) |
19430 | { | |
19431 | gdb_byte segment_selector_size; | |
19432 | ||
19433 | /* Skip address size. */ | |
19434 | read_1_byte (abfd, line_ptr); | |
19435 | line_ptr += 1; | |
19436 | ||
19437 | segment_selector_size = read_1_byte (abfd, line_ptr); | |
19438 | line_ptr += 1; | |
19439 | if (segment_selector_size != 0) | |
19440 | { | |
b98664d3 | 19441 | complaint (_("unsupported segment selector size %u " |
43988095 JK |
19442 | "in .debug_line section"), |
19443 | segment_selector_size); | |
19444 | return NULL; | |
19445 | } | |
19446 | } | |
24aa364d | 19447 | lh->header_length = read_offset (abfd, line_ptr, offset_size); |
c764a876 | 19448 | line_ptr += offset_size; |
7ba99d21 | 19449 | lh->statement_program_start = line_ptr + lh->header_length; |
debd256d JB |
19450 | lh->minimum_instruction_length = read_1_byte (abfd, line_ptr); |
19451 | line_ptr += 1; | |
2dc7f7b3 TT |
19452 | if (lh->version >= 4) |
19453 | { | |
19454 | lh->maximum_ops_per_instruction = read_1_byte (abfd, line_ptr); | |
19455 | line_ptr += 1; | |
19456 | } | |
19457 | else | |
19458 | lh->maximum_ops_per_instruction = 1; | |
19459 | ||
19460 | if (lh->maximum_ops_per_instruction == 0) | |
19461 | { | |
19462 | lh->maximum_ops_per_instruction = 1; | |
b98664d3 | 19463 | complaint (_("invalid maximum_ops_per_instruction " |
3e43a32a | 19464 | "in `.debug_line' section")); |
2dc7f7b3 TT |
19465 | } |
19466 | ||
debd256d JB |
19467 | lh->default_is_stmt = read_1_byte (abfd, line_ptr); |
19468 | line_ptr += 1; | |
19469 | lh->line_base = read_1_signed_byte (abfd, line_ptr); | |
19470 | line_ptr += 1; | |
19471 | lh->line_range = read_1_byte (abfd, line_ptr); | |
19472 | line_ptr += 1; | |
19473 | lh->opcode_base = read_1_byte (abfd, line_ptr); | |
19474 | line_ptr += 1; | |
fff8551c | 19475 | lh->standard_opcode_lengths.reset (new unsigned char[lh->opcode_base]); |
debd256d JB |
19476 | |
19477 | lh->standard_opcode_lengths[0] = 1; /* This should never be used anyway. */ | |
19478 | for (i = 1; i < lh->opcode_base; ++i) | |
19479 | { | |
19480 | lh->standard_opcode_lengths[i] = read_1_byte (abfd, line_ptr); | |
19481 | line_ptr += 1; | |
19482 | } | |
19483 | ||
43988095 | 19484 | if (lh->version >= 5) |
debd256d | 19485 | { |
43988095 | 19486 | /* Read directory table. */ |
ed2dc618 SM |
19487 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
19488 | &cu->header, | |
b926417a | 19489 | [] (struct line_header *header, const char *name, |
ecfb656c | 19490 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
19491 | unsigned int length) |
19492 | { | |
b926417a | 19493 | header->add_include_dir (name); |
fff8551c | 19494 | }); |
debd256d | 19495 | |
43988095 | 19496 | /* Read file name table. */ |
ed2dc618 SM |
19497 | read_formatted_entries (dwarf2_per_objfile, abfd, &line_ptr, lh.get (), |
19498 | &cu->header, | |
b926417a | 19499 | [] (struct line_header *header, const char *name, |
ecfb656c | 19500 | dir_index d_index, unsigned int mod_time, |
fff8551c PA |
19501 | unsigned int length) |
19502 | { | |
b926417a | 19503 | header->add_file_name (name, d_index, mod_time, length); |
fff8551c | 19504 | }); |
43988095 JK |
19505 | } |
19506 | else | |
debd256d | 19507 | { |
43988095 JK |
19508 | /* Read directory table. */ |
19509 | while ((cur_dir = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19510 | { | |
19511 | line_ptr += bytes_read; | |
fff8551c | 19512 | lh->add_include_dir (cur_dir); |
43988095 | 19513 | } |
debd256d JB |
19514 | line_ptr += bytes_read; |
19515 | ||
43988095 JK |
19516 | /* Read file name table. */ |
19517 | while ((cur_file = read_direct_string (abfd, line_ptr, &bytes_read)) != NULL) | |
19518 | { | |
ecfb656c PA |
19519 | unsigned int mod_time, length; |
19520 | dir_index d_index; | |
43988095 JK |
19521 | |
19522 | line_ptr += bytes_read; | |
ecfb656c | 19523 | d_index = (dir_index) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
43988095 JK |
19524 | line_ptr += bytes_read; |
19525 | mod_time = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19526 | line_ptr += bytes_read; | |
19527 | length = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
19528 | line_ptr += bytes_read; | |
19529 | ||
ecfb656c | 19530 | lh->add_file_name (cur_file, d_index, mod_time, length); |
43988095 JK |
19531 | } |
19532 | line_ptr += bytes_read; | |
debd256d | 19533 | } |
debd256d | 19534 | |
3019eac3 | 19535 | if (line_ptr > (section->buffer + section->size)) |
b98664d3 | 19536 | complaint (_("line number info header doesn't " |
3e43a32a | 19537 | "fit in `.debug_line' section")); |
debd256d | 19538 | |
debd256d JB |
19539 | return lh; |
19540 | } | |
c906108c | 19541 | |
c6da4cef | 19542 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 19543 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 19544 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
19545 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
19546 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 19547 | |
d521ce57 | 19548 | static const char * |
7ba99d21 | 19549 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
891813be | 19550 | const dwarf2_psymtab *pst, |
c89b44cd TT |
19551 | const char *comp_dir, |
19552 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 19553 | { |
d521ce57 TT |
19554 | const char *include_name = fe.name; |
19555 | const char *include_name_to_compare = include_name; | |
72b9f47f | 19556 | const char *pst_filename; |
c6da4cef DE |
19557 | int file_is_pst; |
19558 | ||
8c43009f | 19559 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 19560 | |
c89b44cd | 19561 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
19562 | if (!IS_ABSOLUTE_PATH (include_name) |
19563 | && (dir_name != NULL || comp_dir != NULL)) | |
19564 | { | |
19565 | /* Avoid creating a duplicate psymtab for PST. | |
19566 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
19567 | Before we do the comparison, however, we need to account | |
19568 | for DIR_NAME and COMP_DIR. | |
19569 | First prepend dir_name (if non-NULL). If we still don't | |
19570 | have an absolute path prepend comp_dir (if non-NULL). | |
19571 | However, the directory we record in the include-file's | |
19572 | psymtab does not contain COMP_DIR (to match the | |
19573 | corresponding symtab(s)). | |
19574 | ||
19575 | Example: | |
19576 | ||
19577 | bash$ cd /tmp | |
19578 | bash$ gcc -g ./hello.c | |
19579 | include_name = "hello.c" | |
19580 | dir_name = "." | |
19581 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
19582 | DW_AT_name = "./hello.c" |
19583 | ||
19584 | */ | |
c6da4cef DE |
19585 | |
19586 | if (dir_name != NULL) | |
19587 | { | |
c89b44cd TT |
19588 | name_holder->reset (concat (dir_name, SLASH_STRING, |
19589 | include_name, (char *) NULL)); | |
19590 | include_name = name_holder->get (); | |
c6da4cef | 19591 | include_name_to_compare = include_name; |
c6da4cef DE |
19592 | } |
19593 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
19594 | { | |
c89b44cd TT |
19595 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
19596 | include_name, (char *) NULL)); | |
19597 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
19598 | } |
19599 | } | |
19600 | ||
19601 | pst_filename = pst->filename; | |
c89b44cd | 19602 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
19603 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
19604 | { | |
c89b44cd TT |
19605 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
19606 | pst_filename, (char *) NULL)); | |
19607 | pst_filename = copied_name.get (); | |
c6da4cef DE |
19608 | } |
19609 | ||
1e3fad37 | 19610 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 19611 | |
c6da4cef DE |
19612 | if (file_is_pst) |
19613 | return NULL; | |
19614 | return include_name; | |
19615 | } | |
19616 | ||
d9b3de22 DE |
19617 | /* State machine to track the state of the line number program. */ |
19618 | ||
6f77053d | 19619 | class lnp_state_machine |
d9b3de22 | 19620 | { |
6f77053d PA |
19621 | public: |
19622 | /* Initialize a machine state for the start of a line number | |
19623 | program. */ | |
804d2729 TT |
19624 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
19625 | bool record_lines_p); | |
6f77053d | 19626 | |
8c43009f PA |
19627 | file_entry *current_file () |
19628 | { | |
19629 | /* lh->file_names is 0-based, but the file name numbers in the | |
19630 | statement program are 1-based. */ | |
6f77053d PA |
19631 | return m_line_header->file_name_at (m_file); |
19632 | } | |
19633 | ||
19634 | /* Record the line in the state machine. END_SEQUENCE is true if | |
19635 | we're processing the end of a sequence. */ | |
19636 | void record_line (bool end_sequence); | |
19637 | ||
7ab6656f OJ |
19638 | /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true |
19639 | nop-out rest of the lines in this sequence. */ | |
6f77053d PA |
19640 | void check_line_address (struct dwarf2_cu *cu, |
19641 | const gdb_byte *line_ptr, | |
7ab6656f | 19642 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
19643 | |
19644 | void handle_set_discriminator (unsigned int discriminator) | |
19645 | { | |
19646 | m_discriminator = discriminator; | |
19647 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
19648 | } | |
19649 | ||
19650 | /* Handle DW_LNE_set_address. */ | |
19651 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
19652 | { | |
19653 | m_op_index = 0; | |
19654 | address += baseaddr; | |
19655 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
19656 | } | |
19657 | ||
19658 | /* Handle DW_LNS_advance_pc. */ | |
19659 | void handle_advance_pc (CORE_ADDR adjust); | |
19660 | ||
19661 | /* Handle a special opcode. */ | |
19662 | void handle_special_opcode (unsigned char op_code); | |
19663 | ||
19664 | /* Handle DW_LNS_advance_line. */ | |
19665 | void handle_advance_line (int line_delta) | |
19666 | { | |
19667 | advance_line (line_delta); | |
19668 | } | |
19669 | ||
19670 | /* Handle DW_LNS_set_file. */ | |
19671 | void handle_set_file (file_name_index file); | |
19672 | ||
19673 | /* Handle DW_LNS_negate_stmt. */ | |
19674 | void handle_negate_stmt () | |
19675 | { | |
19676 | m_is_stmt = !m_is_stmt; | |
19677 | } | |
19678 | ||
19679 | /* Handle DW_LNS_const_add_pc. */ | |
19680 | void handle_const_add_pc (); | |
19681 | ||
19682 | /* Handle DW_LNS_fixed_advance_pc. */ | |
19683 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
19684 | { | |
19685 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19686 | m_op_index = 0; | |
19687 | } | |
19688 | ||
19689 | /* Handle DW_LNS_copy. */ | |
19690 | void handle_copy () | |
19691 | { | |
19692 | record_line (false); | |
19693 | m_discriminator = 0; | |
19694 | } | |
19695 | ||
19696 | /* Handle DW_LNE_end_sequence. */ | |
19697 | void handle_end_sequence () | |
19698 | { | |
804d2729 | 19699 | m_currently_recording_lines = true; |
6f77053d PA |
19700 | } |
19701 | ||
19702 | private: | |
19703 | /* Advance the line by LINE_DELTA. */ | |
19704 | void advance_line (int line_delta) | |
19705 | { | |
19706 | m_line += line_delta; | |
19707 | ||
19708 | if (line_delta != 0) | |
19709 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
19710 | } |
19711 | ||
804d2729 TT |
19712 | struct dwarf2_cu *m_cu; |
19713 | ||
6f77053d PA |
19714 | gdbarch *m_gdbarch; |
19715 | ||
19716 | /* True if we're recording lines. | |
19717 | Otherwise we're building partial symtabs and are just interested in | |
19718 | finding include files mentioned by the line number program. */ | |
19719 | bool m_record_lines_p; | |
19720 | ||
8c43009f | 19721 | /* The line number header. */ |
6f77053d | 19722 | line_header *m_line_header; |
8c43009f | 19723 | |
6f77053d PA |
19724 | /* These are part of the standard DWARF line number state machine, |
19725 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 19726 | |
6f77053d | 19727 | unsigned char m_op_index = 0; |
7ba99d21 AT |
19728 | /* The line table index of the current file. */ |
19729 | file_name_index m_file = 1; | |
6f77053d PA |
19730 | unsigned int m_line = 1; |
19731 | ||
19732 | /* These are initialized in the constructor. */ | |
19733 | ||
19734 | CORE_ADDR m_address; | |
19735 | bool m_is_stmt; | |
19736 | unsigned int m_discriminator; | |
d9b3de22 DE |
19737 | |
19738 | /* Additional bits of state we need to track. */ | |
19739 | ||
19740 | /* The last file that we called dwarf2_start_subfile for. | |
19741 | This is only used for TLLs. */ | |
6f77053d | 19742 | unsigned int m_last_file = 0; |
d9b3de22 | 19743 | /* The last file a line number was recorded for. */ |
6f77053d | 19744 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 19745 | |
804d2729 TT |
19746 | /* When true, record the lines we decode. */ |
19747 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
19748 | |
19749 | /* The last line number that was recorded, used to coalesce | |
19750 | consecutive entries for the same line. This can happen, for | |
19751 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
19752 | unsigned int m_last_line = 0; |
19753 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 19754 | }; |
d9b3de22 | 19755 | |
6f77053d PA |
19756 | void |
19757 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
19758 | { | |
19759 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
19760 | / m_line_header->maximum_ops_per_instruction) | |
19761 | * m_line_header->minimum_instruction_length); | |
19762 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19763 | m_op_index = ((m_op_index + adjust) | |
19764 | % m_line_header->maximum_ops_per_instruction); | |
19765 | } | |
d9b3de22 | 19766 | |
6f77053d PA |
19767 | void |
19768 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 19769 | { |
6f77053d | 19770 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
258bf0ee RB |
19771 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
19772 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; | |
19773 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) | |
6f77053d PA |
19774 | / m_line_header->maximum_ops_per_instruction) |
19775 | * m_line_header->minimum_instruction_length); | |
19776 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
258bf0ee | 19777 | m_op_index = ((m_op_index + adj_opcode_d) |
6f77053d | 19778 | % m_line_header->maximum_ops_per_instruction); |
d9b3de22 | 19779 | |
258bf0ee | 19780 | int line_delta = m_line_header->line_base + adj_opcode_r; |
6f77053d PA |
19781 | advance_line (line_delta); |
19782 | record_line (false); | |
19783 | m_discriminator = 0; | |
19784 | } | |
d9b3de22 | 19785 | |
6f77053d PA |
19786 | void |
19787 | lnp_state_machine::handle_set_file (file_name_index file) | |
19788 | { | |
19789 | m_file = file; | |
19790 | ||
19791 | const file_entry *fe = current_file (); | |
19792 | if (fe == NULL) | |
19793 | dwarf2_debug_line_missing_file_complaint (); | |
19794 | else if (m_record_lines_p) | |
19795 | { | |
19796 | const char *dir = fe->include_dir (m_line_header); | |
19797 | ||
c24bdb02 | 19798 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 19799 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 19800 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
19801 | } |
19802 | } | |
19803 | ||
19804 | void | |
19805 | lnp_state_machine::handle_const_add_pc () | |
19806 | { | |
19807 | CORE_ADDR adjust | |
19808 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
19809 | ||
19810 | CORE_ADDR addr_adj | |
19811 | = (((m_op_index + adjust) | |
19812 | / m_line_header->maximum_ops_per_instruction) | |
19813 | * m_line_header->minimum_instruction_length); | |
19814 | ||
19815 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
19816 | m_op_index = ((m_op_index + adjust) | |
19817 | % m_line_header->maximum_ops_per_instruction); | |
19818 | } | |
d9b3de22 | 19819 | |
a05a36a5 DE |
19820 | /* Return non-zero if we should add LINE to the line number table. |
19821 | LINE is the line to add, LAST_LINE is the last line that was added, | |
19822 | LAST_SUBFILE is the subfile for LAST_LINE. | |
19823 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
19824 | had a non-zero discriminator. | |
19825 | ||
19826 | We have to be careful in the presence of discriminators. | |
19827 | E.g., for this line: | |
19828 | ||
19829 | for (i = 0; i < 100000; i++); | |
19830 | ||
19831 | clang can emit four line number entries for that one line, | |
19832 | each with a different discriminator. | |
19833 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
19834 | ||
19835 | However, we want gdb to coalesce all four entries into one. | |
19836 | Otherwise the user could stepi into the middle of the line and | |
19837 | gdb would get confused about whether the pc really was in the | |
19838 | middle of the line. | |
19839 | ||
19840 | Things are further complicated by the fact that two consecutive | |
19841 | line number entries for the same line is a heuristic used by gcc | |
19842 | to denote the end of the prologue. So we can't just discard duplicate | |
19843 | entries, we have to be selective about it. The heuristic we use is | |
19844 | that we only collapse consecutive entries for the same line if at least | |
19845 | one of those entries has a non-zero discriminator. PR 17276. | |
19846 | ||
19847 | Note: Addresses in the line number state machine can never go backwards | |
19848 | within one sequence, thus this coalescing is ok. */ | |
19849 | ||
19850 | static int | |
804d2729 TT |
19851 | dwarf_record_line_p (struct dwarf2_cu *cu, |
19852 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
19853 | int line_has_non_zero_discriminator, |
19854 | struct subfile *last_subfile) | |
19855 | { | |
c24bdb02 | 19856 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
19857 | return 1; |
19858 | if (line != last_line) | |
19859 | return 1; | |
19860 | /* Same line for the same file that we've seen already. | |
19861 | As a last check, for pr 17276, only record the line if the line | |
19862 | has never had a non-zero discriminator. */ | |
19863 | if (!line_has_non_zero_discriminator) | |
19864 | return 1; | |
19865 | return 0; | |
19866 | } | |
19867 | ||
804d2729 TT |
19868 | /* Use the CU's builder to record line number LINE beginning at |
19869 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
19870 | |
19871 | static void | |
d9b3de22 | 19872 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
8c95582d | 19873 | unsigned int line, CORE_ADDR address, bool is_stmt, |
804d2729 | 19874 | struct dwarf2_cu *cu) |
252a6764 DE |
19875 | { |
19876 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
19877 | ||
27e0867f DE |
19878 | if (dwarf_line_debug) |
19879 | { | |
19880 | fprintf_unfiltered (gdb_stdlog, | |
19881 | "Recording line %u, file %s, address %s\n", | |
19882 | line, lbasename (subfile->name), | |
19883 | paddress (gdbarch, address)); | |
19884 | } | |
19885 | ||
804d2729 | 19886 | if (cu != nullptr) |
8c95582d | 19887 | cu->get_builder ()->record_line (subfile, line, addr, is_stmt); |
252a6764 DE |
19888 | } |
19889 | ||
19890 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
19891 | Mark the end of a set of line number records. | |
d9b3de22 | 19892 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
19893 | If SUBFILE is NULL the request is ignored. */ |
19894 | ||
19895 | static void | |
19896 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 19897 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 19898 | { |
27e0867f DE |
19899 | if (subfile == NULL) |
19900 | return; | |
19901 | ||
19902 | if (dwarf_line_debug) | |
19903 | { | |
19904 | fprintf_unfiltered (gdb_stdlog, | |
19905 | "Finishing current line, file %s, address %s\n", | |
19906 | lbasename (subfile->name), | |
19907 | paddress (gdbarch, address)); | |
19908 | } | |
19909 | ||
8c95582d | 19910 | dwarf_record_line_1 (gdbarch, subfile, 0, address, true, cu); |
d9b3de22 DE |
19911 | } |
19912 | ||
6f77053d PA |
19913 | void |
19914 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 19915 | { |
d9b3de22 DE |
19916 | if (dwarf_line_debug) |
19917 | { | |
19918 | fprintf_unfiltered (gdb_stdlog, | |
19919 | "Processing actual line %u: file %u," | |
94a72be7 | 19920 | " address %s, is_stmt %u, discrim %u%s\n", |
7ba99d21 | 19921 | m_line, m_file, |
6f77053d | 19922 | paddress (m_gdbarch, m_address), |
94a72be7 AB |
19923 | m_is_stmt, m_discriminator, |
19924 | (end_sequence ? "\t(end sequence)" : "")); | |
d9b3de22 DE |
19925 | } |
19926 | ||
6f77053d | 19927 | file_entry *fe = current_file (); |
8c43009f PA |
19928 | |
19929 | if (fe == NULL) | |
d9b3de22 DE |
19930 | dwarf2_debug_line_missing_file_complaint (); |
19931 | /* For now we ignore lines not starting on an instruction boundary. | |
19932 | But not when processing end_sequence for compatibility with the | |
19933 | previous version of the code. */ | |
6f77053d | 19934 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 19935 | { |
8c43009f | 19936 | fe->included_p = 1; |
8c95582d | 19937 | if (m_record_lines_p) |
d9b3de22 | 19938 | { |
c24bdb02 | 19939 | if (m_last_subfile != m_cu->get_builder ()->get_current_subfile () |
804d2729 | 19940 | || end_sequence) |
d9b3de22 | 19941 | { |
804d2729 TT |
19942 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
19943 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
19944 | } |
19945 | ||
19946 | if (!end_sequence) | |
19947 | { | |
8c95582d AB |
19948 | bool is_stmt = producer_is_codewarrior (m_cu) || m_is_stmt; |
19949 | ||
804d2729 | 19950 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
19951 | m_line_has_non_zero_discriminator, |
19952 | m_last_subfile)) | |
d9b3de22 | 19953 | { |
c24bdb02 | 19954 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 19955 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 19956 | builder->get_current_subfile (), |
8c95582d | 19957 | m_line, m_address, is_stmt, |
804d2729 | 19958 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 19959 | } |
c24bdb02 | 19960 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 19961 | m_last_line = m_line; |
d9b3de22 DE |
19962 | } |
19963 | } | |
19964 | } | |
19965 | } | |
19966 | ||
804d2729 TT |
19967 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
19968 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 19969 | { |
804d2729 | 19970 | m_cu = cu; |
6f77053d PA |
19971 | m_gdbarch = arch; |
19972 | m_record_lines_p = record_lines_p; | |
19973 | m_line_header = lh; | |
d9b3de22 | 19974 | |
804d2729 | 19975 | m_currently_recording_lines = true; |
d9b3de22 | 19976 | |
d9b3de22 DE |
19977 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
19978 | was a line entry for it so that the backend has a chance to adjust it | |
19979 | and also record it in case it needs it. This is currently used by MIPS | |
19980 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
19981 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
19982 | m_is_stmt = lh->default_is_stmt; | |
19983 | m_discriminator = 0; | |
252a6764 DE |
19984 | } |
19985 | ||
6f77053d PA |
19986 | void |
19987 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
19988 | const gdb_byte *line_ptr, | |
7ab6656f | 19989 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 19990 | { |
7ab6656f OJ |
19991 | /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside |
19992 | the pc range of the CU. However, we restrict the test to only ADDRESS | |
19993 | values of zero to preserve GDB's previous behaviour which is to handle | |
19994 | the specific case of a function being GC'd by the linker. */ | |
924c2928 | 19995 | |
7ab6656f | 19996 | if (address == 0 && address < unrelocated_lowpc) |
924c2928 DE |
19997 | { |
19998 | /* This line table is for a function which has been | |
19999 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
20000 | ||
518817b3 | 20001 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
924c2928 DE |
20002 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
20003 | ||
b98664d3 | 20004 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 20005 | line_offset, objfile_name (objfile)); |
804d2729 TT |
20006 | m_currently_recording_lines = false; |
20007 | /* Note: m_currently_recording_lines is left as false until we see | |
20008 | DW_LNE_end_sequence. */ | |
924c2928 DE |
20009 | } |
20010 | } | |
20011 | ||
f3f5162e | 20012 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
20013 | Process the line number information in LH. |
20014 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
20015 | program in order to set included_p for every referenced header. */ | |
debd256d | 20016 | |
c906108c | 20017 | static void |
43f3e411 DE |
20018 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
20019 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 20020 | { |
d521ce57 TT |
20021 | const gdb_byte *line_ptr, *extended_end; |
20022 | const gdb_byte *line_end; | |
a8c50c1f | 20023 | unsigned int bytes_read, extended_len; |
699ca60a | 20024 | unsigned char op_code, extended_op; |
e142c38c | 20025 | CORE_ADDR baseaddr; |
518817b3 | 20026 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20027 | bfd *abfd = objfile->obfd; |
fbf65064 | 20028 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
6f77053d PA |
20029 | /* True if we're recording line info (as opposed to building partial |
20030 | symtabs and just interested in finding include files mentioned by | |
20031 | the line number program). */ | |
20032 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 20033 | |
b3b3bada | 20034 | baseaddr = objfile->text_section_offset (); |
c906108c | 20035 | |
debd256d JB |
20036 | line_ptr = lh->statement_program_start; |
20037 | line_end = lh->statement_program_end; | |
c906108c SS |
20038 | |
20039 | /* Read the statement sequences until there's nothing left. */ | |
20040 | while (line_ptr < line_end) | |
20041 | { | |
6f77053d PA |
20042 | /* The DWARF line number program state machine. Reset the state |
20043 | machine at the start of each sequence. */ | |
804d2729 | 20044 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 20045 | bool end_sequence = false; |
d9b3de22 | 20046 | |
8c43009f | 20047 | if (record_lines_p) |
c906108c | 20048 | { |
8c43009f PA |
20049 | /* Start a subfile for the current file of the state |
20050 | machine. */ | |
20051 | const file_entry *fe = state_machine.current_file (); | |
20052 | ||
20053 | if (fe != NULL) | |
804d2729 | 20054 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
20055 | } |
20056 | ||
a738430d | 20057 | /* Decode the table. */ |
d9b3de22 | 20058 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
20059 | { |
20060 | op_code = read_1_byte (abfd, line_ptr); | |
20061 | line_ptr += 1; | |
9aa1fe7e | 20062 | |
debd256d | 20063 | if (op_code >= lh->opcode_base) |
6e70227d | 20064 | { |
8e07a239 | 20065 | /* Special opcode. */ |
6f77053d | 20066 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
20067 | } |
20068 | else switch (op_code) | |
c906108c SS |
20069 | { |
20070 | case DW_LNS_extended_op: | |
3e43a32a MS |
20071 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
20072 | &bytes_read); | |
473b7be6 | 20073 | line_ptr += bytes_read; |
a8c50c1f | 20074 | extended_end = line_ptr + extended_len; |
c906108c SS |
20075 | extended_op = read_1_byte (abfd, line_ptr); |
20076 | line_ptr += 1; | |
20077 | switch (extended_op) | |
20078 | { | |
20079 | case DW_LNE_end_sequence: | |
6f77053d PA |
20080 | state_machine.handle_end_sequence (); |
20081 | end_sequence = true; | |
c906108c SS |
20082 | break; |
20083 | case DW_LNE_set_address: | |
d9b3de22 DE |
20084 | { |
20085 | CORE_ADDR address | |
c8a7a66f | 20086 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
d9b3de22 | 20087 | line_ptr += bytes_read; |
6f77053d PA |
20088 | |
20089 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 20090 | lowpc - baseaddr, address); |
6f77053d | 20091 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 20092 | } |
c906108c SS |
20093 | break; |
20094 | case DW_LNE_define_file: | |
debd256d | 20095 | { |
d521ce57 | 20096 | const char *cur_file; |
ecfb656c PA |
20097 | unsigned int mod_time, length; |
20098 | dir_index dindex; | |
6e70227d | 20099 | |
3e43a32a MS |
20100 | cur_file = read_direct_string (abfd, line_ptr, |
20101 | &bytes_read); | |
debd256d | 20102 | line_ptr += bytes_read; |
ecfb656c | 20103 | dindex = (dir_index) |
debd256d JB |
20104 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
20105 | line_ptr += bytes_read; | |
20106 | mod_time = | |
20107 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20108 | line_ptr += bytes_read; | |
20109 | length = | |
20110 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20111 | line_ptr += bytes_read; | |
ecfb656c | 20112 | lh->add_file_name (cur_file, dindex, mod_time, length); |
debd256d | 20113 | } |
c906108c | 20114 | break; |
d0c6ba3d | 20115 | case DW_LNE_set_discriminator: |
6f77053d PA |
20116 | { |
20117 | /* The discriminator is not interesting to the | |
20118 | debugger; just ignore it. We still need to | |
20119 | check its value though: | |
20120 | if there are consecutive entries for the same | |
20121 | (non-prologue) line we want to coalesce them. | |
20122 | PR 17276. */ | |
20123 | unsigned int discr | |
20124 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20125 | line_ptr += bytes_read; | |
20126 | ||
20127 | state_machine.handle_set_discriminator (discr); | |
20128 | } | |
d0c6ba3d | 20129 | break; |
c906108c | 20130 | default: |
b98664d3 | 20131 | complaint (_("mangled .debug_line section")); |
debd256d | 20132 | return; |
c906108c | 20133 | } |
a8c50c1f DJ |
20134 | /* Make sure that we parsed the extended op correctly. If e.g. |
20135 | we expected a different address size than the producer used, | |
20136 | we may have read the wrong number of bytes. */ | |
20137 | if (line_ptr != extended_end) | |
20138 | { | |
b98664d3 | 20139 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
20140 | return; |
20141 | } | |
c906108c SS |
20142 | break; |
20143 | case DW_LNS_copy: | |
6f77053d | 20144 | state_machine.handle_copy (); |
c906108c SS |
20145 | break; |
20146 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
20147 | { |
20148 | CORE_ADDR adjust | |
20149 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 20150 | line_ptr += bytes_read; |
6f77053d PA |
20151 | |
20152 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 20153 | } |
c906108c SS |
20154 | break; |
20155 | case DW_LNS_advance_line: | |
a05a36a5 DE |
20156 | { |
20157 | int line_delta | |
20158 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 20159 | line_ptr += bytes_read; |
6f77053d PA |
20160 | |
20161 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 20162 | } |
c906108c SS |
20163 | break; |
20164 | case DW_LNS_set_file: | |
d9b3de22 | 20165 | { |
6f77053d | 20166 | file_name_index file |
ecfb656c PA |
20167 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
20168 | &bytes_read); | |
d9b3de22 | 20169 | line_ptr += bytes_read; |
8c43009f | 20170 | |
6f77053d | 20171 | state_machine.handle_set_file (file); |
d9b3de22 | 20172 | } |
c906108c SS |
20173 | break; |
20174 | case DW_LNS_set_column: | |
0ad93d4f | 20175 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
20176 | line_ptr += bytes_read; |
20177 | break; | |
20178 | case DW_LNS_negate_stmt: | |
6f77053d | 20179 | state_machine.handle_negate_stmt (); |
c906108c SS |
20180 | break; |
20181 | case DW_LNS_set_basic_block: | |
c906108c | 20182 | break; |
c2c6d25f JM |
20183 | /* Add to the address register of the state machine the |
20184 | address increment value corresponding to special opcode | |
a738430d MK |
20185 | 255. I.e., this value is scaled by the minimum |
20186 | instruction length since special opcode 255 would have | |
b021a221 | 20187 | scaled the increment. */ |
c906108c | 20188 | case DW_LNS_const_add_pc: |
6f77053d | 20189 | state_machine.handle_const_add_pc (); |
c906108c SS |
20190 | break; |
20191 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 20192 | { |
6f77053d | 20193 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 20194 | line_ptr += 2; |
6f77053d PA |
20195 | |
20196 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 20197 | } |
c906108c | 20198 | break; |
9aa1fe7e | 20199 | default: |
a738430d MK |
20200 | { |
20201 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 20202 | int i; |
a738430d | 20203 | |
debd256d | 20204 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
20205 | { |
20206 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
20207 | line_ptr += bytes_read; | |
20208 | } | |
20209 | } | |
c906108c SS |
20210 | } |
20211 | } | |
d9b3de22 DE |
20212 | |
20213 | if (!end_sequence) | |
20214 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
20215 | ||
20216 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
20217 | in which case we still finish recording the last line). */ | |
6f77053d | 20218 | state_machine.record_line (true); |
c906108c | 20219 | } |
f3f5162e DE |
20220 | } |
20221 | ||
20222 | /* Decode the Line Number Program (LNP) for the given line_header | |
20223 | structure and CU. The actual information extracted and the type | |
20224 | of structures created from the LNP depends on the value of PST. | |
20225 | ||
20226 | 1. If PST is NULL, then this procedure uses the data from the program | |
20227 | to create all necessary symbol tables, and their linetables. | |
20228 | ||
20229 | 2. If PST is not NULL, this procedure reads the program to determine | |
20230 | the list of files included by the unit represented by PST, and | |
20231 | builds all the associated partial symbol tables. | |
20232 | ||
20233 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
20234 | It is used for relative paths in the line table. | |
20235 | NOTE: When processing partial symtabs (pst != NULL), | |
20236 | comp_dir == pst->dirname. | |
20237 | ||
20238 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
20239 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
20240 | symtab we don't use it in the name of the psymtabs we create. | |
20241 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
20242 | A good testcase for this is mb-inline.exp. |
20243 | ||
527f3840 JK |
20244 | LOWPC is the lowest address in CU (or 0 if not known). |
20245 | ||
20246 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
20247 | for its PC<->lines mapping information. Otherwise only the filename | |
20248 | table is read in. */ | |
f3f5162e DE |
20249 | |
20250 | static void | |
20251 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
891813be | 20252 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
527f3840 | 20253 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 20254 | { |
518817b3 | 20255 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
f3f5162e | 20256 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 20257 | |
527f3840 JK |
20258 | if (decode_mapping) |
20259 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
20260 | |
20261 | if (decode_for_pst_p) | |
20262 | { | |
aaa75496 JB |
20263 | /* Now that we're done scanning the Line Header Program, we can |
20264 | create the psymtab of each included file. */ | |
7ba99d21 AT |
20265 | for (auto &file_entry : lh->file_names ()) |
20266 | if (file_entry.included_p == 1) | |
aaa75496 | 20267 | { |
c89b44cd | 20268 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 20269 | const char *include_name = |
7ba99d21 AT |
20270 | psymtab_include_file_name (lh, file_entry, pst, |
20271 | comp_dir, &name_holder); | |
c6da4cef | 20272 | if (include_name != NULL) |
aaa75496 JB |
20273 | dwarf2_create_include_psymtab (include_name, pst, objfile); |
20274 | } | |
20275 | } | |
cb1df416 DJ |
20276 | else |
20277 | { | |
20278 | /* Make sure a symtab is created for every file, even files | |
20279 | which contain only variables (i.e. no code with associated | |
20280 | line numbers). */ | |
c24bdb02 KS |
20281 | buildsym_compunit *builder = cu->get_builder (); |
20282 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 20283 | |
7ba99d21 | 20284 | for (auto &fe : lh->file_names ()) |
cb1df416 | 20285 | { |
804d2729 | 20286 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 20287 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 20288 | { |
c24bdb02 | 20289 | builder->get_current_subfile ()->symtab |
804d2729 | 20290 | = allocate_symtab (cust, |
c24bdb02 | 20291 | builder->get_current_subfile ()->name); |
43f3e411 | 20292 | } |
c24bdb02 | 20293 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
20294 | } |
20295 | } | |
c906108c SS |
20296 | } |
20297 | ||
20298 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
20299 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 20300 | or NULL if not known. |
c906108c SS |
20301 | This routine tries to keep line numbers from identical absolute and |
20302 | relative file names in a common subfile. | |
20303 | ||
20304 | Using the `list' example from the GDB testsuite, which resides in | |
20305 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
20306 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
20307 | ||
c5aa993b | 20308 | DW_AT_name: /srcdir/list0.c |
4d663531 | 20309 | DW_AT_comp_dir: /compdir |
357e46e7 | 20310 | files.files[0].name: list0.h |
c5aa993b | 20311 | files.files[0].dir: /srcdir |
357e46e7 | 20312 | files.files[1].name: list0.c |
c5aa993b | 20313 | files.files[1].dir: /srcdir |
c906108c SS |
20314 | |
20315 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
20316 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
20317 | start_subfile will ensure that this happens provided that we pass the | |
20318 | concatenation of files.files[1].dir and files.files[1].name as the | |
20319 | subfile's name. */ | |
c906108c SS |
20320 | |
20321 | static void | |
804d2729 TT |
20322 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
20323 | const char *dirname) | |
c906108c | 20324 | { |
43816ebc | 20325 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 20326 | |
4d663531 | 20327 | /* In order not to lose the line information directory, |
4f1520fb FR |
20328 | we concatenate it to the filename when it makes sense. |
20329 | Note that the Dwarf3 standard says (speaking of filenames in line | |
20330 | information): ``The directory index is ignored for file names | |
20331 | that represent full path names''. Thus ignoring dirname in the | |
20332 | `else' branch below isn't an issue. */ | |
c906108c | 20333 | |
d5166ae1 | 20334 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 20335 | { |
43816ebc TT |
20336 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
20337 | filename = copy.get (); | |
d521ce57 | 20338 | } |
c906108c | 20339 | |
c24bdb02 | 20340 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
20341 | } |
20342 | ||
804d2729 TT |
20343 | /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the |
20344 | buildsym_compunit constructor. */ | |
f4dc4d17 | 20345 | |
c24bdb02 KS |
20346 | struct compunit_symtab * |
20347 | dwarf2_cu::start_symtab (const char *name, const char *comp_dir, | |
20348 | CORE_ADDR low_pc) | |
f4dc4d17 | 20349 | { |
c24bdb02 | 20350 | gdb_assert (m_builder == nullptr); |
43f3e411 | 20351 | |
c24bdb02 KS |
20352 | m_builder.reset (new struct buildsym_compunit |
20353 | (per_cu->dwarf2_per_objfile->objfile, | |
20354 | name, comp_dir, language, low_pc)); | |
93b8bea4 | 20355 | |
c24bdb02 | 20356 | list_in_scope = get_builder ()->get_file_symbols (); |
804d2729 | 20357 | |
c24bdb02 KS |
20358 | get_builder ()->record_debugformat ("DWARF 2"); |
20359 | get_builder ()->record_producer (producer); | |
f4dc4d17 | 20360 | |
c24bdb02 | 20361 | processing_has_namespace_info = false; |
43f3e411 | 20362 | |
c24bdb02 | 20363 | return get_builder ()->get_compunit_symtab (); |
f4dc4d17 DE |
20364 | } |
20365 | ||
4c2df51b DJ |
20366 | static void |
20367 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 20368 | struct dwarf2_cu *cu) |
4c2df51b | 20369 | { |
518817b3 | 20370 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e7c27a73 DJ |
20371 | struct comp_unit_head *cu_header = &cu->header; |
20372 | ||
4c2df51b DJ |
20373 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
20374 | code here to turn a symbol with DW_AT_external and a | |
20375 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
20376 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
20377 | with some versions of binutils) where shared libraries could have | |
20378 | relocations against symbols in their debug information - the | |
20379 | minimal symbol would have the right address, but the debug info | |
20380 | would not. It's no longer necessary, because we will explicitly | |
20381 | apply relocations when we read in the debug information now. */ | |
20382 | ||
20383 | /* A DW_AT_location attribute with no contents indicates that a | |
20384 | variable has been optimized away. */ | |
4fc6c0d5 | 20385 | if (attr->form_is_block () && DW_BLOCK (attr)->size == 0) |
4c2df51b | 20386 | { |
f1e6e072 | 20387 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
20388 | return; |
20389 | } | |
20390 | ||
20391 | /* Handle one degenerate form of location expression specially, to | |
20392 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
20393 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
20394 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b | 20395 | |
4fc6c0d5 | 20396 | if (attr->form_is_block () |
3019eac3 DE |
20397 | && ((DW_BLOCK (attr)->data[0] == DW_OP_addr |
20398 | && DW_BLOCK (attr)->size == 1 + cu_header->addr_size) | |
336d760d AT |
20399 | || ((DW_BLOCK (attr)->data[0] == DW_OP_GNU_addr_index |
20400 | || DW_BLOCK (attr)->data[0] == DW_OP_addrx) | |
3019eac3 DE |
20401 | && (DW_BLOCK (attr)->size |
20402 | == 1 + leb128_size (&DW_BLOCK (attr)->data[1]))))) | |
4c2df51b | 20403 | { |
891d2f0b | 20404 | unsigned int dummy; |
4c2df51b | 20405 | |
3019eac3 | 20406 | if (DW_BLOCK (attr)->data[0] == DW_OP_addr) |
c8a7a66f TT |
20407 | SET_SYMBOL_VALUE_ADDRESS |
20408 | (sym, cu->header.read_address (objfile->obfd, | |
20409 | DW_BLOCK (attr)->data + 1, | |
20410 | &dummy)); | |
3019eac3 | 20411 | else |
38583298 TT |
20412 | SET_SYMBOL_VALUE_ADDRESS |
20413 | (sym, read_addr_index_from_leb128 (cu, DW_BLOCK (attr)->data + 1, | |
20414 | &dummy)); | |
f1e6e072 | 20415 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; |
4c2df51b | 20416 | fixup_symbol_section (sym, objfile); |
6a053cb1 TT |
20417 | SET_SYMBOL_VALUE_ADDRESS |
20418 | (sym, | |
20419 | SYMBOL_VALUE_ADDRESS (sym) | |
20420 | + objfile->section_offsets[SYMBOL_SECTION (sym)]); | |
4c2df51b DJ |
20421 | return; |
20422 | } | |
20423 | ||
20424 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
20425 | expression evaluator, and use LOC_COMPUTED only when necessary | |
20426 | (i.e. when the value of a register or memory location is | |
20427 | referenced, or a thread-local block, etc.). Then again, it might | |
20428 | not be worthwhile. I'm assuming that it isn't unless performance | |
20429 | or memory numbers show me otherwise. */ | |
20430 | ||
f1e6e072 | 20431 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 20432 | |
f1e6e072 | 20433 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 20434 | cu->has_loclist = true; |
4c2df51b DJ |
20435 | } |
20436 | ||
c906108c SS |
20437 | /* Given a pointer to a DWARF information entry, figure out if we need |
20438 | to make a symbol table entry for it, and if so, create a new entry | |
20439 | and return a pointer to it. | |
20440 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
20441 | used the passed type. |
20442 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
20443 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
20444 | |
20445 | static struct symbol * | |
5e2db402 TT |
20446 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
20447 | struct symbol *space) | |
c906108c | 20448 | { |
518817b3 SM |
20449 | struct dwarf2_per_objfile *dwarf2_per_objfile |
20450 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 20451 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3e29f34a | 20452 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
c906108c | 20453 | struct symbol *sym = NULL; |
15d034d0 | 20454 | const char *name; |
c906108c SS |
20455 | struct attribute *attr = NULL; |
20456 | struct attribute *attr2 = NULL; | |
e142c38c | 20457 | CORE_ADDR baseaddr; |
e37fd15a SW |
20458 | struct pending **list_to_add = NULL; |
20459 | ||
edb3359d | 20460 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 20461 | |
b3b3bada | 20462 | baseaddr = objfile->text_section_offset (); |
c906108c | 20463 | |
94af9270 | 20464 | name = dwarf2_name (die, cu); |
c906108c SS |
20465 | if (name) |
20466 | { | |
94af9270 | 20467 | const char *linkagename; |
34eaf542 | 20468 | int suppress_add = 0; |
94af9270 | 20469 | |
34eaf542 TT |
20470 | if (space) |
20471 | sym = space; | |
20472 | else | |
e623cf5d | 20473 | sym = allocate_symbol (objfile); |
c906108c | 20474 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
20475 | |
20476 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 20477 | sym->set_language (cu->language, &objfile->objfile_obstack); |
94af9270 | 20478 | linkagename = dwarf2_physname (name, die, cu); |
4d4eaa30 | 20479 | sym->compute_and_set_names (linkagename, false, objfile->per_bfd); |
c906108c | 20480 | |
f55ee35c JK |
20481 | /* Fortran does not have mangling standard and the mangling does differ |
20482 | between gfortran, iFort etc. */ | |
20483 | if (cu->language == language_fortran | |
468c0cbb CB |
20484 | && symbol_get_demangled_name (sym) == NULL) |
20485 | symbol_set_demangled_name (sym, | |
cfc594ee | 20486 | dwarf2_full_name (name, die, cu), |
29df156d | 20487 | NULL); |
f55ee35c | 20488 | |
c906108c | 20489 | /* Default assumptions. |
c5aa993b | 20490 | Use the passed type or decode it from the die. */ |
176620f1 | 20491 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 20492 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
20493 | if (type != NULL) |
20494 | SYMBOL_TYPE (sym) = type; | |
20495 | else | |
e7c27a73 | 20496 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
20497 | attr = dwarf2_attr (die, |
20498 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
20499 | cu); | |
435d3d88 | 20500 | if (attr != nullptr) |
c906108c SS |
20501 | { |
20502 | SYMBOL_LINE (sym) = DW_UNSND (attr); | |
20503 | } | |
cb1df416 | 20504 | |
edb3359d DJ |
20505 | attr = dwarf2_attr (die, |
20506 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
20507 | cu); | |
435d3d88 | 20508 | if (attr != nullptr) |
cb1df416 | 20509 | { |
ecfb656c | 20510 | file_name_index file_index = (file_name_index) DW_UNSND (attr); |
8c43009f | 20511 | struct file_entry *fe; |
9a619af0 | 20512 | |
ecfb656c PA |
20513 | if (cu->line_header != NULL) |
20514 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
20515 | else |
20516 | fe = NULL; | |
20517 | ||
20518 | if (fe == NULL) | |
b98664d3 | 20519 | complaint (_("file index out of range")); |
8c43009f PA |
20520 | else |
20521 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
20522 | } |
20523 | ||
c906108c SS |
20524 | switch (die->tag) |
20525 | { | |
20526 | case DW_TAG_label: | |
e142c38c | 20527 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 20528 | if (attr != nullptr) |
3e29f34a MR |
20529 | { |
20530 | CORE_ADDR addr; | |
20531 | ||
cd6c91b4 | 20532 | addr = attr->value_as_address (); |
3e29f34a | 20533 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
38583298 | 20534 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
3e29f34a | 20535 | } |
0f5238ed TT |
20536 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
20537 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
f1e6e072 | 20538 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
d3cb6808 | 20539 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
20540 | break; |
20541 | case DW_TAG_subprogram: | |
20542 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20543 | finish_block. */ | |
f1e6e072 | 20544 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 20545 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
2cfa0c8d | 20546 | if ((attr2 && (DW_UNSND (attr2) != 0)) |
0a4b0913 AB |
20547 | || cu->language == language_ada |
20548 | || cu->language == language_fortran) | |
c906108c | 20549 | { |
2cfa0c8d | 20550 | /* Subprograms marked external are stored as a global symbol. |
0a4b0913 AB |
20551 | Ada and Fortran subprograms, whether marked external or |
20552 | not, are always stored as a global symbol, because we want | |
20553 | to be able to access them globally. For instance, we want | |
20554 | to be able to break on a nested subprogram without having | |
20555 | to specify the context. */ | |
c24bdb02 | 20556 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
20557 | } |
20558 | else | |
20559 | { | |
e37fd15a | 20560 | list_to_add = cu->list_in_scope; |
c906108c SS |
20561 | } |
20562 | break; | |
edb3359d DJ |
20563 | case DW_TAG_inlined_subroutine: |
20564 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
20565 | finish_block. */ | |
f1e6e072 | 20566 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 20567 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 20568 | list_to_add = cu->list_in_scope; |
edb3359d | 20569 | break; |
34eaf542 TT |
20570 | case DW_TAG_template_value_param: |
20571 | suppress_add = 1; | |
20572 | /* Fall through. */ | |
72929c62 | 20573 | case DW_TAG_constant: |
c906108c | 20574 | case DW_TAG_variable: |
254e6b9e | 20575 | case DW_TAG_member: |
0963b4bd MS |
20576 | /* Compilation with minimal debug info may result in |
20577 | variables with missing type entries. Change the | |
20578 | misleading `void' type to something sensible. */ | |
c906108c | 20579 | if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_VOID) |
46a4882b | 20580 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 20581 | |
e142c38c | 20582 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
20583 | /* In the case of DW_TAG_member, we should only be called for |
20584 | static const members. */ | |
20585 | if (die->tag == DW_TAG_member) | |
20586 | { | |
3863f96c DE |
20587 | /* dwarf2_add_field uses die_is_declaration, |
20588 | so we do the same. */ | |
254e6b9e DE |
20589 | gdb_assert (die_is_declaration (die, cu)); |
20590 | gdb_assert (attr); | |
20591 | } | |
435d3d88 | 20592 | if (attr != nullptr) |
c906108c | 20593 | { |
e7c27a73 | 20594 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 20595 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 20596 | if (!suppress_add) |
34eaf542 TT |
20597 | { |
20598 | if (attr2 && (DW_UNSND (attr2) != 0)) | |
c24bdb02 | 20599 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 20600 | else |
e37fd15a | 20601 | list_to_add = cu->list_in_scope; |
34eaf542 | 20602 | } |
c906108c SS |
20603 | break; |
20604 | } | |
e142c38c | 20605 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 20606 | if (attr != nullptr) |
c906108c | 20607 | { |
e7c27a73 | 20608 | var_decode_location (attr, sym, cu); |
e142c38c | 20609 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
20610 | |
20611 | /* Fortran explicitly imports any global symbols to the local | |
20612 | scope by DW_TAG_common_block. */ | |
20613 | if (cu->language == language_fortran && die->parent | |
20614 | && die->parent->tag == DW_TAG_common_block) | |
20615 | attr2 = NULL; | |
20616 | ||
caac4577 JG |
20617 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20618 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
20619 | && !dwarf2_per_objfile->has_section_at_zero) | |
20620 | { | |
20621 | /* When a static variable is eliminated by the linker, | |
20622 | the corresponding debug information is not stripped | |
20623 | out, but the variable address is set to null; | |
20624 | do not add such variables into symbol table. */ | |
20625 | } | |
20626 | else if (attr2 && (DW_UNSND (attr2) != 0)) | |
1c809c68 | 20627 | { |
4b610737 TT |
20628 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
20629 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
20630 | && dwarf2_per_objfile->can_copy) | |
20631 | { | |
20632 | /* A global static variable might be subject to | |
20633 | copy relocation. We first check for a local | |
20634 | minsym, though, because maybe the symbol was | |
20635 | marked hidden, in which case this would not | |
20636 | apply. */ | |
20637 | bound_minimal_symbol found | |
20638 | = (lookup_minimal_symbol_linkage | |
987012b8 | 20639 | (sym->linkage_name (), objfile)); |
4b610737 TT |
20640 | if (found.minsym != nullptr) |
20641 | sym->maybe_copied = 1; | |
20642 | } | |
f55ee35c | 20643 | |
1c809c68 TT |
20644 | /* A variable with DW_AT_external is never static, |
20645 | but it may be block-scoped. */ | |
804d2729 | 20646 | list_to_add |
c24bdb02 KS |
20647 | = ((cu->list_in_scope |
20648 | == cu->get_builder ()->get_file_symbols ()) | |
20649 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20650 | : cu->list_in_scope); |
1c809c68 | 20651 | } |
c906108c | 20652 | else |
e37fd15a | 20653 | list_to_add = cu->list_in_scope; |
c906108c SS |
20654 | } |
20655 | else | |
20656 | { | |
20657 | /* We do not know the address of this symbol. | |
c5aa993b JM |
20658 | If it is an external symbol and we have type information |
20659 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
20660 | The address of the variable will then be determined from | |
20661 | the minimal symbol table whenever the variable is | |
20662 | referenced. */ | |
e142c38c | 20663 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
20664 | |
20665 | /* Fortran explicitly imports any global symbols to the local | |
20666 | scope by DW_TAG_common_block. */ | |
20667 | if (cu->language == language_fortran && die->parent | |
20668 | && die->parent->tag == DW_TAG_common_block) | |
20669 | { | |
20670 | /* SYMBOL_CLASS doesn't matter here because | |
20671 | read_common_block is going to reset it. */ | |
20672 | if (!suppress_add) | |
20673 | list_to_add = cu->list_in_scope; | |
20674 | } | |
20675 | else if (attr2 && (DW_UNSND (attr2) != 0) | |
20676 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) | |
c906108c | 20677 | { |
0fe7935b DJ |
20678 | /* A variable with DW_AT_external is never static, but it |
20679 | may be block-scoped. */ | |
804d2729 | 20680 | list_to_add |
c24bdb02 KS |
20681 | = ((cu->list_in_scope |
20682 | == cu->get_builder ()->get_file_symbols ()) | |
20683 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 20684 | : cu->list_in_scope); |
0fe7935b | 20685 | |
f1e6e072 | 20686 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 20687 | } |
442ddf59 JK |
20688 | else if (!die_is_declaration (die, cu)) |
20689 | { | |
20690 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
20691 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
20692 | if (!suppress_add) |
20693 | list_to_add = cu->list_in_scope; | |
442ddf59 | 20694 | } |
c906108c SS |
20695 | } |
20696 | break; | |
20697 | case DW_TAG_formal_parameter: | |
a60f3166 TT |
20698 | { |
20699 | /* If we are inside a function, mark this as an argument. If | |
20700 | not, we might be looking at an argument to an inlined function | |
20701 | when we do not have enough information to show inlined frames; | |
20702 | pretend it's a local variable in that case so that the user can | |
20703 | still see it. */ | |
804d2729 | 20704 | struct context_stack *curr |
c24bdb02 | 20705 | = cu->get_builder ()->get_current_context_stack (); |
a60f3166 TT |
20706 | if (curr != nullptr && curr->name != nullptr) |
20707 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
20708 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 20709 | if (attr != nullptr) |
a60f3166 TT |
20710 | { |
20711 | var_decode_location (attr, sym, cu); | |
20712 | } | |
20713 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 20714 | if (attr != nullptr) |
a60f3166 TT |
20715 | { |
20716 | dwarf2_const_value (attr, sym, cu); | |
20717 | } | |
f346a30d | 20718 | |
a60f3166 TT |
20719 | list_to_add = cu->list_in_scope; |
20720 | } | |
c906108c SS |
20721 | break; |
20722 | case DW_TAG_unspecified_parameters: | |
20723 | /* From varargs functions; gdb doesn't seem to have any | |
20724 | interest in this information, so just ignore it for now. | |
20725 | (FIXME?) */ | |
20726 | break; | |
34eaf542 TT |
20727 | case DW_TAG_template_type_param: |
20728 | suppress_add = 1; | |
20729 | /* Fall through. */ | |
c906108c | 20730 | case DW_TAG_class_type: |
680b30c7 | 20731 | case DW_TAG_interface_type: |
c906108c SS |
20732 | case DW_TAG_structure_type: |
20733 | case DW_TAG_union_type: | |
72019c9c | 20734 | case DW_TAG_set_type: |
c906108c | 20735 | case DW_TAG_enumeration_type: |
f1e6e072 | 20736 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20737 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 20738 | |
63d06c5c | 20739 | { |
9c37b5ae | 20740 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
20741 | really ever be static objects: otherwise, if you try |
20742 | to, say, break of a class's method and you're in a file | |
20743 | which doesn't mention that class, it won't work unless | |
20744 | the check for all static symbols in lookup_symbol_aux | |
20745 | saves you. See the OtherFileClass tests in | |
20746 | gdb.c++/namespace.exp. */ | |
20747 | ||
e37fd15a | 20748 | if (!suppress_add) |
34eaf542 | 20749 | { |
c24bdb02 | 20750 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 20751 | list_to_add |
c24bdb02 | 20752 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 20753 | && cu->language == language_cplus |
c24bdb02 | 20754 | ? builder->get_global_symbols () |
804d2729 | 20755 | : cu->list_in_scope); |
63d06c5c | 20756 | |
64382290 | 20757 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 20758 | ... }" also defines a typedef for "foo". */ |
64382290 | 20759 | if (cu->language == language_cplus |
45280282 | 20760 | || cu->language == language_ada |
c44af4eb TT |
20761 | || cu->language == language_d |
20762 | || cu->language == language_rust) | |
64382290 TT |
20763 | { |
20764 | /* The symbol's name is already allocated along | |
20765 | with this objfile, so we don't need to | |
20766 | duplicate it for the type. */ | |
20767 | if (TYPE_NAME (SYMBOL_TYPE (sym)) == 0) | |
987012b8 | 20768 | TYPE_NAME (SYMBOL_TYPE (sym)) = sym->search_name (); |
64382290 | 20769 | } |
63d06c5c DC |
20770 | } |
20771 | } | |
c906108c SS |
20772 | break; |
20773 | case DW_TAG_typedef: | |
f1e6e072 | 20774 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 20775 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20776 | list_to_add = cu->list_in_scope; |
63d06c5c | 20777 | break; |
c906108c | 20778 | case DW_TAG_base_type: |
a02abb62 | 20779 | case DW_TAG_subrange_type: |
f1e6e072 | 20780 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 20781 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 20782 | list_to_add = cu->list_in_scope; |
c906108c SS |
20783 | break; |
20784 | case DW_TAG_enumerator: | |
e142c38c | 20785 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 20786 | if (attr != nullptr) |
c906108c | 20787 | { |
e7c27a73 | 20788 | dwarf2_const_value (attr, sym, cu); |
c906108c | 20789 | } |
63d06c5c DC |
20790 | { |
20791 | /* NOTE: carlton/2003-11-10: See comment above in the | |
20792 | DW_TAG_class_type, etc. block. */ | |
20793 | ||
804d2729 | 20794 | list_to_add |
c24bdb02 | 20795 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 20796 | && cu->language == language_cplus |
c24bdb02 | 20797 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 20798 | : cu->list_in_scope); |
63d06c5c | 20799 | } |
c906108c | 20800 | break; |
74921315 | 20801 | case DW_TAG_imported_declaration: |
5c4e30ca | 20802 | case DW_TAG_namespace: |
f1e6e072 | 20803 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 20804 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 20805 | break; |
530e8392 KB |
20806 | case DW_TAG_module: |
20807 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
20808 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 20809 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 20810 | break; |
4357ac6c | 20811 | case DW_TAG_common_block: |
f1e6e072 | 20812 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 20813 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 20814 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 20815 | break; |
c906108c SS |
20816 | default: |
20817 | /* Not a tag we recognize. Hopefully we aren't processing | |
20818 | trash data, but since we must specifically ignore things | |
20819 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 20820 | this point. */ |
b98664d3 | 20821 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 20822 | dwarf_tag_name (die->tag)); |
c906108c SS |
20823 | break; |
20824 | } | |
df8a16a1 | 20825 | |
e37fd15a SW |
20826 | if (suppress_add) |
20827 | { | |
20828 | sym->hash_next = objfile->template_symbols; | |
20829 | objfile->template_symbols = sym; | |
20830 | list_to_add = NULL; | |
20831 | } | |
20832 | ||
20833 | if (list_to_add != NULL) | |
d3cb6808 | 20834 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 20835 | |
df8a16a1 DJ |
20836 | /* For the benefit of old versions of GCC, check for anonymous |
20837 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 20838 | if (!cu->processing_has_namespace_info |
94af9270 | 20839 | && cu->language == language_cplus) |
c24bdb02 | 20840 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
20841 | } |
20842 | return (sym); | |
20843 | } | |
20844 | ||
98bfdba5 PA |
20845 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
20846 | zero-extend it as appropriate for the symbol's type. The DWARF | |
20847 | standard (v4) is not entirely clear about the meaning of using | |
20848 | DW_FORM_dataN for a constant with a signed type, where the type is | |
20849 | wider than the data. The conclusion of a discussion on the DWARF | |
20850 | list was that this is unspecified. We choose to always zero-extend | |
20851 | because that is the interpretation long in use by GCC. */ | |
c906108c | 20852 | |
98bfdba5 | 20853 | static gdb_byte * |
ff39bb5e | 20854 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 20855 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 20856 | { |
518817b3 | 20857 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
e17a4113 UW |
20858 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
20859 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
98bfdba5 PA |
20860 | LONGEST l = DW_UNSND (attr); |
20861 | ||
20862 | if (bits < sizeof (*value) * 8) | |
20863 | { | |
20864 | l &= ((LONGEST) 1 << bits) - 1; | |
20865 | *value = l; | |
20866 | } | |
20867 | else if (bits == sizeof (*value) * 8) | |
20868 | *value = l; | |
20869 | else | |
20870 | { | |
224c3ddb | 20871 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
20872 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
20873 | return bytes; | |
20874 | } | |
20875 | ||
20876 | return NULL; | |
20877 | } | |
20878 | ||
20879 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
20880 | the value does not fit in *VALUE, set *BYTES - either already | |
20881 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
20882 | or, set *BATON, if we translated the constant to a location | |
20883 | expression. */ | |
20884 | ||
20885 | static void | |
ff39bb5e | 20886 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
20887 | const char *name, struct obstack *obstack, |
20888 | struct dwarf2_cu *cu, | |
d521ce57 | 20889 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
20890 | struct dwarf2_locexpr_baton **baton) |
20891 | { | |
518817b3 | 20892 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
98bfdba5 | 20893 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 20894 | struct dwarf_block *blk; |
98bfdba5 PA |
20895 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
20896 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
20897 | ||
20898 | *value = 0; | |
20899 | *bytes = NULL; | |
20900 | *baton = NULL; | |
c906108c SS |
20901 | |
20902 | switch (attr->form) | |
20903 | { | |
20904 | case DW_FORM_addr: | |
336d760d | 20905 | case DW_FORM_addrx: |
3019eac3 | 20906 | case DW_FORM_GNU_addr_index: |
ac56253d | 20907 | { |
ac56253d TT |
20908 | gdb_byte *data; |
20909 | ||
98bfdba5 PA |
20910 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
20911 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 20912 | cu_header->addr_size, |
98bfdba5 | 20913 | TYPE_LENGTH (type)); |
ac56253d TT |
20914 | /* Symbols of this form are reasonably rare, so we just |
20915 | piggyback on the existing location code rather than writing | |
20916 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 20917 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
98bfdba5 PA |
20918 | (*baton)->per_cu = cu->per_cu; |
20919 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 20920 | |
98bfdba5 | 20921 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 20922 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 20923 | (*baton)->data = data; |
ac56253d TT |
20924 | |
20925 | data[0] = DW_OP_addr; | |
20926 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
20927 | byte_order, DW_ADDR (attr)); | |
20928 | data[cu_header->addr_size + 1] = DW_OP_stack_value; | |
ac56253d | 20929 | } |
c906108c | 20930 | break; |
4ac36638 | 20931 | case DW_FORM_string: |
93b5768b | 20932 | case DW_FORM_strp: |
cf532bd1 | 20933 | case DW_FORM_strx: |
3019eac3 | 20934 | case DW_FORM_GNU_str_index: |
36586728 | 20935 | case DW_FORM_GNU_strp_alt: |
98bfdba5 PA |
20936 | /* DW_STRING is already allocated on the objfile obstack, point |
20937 | directly to it. */ | |
d521ce57 | 20938 | *bytes = (const gdb_byte *) DW_STRING (attr); |
93b5768b | 20939 | break; |
c906108c SS |
20940 | case DW_FORM_block1: |
20941 | case DW_FORM_block2: | |
20942 | case DW_FORM_block4: | |
20943 | case DW_FORM_block: | |
2dc7f7b3 | 20944 | case DW_FORM_exprloc: |
0224619f | 20945 | case DW_FORM_data16: |
c906108c | 20946 | blk = DW_BLOCK (attr); |
98bfdba5 PA |
20947 | if (TYPE_LENGTH (type) != blk->size) |
20948 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
20949 | TYPE_LENGTH (type)); | |
20950 | *bytes = blk->data; | |
c906108c | 20951 | break; |
2df3850c JM |
20952 | |
20953 | /* The DW_AT_const_value attributes are supposed to carry the | |
20954 | symbol's value "represented as it would be on the target | |
20955 | architecture." By the time we get here, it's already been | |
20956 | converted to host endianness, so we just need to sign- or | |
20957 | zero-extend it as appropriate. */ | |
20958 | case DW_FORM_data1: | |
3aef2284 | 20959 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 20960 | break; |
c906108c | 20961 | case DW_FORM_data2: |
3aef2284 | 20962 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 20963 | break; |
c906108c | 20964 | case DW_FORM_data4: |
3aef2284 | 20965 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 20966 | break; |
c906108c | 20967 | case DW_FORM_data8: |
3aef2284 | 20968 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
20969 | break; |
20970 | ||
c906108c | 20971 | case DW_FORM_sdata: |
663c44ac | 20972 | case DW_FORM_implicit_const: |
98bfdba5 | 20973 | *value = DW_SND (attr); |
2df3850c JM |
20974 | break; |
20975 | ||
c906108c | 20976 | case DW_FORM_udata: |
98bfdba5 | 20977 | *value = DW_UNSND (attr); |
c906108c | 20978 | break; |
2df3850c | 20979 | |
c906108c | 20980 | default: |
b98664d3 | 20981 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 20982 | dwarf_form_name (attr->form)); |
98bfdba5 | 20983 | *value = 0; |
c906108c SS |
20984 | break; |
20985 | } | |
20986 | } | |
20987 | ||
2df3850c | 20988 | |
98bfdba5 PA |
20989 | /* Copy constant value from an attribute to a symbol. */ |
20990 | ||
2df3850c | 20991 | static void |
ff39bb5e | 20992 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 20993 | struct dwarf2_cu *cu) |
2df3850c | 20994 | { |
518817b3 | 20995 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
12df843f | 20996 | LONGEST value; |
d521ce57 | 20997 | const gdb_byte *bytes; |
98bfdba5 | 20998 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 20999 | |
98bfdba5 | 21000 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 21001 | sym->print_name (), |
98bfdba5 PA |
21002 | &objfile->objfile_obstack, cu, |
21003 | &value, &bytes, &baton); | |
2df3850c | 21004 | |
98bfdba5 PA |
21005 | if (baton != NULL) |
21006 | { | |
98bfdba5 | 21007 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 21008 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
21009 | } |
21010 | else if (bytes != NULL) | |
21011 | { | |
21012 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 21013 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
21014 | } |
21015 | else | |
21016 | { | |
21017 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 21018 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 21019 | } |
2df3850c JM |
21020 | } |
21021 | ||
c906108c SS |
21022 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
21023 | ||
21024 | static struct type * | |
e7c27a73 | 21025 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21026 | { |
c906108c | 21027 | struct attribute *type_attr; |
c906108c | 21028 | |
e142c38c | 21029 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
21030 | if (!type_attr) |
21031 | { | |
518817b3 | 21032 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21033 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 21034 | return objfile_type (objfile)->builtin_void; |
c906108c | 21035 | } |
348e048f | 21036 | |
673bfd45 | 21037 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21038 | } |
21039 | ||
b4ba55a1 JB |
21040 | /* True iff CU's producer generates GNAT Ada auxiliary information |
21041 | that allows to find parallel types through that information instead | |
21042 | of having to do expensive parallel lookups by type name. */ | |
21043 | ||
21044 | static int | |
21045 | need_gnat_info (struct dwarf2_cu *cu) | |
21046 | { | |
de4cb04a JB |
21047 | /* Assume that the Ada compiler was GNAT, which always produces |
21048 | the auxiliary information. */ | |
21049 | return (cu->language == language_ada); | |
b4ba55a1 JB |
21050 | } |
21051 | ||
b4ba55a1 JB |
21052 | /* Return the auxiliary type of the die in question using its |
21053 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
21054 | attribute is not present. */ | |
21055 | ||
21056 | static struct type * | |
21057 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
21058 | { | |
b4ba55a1 | 21059 | struct attribute *type_attr; |
b4ba55a1 JB |
21060 | |
21061 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
21062 | if (!type_attr) | |
21063 | return NULL; | |
21064 | ||
673bfd45 | 21065 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
21066 | } |
21067 | ||
21068 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
21069 | descriptive type accordingly. */ | |
21070 | ||
21071 | static void | |
21072 | set_descriptive_type (struct type *type, struct die_info *die, | |
21073 | struct dwarf2_cu *cu) | |
21074 | { | |
21075 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
21076 | ||
21077 | if (descriptive_type) | |
21078 | { | |
21079 | ALLOCATE_GNAT_AUX_TYPE (type); | |
21080 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
21081 | } | |
21082 | } | |
21083 | ||
c906108c SS |
21084 | /* Return the containing type of the die in question using its |
21085 | DW_AT_containing_type attribute. */ | |
21086 | ||
21087 | static struct type * | |
e7c27a73 | 21088 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21089 | { |
c906108c | 21090 | struct attribute *type_attr; |
518817b3 | 21091 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
c906108c | 21092 | |
e142c38c | 21093 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
21094 | if (!type_attr) |
21095 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 21096 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 21097 | |
673bfd45 | 21098 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
21099 | } |
21100 | ||
ac9ec31b DE |
21101 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
21102 | ||
21103 | static struct type * | |
21104 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
21105 | { | |
518817b3 SM |
21106 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21107 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b | 21108 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
528e1572 | 21109 | char *saved; |
ac9ec31b | 21110 | |
528e1572 SM |
21111 | std::string message |
21112 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
21113 | objfile_name (objfile), | |
21114 | sect_offset_str (cu->header.sect_off), | |
21115 | sect_offset_str (die->sect_off)); | |
efba19b0 | 21116 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 21117 | |
19f392bc | 21118 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
21119 | } |
21120 | ||
673bfd45 | 21121 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
21122 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
21123 | DW_AT_containing_type. | |
673bfd45 DE |
21124 | If there is no type substitute an error marker. */ |
21125 | ||
c906108c | 21126 | static struct type * |
ff39bb5e | 21127 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 21128 | struct dwarf2_cu *cu) |
c906108c | 21129 | { |
518817b3 SM |
21130 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21131 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 21132 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
f792889a DJ |
21133 | struct type *this_type; |
21134 | ||
ac9ec31b DE |
21135 | gdb_assert (attr->name == DW_AT_type |
21136 | || attr->name == DW_AT_GNAT_descriptive_type | |
21137 | || attr->name == DW_AT_containing_type); | |
21138 | ||
673bfd45 DE |
21139 | /* First see if we have it cached. */ |
21140 | ||
36586728 TT |
21141 | if (attr->form == DW_FORM_GNU_ref_alt) |
21142 | { | |
21143 | struct dwarf2_per_cu_data *per_cu; | |
9c541725 | 21144 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
36586728 | 21145 | |
ed2dc618 SM |
21146 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, |
21147 | dwarf2_per_objfile); | |
9c541725 | 21148 | this_type = get_die_type_at_offset (sect_off, per_cu); |
36586728 | 21149 | } |
cd6c91b4 | 21150 | else if (attr->form_is_ref ()) |
673bfd45 | 21151 | { |
9c541725 | 21152 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
673bfd45 | 21153 | |
9c541725 | 21154 | this_type = get_die_type_at_offset (sect_off, cu->per_cu); |
673bfd45 | 21155 | } |
55f1336d | 21156 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 21157 | { |
ac9ec31b | 21158 | ULONGEST signature = DW_SIGNATURE (attr); |
673bfd45 | 21159 | |
ac9ec31b | 21160 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
21161 | } |
21162 | else | |
21163 | { | |
b98664d3 | 21164 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
21165 | " at %s [in module %s]"), |
21166 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 21167 | objfile_name (objfile)); |
ac9ec31b | 21168 | return build_error_marker_type (cu, die); |
673bfd45 DE |
21169 | } |
21170 | ||
21171 | /* If not cached we need to read it in. */ | |
21172 | ||
21173 | if (this_type == NULL) | |
21174 | { | |
ac9ec31b | 21175 | struct die_info *type_die = NULL; |
673bfd45 DE |
21176 | struct dwarf2_cu *type_cu = cu; |
21177 | ||
cd6c91b4 | 21178 | if (attr->form_is_ref ()) |
ac9ec31b DE |
21179 | type_die = follow_die_ref (die, attr, &type_cu); |
21180 | if (type_die == NULL) | |
21181 | return build_error_marker_type (cu, die); | |
21182 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
21183 | from an inter-CU reference and the type's CU got expanded before |
21184 | ours. */ | |
ac9ec31b | 21185 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
21186 | } |
21187 | ||
21188 | /* If we still don't have a type use an error marker. */ | |
21189 | ||
21190 | if (this_type == NULL) | |
ac9ec31b | 21191 | return build_error_marker_type (cu, die); |
673bfd45 | 21192 | |
f792889a | 21193 | return this_type; |
c906108c SS |
21194 | } |
21195 | ||
673bfd45 DE |
21196 | /* Return the type in DIE, CU. |
21197 | Returns NULL for invalid types. | |
21198 | ||
02142a6c | 21199 | This first does a lookup in die_type_hash, |
673bfd45 DE |
21200 | and only reads the die in if necessary. |
21201 | ||
21202 | NOTE: This can be called when reading in partial or full symbols. */ | |
21203 | ||
f792889a | 21204 | static struct type * |
e7c27a73 | 21205 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 21206 | { |
f792889a DJ |
21207 | struct type *this_type; |
21208 | ||
21209 | this_type = get_die_type (die, cu); | |
21210 | if (this_type) | |
21211 | return this_type; | |
21212 | ||
673bfd45 DE |
21213 | return read_type_die_1 (die, cu); |
21214 | } | |
21215 | ||
21216 | /* Read the type in DIE, CU. | |
21217 | Returns NULL for invalid types. */ | |
21218 | ||
21219 | static struct type * | |
21220 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
21221 | { | |
21222 | struct type *this_type = NULL; | |
21223 | ||
c906108c SS |
21224 | switch (die->tag) |
21225 | { | |
21226 | case DW_TAG_class_type: | |
680b30c7 | 21227 | case DW_TAG_interface_type: |
c906108c SS |
21228 | case DW_TAG_structure_type: |
21229 | case DW_TAG_union_type: | |
f792889a | 21230 | this_type = read_structure_type (die, cu); |
c906108c SS |
21231 | break; |
21232 | case DW_TAG_enumeration_type: | |
f792889a | 21233 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
21234 | break; |
21235 | case DW_TAG_subprogram: | |
21236 | case DW_TAG_subroutine_type: | |
edb3359d | 21237 | case DW_TAG_inlined_subroutine: |
f792889a | 21238 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
21239 | break; |
21240 | case DW_TAG_array_type: | |
f792889a | 21241 | this_type = read_array_type (die, cu); |
c906108c | 21242 | break; |
72019c9c | 21243 | case DW_TAG_set_type: |
f792889a | 21244 | this_type = read_set_type (die, cu); |
72019c9c | 21245 | break; |
c906108c | 21246 | case DW_TAG_pointer_type: |
f792889a | 21247 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
21248 | break; |
21249 | case DW_TAG_ptr_to_member_type: | |
f792889a | 21250 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
21251 | break; |
21252 | case DW_TAG_reference_type: | |
4297a3f0 AV |
21253 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
21254 | break; | |
21255 | case DW_TAG_rvalue_reference_type: | |
21256 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
21257 | break; |
21258 | case DW_TAG_const_type: | |
f792889a | 21259 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
21260 | break; |
21261 | case DW_TAG_volatile_type: | |
f792889a | 21262 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 21263 | break; |
06d66ee9 TT |
21264 | case DW_TAG_restrict_type: |
21265 | this_type = read_tag_restrict_type (die, cu); | |
21266 | break; | |
c906108c | 21267 | case DW_TAG_string_type: |
f792889a | 21268 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
21269 | break; |
21270 | case DW_TAG_typedef: | |
f792889a | 21271 | this_type = read_typedef (die, cu); |
c906108c | 21272 | break; |
a02abb62 | 21273 | case DW_TAG_subrange_type: |
f792889a | 21274 | this_type = read_subrange_type (die, cu); |
a02abb62 | 21275 | break; |
c906108c | 21276 | case DW_TAG_base_type: |
f792889a | 21277 | this_type = read_base_type (die, cu); |
c906108c | 21278 | break; |
81a17f79 | 21279 | case DW_TAG_unspecified_type: |
f792889a | 21280 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 21281 | break; |
0114d602 DJ |
21282 | case DW_TAG_namespace: |
21283 | this_type = read_namespace_type (die, cu); | |
21284 | break; | |
f55ee35c JK |
21285 | case DW_TAG_module: |
21286 | this_type = read_module_type (die, cu); | |
21287 | break; | |
a2c2acaf MW |
21288 | case DW_TAG_atomic_type: |
21289 | this_type = read_tag_atomic_type (die, cu); | |
21290 | break; | |
c906108c | 21291 | default: |
b98664d3 | 21292 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 21293 | dwarf_tag_name (die->tag)); |
c906108c SS |
21294 | break; |
21295 | } | |
63d06c5c | 21296 | |
f792889a | 21297 | return this_type; |
63d06c5c DC |
21298 | } |
21299 | ||
abc72ce4 DE |
21300 | /* See if we can figure out if the class lives in a namespace. We do |
21301 | this by looking for a member function; its demangled name will | |
21302 | contain namespace info, if there is any. | |
21303 | Return the computed name or NULL. | |
21304 | Space for the result is allocated on the objfile's obstack. | |
21305 | This is the full-die version of guess_partial_die_structure_name. | |
21306 | In this case we know DIE has no useful parent. */ | |
21307 | ||
43816ebc | 21308 | static const char * |
abc72ce4 DE |
21309 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
21310 | { | |
21311 | struct die_info *spec_die; | |
21312 | struct dwarf2_cu *spec_cu; | |
21313 | struct die_info *child; | |
518817b3 | 21314 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
abc72ce4 DE |
21315 | |
21316 | spec_cu = cu; | |
21317 | spec_die = die_specification (die, &spec_cu); | |
21318 | if (spec_die != NULL) | |
21319 | { | |
21320 | die = spec_die; | |
21321 | cu = spec_cu; | |
21322 | } | |
21323 | ||
21324 | for (child = die->child; | |
21325 | child != NULL; | |
21326 | child = child->sibling) | |
21327 | { | |
21328 | if (child->tag == DW_TAG_subprogram) | |
21329 | { | |
73b9be8b | 21330 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 21331 | |
7d45c7c3 | 21332 | if (linkage_name != NULL) |
abc72ce4 | 21333 | { |
43816ebc TT |
21334 | gdb::unique_xmalloc_ptr<char> actual_name |
21335 | (language_class_name_from_physname (cu->language_defn, | |
21336 | linkage_name)); | |
21337 | const char *name = NULL; | |
abc72ce4 DE |
21338 | |
21339 | if (actual_name != NULL) | |
21340 | { | |
15d034d0 | 21341 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
21342 | |
21343 | if (die_name != NULL | |
43816ebc | 21344 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
21345 | { |
21346 | /* Strip off the class name from the full name. | |
21347 | We want the prefix. */ | |
21348 | int die_name_len = strlen (die_name); | |
43816ebc TT |
21349 | int actual_name_len = strlen (actual_name.get ()); |
21350 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
21351 | |
21352 | /* Test for '::' as a sanity check. */ | |
21353 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 21354 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 21355 | name = obstack_strndup ( |
e3b94546 | 21356 | &objfile->per_bfd->storage_obstack, |
43816ebc | 21357 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
21358 | } |
21359 | } | |
abc72ce4 DE |
21360 | return name; |
21361 | } | |
21362 | } | |
21363 | } | |
21364 | ||
21365 | return NULL; | |
21366 | } | |
21367 | ||
96408a79 SA |
21368 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
21369 | prefix part in such case. See | |
21370 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21371 | ||
a121b7c1 | 21372 | static const char * |
96408a79 SA |
21373 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
21374 | { | |
21375 | struct attribute *attr; | |
e6a959d6 | 21376 | const char *base; |
96408a79 SA |
21377 | |
21378 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
21379 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
21380 | return NULL; | |
21381 | ||
7d45c7c3 | 21382 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
21383 | return NULL; |
21384 | ||
73b9be8b | 21385 | attr = dw2_linkage_name_attr (die, cu); |
96408a79 SA |
21386 | if (attr == NULL || DW_STRING (attr) == NULL) |
21387 | return NULL; | |
21388 | ||
21389 | /* dwarf2_name had to be already called. */ | |
21390 | gdb_assert (DW_STRING_IS_CANONICAL (attr)); | |
21391 | ||
21392 | /* Strip the base name, keep any leading namespaces/classes. */ | |
21393 | base = strrchr (DW_STRING (attr), ':'); | |
21394 | if (base == NULL || base == DW_STRING (attr) || base[-1] != ':') | |
21395 | return ""; | |
21396 | ||
518817b3 | 21397 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
0cf9feb9 TT |
21398 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
21399 | DW_STRING (attr), | |
21400 | &base[-1] - DW_STRING (attr)); | |
96408a79 SA |
21401 | } |
21402 | ||
fdde2d81 | 21403 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 21404 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 21405 | |
0114d602 DJ |
21406 | For example, if we're within the method foo() in the following |
21407 | code: | |
21408 | ||
21409 | namespace N { | |
21410 | class C { | |
21411 | void foo () { | |
21412 | } | |
21413 | }; | |
21414 | } | |
21415 | ||
21416 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 21417 | |
0d5cff50 | 21418 | static const char * |
e142c38c | 21419 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 21420 | { |
518817b3 SM |
21421 | struct dwarf2_per_objfile *dwarf2_per_objfile |
21422 | = cu->per_cu->dwarf2_per_objfile; | |
0114d602 DJ |
21423 | struct die_info *parent, *spec_die; |
21424 | struct dwarf2_cu *spec_cu; | |
21425 | struct type *parent_type; | |
a121b7c1 | 21426 | const char *retval; |
63d06c5c | 21427 | |
9c37b5ae | 21428 | if (cu->language != language_cplus |
c44af4eb TT |
21429 | && cu->language != language_fortran && cu->language != language_d |
21430 | && cu->language != language_rust) | |
0114d602 DJ |
21431 | return ""; |
21432 | ||
96408a79 SA |
21433 | retval = anonymous_struct_prefix (die, cu); |
21434 | if (retval) | |
21435 | return retval; | |
21436 | ||
0114d602 DJ |
21437 | /* We have to be careful in the presence of DW_AT_specification. |
21438 | For example, with GCC 3.4, given the code | |
21439 | ||
21440 | namespace N { | |
21441 | void foo() { | |
21442 | // Definition of N::foo. | |
21443 | } | |
21444 | } | |
21445 | ||
21446 | then we'll have a tree of DIEs like this: | |
21447 | ||
21448 | 1: DW_TAG_compile_unit | |
21449 | 2: DW_TAG_namespace // N | |
21450 | 3: DW_TAG_subprogram // declaration of N::foo | |
21451 | 4: DW_TAG_subprogram // definition of N::foo | |
21452 | DW_AT_specification // refers to die #3 | |
21453 | ||
21454 | Thus, when processing die #4, we have to pretend that we're in | |
21455 | the context of its DW_AT_specification, namely the contex of die | |
21456 | #3. */ | |
21457 | spec_cu = cu; | |
21458 | spec_die = die_specification (die, &spec_cu); | |
21459 | if (spec_die == NULL) | |
21460 | parent = die->parent; | |
21461 | else | |
63d06c5c | 21462 | { |
0114d602 DJ |
21463 | parent = spec_die->parent; |
21464 | cu = spec_cu; | |
63d06c5c | 21465 | } |
0114d602 DJ |
21466 | |
21467 | if (parent == NULL) | |
21468 | return ""; | |
98bfdba5 PA |
21469 | else if (parent->building_fullname) |
21470 | { | |
21471 | const char *name; | |
21472 | const char *parent_name; | |
21473 | ||
21474 | /* It has been seen on RealView 2.2 built binaries, | |
21475 | DW_TAG_template_type_param types actually _defined_ as | |
21476 | children of the parent class: | |
21477 | ||
21478 | enum E {}; | |
21479 | template class <class Enum> Class{}; | |
21480 | Class<enum E> class_e; | |
21481 | ||
21482 | 1: DW_TAG_class_type (Class) | |
21483 | 2: DW_TAG_enumeration_type (E) | |
21484 | 3: DW_TAG_enumerator (enum1:0) | |
21485 | 3: DW_TAG_enumerator (enum2:1) | |
21486 | ... | |
21487 | 2: DW_TAG_template_type_param | |
21488 | DW_AT_type DW_FORM_ref_udata (E) | |
21489 | ||
21490 | Besides being broken debug info, it can put GDB into an | |
21491 | infinite loop. Consider: | |
21492 | ||
21493 | When we're building the full name for Class<E>, we'll start | |
21494 | at Class, and go look over its template type parameters, | |
21495 | finding E. We'll then try to build the full name of E, and | |
21496 | reach here. We're now trying to build the full name of E, | |
21497 | and look over the parent DIE for containing scope. In the | |
21498 | broken case, if we followed the parent DIE of E, we'd again | |
21499 | find Class, and once again go look at its template type | |
21500 | arguments, etc., etc. Simply don't consider such parent die | |
21501 | as source-level parent of this die (it can't be, the language | |
21502 | doesn't allow it), and break the loop here. */ | |
21503 | name = dwarf2_name (die, cu); | |
21504 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 21505 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
21506 | name ? name : "<unknown>", |
21507 | parent_name ? parent_name : "<unknown>"); | |
21508 | return ""; | |
21509 | } | |
63d06c5c | 21510 | else |
0114d602 DJ |
21511 | switch (parent->tag) |
21512 | { | |
63d06c5c | 21513 | case DW_TAG_namespace: |
0114d602 | 21514 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
21515 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
21516 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
21517 | Work around this problem here. */ | |
21518 | if (cu->language == language_cplus | |
e86ca25f | 21519 | && strcmp (TYPE_NAME (parent_type), "::") == 0) |
acebe513 | 21520 | return ""; |
0114d602 | 21521 | /* We give a name to even anonymous namespaces. */ |
e86ca25f | 21522 | return TYPE_NAME (parent_type); |
63d06c5c | 21523 | case DW_TAG_class_type: |
680b30c7 | 21524 | case DW_TAG_interface_type: |
63d06c5c | 21525 | case DW_TAG_structure_type: |
0114d602 | 21526 | case DW_TAG_union_type: |
f55ee35c | 21527 | case DW_TAG_module: |
0114d602 | 21528 | parent_type = read_type_die (parent, cu); |
e86ca25f TT |
21529 | if (TYPE_NAME (parent_type) != NULL) |
21530 | return TYPE_NAME (parent_type); | |
0114d602 DJ |
21531 | else |
21532 | /* An anonymous structure is only allowed non-static data | |
21533 | members; no typedefs, no member functions, et cetera. | |
21534 | So it does not need a prefix. */ | |
21535 | return ""; | |
abc72ce4 | 21536 | case DW_TAG_compile_unit: |
95554aad | 21537 | case DW_TAG_partial_unit: |
abc72ce4 DE |
21538 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
21539 | if (cu->language == language_cplus | |
fd5866f6 | 21540 | && !dwarf2_per_objfile->types.empty () |
abc72ce4 DE |
21541 | && die->child != NULL |
21542 | && (die->tag == DW_TAG_class_type | |
21543 | || die->tag == DW_TAG_structure_type | |
21544 | || die->tag == DW_TAG_union_type)) | |
21545 | { | |
43816ebc | 21546 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
21547 | if (name != NULL) |
21548 | return name; | |
21549 | } | |
21550 | return ""; | |
0a4b0913 AB |
21551 | case DW_TAG_subprogram: |
21552 | /* Nested subroutines in Fortran get a prefix with the name | |
21553 | of the parent's subroutine. */ | |
21554 | if (cu->language == language_fortran) | |
21555 | { | |
21556 | if ((die->tag == DW_TAG_subprogram) | |
21557 | && (dwarf2_name (parent, cu) != NULL)) | |
21558 | return dwarf2_name (parent, cu); | |
21559 | } | |
21560 | return determine_prefix (parent, cu); | |
3d567982 TT |
21561 | case DW_TAG_enumeration_type: |
21562 | parent_type = read_type_die (parent, cu); | |
21563 | if (TYPE_DECLARED_CLASS (parent_type)) | |
21564 | { | |
e86ca25f TT |
21565 | if (TYPE_NAME (parent_type) != NULL) |
21566 | return TYPE_NAME (parent_type); | |
3d567982 TT |
21567 | return ""; |
21568 | } | |
21569 | /* Fall through. */ | |
63d06c5c | 21570 | default: |
8176b9b8 | 21571 | return determine_prefix (parent, cu); |
63d06c5c | 21572 | } |
63d06c5c DC |
21573 | } |
21574 | ||
3e43a32a MS |
21575 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
21576 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
21577 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
21578 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
21579 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 21580 | |
f55ee35c | 21581 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
21582 | |
21583 | static char * | |
f55ee35c JK |
21584 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
21585 | int physname, struct dwarf2_cu *cu) | |
63d06c5c | 21586 | { |
f55ee35c | 21587 | const char *lead = ""; |
5c315b68 | 21588 | const char *sep; |
63d06c5c | 21589 | |
3e43a32a MS |
21590 | if (suffix == NULL || suffix[0] == '\0' |
21591 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 21592 | sep = ""; |
45280282 IB |
21593 | else if (cu->language == language_d) |
21594 | { | |
21595 | /* For D, the 'main' function could be defined in any module, but it | |
21596 | should never be prefixed. */ | |
21597 | if (strcmp (suffix, "D main") == 0) | |
21598 | { | |
21599 | prefix = ""; | |
21600 | sep = ""; | |
21601 | } | |
21602 | else | |
21603 | sep = "."; | |
21604 | } | |
f55ee35c JK |
21605 | else if (cu->language == language_fortran && physname) |
21606 | { | |
21607 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
21608 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
21609 | ||
21610 | lead = "__"; | |
21611 | sep = "_MOD_"; | |
21612 | } | |
987504bb JJ |
21613 | else |
21614 | sep = "::"; | |
63d06c5c | 21615 | |
6dd47d34 DE |
21616 | if (prefix == NULL) |
21617 | prefix = ""; | |
21618 | if (suffix == NULL) | |
21619 | suffix = ""; | |
21620 | ||
987504bb JJ |
21621 | if (obs == NULL) |
21622 | { | |
3e43a32a | 21623 | char *retval |
224c3ddb SM |
21624 | = ((char *) |
21625 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 21626 | |
f55ee35c JK |
21627 | strcpy (retval, lead); |
21628 | strcat (retval, prefix); | |
6dd47d34 DE |
21629 | strcat (retval, sep); |
21630 | strcat (retval, suffix); | |
63d06c5c DC |
21631 | return retval; |
21632 | } | |
987504bb JJ |
21633 | else |
21634 | { | |
21635 | /* We have an obstack. */ | |
f55ee35c | 21636 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 21637 | } |
63d06c5c DC |
21638 | } |
21639 | ||
c906108c SS |
21640 | /* Return sibling of die, NULL if no sibling. */ |
21641 | ||
f9aca02d | 21642 | static struct die_info * |
fba45db2 | 21643 | sibling_die (struct die_info *die) |
c906108c | 21644 | { |
639d11d3 | 21645 | return die->sibling; |
c906108c SS |
21646 | } |
21647 | ||
71c25dea TT |
21648 | /* Get name of a die, return NULL if not found. */ |
21649 | ||
15d034d0 TT |
21650 | static const char * |
21651 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
be1e3d3e | 21652 | struct objfile *objfile) |
71c25dea TT |
21653 | { |
21654 | if (name && cu->language == language_cplus) | |
21655 | { | |
2f408ecb | 21656 | std::string canon_name = cp_canonicalize_string (name); |
71c25dea | 21657 | |
2f408ecb | 21658 | if (!canon_name.empty ()) |
71c25dea | 21659 | { |
2f408ecb | 21660 | if (canon_name != name) |
be1e3d3e | 21661 | name = objfile->intern (canon_name); |
71c25dea TT |
21662 | } |
21663 | } | |
21664 | ||
21665 | return name; | |
c906108c SS |
21666 | } |
21667 | ||
96553a0c DE |
21668 | /* Get name of a die, return NULL if not found. |
21669 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 21670 | |
15d034d0 | 21671 | static const char * |
e142c38c | 21672 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
21673 | { |
21674 | struct attribute *attr; | |
518817b3 | 21675 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
9219021c | 21676 | |
e142c38c | 21677 | attr = dwarf2_attr (die, DW_AT_name, cu); |
53832f31 | 21678 | if ((!attr || !DW_STRING (attr)) |
96553a0c | 21679 | && die->tag != DW_TAG_namespace |
53832f31 TT |
21680 | && die->tag != DW_TAG_class_type |
21681 | && die->tag != DW_TAG_interface_type | |
21682 | && die->tag != DW_TAG_structure_type | |
21683 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
21684 | return NULL; |
21685 | ||
21686 | switch (die->tag) | |
21687 | { | |
21688 | case DW_TAG_compile_unit: | |
95554aad | 21689 | case DW_TAG_partial_unit: |
71c25dea TT |
21690 | /* Compilation units have a DW_AT_name that is a filename, not |
21691 | a source language identifier. */ | |
21692 | case DW_TAG_enumeration_type: | |
21693 | case DW_TAG_enumerator: | |
21694 | /* These tags always have simple identifiers already; no need | |
21695 | to canonicalize them. */ | |
21696 | return DW_STRING (attr); | |
907af001 | 21697 | |
96553a0c DE |
21698 | case DW_TAG_namespace: |
21699 | if (attr != NULL && DW_STRING (attr) != NULL) | |
21700 | return DW_STRING (attr); | |
21701 | return CP_ANONYMOUS_NAMESPACE_STR; | |
21702 | ||
907af001 UW |
21703 | case DW_TAG_class_type: |
21704 | case DW_TAG_interface_type: | |
21705 | case DW_TAG_structure_type: | |
21706 | case DW_TAG_union_type: | |
21707 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
21708 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
21709 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
21710 | and GCC 4.4. We work around this problem by ignoring these. */ | |
53832f31 | 21711 | if (attr && DW_STRING (attr) |
61012eef GB |
21712 | && (startswith (DW_STRING (attr), "._") |
21713 | || startswith (DW_STRING (attr), "<anonymous"))) | |
907af001 | 21714 | return NULL; |
53832f31 TT |
21715 | |
21716 | /* GCC might emit a nameless typedef that has a linkage name. See | |
21717 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
21718 | if (!attr || DW_STRING (attr) == NULL) | |
21719 | { | |
73b9be8b | 21720 | attr = dw2_linkage_name_attr (die, cu); |
53832f31 TT |
21721 | if (attr == NULL || DW_STRING (attr) == NULL) |
21722 | return NULL; | |
21723 | ||
df5c6c50 JK |
21724 | /* Avoid demangling DW_STRING (attr) the second time on a second |
21725 | call for the same DIE. */ | |
21726 | if (!DW_STRING_IS_CANONICAL (attr)) | |
53832f31 | 21727 | { |
43816ebc TT |
21728 | gdb::unique_xmalloc_ptr<char> demangled |
21729 | (gdb_demangle (DW_STRING (attr), DMGL_TYPES)); | |
4f180d53 AT |
21730 | if (demangled == nullptr) |
21731 | return nullptr; | |
43816ebc | 21732 | |
be1e3d3e | 21733 | DW_STRING (attr) = objfile->intern (demangled.get ()); |
53832f31 | 21734 | DW_STRING_IS_CANONICAL (attr) = 1; |
53832f31 | 21735 | } |
67430cd0 TT |
21736 | |
21737 | /* Strip any leading namespaces/classes, keep only the base name. | |
21738 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
21739 | const char *base = strrchr (DW_STRING (attr), ':'); | |
21740 | if (base && base > DW_STRING (attr) && base[-1] == ':') | |
21741 | return &base[1]; | |
21742 | else | |
21743 | return DW_STRING (attr); | |
53832f31 | 21744 | } |
907af001 UW |
21745 | break; |
21746 | ||
71c25dea | 21747 | default: |
907af001 UW |
21748 | break; |
21749 | } | |
21750 | ||
21751 | if (!DW_STRING_IS_CANONICAL (attr)) | |
21752 | { | |
be1e3d3e TT |
21753 | DW_STRING (attr) = dwarf2_canonicalize_name (DW_STRING (attr), cu, |
21754 | objfile); | |
907af001 | 21755 | DW_STRING_IS_CANONICAL (attr) = 1; |
71c25dea | 21756 | } |
907af001 | 21757 | return DW_STRING (attr); |
9219021c DC |
21758 | } |
21759 | ||
21760 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
21761 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
21762 | containing the return value on output. */ | |
9219021c DC |
21763 | |
21764 | static struct die_info * | |
f2f0e013 | 21765 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
21766 | { |
21767 | struct attribute *attr; | |
9219021c | 21768 | |
f2f0e013 | 21769 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
21770 | if (attr == NULL) |
21771 | return NULL; | |
21772 | ||
f2f0e013 | 21773 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
21774 | } |
21775 | ||
fa9c3fa0 TT |
21776 | /* A convenience function that returns an "unknown" DWARF name, |
21777 | including the value of V. STR is the name of the entity being | |
21778 | printed, e.g., "TAG". */ | |
21779 | ||
21780 | static const char * | |
21781 | dwarf_unknown (const char *str, unsigned v) | |
21782 | { | |
21783 | char *cell = get_print_cell (); | |
21784 | xsnprintf (cell, PRINT_CELL_SIZE, "DW_%s_<unknown: %u>", str, v); | |
21785 | return cell; | |
21786 | } | |
21787 | ||
c906108c SS |
21788 | /* Convert a DIE tag into its string name. */ |
21789 | ||
f39c6ffd | 21790 | static const char * |
aa1ee363 | 21791 | dwarf_tag_name (unsigned tag) |
c906108c | 21792 | { |
f39c6ffd TT |
21793 | const char *name = get_DW_TAG_name (tag); |
21794 | ||
21795 | if (name == NULL) | |
fa9c3fa0 | 21796 | return dwarf_unknown ("TAG", tag); |
f39c6ffd TT |
21797 | |
21798 | return name; | |
c906108c SS |
21799 | } |
21800 | ||
21801 | /* Convert a DWARF attribute code into its string name. */ | |
21802 | ||
f39c6ffd | 21803 | static const char * |
aa1ee363 | 21804 | dwarf_attr_name (unsigned attr) |
c906108c | 21805 | { |
f39c6ffd TT |
21806 | const char *name; |
21807 | ||
c764a876 | 21808 | #ifdef MIPS /* collides with DW_AT_HP_block_index */ |
f39c6ffd TT |
21809 | if (attr == DW_AT_MIPS_fde) |
21810 | return "DW_AT_MIPS_fde"; | |
21811 | #else | |
21812 | if (attr == DW_AT_HP_block_index) | |
21813 | return "DW_AT_HP_block_index"; | |
c764a876 | 21814 | #endif |
f39c6ffd TT |
21815 | |
21816 | name = get_DW_AT_name (attr); | |
21817 | ||
21818 | if (name == NULL) | |
fa9c3fa0 | 21819 | return dwarf_unknown ("AT", attr); |
f39c6ffd TT |
21820 | |
21821 | return name; | |
c906108c SS |
21822 | } |
21823 | ||
21824 | /* Convert a DWARF value form code into its string name. */ | |
21825 | ||
f39c6ffd | 21826 | static const char * |
aa1ee363 | 21827 | dwarf_form_name (unsigned form) |
c906108c | 21828 | { |
f39c6ffd TT |
21829 | const char *name = get_DW_FORM_name (form); |
21830 | ||
21831 | if (name == NULL) | |
fa9c3fa0 | 21832 | return dwarf_unknown ("FORM", form); |
f39c6ffd TT |
21833 | |
21834 | return name; | |
c906108c SS |
21835 | } |
21836 | ||
a121b7c1 | 21837 | static const char * |
fba45db2 | 21838 | dwarf_bool_name (unsigned mybool) |
c906108c SS |
21839 | { |
21840 | if (mybool) | |
21841 | return "TRUE"; | |
21842 | else | |
21843 | return "FALSE"; | |
21844 | } | |
21845 | ||
21846 | /* Convert a DWARF type code into its string name. */ | |
21847 | ||
f39c6ffd | 21848 | static const char * |
aa1ee363 | 21849 | dwarf_type_encoding_name (unsigned enc) |
c906108c | 21850 | { |
f39c6ffd | 21851 | const char *name = get_DW_ATE_name (enc); |
c906108c | 21852 | |
f39c6ffd | 21853 | if (name == NULL) |
fa9c3fa0 | 21854 | return dwarf_unknown ("ATE", enc); |
c906108c | 21855 | |
f39c6ffd | 21856 | return name; |
c906108c | 21857 | } |
c906108c | 21858 | |
f9aca02d | 21859 | static void |
d97bc12b | 21860 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
21861 | { |
21862 | unsigned int i; | |
21863 | ||
d97bc12b | 21864 | print_spaces (indent, f); |
9d8780f0 | 21865 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 21866 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 21867 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
21868 | |
21869 | if (die->parent != NULL) | |
21870 | { | |
21871 | print_spaces (indent, f); | |
9d8780f0 SM |
21872 | fprintf_unfiltered (f, " parent at offset: %s\n", |
21873 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
21874 | } |
21875 | ||
21876 | print_spaces (indent, f); | |
21877 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 21878 | dwarf_bool_name (die->child != NULL)); |
c906108c | 21879 | |
d97bc12b DE |
21880 | print_spaces (indent, f); |
21881 | fprintf_unfiltered (f, " attributes:\n"); | |
21882 | ||
c906108c SS |
21883 | for (i = 0; i < die->num_attrs; ++i) |
21884 | { | |
d97bc12b DE |
21885 | print_spaces (indent, f); |
21886 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
21887 | dwarf_attr_name (die->attrs[i].name), |
21888 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 21889 | |
c906108c SS |
21890 | switch (die->attrs[i].form) |
21891 | { | |
c906108c | 21892 | case DW_FORM_addr: |
336d760d | 21893 | case DW_FORM_addrx: |
3019eac3 | 21894 | case DW_FORM_GNU_addr_index: |
d97bc12b | 21895 | fprintf_unfiltered (f, "address: "); |
5af949e3 | 21896 | fputs_filtered (hex_string (DW_ADDR (&die->attrs[i])), f); |
c906108c SS |
21897 | break; |
21898 | case DW_FORM_block2: | |
21899 | case DW_FORM_block4: | |
21900 | case DW_FORM_block: | |
21901 | case DW_FORM_block1: | |
56eb65bd SP |
21902 | fprintf_unfiltered (f, "block: size %s", |
21903 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
c906108c | 21904 | break; |
2dc7f7b3 | 21905 | case DW_FORM_exprloc: |
56eb65bd SP |
21906 | fprintf_unfiltered (f, "expression: size %s", |
21907 | pulongest (DW_BLOCK (&die->attrs[i])->size)); | |
2dc7f7b3 | 21908 | break; |
0224619f JK |
21909 | case DW_FORM_data16: |
21910 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
21911 | break; | |
4568ecf9 DE |
21912 | case DW_FORM_ref_addr: |
21913 | fprintf_unfiltered (f, "ref address: "); | |
21914 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21915 | break; | |
36586728 TT |
21916 | case DW_FORM_GNU_ref_alt: |
21917 | fprintf_unfiltered (f, "alt ref address: "); | |
21918 | fputs_filtered (hex_string (DW_UNSND (&die->attrs[i])), f); | |
21919 | break; | |
10b3939b DJ |
21920 | case DW_FORM_ref1: |
21921 | case DW_FORM_ref2: | |
21922 | case DW_FORM_ref4: | |
4568ecf9 DE |
21923 | case DW_FORM_ref8: |
21924 | case DW_FORM_ref_udata: | |
d97bc12b | 21925 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
4568ecf9 | 21926 | (long) (DW_UNSND (&die->attrs[i]))); |
10b3939b | 21927 | break; |
c906108c SS |
21928 | case DW_FORM_data1: |
21929 | case DW_FORM_data2: | |
21930 | case DW_FORM_data4: | |
ce5d95e1 | 21931 | case DW_FORM_data8: |
c906108c SS |
21932 | case DW_FORM_udata: |
21933 | case DW_FORM_sdata: | |
43bbcdc2 PH |
21934 | fprintf_unfiltered (f, "constant: %s", |
21935 | pulongest (DW_UNSND (&die->attrs[i]))); | |
c906108c | 21936 | break; |
2dc7f7b3 TT |
21937 | case DW_FORM_sec_offset: |
21938 | fprintf_unfiltered (f, "section offset: %s", | |
21939 | pulongest (DW_UNSND (&die->attrs[i]))); | |
21940 | break; | |
55f1336d | 21941 | case DW_FORM_ref_sig8: |
ac9ec31b DE |
21942 | fprintf_unfiltered (f, "signature: %s", |
21943 | hex_string (DW_SIGNATURE (&die->attrs[i]))); | |
348e048f | 21944 | break; |
c906108c | 21945 | case DW_FORM_string: |
4bdf3d34 | 21946 | case DW_FORM_strp: |
43988095 | 21947 | case DW_FORM_line_strp: |
cf532bd1 | 21948 | case DW_FORM_strx: |
3019eac3 | 21949 | case DW_FORM_GNU_str_index: |
36586728 | 21950 | case DW_FORM_GNU_strp_alt: |
8285870a | 21951 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c906108c | 21952 | DW_STRING (&die->attrs[i]) |
8285870a JK |
21953 | ? DW_STRING (&die->attrs[i]) : "", |
21954 | DW_STRING_IS_CANONICAL (&die->attrs[i]) ? "is" : "not"); | |
c906108c SS |
21955 | break; |
21956 | case DW_FORM_flag: | |
21957 | if (DW_UNSND (&die->attrs[i])) | |
d97bc12b | 21958 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 21959 | else |
d97bc12b | 21960 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 21961 | break; |
2dc7f7b3 TT |
21962 | case DW_FORM_flag_present: |
21963 | fprintf_unfiltered (f, "flag: TRUE"); | |
21964 | break; | |
a8329558 | 21965 | case DW_FORM_indirect: |
0963b4bd MS |
21966 | /* The reader will have reduced the indirect form to |
21967 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 21968 | fprintf_unfiltered (f, |
3e43a32a | 21969 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 21970 | break; |
663c44ac JK |
21971 | case DW_FORM_implicit_const: |
21972 | fprintf_unfiltered (f, "constant: %s", | |
21973 | plongest (DW_SND (&die->attrs[i]))); | |
21974 | break; | |
c906108c | 21975 | default: |
d97bc12b | 21976 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 21977 | die->attrs[i].form); |
d97bc12b | 21978 | break; |
c906108c | 21979 | } |
d97bc12b | 21980 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
21981 | } |
21982 | } | |
21983 | ||
f9aca02d | 21984 | static void |
d97bc12b | 21985 | dump_die_for_error (struct die_info *die) |
c906108c | 21986 | { |
d97bc12b DE |
21987 | dump_die_shallow (gdb_stderr, 0, die); |
21988 | } | |
21989 | ||
21990 | static void | |
21991 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
21992 | { | |
21993 | int indent = level * 4; | |
21994 | ||
21995 | gdb_assert (die != NULL); | |
21996 | ||
21997 | if (level >= max_level) | |
21998 | return; | |
21999 | ||
22000 | dump_die_shallow (f, indent, die); | |
22001 | ||
22002 | if (die->child != NULL) | |
c906108c | 22003 | { |
d97bc12b DE |
22004 | print_spaces (indent, f); |
22005 | fprintf_unfiltered (f, " Children:"); | |
22006 | if (level + 1 < max_level) | |
22007 | { | |
22008 | fprintf_unfiltered (f, "\n"); | |
22009 | dump_die_1 (f, level + 1, max_level, die->child); | |
22010 | } | |
22011 | else | |
22012 | { | |
3e43a32a MS |
22013 | fprintf_unfiltered (f, |
22014 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22015 | } |
22016 | } | |
22017 | ||
22018 | if (die->sibling != NULL && level > 0) | |
22019 | { | |
22020 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
22021 | } |
22022 | } | |
22023 | ||
d97bc12b DE |
22024 | /* This is called from the pdie macro in gdbinit.in. |
22025 | It's not static so gcc will keep a copy callable from gdb. */ | |
22026 | ||
22027 | void | |
22028 | dump_die (struct die_info *die, int max_level) | |
22029 | { | |
22030 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
22031 | } | |
22032 | ||
f9aca02d | 22033 | static void |
51545339 | 22034 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22035 | { |
51545339 | 22036 | void **slot; |
c906108c | 22037 | |
9c541725 PA |
22038 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
22039 | to_underlying (die->sect_off), | |
b64f50a1 | 22040 | INSERT); |
51545339 DJ |
22041 | |
22042 | *slot = die; | |
c906108c SS |
22043 | } |
22044 | ||
b64f50a1 JK |
22045 | /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the |
22046 | required kind. */ | |
22047 | ||
22048 | static sect_offset | |
ff39bb5e | 22049 | dwarf2_get_ref_die_offset (const struct attribute *attr) |
93311388 | 22050 | { |
cd6c91b4 | 22051 | if (attr->form_is_ref ()) |
9c541725 | 22052 | return (sect_offset) DW_UNSND (attr); |
93311388 | 22053 | |
b98664d3 | 22054 | complaint (_("unsupported die ref attribute form: '%s'"), |
93311388 | 22055 | dwarf_form_name (attr->form)); |
9c541725 | 22056 | return {}; |
c906108c SS |
22057 | } |
22058 | ||
43bbcdc2 PH |
22059 | /* Return the constant value held by ATTR. Return DEFAULT_VALUE if |
22060 | * the value held by the attribute is not constant. */ | |
a02abb62 | 22061 | |
43bbcdc2 | 22062 | static LONGEST |
ff39bb5e | 22063 | dwarf2_get_attr_constant_value (const struct attribute *attr, int default_value) |
a02abb62 | 22064 | { |
663c44ac | 22065 | if (attr->form == DW_FORM_sdata || attr->form == DW_FORM_implicit_const) |
a02abb62 JB |
22066 | return DW_SND (attr); |
22067 | else if (attr->form == DW_FORM_udata | |
22068 | || attr->form == DW_FORM_data1 | |
22069 | || attr->form == DW_FORM_data2 | |
22070 | || attr->form == DW_FORM_data4 | |
22071 | || attr->form == DW_FORM_data8) | |
22072 | return DW_UNSND (attr); | |
22073 | else | |
22074 | { | |
cd6c91b4 | 22075 | /* For DW_FORM_data16 see attribute::form_is_constant. */ |
b98664d3 | 22076 | complaint (_("Attribute value is not a constant (%s)"), |
a02abb62 JB |
22077 | dwarf_form_name (attr->form)); |
22078 | return default_value; | |
22079 | } | |
22080 | } | |
22081 | ||
348e048f DE |
22082 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
22083 | On entry *REF_CU is the CU of SRC_DIE. | |
22084 | On exit *REF_CU is the CU of the result. */ | |
22085 | ||
22086 | static struct die_info * | |
ff39bb5e | 22087 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
22088 | struct dwarf2_cu **ref_cu) |
22089 | { | |
22090 | struct die_info *die; | |
22091 | ||
cd6c91b4 | 22092 | if (attr->form_is_ref ()) |
348e048f | 22093 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 22094 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
22095 | die = follow_die_sig (src_die, attr, ref_cu); |
22096 | else | |
22097 | { | |
22098 | dump_die_for_error (src_die); | |
22099 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
518817b3 | 22100 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
348e048f DE |
22101 | } |
22102 | ||
22103 | return die; | |
03dd20cc DJ |
22104 | } |
22105 | ||
5c631832 | 22106 | /* Follow reference OFFSET. |
673bfd45 DE |
22107 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
22108 | On exit *REF_CU is the CU of the result. | |
22109 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 22110 | |
f9aca02d | 22111 | static struct die_info * |
9c541725 | 22112 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 22113 | struct dwarf2_cu **ref_cu) |
c906108c | 22114 | { |
10b3939b | 22115 | struct die_info temp_die; |
f2f0e013 | 22116 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
518817b3 SM |
22117 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22118 | = cu->per_cu->dwarf2_per_objfile; | |
10b3939b | 22119 | |
348e048f DE |
22120 | gdb_assert (cu->per_cu != NULL); |
22121 | ||
98bfdba5 PA |
22122 | target_cu = cu; |
22123 | ||
3019eac3 | 22124 | if (cu->per_cu->is_debug_types) |
348e048f DE |
22125 | { |
22126 | /* .debug_types CUs cannot reference anything outside their CU. | |
22127 | If they need to, they have to reference a signatured type via | |
55f1336d | 22128 | DW_FORM_ref_sig8. */ |
4057dfde | 22129 | if (!cu->header.offset_in_cu_p (sect_off)) |
5c631832 | 22130 | return NULL; |
348e048f | 22131 | } |
36586728 | 22132 | else if (offset_in_dwz != cu->per_cu->is_dwz |
4057dfde | 22133 | || !cu->header.offset_in_cu_p (sect_off)) |
10b3939b DJ |
22134 | { |
22135 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 22136 | |
9c541725 | 22137 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
ed2dc618 | 22138 | dwarf2_per_objfile); |
03dd20cc DJ |
22139 | |
22140 | /* If necessary, add it to the queue and load its DIEs. */ | |
95554aad | 22141 | if (maybe_queue_comp_unit (cu, per_cu, cu->language)) |
58f0c718 | 22142 | load_full_comp_unit (per_cu, false, cu->language); |
03dd20cc | 22143 | |
10b3939b DJ |
22144 | target_cu = per_cu->cu; |
22145 | } | |
98bfdba5 PA |
22146 | else if (cu->dies == NULL) |
22147 | { | |
22148 | /* We're loading full DIEs during partial symbol reading. */ | |
22149 | gdb_assert (dwarf2_per_objfile->reading_partial_symbols); | |
58f0c718 | 22150 | load_full_comp_unit (cu->per_cu, false, language_minimal); |
98bfdba5 | 22151 | } |
c906108c | 22152 | |
f2f0e013 | 22153 | *ref_cu = target_cu; |
9c541725 | 22154 | temp_die.sect_off = sect_off; |
c24bdb02 KS |
22155 | |
22156 | if (target_cu != cu) | |
22157 | target_cu->ancestor = cu; | |
22158 | ||
9a3c8263 | 22159 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
22160 | &temp_die, |
22161 | to_underlying (sect_off)); | |
5c631832 | 22162 | } |
10b3939b | 22163 | |
5c631832 JK |
22164 | /* Follow reference attribute ATTR of SRC_DIE. |
22165 | On entry *REF_CU is the CU of SRC_DIE. | |
22166 | On exit *REF_CU is the CU of the result. */ | |
22167 | ||
22168 | static struct die_info * | |
ff39bb5e | 22169 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
22170 | struct dwarf2_cu **ref_cu) |
22171 | { | |
9c541725 | 22172 | sect_offset sect_off = dwarf2_get_ref_die_offset (attr); |
5c631832 JK |
22173 | struct dwarf2_cu *cu = *ref_cu; |
22174 | struct die_info *die; | |
22175 | ||
9c541725 | 22176 | die = follow_die_offset (sect_off, |
36586728 TT |
22177 | (attr->form == DW_FORM_GNU_ref_alt |
22178 | || cu->per_cu->is_dwz), | |
22179 | ref_cu); | |
5c631832 | 22180 | if (!die) |
9d8780f0 SM |
22181 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
22182 | "at %s [in module %s]"), | |
22183 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
518817b3 | 22184 | objfile_name (cu->per_cu->dwarf2_per_objfile->objfile)); |
348e048f | 22185 | |
5c631832 JK |
22186 | return die; |
22187 | } | |
22188 | ||
d4c9a4f8 | 22189 | /* See read.h. */ |
5c631832 JK |
22190 | |
22191 | struct dwarf2_locexpr_baton | |
9c541725 | 22192 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22193 | dwarf2_per_cu_data *per_cu, |
8b9737bf | 22194 | CORE_ADDR (*get_frame_pc) (void *baton), |
e4a62c65 | 22195 | void *baton, bool resolve_abstract_p) |
5c631832 | 22196 | { |
918dd910 | 22197 | struct dwarf2_cu *cu; |
5c631832 JK |
22198 | struct die_info *die; |
22199 | struct attribute *attr; | |
22200 | struct dwarf2_locexpr_baton retval; | |
12359b5e SM |
22201 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
22202 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
8cf6f0b1 | 22203 | |
918dd910 | 22204 | if (per_cu->cu == NULL) |
58f0c718 | 22205 | load_cu (per_cu, false); |
918dd910 | 22206 | cu = per_cu->cu; |
cc12ce38 DE |
22207 | if (cu == NULL) |
22208 | { | |
22209 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22210 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22211 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22212 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22213 | } |
918dd910 | 22214 | |
9c541725 | 22215 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 22216 | if (!die) |
9d8780f0 SM |
22217 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22218 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
22219 | |
22220 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 22221 | if (!attr && resolve_abstract_p |
3360b6e7 | 22222 | && (dwarf2_per_objfile->abstract_to_concrete.find (die->sect_off) |
e4a62c65 TV |
22223 | != dwarf2_per_objfile->abstract_to_concrete.end ())) |
22224 | { | |
22225 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
b3b3bada | 22226 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
eba4caf2 | 22227 | struct gdbarch *gdbarch = get_objfile_arch (objfile); |
e4a62c65 | 22228 | |
3360b6e7 TV |
22229 | for (const auto &cand_off |
22230 | : dwarf2_per_objfile->abstract_to_concrete[die->sect_off]) | |
e4a62c65 | 22231 | { |
3360b6e7 TV |
22232 | struct dwarf2_cu *cand_cu = cu; |
22233 | struct die_info *cand | |
22234 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
22235 | if (!cand | |
22236 | || !cand->parent | |
e4a62c65 TV |
22237 | || cand->parent->tag != DW_TAG_subprogram) |
22238 | continue; | |
22239 | ||
22240 | CORE_ADDR pc_low, pc_high; | |
22241 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
22242 | if (pc_low == ((CORE_ADDR) -1)) |
22243 | continue; | |
22244 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
22245 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
22246 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
22247 | continue; |
22248 | ||
22249 | die = cand; | |
22250 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
22251 | break; | |
22252 | } | |
22253 | } | |
22254 | ||
5c631832 JK |
22255 | if (!attr) |
22256 | { | |
e103e986 JK |
22257 | /* DWARF: "If there is no such attribute, then there is no effect.". |
22258 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 22259 | |
e103e986 | 22260 | retval.data = NULL; |
5c631832 JK |
22261 | retval.size = 0; |
22262 | } | |
cd6c91b4 | 22263 | else if (attr->form_is_section_offset ()) |
8cf6f0b1 TT |
22264 | { |
22265 | struct dwarf2_loclist_baton loclist_baton; | |
22266 | CORE_ADDR pc = (*get_frame_pc) (baton); | |
22267 | size_t size; | |
22268 | ||
22269 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
22270 | ||
22271 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
22272 | &size, pc); | |
22273 | retval.size = size; | |
22274 | } | |
5c631832 JK |
22275 | else |
22276 | { | |
4fc6c0d5 | 22277 | if (!attr->form_is_block ()) |
9d8780f0 | 22278 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 22279 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 22280 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 JK |
22281 | |
22282 | retval.data = DW_BLOCK (attr)->data; | |
22283 | retval.size = DW_BLOCK (attr)->size; | |
22284 | } | |
22285 | retval.per_cu = cu->per_cu; | |
918dd910 | 22286 | |
ed2dc618 | 22287 | age_cached_comp_units (dwarf2_per_objfile); |
918dd910 | 22288 | |
5c631832 | 22289 | return retval; |
348e048f DE |
22290 | } |
22291 | ||
d4c9a4f8 | 22292 | /* See read.h. */ |
8b9737bf TT |
22293 | |
22294 | struct dwarf2_locexpr_baton | |
22295 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
d4c9a4f8 | 22296 | dwarf2_per_cu_data *per_cu, |
8b9737bf TT |
22297 | CORE_ADDR (*get_frame_pc) (void *baton), |
22298 | void *baton) | |
22299 | { | |
9c541725 | 22300 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 22301 | |
9c541725 | 22302 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, get_frame_pc, baton); |
8b9737bf TT |
22303 | } |
22304 | ||
b6807d98 TT |
22305 | /* Write a constant of a given type as target-ordered bytes into |
22306 | OBSTACK. */ | |
22307 | ||
22308 | static const gdb_byte * | |
22309 | write_constant_as_bytes (struct obstack *obstack, | |
22310 | enum bfd_endian byte_order, | |
22311 | struct type *type, | |
22312 | ULONGEST value, | |
22313 | LONGEST *len) | |
22314 | { | |
22315 | gdb_byte *result; | |
22316 | ||
22317 | *len = TYPE_LENGTH (type); | |
224c3ddb | 22318 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22319 | store_unsigned_integer (result, *len, byte_order, value); |
22320 | ||
22321 | return result; | |
22322 | } | |
22323 | ||
d4c9a4f8 | 22324 | /* See read.h. */ |
b6807d98 TT |
22325 | |
22326 | const gdb_byte * | |
9c541725 | 22327 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
d4c9a4f8 SM |
22328 | dwarf2_per_cu_data *per_cu, |
22329 | obstack *obstack, | |
b6807d98 TT |
22330 | LONGEST *len) |
22331 | { | |
22332 | struct dwarf2_cu *cu; | |
22333 | struct die_info *die; | |
22334 | struct attribute *attr; | |
22335 | const gdb_byte *result = NULL; | |
22336 | struct type *type; | |
22337 | LONGEST value; | |
22338 | enum bfd_endian byte_order; | |
e3b94546 | 22339 | struct objfile *objfile = per_cu->dwarf2_per_objfile->objfile; |
b6807d98 | 22340 | |
b6807d98 | 22341 | if (per_cu->cu == NULL) |
58f0c718 | 22342 | load_cu (per_cu, false); |
b6807d98 | 22343 | cu = per_cu->cu; |
cc12ce38 DE |
22344 | if (cu == NULL) |
22345 | { | |
22346 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
22347 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
22348 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
22349 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 22350 | } |
b6807d98 | 22351 | |
9c541725 | 22352 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 22353 | if (!die) |
9d8780f0 SM |
22354 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
22355 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
22356 | |
22357 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
22358 | if (attr == NULL) | |
22359 | return NULL; | |
22360 | ||
e3b94546 | 22361 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
22362 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
22363 | ||
22364 | switch (attr->form) | |
22365 | { | |
22366 | case DW_FORM_addr: | |
336d760d | 22367 | case DW_FORM_addrx: |
b6807d98 TT |
22368 | case DW_FORM_GNU_addr_index: |
22369 | { | |
22370 | gdb_byte *tem; | |
22371 | ||
22372 | *len = cu->header.addr_size; | |
224c3ddb | 22373 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
22374 | store_unsigned_integer (tem, *len, byte_order, DW_ADDR (attr)); |
22375 | result = tem; | |
22376 | } | |
22377 | break; | |
22378 | case DW_FORM_string: | |
22379 | case DW_FORM_strp: | |
cf532bd1 | 22380 | case DW_FORM_strx: |
b6807d98 TT |
22381 | case DW_FORM_GNU_str_index: |
22382 | case DW_FORM_GNU_strp_alt: | |
22383 | /* DW_STRING is already allocated on the objfile obstack, point | |
22384 | directly to it. */ | |
22385 | result = (const gdb_byte *) DW_STRING (attr); | |
22386 | *len = strlen (DW_STRING (attr)); | |
22387 | break; | |
22388 | case DW_FORM_block1: | |
22389 | case DW_FORM_block2: | |
22390 | case DW_FORM_block4: | |
22391 | case DW_FORM_block: | |
22392 | case DW_FORM_exprloc: | |
0224619f | 22393 | case DW_FORM_data16: |
b6807d98 TT |
22394 | result = DW_BLOCK (attr)->data; |
22395 | *len = DW_BLOCK (attr)->size; | |
22396 | break; | |
22397 | ||
22398 | /* The DW_AT_const_value attributes are supposed to carry the | |
22399 | symbol's value "represented as it would be on the target | |
22400 | architecture." By the time we get here, it's already been | |
22401 | converted to host endianness, so we just need to sign- or | |
22402 | zero-extend it as appropriate. */ | |
22403 | case DW_FORM_data1: | |
22404 | type = die_type (die, cu); | |
22405 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
22406 | if (result == NULL) | |
22407 | result = write_constant_as_bytes (obstack, byte_order, | |
22408 | type, value, len); | |
22409 | break; | |
22410 | case DW_FORM_data2: | |
22411 | type = die_type (die, cu); | |
22412 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
22413 | if (result == NULL) | |
22414 | result = write_constant_as_bytes (obstack, byte_order, | |
22415 | type, value, len); | |
22416 | break; | |
22417 | case DW_FORM_data4: | |
22418 | type = die_type (die, cu); | |
22419 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
22420 | if (result == NULL) | |
22421 | result = write_constant_as_bytes (obstack, byte_order, | |
22422 | type, value, len); | |
22423 | break; | |
22424 | case DW_FORM_data8: | |
22425 | type = die_type (die, cu); | |
22426 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
22427 | if (result == NULL) | |
22428 | result = write_constant_as_bytes (obstack, byte_order, | |
22429 | type, value, len); | |
22430 | break; | |
22431 | ||
22432 | case DW_FORM_sdata: | |
663c44ac | 22433 | case DW_FORM_implicit_const: |
b6807d98 TT |
22434 | type = die_type (die, cu); |
22435 | result = write_constant_as_bytes (obstack, byte_order, | |
22436 | type, DW_SND (attr), len); | |
22437 | break; | |
22438 | ||
22439 | case DW_FORM_udata: | |
22440 | type = die_type (die, cu); | |
22441 | result = write_constant_as_bytes (obstack, byte_order, | |
22442 | type, DW_UNSND (attr), len); | |
22443 | break; | |
22444 | ||
22445 | default: | |
b98664d3 | 22446 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
22447 | dwarf_form_name (attr->form)); |
22448 | break; | |
22449 | } | |
22450 | ||
22451 | return result; | |
22452 | } | |
22453 | ||
d4c9a4f8 | 22454 | /* See read.h. */ |
7942e96e AA |
22455 | |
22456 | struct type * | |
9c541725 | 22457 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
d4c9a4f8 | 22458 | dwarf2_per_cu_data *per_cu) |
7942e96e AA |
22459 | { |
22460 | struct dwarf2_cu *cu; | |
22461 | struct die_info *die; | |
22462 | ||
7942e96e | 22463 | if (per_cu->cu == NULL) |
58f0c718 | 22464 | load_cu (per_cu, false); |
7942e96e AA |
22465 | cu = per_cu->cu; |
22466 | if (!cu) | |
22467 | return NULL; | |
22468 | ||
9c541725 | 22469 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
22470 | if (!die) |
22471 | return NULL; | |
22472 | ||
22473 | return die_type (die, cu); | |
22474 | } | |
22475 | ||
8cb5117c | 22476 | /* See read.h. */ |
8a9b8146 TT |
22477 | |
22478 | struct type * | |
b64f50a1 | 22479 | dwarf2_get_die_type (cu_offset die_offset, |
8a9b8146 TT |
22480 | struct dwarf2_per_cu_data *per_cu) |
22481 | { | |
9c541725 | 22482 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
b64f50a1 | 22483 | return get_die_type_at_offset (die_offset_sect, per_cu); |
8a9b8146 TT |
22484 | } |
22485 | ||
ac9ec31b | 22486 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 22487 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
22488 | On exit *REF_CU is the CU of the result. |
22489 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
22490 | |
22491 | static struct die_info * | |
ac9ec31b DE |
22492 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
22493 | struct dwarf2_cu **ref_cu) | |
348e048f | 22494 | { |
348e048f | 22495 | struct die_info temp_die; |
c24bdb02 | 22496 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f DE |
22497 | struct die_info *die; |
22498 | ||
ac9ec31b DE |
22499 | /* While it might be nice to assert sig_type->type == NULL here, |
22500 | we can get here for DW_AT_imported_declaration where we need | |
22501 | the DIE not the type. */ | |
348e048f DE |
22502 | |
22503 | /* If necessary, add it to the queue and load its DIEs. */ | |
22504 | ||
95554aad | 22505 | if (maybe_queue_comp_unit (*ref_cu, &sig_type->per_cu, language_minimal)) |
a0f42c21 | 22506 | read_signatured_type (sig_type); |
348e048f | 22507 | |
348e048f | 22508 | sig_cu = sig_type->per_cu.cu; |
69d751e3 | 22509 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
22510 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
22511 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 22512 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 22513 | to_underlying (temp_die.sect_off)); |
348e048f DE |
22514 | if (die) |
22515 | { | |
ed2dc618 | 22516 | struct dwarf2_per_objfile *dwarf2_per_objfile |
518817b3 | 22517 | = (*ref_cu)->per_cu->dwarf2_per_objfile; |
ed2dc618 | 22518 | |
796a7ff8 DE |
22519 | /* For .gdb_index version 7 keep track of included TUs. |
22520 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
22521 | if (dwarf2_per_objfile->index_table != NULL | |
22522 | && dwarf2_per_objfile->index_table->version <= 7) | |
22523 | { | |
ae640021 | 22524 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
22525 | } |
22526 | ||
348e048f | 22527 | *ref_cu = sig_cu; |
c24bdb02 KS |
22528 | if (sig_cu != cu) |
22529 | sig_cu->ancestor = cu; | |
22530 | ||
348e048f DE |
22531 | return die; |
22532 | } | |
22533 | ||
ac9ec31b DE |
22534 | return NULL; |
22535 | } | |
22536 | ||
22537 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
22538 | On entry *REF_CU is the CU of SRC_DIE. | |
22539 | On exit *REF_CU is the CU of the result. | |
22540 | The result is the DIE of the type. | |
22541 | If the referenced type cannot be found an error is thrown. */ | |
22542 | ||
22543 | static struct die_info * | |
ff39bb5e | 22544 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
22545 | struct dwarf2_cu **ref_cu) |
22546 | { | |
22547 | ULONGEST signature = DW_SIGNATURE (attr); | |
22548 | struct signatured_type *sig_type; | |
22549 | struct die_info *die; | |
22550 | ||
22551 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
22552 | ||
a2ce51a0 | 22553 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
22554 | /* sig_type will be NULL if the signatured type is missing from |
22555 | the debug info. */ | |
22556 | if (sig_type == NULL) | |
22557 | { | |
22558 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
9d8780f0 SM |
22559 | " from DIE at %s [in module %s]"), |
22560 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22561 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22562 | } |
22563 | ||
22564 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
22565 | if (die == NULL) | |
22566 | { | |
22567 | dump_die_for_error (src_die); | |
22568 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
22569 | " from DIE at %s [in module %s]"), |
22570 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
518817b3 | 22571 | objfile_name ((*ref_cu)->per_cu->dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22572 | } |
22573 | ||
22574 | return die; | |
22575 | } | |
22576 | ||
22577 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
22578 | reading in and processing the type unit if necessary. */ | |
22579 | ||
22580 | static struct type * | |
22581 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
22582 | struct dwarf2_cu *cu) | |
22583 | { | |
518817b3 SM |
22584 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22585 | = cu->per_cu->dwarf2_per_objfile; | |
ac9ec31b DE |
22586 | struct signatured_type *sig_type; |
22587 | struct dwarf2_cu *type_cu; | |
22588 | struct die_info *type_die; | |
22589 | struct type *type; | |
22590 | ||
a2ce51a0 | 22591 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
22592 | /* sig_type will be NULL if the signatured type is missing from |
22593 | the debug info. */ | |
22594 | if (sig_type == NULL) | |
22595 | { | |
b98664d3 | 22596 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
22597 | " from DIE at %s [in module %s]"), |
22598 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22599 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22600 | return build_error_marker_type (cu, die); |
22601 | } | |
22602 | ||
22603 | /* If we already know the type we're done. */ | |
22604 | if (sig_type->type != NULL) | |
22605 | return sig_type->type; | |
22606 | ||
22607 | type_cu = cu; | |
22608 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
22609 | if (type_die != NULL) | |
22610 | { | |
22611 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
22612 | is created. This is important, for example, because for c++ classes | |
22613 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
22614 | type = read_type_die (type_die, type_cu); | |
22615 | if (type == NULL) | |
22616 | { | |
b98664d3 | 22617 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
22618 | " referenced from DIE at %s [in module %s]"), |
22619 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22620 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22621 | type = build_error_marker_type (cu, die); |
22622 | } | |
22623 | } | |
22624 | else | |
22625 | { | |
b98664d3 | 22626 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
22627 | " from DIE at %s [in module %s]"), |
22628 | hex_string (signature), sect_offset_str (die->sect_off), | |
4262abfb | 22629 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22630 | type = build_error_marker_type (cu, die); |
22631 | } | |
22632 | sig_type->type = type; | |
22633 | ||
22634 | return type; | |
22635 | } | |
22636 | ||
22637 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
22638 | reading in and processing the type unit if necessary. */ | |
22639 | ||
22640 | static struct type * | |
ff39bb5e | 22641 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 22642 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
22643 | { |
22644 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
cd6c91b4 | 22645 | if (attr->form_is_ref ()) |
ac9ec31b DE |
22646 | { |
22647 | struct dwarf2_cu *type_cu = cu; | |
22648 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
22649 | ||
22650 | return read_type_die (type_die, type_cu); | |
22651 | } | |
22652 | else if (attr->form == DW_FORM_ref_sig8) | |
22653 | { | |
22654 | return get_signatured_type (die, DW_SIGNATURE (attr), cu); | |
22655 | } | |
22656 | else | |
22657 | { | |
518817b3 SM |
22658 | struct dwarf2_per_objfile *dwarf2_per_objfile |
22659 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 22660 | |
b98664d3 | 22661 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
22662 | " at %s [in module %s]"), |
22663 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
4262abfb | 22664 | objfile_name (dwarf2_per_objfile->objfile)); |
ac9ec31b DE |
22665 | return build_error_marker_type (cu, die); |
22666 | } | |
348e048f DE |
22667 | } |
22668 | ||
e5fe5e75 | 22669 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
22670 | |
22671 | static void | |
e5fe5e75 | 22672 | load_full_type_unit (struct dwarf2_per_cu_data *per_cu) |
348e048f | 22673 | { |
52dc124a | 22674 | struct signatured_type *sig_type; |
348e048f | 22675 | |
f4dc4d17 | 22676 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
197400e8 | 22677 | gdb_assert (! per_cu->type_unit_group_p ()); |
f4dc4d17 | 22678 | |
6721b2ec DE |
22679 | /* We have the per_cu, but we need the signatured_type. |
22680 | Fortunately this is an easy translation. */ | |
22681 | gdb_assert (per_cu->is_debug_types); | |
22682 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 22683 | |
6721b2ec | 22684 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22685 | |
52dc124a | 22686 | read_signatured_type (sig_type); |
348e048f | 22687 | |
6721b2ec | 22688 | gdb_assert (per_cu->cu != NULL); |
348e048f DE |
22689 | } |
22690 | ||
3019eac3 DE |
22691 | /* Read in a signatured type and build its CU and DIEs. |
22692 | If the type is a stub for the real type in a DWO file, | |
22693 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
22694 | |
22695 | static void | |
22696 | read_signatured_type (struct signatured_type *sig_type) | |
22697 | { | |
22698 | struct dwarf2_per_cu_data *per_cu = &sig_type->per_cu; | |
348e048f | 22699 | |
3019eac3 | 22700 | gdb_assert (per_cu->is_debug_types); |
dee91e82 | 22701 | gdb_assert (per_cu->cu == NULL); |
348e048f | 22702 | |
6751ebae | 22703 | cutu_reader reader (per_cu, NULL, 0, false); |
c0ab21c2 TT |
22704 | |
22705 | if (!reader.dummy_p) | |
22706 | { | |
22707 | struct dwarf2_cu *cu = reader.cu; | |
22708 | const gdb_byte *info_ptr = reader.info_ptr; | |
22709 | ||
22710 | gdb_assert (cu->die_hash == NULL); | |
22711 | cu->die_hash = | |
22712 | htab_create_alloc_ex (cu->header.length / 12, | |
22713 | die_hash, | |
22714 | die_eq, | |
22715 | NULL, | |
22716 | &cu->comp_unit_obstack, | |
22717 | hashtab_obstack_allocate, | |
22718 | dummy_obstack_deallocate); | |
22719 | ||
3e225074 | 22720 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
22721 | reader.comp_unit_die->child |
22722 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, | |
22723 | reader.comp_unit_die); | |
22724 | cu->dies = reader.comp_unit_die; | |
22725 | /* comp_unit_die is not stored in die_hash, no need. */ | |
22726 | ||
22727 | /* We try not to read any attributes in this function, because | |
22728 | not all CUs needed for references have been loaded yet, and | |
22729 | symbol table processing isn't initialized. But we have to | |
22730 | set the CU language, or we won't be able to build types | |
22731 | correctly. Similarly, if we do not read the producer, we can | |
22732 | not apply producer-specific interpretation. */ | |
22733 | prepare_one_comp_unit (cu, cu->dies, language_minimal); | |
6751ebae TT |
22734 | |
22735 | reader.keep (); | |
c0ab21c2 TT |
22736 | } |
22737 | ||
7ee85ab1 | 22738 | sig_type->per_cu.tu_read = 1; |
c906108c SS |
22739 | } |
22740 | ||
c906108c SS |
22741 | /* Decode simple location descriptions. |
22742 | Given a pointer to a dwarf block that defines a location, compute | |
22743 | the location and return the value. | |
22744 | ||
4cecd739 DJ |
22745 | NOTE drow/2003-11-18: This function is called in two situations |
22746 | now: for the address of static or global variables (partial symbols | |
22747 | only) and for offsets into structures which are expected to be | |
22748 | (more or less) constant. The partial symbol case should go away, | |
22749 | and only the constant case should remain. That will let this | |
22750 | function complain more accurately. A few special modes are allowed | |
22751 | without complaint for global variables (for instance, global | |
22752 | register values and thread-local values). | |
c906108c SS |
22753 | |
22754 | A location description containing no operations indicates that the | |
4cecd739 | 22755 | object is optimized out. The return value is 0 for that case. |
6b992462 DJ |
22756 | FIXME drow/2003-11-16: No callers check for this case any more; soon all |
22757 | callers will only want a very basic result and this can become a | |
21ae7a4d JK |
22758 | complaint. |
22759 | ||
22760 | Note that stack[0] is unused except as a default error return. */ | |
c906108c SS |
22761 | |
22762 | static CORE_ADDR | |
e7c27a73 | 22763 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu) |
c906108c | 22764 | { |
518817b3 | 22765 | struct objfile *objfile = cu->per_cu->dwarf2_per_objfile->objfile; |
56eb65bd SP |
22766 | size_t i; |
22767 | size_t size = blk->size; | |
d521ce57 | 22768 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
22769 | CORE_ADDR stack[64]; |
22770 | int stacki; | |
22771 | unsigned int bytes_read, unsnd; | |
22772 | gdb_byte op; | |
c906108c | 22773 | |
21ae7a4d JK |
22774 | i = 0; |
22775 | stacki = 0; | |
22776 | stack[stacki] = 0; | |
22777 | stack[++stacki] = 0; | |
22778 | ||
22779 | while (i < size) | |
22780 | { | |
22781 | op = data[i++]; | |
22782 | switch (op) | |
22783 | { | |
22784 | case DW_OP_lit0: | |
22785 | case DW_OP_lit1: | |
22786 | case DW_OP_lit2: | |
22787 | case DW_OP_lit3: | |
22788 | case DW_OP_lit4: | |
22789 | case DW_OP_lit5: | |
22790 | case DW_OP_lit6: | |
22791 | case DW_OP_lit7: | |
22792 | case DW_OP_lit8: | |
22793 | case DW_OP_lit9: | |
22794 | case DW_OP_lit10: | |
22795 | case DW_OP_lit11: | |
22796 | case DW_OP_lit12: | |
22797 | case DW_OP_lit13: | |
22798 | case DW_OP_lit14: | |
22799 | case DW_OP_lit15: | |
22800 | case DW_OP_lit16: | |
22801 | case DW_OP_lit17: | |
22802 | case DW_OP_lit18: | |
22803 | case DW_OP_lit19: | |
22804 | case DW_OP_lit20: | |
22805 | case DW_OP_lit21: | |
22806 | case DW_OP_lit22: | |
22807 | case DW_OP_lit23: | |
22808 | case DW_OP_lit24: | |
22809 | case DW_OP_lit25: | |
22810 | case DW_OP_lit26: | |
22811 | case DW_OP_lit27: | |
22812 | case DW_OP_lit28: | |
22813 | case DW_OP_lit29: | |
22814 | case DW_OP_lit30: | |
22815 | case DW_OP_lit31: | |
22816 | stack[++stacki] = op - DW_OP_lit0; | |
22817 | break; | |
f1bea926 | 22818 | |
21ae7a4d JK |
22819 | case DW_OP_reg0: |
22820 | case DW_OP_reg1: | |
22821 | case DW_OP_reg2: | |
22822 | case DW_OP_reg3: | |
22823 | case DW_OP_reg4: | |
22824 | case DW_OP_reg5: | |
22825 | case DW_OP_reg6: | |
22826 | case DW_OP_reg7: | |
22827 | case DW_OP_reg8: | |
22828 | case DW_OP_reg9: | |
22829 | case DW_OP_reg10: | |
22830 | case DW_OP_reg11: | |
22831 | case DW_OP_reg12: | |
22832 | case DW_OP_reg13: | |
22833 | case DW_OP_reg14: | |
22834 | case DW_OP_reg15: | |
22835 | case DW_OP_reg16: | |
22836 | case DW_OP_reg17: | |
22837 | case DW_OP_reg18: | |
22838 | case DW_OP_reg19: | |
22839 | case DW_OP_reg20: | |
22840 | case DW_OP_reg21: | |
22841 | case DW_OP_reg22: | |
22842 | case DW_OP_reg23: | |
22843 | case DW_OP_reg24: | |
22844 | case DW_OP_reg25: | |
22845 | case DW_OP_reg26: | |
22846 | case DW_OP_reg27: | |
22847 | case DW_OP_reg28: | |
22848 | case DW_OP_reg29: | |
22849 | case DW_OP_reg30: | |
22850 | case DW_OP_reg31: | |
22851 | stack[++stacki] = op - DW_OP_reg0; | |
22852 | if (i < size) | |
22853 | dwarf2_complex_location_expr_complaint (); | |
22854 | break; | |
c906108c | 22855 | |
21ae7a4d JK |
22856 | case DW_OP_regx: |
22857 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
22858 | i += bytes_read; | |
22859 | stack[++stacki] = unsnd; | |
22860 | if (i < size) | |
22861 | dwarf2_complex_location_expr_complaint (); | |
22862 | break; | |
c906108c | 22863 | |
21ae7a4d | 22864 | case DW_OP_addr: |
c8a7a66f TT |
22865 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
22866 | &bytes_read); | |
21ae7a4d JK |
22867 | i += bytes_read; |
22868 | break; | |
d53d4ac5 | 22869 | |
21ae7a4d JK |
22870 | case DW_OP_const1u: |
22871 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
22872 | i += 1; | |
22873 | break; | |
22874 | ||
22875 | case DW_OP_const1s: | |
22876 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
22877 | i += 1; | |
22878 | break; | |
22879 | ||
22880 | case DW_OP_const2u: | |
22881 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
22882 | i += 2; | |
22883 | break; | |
22884 | ||
22885 | case DW_OP_const2s: | |
22886 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
22887 | i += 2; | |
22888 | break; | |
d53d4ac5 | 22889 | |
21ae7a4d JK |
22890 | case DW_OP_const4u: |
22891 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
22892 | i += 4; | |
22893 | break; | |
22894 | ||
22895 | case DW_OP_const4s: | |
22896 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
22897 | i += 4; | |
22898 | break; | |
22899 | ||
585861ea JK |
22900 | case DW_OP_const8u: |
22901 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
22902 | i += 8; | |
22903 | break; | |
22904 | ||
21ae7a4d JK |
22905 | case DW_OP_constu: |
22906 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
22907 | &bytes_read); | |
22908 | i += bytes_read; | |
22909 | break; | |
22910 | ||
22911 | case DW_OP_consts: | |
22912 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
22913 | i += bytes_read; | |
22914 | break; | |
22915 | ||
22916 | case DW_OP_dup: | |
22917 | stack[stacki + 1] = stack[stacki]; | |
22918 | stacki++; | |
22919 | break; | |
22920 | ||
22921 | case DW_OP_plus: | |
22922 | stack[stacki - 1] += stack[stacki]; | |
22923 | stacki--; | |
22924 | break; | |
22925 | ||
22926 | case DW_OP_plus_uconst: | |
22927 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
22928 | &bytes_read); | |
22929 | i += bytes_read; | |
22930 | break; | |
22931 | ||
22932 | case DW_OP_minus: | |
22933 | stack[stacki - 1] -= stack[stacki]; | |
22934 | stacki--; | |
22935 | break; | |
22936 | ||
22937 | case DW_OP_deref: | |
22938 | /* If we're not the last op, then we definitely can't encode | |
22939 | this using GDB's address_class enum. This is valid for partial | |
22940 | global symbols, although the variable's address will be bogus | |
22941 | in the psymtab. */ | |
22942 | if (i < size) | |
22943 | dwarf2_complex_location_expr_complaint (); | |
22944 | break; | |
22945 | ||
22946 | case DW_OP_GNU_push_tls_address: | |
4aa4e28b | 22947 | case DW_OP_form_tls_address: |
21ae7a4d JK |
22948 | /* The top of the stack has the offset from the beginning |
22949 | of the thread control block at which the variable is located. */ | |
22950 | /* Nothing should follow this operator, so the top of stack would | |
22951 | be returned. */ | |
22952 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
22953 | address will be bogus in the psymtab. Make it always at least |
22954 | non-zero to not look as a variable garbage collected by linker | |
22955 | which have DW_OP_addr 0. */ | |
21ae7a4d JK |
22956 | if (i < size) |
22957 | dwarf2_complex_location_expr_complaint (); | |
585861ea | 22958 | stack[stacki]++; |
21ae7a4d JK |
22959 | break; |
22960 | ||
22961 | case DW_OP_GNU_uninit: | |
22962 | break; | |
22963 | ||
336d760d | 22964 | case DW_OP_addrx: |
3019eac3 | 22965 | case DW_OP_GNU_addr_index: |
49f6c839 | 22966 | case DW_OP_GNU_const_index: |
3019eac3 DE |
22967 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
22968 | &bytes_read); | |
22969 | i += bytes_read; | |
22970 | break; | |
22971 | ||
21ae7a4d JK |
22972 | default: |
22973 | { | |
f39c6ffd | 22974 | const char *name = get_DW_OP_name (op); |
21ae7a4d JK |
22975 | |
22976 | if (name) | |
b98664d3 | 22977 | complaint (_("unsupported stack op: '%s'"), |
21ae7a4d JK |
22978 | name); |
22979 | else | |
b98664d3 | 22980 | complaint (_("unsupported stack op: '%02x'"), |
21ae7a4d JK |
22981 | op); |
22982 | } | |
22983 | ||
22984 | return (stack[stacki]); | |
d53d4ac5 | 22985 | } |
3c6e0cb3 | 22986 | |
21ae7a4d JK |
22987 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
22988 | outside of the allocated space. Also enforce minimum>0. */ | |
22989 | if (stacki >= ARRAY_SIZE (stack) - 1) | |
22990 | { | |
b98664d3 | 22991 | complaint (_("location description stack overflow")); |
21ae7a4d JK |
22992 | return 0; |
22993 | } | |
22994 | ||
22995 | if (stacki <= 0) | |
22996 | { | |
b98664d3 | 22997 | complaint (_("location description stack underflow")); |
21ae7a4d JK |
22998 | return 0; |
22999 | } | |
23000 | } | |
23001 | return (stack[stacki]); | |
c906108c SS |
23002 | } |
23003 | ||
23004 | /* memory allocation interface */ | |
23005 | ||
c906108c | 23006 | static struct dwarf_block * |
7b5a2f43 | 23007 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 23008 | { |
8d749320 | 23009 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
23010 | } |
23011 | ||
c906108c | 23012 | static struct die_info * |
b60c80d6 | 23013 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
23014 | { |
23015 | struct die_info *die; | |
b60c80d6 DJ |
23016 | size_t size = sizeof (struct die_info); |
23017 | ||
23018 | if (num_attrs > 1) | |
23019 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 23020 | |
b60c80d6 | 23021 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
23022 | memset (die, 0, sizeof (struct die_info)); |
23023 | return (die); | |
23024 | } | |
2e276125 JB |
23025 | |
23026 | \f | |
a036ba48 | 23027 | |
c90ec28a | 23028 | /* Macro support. */ |
cf2c3c16 | 23029 | |
9eac9650 TT |
23030 | /* An overload of dwarf_decode_macros that finds the correct section |
23031 | and ensures it is read in before calling the other overload. */ | |
23032 | ||
23033 | static void | |
23034 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, | |
23035 | int section_is_gnu) | |
23036 | { | |
23037 | struct dwarf2_per_objfile *dwarf2_per_objfile | |
23038 | = cu->per_cu->dwarf2_per_objfile; | |
23039 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
5a0e026f | 23040 | const struct line_header *lh = cu->line_header; |
9eac9650 TT |
23041 | unsigned int offset_size = cu->header.offset_size; |
23042 | struct dwarf2_section_info *section; | |
23043 | const char *section_name; | |
23044 | ||
23045 | if (cu->dwo_unit != nullptr) | |
23046 | { | |
23047 | if (section_is_gnu) | |
23048 | { | |
23049 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
23050 | section_name = ".debug_macro.dwo"; | |
23051 | } | |
23052 | else | |
23053 | { | |
23054 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
23055 | section_name = ".debug_macinfo.dwo"; | |
23056 | } | |
23057 | } | |
23058 | else | |
23059 | { | |
23060 | if (section_is_gnu) | |
23061 | { | |
23062 | section = &dwarf2_per_objfile->macro; | |
23063 | section_name = ".debug_macro"; | |
23064 | } | |
23065 | else | |
23066 | { | |
23067 | section = &dwarf2_per_objfile->macinfo; | |
23068 | section_name = ".debug_macinfo"; | |
23069 | } | |
23070 | } | |
23071 | ||
23072 | section->read (objfile); | |
23073 | if (section->buffer == nullptr) | |
23074 | { | |
23075 | complaint (_("missing %s section"), section_name); | |
23076 | return; | |
23077 | } | |
23078 | ||
23079 | buildsym_compunit *builder = cu->get_builder (); | |
23080 | ||
23081 | dwarf_decode_macros (dwarf2_per_objfile, builder, section, lh, | |
23082 | offset_size, offset, section_is_gnu); | |
23083 | } | |
23084 | ||
3019eac3 DE |
23085 | /* Return the .debug_loc section to use for CU. |
23086 | For DWO files use .debug_loc.dwo. */ | |
23087 | ||
23088 | static struct dwarf2_section_info * | |
23089 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
23090 | { | |
518817b3 SM |
23091 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23092 | = cu->per_cu->dwarf2_per_objfile; | |
ed2dc618 | 23093 | |
3019eac3 | 23094 | if (cu->dwo_unit) |
43988095 JK |
23095 | { |
23096 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 23097 | |
43988095 JK |
23098 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
23099 | } | |
23100 | return (cu->header.version >= 5 ? &dwarf2_per_objfile->loclists | |
23101 | : &dwarf2_per_objfile->loc); | |
3019eac3 DE |
23102 | } |
23103 | ||
8cf6f0b1 TT |
23104 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
23105 | ||
23106 | static void | |
23107 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
23108 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 23109 | const struct attribute *attr) |
8cf6f0b1 | 23110 | { |
518817b3 SM |
23111 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23112 | = cu->per_cu->dwarf2_per_objfile; | |
3019eac3 DE |
23113 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
23114 | ||
96b79293 | 23115 | section->read (dwarf2_per_objfile->objfile); |
8cf6f0b1 TT |
23116 | |
23117 | baton->per_cu = cu->per_cu; | |
23118 | gdb_assert (baton->per_cu); | |
23119 | /* We don't know how long the location list is, but make sure we | |
23120 | don't run off the edge of the section. */ | |
3019eac3 DE |
23121 | baton->size = section->size - DW_UNSND (attr); |
23122 | baton->data = section->buffer + DW_UNSND (attr); | |
8cf6f0b1 | 23123 | baton->base_address = cu->base_address; |
f664829e | 23124 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
23125 | } |
23126 | ||
4c2df51b | 23127 | static void |
ff39bb5e | 23128 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 23129 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 23130 | { |
518817b3 SM |
23131 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23132 | = cu->per_cu->dwarf2_per_objfile; | |
bb5ed363 | 23133 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3019eac3 | 23134 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 23135 | |
cd6c91b4 | 23136 | if (attr->form_is_section_offset () |
3019eac3 | 23137 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
23138 | the section. If so, fall through to the complaint in the |
23139 | other branch. */ | |
2c7d5afc | 23140 | && DW_UNSND (attr) < section->get_size (objfile)) |
4c2df51b | 23141 | { |
0d53c4c4 | 23142 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 23143 | |
8d749320 | 23144 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 23145 | |
8cf6f0b1 | 23146 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 23147 | |
d00adf39 | 23148 | if (cu->base_known == 0) |
b98664d3 | 23149 | complaint (_("Location list used without " |
3e43a32a | 23150 | "specifying the CU base address.")); |
4c2df51b | 23151 | |
f1e6e072 TT |
23152 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23153 | ? dwarf2_loclist_block_index | |
23154 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
23155 | SYMBOL_LOCATION_BATON (sym) = baton; |
23156 | } | |
23157 | else | |
23158 | { | |
23159 | struct dwarf2_locexpr_baton *baton; | |
23160 | ||
8d749320 | 23161 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
ae0d2f24 UW |
23162 | baton->per_cu = cu->per_cu; |
23163 | gdb_assert (baton->per_cu); | |
0d53c4c4 | 23164 | |
4fc6c0d5 | 23165 | if (attr->form_is_block ()) |
0d53c4c4 DJ |
23166 | { |
23167 | /* Note that we're just copying the block's data pointer | |
23168 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
23169 | info_buffer for SYM's objfile; right now we never release |
23170 | that buffer, but when we do clean up properly this may | |
23171 | need to change. */ | |
0d53c4c4 DJ |
23172 | baton->size = DW_BLOCK (attr)->size; |
23173 | baton->data = DW_BLOCK (attr)->data; | |
23174 | } | |
23175 | else | |
23176 | { | |
23177 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 23178 | sym->natural_name ()); |
0d53c4c4 | 23179 | baton->size = 0; |
0d53c4c4 | 23180 | } |
6e70227d | 23181 | |
f1e6e072 TT |
23182 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
23183 | ? dwarf2_locexpr_block_index | |
23184 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
23185 | SYMBOL_LOCATION_BATON (sym) = baton; |
23186 | } | |
4c2df51b | 23187 | } |
6502dd73 | 23188 | |
09ba997f | 23189 | /* See read.h. */ |
ae0d2f24 UW |
23190 | |
23191 | struct objfile * | |
09ba997f | 23192 | dwarf2_per_cu_data::objfile () const |
ae0d2f24 | 23193 | { |
09ba997f | 23194 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
ae0d2f24 UW |
23195 | |
23196 | /* Return the master objfile, so that we can report and look up the | |
23197 | correct file containing this variable. */ | |
23198 | if (objfile->separate_debug_objfile_backlink) | |
23199 | objfile = objfile->separate_debug_objfile_backlink; | |
23200 | ||
23201 | return objfile; | |
23202 | } | |
23203 | ||
96408a79 SA |
23204 | /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU |
23205 | (CU_HEADERP is unused in such case) or prepare a temporary copy at | |
23206 | CU_HEADERP first. */ | |
23207 | ||
23208 | static const struct comp_unit_head * | |
23209 | per_cu_header_read_in (struct comp_unit_head *cu_headerp, | |
09ba997f | 23210 | const struct dwarf2_per_cu_data *per_cu) |
96408a79 | 23211 | { |
d521ce57 | 23212 | const gdb_byte *info_ptr; |
96408a79 SA |
23213 | |
23214 | if (per_cu->cu) | |
23215 | return &per_cu->cu->header; | |
23216 | ||
9c541725 | 23217 | info_ptr = per_cu->section->buffer + to_underlying (per_cu->sect_off); |
96408a79 SA |
23218 | |
23219 | memset (cu_headerp, 0, sizeof (*cu_headerp)); | |
43988095 JK |
23220 | read_comp_unit_head (cu_headerp, info_ptr, per_cu->section, |
23221 | rcuh_kind::COMPILE); | |
96408a79 SA |
23222 | |
23223 | return cu_headerp; | |
23224 | } | |
23225 | ||
09ba997f | 23226 | /* See read.h. */ |
ae0d2f24 | 23227 | |
98714339 | 23228 | int |
09ba997f | 23229 | dwarf2_per_cu_data::addr_size () const |
ae0d2f24 | 23230 | { |
96408a79 SA |
23231 | struct comp_unit_head cu_header_local; |
23232 | const struct comp_unit_head *cu_headerp; | |
c471e790 | 23233 | |
09ba997f | 23234 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
23235 | |
23236 | return cu_headerp->addr_size; | |
ae0d2f24 UW |
23237 | } |
23238 | ||
09ba997f | 23239 | /* See read.h. */ |
9eae7c52 TT |
23240 | |
23241 | int | |
09ba997f | 23242 | dwarf2_per_cu_data::offset_size () const |
9eae7c52 | 23243 | { |
96408a79 SA |
23244 | struct comp_unit_head cu_header_local; |
23245 | const struct comp_unit_head *cu_headerp; | |
9c6c53f7 | 23246 | |
09ba997f | 23247 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
23248 | |
23249 | return cu_headerp->offset_size; | |
23250 | } | |
23251 | ||
09ba997f | 23252 | /* See read.h. */ |
96408a79 SA |
23253 | |
23254 | int | |
09ba997f | 23255 | dwarf2_per_cu_data::ref_addr_size () const |
96408a79 SA |
23256 | { |
23257 | struct comp_unit_head cu_header_local; | |
23258 | const struct comp_unit_head *cu_headerp; | |
23259 | ||
09ba997f | 23260 | cu_headerp = per_cu_header_read_in (&cu_header_local, this); |
96408a79 SA |
23261 | |
23262 | if (cu_headerp->version == 2) | |
23263 | return cu_headerp->addr_size; | |
23264 | else | |
23265 | return cu_headerp->offset_size; | |
181cebd4 JK |
23266 | } |
23267 | ||
09ba997f | 23268 | /* See read.h. */ |
9aa1f1e3 TT |
23269 | |
23270 | CORE_ADDR | |
09ba997f | 23271 | dwarf2_per_cu_data::text_offset () const |
9aa1f1e3 | 23272 | { |
09ba997f TT |
23273 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
23274 | ||
23275 | return objfile->text_section_offset (); | |
9aa1f1e3 TT |
23276 | } |
23277 | ||
09ba997f TT |
23278 | /* See read.h. */ |
23279 | ||
23280 | struct type * | |
23281 | dwarf2_per_cu_data::addr_type () const | |
9a49df9d | 23282 | { |
09ba997f | 23283 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
9a49df9d AB |
23284 | struct type *void_type = objfile_type (objfile)->builtin_void; |
23285 | struct type *addr_type = lookup_pointer_type (void_type); | |
09ba997f | 23286 | int addr_size = this->addr_size (); |
9a49df9d AB |
23287 | |
23288 | if (TYPE_LENGTH (addr_type) == addr_size) | |
23289 | return addr_type; | |
23290 | ||
09ba997f | 23291 | addr_type = addr_sized_int_type (TYPE_UNSIGNED (addr_type)); |
9a49df9d AB |
23292 | return addr_type; |
23293 | } | |
23294 | ||
22b6cd70 TT |
23295 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
23296 | the index of the result, and that searches a vector. It will | |
23297 | return a result even if the offset in question does not actually | |
23298 | occur in any CU. This is separate so that it can be unit | |
23299 | tested. */ | |
ae038cb0 | 23300 | |
22b6cd70 TT |
23301 | static int |
23302 | dwarf2_find_containing_comp_unit | |
23303 | (sect_offset sect_off, | |
23304 | unsigned int offset_in_dwz, | |
23305 | const std::vector<dwarf2_per_cu_data *> &all_comp_units) | |
ae038cb0 | 23306 | { |
ae038cb0 DJ |
23307 | int low, high; |
23308 | ||
ae038cb0 | 23309 | low = 0; |
22b6cd70 | 23310 | high = all_comp_units.size () - 1; |
ae038cb0 DJ |
23311 | while (high > low) |
23312 | { | |
36586728 | 23313 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 23314 | int mid = low + (high - low) / 2; |
9a619af0 | 23315 | |
22b6cd70 | 23316 | mid_cu = all_comp_units[mid]; |
36586728 | 23317 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 23318 | || (mid_cu->is_dwz == offset_in_dwz |
22b6cd70 | 23319 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
ae038cb0 DJ |
23320 | high = mid; |
23321 | else | |
23322 | low = mid + 1; | |
23323 | } | |
23324 | gdb_assert (low == high); | |
22b6cd70 TT |
23325 | return low; |
23326 | } | |
23327 | ||
23328 | /* Locate the .debug_info compilation unit from CU's objfile which contains | |
23329 | the DIE at OFFSET. Raises an error on failure. */ | |
23330 | ||
23331 | static struct dwarf2_per_cu_data * | |
23332 | dwarf2_find_containing_comp_unit (sect_offset sect_off, | |
23333 | unsigned int offset_in_dwz, | |
23334 | struct dwarf2_per_objfile *dwarf2_per_objfile) | |
23335 | { | |
23336 | int low | |
23337 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, | |
23338 | dwarf2_per_objfile->all_comp_units); | |
23339 | struct dwarf2_per_cu_data *this_cu | |
23340 | = dwarf2_per_objfile->all_comp_units[low]; | |
23341 | ||
45b8ae0c | 23342 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 23343 | { |
36586728 | 23344 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 23345 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
23346 | "offset %s [in module %s]"), |
23347 | sect_offset_str (sect_off), | |
ed2dc618 | 23348 | bfd_get_filename (dwarf2_per_objfile->objfile->obfd)); |
10b3939b | 23349 | |
9c541725 PA |
23350 | gdb_assert (dwarf2_per_objfile->all_comp_units[low-1]->sect_off |
23351 | <= sect_off); | |
ae038cb0 DJ |
23352 | return dwarf2_per_objfile->all_comp_units[low-1]; |
23353 | } | |
23354 | else | |
23355 | { | |
b76e467d | 23356 | if (low == dwarf2_per_objfile->all_comp_units.size () - 1 |
9c541725 | 23357 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 23358 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 23359 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
23360 | return this_cu; |
23361 | } | |
23362 | } | |
23363 | ||
22b6cd70 TT |
23364 | #if GDB_SELF_TEST |
23365 | ||
23366 | namespace selftests { | |
23367 | namespace find_containing_comp_unit { | |
23368 | ||
23369 | static void | |
23370 | run_test () | |
23371 | { | |
23372 | struct dwarf2_per_cu_data one {}; | |
23373 | struct dwarf2_per_cu_data two {}; | |
23374 | struct dwarf2_per_cu_data three {}; | |
23375 | struct dwarf2_per_cu_data four {}; | |
23376 | ||
23377 | one.length = 5; | |
23378 | two.sect_off = sect_offset (one.length); | |
23379 | two.length = 7; | |
23380 | ||
23381 | three.length = 5; | |
23382 | three.is_dwz = 1; | |
23383 | four.sect_off = sect_offset (three.length); | |
23384 | four.length = 7; | |
23385 | four.is_dwz = 1; | |
23386 | ||
23387 | std::vector<dwarf2_per_cu_data *> units; | |
23388 | units.push_back (&one); | |
23389 | units.push_back (&two); | |
23390 | units.push_back (&three); | |
23391 | units.push_back (&four); | |
23392 | ||
23393 | int result; | |
23394 | ||
23395 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); | |
23396 | SELF_CHECK (units[result] == &one); | |
23397 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); | |
23398 | SELF_CHECK (units[result] == &one); | |
23399 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); | |
23400 | SELF_CHECK (units[result] == &two); | |
23401 | ||
23402 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); | |
23403 | SELF_CHECK (units[result] == &three); | |
23404 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); | |
23405 | SELF_CHECK (units[result] == &three); | |
23406 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); | |
23407 | SELF_CHECK (units[result] == &four); | |
23408 | } | |
23409 | ||
23410 | } | |
23411 | } | |
23412 | ||
23413 | #endif /* GDB_SELF_TEST */ | |
23414 | ||
23745b47 | 23415 | /* Initialize dwarf2_cu CU, owned by PER_CU. */ |
93311388 | 23416 | |
fcd3b13d SM |
23417 | dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data *per_cu_) |
23418 | : per_cu (per_cu_), | |
9068261f AB |
23419 | mark (false), |
23420 | has_loclist (false), | |
23421 | checked_producer (false), | |
23422 | producer_is_gxx_lt_4_6 (false), | |
23423 | producer_is_gcc_lt_4_3 (false), | |
eb77c9df | 23424 | producer_is_icc (false), |
9068261f | 23425 | producer_is_icc_lt_14 (false), |
c258c396 | 23426 | producer_is_codewarrior (false), |
9068261f | 23427 | processing_has_namespace_info (false) |
93311388 | 23428 | { |
fcd3b13d SM |
23429 | per_cu->cu = this; |
23430 | } | |
23431 | ||
23432 | /* Destroy a dwarf2_cu. */ | |
23433 | ||
23434 | dwarf2_cu::~dwarf2_cu () | |
23435 | { | |
23436 | per_cu->cu = NULL; | |
9816fde3 JK |
23437 | } |
23438 | ||
23439 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ | |
23440 | ||
23441 | static void | |
95554aad TT |
23442 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
23443 | enum language pretend_language) | |
9816fde3 JK |
23444 | { |
23445 | struct attribute *attr; | |
23446 | ||
23447 | /* Set the language we're debugging. */ | |
23448 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 23449 | if (attr != nullptr) |
9816fde3 JK |
23450 | set_cu_language (DW_UNSND (attr), cu); |
23451 | else | |
9cded63f | 23452 | { |
95554aad | 23453 | cu->language = pretend_language; |
9cded63f TT |
23454 | cu->language_defn = language_def (cu->language); |
23455 | } | |
dee91e82 | 23456 | |
7d45c7c3 | 23457 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
23458 | } |
23459 | ||
ae038cb0 DJ |
23460 | /* Increase the age counter on each cached compilation unit, and free |
23461 | any that are too old. */ | |
23462 | ||
23463 | static void | |
ed2dc618 | 23464 | age_cached_comp_units (struct dwarf2_per_objfile *dwarf2_per_objfile) |
ae038cb0 DJ |
23465 | { |
23466 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
23467 | ||
23468 | dwarf2_clear_marks (dwarf2_per_objfile->read_in_chain); | |
23469 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23470 | while (per_cu != NULL) | |
23471 | { | |
23472 | per_cu->cu->last_used ++; | |
b4f54984 | 23473 | if (per_cu->cu->last_used <= dwarf_max_cache_age) |
ae038cb0 DJ |
23474 | dwarf2_mark (per_cu->cu); |
23475 | per_cu = per_cu->cu->read_in_chain; | |
23476 | } | |
23477 | ||
23478 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23479 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23480 | while (per_cu != NULL) | |
23481 | { | |
23482 | struct dwarf2_per_cu_data *next_cu; | |
23483 | ||
23484 | next_cu = per_cu->cu->read_in_chain; | |
23485 | ||
23486 | if (!per_cu->cu->mark) | |
23487 | { | |
fcd3b13d | 23488 | delete per_cu->cu; |
ae038cb0 DJ |
23489 | *last_chain = next_cu; |
23490 | } | |
23491 | else | |
23492 | last_chain = &per_cu->cu->read_in_chain; | |
23493 | ||
23494 | per_cu = next_cu; | |
23495 | } | |
23496 | } | |
23497 | ||
23498 | /* Remove a single compilation unit from the cache. */ | |
23499 | ||
23500 | static void | |
dee91e82 | 23501 | free_one_cached_comp_unit (struct dwarf2_per_cu_data *target_per_cu) |
ae038cb0 DJ |
23502 | { |
23503 | struct dwarf2_per_cu_data *per_cu, **last_chain; | |
ed2dc618 SM |
23504 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23505 | = target_per_cu->dwarf2_per_objfile; | |
ae038cb0 DJ |
23506 | |
23507 | per_cu = dwarf2_per_objfile->read_in_chain; | |
23508 | last_chain = &dwarf2_per_objfile->read_in_chain; | |
23509 | while (per_cu != NULL) | |
23510 | { | |
23511 | struct dwarf2_per_cu_data *next_cu; | |
23512 | ||
23513 | next_cu = per_cu->cu->read_in_chain; | |
23514 | ||
dee91e82 | 23515 | if (per_cu == target_per_cu) |
ae038cb0 | 23516 | { |
fcd3b13d | 23517 | delete per_cu->cu; |
dee91e82 | 23518 | per_cu->cu = NULL; |
ae038cb0 DJ |
23519 | *last_chain = next_cu; |
23520 | break; | |
23521 | } | |
23522 | else | |
23523 | last_chain = &per_cu->cu->read_in_chain; | |
23524 | ||
23525 | per_cu = next_cu; | |
23526 | } | |
23527 | } | |
23528 | ||
dee91e82 DE |
23529 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
23530 | We store these in a hash table separate from the DIEs, and preserve them | |
23531 | when the DIEs are flushed out of cache. | |
23532 | ||
23533 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 23534 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
23535 | or the type may come from a DWO file. Furthermore, while it's more logical |
23536 | to use per_cu->section+offset, with Fission the section with the data is in | |
23537 | the DWO file but we don't know that section at the point we need it. | |
23538 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
23539 | because we can enter the lookup routine, get_die_type_at_offset, from | |
23540 | outside this file, and thus won't necessarily have PER_CU->cu. | |
23541 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 23542 | |
dee91e82 | 23543 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 23544 | { |
dee91e82 | 23545 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 23546 | sect_offset sect_off; |
1c379e20 DJ |
23547 | struct type *type; |
23548 | }; | |
23549 | ||
dee91e82 | 23550 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23551 | |
23552 | static hashval_t | |
dee91e82 | 23553 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 23554 | { |
9a3c8263 SM |
23555 | const struct dwarf2_per_cu_offset_and_type *ofs |
23556 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 23557 | |
9c541725 | 23558 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
23559 | } |
23560 | ||
dee91e82 | 23561 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
23562 | |
23563 | static int | |
dee91e82 | 23564 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 23565 | { |
9a3c8263 SM |
23566 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
23567 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
23568 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
23569 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 23570 | |
dee91e82 | 23571 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 23572 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
23573 | } |
23574 | ||
23575 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
23576 | table if necessary. For convenience, return TYPE. |
23577 | ||
23578 | The DIEs reading must have careful ordering to: | |
85102364 | 23579 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
23580 | reading current DIE. |
23581 | * Not trying to dereference contents of still incompletely read in types | |
23582 | while reading in other DIEs. | |
23583 | * Enable referencing still incompletely read in types just by a pointer to | |
23584 | the type without accessing its fields. | |
23585 | ||
23586 | Therefore caller should follow these rules: | |
23587 | * Try to fetch any prerequisite types we may need to build this DIE type | |
23588 | before building the type and calling set_die_type. | |
e71ec853 | 23589 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
23590 | possible before fetching more types to complete the current type. |
23591 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 23592 | |
f792889a | 23593 | static struct type * |
1c379e20 DJ |
23594 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu) |
23595 | { | |
518817b3 SM |
23596 | struct dwarf2_per_objfile *dwarf2_per_objfile |
23597 | = cu->per_cu->dwarf2_per_objfile; | |
dee91e82 | 23598 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
ed2dc618 | 23599 | struct objfile *objfile = dwarf2_per_objfile->objfile; |
3cdcd0ce JB |
23600 | struct attribute *attr; |
23601 | struct dynamic_prop prop; | |
1c379e20 | 23602 | |
b4ba55a1 JB |
23603 | /* For Ada types, make sure that the gnat-specific data is always |
23604 | initialized (if not already set). There are a few types where | |
23605 | we should not be doing so, because the type-specific area is | |
23606 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
23607 | where the type-specific area is used to store the floatformat). | |
23608 | But this is not a problem, because the gnat-specific information | |
23609 | is actually not needed for these types. */ | |
23610 | if (need_gnat_info (cu) | |
23611 | && TYPE_CODE (type) != TYPE_CODE_FUNC | |
23612 | && TYPE_CODE (type) != TYPE_CODE_FLT | |
09e2d7c7 DE |
23613 | && TYPE_CODE (type) != TYPE_CODE_METHODPTR |
23614 | && TYPE_CODE (type) != TYPE_CODE_MEMBERPTR | |
23615 | && TYPE_CODE (type) != TYPE_CODE_METHOD | |
b4ba55a1 JB |
23616 | && !HAVE_GNAT_AUX_INFO (type)) |
23617 | INIT_GNAT_SPECIFIC (type); | |
23618 | ||
3f2f83dd KB |
23619 | /* Read DW_AT_allocated and set in type. */ |
23620 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
4fc6c0d5 | 23621 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 23622 | { |
09ba997f | 23623 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 23624 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
50a82047 | 23625 | add_dyn_prop (DYN_PROP_ALLOCATED, prop, type); |
3f2f83dd KB |
23626 | } |
23627 | else if (attr != NULL) | |
23628 | { | |
b98664d3 | 23629 | complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"), |
9c541725 | 23630 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 23631 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
23632 | } |
23633 | ||
23634 | /* Read DW_AT_associated and set in type. */ | |
23635 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
4fc6c0d5 | 23636 | if (attr != NULL && attr->form_is_block ()) |
3f2f83dd | 23637 | { |
09ba997f | 23638 | struct type *prop_type = cu->per_cu->addr_sized_int_type (false); |
9a49df9d | 23639 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
50a82047 | 23640 | add_dyn_prop (DYN_PROP_ASSOCIATED, prop, type); |
3f2f83dd KB |
23641 | } |
23642 | else if (attr != NULL) | |
23643 | { | |
b98664d3 | 23644 | complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"), |
9c541725 | 23645 | (attr != NULL ? dwarf_form_name (attr->form) : "n/a"), |
9d8780f0 | 23646 | sect_offset_str (die->sect_off)); |
3f2f83dd KB |
23647 | } |
23648 | ||
3cdcd0ce JB |
23649 | /* Read DW_AT_data_location and set in type. */ |
23650 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
9a49df9d | 23651 | if (attr_to_dynamic_prop (attr, die, cu, &prop, |
09ba997f | 23652 | cu->per_cu->addr_type ())) |
50a82047 | 23653 | add_dyn_prop (DYN_PROP_DATA_LOCATION, prop, type); |
3cdcd0ce | 23654 | |
dee91e82 | 23655 | if (dwarf2_per_objfile->die_type_hash == NULL) |
0335378b TT |
23656 | dwarf2_per_objfile->die_type_hash |
23657 | = htab_up (htab_create_alloc (127, | |
23658 | per_cu_offset_and_type_hash, | |
23659 | per_cu_offset_and_type_eq, | |
23660 | NULL, xcalloc, xfree)); | |
1c379e20 | 23661 | |
dee91e82 | 23662 | ofs.per_cu = cu->per_cu; |
9c541725 | 23663 | ofs.sect_off = die->sect_off; |
1c379e20 | 23664 | ofs.type = type; |
dee91e82 | 23665 | slot = (struct dwarf2_per_cu_offset_and_type **) |
0335378b | 23666 | htab_find_slot (dwarf2_per_objfile->die_type_hash.get (), &ofs, INSERT); |
7e314c57 | 23667 | if (*slot) |
b98664d3 | 23668 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 23669 | sect_offset_str (die->sect_off)); |
8d749320 SM |
23670 | *slot = XOBNEW (&objfile->objfile_obstack, |
23671 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 23672 | **slot = ofs; |
f792889a | 23673 | return type; |
1c379e20 DJ |
23674 | } |
23675 | ||
9c541725 | 23676 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 23677 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
23678 | |
23679 | static struct type * | |
9c541725 | 23680 | get_die_type_at_offset (sect_offset sect_off, |
673bfd45 | 23681 | struct dwarf2_per_cu_data *per_cu) |
1c379e20 | 23682 | { |
dee91e82 | 23683 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
ed2dc618 | 23684 | struct dwarf2_per_objfile *dwarf2_per_objfile = per_cu->dwarf2_per_objfile; |
f792889a | 23685 | |
dee91e82 | 23686 | if (dwarf2_per_objfile->die_type_hash == NULL) |
f792889a | 23687 | return NULL; |
1c379e20 | 23688 | |
dee91e82 | 23689 | ofs.per_cu = per_cu; |
9c541725 | 23690 | ofs.sect_off = sect_off; |
9a3c8263 | 23691 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
0335378b | 23692 | htab_find (dwarf2_per_objfile->die_type_hash.get (), &ofs)); |
1c379e20 DJ |
23693 | if (slot) |
23694 | return slot->type; | |
23695 | else | |
23696 | return NULL; | |
23697 | } | |
23698 | ||
02142a6c | 23699 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
23700 | or return NULL if DIE does not have a saved type. */ |
23701 | ||
23702 | static struct type * | |
23703 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
23704 | { | |
9c541725 | 23705 | return get_die_type_at_offset (die->sect_off, cu->per_cu); |
673bfd45 DE |
23706 | } |
23707 | ||
10b3939b DJ |
23708 | /* Add a dependence relationship from CU to REF_PER_CU. */ |
23709 | ||
23710 | static void | |
23711 | dwarf2_add_dependence (struct dwarf2_cu *cu, | |
23712 | struct dwarf2_per_cu_data *ref_per_cu) | |
23713 | { | |
23714 | void **slot; | |
23715 | ||
23716 | if (cu->dependencies == NULL) | |
23717 | cu->dependencies | |
23718 | = htab_create_alloc_ex (5, htab_hash_pointer, htab_eq_pointer, | |
23719 | NULL, &cu->comp_unit_obstack, | |
23720 | hashtab_obstack_allocate, | |
23721 | dummy_obstack_deallocate); | |
23722 | ||
23723 | slot = htab_find_slot (cu->dependencies, ref_per_cu, INSERT); | |
23724 | if (*slot == NULL) | |
23725 | *slot = ref_per_cu; | |
23726 | } | |
1c379e20 | 23727 | |
f504f079 DE |
23728 | /* Subroutine of dwarf2_mark to pass to htab_traverse. |
23729 | Set the mark field in every compilation unit in the | |
ae038cb0 DJ |
23730 | cache that we must keep because we are keeping CU. */ |
23731 | ||
10b3939b DJ |
23732 | static int |
23733 | dwarf2_mark_helper (void **slot, void *data) | |
23734 | { | |
23735 | struct dwarf2_per_cu_data *per_cu; | |
23736 | ||
23737 | per_cu = (struct dwarf2_per_cu_data *) *slot; | |
d07ed419 JK |
23738 | |
23739 | /* cu->dependencies references may not yet have been ever read if QUIT aborts | |
23740 | reading of the chain. As such dependencies remain valid it is not much | |
23741 | useful to track and undo them during QUIT cleanups. */ | |
23742 | if (per_cu->cu == NULL) | |
23743 | return 1; | |
23744 | ||
10b3939b DJ |
23745 | if (per_cu->cu->mark) |
23746 | return 1; | |
9068261f | 23747 | per_cu->cu->mark = true; |
10b3939b DJ |
23748 | |
23749 | if (per_cu->cu->dependencies != NULL) | |
23750 | htab_traverse (per_cu->cu->dependencies, dwarf2_mark_helper, NULL); | |
23751 | ||
23752 | return 1; | |
23753 | } | |
23754 | ||
f504f079 DE |
23755 | /* Set the mark field in CU and in every other compilation unit in the |
23756 | cache that we must keep because we are keeping CU. */ | |
23757 | ||
ae038cb0 DJ |
23758 | static void |
23759 | dwarf2_mark (struct dwarf2_cu *cu) | |
23760 | { | |
23761 | if (cu->mark) | |
23762 | return; | |
9068261f | 23763 | cu->mark = true; |
10b3939b DJ |
23764 | if (cu->dependencies != NULL) |
23765 | htab_traverse (cu->dependencies, dwarf2_mark_helper, NULL); | |
ae038cb0 DJ |
23766 | } |
23767 | ||
23768 | static void | |
23769 | dwarf2_clear_marks (struct dwarf2_per_cu_data *per_cu) | |
23770 | { | |
23771 | while (per_cu) | |
23772 | { | |
9068261f | 23773 | per_cu->cu->mark = false; |
ae038cb0 DJ |
23774 | per_cu = per_cu->cu->read_in_chain; |
23775 | } | |
72bf9492 DJ |
23776 | } |
23777 | ||
72bf9492 DJ |
23778 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
23779 | is its offset in .debug_info for this objfile. */ | |
23780 | ||
23781 | static hashval_t | |
23782 | partial_die_hash (const void *item) | |
23783 | { | |
9a3c8263 SM |
23784 | const struct partial_die_info *part_die |
23785 | = (const struct partial_die_info *) item; | |
9a619af0 | 23786 | |
9c541725 | 23787 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
23788 | } |
23789 | ||
23790 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
23791 | are equal if they have the same offset. */ | |
23792 | ||
23793 | static int | |
23794 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
23795 | { | |
9a3c8263 SM |
23796 | const struct partial_die_info *part_die_lhs |
23797 | = (const struct partial_die_info *) item_lhs; | |
23798 | const struct partial_die_info *part_die_rhs | |
23799 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 23800 | |
9c541725 | 23801 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
23802 | } |
23803 | ||
3c3bb058 AB |
23804 | struct cmd_list_element *set_dwarf_cmdlist; |
23805 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 DJ |
23806 | |
23807 | static void | |
981a3fb3 | 23808 | set_dwarf_cmd (const char *args, int from_tty) |
ae038cb0 | 23809 | { |
b4f54984 | 23810 | help_list (set_dwarf_cmdlist, "maintenance set dwarf ", all_commands, |
635c7e8a | 23811 | gdb_stdout); |
ae038cb0 DJ |
23812 | } |
23813 | ||
23814 | static void | |
981a3fb3 | 23815 | show_dwarf_cmd (const char *args, int from_tty) |
6e70227d | 23816 | { |
b4f54984 | 23817 | cmd_show_list (show_dwarf_cmdlist, from_tty, ""); |
ae038cb0 DJ |
23818 | } |
23819 | ||
9291a0cd | 23820 | static void |
cd4fb1b2 SM |
23821 | show_check_physname (struct ui_file *file, int from_tty, |
23822 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 23823 | { |
cd4fb1b2 SM |
23824 | fprintf_filtered (file, |
23825 | _("Whether to check \"physname\" is %s.\n"), | |
23826 | value); | |
9291a0cd TT |
23827 | } |
23828 | ||
6c265988 | 23829 | void _initialize_dwarf2_read (); |
cd4fb1b2 | 23830 | void |
6c265988 | 23831 | _initialize_dwarf2_read () |
9291a0cd | 23832 | { |
cd4fb1b2 SM |
23833 | add_prefix_cmd ("dwarf", class_maintenance, set_dwarf_cmd, _("\ |
23834 | Set DWARF specific variables.\n\ | |
590042fc | 23835 | Configure DWARF variables such as the cache size."), |
cd4fb1b2 SM |
23836 | &set_dwarf_cmdlist, "maintenance set dwarf ", |
23837 | 0/*allow-unknown*/, &maintenance_set_cmdlist); | |
156942c7 | 23838 | |
cd4fb1b2 | 23839 | add_prefix_cmd ("dwarf", class_maintenance, show_dwarf_cmd, _("\ |
590042fc PW |
23840 | Show DWARF specific variables.\n\ |
23841 | Show DWARF variables such as the cache size."), | |
cd4fb1b2 SM |
23842 | &show_dwarf_cmdlist, "maintenance show dwarf ", |
23843 | 0/*allow-unknown*/, &maintenance_show_cmdlist); | |
156942c7 | 23844 | |
cd4fb1b2 SM |
23845 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
23846 | &dwarf_max_cache_age, _("\ | |
23847 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
23848 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
23849 | A higher limit means that cached compilation units will be stored\n\ | |
23850 | in memory longer, and more total memory will be used. Zero disables\n\ | |
23851 | caching, which can slow down startup."), | |
23852 | NULL, | |
23853 | show_dwarf_max_cache_age, | |
23854 | &set_dwarf_cmdlist, | |
23855 | &show_dwarf_cmdlist); | |
156942c7 | 23856 | |
cd4fb1b2 SM |
23857 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
23858 | Set debugging of the DWARF reader."), _("\ | |
23859 | Show debugging of the DWARF reader."), _("\ | |
23860 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
23861 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
23862 | information. A value greater than 1 provides more verbose information."), | |
23863 | NULL, | |
23864 | NULL, | |
23865 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23866 | |
cd4fb1b2 SM |
23867 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
23868 | Set debugging of the DWARF DIE reader."), _("\ | |
23869 | Show debugging of the DWARF DIE reader."), _("\ | |
23870 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
23871 | The value is the maximum depth to print."), | |
23872 | NULL, | |
23873 | NULL, | |
23874 | &setdebuglist, &showdebuglist); | |
9291a0cd | 23875 | |
cd4fb1b2 SM |
23876 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
23877 | Set debugging of the dwarf line reader."), _("\ | |
23878 | Show debugging of the dwarf line reader."), _("\ | |
23879 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
23880 | A value of 1 (one) provides basic information.\n\ | |
23881 | A value greater than 1 provides more verbose information."), | |
23882 | NULL, | |
23883 | NULL, | |
23884 | &setdebuglist, &showdebuglist); | |
437afbb8 | 23885 | |
cd4fb1b2 SM |
23886 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
23887 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
23888 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
23889 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
23890 | the demangler."), | |
23891 | NULL, show_check_physname, | |
23892 | &setdebuglist, &showdebuglist); | |
900e11f9 | 23893 | |
e615022a DE |
23894 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
23895 | no_class, &use_deprecated_index_sections, _("\ | |
23896 | Set whether to use deprecated gdb_index sections."), _("\ | |
23897 | Show whether to use deprecated gdb_index sections."), _("\ | |
23898 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
23899 | Normally they are ignored either because of a missing feature or\n\ | |
23900 | performance issue.\n\ | |
23901 | Warning: This option must be enabled before gdb reads the file."), | |
23902 | NULL, | |
23903 | NULL, | |
23904 | &setlist, &showlist); | |
23905 | ||
f1e6e072 TT |
23906 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
23907 | &dwarf2_locexpr_funcs); | |
23908 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
23909 | &dwarf2_loclist_funcs); | |
23910 | ||
23911 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23912 | &dwarf2_block_frame_base_locexpr_funcs); | |
23913 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
23914 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
23915 | |
23916 | #if GDB_SELF_TEST | |
23917 | selftests::register_test ("dw2_expand_symtabs_matching", | |
23918 | selftests::dw2_expand_symtabs_matching::run_test); | |
22b6cd70 TT |
23919 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
23920 | selftests::find_containing_comp_unit::run_test); | |
c62446b1 | 23921 | #endif |
6502dd73 | 23922 | } |