Commit | Line | Data |
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c906108c | 1 | /* DWARF 2 debugging format support for GDB. |
917c78fc | 2 | |
3666a048 | 3 | Copyright (C) 1994-2021 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" |
cd53fa40 | 35 | #include "dwarf2/comp-unit-head.h" |
8ae78a44 | 36 | #include "dwarf2/cu.h" |
82ca8957 TT |
37 | #include "dwarf2/index-cache.h" |
38 | #include "dwarf2/index-common.h" | |
f4382c45 | 39 | #include "dwarf2/leb.h" |
8fdd972c | 40 | #include "dwarf2/line-header.h" |
9fda78b6 | 41 | #include "dwarf2/dwz.h" |
c90ec28a | 42 | #include "dwarf2/macro.h" |
c2d50fd0 | 43 | #include "dwarf2/die.h" |
c2a62a3d | 44 | #include "dwarf2/sect-names.h" |
2b2558bf | 45 | #include "dwarf2/stringify.h" |
70182375 | 46 | #include "dwarf2/public.h" |
4de283e4 TT |
47 | #include "bfd.h" |
48 | #include "elf-bfd.h" | |
49 | #include "symtab.h" | |
50 | #include "gdbtypes.h" | |
51 | #include "objfiles.h" | |
d55e5aa6 | 52 | #include "dwarf2.h" |
4de283e4 TT |
53 | #include "demangle.h" |
54 | #include "gdb-demangle.h" | |
4de283e4 | 55 | #include "filenames.h" /* for DOSish file names */ |
4de283e4 TT |
56 | #include "language.h" |
57 | #include "complaints.h" | |
82ca8957 TT |
58 | #include "dwarf2/expr.h" |
59 | #include "dwarf2/loc.h" | |
4de283e4 TT |
60 | #include "cp-support.h" |
61 | #include "hashtab.h" | |
62 | #include "command.h" | |
d55e5aa6 | 63 | #include "gdbcmd.h" |
4de283e4 TT |
64 | #include "block.h" |
65 | #include "addrmap.h" | |
66 | #include "typeprint.h" | |
67 | #include "psympriv.h" | |
4de283e4 | 68 | #include "c-lang.h" |
d55e5aa6 | 69 | #include "go-lang.h" |
4de283e4 TT |
70 | #include "valprint.h" |
71 | #include "gdbcore.h" /* for gnutarget */ | |
72 | #include "gdb/gdb-index.h" | |
4de283e4 TT |
73 | #include "gdb_bfd.h" |
74 | #include "f-lang.h" | |
75 | #include "source.h" | |
4de283e4 | 76 | #include "build-id.h" |
d55e5aa6 | 77 | #include "namespace.h" |
268a13a5 TT |
78 | #include "gdbsupport/function-view.h" |
79 | #include "gdbsupport/gdb_optional.h" | |
80 | #include "gdbsupport/underlying.h" | |
268a13a5 | 81 | #include "gdbsupport/hash_enum.h" |
4de283e4 | 82 | #include "filename-seen-cache.h" |
b32b108a | 83 | #include "producer.h" |
4de283e4 | 84 | #include <fcntl.h> |
4de283e4 | 85 | #include <algorithm> |
4de283e4 | 86 | #include <unordered_map> |
268a13a5 | 87 | #include "gdbsupport/selftest.h" |
c9317f21 | 88 | #include "rust-lang.h" |
268a13a5 | 89 | #include "gdbsupport/pathstuff.h" |
edd45eb0 | 90 | #include "count-one-bits.h" |
9fc29955 | 91 | #include <unordered_set> |
437afbb8 | 92 | |
73be47f5 DE |
93 | /* When == 1, print basic high level tracing messages. |
94 | When > 1, be more verbose. | |
b4f54984 DE |
95 | This is in contrast to the low level DIE reading of dwarf_die_debug. */ |
96 | static unsigned int dwarf_read_debug = 0; | |
45cfd468 | 97 | |
6f738b01 SM |
98 | /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 1. */ |
99 | ||
100 | #define dwarf_read_debug_printf(fmt, ...) \ | |
74b773fc SM |
101 | debug_prefixed_printf_cond (dwarf_read_debug >= 1, "dwarf-read", fmt, \ |
102 | ##__VA_ARGS__) | |
6f738b01 SM |
103 | |
104 | /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 2. */ | |
105 | ||
106 | #define dwarf_read_debug_printf_v(fmt, ...) \ | |
74b773fc SM |
107 | debug_prefixed_printf_cond (dwarf_read_debug >= 2, "dwarf-read", fmt, \ |
108 | ##__VA_ARGS__) | |
6f738b01 | 109 | |
d97bc12b | 110 | /* When non-zero, dump DIEs after they are read in. */ |
b4f54984 | 111 | static unsigned int dwarf_die_debug = 0; |
d97bc12b | 112 | |
27e0867f | 113 | /* When non-zero, dump line number entries as they are read in. */ |
8fdd972c | 114 | unsigned int dwarf_line_debug = 0; |
27e0867f | 115 | |
491144b5 CB |
116 | /* When true, cross-check physname against demangler. */ |
117 | static bool check_physname = false; | |
900e11f9 | 118 | |
491144b5 CB |
119 | /* When true, do not reject deprecated .gdb_index sections. */ |
120 | static bool use_deprecated_index_sections = false; | |
481860b3 | 121 | |
17ee85fc TT |
122 | /* This is used to store the data that is always per objfile. */ |
123 | static const objfile_key<dwarf2_per_objfile> dwarf2_objfile_data_key; | |
124 | ||
125 | /* These are used to store the dwarf2_per_bfd objects. | |
126 | ||
127 | objfiles having the same BFD, which doesn't require relocations, are going to | |
128 | share a dwarf2_per_bfd object, which is held in the _bfd_data_key version. | |
129 | ||
130 | Other objfiles are not going to share a dwarf2_per_bfd with any other | |
131 | objfiles, so they'll have their own version kept in the _objfile_data_key | |
132 | version. */ | |
133 | static const struct bfd_key<dwarf2_per_bfd> dwarf2_per_bfd_bfd_data_key; | |
134 | static const struct objfile_key<dwarf2_per_bfd> dwarf2_per_bfd_objfile_data_key; | |
6502dd73 | 135 | |
f1e6e072 TT |
136 | /* The "aclass" indices for various kinds of computed DWARF symbols. */ |
137 | ||
138 | static int dwarf2_locexpr_index; | |
139 | static int dwarf2_loclist_index; | |
140 | static int dwarf2_locexpr_block_index; | |
141 | static int dwarf2_loclist_block_index; | |
142 | ||
41144253 | 143 | /* Size of .debug_loclists section header for 32-bit DWARF format. */ |
144 | #define LOCLIST_HEADER_SIZE32 12 | |
145 | ||
146 | /* Size of .debug_loclists section header for 64-bit DWARF format. */ | |
147 | #define LOCLIST_HEADER_SIZE64 20 | |
148 | ||
d0ce17d8 CT |
149 | /* Size of .debug_rnglists section header for 32-bit DWARF format. */ |
150 | #define RNGLIST_HEADER_SIZE32 12 | |
151 | ||
152 | /* Size of .debug_rnglists section header for 64-bit DWARF format. */ | |
153 | #define RNGLIST_HEADER_SIZE64 20 | |
154 | ||
3f563c84 PA |
155 | /* An index into a (C++) symbol name component in a symbol name as |
156 | recorded in the mapped_index's symbol table. For each C++ symbol | |
157 | in the symbol table, we record one entry for the start of each | |
158 | component in the symbol in a table of name components, and then | |
159 | sort the table, in order to be able to binary search symbol names, | |
160 | ignoring leading namespaces, both completion and regular look up. | |
161 | For example, for symbol "A::B::C", we'll have an entry that points | |
162 | to "A::B::C", another that points to "B::C", and another for "C". | |
163 | Note that function symbols in GDB index have no parameter | |
164 | information, just the function/method names. You can convert a | |
165 | name_component to a "const char *" using the | |
166 | 'mapped_index::symbol_name_at(offset_type)' method. */ | |
167 | ||
168 | struct name_component | |
169 | { | |
170 | /* Offset in the symbol name where the component starts. Stored as | |
171 | a (32-bit) offset instead of a pointer to save memory and improve | |
172 | locality on 64-bit architectures. */ | |
173 | offset_type name_offset; | |
174 | ||
175 | /* The symbol's index in the symbol and constant pool tables of a | |
176 | mapped_index. */ | |
177 | offset_type idx; | |
178 | }; | |
179 | ||
44ed8f3e PA |
180 | /* Base class containing bits shared by both .gdb_index and |
181 | .debug_name indexes. */ | |
182 | ||
183 | struct mapped_index_base | |
184 | { | |
22ca247e TT |
185 | mapped_index_base () = default; |
186 | DISABLE_COPY_AND_ASSIGN (mapped_index_base); | |
187 | ||
44ed8f3e PA |
188 | /* The name_component table (a sorted vector). See name_component's |
189 | description above. */ | |
190 | std::vector<name_component> name_components; | |
191 | ||
192 | /* How NAME_COMPONENTS is sorted. */ | |
193 | enum case_sensitivity name_components_casing; | |
194 | ||
195 | /* Return the number of names in the symbol table. */ | |
196 | virtual size_t symbol_name_count () const = 0; | |
197 | ||
198 | /* Get the name of the symbol at IDX in the symbol table. */ | |
fcf23d5b SM |
199 | virtual const char *symbol_name_at |
200 | (offset_type idx, dwarf2_per_objfile *per_objfile) const = 0; | |
44ed8f3e PA |
201 | |
202 | /* Return whether the name at IDX in the symbol table should be | |
203 | ignored. */ | |
204 | virtual bool symbol_name_slot_invalid (offset_type idx) const | |
205 | { | |
206 | return false; | |
207 | } | |
208 | ||
209 | /* Build the symbol name component sorted vector, if we haven't | |
210 | yet. */ | |
fcf23d5b | 211 | void build_name_components (dwarf2_per_objfile *per_objfile); |
44ed8f3e PA |
212 | |
213 | /* Returns the lower (inclusive) and upper (exclusive) bounds of the | |
214 | possible matches for LN_NO_PARAMS in the name component | |
215 | vector. */ | |
216 | std::pair<std::vector<name_component>::const_iterator, | |
217 | std::vector<name_component>::const_iterator> | |
3b00ef10 | 218 | find_name_components_bounds (const lookup_name_info &ln_no_params, |
fcf23d5b SM |
219 | enum language lang, |
220 | dwarf2_per_objfile *per_objfile) const; | |
44ed8f3e PA |
221 | |
222 | /* Prevent deleting/destroying via a base class pointer. */ | |
223 | protected: | |
224 | ~mapped_index_base() = default; | |
225 | }; | |
226 | ||
42c2c694 TT |
227 | /* This is a view into the index that converts from bytes to an |
228 | offset_type, and allows indexing. Unaligned bytes are specifically | |
229 | allowed here, and handled via unpacking. */ | |
230 | ||
231 | class offset_view | |
232 | { | |
233 | public: | |
234 | offset_view () = default; | |
235 | ||
236 | explicit offset_view (gdb::array_view<const gdb_byte> bytes) | |
237 | : m_bytes (bytes) | |
238 | { | |
239 | } | |
240 | ||
241 | /* Extract the INDEXth offset_type from the array. */ | |
242 | offset_type operator[] (size_t index) const | |
243 | { | |
244 | const gdb_byte *bytes = &m_bytes[index * sizeof (offset_type)]; | |
245 | return (offset_type) extract_unsigned_integer (bytes, | |
246 | sizeof (offset_type), | |
247 | BFD_ENDIAN_LITTLE); | |
248 | } | |
249 | ||
250 | /* Return the number of offset_types in this array. */ | |
251 | size_t size () const | |
252 | { | |
253 | return m_bytes.size () / sizeof (offset_type); | |
254 | } | |
255 | ||
256 | /* Return true if this view is empty. */ | |
257 | bool empty () const | |
258 | { | |
259 | return m_bytes.empty (); | |
260 | } | |
261 | ||
262 | private: | |
263 | /* The underlying bytes. */ | |
264 | gdb::array_view<const gdb_byte> m_bytes; | |
265 | }; | |
266 | ||
9291a0cd TT |
267 | /* A description of the mapped index. The file format is described in |
268 | a comment by the code that writes the index. */ | |
fc898b42 | 269 | struct mapped_index final : public mapped_index_base |
9291a0cd | 270 | { |
559a7a62 | 271 | /* Index data format version. */ |
3063847f | 272 | int version = 0; |
559a7a62 | 273 | |
f00a2de2 PA |
274 | /* The address table data. */ |
275 | gdb::array_view<const gdb_byte> address_table; | |
b11b1f88 | 276 | |
3876f04e | 277 | /* The symbol table, implemented as a hash table. */ |
42c2c694 | 278 | offset_view symbol_table; |
b11b1f88 | 279 | |
9291a0cd | 280 | /* A pointer to the constant pool. */ |
42c2c694 TT |
281 | gdb::array_view<const gdb_byte> constant_pool; |
282 | ||
283 | /* Return the index into the constant pool of the name of the IDXth | |
284 | symbol in the symbol table. */ | |
285 | offset_type symbol_name_index (offset_type idx) const | |
286 | { | |
287 | return symbol_table[2 * idx]; | |
288 | } | |
289 | ||
290 | /* Return the index into the constant pool of the CU vector of the | |
291 | IDXth symbol in the symbol table. */ | |
292 | offset_type symbol_vec_index (offset_type idx) const | |
293 | { | |
294 | return symbol_table[2 * idx + 1]; | |
295 | } | |
3f563c84 | 296 | |
44ed8f3e PA |
297 | bool symbol_name_slot_invalid (offset_type idx) const override |
298 | { | |
42c2c694 TT |
299 | return (symbol_name_index (idx) == 0 |
300 | && symbol_vec_index (idx) == 0); | |
44ed8f3e | 301 | } |
5c58de74 | 302 | |
3f563c84 PA |
303 | /* Convenience method to get at the name of the symbol at IDX in the |
304 | symbol table. */ | |
fcf23d5b SM |
305 | const char *symbol_name_at |
306 | (offset_type idx, dwarf2_per_objfile *per_objfile) const override | |
42c2c694 TT |
307 | { |
308 | return (const char *) (this->constant_pool.data () | |
309 | + symbol_name_index (idx)); | |
310 | } | |
5c58de74 | 311 | |
44ed8f3e | 312 | size_t symbol_name_count () const override |
42c2c694 | 313 | { return this->symbol_table.size () / 2; } |
9291a0cd TT |
314 | }; |
315 | ||
927aa2e7 JK |
316 | /* A description of the mapped .debug_names. |
317 | Uninitialized map has CU_COUNT 0. */ | |
fc898b42 | 318 | struct mapped_debug_names final : public mapped_index_base |
927aa2e7 JK |
319 | { |
320 | bfd_endian dwarf5_byte_order; | |
321 | bool dwarf5_is_dwarf64; | |
322 | bool augmentation_is_gdb; | |
323 | uint8_t offset_size; | |
324 | uint32_t cu_count = 0; | |
325 | uint32_t tu_count, bucket_count, name_count; | |
326 | const gdb_byte *cu_table_reordered, *tu_table_reordered; | |
327 | const uint32_t *bucket_table_reordered, *hash_table_reordered; | |
328 | const gdb_byte *name_table_string_offs_reordered; | |
329 | const gdb_byte *name_table_entry_offs_reordered; | |
330 | const gdb_byte *entry_pool; | |
331 | ||
332 | struct index_val | |
333 | { | |
334 | ULONGEST dwarf_tag; | |
335 | struct attr | |
336 | { | |
337 | /* Attribute name DW_IDX_*. */ | |
338 | ULONGEST dw_idx; | |
339 | ||
340 | /* Attribute form DW_FORM_*. */ | |
341 | ULONGEST form; | |
342 | ||
343 | /* Value if FORM is DW_FORM_implicit_const. */ | |
344 | LONGEST implicit_const; | |
345 | }; | |
346 | std::vector<attr> attr_vec; | |
347 | }; | |
348 | ||
349 | std::unordered_map<ULONGEST, index_val> abbrev_map; | |
350 | ||
fcf23d5b SM |
351 | const char *namei_to_name |
352 | (uint32_t namei, dwarf2_per_objfile *per_objfile) const; | |
44ed8f3e PA |
353 | |
354 | /* Implementation of the mapped_index_base virtual interface, for | |
355 | the name_components cache. */ | |
356 | ||
fcf23d5b SM |
357 | const char *symbol_name_at |
358 | (offset_type idx, dwarf2_per_objfile *per_objfile) const override | |
359 | { return namei_to_name (idx, per_objfile); } | |
44ed8f3e PA |
360 | |
361 | size_t symbol_name_count () const override | |
362 | { return this->name_count; } | |
927aa2e7 JK |
363 | }; |
364 | ||
cd4fb1b2 | 365 | /* See dwarf2read.h. */ |
ed2dc618 | 366 | |
cd4fb1b2 | 367 | dwarf2_per_objfile * |
ed2dc618 SM |
368 | get_dwarf2_per_objfile (struct objfile *objfile) |
369 | { | |
5bfd760d | 370 | return dwarf2_objfile_data_key.get (objfile); |
ed2dc618 | 371 | } |
c906108c | 372 | |
251d32d9 | 373 | /* Default names of the debugging sections. */ |
c906108c | 374 | |
233a11ab CS |
375 | /* Note that if the debugging section has been compressed, it might |
376 | have a name like .zdebug_info. */ | |
377 | ||
9938d15a | 378 | const struct dwarf2_debug_sections dwarf2_elf_names = |
9cdd5dbd | 379 | { |
251d32d9 TG |
380 | { ".debug_info", ".zdebug_info" }, |
381 | { ".debug_abbrev", ".zdebug_abbrev" }, | |
382 | { ".debug_line", ".zdebug_line" }, | |
383 | { ".debug_loc", ".zdebug_loc" }, | |
43988095 | 384 | { ".debug_loclists", ".zdebug_loclists" }, |
251d32d9 | 385 | { ".debug_macinfo", ".zdebug_macinfo" }, |
cf2c3c16 | 386 | { ".debug_macro", ".zdebug_macro" }, |
251d32d9 | 387 | { ".debug_str", ".zdebug_str" }, |
18a8505e | 388 | { ".debug_str_offsets", ".zdebug_str_offsets" }, |
43988095 | 389 | { ".debug_line_str", ".zdebug_line_str" }, |
251d32d9 | 390 | { ".debug_ranges", ".zdebug_ranges" }, |
43988095 | 391 | { ".debug_rnglists", ".zdebug_rnglists" }, |
251d32d9 | 392 | { ".debug_types", ".zdebug_types" }, |
3019eac3 | 393 | { ".debug_addr", ".zdebug_addr" }, |
251d32d9 TG |
394 | { ".debug_frame", ".zdebug_frame" }, |
395 | { ".eh_frame", NULL }, | |
24d3216f | 396 | { ".gdb_index", ".zgdb_index" }, |
927aa2e7 JK |
397 | { ".debug_names", ".zdebug_names" }, |
398 | { ".debug_aranges", ".zdebug_aranges" }, | |
24d3216f | 399 | 23 |
251d32d9 | 400 | }; |
c906108c | 401 | |
80626a55 | 402 | /* List of DWO/DWP sections. */ |
3019eac3 | 403 | |
80626a55 | 404 | static const struct dwop_section_names |
3019eac3 DE |
405 | { |
406 | struct dwarf2_section_names abbrev_dwo; | |
407 | struct dwarf2_section_names info_dwo; | |
408 | struct dwarf2_section_names line_dwo; | |
409 | struct dwarf2_section_names loc_dwo; | |
43988095 | 410 | struct dwarf2_section_names loclists_dwo; |
09262596 DE |
411 | struct dwarf2_section_names macinfo_dwo; |
412 | struct dwarf2_section_names macro_dwo; | |
d0ce17d8 | 413 | struct dwarf2_section_names rnglists_dwo; |
3019eac3 DE |
414 | struct dwarf2_section_names str_dwo; |
415 | struct dwarf2_section_names str_offsets_dwo; | |
416 | struct dwarf2_section_names types_dwo; | |
80626a55 DE |
417 | struct dwarf2_section_names cu_index; |
418 | struct dwarf2_section_names tu_index; | |
3019eac3 | 419 | } |
80626a55 | 420 | dwop_section_names = |
3019eac3 DE |
421 | { |
422 | { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" }, | |
423 | { ".debug_info.dwo", ".zdebug_info.dwo" }, | |
424 | { ".debug_line.dwo", ".zdebug_line.dwo" }, | |
425 | { ".debug_loc.dwo", ".zdebug_loc.dwo" }, | |
43988095 | 426 | { ".debug_loclists.dwo", ".zdebug_loclists.dwo" }, |
09262596 DE |
427 | { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" }, |
428 | { ".debug_macro.dwo", ".zdebug_macro.dwo" }, | |
d0ce17d8 | 429 | { ".debug_rnglists.dwo", ".zdebug_rnglists.dwo" }, |
3019eac3 DE |
430 | { ".debug_str.dwo", ".zdebug_str.dwo" }, |
431 | { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" }, | |
432 | { ".debug_types.dwo", ".zdebug_types.dwo" }, | |
80626a55 DE |
433 | { ".debug_cu_index", ".zdebug_cu_index" }, |
434 | { ".debug_tu_index", ".zdebug_tu_index" }, | |
3019eac3 DE |
435 | }; |
436 | ||
c906108c SS |
437 | /* local data types */ |
438 | ||
d0ce17d8 CT |
439 | /* The location list and range list sections (.debug_loclists & .debug_rnglists) |
440 | begin with a header, which contains the following information. */ | |
441 | struct loclists_rnglists_header | |
41144253 | 442 | { |
443 | /* A 4-byte or 12-byte length containing the length of the | |
444 | set of entries for this compilation unit, not including the | |
445 | length field itself. */ | |
446 | unsigned int length; | |
447 | ||
448 | /* A 2-byte version identifier. */ | |
449 | short version; | |
450 | ||
451 | /* A 1-byte unsigned integer containing the size in bytes of an address on | |
452 | the target system. */ | |
453 | unsigned char addr_size; | |
454 | ||
455 | /* A 1-byte unsigned integer containing the size in bytes of a segment selector | |
456 | on the target system. */ | |
457 | unsigned char segment_collector_size; | |
458 | ||
459 | /* A 4-byte count of the number of offsets that follow the header. */ | |
460 | unsigned int offset_entry_count; | |
461 | }; | |
462 | ||
094b34ac DE |
463 | /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list. |
464 | This includes type_unit_group and quick_file_names. */ | |
465 | ||
466 | struct stmt_list_hash | |
467 | { | |
468 | /* The DWO unit this table is from or NULL if there is none. */ | |
469 | struct dwo_unit *dwo_unit; | |
470 | ||
471 | /* Offset in .debug_line or .debug_line.dwo. */ | |
9c541725 | 472 | sect_offset line_sect_off; |
094b34ac DE |
473 | }; |
474 | ||
5989a64e | 475 | /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to |
8adb8487 TT |
476 | an object of this type. This contains elements of type unit groups |
477 | that can be shared across objfiles. The non-shareable parts are in | |
478 | type_unit_group_unshareable. */ | |
f4dc4d17 | 479 | |
0d305d5c | 480 | struct type_unit_group : public dwarf2_per_cu_data |
f4dc4d17 | 481 | { |
0186c6a7 DE |
482 | /* The TUs that share this DW_AT_stmt_list entry. |
483 | This is added to while parsing type units to build partial symtabs, | |
484 | and is deleted afterwards and not used again. */ | |
0d305d5c | 485 | std::vector<signatured_type *> *tus = nullptr; |
f4dc4d17 | 486 | |
094b34ac | 487 | /* The data used to construct the hash key. */ |
0d305d5c | 488 | struct stmt_list_hash hash {}; |
f4dc4d17 DE |
489 | }; |
490 | ||
73869dc2 | 491 | /* These sections are what may appear in a (real or virtual) DWO file. */ |
3019eac3 DE |
492 | |
493 | struct dwo_sections | |
494 | { | |
495 | struct dwarf2_section_info abbrev; | |
3019eac3 DE |
496 | struct dwarf2_section_info line; |
497 | struct dwarf2_section_info loc; | |
43988095 | 498 | struct dwarf2_section_info loclists; |
09262596 DE |
499 | struct dwarf2_section_info macinfo; |
500 | struct dwarf2_section_info macro; | |
d0ce17d8 | 501 | struct dwarf2_section_info rnglists; |
3019eac3 DE |
502 | struct dwarf2_section_info str; |
503 | struct dwarf2_section_info str_offsets; | |
80626a55 DE |
504 | /* In the case of a virtual DWO file, these two are unused. */ |
505 | struct dwarf2_section_info info; | |
fd5866f6 | 506 | std::vector<dwarf2_section_info> types; |
3019eac3 DE |
507 | }; |
508 | ||
c88ee1f0 | 509 | /* CUs/TUs in DWP/DWO files. */ |
3019eac3 DE |
510 | |
511 | struct dwo_unit | |
512 | { | |
513 | /* Backlink to the containing struct dwo_file. */ | |
514 | struct dwo_file *dwo_file; | |
515 | ||
516 | /* The "id" that distinguishes this CU/TU. | |
517 | .debug_info calls this "dwo_id", .debug_types calls this "signature". | |
518 | Since signatures came first, we stick with it for consistency. */ | |
519 | ULONGEST signature; | |
520 | ||
521 | /* The section this CU/TU lives in, in the DWO file. */ | |
8a0459fd | 522 | struct dwarf2_section_info *section; |
3019eac3 | 523 | |
9c541725 PA |
524 | /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */ |
525 | sect_offset sect_off; | |
3019eac3 DE |
526 | unsigned int length; |
527 | ||
528 | /* For types, offset in the type's DIE of the type defined by this TU. */ | |
529 | cu_offset type_offset_in_tu; | |
530 | }; | |
531 | ||
73869dc2 DE |
532 | /* include/dwarf2.h defines the DWP section codes. |
533 | It defines a max value but it doesn't define a min value, which we | |
534 | use for error checking, so provide one. */ | |
535 | ||
536 | enum dwp_v2_section_ids | |
537 | { | |
538 | DW_SECT_MIN = 1 | |
539 | }; | |
540 | ||
80626a55 | 541 | /* Data for one DWO file. |
57d63ce2 DE |
542 | |
543 | This includes virtual DWO files (a virtual DWO file is a DWO file as it | |
544 | appears in a DWP file). DWP files don't really have DWO files per se - | |
545 | comdat folding of types "loses" the DWO file they came from, and from | |
546 | a high level view DWP files appear to contain a mass of random types. | |
547 | However, to maintain consistency with the non-DWP case we pretend DWP | |
548 | files contain virtual DWO files, and we assign each TU with one virtual | |
549 | DWO file (generally based on the line and abbrev section offsets - | |
550 | a heuristic that seems to work in practice). */ | |
3019eac3 DE |
551 | |
552 | struct dwo_file | |
553 | { | |
51ac9db5 SM |
554 | dwo_file () = default; |
555 | DISABLE_COPY_AND_ASSIGN (dwo_file); | |
556 | ||
18a8505e | 557 | /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. |
80626a55 DE |
558 | For virtual DWO files the name is constructed from the section offsets |
559 | of abbrev,line,loc,str_offsets so that we combine virtual DWO files | |
560 | from related CU+TUs. */ | |
51ac9db5 | 561 | const char *dwo_name = nullptr; |
0ac5b59e DE |
562 | |
563 | /* The DW_AT_comp_dir attribute. */ | |
51ac9db5 | 564 | const char *comp_dir = nullptr; |
3019eac3 | 565 | |
80626a55 DE |
566 | /* The bfd, when the file is open. Otherwise this is NULL. |
567 | This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */ | |
fb1eb2f9 | 568 | gdb_bfd_ref_ptr dbfd; |
3019eac3 | 569 | |
73869dc2 | 570 | /* The sections that make up this DWO file. |
d2854d8d | 571 | Remember that for virtual DWO files in DWP V2 or DWP V5, these are virtual |
73869dc2 | 572 | sections (for lack of a better name). */ |
51ac9db5 | 573 | struct dwo_sections sections {}; |
3019eac3 | 574 | |
33c5cd75 DB |
575 | /* The CUs in the file. |
576 | Each element is a struct dwo_unit. Multiple CUs per DWO are supported as | |
577 | an extension to handle LLVM's Link Time Optimization output (where | |
578 | multiple source files may be compiled into a single object/dwo pair). */ | |
b0b6a987 | 579 | htab_up cus; |
3019eac3 DE |
580 | |
581 | /* Table of TUs in the file. | |
582 | Each element is a struct dwo_unit. */ | |
b0b6a987 | 583 | htab_up tus; |
3019eac3 DE |
584 | }; |
585 | ||
80626a55 DE |
586 | /* These sections are what may appear in a DWP file. */ |
587 | ||
588 | struct dwp_sections | |
589 | { | |
d2854d8d | 590 | /* These are used by all DWP versions (1, 2 and 5). */ |
80626a55 DE |
591 | struct dwarf2_section_info str; |
592 | struct dwarf2_section_info cu_index; | |
593 | struct dwarf2_section_info tu_index; | |
73869dc2 | 594 | |
d2854d8d | 595 | /* These are only used by DWP version 2 and version 5 files. |
73869dc2 DE |
596 | In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other |
597 | sections are referenced by section number, and are not recorded here. | |
d2854d8d CT |
598 | In DWP version 2 or 5 there is at most one copy of all these sections, |
599 | each section being (effectively) comprised of the concatenation of all of | |
600 | the individual sections that exist in the version 1 format. | |
73869dc2 DE |
601 | To keep the code simple we treat each of these concatenated pieces as a |
602 | section itself (a virtual section?). */ | |
603 | struct dwarf2_section_info abbrev; | |
604 | struct dwarf2_section_info info; | |
605 | struct dwarf2_section_info line; | |
606 | struct dwarf2_section_info loc; | |
d2854d8d | 607 | struct dwarf2_section_info loclists; |
73869dc2 DE |
608 | struct dwarf2_section_info macinfo; |
609 | struct dwarf2_section_info macro; | |
d2854d8d | 610 | struct dwarf2_section_info rnglists; |
73869dc2 DE |
611 | struct dwarf2_section_info str_offsets; |
612 | struct dwarf2_section_info types; | |
80626a55 DE |
613 | }; |
614 | ||
73869dc2 DE |
615 | /* These sections are what may appear in a virtual DWO file in DWP version 1. |
616 | A virtual DWO file is a DWO file as it appears in a DWP file. */ | |
80626a55 | 617 | |
73869dc2 | 618 | struct virtual_v1_dwo_sections |
80626a55 DE |
619 | { |
620 | struct dwarf2_section_info abbrev; | |
621 | struct dwarf2_section_info line; | |
622 | struct dwarf2_section_info loc; | |
623 | struct dwarf2_section_info macinfo; | |
624 | struct dwarf2_section_info macro; | |
625 | struct dwarf2_section_info str_offsets; | |
626 | /* Each DWP hash table entry records one CU or one TU. | |
8a0459fd | 627 | That is recorded here, and copied to dwo_unit.section. */ |
80626a55 DE |
628 | struct dwarf2_section_info info_or_types; |
629 | }; | |
630 | ||
d2854d8d | 631 | /* Similar to virtual_v1_dwo_sections, but for DWP version 2 or 5. |
73869dc2 DE |
632 | In version 2, the sections of the DWO files are concatenated together |
633 | and stored in one section of that name. Thus each ELF section contains | |
634 | several "virtual" sections. */ | |
635 | ||
d2854d8d | 636 | struct virtual_v2_or_v5_dwo_sections |
73869dc2 DE |
637 | { |
638 | bfd_size_type abbrev_offset; | |
639 | bfd_size_type abbrev_size; | |
640 | ||
641 | bfd_size_type line_offset; | |
642 | bfd_size_type line_size; | |
643 | ||
644 | bfd_size_type loc_offset; | |
645 | bfd_size_type loc_size; | |
646 | ||
d2854d8d CT |
647 | bfd_size_type loclists_offset; |
648 | bfd_size_type loclists_size; | |
649 | ||
73869dc2 DE |
650 | bfd_size_type macinfo_offset; |
651 | bfd_size_type macinfo_size; | |
652 | ||
653 | bfd_size_type macro_offset; | |
654 | bfd_size_type macro_size; | |
655 | ||
d2854d8d CT |
656 | bfd_size_type rnglists_offset; |
657 | bfd_size_type rnglists_size; | |
658 | ||
73869dc2 DE |
659 | bfd_size_type str_offsets_offset; |
660 | bfd_size_type str_offsets_size; | |
661 | ||
662 | /* Each DWP hash table entry records one CU or one TU. | |
663 | That is recorded here, and copied to dwo_unit.section. */ | |
664 | bfd_size_type info_or_types_offset; | |
665 | bfd_size_type info_or_types_size; | |
666 | }; | |
667 | ||
80626a55 DE |
668 | /* Contents of DWP hash tables. */ |
669 | ||
670 | struct dwp_hash_table | |
671 | { | |
73869dc2 | 672 | uint32_t version, nr_columns; |
80626a55 | 673 | uint32_t nr_units, nr_slots; |
73869dc2 DE |
674 | const gdb_byte *hash_table, *unit_table; |
675 | union | |
676 | { | |
677 | struct | |
678 | { | |
679 | const gdb_byte *indices; | |
680 | } v1; | |
681 | struct | |
682 | { | |
683 | /* This is indexed by column number and gives the id of the section | |
684 | in that column. */ | |
685 | #define MAX_NR_V2_DWO_SECTIONS \ | |
686 | (1 /* .debug_info or .debug_types */ \ | |
687 | + 1 /* .debug_abbrev */ \ | |
688 | + 1 /* .debug_line */ \ | |
689 | + 1 /* .debug_loc */ \ | |
690 | + 1 /* .debug_str_offsets */ \ | |
691 | + 1 /* .debug_macro or .debug_macinfo */) | |
692 | int section_ids[MAX_NR_V2_DWO_SECTIONS]; | |
693 | const gdb_byte *offsets; | |
694 | const gdb_byte *sizes; | |
695 | } v2; | |
d2854d8d CT |
696 | struct |
697 | { | |
698 | /* This is indexed by column number and gives the id of the section | |
699 | in that column. */ | |
700 | #define MAX_NR_V5_DWO_SECTIONS \ | |
701 | (1 /* .debug_info */ \ | |
702 | + 1 /* .debug_abbrev */ \ | |
703 | + 1 /* .debug_line */ \ | |
704 | + 1 /* .debug_loclists */ \ | |
705 | + 1 /* .debug_str_offsets */ \ | |
706 | + 1 /* .debug_macro */ \ | |
707 | + 1 /* .debug_rnglists */) | |
708 | int section_ids[MAX_NR_V5_DWO_SECTIONS]; | |
709 | const gdb_byte *offsets; | |
710 | const gdb_byte *sizes; | |
711 | } v5; | |
73869dc2 | 712 | } section_pool; |
80626a55 DE |
713 | }; |
714 | ||
715 | /* Data for one DWP file. */ | |
716 | ||
717 | struct dwp_file | |
718 | { | |
400174b1 TT |
719 | dwp_file (const char *name_, gdb_bfd_ref_ptr &&abfd) |
720 | : name (name_), | |
721 | dbfd (std::move (abfd)) | |
722 | { | |
723 | } | |
724 | ||
80626a55 DE |
725 | /* Name of the file. */ |
726 | const char *name; | |
727 | ||
73869dc2 | 728 | /* File format version. */ |
400174b1 | 729 | int version = 0; |
73869dc2 | 730 | |
93417882 | 731 | /* The bfd. */ |
400174b1 | 732 | gdb_bfd_ref_ptr dbfd; |
80626a55 DE |
733 | |
734 | /* Section info for this file. */ | |
400174b1 | 735 | struct dwp_sections sections {}; |
80626a55 | 736 | |
57d63ce2 | 737 | /* Table of CUs in the file. */ |
400174b1 | 738 | const struct dwp_hash_table *cus = nullptr; |
80626a55 DE |
739 | |
740 | /* Table of TUs in the file. */ | |
400174b1 | 741 | const struct dwp_hash_table *tus = nullptr; |
80626a55 | 742 | |
19ac8c2e | 743 | /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */ |
48b490f2 TT |
744 | htab_up loaded_cus; |
745 | htab_up loaded_tus; | |
80626a55 | 746 | |
73869dc2 DE |
747 | /* Table to map ELF section numbers to their sections. |
748 | This is only needed for the DWP V1 file format. */ | |
400174b1 TT |
749 | unsigned int num_sections = 0; |
750 | asection **elf_sections = nullptr; | |
80626a55 DE |
751 | }; |
752 | ||
0963b4bd MS |
753 | /* Struct used to pass misc. parameters to read_die_and_children, et |
754 | al. which are used for both .debug_info and .debug_types dies. | |
755 | All parameters here are unchanging for the life of the call. This | |
dee91e82 | 756 | struct exists to abstract away the constant parameters of die reading. */ |
93311388 DE |
757 | |
758 | struct die_reader_specs | |
759 | { | |
a32a8923 | 760 | /* The bfd of die_section. */ |
0280fdcc | 761 | bfd *abfd; |
93311388 DE |
762 | |
763 | /* The CU of the DIE we are parsing. */ | |
764 | struct dwarf2_cu *cu; | |
765 | ||
80626a55 | 766 | /* Non-NULL if reading a DWO file (including one packaged into a DWP). */ |
3019eac3 DE |
767 | struct dwo_file *dwo_file; |
768 | ||
dee91e82 | 769 | /* The section the die comes from. |
3019eac3 | 770 | This is either .debug_info or .debug_types, or the .dwo variants. */ |
dee91e82 DE |
771 | struct dwarf2_section_info *die_section; |
772 | ||
773 | /* die_section->buffer. */ | |
d521ce57 | 774 | const gdb_byte *buffer; |
f664829e DE |
775 | |
776 | /* The end of the buffer. */ | |
777 | const gdb_byte *buffer_end; | |
a2ce51a0 | 778 | |
685af9cd TT |
779 | /* The abbreviation table to use when reading the DIEs. */ |
780 | struct abbrev_table *abbrev_table; | |
93311388 DE |
781 | }; |
782 | ||
c0ab21c2 TT |
783 | /* A subclass of die_reader_specs that holds storage and has complex |
784 | constructor and destructor behavior. */ | |
785 | ||
786 | class cutu_reader : public die_reader_specs | |
787 | { | |
788 | public: | |
789 | ||
ab432490 SM |
790 | cutu_reader (dwarf2_per_cu_data *this_cu, |
791 | dwarf2_per_objfile *per_objfile, | |
c0ab21c2 | 792 | struct abbrev_table *abbrev_table, |
2e671100 | 793 | dwarf2_cu *existing_cu, |
c0ab21c2 TT |
794 | bool skip_partial); |
795 | ||
796 | explicit cutu_reader (struct dwarf2_per_cu_data *this_cu, | |
ab432490 | 797 | dwarf2_per_objfile *per_objfile, |
c0ab21c2 TT |
798 | struct dwarf2_cu *parent_cu = nullptr, |
799 | struct dwo_file *dwo_file = nullptr); | |
800 | ||
c0ab21c2 TT |
801 | DISABLE_COPY_AND_ASSIGN (cutu_reader); |
802 | ||
803 | const gdb_byte *info_ptr = nullptr; | |
804 | struct die_info *comp_unit_die = nullptr; | |
c0ab21c2 TT |
805 | bool dummy_p = false; |
806 | ||
6751ebae TT |
807 | /* Release the new CU, putting it on the chain. This cannot be done |
808 | for dummy CUs. */ | |
809 | void keep (); | |
810 | ||
c0ab21c2 | 811 | private: |
9e021579 SM |
812 | void init_tu_and_read_dwo_dies (dwarf2_per_cu_data *this_cu, |
813 | dwarf2_per_objfile *per_objfile, | |
2e671100 | 814 | dwarf2_cu *existing_cu); |
c0ab21c2 TT |
815 | |
816 | struct dwarf2_per_cu_data *m_this_cu; | |
c0ab21c2 TT |
817 | std::unique_ptr<dwarf2_cu> m_new_cu; |
818 | ||
819 | /* The ordinary abbreviation table. */ | |
820 | abbrev_table_up m_abbrev_table_holder; | |
821 | ||
822 | /* The DWO abbreviation table. */ | |
823 | abbrev_table_up m_dwo_abbrev_table; | |
824 | }; | |
dee91e82 | 825 | |
c906108c | 826 | /* When we construct a partial symbol table entry we only |
0963b4bd | 827 | need this much information. */ |
6f06d47b | 828 | struct partial_die_info : public allocate_on_obstack |
c906108c | 829 | { |
7c32eebb | 830 | partial_die_info (sect_offset sect_off, const struct abbrev_info *abbrev); |
6f06d47b YQ |
831 | |
832 | /* Disable assign but still keep copy ctor, which is needed | |
833 | load_partial_dies. */ | |
834 | partial_die_info& operator=(const partial_die_info& rhs) = delete; | |
835 | ||
52356b79 YQ |
836 | /* Adjust the partial die before generating a symbol for it. This |
837 | function may set the is_external flag or change the DIE's | |
838 | name. */ | |
839 | void fixup (struct dwarf2_cu *cu); | |
840 | ||
48fbe735 YQ |
841 | /* Read a minimal amount of information into the minimal die |
842 | structure. */ | |
843 | const gdb_byte *read (const struct die_reader_specs *reader, | |
844 | const struct abbrev_info &abbrev, | |
845 | const gdb_byte *info_ptr); | |
846 | ||
7d00ffec TT |
847 | /* Compute the name of this partial DIE. This memoizes the |
848 | result, so it is safe to call multiple times. */ | |
849 | const char *name (dwarf2_cu *cu); | |
850 | ||
72bf9492 | 851 | /* Offset of this DIE. */ |
6f06d47b | 852 | const sect_offset sect_off; |
72bf9492 DJ |
853 | |
854 | /* DWARF-2 tag for this DIE. */ | |
6f06d47b | 855 | const ENUM_BITFIELD(dwarf_tag) tag : 16; |
72bf9492 | 856 | |
72bf9492 | 857 | /* Assorted flags describing the data found in this DIE. */ |
6f06d47b YQ |
858 | const unsigned int has_children : 1; |
859 | ||
72bf9492 DJ |
860 | unsigned int is_external : 1; |
861 | unsigned int is_declaration : 1; | |
862 | unsigned int has_type : 1; | |
863 | unsigned int has_specification : 1; | |
864 | unsigned int has_pc_info : 1; | |
481860b3 | 865 | unsigned int may_be_inlined : 1; |
72bf9492 | 866 | |
0c1b455e TT |
867 | /* This DIE has been marked DW_AT_main_subprogram. */ |
868 | unsigned int main_subprogram : 1; | |
869 | ||
72bf9492 DJ |
870 | /* Flag set if the SCOPE field of this structure has been |
871 | computed. */ | |
872 | unsigned int scope_set : 1; | |
873 | ||
fa4028e9 JB |
874 | /* Flag set if the DIE has a byte_size attribute. */ |
875 | unsigned int has_byte_size : 1; | |
876 | ||
ff908ebf AW |
877 | /* Flag set if the DIE has a DW_AT_const_value attribute. */ |
878 | unsigned int has_const_value : 1; | |
879 | ||
98bfdba5 PA |
880 | /* Flag set if any of the DIE's children are template arguments. */ |
881 | unsigned int has_template_arguments : 1; | |
882 | ||
52356b79 | 883 | /* Flag set if fixup has been called on this die. */ |
abc72ce4 DE |
884 | unsigned int fixup_called : 1; |
885 | ||
36586728 TT |
886 | /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */ |
887 | unsigned int is_dwz : 1; | |
888 | ||
889 | /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */ | |
890 | unsigned int spec_is_dwz : 1; | |
891 | ||
7d00ffec TT |
892 | unsigned int canonical_name : 1; |
893 | ||
72bf9492 | 894 | /* The name of this DIE. Normally the value of DW_AT_name, but |
94af9270 | 895 | sometimes a default name for unnamed DIEs. */ |
7d00ffec | 896 | const char *raw_name = nullptr; |
72bf9492 | 897 | |
abc72ce4 | 898 | /* The linkage name, if present. */ |
6f06d47b | 899 | const char *linkage_name = nullptr; |
abc72ce4 | 900 | |
72bf9492 DJ |
901 | /* The scope to prepend to our children. This is generally |
902 | allocated on the comp_unit_obstack, so will disappear | |
903 | when this compilation unit leaves the cache. */ | |
6f06d47b | 904 | const char *scope = nullptr; |
72bf9492 | 905 | |
95554aad TT |
906 | /* Some data associated with the partial DIE. The tag determines |
907 | which field is live. */ | |
908 | union | |
909 | { | |
910 | /* The location description associated with this DIE, if any. */ | |
911 | struct dwarf_block *locdesc; | |
912 | /* The offset of an import, for DW_TAG_imported_unit. */ | |
9c541725 | 913 | sect_offset sect_off; |
6f06d47b | 914 | } d {}; |
72bf9492 DJ |
915 | |
916 | /* If HAS_PC_INFO, the PC range associated with this DIE. */ | |
6f06d47b YQ |
917 | CORE_ADDR lowpc = 0; |
918 | CORE_ADDR highpc = 0; | |
72bf9492 | 919 | |
93311388 | 920 | /* Pointer into the info_buffer (or types_buffer) pointing at the target of |
72bf9492 | 921 | DW_AT_sibling, if any. */ |
48fbe735 YQ |
922 | /* NOTE: This member isn't strictly necessary, partial_die_info::read |
923 | could return DW_AT_sibling values to its caller load_partial_dies. */ | |
6f06d47b | 924 | const gdb_byte *sibling = nullptr; |
72bf9492 DJ |
925 | |
926 | /* If HAS_SPECIFICATION, the offset of the DIE referred to by | |
927 | DW_AT_specification (or DW_AT_abstract_origin or | |
928 | DW_AT_extension). */ | |
6f06d47b | 929 | sect_offset spec_offset {}; |
72bf9492 DJ |
930 | |
931 | /* Pointers to this DIE's parent, first child, and next sibling, | |
932 | if any. */ | |
6f06d47b YQ |
933 | struct partial_die_info *die_parent = nullptr; |
934 | struct partial_die_info *die_child = nullptr; | |
935 | struct partial_die_info *die_sibling = nullptr; | |
936 | ||
937 | friend struct partial_die_info * | |
938 | dwarf2_cu::find_partial_die (sect_offset sect_off); | |
939 | ||
940 | private: | |
941 | /* Only need to do look up in dwarf2_cu::find_partial_die. */ | |
942 | partial_die_info (sect_offset sect_off) | |
943 | : partial_die_info (sect_off, DW_TAG_padding, 0) | |
944 | { | |
945 | } | |
946 | ||
947 | partial_die_info (sect_offset sect_off_, enum dwarf_tag tag_, | |
948 | int has_children_) | |
949 | : sect_off (sect_off_), tag (tag_), has_children (has_children_) | |
950 | { | |
951 | is_external = 0; | |
952 | is_declaration = 0; | |
953 | has_type = 0; | |
954 | has_specification = 0; | |
955 | has_pc_info = 0; | |
956 | may_be_inlined = 0; | |
957 | main_subprogram = 0; | |
958 | scope_set = 0; | |
959 | has_byte_size = 0; | |
960 | has_const_value = 0; | |
961 | has_template_arguments = 0; | |
962 | fixup_called = 0; | |
963 | is_dwz = 0; | |
964 | spec_is_dwz = 0; | |
7d00ffec | 965 | canonical_name = 0; |
6f06d47b | 966 | } |
c906108c SS |
967 | }; |
968 | ||
c906108c SS |
969 | /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte, |
970 | but this would require a corresponding change in unpack_field_as_long | |
971 | and friends. */ | |
972 | static int bits_per_byte = 8; | |
973 | ||
9c6a1327 TT |
974 | struct variant_part_builder; |
975 | ||
976 | /* When reading a variant, we track a bit more information about the | |
977 | field, and store it in an object of this type. */ | |
2ddeaf8a TT |
978 | |
979 | struct variant_field | |
980 | { | |
9c6a1327 TT |
981 | int first_field = -1; |
982 | int last_field = -1; | |
983 | ||
984 | /* A variant can contain other variant parts. */ | |
985 | std::vector<variant_part_builder> variant_parts; | |
986 | ||
2ddeaf8a TT |
987 | /* If we see a DW_TAG_variant, then this will be set if this is the |
988 | default branch. */ | |
9c6a1327 TT |
989 | bool default_branch = false; |
990 | /* If we see a DW_AT_discr_value, then this will be the discriminant | |
991 | value. */ | |
992 | ULONGEST discriminant_value = 0; | |
993 | /* If we see a DW_AT_discr_list, then this is a pointer to the list | |
994 | data. */ | |
995 | struct dwarf_block *discr_list_data = nullptr; | |
996 | }; | |
997 | ||
998 | /* This represents a DW_TAG_variant_part. */ | |
999 | ||
1000 | struct variant_part_builder | |
1001 | { | |
1002 | /* The offset of the discriminant field. */ | |
1003 | sect_offset discriminant_offset {}; | |
1004 | ||
1005 | /* Variants that are direct children of this variant part. */ | |
1006 | std::vector<variant_field> variants; | |
1007 | ||
1008 | /* True if we're currently reading a variant. */ | |
1009 | bool processing_variant = false; | |
2ddeaf8a TT |
1010 | }; |
1011 | ||
52059ffd TT |
1012 | struct nextfield |
1013 | { | |
be2daae6 TT |
1014 | int accessibility = 0; |
1015 | int virtuality = 0; | |
9c6a1327 TT |
1016 | /* Variant parts need to find the discriminant, which is a DIE |
1017 | reference. We track the section offset of each field to make | |
1018 | this link. */ | |
1019 | sect_offset offset; | |
be2daae6 | 1020 | struct field field {}; |
52059ffd TT |
1021 | }; |
1022 | ||
1023 | struct fnfieldlist | |
1024 | { | |
be2daae6 TT |
1025 | const char *name = nullptr; |
1026 | std::vector<struct fn_field> fnfields; | |
52059ffd TT |
1027 | }; |
1028 | ||
c906108c SS |
1029 | /* The routines that read and process dies for a C struct or C++ class |
1030 | pass lists of data member fields and lists of member function fields | |
1031 | in an instance of a field_info structure, as defined below. */ | |
1032 | struct field_info | |
2de01bdb SM |
1033 | { |
1034 | /* List of data member and baseclasses fields. */ | |
1035 | std::vector<struct nextfield> fields; | |
1036 | std::vector<struct nextfield> baseclasses; | |
1037 | ||
1038 | /* Set if the accessibility of one of the fields is not public. */ | |
264fc0e2 | 1039 | bool non_public_fields = false; |
2de01bdb SM |
1040 | |
1041 | /* Member function fieldlist array, contains name of possibly overloaded | |
1042 | member function, number of overloaded member functions and a pointer | |
1043 | to the head of the member function field chain. */ | |
1044 | std::vector<struct fnfieldlist> fnfieldlists; | |
1045 | ||
1046 | /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of | |
1047 | a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */ | |
1048 | std::vector<struct decl_field> typedef_field_list; | |
1049 | ||
1050 | /* Nested types defined by this class and the number of elements in this | |
1051 | list. */ | |
1052 | std::vector<struct decl_field> nested_types_list; | |
1053 | ||
1054 | /* If non-null, this is the variant part we are currently | |
1055 | reading. */ | |
1056 | variant_part_builder *current_variant_part = nullptr; | |
1057 | /* This holds all the top-level variant parts attached to the type | |
1058 | we're reading. */ | |
1059 | std::vector<variant_part_builder> variant_parts; | |
1060 | ||
1061 | /* Return the total number of fields (including baseclasses). */ | |
1062 | int nfields () const | |
c5aa993b | 1063 | { |
2de01bdb SM |
1064 | return fields.size () + baseclasses.size (); |
1065 | } | |
1066 | }; | |
c906108c | 1067 | |
ae038cb0 DJ |
1068 | /* Loaded secondary compilation units are kept in memory until they |
1069 | have not been referenced for the processing of this many | |
1070 | compilation units. Set this to zero to disable caching. Cache | |
1071 | sizes of up to at least twenty will improve startup time for | |
1072 | typical inter-CU-reference binaries, at an obvious memory cost. */ | |
b4f54984 | 1073 | static int dwarf_max_cache_age = 5; |
920d2a44 | 1074 | static void |
b4f54984 DE |
1075 | show_dwarf_max_cache_age (struct ui_file *file, int from_tty, |
1076 | struct cmd_list_element *c, const char *value) | |
920d2a44 | 1077 | { |
3e43a32a | 1078 | fprintf_filtered (file, _("The upper bound on the age of cached " |
b4f54984 | 1079 | "DWARF compilation units is %s.\n"), |
920d2a44 AC |
1080 | value); |
1081 | } | |
4390d890 | 1082 | \f |
c906108c SS |
1083 | /* local function prototypes */ |
1084 | ||
918dd910 JK |
1085 | static void dwarf2_find_base_address (struct die_info *die, |
1086 | struct dwarf2_cu *cu); | |
1087 | ||
891813be | 1088 | static dwarf2_psymtab *create_partial_symtab |
7aa104c4 SM |
1089 | (dwarf2_per_cu_data *per_cu, dwarf2_per_objfile *per_objfile, |
1090 | const char *name); | |
0018ea6f | 1091 | |
f1902523 JK |
1092 | static void build_type_psymtabs_reader (const struct die_reader_specs *reader, |
1093 | const gdb_byte *info_ptr, | |
3e225074 | 1094 | struct die_info *type_unit_die); |
f1902523 | 1095 | |
976ca316 | 1096 | static void dwarf2_build_psymtabs_hard (dwarf2_per_objfile *per_objfile); |
c906108c | 1097 | |
72bf9492 DJ |
1098 | static void scan_partial_symbols (struct partial_die_info *, |
1099 | CORE_ADDR *, CORE_ADDR *, | |
5734ee8b | 1100 | int, struct dwarf2_cu *); |
c906108c | 1101 | |
72bf9492 DJ |
1102 | static void add_partial_symbol (struct partial_die_info *, |
1103 | struct dwarf2_cu *); | |
63d06c5c | 1104 | |
72bf9492 DJ |
1105 | static void add_partial_namespace (struct partial_die_info *pdi, |
1106 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 1107 | int set_addrmap, struct dwarf2_cu *cu); |
63d06c5c | 1108 | |
5d7cb8df | 1109 | static void add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, |
cdc07690 | 1110 | CORE_ADDR *highpc, int set_addrmap, |
5d7cb8df JK |
1111 | struct dwarf2_cu *cu); |
1112 | ||
72bf9492 DJ |
1113 | static void add_partial_enumeration (struct partial_die_info *enum_pdi, |
1114 | struct dwarf2_cu *cu); | |
91c24f0a | 1115 | |
bc30ff58 JB |
1116 | static void add_partial_subprogram (struct partial_die_info *pdi, |
1117 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
5734ee8b | 1118 | int need_pc, struct dwarf2_cu *cu); |
bc30ff58 | 1119 | |
d521ce57 | 1120 | static unsigned int peek_abbrev_code (bfd *, const gdb_byte *); |
6caca83c | 1121 | |
dee91e82 | 1122 | static struct partial_die_info *load_partial_dies |
d521ce57 | 1123 | (const struct die_reader_specs *, const gdb_byte *, int); |
72bf9492 | 1124 | |
fb816e8b TV |
1125 | /* A pair of partial_die_info and compilation unit. */ |
1126 | struct cu_partial_die_info | |
1127 | { | |
1128 | /* The compilation unit of the partial_die_info. */ | |
1129 | struct dwarf2_cu *cu; | |
1130 | /* A partial_die_info. */ | |
1131 | struct partial_die_info *pdi; | |
122cf0f2 AB |
1132 | |
1133 | cu_partial_die_info (struct dwarf2_cu *cu, struct partial_die_info *pdi) | |
1134 | : cu (cu), | |
1135 | pdi (pdi) | |
405feb71 | 1136 | { /* Nothing. */ } |
122cf0f2 AB |
1137 | |
1138 | private: | |
1139 | cu_partial_die_info () = delete; | |
fb816e8b TV |
1140 | }; |
1141 | ||
122cf0f2 AB |
1142 | static const struct cu_partial_die_info find_partial_die (sect_offset, int, |
1143 | struct dwarf2_cu *); | |
72bf9492 | 1144 | |
d521ce57 | 1145 | static const gdb_byte *read_attribute (const struct die_reader_specs *, |
4444f407 TT |
1146 | struct attribute *, |
1147 | const struct attr_abbrev *, | |
7a5f294d | 1148 | const gdb_byte *); |
18a8505e AT |
1149 | |
1150 | static void read_attribute_reprocess (const struct die_reader_specs *reader, | |
d0ce17d8 | 1151 | struct attribute *attr, dwarf_tag tag); |
18a8505e AT |
1152 | |
1153 | static CORE_ADDR read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index); | |
a8329558 | 1154 | |
976ca316 SM |
1155 | static sect_offset read_abbrev_offset (dwarf2_per_objfile *per_objfile, |
1156 | dwarf2_section_info *, sect_offset); | |
f4dc4d17 | 1157 | |
ed2dc618 | 1158 | static const char *read_indirect_string |
976ca316 | 1159 | (dwarf2_per_objfile *per_objfile, bfd *, const gdb_byte *, |
ed2dc618 | 1160 | const struct comp_unit_head *, unsigned int *); |
4bdf3d34 | 1161 | |
ed2dc618 | 1162 | static const char *read_indirect_string_at_offset |
976ca316 | 1163 | (dwarf2_per_objfile *per_objfile, LONGEST str_offset); |
927aa2e7 | 1164 | |
d521ce57 TT |
1165 | static CORE_ADDR read_addr_index_from_leb128 (struct dwarf2_cu *, |
1166 | const gdb_byte *, | |
3019eac3 DE |
1167 | unsigned int *); |
1168 | ||
18a8505e AT |
1169 | static const char *read_dwo_str_index (const struct die_reader_specs *reader, |
1170 | ULONGEST str_index); | |
1171 | ||
1172 | static const char *read_stub_str_index (struct dwarf2_cu *cu, | |
1173 | ULONGEST str_index); | |
3019eac3 | 1174 | |
e142c38c | 1175 | static void set_cu_language (unsigned int, struct dwarf2_cu *); |
c906108c | 1176 | |
e142c38c DJ |
1177 | static struct attribute *dwarf2_attr (struct die_info *, unsigned int, |
1178 | struct dwarf2_cu *); | |
c906108c | 1179 | |
7d45c7c3 | 1180 | static const char *dwarf2_string_attr (struct die_info *die, unsigned int name, |
dda83cd7 | 1181 | struct dwarf2_cu *cu); |
7d45c7c3 | 1182 | |
a084a2a6 AT |
1183 | static const char *dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu); |
1184 | ||
05cf31d1 | 1185 | static int dwarf2_flag_true_p (struct die_info *die, unsigned name, |
dda83cd7 | 1186 | struct dwarf2_cu *cu); |
05cf31d1 | 1187 | |
e142c38c | 1188 | static int die_is_declaration (struct die_info *, struct dwarf2_cu *cu); |
3ca72b44 | 1189 | |
e142c38c | 1190 | static struct die_info *die_specification (struct die_info *die, |
f2f0e013 | 1191 | struct dwarf2_cu **); |
63d06c5c | 1192 | |
9c541725 | 1193 | static line_header_up dwarf_decode_line_header (sect_offset sect_off, |
fff8551c | 1194 | struct dwarf2_cu *cu); |
debd256d | 1195 | |
f3f5162e | 1196 | static void dwarf_decode_lines (struct line_header *, const char *, |
891813be | 1197 | struct dwarf2_cu *, dwarf2_psymtab *, |
527f3840 | 1198 | CORE_ADDR, int decode_mapping); |
c906108c | 1199 | |
804d2729 TT |
1200 | static void dwarf2_start_subfile (struct dwarf2_cu *, const char *, |
1201 | const char *); | |
c906108c | 1202 | |
a14ed312 | 1203 | static struct symbol *new_symbol (struct die_info *, struct type *, |
5e2db402 | 1204 | struct dwarf2_cu *, struct symbol * = NULL); |
34eaf542 | 1205 | |
ff39bb5e | 1206 | static void dwarf2_const_value (const struct attribute *, struct symbol *, |
e7c27a73 | 1207 | struct dwarf2_cu *); |
c906108c | 1208 | |
ff39bb5e | 1209 | static void dwarf2_const_value_attr (const struct attribute *attr, |
98bfdba5 PA |
1210 | struct type *type, |
1211 | const char *name, | |
1212 | struct obstack *obstack, | |
12df843f | 1213 | struct dwarf2_cu *cu, LONGEST *value, |
d521ce57 | 1214 | const gdb_byte **bytes, |
98bfdba5 | 1215 | struct dwarf2_locexpr_baton **baton); |
2df3850c | 1216 | |
57567375 TT |
1217 | static struct type *read_subrange_index_type (struct die_info *die, |
1218 | struct dwarf2_cu *cu); | |
1219 | ||
e7c27a73 | 1220 | static struct type *die_type (struct die_info *, struct dwarf2_cu *); |
c906108c | 1221 | |
b4ba55a1 JB |
1222 | static int need_gnat_info (struct dwarf2_cu *); |
1223 | ||
3e43a32a MS |
1224 | static struct type *die_descriptive_type (struct die_info *, |
1225 | struct dwarf2_cu *); | |
b4ba55a1 JB |
1226 | |
1227 | static void set_descriptive_type (struct type *, struct die_info *, | |
1228 | struct dwarf2_cu *); | |
1229 | ||
e7c27a73 DJ |
1230 | static struct type *die_containing_type (struct die_info *, |
1231 | struct dwarf2_cu *); | |
c906108c | 1232 | |
ff39bb5e | 1233 | static struct type *lookup_die_type (struct die_info *, const struct attribute *, |
673bfd45 | 1234 | struct dwarf2_cu *); |
c906108c | 1235 | |
f792889a | 1236 | static struct type *read_type_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1237 | |
673bfd45 DE |
1238 | static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *); |
1239 | ||
0d5cff50 | 1240 | static const char *determine_prefix (struct die_info *die, struct dwarf2_cu *); |
63d06c5c | 1241 | |
6e70227d | 1242 | static char *typename_concat (struct obstack *obs, const char *prefix, |
f55ee35c JK |
1243 | const char *suffix, int physname, |
1244 | struct dwarf2_cu *cu); | |
63d06c5c | 1245 | |
e7c27a73 | 1246 | static void read_file_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1247 | |
348e048f DE |
1248 | static void read_type_unit_scope (struct die_info *, struct dwarf2_cu *); |
1249 | ||
e7c27a73 | 1250 | static void read_func_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1251 | |
e7c27a73 | 1252 | static void read_lexical_block_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1253 | |
96408a79 SA |
1254 | static void read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu); |
1255 | ||
71a3c369 TT |
1256 | static void read_variable (struct die_info *die, struct dwarf2_cu *cu); |
1257 | ||
41144253 | 1258 | /* Return the .debug_loclists section to use for cu. */ |
1259 | static struct dwarf2_section_info *cu_debug_loc_section (struct dwarf2_cu *cu); | |
1260 | ||
d0ce17d8 CT |
1261 | /* Return the .debug_rnglists section to use for cu. */ |
1262 | static struct dwarf2_section_info *cu_debug_rnglists_section | |
1263 | (struct dwarf2_cu *cu, dwarf_tag tag); | |
1264 | ||
3a2b436a | 1265 | /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return |
e385593e | 1266 | values. Keep the items ordered with increasing constraints compliance. */ |
3a2b436a JK |
1267 | enum pc_bounds_kind |
1268 | { | |
e385593e | 1269 | /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */ |
3a2b436a JK |
1270 | PC_BOUNDS_NOT_PRESENT, |
1271 | ||
e385593e JK |
1272 | /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges |
1273 | were present but they do not form a valid range of PC addresses. */ | |
1274 | PC_BOUNDS_INVALID, | |
1275 | ||
3a2b436a JK |
1276 | /* Discontiguous range was found - that is DW_AT_ranges was found. */ |
1277 | PC_BOUNDS_RANGES, | |
1278 | ||
1279 | /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */ | |
1280 | PC_BOUNDS_HIGH_LOW, | |
1281 | }; | |
1282 | ||
1283 | static enum pc_bounds_kind dwarf2_get_pc_bounds (struct die_info *, | |
1284 | CORE_ADDR *, CORE_ADDR *, | |
1285 | struct dwarf2_cu *, | |
891813be | 1286 | dwarf2_psymtab *); |
c906108c | 1287 | |
fae299cd DC |
1288 | static void get_scope_pc_bounds (struct die_info *, |
1289 | CORE_ADDR *, CORE_ADDR *, | |
1290 | struct dwarf2_cu *); | |
1291 | ||
801e3a5b | 1292 | static void dwarf2_record_block_ranges (struct die_info *, struct block *, |
dda83cd7 | 1293 | CORE_ADDR, struct dwarf2_cu *); |
801e3a5b | 1294 | |
a14ed312 | 1295 | static void dwarf2_add_field (struct field_info *, struct die_info *, |
e7c27a73 | 1296 | struct dwarf2_cu *); |
c906108c | 1297 | |
a14ed312 | 1298 | static void dwarf2_attach_fields_to_type (struct field_info *, |
e7c27a73 | 1299 | struct type *, struct dwarf2_cu *); |
c906108c | 1300 | |
a14ed312 | 1301 | static void dwarf2_add_member_fn (struct field_info *, |
e26fb1d7 | 1302 | struct die_info *, struct type *, |
e7c27a73 | 1303 | struct dwarf2_cu *); |
c906108c | 1304 | |
a14ed312 | 1305 | static void dwarf2_attach_fn_fields_to_type (struct field_info *, |
3e43a32a MS |
1306 | struct type *, |
1307 | struct dwarf2_cu *); | |
c906108c | 1308 | |
134d01f1 | 1309 | static void process_structure_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1310 | |
e7c27a73 | 1311 | static void read_common_block (struct die_info *, struct dwarf2_cu *); |
c906108c | 1312 | |
e7c27a73 | 1313 | static void read_namespace (struct die_info *die, struct dwarf2_cu *); |
d9fa45fe | 1314 | |
5d7cb8df JK |
1315 | static void read_module (struct die_info *die, struct dwarf2_cu *cu); |
1316 | ||
804d2729 | 1317 | static struct using_direct **using_directives (struct dwarf2_cu *cu); |
22cee43f | 1318 | |
27aa8d6a SW |
1319 | static void read_import_statement (struct die_info *die, struct dwarf2_cu *); |
1320 | ||
74921315 KS |
1321 | static int read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu); |
1322 | ||
f55ee35c JK |
1323 | static struct type *read_module_type (struct die_info *die, |
1324 | struct dwarf2_cu *cu); | |
1325 | ||
38d518c9 | 1326 | static const char *namespace_name (struct die_info *die, |
e142c38c | 1327 | int *is_anonymous, struct dwarf2_cu *); |
38d518c9 | 1328 | |
134d01f1 | 1329 | static void process_enumeration_scope (struct die_info *, struct dwarf2_cu *); |
c906108c | 1330 | |
7d79de9a TT |
1331 | static CORE_ADDR decode_locdesc (struct dwarf_block *, struct dwarf2_cu *, |
1332 | bool * = nullptr); | |
c906108c | 1333 | |
6e70227d | 1334 | static enum dwarf_array_dim_ordering read_array_order (struct die_info *, |
7ca2d3a3 DL |
1335 | struct dwarf2_cu *); |
1336 | ||
bf6af496 | 1337 | static struct die_info *read_die_and_siblings_1 |
d521ce57 | 1338 | (const struct die_reader_specs *, const gdb_byte *, const gdb_byte **, |
bf6af496 | 1339 | struct die_info *); |
639d11d3 | 1340 | |
dee91e82 | 1341 | static struct die_info *read_die_and_siblings (const struct die_reader_specs *, |
d521ce57 TT |
1342 | const gdb_byte *info_ptr, |
1343 | const gdb_byte **new_info_ptr, | |
639d11d3 DC |
1344 | struct die_info *parent); |
1345 | ||
d521ce57 TT |
1346 | static const gdb_byte *read_full_die_1 (const struct die_reader_specs *, |
1347 | struct die_info **, const gdb_byte *, | |
3e225074 | 1348 | int); |
3019eac3 | 1349 | |
d521ce57 | 1350 | static const gdb_byte *read_full_die (const struct die_reader_specs *, |
3e225074 | 1351 | struct die_info **, const gdb_byte *); |
93311388 | 1352 | |
e7c27a73 | 1353 | static void process_die (struct die_info *, struct dwarf2_cu *); |
c906108c | 1354 | |
15d034d0 | 1355 | static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu *, |
be1e3d3e | 1356 | struct objfile *); |
71c25dea | 1357 | |
15d034d0 | 1358 | static const char *dwarf2_name (struct die_info *die, struct dwarf2_cu *); |
9219021c | 1359 | |
15d034d0 | 1360 | static const char *dwarf2_full_name (const char *name, |
98bfdba5 PA |
1361 | struct die_info *die, |
1362 | struct dwarf2_cu *cu); | |
1363 | ||
ca69b9e6 DE |
1364 | static const char *dwarf2_physname (const char *name, struct die_info *die, |
1365 | struct dwarf2_cu *cu); | |
1366 | ||
e142c38c | 1367 | static struct die_info *dwarf2_extension (struct die_info *die, |
f2f0e013 | 1368 | struct dwarf2_cu **); |
9219021c | 1369 | |
d97bc12b DE |
1370 | static void dump_die_shallow (struct ui_file *, int indent, struct die_info *); |
1371 | ||
1372 | static void dump_die_for_error (struct die_info *); | |
1373 | ||
1374 | static void dump_die_1 (struct ui_file *, int level, int max_level, | |
1375 | struct die_info *); | |
c906108c | 1376 | |
d97bc12b | 1377 | /*static*/ void dump_die (struct die_info *, int max_level); |
c906108c | 1378 | |
51545339 | 1379 | static void store_in_ref_table (struct die_info *, |
10b3939b | 1380 | struct dwarf2_cu *); |
c906108c | 1381 | |
348e048f | 1382 | static struct die_info *follow_die_ref_or_sig (struct die_info *, |
ff39bb5e | 1383 | const struct attribute *, |
348e048f DE |
1384 | struct dwarf2_cu **); |
1385 | ||
10b3939b | 1386 | static struct die_info *follow_die_ref (struct die_info *, |
ff39bb5e | 1387 | const struct attribute *, |
f2f0e013 | 1388 | struct dwarf2_cu **); |
c906108c | 1389 | |
348e048f | 1390 | static struct die_info *follow_die_sig (struct die_info *, |
ff39bb5e | 1391 | const struct attribute *, |
348e048f DE |
1392 | struct dwarf2_cu **); |
1393 | ||
ac9ec31b DE |
1394 | static struct type *get_signatured_type (struct die_info *, ULONGEST, |
1395 | struct dwarf2_cu *); | |
1396 | ||
1397 | static struct type *get_DW_AT_signature_type (struct die_info *, | |
ff39bb5e | 1398 | const struct attribute *, |
ac9ec31b DE |
1399 | struct dwarf2_cu *); |
1400 | ||
ab432490 SM |
1401 | static void load_full_type_unit (dwarf2_per_cu_data *per_cu, |
1402 | dwarf2_per_objfile *per_objfile); | |
348e048f | 1403 | |
ab432490 SM |
1404 | static void read_signatured_type (signatured_type *sig_type, |
1405 | dwarf2_per_objfile *per_objfile); | |
348e048f | 1406 | |
63e43d3a PMR |
1407 | static int attr_to_dynamic_prop (const struct attribute *attr, |
1408 | struct die_info *die, struct dwarf2_cu *cu, | |
9a49df9d | 1409 | struct dynamic_prop *prop, struct type *type); |
63e43d3a | 1410 | |
c906108c SS |
1411 | /* memory allocation interface */ |
1412 | ||
7b5a2f43 | 1413 | static struct dwarf_block *dwarf_alloc_block (struct dwarf2_cu *); |
c906108c | 1414 | |
b60c80d6 | 1415 | static struct die_info *dwarf_alloc_die (struct dwarf2_cu *, int); |
c906108c | 1416 | |
43f3e411 | 1417 | static void dwarf_decode_macros (struct dwarf2_cu *, unsigned int, int); |
2e276125 | 1418 | |
8cf6f0b1 TT |
1419 | static void fill_in_loclist_baton (struct dwarf2_cu *cu, |
1420 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 1421 | const struct attribute *attr); |
8cf6f0b1 | 1422 | |
ff39bb5e | 1423 | static void dwarf2_symbol_mark_computed (const struct attribute *attr, |
93e7bd98 | 1424 | struct symbol *sym, |
f1e6e072 TT |
1425 | struct dwarf2_cu *cu, |
1426 | int is_block); | |
4c2df51b | 1427 | |
d521ce57 TT |
1428 | static const gdb_byte *skip_one_die (const struct die_reader_specs *reader, |
1429 | const gdb_byte *info_ptr, | |
7c32eebb | 1430 | const struct abbrev_info *abbrev); |
4bb7a0a7 | 1431 | |
72bf9492 DJ |
1432 | static hashval_t partial_die_hash (const void *item); |
1433 | ||
1434 | static int partial_die_eq (const void *item_lhs, const void *item_rhs); | |
1435 | ||
ae038cb0 | 1436 | static struct dwarf2_per_cu_data *dwarf2_find_containing_comp_unit |
ed2dc618 | 1437 | (sect_offset sect_off, unsigned int offset_in_dwz, |
976ca316 | 1438 | dwarf2_per_objfile *per_objfile); |
ae038cb0 | 1439 | |
9816fde3 | 1440 | static void prepare_one_comp_unit (struct dwarf2_cu *cu, |
95554aad TT |
1441 | struct die_info *comp_unit_die, |
1442 | enum language pretend_language); | |
93311388 | 1443 | |
f792889a | 1444 | static struct type *set_die_type (struct die_info *, struct type *, |
57567375 | 1445 | struct dwarf2_cu *, bool = false); |
1c379e20 | 1446 | |
976ca316 | 1447 | static void create_all_comp_units (dwarf2_per_objfile *per_objfile); |
ae038cb0 | 1448 | |
ab432490 SM |
1449 | static void load_full_comp_unit (dwarf2_per_cu_data *per_cu, |
1450 | dwarf2_per_objfile *per_objfile, | |
4a636814 | 1451 | dwarf2_cu *existing_cu, |
ab432490 SM |
1452 | bool skip_partial, |
1453 | enum language pretend_language); | |
10b3939b | 1454 | |
8fc0b21d | 1455 | static void process_full_comp_unit (dwarf2_cu *cu, |
47b14e86 | 1456 | enum language pretend_language); |
10b3939b | 1457 | |
8fc0b21d | 1458 | static void process_full_type_unit (dwarf2_cu *cu, |
47b14e86 | 1459 | enum language pretend_language); |
f4dc4d17 | 1460 | |
b64f50a1 | 1461 | static struct type *get_die_type_at_offset (sect_offset, |
aa66c379 SM |
1462 | dwarf2_per_cu_data *per_cu, |
1463 | dwarf2_per_objfile *per_objfile); | |
673bfd45 | 1464 | |
f792889a | 1465 | static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu); |
72019c9c | 1466 | |
120ce1b5 SM |
1467 | static void queue_comp_unit (dwarf2_per_cu_data *per_cu, |
1468 | dwarf2_per_objfile *per_objfile, | |
95554aad TT |
1469 | enum language pretend_language); |
1470 | ||
976ca316 | 1471 | static void process_queue (dwarf2_per_objfile *per_objfile); |
9291a0cd | 1472 | |
b303c6f6 AB |
1473 | /* Class, the destructor of which frees all allocated queue entries. This |
1474 | will only have work to do if an error was thrown while processing the | |
1475 | dwarf. If no error was thrown then the queue entries should have all | |
1476 | been processed, and freed, as we went along. */ | |
1477 | ||
1478 | class dwarf2_queue_guard | |
1479 | { | |
1480 | public: | |
39856def TT |
1481 | explicit dwarf2_queue_guard (dwarf2_per_objfile *per_objfile) |
1482 | : m_per_objfile (per_objfile) | |
1483 | { | |
08ac5771 SM |
1484 | gdb_assert (!m_per_objfile->per_bfd->queue.has_value ()); |
1485 | ||
1486 | m_per_objfile->per_bfd->queue.emplace (); | |
39856def | 1487 | } |
b303c6f6 AB |
1488 | |
1489 | /* Free any entries remaining on the queue. There should only be | |
1490 | entries left if we hit an error while processing the dwarf. */ | |
1491 | ~dwarf2_queue_guard () | |
1492 | { | |
08ac5771 SM |
1493 | gdb_assert (m_per_objfile->per_bfd->queue.has_value ()); |
1494 | ||
1495 | m_per_objfile->per_bfd->queue.reset (); | |
39856def | 1496 | } |
b303c6f6 | 1497 | |
39856def | 1498 | DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard); |
b303c6f6 | 1499 | |
39856def TT |
1500 | private: |
1501 | dwarf2_per_objfile *m_per_objfile; | |
b303c6f6 AB |
1502 | }; |
1503 | ||
39856def TT |
1504 | dwarf2_queue_item::~dwarf2_queue_item () |
1505 | { | |
1506 | /* Anything still marked queued is likely to be in an | |
1507 | inconsistent state, so discard it. */ | |
1508 | if (per_cu->queued) | |
1509 | { | |
7188ed02 | 1510 | per_objfile->remove_cu (per_cu); |
39856def TT |
1511 | per_cu->queued = 0; |
1512 | } | |
1513 | } | |
1514 | ||
473ab964 TT |
1515 | /* See dwarf2/read.h. */ |
1516 | ||
1517 | void | |
1518 | dwarf2_per_cu_data_deleter::operator() (dwarf2_per_cu_data *data) | |
1519 | { | |
1520 | if (data->is_debug_types) | |
1521 | delete static_cast<signatured_type *> (data); | |
1522 | else | |
1523 | delete data; | |
1524 | } | |
1525 | ||
d721ba37 PA |
1526 | /* The return type of find_file_and_directory. Note, the enclosed |
1527 | string pointers are only valid while this object is valid. */ | |
1528 | ||
1529 | struct file_and_directory | |
1530 | { | |
1531 | /* The filename. This is never NULL. */ | |
1532 | const char *name; | |
1533 | ||
1534 | /* The compilation directory. NULL if not known. If we needed to | |
1535 | compute a new string, this points to COMP_DIR_STORAGE, otherwise, | |
1536 | points directly to the DW_AT_comp_dir string attribute owned by | |
1537 | the obstack that owns the DIE. */ | |
1538 | const char *comp_dir; | |
1539 | ||
1540 | /* If we needed to build a new string for comp_dir, this is what | |
1541 | owns the storage. */ | |
1542 | std::string comp_dir_storage; | |
1543 | }; | |
1544 | ||
1545 | static file_and_directory find_file_and_directory (struct die_info *die, | |
1546 | struct dwarf2_cu *cu); | |
9291a0cd | 1547 | |
298e9637 | 1548 | static htab_up allocate_signatured_type_table (); |
1fd400ff | 1549 | |
298e9637 | 1550 | static htab_up allocate_dwo_unit_table (); |
3019eac3 | 1551 | |
57d63ce2 | 1552 | static struct dwo_unit *lookup_dwo_unit_in_dwp |
976ca316 SM |
1553 | (dwarf2_per_objfile *per_objfile, struct dwp_file *dwp_file, |
1554 | const char *comp_dir, ULONGEST signature, int is_debug_types); | |
a2ce51a0 | 1555 | |
976ca316 | 1556 | static struct dwp_file *get_dwp_file (dwarf2_per_objfile *per_objfile); |
a2ce51a0 | 1557 | |
3019eac3 | 1558 | static struct dwo_unit *lookup_dwo_comp_unit |
4ab09049 SM |
1559 | (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir, |
1560 | ULONGEST signature); | |
3019eac3 DE |
1561 | |
1562 | static struct dwo_unit *lookup_dwo_type_unit | |
4ab09049 | 1563 | (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir); |
3019eac3 | 1564 | |
1b555f17 | 1565 | static void queue_and_load_all_dwo_tus (dwarf2_cu *cu); |
89e63ee4 | 1566 | |
263db9a1 TT |
1567 | /* A unique pointer to a dwo_file. */ |
1568 | ||
51ac9db5 | 1569 | typedef std::unique_ptr<struct dwo_file> dwo_file_up; |
263db9a1 | 1570 | |
976ca316 | 1571 | static void process_cu_includes (dwarf2_per_objfile *per_objfile); |
95554aad | 1572 | |
1b80a9fa | 1573 | static void check_producer (struct dwarf2_cu *cu); |
527f3840 JK |
1574 | |
1575 | static void free_line_header_voidp (void *arg); | |
4390d890 DE |
1576 | \f |
1577 | /* Various complaints about symbol reading that don't abort the process. */ | |
1578 | ||
4390d890 DE |
1579 | static void |
1580 | dwarf2_debug_line_missing_file_complaint (void) | |
1581 | { | |
b98664d3 | 1582 | complaint (_(".debug_line section has line data without a file")); |
4390d890 DE |
1583 | } |
1584 | ||
1585 | static void | |
1586 | dwarf2_debug_line_missing_end_sequence_complaint (void) | |
1587 | { | |
b98664d3 | 1588 | complaint (_(".debug_line section has line " |
4390d890 DE |
1589 | "program sequence without an end")); |
1590 | } | |
1591 | ||
1592 | static void | |
1593 | dwarf2_complex_location_expr_complaint (void) | |
1594 | { | |
b98664d3 | 1595 | complaint (_("location expression too complex")); |
4390d890 DE |
1596 | } |
1597 | ||
1598 | static void | |
1599 | dwarf2_const_value_length_mismatch_complaint (const char *arg1, int arg2, | |
1600 | int arg3) | |
1601 | { | |
b98664d3 | 1602 | complaint (_("const value length mismatch for '%s', got %d, expected %d"), |
4390d890 DE |
1603 | arg1, arg2, arg3); |
1604 | } | |
1605 | ||
4390d890 DE |
1606 | static void |
1607 | dwarf2_invalid_attrib_class_complaint (const char *arg1, const char *arg2) | |
1608 | { | |
b98664d3 | 1609 | complaint (_("invalid attribute class or form for '%s' in '%s'"), |
4390d890 DE |
1610 | arg1, arg2); |
1611 | } | |
527f3840 JK |
1612 | |
1613 | /* Hash function for line_header_hash. */ | |
1614 | ||
1615 | static hashval_t | |
1616 | line_header_hash (const struct line_header *ofs) | |
1617 | { | |
9c541725 | 1618 | return to_underlying (ofs->sect_off) ^ ofs->offset_in_dwz; |
527f3840 JK |
1619 | } |
1620 | ||
1621 | /* Hash function for htab_create_alloc_ex for line_header_hash. */ | |
1622 | ||
1623 | static hashval_t | |
1624 | line_header_hash_voidp (const void *item) | |
1625 | { | |
9a3c8263 | 1626 | const struct line_header *ofs = (const struct line_header *) item; |
527f3840 JK |
1627 | |
1628 | return line_header_hash (ofs); | |
1629 | } | |
1630 | ||
1631 | /* Equality function for line_header_hash. */ | |
1632 | ||
1633 | static int | |
1634 | line_header_eq_voidp (const void *item_lhs, const void *item_rhs) | |
1635 | { | |
9a3c8263 SM |
1636 | const struct line_header *ofs_lhs = (const struct line_header *) item_lhs; |
1637 | const struct line_header *ofs_rhs = (const struct line_header *) item_rhs; | |
527f3840 | 1638 | |
9c541725 | 1639 | return (ofs_lhs->sect_off == ofs_rhs->sect_off |
527f3840 JK |
1640 | && ofs_lhs->offset_in_dwz == ofs_rhs->offset_in_dwz); |
1641 | } | |
1642 | ||
4390d890 | 1643 | \f |
9291a0cd | 1644 | |
330cdd98 PA |
1645 | /* See declaration. */ |
1646 | ||
5989a64e SM |
1647 | dwarf2_per_bfd::dwarf2_per_bfd (bfd *obfd, const dwarf2_debug_sections *names, |
1648 | bool can_copy_) | |
c3699833 SM |
1649 | : obfd (obfd), |
1650 | can_copy (can_copy_) | |
330cdd98 PA |
1651 | { |
1652 | if (names == NULL) | |
1653 | names = &dwarf2_elf_names; | |
1654 | ||
330cdd98 PA |
1655 | for (asection *sec = obfd->sections; sec != NULL; sec = sec->next) |
1656 | locate_sections (obfd, sec, *names); | |
1657 | } | |
1658 | ||
5989a64e | 1659 | dwarf2_per_bfd::~dwarf2_per_bfd () |
330cdd98 | 1660 | { |
0d305d5c | 1661 | for (auto &per_cu : all_comp_units) |
ae640021 | 1662 | per_cu->imported_symtabs_free (); |
fc8e7e75 | 1663 | |
5989a64e | 1664 | /* Everything else should be on this->obstack. */ |
330cdd98 PA |
1665 | } |
1666 | ||
7188ed02 | 1667 | /* See read.h. */ |
330cdd98 PA |
1668 | |
1669 | void | |
7188ed02 | 1670 | dwarf2_per_objfile::remove_all_cus () |
330cdd98 | 1671 | { |
08ac5771 SM |
1672 | gdb_assert (!this->per_bfd->queue.has_value ()); |
1673 | ||
7188ed02 SM |
1674 | for (auto pair : m_dwarf2_cus) |
1675 | delete pair.second; | |
330cdd98 | 1676 | |
7188ed02 | 1677 | m_dwarf2_cus.clear (); |
330cdd98 PA |
1678 | } |
1679 | ||
11ed8cad TT |
1680 | /* A helper class that calls free_cached_comp_units on |
1681 | destruction. */ | |
1682 | ||
1683 | class free_cached_comp_units | |
1684 | { | |
1685 | public: | |
1686 | ||
1687 | explicit free_cached_comp_units (dwarf2_per_objfile *per_objfile) | |
1688 | : m_per_objfile (per_objfile) | |
1689 | { | |
1690 | } | |
1691 | ||
1692 | ~free_cached_comp_units () | |
1693 | { | |
7188ed02 | 1694 | m_per_objfile->remove_all_cus (); |
11ed8cad TT |
1695 | } |
1696 | ||
1697 | DISABLE_COPY_AND_ASSIGN (free_cached_comp_units); | |
1698 | ||
1699 | private: | |
1700 | ||
1701 | dwarf2_per_objfile *m_per_objfile; | |
1702 | }; | |
1703 | ||
af758d11 SM |
1704 | /* See read.h. */ |
1705 | ||
1706 | bool | |
1707 | dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data *per_cu) const | |
1708 | { | |
1709 | gdb_assert (per_cu->index < this->m_symtabs.size ()); | |
1710 | ||
1711 | return this->m_symtabs[per_cu->index] != nullptr; | |
1712 | } | |
1713 | ||
1714 | /* See read.h. */ | |
1715 | ||
1716 | compunit_symtab * | |
1717 | dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data *per_cu) const | |
1718 | { | |
1719 | gdb_assert (per_cu->index < this->m_symtabs.size ()); | |
1720 | ||
1721 | return this->m_symtabs[per_cu->index]; | |
1722 | } | |
1723 | ||
1724 | /* See read.h. */ | |
1725 | ||
1726 | void | |
1727 | dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data *per_cu, | |
1728 | compunit_symtab *symtab) | |
1729 | { | |
1730 | gdb_assert (per_cu->index < this->m_symtabs.size ()); | |
1731 | gdb_assert (this->m_symtabs[per_cu->index] == nullptr); | |
1732 | ||
1733 | this->m_symtabs[per_cu->index] = symtab; | |
1734 | } | |
1735 | ||
c906108c | 1736 | /* Try to locate the sections we need for DWARF 2 debugging |
251d32d9 TG |
1737 | information and return true if we have enough to do something. |
1738 | NAMES points to the dwarf2 section names, or is NULL if the standard | |
4b610737 TT |
1739 | ELF names are used. CAN_COPY is true for formats where symbol |
1740 | interposition is possible and so symbol values must follow copy | |
1741 | relocation rules. */ | |
c906108c SS |
1742 | |
1743 | int | |
251d32d9 | 1744 | dwarf2_has_info (struct objfile *objfile, |
dda83cd7 | 1745 | const struct dwarf2_debug_sections *names, |
4b610737 | 1746 | bool can_copy) |
c906108c | 1747 | { |
97cbe998 SDJ |
1748 | if (objfile->flags & OBJF_READNEVER) |
1749 | return 0; | |
1750 | ||
976ca316 | 1751 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 1752 | |
976ca316 | 1753 | if (per_objfile == NULL) |
5989a64e | 1754 | { |
17ee85fc TT |
1755 | dwarf2_per_bfd *per_bfd; |
1756 | ||
8a91fbdf SM |
1757 | /* We can share a "dwarf2_per_bfd" with other objfiles if the |
1758 | BFD doesn't require relocations. | |
1759 | ||
1760 | We don't share with objfiles for which -readnow was requested, | |
1761 | because it would complicate things when loading the same BFD with | |
1762 | -readnow and then without -readnow. */ | |
1763 | if (!gdb_bfd_requires_relocations (objfile->obfd) | |
1764 | && (objfile->flags & OBJF_READNOW) == 0) | |
17ee85fc TT |
1765 | { |
1766 | /* See if one has been created for this BFD yet. */ | |
1767 | per_bfd = dwarf2_per_bfd_bfd_data_key.get (objfile->obfd); | |
1768 | ||
1769 | if (per_bfd == nullptr) | |
1770 | { | |
1771 | /* No, create it now. */ | |
1772 | per_bfd = new dwarf2_per_bfd (objfile->obfd, names, can_copy); | |
1773 | dwarf2_per_bfd_bfd_data_key.set (objfile->obfd, per_bfd); | |
1774 | } | |
1775 | } | |
1776 | else | |
1777 | { | |
1778 | /* No sharing possible, create one specifically for this objfile. */ | |
1779 | per_bfd = new dwarf2_per_bfd (objfile->obfd, names, can_copy); | |
1780 | dwarf2_per_bfd_objfile_data_key.set (objfile, per_bfd); | |
1781 | } | |
5989a64e | 1782 | |
976ca316 | 1783 | per_objfile = dwarf2_objfile_data_key.emplace (objfile, objfile, per_bfd); |
5989a64e | 1784 | } |
5bfd760d | 1785 | |
976ca316 SM |
1786 | return (!per_objfile->per_bfd->info.is_virtual |
1787 | && per_objfile->per_bfd->info.s.section != NULL | |
1788 | && !per_objfile->per_bfd->abbrev.is_virtual | |
1789 | && per_objfile->per_bfd->abbrev.s.section != NULL); | |
73869dc2 DE |
1790 | } |
1791 | ||
330cdd98 | 1792 | /* See declaration. */ |
c906108c | 1793 | |
330cdd98 | 1794 | void |
5989a64e SM |
1795 | dwarf2_per_bfd::locate_sections (bfd *abfd, asection *sectp, |
1796 | const dwarf2_debug_sections &names) | |
c906108c | 1797 | { |
fd361982 | 1798 | flagword aflag = bfd_section_flags (sectp); |
251d32d9 | 1799 | |
dc7650b8 JK |
1800 | if ((aflag & SEC_HAS_CONTENTS) == 0) |
1801 | { | |
1802 | } | |
950b7495 KS |
1803 | else if (elf_section_data (sectp)->this_hdr.sh_size |
1804 | > bfd_get_file_size (abfd)) | |
1805 | { | |
1806 | bfd_size_type size = elf_section_data (sectp)->this_hdr.sh_size; | |
1807 | warning (_("Discarding section %s which has a section size (%s" | |
1808 | ") larger than the file size [in module %s]"), | |
1809 | bfd_section_name (sectp), phex_nz (size, sizeof (size)), | |
1810 | bfd_get_filename (abfd)); | |
1811 | } | |
fbedd546 | 1812 | else if (names.info.matches (sectp->name)) |
c906108c | 1813 | { |
330cdd98 | 1814 | this->info.s.section = sectp; |
fd361982 | 1815 | this->info.size = bfd_section_size (sectp); |
c906108c | 1816 | } |
fbedd546 | 1817 | else if (names.abbrev.matches (sectp->name)) |
c906108c | 1818 | { |
330cdd98 | 1819 | this->abbrev.s.section = sectp; |
fd361982 | 1820 | this->abbrev.size = bfd_section_size (sectp); |
c906108c | 1821 | } |
fbedd546 | 1822 | else if (names.line.matches (sectp->name)) |
c906108c | 1823 | { |
330cdd98 | 1824 | this->line.s.section = sectp; |
fd361982 | 1825 | this->line.size = bfd_section_size (sectp); |
c906108c | 1826 | } |
fbedd546 | 1827 | else if (names.loc.matches (sectp->name)) |
c906108c | 1828 | { |
330cdd98 | 1829 | this->loc.s.section = sectp; |
fd361982 | 1830 | this->loc.size = bfd_section_size (sectp); |
c906108c | 1831 | } |
fbedd546 | 1832 | else if (names.loclists.matches (sectp->name)) |
43988095 | 1833 | { |
330cdd98 | 1834 | this->loclists.s.section = sectp; |
fd361982 | 1835 | this->loclists.size = bfd_section_size (sectp); |
43988095 | 1836 | } |
fbedd546 | 1837 | else if (names.macinfo.matches (sectp->name)) |
c906108c | 1838 | { |
330cdd98 | 1839 | this->macinfo.s.section = sectp; |
fd361982 | 1840 | this->macinfo.size = bfd_section_size (sectp); |
c906108c | 1841 | } |
fbedd546 | 1842 | else if (names.macro.matches (sectp->name)) |
cf2c3c16 | 1843 | { |
330cdd98 | 1844 | this->macro.s.section = sectp; |
fd361982 | 1845 | this->macro.size = bfd_section_size (sectp); |
cf2c3c16 | 1846 | } |
fbedd546 | 1847 | else if (names.str.matches (sectp->name)) |
c906108c | 1848 | { |
330cdd98 | 1849 | this->str.s.section = sectp; |
fd361982 | 1850 | this->str.size = bfd_section_size (sectp); |
c906108c | 1851 | } |
fbedd546 | 1852 | else if (names.str_offsets.matches (sectp->name)) |
18a8505e AT |
1853 | { |
1854 | this->str_offsets.s.section = sectp; | |
1855 | this->str_offsets.size = bfd_section_size (sectp); | |
1856 | } | |
fbedd546 | 1857 | else if (names.line_str.matches (sectp->name)) |
43988095 | 1858 | { |
330cdd98 | 1859 | this->line_str.s.section = sectp; |
fd361982 | 1860 | this->line_str.size = bfd_section_size (sectp); |
43988095 | 1861 | } |
fbedd546 | 1862 | else if (names.addr.matches (sectp->name)) |
3019eac3 | 1863 | { |
330cdd98 | 1864 | this->addr.s.section = sectp; |
fd361982 | 1865 | this->addr.size = bfd_section_size (sectp); |
3019eac3 | 1866 | } |
fbedd546 | 1867 | else if (names.frame.matches (sectp->name)) |
b6af0555 | 1868 | { |
330cdd98 | 1869 | this->frame.s.section = sectp; |
fd361982 | 1870 | this->frame.size = bfd_section_size (sectp); |
b6af0555 | 1871 | } |
fbedd546 | 1872 | else if (names.eh_frame.matches (sectp->name)) |
b6af0555 | 1873 | { |
330cdd98 | 1874 | this->eh_frame.s.section = sectp; |
fd361982 | 1875 | this->eh_frame.size = bfd_section_size (sectp); |
b6af0555 | 1876 | } |
fbedd546 | 1877 | else if (names.ranges.matches (sectp->name)) |
af34e669 | 1878 | { |
330cdd98 | 1879 | this->ranges.s.section = sectp; |
fd361982 | 1880 | this->ranges.size = bfd_section_size (sectp); |
af34e669 | 1881 | } |
fbedd546 | 1882 | else if (names.rnglists.matches (sectp->name)) |
43988095 | 1883 | { |
330cdd98 | 1884 | this->rnglists.s.section = sectp; |
fd361982 | 1885 | this->rnglists.size = bfd_section_size (sectp); |
43988095 | 1886 | } |
fbedd546 | 1887 | else if (names.types.matches (sectp->name)) |
348e048f | 1888 | { |
8b70b953 TT |
1889 | struct dwarf2_section_info type_section; |
1890 | ||
1891 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 1892 | type_section.s.section = sectp; |
fd361982 | 1893 | type_section.size = bfd_section_size (sectp); |
8b70b953 | 1894 | |
fd5866f6 | 1895 | this->types.push_back (type_section); |
348e048f | 1896 | } |
fbedd546 | 1897 | else if (names.gdb_index.matches (sectp->name)) |
9291a0cd | 1898 | { |
330cdd98 | 1899 | this->gdb_index.s.section = sectp; |
fd361982 | 1900 | this->gdb_index.size = bfd_section_size (sectp); |
9291a0cd | 1901 | } |
fbedd546 | 1902 | else if (names.debug_names.matches (sectp->name)) |
927aa2e7 JK |
1903 | { |
1904 | this->debug_names.s.section = sectp; | |
fd361982 | 1905 | this->debug_names.size = bfd_section_size (sectp); |
927aa2e7 | 1906 | } |
fbedd546 | 1907 | else if (names.debug_aranges.matches (sectp->name)) |
927aa2e7 JK |
1908 | { |
1909 | this->debug_aranges.s.section = sectp; | |
fd361982 | 1910 | this->debug_aranges.size = bfd_section_size (sectp); |
927aa2e7 | 1911 | } |
dce234bc | 1912 | |
fd361982 AM |
1913 | if ((bfd_section_flags (sectp) & (SEC_LOAD | SEC_ALLOC)) |
1914 | && bfd_section_vma (sectp) == 0) | |
330cdd98 | 1915 | this->has_section_at_zero = true; |
c906108c SS |
1916 | } |
1917 | ||
dce234bc | 1918 | /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and |
0963b4bd | 1919 | SECTION_NAME. */ |
af34e669 | 1920 | |
dce234bc | 1921 | void |
3017a003 | 1922 | dwarf2_get_section_info (struct objfile *objfile, |
dda83cd7 SM |
1923 | enum dwarf2_section_enum sect, |
1924 | asection **sectp, const gdb_byte **bufp, | |
1925 | bfd_size_type *sizep) | |
dce234bc | 1926 | { |
976ca316 | 1927 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
dce234bc | 1928 | struct dwarf2_section_info *info; |
a3b2a86b TT |
1929 | |
1930 | /* We may see an objfile without any DWARF, in which case we just | |
1931 | return nothing. */ | |
976ca316 | 1932 | if (per_objfile == NULL) |
a3b2a86b TT |
1933 | { |
1934 | *sectp = NULL; | |
1935 | *bufp = NULL; | |
1936 | *sizep = 0; | |
1937 | return; | |
1938 | } | |
3017a003 TG |
1939 | switch (sect) |
1940 | { | |
1941 | case DWARF2_DEBUG_FRAME: | |
976ca316 | 1942 | info = &per_objfile->per_bfd->frame; |
3017a003 TG |
1943 | break; |
1944 | case DWARF2_EH_FRAME: | |
976ca316 | 1945 | info = &per_objfile->per_bfd->eh_frame; |
3017a003 TG |
1946 | break; |
1947 | default: | |
1948 | gdb_assert_not_reached ("unexpected section"); | |
1949 | } | |
dce234bc | 1950 | |
96b79293 | 1951 | info->read (objfile); |
dce234bc | 1952 | |
96b79293 | 1953 | *sectp = info->get_bfd_section (); |
dce234bc PP |
1954 | *bufp = info->buffer; |
1955 | *sizep = info->size; | |
1956 | } | |
1957 | ||
9291a0cd | 1958 | \f |
39298a5d | 1959 | /* DWARF quick_symbol_functions support. */ |
7b9f3c50 DE |
1960 | |
1961 | /* TUs can share .debug_line entries, and there can be a lot more TUs than | |
1962 | unique line tables, so we maintain a separate table of all .debug_line | |
1963 | derived entries to support the sharing. | |
1964 | All the quick functions need is the list of file names. We discard the | |
1965 | line_header when we're done and don't need to record it here. */ | |
1966 | struct quick_file_names | |
1967 | { | |
094b34ac DE |
1968 | /* The data used to construct the hash key. */ |
1969 | struct stmt_list_hash hash; | |
7b9f3c50 DE |
1970 | |
1971 | /* The number of entries in file_names, real_names. */ | |
1972 | unsigned int num_file_names; | |
1973 | ||
1974 | /* The file names from the line table, after being run through | |
1975 | file_full_name. */ | |
1976 | const char **file_names; | |
1977 | ||
1978 | /* The file names from the line table after being run through | |
1979 | gdb_realpath. These are computed lazily. */ | |
1980 | const char **real_names; | |
1981 | }; | |
1982 | ||
1983 | /* When using the index (and thus not using psymtabs), each CU has an | |
1984 | object of this type. This is used to hold information needed by | |
1985 | the various "quick" methods. */ | |
1986 | struct dwarf2_per_cu_quick_data | |
1987 | { | |
1988 | /* The file table. This can be NULL if there was no file table | |
1989 | or it's currently not read in. | |
5989a64e | 1990 | NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */ |
7b9f3c50 DE |
1991 | struct quick_file_names *file_names; |
1992 | ||
7b9f3c50 DE |
1993 | /* A temporary mark bit used when iterating over all CUs in |
1994 | expand_symtabs_matching. */ | |
1995 | unsigned int mark : 1; | |
1996 | ||
1997 | /* True if we've tried to read the file table and found there isn't one. | |
1998 | There will be no point in trying to read it again next time. */ | |
1999 | unsigned int no_file_data : 1; | |
2000 | }; | |
2001 | ||
edc02ceb TT |
2002 | /* A subclass of psymbol_functions that arranges to read the DWARF |
2003 | partial symbols when needed. */ | |
2004 | struct lazy_dwarf_reader : public psymbol_functions | |
2005 | { | |
2006 | using psymbol_functions::psymbol_functions; | |
2007 | ||
2008 | bool can_lazily_read_symbols () override | |
2009 | { | |
2010 | return true; | |
2011 | } | |
2012 | ||
2013 | void read_partial_symbols (struct objfile *objfile) override | |
2014 | { | |
2015 | if (dwarf2_has_info (objfile, nullptr)) | |
2016 | dwarf2_build_psymtabs (objfile, this); | |
2017 | } | |
2018 | }; | |
2019 | ||
2020 | static quick_symbol_functions_up | |
2021 | make_lazy_dwarf_reader () | |
2022 | { | |
2023 | return quick_symbol_functions_up (new lazy_dwarf_reader); | |
2024 | } | |
2025 | ||
39298a5d TT |
2026 | struct dwarf2_base_index_functions : public quick_symbol_functions |
2027 | { | |
2028 | bool has_symbols (struct objfile *objfile) override; | |
2029 | ||
2030 | struct symtab *find_last_source_symtab (struct objfile *objfile) override; | |
2031 | ||
2032 | void forget_cached_source_info (struct objfile *objfile) override; | |
2033 | ||
39298a5d TT |
2034 | enum language lookup_global_symbol_language (struct objfile *objfile, |
2035 | const char *name, | |
2036 | domain_enum domain, | |
2037 | bool *symbol_found_p) override | |
2038 | { | |
2039 | *symbol_found_p = false; | |
2040 | return language_unknown; | |
2041 | } | |
2042 | ||
4829711b | 2043 | void print_stats (struct objfile *objfile, bool print_bcache) override; |
39298a5d TT |
2044 | |
2045 | void expand_all_symtabs (struct objfile *objfile) override; | |
2046 | ||
39298a5d TT |
2047 | struct compunit_symtab *find_pc_sect_compunit_symtab |
2048 | (struct objfile *objfile, struct bound_minimal_symbol msymbol, | |
2049 | CORE_ADDR pc, struct obj_section *section, int warn_if_readin) override; | |
2050 | ||
2051 | struct compunit_symtab *find_compunit_symtab_by_address | |
2052 | (struct objfile *objfile, CORE_ADDR address) override | |
2053 | { | |
2054 | return nullptr; | |
2055 | } | |
2056 | ||
2057 | void map_symbol_filenames (struct objfile *objfile, | |
f4655dee TT |
2058 | gdb::function_view<symbol_filename_ftype> fun, |
2059 | bool need_fullname) override; | |
39298a5d TT |
2060 | }; |
2061 | ||
2062 | struct dwarf2_gdb_index : public dwarf2_base_index_functions | |
2063 | { | |
39298a5d TT |
2064 | void dump (struct objfile *objfile) override; |
2065 | ||
0b7b2c2a | 2066 | void expand_matching_symbols |
39298a5d TT |
2067 | (struct objfile *, |
2068 | const lookup_name_info &lookup_name, | |
2069 | domain_enum domain, | |
2070 | int global, | |
39298a5d TT |
2071 | symbol_compare_ftype *ordered_compare) override; |
2072 | ||
df35e626 | 2073 | bool expand_symtabs_matching |
39298a5d TT |
2074 | (struct objfile *objfile, |
2075 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
2076 | const lookup_name_info *lookup_name, | |
2077 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
2078 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 2079 | block_search_flags search_flags, |
3bfa51a7 | 2080 | domain_enum domain, |
39298a5d TT |
2081 | enum search_domain kind) override; |
2082 | }; | |
2083 | ||
2084 | struct dwarf2_debug_names_index : public dwarf2_base_index_functions | |
2085 | { | |
39298a5d TT |
2086 | void dump (struct objfile *objfile) override; |
2087 | ||
0b7b2c2a | 2088 | void expand_matching_symbols |
39298a5d TT |
2089 | (struct objfile *, |
2090 | const lookup_name_info &lookup_name, | |
2091 | domain_enum domain, | |
2092 | int global, | |
39298a5d TT |
2093 | symbol_compare_ftype *ordered_compare) override; |
2094 | ||
df35e626 | 2095 | bool expand_symtabs_matching |
39298a5d TT |
2096 | (struct objfile *objfile, |
2097 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
2098 | const lookup_name_info *lookup_name, | |
2099 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
2100 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 2101 | block_search_flags search_flags, |
3bfa51a7 | 2102 | domain_enum domain, |
39298a5d TT |
2103 | enum search_domain kind) override; |
2104 | }; | |
2105 | ||
edc02ceb | 2106 | static quick_symbol_functions_up |
39298a5d TT |
2107 | make_dwarf_gdb_index () |
2108 | { | |
2109 | return quick_symbol_functions_up (new dwarf2_gdb_index); | |
2110 | } | |
2111 | ||
edc02ceb | 2112 | static quick_symbol_functions_up |
39298a5d TT |
2113 | make_dwarf_debug_names () |
2114 | { | |
2115 | return quick_symbol_functions_up (new dwarf2_debug_names_index); | |
2116 | } | |
2117 | ||
094b34ac DE |
2118 | /* Utility hash function for a stmt_list_hash. */ |
2119 | ||
2120 | static hashval_t | |
2121 | hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash) | |
2122 | { | |
2123 | hashval_t v = 0; | |
2124 | ||
2125 | if (stmt_list_hash->dwo_unit != NULL) | |
2126 | v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file; | |
9c541725 | 2127 | v += to_underlying (stmt_list_hash->line_sect_off); |
094b34ac DE |
2128 | return v; |
2129 | } | |
2130 | ||
2131 | /* Utility equality function for a stmt_list_hash. */ | |
2132 | ||
2133 | static int | |
2134 | eq_stmt_list_entry (const struct stmt_list_hash *lhs, | |
2135 | const struct stmt_list_hash *rhs) | |
2136 | { | |
2137 | if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL)) | |
2138 | return 0; | |
2139 | if (lhs->dwo_unit != NULL | |
2140 | && lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file) | |
2141 | return 0; | |
2142 | ||
9c541725 | 2143 | return lhs->line_sect_off == rhs->line_sect_off; |
094b34ac DE |
2144 | } |
2145 | ||
7b9f3c50 DE |
2146 | /* Hash function for a quick_file_names. */ |
2147 | ||
2148 | static hashval_t | |
2149 | hash_file_name_entry (const void *e) | |
2150 | { | |
9a3c8263 SM |
2151 | const struct quick_file_names *file_data |
2152 | = (const struct quick_file_names *) e; | |
7b9f3c50 | 2153 | |
094b34ac | 2154 | return hash_stmt_list_entry (&file_data->hash); |
7b9f3c50 DE |
2155 | } |
2156 | ||
2157 | /* Equality function for a quick_file_names. */ | |
2158 | ||
2159 | static int | |
2160 | eq_file_name_entry (const void *a, const void *b) | |
2161 | { | |
9a3c8263 SM |
2162 | const struct quick_file_names *ea = (const struct quick_file_names *) a; |
2163 | const struct quick_file_names *eb = (const struct quick_file_names *) b; | |
7b9f3c50 | 2164 | |
094b34ac | 2165 | return eq_stmt_list_entry (&ea->hash, &eb->hash); |
7b9f3c50 DE |
2166 | } |
2167 | ||
2168 | /* Delete function for a quick_file_names. */ | |
2169 | ||
2170 | static void | |
2171 | delete_file_name_entry (void *e) | |
2172 | { | |
9a3c8263 | 2173 | struct quick_file_names *file_data = (struct quick_file_names *) e; |
7b9f3c50 DE |
2174 | int i; |
2175 | ||
2176 | for (i = 0; i < file_data->num_file_names; ++i) | |
2177 | { | |
2178 | xfree ((void*) file_data->file_names[i]); | |
2179 | if (file_data->real_names) | |
2180 | xfree ((void*) file_data->real_names[i]); | |
2181 | } | |
2182 | ||
45940949 TT |
2183 | /* The space for the struct itself lives on the obstack, so we don't |
2184 | free it here. */ | |
7b9f3c50 DE |
2185 | } |
2186 | ||
2187 | /* Create a quick_file_names hash table. */ | |
2188 | ||
5895093f | 2189 | static htab_up |
7b9f3c50 DE |
2190 | create_quick_file_names_table (unsigned int nr_initial_entries) |
2191 | { | |
5895093f TT |
2192 | return htab_up (htab_create_alloc (nr_initial_entries, |
2193 | hash_file_name_entry, eq_file_name_entry, | |
2194 | delete_file_name_entry, xcalloc, xfree)); | |
7b9f3c50 | 2195 | } |
9291a0cd | 2196 | |
ab432490 SM |
2197 | /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This |
2198 | function is unrelated to symtabs, symtab would have to be created afterwards. | |
2199 | You should call age_cached_comp_units after processing the CU. */ | |
918dd910 | 2200 | |
1b555f17 | 2201 | static dwarf2_cu * |
ab432490 SM |
2202 | load_cu (dwarf2_per_cu_data *per_cu, dwarf2_per_objfile *per_objfile, |
2203 | bool skip_partial) | |
918dd910 | 2204 | { |
3019eac3 | 2205 | if (per_cu->is_debug_types) |
ab432490 | 2206 | load_full_type_unit (per_cu, per_objfile); |
918dd910 | 2207 | else |
4a636814 SM |
2208 | load_full_comp_unit (per_cu, per_objfile, per_objfile->get_cu (per_cu), |
2209 | skip_partial, language_minimal); | |
918dd910 | 2210 | |
7188ed02 SM |
2211 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
2212 | if (cu == nullptr) | |
1b555f17 | 2213 | return nullptr; /* Dummy CU. */ |
2dc860c0 | 2214 | |
7188ed02 | 2215 | dwarf2_find_base_address (cu->dies, cu); |
1b555f17 | 2216 | |
7188ed02 | 2217 | return cu; |
918dd910 JK |
2218 | } |
2219 | ||
1350c3b4 | 2220 | /* Read in the symbols for PER_CU in the context of PER_OBJFILE. */ |
2fdf6df6 | 2221 | |
9291a0cd | 2222 | static void |
97a1449a | 2223 | dw2_do_instantiate_symtab (dwarf2_per_cu_data *per_cu, |
976ca316 | 2224 | dwarf2_per_objfile *per_objfile, bool skip_partial) |
9291a0cd | 2225 | { |
f4dc4d17 DE |
2226 | /* Skip type_unit_groups, reading the type units they contain |
2227 | is handled elsewhere. */ | |
197400e8 | 2228 | if (per_cu->type_unit_group_p ()) |
f4dc4d17 DE |
2229 | return; |
2230 | ||
08ac5771 SM |
2231 | { |
2232 | /* The destructor of dwarf2_queue_guard frees any entries left on | |
2233 | the queue. After this point we're guaranteed to leave this function | |
2234 | with the dwarf queue empty. */ | |
2235 | dwarf2_queue_guard q_guard (per_objfile); | |
89e63ee4 | 2236 | |
08ac5771 SM |
2237 | if (!per_objfile->symtab_set_p (per_cu)) |
2238 | { | |
2239 | queue_comp_unit (per_cu, per_objfile, language_minimal); | |
2240 | dwarf2_cu *cu = load_cu (per_cu, per_objfile, skip_partial); | |
2241 | ||
2242 | /* If we just loaded a CU from a DWO, and we're working with an index | |
2243 | that may badly handle TUs, load all the TUs in that DWO as well. | |
2244 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
2245 | if (!per_cu->is_debug_types | |
2246 | && cu != NULL | |
2247 | && cu->dwo_unit != NULL | |
2248 | && per_objfile->per_bfd->index_table != NULL | |
2249 | && per_objfile->per_bfd->index_table->version <= 7 | |
2250 | /* DWP files aren't supported yet. */ | |
2251 | && get_dwp_file (per_objfile) == NULL) | |
2252 | queue_and_load_all_dwo_tus (cu); | |
2253 | } | |
9291a0cd | 2254 | |
08ac5771 SM |
2255 | process_queue (per_objfile); |
2256 | } | |
9291a0cd TT |
2257 | |
2258 | /* Age the cache, releasing compilation units that have not | |
2259 | been used recently. */ | |
976ca316 | 2260 | per_objfile->age_comp_units (); |
9291a0cd TT |
2261 | } |
2262 | ||
97a1449a SM |
2263 | /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is |
2264 | the per-objfile for which this symtab is instantiated. | |
2265 | ||
2266 | Returns the resulting symbol table. */ | |
2fdf6df6 | 2267 | |
43f3e411 | 2268 | static struct compunit_symtab * |
97a1449a | 2269 | dw2_instantiate_symtab (dwarf2_per_cu_data *per_cu, |
976ca316 | 2270 | dwarf2_per_objfile *per_objfile, |
97a1449a | 2271 | bool skip_partial) |
9291a0cd | 2272 | { |
976ca316 | 2273 | gdb_assert (per_objfile->per_bfd->using_index); |
af758d11 | 2274 | |
976ca316 | 2275 | if (!per_objfile->symtab_set_p (per_cu)) |
9291a0cd | 2276 | { |
976ca316 | 2277 | free_cached_comp_units freer (per_objfile); |
c83dd867 | 2278 | scoped_restore decrementer = increment_reading_symtab (); |
976ca316 SM |
2279 | dw2_do_instantiate_symtab (per_cu, per_objfile, skip_partial); |
2280 | process_cu_includes (per_objfile); | |
9291a0cd | 2281 | } |
f194fefb | 2282 | |
976ca316 | 2283 | return per_objfile->get_symtab (per_cu); |
9291a0cd TT |
2284 | } |
2285 | ||
d3473f0c TT |
2286 | /* See read.h. */ |
2287 | ||
473ab964 | 2288 | dwarf2_per_cu_data_up |
5989a64e | 2289 | dwarf2_per_bfd::allocate_per_cu () |
d3473f0c | 2290 | { |
473ab964 | 2291 | dwarf2_per_cu_data_up result (new dwarf2_per_cu_data); |
1859c670 | 2292 | result->per_bfd = this; |
d3473f0c TT |
2293 | result->index = m_num_psymtabs++; |
2294 | return result; | |
2295 | } | |
2296 | ||
2297 | /* See read.h. */ | |
2298 | ||
0d305d5c | 2299 | std::unique_ptr<signatured_type> |
5989a64e | 2300 | dwarf2_per_bfd::allocate_signatured_type () |
d3473f0c | 2301 | { |
0d305d5c TT |
2302 | std::unique_ptr<signatured_type> result (new signatured_type); |
2303 | result->per_bfd = this; | |
2304 | result->index = m_num_psymtabs++; | |
91eea9cc | 2305 | tu_stats.nr_tus++; |
d3473f0c TT |
2306 | return result; |
2307 | } | |
2308 | ||
168c9250 | 2309 | /* Return a new dwarf2_per_cu_data allocated on the per-bfd |
45940949 | 2310 | obstack, and constructed with the specified field values. */ |
4b514bc8 | 2311 | |
473ab964 | 2312 | static dwarf2_per_cu_data_up |
168c9250 SM |
2313 | create_cu_from_index_list (dwarf2_per_bfd *per_bfd, |
2314 | struct dwarf2_section_info *section, | |
2315 | int is_dwz, | |
2316 | sect_offset sect_off, ULONGEST length) | |
4b514bc8 | 2317 | { |
473ab964 | 2318 | dwarf2_per_cu_data_up the_cu = per_bfd->allocate_per_cu (); |
4b514bc8 JK |
2319 | the_cu->sect_off = sect_off; |
2320 | the_cu->length = length; | |
4b514bc8 | 2321 | the_cu->section = section; |
168c9250 | 2322 | the_cu->v.quick = OBSTACK_ZALLOC (&per_bfd->obstack, |
45940949 | 2323 | struct dwarf2_per_cu_quick_data); |
4b514bc8 JK |
2324 | the_cu->is_dwz = is_dwz; |
2325 | return the_cu; | |
2326 | } | |
2327 | ||
2ec9a5e0 TT |
2328 | /* A helper for create_cus_from_index that handles a given list of |
2329 | CUs. */ | |
2fdf6df6 | 2330 | |
74a0d9f6 | 2331 | static void |
168c9250 | 2332 | create_cus_from_index_list (dwarf2_per_bfd *per_bfd, |
2ec9a5e0 TT |
2333 | const gdb_byte *cu_list, offset_type n_elements, |
2334 | struct dwarf2_section_info *section, | |
b76e467d | 2335 | int is_dwz) |
9291a0cd | 2336 | { |
12359b5e | 2337 | for (offset_type i = 0; i < n_elements; i += 2) |
9291a0cd | 2338 | { |
74a0d9f6 | 2339 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2340 | |
2341 | sect_offset sect_off | |
2342 | = (sect_offset) extract_unsigned_integer (cu_list, 8, BFD_ENDIAN_LITTLE); | |
2343 | ULONGEST length = extract_unsigned_integer (cu_list + 8, 8, BFD_ENDIAN_LITTLE); | |
9291a0cd TT |
2344 | cu_list += 2 * 8; |
2345 | ||
473ab964 | 2346 | dwarf2_per_cu_data_up per_cu |
168c9250 SM |
2347 | = create_cu_from_index_list (per_bfd, section, is_dwz, sect_off, |
2348 | length); | |
0d305d5c | 2349 | per_bfd->all_comp_units.push_back (std::move (per_cu)); |
9291a0cd | 2350 | } |
9291a0cd TT |
2351 | } |
2352 | ||
2ec9a5e0 | 2353 | /* Read the CU list from the mapped index, and use it to create all |
168c9250 | 2354 | the CU objects for PER_BFD. */ |
2ec9a5e0 | 2355 | |
74a0d9f6 | 2356 | static void |
168c9250 | 2357 | create_cus_from_index (dwarf2_per_bfd *per_bfd, |
2ec9a5e0 TT |
2358 | const gdb_byte *cu_list, offset_type cu_list_elements, |
2359 | const gdb_byte *dwz_list, offset_type dwz_elements) | |
2360 | { | |
168c9250 SM |
2361 | gdb_assert (per_bfd->all_comp_units.empty ()); |
2362 | per_bfd->all_comp_units.reserve ((cu_list_elements + dwz_elements) / 2); | |
2ec9a5e0 | 2363 | |
168c9250 SM |
2364 | create_cus_from_index_list (per_bfd, cu_list, cu_list_elements, |
2365 | &per_bfd->info, 0); | |
2ec9a5e0 TT |
2366 | |
2367 | if (dwz_elements == 0) | |
74a0d9f6 | 2368 | return; |
2ec9a5e0 | 2369 | |
168c9250 SM |
2370 | dwz_file *dwz = dwarf2_get_dwz_file (per_bfd); |
2371 | create_cus_from_index_list (per_bfd, dwz_list, dwz_elements, | |
b76e467d | 2372 | &dwz->info, 1); |
2ec9a5e0 TT |
2373 | } |
2374 | ||
1fd400ff | 2375 | /* Create the signatured type hash table from the index. */ |
673bfd45 | 2376 | |
74a0d9f6 | 2377 | static void |
12359b5e | 2378 | create_signatured_type_table_from_index |
168c9250 SM |
2379 | (dwarf2_per_bfd *per_bfd, struct dwarf2_section_info *section, |
2380 | const gdb_byte *bytes, offset_type elements) | |
1fd400ff | 2381 | { |
298e9637 | 2382 | htab_up sig_types_hash = allocate_signatured_type_table (); |
1fd400ff | 2383 | |
12359b5e | 2384 | for (offset_type i = 0; i < elements; i += 3) |
1fd400ff | 2385 | { |
0d305d5c | 2386 | std::unique_ptr<signatured_type> sig_type; |
9c541725 | 2387 | ULONGEST signature; |
1fd400ff | 2388 | void **slot; |
9c541725 | 2389 | cu_offset type_offset_in_tu; |
1fd400ff | 2390 | |
74a0d9f6 | 2391 | gdb_static_assert (sizeof (ULONGEST) >= 8); |
9c541725 PA |
2392 | sect_offset sect_off |
2393 | = (sect_offset) extract_unsigned_integer (bytes, 8, BFD_ENDIAN_LITTLE); | |
2394 | type_offset_in_tu | |
2395 | = (cu_offset) extract_unsigned_integer (bytes + 8, 8, | |
2396 | BFD_ENDIAN_LITTLE); | |
1fd400ff TT |
2397 | signature = extract_unsigned_integer (bytes + 16, 8, BFD_ENDIAN_LITTLE); |
2398 | bytes += 3 * 8; | |
2399 | ||
168c9250 | 2400 | sig_type = per_bfd->allocate_signatured_type (); |
52dc124a | 2401 | sig_type->signature = signature; |
9c541725 | 2402 | sig_type->type_offset_in_tu = type_offset_in_tu; |
0d305d5c TT |
2403 | sig_type->is_debug_types = 1; |
2404 | sig_type->section = section; | |
2405 | sig_type->sect_off = sect_off; | |
2406 | sig_type->v.quick | |
168c9250 | 2407 | = OBSTACK_ZALLOC (&per_bfd->obstack, |
1fd400ff TT |
2408 | struct dwarf2_per_cu_quick_data); |
2409 | ||
0d305d5c TT |
2410 | slot = htab_find_slot (sig_types_hash.get (), sig_type.get (), INSERT); |
2411 | *slot = sig_type.get (); | |
1fd400ff | 2412 | |
473ab964 | 2413 | per_bfd->all_comp_units.emplace_back (sig_type.release ()); |
1fd400ff TT |
2414 | } |
2415 | ||
168c9250 | 2416 | per_bfd->signatured_types = std::move (sig_types_hash); |
1fd400ff TT |
2417 | } |
2418 | ||
927aa2e7 JK |
2419 | /* Create the signatured type hash table from .debug_names. */ |
2420 | ||
2421 | static void | |
2422 | create_signatured_type_table_from_debug_names | |
976ca316 | 2423 | (dwarf2_per_objfile *per_objfile, |
927aa2e7 JK |
2424 | const mapped_debug_names &map, |
2425 | struct dwarf2_section_info *section, | |
2426 | struct dwarf2_section_info *abbrev_section) | |
2427 | { | |
976ca316 | 2428 | struct objfile *objfile = per_objfile->objfile; |
ed2dc618 | 2429 | |
96b79293 TT |
2430 | section->read (objfile); |
2431 | abbrev_section->read (objfile); | |
927aa2e7 | 2432 | |
298e9637 | 2433 | htab_up sig_types_hash = allocate_signatured_type_table (); |
927aa2e7 JK |
2434 | |
2435 | for (uint32_t i = 0; i < map.tu_count; ++i) | |
2436 | { | |
0d305d5c | 2437 | std::unique_ptr<signatured_type> sig_type; |
927aa2e7 | 2438 | void **slot; |
927aa2e7 JK |
2439 | |
2440 | sect_offset sect_off | |
2441 | = (sect_offset) (extract_unsigned_integer | |
2442 | (map.tu_table_reordered + i * map.offset_size, | |
2443 | map.offset_size, | |
2444 | map.dwarf5_byte_order)); | |
2445 | ||
2446 | comp_unit_head cu_header; | |
976ca316 | 2447 | read_and_check_comp_unit_head (per_objfile, &cu_header, section, |
ed2dc618 | 2448 | abbrev_section, |
927aa2e7 JK |
2449 | section->buffer + to_underlying (sect_off), |
2450 | rcuh_kind::TYPE); | |
2451 | ||
976ca316 | 2452 | sig_type = per_objfile->per_bfd->allocate_signatured_type (); |
927aa2e7 JK |
2453 | sig_type->signature = cu_header.signature; |
2454 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
0d305d5c TT |
2455 | sig_type->is_debug_types = 1; |
2456 | sig_type->section = section; | |
2457 | sig_type->sect_off = sect_off; | |
2458 | sig_type->v.quick | |
976ca316 | 2459 | = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, |
927aa2e7 JK |
2460 | struct dwarf2_per_cu_quick_data); |
2461 | ||
0d305d5c TT |
2462 | slot = htab_find_slot (sig_types_hash.get (), sig_type.get (), INSERT); |
2463 | *slot = sig_type.get (); | |
927aa2e7 | 2464 | |
473ab964 | 2465 | per_objfile->per_bfd->all_comp_units.emplace_back (sig_type.release ()); |
927aa2e7 JK |
2466 | } |
2467 | ||
976ca316 | 2468 | per_objfile->per_bfd->signatured_types = std::move (sig_types_hash); |
927aa2e7 JK |
2469 | } |
2470 | ||
9291a0cd | 2471 | /* Read the address map data from the mapped index, and use it to |
efd7398e | 2472 | populate the psymtabs_addrmap. */ |
2fdf6df6 | 2473 | |
9291a0cd | 2474 | static void |
976ca316 | 2475 | create_addrmap_from_index (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 2476 | struct mapped_index *index) |
9291a0cd | 2477 | { |
976ca316 | 2478 | struct objfile *objfile = per_objfile->objfile; |
efd7398e | 2479 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
08feed99 | 2480 | struct gdbarch *gdbarch = objfile->arch (); |
9291a0cd | 2481 | const gdb_byte *iter, *end; |
9291a0cd | 2482 | struct addrmap *mutable_map; |
9291a0cd TT |
2483 | CORE_ADDR baseaddr; |
2484 | ||
8268c778 PA |
2485 | auto_obstack temp_obstack; |
2486 | ||
9291a0cd TT |
2487 | mutable_map = addrmap_create_mutable (&temp_obstack); |
2488 | ||
f00a2de2 PA |
2489 | iter = index->address_table.data (); |
2490 | end = iter + index->address_table.size (); | |
9291a0cd | 2491 | |
b3b3bada | 2492 | baseaddr = objfile->text_section_offset (); |
9291a0cd TT |
2493 | |
2494 | while (iter < end) | |
2495 | { | |
2496 | ULONGEST hi, lo, cu_index; | |
2497 | lo = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2498 | iter += 8; | |
2499 | hi = extract_unsigned_integer (iter, 8, BFD_ENDIAN_LITTLE); | |
2500 | iter += 8; | |
2501 | cu_index = extract_unsigned_integer (iter, 4, BFD_ENDIAN_LITTLE); | |
2502 | iter += 4; | |
f652bce2 | 2503 | |
24a55014 | 2504 | if (lo > hi) |
f652bce2 | 2505 | { |
b98664d3 | 2506 | complaint (_(".gdb_index address table has invalid range (%s - %s)"), |
c0cd8254 | 2507 | hex_string (lo), hex_string (hi)); |
24a55014 | 2508 | continue; |
f652bce2 | 2509 | } |
24a55014 | 2510 | |
efd7398e | 2511 | if (cu_index >= per_bfd->all_comp_units.size ()) |
f652bce2 | 2512 | { |
b98664d3 | 2513 | complaint (_(".gdb_index address table has invalid CU number %u"), |
f652bce2 | 2514 | (unsigned) cu_index); |
24a55014 | 2515 | continue; |
f652bce2 | 2516 | } |
24a55014 | 2517 | |
79748972 TT |
2518 | lo = gdbarch_adjust_dwarf2_addr (gdbarch, lo + baseaddr) - baseaddr; |
2519 | hi = gdbarch_adjust_dwarf2_addr (gdbarch, hi + baseaddr) - baseaddr; | |
ed2dc618 | 2520 | addrmap_set_empty (mutable_map, lo, hi - 1, |
efd7398e | 2521 | per_bfd->get_cu (cu_index)); |
9291a0cd TT |
2522 | } |
2523 | ||
efd7398e TT |
2524 | per_bfd->index_addrmap = addrmap_create_fixed (mutable_map, |
2525 | &per_bfd->obstack); | |
9291a0cd TT |
2526 | } |
2527 | ||
927aa2e7 | 2528 | /* Read the address map data from DWARF-5 .debug_aranges, and use it to |
efd7398e | 2529 | populate the psymtabs_addrmap. */ |
927aa2e7 JK |
2530 | |
2531 | static void | |
976ca316 | 2532 | create_addrmap_from_aranges (dwarf2_per_objfile *per_objfile, |
927aa2e7 JK |
2533 | struct dwarf2_section_info *section) |
2534 | { | |
976ca316 | 2535 | struct objfile *objfile = per_objfile->objfile; |
927aa2e7 | 2536 | bfd *abfd = objfile->obfd; |
08feed99 | 2537 | struct gdbarch *gdbarch = objfile->arch (); |
b3b3bada | 2538 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
efd7398e | 2539 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
927aa2e7 JK |
2540 | |
2541 | auto_obstack temp_obstack; | |
2542 | addrmap *mutable_map = addrmap_create_mutable (&temp_obstack); | |
2543 | ||
2544 | std::unordered_map<sect_offset, | |
2545 | dwarf2_per_cu_data *, | |
2546 | gdb::hash_enum<sect_offset>> | |
2547 | debug_info_offset_to_per_cu; | |
0d305d5c | 2548 | for (const auto &per_cu : per_bfd->all_comp_units) |
927aa2e7 | 2549 | { |
927aa2e7 | 2550 | const auto insertpair |
0d305d5c TT |
2551 | = debug_info_offset_to_per_cu.emplace (per_cu->sect_off, |
2552 | per_cu.get ()); | |
927aa2e7 JK |
2553 | if (!insertpair.second) |
2554 | { | |
2555 | warning (_("Section .debug_aranges in %s has duplicate " | |
9d8780f0 SM |
2556 | "debug_info_offset %s, ignoring .debug_aranges."), |
2557 | objfile_name (objfile), sect_offset_str (per_cu->sect_off)); | |
927aa2e7 JK |
2558 | return; |
2559 | } | |
2560 | } | |
2561 | ||
96b79293 | 2562 | section->read (objfile); |
927aa2e7 JK |
2563 | |
2564 | const bfd_endian dwarf5_byte_order = gdbarch_byte_order (gdbarch); | |
2565 | ||
2566 | const gdb_byte *addr = section->buffer; | |
2567 | ||
2568 | while (addr < section->buffer + section->size) | |
2569 | { | |
2570 | const gdb_byte *const entry_addr = addr; | |
2571 | unsigned int bytes_read; | |
2572 | ||
2573 | const LONGEST entry_length = read_initial_length (abfd, addr, | |
2574 | &bytes_read); | |
2575 | addr += bytes_read; | |
2576 | ||
2577 | const gdb_byte *const entry_end = addr + entry_length; | |
2578 | const bool dwarf5_is_dwarf64 = bytes_read != 4; | |
2579 | const uint8_t offset_size = dwarf5_is_dwarf64 ? 8 : 4; | |
2580 | if (addr + entry_length > section->buffer + section->size) | |
2581 | { | |
47e3f474 | 2582 | warning (_("Section .debug_aranges in %s entry at offset %s " |
dda83cd7 | 2583 | "length %s exceeds section length %s, " |
927aa2e7 | 2584 | "ignoring .debug_aranges."), |
47e3f474 TV |
2585 | objfile_name (objfile), |
2586 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2587 | plongest (bytes_read + entry_length), |
2588 | pulongest (section->size)); | |
2589 | return; | |
2590 | } | |
2591 | ||
2592 | /* The version number. */ | |
2593 | const uint16_t version = read_2_bytes (abfd, addr); | |
2594 | addr += 2; | |
2595 | if (version != 2) | |
2596 | { | |
47e3f474 | 2597 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2598 | "has unsupported version %d, ignoring .debug_aranges."), |
47e3f474 TV |
2599 | objfile_name (objfile), |
2600 | plongest (entry_addr - section->buffer), version); | |
927aa2e7 JK |
2601 | return; |
2602 | } | |
2603 | ||
2604 | const uint64_t debug_info_offset | |
2605 | = extract_unsigned_integer (addr, offset_size, dwarf5_byte_order); | |
2606 | addr += offset_size; | |
2607 | const auto per_cu_it | |
2608 | = debug_info_offset_to_per_cu.find (sect_offset (debug_info_offset)); | |
2609 | if (per_cu_it == debug_info_offset_to_per_cu.cend ()) | |
2610 | { | |
47e3f474 | 2611 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2612 | "debug_info_offset %s does not exists, " |
2613 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2614 | objfile_name (objfile), |
2615 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2616 | pulongest (debug_info_offset)); |
2617 | return; | |
2618 | } | |
2619 | dwarf2_per_cu_data *const per_cu = per_cu_it->second; | |
2620 | ||
2621 | const uint8_t address_size = *addr++; | |
2622 | if (address_size < 1 || address_size > 8) | |
2623 | { | |
47e3f474 | 2624 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2625 | "address_size %u is invalid, ignoring .debug_aranges."), |
47e3f474 TV |
2626 | objfile_name (objfile), |
2627 | plongest (entry_addr - section->buffer), address_size); | |
927aa2e7 JK |
2628 | return; |
2629 | } | |
2630 | ||
2631 | const uint8_t segment_selector_size = *addr++; | |
2632 | if (segment_selector_size != 0) | |
2633 | { | |
47e3f474 | 2634 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2635 | "segment_selector_size %u is not supported, " |
2636 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2637 | objfile_name (objfile), |
2638 | plongest (entry_addr - section->buffer), | |
927aa2e7 JK |
2639 | segment_selector_size); |
2640 | return; | |
2641 | } | |
2642 | ||
2643 | /* Must pad to an alignment boundary that is twice the address | |
dda83cd7 SM |
2644 | size. It is undocumented by the DWARF standard but GCC does |
2645 | use it. */ | |
927aa2e7 JK |
2646 | for (size_t padding = ((-(addr - section->buffer)) |
2647 | & (2 * address_size - 1)); | |
dda83cd7 | 2648 | padding > 0; padding--) |
927aa2e7 JK |
2649 | if (*addr++ != 0) |
2650 | { | |
47e3f474 | 2651 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 | 2652 | "padding is not zero, ignoring .debug_aranges."), |
47e3f474 TV |
2653 | objfile_name (objfile), |
2654 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2655 | return; |
2656 | } | |
2657 | ||
2658 | for (;;) | |
2659 | { | |
2660 | if (addr + 2 * address_size > entry_end) | |
2661 | { | |
47e3f474 | 2662 | warning (_("Section .debug_aranges in %s entry at offset %s " |
927aa2e7 JK |
2663 | "address list is not properly terminated, " |
2664 | "ignoring .debug_aranges."), | |
47e3f474 TV |
2665 | objfile_name (objfile), |
2666 | plongest (entry_addr - section->buffer)); | |
927aa2e7 JK |
2667 | return; |
2668 | } | |
2669 | ULONGEST start = extract_unsigned_integer (addr, address_size, | |
2670 | dwarf5_byte_order); | |
2671 | addr += address_size; | |
2672 | ULONGEST length = extract_unsigned_integer (addr, address_size, | |
2673 | dwarf5_byte_order); | |
2674 | addr += address_size; | |
2675 | if (start == 0 && length == 0) | |
2676 | break; | |
efd7398e | 2677 | if (start == 0 && !per_bfd->has_section_at_zero) |
927aa2e7 JK |
2678 | { |
2679 | /* Symbol was eliminated due to a COMDAT group. */ | |
2680 | continue; | |
2681 | } | |
2682 | ULONGEST end = start + length; | |
79748972 TT |
2683 | start = (gdbarch_adjust_dwarf2_addr (gdbarch, start + baseaddr) |
2684 | - baseaddr); | |
2685 | end = (gdbarch_adjust_dwarf2_addr (gdbarch, end + baseaddr) | |
2686 | - baseaddr); | |
927aa2e7 JK |
2687 | addrmap_set_empty (mutable_map, start, end - 1, per_cu); |
2688 | } | |
2689 | } | |
2690 | ||
efd7398e TT |
2691 | per_bfd->index_addrmap = addrmap_create_fixed (mutable_map, |
2692 | &per_bfd->obstack); | |
927aa2e7 JK |
2693 | } |
2694 | ||
4485a1c1 SM |
2695 | /* A helper function that reads the .gdb_index from BUFFER and fills |
2696 | in MAP. FILENAME is the name of the file containing the data; | |
d33bc52e | 2697 | it is used for error reporting. DEPRECATED_OK is true if it is |
2ec9a5e0 TT |
2698 | ok to use deprecated sections. |
2699 | ||
2700 | CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are | |
2701 | out parameters that are filled in with information about the CU and | |
2702 | TU lists in the section. | |
2703 | ||
4485a1c1 | 2704 | Returns true if all went well, false otherwise. */ |
2fdf6df6 | 2705 | |
d33bc52e | 2706 | static bool |
3810f182 | 2707 | read_gdb_index_from_buffer (const char *filename, |
4485a1c1 SM |
2708 | bool deprecated_ok, |
2709 | gdb::array_view<const gdb_byte> buffer, | |
2710 | struct mapped_index *map, | |
2711 | const gdb_byte **cu_list, | |
2712 | offset_type *cu_list_elements, | |
2713 | const gdb_byte **types_list, | |
2714 | offset_type *types_list_elements) | |
2715 | { | |
2716 | const gdb_byte *addr = &buffer[0]; | |
42c2c694 | 2717 | offset_view metadata (buffer); |
82430852 | 2718 | |
9291a0cd | 2719 | /* Version check. */ |
42c2c694 | 2720 | offset_type version = metadata[0]; |
987d643c | 2721 | /* Versions earlier than 3 emitted every copy of a psymbol. This |
a6e293d1 | 2722 | causes the index to behave very poorly for certain requests. Version 3 |
831adc1f | 2723 | contained incomplete addrmap. So, it seems better to just ignore such |
481860b3 | 2724 | indices. */ |
831adc1f | 2725 | if (version < 4) |
481860b3 GB |
2726 | { |
2727 | static int warning_printed = 0; | |
2728 | if (!warning_printed) | |
2729 | { | |
2730 | warning (_("Skipping obsolete .gdb_index section in %s."), | |
2ec9a5e0 | 2731 | filename); |
481860b3 GB |
2732 | warning_printed = 1; |
2733 | } | |
2734 | return 0; | |
2735 | } | |
2736 | /* Index version 4 uses a different hash function than index version | |
2737 | 5 and later. | |
2738 | ||
2739 | Versions earlier than 6 did not emit psymbols for inlined | |
2740 | functions. Using these files will cause GDB not to be able to | |
2741 | set breakpoints on inlined functions by name, so we ignore these | |
e615022a DE |
2742 | indices unless the user has done |
2743 | "set use-deprecated-index-sections on". */ | |
2ec9a5e0 | 2744 | if (version < 6 && !deprecated_ok) |
481860b3 GB |
2745 | { |
2746 | static int warning_printed = 0; | |
2747 | if (!warning_printed) | |
2748 | { | |
e615022a DE |
2749 | warning (_("\ |
2750 | Skipping deprecated .gdb_index section in %s.\n\ | |
2751 | Do \"set use-deprecated-index-sections on\" before the file is read\n\ | |
2752 | to use the section anyway."), | |
2ec9a5e0 | 2753 | filename); |
481860b3 GB |
2754 | warning_printed = 1; |
2755 | } | |
2756 | return 0; | |
2757 | } | |
796a7ff8 | 2758 | /* Version 7 indices generated by gold refer to the CU for a symbol instead |
8943b874 DE |
2759 | of the TU (for symbols coming from TUs), |
2760 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. | |
2761 | Plus gold-generated indices can have duplicate entries for global symbols, | |
2762 | http://sourceware.org/bugzilla/show_bug.cgi?id=15646. | |
2763 | These are just performance bugs, and we can't distinguish gdb-generated | |
2764 | indices from gold-generated ones, so issue no warning here. */ | |
796a7ff8 | 2765 | |
481860b3 | 2766 | /* Indexes with higher version than the one supported by GDB may be no |
594e8718 | 2767 | longer backward compatible. */ |
796a7ff8 | 2768 | if (version > 8) |
594e8718 | 2769 | return 0; |
9291a0cd | 2770 | |
559a7a62 | 2771 | map->version = version; |
9291a0cd | 2772 | |
42c2c694 TT |
2773 | int i = 1; |
2774 | *cu_list = addr + metadata[i]; | |
2775 | *cu_list_elements = (metadata[i + 1] - metadata[i]) / 8; | |
1fd400ff TT |
2776 | ++i; |
2777 | ||
42c2c694 TT |
2778 | *types_list = addr + metadata[i]; |
2779 | *types_list_elements = (metadata[i + 1] - metadata[i]) / 8; | |
987d643c | 2780 | ++i; |
1fd400ff | 2781 | |
42c2c694 TT |
2782 | const gdb_byte *address_table = addr + metadata[i]; |
2783 | const gdb_byte *address_table_end = addr + metadata[i + 1]; | |
f00a2de2 PA |
2784 | map->address_table |
2785 | = gdb::array_view<const gdb_byte> (address_table, address_table_end); | |
1fd400ff TT |
2786 | ++i; |
2787 | ||
42c2c694 TT |
2788 | const gdb_byte *symbol_table = addr + metadata[i]; |
2789 | const gdb_byte *symbol_table_end = addr + metadata[i + 1]; | |
f00a2de2 | 2790 | map->symbol_table |
42c2c694 TT |
2791 | = offset_view (gdb::array_view<const gdb_byte> (symbol_table, |
2792 | symbol_table_end)); | |
9291a0cd | 2793 | |
f00a2de2 | 2794 | ++i; |
42c2c694 | 2795 | map->constant_pool = buffer.slice (metadata[i]); |
1fd400ff | 2796 | |
2ec9a5e0 TT |
2797 | return 1; |
2798 | } | |
2799 | ||
4485a1c1 SM |
2800 | /* Callback types for dwarf2_read_gdb_index. */ |
2801 | ||
2802 | typedef gdb::function_view | |
5989a64e | 2803 | <gdb::array_view<const gdb_byte>(objfile *, dwarf2_per_bfd *)> |
4485a1c1 SM |
2804 | get_gdb_index_contents_ftype; |
2805 | typedef gdb::function_view | |
2806 | <gdb::array_view<const gdb_byte>(objfile *, dwz_file *)> | |
2807 | get_gdb_index_contents_dwz_ftype; | |
2808 | ||
927aa2e7 | 2809 | /* Read .gdb_index. If everything went ok, initialize the "quick" |
2ec9a5e0 TT |
2810 | elements of all the CUs and return 1. Otherwise, return 0. */ |
2811 | ||
2812 | static int | |
4485a1c1 | 2813 | dwarf2_read_gdb_index |
976ca316 | 2814 | (dwarf2_per_objfile *per_objfile, |
4485a1c1 SM |
2815 | get_gdb_index_contents_ftype get_gdb_index_contents, |
2816 | get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz) | |
2ec9a5e0 | 2817 | { |
2ec9a5e0 TT |
2818 | const gdb_byte *cu_list, *types_list, *dwz_list = NULL; |
2819 | offset_type cu_list_elements, types_list_elements, dwz_list_elements = 0; | |
4db1a1dc | 2820 | struct dwz_file *dwz; |
976ca316 | 2821 | struct objfile *objfile = per_objfile->objfile; |
f8c41851 | 2822 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
2ec9a5e0 | 2823 | |
4485a1c1 | 2824 | gdb::array_view<const gdb_byte> main_index_contents |
f8c41851 | 2825 | = get_gdb_index_contents (objfile, per_bfd); |
4485a1c1 SM |
2826 | |
2827 | if (main_index_contents.empty ()) | |
2828 | return 0; | |
2829 | ||
3063847f | 2830 | std::unique_ptr<struct mapped_index> map (new struct mapped_index); |
3810f182 | 2831 | if (!read_gdb_index_from_buffer (objfile_name (objfile), |
4485a1c1 SM |
2832 | use_deprecated_index_sections, |
2833 | main_index_contents, map.get (), &cu_list, | |
2834 | &cu_list_elements, &types_list, | |
2835 | &types_list_elements)) | |
2ec9a5e0 TT |
2836 | return 0; |
2837 | ||
0fefef59 | 2838 | /* Don't use the index if it's empty. */ |
3063847f | 2839 | if (map->symbol_table.empty ()) |
0fefef59 DE |
2840 | return 0; |
2841 | ||
2ec9a5e0 TT |
2842 | /* If there is a .dwz file, read it so we can get its CU list as |
2843 | well. */ | |
f8c41851 | 2844 | dwz = dwarf2_get_dwz_file (per_bfd); |
4db1a1dc | 2845 | if (dwz != NULL) |
2ec9a5e0 | 2846 | { |
2ec9a5e0 TT |
2847 | struct mapped_index dwz_map; |
2848 | const gdb_byte *dwz_types_ignore; | |
2849 | offset_type dwz_types_elements_ignore; | |
2850 | ||
4485a1c1 SM |
2851 | gdb::array_view<const gdb_byte> dwz_index_content |
2852 | = get_gdb_index_contents_dwz (objfile, dwz); | |
2853 | ||
2854 | if (dwz_index_content.empty ()) | |
2855 | return 0; | |
2856 | ||
3810f182 | 2857 | if (!read_gdb_index_from_buffer (bfd_get_filename (dwz->dwz_bfd.get ()), |
00f93c44 | 2858 | 1, dwz_index_content, &dwz_map, |
4485a1c1 SM |
2859 | &dwz_list, &dwz_list_elements, |
2860 | &dwz_types_ignore, | |
2861 | &dwz_types_elements_ignore)) | |
2ec9a5e0 TT |
2862 | { |
2863 | warning (_("could not read '.gdb_index' section from %s; skipping"), | |
00f93c44 | 2864 | bfd_get_filename (dwz->dwz_bfd.get ())); |
2ec9a5e0 TT |
2865 | return 0; |
2866 | } | |
2867 | } | |
2868 | ||
f8c41851 SM |
2869 | create_cus_from_index (per_bfd, cu_list, cu_list_elements, dwz_list, |
2870 | dwz_list_elements); | |
1fd400ff | 2871 | |
8b70b953 TT |
2872 | if (types_list_elements) |
2873 | { | |
8b70b953 TT |
2874 | /* We can only handle a single .debug_types when we have an |
2875 | index. */ | |
f8c41851 | 2876 | if (per_bfd->types.size () != 1) |
8b70b953 TT |
2877 | return 0; |
2878 | ||
f8c41851 | 2879 | dwarf2_section_info *section = &per_bfd->types[0]; |
8b70b953 | 2880 | |
f8c41851 | 2881 | create_signatured_type_table_from_index (per_bfd, section, types_list, |
168c9250 | 2882 | types_list_elements); |
8b70b953 | 2883 | } |
9291a0cd | 2884 | |
976ca316 | 2885 | create_addrmap_from_index (per_objfile, map.get ()); |
9291a0cd | 2886 | |
f8c41851 SM |
2887 | per_bfd->index_table = std::move (map); |
2888 | per_bfd->using_index = 1; | |
2889 | per_bfd->quick_file_names_table = | |
2890 | create_quick_file_names_table (per_bfd->all_comp_units.size ()); | |
2891 | ||
9291a0cd TT |
2892 | return 1; |
2893 | } | |
2894 | ||
dee91e82 | 2895 | /* die_reader_func for dw2_get_file_names. */ |
2fdf6df6 | 2896 | |
dee91e82 DE |
2897 | static void |
2898 | dw2_get_file_names_reader (const struct die_reader_specs *reader, | |
3e225074 | 2899 | struct die_info *comp_unit_die) |
9291a0cd | 2900 | { |
dee91e82 | 2901 | struct dwarf2_cu *cu = reader->cu; |
ed2dc618 | 2902 | struct dwarf2_per_cu_data *this_cu = cu->per_cu; |
976ca316 | 2903 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
094b34ac | 2904 | struct dwarf2_per_cu_data *lh_cu; |
9291a0cd | 2905 | struct attribute *attr; |
7b9f3c50 DE |
2906 | void **slot; |
2907 | struct quick_file_names *qfn; | |
9291a0cd | 2908 | |
0186c6a7 DE |
2909 | gdb_assert (! this_cu->is_debug_types); |
2910 | ||
07261596 TT |
2911 | /* Our callers never want to match partial units -- instead they |
2912 | will match the enclosing full CU. */ | |
2913 | if (comp_unit_die->tag == DW_TAG_partial_unit) | |
2914 | { | |
2915 | this_cu->v.quick->no_file_data = 1; | |
2916 | return; | |
2917 | } | |
2918 | ||
0186c6a7 | 2919 | lh_cu = this_cu; |
7b9f3c50 | 2920 | slot = NULL; |
dee91e82 | 2921 | |
fff8551c | 2922 | line_header_up lh; |
9c541725 | 2923 | sect_offset line_offset {}; |
fff8551c | 2924 | |
dee91e82 | 2925 | attr = dwarf2_attr (comp_unit_die, DW_AT_stmt_list, cu); |
d4df075e | 2926 | if (attr != nullptr && attr->form_is_unsigned ()) |
9291a0cd | 2927 | { |
7b9f3c50 DE |
2928 | struct quick_file_names find_entry; |
2929 | ||
d4df075e | 2930 | line_offset = (sect_offset) attr->as_unsigned (); |
7b9f3c50 DE |
2931 | |
2932 | /* We may have already read in this line header (TU line header sharing). | |
2933 | If we have we're done. */ | |
094b34ac | 2934 | find_entry.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 2935 | find_entry.hash.line_sect_off = line_offset; |
976ca316 | 2936 | slot = htab_find_slot (per_objfile->per_bfd->quick_file_names_table.get (), |
7b9f3c50 DE |
2937 | &find_entry, INSERT); |
2938 | if (*slot != NULL) | |
2939 | { | |
9a3c8263 | 2940 | lh_cu->v.quick->file_names = (struct quick_file_names *) *slot; |
dee91e82 | 2941 | return; |
7b9f3c50 DE |
2942 | } |
2943 | ||
3019eac3 | 2944 | lh = dwarf_decode_line_header (line_offset, cu); |
9291a0cd TT |
2945 | } |
2946 | if (lh == NULL) | |
2947 | { | |
094b34ac | 2948 | lh_cu->v.quick->no_file_data = 1; |
dee91e82 | 2949 | return; |
9291a0cd TT |
2950 | } |
2951 | ||
976ca316 | 2952 | qfn = XOBNEW (&per_objfile->per_bfd->obstack, struct quick_file_names); |
094b34ac | 2953 | qfn->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 2954 | qfn->hash.line_sect_off = line_offset; |
7b9f3c50 DE |
2955 | gdb_assert (slot != NULL); |
2956 | *slot = qfn; | |
9291a0cd | 2957 | |
d721ba37 | 2958 | file_and_directory fnd = find_file_and_directory (comp_unit_die, cu); |
9291a0cd | 2959 | |
aa391654 TT |
2960 | int offset = 0; |
2961 | if (strcmp (fnd.name, "<unknown>") != 0) | |
2962 | ++offset; | |
2963 | ||
7ba99d21 | 2964 | qfn->num_file_names = offset + lh->file_names_size (); |
8d749320 | 2965 | qfn->file_names = |
976ca316 | 2966 | XOBNEWVEC (&per_objfile->per_bfd->obstack, const char *, |
45940949 | 2967 | qfn->num_file_names); |
aa391654 TT |
2968 | if (offset != 0) |
2969 | qfn->file_names[0] = xstrdup (fnd.name); | |
7ba99d21 | 2970 | for (int i = 0; i < lh->file_names_size (); ++i) |
03075812 TT |
2971 | qfn->file_names[i + offset] = lh->file_full_name (i + 1, |
2972 | fnd.comp_dir).release (); | |
7b9f3c50 | 2973 | qfn->real_names = NULL; |
9291a0cd | 2974 | |
094b34ac | 2975 | lh_cu->v.quick->file_names = qfn; |
dee91e82 DE |
2976 | } |
2977 | ||
2978 | /* A helper for the "quick" functions which attempts to read the line | |
2979 | table for THIS_CU. */ | |
2980 | ||
2981 | static struct quick_file_names * | |
ab432490 SM |
2982 | dw2_get_file_names (dwarf2_per_cu_data *this_cu, |
2983 | dwarf2_per_objfile *per_objfile) | |
dee91e82 | 2984 | { |
0186c6a7 DE |
2985 | /* This should never be called for TUs. */ |
2986 | gdb_assert (! this_cu->is_debug_types); | |
2987 | /* Nor type unit groups. */ | |
197400e8 | 2988 | gdb_assert (! this_cu->type_unit_group_p ()); |
f4dc4d17 | 2989 | |
dee91e82 DE |
2990 | if (this_cu->v.quick->file_names != NULL) |
2991 | return this_cu->v.quick->file_names; | |
2992 | /* If we know there is no line data, no point in looking again. */ | |
2993 | if (this_cu->v.quick->no_file_data) | |
2994 | return NULL; | |
2995 | ||
ab432490 | 2996 | cutu_reader reader (this_cu, per_objfile); |
c0ab21c2 | 2997 | if (!reader.dummy_p) |
eb5dd737 | 2998 | dw2_get_file_names_reader (&reader, reader.comp_unit_die); |
dee91e82 DE |
2999 | |
3000 | if (this_cu->v.quick->no_file_data) | |
3001 | return NULL; | |
3002 | return this_cu->v.quick->file_names; | |
9291a0cd TT |
3003 | } |
3004 | ||
3005 | /* A helper for the "quick" functions which computes and caches the | |
7b9f3c50 | 3006 | real path for a given file name from the line table. */ |
2fdf6df6 | 3007 | |
9291a0cd | 3008 | static const char * |
976ca316 | 3009 | dw2_get_real_path (dwarf2_per_objfile *per_objfile, |
7b9f3c50 | 3010 | struct quick_file_names *qfn, int index) |
9291a0cd | 3011 | { |
7b9f3c50 | 3012 | if (qfn->real_names == NULL) |
976ca316 | 3013 | qfn->real_names = OBSTACK_CALLOC (&per_objfile->per_bfd->obstack, |
26f2dc30 | 3014 | qfn->num_file_names, const char *); |
9291a0cd | 3015 | |
7b9f3c50 | 3016 | if (qfn->real_names[index] == NULL) |
14278e1f | 3017 | qfn->real_names[index] = gdb_realpath (qfn->file_names[index]).release (); |
9291a0cd | 3018 | |
7b9f3c50 | 3019 | return qfn->real_names[index]; |
9291a0cd TT |
3020 | } |
3021 | ||
39298a5d TT |
3022 | struct symtab * |
3023 | dwarf2_base_index_functions::find_last_source_symtab (struct objfile *objfile) | |
9291a0cd | 3024 | { |
976ca316 | 3025 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
0d305d5c TT |
3026 | dwarf2_per_cu_data *dwarf_cu |
3027 | = per_objfile->per_bfd->all_comp_units.back ().get (); | |
976ca316 | 3028 | compunit_symtab *cust = dw2_instantiate_symtab (dwarf_cu, per_objfile, false); |
ae2de4f8 | 3029 | |
43f3e411 DE |
3030 | if (cust == NULL) |
3031 | return NULL; | |
ed2dc618 | 3032 | |
43f3e411 | 3033 | return compunit_primary_filetab (cust); |
9291a0cd TT |
3034 | } |
3035 | ||
7b9f3c50 DE |
3036 | /* Traversal function for dw2_forget_cached_source_info. */ |
3037 | ||
3038 | static int | |
3039 | dw2_free_cached_file_names (void **slot, void *info) | |
9291a0cd | 3040 | { |
7b9f3c50 | 3041 | struct quick_file_names *file_data = (struct quick_file_names *) *slot; |
9291a0cd | 3042 | |
7b9f3c50 | 3043 | if (file_data->real_names) |
9291a0cd | 3044 | { |
7b9f3c50 | 3045 | int i; |
9291a0cd | 3046 | |
7b9f3c50 | 3047 | for (i = 0; i < file_data->num_file_names; ++i) |
9291a0cd | 3048 | { |
7b9f3c50 DE |
3049 | xfree ((void*) file_data->real_names[i]); |
3050 | file_data->real_names[i] = NULL; | |
9291a0cd TT |
3051 | } |
3052 | } | |
7b9f3c50 DE |
3053 | |
3054 | return 1; | |
3055 | } | |
3056 | ||
39298a5d TT |
3057 | void |
3058 | dwarf2_base_index_functions::forget_cached_source_info | |
3059 | (struct objfile *objfile) | |
7b9f3c50 | 3060 | { |
976ca316 | 3061 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
7b9f3c50 | 3062 | |
976ca316 | 3063 | htab_traverse_noresize (per_objfile->per_bfd->quick_file_names_table.get (), |
7b9f3c50 | 3064 | dw2_free_cached_file_names, NULL); |
9291a0cd TT |
3065 | } |
3066 | ||
da51c347 DE |
3067 | /* Struct used to manage iterating over all CUs looking for a symbol. */ |
3068 | ||
3069 | struct dw2_symtab_iterator | |
9291a0cd | 3070 | { |
ed2dc618 | 3071 | /* The dwarf2_per_objfile owning the CUs we are iterating on. */ |
976ca316 | 3072 | dwarf2_per_objfile *per_objfile; |
2b79f376 SM |
3073 | /* If set, only look for symbols that match that block. Valid values are |
3074 | GLOBAL_BLOCK and STATIC_BLOCK. */ | |
c7f839cb | 3075 | gdb::optional<block_enum> block_index; |
da51c347 DE |
3076 | /* The kind of symbol we're looking for. */ |
3077 | domain_enum domain; | |
3078 | /* The list of CUs from the index entry of the symbol, | |
3079 | or NULL if not found. */ | |
42c2c694 | 3080 | offset_view vec; |
da51c347 DE |
3081 | /* The next element in VEC to look at. */ |
3082 | int next; | |
3083 | /* The number of elements in VEC, or zero if there is no match. */ | |
3084 | int length; | |
8943b874 DE |
3085 | /* Have we seen a global version of the symbol? |
3086 | If so we can ignore all further global instances. | |
3087 | This is to work around gold/15646, inefficient gold-generated | |
3088 | indices. */ | |
3089 | int global_seen; | |
da51c347 | 3090 | }; |
9291a0cd | 3091 | |
7089bd88 | 3092 | /* Initialize the index symtab iterator ITER, offset_type NAMEI variant. */ |
2fdf6df6 | 3093 | |
9291a0cd | 3094 | static void |
7089bd88 TT |
3095 | dw2_symtab_iter_init (struct dw2_symtab_iterator *iter, |
3096 | dwarf2_per_objfile *per_objfile, | |
3097 | gdb::optional<block_enum> block_index, | |
3098 | domain_enum domain, offset_type namei) | |
da51c347 | 3099 | { |
976ca316 | 3100 | iter->per_objfile = per_objfile; |
da51c347 DE |
3101 | iter->block_index = block_index; |
3102 | iter->domain = domain; | |
3103 | iter->next = 0; | |
8943b874 | 3104 | iter->global_seen = 0; |
42c2c694 | 3105 | iter->vec = {}; |
e5f3ece2 | 3106 | iter->length = 0; |
e5f3ece2 TV |
3107 | |
3108 | mapped_index *index = per_objfile->per_bfd->index_table.get (); | |
3109 | /* index is NULL if OBJF_READNOW. */ | |
3110 | if (index == NULL) | |
3111 | return; | |
3112 | ||
3113 | gdb_assert (!index->symbol_name_slot_invalid (namei)); | |
42c2c694 | 3114 | offset_type vec_idx = index->symbol_vec_index (namei); |
e5f3ece2 | 3115 | |
42c2c694 TT |
3116 | iter->vec = offset_view (index->constant_pool.slice (vec_idx)); |
3117 | iter->length = iter->vec[0]; | |
da51c347 DE |
3118 | } |
3119 | ||
3120 | /* Return the next matching CU or NULL if there are no more. */ | |
3121 | ||
3122 | static struct dwarf2_per_cu_data * | |
3123 | dw2_symtab_iter_next (struct dw2_symtab_iterator *iter) | |
3124 | { | |
976ca316 | 3125 | dwarf2_per_objfile *per_objfile = iter->per_objfile; |
ed2dc618 | 3126 | |
da51c347 DE |
3127 | for ( ; iter->next < iter->length; ++iter->next) |
3128 | { | |
42c2c694 | 3129 | offset_type cu_index_and_attrs = iter->vec[iter->next + 1]; |
da51c347 | 3130 | offset_type cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); |
da51c347 DE |
3131 | gdb_index_symbol_kind symbol_kind = |
3132 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
3133 | /* Only check the symbol attributes if they're present. | |
3134 | Indices prior to version 7 don't record them, | |
3135 | and indices >= 7 may elide them for certain symbols | |
3136 | (gold does this). */ | |
3137 | int attrs_valid = | |
976ca316 | 3138 | (per_objfile->per_bfd->index_table->version >= 7 |
da51c347 DE |
3139 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); |
3140 | ||
3190f0c6 | 3141 | /* Don't crash on bad data. */ |
91eea9cc | 3142 | if (cu_index >= per_objfile->per_bfd->all_comp_units.size ()) |
3190f0c6 | 3143 | { |
b98664d3 | 3144 | complaint (_(".gdb_index entry has bad CU index" |
976ca316 | 3145 | " [in module %s]"), objfile_name (per_objfile->objfile)); |
3190f0c6 DE |
3146 | continue; |
3147 | } | |
3148 | ||
91eea9cc | 3149 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (cu_index); |
3190f0c6 | 3150 | |
da51c347 | 3151 | /* Skip if already read in. */ |
976ca316 | 3152 | if (per_objfile->symtab_set_p (per_cu)) |
da51c347 DE |
3153 | continue; |
3154 | ||
8943b874 DE |
3155 | /* Check static vs global. */ |
3156 | if (attrs_valid) | |
3157 | { | |
2b79f376 SM |
3158 | bool is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); |
3159 | ||
3160 | if (iter->block_index.has_value ()) | |
3161 | { | |
3162 | bool want_static = *iter->block_index == STATIC_BLOCK; | |
3163 | ||
3164 | if (is_static != want_static) | |
3165 | continue; | |
3166 | } | |
3167 | ||
8943b874 | 3168 | /* Work around gold/15646. */ |
f030440d TV |
3169 | if (!is_static |
3170 | && symbol_kind == GDB_INDEX_SYMBOL_KIND_TYPE) | |
3171 | { | |
3172 | if (iter->global_seen) | |
3173 | continue; | |
3174 | ||
3175 | iter->global_seen = 1; | |
3176 | } | |
8943b874 | 3177 | } |
da51c347 DE |
3178 | |
3179 | /* Only check the symbol's kind if it has one. */ | |
3180 | if (attrs_valid) | |
3181 | { | |
3182 | switch (iter->domain) | |
3183 | { | |
3184 | case VAR_DOMAIN: | |
3185 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE | |
3186 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION | |
3187 | /* Some types are also in VAR_DOMAIN. */ | |
3188 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3189 | continue; | |
3190 | break; | |
3191 | case STRUCT_DOMAIN: | |
3192 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
3193 | continue; | |
3194 | break; | |
3195 | case LABEL_DOMAIN: | |
3196 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3197 | continue; | |
3198 | break; | |
59c35742 AB |
3199 | case MODULE_DOMAIN: |
3200 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
3201 | continue; | |
3202 | break; | |
da51c347 DE |
3203 | default: |
3204 | break; | |
3205 | } | |
3206 | } | |
3207 | ||
3208 | ++iter->next; | |
3209 | return per_cu; | |
3210 | } | |
3211 | ||
3212 | return NULL; | |
3213 | } | |
3214 | ||
39298a5d | 3215 | void |
4829711b TT |
3216 | dwarf2_base_index_functions::print_stats (struct objfile *objfile, |
3217 | bool print_bcache) | |
9291a0cd | 3218 | { |
4829711b TT |
3219 | if (print_bcache) |
3220 | return; | |
3221 | ||
976ca316 | 3222 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
91eea9cc | 3223 | int total = per_objfile->per_bfd->all_comp_units.size (); |
ed2dc618 | 3224 | int count = 0; |
9291a0cd | 3225 | |
ed2dc618 | 3226 | for (int i = 0; i < total; ++i) |
9291a0cd | 3227 | { |
91eea9cc | 3228 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (i); |
9291a0cd | 3229 | |
976ca316 | 3230 | if (!per_objfile->symtab_set_p (per_cu)) |
9291a0cd TT |
3231 | ++count; |
3232 | } | |
e4a48d9d | 3233 | printf_filtered (_(" Number of read CUs: %d\n"), total - count); |
9291a0cd TT |
3234 | printf_filtered (_(" Number of unread CUs: %d\n"), count); |
3235 | } | |
3236 | ||
779bd270 DE |
3237 | /* This dumps minimal information about the index. |
3238 | It is called via "mt print objfiles". | |
3239 | One use is to verify .gdb_index has been loaded by the | |
3240 | gdb.dwarf2/gdb-index.exp testcase. */ | |
3241 | ||
39298a5d TT |
3242 | void |
3243 | dwarf2_gdb_index::dump (struct objfile *objfile) | |
9291a0cd | 3244 | { |
976ca316 | 3245 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 3246 | |
976ca316 | 3247 | gdb_assert (per_objfile->per_bfd->using_index); |
779bd270 | 3248 | printf_filtered (".gdb_index:"); |
976ca316 | 3249 | if (per_objfile->per_bfd->index_table != NULL) |
779bd270 DE |
3250 | { |
3251 | printf_filtered (" version %d\n", | |
976ca316 | 3252 | per_objfile->per_bfd->index_table->version); |
779bd270 DE |
3253 | } |
3254 | else | |
3255 | printf_filtered (" faked for \"readnow\"\n"); | |
3256 | printf_filtered ("\n"); | |
9291a0cd TT |
3257 | } |
3258 | ||
39298a5d TT |
3259 | void |
3260 | dwarf2_base_index_functions::expand_all_symtabs (struct objfile *objfile) | |
9291a0cd | 3261 | { |
976ca316 | 3262 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
91eea9cc | 3263 | int total_units = per_objfile->per_bfd->all_comp_units.size (); |
9291a0cd | 3264 | |
ed2dc618 | 3265 | for (int i = 0; i < total_units; ++i) |
9291a0cd | 3266 | { |
91eea9cc | 3267 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (i); |
9291a0cd | 3268 | |
58f0c718 TT |
3269 | /* We don't want to directly expand a partial CU, because if we |
3270 | read it with the wrong language, then assertion failures can | |
3271 | be triggered later on. See PR symtab/23010. So, tell | |
3272 | dw2_instantiate_symtab to skip partial CUs -- any important | |
3273 | partial CU will be read via DW_TAG_imported_unit anyway. */ | |
976ca316 | 3274 | dw2_instantiate_symtab (per_cu, per_objfile, true); |
9291a0cd TT |
3275 | } |
3276 | } | |
3277 | ||
df35e626 | 3278 | static bool |
9a0bacfb TV |
3279 | dw2_expand_symtabs_matching_symbol |
3280 | (mapped_index_base &index, | |
3281 | const lookup_name_info &lookup_name_in, | |
3282 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
fcf23d5b SM |
3283 | gdb::function_view<bool (offset_type)> match_callback, |
3284 | dwarf2_per_objfile *per_objfile); | |
9a0bacfb | 3285 | |
df35e626 | 3286 | static bool |
9a0bacfb | 3287 | dw2_expand_symtabs_matching_one |
97a1449a SM |
3288 | (dwarf2_per_cu_data *per_cu, |
3289 | dwarf2_per_objfile *per_objfile, | |
9a0bacfb TV |
3290 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
3291 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify); | |
3292 | ||
af82f89d | 3293 | void |
0b7b2c2a | 3294 | dwarf2_gdb_index::expand_matching_symbols |
199b4314 | 3295 | (struct objfile *objfile, |
b054970d | 3296 | const lookup_name_info &name, domain_enum domain, |
199b4314 | 3297 | int global, |
199b4314 | 3298 | symbol_compare_ftype *ordered_compare) |
9291a0cd | 3299 | { |
1aa98955 | 3300 | /* Used for Ada. */ |
976ca316 | 3301 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
1aa98955 | 3302 | |
9a0bacfb TV |
3303 | const block_enum block_kind = global ? GLOBAL_BLOCK : STATIC_BLOCK; |
3304 | ||
976ca316 | 3305 | if (per_objfile->per_bfd->index_table != nullptr) |
1aa98955 | 3306 | { |
976ca316 | 3307 | mapped_index &index = *per_objfile->per_bfd->index_table; |
1aa98955 | 3308 | |
9a0bacfb TV |
3309 | const char *match_name = name.ada ().lookup_name ().c_str (); |
3310 | auto matcher = [&] (const char *symname) | |
3311 | { | |
3312 | if (ordered_compare == nullptr) | |
3313 | return true; | |
3314 | return ordered_compare (symname, match_name) == 0; | |
3315 | }; | |
3316 | ||
b64f703b | 3317 | dw2_expand_symtabs_matching_symbol (index, name, matcher, |
9a0bacfb TV |
3318 | [&] (offset_type namei) |
3319 | { | |
3320 | struct dw2_symtab_iterator iter; | |
3321 | struct dwarf2_per_cu_data *per_cu; | |
3322 | ||
976ca316 | 3323 | dw2_symtab_iter_init (&iter, per_objfile, block_kind, domain, |
e5f3ece2 | 3324 | namei); |
9a0bacfb | 3325 | while ((per_cu = dw2_symtab_iter_next (&iter)) != NULL) |
976ca316 | 3326 | dw2_expand_symtabs_matching_one (per_cu, per_objfile, nullptr, |
97a1449a | 3327 | nullptr); |
9a0bacfb | 3328 | return true; |
976ca316 | 3329 | }, per_objfile); |
9a0bacfb TV |
3330 | } |
3331 | else | |
3332 | { | |
3333 | /* We have -readnow: no .gdb_index, but no partial symtabs either. So, | |
3334 | proceed assuming all symtabs have been read in. */ | |
3335 | } | |
9291a0cd TT |
3336 | } |
3337 | ||
e1ef7d7a PA |
3338 | /* Starting from a search name, return the string that finds the upper |
3339 | bound of all strings that start with SEARCH_NAME in a sorted name | |
3340 | list. Returns the empty string to indicate that the upper bound is | |
3341 | the end of the list. */ | |
3342 | ||
3343 | static std::string | |
3344 | make_sort_after_prefix_name (const char *search_name) | |
3345 | { | |
3346 | /* When looking to complete "func", we find the upper bound of all | |
3347 | symbols that start with "func" by looking for where we'd insert | |
3348 | the closest string that would follow "func" in lexicographical | |
3349 | order. Usually, that's "func"-with-last-character-incremented, | |
3350 | i.e. "fund". Mind non-ASCII characters, though. Usually those | |
3351 | will be UTF-8 multi-byte sequences, but we can't be certain. | |
3352 | Especially mind the 0xff character, which is a valid character in | |
3353 | non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't | |
3354 | rule out compilers allowing it in identifiers. Note that | |
3355 | conveniently, strcmp/strcasecmp are specified to compare | |
3356 | characters interpreted as unsigned char. So what we do is treat | |
3357 | the whole string as a base 256 number composed of a sequence of | |
3358 | base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps | |
3359 | to 0, and carries 1 to the following more-significant position. | |
3360 | If the very first character in SEARCH_NAME ends up incremented | |
3361 | and carries/overflows, then the upper bound is the end of the | |
3362 | list. The string after the empty string is also the empty | |
3363 | string. | |
3364 | ||
3365 | Some examples of this operation: | |
3366 | ||
3367 | SEARCH_NAME => "+1" RESULT | |
3368 | ||
3369 | "abc" => "abd" | |
3370 | "ab\xff" => "ac" | |
3371 | "\xff" "a" "\xff" => "\xff" "b" | |
3372 | "\xff" => "" | |
3373 | "\xff\xff" => "" | |
3374 | "" => "" | |
3375 | ||
3376 | Then, with these symbols for example: | |
3377 | ||
3378 | func | |
3379 | func1 | |
3380 | fund | |
3381 | ||
3382 | completing "func" looks for symbols between "func" and | |
3383 | "func"-with-last-character-incremented, i.e. "fund" (exclusive), | |
3384 | which finds "func" and "func1", but not "fund". | |
3385 | ||
3386 | And with: | |
3387 | ||
3388 | funcÿ (Latin1 'ÿ' [0xff]) | |
3389 | funcÿ1 | |
3390 | fund | |
3391 | ||
3392 | completing "funcÿ" looks for symbols between "funcÿ" and "fund" | |
3393 | (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund". | |
3394 | ||
3395 | And with: | |
3396 | ||
3397 | ÿÿ (Latin1 'ÿ' [0xff]) | |
3398 | ÿÿ1 | |
3399 | ||
3400 | completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and | |
3401 | the end of the list. | |
3402 | */ | |
3403 | std::string after = search_name; | |
3404 | while (!after.empty () && (unsigned char) after.back () == 0xff) | |
3405 | after.pop_back (); | |
3406 | if (!after.empty ()) | |
3407 | after.back () = (unsigned char) after.back () + 1; | |
3408 | return after; | |
3409 | } | |
3410 | ||
5c58de74 | 3411 | /* See declaration. */ |
61d96d7e | 3412 | |
5c58de74 PA |
3413 | std::pair<std::vector<name_component>::const_iterator, |
3414 | std::vector<name_component>::const_iterator> | |
44ed8f3e | 3415 | mapped_index_base::find_name_components_bounds |
fcf23d5b SM |
3416 | (const lookup_name_info &lookup_name_without_params, language lang, |
3417 | dwarf2_per_objfile *per_objfile) const | |
3f563c84 | 3418 | { |
5c58de74 PA |
3419 | auto *name_cmp |
3420 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3f563c84 | 3421 | |
3b00ef10 | 3422 | const char *lang_name |
e0802d59 | 3423 | = lookup_name_without_params.language_lookup_name (lang); |
9291a0cd | 3424 | |
3f563c84 PA |
3425 | /* Comparison function object for lower_bound that matches against a |
3426 | given symbol name. */ | |
3427 | auto lookup_compare_lower = [&] (const name_component &elem, | |
3428 | const char *name) | |
3429 | { | |
fcf23d5b | 3430 | const char *elem_qualified = this->symbol_name_at (elem.idx, per_objfile); |
3f563c84 PA |
3431 | const char *elem_name = elem_qualified + elem.name_offset; |
3432 | return name_cmp (elem_name, name) < 0; | |
3433 | }; | |
3434 | ||
3435 | /* Comparison function object for upper_bound that matches against a | |
3436 | given symbol name. */ | |
3437 | auto lookup_compare_upper = [&] (const char *name, | |
3438 | const name_component &elem) | |
3439 | { | |
fcf23d5b | 3440 | const char *elem_qualified = this->symbol_name_at (elem.idx, per_objfile); |
3f563c84 PA |
3441 | const char *elem_name = elem_qualified + elem.name_offset; |
3442 | return name_cmp (name, elem_name) < 0; | |
3443 | }; | |
3444 | ||
5c58de74 PA |
3445 | auto begin = this->name_components.begin (); |
3446 | auto end = this->name_components.end (); | |
3f563c84 PA |
3447 | |
3448 | /* Find the lower bound. */ | |
3449 | auto lower = [&] () | |
3450 | { | |
3b00ef10 | 3451 | if (lookup_name_without_params.completion_mode () && lang_name[0] == '\0') |
3f563c84 PA |
3452 | return begin; |
3453 | else | |
3b00ef10 | 3454 | return std::lower_bound (begin, end, lang_name, lookup_compare_lower); |
3f563c84 PA |
3455 | } (); |
3456 | ||
3457 | /* Find the upper bound. */ | |
3458 | auto upper = [&] () | |
3459 | { | |
5c58de74 | 3460 | if (lookup_name_without_params.completion_mode ()) |
3f563c84 | 3461 | { |
e1ef7d7a PA |
3462 | /* In completion mode, we want UPPER to point past all |
3463 | symbols names that have the same prefix. I.e., with | |
3464 | these symbols, and completing "func": | |
3465 | ||
3466 | function << lower bound | |
3467 | function1 | |
3468 | other_function << upper bound | |
3469 | ||
3470 | We find the upper bound by looking for the insertion | |
3471 | point of "func"-with-last-character-incremented, | |
3472 | i.e. "fund". */ | |
3b00ef10 | 3473 | std::string after = make_sort_after_prefix_name (lang_name); |
e1ef7d7a | 3474 | if (after.empty ()) |
3f563c84 | 3475 | return end; |
e6b2f5ef PA |
3476 | return std::lower_bound (lower, end, after.c_str (), |
3477 | lookup_compare_lower); | |
3f563c84 PA |
3478 | } |
3479 | else | |
3b00ef10 | 3480 | return std::upper_bound (lower, end, lang_name, lookup_compare_upper); |
3f563c84 PA |
3481 | } (); |
3482 | ||
5c58de74 PA |
3483 | return {lower, upper}; |
3484 | } | |
3485 | ||
3486 | /* See declaration. */ | |
3487 | ||
3488 | void | |
fcf23d5b | 3489 | mapped_index_base::build_name_components (dwarf2_per_objfile *per_objfile) |
5c58de74 PA |
3490 | { |
3491 | if (!this->name_components.empty ()) | |
3492 | return; | |
3493 | ||
3494 | this->name_components_casing = case_sensitivity; | |
3495 | auto *name_cmp | |
3496 | = this->name_components_casing == case_sensitive_on ? strcmp : strcasecmp; | |
3497 | ||
3498 | /* The code below only knows how to break apart components of C++ | |
3499 | symbol names (and other languages that use '::' as | |
3b00ef10 | 3500 | namespace/module separator) and Ada symbol names. */ |
44ed8f3e PA |
3501 | auto count = this->symbol_name_count (); |
3502 | for (offset_type idx = 0; idx < count; idx++) | |
5c58de74 | 3503 | { |
44ed8f3e | 3504 | if (this->symbol_name_slot_invalid (idx)) |
5c58de74 PA |
3505 | continue; |
3506 | ||
fcf23d5b | 3507 | const char *name = this->symbol_name_at (idx, per_objfile); |
5c58de74 PA |
3508 | |
3509 | /* Add each name component to the name component table. */ | |
3510 | unsigned int previous_len = 0; | |
3b00ef10 TT |
3511 | |
3512 | if (strstr (name, "::") != nullptr) | |
3513 | { | |
3514 | for (unsigned int current_len = cp_find_first_component (name); | |
3515 | name[current_len] != '\0'; | |
3516 | current_len += cp_find_first_component (name + current_len)) | |
3517 | { | |
3518 | gdb_assert (name[current_len] == ':'); | |
3519 | this->name_components.push_back ({previous_len, idx}); | |
3520 | /* Skip the '::'. */ | |
3521 | current_len += 2; | |
3522 | previous_len = current_len; | |
3523 | } | |
3524 | } | |
3525 | else | |
5c58de74 | 3526 | { |
3b00ef10 TT |
3527 | /* Handle the Ada encoded (aka mangled) form here. */ |
3528 | for (const char *iter = strstr (name, "__"); | |
3529 | iter != nullptr; | |
3530 | iter = strstr (iter, "__")) | |
3531 | { | |
3532 | this->name_components.push_back ({previous_len, idx}); | |
3533 | iter += 2; | |
3534 | previous_len = iter - name; | |
3535 | } | |
5c58de74 | 3536 | } |
3b00ef10 | 3537 | |
5c58de74 PA |
3538 | this->name_components.push_back ({previous_len, idx}); |
3539 | } | |
3540 | ||
3541 | /* Sort name_components elements by name. */ | |
3542 | auto name_comp_compare = [&] (const name_component &left, | |
3543 | const name_component &right) | |
3544 | { | |
fcf23d5b SM |
3545 | const char *left_qualified |
3546 | = this->symbol_name_at (left.idx, per_objfile); | |
3547 | const char *right_qualified | |
3548 | = this->symbol_name_at (right.idx, per_objfile); | |
5c58de74 PA |
3549 | |
3550 | const char *left_name = left_qualified + left.name_offset; | |
3551 | const char *right_name = right_qualified + right.name_offset; | |
3552 | ||
3553 | return name_cmp (left_name, right_name) < 0; | |
3554 | }; | |
3555 | ||
3556 | std::sort (this->name_components.begin (), | |
3557 | this->name_components.end (), | |
3558 | name_comp_compare); | |
3559 | } | |
3560 | ||
3561 | /* Helper for dw2_expand_symtabs_matching that works with a | |
44ed8f3e PA |
3562 | mapped_index_base instead of the containing objfile. This is split |
3563 | to a separate function in order to be able to unit test the | |
3564 | name_components matching using a mock mapped_index_base. For each | |
5c58de74 | 3565 | symbol name that matches, calls MATCH_CALLBACK, passing it the |
44ed8f3e | 3566 | symbol's index in the mapped_index_base symbol table. */ |
5c58de74 | 3567 | |
df35e626 | 3568 | static bool |
5c58de74 | 3569 | dw2_expand_symtabs_matching_symbol |
44ed8f3e | 3570 | (mapped_index_base &index, |
5c58de74 PA |
3571 | const lookup_name_info &lookup_name_in, |
3572 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
fcf23d5b SM |
3573 | gdb::function_view<bool (offset_type)> match_callback, |
3574 | dwarf2_per_objfile *per_objfile) | |
5c58de74 PA |
3575 | { |
3576 | lookup_name_info lookup_name_without_params | |
3577 | = lookup_name_in.make_ignore_params (); | |
5c58de74 PA |
3578 | |
3579 | /* Build the symbol name component sorted vector, if we haven't | |
3580 | yet. */ | |
fcf23d5b | 3581 | index.build_name_components (per_objfile); |
5c58de74 | 3582 | |
3f563c84 PA |
3583 | /* The same symbol may appear more than once in the range though. |
3584 | E.g., if we're looking for symbols that complete "w", and we have | |
3585 | a symbol named "w1::w2", we'll find the two name components for | |
3586 | that same symbol in the range. To be sure we only call the | |
3587 | callback once per symbol, we first collect the symbol name | |
3588 | indexes that matched in a temporary vector and ignore | |
3589 | duplicates. */ | |
3590 | std::vector<offset_type> matches; | |
3f563c84 | 3591 | |
3b00ef10 TT |
3592 | struct name_and_matcher |
3593 | { | |
3594 | symbol_name_matcher_ftype *matcher; | |
ecc6c606 | 3595 | const char *name; |
3b00ef10 TT |
3596 | |
3597 | bool operator== (const name_and_matcher &other) const | |
3f563c84 | 3598 | { |
ecc6c606 | 3599 | return matcher == other.matcher && strcmp (name, other.name) == 0; |
3b00ef10 TT |
3600 | } |
3601 | }; | |
3602 | ||
3603 | /* A vector holding all the different symbol name matchers, for all | |
3604 | languages. */ | |
3605 | std::vector<name_and_matcher> matchers; | |
3606 | ||
3607 | for (int i = 0; i < nr_languages; i++) | |
3608 | { | |
3609 | enum language lang_e = (enum language) i; | |
3610 | ||
3611 | const language_defn *lang = language_def (lang_e); | |
3612 | symbol_name_matcher_ftype *name_matcher | |
c9debfb9 | 3613 | = lang->get_symbol_name_matcher (lookup_name_without_params); |
3f563c84 | 3614 | |
3b00ef10 | 3615 | name_and_matcher key { |
dda83cd7 | 3616 | name_matcher, |
3b00ef10 TT |
3617 | lookup_name_without_params.language_lookup_name (lang_e) |
3618 | }; | |
3619 | ||
3620 | /* Don't insert the same comparison routine more than once. | |
3621 | Note that we do this linear walk. This is not a problem in | |
3622 | practice because the number of supported languages is | |
3623 | low. */ | |
3624 | if (std::find (matchers.begin (), matchers.end (), key) | |
3625 | != matchers.end ()) | |
9291a0cd | 3626 | continue; |
3b00ef10 TT |
3627 | matchers.push_back (std::move (key)); |
3628 | ||
3629 | auto bounds | |
3630 | = index.find_name_components_bounds (lookup_name_without_params, | |
fcf23d5b | 3631 | lang_e, per_objfile); |
3b00ef10 TT |
3632 | |
3633 | /* Now for each symbol name in range, check to see if we have a name | |
3634 | match, and if so, call the MATCH_CALLBACK callback. */ | |
3635 | ||
3636 | for (; bounds.first != bounds.second; ++bounds.first) | |
3637 | { | |
fcf23d5b SM |
3638 | const char *qualified |
3639 | = index.symbol_name_at (bounds.first->idx, per_objfile); | |
3b00ef10 TT |
3640 | |
3641 | if (!name_matcher (qualified, lookup_name_without_params, NULL) | |
3642 | || (symbol_matcher != NULL && !symbol_matcher (qualified))) | |
3643 | continue; | |
9291a0cd | 3644 | |
3b00ef10 TT |
3645 | matches.push_back (bounds.first->idx); |
3646 | } | |
3f563c84 PA |
3647 | } |
3648 | ||
3649 | std::sort (matches.begin (), matches.end ()); | |
3650 | ||
3651 | /* Finally call the callback, once per match. */ | |
3652 | ULONGEST prev = -1; | |
df35e626 | 3653 | bool result = true; |
3f563c84 PA |
3654 | for (offset_type idx : matches) |
3655 | { | |
3656 | if (prev != idx) | |
3657 | { | |
3b00ef10 | 3658 | if (!match_callback (idx)) |
df35e626 TT |
3659 | { |
3660 | result = false; | |
3661 | break; | |
3662 | } | |
3f563c84 PA |
3663 | prev = idx; |
3664 | } | |
3665 | } | |
3666 | ||
3667 | /* Above we use a type wider than idx's for 'prev', since 0 and | |
3668 | (offset_type)-1 are both possible values. */ | |
3669 | static_assert (sizeof (prev) > sizeof (offset_type), ""); | |
df35e626 TT |
3670 | |
3671 | return result; | |
3f563c84 PA |
3672 | } |
3673 | ||
c62446b1 PA |
3674 | #if GDB_SELF_TEST |
3675 | ||
3676 | namespace selftests { namespace dw2_expand_symtabs_matching { | |
3677 | ||
a3c5fafd PA |
3678 | /* A mock .gdb_index/.debug_names-like name index table, enough to |
3679 | exercise dw2_expand_symtabs_matching_symbol, which works with the | |
3680 | mapped_index_base interface. Builds an index from the symbol list | |
3681 | passed as parameter to the constructor. */ | |
3682 | class mock_mapped_index : public mapped_index_base | |
c62446b1 PA |
3683 | { |
3684 | public: | |
a3c5fafd PA |
3685 | mock_mapped_index (gdb::array_view<const char *> symbols) |
3686 | : m_symbol_table (symbols) | |
c62446b1 PA |
3687 | {} |
3688 | ||
a3c5fafd | 3689 | DISABLE_COPY_AND_ASSIGN (mock_mapped_index); |
c62446b1 | 3690 | |
a3c5fafd | 3691 | /* Return the number of names in the symbol table. */ |
632e107b | 3692 | size_t symbol_name_count () const override |
c62446b1 | 3693 | { |
a3c5fafd | 3694 | return m_symbol_table.size (); |
c62446b1 PA |
3695 | } |
3696 | ||
a3c5fafd | 3697 | /* Get the name of the symbol at IDX in the symbol table. */ |
fcf23d5b SM |
3698 | const char *symbol_name_at |
3699 | (offset_type idx, dwarf2_per_objfile *per_objfile) const override | |
a3c5fafd PA |
3700 | { |
3701 | return m_symbol_table[idx]; | |
3702 | } | |
c62446b1 | 3703 | |
a3c5fafd PA |
3704 | private: |
3705 | gdb::array_view<const char *> m_symbol_table; | |
c62446b1 PA |
3706 | }; |
3707 | ||
3708 | /* Convenience function that converts a NULL pointer to a "<null>" | |
3709 | string, to pass to print routines. */ | |
3710 | ||
3711 | static const char * | |
3712 | string_or_null (const char *str) | |
3713 | { | |
3714 | return str != NULL ? str : "<null>"; | |
3715 | } | |
3716 | ||
3717 | /* Check if a lookup_name_info built from | |
3718 | NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock | |
3719 | index. EXPECTED_LIST is the list of expected matches, in expected | |
3720 | matching order. If no match expected, then an empty list is | |
3721 | specified. Returns true on success. On failure prints a warning | |
3722 | indicating the file:line that failed, and returns false. */ | |
3723 | ||
3724 | static bool | |
3725 | check_match (const char *file, int line, | |
3726 | mock_mapped_index &mock_index, | |
3727 | const char *name, symbol_name_match_type match_type, | |
3728 | bool completion_mode, | |
fcf23d5b SM |
3729 | std::initializer_list<const char *> expected_list, |
3730 | dwarf2_per_objfile *per_objfile) | |
c62446b1 PA |
3731 | { |
3732 | lookup_name_info lookup_name (name, match_type, completion_mode); | |
3733 | ||
3734 | bool matched = true; | |
3735 | ||
3736 | auto mismatch = [&] (const char *expected_str, | |
3737 | const char *got) | |
3738 | { | |
3739 | warning (_("%s:%d: match_type=%s, looking-for=\"%s\", " | |
3740 | "expected=\"%s\", got=\"%s\"\n"), | |
3741 | file, line, | |
3742 | (match_type == symbol_name_match_type::FULL | |
3743 | ? "FULL" : "WILD"), | |
3744 | name, string_or_null (expected_str), string_or_null (got)); | |
3745 | matched = false; | |
3746 | }; | |
3747 | ||
3748 | auto expected_it = expected_list.begin (); | |
3749 | auto expected_end = expected_list.end (); | |
3750 | ||
a3c5fafd | 3751 | dw2_expand_symtabs_matching_symbol (mock_index, lookup_name, |
b64f703b | 3752 | nullptr, |
c62446b1 PA |
3753 | [&] (offset_type idx) |
3754 | { | |
fcf23d5b | 3755 | const char *matched_name = mock_index.symbol_name_at (idx, per_objfile); |
c62446b1 PA |
3756 | const char *expected_str |
3757 | = expected_it == expected_end ? NULL : *expected_it++; | |
3758 | ||
3759 | if (expected_str == NULL || strcmp (expected_str, matched_name) != 0) | |
3760 | mismatch (expected_str, matched_name); | |
3b00ef10 | 3761 | return true; |
fcf23d5b | 3762 | }, per_objfile); |
c62446b1 PA |
3763 | |
3764 | const char *expected_str | |
3765 | = expected_it == expected_end ? NULL : *expected_it++; | |
3766 | if (expected_str != NULL) | |
3767 | mismatch (expected_str, NULL); | |
3768 | ||
3769 | return matched; | |
3770 | } | |
3771 | ||
3772 | /* The symbols added to the mock mapped_index for testing (in | |
3773 | canonical form). */ | |
3774 | static const char *test_symbols[] = { | |
3775 | "function", | |
3776 | "std::bar", | |
3777 | "std::zfunction", | |
3778 | "std::zfunction2", | |
3779 | "w1::w2", | |
3780 | "ns::foo<char*>", | |
3781 | "ns::foo<int>", | |
3782 | "ns::foo<long>", | |
a20714ff PA |
3783 | "ns2::tmpl<int>::foo2", |
3784 | "(anonymous namespace)::A::B::C", | |
c62446b1 | 3785 | |
e1ef7d7a PA |
3786 | /* These are used to check that the increment-last-char in the |
3787 | matching algorithm for completion doesn't match "t1_fund" when | |
3788 | completing "t1_func". */ | |
3789 | "t1_func", | |
3790 | "t1_func1", | |
3791 | "t1_fund", | |
3792 | "t1_fund1", | |
3793 | ||
3794 | /* A UTF-8 name with multi-byte sequences to make sure that | |
3795 | cp-name-parser understands this as a single identifier ("função" | |
3796 | is "function" in PT). */ | |
3797 | u8"u8função", | |
3798 | ||
3799 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
3800 | "yfunc\377", | |
3801 | ||
3802 | /* \377 (0xff) is Latin1 'ÿ'. */ | |
3803 | "\377", | |
3804 | "\377\377123", | |
3805 | ||
c62446b1 PA |
3806 | /* A name with all sorts of complications. Starts with "z" to make |
3807 | it easier for the completion tests below. */ | |
3808 | #define Z_SYM_NAME \ | |
3809 | "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \ | |
3810 | "::tuple<(anonymous namespace)::ui*, " \ | |
3811 | "std::default_delete<(anonymous namespace)::ui>, void>" | |
3812 | ||
3813 | Z_SYM_NAME | |
3814 | }; | |
3815 | ||
a3c5fafd PA |
3816 | /* Returns true if the mapped_index_base::find_name_component_bounds |
3817 | method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME, | |
3818 | in completion mode. */ | |
5c58de74 PA |
3819 | |
3820 | static bool | |
a3c5fafd | 3821 | check_find_bounds_finds (mapped_index_base &index, |
5c58de74 | 3822 | const char *search_name, |
fcf23d5b SM |
3823 | gdb::array_view<const char *> expected_syms, |
3824 | dwarf2_per_objfile *per_objfile) | |
5c58de74 PA |
3825 | { |
3826 | lookup_name_info lookup_name (search_name, | |
3827 | symbol_name_match_type::FULL, true); | |
3828 | ||
3b00ef10 | 3829 | auto bounds = index.find_name_components_bounds (lookup_name, |
fcf23d5b SM |
3830 | language_cplus, |
3831 | per_objfile); | |
5c58de74 PA |
3832 | |
3833 | size_t distance = std::distance (bounds.first, bounds.second); | |
3834 | if (distance != expected_syms.size ()) | |
3835 | return false; | |
3836 | ||
3837 | for (size_t exp_elem = 0; exp_elem < distance; exp_elem++) | |
3838 | { | |
3839 | auto nc_elem = bounds.first + exp_elem; | |
fcf23d5b | 3840 | const char *qualified = index.symbol_name_at (nc_elem->idx, per_objfile); |
5c58de74 PA |
3841 | if (strcmp (qualified, expected_syms[exp_elem]) != 0) |
3842 | return false; | |
3843 | } | |
3844 | ||
3845 | return true; | |
3846 | } | |
3847 | ||
3848 | /* Test the lower-level mapped_index::find_name_component_bounds | |
3849 | method. */ | |
3850 | ||
c62446b1 | 3851 | static void |
5c58de74 PA |
3852 | test_mapped_index_find_name_component_bounds () |
3853 | { | |
3854 | mock_mapped_index mock_index (test_symbols); | |
3855 | ||
fcf23d5b | 3856 | mock_index.build_name_components (NULL /* per_objfile */); |
5c58de74 PA |
3857 | |
3858 | /* Test the lower-level mapped_index::find_name_component_bounds | |
3859 | method in completion mode. */ | |
3860 | { | |
3861 | static const char *expected_syms[] = { | |
3862 | "t1_func", | |
3863 | "t1_func1", | |
5c58de74 PA |
3864 | }; |
3865 | ||
fcf23d5b SM |
3866 | SELF_CHECK (check_find_bounds_finds |
3867 | (mock_index, "t1_func", expected_syms, | |
3868 | NULL /* per_objfile */)); | |
5c58de74 PA |
3869 | } |
3870 | ||
3871 | /* Check that the increment-last-char in the name matching algorithm | |
3872 | for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */ | |
3873 | { | |
3874 | static const char *expected_syms1[] = { | |
3875 | "\377", | |
3876 | "\377\377123", | |
3877 | }; | |
fcf23d5b SM |
3878 | SELF_CHECK (check_find_bounds_finds |
3879 | (mock_index, "\377", expected_syms1, NULL /* per_objfile */)); | |
5c58de74 PA |
3880 | |
3881 | static const char *expected_syms2[] = { | |
3882 | "\377\377123", | |
3883 | }; | |
fcf23d5b SM |
3884 | SELF_CHECK (check_find_bounds_finds |
3885 | (mock_index, "\377\377", expected_syms2, | |
3886 | NULL /* per_objfile */)); | |
5c58de74 PA |
3887 | } |
3888 | } | |
3889 | ||
3890 | /* Test dw2_expand_symtabs_matching_symbol. */ | |
3891 | ||
3892 | static void | |
3893 | test_dw2_expand_symtabs_matching_symbol () | |
c62446b1 PA |
3894 | { |
3895 | mock_mapped_index mock_index (test_symbols); | |
3896 | ||
3897 | /* We let all tests run until the end even if some fails, for debug | |
3898 | convenience. */ | |
3899 | bool any_mismatch = false; | |
3900 | ||
3901 | /* Create the expected symbols list (an initializer_list). Needed | |
3902 | because lists have commas, and we need to pass them to CHECK, | |
3903 | which is a macro. */ | |
3904 | #define EXPECT(...) { __VA_ARGS__ } | |
3905 | ||
3906 | /* Wrapper for check_match that passes down the current | |
3907 | __FILE__/__LINE__. */ | |
3908 | #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \ | |
3909 | any_mismatch |= !check_match (__FILE__, __LINE__, \ | |
3910 | mock_index, \ | |
3911 | NAME, MATCH_TYPE, COMPLETION_MODE, \ | |
fcf23d5b | 3912 | EXPECTED_LIST, NULL) |
c62446b1 PA |
3913 | |
3914 | /* Identity checks. */ | |
3915 | for (const char *sym : test_symbols) | |
3916 | { | |
3917 | /* Should be able to match all existing symbols. */ | |
3918 | CHECK_MATCH (sym, symbol_name_match_type::FULL, false, | |
3919 | EXPECT (sym)); | |
3920 | ||
3921 | /* Should be able to match all existing symbols with | |
3922 | parameters. */ | |
3923 | std::string with_params = std::string (sym) + "(int)"; | |
3924 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
3925 | EXPECT (sym)); | |
3926 | ||
3927 | /* Should be able to match all existing symbols with | |
3928 | parameters and qualifiers. */ | |
3929 | with_params = std::string (sym) + " ( int ) const"; | |
3930 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
3931 | EXPECT (sym)); | |
3932 | ||
3933 | /* This should really find sym, but cp-name-parser.y doesn't | |
3934 | know about lvalue/rvalue qualifiers yet. */ | |
3935 | with_params = std::string (sym) + " ( int ) &&"; | |
3936 | CHECK_MATCH (with_params.c_str (), symbol_name_match_type::FULL, false, | |
3937 | {}); | |
3938 | } | |
3939 | ||
e1ef7d7a PA |
3940 | /* Check that the name matching algorithm for completion doesn't get |
3941 | confused with Latin1 'ÿ' / 0xff. */ | |
3942 | { | |
3943 | static const char str[] = "\377"; | |
3944 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
3945 | EXPECT ("\377", "\377\377123")); | |
3946 | } | |
3947 | ||
3948 | /* Check that the increment-last-char in the matching algorithm for | |
3949 | completion doesn't match "t1_fund" when completing "t1_func". */ | |
3950 | { | |
3951 | static const char str[] = "t1_func"; | |
3952 | CHECK_MATCH (str, symbol_name_match_type::FULL, true, | |
3953 | EXPECT ("t1_func", "t1_func1")); | |
3954 | } | |
3955 | ||
c62446b1 PA |
3956 | /* Check that completion mode works at each prefix of the expected |
3957 | symbol name. */ | |
3958 | { | |
3959 | static const char str[] = "function(int)"; | |
3960 | size_t len = strlen (str); | |
3961 | std::string lookup; | |
3962 | ||
3963 | for (size_t i = 1; i < len; i++) | |
3964 | { | |
3965 | lookup.assign (str, i); | |
3966 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
3967 | EXPECT ("function")); | |
3968 | } | |
3969 | } | |
3970 | ||
3971 | /* While "w" is a prefix of both components, the match function | |
3972 | should still only be called once. */ | |
3973 | { | |
3974 | CHECK_MATCH ("w", symbol_name_match_type::FULL, true, | |
3975 | EXPECT ("w1::w2")); | |
a20714ff PA |
3976 | CHECK_MATCH ("w", symbol_name_match_type::WILD, true, |
3977 | EXPECT ("w1::w2")); | |
c62446b1 PA |
3978 | } |
3979 | ||
3980 | /* Same, with a "complicated" symbol. */ | |
3981 | { | |
3982 | static const char str[] = Z_SYM_NAME; | |
3983 | size_t len = strlen (str); | |
3984 | std::string lookup; | |
3985 | ||
3986 | for (size_t i = 1; i < len; i++) | |
3987 | { | |
3988 | lookup.assign (str, i); | |
3989 | CHECK_MATCH (lookup.c_str (), symbol_name_match_type::FULL, true, | |
3990 | EXPECT (Z_SYM_NAME)); | |
3991 | } | |
3992 | } | |
3993 | ||
3994 | /* In FULL mode, an incomplete symbol doesn't match. */ | |
3995 | { | |
3996 | CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL, false, | |
3997 | {}); | |
3998 | } | |
3999 | ||
4000 | /* A complete symbol with parameters matches any overload, since the | |
4001 | index has no overload info. */ | |
4002 | { | |
4003 | CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL, true, | |
4004 | EXPECT ("std::zfunction", "std::zfunction2")); | |
a20714ff PA |
4005 | CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD, true, |
4006 | EXPECT ("std::zfunction", "std::zfunction2")); | |
4007 | CHECK_MATCH ("zfunc", symbol_name_match_type::WILD, true, | |
4008 | EXPECT ("std::zfunction", "std::zfunction2")); | |
c62446b1 PA |
4009 | } |
4010 | ||
4011 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4012 | template argument list. */ | |
4013 | { | |
4014 | static const char expected[] = "ns::foo<int>"; | |
4015 | CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL, false, | |
4016 | EXPECT (expected)); | |
a20714ff PA |
4017 | CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD, false, |
4018 | EXPECT (expected)); | |
c62446b1 PA |
4019 | } |
4020 | ||
4021 | /* Check that whitespace is ignored appropriately. A symbol with a | |
4022 | template argument list that includes a pointer. */ | |
4023 | { | |
4024 | static const char expected[] = "ns::foo<char*>"; | |
4025 | /* Try both completion and non-completion modes. */ | |
4026 | static const bool completion_mode[2] = {false, true}; | |
4027 | for (size_t i = 0; i < 2; i++) | |
4028 | { | |
4029 | CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL, | |
4030 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4031 | CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD, |
4032 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4033 | |
4034 | CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL, | |
4035 | completion_mode[i], EXPECT (expected)); | |
a20714ff PA |
4036 | CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD, |
4037 | completion_mode[i], EXPECT (expected)); | |
c62446b1 PA |
4038 | } |
4039 | } | |
4040 | ||
4041 | { | |
4042 | /* Check method qualifiers are ignored. */ | |
4043 | static const char expected[] = "ns::foo<char*>"; | |
4044 | CHECK_MATCH ("ns :: foo < char * > ( int ) const", | |
4045 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
4046 | CHECK_MATCH ("ns :: foo < char * > ( int ) &&", | |
4047 | symbol_name_match_type::FULL, true, EXPECT (expected)); | |
a20714ff PA |
4048 | CHECK_MATCH ("foo < char * > ( int ) const", |
4049 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
4050 | CHECK_MATCH ("foo < char * > ( int ) &&", | |
4051 | symbol_name_match_type::WILD, true, EXPECT (expected)); | |
c62446b1 PA |
4052 | } |
4053 | ||
4054 | /* Test lookup names that don't match anything. */ | |
4055 | { | |
a20714ff PA |
4056 | CHECK_MATCH ("bar2", symbol_name_match_type::WILD, false, |
4057 | {}); | |
4058 | ||
c62446b1 PA |
4059 | CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL, false, |
4060 | {}); | |
4061 | } | |
4062 | ||
a20714ff PA |
4063 | /* Some wild matching tests, exercising "(anonymous namespace)", |
4064 | which should not be confused with a parameter list. */ | |
4065 | { | |
4066 | static const char *syms[] = { | |
4067 | "A::B::C", | |
4068 | "B::C", | |
4069 | "C", | |
4070 | "A :: B :: C ( int )", | |
4071 | "B :: C ( int )", | |
4072 | "C ( int )", | |
4073 | }; | |
4074 | ||
4075 | for (const char *s : syms) | |
4076 | { | |
4077 | CHECK_MATCH (s, symbol_name_match_type::WILD, false, | |
4078 | EXPECT ("(anonymous namespace)::A::B::C")); | |
4079 | } | |
4080 | } | |
4081 | ||
4082 | { | |
4083 | static const char expected[] = "ns2::tmpl<int>::foo2"; | |
4084 | CHECK_MATCH ("tmp", symbol_name_match_type::WILD, true, | |
4085 | EXPECT (expected)); | |
4086 | CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD, true, | |
4087 | EXPECT (expected)); | |
4088 | } | |
4089 | ||
c62446b1 PA |
4090 | SELF_CHECK (!any_mismatch); |
4091 | ||
4092 | #undef EXPECT | |
4093 | #undef CHECK_MATCH | |
4094 | } | |
4095 | ||
5c58de74 PA |
4096 | static void |
4097 | run_test () | |
4098 | { | |
4099 | test_mapped_index_find_name_component_bounds (); | |
4100 | test_dw2_expand_symtabs_matching_symbol (); | |
4101 | } | |
4102 | ||
c62446b1 PA |
4103 | }} // namespace selftests::dw2_expand_symtabs_matching |
4104 | ||
4105 | #endif /* GDB_SELF_TEST */ | |
4106 | ||
4b514bc8 JK |
4107 | /* If FILE_MATCHER is NULL or if PER_CU has |
4108 | dwarf2_per_cu_quick_data::MARK set (see | |
4109 | dw_expand_symtabs_matching_file_matcher), expand the CU and call | |
4110 | EXPANSION_NOTIFY on it. */ | |
4111 | ||
df35e626 | 4112 | static bool |
4b514bc8 | 4113 | dw2_expand_symtabs_matching_one |
97a1449a SM |
4114 | (dwarf2_per_cu_data *per_cu, |
4115 | dwarf2_per_objfile *per_objfile, | |
4b514bc8 JK |
4116 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4117 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify) | |
4118 | { | |
4119 | if (file_matcher == NULL || per_cu->v.quick->mark) | |
4120 | { | |
af758d11 | 4121 | bool symtab_was_null = !per_objfile->symtab_set_p (per_cu); |
4b514bc8 | 4122 | |
97a1449a SM |
4123 | compunit_symtab *symtab |
4124 | = dw2_instantiate_symtab (per_cu, per_objfile, false); | |
af758d11 | 4125 | gdb_assert (symtab != nullptr); |
4b514bc8 | 4126 | |
af758d11 | 4127 | if (expansion_notify != NULL && symtab_was_null) |
df35e626 | 4128 | return expansion_notify (symtab); |
4b514bc8 | 4129 | } |
df35e626 | 4130 | return true; |
4b514bc8 JK |
4131 | } |
4132 | ||
3f563c84 PA |
4133 | /* Helper for dw2_expand_matching symtabs. Called on each symbol |
4134 | matched, to expand corresponding CUs that were marked. IDX is the | |
4135 | index of the symbol name that matched. */ | |
4136 | ||
df35e626 | 4137 | static bool |
3f563c84 | 4138 | dw2_expand_marked_cus |
976ca316 | 4139 | (dwarf2_per_objfile *per_objfile, offset_type idx, |
3f563c84 PA |
4140 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, |
4141 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 4142 | block_search_flags search_flags, |
3f563c84 PA |
4143 | search_domain kind) |
4144 | { | |
42c2c694 | 4145 | offset_type vec_len, vec_idx; |
3f563c84 | 4146 | bool global_seen = false; |
976ca316 | 4147 | mapped_index &index = *per_objfile->per_bfd->index_table; |
3f563c84 | 4148 | |
42c2c694 TT |
4149 | offset_view vec (index.constant_pool.slice (index.symbol_vec_index (idx))); |
4150 | vec_len = vec[0]; | |
61920122 PA |
4151 | for (vec_idx = 0; vec_idx < vec_len; ++vec_idx) |
4152 | { | |
42c2c694 | 4153 | offset_type cu_index_and_attrs = vec[vec_idx + 1]; |
61920122 PA |
4154 | /* This value is only valid for index versions >= 7. */ |
4155 | int is_static = GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs); | |
4156 | gdb_index_symbol_kind symbol_kind = | |
4157 | GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs); | |
4158 | int cu_index = GDB_INDEX_CU_VALUE (cu_index_and_attrs); | |
4159 | /* Only check the symbol attributes if they're present. | |
4160 | Indices prior to version 7 don't record them, | |
4161 | and indices >= 7 may elide them for certain symbols | |
4162 | (gold does this). */ | |
4163 | int attrs_valid = | |
4164 | (index.version >= 7 | |
4165 | && symbol_kind != GDB_INDEX_SYMBOL_KIND_NONE); | |
4166 | ||
4167 | /* Work around gold/15646. */ | |
f030440d TV |
4168 | if (attrs_valid |
4169 | && !is_static | |
4170 | && symbol_kind == GDB_INDEX_SYMBOL_KIND_TYPE) | |
9291a0cd | 4171 | { |
f030440d | 4172 | if (global_seen) |
61920122 | 4173 | continue; |
f030440d TV |
4174 | |
4175 | global_seen = true; | |
61920122 | 4176 | } |
3190f0c6 | 4177 | |
61920122 PA |
4178 | /* Only check the symbol's kind if it has one. */ |
4179 | if (attrs_valid) | |
4180 | { | |
03a8ea51 TT |
4181 | if (is_static) |
4182 | { | |
4183 | if ((search_flags & SEARCH_STATIC_BLOCK) == 0) | |
4184 | continue; | |
4185 | } | |
4186 | else | |
4187 | { | |
4188 | if ((search_flags & SEARCH_GLOBAL_BLOCK) == 0) | |
4189 | continue; | |
4190 | } | |
4191 | ||
61920122 | 4192 | switch (kind) |
8943b874 | 4193 | { |
61920122 PA |
4194 | case VARIABLES_DOMAIN: |
4195 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_VARIABLE) | |
4196 | continue; | |
4197 | break; | |
4198 | case FUNCTIONS_DOMAIN: | |
4199 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_FUNCTION) | |
8943b874 | 4200 | continue; |
61920122 PA |
4201 | break; |
4202 | case TYPES_DOMAIN: | |
4203 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_TYPE) | |
4204 | continue; | |
4205 | break; | |
59c35742 AB |
4206 | case MODULES_DOMAIN: |
4207 | if (symbol_kind != GDB_INDEX_SYMBOL_KIND_OTHER) | |
4208 | continue; | |
4209 | break; | |
61920122 PA |
4210 | default: |
4211 | break; | |
8943b874 | 4212 | } |
61920122 | 4213 | } |
8943b874 | 4214 | |
61920122 | 4215 | /* Don't crash on bad data. */ |
91eea9cc | 4216 | if (cu_index >= per_objfile->per_bfd->all_comp_units.size ()) |
61920122 | 4217 | { |
b98664d3 | 4218 | complaint (_(".gdb_index entry has bad CU index" |
976ca316 | 4219 | " [in module %s]"), objfile_name (per_objfile->objfile)); |
61920122 PA |
4220 | continue; |
4221 | } | |
4222 | ||
91eea9cc | 4223 | dwarf2_per_cu_data *per_cu = per_objfile->per_bfd->get_cu (cu_index); |
df35e626 TT |
4224 | if (!dw2_expand_symtabs_matching_one (per_cu, per_objfile, file_matcher, |
4225 | expansion_notify)) | |
4226 | return false; | |
61920122 | 4227 | } |
df35e626 TT |
4228 | |
4229 | return true; | |
61920122 PA |
4230 | } |
4231 | ||
4b514bc8 JK |
4232 | /* If FILE_MATCHER is non-NULL, set all the |
4233 | dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE | |
4234 | that match FILE_MATCHER. */ | |
4235 | ||
61920122 | 4236 | static void |
4b514bc8 | 4237 | dw_expand_symtabs_matching_file_matcher |
976ca316 | 4238 | (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 4239 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher) |
61920122 | 4240 | { |
4b514bc8 | 4241 | if (file_matcher == NULL) |
61920122 PA |
4242 | return; |
4243 | ||
4b514bc8 JK |
4244 | htab_up visited_found (htab_create_alloc (10, htab_hash_pointer, |
4245 | htab_eq_pointer, | |
4246 | NULL, xcalloc, xfree)); | |
4247 | htab_up visited_not_found (htab_create_alloc (10, htab_hash_pointer, | |
61920122 PA |
4248 | htab_eq_pointer, |
4249 | NULL, xcalloc, xfree)); | |
61920122 | 4250 | |
4b514bc8 JK |
4251 | /* The rule is CUs specify all the files, including those used by |
4252 | any TU, so there's no need to scan TUs here. */ | |
61920122 | 4253 | |
0d305d5c | 4254 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
927aa2e7 | 4255 | { |
927aa2e7 JK |
4256 | QUIT; |
4257 | ||
91eea9cc TT |
4258 | if (per_cu->is_debug_types) |
4259 | continue; | |
927aa2e7 JK |
4260 | per_cu->v.quick->mark = 0; |
4261 | ||
4262 | /* We only need to look at symtabs not already expanded. */ | |
0d305d5c | 4263 | if (per_objfile->symtab_set_p (per_cu.get ())) |
927aa2e7 JK |
4264 | continue; |
4265 | ||
0d305d5c TT |
4266 | quick_file_names *file_data = dw2_get_file_names (per_cu.get (), |
4267 | per_objfile); | |
927aa2e7 JK |
4268 | if (file_data == NULL) |
4269 | continue; | |
4270 | ||
4271 | if (htab_find (visited_not_found.get (), file_data) != NULL) | |
4272 | continue; | |
4273 | else if (htab_find (visited_found.get (), file_data) != NULL) | |
4274 | { | |
4275 | per_cu->v.quick->mark = 1; | |
4276 | continue; | |
4277 | } | |
4278 | ||
b76e467d | 4279 | for (int j = 0; j < file_data->num_file_names; ++j) |
927aa2e7 JK |
4280 | { |
4281 | const char *this_real_name; | |
4282 | ||
4283 | if (file_matcher (file_data->file_names[j], false)) | |
4284 | { | |
4285 | per_cu->v.quick->mark = 1; | |
4286 | break; | |
4287 | } | |
4288 | ||
4289 | /* Before we invoke realpath, which can get expensive when many | |
4290 | files are involved, do a quick comparison of the basenames. */ | |
4291 | if (!basenames_may_differ | |
4292 | && !file_matcher (lbasename (file_data->file_names[j]), | |
4293 | true)) | |
4294 | continue; | |
4295 | ||
976ca316 | 4296 | this_real_name = dw2_get_real_path (per_objfile, file_data, j); |
927aa2e7 JK |
4297 | if (file_matcher (this_real_name, false)) |
4298 | { | |
4299 | per_cu->v.quick->mark = 1; | |
4300 | break; | |
4301 | } | |
4302 | } | |
4303 | ||
b76e467d SM |
4304 | void **slot = htab_find_slot (per_cu->v.quick->mark |
4305 | ? visited_found.get () | |
4306 | : visited_not_found.get (), | |
4307 | file_data, INSERT); | |
927aa2e7 JK |
4308 | *slot = file_data; |
4309 | } | |
4310 | } | |
4311 | ||
df35e626 | 4312 | bool |
af82f89d TT |
4313 | dwarf2_gdb_index::expand_symtabs_matching |
4314 | (struct objfile *objfile, | |
4315 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
4316 | const lookup_name_info *lookup_name, | |
4317 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, | |
4318 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 4319 | block_search_flags search_flags, |
3bfa51a7 | 4320 | domain_enum domain, |
af82f89d | 4321 | enum search_domain kind) |
927aa2e7 | 4322 | { |
976ca316 | 4323 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
927aa2e7 JK |
4324 | |
4325 | /* index_table is NULL if OBJF_READNOW. */ | |
976ca316 | 4326 | if (!per_objfile->per_bfd->index_table) |
df35e626 | 4327 | return true; |
927aa2e7 | 4328 | |
976ca316 | 4329 | dw_expand_symtabs_matching_file_matcher (per_objfile, file_matcher); |
927aa2e7 | 4330 | |
c1a66c06 TV |
4331 | if (symbol_matcher == NULL && lookup_name == NULL) |
4332 | { | |
0d305d5c | 4333 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
c1a66c06 TV |
4334 | { |
4335 | QUIT; | |
4336 | ||
0d305d5c | 4337 | if (!dw2_expand_symtabs_matching_one (per_cu.get (), per_objfile, |
df35e626 TT |
4338 | file_matcher, |
4339 | expansion_notify)) | |
4340 | return false; | |
c1a66c06 | 4341 | } |
df35e626 | 4342 | return true; |
c1a66c06 TV |
4343 | } |
4344 | ||
976ca316 | 4345 | mapped_index &index = *per_objfile->per_bfd->index_table; |
927aa2e7 | 4346 | |
df35e626 TT |
4347 | bool result |
4348 | = dw2_expand_symtabs_matching_symbol (index, *lookup_name, | |
4349 | symbol_matcher, | |
4350 | [&] (offset_type idx) | |
927aa2e7 | 4351 | { |
df35e626 | 4352 | if (!dw2_expand_marked_cus (per_objfile, idx, file_matcher, |
03a8ea51 | 4353 | expansion_notify, search_flags, kind)) |
df35e626 | 4354 | return false; |
3b00ef10 | 4355 | return true; |
976ca316 | 4356 | }, per_objfile); |
df35e626 TT |
4357 | |
4358 | return result; | |
927aa2e7 JK |
4359 | } |
4360 | ||
4361 | /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific | |
4362 | symtab. */ | |
4363 | ||
4364 | static struct compunit_symtab * | |
4365 | recursively_find_pc_sect_compunit_symtab (struct compunit_symtab *cust, | |
4366 | CORE_ADDR pc) | |
4367 | { | |
4368 | int i; | |
4369 | ||
4370 | if (COMPUNIT_BLOCKVECTOR (cust) != NULL | |
4371 | && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust), pc)) | |
4372 | return cust; | |
4373 | ||
4374 | if (cust->includes == NULL) | |
4375 | return NULL; | |
4376 | ||
4377 | for (i = 0; cust->includes[i]; ++i) | |
4378 | { | |
4379 | struct compunit_symtab *s = cust->includes[i]; | |
4380 | ||
4381 | s = recursively_find_pc_sect_compunit_symtab (s, pc); | |
4382 | if (s != NULL) | |
4383 | return s; | |
4384 | } | |
4385 | ||
4386 | return NULL; | |
4387 | } | |
4388 | ||
39298a5d TT |
4389 | struct compunit_symtab * |
4390 | dwarf2_base_index_functions::find_pc_sect_compunit_symtab | |
4391 | (struct objfile *objfile, | |
4392 | struct bound_minimal_symbol msymbol, | |
4393 | CORE_ADDR pc, | |
4394 | struct obj_section *section, | |
4395 | int warn_if_readin) | |
927aa2e7 JK |
4396 | { |
4397 | struct dwarf2_per_cu_data *data; | |
4398 | struct compunit_symtab *result; | |
4399 | ||
efd7398e TT |
4400 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
4401 | if (per_objfile->per_bfd->index_addrmap == nullptr) | |
927aa2e7 JK |
4402 | return NULL; |
4403 | ||
b3b3bada | 4404 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
efd7398e TT |
4405 | data = ((struct dwarf2_per_cu_data *) |
4406 | addrmap_find (per_objfile->per_bfd->index_addrmap, | |
4407 | pc - baseaddr)); | |
927aa2e7 JK |
4408 | if (!data) |
4409 | return NULL; | |
4410 | ||
af758d11 | 4411 | if (warn_if_readin && per_objfile->symtab_set_p (data)) |
927aa2e7 | 4412 | warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"), |
08feed99 | 4413 | paddress (objfile->arch (), pc)); |
927aa2e7 | 4414 | |
97a1449a SM |
4415 | result = recursively_find_pc_sect_compunit_symtab |
4416 | (dw2_instantiate_symtab (data, per_objfile, false), pc); | |
4417 | ||
927aa2e7 JK |
4418 | gdb_assert (result != NULL); |
4419 | return result; | |
4420 | } | |
4421 | ||
39298a5d | 4422 | void |
f4655dee TT |
4423 | dwarf2_base_index_functions::map_symbol_filenames |
4424 | (struct objfile *objfile, | |
4425 | gdb::function_view<symbol_filename_ftype> fun, | |
4426 | bool need_fullname) | |
927aa2e7 | 4427 | { |
976ca316 | 4428 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
927aa2e7 | 4429 | |
9fc29955 AB |
4430 | /* Use caches to ensure we only call FUN once for each filename. */ |
4431 | filename_seen_cache filenames_cache; | |
4432 | std::unordered_set<quick_file_names *> qfn_cache; | |
927aa2e7 | 4433 | |
9fc29955 AB |
4434 | /* The rule is CUs specify all the files, including those used by any TU, |
4435 | so there's no need to scan TUs here. We can ignore file names coming | |
4436 | from already-expanded CUs. It is possible that an expanded CU might | |
4437 | reuse the file names data from a currently unexpanded CU, in this | |
4438 | case we don't want to report the files from the unexpanded CU. */ | |
927aa2e7 | 4439 | |
0d305d5c | 4440 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
9fc29955 | 4441 | { |
0d305d5c | 4442 | if (per_objfile->symtab_set_p (per_cu.get ())) |
927aa2e7 | 4443 | { |
9fc29955 AB |
4444 | if (per_cu->v.quick->file_names != nullptr) |
4445 | qfn_cache.insert (per_cu->v.quick->file_names); | |
927aa2e7 | 4446 | } |
9fc29955 | 4447 | } |
927aa2e7 | 4448 | |
0d305d5c | 4449 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
9fc29955 AB |
4450 | { |
4451 | /* We only need to look at symtabs not already expanded. */ | |
0d305d5c | 4452 | if (per_objfile->symtab_set_p (per_cu.get ())) |
9fc29955 | 4453 | continue; |
927aa2e7 | 4454 | |
0d305d5c TT |
4455 | quick_file_names *file_data = dw2_get_file_names (per_cu.get (), |
4456 | per_objfile); | |
9fc29955 AB |
4457 | if (file_data == nullptr |
4458 | || qfn_cache.find (file_data) != qfn_cache.end ()) | |
4459 | continue; | |
927aa2e7 | 4460 | |
9fc29955 AB |
4461 | for (int j = 0; j < file_data->num_file_names; ++j) |
4462 | { | |
4463 | const char *filename = file_data->file_names[j]; | |
4464 | filenames_cache.seen (filename); | |
927aa2e7 JK |
4465 | } |
4466 | } | |
4467 | ||
9fc29955 | 4468 | filenames_cache.traverse ([&] (const char *filename) |
927aa2e7 JK |
4469 | { |
4470 | gdb::unique_xmalloc_ptr<char> this_real_name; | |
4471 | ||
4472 | if (need_fullname) | |
4473 | this_real_name = gdb_realpath (filename); | |
f4655dee | 4474 | fun (filename, this_real_name.get ()); |
927aa2e7 JK |
4475 | }); |
4476 | } | |
4477 | ||
39298a5d TT |
4478 | bool |
4479 | dwarf2_base_index_functions::has_symbols (struct objfile *objfile) | |
927aa2e7 | 4480 | { |
fae2120b | 4481 | return true; |
927aa2e7 JK |
4482 | } |
4483 | ||
927aa2e7 JK |
4484 | /* DWARF-5 debug_names reader. */ |
4485 | ||
4486 | /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */ | |
4487 | static const gdb_byte dwarf5_augmentation[] = { 'G', 'D', 'B', 0 }; | |
4488 | ||
4489 | /* A helper function that reads the .debug_names section in SECTION | |
4490 | and fills in MAP. FILENAME is the name of the file containing the | |
4491 | section; it is used for error reporting. | |
4492 | ||
4493 | Returns true if all went well, false otherwise. */ | |
4494 | ||
4495 | static bool | |
4496 | read_debug_names_from_section (struct objfile *objfile, | |
4497 | const char *filename, | |
4498 | struct dwarf2_section_info *section, | |
4499 | mapped_debug_names &map) | |
4500 | { | |
96b79293 | 4501 | if (section->empty ()) |
927aa2e7 JK |
4502 | return false; |
4503 | ||
4504 | /* Older elfutils strip versions could keep the section in the main | |
4505 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 4506 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
927aa2e7 JK |
4507 | return false; |
4508 | ||
96b79293 | 4509 | section->read (objfile); |
927aa2e7 | 4510 | |
08feed99 | 4511 | map.dwarf5_byte_order = gdbarch_byte_order (objfile->arch ()); |
927aa2e7 JK |
4512 | |
4513 | const gdb_byte *addr = section->buffer; | |
4514 | ||
96b79293 | 4515 | bfd *const abfd = section->get_bfd_owner (); |
927aa2e7 JK |
4516 | |
4517 | unsigned int bytes_read; | |
4518 | LONGEST length = read_initial_length (abfd, addr, &bytes_read); | |
4519 | addr += bytes_read; | |
4520 | ||
4521 | map.dwarf5_is_dwarf64 = bytes_read != 4; | |
4522 | map.offset_size = map.dwarf5_is_dwarf64 ? 8 : 4; | |
4523 | if (bytes_read + length != section->size) | |
4524 | { | |
4525 | /* There may be multiple per-CU indices. */ | |
4526 | warning (_("Section .debug_names in %s length %s does not match " | |
4527 | "section length %s, ignoring .debug_names."), | |
4528 | filename, plongest (bytes_read + length), | |
4529 | pulongest (section->size)); | |
4530 | return false; | |
4531 | } | |
4532 | ||
4533 | /* The version number. */ | |
4534 | uint16_t version = read_2_bytes (abfd, addr); | |
4535 | addr += 2; | |
4536 | if (version != 5) | |
4537 | { | |
4538 | warning (_("Section .debug_names in %s has unsupported version %d, " | |
4539 | "ignoring .debug_names."), | |
4540 | filename, version); | |
4541 | return false; | |
4542 | } | |
4543 | ||
4544 | /* Padding. */ | |
4545 | uint16_t padding = read_2_bytes (abfd, addr); | |
4546 | addr += 2; | |
4547 | if (padding != 0) | |
4548 | { | |
4549 | warning (_("Section .debug_names in %s has unsupported padding %d, " | |
4550 | "ignoring .debug_names."), | |
4551 | filename, padding); | |
4552 | return false; | |
4553 | } | |
4554 | ||
4555 | /* comp_unit_count - The number of CUs in the CU list. */ | |
4556 | map.cu_count = read_4_bytes (abfd, addr); | |
4557 | addr += 4; | |
4558 | ||
4559 | /* local_type_unit_count - The number of TUs in the local TU | |
4560 | list. */ | |
4561 | map.tu_count = read_4_bytes (abfd, addr); | |
4562 | addr += 4; | |
4563 | ||
4564 | /* foreign_type_unit_count - The number of TUs in the foreign TU | |
4565 | list. */ | |
4566 | uint32_t foreign_tu_count = read_4_bytes (abfd, addr); | |
4567 | addr += 4; | |
4568 | if (foreign_tu_count != 0) | |
4569 | { | |
4570 | warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, " | |
4571 | "ignoring .debug_names."), | |
4572 | filename, static_cast<unsigned long> (foreign_tu_count)); | |
4573 | return false; | |
4574 | } | |
4575 | ||
4576 | /* bucket_count - The number of hash buckets in the hash lookup | |
4577 | table. */ | |
4578 | map.bucket_count = read_4_bytes (abfd, addr); | |
4579 | addr += 4; | |
4580 | ||
4581 | /* name_count - The number of unique names in the index. */ | |
4582 | map.name_count = read_4_bytes (abfd, addr); | |
4583 | addr += 4; | |
4584 | ||
4585 | /* abbrev_table_size - The size in bytes of the abbreviations | |
4586 | table. */ | |
4587 | uint32_t abbrev_table_size = read_4_bytes (abfd, addr); | |
4588 | addr += 4; | |
4589 | ||
4590 | /* augmentation_string_size - The size in bytes of the augmentation | |
4591 | string. This value is rounded up to a multiple of 4. */ | |
4592 | uint32_t augmentation_string_size = read_4_bytes (abfd, addr); | |
4593 | addr += 4; | |
4594 | map.augmentation_is_gdb = ((augmentation_string_size | |
4595 | == sizeof (dwarf5_augmentation)) | |
4596 | && memcmp (addr, dwarf5_augmentation, | |
4597 | sizeof (dwarf5_augmentation)) == 0); | |
4598 | augmentation_string_size += (-augmentation_string_size) & 3; | |
4599 | addr += augmentation_string_size; | |
4600 | ||
4601 | /* List of CUs */ | |
4602 | map.cu_table_reordered = addr; | |
4603 | addr += map.cu_count * map.offset_size; | |
4604 | ||
4605 | /* List of Local TUs */ | |
4606 | map.tu_table_reordered = addr; | |
4607 | addr += map.tu_count * map.offset_size; | |
4608 | ||
4609 | /* Hash Lookup Table */ | |
4610 | map.bucket_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4611 | addr += map.bucket_count * 4; | |
4612 | map.hash_table_reordered = reinterpret_cast<const uint32_t *> (addr); | |
4613 | addr += map.name_count * 4; | |
4614 | ||
4615 | /* Name Table */ | |
4616 | map.name_table_string_offs_reordered = addr; | |
4617 | addr += map.name_count * map.offset_size; | |
4618 | map.name_table_entry_offs_reordered = addr; | |
4619 | addr += map.name_count * map.offset_size; | |
4620 | ||
4621 | const gdb_byte *abbrev_table_start = addr; | |
4622 | for (;;) | |
4623 | { | |
927aa2e7 JK |
4624 | const ULONGEST index_num = read_unsigned_leb128 (abfd, addr, &bytes_read); |
4625 | addr += bytes_read; | |
4626 | if (index_num == 0) | |
4627 | break; | |
4628 | ||
4629 | const auto insertpair | |
4630 | = map.abbrev_map.emplace (index_num, mapped_debug_names::index_val ()); | |
4631 | if (!insertpair.second) | |
4632 | { | |
4633 | warning (_("Section .debug_names in %s has duplicate index %s, " | |
4634 | "ignoring .debug_names."), | |
4635 | filename, pulongest (index_num)); | |
4636 | return false; | |
4637 | } | |
4638 | mapped_debug_names::index_val &indexval = insertpair.first->second; | |
4639 | indexval.dwarf_tag = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4640 | addr += bytes_read; | |
4641 | ||
4642 | for (;;) | |
4643 | { | |
4644 | mapped_debug_names::index_val::attr attr; | |
4645 | attr.dw_idx = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4646 | addr += bytes_read; | |
4647 | attr.form = read_unsigned_leb128 (abfd, addr, &bytes_read); | |
4648 | addr += bytes_read; | |
4649 | if (attr.form == DW_FORM_implicit_const) | |
4650 | { | |
4651 | attr.implicit_const = read_signed_leb128 (abfd, addr, | |
4652 | &bytes_read); | |
4653 | addr += bytes_read; | |
4654 | } | |
4655 | if (attr.dw_idx == 0 && attr.form == 0) | |
4656 | break; | |
4657 | indexval.attr_vec.push_back (std::move (attr)); | |
4658 | } | |
4659 | } | |
4660 | if (addr != abbrev_table_start + abbrev_table_size) | |
4661 | { | |
4662 | warning (_("Section .debug_names in %s has abbreviation_table " | |
47e3f474 TV |
4663 | "of size %s vs. written as %u, ignoring .debug_names."), |
4664 | filename, plongest (addr - abbrev_table_start), | |
4665 | abbrev_table_size); | |
927aa2e7 JK |
4666 | return false; |
4667 | } | |
4668 | map.entry_pool = addr; | |
4669 | ||
4670 | return true; | |
4671 | } | |
4672 | ||
4673 | /* A helper for create_cus_from_debug_names that handles the MAP's CU | |
4674 | list. */ | |
4675 | ||
4676 | static void | |
168c9250 | 4677 | create_cus_from_debug_names_list (dwarf2_per_bfd *per_bfd, |
927aa2e7 JK |
4678 | const mapped_debug_names &map, |
4679 | dwarf2_section_info §ion, | |
b76e467d | 4680 | bool is_dwz) |
927aa2e7 | 4681 | { |
3ee6bb11 TV |
4682 | if (!map.augmentation_is_gdb) |
4683 | { | |
fc9a13fb TV |
4684 | for (uint32_t i = 0; i < map.cu_count; ++i) |
4685 | { | |
4686 | sect_offset sect_off | |
4687 | = (sect_offset) (extract_unsigned_integer | |
4688 | (map.cu_table_reordered + i * map.offset_size, | |
4689 | map.offset_size, | |
4690 | map.dwarf5_byte_order)); | |
4691 | /* We don't know the length of the CU, because the CU list in a | |
4692 | .debug_names index can be incomplete, so we can't use the start | |
4693 | of the next CU as end of this CU. We create the CUs here with | |
4694 | length 0, and in cutu_reader::cutu_reader we'll fill in the | |
4695 | actual length. */ | |
473ab964 | 4696 | dwarf2_per_cu_data_up per_cu |
fc9a13fb TV |
4697 | = create_cu_from_index_list (per_bfd, §ion, is_dwz, |
4698 | sect_off, 0); | |
0d305d5c | 4699 | per_bfd->all_comp_units.push_back (std::move (per_cu)); |
fc9a13fb | 4700 | } |
d3b54e63 | 4701 | return; |
3ee6bb11 TV |
4702 | } |
4703 | ||
927aa2e7 JK |
4704 | sect_offset sect_off_prev; |
4705 | for (uint32_t i = 0; i <= map.cu_count; ++i) | |
4706 | { | |
4707 | sect_offset sect_off_next; | |
4708 | if (i < map.cu_count) | |
4709 | { | |
4710 | sect_off_next | |
4711 | = (sect_offset) (extract_unsigned_integer | |
4712 | (map.cu_table_reordered + i * map.offset_size, | |
4713 | map.offset_size, | |
4714 | map.dwarf5_byte_order)); | |
4715 | } | |
4716 | else | |
4717 | sect_off_next = (sect_offset) section.size; | |
4718 | if (i >= 1) | |
4719 | { | |
4720 | const ULONGEST length = sect_off_next - sect_off_prev; | |
473ab964 | 4721 | dwarf2_per_cu_data_up per_cu |
168c9250 | 4722 | = create_cu_from_index_list (per_bfd, §ion, is_dwz, |
927aa2e7 | 4723 | sect_off_prev, length); |
0d305d5c | 4724 | per_bfd->all_comp_units.push_back (std::move (per_cu)); |
927aa2e7 JK |
4725 | } |
4726 | sect_off_prev = sect_off_next; | |
4727 | } | |
4728 | } | |
4729 | ||
4730 | /* Read the CU list from the mapped index, and use it to create all | |
ed2dc618 | 4731 | the CU objects for this dwarf2_per_objfile. */ |
927aa2e7 JK |
4732 | |
4733 | static void | |
168c9250 | 4734 | create_cus_from_debug_names (dwarf2_per_bfd *per_bfd, |
927aa2e7 JK |
4735 | const mapped_debug_names &map, |
4736 | const mapped_debug_names &dwz_map) | |
4737 | { | |
168c9250 SM |
4738 | gdb_assert (per_bfd->all_comp_units.empty ()); |
4739 | per_bfd->all_comp_units.reserve (map.cu_count + dwz_map.cu_count); | |
927aa2e7 | 4740 | |
168c9250 | 4741 | create_cus_from_debug_names_list (per_bfd, map, per_bfd->info, |
b76e467d | 4742 | false /* is_dwz */); |
927aa2e7 JK |
4743 | |
4744 | if (dwz_map.cu_count == 0) | |
4745 | return; | |
4746 | ||
168c9250 SM |
4747 | dwz_file *dwz = dwarf2_get_dwz_file (per_bfd); |
4748 | create_cus_from_debug_names_list (per_bfd, dwz_map, dwz->info, | |
b76e467d | 4749 | true /* is_dwz */); |
927aa2e7 JK |
4750 | } |
4751 | ||
4752 | /* Read .debug_names. If everything went ok, initialize the "quick" | |
4753 | elements of all the CUs and return true. Otherwise, return false. */ | |
4754 | ||
4755 | static bool | |
976ca316 | 4756 | dwarf2_read_debug_names (dwarf2_per_objfile *per_objfile) |
927aa2e7 | 4757 | { |
fcf23d5b SM |
4758 | std::unique_ptr<mapped_debug_names> map (new mapped_debug_names); |
4759 | mapped_debug_names dwz_map; | |
976ca316 | 4760 | struct objfile *objfile = per_objfile->objfile; |
f8c41851 | 4761 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
927aa2e7 JK |
4762 | |
4763 | if (!read_debug_names_from_section (objfile, objfile_name (objfile), | |
bab287cd | 4764 | &per_bfd->debug_names, *map)) |
927aa2e7 JK |
4765 | return false; |
4766 | ||
4767 | /* Don't use the index if it's empty. */ | |
22ca247e | 4768 | if (map->name_count == 0) |
927aa2e7 JK |
4769 | return false; |
4770 | ||
4771 | /* If there is a .dwz file, read it so we can get its CU list as | |
4772 | well. */ | |
f8c41851 | 4773 | dwz_file *dwz = dwarf2_get_dwz_file (per_bfd); |
927aa2e7 JK |
4774 | if (dwz != NULL) |
4775 | { | |
4776 | if (!read_debug_names_from_section (objfile, | |
00f93c44 | 4777 | bfd_get_filename (dwz->dwz_bfd.get ()), |
927aa2e7 JK |
4778 | &dwz->debug_names, dwz_map)) |
4779 | { | |
4780 | warning (_("could not read '.debug_names' section from %s; skipping"), | |
00f93c44 | 4781 | bfd_get_filename (dwz->dwz_bfd.get ())); |
927aa2e7 JK |
4782 | return false; |
4783 | } | |
4784 | } | |
4785 | ||
f8c41851 | 4786 | create_cus_from_debug_names (per_bfd, *map, dwz_map); |
927aa2e7 | 4787 | |
22ca247e | 4788 | if (map->tu_count != 0) |
927aa2e7 JK |
4789 | { |
4790 | /* We can only handle a single .debug_types when we have an | |
4791 | index. */ | |
f8c41851 | 4792 | if (per_bfd->types.size () != 1) |
927aa2e7 JK |
4793 | return false; |
4794 | ||
f8c41851 | 4795 | dwarf2_section_info *section = &per_bfd->types[0]; |
927aa2e7 JK |
4796 | |
4797 | create_signatured_type_table_from_debug_names | |
f8c41851 | 4798 | (per_objfile, *map, section, &per_bfd->abbrev); |
927aa2e7 JK |
4799 | } |
4800 | ||
f8c41851 | 4801 | create_addrmap_from_aranges (per_objfile, &per_bfd->debug_aranges); |
927aa2e7 | 4802 | |
f8c41851 SM |
4803 | per_bfd->debug_names_table = std::move (map); |
4804 | per_bfd->using_index = 1; | |
4805 | per_bfd->quick_file_names_table = | |
bab287cd | 4806 | create_quick_file_names_table (per_bfd->all_comp_units.size ()); |
927aa2e7 JK |
4807 | |
4808 | return true; | |
4809 | } | |
4810 | ||
927aa2e7 JK |
4811 | /* Type used to manage iterating over all CUs looking for a symbol for |
4812 | .debug_names. */ | |
4813 | ||
4814 | class dw2_debug_names_iterator | |
4815 | { | |
4816 | public: | |
927aa2e7 | 4817 | dw2_debug_names_iterator (const mapped_debug_names &map, |
03a8ea51 | 4818 | block_search_flags block_index, |
2b79f376 | 4819 | domain_enum domain, |
fcf23d5b | 4820 | const char *name, dwarf2_per_objfile *per_objfile) |
2b79f376 | 4821 | : m_map (map), m_block_index (block_index), m_domain (domain), |
fcf23d5b SM |
4822 | m_addr (find_vec_in_debug_names (map, name, per_objfile)), |
4823 | m_per_objfile (per_objfile) | |
927aa2e7 JK |
4824 | {} |
4825 | ||
4826 | dw2_debug_names_iterator (const mapped_debug_names &map, | |
03a8ea51 | 4827 | search_domain search, uint32_t namei, |
3bfa51a7 TT |
4828 | dwarf2_per_objfile *per_objfile, |
4829 | domain_enum domain = UNDEF_DOMAIN) | |
927aa2e7 | 4830 | : m_map (map), |
3bfa51a7 | 4831 | m_domain (domain), |
927aa2e7 | 4832 | m_search (search), |
fcf23d5b SM |
4833 | m_addr (find_vec_in_debug_names (map, namei, per_objfile)), |
4834 | m_per_objfile (per_objfile) | |
927aa2e7 JK |
4835 | {} |
4836 | ||
3b00ef10 | 4837 | dw2_debug_names_iterator (const mapped_debug_names &map, |
03a8ea51 | 4838 | block_search_flags block_index, domain_enum domain, |
fcf23d5b | 4839 | uint32_t namei, dwarf2_per_objfile *per_objfile) |
3b00ef10 | 4840 | : m_map (map), m_block_index (block_index), m_domain (domain), |
fcf23d5b SM |
4841 | m_addr (find_vec_in_debug_names (map, namei, per_objfile)), |
4842 | m_per_objfile (per_objfile) | |
3b00ef10 TT |
4843 | {} |
4844 | ||
927aa2e7 JK |
4845 | /* Return the next matching CU or NULL if there are no more. */ |
4846 | dwarf2_per_cu_data *next (); | |
4847 | ||
4848 | private: | |
4849 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, | |
976ca316 SM |
4850 | const char *name, |
4851 | dwarf2_per_objfile *per_objfile); | |
927aa2e7 | 4852 | static const gdb_byte *find_vec_in_debug_names (const mapped_debug_names &map, |
976ca316 SM |
4853 | uint32_t namei, |
4854 | dwarf2_per_objfile *per_objfile); | |
927aa2e7 JK |
4855 | |
4856 | /* The internalized form of .debug_names. */ | |
4857 | const mapped_debug_names &m_map; | |
4858 | ||
03a8ea51 TT |
4859 | /* Restrict the search to these blocks. */ |
4860 | block_search_flags m_block_index = (SEARCH_GLOBAL_BLOCK | |
4861 | | SEARCH_STATIC_BLOCK); | |
927aa2e7 JK |
4862 | |
4863 | /* The kind of symbol we're looking for. */ | |
4864 | const domain_enum m_domain = UNDEF_DOMAIN; | |
4865 | const search_domain m_search = ALL_DOMAIN; | |
4866 | ||
4867 | /* The list of CUs from the index entry of the symbol, or NULL if | |
4868 | not found. */ | |
4869 | const gdb_byte *m_addr; | |
fcf23d5b SM |
4870 | |
4871 | dwarf2_per_objfile *m_per_objfile; | |
927aa2e7 JK |
4872 | }; |
4873 | ||
4874 | const char * | |
fcf23d5b | 4875 | mapped_debug_names::namei_to_name |
976ca316 | 4876 | (uint32_t namei, dwarf2_per_objfile *per_objfile) const |
927aa2e7 JK |
4877 | { |
4878 | const ULONGEST namei_string_offs | |
4879 | = extract_unsigned_integer ((name_table_string_offs_reordered | |
4880 | + namei * offset_size), | |
4881 | offset_size, | |
4882 | dwarf5_byte_order); | |
976ca316 | 4883 | return read_indirect_string_at_offset (per_objfile, namei_string_offs); |
927aa2e7 JK |
4884 | } |
4885 | ||
4886 | /* Find a slot in .debug_names for the object named NAME. If NAME is | |
4887 | found, return pointer to its pool data. If NAME cannot be found, | |
4888 | return NULL. */ | |
4889 | ||
4890 | const gdb_byte * | |
4891 | dw2_debug_names_iterator::find_vec_in_debug_names | |
976ca316 SM |
4892 | (const mapped_debug_names &map, const char *name, |
4893 | dwarf2_per_objfile *per_objfile) | |
927aa2e7 JK |
4894 | { |
4895 | int (*cmp) (const char *, const char *); | |
4896 | ||
54ee4252 | 4897 | gdb::unique_xmalloc_ptr<char> without_params; |
927aa2e7 JK |
4898 | if (current_language->la_language == language_cplus |
4899 | || current_language->la_language == language_fortran | |
4900 | || current_language->la_language == language_d) | |
4901 | { | |
4902 | /* NAME is already canonical. Drop any qualifiers as | |
4903 | .debug_names does not contain any. */ | |
4904 | ||
4905 | if (strchr (name, '(') != NULL) | |
4906 | { | |
54ee4252 | 4907 | without_params = cp_remove_params (name); |
927aa2e7 | 4908 | if (without_params != NULL) |
54ee4252 | 4909 | name = without_params.get (); |
927aa2e7 JK |
4910 | } |
4911 | } | |
4912 | ||
4913 | cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp); | |
4914 | ||
4915 | const uint32_t full_hash = dwarf5_djb_hash (name); | |
4916 | uint32_t namei | |
4917 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
4918 | (map.bucket_table_reordered | |
4919 | + (full_hash % map.bucket_count)), 4, | |
4920 | map.dwarf5_byte_order); | |
4921 | if (namei == 0) | |
4922 | return NULL; | |
4923 | --namei; | |
4924 | if (namei >= map.name_count) | |
4925 | { | |
b98664d3 | 4926 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
4927 | "[in module %s]"), |
4928 | namei, map.name_count, | |
fcf23d5b | 4929 | objfile_name (per_objfile->objfile)); |
927aa2e7 JK |
4930 | return NULL; |
4931 | } | |
4932 | ||
4933 | for (;;) | |
4934 | { | |
4935 | const uint32_t namei_full_hash | |
4936 | = extract_unsigned_integer (reinterpret_cast<const gdb_byte *> | |
4937 | (map.hash_table_reordered + namei), 4, | |
4938 | map.dwarf5_byte_order); | |
4939 | if (full_hash % map.bucket_count != namei_full_hash % map.bucket_count) | |
4940 | return NULL; | |
4941 | ||
4942 | if (full_hash == namei_full_hash) | |
4943 | { | |
fcf23d5b | 4944 | const char *const namei_string = map.namei_to_name (namei, per_objfile); |
927aa2e7 JK |
4945 | |
4946 | #if 0 /* An expensive sanity check. */ | |
4947 | if (namei_full_hash != dwarf5_djb_hash (namei_string)) | |
4948 | { | |
b98664d3 | 4949 | complaint (_("Wrong .debug_names hash for string at index %u " |
927aa2e7 JK |
4950 | "[in module %s]"), |
4951 | namei, objfile_name (dwarf2_per_objfile->objfile)); | |
4952 | return NULL; | |
4953 | } | |
4954 | #endif | |
4955 | ||
4956 | if (cmp (namei_string, name) == 0) | |
4957 | { | |
4958 | const ULONGEST namei_entry_offs | |
4959 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
4960 | + namei * map.offset_size), | |
4961 | map.offset_size, map.dwarf5_byte_order); | |
4962 | return map.entry_pool + namei_entry_offs; | |
4963 | } | |
4964 | } | |
4965 | ||
4966 | ++namei; | |
4967 | if (namei >= map.name_count) | |
4968 | return NULL; | |
4969 | } | |
4970 | } | |
4971 | ||
4972 | const gdb_byte * | |
4973 | dw2_debug_names_iterator::find_vec_in_debug_names | |
fcf23d5b | 4974 | (const mapped_debug_names &map, uint32_t namei, dwarf2_per_objfile *per_objfile) |
927aa2e7 JK |
4975 | { |
4976 | if (namei >= map.name_count) | |
4977 | { | |
b98664d3 | 4978 | complaint (_("Wrong .debug_names with name index %u but name_count=%u " |
927aa2e7 JK |
4979 | "[in module %s]"), |
4980 | namei, map.name_count, | |
fcf23d5b | 4981 | objfile_name (per_objfile->objfile)); |
927aa2e7 JK |
4982 | return NULL; |
4983 | } | |
4984 | ||
4985 | const ULONGEST namei_entry_offs | |
4986 | = extract_unsigned_integer ((map.name_table_entry_offs_reordered | |
4987 | + namei * map.offset_size), | |
4988 | map.offset_size, map.dwarf5_byte_order); | |
4989 | return map.entry_pool + namei_entry_offs; | |
4990 | } | |
4991 | ||
4992 | /* See dw2_debug_names_iterator. */ | |
4993 | ||
4994 | dwarf2_per_cu_data * | |
4995 | dw2_debug_names_iterator::next () | |
4996 | { | |
4997 | if (m_addr == NULL) | |
4998 | return NULL; | |
4999 | ||
fcf23d5b SM |
5000 | dwarf2_per_bfd *per_bfd = m_per_objfile->per_bfd; |
5001 | struct objfile *objfile = m_per_objfile->objfile; | |
ed2dc618 | 5002 | bfd *const abfd = objfile->obfd; |
927aa2e7 JK |
5003 | |
5004 | again: | |
5005 | ||
5006 | unsigned int bytes_read; | |
5007 | const ULONGEST abbrev = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5008 | m_addr += bytes_read; | |
5009 | if (abbrev == 0) | |
5010 | return NULL; | |
5011 | ||
5012 | const auto indexval_it = m_map.abbrev_map.find (abbrev); | |
5013 | if (indexval_it == m_map.abbrev_map.cend ()) | |
5014 | { | |
b98664d3 | 5015 | complaint (_("Wrong .debug_names undefined abbrev code %s " |
927aa2e7 | 5016 | "[in module %s]"), |
ed2dc618 | 5017 | pulongest (abbrev), objfile_name (objfile)); |
927aa2e7 JK |
5018 | return NULL; |
5019 | } | |
5020 | const mapped_debug_names::index_val &indexval = indexval_it->second; | |
beadd3e8 SM |
5021 | enum class symbol_linkage { |
5022 | unknown, | |
5023 | static_, | |
5024 | extern_, | |
23c13d42 | 5025 | } symbol_linkage_ = symbol_linkage::unknown; |
927aa2e7 JK |
5026 | dwarf2_per_cu_data *per_cu = NULL; |
5027 | for (const mapped_debug_names::index_val::attr &attr : indexval.attr_vec) | |
5028 | { | |
5029 | ULONGEST ull; | |
5030 | switch (attr.form) | |
5031 | { | |
5032 | case DW_FORM_implicit_const: | |
5033 | ull = attr.implicit_const; | |
5034 | break; | |
5035 | case DW_FORM_flag_present: | |
5036 | ull = 1; | |
5037 | break; | |
5038 | case DW_FORM_udata: | |
5039 | ull = read_unsigned_leb128 (abfd, m_addr, &bytes_read); | |
5040 | m_addr += bytes_read; | |
5041 | break; | |
6dc55ce9 | 5042 | case DW_FORM_ref4: |
5043 | ull = read_4_bytes (abfd, m_addr); | |
5044 | m_addr += 4; | |
5045 | break; | |
5046 | case DW_FORM_ref8: | |
5047 | ull = read_8_bytes (abfd, m_addr); | |
5048 | m_addr += 8; | |
5049 | break; | |
5050 | case DW_FORM_ref_sig8: | |
5051 | ull = read_8_bytes (abfd, m_addr); | |
5052 | m_addr += 8; | |
5053 | break; | |
927aa2e7 | 5054 | default: |
b98664d3 | 5055 | complaint (_("Unsupported .debug_names form %s [in module %s]"), |
927aa2e7 | 5056 | dwarf_form_name (attr.form), |
ed2dc618 | 5057 | objfile_name (objfile)); |
927aa2e7 JK |
5058 | return NULL; |
5059 | } | |
5060 | switch (attr.dw_idx) | |
5061 | { | |
5062 | case DW_IDX_compile_unit: | |
5063 | /* Don't crash on bad data. */ | |
bab287cd | 5064 | if (ull >= per_bfd->all_comp_units.size ()) |
927aa2e7 | 5065 | { |
b98664d3 | 5066 | complaint (_(".debug_names entry has bad CU index %s" |
927aa2e7 JK |
5067 | " [in module %s]"), |
5068 | pulongest (ull), | |
fcf23d5b | 5069 | objfile_name (objfile)); |
927aa2e7 JK |
5070 | continue; |
5071 | } | |
91eea9cc | 5072 | per_cu = per_bfd->get_cu (ull); |
927aa2e7 | 5073 | break; |
8af5c486 JK |
5074 | case DW_IDX_type_unit: |
5075 | /* Don't crash on bad data. */ | |
91eea9cc | 5076 | if (ull >= per_bfd->tu_stats.nr_tus) |
8af5c486 | 5077 | { |
b98664d3 | 5078 | complaint (_(".debug_names entry has bad TU index %s" |
8af5c486 JK |
5079 | " [in module %s]"), |
5080 | pulongest (ull), | |
fcf23d5b | 5081 | objfile_name (objfile)); |
8af5c486 JK |
5082 | continue; |
5083 | } | |
91eea9cc | 5084 | per_cu = per_bfd->get_cu (ull + per_bfd->tu_stats.nr_tus); |
8af5c486 | 5085 | break; |
6dc55ce9 | 5086 | case DW_IDX_die_offset: |
5087 | /* In a per-CU index (as opposed to a per-module index), index | |
5088 | entries without CU attribute implicitly refer to the single CU. */ | |
5089 | if (per_cu == NULL) | |
fcf23d5b | 5090 | per_cu = per_bfd->get_cu (0); |
6dc55ce9 | 5091 | break; |
927aa2e7 JK |
5092 | case DW_IDX_GNU_internal: |
5093 | if (!m_map.augmentation_is_gdb) | |
5094 | break; | |
23c13d42 | 5095 | symbol_linkage_ = symbol_linkage::static_; |
927aa2e7 JK |
5096 | break; |
5097 | case DW_IDX_GNU_external: | |
5098 | if (!m_map.augmentation_is_gdb) | |
5099 | break; | |
23c13d42 | 5100 | symbol_linkage_ = symbol_linkage::extern_; |
927aa2e7 JK |
5101 | break; |
5102 | } | |
5103 | } | |
5104 | ||
5105 | /* Skip if already read in. */ | |
fcf23d5b | 5106 | if (m_per_objfile->symtab_set_p (per_cu)) |
927aa2e7 JK |
5107 | goto again; |
5108 | ||
5109 | /* Check static vs global. */ | |
03a8ea51 | 5110 | if (symbol_linkage_ != symbol_linkage::unknown) |
927aa2e7 | 5111 | { |
03a8ea51 TT |
5112 | if (symbol_linkage_ == symbol_linkage::static_) |
5113 | { | |
5114 | if ((m_block_index & SEARCH_STATIC_BLOCK) == 0) | |
5115 | goto again; | |
5116 | } | |
5117 | else | |
5118 | { | |
5119 | if ((m_block_index & SEARCH_GLOBAL_BLOCK) == 0) | |
5120 | goto again; | |
5121 | } | |
927aa2e7 JK |
5122 | } |
5123 | ||
5124 | /* Match dw2_symtab_iter_next, symbol_kind | |
5125 | and debug_names::psymbol_tag. */ | |
5126 | switch (m_domain) | |
5127 | { | |
5128 | case VAR_DOMAIN: | |
5129 | switch (indexval.dwarf_tag) | |
5130 | { | |
5131 | case DW_TAG_variable: | |
5132 | case DW_TAG_subprogram: | |
5133 | /* Some types are also in VAR_DOMAIN. */ | |
5134 | case DW_TAG_typedef: | |
5135 | case DW_TAG_structure_type: | |
5136 | break; | |
5137 | default: | |
5138 | goto again; | |
5139 | } | |
5140 | break; | |
5141 | case STRUCT_DOMAIN: | |
5142 | switch (indexval.dwarf_tag) | |
5143 | { | |
5144 | case DW_TAG_typedef: | |
5145 | case DW_TAG_structure_type: | |
5146 | break; | |
5147 | default: | |
5148 | goto again; | |
5149 | } | |
5150 | break; | |
5151 | case LABEL_DOMAIN: | |
5152 | switch (indexval.dwarf_tag) | |
5153 | { | |
5154 | case 0: | |
5155 | case DW_TAG_variable: | |
5156 | break; | |
5157 | default: | |
5158 | goto again; | |
5159 | } | |
5160 | break; | |
59c35742 AB |
5161 | case MODULE_DOMAIN: |
5162 | switch (indexval.dwarf_tag) | |
5163 | { | |
5164 | case DW_TAG_module: | |
5165 | break; | |
5166 | default: | |
5167 | goto again; | |
5168 | } | |
5169 | break; | |
927aa2e7 JK |
5170 | default: |
5171 | break; | |
5172 | } | |
5173 | ||
5174 | /* Match dw2_expand_symtabs_matching, symbol_kind and | |
5175 | debug_names::psymbol_tag. */ | |
5176 | switch (m_search) | |
4b514bc8 | 5177 | { |
927aa2e7 JK |
5178 | case VARIABLES_DOMAIN: |
5179 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5180 | { |
927aa2e7 JK |
5181 | case DW_TAG_variable: |
5182 | break; | |
5183 | default: | |
5184 | goto again; | |
4b514bc8 | 5185 | } |
927aa2e7 JK |
5186 | break; |
5187 | case FUNCTIONS_DOMAIN: | |
5188 | switch (indexval.dwarf_tag) | |
4b514bc8 | 5189 | { |
927aa2e7 JK |
5190 | case DW_TAG_subprogram: |
5191 | break; | |
5192 | default: | |
5193 | goto again; | |
4b514bc8 | 5194 | } |
927aa2e7 JK |
5195 | break; |
5196 | case TYPES_DOMAIN: | |
5197 | switch (indexval.dwarf_tag) | |
5198 | { | |
5199 | case DW_TAG_typedef: | |
5200 | case DW_TAG_structure_type: | |
5201 | break; | |
5202 | default: | |
5203 | goto again; | |
5204 | } | |
5205 | break; | |
59c35742 AB |
5206 | case MODULES_DOMAIN: |
5207 | switch (indexval.dwarf_tag) | |
5208 | { | |
5209 | case DW_TAG_module: | |
5210 | break; | |
5211 | default: | |
5212 | goto again; | |
5213 | } | |
927aa2e7 JK |
5214 | default: |
5215 | break; | |
4b514bc8 | 5216 | } |
927aa2e7 JK |
5217 | |
5218 | return per_cu; | |
4b514bc8 | 5219 | } |
61920122 | 5220 | |
927aa2e7 JK |
5221 | /* This dumps minimal information about .debug_names. It is called |
5222 | via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase | |
5223 | uses this to verify that .debug_names has been loaded. */ | |
9291a0cd | 5224 | |
39298a5d TT |
5225 | void |
5226 | dwarf2_debug_names_index::dump (struct objfile *objfile) | |
927aa2e7 | 5227 | { |
976ca316 | 5228 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 5229 | |
976ca316 | 5230 | gdb_assert (per_objfile->per_bfd->using_index); |
927aa2e7 | 5231 | printf_filtered (".debug_names:"); |
976ca316 | 5232 | if (per_objfile->per_bfd->debug_names_table) |
927aa2e7 JK |
5233 | printf_filtered (" exists\n"); |
5234 | else | |
5235 | printf_filtered (" faked for \"readnow\"\n"); | |
5236 | printf_filtered ("\n"); | |
9291a0cd TT |
5237 | } |
5238 | ||
39298a5d | 5239 | void |
0b7b2c2a | 5240 | dwarf2_debug_names_index::expand_matching_symbols |
3b00ef10 TT |
5241 | (struct objfile *objfile, |
5242 | const lookup_name_info &name, domain_enum domain, | |
5243 | int global, | |
3b00ef10 TT |
5244 | symbol_compare_ftype *ordered_compare) |
5245 | { | |
976ca316 | 5246 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
3b00ef10 TT |
5247 | |
5248 | /* debug_names_table is NULL if OBJF_READNOW. */ | |
976ca316 | 5249 | if (!per_objfile->per_bfd->debug_names_table) |
3b00ef10 TT |
5250 | return; |
5251 | ||
976ca316 | 5252 | mapped_debug_names &map = *per_objfile->per_bfd->debug_names_table; |
03a8ea51 TT |
5253 | const block_search_flags block_flags |
5254 | = global ? SEARCH_GLOBAL_BLOCK : SEARCH_STATIC_BLOCK; | |
3b00ef10 TT |
5255 | |
5256 | const char *match_name = name.ada ().lookup_name ().c_str (); | |
5257 | auto matcher = [&] (const char *symname) | |
5258 | { | |
5259 | if (ordered_compare == nullptr) | |
5260 | return true; | |
5261 | return ordered_compare (symname, match_name) == 0; | |
5262 | }; | |
5263 | ||
b64f703b | 5264 | dw2_expand_symtabs_matching_symbol (map, name, matcher, |
3b00ef10 TT |
5265 | [&] (offset_type namei) |
5266 | { | |
5267 | /* The name was matched, now expand corresponding CUs that were | |
5268 | marked. */ | |
03a8ea51 | 5269 | dw2_debug_names_iterator iter (map, block_flags, domain, namei, |
976ca316 | 5270 | per_objfile); |
3b00ef10 TT |
5271 | |
5272 | struct dwarf2_per_cu_data *per_cu; | |
5273 | while ((per_cu = iter.next ()) != NULL) | |
976ca316 | 5274 | dw2_expand_symtabs_matching_one (per_cu, per_objfile, nullptr, |
97a1449a | 5275 | nullptr); |
3b00ef10 | 5276 | return true; |
976ca316 | 5277 | }, per_objfile); |
3b00ef10 TT |
5278 | } |
5279 | ||
df35e626 | 5280 | bool |
39298a5d | 5281 | dwarf2_debug_names_index::expand_symtabs_matching |
927aa2e7 JK |
5282 | (struct objfile *objfile, |
5283 | gdb::function_view<expand_symtabs_file_matcher_ftype> file_matcher, | |
c1a66c06 | 5284 | const lookup_name_info *lookup_name, |
927aa2e7 JK |
5285 | gdb::function_view<expand_symtabs_symbol_matcher_ftype> symbol_matcher, |
5286 | gdb::function_view<expand_symtabs_exp_notify_ftype> expansion_notify, | |
03a8ea51 | 5287 | block_search_flags search_flags, |
3bfa51a7 | 5288 | domain_enum domain, |
927aa2e7 JK |
5289 | enum search_domain kind) |
5290 | { | |
976ca316 | 5291 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
9291a0cd | 5292 | |
927aa2e7 | 5293 | /* debug_names_table is NULL if OBJF_READNOW. */ |
976ca316 | 5294 | if (!per_objfile->per_bfd->debug_names_table) |
df35e626 | 5295 | return true; |
9291a0cd | 5296 | |
976ca316 | 5297 | dw_expand_symtabs_matching_file_matcher (per_objfile, file_matcher); |
24c79950 | 5298 | |
c1a66c06 TV |
5299 | if (symbol_matcher == NULL && lookup_name == NULL) |
5300 | { | |
0d305d5c | 5301 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
c1a66c06 TV |
5302 | { |
5303 | QUIT; | |
5304 | ||
0d305d5c | 5305 | if (!dw2_expand_symtabs_matching_one (per_cu.get (), per_objfile, |
df35e626 TT |
5306 | file_matcher, |
5307 | expansion_notify)) | |
5308 | return false; | |
c1a66c06 | 5309 | } |
df35e626 | 5310 | return true; |
c1a66c06 TV |
5311 | } |
5312 | ||
976ca316 | 5313 | mapped_debug_names &map = *per_objfile->per_bfd->debug_names_table; |
bbf2f4df | 5314 | |
df35e626 TT |
5315 | bool result |
5316 | = dw2_expand_symtabs_matching_symbol (map, *lookup_name, | |
5317 | symbol_matcher, | |
5318 | [&] (offset_type namei) | |
927aa2e7 | 5319 | { |
927aa2e7 JK |
5320 | /* The name was matched, now expand corresponding CUs that were |
5321 | marked. */ | |
3bfa51a7 | 5322 | dw2_debug_names_iterator iter (map, kind, namei, per_objfile, domain); |
bbf2f4df | 5323 | |
927aa2e7 JK |
5324 | struct dwarf2_per_cu_data *per_cu; |
5325 | while ((per_cu = iter.next ()) != NULL) | |
df35e626 TT |
5326 | if (!dw2_expand_symtabs_matching_one (per_cu, per_objfile, |
5327 | file_matcher, | |
5328 | expansion_notify)) | |
5329 | return false; | |
3b00ef10 | 5330 | return true; |
976ca316 | 5331 | }, per_objfile); |
df35e626 TT |
5332 | |
5333 | return result; | |
9291a0cd TT |
5334 | } |
5335 | ||
4485a1c1 | 5336 | /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point |
5989a64e | 5337 | to either a dwarf2_per_bfd or dwz_file object. */ |
4485a1c1 SM |
5338 | |
5339 | template <typename T> | |
5340 | static gdb::array_view<const gdb_byte> | |
5341 | get_gdb_index_contents_from_section (objfile *obj, T *section_owner) | |
5342 | { | |
5343 | dwarf2_section_info *section = §ion_owner->gdb_index; | |
5344 | ||
96b79293 | 5345 | if (section->empty ()) |
4485a1c1 SM |
5346 | return {}; |
5347 | ||
5348 | /* Older elfutils strip versions could keep the section in the main | |
5349 | executable while splitting it for the separate debug info file. */ | |
96b79293 | 5350 | if ((section->get_flags () & SEC_HAS_CONTENTS) == 0) |
4485a1c1 SM |
5351 | return {}; |
5352 | ||
96b79293 | 5353 | section->read (obj); |
4485a1c1 | 5354 | |
8bebfcda PA |
5355 | /* dwarf2_section_info::size is a bfd_size_type, while |
5356 | gdb::array_view works with size_t. On 32-bit hosts, with | |
5357 | --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t | |
5358 | is 32-bit. So we need an explicit narrowing conversion here. | |
5359 | This is fine, because it's impossible to allocate or mmap an | |
5360 | array/buffer larger than what size_t can represent. */ | |
5361 | return gdb::make_array_view (section->buffer, section->size); | |
4485a1c1 SM |
5362 | } |
5363 | ||
87d6a7aa SM |
5364 | /* Lookup the index cache for the contents of the index associated to |
5365 | DWARF2_OBJ. */ | |
5366 | ||
5367 | static gdb::array_view<const gdb_byte> | |
5989a64e | 5368 | get_gdb_index_contents_from_cache (objfile *obj, dwarf2_per_bfd *dwarf2_per_bfd) |
87d6a7aa SM |
5369 | { |
5370 | const bfd_build_id *build_id = build_id_bfd_get (obj->obfd); | |
5371 | if (build_id == nullptr) | |
5372 | return {}; | |
5373 | ||
5374 | return global_index_cache.lookup_gdb_index (build_id, | |
5989a64e | 5375 | &dwarf2_per_bfd->index_cache_res); |
87d6a7aa SM |
5376 | } |
5377 | ||
5378 | /* Same as the above, but for DWZ. */ | |
5379 | ||
5380 | static gdb::array_view<const gdb_byte> | |
5381 | get_gdb_index_contents_from_cache_dwz (objfile *obj, dwz_file *dwz) | |
5382 | { | |
5383 | const bfd_build_id *build_id = build_id_bfd_get (dwz->dwz_bfd.get ()); | |
5384 | if (build_id == nullptr) | |
5385 | return {}; | |
5386 | ||
5387 | return global_index_cache.lookup_gdb_index (build_id, &dwz->index_cache_res); | |
5388 | } | |
5389 | ||
edc02ceb | 5390 | /* See dwarf2/public.h. */ |
9291a0cd | 5391 | |
edc02ceb TT |
5392 | void |
5393 | dwarf2_initialize_objfile (struct objfile *objfile) | |
9291a0cd | 5394 | { |
976ca316 SM |
5395 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
5396 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
ed2dc618 | 5397 | |
850ed749 SM |
5398 | dwarf_read_debug_printf ("called"); |
5399 | ||
9291a0cd TT |
5400 | /* If we're about to read full symbols, don't bother with the |
5401 | indices. In this case we also don't care if some other debug | |
5402 | format is making psymtabs, because they are all about to be | |
5403 | expanded anyway. */ | |
5404 | if ((objfile->flags & OBJF_READNOW)) | |
5405 | { | |
850ed749 SM |
5406 | dwarf_read_debug_printf ("readnow requested"); |
5407 | ||
17ee85fc TT |
5408 | /* When using READNOW, the using_index flag (set below) indicates that |
5409 | PER_BFD was already initialized, when we loaded some other objfile. */ | |
5410 | if (per_bfd->using_index) | |
5411 | { | |
850ed749 | 5412 | dwarf_read_debug_printf ("using_index already set"); |
976ca316 | 5413 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5414 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5415 | return; | |
17ee85fc TT |
5416 | } |
5417 | ||
5418 | per_bfd->using_index = 1; | |
976ca316 | 5419 | create_all_comp_units (per_objfile); |
17ee85fc TT |
5420 | per_bfd->quick_file_names_table |
5421 | = create_quick_file_names_table (per_bfd->all_comp_units.size ()); | |
976ca316 | 5422 | per_objfile->resize_symtabs (); |
9291a0cd | 5423 | |
91eea9cc | 5424 | for (int i = 0; i < per_bfd->all_comp_units.size (); ++i) |
9291a0cd | 5425 | { |
91eea9cc | 5426 | dwarf2_per_cu_data *per_cu = per_bfd->get_cu (i); |
9291a0cd | 5427 | |
17ee85fc | 5428 | per_cu->v.quick = OBSTACK_ZALLOC (&per_bfd->obstack, |
e254ef6a | 5429 | struct dwarf2_per_cu_quick_data); |
9291a0cd TT |
5430 | } |
5431 | ||
edc02ceb TT |
5432 | /* Arrange for gdb to see the "quick" functions. However, these |
5433 | functions will be no-ops because we will have expanded all | |
5434 | symtabs. */ | |
5435 | objfile->qf.push_front (make_dwarf_gdb_index ()); | |
5436 | return; | |
9291a0cd TT |
5437 | } |
5438 | ||
17ee85fc TT |
5439 | /* Was a debug names index already read when we processed an objfile sharing |
5440 | PER_BFD? */ | |
5441 | if (per_bfd->debug_names_table != nullptr) | |
5442 | { | |
850ed749 | 5443 | dwarf_read_debug_printf ("re-using shared debug names table"); |
976ca316 | 5444 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5445 | objfile->qf.push_front (make_dwarf_debug_names ()); |
5446 | return; | |
17ee85fc TT |
5447 | } |
5448 | ||
5449 | /* Was a GDB index already read when we processed an objfile sharing | |
5450 | PER_BFD? */ | |
5451 | if (per_bfd->index_table != nullptr) | |
5452 | { | |
850ed749 | 5453 | dwarf_read_debug_printf ("re-using shared index table"); |
976ca316 | 5454 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5455 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5456 | return; | |
17ee85fc TT |
5457 | } |
5458 | ||
efb763a5 SM |
5459 | /* There might already be partial symtabs built for this BFD. This happens |
5460 | when loading the same binary twice with the index-cache enabled. If so, | |
5461 | don't try to read an index. The objfile / per_objfile initialization will | |
5462 | be completed in dwarf2_build_psymtabs, in the standard partial symtabs | |
5463 | code path. */ | |
5464 | if (per_bfd->partial_symtabs != nullptr) | |
850ed749 SM |
5465 | { |
5466 | dwarf_read_debug_printf ("re-using shared partial symtabs"); | |
edc02ceb TT |
5467 | objfile->qf.push_front (make_lazy_dwarf_reader ()); |
5468 | return; | |
850ed749 | 5469 | } |
efb763a5 | 5470 | |
976ca316 | 5471 | if (dwarf2_read_debug_names (per_objfile)) |
3c0aa29a | 5472 | { |
850ed749 | 5473 | dwarf_read_debug_printf ("found debug names"); |
976ca316 | 5474 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5475 | objfile->qf.push_front (make_dwarf_debug_names ()); |
5476 | return; | |
3c0aa29a | 5477 | } |
927aa2e7 | 5478 | |
976ca316 | 5479 | if (dwarf2_read_gdb_index (per_objfile, |
5989a64e | 5480 | get_gdb_index_contents_from_section<struct dwarf2_per_bfd>, |
4485a1c1 | 5481 | get_gdb_index_contents_from_section<dwz_file>)) |
3c0aa29a | 5482 | { |
850ed749 | 5483 | dwarf_read_debug_printf ("found gdb index from file"); |
976ca316 | 5484 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5485 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5486 | return; | |
3c0aa29a | 5487 | } |
9291a0cd | 5488 | |
87d6a7aa | 5489 | /* ... otherwise, try to find the index in the index cache. */ |
976ca316 | 5490 | if (dwarf2_read_gdb_index (per_objfile, |
87d6a7aa SM |
5491 | get_gdb_index_contents_from_cache, |
5492 | get_gdb_index_contents_from_cache_dwz)) | |
5493 | { | |
850ed749 | 5494 | dwarf_read_debug_printf ("found gdb index from cache"); |
87d6a7aa | 5495 | global_index_cache.hit (); |
976ca316 | 5496 | per_objfile->resize_symtabs (); |
edc02ceb TT |
5497 | objfile->qf.push_front (make_dwarf_gdb_index ()); |
5498 | return; | |
87d6a7aa SM |
5499 | } |
5500 | ||
5501 | global_index_cache.miss (); | |
edc02ceb | 5502 | objfile->qf.push_front (make_lazy_dwarf_reader ()); |
9291a0cd TT |
5503 | } |
5504 | ||
5505 | \f | |
5506 | ||
dce234bc PP |
5507 | /* Build a partial symbol table. */ |
5508 | ||
5509 | void | |
eb36a3eb | 5510 | dwarf2_build_psymtabs (struct objfile *objfile, psymbol_functions *psf) |
dce234bc | 5511 | { |
976ca316 SM |
5512 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
5513 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
17ee85fc TT |
5514 | |
5515 | if (per_bfd->partial_symtabs != nullptr) | |
5516 | { | |
5517 | /* Partial symbols were already read, so now we can simply | |
5518 | attach them. */ | |
eb36a3eb TT |
5519 | if (psf == nullptr) |
5520 | { | |
5521 | psf = new psymbol_functions (per_bfd->partial_symtabs); | |
5522 | objfile->qf.emplace_front (psf); | |
5523 | } | |
5524 | else | |
5525 | psf->set_partial_symtabs (per_bfd->partial_symtabs); | |
976ca316 | 5526 | per_objfile->resize_symtabs (); |
17ee85fc TT |
5527 | return; |
5528 | } | |
c9bf0622 | 5529 | |
eb36a3eb TT |
5530 | if (psf == nullptr) |
5531 | { | |
5532 | psf = new psymbol_functions; | |
5533 | objfile->qf.emplace_front (psf); | |
5534 | } | |
5535 | const std::shared_ptr<psymtab_storage> &partial_symtabs | |
5536 | = psf->get_partial_symtabs (); | |
5537 | ||
51962708 TT |
5538 | /* Set the local reference to partial symtabs, so that we don't try |
5539 | to read them again if reading another objfile with the same BFD. | |
5540 | If we can't in fact share, this won't make a difference anyway as | |
5541 | the dwarf2_per_bfd object won't be shared. */ | |
eb36a3eb | 5542 | per_bfd->partial_symtabs = partial_symtabs; |
51962708 | 5543 | |
a70b8144 | 5544 | try |
c9bf0622 TT |
5545 | { |
5546 | /* This isn't really ideal: all the data we allocate on the | |
5547 | objfile's obstack is still uselessly kept around. However, | |
5548 | freeing it seems unsafe. */ | |
eb36a3eb | 5549 | psymtab_discarder psymtabs (partial_symtabs.get ()); |
976ca316 | 5550 | dwarf2_build_psymtabs_hard (per_objfile); |
906768f9 | 5551 | psymtabs.keep (); |
87d6a7aa | 5552 | |
976ca316 | 5553 | per_objfile->resize_symtabs (); |
af758d11 | 5554 | |
87d6a7aa | 5555 | /* (maybe) store an index in the cache. */ |
976ca316 | 5556 | global_index_cache.store (per_objfile); |
c9bf0622 | 5557 | } |
230d2906 | 5558 | catch (const gdb_exception_error &except) |
492d29ea PA |
5559 | { |
5560 | exception_print (gdb_stderr, except); | |
5561 | } | |
c906108c | 5562 | } |
c906108c | 5563 | |
3b80fe9b DE |
5564 | /* Find the base address of the compilation unit for range lists and |
5565 | location lists. It will normally be specified by DW_AT_low_pc. | |
5566 | In DWARF-3 draft 4, the base address could be overridden by | |
5567 | DW_AT_entry_pc. It's been removed, but GCC still uses this for | |
5568 | compilation units with discontinuous ranges. */ | |
5569 | ||
5570 | static void | |
5571 | dwarf2_find_base_address (struct die_info *die, struct dwarf2_cu *cu) | |
5572 | { | |
5573 | struct attribute *attr; | |
5574 | ||
2b24b6e4 | 5575 | cu->base_address.reset (); |
3b80fe9b DE |
5576 | |
5577 | attr = dwarf2_attr (die, DW_AT_entry_pc, cu); | |
435d3d88 | 5578 | if (attr != nullptr) |
95f982e5 | 5579 | cu->base_address = attr->as_address (); |
3b80fe9b DE |
5580 | else |
5581 | { | |
5582 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
435d3d88 | 5583 | if (attr != nullptr) |
95f982e5 | 5584 | cu->base_address = attr->as_address (); |
3b80fe9b DE |
5585 | } |
5586 | } | |
5587 | ||
36586728 TT |
5588 | /* Helper function that returns the proper abbrev section for |
5589 | THIS_CU. */ | |
5590 | ||
5591 | static struct dwarf2_section_info * | |
5592 | get_abbrev_section_for_cu (struct dwarf2_per_cu_data *this_cu) | |
5593 | { | |
5594 | struct dwarf2_section_info *abbrev; | |
c3699833 | 5595 | dwarf2_per_bfd *per_bfd = this_cu->per_bfd; |
36586728 TT |
5596 | |
5597 | if (this_cu->is_dwz) | |
a7308ce0 | 5598 | abbrev = &dwarf2_get_dwz_file (per_bfd, true)->abbrev; |
36586728 | 5599 | else |
c3699833 | 5600 | abbrev = &per_bfd->abbrev; |
36586728 TT |
5601 | |
5602 | return abbrev; | |
5603 | } | |
5604 | ||
f4dc4d17 DE |
5605 | /* Fetch the abbreviation table offset from a comp or type unit header. */ |
5606 | ||
5607 | static sect_offset | |
976ca316 | 5608 | read_abbrev_offset (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 5609 | struct dwarf2_section_info *section, |
9c541725 | 5610 | sect_offset sect_off) |
f4dc4d17 | 5611 | { |
96b79293 | 5612 | bfd *abfd = section->get_bfd_owner (); |
d521ce57 | 5613 | const gdb_byte *info_ptr; |
ac298888 | 5614 | unsigned int initial_length_size, offset_size; |
43988095 | 5615 | uint16_t version; |
f4dc4d17 | 5616 | |
976ca316 | 5617 | section->read (per_objfile->objfile); |
9c541725 | 5618 | info_ptr = section->buffer + to_underlying (sect_off); |
ac298888 | 5619 | read_initial_length (abfd, info_ptr, &initial_length_size); |
f4dc4d17 | 5620 | offset_size = initial_length_size == 4 ? 4 : 8; |
43988095 JK |
5621 | info_ptr += initial_length_size; |
5622 | ||
5623 | version = read_2_bytes (abfd, info_ptr); | |
5624 | info_ptr += 2; | |
5625 | if (version >= 5) | |
5626 | { | |
5627 | /* Skip unit type and address size. */ | |
5628 | info_ptr += 2; | |
5629 | } | |
5630 | ||
24aa364d | 5631 | return (sect_offset) read_offset (abfd, info_ptr, offset_size); |
f4dc4d17 DE |
5632 | } |
5633 | ||
b83470bf TT |
5634 | /* A partial symtab that is used only for include files. */ |
5635 | struct dwarf2_include_psymtab : public partial_symtab | |
5636 | { | |
7b249e47 TT |
5637 | dwarf2_include_psymtab (const char *filename, |
5638 | psymtab_storage *partial_symtabs, | |
0072c873 SM |
5639 | objfile_per_bfd_storage *objfile_per_bfd) |
5640 | : partial_symtab (filename, partial_symtabs, objfile_per_bfd) | |
b83470bf TT |
5641 | { |
5642 | } | |
5643 | ||
5644 | void read_symtab (struct objfile *objfile) override | |
5645 | { | |
194d088f TV |
5646 | /* It's an include file, no symbols to read for it. |
5647 | Everything is in the includer symtab. */ | |
5648 | ||
5649 | /* The expansion of a dwarf2_include_psymtab is just a trigger for | |
5650 | expansion of the includer psymtab. We use the dependencies[0] field to | |
5651 | model the includer. But if we go the regular route of calling | |
5652 | expand_psymtab here, and having expand_psymtab call expand_dependencies | |
5653 | to expand the includer, we'll only use expand_psymtab on the includer | |
5654 | (making it a non-toplevel psymtab), while if we expand the includer via | |
5655 | another path, we'll use read_symtab (making it a toplevel psymtab). | |
5656 | So, don't pretend a dwarf2_include_psymtab is an actual toplevel | |
5657 | psymtab, and trigger read_symtab on the includer here directly. */ | |
5658 | includer ()->read_symtab (objfile); | |
b83470bf TT |
5659 | } |
5660 | ||
5661 | void expand_psymtab (struct objfile *objfile) override | |
5662 | { | |
194d088f TV |
5663 | /* This is not called by read_symtab, and should not be called by any |
5664 | expand_dependencies. */ | |
5665 | gdb_assert (false); | |
b83470bf TT |
5666 | } |
5667 | ||
5717c425 | 5668 | bool readin_p (struct objfile *objfile) const override |
b83470bf | 5669 | { |
5717c425 | 5670 | return includer ()->readin_p (objfile); |
b83470bf TT |
5671 | } |
5672 | ||
5717c425 | 5673 | compunit_symtab *get_compunit_symtab (struct objfile *objfile) const override |
b83470bf TT |
5674 | { |
5675 | return nullptr; | |
5676 | } | |
5677 | ||
5678 | private: | |
194d088f TV |
5679 | partial_symtab *includer () const |
5680 | { | |
5681 | /* An include psymtab has exactly one dependency: the psymtab that | |
5682 | includes it. */ | |
5683 | gdb_assert (this->number_of_dependencies == 1); | |
5684 | return this->dependencies[0]; | |
5685 | } | |
b83470bf TT |
5686 | }; |
5687 | ||
aaa75496 JB |
5688 | /* Allocate a new partial symtab for file named NAME and mark this new |
5689 | partial symtab as being an include of PST. */ | |
5690 | ||
5691 | static void | |
84685904 | 5692 | dwarf2_create_include_psymtab (dwarf2_per_bfd *per_bfd, |
7b249e47 TT |
5693 | const char *name, |
5694 | dwarf2_psymtab *pst, | |
5695 | psymtab_storage *partial_symtabs, | |
0072c873 | 5696 | objfile_per_bfd_storage *objfile_per_bfd) |
aaa75496 | 5697 | { |
7b249e47 | 5698 | dwarf2_include_psymtab *subpst |
0072c873 | 5699 | = new dwarf2_include_psymtab (name, partial_symtabs, objfile_per_bfd); |
aaa75496 | 5700 | |
fbd9ab74 | 5701 | if (!IS_ABSOLUTE_PATH (subpst->filename)) |
45940949 | 5702 | subpst->dirname = pst->dirname; |
fbd9ab74 | 5703 | |
84685904 | 5704 | subpst->dependencies = per_bfd->partial_symtabs->allocate_dependencies (1); |
aaa75496 JB |
5705 | subpst->dependencies[0] = pst; |
5706 | subpst->number_of_dependencies = 1; | |
aaa75496 JB |
5707 | } |
5708 | ||
5709 | /* Read the Line Number Program data and extract the list of files | |
5710 | included by the source file represented by PST. Build an include | |
d85a05f0 | 5711 | partial symtab for each of these included files. */ |
aaa75496 JB |
5712 | |
5713 | static void | |
5714 | dwarf2_build_include_psymtabs (struct dwarf2_cu *cu, | |
dee91e82 | 5715 | struct die_info *die, |
891813be | 5716 | dwarf2_psymtab *pst) |
aaa75496 | 5717 | { |
fff8551c | 5718 | line_header_up lh; |
d85a05f0 | 5719 | struct attribute *attr; |
aaa75496 | 5720 | |
d85a05f0 | 5721 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
d4df075e TT |
5722 | if (attr != nullptr && attr->form_is_unsigned ()) |
5723 | lh = dwarf_decode_line_header ((sect_offset) attr->as_unsigned (), cu); | |
aaa75496 JB |
5724 | if (lh == NULL) |
5725 | return; /* No linetable, so no includes. */ | |
5726 | ||
79748972 TT |
5727 | /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note |
5728 | that we pass in the raw text_low here; that is ok because we're | |
5729 | only decoding the line table to make include partial symtabs, and | |
5730 | so the addresses aren't really used. */ | |
4ae976d1 | 5731 | dwarf_decode_lines (lh.get (), pst->dirname, cu, pst, |
79748972 | 5732 | pst->raw_text_low (), 1); |
aaa75496 JB |
5733 | } |
5734 | ||
348e048f | 5735 | static hashval_t |
52dc124a | 5736 | hash_signatured_type (const void *item) |
348e048f | 5737 | { |
9a3c8263 SM |
5738 | const struct signatured_type *sig_type |
5739 | = (const struct signatured_type *) item; | |
9a619af0 | 5740 | |
348e048f | 5741 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
52dc124a | 5742 | return sig_type->signature; |
348e048f DE |
5743 | } |
5744 | ||
5745 | static int | |
52dc124a | 5746 | eq_signatured_type (const void *item_lhs, const void *item_rhs) |
348e048f | 5747 | { |
9a3c8263 SM |
5748 | const struct signatured_type *lhs = (const struct signatured_type *) item_lhs; |
5749 | const struct signatured_type *rhs = (const struct signatured_type *) item_rhs; | |
9a619af0 | 5750 | |
348e048f DE |
5751 | return lhs->signature == rhs->signature; |
5752 | } | |
5753 | ||
1fd400ff TT |
5754 | /* Allocate a hash table for signatured types. */ |
5755 | ||
b0b6a987 | 5756 | static htab_up |
298e9637 | 5757 | allocate_signatured_type_table () |
1fd400ff | 5758 | { |
b0b6a987 TT |
5759 | return htab_up (htab_create_alloc (41, |
5760 | hash_signatured_type, | |
5761 | eq_signatured_type, | |
5762 | NULL, xcalloc, xfree)); | |
1fd400ff TT |
5763 | } |
5764 | ||
78d4d2c5 | 5765 | /* A helper for create_debug_types_hash_table. Read types from SECTION |
43988095 JK |
5766 | and fill them into TYPES_HTAB. It will process only type units, |
5767 | therefore DW_UT_type. */ | |
c88ee1f0 | 5768 | |
78d4d2c5 | 5769 | static void |
976ca316 | 5770 | create_debug_type_hash_table (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 5771 | struct dwo_file *dwo_file, |
b0b6a987 | 5772 | dwarf2_section_info *section, htab_up &types_htab, |
43988095 | 5773 | rcuh_kind section_kind) |
348e048f | 5774 | { |
976ca316 | 5775 | struct objfile *objfile = per_objfile->objfile; |
4bdcc0c1 | 5776 | struct dwarf2_section_info *abbrev_section; |
78d4d2c5 JK |
5777 | bfd *abfd; |
5778 | const gdb_byte *info_ptr, *end_ptr; | |
348e048f | 5779 | |
b8efb248 | 5780 | abbrev_section = &dwo_file->sections.abbrev; |
4bdcc0c1 | 5781 | |
4800761a | 5782 | dwarf_read_debug_printf ("Reading %s for %s", |
6f738b01 SM |
5783 | section->get_name (), |
5784 | abbrev_section->get_file_name ()); | |
09406207 | 5785 | |
96b79293 | 5786 | section->read (objfile); |
78d4d2c5 | 5787 | info_ptr = section->buffer; |
348e048f | 5788 | |
78d4d2c5 JK |
5789 | if (info_ptr == NULL) |
5790 | return; | |
348e048f | 5791 | |
78d4d2c5 JK |
5792 | /* We can't set abfd until now because the section may be empty or |
5793 | not present, in which case the bfd is unknown. */ | |
96b79293 | 5794 | abfd = section->get_bfd_owner (); |
348e048f | 5795 | |
c0ab21c2 TT |
5796 | /* We don't use cutu_reader here because we don't need to read |
5797 | any dies: the signature is in the header. */ | |
3019eac3 | 5798 | |
78d4d2c5 JK |
5799 | end_ptr = info_ptr + section->size; |
5800 | while (info_ptr < end_ptr) | |
5801 | { | |
0d305d5c | 5802 | std::unique_ptr<signatured_type> sig_type; |
78d4d2c5 JK |
5803 | struct dwo_unit *dwo_tu; |
5804 | void **slot; | |
5805 | const gdb_byte *ptr = info_ptr; | |
5806 | struct comp_unit_head header; | |
5807 | unsigned int length; | |
8b70b953 | 5808 | |
9c541725 | 5809 | sect_offset sect_off = (sect_offset) (ptr - section->buffer); |
348e048f | 5810 | |
a49dd8dd JK |
5811 | /* Initialize it due to a false compiler warning. */ |
5812 | header.signature = -1; | |
9c541725 | 5813 | header.type_cu_offset_in_tu = (cu_offset) -1; |
a49dd8dd | 5814 | |
78d4d2c5 JK |
5815 | /* We need to read the type's signature in order to build the hash |
5816 | table, but we don't need anything else just yet. */ | |
348e048f | 5817 | |
976ca316 | 5818 | ptr = read_and_check_comp_unit_head (per_objfile, &header, section, |
43988095 | 5819 | abbrev_section, ptr, section_kind); |
348e048f | 5820 | |
4057dfde | 5821 | length = header.get_length (); |
6caca83c | 5822 | |
78d4d2c5 JK |
5823 | /* Skip dummy type units. */ |
5824 | if (ptr >= info_ptr + length | |
43988095 | 5825 | || peek_abbrev_code (abfd, ptr) == 0 |
d2854d8d CT |
5826 | || (header.unit_type != DW_UT_type |
5827 | && header.unit_type != DW_UT_split_type)) | |
78d4d2c5 JK |
5828 | { |
5829 | info_ptr += length; | |
5830 | continue; | |
5831 | } | |
dee91e82 | 5832 | |
78d4d2c5 | 5833 | if (types_htab == NULL) |
b8efb248 | 5834 | types_htab = allocate_dwo_unit_table (); |
8b70b953 | 5835 | |
b8efb248 TT |
5836 | dwo_tu = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, dwo_unit); |
5837 | dwo_tu->dwo_file = dwo_file; | |
5838 | dwo_tu->signature = header.signature; | |
5839 | dwo_tu->type_offset_in_tu = header.type_cu_offset_in_tu; | |
5840 | dwo_tu->section = section; | |
5841 | dwo_tu->sect_off = sect_off; | |
5842 | dwo_tu->length = length; | |
78d4d2c5 | 5843 | |
b8efb248 | 5844 | slot = htab_find_slot (types_htab.get (), dwo_tu, INSERT); |
78d4d2c5 JK |
5845 | gdb_assert (slot != NULL); |
5846 | if (*slot != NULL) | |
b8efb248 TT |
5847 | complaint (_("debug type entry at offset %s is duplicate to" |
5848 | " the entry at offset %s, signature %s"), | |
5849 | sect_offset_str (sect_off), | |
5850 | sect_offset_str (dwo_tu->sect_off), | |
5851 | hex_string (header.signature)); | |
5852 | *slot = dwo_tu; | |
3019eac3 | 5853 | |
6f738b01 SM |
5854 | dwarf_read_debug_printf_v (" offset %s, signature %s", |
5855 | sect_offset_str (sect_off), | |
5856 | hex_string (header.signature)); | |
3019eac3 | 5857 | |
78d4d2c5 JK |
5858 | info_ptr += length; |
5859 | } | |
5860 | } | |
3019eac3 | 5861 | |
78d4d2c5 JK |
5862 | /* Create the hash table of all entries in the .debug_types |
5863 | (or .debug_types.dwo) section(s). | |
b8efb248 | 5864 | DWO_FILE is a pointer to the DWO file object. |
b3c8eb43 | 5865 | |
78d4d2c5 | 5866 | The result is a pointer to the hash table or NULL if there are no types. |
348e048f | 5867 | |
78d4d2c5 | 5868 | Note: This function processes DWO files only, not DWP files. */ |
348e048f | 5869 | |
78d4d2c5 | 5870 | static void |
976ca316 | 5871 | create_debug_types_hash_table (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 5872 | struct dwo_file *dwo_file, |
fd5866f6 | 5873 | gdb::array_view<dwarf2_section_info> type_sections, |
b0b6a987 | 5874 | htab_up &types_htab) |
78d4d2c5 | 5875 | { |
fd5866f6 | 5876 | for (dwarf2_section_info §ion : type_sections) |
976ca316 SM |
5877 | create_debug_type_hash_table (per_objfile, dwo_file, §ion, types_htab, |
5878 | rcuh_kind::TYPE); | |
3019eac3 DE |
5879 | } |
5880 | ||
5989a64e | 5881 | /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types. |
6aa5f3a6 DE |
5882 | If SLOT is non-NULL, it is the entry to use in the hash table. |
5883 | Otherwise we find one. */ | |
5884 | ||
5885 | static struct signatured_type * | |
976ca316 | 5886 | add_type_unit (dwarf2_per_objfile *per_objfile, ULONGEST sig, void **slot) |
6aa5f3a6 | 5887 | { |
91eea9cc TT |
5888 | if (per_objfile->per_bfd->all_comp_units.size () |
5889 | == per_objfile->per_bfd->all_comp_units.capacity ()) | |
976ca316 | 5890 | ++per_objfile->per_bfd->tu_stats.nr_all_type_units_reallocs; |
6aa5f3a6 | 5891 | |
0d305d5c TT |
5892 | std::unique_ptr<signatured_type> sig_type_holder |
5893 | = per_objfile->per_bfd->allocate_signatured_type (); | |
5894 | signatured_type *sig_type = sig_type_holder.get (); | |
b2bdb8cf | 5895 | |
976ca316 | 5896 | per_objfile->resize_symtabs (); |
af758d11 | 5897 | |
473ab964 TT |
5898 | per_objfile->per_bfd->all_comp_units.emplace_back |
5899 | (sig_type_holder.release ()); | |
6aa5f3a6 | 5900 | sig_type->signature = sig; |
0d305d5c | 5901 | sig_type->is_debug_types = 1; |
976ca316 | 5902 | if (per_objfile->per_bfd->using_index) |
6aa5f3a6 | 5903 | { |
0d305d5c | 5904 | sig_type->v.quick = |
976ca316 | 5905 | OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, |
6aa5f3a6 DE |
5906 | struct dwarf2_per_cu_quick_data); |
5907 | } | |
5908 | ||
5909 | if (slot == NULL) | |
5910 | { | |
976ca316 | 5911 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
6aa5f3a6 DE |
5912 | sig_type, INSERT); |
5913 | } | |
5914 | gdb_assert (*slot == NULL); | |
5915 | *slot = sig_type; | |
5916 | /* The rest of sig_type must be filled in by the caller. */ | |
5917 | return sig_type; | |
5918 | } | |
5919 | ||
a2ce51a0 DE |
5920 | /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type. |
5921 | Fill in SIG_ENTRY with DWO_ENTRY. */ | |
5922 | ||
5923 | static void | |
976ca316 | 5924 | fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile *per_objfile, |
a2ce51a0 DE |
5925 | struct signatured_type *sig_entry, |
5926 | struct dwo_unit *dwo_entry) | |
5927 | { | |
976ca316 | 5928 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
1859c670 | 5929 | |
7ee85ab1 | 5930 | /* Make sure we're not clobbering something we don't expect to. */ |
0d305d5c TT |
5931 | gdb_assert (! sig_entry->queued); |
5932 | gdb_assert (per_objfile->get_cu (sig_entry) == NULL); | |
1859c670 | 5933 | if (per_bfd->using_index) |
6aa5f3a6 | 5934 | { |
0d305d5c TT |
5935 | gdb_assert (sig_entry->v.quick != NULL); |
5936 | gdb_assert (!per_objfile->symtab_set_p (sig_entry)); | |
6aa5f3a6 DE |
5937 | } |
5938 | else | |
0d305d5c | 5939 | gdb_assert (sig_entry->v.psymtab == NULL); |
a2ce51a0 | 5940 | gdb_assert (sig_entry->signature == dwo_entry->signature); |
9c541725 | 5941 | gdb_assert (to_underlying (sig_entry->type_offset_in_section) == 0); |
a2ce51a0 | 5942 | gdb_assert (sig_entry->type_unit_group == NULL); |
7ee85ab1 DE |
5943 | gdb_assert (sig_entry->dwo_unit == NULL); |
5944 | ||
0d305d5c TT |
5945 | sig_entry->section = dwo_entry->section; |
5946 | sig_entry->sect_off = dwo_entry->sect_off; | |
5947 | sig_entry->length = dwo_entry->length; | |
5948 | sig_entry->reading_dwo_directly = 1; | |
5949 | sig_entry->per_bfd = per_bfd; | |
a2ce51a0 DE |
5950 | sig_entry->type_offset_in_tu = dwo_entry->type_offset_in_tu; |
5951 | sig_entry->dwo_unit = dwo_entry; | |
5952 | } | |
5953 | ||
5954 | /* Subroutine of lookup_signatured_type. | |
7ee85ab1 DE |
5955 | If we haven't read the TU yet, create the signatured_type data structure |
5956 | for a TU to be read in directly from a DWO file, bypassing the stub. | |
5957 | This is the "Stay in DWO Optimization": When there is no DWP file and we're | |
5958 | using .gdb_index, then when reading a CU we want to stay in the DWO file | |
5959 | containing that CU. Otherwise we could end up reading several other DWO | |
5960 | files (due to comdat folding) to process the transitive closure of all the | |
5961 | mentioned TUs, and that can be slow. The current DWO file will have every | |
5962 | type signature that it needs. | |
a2ce51a0 DE |
5963 | We only do this for .gdb_index because in the psymtab case we already have |
5964 | to read all the DWOs to build the type unit groups. */ | |
5965 | ||
5966 | static struct signatured_type * | |
5967 | lookup_dwo_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
5968 | { | |
976ca316 | 5969 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a2ce51a0 DE |
5970 | struct dwo_file *dwo_file; |
5971 | struct dwo_unit find_dwo_entry, *dwo_entry; | |
5972 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 5973 | void **slot; |
a2ce51a0 | 5974 | |
976ca316 | 5975 | gdb_assert (cu->dwo_unit && per_objfile->per_bfd->using_index); |
a2ce51a0 | 5976 | |
6aa5f3a6 DE |
5977 | /* If TU skeletons have been removed then we may not have read in any |
5978 | TUs yet. */ | |
976ca316 SM |
5979 | if (per_objfile->per_bfd->signatured_types == NULL) |
5980 | per_objfile->per_bfd->signatured_types = allocate_signatured_type_table (); | |
a2ce51a0 DE |
5981 | |
5982 | /* We only ever need to read in one copy of a signatured type. | |
6aa5f3a6 DE |
5983 | Use the global signatured_types array to do our own comdat-folding |
5984 | of types. If this is the first time we're reading this TU, and | |
5985 | the TU has an entry in .gdb_index, replace the recorded data from | |
5986 | .gdb_index with this TU. */ | |
a2ce51a0 | 5987 | |
a2ce51a0 | 5988 | find_sig_entry.signature = sig; |
976ca316 | 5989 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
6aa5f3a6 | 5990 | &find_sig_entry, INSERT); |
9a3c8263 | 5991 | sig_entry = (struct signatured_type *) *slot; |
7ee85ab1 DE |
5992 | |
5993 | /* We can get here with the TU already read, *or* in the process of being | |
6aa5f3a6 DE |
5994 | read. Don't reassign the global entry to point to this DWO if that's |
5995 | the case. Also note that if the TU is already being read, it may not | |
5996 | have come from a DWO, the program may be a mix of Fission-compiled | |
5997 | code and non-Fission-compiled code. */ | |
5998 | ||
5999 | /* Have we already tried to read this TU? | |
6000 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6001 | needn't exist in the global table yet). */ | |
0d305d5c | 6002 | if (sig_entry != NULL && sig_entry->tu_read) |
a2ce51a0 DE |
6003 | return sig_entry; |
6004 | ||
6aa5f3a6 DE |
6005 | /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the |
6006 | dwo_unit of the TU itself. */ | |
6007 | dwo_file = cu->dwo_unit->dwo_file; | |
6008 | ||
a2ce51a0 DE |
6009 | /* Ok, this is the first time we're reading this TU. */ |
6010 | if (dwo_file->tus == NULL) | |
6011 | return NULL; | |
6012 | find_dwo_entry.signature = sig; | |
b0b6a987 TT |
6013 | dwo_entry = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
6014 | &find_dwo_entry); | |
a2ce51a0 DE |
6015 | if (dwo_entry == NULL) |
6016 | return NULL; | |
6017 | ||
6aa5f3a6 DE |
6018 | /* If the global table doesn't have an entry for this TU, add one. */ |
6019 | if (sig_entry == NULL) | |
976ca316 | 6020 | sig_entry = add_type_unit (per_objfile, sig, slot); |
6aa5f3a6 | 6021 | |
976ca316 | 6022 | fill_in_sig_entry_from_dwo_entry (per_objfile, sig_entry, dwo_entry); |
0d305d5c | 6023 | sig_entry->tu_read = 1; |
a2ce51a0 DE |
6024 | return sig_entry; |
6025 | } | |
6026 | ||
a2ce51a0 DE |
6027 | /* Subroutine of lookup_signatured_type. |
6028 | Look up the type for signature SIG, and if we can't find SIG in .gdb_index | |
6aa5f3a6 DE |
6029 | then try the DWP file. If the TU stub (skeleton) has been removed then |
6030 | it won't be in .gdb_index. */ | |
a2ce51a0 DE |
6031 | |
6032 | static struct signatured_type * | |
6033 | lookup_dwp_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) | |
6034 | { | |
976ca316 SM |
6035 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
6036 | struct dwp_file *dwp_file = get_dwp_file (per_objfile); | |
a2ce51a0 DE |
6037 | struct dwo_unit *dwo_entry; |
6038 | struct signatured_type find_sig_entry, *sig_entry; | |
6aa5f3a6 | 6039 | void **slot; |
a2ce51a0 | 6040 | |
976ca316 | 6041 | gdb_assert (cu->dwo_unit && per_objfile->per_bfd->using_index); |
a2ce51a0 DE |
6042 | gdb_assert (dwp_file != NULL); |
6043 | ||
6aa5f3a6 DE |
6044 | /* If TU skeletons have been removed then we may not have read in any |
6045 | TUs yet. */ | |
976ca316 SM |
6046 | if (per_objfile->per_bfd->signatured_types == NULL) |
6047 | per_objfile->per_bfd->signatured_types = allocate_signatured_type_table (); | |
a2ce51a0 | 6048 | |
6aa5f3a6 | 6049 | find_sig_entry.signature = sig; |
976ca316 | 6050 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
6aa5f3a6 | 6051 | &find_sig_entry, INSERT); |
9a3c8263 | 6052 | sig_entry = (struct signatured_type *) *slot; |
6aa5f3a6 DE |
6053 | |
6054 | /* Have we already tried to read this TU? | |
6055 | Note: sig_entry can be NULL if the skeleton TU was removed (thus it | |
6056 | needn't exist in the global table yet). */ | |
6057 | if (sig_entry != NULL) | |
6058 | return sig_entry; | |
6059 | ||
a2ce51a0 DE |
6060 | if (dwp_file->tus == NULL) |
6061 | return NULL; | |
976ca316 SM |
6062 | dwo_entry = lookup_dwo_unit_in_dwp (per_objfile, dwp_file, NULL, sig, |
6063 | 1 /* is_debug_types */); | |
a2ce51a0 DE |
6064 | if (dwo_entry == NULL) |
6065 | return NULL; | |
6066 | ||
976ca316 SM |
6067 | sig_entry = add_type_unit (per_objfile, sig, slot); |
6068 | fill_in_sig_entry_from_dwo_entry (per_objfile, sig_entry, dwo_entry); | |
a2ce51a0 | 6069 | |
a2ce51a0 DE |
6070 | return sig_entry; |
6071 | } | |
6072 | ||
380bca97 | 6073 | /* Lookup a signature based type for DW_FORM_ref_sig8. |
5a8b3f62 DE |
6074 | Returns NULL if signature SIG is not present in the table. |
6075 | It is up to the caller to complain about this. */ | |
348e048f DE |
6076 | |
6077 | static struct signatured_type * | |
a2ce51a0 | 6078 | lookup_signatured_type (struct dwarf2_cu *cu, ULONGEST sig) |
348e048f | 6079 | { |
976ca316 | 6080 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ed2dc618 | 6081 | |
976ca316 | 6082 | if (cu->dwo_unit && per_objfile->per_bfd->using_index) |
a2ce51a0 DE |
6083 | { |
6084 | /* We're in a DWO/DWP file, and we're using .gdb_index. | |
6085 | These cases require special processing. */ | |
976ca316 | 6086 | if (get_dwp_file (per_objfile) == NULL) |
a2ce51a0 DE |
6087 | return lookup_dwo_signatured_type (cu, sig); |
6088 | else | |
6089 | return lookup_dwp_signatured_type (cu, sig); | |
6090 | } | |
6091 | else | |
6092 | { | |
6093 | struct signatured_type find_entry, *entry; | |
348e048f | 6094 | |
976ca316 | 6095 | if (per_objfile->per_bfd->signatured_types == NULL) |
a2ce51a0 DE |
6096 | return NULL; |
6097 | find_entry.signature = sig; | |
9a3c8263 | 6098 | entry = ((struct signatured_type *) |
976ca316 | 6099 | htab_find (per_objfile->per_bfd->signatured_types.get (), |
b0b6a987 | 6100 | &find_entry)); |
a2ce51a0 DE |
6101 | return entry; |
6102 | } | |
348e048f | 6103 | } |
18a8505e | 6104 | |
42e7ad6c | 6105 | /* Low level DIE reading support. */ |
348e048f | 6106 | |
d85a05f0 DJ |
6107 | /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */ |
6108 | ||
6109 | static void | |
6110 | init_cu_die_reader (struct die_reader_specs *reader, | |
dee91e82 | 6111 | struct dwarf2_cu *cu, |
3019eac3 | 6112 | struct dwarf2_section_info *section, |
685af9cd TT |
6113 | struct dwo_file *dwo_file, |
6114 | struct abbrev_table *abbrev_table) | |
d85a05f0 | 6115 | { |
fceca515 | 6116 | gdb_assert (section->readin && section->buffer != NULL); |
96b79293 | 6117 | reader->abfd = section->get_bfd_owner (); |
d85a05f0 | 6118 | reader->cu = cu; |
3019eac3 | 6119 | reader->dwo_file = dwo_file; |
dee91e82 DE |
6120 | reader->die_section = section; |
6121 | reader->buffer = section->buffer; | |
f664829e | 6122 | reader->buffer_end = section->buffer + section->size; |
685af9cd | 6123 | reader->abbrev_table = abbrev_table; |
d85a05f0 DJ |
6124 | } |
6125 | ||
c0ab21c2 | 6126 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6127 | Read in the rest of a CU/TU top level DIE from DWO_UNIT. |
c0ab21c2 | 6128 | There's just a lot of work to do, and cutu_reader is big enough |
b0c7bfa9 DE |
6129 | already. |
6130 | ||
6131 | STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes | |
6132 | from it to the DIE in the DWO. If NULL we are skipping the stub. | |
a2ce51a0 DE |
6133 | STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly |
6134 | from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir | |
c54a1dd8 DE |
6135 | attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and |
6136 | STUB_COMP_DIR may be non-NULL. | |
3e225074 | 6137 | *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE |
b0c7bfa9 | 6138 | are filled in with the info of the DIE from the DWO file. |
685af9cd TT |
6139 | *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated |
6140 | from the dwo. Since *RESULT_READER references this abbrev table, it must be | |
6141 | kept around for at least as long as *RESULT_READER. | |
6142 | ||
b0c7bfa9 DE |
6143 | The result is non-zero if a valid (non-dummy) DIE was found. */ |
6144 | ||
6145 | static int | |
4ab09049 | 6146 | read_cutu_die_from_dwo (dwarf2_cu *cu, |
b0c7bfa9 | 6147 | struct dwo_unit *dwo_unit, |
b0c7bfa9 | 6148 | struct die_info *stub_comp_unit_die, |
a2ce51a0 | 6149 | const char *stub_comp_dir, |
b0c7bfa9 | 6150 | struct die_reader_specs *result_reader, |
d521ce57 | 6151 | const gdb_byte **result_info_ptr, |
b0c7bfa9 | 6152 | struct die_info **result_comp_unit_die, |
685af9cd | 6153 | abbrev_table_up *result_dwo_abbrev_table) |
b0c7bfa9 | 6154 | { |
976ca316 | 6155 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
4ab09049 | 6156 | dwarf2_per_cu_data *per_cu = cu->per_cu; |
976ca316 | 6157 | struct objfile *objfile = per_objfile->objfile; |
b0c7bfa9 | 6158 | bfd *abfd; |
d521ce57 | 6159 | const gdb_byte *begin_info_ptr, *info_ptr; |
b0c7bfa9 DE |
6160 | struct attribute *comp_dir, *stmt_list, *low_pc, *high_pc, *ranges; |
6161 | int i,num_extra_attrs; | |
6162 | struct dwarf2_section_info *dwo_abbrev_section; | |
b0c7bfa9 DE |
6163 | struct die_info *comp_unit_die; |
6164 | ||
b0aeadb3 DE |
6165 | /* At most one of these may be provided. */ |
6166 | gdb_assert ((stub_comp_unit_die != NULL) + (stub_comp_dir != NULL) <= 1); | |
a2ce51a0 | 6167 | |
b0c7bfa9 DE |
6168 | /* These attributes aren't processed until later: |
6169 | DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges. | |
0d60c288 DE |
6170 | DW_AT_comp_dir is used now, to find the DWO file, but it is also |
6171 | referenced later. However, these attributes are found in the stub | |
6172 | which we won't have later. In order to not impose this complication | |
6173 | on the rest of the code, we read them here and copy them to the | |
6174 | DWO CU/TU die. */ | |
b0c7bfa9 DE |
6175 | |
6176 | stmt_list = NULL; | |
6177 | low_pc = NULL; | |
6178 | high_pc = NULL; | |
6179 | ranges = NULL; | |
6180 | comp_dir = NULL; | |
6181 | ||
6182 | if (stub_comp_unit_die != NULL) | |
6183 | { | |
6184 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
6185 | DWO file. */ | |
4ab09049 | 6186 | if (!per_cu->is_debug_types) |
b0c7bfa9 DE |
6187 | stmt_list = dwarf2_attr (stub_comp_unit_die, DW_AT_stmt_list, cu); |
6188 | low_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_low_pc, cu); | |
6189 | high_pc = dwarf2_attr (stub_comp_unit_die, DW_AT_high_pc, cu); | |
6190 | ranges = dwarf2_attr (stub_comp_unit_die, DW_AT_ranges, cu); | |
6191 | comp_dir = dwarf2_attr (stub_comp_unit_die, DW_AT_comp_dir, cu); | |
6192 | ||
a39fdb41 | 6193 | cu->addr_base = stub_comp_unit_die->addr_base (); |
b0c7bfa9 | 6194 | |
2b0c7f41 SM |
6195 | /* There should be a DW_AT_GNU_ranges_base attribute here (if needed). |
6196 | We need the value before we can process DW_AT_ranges values from the | |
6197 | DWO. */ | |
6198 | cu->gnu_ranges_base = stub_comp_unit_die->gnu_ranges_base (); | |
6199 | ||
6200 | /* For DWARF5: record the DW_AT_rnglists_base value from the skeleton. If | |
6201 | there are attributes of form DW_FORM_rnglistx in the skeleton, they'll | |
6202 | need the rnglists base. Attributes of form DW_FORM_rnglistx in the | |
6203 | split unit don't use it, as the DWO has its own .debug_rnglists.dwo | |
6204 | section. */ | |
6205 | cu->rnglists_base = stub_comp_unit_die->rnglists_base (); | |
b0c7bfa9 | 6206 | } |
a2ce51a0 DE |
6207 | else if (stub_comp_dir != NULL) |
6208 | { | |
6209 | /* Reconstruct the comp_dir attribute to simplify the code below. */ | |
fe56917a | 6210 | comp_dir = OBSTACK_ZALLOC (&cu->comp_unit_obstack, struct attribute); |
a2ce51a0 DE |
6211 | comp_dir->name = DW_AT_comp_dir; |
6212 | comp_dir->form = DW_FORM_string; | |
c6481205 | 6213 | comp_dir->set_string_noncanonical (stub_comp_dir); |
a2ce51a0 | 6214 | } |
b0c7bfa9 DE |
6215 | |
6216 | /* Set up for reading the DWO CU/TU. */ | |
6217 | cu->dwo_unit = dwo_unit; | |
685af9cd | 6218 | dwarf2_section_info *section = dwo_unit->section; |
96b79293 TT |
6219 | section->read (objfile); |
6220 | abfd = section->get_bfd_owner (); | |
9c541725 PA |
6221 | begin_info_ptr = info_ptr = (section->buffer |
6222 | + to_underlying (dwo_unit->sect_off)); | |
b0c7bfa9 | 6223 | dwo_abbrev_section = &dwo_unit->dwo_file->sections.abbrev; |
b0c7bfa9 | 6224 | |
4ab09049 | 6225 | if (per_cu->is_debug_types) |
b0c7bfa9 | 6226 | { |
4ab09049 | 6227 | signatured_type *sig_type = (struct signatured_type *) per_cu; |
b0c7bfa9 | 6228 | |
976ca316 SM |
6229 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6230 | section, dwo_abbrev_section, | |
43988095 | 6231 | info_ptr, rcuh_kind::TYPE); |
a2ce51a0 | 6232 | /* This is not an assert because it can be caused by bad debug info. */ |
43988095 | 6233 | if (sig_type->signature != cu->header.signature) |
a2ce51a0 DE |
6234 | { |
6235 | error (_("Dwarf Error: signature mismatch %s vs %s while reading" | |
9d8780f0 | 6236 | " TU at offset %s [in module %s]"), |
a2ce51a0 | 6237 | hex_string (sig_type->signature), |
43988095 | 6238 | hex_string (cu->header.signature), |
9d8780f0 | 6239 | sect_offset_str (dwo_unit->sect_off), |
a2ce51a0 DE |
6240 | bfd_get_filename (abfd)); |
6241 | } | |
9c541725 | 6242 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6243 | /* For DWOs coming from DWP files, we don't know the CU length |
6244 | nor the type's offset in the TU until now. */ | |
4057dfde | 6245 | dwo_unit->length = cu->header.get_length (); |
9c541725 | 6246 | dwo_unit->type_offset_in_tu = cu->header.type_cu_offset_in_tu; |
b0c7bfa9 DE |
6247 | |
6248 | /* Establish the type offset that can be used to lookup the type. | |
6249 | For DWO files, we don't know it until now. */ | |
9c541725 PA |
6250 | sig_type->type_offset_in_section |
6251 | = dwo_unit->sect_off + to_underlying (dwo_unit->type_offset_in_tu); | |
b0c7bfa9 DE |
6252 | } |
6253 | else | |
6254 | { | |
976ca316 SM |
6255 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6256 | section, dwo_abbrev_section, | |
43988095 | 6257 | info_ptr, rcuh_kind::COMPILE); |
9c541725 | 6258 | gdb_assert (dwo_unit->sect_off == cu->header.sect_off); |
b0c7bfa9 DE |
6259 | /* For DWOs coming from DWP files, we don't know the CU length |
6260 | until now. */ | |
4057dfde | 6261 | dwo_unit->length = cu->header.get_length (); |
b0c7bfa9 DE |
6262 | } |
6263 | ||
606decb2 | 6264 | dwo_abbrev_section->read (objfile); |
685af9cd | 6265 | *result_dwo_abbrev_table |
606decb2 | 6266 | = abbrev_table::read (dwo_abbrev_section, cu->header.abbrev_sect_off); |
685af9cd TT |
6267 | init_cu_die_reader (result_reader, cu, section, dwo_unit->dwo_file, |
6268 | result_dwo_abbrev_table->get ()); | |
b0c7bfa9 DE |
6269 | |
6270 | /* Read in the die, but leave space to copy over the attributes | |
6271 | from the stub. This has the benefit of simplifying the rest of | |
6272 | the code - all the work to maintain the illusion of a single | |
6273 | DW_TAG_{compile,type}_unit DIE is done here. */ | |
6274 | num_extra_attrs = ((stmt_list != NULL) | |
6275 | + (low_pc != NULL) | |
6276 | + (high_pc != NULL) | |
6277 | + (ranges != NULL) | |
6278 | + (comp_dir != NULL)); | |
6279 | info_ptr = read_full_die_1 (result_reader, result_comp_unit_die, info_ptr, | |
3e225074 | 6280 | num_extra_attrs); |
b0c7bfa9 DE |
6281 | |
6282 | /* Copy over the attributes from the stub to the DIE we just read in. */ | |
6283 | comp_unit_die = *result_comp_unit_die; | |
6284 | i = comp_unit_die->num_attrs; | |
6285 | if (stmt_list != NULL) | |
6286 | comp_unit_die->attrs[i++] = *stmt_list; | |
6287 | if (low_pc != NULL) | |
6288 | comp_unit_die->attrs[i++] = *low_pc; | |
6289 | if (high_pc != NULL) | |
6290 | comp_unit_die->attrs[i++] = *high_pc; | |
6291 | if (ranges != NULL) | |
6292 | comp_unit_die->attrs[i++] = *ranges; | |
6293 | if (comp_dir != NULL) | |
6294 | comp_unit_die->attrs[i++] = *comp_dir; | |
6295 | comp_unit_die->num_attrs += num_extra_attrs; | |
6296 | ||
b4f54984 | 6297 | if (dwarf_die_debug) |
bf6af496 DE |
6298 | { |
6299 | fprintf_unfiltered (gdb_stdlog, | |
6300 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 6301 | section->get_name (), |
bf6af496 DE |
6302 | (unsigned) (begin_info_ptr - section->buffer), |
6303 | bfd_get_filename (abfd)); | |
b4f54984 | 6304 | dump_die (comp_unit_die, dwarf_die_debug); |
bf6af496 DE |
6305 | } |
6306 | ||
b0c7bfa9 DE |
6307 | /* Skip dummy compilation units. */ |
6308 | if (info_ptr >= begin_info_ptr + dwo_unit->length | |
6309 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
6310 | return 0; | |
6311 | ||
6312 | *result_info_ptr = info_ptr; | |
6313 | return 1; | |
6314 | } | |
6315 | ||
a084a2a6 AT |
6316 | /* Return the signature of the compile unit, if found. In DWARF 4 and before, |
6317 | the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the | |
6318 | signature is part of the header. */ | |
6319 | static gdb::optional<ULONGEST> | |
6320 | lookup_dwo_id (struct dwarf2_cu *cu, struct die_info* comp_unit_die) | |
6321 | { | |
6322 | if (cu->header.version >= 5) | |
6323 | return cu->header.signature; | |
6324 | struct attribute *attr; | |
6325 | attr = dwarf2_attr (comp_unit_die, DW_AT_GNU_dwo_id, cu); | |
529908cb | 6326 | if (attr == nullptr || !attr->form_is_unsigned ()) |
a084a2a6 | 6327 | return gdb::optional<ULONGEST> (); |
529908cb | 6328 | return attr->as_unsigned (); |
a084a2a6 AT |
6329 | } |
6330 | ||
c0ab21c2 | 6331 | /* Subroutine of cutu_reader to simplify it. |
b0c7bfa9 | 6332 | Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU. |
6a506a2d | 6333 | Returns NULL if the specified DWO unit cannot be found. */ |
b0c7bfa9 DE |
6334 | |
6335 | static struct dwo_unit * | |
4ab09049 | 6336 | lookup_dwo_unit (dwarf2_cu *cu, die_info *comp_unit_die, const char *dwo_name) |
b0c7bfa9 | 6337 | { |
4ab09049 | 6338 | dwarf2_per_cu_data *per_cu = cu->per_cu; |
b0c7bfa9 | 6339 | struct dwo_unit *dwo_unit; |
c0ab21c2 | 6340 | const char *comp_dir; |
b0c7bfa9 | 6341 | |
a2ce51a0 DE |
6342 | gdb_assert (cu != NULL); |
6343 | ||
b0c7bfa9 | 6344 | /* Yeah, we look dwo_name up again, but it simplifies the code. */ |
a084a2a6 | 6345 | dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
7d45c7c3 | 6346 | comp_dir = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
b0c7bfa9 | 6347 | |
4ab09049 SM |
6348 | if (per_cu->is_debug_types) |
6349 | dwo_unit = lookup_dwo_type_unit (cu, dwo_name, comp_dir); | |
b0c7bfa9 DE |
6350 | else |
6351 | { | |
a084a2a6 | 6352 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
4ab09049 | 6353 | |
a084a2a6 | 6354 | if (!signature.has_value ()) |
b0c7bfa9 DE |
6355 | error (_("Dwarf Error: missing dwo_id for dwo_name %s" |
6356 | " [in module %s]"), | |
4ab09049 SM |
6357 | dwo_name, bfd_get_filename (per_cu->per_bfd->obfd)); |
6358 | ||
6359 | dwo_unit = lookup_dwo_comp_unit (cu, dwo_name, comp_dir, *signature); | |
b0c7bfa9 DE |
6360 | } |
6361 | ||
b0c7bfa9 DE |
6362 | return dwo_unit; |
6363 | } | |
6364 | ||
c0ab21c2 | 6365 | /* Subroutine of cutu_reader to simplify it. |
6aa5f3a6 | 6366 | See it for a description of the parameters. |
fcd3b13d | 6367 | Read a TU directly from a DWO file, bypassing the stub. */ |
a2ce51a0 | 6368 | |
c0ab21c2 | 6369 | void |
9e021579 SM |
6370 | cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data *this_cu, |
6371 | dwarf2_per_objfile *per_objfile, | |
2e671100 | 6372 | dwarf2_cu *existing_cu) |
a2ce51a0 | 6373 | { |
a2ce51a0 | 6374 | struct signatured_type *sig_type; |
a2ce51a0 DE |
6375 | |
6376 | /* Verify we can do the following downcast, and that we have the | |
6377 | data we need. */ | |
6378 | gdb_assert (this_cu->is_debug_types && this_cu->reading_dwo_directly); | |
6379 | sig_type = (struct signatured_type *) this_cu; | |
6380 | gdb_assert (sig_type->dwo_unit != NULL); | |
6381 | ||
2e671100 SM |
6382 | dwarf2_cu *cu; |
6383 | ||
6384 | if (existing_cu != nullptr) | |
6aa5f3a6 | 6385 | { |
2e671100 SM |
6386 | cu = existing_cu; |
6387 | gdb_assert (cu->dwo_unit == sig_type->dwo_unit); | |
6aa5f3a6 | 6388 | /* There's no need to do the rereading_dwo_cu handling that |
c0ab21c2 | 6389 | cutu_reader does since we don't read the stub. */ |
6aa5f3a6 DE |
6390 | } |
6391 | else | |
6392 | { | |
7188ed02 | 6393 | /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu |
dda83cd7 | 6394 | in per_objfile yet. */ |
7188ed02 | 6395 | gdb_assert (per_objfile->get_cu (this_cu) == nullptr); |
9e021579 | 6396 | m_new_cu.reset (new dwarf2_cu (this_cu, per_objfile)); |
2e671100 | 6397 | cu = m_new_cu.get (); |
6aa5f3a6 DE |
6398 | } |
6399 | ||
6400 | /* A future optimization, if needed, would be to use an existing | |
6401 | abbrev table. When reading DWOs with skeletonless TUs, all the TUs | |
6402 | could share abbrev tables. */ | |
a2ce51a0 | 6403 | |
2e671100 | 6404 | if (read_cutu_die_from_dwo (cu, sig_type->dwo_unit, |
a2ce51a0 DE |
6405 | NULL /* stub_comp_unit_die */, |
6406 | sig_type->dwo_unit->dwo_file->comp_dir, | |
4ebe4877 | 6407 | this, &info_ptr, |
3e225074 | 6408 | &comp_unit_die, |
c0ab21c2 | 6409 | &m_dwo_abbrev_table) == 0) |
a2ce51a0 DE |
6410 | { |
6411 | /* Dummy die. */ | |
c0ab21c2 | 6412 | dummy_p = true; |
a2ce51a0 | 6413 | } |
a2ce51a0 DE |
6414 | } |
6415 | ||
fd820528 | 6416 | /* Initialize a CU (or TU) and read its DIEs. |
3019eac3 | 6417 | If the CU defers to a DWO file, read the DWO file as well. |
dee91e82 | 6418 | |
f4dc4d17 DE |
6419 | ABBREV_TABLE, if non-NULL, is the abbreviation table to use. |
6420 | Otherwise the table specified in the comp unit header is read in and used. | |
6421 | This is an optimization for when we already have the abbrev table. | |
6422 | ||
2e671100 SM |
6423 | If EXISTING_CU is non-NULL, then use it. Otherwise, a new CU is |
6424 | allocated. */ | |
aaa75496 | 6425 | |
ab432490 | 6426 | cutu_reader::cutu_reader (dwarf2_per_cu_data *this_cu, |
976ca316 | 6427 | dwarf2_per_objfile *per_objfile, |
c0ab21c2 | 6428 | struct abbrev_table *abbrev_table, |
2e671100 | 6429 | dwarf2_cu *existing_cu, |
c0ab21c2 TT |
6430 | bool skip_partial) |
6431 | : die_reader_specs {}, | |
6751ebae | 6432 | m_this_cu (this_cu) |
c906108c | 6433 | { |
976ca316 | 6434 | struct objfile *objfile = per_objfile->objfile; |
8a0459fd | 6435 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6436 | bfd *abfd = section->get_bfd_owner (); |
c0ab21c2 | 6437 | const gdb_byte *begin_info_ptr; |
dee91e82 | 6438 | struct signatured_type *sig_type = NULL; |
4bdcc0c1 | 6439 | struct dwarf2_section_info *abbrev_section; |
42e7ad6c DE |
6440 | /* Non-zero if CU currently points to a DWO file and we need to |
6441 | reread it. When this happens we need to reread the skeleton die | |
a2ce51a0 | 6442 | before we can reread the DWO file (this only applies to CUs, not TUs). */ |
42e7ad6c | 6443 | int rereading_dwo_cu = 0; |
c906108c | 6444 | |
b4f54984 | 6445 | if (dwarf_die_debug) |
9d8780f0 | 6446 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6447 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6448 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6449 | |
a2ce51a0 DE |
6450 | /* If we're reading a TU directly from a DWO file, including a virtual DWO |
6451 | file (instead of going through the stub), short-circuit all of this. */ | |
6452 | if (this_cu->reading_dwo_directly) | |
6453 | { | |
6454 | /* Narrow down the scope of possibilities to have to understand. */ | |
6455 | gdb_assert (this_cu->is_debug_types); | |
6456 | gdb_assert (abbrev_table == NULL); | |
976ca316 | 6457 | init_tu_and_read_dwo_dies (this_cu, per_objfile, existing_cu); |
a2ce51a0 DE |
6458 | return; |
6459 | } | |
6460 | ||
dee91e82 | 6461 | /* This is cheap if the section is already read in. */ |
96b79293 | 6462 | section->read (objfile); |
dee91e82 | 6463 | |
9c541725 | 6464 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
36586728 TT |
6465 | |
6466 | abbrev_section = get_abbrev_section_for_cu (this_cu); | |
dee91e82 | 6467 | |
2e671100 SM |
6468 | dwarf2_cu *cu; |
6469 | ||
6470 | if (existing_cu != nullptr) | |
dee91e82 | 6471 | { |
2e671100 | 6472 | cu = existing_cu; |
42e7ad6c DE |
6473 | /* If this CU is from a DWO file we need to start over, we need to |
6474 | refetch the attributes from the skeleton CU. | |
6475 | This could be optimized by retrieving those attributes from when we | |
6476 | were here the first time: the previous comp_unit_die was stored in | |
6477 | comp_unit_obstack. But there's no data yet that we need this | |
6478 | optimization. */ | |
6479 | if (cu->dwo_unit != NULL) | |
6480 | rereading_dwo_cu = 1; | |
dee91e82 DE |
6481 | } |
6482 | else | |
6483 | { | |
7188ed02 | 6484 | /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu |
dda83cd7 | 6485 | in per_objfile yet. */ |
976ca316 SM |
6486 | gdb_assert (per_objfile->get_cu (this_cu) == nullptr); |
6487 | m_new_cu.reset (new dwarf2_cu (this_cu, per_objfile)); | |
c0ab21c2 | 6488 | cu = m_new_cu.get (); |
42e7ad6c | 6489 | } |
dee91e82 | 6490 | |
b0c7bfa9 | 6491 | /* Get the header. */ |
9c541725 | 6492 | if (to_underlying (cu->header.first_die_cu_offset) != 0 && !rereading_dwo_cu) |
42e7ad6c DE |
6493 | { |
6494 | /* We already have the header, there's no need to read it in again. */ | |
9c541725 | 6495 | info_ptr += to_underlying (cu->header.first_die_cu_offset); |
42e7ad6c DE |
6496 | } |
6497 | else | |
6498 | { | |
3019eac3 | 6499 | if (this_cu->is_debug_types) |
dee91e82 | 6500 | { |
976ca316 SM |
6501 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6502 | section, abbrev_section, | |
6503 | info_ptr, rcuh_kind::TYPE); | |
dee91e82 | 6504 | |
42e7ad6c DE |
6505 | /* Since per_cu is the first member of struct signatured_type, |
6506 | we can go from a pointer to one to a pointer to the other. */ | |
6507 | sig_type = (struct signatured_type *) this_cu; | |
43988095 | 6508 | gdb_assert (sig_type->signature == cu->header.signature); |
9c541725 PA |
6509 | gdb_assert (sig_type->type_offset_in_tu |
6510 | == cu->header.type_cu_offset_in_tu); | |
6511 | gdb_assert (this_cu->sect_off == cu->header.sect_off); | |
dee91e82 | 6512 | |
42e7ad6c DE |
6513 | /* LENGTH has not been set yet for type units if we're |
6514 | using .gdb_index. */ | |
4057dfde | 6515 | this_cu->length = cu->header.get_length (); |
3019eac3 DE |
6516 | |
6517 | /* Establish the type offset that can be used to lookup the type. */ | |
9c541725 PA |
6518 | sig_type->type_offset_in_section = |
6519 | this_cu->sect_off + to_underlying (sig_type->type_offset_in_tu); | |
43988095 JK |
6520 | |
6521 | this_cu->dwarf_version = cu->header.version; | |
dee91e82 DE |
6522 | } |
6523 | else | |
6524 | { | |
976ca316 SM |
6525 | info_ptr = read_and_check_comp_unit_head (per_objfile, &cu->header, |
6526 | section, abbrev_section, | |
43988095 JK |
6527 | info_ptr, |
6528 | rcuh_kind::COMPILE); | |
dee91e82 | 6529 | |
9c541725 | 6530 | gdb_assert (this_cu->sect_off == cu->header.sect_off); |
3ee6bb11 TV |
6531 | if (this_cu->length == 0) |
6532 | this_cu->length = cu->header.get_length (); | |
6533 | else | |
6534 | gdb_assert (this_cu->length == cu->header.get_length ()); | |
43988095 | 6535 | this_cu->dwarf_version = cu->header.version; |
dee91e82 DE |
6536 | } |
6537 | } | |
10b3939b | 6538 | |
6caca83c | 6539 | /* Skip dummy compilation units. */ |
dee91e82 | 6540 | if (info_ptr >= begin_info_ptr + this_cu->length |
6caca83c | 6541 | || peek_abbrev_code (abfd, info_ptr) == 0) |
c0ab21c2 TT |
6542 | { |
6543 | dummy_p = true; | |
6544 | return; | |
6545 | } | |
6caca83c | 6546 | |
433df2d4 DE |
6547 | /* If we don't have them yet, read the abbrevs for this compilation unit. |
6548 | And if we need to read them now, make sure they're freed when we're | |
c0ab21c2 | 6549 | done. */ |
f4dc4d17 | 6550 | if (abbrev_table != NULL) |
685af9cd TT |
6551 | gdb_assert (cu->header.abbrev_sect_off == abbrev_table->sect_off); |
6552 | else | |
f4dc4d17 | 6553 | { |
606decb2 | 6554 | abbrev_section->read (objfile); |
c0ab21c2 | 6555 | m_abbrev_table_holder |
606decb2 | 6556 | = abbrev_table::read (abbrev_section, cu->header.abbrev_sect_off); |
c0ab21c2 | 6557 | abbrev_table = m_abbrev_table_holder.get (); |
42e7ad6c | 6558 | } |
af703f96 | 6559 | |
dee91e82 | 6560 | /* Read the top level CU/TU die. */ |
c0ab21c2 | 6561 | init_cu_die_reader (this, cu, section, NULL, abbrev_table); |
3e225074 | 6562 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
93311388 | 6563 | |
58f0c718 | 6564 | if (skip_partial && comp_unit_die->tag == DW_TAG_partial_unit) |
c0ab21c2 TT |
6565 | { |
6566 | dummy_p = true; | |
6567 | return; | |
6568 | } | |
58f0c718 | 6569 | |
b0c7bfa9 | 6570 | /* If we are in a DWO stub, process it and then read in the "real" CU/TU |
685af9cd TT |
6571 | from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation |
6572 | table from the DWO file and pass the ownership over to us. It will be | |
6573 | referenced from READER, so we must make sure to free it after we're done | |
6574 | with READER. | |
6575 | ||
b0c7bfa9 DE |
6576 | Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a |
6577 | DWO CU, that this test will fail (the attribute will not be present). */ | |
a084a2a6 | 6578 | const char *dwo_name = dwarf2_dwo_name (comp_unit_die, cu); |
a084a2a6 | 6579 | if (dwo_name != nullptr) |
3019eac3 | 6580 | { |
3019eac3 | 6581 | struct dwo_unit *dwo_unit; |
b0c7bfa9 | 6582 | struct die_info *dwo_comp_unit_die; |
3019eac3 | 6583 | |
3e225074 | 6584 | if (comp_unit_die->has_children) |
6a506a2d | 6585 | { |
b98664d3 | 6586 | complaint (_("compilation unit with DW_AT_GNU_dwo_name" |
9d8780f0 SM |
6587 | " has children (offset %s) [in module %s]"), |
6588 | sect_offset_str (this_cu->sect_off), | |
6589 | bfd_get_filename (abfd)); | |
6a506a2d | 6590 | } |
4ab09049 | 6591 | dwo_unit = lookup_dwo_unit (cu, comp_unit_die, dwo_name); |
6a506a2d | 6592 | if (dwo_unit != NULL) |
3019eac3 | 6593 | { |
4ab09049 | 6594 | if (read_cutu_die_from_dwo (cu, dwo_unit, |
a2ce51a0 | 6595 | comp_unit_die, NULL, |
c0ab21c2 | 6596 | this, &info_ptr, |
3e225074 | 6597 | &dwo_comp_unit_die, |
c0ab21c2 | 6598 | &m_dwo_abbrev_table) == 0) |
6a506a2d DE |
6599 | { |
6600 | /* Dummy die. */ | |
c0ab21c2 | 6601 | dummy_p = true; |
6a506a2d DE |
6602 | return; |
6603 | } | |
6604 | comp_unit_die = dwo_comp_unit_die; | |
6605 | } | |
6606 | else | |
6607 | { | |
6608 | /* Yikes, we couldn't find the rest of the DIE, we only have | |
6609 | the stub. A complaint has already been logged. There's | |
6610 | not much more we can do except pass on the stub DIE to | |
6611 | die_reader_func. We don't want to throw an error on bad | |
6612 | debug info. */ | |
3019eac3 DE |
6613 | } |
6614 | } | |
c0ab21c2 | 6615 | } |
3019eac3 | 6616 | |
6751ebae TT |
6617 | void |
6618 | cutu_reader::keep () | |
c0ab21c2 | 6619 | { |
b0c7bfa9 | 6620 | /* Done, clean up. */ |
6751ebae TT |
6621 | gdb_assert (!dummy_p); |
6622 | if (m_new_cu != NULL) | |
348e048f | 6623 | { |
7188ed02 | 6624 | /* Save this dwarf2_cu in the per_objfile. The per_objfile owns it |
dda83cd7 | 6625 | now. */ |
7188ed02 SM |
6626 | dwarf2_per_objfile *per_objfile = m_new_cu->per_objfile; |
6627 | per_objfile->set_cu (m_this_cu, m_new_cu.release ()); | |
348e048f | 6628 | } |
dee91e82 DE |
6629 | } |
6630 | ||
18a8505e AT |
6631 | /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name) |
6632 | if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is | |
6633 | assumed to have already done the lookup to find the DWO file). | |
dee91e82 DE |
6634 | |
6635 | The caller is required to fill in THIS_CU->section, THIS_CU->offset, and | |
3019eac3 | 6636 | THIS_CU->is_debug_types, but nothing else. |
dee91e82 DE |
6637 | |
6638 | We fill in THIS_CU->length. | |
6639 | ||
dee91e82 | 6640 | THIS_CU->cu is always freed when done. |
3019eac3 | 6641 | This is done in order to not leave THIS_CU->cu in a state where we have |
18a8505e AT |
6642 | to care whether it refers to the "main" CU or the DWO CU. |
6643 | ||
6644 | When parent_cu is passed, it is used to provide a default value for | |
6645 | str_offsets_base and addr_base from the parent. */ | |
dee91e82 | 6646 | |
ab432490 | 6647 | cutu_reader::cutu_reader (dwarf2_per_cu_data *this_cu, |
976ca316 | 6648 | dwarf2_per_objfile *per_objfile, |
c0ab21c2 TT |
6649 | struct dwarf2_cu *parent_cu, |
6650 | struct dwo_file *dwo_file) | |
6651 | : die_reader_specs {}, | |
6652 | m_this_cu (this_cu) | |
dee91e82 | 6653 | { |
976ca316 | 6654 | struct objfile *objfile = per_objfile->objfile; |
8a0459fd | 6655 | struct dwarf2_section_info *section = this_cu->section; |
96b79293 | 6656 | bfd *abfd = section->get_bfd_owner (); |
33e80786 | 6657 | struct dwarf2_section_info *abbrev_section; |
d521ce57 | 6658 | const gdb_byte *begin_info_ptr, *info_ptr; |
dee91e82 | 6659 | |
b4f54984 | 6660 | if (dwarf_die_debug) |
9d8780f0 | 6661 | fprintf_unfiltered (gdb_stdlog, "Reading %s unit at offset %s\n", |
09406207 | 6662 | this_cu->is_debug_types ? "type" : "comp", |
9d8780f0 | 6663 | sect_offset_str (this_cu->sect_off)); |
09406207 | 6664 | |
976ca316 | 6665 | gdb_assert (per_objfile->get_cu (this_cu) == nullptr); |
dee91e82 | 6666 | |
33e80786 DE |
6667 | abbrev_section = (dwo_file != NULL |
6668 | ? &dwo_file->sections.abbrev | |
6669 | : get_abbrev_section_for_cu (this_cu)); | |
6670 | ||
dee91e82 | 6671 | /* This is cheap if the section is already read in. */ |
96b79293 | 6672 | section->read (objfile); |
dee91e82 | 6673 | |
976ca316 | 6674 | m_new_cu.reset (new dwarf2_cu (this_cu, per_objfile)); |
dee91e82 | 6675 | |
9c541725 | 6676 | begin_info_ptr = info_ptr = section->buffer + to_underlying (this_cu->sect_off); |
976ca316 SM |
6677 | info_ptr = read_and_check_comp_unit_head (per_objfile, &m_new_cu->header, |
6678 | section, abbrev_section, info_ptr, | |
43988095 JK |
6679 | (this_cu->is_debug_types |
6680 | ? rcuh_kind::TYPE | |
6681 | : rcuh_kind::COMPILE)); | |
dee91e82 | 6682 | |
18a8505e AT |
6683 | if (parent_cu != nullptr) |
6684 | { | |
c0ab21c2 TT |
6685 | m_new_cu->str_offsets_base = parent_cu->str_offsets_base; |
6686 | m_new_cu->addr_base = parent_cu->addr_base; | |
18a8505e | 6687 | } |
4057dfde | 6688 | this_cu->length = m_new_cu->header.get_length (); |
dee91e82 DE |
6689 | |
6690 | /* Skip dummy compilation units. */ | |
6691 | if (info_ptr >= begin_info_ptr + this_cu->length | |
6692 | || peek_abbrev_code (abfd, info_ptr) == 0) | |
c0ab21c2 TT |
6693 | { |
6694 | dummy_p = true; | |
6695 | return; | |
6696 | } | |
72bf9492 | 6697 | |
606decb2 | 6698 | abbrev_section->read (objfile); |
c0ab21c2 | 6699 | m_abbrev_table_holder |
606decb2 | 6700 | = abbrev_table::read (abbrev_section, m_new_cu->header.abbrev_sect_off); |
dee91e82 | 6701 | |
c0ab21c2 TT |
6702 | init_cu_die_reader (this, m_new_cu.get (), section, dwo_file, |
6703 | m_abbrev_table_holder.get ()); | |
3e225074 | 6704 | info_ptr = read_full_die (this, &comp_unit_die, info_ptr); |
dee91e82 DE |
6705 | } |
6706 | ||
0018ea6f DE |
6707 | \f |
6708 | /* Type Unit Groups. | |
dee91e82 | 6709 | |
0018ea6f DE |
6710 | Type Unit Groups are a way to collapse the set of all TUs (type units) into |
6711 | a more manageable set. The grouping is done by DW_AT_stmt_list entry | |
6712 | so that all types coming from the same compilation (.o file) are grouped | |
6713 | together. A future step could be to put the types in the same symtab as | |
6714 | the CU the types ultimately came from. */ | |
ff013f42 | 6715 | |
f4dc4d17 DE |
6716 | static hashval_t |
6717 | hash_type_unit_group (const void *item) | |
6718 | { | |
9a3c8263 SM |
6719 | const struct type_unit_group *tu_group |
6720 | = (const struct type_unit_group *) item; | |
f4dc4d17 | 6721 | |
094b34ac | 6722 | return hash_stmt_list_entry (&tu_group->hash); |
f4dc4d17 | 6723 | } |
348e048f DE |
6724 | |
6725 | static int | |
f4dc4d17 | 6726 | eq_type_unit_group (const void *item_lhs, const void *item_rhs) |
348e048f | 6727 | { |
9a3c8263 SM |
6728 | const struct type_unit_group *lhs = (const struct type_unit_group *) item_lhs; |
6729 | const struct type_unit_group *rhs = (const struct type_unit_group *) item_rhs; | |
348e048f | 6730 | |
094b34ac | 6731 | return eq_stmt_list_entry (&lhs->hash, &rhs->hash); |
f4dc4d17 | 6732 | } |
348e048f | 6733 | |
f4dc4d17 DE |
6734 | /* Allocate a hash table for type unit groups. */ |
6735 | ||
eaa5fa8b | 6736 | static htab_up |
298e9637 | 6737 | allocate_type_unit_groups_table () |
f4dc4d17 | 6738 | { |
eaa5fa8b TT |
6739 | return htab_up (htab_create_alloc (3, |
6740 | hash_type_unit_group, | |
6741 | eq_type_unit_group, | |
0d305d5c TT |
6742 | [] (void *arg) |
6743 | { | |
6744 | type_unit_group *grp | |
6745 | = (type_unit_group *) arg; | |
6746 | delete grp; | |
6747 | }, | |
6748 | xcalloc, xfree)); | |
f4dc4d17 | 6749 | } |
dee91e82 | 6750 | |
f4dc4d17 DE |
6751 | /* Type units that don't have DW_AT_stmt_list are grouped into their own |
6752 | partial symtabs. We combine several TUs per psymtab to not let the size | |
6753 | of any one psymtab grow too big. */ | |
6754 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31) | |
6755 | #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10 | |
dee91e82 | 6756 | |
094b34ac | 6757 | /* Helper routine for get_type_unit_group. |
f4dc4d17 DE |
6758 | Create the type_unit_group object used to hold one or more TUs. */ |
6759 | ||
0d305d5c | 6760 | static std::unique_ptr<type_unit_group> |
094b34ac | 6761 | create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct) |
f4dc4d17 | 6762 | { |
976ca316 SM |
6763 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
6764 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
f4dc4d17 | 6765 | |
0d305d5c TT |
6766 | std::unique_ptr<type_unit_group> tu_group (new type_unit_group); |
6767 | tu_group->per_bfd = per_bfd; | |
f4dc4d17 | 6768 | |
1859c670 | 6769 | if (per_bfd->using_index) |
094b34ac | 6770 | { |
0d305d5c TT |
6771 | tu_group->v.quick = OBSTACK_ZALLOC (&per_bfd->obstack, |
6772 | struct dwarf2_per_cu_quick_data); | |
094b34ac DE |
6773 | } |
6774 | else | |
6775 | { | |
9c541725 | 6776 | unsigned int line_offset = to_underlying (line_offset_struct); |
891813be | 6777 | dwarf2_psymtab *pst; |
528e1572 | 6778 | std::string name; |
094b34ac DE |
6779 | |
6780 | /* Give the symtab a useful name for debug purposes. */ | |
6781 | if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0) | |
528e1572 SM |
6782 | name = string_printf ("<type_units_%d>", |
6783 | (line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB)); | |
094b34ac | 6784 | else |
528e1572 | 6785 | name = string_printf ("<type_units_at_0x%x>", line_offset); |
094b34ac | 6786 | |
0d305d5c TT |
6787 | pst = create_partial_symtab (tu_group.get (), per_objfile, |
6788 | name.c_str ()); | |
6d94535f | 6789 | pst->anonymous = true; |
094b34ac | 6790 | } |
f4dc4d17 | 6791 | |
094b34ac | 6792 | tu_group->hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6793 | tu_group->hash.line_sect_off = line_offset_struct; |
f4dc4d17 DE |
6794 | |
6795 | return tu_group; | |
6796 | } | |
6797 | ||
094b34ac DE |
6798 | /* Look up the type_unit_group for type unit CU, and create it if necessary. |
6799 | STMT_LIST is a DW_AT_stmt_list attribute. */ | |
f4dc4d17 DE |
6800 | |
6801 | static struct type_unit_group * | |
ff39bb5e | 6802 | get_type_unit_group (struct dwarf2_cu *cu, const struct attribute *stmt_list) |
f4dc4d17 | 6803 | { |
976ca316 SM |
6804 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
6805 | struct tu_stats *tu_stats = &per_objfile->per_bfd->tu_stats; | |
f4dc4d17 DE |
6806 | struct type_unit_group *tu_group; |
6807 | void **slot; | |
6808 | unsigned int line_offset; | |
6809 | struct type_unit_group type_unit_group_for_lookup; | |
6810 | ||
976ca316 SM |
6811 | if (per_objfile->per_bfd->type_unit_groups == NULL) |
6812 | per_objfile->per_bfd->type_unit_groups = allocate_type_unit_groups_table (); | |
f4dc4d17 DE |
6813 | |
6814 | /* Do we need to create a new group, or can we use an existing one? */ | |
6815 | ||
529908cb | 6816 | if (stmt_list != nullptr && stmt_list->form_is_unsigned ()) |
f4dc4d17 | 6817 | { |
529908cb | 6818 | line_offset = stmt_list->as_unsigned (); |
f4dc4d17 DE |
6819 | ++tu_stats->nr_symtab_sharers; |
6820 | } | |
6821 | else | |
6822 | { | |
6823 | /* Ugh, no stmt_list. Rare, but we have to handle it. | |
6824 | We can do various things here like create one group per TU or | |
6825 | spread them over multiple groups to split up the expansion work. | |
6826 | To avoid worst case scenarios (too many groups or too large groups) | |
6827 | we, umm, group them in bunches. */ | |
6828 | line_offset = (NO_STMT_LIST_TYPE_UNIT_PSYMTAB | |
6829 | | (tu_stats->nr_stmt_less_type_units | |
6830 | / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE)); | |
6831 | ++tu_stats->nr_stmt_less_type_units; | |
6832 | } | |
6833 | ||
094b34ac | 6834 | type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit; |
9c541725 | 6835 | type_unit_group_for_lookup.hash.line_sect_off = (sect_offset) line_offset; |
976ca316 | 6836 | slot = htab_find_slot (per_objfile->per_bfd->type_unit_groups.get (), |
f4dc4d17 | 6837 | &type_unit_group_for_lookup, INSERT); |
0d305d5c | 6838 | if (*slot == nullptr) |
f4dc4d17 | 6839 | { |
9c541725 | 6840 | sect_offset line_offset_struct = (sect_offset) line_offset; |
0d305d5c TT |
6841 | std::unique_ptr<type_unit_group> grp |
6842 | = create_type_unit_group (cu, line_offset_struct); | |
6843 | *slot = grp.release (); | |
f4dc4d17 DE |
6844 | ++tu_stats->nr_symtabs; |
6845 | } | |
6846 | ||
0d305d5c TT |
6847 | tu_group = (struct type_unit_group *) *slot; |
6848 | gdb_assert (tu_group != nullptr); | |
f4dc4d17 DE |
6849 | return tu_group; |
6850 | } | |
0018ea6f DE |
6851 | \f |
6852 | /* Partial symbol tables. */ | |
6853 | ||
6854 | /* Create a psymtab named NAME and assign it to PER_CU. | |
6855 | ||
6856 | The caller must fill in the following details: | |
6857 | dirname, textlow, texthigh. */ | |
6858 | ||
891813be | 6859 | static dwarf2_psymtab * |
7aa104c4 SM |
6860 | create_partial_symtab (dwarf2_per_cu_data *per_cu, |
6861 | dwarf2_per_objfile *per_objfile, | |
6862 | const char *name) | |
0018ea6f | 6863 | { |
0072c873 SM |
6864 | dwarf2_psymtab *pst |
6865 | = new dwarf2_psymtab (name, per_objfile->per_bfd->partial_symtabs.get (), | |
6866 | per_objfile->objfile->per_bfd, per_cu); | |
0018ea6f | 6867 | |
6d94535f | 6868 | pst->psymtabs_addrmap_supported = true; |
0018ea6f DE |
6869 | |
6870 | /* This is the glue that links PST into GDB's symbol API. */ | |
0018ea6f DE |
6871 | per_cu->v.psymtab = pst; |
6872 | ||
6873 | return pst; | |
6874 | } | |
6875 | ||
c0ab21c2 | 6876 | /* DIE reader function for process_psymtab_comp_unit. */ |
0018ea6f DE |
6877 | |
6878 | static void | |
6879 | process_psymtab_comp_unit_reader (const struct die_reader_specs *reader, | |
d521ce57 | 6880 | const gdb_byte *info_ptr, |
0018ea6f | 6881 | struct die_info *comp_unit_die, |
c0ab21c2 | 6882 | enum language pretend_language) |
0018ea6f DE |
6883 | { |
6884 | struct dwarf2_cu *cu = reader->cu; | |
7aa104c4 | 6885 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
84685904 | 6886 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
7aa104c4 | 6887 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 6888 | struct gdbarch *gdbarch = objfile->arch (); |
0018ea6f | 6889 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; |
0018ea6f DE |
6890 | CORE_ADDR baseaddr; |
6891 | CORE_ADDR best_lowpc = 0, best_highpc = 0; | |
891813be | 6892 | dwarf2_psymtab *pst; |
3a2b436a | 6893 | enum pc_bounds_kind cu_bounds_kind; |
0018ea6f | 6894 | const char *filename; |
0018ea6f | 6895 | |
0018ea6f DE |
6896 | gdb_assert (! per_cu->is_debug_types); |
6897 | ||
c0ab21c2 | 6898 | prepare_one_comp_unit (cu, comp_unit_die, pretend_language); |
0018ea6f | 6899 | |
0018ea6f | 6900 | /* Allocate a new partial symbol table structure. */ |
2e927613 TV |
6901 | gdb::unique_xmalloc_ptr<char> debug_filename; |
6902 | static const char artificial[] = "<artificial>"; | |
7d45c7c3 KB |
6903 | filename = dwarf2_string_attr (comp_unit_die, DW_AT_name, cu); |
6904 | if (filename == NULL) | |
0018ea6f | 6905 | filename = ""; |
2e927613 TV |
6906 | else if (strcmp (filename, artificial) == 0) |
6907 | { | |
6908 | debug_filename.reset (concat (artificial, "@", | |
85f0dd3c TV |
6909 | sect_offset_str (per_cu->sect_off), |
6910 | (char *) NULL)); | |
2e927613 TV |
6911 | filename = debug_filename.get (); |
6912 | } | |
0018ea6f | 6913 | |
7aa104c4 | 6914 | pst = create_partial_symtab (per_cu, per_objfile, filename); |
0018ea6f DE |
6915 | |
6916 | /* This must be done before calling dwarf2_build_include_psymtabs. */ | |
7d45c7c3 | 6917 | pst->dirname = dwarf2_string_attr (comp_unit_die, DW_AT_comp_dir, cu); |
0018ea6f | 6918 | |
b3b3bada | 6919 | baseaddr = objfile->text_section_offset (); |
0018ea6f DE |
6920 | |
6921 | dwarf2_find_base_address (comp_unit_die, cu); | |
6922 | ||
6923 | /* Possibly set the default values of LOWPC and HIGHPC from | |
6924 | `DW_AT_ranges'. */ | |
3a2b436a JK |
6925 | cu_bounds_kind = dwarf2_get_pc_bounds (comp_unit_die, &best_lowpc, |
6926 | &best_highpc, cu, pst); | |
6927 | if (cu_bounds_kind == PC_BOUNDS_HIGH_LOW && best_lowpc < best_highpc) | |
79748972 TT |
6928 | { |
6929 | CORE_ADDR low | |
6930 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_lowpc + baseaddr) | |
6931 | - baseaddr); | |
6932 | CORE_ADDR high | |
6933 | = (gdbarch_adjust_dwarf2_addr (gdbarch, best_highpc + baseaddr) | |
6934 | - baseaddr - 1); | |
6935 | /* Store the contiguous range if it is not empty; it can be | |
6936 | empty for CUs with no code. */ | |
84685904 | 6937 | addrmap_set_empty (per_bfd->partial_symtabs->psymtabs_addrmap, |
d320c2b5 | 6938 | low, high, pst); |
79748972 | 6939 | } |
0018ea6f DE |
6940 | |
6941 | /* Check if comp unit has_children. | |
6942 | If so, read the rest of the partial symbols from this comp unit. | |
6943 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 6944 | if (comp_unit_die->has_children) |
0018ea6f DE |
6945 | { |
6946 | struct partial_die_info *first_die; | |
6947 | CORE_ADDR lowpc, highpc; | |
6948 | ||
6949 | lowpc = ((CORE_ADDR) -1); | |
6950 | highpc = ((CORE_ADDR) 0); | |
6951 | ||
6952 | first_die = load_partial_dies (reader, info_ptr, 1); | |
6953 | ||
6954 | scan_partial_symbols (first_die, &lowpc, &highpc, | |
e385593e | 6955 | cu_bounds_kind <= PC_BOUNDS_INVALID, cu); |
0018ea6f DE |
6956 | |
6957 | /* If we didn't find a lowpc, set it to highpc to avoid | |
6958 | complaints from `maint check'. */ | |
6959 | if (lowpc == ((CORE_ADDR) -1)) | |
6960 | lowpc = highpc; | |
6961 | ||
6962 | /* If the compilation unit didn't have an explicit address range, | |
6963 | then use the information extracted from its child dies. */ | |
e385593e | 6964 | if (cu_bounds_kind <= PC_BOUNDS_INVALID) |
0018ea6f DE |
6965 | { |
6966 | best_lowpc = lowpc; | |
6967 | best_highpc = highpc; | |
6968 | } | |
6969 | } | |
4ae976d1 | 6970 | pst->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
6971 | best_lowpc + baseaddr) |
6972 | - baseaddr); | |
4ae976d1 | 6973 | pst->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch, |
79748972 TT |
6974 | best_highpc + baseaddr) |
6975 | - baseaddr); | |
0018ea6f | 6976 | |
ae7754b2 | 6977 | pst->end (); |
0018ea6f | 6978 | |
ae640021 | 6979 | if (!cu->per_cu->imported_symtabs_empty ()) |
0018ea6f DE |
6980 | { |
6981 | int i; | |
ae640021 | 6982 | int len = cu->per_cu->imported_symtabs_size (); |
0018ea6f DE |
6983 | |
6984 | /* Fill in 'dependencies' here; we fill in 'users' in a | |
6985 | post-pass. */ | |
6986 | pst->number_of_dependencies = len; | |
a9342b62 | 6987 | pst->dependencies |
84685904 | 6988 | = per_bfd->partial_symtabs->allocate_dependencies (len); |
ae640021 AB |
6989 | for (i = 0; i < len; ++i) |
6990 | { | |
6991 | pst->dependencies[i] | |
6992 | = cu->per_cu->imported_symtabs->at (i)->v.psymtab; | |
6993 | } | |
0018ea6f | 6994 | |
ae640021 | 6995 | cu->per_cu->imported_symtabs_free (); |
0018ea6f DE |
6996 | } |
6997 | ||
6998 | /* Get the list of files included in the current compilation unit, | |
6999 | and build a psymtab for each of them. */ | |
7000 | dwarf2_build_include_psymtabs (cu, comp_unit_die, pst); | |
7001 | ||
6f738b01 SM |
7002 | dwarf_read_debug_printf ("Psymtab for %s unit @%s: %s - %s" |
7003 | ", %d global, %d static syms", | |
7004 | per_cu->is_debug_types ? "type" : "comp", | |
7005 | sect_offset_str (per_cu->sect_off), | |
7006 | paddress (gdbarch, pst->text_low (objfile)), | |
7007 | paddress (gdbarch, pst->text_high (objfile)), | |
7008 | (int) pst->global_psymbols.size (), | |
7009 | (int) pst->static_psymbols.size ()); | |
0018ea6f DE |
7010 | } |
7011 | ||
7012 | /* Subroutine of dwarf2_build_psymtabs_hard to simplify it. | |
7013 | Process compilation unit THIS_CU for a psymtab. */ | |
7014 | ||
7015 | static void | |
ab432490 SM |
7016 | process_psymtab_comp_unit (dwarf2_per_cu_data *this_cu, |
7017 | dwarf2_per_objfile *per_objfile, | |
135f5437 | 7018 | bool want_partial_unit, |
b93601f3 | 7019 | enum language pretend_language) |
0018ea6f DE |
7020 | { |
7021 | /* If this compilation unit was already read in, free the | |
7022 | cached copy in order to read it in again. This is | |
7023 | necessary because we skipped some symbols when we first | |
7024 | read in the compilation unit (see load_partial_dies). | |
7025 | This problem could be avoided, but the benefit is unclear. */ | |
7188ed02 | 7026 | per_objfile->remove_cu (this_cu); |
0018ea6f | 7027 | |
2e671100 | 7028 | cutu_reader reader (this_cu, per_objfile, nullptr, nullptr, false); |
c0ab21c2 | 7029 | |
58990295 TV |
7030 | switch (reader.comp_unit_die->tag) |
7031 | { | |
7032 | case DW_TAG_compile_unit: | |
7033 | this_cu->unit_type = DW_UT_compile; | |
7034 | break; | |
7035 | case DW_TAG_partial_unit: | |
7036 | this_cu->unit_type = DW_UT_partial; | |
7037 | break; | |
e77b0004 TV |
7038 | case DW_TAG_type_unit: |
7039 | this_cu->unit_type = DW_UT_type; | |
7040 | break; | |
58990295 | 7041 | default: |
702cf3f5 AB |
7042 | error (_("Dwarf Error: unexpected tag '%s' at offset %s [in module %s]"), |
7043 | dwarf_tag_name (reader.comp_unit_die->tag), | |
7044 | sect_offset_str (reader.cu->per_cu->sect_off), | |
7045 | objfile_name (per_objfile->objfile)); | |
58990295 TV |
7046 | } |
7047 | ||
c0ab21c2 | 7048 | if (reader.dummy_p) |
f1902523 | 7049 | { |
c0ab21c2 | 7050 | /* Nothing. */ |
f1902523 | 7051 | } |
c0ab21c2 | 7052 | else if (this_cu->is_debug_types) |
3e225074 TT |
7053 | build_type_psymtabs_reader (&reader, reader.info_ptr, |
7054 | reader.comp_unit_die); | |
135f5437 TT |
7055 | else if (want_partial_unit |
7056 | || reader.comp_unit_die->tag != DW_TAG_partial_unit) | |
c0ab21c2 TT |
7057 | process_psymtab_comp_unit_reader (&reader, reader.info_ptr, |
7058 | reader.comp_unit_die, | |
c0ab21c2 | 7059 | pretend_language); |
0018ea6f | 7060 | |
7188ed02 | 7061 | this_cu->lang = reader.cu->language; |
58990295 | 7062 | |
0018ea6f | 7063 | /* Age out any secondary CUs. */ |
7188ed02 | 7064 | per_objfile->age_comp_units (); |
0018ea6f | 7065 | } |
f4dc4d17 DE |
7066 | |
7067 | /* Reader function for build_type_psymtabs. */ | |
7068 | ||
7069 | static void | |
7070 | build_type_psymtabs_reader (const struct die_reader_specs *reader, | |
d521ce57 | 7071 | const gdb_byte *info_ptr, |
3e225074 | 7072 | struct die_info *type_unit_die) |
f4dc4d17 | 7073 | { |
976ca316 | 7074 | dwarf2_per_objfile *per_objfile = reader->cu->per_objfile; |
f4dc4d17 DE |
7075 | struct dwarf2_cu *cu = reader->cu; |
7076 | struct dwarf2_per_cu_data *per_cu = cu->per_cu; | |
0186c6a7 | 7077 | struct signatured_type *sig_type; |
f4dc4d17 DE |
7078 | struct type_unit_group *tu_group; |
7079 | struct attribute *attr; | |
7080 | struct partial_die_info *first_die; | |
7081 | CORE_ADDR lowpc, highpc; | |
891813be | 7082 | dwarf2_psymtab *pst; |
f4dc4d17 | 7083 | |
0186c6a7 DE |
7084 | gdb_assert (per_cu->is_debug_types); |
7085 | sig_type = (struct signatured_type *) per_cu; | |
f4dc4d17 | 7086 | |
3e225074 | 7087 | if (! type_unit_die->has_children) |
f4dc4d17 DE |
7088 | return; |
7089 | ||
052c8bb8 | 7090 | attr = type_unit_die->attr (DW_AT_stmt_list); |
094b34ac | 7091 | tu_group = get_type_unit_group (cu, attr); |
f4dc4d17 | 7092 | |
df07e2c7 | 7093 | if (tu_group->tus == nullptr) |
a8b3b8e9 | 7094 | tu_group->tus = new std::vector<signatured_type *>; |
df07e2c7 | 7095 | tu_group->tus->push_back (sig_type); |
f4dc4d17 DE |
7096 | |
7097 | prepare_one_comp_unit (cu, type_unit_die, language_minimal); | |
976ca316 | 7098 | pst = create_partial_symtab (per_cu, per_objfile, ""); |
6d94535f | 7099 | pst->anonymous = true; |
f4dc4d17 DE |
7100 | |
7101 | first_die = load_partial_dies (reader, info_ptr, 1); | |
7102 | ||
7103 | lowpc = (CORE_ADDR) -1; | |
7104 | highpc = (CORE_ADDR) 0; | |
7105 | scan_partial_symbols (first_die, &lowpc, &highpc, 0, cu); | |
7106 | ||
ae7754b2 | 7107 | pst->end (); |
f4dc4d17 DE |
7108 | } |
7109 | ||
73051182 DE |
7110 | /* Struct used to sort TUs by their abbreviation table offset. */ |
7111 | ||
7112 | struct tu_abbrev_offset | |
7113 | { | |
b2bdb8cf SM |
7114 | tu_abbrev_offset (signatured_type *sig_type_, sect_offset abbrev_offset_) |
7115 | : sig_type (sig_type_), abbrev_offset (abbrev_offset_) | |
7116 | {} | |
7117 | ||
16e0020b | 7118 | /* This is used when sorting. */ |
5433e20e | 7119 | bool operator< (const tu_abbrev_offset &other) const |
16e0020b TT |
7120 | { |
7121 | return abbrev_offset < other.abbrev_offset; | |
7122 | } | |
7123 | ||
b2bdb8cf | 7124 | signatured_type *sig_type; |
73051182 DE |
7125 | sect_offset abbrev_offset; |
7126 | }; | |
7127 | ||
73051182 | 7128 | /* Efficiently read all the type units. |
73051182 DE |
7129 | |
7130 | The efficiency is because we sort TUs by the abbrev table they use and | |
7131 | only read each abbrev table once. In one program there are 200K TUs | |
7132 | sharing 8K abbrev tables. | |
7133 | ||
7134 | The main purpose of this function is to support building the | |
5989a64e | 7135 | dwarf2_per_objfile->per_bfd->type_unit_groups table. |
73051182 DE |
7136 | TUs typically share the DW_AT_stmt_list of the CU they came from, so we |
7137 | can collapse the search space by grouping them by stmt_list. | |
7138 | The savings can be significant, in the same program from above the 200K TUs | |
7139 | share 8K stmt_list tables. | |
7140 | ||
7141 | FUNC is expected to call get_type_unit_group, which will create the | |
7142 | struct type_unit_group if necessary and add it to | |
5989a64e | 7143 | dwarf2_per_objfile->per_bfd->type_unit_groups. */ |
73051182 DE |
7144 | |
7145 | static void | |
b8efb248 | 7146 | build_type_psymtabs (dwarf2_per_objfile *per_objfile) |
73051182 | 7147 | { |
976ca316 | 7148 | struct tu_stats *tu_stats = &per_objfile->per_bfd->tu_stats; |
685af9cd | 7149 | abbrev_table_up abbrev_table; |
73051182 | 7150 | sect_offset abbrev_offset; |
73051182 DE |
7151 | |
7152 | /* It's up to the caller to not call us multiple times. */ | |
976ca316 | 7153 | gdb_assert (per_objfile->per_bfd->type_unit_groups == NULL); |
73051182 | 7154 | |
91eea9cc | 7155 | if (per_objfile->per_bfd->tu_stats.nr_tus == 0) |
73051182 DE |
7156 | return; |
7157 | ||
7158 | /* TUs typically share abbrev tables, and there can be way more TUs than | |
7159 | abbrev tables. Sort by abbrev table to reduce the number of times we | |
7160 | read each abbrev table in. | |
7161 | Alternatives are to punt or to maintain a cache of abbrev tables. | |
7162 | This is simpler and efficient enough for now. | |
7163 | ||
7164 | Later we group TUs by their DW_AT_stmt_list value (as this defines the | |
7165 | symtab to use). Typically TUs with the same abbrev offset have the same | |
7166 | stmt_list value too so in practice this should work well. | |
7167 | ||
7168 | The basic algorithm here is: | |
7169 | ||
7170 | sort TUs by abbrev table | |
7171 | for each TU with same abbrev table: | |
7172 | read abbrev table if first user | |
7173 | read TU top level DIE | |
7174 | [IWBN if DWO skeletons had DW_AT_stmt_list] | |
7175 | call FUNC */ | |
7176 | ||
6f738b01 | 7177 | dwarf_read_debug_printf ("Building type unit groups ..."); |
73051182 | 7178 | |
91eea9cc | 7179 | /* Sort in a separate table to maintain the order of all_comp_units |
73051182 | 7180 | for .gdb_index: TU indices directly index all_type_units. */ |
b2bdb8cf | 7181 | std::vector<tu_abbrev_offset> sorted_by_abbrev; |
91eea9cc | 7182 | sorted_by_abbrev.reserve (per_objfile->per_bfd->tu_stats.nr_tus); |
b2bdb8cf | 7183 | |
91eea9cc TT |
7184 | for (const auto &cu : per_objfile->per_bfd->all_comp_units) |
7185 | { | |
7186 | if (cu->is_debug_types) | |
7187 | { | |
7188 | auto sig_type = static_cast<signatured_type *> (cu.get ()); | |
7189 | sorted_by_abbrev.emplace_back | |
7190 | (sig_type, read_abbrev_offset (per_objfile, sig_type->section, | |
7191 | sig_type->sect_off)); | |
7192 | } | |
7193 | } | |
73051182 | 7194 | |
16e0020b | 7195 | std::sort (sorted_by_abbrev.begin (), sorted_by_abbrev.end ()); |
73051182 | 7196 | |
9c541725 | 7197 | abbrev_offset = (sect_offset) ~(unsigned) 0; |
73051182 | 7198 | |
b2bdb8cf | 7199 | for (const tu_abbrev_offset &tu : sorted_by_abbrev) |
73051182 | 7200 | { |
73051182 DE |
7201 | /* Switch to the next abbrev table if necessary. */ |
7202 | if (abbrev_table == NULL | |
b2bdb8cf | 7203 | || tu.abbrev_offset != abbrev_offset) |
73051182 | 7204 | { |
b2bdb8cf | 7205 | abbrev_offset = tu.abbrev_offset; |
606decb2 | 7206 | per_objfile->per_bfd->abbrev.read (per_objfile->objfile); |
73051182 | 7207 | abbrev_table = |
606decb2 | 7208 | abbrev_table::read (&per_objfile->per_bfd->abbrev, abbrev_offset); |
73051182 DE |
7209 | ++tu_stats->nr_uniq_abbrev_tables; |
7210 | } | |
7211 | ||
0d305d5c | 7212 | cutu_reader reader (tu.sig_type, per_objfile, |
2e671100 | 7213 | abbrev_table.get (), nullptr, false); |
c0ab21c2 TT |
7214 | if (!reader.dummy_p) |
7215 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7216 | reader.comp_unit_die); |
73051182 | 7217 | } |
6aa5f3a6 | 7218 | } |
73051182 | 7219 | |
6aa5f3a6 DE |
7220 | /* Print collected type unit statistics. */ |
7221 | ||
7222 | static void | |
976ca316 | 7223 | print_tu_stats (dwarf2_per_objfile *per_objfile) |
6aa5f3a6 | 7224 | { |
976ca316 | 7225 | struct tu_stats *tu_stats = &per_objfile->per_bfd->tu_stats; |
6aa5f3a6 | 7226 | |
6f738b01 | 7227 | dwarf_read_debug_printf ("Type unit statistics:"); |
91eea9cc | 7228 | dwarf_read_debug_printf (" %d TUs", tu_stats->nr_tus); |
6f738b01 SM |
7229 | dwarf_read_debug_printf (" %d uniq abbrev tables", |
7230 | tu_stats->nr_uniq_abbrev_tables); | |
7231 | dwarf_read_debug_printf (" %d symtabs from stmt_list entries", | |
7232 | tu_stats->nr_symtabs); | |
7233 | dwarf_read_debug_printf (" %d symtab sharers", | |
7234 | tu_stats->nr_symtab_sharers); | |
7235 | dwarf_read_debug_printf (" %d type units without a stmt_list", | |
7236 | tu_stats->nr_stmt_less_type_units); | |
7237 | dwarf_read_debug_printf (" %d all_type_units reallocs", | |
7238 | tu_stats->nr_all_type_units_reallocs); | |
73051182 DE |
7239 | } |
7240 | ||
f4dc4d17 DE |
7241 | /* Traversal function for build_type_psymtabs. */ |
7242 | ||
7243 | static int | |
7244 | build_type_psymtab_dependencies (void **slot, void *info) | |
7245 | { | |
976ca316 | 7246 | dwarf2_per_objfile *per_objfile = (dwarf2_per_objfile *) info; |
84685904 | 7247 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
f4dc4d17 | 7248 | struct type_unit_group *tu_group = (struct type_unit_group *) *slot; |
0d305d5c | 7249 | dwarf2_psymtab *pst = tu_group->v.psymtab; |
df07e2c7 | 7250 | int len = (tu_group->tus == nullptr) ? 0 : tu_group->tus->size (); |
f4dc4d17 DE |
7251 | int i; |
7252 | ||
7253 | gdb_assert (len > 0); | |
0d305d5c | 7254 | gdb_assert (tu_group->type_unit_group_p ()); |
f4dc4d17 DE |
7255 | |
7256 | pst->number_of_dependencies = len; | |
84685904 | 7257 | pst->dependencies = per_bfd->partial_symtabs->allocate_dependencies (len); |
df07e2c7 | 7258 | for (i = 0; i < len; ++i) |
f4dc4d17 | 7259 | { |
df07e2c7 | 7260 | struct signatured_type *iter = tu_group->tus->at (i); |
0d305d5c TT |
7261 | gdb_assert (iter->is_debug_types); |
7262 | pst->dependencies[i] = iter->v.psymtab; | |
796a7ff8 | 7263 | iter->type_unit_group = tu_group; |
f4dc4d17 DE |
7264 | } |
7265 | ||
df07e2c7 AB |
7266 | delete tu_group->tus; |
7267 | tu_group->tus = nullptr; | |
348e048f DE |
7268 | |
7269 | return 1; | |
7270 | } | |
7271 | ||
6aa5f3a6 DE |
7272 | /* Traversal function for process_skeletonless_type_unit. |
7273 | Read a TU in a DWO file and build partial symbols for it. */ | |
7274 | ||
7275 | static int | |
7276 | process_skeletonless_type_unit (void **slot, void *info) | |
7277 | { | |
7278 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
976ca316 | 7279 | dwarf2_per_objfile *per_objfile = (dwarf2_per_objfile *) info; |
6aa5f3a6 DE |
7280 | struct signatured_type find_entry, *entry; |
7281 | ||
7282 | /* If this TU doesn't exist in the global table, add it and read it in. */ | |
7283 | ||
976ca316 SM |
7284 | if (per_objfile->per_bfd->signatured_types == NULL) |
7285 | per_objfile->per_bfd->signatured_types = allocate_signatured_type_table (); | |
6aa5f3a6 DE |
7286 | |
7287 | find_entry.signature = dwo_unit->signature; | |
976ca316 | 7288 | slot = htab_find_slot (per_objfile->per_bfd->signatured_types.get (), |
b0b6a987 | 7289 | &find_entry, INSERT); |
6aa5f3a6 DE |
7290 | /* If we've already seen this type there's nothing to do. What's happening |
7291 | is we're doing our own version of comdat-folding here. */ | |
7292 | if (*slot != NULL) | |
7293 | return 1; | |
7294 | ||
b8efb248 | 7295 | /* This does the job that create_all_comp_units would have done for |
6aa5f3a6 | 7296 | this TU. */ |
976ca316 SM |
7297 | entry = add_type_unit (per_objfile, dwo_unit->signature, slot); |
7298 | fill_in_sig_entry_from_dwo_entry (per_objfile, entry, dwo_unit); | |
6aa5f3a6 DE |
7299 | *slot = entry; |
7300 | ||
b8efb248 | 7301 | /* This does the job that build_type_psymtabs would have done. */ |
0d305d5c | 7302 | cutu_reader reader (entry, per_objfile, nullptr, nullptr, false); |
c0ab21c2 TT |
7303 | if (!reader.dummy_p) |
7304 | build_type_psymtabs_reader (&reader, reader.info_ptr, | |
3e225074 | 7305 | reader.comp_unit_die); |
6aa5f3a6 DE |
7306 | |
7307 | return 1; | |
7308 | } | |
7309 | ||
7310 | /* Traversal function for process_skeletonless_type_units. */ | |
7311 | ||
7312 | static int | |
7313 | process_dwo_file_for_skeletonless_type_units (void **slot, void *info) | |
7314 | { | |
7315 | struct dwo_file *dwo_file = (struct dwo_file *) *slot; | |
7316 | ||
7317 | if (dwo_file->tus != NULL) | |
b0b6a987 TT |
7318 | htab_traverse_noresize (dwo_file->tus.get (), |
7319 | process_skeletonless_type_unit, info); | |
6aa5f3a6 DE |
7320 | |
7321 | return 1; | |
7322 | } | |
7323 | ||
7324 | /* Scan all TUs of DWO files, verifying we've processed them. | |
7325 | This is needed in case a TU was emitted without its skeleton. | |
7326 | Note: This can't be done until we know what all the DWO files are. */ | |
7327 | ||
7328 | static void | |
976ca316 | 7329 | process_skeletonless_type_units (dwarf2_per_objfile *per_objfile) |
6aa5f3a6 DE |
7330 | { |
7331 | /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */ | |
976ca316 SM |
7332 | if (get_dwp_file (per_objfile) == NULL |
7333 | && per_objfile->per_bfd->dwo_files != NULL) | |
6aa5f3a6 | 7334 | { |
976ca316 | 7335 | htab_traverse_noresize (per_objfile->per_bfd->dwo_files.get (), |
6aa5f3a6 | 7336 | process_dwo_file_for_skeletonless_type_units, |
976ca316 | 7337 | per_objfile); |
6aa5f3a6 | 7338 | } |
348e048f DE |
7339 | } |
7340 | ||
ed2dc618 | 7341 | /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */ |
95554aad TT |
7342 | |
7343 | static void | |
976ca316 | 7344 | set_partial_user (dwarf2_per_objfile *per_objfile) |
95554aad | 7345 | { |
0d305d5c | 7346 | for (const auto &per_cu : per_objfile->per_bfd->all_comp_units) |
95554aad | 7347 | { |
891813be | 7348 | dwarf2_psymtab *pst = per_cu->v.psymtab; |
95554aad | 7349 | |
36586728 TT |
7350 | if (pst == NULL) |
7351 | continue; | |
7352 | ||
b76e467d | 7353 | for (int j = 0; j < pst->number_of_dependencies; ++j) |
95554aad TT |
7354 | { |
7355 | /* Set the 'user' field only if it is not already set. */ | |
7356 | if (pst->dependencies[j]->user == NULL) | |
7357 | pst->dependencies[j]->user = pst; | |
7358 | } | |
7359 | } | |
7360 | } | |
7361 | ||
93311388 DE |
7362 | /* Build the partial symbol table by doing a quick pass through the |
7363 | .debug_info and .debug_abbrev sections. */ | |
72bf9492 | 7364 | |
93311388 | 7365 | static void |
976ca316 | 7366 | dwarf2_build_psymtabs_hard (dwarf2_per_objfile *per_objfile) |
93311388 | 7367 | { |
976ca316 | 7368 | struct objfile *objfile = per_objfile->objfile; |
84685904 | 7369 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; |
93311388 | 7370 | |
6f738b01 SM |
7371 | dwarf_read_debug_printf ("Building psymtabs of objfile %s ...", |
7372 | objfile_name (objfile)); | |
45cfd468 | 7373 | |
76935768 | 7374 | scoped_restore restore_reading_psyms |
bab287cd | 7375 | = make_scoped_restore (&per_bfd->reading_partial_symbols, true); |
98bfdba5 | 7376 | |
84685904 | 7377 | per_bfd->info.read (objfile); |
91c24f0a | 7378 | |
93311388 DE |
7379 | /* Any cached compilation units will be linked by the per-objfile |
7380 | read_in_chain. Make sure to free them when we're done. */ | |
976ca316 | 7381 | free_cached_comp_units freer (per_objfile); |
72bf9492 | 7382 | |
976ca316 | 7383 | create_all_comp_units (per_objfile); |
b8efb248 | 7384 | build_type_psymtabs (per_objfile); |
c906108c | 7385 | |
60606b2c TT |
7386 | /* Create a temporary address map on a temporary obstack. We later |
7387 | copy this to the final obstack. */ | |
8268c778 | 7388 | auto_obstack temp_obstack; |
791afaa2 TT |
7389 | |
7390 | scoped_restore save_psymtabs_addrmap | |
84685904 | 7391 | = make_scoped_restore (&per_bfd->partial_symtabs->psymtabs_addrmap, |
791afaa2 | 7392 | addrmap_create_mutable (&temp_obstack)); |
72bf9492 | 7393 | |
0d305d5c | 7394 | for (const auto &per_cu : per_bfd->all_comp_units) |
3d5afab3 TV |
7395 | { |
7396 | if (per_cu->v.psymtab != NULL) | |
7397 | /* In case a forward DW_TAG_imported_unit has read the CU already. */ | |
7398 | continue; | |
0d305d5c | 7399 | process_psymtab_comp_unit (per_cu.get (), per_objfile, false, |
ab432490 | 7400 | language_minimal); |
3d5afab3 | 7401 | } |
ff013f42 | 7402 | |
6aa5f3a6 | 7403 | /* This has to wait until we read the CUs, we need the list of DWOs. */ |
976ca316 | 7404 | process_skeletonless_type_units (per_objfile); |
6aa5f3a6 DE |
7405 | |
7406 | /* Now that all TUs have been processed we can fill in the dependencies. */ | |
84685904 | 7407 | if (per_bfd->type_unit_groups != NULL) |
6aa5f3a6 | 7408 | { |
84685904 | 7409 | htab_traverse_noresize (per_bfd->type_unit_groups.get (), |
976ca316 | 7410 | build_type_psymtab_dependencies, per_objfile); |
6aa5f3a6 DE |
7411 | } |
7412 | ||
6f738b01 | 7413 | if (dwarf_read_debug > 0) |
976ca316 | 7414 | print_tu_stats (per_objfile); |
6aa5f3a6 | 7415 | |
976ca316 | 7416 | set_partial_user (per_objfile); |
95554aad | 7417 | |
84685904 TT |
7418 | per_bfd->partial_symtabs->psymtabs_addrmap |
7419 | = addrmap_create_fixed (per_bfd->partial_symtabs->psymtabs_addrmap, | |
7420 | per_bfd->partial_symtabs->obstack ()); | |
791afaa2 TT |
7421 | /* At this point we want to keep the address map. */ |
7422 | save_psymtabs_addrmap.release (); | |
ff013f42 | 7423 | |
6f738b01 SM |
7424 | dwarf_read_debug_printf ("Done building psymtabs of %s", |
7425 | objfile_name (objfile)); | |
ae038cb0 DJ |
7426 | } |
7427 | ||
dee91e82 DE |
7428 | /* Load the partial DIEs for a secondary CU into memory. |
7429 | This is also used when rereading a primary CU with load_all_dies. */ | |
c5b7e1cb | 7430 | |
dee91e82 | 7431 | static void |
ab432490 | 7432 | load_partial_comp_unit (dwarf2_per_cu_data *this_cu, |
2e671100 SM |
7433 | dwarf2_per_objfile *per_objfile, |
7434 | dwarf2_cu *existing_cu) | |
dee91e82 | 7435 | { |
2e671100 | 7436 | cutu_reader reader (this_cu, per_objfile, nullptr, existing_cu, false); |
c0ab21c2 TT |
7437 | |
7438 | if (!reader.dummy_p) | |
7439 | { | |
7440 | prepare_one_comp_unit (reader.cu, reader.comp_unit_die, | |
7441 | language_minimal); | |
7442 | ||
7443 | /* Check if comp unit has_children. | |
7444 | If so, read the rest of the partial symbols from this comp unit. | |
7445 | If not, there's no more debug_info for this comp unit. */ | |
3e225074 | 7446 | if (reader.comp_unit_die->has_children) |
c0ab21c2 | 7447 | load_partial_dies (&reader, reader.info_ptr, 0); |
6751ebae TT |
7448 | |
7449 | reader.keep (); | |
c0ab21c2 | 7450 | } |
ae038cb0 DJ |
7451 | } |
7452 | ||
ae038cb0 | 7453 | static void |
976ca316 | 7454 | read_comp_units_from_section (dwarf2_per_objfile *per_objfile, |
36586728 | 7455 | struct dwarf2_section_info *section, |
f1902523 | 7456 | struct dwarf2_section_info *abbrev_section, |
b8efb248 TT |
7457 | unsigned int is_dwz, |
7458 | htab_up &types_htab, | |
7459 | rcuh_kind section_kind) | |
ae038cb0 | 7460 | { |
d521ce57 | 7461 | const gdb_byte *info_ptr; |
976ca316 | 7462 | struct objfile *objfile = per_objfile->objfile; |
be391dca | 7463 | |
6f738b01 SM |
7464 | dwarf_read_debug_printf ("Reading %s for %s", |
7465 | section->get_name (), | |
7466 | section->get_file_name ()); | |
bf6af496 | 7467 | |
96b79293 | 7468 | section->read (objfile); |
ae038cb0 | 7469 | |
36586728 | 7470 | info_ptr = section->buffer; |
6e70227d | 7471 | |
36586728 | 7472 | while (info_ptr < section->buffer + section->size) |
ae038cb0 | 7473 | { |
473ab964 | 7474 | dwarf2_per_cu_data_up this_cu; |
ae038cb0 | 7475 | |
9c541725 | 7476 | sect_offset sect_off = (sect_offset) (info_ptr - section->buffer); |
ae038cb0 | 7477 | |
f1902523 | 7478 | comp_unit_head cu_header; |
976ca316 | 7479 | read_and_check_comp_unit_head (per_objfile, &cu_header, section, |
ed2dc618 | 7480 | abbrev_section, info_ptr, |
b8efb248 | 7481 | section_kind); |
ae038cb0 DJ |
7482 | |
7483 | /* Save the compilation unit for later lookup. */ | |
f1902523 | 7484 | if (cu_header.unit_type != DW_UT_type) |
976ca316 | 7485 | this_cu = per_objfile->per_bfd->allocate_per_cu (); |
f1902523 JK |
7486 | else |
7487 | { | |
b8efb248 TT |
7488 | if (types_htab == nullptr) |
7489 | types_htab = allocate_signatured_type_table (); | |
7490 | ||
976ca316 | 7491 | auto sig_type = per_objfile->per_bfd->allocate_signatured_type (); |
b8efb248 | 7492 | signatured_type *sig_ptr = sig_type.get (); |
f1902523 JK |
7493 | sig_type->signature = cu_header.signature; |
7494 | sig_type->type_offset_in_tu = cu_header.type_cu_offset_in_tu; | |
473ab964 | 7495 | this_cu.reset (sig_type.release ()); |
b8efb248 TT |
7496 | |
7497 | void **slot = htab_find_slot (types_htab.get (), sig_ptr, INSERT); | |
7498 | gdb_assert (slot != nullptr); | |
7499 | if (*slot != nullptr) | |
7500 | complaint (_("debug type entry at offset %s is duplicate to" | |
7501 | " the entry at offset %s, signature %s"), | |
7502 | sect_offset_str (sect_off), | |
7503 | sect_offset_str (sig_ptr->sect_off), | |
7504 | hex_string (sig_ptr->signature)); | |
7505 | *slot = sig_ptr; | |
f1902523 JK |
7506 | } |
7507 | this_cu->is_debug_types = (cu_header.unit_type == DW_UT_type); | |
9c541725 | 7508 | this_cu->sect_off = sect_off; |
f1902523 | 7509 | this_cu->length = cu_header.length + cu_header.initial_length_size; |
36586728 | 7510 | this_cu->is_dwz = is_dwz; |
8a0459fd | 7511 | this_cu->section = section; |
ae038cb0 | 7512 | |
ae038cb0 | 7513 | info_ptr = info_ptr + this_cu->length; |
0d305d5c | 7514 | per_objfile->per_bfd->all_comp_units.push_back (std::move (this_cu)); |
ae038cb0 | 7515 | } |
36586728 TT |
7516 | } |
7517 | ||
7518 | /* Create a list of all compilation units in OBJFILE. | |
7519 | This is only done for -readnow and building partial symtabs. */ | |
7520 | ||
7521 | static void | |
976ca316 | 7522 | create_all_comp_units (dwarf2_per_objfile *per_objfile) |
36586728 | 7523 | { |
b8efb248 TT |
7524 | htab_up types_htab; |
7525 | ||
976ca316 | 7526 | read_comp_units_from_section (per_objfile, &per_objfile->per_bfd->info, |
b8efb248 TT |
7527 | &per_objfile->per_bfd->abbrev, 0, |
7528 | types_htab, rcuh_kind::COMPILE); | |
7529 | for (dwarf2_section_info §ion : per_objfile->per_bfd->types) | |
7530 | read_comp_units_from_section (per_objfile, §ion, | |
7531 | &per_objfile->per_bfd->abbrev, 0, | |
7532 | types_htab, rcuh_kind::TYPE); | |
36586728 | 7533 | |
976ca316 | 7534 | dwz_file *dwz = dwarf2_get_dwz_file (per_objfile->per_bfd); |
4db1a1dc | 7535 | if (dwz != NULL) |
b8efb248 TT |
7536 | read_comp_units_from_section (per_objfile, &dwz->info, &dwz->abbrev, 1, |
7537 | types_htab, rcuh_kind::COMPILE); | |
7538 | ||
7539 | per_objfile->per_bfd->signatured_types = std::move (types_htab); | |
c906108c SS |
7540 | } |
7541 | ||
5734ee8b | 7542 | /* Process all loaded DIEs for compilation unit CU, starting at |
cdc07690 | 7543 | FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation |
5734ee8b | 7544 | unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or |
cdc07690 YQ |
7545 | DW_AT_ranges). See the comments of add_partial_subprogram on how |
7546 | SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */ | |
c906108c | 7547 | |
72bf9492 DJ |
7548 | static void |
7549 | scan_partial_symbols (struct partial_die_info *first_die, CORE_ADDR *lowpc, | |
cdc07690 YQ |
7550 | CORE_ADDR *highpc, int set_addrmap, |
7551 | struct dwarf2_cu *cu) | |
c906108c | 7552 | { |
72bf9492 | 7553 | struct partial_die_info *pdi; |
c906108c | 7554 | |
91c24f0a DC |
7555 | /* Now, march along the PDI's, descending into ones which have |
7556 | interesting children but skipping the children of the other ones, | |
7557 | until we reach the end of the compilation unit. */ | |
c906108c | 7558 | |
72bf9492 | 7559 | pdi = first_die; |
91c24f0a | 7560 | |
72bf9492 DJ |
7561 | while (pdi != NULL) |
7562 | { | |
52356b79 | 7563 | pdi->fixup (cu); |
c906108c | 7564 | |
f55ee35c | 7565 | /* Anonymous namespaces or modules have no name but have interesting |
91c24f0a DC |
7566 | children, so we need to look at them. Ditto for anonymous |
7567 | enums. */ | |
933c6fe4 | 7568 | |
7d00ffec | 7569 | if (pdi->raw_name != NULL || pdi->tag == DW_TAG_namespace |
95554aad | 7570 | || pdi->tag == DW_TAG_module || pdi->tag == DW_TAG_enumeration_type |
b1dc1806 XR |
7571 | || pdi->tag == DW_TAG_imported_unit |
7572 | || pdi->tag == DW_TAG_inlined_subroutine) | |
c906108c | 7573 | { |
72bf9492 | 7574 | switch (pdi->tag) |
c906108c SS |
7575 | { |
7576 | case DW_TAG_subprogram: | |
b1dc1806 | 7577 | case DW_TAG_inlined_subroutine: |
cdc07690 | 7578 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
f9b5d5ea TV |
7579 | if (cu->language == language_cplus) |
7580 | scan_partial_symbols (pdi->die_child, lowpc, highpc, | |
7581 | set_addrmap, cu); | |
c906108c | 7582 | break; |
72929c62 | 7583 | case DW_TAG_constant: |
c906108c SS |
7584 | case DW_TAG_variable: |
7585 | case DW_TAG_typedef: | |
91c24f0a | 7586 | case DW_TAG_union_type: |
317d2668 TV |
7587 | if (!pdi->is_declaration |
7588 | || (pdi->tag == DW_TAG_variable && pdi->is_external)) | |
63d06c5c | 7589 | { |
72bf9492 | 7590 | add_partial_symbol (pdi, cu); |
63d06c5c DC |
7591 | } |
7592 | break; | |
c906108c | 7593 | case DW_TAG_class_type: |
680b30c7 | 7594 | case DW_TAG_interface_type: |
c906108c | 7595 | case DW_TAG_structure_type: |
72bf9492 | 7596 | if (!pdi->is_declaration) |
c906108c | 7597 | { |
72bf9492 | 7598 | add_partial_symbol (pdi, cu); |
c906108c | 7599 | } |
b7fee5a3 KS |
7600 | if ((cu->language == language_rust |
7601 | || cu->language == language_cplus) && pdi->has_children) | |
e98c9e7c TT |
7602 | scan_partial_symbols (pdi->die_child, lowpc, highpc, |
7603 | set_addrmap, cu); | |
c906108c | 7604 | break; |
91c24f0a | 7605 | case DW_TAG_enumeration_type: |
72bf9492 DJ |
7606 | if (!pdi->is_declaration) |
7607 | add_partial_enumeration (pdi, cu); | |
c906108c SS |
7608 | break; |
7609 | case DW_TAG_base_type: | |
dda83cd7 | 7610 | case DW_TAG_subrange_type: |
c906108c | 7611 | /* File scope base type definitions are added to the partial |
dda83cd7 | 7612 | symbol table. */ |
72bf9492 | 7613 | add_partial_symbol (pdi, cu); |
c906108c | 7614 | break; |
d9fa45fe | 7615 | case DW_TAG_namespace: |
cdc07690 | 7616 | add_partial_namespace (pdi, lowpc, highpc, set_addrmap, cu); |
91c24f0a | 7617 | break; |
5d7cb8df | 7618 | case DW_TAG_module: |
59c35742 AB |
7619 | if (!pdi->is_declaration) |
7620 | add_partial_module (pdi, lowpc, highpc, set_addrmap, cu); | |
5d7cb8df | 7621 | break; |
95554aad TT |
7622 | case DW_TAG_imported_unit: |
7623 | { | |
7624 | struct dwarf2_per_cu_data *per_cu; | |
7625 | ||
f4dc4d17 DE |
7626 | /* For now we don't handle imported units in type units. */ |
7627 | if (cu->per_cu->is_debug_types) | |
7628 | { | |
7629 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
7630 | " supported in type units [in module %s]"), | |
5e22e966 | 7631 | objfile_name (cu->per_objfile->objfile)); |
f4dc4d17 DE |
7632 | } |
7633 | ||
e3b94546 | 7634 | per_cu = dwarf2_find_containing_comp_unit |
5e22e966 | 7635 | (pdi->d.sect_off, pdi->is_dwz, cu->per_objfile); |
95554aad TT |
7636 | |
7637 | /* Go read the partial unit, if needed. */ | |
7638 | if (per_cu->v.psymtab == NULL) | |
ab432490 SM |
7639 | process_psymtab_comp_unit (per_cu, cu->per_objfile, true, |
7640 | cu->language); | |
95554aad | 7641 | |
ae640021 | 7642 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
7643 | } |
7644 | break; | |
74921315 KS |
7645 | case DW_TAG_imported_declaration: |
7646 | add_partial_symbol (pdi, cu); | |
7647 | break; | |
c906108c SS |
7648 | default: |
7649 | break; | |
7650 | } | |
7651 | } | |
7652 | ||
72bf9492 DJ |
7653 | /* If the die has a sibling, skip to the sibling. */ |
7654 | ||
7655 | pdi = pdi->die_sibling; | |
7656 | } | |
7657 | } | |
7658 | ||
7659 | /* Functions used to compute the fully scoped name of a partial DIE. | |
91c24f0a | 7660 | |
72bf9492 | 7661 | Normally, this is simple. For C++, the parent DIE's fully scoped |
9c37b5ae | 7662 | name is concatenated with "::" and the partial DIE's name. |
72bf9492 DJ |
7663 | Enumerators are an exception; they use the scope of their parent |
7664 | enumeration type, i.e. the name of the enumeration type is not | |
7665 | prepended to the enumerator. | |
91c24f0a | 7666 | |
72bf9492 DJ |
7667 | There are two complexities. One is DW_AT_specification; in this |
7668 | case "parent" means the parent of the target of the specification, | |
7669 | instead of the direct parent of the DIE. The other is compilers | |
7670 | which do not emit DW_TAG_namespace; in this case we try to guess | |
7671 | the fully qualified name of structure types from their members' | |
7672 | linkage names. This must be done using the DIE's children rather | |
7673 | than the children of any DW_AT_specification target. We only need | |
7674 | to do this for structures at the top level, i.e. if the target of | |
7675 | any DW_AT_specification (if any; otherwise the DIE itself) does not | |
7676 | have a parent. */ | |
7677 | ||
7678 | /* Compute the scope prefix associated with PDI's parent, in | |
7679 | compilation unit CU. The result will be allocated on CU's | |
7680 | comp_unit_obstack, or a copy of the already allocated PDI->NAME | |
7681 | field. NULL is returned if no prefix is necessary. */ | |
15d034d0 | 7682 | static const char * |
72bf9492 DJ |
7683 | partial_die_parent_scope (struct partial_die_info *pdi, |
7684 | struct dwarf2_cu *cu) | |
7685 | { | |
15d034d0 | 7686 | const char *grandparent_scope; |
72bf9492 | 7687 | struct partial_die_info *parent, *real_pdi; |
91c24f0a | 7688 | |
72bf9492 DJ |
7689 | /* We need to look at our parent DIE; if we have a DW_AT_specification, |
7690 | then this means the parent of the specification DIE. */ | |
7691 | ||
7692 | real_pdi = pdi; | |
72bf9492 | 7693 | while (real_pdi->has_specification) |
fb816e8b | 7694 | { |
122cf0f2 AB |
7695 | auto res = find_partial_die (real_pdi->spec_offset, |
7696 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
7697 | real_pdi = res.pdi; |
7698 | cu = res.cu; | |
7699 | } | |
72bf9492 DJ |
7700 | |
7701 | parent = real_pdi->die_parent; | |
7702 | if (parent == NULL) | |
7703 | return NULL; | |
7704 | ||
7705 | if (parent->scope_set) | |
7706 | return parent->scope; | |
7707 | ||
52356b79 | 7708 | parent->fixup (cu); |
72bf9492 | 7709 | |
10b3939b | 7710 | grandparent_scope = partial_die_parent_scope (parent, cu); |
72bf9492 | 7711 | |
acebe513 UW |
7712 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
7713 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
7714 | Work around this problem here. */ | |
7715 | if (cu->language == language_cplus | |
6e70227d | 7716 | && parent->tag == DW_TAG_namespace |
7d00ffec | 7717 | && strcmp (parent->name (cu), "::") == 0 |
acebe513 UW |
7718 | && grandparent_scope == NULL) |
7719 | { | |
7720 | parent->scope = NULL; | |
7721 | parent->scope_set = 1; | |
7722 | return NULL; | |
7723 | } | |
7724 | ||
0a4b0913 | 7725 | /* Nested subroutines in Fortran get a prefix. */ |
9c6c53f7 SA |
7726 | if (pdi->tag == DW_TAG_enumerator) |
7727 | /* Enumerators should not get the name of the enumeration as a prefix. */ | |
7728 | parent->scope = grandparent_scope; | |
7729 | else if (parent->tag == DW_TAG_namespace | |
f55ee35c | 7730 | || parent->tag == DW_TAG_module |
72bf9492 DJ |
7731 | || parent->tag == DW_TAG_structure_type |
7732 | || parent->tag == DW_TAG_class_type | |
680b30c7 | 7733 | || parent->tag == DW_TAG_interface_type |
ceeb3d5a | 7734 | || parent->tag == DW_TAG_union_type |
0a4b0913 AB |
7735 | || parent->tag == DW_TAG_enumeration_type |
7736 | || (cu->language == language_fortran | |
7737 | && parent->tag == DW_TAG_subprogram | |
7738 | && pdi->tag == DW_TAG_subprogram)) | |
72bf9492 DJ |
7739 | { |
7740 | if (grandparent_scope == NULL) | |
7d00ffec | 7741 | parent->scope = parent->name (cu); |
72bf9492 | 7742 | else |
3e43a32a MS |
7743 | parent->scope = typename_concat (&cu->comp_unit_obstack, |
7744 | grandparent_scope, | |
7d00ffec | 7745 | parent->name (cu), 0, cu); |
72bf9492 | 7746 | } |
72bf9492 DJ |
7747 | else |
7748 | { | |
7749 | /* FIXME drow/2004-04-01: What should we be doing with | |
7750 | function-local names? For partial symbols, we should probably be | |
7751 | ignoring them. */ | |
fa9c3fa0 TT |
7752 | complaint (_("unhandled containing DIE tag %s for DIE at %s"), |
7753 | dwarf_tag_name (parent->tag), | |
7754 | sect_offset_str (pdi->sect_off)); | |
72bf9492 | 7755 | parent->scope = grandparent_scope; |
c906108c SS |
7756 | } |
7757 | ||
72bf9492 DJ |
7758 | parent->scope_set = 1; |
7759 | return parent->scope; | |
7760 | } | |
7761 | ||
7762 | /* Return the fully scoped name associated with PDI, from compilation unit | |
7763 | CU. The result will be allocated with malloc. */ | |
4568ecf9 | 7764 | |
43816ebc | 7765 | static gdb::unique_xmalloc_ptr<char> |
72bf9492 DJ |
7766 | partial_die_full_name (struct partial_die_info *pdi, |
7767 | struct dwarf2_cu *cu) | |
7768 | { | |
15d034d0 | 7769 | const char *parent_scope; |
72bf9492 | 7770 | |
98bfdba5 PA |
7771 | /* If this is a template instantiation, we can not work out the |
7772 | template arguments from partial DIEs. So, unfortunately, we have | |
7773 | to go through the full DIEs. At least any work we do building | |
7774 | types here will be reused if full symbols are loaded later. */ | |
7775 | if (pdi->has_template_arguments) | |
7776 | { | |
52356b79 | 7777 | pdi->fixup (cu); |
98bfdba5 | 7778 | |
7d00ffec | 7779 | if (pdi->name (cu) != NULL && strchr (pdi->name (cu), '<') == NULL) |
98bfdba5 PA |
7780 | { |
7781 | struct die_info *die; | |
7782 | struct attribute attr; | |
7783 | struct dwarf2_cu *ref_cu = cu; | |
7784 | ||
b64f50a1 | 7785 | /* DW_FORM_ref_addr is using section offset. */ |
b4069958 | 7786 | attr.name = (enum dwarf_attribute) 0; |
98bfdba5 | 7787 | attr.form = DW_FORM_ref_addr; |
9c541725 | 7788 | attr.u.unsnd = to_underlying (pdi->sect_off); |
98bfdba5 PA |
7789 | die = follow_die_ref (NULL, &attr, &ref_cu); |
7790 | ||
43816ebc | 7791 | return make_unique_xstrdup (dwarf2_full_name (NULL, die, ref_cu)); |
98bfdba5 PA |
7792 | } |
7793 | } | |
7794 | ||
72bf9492 DJ |
7795 | parent_scope = partial_die_parent_scope (pdi, cu); |
7796 | if (parent_scope == NULL) | |
7797 | return NULL; | |
7798 | else | |
43816ebc | 7799 | return gdb::unique_xmalloc_ptr<char> (typename_concat (NULL, parent_scope, |
7d00ffec TT |
7800 | pdi->name (cu), |
7801 | 0, cu)); | |
c906108c SS |
7802 | } |
7803 | ||
7804 | static void | |
72bf9492 | 7805 | add_partial_symbol (struct partial_die_info *pdi, struct dwarf2_cu *cu) |
c906108c | 7806 | { |
976ca316 SM |
7807 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
7808 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 7809 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c | 7810 | CORE_ADDR addr = 0; |
15d034d0 | 7811 | const char *actual_name = NULL; |
e142c38c DJ |
7812 | CORE_ADDR baseaddr; |
7813 | ||
b3b3bada | 7814 | baseaddr = objfile->text_section_offset (); |
c906108c | 7815 | |
43816ebc TT |
7816 | gdb::unique_xmalloc_ptr<char> built_actual_name |
7817 | = partial_die_full_name (pdi, cu); | |
15d034d0 | 7818 | if (built_actual_name != NULL) |
43816ebc | 7819 | actual_name = built_actual_name.get (); |
63d06c5c | 7820 | |
72bf9492 | 7821 | if (actual_name == NULL) |
7d00ffec | 7822 | actual_name = pdi->name (cu); |
72bf9492 | 7823 | |
76e288d1 TT |
7824 | partial_symbol psymbol; |
7825 | memset (&psymbol, 0, sizeof (psymbol)); | |
7826 | psymbol.ginfo.set_language (cu->language, &objfile->objfile_obstack); | |
a52d653e | 7827 | psymbol.ginfo.set_section_index (-1); |
76e288d1 TT |
7828 | |
7829 | /* The code below indicates that the psymbol should be installed by | |
7830 | setting this. */ | |
7831 | gdb::optional<psymbol_placement> where; | |
7832 | ||
c906108c SS |
7833 | switch (pdi->tag) |
7834 | { | |
b1dc1806 | 7835 | case DW_TAG_inlined_subroutine: |
c906108c | 7836 | case DW_TAG_subprogram: |
79748972 TT |
7837 | addr = (gdbarch_adjust_dwarf2_addr (gdbarch, pdi->lowpc + baseaddr) |
7838 | - baseaddr); | |
0a4b0913 AB |
7839 | if (pdi->is_external |
7840 | || cu->language == language_ada | |
7841 | || (cu->language == language_fortran | |
7842 | && pdi->die_parent != NULL | |
7843 | && pdi->die_parent->tag == DW_TAG_subprogram)) | |
7844 | { | |
dda83cd7 SM |
7845 | /* Normally, only "external" DIEs are part of the global scope. |
7846 | But in Ada and Fortran, we want to be able to access nested | |
7847 | procedures globally. So all Ada and Fortran subprograms are | |
7848 | stored in the global scope. */ | |
76e288d1 | 7849 | where = psymbol_placement::GLOBAL; |
c906108c SS |
7850 | } |
7851 | else | |
76e288d1 TT |
7852 | where = psymbol_placement::STATIC; |
7853 | ||
7854 | psymbol.domain = VAR_DOMAIN; | |
7855 | psymbol.aclass = LOC_BLOCK; | |
a52d653e | 7856 | psymbol.ginfo.set_section_index (SECT_OFF_TEXT (objfile)); |
76e288d1 | 7857 | psymbol.ginfo.value.address = addr; |
0c1b455e TT |
7858 | |
7859 | if (pdi->main_subprogram && actual_name != NULL) | |
7860 | set_objfile_main_name (objfile, actual_name, cu->language); | |
c906108c | 7861 | break; |
72929c62 | 7862 | case DW_TAG_constant: |
76e288d1 TT |
7863 | psymbol.domain = VAR_DOMAIN; |
7864 | psymbol.aclass = LOC_STATIC; | |
7865 | where = (pdi->is_external | |
7866 | ? psymbol_placement::GLOBAL | |
7867 | : psymbol_placement::STATIC); | |
72929c62 | 7868 | break; |
c906108c | 7869 | case DW_TAG_variable: |
95554aad TT |
7870 | if (pdi->d.locdesc) |
7871 | addr = decode_locdesc (pdi->d.locdesc, cu); | |
caac4577 | 7872 | |
95554aad | 7873 | if (pdi->d.locdesc |
caac4577 | 7874 | && addr == 0 |
976ca316 | 7875 | && !per_objfile->per_bfd->has_section_at_zero) |
caac4577 JG |
7876 | { |
7877 | /* A global or static variable may also have been stripped | |
7878 | out by the linker if unused, in which case its address | |
7879 | will be nullified; do not add such variables into partial | |
7880 | symbol table then. */ | |
7881 | } | |
7882 | else if (pdi->is_external) | |
c906108c SS |
7883 | { |
7884 | /* Global Variable. | |
7885 | Don't enter into the minimal symbol tables as there is | |
7886 | a minimal symbol table entry from the ELF symbols already. | |
7887 | Enter into partial symbol table if it has a location | |
7888 | descriptor or a type. | |
7889 | If the location descriptor is missing, new_symbol will create | |
7890 | a LOC_UNRESOLVED symbol, the address of the variable will then | |
7891 | be determined from the minimal symbol table whenever the variable | |
7892 | is referenced. | |
7893 | The address for the partial symbol table entry is not | |
7894 | used by GDB, but it comes in handy for debugging partial symbol | |
7895 | table building. */ | |
7896 | ||
95554aad | 7897 | if (pdi->d.locdesc || pdi->has_type) |
76e288d1 TT |
7898 | { |
7899 | psymbol.domain = VAR_DOMAIN; | |
7900 | psymbol.aclass = LOC_STATIC; | |
a52d653e | 7901 | psymbol.ginfo.set_section_index (SECT_OFF_TEXT (objfile)); |
76e288d1 TT |
7902 | psymbol.ginfo.value.address = addr; |
7903 | where = psymbol_placement::GLOBAL; | |
7904 | } | |
c906108c SS |
7905 | } |
7906 | else | |
7907 | { | |
ff908ebf AW |
7908 | int has_loc = pdi->d.locdesc != NULL; |
7909 | ||
7910 | /* Static Variable. Skip symbols whose value we cannot know (those | |
7911 | without location descriptors or constant values). */ | |
7912 | if (!has_loc && !pdi->has_const_value) | |
43816ebc | 7913 | return; |
ff908ebf | 7914 | |
76e288d1 TT |
7915 | psymbol.domain = VAR_DOMAIN; |
7916 | psymbol.aclass = LOC_STATIC; | |
a52d653e | 7917 | psymbol.ginfo.set_section_index (SECT_OFF_TEXT (objfile)); |
76e288d1 TT |
7918 | if (has_loc) |
7919 | psymbol.ginfo.value.address = addr; | |
7920 | where = psymbol_placement::STATIC; | |
c906108c SS |
7921 | } |
7922 | break; | |
d8f62e84 | 7923 | case DW_TAG_array_type: |
c906108c SS |
7924 | case DW_TAG_typedef: |
7925 | case DW_TAG_base_type: | |
a02abb62 | 7926 | case DW_TAG_subrange_type: |
76e288d1 TT |
7927 | psymbol.domain = VAR_DOMAIN; |
7928 | psymbol.aclass = LOC_TYPEDEF; | |
7929 | where = psymbol_placement::STATIC; | |
c906108c | 7930 | break; |
74921315 | 7931 | case DW_TAG_imported_declaration: |
72bf9492 | 7932 | case DW_TAG_namespace: |
76e288d1 TT |
7933 | psymbol.domain = VAR_DOMAIN; |
7934 | psymbol.aclass = LOC_TYPEDEF; | |
7935 | where = psymbol_placement::GLOBAL; | |
72bf9492 | 7936 | break; |
530e8392 | 7937 | case DW_TAG_module: |
a5fd13a9 | 7938 | /* With Fortran 77 there might be a "BLOCK DATA" module |
dda83cd7 SM |
7939 | available without any name. If so, we skip the module as it |
7940 | doesn't bring any value. */ | |
a5fd13a9 | 7941 | if (actual_name != nullptr) |
76e288d1 TT |
7942 | { |
7943 | psymbol.domain = MODULE_DOMAIN; | |
7944 | psymbol.aclass = LOC_TYPEDEF; | |
7945 | where = psymbol_placement::GLOBAL; | |
7946 | } | |
530e8392 | 7947 | break; |
c906108c | 7948 | case DW_TAG_class_type: |
680b30c7 | 7949 | case DW_TAG_interface_type: |
c906108c SS |
7950 | case DW_TAG_structure_type: |
7951 | case DW_TAG_union_type: | |
7952 | case DW_TAG_enumeration_type: | |
fa4028e9 | 7953 | /* Skip external references. The DWARF standard says in the section |
dda83cd7 SM |
7954 | about "Structure, Union, and Class Type Entries": "An incomplete |
7955 | structure, union or class type is represented by a structure, | |
7956 | union or class entry that does not have a byte size attribute | |
7957 | and that has a DW_AT_declaration attribute." */ | |
fa4028e9 | 7958 | if (!pdi->has_byte_size && pdi->is_declaration) |
43816ebc | 7959 | return; |
fa4028e9 | 7960 | |
63d06c5c DC |
7961 | /* NOTE: carlton/2003-10-07: See comment in new_symbol about |
7962 | static vs. global. */ | |
76e288d1 TT |
7963 | psymbol.domain = STRUCT_DOMAIN; |
7964 | psymbol.aclass = LOC_TYPEDEF; | |
7965 | where = (cu->language == language_cplus | |
7966 | ? psymbol_placement::GLOBAL | |
7967 | : psymbol_placement::STATIC); | |
c906108c SS |
7968 | break; |
7969 | case DW_TAG_enumerator: | |
76e288d1 TT |
7970 | psymbol.domain = VAR_DOMAIN; |
7971 | psymbol.aclass = LOC_CONST; | |
7972 | where = (cu->language == language_cplus | |
7973 | ? psymbol_placement::GLOBAL | |
7974 | : psymbol_placement::STATIC); | |
c906108c SS |
7975 | break; |
7976 | default: | |
7977 | break; | |
7978 | } | |
76e288d1 TT |
7979 | |
7980 | if (where.has_value ()) | |
7981 | { | |
f049a313 TT |
7982 | if (built_actual_name != nullptr) |
7983 | actual_name = objfile->intern (actual_name); | |
bcfe6157 TT |
7984 | if (pdi->linkage_name == nullptr || cu->language == language_ada) |
7985 | psymbol.ginfo.set_linkage_name (actual_name); | |
7986 | else | |
7987 | { | |
7988 | psymbol.ginfo.set_demangled_name (actual_name, | |
7989 | &objfile->objfile_obstack); | |
7990 | psymbol.ginfo.set_linkage_name (pdi->linkage_name); | |
7991 | } | |
7b249e47 TT |
7992 | cu->per_cu->v.psymtab->add_psymbol |
7993 | (psymbol, *where, per_objfile->per_bfd->partial_symtabs.get (), | |
7994 | objfile); | |
76e288d1 | 7995 | } |
c906108c SS |
7996 | } |
7997 | ||
5c4e30ca DC |
7998 | /* Read a partial die corresponding to a namespace; also, add a symbol |
7999 | corresponding to that namespace to the symbol table. NAMESPACE is | |
8000 | the name of the enclosing namespace. */ | |
91c24f0a | 8001 | |
72bf9492 DJ |
8002 | static void |
8003 | add_partial_namespace (struct partial_die_info *pdi, | |
91c24f0a | 8004 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
cdc07690 | 8005 | int set_addrmap, struct dwarf2_cu *cu) |
91c24f0a | 8006 | { |
72bf9492 | 8007 | /* Add a symbol for the namespace. */ |
e7c27a73 | 8008 | |
72bf9492 | 8009 | add_partial_symbol (pdi, cu); |
5c4e30ca DC |
8010 | |
8011 | /* Now scan partial symbols in that namespace. */ | |
8012 | ||
91c24f0a | 8013 | if (pdi->has_children) |
cdc07690 | 8014 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
91c24f0a DC |
8015 | } |
8016 | ||
5d7cb8df JK |
8017 | /* Read a partial die corresponding to a Fortran module. */ |
8018 | ||
8019 | static void | |
8020 | add_partial_module (struct partial_die_info *pdi, CORE_ADDR *lowpc, | |
cdc07690 | 8021 | CORE_ADDR *highpc, int set_addrmap, struct dwarf2_cu *cu) |
5d7cb8df | 8022 | { |
530e8392 KB |
8023 | /* Add a symbol for the namespace. */ |
8024 | ||
8025 | add_partial_symbol (pdi, cu); | |
8026 | ||
f55ee35c | 8027 | /* Now scan partial symbols in that module. */ |
5d7cb8df JK |
8028 | |
8029 | if (pdi->has_children) | |
cdc07690 | 8030 | scan_partial_symbols (pdi->die_child, lowpc, highpc, set_addrmap, cu); |
5d7cb8df JK |
8031 | } |
8032 | ||
b1dc1806 XR |
8033 | /* Read a partial die corresponding to a subprogram or an inlined |
8034 | subprogram and create a partial symbol for that subprogram. | |
8035 | When the CU language allows it, this routine also defines a partial | |
8036 | symbol for each nested subprogram that this subprogram contains. | |
8037 | If SET_ADDRMAP is true, record the covered ranges in the addrmap. | |
8038 | Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI. | |
6e70227d | 8039 | |
cdc07690 YQ |
8040 | PDI may also be a lexical block, in which case we simply search |
8041 | recursively for subprograms defined inside that lexical block. | |
bc30ff58 JB |
8042 | Again, this is only performed when the CU language allows this |
8043 | type of definitions. */ | |
8044 | ||
8045 | static void | |
8046 | add_partial_subprogram (struct partial_die_info *pdi, | |
8047 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
cdc07690 | 8048 | int set_addrmap, struct dwarf2_cu *cu) |
bc30ff58 | 8049 | { |
b1dc1806 | 8050 | if (pdi->tag == DW_TAG_subprogram || pdi->tag == DW_TAG_inlined_subroutine) |
bc30ff58 JB |
8051 | { |
8052 | if (pdi->has_pc_info) | |
dda83cd7 SM |
8053 | { |
8054 | if (pdi->lowpc < *lowpc) | |
8055 | *lowpc = pdi->lowpc; | |
8056 | if (pdi->highpc > *highpc) | |
8057 | *highpc = pdi->highpc; | |
cdc07690 | 8058 | if (set_addrmap) |
5734ee8b | 8059 | { |
5e22e966 | 8060 | struct objfile *objfile = cu->per_objfile->objfile; |
84685904 | 8061 | dwarf2_per_bfd *per_bfd = cu->per_objfile->per_bfd; |
08feed99 | 8062 | struct gdbarch *gdbarch = objfile->arch (); |
3e29f34a | 8063 | CORE_ADDR baseaddr; |
b926417a TT |
8064 | CORE_ADDR this_highpc; |
8065 | CORE_ADDR this_lowpc; | |
5734ee8b | 8066 | |
b3b3bada | 8067 | baseaddr = objfile->text_section_offset (); |
b926417a TT |
8068 | this_lowpc |
8069 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8070 | pdi->lowpc + baseaddr) | |
8071 | - baseaddr); | |
8072 | this_highpc | |
8073 | = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
8074 | pdi->highpc + baseaddr) | |
8075 | - baseaddr); | |
84685904 | 8076 | addrmap_set_empty (per_bfd->partial_symtabs->psymtabs_addrmap, |
b926417a | 8077 | this_lowpc, this_highpc - 1, |
9291a0cd | 8078 | cu->per_cu->v.psymtab); |
5734ee8b | 8079 | } |
dda83cd7 | 8080 | } |
481860b3 GB |
8081 | |
8082 | if (pdi->has_pc_info || (!pdi->is_external && pdi->may_be_inlined)) | |
8083 | { | |
dda83cd7 | 8084 | if (!pdi->is_declaration) |
e8d05480 JB |
8085 | /* Ignore subprogram DIEs that do not have a name, they are |
8086 | illegal. Do not emit a complaint at this point, we will | |
8087 | do so when we convert this psymtab into a symtab. */ | |
7d00ffec | 8088 | if (pdi->name (cu)) |
e8d05480 | 8089 | add_partial_symbol (pdi, cu); |
dda83cd7 | 8090 | } |
bc30ff58 | 8091 | } |
6e70227d | 8092 | |
bc30ff58 JB |
8093 | if (! pdi->has_children) |
8094 | return; | |
8095 | ||
0a4b0913 | 8096 | if (cu->language == language_ada || cu->language == language_fortran) |
bc30ff58 JB |
8097 | { |
8098 | pdi = pdi->die_child; | |
8099 | while (pdi != NULL) | |
8100 | { | |
52356b79 | 8101 | pdi->fixup (cu); |
bc30ff58 | 8102 | if (pdi->tag == DW_TAG_subprogram |
b1dc1806 | 8103 | || pdi->tag == DW_TAG_inlined_subroutine |
bc30ff58 | 8104 | || pdi->tag == DW_TAG_lexical_block) |
cdc07690 | 8105 | add_partial_subprogram (pdi, lowpc, highpc, set_addrmap, cu); |
bc30ff58 JB |
8106 | pdi = pdi->die_sibling; |
8107 | } | |
8108 | } | |
8109 | } | |
8110 | ||
91c24f0a DC |
8111 | /* Read a partial die corresponding to an enumeration type. */ |
8112 | ||
72bf9492 DJ |
8113 | static void |
8114 | add_partial_enumeration (struct partial_die_info *enum_pdi, | |
8115 | struct dwarf2_cu *cu) | |
91c24f0a | 8116 | { |
72bf9492 | 8117 | struct partial_die_info *pdi; |
91c24f0a | 8118 | |
7d00ffec | 8119 | if (enum_pdi->name (cu) != NULL) |
72bf9492 DJ |
8120 | add_partial_symbol (enum_pdi, cu); |
8121 | ||
8122 | pdi = enum_pdi->die_child; | |
8123 | while (pdi) | |
91c24f0a | 8124 | { |
7d00ffec | 8125 | if (pdi->tag != DW_TAG_enumerator || pdi->raw_name == NULL) |
b98664d3 | 8126 | complaint (_("malformed enumerator DIE ignored")); |
91c24f0a | 8127 | else |
72bf9492 DJ |
8128 | add_partial_symbol (pdi, cu); |
8129 | pdi = pdi->die_sibling; | |
91c24f0a | 8130 | } |
91c24f0a DC |
8131 | } |
8132 | ||
6caca83c CC |
8133 | /* Return the initial uleb128 in the die at INFO_PTR. */ |
8134 | ||
8135 | static unsigned int | |
d521ce57 | 8136 | peek_abbrev_code (bfd *abfd, const gdb_byte *info_ptr) |
6caca83c CC |
8137 | { |
8138 | unsigned int bytes_read; | |
8139 | ||
8140 | return read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8141 | } | |
8142 | ||
685af9cd TT |
8143 | /* Read the initial uleb128 in the die at INFO_PTR in compilation unit |
8144 | READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation. | |
8145 | ||
4bb7a0a7 DJ |
8146 | Return the corresponding abbrev, or NULL if the number is zero (indicating |
8147 | an empty DIE). In either case *BYTES_READ will be set to the length of | |
8148 | the initial number. */ | |
8149 | ||
7c32eebb | 8150 | static const struct abbrev_info * |
685af9cd TT |
8151 | peek_die_abbrev (const die_reader_specs &reader, |
8152 | const gdb_byte *info_ptr, unsigned int *bytes_read) | |
4bb7a0a7 | 8153 | { |
685af9cd | 8154 | dwarf2_cu *cu = reader.cu; |
0280fdcc | 8155 | bfd *abfd = reader.abfd; |
685af9cd TT |
8156 | unsigned int abbrev_number |
8157 | = read_unsigned_leb128 (abfd, info_ptr, bytes_read); | |
4bb7a0a7 DJ |
8158 | |
8159 | if (abbrev_number == 0) | |
8160 | return NULL; | |
8161 | ||
7c32eebb TT |
8162 | const abbrev_info *abbrev |
8163 | = reader.abbrev_table->lookup_abbrev (abbrev_number); | |
4bb7a0a7 DJ |
8164 | if (!abbrev) |
8165 | { | |
422b9917 | 8166 | error (_("Dwarf Error: Could not find abbrev number %d in %s" |
9d8780f0 | 8167 | " at offset %s [in module %s]"), |
422b9917 | 8168 | abbrev_number, cu->per_cu->is_debug_types ? "TU" : "CU", |
9d8780f0 | 8169 | sect_offset_str (cu->header.sect_off), bfd_get_filename (abfd)); |
4bb7a0a7 DJ |
8170 | } |
8171 | ||
8172 | return abbrev; | |
8173 | } | |
8174 | ||
93311388 DE |
8175 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8176 | Returns a pointer to the end of a series of DIEs, terminated by an empty | |
4bb7a0a7 DJ |
8177 | DIE. Any children of the skipped DIEs will also be skipped. */ |
8178 | ||
d521ce57 TT |
8179 | static const gdb_byte * |
8180 | skip_children (const struct die_reader_specs *reader, const gdb_byte *info_ptr) | |
4bb7a0a7 | 8181 | { |
4bb7a0a7 DJ |
8182 | while (1) |
8183 | { | |
685af9cd | 8184 | unsigned int bytes_read; |
7c32eebb TT |
8185 | const abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, |
8186 | &bytes_read); | |
685af9cd | 8187 | |
4bb7a0a7 DJ |
8188 | if (abbrev == NULL) |
8189 | return info_ptr + bytes_read; | |
8190 | else | |
dee91e82 | 8191 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
4bb7a0a7 DJ |
8192 | } |
8193 | } | |
8194 | ||
93311388 DE |
8195 | /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER. |
8196 | INFO_PTR should point just after the initial uleb128 of a DIE, and the | |
4bb7a0a7 DJ |
8197 | abbrev corresponding to that skipped uleb128 should be passed in |
8198 | ABBREV. Returns a pointer to this DIE's sibling, skipping any | |
8199 | children. */ | |
8200 | ||
d521ce57 TT |
8201 | static const gdb_byte * |
8202 | skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr, | |
7c32eebb | 8203 | const struct abbrev_info *abbrev) |
4bb7a0a7 DJ |
8204 | { |
8205 | unsigned int bytes_read; | |
8206 | struct attribute attr; | |
dee91e82 DE |
8207 | bfd *abfd = reader->abfd; |
8208 | struct dwarf2_cu *cu = reader->cu; | |
d521ce57 | 8209 | const gdb_byte *buffer = reader->buffer; |
f664829e | 8210 | const gdb_byte *buffer_end = reader->buffer_end; |
4bb7a0a7 DJ |
8211 | unsigned int form, i; |
8212 | ||
8213 | for (i = 0; i < abbrev->num_attrs; i++) | |
8214 | { | |
8215 | /* The only abbrev we care about is DW_AT_sibling. */ | |
8216 | if (abbrev->attrs[i].name == DW_AT_sibling) | |
8217 | { | |
7a5f294d | 8218 | read_attribute (reader, &attr, &abbrev->attrs[i], info_ptr); |
4bb7a0a7 | 8219 | if (attr.form == DW_FORM_ref_addr) |
b98664d3 | 8220 | complaint (_("ignoring absolute DW_AT_sibling")); |
4bb7a0a7 | 8221 | else |
b9502d3f | 8222 | { |
0826b30a | 8223 | sect_offset off = attr.get_ref_die_offset (); |
9c541725 | 8224 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
b9502d3f WN |
8225 | |
8226 | if (sibling_ptr < info_ptr) | |
b98664d3 | 8227 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 8228 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 8229 | reader->die_section->overflow_complaint (); |
b9502d3f WN |
8230 | else |
8231 | return sibling_ptr; | |
8232 | } | |
4bb7a0a7 DJ |
8233 | } |
8234 | ||
8235 | /* If it isn't DW_AT_sibling, skip this attribute. */ | |
8236 | form = abbrev->attrs[i].form; | |
8237 | skip_attribute: | |
8238 | switch (form) | |
8239 | { | |
4bb7a0a7 | 8240 | case DW_FORM_ref_addr: |
ae411497 TT |
8241 | /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3 |
8242 | and later it is offset sized. */ | |
8243 | if (cu->header.version == 2) | |
8244 | info_ptr += cu->header.addr_size; | |
8245 | else | |
8246 | info_ptr += cu->header.offset_size; | |
8247 | break; | |
36586728 TT |
8248 | case DW_FORM_GNU_ref_alt: |
8249 | info_ptr += cu->header.offset_size; | |
8250 | break; | |
ae411497 | 8251 | case DW_FORM_addr: |
4bb7a0a7 DJ |
8252 | info_ptr += cu->header.addr_size; |
8253 | break; | |
8254 | case DW_FORM_data1: | |
8255 | case DW_FORM_ref1: | |
8256 | case DW_FORM_flag: | |
8fe0f950 | 8257 | case DW_FORM_strx1: |
4bb7a0a7 DJ |
8258 | info_ptr += 1; |
8259 | break; | |
2dc7f7b3 | 8260 | case DW_FORM_flag_present: |
43988095 | 8261 | case DW_FORM_implicit_const: |
2dc7f7b3 | 8262 | break; |
4bb7a0a7 DJ |
8263 | case DW_FORM_data2: |
8264 | case DW_FORM_ref2: | |
8fe0f950 | 8265 | case DW_FORM_strx2: |
4bb7a0a7 DJ |
8266 | info_ptr += 2; |
8267 | break; | |
8fe0f950 AT |
8268 | case DW_FORM_strx3: |
8269 | info_ptr += 3; | |
8270 | break; | |
4bb7a0a7 DJ |
8271 | case DW_FORM_data4: |
8272 | case DW_FORM_ref4: | |
8fe0f950 | 8273 | case DW_FORM_strx4: |
4bb7a0a7 DJ |
8274 | info_ptr += 4; |
8275 | break; | |
8276 | case DW_FORM_data8: | |
8277 | case DW_FORM_ref8: | |
55f1336d | 8278 | case DW_FORM_ref_sig8: |
4bb7a0a7 DJ |
8279 | info_ptr += 8; |
8280 | break; | |
0224619f JK |
8281 | case DW_FORM_data16: |
8282 | info_ptr += 16; | |
8283 | break; | |
4bb7a0a7 | 8284 | case DW_FORM_string: |
9b1c24c8 | 8285 | read_direct_string (abfd, info_ptr, &bytes_read); |
4bb7a0a7 DJ |
8286 | info_ptr += bytes_read; |
8287 | break; | |
2dc7f7b3 | 8288 | case DW_FORM_sec_offset: |
4bb7a0a7 | 8289 | case DW_FORM_strp: |
36586728 | 8290 | case DW_FORM_GNU_strp_alt: |
4bb7a0a7 DJ |
8291 | info_ptr += cu->header.offset_size; |
8292 | break; | |
2dc7f7b3 | 8293 | case DW_FORM_exprloc: |
4bb7a0a7 DJ |
8294 | case DW_FORM_block: |
8295 | info_ptr += read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8296 | info_ptr += bytes_read; | |
8297 | break; | |
8298 | case DW_FORM_block1: | |
8299 | info_ptr += 1 + read_1_byte (abfd, info_ptr); | |
8300 | break; | |
8301 | case DW_FORM_block2: | |
8302 | info_ptr += 2 + read_2_bytes (abfd, info_ptr); | |
8303 | break; | |
8304 | case DW_FORM_block4: | |
8305 | info_ptr += 4 + read_4_bytes (abfd, info_ptr); | |
8306 | break; | |
336d760d | 8307 | case DW_FORM_addrx: |
cf532bd1 | 8308 | case DW_FORM_strx: |
4bb7a0a7 DJ |
8309 | case DW_FORM_sdata: |
8310 | case DW_FORM_udata: | |
8311 | case DW_FORM_ref_udata: | |
3019eac3 DE |
8312 | case DW_FORM_GNU_addr_index: |
8313 | case DW_FORM_GNU_str_index: | |
18a8505e | 8314 | case DW_FORM_rnglistx: |
41144253 | 8315 | case DW_FORM_loclistx: |
d521ce57 | 8316 | info_ptr = safe_skip_leb128 (info_ptr, buffer_end); |
4bb7a0a7 DJ |
8317 | break; |
8318 | case DW_FORM_indirect: | |
8319 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
8320 | info_ptr += bytes_read; | |
8321 | /* We need to continue parsing from here, so just go back to | |
8322 | the top. */ | |
8323 | goto skip_attribute; | |
8324 | ||
8325 | default: | |
3e43a32a MS |
8326 | error (_("Dwarf Error: Cannot handle %s " |
8327 | "in DWARF reader [in module %s]"), | |
4bb7a0a7 DJ |
8328 | dwarf_form_name (form), |
8329 | bfd_get_filename (abfd)); | |
8330 | } | |
8331 | } | |
8332 | ||
8333 | if (abbrev->has_children) | |
dee91e82 | 8334 | return skip_children (reader, info_ptr); |
4bb7a0a7 DJ |
8335 | else |
8336 | return info_ptr; | |
8337 | } | |
8338 | ||
93311388 | 8339 | /* Locate ORIG_PDI's sibling. |
dee91e82 | 8340 | INFO_PTR should point to the start of the next DIE after ORIG_PDI. */ |
91c24f0a | 8341 | |
d521ce57 | 8342 | static const gdb_byte * |
dee91e82 DE |
8343 | locate_pdi_sibling (const struct die_reader_specs *reader, |
8344 | struct partial_die_info *orig_pdi, | |
d521ce57 | 8345 | const gdb_byte *info_ptr) |
91c24f0a DC |
8346 | { |
8347 | /* Do we know the sibling already? */ | |
72bf9492 | 8348 | |
91c24f0a DC |
8349 | if (orig_pdi->sibling) |
8350 | return orig_pdi->sibling; | |
8351 | ||
8352 | /* Are there any children to deal with? */ | |
8353 | ||
8354 | if (!orig_pdi->has_children) | |
8355 | return info_ptr; | |
8356 | ||
4bb7a0a7 | 8357 | /* Skip the children the long way. */ |
91c24f0a | 8358 | |
dee91e82 | 8359 | return skip_children (reader, info_ptr); |
91c24f0a DC |
8360 | } |
8361 | ||
257e7a09 | 8362 | /* Expand this partial symbol table into a full symbol table. SELF is |
442e4d9c | 8363 | not NULL. */ |
c906108c | 8364 | |
891813be TT |
8365 | void |
8366 | dwarf2_psymtab::read_symtab (struct objfile *objfile) | |
c906108c | 8367 | { |
976ca316 | 8368 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
ed2dc618 | 8369 | |
976ca316 | 8370 | gdb_assert (!per_objfile->symtab_set_p (per_cu_data)); |
af758d11 | 8371 | |
077cbab2 TT |
8372 | /* If this psymtab is constructed from a debug-only objfile, the |
8373 | has_section_at_zero flag will not necessarily be correct. We | |
8374 | can get the correct value for this flag by looking at the data | |
8375 | associated with the (presumably stripped) associated objfile. */ | |
8376 | if (objfile->separate_debug_objfile_backlink) | |
c906108c | 8377 | { |
976ca316 | 8378 | dwarf2_per_objfile *per_objfile_backlink |
077cbab2 | 8379 | = get_dwarf2_per_objfile (objfile->separate_debug_objfile_backlink); |
c906108c | 8380 | |
976ca316 SM |
8381 | per_objfile->per_bfd->has_section_at_zero |
8382 | = per_objfile_backlink->per_bfd->has_section_at_zero; | |
077cbab2 | 8383 | } |
98bfdba5 | 8384 | |
8566b89b | 8385 | expand_psymtab (objfile); |
95554aad | 8386 | |
976ca316 | 8387 | process_cu_includes (per_objfile); |
c906108c | 8388 | } |
9cdd5dbd DE |
8389 | \f |
8390 | /* Reading in full CUs. */ | |
c906108c | 8391 | |
10b3939b DJ |
8392 | /* Add PER_CU to the queue. */ |
8393 | ||
8394 | static void | |
120ce1b5 SM |
8395 | queue_comp_unit (dwarf2_per_cu_data *per_cu, |
8396 | dwarf2_per_objfile *per_objfile, | |
95554aad | 8397 | enum language pretend_language) |
10b3939b | 8398 | { |
10b3939b | 8399 | per_cu->queued = 1; |
08ac5771 SM |
8400 | |
8401 | gdb_assert (per_objfile->per_bfd->queue.has_value ()); | |
8402 | per_cu->per_bfd->queue->emplace (per_cu, per_objfile, pretend_language); | |
10b3939b DJ |
8403 | } |
8404 | ||
616c069a SM |
8405 | /* If PER_CU is not yet expanded of queued for expansion, add it to the queue. |
8406 | ||
89e63ee4 DE |
8407 | If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a |
8408 | dependency. | |
69d751e3 | 8409 | |
616c069a SM |
8410 | Return true if maybe_queue_comp_unit requires the caller to load the CU's |
8411 | DIEs, false otherwise. | |
8412 | ||
8413 | Explanation: there is an invariant that if a CU is queued for expansion | |
8414 | (present in `dwarf2_per_bfd::queue`), then its DIEs are loaded | |
8415 | (a dwarf2_cu object exists for this CU, and `dwarf2_per_objfile::get_cu` | |
8416 | returns non-nullptr). If the CU gets enqueued by this function but its DIEs | |
8417 | are not yet loaded, the the caller must load the CU's DIEs to ensure the | |
8418 | invariant is respected. | |
8419 | ||
8420 | The caller is therefore not required to load the CU's DIEs (we return false) | |
8421 | if: | |
8422 | ||
8423 | - the CU is already expanded, and therefore does not get enqueued | |
8424 | - the CU gets enqueued for expansion, but its DIEs are already loaded | |
8425 | ||
8426 | Note that the caller should not use this function's return value as an | |
8427 | indicator of whether the CU's DIEs are loaded right now, it should check | |
8428 | that by calling `dwarf2_per_objfile::get_cu` instead. */ | |
0907af0c DE |
8429 | |
8430 | static int | |
89e63ee4 | 8431 | maybe_queue_comp_unit (struct dwarf2_cu *dependent_cu, |
120ce1b5 SM |
8432 | dwarf2_per_cu_data *per_cu, |
8433 | dwarf2_per_objfile *per_objfile, | |
0907af0c DE |
8434 | enum language pretend_language) |
8435 | { | |
8436 | /* We may arrive here during partial symbol reading, if we need full | |
8437 | DIEs to process an unusual case (e.g. template arguments). Do | |
8438 | not queue PER_CU, just tell our caller to load its DIEs. */ | |
1859c670 | 8439 | if (per_cu->per_bfd->reading_partial_symbols) |
0907af0c | 8440 | { |
7188ed02 SM |
8441 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
8442 | ||
8443 | if (cu == NULL || cu->dies == NULL) | |
0907af0c DE |
8444 | return 1; |
8445 | return 0; | |
8446 | } | |
8447 | ||
8448 | /* Mark the dependence relation so that we don't flush PER_CU | |
8449 | too early. */ | |
89e63ee4 | 8450 | if (dependent_cu != NULL) |
347212b8 | 8451 | dependent_cu->add_dependence (per_cu); |
0907af0c DE |
8452 | |
8453 | /* If it's already on the queue, we have nothing to do. */ | |
8454 | if (per_cu->queued) | |
de53369b SM |
8455 | { |
8456 | /* Verify the invariant that if a CU is queued for expansion, its DIEs are | |
8457 | loaded. */ | |
8458 | gdb_assert (per_objfile->get_cu (per_cu) != nullptr); | |
616c069a SM |
8459 | |
8460 | /* If the CU is queued for expansion, it should not already be | |
8461 | expanded. */ | |
8462 | gdb_assert (!per_objfile->symtab_set_p (per_cu)); | |
8463 | ||
8464 | /* The DIEs are already loaded, the caller doesn't need to do it. */ | |
de53369b SM |
8465 | return 0; |
8466 | } | |
0907af0c | 8467 | |
616c069a SM |
8468 | bool queued = false; |
8469 | if (!per_objfile->symtab_set_p (per_cu)) | |
8470 | { | |
8471 | /* Add it to the queue. */ | |
8472 | queue_comp_unit (per_cu, per_objfile, pretend_language); | |
8473 | queued = true; | |
8474 | } | |
8475 | ||
0907af0c DE |
8476 | /* If the compilation unit is already loaded, just mark it as |
8477 | used. */ | |
7188ed02 SM |
8478 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
8479 | if (cu != nullptr) | |
616c069a | 8480 | cu->last_used = 0; |
0907af0c | 8481 | |
616c069a SM |
8482 | /* Ask the caller to load the CU's DIEs if the CU got enqueued for expansion |
8483 | and the DIEs are not already loaded. */ | |
8484 | return queued && cu == nullptr; | |
0907af0c DE |
8485 | } |
8486 | ||
10b3939b DJ |
8487 | /* Process the queue. */ |
8488 | ||
8489 | static void | |
976ca316 | 8490 | process_queue (dwarf2_per_objfile *per_objfile) |
10b3939b | 8491 | { |
6f738b01 SM |
8492 | dwarf_read_debug_printf ("Expanding one or more symtabs of objfile %s ...", |
8493 | objfile_name (per_objfile->objfile)); | |
45cfd468 | 8494 | |
03dd20cc DJ |
8495 | /* The queue starts out with one item, but following a DIE reference |
8496 | may load a new CU, adding it to the end of the queue. */ | |
08ac5771 | 8497 | while (!per_objfile->per_bfd->queue->empty ()) |
10b3939b | 8498 | { |
08ac5771 | 8499 | dwarf2_queue_item &item = per_objfile->per_bfd->queue->front (); |
7188ed02 | 8500 | dwarf2_per_cu_data *per_cu = item.per_cu; |
39856def | 8501 | |
976ca316 | 8502 | if (!per_objfile->symtab_set_p (per_cu)) |
f4dc4d17 | 8503 | { |
976ca316 | 8504 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
f4dc4d17 | 8505 | |
7188ed02 SM |
8506 | /* Skip dummy CUs. */ |
8507 | if (cu != nullptr) | |
73be47f5 | 8508 | { |
7188ed02 SM |
8509 | unsigned int debug_print_threshold; |
8510 | char buf[100]; | |
8511 | ||
8512 | if (per_cu->is_debug_types) | |
8513 | { | |
8514 | struct signatured_type *sig_type = | |
8515 | (struct signatured_type *) per_cu; | |
8516 | ||
8517 | sprintf (buf, "TU %s at offset %s", | |
8518 | hex_string (sig_type->signature), | |
8519 | sect_offset_str (per_cu->sect_off)); | |
8520 | /* There can be 100s of TUs. | |
8521 | Only print them in verbose mode. */ | |
8522 | debug_print_threshold = 2; | |
8523 | } | |
8524 | else | |
8525 | { | |
8526 | sprintf (buf, "CU at offset %s", | |
8527 | sect_offset_str (per_cu->sect_off)); | |
8528 | debug_print_threshold = 1; | |
8529 | } | |
247f5c4f | 8530 | |
7188ed02 | 8531 | if (dwarf_read_debug >= debug_print_threshold) |
6f738b01 | 8532 | dwarf_read_debug_printf ("Expanding symtab of %s", buf); |
f4dc4d17 | 8533 | |
7188ed02 SM |
8534 | if (per_cu->is_debug_types) |
8535 | process_full_type_unit (cu, item.pretend_language); | |
8536 | else | |
8537 | process_full_comp_unit (cu, item.pretend_language); | |
f4dc4d17 | 8538 | |
7188ed02 | 8539 | if (dwarf_read_debug >= debug_print_threshold) |
6f738b01 | 8540 | dwarf_read_debug_printf ("Done expanding %s", buf); |
7188ed02 | 8541 | } |
f4dc4d17 | 8542 | } |
10b3939b | 8543 | |
7188ed02 | 8544 | per_cu->queued = 0; |
08ac5771 | 8545 | per_objfile->per_bfd->queue->pop (); |
10b3939b DJ |
8546 | } |
8547 | ||
6f738b01 SM |
8548 | dwarf_read_debug_printf ("Done expanding symtabs of %s.", |
8549 | objfile_name (per_objfile->objfile)); | |
10b3939b DJ |
8550 | } |
8551 | ||
10b3939b DJ |
8552 | /* Read in full symbols for PST, and anything it depends on. */ |
8553 | ||
8566b89b TT |
8554 | void |
8555 | dwarf2_psymtab::expand_psymtab (struct objfile *objfile) | |
c906108c | 8556 | { |
af758d11 | 8557 | gdb_assert (!readin_p (objfile)); |
95554aad | 8558 | |
17ee85fc TT |
8559 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); |
8560 | free_cached_comp_units freer (per_objfile); | |
48993951 | 8561 | expand_dependencies (objfile); |
aaa75496 | 8562 | |
97a1449a | 8563 | dw2_do_instantiate_symtab (per_cu_data, per_objfile, false); |
5717c425 | 8564 | gdb_assert (get_compunit_symtab (objfile) != nullptr); |
10b3939b DJ |
8565 | } |
8566 | ||
af758d11 SM |
8567 | /* See psympriv.h. */ |
8568 | ||
8569 | bool | |
8570 | dwarf2_psymtab::readin_p (struct objfile *objfile) const | |
8571 | { | |
8572 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); | |
8573 | return per_objfile->symtab_set_p (per_cu_data); | |
8574 | } | |
8575 | ||
8576 | /* See psympriv.h. */ | |
8577 | ||
8578 | compunit_symtab * | |
8579 | dwarf2_psymtab::get_compunit_symtab (struct objfile *objfile) const | |
8580 | { | |
8581 | dwarf2_per_objfile *per_objfile = get_dwarf2_per_objfile (objfile); | |
8582 | return per_objfile->get_symtab (per_cu_data); | |
8583 | } | |
8584 | ||
dee91e82 DE |
8585 | /* Trivial hash function for die_info: the hash value of a DIE |
8586 | is its offset in .debug_info for this objfile. */ | |
10b3939b | 8587 | |
dee91e82 DE |
8588 | static hashval_t |
8589 | die_hash (const void *item) | |
10b3939b | 8590 | { |
9a3c8263 | 8591 | const struct die_info *die = (const struct die_info *) item; |
6502dd73 | 8592 | |
9c541725 | 8593 | return to_underlying (die->sect_off); |
dee91e82 | 8594 | } |
63d06c5c | 8595 | |
dee91e82 DE |
8596 | /* Trivial comparison function for die_info structures: two DIEs |
8597 | are equal if they have the same offset. */ | |
98bfdba5 | 8598 | |
dee91e82 DE |
8599 | static int |
8600 | die_eq (const void *item_lhs, const void *item_rhs) | |
8601 | { | |
9a3c8263 SM |
8602 | const struct die_info *die_lhs = (const struct die_info *) item_lhs; |
8603 | const struct die_info *die_rhs = (const struct die_info *) item_rhs; | |
c906108c | 8604 | |
9c541725 | 8605 | return die_lhs->sect_off == die_rhs->sect_off; |
dee91e82 | 8606 | } |
c906108c | 8607 | |
4a636814 SM |
8608 | /* Load the DIEs associated with PER_CU into memory. |
8609 | ||
8610 | In some cases, the caller, while reading partial symbols, will need to load | |
8611 | the full symbols for the CU for some reason. It will already have a | |
8612 | dwarf2_cu object for THIS_CU and pass it as EXISTING_CU, so it can be re-used | |
8613 | rather than creating a new one. */ | |
c906108c | 8614 | |
dee91e82 | 8615 | static void |
ab432490 SM |
8616 | load_full_comp_unit (dwarf2_per_cu_data *this_cu, |
8617 | dwarf2_per_objfile *per_objfile, | |
4a636814 | 8618 | dwarf2_cu *existing_cu, |
c0ab21c2 TT |
8619 | bool skip_partial, |
8620 | enum language pretend_language) | |
dee91e82 | 8621 | { |
c0ab21c2 TT |
8622 | gdb_assert (! this_cu->is_debug_types); |
8623 | ||
7188ed02 | 8624 | cutu_reader reader (this_cu, per_objfile, NULL, existing_cu, skip_partial); |
c0ab21c2 TT |
8625 | if (reader.dummy_p) |
8626 | return; | |
8627 | ||
8628 | struct dwarf2_cu *cu = reader.cu; | |
8629 | const gdb_byte *info_ptr = reader.info_ptr; | |
6caca83c | 8630 | |
dee91e82 DE |
8631 | gdb_assert (cu->die_hash == NULL); |
8632 | cu->die_hash = | |
8633 | htab_create_alloc_ex (cu->header.length / 12, | |
8634 | die_hash, | |
8635 | die_eq, | |
8636 | NULL, | |
8637 | &cu->comp_unit_obstack, | |
8638 | hashtab_obstack_allocate, | |
8639 | dummy_obstack_deallocate); | |
e142c38c | 8640 | |
3e225074 | 8641 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
8642 | reader.comp_unit_die->child |
8643 | = read_die_and_siblings (&reader, reader.info_ptr, | |
8644 | &info_ptr, reader.comp_unit_die); | |
8645 | cu->dies = reader.comp_unit_die; | |
dee91e82 | 8646 | /* comp_unit_die is not stored in die_hash, no need. */ |
10b3939b DJ |
8647 | |
8648 | /* We try not to read any attributes in this function, because not | |
9cdd5dbd | 8649 | all CUs needed for references have been loaded yet, and symbol |
10b3939b | 8650 | table processing isn't initialized. But we have to set the CU language, |
dee91e82 DE |
8651 | or we won't be able to build types correctly. |
8652 | Similarly, if we do not read the producer, we can not apply | |
8653 | producer-specific interpretation. */ | |
c0ab21c2 | 8654 | prepare_one_comp_unit (cu, cu->dies, pretend_language); |
6751ebae TT |
8655 | |
8656 | reader.keep (); | |
10b3939b DJ |
8657 | } |
8658 | ||
3da10d80 KS |
8659 | /* Add a DIE to the delayed physname list. */ |
8660 | ||
8661 | static void | |
8662 | add_to_method_list (struct type *type, int fnfield_index, int index, | |
8663 | const char *name, struct die_info *die, | |
8664 | struct dwarf2_cu *cu) | |
8665 | { | |
8666 | struct delayed_method_info mi; | |
8667 | mi.type = type; | |
8668 | mi.fnfield_index = fnfield_index; | |
8669 | mi.index = index; | |
8670 | mi.name = name; | |
8671 | mi.die = die; | |
c89b44cd | 8672 | cu->method_list.push_back (mi); |
3da10d80 KS |
8673 | } |
8674 | ||
3693fdb3 PA |
8675 | /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like |
8676 | "const" / "volatile". If so, decrements LEN by the length of the | |
8677 | modifier and return true. Otherwise return false. */ | |
8678 | ||
8679 | template<size_t N> | |
8680 | static bool | |
8681 | check_modifier (const char *physname, size_t &len, const char (&mod)[N]) | |
8682 | { | |
8683 | size_t mod_len = sizeof (mod) - 1; | |
8684 | if (len > mod_len && startswith (physname + (len - mod_len), mod)) | |
8685 | { | |
8686 | len -= mod_len; | |
8687 | return true; | |
8688 | } | |
8689 | return false; | |
8690 | } | |
8691 | ||
3da10d80 KS |
8692 | /* Compute the physnames of any methods on the CU's method list. |
8693 | ||
8694 | The computation of method physnames is delayed in order to avoid the | |
8695 | (bad) condition that one of the method's formal parameters is of an as yet | |
8696 | incomplete type. */ | |
8697 | ||
8698 | static void | |
8699 | compute_delayed_physnames (struct dwarf2_cu *cu) | |
8700 | { | |
3693fdb3 | 8701 | /* Only C++ delays computing physnames. */ |
c89b44cd | 8702 | if (cu->method_list.empty ()) |
3693fdb3 PA |
8703 | return; |
8704 | gdb_assert (cu->language == language_cplus); | |
8705 | ||
52941706 | 8706 | for (const delayed_method_info &mi : cu->method_list) |
3da10d80 | 8707 | { |
1d06ead6 | 8708 | const char *physname; |
3da10d80 | 8709 | struct fn_fieldlist *fn_flp |
c89b44cd TT |
8710 | = &TYPE_FN_FIELDLIST (mi.type, mi.fnfield_index); |
8711 | physname = dwarf2_physname (mi.name, mi.die, cu); | |
8712 | TYPE_FN_FIELD_PHYSNAME (fn_flp->fn_fields, mi.index) | |
005e54bb | 8713 | = physname ? physname : ""; |
3693fdb3 PA |
8714 | |
8715 | /* Since there's no tag to indicate whether a method is a | |
8716 | const/volatile overload, extract that information out of the | |
8717 | demangled name. */ | |
8718 | if (physname != NULL) | |
8719 | { | |
8720 | size_t len = strlen (physname); | |
8721 | ||
8722 | while (1) | |
8723 | { | |
8724 | if (physname[len] == ')') /* shortcut */ | |
8725 | break; | |
8726 | else if (check_modifier (physname, len, " const")) | |
c89b44cd | 8727 | TYPE_FN_FIELD_CONST (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 | 8728 | else if (check_modifier (physname, len, " volatile")) |
c89b44cd | 8729 | TYPE_FN_FIELD_VOLATILE (fn_flp->fn_fields, mi.index) = 1; |
3693fdb3 PA |
8730 | else |
8731 | break; | |
8732 | } | |
8733 | } | |
3da10d80 | 8734 | } |
c89b44cd TT |
8735 | |
8736 | /* The list is no longer needed. */ | |
8737 | cu->method_list.clear (); | |
3da10d80 KS |
8738 | } |
8739 | ||
a766d390 DE |
8740 | /* Go objects should be embedded in a DW_TAG_module DIE, |
8741 | and it's not clear if/how imported objects will appear. | |
8742 | To keep Go support simple until that's worked out, | |
8743 | go back through what we've read and create something usable. | |
8744 | We could do this while processing each DIE, and feels kinda cleaner, | |
8745 | but that way is more invasive. | |
8746 | This is to, for example, allow the user to type "p var" or "b main" | |
8747 | without having to specify the package name, and allow lookups | |
8748 | of module.object to work in contexts that use the expression | |
8749 | parser. */ | |
8750 | ||
8751 | static void | |
8752 | fixup_go_packaging (struct dwarf2_cu *cu) | |
8753 | { | |
421d1616 | 8754 | gdb::unique_xmalloc_ptr<char> package_name; |
a766d390 DE |
8755 | struct pending *list; |
8756 | int i; | |
8757 | ||
c24bdb02 | 8758 | for (list = *cu->get_builder ()->get_global_symbols (); |
804d2729 TT |
8759 | list != NULL; |
8760 | list = list->next) | |
a766d390 DE |
8761 | { |
8762 | for (i = 0; i < list->nsyms; ++i) | |
8763 | { | |
8764 | struct symbol *sym = list->symbol[i]; | |
8765 | ||
c1b5c1eb | 8766 | if (sym->language () == language_go |
a766d390 DE |
8767 | && SYMBOL_CLASS (sym) == LOC_BLOCK) |
8768 | { | |
421d1616 TT |
8769 | gdb::unique_xmalloc_ptr<char> this_package_name |
8770 | (go_symbol_package_name (sym)); | |
a766d390 DE |
8771 | |
8772 | if (this_package_name == NULL) | |
8773 | continue; | |
8774 | if (package_name == NULL) | |
421d1616 | 8775 | package_name = std::move (this_package_name); |
a766d390 DE |
8776 | else |
8777 | { | |
5e22e966 | 8778 | struct objfile *objfile = cu->per_objfile->objfile; |
421d1616 | 8779 | if (strcmp (package_name.get (), this_package_name.get ()) != 0) |
b98664d3 | 8780 | complaint (_("Symtab %s has objects from two different Go packages: %s and %s"), |
08be3fe3 DE |
8781 | (symbol_symtab (sym) != NULL |
8782 | ? symtab_to_filename_for_display | |
8783 | (symbol_symtab (sym)) | |
e3b94546 | 8784 | : objfile_name (objfile)), |
421d1616 | 8785 | this_package_name.get (), package_name.get ()); |
a766d390 DE |
8786 | } |
8787 | } | |
8788 | } | |
8789 | } | |
8790 | ||
8791 | if (package_name != NULL) | |
8792 | { | |
5e22e966 | 8793 | struct objfile *objfile = cu->per_objfile->objfile; |
be1e3d3e | 8794 | const char *saved_package_name = objfile->intern (package_name.get ()); |
19f392bc UW |
8795 | struct type *type = init_type (objfile, TYPE_CODE_MODULE, 0, |
8796 | saved_package_name); | |
a766d390 DE |
8797 | struct symbol *sym; |
8798 | ||
8c14c3a3 | 8799 | sym = new (&objfile->objfile_obstack) symbol; |
d3ecddab | 8800 | sym->set_language (language_go, &objfile->objfile_obstack); |
4d4eaa30 | 8801 | sym->compute_and_set_names (saved_package_name, false, objfile->per_bfd); |
a766d390 DE |
8802 | /* This is not VAR_DOMAIN because we want a way to ensure a lookup of, |
8803 | e.g., "main" finds the "main" module and not C's main(). */ | |
8804 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; | |
f1e6e072 | 8805 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
a766d390 DE |
8806 | SYMBOL_TYPE (sym) = type; |
8807 | ||
c24bdb02 | 8808 | add_symbol_to_list (sym, cu->get_builder ()->get_global_symbols ()); |
a766d390 DE |
8809 | } |
8810 | } | |
8811 | ||
c9317f21 TT |
8812 | /* Allocate a fully-qualified name consisting of the two parts on the |
8813 | obstack. */ | |
8814 | ||
8815 | static const char * | |
8816 | rust_fully_qualify (struct obstack *obstack, const char *p1, const char *p2) | |
8817 | { | |
8818 | return obconcat (obstack, p1, "::", p2, (char *) NULL); | |
8819 | } | |
8820 | ||
9c6a1327 TT |
8821 | /* A helper that allocates a variant part to attach to a Rust enum |
8822 | type. OBSTACK is where the results should be allocated. TYPE is | |
8823 | the type we're processing. DISCRIMINANT_INDEX is the index of the | |
57d02173 TT |
8824 | discriminant. It must be the index of one of the fields of TYPE, |
8825 | or -1 to mean there is no discriminant (univariant enum). | |
9c6a1327 TT |
8826 | DEFAULT_INDEX is the index of the default field; or -1 if there is |
8827 | no default. RANGES is indexed by "effective" field number (the | |
8828 | field index, but omitting the discriminant and default fields) and | |
8829 | must hold the discriminant values used by the variants. Note that | |
8830 | RANGES must have a lifetime at least as long as OBSTACK -- either | |
8831 | already allocated on it, or static. */ | |
c9317f21 | 8832 | |
9c6a1327 TT |
8833 | static void |
8834 | alloc_rust_variant (struct obstack *obstack, struct type *type, | |
8835 | int discriminant_index, int default_index, | |
8836 | gdb::array_view<discriminant_range> ranges) | |
8837 | { | |
57d02173 TT |
8838 | /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. */ |
8839 | gdb_assert (discriminant_index == -1 | |
8840 | || (discriminant_index >= 0 | |
8841 | && discriminant_index < type->num_fields ())); | |
c9317f21 | 8842 | gdb_assert (default_index == -1 |
1f704f76 | 8843 | || (default_index >= 0 && default_index < type->num_fields ())); |
c9317f21 | 8844 | |
9c6a1327 | 8845 | /* We have one variant for each non-discriminant field. */ |
57d02173 TT |
8846 | int n_variants = type->num_fields (); |
8847 | if (discriminant_index != -1) | |
8848 | --n_variants; | |
c9317f21 | 8849 | |
9c6a1327 TT |
8850 | variant *variants = new (obstack) variant[n_variants]; |
8851 | int var_idx = 0; | |
8852 | int range_idx = 0; | |
1f704f76 | 8853 | for (int i = 0; i < type->num_fields (); ++i) |
9c6a1327 TT |
8854 | { |
8855 | if (i == discriminant_index) | |
8856 | continue; | |
c9317f21 | 8857 | |
9c6a1327 TT |
8858 | variants[var_idx].first_field = i; |
8859 | variants[var_idx].last_field = i + 1; | |
8860 | ||
8861 | /* The default field does not need a range, but other fields do. | |
8862 | We skipped the discriminant above. */ | |
8863 | if (i != default_index) | |
8864 | { | |
8865 | variants[var_idx].discriminants = ranges.slice (range_idx, 1); | |
8866 | ++range_idx; | |
8867 | } | |
c9317f21 | 8868 | |
9c6a1327 TT |
8869 | ++var_idx; |
8870 | } | |
8871 | ||
8872 | gdb_assert (range_idx == ranges.size ()); | |
8873 | gdb_assert (var_idx == n_variants); | |
8874 | ||
8875 | variant_part *part = new (obstack) variant_part; | |
8876 | part->discriminant_index = discriminant_index; | |
57d02173 TT |
8877 | /* If there is no discriminant, then whether it is signed is of no |
8878 | consequence. */ | |
8879 | part->is_unsigned | |
8880 | = (discriminant_index == -1 | |
8881 | ? false | |
c6d940a9 | 8882 | : type->field (discriminant_index).type ()->is_unsigned ()); |
9c6a1327 TT |
8883 | part->variants = gdb::array_view<variant> (variants, n_variants); |
8884 | ||
8885 | void *storage = obstack_alloc (obstack, sizeof (gdb::array_view<variant_part>)); | |
8886 | gdb::array_view<variant_part> *prop_value | |
8887 | = new (storage) gdb::array_view<variant_part> (part, 1); | |
c9317f21 | 8888 | |
9c6a1327 | 8889 | struct dynamic_prop prop; |
8c2e4e06 | 8890 | prop.set_variant_parts (prop_value); |
9c6a1327 | 8891 | |
5c54719c | 8892 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
c9317f21 TT |
8893 | } |
8894 | ||
8895 | /* Some versions of rustc emitted enums in an unusual way. | |
8896 | ||
8897 | Ordinary enums were emitted as unions. The first element of each | |
8898 | structure in the union was named "RUST$ENUM$DISR". This element | |
8899 | held the discriminant. | |
8900 | ||
8901 | These versions of Rust also implemented the "non-zero" | |
8902 | optimization. When the enum had two values, and one is empty and | |
8903 | the other holds a pointer that cannot be zero, the pointer is used | |
8904 | as the discriminant, with a zero value meaning the empty variant. | |
8905 | Here, the union's first member is of the form | |
8906 | RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname> | |
8907 | where the fieldnos are the indices of the fields that should be | |
8908 | traversed in order to find the field (which may be several fields deep) | |
8909 | and the variantname is the name of the variant of the case when the | |
8910 | field is zero. | |
8911 | ||
8912 | This function recognizes whether TYPE is of one of these forms, | |
8913 | and, if so, smashes it to be a variant type. */ | |
8914 | ||
8915 | static void | |
8916 | quirk_rust_enum (struct type *type, struct objfile *objfile) | |
8917 | { | |
78134374 | 8918 | gdb_assert (type->code () == TYPE_CODE_UNION); |
c9317f21 TT |
8919 | |
8920 | /* We don't need to deal with empty enums. */ | |
1f704f76 | 8921 | if (type->num_fields () == 0) |
c9317f21 TT |
8922 | return; |
8923 | ||
8924 | #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$" | |
1f704f76 | 8925 | if (type->num_fields () == 1 |
c9317f21 TT |
8926 | && startswith (TYPE_FIELD_NAME (type, 0), RUST_ENUM_PREFIX)) |
8927 | { | |
8928 | const char *name = TYPE_FIELD_NAME (type, 0) + strlen (RUST_ENUM_PREFIX); | |
8929 | ||
8930 | /* Decode the field name to find the offset of the | |
8931 | discriminant. */ | |
8932 | ULONGEST bit_offset = 0; | |
940da03e | 8933 | struct type *field_type = type->field (0).type (); |
c9317f21 TT |
8934 | while (name[0] >= '0' && name[0] <= '9') |
8935 | { | |
8936 | char *tail; | |
8937 | unsigned long index = strtoul (name, &tail, 10); | |
8938 | name = tail; | |
8939 | if (*name != '$' | |
1f704f76 | 8940 | || index >= field_type->num_fields () |
c9317f21 TT |
8941 | || (TYPE_FIELD_LOC_KIND (field_type, index) |
8942 | != FIELD_LOC_KIND_BITPOS)) | |
8943 | { | |
b98664d3 | 8944 | complaint (_("Could not parse Rust enum encoding string \"%s\"" |
c9317f21 TT |
8945 | "[in module %s]"), |
8946 | TYPE_FIELD_NAME (type, 0), | |
8947 | objfile_name (objfile)); | |
8948 | return; | |
8949 | } | |
8950 | ++name; | |
8951 | ||
8952 | bit_offset += TYPE_FIELD_BITPOS (field_type, index); | |
940da03e | 8953 | field_type = field_type->field (index).type (); |
c9317f21 TT |
8954 | } |
8955 | ||
9c6a1327 TT |
8956 | /* Smash this type to be a structure type. We have to do this |
8957 | because the type has already been recorded. */ | |
67607e24 | 8958 | type->set_code (TYPE_CODE_STRUCT); |
5e33d5f4 | 8959 | type->set_num_fields (3); |
9c6a1327 | 8960 | /* Save the field we care about. */ |
ceacbf6e | 8961 | struct field saved_field = type->field (0); |
3cabb6b0 SM |
8962 | type->set_fields |
8963 | ((struct field *) TYPE_ZALLOC (type, 3 * sizeof (struct field))); | |
c9317f21 | 8964 | |
9c6a1327 | 8965 | /* Put the discriminant at index 0. */ |
5d14b6e5 | 8966 | type->field (0).set_type (field_type); |
9c6a1327 TT |
8967 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; |
8968 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; | |
ceacbf6e | 8969 | SET_FIELD_BITPOS (type->field (0), bit_offset); |
c9317f21 TT |
8970 | |
8971 | /* The order of fields doesn't really matter, so put the real | |
8972 | field at index 1 and the data-less field at index 2. */ | |
ceacbf6e | 8973 | type->field (1) = saved_field; |
9c6a1327 | 8974 | TYPE_FIELD_NAME (type, 1) |
940da03e SM |
8975 | = rust_last_path_segment (type->field (1).type ()->name ()); |
8976 | type->field (1).type ()->set_name | |
7d93a1e0 | 8977 | (rust_fully_qualify (&objfile->objfile_obstack, type->name (), |
d0e39ea2 | 8978 | TYPE_FIELD_NAME (type, 1))); |
c9317f21 TT |
8979 | |
8980 | const char *dataless_name | |
7d93a1e0 | 8981 | = rust_fully_qualify (&objfile->objfile_obstack, type->name (), |
c9317f21 TT |
8982 | name); |
8983 | struct type *dataless_type = init_type (objfile, TYPE_CODE_VOID, 0, | |
8984 | dataless_name); | |
5d14b6e5 | 8985 | type->field (2).set_type (dataless_type); |
c9317f21 TT |
8986 | /* NAME points into the original discriminant name, which |
8987 | already has the correct lifetime. */ | |
9c6a1327 | 8988 | TYPE_FIELD_NAME (type, 2) = name; |
ceacbf6e | 8989 | SET_FIELD_BITPOS (type->field (2), 0); |
c9317f21 | 8990 | |
9c6a1327 TT |
8991 | /* Indicate that this is a variant type. */ |
8992 | static discriminant_range ranges[1] = { { 0, 0 } }; | |
8993 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, 1, ranges); | |
c9317f21 | 8994 | } |
77c2dba3 TT |
8995 | /* A union with a single anonymous field is probably an old-style |
8996 | univariant enum. */ | |
1f704f76 | 8997 | else if (type->num_fields () == 1 && streq (TYPE_FIELD_NAME (type, 0), "")) |
c9317f21 | 8998 | { |
c9317f21 TT |
8999 | /* Smash this type to be a structure type. We have to do this |
9000 | because the type has already been recorded. */ | |
67607e24 | 9001 | type->set_code (TYPE_CODE_STRUCT); |
c9317f21 | 9002 | |
940da03e | 9003 | struct type *field_type = type->field (0).type (); |
c9317f21 | 9004 | const char *variant_name |
7d93a1e0 | 9005 | = rust_last_path_segment (field_type->name ()); |
9c6a1327 | 9006 | TYPE_FIELD_NAME (type, 0) = variant_name; |
d0e39ea2 SM |
9007 | field_type->set_name |
9008 | (rust_fully_qualify (&objfile->objfile_obstack, | |
7d93a1e0 | 9009 | type->name (), variant_name)); |
57d02173 TT |
9010 | |
9011 | alloc_rust_variant (&objfile->objfile_obstack, type, -1, 0, {}); | |
c9317f21 TT |
9012 | } |
9013 | else | |
9014 | { | |
9015 | struct type *disr_type = nullptr; | |
1f704f76 | 9016 | for (int i = 0; i < type->num_fields (); ++i) |
c9317f21 | 9017 | { |
940da03e | 9018 | disr_type = type->field (i).type (); |
c9317f21 | 9019 | |
78134374 | 9020 | if (disr_type->code () != TYPE_CODE_STRUCT) |
a037790e TT |
9021 | { |
9022 | /* All fields of a true enum will be structs. */ | |
9023 | return; | |
9024 | } | |
1f704f76 | 9025 | else if (disr_type->num_fields () == 0) |
c9317f21 TT |
9026 | { |
9027 | /* Could be data-less variant, so keep going. */ | |
a037790e | 9028 | disr_type = nullptr; |
c9317f21 TT |
9029 | } |
9030 | else if (strcmp (TYPE_FIELD_NAME (disr_type, 0), | |
9031 | "RUST$ENUM$DISR") != 0) | |
9032 | { | |
9033 | /* Not a Rust enum. */ | |
9034 | return; | |
9035 | } | |
9036 | else | |
9037 | { | |
9038 | /* Found one. */ | |
9039 | break; | |
9040 | } | |
9041 | } | |
9042 | ||
9043 | /* If we got here without a discriminant, then it's probably | |
9044 | just a union. */ | |
9045 | if (disr_type == nullptr) | |
9046 | return; | |
9047 | ||
9048 | /* Smash this type to be a structure type. We have to do this | |
9049 | because the type has already been recorded. */ | |
67607e24 | 9050 | type->set_code (TYPE_CODE_STRUCT); |
c9317f21 | 9051 | |
9c6a1327 | 9052 | /* Make space for the discriminant field. */ |
ceacbf6e | 9053 | struct field *disr_field = &disr_type->field (0); |
9c6a1327 | 9054 | field *new_fields |
1f704f76 | 9055 | = (struct field *) TYPE_ZALLOC (type, ((type->num_fields () + 1) |
9c6a1327 | 9056 | * sizeof (struct field))); |
80fc5e77 | 9057 | memcpy (new_fields + 1, type->fields (), |
1f704f76 | 9058 | type->num_fields () * sizeof (struct field)); |
3cabb6b0 | 9059 | type->set_fields (new_fields); |
1f704f76 | 9060 | type->set_num_fields (type->num_fields () + 1); |
c9317f21 TT |
9061 | |
9062 | /* Install the discriminant at index 0 in the union. */ | |
ceacbf6e | 9063 | type->field (0) = *disr_field; |
9c6a1327 TT |
9064 | TYPE_FIELD_ARTIFICIAL (type, 0) = 1; |
9065 | TYPE_FIELD_NAME (type, 0) = "<<discriminant>>"; | |
c9317f21 TT |
9066 | |
9067 | /* We need a way to find the correct discriminant given a | |
9068 | variant name. For convenience we build a map here. */ | |
b6cdac4b | 9069 | struct type *enum_type = disr_field->type (); |
c9317f21 | 9070 | std::unordered_map<std::string, ULONGEST> discriminant_map; |
1f704f76 | 9071 | for (int i = 0; i < enum_type->num_fields (); ++i) |
c9317f21 TT |
9072 | { |
9073 | if (TYPE_FIELD_LOC_KIND (enum_type, i) == FIELD_LOC_KIND_ENUMVAL) | |
9074 | { | |
9075 | const char *name | |
9076 | = rust_last_path_segment (TYPE_FIELD_NAME (enum_type, i)); | |
9077 | discriminant_map[name] = TYPE_FIELD_ENUMVAL (enum_type, i); | |
9078 | } | |
9079 | } | |
9080 | ||
1f704f76 | 9081 | int n_fields = type->num_fields (); |
9c6a1327 TT |
9082 | /* We don't need a range entry for the discriminant, but we do |
9083 | need one for every other field, as there is no default | |
9084 | variant. */ | |
9085 | discriminant_range *ranges = XOBNEWVEC (&objfile->objfile_obstack, | |
9086 | discriminant_range, | |
9087 | n_fields - 1); | |
c9317f21 TT |
9088 | /* Skip the discriminant here. */ |
9089 | for (int i = 1; i < n_fields; ++i) | |
9090 | { | |
9091 | /* Find the final word in the name of this variant's type. | |
9092 | That name can be used to look up the correct | |
9093 | discriminant. */ | |
9094 | const char *variant_name | |
940da03e | 9095 | = rust_last_path_segment (type->field (i).type ()->name ()); |
c9317f21 TT |
9096 | |
9097 | auto iter = discriminant_map.find (variant_name); | |
9098 | if (iter != discriminant_map.end ()) | |
9c6a1327 | 9099 | { |
57d02173 TT |
9100 | ranges[i - 1].low = iter->second; |
9101 | ranges[i - 1].high = iter->second; | |
9c6a1327 | 9102 | } |
c9317f21 | 9103 | |
57d02173 TT |
9104 | /* In Rust, each element should have the size of the |
9105 | enclosing enum. */ | |
9106 | TYPE_LENGTH (type->field (i).type ()) = TYPE_LENGTH (type); | |
9107 | ||
bedda9ac | 9108 | /* Remove the discriminant field, if it exists. */ |
940da03e | 9109 | struct type *sub_type = type->field (i).type (); |
1f704f76 | 9110 | if (sub_type->num_fields () > 0) |
bedda9ac | 9111 | { |
5e33d5f4 | 9112 | sub_type->set_num_fields (sub_type->num_fields () - 1); |
3cabb6b0 | 9113 | sub_type->set_fields (sub_type->fields () + 1); |
bedda9ac | 9114 | } |
9c6a1327 | 9115 | TYPE_FIELD_NAME (type, i) = variant_name; |
d0e39ea2 SM |
9116 | sub_type->set_name |
9117 | (rust_fully_qualify (&objfile->objfile_obstack, | |
7d93a1e0 | 9118 | type->name (), variant_name)); |
c9317f21 | 9119 | } |
9c6a1327 TT |
9120 | |
9121 | /* Indicate that this is a variant type. */ | |
a1520ad8 | 9122 | alloc_rust_variant (&objfile->objfile_obstack, type, 0, -1, |
9c6a1327 TT |
9123 | gdb::array_view<discriminant_range> (ranges, |
9124 | n_fields - 1)); | |
c9317f21 TT |
9125 | } |
9126 | } | |
9127 | ||
9128 | /* Rewrite some Rust unions to be structures with variants parts. */ | |
9129 | ||
9130 | static void | |
9131 | rust_union_quirks (struct dwarf2_cu *cu) | |
9132 | { | |
9133 | gdb_assert (cu->language == language_rust); | |
52941706 | 9134 | for (type *type_ : cu->rust_unions) |
5e22e966 | 9135 | quirk_rust_enum (type_, cu->per_objfile->objfile); |
2d79090e TT |
9136 | /* We don't need this any more. */ |
9137 | cu->rust_unions.clear (); | |
c9317f21 TT |
9138 | } |
9139 | ||
8adb8487 TT |
9140 | /* See read.h. */ |
9141 | ||
9142 | type_unit_group_unshareable * | |
9143 | dwarf2_per_objfile::get_type_unit_group_unshareable (type_unit_group *tu_group) | |
9144 | { | |
9145 | auto iter = this->m_type_units.find (tu_group); | |
9146 | if (iter != this->m_type_units.end ()) | |
9147 | return iter->second.get (); | |
9148 | ||
9149 | type_unit_group_unshareable_up uniq (new type_unit_group_unshareable); | |
9150 | type_unit_group_unshareable *result = uniq.get (); | |
9151 | this->m_type_units[tu_group] = std::move (uniq); | |
9152 | return result; | |
9153 | } | |
9154 | ||
e286671b TT |
9155 | struct type * |
9156 | dwarf2_per_objfile::get_type_for_signatured_type | |
9157 | (signatured_type *sig_type) const | |
9158 | { | |
9159 | auto iter = this->m_type_map.find (sig_type); | |
9160 | if (iter == this->m_type_map.end ()) | |
9161 | return nullptr; | |
9162 | ||
9163 | return iter->second; | |
9164 | } | |
9165 | ||
9166 | void dwarf2_per_objfile::set_type_for_signatured_type | |
9167 | (signatured_type *sig_type, struct type *type) | |
9168 | { | |
9169 | gdb_assert (this->m_type_map.find (sig_type) == this->m_type_map.end ()); | |
9170 | ||
9171 | this->m_type_map[sig_type] = type; | |
9172 | } | |
9173 | ||
95554aad TT |
9174 | /* A helper function for computing the list of all symbol tables |
9175 | included by PER_CU. */ | |
9176 | ||
9177 | static void | |
4c39bc03 | 9178 | recursively_compute_inclusions (std::vector<compunit_symtab *> *result, |
ec94af83 | 9179 | htab_t all_children, htab_t all_type_symtabs, |
43182c09 SM |
9180 | dwarf2_per_cu_data *per_cu, |
9181 | dwarf2_per_objfile *per_objfile, | |
43f3e411 | 9182 | struct compunit_symtab *immediate_parent) |
95554aad | 9183 | { |
af758d11 | 9184 | void **slot = htab_find_slot (all_children, per_cu, INSERT); |
95554aad TT |
9185 | if (*slot != NULL) |
9186 | { | |
9187 | /* This inclusion and its children have been processed. */ | |
9188 | return; | |
9189 | } | |
9190 | ||
9191 | *slot = per_cu; | |
af758d11 | 9192 | |
95554aad | 9193 | /* Only add a CU if it has a symbol table. */ |
43182c09 | 9194 | compunit_symtab *cust = per_objfile->get_symtab (per_cu); |
43f3e411 | 9195 | if (cust != NULL) |
ec94af83 DE |
9196 | { |
9197 | /* If this is a type unit only add its symbol table if we haven't | |
9198 | seen it yet (type unit per_cu's can share symtabs). */ | |
9199 | if (per_cu->is_debug_types) | |
9200 | { | |
43f3e411 | 9201 | slot = htab_find_slot (all_type_symtabs, cust, INSERT); |
ec94af83 DE |
9202 | if (*slot == NULL) |
9203 | { | |
43f3e411 | 9204 | *slot = cust; |
4c39bc03 | 9205 | result->push_back (cust); |
43f3e411 DE |
9206 | if (cust->user == NULL) |
9207 | cust->user = immediate_parent; | |
ec94af83 DE |
9208 | } |
9209 | } | |
9210 | else | |
f9125b6c | 9211 | { |
4c39bc03 | 9212 | result->push_back (cust); |
43f3e411 DE |
9213 | if (cust->user == NULL) |
9214 | cust->user = immediate_parent; | |
f9125b6c | 9215 | } |
ec94af83 | 9216 | } |
95554aad | 9217 | |
ae640021 AB |
9218 | if (!per_cu->imported_symtabs_empty ()) |
9219 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) | |
9220 | { | |
9221 | recursively_compute_inclusions (result, all_children, | |
43182c09 SM |
9222 | all_type_symtabs, ptr, per_objfile, |
9223 | cust); | |
ae640021 | 9224 | } |
95554aad TT |
9225 | } |
9226 | ||
43f3e411 | 9227 | /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of |
95554aad TT |
9228 | PER_CU. */ |
9229 | ||
9230 | static void | |
43182c09 SM |
9231 | compute_compunit_symtab_includes (dwarf2_per_cu_data *per_cu, |
9232 | dwarf2_per_objfile *per_objfile) | |
95554aad | 9233 | { |
f4dc4d17 DE |
9234 | gdb_assert (! per_cu->is_debug_types); |
9235 | ||
ae640021 | 9236 | if (!per_cu->imported_symtabs_empty ()) |
95554aad | 9237 | { |
ae640021 | 9238 | int len; |
4c39bc03 | 9239 | std::vector<compunit_symtab *> result_symtabs; |
43182c09 | 9240 | compunit_symtab *cust = per_objfile->get_symtab (per_cu); |
95554aad TT |
9241 | |
9242 | /* If we don't have a symtab, we can just skip this case. */ | |
43f3e411 | 9243 | if (cust == NULL) |
95554aad TT |
9244 | return; |
9245 | ||
280a9412 TT |
9246 | htab_up all_children (htab_create_alloc (1, htab_hash_pointer, |
9247 | htab_eq_pointer, | |
9248 | NULL, xcalloc, xfree)); | |
9249 | htab_up all_type_symtabs (htab_create_alloc (1, htab_hash_pointer, | |
9250 | htab_eq_pointer, | |
9251 | NULL, xcalloc, xfree)); | |
95554aad | 9252 | |
ae640021 | 9253 | for (dwarf2_per_cu_data *ptr : *per_cu->imported_symtabs) |
ec94af83 | 9254 | { |
280a9412 TT |
9255 | recursively_compute_inclusions (&result_symtabs, all_children.get (), |
9256 | all_type_symtabs.get (), ptr, | |
9257 | per_objfile, cust); | |
ec94af83 | 9258 | } |
95554aad | 9259 | |
ec94af83 | 9260 | /* Now we have a transitive closure of all the included symtabs. */ |
4c39bc03 | 9261 | len = result_symtabs.size (); |
43f3e411 | 9262 | cust->includes |
f6e649dd | 9263 | = XOBNEWVEC (&per_objfile->objfile->objfile_obstack, |
8d749320 | 9264 | struct compunit_symtab *, len + 1); |
4c39bc03 TT |
9265 | memcpy (cust->includes, result_symtabs.data (), |
9266 | len * sizeof (compunit_symtab *)); | |
43f3e411 | 9267 | cust->includes[len] = NULL; |
95554aad TT |
9268 | } |
9269 | } | |
9270 | ||
9271 | /* Compute the 'includes' field for the symtabs of all the CUs we just | |
9272 | read. */ | |
9273 | ||
9274 | static void | |
976ca316 | 9275 | process_cu_includes (dwarf2_per_objfile *per_objfile) |
95554aad | 9276 | { |
976ca316 | 9277 | for (dwarf2_per_cu_data *iter : per_objfile->per_bfd->just_read_cus) |
f4dc4d17 DE |
9278 | { |
9279 | if (! iter->is_debug_types) | |
976ca316 | 9280 | compute_compunit_symtab_includes (iter, per_objfile); |
f4dc4d17 | 9281 | } |
95554aad | 9282 | |
976ca316 | 9283 | per_objfile->per_bfd->just_read_cus.clear (); |
95554aad TT |
9284 | } |
9285 | ||
8fc0b21d | 9286 | /* Generate full symbol information for CU, whose DIEs have |
10b3939b DJ |
9287 | already been loaded into memory. */ |
9288 | ||
9289 | static void | |
8fc0b21d | 9290 | process_full_comp_unit (dwarf2_cu *cu, enum language pretend_language) |
10b3939b | 9291 | { |
976ca316 SM |
9292 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
9293 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 9294 | struct gdbarch *gdbarch = objfile->arch (); |
10b3939b | 9295 | CORE_ADDR lowpc, highpc; |
43f3e411 | 9296 | struct compunit_symtab *cust; |
10b3939b | 9297 | CORE_ADDR baseaddr; |
4359dff1 | 9298 | struct block *static_block; |
3e29f34a | 9299 | CORE_ADDR addr; |
10b3939b | 9300 | |
b3b3bada | 9301 | baseaddr = objfile->text_section_offset (); |
10b3939b | 9302 | |
c89b44cd TT |
9303 | /* Clear the list here in case something was left over. */ |
9304 | cu->method_list.clear (); | |
10b3939b | 9305 | |
95554aad TT |
9306 | cu->language = pretend_language; |
9307 | cu->language_defn = language_def (cu->language); | |
9308 | ||
1c47ec3e TV |
9309 | dwarf2_find_base_address (cu->dies, cu); |
9310 | ||
702cf3f5 AB |
9311 | /* Before we start reading the top-level DIE, ensure it has a valid tag |
9312 | type. */ | |
9313 | switch (cu->dies->tag) | |
9314 | { | |
9315 | case DW_TAG_compile_unit: | |
9316 | case DW_TAG_partial_unit: | |
9317 | case DW_TAG_type_unit: | |
9318 | break; | |
9319 | default: | |
9320 | error (_("Dwarf Error: unexpected tag '%s' at offset %s [in module %s]"), | |
9321 | dwarf_tag_name (cu->dies->tag), | |
9322 | sect_offset_str (cu->per_cu->sect_off), | |
9323 | objfile_name (per_objfile->objfile)); | |
9324 | } | |
9325 | ||
c906108c | 9326 | /* Do line number decoding in read_file_scope () */ |
10b3939b | 9327 | process_die (cu->dies, cu); |
c906108c | 9328 | |
a766d390 DE |
9329 | /* For now fudge the Go package. */ |
9330 | if (cu->language == language_go) | |
9331 | fixup_go_packaging (cu); | |
9332 | ||
5f48f8f3 | 9333 | /* Now that we have processed all the DIEs in the CU, all the types |
3da10d80 KS |
9334 | should be complete, and it should now be safe to compute all of the |
9335 | physnames. */ | |
9336 | compute_delayed_physnames (cu); | |
3da10d80 | 9337 | |
c9317f21 TT |
9338 | if (cu->language == language_rust) |
9339 | rust_union_quirks (cu); | |
9340 | ||
fae299cd DC |
9341 | /* Some compilers don't define a DW_AT_high_pc attribute for the |
9342 | compilation unit. If the DW_AT_high_pc is missing, synthesize | |
9343 | it, by scanning the DIE's below the compilation unit. */ | |
10b3939b | 9344 | get_scope_pc_bounds (cu->dies, &lowpc, &highpc, cu); |
c906108c | 9345 | |
3e29f34a | 9346 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); |
c24bdb02 | 9347 | static_block = cu->get_builder ()->end_symtab_get_static_block (addr, 0, 1); |
4359dff1 JK |
9348 | |
9349 | /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges. | |
9350 | Also, DW_AT_ranges may record ranges not belonging to any child DIEs | |
9351 | (such as virtual method tables). Record the ranges in STATIC_BLOCK's | |
9352 | addrmap to help ensure it has an accurate map of pc values belonging to | |
9353 | this comp unit. */ | |
9354 | dwarf2_record_block_ranges (cu->dies, static_block, baseaddr, cu); | |
9355 | ||
c24bdb02 | 9356 | cust = cu->get_builder ()->end_symtab_from_static_block (static_block, |
804d2729 TT |
9357 | SECT_OFF_TEXT (objfile), |
9358 | 0); | |
c906108c | 9359 | |
43f3e411 | 9360 | if (cust != NULL) |
c906108c | 9361 | { |
df15bd07 | 9362 | int gcc_4_minor = producer_is_gcc_ge_4 (cu->producer); |
4632c0d0 | 9363 | |
8be455d7 JK |
9364 | /* Set symtab language to language from DW_AT_language. If the |
9365 | compilation is from a C file generated by language preprocessors, do | |
9366 | not set the language if it was already deduced by start_subfile. */ | |
43f3e411 | 9367 | if (!(cu->language == language_c |
40e3ad0e | 9368 | && COMPUNIT_FILETABS (cust)->language != language_unknown)) |
43f3e411 | 9369 | COMPUNIT_FILETABS (cust)->language = cu->language; |
8be455d7 JK |
9370 | |
9371 | /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can | |
9372 | produce DW_AT_location with location lists but it can be possibly | |
ab260dad JK |
9373 | invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0 |
9374 | there were bugs in prologue debug info, fixed later in GCC-4.5 | |
9375 | by "unwind info for epilogues" patch (which is not directly related). | |
8be455d7 JK |
9376 | |
9377 | For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not | |
9378 | needed, it would be wrong due to missing DW_AT_producer there. | |
9379 | ||
9380 | Still one can confuse GDB by using non-standard GCC compilation | |
9381 | options - this waits on GCC PR other/32998 (-frecord-gcc-switches). | |
5f48f8f3 | 9382 | */ |
ab260dad | 9383 | if (cu->has_loclist && gcc_4_minor >= 5) |
43f3e411 | 9384 | cust->locations_valid = 1; |
e0d00bc7 JK |
9385 | |
9386 | if (gcc_4_minor >= 5) | |
43f3e411 | 9387 | cust->epilogue_unwind_valid = 1; |
96408a79 | 9388 | |
43f3e411 | 9389 | cust->call_site_htab = cu->call_site_htab; |
c906108c | 9390 | } |
9291a0cd | 9391 | |
976ca316 | 9392 | per_objfile->set_symtab (cu->per_cu, cust); |
c906108c | 9393 | |
95554aad | 9394 | /* Push it for inclusion processing later. */ |
976ca316 | 9395 | per_objfile->per_bfd->just_read_cus.push_back (cu->per_cu); |
804d2729 TT |
9396 | |
9397 | /* Not needed any more. */ | |
c24bdb02 | 9398 | cu->reset_builder (); |
f4dc4d17 | 9399 | } |
45cfd468 | 9400 | |
8fc0b21d | 9401 | /* Generate full symbol information for type unit CU, whose DIEs have |
f4dc4d17 DE |
9402 | already been loaded into memory. */ |
9403 | ||
9404 | static void | |
8fc0b21d | 9405 | process_full_type_unit (dwarf2_cu *cu, |
f4dc4d17 DE |
9406 | enum language pretend_language) |
9407 | { | |
976ca316 SM |
9408 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
9409 | struct objfile *objfile = per_objfile->objfile; | |
43f3e411 | 9410 | struct compunit_symtab *cust; |
0186c6a7 DE |
9411 | struct signatured_type *sig_type; |
9412 | ||
8fc0b21d SM |
9413 | gdb_assert (cu->per_cu->is_debug_types); |
9414 | sig_type = (struct signatured_type *) cu->per_cu; | |
f4dc4d17 | 9415 | |
c89b44cd TT |
9416 | /* Clear the list here in case something was left over. */ |
9417 | cu->method_list.clear (); | |
f4dc4d17 | 9418 | |
f4dc4d17 DE |
9419 | cu->language = pretend_language; |
9420 | cu->language_defn = language_def (cu->language); | |
9421 | ||
9422 | /* The symbol tables are set up in read_type_unit_scope. */ | |
9423 | process_die (cu->dies, cu); | |
9424 | ||
9425 | /* For now fudge the Go package. */ | |
9426 | if (cu->language == language_go) | |
9427 | fixup_go_packaging (cu); | |
9428 | ||
5f48f8f3 | 9429 | /* Now that we have processed all the DIEs in the CU, all the types |
f4dc4d17 DE |
9430 | should be complete, and it should now be safe to compute all of the |
9431 | physnames. */ | |
9432 | compute_delayed_physnames (cu); | |
f4dc4d17 | 9433 | |
c9317f21 TT |
9434 | if (cu->language == language_rust) |
9435 | rust_union_quirks (cu); | |
9436 | ||
f4dc4d17 DE |
9437 | /* TUs share symbol tables. |
9438 | If this is the first TU to use this symtab, complete the construction | |
094b34ac DE |
9439 | of it with end_expandable_symtab. Otherwise, complete the addition of |
9440 | this TU's symbols to the existing symtab. */ | |
8adb8487 | 9441 | type_unit_group_unshareable *tug_unshare = |
976ca316 | 9442 | per_objfile->get_type_unit_group_unshareable (sig_type->type_unit_group); |
8adb8487 | 9443 | if (tug_unshare->compunit_symtab == NULL) |
45cfd468 | 9444 | { |
c24bdb02 KS |
9445 | buildsym_compunit *builder = cu->get_builder (); |
9446 | cust = builder->end_expandable_symtab (0, SECT_OFF_TEXT (objfile)); | |
8adb8487 | 9447 | tug_unshare->compunit_symtab = cust; |
f4dc4d17 | 9448 | |
43f3e411 | 9449 | if (cust != NULL) |
f4dc4d17 DE |
9450 | { |
9451 | /* Set symtab language to language from DW_AT_language. If the | |
9452 | compilation is from a C file generated by language preprocessors, | |
9453 | do not set the language if it was already deduced by | |
9454 | start_subfile. */ | |
43f3e411 DE |
9455 | if (!(cu->language == language_c |
9456 | && COMPUNIT_FILETABS (cust)->language != language_c)) | |
9457 | COMPUNIT_FILETABS (cust)->language = cu->language; | |
f4dc4d17 DE |
9458 | } |
9459 | } | |
9460 | else | |
9461 | { | |
c24bdb02 | 9462 | cu->get_builder ()->augment_type_symtab (); |
8adb8487 | 9463 | cust = tug_unshare->compunit_symtab; |
f4dc4d17 DE |
9464 | } |
9465 | ||
976ca316 | 9466 | per_objfile->set_symtab (cu->per_cu, cust); |
804d2729 TT |
9467 | |
9468 | /* Not needed any more. */ | |
c24bdb02 | 9469 | cu->reset_builder (); |
c906108c SS |
9470 | } |
9471 | ||
95554aad TT |
9472 | /* Process an imported unit DIE. */ |
9473 | ||
9474 | static void | |
9475 | process_imported_unit_die (struct die_info *die, struct dwarf2_cu *cu) | |
9476 | { | |
9477 | struct attribute *attr; | |
9478 | ||
f4dc4d17 DE |
9479 | /* For now we don't handle imported units in type units. */ |
9480 | if (cu->per_cu->is_debug_types) | |
9481 | { | |
9482 | error (_("Dwarf Error: DW_TAG_imported_unit is not" | |
9483 | " supported in type units [in module %s]"), | |
5e22e966 | 9484 | objfile_name (cu->per_objfile->objfile)); |
f4dc4d17 DE |
9485 | } |
9486 | ||
95554aad TT |
9487 | attr = dwarf2_attr (die, DW_AT_import, cu); |
9488 | if (attr != NULL) | |
9489 | { | |
0826b30a | 9490 | sect_offset sect_off = attr->get_ref_die_offset (); |
9c541725 | 9491 | bool is_dwz = (attr->form == DW_FORM_GNU_ref_alt || cu->per_cu->is_dwz); |
ab432490 | 9492 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
9c541725 | 9493 | dwarf2_per_cu_data *per_cu |
ab432490 | 9494 | = dwarf2_find_containing_comp_unit (sect_off, is_dwz, per_objfile); |
95554aad | 9495 | |
58990295 TV |
9496 | /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit |
9497 | into another compilation unit, at root level. Regard this as a hint, | |
9498 | and ignore it. */ | |
9499 | if (die->parent && die->parent->parent == NULL | |
9500 | && per_cu->unit_type == DW_UT_compile | |
9501 | && per_cu->lang == language_cplus) | |
9502 | return; | |
9503 | ||
69d751e3 | 9504 | /* If necessary, add it to the queue and load its DIEs. */ |
120ce1b5 | 9505 | if (maybe_queue_comp_unit (cu, per_cu, per_objfile, cu->language)) |
4a636814 SM |
9506 | load_full_comp_unit (per_cu, per_objfile, per_objfile->get_cu (per_cu), |
9507 | false, cu->language); | |
95554aad | 9508 | |
ae640021 | 9509 | cu->per_cu->imported_symtabs_push (per_cu); |
95554aad TT |
9510 | } |
9511 | } | |
9512 | ||
4c8aa72d PA |
9513 | /* RAII object that represents a process_die scope: i.e., |
9514 | starts/finishes processing a DIE. */ | |
9515 | class process_die_scope | |
adde2bff | 9516 | { |
4c8aa72d PA |
9517 | public: |
9518 | process_die_scope (die_info *die, dwarf2_cu *cu) | |
9519 | : m_die (die), m_cu (cu) | |
9520 | { | |
9521 | /* We should only be processing DIEs not already in process. */ | |
9522 | gdb_assert (!m_die->in_process); | |
9523 | m_die->in_process = true; | |
9524 | } | |
8c3cb9fa | 9525 | |
4c8aa72d PA |
9526 | ~process_die_scope () |
9527 | { | |
9528 | m_die->in_process = false; | |
9529 | ||
9530 | /* If we're done processing the DIE for the CU that owns the line | |
9531 | header, we don't need the line header anymore. */ | |
9532 | if (m_cu->line_header_die_owner == m_die) | |
9533 | { | |
9534 | delete m_cu->line_header; | |
9535 | m_cu->line_header = NULL; | |
9536 | m_cu->line_header_die_owner = NULL; | |
9537 | } | |
9538 | } | |
9539 | ||
9540 | private: | |
9541 | die_info *m_die; | |
9542 | dwarf2_cu *m_cu; | |
9543 | }; | |
adde2bff | 9544 | |
c906108c SS |
9545 | /* Process a die and its children. */ |
9546 | ||
9547 | static void | |
e7c27a73 | 9548 | process_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 9549 | { |
4c8aa72d | 9550 | process_die_scope scope (die, cu); |
adde2bff | 9551 | |
c906108c SS |
9552 | switch (die->tag) |
9553 | { | |
9554 | case DW_TAG_padding: | |
9555 | break; | |
9556 | case DW_TAG_compile_unit: | |
95554aad | 9557 | case DW_TAG_partial_unit: |
e7c27a73 | 9558 | read_file_scope (die, cu); |
c906108c | 9559 | break; |
348e048f DE |
9560 | case DW_TAG_type_unit: |
9561 | read_type_unit_scope (die, cu); | |
9562 | break; | |
c906108c | 9563 | case DW_TAG_subprogram: |
0a4b0913 AB |
9564 | /* Nested subprograms in Fortran get a prefix. */ |
9565 | if (cu->language == language_fortran | |
9566 | && die->parent != NULL | |
9567 | && die->parent->tag == DW_TAG_subprogram) | |
9568 | cu->processing_has_namespace_info = true; | |
9569 | /* Fall through. */ | |
c906108c | 9570 | case DW_TAG_inlined_subroutine: |
edb3359d | 9571 | read_func_scope (die, cu); |
c906108c SS |
9572 | break; |
9573 | case DW_TAG_lexical_block: | |
14898363 L |
9574 | case DW_TAG_try_block: |
9575 | case DW_TAG_catch_block: | |
e7c27a73 | 9576 | read_lexical_block_scope (die, cu); |
c906108c | 9577 | break; |
216f72a1 | 9578 | case DW_TAG_call_site: |
96408a79 SA |
9579 | case DW_TAG_GNU_call_site: |
9580 | read_call_site_scope (die, cu); | |
9581 | break; | |
c906108c | 9582 | case DW_TAG_class_type: |
680b30c7 | 9583 | case DW_TAG_interface_type: |
c906108c SS |
9584 | case DW_TAG_structure_type: |
9585 | case DW_TAG_union_type: | |
134d01f1 | 9586 | process_structure_scope (die, cu); |
c906108c SS |
9587 | break; |
9588 | case DW_TAG_enumeration_type: | |
134d01f1 | 9589 | process_enumeration_scope (die, cu); |
c906108c | 9590 | break; |
134d01f1 | 9591 | |
f792889a DJ |
9592 | /* These dies have a type, but processing them does not create |
9593 | a symbol or recurse to process the children. Therefore we can | |
9594 | read them on-demand through read_type_die. */ | |
c906108c | 9595 | case DW_TAG_subroutine_type: |
72019c9c | 9596 | case DW_TAG_set_type: |
c906108c | 9597 | case DW_TAG_pointer_type: |
c906108c | 9598 | case DW_TAG_ptr_to_member_type: |
c906108c | 9599 | case DW_TAG_reference_type: |
4297a3f0 | 9600 | case DW_TAG_rvalue_reference_type: |
c906108c | 9601 | case DW_TAG_string_type: |
c906108c | 9602 | break; |
134d01f1 | 9603 | |
d8f62e84 TT |
9604 | case DW_TAG_array_type: |
9605 | /* We only need to handle this case for Ada -- in other | |
9606 | languages, it's normal for the compiler to emit a typedef | |
9607 | instead. */ | |
9608 | if (cu->language != language_ada) | |
9609 | break; | |
9610 | /* FALLTHROUGH */ | |
c906108c | 9611 | case DW_TAG_base_type: |
a02abb62 | 9612 | case DW_TAG_subrange_type: |
cb249c71 | 9613 | case DW_TAG_typedef: |
134d01f1 | 9614 | /* Add a typedef symbol for the type definition, if it has a |
dda83cd7 | 9615 | DW_AT_name. */ |
f792889a | 9616 | new_symbol (die, read_type_die (die, cu), cu); |
a02abb62 | 9617 | break; |
c906108c | 9618 | case DW_TAG_common_block: |
e7c27a73 | 9619 | read_common_block (die, cu); |
c906108c SS |
9620 | break; |
9621 | case DW_TAG_common_inclusion: | |
9622 | break; | |
d9fa45fe | 9623 | case DW_TAG_namespace: |
9068261f | 9624 | cu->processing_has_namespace_info = true; |
e7c27a73 | 9625 | read_namespace (die, cu); |
d9fa45fe | 9626 | break; |
5d7cb8df | 9627 | case DW_TAG_module: |
9068261f | 9628 | cu->processing_has_namespace_info = true; |
5d7cb8df JK |
9629 | read_module (die, cu); |
9630 | break; | |
d9fa45fe | 9631 | case DW_TAG_imported_declaration: |
9068261f | 9632 | cu->processing_has_namespace_info = true; |
74921315 KS |
9633 | if (read_namespace_alias (die, cu)) |
9634 | break; | |
86a73007 TT |
9635 | /* The declaration is not a global namespace alias. */ |
9636 | /* Fall through. */ | |
d9fa45fe | 9637 | case DW_TAG_imported_module: |
9068261f | 9638 | cu->processing_has_namespace_info = true; |
27aa8d6a SW |
9639 | if (die->child != NULL && (die->tag == DW_TAG_imported_declaration |
9640 | || cu->language != language_fortran)) | |
b98664d3 | 9641 | complaint (_("Tag '%s' has unexpected children"), |
27aa8d6a SW |
9642 | dwarf_tag_name (die->tag)); |
9643 | read_import_statement (die, cu); | |
d9fa45fe | 9644 | break; |
95554aad TT |
9645 | |
9646 | case DW_TAG_imported_unit: | |
9647 | process_imported_unit_die (die, cu); | |
9648 | break; | |
9649 | ||
71a3c369 TT |
9650 | case DW_TAG_variable: |
9651 | read_variable (die, cu); | |
9652 | break; | |
9653 | ||
c906108c | 9654 | default: |
e7c27a73 | 9655 | new_symbol (die, NULL, cu); |
c906108c SS |
9656 | break; |
9657 | } | |
9658 | } | |
ca69b9e6 DE |
9659 | \f |
9660 | /* DWARF name computation. */ | |
c906108c | 9661 | |
94af9270 KS |
9662 | /* A helper function for dwarf2_compute_name which determines whether DIE |
9663 | needs to have the name of the scope prepended to the name listed in the | |
9664 | die. */ | |
9665 | ||
9666 | static int | |
9667 | die_needs_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
9668 | { | |
1c809c68 TT |
9669 | struct attribute *attr; |
9670 | ||
94af9270 KS |
9671 | switch (die->tag) |
9672 | { | |
9673 | case DW_TAG_namespace: | |
9674 | case DW_TAG_typedef: | |
9675 | case DW_TAG_class_type: | |
9676 | case DW_TAG_interface_type: | |
9677 | case DW_TAG_structure_type: | |
9678 | case DW_TAG_union_type: | |
9679 | case DW_TAG_enumeration_type: | |
9680 | case DW_TAG_enumerator: | |
9681 | case DW_TAG_subprogram: | |
08a76f8a | 9682 | case DW_TAG_inlined_subroutine: |
94af9270 | 9683 | case DW_TAG_member: |
74921315 | 9684 | case DW_TAG_imported_declaration: |
94af9270 KS |
9685 | return 1; |
9686 | ||
9687 | case DW_TAG_variable: | |
c2b0a229 | 9688 | case DW_TAG_constant: |
94af9270 KS |
9689 | /* We only need to prefix "globally" visible variables. These include |
9690 | any variable marked with DW_AT_external or any variable that | |
9691 | lives in a namespace. [Variables in anonymous namespaces | |
9692 | require prefixing, but they are not DW_AT_external.] */ | |
9693 | ||
9694 | if (dwarf2_attr (die, DW_AT_specification, cu)) | |
9695 | { | |
9696 | struct dwarf2_cu *spec_cu = cu; | |
9a619af0 | 9697 | |
94af9270 KS |
9698 | return die_needs_namespace (die_specification (die, &spec_cu), |
9699 | spec_cu); | |
9700 | } | |
9701 | ||
1c809c68 | 9702 | attr = dwarf2_attr (die, DW_AT_external, cu); |
f55ee35c JK |
9703 | if (attr == NULL && die->parent->tag != DW_TAG_namespace |
9704 | && die->parent->tag != DW_TAG_module) | |
1c809c68 TT |
9705 | return 0; |
9706 | /* A variable in a lexical block of some kind does not need a | |
9707 | namespace, even though in C++ such variables may be external | |
9708 | and have a mangled name. */ | |
9709 | if (die->parent->tag == DW_TAG_lexical_block | |
9710 | || die->parent->tag == DW_TAG_try_block | |
1054b214 TT |
9711 | || die->parent->tag == DW_TAG_catch_block |
9712 | || die->parent->tag == DW_TAG_subprogram) | |
1c809c68 TT |
9713 | return 0; |
9714 | return 1; | |
94af9270 KS |
9715 | |
9716 | default: | |
9717 | return 0; | |
9718 | } | |
9719 | } | |
9720 | ||
73b9be8b KS |
9721 | /* Return the DIE's linkage name attribute, either DW_AT_linkage_name |
9722 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9723 | defined for the given DIE. */ | |
9724 | ||
9725 | static struct attribute * | |
9726 | dw2_linkage_name_attr (struct die_info *die, struct dwarf2_cu *cu) | |
9727 | { | |
9728 | struct attribute *attr; | |
9729 | ||
9730 | attr = dwarf2_attr (die, DW_AT_linkage_name, cu); | |
9731 | if (attr == NULL) | |
9732 | attr = dwarf2_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9733 | ||
9734 | return attr; | |
9735 | } | |
9736 | ||
9737 | /* Return the DIE's linkage name as a string, either DW_AT_linkage_name | |
9738 | or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not | |
9739 | defined for the given DIE. */ | |
9740 | ||
9741 | static const char * | |
9742 | dw2_linkage_name (struct die_info *die, struct dwarf2_cu *cu) | |
9743 | { | |
9744 | const char *linkage_name; | |
9745 | ||
9746 | linkage_name = dwarf2_string_attr (die, DW_AT_linkage_name, cu); | |
9747 | if (linkage_name == NULL) | |
9748 | linkage_name = dwarf2_string_attr (die, DW_AT_MIPS_linkage_name, cu); | |
9749 | ||
787de330 TT |
9750 | /* rustc emits invalid values for DW_AT_linkage_name. Ignore these. |
9751 | See https://github.com/rust-lang/rust/issues/32925. */ | |
9752 | if (cu->language == language_rust && linkage_name != NULL | |
9753 | && strchr (linkage_name, '{') != NULL) | |
9754 | linkage_name = NULL; | |
9755 | ||
73b9be8b KS |
9756 | return linkage_name; |
9757 | } | |
9758 | ||
94af9270 | 9759 | /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero, |
a766d390 | 9760 | compute the physname for the object, which include a method's: |
9c37b5ae | 9761 | - formal parameters (C++), |
a766d390 | 9762 | - receiver type (Go), |
a766d390 DE |
9763 | |
9764 | The term "physname" is a bit confusing. | |
9765 | For C++, for example, it is the demangled name. | |
9766 | For Go, for example, it's the mangled name. | |
94af9270 | 9767 | |
af6b7be1 JB |
9768 | For Ada, return the DIE's linkage name rather than the fully qualified |
9769 | name. PHYSNAME is ignored.. | |
9770 | ||
5989a64e | 9771 | The result is allocated on the objfile->per_bfd's obstack and |
45940949 | 9772 | canonicalized. */ |
94af9270 KS |
9773 | |
9774 | static const char * | |
15d034d0 TT |
9775 | dwarf2_compute_name (const char *name, |
9776 | struct die_info *die, struct dwarf2_cu *cu, | |
94af9270 KS |
9777 | int physname) |
9778 | { | |
5e22e966 | 9779 | struct objfile *objfile = cu->per_objfile->objfile; |
bb5ed363 | 9780 | |
94af9270 KS |
9781 | if (name == NULL) |
9782 | name = dwarf2_name (die, cu); | |
9783 | ||
2ee7123e DE |
9784 | /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present |
9785 | but otherwise compute it by typename_concat inside GDB. | |
9786 | FIXME: Actually this is not really true, or at least not always true. | |
4d4eaa30 | 9787 | It's all very confusing. compute_and_set_names doesn't try to demangle |
5e2db402 | 9788 | Fortran names because there is no mangling standard. So new_symbol |
2ee7123e DE |
9789 | will set the demangled name to the result of dwarf2_full_name, and it is |
9790 | the demangled name that GDB uses if it exists. */ | |
f55ee35c JK |
9791 | if (cu->language == language_ada |
9792 | || (cu->language == language_fortran && physname)) | |
9793 | { | |
9794 | /* For Ada unit, we prefer the linkage name over the name, as | |
9795 | the former contains the exported name, which the user expects | |
9796 | to be able to reference. Ideally, we want the user to be able | |
9797 | to reference this entity using either natural or linkage name, | |
9798 | but we haven't started looking at this enhancement yet. */ | |
73b9be8b | 9799 | const char *linkage_name = dw2_linkage_name (die, cu); |
f55ee35c | 9800 | |
2ee7123e DE |
9801 | if (linkage_name != NULL) |
9802 | return linkage_name; | |
f55ee35c JK |
9803 | } |
9804 | ||
94af9270 KS |
9805 | /* These are the only languages we know how to qualify names in. */ |
9806 | if (name != NULL | |
9c37b5ae | 9807 | && (cu->language == language_cplus |
c44af4eb TT |
9808 | || cu->language == language_fortran || cu->language == language_d |
9809 | || cu->language == language_rust)) | |
94af9270 KS |
9810 | { |
9811 | if (die_needs_namespace (die, cu)) | |
9812 | { | |
0d5cff50 | 9813 | const char *prefix; |
34a68019 | 9814 | const char *canonical_name = NULL; |
94af9270 | 9815 | |
d7e74731 PA |
9816 | string_file buf; |
9817 | ||
94af9270 | 9818 | prefix = determine_prefix (die, cu); |
94af9270 KS |
9819 | if (*prefix != '\0') |
9820 | { | |
43816ebc TT |
9821 | gdb::unique_xmalloc_ptr<char> prefixed_name |
9822 | (typename_concat (NULL, prefix, name, physname, cu)); | |
9a619af0 | 9823 | |
43816ebc | 9824 | buf.puts (prefixed_name.get ()); |
94af9270 KS |
9825 | } |
9826 | else | |
d7e74731 | 9827 | buf.puts (name); |
94af9270 | 9828 | |
98bfdba5 PA |
9829 | /* Template parameters may be specified in the DIE's DW_AT_name, or |
9830 | as children with DW_TAG_template_type_param or | |
9831 | DW_TAG_value_type_param. If the latter, add them to the name | |
9832 | here. If the name already has template parameters, then | |
9833 | skip this step; some versions of GCC emit both, and | |
9834 | it is more efficient to use the pre-computed name. | |
9835 | ||
9836 | Something to keep in mind about this process: it is very | |
9837 | unlikely, or in some cases downright impossible, to produce | |
9838 | something that will match the mangled name of a function. | |
9839 | If the definition of the function has the same debug info, | |
9840 | we should be able to match up with it anyway. But fallbacks | |
9841 | using the minimal symbol, for instance to find a method | |
9842 | implemented in a stripped copy of libstdc++, will not work. | |
9843 | If we do not have debug info for the definition, we will have to | |
9844 | match them up some other way. | |
9845 | ||
9846 | When we do name matching there is a related problem with function | |
9847 | templates; two instantiated function templates are allowed to | |
9848 | differ only by their return types, which we do not add here. */ | |
9849 | ||
9850 | if (cu->language == language_cplus && strchr (name, '<') == NULL) | |
9851 | { | |
9852 | struct attribute *attr; | |
9853 | struct die_info *child; | |
9854 | int first = 1; | |
2c75ccb2 | 9855 | const language_defn *cplus_lang = language_def (cu->language); |
98bfdba5 PA |
9856 | |
9857 | die->building_fullname = 1; | |
9858 | ||
9859 | for (child = die->child; child != NULL; child = child->sibling) | |
9860 | { | |
9861 | struct type *type; | |
12df843f | 9862 | LONGEST value; |
d521ce57 | 9863 | const gdb_byte *bytes; |
98bfdba5 PA |
9864 | struct dwarf2_locexpr_baton *baton; |
9865 | struct value *v; | |
9866 | ||
9867 | if (child->tag != DW_TAG_template_type_param | |
9868 | && child->tag != DW_TAG_template_value_param) | |
9869 | continue; | |
9870 | ||
9871 | if (first) | |
9872 | { | |
d7e74731 | 9873 | buf.puts ("<"); |
98bfdba5 PA |
9874 | first = 0; |
9875 | } | |
9876 | else | |
d7e74731 | 9877 | buf.puts (", "); |
98bfdba5 PA |
9878 | |
9879 | attr = dwarf2_attr (child, DW_AT_type, cu); | |
9880 | if (attr == NULL) | |
9881 | { | |
b98664d3 | 9882 | complaint (_("template parameter missing DW_AT_type")); |
d7e74731 | 9883 | buf.puts ("UNKNOWN_TYPE"); |
98bfdba5 PA |
9884 | continue; |
9885 | } | |
9886 | type = die_type (child, cu); | |
9887 | ||
9888 | if (child->tag == DW_TAG_template_type_param) | |
9889 | { | |
2c75ccb2 AB |
9890 | cplus_lang->print_type (type, "", &buf, -1, 0, |
9891 | &type_print_raw_options); | |
98bfdba5 PA |
9892 | continue; |
9893 | } | |
9894 | ||
9895 | attr = dwarf2_attr (child, DW_AT_const_value, cu); | |
9896 | if (attr == NULL) | |
9897 | { | |
b98664d3 | 9898 | complaint (_("template parameter missing " |
3e43a32a | 9899 | "DW_AT_const_value")); |
d7e74731 | 9900 | buf.puts ("UNKNOWN_VALUE"); |
98bfdba5 PA |
9901 | continue; |
9902 | } | |
9903 | ||
9904 | dwarf2_const_value_attr (attr, type, name, | |
9905 | &cu->comp_unit_obstack, cu, | |
9906 | &value, &bytes, &baton); | |
9907 | ||
20ce4123 | 9908 | if (type->has_no_signedness ()) |
98bfdba5 PA |
9909 | /* GDB prints characters as NUMBER 'CHAR'. If that's |
9910 | changed, this can use value_print instead. */ | |
2c75ccb2 | 9911 | cplus_lang->printchar (value, type, &buf); |
98bfdba5 PA |
9912 | else |
9913 | { | |
9914 | struct value_print_options opts; | |
9915 | ||
9916 | if (baton != NULL) | |
9917 | v = dwarf2_evaluate_loc_desc (type, NULL, | |
9918 | baton->data, | |
9919 | baton->size, | |
9f47c707 SM |
9920 | baton->per_cu, |
9921 | baton->per_objfile); | |
98bfdba5 PA |
9922 | else if (bytes != NULL) |
9923 | { | |
9924 | v = allocate_value (type); | |
9925 | memcpy (value_contents_writeable (v), bytes, | |
9926 | TYPE_LENGTH (type)); | |
9927 | } | |
9928 | else | |
9929 | v = value_from_longest (type, value); | |
9930 | ||
3e43a32a MS |
9931 | /* Specify decimal so that we do not depend on |
9932 | the radix. */ | |
98bfdba5 PA |
9933 | get_formatted_print_options (&opts, 'd'); |
9934 | opts.raw = 1; | |
d7e74731 | 9935 | value_print (v, &buf, &opts); |
98bfdba5 | 9936 | release_value (v); |
98bfdba5 PA |
9937 | } |
9938 | } | |
9939 | ||
9940 | die->building_fullname = 0; | |
9941 | ||
9942 | if (!first) | |
9943 | { | |
9944 | /* Close the argument list, with a space if necessary | |
9945 | (nested templates). */ | |
d7e74731 PA |
9946 | if (!buf.empty () && buf.string ().back () == '>') |
9947 | buf.puts (" >"); | |
98bfdba5 | 9948 | else |
d7e74731 | 9949 | buf.puts (">"); |
98bfdba5 PA |
9950 | } |
9951 | } | |
9952 | ||
9c37b5ae | 9953 | /* For C++ methods, append formal parameter type |
94af9270 | 9954 | information, if PHYSNAME. */ |
6e70227d | 9955 | |
94af9270 | 9956 | if (physname && die->tag == DW_TAG_subprogram |
9c37b5ae | 9957 | && cu->language == language_cplus) |
94af9270 KS |
9958 | { |
9959 | struct type *type = read_type_die (die, cu); | |
9960 | ||
d7e74731 | 9961 | c_type_print_args (type, &buf, 1, cu->language, |
79d43c61 | 9962 | &type_print_raw_options); |
94af9270 | 9963 | |
9c37b5ae | 9964 | if (cu->language == language_cplus) |
94af9270 | 9965 | { |
60430eff DJ |
9966 | /* Assume that an artificial first parameter is |
9967 | "this", but do not crash if it is not. RealView | |
9968 | marks unnamed (and thus unused) parameters as | |
9969 | artificial; there is no way to differentiate | |
9970 | the two cases. */ | |
1f704f76 | 9971 | if (type->num_fields () > 0 |
94af9270 | 9972 | && TYPE_FIELD_ARTIFICIAL (type, 0) |
940da03e SM |
9973 | && type->field (0).type ()->code () == TYPE_CODE_PTR |
9974 | && TYPE_CONST (TYPE_TARGET_TYPE (type->field (0).type ()))) | |
d7e74731 | 9975 | buf.puts (" const"); |
94af9270 KS |
9976 | } |
9977 | } | |
9978 | ||
d7e74731 | 9979 | const std::string &intermediate_name = buf.string (); |
94af9270 KS |
9980 | |
9981 | if (cu->language == language_cplus) | |
34a68019 | 9982 | canonical_name |
322a8516 | 9983 | = dwarf2_canonicalize_name (intermediate_name.c_str (), cu, |
be1e3d3e | 9984 | objfile); |
34a68019 TT |
9985 | |
9986 | /* If we only computed INTERMEDIATE_NAME, or if | |
9987 | INTERMEDIATE_NAME is already canonical, then we need to | |
be1e3d3e | 9988 | intern it. */ |
322a8516 | 9989 | if (canonical_name == NULL || canonical_name == intermediate_name.c_str ()) |
be1e3d3e | 9990 | name = objfile->intern (intermediate_name); |
34a68019 TT |
9991 | else |
9992 | name = canonical_name; | |
94af9270 KS |
9993 | } |
9994 | } | |
9995 | ||
9996 | return name; | |
9997 | } | |
9998 | ||
0114d602 DJ |
9999 | /* Return the fully qualified name of DIE, based on its DW_AT_name. |
10000 | If scope qualifiers are appropriate they will be added. The result | |
34a68019 | 10001 | will be allocated on the storage_obstack, or NULL if the DIE does |
94af9270 KS |
10002 | not have a name. NAME may either be from a previous call to |
10003 | dwarf2_name or NULL. | |
10004 | ||
9c37b5ae | 10005 | The output string will be canonicalized (if C++). */ |
0114d602 DJ |
10006 | |
10007 | static const char * | |
15d034d0 | 10008 | dwarf2_full_name (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
0114d602 | 10009 | { |
94af9270 KS |
10010 | return dwarf2_compute_name (name, die, cu, 0); |
10011 | } | |
0114d602 | 10012 | |
94af9270 KS |
10013 | /* Construct a physname for the given DIE in CU. NAME may either be |
10014 | from a previous call to dwarf2_name or NULL. The result will be | |
10015 | allocated on the objfile_objstack or NULL if the DIE does not have a | |
10016 | name. | |
0114d602 | 10017 | |
9c37b5ae | 10018 | The output string will be canonicalized (if C++). */ |
0114d602 | 10019 | |
94af9270 | 10020 | static const char * |
15d034d0 | 10021 | dwarf2_physname (const char *name, struct die_info *die, struct dwarf2_cu *cu) |
94af9270 | 10022 | { |
5e22e966 | 10023 | struct objfile *objfile = cu->per_objfile->objfile; |
900e11f9 | 10024 | const char *retval, *mangled = NULL, *canon = NULL; |
900e11f9 JK |
10025 | int need_copy = 1; |
10026 | ||
10027 | /* In this case dwarf2_compute_name is just a shortcut not building anything | |
10028 | on its own. */ | |
10029 | if (!die_needs_namespace (die, cu)) | |
10030 | return dwarf2_compute_name (name, die, cu, 1); | |
10031 | ||
906bb4c5 TT |
10032 | if (cu->language != language_rust) |
10033 | mangled = dw2_linkage_name (die, cu); | |
900e11f9 JK |
10034 | |
10035 | /* DW_AT_linkage_name is missing in some cases - depend on what GDB | |
10036 | has computed. */ | |
791afaa2 | 10037 | gdb::unique_xmalloc_ptr<char> demangled; |
7d45c7c3 | 10038 | if (mangled != NULL) |
900e11f9 | 10039 | { |
900e11f9 | 10040 | |
d3355e4d | 10041 | if (language_def (cu->language)->store_sym_names_in_linkage_form_p ()) |
59cc4834 JB |
10042 | { |
10043 | /* Do nothing (do not demangle the symbol name). */ | |
10044 | } | |
a766d390 DE |
10045 | else |
10046 | { | |
0eb876f5 JB |
10047 | /* Use DMGL_RET_DROP for C++ template functions to suppress |
10048 | their return type. It is easier for GDB users to search | |
10049 | for such functions as `name(params)' than `long name(params)'. | |
10050 | In such case the minimal symbol names do not match the full | |
10051 | symbol names but for template functions there is never a need | |
10052 | to look up their definition from their declaration so | |
10053 | the only disadvantage remains the minimal symbol variant | |
10054 | `long name(params)' does not have the proper inferior type. */ | |
791afaa2 TT |
10055 | demangled.reset (gdb_demangle (mangled, |
10056 | (DMGL_PARAMS | DMGL_ANSI | |
10057 | | DMGL_RET_DROP))); | |
a766d390 | 10058 | } |
900e11f9 | 10059 | if (demangled) |
791afaa2 | 10060 | canon = demangled.get (); |
900e11f9 JK |
10061 | else |
10062 | { | |
10063 | canon = mangled; | |
10064 | need_copy = 0; | |
10065 | } | |
10066 | } | |
10067 | ||
10068 | if (canon == NULL || check_physname) | |
10069 | { | |
10070 | const char *physname = dwarf2_compute_name (name, die, cu, 1); | |
10071 | ||
10072 | if (canon != NULL && strcmp (physname, canon) != 0) | |
10073 | { | |
10074 | /* It may not mean a bug in GDB. The compiler could also | |
10075 | compute DW_AT_linkage_name incorrectly. But in such case | |
10076 | GDB would need to be bug-to-bug compatible. */ | |
10077 | ||
b98664d3 | 10078 | complaint (_("Computed physname <%s> does not match demangled <%s> " |
9d8780f0 SM |
10079 | "(from linkage <%s>) - DIE at %s [in module %s]"), |
10080 | physname, canon, mangled, sect_offset_str (die->sect_off), | |
4262abfb | 10081 | objfile_name (objfile)); |
900e11f9 JK |
10082 | |
10083 | /* Prefer DW_AT_linkage_name (in the CANON form) - when it | |
10084 | is available here - over computed PHYSNAME. It is safer | |
10085 | against both buggy GDB and buggy compilers. */ | |
10086 | ||
10087 | retval = canon; | |
10088 | } | |
10089 | else | |
10090 | { | |
10091 | retval = physname; | |
10092 | need_copy = 0; | |
10093 | } | |
10094 | } | |
10095 | else | |
10096 | retval = canon; | |
10097 | ||
10098 | if (need_copy) | |
be1e3d3e | 10099 | retval = objfile->intern (retval); |
900e11f9 | 10100 | |
900e11f9 | 10101 | return retval; |
0114d602 DJ |
10102 | } |
10103 | ||
74921315 KS |
10104 | /* Inspect DIE in CU for a namespace alias. If one exists, record |
10105 | a new symbol for it. | |
10106 | ||
10107 | Returns 1 if a namespace alias was recorded, 0 otherwise. */ | |
10108 | ||
10109 | static int | |
10110 | read_namespace_alias (struct die_info *die, struct dwarf2_cu *cu) | |
10111 | { | |
10112 | struct attribute *attr; | |
10113 | ||
10114 | /* If the die does not have a name, this is not a namespace | |
10115 | alias. */ | |
10116 | attr = dwarf2_attr (die, DW_AT_name, cu); | |
10117 | if (attr != NULL) | |
10118 | { | |
10119 | int num; | |
10120 | struct die_info *d = die; | |
10121 | struct dwarf2_cu *imported_cu = cu; | |
10122 | ||
10123 | /* If the compiler has nested DW_AT_imported_declaration DIEs, | |
10124 | keep inspecting DIEs until we hit the underlying import. */ | |
10125 | #define MAX_NESTED_IMPORTED_DECLARATIONS 100 | |
10126 | for (num = 0; num < MAX_NESTED_IMPORTED_DECLARATIONS; ++num) | |
10127 | { | |
10128 | attr = dwarf2_attr (d, DW_AT_import, cu); | |
10129 | if (attr == NULL) | |
10130 | break; | |
10131 | ||
10132 | d = follow_die_ref (d, attr, &imported_cu); | |
10133 | if (d->tag != DW_TAG_imported_declaration) | |
10134 | break; | |
10135 | } | |
10136 | ||
10137 | if (num == MAX_NESTED_IMPORTED_DECLARATIONS) | |
10138 | { | |
b98664d3 | 10139 | complaint (_("DIE at %s has too many recursively imported " |
9d8780f0 | 10140 | "declarations"), sect_offset_str (d->sect_off)); |
74921315 KS |
10141 | return 0; |
10142 | } | |
10143 | ||
10144 | if (attr != NULL) | |
10145 | { | |
10146 | struct type *type; | |
0826b30a | 10147 | sect_offset sect_off = attr->get_ref_die_offset (); |
74921315 | 10148 | |
aa66c379 | 10149 | type = get_die_type_at_offset (sect_off, cu->per_cu, cu->per_objfile); |
78134374 | 10150 | if (type != NULL && type->code () == TYPE_CODE_NAMESPACE) |
74921315 KS |
10151 | { |
10152 | /* This declaration is a global namespace alias. Add | |
10153 | a symbol for it whose type is the aliased namespace. */ | |
10154 | new_symbol (die, type, cu); | |
10155 | return 1; | |
10156 | } | |
10157 | } | |
10158 | } | |
10159 | ||
10160 | return 0; | |
10161 | } | |
10162 | ||
22cee43f | 10163 | /* Return the using directives repository (global or local?) to use in the |
804d2729 | 10164 | current context for CU. |
22cee43f PMR |
10165 | |
10166 | For Ada, imported declarations can materialize renamings, which *may* be | |
10167 | global. However it is impossible (for now?) in DWARF to distinguish | |
10168 | "external" imported declarations and "static" ones. As all imported | |
10169 | declarations seem to be static in all other languages, make them all CU-wide | |
10170 | global only in Ada. */ | |
10171 | ||
10172 | static struct using_direct ** | |
804d2729 | 10173 | using_directives (struct dwarf2_cu *cu) |
22cee43f | 10174 | { |
c24bdb02 KS |
10175 | if (cu->language == language_ada |
10176 | && cu->get_builder ()->outermost_context_p ()) | |
10177 | return cu->get_builder ()->get_global_using_directives (); | |
22cee43f | 10178 | else |
c24bdb02 | 10179 | return cu->get_builder ()->get_local_using_directives (); |
22cee43f PMR |
10180 | } |
10181 | ||
27aa8d6a SW |
10182 | /* Read the import statement specified by the given die and record it. */ |
10183 | ||
10184 | static void | |
10185 | read_import_statement (struct die_info *die, struct dwarf2_cu *cu) | |
10186 | { | |
5e22e966 | 10187 | struct objfile *objfile = cu->per_objfile->objfile; |
27aa8d6a | 10188 | struct attribute *import_attr; |
32019081 | 10189 | struct die_info *imported_die, *child_die; |
de4affc9 | 10190 | struct dwarf2_cu *imported_cu; |
27aa8d6a | 10191 | const char *imported_name; |
794684b6 | 10192 | const char *imported_name_prefix; |
13387711 SW |
10193 | const char *canonical_name; |
10194 | const char *import_alias; | |
10195 | const char *imported_declaration = NULL; | |
794684b6 | 10196 | const char *import_prefix; |
eb1e02fd | 10197 | std::vector<const char *> excludes; |
13387711 | 10198 | |
27aa8d6a SW |
10199 | import_attr = dwarf2_attr (die, DW_AT_import, cu); |
10200 | if (import_attr == NULL) | |
10201 | { | |
b98664d3 | 10202 | complaint (_("Tag '%s' has no DW_AT_import"), |
27aa8d6a SW |
10203 | dwarf_tag_name (die->tag)); |
10204 | return; | |
10205 | } | |
10206 | ||
de4affc9 CC |
10207 | imported_cu = cu; |
10208 | imported_die = follow_die_ref_or_sig (die, import_attr, &imported_cu); | |
10209 | imported_name = dwarf2_name (imported_die, imported_cu); | |
27aa8d6a SW |
10210 | if (imported_name == NULL) |
10211 | { | |
10212 | /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524 | |
10213 | ||
dda83cd7 SM |
10214 | The import in the following code: |
10215 | namespace A | |
10216 | { | |
10217 | typedef int B; | |
10218 | } | |
10219 | ||
10220 | int main () | |
10221 | { | |
10222 | using A::B; | |
10223 | B b; | |
10224 | return b; | |
10225 | } | |
10226 | ||
10227 | ... | |
10228 | <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration) | |
10229 | <52> DW_AT_decl_file : 1 | |
10230 | <53> DW_AT_decl_line : 6 | |
10231 | <54> DW_AT_import : <0x75> | |
10232 | <2><58>: Abbrev Number: 4 (DW_TAG_typedef) | |
10233 | <59> DW_AT_name : B | |
10234 | <5b> DW_AT_decl_file : 1 | |
10235 | <5c> DW_AT_decl_line : 2 | |
10236 | <5d> DW_AT_type : <0x6e> | |
10237 | ... | |
10238 | <1><75>: Abbrev Number: 7 (DW_TAG_base_type) | |
10239 | <76> DW_AT_byte_size : 4 | |
10240 | <77> DW_AT_encoding : 5 (signed) | |
10241 | ||
10242 | imports the wrong die ( 0x75 instead of 0x58 ). | |
10243 | This case will be ignored until the gcc bug is fixed. */ | |
27aa8d6a SW |
10244 | return; |
10245 | } | |
10246 | ||
82856980 SW |
10247 | /* Figure out the local name after import. */ |
10248 | import_alias = dwarf2_name (die, cu); | |
27aa8d6a | 10249 | |
794684b6 SW |
10250 | /* Figure out where the statement is being imported to. */ |
10251 | import_prefix = determine_prefix (die, cu); | |
10252 | ||
10253 | /* Figure out what the scope of the imported die is and prepend it | |
10254 | to the name of the imported die. */ | |
de4affc9 | 10255 | imported_name_prefix = determine_prefix (imported_die, imported_cu); |
794684b6 | 10256 | |
f55ee35c JK |
10257 | if (imported_die->tag != DW_TAG_namespace |
10258 | && imported_die->tag != DW_TAG_module) | |
794684b6 | 10259 | { |
13387711 SW |
10260 | imported_declaration = imported_name; |
10261 | canonical_name = imported_name_prefix; | |
794684b6 | 10262 | } |
13387711 | 10263 | else if (strlen (imported_name_prefix) > 0) |
12aaed36 | 10264 | canonical_name = obconcat (&objfile->objfile_obstack, |
45280282 IB |
10265 | imported_name_prefix, |
10266 | (cu->language == language_d ? "." : "::"), | |
10267 | imported_name, (char *) NULL); | |
13387711 SW |
10268 | else |
10269 | canonical_name = imported_name; | |
794684b6 | 10270 | |
32019081 JK |
10271 | if (die->tag == DW_TAG_imported_module && cu->language == language_fortran) |
10272 | for (child_die = die->child; child_die && child_die->tag; | |
436c571c | 10273 | child_die = child_die->sibling) |
32019081 JK |
10274 | { |
10275 | /* DWARF-4: A Fortran use statement with a “rename list” may be | |
10276 | represented by an imported module entry with an import attribute | |
10277 | referring to the module and owned entries corresponding to those | |
10278 | entities that are renamed as part of being imported. */ | |
10279 | ||
10280 | if (child_die->tag != DW_TAG_imported_declaration) | |
10281 | { | |
b98664d3 | 10282 | complaint (_("child DW_TAG_imported_declaration expected " |
9d8780f0 SM |
10283 | "- DIE at %s [in module %s]"), |
10284 | sect_offset_str (child_die->sect_off), | |
10285 | objfile_name (objfile)); | |
32019081 JK |
10286 | continue; |
10287 | } | |
10288 | ||
10289 | import_attr = dwarf2_attr (child_die, DW_AT_import, cu); | |
10290 | if (import_attr == NULL) | |
10291 | { | |
b98664d3 | 10292 | complaint (_("Tag '%s' has no DW_AT_import"), |
32019081 JK |
10293 | dwarf_tag_name (child_die->tag)); |
10294 | continue; | |
10295 | } | |
10296 | ||
10297 | imported_cu = cu; | |
10298 | imported_die = follow_die_ref_or_sig (child_die, import_attr, | |
10299 | &imported_cu); | |
10300 | imported_name = dwarf2_name (imported_die, imported_cu); | |
10301 | if (imported_name == NULL) | |
10302 | { | |
b98664d3 | 10303 | complaint (_("child DW_TAG_imported_declaration has unknown " |
9d8780f0 SM |
10304 | "imported name - DIE at %s [in module %s]"), |
10305 | sect_offset_str (child_die->sect_off), | |
10306 | objfile_name (objfile)); | |
32019081 JK |
10307 | continue; |
10308 | } | |
10309 | ||
eb1e02fd | 10310 | excludes.push_back (imported_name); |
32019081 JK |
10311 | |
10312 | process_die (child_die, cu); | |
10313 | } | |
10314 | ||
804d2729 | 10315 | add_using_directive (using_directives (cu), |
22cee43f PMR |
10316 | import_prefix, |
10317 | canonical_name, | |
10318 | import_alias, | |
10319 | imported_declaration, | |
10320 | excludes, | |
10321 | 0, | |
10322 | &objfile->objfile_obstack); | |
27aa8d6a SW |
10323 | } |
10324 | ||
5230b05a WT |
10325 | /* ICC<14 does not output the required DW_AT_declaration on incomplete |
10326 | types, but gives them a size of zero. Starting with version 14, | |
10327 | ICC is compatible with GCC. */ | |
10328 | ||
9068261f | 10329 | static bool |
5230b05a WT |
10330 | producer_is_icc_lt_14 (struct dwarf2_cu *cu) |
10331 | { | |
10332 | if (!cu->checked_producer) | |
10333 | check_producer (cu); | |
10334 | ||
10335 | return cu->producer_is_icc_lt_14; | |
10336 | } | |
10337 | ||
eb77c9df AB |
10338 | /* ICC generates a DW_AT_type for C void functions. This was observed on |
10339 | ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2) | |
10340 | which says that void functions should not have a DW_AT_type. */ | |
10341 | ||
10342 | static bool | |
10343 | producer_is_icc (struct dwarf2_cu *cu) | |
10344 | { | |
10345 | if (!cu->checked_producer) | |
10346 | check_producer (cu); | |
10347 | ||
10348 | return cu->producer_is_icc; | |
10349 | } | |
10350 | ||
1b80a9fa JK |
10351 | /* Check for possibly missing DW_AT_comp_dir with relative .debug_line |
10352 | directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed | |
10353 | this, it was first present in GCC release 4.3.0. */ | |
10354 | ||
9068261f | 10355 | static bool |
1b80a9fa JK |
10356 | producer_is_gcc_lt_4_3 (struct dwarf2_cu *cu) |
10357 | { | |
10358 | if (!cu->checked_producer) | |
10359 | check_producer (cu); | |
10360 | ||
10361 | return cu->producer_is_gcc_lt_4_3; | |
10362 | } | |
10363 | ||
d721ba37 PA |
10364 | static file_and_directory |
10365 | find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu) | |
9291a0cd | 10366 | { |
d721ba37 PA |
10367 | file_and_directory res; |
10368 | ||
9291a0cd TT |
10369 | /* Find the filename. Do not use dwarf2_name here, since the filename |
10370 | is not a source language identifier. */ | |
d721ba37 PA |
10371 | res.name = dwarf2_string_attr (die, DW_AT_name, cu); |
10372 | res.comp_dir = dwarf2_string_attr (die, DW_AT_comp_dir, cu); | |
9291a0cd | 10373 | |
d721ba37 PA |
10374 | if (res.comp_dir == NULL |
10375 | && producer_is_gcc_lt_4_3 (cu) && res.name != NULL | |
10376 | && IS_ABSOLUTE_PATH (res.name)) | |
9291a0cd | 10377 | { |
d721ba37 PA |
10378 | res.comp_dir_storage = ldirname (res.name); |
10379 | if (!res.comp_dir_storage.empty ()) | |
10380 | res.comp_dir = res.comp_dir_storage.c_str (); | |
9291a0cd | 10381 | } |
d721ba37 | 10382 | if (res.comp_dir != NULL) |
9291a0cd TT |
10383 | { |
10384 | /* Irix 6.2 native cc prepends <machine>.: to the compilation | |
10385 | directory, get rid of it. */ | |
d721ba37 | 10386 | const char *cp = strchr (res.comp_dir, ':'); |
9291a0cd | 10387 | |
d721ba37 PA |
10388 | if (cp && cp != res.comp_dir && cp[-1] == '.' && cp[1] == '/') |
10389 | res.comp_dir = cp + 1; | |
9291a0cd TT |
10390 | } |
10391 | ||
d721ba37 PA |
10392 | if (res.name == NULL) |
10393 | res.name = "<unknown>"; | |
10394 | ||
10395 | return res; | |
9291a0cd TT |
10396 | } |
10397 | ||
f4dc4d17 DE |
10398 | /* Handle DW_AT_stmt_list for a compilation unit. |
10399 | DIE is the DW_TAG_compile_unit die for CU. | |
c3b7b696 YQ |
10400 | COMP_DIR is the compilation directory. LOWPC is passed to |
10401 | dwarf_decode_lines. See dwarf_decode_lines comments about it. */ | |
2ab95328 TT |
10402 | |
10403 | static void | |
10404 | handle_DW_AT_stmt_list (struct die_info *die, struct dwarf2_cu *cu, | |
c3b7b696 | 10405 | const char *comp_dir, CORE_ADDR lowpc) /* ARI: editCase function */ |
2ab95328 | 10406 | { |
976ca316 | 10407 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
2ab95328 | 10408 | struct attribute *attr; |
527f3840 JK |
10409 | struct line_header line_header_local; |
10410 | hashval_t line_header_local_hash; | |
527f3840 JK |
10411 | void **slot; |
10412 | int decode_mapping; | |
2ab95328 | 10413 | |
f4dc4d17 DE |
10414 | gdb_assert (! cu->per_cu->is_debug_types); |
10415 | ||
2ab95328 | 10416 | attr = dwarf2_attr (die, DW_AT_stmt_list, cu); |
d4df075e | 10417 | if (attr == NULL || !attr->form_is_unsigned ()) |
527f3840 JK |
10418 | return; |
10419 | ||
d4df075e | 10420 | sect_offset line_offset = (sect_offset) attr->as_unsigned (); |
527f3840 JK |
10421 | |
10422 | /* The line header hash table is only created if needed (it exists to | |
10423 | prevent redundant reading of the line table for partial_units). | |
10424 | If we're given a partial_unit, we'll need it. If we're given a | |
10425 | compile_unit, then use the line header hash table if it's already | |
10426 | created, but don't create one just yet. */ | |
10427 | ||
976ca316 | 10428 | if (per_objfile->line_header_hash == NULL |
527f3840 | 10429 | && die->tag == DW_TAG_partial_unit) |
2ab95328 | 10430 | { |
976ca316 | 10431 | per_objfile->line_header_hash |
d15acc42 TT |
10432 | .reset (htab_create_alloc (127, line_header_hash_voidp, |
10433 | line_header_eq_voidp, | |
10434 | free_line_header_voidp, | |
10435 | xcalloc, xfree)); | |
527f3840 | 10436 | } |
2ab95328 | 10437 | |
9c541725 | 10438 | line_header_local.sect_off = line_offset; |
527f3840 JK |
10439 | line_header_local.offset_in_dwz = cu->per_cu->is_dwz; |
10440 | line_header_local_hash = line_header_hash (&line_header_local); | |
976ca316 | 10441 | if (per_objfile->line_header_hash != NULL) |
527f3840 | 10442 | { |
976ca316 | 10443 | slot = htab_find_slot_with_hash (per_objfile->line_header_hash.get (), |
527f3840 JK |
10444 | &line_header_local, |
10445 | line_header_local_hash, NO_INSERT); | |
10446 | ||
10447 | /* For DW_TAG_compile_unit we need info like symtab::linetable which | |
10448 | is not present in *SLOT (since if there is something in *SLOT then | |
10449 | it will be for a partial_unit). */ | |
10450 | if (die->tag == DW_TAG_partial_unit && slot != NULL) | |
dee91e82 | 10451 | { |
527f3840 | 10452 | gdb_assert (*slot != NULL); |
9a3c8263 | 10453 | cu->line_header = (struct line_header *) *slot; |
527f3840 | 10454 | return; |
dee91e82 | 10455 | } |
2ab95328 | 10456 | } |
527f3840 JK |
10457 | |
10458 | /* dwarf_decode_line_header does not yet provide sufficient information. | |
10459 | We always have to call also dwarf_decode_lines for it. */ | |
fff8551c PA |
10460 | line_header_up lh = dwarf_decode_line_header (line_offset, cu); |
10461 | if (lh == NULL) | |
527f3840 | 10462 | return; |
4c8aa72d PA |
10463 | |
10464 | cu->line_header = lh.release (); | |
10465 | cu->line_header_die_owner = die; | |
527f3840 | 10466 | |
976ca316 | 10467 | if (per_objfile->line_header_hash == NULL) |
527f3840 JK |
10468 | slot = NULL; |
10469 | else | |
10470 | { | |
976ca316 | 10471 | slot = htab_find_slot_with_hash (per_objfile->line_header_hash.get (), |
527f3840 JK |
10472 | &line_header_local, |
10473 | line_header_local_hash, INSERT); | |
10474 | gdb_assert (slot != NULL); | |
10475 | } | |
10476 | if (slot != NULL && *slot == NULL) | |
10477 | { | |
10478 | /* This newly decoded line number information unit will be owned | |
10479 | by line_header_hash hash table. */ | |
10480 | *slot = cu->line_header; | |
4c8aa72d | 10481 | cu->line_header_die_owner = NULL; |
527f3840 JK |
10482 | } |
10483 | else | |
10484 | { | |
10485 | /* We cannot free any current entry in (*slot) as that struct line_header | |
dda83cd7 | 10486 | may be already used by multiple CUs. Create only temporary decoded |
527f3840 JK |
10487 | line_header for this CU - it may happen at most once for each line |
10488 | number information unit. And if we're not using line_header_hash | |
10489 | then this is what we want as well. */ | |
10490 | gdb_assert (die->tag != DW_TAG_partial_unit); | |
527f3840 JK |
10491 | } |
10492 | decode_mapping = (die->tag != DW_TAG_partial_unit); | |
10493 | dwarf_decode_lines (cu->line_header, comp_dir, cu, NULL, lowpc, | |
10494 | decode_mapping); | |
fff8551c | 10495 | |
2ab95328 TT |
10496 | } |
10497 | ||
95554aad | 10498 | /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */ |
ae2de4f8 | 10499 | |
c906108c | 10500 | static void |
e7c27a73 | 10501 | read_file_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 10502 | { |
976ca316 SM |
10503 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
10504 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 10505 | struct gdbarch *gdbarch = objfile->arch (); |
2acceee2 | 10506 | CORE_ADDR lowpc = ((CORE_ADDR) -1); |
c906108c SS |
10507 | CORE_ADDR highpc = ((CORE_ADDR) 0); |
10508 | struct attribute *attr; | |
c906108c | 10509 | struct die_info *child_die; |
e142c38c | 10510 | CORE_ADDR baseaddr; |
6e70227d | 10511 | |
380618d6 | 10512 | prepare_one_comp_unit (cu, die, cu->language); |
b3b3bada | 10513 | baseaddr = objfile->text_section_offset (); |
c906108c | 10514 | |
fae299cd | 10515 | get_scope_pc_bounds (die, &lowpc, &highpc, cu); |
c906108c SS |
10516 | |
10517 | /* If we didn't find a lowpc, set it to highpc to avoid complaints | |
10518 | from finish_block. */ | |
2acceee2 | 10519 | if (lowpc == ((CORE_ADDR) -1)) |
c906108c | 10520 | lowpc = highpc; |
3e29f34a | 10521 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
c906108c | 10522 | |
d721ba37 | 10523 | file_and_directory fnd = find_file_and_directory (die, cu); |
e1024ff1 | 10524 | |
f4b8a18d KW |
10525 | /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not |
10526 | standardised yet. As a workaround for the language detection we fall | |
10527 | back to the DW_AT_producer string. */ | |
10528 | if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL") != NULL) | |
10529 | cu->language = language_opencl; | |
10530 | ||
3019eac3 DE |
10531 | /* Similar hack for Go. */ |
10532 | if (cu->producer && strstr (cu->producer, "GNU Go ") != NULL) | |
10533 | set_cu_language (DW_LANG_Go, cu); | |
10534 | ||
c24bdb02 | 10535 | cu->start_symtab (fnd.name, fnd.comp_dir, lowpc); |
3019eac3 DE |
10536 | |
10537 | /* Decode line number information if present. We do this before | |
10538 | processing child DIEs, so that the line header table is available | |
10539 | for DW_AT_decl_file. */ | |
d721ba37 | 10540 | handle_DW_AT_stmt_list (die, cu, fnd.comp_dir, lowpc); |
3019eac3 DE |
10541 | |
10542 | /* Process all dies in compilation unit. */ | |
10543 | if (die->child != NULL) | |
10544 | { | |
10545 | child_die = die->child; | |
10546 | while (child_die && child_die->tag) | |
10547 | { | |
10548 | process_die (child_die, cu); | |
436c571c | 10549 | child_die = child_die->sibling; |
3019eac3 DE |
10550 | } |
10551 | } | |
10552 | ||
10553 | /* Decode macro information, if present. Dwarf 2 macro information | |
10554 | refers to information in the line number info statement program | |
10555 | header, so we can only read it if we've read the header | |
10556 | successfully. */ | |
0af92d60 JK |
10557 | attr = dwarf2_attr (die, DW_AT_macros, cu); |
10558 | if (attr == NULL) | |
10559 | attr = dwarf2_attr (die, DW_AT_GNU_macros, cu); | |
529908cb | 10560 | if (attr != nullptr && attr->form_is_unsigned () && cu->line_header) |
3019eac3 DE |
10561 | { |
10562 | if (dwarf2_attr (die, DW_AT_macro_info, cu)) | |
b98664d3 | 10563 | complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info")); |
3019eac3 | 10564 | |
529908cb | 10565 | dwarf_decode_macros (cu, attr->as_unsigned (), 1); |
3019eac3 DE |
10566 | } |
10567 | else | |
10568 | { | |
10569 | attr = dwarf2_attr (die, DW_AT_macro_info, cu); | |
529908cb | 10570 | if (attr != nullptr && attr->form_is_unsigned () && cu->line_header) |
3019eac3 | 10571 | { |
529908cb | 10572 | unsigned int macro_offset = attr->as_unsigned (); |
3019eac3 | 10573 | |
43f3e411 | 10574 | dwarf_decode_macros (cu, macro_offset, 0); |
3019eac3 DE |
10575 | } |
10576 | } | |
3019eac3 DE |
10577 | } |
10578 | ||
c24bdb02 KS |
10579 | void |
10580 | dwarf2_cu::setup_type_unit_groups (struct die_info *die) | |
3019eac3 | 10581 | { |
f4dc4d17 DE |
10582 | struct type_unit_group *tu_group; |
10583 | int first_time; | |
3019eac3 | 10584 | struct attribute *attr; |
9c541725 | 10585 | unsigned int i; |
0186c6a7 | 10586 | struct signatured_type *sig_type; |
3019eac3 | 10587 | |
f4dc4d17 | 10588 | gdb_assert (per_cu->is_debug_types); |
0186c6a7 | 10589 | sig_type = (struct signatured_type *) per_cu; |
3019eac3 | 10590 | |
c24bdb02 | 10591 | attr = dwarf2_attr (die, DW_AT_stmt_list, this); |
3019eac3 | 10592 | |
f4dc4d17 | 10593 | /* If we're using .gdb_index (includes -readnow) then |
74e04d1c | 10594 | per_cu->type_unit_group may not have been set up yet. */ |
0186c6a7 | 10595 | if (sig_type->type_unit_group == NULL) |
c24bdb02 | 10596 | sig_type->type_unit_group = get_type_unit_group (this, attr); |
0186c6a7 | 10597 | tu_group = sig_type->type_unit_group; |
f4dc4d17 DE |
10598 | |
10599 | /* If we've already processed this stmt_list there's no real need to | |
10600 | do it again, we could fake it and just recreate the part we need | |
10601 | (file name,index -> symtab mapping). If data shows this optimization | |
10602 | is useful we can do it then. */ | |
8adb8487 TT |
10603 | type_unit_group_unshareable *tug_unshare |
10604 | = per_objfile->get_type_unit_group_unshareable (tu_group); | |
10605 | first_time = tug_unshare->compunit_symtab == NULL; | |
f4dc4d17 DE |
10606 | |
10607 | /* We have to handle the case of both a missing DW_AT_stmt_list or bad | |
10608 | debug info. */ | |
fff8551c | 10609 | line_header_up lh; |
d4df075e | 10610 | if (attr != NULL && attr->form_is_unsigned ()) |
3019eac3 | 10611 | { |
d4df075e | 10612 | sect_offset line_offset = (sect_offset) attr->as_unsigned (); |
c24bdb02 | 10613 | lh = dwarf_decode_line_header (line_offset, this); |
f4dc4d17 DE |
10614 | } |
10615 | if (lh == NULL) | |
10616 | { | |
10617 | if (first_time) | |
c24bdb02 | 10618 | start_symtab ("", NULL, 0); |
f4dc4d17 DE |
10619 | else |
10620 | { | |
8adb8487 | 10621 | gdb_assert (tug_unshare->symtabs == NULL); |
c24bdb02 | 10622 | gdb_assert (m_builder == nullptr); |
8adb8487 | 10623 | struct compunit_symtab *cust = tug_unshare->compunit_symtab; |
c24bdb02 KS |
10624 | m_builder.reset (new struct buildsym_compunit |
10625 | (COMPUNIT_OBJFILE (cust), "", | |
10626 | COMPUNIT_DIRNAME (cust), | |
10627 | compunit_language (cust), | |
10628 | 0, cust)); | |
770479f2 | 10629 | list_in_scope = get_builder ()->get_file_symbols (); |
f4dc4d17 | 10630 | } |
f4dc4d17 | 10631 | return; |
3019eac3 DE |
10632 | } |
10633 | ||
c24bdb02 KS |
10634 | line_header = lh.release (); |
10635 | line_header_die_owner = die; | |
3019eac3 | 10636 | |
f4dc4d17 DE |
10637 | if (first_time) |
10638 | { | |
c24bdb02 | 10639 | struct compunit_symtab *cust = start_symtab ("", NULL, 0); |
3019eac3 | 10640 | |
1fd60fc0 DE |
10641 | /* Note: We don't assign tu_group->compunit_symtab yet because we're |
10642 | still initializing it, and our caller (a few levels up) | |
10643 | process_full_type_unit still needs to know if this is the first | |
10644 | time. */ | |
10645 | ||
8adb8487 | 10646 | tug_unshare->symtabs |
4ac93832 TT |
10647 | = XOBNEWVEC (&COMPUNIT_OBJFILE (cust)->objfile_obstack, |
10648 | struct symtab *, line_header->file_names_size ()); | |
3019eac3 | 10649 | |
7ba99d21 AT |
10650 | auto &file_names = line_header->file_names (); |
10651 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10652 | { |
7ba99d21 | 10653 | file_entry &fe = file_names[i]; |
c24bdb02 KS |
10654 | dwarf2_start_subfile (this, fe.name, |
10655 | fe.include_dir (line_header)); | |
10656 | buildsym_compunit *b = get_builder (); | |
10657 | if (b->get_current_subfile ()->symtab == NULL) | |
f4dc4d17 | 10658 | { |
4c8aa72d PA |
10659 | /* NOTE: start_subfile will recognize when it's been |
10660 | passed a file it has already seen. So we can't | |
10661 | assume there's a simple mapping from | |
10662 | cu->line_header->file_names to subfiles, plus | |
10663 | cu->line_header->file_names may contain dups. */ | |
c24bdb02 KS |
10664 | b->get_current_subfile ()->symtab |
10665 | = allocate_symtab (cust, b->get_current_subfile ()->name); | |
f4dc4d17 DE |
10666 | } |
10667 | ||
c24bdb02 | 10668 | fe.symtab = b->get_current_subfile ()->symtab; |
8adb8487 | 10669 | tug_unshare->symtabs[i] = fe.symtab; |
f4dc4d17 DE |
10670 | } |
10671 | } | |
10672 | else | |
3019eac3 | 10673 | { |
c24bdb02 | 10674 | gdb_assert (m_builder == nullptr); |
8adb8487 | 10675 | struct compunit_symtab *cust = tug_unshare->compunit_symtab; |
c24bdb02 KS |
10676 | m_builder.reset (new struct buildsym_compunit |
10677 | (COMPUNIT_OBJFILE (cust), "", | |
10678 | COMPUNIT_DIRNAME (cust), | |
10679 | compunit_language (cust), | |
10680 | 0, cust)); | |
770479f2 | 10681 | list_in_scope = get_builder ()->get_file_symbols (); |
f4dc4d17 | 10682 | |
7ba99d21 AT |
10683 | auto &file_names = line_header->file_names (); |
10684 | for (i = 0; i < file_names.size (); ++i) | |
f4dc4d17 | 10685 | { |
7ba99d21 | 10686 | file_entry &fe = file_names[i]; |
8adb8487 | 10687 | fe.symtab = tug_unshare->symtabs[i]; |
f4dc4d17 | 10688 | } |
3019eac3 DE |
10689 | } |
10690 | ||
f4dc4d17 DE |
10691 | /* The main symtab is allocated last. Type units don't have DW_AT_name |
10692 | so they don't have a "real" (so to speak) symtab anyway. | |
10693 | There is later code that will assign the main symtab to all symbols | |
10694 | that don't have one. We need to handle the case of a symbol with a | |
10695 | missing symtab (DW_AT_decl_file) anyway. */ | |
10696 | } | |
3019eac3 | 10697 | |
f4dc4d17 DE |
10698 | /* Process DW_TAG_type_unit. |
10699 | For TUs we want to skip the first top level sibling if it's not the | |
10700 | actual type being defined by this TU. In this case the first top | |
10701 | level sibling is there to provide context only. */ | |
3019eac3 | 10702 | |
f4dc4d17 DE |
10703 | static void |
10704 | read_type_unit_scope (struct die_info *die, struct dwarf2_cu *cu) | |
10705 | { | |
10706 | struct die_info *child_die; | |
3019eac3 | 10707 | |
f4dc4d17 DE |
10708 | prepare_one_comp_unit (cu, die, language_minimal); |
10709 | ||
10710 | /* Initialize (or reinitialize) the machinery for building symtabs. | |
10711 | We do this before processing child DIEs, so that the line header table | |
10712 | is available for DW_AT_decl_file. */ | |
c24bdb02 | 10713 | cu->setup_type_unit_groups (die); |
f4dc4d17 DE |
10714 | |
10715 | if (die->child != NULL) | |
10716 | { | |
10717 | child_die = die->child; | |
10718 | while (child_die && child_die->tag) | |
10719 | { | |
10720 | process_die (child_die, cu); | |
436c571c | 10721 | child_die = child_die->sibling; |
f4dc4d17 DE |
10722 | } |
10723 | } | |
3019eac3 DE |
10724 | } |
10725 | \f | |
80626a55 DE |
10726 | /* DWO/DWP files. |
10727 | ||
10728 | http://gcc.gnu.org/wiki/DebugFission | |
10729 | http://gcc.gnu.org/wiki/DebugFissionDWP | |
10730 | ||
10731 | To simplify handling of both DWO files ("object" files with the DWARF info) | |
10732 | and DWP files (a file with the DWOs packaged up into one file), we treat | |
10733 | DWP files as having a collection of virtual DWO files. */ | |
3019eac3 DE |
10734 | |
10735 | static hashval_t | |
10736 | hash_dwo_file (const void *item) | |
10737 | { | |
9a3c8263 | 10738 | const struct dwo_file *dwo_file = (const struct dwo_file *) item; |
a2ce51a0 | 10739 | hashval_t hash; |
3019eac3 | 10740 | |
a2ce51a0 DE |
10741 | hash = htab_hash_string (dwo_file->dwo_name); |
10742 | if (dwo_file->comp_dir != NULL) | |
10743 | hash += htab_hash_string (dwo_file->comp_dir); | |
10744 | return hash; | |
3019eac3 DE |
10745 | } |
10746 | ||
10747 | static int | |
10748 | eq_dwo_file (const void *item_lhs, const void *item_rhs) | |
10749 | { | |
9a3c8263 SM |
10750 | const struct dwo_file *lhs = (const struct dwo_file *) item_lhs; |
10751 | const struct dwo_file *rhs = (const struct dwo_file *) item_rhs; | |
3019eac3 | 10752 | |
a2ce51a0 DE |
10753 | if (strcmp (lhs->dwo_name, rhs->dwo_name) != 0) |
10754 | return 0; | |
10755 | if (lhs->comp_dir == NULL || rhs->comp_dir == NULL) | |
10756 | return lhs->comp_dir == rhs->comp_dir; | |
10757 | return strcmp (lhs->comp_dir, rhs->comp_dir) == 0; | |
3019eac3 DE |
10758 | } |
10759 | ||
10760 | /* Allocate a hash table for DWO files. */ | |
10761 | ||
51ac9db5 | 10762 | static htab_up |
298e9637 | 10763 | allocate_dwo_file_hash_table () |
3019eac3 | 10764 | { |
51ac9db5 SM |
10765 | auto delete_dwo_file = [] (void *item) |
10766 | { | |
10767 | struct dwo_file *dwo_file = (struct dwo_file *) item; | |
10768 | ||
10769 | delete dwo_file; | |
10770 | }; | |
10771 | ||
bc68fb19 TT |
10772 | return htab_up (htab_create_alloc (41, |
10773 | hash_dwo_file, | |
10774 | eq_dwo_file, | |
10775 | delete_dwo_file, | |
10776 | xcalloc, xfree)); | |
3019eac3 DE |
10777 | } |
10778 | ||
80626a55 DE |
10779 | /* Lookup DWO file DWO_NAME. */ |
10780 | ||
10781 | static void ** | |
976ca316 | 10782 | lookup_dwo_file_slot (dwarf2_per_objfile *per_objfile, |
ed2dc618 SM |
10783 | const char *dwo_name, |
10784 | const char *comp_dir) | |
80626a55 DE |
10785 | { |
10786 | struct dwo_file find_entry; | |
10787 | void **slot; | |
10788 | ||
976ca316 SM |
10789 | if (per_objfile->per_bfd->dwo_files == NULL) |
10790 | per_objfile->per_bfd->dwo_files = allocate_dwo_file_hash_table (); | |
80626a55 | 10791 | |
0ac5b59e DE |
10792 | find_entry.dwo_name = dwo_name; |
10793 | find_entry.comp_dir = comp_dir; | |
976ca316 | 10794 | slot = htab_find_slot (per_objfile->per_bfd->dwo_files.get (), &find_entry, |
51ac9db5 | 10795 | INSERT); |
80626a55 DE |
10796 | |
10797 | return slot; | |
10798 | } | |
10799 | ||
3019eac3 DE |
10800 | static hashval_t |
10801 | hash_dwo_unit (const void *item) | |
10802 | { | |
9a3c8263 | 10803 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 DE |
10804 | |
10805 | /* This drops the top 32 bits of the id, but is ok for a hash. */ | |
10806 | return dwo_unit->signature; | |
10807 | } | |
10808 | ||
10809 | static int | |
10810 | eq_dwo_unit (const void *item_lhs, const void *item_rhs) | |
10811 | { | |
9a3c8263 SM |
10812 | const struct dwo_unit *lhs = (const struct dwo_unit *) item_lhs; |
10813 | const struct dwo_unit *rhs = (const struct dwo_unit *) item_rhs; | |
3019eac3 DE |
10814 | |
10815 | /* The signature is assumed to be unique within the DWO file. | |
10816 | So while object file CU dwo_id's always have the value zero, | |
10817 | that's OK, assuming each object file DWO file has only one CU, | |
10818 | and that's the rule for now. */ | |
10819 | return lhs->signature == rhs->signature; | |
10820 | } | |
10821 | ||
10822 | /* Allocate a hash table for DWO CUs,TUs. | |
10823 | There is one of these tables for each of CUs,TUs for each DWO file. */ | |
10824 | ||
b0b6a987 | 10825 | static htab_up |
298e9637 | 10826 | allocate_dwo_unit_table () |
3019eac3 DE |
10827 | { |
10828 | /* Start out with a pretty small number. | |
10829 | Generally DWO files contain only one CU and maybe some TUs. */ | |
b0b6a987 TT |
10830 | return htab_up (htab_create_alloc (3, |
10831 | hash_dwo_unit, | |
10832 | eq_dwo_unit, | |
10833 | NULL, xcalloc, xfree)); | |
3019eac3 DE |
10834 | } |
10835 | ||
19c3d4c9 | 10836 | /* die_reader_func for create_dwo_cu. */ |
3019eac3 DE |
10837 | |
10838 | static void | |
19c3d4c9 DE |
10839 | create_dwo_cu_reader (const struct die_reader_specs *reader, |
10840 | const gdb_byte *info_ptr, | |
10841 | struct die_info *comp_unit_die, | |
c0ab21c2 TT |
10842 | struct dwo_file *dwo_file, |
10843 | struct dwo_unit *dwo_unit) | |
3019eac3 DE |
10844 | { |
10845 | struct dwarf2_cu *cu = reader->cu; | |
9c541725 | 10846 | sect_offset sect_off = cu->per_cu->sect_off; |
8a0459fd | 10847 | struct dwarf2_section_info *section = cu->per_cu->section; |
3019eac3 | 10848 | |
a084a2a6 AT |
10849 | gdb::optional<ULONGEST> signature = lookup_dwo_id (cu, comp_unit_die); |
10850 | if (!signature.has_value ()) | |
3019eac3 | 10851 | { |
b98664d3 | 10852 | complaint (_("Dwarf Error: debug entry at offset %s is missing" |
19c3d4c9 | 10853 | " its dwo_id [in module %s]"), |
9d8780f0 | 10854 | sect_offset_str (sect_off), dwo_file->dwo_name); |
3019eac3 DE |
10855 | return; |
10856 | } | |
10857 | ||
3019eac3 | 10858 | dwo_unit->dwo_file = dwo_file; |
a084a2a6 | 10859 | dwo_unit->signature = *signature; |
8a0459fd | 10860 | dwo_unit->section = section; |
9c541725 | 10861 | dwo_unit->sect_off = sect_off; |
3019eac3 DE |
10862 | dwo_unit->length = cu->per_cu->length; |
10863 | ||
6f738b01 SM |
10864 | dwarf_read_debug_printf (" offset %s, dwo_id %s", |
10865 | sect_offset_str (sect_off), | |
10866 | hex_string (dwo_unit->signature)); | |
3019eac3 DE |
10867 | } |
10868 | ||
33c5cd75 | 10869 | /* Create the dwo_units for the CUs in a DWO_FILE. |
19c3d4c9 | 10870 | Note: This function processes DWO files only, not DWP files. */ |
3019eac3 | 10871 | |
33c5cd75 | 10872 | static void |
976ca316 | 10873 | create_cus_hash_table (dwarf2_per_objfile *per_objfile, |
18a8505e | 10874 | dwarf2_cu *cu, struct dwo_file &dwo_file, |
b0b6a987 | 10875 | dwarf2_section_info §ion, htab_up &cus_htab) |
3019eac3 | 10876 | { |
976ca316 SM |
10877 | struct objfile *objfile = per_objfile->objfile; |
10878 | dwarf2_per_bfd *per_bfd = per_objfile->per_bfd; | |
d521ce57 | 10879 | const gdb_byte *info_ptr, *end_ptr; |
3019eac3 | 10880 | |
96b79293 | 10881 | section.read (objfile); |
33c5cd75 | 10882 | info_ptr = section.buffer; |
3019eac3 DE |
10883 | |
10884 | if (info_ptr == NULL) | |
33c5cd75 | 10885 | return; |
3019eac3 | 10886 | |
6f738b01 SM |
10887 | dwarf_read_debug_printf ("Reading %s for %s:", |
10888 | section.get_name (), | |
10889 | section.get_file_name ()); | |
3019eac3 | 10890 | |
33c5cd75 | 10891 | end_ptr = info_ptr + section.size; |
3019eac3 DE |
10892 | while (info_ptr < end_ptr) |
10893 | { | |
10894 | struct dwarf2_per_cu_data per_cu; | |
c0ab21c2 | 10895 | struct dwo_unit read_unit {}; |
33c5cd75 DB |
10896 | struct dwo_unit *dwo_unit; |
10897 | void **slot; | |
10898 | sect_offset sect_off = (sect_offset) (info_ptr - section.buffer); | |
3019eac3 | 10899 | |
1859c670 | 10900 | per_cu.per_bfd = per_bfd; |
3019eac3 | 10901 | per_cu.is_debug_types = 0; |
33c5cd75 DB |
10902 | per_cu.sect_off = sect_offset (info_ptr - section.buffer); |
10903 | per_cu.section = §ion; | |
10904 | ||
976ca316 | 10905 | cutu_reader reader (&per_cu, per_objfile, cu, &dwo_file); |
c0ab21c2 TT |
10906 | if (!reader.dummy_p) |
10907 | create_dwo_cu_reader (&reader, reader.info_ptr, reader.comp_unit_die, | |
3e225074 | 10908 | &dwo_file, &read_unit); |
33c5cd75 DB |
10909 | info_ptr += per_cu.length; |
10910 | ||
10911 | // If the unit could not be parsed, skip it. | |
c0ab21c2 | 10912 | if (read_unit.dwo_file == NULL) |
33c5cd75 | 10913 | continue; |
3019eac3 | 10914 | |
33c5cd75 | 10915 | if (cus_htab == NULL) |
298e9637 | 10916 | cus_htab = allocate_dwo_unit_table (); |
19c3d4c9 | 10917 | |
1859c670 | 10918 | dwo_unit = OBSTACK_ZALLOC (&per_bfd->obstack, |
45940949 | 10919 | struct dwo_unit); |
c0ab21c2 | 10920 | *dwo_unit = read_unit; |
b0b6a987 | 10921 | slot = htab_find_slot (cus_htab.get (), dwo_unit, INSERT); |
33c5cd75 DB |
10922 | gdb_assert (slot != NULL); |
10923 | if (*slot != NULL) | |
19c3d4c9 | 10924 | { |
33c5cd75 DB |
10925 | const struct dwo_unit *dup_cu = (const struct dwo_unit *)*slot; |
10926 | sect_offset dup_sect_off = dup_cu->sect_off; | |
19c3d4c9 | 10927 | |
b98664d3 | 10928 | complaint (_("debug cu entry at offset %s is duplicate to" |
9d8780f0 SM |
10929 | " the entry at offset %s, signature %s"), |
10930 | sect_offset_str (sect_off), sect_offset_str (dup_sect_off), | |
33c5cd75 | 10931 | hex_string (dwo_unit->signature)); |
19c3d4c9 | 10932 | } |
33c5cd75 | 10933 | *slot = (void *)dwo_unit; |
3019eac3 | 10934 | } |
3019eac3 DE |
10935 | } |
10936 | ||
80626a55 DE |
10937 | /* DWP file .debug_{cu,tu}_index section format: |
10938 | [ref: http://gcc.gnu.org/wiki/DebugFissionDWP] | |
d2854d8d CT |
10939 | [ref: http://dwarfstd.org/doc/DWARF5.pdf, sect 7.3.5 "DWARF Package Files"] |
10940 | ||
10941 | DWP Versions 1 & 2 are older, pre-standard format versions. The first | |
10942 | officially standard DWP format was published with DWARF v5 and is called | |
10943 | Version 5. There are no versions 3 or 4. | |
80626a55 | 10944 | |
d2415c6c DE |
10945 | DWP Version 1: |
10946 | ||
80626a55 DE |
10947 | Both index sections have the same format, and serve to map a 64-bit |
10948 | signature to a set of section numbers. Each section begins with a header, | |
10949 | followed by a hash table of 64-bit signatures, a parallel table of 32-bit | |
10950 | indexes, and a pool of 32-bit section numbers. The index sections will be | |
10951 | aligned at 8-byte boundaries in the file. | |
10952 | ||
d2415c6c DE |
10953 | The index section header consists of: |
10954 | ||
10955 | V, 32 bit version number | |
10956 | -, 32 bits unused | |
10957 | N, 32 bit number of compilation units or type units in the index | |
10958 | M, 32 bit number of slots in the hash table | |
80626a55 | 10959 | |
d2415c6c | 10960 | Numbers are recorded using the byte order of the application binary. |
80626a55 | 10961 | |
d2415c6c DE |
10962 | The hash table begins at offset 16 in the section, and consists of an array |
10963 | of M 64-bit slots. Each slot contains a 64-bit signature (using the byte | |
10964 | order of the application binary). Unused slots in the hash table are 0. | |
10965 | (We rely on the extreme unlikeliness of a signature being exactly 0.) | |
80626a55 | 10966 | |
d2415c6c DE |
10967 | The parallel table begins immediately after the hash table |
10968 | (at offset 16 + 8 * M from the beginning of the section), and consists of an | |
10969 | array of 32-bit indexes (using the byte order of the application binary), | |
10970 | corresponding 1-1 with slots in the hash table. Each entry in the parallel | |
10971 | table contains a 32-bit index into the pool of section numbers. For unused | |
10972 | hash table slots, the corresponding entry in the parallel table will be 0. | |
80626a55 | 10973 | |
73869dc2 DE |
10974 | The pool of section numbers begins immediately following the hash table |
10975 | (at offset 16 + 12 * M from the beginning of the section). The pool of | |
10976 | section numbers consists of an array of 32-bit words (using the byte order | |
10977 | of the application binary). Each item in the array is indexed starting | |
10978 | from 0. The hash table entry provides the index of the first section | |
10979 | number in the set. Additional section numbers in the set follow, and the | |
10980 | set is terminated by a 0 entry (section number 0 is not used in ELF). | |
10981 | ||
10982 | In each set of section numbers, the .debug_info.dwo or .debug_types.dwo | |
10983 | section must be the first entry in the set, and the .debug_abbrev.dwo must | |
10984 | be the second entry. Other members of the set may follow in any order. | |
10985 | ||
10986 | --- | |
10987 | ||
d2854d8d | 10988 | DWP Versions 2 and 5: |
73869dc2 | 10989 | |
d2854d8d | 10990 | DWP Versions 2 and 5 combine all the .debug_info, etc. sections into one, |
73869dc2 DE |
10991 | and the entries in the index tables are now offsets into these sections. |
10992 | CU offsets begin at 0. TU offsets begin at the size of the .debug_info | |
10993 | section. | |
10994 | ||
10995 | Index Section Contents: | |
10996 | Header | |
10997 | Hash Table of Signatures dwp_hash_table.hash_table | |
10998 | Parallel Table of Indices dwp_hash_table.unit_table | |
d2854d8d CT |
10999 | Table of Section Offsets dwp_hash_table.{v2|v5}.{section_ids,offsets} |
11000 | Table of Section Sizes dwp_hash_table.{v2|v5}.sizes | |
73869dc2 DE |
11001 | |
11002 | The index section header consists of: | |
11003 | ||
11004 | V, 32 bit version number | |
11005 | L, 32 bit number of columns in the table of section offsets | |
11006 | N, 32 bit number of compilation units or type units in the index | |
11007 | M, 32 bit number of slots in the hash table | |
11008 | ||
11009 | Numbers are recorded using the byte order of the application binary. | |
11010 | ||
11011 | The hash table has the same format as version 1. | |
11012 | The parallel table of indices has the same format as version 1, | |
11013 | except that the entries are origin-1 indices into the table of sections | |
11014 | offsets and the table of section sizes. | |
11015 | ||
11016 | The table of offsets begins immediately following the parallel table | |
11017 | (at offset 16 + 12 * M from the beginning of the section). The table is | |
11018 | a two-dimensional array of 32-bit words (using the byte order of the | |
11019 | application binary), with L columns and N+1 rows, in row-major order. | |
11020 | Each row in the array is indexed starting from 0. The first row provides | |
11021 | a key to the remaining rows: each column in this row provides an identifier | |
11022 | for a debug section, and the offsets in the same column of subsequent rows | |
d2854d8d | 11023 | refer to that section. The section identifiers for Version 2 are: |
73869dc2 DE |
11024 | |
11025 | DW_SECT_INFO 1 .debug_info.dwo | |
11026 | DW_SECT_TYPES 2 .debug_types.dwo | |
11027 | DW_SECT_ABBREV 3 .debug_abbrev.dwo | |
11028 | DW_SECT_LINE 4 .debug_line.dwo | |
11029 | DW_SECT_LOC 5 .debug_loc.dwo | |
11030 | DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo | |
11031 | DW_SECT_MACINFO 7 .debug_macinfo.dwo | |
11032 | DW_SECT_MACRO 8 .debug_macro.dwo | |
11033 | ||
d2854d8d CT |
11034 | The section identifiers for Version 5 are: |
11035 | ||
11036 | DW_SECT_INFO_V5 1 .debug_info.dwo | |
11037 | DW_SECT_RESERVED_V5 2 -- | |
11038 | DW_SECT_ABBREV_V5 3 .debug_abbrev.dwo | |
11039 | DW_SECT_LINE_V5 4 .debug_line.dwo | |
11040 | DW_SECT_LOCLISTS_V5 5 .debug_loclists.dwo | |
11041 | DW_SECT_STR_OFFSETS_V5 6 .debug_str_offsets.dwo | |
11042 | DW_SECT_MACRO_V5 7 .debug_macro.dwo | |
11043 | DW_SECT_RNGLISTS_V5 8 .debug_rnglists.dwo | |
11044 | ||
73869dc2 DE |
11045 | The offsets provided by the CU and TU index sections are the base offsets |
11046 | for the contributions made by each CU or TU to the corresponding section | |
11047 | in the package file. Each CU and TU header contains an abbrev_offset | |
11048 | field, used to find the abbreviations table for that CU or TU within the | |
11049 | contribution to the .debug_abbrev.dwo section for that CU or TU, and should | |
11050 | be interpreted as relative to the base offset given in the index section. | |
11051 | Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes | |
11052 | should be interpreted as relative to the base offset for .debug_line.dwo, | |
11053 | and offsets into other debug sections obtained from DWARF attributes should | |
11054 | also be interpreted as relative to the corresponding base offset. | |
11055 | ||
11056 | The table of sizes begins immediately following the table of offsets. | |
11057 | Like the table of offsets, it is a two-dimensional array of 32-bit words, | |
11058 | with L columns and N rows, in row-major order. Each row in the array is | |
11059 | indexed starting from 1 (row 0 is shared by the two tables). | |
11060 | ||
11061 | --- | |
11062 | ||
11063 | Hash table lookup is handled the same in version 1 and 2: | |
11064 | ||
11065 | We assume that N and M will not exceed 2^32 - 1. | |
11066 | The size of the hash table, M, must be 2^k such that 2^k > 3*N/2. | |
11067 | ||
d2415c6c DE |
11068 | Given a 64-bit compilation unit signature or a type signature S, an entry |
11069 | in the hash table is located as follows: | |
80626a55 | 11070 | |
d2415c6c DE |
11071 | 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with |
11072 | the low-order k bits all set to 1. | |
80626a55 | 11073 | |
d2415c6c | 11074 | 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1). |
80626a55 | 11075 | |
d2415c6c DE |
11076 | 3) If the hash table entry at index H matches the signature, use that |
11077 | entry. If the hash table entry at index H is unused (all zeroes), | |
11078 | terminate the search: the signature is not present in the table. | |
80626a55 | 11079 | |
d2415c6c | 11080 | 4) Let H = (H + H') modulo M. Repeat at Step 3. |
80626a55 | 11081 | |
d2415c6c | 11082 | Because M > N and H' and M are relatively prime, the search is guaranteed |
73869dc2 | 11083 | to stop at an unused slot or find the match. */ |
80626a55 DE |
11084 | |
11085 | /* Create a hash table to map DWO IDs to their CU/TU entry in | |
11086 | .debug_{info,types}.dwo in DWP_FILE. | |
11087 | Returns NULL if there isn't one. | |
11088 | Note: This function processes DWP files only, not DWO files. */ | |
11089 | ||
11090 | static struct dwp_hash_table * | |
976ca316 | 11091 | create_dwp_hash_table (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11092 | struct dwp_file *dwp_file, int is_debug_types) |
80626a55 | 11093 | { |
976ca316 | 11094 | struct objfile *objfile = per_objfile->objfile; |
400174b1 | 11095 | bfd *dbfd = dwp_file->dbfd.get (); |
948f8e3d | 11096 | const gdb_byte *index_ptr, *index_end; |
80626a55 | 11097 | struct dwarf2_section_info *index; |
73869dc2 | 11098 | uint32_t version, nr_columns, nr_units, nr_slots; |
80626a55 DE |
11099 | struct dwp_hash_table *htab; |
11100 | ||
11101 | if (is_debug_types) | |
11102 | index = &dwp_file->sections.tu_index; | |
11103 | else | |
11104 | index = &dwp_file->sections.cu_index; | |
11105 | ||
96b79293 | 11106 | if (index->empty ()) |
80626a55 | 11107 | return NULL; |
96b79293 | 11108 | index->read (objfile); |
80626a55 DE |
11109 | |
11110 | index_ptr = index->buffer; | |
11111 | index_end = index_ptr + index->size; | |
11112 | ||
d2854d8d CT |
11113 | /* For Version 5, the version is really 2 bytes of data & 2 bytes of padding. |
11114 | For now it's safe to just read 4 bytes (particularly as it's difficult to | |
11115 | tell if you're dealing with Version 5 before you've read the version). */ | |
80626a55 | 11116 | version = read_4_bytes (dbfd, index_ptr); |
73869dc2 | 11117 | index_ptr += 4; |
d2854d8d | 11118 | if (version == 2 || version == 5) |
73869dc2 DE |
11119 | nr_columns = read_4_bytes (dbfd, index_ptr); |
11120 | else | |
11121 | nr_columns = 0; | |
11122 | index_ptr += 4; | |
80626a55 DE |
11123 | nr_units = read_4_bytes (dbfd, index_ptr); |
11124 | index_ptr += 4; | |
11125 | nr_slots = read_4_bytes (dbfd, index_ptr); | |
11126 | index_ptr += 4; | |
11127 | ||
d2854d8d | 11128 | if (version != 1 && version != 2 && version != 5) |
80626a55 | 11129 | { |
21aa081e | 11130 | error (_("Dwarf Error: unsupported DWP file version (%s)" |
80626a55 | 11131 | " [in module %s]"), |
21aa081e | 11132 | pulongest (version), dwp_file->name); |
80626a55 DE |
11133 | } |
11134 | if (nr_slots != (nr_slots & -nr_slots)) | |
11135 | { | |
21aa081e | 11136 | error (_("Dwarf Error: number of slots in DWP hash table (%s)" |
80626a55 | 11137 | " is not power of 2 [in module %s]"), |
21aa081e | 11138 | pulongest (nr_slots), dwp_file->name); |
80626a55 DE |
11139 | } |
11140 | ||
976ca316 | 11141 | htab = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwp_hash_table); |
73869dc2 DE |
11142 | htab->version = version; |
11143 | htab->nr_columns = nr_columns; | |
80626a55 DE |
11144 | htab->nr_units = nr_units; |
11145 | htab->nr_slots = nr_slots; | |
11146 | htab->hash_table = index_ptr; | |
11147 | htab->unit_table = htab->hash_table + sizeof (uint64_t) * nr_slots; | |
73869dc2 DE |
11148 | |
11149 | /* Exit early if the table is empty. */ | |
11150 | if (nr_slots == 0 || nr_units == 0 | |
d2854d8d CT |
11151 | || (version == 2 && nr_columns == 0) |
11152 | || (version == 5 && nr_columns == 0)) | |
73869dc2 DE |
11153 | { |
11154 | /* All must be zero. */ | |
11155 | if (nr_slots != 0 || nr_units != 0 | |
d2854d8d CT |
11156 | || (version == 2 && nr_columns != 0) |
11157 | || (version == 5 && nr_columns != 0)) | |
73869dc2 | 11158 | { |
b98664d3 | 11159 | complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not" |
73869dc2 DE |
11160 | " all zero [in modules %s]"), |
11161 | dwp_file->name); | |
11162 | } | |
11163 | return htab; | |
11164 | } | |
11165 | ||
11166 | if (version == 1) | |
11167 | { | |
11168 | htab->section_pool.v1.indices = | |
11169 | htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11170 | /* It's harder to decide whether the section is too small in v1. | |
11171 | V1 is deprecated anyway so we punt. */ | |
11172 | } | |
d2854d8d | 11173 | else if (version == 2) |
73869dc2 DE |
11174 | { |
11175 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11176 | int *ids = htab->section_pool.v2.section_ids; | |
04fd5eed | 11177 | size_t sizeof_ids = sizeof (htab->section_pool.v2.section_ids); |
73869dc2 DE |
11178 | /* Reverse map for error checking. */ |
11179 | int ids_seen[DW_SECT_MAX + 1]; | |
11180 | int i; | |
11181 | ||
11182 | if (nr_columns < 2) | |
11183 | { | |
11184 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11185 | " in section table [in module %s]"), | |
11186 | dwp_file->name); | |
11187 | } | |
11188 | if (nr_columns > MAX_NR_V2_DWO_SECTIONS) | |
11189 | { | |
11190 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11191 | " in section table [in module %s]"), | |
11192 | dwp_file->name); | |
11193 | } | |
04fd5eed GB |
11194 | memset (ids, 255, sizeof_ids); |
11195 | memset (ids_seen, 255, sizeof (ids_seen)); | |
73869dc2 DE |
11196 | for (i = 0; i < nr_columns; ++i) |
11197 | { | |
11198 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11199 | ||
11200 | if (id < DW_SECT_MIN || id > DW_SECT_MAX) | |
11201 | { | |
11202 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11203 | " in section table [in module %s]"), | |
11204 | id, dwp_file->name); | |
11205 | } | |
11206 | if (ids_seen[id] != -1) | |
11207 | { | |
11208 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11209 | " id %d in section table [in module %s]"), | |
11210 | id, dwp_file->name); | |
11211 | } | |
11212 | ids_seen[id] = i; | |
11213 | ids[i] = id; | |
11214 | } | |
11215 | /* Must have exactly one info or types section. */ | |
11216 | if (((ids_seen[DW_SECT_INFO] != -1) | |
11217 | + (ids_seen[DW_SECT_TYPES] != -1)) | |
11218 | != 1) | |
11219 | { | |
11220 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11221 | " DWO info/types section [in module %s]"), | |
11222 | dwp_file->name); | |
11223 | } | |
11224 | /* Must have an abbrev section. */ | |
11225 | if (ids_seen[DW_SECT_ABBREV] == -1) | |
11226 | { | |
11227 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11228 | " section [in module %s]"), | |
11229 | dwp_file->name); | |
11230 | } | |
11231 | htab->section_pool.v2.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11232 | htab->section_pool.v2.sizes = | |
11233 | htab->section_pool.v2.offsets + (sizeof (uint32_t) | |
11234 | * nr_units * nr_columns); | |
11235 | if ((htab->section_pool.v2.sizes + (sizeof (uint32_t) | |
11236 | * nr_units * nr_columns)) | |
11237 | > index_end) | |
11238 | { | |
11239 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11240 | " [in module %s]"), | |
11241 | dwp_file->name); | |
11242 | } | |
11243 | } | |
d2854d8d CT |
11244 | else /* version == 5 */ |
11245 | { | |
11246 | const gdb_byte *ids_ptr = htab->unit_table + sizeof (uint32_t) * nr_slots; | |
11247 | int *ids = htab->section_pool.v5.section_ids; | |
11248 | size_t sizeof_ids = sizeof (htab->section_pool.v5.section_ids); | |
11249 | /* Reverse map for error checking. */ | |
11250 | int ids_seen[DW_SECT_MAX_V5 + 1]; | |
11251 | ||
11252 | if (nr_columns < 2) | |
11253 | { | |
11254 | error (_("Dwarf Error: bad DWP hash table, too few columns" | |
11255 | " in section table [in module %s]"), | |
11256 | dwp_file->name); | |
11257 | } | |
11258 | if (nr_columns > MAX_NR_V5_DWO_SECTIONS) | |
11259 | { | |
11260 | error (_("Dwarf Error: bad DWP hash table, too many columns" | |
11261 | " in section table [in module %s]"), | |
11262 | dwp_file->name); | |
11263 | } | |
11264 | memset (ids, 255, sizeof_ids); | |
11265 | memset (ids_seen, 255, sizeof (ids_seen)); | |
11266 | for (int i = 0; i < nr_columns; ++i) | |
11267 | { | |
11268 | int id = read_4_bytes (dbfd, ids_ptr + i * sizeof (uint32_t)); | |
11269 | ||
11270 | if (id < DW_SECT_MIN || id > DW_SECT_MAX_V5) | |
11271 | { | |
11272 | error (_("Dwarf Error: bad DWP hash table, bad section id %d" | |
11273 | " in section table [in module %s]"), | |
11274 | id, dwp_file->name); | |
11275 | } | |
11276 | if (ids_seen[id] != -1) | |
11277 | { | |
11278 | error (_("Dwarf Error: bad DWP hash table, duplicate section" | |
11279 | " id %d in section table [in module %s]"), | |
11280 | id, dwp_file->name); | |
11281 | } | |
11282 | ids_seen[id] = i; | |
11283 | ids[i] = id; | |
11284 | } | |
11285 | /* Must have seen an info section. */ | |
11286 | if (ids_seen[DW_SECT_INFO_V5] == -1) | |
11287 | { | |
11288 | error (_("Dwarf Error: bad DWP hash table, missing/duplicate" | |
11289 | " DWO info/types section [in module %s]"), | |
11290 | dwp_file->name); | |
11291 | } | |
11292 | /* Must have an abbrev section. */ | |
11293 | if (ids_seen[DW_SECT_ABBREV_V5] == -1) | |
11294 | { | |
11295 | error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev" | |
11296 | " section [in module %s]"), | |
11297 | dwp_file->name); | |
11298 | } | |
11299 | htab->section_pool.v5.offsets = ids_ptr + sizeof (uint32_t) * nr_columns; | |
11300 | htab->section_pool.v5.sizes | |
11301 | = htab->section_pool.v5.offsets + (sizeof (uint32_t) | |
11302 | * nr_units * nr_columns); | |
11303 | if ((htab->section_pool.v5.sizes + (sizeof (uint32_t) | |
11304 | * nr_units * nr_columns)) | |
11305 | > index_end) | |
11306 | { | |
11307 | error (_("Dwarf Error: DWP index section is corrupt (too small)" | |
11308 | " [in module %s]"), | |
11309 | dwp_file->name); | |
11310 | } | |
11311 | } | |
80626a55 DE |
11312 | |
11313 | return htab; | |
11314 | } | |
11315 | ||
11316 | /* Update SECTIONS with the data from SECTP. | |
11317 | ||
5bb6e9dd TT |
11318 | This function is like the other "locate" section routines, but in |
11319 | this context the sections to read comes from the DWP V1 hash table, | |
11320 | not the full ELF section table. | |
80626a55 DE |
11321 | |
11322 | The result is non-zero for success, or zero if an error was found. */ | |
11323 | ||
11324 | static int | |
73869dc2 DE |
11325 | locate_v1_virtual_dwo_sections (asection *sectp, |
11326 | struct virtual_v1_dwo_sections *sections) | |
80626a55 DE |
11327 | { |
11328 | const struct dwop_section_names *names = &dwop_section_names; | |
11329 | ||
fbedd546 | 11330 | if (names->abbrev_dwo.matches (sectp->name)) |
80626a55 DE |
11331 | { |
11332 | /* There can be only one. */ | |
049412e3 | 11333 | if (sections->abbrev.s.section != NULL) |
80626a55 | 11334 | return 0; |
049412e3 | 11335 | sections->abbrev.s.section = sectp; |
fd361982 | 11336 | sections->abbrev.size = bfd_section_size (sectp); |
80626a55 | 11337 | } |
fbedd546 TT |
11338 | else if (names->info_dwo.matches (sectp->name) |
11339 | || names->types_dwo.matches (sectp->name)) | |
80626a55 DE |
11340 | { |
11341 | /* There can be only one. */ | |
049412e3 | 11342 | if (sections->info_or_types.s.section != NULL) |
80626a55 | 11343 | return 0; |
049412e3 | 11344 | sections->info_or_types.s.section = sectp; |
fd361982 | 11345 | sections->info_or_types.size = bfd_section_size (sectp); |
80626a55 | 11346 | } |
fbedd546 | 11347 | else if (names->line_dwo.matches (sectp->name)) |
80626a55 DE |
11348 | { |
11349 | /* There can be only one. */ | |
049412e3 | 11350 | if (sections->line.s.section != NULL) |
80626a55 | 11351 | return 0; |
049412e3 | 11352 | sections->line.s.section = sectp; |
fd361982 | 11353 | sections->line.size = bfd_section_size (sectp); |
80626a55 | 11354 | } |
fbedd546 | 11355 | else if (names->loc_dwo.matches (sectp->name)) |
80626a55 DE |
11356 | { |
11357 | /* There can be only one. */ | |
049412e3 | 11358 | if (sections->loc.s.section != NULL) |
80626a55 | 11359 | return 0; |
049412e3 | 11360 | sections->loc.s.section = sectp; |
fd361982 | 11361 | sections->loc.size = bfd_section_size (sectp); |
80626a55 | 11362 | } |
fbedd546 | 11363 | else if (names->macinfo_dwo.matches (sectp->name)) |
80626a55 DE |
11364 | { |
11365 | /* There can be only one. */ | |
049412e3 | 11366 | if (sections->macinfo.s.section != NULL) |
80626a55 | 11367 | return 0; |
049412e3 | 11368 | sections->macinfo.s.section = sectp; |
fd361982 | 11369 | sections->macinfo.size = bfd_section_size (sectp); |
80626a55 | 11370 | } |
fbedd546 | 11371 | else if (names->macro_dwo.matches (sectp->name)) |
80626a55 DE |
11372 | { |
11373 | /* There can be only one. */ | |
049412e3 | 11374 | if (sections->macro.s.section != NULL) |
80626a55 | 11375 | return 0; |
049412e3 | 11376 | sections->macro.s.section = sectp; |
fd361982 | 11377 | sections->macro.size = bfd_section_size (sectp); |
80626a55 | 11378 | } |
fbedd546 | 11379 | else if (names->str_offsets_dwo.matches (sectp->name)) |
80626a55 DE |
11380 | { |
11381 | /* There can be only one. */ | |
049412e3 | 11382 | if (sections->str_offsets.s.section != NULL) |
80626a55 | 11383 | return 0; |
049412e3 | 11384 | sections->str_offsets.s.section = sectp; |
fd361982 | 11385 | sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 DE |
11386 | } |
11387 | else | |
11388 | { | |
11389 | /* No other kind of section is valid. */ | |
11390 | return 0; | |
11391 | } | |
11392 | ||
11393 | return 1; | |
11394 | } | |
11395 | ||
73869dc2 DE |
11396 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. |
11397 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11398 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11399 | This is for DWP version 1 files. */ | |
80626a55 DE |
11400 | |
11401 | static struct dwo_unit * | |
976ca316 | 11402 | create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11403 | struct dwp_file *dwp_file, |
73869dc2 DE |
11404 | uint32_t unit_index, |
11405 | const char *comp_dir, | |
11406 | ULONGEST signature, int is_debug_types) | |
80626a55 | 11407 | { |
73869dc2 DE |
11408 | const struct dwp_hash_table *dwp_htab = |
11409 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11410 | bfd *dbfd = dwp_file->dbfd.get (); |
80626a55 DE |
11411 | const char *kind = is_debug_types ? "TU" : "CU"; |
11412 | struct dwo_file *dwo_file; | |
11413 | struct dwo_unit *dwo_unit; | |
73869dc2 | 11414 | struct virtual_v1_dwo_sections sections; |
80626a55 | 11415 | void **dwo_file_slot; |
80626a55 DE |
11416 | int i; |
11417 | ||
73869dc2 DE |
11418 | gdb_assert (dwp_file->version == 1); |
11419 | ||
6f738b01 SM |
11420 | dwarf_read_debug_printf ("Reading %s %s/%s in DWP V1 file: %s", |
11421 | kind, pulongest (unit_index), hex_string (signature), | |
11422 | dwp_file->name); | |
80626a55 | 11423 | |
19ac8c2e | 11424 | /* Fetch the sections of this DWO unit. |
80626a55 DE |
11425 | Put a limit on the number of sections we look for so that bad data |
11426 | doesn't cause us to loop forever. */ | |
11427 | ||
73869dc2 | 11428 | #define MAX_NR_V1_DWO_SECTIONS \ |
80626a55 DE |
11429 | (1 /* .debug_info or .debug_types */ \ |
11430 | + 1 /* .debug_abbrev */ \ | |
11431 | + 1 /* .debug_line */ \ | |
11432 | + 1 /* .debug_loc */ \ | |
11433 | + 1 /* .debug_str_offsets */ \ | |
19ac8c2e | 11434 | + 1 /* .debug_macro or .debug_macinfo */ \ |
80626a55 DE |
11435 | + 1 /* trailing zero */) |
11436 | ||
11437 | memset (§ions, 0, sizeof (sections)); | |
80626a55 | 11438 | |
73869dc2 | 11439 | for (i = 0; i < MAX_NR_V1_DWO_SECTIONS; ++i) |
80626a55 DE |
11440 | { |
11441 | asection *sectp; | |
11442 | uint32_t section_nr = | |
11443 | read_4_bytes (dbfd, | |
73869dc2 DE |
11444 | dwp_htab->section_pool.v1.indices |
11445 | + (unit_index + i) * sizeof (uint32_t)); | |
80626a55 DE |
11446 | |
11447 | if (section_nr == 0) | |
11448 | break; | |
11449 | if (section_nr >= dwp_file->num_sections) | |
11450 | { | |
11451 | error (_("Dwarf Error: bad DWP hash table, section number too large" | |
11452 | " [in module %s]"), | |
11453 | dwp_file->name); | |
11454 | } | |
11455 | ||
11456 | sectp = dwp_file->elf_sections[section_nr]; | |
73869dc2 | 11457 | if (! locate_v1_virtual_dwo_sections (sectp, §ions)) |
80626a55 DE |
11458 | { |
11459 | error (_("Dwarf Error: bad DWP hash table, invalid section found" | |
11460 | " [in module %s]"), | |
11461 | dwp_file->name); | |
11462 | } | |
11463 | } | |
11464 | ||
11465 | if (i < 2 | |
96b79293 TT |
11466 | || sections.info_or_types.empty () |
11467 | || sections.abbrev.empty ()) | |
80626a55 DE |
11468 | { |
11469 | error (_("Dwarf Error: bad DWP hash table, missing DWO sections" | |
11470 | " [in module %s]"), | |
11471 | dwp_file->name); | |
11472 | } | |
73869dc2 | 11473 | if (i == MAX_NR_V1_DWO_SECTIONS) |
80626a55 DE |
11474 | { |
11475 | error (_("Dwarf Error: bad DWP hash table, too many DWO sections" | |
11476 | " [in module %s]"), | |
11477 | dwp_file->name); | |
11478 | } | |
11479 | ||
11480 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11481 | have dwo_unit "live" in that. At least for now. | |
11482 | ||
11483 | The DWP file can be made up of a random collection of CUs and TUs. | |
c766f7ec | 11484 | However, for each CU + set of TUs that came from the same original DWO |
57d63ce2 DE |
11485 | file, we can combine them back into a virtual DWO file to save space |
11486 | (fewer struct dwo_file objects to allocate). Remember that for really | |
80626a55 DE |
11487 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ |
11488 | ||
791afaa2 TT |
11489 | std::string virtual_dwo_name = |
11490 | string_printf ("virtual-dwo/%d-%d-%d-%d", | |
96b79293 TT |
11491 | sections.abbrev.get_id (), |
11492 | sections.line.get_id (), | |
11493 | sections.loc.get_id (), | |
11494 | sections.str_offsets.get_id ()); | |
80626a55 | 11495 | /* Can we use an existing virtual DWO file? */ |
976ca316 | 11496 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, virtual_dwo_name.c_str (), |
ed2dc618 | 11497 | comp_dir); |
80626a55 DE |
11498 | /* Create one if necessary. */ |
11499 | if (*dwo_file_slot == NULL) | |
11500 | { | |
6f738b01 SM |
11501 | dwarf_read_debug_printf ("Creating virtual DWO: %s", |
11502 | virtual_dwo_name.c_str ()); | |
11503 | ||
51ac9db5 | 11504 | dwo_file = new struct dwo_file; |
976ca316 | 11505 | dwo_file->dwo_name = per_objfile->objfile->intern (virtual_dwo_name); |
0ac5b59e | 11506 | dwo_file->comp_dir = comp_dir; |
80626a55 DE |
11507 | dwo_file->sections.abbrev = sections.abbrev; |
11508 | dwo_file->sections.line = sections.line; | |
11509 | dwo_file->sections.loc = sections.loc; | |
11510 | dwo_file->sections.macinfo = sections.macinfo; | |
11511 | dwo_file->sections.macro = sections.macro; | |
11512 | dwo_file->sections.str_offsets = sections.str_offsets; | |
11513 | /* The "str" section is global to the entire DWP file. */ | |
11514 | dwo_file->sections.str = dwp_file->sections.str; | |
57d63ce2 | 11515 | /* The info or types section is assigned below to dwo_unit, |
80626a55 DE |
11516 | there's no need to record it in dwo_file. |
11517 | Also, we can't simply record type sections in dwo_file because | |
11518 | we record a pointer into the vector in dwo_unit. As we collect more | |
11519 | types we'll grow the vector and eventually have to reallocate space | |
57d63ce2 DE |
11520 | for it, invalidating all copies of pointers into the previous |
11521 | contents. */ | |
80626a55 DE |
11522 | *dwo_file_slot = dwo_file; |
11523 | } | |
11524 | else | |
11525 | { | |
6f738b01 SM |
11526 | dwarf_read_debug_printf ("Using existing virtual DWO: %s", |
11527 | virtual_dwo_name.c_str ()); | |
11528 | ||
9a3c8263 | 11529 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
80626a55 | 11530 | } |
80626a55 | 11531 | |
976ca316 | 11532 | dwo_unit = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwo_unit); |
80626a55 DE |
11533 | dwo_unit->dwo_file = dwo_file; |
11534 | dwo_unit->signature = signature; | |
8d749320 | 11535 | dwo_unit->section = |
976ca316 | 11536 | XOBNEW (&per_objfile->per_bfd->obstack, struct dwarf2_section_info); |
8a0459fd | 11537 | *dwo_unit->section = sections.info_or_types; |
57d63ce2 | 11538 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
80626a55 DE |
11539 | |
11540 | return dwo_unit; | |
11541 | } | |
11542 | ||
d2854d8d CT |
11543 | /* Subroutine of create_dwo_unit_in_dwp_v2 and create_dwo_unit_in_dwp_v5 to |
11544 | simplify them. Given a pointer to the containing section SECTION, and | |
11545 | OFFSET,SIZE of the piece within that section used by a TU/CU, return a | |
11546 | virtual section of just that piece. */ | |
73869dc2 DE |
11547 | |
11548 | static struct dwarf2_section_info | |
d2854d8d CT |
11549 | create_dwp_v2_or_v5_section (dwarf2_per_objfile *per_objfile, |
11550 | struct dwarf2_section_info *section, | |
11551 | bfd_size_type offset, bfd_size_type size) | |
73869dc2 DE |
11552 | { |
11553 | struct dwarf2_section_info result; | |
11554 | asection *sectp; | |
11555 | ||
11556 | gdb_assert (section != NULL); | |
11557 | gdb_assert (!section->is_virtual); | |
11558 | ||
11559 | memset (&result, 0, sizeof (result)); | |
11560 | result.s.containing_section = section; | |
dc4ccb6f | 11561 | result.is_virtual = true; |
73869dc2 DE |
11562 | |
11563 | if (size == 0) | |
11564 | return result; | |
11565 | ||
96b79293 | 11566 | sectp = section->get_bfd_section (); |
73869dc2 DE |
11567 | |
11568 | /* Flag an error if the piece denoted by OFFSET,SIZE is outside the | |
11569 | bounds of the real section. This is a pretty-rare event, so just | |
11570 | flag an error (easier) instead of a warning and trying to cope. */ | |
11571 | if (sectp == NULL | |
fd361982 | 11572 | || offset + size > bfd_section_size (sectp)) |
73869dc2 | 11573 | { |
d2854d8d | 11574 | error (_("Dwarf Error: Bad DWP V2 or V5 section info, doesn't fit" |
73869dc2 | 11575 | " in section %s [in module %s]"), |
fd361982 | 11576 | sectp ? bfd_section_name (sectp) : "<unknown>", |
976ca316 | 11577 | objfile_name (per_objfile->objfile)); |
73869dc2 DE |
11578 | } |
11579 | ||
11580 | result.virtual_offset = offset; | |
11581 | result.size = size; | |
11582 | return result; | |
11583 | } | |
11584 | ||
11585 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11586 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11587 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11588 | This is for DWP version 2 files. */ | |
11589 | ||
11590 | static struct dwo_unit * | |
976ca316 | 11591 | create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11592 | struct dwp_file *dwp_file, |
73869dc2 DE |
11593 | uint32_t unit_index, |
11594 | const char *comp_dir, | |
11595 | ULONGEST signature, int is_debug_types) | |
11596 | { | |
73869dc2 DE |
11597 | const struct dwp_hash_table *dwp_htab = |
11598 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11599 | bfd *dbfd = dwp_file->dbfd.get (); |
73869dc2 DE |
11600 | const char *kind = is_debug_types ? "TU" : "CU"; |
11601 | struct dwo_file *dwo_file; | |
11602 | struct dwo_unit *dwo_unit; | |
d2854d8d | 11603 | struct virtual_v2_or_v5_dwo_sections sections; |
73869dc2 | 11604 | void **dwo_file_slot; |
73869dc2 DE |
11605 | int i; |
11606 | ||
11607 | gdb_assert (dwp_file->version == 2); | |
11608 | ||
6f738b01 SM |
11609 | dwarf_read_debug_printf ("Reading %s %s/%s in DWP V2 file: %s", |
11610 | kind, pulongest (unit_index), hex_string (signature), | |
11611 | dwp_file->name); | |
73869dc2 DE |
11612 | |
11613 | /* Fetch the section offsets of this DWO unit. */ | |
11614 | ||
11615 | memset (§ions, 0, sizeof (sections)); | |
73869dc2 DE |
11616 | |
11617 | for (i = 0; i < dwp_htab->nr_columns; ++i) | |
11618 | { | |
11619 | uint32_t offset = read_4_bytes (dbfd, | |
11620 | dwp_htab->section_pool.v2.offsets | |
11621 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11622 | + i) | |
11623 | * sizeof (uint32_t))); | |
11624 | uint32_t size = read_4_bytes (dbfd, | |
11625 | dwp_htab->section_pool.v2.sizes | |
11626 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11627 | + i) | |
11628 | * sizeof (uint32_t))); | |
11629 | ||
11630 | switch (dwp_htab->section_pool.v2.section_ids[i]) | |
11631 | { | |
11632 | case DW_SECT_INFO: | |
11633 | case DW_SECT_TYPES: | |
11634 | sections.info_or_types_offset = offset; | |
11635 | sections.info_or_types_size = size; | |
11636 | break; | |
11637 | case DW_SECT_ABBREV: | |
11638 | sections.abbrev_offset = offset; | |
11639 | sections.abbrev_size = size; | |
11640 | break; | |
11641 | case DW_SECT_LINE: | |
11642 | sections.line_offset = offset; | |
11643 | sections.line_size = size; | |
11644 | break; | |
11645 | case DW_SECT_LOC: | |
11646 | sections.loc_offset = offset; | |
11647 | sections.loc_size = size; | |
11648 | break; | |
11649 | case DW_SECT_STR_OFFSETS: | |
11650 | sections.str_offsets_offset = offset; | |
11651 | sections.str_offsets_size = size; | |
11652 | break; | |
11653 | case DW_SECT_MACINFO: | |
11654 | sections.macinfo_offset = offset; | |
11655 | sections.macinfo_size = size; | |
11656 | break; | |
11657 | case DW_SECT_MACRO: | |
11658 | sections.macro_offset = offset; | |
11659 | sections.macro_size = size; | |
11660 | break; | |
11661 | } | |
11662 | } | |
11663 | ||
11664 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11665 | have dwo_unit "live" in that. At least for now. | |
11666 | ||
11667 | The DWP file can be made up of a random collection of CUs and TUs. | |
11668 | However, for each CU + set of TUs that came from the same original DWO | |
11669 | file, we can combine them back into a virtual DWO file to save space | |
11670 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11671 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11672 | ||
791afaa2 TT |
11673 | std::string virtual_dwo_name = |
11674 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld", | |
11675 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), | |
11676 | (long) (sections.line_size ? sections.line_offset : 0), | |
11677 | (long) (sections.loc_size ? sections.loc_offset : 0), | |
11678 | (long) (sections.str_offsets_size | |
11679 | ? sections.str_offsets_offset : 0)); | |
73869dc2 | 11680 | /* Can we use an existing virtual DWO file? */ |
976ca316 | 11681 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, virtual_dwo_name.c_str (), |
ed2dc618 | 11682 | comp_dir); |
73869dc2 DE |
11683 | /* Create one if necessary. */ |
11684 | if (*dwo_file_slot == NULL) | |
11685 | { | |
6f738b01 SM |
11686 | dwarf_read_debug_printf ("Creating virtual DWO: %s", |
11687 | virtual_dwo_name.c_str ()); | |
11688 | ||
51ac9db5 | 11689 | dwo_file = new struct dwo_file; |
976ca316 | 11690 | dwo_file->dwo_name = per_objfile->objfile->intern (virtual_dwo_name); |
73869dc2 DE |
11691 | dwo_file->comp_dir = comp_dir; |
11692 | dwo_file->sections.abbrev = | |
d2854d8d CT |
11693 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.abbrev, |
11694 | sections.abbrev_offset, | |
11695 | sections.abbrev_size); | |
73869dc2 | 11696 | dwo_file->sections.line = |
d2854d8d CT |
11697 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.line, |
11698 | sections.line_offset, | |
11699 | sections.line_size); | |
73869dc2 | 11700 | dwo_file->sections.loc = |
d2854d8d CT |
11701 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.loc, |
11702 | sections.loc_offset, sections.loc_size); | |
73869dc2 | 11703 | dwo_file->sections.macinfo = |
d2854d8d CT |
11704 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.macinfo, |
11705 | sections.macinfo_offset, | |
11706 | sections.macinfo_size); | |
73869dc2 | 11707 | dwo_file->sections.macro = |
d2854d8d CT |
11708 | create_dwp_v2_or_v5_section (per_objfile, &dwp_file->sections.macro, |
11709 | sections.macro_offset, | |
11710 | sections.macro_size); | |
73869dc2 | 11711 | dwo_file->sections.str_offsets = |
d2854d8d CT |
11712 | create_dwp_v2_or_v5_section (per_objfile, |
11713 | &dwp_file->sections.str_offsets, | |
11714 | sections.str_offsets_offset, | |
11715 | sections.str_offsets_size); | |
73869dc2 DE |
11716 | /* The "str" section is global to the entire DWP file. */ |
11717 | dwo_file->sections.str = dwp_file->sections.str; | |
11718 | /* The info or types section is assigned below to dwo_unit, | |
11719 | there's no need to record it in dwo_file. | |
11720 | Also, we can't simply record type sections in dwo_file because | |
11721 | we record a pointer into the vector in dwo_unit. As we collect more | |
11722 | types we'll grow the vector and eventually have to reallocate space | |
11723 | for it, invalidating all copies of pointers into the previous | |
11724 | contents. */ | |
11725 | *dwo_file_slot = dwo_file; | |
11726 | } | |
11727 | else | |
11728 | { | |
6f738b01 SM |
11729 | dwarf_read_debug_printf ("Using existing virtual DWO: %s", |
11730 | virtual_dwo_name.c_str ()); | |
11731 | ||
9a3c8263 | 11732 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
73869dc2 | 11733 | } |
73869dc2 | 11734 | |
976ca316 | 11735 | dwo_unit = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwo_unit); |
73869dc2 DE |
11736 | dwo_unit->dwo_file = dwo_file; |
11737 | dwo_unit->signature = signature; | |
8d749320 | 11738 | dwo_unit->section = |
976ca316 | 11739 | XOBNEW (&per_objfile->per_bfd->obstack, struct dwarf2_section_info); |
d2854d8d | 11740 | *dwo_unit->section = create_dwp_v2_or_v5_section |
dda83cd7 | 11741 | (per_objfile, |
d2854d8d CT |
11742 | is_debug_types |
11743 | ? &dwp_file->sections.types | |
11744 | : &dwp_file->sections.info, | |
11745 | sections.info_or_types_offset, | |
11746 | sections.info_or_types_size); | |
11747 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ | |
11748 | ||
11749 | return dwo_unit; | |
11750 | } | |
11751 | ||
11752 | /* Create a dwo_unit object for the DWO unit with signature SIGNATURE. | |
11753 | UNIT_INDEX is the index of the DWO unit in the DWP hash table. | |
11754 | COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU. | |
11755 | This is for DWP version 5 files. */ | |
11756 | ||
11757 | static struct dwo_unit * | |
11758 | create_dwo_unit_in_dwp_v5 (dwarf2_per_objfile *per_objfile, | |
11759 | struct dwp_file *dwp_file, | |
11760 | uint32_t unit_index, | |
11761 | const char *comp_dir, | |
11762 | ULONGEST signature, int is_debug_types) | |
11763 | { | |
11764 | const struct dwp_hash_table *dwp_htab | |
11765 | = is_debug_types ? dwp_file->tus : dwp_file->cus; | |
11766 | bfd *dbfd = dwp_file->dbfd.get (); | |
11767 | const char *kind = is_debug_types ? "TU" : "CU"; | |
11768 | struct dwo_file *dwo_file; | |
11769 | struct dwo_unit *dwo_unit; | |
11770 | struct virtual_v2_or_v5_dwo_sections sections {}; | |
11771 | void **dwo_file_slot; | |
11772 | ||
11773 | gdb_assert (dwp_file->version == 5); | |
11774 | ||
6f738b01 SM |
11775 | dwarf_read_debug_printf ("Reading %s %s/%s in DWP V5 file: %s", |
11776 | kind, pulongest (unit_index), hex_string (signature), | |
11777 | dwp_file->name); | |
d2854d8d CT |
11778 | |
11779 | /* Fetch the section offsets of this DWO unit. */ | |
11780 | ||
11781 | /* memset (§ions, 0, sizeof (sections)); */ | |
11782 | ||
11783 | for (int i = 0; i < dwp_htab->nr_columns; ++i) | |
11784 | { | |
11785 | uint32_t offset = read_4_bytes (dbfd, | |
dda83cd7 SM |
11786 | dwp_htab->section_pool.v5.offsets |
11787 | + (((unit_index - 1) | |
11788 | * dwp_htab->nr_columns | |
11789 | + i) | |
11790 | * sizeof (uint32_t))); | |
d2854d8d | 11791 | uint32_t size = read_4_bytes (dbfd, |
dda83cd7 SM |
11792 | dwp_htab->section_pool.v5.sizes |
11793 | + (((unit_index - 1) * dwp_htab->nr_columns | |
11794 | + i) | |
11795 | * sizeof (uint32_t))); | |
d2854d8d CT |
11796 | |
11797 | switch (dwp_htab->section_pool.v5.section_ids[i]) | |
dda83cd7 SM |
11798 | { |
11799 | case DW_SECT_ABBREV_V5: | |
11800 | sections.abbrev_offset = offset; | |
11801 | sections.abbrev_size = size; | |
11802 | break; | |
11803 | case DW_SECT_INFO_V5: | |
11804 | sections.info_or_types_offset = offset; | |
11805 | sections.info_or_types_size = size; | |
11806 | break; | |
11807 | case DW_SECT_LINE_V5: | |
11808 | sections.line_offset = offset; | |
11809 | sections.line_size = size; | |
11810 | break; | |
11811 | case DW_SECT_LOCLISTS_V5: | |
11812 | sections.loclists_offset = offset; | |
11813 | sections.loclists_size = size; | |
11814 | break; | |
11815 | case DW_SECT_MACRO_V5: | |
11816 | sections.macro_offset = offset; | |
11817 | sections.macro_size = size; | |
11818 | break; | |
11819 | case DW_SECT_RNGLISTS_V5: | |
11820 | sections.rnglists_offset = offset; | |
11821 | sections.rnglists_size = size; | |
11822 | break; | |
11823 | case DW_SECT_STR_OFFSETS_V5: | |
11824 | sections.str_offsets_offset = offset; | |
11825 | sections.str_offsets_size = size; | |
11826 | break; | |
11827 | case DW_SECT_RESERVED_V5: | |
11828 | default: | |
11829 | break; | |
11830 | } | |
d2854d8d CT |
11831 | } |
11832 | ||
11833 | /* It's easier for the rest of the code if we fake a struct dwo_file and | |
11834 | have dwo_unit "live" in that. At least for now. | |
11835 | ||
11836 | The DWP file can be made up of a random collection of CUs and TUs. | |
11837 | However, for each CU + set of TUs that came from the same original DWO | |
11838 | file, we can combine them back into a virtual DWO file to save space | |
11839 | (fewer struct dwo_file objects to allocate). Remember that for really | |
11840 | large apps there can be on the order of 8K CUs and 200K TUs, or more. */ | |
11841 | ||
11842 | std::string virtual_dwo_name = | |
11843 | string_printf ("virtual-dwo/%ld-%ld-%ld-%ld-%ld-%ld", | |
dda83cd7 SM |
11844 | (long) (sections.abbrev_size ? sections.abbrev_offset : 0), |
11845 | (long) (sections.line_size ? sections.line_offset : 0), | |
11846 | (long) (sections.loclists_size ? sections.loclists_offset : 0), | |
11847 | (long) (sections.str_offsets_size | |
11848 | ? sections.str_offsets_offset : 0), | |
11849 | (long) (sections.macro_size ? sections.macro_offset : 0), | |
11850 | (long) (sections.rnglists_size ? sections.rnglists_offset: 0)); | |
d2854d8d CT |
11851 | /* Can we use an existing virtual DWO file? */ |
11852 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, | |
dda83cd7 SM |
11853 | virtual_dwo_name.c_str (), |
11854 | comp_dir); | |
d2854d8d CT |
11855 | /* Create one if necessary. */ |
11856 | if (*dwo_file_slot == NULL) | |
11857 | { | |
6f738b01 SM |
11858 | dwarf_read_debug_printf ("Creating virtual DWO: %s", |
11859 | virtual_dwo_name.c_str ()); | |
11860 | ||
d2854d8d CT |
11861 | dwo_file = new struct dwo_file; |
11862 | dwo_file->dwo_name = per_objfile->objfile->intern (virtual_dwo_name); | |
11863 | dwo_file->comp_dir = comp_dir; | |
11864 | dwo_file->sections.abbrev = | |
dda83cd7 SM |
11865 | create_dwp_v2_or_v5_section (per_objfile, |
11866 | &dwp_file->sections.abbrev, | |
11867 | sections.abbrev_offset, | |
11868 | sections.abbrev_size); | |
d2854d8d | 11869 | dwo_file->sections.line = |
dda83cd7 SM |
11870 | create_dwp_v2_or_v5_section (per_objfile, |
11871 | &dwp_file->sections.line, | |
11872 | sections.line_offset, sections.line_size); | |
d2854d8d | 11873 | dwo_file->sections.macro = |
dda83cd7 SM |
11874 | create_dwp_v2_or_v5_section (per_objfile, |
11875 | &dwp_file->sections.macro, | |
11876 | sections.macro_offset, | |
11877 | sections.macro_size); | |
d2854d8d | 11878 | dwo_file->sections.loclists = |
dda83cd7 SM |
11879 | create_dwp_v2_or_v5_section (per_objfile, |
11880 | &dwp_file->sections.loclists, | |
11881 | sections.loclists_offset, | |
11882 | sections.loclists_size); | |
d2854d8d | 11883 | dwo_file->sections.rnglists = |
dda83cd7 SM |
11884 | create_dwp_v2_or_v5_section (per_objfile, |
11885 | &dwp_file->sections.rnglists, | |
11886 | sections.rnglists_offset, | |
11887 | sections.rnglists_size); | |
d2854d8d | 11888 | dwo_file->sections.str_offsets = |
dda83cd7 SM |
11889 | create_dwp_v2_or_v5_section (per_objfile, |
11890 | &dwp_file->sections.str_offsets, | |
11891 | sections.str_offsets_offset, | |
11892 | sections.str_offsets_size); | |
d2854d8d CT |
11893 | /* The "str" section is global to the entire DWP file. */ |
11894 | dwo_file->sections.str = dwp_file->sections.str; | |
11895 | /* The info or types section is assigned below to dwo_unit, | |
dda83cd7 SM |
11896 | there's no need to record it in dwo_file. |
11897 | Also, we can't simply record type sections in dwo_file because | |
11898 | we record a pointer into the vector in dwo_unit. As we collect more | |
11899 | types we'll grow the vector and eventually have to reallocate space | |
11900 | for it, invalidating all copies of pointers into the previous | |
11901 | contents. */ | |
d2854d8d CT |
11902 | *dwo_file_slot = dwo_file; |
11903 | } | |
11904 | else | |
11905 | { | |
6f738b01 SM |
11906 | dwarf_read_debug_printf ("Using existing virtual DWO: %s", |
11907 | virtual_dwo_name.c_str ()); | |
11908 | ||
d2854d8d CT |
11909 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
11910 | } | |
11911 | ||
11912 | dwo_unit = OBSTACK_ZALLOC (&per_objfile->per_bfd->obstack, struct dwo_unit); | |
11913 | dwo_unit->dwo_file = dwo_file; | |
11914 | dwo_unit->signature = signature; | |
11915 | dwo_unit->section | |
11916 | = XOBNEW (&per_objfile->per_bfd->obstack, struct dwarf2_section_info); | |
11917 | *dwo_unit->section = create_dwp_v2_or_v5_section (per_objfile, | |
dda83cd7 SM |
11918 | &dwp_file->sections.info, |
11919 | sections.info_or_types_offset, | |
11920 | sections.info_or_types_size); | |
73869dc2 DE |
11921 | /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */ |
11922 | ||
11923 | return dwo_unit; | |
11924 | } | |
11925 | ||
57d63ce2 DE |
11926 | /* Lookup the DWO unit with SIGNATURE in DWP_FILE. |
11927 | Returns NULL if the signature isn't found. */ | |
80626a55 DE |
11928 | |
11929 | static struct dwo_unit * | |
976ca316 | 11930 | lookup_dwo_unit_in_dwp (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 11931 | struct dwp_file *dwp_file, const char *comp_dir, |
57d63ce2 | 11932 | ULONGEST signature, int is_debug_types) |
80626a55 | 11933 | { |
57d63ce2 DE |
11934 | const struct dwp_hash_table *dwp_htab = |
11935 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
400174b1 | 11936 | bfd *dbfd = dwp_file->dbfd.get (); |
57d63ce2 | 11937 | uint32_t mask = dwp_htab->nr_slots - 1; |
80626a55 DE |
11938 | uint32_t hash = signature & mask; |
11939 | uint32_t hash2 = ((signature >> 32) & mask) | 1; | |
11940 | unsigned int i; | |
11941 | void **slot; | |
870f88f7 | 11942 | struct dwo_unit find_dwo_cu; |
80626a55 DE |
11943 | |
11944 | memset (&find_dwo_cu, 0, sizeof (find_dwo_cu)); | |
11945 | find_dwo_cu.signature = signature; | |
19ac8c2e | 11946 | slot = htab_find_slot (is_debug_types |
48b490f2 TT |
11947 | ? dwp_file->loaded_tus.get () |
11948 | : dwp_file->loaded_cus.get (), | |
19ac8c2e | 11949 | &find_dwo_cu, INSERT); |
80626a55 DE |
11950 | |
11951 | if (*slot != NULL) | |
9a3c8263 | 11952 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11953 | |
11954 | /* Use a for loop so that we don't loop forever on bad debug info. */ | |
57d63ce2 | 11955 | for (i = 0; i < dwp_htab->nr_slots; ++i) |
80626a55 DE |
11956 | { |
11957 | ULONGEST signature_in_table; | |
11958 | ||
11959 | signature_in_table = | |
57d63ce2 | 11960 | read_8_bytes (dbfd, dwp_htab->hash_table + hash * sizeof (uint64_t)); |
80626a55 DE |
11961 | if (signature_in_table == signature) |
11962 | { | |
57d63ce2 DE |
11963 | uint32_t unit_index = |
11964 | read_4_bytes (dbfd, | |
11965 | dwp_htab->unit_table + hash * sizeof (uint32_t)); | |
80626a55 | 11966 | |
73869dc2 DE |
11967 | if (dwp_file->version == 1) |
11968 | { | |
976ca316 SM |
11969 | *slot = create_dwo_unit_in_dwp_v1 (per_objfile, dwp_file, |
11970 | unit_index, comp_dir, | |
11971 | signature, is_debug_types); | |
73869dc2 | 11972 | } |
d2854d8d | 11973 | else if (dwp_file->version == 2) |
73869dc2 | 11974 | { |
976ca316 SM |
11975 | *slot = create_dwo_unit_in_dwp_v2 (per_objfile, dwp_file, |
11976 | unit_index, comp_dir, | |
11977 | signature, is_debug_types); | |
73869dc2 | 11978 | } |
d2854d8d CT |
11979 | else /* version == 5 */ |
11980 | { | |
11981 | *slot = create_dwo_unit_in_dwp_v5 (per_objfile, dwp_file, | |
11982 | unit_index, comp_dir, | |
11983 | signature, is_debug_types); | |
11984 | } | |
9a3c8263 | 11985 | return (struct dwo_unit *) *slot; |
80626a55 DE |
11986 | } |
11987 | if (signature_in_table == 0) | |
11988 | return NULL; | |
11989 | hash = (hash + hash2) & mask; | |
11990 | } | |
11991 | ||
11992 | error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate" | |
11993 | " [in module %s]"), | |
11994 | dwp_file->name); | |
11995 | } | |
11996 | ||
ab5088bf | 11997 | /* Subroutine of open_dwo_file,open_dwp_file to simplify them. |
3019eac3 DE |
11998 | Open the file specified by FILE_NAME and hand it off to BFD for |
11999 | preliminary analysis. Return a newly initialized bfd *, which | |
12000 | includes a canonicalized copy of FILE_NAME. | |
80626a55 | 12001 | If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file. |
6ac97d4c DE |
12002 | SEARCH_CWD is true if the current directory is to be searched. |
12003 | It will be searched before debug-file-directory. | |
13aaf454 DE |
12004 | If successful, the file is added to the bfd include table of the |
12005 | objfile's bfd (see gdb_bfd_record_inclusion). | |
6ac97d4c | 12006 | If unable to find/open the file, return NULL. |
3019eac3 DE |
12007 | NOTE: This function is derived from symfile_bfd_open. */ |
12008 | ||
192b62ce | 12009 | static gdb_bfd_ref_ptr |
976ca316 | 12010 | try_open_dwop_file (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 12011 | const char *file_name, int is_dwp, int search_cwd) |
3019eac3 | 12012 | { |
24b9144d | 12013 | int desc; |
9c02c129 DE |
12014 | /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if |
12015 | FILE_NAME contains a '/'. So we can't use it. Instead prepend "." | |
12016 | to debug_file_directory. */ | |
e0cc99a6 | 12017 | const char *search_path; |
9c02c129 DE |
12018 | static const char dirname_separator_string[] = { DIRNAME_SEPARATOR, '\0' }; |
12019 | ||
e0cc99a6 | 12020 | gdb::unique_xmalloc_ptr<char> search_path_holder; |
6ac97d4c DE |
12021 | if (search_cwd) |
12022 | { | |
12023 | if (*debug_file_directory != '\0') | |
e0cc99a6 TT |
12024 | { |
12025 | search_path_holder.reset (concat (".", dirname_separator_string, | |
12026 | debug_file_directory, | |
12027 | (char *) NULL)); | |
12028 | search_path = search_path_holder.get (); | |
12029 | } | |
6ac97d4c | 12030 | else |
e0cc99a6 | 12031 | search_path = "."; |
6ac97d4c | 12032 | } |
9c02c129 | 12033 | else |
e0cc99a6 | 12034 | search_path = debug_file_directory; |
3019eac3 | 12035 | |
56d467f4 CT |
12036 | /* Add the path for the executable binary to the list of search paths. */ |
12037 | std::string objfile_dir = ldirname (objfile_name (per_objfile->objfile)); | |
12038 | search_path_holder.reset (concat (objfile_dir.c_str (), | |
12039 | dirname_separator_string, | |
12040 | search_path, nullptr)); | |
12041 | search_path = search_path_holder.get (); | |
12042 | ||
24b9144d | 12043 | openp_flags flags = OPF_RETURN_REALPATH; |
80626a55 DE |
12044 | if (is_dwp) |
12045 | flags |= OPF_SEARCH_IN_PATH; | |
e0cc99a6 TT |
12046 | |
12047 | gdb::unique_xmalloc_ptr<char> absolute_name; | |
9c02c129 | 12048 | desc = openp (search_path, flags, file_name, |
3019eac3 DE |
12049 | O_RDONLY | O_BINARY, &absolute_name); |
12050 | if (desc < 0) | |
12051 | return NULL; | |
12052 | ||
e0cc99a6 TT |
12053 | gdb_bfd_ref_ptr sym_bfd (gdb_bfd_open (absolute_name.get (), |
12054 | gnutarget, desc)); | |
9c02c129 DE |
12055 | if (sym_bfd == NULL) |
12056 | return NULL; | |
192b62ce | 12057 | bfd_set_cacheable (sym_bfd.get (), 1); |
3019eac3 | 12058 | |
192b62ce TT |
12059 | if (!bfd_check_format (sym_bfd.get (), bfd_object)) |
12060 | return NULL; | |
3019eac3 | 12061 | |
13aaf454 DE |
12062 | /* Success. Record the bfd as having been included by the objfile's bfd. |
12063 | This is important because things like demangled_names_hash lives in the | |
12064 | objfile's per_bfd space and may have references to things like symbol | |
12065 | names that live in the DWO/DWP file's per_bfd space. PR 16426. */ | |
976ca316 | 12066 | gdb_bfd_record_inclusion (per_objfile->objfile->obfd, sym_bfd.get ()); |
13aaf454 | 12067 | |
3019eac3 DE |
12068 | return sym_bfd; |
12069 | } | |
12070 | ||
ab5088bf | 12071 | /* Try to open DWO file FILE_NAME. |
3019eac3 DE |
12072 | COMP_DIR is the DW_AT_comp_dir attribute. |
12073 | The result is the bfd handle of the file. | |
12074 | If there is a problem finding or opening the file, return NULL. | |
12075 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12076 | same as symfile_bfd_open. */ | |
12077 | ||
192b62ce | 12078 | static gdb_bfd_ref_ptr |
976ca316 | 12079 | open_dwo_file (dwarf2_per_objfile *per_objfile, |
ed2dc618 | 12080 | const char *file_name, const char *comp_dir) |
3019eac3 | 12081 | { |
80626a55 | 12082 | if (IS_ABSOLUTE_PATH (file_name)) |
976ca316 | 12083 | return try_open_dwop_file (per_objfile, file_name, |
ed2dc618 | 12084 | 0 /*is_dwp*/, 0 /*search_cwd*/); |
3019eac3 DE |
12085 | |
12086 | /* Before trying the search path, try DWO_NAME in COMP_DIR. */ | |
12087 | ||
12088 | if (comp_dir != NULL) | |
12089 | { | |
43816ebc TT |
12090 | gdb::unique_xmalloc_ptr<char> path_to_try |
12091 | (concat (comp_dir, SLASH_STRING, file_name, (char *) NULL)); | |
3019eac3 DE |
12092 | |
12093 | /* NOTE: If comp_dir is a relative path, this will also try the | |
12094 | search path, which seems useful. */ | |
976ca316 | 12095 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (per_objfile, path_to_try.get (), |
ed2dc618 | 12096 | 0 /*is_dwp*/, |
192b62ce | 12097 | 1 /*search_cwd*/)); |
3019eac3 DE |
12098 | if (abfd != NULL) |
12099 | return abfd; | |
12100 | } | |
12101 | ||
12102 | /* That didn't work, try debug-file-directory, which, despite its name, | |
12103 | is a list of paths. */ | |
12104 | ||
12105 | if (*debug_file_directory == '\0') | |
12106 | return NULL; | |
12107 | ||
976ca316 | 12108 | return try_open_dwop_file (per_objfile, file_name, |
ed2dc618 | 12109 | 0 /*is_dwp*/, 1 /*search_cwd*/); |
3019eac3 DE |
12110 | } |
12111 | ||
80626a55 DE |
12112 | /* This function is mapped across the sections and remembers the offset and |
12113 | size of each of the DWO debugging sections we are interested in. */ | |
12114 | ||
12115 | static void | |
5bb6e9dd TT |
12116 | dwarf2_locate_dwo_sections (bfd *abfd, asection *sectp, |
12117 | dwo_sections *dwo_sections) | |
80626a55 | 12118 | { |
80626a55 DE |
12119 | const struct dwop_section_names *names = &dwop_section_names; |
12120 | ||
fbedd546 | 12121 | if (names->abbrev_dwo.matches (sectp->name)) |
80626a55 | 12122 | { |
049412e3 | 12123 | dwo_sections->abbrev.s.section = sectp; |
fd361982 | 12124 | dwo_sections->abbrev.size = bfd_section_size (sectp); |
80626a55 | 12125 | } |
fbedd546 | 12126 | else if (names->info_dwo.matches (sectp->name)) |
80626a55 | 12127 | { |
049412e3 | 12128 | dwo_sections->info.s.section = sectp; |
fd361982 | 12129 | dwo_sections->info.size = bfd_section_size (sectp); |
80626a55 | 12130 | } |
fbedd546 | 12131 | else if (names->line_dwo.matches (sectp->name)) |
80626a55 | 12132 | { |
049412e3 | 12133 | dwo_sections->line.s.section = sectp; |
fd361982 | 12134 | dwo_sections->line.size = bfd_section_size (sectp); |
80626a55 | 12135 | } |
fbedd546 | 12136 | else if (names->loc_dwo.matches (sectp->name)) |
80626a55 | 12137 | { |
049412e3 | 12138 | dwo_sections->loc.s.section = sectp; |
fd361982 | 12139 | dwo_sections->loc.size = bfd_section_size (sectp); |
80626a55 | 12140 | } |
fbedd546 | 12141 | else if (names->loclists_dwo.matches (sectp->name)) |
41144253 | 12142 | { |
12143 | dwo_sections->loclists.s.section = sectp; | |
12144 | dwo_sections->loclists.size = bfd_section_size (sectp); | |
12145 | } | |
fbedd546 | 12146 | else if (names->macinfo_dwo.matches (sectp->name)) |
80626a55 | 12147 | { |
049412e3 | 12148 | dwo_sections->macinfo.s.section = sectp; |
fd361982 | 12149 | dwo_sections->macinfo.size = bfd_section_size (sectp); |
80626a55 | 12150 | } |
fbedd546 | 12151 | else if (names->macro_dwo.matches (sectp->name)) |
80626a55 | 12152 | { |
049412e3 | 12153 | dwo_sections->macro.s.section = sectp; |
fd361982 | 12154 | dwo_sections->macro.size = bfd_section_size (sectp); |
80626a55 | 12155 | } |
fbedd546 | 12156 | else if (names->rnglists_dwo.matches (sectp->name)) |
d0ce17d8 CT |
12157 | { |
12158 | dwo_sections->rnglists.s.section = sectp; | |
12159 | dwo_sections->rnglists.size = bfd_section_size (sectp); | |
12160 | } | |
fbedd546 | 12161 | else if (names->str_dwo.matches (sectp->name)) |
80626a55 | 12162 | { |
049412e3 | 12163 | dwo_sections->str.s.section = sectp; |
fd361982 | 12164 | dwo_sections->str.size = bfd_section_size (sectp); |
80626a55 | 12165 | } |
fbedd546 | 12166 | else if (names->str_offsets_dwo.matches (sectp->name)) |
80626a55 | 12167 | { |
049412e3 | 12168 | dwo_sections->str_offsets.s.section = sectp; |
fd361982 | 12169 | dwo_sections->str_offsets.size = bfd_section_size (sectp); |
80626a55 | 12170 | } |
fbedd546 | 12171 | else if (names->types_dwo.matches (sectp->name)) |
80626a55 DE |
12172 | { |
12173 | struct dwarf2_section_info type_section; | |
12174 | ||
12175 | memset (&type_section, 0, sizeof (type_section)); | |
049412e3 | 12176 | type_section.s.section = sectp; |
fd361982 | 12177 | type_section.size = bfd_section_size (sectp); |
fd5866f6 | 12178 | dwo_sections->types.push_back (type_section); |
80626a55 DE |
12179 | } |
12180 | } | |
12181 | ||
ab5088bf | 12182 | /* Initialize the use of the DWO file specified by DWO_NAME and referenced |
19c3d4c9 | 12183 | by PER_CU. This is for the non-DWP case. |
80626a55 | 12184 | The result is NULL if DWO_NAME can't be found. */ |
3019eac3 DE |
12185 | |
12186 | static struct dwo_file * | |
4ab09049 SM |
12187 | open_and_init_dwo_file (dwarf2_cu *cu, const char *dwo_name, |
12188 | const char *comp_dir) | |
3019eac3 | 12189 | { |
976ca316 | 12190 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
3019eac3 | 12191 | |
976ca316 | 12192 | gdb_bfd_ref_ptr dbfd = open_dwo_file (per_objfile, dwo_name, comp_dir); |
80626a55 DE |
12193 | if (dbfd == NULL) |
12194 | { | |
6f738b01 SM |
12195 | dwarf_read_debug_printf ("DWO file not found: %s", dwo_name); |
12196 | ||
80626a55 DE |
12197 | return NULL; |
12198 | } | |
263db9a1 | 12199 | |
51ac9db5 | 12200 | dwo_file_up dwo_file (new struct dwo_file); |
0ac5b59e DE |
12201 | dwo_file->dwo_name = dwo_name; |
12202 | dwo_file->comp_dir = comp_dir; | |
fb1eb2f9 | 12203 | dwo_file->dbfd = std::move (dbfd); |
3019eac3 | 12204 | |
5bb6e9dd TT |
12205 | for (asection *sec : gdb_bfd_sections (dwo_file->dbfd)) |
12206 | dwarf2_locate_dwo_sections (dwo_file->dbfd.get (), sec, | |
12207 | &dwo_file->sections); | |
3019eac3 | 12208 | |
976ca316 SM |
12209 | create_cus_hash_table (per_objfile, cu, *dwo_file, dwo_file->sections.info, |
12210 | dwo_file->cus); | |
3019eac3 | 12211 | |
d2854d8d CT |
12212 | if (cu->per_cu->dwarf_version < 5) |
12213 | { | |
12214 | create_debug_types_hash_table (per_objfile, dwo_file.get (), | |
12215 | dwo_file->sections.types, dwo_file->tus); | |
12216 | } | |
12217 | else | |
12218 | { | |
12219 | create_debug_type_hash_table (per_objfile, dwo_file.get (), | |
12220 | &dwo_file->sections.info, dwo_file->tus, | |
30c80d88 | 12221 | rcuh_kind::COMPILE); |
d2854d8d | 12222 | } |
3019eac3 | 12223 | |
6f738b01 | 12224 | dwarf_read_debug_printf ("DWO file found: %s", dwo_name); |
80626a55 | 12225 | |
263db9a1 | 12226 | return dwo_file.release (); |
3019eac3 DE |
12227 | } |
12228 | ||
80626a55 | 12229 | /* This function is mapped across the sections and remembers the offset and |
73869dc2 DE |
12230 | size of each of the DWP debugging sections common to version 1 and 2 that |
12231 | we are interested in. */ | |
3019eac3 | 12232 | |
80626a55 | 12233 | static void |
73869dc2 | 12234 | dwarf2_locate_common_dwp_sections (bfd *abfd, asection *sectp, |
5bb6e9dd | 12235 | dwp_file *dwp_file) |
3019eac3 | 12236 | { |
80626a55 DE |
12237 | const struct dwop_section_names *names = &dwop_section_names; |
12238 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
3019eac3 | 12239 | |
80626a55 | 12240 | /* Record the ELF section number for later lookup: this is what the |
73869dc2 | 12241 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ |
80626a55 DE |
12242 | gdb_assert (elf_section_nr < dwp_file->num_sections); |
12243 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
3019eac3 | 12244 | |
80626a55 | 12245 | /* Look for specific sections that we need. */ |
fbedd546 | 12246 | if (names->str_dwo.matches (sectp->name)) |
80626a55 | 12247 | { |
049412e3 | 12248 | dwp_file->sections.str.s.section = sectp; |
fd361982 | 12249 | dwp_file->sections.str.size = bfd_section_size (sectp); |
80626a55 | 12250 | } |
fbedd546 | 12251 | else if (names->cu_index.matches (sectp->name)) |
80626a55 | 12252 | { |
049412e3 | 12253 | dwp_file->sections.cu_index.s.section = sectp; |
fd361982 | 12254 | dwp_file->sections.cu_index.size = bfd_section_size (sectp); |
80626a55 | 12255 | } |
fbedd546 | 12256 | else if (names->tu_index.matches (sectp->name)) |
80626a55 | 12257 | { |
049412e3 | 12258 | dwp_file->sections.tu_index.s.section = sectp; |
fd361982 | 12259 | dwp_file->sections.tu_index.size = bfd_section_size (sectp); |
80626a55 DE |
12260 | } |
12261 | } | |
3019eac3 | 12262 | |
73869dc2 DE |
12263 | /* This function is mapped across the sections and remembers the offset and |
12264 | size of each of the DWP version 2 debugging sections that we are interested | |
12265 | in. This is split into a separate function because we don't know if we | |
d2854d8d | 12266 | have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */ |
73869dc2 DE |
12267 | |
12268 | static void | |
12269 | dwarf2_locate_v2_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12270 | { | |
9a3c8263 | 12271 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; |
73869dc2 DE |
12272 | const struct dwop_section_names *names = &dwop_section_names; |
12273 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12274 | ||
12275 | /* Record the ELF section number for later lookup: this is what the | |
12276 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12277 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12278 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12279 | ||
12280 | /* Look for specific sections that we need. */ | |
fbedd546 | 12281 | if (names->abbrev_dwo.matches (sectp->name)) |
73869dc2 | 12282 | { |
049412e3 | 12283 | dwp_file->sections.abbrev.s.section = sectp; |
fd361982 | 12284 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); |
73869dc2 | 12285 | } |
fbedd546 | 12286 | else if (names->info_dwo.matches (sectp->name)) |
73869dc2 | 12287 | { |
049412e3 | 12288 | dwp_file->sections.info.s.section = sectp; |
fd361982 | 12289 | dwp_file->sections.info.size = bfd_section_size (sectp); |
73869dc2 | 12290 | } |
fbedd546 | 12291 | else if (names->line_dwo.matches (sectp->name)) |
73869dc2 | 12292 | { |
049412e3 | 12293 | dwp_file->sections.line.s.section = sectp; |
fd361982 | 12294 | dwp_file->sections.line.size = bfd_section_size (sectp); |
73869dc2 | 12295 | } |
fbedd546 | 12296 | else if (names->loc_dwo.matches (sectp->name)) |
73869dc2 | 12297 | { |
049412e3 | 12298 | dwp_file->sections.loc.s.section = sectp; |
fd361982 | 12299 | dwp_file->sections.loc.size = bfd_section_size (sectp); |
73869dc2 | 12300 | } |
fbedd546 | 12301 | else if (names->macinfo_dwo.matches (sectp->name)) |
73869dc2 | 12302 | { |
049412e3 | 12303 | dwp_file->sections.macinfo.s.section = sectp; |
fd361982 | 12304 | dwp_file->sections.macinfo.size = bfd_section_size (sectp); |
73869dc2 | 12305 | } |
fbedd546 | 12306 | else if (names->macro_dwo.matches (sectp->name)) |
73869dc2 | 12307 | { |
049412e3 | 12308 | dwp_file->sections.macro.s.section = sectp; |
fd361982 | 12309 | dwp_file->sections.macro.size = bfd_section_size (sectp); |
73869dc2 | 12310 | } |
fbedd546 | 12311 | else if (names->str_offsets_dwo.matches (sectp->name)) |
73869dc2 | 12312 | { |
049412e3 | 12313 | dwp_file->sections.str_offsets.s.section = sectp; |
fd361982 | 12314 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); |
73869dc2 | 12315 | } |
fbedd546 | 12316 | else if (names->types_dwo.matches (sectp->name)) |
73869dc2 | 12317 | { |
049412e3 | 12318 | dwp_file->sections.types.s.section = sectp; |
fd361982 | 12319 | dwp_file->sections.types.size = bfd_section_size (sectp); |
73869dc2 DE |
12320 | } |
12321 | } | |
12322 | ||
d2854d8d CT |
12323 | /* This function is mapped across the sections and remembers the offset and |
12324 | size of each of the DWP version 5 debugging sections that we are interested | |
12325 | in. This is split into a separate function because we don't know if we | |
12326 | have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */ | |
12327 | ||
12328 | static void | |
12329 | dwarf2_locate_v5_dwp_sections (bfd *abfd, asection *sectp, void *dwp_file_ptr) | |
12330 | { | |
12331 | struct dwp_file *dwp_file = (struct dwp_file *) dwp_file_ptr; | |
12332 | const struct dwop_section_names *names = &dwop_section_names; | |
12333 | unsigned int elf_section_nr = elf_section_data (sectp)->this_idx; | |
12334 | ||
12335 | /* Record the ELF section number for later lookup: this is what the | |
12336 | .debug_cu_index,.debug_tu_index tables use in DWP V1. */ | |
12337 | gdb_assert (elf_section_nr < dwp_file->num_sections); | |
12338 | dwp_file->elf_sections[elf_section_nr] = sectp; | |
12339 | ||
12340 | /* Look for specific sections that we need. */ | |
fbedd546 | 12341 | if (names->abbrev_dwo.matches (sectp->name)) |
d2854d8d CT |
12342 | { |
12343 | dwp_file->sections.abbrev.s.section = sectp; | |
12344 | dwp_file->sections.abbrev.size = bfd_section_size (sectp); | |
12345 | } | |
fbedd546 | 12346 | else if (names->info_dwo.matches (sectp->name)) |
d2854d8d CT |
12347 | { |
12348 | dwp_file->sections.info.s.section = sectp; | |
12349 | dwp_file->sections.info.size = bfd_section_size (sectp); | |
12350 | } | |
fbedd546 | 12351 | else if (names->line_dwo.matches (sectp->name)) |
d2854d8d CT |
12352 | { |
12353 | dwp_file->sections.line.s.section = sectp; | |
12354 | dwp_file->sections.line.size = bfd_section_size (sectp); | |
12355 | } | |
fbedd546 | 12356 | else if (names->loclists_dwo.matches (sectp->name)) |
d2854d8d CT |
12357 | { |
12358 | dwp_file->sections.loclists.s.section = sectp; | |
12359 | dwp_file->sections.loclists.size = bfd_section_size (sectp); | |
12360 | } | |
fbedd546 | 12361 | else if (names->macro_dwo.matches (sectp->name)) |
d2854d8d CT |
12362 | { |
12363 | dwp_file->sections.macro.s.section = sectp; | |
12364 | dwp_file->sections.macro.size = bfd_section_size (sectp); | |
12365 | } | |
fbedd546 | 12366 | else if (names->rnglists_dwo.matches (sectp->name)) |
d2854d8d CT |
12367 | { |
12368 | dwp_file->sections.rnglists.s.section = sectp; | |
12369 | dwp_file->sections.rnglists.size = bfd_section_size (sectp); | |
12370 | } | |
fbedd546 | 12371 | else if (names->str_offsets_dwo.matches (sectp->name)) |
d2854d8d CT |
12372 | { |
12373 | dwp_file->sections.str_offsets.s.section = sectp; | |
12374 | dwp_file->sections.str_offsets.size = bfd_section_size (sectp); | |
12375 | } | |
12376 | } | |
12377 | ||
80626a55 | 12378 | /* Hash function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12379 | |
80626a55 DE |
12380 | static hashval_t |
12381 | hash_dwp_loaded_cutus (const void *item) | |
12382 | { | |
9a3c8263 | 12383 | const struct dwo_unit *dwo_unit = (const struct dwo_unit *) item; |
3019eac3 | 12384 | |
80626a55 DE |
12385 | /* This drops the top 32 bits of the signature, but is ok for a hash. */ |
12386 | return dwo_unit->signature; | |
3019eac3 DE |
12387 | } |
12388 | ||
80626a55 | 12389 | /* Equality function for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12390 | |
80626a55 DE |
12391 | static int |
12392 | eq_dwp_loaded_cutus (const void *a, const void *b) | |
3019eac3 | 12393 | { |
9a3c8263 SM |
12394 | const struct dwo_unit *dua = (const struct dwo_unit *) a; |
12395 | const struct dwo_unit *dub = (const struct dwo_unit *) b; | |
3019eac3 | 12396 | |
80626a55 DE |
12397 | return dua->signature == dub->signature; |
12398 | } | |
3019eac3 | 12399 | |
80626a55 | 12400 | /* Allocate a hash table for dwp_file loaded CUs/TUs. */ |
3019eac3 | 12401 | |
48b490f2 | 12402 | static htab_up |
298e9637 | 12403 | allocate_dwp_loaded_cutus_table () |
80626a55 | 12404 | { |
48b490f2 TT |
12405 | return htab_up (htab_create_alloc (3, |
12406 | hash_dwp_loaded_cutus, | |
12407 | eq_dwp_loaded_cutus, | |
12408 | NULL, xcalloc, xfree)); | |
80626a55 | 12409 | } |
3019eac3 | 12410 | |
ab5088bf DE |
12411 | /* Try to open DWP file FILE_NAME. |
12412 | The result is the bfd handle of the file. | |
12413 | If there is a problem finding or opening the file, return NULL. | |
12414 | Upon success, the canonicalized path of the file is stored in the bfd, | |
12415 | same as symfile_bfd_open. */ | |
12416 | ||
192b62ce | 12417 | static gdb_bfd_ref_ptr |
976ca316 | 12418 | open_dwp_file (dwarf2_per_objfile *per_objfile, const char *file_name) |
ab5088bf | 12419 | { |
976ca316 | 12420 | gdb_bfd_ref_ptr abfd (try_open_dwop_file (per_objfile, file_name, |
ed2dc618 | 12421 | 1 /*is_dwp*/, |
192b62ce | 12422 | 1 /*search_cwd*/)); |
6ac97d4c DE |
12423 | if (abfd != NULL) |
12424 | return abfd; | |
12425 | ||
12426 | /* Work around upstream bug 15652. | |
12427 | http://sourceware.org/bugzilla/show_bug.cgi?id=15652 | |
12428 | [Whether that's a "bug" is debatable, but it is getting in our way.] | |
12429 | We have no real idea where the dwp file is, because gdb's realpath-ing | |
12430 | of the executable's path may have discarded the needed info. | |
12431 | [IWBN if the dwp file name was recorded in the executable, akin to | |
12432 | .gnu_debuglink, but that doesn't exist yet.] | |
12433 | Strip the directory from FILE_NAME and search again. */ | |
12434 | if (*debug_file_directory != '\0') | |
12435 | { | |
12436 | /* Don't implicitly search the current directory here. | |
12437 | If the user wants to search "." to handle this case, | |
12438 | it must be added to debug-file-directory. */ | |
976ca316 SM |
12439 | return try_open_dwop_file (per_objfile, lbasename (file_name), |
12440 | 1 /*is_dwp*/, | |
6ac97d4c DE |
12441 | 0 /*search_cwd*/); |
12442 | } | |
12443 | ||
12444 | return NULL; | |
ab5088bf DE |
12445 | } |
12446 | ||
80626a55 DE |
12447 | /* Initialize the use of the DWP file for the current objfile. |
12448 | By convention the name of the DWP file is ${objfile}.dwp. | |
12449 | The result is NULL if it can't be found. */ | |
a766d390 | 12450 | |
400174b1 | 12451 | static std::unique_ptr<struct dwp_file> |
976ca316 | 12452 | open_and_init_dwp_file (dwarf2_per_objfile *per_objfile) |
80626a55 | 12453 | { |
976ca316 | 12454 | struct objfile *objfile = per_objfile->objfile; |
80626a55 | 12455 | |
82bf32bc JK |
12456 | /* Try to find first .dwp for the binary file before any symbolic links |
12457 | resolving. */ | |
6c447423 DE |
12458 | |
12459 | /* If the objfile is a debug file, find the name of the real binary | |
12460 | file and get the name of dwp file from there. */ | |
d721ba37 | 12461 | std::string dwp_name; |
6c447423 DE |
12462 | if (objfile->separate_debug_objfile_backlink != NULL) |
12463 | { | |
12464 | struct objfile *backlink = objfile->separate_debug_objfile_backlink; | |
12465 | const char *backlink_basename = lbasename (backlink->original_name); | |
6c447423 | 12466 | |
d721ba37 | 12467 | dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename; |
6c447423 DE |
12468 | } |
12469 | else | |
d721ba37 PA |
12470 | dwp_name = objfile->original_name; |
12471 | ||
12472 | dwp_name += ".dwp"; | |
80626a55 | 12473 | |
976ca316 | 12474 | gdb_bfd_ref_ptr dbfd (open_dwp_file (per_objfile, dwp_name.c_str ())); |
82bf32bc JK |
12475 | if (dbfd == NULL |
12476 | && strcmp (objfile->original_name, objfile_name (objfile)) != 0) | |
12477 | { | |
12478 | /* Try to find .dwp for the binary file after gdb_realpath resolving. */ | |
d721ba37 PA |
12479 | dwp_name = objfile_name (objfile); |
12480 | dwp_name += ".dwp"; | |
976ca316 | 12481 | dbfd = open_dwp_file (per_objfile, dwp_name.c_str ()); |
82bf32bc JK |
12482 | } |
12483 | ||
80626a55 DE |
12484 | if (dbfd == NULL) |
12485 | { | |
6f738b01 SM |
12486 | dwarf_read_debug_printf ("DWP file not found: %s", dwp_name.c_str ()); |
12487 | ||
400174b1 | 12488 | return std::unique_ptr<dwp_file> (); |
3019eac3 | 12489 | } |
400174b1 TT |
12490 | |
12491 | const char *name = bfd_get_filename (dbfd.get ()); | |
12492 | std::unique_ptr<struct dwp_file> dwp_file | |
12493 | (new struct dwp_file (name, std::move (dbfd))); | |
c906108c | 12494 | |
0a0f4c01 | 12495 | dwp_file->num_sections = elf_numsections (dwp_file->dbfd); |
80626a55 | 12496 | dwp_file->elf_sections = |
976ca316 | 12497 | OBSTACK_CALLOC (&per_objfile->per_bfd->obstack, |
80626a55 DE |
12498 | dwp_file->num_sections, asection *); |
12499 | ||
5bb6e9dd TT |
12500 | for (asection *sec : gdb_bfd_sections (dwp_file->dbfd)) |
12501 | dwarf2_locate_common_dwp_sections (dwp_file->dbfd.get (), sec, | |
12502 | dwp_file.get ()); | |
80626a55 | 12503 | |
976ca316 | 12504 | dwp_file->cus = create_dwp_hash_table (per_objfile, dwp_file.get (), 0); |
80626a55 | 12505 | |
976ca316 | 12506 | dwp_file->tus = create_dwp_hash_table (per_objfile, dwp_file.get (), 1); |
80626a55 | 12507 | |
73869dc2 | 12508 | /* The DWP file version is stored in the hash table. Oh well. */ |
08302ed2 DE |
12509 | if (dwp_file->cus && dwp_file->tus |
12510 | && dwp_file->cus->version != dwp_file->tus->version) | |
73869dc2 DE |
12511 | { |
12512 | /* Technically speaking, we should try to limp along, but this is | |
fbcbc3fd | 12513 | pretty bizarre. We use pulongest here because that's the established |
4d65956b | 12514 | portability solution (e.g, we cannot use %u for uint32_t). */ |
fbcbc3fd DE |
12515 | error (_("Dwarf Error: DWP file CU version %s doesn't match" |
12516 | " TU version %s [in DWP file %s]"), | |
12517 | pulongest (dwp_file->cus->version), | |
d721ba37 | 12518 | pulongest (dwp_file->tus->version), dwp_name.c_str ()); |
73869dc2 | 12519 | } |
08302ed2 DE |
12520 | |
12521 | if (dwp_file->cus) | |
12522 | dwp_file->version = dwp_file->cus->version; | |
12523 | else if (dwp_file->tus) | |
12524 | dwp_file->version = dwp_file->tus->version; | |
12525 | else | |
12526 | dwp_file->version = 2; | |
73869dc2 | 12527 | |
5bb6e9dd TT |
12528 | for (asection *sec : gdb_bfd_sections (dwp_file->dbfd)) |
12529 | { | |
12530 | if (dwp_file->version == 2) | |
12531 | dwarf2_locate_v2_dwp_sections (dwp_file->dbfd.get (), sec, | |
12532 | dwp_file.get ()); | |
12533 | else | |
12534 | dwarf2_locate_v5_dwp_sections (dwp_file->dbfd.get (), sec, | |
12535 | dwp_file.get ()); | |
12536 | } | |
73869dc2 | 12537 | |
298e9637 SM |
12538 | dwp_file->loaded_cus = allocate_dwp_loaded_cutus_table (); |
12539 | dwp_file->loaded_tus = allocate_dwp_loaded_cutus_table (); | |
80626a55 | 12540 | |
6f738b01 SM |
12541 | dwarf_read_debug_printf ("DWP file found: %s", dwp_file->name); |
12542 | dwarf_read_debug_printf (" %s CUs, %s TUs", | |
12543 | pulongest (dwp_file->cus ? dwp_file->cus->nr_units : 0), | |
12544 | pulongest (dwp_file->tus ? dwp_file->tus->nr_units : 0)); | |
80626a55 DE |
12545 | |
12546 | return dwp_file; | |
3019eac3 | 12547 | } |
c906108c | 12548 | |
ab5088bf DE |
12549 | /* Wrapper around open_and_init_dwp_file, only open it once. */ |
12550 | ||
12551 | static struct dwp_file * | |
976ca316 | 12552 | get_dwp_file (dwarf2_per_objfile *per_objfile) |
ab5088bf | 12553 | { |
976ca316 | 12554 | if (!per_objfile->per_bfd->dwp_checked) |
ab5088bf | 12555 | { |
976ca316 SM |
12556 | per_objfile->per_bfd->dwp_file = open_and_init_dwp_file (per_objfile); |
12557 | per_objfile->per_bfd->dwp_checked = 1; | |
ab5088bf | 12558 | } |
976ca316 | 12559 | return per_objfile->per_bfd->dwp_file.get (); |
ab5088bf DE |
12560 | } |
12561 | ||
80626a55 DE |
12562 | /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit. |
12563 | Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME | |
12564 | or in the DWP file for the objfile, referenced by THIS_UNIT. | |
3019eac3 | 12565 | If non-NULL, comp_dir is the DW_AT_comp_dir attribute. |
80626a55 DE |
12566 | IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU. |
12567 | ||
12568 | This is called, for example, when wanting to read a variable with a | |
12569 | complex location. Therefore we don't want to do file i/o for every call. | |
12570 | Therefore we don't want to look for a DWO file on every call. | |
12571 | Therefore we first see if we've already seen SIGNATURE in a DWP file, | |
12572 | then we check if we've already seen DWO_NAME, and only THEN do we check | |
12573 | for a DWO file. | |
12574 | ||
1c658ad5 | 12575 | The result is a pointer to the dwo_unit object or NULL if we didn't find it |
80626a55 | 12576 | (dwo_id mismatch or couldn't find the DWO/DWP file). */ |
debd256d | 12577 | |
3019eac3 | 12578 | static struct dwo_unit * |
4ab09049 | 12579 | lookup_dwo_cutu (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir, |
80626a55 | 12580 | ULONGEST signature, int is_debug_types) |
3019eac3 | 12581 | { |
976ca316 SM |
12582 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
12583 | struct objfile *objfile = per_objfile->objfile; | |
80626a55 DE |
12584 | const char *kind = is_debug_types ? "TU" : "CU"; |
12585 | void **dwo_file_slot; | |
3019eac3 | 12586 | struct dwo_file *dwo_file; |
80626a55 | 12587 | struct dwp_file *dwp_file; |
cb1df416 | 12588 | |
6a506a2d DE |
12589 | /* First see if there's a DWP file. |
12590 | If we have a DWP file but didn't find the DWO inside it, don't | |
12591 | look for the original DWO file. It makes gdb behave differently | |
12592 | depending on whether one is debugging in the build tree. */ | |
cf2c3c16 | 12593 | |
976ca316 | 12594 | dwp_file = get_dwp_file (per_objfile); |
80626a55 | 12595 | if (dwp_file != NULL) |
cf2c3c16 | 12596 | { |
80626a55 DE |
12597 | const struct dwp_hash_table *dwp_htab = |
12598 | is_debug_types ? dwp_file->tus : dwp_file->cus; | |
12599 | ||
12600 | if (dwp_htab != NULL) | |
12601 | { | |
12602 | struct dwo_unit *dwo_cutu = | |
976ca316 SM |
12603 | lookup_dwo_unit_in_dwp (per_objfile, dwp_file, comp_dir, signature, |
12604 | is_debug_types); | |
80626a55 DE |
12605 | |
12606 | if (dwo_cutu != NULL) | |
12607 | { | |
6f738b01 SM |
12608 | dwarf_read_debug_printf ("Virtual DWO %s %s found: @%s", |
12609 | kind, hex_string (signature), | |
12610 | host_address_to_string (dwo_cutu)); | |
12611 | ||
80626a55 DE |
12612 | return dwo_cutu; |
12613 | } | |
12614 | } | |
12615 | } | |
6a506a2d | 12616 | else |
80626a55 | 12617 | { |
6a506a2d | 12618 | /* No DWP file, look for the DWO file. */ |
80626a55 | 12619 | |
976ca316 | 12620 | dwo_file_slot = lookup_dwo_file_slot (per_objfile, dwo_name, comp_dir); |
6a506a2d | 12621 | if (*dwo_file_slot == NULL) |
80626a55 | 12622 | { |
6a506a2d | 12623 | /* Read in the file and build a table of the CUs/TUs it contains. */ |
4ab09049 | 12624 | *dwo_file_slot = open_and_init_dwo_file (cu, dwo_name, comp_dir); |
19c3d4c9 | 12625 | } |
6a506a2d | 12626 | /* NOTE: This will be NULL if unable to open the file. */ |
9a3c8263 | 12627 | dwo_file = (struct dwo_file *) *dwo_file_slot; |
3019eac3 | 12628 | |
6a506a2d | 12629 | if (dwo_file != NULL) |
19c3d4c9 | 12630 | { |
6a506a2d DE |
12631 | struct dwo_unit *dwo_cutu = NULL; |
12632 | ||
12633 | if (is_debug_types && dwo_file->tus) | |
12634 | { | |
12635 | struct dwo_unit find_dwo_cutu; | |
12636 | ||
12637 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12638 | find_dwo_cutu.signature = signature; | |
9a3c8263 | 12639 | dwo_cutu |
b0b6a987 TT |
12640 | = (struct dwo_unit *) htab_find (dwo_file->tus.get (), |
12641 | &find_dwo_cutu); | |
6a506a2d | 12642 | } |
33c5cd75 | 12643 | else if (!is_debug_types && dwo_file->cus) |
80626a55 | 12644 | { |
33c5cd75 DB |
12645 | struct dwo_unit find_dwo_cutu; |
12646 | ||
12647 | memset (&find_dwo_cutu, 0, sizeof (find_dwo_cutu)); | |
12648 | find_dwo_cutu.signature = signature; | |
b0b6a987 | 12649 | dwo_cutu = (struct dwo_unit *)htab_find (dwo_file->cus.get (), |
33c5cd75 | 12650 | &find_dwo_cutu); |
6a506a2d DE |
12651 | } |
12652 | ||
12653 | if (dwo_cutu != NULL) | |
12654 | { | |
6f738b01 SM |
12655 | dwarf_read_debug_printf ("DWO %s %s(%s) found: @%s", |
12656 | kind, dwo_name, hex_string (signature), | |
12657 | host_address_to_string (dwo_cutu)); | |
12658 | ||
6a506a2d | 12659 | return dwo_cutu; |
80626a55 DE |
12660 | } |
12661 | } | |
2e276125 | 12662 | } |
9cdd5dbd | 12663 | |
80626a55 DE |
12664 | /* We didn't find it. This could mean a dwo_id mismatch, or |
12665 | someone deleted the DWO/DWP file, or the search path isn't set up | |
12666 | correctly to find the file. */ | |
12667 | ||
6f738b01 SM |
12668 | dwarf_read_debug_printf ("DWO %s %s(%s) not found", |
12669 | kind, dwo_name, hex_string (signature)); | |
3019eac3 | 12670 | |
6656a72d DE |
12671 | /* This is a warning and not a complaint because it can be caused by |
12672 | pilot error (e.g., user accidentally deleting the DWO). */ | |
43942612 DE |
12673 | { |
12674 | /* Print the name of the DWP file if we looked there, helps the user | |
12675 | better diagnose the problem. */ | |
791afaa2 | 12676 | std::string dwp_text; |
43942612 DE |
12677 | |
12678 | if (dwp_file != NULL) | |
791afaa2 TT |
12679 | dwp_text = string_printf (" [in DWP file %s]", |
12680 | lbasename (dwp_file->name)); | |
43942612 | 12681 | |
9d8780f0 | 12682 | warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s" |
43942612 | 12683 | " [in module %s]"), |
4ab09049 SM |
12684 | kind, dwo_name, hex_string (signature), dwp_text.c_str (), kind, |
12685 | sect_offset_str (cu->per_cu->sect_off), objfile_name (objfile)); | |
43942612 | 12686 | } |
3019eac3 | 12687 | return NULL; |
5fb290d7 DJ |
12688 | } |
12689 | ||
80626a55 DE |
12690 | /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU. |
12691 | See lookup_dwo_cutu_unit for details. */ | |
12692 | ||
12693 | static struct dwo_unit * | |
4ab09049 | 12694 | lookup_dwo_comp_unit (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir, |
80626a55 DE |
12695 | ULONGEST signature) |
12696 | { | |
4ab09049 SM |
12697 | gdb_assert (!cu->per_cu->is_debug_types); |
12698 | ||
12699 | return lookup_dwo_cutu (cu, dwo_name, comp_dir, signature, 0); | |
80626a55 DE |
12700 | } |
12701 | ||
12702 | /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU. | |
12703 | See lookup_dwo_cutu_unit for details. */ | |
12704 | ||
12705 | static struct dwo_unit * | |
4ab09049 | 12706 | lookup_dwo_type_unit (dwarf2_cu *cu, const char *dwo_name, const char *comp_dir) |
80626a55 | 12707 | { |
4ab09049 SM |
12708 | gdb_assert (cu->per_cu->is_debug_types); |
12709 | ||
12710 | signatured_type *sig_type = (signatured_type *) cu->per_cu; | |
12711 | ||
12712 | return lookup_dwo_cutu (cu, dwo_name, comp_dir, sig_type->signature, 1); | |
80626a55 DE |
12713 | } |
12714 | ||
89e63ee4 DE |
12715 | /* Traversal function for queue_and_load_all_dwo_tus. */ |
12716 | ||
12717 | static int | |
12718 | queue_and_load_dwo_tu (void **slot, void *info) | |
12719 | { | |
12720 | struct dwo_unit *dwo_unit = (struct dwo_unit *) *slot; | |
d460f660 | 12721 | dwarf2_cu *cu = (dwarf2_cu *) info; |
89e63ee4 | 12722 | ULONGEST signature = dwo_unit->signature; |
d460f660 | 12723 | signatured_type *sig_type = lookup_dwo_signatured_type (cu, signature); |
89e63ee4 DE |
12724 | |
12725 | if (sig_type != NULL) | |
12726 | { | |
89e63ee4 DE |
12727 | /* We pass NULL for DEPENDENT_CU because we don't yet know if there's |
12728 | a real dependency of PER_CU on SIG_TYPE. That is detected later | |
12729 | while processing PER_CU. */ | |
0d305d5c TT |
12730 | if (maybe_queue_comp_unit (NULL, sig_type, cu->per_objfile, |
12731 | cu->language)) | |
12732 | load_full_type_unit (sig_type, cu->per_objfile); | |
12733 | cu->per_cu->imported_symtabs_push (sig_type); | |
89e63ee4 DE |
12734 | } |
12735 | ||
12736 | return 1; | |
12737 | } | |
12738 | ||
1b555f17 | 12739 | /* Queue all TUs contained in the DWO of CU to be read in. |
89e63ee4 DE |
12740 | The DWO may have the only definition of the type, though it may not be |
12741 | referenced anywhere in PER_CU. Thus we have to load *all* its TUs. | |
12742 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */ | |
12743 | ||
12744 | static void | |
1b555f17 | 12745 | queue_and_load_all_dwo_tus (dwarf2_cu *cu) |
89e63ee4 DE |
12746 | { |
12747 | struct dwo_unit *dwo_unit; | |
12748 | struct dwo_file *dwo_file; | |
12749 | ||
1b555f17 SM |
12750 | gdb_assert (cu != nullptr); |
12751 | gdb_assert (!cu->per_cu->is_debug_types); | |
12752 | gdb_assert (get_dwp_file (cu->per_objfile) == nullptr); | |
89e63ee4 | 12753 | |
1b555f17 | 12754 | dwo_unit = cu->dwo_unit; |
89e63ee4 DE |
12755 | gdb_assert (dwo_unit != NULL); |
12756 | ||
12757 | dwo_file = dwo_unit->dwo_file; | |
12758 | if (dwo_file->tus != NULL) | |
1b555f17 | 12759 | htab_traverse_noresize (dwo_file->tus.get (), queue_and_load_dwo_tu, cu); |
89e63ee4 DE |
12760 | } |
12761 | ||
3019eac3 | 12762 | /* Read in various DIEs. */ |
348e048f | 12763 | |
d389af10 | 12764 | /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes). |
3e43a32a MS |
12765 | Inherit only the children of the DW_AT_abstract_origin DIE not being |
12766 | already referenced by DW_AT_abstract_origin from the children of the | |
12767 | current DIE. */ | |
d389af10 JK |
12768 | |
12769 | static void | |
12770 | inherit_abstract_dies (struct die_info *die, struct dwarf2_cu *cu) | |
12771 | { | |
12772 | struct die_info *child_die; | |
791afaa2 | 12773 | sect_offset *offsetp; |
d389af10 JK |
12774 | /* Parent of DIE - referenced by DW_AT_abstract_origin. */ |
12775 | struct die_info *origin_die; | |
12776 | /* Iterator of the ORIGIN_DIE children. */ | |
12777 | struct die_info *origin_child_die; | |
d389af10 | 12778 | struct attribute *attr; |
cd02d79d PA |
12779 | struct dwarf2_cu *origin_cu; |
12780 | struct pending **origin_previous_list_in_scope; | |
d389af10 JK |
12781 | |
12782 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
12783 | if (!attr) | |
12784 | return; | |
12785 | ||
cd02d79d PA |
12786 | /* Note that following die references may follow to a die in a |
12787 | different cu. */ | |
12788 | ||
12789 | origin_cu = cu; | |
12790 | origin_die = follow_die_ref (die, attr, &origin_cu); | |
12791 | ||
12792 | /* We're inheriting ORIGIN's children into the scope we'd put DIE's | |
12793 | symbols in. */ | |
12794 | origin_previous_list_in_scope = origin_cu->list_in_scope; | |
12795 | origin_cu->list_in_scope = cu->list_in_scope; | |
12796 | ||
edb3359d DJ |
12797 | if (die->tag != origin_die->tag |
12798 | && !(die->tag == DW_TAG_inlined_subroutine | |
12799 | && origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12800 | complaint (_("DIE %s and its abstract origin %s have different tags"), |
9d8780f0 SM |
12801 | sect_offset_str (die->sect_off), |
12802 | sect_offset_str (origin_die->sect_off)); | |
d389af10 | 12803 | |
34dc0f95 TBA |
12804 | /* Find if the concrete and abstract trees are structurally the |
12805 | same. This is a shallow traversal and it is not bullet-proof; | |
12806 | the compiler can trick the debugger into believing that the trees | |
12807 | are isomorphic, whereas they actually are not. However, the | |
12808 | likelyhood of this happening is pretty low, and a full-fledged | |
12809 | check would be an overkill. */ | |
12810 | bool are_isomorphic = true; | |
12811 | die_info *concrete_child = die->child; | |
12812 | die_info *abstract_child = origin_die->child; | |
12813 | while (concrete_child != nullptr || abstract_child != nullptr) | |
12814 | { | |
12815 | if (concrete_child == nullptr | |
12816 | || abstract_child == nullptr | |
12817 | || concrete_child->tag != abstract_child->tag) | |
12818 | { | |
12819 | are_isomorphic = false; | |
12820 | break; | |
12821 | } | |
12822 | ||
12823 | concrete_child = concrete_child->sibling; | |
12824 | abstract_child = abstract_child->sibling; | |
12825 | } | |
12826 | ||
12827 | /* Walk the origin's children in parallel to the concrete children. | |
12828 | This helps match an origin child in case the debug info misses | |
12829 | DW_AT_abstract_origin attributes. Keep in mind that the abstract | |
12830 | origin tree may not have the same tree structure as the concrete | |
12831 | DIE, though. */ | |
12832 | die_info *corresponding_abstract_child | |
12833 | = are_isomorphic ? origin_die->child : nullptr; | |
12834 | ||
791afaa2 | 12835 | std::vector<sect_offset> offsets; |
d389af10 | 12836 | |
3ea89b92 PMR |
12837 | for (child_die = die->child; |
12838 | child_die && child_die->tag; | |
436c571c | 12839 | child_die = child_die->sibling) |
3ea89b92 PMR |
12840 | { |
12841 | struct die_info *child_origin_die; | |
12842 | struct dwarf2_cu *child_origin_cu; | |
12843 | ||
12844 | /* We are trying to process concrete instance entries: | |
216f72a1 | 12845 | DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but |
3ea89b92 PMR |
12846 | it's not relevant to our analysis here. i.e. detecting DIEs that are |
12847 | present in the abstract instance but not referenced in the concrete | |
12848 | one. */ | |
216f72a1 | 12849 | if (child_die->tag == DW_TAG_call_site |
dda83cd7 | 12850 | || child_die->tag == DW_TAG_GNU_call_site) |
34dc0f95 TBA |
12851 | { |
12852 | if (are_isomorphic) | |
12853 | corresponding_abstract_child | |
12854 | = corresponding_abstract_child->sibling; | |
12855 | continue; | |
12856 | } | |
3ea89b92 | 12857 | |
c38f313d DJ |
12858 | /* For each CHILD_DIE, find the corresponding child of |
12859 | ORIGIN_DIE. If there is more than one layer of | |
12860 | DW_AT_abstract_origin, follow them all; there shouldn't be, | |
12861 | but GCC versions at least through 4.4 generate this (GCC PR | |
12862 | 40573). */ | |
3ea89b92 PMR |
12863 | child_origin_die = child_die; |
12864 | child_origin_cu = cu; | |
c38f313d DJ |
12865 | while (1) |
12866 | { | |
cd02d79d PA |
12867 | attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, |
12868 | child_origin_cu); | |
c38f313d DJ |
12869 | if (attr == NULL) |
12870 | break; | |
cd02d79d PA |
12871 | child_origin_die = follow_die_ref (child_origin_die, attr, |
12872 | &child_origin_cu); | |
c38f313d DJ |
12873 | } |
12874 | ||
34dc0f95 TBA |
12875 | /* If missing DW_AT_abstract_origin, try the corresponding child |
12876 | of the origin. Clang emits such lexical scopes. */ | |
12877 | if (child_origin_die == child_die | |
12878 | && dwarf2_attr (child_die, DW_AT_abstract_origin, cu) == nullptr | |
12879 | && are_isomorphic | |
12880 | && child_die->tag == DW_TAG_lexical_block) | |
12881 | child_origin_die = corresponding_abstract_child; | |
12882 | ||
d389af10 JK |
12883 | /* According to DWARF3 3.3.8.2 #3 new entries without their abstract |
12884 | counterpart may exist. */ | |
c38f313d | 12885 | if (child_origin_die != child_die) |
d389af10 | 12886 | { |
edb3359d DJ |
12887 | if (child_die->tag != child_origin_die->tag |
12888 | && !(child_die->tag == DW_TAG_inlined_subroutine | |
12889 | && child_origin_die->tag == DW_TAG_subprogram)) | |
b98664d3 | 12890 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12891 | "different tags"), |
9d8780f0 SM |
12892 | sect_offset_str (child_die->sect_off), |
12893 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12894 | if (child_origin_die->parent != origin_die) |
b98664d3 | 12895 | complaint (_("Child DIE %s and its abstract origin %s have " |
9c541725 | 12896 | "different parents"), |
9d8780f0 SM |
12897 | sect_offset_str (child_die->sect_off), |
12898 | sect_offset_str (child_origin_die->sect_off)); | |
c38f313d | 12899 | else |
791afaa2 | 12900 | offsets.push_back (child_origin_die->sect_off); |
d389af10 | 12901 | } |
34dc0f95 TBA |
12902 | |
12903 | if (are_isomorphic) | |
12904 | corresponding_abstract_child = corresponding_abstract_child->sibling; | |
d389af10 | 12905 | } |
791afaa2 TT |
12906 | std::sort (offsets.begin (), offsets.end ()); |
12907 | sect_offset *offsets_end = offsets.data () + offsets.size (); | |
12908 | for (offsetp = offsets.data () + 1; offsetp < offsets_end; offsetp++) | |
9c541725 | 12909 | if (offsetp[-1] == *offsetp) |
b98664d3 | 12910 | complaint (_("Multiple children of DIE %s refer " |
9d8780f0 SM |
12911 | "to DIE %s as their abstract origin"), |
12912 | sect_offset_str (die->sect_off), sect_offset_str (*offsetp)); | |
d389af10 | 12913 | |
791afaa2 | 12914 | offsetp = offsets.data (); |
d389af10 JK |
12915 | origin_child_die = origin_die->child; |
12916 | while (origin_child_die && origin_child_die->tag) | |
12917 | { | |
12918 | /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */ | |
b64f50a1 | 12919 | while (offsetp < offsets_end |
9c541725 | 12920 | && *offsetp < origin_child_die->sect_off) |
d389af10 | 12921 | offsetp++; |
b64f50a1 | 12922 | if (offsetp >= offsets_end |
9c541725 | 12923 | || *offsetp > origin_child_die->sect_off) |
d389af10 | 12924 | { |
adde2bff DE |
12925 | /* Found that ORIGIN_CHILD_DIE is really not referenced. |
12926 | Check whether we're already processing ORIGIN_CHILD_DIE. | |
12927 | This can happen with mutually referenced abstract_origins. | |
12928 | PR 16581. */ | |
12929 | if (!origin_child_die->in_process) | |
12930 | process_die (origin_child_die, origin_cu); | |
d389af10 | 12931 | } |
436c571c | 12932 | origin_child_die = origin_child_die->sibling; |
d389af10 | 12933 | } |
cd02d79d | 12934 | origin_cu->list_in_scope = origin_previous_list_in_scope; |
8d9a2568 KB |
12935 | |
12936 | if (cu != origin_cu) | |
12937 | compute_delayed_physnames (origin_cu); | |
d389af10 JK |
12938 | } |
12939 | ||
c906108c | 12940 | static void |
e7c27a73 | 12941 | read_func_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 12942 | { |
5e22e966 | 12943 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 12944 | struct gdbarch *gdbarch = objfile->arch (); |
fe978cb0 | 12945 | struct context_stack *newobj; |
c906108c SS |
12946 | CORE_ADDR lowpc; |
12947 | CORE_ADDR highpc; | |
12948 | struct die_info *child_die; | |
edb3359d | 12949 | struct attribute *attr, *call_line, *call_file; |
15d034d0 | 12950 | const char *name; |
e142c38c | 12951 | CORE_ADDR baseaddr; |
801e3a5b | 12952 | struct block *block; |
edb3359d | 12953 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
2f4732b0 | 12954 | std::vector<struct symbol *> template_args; |
34eaf542 | 12955 | struct template_symbol *templ_func = NULL; |
edb3359d DJ |
12956 | |
12957 | if (inlined_func) | |
12958 | { | |
12959 | /* If we do not have call site information, we can't show the | |
12960 | caller of this inlined function. That's too confusing, so | |
12961 | only use the scope for local variables. */ | |
12962 | call_line = dwarf2_attr (die, DW_AT_call_line, cu); | |
12963 | call_file = dwarf2_attr (die, DW_AT_call_file, cu); | |
12964 | if (call_line == NULL || call_file == NULL) | |
12965 | { | |
12966 | read_lexical_block_scope (die, cu); | |
12967 | return; | |
12968 | } | |
12969 | } | |
c906108c | 12970 | |
b3b3bada | 12971 | baseaddr = objfile->text_section_offset (); |
e142c38c | 12972 | |
94af9270 | 12973 | name = dwarf2_name (die, cu); |
c906108c | 12974 | |
e8d05480 JB |
12975 | /* Ignore functions with missing or empty names. These are actually |
12976 | illegal according to the DWARF standard. */ | |
12977 | if (name == NULL) | |
12978 | { | |
b98664d3 | 12979 | complaint (_("missing name for subprogram DIE at %s"), |
9d8780f0 | 12980 | sect_offset_str (die->sect_off)); |
e8d05480 JB |
12981 | return; |
12982 | } | |
12983 | ||
12984 | /* Ignore functions with missing or invalid low and high pc attributes. */ | |
3a2b436a | 12985 | if (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL) |
e385593e | 12986 | <= PC_BOUNDS_INVALID) |
e8d05480 | 12987 | { |
ae4d0c03 | 12988 | attr = dwarf2_attr (die, DW_AT_external, cu); |
c45bc3f8 | 12989 | if (attr == nullptr || !attr->as_boolean ()) |
b98664d3 | 12990 | complaint (_("cannot get low and high bounds " |
9d8780f0 SM |
12991 | "for subprogram DIE at %s"), |
12992 | sect_offset_str (die->sect_off)); | |
e8d05480 JB |
12993 | return; |
12994 | } | |
c906108c | 12995 | |
3e29f34a MR |
12996 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
12997 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 12998 | |
34eaf542 TT |
12999 | /* If we have any template arguments, then we must allocate a |
13000 | different sort of symbol. */ | |
436c571c | 13001 | for (child_die = die->child; child_die; child_die = child_die->sibling) |
34eaf542 TT |
13002 | { |
13003 | if (child_die->tag == DW_TAG_template_type_param | |
13004 | || child_die->tag == DW_TAG_template_value_param) | |
13005 | { | |
8c14c3a3 | 13006 | templ_func = new (&objfile->objfile_obstack) template_symbol; |
cf724bc9 | 13007 | templ_func->subclass = SYMBOL_TEMPLATE; |
34eaf542 TT |
13008 | break; |
13009 | } | |
13010 | } | |
13011 | ||
702cf3f5 | 13012 | gdb_assert (cu->get_builder () != nullptr); |
c24bdb02 | 13013 | newobj = cu->get_builder ()->push_context (0, lowpc); |
5e2db402 TT |
13014 | newobj->name = new_symbol (die, read_type_die (die, cu), cu, |
13015 | (struct symbol *) templ_func); | |
4c2df51b | 13016 | |
81873cc8 | 13017 | if (dwarf2_flag_true_p (die, DW_AT_main_subprogram, cu)) |
987012b8 | 13018 | set_objfile_main_name (objfile, newobj->name->linkage_name (), |
81873cc8 TV |
13019 | cu->language); |
13020 | ||
4cecd739 DJ |
13021 | /* If there is a location expression for DW_AT_frame_base, record |
13022 | it. */ | |
e142c38c | 13023 | attr = dwarf2_attr (die, DW_AT_frame_base, cu); |
435d3d88 | 13024 | if (attr != nullptr) |
fe978cb0 | 13025 | dwarf2_symbol_mark_computed (attr, newobj->name, cu, 1); |
4c2df51b | 13026 | |
63e43d3a PMR |
13027 | /* If there is a location for the static link, record it. */ |
13028 | newobj->static_link = NULL; | |
13029 | attr = dwarf2_attr (die, DW_AT_static_link, cu); | |
435d3d88 | 13030 | if (attr != nullptr) |
63e43d3a | 13031 | { |
224c3ddb SM |
13032 | newobj->static_link |
13033 | = XOBNEW (&objfile->objfile_obstack, struct dynamic_prop); | |
9a49df9d | 13034 | attr_to_dynamic_prop (attr, die, cu, newobj->static_link, |
293e7e51 | 13035 | cu->addr_type ()); |
63e43d3a PMR |
13036 | } |
13037 | ||
c24bdb02 | 13038 | cu->list_in_scope = cu->get_builder ()->get_local_symbols (); |
c906108c | 13039 | |
639d11d3 | 13040 | if (die->child != NULL) |
c906108c | 13041 | { |
639d11d3 | 13042 | child_die = die->child; |
c906108c SS |
13043 | while (child_die && child_die->tag) |
13044 | { | |
34eaf542 TT |
13045 | if (child_die->tag == DW_TAG_template_type_param |
13046 | || child_die->tag == DW_TAG_template_value_param) | |
13047 | { | |
13048 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
13049 | ||
f1078f66 | 13050 | if (arg != NULL) |
2f4732b0 | 13051 | template_args.push_back (arg); |
34eaf542 TT |
13052 | } |
13053 | else | |
13054 | process_die (child_die, cu); | |
436c571c | 13055 | child_die = child_die->sibling; |
c906108c SS |
13056 | } |
13057 | } | |
13058 | ||
d389af10 JK |
13059 | inherit_abstract_dies (die, cu); |
13060 | ||
4a811a97 UW |
13061 | /* If we have a DW_AT_specification, we might need to import using |
13062 | directives from the context of the specification DIE. See the | |
13063 | comment in determine_prefix. */ | |
13064 | if (cu->language == language_cplus | |
13065 | && dwarf2_attr (die, DW_AT_specification, cu)) | |
13066 | { | |
13067 | struct dwarf2_cu *spec_cu = cu; | |
13068 | struct die_info *spec_die = die_specification (die, &spec_cu); | |
13069 | ||
13070 | while (spec_die) | |
13071 | { | |
13072 | child_die = spec_die->child; | |
13073 | while (child_die && child_die->tag) | |
13074 | { | |
13075 | if (child_die->tag == DW_TAG_imported_module) | |
13076 | process_die (child_die, spec_cu); | |
436c571c | 13077 | child_die = child_die->sibling; |
4a811a97 UW |
13078 | } |
13079 | ||
13080 | /* In some cases, GCC generates specification DIEs that | |
13081 | themselves contain DW_AT_specification attributes. */ | |
13082 | spec_die = die_specification (spec_die, &spec_cu); | |
13083 | } | |
13084 | } | |
13085 | ||
c24bdb02 | 13086 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13087 | /* Make a block for the local symbols within. */ |
c24bdb02 | 13088 | block = cu->get_builder ()->finish_block (cstk.name, cstk.old_blocks, |
804d2729 | 13089 | cstk.static_link, lowpc, highpc); |
801e3a5b | 13090 | |
df8a16a1 | 13091 | /* For C++, set the block's scope. */ |
45280282 IB |
13092 | if ((cu->language == language_cplus |
13093 | || cu->language == language_fortran | |
c44af4eb TT |
13094 | || cu->language == language_d |
13095 | || cu->language == language_rust) | |
4d4ec4e5 | 13096 | && cu->processing_has_namespace_info) |
195a3f6c TT |
13097 | block_set_scope (block, determine_prefix (die, cu), |
13098 | &objfile->objfile_obstack); | |
df8a16a1 | 13099 | |
801e3a5b JB |
13100 | /* If we have address ranges, record them. */ |
13101 | dwarf2_record_block_ranges (die, block, baseaddr, cu); | |
6e70227d | 13102 | |
a60f3166 | 13103 | gdbarch_make_symbol_special (gdbarch, cstk.name, objfile); |
3e29f34a | 13104 | |
34eaf542 | 13105 | /* Attach template arguments to function. */ |
2f4732b0 | 13106 | if (!template_args.empty ()) |
34eaf542 TT |
13107 | { |
13108 | gdb_assert (templ_func != NULL); | |
13109 | ||
2f4732b0 | 13110 | templ_func->n_template_arguments = template_args.size (); |
34eaf542 | 13111 | templ_func->template_arguments |
dda83cd7 | 13112 | = XOBNEWVEC (&objfile->objfile_obstack, struct symbol *, |
8d749320 | 13113 | templ_func->n_template_arguments); |
34eaf542 | 13114 | memcpy (templ_func->template_arguments, |
2f4732b0 | 13115 | template_args.data (), |
34eaf542 | 13116 | (templ_func->n_template_arguments * sizeof (struct symbol *))); |
3e1d3d8c TT |
13117 | |
13118 | /* Make sure that the symtab is set on the new symbols. Even | |
13119 | though they don't appear in this symtab directly, other parts | |
13120 | of gdb assume that symbols do, and this is reasonably | |
13121 | true. */ | |
8634679f | 13122 | for (symbol *sym : template_args) |
3e1d3d8c | 13123 | symbol_set_symtab (sym, symbol_symtab (templ_func)); |
34eaf542 TT |
13124 | } |
13125 | ||
208d8187 JB |
13126 | /* In C++, we can have functions nested inside functions (e.g., when |
13127 | a function declares a class that has methods). This means that | |
13128 | when we finish processing a function scope, we may need to go | |
13129 | back to building a containing block's symbol lists. */ | |
c24bdb02 KS |
13130 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13131 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
208d8187 | 13132 | |
921e78cf JB |
13133 | /* If we've finished processing a top-level function, subsequent |
13134 | symbols go in the file symbol list. */ | |
c24bdb02 KS |
13135 | if (cu->get_builder ()->outermost_context_p ()) |
13136 | cu->list_in_scope = cu->get_builder ()->get_file_symbols (); | |
c906108c SS |
13137 | } |
13138 | ||
13139 | /* Process all the DIES contained within a lexical block scope. Start | |
13140 | a new scope, process the dies, and then close the scope. */ | |
13141 | ||
13142 | static void | |
e7c27a73 | 13143 | read_lexical_block_scope (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 13144 | { |
5e22e966 | 13145 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 13146 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
13147 | CORE_ADDR lowpc, highpc; |
13148 | struct die_info *child_die; | |
e142c38c DJ |
13149 | CORE_ADDR baseaddr; |
13150 | ||
b3b3bada | 13151 | baseaddr = objfile->text_section_offset (); |
c906108c SS |
13152 | |
13153 | /* Ignore blocks with missing or invalid low and high pc attributes. */ | |
af34e669 DJ |
13154 | /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges |
13155 | as multiple lexical blocks? Handling children in a sane way would | |
6e70227d | 13156 | be nasty. Might be easier to properly extend generic blocks to |
af34e669 | 13157 | describe ranges. */ |
e385593e JK |
13158 | switch (dwarf2_get_pc_bounds (die, &lowpc, &highpc, cu, NULL)) |
13159 | { | |
13160 | case PC_BOUNDS_NOT_PRESENT: | |
13161 | /* DW_TAG_lexical_block has no attributes, process its children as if | |
13162 | there was no wrapping by that DW_TAG_lexical_block. | |
13163 | GCC does no longer produces such DWARF since GCC r224161. */ | |
13164 | for (child_die = die->child; | |
13165 | child_die != NULL && child_die->tag; | |
436c571c | 13166 | child_die = child_die->sibling) |
4f7bc5ed TT |
13167 | { |
13168 | /* We might already be processing this DIE. This can happen | |
13169 | in an unusual circumstance -- where a subroutine A | |
13170 | appears lexically in another subroutine B, but A actually | |
13171 | inlines B. The recursion is broken here, rather than in | |
13172 | inherit_abstract_dies, because it seems better to simply | |
13173 | drop concrete children here. */ | |
13174 | if (!child_die->in_process) | |
13175 | process_die (child_die, cu); | |
13176 | } | |
e385593e JK |
13177 | return; |
13178 | case PC_BOUNDS_INVALID: | |
13179 | return; | |
13180 | } | |
3e29f34a MR |
13181 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); |
13182 | highpc = gdbarch_adjust_dwarf2_addr (gdbarch, highpc + baseaddr); | |
c906108c | 13183 | |
c24bdb02 | 13184 | cu->get_builder ()->push_context (0, lowpc); |
639d11d3 | 13185 | if (die->child != NULL) |
c906108c | 13186 | { |
639d11d3 | 13187 | child_die = die->child; |
c906108c SS |
13188 | while (child_die && child_die->tag) |
13189 | { | |
e7c27a73 | 13190 | process_die (child_die, cu); |
436c571c | 13191 | child_die = child_die->sibling; |
c906108c SS |
13192 | } |
13193 | } | |
3ea89b92 | 13194 | inherit_abstract_dies (die, cu); |
c24bdb02 | 13195 | struct context_stack cstk = cu->get_builder ()->pop_context (); |
c906108c | 13196 | |
c24bdb02 KS |
13197 | if (*cu->get_builder ()->get_local_symbols () != NULL |
13198 | || (*cu->get_builder ()->get_local_using_directives ()) != NULL) | |
c906108c | 13199 | { |
801e3a5b | 13200 | struct block *block |
dda83cd7 | 13201 | = cu->get_builder ()->finish_block (0, cstk.old_blocks, NULL, |
804d2729 | 13202 | cstk.start_addr, highpc); |
801e3a5b JB |
13203 | |
13204 | /* Note that recording ranges after traversing children, as we | |
dda83cd7 SM |
13205 | do here, means that recording a parent's ranges entails |
13206 | walking across all its children's ranges as they appear in | |
13207 | the address map, which is quadratic behavior. | |
13208 | ||
13209 | It would be nicer to record the parent's ranges before | |
13210 | traversing its children, simply overriding whatever you find | |
13211 | there. But since we don't even decide whether to create a | |
13212 | block until after we've traversed its children, that's hard | |
13213 | to do. */ | |
801e3a5b | 13214 | dwarf2_record_block_ranges (die, block, baseaddr, cu); |
c906108c | 13215 | } |
c24bdb02 KS |
13216 | *cu->get_builder ()->get_local_symbols () = cstk.locals; |
13217 | cu->get_builder ()->set_local_using_directives (cstk.local_using_directives); | |
c906108c SS |
13218 | } |
13219 | ||
216f72a1 | 13220 | /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */ |
96408a79 SA |
13221 | |
13222 | static void | |
13223 | read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu) | |
13224 | { | |
5e22e966 | 13225 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba | 13226 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 13227 | struct gdbarch *gdbarch = objfile->arch (); |
96408a79 SA |
13228 | CORE_ADDR pc, baseaddr; |
13229 | struct attribute *attr; | |
13230 | struct call_site *call_site, call_site_local; | |
13231 | void **slot; | |
13232 | int nparams; | |
13233 | struct die_info *child_die; | |
13234 | ||
b3b3bada | 13235 | baseaddr = objfile->text_section_offset (); |
96408a79 | 13236 | |
216f72a1 JK |
13237 | attr = dwarf2_attr (die, DW_AT_call_return_pc, cu); |
13238 | if (attr == NULL) | |
13239 | { | |
13240 | /* This was a pre-DWARF-5 GNU extension alias | |
13241 | for DW_AT_call_return_pc. */ | |
13242 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); | |
13243 | } | |
96408a79 SA |
13244 | if (!attr) |
13245 | { | |
b98664d3 | 13246 | complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site " |
9d8780f0 SM |
13247 | "DIE %s [in module %s]"), |
13248 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13249 | return; |
13250 | } | |
95f982e5 | 13251 | pc = attr->as_address () + baseaddr; |
3e29f34a | 13252 | pc = gdbarch_adjust_dwarf2_addr (gdbarch, pc); |
96408a79 SA |
13253 | |
13254 | if (cu->call_site_htab == NULL) | |
13255 | cu->call_site_htab = htab_create_alloc_ex (16, core_addr_hash, core_addr_eq, | |
13256 | NULL, &objfile->objfile_obstack, | |
13257 | hashtab_obstack_allocate, NULL); | |
13258 | call_site_local.pc = pc; | |
13259 | slot = htab_find_slot (cu->call_site_htab, &call_site_local, INSERT); | |
13260 | if (*slot != NULL) | |
13261 | { | |
b98664d3 | 13262 | complaint (_("Duplicate PC %s for DW_TAG_call_site " |
9d8780f0 SM |
13263 | "DIE %s [in module %s]"), |
13264 | paddress (gdbarch, pc), sect_offset_str (die->sect_off), | |
4262abfb | 13265 | objfile_name (objfile)); |
96408a79 SA |
13266 | return; |
13267 | } | |
13268 | ||
13269 | /* Count parameters at the caller. */ | |
13270 | ||
13271 | nparams = 0; | |
13272 | for (child_die = die->child; child_die && child_die->tag; | |
436c571c | 13273 | child_die = child_die->sibling) |
96408a79 | 13274 | { |
216f72a1 | 13275 | if (child_die->tag != DW_TAG_call_site_parameter |
dda83cd7 | 13276 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
96408a79 | 13277 | { |
b98664d3 | 13278 | complaint (_("Tag %d is not DW_TAG_call_site_parameter in " |
9d8780f0 SM |
13279 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13280 | child_die->tag, sect_offset_str (child_die->sect_off), | |
4262abfb | 13281 | objfile_name (objfile)); |
96408a79 SA |
13282 | continue; |
13283 | } | |
13284 | ||
13285 | nparams++; | |
13286 | } | |
13287 | ||
224c3ddb SM |
13288 | call_site |
13289 | = ((struct call_site *) | |
13290 | obstack_alloc (&objfile->objfile_obstack, | |
13291 | sizeof (*call_site) | |
13292 | + (sizeof (*call_site->parameter) * (nparams - 1)))); | |
96408a79 SA |
13293 | *slot = call_site; |
13294 | memset (call_site, 0, sizeof (*call_site) - sizeof (*call_site->parameter)); | |
13295 | call_site->pc = pc; | |
13296 | ||
216f72a1 JK |
13297 | if (dwarf2_flag_true_p (die, DW_AT_call_tail_call, cu) |
13298 | || dwarf2_flag_true_p (die, DW_AT_GNU_tail_call, cu)) | |
96408a79 SA |
13299 | { |
13300 | struct die_info *func_die; | |
13301 | ||
13302 | /* Skip also over DW_TAG_inlined_subroutine. */ | |
13303 | for (func_die = die->parent; | |
13304 | func_die && func_die->tag != DW_TAG_subprogram | |
13305 | && func_die->tag != DW_TAG_subroutine_type; | |
13306 | func_die = func_die->parent); | |
13307 | ||
216f72a1 JK |
13308 | /* DW_AT_call_all_calls is a superset |
13309 | of DW_AT_call_all_tail_calls. */ | |
96408a79 | 13310 | if (func_die |
dda83cd7 SM |
13311 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_calls, cu) |
13312 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_call_sites, cu) | |
216f72a1 | 13313 | && !dwarf2_flag_true_p (func_die, DW_AT_call_all_tail_calls, cu) |
96408a79 SA |
13314 | && !dwarf2_flag_true_p (func_die, DW_AT_GNU_all_tail_call_sites, cu)) |
13315 | { | |
13316 | /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is | |
13317 | not complete. But keep CALL_SITE for look ups via call_site_htab, | |
13318 | both the initial caller containing the real return address PC and | |
13319 | the final callee containing the current PC of a chain of tail | |
13320 | calls do not need to have the tail call list complete. But any | |
13321 | function candidate for a virtual tail call frame searched via | |
13322 | TYPE_TAIL_CALL_LIST must have the tail call list complete to be | |
13323 | determined unambiguously. */ | |
13324 | } | |
13325 | else | |
13326 | { | |
13327 | struct type *func_type = NULL; | |
13328 | ||
13329 | if (func_die) | |
13330 | func_type = get_die_type (func_die, cu); | |
13331 | if (func_type != NULL) | |
13332 | { | |
78134374 | 13333 | gdb_assert (func_type->code () == TYPE_CODE_FUNC); |
96408a79 SA |
13334 | |
13335 | /* Enlist this call site to the function. */ | |
13336 | call_site->tail_call_next = TYPE_TAIL_CALL_LIST (func_type); | |
13337 | TYPE_TAIL_CALL_LIST (func_type) = call_site; | |
13338 | } | |
13339 | else | |
b98664d3 | 13340 | complaint (_("Cannot find function owning DW_TAG_call_site " |
9d8780f0 SM |
13341 | "DIE %s [in module %s]"), |
13342 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13343 | } |
13344 | } | |
13345 | ||
216f72a1 JK |
13346 | attr = dwarf2_attr (die, DW_AT_call_target, cu); |
13347 | if (attr == NULL) | |
13348 | attr = dwarf2_attr (die, DW_AT_GNU_call_site_target, cu); | |
13349 | if (attr == NULL) | |
13350 | attr = dwarf2_attr (die, DW_AT_call_origin, cu); | |
96408a79 | 13351 | if (attr == NULL) |
216f72a1 JK |
13352 | { |
13353 | /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */ | |
13354 | attr = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13355 | } | |
96408a79 | 13356 | SET_FIELD_DWARF_BLOCK (call_site->target, NULL); |
9d2246fc | 13357 | if (!attr || (attr->form_is_block () && attr->as_block ()->size == 0)) |
96408a79 | 13358 | /* Keep NULL DWARF_BLOCK. */; |
4fc6c0d5 | 13359 | else if (attr->form_is_block ()) |
96408a79 SA |
13360 | { |
13361 | struct dwarf2_locexpr_baton *dlbaton; | |
9d2246fc | 13362 | struct dwarf_block *block = attr->as_block (); |
96408a79 | 13363 | |
8d749320 | 13364 | dlbaton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
9d2246fc TT |
13365 | dlbaton->data = block->data; |
13366 | dlbaton->size = block->size; | |
a50264ba | 13367 | dlbaton->per_objfile = per_objfile; |
96408a79 SA |
13368 | dlbaton->per_cu = cu->per_cu; |
13369 | ||
13370 | SET_FIELD_DWARF_BLOCK (call_site->target, dlbaton); | |
13371 | } | |
cd6c91b4 | 13372 | else if (attr->form_is_ref ()) |
96408a79 | 13373 | { |
96408a79 SA |
13374 | struct dwarf2_cu *target_cu = cu; |
13375 | struct die_info *target_die; | |
13376 | ||
ac9ec31b | 13377 | target_die = follow_die_ref (die, attr, &target_cu); |
5e22e966 | 13378 | gdb_assert (target_cu->per_objfile->objfile == objfile); |
96408a79 SA |
13379 | if (die_is_declaration (target_die, target_cu)) |
13380 | { | |
7d45c7c3 | 13381 | const char *target_physname; |
9112db09 JK |
13382 | |
13383 | /* Prefer the mangled name; otherwise compute the demangled one. */ | |
73b9be8b | 13384 | target_physname = dw2_linkage_name (target_die, target_cu); |
7d45c7c3 | 13385 | if (target_physname == NULL) |
9112db09 | 13386 | target_physname = dwarf2_physname (NULL, target_die, target_cu); |
96408a79 | 13387 | if (target_physname == NULL) |
b98664d3 | 13388 | complaint (_("DW_AT_call_target target DIE has invalid " |
dda83cd7 | 13389 | "physname, for referencing DIE %s [in module %s]"), |
9d8780f0 | 13390 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
96408a79 | 13391 | else |
7d455152 | 13392 | SET_FIELD_PHYSNAME (call_site->target, target_physname); |
96408a79 SA |
13393 | } |
13394 | else | |
13395 | { | |
13396 | CORE_ADDR lowpc; | |
13397 | ||
13398 | /* DW_AT_entry_pc should be preferred. */ | |
3a2b436a | 13399 | if (dwarf2_get_pc_bounds (target_die, &lowpc, NULL, target_cu, NULL) |
e385593e | 13400 | <= PC_BOUNDS_INVALID) |
b98664d3 | 13401 | complaint (_("DW_AT_call_target target DIE has invalid " |
dda83cd7 | 13402 | "low pc, for referencing DIE %s [in module %s]"), |
9d8780f0 | 13403 | sect_offset_str (die->sect_off), objfile_name (objfile)); |
96408a79 | 13404 | else |
3e29f34a MR |
13405 | { |
13406 | lowpc = gdbarch_adjust_dwarf2_addr (gdbarch, lowpc + baseaddr); | |
13407 | SET_FIELD_PHYSADDR (call_site->target, lowpc); | |
13408 | } | |
96408a79 SA |
13409 | } |
13410 | } | |
13411 | else | |
b98664d3 | 13412 | complaint (_("DW_TAG_call_site DW_AT_call_target is neither " |
9d8780f0 SM |
13413 | "block nor reference, for DIE %s [in module %s]"), |
13414 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13415 | |
13416 | call_site->per_cu = cu->per_cu; | |
9f47c707 | 13417 | call_site->per_objfile = per_objfile; |
96408a79 SA |
13418 | |
13419 | for (child_die = die->child; | |
13420 | child_die && child_die->tag; | |
436c571c | 13421 | child_die = child_die->sibling) |
96408a79 | 13422 | { |
96408a79 | 13423 | struct call_site_parameter *parameter; |
1788b2d3 | 13424 | struct attribute *loc, *origin; |
96408a79 | 13425 | |
216f72a1 | 13426 | if (child_die->tag != DW_TAG_call_site_parameter |
dda83cd7 | 13427 | && child_die->tag != DW_TAG_GNU_call_site_parameter) |
96408a79 SA |
13428 | { |
13429 | /* Already printed the complaint above. */ | |
13430 | continue; | |
13431 | } | |
13432 | ||
13433 | gdb_assert (call_site->parameter_count < nparams); | |
13434 | parameter = &call_site->parameter[call_site->parameter_count]; | |
13435 | ||
1788b2d3 JK |
13436 | /* DW_AT_location specifies the register number or DW_AT_abstract_origin |
13437 | specifies DW_TAG_formal_parameter. Value of the data assumed for the | |
216f72a1 | 13438 | register is contained in DW_AT_call_value. */ |
96408a79 | 13439 | |
24c5c679 | 13440 | loc = dwarf2_attr (child_die, DW_AT_location, cu); |
216f72a1 JK |
13441 | origin = dwarf2_attr (child_die, DW_AT_call_parameter, cu); |
13442 | if (origin == NULL) | |
13443 | { | |
13444 | /* This was a pre-DWARF-5 GNU extension alias | |
13445 | for DW_AT_call_parameter. */ | |
13446 | origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu); | |
13447 | } | |
cd6c91b4 | 13448 | if (loc == NULL && origin != NULL && origin->form_is_ref ()) |
1788b2d3 | 13449 | { |
1788b2d3 | 13450 | parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET; |
9c541725 | 13451 | |
0826b30a | 13452 | sect_offset sect_off = origin->get_ref_die_offset (); |
4057dfde | 13453 | if (!cu->header.offset_in_cu_p (sect_off)) |
d76b7dbc JK |
13454 | { |
13455 | /* As DW_OP_GNU_parameter_ref uses CU-relative offset this | |
13456 | binding can be done only inside one CU. Such referenced DIE | |
13457 | therefore cannot be even moved to DW_TAG_partial_unit. */ | |
b98664d3 | 13458 | complaint (_("DW_AT_call_parameter offset is not in CU for " |
9d8780f0 SM |
13459 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13460 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13461 | objfile_name (objfile)); |
d76b7dbc JK |
13462 | continue; |
13463 | } | |
9c541725 PA |
13464 | parameter->u.param_cu_off |
13465 | = (cu_offset) (sect_off - cu->header.sect_off); | |
1788b2d3 | 13466 | } |
4fc6c0d5 | 13467 | else if (loc == NULL || origin != NULL || !loc->form_is_block ()) |
96408a79 | 13468 | { |
b98664d3 | 13469 | complaint (_("No DW_FORM_block* DW_AT_location for " |
9d8780f0 SM |
13470 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13471 | sect_offset_str (child_die->sect_off), objfile_name (objfile)); | |
96408a79 SA |
13472 | continue; |
13473 | } | |
24c5c679 | 13474 | else |
96408a79 | 13475 | { |
9d2246fc TT |
13476 | struct dwarf_block *block = loc->as_block (); |
13477 | ||
24c5c679 | 13478 | parameter->u.dwarf_reg = dwarf_block_to_dwarf_reg |
9d2246fc | 13479 | (block->data, &block->data[block->size]); |
24c5c679 JK |
13480 | if (parameter->u.dwarf_reg != -1) |
13481 | parameter->kind = CALL_SITE_PARAMETER_DWARF_REG; | |
9d2246fc TT |
13482 | else if (dwarf_block_to_sp_offset (gdbarch, block->data, |
13483 | &block->data[block->size], | |
24c5c679 JK |
13484 | ¶meter->u.fb_offset)) |
13485 | parameter->kind = CALL_SITE_PARAMETER_FB_OFFSET; | |
13486 | else | |
13487 | { | |
b98664d3 | 13488 | complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported " |
24c5c679 | 13489 | "for DW_FORM_block* DW_AT_location is supported for " |
9d8780f0 | 13490 | "DW_TAG_call_site child DIE %s " |
24c5c679 | 13491 | "[in module %s]"), |
9d8780f0 | 13492 | sect_offset_str (child_die->sect_off), |
9c541725 | 13493 | objfile_name (objfile)); |
24c5c679 JK |
13494 | continue; |
13495 | } | |
96408a79 SA |
13496 | } |
13497 | ||
216f72a1 JK |
13498 | attr = dwarf2_attr (child_die, DW_AT_call_value, cu); |
13499 | if (attr == NULL) | |
13500 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_value, cu); | |
4fc6c0d5 | 13501 | if (attr == NULL || !attr->form_is_block ()) |
96408a79 | 13502 | { |
b98664d3 | 13503 | complaint (_("No DW_FORM_block* DW_AT_call_value for " |
9d8780f0 SM |
13504 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13505 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13506 | objfile_name (objfile)); |
96408a79 SA |
13507 | continue; |
13508 | } | |
9d2246fc TT |
13509 | |
13510 | struct dwarf_block *block = attr->as_block (); | |
13511 | parameter->value = block->data; | |
13512 | parameter->value_size = block->size; | |
96408a79 SA |
13513 | |
13514 | /* Parameters are not pre-cleared by memset above. */ | |
13515 | parameter->data_value = NULL; | |
13516 | parameter->data_value_size = 0; | |
13517 | call_site->parameter_count++; | |
13518 | ||
216f72a1 JK |
13519 | attr = dwarf2_attr (child_die, DW_AT_call_data_value, cu); |
13520 | if (attr == NULL) | |
13521 | attr = dwarf2_attr (child_die, DW_AT_GNU_call_site_data_value, cu); | |
435d3d88 | 13522 | if (attr != nullptr) |
96408a79 | 13523 | { |
4fc6c0d5 | 13524 | if (!attr->form_is_block ()) |
b98664d3 | 13525 | complaint (_("No DW_FORM_block* DW_AT_call_data_value for " |
9d8780f0 SM |
13526 | "DW_TAG_call_site child DIE %s [in module %s]"), |
13527 | sect_offset_str (child_die->sect_off), | |
9c541725 | 13528 | objfile_name (objfile)); |
96408a79 SA |
13529 | else |
13530 | { | |
9d2246fc TT |
13531 | block = attr->as_block (); |
13532 | parameter->data_value = block->data; | |
13533 | parameter->data_value_size = block->size; | |
96408a79 SA |
13534 | } |
13535 | } | |
13536 | } | |
13537 | } | |
13538 | ||
71a3c369 TT |
13539 | /* Helper function for read_variable. If DIE represents a virtual |
13540 | table, then return the type of the concrete object that is | |
13541 | associated with the virtual table. Otherwise, return NULL. */ | |
13542 | ||
13543 | static struct type * | |
13544 | rust_containing_type (struct die_info *die, struct dwarf2_cu *cu) | |
13545 | { | |
13546 | struct attribute *attr = dwarf2_attr (die, DW_AT_type, cu); | |
13547 | if (attr == NULL) | |
13548 | return NULL; | |
13549 | ||
13550 | /* Find the type DIE. */ | |
13551 | struct die_info *type_die = NULL; | |
13552 | struct dwarf2_cu *type_cu = cu; | |
13553 | ||
cd6c91b4 | 13554 | if (attr->form_is_ref ()) |
71a3c369 TT |
13555 | type_die = follow_die_ref (die, attr, &type_cu); |
13556 | if (type_die == NULL) | |
13557 | return NULL; | |
13558 | ||
13559 | if (dwarf2_attr (type_die, DW_AT_containing_type, type_cu) == NULL) | |
13560 | return NULL; | |
13561 | return die_containing_type (type_die, type_cu); | |
13562 | } | |
13563 | ||
13564 | /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */ | |
13565 | ||
13566 | static void | |
13567 | read_variable (struct die_info *die, struct dwarf2_cu *cu) | |
13568 | { | |
13569 | struct rust_vtable_symbol *storage = NULL; | |
13570 | ||
13571 | if (cu->language == language_rust) | |
13572 | { | |
13573 | struct type *containing_type = rust_containing_type (die, cu); | |
13574 | ||
13575 | if (containing_type != NULL) | |
13576 | { | |
5e22e966 | 13577 | struct objfile *objfile = cu->per_objfile->objfile; |
71a3c369 | 13578 | |
8c14c3a3 | 13579 | storage = new (&objfile->objfile_obstack) rust_vtable_symbol; |
71a3c369 | 13580 | storage->concrete_type = containing_type; |
cf724bc9 | 13581 | storage->subclass = SYMBOL_RUST_VTABLE; |
71a3c369 TT |
13582 | } |
13583 | } | |
13584 | ||
e4a62c65 TV |
13585 | struct symbol *res = new_symbol (die, NULL, cu, storage); |
13586 | struct attribute *abstract_origin | |
13587 | = dwarf2_attr (die, DW_AT_abstract_origin, cu); | |
13588 | struct attribute *loc = dwarf2_attr (die, DW_AT_location, cu); | |
13589 | if (res == NULL && loc && abstract_origin) | |
13590 | { | |
13591 | /* We have a variable without a name, but with a location and an abstract | |
13592 | origin. This may be a concrete instance of an abstract variable | |
13593 | referenced from an DW_OP_GNU_variable_value, so save it to find it back | |
13594 | later. */ | |
13595 | struct dwarf2_cu *origin_cu = cu; | |
13596 | struct die_info *origin_die | |
13597 | = follow_die_ref (die, abstract_origin, &origin_cu); | |
5e22e966 SM |
13598 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
13599 | per_objfile->per_bfd->abstract_to_concrete | |
13600 | [origin_die->sect_off].push_back (die->sect_off); | |
e4a62c65 | 13601 | } |
71a3c369 TT |
13602 | } |
13603 | ||
43988095 JK |
13604 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET |
13605 | reading .debug_rnglists. | |
13606 | Callback's type should be: | |
13607 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
13608 | Return true if the attributes are present and valid, otherwise, | |
13609 | return false. */ | |
13610 | ||
13611 | template <typename Callback> | |
13612 | static bool | |
13613 | dwarf2_rnglists_process (unsigned offset, struct dwarf2_cu *cu, | |
d0ce17d8 | 13614 | dwarf_tag tag, Callback &&callback) |
43988095 | 13615 | { |
976ca316 SM |
13616 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
13617 | struct objfile *objfile = per_objfile->objfile; | |
43988095 | 13618 | bfd *obfd = objfile->obfd; |
43988095 | 13619 | /* Base address selection entry. */ |
2b24b6e4 | 13620 | gdb::optional<CORE_ADDR> base; |
43988095 | 13621 | const gdb_byte *buffer; |
43988095 JK |
13622 | CORE_ADDR baseaddr; |
13623 | bool overflow = false; | |
d0ce17d8 CT |
13624 | ULONGEST addr_index; |
13625 | struct dwarf2_section_info *rnglists_section; | |
43988095 | 13626 | |
43988095 | 13627 | base = cu->base_address; |
d0ce17d8 CT |
13628 | rnglists_section = cu_debug_rnglists_section (cu, tag); |
13629 | rnglists_section->read (objfile); | |
43988095 | 13630 | |
d0ce17d8 | 13631 | if (offset >= rnglists_section->size) |
43988095 | 13632 | { |
b98664d3 | 13633 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43988095 JK |
13634 | offset); |
13635 | return false; | |
13636 | } | |
d0ce17d8 | 13637 | buffer = rnglists_section->buffer + offset; |
43988095 | 13638 | |
b3b3bada | 13639 | baseaddr = objfile->text_section_offset (); |
43988095 JK |
13640 | |
13641 | while (1) | |
13642 | { | |
7814882a JK |
13643 | /* Initialize it due to a false compiler warning. */ |
13644 | CORE_ADDR range_beginning = 0, range_end = 0; | |
d0ce17d8 CT |
13645 | const gdb_byte *buf_end = (rnglists_section->buffer |
13646 | + rnglists_section->size); | |
43988095 JK |
13647 | unsigned int bytes_read; |
13648 | ||
13649 | if (buffer == buf_end) | |
13650 | { | |
13651 | overflow = true; | |
13652 | break; | |
13653 | } | |
13654 | const auto rlet = static_cast<enum dwarf_range_list_entry>(*buffer++); | |
13655 | switch (rlet) | |
13656 | { | |
13657 | case DW_RLE_end_of_list: | |
13658 | break; | |
13659 | case DW_RLE_base_address: | |
13660 | if (buffer + cu->header.addr_size > buf_end) | |
13661 | { | |
13662 | overflow = true; | |
13663 | break; | |
13664 | } | |
c8a7a66f | 13665 | base = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13666 | buffer += bytes_read; |
13667 | break; | |
dda83cd7 SM |
13668 | case DW_RLE_base_addressx: |
13669 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13670 | buffer += bytes_read; | |
13671 | base = read_addr_index (cu, addr_index); | |
13672 | break; | |
43988095 JK |
13673 | case DW_RLE_start_length: |
13674 | if (buffer + cu->header.addr_size > buf_end) | |
13675 | { | |
13676 | overflow = true; | |
13677 | break; | |
13678 | } | |
c8a7a66f TT |
13679 | range_beginning = cu->header.read_address (obfd, buffer, |
13680 | &bytes_read); | |
43988095 JK |
13681 | buffer += bytes_read; |
13682 | range_end = (range_beginning | |
13683 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13684 | buffer += bytes_read; | |
13685 | if (buffer > buf_end) | |
13686 | { | |
13687 | overflow = true; | |
13688 | break; | |
13689 | } | |
13690 | break; | |
d0ce17d8 | 13691 | case DW_RLE_startx_length: |
dda83cd7 SM |
13692 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
13693 | buffer += bytes_read; | |
13694 | range_beginning = read_addr_index (cu, addr_index); | |
13695 | if (buffer > buf_end) | |
13696 | { | |
13697 | overflow = true; | |
13698 | break; | |
13699 | } | |
13700 | range_end = (range_beginning | |
13701 | + read_unsigned_leb128 (obfd, buffer, &bytes_read)); | |
13702 | buffer += bytes_read; | |
13703 | break; | |
43988095 JK |
13704 | case DW_RLE_offset_pair: |
13705 | range_beginning = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13706 | buffer += bytes_read; | |
13707 | if (buffer > buf_end) | |
13708 | { | |
13709 | overflow = true; | |
13710 | break; | |
13711 | } | |
13712 | range_end = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13713 | buffer += bytes_read; | |
13714 | if (buffer > buf_end) | |
13715 | { | |
13716 | overflow = true; | |
13717 | break; | |
13718 | } | |
13719 | break; | |
13720 | case DW_RLE_start_end: | |
13721 | if (buffer + 2 * cu->header.addr_size > buf_end) | |
13722 | { | |
13723 | overflow = true; | |
13724 | break; | |
13725 | } | |
c8a7a66f TT |
13726 | range_beginning = cu->header.read_address (obfd, buffer, |
13727 | &bytes_read); | |
43988095 | 13728 | buffer += bytes_read; |
c8a7a66f | 13729 | range_end = cu->header.read_address (obfd, buffer, &bytes_read); |
43988095 JK |
13730 | buffer += bytes_read; |
13731 | break; | |
d0ce17d8 | 13732 | case DW_RLE_startx_endx: |
dda83cd7 SM |
13733 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); |
13734 | buffer += bytes_read; | |
13735 | range_beginning = read_addr_index (cu, addr_index); | |
13736 | if (buffer > buf_end) | |
13737 | { | |
13738 | overflow = true; | |
13739 | break; | |
13740 | } | |
13741 | addr_index = read_unsigned_leb128 (obfd, buffer, &bytes_read); | |
13742 | buffer += bytes_read; | |
13743 | range_end = read_addr_index (cu, addr_index); | |
13744 | break; | |
43988095 | 13745 | default: |
b98664d3 | 13746 | complaint (_("Invalid .debug_rnglists data (no base address)")); |
43988095 JK |
13747 | return false; |
13748 | } | |
13749 | if (rlet == DW_RLE_end_of_list || overflow) | |
13750 | break; | |
13751 | if (rlet == DW_RLE_base_address) | |
13752 | continue; | |
13753 | ||
43988095 JK |
13754 | if (range_beginning > range_end) |
13755 | { | |
13756 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13757 | complaint (_("Invalid .debug_rnglists data (inverted range)")); |
43988095 JK |
13758 | return false; |
13759 | } | |
13760 | ||
13761 | /* Empty range entries have no effect. */ | |
13762 | if (range_beginning == range_end) | |
13763 | continue; | |
13764 | ||
d0ce17d8 CT |
13765 | /* Only DW_RLE_offset_pair needs the base address added. */ |
13766 | if (rlet == DW_RLE_offset_pair) | |
13767 | { | |
13768 | if (!base.has_value ()) | |
13769 | { | |
13770 | /* We have no valid base address for the DW_RLE_offset_pair. */ | |
13771 | complaint (_("Invalid .debug_rnglists data (no base address for " | |
13772 | "DW_RLE_offset_pair)")); | |
13773 | return false; | |
13774 | } | |
13775 | ||
13776 | range_beginning += *base; | |
13777 | range_end += *base; | |
13778 | } | |
43988095 JK |
13779 | |
13780 | /* A not-uncommon case of bad debug info. | |
13781 | Don't pollute the addrmap with bad data. */ | |
13782 | if (range_beginning + baseaddr == 0 | |
976ca316 | 13783 | && !per_objfile->per_bfd->has_section_at_zero) |
43988095 | 13784 | { |
b98664d3 | 13785 | complaint (_(".debug_rnglists entry has start address of zero" |
43988095 JK |
13786 | " [in module %s]"), objfile_name (objfile)); |
13787 | continue; | |
13788 | } | |
13789 | ||
13790 | callback (range_beginning, range_end); | |
13791 | } | |
13792 | ||
13793 | if (overflow) | |
13794 | { | |
b98664d3 | 13795 | complaint (_("Offset %d is not terminated " |
43988095 JK |
13796 | "for DW_AT_ranges attribute"), |
13797 | offset); | |
13798 | return false; | |
13799 | } | |
13800 | ||
13801 | return true; | |
13802 | } | |
13803 | ||
13804 | /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges. | |
13805 | Callback's type should be: | |
13806 | void (CORE_ADDR range_beginning, CORE_ADDR range_end) | |
5f46c5a5 | 13807 | Return 1 if the attributes are present and valid, otherwise, return 0. */ |
43039443 | 13808 | |
43988095 | 13809 | template <typename Callback> |
43039443 | 13810 | static int |
d0ce17d8 | 13811 | dwarf2_ranges_process (unsigned offset, struct dwarf2_cu *cu, dwarf_tag tag, |
43988095 | 13812 | Callback &&callback) |
43039443 | 13813 | { |
5e22e966 SM |
13814 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
13815 | struct objfile *objfile = per_objfile->objfile; | |
43039443 JK |
13816 | struct comp_unit_head *cu_header = &cu->header; |
13817 | bfd *obfd = objfile->obfd; | |
13818 | unsigned int addr_size = cu_header->addr_size; | |
13819 | CORE_ADDR mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1)); | |
13820 | /* Base address selection entry. */ | |
2b24b6e4 | 13821 | gdb::optional<CORE_ADDR> base; |
43039443 | 13822 | unsigned int dummy; |
d521ce57 | 13823 | const gdb_byte *buffer; |
ff013f42 | 13824 | CORE_ADDR baseaddr; |
43039443 | 13825 | |
43988095 | 13826 | if (cu_header->version >= 5) |
d0ce17d8 | 13827 | return dwarf2_rnglists_process (offset, cu, tag, callback); |
43988095 | 13828 | |
d00adf39 | 13829 | base = cu->base_address; |
43039443 | 13830 | |
5e22e966 SM |
13831 | per_objfile->per_bfd->ranges.read (objfile); |
13832 | if (offset >= per_objfile->per_bfd->ranges.size) | |
43039443 | 13833 | { |
b98664d3 | 13834 | complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"), |
43039443 JK |
13835 | offset); |
13836 | return 0; | |
13837 | } | |
5e22e966 | 13838 | buffer = per_objfile->per_bfd->ranges.buffer + offset; |
43039443 | 13839 | |
b3b3bada | 13840 | baseaddr = objfile->text_section_offset (); |
ff013f42 | 13841 | |
43039443 JK |
13842 | while (1) |
13843 | { | |
13844 | CORE_ADDR range_beginning, range_end; | |
13845 | ||
c8a7a66f | 13846 | range_beginning = cu->header.read_address (obfd, buffer, &dummy); |
43039443 | 13847 | buffer += addr_size; |
c8a7a66f | 13848 | range_end = cu->header.read_address (obfd, buffer, &dummy); |
43039443 JK |
13849 | buffer += addr_size; |
13850 | offset += 2 * addr_size; | |
13851 | ||
13852 | /* An end of list marker is a pair of zero addresses. */ | |
13853 | if (range_beginning == 0 && range_end == 0) | |
13854 | /* Found the end of list entry. */ | |
13855 | break; | |
13856 | ||
13857 | /* Each base address selection entry is a pair of 2 values. | |
13858 | The first is the largest possible address, the second is | |
13859 | the base address. Check for a base address here. */ | |
13860 | if ((range_beginning & mask) == mask) | |
13861 | { | |
28d2bfb9 AB |
13862 | /* If we found the largest possible address, then we already |
13863 | have the base address in range_end. */ | |
13864 | base = range_end; | |
43039443 JK |
13865 | continue; |
13866 | } | |
13867 | ||
2b24b6e4 | 13868 | if (!base.has_value ()) |
43039443 JK |
13869 | { |
13870 | /* We have no valid base address for the ranges | |
13871 | data. */ | |
b98664d3 | 13872 | complaint (_("Invalid .debug_ranges data (no base address)")); |
43039443 JK |
13873 | return 0; |
13874 | } | |
13875 | ||
9277c30c UW |
13876 | if (range_beginning > range_end) |
13877 | { | |
13878 | /* Inverted range entries are invalid. */ | |
b98664d3 | 13879 | complaint (_("Invalid .debug_ranges data (inverted range)")); |
9277c30c UW |
13880 | return 0; |
13881 | } | |
13882 | ||
13883 | /* Empty range entries have no effect. */ | |
13884 | if (range_beginning == range_end) | |
13885 | continue; | |
13886 | ||
2b24b6e4 TT |
13887 | range_beginning += *base; |
13888 | range_end += *base; | |
43039443 | 13889 | |
01093045 DE |
13890 | /* A not-uncommon case of bad debug info. |
13891 | Don't pollute the addrmap with bad data. */ | |
13892 | if (range_beginning + baseaddr == 0 | |
5e22e966 | 13893 | && !per_objfile->per_bfd->has_section_at_zero) |
01093045 | 13894 | { |
b98664d3 | 13895 | complaint (_(".debug_ranges entry has start address of zero" |
4262abfb | 13896 | " [in module %s]"), objfile_name (objfile)); |
01093045 DE |
13897 | continue; |
13898 | } | |
13899 | ||
5f46c5a5 JK |
13900 | callback (range_beginning, range_end); |
13901 | } | |
13902 | ||
13903 | return 1; | |
13904 | } | |
13905 | ||
13906 | /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET. | |
13907 | Return 1 if the attributes are present and valid, otherwise, return 0. | |
efd7398e | 13908 | If RANGES_PST is not NULL we should set up the `psymtabs_addrmap'. */ |
5f46c5a5 JK |
13909 | |
13910 | static int | |
13911 | dwarf2_ranges_read (unsigned offset, CORE_ADDR *low_return, | |
13912 | CORE_ADDR *high_return, struct dwarf2_cu *cu, | |
d0ce17d8 | 13913 | dwarf2_psymtab *ranges_pst, dwarf_tag tag) |
5f46c5a5 | 13914 | { |
5e22e966 | 13915 | struct objfile *objfile = cu->per_objfile->objfile; |
84685904 | 13916 | dwarf2_per_bfd *per_bfd = cu->per_objfile->per_bfd; |
08feed99 | 13917 | struct gdbarch *gdbarch = objfile->arch (); |
b3b3bada | 13918 | const CORE_ADDR baseaddr = objfile->text_section_offset (); |
5f46c5a5 JK |
13919 | int low_set = 0; |
13920 | CORE_ADDR low = 0; | |
13921 | CORE_ADDR high = 0; | |
13922 | int retval; | |
13923 | ||
d0ce17d8 | 13924 | retval = dwarf2_ranges_process (offset, cu, tag, |
5f46c5a5 JK |
13925 | [&] (CORE_ADDR range_beginning, CORE_ADDR range_end) |
13926 | { | |
9277c30c | 13927 | if (ranges_pst != NULL) |
3e29f34a MR |
13928 | { |
13929 | CORE_ADDR lowpc; | |
13930 | CORE_ADDR highpc; | |
13931 | ||
79748972 TT |
13932 | lowpc = (gdbarch_adjust_dwarf2_addr (gdbarch, |
13933 | range_beginning + baseaddr) | |
13934 | - baseaddr); | |
13935 | highpc = (gdbarch_adjust_dwarf2_addr (gdbarch, | |
13936 | range_end + baseaddr) | |
13937 | - baseaddr); | |
84685904 | 13938 | addrmap_set_empty (per_bfd->partial_symtabs->psymtabs_addrmap, |
d320c2b5 | 13939 | lowpc, highpc - 1, ranges_pst); |
3e29f34a | 13940 | } |
ff013f42 | 13941 | |
43039443 JK |
13942 | /* FIXME: This is recording everything as a low-high |
13943 | segment of consecutive addresses. We should have a | |
13944 | data structure for discontiguous block ranges | |
13945 | instead. */ | |
13946 | if (! low_set) | |
13947 | { | |
13948 | low = range_beginning; | |
13949 | high = range_end; | |
13950 | low_set = 1; | |
13951 | } | |
13952 | else | |
13953 | { | |
13954 | if (range_beginning < low) | |
13955 | low = range_beginning; | |
13956 | if (range_end > high) | |
13957 | high = range_end; | |
13958 | } | |
5f46c5a5 JK |
13959 | }); |
13960 | if (!retval) | |
13961 | return 0; | |
43039443 JK |
13962 | |
13963 | if (! low_set) | |
13964 | /* If the first entry is an end-of-list marker, the range | |
13965 | describes an empty scope, i.e. no instructions. */ | |
13966 | return 0; | |
13967 | ||
13968 | if (low_return) | |
13969 | *low_return = low; | |
13970 | if (high_return) | |
13971 | *high_return = high; | |
13972 | return 1; | |
13973 | } | |
13974 | ||
3a2b436a JK |
13975 | /* Get low and high pc attributes from a die. See enum pc_bounds_kind |
13976 | definition for the return value. *LOWPC and *HIGHPC are set iff | |
e385593e | 13977 | neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */ |
380bca97 | 13978 | |
3a2b436a | 13979 | static enum pc_bounds_kind |
af34e669 | 13980 | dwarf2_get_pc_bounds (struct die_info *die, CORE_ADDR *lowpc, |
d85a05f0 | 13981 | CORE_ADDR *highpc, struct dwarf2_cu *cu, |
891813be | 13982 | dwarf2_psymtab *pst) |
c906108c | 13983 | { |
976ca316 | 13984 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
c906108c | 13985 | struct attribute *attr; |
91da1414 | 13986 | struct attribute *attr_high; |
af34e669 DJ |
13987 | CORE_ADDR low = 0; |
13988 | CORE_ADDR high = 0; | |
e385593e | 13989 | enum pc_bounds_kind ret; |
c906108c | 13990 | |
91da1414 MW |
13991 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
13992 | if (attr_high) | |
af34e669 | 13993 | { |
e142c38c | 13994 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 13995 | if (attr != nullptr) |
dda83cd7 | 13996 | { |
95f982e5 TT |
13997 | low = attr->as_address (); |
13998 | high = attr_high->as_address (); | |
cd6c91b4 | 13999 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 14000 | high += low; |
91da1414 | 14001 | } |
af34e669 DJ |
14002 | else |
14003 | /* Found high w/o low attribute. */ | |
e385593e | 14004 | return PC_BOUNDS_INVALID; |
af34e669 DJ |
14005 | |
14006 | /* Found consecutive range of addresses. */ | |
3a2b436a | 14007 | ret = PC_BOUNDS_HIGH_LOW; |
af34e669 | 14008 | } |
c906108c | 14009 | else |
af34e669 | 14010 | { |
e142c38c | 14011 | attr = dwarf2_attr (die, DW_AT_ranges, cu); |
529908cb | 14012 | if (attr != nullptr && attr->form_is_unsigned ()) |
af34e669 | 14013 | { |
2b0c7f41 SM |
14014 | /* Offset in the .debug_ranges or .debug_rnglist section (depending |
14015 | on DWARF version). */ | |
14016 | ULONGEST ranges_offset = attr->as_unsigned (); | |
14017 | ||
14018 | /* See dwarf2_cu::gnu_ranges_base's doc for why we might want to add | |
14019 | this value. */ | |
14020 | if (die->tag != DW_TAG_compile_unit) | |
14021 | ranges_offset += cu->gnu_ranges_base; | |
2e3cf129 | 14022 | |
af34e669 | 14023 | /* Value of the DW_AT_ranges attribute is the offset in the |
a604369a | 14024 | .debug_ranges section. */ |
d0ce17d8 CT |
14025 | if (!dwarf2_ranges_read (ranges_offset, &low, &high, cu, pst, |
14026 | die->tag)) | |
e385593e | 14027 | return PC_BOUNDS_INVALID; |
43039443 | 14028 | /* Found discontinuous range of addresses. */ |
3a2b436a | 14029 | ret = PC_BOUNDS_RANGES; |
af34e669 | 14030 | } |
e385593e JK |
14031 | else |
14032 | return PC_BOUNDS_NOT_PRESENT; | |
af34e669 | 14033 | } |
c906108c | 14034 | |
48fbe735 | 14035 | /* partial_die_info::read has also the strict LOW < HIGH requirement. */ |
9373cf26 | 14036 | if (high <= low) |
e385593e | 14037 | return PC_BOUNDS_INVALID; |
c906108c SS |
14038 | |
14039 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
14040 | eliminate duplicate copies of functions and vtables and such. | |
14041 | The linker will arbitrarily choose one and discard the others. | |
14042 | The AT_*_pc values for such functions refer to local labels in | |
14043 | these sections. If the section from that file was discarded, the | |
14044 | labels are not in the output, so the relocs get a value of 0. | |
14045 | If this is a discarded function, mark the pc bounds as invalid, | |
14046 | so that GDB will ignore it. */ | |
976ca316 | 14047 | if (low == 0 && !per_objfile->per_bfd->has_section_at_zero) |
e385593e | 14048 | return PC_BOUNDS_INVALID; |
c906108c SS |
14049 | |
14050 | *lowpc = low; | |
96408a79 SA |
14051 | if (highpc) |
14052 | *highpc = high; | |
af34e669 | 14053 | return ret; |
c906108c SS |
14054 | } |
14055 | ||
b084d499 JB |
14056 | /* Assuming that DIE represents a subprogram DIE or a lexical block, get |
14057 | its low and high PC addresses. Do nothing if these addresses could not | |
14058 | be determined. Otherwise, set LOWPC to the low address if it is smaller, | |
14059 | and HIGHPC to the high address if greater than HIGHPC. */ | |
14060 | ||
14061 | static void | |
14062 | dwarf2_get_subprogram_pc_bounds (struct die_info *die, | |
dda83cd7 SM |
14063 | CORE_ADDR *lowpc, CORE_ADDR *highpc, |
14064 | struct dwarf2_cu *cu) | |
b084d499 JB |
14065 | { |
14066 | CORE_ADDR low, high; | |
14067 | struct die_info *child = die->child; | |
14068 | ||
e385593e | 14069 | if (dwarf2_get_pc_bounds (die, &low, &high, cu, NULL) >= PC_BOUNDS_RANGES) |
b084d499 | 14070 | { |
325fac50 PA |
14071 | *lowpc = std::min (*lowpc, low); |
14072 | *highpc = std::max (*highpc, high); | |
b084d499 JB |
14073 | } |
14074 | ||
14075 | /* If the language does not allow nested subprograms (either inside | |
14076 | subprograms or lexical blocks), we're done. */ | |
14077 | if (cu->language != language_ada) | |
14078 | return; | |
6e70227d | 14079 | |
b084d499 JB |
14080 | /* Check all the children of the given DIE. If it contains nested |
14081 | subprograms, then check their pc bounds. Likewise, we need to | |
14082 | check lexical blocks as well, as they may also contain subprogram | |
14083 | definitions. */ | |
14084 | while (child && child->tag) | |
14085 | { | |
14086 | if (child->tag == DW_TAG_subprogram | |
dda83cd7 SM |
14087 | || child->tag == DW_TAG_lexical_block) |
14088 | dwarf2_get_subprogram_pc_bounds (child, lowpc, highpc, cu); | |
436c571c | 14089 | child = child->sibling; |
b084d499 JB |
14090 | } |
14091 | } | |
14092 | ||
fae299cd DC |
14093 | /* Get the low and high pc's represented by the scope DIE, and store |
14094 | them in *LOWPC and *HIGHPC. If the correct values can't be | |
14095 | determined, set *LOWPC to -1 and *HIGHPC to 0. */ | |
14096 | ||
14097 | static void | |
14098 | get_scope_pc_bounds (struct die_info *die, | |
14099 | CORE_ADDR *lowpc, CORE_ADDR *highpc, | |
14100 | struct dwarf2_cu *cu) | |
14101 | { | |
14102 | CORE_ADDR best_low = (CORE_ADDR) -1; | |
14103 | CORE_ADDR best_high = (CORE_ADDR) 0; | |
14104 | CORE_ADDR current_low, current_high; | |
14105 | ||
3a2b436a | 14106 | if (dwarf2_get_pc_bounds (die, ¤t_low, ¤t_high, cu, NULL) |
e385593e | 14107 | >= PC_BOUNDS_RANGES) |
fae299cd DC |
14108 | { |
14109 | best_low = current_low; | |
14110 | best_high = current_high; | |
14111 | } | |
14112 | else | |
14113 | { | |
14114 | struct die_info *child = die->child; | |
14115 | ||
14116 | while (child && child->tag) | |
14117 | { | |
14118 | switch (child->tag) { | |
14119 | case DW_TAG_subprogram: | |
dda83cd7 | 14120 | dwarf2_get_subprogram_pc_bounds (child, &best_low, &best_high, cu); |
fae299cd DC |
14121 | break; |
14122 | case DW_TAG_namespace: | |
f55ee35c | 14123 | case DW_TAG_module: |
fae299cd DC |
14124 | /* FIXME: carlton/2004-01-16: Should we do this for |
14125 | DW_TAG_class_type/DW_TAG_structure_type, too? I think | |
14126 | that current GCC's always emit the DIEs corresponding | |
14127 | to definitions of methods of classes as children of a | |
14128 | DW_TAG_compile_unit or DW_TAG_namespace (as opposed to | |
14129 | the DIEs giving the declarations, which could be | |
14130 | anywhere). But I don't see any reason why the | |
14131 | standards says that they have to be there. */ | |
14132 | get_scope_pc_bounds (child, ¤t_low, ¤t_high, cu); | |
14133 | ||
14134 | if (current_low != ((CORE_ADDR) -1)) | |
14135 | { | |
325fac50 PA |
14136 | best_low = std::min (best_low, current_low); |
14137 | best_high = std::max (best_high, current_high); | |
fae299cd DC |
14138 | } |
14139 | break; | |
14140 | default: | |
0963b4bd | 14141 | /* Ignore. */ |
fae299cd DC |
14142 | break; |
14143 | } | |
14144 | ||
436c571c | 14145 | child = child->sibling; |
fae299cd DC |
14146 | } |
14147 | } | |
14148 | ||
14149 | *lowpc = best_low; | |
14150 | *highpc = best_high; | |
14151 | } | |
14152 | ||
801e3a5b JB |
14153 | /* Record the address ranges for BLOCK, offset by BASEADDR, as given |
14154 | in DIE. */ | |
380bca97 | 14155 | |
801e3a5b JB |
14156 | static void |
14157 | dwarf2_record_block_ranges (struct die_info *die, struct block *block, | |
dda83cd7 | 14158 | CORE_ADDR baseaddr, struct dwarf2_cu *cu) |
801e3a5b | 14159 | { |
5e22e966 | 14160 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 14161 | struct gdbarch *gdbarch = objfile->arch (); |
801e3a5b | 14162 | struct attribute *attr; |
91da1414 | 14163 | struct attribute *attr_high; |
801e3a5b | 14164 | |
91da1414 MW |
14165 | attr_high = dwarf2_attr (die, DW_AT_high_pc, cu); |
14166 | if (attr_high) | |
801e3a5b | 14167 | { |
801e3a5b | 14168 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 14169 | if (attr != nullptr) |
dda83cd7 | 14170 | { |
95f982e5 TT |
14171 | CORE_ADDR low = attr->as_address (); |
14172 | CORE_ADDR high = attr_high->as_address (); | |
31aa7e4e | 14173 | |
cd6c91b4 | 14174 | if (cu->header.version >= 4 && attr_high->form_is_constant ()) |
31aa7e4e | 14175 | high += low; |
9a619af0 | 14176 | |
3e29f34a MR |
14177 | low = gdbarch_adjust_dwarf2_addr (gdbarch, low + baseaddr); |
14178 | high = gdbarch_adjust_dwarf2_addr (gdbarch, high + baseaddr); | |
c24bdb02 | 14179 | cu->get_builder ()->record_block_range (block, low, high - 1); |
dda83cd7 | 14180 | } |
801e3a5b JB |
14181 | } |
14182 | ||
14183 | attr = dwarf2_attr (die, DW_AT_ranges, cu); | |
529908cb | 14184 | if (attr != nullptr && attr->form_is_unsigned ()) |
801e3a5b | 14185 | { |
2b0c7f41 SM |
14186 | /* Offset in the .debug_ranges or .debug_rnglist section (depending |
14187 | on DWARF version). */ | |
14188 | ULONGEST ranges_offset = attr->as_unsigned (); | |
801e3a5b | 14189 | |
2b0c7f41 SM |
14190 | /* See dwarf2_cu::gnu_ranges_base's doc for why we might want to add |
14191 | this value. */ | |
14192 | if (die->tag != DW_TAG_compile_unit) | |
14193 | ranges_offset += cu->gnu_ranges_base; | |
801e3a5b | 14194 | |
2d5f09ec | 14195 | std::vector<blockrange> blockvec; |
2b0c7f41 | 14196 | dwarf2_ranges_process (ranges_offset, cu, die->tag, |
5f46c5a5 JK |
14197 | [&] (CORE_ADDR start, CORE_ADDR end) |
14198 | { | |
58fdfd2c JK |
14199 | start += baseaddr; |
14200 | end += baseaddr; | |
5f46c5a5 JK |
14201 | start = gdbarch_adjust_dwarf2_addr (gdbarch, start); |
14202 | end = gdbarch_adjust_dwarf2_addr (gdbarch, end); | |
c24bdb02 | 14203 | cu->get_builder ()->record_block_range (block, start, end - 1); |
2d5f09ec | 14204 | blockvec.emplace_back (start, end); |
5f46c5a5 | 14205 | }); |
2d5f09ec KB |
14206 | |
14207 | BLOCK_RANGES(block) = make_blockranges (objfile, blockvec); | |
801e3a5b JB |
14208 | } |
14209 | } | |
14210 | ||
685b1105 JK |
14211 | /* Check whether the producer field indicates either of GCC < 4.6, or the |
14212 | Intel C/C++ compiler, and cache the result in CU. */ | |
60d5a603 | 14213 | |
685b1105 JK |
14214 | static void |
14215 | check_producer (struct dwarf2_cu *cu) | |
60d5a603 | 14216 | { |
38360086 | 14217 | int major, minor; |
60d5a603 JK |
14218 | |
14219 | if (cu->producer == NULL) | |
14220 | { | |
14221 | /* For unknown compilers expect their behavior is DWARF version | |
14222 | compliant. | |
14223 | ||
14224 | GCC started to support .debug_types sections by -gdwarf-4 since | |
14225 | gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer | |
14226 | for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4 | |
14227 | combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility | |
14228 | interpreted incorrectly by GDB now - GCC PR debug/48229. */ | |
60d5a603 | 14229 | } |
b1ffba5a | 14230 | else if (producer_is_gcc (cu->producer, &major, &minor)) |
60d5a603 | 14231 | { |
38360086 MW |
14232 | cu->producer_is_gxx_lt_4_6 = major < 4 || (major == 4 && minor < 6); |
14233 | cu->producer_is_gcc_lt_4_3 = major < 4 || (major == 4 && minor < 3); | |
685b1105 | 14234 | } |
5230b05a | 14235 | else if (producer_is_icc (cu->producer, &major, &minor)) |
eb77c9df AB |
14236 | { |
14237 | cu->producer_is_icc = true; | |
14238 | cu->producer_is_icc_lt_14 = major < 14; | |
14239 | } | |
c258c396 JD |
14240 | else if (startswith (cu->producer, "CodeWarrior S12/L-ISA")) |
14241 | cu->producer_is_codewarrior = true; | |
685b1105 JK |
14242 | else |
14243 | { | |
14244 | /* For other non-GCC compilers, expect their behavior is DWARF version | |
14245 | compliant. */ | |
60d5a603 JK |
14246 | } |
14247 | ||
9068261f | 14248 | cu->checked_producer = true; |
685b1105 | 14249 | } |
ba919b58 | 14250 | |
685b1105 JK |
14251 | /* Check for GCC PR debug/45124 fix which is not present in any G++ version up |
14252 | to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed | |
14253 | during 4.6.0 experimental. */ | |
14254 | ||
9068261f | 14255 | static bool |
685b1105 JK |
14256 | producer_is_gxx_lt_4_6 (struct dwarf2_cu *cu) |
14257 | { | |
14258 | if (!cu->checked_producer) | |
14259 | check_producer (cu); | |
14260 | ||
14261 | return cu->producer_is_gxx_lt_4_6; | |
60d5a603 JK |
14262 | } |
14263 | ||
c258c396 JD |
14264 | |
14265 | /* Codewarrior (at least as of version 5.0.40) generates dwarf line information | |
14266 | with incorrect is_stmt attributes. */ | |
14267 | ||
14268 | static bool | |
14269 | producer_is_codewarrior (struct dwarf2_cu *cu) | |
14270 | { | |
14271 | if (!cu->checked_producer) | |
14272 | check_producer (cu); | |
14273 | ||
14274 | return cu->producer_is_codewarrior; | |
14275 | } | |
14276 | ||
bf23a268 TT |
14277 | /* Return the accessibility of DIE, as given by DW_AT_accessibility. |
14278 | If that attribute is not available, return the appropriate | |
14279 | default. */ | |
60d5a603 JK |
14280 | |
14281 | static enum dwarf_access_attribute | |
bf23a268 | 14282 | dwarf2_access_attribute (struct die_info *die, struct dwarf2_cu *cu) |
60d5a603 | 14283 | { |
bf23a268 TT |
14284 | attribute *attr = dwarf2_attr (die, DW_AT_accessibility, cu); |
14285 | if (attr != nullptr) | |
14286 | { | |
14287 | LONGEST value = attr->constant_value (-1); | |
14288 | if (value == DW_ACCESS_public | |
14289 | || value == DW_ACCESS_protected | |
14290 | || value == DW_ACCESS_private) | |
14291 | return (dwarf_access_attribute) value; | |
14292 | complaint (_("Unhandled DW_AT_accessibility value (%s)"), | |
14293 | plongest (value)); | |
14294 | } | |
14295 | ||
60d5a603 JK |
14296 | if (cu->header.version < 3 || producer_is_gxx_lt_4_6 (cu)) |
14297 | { | |
14298 | /* The default DWARF 2 accessibility for members is public, the default | |
14299 | accessibility for inheritance is private. */ | |
14300 | ||
14301 | if (die->tag != DW_TAG_inheritance) | |
14302 | return DW_ACCESS_public; | |
14303 | else | |
14304 | return DW_ACCESS_private; | |
14305 | } | |
14306 | else | |
14307 | { | |
14308 | /* DWARF 3+ defines the default accessibility a different way. The same | |
14309 | rules apply now for DW_TAG_inheritance as for the members and it only | |
14310 | depends on the container kind. */ | |
14311 | ||
14312 | if (die->parent->tag == DW_TAG_class_type) | |
14313 | return DW_ACCESS_private; | |
14314 | else | |
14315 | return DW_ACCESS_public; | |
14316 | } | |
14317 | } | |
14318 | ||
74ac6d43 TT |
14319 | /* Look for DW_AT_data_member_location. Set *OFFSET to the byte |
14320 | offset. If the attribute was not found return 0, otherwise return | |
14321 | 1. If it was found but could not properly be handled, set *OFFSET | |
14322 | to 0. */ | |
14323 | ||
14324 | static int | |
14325 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14326 | LONGEST *offset) | |
14327 | { | |
14328 | struct attribute *attr; | |
14329 | ||
14330 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14331 | if (attr != NULL) | |
14332 | { | |
14333 | *offset = 0; | |
14334 | ||
14335 | /* Note that we do not check for a section offset first here. | |
14336 | This is because DW_AT_data_member_location is new in DWARF 4, | |
14337 | so if we see it, we can assume that a constant form is really | |
14338 | a constant and not a section offset. */ | |
cd6c91b4 | 14339 | if (attr->form_is_constant ()) |
0826b30a | 14340 | *offset = attr->constant_value (0); |
cd6c91b4 | 14341 | else if (attr->form_is_section_offset ()) |
74ac6d43 | 14342 | dwarf2_complex_location_expr_complaint (); |
4fc6c0d5 | 14343 | else if (attr->form_is_block ()) |
9d2246fc | 14344 | *offset = decode_locdesc (attr->as_block (), cu); |
74ac6d43 TT |
14345 | else |
14346 | dwarf2_complex_location_expr_complaint (); | |
14347 | ||
14348 | return 1; | |
14349 | } | |
14350 | ||
14351 | return 0; | |
14352 | } | |
14353 | ||
7d79de9a TT |
14354 | /* Look for DW_AT_data_member_location and store the results in FIELD. */ |
14355 | ||
14356 | static void | |
14357 | handle_data_member_location (struct die_info *die, struct dwarf2_cu *cu, | |
14358 | struct field *field) | |
14359 | { | |
14360 | struct attribute *attr; | |
14361 | ||
14362 | attr = dwarf2_attr (die, DW_AT_data_member_location, cu); | |
14363 | if (attr != NULL) | |
14364 | { | |
14365 | if (attr->form_is_constant ()) | |
14366 | { | |
14367 | LONGEST offset = attr->constant_value (0); | |
14368 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); | |
14369 | } | |
14370 | else if (attr->form_is_section_offset ()) | |
14371 | dwarf2_complex_location_expr_complaint (); | |
14372 | else if (attr->form_is_block ()) | |
14373 | { | |
14374 | bool handled; | |
9d2246fc | 14375 | CORE_ADDR offset = decode_locdesc (attr->as_block (), cu, &handled); |
7d79de9a TT |
14376 | if (handled) |
14377 | SET_FIELD_BITPOS (*field, offset * bits_per_byte); | |
14378 | else | |
14379 | { | |
5e22e966 SM |
14380 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
14381 | struct objfile *objfile = per_objfile->objfile; | |
7d79de9a TT |
14382 | struct dwarf2_locexpr_baton *dlbaton |
14383 | = XOBNEW (&objfile->objfile_obstack, | |
14384 | struct dwarf2_locexpr_baton); | |
9d2246fc TT |
14385 | dlbaton->data = attr->as_block ()->data; |
14386 | dlbaton->size = attr->as_block ()->size; | |
7d79de9a TT |
14387 | /* When using this baton, we want to compute the address |
14388 | of the field, not the value. This is why | |
14389 | is_reference is set to false here. */ | |
14390 | dlbaton->is_reference = false; | |
5e22e966 | 14391 | dlbaton->per_objfile = per_objfile; |
7d79de9a TT |
14392 | dlbaton->per_cu = cu->per_cu; |
14393 | ||
14394 | SET_FIELD_DWARF_BLOCK (*field, dlbaton); | |
14395 | } | |
14396 | } | |
14397 | else | |
14398 | dwarf2_complex_location_expr_complaint (); | |
14399 | } | |
14400 | } | |
14401 | ||
c906108c SS |
14402 | /* Add an aggregate field to the field list. */ |
14403 | ||
14404 | static void | |
107d2387 | 14405 | dwarf2_add_field (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14406 | struct dwarf2_cu *cu) |
6e70227d | 14407 | { |
5e22e966 | 14408 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 14409 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
14410 | struct nextfield *new_field; |
14411 | struct attribute *attr; | |
14412 | struct field *fp; | |
15d034d0 | 14413 | const char *fieldname = ""; |
c906108c | 14414 | |
7d0ccb61 DJ |
14415 | if (die->tag == DW_TAG_inheritance) |
14416 | { | |
be2daae6 TT |
14417 | fip->baseclasses.emplace_back (); |
14418 | new_field = &fip->baseclasses.back (); | |
7d0ccb61 DJ |
14419 | } |
14420 | else | |
14421 | { | |
be2daae6 TT |
14422 | fip->fields.emplace_back (); |
14423 | new_field = &fip->fields.back (); | |
7d0ccb61 | 14424 | } |
be2daae6 | 14425 | |
9c6a1327 TT |
14426 | new_field->offset = die->sect_off; |
14427 | ||
bf23a268 | 14428 | new_field->accessibility = dwarf2_access_attribute (die, cu); |
c906108c | 14429 | if (new_field->accessibility != DW_ACCESS_public) |
264fc0e2 | 14430 | fip->non_public_fields = true; |
60d5a603 | 14431 | |
e142c38c | 14432 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); |
435d3d88 | 14433 | if (attr != nullptr) |
23dca5c3 | 14434 | new_field->virtuality = attr->as_virtuality (); |
60d5a603 JK |
14435 | else |
14436 | new_field->virtuality = DW_VIRTUALITY_none; | |
c906108c SS |
14437 | |
14438 | fp = &new_field->field; | |
a9a9bd0f | 14439 | |
e142c38c | 14440 | if (die->tag == DW_TAG_member && ! die_is_declaration (die, cu)) |
c906108c | 14441 | { |
a9a9bd0f | 14442 | /* Data member other than a C++ static data member. */ |
6e70227d | 14443 | |
c906108c | 14444 | /* Get type of field. */ |
5d14b6e5 | 14445 | fp->set_type (die_type (die, cu)); |
c906108c | 14446 | |
d6a843b5 | 14447 | SET_FIELD_BITPOS (*fp, 0); |
01ad7f36 | 14448 | |
c906108c | 14449 | /* Get bit size of field (zero if none). */ |
e142c38c | 14450 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); |
435d3d88 | 14451 | if (attr != nullptr) |
c906108c | 14452 | { |
529908cb | 14453 | FIELD_BITSIZE (*fp) = attr->constant_value (0); |
c906108c SS |
14454 | } |
14455 | else | |
14456 | { | |
14457 | FIELD_BITSIZE (*fp) = 0; | |
14458 | } | |
14459 | ||
14460 | /* Get bit offset of field. */ | |
7d79de9a | 14461 | handle_data_member_location (die, cu, fp); |
e142c38c | 14462 | attr = dwarf2_attr (die, DW_AT_bit_offset, cu); |
7c184d33 | 14463 | if (attr != nullptr && attr->form_is_constant ()) |
c906108c | 14464 | { |
d5a22e77 | 14465 | if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG) |
c906108c SS |
14466 | { |
14467 | /* For big endian bits, the DW_AT_bit_offset gives the | |
dda83cd7 SM |
14468 | additional bit offset from the MSB of the containing |
14469 | anonymous object to the MSB of the field. We don't | |
14470 | have to do anything special since we don't need to | |
14471 | know the size of the anonymous object. */ | |
529908cb | 14472 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) |
7c184d33 | 14473 | + attr->constant_value (0))); |
c906108c SS |
14474 | } |
14475 | else | |
14476 | { | |
14477 | /* For little endian bits, compute the bit offset to the | |
dda83cd7 SM |
14478 | MSB of the anonymous object, subtract off the number of |
14479 | bits from the MSB of the field to the MSB of the | |
14480 | object, and then subtract off the number of bits of | |
14481 | the field itself. The result is the bit offset of | |
14482 | the LSB of the field. */ | |
c906108c | 14483 | int anonymous_size; |
7c184d33 | 14484 | int bit_offset = attr->constant_value (0); |
c906108c | 14485 | |
e142c38c | 14486 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
7c184d33 | 14487 | if (attr != nullptr && attr->form_is_constant ()) |
c906108c SS |
14488 | { |
14489 | /* The size of the anonymous object containing | |
14490 | the bit field is explicit, so use the | |
14491 | indicated size (in bytes). */ | |
7c184d33 | 14492 | anonymous_size = attr->constant_value (0); |
c906108c SS |
14493 | } |
14494 | else | |
14495 | { | |
14496 | /* The size of the anonymous object containing | |
14497 | the bit field must be inferred from the type | |
14498 | attribute of the data member containing the | |
14499 | bit field. */ | |
5d14b6e5 | 14500 | anonymous_size = TYPE_LENGTH (fp->type ()); |
c906108c | 14501 | } |
f41f5e61 PA |
14502 | SET_FIELD_BITPOS (*fp, |
14503 | (FIELD_BITPOS (*fp) | |
14504 | + anonymous_size * bits_per_byte | |
14505 | - bit_offset - FIELD_BITSIZE (*fp))); | |
c906108c SS |
14506 | } |
14507 | } | |
da5b30da AA |
14508 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
14509 | if (attr != NULL) | |
14510 | SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) | |
0826b30a | 14511 | + attr->constant_value (0))); |
c906108c SS |
14512 | |
14513 | /* Get name of field. */ | |
39cbfefa DJ |
14514 | fieldname = dwarf2_name (die, cu); |
14515 | if (fieldname == NULL) | |
14516 | fieldname = ""; | |
d8151005 DJ |
14517 | |
14518 | /* The name is already allocated along with this objfile, so we don't | |
14519 | need to duplicate it for the type. */ | |
14520 | fp->name = fieldname; | |
c906108c SS |
14521 | |
14522 | /* Change accessibility for artificial fields (e.g. virtual table | |
dda83cd7 | 14523 | pointer or virtual base class pointer) to private. */ |
e142c38c | 14524 | if (dwarf2_attr (die, DW_AT_artificial, cu)) |
c906108c | 14525 | { |
d48cc9dd | 14526 | FIELD_ARTIFICIAL (*fp) = 1; |
c906108c | 14527 | new_field->accessibility = DW_ACCESS_private; |
264fc0e2 | 14528 | fip->non_public_fields = true; |
c906108c SS |
14529 | } |
14530 | } | |
a9a9bd0f | 14531 | else if (die->tag == DW_TAG_member || die->tag == DW_TAG_variable) |
c906108c | 14532 | { |
a9a9bd0f DC |
14533 | /* C++ static member. */ |
14534 | ||
14535 | /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that | |
14536 | is a declaration, but all versions of G++ as of this writing | |
14537 | (so through at least 3.2.1) incorrectly generate | |
14538 | DW_TAG_variable tags. */ | |
6e70227d | 14539 | |
ff355380 | 14540 | const char *physname; |
c906108c | 14541 | |
a9a9bd0f | 14542 | /* Get name of field. */ |
39cbfefa DJ |
14543 | fieldname = dwarf2_name (die, cu); |
14544 | if (fieldname == NULL) | |
c906108c SS |
14545 | return; |
14546 | ||
254e6b9e | 14547 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
3863f96c DE |
14548 | if (attr |
14549 | /* Only create a symbol if this is an external value. | |
14550 | new_symbol checks this and puts the value in the global symbol | |
14551 | table, which we want. If it is not external, new_symbol | |
14552 | will try to put the value in cu->list_in_scope which is wrong. */ | |
14553 | && dwarf2_flag_true_p (die, DW_AT_external, cu)) | |
254e6b9e DE |
14554 | { |
14555 | /* A static const member, not much different than an enum as far as | |
14556 | we're concerned, except that we can support more types. */ | |
14557 | new_symbol (die, NULL, cu); | |
14558 | } | |
14559 | ||
2df3850c | 14560 | /* Get physical name. */ |
ff355380 | 14561 | physname = dwarf2_physname (fieldname, die, cu); |
c906108c | 14562 | |
d8151005 DJ |
14563 | /* The name is already allocated along with this objfile, so we don't |
14564 | need to duplicate it for the type. */ | |
14565 | SET_FIELD_PHYSNAME (*fp, physname ? physname : ""); | |
5d14b6e5 | 14566 | fp->set_type (die_type (die, cu)); |
d8151005 | 14567 | FIELD_NAME (*fp) = fieldname; |
c906108c SS |
14568 | } |
14569 | else if (die->tag == DW_TAG_inheritance) | |
14570 | { | |
74ac6d43 | 14571 | /* C++ base class field. */ |
7d79de9a | 14572 | handle_data_member_location (die, cu, fp); |
c906108c | 14573 | FIELD_BITSIZE (*fp) = 0; |
5d14b6e5 SM |
14574 | fp->set_type (die_type (die, cu)); |
14575 | FIELD_NAME (*fp) = fp->type ()->name (); | |
c906108c | 14576 | } |
2ddeaf8a TT |
14577 | else |
14578 | gdb_assert_not_reached ("missing case in dwarf2_add_field"); | |
c906108c SS |
14579 | } |
14580 | ||
883fd55a KS |
14581 | /* Can the type given by DIE define another type? */ |
14582 | ||
14583 | static bool | |
14584 | type_can_define_types (const struct die_info *die) | |
14585 | { | |
14586 | switch (die->tag) | |
14587 | { | |
14588 | case DW_TAG_typedef: | |
14589 | case DW_TAG_class_type: | |
14590 | case DW_TAG_structure_type: | |
14591 | case DW_TAG_union_type: | |
14592 | case DW_TAG_enumeration_type: | |
14593 | return true; | |
14594 | ||
14595 | default: | |
14596 | return false; | |
14597 | } | |
14598 | } | |
14599 | ||
14600 | /* Add a type definition defined in the scope of the FIP's class. */ | |
98751a41 JK |
14601 | |
14602 | static void | |
883fd55a KS |
14603 | dwarf2_add_type_defn (struct field_info *fip, struct die_info *die, |
14604 | struct dwarf2_cu *cu) | |
6e70227d | 14605 | { |
be2daae6 TT |
14606 | struct decl_field fp; |
14607 | memset (&fp, 0, sizeof (fp)); | |
98751a41 | 14608 | |
883fd55a | 14609 | gdb_assert (type_can_define_types (die)); |
98751a41 | 14610 | |
883fd55a | 14611 | /* Get name of field. NULL is okay here, meaning an anonymous type. */ |
be2daae6 TT |
14612 | fp.name = dwarf2_name (die, cu); |
14613 | fp.type = read_type_die (die, cu); | |
98751a41 | 14614 | |
c191a687 | 14615 | /* Save accessibility. */ |
bf23a268 | 14616 | dwarf_access_attribute accessibility = dwarf2_access_attribute (die, cu); |
c191a687 KS |
14617 | switch (accessibility) |
14618 | { | |
14619 | case DW_ACCESS_public: | |
14620 | /* The assumed value if neither private nor protected. */ | |
14621 | break; | |
14622 | case DW_ACCESS_private: | |
be2daae6 | 14623 | fp.is_private = 1; |
c191a687 KS |
14624 | break; |
14625 | case DW_ACCESS_protected: | |
be2daae6 | 14626 | fp.is_protected = 1; |
c191a687 | 14627 | break; |
c191a687 KS |
14628 | } |
14629 | ||
883fd55a | 14630 | if (die->tag == DW_TAG_typedef) |
be2daae6 | 14631 | fip->typedef_field_list.push_back (fp); |
883fd55a | 14632 | else |
be2daae6 | 14633 | fip->nested_types_list.push_back (fp); |
98751a41 JK |
14634 | } |
14635 | ||
9c6a1327 TT |
14636 | /* A convenience typedef that's used when finding the discriminant |
14637 | field for a variant part. */ | |
1b95cdb7 SM |
14638 | typedef std::unordered_map<sect_offset, int, gdb::hash_enum<sect_offset>> |
14639 | offset_map_type; | |
9c6a1327 TT |
14640 | |
14641 | /* Compute the discriminant range for a given variant. OBSTACK is | |
14642 | where the results will be stored. VARIANT is the variant to | |
14643 | process. IS_UNSIGNED indicates whether the discriminant is signed | |
14644 | or unsigned. */ | |
14645 | ||
14646 | static const gdb::array_view<discriminant_range> | |
14647 | convert_variant_range (struct obstack *obstack, const variant_field &variant, | |
14648 | bool is_unsigned) | |
14649 | { | |
14650 | std::vector<discriminant_range> ranges; | |
14651 | ||
14652 | if (variant.default_branch) | |
14653 | return {}; | |
14654 | ||
14655 | if (variant.discr_list_data == nullptr) | |
14656 | { | |
14657 | discriminant_range r | |
14658 | = {variant.discriminant_value, variant.discriminant_value}; | |
14659 | ranges.push_back (r); | |
14660 | } | |
14661 | else | |
14662 | { | |
14663 | gdb::array_view<const gdb_byte> data (variant.discr_list_data->data, | |
14664 | variant.discr_list_data->size); | |
14665 | while (!data.empty ()) | |
14666 | { | |
14667 | if (data[0] != DW_DSC_range && data[0] != DW_DSC_label) | |
14668 | { | |
14669 | complaint (_("invalid discriminant marker: %d"), data[0]); | |
14670 | break; | |
14671 | } | |
14672 | bool is_range = data[0] == DW_DSC_range; | |
14673 | data = data.slice (1); | |
14674 | ||
14675 | ULONGEST low, high; | |
14676 | unsigned int bytes_read; | |
14677 | ||
14678 | if (data.empty ()) | |
14679 | { | |
14680 | complaint (_("DW_AT_discr_list missing low value")); | |
14681 | break; | |
14682 | } | |
14683 | if (is_unsigned) | |
14684 | low = read_unsigned_leb128 (nullptr, data.data (), &bytes_read); | |
14685 | else | |
14686 | low = (ULONGEST) read_signed_leb128 (nullptr, data.data (), | |
14687 | &bytes_read); | |
14688 | data = data.slice (bytes_read); | |
14689 | ||
14690 | if (is_range) | |
14691 | { | |
14692 | if (data.empty ()) | |
14693 | { | |
14694 | complaint (_("DW_AT_discr_list missing high value")); | |
14695 | break; | |
14696 | } | |
14697 | if (is_unsigned) | |
14698 | high = read_unsigned_leb128 (nullptr, data.data (), | |
14699 | &bytes_read); | |
14700 | else | |
14701 | high = (LONGEST) read_signed_leb128 (nullptr, data.data (), | |
14702 | &bytes_read); | |
14703 | data = data.slice (bytes_read); | |
14704 | } | |
14705 | else | |
14706 | high = low; | |
14707 | ||
14708 | ranges.push_back ({ low, high }); | |
14709 | } | |
14710 | } | |
14711 | ||
14712 | discriminant_range *result = XOBNEWVEC (obstack, discriminant_range, | |
14713 | ranges.size ()); | |
14714 | std::copy (ranges.begin (), ranges.end (), result); | |
14715 | return gdb::array_view<discriminant_range> (result, ranges.size ()); | |
14716 | } | |
14717 | ||
14718 | static const gdb::array_view<variant_part> create_variant_parts | |
14719 | (struct obstack *obstack, | |
14720 | const offset_map_type &offset_map, | |
14721 | struct field_info *fi, | |
14722 | const std::vector<variant_part_builder> &variant_parts); | |
14723 | ||
14724 | /* Fill in a "struct variant" for a given variant field. RESULT is | |
14725 | the variant to fill in. OBSTACK is where any needed allocations | |
14726 | will be done. OFFSET_MAP holds the mapping from section offsets to | |
14727 | fields for the type. FI describes the fields of the type we're | |
14728 | processing. FIELD is the variant field we're converting. */ | |
14729 | ||
14730 | static void | |
14731 | create_one_variant (variant &result, struct obstack *obstack, | |
14732 | const offset_map_type &offset_map, | |
14733 | struct field_info *fi, const variant_field &field) | |
14734 | { | |
14735 | result.discriminants = convert_variant_range (obstack, field, false); | |
14736 | result.first_field = field.first_field + fi->baseclasses.size (); | |
14737 | result.last_field = field.last_field + fi->baseclasses.size (); | |
14738 | result.parts = create_variant_parts (obstack, offset_map, fi, | |
14739 | field.variant_parts); | |
14740 | } | |
14741 | ||
14742 | /* Fill in a "struct variant_part" for a given variant part. RESULT | |
14743 | is the variant part to fill in. OBSTACK is where any needed | |
14744 | allocations will be done. OFFSET_MAP holds the mapping from | |
14745 | section offsets to fields for the type. FI describes the fields of | |
14746 | the type we're processing. BUILDER is the variant part to be | |
14747 | converted. */ | |
14748 | ||
14749 | static void | |
14750 | create_one_variant_part (variant_part &result, | |
14751 | struct obstack *obstack, | |
14752 | const offset_map_type &offset_map, | |
14753 | struct field_info *fi, | |
14754 | const variant_part_builder &builder) | |
14755 | { | |
14756 | auto iter = offset_map.find (builder.discriminant_offset); | |
14757 | if (iter == offset_map.end ()) | |
14758 | { | |
14759 | result.discriminant_index = -1; | |
14760 | /* Doesn't matter. */ | |
14761 | result.is_unsigned = false; | |
14762 | } | |
14763 | else | |
14764 | { | |
14765 | result.discriminant_index = iter->second; | |
14766 | result.is_unsigned | |
c6d940a9 | 14767 | = fi->fields[result.discriminant_index].field.type ()->is_unsigned (); |
9c6a1327 TT |
14768 | } |
14769 | ||
14770 | size_t n = builder.variants.size (); | |
14771 | variant *output = new (obstack) variant[n]; | |
14772 | for (size_t i = 0; i < n; ++i) | |
14773 | create_one_variant (output[i], obstack, offset_map, fi, | |
14774 | builder.variants[i]); | |
14775 | ||
14776 | result.variants = gdb::array_view<variant> (output, n); | |
14777 | } | |
14778 | ||
14779 | /* Create a vector of variant parts that can be attached to a type. | |
14780 | OBSTACK is where any needed allocations will be done. OFFSET_MAP | |
14781 | holds the mapping from section offsets to fields for the type. FI | |
14782 | describes the fields of the type we're processing. VARIANT_PARTS | |
14783 | is the vector to convert. */ | |
14784 | ||
14785 | static const gdb::array_view<variant_part> | |
14786 | create_variant_parts (struct obstack *obstack, | |
14787 | const offset_map_type &offset_map, | |
14788 | struct field_info *fi, | |
14789 | const std::vector<variant_part_builder> &variant_parts) | |
14790 | { | |
14791 | if (variant_parts.empty ()) | |
14792 | return {}; | |
14793 | ||
14794 | size_t n = variant_parts.size (); | |
14795 | variant_part *result = new (obstack) variant_part[n]; | |
14796 | for (size_t i = 0; i < n; ++i) | |
14797 | create_one_variant_part (result[i], obstack, offset_map, fi, | |
14798 | variant_parts[i]); | |
14799 | ||
14800 | return gdb::array_view<variant_part> (result, n); | |
14801 | } | |
14802 | ||
14803 | /* Compute the variant part vector for FIP, attaching it to TYPE when | |
14804 | done. */ | |
14805 | ||
14806 | static void | |
14807 | add_variant_property (struct field_info *fip, struct type *type, | |
14808 | struct dwarf2_cu *cu) | |
14809 | { | |
14810 | /* Map section offsets of fields to their field index. Note the | |
14811 | field index here does not take the number of baseclasses into | |
14812 | account. */ | |
14813 | offset_map_type offset_map; | |
14814 | for (int i = 0; i < fip->fields.size (); ++i) | |
14815 | offset_map[fip->fields[i].offset] = i; | |
14816 | ||
5e22e966 | 14817 | struct objfile *objfile = cu->per_objfile->objfile; |
9c6a1327 TT |
14818 | gdb::array_view<variant_part> parts |
14819 | = create_variant_parts (&objfile->objfile_obstack, offset_map, fip, | |
14820 | fip->variant_parts); | |
14821 | ||
14822 | struct dynamic_prop prop; | |
8c2e4e06 SM |
14823 | prop.set_variant_parts ((gdb::array_view<variant_part> *) |
14824 | obstack_copy (&objfile->objfile_obstack, &parts, | |
14825 | sizeof (parts))); | |
9c6a1327 | 14826 | |
5c54719c | 14827 | type->add_dyn_prop (DYN_PROP_VARIANT_PARTS, prop); |
9c6a1327 TT |
14828 | } |
14829 | ||
c906108c SS |
14830 | /* Create the vector of fields, and attach it to the type. */ |
14831 | ||
14832 | static void | |
fba45db2 | 14833 | dwarf2_attach_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 14834 | struct dwarf2_cu *cu) |
c906108c | 14835 | { |
317f7127 | 14836 | int nfields = fip->nfields (); |
c906108c SS |
14837 | |
14838 | /* Record the field count, allocate space for the array of fields, | |
14839 | and create blank accessibility bitfields if necessary. */ | |
5e33d5f4 | 14840 | type->set_num_fields (nfields); |
3cabb6b0 SM |
14841 | type->set_fields |
14842 | ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * nfields)); | |
c906108c | 14843 | |
b4ba55a1 | 14844 | if (fip->non_public_fields && cu->language != language_ada) |
c906108c SS |
14845 | { |
14846 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
14847 | ||
14848 | TYPE_FIELD_PRIVATE_BITS (type) = | |
14849 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14850 | B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type), nfields); | |
14851 | ||
14852 | TYPE_FIELD_PROTECTED_BITS (type) = | |
14853 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14854 | B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type), nfields); | |
14855 | ||
774b6a14 TT |
14856 | TYPE_FIELD_IGNORE_BITS (type) = |
14857 | (B_TYPE *) TYPE_ALLOC (type, B_BYTES (nfields)); | |
14858 | B_CLRALL (TYPE_FIELD_IGNORE_BITS (type), nfields); | |
c906108c SS |
14859 | } |
14860 | ||
14861 | /* If the type has baseclasses, allocate and clear a bit vector for | |
14862 | TYPE_FIELD_VIRTUAL_BITS. */ | |
be2daae6 | 14863 | if (!fip->baseclasses.empty () && cu->language != language_ada) |
c906108c | 14864 | { |
be2daae6 | 14865 | int num_bytes = B_BYTES (fip->baseclasses.size ()); |
fe1b8b76 | 14866 | unsigned char *pointer; |
c906108c SS |
14867 | |
14868 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
224c3ddb | 14869 | pointer = (unsigned char *) TYPE_ALLOC (type, num_bytes); |
fe1b8b76 | 14870 | TYPE_FIELD_VIRTUAL_BITS (type) = pointer; |
be2daae6 TT |
14871 | B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type), fip->baseclasses.size ()); |
14872 | TYPE_N_BASECLASSES (type) = fip->baseclasses.size (); | |
c906108c SS |
14873 | } |
14874 | ||
9c6a1327 TT |
14875 | if (!fip->variant_parts.empty ()) |
14876 | add_variant_property (fip, type, cu); | |
2ddeaf8a | 14877 | |
be2daae6 TT |
14878 | /* Copy the saved-up fields into the field vector. */ |
14879 | for (int i = 0; i < nfields; ++i) | |
c906108c | 14880 | { |
be2daae6 TT |
14881 | struct nextfield &field |
14882 | = ((i < fip->baseclasses.size ()) ? fip->baseclasses[i] | |
14883 | : fip->fields[i - fip->baseclasses.size ()]); | |
7d0ccb61 | 14884 | |
ceacbf6e | 14885 | type->field (i) = field.field; |
be2daae6 | 14886 | switch (field.accessibility) |
c906108c | 14887 | { |
c5aa993b | 14888 | case DW_ACCESS_private: |
b4ba55a1 | 14889 | if (cu->language != language_ada) |
be2daae6 | 14890 | SET_TYPE_FIELD_PRIVATE (type, i); |
c5aa993b | 14891 | break; |
c906108c | 14892 | |
c5aa993b | 14893 | case DW_ACCESS_protected: |
b4ba55a1 | 14894 | if (cu->language != language_ada) |
be2daae6 | 14895 | SET_TYPE_FIELD_PROTECTED (type, i); |
c5aa993b | 14896 | break; |
c906108c | 14897 | |
c5aa993b JM |
14898 | case DW_ACCESS_public: |
14899 | break; | |
c906108c | 14900 | |
c5aa993b JM |
14901 | default: |
14902 | /* Unknown accessibility. Complain and treat it as public. */ | |
14903 | { | |
b98664d3 | 14904 | complaint (_("unsupported accessibility %d"), |
be2daae6 | 14905 | field.accessibility); |
c5aa993b JM |
14906 | } |
14907 | break; | |
c906108c | 14908 | } |
be2daae6 | 14909 | if (i < fip->baseclasses.size ()) |
c906108c | 14910 | { |
be2daae6 | 14911 | switch (field.virtuality) |
c906108c | 14912 | { |
c5aa993b JM |
14913 | case DW_VIRTUALITY_virtual: |
14914 | case DW_VIRTUALITY_pure_virtual: | |
b4ba55a1 | 14915 | if (cu->language == language_ada) |
a73c6dcd | 14916 | error (_("unexpected virtuality in component of Ada type")); |
be2daae6 | 14917 | SET_TYPE_FIELD_VIRTUAL (type, i); |
c5aa993b | 14918 | break; |
c906108c SS |
14919 | } |
14920 | } | |
c906108c SS |
14921 | } |
14922 | } | |
14923 | ||
7d27a96d TT |
14924 | /* Return true if this member function is a constructor, false |
14925 | otherwise. */ | |
14926 | ||
14927 | static int | |
14928 | dwarf2_is_constructor (struct die_info *die, struct dwarf2_cu *cu) | |
14929 | { | |
14930 | const char *fieldname; | |
fe978cb0 | 14931 | const char *type_name; |
7d27a96d TT |
14932 | int len; |
14933 | ||
14934 | if (die->parent == NULL) | |
14935 | return 0; | |
14936 | ||
14937 | if (die->parent->tag != DW_TAG_structure_type | |
14938 | && die->parent->tag != DW_TAG_union_type | |
14939 | && die->parent->tag != DW_TAG_class_type) | |
14940 | return 0; | |
14941 | ||
14942 | fieldname = dwarf2_name (die, cu); | |
fe978cb0 PA |
14943 | type_name = dwarf2_name (die->parent, cu); |
14944 | if (fieldname == NULL || type_name == NULL) | |
7d27a96d TT |
14945 | return 0; |
14946 | ||
14947 | len = strlen (fieldname); | |
fe978cb0 PA |
14948 | return (strncmp (fieldname, type_name, len) == 0 |
14949 | && (type_name[len] == '\0' || type_name[len] == '<')); | |
7d27a96d TT |
14950 | } |
14951 | ||
c906108c SS |
14952 | /* Add a member function to the proper fieldlist. */ |
14953 | ||
14954 | static void | |
107d2387 | 14955 | dwarf2_add_member_fn (struct field_info *fip, struct die_info *die, |
e7c27a73 | 14956 | struct type *type, struct dwarf2_cu *cu) |
c906108c | 14957 | { |
5e22e966 | 14958 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 14959 | struct attribute *attr; |
c906108c | 14960 | int i; |
be2daae6 | 14961 | struct fnfieldlist *flp = nullptr; |
c906108c | 14962 | struct fn_field *fnp; |
15d034d0 | 14963 | const char *fieldname; |
f792889a | 14964 | struct type *this_type; |
c906108c | 14965 | |
b4ba55a1 | 14966 | if (cu->language == language_ada) |
a73c6dcd | 14967 | error (_("unexpected member function in Ada type")); |
b4ba55a1 | 14968 | |
2df3850c | 14969 | /* Get name of member function. */ |
39cbfefa DJ |
14970 | fieldname = dwarf2_name (die, cu); |
14971 | if (fieldname == NULL) | |
2df3850c | 14972 | return; |
c906108c | 14973 | |
c906108c | 14974 | /* Look up member function name in fieldlist. */ |
be2daae6 | 14975 | for (i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 14976 | { |
27bfe10e | 14977 | if (strcmp (fip->fnfieldlists[i].name, fieldname) == 0) |
be2daae6 TT |
14978 | { |
14979 | flp = &fip->fnfieldlists[i]; | |
14980 | break; | |
14981 | } | |
c906108c SS |
14982 | } |
14983 | ||
be2daae6 TT |
14984 | /* Create a new fnfieldlist if necessary. */ |
14985 | if (flp == nullptr) | |
c906108c | 14986 | { |
be2daae6 TT |
14987 | fip->fnfieldlists.emplace_back (); |
14988 | flp = &fip->fnfieldlists.back (); | |
c906108c | 14989 | flp->name = fieldname; |
be2daae6 | 14990 | i = fip->fnfieldlists.size () - 1; |
c906108c SS |
14991 | } |
14992 | ||
be2daae6 TT |
14993 | /* Create a new member function field and add it to the vector of |
14994 | fnfieldlists. */ | |
14995 | flp->fnfields.emplace_back (); | |
14996 | fnp = &flp->fnfields.back (); | |
3da10d80 KS |
14997 | |
14998 | /* Delay processing of the physname until later. */ | |
9c37b5ae | 14999 | if (cu->language == language_cplus) |
be2daae6 TT |
15000 | add_to_method_list (type, i, flp->fnfields.size () - 1, fieldname, |
15001 | die, cu); | |
3da10d80 KS |
15002 | else |
15003 | { | |
1d06ead6 | 15004 | const char *physname = dwarf2_physname (fieldname, die, cu); |
3da10d80 KS |
15005 | fnp->physname = physname ? physname : ""; |
15006 | } | |
15007 | ||
c906108c | 15008 | fnp->type = alloc_type (objfile); |
f792889a | 15009 | this_type = read_type_die (die, cu); |
78134374 | 15010 | if (this_type && this_type->code () == TYPE_CODE_FUNC) |
c906108c | 15011 | { |
1f704f76 | 15012 | int nparams = this_type->num_fields (); |
c906108c | 15013 | |
f792889a | 15014 | /* TYPE is the domain of this method, and THIS_TYPE is the type |
e26fb1d7 DC |
15015 | of the method itself (TYPE_CODE_METHOD). */ |
15016 | smash_to_method_type (fnp->type, type, | |
f792889a | 15017 | TYPE_TARGET_TYPE (this_type), |
80fc5e77 | 15018 | this_type->fields (), |
1f704f76 | 15019 | this_type->num_fields (), |
a409645d | 15020 | this_type->has_varargs ()); |
c906108c SS |
15021 | |
15022 | /* Handle static member functions. | |
dda83cd7 SM |
15023 | Dwarf2 has no clean way to discern C++ static and non-static |
15024 | member functions. G++ helps GDB by marking the first | |
15025 | parameter for non-static member functions (which is the this | |
15026 | pointer) as artificial. We obtain this information from | |
15027 | read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */ | |
f792889a | 15028 | if (nparams == 0 || TYPE_FIELD_ARTIFICIAL (this_type, 0) == 0) |
c906108c SS |
15029 | fnp->voffset = VOFFSET_STATIC; |
15030 | } | |
15031 | else | |
b98664d3 | 15032 | complaint (_("member function type missing for '%s'"), |
3da10d80 | 15033 | dwarf2_full_name (fieldname, die, cu)); |
c906108c SS |
15034 | |
15035 | /* Get fcontext from DW_AT_containing_type if present. */ | |
e142c38c | 15036 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
e7c27a73 | 15037 | fnp->fcontext = die_containing_type (die, cu); |
c906108c | 15038 | |
3e43a32a MS |
15039 | /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and |
15040 | is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */ | |
c906108c SS |
15041 | |
15042 | /* Get accessibility. */ | |
bf23a268 | 15043 | dwarf_access_attribute accessibility = dwarf2_access_attribute (die, cu); |
60d5a603 | 15044 | switch (accessibility) |
c906108c | 15045 | { |
60d5a603 JK |
15046 | case DW_ACCESS_private: |
15047 | fnp->is_private = 1; | |
15048 | break; | |
15049 | case DW_ACCESS_protected: | |
15050 | fnp->is_protected = 1; | |
15051 | break; | |
c906108c SS |
15052 | } |
15053 | ||
b02dede2 | 15054 | /* Check for artificial methods. */ |
e142c38c | 15055 | attr = dwarf2_attr (die, DW_AT_artificial, cu); |
c45bc3f8 | 15056 | if (attr && attr->as_boolean ()) |
b02dede2 DJ |
15057 | fnp->is_artificial = 1; |
15058 | ||
e35000a7 TBA |
15059 | /* Check for defaulted methods. */ |
15060 | attr = dwarf2_attr (die, DW_AT_defaulted, cu); | |
e8e5c158 TT |
15061 | if (attr != nullptr) |
15062 | fnp->defaulted = attr->defaulted (); | |
e35000a7 TBA |
15063 | |
15064 | /* Check for deleted methods. */ | |
15065 | attr = dwarf2_attr (die, DW_AT_deleted, cu); | |
c45bc3f8 | 15066 | if (attr != nullptr && attr->as_boolean ()) |
e35000a7 TBA |
15067 | fnp->is_deleted = 1; |
15068 | ||
7d27a96d TT |
15069 | fnp->is_constructor = dwarf2_is_constructor (die, cu); |
15070 | ||
0d564a31 | 15071 | /* Get index in virtual function table if it is a virtual member |
aec5aa8b TT |
15072 | function. For older versions of GCC, this is an offset in the |
15073 | appropriate virtual table, as specified by DW_AT_containing_type. | |
15074 | For everyone else, it is an expression to be evaluated relative | |
0d564a31 DJ |
15075 | to the object address. */ |
15076 | ||
e142c38c | 15077 | attr = dwarf2_attr (die, DW_AT_vtable_elem_location, cu); |
435d3d88 | 15078 | if (attr != nullptr) |
8e19ed76 | 15079 | { |
9d2246fc | 15080 | if (attr->form_is_block () && attr->as_block ()->size > 0) |
dda83cd7 | 15081 | { |
9d2246fc TT |
15082 | struct dwarf_block *block = attr->as_block (); |
15083 | ||
15084 | if (block->data[0] == DW_OP_constu) | |
aec5aa8b TT |
15085 | { |
15086 | /* Old-style GCC. */ | |
9d2246fc | 15087 | fnp->voffset = decode_locdesc (block, cu) + 2; |
aec5aa8b | 15088 | } |
9d2246fc TT |
15089 | else if (block->data[0] == DW_OP_deref |
15090 | || (block->size > 1 | |
15091 | && block->data[0] == DW_OP_deref_size | |
15092 | && block->data[1] == cu->header.addr_size)) | |
aec5aa8b | 15093 | { |
9d2246fc | 15094 | fnp->voffset = decode_locdesc (block, cu); |
aec5aa8b TT |
15095 | if ((fnp->voffset % cu->header.addr_size) != 0) |
15096 | dwarf2_complex_location_expr_complaint (); | |
15097 | else | |
15098 | fnp->voffset /= cu->header.addr_size; | |
15099 | fnp->voffset += 2; | |
15100 | } | |
15101 | else | |
15102 | dwarf2_complex_location_expr_complaint (); | |
15103 | ||
15104 | if (!fnp->fcontext) | |
7e993ebf KS |
15105 | { |
15106 | /* If there is no `this' field and no DW_AT_containing_type, | |
15107 | we cannot actually find a base class context for the | |
15108 | vtable! */ | |
1f704f76 | 15109 | if (this_type->num_fields () == 0 |
7e993ebf KS |
15110 | || !TYPE_FIELD_ARTIFICIAL (this_type, 0)) |
15111 | { | |
b98664d3 | 15112 | complaint (_("cannot determine context for virtual member " |
9d8780f0 SM |
15113 | "function \"%s\" (offset %s)"), |
15114 | fieldname, sect_offset_str (die->sect_off)); | |
7e993ebf KS |
15115 | } |
15116 | else | |
15117 | { | |
15118 | fnp->fcontext | |
940da03e | 15119 | = TYPE_TARGET_TYPE (this_type->field (0).type ()); |
7e993ebf KS |
15120 | } |
15121 | } | |
aec5aa8b | 15122 | } |
cd6c91b4 | 15123 | else if (attr->form_is_section_offset ()) |
dda83cd7 | 15124 | { |
4d3c2250 | 15125 | dwarf2_complex_location_expr_complaint (); |
dda83cd7 | 15126 | } |
8e19ed76 | 15127 | else |
dda83cd7 | 15128 | { |
4d3c2250 KB |
15129 | dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location", |
15130 | fieldname); | |
dda83cd7 | 15131 | } |
0d564a31 | 15132 | } |
d48cc9dd DJ |
15133 | else |
15134 | { | |
15135 | attr = dwarf2_attr (die, DW_AT_virtuality, cu); | |
23dca5c3 | 15136 | if (attr != nullptr && attr->as_virtuality () != DW_VIRTUALITY_none) |
d48cc9dd DJ |
15137 | { |
15138 | /* GCC does this, as of 2008-08-25; PR debug/37237. */ | |
b98664d3 | 15139 | complaint (_("Member function \"%s\" (offset %s) is virtual " |
3e43a32a | 15140 | "but the vtable offset is not specified"), |
9d8780f0 | 15141 | fieldname, sect_offset_str (die->sect_off)); |
9655fd1a | 15142 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
d48cc9dd DJ |
15143 | TYPE_CPLUS_DYNAMIC (type) = 1; |
15144 | } | |
15145 | } | |
c906108c SS |
15146 | } |
15147 | ||
15148 | /* Create the vector of member function fields, and attach it to the type. */ | |
15149 | ||
15150 | static void | |
fba45db2 | 15151 | dwarf2_attach_fn_fields_to_type (struct field_info *fip, struct type *type, |
e7c27a73 | 15152 | struct dwarf2_cu *cu) |
c906108c | 15153 | { |
b4ba55a1 | 15154 | if (cu->language == language_ada) |
a73c6dcd | 15155 | error (_("unexpected member functions in Ada type")); |
b4ba55a1 | 15156 | |
c906108c SS |
15157 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
15158 | TYPE_FN_FIELDLISTS (type) = (struct fn_fieldlist *) | |
be2daae6 TT |
15159 | TYPE_ALLOC (type, |
15160 | sizeof (struct fn_fieldlist) * fip->fnfieldlists.size ()); | |
c906108c | 15161 | |
be2daae6 | 15162 | for (int i = 0; i < fip->fnfieldlists.size (); i++) |
c906108c | 15163 | { |
be2daae6 | 15164 | struct fnfieldlist &nf = fip->fnfieldlists[i]; |
c906108c | 15165 | struct fn_fieldlist *fn_flp = &TYPE_FN_FIELDLIST (type, i); |
c906108c | 15166 | |
be2daae6 TT |
15167 | TYPE_FN_FIELDLIST_NAME (type, i) = nf.name; |
15168 | TYPE_FN_FIELDLIST_LENGTH (type, i) = nf.fnfields.size (); | |
c906108c | 15169 | fn_flp->fn_fields = (struct fn_field *) |
be2daae6 TT |
15170 | TYPE_ALLOC (type, sizeof (struct fn_field) * nf.fnfields.size ()); |
15171 | ||
15172 | for (int k = 0; k < nf.fnfields.size (); ++k) | |
15173 | fn_flp->fn_fields[k] = nf.fnfields[k]; | |
c906108c SS |
15174 | } |
15175 | ||
be2daae6 | 15176 | TYPE_NFN_FIELDS (type) = fip->fnfieldlists.size (); |
c906108c SS |
15177 | } |
15178 | ||
1168df01 JB |
15179 | /* Returns non-zero if NAME is the name of a vtable member in CU's |
15180 | language, zero otherwise. */ | |
15181 | static int | |
15182 | is_vtable_name (const char *name, struct dwarf2_cu *cu) | |
15183 | { | |
15184 | static const char vptr[] = "_vptr"; | |
15185 | ||
9c37b5ae TT |
15186 | /* Look for the C++ form of the vtable. */ |
15187 | if (startswith (name, vptr) && is_cplus_marker (name[sizeof (vptr) - 1])) | |
1168df01 JB |
15188 | return 1; |
15189 | ||
15190 | return 0; | |
15191 | } | |
15192 | ||
c0dd20ea | 15193 | /* GCC outputs unnamed structures that are really pointers to member |
0b92b5bb TT |
15194 | functions, with the ABI-specified layout. If TYPE describes |
15195 | such a structure, smash it into a member function type. | |
61049d3b DJ |
15196 | |
15197 | GCC shouldn't do this; it should just output pointer to member DIEs. | |
15198 | This is GCC PR debug/28767. */ | |
c0dd20ea | 15199 | |
0b92b5bb TT |
15200 | static void |
15201 | quirk_gcc_member_function_pointer (struct type *type, struct objfile *objfile) | |
c0dd20ea | 15202 | { |
09e2d7c7 | 15203 | struct type *pfn_type, *self_type, *new_type; |
c0dd20ea DJ |
15204 | |
15205 | /* Check for a structure with no name and two children. */ | |
1f704f76 | 15206 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) |
0b92b5bb | 15207 | return; |
c0dd20ea DJ |
15208 | |
15209 | /* Check for __pfn and __delta members. */ | |
0b92b5bb TT |
15210 | if (TYPE_FIELD_NAME (type, 0) == NULL |
15211 | || strcmp (TYPE_FIELD_NAME (type, 0), "__pfn") != 0 | |
15212 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15213 | || strcmp (TYPE_FIELD_NAME (type, 1), "__delta") != 0) | |
15214 | return; | |
c0dd20ea DJ |
15215 | |
15216 | /* Find the type of the method. */ | |
940da03e | 15217 | pfn_type = type->field (0).type (); |
c0dd20ea | 15218 | if (pfn_type == NULL |
78134374 SM |
15219 | || pfn_type->code () != TYPE_CODE_PTR |
15220 | || TYPE_TARGET_TYPE (pfn_type)->code () != TYPE_CODE_FUNC) | |
0b92b5bb | 15221 | return; |
c0dd20ea DJ |
15222 | |
15223 | /* Look for the "this" argument. */ | |
15224 | pfn_type = TYPE_TARGET_TYPE (pfn_type); | |
1f704f76 | 15225 | if (pfn_type->num_fields () == 0 |
940da03e SM |
15226 | /* || pfn_type->field (0).type () == NULL */ |
15227 | || pfn_type->field (0).type ()->code () != TYPE_CODE_PTR) | |
0b92b5bb | 15228 | return; |
c0dd20ea | 15229 | |
940da03e | 15230 | self_type = TYPE_TARGET_TYPE (pfn_type->field (0).type ()); |
0b92b5bb | 15231 | new_type = alloc_type (objfile); |
09e2d7c7 | 15232 | smash_to_method_type (new_type, self_type, TYPE_TARGET_TYPE (pfn_type), |
80fc5e77 | 15233 | pfn_type->fields (), pfn_type->num_fields (), |
a409645d | 15234 | pfn_type->has_varargs ()); |
0b92b5bb | 15235 | smash_to_methodptr_type (type, new_type); |
c0dd20ea | 15236 | } |
1168df01 | 15237 | |
e26624c6 TT |
15238 | /* Helper for quirk_ada_thick_pointer. If TYPE is an array type that |
15239 | requires rewriting, then copy it and return the updated copy. | |
15240 | Otherwise return nullptr. */ | |
15241 | ||
15242 | static struct type * | |
15243 | rewrite_array_type (struct type *type) | |
15244 | { | |
15245 | if (type->code () != TYPE_CODE_ARRAY) | |
15246 | return nullptr; | |
15247 | ||
15248 | struct type *index_type = type->index_type (); | |
15249 | range_bounds *current_bounds = index_type->bounds (); | |
15250 | ||
15251 | /* Handle multi-dimensional arrays. */ | |
15252 | struct type *new_target = rewrite_array_type (TYPE_TARGET_TYPE (type)); | |
15253 | if (new_target == nullptr) | |
15254 | { | |
15255 | /* Maybe we don't need to rewrite this array. */ | |
15256 | if (current_bounds->low.kind () == PROP_CONST | |
15257 | && current_bounds->high.kind () == PROP_CONST) | |
15258 | return nullptr; | |
15259 | } | |
15260 | ||
15261 | /* Either the target type was rewritten, or the bounds have to be | |
15262 | updated. Either way we want to copy the type and update | |
15263 | everything. */ | |
15264 | struct type *copy = copy_type (type); | |
15265 | int nfields = copy->num_fields (); | |
15266 | field *new_fields | |
15267 | = ((struct field *) TYPE_ZALLOC (copy, | |
15268 | nfields * sizeof (struct field))); | |
15269 | memcpy (new_fields, copy->fields (), nfields * sizeof (struct field)); | |
15270 | copy->set_fields (new_fields); | |
15271 | if (new_target != nullptr) | |
15272 | TYPE_TARGET_TYPE (copy) = new_target; | |
15273 | ||
15274 | struct type *index_copy = copy_type (index_type); | |
15275 | range_bounds *bounds | |
15276 | = (struct range_bounds *) TYPE_ZALLOC (index_copy, | |
15277 | sizeof (range_bounds)); | |
15278 | *bounds = *current_bounds; | |
15279 | bounds->low.set_const_val (1); | |
15280 | bounds->high.set_const_val (0); | |
15281 | index_copy->set_bounds (bounds); | |
15282 | copy->set_index_type (index_copy); | |
15283 | ||
15284 | return copy; | |
15285 | } | |
15286 | ||
57567375 TT |
15287 | /* While some versions of GCC will generate complicated DWARF for an |
15288 | array (see quirk_ada_thick_pointer), more recent versions were | |
15289 | modified to emit an explicit thick pointer structure. However, in | |
15290 | this case, the array still has DWARF expressions for its ranges, | |
15291 | and these must be ignored. */ | |
15292 | ||
15293 | static void | |
15294 | quirk_ada_thick_pointer_struct (struct die_info *die, struct dwarf2_cu *cu, | |
15295 | struct type *type) | |
15296 | { | |
15297 | gdb_assert (cu->language == language_ada); | |
15298 | ||
15299 | /* Check for a structure with two children. */ | |
15300 | if (type->code () != TYPE_CODE_STRUCT || type->num_fields () != 2) | |
15301 | return; | |
15302 | ||
15303 | /* Check for P_ARRAY and P_BOUNDS members. */ | |
15304 | if (TYPE_FIELD_NAME (type, 0) == NULL | |
15305 | || strcmp (TYPE_FIELD_NAME (type, 0), "P_ARRAY") != 0 | |
15306 | || TYPE_FIELD_NAME (type, 1) == NULL | |
15307 | || strcmp (TYPE_FIELD_NAME (type, 1), "P_BOUNDS") != 0) | |
15308 | return; | |
15309 | ||
15310 | /* Make sure we're looking at a pointer to an array. */ | |
15311 | if (type->field (0).type ()->code () != TYPE_CODE_PTR) | |
15312 | return; | |
57567375 | 15313 | |
e26624c6 TT |
15314 | /* The Ada code already knows how to handle these types, so all that |
15315 | we need to do is turn the bounds into static bounds. However, we | |
15316 | don't want to rewrite existing array or index types in-place, | |
15317 | because those may be referenced in other contexts where this | |
15318 | rewriting is undesirable. */ | |
15319 | struct type *new_ary_type | |
15320 | = rewrite_array_type (TYPE_TARGET_TYPE (type->field (0).type ())); | |
15321 | if (new_ary_type != nullptr) | |
15322 | type->field (0).set_type (lookup_pointer_type (new_ary_type)); | |
57567375 TT |
15323 | } |
15324 | ||
2b4424c3 TT |
15325 | /* If the DIE has a DW_AT_alignment attribute, return its value, doing |
15326 | appropriate error checking and issuing complaints if there is a | |
15327 | problem. */ | |
15328 | ||
15329 | static ULONGEST | |
15330 | get_alignment (struct dwarf2_cu *cu, struct die_info *die) | |
15331 | { | |
15332 | struct attribute *attr = dwarf2_attr (die, DW_AT_alignment, cu); | |
15333 | ||
15334 | if (attr == nullptr) | |
15335 | return 0; | |
15336 | ||
cd6c91b4 | 15337 | if (!attr->form_is_constant ()) |
2b4424c3 | 15338 | { |
b98664d3 | 15339 | complaint (_("DW_AT_alignment must have constant form" |
2b4424c3 TT |
15340 | " - DIE at %s [in module %s]"), |
15341 | sect_offset_str (die->sect_off), | |
5e22e966 | 15342 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 TT |
15343 | return 0; |
15344 | } | |
15345 | ||
529908cb TT |
15346 | LONGEST val = attr->constant_value (0); |
15347 | if (val < 0) | |
2b4424c3 | 15348 | { |
529908cb TT |
15349 | complaint (_("DW_AT_alignment value must not be negative" |
15350 | " - DIE at %s [in module %s]"), | |
15351 | sect_offset_str (die->sect_off), | |
15352 | objfile_name (cu->per_objfile->objfile)); | |
15353 | return 0; | |
2b4424c3 | 15354 | } |
529908cb | 15355 | ULONGEST align = val; |
2b4424c3 TT |
15356 | |
15357 | if (align == 0) | |
15358 | { | |
b98664d3 | 15359 | complaint (_("DW_AT_alignment value must not be zero" |
2b4424c3 TT |
15360 | " - DIE at %s [in module %s]"), |
15361 | sect_offset_str (die->sect_off), | |
5e22e966 | 15362 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 TT |
15363 | return 0; |
15364 | } | |
15365 | if ((align & (align - 1)) != 0) | |
15366 | { | |
b98664d3 | 15367 | complaint (_("DW_AT_alignment value must be a power of 2" |
2b4424c3 TT |
15368 | " - DIE at %s [in module %s]"), |
15369 | sect_offset_str (die->sect_off), | |
5e22e966 | 15370 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 TT |
15371 | return 0; |
15372 | } | |
15373 | ||
15374 | return align; | |
15375 | } | |
15376 | ||
15377 | /* If the DIE has a DW_AT_alignment attribute, use its value to set | |
15378 | the alignment for TYPE. */ | |
15379 | ||
15380 | static void | |
15381 | maybe_set_alignment (struct dwarf2_cu *cu, struct die_info *die, | |
15382 | struct type *type) | |
15383 | { | |
15384 | if (!set_type_align (type, get_alignment (cu, die))) | |
b98664d3 | 15385 | complaint (_("DW_AT_alignment value too large" |
2b4424c3 TT |
15386 | " - DIE at %s [in module %s]"), |
15387 | sect_offset_str (die->sect_off), | |
5e22e966 | 15388 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 | 15389 | } |
685b1105 | 15390 | |
e35000a7 TBA |
15391 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15392 | constant for a type, according to DWARF5 spec, Table 5.5. */ | |
15393 | ||
15394 | static bool | |
15395 | is_valid_DW_AT_calling_convention_for_type (ULONGEST value) | |
15396 | { | |
15397 | switch (value) | |
15398 | { | |
15399 | case DW_CC_normal: | |
15400 | case DW_CC_pass_by_reference: | |
15401 | case DW_CC_pass_by_value: | |
15402 | return true; | |
15403 | ||
15404 | default: | |
15405 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15406 | "(%s) for a type"), pulongest (value)); |
e35000a7 TBA |
15407 | return false; |
15408 | } | |
15409 | } | |
15410 | ||
d0922fcf TBA |
15411 | /* Check if the given VALUE is a valid enum dwarf_calling_convention |
15412 | constant for a subroutine, according to DWARF5 spec, Table 3.3, and | |
15413 | also according to GNU-specific values (see include/dwarf2.h). */ | |
15414 | ||
15415 | static bool | |
15416 | is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value) | |
15417 | { | |
15418 | switch (value) | |
15419 | { | |
15420 | case DW_CC_normal: | |
15421 | case DW_CC_program: | |
15422 | case DW_CC_nocall: | |
15423 | return true; | |
15424 | ||
15425 | case DW_CC_GNU_renesas_sh: | |
15426 | case DW_CC_GNU_borland_fastcall_i386: | |
15427 | case DW_CC_GDB_IBM_OpenCL: | |
15428 | return true; | |
15429 | ||
15430 | default: | |
15431 | complaint (_("unrecognized DW_AT_calling_convention value " | |
3142e908 | 15432 | "(%s) for a subroutine"), pulongest (value)); |
d0922fcf TBA |
15433 | return false; |
15434 | } | |
15435 | } | |
15436 | ||
c906108c | 15437 | /* Called when we find the DIE that starts a structure or union scope |
c767944b DJ |
15438 | (definition) to create a type for the structure or union. Fill in |
15439 | the type's name and general properties; the members will not be | |
83655187 DE |
15440 | processed until process_structure_scope. A symbol table entry for |
15441 | the type will also not be done until process_structure_scope (assuming | |
15442 | the type has a name). | |
c906108c | 15443 | |
c767944b DJ |
15444 | NOTE: we need to call these functions regardless of whether or not the |
15445 | DIE has a DW_AT_name attribute, since it might be an anonymous | |
c906108c | 15446 | structure or union. This gets the type entered into our set of |
83655187 | 15447 | user defined types. */ |
c906108c | 15448 | |
f792889a | 15449 | static struct type * |
134d01f1 | 15450 | read_structure_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 15451 | { |
5e22e966 | 15452 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c SS |
15453 | struct type *type; |
15454 | struct attribute *attr; | |
15d034d0 | 15455 | const char *name; |
c906108c | 15456 | |
348e048f DE |
15457 | /* If the definition of this type lives in .debug_types, read that type. |
15458 | Don't follow DW_AT_specification though, that will take us back up | |
15459 | the chain and we want to go down. */ | |
052c8bb8 | 15460 | attr = die->attr (DW_AT_signature); |
435d3d88 | 15461 | if (attr != nullptr) |
348e048f | 15462 | { |
ac9ec31b | 15463 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 15464 | |
ac9ec31b | 15465 | /* The type's CU may not be the same as CU. |
02142a6c | 15466 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
15467 | return set_die_type (die, type, cu); |
15468 | } | |
15469 | ||
c0dd20ea | 15470 | type = alloc_type (objfile); |
c906108c | 15471 | INIT_CPLUS_SPECIFIC (type); |
93311388 | 15472 | |
39cbfefa DJ |
15473 | name = dwarf2_name (die, cu); |
15474 | if (name != NULL) | |
c906108c | 15475 | { |
987504bb | 15476 | if (cu->language == language_cplus |
c44af4eb TT |
15477 | || cu->language == language_d |
15478 | || cu->language == language_rust) | |
63d06c5c | 15479 | { |
15d034d0 | 15480 | const char *full_name = dwarf2_full_name (name, die, cu); |
3da10d80 KS |
15481 | |
15482 | /* dwarf2_full_name might have already finished building the DIE's | |
15483 | type. If so, there is no need to continue. */ | |
15484 | if (get_die_type (die, cu) != NULL) | |
15485 | return get_die_type (die, cu); | |
15486 | ||
d0e39ea2 | 15487 | type->set_name (full_name); |
63d06c5c DC |
15488 | } |
15489 | else | |
15490 | { | |
d8151005 DJ |
15491 | /* The name is already allocated along with this objfile, so |
15492 | we don't need to duplicate it for the type. */ | |
d0e39ea2 | 15493 | type->set_name (name); |
63d06c5c | 15494 | } |
c906108c SS |
15495 | } |
15496 | ||
15497 | if (die->tag == DW_TAG_structure_type) | |
15498 | { | |
67607e24 | 15499 | type->set_code (TYPE_CODE_STRUCT); |
c906108c SS |
15500 | } |
15501 | else if (die->tag == DW_TAG_union_type) | |
15502 | { | |
67607e24 | 15503 | type->set_code (TYPE_CODE_UNION); |
c906108c SS |
15504 | } |
15505 | else | |
15506 | { | |
67607e24 | 15507 | type->set_code (TYPE_CODE_STRUCT); |
c906108c SS |
15508 | } |
15509 | ||
0cc2414c | 15510 | if (cu->language == language_cplus && die->tag == DW_TAG_class_type) |
aa70e35c | 15511 | type->set_is_declared_class (true); |
0cc2414c | 15512 | |
e35000a7 TBA |
15513 | /* Store the calling convention in the type if it's available in |
15514 | the die. Otherwise the calling convention remains set to | |
15515 | the default value DW_CC_normal. */ | |
15516 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
15517 | if (attr != nullptr | |
529908cb | 15518 | && is_valid_DW_AT_calling_convention_for_type (attr->constant_value (0))) |
e35000a7 TBA |
15519 | { |
15520 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15521 | TYPE_CPLUS_CALLING_CONVENTION (type) | |
529908cb | 15522 | = (enum dwarf_calling_convention) (attr->constant_value (0)); |
e35000a7 TBA |
15523 | } |
15524 | ||
e142c38c | 15525 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 15526 | if (attr != nullptr) |
c906108c | 15527 | { |
cd6c91b4 | 15528 | if (attr->form_is_constant ()) |
dda83cd7 | 15529 | TYPE_LENGTH (type) = attr->constant_value (0); |
155bfbd3 JB |
15530 | else |
15531 | { | |
f8e89861 | 15532 | struct dynamic_prop prop; |
293e7e51 | 15533 | if (attr_to_dynamic_prop (attr, die, cu, &prop, cu->addr_type ())) |
5c54719c | 15534 | type->add_dyn_prop (DYN_PROP_BYTE_SIZE, prop); |
dda83cd7 | 15535 | TYPE_LENGTH (type) = 0; |
155bfbd3 | 15536 | } |
c906108c SS |
15537 | } |
15538 | else | |
15539 | { | |
15540 | TYPE_LENGTH (type) = 0; | |
15541 | } | |
15542 | ||
2b4424c3 TT |
15543 | maybe_set_alignment (cu, die, type); |
15544 | ||
5230b05a | 15545 | if (producer_is_icc_lt_14 (cu) && (TYPE_LENGTH (type) == 0)) |
685b1105 | 15546 | { |
5230b05a WT |
15547 | /* ICC<14 does not output the required DW_AT_declaration on |
15548 | incomplete types, but gives them a size of zero. */ | |
b4b73759 | 15549 | type->set_is_stub (true); |
685b1105 JK |
15550 | } |
15551 | else | |
9baccff6 | 15552 | type->set_stub_is_supported (true); |
685b1105 | 15553 | |
dc718098 | 15554 | if (die_is_declaration (die, cu)) |
b4b73759 | 15555 | type->set_is_stub (true); |
a6c727b2 DJ |
15556 | else if (attr == NULL && die->child == NULL |
15557 | && producer_is_realview (cu->producer)) | |
15558 | /* RealView does not output the required DW_AT_declaration | |
15559 | on incomplete types. */ | |
b4b73759 | 15560 | type->set_is_stub (true); |
dc718098 | 15561 | |
c906108c SS |
15562 | /* We need to add the type field to the die immediately so we don't |
15563 | infinitely recurse when dealing with pointers to the structure | |
0963b4bd | 15564 | type within the structure itself. */ |
1c379e20 | 15565 | set_die_type (die, type, cu); |
c906108c | 15566 | |
7e314c57 JK |
15567 | /* set_die_type should be already done. */ |
15568 | set_descriptive_type (type, die, cu); | |
15569 | ||
c767944b DJ |
15570 | return type; |
15571 | } | |
15572 | ||
9c6a1327 TT |
15573 | static void handle_struct_member_die |
15574 | (struct die_info *child_die, | |
15575 | struct type *type, | |
15576 | struct field_info *fi, | |
15577 | std::vector<struct symbol *> *template_args, | |
15578 | struct dwarf2_cu *cu); | |
15579 | ||
15580 | /* A helper for handle_struct_member_die that handles | |
15581 | DW_TAG_variant_part. */ | |
15582 | ||
15583 | static void | |
15584 | handle_variant_part (struct die_info *die, struct type *type, | |
15585 | struct field_info *fi, | |
15586 | std::vector<struct symbol *> *template_args, | |
15587 | struct dwarf2_cu *cu) | |
15588 | { | |
15589 | variant_part_builder *new_part; | |
15590 | if (fi->current_variant_part == nullptr) | |
15591 | { | |
15592 | fi->variant_parts.emplace_back (); | |
15593 | new_part = &fi->variant_parts.back (); | |
15594 | } | |
15595 | else if (!fi->current_variant_part->processing_variant) | |
15596 | { | |
15597 | complaint (_("nested DW_TAG_variant_part seen " | |
15598 | "- DIE at %s [in module %s]"), | |
15599 | sect_offset_str (die->sect_off), | |
5e22e966 | 15600 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15601 | return; |
15602 | } | |
15603 | else | |
15604 | { | |
15605 | variant_field ¤t = fi->current_variant_part->variants.back (); | |
15606 | current.variant_parts.emplace_back (); | |
15607 | new_part = ¤t.variant_parts.back (); | |
15608 | } | |
15609 | ||
15610 | /* When we recurse, we want callees to add to this new variant | |
15611 | part. */ | |
15612 | scoped_restore save_current_variant_part | |
15613 | = make_scoped_restore (&fi->current_variant_part, new_part); | |
15614 | ||
15615 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr, cu); | |
15616 | if (discr == NULL) | |
15617 | { | |
15618 | /* It's a univariant form, an extension we support. */ | |
15619 | } | |
15620 | else if (discr->form_is_ref ()) | |
15621 | { | |
15622 | struct dwarf2_cu *target_cu = cu; | |
15623 | struct die_info *target_die = follow_die_ref (die, discr, &target_cu); | |
15624 | ||
15625 | new_part->discriminant_offset = target_die->sect_off; | |
15626 | } | |
15627 | else | |
15628 | { | |
15629 | complaint (_("DW_AT_discr does not have DIE reference form" | |
15630 | " - DIE at %s [in module %s]"), | |
15631 | sect_offset_str (die->sect_off), | |
5e22e966 | 15632 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15633 | } |
15634 | ||
15635 | for (die_info *child_die = die->child; | |
15636 | child_die != NULL; | |
15637 | child_die = child_die->sibling) | |
15638 | handle_struct_member_die (child_die, type, fi, template_args, cu); | |
15639 | } | |
15640 | ||
15641 | /* A helper for handle_struct_member_die that handles | |
15642 | DW_TAG_variant. */ | |
15643 | ||
15644 | static void | |
15645 | handle_variant (struct die_info *die, struct type *type, | |
15646 | struct field_info *fi, | |
15647 | std::vector<struct symbol *> *template_args, | |
15648 | struct dwarf2_cu *cu) | |
15649 | { | |
15650 | if (fi->current_variant_part == nullptr) | |
15651 | { | |
15652 | complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part " | |
15653 | "- DIE at %s [in module %s]"), | |
15654 | sect_offset_str (die->sect_off), | |
5e22e966 | 15655 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15656 | return; |
15657 | } | |
15658 | if (fi->current_variant_part->processing_variant) | |
15659 | { | |
15660 | complaint (_("nested DW_TAG_variant seen " | |
15661 | "- DIE at %s [in module %s]"), | |
15662 | sect_offset_str (die->sect_off), | |
5e22e966 | 15663 | objfile_name (cu->per_objfile->objfile)); |
9c6a1327 TT |
15664 | return; |
15665 | } | |
15666 | ||
15667 | scoped_restore save_processing_variant | |
15668 | = make_scoped_restore (&fi->current_variant_part->processing_variant, | |
15669 | true); | |
15670 | ||
15671 | fi->current_variant_part->variants.emplace_back (); | |
15672 | variant_field &variant = fi->current_variant_part->variants.back (); | |
15673 | variant.first_field = fi->fields.size (); | |
15674 | ||
15675 | /* In a variant we want to get the discriminant and also add a | |
15676 | field for our sole member child. */ | |
15677 | struct attribute *discr = dwarf2_attr (die, DW_AT_discr_value, cu); | |
cae21f8e | 15678 | if (discr == nullptr || !discr->form_is_constant ()) |
9c6a1327 TT |
15679 | { |
15680 | discr = dwarf2_attr (die, DW_AT_discr_list, cu); | |
9d2246fc | 15681 | if (discr == nullptr || discr->as_block ()->size == 0) |
9c6a1327 TT |
15682 | variant.default_branch = true; |
15683 | else | |
9d2246fc | 15684 | variant.discr_list_data = discr->as_block (); |
9c6a1327 TT |
15685 | } |
15686 | else | |
cae21f8e | 15687 | variant.discriminant_value = discr->constant_value (0); |
9c6a1327 TT |
15688 | |
15689 | for (die_info *variant_child = die->child; | |
15690 | variant_child != NULL; | |
15691 | variant_child = variant_child->sibling) | |
15692 | handle_struct_member_die (variant_child, type, fi, template_args, cu); | |
15693 | ||
15694 | variant.last_field = fi->fields.size (); | |
15695 | } | |
15696 | ||
2ddeaf8a TT |
15697 | /* A helper for process_structure_scope that handles a single member |
15698 | DIE. */ | |
15699 | ||
15700 | static void | |
15701 | handle_struct_member_die (struct die_info *child_die, struct type *type, | |
15702 | struct field_info *fi, | |
15703 | std::vector<struct symbol *> *template_args, | |
15704 | struct dwarf2_cu *cu) | |
15705 | { | |
15706 | if (child_die->tag == DW_TAG_member | |
9c6a1327 | 15707 | || child_die->tag == DW_TAG_variable) |
2ddeaf8a TT |
15708 | { |
15709 | /* NOTE: carlton/2002-11-05: A C++ static data member | |
15710 | should be a DW_TAG_member that is a declaration, but | |
15711 | all versions of G++ as of this writing (so through at | |
15712 | least 3.2.1) incorrectly generate DW_TAG_variable | |
15713 | tags for them instead. */ | |
15714 | dwarf2_add_field (fi, child_die, cu); | |
15715 | } | |
15716 | else if (child_die->tag == DW_TAG_subprogram) | |
15717 | { | |
15718 | /* Rust doesn't have member functions in the C++ sense. | |
15719 | However, it does emit ordinary functions as children | |
15720 | of a struct DIE. */ | |
15721 | if (cu->language == language_rust) | |
15722 | read_func_scope (child_die, cu); | |
15723 | else | |
15724 | { | |
15725 | /* C++ member function. */ | |
15726 | dwarf2_add_member_fn (fi, child_die, type, cu); | |
15727 | } | |
15728 | } | |
15729 | else if (child_die->tag == DW_TAG_inheritance) | |
15730 | { | |
15731 | /* C++ base class field. */ | |
15732 | dwarf2_add_field (fi, child_die, cu); | |
15733 | } | |
15734 | else if (type_can_define_types (child_die)) | |
15735 | dwarf2_add_type_defn (fi, child_die, cu); | |
15736 | else if (child_die->tag == DW_TAG_template_type_param | |
15737 | || child_die->tag == DW_TAG_template_value_param) | |
15738 | { | |
15739 | struct symbol *arg = new_symbol (child_die, NULL, cu); | |
15740 | ||
15741 | if (arg != NULL) | |
15742 | template_args->push_back (arg); | |
15743 | } | |
9c6a1327 TT |
15744 | else if (child_die->tag == DW_TAG_variant_part) |
15745 | handle_variant_part (child_die, type, fi, template_args, cu); | |
2ddeaf8a | 15746 | else if (child_die->tag == DW_TAG_variant) |
9c6a1327 | 15747 | handle_variant (child_die, type, fi, template_args, cu); |
2ddeaf8a TT |
15748 | } |
15749 | ||
c767944b DJ |
15750 | /* Finish creating a structure or union type, including filling in |
15751 | its members and creating a symbol for it. */ | |
15752 | ||
15753 | static void | |
15754 | process_structure_scope (struct die_info *die, struct dwarf2_cu *cu) | |
15755 | { | |
5e22e966 | 15756 | struct objfile *objfile = cu->per_objfile->objfile; |
ca040673 | 15757 | struct die_info *child_die; |
c767944b DJ |
15758 | struct type *type; |
15759 | ||
15760 | type = get_die_type (die, cu); | |
15761 | if (type == NULL) | |
15762 | type = read_structure_type (die, cu); | |
15763 | ||
3e1d3d8c | 15764 | bool has_template_parameters = false; |
e142c38c | 15765 | if (die->child != NULL && ! die_is_declaration (die, cu)) |
c906108c SS |
15766 | { |
15767 | struct field_info fi; | |
2f4732b0 | 15768 | std::vector<struct symbol *> template_args; |
c906108c | 15769 | |
639d11d3 | 15770 | child_die = die->child; |
c906108c SS |
15771 | |
15772 | while (child_die && child_die->tag) | |
15773 | { | |
2ddeaf8a | 15774 | handle_struct_member_die (child_die, type, &fi, &template_args, cu); |
436c571c | 15775 | child_die = child_die->sibling; |
c906108c SS |
15776 | } |
15777 | ||
34eaf542 | 15778 | /* Attach template arguments to type. */ |
2f4732b0 | 15779 | if (!template_args.empty ()) |
34eaf542 | 15780 | { |
3e1d3d8c | 15781 | has_template_parameters = true; |
34eaf542 | 15782 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
2f4732b0 | 15783 | TYPE_N_TEMPLATE_ARGUMENTS (type) = template_args.size (); |
34eaf542 | 15784 | TYPE_TEMPLATE_ARGUMENTS (type) |
8d749320 SM |
15785 | = XOBNEWVEC (&objfile->objfile_obstack, |
15786 | struct symbol *, | |
15787 | TYPE_N_TEMPLATE_ARGUMENTS (type)); | |
34eaf542 | 15788 | memcpy (TYPE_TEMPLATE_ARGUMENTS (type), |
2f4732b0 | 15789 | template_args.data (), |
34eaf542 TT |
15790 | (TYPE_N_TEMPLATE_ARGUMENTS (type) |
15791 | * sizeof (struct symbol *))); | |
34eaf542 TT |
15792 | } |
15793 | ||
c906108c | 15794 | /* Attach fields and member functions to the type. */ |
317f7127 | 15795 | if (fi.nfields () > 0) |
e7c27a73 | 15796 | dwarf2_attach_fields_to_type (&fi, type, cu); |
be2daae6 | 15797 | if (!fi.fnfieldlists.empty ()) |
c906108c | 15798 | { |
e7c27a73 | 15799 | dwarf2_attach_fn_fields_to_type (&fi, type, cu); |
c906108c | 15800 | |
c5aa993b | 15801 | /* Get the type which refers to the base class (possibly this |
c906108c | 15802 | class itself) which contains the vtable pointer for the current |
0d564a31 DJ |
15803 | class from the DW_AT_containing_type attribute. This use of |
15804 | DW_AT_containing_type is a GNU extension. */ | |
c906108c | 15805 | |
e142c38c | 15806 | if (dwarf2_attr (die, DW_AT_containing_type, cu) != NULL) |
c906108c | 15807 | { |
e7c27a73 | 15808 | struct type *t = die_containing_type (die, cu); |
c906108c | 15809 | |
ae6ae975 | 15810 | set_type_vptr_basetype (type, t); |
c906108c SS |
15811 | if (type == t) |
15812 | { | |
c906108c SS |
15813 | int i; |
15814 | ||
15815 | /* Our own class provides vtbl ptr. */ | |
1f704f76 | 15816 | for (i = t->num_fields () - 1; |
c906108c SS |
15817 | i >= TYPE_N_BASECLASSES (t); |
15818 | --i) | |
15819 | { | |
0d5cff50 | 15820 | const char *fieldname = TYPE_FIELD_NAME (t, i); |
c906108c | 15821 | |
dda83cd7 | 15822 | if (is_vtable_name (fieldname, cu)) |
c906108c | 15823 | { |
ae6ae975 | 15824 | set_type_vptr_fieldno (type, i); |
c906108c SS |
15825 | break; |
15826 | } | |
15827 | } | |
15828 | ||
15829 | /* Complain if virtual function table field not found. */ | |
15830 | if (i < TYPE_N_BASECLASSES (t)) | |
b98664d3 | 15831 | complaint (_("virtual function table pointer " |
3e43a32a | 15832 | "not found when defining class '%s'"), |
7d93a1e0 | 15833 | type->name () ? type->name () : ""); |
c906108c SS |
15834 | } |
15835 | else | |
15836 | { | |
ae6ae975 | 15837 | set_type_vptr_fieldno (type, TYPE_VPTR_FIELDNO (t)); |
c906108c SS |
15838 | } |
15839 | } | |
f6235d4c | 15840 | else if (cu->producer |
61012eef | 15841 | && startswith (cu->producer, "IBM(R) XL C/C++ Advanced Edition")) |
f6235d4c EZ |
15842 | { |
15843 | /* The IBM XLC compiler does not provide direct indication | |
dda83cd7 SM |
15844 | of the containing type, but the vtable pointer is |
15845 | always named __vfp. */ | |
f6235d4c EZ |
15846 | |
15847 | int i; | |
15848 | ||
1f704f76 | 15849 | for (i = type->num_fields () - 1; |
f6235d4c EZ |
15850 | i >= TYPE_N_BASECLASSES (type); |
15851 | --i) | |
15852 | { | |
15853 | if (strcmp (TYPE_FIELD_NAME (type, i), "__vfp") == 0) | |
15854 | { | |
ae6ae975 DE |
15855 | set_type_vptr_fieldno (type, i); |
15856 | set_type_vptr_basetype (type, type); | |
f6235d4c EZ |
15857 | break; |
15858 | } | |
15859 | } | |
15860 | } | |
c906108c | 15861 | } |
98751a41 JK |
15862 | |
15863 | /* Copy fi.typedef_field_list linked list elements content into the | |
15864 | allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */ | |
be2daae6 | 15865 | if (!fi.typedef_field_list.empty ()) |
98751a41 | 15866 | { |
be2daae6 | 15867 | int count = fi.typedef_field_list.size (); |
98751a41 | 15868 | |
a0d7a4ff | 15869 | ALLOCATE_CPLUS_STRUCT_TYPE (type); |
98751a41 | 15870 | TYPE_TYPEDEF_FIELD_ARRAY (type) |
883fd55a | 15871 | = ((struct decl_field *) |
be2daae6 TT |
15872 | TYPE_ALLOC (type, |
15873 | sizeof (TYPE_TYPEDEF_FIELD (type, 0)) * count)); | |
15874 | TYPE_TYPEDEF_FIELD_COUNT (type) = count; | |
6e70227d | 15875 | |
be2daae6 TT |
15876 | for (int i = 0; i < fi.typedef_field_list.size (); ++i) |
15877 | TYPE_TYPEDEF_FIELD (type, i) = fi.typedef_field_list[i]; | |
98751a41 | 15878 | } |
c767944b | 15879 | |
883fd55a KS |
15880 | /* Copy fi.nested_types_list linked list elements content into the |
15881 | allocated array TYPE_NESTED_TYPES_ARRAY (type). */ | |
be2daae6 | 15882 | if (!fi.nested_types_list.empty () && cu->language != language_ada) |
883fd55a | 15883 | { |
be2daae6 | 15884 | int count = fi.nested_types_list.size (); |
883fd55a KS |
15885 | |
15886 | ALLOCATE_CPLUS_STRUCT_TYPE (type); | |
15887 | TYPE_NESTED_TYPES_ARRAY (type) | |
15888 | = ((struct decl_field *) | |
be2daae6 TT |
15889 | TYPE_ALLOC (type, sizeof (struct decl_field) * count)); |
15890 | TYPE_NESTED_TYPES_COUNT (type) = count; | |
883fd55a | 15891 | |
be2daae6 TT |
15892 | for (int i = 0; i < fi.nested_types_list.size (); ++i) |
15893 | TYPE_NESTED_TYPES_FIELD (type, i) = fi.nested_types_list[i]; | |
883fd55a | 15894 | } |
c906108c | 15895 | } |
63d06c5c | 15896 | |
bb5ed363 | 15897 | quirk_gcc_member_function_pointer (type, objfile); |
c9317f21 TT |
15898 | if (cu->language == language_rust && die->tag == DW_TAG_union_type) |
15899 | cu->rust_unions.push_back (type); | |
57567375 TT |
15900 | else if (cu->language == language_ada) |
15901 | quirk_ada_thick_pointer_struct (die, cu, type); | |
0b92b5bb | 15902 | |
90aeadfc DC |
15903 | /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its |
15904 | snapshots) has been known to create a die giving a declaration | |
15905 | for a class that has, as a child, a die giving a definition for a | |
15906 | nested class. So we have to process our children even if the | |
15907 | current die is a declaration. Normally, of course, a declaration | |
15908 | won't have any children at all. */ | |
134d01f1 | 15909 | |
ca040673 DE |
15910 | child_die = die->child; |
15911 | ||
90aeadfc DC |
15912 | while (child_die != NULL && child_die->tag) |
15913 | { | |
15914 | if (child_die->tag == DW_TAG_member | |
15915 | || child_die->tag == DW_TAG_variable | |
34eaf542 TT |
15916 | || child_die->tag == DW_TAG_inheritance |
15917 | || child_die->tag == DW_TAG_template_value_param | |
15918 | || child_die->tag == DW_TAG_template_type_param) | |
134d01f1 | 15919 | { |
90aeadfc | 15920 | /* Do nothing. */ |
134d01f1 | 15921 | } |
90aeadfc DC |
15922 | else |
15923 | process_die (child_die, cu); | |
134d01f1 | 15924 | |
436c571c | 15925 | child_die = child_die->sibling; |
134d01f1 DJ |
15926 | } |
15927 | ||
fa4028e9 JB |
15928 | /* Do not consider external references. According to the DWARF standard, |
15929 | these DIEs are identified by the fact that they have no byte_size | |
15930 | attribute, and a declaration attribute. */ | |
15931 | if (dwarf2_attr (die, DW_AT_byte_size, cu) != NULL | |
15cd93d0 TV |
15932 | || !die_is_declaration (die, cu) |
15933 | || dwarf2_attr (die, DW_AT_signature, cu) != NULL) | |
3e1d3d8c TT |
15934 | { |
15935 | struct symbol *sym = new_symbol (die, type, cu); | |
15936 | ||
15937 | if (has_template_parameters) | |
15938 | { | |
a776957c TT |
15939 | struct symtab *symtab; |
15940 | if (sym != nullptr) | |
15941 | symtab = symbol_symtab (sym); | |
15942 | else if (cu->line_header != nullptr) | |
15943 | { | |
15944 | /* Any related symtab will do. */ | |
15945 | symtab | |
7ba99d21 | 15946 | = cu->line_header->file_names ()[0].symtab; |
a776957c TT |
15947 | } |
15948 | else | |
15949 | { | |
15950 | symtab = nullptr; | |
15951 | complaint (_("could not find suitable " | |
15952 | "symtab for template parameter" | |
15953 | " - DIE at %s [in module %s]"), | |
15954 | sect_offset_str (die->sect_off), | |
15955 | objfile_name (objfile)); | |
15956 | } | |
15957 | ||
15958 | if (symtab != nullptr) | |
15959 | { | |
15960 | /* Make sure that the symtab is set on the new symbols. | |
15961 | Even though they don't appear in this symtab directly, | |
15962 | other parts of gdb assume that symbols do, and this is | |
15963 | reasonably true. */ | |
15964 | for (int i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (type); ++i) | |
15965 | symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type, i), symtab); | |
15966 | } | |
3e1d3d8c TT |
15967 | } |
15968 | } | |
134d01f1 DJ |
15969 | } |
15970 | ||
ed6acedd TT |
15971 | /* Assuming DIE is an enumeration type, and TYPE is its associated |
15972 | type, update TYPE using some information only available in DIE's | |
15973 | children. In particular, the fields are computed. */ | |
55426c9d JB |
15974 | |
15975 | static void | |
15976 | update_enumeration_type_from_children (struct die_info *die, | |
15977 | struct type *type, | |
15978 | struct dwarf2_cu *cu) | |
15979 | { | |
60f7655a | 15980 | struct die_info *child_die; |
55426c9d JB |
15981 | int unsigned_enum = 1; |
15982 | int flag_enum = 1; | |
55426c9d | 15983 | |
8268c778 | 15984 | auto_obstack obstack; |
ed6acedd | 15985 | std::vector<struct field> fields; |
55426c9d | 15986 | |
60f7655a DE |
15987 | for (child_die = die->child; |
15988 | child_die != NULL && child_die->tag; | |
436c571c | 15989 | child_die = child_die->sibling) |
55426c9d JB |
15990 | { |
15991 | struct attribute *attr; | |
15992 | LONGEST value; | |
15993 | const gdb_byte *bytes; | |
15994 | struct dwarf2_locexpr_baton *baton; | |
15995 | const char *name; | |
60f7655a | 15996 | |
55426c9d JB |
15997 | if (child_die->tag != DW_TAG_enumerator) |
15998 | continue; | |
15999 | ||
16000 | attr = dwarf2_attr (child_die, DW_AT_const_value, cu); | |
16001 | if (attr == NULL) | |
16002 | continue; | |
16003 | ||
16004 | name = dwarf2_name (child_die, cu); | |
16005 | if (name == NULL) | |
16006 | name = "<anonymous enumerator>"; | |
16007 | ||
16008 | dwarf2_const_value_attr (attr, type, name, &obstack, cu, | |
16009 | &value, &bytes, &baton); | |
16010 | if (value < 0) | |
16011 | { | |
16012 | unsigned_enum = 0; | |
16013 | flag_enum = 0; | |
16014 | } | |
55426c9d | 16015 | else |
edd45eb0 SM |
16016 | { |
16017 | if (count_one_bits_ll (value) >= 2) | |
16018 | flag_enum = 0; | |
edd45eb0 | 16019 | } |
55426c9d | 16020 | |
ed6acedd TT |
16021 | fields.emplace_back (); |
16022 | struct field &field = fields.back (); | |
16023 | FIELD_NAME (field) = dwarf2_physname (name, child_die, cu); | |
16024 | SET_FIELD_ENUMVAL (field, value); | |
16025 | } | |
16026 | ||
16027 | if (!fields.empty ()) | |
16028 | { | |
5e33d5f4 | 16029 | type->set_num_fields (fields.size ()); |
3cabb6b0 SM |
16030 | type->set_fields |
16031 | ((struct field *) | |
16032 | TYPE_ALLOC (type, sizeof (struct field) * fields.size ())); | |
80fc5e77 | 16033 | memcpy (type->fields (), fields.data (), |
ed6acedd | 16034 | sizeof (struct field) * fields.size ()); |
55426c9d JB |
16035 | } |
16036 | ||
16037 | if (unsigned_enum) | |
653223d3 SM |
16038 | type->set_is_unsigned (true); |
16039 | ||
55426c9d | 16040 | if (flag_enum) |
9902b327 | 16041 | type->set_is_flag_enum (true); |
55426c9d JB |
16042 | } |
16043 | ||
134d01f1 DJ |
16044 | /* Given a DW_AT_enumeration_type die, set its type. We do not |
16045 | complete the type's fields yet, or create any symbols. */ | |
c906108c | 16046 | |
f792889a | 16047 | static struct type * |
134d01f1 | 16048 | read_enumeration_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16049 | { |
5e22e966 | 16050 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 16051 | struct type *type; |
c906108c | 16052 | struct attribute *attr; |
0114d602 | 16053 | const char *name; |
134d01f1 | 16054 | |
348e048f DE |
16055 | /* If the definition of this type lives in .debug_types, read that type. |
16056 | Don't follow DW_AT_specification though, that will take us back up | |
16057 | the chain and we want to go down. */ | |
052c8bb8 | 16058 | attr = die->attr (DW_AT_signature); |
435d3d88 | 16059 | if (attr != nullptr) |
348e048f | 16060 | { |
ac9ec31b | 16061 | type = get_DW_AT_signature_type (die, attr, cu); |
9dc481d3 | 16062 | |
ac9ec31b | 16063 | /* The type's CU may not be the same as CU. |
02142a6c | 16064 | Ensure TYPE is recorded with CU in die_type_hash. */ |
348e048f DE |
16065 | return set_die_type (die, type, cu); |
16066 | } | |
16067 | ||
c906108c SS |
16068 | type = alloc_type (objfile); |
16069 | ||
67607e24 | 16070 | type->set_code (TYPE_CODE_ENUM); |
94af9270 | 16071 | name = dwarf2_full_name (NULL, die, cu); |
39cbfefa | 16072 | if (name != NULL) |
d0e39ea2 | 16073 | type->set_name (name); |
c906108c | 16074 | |
0626fc76 TT |
16075 | attr = dwarf2_attr (die, DW_AT_type, cu); |
16076 | if (attr != NULL) | |
16077 | { | |
16078 | struct type *underlying_type = die_type (die, cu); | |
16079 | ||
16080 | TYPE_TARGET_TYPE (type) = underlying_type; | |
16081 | } | |
16082 | ||
e142c38c | 16083 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 16084 | if (attr != nullptr) |
c906108c | 16085 | { |
529908cb | 16086 | TYPE_LENGTH (type) = attr->constant_value (0); |
c906108c SS |
16087 | } |
16088 | else | |
16089 | { | |
16090 | TYPE_LENGTH (type) = 0; | |
16091 | } | |
16092 | ||
2b4424c3 TT |
16093 | maybe_set_alignment (cu, die, type); |
16094 | ||
137033e9 JB |
16095 | /* The enumeration DIE can be incomplete. In Ada, any type can be |
16096 | declared as private in the package spec, and then defined only | |
16097 | inside the package body. Such types are known as Taft Amendment | |
16098 | Types. When another package uses such a type, an incomplete DIE | |
16099 | may be generated by the compiler. */ | |
02eb380e | 16100 | if (die_is_declaration (die, cu)) |
b4b73759 | 16101 | type->set_is_stub (true); |
02eb380e | 16102 | |
0626fc76 TT |
16103 | /* If this type has an underlying type that is not a stub, then we |
16104 | may use its attributes. We always use the "unsigned" attribute | |
16105 | in this situation, because ordinarily we guess whether the type | |
16106 | is unsigned -- but the guess can be wrong and the underlying type | |
16107 | can tell us the reality. However, we defer to a local size | |
16108 | attribute if one exists, because this lets the compiler override | |
16109 | the underlying type if needed. */ | |
e46d3488 | 16110 | if (TYPE_TARGET_TYPE (type) != NULL && !TYPE_TARGET_TYPE (type)->is_stub ()) |
0626fc76 | 16111 | { |
9e7c9a03 HD |
16112 | struct type *underlying_type = TYPE_TARGET_TYPE (type); |
16113 | underlying_type = check_typedef (underlying_type); | |
653223d3 SM |
16114 | |
16115 | type->set_is_unsigned (underlying_type->is_unsigned ()); | |
16116 | ||
0626fc76 | 16117 | if (TYPE_LENGTH (type) == 0) |
9e7c9a03 | 16118 | TYPE_LENGTH (type) = TYPE_LENGTH (underlying_type); |
653223d3 | 16119 | |
2b4424c3 | 16120 | if (TYPE_RAW_ALIGN (type) == 0 |
9e7c9a03 HD |
16121 | && TYPE_RAW_ALIGN (underlying_type) != 0) |
16122 | set_type_align (type, TYPE_RAW_ALIGN (underlying_type)); | |
0626fc76 TT |
16123 | } |
16124 | ||
aa70e35c | 16125 | type->set_is_declared_class (dwarf2_flag_true_p (die, DW_AT_enum_class, cu)); |
3d567982 | 16126 | |
ed6acedd TT |
16127 | set_die_type (die, type, cu); |
16128 | ||
16129 | /* Finish the creation of this type by using the enum's children. | |
16130 | Note that, as usual, this must come after set_die_type to avoid | |
16131 | infinite recursion when trying to compute the names of the | |
16132 | enumerators. */ | |
16133 | update_enumeration_type_from_children (die, type, cu); | |
16134 | ||
16135 | return type; | |
134d01f1 DJ |
16136 | } |
16137 | ||
16138 | /* Given a pointer to a die which begins an enumeration, process all | |
16139 | the dies that define the members of the enumeration, and create the | |
16140 | symbol for the enumeration type. | |
16141 | ||
16142 | NOTE: We reverse the order of the element list. */ | |
16143 | ||
16144 | static void | |
16145 | process_enumeration_scope (struct die_info *die, struct dwarf2_cu *cu) | |
16146 | { | |
f792889a | 16147 | struct type *this_type; |
134d01f1 | 16148 | |
f792889a DJ |
16149 | this_type = get_die_type (die, cu); |
16150 | if (this_type == NULL) | |
16151 | this_type = read_enumeration_type (die, cu); | |
9dc481d3 | 16152 | |
639d11d3 | 16153 | if (die->child != NULL) |
c906108c | 16154 | { |
9dc481d3 | 16155 | struct die_info *child_die; |
15d034d0 | 16156 | const char *name; |
9dc481d3 | 16157 | |
639d11d3 | 16158 | child_die = die->child; |
c906108c SS |
16159 | while (child_die && child_die->tag) |
16160 | { | |
16161 | if (child_die->tag != DW_TAG_enumerator) | |
16162 | { | |
e7c27a73 | 16163 | process_die (child_die, cu); |
c906108c SS |
16164 | } |
16165 | else | |
16166 | { | |
39cbfefa DJ |
16167 | name = dwarf2_name (child_die, cu); |
16168 | if (name) | |
ed6acedd | 16169 | new_symbol (child_die, this_type, cu); |
c906108c SS |
16170 | } |
16171 | ||
436c571c | 16172 | child_die = child_die->sibling; |
c906108c | 16173 | } |
c906108c | 16174 | } |
134d01f1 | 16175 | |
6c83ed52 TT |
16176 | /* If we are reading an enum from a .debug_types unit, and the enum |
16177 | is a declaration, and the enum is not the signatured type in the | |
16178 | unit, then we do not want to add a symbol for it. Adding a | |
16179 | symbol would in some cases obscure the true definition of the | |
16180 | enum, giving users an incomplete type when the definition is | |
16181 | actually available. Note that we do not want to do this for all | |
16182 | enums which are just declarations, because C++0x allows forward | |
16183 | enum declarations. */ | |
3019eac3 | 16184 | if (cu->per_cu->is_debug_types |
6c83ed52 TT |
16185 | && die_is_declaration (die, cu)) |
16186 | { | |
52dc124a | 16187 | struct signatured_type *sig_type; |
6c83ed52 | 16188 | |
c0f78cd4 | 16189 | sig_type = (struct signatured_type *) cu->per_cu; |
9c541725 PA |
16190 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
16191 | if (sig_type->type_offset_in_section != die->sect_off) | |
6c83ed52 TT |
16192 | return; |
16193 | } | |
16194 | ||
f792889a | 16195 | new_symbol (die, this_type, cu); |
c906108c SS |
16196 | } |
16197 | ||
57567375 TT |
16198 | /* Helper function for quirk_ada_thick_pointer that examines a bounds |
16199 | expression for an index type and finds the corresponding field | |
16200 | offset in the hidden "P_BOUNDS" structure. Returns true on success | |
16201 | and updates *FIELD, false if it fails to recognize an | |
16202 | expression. */ | |
16203 | ||
16204 | static bool | |
16205 | recognize_bound_expression (struct die_info *die, enum dwarf_attribute name, | |
16206 | int *bounds_offset, struct field *field, | |
16207 | struct dwarf2_cu *cu) | |
16208 | { | |
16209 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
16210 | if (attr == nullptr || !attr->form_is_block ()) | |
16211 | return false; | |
16212 | ||
16213 | const struct dwarf_block *block = attr->as_block (); | |
16214 | const gdb_byte *start = block->data; | |
16215 | const gdb_byte *end = block->data + block->size; | |
16216 | ||
16217 | /* The expression to recognize generally looks like: | |
16218 | ||
16219 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16220 | DW_OP_plus_uconst: 4; DW_OP_deref_size: 4) | |
16221 | ||
16222 | However, the second "plus_uconst" may be missing: | |
16223 | ||
16224 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16225 | DW_OP_deref_size: 4) | |
16226 | ||
16227 | This happens when the field is at the start of the structure. | |
16228 | ||
16229 | Also, the final deref may not be sized: | |
16230 | ||
16231 | (DW_OP_push_object_address; DW_OP_plus_uconst: 4; DW_OP_deref; | |
16232 | DW_OP_deref) | |
16233 | ||
16234 | This happens when the size of the index type happens to be the | |
16235 | same as the architecture's word size. This can occur with or | |
16236 | without the second plus_uconst. */ | |
16237 | ||
16238 | if (end - start < 2) | |
16239 | return false; | |
16240 | if (*start++ != DW_OP_push_object_address) | |
16241 | return false; | |
16242 | if (*start++ != DW_OP_plus_uconst) | |
16243 | return false; | |
16244 | ||
16245 | uint64_t this_bound_off; | |
16246 | start = gdb_read_uleb128 (start, end, &this_bound_off); | |
16247 | if (start == nullptr || (int) this_bound_off != this_bound_off) | |
16248 | return false; | |
16249 | /* Update *BOUNDS_OFFSET if needed, or alternatively verify that it | |
16250 | is consistent among all bounds. */ | |
16251 | if (*bounds_offset == -1) | |
16252 | *bounds_offset = this_bound_off; | |
16253 | else if (*bounds_offset != this_bound_off) | |
16254 | return false; | |
16255 | ||
16256 | if (start == end || *start++ != DW_OP_deref) | |
16257 | return false; | |
16258 | ||
16259 | int offset = 0; | |
16260 | if (start ==end) | |
16261 | return false; | |
16262 | else if (*start == DW_OP_deref_size || *start == DW_OP_deref) | |
16263 | { | |
16264 | /* This means an offset of 0. */ | |
16265 | } | |
16266 | else if (*start++ != DW_OP_plus_uconst) | |
16267 | return false; | |
16268 | else | |
16269 | { | |
16270 | /* The size is the parameter to DW_OP_plus_uconst. */ | |
16271 | uint64_t val; | |
16272 | start = gdb_read_uleb128 (start, end, &val); | |
16273 | if (start == nullptr) | |
16274 | return false; | |
16275 | if ((int) val != val) | |
16276 | return false; | |
16277 | offset = val; | |
16278 | } | |
16279 | ||
16280 | if (start == end) | |
16281 | return false; | |
16282 | ||
16283 | uint64_t size; | |
16284 | if (*start == DW_OP_deref_size) | |
16285 | { | |
16286 | start = gdb_read_uleb128 (start + 1, end, &size); | |
16287 | if (start == nullptr) | |
16288 | return false; | |
16289 | } | |
16290 | else if (*start == DW_OP_deref) | |
16291 | { | |
16292 | size = cu->header.addr_size; | |
16293 | ++start; | |
16294 | } | |
16295 | else | |
16296 | return false; | |
16297 | ||
16298 | SET_FIELD_BITPOS (*field, 8 * offset); | |
16299 | if (size != TYPE_LENGTH (field->type ())) | |
16300 | FIELD_BITSIZE (*field) = 8 * size; | |
16301 | ||
16302 | return true; | |
16303 | } | |
16304 | ||
16305 | /* With -fgnat-encodings=minimal, gcc will emit some unusual DWARF for | |
16306 | some kinds of Ada arrays: | |
16307 | ||
16308 | <1><11db>: Abbrev Number: 7 (DW_TAG_array_type) | |
16309 | <11dc> DW_AT_name : (indirect string, offset: 0x1bb8): string | |
16310 | <11e0> DW_AT_data_location: 2 byte block: 97 6 | |
16311 | (DW_OP_push_object_address; DW_OP_deref) | |
16312 | <11e3> DW_AT_type : <0x1173> | |
16313 | <11e7> DW_AT_sibling : <0x1201> | |
16314 | <2><11eb>: Abbrev Number: 8 (DW_TAG_subrange_type) | |
16315 | <11ec> DW_AT_type : <0x1206> | |
16316 | <11f0> DW_AT_lower_bound : 6 byte block: 97 23 8 6 94 4 | |
16317 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16318 | DW_OP_deref_size: 4) | |
16319 | <11f7> DW_AT_upper_bound : 8 byte block: 97 23 8 6 23 4 94 4 | |
16320 | (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref; | |
16321 | DW_OP_plus_uconst: 4; DW_OP_deref_size: 4) | |
16322 | ||
16323 | This actually represents a "thick pointer", which is a structure | |
16324 | with two elements: one that is a pointer to the array data, and one | |
16325 | that is a pointer to another structure; this second structure holds | |
16326 | the array bounds. | |
16327 | ||
16328 | This returns a new type on success, or nullptr if this didn't | |
16329 | recognize the type. */ | |
16330 | ||
16331 | static struct type * | |
16332 | quirk_ada_thick_pointer (struct die_info *die, struct dwarf2_cu *cu, | |
16333 | struct type *type) | |
16334 | { | |
16335 | struct attribute *attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
16336 | /* So far we've only seen this with block form. */ | |
16337 | if (attr == nullptr || !attr->form_is_block ()) | |
16338 | return nullptr; | |
16339 | ||
16340 | /* Note that this will fail if the structure layout is changed by | |
16341 | the compiler. However, we have no good way to recognize some | |
16342 | other layout, because we don't know what expression the compiler | |
16343 | might choose to emit should this happen. */ | |
16344 | struct dwarf_block *blk = attr->as_block (); | |
16345 | if (blk->size != 2 | |
16346 | || blk->data[0] != DW_OP_push_object_address | |
16347 | || blk->data[1] != DW_OP_deref) | |
16348 | return nullptr; | |
16349 | ||
16350 | int bounds_offset = -1; | |
16351 | int max_align = -1; | |
16352 | std::vector<struct field> range_fields; | |
16353 | for (struct die_info *child_die = die->child; | |
16354 | child_die; | |
16355 | child_die = child_die->sibling) | |
16356 | { | |
16357 | if (child_die->tag == DW_TAG_subrange_type) | |
16358 | { | |
16359 | struct type *underlying = read_subrange_index_type (child_die, cu); | |
16360 | ||
16361 | int this_align = type_align (underlying); | |
16362 | if (this_align > max_align) | |
16363 | max_align = this_align; | |
16364 | ||
16365 | range_fields.emplace_back (); | |
16366 | range_fields.emplace_back (); | |
16367 | ||
16368 | struct field &lower = range_fields[range_fields.size () - 2]; | |
16369 | struct field &upper = range_fields[range_fields.size () - 1]; | |
16370 | ||
16371 | lower.set_type (underlying); | |
16372 | FIELD_ARTIFICIAL (lower) = 1; | |
16373 | ||
16374 | upper.set_type (underlying); | |
16375 | FIELD_ARTIFICIAL (upper) = 1; | |
16376 | ||
16377 | if (!recognize_bound_expression (child_die, DW_AT_lower_bound, | |
16378 | &bounds_offset, &lower, cu) | |
16379 | || !recognize_bound_expression (child_die, DW_AT_upper_bound, | |
16380 | &bounds_offset, &upper, cu)) | |
16381 | return nullptr; | |
16382 | } | |
16383 | } | |
16384 | ||
16385 | /* This shouldn't really happen, but double-check that we found | |
16386 | where the bounds are stored. */ | |
16387 | if (bounds_offset == -1) | |
16388 | return nullptr; | |
16389 | ||
16390 | struct objfile *objfile = cu->per_objfile->objfile; | |
16391 | for (int i = 0; i < range_fields.size (); i += 2) | |
16392 | { | |
16393 | char name[20]; | |
16394 | ||
16395 | /* Set the name of each field in the bounds. */ | |
16396 | xsnprintf (name, sizeof (name), "LB%d", i / 2); | |
16397 | FIELD_NAME (range_fields[i]) = objfile->intern (name); | |
16398 | xsnprintf (name, sizeof (name), "UB%d", i / 2); | |
16399 | FIELD_NAME (range_fields[i + 1]) = objfile->intern (name); | |
16400 | } | |
16401 | ||
16402 | struct type *bounds = alloc_type (objfile); | |
16403 | bounds->set_code (TYPE_CODE_STRUCT); | |
16404 | ||
16405 | bounds->set_num_fields (range_fields.size ()); | |
16406 | bounds->set_fields | |
16407 | ((struct field *) TYPE_ALLOC (bounds, (bounds->num_fields () | |
16408 | * sizeof (struct field)))); | |
16409 | memcpy (bounds->fields (), range_fields.data (), | |
16410 | bounds->num_fields () * sizeof (struct field)); | |
16411 | ||
16412 | int last_fieldno = range_fields.size () - 1; | |
16413 | int bounds_size = (TYPE_FIELD_BITPOS (bounds, last_fieldno) / 8 | |
16414 | + TYPE_LENGTH (bounds->field (last_fieldno).type ())); | |
16415 | TYPE_LENGTH (bounds) = align_up (bounds_size, max_align); | |
16416 | ||
16417 | /* Rewrite the existing array type in place. Specifically, we | |
16418 | remove any dynamic properties we might have read, and we replace | |
16419 | the index types. */ | |
16420 | struct type *iter = type; | |
16421 | for (int i = 0; i < range_fields.size (); i += 2) | |
16422 | { | |
16423 | gdb_assert (iter->code () == TYPE_CODE_ARRAY); | |
16424 | iter->main_type->dyn_prop_list = nullptr; | |
16425 | iter->set_index_type | |
16426 | (create_static_range_type (NULL, bounds->field (i).type (), 1, 0)); | |
16427 | iter = TYPE_TARGET_TYPE (iter); | |
16428 | } | |
16429 | ||
16430 | struct type *result = alloc_type (objfile); | |
16431 | result->set_code (TYPE_CODE_STRUCT); | |
16432 | ||
16433 | result->set_num_fields (2); | |
16434 | result->set_fields | |
16435 | ((struct field *) TYPE_ZALLOC (result, (result->num_fields () | |
16436 | * sizeof (struct field)))); | |
16437 | ||
16438 | /* The names are chosen to coincide with what the compiler does with | |
16439 | -fgnat-encodings=all, which the Ada code in gdb already | |
16440 | understands. */ | |
16441 | TYPE_FIELD_NAME (result, 0) = "P_ARRAY"; | |
16442 | result->field (0).set_type (lookup_pointer_type (type)); | |
16443 | ||
16444 | TYPE_FIELD_NAME (result, 1) = "P_BOUNDS"; | |
16445 | result->field (1).set_type (lookup_pointer_type (bounds)); | |
16446 | SET_FIELD_BITPOS (result->field (1), 8 * bounds_offset); | |
16447 | ||
16448 | result->set_name (type->name ()); | |
16449 | TYPE_LENGTH (result) = (TYPE_LENGTH (result->field (0).type ()) | |
16450 | + TYPE_LENGTH (result->field (1).type ())); | |
16451 | ||
16452 | return result; | |
16453 | } | |
16454 | ||
c906108c SS |
16455 | /* Extract all information from a DW_TAG_array_type DIE and put it in |
16456 | the DIE's type field. For now, this only handles one dimensional | |
16457 | arrays. */ | |
16458 | ||
f792889a | 16459 | static struct type * |
e7c27a73 | 16460 | read_array_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16461 | { |
5e22e966 | 16462 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 16463 | struct die_info *child_die; |
7e314c57 | 16464 | struct type *type; |
c906108c | 16465 | struct type *element_type, *range_type, *index_type; |
c906108c | 16466 | struct attribute *attr; |
15d034d0 | 16467 | const char *name; |
a405673c | 16468 | struct dynamic_prop *byte_stride_prop = NULL; |
dc53a7ad | 16469 | unsigned int bit_stride = 0; |
c906108c | 16470 | |
e7c27a73 | 16471 | element_type = die_type (die, cu); |
c906108c | 16472 | |
7e314c57 JK |
16473 | /* The die_type call above may have already set the type for this DIE. */ |
16474 | type = get_die_type (die, cu); | |
16475 | if (type) | |
16476 | return type; | |
16477 | ||
dc53a7ad JB |
16478 | attr = dwarf2_attr (die, DW_AT_byte_stride, cu); |
16479 | if (attr != NULL) | |
a405673c JB |
16480 | { |
16481 | int stride_ok; | |
293e7e51 | 16482 | struct type *prop_type = cu->addr_sized_int_type (false); |
a405673c JB |
16483 | |
16484 | byte_stride_prop | |
16485 | = (struct dynamic_prop *) alloca (sizeof (struct dynamic_prop)); | |
9a49df9d AB |
16486 | stride_ok = attr_to_dynamic_prop (attr, die, cu, byte_stride_prop, |
16487 | prop_type); | |
a405673c JB |
16488 | if (!stride_ok) |
16489 | { | |
b98664d3 | 16490 | complaint (_("unable to read array DW_AT_byte_stride " |
9d8780f0 SM |
16491 | " - DIE at %s [in module %s]"), |
16492 | sect_offset_str (die->sect_off), | |
5e22e966 | 16493 | objfile_name (cu->per_objfile->objfile)); |
a405673c JB |
16494 | /* Ignore this attribute. We will likely not be able to print |
16495 | arrays of this type correctly, but there is little we can do | |
16496 | to help if we cannot read the attribute's value. */ | |
16497 | byte_stride_prop = NULL; | |
16498 | } | |
16499 | } | |
dc53a7ad JB |
16500 | |
16501 | attr = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
16502 | if (attr != NULL) | |
529908cb | 16503 | bit_stride = attr->constant_value (0); |
dc53a7ad | 16504 | |
c906108c SS |
16505 | /* Irix 6.2 native cc creates array types without children for |
16506 | arrays with unspecified length. */ | |
639d11d3 | 16507 | if (die->child == NULL) |
c906108c | 16508 | { |
46bf5051 | 16509 | index_type = objfile_type (objfile)->builtin_int; |
0c9c3474 | 16510 | range_type = create_static_range_type (NULL, index_type, 0, -1); |
dc53a7ad | 16511 | type = create_array_type_with_stride (NULL, element_type, range_type, |
a405673c | 16512 | byte_stride_prop, bit_stride); |
f792889a | 16513 | return set_die_type (die, type, cu); |
c906108c SS |
16514 | } |
16515 | ||
791afaa2 | 16516 | std::vector<struct type *> range_types; |
639d11d3 | 16517 | child_die = die->child; |
c906108c SS |
16518 | while (child_die && child_die->tag) |
16519 | { | |
16520 | if (child_die->tag == DW_TAG_subrange_type) | |
16521 | { | |
f792889a | 16522 | struct type *child_type = read_type_die (child_die, cu); |
9a619af0 | 16523 | |
dda83cd7 SM |
16524 | if (child_type != NULL) |
16525 | { | |
0963b4bd | 16526 | /* The range type was succesfully read. Save it for the |
dda83cd7 | 16527 | array type creation. */ |
791afaa2 | 16528 | range_types.push_back (child_type); |
dda83cd7 | 16529 | } |
c906108c | 16530 | } |
436c571c | 16531 | child_die = child_die->sibling; |
c906108c SS |
16532 | } |
16533 | ||
cf2b2075 TV |
16534 | if (range_types.empty ()) |
16535 | { | |
16536 | complaint (_("unable to find array range - DIE at %s [in module %s]"), | |
16537 | sect_offset_str (die->sect_off), | |
16538 | objfile_name (cu->per_objfile->objfile)); | |
16539 | return NULL; | |
16540 | } | |
16541 | ||
c906108c SS |
16542 | /* Dwarf2 dimensions are output from left to right, create the |
16543 | necessary array types in backwards order. */ | |
7ca2d3a3 | 16544 | |
c906108c | 16545 | type = element_type; |
7ca2d3a3 DL |
16546 | |
16547 | if (read_array_order (die, cu) == DW_ORD_col_major) | |
16548 | { | |
16549 | int i = 0; | |
9a619af0 | 16550 | |
791afaa2 | 16551 | while (i < range_types.size ()) |
10f6a3ad TT |
16552 | { |
16553 | type = create_array_type_with_stride (NULL, type, range_types[i++], | |
16554 | byte_stride_prop, bit_stride); | |
16555 | bit_stride = 0; | |
16556 | byte_stride_prop = nullptr; | |
16557 | } | |
7ca2d3a3 DL |
16558 | } |
16559 | else | |
16560 | { | |
791afaa2 | 16561 | size_t ndim = range_types.size (); |
7ca2d3a3 | 16562 | while (ndim-- > 0) |
10f6a3ad TT |
16563 | { |
16564 | type = create_array_type_with_stride (NULL, type, range_types[ndim], | |
16565 | byte_stride_prop, bit_stride); | |
16566 | bit_stride = 0; | |
16567 | byte_stride_prop = nullptr; | |
16568 | } | |
7ca2d3a3 | 16569 | } |
c906108c | 16570 | |
cf2b2075 TV |
16571 | gdb_assert (type != element_type); |
16572 | ||
f5f8a009 EZ |
16573 | /* Understand Dwarf2 support for vector types (like they occur on |
16574 | the PowerPC w/ AltiVec). Gcc just adds another attribute to the | |
16575 | array type. This is not part of the Dwarf2/3 standard yet, but a | |
16576 | custom vendor extension. The main difference between a regular | |
16577 | array and the vector variant is that vectors are passed by value | |
16578 | to functions. */ | |
e142c38c | 16579 | attr = dwarf2_attr (die, DW_AT_GNU_vector, cu); |
435d3d88 | 16580 | if (attr != nullptr) |
ea37ba09 | 16581 | make_vector_type (type); |
f5f8a009 | 16582 | |
dbc98a8b KW |
16583 | /* The DIE may have DW_AT_byte_size set. For example an OpenCL |
16584 | implementation may choose to implement triple vectors using this | |
16585 | attribute. */ | |
16586 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
529908cb | 16587 | if (attr != nullptr && attr->form_is_unsigned ()) |
dbc98a8b | 16588 | { |
529908cb TT |
16589 | if (attr->as_unsigned () >= TYPE_LENGTH (type)) |
16590 | TYPE_LENGTH (type) = attr->as_unsigned (); | |
dbc98a8b | 16591 | else |
b98664d3 | 16592 | complaint (_("DW_AT_byte_size for array type smaller " |
3e43a32a | 16593 | "than the total size of elements")); |
dbc98a8b KW |
16594 | } |
16595 | ||
39cbfefa DJ |
16596 | name = dwarf2_name (die, cu); |
16597 | if (name) | |
d0e39ea2 | 16598 | type->set_name (name); |
6e70227d | 16599 | |
2b4424c3 TT |
16600 | maybe_set_alignment (cu, die, type); |
16601 | ||
57567375 TT |
16602 | struct type *replacement_type = nullptr; |
16603 | if (cu->language == language_ada) | |
16604 | { | |
16605 | replacement_type = quirk_ada_thick_pointer (die, cu, type); | |
16606 | if (replacement_type != nullptr) | |
16607 | type = replacement_type; | |
16608 | } | |
16609 | ||
0963b4bd | 16610 | /* Install the type in the die. */ |
57567375 | 16611 | set_die_type (die, type, cu, replacement_type != nullptr); |
7e314c57 JK |
16612 | |
16613 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
16614 | set_descriptive_type (type, die, cu); |
16615 | ||
7e314c57 | 16616 | return type; |
c906108c SS |
16617 | } |
16618 | ||
7ca2d3a3 | 16619 | static enum dwarf_array_dim_ordering |
6e70227d | 16620 | read_array_order (struct die_info *die, struct dwarf2_cu *cu) |
7ca2d3a3 DL |
16621 | { |
16622 | struct attribute *attr; | |
16623 | ||
16624 | attr = dwarf2_attr (die, DW_AT_ordering, cu); | |
16625 | ||
435d3d88 | 16626 | if (attr != nullptr) |
1bc397c5 TT |
16627 | { |
16628 | LONGEST val = attr->constant_value (-1); | |
16629 | if (val == DW_ORD_row_major || val == DW_ORD_col_major) | |
16630 | return (enum dwarf_array_dim_ordering) val; | |
16631 | } | |
7ca2d3a3 | 16632 | |
0963b4bd MS |
16633 | /* GNU F77 is a special case, as at 08/2004 array type info is the |
16634 | opposite order to the dwarf2 specification, but data is still | |
16635 | laid out as per normal fortran. | |
7ca2d3a3 | 16636 | |
0963b4bd MS |
16637 | FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need |
16638 | version checking. */ | |
7ca2d3a3 | 16639 | |
905e0470 PM |
16640 | if (cu->language == language_fortran |
16641 | && cu->producer && strstr (cu->producer, "GNU F77")) | |
7ca2d3a3 DL |
16642 | { |
16643 | return DW_ORD_row_major; | |
16644 | } | |
16645 | ||
3a3440fb | 16646 | switch (cu->language_defn->array_ordering ()) |
7ca2d3a3 DL |
16647 | { |
16648 | case array_column_major: | |
16649 | return DW_ORD_col_major; | |
16650 | case array_row_major: | |
16651 | default: | |
16652 | return DW_ORD_row_major; | |
16653 | }; | |
16654 | } | |
16655 | ||
72019c9c | 16656 | /* Extract all information from a DW_TAG_set_type DIE and put it in |
0963b4bd | 16657 | the DIE's type field. */ |
72019c9c | 16658 | |
f792889a | 16659 | static struct type * |
72019c9c GM |
16660 | read_set_type (struct die_info *die, struct dwarf2_cu *cu) |
16661 | { | |
7e314c57 JK |
16662 | struct type *domain_type, *set_type; |
16663 | struct attribute *attr; | |
f792889a | 16664 | |
7e314c57 JK |
16665 | domain_type = die_type (die, cu); |
16666 | ||
16667 | /* The die_type call above may have already set the type for this DIE. */ | |
16668 | set_type = get_die_type (die, cu); | |
16669 | if (set_type) | |
16670 | return set_type; | |
16671 | ||
16672 | set_type = create_set_type (NULL, domain_type); | |
16673 | ||
16674 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); | |
529908cb TT |
16675 | if (attr != nullptr && attr->form_is_unsigned ()) |
16676 | TYPE_LENGTH (set_type) = attr->as_unsigned (); | |
7e314c57 | 16677 | |
2b4424c3 TT |
16678 | maybe_set_alignment (cu, die, set_type); |
16679 | ||
f792889a | 16680 | return set_die_type (die, set_type, cu); |
72019c9c | 16681 | } |
7ca2d3a3 | 16682 | |
0971de02 TT |
16683 | /* A helper for read_common_block that creates a locexpr baton. |
16684 | SYM is the symbol which we are marking as computed. | |
16685 | COMMON_DIE is the DIE for the common block. | |
16686 | COMMON_LOC is the location expression attribute for the common | |
16687 | block itself. | |
16688 | MEMBER_LOC is the location expression attribute for the particular | |
16689 | member of the common block that we are processing. | |
16690 | CU is the CU from which the above come. */ | |
16691 | ||
16692 | static void | |
16693 | mark_common_block_symbol_computed (struct symbol *sym, | |
16694 | struct die_info *common_die, | |
16695 | struct attribute *common_loc, | |
16696 | struct attribute *member_loc, | |
16697 | struct dwarf2_cu *cu) | |
16698 | { | |
5e22e966 | 16699 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba | 16700 | struct objfile *objfile = per_objfile->objfile; |
0971de02 TT |
16701 | struct dwarf2_locexpr_baton *baton; |
16702 | gdb_byte *ptr; | |
16703 | unsigned int cu_off; | |
08feed99 | 16704 | enum bfd_endian byte_order = gdbarch_byte_order (objfile->arch ()); |
0971de02 TT |
16705 | LONGEST offset = 0; |
16706 | ||
16707 | gdb_assert (common_loc && member_loc); | |
4fc6c0d5 TT |
16708 | gdb_assert (common_loc->form_is_block ()); |
16709 | gdb_assert (member_loc->form_is_block () | |
cd6c91b4 | 16710 | || member_loc->form_is_constant ()); |
0971de02 | 16711 | |
8d749320 | 16712 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
a50264ba | 16713 | baton->per_objfile = per_objfile; |
0971de02 TT |
16714 | baton->per_cu = cu->per_cu; |
16715 | gdb_assert (baton->per_cu); | |
16716 | ||
16717 | baton->size = 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */; | |
16718 | ||
cd6c91b4 | 16719 | if (member_loc->form_is_constant ()) |
0971de02 | 16720 | { |
0826b30a | 16721 | offset = member_loc->constant_value (0); |
0971de02 TT |
16722 | baton->size += 1 /* DW_OP_addr */ + cu->header.addr_size; |
16723 | } | |
16724 | else | |
9d2246fc | 16725 | baton->size += member_loc->as_block ()->size; |
0971de02 | 16726 | |
224c3ddb | 16727 | ptr = (gdb_byte *) obstack_alloc (&objfile->objfile_obstack, baton->size); |
0971de02 TT |
16728 | baton->data = ptr; |
16729 | ||
16730 | *ptr++ = DW_OP_call4; | |
9c541725 | 16731 | cu_off = common_die->sect_off - cu->per_cu->sect_off; |
0971de02 TT |
16732 | store_unsigned_integer (ptr, 4, byte_order, cu_off); |
16733 | ptr += 4; | |
16734 | ||
cd6c91b4 | 16735 | if (member_loc->form_is_constant ()) |
0971de02 TT |
16736 | { |
16737 | *ptr++ = DW_OP_addr; | |
16738 | store_unsigned_integer (ptr, cu->header.addr_size, byte_order, offset); | |
16739 | ptr += cu->header.addr_size; | |
16740 | } | |
16741 | else | |
16742 | { | |
16743 | /* We have to copy the data here, because DW_OP_call4 will only | |
16744 | use a DW_AT_location attribute. */ | |
9d2246fc TT |
16745 | struct dwarf_block *block = member_loc->as_block (); |
16746 | memcpy (ptr, block->data, block->size); | |
16747 | ptr += block->size; | |
0971de02 TT |
16748 | } |
16749 | ||
16750 | *ptr++ = DW_OP_plus; | |
16751 | gdb_assert (ptr - baton->data == baton->size); | |
16752 | ||
0971de02 | 16753 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 16754 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
0971de02 TT |
16755 | } |
16756 | ||
4357ac6c TT |
16757 | /* Create appropriate locally-scoped variables for all the |
16758 | DW_TAG_common_block entries. Also create a struct common_block | |
16759 | listing all such variables for `info common'. COMMON_BLOCK_DOMAIN | |
85102364 | 16760 | is used to separate the common blocks name namespace from regular |
4357ac6c | 16761 | variable names. */ |
c906108c SS |
16762 | |
16763 | static void | |
e7c27a73 | 16764 | read_common_block (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 16765 | { |
0971de02 TT |
16766 | struct attribute *attr; |
16767 | ||
16768 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
435d3d88 | 16769 | if (attr != nullptr) |
0971de02 TT |
16770 | { |
16771 | /* Support the .debug_loc offsets. */ | |
4fc6c0d5 | 16772 | if (attr->form_is_block ()) |
dda83cd7 | 16773 | { |
0971de02 | 16774 | /* Ok. */ |
dda83cd7 | 16775 | } |
cd6c91b4 | 16776 | else if (attr->form_is_section_offset ()) |
dda83cd7 | 16777 | { |
0971de02 TT |
16778 | dwarf2_complex_location_expr_complaint (); |
16779 | attr = NULL; | |
dda83cd7 | 16780 | } |
0971de02 | 16781 | else |
dda83cd7 | 16782 | { |
0971de02 TT |
16783 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
16784 | "common block member"); | |
16785 | attr = NULL; | |
dda83cd7 | 16786 | } |
0971de02 TT |
16787 | } |
16788 | ||
639d11d3 | 16789 | if (die->child != NULL) |
c906108c | 16790 | { |
5e22e966 | 16791 | struct objfile *objfile = cu->per_objfile->objfile; |
4357ac6c TT |
16792 | struct die_info *child_die; |
16793 | size_t n_entries = 0, size; | |
16794 | struct common_block *common_block; | |
16795 | struct symbol *sym; | |
74ac6d43 | 16796 | |
4357ac6c TT |
16797 | for (child_die = die->child; |
16798 | child_die && child_die->tag; | |
436c571c | 16799 | child_die = child_die->sibling) |
4357ac6c TT |
16800 | ++n_entries; |
16801 | ||
16802 | size = (sizeof (struct common_block) | |
16803 | + (n_entries - 1) * sizeof (struct symbol *)); | |
224c3ddb SM |
16804 | common_block |
16805 | = (struct common_block *) obstack_alloc (&objfile->objfile_obstack, | |
16806 | size); | |
4357ac6c TT |
16807 | memset (common_block->contents, 0, n_entries * sizeof (struct symbol *)); |
16808 | common_block->n_entries = 0; | |
16809 | ||
16810 | for (child_die = die->child; | |
16811 | child_die && child_die->tag; | |
436c571c | 16812 | child_die = child_die->sibling) |
4357ac6c TT |
16813 | { |
16814 | /* Create the symbol in the DW_TAG_common_block block in the current | |
16815 | symbol scope. */ | |
e7c27a73 | 16816 | sym = new_symbol (child_die, NULL, cu); |
0971de02 TT |
16817 | if (sym != NULL) |
16818 | { | |
16819 | struct attribute *member_loc; | |
16820 | ||
16821 | common_block->contents[common_block->n_entries++] = sym; | |
16822 | ||
16823 | member_loc = dwarf2_attr (child_die, DW_AT_data_member_location, | |
16824 | cu); | |
16825 | if (member_loc) | |
16826 | { | |
16827 | /* GDB has handled this for a long time, but it is | |
16828 | not specified by DWARF. It seems to have been | |
16829 | emitted by gfortran at least as recently as: | |
16830 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */ | |
b98664d3 | 16831 | complaint (_("Variable in common block has " |
0971de02 | 16832 | "DW_AT_data_member_location " |
9d8780f0 SM |
16833 | "- DIE at %s [in module %s]"), |
16834 | sect_offset_str (child_die->sect_off), | |
518817b3 | 16835 | objfile_name (objfile)); |
0971de02 | 16836 | |
cd6c91b4 | 16837 | if (member_loc->form_is_section_offset ()) |
0971de02 | 16838 | dwarf2_complex_location_expr_complaint (); |
cd6c91b4 | 16839 | else if (member_loc->form_is_constant () |
4fc6c0d5 | 16840 | || member_loc->form_is_block ()) |
0971de02 | 16841 | { |
435d3d88 | 16842 | if (attr != nullptr) |
0971de02 TT |
16843 | mark_common_block_symbol_computed (sym, die, attr, |
16844 | member_loc, cu); | |
16845 | } | |
16846 | else | |
16847 | dwarf2_complex_location_expr_complaint (); | |
16848 | } | |
16849 | } | |
c906108c | 16850 | } |
4357ac6c TT |
16851 | |
16852 | sym = new_symbol (die, objfile_type (objfile)->builtin_void, cu); | |
16853 | SYMBOL_VALUE_COMMON_BLOCK (sym) = common_block; | |
c906108c SS |
16854 | } |
16855 | } | |
16856 | ||
0114d602 | 16857 | /* Create a type for a C++ namespace. */ |
d9fa45fe | 16858 | |
0114d602 DJ |
16859 | static struct type * |
16860 | read_namespace_type (struct die_info *die, struct dwarf2_cu *cu) | |
d9fa45fe | 16861 | { |
5e22e966 | 16862 | struct objfile *objfile = cu->per_objfile->objfile; |
0114d602 | 16863 | const char *previous_prefix, *name; |
9219021c | 16864 | int is_anonymous; |
0114d602 DJ |
16865 | struct type *type; |
16866 | ||
16867 | /* For extensions, reuse the type of the original namespace. */ | |
16868 | if (dwarf2_attr (die, DW_AT_extension, cu) != NULL) | |
16869 | { | |
16870 | struct die_info *ext_die; | |
16871 | struct dwarf2_cu *ext_cu = cu; | |
9a619af0 | 16872 | |
0114d602 DJ |
16873 | ext_die = dwarf2_extension (die, &ext_cu); |
16874 | type = read_type_die (ext_die, ext_cu); | |
9dc481d3 DE |
16875 | |
16876 | /* EXT_CU may not be the same as CU. | |
02142a6c | 16877 | Ensure TYPE is recorded with CU in die_type_hash. */ |
0114d602 DJ |
16878 | return set_die_type (die, type, cu); |
16879 | } | |
9219021c | 16880 | |
e142c38c | 16881 | name = namespace_name (die, &is_anonymous, cu); |
9219021c DC |
16882 | |
16883 | /* Now build the name of the current namespace. */ | |
16884 | ||
0114d602 DJ |
16885 | previous_prefix = determine_prefix (die, cu); |
16886 | if (previous_prefix[0] != '\0') | |
16887 | name = typename_concat (&objfile->objfile_obstack, | |
f55ee35c | 16888 | previous_prefix, name, 0, cu); |
0114d602 DJ |
16889 | |
16890 | /* Create the type. */ | |
19f392bc | 16891 | type = init_type (objfile, TYPE_CODE_NAMESPACE, 0, name); |
0114d602 | 16892 | |
60531b24 | 16893 | return set_die_type (die, type, cu); |
0114d602 DJ |
16894 | } |
16895 | ||
22cee43f | 16896 | /* Read a namespace scope. */ |
0114d602 DJ |
16897 | |
16898 | static void | |
16899 | read_namespace (struct die_info *die, struct dwarf2_cu *cu) | |
16900 | { | |
5e22e966 | 16901 | struct objfile *objfile = cu->per_objfile->objfile; |
0114d602 | 16902 | int is_anonymous; |
9219021c | 16903 | |
5c4e30ca DC |
16904 | /* Add a symbol associated to this if we haven't seen the namespace |
16905 | before. Also, add a using directive if it's an anonymous | |
16906 | namespace. */ | |
9219021c | 16907 | |
f2f0e013 | 16908 | if (dwarf2_attr (die, DW_AT_extension, cu) == NULL) |
5c4e30ca DC |
16909 | { |
16910 | struct type *type; | |
16911 | ||
0114d602 | 16912 | type = read_type_die (die, cu); |
e7c27a73 | 16913 | new_symbol (die, type, cu); |
5c4e30ca | 16914 | |
e8e80198 | 16915 | namespace_name (die, &is_anonymous, cu); |
5c4e30ca | 16916 | if (is_anonymous) |
0114d602 DJ |
16917 | { |
16918 | const char *previous_prefix = determine_prefix (die, cu); | |
9a619af0 | 16919 | |
eb1e02fd | 16920 | std::vector<const char *> excludes; |
804d2729 | 16921 | add_using_directive (using_directives (cu), |
7d93a1e0 | 16922 | previous_prefix, type->name (), NULL, |
eb1e02fd | 16923 | NULL, excludes, 0, &objfile->objfile_obstack); |
0114d602 | 16924 | } |
5c4e30ca | 16925 | } |
9219021c | 16926 | |
639d11d3 | 16927 | if (die->child != NULL) |
d9fa45fe | 16928 | { |
639d11d3 | 16929 | struct die_info *child_die = die->child; |
6e70227d | 16930 | |
d9fa45fe DC |
16931 | while (child_die && child_die->tag) |
16932 | { | |
e7c27a73 | 16933 | process_die (child_die, cu); |
436c571c | 16934 | child_die = child_die->sibling; |
d9fa45fe DC |
16935 | } |
16936 | } | |
38d518c9 EZ |
16937 | } |
16938 | ||
f55ee35c JK |
16939 | /* Read a Fortran module as type. This DIE can be only a declaration used for |
16940 | imported module. Still we need that type as local Fortran "use ... only" | |
16941 | declaration imports depend on the created type in determine_prefix. */ | |
16942 | ||
16943 | static struct type * | |
16944 | read_module_type (struct die_info *die, struct dwarf2_cu *cu) | |
16945 | { | |
5e22e966 | 16946 | struct objfile *objfile = cu->per_objfile->objfile; |
15d034d0 | 16947 | const char *module_name; |
f55ee35c JK |
16948 | struct type *type; |
16949 | ||
16950 | module_name = dwarf2_name (die, cu); | |
19f392bc | 16951 | type = init_type (objfile, TYPE_CODE_MODULE, 0, module_name); |
f55ee35c | 16952 | |
f55ee35c JK |
16953 | return set_die_type (die, type, cu); |
16954 | } | |
16955 | ||
5d7cb8df JK |
16956 | /* Read a Fortran module. */ |
16957 | ||
16958 | static void | |
16959 | read_module (struct die_info *die, struct dwarf2_cu *cu) | |
16960 | { | |
16961 | struct die_info *child_die = die->child; | |
530e8392 KB |
16962 | struct type *type; |
16963 | ||
16964 | type = read_type_die (die, cu); | |
16965 | new_symbol (die, type, cu); | |
5d7cb8df | 16966 | |
5d7cb8df JK |
16967 | while (child_die && child_die->tag) |
16968 | { | |
16969 | process_die (child_die, cu); | |
436c571c | 16970 | child_die = child_die->sibling; |
5d7cb8df JK |
16971 | } |
16972 | } | |
16973 | ||
38d518c9 EZ |
16974 | /* Return the name of the namespace represented by DIE. Set |
16975 | *IS_ANONYMOUS to tell whether or not the namespace is an anonymous | |
16976 | namespace. */ | |
16977 | ||
16978 | static const char * | |
e142c38c | 16979 | namespace_name (struct die_info *die, int *is_anonymous, struct dwarf2_cu *cu) |
38d518c9 EZ |
16980 | { |
16981 | struct die_info *current_die; | |
16982 | const char *name = NULL; | |
16983 | ||
16984 | /* Loop through the extensions until we find a name. */ | |
16985 | ||
16986 | for (current_die = die; | |
16987 | current_die != NULL; | |
f2f0e013 | 16988 | current_die = dwarf2_extension (die, &cu)) |
38d518c9 | 16989 | { |
96553a0c DE |
16990 | /* We don't use dwarf2_name here so that we can detect the absence |
16991 | of a name -> anonymous namespace. */ | |
7d45c7c3 | 16992 | name = dwarf2_string_attr (die, DW_AT_name, cu); |
96553a0c | 16993 | |
38d518c9 EZ |
16994 | if (name != NULL) |
16995 | break; | |
16996 | } | |
16997 | ||
16998 | /* Is it an anonymous namespace? */ | |
16999 | ||
17000 | *is_anonymous = (name == NULL); | |
17001 | if (*is_anonymous) | |
2b1dbab0 | 17002 | name = CP_ANONYMOUS_NAMESPACE_STR; |
38d518c9 EZ |
17003 | |
17004 | return name; | |
d9fa45fe DC |
17005 | } |
17006 | ||
c906108c SS |
17007 | /* Extract all information from a DW_TAG_pointer_type DIE and add to |
17008 | the user defined type vector. */ | |
17009 | ||
f792889a | 17010 | static struct type * |
e7c27a73 | 17011 | read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17012 | { |
5e22e966 | 17013 | struct gdbarch *gdbarch = cu->per_objfile->objfile->arch (); |
e7c27a73 | 17014 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 17015 | struct type *type; |
8b2dbe47 KB |
17016 | struct attribute *attr_byte_size; |
17017 | struct attribute *attr_address_class; | |
17018 | int byte_size, addr_class; | |
7e314c57 JK |
17019 | struct type *target_type; |
17020 | ||
17021 | target_type = die_type (die, cu); | |
c906108c | 17022 | |
7e314c57 JK |
17023 | /* The die_type call above may have already set the type for this DIE. */ |
17024 | type = get_die_type (die, cu); | |
17025 | if (type) | |
17026 | return type; | |
17027 | ||
17028 | type = lookup_pointer_type (target_type); | |
8b2dbe47 | 17029 | |
e142c38c | 17030 | attr_byte_size = dwarf2_attr (die, DW_AT_byte_size, cu); |
8b2dbe47 | 17031 | if (attr_byte_size) |
529908cb | 17032 | byte_size = attr_byte_size->constant_value (cu_header->addr_size); |
c906108c | 17033 | else |
8b2dbe47 KB |
17034 | byte_size = cu_header->addr_size; |
17035 | ||
e142c38c | 17036 | attr_address_class = dwarf2_attr (die, DW_AT_address_class, cu); |
8b2dbe47 | 17037 | if (attr_address_class) |
529908cb | 17038 | addr_class = attr_address_class->constant_value (DW_ADDR_none); |
8b2dbe47 KB |
17039 | else |
17040 | addr_class = DW_ADDR_none; | |
17041 | ||
2b4424c3 TT |
17042 | ULONGEST alignment = get_alignment (cu, die); |
17043 | ||
17044 | /* If the pointer size, alignment, or address class is different | |
17045 | than the default, create a type variant marked as such and set | |
17046 | the length accordingly. */ | |
17047 | if (TYPE_LENGTH (type) != byte_size | |
17048 | || (alignment != 0 && TYPE_RAW_ALIGN (type) != 0 | |
17049 | && alignment != TYPE_RAW_ALIGN (type)) | |
17050 | || addr_class != DW_ADDR_none) | |
c906108c | 17051 | { |
5e2b427d | 17052 | if (gdbarch_address_class_type_flags_p (gdbarch)) |
8b2dbe47 | 17053 | { |
314ad88d PA |
17054 | type_instance_flags type_flags |
17055 | = gdbarch_address_class_type_flags (gdbarch, byte_size, | |
17056 | addr_class); | |
876cecd0 TT |
17057 | gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL) |
17058 | == 0); | |
8b2dbe47 KB |
17059 | type = make_type_with_address_space (type, type_flags); |
17060 | } | |
17061 | else if (TYPE_LENGTH (type) != byte_size) | |
17062 | { | |
b98664d3 | 17063 | complaint (_("invalid pointer size %d"), byte_size); |
8b2dbe47 | 17064 | } |
2b4424c3 TT |
17065 | else if (TYPE_RAW_ALIGN (type) != alignment) |
17066 | { | |
b98664d3 | 17067 | complaint (_("Invalid DW_AT_alignment" |
2b4424c3 TT |
17068 | " - DIE at %s [in module %s]"), |
17069 | sect_offset_str (die->sect_off), | |
5e22e966 | 17070 | objfile_name (cu->per_objfile->objfile)); |
2b4424c3 | 17071 | } |
6e70227d | 17072 | else |
9a619af0 MS |
17073 | { |
17074 | /* Should we also complain about unhandled address classes? */ | |
17075 | } | |
c906108c | 17076 | } |
8b2dbe47 KB |
17077 | |
17078 | TYPE_LENGTH (type) = byte_size; | |
2b4424c3 | 17079 | set_type_align (type, alignment); |
f792889a | 17080 | return set_die_type (die, type, cu); |
c906108c SS |
17081 | } |
17082 | ||
17083 | /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to | |
17084 | the user defined type vector. */ | |
17085 | ||
f792889a | 17086 | static struct type * |
e7c27a73 | 17087 | read_tag_ptr_to_member_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c SS |
17088 | { |
17089 | struct type *type; | |
17090 | struct type *to_type; | |
17091 | struct type *domain; | |
17092 | ||
e7c27a73 DJ |
17093 | to_type = die_type (die, cu); |
17094 | domain = die_containing_type (die, cu); | |
0d5de010 | 17095 | |
7e314c57 JK |
17096 | /* The calls above may have already set the type for this DIE. */ |
17097 | type = get_die_type (die, cu); | |
17098 | if (type) | |
17099 | return type; | |
17100 | ||
78134374 | 17101 | if (check_typedef (to_type)->code () == TYPE_CODE_METHOD) |
0d5de010 | 17102 | type = lookup_methodptr_type (to_type); |
78134374 | 17103 | else if (check_typedef (to_type)->code () == TYPE_CODE_FUNC) |
7078baeb | 17104 | { |
5e22e966 | 17105 | struct type *new_type = alloc_type (cu->per_objfile->objfile); |
7078baeb TT |
17106 | |
17107 | smash_to_method_type (new_type, domain, TYPE_TARGET_TYPE (to_type), | |
80fc5e77 | 17108 | to_type->fields (), to_type->num_fields (), |
a409645d | 17109 | to_type->has_varargs ()); |
7078baeb TT |
17110 | type = lookup_methodptr_type (new_type); |
17111 | } | |
0d5de010 DJ |
17112 | else |
17113 | type = lookup_memberptr_type (to_type, domain); | |
c906108c | 17114 | |
f792889a | 17115 | return set_die_type (die, type, cu); |
c906108c SS |
17116 | } |
17117 | ||
4297a3f0 | 17118 | /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to |
c906108c SS |
17119 | the user defined type vector. */ |
17120 | ||
f792889a | 17121 | static struct type * |
4297a3f0 | 17122 | read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu, |
dda83cd7 | 17123 | enum type_code refcode) |
c906108c | 17124 | { |
e7c27a73 | 17125 | struct comp_unit_head *cu_header = &cu->header; |
7e314c57 | 17126 | struct type *type, *target_type; |
c906108c SS |
17127 | struct attribute *attr; |
17128 | ||
4297a3f0 AV |
17129 | gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF); |
17130 | ||
7e314c57 JK |
17131 | target_type = die_type (die, cu); |
17132 | ||
17133 | /* The die_type call above may have already set the type for this DIE. */ | |
17134 | type = get_die_type (die, cu); | |
17135 | if (type) | |
17136 | return type; | |
17137 | ||
4297a3f0 | 17138 | type = lookup_reference_type (target_type, refcode); |
e142c38c | 17139 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 17140 | if (attr != nullptr) |
c906108c | 17141 | { |
529908cb | 17142 | TYPE_LENGTH (type) = attr->constant_value (cu_header->addr_size); |
c906108c SS |
17143 | } |
17144 | else | |
17145 | { | |
107d2387 | 17146 | TYPE_LENGTH (type) = cu_header->addr_size; |
c906108c | 17147 | } |
2b4424c3 | 17148 | maybe_set_alignment (cu, die, type); |
f792889a | 17149 | return set_die_type (die, type, cu); |
c906108c SS |
17150 | } |
17151 | ||
cf363f18 MW |
17152 | /* Add the given cv-qualifiers to the element type of the array. GCC |
17153 | outputs DWARF type qualifiers that apply to an array, not the | |
17154 | element type. But GDB relies on the array element type to carry | |
17155 | the cv-qualifiers. This mimics section 6.7.3 of the C99 | |
17156 | specification. */ | |
17157 | ||
17158 | static struct type * | |
17159 | add_array_cv_type (struct die_info *die, struct dwarf2_cu *cu, | |
17160 | struct type *base_type, int cnst, int voltl) | |
17161 | { | |
17162 | struct type *el_type, *inner_array; | |
17163 | ||
17164 | base_type = copy_type (base_type); | |
17165 | inner_array = base_type; | |
17166 | ||
78134374 | 17167 | while (TYPE_TARGET_TYPE (inner_array)->code () == TYPE_CODE_ARRAY) |
cf363f18 MW |
17168 | { |
17169 | TYPE_TARGET_TYPE (inner_array) = | |
17170 | copy_type (TYPE_TARGET_TYPE (inner_array)); | |
17171 | inner_array = TYPE_TARGET_TYPE (inner_array); | |
17172 | } | |
17173 | ||
17174 | el_type = TYPE_TARGET_TYPE (inner_array); | |
17175 | cnst |= TYPE_CONST (el_type); | |
17176 | voltl |= TYPE_VOLATILE (el_type); | |
17177 | TYPE_TARGET_TYPE (inner_array) = make_cv_type (cnst, voltl, el_type, NULL); | |
17178 | ||
17179 | return set_die_type (die, base_type, cu); | |
17180 | } | |
17181 | ||
f792889a | 17182 | static struct type * |
e7c27a73 | 17183 | read_tag_const_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17184 | { |
f792889a | 17185 | struct type *base_type, *cv_type; |
c906108c | 17186 | |
e7c27a73 | 17187 | base_type = die_type (die, cu); |
7e314c57 JK |
17188 | |
17189 | /* The die_type call above may have already set the type for this DIE. */ | |
17190 | cv_type = get_die_type (die, cu); | |
17191 | if (cv_type) | |
17192 | return cv_type; | |
17193 | ||
2f608a3a KW |
17194 | /* In case the const qualifier is applied to an array type, the element type |
17195 | is so qualified, not the array type (section 6.7.3 of C99). */ | |
78134374 | 17196 | if (base_type->code () == TYPE_CODE_ARRAY) |
cf363f18 | 17197 | return add_array_cv_type (die, cu, base_type, 1, 0); |
2f608a3a | 17198 | |
f792889a DJ |
17199 | cv_type = make_cv_type (1, TYPE_VOLATILE (base_type), base_type, 0); |
17200 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17201 | } |
17202 | ||
f792889a | 17203 | static struct type * |
e7c27a73 | 17204 | read_tag_volatile_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17205 | { |
f792889a | 17206 | struct type *base_type, *cv_type; |
c906108c | 17207 | |
e7c27a73 | 17208 | base_type = die_type (die, cu); |
7e314c57 JK |
17209 | |
17210 | /* The die_type call above may have already set the type for this DIE. */ | |
17211 | cv_type = get_die_type (die, cu); | |
17212 | if (cv_type) | |
17213 | return cv_type; | |
17214 | ||
cf363f18 MW |
17215 | /* In case the volatile qualifier is applied to an array type, the |
17216 | element type is so qualified, not the array type (section 6.7.3 | |
17217 | of C99). */ | |
78134374 | 17218 | if (base_type->code () == TYPE_CODE_ARRAY) |
cf363f18 MW |
17219 | return add_array_cv_type (die, cu, base_type, 0, 1); |
17220 | ||
f792889a DJ |
17221 | cv_type = make_cv_type (TYPE_CONST (base_type), 1, base_type, 0); |
17222 | return set_die_type (die, cv_type, cu); | |
c906108c SS |
17223 | } |
17224 | ||
06d66ee9 TT |
17225 | /* Handle DW_TAG_restrict_type. */ |
17226 | ||
17227 | static struct type * | |
17228 | read_tag_restrict_type (struct die_info *die, struct dwarf2_cu *cu) | |
17229 | { | |
17230 | struct type *base_type, *cv_type; | |
17231 | ||
17232 | base_type = die_type (die, cu); | |
17233 | ||
17234 | /* The die_type call above may have already set the type for this DIE. */ | |
17235 | cv_type = get_die_type (die, cu); | |
17236 | if (cv_type) | |
17237 | return cv_type; | |
17238 | ||
17239 | cv_type = make_restrict_type (base_type); | |
17240 | return set_die_type (die, cv_type, cu); | |
17241 | } | |
17242 | ||
a2c2acaf MW |
17243 | /* Handle DW_TAG_atomic_type. */ |
17244 | ||
17245 | static struct type * | |
17246 | read_tag_atomic_type (struct die_info *die, struct dwarf2_cu *cu) | |
17247 | { | |
17248 | struct type *base_type, *cv_type; | |
17249 | ||
17250 | base_type = die_type (die, cu); | |
17251 | ||
17252 | /* The die_type call above may have already set the type for this DIE. */ | |
17253 | cv_type = get_die_type (die, cu); | |
17254 | if (cv_type) | |
17255 | return cv_type; | |
17256 | ||
17257 | cv_type = make_atomic_type (base_type); | |
17258 | return set_die_type (die, cv_type, cu); | |
17259 | } | |
17260 | ||
c906108c SS |
17261 | /* Extract all information from a DW_TAG_string_type DIE and add to |
17262 | the user defined type vector. It isn't really a user defined type, | |
17263 | but it behaves like one, with other DIE's using an AT_user_def_type | |
17264 | attribute to reference it. */ | |
17265 | ||
f792889a | 17266 | static struct type * |
e7c27a73 | 17267 | read_tag_string_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17268 | { |
5e22e966 | 17269 | struct objfile *objfile = cu->per_objfile->objfile; |
08feed99 | 17270 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c SS |
17271 | struct type *type, *range_type, *index_type, *char_type; |
17272 | struct attribute *attr; | |
216a7e6b AB |
17273 | struct dynamic_prop prop; |
17274 | bool length_is_constant = true; | |
17275 | LONGEST length; | |
17276 | ||
17277 | /* There are a couple of places where bit sizes might be made use of | |
17278 | when parsing a DW_TAG_string_type, however, no producer that we know | |
17279 | of make use of these. Handling bit sizes that are a multiple of the | |
17280 | byte size is easy enough, but what about other bit sizes? Lets deal | |
17281 | with that problem when we have to. Warn about these attributes being | |
17282 | unsupported, then parse the type and ignore them like we always | |
17283 | have. */ | |
17284 | if (dwarf2_attr (die, DW_AT_bit_size, cu) != nullptr | |
17285 | || dwarf2_attr (die, DW_AT_string_length_bit_size, cu) != nullptr) | |
17286 | { | |
17287 | static bool warning_printed = false; | |
17288 | if (!warning_printed) | |
17289 | { | |
17290 | warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not " | |
17291 | "currently supported on DW_TAG_string_type.")); | |
17292 | warning_printed = true; | |
17293 | } | |
17294 | } | |
c906108c | 17295 | |
e142c38c | 17296 | attr = dwarf2_attr (die, DW_AT_string_length, cu); |
cd6c91b4 | 17297 | if (attr != nullptr && !attr->form_is_constant ()) |
216a7e6b AB |
17298 | { |
17299 | /* The string length describes the location at which the length of | |
17300 | the string can be found. The size of the length field can be | |
17301 | specified with one of the attributes below. */ | |
17302 | struct type *prop_type; | |
17303 | struct attribute *len | |
17304 | = dwarf2_attr (die, DW_AT_string_length_byte_size, cu); | |
17305 | if (len == nullptr) | |
17306 | len = dwarf2_attr (die, DW_AT_byte_size, cu); | |
cd6c91b4 | 17307 | if (len != nullptr && len->form_is_constant ()) |
216a7e6b AB |
17308 | { |
17309 | /* Pass 0 as the default as we know this attribute is constant | |
17310 | and the default value will not be returned. */ | |
0826b30a | 17311 | LONGEST sz = len->constant_value (0); |
293e7e51 | 17312 | prop_type = cu->per_objfile->int_type (sz, true); |
216a7e6b AB |
17313 | } |
17314 | else | |
17315 | { | |
17316 | /* If the size is not specified then we assume it is the size of | |
17317 | an address on this target. */ | |
293e7e51 | 17318 | prop_type = cu->addr_sized_int_type (true); |
216a7e6b AB |
17319 | } |
17320 | ||
17321 | /* Convert the attribute into a dynamic property. */ | |
17322 | if (!attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) | |
17323 | length = 1; | |
17324 | else | |
17325 | length_is_constant = false; | |
17326 | } | |
17327 | else if (attr != nullptr) | |
17328 | { | |
17329 | /* This DW_AT_string_length just contains the length with no | |
17330 | indirection. There's no need to create a dynamic property in this | |
17331 | case. Pass 0 for the default value as we know it will not be | |
17332 | returned in this case. */ | |
0826b30a | 17333 | length = attr->constant_value (0); |
216a7e6b AB |
17334 | } |
17335 | else if ((attr = dwarf2_attr (die, DW_AT_byte_size, cu)) != nullptr) | |
c906108c | 17336 | { |
216a7e6b | 17337 | /* We don't currently support non-constant byte sizes for strings. */ |
0826b30a | 17338 | length = attr->constant_value (1); |
c906108c SS |
17339 | } |
17340 | else | |
17341 | { | |
216a7e6b AB |
17342 | /* Use 1 as a fallback length if we have nothing else. */ |
17343 | length = 1; | |
c906108c | 17344 | } |
6ccb9162 | 17345 | |
46bf5051 | 17346 | index_type = objfile_type (objfile)->builtin_int; |
216a7e6b AB |
17347 | if (length_is_constant) |
17348 | range_type = create_static_range_type (NULL, index_type, 1, length); | |
17349 | else | |
17350 | { | |
17351 | struct dynamic_prop low_bound; | |
17352 | ||
8c2e4e06 | 17353 | low_bound.set_const_val (1); |
216a7e6b AB |
17354 | range_type = create_range_type (NULL, index_type, &low_bound, &prop, 0); |
17355 | } | |
3b7538c0 UW |
17356 | char_type = language_string_char_type (cu->language_defn, gdbarch); |
17357 | type = create_string_type (NULL, char_type, range_type); | |
6ccb9162 | 17358 | |
f792889a | 17359 | return set_die_type (die, type, cu); |
c906108c SS |
17360 | } |
17361 | ||
4d804846 JB |
17362 | /* Assuming that DIE corresponds to a function, returns nonzero |
17363 | if the function is prototyped. */ | |
17364 | ||
17365 | static int | |
17366 | prototyped_function_p (struct die_info *die, struct dwarf2_cu *cu) | |
17367 | { | |
17368 | struct attribute *attr; | |
17369 | ||
17370 | attr = dwarf2_attr (die, DW_AT_prototyped, cu); | |
c45bc3f8 | 17371 | if (attr && attr->as_boolean ()) |
4d804846 JB |
17372 | return 1; |
17373 | ||
17374 | /* The DWARF standard implies that the DW_AT_prototyped attribute | |
85102364 | 17375 | is only meaningful for C, but the concept also extends to other |
4d804846 JB |
17376 | languages that allow unprototyped functions (Eg: Objective C). |
17377 | For all other languages, assume that functions are always | |
17378 | prototyped. */ | |
17379 | if (cu->language != language_c | |
17380 | && cu->language != language_objc | |
17381 | && cu->language != language_opencl) | |
17382 | return 1; | |
17383 | ||
17384 | /* RealView does not emit DW_AT_prototyped. We can not distinguish | |
17385 | prototyped and unprototyped functions; default to prototyped, | |
17386 | since that is more common in modern code (and RealView warns | |
17387 | about unprototyped functions). */ | |
17388 | if (producer_is_realview (cu->producer)) | |
17389 | return 1; | |
17390 | ||
17391 | return 0; | |
17392 | } | |
17393 | ||
c906108c SS |
17394 | /* Handle DIES due to C code like: |
17395 | ||
17396 | struct foo | |
c5aa993b JM |
17397 | { |
17398 | int (*funcp)(int a, long l); | |
17399 | int b; | |
17400 | }; | |
c906108c | 17401 | |
0963b4bd | 17402 | ('funcp' generates a DW_TAG_subroutine_type DIE). */ |
c906108c | 17403 | |
f792889a | 17404 | static struct type * |
e7c27a73 | 17405 | read_subroutine_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17406 | { |
5e22e966 | 17407 | struct objfile *objfile = cu->per_objfile->objfile; |
0963b4bd MS |
17408 | struct type *type; /* Type that this function returns. */ |
17409 | struct type *ftype; /* Function that returns above type. */ | |
c906108c SS |
17410 | struct attribute *attr; |
17411 | ||
e7c27a73 | 17412 | type = die_type (die, cu); |
7e314c57 JK |
17413 | |
17414 | /* The die_type call above may have already set the type for this DIE. */ | |
17415 | ftype = get_die_type (die, cu); | |
17416 | if (ftype) | |
17417 | return ftype; | |
17418 | ||
0c8b41f1 | 17419 | ftype = lookup_function_type (type); |
c906108c | 17420 | |
4d804846 | 17421 | if (prototyped_function_p (die, cu)) |
27e69b7a | 17422 | ftype->set_is_prototyped (true); |
c906108c | 17423 | |
c055b101 CV |
17424 | /* Store the calling convention in the type if it's available in |
17425 | the subroutine die. Otherwise set the calling convention to | |
17426 | the default value DW_CC_normal. */ | |
17427 | attr = dwarf2_attr (die, DW_AT_calling_convention, cu); | |
d0922fcf | 17428 | if (attr != nullptr |
529908cb | 17429 | && is_valid_DW_AT_calling_convention_for_subroutine (attr->constant_value (0))) |
d0922fcf | 17430 | TYPE_CALLING_CONVENTION (ftype) |
529908cb | 17431 | = (enum dwarf_calling_convention) attr->constant_value (0); |
54fcddd0 UW |
17432 | else if (cu->producer && strstr (cu->producer, "IBM XL C for OpenCL")) |
17433 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_GDB_IBM_OpenCL; | |
17434 | else | |
17435 | TYPE_CALLING_CONVENTION (ftype) = DW_CC_normal; | |
76c10ea2 | 17436 | |
743649fd MW |
17437 | /* Record whether the function returns normally to its caller or not |
17438 | if the DWARF producer set that information. */ | |
17439 | attr = dwarf2_attr (die, DW_AT_noreturn, cu); | |
c45bc3f8 | 17440 | if (attr && attr->as_boolean ()) |
743649fd MW |
17441 | TYPE_NO_RETURN (ftype) = 1; |
17442 | ||
76c10ea2 GM |
17443 | /* We need to add the subroutine type to the die immediately so |
17444 | we don't infinitely recurse when dealing with parameters | |
0963b4bd | 17445 | declared as the same subroutine type. */ |
76c10ea2 | 17446 | set_die_type (die, ftype, cu); |
6e70227d | 17447 | |
639d11d3 | 17448 | if (die->child != NULL) |
c906108c | 17449 | { |
bb5ed363 | 17450 | struct type *void_type = objfile_type (objfile)->builtin_void; |
c906108c | 17451 | struct die_info *child_die; |
8072405b | 17452 | int nparams, iparams; |
c906108c SS |
17453 | |
17454 | /* Count the number of parameters. | |
dda83cd7 SM |
17455 | FIXME: GDB currently ignores vararg functions, but knows about |
17456 | vararg member functions. */ | |
8072405b | 17457 | nparams = 0; |
639d11d3 | 17458 | child_die = die->child; |
c906108c SS |
17459 | while (child_die && child_die->tag) |
17460 | { | |
17461 | if (child_die->tag == DW_TAG_formal_parameter) | |
17462 | nparams++; | |
17463 | else if (child_die->tag == DW_TAG_unspecified_parameters) | |
1d6286ed SM |
17464 | ftype->set_has_varargs (true); |
17465 | ||
436c571c | 17466 | child_die = child_die->sibling; |
c906108c SS |
17467 | } |
17468 | ||
17469 | /* Allocate storage for parameters and fill them in. */ | |
5e33d5f4 | 17470 | ftype->set_num_fields (nparams); |
3cabb6b0 SM |
17471 | ftype->set_fields |
17472 | ((struct field *) TYPE_ZALLOC (ftype, nparams * sizeof (struct field))); | |
c906108c | 17473 | |
8072405b JK |
17474 | /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it |
17475 | even if we error out during the parameters reading below. */ | |
17476 | for (iparams = 0; iparams < nparams; iparams++) | |
5d14b6e5 | 17477 | ftype->field (iparams).set_type (void_type); |
8072405b JK |
17478 | |
17479 | iparams = 0; | |
639d11d3 | 17480 | child_die = die->child; |
c906108c SS |
17481 | while (child_die && child_die->tag) |
17482 | { | |
17483 | if (child_die->tag == DW_TAG_formal_parameter) | |
17484 | { | |
3ce3b1ba PA |
17485 | struct type *arg_type; |
17486 | ||
17487 | /* DWARF version 2 has no clean way to discern C++ | |
17488 | static and non-static member functions. G++ helps | |
17489 | GDB by marking the first parameter for non-static | |
17490 | member functions (which is the this pointer) as | |
17491 | artificial. We pass this information to | |
17492 | dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL. | |
17493 | ||
17494 | DWARF version 3 added DW_AT_object_pointer, which GCC | |
17495 | 4.5 does not yet generate. */ | |
e142c38c | 17496 | attr = dwarf2_attr (child_die, DW_AT_artificial, cu); |
435d3d88 | 17497 | if (attr != nullptr) |
c45bc3f8 | 17498 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = attr->as_boolean (); |
c906108c | 17499 | else |
9c37b5ae | 17500 | TYPE_FIELD_ARTIFICIAL (ftype, iparams) = 0; |
3ce3b1ba PA |
17501 | arg_type = die_type (child_die, cu); |
17502 | ||
17503 | /* RealView does not mark THIS as const, which the testsuite | |
17504 | expects. GCC marks THIS as const in method definitions, | |
17505 | but not in the class specifications (GCC PR 43053). */ | |
17506 | if (cu->language == language_cplus && !TYPE_CONST (arg_type) | |
17507 | && TYPE_FIELD_ARTIFICIAL (ftype, iparams)) | |
17508 | { | |
17509 | int is_this = 0; | |
17510 | struct dwarf2_cu *arg_cu = cu; | |
17511 | const char *name = dwarf2_name (child_die, cu); | |
17512 | ||
17513 | attr = dwarf2_attr (die, DW_AT_object_pointer, cu); | |
435d3d88 | 17514 | if (attr != nullptr) |
3ce3b1ba PA |
17515 | { |
17516 | /* If the compiler emits this, use it. */ | |
17517 | if (follow_die_ref (die, attr, &arg_cu) == child_die) | |
17518 | is_this = 1; | |
17519 | } | |
17520 | else if (name && strcmp (name, "this") == 0) | |
17521 | /* Function definitions will have the argument names. */ | |
17522 | is_this = 1; | |
17523 | else if (name == NULL && iparams == 0) | |
17524 | /* Declarations may not have the names, so like | |
17525 | elsewhere in GDB, assume an artificial first | |
17526 | argument is "this". */ | |
17527 | is_this = 1; | |
17528 | ||
17529 | if (is_this) | |
17530 | arg_type = make_cv_type (1, TYPE_VOLATILE (arg_type), | |
17531 | arg_type, 0); | |
17532 | } | |
17533 | ||
5d14b6e5 | 17534 | ftype->field (iparams).set_type (arg_type); |
c906108c SS |
17535 | iparams++; |
17536 | } | |
436c571c | 17537 | child_die = child_die->sibling; |
c906108c SS |
17538 | } |
17539 | } | |
17540 | ||
76c10ea2 | 17541 | return ftype; |
c906108c SS |
17542 | } |
17543 | ||
f792889a | 17544 | static struct type * |
e7c27a73 | 17545 | read_typedef (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17546 | { |
5e22e966 | 17547 | struct objfile *objfile = cu->per_objfile->objfile; |
0114d602 | 17548 | const char *name = NULL; |
3c8e0968 | 17549 | struct type *this_type, *target_type; |
c906108c | 17550 | |
94af9270 | 17551 | name = dwarf2_full_name (NULL, die, cu); |
19f392bc | 17552 | this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, name); |
8f53807e | 17553 | this_type->set_target_is_stub (true); |
f792889a | 17554 | set_die_type (die, this_type, cu); |
3c8e0968 DE |
17555 | target_type = die_type (die, cu); |
17556 | if (target_type != this_type) | |
17557 | TYPE_TARGET_TYPE (this_type) = target_type; | |
17558 | else | |
17559 | { | |
17560 | /* Self-referential typedefs are, it seems, not allowed by the DWARF | |
17561 | spec and cause infinite loops in GDB. */ | |
b98664d3 | 17562 | complaint (_("Self-referential DW_TAG_typedef " |
9d8780f0 SM |
17563 | "- DIE at %s [in module %s]"), |
17564 | sect_offset_str (die->sect_off), objfile_name (objfile)); | |
3c8e0968 DE |
17565 | TYPE_TARGET_TYPE (this_type) = NULL; |
17566 | } | |
e4003a34 TV |
17567 | if (name == NULL) |
17568 | { | |
17569 | /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates | |
17570 | anonymous typedefs, which is, strictly speaking, invalid DWARF. | |
17571 | Handle these by just returning the target type, rather than | |
17572 | constructing an anonymous typedef type and trying to handle this | |
17573 | elsewhere. */ | |
17574 | set_die_type (die, target_type, cu); | |
17575 | return target_type; | |
17576 | } | |
f792889a | 17577 | return this_type; |
c906108c SS |
17578 | } |
17579 | ||
a625a8c9 TT |
17580 | /* Helper for get_dwarf2_rational_constant that computes the value of |
17581 | a given gmp_mpz given an attribute. */ | |
17582 | ||
17583 | static void | |
17584 | get_mpz (struct dwarf2_cu *cu, gdb_mpz *value, struct attribute *attr) | |
17585 | { | |
17586 | /* GCC will sometimes emit a 16-byte constant value as a DWARF | |
17587 | location expression that pushes an implicit value. */ | |
17588 | if (attr->form == DW_FORM_exprloc) | |
17589 | { | |
17590 | dwarf_block *blk = attr->as_block (); | |
17591 | if (blk->size > 0 && blk->data[0] == DW_OP_implicit_value) | |
17592 | { | |
17593 | uint64_t len; | |
17594 | const gdb_byte *ptr = safe_read_uleb128 (blk->data + 1, | |
17595 | blk->data + blk->size, | |
17596 | &len); | |
17597 | if (ptr - blk->data + len <= blk->size) | |
17598 | { | |
17599 | mpz_import (value->val, len, | |
17600 | bfd_big_endian (cu->per_objfile->objfile->obfd) ? 1 : -1, | |
17601 | 1, 0, 0, ptr); | |
17602 | return; | |
17603 | } | |
17604 | } | |
17605 | ||
17606 | /* On failure set it to 1. */ | |
17607 | *value = gdb_mpz (1); | |
17608 | } | |
17609 | else if (attr->form_is_block ()) | |
17610 | { | |
17611 | dwarf_block *blk = attr->as_block (); | |
17612 | mpz_import (value->val, blk->size, | |
17613 | bfd_big_endian (cu->per_objfile->objfile->obfd) ? 1 : -1, | |
17614 | 1, 0, 0, blk->data); | |
17615 | } | |
17616 | else | |
17617 | *value = gdb_mpz (attr->constant_value (1)); | |
17618 | } | |
17619 | ||
09584414 JB |
17620 | /* Assuming DIE is a rational DW_TAG_constant, read the DIE's |
17621 | numerator and denominator into NUMERATOR and DENOMINATOR (resp). | |
17622 | ||
17623 | If the numerator and/or numerator attribute is missing, | |
17624 | a complaint is filed, and NUMERATOR and DENOMINATOR are left | |
17625 | untouched. */ | |
17626 | ||
17627 | static void | |
17628 | get_dwarf2_rational_constant (struct die_info *die, struct dwarf2_cu *cu, | |
5cde1d82 | 17629 | gdb_mpz *numerator, gdb_mpz *denominator) |
09584414 JB |
17630 | { |
17631 | struct attribute *num_attr, *denom_attr; | |
17632 | ||
17633 | num_attr = dwarf2_attr (die, DW_AT_GNU_numerator, cu); | |
17634 | if (num_attr == nullptr) | |
17635 | complaint (_("DW_AT_GNU_numerator missing in %s DIE at %s"), | |
17636 | dwarf_tag_name (die->tag), sect_offset_str (die->sect_off)); | |
17637 | ||
17638 | denom_attr = dwarf2_attr (die, DW_AT_GNU_denominator, cu); | |
17639 | if (denom_attr == nullptr) | |
17640 | complaint (_("DW_AT_GNU_denominator missing in %s DIE at %s"), | |
17641 | dwarf_tag_name (die->tag), sect_offset_str (die->sect_off)); | |
17642 | ||
17643 | if (num_attr == nullptr || denom_attr == nullptr) | |
17644 | return; | |
17645 | ||
a625a8c9 TT |
17646 | get_mpz (cu, numerator, num_attr); |
17647 | get_mpz (cu, denominator, denom_attr); | |
09584414 JB |
17648 | } |
17649 | ||
17650 | /* Same as get_dwarf2_rational_constant, but extracting an unsigned | |
17651 | rational constant, rather than a signed one. | |
17652 | ||
17653 | If the rational constant has a negative value, a complaint | |
17654 | is filed, and NUMERATOR and DENOMINATOR are left untouched. */ | |
17655 | ||
17656 | static void | |
17657 | get_dwarf2_unsigned_rational_constant (struct die_info *die, | |
17658 | struct dwarf2_cu *cu, | |
5cde1d82 TT |
17659 | gdb_mpz *numerator, |
17660 | gdb_mpz *denominator) | |
09584414 | 17661 | { |
5cde1d82 TT |
17662 | gdb_mpz num (1); |
17663 | gdb_mpz denom (1); | |
09584414 JB |
17664 | |
17665 | get_dwarf2_rational_constant (die, cu, &num, &denom); | |
5cde1d82 | 17666 | if (mpz_sgn (num.val) == -1 && mpz_sgn (denom.val) == -1) |
09584414 | 17667 | { |
5cde1d82 TT |
17668 | mpz_neg (num.val, num.val); |
17669 | mpz_neg (denom.val, denom.val); | |
09584414 | 17670 | } |
5cde1d82 | 17671 | else if (mpz_sgn (num.val) == -1) |
09584414 JB |
17672 | { |
17673 | complaint (_("unexpected negative value for DW_AT_GNU_numerator" | |
17674 | " in DIE at %s"), | |
17675 | sect_offset_str (die->sect_off)); | |
17676 | return; | |
17677 | } | |
5cde1d82 | 17678 | else if (mpz_sgn (denom.val) == -1) |
09584414 JB |
17679 | { |
17680 | complaint (_("unexpected negative value for DW_AT_GNU_denominator" | |
17681 | " in DIE at %s"), | |
17682 | sect_offset_str (die->sect_off)); | |
17683 | return; | |
17684 | } | |
17685 | ||
5cde1d82 TT |
17686 | *numerator = std::move (num); |
17687 | *denominator = std::move (denom); | |
09584414 JB |
17688 | } |
17689 | ||
bbcdf9ab TT |
17690 | /* Assuming that ENCODING is a string whose contents starting at the |
17691 | K'th character is "_nn" where "nn" is a decimal number, scan that | |
17692 | number and set RESULT to the value. K is updated to point to the | |
17693 | character immediately following the number. | |
17694 | ||
17695 | If the string does not conform to the format described above, false | |
17696 | is returned, and K may or may not be changed. */ | |
17697 | ||
17698 | static bool | |
17699 | ada_get_gnat_encoded_number (const char *encoding, int &k, gdb_mpz *result) | |
17700 | { | |
17701 | /* The next character should be an underscore ('_') followed | |
17702 | by a digit. */ | |
17703 | if (encoding[k] != '_' || !isdigit (encoding[k + 1])) | |
17704 | return false; | |
17705 | ||
17706 | /* Skip the underscore. */ | |
17707 | k++; | |
17708 | int start = k; | |
17709 | ||
17710 | /* Determine the number of digits for our number. */ | |
17711 | while (isdigit (encoding[k])) | |
17712 | k++; | |
17713 | if (k == start) | |
17714 | return false; | |
17715 | ||
17716 | std::string copy (&encoding[start], k - start); | |
17717 | if (mpz_set_str (result->val, copy.c_str (), 10) == -1) | |
17718 | return false; | |
17719 | ||
17720 | return true; | |
17721 | } | |
17722 | ||
17723 | /* Scan two numbers from ENCODING at OFFSET, assuming the string is of | |
17724 | the form _NN_DD, where NN and DD are decimal numbers. Set NUM and | |
17725 | DENOM, update OFFSET, and return true on success. Return false on | |
17726 | failure. */ | |
17727 | ||
17728 | static bool | |
17729 | ada_get_gnat_encoded_ratio (const char *encoding, int &offset, | |
17730 | gdb_mpz *num, gdb_mpz *denom) | |
17731 | { | |
17732 | if (!ada_get_gnat_encoded_number (encoding, offset, num)) | |
17733 | return false; | |
17734 | return ada_get_gnat_encoded_number (encoding, offset, denom); | |
17735 | } | |
17736 | ||
09584414 | 17737 | /* Assuming DIE corresponds to a fixed point type, finish the creation |
bbcdf9ab TT |
17738 | of the corresponding TYPE by setting its type-specific data. CU is |
17739 | the DIE's CU. SUFFIX is the "XF" type name suffix coming from GNAT | |
17740 | encodings. It is nullptr if the GNAT encoding should be | |
17741 | ignored. */ | |
09584414 JB |
17742 | |
17743 | static void | |
bbcdf9ab TT |
17744 | finish_fixed_point_type (struct type *type, const char *suffix, |
17745 | struct die_info *die, struct dwarf2_cu *cu) | |
09584414 | 17746 | { |
09584414 JB |
17747 | gdb_assert (type->code () == TYPE_CODE_FIXED_POINT |
17748 | && TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_FIXED_POINT); | |
17749 | ||
bbcdf9ab TT |
17750 | /* If GNAT encodings are preferred, don't examine the |
17751 | attributes. */ | |
17752 | struct attribute *attr = nullptr; | |
17753 | if (suffix == nullptr) | |
17754 | { | |
17755 | attr = dwarf2_attr (die, DW_AT_binary_scale, cu); | |
17756 | if (attr == nullptr) | |
17757 | attr = dwarf2_attr (die, DW_AT_decimal_scale, cu); | |
17758 | if (attr == nullptr) | |
17759 | attr = dwarf2_attr (die, DW_AT_small, cu); | |
17760 | } | |
09584414 | 17761 | |
5cde1d82 TT |
17762 | /* Numerator and denominator of our fixed-point type's scaling factor. |
17763 | The default is a scaling factor of 1, which we use as a fallback | |
17764 | when we are not able to decode it (problem with the debugging info, | |
17765 | unsupported forms, bug in GDB, etc...). Using that as the default | |
17766 | allows us to at least print the unscaled value, which might still | |
17767 | be useful to a user. */ | |
17768 | gdb_mpz scale_num (1); | |
17769 | gdb_mpz scale_denom (1); | |
17770 | ||
09584414 JB |
17771 | if (attr == nullptr) |
17772 | { | |
bbcdf9ab TT |
17773 | int offset = 0; |
17774 | if (suffix != nullptr | |
17775 | && ada_get_gnat_encoded_ratio (suffix, offset, &scale_num, | |
17776 | &scale_denom) | |
17777 | /* The number might be encoded as _nn_dd_nn_dd, where the | |
17778 | second ratio is the 'small value. In this situation, we | |
17779 | want the second value. */ | |
17780 | && (suffix[offset] != '_' | |
17781 | || ada_get_gnat_encoded_ratio (suffix, offset, &scale_num, | |
17782 | &scale_denom))) | |
17783 | { | |
17784 | /* Found it. */ | |
17785 | } | |
17786 | else | |
17787 | { | |
17788 | /* Scaling factor not found. Assume a scaling factor of 1, | |
17789 | and hope for the best. At least the user will be able to | |
17790 | see the encoded value. */ | |
17791 | scale_num = 1; | |
17792 | scale_denom = 1; | |
17793 | complaint (_("no scale found for fixed-point type (DIE at %s)"), | |
17794 | sect_offset_str (die->sect_off)); | |
17795 | } | |
09584414 JB |
17796 | } |
17797 | else if (attr->name == DW_AT_binary_scale) | |
17798 | { | |
17799 | LONGEST scale_exp = attr->constant_value (0); | |
5cde1d82 | 17800 | gdb_mpz *num_or_denom = scale_exp > 0 ? &scale_num : &scale_denom; |
09584414 | 17801 | |
5cde1d82 | 17802 | mpz_mul_2exp (num_or_denom->val, num_or_denom->val, std::abs (scale_exp)); |
09584414 JB |
17803 | } |
17804 | else if (attr->name == DW_AT_decimal_scale) | |
17805 | { | |
17806 | LONGEST scale_exp = attr->constant_value (0); | |
5cde1d82 | 17807 | gdb_mpz *num_or_denom = scale_exp > 0 ? &scale_num : &scale_denom; |
09584414 | 17808 | |
5cde1d82 | 17809 | mpz_ui_pow_ui (num_or_denom->val, 10, std::abs (scale_exp)); |
09584414 JB |
17810 | } |
17811 | else if (attr->name == DW_AT_small) | |
17812 | { | |
17813 | struct die_info *scale_die; | |
17814 | struct dwarf2_cu *scale_cu = cu; | |
17815 | ||
17816 | scale_die = follow_die_ref (die, attr, &scale_cu); | |
17817 | if (scale_die->tag == DW_TAG_constant) | |
17818 | get_dwarf2_unsigned_rational_constant (scale_die, scale_cu, | |
17819 | &scale_num, &scale_denom); | |
17820 | else | |
17821 | complaint (_("%s DIE not supported as target of DW_AT_small attribute" | |
17822 | " (DIE at %s)"), | |
17823 | dwarf_tag_name (die->tag), sect_offset_str (die->sect_off)); | |
17824 | } | |
17825 | else | |
17826 | { | |
17827 | complaint (_("unsupported scale attribute %s for fixed-point type" | |
17828 | " (DIE at %s)"), | |
17829 | dwarf_attr_name (attr->name), | |
17830 | sect_offset_str (die->sect_off)); | |
17831 | } | |
17832 | ||
2a12c336 | 17833 | gdb_mpq &scaling_factor = type->fixed_point_info ().scaling_factor; |
5cde1d82 TT |
17834 | mpz_set (mpq_numref (scaling_factor.val), scale_num.val); |
17835 | mpz_set (mpq_denref (scaling_factor.val), scale_denom.val); | |
09584414 JB |
17836 | mpq_canonicalize (scaling_factor.val); |
17837 | } | |
17838 | ||
bbcdf9ab TT |
17839 | /* The gnat-encoding suffix for fixed point. */ |
17840 | ||
17841 | #define GNAT_FIXED_POINT_SUFFIX "___XF_" | |
17842 | ||
17843 | /* If NAME encodes an Ada fixed-point type, return a pointer to the | |
17844 | "XF" suffix of the name. The text after this is what encodes the | |
17845 | 'small and 'delta information. Otherwise, return nullptr. */ | |
17846 | ||
17847 | static const char * | |
17848 | gnat_encoded_fixed_point_type_info (const char *name) | |
17849 | { | |
17850 | return strstr (name, GNAT_FIXED_POINT_SUFFIX); | |
17851 | } | |
17852 | ||
9b790ce7 UW |
17853 | /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT |
17854 | (which may be different from NAME) to the architecture back-end to allow | |
17855 | it to guess the correct format if necessary. */ | |
17856 | ||
17857 | static struct type * | |
17858 | dwarf2_init_float_type (struct objfile *objfile, int bits, const char *name, | |
103a685e | 17859 | const char *name_hint, enum bfd_endian byte_order) |
9b790ce7 | 17860 | { |
08feed99 | 17861 | struct gdbarch *gdbarch = objfile->arch (); |
9b790ce7 UW |
17862 | const struct floatformat **format; |
17863 | struct type *type; | |
17864 | ||
17865 | format = gdbarch_floatformat_for_type (gdbarch, name_hint, bits); | |
17866 | if (format) | |
103a685e | 17867 | type = init_float_type (objfile, bits, name, format, byte_order); |
9b790ce7 | 17868 | else |
77b7c781 | 17869 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
9b790ce7 UW |
17870 | |
17871 | return type; | |
17872 | } | |
17873 | ||
eb77c9df AB |
17874 | /* Allocate an integer type of size BITS and name NAME. */ |
17875 | ||
17876 | static struct type * | |
17877 | dwarf2_init_integer_type (struct dwarf2_cu *cu, struct objfile *objfile, | |
17878 | int bits, int unsigned_p, const char *name) | |
17879 | { | |
17880 | struct type *type; | |
17881 | ||
17882 | /* Versions of Intel's C Compiler generate an integer type called "void" | |
17883 | instead of using DW_TAG_unspecified_type. This has been seen on | |
17884 | at least versions 14, 17, and 18. */ | |
35ee2dc2 AB |
17885 | if (bits == 0 && producer_is_icc (cu) && name != nullptr |
17886 | && strcmp (name, "void") == 0) | |
eb77c9df AB |
17887 | type = objfile_type (objfile)->builtin_void; |
17888 | else | |
17889 | type = init_integer_type (objfile, bits, unsigned_p, name); | |
17890 | ||
17891 | return type; | |
17892 | } | |
17893 | ||
09584414 JB |
17894 | /* Return true if DIE has a DW_AT_small attribute whose value is |
17895 | a constant rational, where both the numerator and denominator | |
17896 | are equal to zero. | |
17897 | ||
17898 | CU is the DIE's Compilation Unit. */ | |
17899 | ||
17900 | static bool | |
17901 | has_zero_over_zero_small_attribute (struct die_info *die, | |
17902 | struct dwarf2_cu *cu) | |
17903 | { | |
17904 | struct attribute *attr = dwarf2_attr (die, DW_AT_small, cu); | |
17905 | if (attr == nullptr) | |
17906 | return false; | |
17907 | ||
17908 | struct dwarf2_cu *scale_cu = cu; | |
17909 | struct die_info *scale_die | |
17910 | = follow_die_ref (die, attr, &scale_cu); | |
17911 | ||
17912 | if (scale_die->tag != DW_TAG_constant) | |
17913 | return false; | |
17914 | ||
5cde1d82 | 17915 | gdb_mpz num (1), denom (1); |
09584414 | 17916 | get_dwarf2_rational_constant (scale_die, cu, &num, &denom); |
5cde1d82 | 17917 | return mpz_sgn (num.val) == 0 && mpz_sgn (denom.val) == 0; |
09584414 JB |
17918 | } |
17919 | ||
8bdc1658 AB |
17920 | /* Initialise and return a floating point type of size BITS suitable for |
17921 | use as a component of a complex number. The NAME_HINT is passed through | |
17922 | when initialising the floating point type and is the name of the complex | |
17923 | type. | |
17924 | ||
17925 | As DWARF doesn't currently provide an explicit name for the components | |
17926 | of a complex number, but it can be helpful to have these components | |
17927 | named, we try to select a suitable name based on the size of the | |
17928 | component. */ | |
17929 | static struct type * | |
17930 | dwarf2_init_complex_target_type (struct dwarf2_cu *cu, | |
17931 | struct objfile *objfile, | |
103a685e TT |
17932 | int bits, const char *name_hint, |
17933 | enum bfd_endian byte_order) | |
8bdc1658 | 17934 | { |
08feed99 | 17935 | gdbarch *gdbarch = objfile->arch (); |
8bdc1658 AB |
17936 | struct type *tt = nullptr; |
17937 | ||
35add35e AB |
17938 | /* Try to find a suitable floating point builtin type of size BITS. |
17939 | We're going to use the name of this type as the name for the complex | |
17940 | target type that we are about to create. */ | |
1db455a7 | 17941 | switch (cu->language) |
8bdc1658 | 17942 | { |
1db455a7 AB |
17943 | case language_fortran: |
17944 | switch (bits) | |
17945 | { | |
17946 | case 32: | |
17947 | tt = builtin_f_type (gdbarch)->builtin_real; | |
17948 | break; | |
17949 | case 64: | |
17950 | tt = builtin_f_type (gdbarch)->builtin_real_s8; | |
17951 | break; | |
17952 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17953 | case 128: | |
17954 | tt = builtin_f_type (gdbarch)->builtin_real_s16; | |
17955 | break; | |
17956 | } | |
8bdc1658 | 17957 | break; |
1db455a7 AB |
17958 | default: |
17959 | switch (bits) | |
17960 | { | |
17961 | case 32: | |
17962 | tt = builtin_type (gdbarch)->builtin_float; | |
17963 | break; | |
17964 | case 64: | |
17965 | tt = builtin_type (gdbarch)->builtin_double; | |
17966 | break; | |
17967 | case 96: /* The x86-32 ABI specifies 96-bit long double. */ | |
17968 | case 128: | |
17969 | tt = builtin_type (gdbarch)->builtin_long_double; | |
17970 | break; | |
17971 | } | |
8bdc1658 AB |
17972 | break; |
17973 | } | |
17974 | ||
35add35e AB |
17975 | /* If the type we found doesn't match the size we were looking for, then |
17976 | pretend we didn't find a type at all, the complex target type we | |
17977 | create will then be nameless. */ | |
a12e5744 | 17978 | if (tt != nullptr && TYPE_LENGTH (tt) * TARGET_CHAR_BIT != bits) |
35add35e AB |
17979 | tt = nullptr; |
17980 | ||
7d93a1e0 | 17981 | const char *name = (tt == nullptr) ? nullptr : tt->name (); |
103a685e | 17982 | return dwarf2_init_float_type (objfile, bits, name, name_hint, byte_order); |
8bdc1658 AB |
17983 | } |
17984 | ||
c906108c SS |
17985 | /* Find a representation of a given base type and install |
17986 | it in the TYPE field of the die. */ | |
17987 | ||
f792889a | 17988 | static struct type * |
e7c27a73 | 17989 | read_base_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 17990 | { |
5e22e966 | 17991 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c SS |
17992 | struct type *type; |
17993 | struct attribute *attr; | |
19f392bc | 17994 | int encoding = 0, bits = 0; |
15d034d0 | 17995 | const char *name; |
34877895 | 17996 | gdbarch *arch; |
c906108c | 17997 | |
e142c38c | 17998 | attr = dwarf2_attr (die, DW_AT_encoding, cu); |
529908cb TT |
17999 | if (attr != nullptr && attr->form_is_constant ()) |
18000 | encoding = attr->constant_value (0); | |
e142c38c | 18001 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 18002 | if (attr != nullptr) |
529908cb | 18003 | bits = attr->constant_value (0) * TARGET_CHAR_BIT; |
39cbfefa | 18004 | name = dwarf2_name (die, cu); |
6ccb9162 | 18005 | if (!name) |
34877895 | 18006 | complaint (_("DW_AT_name missing from DW_TAG_base_type")); |
103a685e | 18007 | |
08feed99 | 18008 | arch = objfile->arch (); |
103a685e TT |
18009 | enum bfd_endian byte_order = gdbarch_byte_order (arch); |
18010 | ||
34877895 | 18011 | attr = dwarf2_attr (die, DW_AT_endianity, cu); |
529908cb | 18012 | if (attr != nullptr && attr->form_is_constant ()) |
103a685e | 18013 | { |
529908cb | 18014 | int endianity = attr->constant_value (0); |
103a685e TT |
18015 | |
18016 | switch (endianity) | |
18017 | { | |
18018 | case DW_END_big: | |
18019 | byte_order = BFD_ENDIAN_BIG; | |
18020 | break; | |
18021 | case DW_END_little: | |
18022 | byte_order = BFD_ENDIAN_LITTLE; | |
18023 | break; | |
18024 | default: | |
18025 | complaint (_("DW_AT_endianity has unrecognized value %d"), endianity); | |
18026 | break; | |
18027 | } | |
18028 | } | |
6ccb9162 | 18029 | |
09584414 JB |
18030 | if ((encoding == DW_ATE_signed_fixed || encoding == DW_ATE_unsigned_fixed) |
18031 | && cu->language == language_ada | |
18032 | && has_zero_over_zero_small_attribute (die, cu)) | |
18033 | { | |
18034 | /* brobecker/2018-02-24: This is a fixed point type for which | |
18035 | the scaling factor is represented as fraction whose value | |
18036 | does not make sense (zero divided by zero), so we should | |
18037 | normally never see these. However, there is a small category | |
18038 | of fixed point types for which GNAT is unable to provide | |
18039 | the scaling factor via the standard DWARF mechanisms, and | |
18040 | for which the info is provided via the GNAT encodings instead. | |
bbcdf9ab | 18041 | This is likely what this DIE is about. */ |
09584414 JB |
18042 | encoding = (encoding == DW_ATE_signed_fixed |
18043 | ? DW_ATE_signed | |
18044 | : DW_ATE_unsigned); | |
18045 | } | |
18046 | ||
bbcdf9ab TT |
18047 | /* With GNAT encodings, fixed-point information will be encoded in |
18048 | the type name. Note that this can also occur with the above | |
18049 | zero-over-zero case, which is why this is a separate "if" rather | |
18050 | than an "else if". */ | |
18051 | const char *gnat_encoding_suffix = nullptr; | |
18052 | if ((encoding == DW_ATE_signed || encoding == DW_ATE_unsigned) | |
18053 | && cu->language == language_ada | |
18054 | && name != nullptr) | |
18055 | { | |
18056 | gnat_encoding_suffix = gnat_encoded_fixed_point_type_info (name); | |
18057 | if (gnat_encoding_suffix != nullptr) | |
18058 | { | |
18059 | gdb_assert (startswith (gnat_encoding_suffix, | |
18060 | GNAT_FIXED_POINT_SUFFIX)); | |
18061 | name = obstack_strndup (&cu->per_objfile->objfile->objfile_obstack, | |
18062 | name, gnat_encoding_suffix - name); | |
18063 | /* Use -1 here so that SUFFIX points at the "_" after the | |
18064 | "XF". */ | |
18065 | gnat_encoding_suffix += strlen (GNAT_FIXED_POINT_SUFFIX) - 1; | |
18066 | ||
18067 | encoding = (encoding == DW_ATE_signed | |
18068 | ? DW_ATE_signed_fixed | |
18069 | : DW_ATE_unsigned_fixed); | |
18070 | } | |
18071 | } | |
18072 | ||
6ccb9162 | 18073 | switch (encoding) |
c906108c | 18074 | { |
6ccb9162 UW |
18075 | case DW_ATE_address: |
18076 | /* Turn DW_ATE_address into a void * pointer. */ | |
77b7c781 | 18077 | type = init_type (objfile, TYPE_CODE_VOID, TARGET_CHAR_BIT, NULL); |
19f392bc | 18078 | type = init_pointer_type (objfile, bits, name, type); |
6ccb9162 UW |
18079 | break; |
18080 | case DW_ATE_boolean: | |
19f392bc | 18081 | type = init_boolean_type (objfile, bits, 1, name); |
6ccb9162 UW |
18082 | break; |
18083 | case DW_ATE_complex_float: | |
103a685e TT |
18084 | type = dwarf2_init_complex_target_type (cu, objfile, bits / 2, name, |
18085 | byte_order); | |
78134374 | 18086 | if (type->code () == TYPE_CODE_ERROR) |
93689ce9 TT |
18087 | { |
18088 | if (name == nullptr) | |
18089 | { | |
18090 | struct obstack *obstack | |
5e22e966 | 18091 | = &cu->per_objfile->objfile->objfile_obstack; |
7d93a1e0 | 18092 | name = obconcat (obstack, "_Complex ", type->name (), |
93689ce9 TT |
18093 | nullptr); |
18094 | } | |
18095 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); | |
18096 | } | |
18097 | else | |
18098 | type = init_complex_type (name, type); | |
6ccb9162 UW |
18099 | break; |
18100 | case DW_ATE_decimal_float: | |
19f392bc | 18101 | type = init_decfloat_type (objfile, bits, name); |
6ccb9162 UW |
18102 | break; |
18103 | case DW_ATE_float: | |
103a685e | 18104 | type = dwarf2_init_float_type (objfile, bits, name, name, byte_order); |
6ccb9162 UW |
18105 | break; |
18106 | case DW_ATE_signed: | |
eb77c9df | 18107 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
18108 | break; |
18109 | case DW_ATE_unsigned: | |
3b2b8fea TT |
18110 | if (cu->language == language_fortran |
18111 | && name | |
61012eef | 18112 | && startswith (name, "character(")) |
19f392bc UW |
18113 | type = init_character_type (objfile, bits, 1, name); |
18114 | else | |
eb77c9df | 18115 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 UW |
18116 | break; |
18117 | case DW_ATE_signed_char: | |
6e70227d | 18118 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea TT |
18119 | || cu->language == language_pascal |
18120 | || cu->language == language_fortran) | |
19f392bc UW |
18121 | type = init_character_type (objfile, bits, 0, name); |
18122 | else | |
eb77c9df | 18123 | type = dwarf2_init_integer_type (cu, objfile, bits, 0, name); |
6ccb9162 UW |
18124 | break; |
18125 | case DW_ATE_unsigned_char: | |
868a0084 | 18126 | if (cu->language == language_ada || cu->language == language_m2 |
3b2b8fea | 18127 | || cu->language == language_pascal |
c44af4eb TT |
18128 | || cu->language == language_fortran |
18129 | || cu->language == language_rust) | |
19f392bc UW |
18130 | type = init_character_type (objfile, bits, 1, name); |
18131 | else | |
eb77c9df | 18132 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
6ccb9162 | 18133 | break; |
75079b2b | 18134 | case DW_ATE_UTF: |
53e710ac | 18135 | { |
53e710ac PA |
18136 | if (bits == 16) |
18137 | type = builtin_type (arch)->builtin_char16; | |
18138 | else if (bits == 32) | |
18139 | type = builtin_type (arch)->builtin_char32; | |
18140 | else | |
18141 | { | |
b98664d3 | 18142 | complaint (_("unsupported DW_ATE_UTF bit size: '%d'"), |
53e710ac | 18143 | bits); |
eb77c9df | 18144 | type = dwarf2_init_integer_type (cu, objfile, bits, 1, name); |
53e710ac PA |
18145 | } |
18146 | return set_die_type (die, type, cu); | |
18147 | } | |
75079b2b | 18148 | break; |
09584414 JB |
18149 | case DW_ATE_signed_fixed: |
18150 | type = init_fixed_point_type (objfile, bits, 0, name); | |
bbcdf9ab | 18151 | finish_fixed_point_type (type, gnat_encoding_suffix, die, cu); |
09584414 JB |
18152 | break; |
18153 | case DW_ATE_unsigned_fixed: | |
18154 | type = init_fixed_point_type (objfile, bits, 1, name); | |
bbcdf9ab | 18155 | finish_fixed_point_type (type, gnat_encoding_suffix, die, cu); |
09584414 | 18156 | break; |
75079b2b | 18157 | |
6ccb9162 | 18158 | default: |
b98664d3 | 18159 | complaint (_("unsupported DW_AT_encoding: '%s'"), |
6ccb9162 | 18160 | dwarf_type_encoding_name (encoding)); |
77b7c781 | 18161 | type = init_type (objfile, TYPE_CODE_ERROR, bits, name); |
6ccb9162 | 18162 | break; |
c906108c | 18163 | } |
6ccb9162 | 18164 | |
0114d602 | 18165 | if (name && strcmp (name, "char") == 0) |
15152a54 | 18166 | type->set_has_no_signedness (true); |
0114d602 | 18167 | |
2b4424c3 TT |
18168 | maybe_set_alignment (cu, die, type); |
18169 | ||
db558e34 | 18170 | type->set_endianity_is_not_default (gdbarch_byte_order (arch) != byte_order); |
34877895 | 18171 | |
20a5fcbd TT |
18172 | if (TYPE_SPECIFIC_FIELD (type) == TYPE_SPECIFIC_INT) |
18173 | { | |
18174 | attr = dwarf2_attr (die, DW_AT_bit_size, cu); | |
529908cb | 18175 | if (attr != nullptr && attr->as_unsigned () <= 8 * TYPE_LENGTH (type)) |
20a5fcbd | 18176 | { |
529908cb | 18177 | unsigned real_bit_size = attr->as_unsigned (); |
20a5fcbd TT |
18178 | attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); |
18179 | /* Only use the attributes if they make sense together. */ | |
18180 | if (attr == nullptr | |
529908cb TT |
18181 | || (attr->as_unsigned () + real_bit_size |
18182 | <= 8 * TYPE_LENGTH (type))) | |
20a5fcbd TT |
18183 | { |
18184 | TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_size | |
18185 | = real_bit_size; | |
18186 | if (attr != nullptr) | |
18187 | TYPE_MAIN_TYPE (type)->type_specific.int_stuff.bit_offset | |
529908cb | 18188 | = attr->as_unsigned (); |
20a5fcbd TT |
18189 | } |
18190 | } | |
18191 | } | |
18192 | ||
f792889a | 18193 | return set_die_type (die, type, cu); |
c906108c SS |
18194 | } |
18195 | ||
80180f79 SA |
18196 | /* Parse dwarf attribute if it's a block, reference or constant and put the |
18197 | resulting value of the attribute into struct bound_prop. | |
18198 | Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */ | |
18199 | ||
18200 | static int | |
18201 | attr_to_dynamic_prop (const struct attribute *attr, struct die_info *die, | |
9a49df9d AB |
18202 | struct dwarf2_cu *cu, struct dynamic_prop *prop, |
18203 | struct type *default_type) | |
80180f79 SA |
18204 | { |
18205 | struct dwarf2_property_baton *baton; | |
5e22e966 | 18206 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba TT |
18207 | struct objfile *objfile = per_objfile->objfile; |
18208 | struct obstack *obstack = &objfile->objfile_obstack; | |
80180f79 | 18209 | |
9a49df9d AB |
18210 | gdb_assert (default_type != NULL); |
18211 | ||
80180f79 SA |
18212 | if (attr == NULL || prop == NULL) |
18213 | return 0; | |
18214 | ||
4fc6c0d5 | 18215 | if (attr->form_is_block ()) |
80180f79 | 18216 | { |
8d749320 | 18217 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18218 | baton->property_type = default_type; |
80180f79 | 18219 | baton->locexpr.per_cu = cu->per_cu; |
a50264ba | 18220 | baton->locexpr.per_objfile = per_objfile; |
9d2246fc TT |
18221 | |
18222 | struct dwarf_block *block = attr->as_block (); | |
18223 | baton->locexpr.size = block->size; | |
18224 | baton->locexpr.data = block->data; | |
216a7e6b AB |
18225 | switch (attr->name) |
18226 | { | |
18227 | case DW_AT_string_length: | |
18228 | baton->locexpr.is_reference = true; | |
18229 | break; | |
18230 | default: | |
18231 | baton->locexpr.is_reference = false; | |
18232 | break; | |
18233 | } | |
8c2e4e06 SM |
18234 | |
18235 | prop->set_locexpr (baton); | |
18236 | gdb_assert (prop->baton () != NULL); | |
80180f79 | 18237 | } |
cd6c91b4 | 18238 | else if (attr->form_is_ref ()) |
80180f79 SA |
18239 | { |
18240 | struct dwarf2_cu *target_cu = cu; | |
18241 | struct die_info *target_die; | |
18242 | struct attribute *target_attr; | |
18243 | ||
18244 | target_die = follow_die_ref (die, attr, &target_cu); | |
18245 | target_attr = dwarf2_attr (target_die, DW_AT_location, target_cu); | |
df25ebbd JB |
18246 | if (target_attr == NULL) |
18247 | target_attr = dwarf2_attr (target_die, DW_AT_data_member_location, | |
18248 | target_cu); | |
80180f79 SA |
18249 | if (target_attr == NULL) |
18250 | return 0; | |
18251 | ||
df25ebbd | 18252 | switch (target_attr->name) |
80180f79 | 18253 | { |
df25ebbd | 18254 | case DW_AT_location: |
cd6c91b4 | 18255 | if (target_attr->form_is_section_offset ()) |
df25ebbd | 18256 | { |
8d749320 | 18257 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18258 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd | 18259 | fill_in_loclist_baton (cu, &baton->loclist, target_attr); |
8c2e4e06 SM |
18260 | prop->set_loclist (baton); |
18261 | gdb_assert (prop->baton () != NULL); | |
df25ebbd | 18262 | } |
4fc6c0d5 | 18263 | else if (target_attr->form_is_block ()) |
df25ebbd | 18264 | { |
8d749320 | 18265 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18266 | baton->property_type = die_type (target_die, target_cu); |
df25ebbd | 18267 | baton->locexpr.per_cu = cu->per_cu; |
a50264ba | 18268 | baton->locexpr.per_objfile = per_objfile; |
9d2246fc TT |
18269 | struct dwarf_block *block = target_attr->as_block (); |
18270 | baton->locexpr.size = block->size; | |
18271 | baton->locexpr.data = block->data; | |
9a49df9d | 18272 | baton->locexpr.is_reference = true; |
8c2e4e06 SM |
18273 | prop->set_locexpr (baton); |
18274 | gdb_assert (prop->baton () != NULL); | |
df25ebbd JB |
18275 | } |
18276 | else | |
18277 | { | |
18278 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", | |
18279 | "dynamic property"); | |
18280 | return 0; | |
18281 | } | |
18282 | break; | |
18283 | case DW_AT_data_member_location: | |
18284 | { | |
18285 | LONGEST offset; | |
18286 | ||
18287 | if (!handle_data_member_location (target_die, target_cu, | |
18288 | &offset)) | |
18289 | return 0; | |
18290 | ||
8d749320 | 18291 | baton = XOBNEW (obstack, struct dwarf2_property_baton); |
9a49df9d | 18292 | baton->property_type = read_type_die (target_die->parent, |
6ad395a7 | 18293 | target_cu); |
df25ebbd JB |
18294 | baton->offset_info.offset = offset; |
18295 | baton->offset_info.type = die_type (target_die, target_cu); | |
8c2e4e06 | 18296 | prop->set_addr_offset (baton); |
df25ebbd JB |
18297 | break; |
18298 | } | |
80180f79 SA |
18299 | } |
18300 | } | |
cd6c91b4 | 18301 | else if (attr->form_is_constant ()) |
8c2e4e06 | 18302 | prop->set_const_val (attr->constant_value (0)); |
80180f79 SA |
18303 | else |
18304 | { | |
18305 | dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr->form), | |
18306 | dwarf2_name (die, cu)); | |
18307 | return 0; | |
18308 | } | |
18309 | ||
18310 | return 1; | |
18311 | } | |
18312 | ||
09ba997f | 18313 | /* See read.h. */ |
9a49df9d | 18314 | |
09ba997f | 18315 | struct type * |
293e7e51 | 18316 | dwarf2_per_objfile::int_type (int size_in_bytes, bool unsigned_p) const |
9a49df9d | 18317 | { |
9a49df9d AB |
18318 | struct type *int_type; |
18319 | ||
18320 | /* Helper macro to examine the various builtin types. */ | |
11a8b164 AB |
18321 | #define TRY_TYPE(F) \ |
18322 | int_type = (unsigned_p \ | |
18323 | ? objfile_type (objfile)->builtin_unsigned_ ## F \ | |
18324 | : objfile_type (objfile)->builtin_ ## F); \ | |
18325 | if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \ | |
9a49df9d AB |
18326 | return int_type |
18327 | ||
18328 | TRY_TYPE (char); | |
18329 | TRY_TYPE (short); | |
18330 | TRY_TYPE (int); | |
18331 | TRY_TYPE (long); | |
18332 | TRY_TYPE (long_long); | |
18333 | ||
18334 | #undef TRY_TYPE | |
18335 | ||
18336 | gdb_assert_not_reached ("unable to find suitable integer type"); | |
18337 | } | |
18338 | ||
b86352cf AB |
18339 | /* Read the DW_AT_type attribute for a sub-range. If this attribute is not |
18340 | present (which is valid) then compute the default type based on the | |
18341 | compilation units address size. */ | |
18342 | ||
18343 | static struct type * | |
18344 | read_subrange_index_type (struct die_info *die, struct dwarf2_cu *cu) | |
18345 | { | |
18346 | struct type *index_type = die_type (die, cu); | |
18347 | ||
18348 | /* Dwarf-2 specifications explicitly allows to create subrange types | |
18349 | without specifying a base type. | |
18350 | In that case, the base type must be set to the type of | |
18351 | the lower bound, upper bound or count, in that order, if any of these | |
18352 | three attributes references an object that has a type. | |
18353 | If no base type is found, the Dwarf-2 specifications say that | |
18354 | a signed integer type of size equal to the size of an address should | |
18355 | be used. | |
18356 | For the following C code: `extern char gdb_int [];' | |
18357 | GCC produces an empty range DIE. | |
18358 | FIXME: muller/2010-05-28: Possible references to object for low bound, | |
18359 | high bound or count are not yet handled by this code. */ | |
78134374 | 18360 | if (index_type->code () == TYPE_CODE_VOID) |
293e7e51 | 18361 | index_type = cu->addr_sized_int_type (false); |
b86352cf AB |
18362 | |
18363 | return index_type; | |
18364 | } | |
18365 | ||
a02abb62 JB |
18366 | /* Read the given DW_AT_subrange DIE. */ |
18367 | ||
f792889a | 18368 | static struct type * |
a02abb62 JB |
18369 | read_subrange_type (struct die_info *die, struct dwarf2_cu *cu) |
18370 | { | |
4c9ad8c2 | 18371 | struct type *base_type, *orig_base_type; |
a02abb62 JB |
18372 | struct type *range_type; |
18373 | struct attribute *attr; | |
729efb13 | 18374 | struct dynamic_prop low, high; |
4fae6e18 | 18375 | int low_default_is_valid; |
c451ebe5 | 18376 | int high_bound_is_count = 0; |
15d034d0 | 18377 | const char *name; |
d359392f | 18378 | ULONGEST negative_mask; |
e77813c8 | 18379 | |
b86352cf AB |
18380 | orig_base_type = read_subrange_index_type (die, cu); |
18381 | ||
4c9ad8c2 TT |
18382 | /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED, |
18383 | whereas the real type might be. So, we use ORIG_BASE_TYPE when | |
18384 | creating the range type, but we use the result of check_typedef | |
18385 | when examining properties of the type. */ | |
18386 | base_type = check_typedef (orig_base_type); | |
a02abb62 | 18387 | |
7e314c57 JK |
18388 | /* The die_type call above may have already set the type for this DIE. */ |
18389 | range_type = get_die_type (die, cu); | |
18390 | if (range_type) | |
18391 | return range_type; | |
18392 | ||
8c2e4e06 | 18393 | high.set_const_val (0); |
729efb13 | 18394 | |
4fae6e18 JK |
18395 | /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow |
18396 | omitting DW_AT_lower_bound. */ | |
18397 | switch (cu->language) | |
6e70227d | 18398 | { |
4fae6e18 JK |
18399 | case language_c: |
18400 | case language_cplus: | |
8c2e4e06 | 18401 | low.set_const_val (0); |
4fae6e18 JK |
18402 | low_default_is_valid = 1; |
18403 | break; | |
18404 | case language_fortran: | |
8c2e4e06 | 18405 | low.set_const_val (1); |
4fae6e18 JK |
18406 | low_default_is_valid = 1; |
18407 | break; | |
18408 | case language_d: | |
4fae6e18 | 18409 | case language_objc: |
c44af4eb | 18410 | case language_rust: |
8c2e4e06 | 18411 | low.set_const_val (0); |
4fae6e18 JK |
18412 | low_default_is_valid = (cu->header.version >= 4); |
18413 | break; | |
18414 | case language_ada: | |
18415 | case language_m2: | |
18416 | case language_pascal: | |
8c2e4e06 | 18417 | low.set_const_val (1); |
4fae6e18 JK |
18418 | low_default_is_valid = (cu->header.version >= 4); |
18419 | break; | |
18420 | default: | |
8c2e4e06 | 18421 | low.set_const_val (0); |
4fae6e18 JK |
18422 | low_default_is_valid = 0; |
18423 | break; | |
a02abb62 JB |
18424 | } |
18425 | ||
e142c38c | 18426 | attr = dwarf2_attr (die, DW_AT_lower_bound, cu); |
435d3d88 | 18427 | if (attr != nullptr) |
9a49df9d | 18428 | attr_to_dynamic_prop (attr, die, cu, &low, base_type); |
4fae6e18 | 18429 | else if (!low_default_is_valid) |
b98664d3 | 18430 | complaint (_("Missing DW_AT_lower_bound " |
9d8780f0 SM |
18431 | "- DIE at %s [in module %s]"), |
18432 | sect_offset_str (die->sect_off), | |
5e22e966 | 18433 | objfile_name (cu->per_objfile->objfile)); |
a02abb62 | 18434 | |
506f5c41 TV |
18435 | struct attribute *attr_ub, *attr_count; |
18436 | attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu); | |
9a49df9d | 18437 | if (!attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
e77813c8 | 18438 | { |
506f5c41 | 18439 | attr = attr_count = dwarf2_attr (die, DW_AT_count, cu); |
9a49df9d | 18440 | if (attr_to_dynamic_prop (attr, die, cu, &high, base_type)) |
6b662e19 | 18441 | { |
c451ebe5 | 18442 | /* If bounds are constant do the final calculation here. */ |
8c2e4e06 SM |
18443 | if (low.kind () == PROP_CONST && high.kind () == PROP_CONST) |
18444 | high.set_const_val (low.const_val () + high.const_val () - 1); | |
c451ebe5 SA |
18445 | else |
18446 | high_bound_is_count = 1; | |
c2ff108b | 18447 | } |
506f5c41 TV |
18448 | else |
18449 | { | |
18450 | if (attr_ub != NULL) | |
18451 | complaint (_("Unresolved DW_AT_upper_bound " | |
18452 | "- DIE at %s [in module %s]"), | |
18453 | sect_offset_str (die->sect_off), | |
5e22e966 | 18454 | objfile_name (cu->per_objfile->objfile)); |
506f5c41 TV |
18455 | if (attr_count != NULL) |
18456 | complaint (_("Unresolved DW_AT_count " | |
18457 | "- DIE at %s [in module %s]"), | |
18458 | sect_offset_str (die->sect_off), | |
5e22e966 | 18459 | objfile_name (cu->per_objfile->objfile)); |
506f5c41 | 18460 | } |
e77813c8 | 18461 | } |
a02abb62 | 18462 | |
4e962e74 TT |
18463 | LONGEST bias = 0; |
18464 | struct attribute *bias_attr = dwarf2_attr (die, DW_AT_GNU_bias, cu); | |
cd6c91b4 | 18465 | if (bias_attr != nullptr && bias_attr->form_is_constant ()) |
0826b30a | 18466 | bias = bias_attr->constant_value (0); |
4e962e74 | 18467 | |
dbb9c2b1 JB |
18468 | /* Normally, the DWARF producers are expected to use a signed |
18469 | constant form (Eg. DW_FORM_sdata) to express negative bounds. | |
18470 | But this is unfortunately not always the case, as witnessed | |
18471 | with GCC, for instance, where the ambiguous DW_FORM_dataN form | |
18472 | is used instead. To work around that ambiguity, we treat | |
18473 | the bounds as signed, and thus sign-extend their values, when | |
18474 | the base type is signed. */ | |
6e70227d | 18475 | negative_mask = |
d359392f | 18476 | -((ULONGEST) 1 << (TYPE_LENGTH (base_type) * TARGET_CHAR_BIT - 1)); |
8c2e4e06 | 18477 | if (low.kind () == PROP_CONST |
c6d940a9 | 18478 | && !base_type->is_unsigned () && (low.const_val () & negative_mask)) |
8c2e4e06 SM |
18479 | low.set_const_val (low.const_val () | negative_mask); |
18480 | if (high.kind () == PROP_CONST | |
c6d940a9 | 18481 | && !base_type->is_unsigned () && (high.const_val () & negative_mask)) |
8c2e4e06 | 18482 | high.set_const_val (high.const_val () | negative_mask); |
43bbcdc2 | 18483 | |
5bbd8269 AB |
18484 | /* Check for bit and byte strides. */ |
18485 | struct dynamic_prop byte_stride_prop; | |
18486 | attribute *attr_byte_stride = dwarf2_attr (die, DW_AT_byte_stride, cu); | |
18487 | if (attr_byte_stride != nullptr) | |
18488 | { | |
293e7e51 | 18489 | struct type *prop_type = cu->addr_sized_int_type (false); |
5bbd8269 AB |
18490 | attr_to_dynamic_prop (attr_byte_stride, die, cu, &byte_stride_prop, |
18491 | prop_type); | |
18492 | } | |
18493 | ||
18494 | struct dynamic_prop bit_stride_prop; | |
18495 | attribute *attr_bit_stride = dwarf2_attr (die, DW_AT_bit_stride, cu); | |
18496 | if (attr_bit_stride != nullptr) | |
18497 | { | |
18498 | /* It only makes sense to have either a bit or byte stride. */ | |
18499 | if (attr_byte_stride != nullptr) | |
18500 | { | |
18501 | complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride " | |
18502 | "- DIE at %s [in module %s]"), | |
18503 | sect_offset_str (die->sect_off), | |
5e22e966 | 18504 | objfile_name (cu->per_objfile->objfile)); |
5bbd8269 AB |
18505 | attr_bit_stride = nullptr; |
18506 | } | |
18507 | else | |
18508 | { | |
293e7e51 | 18509 | struct type *prop_type = cu->addr_sized_int_type (false); |
5bbd8269 AB |
18510 | attr_to_dynamic_prop (attr_bit_stride, die, cu, &bit_stride_prop, |
18511 | prop_type); | |
18512 | } | |
18513 | } | |
18514 | ||
18515 | if (attr_byte_stride != nullptr | |
18516 | || attr_bit_stride != nullptr) | |
18517 | { | |
18518 | bool byte_stride_p = (attr_byte_stride != nullptr); | |
18519 | struct dynamic_prop *stride | |
18520 | = byte_stride_p ? &byte_stride_prop : &bit_stride_prop; | |
18521 | ||
18522 | range_type | |
18523 | = create_range_type_with_stride (NULL, orig_base_type, &low, | |
18524 | &high, bias, stride, byte_stride_p); | |
18525 | } | |
18526 | else | |
18527 | range_type = create_range_type (NULL, orig_base_type, &low, &high, bias); | |
a02abb62 | 18528 | |
c451ebe5 | 18529 | if (high_bound_is_count) |
599088e3 | 18530 | range_type->bounds ()->flag_upper_bound_is_count = 1; |
c451ebe5 | 18531 | |
c2ff108b JK |
18532 | /* Ada expects an empty array on no boundary attributes. */ |
18533 | if (attr == NULL && cu->language != language_ada) | |
8c2e4e06 | 18534 | range_type->bounds ()->high.set_undefined (); |
c2ff108b | 18535 | |
39cbfefa DJ |
18536 | name = dwarf2_name (die, cu); |
18537 | if (name) | |
d0e39ea2 | 18538 | range_type->set_name (name); |
6e70227d | 18539 | |
e142c38c | 18540 | attr = dwarf2_attr (die, DW_AT_byte_size, cu); |
435d3d88 | 18541 | if (attr != nullptr) |
529908cb | 18542 | TYPE_LENGTH (range_type) = attr->constant_value (0); |
a02abb62 | 18543 | |
2b4424c3 TT |
18544 | maybe_set_alignment (cu, die, range_type); |
18545 | ||
7e314c57 JK |
18546 | set_die_type (die, range_type, cu); |
18547 | ||
18548 | /* set_die_type should be already done. */ | |
b4ba55a1 JB |
18549 | set_descriptive_type (range_type, die, cu); |
18550 | ||
7e314c57 | 18551 | return range_type; |
a02abb62 | 18552 | } |
6e70227d | 18553 | |
f792889a | 18554 | static struct type * |
81a17f79 JB |
18555 | read_unspecified_type (struct die_info *die, struct dwarf2_cu *cu) |
18556 | { | |
18557 | struct type *type; | |
81a17f79 | 18558 | |
5e22e966 | 18559 | type = init_type (cu->per_objfile->objfile, TYPE_CODE_VOID, 0, NULL); |
d0e39ea2 | 18560 | type->set_name (dwarf2_name (die, cu)); |
81a17f79 | 18561 | |
74a2f8ff | 18562 | /* In Ada, an unspecified type is typically used when the description |
85102364 | 18563 | of the type is deferred to a different unit. When encountering |
74a2f8ff JB |
18564 | such a type, we treat it as a stub, and try to resolve it later on, |
18565 | when needed. */ | |
18566 | if (cu->language == language_ada) | |
b4b73759 | 18567 | type->set_is_stub (true); |
74a2f8ff | 18568 | |
f792889a | 18569 | return set_die_type (die, type, cu); |
81a17f79 | 18570 | } |
a02abb62 | 18571 | |
639d11d3 DC |
18572 | /* Read a single die and all its descendents. Set the die's sibling |
18573 | field to NULL; set other fields in the die correctly, and set all | |
18574 | of the descendents' fields correctly. Set *NEW_INFO_PTR to the | |
18575 | location of the info_ptr after reading all of those dies. PARENT | |
18576 | is the parent of the die in question. */ | |
18577 | ||
18578 | static struct die_info * | |
dee91e82 | 18579 | read_die_and_children (const struct die_reader_specs *reader, |
d521ce57 TT |
18580 | const gdb_byte *info_ptr, |
18581 | const gdb_byte **new_info_ptr, | |
dee91e82 | 18582 | struct die_info *parent) |
639d11d3 DC |
18583 | { |
18584 | struct die_info *die; | |
d521ce57 | 18585 | const gdb_byte *cur_ptr; |
639d11d3 | 18586 | |
3e225074 | 18587 | cur_ptr = read_full_die_1 (reader, &die, info_ptr, 0); |
1d325ec1 DJ |
18588 | if (die == NULL) |
18589 | { | |
18590 | *new_info_ptr = cur_ptr; | |
18591 | return NULL; | |
18592 | } | |
93311388 | 18593 | store_in_ref_table (die, reader->cu); |
639d11d3 | 18594 | |
3e225074 | 18595 | if (die->has_children) |
bf6af496 | 18596 | die->child = read_die_and_siblings_1 (reader, cur_ptr, new_info_ptr, die); |
639d11d3 DC |
18597 | else |
18598 | { | |
18599 | die->child = NULL; | |
18600 | *new_info_ptr = cur_ptr; | |
18601 | } | |
18602 | ||
18603 | die->sibling = NULL; | |
18604 | die->parent = parent; | |
18605 | return die; | |
18606 | } | |
18607 | ||
18608 | /* Read a die, all of its descendents, and all of its siblings; set | |
18609 | all of the fields of all of the dies correctly. Arguments are as | |
18610 | in read_die_and_children. */ | |
18611 | ||
18612 | static struct die_info * | |
bf6af496 | 18613 | read_die_and_siblings_1 (const struct die_reader_specs *reader, |
d521ce57 TT |
18614 | const gdb_byte *info_ptr, |
18615 | const gdb_byte **new_info_ptr, | |
bf6af496 | 18616 | struct die_info *parent) |
639d11d3 DC |
18617 | { |
18618 | struct die_info *first_die, *last_sibling; | |
d521ce57 | 18619 | const gdb_byte *cur_ptr; |
639d11d3 | 18620 | |
c906108c | 18621 | cur_ptr = info_ptr; |
639d11d3 DC |
18622 | first_die = last_sibling = NULL; |
18623 | ||
18624 | while (1) | |
c906108c | 18625 | { |
639d11d3 | 18626 | struct die_info *die |
dee91e82 | 18627 | = read_die_and_children (reader, cur_ptr, &cur_ptr, parent); |
639d11d3 | 18628 | |
1d325ec1 | 18629 | if (die == NULL) |
c906108c | 18630 | { |
639d11d3 DC |
18631 | *new_info_ptr = cur_ptr; |
18632 | return first_die; | |
c906108c | 18633 | } |
1d325ec1 DJ |
18634 | |
18635 | if (!first_die) | |
18636 | first_die = die; | |
c906108c | 18637 | else |
1d325ec1 DJ |
18638 | last_sibling->sibling = die; |
18639 | ||
18640 | last_sibling = die; | |
c906108c | 18641 | } |
c906108c SS |
18642 | } |
18643 | ||
bf6af496 DE |
18644 | /* Read a die, all of its descendents, and all of its siblings; set |
18645 | all of the fields of all of the dies correctly. Arguments are as | |
18646 | in read_die_and_children. | |
18647 | This the main entry point for reading a DIE and all its children. */ | |
18648 | ||
18649 | static struct die_info * | |
18650 | read_die_and_siblings (const struct die_reader_specs *reader, | |
d521ce57 TT |
18651 | const gdb_byte *info_ptr, |
18652 | const gdb_byte **new_info_ptr, | |
bf6af496 DE |
18653 | struct die_info *parent) |
18654 | { | |
18655 | struct die_info *die = read_die_and_siblings_1 (reader, info_ptr, | |
18656 | new_info_ptr, parent); | |
18657 | ||
b4f54984 | 18658 | if (dwarf_die_debug) |
bf6af496 DE |
18659 | { |
18660 | fprintf_unfiltered (gdb_stdlog, | |
18661 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 18662 | reader->die_section->get_name (), |
bf6af496 DE |
18663 | (unsigned) (info_ptr - reader->die_section->buffer), |
18664 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18665 | dump_die (die, dwarf_die_debug); |
bf6af496 DE |
18666 | } |
18667 | ||
18668 | return die; | |
18669 | } | |
18670 | ||
3019eac3 DE |
18671 | /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS |
18672 | attributes. | |
18673 | The caller is responsible for filling in the extra attributes | |
18674 | and updating (*DIEP)->num_attrs. | |
18675 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 18676 | except for its child, sibling, and parent fields. */ |
93311388 | 18677 | |
d521ce57 | 18678 | static const gdb_byte * |
3019eac3 | 18679 | read_full_die_1 (const struct die_reader_specs *reader, |
d521ce57 | 18680 | struct die_info **diep, const gdb_byte *info_ptr, |
3e225074 | 18681 | int num_extra_attrs) |
93311388 | 18682 | { |
b64f50a1 | 18683 | unsigned int abbrev_number, bytes_read, i; |
7c32eebb | 18684 | const struct abbrev_info *abbrev; |
93311388 DE |
18685 | struct die_info *die; |
18686 | struct dwarf2_cu *cu = reader->cu; | |
18687 | bfd *abfd = reader->abfd; | |
18688 | ||
9c541725 | 18689 | sect_offset sect_off = (sect_offset) (info_ptr - reader->buffer); |
93311388 DE |
18690 | abbrev_number = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
18691 | info_ptr += bytes_read; | |
18692 | if (!abbrev_number) | |
18693 | { | |
18694 | *diep = NULL; | |
93311388 DE |
18695 | return info_ptr; |
18696 | } | |
18697 | ||
685af9cd | 18698 | abbrev = reader->abbrev_table->lookup_abbrev (abbrev_number); |
93311388 | 18699 | if (!abbrev) |
348e048f DE |
18700 | error (_("Dwarf Error: could not find abbrev number %d [in module %s]"), |
18701 | abbrev_number, | |
18702 | bfd_get_filename (abfd)); | |
18703 | ||
3019eac3 | 18704 | die = dwarf_alloc_die (cu, abbrev->num_attrs + num_extra_attrs); |
9c541725 | 18705 | die->sect_off = sect_off; |
93311388 DE |
18706 | die->tag = abbrev->tag; |
18707 | die->abbrev = abbrev_number; | |
3e225074 | 18708 | die->has_children = abbrev->has_children; |
93311388 | 18709 | |
3019eac3 DE |
18710 | /* Make the result usable. |
18711 | The caller needs to update num_attrs after adding the extra | |
18712 | attributes. */ | |
93311388 DE |
18713 | die->num_attrs = abbrev->num_attrs; |
18714 | ||
7a5f294d | 18715 | bool any_need_reprocess = false; |
93311388 | 18716 | for (i = 0; i < abbrev->num_attrs; ++i) |
18a8505e | 18717 | { |
7a5f294d TT |
18718 | info_ptr = read_attribute (reader, &die->attrs[i], &abbrev->attrs[i], |
18719 | info_ptr); | |
18720 | if (die->attrs[i].requires_reprocessing_p ()) | |
18721 | any_need_reprocess = true; | |
18a8505e AT |
18722 | } |
18723 | ||
052c8bb8 | 18724 | struct attribute *attr = die->attr (DW_AT_str_offsets_base); |
529908cb TT |
18725 | if (attr != nullptr && attr->form_is_unsigned ()) |
18726 | cu->str_offsets_base = attr->as_unsigned (); | |
93311388 | 18727 | |
41144253 | 18728 | attr = die->attr (DW_AT_loclists_base); |
18729 | if (attr != nullptr) | |
529908cb | 18730 | cu->loclist_base = attr->as_unsigned (); |
41144253 | 18731 | |
a39fdb41 | 18732 | auto maybe_addr_base = die->addr_base (); |
18a8505e AT |
18733 | if (maybe_addr_base.has_value ()) |
18734 | cu->addr_base = *maybe_addr_base; | |
d0ce17d8 CT |
18735 | |
18736 | attr = die->attr (DW_AT_rnglists_base); | |
18737 | if (attr != nullptr) | |
2b0c7f41 | 18738 | cu->rnglists_base = attr->as_unsigned (); |
d0ce17d8 | 18739 | |
7a5f294d TT |
18740 | if (any_need_reprocess) |
18741 | { | |
18742 | for (i = 0; i < abbrev->num_attrs; ++i) | |
18743 | { | |
18744 | if (die->attrs[i].requires_reprocessing_p ()) | |
18745 | read_attribute_reprocess (reader, &die->attrs[i], die->tag); | |
18746 | } | |
18747 | } | |
93311388 | 18748 | *diep = die; |
93311388 DE |
18749 | return info_ptr; |
18750 | } | |
18751 | ||
3019eac3 DE |
18752 | /* Read a die and all its attributes. |
18753 | Set DIEP to point to a newly allocated die with its information, | |
3e225074 | 18754 | except for its child, sibling, and parent fields. */ |
3019eac3 | 18755 | |
d521ce57 | 18756 | static const gdb_byte * |
3019eac3 | 18757 | read_full_die (const struct die_reader_specs *reader, |
3e225074 | 18758 | struct die_info **diep, const gdb_byte *info_ptr) |
3019eac3 | 18759 | { |
d521ce57 | 18760 | const gdb_byte *result; |
bf6af496 | 18761 | |
3e225074 | 18762 | result = read_full_die_1 (reader, diep, info_ptr, 0); |
bf6af496 | 18763 | |
b4f54984 | 18764 | if (dwarf_die_debug) |
bf6af496 DE |
18765 | { |
18766 | fprintf_unfiltered (gdb_stdlog, | |
18767 | "Read die from %s@0x%x of %s:\n", | |
96b79293 | 18768 | reader->die_section->get_name (), |
bf6af496 DE |
18769 | (unsigned) (info_ptr - reader->die_section->buffer), |
18770 | bfd_get_filename (reader->abfd)); | |
b4f54984 | 18771 | dump_die (*diep, dwarf_die_debug); |
bf6af496 DE |
18772 | } |
18773 | ||
18774 | return result; | |
3019eac3 | 18775 | } |
433df2d4 | 18776 | \f |
c906108c | 18777 | |
72bf9492 DJ |
18778 | /* Returns nonzero if TAG represents a type that we might generate a partial |
18779 | symbol for. */ | |
18780 | ||
18781 | static int | |
d8f62e84 | 18782 | is_type_tag_for_partial (int tag, enum language lang) |
72bf9492 DJ |
18783 | { |
18784 | switch (tag) | |
18785 | { | |
18786 | #if 0 | |
18787 | /* Some types that would be reasonable to generate partial symbols for, | |
d8f62e84 TT |
18788 | that we don't at present. Note that normally this does not |
18789 | matter, mainly because C compilers don't give names to these | |
18790 | types, but instead emit DW_TAG_typedef. */ | |
72bf9492 DJ |
18791 | case DW_TAG_file_type: |
18792 | case DW_TAG_ptr_to_member_type: | |
18793 | case DW_TAG_set_type: | |
18794 | case DW_TAG_string_type: | |
18795 | case DW_TAG_subroutine_type: | |
18796 | #endif | |
d8f62e84 TT |
18797 | |
18798 | /* GNAT may emit an array with a name, but no typedef, so we | |
18799 | need to make a symbol in this case. */ | |
18800 | case DW_TAG_array_type: | |
18801 | return lang == language_ada; | |
18802 | ||
72bf9492 DJ |
18803 | case DW_TAG_base_type: |
18804 | case DW_TAG_class_type: | |
680b30c7 | 18805 | case DW_TAG_interface_type: |
72bf9492 DJ |
18806 | case DW_TAG_enumeration_type: |
18807 | case DW_TAG_structure_type: | |
18808 | case DW_TAG_subrange_type: | |
18809 | case DW_TAG_typedef: | |
18810 | case DW_TAG_union_type: | |
18811 | return 1; | |
18812 | default: | |
18813 | return 0; | |
18814 | } | |
18815 | } | |
18816 | ||
18817 | /* Load all DIEs that are interesting for partial symbols into memory. */ | |
18818 | ||
18819 | static struct partial_die_info * | |
dee91e82 | 18820 | load_partial_dies (const struct die_reader_specs *reader, |
d521ce57 | 18821 | const gdb_byte *info_ptr, int building_psymtab) |
72bf9492 | 18822 | { |
dee91e82 | 18823 | struct dwarf2_cu *cu = reader->cu; |
5e22e966 | 18824 | struct objfile *objfile = cu->per_objfile->objfile; |
72bf9492 | 18825 | struct partial_die_info *parent_die, *last_die, *first_die = NULL; |
72bf9492 | 18826 | unsigned int bytes_read; |
5afb4e99 | 18827 | unsigned int load_all = 0; |
72bf9492 DJ |
18828 | int nesting_level = 1; |
18829 | ||
18830 | parent_die = NULL; | |
18831 | last_die = NULL; | |
18832 | ||
7adf1e79 DE |
18833 | gdb_assert (cu->per_cu != NULL); |
18834 | if (cu->per_cu->load_all_dies) | |
5afb4e99 DJ |
18835 | load_all = 1; |
18836 | ||
72bf9492 DJ |
18837 | cu->partial_dies |
18838 | = htab_create_alloc_ex (cu->header.length / 12, | |
18839 | partial_die_hash, | |
18840 | partial_die_eq, | |
18841 | NULL, | |
18842 | &cu->comp_unit_obstack, | |
18843 | hashtab_obstack_allocate, | |
18844 | dummy_obstack_deallocate); | |
18845 | ||
72bf9492 DJ |
18846 | while (1) |
18847 | { | |
7c32eebb TT |
18848 | const abbrev_info *abbrev = peek_die_abbrev (*reader, info_ptr, |
18849 | &bytes_read); | |
72bf9492 DJ |
18850 | |
18851 | /* A NULL abbrev means the end of a series of children. */ | |
18852 | if (abbrev == NULL) | |
18853 | { | |
18854 | if (--nesting_level == 0) | |
cd9983dd YQ |
18855 | return first_die; |
18856 | ||
72bf9492 DJ |
18857 | info_ptr += bytes_read; |
18858 | last_die = parent_die; | |
18859 | parent_die = parent_die->die_parent; | |
18860 | continue; | |
18861 | } | |
18862 | ||
98bfdba5 PA |
18863 | /* Check for template arguments. We never save these; if |
18864 | they're seen, we just mark the parent, and go on our way. */ | |
18865 | if (parent_die != NULL | |
18866 | && cu->language == language_cplus | |
18867 | && (abbrev->tag == DW_TAG_template_type_param | |
18868 | || abbrev->tag == DW_TAG_template_value_param)) | |
18869 | { | |
18870 | parent_die->has_template_arguments = 1; | |
18871 | ||
18872 | if (!load_all) | |
18873 | { | |
18874 | /* We don't need a partial DIE for the template argument. */ | |
dee91e82 | 18875 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18876 | continue; |
18877 | } | |
18878 | } | |
18879 | ||
0d99eb77 | 18880 | /* We only recurse into c++ subprograms looking for template arguments. |
98bfdba5 PA |
18881 | Skip their other children. */ |
18882 | if (!load_all | |
18883 | && cu->language == language_cplus | |
18884 | && parent_die != NULL | |
f9b5d5ea TV |
18885 | && parent_die->tag == DW_TAG_subprogram |
18886 | && abbrev->tag != DW_TAG_inlined_subroutine) | |
98bfdba5 | 18887 | { |
dee91e82 | 18888 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
98bfdba5 PA |
18889 | continue; |
18890 | } | |
18891 | ||
5afb4e99 DJ |
18892 | /* Check whether this DIE is interesting enough to save. Normally |
18893 | we would not be interested in members here, but there may be | |
18894 | later variables referencing them via DW_AT_specification (for | |
18895 | static members). */ | |
18896 | if (!load_all | |
d8f62e84 | 18897 | && !is_type_tag_for_partial (abbrev->tag, cu->language) |
72929c62 | 18898 | && abbrev->tag != DW_TAG_constant |
72bf9492 DJ |
18899 | && abbrev->tag != DW_TAG_enumerator |
18900 | && abbrev->tag != DW_TAG_subprogram | |
b1dc1806 | 18901 | && abbrev->tag != DW_TAG_inlined_subroutine |
bc30ff58 | 18902 | && abbrev->tag != DW_TAG_lexical_block |
72bf9492 | 18903 | && abbrev->tag != DW_TAG_variable |
5afb4e99 | 18904 | && abbrev->tag != DW_TAG_namespace |
f55ee35c | 18905 | && abbrev->tag != DW_TAG_module |
95554aad | 18906 | && abbrev->tag != DW_TAG_member |
74921315 KS |
18907 | && abbrev->tag != DW_TAG_imported_unit |
18908 | && abbrev->tag != DW_TAG_imported_declaration) | |
72bf9492 DJ |
18909 | { |
18910 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 18911 | info_ptr = skip_one_die (reader, info_ptr + bytes_read, abbrev); |
72bf9492 DJ |
18912 | continue; |
18913 | } | |
18914 | ||
6f06d47b YQ |
18915 | struct partial_die_info pdi ((sect_offset) (info_ptr - reader->buffer), |
18916 | abbrev); | |
cd9983dd | 18917 | |
48fbe735 | 18918 | info_ptr = pdi.read (reader, *abbrev, info_ptr + bytes_read); |
72bf9492 DJ |
18919 | |
18920 | /* This two-pass algorithm for processing partial symbols has a | |
18921 | high cost in cache pressure. Thus, handle some simple cases | |
18922 | here which cover the majority of C partial symbols. DIEs | |
18923 | which neither have specification tags in them, nor could have | |
18924 | specification tags elsewhere pointing at them, can simply be | |
18925 | processed and discarded. | |
18926 | ||
18927 | This segment is also optional; scan_partial_symbols and | |
18928 | add_partial_symbol will handle these DIEs if we chain | |
18929 | them in normally. When compilers which do not emit large | |
18930 | quantities of duplicate debug information are more common, | |
18931 | this code can probably be removed. */ | |
18932 | ||
18933 | /* Any complete simple types at the top level (pretty much all | |
18934 | of them, for a language without namespaces), can be processed | |
18935 | directly. */ | |
18936 | if (parent_die == NULL | |
cd9983dd YQ |
18937 | && pdi.has_specification == 0 |
18938 | && pdi.is_declaration == 0 | |
18939 | && ((pdi.tag == DW_TAG_typedef && !pdi.has_children) | |
18940 | || pdi.tag == DW_TAG_base_type | |
d8f62e84 | 18941 | || pdi.tag == DW_TAG_array_type |
cd9983dd | 18942 | || pdi.tag == DW_TAG_subrange_type)) |
72bf9492 | 18943 | { |
7d00ffec | 18944 | if (building_psymtab && pdi.raw_name != NULL) |
f0fbb768 TT |
18945 | add_partial_symbol (&pdi, cu); |
18946 | ||
cd9983dd | 18947 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18948 | continue; |
18949 | } | |
18950 | ||
d8228535 JK |
18951 | /* The exception for DW_TAG_typedef with has_children above is |
18952 | a workaround of GCC PR debug/47510. In the case of this complaint | |
a737d952 | 18953 | type_name_or_error will error on such types later. |
d8228535 JK |
18954 | |
18955 | GDB skipped children of DW_TAG_typedef by the shortcut above and then | |
18956 | it could not find the child DIEs referenced later, this is checked | |
18957 | above. In correct DWARF DW_TAG_typedef should have no children. */ | |
18958 | ||
cd9983dd | 18959 | if (pdi.tag == DW_TAG_typedef && pdi.has_children) |
b98664d3 | 18960 | complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug " |
9d8780f0 | 18961 | "- DIE at %s [in module %s]"), |
cd9983dd | 18962 | sect_offset_str (pdi.sect_off), objfile_name (objfile)); |
d8228535 | 18963 | |
72bf9492 DJ |
18964 | /* If we're at the second level, and we're an enumerator, and |
18965 | our parent has no specification (meaning possibly lives in a | |
18966 | namespace elsewhere), then we can add the partial symbol now | |
18967 | instead of queueing it. */ | |
cd9983dd | 18968 | if (pdi.tag == DW_TAG_enumerator |
72bf9492 DJ |
18969 | && parent_die != NULL |
18970 | && parent_die->die_parent == NULL | |
18971 | && parent_die->tag == DW_TAG_enumeration_type | |
18972 | && parent_die->has_specification == 0) | |
18973 | { | |
7d00ffec | 18974 | if (pdi.raw_name == NULL) |
b98664d3 | 18975 | complaint (_("malformed enumerator DIE ignored")); |
72bf9492 | 18976 | else if (building_psymtab) |
f0fbb768 | 18977 | add_partial_symbol (&pdi, cu); |
72bf9492 | 18978 | |
cd9983dd | 18979 | info_ptr = locate_pdi_sibling (reader, &pdi, info_ptr); |
72bf9492 DJ |
18980 | continue; |
18981 | } | |
18982 | ||
cd9983dd | 18983 | struct partial_die_info *part_die |
6f06d47b | 18984 | = new (&cu->comp_unit_obstack) partial_die_info (pdi); |
cd9983dd | 18985 | |
72bf9492 DJ |
18986 | /* We'll save this DIE so link it in. */ |
18987 | part_die->die_parent = parent_die; | |
18988 | part_die->die_sibling = NULL; | |
18989 | part_die->die_child = NULL; | |
18990 | ||
18991 | if (last_die && last_die == parent_die) | |
18992 | last_die->die_child = part_die; | |
18993 | else if (last_die) | |
18994 | last_die->die_sibling = part_die; | |
18995 | ||
18996 | last_die = part_die; | |
18997 | ||
18998 | if (first_die == NULL) | |
18999 | first_die = part_die; | |
19000 | ||
19001 | /* Maybe add the DIE to the hash table. Not all DIEs that we | |
19002 | find interesting need to be in the hash table, because we | |
19003 | also have the parent/sibling/child chains; only those that we | |
19004 | might refer to by offset later during partial symbol reading. | |
19005 | ||
19006 | For now this means things that might have be the target of a | |
19007 | DW_AT_specification, DW_AT_abstract_origin, or | |
19008 | DW_AT_extension. DW_AT_extension will refer only to | |
19009 | namespaces; DW_AT_abstract_origin refers to functions (and | |
19010 | many things under the function DIE, but we do not recurse | |
19011 | into function DIEs during partial symbol reading) and | |
19012 | possibly variables as well; DW_AT_specification refers to | |
19013 | declarations. Declarations ought to have the DW_AT_declaration | |
19014 | flag. It happens that GCC forgets to put it in sometimes, but | |
19015 | only for functions, not for types. | |
19016 | ||
19017 | Adding more things than necessary to the hash table is harmless | |
19018 | except for the performance cost. Adding too few will result in | |
5afb4e99 DJ |
19019 | wasted time in find_partial_die, when we reread the compilation |
19020 | unit with load_all_dies set. */ | |
72bf9492 | 19021 | |
5afb4e99 | 19022 | if (load_all |
72929c62 | 19023 | || abbrev->tag == DW_TAG_constant |
5afb4e99 | 19024 | || abbrev->tag == DW_TAG_subprogram |
72bf9492 DJ |
19025 | || abbrev->tag == DW_TAG_variable |
19026 | || abbrev->tag == DW_TAG_namespace | |
19027 | || part_die->is_declaration) | |
19028 | { | |
19029 | void **slot; | |
19030 | ||
19031 | slot = htab_find_slot_with_hash (cu->partial_dies, part_die, | |
9c541725 PA |
19032 | to_underlying (part_die->sect_off), |
19033 | INSERT); | |
72bf9492 DJ |
19034 | *slot = part_die; |
19035 | } | |
19036 | ||
72bf9492 | 19037 | /* For some DIEs we want to follow their children (if any). For C |
bc30ff58 | 19038 | we have no reason to follow the children of structures; for other |
98bfdba5 PA |
19039 | languages we have to, so that we can get at method physnames |
19040 | to infer fully qualified class names, for DW_AT_specification, | |
19041 | and for C++ template arguments. For C++, we also look one level | |
19042 | inside functions to find template arguments (if the name of the | |
19043 | function does not already contain the template arguments). | |
bc30ff58 | 19044 | |
0a4b0913 AB |
19045 | For Ada and Fortran, we need to scan the children of subprograms |
19046 | and lexical blocks as well because these languages allow the | |
19047 | definition of nested entities that could be interesting for the | |
19048 | debugger, such as nested subprograms for instance. */ | |
72bf9492 | 19049 | if (last_die->has_children |
5afb4e99 DJ |
19050 | && (load_all |
19051 | || last_die->tag == DW_TAG_namespace | |
f55ee35c | 19052 | || last_die->tag == DW_TAG_module |
72bf9492 | 19053 | || last_die->tag == DW_TAG_enumeration_type |
98bfdba5 PA |
19054 | || (cu->language == language_cplus |
19055 | && last_die->tag == DW_TAG_subprogram | |
7d00ffec TT |
19056 | && (last_die->raw_name == NULL |
19057 | || strchr (last_die->raw_name, '<') == NULL)) | |
72bf9492 DJ |
19058 | || (cu->language != language_c |
19059 | && (last_die->tag == DW_TAG_class_type | |
680b30c7 | 19060 | || last_die->tag == DW_TAG_interface_type |
72bf9492 | 19061 | || last_die->tag == DW_TAG_structure_type |
bc30ff58 | 19062 | || last_die->tag == DW_TAG_union_type)) |
0a4b0913 AB |
19063 | || ((cu->language == language_ada |
19064 | || cu->language == language_fortran) | |
bc30ff58 JB |
19065 | && (last_die->tag == DW_TAG_subprogram |
19066 | || last_die->tag == DW_TAG_lexical_block)))) | |
72bf9492 DJ |
19067 | { |
19068 | nesting_level++; | |
19069 | parent_die = last_die; | |
19070 | continue; | |
19071 | } | |
19072 | ||
19073 | /* Otherwise we skip to the next sibling, if any. */ | |
dee91e82 | 19074 | info_ptr = locate_pdi_sibling (reader, last_die, info_ptr); |
72bf9492 DJ |
19075 | |
19076 | /* Back to the top, do it again. */ | |
19077 | } | |
19078 | } | |
19079 | ||
6f06d47b | 19080 | partial_die_info::partial_die_info (sect_offset sect_off_, |
7c32eebb | 19081 | const struct abbrev_info *abbrev) |
6f06d47b YQ |
19082 | : partial_die_info (sect_off_, abbrev->tag, abbrev->has_children) |
19083 | { | |
19084 | } | |
19085 | ||
7d00ffec TT |
19086 | /* See class definition. */ |
19087 | ||
19088 | const char * | |
19089 | partial_die_info::name (dwarf2_cu *cu) | |
19090 | { | |
19091 | if (!canonical_name && raw_name != nullptr) | |
19092 | { | |
19093 | struct objfile *objfile = cu->per_objfile->objfile; | |
19094 | raw_name = dwarf2_canonicalize_name (raw_name, cu, objfile); | |
19095 | canonical_name = 1; | |
19096 | } | |
19097 | ||
19098 | return raw_name; | |
19099 | } | |
19100 | ||
35cc7ed7 YQ |
19101 | /* Read a minimal amount of information into the minimal die structure. |
19102 | INFO_PTR should point just after the initial uleb128 of a DIE. */ | |
c906108c | 19103 | |
48fbe735 YQ |
19104 | const gdb_byte * |
19105 | partial_die_info::read (const struct die_reader_specs *reader, | |
19106 | const struct abbrev_info &abbrev, const gdb_byte *info_ptr) | |
c906108c | 19107 | { |
dee91e82 | 19108 | struct dwarf2_cu *cu = reader->cu; |
976ca316 | 19109 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
fa238c03 | 19110 | unsigned int i; |
c5aa993b | 19111 | int has_low_pc_attr = 0; |
c906108c | 19112 | int has_high_pc_attr = 0; |
91da1414 | 19113 | int high_pc_relative = 0; |
c906108c | 19114 | |
fd0a254f | 19115 | for (i = 0; i < abbrev.num_attrs; ++i) |
c906108c | 19116 | { |
e7da7f8f | 19117 | attribute attr; |
7a5f294d | 19118 | info_ptr = read_attribute (reader, &attr, &abbrev.attrs[i], info_ptr); |
18a8505e | 19119 | /* String and address offsets that need to do the reprocessing have |
dda83cd7 | 19120 | already been read at this point, so there is no need to wait until |
18a8505e | 19121 | the loop terminates to do the reprocessing. */ |
7a5f294d | 19122 | if (attr.requires_reprocessing_p ()) |
d0ce17d8 | 19123 | read_attribute_reprocess (reader, &attr, tag); |
c906108c | 19124 | /* Store the data if it is of an attribute we want to keep in a |
dda83cd7 | 19125 | partial symbol table. */ |
c906108c SS |
19126 | switch (attr.name) |
19127 | { | |
19128 | case DW_AT_name: | |
48fbe735 | 19129 | switch (tag) |
71c25dea TT |
19130 | { |
19131 | case DW_TAG_compile_unit: | |
95554aad | 19132 | case DW_TAG_partial_unit: |
348e048f | 19133 | case DW_TAG_type_unit: |
71c25dea TT |
19134 | /* Compilation units have a DW_AT_name that is a filename, not |
19135 | a source language identifier. */ | |
19136 | case DW_TAG_enumeration_type: | |
19137 | case DW_TAG_enumerator: | |
19138 | /* These tags always have simple identifiers already; no need | |
19139 | to canonicalize them. */ | |
7d00ffec | 19140 | canonical_name = 1; |
2c830f54 | 19141 | raw_name = attr.as_string (); |
71c25dea TT |
19142 | break; |
19143 | default: | |
7d00ffec | 19144 | canonical_name = 0; |
2c830f54 | 19145 | raw_name = attr.as_string (); |
71c25dea TT |
19146 | break; |
19147 | } | |
c906108c | 19148 | break; |
31ef98ae | 19149 | case DW_AT_linkage_name: |
c906108c | 19150 | case DW_AT_MIPS_linkage_name: |
31ef98ae TT |
19151 | /* Note that both forms of linkage name might appear. We |
19152 | assume they will be the same, and we only store the last | |
19153 | one we see. */ | |
95f982e5 | 19154 | linkage_name = attr.as_string (); |
c906108c SS |
19155 | break; |
19156 | case DW_AT_low_pc: | |
19157 | has_low_pc_attr = 1; | |
95f982e5 | 19158 | lowpc = attr.as_address (); |
c906108c SS |
19159 | break; |
19160 | case DW_AT_high_pc: | |
19161 | has_high_pc_attr = 1; | |
95f982e5 | 19162 | highpc = attr.as_address (); |
cd6c91b4 | 19163 | if (cu->header.version >= 4 && attr.form_is_constant ()) |
31aa7e4e | 19164 | high_pc_relative = 1; |
c906108c SS |
19165 | break; |
19166 | case DW_AT_location: | |
dda83cd7 SM |
19167 | /* Support the .debug_loc offsets. */ |
19168 | if (attr.form_is_block ()) | |
19169 | { | |
9d2246fc | 19170 | d.locdesc = attr.as_block (); |
dda83cd7 SM |
19171 | } |
19172 | else if (attr.form_is_section_offset ()) | |
19173 | { | |
4d3c2250 | 19174 | dwarf2_complex_location_expr_complaint (); |
dda83cd7 SM |
19175 | } |
19176 | else | |
19177 | { | |
4d3c2250 KB |
19178 | dwarf2_invalid_attrib_class_complaint ("DW_AT_location", |
19179 | "partial symbol information"); | |
dda83cd7 | 19180 | } |
c906108c | 19181 | break; |
c906108c | 19182 | case DW_AT_external: |
c45bc3f8 | 19183 | is_external = attr.as_boolean (); |
c906108c SS |
19184 | break; |
19185 | case DW_AT_declaration: | |
c45bc3f8 | 19186 | is_declaration = attr.as_boolean (); |
c906108c SS |
19187 | break; |
19188 | case DW_AT_type: | |
48fbe735 | 19189 | has_type = 1; |
c906108c SS |
19190 | break; |
19191 | case DW_AT_abstract_origin: | |
19192 | case DW_AT_specification: | |
72bf9492 | 19193 | case DW_AT_extension: |
48fbe735 | 19194 | has_specification = 1; |
0826b30a | 19195 | spec_offset = attr.get_ref_die_offset (); |
48fbe735 | 19196 | spec_is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
36586728 | 19197 | || cu->per_cu->is_dwz); |
c906108c SS |
19198 | break; |
19199 | case DW_AT_sibling: | |
19200 | /* Ignore absolute siblings, they might point outside of | |
19201 | the current compile unit. */ | |
19202 | if (attr.form == DW_FORM_ref_addr) | |
b98664d3 | 19203 | complaint (_("ignoring absolute DW_AT_sibling")); |
c906108c | 19204 | else |
b9502d3f | 19205 | { |
48fbe735 | 19206 | const gdb_byte *buffer = reader->buffer; |
0826b30a | 19207 | sect_offset off = attr.get_ref_die_offset (); |
9c541725 | 19208 | const gdb_byte *sibling_ptr = buffer + to_underlying (off); |
b9502d3f WN |
19209 | |
19210 | if (sibling_ptr < info_ptr) | |
b98664d3 | 19211 | complaint (_("DW_AT_sibling points backwards")); |
22869d73 | 19212 | else if (sibling_ptr > reader->buffer_end) |
a0194fa8 | 19213 | reader->die_section->overflow_complaint (); |
b9502d3f | 19214 | else |
48fbe735 | 19215 | sibling = sibling_ptr; |
b9502d3f | 19216 | } |
c906108c | 19217 | break; |
dda83cd7 SM |
19218 | case DW_AT_byte_size: |
19219 | has_byte_size = 1; | |
19220 | break; | |
19221 | case DW_AT_const_value: | |
19222 | has_const_value = 1; | |
19223 | break; | |
68511cec CES |
19224 | case DW_AT_calling_convention: |
19225 | /* DWARF doesn't provide a way to identify a program's source-level | |
19226 | entry point. DW_AT_calling_convention attributes are only meant | |
19227 | to describe functions' calling conventions. | |
19228 | ||
19229 | However, because it's a necessary piece of information in | |
0c1b455e TT |
19230 | Fortran, and before DWARF 4 DW_CC_program was the only |
19231 | piece of debugging information whose definition refers to | |
19232 | a 'main program' at all, several compilers marked Fortran | |
19233 | main programs with DW_CC_program --- even when those | |
19234 | functions use the standard calling conventions. | |
19235 | ||
19236 | Although DWARF now specifies a way to provide this | |
19237 | information, we support this practice for backward | |
19238 | compatibility. */ | |
529908cb | 19239 | if (attr.constant_value (0) == DW_CC_program |
0c1b455e | 19240 | && cu->language == language_fortran) |
48fbe735 | 19241 | main_subprogram = 1; |
68511cec | 19242 | break; |
481860b3 | 19243 | case DW_AT_inline: |
529908cb TT |
19244 | { |
19245 | LONGEST value = attr.constant_value (-1); | |
19246 | if (value == DW_INL_inlined | |
19247 | || value == DW_INL_declared_inlined) | |
19248 | may_be_inlined = 1; | |
19249 | } | |
481860b3 | 19250 | break; |
95554aad TT |
19251 | |
19252 | case DW_AT_import: | |
48fbe735 | 19253 | if (tag == DW_TAG_imported_unit) |
36586728 | 19254 | { |
0826b30a | 19255 | d.sect_off = attr.get_ref_die_offset (); |
48fbe735 | 19256 | is_dwz = (attr.form == DW_FORM_GNU_ref_alt |
36586728 TT |
19257 | || cu->per_cu->is_dwz); |
19258 | } | |
95554aad TT |
19259 | break; |
19260 | ||
0c1b455e | 19261 | case DW_AT_main_subprogram: |
c45bc3f8 | 19262 | main_subprogram = attr.as_boolean (); |
0c1b455e TT |
19263 | break; |
19264 | ||
05caa1d2 TT |
19265 | case DW_AT_ranges: |
19266 | { | |
2b0c7f41 SM |
19267 | /* Offset in the .debug_ranges or .debug_rnglist section (depending |
19268 | on DWARF version). */ | |
19269 | ULONGEST ranges_offset = attr.as_unsigned (); | |
19270 | ||
19271 | /* See dwarf2_cu::gnu_ranges_base's doc for why we might want to add | |
19272 | this value. */ | |
19273 | if (tag != DW_TAG_compile_unit) | |
19274 | ranges_offset += cu->gnu_ranges_base; | |
19275 | ||
05caa1d2 | 19276 | if (dwarf2_ranges_read (ranges_offset, &lowpc, &highpc, cu, |
d0ce17d8 | 19277 | nullptr, tag)) |
05caa1d2 TT |
19278 | has_pc_info = 1; |
19279 | } | |
19280 | break; | |
19281 | ||
c906108c SS |
19282 | default: |
19283 | break; | |
19284 | } | |
19285 | } | |
19286 | ||
10d06d82 TT |
19287 | /* For Ada, if both the name and the linkage name appear, we prefer |
19288 | the latter. This lets "catch exception" work better, regardless | |
19289 | of the order in which the name and linkage name were emitted. | |
19290 | Really, though, this is just a workaround for the fact that gdb | |
19291 | doesn't store both the name and the linkage name. */ | |
19292 | if (cu->language == language_ada && linkage_name != nullptr) | |
7d00ffec | 19293 | raw_name = linkage_name; |
10d06d82 | 19294 | |
91da1414 | 19295 | if (high_pc_relative) |
48fbe735 | 19296 | highpc += lowpc; |
91da1414 | 19297 | |
9373cf26 JK |
19298 | if (has_low_pc_attr && has_high_pc_attr) |
19299 | { | |
19300 | /* When using the GNU linker, .gnu.linkonce. sections are used to | |
19301 | eliminate duplicate copies of functions and vtables and such. | |
19302 | The linker will arbitrarily choose one and discard the others. | |
19303 | The AT_*_pc values for such functions refer to local labels in | |
19304 | these sections. If the section from that file was discarded, the | |
19305 | labels are not in the output, so the relocs get a value of 0. | |
19306 | If this is a discarded function, mark the pc bounds as invalid, | |
19307 | so that GDB will ignore it. */ | |
976ca316 | 19308 | if (lowpc == 0 && !per_objfile->per_bfd->has_section_at_zero) |
9373cf26 | 19309 | { |
976ca316 | 19310 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 19311 | struct gdbarch *gdbarch = objfile->arch (); |
9373cf26 | 19312 | |
b98664d3 | 19313 | complaint (_("DW_AT_low_pc %s is zero " |
9d8780f0 | 19314 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
19315 | paddress (gdbarch, lowpc), |
19316 | sect_offset_str (sect_off), | |
9d8780f0 | 19317 | objfile_name (objfile)); |
9373cf26 JK |
19318 | } |
19319 | /* dwarf2_get_pc_bounds has also the strict low < high requirement. */ | |
48fbe735 | 19320 | else if (lowpc >= highpc) |
9373cf26 | 19321 | { |
976ca316 | 19322 | struct objfile *objfile = per_objfile->objfile; |
08feed99 | 19323 | struct gdbarch *gdbarch = objfile->arch (); |
9373cf26 | 19324 | |
b98664d3 | 19325 | complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s " |
9d8780f0 | 19326 | "for DIE at %s [in module %s]"), |
48fbe735 YQ |
19327 | paddress (gdbarch, lowpc), |
19328 | paddress (gdbarch, highpc), | |
19329 | sect_offset_str (sect_off), | |
9c541725 | 19330 | objfile_name (objfile)); |
9373cf26 JK |
19331 | } |
19332 | else | |
48fbe735 | 19333 | has_pc_info = 1; |
9373cf26 | 19334 | } |
85cbf3d3 | 19335 | |
c906108c SS |
19336 | return info_ptr; |
19337 | } | |
19338 | ||
72bf9492 DJ |
19339 | /* Find a cached partial DIE at OFFSET in CU. */ |
19340 | ||
d590ff25 YQ |
19341 | struct partial_die_info * |
19342 | dwarf2_cu::find_partial_die (sect_offset sect_off) | |
72bf9492 DJ |
19343 | { |
19344 | struct partial_die_info *lookup_die = NULL; | |
6f06d47b | 19345 | struct partial_die_info part_die (sect_off); |
72bf9492 | 19346 | |
9a3c8263 | 19347 | lookup_die = ((struct partial_die_info *) |
d590ff25 | 19348 | htab_find_with_hash (partial_dies, &part_die, |
9c541725 | 19349 | to_underlying (sect_off))); |
72bf9492 | 19350 | |
72bf9492 DJ |
19351 | return lookup_die; |
19352 | } | |
19353 | ||
348e048f DE |
19354 | /* Find a partial DIE at OFFSET, which may or may not be in CU, |
19355 | except in the case of .debug_types DIEs which do not reference | |
19356 | outside their CU (they do however referencing other types via | |
55f1336d | 19357 | DW_FORM_ref_sig8). */ |
72bf9492 | 19358 | |
122cf0f2 | 19359 | static const struct cu_partial_die_info |
9c541725 | 19360 | find_partial_die (sect_offset sect_off, int offset_in_dwz, struct dwarf2_cu *cu) |
72bf9492 | 19361 | { |
976ca316 SM |
19362 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
19363 | struct objfile *objfile = per_objfile->objfile; | |
5afb4e99 | 19364 | struct partial_die_info *pd = NULL; |
72bf9492 | 19365 | |
36586728 | 19366 | if (offset_in_dwz == cu->per_cu->is_dwz |
4057dfde | 19367 | && cu->header.offset_in_cu_p (sect_off)) |
5afb4e99 | 19368 | { |
d590ff25 | 19369 | pd = cu->find_partial_die (sect_off); |
5afb4e99 | 19370 | if (pd != NULL) |
fb816e8b | 19371 | return { cu, pd }; |
0d99eb77 DE |
19372 | /* We missed recording what we needed. |
19373 | Load all dies and try again. */ | |
5afb4e99 | 19374 | } |
0d99eb77 DE |
19375 | else |
19376 | { | |
19377 | /* TUs don't reference other CUs/TUs (except via type signatures). */ | |
3019eac3 | 19378 | if (cu->per_cu->is_debug_types) |
0d99eb77 | 19379 | { |
9d8780f0 SM |
19380 | error (_("Dwarf Error: Type Unit at offset %s contains" |
19381 | " external reference to offset %s [in module %s].\n"), | |
19382 | sect_offset_str (cu->header.sect_off), sect_offset_str (sect_off), | |
0d99eb77 DE |
19383 | bfd_get_filename (objfile->obfd)); |
19384 | } | |
7188ed02 SM |
19385 | dwarf2_per_cu_data *per_cu |
19386 | = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, | |
976ca316 | 19387 | per_objfile); |
72bf9492 | 19388 | |
976ca316 | 19389 | cu = per_objfile->get_cu (per_cu); |
7188ed02 | 19390 | if (cu == NULL || cu->partial_dies == NULL) |
976ca316 | 19391 | load_partial_comp_unit (per_cu, per_objfile, nullptr); |
ae038cb0 | 19392 | |
976ca316 | 19393 | cu = per_objfile->get_cu (per_cu); |
7188ed02 SM |
19394 | |
19395 | cu->last_used = 0; | |
19396 | pd = cu->find_partial_die (sect_off); | |
0d99eb77 | 19397 | } |
5afb4e99 | 19398 | |
dee91e82 DE |
19399 | /* If we didn't find it, and not all dies have been loaded, |
19400 | load them all and try again. */ | |
19401 | ||
7188ed02 | 19402 | if (pd == NULL && cu->per_cu->load_all_dies == 0) |
5afb4e99 | 19403 | { |
7188ed02 | 19404 | cu->per_cu->load_all_dies = 1; |
fd820528 DE |
19405 | |
19406 | /* This is nasty. When we reread the DIEs, somewhere up the call chain | |
19407 | THIS_CU->cu may already be in use. So we can't just free it and | |
19408 | replace its DIEs with the ones we read in. Instead, we leave those | |
19409 | DIEs alone (which can still be in use, e.g. in scan_partial_symbols), | |
19410 | and clobber THIS_CU->cu->partial_dies with the hash table for the new | |
19411 | set. */ | |
976ca316 | 19412 | load_partial_comp_unit (cu->per_cu, per_objfile, cu); |
5afb4e99 | 19413 | |
7188ed02 | 19414 | pd = cu->find_partial_die (sect_off); |
5afb4e99 DJ |
19415 | } |
19416 | ||
19417 | if (pd == NULL) | |
521894aa | 19418 | error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"), |
9d8780f0 | 19419 | sect_offset_str (sect_off), bfd_get_filename (objfile->obfd)); |
7188ed02 | 19420 | return { cu, pd }; |
72bf9492 DJ |
19421 | } |
19422 | ||
abc72ce4 DE |
19423 | /* See if we can figure out if the class lives in a namespace. We do |
19424 | this by looking for a member function; its demangled name will | |
19425 | contain namespace info, if there is any. */ | |
19426 | ||
19427 | static void | |
19428 | guess_partial_die_structure_name (struct partial_die_info *struct_pdi, | |
19429 | struct dwarf2_cu *cu) | |
19430 | { | |
19431 | /* NOTE: carlton/2003-10-07: Getting the info this way changes | |
19432 | what template types look like, because the demangler | |
19433 | frequently doesn't give the same name as the debug info. We | |
19434 | could fix this by only using the demangled name to get the | |
19435 | prefix (but see comment in read_structure_type). */ | |
19436 | ||
19437 | struct partial_die_info *real_pdi; | |
19438 | struct partial_die_info *child_pdi; | |
19439 | ||
19440 | /* If this DIE (this DIE's specification, if any) has a parent, then | |
19441 | we should not do this. We'll prepend the parent's fully qualified | |
19442 | name when we create the partial symbol. */ | |
19443 | ||
19444 | real_pdi = struct_pdi; | |
19445 | while (real_pdi->has_specification) | |
fb816e8b | 19446 | { |
122cf0f2 AB |
19447 | auto res = find_partial_die (real_pdi->spec_offset, |
19448 | real_pdi->spec_is_dwz, cu); | |
fb816e8b TV |
19449 | real_pdi = res.pdi; |
19450 | cu = res.cu; | |
19451 | } | |
abc72ce4 DE |
19452 | |
19453 | if (real_pdi->die_parent != NULL) | |
19454 | return; | |
19455 | ||
19456 | for (child_pdi = struct_pdi->die_child; | |
19457 | child_pdi != NULL; | |
19458 | child_pdi = child_pdi->die_sibling) | |
19459 | { | |
19460 | if (child_pdi->tag == DW_TAG_subprogram | |
19461 | && child_pdi->linkage_name != NULL) | |
19462 | { | |
43816ebc | 19463 | gdb::unique_xmalloc_ptr<char> actual_class_name |
eff93b4d AB |
19464 | (cu->language_defn->class_name_from_physname |
19465 | (child_pdi->linkage_name)); | |
abc72ce4 DE |
19466 | if (actual_class_name != NULL) |
19467 | { | |
5e22e966 | 19468 | struct objfile *objfile = cu->per_objfile->objfile; |
7d00ffec TT |
19469 | struct_pdi->raw_name = objfile->intern (actual_class_name.get ()); |
19470 | struct_pdi->canonical_name = 1; | |
abc72ce4 DE |
19471 | } |
19472 | break; | |
19473 | } | |
19474 | } | |
19475 | } | |
19476 | ||
25c11aca TV |
19477 | /* Return true if a DIE with TAG may have the DW_AT_const_value |
19478 | attribute. */ | |
19479 | ||
19480 | static bool | |
19481 | can_have_DW_AT_const_value_p (enum dwarf_tag tag) | |
19482 | { | |
19483 | switch (tag) | |
19484 | { | |
19485 | case DW_TAG_constant: | |
19486 | case DW_TAG_enumerator: | |
19487 | case DW_TAG_formal_parameter: | |
19488 | case DW_TAG_template_value_param: | |
19489 | case DW_TAG_variable: | |
19490 | return true; | |
19491 | } | |
19492 | ||
19493 | return false; | |
19494 | } | |
19495 | ||
52356b79 YQ |
19496 | void |
19497 | partial_die_info::fixup (struct dwarf2_cu *cu) | |
72bf9492 | 19498 | { |
abc72ce4 DE |
19499 | /* Once we've fixed up a die, there's no point in doing so again. |
19500 | This also avoids a memory leak if we were to call | |
19501 | guess_partial_die_structure_name multiple times. */ | |
52356b79 | 19502 | if (fixup_called) |
abc72ce4 DE |
19503 | return; |
19504 | ||
72bf9492 DJ |
19505 | /* If we found a reference attribute and the DIE has no name, try |
19506 | to find a name in the referred to DIE. */ | |
19507 | ||
7d00ffec | 19508 | if (raw_name == NULL && has_specification) |
72bf9492 DJ |
19509 | { |
19510 | struct partial_die_info *spec_die; | |
72bf9492 | 19511 | |
122cf0f2 | 19512 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); |
fb816e8b TV |
19513 | spec_die = res.pdi; |
19514 | cu = res.cu; | |
72bf9492 | 19515 | |
52356b79 | 19516 | spec_die->fixup (cu); |
72bf9492 | 19517 | |
7d00ffec | 19518 | if (spec_die->raw_name) |
72bf9492 | 19519 | { |
7d00ffec TT |
19520 | raw_name = spec_die->raw_name; |
19521 | canonical_name = spec_die->canonical_name; | |
72bf9492 DJ |
19522 | |
19523 | /* Copy DW_AT_external attribute if it is set. */ | |
19524 | if (spec_die->is_external) | |
52356b79 | 19525 | is_external = spec_die->is_external; |
72bf9492 DJ |
19526 | } |
19527 | } | |
19528 | ||
25c11aca TV |
19529 | if (!has_const_value && has_specification |
19530 | && can_have_DW_AT_const_value_p (tag)) | |
19531 | { | |
19532 | struct partial_die_info *spec_die; | |
19533 | ||
19534 | auto res = find_partial_die (spec_offset, spec_is_dwz, cu); | |
19535 | spec_die = res.pdi; | |
19536 | cu = res.cu; | |
19537 | ||
19538 | spec_die->fixup (cu); | |
19539 | ||
19540 | if (spec_die->has_const_value) | |
19541 | { | |
19542 | /* Copy DW_AT_const_value attribute if it is set. */ | |
19543 | has_const_value = spec_die->has_const_value; | |
19544 | } | |
19545 | } | |
19546 | ||
72bf9492 | 19547 | /* Set default names for some unnamed DIEs. */ |
72bf9492 | 19548 | |
7d00ffec TT |
19549 | if (raw_name == NULL && tag == DW_TAG_namespace) |
19550 | { | |
19551 | raw_name = CP_ANONYMOUS_NAMESPACE_STR; | |
19552 | canonical_name = 1; | |
19553 | } | |
72bf9492 | 19554 | |
abc72ce4 DE |
19555 | /* If there is no parent die to provide a namespace, and there are |
19556 | children, see if we can determine the namespace from their linkage | |
122d1940 | 19557 | name. */ |
abc72ce4 | 19558 | if (cu->language == language_cplus |
5e22e966 | 19559 | && !cu->per_objfile->per_bfd->types.empty () |
52356b79 YQ |
19560 | && die_parent == NULL |
19561 | && has_children | |
19562 | && (tag == DW_TAG_class_type | |
19563 | || tag == DW_TAG_structure_type | |
19564 | || tag == DW_TAG_union_type)) | |
19565 | guess_partial_die_structure_name (this, cu); | |
abc72ce4 | 19566 | |
53832f31 TT |
19567 | /* GCC might emit a nameless struct or union that has a linkage |
19568 | name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
7d00ffec | 19569 | if (raw_name == NULL |
52356b79 YQ |
19570 | && (tag == DW_TAG_class_type |
19571 | || tag == DW_TAG_interface_type | |
19572 | || tag == DW_TAG_structure_type | |
19573 | || tag == DW_TAG_union_type) | |
19574 | && linkage_name != NULL) | |
53832f31 | 19575 | { |
43816ebc TT |
19576 | gdb::unique_xmalloc_ptr<char> demangled |
19577 | (gdb_demangle (linkage_name, DMGL_TYPES)); | |
19578 | if (demangled != nullptr) | |
53832f31 | 19579 | { |
96408a79 SA |
19580 | const char *base; |
19581 | ||
19582 | /* Strip any leading namespaces/classes, keep only the base name. | |
19583 | DW_AT_name for named DIEs does not contain the prefixes. */ | |
43816ebc TT |
19584 | base = strrchr (demangled.get (), ':'); |
19585 | if (base && base > demangled.get () && base[-1] == ':') | |
96408a79 SA |
19586 | base++; |
19587 | else | |
43816ebc | 19588 | base = demangled.get (); |
96408a79 | 19589 | |
5e22e966 | 19590 | struct objfile *objfile = cu->per_objfile->objfile; |
7d00ffec TT |
19591 | raw_name = objfile->intern (base); |
19592 | canonical_name = 1; | |
53832f31 TT |
19593 | } |
19594 | } | |
19595 | ||
52356b79 | 19596 | fixup_called = 1; |
72bf9492 DJ |
19597 | } |
19598 | ||
d0ce17d8 | 19599 | /* Read the .debug_loclists or .debug_rnglists header (they are the same format) |
a1c40103 SM |
19600 | contents from the given SECTION in the HEADER. |
19601 | ||
19602 | HEADER_OFFSET is the offset of the header in the section. */ | |
41144253 | 19603 | static void |
d0ce17d8 | 19604 | read_loclists_rnglists_header (struct loclists_rnglists_header *header, |
a1c40103 SM |
19605 | struct dwarf2_section_info *section, |
19606 | sect_offset header_offset) | |
41144253 | 19607 | { |
19608 | unsigned int bytes_read; | |
19609 | bfd *abfd = section->get_bfd_owner (); | |
a1c40103 SM |
19610 | const gdb_byte *info_ptr = section->buffer + to_underlying (header_offset); |
19611 | ||
41144253 | 19612 | header->length = read_initial_length (abfd, info_ptr, &bytes_read); |
19613 | info_ptr += bytes_read; | |
a1c40103 | 19614 | |
41144253 | 19615 | header->version = read_2_bytes (abfd, info_ptr); |
19616 | info_ptr += 2; | |
a1c40103 | 19617 | |
41144253 | 19618 | header->addr_size = read_1_byte (abfd, info_ptr); |
19619 | info_ptr += 1; | |
a1c40103 | 19620 | |
41144253 | 19621 | header->segment_collector_size = read_1_byte (abfd, info_ptr); |
19622 | info_ptr += 1; | |
a1c40103 | 19623 | |
41144253 | 19624 | header->offset_entry_count = read_4_bytes (abfd, info_ptr); |
19625 | } | |
19626 | ||
19627 | /* Return the DW_AT_loclists_base value for the CU. */ | |
19628 | static ULONGEST | |
19629 | lookup_loclist_base (struct dwarf2_cu *cu) | |
19630 | { | |
19631 | /* For the .dwo unit, the loclist_base points to the first offset following | |
19632 | the header. The header consists of the following entities- | |
19633 | 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64 | |
19634 | bit format) | |
19635 | 2. version (2 bytes) | |
19636 | 3. address size (1 byte) | |
19637 | 4. segment selector size (1 byte) | |
19638 | 5. offset entry count (4 bytes) | |
19639 | These sizes are derived as per the DWARFv5 standard. */ | |
19640 | if (cu->dwo_unit != nullptr) | |
19641 | { | |
19642 | if (cu->header.initial_length_size == 4) | |
19643 | return LOCLIST_HEADER_SIZE32; | |
19644 | return LOCLIST_HEADER_SIZE64; | |
19645 | } | |
19646 | return cu->loclist_base; | |
19647 | } | |
19648 | ||
19649 | /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the | |
19650 | array of offsets in the .debug_loclists section. */ | |
e57933dc SM |
19651 | |
19652 | static sect_offset | |
41144253 | 19653 | read_loclist_index (struct dwarf2_cu *cu, ULONGEST loclist_index) |
19654 | { | |
976ca316 SM |
19655 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
19656 | struct objfile *objfile = per_objfile->objfile; | |
41144253 | 19657 | bfd *abfd = objfile->obfd; |
a1c40103 SM |
19658 | ULONGEST loclist_header_size = |
19659 | (cu->header.initial_length_size == 4 ? LOCLIST_HEADER_SIZE32 | |
19660 | : LOCLIST_HEADER_SIZE64); | |
41144253 | 19661 | ULONGEST loclist_base = lookup_loclist_base (cu); |
05787bad SM |
19662 | |
19663 | /* Offset in .debug_loclists of the offset for LOCLIST_INDEX. */ | |
19664 | ULONGEST start_offset = | |
19665 | loclist_base + loclist_index * cu->header.offset_size; | |
19666 | ||
a1c40103 | 19667 | /* Get loclists section. */ |
41144253 | 19668 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
19669 | ||
a1c40103 | 19670 | /* Read the loclists section content. */ |
41144253 | 19671 | section->read (objfile); |
19672 | if (section->buffer == NULL) | |
a0c1eeba SM |
19673 | error (_("DW_FORM_loclistx used without .debug_loclists " |
19674 | "section [in module %s]"), objfile_name (objfile)); | |
19675 | ||
a1c40103 SM |
19676 | /* DW_AT_loclists_base points after the .debug_loclists contribution header, |
19677 | so if loclist_base is smaller than the header size, we have a problem. */ | |
19678 | if (loclist_base < loclist_header_size) | |
19679 | error (_("DW_AT_loclists_base is smaller than header size [in module %s]"), | |
19680 | objfile_name (objfile)); | |
19681 | ||
19682 | /* Read the header of the loclists contribution. */ | |
d0ce17d8 | 19683 | struct loclists_rnglists_header header; |
a1c40103 SM |
19684 | read_loclists_rnglists_header (&header, section, |
19685 | (sect_offset) (loclist_base - loclist_header_size)); | |
19686 | ||
19687 | /* Verify the loclist index is valid. */ | |
41144253 | 19688 | if (loclist_index >= header.offset_entry_count) |
a0c1eeba SM |
19689 | error (_("DW_FORM_loclistx pointing outside of " |
19690 | ".debug_loclists offset array [in module %s]"), | |
19691 | objfile_name (objfile)); | |
19692 | ||
05787bad SM |
19693 | /* Validate that reading won't go beyond the end of the section. */ |
19694 | if (start_offset + cu->header.offset_size > section->size) | |
19695 | error (_("Reading DW_FORM_loclistx index beyond end of" | |
19696 | ".debug_loclists section [in module %s]"), | |
19697 | objfile_name (objfile)); | |
19698 | ||
19699 | const gdb_byte *info_ptr = section->buffer + start_offset; | |
41144253 | 19700 | |
19701 | if (cu->header.offset_size == 4) | |
e57933dc | 19702 | return (sect_offset) (bfd_get_32 (abfd, info_ptr) + loclist_base); |
41144253 | 19703 | else |
e57933dc | 19704 | return (sect_offset) (bfd_get_64 (abfd, info_ptr) + loclist_base); |
41144253 | 19705 | } |
19706 | ||
d0ce17d8 CT |
19707 | /* Given a DW_FORM_rnglistx value RNGLIST_INDEX, fetch the offset from the |
19708 | array of offsets in the .debug_rnglists section. */ | |
e57933dc SM |
19709 | |
19710 | static sect_offset | |
d0ce17d8 CT |
19711 | read_rnglist_index (struct dwarf2_cu *cu, ULONGEST rnglist_index, |
19712 | dwarf_tag tag) | |
19713 | { | |
19714 | struct dwarf2_per_objfile *dwarf2_per_objfile = cu->per_objfile; | |
19715 | struct objfile *objfile = dwarf2_per_objfile->objfile; | |
19716 | bfd *abfd = objfile->obfd; | |
19717 | ULONGEST rnglist_header_size = | |
19718 | (cu->header.initial_length_size == 4 ? RNGLIST_HEADER_SIZE32 | |
19719 | : RNGLIST_HEADER_SIZE64); | |
2b0c7f41 SM |
19720 | |
19721 | /* When reading a DW_FORM_rnglistx from a DWO, we read from the DWO's | |
19722 | .debug_rnglists.dwo section. The rnglists base given in the skeleton | |
19723 | doesn't apply. */ | |
d0ce17d8 | 19724 | ULONGEST rnglist_base = |
2b0c7f41 | 19725 | (cu->dwo_unit != nullptr) ? rnglist_header_size : cu->rnglists_base; |
5e4d9bbc SM |
19726 | |
19727 | /* Offset in .debug_rnglists of the offset for RNGLIST_INDEX. */ | |
d0ce17d8 CT |
19728 | ULONGEST start_offset = |
19729 | rnglist_base + rnglist_index * cu->header.offset_size; | |
19730 | ||
19731 | /* Get rnglists section. */ | |
19732 | struct dwarf2_section_info *section = cu_debug_rnglists_section (cu, tag); | |
19733 | ||
19734 | /* Read the rnglists section content. */ | |
19735 | section->read (objfile); | |
19736 | if (section->buffer == nullptr) | |
19737 | error (_("DW_FORM_rnglistx used without .debug_rnglists section " | |
19738 | "[in module %s]"), | |
19739 | objfile_name (objfile)); | |
19740 | ||
a1c40103 SM |
19741 | /* DW_AT_rnglists_base points after the .debug_rnglists contribution header, |
19742 | so if rnglist_base is smaller than the header size, we have a problem. */ | |
19743 | if (rnglist_base < rnglist_header_size) | |
19744 | error (_("DW_AT_rnglists_base is smaller than header size [in module %s]"), | |
19745 | objfile_name (objfile)); | |
19746 | ||
19747 | /* Read the header of the rnglists contribution. */ | |
d0ce17d8 | 19748 | struct loclists_rnglists_header header; |
a1c40103 SM |
19749 | read_loclists_rnglists_header (&header, section, |
19750 | (sect_offset) (rnglist_base - rnglist_header_size)); | |
19751 | ||
19752 | /* Verify the rnglist index is valid. */ | |
d0ce17d8 CT |
19753 | if (rnglist_index >= header.offset_entry_count) |
19754 | error (_("DW_FORM_rnglistx index pointing outside of " | |
19755 | ".debug_rnglists offset array [in module %s]"), | |
19756 | objfile_name (objfile)); | |
19757 | ||
d0ce17d8 | 19758 | /* Validate that reading won't go beyond the end of the section. */ |
5e4d9bbc | 19759 | if (start_offset + cu->header.offset_size > section->size) |
d0ce17d8 CT |
19760 | error (_("Reading DW_FORM_rnglistx index beyond end of" |
19761 | ".debug_rnglists section [in module %s]"), | |
19762 | objfile_name (objfile)); | |
19763 | ||
19764 | const gdb_byte *info_ptr = section->buffer + start_offset; | |
19765 | ||
19766 | if (cu->header.offset_size == 4) | |
e57933dc | 19767 | return (sect_offset) (read_4_bytes (abfd, info_ptr) + rnglist_base); |
d0ce17d8 | 19768 | else |
e57933dc | 19769 | return (sect_offset) (read_8_bytes (abfd, info_ptr) + rnglist_base); |
d0ce17d8 CT |
19770 | } |
19771 | ||
18a8505e AT |
19772 | /* Process the attributes that had to be skipped in the first round. These |
19773 | attributes are the ones that need str_offsets_base or addr_base attributes. | |
19774 | They could not have been processed in the first round, because at the time | |
19775 | the values of str_offsets_base or addr_base may not have been known. */ | |
f1749218 TT |
19776 | static void |
19777 | read_attribute_reprocess (const struct die_reader_specs *reader, | |
d0ce17d8 | 19778 | struct attribute *attr, dwarf_tag tag) |
18a8505e AT |
19779 | { |
19780 | struct dwarf2_cu *cu = reader->cu; | |
19781 | switch (attr->form) | |
19782 | { | |
19783 | case DW_FORM_addrx: | |
19784 | case DW_FORM_GNU_addr_index: | |
36d378cf TT |
19785 | attr->set_address (read_addr_index (cu, |
19786 | attr->as_unsigned_reprocess ())); | |
dda83cd7 | 19787 | break; |
41144253 | 19788 | case DW_FORM_loclistx: |
b1829e1b | 19789 | { |
e57933dc | 19790 | sect_offset loclists_sect_off |
b1829e1b SM |
19791 | = read_loclist_index (cu, attr->as_unsigned_reprocess ()); |
19792 | ||
e57933dc | 19793 | attr->set_unsigned (to_underlying (loclists_sect_off)); |
b1829e1b SM |
19794 | } |
19795 | break; | |
d0ce17d8 | 19796 | case DW_FORM_rnglistx: |
b1829e1b | 19797 | { |
e57933dc | 19798 | sect_offset rnglists_sect_off |
b1829e1b SM |
19799 | = read_rnglist_index (cu, attr->as_unsigned_reprocess (), tag); |
19800 | ||
e57933dc | 19801 | attr->set_unsigned (to_underlying (rnglists_sect_off)); |
b1829e1b | 19802 | } |
dda83cd7 | 19803 | break; |
18a8505e AT |
19804 | case DW_FORM_strx: |
19805 | case DW_FORM_strx1: | |
19806 | case DW_FORM_strx2: | |
19807 | case DW_FORM_strx3: | |
19808 | case DW_FORM_strx4: | |
19809 | case DW_FORM_GNU_str_index: | |
19810 | { | |
fe56917a | 19811 | unsigned int str_index = attr->as_unsigned_reprocess (); |
c6481205 | 19812 | gdb_assert (!attr->canonical_string_p ()); |
18a8505e | 19813 | if (reader->dwo_file != NULL) |
c6481205 TT |
19814 | attr->set_string_noncanonical (read_dwo_str_index (reader, |
19815 | str_index)); | |
18a8505e | 19816 | else |
c6481205 TT |
19817 | attr->set_string_noncanonical (read_stub_str_index (cu, |
19818 | str_index)); | |
18a8505e AT |
19819 | break; |
19820 | } | |
19821 | default: | |
19822 | gdb_assert_not_reached (_("Unexpected DWARF form.")); | |
19823 | } | |
19824 | } | |
19825 | ||
a8329558 | 19826 | /* Read an attribute value described by an attribute form. */ |
c906108c | 19827 | |
d521ce57 | 19828 | static const gdb_byte * |
dee91e82 DE |
19829 | read_attribute_value (const struct die_reader_specs *reader, |
19830 | struct attribute *attr, unsigned form, | |
7a5f294d | 19831 | LONGEST implicit_const, const gdb_byte *info_ptr) |
c906108c | 19832 | { |
dee91e82 | 19833 | struct dwarf2_cu *cu = reader->cu; |
976ca316 SM |
19834 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
19835 | struct objfile *objfile = per_objfile->objfile; | |
dee91e82 | 19836 | bfd *abfd = reader->abfd; |
e7c27a73 | 19837 | struct comp_unit_head *cu_header = &cu->header; |
c906108c SS |
19838 | unsigned int bytes_read; |
19839 | struct dwarf_block *blk; | |
19840 | ||
aead7601 | 19841 | attr->form = (enum dwarf_form) form; |
a8329558 | 19842 | switch (form) |
c906108c | 19843 | { |
c906108c | 19844 | case DW_FORM_ref_addr: |
7c290a04 TT |
19845 | if (cu_header->version == 2) |
19846 | attr->set_unsigned (cu_header->read_address (abfd, info_ptr, | |
414ad644 | 19847 | &bytes_read)); |
ae411497 | 19848 | else |
7c290a04 | 19849 | attr->set_unsigned (cu_header->read_offset (abfd, info_ptr, |
414ad644 | 19850 | &bytes_read)); |
ae411497 TT |
19851 | info_ptr += bytes_read; |
19852 | break; | |
36586728 | 19853 | case DW_FORM_GNU_ref_alt: |
7c290a04 | 19854 | attr->set_unsigned (cu_header->read_offset (abfd, info_ptr, |
414ad644 | 19855 | &bytes_read)); |
36586728 TT |
19856 | info_ptr += bytes_read; |
19857 | break; | |
ae411497 | 19858 | case DW_FORM_addr: |
08feed99 TT |
19859 | { |
19860 | struct gdbarch *gdbarch = objfile->arch (); | |
7c290a04 | 19861 | CORE_ADDR addr = cu_header->read_address (abfd, info_ptr, &bytes_read); |
36d378cf TT |
19862 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr); |
19863 | attr->set_address (addr); | |
08feed99 TT |
19864 | info_ptr += bytes_read; |
19865 | } | |
c906108c SS |
19866 | break; |
19867 | case DW_FORM_block2: | |
7b5a2f43 | 19868 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19869 | blk->size = read_2_bytes (abfd, info_ptr); |
19870 | info_ptr += 2; | |
19871 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19872 | info_ptr += blk->size; | |
9d2246fc | 19873 | attr->set_block (blk); |
c906108c SS |
19874 | break; |
19875 | case DW_FORM_block4: | |
7b5a2f43 | 19876 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19877 | blk->size = read_4_bytes (abfd, info_ptr); |
19878 | info_ptr += 4; | |
19879 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19880 | info_ptr += blk->size; | |
9d2246fc | 19881 | attr->set_block (blk); |
c906108c SS |
19882 | break; |
19883 | case DW_FORM_data2: | |
414ad644 | 19884 | attr->set_unsigned (read_2_bytes (abfd, info_ptr)); |
c906108c SS |
19885 | info_ptr += 2; |
19886 | break; | |
19887 | case DW_FORM_data4: | |
414ad644 | 19888 | attr->set_unsigned (read_4_bytes (abfd, info_ptr)); |
c906108c SS |
19889 | info_ptr += 4; |
19890 | break; | |
19891 | case DW_FORM_data8: | |
414ad644 | 19892 | attr->set_unsigned (read_8_bytes (abfd, info_ptr)); |
c906108c SS |
19893 | info_ptr += 8; |
19894 | break; | |
0224619f JK |
19895 | case DW_FORM_data16: |
19896 | blk = dwarf_alloc_block (cu); | |
19897 | blk->size = 16; | |
19898 | blk->data = read_n_bytes (abfd, info_ptr, 16); | |
19899 | info_ptr += 16; | |
9d2246fc | 19900 | attr->set_block (blk); |
0224619f | 19901 | break; |
2dc7f7b3 | 19902 | case DW_FORM_sec_offset: |
7c290a04 | 19903 | attr->set_unsigned (cu_header->read_offset (abfd, info_ptr, |
414ad644 | 19904 | &bytes_read)); |
2dc7f7b3 TT |
19905 | info_ptr += bytes_read; |
19906 | break; | |
41144253 | 19907 | case DW_FORM_loclistx: |
19908 | { | |
7a5f294d TT |
19909 | attr->set_unsigned_reprocess (read_unsigned_leb128 (abfd, info_ptr, |
19910 | &bytes_read)); | |
19911 | info_ptr += bytes_read; | |
41144253 | 19912 | } |
19913 | break; | |
c906108c | 19914 | case DW_FORM_string: |
c6481205 TT |
19915 | attr->set_string_noncanonical (read_direct_string (abfd, info_ptr, |
19916 | &bytes_read)); | |
c906108c SS |
19917 | info_ptr += bytes_read; |
19918 | break; | |
4bdf3d34 | 19919 | case DW_FORM_strp: |
36586728 TT |
19920 | if (!cu->per_cu->is_dwz) |
19921 | { | |
c6481205 TT |
19922 | attr->set_string_noncanonical |
19923 | (read_indirect_string (per_objfile, | |
19924 | abfd, info_ptr, cu_header, | |
19925 | &bytes_read)); | |
36586728 TT |
19926 | info_ptr += bytes_read; |
19927 | break; | |
19928 | } | |
19929 | /* FALLTHROUGH */ | |
43988095 JK |
19930 | case DW_FORM_line_strp: |
19931 | if (!cu->per_cu->is_dwz) | |
19932 | { | |
c6481205 TT |
19933 | attr->set_string_noncanonical |
19934 | (per_objfile->read_line_string (info_ptr, cu_header, | |
19935 | &bytes_read)); | |
43988095 JK |
19936 | info_ptr += bytes_read; |
19937 | break; | |
19938 | } | |
19939 | /* FALLTHROUGH */ | |
36586728 TT |
19940 | case DW_FORM_GNU_strp_alt: |
19941 | { | |
a7308ce0 | 19942 | dwz_file *dwz = dwarf2_get_dwz_file (per_objfile->per_bfd, true); |
8266302d TT |
19943 | LONGEST str_offset = cu_header->read_offset (abfd, info_ptr, |
19944 | &bytes_read); | |
36586728 | 19945 | |
c6481205 TT |
19946 | attr->set_string_noncanonical |
19947 | (dwz->read_string (objfile, str_offset)); | |
36586728 TT |
19948 | info_ptr += bytes_read; |
19949 | } | |
4bdf3d34 | 19950 | break; |
2dc7f7b3 | 19951 | case DW_FORM_exprloc: |
c906108c | 19952 | case DW_FORM_block: |
7b5a2f43 | 19953 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19954 | blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
19955 | info_ptr += bytes_read; | |
19956 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19957 | info_ptr += blk->size; | |
9d2246fc | 19958 | attr->set_block (blk); |
c906108c SS |
19959 | break; |
19960 | case DW_FORM_block1: | |
7b5a2f43 | 19961 | blk = dwarf_alloc_block (cu); |
c906108c SS |
19962 | blk->size = read_1_byte (abfd, info_ptr); |
19963 | info_ptr += 1; | |
19964 | blk->data = read_n_bytes (abfd, info_ptr, blk->size); | |
19965 | info_ptr += blk->size; | |
9d2246fc | 19966 | attr->set_block (blk); |
c906108c SS |
19967 | break; |
19968 | case DW_FORM_data1: | |
c906108c | 19969 | case DW_FORM_flag: |
414ad644 | 19970 | attr->set_unsigned (read_1_byte (abfd, info_ptr)); |
c906108c SS |
19971 | info_ptr += 1; |
19972 | break; | |
2dc7f7b3 | 19973 | case DW_FORM_flag_present: |
414ad644 | 19974 | attr->set_unsigned (1); |
2dc7f7b3 | 19975 | break; |
c906108c | 19976 | case DW_FORM_sdata: |
1bc397c5 | 19977 | attr->set_signed (read_signed_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19978 | info_ptr += bytes_read; |
19979 | break; | |
18a8505e | 19980 | case DW_FORM_rnglistx: |
7a5f294d TT |
19981 | { |
19982 | attr->set_unsigned_reprocess (read_unsigned_leb128 (abfd, info_ptr, | |
19983 | &bytes_read)); | |
19984 | info_ptr += bytes_read; | |
19985 | } | |
19986 | break; | |
d0ce17d8 | 19987 | case DW_FORM_udata: |
414ad644 | 19988 | attr->set_unsigned (read_unsigned_leb128 (abfd, info_ptr, &bytes_read)); |
c906108c SS |
19989 | info_ptr += bytes_read; |
19990 | break; | |
19991 | case DW_FORM_ref1: | |
7c290a04 | 19992 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 19993 | + read_1_byte (abfd, info_ptr))); |
c906108c SS |
19994 | info_ptr += 1; |
19995 | break; | |
19996 | case DW_FORM_ref2: | |
7c290a04 | 19997 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 19998 | + read_2_bytes (abfd, info_ptr))); |
c906108c SS |
19999 | info_ptr += 2; |
20000 | break; | |
20001 | case DW_FORM_ref4: | |
7c290a04 | 20002 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 20003 | + read_4_bytes (abfd, info_ptr))); |
c906108c SS |
20004 | info_ptr += 4; |
20005 | break; | |
613e1657 | 20006 | case DW_FORM_ref8: |
7c290a04 | 20007 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 | 20008 | + read_8_bytes (abfd, info_ptr))); |
613e1657 KB |
20009 | info_ptr += 8; |
20010 | break; | |
55f1336d | 20011 | case DW_FORM_ref_sig8: |
630ed6b9 | 20012 | attr->set_signature (read_8_bytes (abfd, info_ptr)); |
348e048f DE |
20013 | info_ptr += 8; |
20014 | break; | |
c906108c | 20015 | case DW_FORM_ref_udata: |
7c290a04 | 20016 | attr->set_unsigned ((to_underlying (cu_header->sect_off) |
414ad644 TT |
20017 | + read_unsigned_leb128 (abfd, info_ptr, |
20018 | &bytes_read))); | |
c906108c SS |
20019 | info_ptr += bytes_read; |
20020 | break; | |
c906108c | 20021 | case DW_FORM_indirect: |
a8329558 KW |
20022 | form = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); |
20023 | info_ptr += bytes_read; | |
43988095 JK |
20024 | if (form == DW_FORM_implicit_const) |
20025 | { | |
20026 | implicit_const = read_signed_leb128 (abfd, info_ptr, &bytes_read); | |
20027 | info_ptr += bytes_read; | |
20028 | } | |
20029 | info_ptr = read_attribute_value (reader, attr, form, implicit_const, | |
7a5f294d | 20030 | info_ptr); |
43988095 JK |
20031 | break; |
20032 | case DW_FORM_implicit_const: | |
1bc397c5 | 20033 | attr->set_signed (implicit_const); |
a8329558 | 20034 | break; |
336d760d | 20035 | case DW_FORM_addrx: |
3019eac3 | 20036 | case DW_FORM_GNU_addr_index: |
fe56917a TT |
20037 | attr->set_unsigned_reprocess (read_unsigned_leb128 (abfd, info_ptr, |
20038 | &bytes_read)); | |
3019eac3 DE |
20039 | info_ptr += bytes_read; |
20040 | break; | |
cf532bd1 | 20041 | case DW_FORM_strx: |
15f18d14 AT |
20042 | case DW_FORM_strx1: |
20043 | case DW_FORM_strx2: | |
20044 | case DW_FORM_strx3: | |
20045 | case DW_FORM_strx4: | |
3019eac3 | 20046 | case DW_FORM_GNU_str_index: |
3019eac3 | 20047 | { |
15f18d14 AT |
20048 | ULONGEST str_index; |
20049 | if (form == DW_FORM_strx1) | |
20050 | { | |
20051 | str_index = read_1_byte (abfd, info_ptr); | |
20052 | info_ptr += 1; | |
20053 | } | |
20054 | else if (form == DW_FORM_strx2) | |
20055 | { | |
20056 | str_index = read_2_bytes (abfd, info_ptr); | |
20057 | info_ptr += 2; | |
20058 | } | |
20059 | else if (form == DW_FORM_strx3) | |
20060 | { | |
20061 | str_index = read_3_bytes (abfd, info_ptr); | |
20062 | info_ptr += 3; | |
20063 | } | |
20064 | else if (form == DW_FORM_strx4) | |
20065 | { | |
20066 | str_index = read_4_bytes (abfd, info_ptr); | |
20067 | info_ptr += 4; | |
20068 | } | |
20069 | else | |
20070 | { | |
20071 | str_index = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); | |
20072 | info_ptr += bytes_read; | |
20073 | } | |
fe56917a | 20074 | attr->set_unsigned_reprocess (str_index); |
7a5f294d | 20075 | } |
3019eac3 | 20076 | break; |
c906108c | 20077 | default: |
8a3fe4f8 | 20078 | error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"), |
659b0389 ML |
20079 | dwarf_form_name (form), |
20080 | bfd_get_filename (abfd)); | |
c906108c | 20081 | } |
28e94949 | 20082 | |
36586728 | 20083 | /* Super hack. */ |
cd6c91b4 | 20084 | if (cu->per_cu->is_dwz && attr->form_is_ref ()) |
36586728 TT |
20085 | attr->form = DW_FORM_GNU_ref_alt; |
20086 | ||
28e94949 JB |
20087 | /* We have seen instances where the compiler tried to emit a byte |
20088 | size attribute of -1 which ended up being encoded as an unsigned | |
20089 | 0xffffffff. Although 0xffffffff is technically a valid size value, | |
20090 | an object of this size seems pretty unlikely so we can relatively | |
20091 | safely treat these cases as if the size attribute was invalid and | |
20092 | treat them as zero by default. */ | |
20093 | if (attr->name == DW_AT_byte_size | |
20094 | && form == DW_FORM_data4 | |
529908cb | 20095 | && attr->as_unsigned () >= 0xffffffff) |
01c66ae6 JB |
20096 | { |
20097 | complaint | |
dda83cd7 SM |
20098 | (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"), |
20099 | hex_string (attr->as_unsigned ())); | |
414ad644 | 20100 | attr->set_unsigned (0); |
01c66ae6 | 20101 | } |
28e94949 | 20102 | |
c906108c SS |
20103 | return info_ptr; |
20104 | } | |
20105 | ||
a8329558 KW |
20106 | /* Read an attribute described by an abbreviated attribute. */ |
20107 | ||
d521ce57 | 20108 | static const gdb_byte * |
dee91e82 | 20109 | read_attribute (const struct die_reader_specs *reader, |
4444f407 | 20110 | struct attribute *attr, const struct attr_abbrev *abbrev, |
7a5f294d | 20111 | const gdb_byte *info_ptr) |
a8329558 KW |
20112 | { |
20113 | attr->name = abbrev->name; | |
c6481205 | 20114 | attr->string_is_canonical = 0; |
fe56917a | 20115 | attr->requires_reprocessing = 0; |
43988095 | 20116 | return read_attribute_value (reader, attr, abbrev->form, |
7a5f294d | 20117 | abbrev->implicit_const, info_ptr); |
a8329558 KW |
20118 | } |
20119 | ||
43988095 JK |
20120 | /* Return pointer to string at .debug_str offset STR_OFFSET. */ |
20121 | ||
20122 | static const char * | |
976ca316 | 20123 | read_indirect_string_at_offset (dwarf2_per_objfile *per_objfile, |
4f44ae6c | 20124 | LONGEST str_offset) |
43988095 | 20125 | { |
976ca316 SM |
20126 | return per_objfile->per_bfd->str.read_string (per_objfile->objfile, |
20127 | str_offset, "DW_FORM_strp"); | |
c906108c SS |
20128 | } |
20129 | ||
43988095 JK |
20130 | /* Return pointer to string at .debug_str offset as read from BUF. |
20131 | BUF is assumed to be in a compilation unit described by CU_HEADER. | |
20132 | Return *BYTES_READ_PTR count of bytes read from BUF. */ | |
20133 | ||
d521ce57 | 20134 | static const char * |
976ca316 | 20135 | read_indirect_string (dwarf2_per_objfile *per_objfile, bfd *abfd, |
ed2dc618 | 20136 | const gdb_byte *buf, |
cf2c3c16 TT |
20137 | const struct comp_unit_head *cu_header, |
20138 | unsigned int *bytes_read_ptr) | |
20139 | { | |
8266302d | 20140 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
cf2c3c16 | 20141 | |
976ca316 | 20142 | return read_indirect_string_at_offset (per_objfile, str_offset); |
cf2c3c16 TT |
20143 | } |
20144 | ||
86c0bb4c | 20145 | /* See read.h. */ |
43988095 | 20146 | |
86c0bb4c TT |
20147 | const char * |
20148 | dwarf2_per_objfile::read_line_string (const gdb_byte *buf, | |
5989a64e SM |
20149 | const struct comp_unit_head *cu_header, |
20150 | unsigned int *bytes_read_ptr) | |
43988095 | 20151 | { |
86c0bb4c | 20152 | bfd *abfd = objfile->obfd; |
8266302d | 20153 | LONGEST str_offset = cu_header->read_offset (abfd, buf, bytes_read_ptr); |
43988095 | 20154 | |
5989a64e | 20155 | return per_bfd->line_str.read_string (objfile, str_offset, "DW_FORM_line_strp"); |
43988095 JK |
20156 | } |
20157 | ||
3019eac3 | 20158 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. |
18a8505e | 20159 | ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero. |
3019eac3 DE |
20160 | ADDR_SIZE is the size of addresses from the CU header. */ |
20161 | ||
20162 | static CORE_ADDR | |
976ca316 SM |
20163 | read_addr_index_1 (dwarf2_per_objfile *per_objfile, unsigned int addr_index, |
20164 | gdb::optional<ULONGEST> addr_base, int addr_size) | |
3019eac3 | 20165 | { |
976ca316 | 20166 | struct objfile *objfile = per_objfile->objfile; |
3019eac3 DE |
20167 | bfd *abfd = objfile->obfd; |
20168 | const gdb_byte *info_ptr; | |
18a8505e | 20169 | ULONGEST addr_base_or_zero = addr_base.has_value () ? *addr_base : 0; |
3019eac3 | 20170 | |
976ca316 SM |
20171 | per_objfile->per_bfd->addr.read (objfile); |
20172 | if (per_objfile->per_bfd->addr.buffer == NULL) | |
3019eac3 | 20173 | error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"), |
4262abfb | 20174 | objfile_name (objfile)); |
18a8505e | 20175 | if (addr_base_or_zero + addr_index * addr_size |
976ca316 | 20176 | >= per_objfile->per_bfd->addr.size) |
3019eac3 DE |
20177 | error (_("DW_FORM_addr_index pointing outside of " |
20178 | ".debug_addr section [in module %s]"), | |
4262abfb | 20179 | objfile_name (objfile)); |
976ca316 SM |
20180 | info_ptr = (per_objfile->per_bfd->addr.buffer + addr_base_or_zero |
20181 | + addr_index * addr_size); | |
3019eac3 DE |
20182 | if (addr_size == 4) |
20183 | return bfd_get_32 (abfd, info_ptr); | |
20184 | else | |
20185 | return bfd_get_64 (abfd, info_ptr); | |
20186 | } | |
20187 | ||
20188 | /* Given index ADDR_INDEX in .debug_addr, fetch the value. */ | |
20189 | ||
20190 | static CORE_ADDR | |
20191 | read_addr_index (struct dwarf2_cu *cu, unsigned int addr_index) | |
20192 | { | |
5e22e966 | 20193 | return read_addr_index_1 (cu->per_objfile, addr_index, |
518817b3 | 20194 | cu->addr_base, cu->header.addr_size); |
3019eac3 DE |
20195 | } |
20196 | ||
20197 | /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */ | |
20198 | ||
20199 | static CORE_ADDR | |
d521ce57 | 20200 | read_addr_index_from_leb128 (struct dwarf2_cu *cu, const gdb_byte *info_ptr, |
3019eac3 DE |
20201 | unsigned int *bytes_read) |
20202 | { | |
5e22e966 | 20203 | bfd *abfd = cu->per_objfile->objfile->obfd; |
3019eac3 DE |
20204 | unsigned int addr_index = read_unsigned_leb128 (abfd, info_ptr, bytes_read); |
20205 | ||
20206 | return read_addr_index (cu, addr_index); | |
20207 | } | |
20208 | ||
450a1bfc | 20209 | /* See read.h. */ |
3019eac3 DE |
20210 | |
20211 | CORE_ADDR | |
82ca3f51 | 20212 | dwarf2_read_addr_index (dwarf2_per_cu_data *per_cu, |
976ca316 | 20213 | dwarf2_per_objfile *per_objfile, |
82ca3f51 | 20214 | unsigned int addr_index) |
3019eac3 | 20215 | { |
976ca316 | 20216 | struct dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
18a8505e | 20217 | gdb::optional<ULONGEST> addr_base; |
3019eac3 DE |
20218 | int addr_size; |
20219 | ||
3019eac3 DE |
20220 | /* We need addr_base and addr_size. |
20221 | If we don't have PER_CU->cu, we have to get it. | |
20222 | Nasty, but the alternative is storing the needed info in PER_CU, | |
20223 | which at this point doesn't seem justified: it's not clear how frequently | |
20224 | it would get used and it would increase the size of every PER_CU. | |
20225 | Entry points like dwarf2_per_cu_addr_size do a similar thing | |
20226 | so we're not in uncharted territory here. | |
20227 | Alas we need to be a bit more complicated as addr_base is contained | |
20228 | in the DIE. | |
20229 | ||
20230 | We don't need to read the entire CU(/TU). | |
20231 | We just need the header and top level die. | |
a1b64ce1 | 20232 | |
3019eac3 | 20233 | IWBN to use the aging mechanism to let us lazily later discard the CU. |
a1b64ce1 | 20234 | For now we skip this optimization. */ |
3019eac3 DE |
20235 | |
20236 | if (cu != NULL) | |
20237 | { | |
20238 | addr_base = cu->addr_base; | |
20239 | addr_size = cu->header.addr_size; | |
20240 | } | |
20241 | else | |
20242 | { | |
976ca316 | 20243 | cutu_reader reader (per_cu, per_objfile, nullptr, nullptr, false); |
c0ab21c2 TT |
20244 | addr_base = reader.cu->addr_base; |
20245 | addr_size = reader.cu->header.addr_size; | |
3019eac3 DE |
20246 | } |
20247 | ||
976ca316 | 20248 | return read_addr_index_1 (per_objfile, addr_index, addr_base, addr_size); |
3019eac3 DE |
20249 | } |
20250 | ||
18a8505e AT |
20251 | /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string. |
20252 | STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a | |
20253 | DWO file. */ | |
3019eac3 | 20254 | |
d521ce57 | 20255 | static const char * |
18a8505e AT |
20256 | read_str_index (struct dwarf2_cu *cu, |
20257 | struct dwarf2_section_info *str_section, | |
20258 | struct dwarf2_section_info *str_offsets_section, | |
20259 | ULONGEST str_offsets_base, ULONGEST str_index) | |
3019eac3 | 20260 | { |
976ca316 SM |
20261 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
20262 | struct objfile *objfile = per_objfile->objfile; | |
c5164cbc | 20263 | const char *objf_name = objfile_name (objfile); |
3019eac3 | 20264 | bfd *abfd = objfile->obfd; |
d521ce57 | 20265 | const gdb_byte *info_ptr; |
3019eac3 | 20266 | ULONGEST str_offset; |
cf532bd1 | 20267 | static const char form_name[] = "DW_FORM_GNU_str_index or DW_FORM_strx"; |
3019eac3 | 20268 | |
96b79293 TT |
20269 | str_section->read (objfile); |
20270 | str_offsets_section->read (objfile); | |
73869dc2 | 20271 | if (str_section->buffer == NULL) |
18a8505e | 20272 | error (_("%s used without %s section" |
9d8780f0 | 20273 | " in CU at offset %s [in module %s]"), |
96b79293 | 20274 | form_name, str_section->get_name (), |
dda83cd7 | 20275 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 20276 | if (str_offsets_section->buffer == NULL) |
18a8505e | 20277 | error (_("%s used without %s section" |
9d8780f0 | 20278 | " in CU at offset %s [in module %s]"), |
96b79293 | 20279 | form_name, str_section->get_name (), |
dda83cd7 | 20280 | sect_offset_str (cu->header.sect_off), objf_name); |
73869dc2 | 20281 | info_ptr = (str_offsets_section->buffer |
18a8505e | 20282 | + str_offsets_base |
3019eac3 DE |
20283 | + str_index * cu->header.offset_size); |
20284 | if (cu->header.offset_size == 4) | |
20285 | str_offset = bfd_get_32 (abfd, info_ptr); | |
20286 | else | |
20287 | str_offset = bfd_get_64 (abfd, info_ptr); | |
73869dc2 | 20288 | if (str_offset >= str_section->size) |
57d63ce2 | 20289 | error (_("Offset from %s pointing outside of" |
9d8780f0 SM |
20290 | " .debug_str.dwo section in CU at offset %s [in module %s]"), |
20291 | form_name, sect_offset_str (cu->header.sect_off), objf_name); | |
73869dc2 | 20292 | return (const char *) (str_section->buffer + str_offset); |
3019eac3 DE |
20293 | } |
20294 | ||
18a8505e AT |
20295 | /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */ |
20296 | ||
20297 | static const char * | |
20298 | read_dwo_str_index (const struct die_reader_specs *reader, ULONGEST str_index) | |
20299 | { | |
20300 | ULONGEST str_offsets_base = reader->cu->header.version >= 5 | |
20301 | ? reader->cu->header.addr_size : 0; | |
20302 | return read_str_index (reader->cu, | |
20303 | &reader->dwo_file->sections.str, | |
20304 | &reader->dwo_file->sections.str_offsets, | |
20305 | str_offsets_base, str_index); | |
20306 | } | |
20307 | ||
20308 | /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */ | |
20309 | ||
20310 | static const char * | |
20311 | read_stub_str_index (struct dwarf2_cu *cu, ULONGEST str_index) | |
20312 | { | |
5e22e966 | 20313 | struct objfile *objfile = cu->per_objfile->objfile; |
18a8505e AT |
20314 | const char *objf_name = objfile_name (objfile); |
20315 | static const char form_name[] = "DW_FORM_GNU_str_index"; | |
20316 | static const char str_offsets_attr_name[] = "DW_AT_str_offsets"; | |
20317 | ||
20318 | if (!cu->str_offsets_base.has_value ()) | |
20319 | error (_("%s used in Fission stub without %s" | |
20320 | " in CU at offset 0x%lx [in module %s]"), | |
20321 | form_name, str_offsets_attr_name, | |
20322 | (long) cu->header.offset_size, objf_name); | |
20323 | ||
20324 | return read_str_index (cu, | |
5e22e966 SM |
20325 | &cu->per_objfile->per_bfd->str, |
20326 | &cu->per_objfile->per_bfd->str_offsets, | |
18a8505e AT |
20327 | *cu->str_offsets_base, str_index); |
20328 | } | |
20329 | ||
3019eac3 DE |
20330 | /* Return the length of an LEB128 number in BUF. */ |
20331 | ||
20332 | static int | |
20333 | leb128_size (const gdb_byte *buf) | |
20334 | { | |
20335 | const gdb_byte *begin = buf; | |
20336 | gdb_byte byte; | |
20337 | ||
20338 | while (1) | |
20339 | { | |
20340 | byte = *buf++; | |
20341 | if ((byte & 128) == 0) | |
20342 | return buf - begin; | |
20343 | } | |
20344 | } | |
20345 | ||
c906108c | 20346 | static void |
e142c38c | 20347 | set_cu_language (unsigned int lang, struct dwarf2_cu *cu) |
c906108c SS |
20348 | { |
20349 | switch (lang) | |
20350 | { | |
20351 | case DW_LANG_C89: | |
76bee0cc | 20352 | case DW_LANG_C99: |
0cfd832f | 20353 | case DW_LANG_C11: |
c906108c | 20354 | case DW_LANG_C: |
d1be3247 | 20355 | case DW_LANG_UPC: |
e142c38c | 20356 | cu->language = language_c; |
c906108c | 20357 | break; |
9c37b5ae | 20358 | case DW_LANG_Java: |
c906108c | 20359 | case DW_LANG_C_plus_plus: |
0cfd832f MW |
20360 | case DW_LANG_C_plus_plus_11: |
20361 | case DW_LANG_C_plus_plus_14: | |
e142c38c | 20362 | cu->language = language_cplus; |
c906108c | 20363 | break; |
6aecb9c2 JB |
20364 | case DW_LANG_D: |
20365 | cu->language = language_d; | |
20366 | break; | |
c906108c SS |
20367 | case DW_LANG_Fortran77: |
20368 | case DW_LANG_Fortran90: | |
b21b22e0 | 20369 | case DW_LANG_Fortran95: |
f7de9aab MW |
20370 | case DW_LANG_Fortran03: |
20371 | case DW_LANG_Fortran08: | |
e142c38c | 20372 | cu->language = language_fortran; |
c906108c | 20373 | break; |
a766d390 DE |
20374 | case DW_LANG_Go: |
20375 | cu->language = language_go; | |
20376 | break; | |
c906108c | 20377 | case DW_LANG_Mips_Assembler: |
e142c38c | 20378 | cu->language = language_asm; |
c906108c SS |
20379 | break; |
20380 | case DW_LANG_Ada83: | |
8aaf0b47 | 20381 | case DW_LANG_Ada95: |
bc5f45f8 JB |
20382 | cu->language = language_ada; |
20383 | break; | |
72019c9c GM |
20384 | case DW_LANG_Modula2: |
20385 | cu->language = language_m2; | |
20386 | break; | |
fe8e67fd PM |
20387 | case DW_LANG_Pascal83: |
20388 | cu->language = language_pascal; | |
20389 | break; | |
22566fbd DJ |
20390 | case DW_LANG_ObjC: |
20391 | cu->language = language_objc; | |
20392 | break; | |
c44af4eb TT |
20393 | case DW_LANG_Rust: |
20394 | case DW_LANG_Rust_old: | |
20395 | cu->language = language_rust; | |
20396 | break; | |
c906108c SS |
20397 | case DW_LANG_Cobol74: |
20398 | case DW_LANG_Cobol85: | |
c906108c | 20399 | default: |
e142c38c | 20400 | cu->language = language_minimal; |
c906108c SS |
20401 | break; |
20402 | } | |
e142c38c | 20403 | cu->language_defn = language_def (cu->language); |
c906108c SS |
20404 | } |
20405 | ||
20406 | /* Return the named attribute or NULL if not there. */ | |
20407 | ||
20408 | static struct attribute * | |
e142c38c | 20409 | dwarf2_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) |
c906108c | 20410 | { |
a48e046c | 20411 | for (;;) |
c906108c | 20412 | { |
a48e046c TT |
20413 | unsigned int i; |
20414 | struct attribute *spec = NULL; | |
20415 | ||
20416 | for (i = 0; i < die->num_attrs; ++i) | |
20417 | { | |
20418 | if (die->attrs[i].name == name) | |
20419 | return &die->attrs[i]; | |
20420 | if (die->attrs[i].name == DW_AT_specification | |
20421 | || die->attrs[i].name == DW_AT_abstract_origin) | |
20422 | spec = &die->attrs[i]; | |
20423 | } | |
20424 | ||
20425 | if (!spec) | |
20426 | break; | |
c906108c | 20427 | |
f2f0e013 | 20428 | die = follow_die_ref (die, spec, &cu); |
f2f0e013 | 20429 | } |
c5aa993b | 20430 | |
c906108c SS |
20431 | return NULL; |
20432 | } | |
20433 | ||
7d45c7c3 KB |
20434 | /* Return the string associated with a string-typed attribute, or NULL if it |
20435 | is either not found or is of an incorrect type. */ | |
20436 | ||
20437 | static const char * | |
20438 | dwarf2_string_attr (struct die_info *die, unsigned int name, struct dwarf2_cu *cu) | |
20439 | { | |
20440 | struct attribute *attr; | |
20441 | const char *str = NULL; | |
20442 | ||
20443 | attr = dwarf2_attr (die, name, cu); | |
20444 | ||
20445 | if (attr != NULL) | |
20446 | { | |
95f982e5 | 20447 | str = attr->as_string (); |
e61108c9 | 20448 | if (str == nullptr) |
dda83cd7 | 20449 | complaint (_("string type expected for attribute %s for " |
9d8780f0 SM |
20450 | "DIE at %s in module %s"), |
20451 | dwarf_attr_name (name), sect_offset_str (die->sect_off), | |
5e22e966 | 20452 | objfile_name (cu->per_objfile->objfile)); |
7d45c7c3 KB |
20453 | } |
20454 | ||
20455 | return str; | |
20456 | } | |
20457 | ||
a084a2a6 | 20458 | /* Return the dwo name or NULL if not present. If present, it is in either |
85102364 | 20459 | DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */ |
a084a2a6 AT |
20460 | static const char * |
20461 | dwarf2_dwo_name (struct die_info *die, struct dwarf2_cu *cu) | |
20462 | { | |
20463 | const char *dwo_name = dwarf2_string_attr (die, DW_AT_GNU_dwo_name, cu); | |
20464 | if (dwo_name == nullptr) | |
20465 | dwo_name = dwarf2_string_attr (die, DW_AT_dwo_name, cu); | |
20466 | return dwo_name; | |
20467 | } | |
20468 | ||
05cf31d1 JB |
20469 | /* Return non-zero iff the attribute NAME is defined for the given DIE, |
20470 | and holds a non-zero value. This function should only be used for | |
2dc7f7b3 | 20471 | DW_FORM_flag or DW_FORM_flag_present attributes. */ |
05cf31d1 JB |
20472 | |
20473 | static int | |
20474 | dwarf2_flag_true_p (struct die_info *die, unsigned name, struct dwarf2_cu *cu) | |
20475 | { | |
20476 | struct attribute *attr = dwarf2_attr (die, name, cu); | |
20477 | ||
c45bc3f8 | 20478 | return attr != nullptr && attr->as_boolean (); |
05cf31d1 JB |
20479 | } |
20480 | ||
3ca72b44 | 20481 | static int |
e142c38c | 20482 | die_is_declaration (struct die_info *die, struct dwarf2_cu *cu) |
3ca72b44 | 20483 | { |
05cf31d1 JB |
20484 | /* A DIE is a declaration if it has a DW_AT_declaration attribute |
20485 | which value is non-zero. However, we have to be careful with | |
20486 | DIEs having a DW_AT_specification attribute, because dwarf2_attr() | |
20487 | (via dwarf2_flag_true_p) follows this attribute. So we may | |
20488 | end up accidently finding a declaration attribute that belongs | |
20489 | to a different DIE referenced by the specification attribute, | |
20490 | even though the given DIE does not have a declaration attribute. */ | |
20491 | return (dwarf2_flag_true_p (die, DW_AT_declaration, cu) | |
20492 | && dwarf2_attr (die, DW_AT_specification, cu) == NULL); | |
3ca72b44 AC |
20493 | } |
20494 | ||
63d06c5c | 20495 | /* Return the die giving the specification for DIE, if there is |
f2f0e013 | 20496 | one. *SPEC_CU is the CU containing DIE on input, and the CU |
edb3359d DJ |
20497 | containing the return value on output. If there is no |
20498 | specification, but there is an abstract origin, that is | |
20499 | returned. */ | |
63d06c5c DC |
20500 | |
20501 | static struct die_info * | |
f2f0e013 | 20502 | die_specification (struct die_info *die, struct dwarf2_cu **spec_cu) |
63d06c5c | 20503 | { |
f2f0e013 DJ |
20504 | struct attribute *spec_attr = dwarf2_attr (die, DW_AT_specification, |
20505 | *spec_cu); | |
63d06c5c | 20506 | |
edb3359d DJ |
20507 | if (spec_attr == NULL) |
20508 | spec_attr = dwarf2_attr (die, DW_AT_abstract_origin, *spec_cu); | |
20509 | ||
63d06c5c DC |
20510 | if (spec_attr == NULL) |
20511 | return NULL; | |
20512 | else | |
f2f0e013 | 20513 | return follow_die_ref (die, spec_attr, spec_cu); |
63d06c5c | 20514 | } |
c906108c | 20515 | |
527f3840 JK |
20516 | /* Stub for free_line_header to match void * callback types. */ |
20517 | ||
20518 | static void | |
20519 | free_line_header_voidp (void *arg) | |
20520 | { | |
9a3c8263 | 20521 | struct line_header *lh = (struct line_header *) arg; |
527f3840 | 20522 | |
fff8551c | 20523 | delete lh; |
527f3840 JK |
20524 | } |
20525 | ||
83769d0b | 20526 | /* A convenience function to find the proper .debug_line section for a CU. */ |
36586728 TT |
20527 | |
20528 | static struct dwarf2_section_info * | |
20529 | get_debug_line_section (struct dwarf2_cu *cu) | |
20530 | { | |
20531 | struct dwarf2_section_info *section; | |
976ca316 | 20532 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
36586728 TT |
20533 | |
20534 | /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the | |
20535 | DWO file. */ | |
20536 | if (cu->dwo_unit && cu->per_cu->is_debug_types) | |
20537 | section = &cu->dwo_unit->dwo_file->sections.line; | |
20538 | else if (cu->per_cu->is_dwz) | |
20539 | { | |
a7308ce0 | 20540 | dwz_file *dwz = dwarf2_get_dwz_file (per_objfile->per_bfd, true); |
36586728 TT |
20541 | |
20542 | section = &dwz->line; | |
20543 | } | |
20544 | else | |
976ca316 | 20545 | section = &per_objfile->per_bfd->line; |
36586728 TT |
20546 | |
20547 | return section; | |
20548 | } | |
20549 | ||
debd256d | 20550 | /* Read the statement program header starting at OFFSET in |
3019eac3 | 20551 | .debug_line, or .debug_line.dwo. Return a pointer |
6502dd73 | 20552 | to a struct line_header, allocated using xmalloc. |
cd366ee8 DE |
20553 | Returns NULL if there is a problem reading the header, e.g., if it |
20554 | has a version we don't understand. | |
debd256d JB |
20555 | |
20556 | NOTE: the strings in the include directory and file name tables of | |
3019eac3 DE |
20557 | the returned object point into the dwarf line section buffer, |
20558 | and must not be freed. */ | |
ae2de4f8 | 20559 | |
fff8551c | 20560 | static line_header_up |
9c541725 | 20561 | dwarf_decode_line_header (sect_offset sect_off, struct dwarf2_cu *cu) |
debd256d | 20562 | { |
3019eac3 | 20563 | struct dwarf2_section_info *section; |
976ca316 | 20564 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
3019eac3 | 20565 | |
36586728 | 20566 | section = get_debug_line_section (cu); |
976ca316 | 20567 | section->read (per_objfile->objfile); |
3019eac3 | 20568 | if (section->buffer == NULL) |
debd256d | 20569 | { |
3019eac3 | 20570 | if (cu->dwo_unit && cu->per_cu->is_debug_types) |
b98664d3 | 20571 | complaint (_("missing .debug_line.dwo section")); |
3019eac3 | 20572 | else |
b98664d3 | 20573 | complaint (_("missing .debug_line section")); |
debd256d JB |
20574 | return 0; |
20575 | } | |
20576 | ||
0df7ad3a | 20577 | return dwarf_decode_line_header (sect_off, cu->per_cu->is_dwz, |
976ca316 | 20578 | per_objfile, section, &cu->header); |
debd256d | 20579 | } |
c906108c | 20580 | |
c6da4cef | 20581 | /* Subroutine of dwarf_decode_lines to simplify it. |
7ba99d21 | 20582 | Return the file name of the psymtab for the given file_entry. |
c6da4cef | 20583 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. |
c89b44cd TT |
20584 | If space for the result is malloc'd, *NAME_HOLDER will be set. |
20585 | Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */ | |
c6da4cef | 20586 | |
d521ce57 | 20587 | static const char * |
7ba99d21 | 20588 | psymtab_include_file_name (const struct line_header *lh, const file_entry &fe, |
891813be | 20589 | const dwarf2_psymtab *pst, |
c89b44cd TT |
20590 | const char *comp_dir, |
20591 | gdb::unique_xmalloc_ptr<char> *name_holder) | |
c6da4cef | 20592 | { |
d521ce57 TT |
20593 | const char *include_name = fe.name; |
20594 | const char *include_name_to_compare = include_name; | |
72b9f47f | 20595 | const char *pst_filename; |
c6da4cef DE |
20596 | int file_is_pst; |
20597 | ||
8c43009f | 20598 | const char *dir_name = fe.include_dir (lh); |
c6da4cef | 20599 | |
c89b44cd | 20600 | gdb::unique_xmalloc_ptr<char> hold_compare; |
c6da4cef DE |
20601 | if (!IS_ABSOLUTE_PATH (include_name) |
20602 | && (dir_name != NULL || comp_dir != NULL)) | |
20603 | { | |
20604 | /* Avoid creating a duplicate psymtab for PST. | |
20605 | We do this by comparing INCLUDE_NAME and PST_FILENAME. | |
20606 | Before we do the comparison, however, we need to account | |
20607 | for DIR_NAME and COMP_DIR. | |
20608 | First prepend dir_name (if non-NULL). If we still don't | |
20609 | have an absolute path prepend comp_dir (if non-NULL). | |
20610 | However, the directory we record in the include-file's | |
20611 | psymtab does not contain COMP_DIR (to match the | |
20612 | corresponding symtab(s)). | |
20613 | ||
20614 | Example: | |
20615 | ||
20616 | bash$ cd /tmp | |
20617 | bash$ gcc -g ./hello.c | |
20618 | include_name = "hello.c" | |
20619 | dir_name = "." | |
20620 | DW_AT_comp_dir = comp_dir = "/tmp" | |
5f52445b YQ |
20621 | DW_AT_name = "./hello.c" |
20622 | ||
20623 | */ | |
c6da4cef DE |
20624 | |
20625 | if (dir_name != NULL) | |
20626 | { | |
c89b44cd TT |
20627 | name_holder->reset (concat (dir_name, SLASH_STRING, |
20628 | include_name, (char *) NULL)); | |
20629 | include_name = name_holder->get (); | |
c6da4cef | 20630 | include_name_to_compare = include_name; |
c6da4cef DE |
20631 | } |
20632 | if (!IS_ABSOLUTE_PATH (include_name) && comp_dir != NULL) | |
20633 | { | |
c89b44cd TT |
20634 | hold_compare.reset (concat (comp_dir, SLASH_STRING, |
20635 | include_name, (char *) NULL)); | |
20636 | include_name_to_compare = hold_compare.get (); | |
c6da4cef DE |
20637 | } |
20638 | } | |
20639 | ||
20640 | pst_filename = pst->filename; | |
c89b44cd | 20641 | gdb::unique_xmalloc_ptr<char> copied_name; |
c6da4cef DE |
20642 | if (!IS_ABSOLUTE_PATH (pst_filename) && pst->dirname != NULL) |
20643 | { | |
c89b44cd TT |
20644 | copied_name.reset (concat (pst->dirname, SLASH_STRING, |
20645 | pst_filename, (char *) NULL)); | |
20646 | pst_filename = copied_name.get (); | |
c6da4cef DE |
20647 | } |
20648 | ||
1e3fad37 | 20649 | file_is_pst = FILENAME_CMP (include_name_to_compare, pst_filename) == 0; |
c6da4cef | 20650 | |
c6da4cef DE |
20651 | if (file_is_pst) |
20652 | return NULL; | |
20653 | return include_name; | |
20654 | } | |
20655 | ||
d9b3de22 DE |
20656 | /* State machine to track the state of the line number program. */ |
20657 | ||
6f77053d | 20658 | class lnp_state_machine |
d9b3de22 | 20659 | { |
6f77053d PA |
20660 | public: |
20661 | /* Initialize a machine state for the start of a line number | |
20662 | program. */ | |
804d2729 TT |
20663 | lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, line_header *lh, |
20664 | bool record_lines_p); | |
6f77053d | 20665 | |
8c43009f PA |
20666 | file_entry *current_file () |
20667 | { | |
20668 | /* lh->file_names is 0-based, but the file name numbers in the | |
20669 | statement program are 1-based. */ | |
6f77053d PA |
20670 | return m_line_header->file_name_at (m_file); |
20671 | } | |
20672 | ||
20673 | /* Record the line in the state machine. END_SEQUENCE is true if | |
20674 | we're processing the end of a sequence. */ | |
20675 | void record_line (bool end_sequence); | |
20676 | ||
a8caed5d | 20677 | /* Check ADDRESS is -1, or zero and less than UNRELOCATED_LOWPC, and if true |
7ab6656f | 20678 | nop-out rest of the lines in this sequence. */ |
6f77053d PA |
20679 | void check_line_address (struct dwarf2_cu *cu, |
20680 | const gdb_byte *line_ptr, | |
7ab6656f | 20681 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address); |
6f77053d PA |
20682 | |
20683 | void handle_set_discriminator (unsigned int discriminator) | |
20684 | { | |
20685 | m_discriminator = discriminator; | |
20686 | m_line_has_non_zero_discriminator |= discriminator != 0; | |
20687 | } | |
20688 | ||
20689 | /* Handle DW_LNE_set_address. */ | |
20690 | void handle_set_address (CORE_ADDR baseaddr, CORE_ADDR address) | |
20691 | { | |
20692 | m_op_index = 0; | |
20693 | address += baseaddr; | |
20694 | m_address = gdbarch_adjust_dwarf2_line (m_gdbarch, address, false); | |
20695 | } | |
20696 | ||
20697 | /* Handle DW_LNS_advance_pc. */ | |
20698 | void handle_advance_pc (CORE_ADDR adjust); | |
20699 | ||
20700 | /* Handle a special opcode. */ | |
20701 | void handle_special_opcode (unsigned char op_code); | |
20702 | ||
20703 | /* Handle DW_LNS_advance_line. */ | |
20704 | void handle_advance_line (int line_delta) | |
20705 | { | |
20706 | advance_line (line_delta); | |
20707 | } | |
20708 | ||
20709 | /* Handle DW_LNS_set_file. */ | |
20710 | void handle_set_file (file_name_index file); | |
20711 | ||
20712 | /* Handle DW_LNS_negate_stmt. */ | |
20713 | void handle_negate_stmt () | |
20714 | { | |
20715 | m_is_stmt = !m_is_stmt; | |
20716 | } | |
20717 | ||
20718 | /* Handle DW_LNS_const_add_pc. */ | |
20719 | void handle_const_add_pc (); | |
20720 | ||
20721 | /* Handle DW_LNS_fixed_advance_pc. */ | |
20722 | void handle_fixed_advance_pc (CORE_ADDR addr_adj) | |
20723 | { | |
20724 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20725 | m_op_index = 0; | |
20726 | } | |
20727 | ||
20728 | /* Handle DW_LNS_copy. */ | |
20729 | void handle_copy () | |
20730 | { | |
20731 | record_line (false); | |
20732 | m_discriminator = 0; | |
20733 | } | |
20734 | ||
20735 | /* Handle DW_LNE_end_sequence. */ | |
20736 | void handle_end_sequence () | |
20737 | { | |
804d2729 | 20738 | m_currently_recording_lines = true; |
6f77053d PA |
20739 | } |
20740 | ||
20741 | private: | |
20742 | /* Advance the line by LINE_DELTA. */ | |
20743 | void advance_line (int line_delta) | |
20744 | { | |
20745 | m_line += line_delta; | |
20746 | ||
20747 | if (line_delta != 0) | |
20748 | m_line_has_non_zero_discriminator = m_discriminator != 0; | |
8c43009f PA |
20749 | } |
20750 | ||
804d2729 TT |
20751 | struct dwarf2_cu *m_cu; |
20752 | ||
6f77053d PA |
20753 | gdbarch *m_gdbarch; |
20754 | ||
20755 | /* True if we're recording lines. | |
20756 | Otherwise we're building partial symtabs and are just interested in | |
20757 | finding include files mentioned by the line number program. */ | |
20758 | bool m_record_lines_p; | |
20759 | ||
8c43009f | 20760 | /* The line number header. */ |
6f77053d | 20761 | line_header *m_line_header; |
8c43009f | 20762 | |
6f77053d PA |
20763 | /* These are part of the standard DWARF line number state machine, |
20764 | and initialized according to the DWARF spec. */ | |
d9b3de22 | 20765 | |
6f77053d | 20766 | unsigned char m_op_index = 0; |
7ba99d21 AT |
20767 | /* The line table index of the current file. */ |
20768 | file_name_index m_file = 1; | |
6f77053d PA |
20769 | unsigned int m_line = 1; |
20770 | ||
20771 | /* These are initialized in the constructor. */ | |
20772 | ||
20773 | CORE_ADDR m_address; | |
20774 | bool m_is_stmt; | |
20775 | unsigned int m_discriminator; | |
d9b3de22 DE |
20776 | |
20777 | /* Additional bits of state we need to track. */ | |
20778 | ||
20779 | /* The last file that we called dwarf2_start_subfile for. | |
20780 | This is only used for TLLs. */ | |
6f77053d | 20781 | unsigned int m_last_file = 0; |
d9b3de22 | 20782 | /* The last file a line number was recorded for. */ |
6f77053d | 20783 | struct subfile *m_last_subfile = NULL; |
d9b3de22 | 20784 | |
1313c56e AB |
20785 | /* The address of the last line entry. */ |
20786 | CORE_ADDR m_last_address; | |
20787 | ||
20788 | /* Set to true when a previous line at the same address (using | |
20789 | m_last_address) had m_is_stmt true. This is reset to false when a | |
20790 | line entry at a new address (m_address different to m_last_address) is | |
20791 | processed. */ | |
20792 | bool m_stmt_at_address = false; | |
20793 | ||
804d2729 TT |
20794 | /* When true, record the lines we decode. */ |
20795 | bool m_currently_recording_lines = false; | |
d9b3de22 DE |
20796 | |
20797 | /* The last line number that was recorded, used to coalesce | |
20798 | consecutive entries for the same line. This can happen, for | |
20799 | example, when discriminators are present. PR 17276. */ | |
6f77053d PA |
20800 | unsigned int m_last_line = 0; |
20801 | bool m_line_has_non_zero_discriminator = false; | |
8c43009f | 20802 | }; |
d9b3de22 | 20803 | |
6f77053d PA |
20804 | void |
20805 | lnp_state_machine::handle_advance_pc (CORE_ADDR adjust) | |
20806 | { | |
20807 | CORE_ADDR addr_adj = (((m_op_index + adjust) | |
20808 | / m_line_header->maximum_ops_per_instruction) | |
20809 | * m_line_header->minimum_instruction_length); | |
20810 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20811 | m_op_index = ((m_op_index + adjust) | |
20812 | % m_line_header->maximum_ops_per_instruction); | |
20813 | } | |
d9b3de22 | 20814 | |
6f77053d PA |
20815 | void |
20816 | lnp_state_machine::handle_special_opcode (unsigned char op_code) | |
d9b3de22 | 20817 | { |
6f77053d | 20818 | unsigned char adj_opcode = op_code - m_line_header->opcode_base; |
258bf0ee RB |
20819 | unsigned char adj_opcode_d = adj_opcode / m_line_header->line_range; |
20820 | unsigned char adj_opcode_r = adj_opcode % m_line_header->line_range; | |
20821 | CORE_ADDR addr_adj = (((m_op_index + adj_opcode_d) | |
6f77053d PA |
20822 | / m_line_header->maximum_ops_per_instruction) |
20823 | * m_line_header->minimum_instruction_length); | |
20824 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
258bf0ee | 20825 | m_op_index = ((m_op_index + adj_opcode_d) |
6f77053d | 20826 | % m_line_header->maximum_ops_per_instruction); |
d9b3de22 | 20827 | |
258bf0ee | 20828 | int line_delta = m_line_header->line_base + adj_opcode_r; |
6f77053d PA |
20829 | advance_line (line_delta); |
20830 | record_line (false); | |
20831 | m_discriminator = 0; | |
20832 | } | |
d9b3de22 | 20833 | |
6f77053d PA |
20834 | void |
20835 | lnp_state_machine::handle_set_file (file_name_index file) | |
20836 | { | |
20837 | m_file = file; | |
20838 | ||
20839 | const file_entry *fe = current_file (); | |
20840 | if (fe == NULL) | |
20841 | dwarf2_debug_line_missing_file_complaint (); | |
20842 | else if (m_record_lines_p) | |
20843 | { | |
20844 | const char *dir = fe->include_dir (m_line_header); | |
20845 | ||
c24bdb02 | 20846 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 20847 | m_line_has_non_zero_discriminator = m_discriminator != 0; |
804d2729 | 20848 | dwarf2_start_subfile (m_cu, fe->name, dir); |
6f77053d PA |
20849 | } |
20850 | } | |
20851 | ||
20852 | void | |
20853 | lnp_state_machine::handle_const_add_pc () | |
20854 | { | |
20855 | CORE_ADDR adjust | |
20856 | = (255 - m_line_header->opcode_base) / m_line_header->line_range; | |
20857 | ||
20858 | CORE_ADDR addr_adj | |
20859 | = (((m_op_index + adjust) | |
20860 | / m_line_header->maximum_ops_per_instruction) | |
20861 | * m_line_header->minimum_instruction_length); | |
20862 | ||
20863 | m_address += gdbarch_adjust_dwarf2_line (m_gdbarch, addr_adj, true); | |
20864 | m_op_index = ((m_op_index + adjust) | |
20865 | % m_line_header->maximum_ops_per_instruction); | |
20866 | } | |
d9b3de22 | 20867 | |
a05a36a5 DE |
20868 | /* Return non-zero if we should add LINE to the line number table. |
20869 | LINE is the line to add, LAST_LINE is the last line that was added, | |
20870 | LAST_SUBFILE is the subfile for LAST_LINE. | |
20871 | LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever | |
20872 | had a non-zero discriminator. | |
20873 | ||
20874 | We have to be careful in the presence of discriminators. | |
20875 | E.g., for this line: | |
20876 | ||
20877 | for (i = 0; i < 100000; i++); | |
20878 | ||
20879 | clang can emit four line number entries for that one line, | |
20880 | each with a different discriminator. | |
20881 | See gdb.dwarf2/dw2-single-line-discriminators.exp for an example. | |
20882 | ||
20883 | However, we want gdb to coalesce all four entries into one. | |
20884 | Otherwise the user could stepi into the middle of the line and | |
20885 | gdb would get confused about whether the pc really was in the | |
20886 | middle of the line. | |
20887 | ||
20888 | Things are further complicated by the fact that two consecutive | |
20889 | line number entries for the same line is a heuristic used by gcc | |
20890 | to denote the end of the prologue. So we can't just discard duplicate | |
20891 | entries, we have to be selective about it. The heuristic we use is | |
20892 | that we only collapse consecutive entries for the same line if at least | |
20893 | one of those entries has a non-zero discriminator. PR 17276. | |
20894 | ||
20895 | Note: Addresses in the line number state machine can never go backwards | |
20896 | within one sequence, thus this coalescing is ok. */ | |
20897 | ||
20898 | static int | |
804d2729 TT |
20899 | dwarf_record_line_p (struct dwarf2_cu *cu, |
20900 | unsigned int line, unsigned int last_line, | |
a05a36a5 DE |
20901 | int line_has_non_zero_discriminator, |
20902 | struct subfile *last_subfile) | |
20903 | { | |
c24bdb02 | 20904 | if (cu->get_builder ()->get_current_subfile () != last_subfile) |
a05a36a5 DE |
20905 | return 1; |
20906 | if (line != last_line) | |
20907 | return 1; | |
20908 | /* Same line for the same file that we've seen already. | |
20909 | As a last check, for pr 17276, only record the line if the line | |
20910 | has never had a non-zero discriminator. */ | |
20911 | if (!line_has_non_zero_discriminator) | |
20912 | return 1; | |
20913 | return 0; | |
20914 | } | |
20915 | ||
804d2729 TT |
20916 | /* Use the CU's builder to record line number LINE beginning at |
20917 | address ADDRESS in the line table of subfile SUBFILE. */ | |
252a6764 DE |
20918 | |
20919 | static void | |
d9b3de22 | 20920 | dwarf_record_line_1 (struct gdbarch *gdbarch, struct subfile *subfile, |
8c95582d | 20921 | unsigned int line, CORE_ADDR address, bool is_stmt, |
804d2729 | 20922 | struct dwarf2_cu *cu) |
252a6764 DE |
20923 | { |
20924 | CORE_ADDR addr = gdbarch_addr_bits_remove (gdbarch, address); | |
20925 | ||
27e0867f DE |
20926 | if (dwarf_line_debug) |
20927 | { | |
20928 | fprintf_unfiltered (gdb_stdlog, | |
20929 | "Recording line %u, file %s, address %s\n", | |
20930 | line, lbasename (subfile->name), | |
20931 | paddress (gdbarch, address)); | |
20932 | } | |
20933 | ||
804d2729 | 20934 | if (cu != nullptr) |
8c95582d | 20935 | cu->get_builder ()->record_line (subfile, line, addr, is_stmt); |
252a6764 DE |
20936 | } |
20937 | ||
20938 | /* Subroutine of dwarf_decode_lines_1 to simplify it. | |
20939 | Mark the end of a set of line number records. | |
d9b3de22 | 20940 | The arguments are the same as for dwarf_record_line_1. |
252a6764 DE |
20941 | If SUBFILE is NULL the request is ignored. */ |
20942 | ||
20943 | static void | |
20944 | dwarf_finish_line (struct gdbarch *gdbarch, struct subfile *subfile, | |
804d2729 | 20945 | CORE_ADDR address, struct dwarf2_cu *cu) |
252a6764 | 20946 | { |
27e0867f DE |
20947 | if (subfile == NULL) |
20948 | return; | |
20949 | ||
20950 | if (dwarf_line_debug) | |
20951 | { | |
20952 | fprintf_unfiltered (gdb_stdlog, | |
20953 | "Finishing current line, file %s, address %s\n", | |
20954 | lbasename (subfile->name), | |
20955 | paddress (gdbarch, address)); | |
20956 | } | |
20957 | ||
8c95582d | 20958 | dwarf_record_line_1 (gdbarch, subfile, 0, address, true, cu); |
d9b3de22 DE |
20959 | } |
20960 | ||
6f77053d PA |
20961 | void |
20962 | lnp_state_machine::record_line (bool end_sequence) | |
d9b3de22 | 20963 | { |
d9b3de22 DE |
20964 | if (dwarf_line_debug) |
20965 | { | |
20966 | fprintf_unfiltered (gdb_stdlog, | |
20967 | "Processing actual line %u: file %u," | |
94a72be7 | 20968 | " address %s, is_stmt %u, discrim %u%s\n", |
7ba99d21 | 20969 | m_line, m_file, |
6f77053d | 20970 | paddress (m_gdbarch, m_address), |
94a72be7 AB |
20971 | m_is_stmt, m_discriminator, |
20972 | (end_sequence ? "\t(end sequence)" : "")); | |
d9b3de22 DE |
20973 | } |
20974 | ||
6f77053d | 20975 | file_entry *fe = current_file (); |
8c43009f PA |
20976 | |
20977 | if (fe == NULL) | |
d9b3de22 DE |
20978 | dwarf2_debug_line_missing_file_complaint (); |
20979 | /* For now we ignore lines not starting on an instruction boundary. | |
20980 | But not when processing end_sequence for compatibility with the | |
20981 | previous version of the code. */ | |
6f77053d | 20982 | else if (m_op_index == 0 || end_sequence) |
d9b3de22 | 20983 | { |
8c43009f | 20984 | fe->included_p = 1; |
8c95582d | 20985 | if (m_record_lines_p) |
d9b3de22 | 20986 | { |
1313c56e AB |
20987 | /* When we switch files we insert an end maker in the first file, |
20988 | switch to the second file and add a new line entry. The | |
20989 | problem is that the end marker inserted in the first file will | |
20990 | discard any previous line entries at the same address. If the | |
20991 | line entries in the first file are marked as is-stmt, while | |
20992 | the new line in the second file is non-stmt, then this means | |
20993 | the end marker will discard is-stmt lines so we can have a | |
20994 | non-stmt line. This means that there are less addresses at | |
20995 | which the user can insert a breakpoint. | |
20996 | ||
20997 | To improve this we track the last address in m_last_address, | |
20998 | and whether we have seen an is-stmt at this address. Then | |
20999 | when switching files, if we have seen a stmt at the current | |
21000 | address, and we are switching to create a non-stmt line, then | |
21001 | discard the new line. */ | |
21002 | bool file_changed | |
21003 | = m_last_subfile != m_cu->get_builder ()->get_current_subfile (); | |
21004 | bool ignore_this_line | |
dda83cd7 SM |
21005 | = ((file_changed && !end_sequence && m_last_address == m_address |
21006 | && !m_is_stmt && m_stmt_at_address) | |
21007 | || (!end_sequence && m_line == 0)); | |
1313c56e AB |
21008 | |
21009 | if ((file_changed && !ignore_this_line) || end_sequence) | |
d9b3de22 | 21010 | { |
804d2729 TT |
21011 | dwarf_finish_line (m_gdbarch, m_last_subfile, m_address, |
21012 | m_currently_recording_lines ? m_cu : nullptr); | |
d9b3de22 DE |
21013 | } |
21014 | ||
1313c56e | 21015 | if (!end_sequence && !ignore_this_line) |
d9b3de22 | 21016 | { |
8c95582d AB |
21017 | bool is_stmt = producer_is_codewarrior (m_cu) || m_is_stmt; |
21018 | ||
804d2729 | 21019 | if (dwarf_record_line_p (m_cu, m_line, m_last_line, |
6f77053d PA |
21020 | m_line_has_non_zero_discriminator, |
21021 | m_last_subfile)) | |
d9b3de22 | 21022 | { |
c24bdb02 | 21023 | buildsym_compunit *builder = m_cu->get_builder (); |
804d2729 | 21024 | dwarf_record_line_1 (m_gdbarch, |
c24bdb02 | 21025 | builder->get_current_subfile (), |
8c95582d | 21026 | m_line, m_address, is_stmt, |
804d2729 | 21027 | m_currently_recording_lines ? m_cu : nullptr); |
d9b3de22 | 21028 | } |
c24bdb02 | 21029 | m_last_subfile = m_cu->get_builder ()->get_current_subfile (); |
6f77053d | 21030 | m_last_line = m_line; |
d9b3de22 DE |
21031 | } |
21032 | } | |
21033 | } | |
1313c56e AB |
21034 | |
21035 | /* Track whether we have seen any m_is_stmt true at m_address in case we | |
21036 | have multiple line table entries all at m_address. */ | |
21037 | if (m_last_address != m_address) | |
21038 | { | |
21039 | m_stmt_at_address = false; | |
21040 | m_last_address = m_address; | |
21041 | } | |
21042 | m_stmt_at_address |= m_is_stmt; | |
d9b3de22 DE |
21043 | } |
21044 | ||
804d2729 TT |
21045 | lnp_state_machine::lnp_state_machine (struct dwarf2_cu *cu, gdbarch *arch, |
21046 | line_header *lh, bool record_lines_p) | |
d9b3de22 | 21047 | { |
804d2729 | 21048 | m_cu = cu; |
6f77053d PA |
21049 | m_gdbarch = arch; |
21050 | m_record_lines_p = record_lines_p; | |
21051 | m_line_header = lh; | |
d9b3de22 | 21052 | |
804d2729 | 21053 | m_currently_recording_lines = true; |
d9b3de22 | 21054 | |
d9b3de22 DE |
21055 | /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there |
21056 | was a line entry for it so that the backend has a chance to adjust it | |
21057 | and also record it in case it needs it. This is currently used by MIPS | |
21058 | code, cf. `mips_adjust_dwarf2_line'. */ | |
6f77053d PA |
21059 | m_address = gdbarch_adjust_dwarf2_line (arch, 0, 0); |
21060 | m_is_stmt = lh->default_is_stmt; | |
21061 | m_discriminator = 0; | |
1313c56e AB |
21062 | |
21063 | m_last_address = m_address; | |
21064 | m_stmt_at_address = false; | |
252a6764 DE |
21065 | } |
21066 | ||
6f77053d PA |
21067 | void |
21068 | lnp_state_machine::check_line_address (struct dwarf2_cu *cu, | |
21069 | const gdb_byte *line_ptr, | |
7ab6656f | 21070 | CORE_ADDR unrelocated_lowpc, CORE_ADDR address) |
924c2928 | 21071 | { |
a8caed5d FS |
21072 | /* Linkers resolve a symbolic relocation referencing a GC'd function to 0 or |
21073 | -1. If ADDRESS is 0, ignoring the opcode will err if the text section is | |
21074 | located at 0x0. In this case, additionally check that if | |
21075 | ADDRESS < UNRELOCATED_LOWPC. */ | |
924c2928 | 21076 | |
a8caed5d FS |
21077 | if ((address == 0 && address < unrelocated_lowpc) |
21078 | || address == (CORE_ADDR) -1) | |
924c2928 DE |
21079 | { |
21080 | /* This line table is for a function which has been | |
21081 | GCd by the linker. Ignore it. PR gdb/12528 */ | |
21082 | ||
5e22e966 | 21083 | struct objfile *objfile = cu->per_objfile->objfile; |
924c2928 DE |
21084 | long line_offset = line_ptr - get_debug_line_section (cu)->buffer; |
21085 | ||
b98664d3 | 21086 | complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"), |
924c2928 | 21087 | line_offset, objfile_name (objfile)); |
804d2729 TT |
21088 | m_currently_recording_lines = false; |
21089 | /* Note: m_currently_recording_lines is left as false until we see | |
21090 | DW_LNE_end_sequence. */ | |
924c2928 DE |
21091 | } |
21092 | } | |
21093 | ||
f3f5162e | 21094 | /* Subroutine of dwarf_decode_lines to simplify it. |
d9b3de22 DE |
21095 | Process the line number information in LH. |
21096 | If DECODE_FOR_PST_P is non-zero, all we do is process the line number | |
21097 | program in order to set included_p for every referenced header. */ | |
debd256d | 21098 | |
c906108c | 21099 | static void |
43f3e411 DE |
21100 | dwarf_decode_lines_1 (struct line_header *lh, struct dwarf2_cu *cu, |
21101 | const int decode_for_pst_p, CORE_ADDR lowpc) | |
c906108c | 21102 | { |
d521ce57 TT |
21103 | const gdb_byte *line_ptr, *extended_end; |
21104 | const gdb_byte *line_end; | |
a8c50c1f | 21105 | unsigned int bytes_read, extended_len; |
699ca60a | 21106 | unsigned char op_code, extended_op; |
e142c38c | 21107 | CORE_ADDR baseaddr; |
5e22e966 | 21108 | struct objfile *objfile = cu->per_objfile->objfile; |
f3f5162e | 21109 | bfd *abfd = objfile->obfd; |
08feed99 | 21110 | struct gdbarch *gdbarch = objfile->arch (); |
6f77053d PA |
21111 | /* True if we're recording line info (as opposed to building partial |
21112 | symtabs and just interested in finding include files mentioned by | |
21113 | the line number program). */ | |
21114 | bool record_lines_p = !decode_for_pst_p; | |
e142c38c | 21115 | |
b3b3bada | 21116 | baseaddr = objfile->text_section_offset (); |
c906108c | 21117 | |
debd256d JB |
21118 | line_ptr = lh->statement_program_start; |
21119 | line_end = lh->statement_program_end; | |
c906108c SS |
21120 | |
21121 | /* Read the statement sequences until there's nothing left. */ | |
21122 | while (line_ptr < line_end) | |
21123 | { | |
6f77053d PA |
21124 | /* The DWARF line number program state machine. Reset the state |
21125 | machine at the start of each sequence. */ | |
804d2729 | 21126 | lnp_state_machine state_machine (cu, gdbarch, lh, record_lines_p); |
6f77053d | 21127 | bool end_sequence = false; |
d9b3de22 | 21128 | |
8c43009f | 21129 | if (record_lines_p) |
c906108c | 21130 | { |
8c43009f PA |
21131 | /* Start a subfile for the current file of the state |
21132 | machine. */ | |
21133 | const file_entry *fe = state_machine.current_file (); | |
21134 | ||
21135 | if (fe != NULL) | |
804d2729 | 21136 | dwarf2_start_subfile (cu, fe->name, fe->include_dir (lh)); |
c906108c SS |
21137 | } |
21138 | ||
a738430d | 21139 | /* Decode the table. */ |
d9b3de22 | 21140 | while (line_ptr < line_end && !end_sequence) |
c906108c SS |
21141 | { |
21142 | op_code = read_1_byte (abfd, line_ptr); | |
21143 | line_ptr += 1; | |
9aa1fe7e | 21144 | |
debd256d | 21145 | if (op_code >= lh->opcode_base) |
6e70227d | 21146 | { |
8e07a239 | 21147 | /* Special opcode. */ |
6f77053d | 21148 | state_machine.handle_special_opcode (op_code); |
9aa1fe7e GK |
21149 | } |
21150 | else switch (op_code) | |
c906108c SS |
21151 | { |
21152 | case DW_LNS_extended_op: | |
3e43a32a MS |
21153 | extended_len = read_unsigned_leb128 (abfd, line_ptr, |
21154 | &bytes_read); | |
473b7be6 | 21155 | line_ptr += bytes_read; |
a8c50c1f | 21156 | extended_end = line_ptr + extended_len; |
c906108c SS |
21157 | extended_op = read_1_byte (abfd, line_ptr); |
21158 | line_ptr += 1; | |
8f34b746 TV |
21159 | if (DW_LNE_lo_user <= extended_op |
21160 | && extended_op <= DW_LNE_hi_user) | |
21161 | { | |
21162 | /* Vendor extension, ignore. */ | |
21163 | line_ptr = extended_end; | |
21164 | break; | |
21165 | } | |
c906108c SS |
21166 | switch (extended_op) |
21167 | { | |
21168 | case DW_LNE_end_sequence: | |
6f77053d PA |
21169 | state_machine.handle_end_sequence (); |
21170 | end_sequence = true; | |
c906108c SS |
21171 | break; |
21172 | case DW_LNE_set_address: | |
d9b3de22 DE |
21173 | { |
21174 | CORE_ADDR address | |
c8a7a66f | 21175 | = cu->header.read_address (abfd, line_ptr, &bytes_read); |
d9b3de22 | 21176 | line_ptr += bytes_read; |
6f77053d PA |
21177 | |
21178 | state_machine.check_line_address (cu, line_ptr, | |
7ab6656f | 21179 | lowpc - baseaddr, address); |
6f77053d | 21180 | state_machine.handle_set_address (baseaddr, address); |
d9b3de22 | 21181 | } |
c906108c SS |
21182 | break; |
21183 | case DW_LNE_define_file: | |
dda83cd7 SM |
21184 | { |
21185 | const char *cur_file; | |
ecfb656c PA |
21186 | unsigned int mod_time, length; |
21187 | dir_index dindex; | |
6e70227d | 21188 | |
dda83cd7 | 21189 | cur_file = read_direct_string (abfd, line_ptr, |
3e43a32a | 21190 | &bytes_read); |
dda83cd7 SM |
21191 | line_ptr += bytes_read; |
21192 | dindex = (dir_index) | |
21193 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21194 | line_ptr += bytes_read; | |
21195 | mod_time = | |
21196 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21197 | line_ptr += bytes_read; | |
21198 | length = | |
21199 | read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21200 | line_ptr += bytes_read; | |
21201 | lh->add_file_name (cur_file, dindex, mod_time, length); | |
21202 | } | |
c906108c | 21203 | break; |
d0c6ba3d | 21204 | case DW_LNE_set_discriminator: |
6f77053d PA |
21205 | { |
21206 | /* The discriminator is not interesting to the | |
21207 | debugger; just ignore it. We still need to | |
21208 | check its value though: | |
21209 | if there are consecutive entries for the same | |
21210 | (non-prologue) line we want to coalesce them. | |
21211 | PR 17276. */ | |
21212 | unsigned int discr | |
21213 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21214 | line_ptr += bytes_read; | |
21215 | ||
21216 | state_machine.handle_set_discriminator (discr); | |
21217 | } | |
d0c6ba3d | 21218 | break; |
c906108c | 21219 | default: |
b98664d3 | 21220 | complaint (_("mangled .debug_line section")); |
debd256d | 21221 | return; |
c906108c | 21222 | } |
a8c50c1f DJ |
21223 | /* Make sure that we parsed the extended op correctly. If e.g. |
21224 | we expected a different address size than the producer used, | |
21225 | we may have read the wrong number of bytes. */ | |
21226 | if (line_ptr != extended_end) | |
21227 | { | |
b98664d3 | 21228 | complaint (_("mangled .debug_line section")); |
a8c50c1f DJ |
21229 | return; |
21230 | } | |
c906108c SS |
21231 | break; |
21232 | case DW_LNS_copy: | |
6f77053d | 21233 | state_machine.handle_copy (); |
c906108c SS |
21234 | break; |
21235 | case DW_LNS_advance_pc: | |
2dc7f7b3 TT |
21236 | { |
21237 | CORE_ADDR adjust | |
21238 | = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
2dc7f7b3 | 21239 | line_ptr += bytes_read; |
6f77053d PA |
21240 | |
21241 | state_machine.handle_advance_pc (adjust); | |
2dc7f7b3 | 21242 | } |
c906108c SS |
21243 | break; |
21244 | case DW_LNS_advance_line: | |
a05a36a5 DE |
21245 | { |
21246 | int line_delta | |
21247 | = read_signed_leb128 (abfd, line_ptr, &bytes_read); | |
a05a36a5 | 21248 | line_ptr += bytes_read; |
6f77053d PA |
21249 | |
21250 | state_machine.handle_advance_line (line_delta); | |
a05a36a5 | 21251 | } |
c906108c SS |
21252 | break; |
21253 | case DW_LNS_set_file: | |
d9b3de22 | 21254 | { |
6f77053d | 21255 | file_name_index file |
ecfb656c PA |
21256 | = (file_name_index) read_unsigned_leb128 (abfd, line_ptr, |
21257 | &bytes_read); | |
d9b3de22 | 21258 | line_ptr += bytes_read; |
8c43009f | 21259 | |
6f77053d | 21260 | state_machine.handle_set_file (file); |
d9b3de22 | 21261 | } |
c906108c SS |
21262 | break; |
21263 | case DW_LNS_set_column: | |
0ad93d4f | 21264 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); |
c906108c SS |
21265 | line_ptr += bytes_read; |
21266 | break; | |
21267 | case DW_LNS_negate_stmt: | |
6f77053d | 21268 | state_machine.handle_negate_stmt (); |
c906108c SS |
21269 | break; |
21270 | case DW_LNS_set_basic_block: | |
c906108c | 21271 | break; |
c2c6d25f JM |
21272 | /* Add to the address register of the state machine the |
21273 | address increment value corresponding to special opcode | |
a738430d MK |
21274 | 255. I.e., this value is scaled by the minimum |
21275 | instruction length since special opcode 255 would have | |
b021a221 | 21276 | scaled the increment. */ |
c906108c | 21277 | case DW_LNS_const_add_pc: |
6f77053d | 21278 | state_machine.handle_const_add_pc (); |
c906108c SS |
21279 | break; |
21280 | case DW_LNS_fixed_advance_pc: | |
3e29f34a | 21281 | { |
6f77053d | 21282 | CORE_ADDR addr_adj = read_2_bytes (abfd, line_ptr); |
3e29f34a | 21283 | line_ptr += 2; |
6f77053d PA |
21284 | |
21285 | state_machine.handle_fixed_advance_pc (addr_adj); | |
3e29f34a | 21286 | } |
c906108c | 21287 | break; |
9aa1fe7e | 21288 | default: |
a738430d MK |
21289 | { |
21290 | /* Unknown standard opcode, ignore it. */ | |
9aa1fe7e | 21291 | int i; |
a738430d | 21292 | |
debd256d | 21293 | for (i = 0; i < lh->standard_opcode_lengths[op_code]; i++) |
9aa1fe7e GK |
21294 | { |
21295 | (void) read_unsigned_leb128 (abfd, line_ptr, &bytes_read); | |
21296 | line_ptr += bytes_read; | |
21297 | } | |
21298 | } | |
c906108c SS |
21299 | } |
21300 | } | |
d9b3de22 DE |
21301 | |
21302 | if (!end_sequence) | |
21303 | dwarf2_debug_line_missing_end_sequence_complaint (); | |
21304 | ||
21305 | /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer, | |
21306 | in which case we still finish recording the last line). */ | |
6f77053d | 21307 | state_machine.record_line (true); |
c906108c | 21308 | } |
f3f5162e DE |
21309 | } |
21310 | ||
21311 | /* Decode the Line Number Program (LNP) for the given line_header | |
21312 | structure and CU. The actual information extracted and the type | |
21313 | of structures created from the LNP depends on the value of PST. | |
21314 | ||
21315 | 1. If PST is NULL, then this procedure uses the data from the program | |
21316 | to create all necessary symbol tables, and their linetables. | |
21317 | ||
21318 | 2. If PST is not NULL, this procedure reads the program to determine | |
21319 | the list of files included by the unit represented by PST, and | |
21320 | builds all the associated partial symbol tables. | |
21321 | ||
21322 | COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown. | |
21323 | It is used for relative paths in the line table. | |
21324 | NOTE: When processing partial symtabs (pst != NULL), | |
21325 | comp_dir == pst->dirname. | |
21326 | ||
21327 | NOTE: It is important that psymtabs have the same file name (via strcmp) | |
21328 | as the corresponding symtab. Since COMP_DIR is not used in the name of the | |
21329 | symtab we don't use it in the name of the psymtabs we create. | |
21330 | E.g. expand_line_sal requires this when finding psymtabs to expand. | |
c3b7b696 YQ |
21331 | A good testcase for this is mb-inline.exp. |
21332 | ||
527f3840 JK |
21333 | LOWPC is the lowest address in CU (or 0 if not known). |
21334 | ||
21335 | Boolean DECODE_MAPPING specifies we need to fully decode .debug_line | |
21336 | for its PC<->lines mapping information. Otherwise only the filename | |
21337 | table is read in. */ | |
f3f5162e DE |
21338 | |
21339 | static void | |
21340 | dwarf_decode_lines (struct line_header *lh, const char *comp_dir, | |
891813be | 21341 | struct dwarf2_cu *cu, dwarf2_psymtab *pst, |
527f3840 | 21342 | CORE_ADDR lowpc, int decode_mapping) |
f3f5162e | 21343 | { |
5e22e966 | 21344 | struct objfile *objfile = cu->per_objfile->objfile; |
f3f5162e | 21345 | const int decode_for_pst_p = (pst != NULL); |
f3f5162e | 21346 | |
527f3840 JK |
21347 | if (decode_mapping) |
21348 | dwarf_decode_lines_1 (lh, cu, decode_for_pst_p, lowpc); | |
aaa75496 JB |
21349 | |
21350 | if (decode_for_pst_p) | |
21351 | { | |
aaa75496 | 21352 | /* Now that we're done scanning the Line Header Program, we can |
dda83cd7 | 21353 | create the psymtab of each included file. */ |
7ba99d21 | 21354 | for (auto &file_entry : lh->file_names ()) |
dda83cd7 SM |
21355 | if (file_entry.included_p == 1) |
21356 | { | |
c89b44cd | 21357 | gdb::unique_xmalloc_ptr<char> name_holder; |
d521ce57 | 21358 | const char *include_name = |
7ba99d21 AT |
21359 | psymtab_include_file_name (lh, file_entry, pst, |
21360 | comp_dir, &name_holder); | |
c6da4cef | 21361 | if (include_name != NULL) |
7b249e47 TT |
21362 | dwarf2_create_include_psymtab |
21363 | (cu->per_objfile->per_bfd, include_name, pst, | |
21364 | cu->per_objfile->per_bfd->partial_symtabs.get (), | |
0072c873 | 21365 | objfile->per_bfd); |
dda83cd7 | 21366 | } |
aaa75496 | 21367 | } |
cb1df416 DJ |
21368 | else |
21369 | { | |
21370 | /* Make sure a symtab is created for every file, even files | |
21371 | which contain only variables (i.e. no code with associated | |
21372 | line numbers). */ | |
c24bdb02 KS |
21373 | buildsym_compunit *builder = cu->get_builder (); |
21374 | struct compunit_symtab *cust = builder->get_compunit_symtab (); | |
cb1df416 | 21375 | |
7ba99d21 | 21376 | for (auto &fe : lh->file_names ()) |
cb1df416 | 21377 | { |
804d2729 | 21378 | dwarf2_start_subfile (cu, fe.name, fe.include_dir (lh)); |
c24bdb02 | 21379 | if (builder->get_current_subfile ()->symtab == NULL) |
43f3e411 | 21380 | { |
c24bdb02 | 21381 | builder->get_current_subfile ()->symtab |
804d2729 | 21382 | = allocate_symtab (cust, |
c24bdb02 | 21383 | builder->get_current_subfile ()->name); |
43f3e411 | 21384 | } |
c24bdb02 | 21385 | fe.symtab = builder->get_current_subfile ()->symtab; |
cb1df416 DJ |
21386 | } |
21387 | } | |
c906108c SS |
21388 | } |
21389 | ||
21390 | /* Start a subfile for DWARF. FILENAME is the name of the file and | |
21391 | DIRNAME the name of the source directory which contains FILENAME | |
4d663531 | 21392 | or NULL if not known. |
c906108c SS |
21393 | This routine tries to keep line numbers from identical absolute and |
21394 | relative file names in a common subfile. | |
21395 | ||
21396 | Using the `list' example from the GDB testsuite, which resides in | |
21397 | /srcdir and compiling it with Irix6.2 cc in /compdir using a filename | |
21398 | of /srcdir/list0.c yields the following debugging information for list0.c: | |
21399 | ||
c5aa993b | 21400 | DW_AT_name: /srcdir/list0.c |
4d663531 | 21401 | DW_AT_comp_dir: /compdir |
357e46e7 | 21402 | files.files[0].name: list0.h |
c5aa993b | 21403 | files.files[0].dir: /srcdir |
357e46e7 | 21404 | files.files[1].name: list0.c |
c5aa993b | 21405 | files.files[1].dir: /srcdir |
c906108c SS |
21406 | |
21407 | The line number information for list0.c has to end up in a single | |
4f1520fb FR |
21408 | subfile, so that `break /srcdir/list0.c:1' works as expected. |
21409 | start_subfile will ensure that this happens provided that we pass the | |
21410 | concatenation of files.files[1].dir and files.files[1].name as the | |
21411 | subfile's name. */ | |
c906108c SS |
21412 | |
21413 | static void | |
804d2729 TT |
21414 | dwarf2_start_subfile (struct dwarf2_cu *cu, const char *filename, |
21415 | const char *dirname) | |
c906108c | 21416 | { |
43816ebc | 21417 | gdb::unique_xmalloc_ptr<char> copy; |
4f1520fb | 21418 | |
4d663531 | 21419 | /* In order not to lose the line information directory, |
4f1520fb FR |
21420 | we concatenate it to the filename when it makes sense. |
21421 | Note that the Dwarf3 standard says (speaking of filenames in line | |
21422 | information): ``The directory index is ignored for file names | |
21423 | that represent full path names''. Thus ignoring dirname in the | |
21424 | `else' branch below isn't an issue. */ | |
c906108c | 21425 | |
d5166ae1 | 21426 | if (!IS_ABSOLUTE_PATH (filename) && dirname != NULL) |
d521ce57 | 21427 | { |
43816ebc TT |
21428 | copy.reset (concat (dirname, SLASH_STRING, filename, (char *) NULL)); |
21429 | filename = copy.get (); | |
d521ce57 | 21430 | } |
c906108c | 21431 | |
c24bdb02 | 21432 | cu->get_builder ()->start_subfile (filename); |
c906108c SS |
21433 | } |
21434 | ||
4c2df51b DJ |
21435 | static void |
21436 | var_decode_location (struct attribute *attr, struct symbol *sym, | |
e7c27a73 | 21437 | struct dwarf2_cu *cu) |
4c2df51b | 21438 | { |
5e22e966 | 21439 | struct objfile *objfile = cu->per_objfile->objfile; |
e7c27a73 DJ |
21440 | struct comp_unit_head *cu_header = &cu->header; |
21441 | ||
4c2df51b DJ |
21442 | /* NOTE drow/2003-01-30: There used to be a comment and some special |
21443 | code here to turn a symbol with DW_AT_external and a | |
21444 | SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was | |
21445 | necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux | |
21446 | with some versions of binutils) where shared libraries could have | |
21447 | relocations against symbols in their debug information - the | |
21448 | minimal symbol would have the right address, but the debug info | |
21449 | would not. It's no longer necessary, because we will explicitly | |
21450 | apply relocations when we read in the debug information now. */ | |
21451 | ||
21452 | /* A DW_AT_location attribute with no contents indicates that a | |
21453 | variable has been optimized away. */ | |
9d2246fc | 21454 | if (attr->form_is_block () && attr->as_block ()->size == 0) |
4c2df51b | 21455 | { |
f1e6e072 | 21456 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
4c2df51b DJ |
21457 | return; |
21458 | } | |
21459 | ||
21460 | /* Handle one degenerate form of location expression specially, to | |
21461 | preserve GDB's previous behavior when section offsets are | |
336d760d AT |
21462 | specified. If this is just a DW_OP_addr, DW_OP_addrx, or |
21463 | DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */ | |
4c2df51b | 21464 | |
9d2246fc TT |
21465 | if (attr->form_is_block ()) |
21466 | { | |
21467 | struct dwarf_block *block = attr->as_block (); | |
21468 | ||
21469 | if ((block->data[0] == DW_OP_addr | |
21470 | && block->size == 1 + cu_header->addr_size) | |
21471 | || ((block->data[0] == DW_OP_GNU_addr_index | |
dda83cd7 | 21472 | || block->data[0] == DW_OP_addrx) |
9d2246fc TT |
21473 | && (block->size |
21474 | == 1 + leb128_size (&block->data[1])))) | |
21475 | { | |
21476 | unsigned int dummy; | |
21477 | ||
21478 | if (block->data[0] == DW_OP_addr) | |
21479 | SET_SYMBOL_VALUE_ADDRESS | |
21480 | (sym, cu->header.read_address (objfile->obfd, | |
21481 | block->data + 1, | |
38583298 | 21482 | &dummy)); |
9d2246fc TT |
21483 | else |
21484 | SET_SYMBOL_VALUE_ADDRESS | |
21485 | (sym, read_addr_index_from_leb128 (cu, block->data + 1, | |
21486 | &dummy)); | |
21487 | SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC; | |
21488 | fixup_symbol_section (sym, objfile); | |
21489 | SET_SYMBOL_VALUE_ADDRESS | |
21490 | (sym, | |
21491 | SYMBOL_VALUE_ADDRESS (sym) | |
a52d653e | 21492 | + objfile->section_offsets[sym->section_index ()]); |
9d2246fc TT |
21493 | return; |
21494 | } | |
4c2df51b DJ |
21495 | } |
21496 | ||
21497 | /* NOTE drow/2002-01-30: It might be worthwhile to have a static | |
21498 | expression evaluator, and use LOC_COMPUTED only when necessary | |
21499 | (i.e. when the value of a register or memory location is | |
21500 | referenced, or a thread-local block, etc.). Then again, it might | |
21501 | not be worthwhile. I'm assuming that it isn't unless performance | |
21502 | or memory numbers show me otherwise. */ | |
21503 | ||
f1e6e072 | 21504 | dwarf2_symbol_mark_computed (attr, sym, cu, 0); |
8be455d7 | 21505 | |
f1e6e072 | 21506 | if (SYMBOL_COMPUTED_OPS (sym)->location_has_loclist) |
9068261f | 21507 | cu->has_loclist = true; |
4c2df51b DJ |
21508 | } |
21509 | ||
c906108c SS |
21510 | /* Given a pointer to a DWARF information entry, figure out if we need |
21511 | to make a symbol table entry for it, and if so, create a new entry | |
21512 | and return a pointer to it. | |
21513 | If TYPE is NULL, determine symbol type from the die, otherwise | |
34eaf542 TT |
21514 | used the passed type. |
21515 | If SPACE is not NULL, use it to hold the new symbol. If it is | |
21516 | NULL, allocate a new symbol on the objfile's obstack. */ | |
c906108c SS |
21517 | |
21518 | static struct symbol * | |
5e2db402 TT |
21519 | new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
21520 | struct symbol *space) | |
c906108c | 21521 | { |
976ca316 SM |
21522 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
21523 | struct objfile *objfile = per_objfile->objfile; | |
08feed99 | 21524 | struct gdbarch *gdbarch = objfile->arch (); |
c906108c | 21525 | struct symbol *sym = NULL; |
15d034d0 | 21526 | const char *name; |
c906108c SS |
21527 | struct attribute *attr = NULL; |
21528 | struct attribute *attr2 = NULL; | |
e142c38c | 21529 | CORE_ADDR baseaddr; |
e37fd15a SW |
21530 | struct pending **list_to_add = NULL; |
21531 | ||
edb3359d | 21532 | int inlined_func = (die->tag == DW_TAG_inlined_subroutine); |
e142c38c | 21533 | |
b3b3bada | 21534 | baseaddr = objfile->text_section_offset (); |
c906108c | 21535 | |
94af9270 | 21536 | name = dwarf2_name (die, cu); |
c906108c SS |
21537 | if (name) |
21538 | { | |
34eaf542 | 21539 | int suppress_add = 0; |
94af9270 | 21540 | |
34eaf542 TT |
21541 | if (space) |
21542 | sym = space; | |
21543 | else | |
8c14c3a3 | 21544 | sym = new (&objfile->objfile_obstack) symbol; |
c906108c | 21545 | OBJSTAT (objfile, n_syms++); |
2de7ced7 DJ |
21546 | |
21547 | /* Cache this symbol's name and the name's demangled form (if any). */ | |
d3ecddab | 21548 | sym->set_language (cu->language, &objfile->objfile_obstack); |
f55ee35c JK |
21549 | /* Fortran does not have mangling standard and the mangling does differ |
21550 | between gfortran, iFort etc. */ | |
bcfe6157 TT |
21551 | const char *physname |
21552 | = (cu->language == language_fortran | |
21553 | ? dwarf2_full_name (name, die, cu) | |
21554 | : dwarf2_physname (name, die, cu)); | |
21555 | const char *linkagename = dw2_linkage_name (die, cu); | |
21556 | ||
21557 | if (linkagename == nullptr || cu->language == language_ada) | |
21558 | sym->set_linkage_name (physname); | |
21559 | else | |
21560 | { | |
21561 | sym->set_demangled_name (physname, &objfile->objfile_obstack); | |
21562 | sym->set_linkage_name (linkagename); | |
21563 | } | |
f55ee35c | 21564 | |
c906108c | 21565 | /* Default assumptions. |
dda83cd7 | 21566 | Use the passed type or decode it from the die. */ |
176620f1 | 21567 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
f1e6e072 | 21568 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; |
c906108c SS |
21569 | if (type != NULL) |
21570 | SYMBOL_TYPE (sym) = type; | |
21571 | else | |
e7c27a73 | 21572 | SYMBOL_TYPE (sym) = die_type (die, cu); |
edb3359d DJ |
21573 | attr = dwarf2_attr (die, |
21574 | inlined_func ? DW_AT_call_line : DW_AT_decl_line, | |
21575 | cu); | |
435d3d88 | 21576 | if (attr != nullptr) |
529908cb | 21577 | SYMBOL_LINE (sym) = attr->constant_value (0); |
cb1df416 | 21578 | |
edb3359d DJ |
21579 | attr = dwarf2_attr (die, |
21580 | inlined_func ? DW_AT_call_file : DW_AT_decl_file, | |
21581 | cu); | |
aa659cfa | 21582 | if (attr != nullptr && attr->is_nonnegative ()) |
cb1df416 | 21583 | { |
529908cb | 21584 | file_name_index file_index |
aa659cfa | 21585 | = (file_name_index) attr->as_nonnegative (); |
8c43009f | 21586 | struct file_entry *fe; |
9a619af0 | 21587 | |
ecfb656c PA |
21588 | if (cu->line_header != NULL) |
21589 | fe = cu->line_header->file_name_at (file_index); | |
8c43009f PA |
21590 | else |
21591 | fe = NULL; | |
21592 | ||
21593 | if (fe == NULL) | |
b98664d3 | 21594 | complaint (_("file index out of range")); |
8c43009f PA |
21595 | else |
21596 | symbol_set_symtab (sym, fe->symtab); | |
cb1df416 DJ |
21597 | } |
21598 | ||
c906108c SS |
21599 | switch (die->tag) |
21600 | { | |
21601 | case DW_TAG_label: | |
e142c38c | 21602 | attr = dwarf2_attr (die, DW_AT_low_pc, cu); |
435d3d88 | 21603 | if (attr != nullptr) |
3e29f34a MR |
21604 | { |
21605 | CORE_ADDR addr; | |
21606 | ||
95f982e5 | 21607 | addr = attr->as_address (); |
3e29f34a | 21608 | addr = gdbarch_adjust_dwarf2_addr (gdbarch, addr + baseaddr); |
38583298 | 21609 | SET_SYMBOL_VALUE_ADDRESS (sym, addr); |
8f5c6526 | 21610 | SYMBOL_ACLASS_INDEX (sym) = LOC_LABEL; |
3e29f34a | 21611 | } |
8f5c6526 TV |
21612 | else |
21613 | SYMBOL_ACLASS_INDEX (sym) = LOC_OPTIMIZED_OUT; | |
0f5238ed TT |
21614 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_core_addr; |
21615 | SYMBOL_DOMAIN (sym) = LABEL_DOMAIN; | |
d3cb6808 | 21616 | add_symbol_to_list (sym, cu->list_in_scope); |
c906108c SS |
21617 | break; |
21618 | case DW_TAG_subprogram: | |
21619 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21620 | finish_block. */ | |
f1e6e072 | 21621 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
e142c38c | 21622 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
c45bc3f8 | 21623 | if ((attr2 != nullptr && attr2->as_boolean ()) |
0a4b0913 AB |
21624 | || cu->language == language_ada |
21625 | || cu->language == language_fortran) | |
c906108c | 21626 | { |
dda83cd7 SM |
21627 | /* Subprograms marked external are stored as a global symbol. |
21628 | Ada and Fortran subprograms, whether marked external or | |
21629 | not, are always stored as a global symbol, because we want | |
21630 | to be able to access them globally. For instance, we want | |
21631 | to be able to break on a nested subprogram without having | |
21632 | to specify the context. */ | |
c24bdb02 | 21633 | list_to_add = cu->get_builder ()->get_global_symbols (); |
c906108c SS |
21634 | } |
21635 | else | |
21636 | { | |
e37fd15a | 21637 | list_to_add = cu->list_in_scope; |
c906108c SS |
21638 | } |
21639 | break; | |
edb3359d DJ |
21640 | case DW_TAG_inlined_subroutine: |
21641 | /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by | |
21642 | finish_block. */ | |
f1e6e072 | 21643 | SYMBOL_ACLASS_INDEX (sym) = LOC_BLOCK; |
edb3359d | 21644 | SYMBOL_INLINED (sym) = 1; |
481860b3 | 21645 | list_to_add = cu->list_in_scope; |
edb3359d | 21646 | break; |
34eaf542 TT |
21647 | case DW_TAG_template_value_param: |
21648 | suppress_add = 1; | |
21649 | /* Fall through. */ | |
72929c62 | 21650 | case DW_TAG_constant: |
c906108c | 21651 | case DW_TAG_variable: |
254e6b9e | 21652 | case DW_TAG_member: |
0963b4bd MS |
21653 | /* Compilation with minimal debug info may result in |
21654 | variables with missing type entries. Change the | |
21655 | misleading `void' type to something sensible. */ | |
78134374 | 21656 | if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_VOID) |
46a4882b | 21657 | SYMBOL_TYPE (sym) = objfile_type (objfile)->builtin_int; |
64c50499 | 21658 | |
e142c38c | 21659 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
254e6b9e DE |
21660 | /* In the case of DW_TAG_member, we should only be called for |
21661 | static const members. */ | |
21662 | if (die->tag == DW_TAG_member) | |
21663 | { | |
3863f96c DE |
21664 | /* dwarf2_add_field uses die_is_declaration, |
21665 | so we do the same. */ | |
254e6b9e DE |
21666 | gdb_assert (die_is_declaration (die, cu)); |
21667 | gdb_assert (attr); | |
21668 | } | |
435d3d88 | 21669 | if (attr != nullptr) |
c906108c | 21670 | { |
e7c27a73 | 21671 | dwarf2_const_value (attr, sym, cu); |
e142c38c | 21672 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
e37fd15a | 21673 | if (!suppress_add) |
34eaf542 | 21674 | { |
c45bc3f8 | 21675 | if (attr2 != nullptr && attr2->as_boolean ()) |
c24bdb02 | 21676 | list_to_add = cu->get_builder ()->get_global_symbols (); |
34eaf542 | 21677 | else |
e37fd15a | 21678 | list_to_add = cu->list_in_scope; |
34eaf542 | 21679 | } |
c906108c SS |
21680 | break; |
21681 | } | |
e142c38c | 21682 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 21683 | if (attr != nullptr) |
c906108c | 21684 | { |
e7c27a73 | 21685 | var_decode_location (attr, sym, cu); |
e142c38c | 21686 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
4357ac6c TT |
21687 | |
21688 | /* Fortran explicitly imports any global symbols to the local | |
21689 | scope by DW_TAG_common_block. */ | |
21690 | if (cu->language == language_fortran && die->parent | |
21691 | && die->parent->tag == DW_TAG_common_block) | |
21692 | attr2 = NULL; | |
21693 | ||
caac4577 JG |
21694 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21695 | && SYMBOL_VALUE_ADDRESS (sym) == 0 | |
976ca316 | 21696 | && !per_objfile->per_bfd->has_section_at_zero) |
caac4577 JG |
21697 | { |
21698 | /* When a static variable is eliminated by the linker, | |
21699 | the corresponding debug information is not stripped | |
21700 | out, but the variable address is set to null; | |
21701 | do not add such variables into symbol table. */ | |
21702 | } | |
c45bc3f8 | 21703 | else if (attr2 != nullptr && attr2->as_boolean ()) |
1c809c68 | 21704 | { |
4b610737 TT |
21705 | if (SYMBOL_CLASS (sym) == LOC_STATIC |
21706 | && (objfile->flags & OBJF_MAINLINE) == 0 | |
976ca316 | 21707 | && per_objfile->per_bfd->can_copy) |
4b610737 TT |
21708 | { |
21709 | /* A global static variable might be subject to | |
21710 | copy relocation. We first check for a local | |
21711 | minsym, though, because maybe the symbol was | |
21712 | marked hidden, in which case this would not | |
21713 | apply. */ | |
21714 | bound_minimal_symbol found | |
21715 | = (lookup_minimal_symbol_linkage | |
987012b8 | 21716 | (sym->linkage_name (), objfile)); |
4b610737 TT |
21717 | if (found.minsym != nullptr) |
21718 | sym->maybe_copied = 1; | |
21719 | } | |
f55ee35c | 21720 | |
1c809c68 TT |
21721 | /* A variable with DW_AT_external is never static, |
21722 | but it may be block-scoped. */ | |
804d2729 | 21723 | list_to_add |
c24bdb02 KS |
21724 | = ((cu->list_in_scope |
21725 | == cu->get_builder ()->get_file_symbols ()) | |
21726 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21727 | : cu->list_in_scope); |
1c809c68 | 21728 | } |
c906108c | 21729 | else |
e37fd15a | 21730 | list_to_add = cu->list_in_scope; |
c906108c SS |
21731 | } |
21732 | else | |
21733 | { | |
21734 | /* We do not know the address of this symbol. | |
dda83cd7 SM |
21735 | If it is an external symbol and we have type information |
21736 | for it, enter the symbol as a LOC_UNRESOLVED symbol. | |
21737 | The address of the variable will then be determined from | |
21738 | the minimal symbol table whenever the variable is | |
21739 | referenced. */ | |
e142c38c | 21740 | attr2 = dwarf2_attr (die, DW_AT_external, cu); |
0971de02 TT |
21741 | |
21742 | /* Fortran explicitly imports any global symbols to the local | |
21743 | scope by DW_TAG_common_block. */ | |
21744 | if (cu->language == language_fortran && die->parent | |
21745 | && die->parent->tag == DW_TAG_common_block) | |
21746 | { | |
21747 | /* SYMBOL_CLASS doesn't matter here because | |
21748 | read_common_block is going to reset it. */ | |
21749 | if (!suppress_add) | |
21750 | list_to_add = cu->list_in_scope; | |
21751 | } | |
c45bc3f8 | 21752 | else if (attr2 != nullptr && attr2->as_boolean () |
0971de02 | 21753 | && dwarf2_attr (die, DW_AT_type, cu) != NULL) |
c906108c | 21754 | { |
0fe7935b DJ |
21755 | /* A variable with DW_AT_external is never static, but it |
21756 | may be block-scoped. */ | |
804d2729 | 21757 | list_to_add |
c24bdb02 KS |
21758 | = ((cu->list_in_scope |
21759 | == cu->get_builder ()->get_file_symbols ()) | |
21760 | ? cu->get_builder ()->get_global_symbols () | |
804d2729 | 21761 | : cu->list_in_scope); |
0fe7935b | 21762 | |
f1e6e072 | 21763 | SYMBOL_ACLASS_INDEX (sym) = LOC_UNRESOLVED; |
c906108c | 21764 | } |
442ddf59 JK |
21765 | else if (!die_is_declaration (die, cu)) |
21766 | { | |
21767 | /* Use the default LOC_OPTIMIZED_OUT class. */ | |
21768 | gdb_assert (SYMBOL_CLASS (sym) == LOC_OPTIMIZED_OUT); | |
e37fd15a SW |
21769 | if (!suppress_add) |
21770 | list_to_add = cu->list_in_scope; | |
442ddf59 | 21771 | } |
c906108c SS |
21772 | } |
21773 | break; | |
21774 | case DW_TAG_formal_parameter: | |
a60f3166 | 21775 | { |
3db19b2d TV |
21776 | /* If we are inside a function, mark this as an argument. If |
21777 | not, we might be looking at an argument to an inlined function | |
21778 | when we do not have enough information to show inlined frames; | |
21779 | pretend it's a local variable in that case so that the user can | |
21780 | still see it. */ | |
21781 | struct context_stack *curr | |
21782 | = cu->get_builder ()->get_current_context_stack (); | |
21783 | if (curr != nullptr && curr->name != nullptr) | |
21784 | SYMBOL_IS_ARGUMENT (sym) = 1; | |
a60f3166 | 21785 | attr = dwarf2_attr (die, DW_AT_location, cu); |
435d3d88 | 21786 | if (attr != nullptr) |
a60f3166 TT |
21787 | { |
21788 | var_decode_location (attr, sym, cu); | |
21789 | } | |
21790 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
435d3d88 | 21791 | if (attr != nullptr) |
a60f3166 TT |
21792 | { |
21793 | dwarf2_const_value (attr, sym, cu); | |
21794 | } | |
f346a30d | 21795 | |
a60f3166 TT |
21796 | list_to_add = cu->list_in_scope; |
21797 | } | |
c906108c SS |
21798 | break; |
21799 | case DW_TAG_unspecified_parameters: | |
21800 | /* From varargs functions; gdb doesn't seem to have any | |
21801 | interest in this information, so just ignore it for now. | |
21802 | (FIXME?) */ | |
21803 | break; | |
34eaf542 TT |
21804 | case DW_TAG_template_type_param: |
21805 | suppress_add = 1; | |
21806 | /* Fall through. */ | |
c906108c | 21807 | case DW_TAG_class_type: |
680b30c7 | 21808 | case DW_TAG_interface_type: |
c906108c SS |
21809 | case DW_TAG_structure_type: |
21810 | case DW_TAG_union_type: | |
72019c9c | 21811 | case DW_TAG_set_type: |
c906108c | 21812 | case DW_TAG_enumeration_type: |
f1e6e072 | 21813 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21814 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c | 21815 | |
63d06c5c | 21816 | { |
9c37b5ae | 21817 | /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't |
63d06c5c DC |
21818 | really ever be static objects: otherwise, if you try |
21819 | to, say, break of a class's method and you're in a file | |
21820 | which doesn't mention that class, it won't work unless | |
21821 | the check for all static symbols in lookup_symbol_aux | |
21822 | saves you. See the OtherFileClass tests in | |
21823 | gdb.c++/namespace.exp. */ | |
21824 | ||
e37fd15a | 21825 | if (!suppress_add) |
34eaf542 | 21826 | { |
c24bdb02 | 21827 | buildsym_compunit *builder = cu->get_builder (); |
804d2729 | 21828 | list_to_add |
c24bdb02 | 21829 | = (cu->list_in_scope == builder->get_file_symbols () |
804d2729 | 21830 | && cu->language == language_cplus |
c24bdb02 | 21831 | ? builder->get_global_symbols () |
804d2729 | 21832 | : cu->list_in_scope); |
63d06c5c | 21833 | |
64382290 | 21834 | /* The semantics of C++ state that "struct foo { |
9c37b5ae | 21835 | ... }" also defines a typedef for "foo". */ |
64382290 | 21836 | if (cu->language == language_cplus |
45280282 | 21837 | || cu->language == language_ada |
c44af4eb TT |
21838 | || cu->language == language_d |
21839 | || cu->language == language_rust) | |
64382290 TT |
21840 | { |
21841 | /* The symbol's name is already allocated along | |
21842 | with this objfile, so we don't need to | |
21843 | duplicate it for the type. */ | |
7d93a1e0 | 21844 | if (SYMBOL_TYPE (sym)->name () == 0) |
d0e39ea2 | 21845 | SYMBOL_TYPE (sym)->set_name (sym->search_name ()); |
64382290 | 21846 | } |
63d06c5c DC |
21847 | } |
21848 | } | |
c906108c SS |
21849 | break; |
21850 | case DW_TAG_typedef: | |
f1e6e072 | 21851 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
63d06c5c | 21852 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21853 | list_to_add = cu->list_in_scope; |
63d06c5c | 21854 | break; |
d8f62e84 | 21855 | case DW_TAG_array_type: |
c906108c | 21856 | case DW_TAG_base_type: |
dda83cd7 | 21857 | case DW_TAG_subrange_type: |
f1e6e072 | 21858 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
176620f1 | 21859 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
e37fd15a | 21860 | list_to_add = cu->list_in_scope; |
c906108c SS |
21861 | break; |
21862 | case DW_TAG_enumerator: | |
e142c38c | 21863 | attr = dwarf2_attr (die, DW_AT_const_value, cu); |
435d3d88 | 21864 | if (attr != nullptr) |
c906108c | 21865 | { |
e7c27a73 | 21866 | dwarf2_const_value (attr, sym, cu); |
c906108c | 21867 | } |
63d06c5c DC |
21868 | { |
21869 | /* NOTE: carlton/2003-11-10: See comment above in the | |
21870 | DW_TAG_class_type, etc. block. */ | |
21871 | ||
804d2729 | 21872 | list_to_add |
c24bdb02 | 21873 | = (cu->list_in_scope == cu->get_builder ()->get_file_symbols () |
804d2729 | 21874 | && cu->language == language_cplus |
c24bdb02 | 21875 | ? cu->get_builder ()->get_global_symbols () |
804d2729 | 21876 | : cu->list_in_scope); |
63d06c5c | 21877 | } |
c906108c | 21878 | break; |
74921315 | 21879 | case DW_TAG_imported_declaration: |
5c4e30ca | 21880 | case DW_TAG_namespace: |
f1e6e072 | 21881 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; |
c24bdb02 | 21882 | list_to_add = cu->get_builder ()->get_global_symbols (); |
5c4e30ca | 21883 | break; |
530e8392 KB |
21884 | case DW_TAG_module: |
21885 | SYMBOL_ACLASS_INDEX (sym) = LOC_TYPEDEF; | |
21886 | SYMBOL_DOMAIN (sym) = MODULE_DOMAIN; | |
c24bdb02 | 21887 | list_to_add = cu->get_builder ()->get_global_symbols (); |
530e8392 | 21888 | break; |
4357ac6c | 21889 | case DW_TAG_common_block: |
f1e6e072 | 21890 | SYMBOL_ACLASS_INDEX (sym) = LOC_COMMON_BLOCK; |
4357ac6c | 21891 | SYMBOL_DOMAIN (sym) = COMMON_BLOCK_DOMAIN; |
d3cb6808 | 21892 | add_symbol_to_list (sym, cu->list_in_scope); |
4357ac6c | 21893 | break; |
c906108c SS |
21894 | default: |
21895 | /* Not a tag we recognize. Hopefully we aren't processing | |
21896 | trash data, but since we must specifically ignore things | |
21897 | we don't recognize, there is nothing else we should do at | |
0963b4bd | 21898 | this point. */ |
b98664d3 | 21899 | complaint (_("unsupported tag: '%s'"), |
4d3c2250 | 21900 | dwarf_tag_name (die->tag)); |
c906108c SS |
21901 | break; |
21902 | } | |
df8a16a1 | 21903 | |
e37fd15a SW |
21904 | if (suppress_add) |
21905 | { | |
21906 | sym->hash_next = objfile->template_symbols; | |
21907 | objfile->template_symbols = sym; | |
21908 | list_to_add = NULL; | |
21909 | } | |
21910 | ||
21911 | if (list_to_add != NULL) | |
d3cb6808 | 21912 | add_symbol_to_list (sym, list_to_add); |
e37fd15a | 21913 | |
df8a16a1 DJ |
21914 | /* For the benefit of old versions of GCC, check for anonymous |
21915 | namespaces based on the demangled name. */ | |
4d4ec4e5 | 21916 | if (!cu->processing_has_namespace_info |
94af9270 | 21917 | && cu->language == language_cplus) |
c24bdb02 | 21918 | cp_scan_for_anonymous_namespaces (cu->get_builder (), sym, objfile); |
c906108c SS |
21919 | } |
21920 | return (sym); | |
21921 | } | |
21922 | ||
98bfdba5 PA |
21923 | /* Given an attr with a DW_FORM_dataN value in host byte order, |
21924 | zero-extend it as appropriate for the symbol's type. The DWARF | |
21925 | standard (v4) is not entirely clear about the meaning of using | |
21926 | DW_FORM_dataN for a constant with a signed type, where the type is | |
21927 | wider than the data. The conclusion of a discussion on the DWARF | |
21928 | list was that this is unspecified. We choose to always zero-extend | |
21929 | because that is the interpretation long in use by GCC. */ | |
c906108c | 21930 | |
98bfdba5 | 21931 | static gdb_byte * |
ff39bb5e | 21932 | dwarf2_const_value_data (const struct attribute *attr, struct obstack *obstack, |
12df843f | 21933 | struct dwarf2_cu *cu, LONGEST *value, int bits) |
c906108c | 21934 | { |
5e22e966 | 21935 | struct objfile *objfile = cu->per_objfile->objfile; |
e17a4113 UW |
21936 | enum bfd_endian byte_order = bfd_big_endian (objfile->obfd) ? |
21937 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE; | |
529908cb | 21938 | LONGEST l = attr->constant_value (0); |
98bfdba5 PA |
21939 | |
21940 | if (bits < sizeof (*value) * 8) | |
21941 | { | |
21942 | l &= ((LONGEST) 1 << bits) - 1; | |
21943 | *value = l; | |
21944 | } | |
21945 | else if (bits == sizeof (*value) * 8) | |
21946 | *value = l; | |
21947 | else | |
21948 | { | |
224c3ddb | 21949 | gdb_byte *bytes = (gdb_byte *) obstack_alloc (obstack, bits / 8); |
98bfdba5 PA |
21950 | store_unsigned_integer (bytes, bits / 8, byte_order, l); |
21951 | return bytes; | |
21952 | } | |
21953 | ||
21954 | return NULL; | |
21955 | } | |
21956 | ||
21957 | /* Read a constant value from an attribute. Either set *VALUE, or if | |
21958 | the value does not fit in *VALUE, set *BYTES - either already | |
21959 | allocated on the objfile obstack, or newly allocated on OBSTACK, | |
21960 | or, set *BATON, if we translated the constant to a location | |
21961 | expression. */ | |
21962 | ||
21963 | static void | |
ff39bb5e | 21964 | dwarf2_const_value_attr (const struct attribute *attr, struct type *type, |
98bfdba5 PA |
21965 | const char *name, struct obstack *obstack, |
21966 | struct dwarf2_cu *cu, | |
d521ce57 | 21967 | LONGEST *value, const gdb_byte **bytes, |
98bfdba5 PA |
21968 | struct dwarf2_locexpr_baton **baton) |
21969 | { | |
5e22e966 | 21970 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
a50264ba | 21971 | struct objfile *objfile = per_objfile->objfile; |
98bfdba5 | 21972 | struct comp_unit_head *cu_header = &cu->header; |
c906108c | 21973 | struct dwarf_block *blk; |
98bfdba5 PA |
21974 | enum bfd_endian byte_order = (bfd_big_endian (objfile->obfd) ? |
21975 | BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); | |
21976 | ||
21977 | *value = 0; | |
21978 | *bytes = NULL; | |
21979 | *baton = NULL; | |
c906108c SS |
21980 | |
21981 | switch (attr->form) | |
21982 | { | |
21983 | case DW_FORM_addr: | |
336d760d | 21984 | case DW_FORM_addrx: |
3019eac3 | 21985 | case DW_FORM_GNU_addr_index: |
ac56253d | 21986 | { |
ac56253d TT |
21987 | gdb_byte *data; |
21988 | ||
98bfdba5 PA |
21989 | if (TYPE_LENGTH (type) != cu_header->addr_size) |
21990 | dwarf2_const_value_length_mismatch_complaint (name, | |
ac56253d | 21991 | cu_header->addr_size, |
98bfdba5 | 21992 | TYPE_LENGTH (type)); |
ac56253d TT |
21993 | /* Symbols of this form are reasonably rare, so we just |
21994 | piggyback on the existing location code rather than writing | |
21995 | a new implementation of symbol_computed_ops. */ | |
8d749320 | 21996 | *baton = XOBNEW (obstack, struct dwarf2_locexpr_baton); |
a50264ba | 21997 | (*baton)->per_objfile = per_objfile; |
98bfdba5 PA |
21998 | (*baton)->per_cu = cu->per_cu; |
21999 | gdb_assert ((*baton)->per_cu); | |
ac56253d | 22000 | |
98bfdba5 | 22001 | (*baton)->size = 2 + cu_header->addr_size; |
224c3ddb | 22002 | data = (gdb_byte *) obstack_alloc (obstack, (*baton)->size); |
98bfdba5 | 22003 | (*baton)->data = data; |
ac56253d TT |
22004 | |
22005 | data[0] = DW_OP_addr; | |
22006 | store_unsigned_integer (&data[1], cu_header->addr_size, | |
36d378cf | 22007 | byte_order, attr->as_address ()); |
ac56253d | 22008 | data[cu_header->addr_size + 1] = DW_OP_stack_value; |
ac56253d | 22009 | } |
c906108c | 22010 | break; |
4ac36638 | 22011 | case DW_FORM_string: |
93b5768b | 22012 | case DW_FORM_strp: |
cf532bd1 | 22013 | case DW_FORM_strx: |
3019eac3 | 22014 | case DW_FORM_GNU_str_index: |
36586728 | 22015 | case DW_FORM_GNU_strp_alt: |
c6481205 | 22016 | /* The string is already allocated on the objfile obstack, point |
98bfdba5 | 22017 | directly to it. */ |
2c830f54 | 22018 | *bytes = (const gdb_byte *) attr->as_string (); |
93b5768b | 22019 | break; |
c906108c SS |
22020 | case DW_FORM_block1: |
22021 | case DW_FORM_block2: | |
22022 | case DW_FORM_block4: | |
22023 | case DW_FORM_block: | |
2dc7f7b3 | 22024 | case DW_FORM_exprloc: |
0224619f | 22025 | case DW_FORM_data16: |
9d2246fc | 22026 | blk = attr->as_block (); |
98bfdba5 PA |
22027 | if (TYPE_LENGTH (type) != blk->size) |
22028 | dwarf2_const_value_length_mismatch_complaint (name, blk->size, | |
22029 | TYPE_LENGTH (type)); | |
22030 | *bytes = blk->data; | |
c906108c | 22031 | break; |
2df3850c JM |
22032 | |
22033 | /* The DW_AT_const_value attributes are supposed to carry the | |
22034 | symbol's value "represented as it would be on the target | |
22035 | architecture." By the time we get here, it's already been | |
22036 | converted to host endianness, so we just need to sign- or | |
22037 | zero-extend it as appropriate. */ | |
22038 | case DW_FORM_data1: | |
3aef2284 | 22039 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 8); |
2df3850c | 22040 | break; |
c906108c | 22041 | case DW_FORM_data2: |
3aef2284 | 22042 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 16); |
2df3850c | 22043 | break; |
c906108c | 22044 | case DW_FORM_data4: |
3aef2284 | 22045 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 32); |
2df3850c | 22046 | break; |
c906108c | 22047 | case DW_FORM_data8: |
3aef2284 | 22048 | *bytes = dwarf2_const_value_data (attr, obstack, cu, value, 64); |
2df3850c JM |
22049 | break; |
22050 | ||
c906108c | 22051 | case DW_FORM_sdata: |
663c44ac | 22052 | case DW_FORM_implicit_const: |
1bc397c5 | 22053 | *value = attr->as_signed (); |
2df3850c JM |
22054 | break; |
22055 | ||
c906108c | 22056 | case DW_FORM_udata: |
529908cb | 22057 | *value = attr->as_unsigned (); |
c906108c | 22058 | break; |
2df3850c | 22059 | |
c906108c | 22060 | default: |
b98664d3 | 22061 | complaint (_("unsupported const value attribute form: '%s'"), |
4d3c2250 | 22062 | dwarf_form_name (attr->form)); |
98bfdba5 | 22063 | *value = 0; |
c906108c SS |
22064 | break; |
22065 | } | |
22066 | } | |
22067 | ||
2df3850c | 22068 | |
98bfdba5 PA |
22069 | /* Copy constant value from an attribute to a symbol. */ |
22070 | ||
2df3850c | 22071 | static void |
ff39bb5e | 22072 | dwarf2_const_value (const struct attribute *attr, struct symbol *sym, |
98bfdba5 | 22073 | struct dwarf2_cu *cu) |
2df3850c | 22074 | { |
5e22e966 | 22075 | struct objfile *objfile = cu->per_objfile->objfile; |
12df843f | 22076 | LONGEST value; |
d521ce57 | 22077 | const gdb_byte *bytes; |
98bfdba5 | 22078 | struct dwarf2_locexpr_baton *baton; |
2df3850c | 22079 | |
98bfdba5 | 22080 | dwarf2_const_value_attr (attr, SYMBOL_TYPE (sym), |
987012b8 | 22081 | sym->print_name (), |
98bfdba5 PA |
22082 | &objfile->objfile_obstack, cu, |
22083 | &value, &bytes, &baton); | |
2df3850c | 22084 | |
98bfdba5 PA |
22085 | if (baton != NULL) |
22086 | { | |
98bfdba5 | 22087 | SYMBOL_LOCATION_BATON (sym) = baton; |
f1e6e072 | 22088 | SYMBOL_ACLASS_INDEX (sym) = dwarf2_locexpr_index; |
98bfdba5 PA |
22089 | } |
22090 | else if (bytes != NULL) | |
22091 | { | |
22092 | SYMBOL_VALUE_BYTES (sym) = bytes; | |
f1e6e072 | 22093 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST_BYTES; |
98bfdba5 PA |
22094 | } |
22095 | else | |
22096 | { | |
22097 | SYMBOL_VALUE (sym) = value; | |
f1e6e072 | 22098 | SYMBOL_ACLASS_INDEX (sym) = LOC_CONST; |
98bfdba5 | 22099 | } |
2df3850c JM |
22100 | } |
22101 | ||
c906108c SS |
22102 | /* Return the type of the die in question using its DW_AT_type attribute. */ |
22103 | ||
22104 | static struct type * | |
e7c27a73 | 22105 | die_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22106 | { |
c906108c | 22107 | struct attribute *type_attr; |
c906108c | 22108 | |
e142c38c | 22109 | type_attr = dwarf2_attr (die, DW_AT_type, cu); |
c906108c SS |
22110 | if (!type_attr) |
22111 | { | |
5e22e966 | 22112 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 22113 | /* A missing DW_AT_type represents a void type. */ |
518817b3 | 22114 | return objfile_type (objfile)->builtin_void; |
c906108c | 22115 | } |
348e048f | 22116 | |
673bfd45 | 22117 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22118 | } |
22119 | ||
b4ba55a1 JB |
22120 | /* True iff CU's producer generates GNAT Ada auxiliary information |
22121 | that allows to find parallel types through that information instead | |
22122 | of having to do expensive parallel lookups by type name. */ | |
22123 | ||
22124 | static int | |
22125 | need_gnat_info (struct dwarf2_cu *cu) | |
22126 | { | |
de4cb04a JB |
22127 | /* Assume that the Ada compiler was GNAT, which always produces |
22128 | the auxiliary information. */ | |
22129 | return (cu->language == language_ada); | |
b4ba55a1 JB |
22130 | } |
22131 | ||
b4ba55a1 JB |
22132 | /* Return the auxiliary type of the die in question using its |
22133 | DW_AT_GNAT_descriptive_type attribute. Returns NULL if the | |
22134 | attribute is not present. */ | |
22135 | ||
22136 | static struct type * | |
22137 | die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu) | |
22138 | { | |
b4ba55a1 | 22139 | struct attribute *type_attr; |
b4ba55a1 JB |
22140 | |
22141 | type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu); | |
22142 | if (!type_attr) | |
22143 | return NULL; | |
22144 | ||
673bfd45 | 22145 | return lookup_die_type (die, type_attr, cu); |
b4ba55a1 JB |
22146 | } |
22147 | ||
22148 | /* If DIE has a descriptive_type attribute, then set the TYPE's | |
22149 | descriptive type accordingly. */ | |
22150 | ||
22151 | static void | |
22152 | set_descriptive_type (struct type *type, struct die_info *die, | |
22153 | struct dwarf2_cu *cu) | |
22154 | { | |
22155 | struct type *descriptive_type = die_descriptive_type (die, cu); | |
22156 | ||
22157 | if (descriptive_type) | |
22158 | { | |
22159 | ALLOCATE_GNAT_AUX_TYPE (type); | |
22160 | TYPE_DESCRIPTIVE_TYPE (type) = descriptive_type; | |
22161 | } | |
22162 | } | |
22163 | ||
c906108c SS |
22164 | /* Return the containing type of the die in question using its |
22165 | DW_AT_containing_type attribute. */ | |
22166 | ||
22167 | static struct type * | |
e7c27a73 | 22168 | die_containing_type (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22169 | { |
c906108c | 22170 | struct attribute *type_attr; |
5e22e966 | 22171 | struct objfile *objfile = cu->per_objfile->objfile; |
c906108c | 22172 | |
e142c38c | 22173 | type_attr = dwarf2_attr (die, DW_AT_containing_type, cu); |
33ac96f0 JK |
22174 | if (!type_attr) |
22175 | error (_("Dwarf Error: Problem turning containing type into gdb type " | |
518817b3 | 22176 | "[in module %s]"), objfile_name (objfile)); |
33ac96f0 | 22177 | |
673bfd45 | 22178 | return lookup_die_type (die, type_attr, cu); |
c906108c SS |
22179 | } |
22180 | ||
ac9ec31b DE |
22181 | /* Return an error marker type to use for the ill formed type in DIE/CU. */ |
22182 | ||
22183 | static struct type * | |
22184 | build_error_marker_type (struct dwarf2_cu *cu, struct die_info *die) | |
22185 | { | |
976ca316 SM |
22186 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
22187 | struct objfile *objfile = per_objfile->objfile; | |
528e1572 | 22188 | char *saved; |
ac9ec31b | 22189 | |
528e1572 SM |
22190 | std::string message |
22191 | = string_printf (_("<unknown type in %s, CU %s, DIE %s>"), | |
22192 | objfile_name (objfile), | |
22193 | sect_offset_str (cu->header.sect_off), | |
22194 | sect_offset_str (die->sect_off)); | |
efba19b0 | 22195 | saved = obstack_strdup (&objfile->objfile_obstack, message); |
ac9ec31b | 22196 | |
19f392bc | 22197 | return init_type (objfile, TYPE_CODE_ERROR, 0, saved); |
ac9ec31b DE |
22198 | } |
22199 | ||
673bfd45 | 22200 | /* Look up the type of DIE in CU using its type attribute ATTR. |
ac9ec31b DE |
22201 | ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type, |
22202 | DW_AT_containing_type. | |
673bfd45 DE |
22203 | If there is no type substitute an error marker. */ |
22204 | ||
c906108c | 22205 | static struct type * |
ff39bb5e | 22206 | lookup_die_type (struct die_info *die, const struct attribute *attr, |
673bfd45 | 22207 | struct dwarf2_cu *cu) |
c906108c | 22208 | { |
976ca316 SM |
22209 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
22210 | struct objfile *objfile = per_objfile->objfile; | |
f792889a DJ |
22211 | struct type *this_type; |
22212 | ||
ac9ec31b DE |
22213 | gdb_assert (attr->name == DW_AT_type |
22214 | || attr->name == DW_AT_GNAT_descriptive_type | |
22215 | || attr->name == DW_AT_containing_type); | |
22216 | ||
673bfd45 DE |
22217 | /* First see if we have it cached. */ |
22218 | ||
36586728 TT |
22219 | if (attr->form == DW_FORM_GNU_ref_alt) |
22220 | { | |
22221 | struct dwarf2_per_cu_data *per_cu; | |
0826b30a | 22222 | sect_offset sect_off = attr->get_ref_die_offset (); |
36586728 | 22223 | |
976ca316 SM |
22224 | per_cu = dwarf2_find_containing_comp_unit (sect_off, 1, per_objfile); |
22225 | this_type = get_die_type_at_offset (sect_off, per_cu, per_objfile); | |
36586728 | 22226 | } |
cd6c91b4 | 22227 | else if (attr->form_is_ref ()) |
673bfd45 | 22228 | { |
0826b30a | 22229 | sect_offset sect_off = attr->get_ref_die_offset (); |
673bfd45 | 22230 | |
976ca316 | 22231 | this_type = get_die_type_at_offset (sect_off, cu->per_cu, per_objfile); |
673bfd45 | 22232 | } |
55f1336d | 22233 | else if (attr->form == DW_FORM_ref_sig8) |
673bfd45 | 22234 | { |
630ed6b9 | 22235 | ULONGEST signature = attr->as_signature (); |
673bfd45 | 22236 | |
ac9ec31b | 22237 | return get_signatured_type (die, signature, cu); |
673bfd45 DE |
22238 | } |
22239 | else | |
22240 | { | |
b98664d3 | 22241 | complaint (_("Dwarf Error: Bad type attribute %s in DIE" |
9d8780f0 SM |
22242 | " at %s [in module %s]"), |
22243 | dwarf_attr_name (attr->name), sect_offset_str (die->sect_off), | |
4262abfb | 22244 | objfile_name (objfile)); |
ac9ec31b | 22245 | return build_error_marker_type (cu, die); |
673bfd45 DE |
22246 | } |
22247 | ||
22248 | /* If not cached we need to read it in. */ | |
22249 | ||
22250 | if (this_type == NULL) | |
22251 | { | |
ac9ec31b | 22252 | struct die_info *type_die = NULL; |
673bfd45 DE |
22253 | struct dwarf2_cu *type_cu = cu; |
22254 | ||
cd6c91b4 | 22255 | if (attr->form_is_ref ()) |
ac9ec31b DE |
22256 | type_die = follow_die_ref (die, attr, &type_cu); |
22257 | if (type_die == NULL) | |
22258 | return build_error_marker_type (cu, die); | |
22259 | /* If we find the type now, it's probably because the type came | |
3019eac3 DE |
22260 | from an inter-CU reference and the type's CU got expanded before |
22261 | ours. */ | |
ac9ec31b | 22262 | this_type = read_type_die (type_die, type_cu); |
673bfd45 DE |
22263 | } |
22264 | ||
22265 | /* If we still don't have a type use an error marker. */ | |
22266 | ||
22267 | if (this_type == NULL) | |
ac9ec31b | 22268 | return build_error_marker_type (cu, die); |
673bfd45 | 22269 | |
f792889a | 22270 | return this_type; |
c906108c SS |
22271 | } |
22272 | ||
673bfd45 DE |
22273 | /* Return the type in DIE, CU. |
22274 | Returns NULL for invalid types. | |
22275 | ||
02142a6c | 22276 | This first does a lookup in die_type_hash, |
673bfd45 DE |
22277 | and only reads the die in if necessary. |
22278 | ||
22279 | NOTE: This can be called when reading in partial or full symbols. */ | |
22280 | ||
f792889a | 22281 | static struct type * |
e7c27a73 | 22282 | read_type_die (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 22283 | { |
f792889a DJ |
22284 | struct type *this_type; |
22285 | ||
22286 | this_type = get_die_type (die, cu); | |
22287 | if (this_type) | |
22288 | return this_type; | |
22289 | ||
673bfd45 DE |
22290 | return read_type_die_1 (die, cu); |
22291 | } | |
22292 | ||
22293 | /* Read the type in DIE, CU. | |
22294 | Returns NULL for invalid types. */ | |
22295 | ||
22296 | static struct type * | |
22297 | read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu) | |
22298 | { | |
22299 | struct type *this_type = NULL; | |
22300 | ||
c906108c SS |
22301 | switch (die->tag) |
22302 | { | |
22303 | case DW_TAG_class_type: | |
680b30c7 | 22304 | case DW_TAG_interface_type: |
c906108c SS |
22305 | case DW_TAG_structure_type: |
22306 | case DW_TAG_union_type: | |
f792889a | 22307 | this_type = read_structure_type (die, cu); |
c906108c SS |
22308 | break; |
22309 | case DW_TAG_enumeration_type: | |
f792889a | 22310 | this_type = read_enumeration_type (die, cu); |
c906108c SS |
22311 | break; |
22312 | case DW_TAG_subprogram: | |
22313 | case DW_TAG_subroutine_type: | |
edb3359d | 22314 | case DW_TAG_inlined_subroutine: |
f792889a | 22315 | this_type = read_subroutine_type (die, cu); |
c906108c SS |
22316 | break; |
22317 | case DW_TAG_array_type: | |
f792889a | 22318 | this_type = read_array_type (die, cu); |
c906108c | 22319 | break; |
72019c9c | 22320 | case DW_TAG_set_type: |
f792889a | 22321 | this_type = read_set_type (die, cu); |
72019c9c | 22322 | break; |
c906108c | 22323 | case DW_TAG_pointer_type: |
f792889a | 22324 | this_type = read_tag_pointer_type (die, cu); |
c906108c SS |
22325 | break; |
22326 | case DW_TAG_ptr_to_member_type: | |
f792889a | 22327 | this_type = read_tag_ptr_to_member_type (die, cu); |
c906108c SS |
22328 | break; |
22329 | case DW_TAG_reference_type: | |
4297a3f0 AV |
22330 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_REF); |
22331 | break; | |
22332 | case DW_TAG_rvalue_reference_type: | |
22333 | this_type = read_tag_reference_type (die, cu, TYPE_CODE_RVALUE_REF); | |
c906108c SS |
22334 | break; |
22335 | case DW_TAG_const_type: | |
f792889a | 22336 | this_type = read_tag_const_type (die, cu); |
c906108c SS |
22337 | break; |
22338 | case DW_TAG_volatile_type: | |
f792889a | 22339 | this_type = read_tag_volatile_type (die, cu); |
c906108c | 22340 | break; |
06d66ee9 TT |
22341 | case DW_TAG_restrict_type: |
22342 | this_type = read_tag_restrict_type (die, cu); | |
22343 | break; | |
c906108c | 22344 | case DW_TAG_string_type: |
f792889a | 22345 | this_type = read_tag_string_type (die, cu); |
c906108c SS |
22346 | break; |
22347 | case DW_TAG_typedef: | |
f792889a | 22348 | this_type = read_typedef (die, cu); |
c906108c | 22349 | break; |
a02abb62 | 22350 | case DW_TAG_subrange_type: |
f792889a | 22351 | this_type = read_subrange_type (die, cu); |
a02abb62 | 22352 | break; |
c906108c | 22353 | case DW_TAG_base_type: |
f792889a | 22354 | this_type = read_base_type (die, cu); |
c906108c | 22355 | break; |
81a17f79 | 22356 | case DW_TAG_unspecified_type: |
f792889a | 22357 | this_type = read_unspecified_type (die, cu); |
81a17f79 | 22358 | break; |
0114d602 DJ |
22359 | case DW_TAG_namespace: |
22360 | this_type = read_namespace_type (die, cu); | |
22361 | break; | |
f55ee35c JK |
22362 | case DW_TAG_module: |
22363 | this_type = read_module_type (die, cu); | |
22364 | break; | |
a2c2acaf MW |
22365 | case DW_TAG_atomic_type: |
22366 | this_type = read_tag_atomic_type (die, cu); | |
22367 | break; | |
c906108c | 22368 | default: |
b98664d3 | 22369 | complaint (_("unexpected tag in read_type_die: '%s'"), |
4d3c2250 | 22370 | dwarf_tag_name (die->tag)); |
c906108c SS |
22371 | break; |
22372 | } | |
63d06c5c | 22373 | |
f792889a | 22374 | return this_type; |
63d06c5c DC |
22375 | } |
22376 | ||
abc72ce4 DE |
22377 | /* See if we can figure out if the class lives in a namespace. We do |
22378 | this by looking for a member function; its demangled name will | |
22379 | contain namespace info, if there is any. | |
22380 | Return the computed name or NULL. | |
22381 | Space for the result is allocated on the objfile's obstack. | |
22382 | This is the full-die version of guess_partial_die_structure_name. | |
22383 | In this case we know DIE has no useful parent. */ | |
22384 | ||
43816ebc | 22385 | static const char * |
abc72ce4 DE |
22386 | guess_full_die_structure_name (struct die_info *die, struct dwarf2_cu *cu) |
22387 | { | |
22388 | struct die_info *spec_die; | |
22389 | struct dwarf2_cu *spec_cu; | |
22390 | struct die_info *child; | |
5e22e966 | 22391 | struct objfile *objfile = cu->per_objfile->objfile; |
abc72ce4 DE |
22392 | |
22393 | spec_cu = cu; | |
22394 | spec_die = die_specification (die, &spec_cu); | |
22395 | if (spec_die != NULL) | |
22396 | { | |
22397 | die = spec_die; | |
22398 | cu = spec_cu; | |
22399 | } | |
22400 | ||
22401 | for (child = die->child; | |
22402 | child != NULL; | |
22403 | child = child->sibling) | |
22404 | { | |
22405 | if (child->tag == DW_TAG_subprogram) | |
22406 | { | |
73b9be8b | 22407 | const char *linkage_name = dw2_linkage_name (child, cu); |
abc72ce4 | 22408 | |
7d45c7c3 | 22409 | if (linkage_name != NULL) |
abc72ce4 | 22410 | { |
43816ebc | 22411 | gdb::unique_xmalloc_ptr<char> actual_name |
eff93b4d | 22412 | (cu->language_defn->class_name_from_physname (linkage_name)); |
43816ebc | 22413 | const char *name = NULL; |
abc72ce4 DE |
22414 | |
22415 | if (actual_name != NULL) | |
22416 | { | |
15d034d0 | 22417 | const char *die_name = dwarf2_name (die, cu); |
abc72ce4 DE |
22418 | |
22419 | if (die_name != NULL | |
43816ebc | 22420 | && strcmp (die_name, actual_name.get ()) != 0) |
abc72ce4 DE |
22421 | { |
22422 | /* Strip off the class name from the full name. | |
22423 | We want the prefix. */ | |
22424 | int die_name_len = strlen (die_name); | |
43816ebc TT |
22425 | int actual_name_len = strlen (actual_name.get ()); |
22426 | const char *ptr = actual_name.get (); | |
abc72ce4 DE |
22427 | |
22428 | /* Test for '::' as a sanity check. */ | |
22429 | if (actual_name_len > die_name_len + 2 | |
43816ebc | 22430 | && ptr[actual_name_len - die_name_len - 1] == ':') |
0cf9feb9 | 22431 | name = obstack_strndup ( |
e3b94546 | 22432 | &objfile->per_bfd->storage_obstack, |
43816ebc | 22433 | ptr, actual_name_len - die_name_len - 2); |
abc72ce4 DE |
22434 | } |
22435 | } | |
abc72ce4 DE |
22436 | return name; |
22437 | } | |
22438 | } | |
22439 | } | |
22440 | ||
22441 | return NULL; | |
22442 | } | |
22443 | ||
96408a79 SA |
22444 | /* GCC might emit a nameless typedef that has a linkage name. Determine the |
22445 | prefix part in such case. See | |
22446 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
22447 | ||
a121b7c1 | 22448 | static const char * |
96408a79 SA |
22449 | anonymous_struct_prefix (struct die_info *die, struct dwarf2_cu *cu) |
22450 | { | |
22451 | struct attribute *attr; | |
e6a959d6 | 22452 | const char *base; |
96408a79 SA |
22453 | |
22454 | if (die->tag != DW_TAG_class_type && die->tag != DW_TAG_interface_type | |
22455 | && die->tag != DW_TAG_structure_type && die->tag != DW_TAG_union_type) | |
22456 | return NULL; | |
22457 | ||
7d45c7c3 | 22458 | if (dwarf2_string_attr (die, DW_AT_name, cu) != NULL) |
96408a79 SA |
22459 | return NULL; |
22460 | ||
73b9be8b | 22461 | attr = dw2_linkage_name_attr (die, cu); |
2c830f54 TT |
22462 | const char *attr_name = attr->as_string (); |
22463 | if (attr == NULL || attr_name == NULL) | |
96408a79 SA |
22464 | return NULL; |
22465 | ||
22466 | /* dwarf2_name had to be already called. */ | |
3b64bf15 | 22467 | gdb_assert (attr->canonical_string_p ()); |
96408a79 SA |
22468 | |
22469 | /* Strip the base name, keep any leading namespaces/classes. */ | |
2c830f54 TT |
22470 | base = strrchr (attr_name, ':'); |
22471 | if (base == NULL || base == attr_name || base[-1] != ':') | |
96408a79 SA |
22472 | return ""; |
22473 | ||
5e22e966 | 22474 | struct objfile *objfile = cu->per_objfile->objfile; |
0cf9feb9 | 22475 | return obstack_strndup (&objfile->per_bfd->storage_obstack, |
2c830f54 TT |
22476 | attr_name, |
22477 | &base[-1] - attr_name); | |
96408a79 SA |
22478 | } |
22479 | ||
fdde2d81 | 22480 | /* Return the name of the namespace/class that DIE is defined within, |
0114d602 | 22481 | or "" if we can't tell. The caller should not xfree the result. |
fdde2d81 | 22482 | |
0114d602 DJ |
22483 | For example, if we're within the method foo() in the following |
22484 | code: | |
22485 | ||
22486 | namespace N { | |
22487 | class C { | |
22488 | void foo () { | |
22489 | } | |
22490 | }; | |
22491 | } | |
22492 | ||
22493 | then determine_prefix on foo's die will return "N::C". */ | |
fdde2d81 | 22494 | |
0d5cff50 | 22495 | static const char * |
e142c38c | 22496 | determine_prefix (struct die_info *die, struct dwarf2_cu *cu) |
63d06c5c | 22497 | { |
976ca316 | 22498 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
0114d602 DJ |
22499 | struct die_info *parent, *spec_die; |
22500 | struct dwarf2_cu *spec_cu; | |
22501 | struct type *parent_type; | |
a121b7c1 | 22502 | const char *retval; |
63d06c5c | 22503 | |
9c37b5ae | 22504 | if (cu->language != language_cplus |
c44af4eb TT |
22505 | && cu->language != language_fortran && cu->language != language_d |
22506 | && cu->language != language_rust) | |
0114d602 DJ |
22507 | return ""; |
22508 | ||
96408a79 SA |
22509 | retval = anonymous_struct_prefix (die, cu); |
22510 | if (retval) | |
22511 | return retval; | |
22512 | ||
0114d602 DJ |
22513 | /* We have to be careful in the presence of DW_AT_specification. |
22514 | For example, with GCC 3.4, given the code | |
22515 | ||
22516 | namespace N { | |
22517 | void foo() { | |
22518 | // Definition of N::foo. | |
22519 | } | |
22520 | } | |
22521 | ||
22522 | then we'll have a tree of DIEs like this: | |
22523 | ||
22524 | 1: DW_TAG_compile_unit | |
22525 | 2: DW_TAG_namespace // N | |
22526 | 3: DW_TAG_subprogram // declaration of N::foo | |
22527 | 4: DW_TAG_subprogram // definition of N::foo | |
22528 | DW_AT_specification // refers to die #3 | |
22529 | ||
22530 | Thus, when processing die #4, we have to pretend that we're in | |
22531 | the context of its DW_AT_specification, namely the contex of die | |
22532 | #3. */ | |
22533 | spec_cu = cu; | |
22534 | spec_die = die_specification (die, &spec_cu); | |
22535 | if (spec_die == NULL) | |
22536 | parent = die->parent; | |
22537 | else | |
63d06c5c | 22538 | { |
0114d602 DJ |
22539 | parent = spec_die->parent; |
22540 | cu = spec_cu; | |
63d06c5c | 22541 | } |
0114d602 DJ |
22542 | |
22543 | if (parent == NULL) | |
22544 | return ""; | |
98bfdba5 PA |
22545 | else if (parent->building_fullname) |
22546 | { | |
22547 | const char *name; | |
22548 | const char *parent_name; | |
22549 | ||
22550 | /* It has been seen on RealView 2.2 built binaries, | |
22551 | DW_TAG_template_type_param types actually _defined_ as | |
22552 | children of the parent class: | |
22553 | ||
22554 | enum E {}; | |
22555 | template class <class Enum> Class{}; | |
22556 | Class<enum E> class_e; | |
22557 | ||
dda83cd7 SM |
22558 | 1: DW_TAG_class_type (Class) |
22559 | 2: DW_TAG_enumeration_type (E) | |
22560 | 3: DW_TAG_enumerator (enum1:0) | |
22561 | 3: DW_TAG_enumerator (enum2:1) | |
22562 | ... | |
22563 | 2: DW_TAG_template_type_param | |
22564 | DW_AT_type DW_FORM_ref_udata (E) | |
98bfdba5 PA |
22565 | |
22566 | Besides being broken debug info, it can put GDB into an | |
22567 | infinite loop. Consider: | |
22568 | ||
22569 | When we're building the full name for Class<E>, we'll start | |
22570 | at Class, and go look over its template type parameters, | |
22571 | finding E. We'll then try to build the full name of E, and | |
22572 | reach here. We're now trying to build the full name of E, | |
22573 | and look over the parent DIE for containing scope. In the | |
22574 | broken case, if we followed the parent DIE of E, we'd again | |
22575 | find Class, and once again go look at its template type | |
22576 | arguments, etc., etc. Simply don't consider such parent die | |
22577 | as source-level parent of this die (it can't be, the language | |
22578 | doesn't allow it), and break the loop here. */ | |
22579 | name = dwarf2_name (die, cu); | |
22580 | parent_name = dwarf2_name (parent, cu); | |
b98664d3 | 22581 | complaint (_("template param type '%s' defined within parent '%s'"), |
98bfdba5 PA |
22582 | name ? name : "<unknown>", |
22583 | parent_name ? parent_name : "<unknown>"); | |
22584 | return ""; | |
22585 | } | |
63d06c5c | 22586 | else |
0114d602 DJ |
22587 | switch (parent->tag) |
22588 | { | |
63d06c5c | 22589 | case DW_TAG_namespace: |
0114d602 | 22590 | parent_type = read_type_die (parent, cu); |
acebe513 UW |
22591 | /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus |
22592 | DW_TAG_namespace DIEs with a name of "::" for the global namespace. | |
22593 | Work around this problem here. */ | |
22594 | if (cu->language == language_cplus | |
7d93a1e0 | 22595 | && strcmp (parent_type->name (), "::") == 0) |
acebe513 | 22596 | return ""; |
0114d602 | 22597 | /* We give a name to even anonymous namespaces. */ |
7d93a1e0 | 22598 | return parent_type->name (); |
63d06c5c | 22599 | case DW_TAG_class_type: |
680b30c7 | 22600 | case DW_TAG_interface_type: |
63d06c5c | 22601 | case DW_TAG_structure_type: |
0114d602 | 22602 | case DW_TAG_union_type: |
f55ee35c | 22603 | case DW_TAG_module: |
0114d602 | 22604 | parent_type = read_type_die (parent, cu); |
7d93a1e0 SM |
22605 | if (parent_type->name () != NULL) |
22606 | return parent_type->name (); | |
0114d602 DJ |
22607 | else |
22608 | /* An anonymous structure is only allowed non-static data | |
22609 | members; no typedefs, no member functions, et cetera. | |
22610 | So it does not need a prefix. */ | |
22611 | return ""; | |
abc72ce4 | 22612 | case DW_TAG_compile_unit: |
95554aad | 22613 | case DW_TAG_partial_unit: |
abc72ce4 DE |
22614 | /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */ |
22615 | if (cu->language == language_cplus | |
976ca316 | 22616 | && !per_objfile->per_bfd->types.empty () |
abc72ce4 DE |
22617 | && die->child != NULL |
22618 | && (die->tag == DW_TAG_class_type | |
22619 | || die->tag == DW_TAG_structure_type | |
22620 | || die->tag == DW_TAG_union_type)) | |
22621 | { | |
43816ebc | 22622 | const char *name = guess_full_die_structure_name (die, cu); |
abc72ce4 DE |
22623 | if (name != NULL) |
22624 | return name; | |
22625 | } | |
22626 | return ""; | |
0a4b0913 AB |
22627 | case DW_TAG_subprogram: |
22628 | /* Nested subroutines in Fortran get a prefix with the name | |
22629 | of the parent's subroutine. */ | |
22630 | if (cu->language == language_fortran) | |
22631 | { | |
22632 | if ((die->tag == DW_TAG_subprogram) | |
22633 | && (dwarf2_name (parent, cu) != NULL)) | |
22634 | return dwarf2_name (parent, cu); | |
22635 | } | |
22636 | return determine_prefix (parent, cu); | |
3d567982 TT |
22637 | case DW_TAG_enumeration_type: |
22638 | parent_type = read_type_die (parent, cu); | |
3bc440a2 | 22639 | if (parent_type->is_declared_class ()) |
3d567982 | 22640 | { |
7d93a1e0 SM |
22641 | if (parent_type->name () != NULL) |
22642 | return parent_type->name (); | |
3d567982 TT |
22643 | return ""; |
22644 | } | |
22645 | /* Fall through. */ | |
63d06c5c | 22646 | default: |
8176b9b8 | 22647 | return determine_prefix (parent, cu); |
63d06c5c | 22648 | } |
63d06c5c DC |
22649 | } |
22650 | ||
3e43a32a MS |
22651 | /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX |
22652 | with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then | |
22653 | simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform | |
22654 | an obconcat, otherwise allocate storage for the result. The CU argument is | |
22655 | used to determine the language and hence, the appropriate separator. */ | |
987504bb | 22656 | |
f55ee35c | 22657 | #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */ |
63d06c5c DC |
22658 | |
22659 | static char * | |
f55ee35c | 22660 | typename_concat (struct obstack *obs, const char *prefix, const char *suffix, |
dda83cd7 | 22661 | int physname, struct dwarf2_cu *cu) |
63d06c5c | 22662 | { |
f55ee35c | 22663 | const char *lead = ""; |
5c315b68 | 22664 | const char *sep; |
63d06c5c | 22665 | |
3e43a32a MS |
22666 | if (suffix == NULL || suffix[0] == '\0' |
22667 | || prefix == NULL || prefix[0] == '\0') | |
987504bb | 22668 | sep = ""; |
45280282 IB |
22669 | else if (cu->language == language_d) |
22670 | { | |
22671 | /* For D, the 'main' function could be defined in any module, but it | |
22672 | should never be prefixed. */ | |
22673 | if (strcmp (suffix, "D main") == 0) | |
22674 | { | |
22675 | prefix = ""; | |
22676 | sep = ""; | |
22677 | } | |
22678 | else | |
22679 | sep = "."; | |
22680 | } | |
f55ee35c JK |
22681 | else if (cu->language == language_fortran && physname) |
22682 | { | |
22683 | /* This is gfortran specific mangling. Normally DW_AT_linkage_name or | |
22684 | DW_AT_MIPS_linkage_name is preferred and used instead. */ | |
22685 | ||
22686 | lead = "__"; | |
22687 | sep = "_MOD_"; | |
22688 | } | |
987504bb JJ |
22689 | else |
22690 | sep = "::"; | |
63d06c5c | 22691 | |
6dd47d34 DE |
22692 | if (prefix == NULL) |
22693 | prefix = ""; | |
22694 | if (suffix == NULL) | |
22695 | suffix = ""; | |
22696 | ||
987504bb JJ |
22697 | if (obs == NULL) |
22698 | { | |
3e43a32a | 22699 | char *retval |
224c3ddb SM |
22700 | = ((char *) |
22701 | xmalloc (strlen (prefix) + MAX_SEP_LEN + strlen (suffix) + 1)); | |
9a619af0 | 22702 | |
f55ee35c JK |
22703 | strcpy (retval, lead); |
22704 | strcat (retval, prefix); | |
6dd47d34 DE |
22705 | strcat (retval, sep); |
22706 | strcat (retval, suffix); | |
63d06c5c DC |
22707 | return retval; |
22708 | } | |
987504bb JJ |
22709 | else |
22710 | { | |
22711 | /* We have an obstack. */ | |
f55ee35c | 22712 | return obconcat (obs, lead, prefix, sep, suffix, (char *) NULL); |
987504bb | 22713 | } |
63d06c5c DC |
22714 | } |
22715 | ||
71c25dea TT |
22716 | /* Get name of a die, return NULL if not found. */ |
22717 | ||
15d034d0 TT |
22718 | static const char * |
22719 | dwarf2_canonicalize_name (const char *name, struct dwarf2_cu *cu, | |
be1e3d3e | 22720 | struct objfile *objfile) |
71c25dea TT |
22721 | { |
22722 | if (name && cu->language == language_cplus) | |
22723 | { | |
596dc4ad TT |
22724 | gdb::unique_xmalloc_ptr<char> canon_name |
22725 | = cp_canonicalize_string (name); | |
71c25dea | 22726 | |
596dc4ad TT |
22727 | if (canon_name != nullptr) |
22728 | name = objfile->intern (canon_name.get ()); | |
71c25dea TT |
22729 | } |
22730 | ||
22731 | return name; | |
c906108c SS |
22732 | } |
22733 | ||
96553a0c DE |
22734 | /* Get name of a die, return NULL if not found. |
22735 | Anonymous namespaces are converted to their magic string. */ | |
9219021c | 22736 | |
15d034d0 | 22737 | static const char * |
e142c38c | 22738 | dwarf2_name (struct die_info *die, struct dwarf2_cu *cu) |
9219021c DC |
22739 | { |
22740 | struct attribute *attr; | |
5e22e966 | 22741 | struct objfile *objfile = cu->per_objfile->objfile; |
9219021c | 22742 | |
e142c38c | 22743 | attr = dwarf2_attr (die, DW_AT_name, cu); |
2c830f54 TT |
22744 | const char *attr_name = attr == nullptr ? nullptr : attr->as_string (); |
22745 | if (attr_name == nullptr | |
96553a0c | 22746 | && die->tag != DW_TAG_namespace |
53832f31 TT |
22747 | && die->tag != DW_TAG_class_type |
22748 | && die->tag != DW_TAG_interface_type | |
22749 | && die->tag != DW_TAG_structure_type | |
22750 | && die->tag != DW_TAG_union_type) | |
71c25dea TT |
22751 | return NULL; |
22752 | ||
22753 | switch (die->tag) | |
22754 | { | |
22755 | case DW_TAG_compile_unit: | |
95554aad | 22756 | case DW_TAG_partial_unit: |
71c25dea TT |
22757 | /* Compilation units have a DW_AT_name that is a filename, not |
22758 | a source language identifier. */ | |
22759 | case DW_TAG_enumeration_type: | |
22760 | case DW_TAG_enumerator: | |
22761 | /* These tags always have simple identifiers already; no need | |
22762 | to canonicalize them. */ | |
2c830f54 | 22763 | return attr_name; |
907af001 | 22764 | |
96553a0c | 22765 | case DW_TAG_namespace: |
2c830f54 TT |
22766 | if (attr_name != nullptr) |
22767 | return attr_name; | |
96553a0c DE |
22768 | return CP_ANONYMOUS_NAMESPACE_STR; |
22769 | ||
907af001 UW |
22770 | case DW_TAG_class_type: |
22771 | case DW_TAG_interface_type: | |
22772 | case DW_TAG_structure_type: | |
22773 | case DW_TAG_union_type: | |
22774 | /* Some GCC versions emit spurious DW_AT_name attributes for unnamed | |
22775 | structures or unions. These were of the form "._%d" in GCC 4.1, | |
22776 | or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3 | |
22777 | and GCC 4.4. We work around this problem by ignoring these. */ | |
2c830f54 TT |
22778 | if (attr_name != nullptr |
22779 | && (startswith (attr_name, "._") | |
22780 | || startswith (attr_name, "<anonymous"))) | |
907af001 | 22781 | return NULL; |
53832f31 TT |
22782 | |
22783 | /* GCC might emit a nameless typedef that has a linkage name. See | |
22784 | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */ | |
2c830f54 | 22785 | if (!attr || attr_name == NULL) |
53832f31 | 22786 | { |
73b9be8b | 22787 | attr = dw2_linkage_name_attr (die, cu); |
95eb9e54 | 22788 | attr_name = attr == nullptr ? nullptr : attr->as_string (); |
2c830f54 | 22789 | if (attr == NULL || attr_name == NULL) |
53832f31 TT |
22790 | return NULL; |
22791 | ||
2c830f54 | 22792 | /* Avoid demangling attr_name the second time on a second |
df5c6c50 | 22793 | call for the same DIE. */ |
3b64bf15 | 22794 | if (!attr->canonical_string_p ()) |
53832f31 | 22795 | { |
43816ebc | 22796 | gdb::unique_xmalloc_ptr<char> demangled |
2c830f54 | 22797 | (gdb_demangle (attr_name, DMGL_TYPES)); |
4f180d53 AT |
22798 | if (demangled == nullptr) |
22799 | return nullptr; | |
43816ebc | 22800 | |
c6481205 | 22801 | attr->set_string_canonical (objfile->intern (demangled.get ())); |
95eb9e54 | 22802 | attr_name = attr->as_string (); |
53832f31 | 22803 | } |
67430cd0 | 22804 | |
2c830f54 TT |
22805 | /* Strip any leading namespaces/classes, keep only the |
22806 | base name. DW_AT_name for named DIEs does not | |
22807 | contain the prefixes. */ | |
22808 | const char *base = strrchr (attr_name, ':'); | |
22809 | if (base && base > attr_name && base[-1] == ':') | |
67430cd0 TT |
22810 | return &base[1]; |
22811 | else | |
2c830f54 | 22812 | return attr_name; |
53832f31 | 22813 | } |
907af001 UW |
22814 | break; |
22815 | ||
71c25dea | 22816 | default: |
907af001 UW |
22817 | break; |
22818 | } | |
22819 | ||
3b64bf15 | 22820 | if (!attr->canonical_string_p ()) |
c6481205 TT |
22821 | attr->set_string_canonical (dwarf2_canonicalize_name (attr_name, cu, |
22822 | objfile)); | |
2c830f54 | 22823 | return attr->as_string (); |
9219021c DC |
22824 | } |
22825 | ||
22826 | /* Return the die that this die in an extension of, or NULL if there | |
f2f0e013 DJ |
22827 | is none. *EXT_CU is the CU containing DIE on input, and the CU |
22828 | containing the return value on output. */ | |
9219021c DC |
22829 | |
22830 | static struct die_info * | |
f2f0e013 | 22831 | dwarf2_extension (struct die_info *die, struct dwarf2_cu **ext_cu) |
9219021c DC |
22832 | { |
22833 | struct attribute *attr; | |
9219021c | 22834 | |
f2f0e013 | 22835 | attr = dwarf2_attr (die, DW_AT_extension, *ext_cu); |
9219021c DC |
22836 | if (attr == NULL) |
22837 | return NULL; | |
22838 | ||
f2f0e013 | 22839 | return follow_die_ref (die, attr, ext_cu); |
9219021c DC |
22840 | } |
22841 | ||
f9aca02d | 22842 | static void |
d97bc12b | 22843 | dump_die_shallow (struct ui_file *f, int indent, struct die_info *die) |
c906108c SS |
22844 | { |
22845 | unsigned int i; | |
22846 | ||
d97bc12b | 22847 | print_spaces (indent, f); |
9d8780f0 | 22848 | fprintf_unfiltered (f, "Die: %s (abbrev %d, offset %s)\n", |
9c541725 | 22849 | dwarf_tag_name (die->tag), die->abbrev, |
9d8780f0 | 22850 | sect_offset_str (die->sect_off)); |
d97bc12b DE |
22851 | |
22852 | if (die->parent != NULL) | |
22853 | { | |
22854 | print_spaces (indent, f); | |
9d8780f0 SM |
22855 | fprintf_unfiltered (f, " parent at offset: %s\n", |
22856 | sect_offset_str (die->parent->sect_off)); | |
d97bc12b DE |
22857 | } |
22858 | ||
22859 | print_spaces (indent, f); | |
22860 | fprintf_unfiltered (f, " has children: %s\n", | |
639d11d3 | 22861 | dwarf_bool_name (die->child != NULL)); |
c906108c | 22862 | |
d97bc12b DE |
22863 | print_spaces (indent, f); |
22864 | fprintf_unfiltered (f, " attributes:\n"); | |
22865 | ||
c906108c SS |
22866 | for (i = 0; i < die->num_attrs; ++i) |
22867 | { | |
d97bc12b DE |
22868 | print_spaces (indent, f); |
22869 | fprintf_unfiltered (f, " %s (%s) ", | |
c906108c SS |
22870 | dwarf_attr_name (die->attrs[i].name), |
22871 | dwarf_form_name (die->attrs[i].form)); | |
d97bc12b | 22872 | |
c906108c SS |
22873 | switch (die->attrs[i].form) |
22874 | { | |
c906108c | 22875 | case DW_FORM_addr: |
336d760d | 22876 | case DW_FORM_addrx: |
3019eac3 | 22877 | case DW_FORM_GNU_addr_index: |
d97bc12b | 22878 | fprintf_unfiltered (f, "address: "); |
36d378cf | 22879 | fputs_filtered (hex_string (die->attrs[i].as_address ()), f); |
c906108c SS |
22880 | break; |
22881 | case DW_FORM_block2: | |
22882 | case DW_FORM_block4: | |
22883 | case DW_FORM_block: | |
22884 | case DW_FORM_block1: | |
56eb65bd | 22885 | fprintf_unfiltered (f, "block: size %s", |
9d2246fc | 22886 | pulongest (die->attrs[i].as_block ()->size)); |
c906108c | 22887 | break; |
2dc7f7b3 | 22888 | case DW_FORM_exprloc: |
56eb65bd | 22889 | fprintf_unfiltered (f, "expression: size %s", |
9d2246fc | 22890 | pulongest (die->attrs[i].as_block ()->size)); |
2dc7f7b3 | 22891 | break; |
0224619f JK |
22892 | case DW_FORM_data16: |
22893 | fprintf_unfiltered (f, "constant of 16 bytes"); | |
22894 | break; | |
4568ecf9 DE |
22895 | case DW_FORM_ref_addr: |
22896 | fprintf_unfiltered (f, "ref address: "); | |
529908cb | 22897 | fputs_filtered (hex_string (die->attrs[i].as_unsigned ()), f); |
4568ecf9 | 22898 | break; |
36586728 TT |
22899 | case DW_FORM_GNU_ref_alt: |
22900 | fprintf_unfiltered (f, "alt ref address: "); | |
529908cb | 22901 | fputs_filtered (hex_string (die->attrs[i].as_unsigned ()), f); |
36586728 | 22902 | break; |
10b3939b DJ |
22903 | case DW_FORM_ref1: |
22904 | case DW_FORM_ref2: | |
22905 | case DW_FORM_ref4: | |
4568ecf9 DE |
22906 | case DW_FORM_ref8: |
22907 | case DW_FORM_ref_udata: | |
d97bc12b | 22908 | fprintf_unfiltered (f, "constant ref: 0x%lx (adjusted)", |
529908cb | 22909 | (long) (die->attrs[i].as_unsigned ())); |
10b3939b | 22910 | break; |
c906108c SS |
22911 | case DW_FORM_data1: |
22912 | case DW_FORM_data2: | |
22913 | case DW_FORM_data4: | |
ce5d95e1 | 22914 | case DW_FORM_data8: |
c906108c | 22915 | case DW_FORM_udata: |
43bbcdc2 | 22916 | fprintf_unfiltered (f, "constant: %s", |
529908cb | 22917 | pulongest (die->attrs[i].as_unsigned ())); |
c906108c | 22918 | break; |
2dc7f7b3 TT |
22919 | case DW_FORM_sec_offset: |
22920 | fprintf_unfiltered (f, "section offset: %s", | |
529908cb | 22921 | pulongest (die->attrs[i].as_unsigned ())); |
2dc7f7b3 | 22922 | break; |
55f1336d | 22923 | case DW_FORM_ref_sig8: |
ac9ec31b | 22924 | fprintf_unfiltered (f, "signature: %s", |
630ed6b9 | 22925 | hex_string (die->attrs[i].as_signature ())); |
348e048f | 22926 | break; |
c906108c | 22927 | case DW_FORM_string: |
4bdf3d34 | 22928 | case DW_FORM_strp: |
43988095 | 22929 | case DW_FORM_line_strp: |
cf532bd1 | 22930 | case DW_FORM_strx: |
3019eac3 | 22931 | case DW_FORM_GNU_str_index: |
36586728 | 22932 | case DW_FORM_GNU_strp_alt: |
8285870a | 22933 | fprintf_unfiltered (f, "string: \"%s\" (%s canonicalized)", |
c6481205 TT |
22934 | die->attrs[i].as_string () |
22935 | ? die->attrs[i].as_string () : "", | |
22936 | die->attrs[i].canonical_string_p () ? "is" : "not"); | |
c906108c SS |
22937 | break; |
22938 | case DW_FORM_flag: | |
c45bc3f8 | 22939 | if (die->attrs[i].as_boolean ()) |
d97bc12b | 22940 | fprintf_unfiltered (f, "flag: TRUE"); |
c906108c | 22941 | else |
d97bc12b | 22942 | fprintf_unfiltered (f, "flag: FALSE"); |
c906108c | 22943 | break; |
2dc7f7b3 TT |
22944 | case DW_FORM_flag_present: |
22945 | fprintf_unfiltered (f, "flag: TRUE"); | |
22946 | break; | |
a8329558 | 22947 | case DW_FORM_indirect: |
0963b4bd MS |
22948 | /* The reader will have reduced the indirect form to |
22949 | the "base form" so this form should not occur. */ | |
5f48f8f3 | 22950 | fprintf_unfiltered (f, |
3e43a32a | 22951 | "unexpected attribute form: DW_FORM_indirect"); |
a8329558 | 22952 | break; |
1bc397c5 | 22953 | case DW_FORM_sdata: |
663c44ac JK |
22954 | case DW_FORM_implicit_const: |
22955 | fprintf_unfiltered (f, "constant: %s", | |
1bc397c5 | 22956 | plongest (die->attrs[i].as_signed ())); |
663c44ac | 22957 | break; |
c906108c | 22958 | default: |
d97bc12b | 22959 | fprintf_unfiltered (f, "unsupported attribute form: %d.", |
c5aa993b | 22960 | die->attrs[i].form); |
d97bc12b | 22961 | break; |
c906108c | 22962 | } |
d97bc12b | 22963 | fprintf_unfiltered (f, "\n"); |
c906108c SS |
22964 | } |
22965 | } | |
22966 | ||
f9aca02d | 22967 | static void |
d97bc12b | 22968 | dump_die_for_error (struct die_info *die) |
c906108c | 22969 | { |
d97bc12b DE |
22970 | dump_die_shallow (gdb_stderr, 0, die); |
22971 | } | |
22972 | ||
22973 | static void | |
22974 | dump_die_1 (struct ui_file *f, int level, int max_level, struct die_info *die) | |
22975 | { | |
22976 | int indent = level * 4; | |
22977 | ||
22978 | gdb_assert (die != NULL); | |
22979 | ||
22980 | if (level >= max_level) | |
22981 | return; | |
22982 | ||
22983 | dump_die_shallow (f, indent, die); | |
22984 | ||
22985 | if (die->child != NULL) | |
c906108c | 22986 | { |
d97bc12b DE |
22987 | print_spaces (indent, f); |
22988 | fprintf_unfiltered (f, " Children:"); | |
22989 | if (level + 1 < max_level) | |
22990 | { | |
22991 | fprintf_unfiltered (f, "\n"); | |
22992 | dump_die_1 (f, level + 1, max_level, die->child); | |
22993 | } | |
22994 | else | |
22995 | { | |
3e43a32a MS |
22996 | fprintf_unfiltered (f, |
22997 | " [not printed, max nesting level reached]\n"); | |
d97bc12b DE |
22998 | } |
22999 | } | |
23000 | ||
23001 | if (die->sibling != NULL && level > 0) | |
23002 | { | |
23003 | dump_die_1 (f, level, max_level, die->sibling); | |
c906108c SS |
23004 | } |
23005 | } | |
23006 | ||
d97bc12b DE |
23007 | /* This is called from the pdie macro in gdbinit.in. |
23008 | It's not static so gcc will keep a copy callable from gdb. */ | |
23009 | ||
23010 | void | |
23011 | dump_die (struct die_info *die, int max_level) | |
23012 | { | |
23013 | dump_die_1 (gdb_stdlog, 0, max_level, die); | |
23014 | } | |
23015 | ||
f9aca02d | 23016 | static void |
51545339 | 23017 | store_in_ref_table (struct die_info *die, struct dwarf2_cu *cu) |
c906108c | 23018 | { |
51545339 | 23019 | void **slot; |
c906108c | 23020 | |
9c541725 PA |
23021 | slot = htab_find_slot_with_hash (cu->die_hash, die, |
23022 | to_underlying (die->sect_off), | |
b64f50a1 | 23023 | INSERT); |
51545339 DJ |
23024 | |
23025 | *slot = die; | |
c906108c SS |
23026 | } |
23027 | ||
348e048f DE |
23028 | /* Follow reference or signature attribute ATTR of SRC_DIE. |
23029 | On entry *REF_CU is the CU of SRC_DIE. | |
23030 | On exit *REF_CU is the CU of the result. */ | |
23031 | ||
23032 | static struct die_info * | |
ff39bb5e | 23033 | follow_die_ref_or_sig (struct die_info *src_die, const struct attribute *attr, |
348e048f DE |
23034 | struct dwarf2_cu **ref_cu) |
23035 | { | |
23036 | struct die_info *die; | |
23037 | ||
cd6c91b4 | 23038 | if (attr->form_is_ref ()) |
348e048f | 23039 | die = follow_die_ref (src_die, attr, ref_cu); |
55f1336d | 23040 | else if (attr->form == DW_FORM_ref_sig8) |
348e048f DE |
23041 | die = follow_die_sig (src_die, attr, ref_cu); |
23042 | else | |
23043 | { | |
23044 | dump_die_for_error (src_die); | |
23045 | error (_("Dwarf Error: Expected reference attribute [in module %s]"), | |
5e22e966 | 23046 | objfile_name ((*ref_cu)->per_objfile->objfile)); |
348e048f DE |
23047 | } |
23048 | ||
23049 | return die; | |
03dd20cc DJ |
23050 | } |
23051 | ||
5c631832 | 23052 | /* Follow reference OFFSET. |
673bfd45 DE |
23053 | On entry *REF_CU is the CU of the source die referencing OFFSET. |
23054 | On exit *REF_CU is the CU of the result. | |
23055 | Returns NULL if OFFSET is invalid. */ | |
f504f079 | 23056 | |
f9aca02d | 23057 | static struct die_info * |
9c541725 | 23058 | follow_die_offset (sect_offset sect_off, int offset_in_dwz, |
36586728 | 23059 | struct dwarf2_cu **ref_cu) |
c906108c | 23060 | { |
10b3939b | 23061 | struct die_info temp_die; |
f2f0e013 | 23062 | struct dwarf2_cu *target_cu, *cu = *ref_cu; |
976ca316 | 23063 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
10b3939b | 23064 | |
348e048f DE |
23065 | gdb_assert (cu->per_cu != NULL); |
23066 | ||
98bfdba5 PA |
23067 | target_cu = cu; |
23068 | ||
17e593e9 SM |
23069 | dwarf_read_debug_printf_v ("source CU offset: %s, target offset: %s, " |
23070 | "source CU contains target offset: %d", | |
23071 | sect_offset_str (cu->per_cu->sect_off), | |
23072 | sect_offset_str (sect_off), | |
23073 | cu->header.offset_in_cu_p (sect_off)); | |
23074 | ||
3019eac3 | 23075 | if (cu->per_cu->is_debug_types) |
348e048f DE |
23076 | { |
23077 | /* .debug_types CUs cannot reference anything outside their CU. | |
23078 | If they need to, they have to reference a signatured type via | |
55f1336d | 23079 | DW_FORM_ref_sig8. */ |
4057dfde | 23080 | if (!cu->header.offset_in_cu_p (sect_off)) |
5c631832 | 23081 | return NULL; |
348e048f | 23082 | } |
36586728 | 23083 | else if (offset_in_dwz != cu->per_cu->is_dwz |
4057dfde | 23084 | || !cu->header.offset_in_cu_p (sect_off)) |
10b3939b DJ |
23085 | { |
23086 | struct dwarf2_per_cu_data *per_cu; | |
9a619af0 | 23087 | |
9c541725 | 23088 | per_cu = dwarf2_find_containing_comp_unit (sect_off, offset_in_dwz, |
976ca316 | 23089 | per_objfile); |
03dd20cc | 23090 | |
17e593e9 SM |
23091 | dwarf_read_debug_printf_v ("target CU offset: %s, " |
23092 | "target CU DIEs loaded: %d", | |
23093 | sect_offset_str (per_cu->sect_off), | |
23094 | per_objfile->get_cu (per_cu) != nullptr); | |
23095 | ||
616c069a SM |
23096 | /* If necessary, add it to the queue and load its DIEs. |
23097 | ||
23098 | Even if maybe_queue_comp_unit doesn't require us to load the CU's DIEs, | |
23099 | it doesn't mean they are currently loaded. Since we require them | |
23100 | to be loaded, we must check for ourselves. */ | |
23101 | if (maybe_queue_comp_unit (cu, per_cu, per_objfile, cu->language) | |
23102 | || per_objfile->get_cu (per_cu) == nullptr) | |
4a636814 SM |
23103 | load_full_comp_unit (per_cu, per_objfile, per_objfile->get_cu (per_cu), |
23104 | false, cu->language); | |
03dd20cc | 23105 | |
976ca316 | 23106 | target_cu = per_objfile->get_cu (per_cu); |
616c069a | 23107 | gdb_assert (target_cu != nullptr); |
10b3939b | 23108 | } |
98bfdba5 PA |
23109 | else if (cu->dies == NULL) |
23110 | { | |
23111 | /* We're loading full DIEs during partial symbol reading. */ | |
976ca316 | 23112 | gdb_assert (per_objfile->per_bfd->reading_partial_symbols); |
4a636814 SM |
23113 | load_full_comp_unit (cu->per_cu, per_objfile, cu, false, |
23114 | language_minimal); | |
98bfdba5 | 23115 | } |
c906108c | 23116 | |
f2f0e013 | 23117 | *ref_cu = target_cu; |
9c541725 | 23118 | temp_die.sect_off = sect_off; |
c24bdb02 | 23119 | |
3db19b2d TV |
23120 | if (target_cu != cu) |
23121 | target_cu->ancestor = cu; | |
23122 | ||
9a3c8263 | 23123 | return (struct die_info *) htab_find_with_hash (target_cu->die_hash, |
9c541725 PA |
23124 | &temp_die, |
23125 | to_underlying (sect_off)); | |
5c631832 | 23126 | } |
10b3939b | 23127 | |
5c631832 JK |
23128 | /* Follow reference attribute ATTR of SRC_DIE. |
23129 | On entry *REF_CU is the CU of SRC_DIE. | |
23130 | On exit *REF_CU is the CU of the result. */ | |
23131 | ||
23132 | static struct die_info * | |
ff39bb5e | 23133 | follow_die_ref (struct die_info *src_die, const struct attribute *attr, |
5c631832 JK |
23134 | struct dwarf2_cu **ref_cu) |
23135 | { | |
0826b30a | 23136 | sect_offset sect_off = attr->get_ref_die_offset (); |
5c631832 JK |
23137 | struct dwarf2_cu *cu = *ref_cu; |
23138 | struct die_info *die; | |
23139 | ||
9c541725 | 23140 | die = follow_die_offset (sect_off, |
36586728 TT |
23141 | (attr->form == DW_FORM_GNU_ref_alt |
23142 | || cu->per_cu->is_dwz), | |
23143 | ref_cu); | |
5c631832 | 23144 | if (!die) |
9d8780f0 SM |
23145 | error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE " |
23146 | "at %s [in module %s]"), | |
23147 | sect_offset_str (sect_off), sect_offset_str (src_die->sect_off), | |
5e22e966 | 23148 | objfile_name (cu->per_objfile->objfile)); |
348e048f | 23149 | |
5c631832 JK |
23150 | return die; |
23151 | } | |
23152 | ||
d4c9a4f8 | 23153 | /* See read.h. */ |
5c631832 JK |
23154 | |
23155 | struct dwarf2_locexpr_baton | |
9c541725 | 23156 | dwarf2_fetch_die_loc_sect_off (sect_offset sect_off, |
d4c9a4f8 | 23157 | dwarf2_per_cu_data *per_cu, |
976ca316 | 23158 | dwarf2_per_objfile *per_objfile, |
041d9819 SM |
23159 | gdb::function_view<CORE_ADDR ()> get_frame_pc, |
23160 | bool resolve_abstract_p) | |
5c631832 | 23161 | { |
5c631832 JK |
23162 | struct die_info *die; |
23163 | struct attribute *attr; | |
23164 | struct dwarf2_locexpr_baton retval; | |
976ca316 | 23165 | struct objfile *objfile = per_objfile->objfile; |
8cf6f0b1 | 23166 | |
976ca316 | 23167 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
1b555f17 | 23168 | if (cu == nullptr) |
976ca316 | 23169 | cu = load_cu (per_cu, per_objfile, false); |
1b555f17 SM |
23170 | |
23171 | if (cu == nullptr) | |
cc12ce38 DE |
23172 | { |
23173 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23174 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23175 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23176 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23177 | } |
918dd910 | 23178 | |
9c541725 | 23179 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
5c631832 | 23180 | if (!die) |
9d8780f0 SM |
23181 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23182 | sect_offset_str (sect_off), objfile_name (objfile)); | |
5c631832 JK |
23183 | |
23184 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
e4a62c65 | 23185 | if (!attr && resolve_abstract_p |
976ca316 SM |
23186 | && (per_objfile->per_bfd->abstract_to_concrete.find (die->sect_off) |
23187 | != per_objfile->per_bfd->abstract_to_concrete.end ())) | |
e4a62c65 | 23188 | { |
041d9819 | 23189 | CORE_ADDR pc = get_frame_pc (); |
b3b3bada | 23190 | CORE_ADDR baseaddr = objfile->text_section_offset (); |
08feed99 | 23191 | struct gdbarch *gdbarch = objfile->arch (); |
e4a62c65 | 23192 | |
3360b6e7 | 23193 | for (const auto &cand_off |
976ca316 | 23194 | : per_objfile->per_bfd->abstract_to_concrete[die->sect_off]) |
e4a62c65 | 23195 | { |
3360b6e7 TV |
23196 | struct dwarf2_cu *cand_cu = cu; |
23197 | struct die_info *cand | |
23198 | = follow_die_offset (cand_off, per_cu->is_dwz, &cand_cu); | |
23199 | if (!cand | |
23200 | || !cand->parent | |
e4a62c65 TV |
23201 | || cand->parent->tag != DW_TAG_subprogram) |
23202 | continue; | |
23203 | ||
23204 | CORE_ADDR pc_low, pc_high; | |
23205 | get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu); | |
eba4caf2 TV |
23206 | if (pc_low == ((CORE_ADDR) -1)) |
23207 | continue; | |
23208 | pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr); | |
23209 | pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr); | |
23210 | if (!(pc_low <= pc && pc < pc_high)) | |
e4a62c65 TV |
23211 | continue; |
23212 | ||
23213 | die = cand; | |
23214 | attr = dwarf2_attr (die, DW_AT_location, cu); | |
23215 | break; | |
23216 | } | |
23217 | } | |
23218 | ||
5c631832 JK |
23219 | if (!attr) |
23220 | { | |
e103e986 JK |
23221 | /* DWARF: "If there is no such attribute, then there is no effect.". |
23222 | DATA is ignored if SIZE is 0. */ | |
5c631832 | 23223 | |
e103e986 | 23224 | retval.data = NULL; |
5c631832 JK |
23225 | retval.size = 0; |
23226 | } | |
cd6c91b4 | 23227 | else if (attr->form_is_section_offset ()) |
8cf6f0b1 TT |
23228 | { |
23229 | struct dwarf2_loclist_baton loclist_baton; | |
041d9819 | 23230 | CORE_ADDR pc = get_frame_pc (); |
8cf6f0b1 TT |
23231 | size_t size; |
23232 | ||
23233 | fill_in_loclist_baton (cu, &loclist_baton, attr); | |
23234 | ||
23235 | retval.data = dwarf2_find_location_expression (&loclist_baton, | |
23236 | &size, pc); | |
23237 | retval.size = size; | |
23238 | } | |
5c631832 JK |
23239 | else |
23240 | { | |
4fc6c0d5 | 23241 | if (!attr->form_is_block ()) |
9d8780f0 | 23242 | error (_("Dwarf Error: DIE at %s referenced in module %s " |
5c631832 | 23243 | "is neither DW_FORM_block* nor DW_FORM_exprloc"), |
9d8780f0 | 23244 | sect_offset_str (sect_off), objfile_name (objfile)); |
5c631832 | 23245 | |
9d2246fc TT |
23246 | struct dwarf_block *block = attr->as_block (); |
23247 | retval.data = block->data; | |
23248 | retval.size = block->size; | |
5c631832 | 23249 | } |
976ca316 | 23250 | retval.per_objfile = per_objfile; |
5c631832 | 23251 | retval.per_cu = cu->per_cu; |
918dd910 | 23252 | |
976ca316 | 23253 | per_objfile->age_comp_units (); |
918dd910 | 23254 | |
5c631832 | 23255 | return retval; |
348e048f DE |
23256 | } |
23257 | ||
d4c9a4f8 | 23258 | /* See read.h. */ |
8b9737bf TT |
23259 | |
23260 | struct dwarf2_locexpr_baton | |
23261 | dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu, | |
d4c9a4f8 | 23262 | dwarf2_per_cu_data *per_cu, |
14095eb3 | 23263 | dwarf2_per_objfile *per_objfile, |
041d9819 | 23264 | gdb::function_view<CORE_ADDR ()> get_frame_pc) |
8b9737bf | 23265 | { |
9c541725 | 23266 | sect_offset sect_off = per_cu->sect_off + to_underlying (offset_in_cu); |
8b9737bf | 23267 | |
14095eb3 | 23268 | return dwarf2_fetch_die_loc_sect_off (sect_off, per_cu, per_objfile, |
041d9819 | 23269 | get_frame_pc); |
8b9737bf TT |
23270 | } |
23271 | ||
b6807d98 TT |
23272 | /* Write a constant of a given type as target-ordered bytes into |
23273 | OBSTACK. */ | |
23274 | ||
23275 | static const gdb_byte * | |
23276 | write_constant_as_bytes (struct obstack *obstack, | |
23277 | enum bfd_endian byte_order, | |
23278 | struct type *type, | |
23279 | ULONGEST value, | |
23280 | LONGEST *len) | |
23281 | { | |
23282 | gdb_byte *result; | |
23283 | ||
23284 | *len = TYPE_LENGTH (type); | |
224c3ddb | 23285 | result = (gdb_byte *) obstack_alloc (obstack, *len); |
b6807d98 TT |
23286 | store_unsigned_integer (result, *len, byte_order, value); |
23287 | ||
23288 | return result; | |
23289 | } | |
23290 | ||
d4c9a4f8 | 23291 | /* See read.h. */ |
b6807d98 TT |
23292 | |
23293 | const gdb_byte * | |
9c541725 | 23294 | dwarf2_fetch_constant_bytes (sect_offset sect_off, |
d4c9a4f8 | 23295 | dwarf2_per_cu_data *per_cu, |
14095eb3 | 23296 | dwarf2_per_objfile *per_objfile, |
d4c9a4f8 | 23297 | obstack *obstack, |
b6807d98 TT |
23298 | LONGEST *len) |
23299 | { | |
b6807d98 TT |
23300 | struct die_info *die; |
23301 | struct attribute *attr; | |
23302 | const gdb_byte *result = NULL; | |
23303 | struct type *type; | |
23304 | LONGEST value; | |
23305 | enum bfd_endian byte_order; | |
14095eb3 | 23306 | struct objfile *objfile = per_objfile->objfile; |
b6807d98 | 23307 | |
7188ed02 | 23308 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
1b555f17 SM |
23309 | if (cu == nullptr) |
23310 | cu = load_cu (per_cu, per_objfile, false); | |
23311 | ||
23312 | if (cu == nullptr) | |
cc12ce38 DE |
23313 | { |
23314 | /* We shouldn't get here for a dummy CU, but don't crash on the user. | |
23315 | Instead just throw an error, not much else we can do. */ | |
9d8780f0 SM |
23316 | error (_("Dwarf Error: Dummy CU at %s referenced in module %s"), |
23317 | sect_offset_str (sect_off), objfile_name (objfile)); | |
cc12ce38 | 23318 | } |
b6807d98 | 23319 | |
9c541725 | 23320 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
b6807d98 | 23321 | if (!die) |
9d8780f0 SM |
23322 | error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"), |
23323 | sect_offset_str (sect_off), objfile_name (objfile)); | |
b6807d98 TT |
23324 | |
23325 | attr = dwarf2_attr (die, DW_AT_const_value, cu); | |
23326 | if (attr == NULL) | |
23327 | return NULL; | |
23328 | ||
e3b94546 | 23329 | byte_order = (bfd_big_endian (objfile->obfd) |
b6807d98 TT |
23330 | ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); |
23331 | ||
23332 | switch (attr->form) | |
23333 | { | |
23334 | case DW_FORM_addr: | |
336d760d | 23335 | case DW_FORM_addrx: |
b6807d98 TT |
23336 | case DW_FORM_GNU_addr_index: |
23337 | { | |
23338 | gdb_byte *tem; | |
23339 | ||
23340 | *len = cu->header.addr_size; | |
224c3ddb | 23341 | tem = (gdb_byte *) obstack_alloc (obstack, *len); |
36d378cf | 23342 | store_unsigned_integer (tem, *len, byte_order, attr->as_address ()); |
b6807d98 TT |
23343 | result = tem; |
23344 | } | |
23345 | break; | |
23346 | case DW_FORM_string: | |
23347 | case DW_FORM_strp: | |
cf532bd1 | 23348 | case DW_FORM_strx: |
b6807d98 TT |
23349 | case DW_FORM_GNU_str_index: |
23350 | case DW_FORM_GNU_strp_alt: | |
c6481205 | 23351 | /* The string is already allocated on the objfile obstack, point |
b6807d98 | 23352 | directly to it. */ |
2c830f54 TT |
23353 | { |
23354 | const char *attr_name = attr->as_string (); | |
23355 | result = (const gdb_byte *) attr_name; | |
23356 | *len = strlen (attr_name); | |
23357 | } | |
b6807d98 TT |
23358 | break; |
23359 | case DW_FORM_block1: | |
23360 | case DW_FORM_block2: | |
23361 | case DW_FORM_block4: | |
23362 | case DW_FORM_block: | |
23363 | case DW_FORM_exprloc: | |
0224619f | 23364 | case DW_FORM_data16: |
9d2246fc TT |
23365 | { |
23366 | struct dwarf_block *block = attr->as_block (); | |
23367 | result = block->data; | |
23368 | *len = block->size; | |
23369 | } | |
b6807d98 TT |
23370 | break; |
23371 | ||
23372 | /* The DW_AT_const_value attributes are supposed to carry the | |
23373 | symbol's value "represented as it would be on the target | |
23374 | architecture." By the time we get here, it's already been | |
23375 | converted to host endianness, so we just need to sign- or | |
23376 | zero-extend it as appropriate. */ | |
23377 | case DW_FORM_data1: | |
23378 | type = die_type (die, cu); | |
23379 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 8); | |
23380 | if (result == NULL) | |
23381 | result = write_constant_as_bytes (obstack, byte_order, | |
23382 | type, value, len); | |
23383 | break; | |
23384 | case DW_FORM_data2: | |
23385 | type = die_type (die, cu); | |
23386 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 16); | |
23387 | if (result == NULL) | |
23388 | result = write_constant_as_bytes (obstack, byte_order, | |
23389 | type, value, len); | |
23390 | break; | |
23391 | case DW_FORM_data4: | |
23392 | type = die_type (die, cu); | |
23393 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 32); | |
23394 | if (result == NULL) | |
23395 | result = write_constant_as_bytes (obstack, byte_order, | |
23396 | type, value, len); | |
23397 | break; | |
23398 | case DW_FORM_data8: | |
23399 | type = die_type (die, cu); | |
23400 | result = dwarf2_const_value_data (attr, obstack, cu, &value, 64); | |
23401 | if (result == NULL) | |
23402 | result = write_constant_as_bytes (obstack, byte_order, | |
23403 | type, value, len); | |
23404 | break; | |
23405 | ||
23406 | case DW_FORM_sdata: | |
663c44ac | 23407 | case DW_FORM_implicit_const: |
b6807d98 TT |
23408 | type = die_type (die, cu); |
23409 | result = write_constant_as_bytes (obstack, byte_order, | |
1bc397c5 | 23410 | type, attr->as_signed (), len); |
b6807d98 TT |
23411 | break; |
23412 | ||
23413 | case DW_FORM_udata: | |
23414 | type = die_type (die, cu); | |
23415 | result = write_constant_as_bytes (obstack, byte_order, | |
529908cb | 23416 | type, attr->as_unsigned (), len); |
b6807d98 TT |
23417 | break; |
23418 | ||
23419 | default: | |
b98664d3 | 23420 | complaint (_("unsupported const value attribute form: '%s'"), |
b6807d98 TT |
23421 | dwarf_form_name (attr->form)); |
23422 | break; | |
23423 | } | |
23424 | ||
23425 | return result; | |
23426 | } | |
23427 | ||
d4c9a4f8 | 23428 | /* See read.h. */ |
7942e96e AA |
23429 | |
23430 | struct type * | |
9c541725 | 23431 | dwarf2_fetch_die_type_sect_off (sect_offset sect_off, |
14095eb3 SM |
23432 | dwarf2_per_cu_data *per_cu, |
23433 | dwarf2_per_objfile *per_objfile) | |
7942e96e | 23434 | { |
7942e96e AA |
23435 | struct die_info *die; |
23436 | ||
7188ed02 | 23437 | dwarf2_cu *cu = per_objfile->get_cu (per_cu); |
1b555f17 SM |
23438 | if (cu == nullptr) |
23439 | cu = load_cu (per_cu, per_objfile, false); | |
23440 | ||
23441 | if (cu == nullptr) | |
23442 | return nullptr; | |
7942e96e | 23443 | |
9c541725 | 23444 | die = follow_die_offset (sect_off, per_cu->is_dwz, &cu); |
7942e96e AA |
23445 | if (!die) |
23446 | return NULL; | |
23447 | ||
23448 | return die_type (die, cu); | |
23449 | } | |
23450 | ||
8cb5117c | 23451 | /* See read.h. */ |
8a9b8146 TT |
23452 | |
23453 | struct type * | |
b64f50a1 | 23454 | dwarf2_get_die_type (cu_offset die_offset, |
aa66c379 SM |
23455 | dwarf2_per_cu_data *per_cu, |
23456 | dwarf2_per_objfile *per_objfile) | |
8a9b8146 | 23457 | { |
9c541725 | 23458 | sect_offset die_offset_sect = per_cu->sect_off + to_underlying (die_offset); |
aa66c379 | 23459 | return get_die_type_at_offset (die_offset_sect, per_cu, per_objfile); |
8a9b8146 TT |
23460 | } |
23461 | ||
ac9ec31b | 23462 | /* Follow type unit SIG_TYPE referenced by SRC_DIE. |
348e048f | 23463 | On entry *REF_CU is the CU of SRC_DIE. |
ac9ec31b DE |
23464 | On exit *REF_CU is the CU of the result. |
23465 | Returns NULL if the referenced DIE isn't found. */ | |
348e048f DE |
23466 | |
23467 | static struct die_info * | |
ac9ec31b DE |
23468 | follow_die_sig_1 (struct die_info *src_die, struct signatured_type *sig_type, |
23469 | struct dwarf2_cu **ref_cu) | |
348e048f | 23470 | { |
348e048f | 23471 | struct die_info temp_die; |
3db19b2d | 23472 | struct dwarf2_cu *sig_cu, *cu = *ref_cu; |
348e048f | 23473 | struct die_info *die; |
976ca316 | 23474 | dwarf2_per_objfile *per_objfile = (*ref_cu)->per_objfile; |
120ce1b5 | 23475 | |
348e048f | 23476 | |
ac9ec31b DE |
23477 | /* While it might be nice to assert sig_type->type == NULL here, |
23478 | we can get here for DW_AT_imported_declaration where we need | |
23479 | the DIE not the type. */ | |
348e048f | 23480 | |
616c069a | 23481 | /* If necessary, add it to the queue and load its DIEs. |
348e048f | 23482 | |
616c069a SM |
23483 | Even if maybe_queue_comp_unit doesn't require us to load the CU's DIEs, |
23484 | it doesn't mean they are currently loaded. Since we require them | |
23485 | to be loaded, we must check for ourselves. */ | |
0d305d5c | 23486 | if (maybe_queue_comp_unit (*ref_cu, sig_type, per_objfile, |
616c069a | 23487 | language_minimal) |
0d305d5c | 23488 | || per_objfile->get_cu (sig_type) == nullptr) |
976ca316 | 23489 | read_signatured_type (sig_type, per_objfile); |
348e048f | 23490 | |
0d305d5c | 23491 | sig_cu = per_objfile->get_cu (sig_type); |
69d751e3 | 23492 | gdb_assert (sig_cu != NULL); |
9c541725 PA |
23493 | gdb_assert (to_underlying (sig_type->type_offset_in_section) != 0); |
23494 | temp_die.sect_off = sig_type->type_offset_in_section; | |
9a3c8263 | 23495 | die = (struct die_info *) htab_find_with_hash (sig_cu->die_hash, &temp_die, |
9c541725 | 23496 | to_underlying (temp_die.sect_off)); |
348e048f DE |
23497 | if (die) |
23498 | { | |
796a7ff8 DE |
23499 | /* For .gdb_index version 7 keep track of included TUs. |
23500 | http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */ | |
976ca316 SM |
23501 | if (per_objfile->per_bfd->index_table != NULL |
23502 | && per_objfile->per_bfd->index_table->version <= 7) | |
796a7ff8 | 23503 | { |
ae640021 | 23504 | (*ref_cu)->per_cu->imported_symtabs_push (sig_cu->per_cu); |
796a7ff8 DE |
23505 | } |
23506 | ||
348e048f | 23507 | *ref_cu = sig_cu; |
3db19b2d TV |
23508 | if (sig_cu != cu) |
23509 | sig_cu->ancestor = cu; | |
c24bdb02 | 23510 | |
348e048f DE |
23511 | return die; |
23512 | } | |
23513 | ||
ac9ec31b DE |
23514 | return NULL; |
23515 | } | |
23516 | ||
23517 | /* Follow signatured type referenced by ATTR in SRC_DIE. | |
23518 | On entry *REF_CU is the CU of SRC_DIE. | |
23519 | On exit *REF_CU is the CU of the result. | |
23520 | The result is the DIE of the type. | |
23521 | If the referenced type cannot be found an error is thrown. */ | |
23522 | ||
23523 | static struct die_info * | |
ff39bb5e | 23524 | follow_die_sig (struct die_info *src_die, const struct attribute *attr, |
ac9ec31b DE |
23525 | struct dwarf2_cu **ref_cu) |
23526 | { | |
630ed6b9 | 23527 | ULONGEST signature = attr->as_signature (); |
ac9ec31b DE |
23528 | struct signatured_type *sig_type; |
23529 | struct die_info *die; | |
23530 | ||
23531 | gdb_assert (attr->form == DW_FORM_ref_sig8); | |
23532 | ||
a2ce51a0 | 23533 | sig_type = lookup_signatured_type (*ref_cu, signature); |
ac9ec31b DE |
23534 | /* sig_type will be NULL if the signatured type is missing from |
23535 | the debug info. */ | |
23536 | if (sig_type == NULL) | |
23537 | { | |
23538 | error (_("Dwarf Error: Cannot find signatured DIE %s referenced" | |
dda83cd7 SM |
23539 | " from DIE at %s [in module %s]"), |
23540 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
5e22e966 | 23541 | objfile_name ((*ref_cu)->per_objfile->objfile)); |
ac9ec31b DE |
23542 | } |
23543 | ||
23544 | die = follow_die_sig_1 (src_die, sig_type, ref_cu); | |
23545 | if (die == NULL) | |
23546 | { | |
23547 | dump_die_for_error (src_die); | |
23548 | error (_("Dwarf Error: Problem reading signatured DIE %s referenced" | |
9d8780f0 SM |
23549 | " from DIE at %s [in module %s]"), |
23550 | hex_string (signature), sect_offset_str (src_die->sect_off), | |
5e22e966 | 23551 | objfile_name ((*ref_cu)->per_objfile->objfile)); |
ac9ec31b DE |
23552 | } |
23553 | ||
23554 | return die; | |
23555 | } | |
23556 | ||
23557 | /* Get the type specified by SIGNATURE referenced in DIE/CU, | |
23558 | reading in and processing the type unit if necessary. */ | |
23559 | ||
23560 | static struct type * | |
23561 | get_signatured_type (struct die_info *die, ULONGEST signature, | |
23562 | struct dwarf2_cu *cu) | |
23563 | { | |
976ca316 | 23564 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ac9ec31b DE |
23565 | struct signatured_type *sig_type; |
23566 | struct dwarf2_cu *type_cu; | |
23567 | struct die_info *type_die; | |
23568 | struct type *type; | |
23569 | ||
a2ce51a0 | 23570 | sig_type = lookup_signatured_type (cu, signature); |
ac9ec31b DE |
23571 | /* sig_type will be NULL if the signatured type is missing from |
23572 | the debug info. */ | |
23573 | if (sig_type == NULL) | |
23574 | { | |
b98664d3 | 23575 | complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced" |
9d8780f0 SM |
23576 | " from DIE at %s [in module %s]"), |
23577 | hex_string (signature), sect_offset_str (die->sect_off), | |
976ca316 | 23578 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23579 | return build_error_marker_type (cu, die); |
23580 | } | |
23581 | ||
23582 | /* If we already know the type we're done. */ | |
976ca316 | 23583 | type = per_objfile->get_type_for_signatured_type (sig_type); |
e286671b TT |
23584 | if (type != nullptr) |
23585 | return type; | |
ac9ec31b DE |
23586 | |
23587 | type_cu = cu; | |
23588 | type_die = follow_die_sig_1 (die, sig_type, &type_cu); | |
23589 | if (type_die != NULL) | |
23590 | { | |
23591 | /* N.B. We need to call get_die_type to ensure only one type for this DIE | |
23592 | is created. This is important, for example, because for c++ classes | |
23593 | we need TYPE_NAME set which is only done by new_symbol. Blech. */ | |
23594 | type = read_type_die (type_die, type_cu); | |
23595 | if (type == NULL) | |
23596 | { | |
b98664d3 | 23597 | complaint (_("Dwarf Error: Cannot build signatured type %s" |
9d8780f0 SM |
23598 | " referenced from DIE at %s [in module %s]"), |
23599 | hex_string (signature), sect_offset_str (die->sect_off), | |
976ca316 | 23600 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23601 | type = build_error_marker_type (cu, die); |
23602 | } | |
23603 | } | |
23604 | else | |
23605 | { | |
b98664d3 | 23606 | complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced" |
9d8780f0 SM |
23607 | " from DIE at %s [in module %s]"), |
23608 | hex_string (signature), sect_offset_str (die->sect_off), | |
976ca316 | 23609 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23610 | type = build_error_marker_type (cu, die); |
23611 | } | |
e286671b | 23612 | |
976ca316 | 23613 | per_objfile->set_type_for_signatured_type (sig_type, type); |
ac9ec31b DE |
23614 | |
23615 | return type; | |
23616 | } | |
23617 | ||
23618 | /* Get the type specified by the DW_AT_signature ATTR in DIE/CU, | |
23619 | reading in and processing the type unit if necessary. */ | |
23620 | ||
23621 | static struct type * | |
ff39bb5e | 23622 | get_DW_AT_signature_type (struct die_info *die, const struct attribute *attr, |
b385a60d | 23623 | struct dwarf2_cu *cu) /* ARI: editCase function */ |
ac9ec31b DE |
23624 | { |
23625 | /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */ | |
cd6c91b4 | 23626 | if (attr->form_is_ref ()) |
ac9ec31b DE |
23627 | { |
23628 | struct dwarf2_cu *type_cu = cu; | |
23629 | struct die_info *type_die = follow_die_ref (die, attr, &type_cu); | |
23630 | ||
23631 | return read_type_die (type_die, type_cu); | |
23632 | } | |
23633 | else if (attr->form == DW_FORM_ref_sig8) | |
23634 | { | |
630ed6b9 | 23635 | return get_signatured_type (die, attr->as_signature (), cu); |
ac9ec31b DE |
23636 | } |
23637 | else | |
23638 | { | |
976ca316 | 23639 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ed2dc618 | 23640 | |
b98664d3 | 23641 | complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE" |
9d8780f0 SM |
23642 | " at %s [in module %s]"), |
23643 | dwarf_form_name (attr->form), sect_offset_str (die->sect_off), | |
976ca316 | 23644 | objfile_name (per_objfile->objfile)); |
ac9ec31b DE |
23645 | return build_error_marker_type (cu, die); |
23646 | } | |
348e048f DE |
23647 | } |
23648 | ||
e5fe5e75 | 23649 | /* Load the DIEs associated with type unit PER_CU into memory. */ |
348e048f DE |
23650 | |
23651 | static void | |
ab432490 SM |
23652 | load_full_type_unit (dwarf2_per_cu_data *per_cu, |
23653 | dwarf2_per_objfile *per_objfile) | |
348e048f | 23654 | { |
52dc124a | 23655 | struct signatured_type *sig_type; |
348e048f | 23656 | |
f4dc4d17 | 23657 | /* Caller is responsible for ensuring type_unit_groups don't get here. */ |
197400e8 | 23658 | gdb_assert (! per_cu->type_unit_group_p ()); |
f4dc4d17 | 23659 | |
6721b2ec DE |
23660 | /* We have the per_cu, but we need the signatured_type. |
23661 | Fortunately this is an easy translation. */ | |
23662 | gdb_assert (per_cu->is_debug_types); | |
23663 | sig_type = (struct signatured_type *) per_cu; | |
348e048f | 23664 | |
7188ed02 | 23665 | gdb_assert (per_objfile->get_cu (per_cu) == nullptr); |
348e048f | 23666 | |
ab432490 | 23667 | read_signatured_type (sig_type, per_objfile); |
348e048f | 23668 | |
7188ed02 | 23669 | gdb_assert (per_objfile->get_cu (per_cu) != nullptr); |
348e048f DE |
23670 | } |
23671 | ||
3019eac3 DE |
23672 | /* Read in a signatured type and build its CU and DIEs. |
23673 | If the type is a stub for the real type in a DWO file, | |
23674 | read in the real type from the DWO file as well. */ | |
dee91e82 DE |
23675 | |
23676 | static void | |
ab432490 SM |
23677 | read_signatured_type (signatured_type *sig_type, |
23678 | dwarf2_per_objfile *per_objfile) | |
dee91e82 | 23679 | { |
0d305d5c TT |
23680 | gdb_assert (sig_type->is_debug_types); |
23681 | gdb_assert (per_objfile->get_cu (sig_type) == nullptr); | |
348e048f | 23682 | |
0d305d5c | 23683 | cutu_reader reader (sig_type, per_objfile, nullptr, nullptr, false); |
c0ab21c2 TT |
23684 | |
23685 | if (!reader.dummy_p) | |
23686 | { | |
23687 | struct dwarf2_cu *cu = reader.cu; | |
23688 | const gdb_byte *info_ptr = reader.info_ptr; | |
23689 | ||
23690 | gdb_assert (cu->die_hash == NULL); | |
23691 | cu->die_hash = | |
23692 | htab_create_alloc_ex (cu->header.length / 12, | |
23693 | die_hash, | |
23694 | die_eq, | |
23695 | NULL, | |
23696 | &cu->comp_unit_obstack, | |
23697 | hashtab_obstack_allocate, | |
23698 | dummy_obstack_deallocate); | |
23699 | ||
3e225074 | 23700 | if (reader.comp_unit_die->has_children) |
c0ab21c2 TT |
23701 | reader.comp_unit_die->child |
23702 | = read_die_and_siblings (&reader, info_ptr, &info_ptr, | |
23703 | reader.comp_unit_die); | |
23704 | cu->dies = reader.comp_unit_die; | |
23705 | /* comp_unit_die is not stored in die_hash, no need. */ | |
23706 | ||
23707 | /* We try not to read any attributes in this function, because | |
23708 | not all CUs needed for references have been loaded yet, and | |
23709 | symbol table processing isn't initialized. But we have to | |
23710 | set the CU language, or we won't be able to build types | |
23711 | correctly. Similarly, if we do not read the producer, we can | |
23712 | not apply producer-specific interpretation. */ | |
23713 | prepare_one_comp_unit (cu, cu->dies, language_minimal); | |
6751ebae TT |
23714 | |
23715 | reader.keep (); | |
c0ab21c2 TT |
23716 | } |
23717 | ||
0d305d5c | 23718 | sig_type->tu_read = 1; |
c906108c SS |
23719 | } |
23720 | ||
c906108c SS |
23721 | /* Decode simple location descriptions. |
23722 | Given a pointer to a dwarf block that defines a location, compute | |
7d79de9a TT |
23723 | the location and return the value. If COMPUTED is non-null, it is |
23724 | set to true to indicate that decoding was successful, and false | |
23725 | otherwise. If COMPUTED is null, then this function may emit a | |
23726 | complaint. */ | |
c906108c SS |
23727 | |
23728 | static CORE_ADDR | |
7d79de9a | 23729 | decode_locdesc (struct dwarf_block *blk, struct dwarf2_cu *cu, bool *computed) |
c906108c | 23730 | { |
5e22e966 | 23731 | struct objfile *objfile = cu->per_objfile->objfile; |
56eb65bd SP |
23732 | size_t i; |
23733 | size_t size = blk->size; | |
d521ce57 | 23734 | const gdb_byte *data = blk->data; |
21ae7a4d JK |
23735 | CORE_ADDR stack[64]; |
23736 | int stacki; | |
23737 | unsigned int bytes_read, unsnd; | |
23738 | gdb_byte op; | |
c906108c | 23739 | |
7d79de9a TT |
23740 | if (computed != nullptr) |
23741 | *computed = false; | |
23742 | ||
21ae7a4d JK |
23743 | i = 0; |
23744 | stacki = 0; | |
23745 | stack[stacki] = 0; | |
23746 | stack[++stacki] = 0; | |
23747 | ||
23748 | while (i < size) | |
23749 | { | |
23750 | op = data[i++]; | |
23751 | switch (op) | |
23752 | { | |
23753 | case DW_OP_lit0: | |
23754 | case DW_OP_lit1: | |
23755 | case DW_OP_lit2: | |
23756 | case DW_OP_lit3: | |
23757 | case DW_OP_lit4: | |
23758 | case DW_OP_lit5: | |
23759 | case DW_OP_lit6: | |
23760 | case DW_OP_lit7: | |
23761 | case DW_OP_lit8: | |
23762 | case DW_OP_lit9: | |
23763 | case DW_OP_lit10: | |
23764 | case DW_OP_lit11: | |
23765 | case DW_OP_lit12: | |
23766 | case DW_OP_lit13: | |
23767 | case DW_OP_lit14: | |
23768 | case DW_OP_lit15: | |
23769 | case DW_OP_lit16: | |
23770 | case DW_OP_lit17: | |
23771 | case DW_OP_lit18: | |
23772 | case DW_OP_lit19: | |
23773 | case DW_OP_lit20: | |
23774 | case DW_OP_lit21: | |
23775 | case DW_OP_lit22: | |
23776 | case DW_OP_lit23: | |
23777 | case DW_OP_lit24: | |
23778 | case DW_OP_lit25: | |
23779 | case DW_OP_lit26: | |
23780 | case DW_OP_lit27: | |
23781 | case DW_OP_lit28: | |
23782 | case DW_OP_lit29: | |
23783 | case DW_OP_lit30: | |
23784 | case DW_OP_lit31: | |
23785 | stack[++stacki] = op - DW_OP_lit0; | |
23786 | break; | |
f1bea926 | 23787 | |
21ae7a4d JK |
23788 | case DW_OP_reg0: |
23789 | case DW_OP_reg1: | |
23790 | case DW_OP_reg2: | |
23791 | case DW_OP_reg3: | |
23792 | case DW_OP_reg4: | |
23793 | case DW_OP_reg5: | |
23794 | case DW_OP_reg6: | |
23795 | case DW_OP_reg7: | |
23796 | case DW_OP_reg8: | |
23797 | case DW_OP_reg9: | |
23798 | case DW_OP_reg10: | |
23799 | case DW_OP_reg11: | |
23800 | case DW_OP_reg12: | |
23801 | case DW_OP_reg13: | |
23802 | case DW_OP_reg14: | |
23803 | case DW_OP_reg15: | |
23804 | case DW_OP_reg16: | |
23805 | case DW_OP_reg17: | |
23806 | case DW_OP_reg18: | |
23807 | case DW_OP_reg19: | |
23808 | case DW_OP_reg20: | |
23809 | case DW_OP_reg21: | |
23810 | case DW_OP_reg22: | |
23811 | case DW_OP_reg23: | |
23812 | case DW_OP_reg24: | |
23813 | case DW_OP_reg25: | |
23814 | case DW_OP_reg26: | |
23815 | case DW_OP_reg27: | |
23816 | case DW_OP_reg28: | |
23817 | case DW_OP_reg29: | |
23818 | case DW_OP_reg30: | |
23819 | case DW_OP_reg31: | |
23820 | stack[++stacki] = op - DW_OP_reg0; | |
23821 | if (i < size) | |
7d79de9a TT |
23822 | { |
23823 | if (computed == nullptr) | |
23824 | dwarf2_complex_location_expr_complaint (); | |
23825 | else | |
23826 | return 0; | |
23827 | } | |
21ae7a4d | 23828 | break; |
c906108c | 23829 | |
21ae7a4d JK |
23830 | case DW_OP_regx: |
23831 | unsnd = read_unsigned_leb128 (NULL, (data + i), &bytes_read); | |
23832 | i += bytes_read; | |
23833 | stack[++stacki] = unsnd; | |
23834 | if (i < size) | |
7d79de9a TT |
23835 | { |
23836 | if (computed == nullptr) | |
23837 | dwarf2_complex_location_expr_complaint (); | |
23838 | else | |
23839 | return 0; | |
23840 | } | |
21ae7a4d | 23841 | break; |
c906108c | 23842 | |
21ae7a4d | 23843 | case DW_OP_addr: |
c8a7a66f TT |
23844 | stack[++stacki] = cu->header.read_address (objfile->obfd, &data[i], |
23845 | &bytes_read); | |
21ae7a4d JK |
23846 | i += bytes_read; |
23847 | break; | |
d53d4ac5 | 23848 | |
21ae7a4d JK |
23849 | case DW_OP_const1u: |
23850 | stack[++stacki] = read_1_byte (objfile->obfd, &data[i]); | |
23851 | i += 1; | |
23852 | break; | |
23853 | ||
23854 | case DW_OP_const1s: | |
23855 | stack[++stacki] = read_1_signed_byte (objfile->obfd, &data[i]); | |
23856 | i += 1; | |
23857 | break; | |
23858 | ||
23859 | case DW_OP_const2u: | |
23860 | stack[++stacki] = read_2_bytes (objfile->obfd, &data[i]); | |
23861 | i += 2; | |
23862 | break; | |
23863 | ||
23864 | case DW_OP_const2s: | |
23865 | stack[++stacki] = read_2_signed_bytes (objfile->obfd, &data[i]); | |
23866 | i += 2; | |
23867 | break; | |
d53d4ac5 | 23868 | |
21ae7a4d JK |
23869 | case DW_OP_const4u: |
23870 | stack[++stacki] = read_4_bytes (objfile->obfd, &data[i]); | |
23871 | i += 4; | |
23872 | break; | |
23873 | ||
23874 | case DW_OP_const4s: | |
23875 | stack[++stacki] = read_4_signed_bytes (objfile->obfd, &data[i]); | |
23876 | i += 4; | |
23877 | break; | |
23878 | ||
585861ea JK |
23879 | case DW_OP_const8u: |
23880 | stack[++stacki] = read_8_bytes (objfile->obfd, &data[i]); | |
23881 | i += 8; | |
23882 | break; | |
23883 | ||
21ae7a4d JK |
23884 | case DW_OP_constu: |
23885 | stack[++stacki] = read_unsigned_leb128 (NULL, (data + i), | |
23886 | &bytes_read); | |
23887 | i += bytes_read; | |
23888 | break; | |
23889 | ||
23890 | case DW_OP_consts: | |
23891 | stack[++stacki] = read_signed_leb128 (NULL, (data + i), &bytes_read); | |
23892 | i += bytes_read; | |
23893 | break; | |
23894 | ||
23895 | case DW_OP_dup: | |
23896 | stack[stacki + 1] = stack[stacki]; | |
23897 | stacki++; | |
23898 | break; | |
23899 | ||
23900 | case DW_OP_plus: | |
23901 | stack[stacki - 1] += stack[stacki]; | |
23902 | stacki--; | |
23903 | break; | |
23904 | ||
23905 | case DW_OP_plus_uconst: | |
23906 | stack[stacki] += read_unsigned_leb128 (NULL, (data + i), | |
23907 | &bytes_read); | |
23908 | i += bytes_read; | |
23909 | break; | |
23910 | ||
23911 | case DW_OP_minus: | |
23912 | stack[stacki - 1] -= stack[stacki]; | |
23913 | stacki--; | |
23914 | break; | |
23915 | ||
23916 | case DW_OP_deref: | |
23917 | /* If we're not the last op, then we definitely can't encode | |
23918 | this using GDB's address_class enum. This is valid for partial | |
23919 | global symbols, although the variable's address will be bogus | |
23920 | in the psymtab. */ | |
23921 | if (i < size) | |
7d79de9a TT |
23922 | { |
23923 | if (computed == nullptr) | |
23924 | dwarf2_complex_location_expr_complaint (); | |
23925 | else | |
23926 | return 0; | |
23927 | } | |
21ae7a4d JK |
23928 | break; |
23929 | ||
dda83cd7 | 23930 | case DW_OP_GNU_push_tls_address: |
4aa4e28b | 23931 | case DW_OP_form_tls_address: |
21ae7a4d JK |
23932 | /* The top of the stack has the offset from the beginning |
23933 | of the thread control block at which the variable is located. */ | |
23934 | /* Nothing should follow this operator, so the top of stack would | |
23935 | be returned. */ | |
23936 | /* This is valid for partial global symbols, but the variable's | |
585861ea JK |
23937 | address will be bogus in the psymtab. Make it always at least |
23938 | non-zero to not look as a variable garbage collected by linker | |
23939 | which have DW_OP_addr 0. */ | |
21ae7a4d | 23940 | if (i < size) |
7d79de9a TT |
23941 | { |
23942 | if (computed == nullptr) | |
23943 | dwarf2_complex_location_expr_complaint (); | |
23944 | else | |
23945 | return 0; | |
23946 | } | |
585861ea | 23947 | stack[stacki]++; |
dda83cd7 | 23948 | break; |
21ae7a4d JK |
23949 | |
23950 | case DW_OP_GNU_uninit: | |
7d79de9a TT |
23951 | if (computed != nullptr) |
23952 | return 0; | |
21ae7a4d JK |
23953 | break; |
23954 | ||
336d760d | 23955 | case DW_OP_addrx: |
3019eac3 | 23956 | case DW_OP_GNU_addr_index: |
49f6c839 | 23957 | case DW_OP_GNU_const_index: |
3019eac3 DE |
23958 | stack[++stacki] = read_addr_index_from_leb128 (cu, &data[i], |
23959 | &bytes_read); | |
23960 | i += bytes_read; | |
23961 | break; | |
23962 | ||
21ae7a4d | 23963 | default: |
7d79de9a TT |
23964 | if (computed == nullptr) |
23965 | { | |
23966 | const char *name = get_DW_OP_name (op); | |
21ae7a4d | 23967 | |
7d79de9a TT |
23968 | if (name) |
23969 | complaint (_("unsupported stack op: '%s'"), | |
23970 | name); | |
23971 | else | |
23972 | complaint (_("unsupported stack op: '%02x'"), | |
23973 | op); | |
23974 | } | |
21ae7a4d JK |
23975 | |
23976 | return (stack[stacki]); | |
d53d4ac5 | 23977 | } |
3c6e0cb3 | 23978 | |
21ae7a4d | 23979 | /* Enforce maximum stack depth of SIZE-1 to avoid writing |
dda83cd7 | 23980 | outside of the allocated space. Also enforce minimum>0. */ |
21ae7a4d JK |
23981 | if (stacki >= ARRAY_SIZE (stack) - 1) |
23982 | { | |
7d79de9a TT |
23983 | if (computed == nullptr) |
23984 | complaint (_("location description stack overflow")); | |
21ae7a4d JK |
23985 | return 0; |
23986 | } | |
23987 | ||
23988 | if (stacki <= 0) | |
23989 | { | |
7d79de9a TT |
23990 | if (computed == nullptr) |
23991 | complaint (_("location description stack underflow")); | |
21ae7a4d JK |
23992 | return 0; |
23993 | } | |
23994 | } | |
7d79de9a TT |
23995 | |
23996 | if (computed != nullptr) | |
23997 | *computed = true; | |
21ae7a4d | 23998 | return (stack[stacki]); |
c906108c SS |
23999 | } |
24000 | ||
24001 | /* memory allocation interface */ | |
24002 | ||
c906108c | 24003 | static struct dwarf_block * |
7b5a2f43 | 24004 | dwarf_alloc_block (struct dwarf2_cu *cu) |
c906108c | 24005 | { |
8d749320 | 24006 | return XOBNEW (&cu->comp_unit_obstack, struct dwarf_block); |
c906108c SS |
24007 | } |
24008 | ||
c906108c | 24009 | static struct die_info * |
b60c80d6 | 24010 | dwarf_alloc_die (struct dwarf2_cu *cu, int num_attrs) |
c906108c SS |
24011 | { |
24012 | struct die_info *die; | |
b60c80d6 DJ |
24013 | size_t size = sizeof (struct die_info); |
24014 | ||
24015 | if (num_attrs > 1) | |
24016 | size += (num_attrs - 1) * sizeof (struct attribute); | |
c906108c | 24017 | |
b60c80d6 | 24018 | die = (struct die_info *) obstack_alloc (&cu->comp_unit_obstack, size); |
c906108c SS |
24019 | memset (die, 0, sizeof (struct die_info)); |
24020 | return (die); | |
24021 | } | |
2e276125 JB |
24022 | |
24023 | \f | |
a036ba48 | 24024 | |
c90ec28a | 24025 | /* Macro support. */ |
cf2c3c16 | 24026 | |
9eac9650 TT |
24027 | /* An overload of dwarf_decode_macros that finds the correct section |
24028 | and ensures it is read in before calling the other overload. */ | |
24029 | ||
24030 | static void | |
24031 | dwarf_decode_macros (struct dwarf2_cu *cu, unsigned int offset, | |
24032 | int section_is_gnu) | |
24033 | { | |
976ca316 SM |
24034 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
24035 | struct objfile *objfile = per_objfile->objfile; | |
5a0e026f | 24036 | const struct line_header *lh = cu->line_header; |
9eac9650 TT |
24037 | unsigned int offset_size = cu->header.offset_size; |
24038 | struct dwarf2_section_info *section; | |
24039 | const char *section_name; | |
24040 | ||
24041 | if (cu->dwo_unit != nullptr) | |
24042 | { | |
24043 | if (section_is_gnu) | |
24044 | { | |
24045 | section = &cu->dwo_unit->dwo_file->sections.macro; | |
24046 | section_name = ".debug_macro.dwo"; | |
24047 | } | |
24048 | else | |
24049 | { | |
24050 | section = &cu->dwo_unit->dwo_file->sections.macinfo; | |
24051 | section_name = ".debug_macinfo.dwo"; | |
24052 | } | |
24053 | } | |
24054 | else | |
24055 | { | |
24056 | if (section_is_gnu) | |
24057 | { | |
976ca316 | 24058 | section = &per_objfile->per_bfd->macro; |
9eac9650 TT |
24059 | section_name = ".debug_macro"; |
24060 | } | |
24061 | else | |
24062 | { | |
976ca316 | 24063 | section = &per_objfile->per_bfd->macinfo; |
9eac9650 TT |
24064 | section_name = ".debug_macinfo"; |
24065 | } | |
24066 | } | |
24067 | ||
24068 | section->read (objfile); | |
24069 | if (section->buffer == nullptr) | |
24070 | { | |
24071 | complaint (_("missing %s section"), section_name); | |
24072 | return; | |
24073 | } | |
24074 | ||
24075 | buildsym_compunit *builder = cu->get_builder (); | |
24076 | ||
048fde1e | 24077 | struct dwarf2_section_info *str_offsets_section; |
24078 | struct dwarf2_section_info *str_section; | |
24079 | ULONGEST str_offsets_base; | |
24080 | ||
24081 | if (cu->dwo_unit != nullptr) | |
24082 | { | |
24083 | str_offsets_section = &cu->dwo_unit->dwo_file | |
24084 | ->sections.str_offsets; | |
24085 | str_section = &cu->dwo_unit->dwo_file->sections.str; | |
24086 | str_offsets_base = cu->header.addr_size; | |
24087 | } | |
24088 | else | |
24089 | { | |
24090 | str_offsets_section = &per_objfile->per_bfd->str_offsets; | |
24091 | str_section = &per_objfile->per_bfd->str; | |
24092 | str_offsets_base = *cu->str_offsets_base; | |
24093 | } | |
24094 | ||
976ca316 | 24095 | dwarf_decode_macros (per_objfile, builder, section, lh, |
048fde1e | 24096 | offset_size, offset, str_section, str_offsets_section, |
24097 | str_offsets_base, section_is_gnu); | |
9eac9650 TT |
24098 | } |
24099 | ||
3019eac3 DE |
24100 | /* Return the .debug_loc section to use for CU. |
24101 | For DWO files use .debug_loc.dwo. */ | |
24102 | ||
24103 | static struct dwarf2_section_info * | |
24104 | cu_debug_loc_section (struct dwarf2_cu *cu) | |
24105 | { | |
976ca316 | 24106 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
ed2dc618 | 24107 | |
3019eac3 | 24108 | if (cu->dwo_unit) |
43988095 JK |
24109 | { |
24110 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
5f48f8f3 | 24111 | |
43988095 JK |
24112 | return cu->header.version >= 5 ? §ions->loclists : §ions->loc; |
24113 | } | |
976ca316 SM |
24114 | return (cu->header.version >= 5 ? &per_objfile->per_bfd->loclists |
24115 | : &per_objfile->per_bfd->loc); | |
3019eac3 DE |
24116 | } |
24117 | ||
d0ce17d8 CT |
24118 | /* Return the .debug_rnglists section to use for CU. */ |
24119 | static struct dwarf2_section_info * | |
24120 | cu_debug_rnglists_section (struct dwarf2_cu *cu, dwarf_tag tag) | |
24121 | { | |
24122 | if (cu->header.version < 5) | |
24123 | error (_(".debug_rnglists section cannot be used in DWARF %d"), | |
24124 | cu->header.version); | |
24125 | struct dwarf2_per_objfile *dwarf2_per_objfile = cu->per_objfile; | |
24126 | ||
24127 | /* Make sure we read the .debug_rnglists section from the file that | |
24128 | contains the DW_AT_ranges attribute we are reading. Normally that | |
24129 | would be the .dwo file, if there is one. However for DW_TAG_compile_unit | |
24130 | or DW_TAG_skeleton unit, we always want to read from objfile/linked | |
24131 | program. */ | |
24132 | if (cu->dwo_unit != nullptr | |
24133 | && tag != DW_TAG_compile_unit | |
24134 | && tag != DW_TAG_skeleton_unit) | |
24135 | { | |
24136 | struct dwo_sections *sections = &cu->dwo_unit->dwo_file->sections; | |
24137 | ||
24138 | if (sections->rnglists.size > 0) | |
24139 | return §ions->rnglists; | |
24140 | else | |
24141 | error (_(".debug_rnglists section is missing from .dwo file.")); | |
24142 | } | |
24143 | return &dwarf2_per_objfile->per_bfd->rnglists; | |
24144 | } | |
24145 | ||
8cf6f0b1 TT |
24146 | /* A helper function that fills in a dwarf2_loclist_baton. */ |
24147 | ||
24148 | static void | |
24149 | fill_in_loclist_baton (struct dwarf2_cu *cu, | |
24150 | struct dwarf2_loclist_baton *baton, | |
ff39bb5e | 24151 | const struct attribute *attr) |
8cf6f0b1 | 24152 | { |
976ca316 | 24153 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
3019eac3 DE |
24154 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
24155 | ||
976ca316 | 24156 | section->read (per_objfile->objfile); |
8cf6f0b1 | 24157 | |
976ca316 | 24158 | baton->per_objfile = per_objfile; |
8cf6f0b1 TT |
24159 | baton->per_cu = cu->per_cu; |
24160 | gdb_assert (baton->per_cu); | |
24161 | /* We don't know how long the location list is, but make sure we | |
24162 | don't run off the edge of the section. */ | |
d4df075e TT |
24163 | baton->size = section->size - attr->as_unsigned (); |
24164 | baton->data = section->buffer + attr->as_unsigned (); | |
2b24b6e4 TT |
24165 | if (cu->base_address.has_value ()) |
24166 | baton->base_address = *cu->base_address; | |
24167 | else | |
24168 | baton->base_address = 0; | |
f664829e | 24169 | baton->from_dwo = cu->dwo_unit != NULL; |
8cf6f0b1 TT |
24170 | } |
24171 | ||
4c2df51b | 24172 | static void |
ff39bb5e | 24173 | dwarf2_symbol_mark_computed (const struct attribute *attr, struct symbol *sym, |
f1e6e072 | 24174 | struct dwarf2_cu *cu, int is_block) |
4c2df51b | 24175 | { |
976ca316 SM |
24176 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
24177 | struct objfile *objfile = per_objfile->objfile; | |
3019eac3 | 24178 | struct dwarf2_section_info *section = cu_debug_loc_section (cu); |
bb5ed363 | 24179 | |
cd6c91b4 | 24180 | if (attr->form_is_section_offset () |
3019eac3 | 24181 | /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside |
99bcc461 DJ |
24182 | the section. If so, fall through to the complaint in the |
24183 | other branch. */ | |
d4df075e | 24184 | && attr->as_unsigned () < section->get_size (objfile)) |
4c2df51b | 24185 | { |
0d53c4c4 | 24186 | struct dwarf2_loclist_baton *baton; |
4c2df51b | 24187 | |
8d749320 | 24188 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_loclist_baton); |
4c2df51b | 24189 | |
8cf6f0b1 | 24190 | fill_in_loclist_baton (cu, baton, attr); |
be391dca | 24191 | |
2b24b6e4 | 24192 | if (!cu->base_address.has_value ()) |
b98664d3 | 24193 | complaint (_("Location list used without " |
3e43a32a | 24194 | "specifying the CU base address.")); |
4c2df51b | 24195 | |
f1e6e072 TT |
24196 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24197 | ? dwarf2_loclist_block_index | |
24198 | : dwarf2_loclist_index); | |
0d53c4c4 DJ |
24199 | SYMBOL_LOCATION_BATON (sym) = baton; |
24200 | } | |
24201 | else | |
24202 | { | |
24203 | struct dwarf2_locexpr_baton *baton; | |
24204 | ||
8d749320 | 24205 | baton = XOBNEW (&objfile->objfile_obstack, struct dwarf2_locexpr_baton); |
976ca316 | 24206 | baton->per_objfile = per_objfile; |
ae0d2f24 UW |
24207 | baton->per_cu = cu->per_cu; |
24208 | gdb_assert (baton->per_cu); | |
0d53c4c4 | 24209 | |
4fc6c0d5 | 24210 | if (attr->form_is_block ()) |
0d53c4c4 DJ |
24211 | { |
24212 | /* Note that we're just copying the block's data pointer | |
24213 | here, not the actual data. We're still pointing into the | |
6502dd73 DJ |
24214 | info_buffer for SYM's objfile; right now we never release |
24215 | that buffer, but when we do clean up properly this may | |
24216 | need to change. */ | |
9d2246fc TT |
24217 | struct dwarf_block *block = attr->as_block (); |
24218 | baton->size = block->size; | |
24219 | baton->data = block->data; | |
0d53c4c4 DJ |
24220 | } |
24221 | else | |
24222 | { | |
24223 | dwarf2_invalid_attrib_class_complaint ("location description", | |
987012b8 | 24224 | sym->natural_name ()); |
0d53c4c4 | 24225 | baton->size = 0; |
0d53c4c4 | 24226 | } |
6e70227d | 24227 | |
f1e6e072 TT |
24228 | SYMBOL_ACLASS_INDEX (sym) = (is_block |
24229 | ? dwarf2_locexpr_block_index | |
24230 | : dwarf2_locexpr_index); | |
0d53c4c4 DJ |
24231 | SYMBOL_LOCATION_BATON (sym) = baton; |
24232 | } | |
4c2df51b | 24233 | } |
6502dd73 | 24234 | |
2e6a9f79 | 24235 | /* See read.h. */ |
96408a79 | 24236 | |
2e6a9f79 SM |
24237 | const comp_unit_head * |
24238 | dwarf2_per_cu_data::get_header () const | |
96408a79 | 24239 | { |
2e6a9f79 SM |
24240 | if (!m_header_read_in) |
24241 | { | |
24242 | const gdb_byte *info_ptr | |
24243 | = this->section->buffer + to_underlying (this->sect_off); | |
96408a79 | 24244 | |
2e6a9f79 | 24245 | memset (&m_header, 0, sizeof (m_header)); |
96408a79 | 24246 | |
2e6a9f79 SM |
24247 | read_comp_unit_head (&m_header, info_ptr, this->section, |
24248 | rcuh_kind::COMPILE); | |
a9f172c6 TT |
24249 | |
24250 | m_header_read_in = true; | |
2e6a9f79 | 24251 | } |
96408a79 | 24252 | |
2e6a9f79 | 24253 | return &m_header; |
96408a79 SA |
24254 | } |
24255 | ||
09ba997f | 24256 | /* See read.h. */ |
ae0d2f24 | 24257 | |
98714339 | 24258 | int |
09ba997f | 24259 | dwarf2_per_cu_data::addr_size () const |
ae0d2f24 | 24260 | { |
2e6a9f79 | 24261 | return this->get_header ()->addr_size; |
ae0d2f24 UW |
24262 | } |
24263 | ||
09ba997f | 24264 | /* See read.h. */ |
9eae7c52 TT |
24265 | |
24266 | int | |
09ba997f | 24267 | dwarf2_per_cu_data::offset_size () const |
9eae7c52 | 24268 | { |
2e6a9f79 | 24269 | return this->get_header ()->offset_size; |
96408a79 SA |
24270 | } |
24271 | ||
09ba997f | 24272 | /* See read.h. */ |
96408a79 SA |
24273 | |
24274 | int | |
09ba997f | 24275 | dwarf2_per_cu_data::ref_addr_size () const |
96408a79 | 24276 | { |
2e6a9f79 | 24277 | const comp_unit_head *header = this->get_header (); |
96408a79 | 24278 | |
2e6a9f79 SM |
24279 | if (header->version == 2) |
24280 | return header->addr_size; | |
96408a79 | 24281 | else |
2e6a9f79 | 24282 | return header->offset_size; |
181cebd4 JK |
24283 | } |
24284 | ||
22b6cd70 TT |
24285 | /* A helper function for dwarf2_find_containing_comp_unit that returns |
24286 | the index of the result, and that searches a vector. It will | |
24287 | return a result even if the offset in question does not actually | |
24288 | occur in any CU. This is separate so that it can be unit | |
24289 | tested. */ | |
ae038cb0 | 24290 | |
22b6cd70 TT |
24291 | static int |
24292 | dwarf2_find_containing_comp_unit | |
24293 | (sect_offset sect_off, | |
24294 | unsigned int offset_in_dwz, | |
473ab964 | 24295 | const std::vector<dwarf2_per_cu_data_up> &all_comp_units) |
ae038cb0 | 24296 | { |
ae038cb0 DJ |
24297 | int low, high; |
24298 | ||
ae038cb0 | 24299 | low = 0; |
22b6cd70 | 24300 | high = all_comp_units.size () - 1; |
ae038cb0 DJ |
24301 | while (high > low) |
24302 | { | |
36586728 | 24303 | struct dwarf2_per_cu_data *mid_cu; |
ae038cb0 | 24304 | int mid = low + (high - low) / 2; |
9a619af0 | 24305 | |
0d305d5c | 24306 | mid_cu = all_comp_units[mid].get (); |
36586728 | 24307 | if (mid_cu->is_dwz > offset_in_dwz |
81fbbaf9 | 24308 | || (mid_cu->is_dwz == offset_in_dwz |
22b6cd70 | 24309 | && mid_cu->sect_off + mid_cu->length > sect_off)) |
ae038cb0 DJ |
24310 | high = mid; |
24311 | else | |
24312 | low = mid + 1; | |
24313 | } | |
24314 | gdb_assert (low == high); | |
22b6cd70 TT |
24315 | return low; |
24316 | } | |
24317 | ||
24318 | /* Locate the .debug_info compilation unit from CU's objfile which contains | |
24319 | the DIE at OFFSET. Raises an error on failure. */ | |
24320 | ||
24321 | static struct dwarf2_per_cu_data * | |
24322 | dwarf2_find_containing_comp_unit (sect_offset sect_off, | |
24323 | unsigned int offset_in_dwz, | |
976ca316 | 24324 | dwarf2_per_objfile *per_objfile) |
22b6cd70 | 24325 | { |
976ca316 SM |
24326 | int low = dwarf2_find_containing_comp_unit |
24327 | (sect_off, offset_in_dwz, per_objfile->per_bfd->all_comp_units); | |
0d305d5c TT |
24328 | dwarf2_per_cu_data *this_cu |
24329 | = per_objfile->per_bfd->all_comp_units[low].get (); | |
22b6cd70 | 24330 | |
45b8ae0c | 24331 | if (this_cu->is_dwz != offset_in_dwz || this_cu->sect_off > sect_off) |
ae038cb0 | 24332 | { |
36586728 | 24333 | if (low == 0 || this_cu->is_dwz != offset_in_dwz) |
8a3fe4f8 | 24334 | error (_("Dwarf Error: could not find partial DIE containing " |
9d8780f0 SM |
24335 | "offset %s [in module %s]"), |
24336 | sect_offset_str (sect_off), | |
976ca316 | 24337 | bfd_get_filename (per_objfile->objfile->obfd)); |
10b3939b | 24338 | |
976ca316 | 24339 | gdb_assert (per_objfile->per_bfd->all_comp_units[low-1]->sect_off |
9c541725 | 24340 | <= sect_off); |
0d305d5c | 24341 | return per_objfile->per_bfd->all_comp_units[low - 1].get (); |
ae038cb0 DJ |
24342 | } |
24343 | else | |
24344 | { | |
976ca316 | 24345 | if (low == per_objfile->per_bfd->all_comp_units.size () - 1 |
9c541725 | 24346 | && sect_off >= this_cu->sect_off + this_cu->length) |
9d8780f0 | 24347 | error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off)); |
9c541725 | 24348 | gdb_assert (sect_off < this_cu->sect_off + this_cu->length); |
ae038cb0 DJ |
24349 | return this_cu; |
24350 | } | |
24351 | } | |
24352 | ||
22b6cd70 TT |
24353 | #if GDB_SELF_TEST |
24354 | ||
24355 | namespace selftests { | |
24356 | namespace find_containing_comp_unit { | |
24357 | ||
24358 | static void | |
24359 | run_test () | |
24360 | { | |
473ab964 | 24361 | dwarf2_per_cu_data_up one (new dwarf2_per_cu_data); |
0d305d5c | 24362 | dwarf2_per_cu_data *one_ptr = one.get (); |
473ab964 | 24363 | dwarf2_per_cu_data_up two (new dwarf2_per_cu_data); |
0d305d5c | 24364 | dwarf2_per_cu_data *two_ptr = two.get (); |
473ab964 | 24365 | dwarf2_per_cu_data_up three (new dwarf2_per_cu_data); |
0d305d5c | 24366 | dwarf2_per_cu_data *three_ptr = three.get (); |
473ab964 | 24367 | dwarf2_per_cu_data_up four (new dwarf2_per_cu_data); |
0d305d5c TT |
24368 | dwarf2_per_cu_data *four_ptr = four.get (); |
24369 | ||
24370 | one->length = 5; | |
24371 | two->sect_off = sect_offset (one->length); | |
24372 | two->length = 7; | |
24373 | ||
24374 | three->length = 5; | |
24375 | three->is_dwz = 1; | |
24376 | four->sect_off = sect_offset (three->length); | |
24377 | four->length = 7; | |
24378 | four->is_dwz = 1; | |
24379 | ||
473ab964 | 24380 | std::vector<dwarf2_per_cu_data_up> units; |
0d305d5c TT |
24381 | units.push_back (std::move (one)); |
24382 | units.push_back (std::move (two)); | |
24383 | units.push_back (std::move (three)); | |
24384 | units.push_back (std::move (four)); | |
22b6cd70 TT |
24385 | |
24386 | int result; | |
24387 | ||
24388 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 0, units); | |
0d305d5c | 24389 | SELF_CHECK (units[result].get () == one_ptr); |
22b6cd70 | 24390 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 0, units); |
0d305d5c | 24391 | SELF_CHECK (units[result].get () == one_ptr); |
22b6cd70 | 24392 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 0, units); |
0d305d5c | 24393 | SELF_CHECK (units[result].get () == two_ptr); |
22b6cd70 TT |
24394 | |
24395 | result = dwarf2_find_containing_comp_unit (sect_offset (0), 1, units); | |
0d305d5c | 24396 | SELF_CHECK (units[result].get () == three_ptr); |
22b6cd70 | 24397 | result = dwarf2_find_containing_comp_unit (sect_offset (3), 1, units); |
0d305d5c | 24398 | SELF_CHECK (units[result].get () == three_ptr); |
22b6cd70 | 24399 | result = dwarf2_find_containing_comp_unit (sect_offset (5), 1, units); |
0d305d5c | 24400 | SELF_CHECK (units[result].get () == four_ptr); |
22b6cd70 TT |
24401 | } |
24402 | ||
24403 | } | |
24404 | } | |
24405 | ||
24406 | #endif /* GDB_SELF_TEST */ | |
24407 | ||
9816fde3 JK |
24408 | /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */ |
24409 | ||
24410 | static void | |
95554aad TT |
24411 | prepare_one_comp_unit (struct dwarf2_cu *cu, struct die_info *comp_unit_die, |
24412 | enum language pretend_language) | |
9816fde3 JK |
24413 | { |
24414 | struct attribute *attr; | |
24415 | ||
24416 | /* Set the language we're debugging. */ | |
24417 | attr = dwarf2_attr (comp_unit_die, DW_AT_language, cu); | |
435d3d88 | 24418 | if (attr != nullptr) |
529908cb | 24419 | set_cu_language (attr->constant_value (0), cu); |
9816fde3 | 24420 | else |
9cded63f | 24421 | { |
95554aad | 24422 | cu->language = pretend_language; |
9cded63f TT |
24423 | cu->language_defn = language_def (cu->language); |
24424 | } | |
dee91e82 | 24425 | |
7d45c7c3 | 24426 | cu->producer = dwarf2_string_attr (comp_unit_die, DW_AT_producer, cu); |
93311388 DE |
24427 | } |
24428 | ||
7188ed02 | 24429 | /* See read.h. */ |
ae038cb0 | 24430 | |
7188ed02 SM |
24431 | dwarf2_cu * |
24432 | dwarf2_per_objfile::get_cu (dwarf2_per_cu_data *per_cu) | |
ae038cb0 | 24433 | { |
7188ed02 SM |
24434 | auto it = m_dwarf2_cus.find (per_cu); |
24435 | if (it == m_dwarf2_cus.end ()) | |
24436 | return nullptr; | |
ae038cb0 | 24437 | |
7188ed02 SM |
24438 | return it->second; |
24439 | } | |
24440 | ||
24441 | /* See read.h. */ | |
24442 | ||
24443 | void | |
24444 | dwarf2_per_objfile::set_cu (dwarf2_per_cu_data *per_cu, dwarf2_cu *cu) | |
24445 | { | |
24446 | gdb_assert (this->get_cu (per_cu) == nullptr); | |
24447 | ||
24448 | m_dwarf2_cus[per_cu] = cu; | |
24449 | } | |
24450 | ||
24451 | /* See read.h. */ | |
24452 | ||
24453 | void | |
24454 | dwarf2_per_objfile::age_comp_units () | |
24455 | { | |
17e593e9 SM |
24456 | dwarf_read_debug_printf_v ("running"); |
24457 | ||
08ac5771 SM |
24458 | /* This is not expected to be called in the middle of CU expansion. There is |
24459 | an invariant that if a CU is in the CUs-to-expand queue, its DIEs are | |
24460 | loaded in memory. Calling age_comp_units while the queue is in use could | |
24461 | make us free the DIEs for a CU that is in the queue and therefore break | |
24462 | that invariant. */ | |
24463 | gdb_assert (!this->per_bfd->queue.has_value ()); | |
24464 | ||
7188ed02 SM |
24465 | /* Start by clearing all marks. */ |
24466 | for (auto pair : m_dwarf2_cus) | |
347212b8 | 24467 | pair.second->clear_mark (); |
7188ed02 SM |
24468 | |
24469 | /* Traverse all CUs, mark them and their dependencies if used recently | |
24470 | enough. */ | |
24471 | for (auto pair : m_dwarf2_cus) | |
ae038cb0 | 24472 | { |
7188ed02 SM |
24473 | dwarf2_cu *cu = pair.second; |
24474 | ||
24475 | cu->last_used++; | |
24476 | if (cu->last_used <= dwarf_max_cache_age) | |
347212b8 | 24477 | cu->mark (); |
ae038cb0 DJ |
24478 | } |
24479 | ||
7188ed02 SM |
24480 | /* Delete all CUs still not marked. */ |
24481 | for (auto it = m_dwarf2_cus.begin (); it != m_dwarf2_cus.end ();) | |
ae038cb0 | 24482 | { |
7188ed02 | 24483 | dwarf2_cu *cu = it->second; |
ae038cb0 | 24484 | |
347212b8 | 24485 | if (!cu->is_marked ()) |
ae038cb0 | 24486 | { |
17e593e9 SM |
24487 | dwarf_read_debug_printf_v ("deleting old CU %s", |
24488 | sect_offset_str (cu->per_cu->sect_off)); | |
7188ed02 SM |
24489 | delete cu; |
24490 | it = m_dwarf2_cus.erase (it); | |
ae038cb0 DJ |
24491 | } |
24492 | else | |
7188ed02 | 24493 | it++; |
ae038cb0 DJ |
24494 | } |
24495 | } | |
24496 | ||
7188ed02 | 24497 | /* See read.h. */ |
ae038cb0 | 24498 | |
7188ed02 SM |
24499 | void |
24500 | dwarf2_per_objfile::remove_cu (dwarf2_per_cu_data *per_cu) | |
ae038cb0 | 24501 | { |
7188ed02 SM |
24502 | auto it = m_dwarf2_cus.find (per_cu); |
24503 | if (it == m_dwarf2_cus.end ()) | |
24504 | return; | |
ae038cb0 | 24505 | |
7188ed02 | 24506 | delete it->second; |
ae038cb0 | 24507 | |
7188ed02 SM |
24508 | m_dwarf2_cus.erase (it); |
24509 | } | |
ae038cb0 | 24510 | |
7188ed02 SM |
24511 | dwarf2_per_objfile::~dwarf2_per_objfile () |
24512 | { | |
24513 | remove_all_cus (); | |
ae038cb0 DJ |
24514 | } |
24515 | ||
dee91e82 DE |
24516 | /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer. |
24517 | We store these in a hash table separate from the DIEs, and preserve them | |
24518 | when the DIEs are flushed out of cache. | |
24519 | ||
24520 | The CU "per_cu" pointer is needed because offset alone is not enough to | |
3019eac3 | 24521 | uniquely identify the type. A file may have multiple .debug_types sections, |
c88ee1f0 DE |
24522 | or the type may come from a DWO file. Furthermore, while it's more logical |
24523 | to use per_cu->section+offset, with Fission the section with the data is in | |
24524 | the DWO file but we don't know that section at the point we need it. | |
24525 | We have to use something in dwarf2_per_cu_data (or the pointer to it) | |
24526 | because we can enter the lookup routine, get_die_type_at_offset, from | |
24527 | outside this file, and thus won't necessarily have PER_CU->cu. | |
24528 | Fortunately, PER_CU is stable for the life of the objfile. */ | |
1c379e20 | 24529 | |
dee91e82 | 24530 | struct dwarf2_per_cu_offset_and_type |
1c379e20 | 24531 | { |
dee91e82 | 24532 | const struct dwarf2_per_cu_data *per_cu; |
9c541725 | 24533 | sect_offset sect_off; |
1c379e20 DJ |
24534 | struct type *type; |
24535 | }; | |
24536 | ||
dee91e82 | 24537 | /* Hash function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24538 | |
24539 | static hashval_t | |
dee91e82 | 24540 | per_cu_offset_and_type_hash (const void *item) |
1c379e20 | 24541 | { |
9a3c8263 SM |
24542 | const struct dwarf2_per_cu_offset_and_type *ofs |
24543 | = (const struct dwarf2_per_cu_offset_and_type *) item; | |
9a619af0 | 24544 | |
9c541725 | 24545 | return (uintptr_t) ofs->per_cu + to_underlying (ofs->sect_off); |
1c379e20 DJ |
24546 | } |
24547 | ||
dee91e82 | 24548 | /* Equality function for a dwarf2_per_cu_offset_and_type. */ |
1c379e20 DJ |
24549 | |
24550 | static int | |
dee91e82 | 24551 | per_cu_offset_and_type_eq (const void *item_lhs, const void *item_rhs) |
1c379e20 | 24552 | { |
9a3c8263 SM |
24553 | const struct dwarf2_per_cu_offset_and_type *ofs_lhs |
24554 | = (const struct dwarf2_per_cu_offset_and_type *) item_lhs; | |
24555 | const struct dwarf2_per_cu_offset_and_type *ofs_rhs | |
24556 | = (const struct dwarf2_per_cu_offset_and_type *) item_rhs; | |
9a619af0 | 24557 | |
dee91e82 | 24558 | return (ofs_lhs->per_cu == ofs_rhs->per_cu |
9c541725 | 24559 | && ofs_lhs->sect_off == ofs_rhs->sect_off); |
1c379e20 DJ |
24560 | } |
24561 | ||
24562 | /* Set the type associated with DIE to TYPE. Save it in CU's hash | |
7e314c57 JK |
24563 | table if necessary. For convenience, return TYPE. |
24564 | ||
24565 | The DIEs reading must have careful ordering to: | |
85102364 | 24566 | * Not cause infinite loops trying to read in DIEs as a prerequisite for |
7e314c57 JK |
24567 | reading current DIE. |
24568 | * Not trying to dereference contents of still incompletely read in types | |
24569 | while reading in other DIEs. | |
24570 | * Enable referencing still incompletely read in types just by a pointer to | |
24571 | the type without accessing its fields. | |
24572 | ||
24573 | Therefore caller should follow these rules: | |
24574 | * Try to fetch any prerequisite types we may need to build this DIE type | |
24575 | before building the type and calling set_die_type. | |
e71ec853 | 24576 | * After building type call set_die_type for current DIE as soon as |
7e314c57 JK |
24577 | possible before fetching more types to complete the current type. |
24578 | * Make the type as complete as possible before fetching more types. */ | |
1c379e20 | 24579 | |
f792889a | 24580 | static struct type * |
57567375 TT |
24581 | set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu, |
24582 | bool skip_data_location) | |
1c379e20 | 24583 | { |
976ca316 | 24584 | dwarf2_per_objfile *per_objfile = cu->per_objfile; |
dee91e82 | 24585 | struct dwarf2_per_cu_offset_and_type **slot, ofs; |
976ca316 | 24586 | struct objfile *objfile = per_objfile->objfile; |
3cdcd0ce JB |
24587 | struct attribute *attr; |
24588 | struct dynamic_prop prop; | |
1c379e20 | 24589 | |
b4ba55a1 JB |
24590 | /* For Ada types, make sure that the gnat-specific data is always |
24591 | initialized (if not already set). There are a few types where | |
24592 | we should not be doing so, because the type-specific area is | |
24593 | already used to hold some other piece of info (eg: TYPE_CODE_FLT | |
24594 | where the type-specific area is used to store the floatformat). | |
24595 | But this is not a problem, because the gnat-specific information | |
24596 | is actually not needed for these types. */ | |
24597 | if (need_gnat_info (cu) | |
78134374 SM |
24598 | && type->code () != TYPE_CODE_FUNC |
24599 | && type->code () != TYPE_CODE_FLT | |
24600 | && type->code () != TYPE_CODE_METHODPTR | |
24601 | && type->code () != TYPE_CODE_MEMBERPTR | |
24602 | && type->code () != TYPE_CODE_METHOD | |
09584414 | 24603 | && type->code () != TYPE_CODE_FIXED_POINT |
b4ba55a1 JB |
24604 | && !HAVE_GNAT_AUX_INFO (type)) |
24605 | INIT_GNAT_SPECIFIC (type); | |
24606 | ||
3f2f83dd KB |
24607 | /* Read DW_AT_allocated and set in type. */ |
24608 | attr = dwarf2_attr (die, DW_AT_allocated, cu); | |
9cdf9820 | 24609 | if (attr != NULL) |
3f2f83dd | 24610 | { |
293e7e51 | 24611 | struct type *prop_type = cu->addr_sized_int_type (false); |
9a49df9d | 24612 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
dda83cd7 | 24613 | type->add_dyn_prop (DYN_PROP_ALLOCATED, prop); |
3f2f83dd | 24614 | } |
3f2f83dd KB |
24615 | |
24616 | /* Read DW_AT_associated and set in type. */ | |
24617 | attr = dwarf2_attr (die, DW_AT_associated, cu); | |
9cdf9820 | 24618 | if (attr != NULL) |
3f2f83dd | 24619 | { |
293e7e51 | 24620 | struct type *prop_type = cu->addr_sized_int_type (false); |
9a49df9d | 24621 | if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type)) |
dda83cd7 | 24622 | type->add_dyn_prop (DYN_PROP_ASSOCIATED, prop); |
3f2f83dd | 24623 | } |
3f2f83dd | 24624 | |
3cdcd0ce | 24625 | /* Read DW_AT_data_location and set in type. */ |
57567375 TT |
24626 | if (!skip_data_location) |
24627 | { | |
24628 | attr = dwarf2_attr (die, DW_AT_data_location, cu); | |
24629 | if (attr_to_dynamic_prop (attr, die, cu, &prop, cu->addr_type ())) | |
24630 | type->add_dyn_prop (DYN_PROP_DATA_LOCATION, prop); | |
24631 | } | |
3cdcd0ce | 24632 | |
976ca316 SM |
24633 | if (per_objfile->die_type_hash == NULL) |
24634 | per_objfile->die_type_hash | |
0335378b TT |
24635 | = htab_up (htab_create_alloc (127, |
24636 | per_cu_offset_and_type_hash, | |
24637 | per_cu_offset_and_type_eq, | |
24638 | NULL, xcalloc, xfree)); | |
1c379e20 | 24639 | |
dee91e82 | 24640 | ofs.per_cu = cu->per_cu; |
9c541725 | 24641 | ofs.sect_off = die->sect_off; |
1c379e20 | 24642 | ofs.type = type; |
dee91e82 | 24643 | slot = (struct dwarf2_per_cu_offset_and_type **) |
976ca316 | 24644 | htab_find_slot (per_objfile->die_type_hash.get (), &ofs, INSERT); |
7e314c57 | 24645 | if (*slot) |
b98664d3 | 24646 | complaint (_("A problem internal to GDB: DIE %s has type already set"), |
9d8780f0 | 24647 | sect_offset_str (die->sect_off)); |
8d749320 SM |
24648 | *slot = XOBNEW (&objfile->objfile_obstack, |
24649 | struct dwarf2_per_cu_offset_and_type); | |
1c379e20 | 24650 | **slot = ofs; |
f792889a | 24651 | return type; |
1c379e20 DJ |
24652 | } |
24653 | ||
9c541725 | 24654 | /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash, |
02142a6c | 24655 | or return NULL if the die does not have a saved type. */ |
1c379e20 DJ |
24656 | |
24657 | static struct type * | |
9c541725 | 24658 | get_die_type_at_offset (sect_offset sect_off, |
aa66c379 | 24659 | dwarf2_per_cu_data *per_cu, |
976ca316 | 24660 | dwarf2_per_objfile *per_objfile) |
1c379e20 | 24661 | { |
dee91e82 | 24662 | struct dwarf2_per_cu_offset_and_type *slot, ofs; |
f792889a | 24663 | |
976ca316 | 24664 | if (per_objfile->die_type_hash == NULL) |
f792889a | 24665 | return NULL; |
1c379e20 | 24666 | |
dee91e82 | 24667 | ofs.per_cu = per_cu; |
9c541725 | 24668 | ofs.sect_off = sect_off; |
9a3c8263 | 24669 | slot = ((struct dwarf2_per_cu_offset_and_type *) |
976ca316 | 24670 | htab_find (per_objfile->die_type_hash.get (), &ofs)); |
1c379e20 DJ |
24671 | if (slot) |
24672 | return slot->type; | |
24673 | else | |
24674 | return NULL; | |
24675 | } | |
24676 | ||
02142a6c | 24677 | /* Look up the type for DIE in CU in die_type_hash, |
673bfd45 DE |
24678 | or return NULL if DIE does not have a saved type. */ |
24679 | ||
24680 | static struct type * | |
24681 | get_die_type (struct die_info *die, struct dwarf2_cu *cu) | |
24682 | { | |
aa66c379 | 24683 | return get_die_type_at_offset (die->sect_off, cu->per_cu, cu->per_objfile); |
673bfd45 DE |
24684 | } |
24685 | ||
72bf9492 DJ |
24686 | /* Trivial hash function for partial_die_info: the hash value of a DIE |
24687 | is its offset in .debug_info for this objfile. */ | |
24688 | ||
24689 | static hashval_t | |
24690 | partial_die_hash (const void *item) | |
24691 | { | |
9a3c8263 SM |
24692 | const struct partial_die_info *part_die |
24693 | = (const struct partial_die_info *) item; | |
9a619af0 | 24694 | |
9c541725 | 24695 | return to_underlying (part_die->sect_off); |
72bf9492 DJ |
24696 | } |
24697 | ||
24698 | /* Trivial comparison function for partial_die_info structures: two DIEs | |
24699 | are equal if they have the same offset. */ | |
24700 | ||
24701 | static int | |
24702 | partial_die_eq (const void *item_lhs, const void *item_rhs) | |
24703 | { | |
9a3c8263 SM |
24704 | const struct partial_die_info *part_die_lhs |
24705 | = (const struct partial_die_info *) item_lhs; | |
24706 | const struct partial_die_info *part_die_rhs | |
24707 | = (const struct partial_die_info *) item_rhs; | |
9a619af0 | 24708 | |
9c541725 | 24709 | return part_die_lhs->sect_off == part_die_rhs->sect_off; |
72bf9492 DJ |
24710 | } |
24711 | ||
3c3bb058 AB |
24712 | struct cmd_list_element *set_dwarf_cmdlist; |
24713 | struct cmd_list_element *show_dwarf_cmdlist; | |
ae038cb0 | 24714 | |
9291a0cd | 24715 | static void |
cd4fb1b2 SM |
24716 | show_check_physname (struct ui_file *file, int from_tty, |
24717 | struct cmd_list_element *c, const char *value) | |
9291a0cd | 24718 | { |
cd4fb1b2 SM |
24719 | fprintf_filtered (file, |
24720 | _("Whether to check \"physname\" is %s.\n"), | |
24721 | value); | |
9291a0cd TT |
24722 | } |
24723 | ||
6c265988 | 24724 | void _initialize_dwarf2_read (); |
cd4fb1b2 | 24725 | void |
6c265988 | 24726 | _initialize_dwarf2_read () |
9291a0cd | 24727 | { |
0743fc83 | 24728 | add_basic_prefix_cmd ("dwarf", class_maintenance, _("\ |
cd4fb1b2 | 24729 | Set DWARF specific variables.\n\ |
590042fc | 24730 | Configure DWARF variables such as the cache size."), |
2f822da5 | 24731 | &set_dwarf_cmdlist, |
0743fc83 | 24732 | 0/*allow-unknown*/, &maintenance_set_cmdlist); |
156942c7 | 24733 | |
0743fc83 | 24734 | add_show_prefix_cmd ("dwarf", class_maintenance, _("\ |
590042fc PW |
24735 | Show DWARF specific variables.\n\ |
24736 | Show DWARF variables such as the cache size."), | |
2f822da5 | 24737 | &show_dwarf_cmdlist, |
0743fc83 | 24738 | 0/*allow-unknown*/, &maintenance_show_cmdlist); |
156942c7 | 24739 | |
cd4fb1b2 SM |
24740 | add_setshow_zinteger_cmd ("max-cache-age", class_obscure, |
24741 | &dwarf_max_cache_age, _("\ | |
24742 | Set the upper bound on the age of cached DWARF compilation units."), _("\ | |
24743 | Show the upper bound on the age of cached DWARF compilation units."), _("\ | |
24744 | A higher limit means that cached compilation units will be stored\n\ | |
24745 | in memory longer, and more total memory will be used. Zero disables\n\ | |
24746 | caching, which can slow down startup."), | |
24747 | NULL, | |
24748 | show_dwarf_max_cache_age, | |
24749 | &set_dwarf_cmdlist, | |
24750 | &show_dwarf_cmdlist); | |
156942c7 | 24751 | |
cd4fb1b2 SM |
24752 | add_setshow_zuinteger_cmd ("dwarf-read", no_class, &dwarf_read_debug, _("\ |
24753 | Set debugging of the DWARF reader."), _("\ | |
24754 | Show debugging of the DWARF reader."), _("\ | |
24755 | When enabled (non-zero), debugging messages are printed during DWARF\n\ | |
24756 | reading and symtab expansion. A value of 1 (one) provides basic\n\ | |
24757 | information. A value greater than 1 provides more verbose information."), | |
24758 | NULL, | |
24759 | NULL, | |
24760 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24761 | |
cd4fb1b2 SM |
24762 | add_setshow_zuinteger_cmd ("dwarf-die", no_class, &dwarf_die_debug, _("\ |
24763 | Set debugging of the DWARF DIE reader."), _("\ | |
24764 | Show debugging of the DWARF DIE reader."), _("\ | |
24765 | When enabled (non-zero), DIEs are dumped after they are read in.\n\ | |
24766 | The value is the maximum depth to print."), | |
24767 | NULL, | |
24768 | NULL, | |
24769 | &setdebuglist, &showdebuglist); | |
9291a0cd | 24770 | |
cd4fb1b2 SM |
24771 | add_setshow_zuinteger_cmd ("dwarf-line", no_class, &dwarf_line_debug, _("\ |
24772 | Set debugging of the dwarf line reader."), _("\ | |
24773 | Show debugging of the dwarf line reader."), _("\ | |
24774 | When enabled (non-zero), line number entries are dumped as they are read in.\n\ | |
24775 | A value of 1 (one) provides basic information.\n\ | |
24776 | A value greater than 1 provides more verbose information."), | |
24777 | NULL, | |
24778 | NULL, | |
24779 | &setdebuglist, &showdebuglist); | |
437afbb8 | 24780 | |
cd4fb1b2 SM |
24781 | add_setshow_boolean_cmd ("check-physname", no_class, &check_physname, _("\ |
24782 | Set cross-checking of \"physname\" code against demangler."), _("\ | |
24783 | Show cross-checking of \"physname\" code against demangler."), _("\ | |
24784 | When enabled, GDB's internal \"physname\" code is checked against\n\ | |
24785 | the demangler."), | |
24786 | NULL, show_check_physname, | |
24787 | &setdebuglist, &showdebuglist); | |
900e11f9 | 24788 | |
e615022a DE |
24789 | add_setshow_boolean_cmd ("use-deprecated-index-sections", |
24790 | no_class, &use_deprecated_index_sections, _("\ | |
24791 | Set whether to use deprecated gdb_index sections."), _("\ | |
24792 | Show whether to use deprecated gdb_index sections."), _("\ | |
24793 | When enabled, deprecated .gdb_index sections are used anyway.\n\ | |
24794 | Normally they are ignored either because of a missing feature or\n\ | |
24795 | performance issue.\n\ | |
24796 | Warning: This option must be enabled before gdb reads the file."), | |
24797 | NULL, | |
24798 | NULL, | |
24799 | &setlist, &showlist); | |
24800 | ||
f1e6e072 TT |
24801 | dwarf2_locexpr_index = register_symbol_computed_impl (LOC_COMPUTED, |
24802 | &dwarf2_locexpr_funcs); | |
24803 | dwarf2_loclist_index = register_symbol_computed_impl (LOC_COMPUTED, | |
24804 | &dwarf2_loclist_funcs); | |
24805 | ||
24806 | dwarf2_locexpr_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24807 | &dwarf2_block_frame_base_locexpr_funcs); | |
24808 | dwarf2_loclist_block_index = register_symbol_block_impl (LOC_BLOCK, | |
24809 | &dwarf2_block_frame_base_loclist_funcs); | |
c62446b1 PA |
24810 | |
24811 | #if GDB_SELF_TEST | |
24812 | selftests::register_test ("dw2_expand_symtabs_matching", | |
24813 | selftests::dw2_expand_symtabs_matching::run_test); | |
22b6cd70 TT |
24814 | selftests::register_test ("dwarf2_find_containing_comp_unit", |
24815 | selftests::find_containing_comp_unit::run_test); | |
c62446b1 | 24816 | #endif |
6502dd73 | 24817 | } |