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c906108c | 1 | /* Symbol table definitions for GDB. |
1bac305b | 2 | |
1d506c26 | 3 | Copyright (C) 1986-2024 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #if !defined (SYMTAB_H) | |
21 | #define SYMTAB_H 1 | |
22 | ||
a014b87a | 23 | #include <array> |
67d89901 | 24 | #include <vector> |
b5ec771e | 25 | #include <string> |
c2512106 | 26 | #include <set> |
268a13a5 | 27 | #include "gdbsupport/gdb_vecs.h" |
2f68a895 | 28 | #include "gdbtypes.h" |
bf31fd38 | 29 | #include "gdbsupport/gdb_obstack.h" |
d322d6d6 | 30 | #include "gdbsupport/gdb_regex.h" |
268a13a5 TT |
31 | #include "gdbsupport/enum-flags.h" |
32 | #include "gdbsupport/function-view.h" | |
6b09f134 | 33 | #include <optional> |
8082468f | 34 | #include <string_view> |
268a13a5 | 35 | #include "gdbsupport/next-iterator.h" |
9be25986 | 36 | #include "gdbsupport/iterator-range.h" |
eb3ff9a5 | 37 | #include "completer.h" |
f10ffa41 | 38 | #include "gdb-demangle.h" |
b2bc564f | 39 | #include "split-name.h" |
43e8c9ce | 40 | #include "frame.h" |
fe6356de | 41 | #include <optional> |
f8eba3c6 | 42 | |
5f8a3188 | 43 | /* Opaque declarations. */ |
da3331ec | 44 | struct ui_file; |
bd2b40ac | 45 | class frame_info_ptr; |
da3331ec | 46 | struct symbol; |
5f8a3188 | 47 | struct obstack; |
6a2f5abf | 48 | struct objfile; |
fe898f56 DC |
49 | struct block; |
50 | struct blockvector; | |
4c2df51b DJ |
51 | struct axs_value; |
52 | struct agent_expr; | |
6c95b8df | 53 | struct program_space; |
66a17cb6 | 54 | struct language_defn; |
4357ac6c | 55 | struct common_block; |
06096720 AB |
56 | struct obj_section; |
57 | struct cmd_list_element; | |
935676c9 | 58 | class probe; |
b5ec771e | 59 | struct lookup_name_info; |
74421c0b | 60 | struct code_breakpoint; |
b5ec771e PA |
61 | |
62 | /* How to match a lookup name against a symbol search name. */ | |
63 | enum class symbol_name_match_type | |
64 | { | |
65 | /* Wild matching. Matches unqualified symbol names in all | |
66 | namespace/module/packages, etc. */ | |
67 | WILD, | |
68 | ||
69 | /* Full matching. The lookup name indicates a fully-qualified name, | |
70 | and only matches symbol search names in the specified | |
71 | namespace/module/package. */ | |
72 | FULL, | |
73 | ||
de63c46b PA |
74 | /* Search name matching. This is like FULL, but the search name did |
75 | not come from the user; instead it is already a search name | |
987012b8 | 76 | retrieved from a search_name () call. |
de63c46b PA |
77 | For Ada, this avoids re-encoding an already-encoded search name |
78 | (which would potentially incorrectly lowercase letters in the | |
79 | linkage/search name that should remain uppercase). For C++, it | |
80 | avoids trying to demangle a name we already know is | |
81 | demangled. */ | |
82 | SEARCH_NAME, | |
83 | ||
b5ec771e PA |
84 | /* Expression matching. The same as FULL matching in most |
85 | languages. The same as WILD matching in Ada. */ | |
86 | EXPRESSION, | |
87 | }; | |
88 | ||
89 | /* Hash the given symbol search name according to LANGUAGE's | |
90 | rules. */ | |
91 | extern unsigned int search_name_hash (enum language language, | |
92 | const char *search_name); | |
93 | ||
94 | /* Ada-specific bits of a lookup_name_info object. This is lazily | |
95 | constructed on demand. */ | |
96 | ||
97 | class ada_lookup_name_info final | |
98 | { | |
99 | public: | |
100 | /* Construct. */ | |
101 | explicit ada_lookup_name_info (const lookup_name_info &lookup_name); | |
102 | ||
103 | /* Compare SYMBOL_SEARCH_NAME with our lookup name, using MATCH_TYPE | |
104 | as name match type. Returns true if there's a match, false | |
105 | otherwise. If non-NULL, store the matching results in MATCH. */ | |
106 | bool matches (const char *symbol_search_name, | |
107 | symbol_name_match_type match_type, | |
a207cff2 | 108 | completion_match_result *comp_match_res) const; |
b5ec771e PA |
109 | |
110 | /* The Ada-encoded lookup name. */ | |
111 | const std::string &lookup_name () const | |
112 | { return m_encoded_name; } | |
113 | ||
114 | /* Return true if we're supposed to be doing a wild match look | |
115 | up. */ | |
116 | bool wild_match_p () const | |
117 | { return m_wild_match_p; } | |
118 | ||
119 | /* Return true if we're looking up a name inside package | |
120 | Standard. */ | |
121 | bool standard_p () const | |
122 | { return m_standard_p; } | |
123 | ||
c63d3e8d PA |
124 | /* Return true if doing a verbatim match. */ |
125 | bool verbatim_p () const | |
126 | { return m_verbatim_p; } | |
127 | ||
b2bc564f TT |
128 | /* A wrapper for ::split_name that handles some Ada-specific |
129 | peculiarities. */ | |
8082468f | 130 | std::vector<std::string_view> split_name () const |
b2bc564f | 131 | { |
957ce537 | 132 | if (m_verbatim_p) |
b2bc564f | 133 | { |
957ce537 TT |
134 | /* For verbatim matches, just return the encoded name |
135 | as-is. */ | |
8082468f | 136 | std::vector<std::string_view> result; |
b2bc564f TT |
137 | result.emplace_back (m_encoded_name); |
138 | return result; | |
139 | } | |
957ce537 TT |
140 | /* Otherwise, split the decoded name for matching. */ |
141 | return ::split_name (m_decoded_name.c_str (), split_style::DOT_STYLE); | |
b2bc564f TT |
142 | } |
143 | ||
c63d3e8d | 144 | private: |
b5ec771e PA |
145 | /* The Ada-encoded lookup name. */ |
146 | std::string m_encoded_name; | |
147 | ||
957ce537 TT |
148 | /* The decoded lookup name. This is formed by calling ada_decode |
149 | with both 'operators' and 'wide' set to false. */ | |
150 | std::string m_decoded_name; | |
151 | ||
b5ec771e PA |
152 | /* Whether the user-provided lookup name was Ada encoded. If so, |
153 | then return encoded names in the 'matches' method's 'completion | |
154 | match result' output. */ | |
155 | bool m_encoded_p : 1; | |
156 | ||
157 | /* True if really doing wild matching. Even if the user requests | |
158 | wild matching, some cases require full matching. */ | |
159 | bool m_wild_match_p : 1; | |
160 | ||
161 | /* True if doing a verbatim match. This is true if the decoded | |
162 | version of the symbol name is wrapped in '<'/'>'. This is an | |
163 | escape hatch users can use to look up symbols the Ada encoding | |
164 | does not understand. */ | |
165 | bool m_verbatim_p : 1; | |
166 | ||
167 | /* True if the user specified a symbol name that is inside package | |
168 | Standard. Symbol names inside package Standard are handled | |
169 | specially. We always do a non-wild match of the symbol name | |
170 | without the "standard__" prefix, and only search static and | |
171 | global symbols. This was primarily introduced in order to allow | |
172 | the user to specifically access the standard exceptions using, | |
173 | for instance, Standard.Constraint_Error when Constraint_Error is | |
174 | ambiguous (due to the user defining its own Constraint_Error | |
175 | entity inside its program). */ | |
176 | bool m_standard_p : 1; | |
177 | }; | |
178 | ||
179 | /* Language-specific bits of a lookup_name_info object, for languages | |
180 | that do name searching using demangled names (C++/D/Go). This is | |
181 | lazily constructed on demand. */ | |
182 | ||
183 | struct demangle_for_lookup_info final | |
184 | { | |
185 | public: | |
186 | demangle_for_lookup_info (const lookup_name_info &lookup_name, | |
187 | language lang); | |
188 | ||
189 | /* The demangled lookup name. */ | |
190 | const std::string &lookup_name () const | |
191 | { return m_demangled_name; } | |
192 | ||
193 | private: | |
194 | /* The demangled lookup name. */ | |
195 | std::string m_demangled_name; | |
196 | }; | |
197 | ||
198 | /* Object that aggregates all information related to a symbol lookup | |
199 | name. I.e., the name that is matched against the symbol's search | |
200 | name. Caches per-language information so that it doesn't require | |
201 | recomputing it for every symbol comparison, like for example the | |
202 | Ada encoded name and the symbol's name hash for a given language. | |
203 | The object is conceptually immutable once constructed, and thus has | |
204 | no setters. This is to prevent some code path from tweaking some | |
205 | property of the lookup name for some local reason and accidentally | |
206 | altering the results of any continuing search(es). | |
207 | lookup_name_info objects are generally passed around as a const | |
208 | reference to reinforce that. (They're not passed around by value | |
209 | because they're not small.) */ | |
210 | class lookup_name_info final | |
211 | { | |
212 | public: | |
e0802d59 TT |
213 | /* We delete this overload so that the callers are required to |
214 | explicitly handle the lifetime of the name. */ | |
215 | lookup_name_info (std::string &&name, | |
216 | symbol_name_match_type match_type, | |
217 | bool completion_mode = false, | |
218 | bool ignore_parameters = false) = delete; | |
219 | ||
220 | /* This overload requires that NAME have a lifetime at least as long | |
221 | as the lifetime of this object. */ | |
222 | lookup_name_info (const std::string &name, | |
223 | symbol_name_match_type match_type, | |
224 | bool completion_mode = false, | |
225 | bool ignore_parameters = false) | |
226 | : m_match_type (match_type), | |
227 | m_completion_mode (completion_mode), | |
228 | m_ignore_parameters (ignore_parameters), | |
229 | m_name (name) | |
230 | {} | |
231 | ||
232 | /* This overload requires that NAME have a lifetime at least as long | |
233 | as the lifetime of this object. */ | |
234 | lookup_name_info (const char *name, | |
b5ec771e | 235 | symbol_name_match_type match_type, |
c62446b1 PA |
236 | bool completion_mode = false, |
237 | bool ignore_parameters = false) | |
b5ec771e PA |
238 | : m_match_type (match_type), |
239 | m_completion_mode (completion_mode), | |
c62446b1 | 240 | m_ignore_parameters (ignore_parameters), |
e0802d59 | 241 | m_name (name) |
b5ec771e PA |
242 | {} |
243 | ||
244 | /* Getters. See description of each corresponding field. */ | |
245 | symbol_name_match_type match_type () const { return m_match_type; } | |
246 | bool completion_mode () const { return m_completion_mode; } | |
8082468f | 247 | std::string_view name () const { return m_name; } |
c62446b1 PA |
248 | const bool ignore_parameters () const { return m_ignore_parameters; } |
249 | ||
e0802d59 TT |
250 | /* Like the "name" method but guarantees that the returned string is |
251 | \0-terminated. */ | |
252 | const char *c_str () const | |
253 | { | |
254 | /* Actually this is always guaranteed due to how the class is | |
255 | constructed. */ | |
256 | return m_name.data (); | |
257 | } | |
258 | ||
c62446b1 PA |
259 | /* Return a version of this lookup name that is usable with |
260 | comparisons against symbols have no parameter info, such as | |
261 | psymbols and GDB index symbols. */ | |
262 | lookup_name_info make_ignore_params () const | |
263 | { | |
e0802d59 | 264 | return lookup_name_info (c_str (), m_match_type, m_completion_mode, |
c62446b1 PA |
265 | true /* ignore params */); |
266 | } | |
b5ec771e PA |
267 | |
268 | /* Get the search name hash for searches in language LANG. */ | |
269 | unsigned int search_name_hash (language lang) const | |
270 | { | |
271 | /* Only compute each language's hash once. */ | |
272 | if (!m_demangled_hashes_p[lang]) | |
273 | { | |
274 | m_demangled_hashes[lang] | |
e0802d59 | 275 | = ::search_name_hash (lang, language_lookup_name (lang)); |
b5ec771e PA |
276 | m_demangled_hashes_p[lang] = true; |
277 | } | |
278 | return m_demangled_hashes[lang]; | |
279 | } | |
280 | ||
281 | /* Get the search name for searches in language LANG. */ | |
e0802d59 | 282 | const char *language_lookup_name (language lang) const |
b5ec771e PA |
283 | { |
284 | switch (lang) | |
285 | { | |
286 | case language_ada: | |
e0802d59 | 287 | return ada ().lookup_name ().c_str (); |
b5ec771e | 288 | case language_cplus: |
e0802d59 | 289 | return cplus ().lookup_name ().c_str (); |
b5ec771e | 290 | case language_d: |
e0802d59 | 291 | return d ().lookup_name ().c_str (); |
b5ec771e | 292 | case language_go: |
e0802d59 | 293 | return go ().lookup_name ().c_str (); |
b5ec771e | 294 | default: |
e0802d59 | 295 | return m_name.data (); |
b5ec771e PA |
296 | } |
297 | } | |
298 | ||
b2bc564f TT |
299 | /* A wrapper for ::split_name (see split-name.h) that splits this |
300 | name, and that handles any language-specific peculiarities. */ | |
8082468f | 301 | std::vector<std::string_view> split_name (language lang) const |
b2bc564f TT |
302 | { |
303 | if (lang == language_ada) | |
304 | return ada ().split_name (); | |
305 | split_style style = split_style::NONE; | |
306 | switch (lang) | |
307 | { | |
308 | case language_cplus: | |
309 | case language_rust: | |
310 | style = split_style::CXX; | |
311 | break; | |
312 | case language_d: | |
313 | case language_go: | |
fe26aa95 | 314 | style = split_style::DOT_STYLE; |
b2bc564f TT |
315 | break; |
316 | } | |
317 | return ::split_name (language_lookup_name (lang), style); | |
318 | } | |
319 | ||
b5ec771e PA |
320 | /* Get the Ada-specific lookup info. */ |
321 | const ada_lookup_name_info &ada () const | |
322 | { | |
323 | maybe_init (m_ada); | |
324 | return *m_ada; | |
325 | } | |
326 | ||
327 | /* Get the C++-specific lookup info. */ | |
328 | const demangle_for_lookup_info &cplus () const | |
329 | { | |
330 | maybe_init (m_cplus, language_cplus); | |
331 | return *m_cplus; | |
332 | } | |
333 | ||
334 | /* Get the D-specific lookup info. */ | |
335 | const demangle_for_lookup_info &d () const | |
336 | { | |
337 | maybe_init (m_d, language_d); | |
338 | return *m_d; | |
339 | } | |
340 | ||
341 | /* Get the Go-specific lookup info. */ | |
342 | const demangle_for_lookup_info &go () const | |
343 | { | |
344 | maybe_init (m_go, language_go); | |
345 | return *m_go; | |
346 | } | |
347 | ||
348 | /* Get a reference to a lookup_name_info object that matches any | |
349 | symbol name. */ | |
350 | static const lookup_name_info &match_any (); | |
351 | ||
352 | private: | |
353 | /* Initialize FIELD, if not initialized yet. */ | |
354 | template<typename Field, typename... Args> | |
355 | void maybe_init (Field &field, Args&&... args) const | |
356 | { | |
357 | if (!field) | |
358 | field.emplace (*this, std::forward<Args> (args)...); | |
359 | } | |
360 | ||
361 | /* The lookup info as passed to the ctor. */ | |
362 | symbol_name_match_type m_match_type; | |
363 | bool m_completion_mode; | |
c62446b1 | 364 | bool m_ignore_parameters; |
8082468f | 365 | std::string_view m_name; |
b5ec771e PA |
366 | |
367 | /* Language-specific info. These fields are filled lazily the first | |
368 | time a lookup is done in the corresponding language. They're | |
369 | mutable because lookup_name_info objects are typically passed | |
370 | around by const reference (see intro), and they're conceptually | |
371 | "cache" that can always be reconstructed from the non-mutable | |
372 | fields. */ | |
6b09f134 LS |
373 | mutable std::optional<ada_lookup_name_info> m_ada; |
374 | mutable std::optional<demangle_for_lookup_info> m_cplus; | |
375 | mutable std::optional<demangle_for_lookup_info> m_d; | |
376 | mutable std::optional<demangle_for_lookup_info> m_go; | |
b5ec771e PA |
377 | |
378 | /* The demangled hashes. Stored in an array with one entry for each | |
379 | possible language. The second array records whether we've | |
380 | already computed the each language's hash. (These are separate | |
381 | arrays instead of a single array of optional<unsigned> to avoid | |
382 | alignment padding). */ | |
383 | mutable std::array<unsigned int, nr_languages> m_demangled_hashes; | |
384 | mutable std::array<bool, nr_languages> m_demangled_hashes_p {}; | |
385 | }; | |
386 | ||
387 | /* Comparison function for completion symbol lookup. | |
388 | ||
389 | Returns true if the symbol name matches against LOOKUP_NAME. | |
390 | ||
391 | SYMBOL_SEARCH_NAME should be a symbol's "search" name. | |
392 | ||
a207cff2 PA |
393 | On success and if non-NULL, COMP_MATCH_RES->match is set to point |
394 | to the symbol name as should be presented to the user as a | |
395 | completion match list element. In most languages, this is the same | |
396 | as the symbol's search name, but in some, like Ada, the display | |
397 | name is dynamically computed within the comparison routine. | |
398 | ||
399 | Also, on success and if non-NULL, COMP_MATCH_RES->match_for_lcd | |
400 | points the part of SYMBOL_SEARCH_NAME that was considered to match | |
401 | LOOKUP_NAME. E.g., in C++, in linespec/wild mode, if the symbol is | |
402 | "foo::function()" and LOOKUP_NAME is "function(", MATCH_FOR_LCD | |
403 | points to "function()" inside SYMBOL_SEARCH_NAME. */ | |
b5ec771e PA |
404 | typedef bool (symbol_name_matcher_ftype) |
405 | (const char *symbol_search_name, | |
406 | const lookup_name_info &lookup_name, | |
a207cff2 | 407 | completion_match_result *comp_match_res); |
c906108c | 408 | |
a7f19c79 MC |
409 | /* Some of the structures in this file are space critical. |
410 | The space-critical structures are: | |
411 | ||
412 | struct general_symbol_info | |
413 | struct symbol | |
414 | struct partial_symbol | |
415 | ||
5bccb4d1 | 416 | These structures are laid out to encourage good packing. |
a7f19c79 MC |
417 | They use ENUM_BITFIELD and short int fields, and they order the |
418 | structure members so that fields less than a word are next | |
c378eb4e | 419 | to each other so they can be packed together. */ |
a7f19c79 MC |
420 | |
421 | /* Rearranged: used ENUM_BITFIELD and rearranged field order in | |
422 | all the space critical structures (plus struct minimal_symbol). | |
423 | Memory usage dropped from 99360768 bytes to 90001408 bytes. | |
424 | I measured this with before-and-after tests of | |
425 | "HEAD-old-gdb -readnow HEAD-old-gdb" and | |
426 | "HEAD-new-gdb -readnow HEAD-old-gdb" on native i686-pc-linux-gnu, | |
427 | red hat linux 8, with LD_LIBRARY_PATH=/usr/lib/debug, | |
428 | typing "maint space 1" at the first command prompt. | |
429 | ||
430 | Here is another measurement (from andrew c): | |
431 | # no /usr/lib/debug, just plain glibc, like a normal user | |
432 | gdb HEAD-old-gdb | |
433 | (gdb) break internal_error | |
434 | (gdb) run | |
435 | (gdb) maint internal-error | |
436 | (gdb) backtrace | |
437 | (gdb) maint space 1 | |
438 | ||
439 | gdb gdb_6_0_branch 2003-08-19 space used: 8896512 | |
440 | gdb HEAD 2003-08-19 space used: 8904704 | |
441 | gdb HEAD 2003-08-21 space used: 8396800 (+symtab.h) | |
442 | gdb HEAD 2003-08-21 space used: 8265728 (+gdbtypes.h) | |
443 | ||
444 | The third line shows the savings from the optimizations in symtab.h. | |
445 | The fourth line shows the savings from the optimizations in | |
446 | gdbtypes.h. Both optimizations are in gdb HEAD now. | |
447 | ||
448 | --chastain 2003-08-21 */ | |
449 | ||
c906108c SS |
450 | /* Define a structure for the information that is common to all symbol types, |
451 | including minimal symbols, partial symbols, and full symbols. In a | |
452 | multilanguage environment, some language specific information may need to | |
c378eb4e | 453 | be recorded along with each symbol. */ |
c906108c | 454 | |
c378eb4e | 455 | /* This structure is space critical. See space comments at the top. */ |
c906108c SS |
456 | |
457 | struct general_symbol_info | |
17c5ed2c | 458 | { |
c9d95fa3 CB |
459 | /* Short version as to when to use which name accessor: |
460 | Use natural_name () to refer to the name of the symbol in the original | |
461 | source code. Use linkage_name () if you want to know what the linker | |
462 | thinks the symbol's name is. Use print_name () for output. Use | |
463 | demangled_name () if you specifically need to know whether natural_name () | |
464 | and linkage_name () are different. */ | |
465 | ||
466 | const char *linkage_name () const | |
4d4eaa30 | 467 | { return m_name; } |
c9d95fa3 CB |
468 | |
469 | /* Return SYMBOL's "natural" name, i.e. the name that it was called in | |
470 | the original source code. In languages like C++ where symbols may | |
471 | be mangled for ease of manipulation by the linker, this is the | |
472 | demangled name. */ | |
473 | const char *natural_name () const; | |
474 | ||
475 | /* Returns a version of the name of a symbol that is | |
476 | suitable for output. In C++ this is the "demangled" form of the | |
477 | name if demangle is on and the "mangled" form of the name if | |
478 | demangle is off. In other languages this is just the symbol name. | |
479 | The result should never be NULL. Don't use this for internal | |
480 | purposes (e.g. storing in a hashtable): it's only suitable for output. */ | |
481 | const char *print_name () const | |
482 | { return demangle ? natural_name () : linkage_name (); } | |
483 | ||
484 | /* Return the demangled name for a symbol based on the language for | |
485 | that symbol. If no demangled name exists, return NULL. */ | |
486 | const char *demangled_name () const; | |
487 | ||
488 | /* Returns the name to be used when sorting and searching symbols. | |
489 | In C++, we search for the demangled form of a name, | |
490 | and so sort symbols accordingly. In Ada, however, we search by mangled | |
491 | name. If there is no distinct demangled name, then this | |
492 | returns the same value (same pointer) as linkage_name (). */ | |
493 | const char *search_name () const; | |
494 | ||
43678b0a CB |
495 | /* Set just the linkage name of a symbol; do not try to demangle |
496 | it. Used for constructs which do not have a mangled name, | |
4d4eaa30 | 497 | e.g. struct tags. Unlike compute_and_set_names, linkage_name must |
43678b0a CB |
498 | be terminated and either already on the objfile's obstack or |
499 | permanently allocated. */ | |
500 | void set_linkage_name (const char *linkage_name) | |
4d4eaa30 | 501 | { m_name = linkage_name; } |
43678b0a | 502 | |
ff985671 TT |
503 | /* Set the demangled name of this symbol to NAME. NAME must be |
504 | already correctly allocated. If the symbol's language is Ada, | |
505 | then the name is ignored and the obstack is set. */ | |
506 | void set_demangled_name (const char *name, struct obstack *obstack); | |
507 | ||
c1b5c1eb CB |
508 | enum language language () const |
509 | { return m_language; } | |
510 | ||
d3ecddab CB |
511 | /* Initializes the language dependent portion of a symbol |
512 | depending upon the language for the symbol. */ | |
513 | void set_language (enum language language, struct obstack *obstack); | |
514 | ||
4d4eaa30 CB |
515 | /* Set the linkage and natural names of a symbol, by demangling |
516 | the linkage name. If linkage_name may not be nullterminated, | |
517 | copy_name must be set to true. */ | |
8082468f | 518 | void compute_and_set_names (std::string_view linkage_name, bool copy_name, |
4d4eaa30 | 519 | struct objfile_per_bfd_storage *per_bfd, |
6b09f134 LS |
520 | std::optional<hashval_t> hash |
521 | = std::optional<hashval_t> ()); | |
4d4eaa30 | 522 | |
4aeddc50 SM |
523 | CORE_ADDR value_address () const |
524 | { | |
525 | return m_value.address; | |
526 | } | |
527 | ||
528 | void set_value_address (CORE_ADDR address) | |
529 | { | |
530 | m_value.address = address; | |
531 | } | |
532 | ||
1ee8702d TT |
533 | /* Return the unrelocated address of this symbol. */ |
534 | unrelocated_addr unrelocated_address () const | |
535 | { | |
536 | return m_value.unrel_addr; | |
537 | } | |
538 | ||
539 | /* Set the unrelocated address of this symbol. */ | |
540 | void set_unrelocated_address (unrelocated_addr addr) | |
541 | { | |
542 | m_value.unrel_addr = addr; | |
543 | } | |
544 | ||
22abf04a | 545 | /* Name of the symbol. This is a required field. Storage for the |
4a146b47 EZ |
546 | name is allocated on the objfile_obstack for the associated |
547 | objfile. For languages like C++ that make a distinction between | |
548 | the mangled name and demangled name, this is the mangled | |
549 | name. */ | |
c906108c | 550 | |
4d4eaa30 | 551 | const char *m_name; |
c906108c | 552 | |
17c5ed2c DC |
553 | /* Value of the symbol. Which member of this union to use, and what |
554 | it means, depends on what kind of symbol this is and its | |
555 | SYMBOL_CLASS. See comments there for more details. All of these | |
556 | are in host byte order (though what they point to might be in | |
557 | target byte order, e.g. LOC_CONST_BYTES). */ | |
c906108c | 558 | |
17c5ed2c DC |
559 | union |
560 | { | |
12df843f | 561 | LONGEST ivalue; |
c906108c | 562 | |
3977b71f | 563 | const struct block *block; |
c906108c | 564 | |
d47a1bc1 | 565 | const gdb_byte *bytes; |
c906108c | 566 | |
17c5ed2c | 567 | CORE_ADDR address; |
c906108c | 568 | |
1ee8702d TT |
569 | /* The address, if unrelocated. An unrelocated symbol does not |
570 | have the runtime section offset applied. */ | |
571 | unrelocated_addr unrel_addr; | |
572 | ||
5a352474 | 573 | /* A common block. Used with LOC_COMMON_BLOCK. */ |
4357ac6c | 574 | |
17a40b44 | 575 | const struct common_block *common_block; |
4357ac6c | 576 | |
c378eb4e | 577 | /* For opaque typedef struct chain. */ |
c906108c | 578 | |
17c5ed2c DC |
579 | struct symbol *chain; |
580 | } | |
4aeddc50 | 581 | m_value; |
c906108c | 582 | |
17c5ed2c | 583 | /* Since one and only one language can apply, wrap the language specific |
29df156d | 584 | information inside a union. */ |
c906108c | 585 | |
17c5ed2c DC |
586 | union |
587 | { | |
f85f34ed TT |
588 | /* A pointer to an obstack that can be used for storage associated |
589 | with this symbol. This is only used by Ada, and only when the | |
590 | 'ada_mangled' field is zero. */ | |
591 | struct obstack *obstack; | |
592 | ||
afa16725 | 593 | /* This is used by languages which wish to store a demangled name. |
9c37b5ae | 594 | currently used by Ada, C++, and Objective C. */ |
615b3f62 | 595 | const char *demangled_name; |
17c5ed2c DC |
596 | } |
597 | language_specific; | |
c5aa993b | 598 | |
17c5ed2c DC |
599 | /* Record the source code language that applies to this symbol. |
600 | This is used to select one of the fields from the language specific | |
c378eb4e | 601 | union above. */ |
c5aa993b | 602 | |
c1b5c1eb | 603 | ENUM_BITFIELD(language) m_language : LANGUAGE_BITS; |
c5aa993b | 604 | |
a04a15f5 | 605 | /* This is only used by Ada. If set, then the 'demangled_name' field |
f85f34ed TT |
606 | of language_specific is valid. Otherwise, the 'obstack' field is |
607 | valid. */ | |
608 | unsigned int ada_mangled : 1; | |
609 | ||
17c5ed2c DC |
610 | /* Which section is this symbol in? This is an index into |
611 | section_offsets for this objfile. Negative means that the symbol | |
e27d198c | 612 | does not get relocated relative to a section. */ |
c5aa993b | 613 | |
a52d653e AB |
614 | short m_section; |
615 | ||
616 | /* Set the index into the obj_section list (within the containing | |
617 | objfile) for the section that contains this symbol. See M_SECTION | |
618 | for more details. */ | |
619 | ||
620 | void set_section_index (short idx) | |
621 | { m_section = idx; } | |
622 | ||
623 | /* Return the index into the obj_section list (within the containing | |
624 | objfile) for the section that contains this symbol. See M_SECTION | |
625 | for more details. */ | |
626 | ||
627 | short section_index () const | |
628 | { return m_section; } | |
ebbc3a7d AB |
629 | |
630 | /* Return the obj_section from OBJFILE for this symbol. The symbol | |
631 | returned is based on the SECTION member variable, and can be nullptr | |
632 | if SECTION is negative. */ | |
633 | ||
634 | struct obj_section *obj_section (const struct objfile *objfile) const; | |
17c5ed2c | 635 | }; |
c906108c | 636 | |
714835d5 | 637 | extern CORE_ADDR symbol_overlayed_address (CORE_ADDR, struct obj_section *); |
c906108c | 638 | |
d55c9a68 TT |
639 | /* Try to determine the demangled name for a symbol, based on the |
640 | language of that symbol. If the language is set to language_auto, | |
641 | it will attempt to find any demangling algorithm that works and | |
642 | then set the language appropriately. The returned name is allocated | |
643 | by the demangler and should be xfree'd. */ | |
644 | ||
3456e70c TT |
645 | extern gdb::unique_xmalloc_ptr<char> symbol_find_demangled_name |
646 | (struct general_symbol_info *gsymbol, const char *mangled); | |
d55c9a68 | 647 | |
81e32b6a | 648 | /* Return true if NAME matches the "search" name of GSYMBOL, according |
b5ec771e | 649 | to the symbol's language. */ |
b5ec771e PA |
650 | extern bool symbol_matches_search_name |
651 | (const struct general_symbol_info *gsymbol, | |
652 | const lookup_name_info &name); | |
4725b721 | 653 | |
5ffa0793 PA |
654 | /* Compute the hash of the given symbol search name of a symbol of |
655 | language LANGUAGE. */ | |
656 | extern unsigned int search_name_hash (enum language language, | |
657 | const char *search_name); | |
658 | ||
87193939 MC |
659 | /* Classification types for a minimal symbol. These should be taken as |
660 | "advisory only", since if gdb can't easily figure out a | |
661 | classification it simply selects mst_unknown. It may also have to | |
662 | guess when it can't figure out which is a better match between two | |
663 | types (mst_data versus mst_bss) for example. Since the minimal | |
664 | symbol info is sometimes derived from the BFD library's view of a | |
c378eb4e | 665 | file, we need to live with what information bfd supplies. */ |
87193939 MC |
666 | |
667 | enum minimal_symbol_type | |
668 | { | |
669 | mst_unknown = 0, /* Unknown type, the default */ | |
670 | mst_text, /* Generally executable instructions */ | |
f50776aa PA |
671 | |
672 | /* A GNU ifunc symbol, in the .text section. GDB uses to know | |
673 | whether the user is setting a breakpoint on a GNU ifunc function, | |
674 | and thus GDB needs to actually set the breakpoint on the target | |
675 | function. It is also used to know whether the program stepped | |
676 | into an ifunc resolver -- the resolver may get a separate | |
677 | symbol/alias under a different name, but it'll have the same | |
678 | address as the ifunc symbol. */ | |
679 | mst_text_gnu_ifunc, /* Executable code returning address | |
680 | of executable code */ | |
681 | ||
682 | /* A GNU ifunc function descriptor symbol, in a data section | |
683 | (typically ".opd"). Seen on architectures that use function | |
684 | descriptors, like PPC64/ELFv1. In this case, this symbol's value | |
685 | is the address of the descriptor. There'll be a corresponding | |
686 | mst_text_gnu_ifunc synthetic symbol for the text/entry | |
687 | address. */ | |
688 | mst_data_gnu_ifunc, /* Executable code returning address | |
0875794a | 689 | of executable code */ |
f50776aa | 690 | |
0875794a | 691 | mst_slot_got_plt, /* GOT entries for .plt sections */ |
87193939 MC |
692 | mst_data, /* Generally initialized data */ |
693 | mst_bss, /* Generally uninitialized data */ | |
694 | mst_abs, /* Generally absolute (nonrelocatable) */ | |
695 | /* GDB uses mst_solib_trampoline for the start address of a shared | |
696 | library trampoline entry. Breakpoints for shared library functions | |
697 | are put there if the shared library is not yet loaded. | |
698 | After the shared library is loaded, lookup_minimal_symbol will | |
699 | prefer the minimal symbol from the shared library (usually | |
700 | a mst_text symbol) over the mst_solib_trampoline symbol, and the | |
701 | breakpoints will be moved to their true address in the shared | |
702 | library via breakpoint_re_set. */ | |
703 | mst_solib_trampoline, /* Shared library trampoline code */ | |
704 | /* For the mst_file* types, the names are only guaranteed to be unique | |
705 | within a given .o file. */ | |
706 | mst_file_text, /* Static version of mst_text */ | |
707 | mst_file_data, /* Static version of mst_data */ | |
51cdc993 DE |
708 | mst_file_bss, /* Static version of mst_bss */ |
709 | nr_minsym_types | |
87193939 MC |
710 | }; |
711 | ||
51cdc993 DE |
712 | /* The number of enum minimal_symbol_type values, with some padding for |
713 | reasonable growth. */ | |
714 | #define MINSYM_TYPE_BITS 4 | |
69f6730d | 715 | static_assert (nr_minsym_types <= (1 << MINSYM_TYPE_BITS)); |
51cdc993 | 716 | |
c906108c SS |
717 | /* Define a simple structure used to hold some very basic information about |
718 | all defined global symbols (text, data, bss, abs, etc). The only required | |
719 | information is the general_symbol_info. | |
720 | ||
721 | In many cases, even if a file was compiled with no special options for | |
722 | debugging at all, as long as was not stripped it will contain sufficient | |
723 | information to build a useful minimal symbol table using this structure. | |
724 | Even when a file contains enough debugging information to build a full | |
725 | symbol table, these minimal symbols are still useful for quickly mapping | |
726 | between names and addresses, and vice versa. They are also sometimes | |
c378eb4e | 727 | used to figure out what full symbol table entries need to be read in. */ |
c906108c | 728 | |
eefba3da | 729 | struct minimal_symbol : public general_symbol_info |
17c5ed2c | 730 | { |
4aeddc50 SM |
731 | LONGEST value_longest () const |
732 | { | |
733 | return m_value.ivalue; | |
734 | } | |
735 | ||
736 | /* The relocated address of the minimal symbol, using the section | |
737 | offsets from OBJFILE. */ | |
738 | CORE_ADDR value_address (objfile *objfile) const; | |
739 | ||
9675da25 TT |
740 | /* It does not make sense to call this for minimal symbols, as they |
741 | are stored unrelocated. */ | |
742 | CORE_ADDR value_address () const = delete; | |
743 | ||
4aeddc50 | 744 | /* The unrelocated address of the minimal symbol. */ |
93d50cd8 | 745 | unrelocated_addr unrelocated_address () const |
4aeddc50 | 746 | { |
9675da25 TT |
747 | return m_value.unrel_addr; |
748 | } | |
749 | ||
750 | /* The unrelocated address just after the end of the the minimal | |
751 | symbol. */ | |
93d50cd8 | 752 | unrelocated_addr unrelocated_end_address () const |
9675da25 | 753 | { |
93d50cd8 | 754 | return unrelocated_addr (CORE_ADDR (unrelocated_address ()) + size ()); |
4aeddc50 SM |
755 | } |
756 | ||
60f62e2b SM |
757 | /* Return this minimal symbol's type. */ |
758 | ||
759 | minimal_symbol_type type () const | |
760 | { | |
761 | return m_type; | |
762 | } | |
763 | ||
764 | /* Set this minimal symbol's type. */ | |
765 | ||
766 | void set_type (minimal_symbol_type type) | |
767 | { | |
768 | m_type = type; | |
769 | } | |
770 | ||
5bbfd12d SM |
771 | /* Return this minimal symbol's size. */ |
772 | ||
773 | unsigned long size () const | |
774 | { | |
775 | return m_size; | |
776 | } | |
777 | ||
778 | /* Set this minimal symbol's size. */ | |
779 | ||
780 | void set_size (unsigned long size) | |
781 | { | |
782 | m_size = size; | |
783 | m_has_size = 1; | |
784 | } | |
785 | ||
786 | /* Return true if this minimal symbol's size is known. */ | |
787 | ||
788 | bool has_size () const | |
789 | { | |
790 | return m_has_size; | |
791 | } | |
792 | ||
e165fcef SM |
793 | /* Return this minimal symbol's first target-specific flag. */ |
794 | ||
795 | bool target_flag_1 () const | |
796 | { | |
797 | return m_target_flag_1; | |
798 | } | |
799 | ||
800 | /* Set this minimal symbol's first target-specific flag. */ | |
801 | ||
802 | void set_target_flag_1 (bool target_flag_1) | |
803 | { | |
804 | m_target_flag_1 = target_flag_1; | |
805 | } | |
806 | ||
807 | /* Return this minimal symbol's second target-specific flag. */ | |
808 | ||
809 | bool target_flag_2 () const | |
810 | { | |
811 | return m_target_flag_2; | |
812 | } | |
813 | ||
814 | /* Set this minimal symbol's second target-specific flag. */ | |
815 | ||
816 | void set_target_flag_2 (bool target_flag_2) | |
817 | { | |
818 | m_target_flag_2 = target_flag_2; | |
819 | } | |
820 | ||
8763cede | 821 | /* Size of this symbol. dbx_end_psymtab in dbxread.c uses this |
f594e5e9 MC |
822 | information to calculate the end of the partial symtab based on the |
823 | address of the last symbol plus the size of the last symbol. */ | |
824 | ||
5bbfd12d | 825 | unsigned long m_size; |
f594e5e9 | 826 | |
17c5ed2c | 827 | /* Which source file is this symbol in? Only relevant for mst_file_*. */ |
04aba065 | 828 | const char *filename; |
c906108c | 829 | |
87193939 | 830 | /* Classification type for this minimal symbol. */ |
17c5ed2c | 831 | |
60f62e2b | 832 | ENUM_BITFIELD(minimal_symbol_type) m_type : MINSYM_TYPE_BITS; |
17c5ed2c | 833 | |
422d65e7 DE |
834 | /* Non-zero if this symbol was created by gdb. |
835 | Such symbols do not appear in the output of "info var|fun". */ | |
836 | unsigned int created_by_gdb : 1; | |
837 | ||
b887350f | 838 | /* Two flag bits provided for the use of the target. */ |
e165fcef SM |
839 | unsigned int m_target_flag_1 : 1; |
840 | unsigned int m_target_flag_2 : 1; | |
b887350f | 841 | |
d9eaeb59 JB |
842 | /* Nonzero iff the size of the minimal symbol has been set. |
843 | Symbol size information can sometimes not be determined, because | |
844 | the object file format may not carry that piece of information. */ | |
5bbfd12d | 845 | unsigned int m_has_size : 1; |
d9eaeb59 | 846 | |
5a79c107 TT |
847 | /* Non-zero if this symbol ever had its demangled name set (even if |
848 | it was set to NULL). */ | |
849 | unsigned int name_set : 1; | |
850 | ||
17c5ed2c DC |
851 | /* Minimal symbols with the same hash key are kept on a linked |
852 | list. This is the link. */ | |
853 | ||
854 | struct minimal_symbol *hash_next; | |
855 | ||
856 | /* Minimal symbols are stored in two different hash tables. This is | |
857 | the `next' pointer for the demangled hash table. */ | |
858 | ||
859 | struct minimal_symbol *demangled_hash_next; | |
1ed9f74e | 860 | |
eefba3da | 861 | /* True if this symbol is of some data type. */ |
1ed9f74e PW |
862 | |
863 | bool data_p () const; | |
864 | ||
865 | /* True if MSYMBOL is of some text type. */ | |
866 | ||
867 | bool text_p () const; | |
62669649 KB |
868 | |
869 | /* For data symbols only, given an objfile, if 'maybe_copied' | |
870 | evaluates to 'true' for that objfile, then the symbol might be | |
871 | subject to copy relocation. In this case, a minimal symbol | |
872 | matching the symbol's linkage name is first looked for in the | |
873 | main objfile. If found, then that address is used; otherwise the | |
874 | address in this symbol is used. */ | |
875 | ||
876 | bool maybe_copied (objfile *objfile) const; | |
23e6f781 SM |
877 | |
878 | private: | |
879 | /* Return the address of this minimal symbol, in the context of OBJF. The | |
880 | MAYBE_COPIED flag must be set. If the minimal symbol appears in the | |
881 | main program's minimal symbols, then that minsym's address is | |
882 | returned; otherwise, this minimal symbol's address is returned. */ | |
883 | CORE_ADDR get_maybe_copied_address (objfile *objf) const; | |
17c5ed2c | 884 | }; |
c906108c | 885 | |
c35384fb TT |
886 | #include "minsyms.h" |
887 | ||
c906108c | 888 | \f |
c5aa993b | 889 | |
c906108c SS |
890 | /* Represent one symbol name; a variable, constant, function or typedef. */ |
891 | ||
176620f1 | 892 | /* Different name domains for symbols. Looking up a symbol specifies a |
c378eb4e | 893 | domain and ignores symbol definitions in other name domains. */ |
c906108c | 894 | |
0d1703b8 | 895 | enum domain_enum |
17c5ed2c | 896 | { |
176620f1 | 897 | /* UNDEF_DOMAIN is used when a domain has not been discovered or |
17c5ed2c | 898 | none of the following apply. This usually indicates an error either |
c378eb4e | 899 | in the symbol information or in gdb's handling of symbols. */ |
c906108c | 900 | |
176620f1 | 901 | UNDEF_DOMAIN, |
c906108c | 902 | |
176620f1 | 903 | /* VAR_DOMAIN is the usual domain. In C, this contains variables, |
c378eb4e | 904 | function names, typedef names and enum type values. */ |
c906108c | 905 | |
176620f1 | 906 | VAR_DOMAIN, |
c906108c | 907 | |
176620f1 | 908 | /* STRUCT_DOMAIN is used in C to hold struct, union and enum type names. |
17c5ed2c | 909 | Thus, if `struct foo' is used in a C program, it produces a symbol named |
c378eb4e | 910 | `foo' in the STRUCT_DOMAIN. */ |
c906108c | 911 | |
176620f1 | 912 | STRUCT_DOMAIN, |
c906108c | 913 | |
530e8392 KB |
914 | /* MODULE_DOMAIN is used in Fortran to hold module type names. */ |
915 | ||
916 | MODULE_DOMAIN, | |
917 | ||
0f5238ed | 918 | /* LABEL_DOMAIN may be used for names of labels (for gotos). */ |
c906108c | 919 | |
4357ac6c TT |
920 | LABEL_DOMAIN, |
921 | ||
5a352474 JK |
922 | /* Fortran common blocks. Their naming must be separate from VAR_DOMAIN. |
923 | They also always use LOC_COMMON_BLOCK. */ | |
51cdc993 DE |
924 | COMMON_BLOCK_DOMAIN, |
925 | ||
926 | /* This must remain last. */ | |
927 | NR_DOMAINS | |
0d1703b8 | 928 | }; |
c906108c | 929 | |
c01feb36 DE |
930 | /* The number of bits in a symbol used to represent the domain. */ |
931 | ||
51cdc993 | 932 | #define SYMBOL_DOMAIN_BITS 3 |
69f6730d | 933 | static_assert (NR_DOMAINS <= (1 << SYMBOL_DOMAIN_BITS)); |
c01feb36 | 934 | |
20c681d1 DE |
935 | extern const char *domain_name (domain_enum); |
936 | ||
470c0b1c | 937 | /* Searching domains, used when searching for symbols. Element numbers are |
e8930875 | 938 | hardcoded in GDB, check all enum uses before changing it. */ |
c906108c | 939 | |
8903c50d TT |
940 | enum search_domain |
941 | { | |
bd2e94ce TT |
942 | /* Everything in VAR_DOMAIN minus FUNCTIONS_DOMAIN and |
943 | TYPES_DOMAIN. */ | |
e8930875 | 944 | VARIABLES_DOMAIN = 0, |
c906108c | 945 | |
c378eb4e | 946 | /* All functions -- for some reason not methods, though. */ |
e8930875 | 947 | FUNCTIONS_DOMAIN = 1, |
c906108c | 948 | |
17c5ed2c | 949 | /* All defined types */ |
e8930875 | 950 | TYPES_DOMAIN = 2, |
7b08b9eb | 951 | |
59c35742 AB |
952 | /* All modules. */ |
953 | MODULES_DOMAIN = 3, | |
954 | ||
7b08b9eb | 955 | /* Any type. */ |
59c35742 | 956 | ALL_DOMAIN = 4 |
8903c50d | 957 | }; |
c906108c | 958 | |
20c681d1 DE |
959 | extern const char *search_domain_name (enum search_domain); |
960 | ||
c906108c SS |
961 | /* An address-class says where to find the value of a symbol. */ |
962 | ||
963 | enum address_class | |
17c5ed2c | 964 | { |
c378eb4e | 965 | /* Not used; catches errors. */ |
c5aa993b | 966 | |
17c5ed2c | 967 | LOC_UNDEF, |
c906108c | 968 | |
c378eb4e | 969 | /* Value is constant int SYMBOL_VALUE, host byteorder. */ |
c906108c | 970 | |
17c5ed2c | 971 | LOC_CONST, |
c906108c | 972 | |
c378eb4e | 973 | /* Value is at fixed address SYMBOL_VALUE_ADDRESS. */ |
c906108c | 974 | |
17c5ed2c | 975 | LOC_STATIC, |
c906108c | 976 | |
768a979c UW |
977 | /* Value is in register. SYMBOL_VALUE is the register number |
978 | in the original debug format. SYMBOL_REGISTER_OPS holds a | |
979 | function that can be called to transform this into the | |
980 | actual register number this represents in a specific target | |
981 | architecture (gdbarch). | |
2a2d4dc3 AS |
982 | |
983 | For some symbol formats (stabs, for some compilers at least), | |
984 | the compiler generates two symbols, an argument and a register. | |
985 | In some cases we combine them to a single LOC_REGISTER in symbol | |
986 | reading, but currently not for all cases (e.g. it's passed on the | |
987 | stack and then loaded into a register). */ | |
c906108c | 988 | |
17c5ed2c | 989 | LOC_REGISTER, |
c906108c | 990 | |
17c5ed2c | 991 | /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */ |
c906108c | 992 | |
17c5ed2c | 993 | LOC_ARG, |
c906108c | 994 | |
17c5ed2c | 995 | /* Value address is at SYMBOL_VALUE offset in arglist. */ |
c906108c | 996 | |
17c5ed2c | 997 | LOC_REF_ARG, |
c906108c | 998 | |
2a2d4dc3 | 999 | /* Value is in specified register. Just like LOC_REGISTER except the |
17c5ed2c | 1000 | register holds the address of the argument instead of the argument |
c378eb4e | 1001 | itself. This is currently used for the passing of structs and unions |
17c5ed2c DC |
1002 | on sparc and hppa. It is also used for call by reference where the |
1003 | address is in a register, at least by mipsread.c. */ | |
c906108c | 1004 | |
17c5ed2c | 1005 | LOC_REGPARM_ADDR, |
c906108c | 1006 | |
17c5ed2c | 1007 | /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */ |
c906108c | 1008 | |
17c5ed2c | 1009 | LOC_LOCAL, |
c906108c | 1010 | |
176620f1 EZ |
1011 | /* Value not used; definition in SYMBOL_TYPE. Symbols in the domain |
1012 | STRUCT_DOMAIN all have this class. */ | |
c906108c | 1013 | |
17c5ed2c | 1014 | LOC_TYPEDEF, |
c906108c | 1015 | |
c378eb4e | 1016 | /* Value is address SYMBOL_VALUE_ADDRESS in the code. */ |
c906108c | 1017 | |
17c5ed2c | 1018 | LOC_LABEL, |
c906108c | 1019 | |
17c5ed2c DC |
1020 | /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'. |
1021 | In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address | |
c378eb4e | 1022 | of the block. Function names have this class. */ |
c906108c | 1023 | |
17c5ed2c | 1024 | LOC_BLOCK, |
c906108c | 1025 | |
17c5ed2c DC |
1026 | /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in |
1027 | target byte order. */ | |
c906108c | 1028 | |
17c5ed2c | 1029 | LOC_CONST_BYTES, |
c906108c | 1030 | |
17c5ed2c DC |
1031 | /* Value is at fixed address, but the address of the variable has |
1032 | to be determined from the minimal symbol table whenever the | |
1033 | variable is referenced. | |
1034 | This happens if debugging information for a global symbol is | |
1035 | emitted and the corresponding minimal symbol is defined | |
1036 | in another object file or runtime common storage. | |
1037 | The linker might even remove the minimal symbol if the global | |
1038 | symbol is never referenced, in which case the symbol remains | |
de40b933 JK |
1039 | unresolved. |
1040 | ||
1041 | GDB would normally find the symbol in the minimal symbol table if it will | |
1042 | not find it in the full symbol table. But a reference to an external | |
1043 | symbol in a local block shadowing other definition requires full symbol | |
1044 | without possibly having its address available for LOC_STATIC. Testcase | |
5382cfab PW |
1045 | is provided as `gdb.dwarf2/dw2-unresolved.exp'. |
1046 | ||
d8175bcb TT |
1047 | This is also used for thread local storage (TLS) variables. In |
1048 | this case, the address of the TLS variable must be determined | |
1049 | when the variable is referenced, from the msymbol's address, | |
1050 | which is the offset of the TLS variable in the thread local | |
1051 | storage of the shared library/object. */ | |
c906108c | 1052 | |
17c5ed2c | 1053 | LOC_UNRESOLVED, |
c906108c | 1054 | |
17c5ed2c DC |
1055 | /* The variable does not actually exist in the program. |
1056 | The value is ignored. */ | |
c906108c | 1057 | |
17c5ed2c | 1058 | LOC_OPTIMIZED_OUT, |
c906108c | 1059 | |
4c2df51b | 1060 | /* The variable's address is computed by a set of location |
768a979c | 1061 | functions (see "struct symbol_computed_ops" below). */ |
4c2df51b | 1062 | LOC_COMPUTED, |
5a352474 JK |
1063 | |
1064 | /* The variable uses general_symbol_info->value->common_block field. | |
1065 | It also always uses COMMON_BLOCK_DOMAIN. */ | |
1066 | LOC_COMMON_BLOCK, | |
f1e6e072 TT |
1067 | |
1068 | /* Not used, just notes the boundary of the enum. */ | |
1069 | LOC_FINAL_VALUE | |
4c2df51b DJ |
1070 | }; |
1071 | ||
51cdc993 DE |
1072 | /* The number of bits needed for values in enum address_class, with some |
1073 | padding for reasonable growth, and room for run-time registered address | |
1074 | classes. See symtab.c:MAX_SYMBOL_IMPLS. | |
1075 | This is a #define so that we can have a assertion elsewhere to | |
1076 | verify that we have reserved enough space for synthetic address | |
1077 | classes. */ | |
1078 | #define SYMBOL_ACLASS_BITS 5 | |
69f6730d | 1079 | static_assert (LOC_FINAL_VALUE <= (1 << SYMBOL_ACLASS_BITS)); |
51cdc993 | 1080 | |
768a979c | 1081 | /* The methods needed to implement LOC_COMPUTED. These methods can |
a67af2b9 AC |
1082 | use the symbol's .aux_value for additional per-symbol information. |
1083 | ||
1084 | At present this is only used to implement location expressions. */ | |
1085 | ||
768a979c | 1086 | struct symbol_computed_ops |
4c2df51b DJ |
1087 | { |
1088 | ||
1089 | /* Return the value of the variable SYMBOL, relative to the stack | |
1090 | frame FRAME. If the variable has been optimized out, return | |
1091 | zero. | |
1092 | ||
0b31a4bc TT |
1093 | Iff `read_needs_frame (SYMBOL)' is not SYMBOL_NEEDS_FRAME, then |
1094 | FRAME may be zero. */ | |
4c2df51b DJ |
1095 | |
1096 | struct value *(*read_variable) (struct symbol * symbol, | |
9efe17a3 | 1097 | frame_info_ptr frame); |
4c2df51b | 1098 | |
e18b2753 JK |
1099 | /* Read variable SYMBOL like read_variable at (callee) FRAME's function |
1100 | entry. SYMBOL should be a function parameter, otherwise | |
1101 | NO_ENTRY_VALUE_ERROR will be thrown. */ | |
1102 | struct value *(*read_variable_at_entry) (struct symbol *symbol, | |
bd2b40ac | 1103 | frame_info_ptr frame); |
e18b2753 | 1104 | |
0b31a4bc TT |
1105 | /* Find the "symbol_needs_kind" value for the given symbol. This |
1106 | value determines whether reading the symbol needs memory (e.g., a | |
1107 | global variable), just registers (a thread-local), or a frame (a | |
1108 | local variable). */ | |
1109 | enum symbol_needs_kind (*get_symbol_read_needs) (struct symbol * symbol); | |
4c2df51b DJ |
1110 | |
1111 | /* Write to STREAM a natural-language description of the location of | |
08922a10 SS |
1112 | SYMBOL, in the context of ADDR. */ |
1113 | void (*describe_location) (struct symbol * symbol, CORE_ADDR addr, | |
1114 | struct ui_file * stream); | |
4c2df51b | 1115 | |
f1e6e072 TT |
1116 | /* Non-zero if this symbol's address computation is dependent on PC. */ |
1117 | unsigned char location_has_loclist; | |
1118 | ||
4c2df51b DJ |
1119 | /* Tracepoint support. Append bytecodes to the tracepoint agent |
1120 | expression AX that push the address of the object SYMBOL. Set | |
1121 | VALUE appropriately. Note --- for objects in registers, this | |
1122 | needn't emit any code; as long as it sets VALUE properly, then | |
1123 | the caller will generate the right code in the process of | |
1124 | treating this as an lvalue or rvalue. */ | |
1125 | ||
40f4af28 SM |
1126 | void (*tracepoint_var_ref) (struct symbol *symbol, struct agent_expr *ax, |
1127 | struct axs_value *value); | |
bb2ec1b3 TT |
1128 | |
1129 | /* Generate C code to compute the location of SYMBOL. The C code is | |
1130 | emitted to STREAM. GDBARCH is the current architecture and PC is | |
1131 | the PC at which SYMBOL's location should be evaluated. | |
1132 | REGISTERS_USED is a vector indexed by register number; the | |
1133 | generator function should set an element in this vector if the | |
1134 | corresponding register is needed by the location computation. | |
1135 | The generated C code must assign the location to a local | |
1136 | variable; this variable's name is RESULT_NAME. */ | |
1137 | ||
d82b3862 | 1138 | void (*generate_c_location) (struct symbol *symbol, string_file *stream, |
bb2ec1b3 | 1139 | struct gdbarch *gdbarch, |
3637a558 | 1140 | std::vector<bool> ®isters_used, |
bb2ec1b3 TT |
1141 | CORE_ADDR pc, const char *result_name); |
1142 | ||
17c5ed2c | 1143 | }; |
c906108c | 1144 | |
f1e6e072 TT |
1145 | /* The methods needed to implement LOC_BLOCK for inferior functions. |
1146 | These methods can use the symbol's .aux_value for additional | |
1147 | per-symbol information. */ | |
1148 | ||
1149 | struct symbol_block_ops | |
1150 | { | |
1151 | /* Fill in *START and *LENGTH with DWARF block data of function | |
1152 | FRAMEFUNC valid for inferior context address PC. Set *LENGTH to | |
1153 | zero if such location is not valid for PC; *START is left | |
1154 | uninitialized in such case. */ | |
1155 | void (*find_frame_base_location) (struct symbol *framefunc, CORE_ADDR pc, | |
1156 | const gdb_byte **start, size_t *length); | |
63e43d3a PMR |
1157 | |
1158 | /* Return the frame base address. FRAME is the frame for which we want to | |
1159 | compute the base address while FRAMEFUNC is the symbol for the | |
1160 | corresponding function. Return 0 on failure (FRAMEFUNC may not hold the | |
1161 | information we need). | |
1162 | ||
1163 | This method is designed to work with static links (nested functions | |
1164 | handling). Static links are function properties whose evaluation returns | |
1165 | the frame base address for the enclosing frame. However, there are | |
1166 | multiple definitions for "frame base": the content of the frame base | |
1167 | register, the CFA as defined by DWARF unwinding information, ... | |
1168 | ||
1169 | So this specific method is supposed to compute the frame base address such | |
30baf67b | 1170 | as for nested functions, the static link computes the same address. For |
63e43d3a PMR |
1171 | instance, considering DWARF debugging information, the static link is |
1172 | computed with DW_AT_static_link and this method must be used to compute | |
1173 | the corresponding DW_AT_frame_base attribute. */ | |
1174 | CORE_ADDR (*get_frame_base) (struct symbol *framefunc, | |
bd2b40ac | 1175 | frame_info_ptr frame); |
36ed3d84 TT |
1176 | |
1177 | /* Return the block for this function. So far, this is used to | |
1178 | implement function aliases. So, if this is set, then it's not | |
1179 | necessary to set the other functions in this structure; and vice | |
1180 | versa. */ | |
1181 | const block *(*get_block_value) (const struct symbol *sym); | |
f1e6e072 TT |
1182 | }; |
1183 | ||
768a979c UW |
1184 | /* Functions used with LOC_REGISTER and LOC_REGPARM_ADDR. */ |
1185 | ||
1186 | struct symbol_register_ops | |
1187 | { | |
1188 | int (*register_number) (struct symbol *symbol, struct gdbarch *gdbarch); | |
1189 | }; | |
1190 | ||
f1e6e072 TT |
1191 | /* Objects of this type are used to find the address class and the |
1192 | various computed ops vectors of a symbol. */ | |
1193 | ||
1194 | struct symbol_impl | |
1195 | { | |
1196 | enum address_class aclass; | |
1197 | ||
1198 | /* Used with LOC_COMPUTED. */ | |
1199 | const struct symbol_computed_ops *ops_computed; | |
1200 | ||
1201 | /* Used with LOC_BLOCK. */ | |
1202 | const struct symbol_block_ops *ops_block; | |
1203 | ||
1204 | /* Used with LOC_REGISTER and LOC_REGPARM_ADDR. */ | |
1205 | const struct symbol_register_ops *ops_register; | |
1206 | }; | |
1207 | ||
cf724bc9 TT |
1208 | /* struct symbol has some subclasses. This enum is used to |
1209 | differentiate between them. */ | |
1210 | ||
1211 | enum symbol_subclass_kind | |
1212 | { | |
1213 | /* Plain struct symbol. */ | |
1214 | SYMBOL_NONE, | |
1215 | ||
1216 | /* struct template_symbol. */ | |
1217 | SYMBOL_TEMPLATE, | |
1218 | ||
1219 | /* struct rust_vtable_symbol. */ | |
1220 | SYMBOL_RUST_VTABLE | |
1221 | }; | |
1222 | ||
6bc3c5b4 | 1223 | extern gdb::array_view<const struct symbol_impl> symbol_impls; |
d1eebf9a | 1224 | |
911e1e79 TT |
1225 | bool symbol_matches_domain (enum language symbol_language, |
1226 | domain_enum symbol_domain, | |
1227 | domain_enum domain); | |
1228 | ||
c378eb4e | 1229 | /* This structure is space critical. See space comments at the top. */ |
a7f19c79 | 1230 | |
468c0cbb | 1231 | struct symbol : public general_symbol_info, public allocate_on_obstack |
17c5ed2c | 1232 | { |
468c0cbb CB |
1233 | symbol () |
1234 | /* Class-initialization of bitfields is only allowed in C++20. */ | |
6c9c307c | 1235 | : m_domain (UNDEF_DOMAIN), |
ba44b1a3 | 1236 | m_aclass_index (0), |
7b3ecc75 | 1237 | m_is_objfile_owned (1), |
d9743061 | 1238 | m_is_argument (0), |
32177d6e | 1239 | m_is_inlined (0), |
468c0cbb | 1240 | maybe_copied (0), |
2c71f639 | 1241 | subclass (SYMBOL_NONE), |
496feb16 | 1242 | m_artificial (false) |
468c0cbb CB |
1243 | { |
1244 | /* We can't use an initializer list for members of a base class, and | |
dda83cd7 | 1245 | general_symbol_info needs to stay a POD type. */ |
4d4eaa30 | 1246 | m_name = nullptr; |
4aeddc50 | 1247 | m_value.ivalue = 0; |
468c0cbb | 1248 | language_specific.obstack = nullptr; |
c1b5c1eb | 1249 | m_language = language_unknown; |
468c0cbb | 1250 | ada_mangled = 0; |
a52d653e | 1251 | m_section = -1; |
6edc43ec | 1252 | /* GCC 4.8.5 (on CentOS 7) does not correctly compile class- |
dda83cd7 | 1253 | initialization of unions, so we initialize it manually here. */ |
6edc43ec | 1254 | owner.symtab = nullptr; |
468c0cbb | 1255 | } |
c906108c | 1256 | |
8c14c3a3 | 1257 | symbol (const symbol &) = default; |
1b453aed | 1258 | symbol &operator= (const symbol &) = default; |
8c14c3a3 | 1259 | |
ba44b1a3 SM |
1260 | void set_aclass_index (unsigned int aclass_index) |
1261 | { | |
1262 | m_aclass_index = aclass_index; | |
1263 | } | |
1264 | ||
d1eebf9a SM |
1265 | const symbol_impl &impl () const |
1266 | { | |
f66b5363 | 1267 | return symbol_impls[this->m_aclass_index]; |
d1eebf9a SM |
1268 | } |
1269 | ||
66d7f48f SM |
1270 | address_class aclass () const |
1271 | { | |
1272 | return this->impl ().aclass; | |
1273 | } | |
1274 | ||
911e1e79 TT |
1275 | /* Call symbol_matches_domain on this symbol, using the symbol's |
1276 | domain. */ | |
1277 | bool matches (domain_enum d) const | |
1278 | { | |
1279 | return symbol_matches_domain (language (), domain (), d); | |
1280 | } | |
1281 | ||
6c9c307c SM |
1282 | domain_enum domain () const |
1283 | { | |
1284 | return m_domain; | |
1285 | } | |
1286 | ||
1287 | void set_domain (domain_enum domain) | |
1288 | { | |
1289 | m_domain = domain; | |
1290 | } | |
1291 | ||
7b3ecc75 SM |
1292 | bool is_objfile_owned () const |
1293 | { | |
1294 | return m_is_objfile_owned; | |
1295 | } | |
1296 | ||
1297 | void set_is_objfile_owned (bool is_objfile_owned) | |
1298 | { | |
1299 | m_is_objfile_owned = is_objfile_owned; | |
1300 | } | |
1301 | ||
d9743061 SM |
1302 | bool is_argument () const |
1303 | { | |
1304 | return m_is_argument; | |
1305 | } | |
1306 | ||
1307 | void set_is_argument (bool is_argument) | |
1308 | { | |
1309 | m_is_argument = is_argument; | |
1310 | } | |
1311 | ||
32177d6e SM |
1312 | bool is_inlined () const |
1313 | { | |
1314 | return m_is_inlined; | |
1315 | } | |
1316 | ||
1317 | void set_is_inlined (bool is_inlined) | |
1318 | { | |
1319 | m_is_inlined = is_inlined; | |
1320 | } | |
1321 | ||
f5abd8f2 SM |
1322 | bool is_cplus_template_function () const |
1323 | { | |
1324 | return this->subclass == SYMBOL_TEMPLATE; | |
1325 | } | |
1326 | ||
5f9c5a63 SM |
1327 | struct type *type () const |
1328 | { | |
1329 | return m_type; | |
1330 | } | |
1331 | ||
1332 | void set_type (struct type *type) | |
1333 | { | |
1334 | m_type = type; | |
1335 | } | |
1336 | ||
72a8f763 | 1337 | unsigned int line () const |
5d0027b9 SM |
1338 | { |
1339 | return m_line; | |
1340 | } | |
1341 | ||
72a8f763 | 1342 | void set_line (unsigned int line) |
5d0027b9 SM |
1343 | { |
1344 | m_line = line; | |
1345 | } | |
1346 | ||
4aeddc50 SM |
1347 | LONGEST value_longest () const |
1348 | { | |
1349 | return m_value.ivalue; | |
1350 | } | |
1351 | ||
1352 | void set_value_longest (LONGEST value) | |
1353 | { | |
1354 | m_value.ivalue = value; | |
1355 | } | |
1356 | ||
1357 | CORE_ADDR value_address () const | |
1358 | { | |
1359 | if (this->maybe_copied) | |
f9b96f67 | 1360 | return this->get_maybe_copied_address (); |
4aeddc50 SM |
1361 | else |
1362 | return m_value.address; | |
1363 | } | |
1364 | ||
1365 | void set_value_address (CORE_ADDR address) | |
1366 | { | |
1367 | m_value.address = address; | |
1368 | } | |
1369 | ||
1370 | const gdb_byte *value_bytes () const | |
1371 | { | |
1372 | return m_value.bytes; | |
1373 | } | |
1374 | ||
1375 | void set_value_bytes (const gdb_byte *bytes) | |
1376 | { | |
1377 | m_value.bytes = bytes; | |
1378 | } | |
1379 | ||
1380 | const common_block *value_common_block () const | |
1381 | { | |
1382 | return m_value.common_block; | |
1383 | } | |
1384 | ||
1385 | void set_value_common_block (const common_block *common_block) | |
1386 | { | |
1387 | m_value.common_block = common_block; | |
1388 | } | |
1389 | ||
bb051d7a | 1390 | const block *value_block () const; |
4aeddc50 SM |
1391 | |
1392 | void set_value_block (const block *block) | |
1393 | { | |
1394 | m_value.block = block; | |
1395 | } | |
1396 | ||
1397 | symbol *value_chain () const | |
1398 | { | |
1399 | return m_value.chain; | |
1400 | } | |
1401 | ||
1402 | void set_value_chain (symbol *sym) | |
1403 | { | |
1404 | m_value.chain = sym; | |
1405 | } | |
1406 | ||
496feb16 TT |
1407 | /* Return true if this symbol was marked as artificial. */ |
1408 | bool is_artificial () const | |
1409 | { | |
1410 | return m_artificial; | |
1411 | } | |
1412 | ||
1413 | /* Set the 'artificial' flag on this symbol. */ | |
1414 | void set_is_artificial (bool artificial) | |
1415 | { | |
1416 | m_artificial = artificial; | |
1417 | } | |
1418 | ||
e19b2d94 TT |
1419 | /* Return the OBJFILE of this symbol. It is an error to call this |
1420 | if is_objfile_owned is false, which only happens for | |
1421 | architecture-provided types. */ | |
1422 | ||
1423 | struct objfile *objfile () const; | |
1424 | ||
bcd6845e TT |
1425 | /* Return the ARCH of this symbol. */ |
1426 | ||
1427 | struct gdbarch *arch () const; | |
1428 | ||
4206d69e TT |
1429 | /* Return the symtab of this symbol. It is an error to call this if |
1430 | is_objfile_owned is false, which only happens for | |
1431 | architecture-provided types. */ | |
1432 | ||
1433 | struct symtab *symtab () const; | |
1434 | ||
1435 | /* Set the symtab of this symbol to SYMTAB. It is an error to call | |
1436 | this if is_objfile_owned is false, which only happens for | |
1437 | architecture-provided types. */ | |
1438 | ||
1439 | void set_symtab (struct symtab *symtab); | |
1440 | ||
17c5ed2c | 1441 | /* Data type of value */ |
c906108c | 1442 | |
5f9c5a63 | 1443 | struct type *m_type = nullptr; |
c906108c | 1444 | |
1994afbf | 1445 | /* The owner of this symbol. |
e2ada9cb | 1446 | Which one to use is defined by symbol.is_objfile_owned. */ |
1994afbf DE |
1447 | |
1448 | union | |
1449 | { | |
1450 | /* The symbol table containing this symbol. This is the file associated | |
1451 | with LINE. It can be NULL during symbols read-in but it is never NULL | |
1452 | during normal operation. */ | |
6edc43ec | 1453 | struct symtab *symtab; |
1994afbf DE |
1454 | |
1455 | /* For types defined by the architecture. */ | |
1456 | struct gdbarch *arch; | |
1457 | } owner; | |
cb1df416 | 1458 | |
176620f1 | 1459 | /* Domain code. */ |
c906108c | 1460 | |
0d1703b8 | 1461 | ENUM_BITFIELD(domain_enum) m_domain : SYMBOL_DOMAIN_BITS; |
c906108c | 1462 | |
f1e6e072 TT |
1463 | /* Address class. This holds an index into the 'symbol_impls' |
1464 | table. The actual enum address_class value is stored there, | |
1465 | alongside any per-class ops vectors. */ | |
c906108c | 1466 | |
ba44b1a3 | 1467 | unsigned int m_aclass_index : SYMBOL_ACLASS_BITS; |
c906108c | 1468 | |
1994afbf | 1469 | /* If non-zero then symbol is objfile-owned, use owner.symtab. |
468c0cbb | 1470 | Otherwise symbol is arch-owned, use owner.arch. */ |
1994afbf | 1471 | |
7b3ecc75 | 1472 | unsigned int m_is_objfile_owned : 1; |
1994afbf | 1473 | |
2a2d4dc3 AS |
1474 | /* Whether this is an argument. */ |
1475 | ||
d9743061 | 1476 | unsigned m_is_argument : 1; |
2a2d4dc3 | 1477 | |
edb3359d | 1478 | /* Whether this is an inlined function (class LOC_BLOCK only). */ |
32177d6e | 1479 | unsigned m_is_inlined : 1; |
edb3359d | 1480 | |
4b610737 TT |
1481 | /* For LOC_STATIC only, if this is set, then the symbol might be |
1482 | subject to copy relocation. In this case, a minimal symbol | |
1483 | matching the symbol's linkage name is first looked for in the | |
1484 | main objfile. If found, then that address is used; otherwise the | |
1485 | address in this symbol is used. */ | |
1486 | ||
1487 | unsigned maybe_copied : 1; | |
1488 | ||
cf724bc9 | 1489 | /* The concrete type of this symbol. */ |
71a3c369 | 1490 | |
cf724bc9 | 1491 | ENUM_BITFIELD (symbol_subclass_kind) subclass : 2; |
71a3c369 | 1492 | |
2c71f639 TV |
1493 | /* Whether this symbol is artificial. */ |
1494 | ||
496feb16 | 1495 | bool m_artificial : 1; |
2c71f639 | 1496 | |
edb3359d DJ |
1497 | /* Line number of this symbol's definition, except for inlined |
1498 | functions. For an inlined function (class LOC_BLOCK and | |
1499 | SYMBOL_INLINED set) this is the line number of the function's call | |
1500 | site. Inlined function symbols are not definitions, and they are | |
1501 | never found by symbol table lookup. | |
72a8f763 | 1502 | If this symbol is arch-owned, LINE shall be zero. */ |
edb3359d | 1503 | |
72a8f763 | 1504 | unsigned int m_line = 0; |
c906108c | 1505 | |
10f4ecb8 UW |
1506 | /* An arbitrary data pointer, allowing symbol readers to record |
1507 | additional information on a per-symbol basis. Note that this data | |
1508 | must be allocated using the same obstack as the symbol itself. */ | |
1cd36e54 DE |
1509 | /* So far it is only used by: |
1510 | LOC_COMPUTED: to find the location information | |
1511 | LOC_BLOCK (DWARF2 function): information used internally by the | |
1512 | DWARF 2 code --- specifically, the location expression for the frame | |
10f4ecb8 UW |
1513 | base for this function. */ |
1514 | /* FIXME drow/2003-02-21: For the LOC_BLOCK case, it might be better | |
1515 | to add a magic symbol to the block containing this information, | |
1516 | or to have a generic debug info annotation slot for symbols. */ | |
1517 | ||
468c0cbb | 1518 | void *aux_value = nullptr; |
c906108c | 1519 | |
468c0cbb | 1520 | struct symbol *hash_next = nullptr; |
f9b96f67 SM |
1521 | |
1522 | private: | |
1523 | /* Return the address of this symbol. The MAYBE_COPIED flag must be set. | |
1524 | If the symbol appears in the main program's minimal symbols, then | |
1525 | that minsym's address is returned; otherwise, this symbol's address is | |
1526 | returned. */ | |
1527 | CORE_ADDR get_maybe_copied_address () const; | |
17c5ed2c | 1528 | }; |
c906108c | 1529 | |
d12307c1 PMR |
1530 | /* Several lookup functions return both a symbol and the block in which the |
1531 | symbol is found. This structure is used in these cases. */ | |
1532 | ||
1533 | struct block_symbol | |
1534 | { | |
1535 | /* The symbol that was found, or NULL if no symbol was found. */ | |
1536 | struct symbol *symbol; | |
1537 | ||
1538 | /* If SYMBOL is not NULL, then this is the block in which the symbol is | |
1539 | defined. */ | |
1540 | const struct block *block; | |
1541 | }; | |
1542 | ||
1994afbf DE |
1543 | /* Note: There is no accessor macro for symbol.owner because it is |
1544 | "private". */ | |
1545 | ||
d1eebf9a SM |
1546 | #define SYMBOL_COMPUTED_OPS(symbol) ((symbol)->impl ().ops_computed) |
1547 | #define SYMBOL_BLOCK_OPS(symbol) ((symbol)->impl ().ops_block) | |
1548 | #define SYMBOL_REGISTER_OPS(symbol) ((symbol)->impl ().ops_register) | |
10f4ecb8 | 1549 | #define SYMBOL_LOCATION_BATON(symbol) (symbol)->aux_value |
34eaf542 | 1550 | |
bb051d7a TT |
1551 | inline const block * |
1552 | symbol::value_block () const | |
1553 | { | |
36ed3d84 TT |
1554 | if (SYMBOL_BLOCK_OPS (this) != nullptr |
1555 | && SYMBOL_BLOCK_OPS (this)->get_block_value != nullptr) | |
1556 | return SYMBOL_BLOCK_OPS (this)->get_block_value (this); | |
bb051d7a TT |
1557 | return m_value.block; |
1558 | } | |
1559 | ||
f1e6e072 TT |
1560 | extern int register_symbol_computed_impl (enum address_class, |
1561 | const struct symbol_computed_ops *); | |
1562 | ||
1563 | extern int register_symbol_block_impl (enum address_class aclass, | |
1564 | const struct symbol_block_ops *ops); | |
1565 | ||
1566 | extern int register_symbol_register_impl (enum address_class, | |
1567 | const struct symbol_register_ops *); | |
1568 | ||
34eaf542 | 1569 | /* An instance of this type is used to represent a C++ template |
68e745e3 | 1570 | function. A symbol is really of this type iff |
f5abd8f2 | 1571 | symbol::is_cplus_template_function is true. */ |
34eaf542 | 1572 | |
68e745e3 | 1573 | struct template_symbol : public symbol |
34eaf542 | 1574 | { |
34eaf542 | 1575 | /* The number of template arguments. */ |
468c0cbb | 1576 | int n_template_arguments = 0; |
34eaf542 TT |
1577 | |
1578 | /* The template arguments. This is an array with | |
1579 | N_TEMPLATE_ARGUMENTS elements. */ | |
468c0cbb | 1580 | struct symbol **template_arguments = nullptr; |
34eaf542 TT |
1581 | }; |
1582 | ||
71a3c369 TT |
1583 | /* A symbol that represents a Rust virtual table object. */ |
1584 | ||
1585 | struct rust_vtable_symbol : public symbol | |
1586 | { | |
1587 | /* The concrete type for which this vtable was created; that is, in | |
1588 | "impl Trait for Type", this is "Type". */ | |
468c0cbb | 1589 | struct type *concrete_type = nullptr; |
71a3c369 TT |
1590 | }; |
1591 | ||
c906108c | 1592 | \f |
c906108c SS |
1593 | /* Each item represents a line-->pc (or the reverse) mapping. This is |
1594 | somewhat more wasteful of space than one might wish, but since only | |
1595 | the files which are actually debugged are read in to core, we don't | |
1596 | waste much space. */ | |
1597 | ||
1598 | struct linetable_entry | |
17c5ed2c | 1599 | { |
1acc9dca | 1600 | /* Set the (unrelocated) PC for this entry. */ |
0434c3ef | 1601 | void set_unrelocated_pc (unrelocated_addr pc) |
1acc9dca TT |
1602 | { m_pc = pc; } |
1603 | ||
1604 | /* Return the unrelocated PC for this entry. */ | |
0434c3ef | 1605 | unrelocated_addr unrelocated_pc () const |
1acc9dca TT |
1606 | { return m_pc; } |
1607 | ||
1608 | /* Return the relocated PC for this entry. */ | |
1609 | CORE_ADDR pc (const struct objfile *objfile) const; | |
1610 | ||
6e6ac32d TT |
1611 | bool operator< (const linetable_entry &other) const |
1612 | { | |
1acc9dca | 1613 | if (m_pc == other.m_pc |
6e6ac32d TT |
1614 | && (line != 0) != (other.line != 0)) |
1615 | return line == 0; | |
1acc9dca | 1616 | return m_pc < other.m_pc; |
6e6ac32d TT |
1617 | } |
1618 | ||
1619 | /* Two entries are equal if they have the same line and PC. The | |
1620 | other members are ignored. */ | |
1621 | bool operator== (const linetable_entry &other) const | |
1acc9dca | 1622 | { return line == other.line && m_pc == other.m_pc; } |
6e6ac32d | 1623 | |
8c95582d | 1624 | /* The line number for this entry. */ |
17c5ed2c | 1625 | int line; |
8c95582d AB |
1626 | |
1627 | /* True if this PC is a good location to place a breakpoint for LINE. */ | |
ddc6677b | 1628 | bool is_stmt : 1; |
8c95582d | 1629 | |
cc96ae7f LS |
1630 | /* True if this location is a good location to place a breakpoint after a |
1631 | function prologue. */ | |
1632 | bool prologue_end : 1; | |
1633 | ||
528b729b GL |
1634 | /* True if this location marks the start of the epilogue. */ |
1635 | bool epilogue_begin : 1; | |
1636 | ||
0434c3ef TT |
1637 | private: |
1638 | ||
8c95582d | 1639 | /* The address for this entry. */ |
48e0f38c | 1640 | unrelocated_addr m_pc; |
17c5ed2c | 1641 | }; |
c906108c SS |
1642 | |
1643 | /* The order of entries in the linetable is significant. They should | |
1644 | be sorted by increasing values of the pc field. If there is more than | |
1645 | one entry for a given pc, then I'm not sure what should happen (and | |
1646 | I not sure whether we currently handle it the best way). | |
1647 | ||
1648 | Example: a C for statement generally looks like this | |
1649 | ||
c5aa993b JM |
1650 | 10 0x100 - for the init/test part of a for stmt. |
1651 | 20 0x200 | |
1652 | 30 0x300 | |
1653 | 10 0x400 - for the increment part of a for stmt. | |
c906108c | 1654 | |
e8717518 FF |
1655 | If an entry has a line number of zero, it marks the start of a PC |
1656 | range for which no line number information is available. It is | |
1657 | acceptable, though wasteful of table space, for such a range to be | |
1658 | zero length. */ | |
c906108c SS |
1659 | |
1660 | struct linetable | |
17c5ed2c DC |
1661 | { |
1662 | int nitems; | |
c906108c | 1663 | |
17c5ed2c DC |
1664 | /* Actually NITEMS elements. If you don't like this use of the |
1665 | `struct hack', you can shove it up your ANSI (seriously, if the | |
1666 | committee tells us how to do it, we can probably go along). */ | |
1667 | struct linetable_entry item[1]; | |
1668 | }; | |
c906108c | 1669 | |
c906108c | 1670 | /* How to relocate the symbols from each section in a symbol file. |
c906108c SS |
1671 | The ordering and meaning of the offsets is file-type-dependent; |
1672 | typically it is indexed by section numbers or symbol types or | |
6a053cb1 | 1673 | something like that. */ |
c906108c | 1674 | |
6a053cb1 | 1675 | typedef std::vector<CORE_ADDR> section_offsets; |
b29c9944 | 1676 | |
c378eb4e | 1677 | /* Each source file or header is represented by a struct symtab. |
43f3e411 | 1678 | The name "symtab" is historical, another name for it is "filetab". |
c906108c SS |
1679 | These objects are chained through the `next' field. */ |
1680 | ||
1681 | struct symtab | |
17c5ed2c | 1682 | { |
c6159652 SM |
1683 | struct compunit_symtab *compunit () const |
1684 | { | |
1685 | return m_compunit; | |
1686 | } | |
1687 | ||
1688 | void set_compunit (struct compunit_symtab *compunit) | |
1689 | { | |
1690 | m_compunit = compunit; | |
1691 | } | |
1692 | ||
977a0c16 | 1693 | const struct linetable *linetable () const |
5b607461 SM |
1694 | { |
1695 | return m_linetable; | |
1696 | } | |
1697 | ||
977a0c16 | 1698 | void set_linetable (const struct linetable *linetable) |
5b607461 SM |
1699 | { |
1700 | m_linetable = linetable; | |
1701 | } | |
1702 | ||
1ee2e9f9 SM |
1703 | enum language language () const |
1704 | { | |
1705 | return m_language; | |
1706 | } | |
1707 | ||
1708 | void set_language (enum language language) | |
1709 | { | |
1710 | m_language = language; | |
1711 | } | |
1712 | ||
b7236fbe DE |
1713 | /* Unordered chain of all filetabs in the compunit, with the exception |
1714 | that the "main" source file is the first entry in the list. */ | |
c906108c | 1715 | |
17c5ed2c | 1716 | struct symtab *next; |
c906108c | 1717 | |
43f3e411 | 1718 | /* Backlink to containing compunit symtab. */ |
c906108c | 1719 | |
c6159652 | 1720 | struct compunit_symtab *m_compunit; |
c906108c | 1721 | |
17c5ed2c DC |
1722 | /* Table mapping core addresses to line numbers for this file. |
1723 | Can be NULL if none. Never shared between different symtabs. */ | |
c906108c | 1724 | |
977a0c16 | 1725 | const struct linetable *m_linetable; |
c906108c | 1726 | |
f71ad555 SM |
1727 | /* Name of this source file, in a form appropriate to print to the user. |
1728 | ||
1729 | This pointer is never nullptr. */ | |
c906108c | 1730 | |
21ea9eec | 1731 | const char *filename; |
c906108c | 1732 | |
f71ad555 SM |
1733 | /* Filename for this source file, used as an identifier to link with |
1734 | related objects such as associated macro_source_file objects. It must | |
1735 | therefore match the name of any macro_source_file object created for this | |
1736 | source file. The value can be the same as FILENAME if it is known to | |
1737 | follow that rule, or another form of the same file name, this is up to | |
1738 | the specific debug info reader. | |
1739 | ||
1740 | This pointer is never nullptr.*/ | |
1741 | const char *filename_for_id; | |
1742 | ||
17c5ed2c | 1743 | /* Language of this source file. */ |
c906108c | 1744 | |
1ee2e9f9 | 1745 | enum language m_language; |
c906108c | 1746 | |
43f3e411 DE |
1747 | /* Full name of file as found by searching the source path. |
1748 | NULL if not yet known. */ | |
1749 | ||
1750 | char *fullname; | |
1751 | }; | |
1752 | ||
102cc235 SM |
1753 | /* A range adapter to allowing iterating over all the file tables in a list. */ |
1754 | ||
1755 | using symtab_range = next_range<symtab>; | |
1756 | ||
43f3e411 DE |
1757 | /* Compunit symtabs contain the actual "symbol table", aka blockvector, as well |
1758 | as the list of all source files (what gdb has historically associated with | |
1759 | the term "symtab"). | |
1760 | Additional information is recorded here that is common to all symtabs in a | |
1761 | compilation unit (DWARF or otherwise). | |
1762 | ||
1763 | Example: | |
1764 | For the case of a program built out of these files: | |
1765 | ||
1766 | foo.c | |
1767 | foo1.h | |
1768 | foo2.h | |
1769 | bar.c | |
1770 | foo1.h | |
1771 | bar.h | |
1772 | ||
1773 | This is recorded as: | |
1774 | ||
1775 | objfile -> foo.c(cu) -> bar.c(cu) -> NULL | |
dda83cd7 SM |
1776 | | | |
1777 | v v | |
1778 | foo.c bar.c | |
1779 | | | | |
1780 | v v | |
1781 | foo1.h foo1.h | |
1782 | | | | |
1783 | v v | |
1784 | foo2.h bar.h | |
1785 | | | | |
1786 | v v | |
1787 | NULL NULL | |
43f3e411 DE |
1788 | |
1789 | where "foo.c(cu)" and "bar.c(cu)" are struct compunit_symtab objects, | |
1790 | and the files foo.c, etc. are struct symtab objects. */ | |
1791 | ||
1792 | struct compunit_symtab | |
1793 | { | |
f1f58f10 SM |
1794 | struct objfile *objfile () const |
1795 | { | |
1796 | return m_objfile; | |
1797 | } | |
1798 | ||
1799 | void set_objfile (struct objfile *objfile) | |
1800 | { | |
1801 | m_objfile = objfile; | |
1802 | } | |
1803 | ||
102cc235 SM |
1804 | symtab_range filetabs () const |
1805 | { | |
1806 | return symtab_range (m_filetabs); | |
1807 | } | |
1808 | ||
43b49762 SM |
1809 | void add_filetab (symtab *filetab) |
1810 | { | |
102cc235 | 1811 | if (m_filetabs == nullptr) |
43b49762 | 1812 | { |
102cc235 SM |
1813 | m_filetabs = filetab; |
1814 | m_last_filetab = filetab; | |
43b49762 SM |
1815 | } |
1816 | else | |
1817 | { | |
102cc235 SM |
1818 | m_last_filetab->next = filetab; |
1819 | m_last_filetab = filetab; | |
43b49762 SM |
1820 | } |
1821 | } | |
1822 | ||
422f1ea2 SM |
1823 | const char *debugformat () const |
1824 | { | |
1825 | return m_debugformat; | |
1826 | } | |
1827 | ||
1828 | void set_debugformat (const char *debugformat) | |
1829 | { | |
1830 | m_debugformat = debugformat; | |
1831 | } | |
1832 | ||
ab5f850e SM |
1833 | const char *producer () const |
1834 | { | |
1835 | return m_producer; | |
1836 | } | |
1837 | ||
1838 | void set_producer (const char *producer) | |
1839 | { | |
1840 | m_producer = producer; | |
1841 | } | |
1842 | ||
0d9acb45 SM |
1843 | const char *dirname () const |
1844 | { | |
1845 | return m_dirname; | |
1846 | } | |
1847 | ||
1848 | void set_dirname (const char *dirname) | |
1849 | { | |
1850 | m_dirname = dirname; | |
1851 | } | |
1852 | ||
63d609de SM |
1853 | struct blockvector *blockvector () |
1854 | { | |
1855 | return m_blockvector; | |
1856 | } | |
1857 | ||
af39c5c8 SM |
1858 | const struct blockvector *blockvector () const |
1859 | { | |
1860 | return m_blockvector; | |
1861 | } | |
1862 | ||
63d609de | 1863 | void set_blockvector (struct blockvector *blockvector) |
af39c5c8 SM |
1864 | { |
1865 | m_blockvector = blockvector; | |
1866 | } | |
1867 | ||
b0fc0e82 SM |
1868 | bool locations_valid () const |
1869 | { | |
1870 | return m_locations_valid; | |
1871 | } | |
1872 | ||
1873 | void set_locations_valid (bool locations_valid) | |
1874 | { | |
1875 | m_locations_valid = locations_valid; | |
1876 | } | |
1877 | ||
3908b699 SM |
1878 | bool epilogue_unwind_valid () const |
1879 | { | |
1880 | return m_epilogue_unwind_valid; | |
1881 | } | |
1882 | ||
1883 | void set_epilogue_unwind_valid (bool epilogue_unwind_valid) | |
1884 | { | |
1885 | m_epilogue_unwind_valid = epilogue_unwind_valid; | |
1886 | } | |
1887 | ||
10cc645b SM |
1888 | struct macro_table *macro_table () const |
1889 | { | |
1890 | return m_macro_table; | |
1891 | } | |
1892 | ||
1893 | void set_macro_table (struct macro_table *macro_table) | |
1894 | { | |
1895 | m_macro_table = macro_table; | |
1896 | } | |
1897 | ||
36664835 SM |
1898 | /* Make PRIMARY_FILETAB the primary filetab of this compunit symtab. |
1899 | ||
1900 | PRIMARY_FILETAB must already be a filetab of this compunit symtab. */ | |
1901 | ||
1902 | void set_primary_filetab (symtab *primary_filetab); | |
1903 | ||
0b17a4f7 SM |
1904 | /* Return the primary filetab of the compunit. */ |
1905 | symtab *primary_filetab () const; | |
1906 | ||
b625c770 SM |
1907 | /* Set m_call_site_htab. */ |
1908 | void set_call_site_htab (htab_t call_site_htab); | |
1909 | ||
1910 | /* Find call_site info for PC. */ | |
1911 | call_site *find_call_site (CORE_ADDR pc) const; | |
1912 | ||
425d5e76 TT |
1913 | /* Return the language of this compunit_symtab. */ |
1914 | enum language language () const; | |
1915 | ||
43f3e411 DE |
1916 | /* Unordered chain of all compunit symtabs of this objfile. */ |
1917 | struct compunit_symtab *next; | |
1918 | ||
1919 | /* Object file from which this symtab information was read. */ | |
f1f58f10 | 1920 | struct objfile *m_objfile; |
43f3e411 DE |
1921 | |
1922 | /* Name of the symtab. | |
1923 | This is *not* intended to be a usable filename, and is | |
1924 | for debugging purposes only. */ | |
1925 | const char *name; | |
1926 | ||
1927 | /* Unordered list of file symtabs, except that by convention the "main" | |
1928 | source file (e.g., .c, .cc) is guaranteed to be first. | |
1929 | Each symtab is a file, either the "main" source file (e.g., .c, .cc) | |
1930 | or header (e.g., .h). */ | |
102cc235 | 1931 | symtab *m_filetabs; |
43f3e411 DE |
1932 | |
1933 | /* Last entry in FILETABS list. | |
1934 | Subfiles are added to the end of the list so they accumulate in order, | |
1935 | with the main source subfile living at the front. | |
1936 | The main reason is so that the main source file symtab is at the head | |
1937 | of the list, and the rest appear in order for debugging convenience. */ | |
102cc235 | 1938 | symtab *m_last_filetab; |
43f3e411 DE |
1939 | |
1940 | /* Non-NULL string that identifies the format of the debugging information, | |
1941 | such as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful | |
17c5ed2c | 1942 | for automated testing of gdb but may also be information that is |
c378eb4e | 1943 | useful to the user. */ |
422f1ea2 | 1944 | const char *m_debugformat; |
c906108c | 1945 | |
43f3e411 | 1946 | /* String of producer version information, or NULL if we don't know. */ |
ab5f850e | 1947 | const char *m_producer; |
c906108c | 1948 | |
43f3e411 | 1949 | /* Directory in which it was compiled, or NULL if we don't know. */ |
0d9acb45 | 1950 | const char *m_dirname; |
c906108c | 1951 | |
43f3e411 DE |
1952 | /* List of all symbol scope blocks for this symtab. It is shared among |
1953 | all symtabs in a given compilation unit. */ | |
63d609de | 1954 | struct blockvector *m_blockvector; |
c906108c | 1955 | |
43f3e411 DE |
1956 | /* Symtab has been compiled with both optimizations and debug info so that |
1957 | GDB may stop skipping prologues as variables locations are valid already | |
1958 | at function entry points. */ | |
b0fc0e82 | 1959 | unsigned int m_locations_valid : 1; |
c906108c | 1960 | |
43f3e411 DE |
1961 | /* DWARF unwinder for this CU is valid even for epilogues (PC at the return |
1962 | instruction). This is supported by GCC since 4.5.0. */ | |
3908b699 | 1963 | unsigned int m_epilogue_unwind_valid : 1; |
8e3b41a9 | 1964 | |
43f3e411 | 1965 | /* struct call_site entries for this compilation unit or NULL. */ |
b625c770 | 1966 | htab_t m_call_site_htab; |
b5b04b5b | 1967 | |
43f3e411 DE |
1968 | /* The macro table for this symtab. Like the blockvector, this |
1969 | is shared between different symtabs in a given compilation unit. | |
1970 | It's debatable whether it *should* be shared among all the symtabs in | |
1971 | the given compilation unit, but it currently is. */ | |
10cc645b | 1972 | struct macro_table *m_macro_table; |
43f3e411 | 1973 | |
b5b04b5b | 1974 | /* If non-NULL, then this points to a NULL-terminated vector of |
43f3e411 DE |
1975 | included compunits. When searching the static or global |
1976 | block of this compunit, the corresponding block of all | |
1977 | included compunits will also be searched. Note that this | |
b5b04b5b TT |
1978 | list must be flattened -- the symbol reader is responsible for |
1979 | ensuring that this vector contains the transitive closure of all | |
43f3e411 DE |
1980 | included compunits. */ |
1981 | struct compunit_symtab **includes; | |
b5b04b5b | 1982 | |
43f3e411 DE |
1983 | /* If this is an included compunit, this points to one includer |
1984 | of the table. This user is considered the canonical compunit | |
1985 | containing this one. An included compunit may itself be | |
b5b04b5b | 1986 | included by another. */ |
43f3e411 | 1987 | struct compunit_symtab *user; |
17c5ed2c | 1988 | }; |
c906108c | 1989 | |
9be25986 SM |
1990 | using compunit_symtab_range = next_range<compunit_symtab>; |
1991 | ||
7b1eff95 TV |
1992 | /* Return true if this symtab is the "main" symtab of its compunit_symtab. */ |
1993 | ||
1994 | static inline bool | |
1995 | is_main_symtab_of_compunit_symtab (struct symtab *symtab) | |
1996 | { | |
c6159652 | 1997 | return symtab == symtab->compunit ()->primary_filetab (); |
7b1eff95 | 1998 | } |
cb911672 TV |
1999 | |
2000 | /* Return true if epilogue unwind info of CUST is valid. */ | |
2001 | ||
2002 | static inline bool | |
2003 | compunit_epilogue_unwind_valid (struct compunit_symtab *cust) | |
2004 | { | |
2005 | /* In absence of producer information, assume epilogue unwind info is | |
8908d9c4 | 2006 | valid. */ |
cb911672 | 2007 | if (cust == nullptr) |
8908d9c4 | 2008 | return true; |
cb911672 TV |
2009 | |
2010 | return cust->epilogue_unwind_valid (); | |
2011 | } | |
c906108c | 2012 | \f |
c5aa993b | 2013 | |
c906108c | 2014 | /* The virtual function table is now an array of structures which have the |
a960f249 | 2015 | form { int16 offset, delta; void *pfn; }. |
c906108c SS |
2016 | |
2017 | In normal virtual function tables, OFFSET is unused. | |
2018 | DELTA is the amount which is added to the apparent object's base | |
2019 | address in order to point to the actual object to which the | |
2020 | virtual function should be applied. | |
2021 | PFN is a pointer to the virtual function. | |
2022 | ||
c378eb4e | 2023 | Note that this macro is g++ specific (FIXME). */ |
c5aa993b | 2024 | |
c906108c SS |
2025 | #define VTBL_FNADDR_OFFSET 2 |
2026 | ||
c378eb4e | 2027 | /* External variables and functions for the objects described above. */ |
c906108c | 2028 | |
c378eb4e | 2029 | /* True if we are nested inside psymtab_to_symtab. */ |
c906108c SS |
2030 | |
2031 | extern int currently_reading_symtab; | |
2032 | ||
c906108c SS |
2033 | /* symtab.c lookup functions */ |
2034 | ||
7fc830e2 MK |
2035 | extern const char multiple_symbols_ask[]; |
2036 | extern const char multiple_symbols_all[]; | |
2037 | extern const char multiple_symbols_cancel[]; | |
717d2f5a JB |
2038 | |
2039 | const char *multiple_symbols_select_mode (void); | |
2040 | ||
c378eb4e | 2041 | /* lookup a symbol table by source file name. */ |
c906108c | 2042 | |
1f8cc6db | 2043 | extern struct symtab *lookup_symtab (const char *); |
c906108c | 2044 | |
1993b719 TT |
2045 | /* An object of this type is passed as the 'is_a_field_of_this' |
2046 | argument to lookup_symbol and lookup_symbol_in_language. */ | |
2047 | ||
2048 | struct field_of_this_result | |
2049 | { | |
2050 | /* The type in which the field was found. If this is NULL then the | |
2051 | symbol was not found in 'this'. If non-NULL, then one of the | |
2052 | other fields will be non-NULL as well. */ | |
2053 | ||
2054 | struct type *type; | |
2055 | ||
2056 | /* If the symbol was found as an ordinary field of 'this', then this | |
2057 | is non-NULL and points to the particular field. */ | |
2058 | ||
2059 | struct field *field; | |
2060 | ||
cf901d3b | 2061 | /* If the symbol was found as a function field of 'this', then this |
1993b719 TT |
2062 | is non-NULL and points to the particular field. */ |
2063 | ||
2064 | struct fn_fieldlist *fn_field; | |
2065 | }; | |
2066 | ||
cf901d3b DE |
2067 | /* Find the definition for a specified symbol name NAME |
2068 | in domain DOMAIN in language LANGUAGE, visible from lexical block BLOCK | |
2069 | if non-NULL or from global/static blocks if BLOCK is NULL. | |
2070 | Returns the struct symbol pointer, or NULL if no symbol is found. | |
2071 | C++: if IS_A_FIELD_OF_THIS is non-NULL on entry, check to see if | |
2072 | NAME is a field of the current implied argument `this'. If so fill in the | |
2073 | fields of IS_A_FIELD_OF_THIS, otherwise the fields are set to NULL. | |
cf901d3b | 2074 | The symbol's section is fixed up if necessary. */ |
53c5240f | 2075 | |
d12307c1 PMR |
2076 | extern struct block_symbol |
2077 | lookup_symbol_in_language (const char *, | |
2078 | const struct block *, | |
2079 | const domain_enum, | |
2080 | enum language, | |
2081 | struct field_of_this_result *); | |
53c5240f | 2082 | |
cf901d3b | 2083 | /* Same as lookup_symbol_in_language, but using the current language. */ |
c906108c | 2084 | |
d12307c1 PMR |
2085 | extern struct block_symbol lookup_symbol (const char *, |
2086 | const struct block *, | |
2087 | const domain_enum, | |
2088 | struct field_of_this_result *); | |
c906108c | 2089 | |
de63c46b PA |
2090 | /* Find the definition for a specified symbol search name in domain |
2091 | DOMAIN, visible from lexical block BLOCK if non-NULL or from | |
2092 | global/static blocks if BLOCK is NULL. The passed-in search name | |
2093 | should not come from the user; instead it should already be a | |
987012b8 | 2094 | search name as retrieved from a search_name () call. See definition of |
de63c46b PA |
2095 | symbol_name_match_type::SEARCH_NAME. Returns the struct symbol |
2096 | pointer, or NULL if no symbol is found. The symbol's section is | |
2097 | fixed up if necessary. */ | |
2098 | ||
2099 | extern struct block_symbol lookup_symbol_search_name (const char *search_name, | |
2100 | const struct block *block, | |
2101 | domain_enum domain); | |
2102 | ||
5f9a71c3 DC |
2103 | /* Some helper functions for languages that need to write their own |
2104 | lookup_symbol_nonlocal functions. */ | |
2105 | ||
2106 | /* Lookup a symbol in the static block associated to BLOCK, if there | |
cf901d3b | 2107 | is one; do nothing if BLOCK is NULL or a global block. |
d12307c1 | 2108 | Upon success fixes up the symbol's section if necessary. */ |
5f9a71c3 | 2109 | |
d12307c1 PMR |
2110 | extern struct block_symbol |
2111 | lookup_symbol_in_static_block (const char *name, | |
2112 | const struct block *block, | |
2113 | const domain_enum domain); | |
5f9a71c3 | 2114 | |
08724ab7 | 2115 | /* Search all static file-level symbols for NAME from DOMAIN. |
d12307c1 | 2116 | Upon success fixes up the symbol's section if necessary. */ |
08724ab7 | 2117 | |
d12307c1 PMR |
2118 | extern struct block_symbol lookup_static_symbol (const char *name, |
2119 | const domain_enum domain); | |
08724ab7 | 2120 | |
cf901d3b | 2121 | /* Lookup a symbol in all files' global blocks. |
67be31e5 DE |
2122 | |
2123 | If BLOCK is non-NULL then it is used for two things: | |
2124 | 1) If a target-specific lookup routine for libraries exists, then use the | |
2125 | routine for the objfile of BLOCK, and | |
2126 | 2) The objfile of BLOCK is used to assist in determining the search order | |
2127 | if the target requires it. | |
2128 | See gdbarch_iterate_over_objfiles_in_search_order. | |
2129 | ||
d12307c1 | 2130 | Upon success fixes up the symbol's section if necessary. */ |
5f9a71c3 | 2131 | |
d12307c1 PMR |
2132 | extern struct block_symbol |
2133 | lookup_global_symbol (const char *name, | |
2134 | const struct block *block, | |
2135 | const domain_enum domain); | |
5f9a71c3 | 2136 | |
d1a2d36d | 2137 | /* Lookup a symbol in block BLOCK. |
d12307c1 | 2138 | Upon success fixes up the symbol's section if necessary. */ |
5f9a71c3 | 2139 | |
d12307c1 PMR |
2140 | extern struct symbol * |
2141 | lookup_symbol_in_block (const char *name, | |
de63c46b | 2142 | symbol_name_match_type match_type, |
d12307c1 PMR |
2143 | const struct block *block, |
2144 | const domain_enum domain); | |
5f9a71c3 | 2145 | |
cf901d3b DE |
2146 | /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if |
2147 | found, or NULL if not found. */ | |
2148 | ||
d12307c1 PMR |
2149 | extern struct block_symbol |
2150 | lookup_language_this (const struct language_defn *lang, | |
2151 | const struct block *block); | |
66a17cb6 | 2152 | |
cf901d3b | 2153 | /* Lookup a [struct, union, enum] by name, within a specified block. */ |
c906108c | 2154 | |
270140bd | 2155 | extern struct type *lookup_struct (const char *, const struct block *); |
c906108c | 2156 | |
270140bd | 2157 | extern struct type *lookup_union (const char *, const struct block *); |
c906108c | 2158 | |
270140bd | 2159 | extern struct type *lookup_enum (const char *, const struct block *); |
c906108c | 2160 | |
c906108c SS |
2161 | /* from blockframe.c: */ |
2162 | ||
cd2bb709 PA |
2163 | /* lookup the function symbol corresponding to the address. The |
2164 | return value will not be an inlined function; the containing | |
2165 | function will be returned instead. */ | |
c906108c | 2166 | |
a14ed312 | 2167 | extern struct symbol *find_pc_function (CORE_ADDR); |
c906108c | 2168 | |
cd2bb709 PA |
2169 | /* lookup the function corresponding to the address and section. The |
2170 | return value will not be an inlined function; the containing | |
2171 | function will be returned instead. */ | |
c906108c | 2172 | |
714835d5 | 2173 | extern struct symbol *find_pc_sect_function (CORE_ADDR, struct obj_section *); |
c5aa993b | 2174 | |
cd2bb709 PA |
2175 | /* lookup the function symbol corresponding to the address and |
2176 | section. The return value will be the closest enclosing function, | |
2177 | which might be an inline function. */ | |
2178 | ||
2179 | extern struct symbol *find_pc_sect_containing_function | |
2180 | (CORE_ADDR pc, struct obj_section *section); | |
2181 | ||
71a3c369 TT |
2182 | /* Find the symbol at the given address. Returns NULL if no symbol |
2183 | found. Only exact matches for ADDRESS are considered. */ | |
2184 | ||
2185 | extern struct symbol *find_symbol_at_address (CORE_ADDR); | |
2186 | ||
fc811edd KB |
2187 | /* Finds the "function" (text symbol) that is smaller than PC but |
2188 | greatest of all of the potential text symbols in SECTION. Sets | |
2189 | *NAME and/or *ADDRESS conditionally if that pointer is non-null. | |
2190 | If ENDADDR is non-null, then set *ENDADDR to be the end of the | |
2191 | function (exclusive). If the optional parameter BLOCK is non-null, | |
2192 | then set *BLOCK to the address of the block corresponding to the | |
2193 | function symbol, if such a symbol could be found during the lookup; | |
2194 | nullptr is used as a return value for *BLOCK if no block is found. | |
2195 | This function either succeeds or fails (not halfway succeeds). If | |
2196 | it succeeds, it sets *NAME, *ADDRESS, and *ENDADDR to real | |
ececd218 CB |
2197 | information and returns true. If it fails, it sets *NAME, *ADDRESS |
2198 | and *ENDADDR to zero and returns false. | |
fc811edd KB |
2199 | |
2200 | If the function in question occupies non-contiguous ranges, | |
2201 | *ADDRESS and *ENDADDR are (subject to the conditions noted above) set | |
2202 | to the start and end of the range in which PC is found. Thus | |
2203 | *ADDRESS <= PC < *ENDADDR with no intervening gaps (in which ranges | |
2204 | from other functions might be found). | |
2205 | ||
2206 | This property allows find_pc_partial_function to be used (as it had | |
2207 | been prior to the introduction of non-contiguous range support) by | |
2208 | various tdep files for finding a start address and limit address | |
2209 | for prologue analysis. This still isn't ideal, however, because we | |
2210 | probably shouldn't be doing prologue analysis (in which | |
2211 | instructions are scanned to determine frame size and stack layout) | |
2212 | for any range that doesn't contain the entry pc. Moreover, a good | |
2213 | argument can be made that prologue analysis ought to be performed | |
2214 | starting from the entry pc even when PC is within some other range. | |
2215 | This might suggest that *ADDRESS and *ENDADDR ought to be set to the | |
2216 | limits of the entry pc range, but that will cause the | |
2217 | *ADDRESS <= PC < *ENDADDR condition to be violated; many of the | |
59adbf5d KB |
2218 | callers of find_pc_partial_function expect this condition to hold. |
2219 | ||
2220 | Callers which require the start and/or end addresses for the range | |
2221 | containing the entry pc should instead call | |
2222 | find_function_entry_range_from_pc. */ | |
fc811edd | 2223 | |
ececd218 CB |
2224 | extern bool find_pc_partial_function (CORE_ADDR pc, const char **name, |
2225 | CORE_ADDR *address, CORE_ADDR *endaddr, | |
2226 | const struct block **block = nullptr); | |
c906108c | 2227 | |
f75a0693 AB |
2228 | /* Like find_pc_partial_function, above, but returns the underlying |
2229 | general_symbol_info (rather than the name) as an out parameter. */ | |
2230 | ||
2231 | extern bool find_pc_partial_function_sym | |
2232 | (CORE_ADDR pc, const general_symbol_info **sym, | |
2233 | CORE_ADDR *address, CORE_ADDR *endaddr, | |
2234 | const struct block **block = nullptr); | |
2235 | ||
59adbf5d KB |
2236 | /* Like find_pc_partial_function, above, but *ADDRESS and *ENDADDR are |
2237 | set to start and end addresses of the range containing the entry pc. | |
2238 | ||
2239 | Note that it is not necessarily the case that (for non-NULL ADDRESS | |
2240 | and ENDADDR arguments) the *ADDRESS <= PC < *ENDADDR condition will | |
2241 | hold. | |
2242 | ||
2243 | See comment for find_pc_partial_function, above, for further | |
2244 | explanation. */ | |
2245 | ||
2246 | extern bool find_function_entry_range_from_pc (CORE_ADDR pc, | |
2247 | const char **name, | |
2248 | CORE_ADDR *address, | |
2249 | CORE_ADDR *endaddr); | |
2250 | ||
8388016d PA |
2251 | /* Return the type of a function with its first instruction exactly at |
2252 | the PC address. Return NULL otherwise. */ | |
2253 | ||
2254 | extern struct type *find_function_type (CORE_ADDR pc); | |
2255 | ||
2256 | /* See if we can figure out the function's actual type from the type | |
2257 | that the resolver returns. RESOLVER_FUNADDR is the address of the | |
2258 | ifunc resolver. */ | |
2259 | ||
2260 | extern struct type *find_gnu_ifunc_target_type (CORE_ADDR resolver_funaddr); | |
2261 | ||
ca31ab1d PA |
2262 | /* Find the GNU ifunc minimal symbol that matches SYM. */ |
2263 | extern bound_minimal_symbol find_gnu_ifunc (const symbol *sym); | |
2264 | ||
a14ed312 | 2265 | extern void clear_pc_function_cache (void); |
c906108c | 2266 | |
c378eb4e | 2267 | /* lookup full symbol table by address. */ |
c906108c | 2268 | |
43f3e411 | 2269 | extern struct compunit_symtab *find_pc_compunit_symtab (CORE_ADDR); |
c906108c | 2270 | |
c378eb4e | 2271 | /* lookup full symbol table by address and section. */ |
c906108c | 2272 | |
43f3e411 DE |
2273 | extern struct compunit_symtab * |
2274 | find_pc_sect_compunit_symtab (CORE_ADDR, struct obj_section *); | |
c906108c | 2275 | |
ececd218 | 2276 | extern bool find_pc_line_pc_range (CORE_ADDR, CORE_ADDR *, CORE_ADDR *); |
c906108c | 2277 | |
9dec38d3 | 2278 | extern void reread_symbols (int from_tty); |
c906108c | 2279 | |
cf901d3b DE |
2280 | /* Look up a type named NAME in STRUCT_DOMAIN in the current language. |
2281 | The type returned must not be opaque -- i.e., must have at least one field | |
2282 | defined. */ | |
2283 | ||
a14ed312 | 2284 | extern struct type *lookup_transparent_type (const char *); |
c906108c | 2285 | |
cf901d3b | 2286 | extern struct type *basic_lookup_transparent_type (const char *); |
c906108c | 2287 | |
c378eb4e | 2288 | /* Macro for name of symbol to indicate a file compiled with gcc. */ |
c906108c SS |
2289 | #ifndef GCC_COMPILED_FLAG_SYMBOL |
2290 | #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled." | |
2291 | #endif | |
2292 | ||
c378eb4e | 2293 | /* Macro for name of symbol to indicate a file compiled with gcc2. */ |
c906108c SS |
2294 | #ifndef GCC2_COMPILED_FLAG_SYMBOL |
2295 | #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled." | |
2296 | #endif | |
2297 | ||
ececd218 | 2298 | extern bool in_gnu_ifunc_stub (CORE_ADDR pc); |
0875794a | 2299 | |
07be84bf JK |
2300 | /* Functions for resolving STT_GNU_IFUNC symbols which are implemented only |
2301 | for ELF symbol files. */ | |
2302 | ||
2303 | struct gnu_ifunc_fns | |
2304 | { | |
2305 | /* See elf_gnu_ifunc_resolve_addr for its real implementation. */ | |
2306 | CORE_ADDR (*gnu_ifunc_resolve_addr) (struct gdbarch *gdbarch, CORE_ADDR pc); | |
2307 | ||
2308 | /* See elf_gnu_ifunc_resolve_name for its real implementation. */ | |
ececd218 | 2309 | bool (*gnu_ifunc_resolve_name) (const char *function_name, |
07be84bf | 2310 | CORE_ADDR *function_address_p); |
0e30163f JK |
2311 | |
2312 | /* See elf_gnu_ifunc_resolver_stop for its real implementation. */ | |
74421c0b | 2313 | void (*gnu_ifunc_resolver_stop) (code_breakpoint *b); |
0e30163f JK |
2314 | |
2315 | /* See elf_gnu_ifunc_resolver_return_stop for its real implementation. */ | |
74421c0b | 2316 | void (*gnu_ifunc_resolver_return_stop) (code_breakpoint *b); |
07be84bf JK |
2317 | }; |
2318 | ||
2319 | #define gnu_ifunc_resolve_addr gnu_ifunc_fns_p->gnu_ifunc_resolve_addr | |
2320 | #define gnu_ifunc_resolve_name gnu_ifunc_fns_p->gnu_ifunc_resolve_name | |
0e30163f JK |
2321 | #define gnu_ifunc_resolver_stop gnu_ifunc_fns_p->gnu_ifunc_resolver_stop |
2322 | #define gnu_ifunc_resolver_return_stop \ | |
2323 | gnu_ifunc_fns_p->gnu_ifunc_resolver_return_stop | |
07be84bf JK |
2324 | |
2325 | extern const struct gnu_ifunc_fns *gnu_ifunc_fns_p; | |
2326 | ||
9efe17a3 | 2327 | extern CORE_ADDR find_solib_trampoline_target (frame_info_ptr, CORE_ADDR); |
c906108c | 2328 | |
c906108c | 2329 | struct symtab_and_line |
17c5ed2c | 2330 | { |
6c95b8df | 2331 | /* The program space of this sal. */ |
51abb421 | 2332 | struct program_space *pspace = NULL; |
6c95b8df | 2333 | |
51abb421 | 2334 | struct symtab *symtab = NULL; |
06871ae8 | 2335 | struct symbol *symbol = NULL; |
51abb421 | 2336 | struct obj_section *section = NULL; |
3467ec66 | 2337 | struct minimal_symbol *msymbol = NULL; |
17c5ed2c DC |
2338 | /* Line number. Line numbers start at 1 and proceed through symtab->nlines. |
2339 | 0 is never a valid line number; it is used to indicate that line number | |
2340 | information is not available. */ | |
51abb421 | 2341 | int line = 0; |
17c5ed2c | 2342 | |
51abb421 PA |
2343 | CORE_ADDR pc = 0; |
2344 | CORE_ADDR end = 0; | |
2345 | bool explicit_pc = false; | |
2346 | bool explicit_line = false; | |
55aa24fb | 2347 | |
8c95582d AB |
2348 | /* If the line number information is valid, then this indicates if this |
2349 | line table entry had the is-stmt flag set or not. */ | |
2350 | bool is_stmt = false; | |
2351 | ||
55aa24fb | 2352 | /* The probe associated with this symtab_and_line. */ |
935676c9 | 2353 | probe *prob = NULL; |
729662a5 TT |
2354 | /* If PROBE is not NULL, then this is the objfile in which the probe |
2355 | originated. */ | |
51abb421 | 2356 | struct objfile *objfile = NULL; |
17c5ed2c | 2357 | }; |
c906108c | 2358 | |
c5aa993b | 2359 | \f |
c906108c | 2360 | |
c906108c SS |
2361 | /* Given a pc value, return line number it is in. Second arg nonzero means |
2362 | if pc is on the boundary use the previous statement's line number. */ | |
2363 | ||
a14ed312 | 2364 | extern struct symtab_and_line find_pc_line (CORE_ADDR, int); |
c906108c | 2365 | |
c378eb4e | 2366 | /* Same function, but specify a section as well as an address. */ |
c906108c | 2367 | |
714835d5 UW |
2368 | extern struct symtab_and_line find_pc_sect_line (CORE_ADDR, |
2369 | struct obj_section *, int); | |
c906108c | 2370 | |
fe6356de CL |
2371 | /* Given PC, and assuming it is part of a range of addresses that is part of |
2372 | a line, go back through the linetable and find the starting PC of that | |
2373 | line. | |
2374 | ||
2375 | For example, suppose we have 3 PC ranges for line X: | |
2376 | ||
2377 | Line X - [0x0 - 0x8] | |
2378 | Line X - [0x8 - 0x10] | |
2379 | Line X - [0x10 - 0x18] | |
2380 | ||
2381 | If we call the function with PC == 0x14, we want to return 0x0, as that is | |
2382 | the starting PC of line X, and the ranges are contiguous. | |
2383 | */ | |
2384 | ||
2385 | extern std::optional<CORE_ADDR> find_line_range_start (CORE_ADDR pc); | |
2386 | ||
34248c3a DE |
2387 | /* Wrapper around find_pc_line to just return the symtab. */ |
2388 | ||
2389 | extern struct symtab *find_pc_line_symtab (CORE_ADDR); | |
2390 | ||
c906108c SS |
2391 | /* Given a symtab and line number, return the pc there. */ |
2392 | ||
ececd218 | 2393 | extern bool find_line_pc (struct symtab *, int, CORE_ADDR *); |
c906108c | 2394 | |
ececd218 CB |
2395 | extern bool find_line_pc_range (struct symtab_and_line, CORE_ADDR *, |
2396 | CORE_ADDR *); | |
c906108c | 2397 | |
a14ed312 | 2398 | extern void resolve_sal_pc (struct symtab_and_line *); |
c906108c | 2399 | |
f176c4b5 | 2400 | /* solib.c */ |
c906108c | 2401 | |
a14ed312 | 2402 | extern void clear_solib (void); |
c906108c | 2403 | |
c6756f62 PA |
2404 | /* The reason we're calling into a completion match list collector |
2405 | function. */ | |
2406 | enum class complete_symbol_mode | |
2407 | { | |
2408 | /* Completing an expression. */ | |
2409 | EXPRESSION, | |
2410 | ||
2411 | /* Completing a linespec. */ | |
2412 | LINESPEC, | |
2413 | }; | |
2414 | ||
eb3ff9a5 PA |
2415 | extern void default_collect_symbol_completion_matches_break_on |
2416 | (completion_tracker &tracker, | |
c6756f62 | 2417 | complete_symbol_mode mode, |
b5ec771e | 2418 | symbol_name_match_type name_match_type, |
eb3ff9a5 | 2419 | const char *text, const char *word, const char *break_on, |
2f68a895 | 2420 | enum type_code code); |
b5ec771e PA |
2421 | extern void collect_symbol_completion_matches |
2422 | (completion_tracker &tracker, | |
2423 | complete_symbol_mode mode, | |
2424 | symbol_name_match_type name_match_type, | |
2425 | const char *, const char *); | |
eb3ff9a5 PA |
2426 | extern void collect_symbol_completion_matches_type (completion_tracker &tracker, |
2427 | const char *, const char *, | |
2f68a895 | 2428 | enum type_code); |
c906108c | 2429 | |
b5ec771e PA |
2430 | extern void collect_file_symbol_completion_matches |
2431 | (completion_tracker &tracker, | |
2432 | complete_symbol_mode, | |
2433 | symbol_name_match_type name_match_type, | |
2434 | const char *, const char *, const char *); | |
c94fdfd0 | 2435 | |
eb3ff9a5 PA |
2436 | extern completion_list |
2437 | make_source_files_completion_list (const char *, const char *); | |
c94fdfd0 | 2438 | |
f9d67a22 PA |
2439 | /* Return whether SYM is a function/method, as opposed to a data symbol. */ |
2440 | ||
2441 | extern bool symbol_is_function_or_method (symbol *sym); | |
2442 | ||
2443 | /* Return whether MSYMBOL is a function/method, as opposed to a data | |
2444 | symbol */ | |
2445 | ||
2446 | extern bool symbol_is_function_or_method (minimal_symbol *msymbol); | |
2447 | ||
2448 | /* Return whether SYM should be skipped in completion mode MODE. In | |
2449 | linespec mode, we're only interested in functions/methods. */ | |
2450 | ||
2451 | template<typename Symbol> | |
2452 | static bool | |
2453 | completion_skip_symbol (complete_symbol_mode mode, Symbol *sym) | |
2454 | { | |
2455 | return (mode == complete_symbol_mode::LINESPEC | |
2456 | && !symbol_is_function_or_method (sym)); | |
2457 | } | |
2458 | ||
c906108c SS |
2459 | /* symtab.c */ |
2460 | ||
ececd218 | 2461 | bool matching_obj_sections (struct obj_section *, struct obj_section *); |
94277a38 | 2462 | |
ececd218 | 2463 | extern struct symtab *find_line_symtab (struct symtab *, int, int *, bool *); |
50641945 | 2464 | |
42ddae10 PA |
2465 | /* Given a function symbol SYM, find the symtab and line for the start |
2466 | of the function. If FUNFIRSTLINE is true, we want the first line | |
2467 | of real code inside the function. */ | |
2468 | extern symtab_and_line find_function_start_sal (symbol *sym, bool | |
2469 | funfirstline); | |
2470 | ||
2471 | /* Same, but start with a function address/section instead of a | |
2472 | symbol. */ | |
2473 | extern symtab_and_line find_function_start_sal (CORE_ADDR func_addr, | |
2474 | obj_section *section, | |
2475 | bool funfirstline); | |
50641945 | 2476 | |
059acae7 UW |
2477 | extern void skip_prologue_sal (struct symtab_and_line *); |
2478 | ||
c906108c SS |
2479 | /* symtab.c */ |
2480 | ||
d80b854b UW |
2481 | extern CORE_ADDR skip_prologue_using_sal (struct gdbarch *gdbarch, |
2482 | CORE_ADDR func_addr); | |
634aa483 | 2483 | |
49c1de0e TT |
2484 | /* If SYM requires a section index, find it either via minimal symbols |
2485 | or examining OBJFILE's sections. Note that SYM's current address | |
2486 | must not have any runtime offsets applied. */ | |
2487 | ||
2488 | extern void fixup_symbol_section (struct symbol *sym, | |
2489 | struct objfile *objfile); | |
c906108c | 2490 | |
bf223d3e PA |
2491 | /* If MSYMBOL is an text symbol, look for a function debug symbol with |
2492 | the same address. Returns NULL if not found. This is necessary in | |
2493 | case a function is an alias to some other function, because debug | |
2494 | information is only emitted for the alias target function's | |
2495 | definition, not for the alias. */ | |
2496 | extern symbol *find_function_alias_target (bound_minimal_symbol msymbol); | |
2497 | ||
c906108c SS |
2498 | /* Symbol searching */ |
2499 | ||
470c0b1c AB |
2500 | /* When using the symbol_searcher struct to search for symbols, a vector of |
2501 | the following structs is returned. */ | |
c906108c | 2502 | struct symbol_search |
17c5ed2c | 2503 | { |
e8aafb7d | 2504 | symbol_search (block_enum block_, struct symbol *symbol_) |
b9c04fb2 TT |
2505 | : block (block_), |
2506 | symbol (symbol_) | |
2507 | { | |
2508 | msymbol.minsym = nullptr; | |
2509 | msymbol.objfile = nullptr; | |
2510 | } | |
2511 | ||
e8aafb7d | 2512 | symbol_search (block_enum block_, struct minimal_symbol *minsym, |
b9c04fb2 TT |
2513 | struct objfile *objfile) |
2514 | : block (block_), | |
2515 | symbol (nullptr) | |
2516 | { | |
2517 | msymbol.minsym = minsym; | |
2518 | msymbol.objfile = objfile; | |
2519 | } | |
2520 | ||
2521 | bool operator< (const symbol_search &other) const | |
2522 | { | |
2523 | return compare_search_syms (*this, other) < 0; | |
2524 | } | |
2525 | ||
2526 | bool operator== (const symbol_search &other) const | |
2527 | { | |
2528 | return compare_search_syms (*this, other) == 0; | |
2529 | } | |
2530 | ||
e8aafb7d TT |
2531 | /* The block in which the match was found. Either STATIC_BLOCK or |
2532 | GLOBAL_BLOCK. */ | |
2533 | block_enum block; | |
c906108c | 2534 | |
17c5ed2c | 2535 | /* Information describing what was found. |
c906108c | 2536 | |
d01060f0 | 2537 | If symbol is NOT NULL, then information was found for this match. */ |
17c5ed2c | 2538 | struct symbol *symbol; |
c906108c | 2539 | |
17c5ed2c | 2540 | /* If msymbol is non-null, then a match was made on something for |
c378eb4e | 2541 | which only minimal_symbols exist. */ |
7c7b6655 | 2542 | struct bound_minimal_symbol msymbol; |
c906108c | 2543 | |
b9c04fb2 TT |
2544 | private: |
2545 | ||
2546 | static int compare_search_syms (const symbol_search &sym_a, | |
2547 | const symbol_search &sym_b); | |
17c5ed2c | 2548 | }; |
c906108c | 2549 | |
470c0b1c AB |
2550 | /* In order to search for global symbols of a particular kind matching |
2551 | particular regular expressions, create an instance of this structure and | |
2552 | call the SEARCH member function. */ | |
2553 | class global_symbol_searcher | |
2554 | { | |
2555 | public: | |
2556 | ||
2557 | /* Constructor. */ | |
2558 | global_symbol_searcher (enum search_domain kind, | |
2559 | const char *symbol_name_regexp) | |
2560 | : m_kind (kind), | |
2561 | m_symbol_name_regexp (symbol_name_regexp) | |
2562 | { | |
2563 | /* The symbol searching is designed to only find one kind of thing. */ | |
2564 | gdb_assert (m_kind != ALL_DOMAIN); | |
2565 | } | |
2566 | ||
2567 | /* Set the optional regexp that matches against the symbol type. */ | |
2568 | void set_symbol_type_regexp (const char *regexp) | |
2569 | { | |
2570 | m_symbol_type_regexp = regexp; | |
2571 | } | |
2572 | ||
2573 | /* Set the flag to exclude minsyms from the search results. */ | |
2574 | void set_exclude_minsyms (bool exclude_minsyms) | |
2575 | { | |
2576 | m_exclude_minsyms = exclude_minsyms; | |
2577 | } | |
2578 | ||
c2512106 AB |
2579 | /* Set the maximum number of search results to be returned. */ |
2580 | void set_max_search_results (size_t max_search_results) | |
2581 | { | |
2582 | m_max_search_results = max_search_results; | |
2583 | } | |
2584 | ||
470c0b1c AB |
2585 | /* Search the symbols from all objfiles in the current program space |
2586 | looking for matches as defined by the current state of this object. | |
2587 | ||
2588 | Within each file the results are sorted locally; each symtab's global | |
2589 | and static blocks are separately alphabetized. Duplicate entries are | |
2590 | removed. */ | |
2591 | std::vector<symbol_search> search () const; | |
2592 | ||
2593 | /* The set of source files to search in for matching symbols. This is | |
2594 | currently public so that it can be populated after this object has | |
2595 | been constructed. */ | |
2596 | std::vector<const char *> filenames; | |
2597 | ||
2598 | private: | |
2599 | /* The kind of symbols are we searching for. | |
2600 | VARIABLES_DOMAIN - Search all symbols, excluding functions, type | |
dda83cd7 | 2601 | names, and constants (enums). |
470c0b1c AB |
2602 | FUNCTIONS_DOMAIN - Search all functions.. |
2603 | TYPES_DOMAIN - Search all type names. | |
2604 | MODULES_DOMAIN - Search all Fortran modules. | |
2605 | ALL_DOMAIN - Not valid for this function. */ | |
2606 | enum search_domain m_kind; | |
2607 | ||
2608 | /* Regular expression to match against the symbol name. */ | |
2609 | const char *m_symbol_name_regexp = nullptr; | |
2610 | ||
2611 | /* Regular expression to match against the symbol type. */ | |
2612 | const char *m_symbol_type_regexp = nullptr; | |
2613 | ||
2614 | /* When this flag is false then minsyms that match M_SYMBOL_REGEXP will | |
2615 | be included in the results, otherwise they are excluded. */ | |
2616 | bool m_exclude_minsyms = false; | |
f97a63c5 | 2617 | |
c2512106 AB |
2618 | /* Maximum number of search results. We currently impose a hard limit |
2619 | of SIZE_MAX, there is no "unlimited". */ | |
2620 | size_t m_max_search_results = SIZE_MAX; | |
2621 | ||
f97a63c5 AB |
2622 | /* Expand symtabs in OBJFILE that match PREG, are of type M_KIND. Return |
2623 | true if any msymbols were seen that we should later consider adding to | |
2624 | the results list. */ | |
2625 | bool expand_symtabs (objfile *objfile, | |
6b09f134 | 2626 | const std::optional<compiled_regex> &preg) const; |
f97a63c5 AB |
2627 | |
2628 | /* Add symbols from symtabs in OBJFILE that match PREG, and TREG, and are | |
c2512106 AB |
2629 | of type M_KIND, to the results set RESULTS_SET. Return false if we |
2630 | stop adding results early due to having already found too many results | |
2631 | (based on M_MAX_SEARCH_RESULTS limit), otherwise return true. | |
2632 | Returning true does not indicate that any results were added, just | |
2633 | that we didn't _not_ add a result due to reaching MAX_SEARCH_RESULTS. */ | |
2634 | bool add_matching_symbols (objfile *objfile, | |
6b09f134 LS |
2635 | const std::optional<compiled_regex> &preg, |
2636 | const std::optional<compiled_regex> &treg, | |
c2512106 AB |
2637 | std::set<symbol_search> *result_set) const; |
2638 | ||
2639 | /* Add msymbols from OBJFILE that match PREG and M_KIND, to the results | |
2640 | vector RESULTS. Return false if we stop adding results early due to | |
2641 | having already found too many results (based on max search results | |
2642 | limit M_MAX_SEARCH_RESULTS), otherwise return true. Returning true | |
2643 | does not indicate that any results were added, just that we didn't | |
2644 | _not_ add a result due to reaching MAX_SEARCH_RESULTS. */ | |
2645 | bool add_matching_msymbols (objfile *objfile, | |
6b09f134 | 2646 | const std::optional<compiled_regex> &preg, |
f97a63c5 AB |
2647 | std::vector<symbol_search> *results) const; |
2648 | ||
2649 | /* Return true if MSYMBOL is of type KIND. */ | |
2650 | static bool is_suitable_msymbol (const enum search_domain kind, | |
2651 | const minimal_symbol *msymbol); | |
470c0b1c | 2652 | }; |
165f8965 AB |
2653 | |
2654 | /* When searching for Fortran symbols within modules (functions/variables) | |
2655 | we return a vector of this type. The first item in the pair is the | |
2656 | module symbol, and the second item is the symbol for the function or | |
2657 | variable we found. */ | |
2658 | typedef std::pair<symbol_search, symbol_search> module_symbol_search; | |
2659 | ||
2660 | /* Searches the symbols to find function and variables symbols (depending | |
2661 | on KIND) within Fortran modules. The MODULE_REGEXP matches against the | |
2662 | name of the module, REGEXP matches against the name of the symbol within | |
2663 | the module, and TYPE_REGEXP matches against the type of the symbol | |
2664 | within the module. */ | |
2665 | extern std::vector<module_symbol_search> search_module_symbols | |
2666 | (const char *module_regexp, const char *regexp, | |
2667 | const char *type_regexp, search_domain kind); | |
2668 | ||
5f512a7d AB |
2669 | /* Convert a global or static symbol SYM (based on BLOCK, which should be |
2670 | either GLOBAL_BLOCK or STATIC_BLOCK) into a string for use in 'info' | |
2671 | type commands (e.g. 'info variables', 'info functions', etc). KIND is | |
2672 | the type of symbol that was searched for which gave us SYM. */ | |
2673 | ||
2674 | extern std::string symbol_to_info_string (struct symbol *sym, int block, | |
2675 | enum search_domain kind); | |
2676 | ||
12615cba PW |
2677 | extern bool treg_matches_sym_type_name (const compiled_regex &treg, |
2678 | const struct symbol *sym); | |
c906108c | 2679 | |
cd215b2e TT |
2680 | /* The name of the ``main'' function. */ |
2681 | extern const char *main_name (); | |
9e6c82ad | 2682 | extern enum language main_language (void); |
51cc5b07 | 2683 | |
442853af CB |
2684 | /* Lookup symbol NAME from DOMAIN in MAIN_OBJFILE's global or static blocks, |
2685 | as specified by BLOCK_INDEX. | |
cf901d3b DE |
2686 | This searches MAIN_OBJFILE as well as any associated separate debug info |
2687 | objfiles of MAIN_OBJFILE. | |
442853af | 2688 | BLOCK_INDEX can be GLOBAL_BLOCK or STATIC_BLOCK. |
d12307c1 | 2689 | Upon success fixes up the symbol's section if necessary. */ |
cf901d3b | 2690 | |
d12307c1 | 2691 | extern struct block_symbol |
efad9b6a | 2692 | lookup_global_symbol_from_objfile (struct objfile *main_objfile, |
442853af | 2693 | enum block_enum block_index, |
cf901d3b DE |
2694 | const char *name, |
2695 | const domain_enum domain); | |
3a40aaa0 | 2696 | |
a6c727b2 DJ |
2697 | /* Return 1 if the supplied producer string matches the ARM RealView |
2698 | compiler (armcc). */ | |
ececd218 | 2699 | bool producer_is_realview (const char *producer); |
3a40aaa0 | 2700 | |
db0fec5c | 2701 | extern unsigned int symtab_create_debug; |
45cfd468 | 2702 | |
2ab317fb SM |
2703 | /* Print a "symtab-create" debug statement. */ |
2704 | ||
2705 | #define symtab_create_debug_printf(fmt, ...) \ | |
2706 | debug_prefixed_printf_cond (symtab_create_debug >= 1, "symtab-create", fmt, ##__VA_ARGS__) | |
2707 | ||
2708 | /* Print a verbose "symtab-create" debug statement, only if | |
2709 | "set debug symtab-create" is set to 2 or higher. */ | |
2710 | ||
2711 | #define symtab_create_debug_printf_v(fmt, ...) \ | |
2712 | debug_prefixed_printf_cond (symtab_create_debug >= 2, "symtab-create", fmt, ##__VA_ARGS__) | |
2713 | ||
cc485e62 DE |
2714 | extern unsigned int symbol_lookup_debug; |
2715 | ||
2698da26 AB |
2716 | /* Return true if symbol-lookup debug is turned on at all. */ |
2717 | ||
2718 | static inline bool | |
2719 | symbol_lookup_debug_enabled () | |
2720 | { | |
2721 | return symbol_lookup_debug > 0; | |
2722 | } | |
2723 | ||
2724 | /* Return true if symbol-lookup debug is turned to verbose mode. */ | |
2725 | ||
2726 | static inline bool | |
2727 | symbol_lookup_debug_enabled_v () | |
2728 | { | |
2729 | return symbol_lookup_debug > 1; | |
2730 | } | |
2731 | ||
b1e678d9 AB |
2732 | /* Print a "symbol-lookup" debug statement if symbol_lookup_debug is >= 1. */ |
2733 | ||
2734 | #define symbol_lookup_debug_printf(fmt, ...) \ | |
2698da26 AB |
2735 | debug_prefixed_printf_cond (symbol_lookup_debug_enabled (), \ |
2736 | "symbol-lookup", fmt, ##__VA_ARGS__) | |
b1e678d9 AB |
2737 | |
2738 | /* Print a "symbol-lookup" debug statement if symbol_lookup_debug is >= 2. */ | |
2739 | ||
2740 | #define symbol_lookup_debug_printf_v(fmt, ...) \ | |
2698da26 AB |
2741 | debug_prefixed_printf_cond (symbol_lookup_debug_enabled_v (), \ |
2742 | "symbol-lookup", fmt, ##__VA_ARGS__) | |
2743 | ||
2744 | /* Print "symbol-lookup" enter/exit debug statements. */ | |
2745 | ||
2746 | #define SYMBOL_LOOKUP_SCOPED_DEBUG_ENTER_EXIT \ | |
2747 | scoped_debug_enter_exit (symbol_lookup_debug_enabled, "symbol-lookup") | |
b1e678d9 | 2748 | |
491144b5 | 2749 | extern bool basenames_may_differ; |
c011a4f4 | 2750 | |
ececd218 CB |
2751 | bool compare_filenames_for_search (const char *filename, |
2752 | const char *search_name); | |
4aac40c8 | 2753 | |
ececd218 CB |
2754 | bool compare_glob_filenames_for_search (const char *filename, |
2755 | const char *search_name); | |
cce0e923 | 2756 | |
14bc53a8 PA |
2757 | bool iterate_over_some_symtabs (const char *name, |
2758 | const char *real_path, | |
2759 | struct compunit_symtab *first, | |
2760 | struct compunit_symtab *after_last, | |
2761 | gdb::function_view<bool (symtab *)> callback); | |
f8eba3c6 TT |
2762 | |
2763 | void iterate_over_symtabs (const char *name, | |
14bc53a8 PA |
2764 | gdb::function_view<bool (symtab *)> callback); |
2765 | ||
f8eba3c6 | 2766 | |
67d89901 | 2767 | std::vector<CORE_ADDR> find_pcs_for_symtab_line |
977a0c16 | 2768 | (struct symtab *symtab, int line, const linetable_entry **best_entry); |
f8eba3c6 | 2769 | |
14bc53a8 PA |
2770 | /* Prototype for callbacks for LA_ITERATE_OVER_SYMBOLS. The callback |
2771 | is called once per matching symbol SYM. The callback should return | |
2772 | true to indicate that LA_ITERATE_OVER_SYMBOLS should continue | |
2773 | iterating, or false to indicate that the iteration should end. */ | |
8e704927 | 2774 | |
7e41c8db | 2775 | typedef bool (symbol_found_callback_ftype) (struct block_symbol *bsym); |
8e704927 | 2776 | |
6969f124 TT |
2777 | /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK. |
2778 | ||
2779 | For each symbol that matches, CALLBACK is called. The symbol is | |
2780 | passed to the callback. | |
2781 | ||
2782 | If CALLBACK returns false, the iteration ends and this function | |
2783 | returns false. Otherwise, the search continues, and the function | |
2784 | eventually returns true. */ | |
2785 | ||
2786 | bool iterate_over_symbols (const struct block *block, | |
b5ec771e | 2787 | const lookup_name_info &name, |
f8eba3c6 | 2788 | const domain_enum domain, |
14bc53a8 | 2789 | gdb::function_view<symbol_found_callback_ftype> callback); |
f8eba3c6 | 2790 | |
6a3dbf1b TT |
2791 | /* Like iterate_over_symbols, but if all calls to CALLBACK return |
2792 | true, then calls CALLBACK one additional time with a block_symbol | |
2793 | that has a valid block but a NULL symbol. */ | |
2794 | ||
2795 | bool iterate_over_symbols_terminated | |
2796 | (const struct block *block, | |
2797 | const lookup_name_info &name, | |
2798 | const domain_enum domain, | |
2799 | gdb::function_view<symbol_found_callback_ftype> callback); | |
2800 | ||
2f408ecb PA |
2801 | /* Storage type used by demangle_for_lookup. demangle_for_lookup |
2802 | either returns a const char * pointer that points to either of the | |
2803 | fields of this type, or a pointer to the input NAME. This is done | |
596dc4ad TT |
2804 | this way to avoid depending on the precise details of the storage |
2805 | for the string. */ | |
2f408ecb PA |
2806 | class demangle_result_storage |
2807 | { | |
2808 | public: | |
2809 | ||
596dc4ad TT |
2810 | /* Swap the malloc storage to STR, and return a pointer to the |
2811 | beginning of the new string. */ | |
2812 | const char *set_malloc_ptr (gdb::unique_xmalloc_ptr<char> &&str) | |
2f408ecb | 2813 | { |
596dc4ad TT |
2814 | m_malloc = std::move (str); |
2815 | return m_malloc.get (); | |
2f408ecb PA |
2816 | } |
2817 | ||
2818 | /* Set the malloc storage to now point at PTR. Any previous malloc | |
2819 | storage is released. */ | |
2820 | const char *set_malloc_ptr (char *ptr) | |
2821 | { | |
2822 | m_malloc.reset (ptr); | |
2823 | return ptr; | |
2824 | } | |
2825 | ||
2826 | private: | |
2827 | ||
2828 | /* The storage. */ | |
2f408ecb PA |
2829 | gdb::unique_xmalloc_ptr<char> m_malloc; |
2830 | }; | |
2831 | ||
2832 | const char * | |
2833 | demangle_for_lookup (const char *name, enum language lang, | |
2834 | demangle_result_storage &storage); | |
f8eba3c6 | 2835 | |
b5ec771e PA |
2836 | /* Test to see if the symbol of language SYMBOL_LANGUAGE specified by |
2837 | SYMNAME (which is already demangled for C++ symbols) matches | |
2838 | SYM_TEXT in the first SYM_TEXT_LEN characters. If so, add it to | |
e08bd6c5 PA |
2839 | the current completion list and return true. Otherwise, return |
2840 | false. */ | |
2841 | bool completion_list_add_name (completion_tracker &tracker, | |
b5ec771e PA |
2842 | language symbol_language, |
2843 | const char *symname, | |
2844 | const lookup_name_info &lookup_name, | |
b5ec771e PA |
2845 | const char *text, const char *word); |
2846 | ||
fcaad03c KS |
2847 | /* A simple symbol searching class. */ |
2848 | ||
2849 | class symbol_searcher | |
2850 | { | |
2851 | public: | |
2852 | /* Returns the symbols found for the search. */ | |
2853 | const std::vector<block_symbol> & | |
2854 | matching_symbols () const | |
2855 | { | |
2856 | return m_symbols; | |
2857 | } | |
2858 | ||
2859 | /* Returns the minimal symbols found for the search. */ | |
2860 | const std::vector<bound_minimal_symbol> & | |
2861 | matching_msymbols () const | |
2862 | { | |
2863 | return m_minimal_symbols; | |
2864 | } | |
2865 | ||
2866 | /* Search for all symbols named NAME in LANGUAGE with DOMAIN, restricting | |
2867 | search to FILE_SYMTABS and SEARCH_PSPACE, both of which may be NULL | |
2868 | to search all symtabs and program spaces. */ | |
2869 | void find_all_symbols (const std::string &name, | |
2870 | const struct language_defn *language, | |
2871 | enum search_domain search_domain, | |
2872 | std::vector<symtab *> *search_symtabs, | |
2873 | struct program_space *search_pspace); | |
2874 | ||
2875 | /* Reset this object to perform another search. */ | |
2876 | void reset () | |
2877 | { | |
2878 | m_symbols.clear (); | |
2879 | m_minimal_symbols.clear (); | |
2880 | } | |
2881 | ||
2882 | private: | |
2883 | /* Matching debug symbols. */ | |
2884 | std::vector<block_symbol> m_symbols; | |
2885 | ||
2886 | /* Matching non-debug symbols. */ | |
2887 | std::vector<bound_minimal_symbol> m_minimal_symbols; | |
2888 | }; | |
2889 | ||
0e350a05 AB |
2890 | /* Class used to encapsulate the filename filtering for the "info sources" |
2891 | command. */ | |
2892 | ||
2893 | struct info_sources_filter | |
2894 | { | |
2895 | /* If filename filtering is being used (see M_C_REGEXP) then which part | |
2896 | of the filename is being filtered against? */ | |
2897 | enum class match_on | |
2898 | { | |
2899 | /* Match against the full filename. */ | |
2900 | FULLNAME, | |
2901 | ||
2902 | /* Match only against the directory part of the full filename. */ | |
2903 | DIRNAME, | |
2904 | ||
2905 | /* Match only against the basename part of the full filename. */ | |
2906 | BASENAME | |
2907 | }; | |
2908 | ||
2909 | /* Create a filter of MATCH_TYPE using regular expression REGEXP. If | |
2910 | REGEXP is nullptr then all files will match the filter and MATCH_TYPE | |
2911 | is ignored. | |
2912 | ||
2913 | The string pointed too by REGEXP must remain live and unchanged for | |
2914 | this lifetime of this object as the object only retains a copy of the | |
2915 | pointer. */ | |
2916 | info_sources_filter (match_on match_type, const char *regexp); | |
2917 | ||
2918 | DISABLE_COPY_AND_ASSIGN (info_sources_filter); | |
2919 | ||
2920 | /* Does FULLNAME match the filter defined by this object, return true if | |
2921 | it does, otherwise, return false. If there is no filtering defined | |
2922 | then this function will always return true. */ | |
2923 | bool matches (const char *fullname) const; | |
2924 | ||
0e350a05 AB |
2925 | private: |
2926 | ||
2927 | /* The type of filtering in place. */ | |
2928 | match_on m_match_type; | |
2929 | ||
2930 | /* Points to the original regexp used to create this filter. */ | |
2931 | const char *m_regexp; | |
2932 | ||
2933 | /* A compiled version of M_REGEXP. This object is only given a value if | |
2934 | M_REGEXP is not nullptr and is not the empty string. */ | |
6b09f134 | 2935 | std::optional<compiled_regex> m_c_regexp; |
0e350a05 AB |
2936 | }; |
2937 | ||
2938 | /* Perform the core of the 'info sources' command. | |
2939 | ||
2940 | FILTER is used to perform regular expression based filtering on the | |
2941 | source files that will be displayed. | |
2942 | ||
2943 | Output is written to UIOUT in CLI or MI style as appropriate. */ | |
2944 | ||
2945 | extern void info_sources_worker (struct ui_out *uiout, | |
1fb1ce02 | 2946 | bool group_by_objfile, |
0e350a05 AB |
2947 | const info_sources_filter &filter); |
2948 | ||
528b729b GL |
2949 | /* This function returns the address at which the function epilogue begins, |
2950 | according to the linetable. | |
2951 | ||
2952 | Returns an empty optional if EPILOGUE_BEGIN is never set in the | |
2953 | linetable. */ | |
2954 | ||
2955 | std::optional<CORE_ADDR> find_epilogue_using_linetable (CORE_ADDR func_addr); | |
2956 | ||
c906108c | 2957 | #endif /* !defined(SYMTAB_H) */ |