1 /* Symbol table definitions for GDB.
3 Copyright (C) 1986-2022 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #if !defined (SYMTAB_H)
27 #include "gdbsupport/gdb_vecs.h"
29 #include "gdbsupport/gdb_obstack.h"
30 #include "gdbsupport/gdb_regex.h"
31 #include "gdbsupport/enum-flags.h"
32 #include "gdbsupport/function-view.h"
33 #include "gdbsupport/gdb_optional.h"
34 #include "gdbsupport/gdb_string_view.h"
35 #include "gdbsupport/next-iterator.h"
36 #include "gdbsupport/iterator-range.h"
37 #include "completer.h"
38 #include "gdb-demangle.h"
40 /* Opaque declarations. */
54 struct cmd_list_element
;
56 struct lookup_name_info
;
58 /* How to match a lookup name against a symbol search name. */
59 enum class symbol_name_match_type
61 /* Wild matching. Matches unqualified symbol names in all
62 namespace/module/packages, etc. */
65 /* Full matching. The lookup name indicates a fully-qualified name,
66 and only matches symbol search names in the specified
67 namespace/module/package. */
70 /* Search name matching. This is like FULL, but the search name did
71 not come from the user; instead it is already a search name
72 retrieved from a search_name () call.
73 For Ada, this avoids re-encoding an already-encoded search name
74 (which would potentially incorrectly lowercase letters in the
75 linkage/search name that should remain uppercase). For C++, it
76 avoids trying to demangle a name we already know is
80 /* Expression matching. The same as FULL matching in most
81 languages. The same as WILD matching in Ada. */
85 /* Hash the given symbol search name according to LANGUAGE's
87 extern unsigned int search_name_hash (enum language language
,
88 const char *search_name
);
90 /* Ada-specific bits of a lookup_name_info object. This is lazily
91 constructed on demand. */
93 class ada_lookup_name_info final
97 explicit ada_lookup_name_info (const lookup_name_info
&lookup_name
);
99 /* Compare SYMBOL_SEARCH_NAME with our lookup name, using MATCH_TYPE
100 as name match type. Returns true if there's a match, false
101 otherwise. If non-NULL, store the matching results in MATCH. */
102 bool matches (const char *symbol_search_name
,
103 symbol_name_match_type match_type
,
104 completion_match_result
*comp_match_res
) const;
106 /* The Ada-encoded lookup name. */
107 const std::string
&lookup_name () const
108 { return m_encoded_name
; }
110 /* Return true if we're supposed to be doing a wild match look
112 bool wild_match_p () const
113 { return m_wild_match_p
; }
115 /* Return true if we're looking up a name inside package
117 bool standard_p () const
118 { return m_standard_p
; }
120 /* Return true if doing a verbatim match. */
121 bool verbatim_p () const
122 { return m_verbatim_p
; }
125 /* The Ada-encoded lookup name. */
126 std::string m_encoded_name
;
128 /* Whether the user-provided lookup name was Ada encoded. If so,
129 then return encoded names in the 'matches' method's 'completion
130 match result' output. */
131 bool m_encoded_p
: 1;
133 /* True if really doing wild matching. Even if the user requests
134 wild matching, some cases require full matching. */
135 bool m_wild_match_p
: 1;
137 /* True if doing a verbatim match. This is true if the decoded
138 version of the symbol name is wrapped in '<'/'>'. This is an
139 escape hatch users can use to look up symbols the Ada encoding
140 does not understand. */
141 bool m_verbatim_p
: 1;
143 /* True if the user specified a symbol name that is inside package
144 Standard. Symbol names inside package Standard are handled
145 specially. We always do a non-wild match of the symbol name
146 without the "standard__" prefix, and only search static and
147 global symbols. This was primarily introduced in order to allow
148 the user to specifically access the standard exceptions using,
149 for instance, Standard.Constraint_Error when Constraint_Error is
150 ambiguous (due to the user defining its own Constraint_Error
151 entity inside its program). */
152 bool m_standard_p
: 1;
155 /* Language-specific bits of a lookup_name_info object, for languages
156 that do name searching using demangled names (C++/D/Go). This is
157 lazily constructed on demand. */
159 struct demangle_for_lookup_info final
162 demangle_for_lookup_info (const lookup_name_info
&lookup_name
,
165 /* The demangled lookup name. */
166 const std::string
&lookup_name () const
167 { return m_demangled_name
; }
170 /* The demangled lookup name. */
171 std::string m_demangled_name
;
174 /* Object that aggregates all information related to a symbol lookup
175 name. I.e., the name that is matched against the symbol's search
176 name. Caches per-language information so that it doesn't require
177 recomputing it for every symbol comparison, like for example the
178 Ada encoded name and the symbol's name hash for a given language.
179 The object is conceptually immutable once constructed, and thus has
180 no setters. This is to prevent some code path from tweaking some
181 property of the lookup name for some local reason and accidentally
182 altering the results of any continuing search(es).
183 lookup_name_info objects are generally passed around as a const
184 reference to reinforce that. (They're not passed around by value
185 because they're not small.) */
186 class lookup_name_info final
189 /* We delete this overload so that the callers are required to
190 explicitly handle the lifetime of the name. */
191 lookup_name_info (std::string
&&name
,
192 symbol_name_match_type match_type
,
193 bool completion_mode
= false,
194 bool ignore_parameters
= false) = delete;
196 /* This overload requires that NAME have a lifetime at least as long
197 as the lifetime of this object. */
198 lookup_name_info (const std::string
&name
,
199 symbol_name_match_type match_type
,
200 bool completion_mode
= false,
201 bool ignore_parameters
= false)
202 : m_match_type (match_type
),
203 m_completion_mode (completion_mode
),
204 m_ignore_parameters (ignore_parameters
),
208 /* This overload requires that NAME have a lifetime at least as long
209 as the lifetime of this object. */
210 lookup_name_info (const char *name
,
211 symbol_name_match_type match_type
,
212 bool completion_mode
= false,
213 bool ignore_parameters
= false)
214 : m_match_type (match_type
),
215 m_completion_mode (completion_mode
),
216 m_ignore_parameters (ignore_parameters
),
220 /* Getters. See description of each corresponding field. */
221 symbol_name_match_type
match_type () const { return m_match_type
; }
222 bool completion_mode () const { return m_completion_mode
; }
223 gdb::string_view
name () const { return m_name
; }
224 const bool ignore_parameters () const { return m_ignore_parameters
; }
226 /* Like the "name" method but guarantees that the returned string is
228 const char *c_str () const
230 /* Actually this is always guaranteed due to how the class is
232 return m_name
.data ();
235 /* Return a version of this lookup name that is usable with
236 comparisons against symbols have no parameter info, such as
237 psymbols and GDB index symbols. */
238 lookup_name_info
make_ignore_params () const
240 return lookup_name_info (c_str (), m_match_type
, m_completion_mode
,
241 true /* ignore params */);
244 /* Get the search name hash for searches in language LANG. */
245 unsigned int search_name_hash (language lang
) const
247 /* Only compute each language's hash once. */
248 if (!m_demangled_hashes_p
[lang
])
250 m_demangled_hashes
[lang
]
251 = ::search_name_hash (lang
, language_lookup_name (lang
));
252 m_demangled_hashes_p
[lang
] = true;
254 return m_demangled_hashes
[lang
];
257 /* Get the search name for searches in language LANG. */
258 const char *language_lookup_name (language lang
) const
263 return ada ().lookup_name ().c_str ();
265 return cplus ().lookup_name ().c_str ();
267 return d ().lookup_name ().c_str ();
269 return go ().lookup_name ().c_str ();
271 return m_name
.data ();
275 /* Get the Ada-specific lookup info. */
276 const ada_lookup_name_info
&ada () const
282 /* Get the C++-specific lookup info. */
283 const demangle_for_lookup_info
&cplus () const
285 maybe_init (m_cplus
, language_cplus
);
289 /* Get the D-specific lookup info. */
290 const demangle_for_lookup_info
&d () const
292 maybe_init (m_d
, language_d
);
296 /* Get the Go-specific lookup info. */
297 const demangle_for_lookup_info
&go () const
299 maybe_init (m_go
, language_go
);
303 /* Get a reference to a lookup_name_info object that matches any
305 static const lookup_name_info
&match_any ();
308 /* Initialize FIELD, if not initialized yet. */
309 template<typename Field
, typename
... Args
>
310 void maybe_init (Field
&field
, Args
&&... args
) const
313 field
.emplace (*this, std::forward
<Args
> (args
)...);
316 /* The lookup info as passed to the ctor. */
317 symbol_name_match_type m_match_type
;
318 bool m_completion_mode
;
319 bool m_ignore_parameters
;
320 gdb::string_view m_name
;
322 /* Language-specific info. These fields are filled lazily the first
323 time a lookup is done in the corresponding language. They're
324 mutable because lookup_name_info objects are typically passed
325 around by const reference (see intro), and they're conceptually
326 "cache" that can always be reconstructed from the non-mutable
328 mutable gdb::optional
<ada_lookup_name_info
> m_ada
;
329 mutable gdb::optional
<demangle_for_lookup_info
> m_cplus
;
330 mutable gdb::optional
<demangle_for_lookup_info
> m_d
;
331 mutable gdb::optional
<demangle_for_lookup_info
> m_go
;
333 /* The demangled hashes. Stored in an array with one entry for each
334 possible language. The second array records whether we've
335 already computed the each language's hash. (These are separate
336 arrays instead of a single array of optional<unsigned> to avoid
337 alignment padding). */
338 mutable std::array
<unsigned int, nr_languages
> m_demangled_hashes
;
339 mutable std::array
<bool, nr_languages
> m_demangled_hashes_p
{};
342 /* Comparison function for completion symbol lookup.
344 Returns true if the symbol name matches against LOOKUP_NAME.
346 SYMBOL_SEARCH_NAME should be a symbol's "search" name.
348 On success and if non-NULL, COMP_MATCH_RES->match is set to point
349 to the symbol name as should be presented to the user as a
350 completion match list element. In most languages, this is the same
351 as the symbol's search name, but in some, like Ada, the display
352 name is dynamically computed within the comparison routine.
354 Also, on success and if non-NULL, COMP_MATCH_RES->match_for_lcd
355 points the part of SYMBOL_SEARCH_NAME that was considered to match
356 LOOKUP_NAME. E.g., in C++, in linespec/wild mode, if the symbol is
357 "foo::function()" and LOOKUP_NAME is "function(", MATCH_FOR_LCD
358 points to "function()" inside SYMBOL_SEARCH_NAME. */
359 typedef bool (symbol_name_matcher_ftype
)
360 (const char *symbol_search_name
,
361 const lookup_name_info
&lookup_name
,
362 completion_match_result
*comp_match_res
);
364 /* Some of the structures in this file are space critical.
365 The space-critical structures are:
367 struct general_symbol_info
369 struct partial_symbol
371 These structures are laid out to encourage good packing.
372 They use ENUM_BITFIELD and short int fields, and they order the
373 structure members so that fields less than a word are next
374 to each other so they can be packed together. */
376 /* Rearranged: used ENUM_BITFIELD and rearranged field order in
377 all the space critical structures (plus struct minimal_symbol).
378 Memory usage dropped from 99360768 bytes to 90001408 bytes.
379 I measured this with before-and-after tests of
380 "HEAD-old-gdb -readnow HEAD-old-gdb" and
381 "HEAD-new-gdb -readnow HEAD-old-gdb" on native i686-pc-linux-gnu,
382 red hat linux 8, with LD_LIBRARY_PATH=/usr/lib/debug,
383 typing "maint space 1" at the first command prompt.
385 Here is another measurement (from andrew c):
386 # no /usr/lib/debug, just plain glibc, like a normal user
388 (gdb) break internal_error
390 (gdb) maint internal-error
394 gdb gdb_6_0_branch 2003-08-19 space used: 8896512
395 gdb HEAD 2003-08-19 space used: 8904704
396 gdb HEAD 2003-08-21 space used: 8396800 (+symtab.h)
397 gdb HEAD 2003-08-21 space used: 8265728 (+gdbtypes.h)
399 The third line shows the savings from the optimizations in symtab.h.
400 The fourth line shows the savings from the optimizations in
401 gdbtypes.h. Both optimizations are in gdb HEAD now.
403 --chastain 2003-08-21 */
405 /* Define a structure for the information that is common to all symbol types,
406 including minimal symbols, partial symbols, and full symbols. In a
407 multilanguage environment, some language specific information may need to
408 be recorded along with each symbol. */
410 /* This structure is space critical. See space comments at the top. */
412 struct general_symbol_info
414 /* Short version as to when to use which name accessor:
415 Use natural_name () to refer to the name of the symbol in the original
416 source code. Use linkage_name () if you want to know what the linker
417 thinks the symbol's name is. Use print_name () for output. Use
418 demangled_name () if you specifically need to know whether natural_name ()
419 and linkage_name () are different. */
421 const char *linkage_name () const
424 /* Return SYMBOL's "natural" name, i.e. the name that it was called in
425 the original source code. In languages like C++ where symbols may
426 be mangled for ease of manipulation by the linker, this is the
428 const char *natural_name () const;
430 /* Returns a version of the name of a symbol that is
431 suitable for output. In C++ this is the "demangled" form of the
432 name if demangle is on and the "mangled" form of the name if
433 demangle is off. In other languages this is just the symbol name.
434 The result should never be NULL. Don't use this for internal
435 purposes (e.g. storing in a hashtable): it's only suitable for output. */
436 const char *print_name () const
437 { return demangle
? natural_name () : linkage_name (); }
439 /* Return the demangled name for a symbol based on the language for
440 that symbol. If no demangled name exists, return NULL. */
441 const char *demangled_name () const;
443 /* Returns the name to be used when sorting and searching symbols.
444 In C++, we search for the demangled form of a name,
445 and so sort symbols accordingly. In Ada, however, we search by mangled
446 name. If there is no distinct demangled name, then this
447 returns the same value (same pointer) as linkage_name (). */
448 const char *search_name () const;
450 /* Set just the linkage name of a symbol; do not try to demangle
451 it. Used for constructs which do not have a mangled name,
452 e.g. struct tags. Unlike compute_and_set_names, linkage_name must
453 be terminated and either already on the objfile's obstack or
454 permanently allocated. */
455 void set_linkage_name (const char *linkage_name
)
456 { m_name
= linkage_name
; }
458 /* Set the demangled name of this symbol to NAME. NAME must be
459 already correctly allocated. If the symbol's language is Ada,
460 then the name is ignored and the obstack is set. */
461 void set_demangled_name (const char *name
, struct obstack
*obstack
);
463 enum language
language () const
464 { return m_language
; }
466 /* Initializes the language dependent portion of a symbol
467 depending upon the language for the symbol. */
468 void set_language (enum language language
, struct obstack
*obstack
);
470 /* Set the linkage and natural names of a symbol, by demangling
471 the linkage name. If linkage_name may not be nullterminated,
472 copy_name must be set to true. */
473 void compute_and_set_names (gdb::string_view linkage_name
, bool copy_name
,
474 struct objfile_per_bfd_storage
*per_bfd
,
475 gdb::optional
<hashval_t
> hash
476 = gdb::optional
<hashval_t
> ());
478 /* Name of the symbol. This is a required field. Storage for the
479 name is allocated on the objfile_obstack for the associated
480 objfile. For languages like C++ that make a distinction between
481 the mangled name and demangled name, this is the mangled
486 /* Value of the symbol. Which member of this union to use, and what
487 it means, depends on what kind of symbol this is and its
488 SYMBOL_CLASS. See comments there for more details. All of these
489 are in host byte order (though what they point to might be in
490 target byte order, e.g. LOC_CONST_BYTES). */
496 const struct block
*block
;
498 const gdb_byte
*bytes
;
502 /* A common block. Used with LOC_COMMON_BLOCK. */
504 const struct common_block
*common_block
;
506 /* For opaque typedef struct chain. */
508 struct symbol
*chain
;
512 /* Since one and only one language can apply, wrap the language specific
513 information inside a union. */
517 /* A pointer to an obstack that can be used for storage associated
518 with this symbol. This is only used by Ada, and only when the
519 'ada_mangled' field is zero. */
520 struct obstack
*obstack
;
522 /* This is used by languages which wish to store a demangled name.
523 currently used by Ada, C++, and Objective C. */
524 const char *demangled_name
;
528 /* Record the source code language that applies to this symbol.
529 This is used to select one of the fields from the language specific
532 ENUM_BITFIELD(language
) m_language
: LANGUAGE_BITS
;
534 /* This is only used by Ada. If set, then the 'demangled_name' field
535 of language_specific is valid. Otherwise, the 'obstack' field is
537 unsigned int ada_mangled
: 1;
539 /* Which section is this symbol in? This is an index into
540 section_offsets for this objfile. Negative means that the symbol
541 does not get relocated relative to a section. */
545 /* Set the index into the obj_section list (within the containing
546 objfile) for the section that contains this symbol. See M_SECTION
549 void set_section_index (short idx
)
552 /* Return the index into the obj_section list (within the containing
553 objfile) for the section that contains this symbol. See M_SECTION
556 short section_index () const
557 { return m_section
; }
559 /* Return the obj_section from OBJFILE for this symbol. The symbol
560 returned is based on the SECTION member variable, and can be nullptr
561 if SECTION is negative. */
563 struct obj_section
*obj_section (const struct objfile
*objfile
) const;
566 extern CORE_ADDR
symbol_overlayed_address (CORE_ADDR
, struct obj_section
*);
568 /* Return the address of SYM. The MAYBE_COPIED flag must be set on
569 SYM. If SYM appears in the main program's minimal symbols, then
570 that minsym's address is returned; otherwise, SYM's address is
571 returned. This should generally only be used via the
572 SYMBOL_VALUE_ADDRESS macro. */
574 extern CORE_ADDR
get_symbol_address (const struct symbol
*sym
);
576 /* Note that these macros only work with symbol, not partial_symbol. */
578 #define SYMBOL_VALUE(symbol) (symbol)->value.ivalue
579 #define SYMBOL_VALUE_ADDRESS(symbol) \
580 (((symbol)->maybe_copied) ? get_symbol_address (symbol) \
581 : ((symbol)->value.address))
582 #define SET_SYMBOL_VALUE_ADDRESS(symbol, new_value) \
583 ((symbol)->value.address = (new_value))
584 #define SYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes
585 #define SYMBOL_VALUE_COMMON_BLOCK(symbol) (symbol)->value.common_block
586 #define SYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block
587 #define SYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain
589 /* Try to determine the demangled name for a symbol, based on the
590 language of that symbol. If the language is set to language_auto,
591 it will attempt to find any demangling algorithm that works and
592 then set the language appropriately. The returned name is allocated
593 by the demangler and should be xfree'd. */
595 extern gdb::unique_xmalloc_ptr
<char> symbol_find_demangled_name
596 (struct general_symbol_info
*gsymbol
, const char *mangled
);
598 /* Return true if NAME matches the "search" name of GSYMBOL, according
599 to the symbol's language. */
600 extern bool symbol_matches_search_name
601 (const struct general_symbol_info
*gsymbol
,
602 const lookup_name_info
&name
);
604 /* Compute the hash of the given symbol search name of a symbol of
605 language LANGUAGE. */
606 extern unsigned int search_name_hash (enum language language
,
607 const char *search_name
);
609 /* Classification types for a minimal symbol. These should be taken as
610 "advisory only", since if gdb can't easily figure out a
611 classification it simply selects mst_unknown. It may also have to
612 guess when it can't figure out which is a better match between two
613 types (mst_data versus mst_bss) for example. Since the minimal
614 symbol info is sometimes derived from the BFD library's view of a
615 file, we need to live with what information bfd supplies. */
617 enum minimal_symbol_type
619 mst_unknown
= 0, /* Unknown type, the default */
620 mst_text
, /* Generally executable instructions */
622 /* A GNU ifunc symbol, in the .text section. GDB uses to know
623 whether the user is setting a breakpoint on a GNU ifunc function,
624 and thus GDB needs to actually set the breakpoint on the target
625 function. It is also used to know whether the program stepped
626 into an ifunc resolver -- the resolver may get a separate
627 symbol/alias under a different name, but it'll have the same
628 address as the ifunc symbol. */
629 mst_text_gnu_ifunc
, /* Executable code returning address
630 of executable code */
632 /* A GNU ifunc function descriptor symbol, in a data section
633 (typically ".opd"). Seen on architectures that use function
634 descriptors, like PPC64/ELFv1. In this case, this symbol's value
635 is the address of the descriptor. There'll be a corresponding
636 mst_text_gnu_ifunc synthetic symbol for the text/entry
638 mst_data_gnu_ifunc
, /* Executable code returning address
639 of executable code */
641 mst_slot_got_plt
, /* GOT entries for .plt sections */
642 mst_data
, /* Generally initialized data */
643 mst_bss
, /* Generally uninitialized data */
644 mst_abs
, /* Generally absolute (nonrelocatable) */
645 /* GDB uses mst_solib_trampoline for the start address of a shared
646 library trampoline entry. Breakpoints for shared library functions
647 are put there if the shared library is not yet loaded.
648 After the shared library is loaded, lookup_minimal_symbol will
649 prefer the minimal symbol from the shared library (usually
650 a mst_text symbol) over the mst_solib_trampoline symbol, and the
651 breakpoints will be moved to their true address in the shared
652 library via breakpoint_re_set. */
653 mst_solib_trampoline
, /* Shared library trampoline code */
654 /* For the mst_file* types, the names are only guaranteed to be unique
655 within a given .o file. */
656 mst_file_text
, /* Static version of mst_text */
657 mst_file_data
, /* Static version of mst_data */
658 mst_file_bss
, /* Static version of mst_bss */
662 /* The number of enum minimal_symbol_type values, with some padding for
663 reasonable growth. */
664 #define MINSYM_TYPE_BITS 4
665 gdb_static_assert (nr_minsym_types
<= (1 << MINSYM_TYPE_BITS
));
667 /* Define a simple structure used to hold some very basic information about
668 all defined global symbols (text, data, bss, abs, etc). The only required
669 information is the general_symbol_info.
671 In many cases, even if a file was compiled with no special options for
672 debugging at all, as long as was not stripped it will contain sufficient
673 information to build a useful minimal symbol table using this structure.
674 Even when a file contains enough debugging information to build a full
675 symbol table, these minimal symbols are still useful for quickly mapping
676 between names and addresses, and vice versa. They are also sometimes
677 used to figure out what full symbol table entries need to be read in. */
679 struct minimal_symbol
: public general_symbol_info
681 /* Size of this symbol. dbx_end_psymtab in dbxread.c uses this
682 information to calculate the end of the partial symtab based on the
683 address of the last symbol plus the size of the last symbol. */
687 /* Which source file is this symbol in? Only relevant for mst_file_*. */
688 const char *filename
;
690 /* Classification type for this minimal symbol. */
692 ENUM_BITFIELD(minimal_symbol_type
) type
: MINSYM_TYPE_BITS
;
694 /* Non-zero if this symbol was created by gdb.
695 Such symbols do not appear in the output of "info var|fun". */
696 unsigned int created_by_gdb
: 1;
698 /* Two flag bits provided for the use of the target. */
699 unsigned int target_flag_1
: 1;
700 unsigned int target_flag_2
: 1;
702 /* Nonzero iff the size of the minimal symbol has been set.
703 Symbol size information can sometimes not be determined, because
704 the object file format may not carry that piece of information. */
705 unsigned int has_size
: 1;
707 /* For data symbols only, if this is set, then the symbol might be
708 subject to copy relocation. In this case, a minimal symbol
709 matching the symbol's linkage name is first looked for in the
710 main objfile. If found, then that address is used; otherwise the
711 address in this symbol is used. */
713 unsigned maybe_copied
: 1;
715 /* Non-zero if this symbol ever had its demangled name set (even if
716 it was set to NULL). */
717 unsigned int name_set
: 1;
719 /* Minimal symbols with the same hash key are kept on a linked
720 list. This is the link. */
722 struct minimal_symbol
*hash_next
;
724 /* Minimal symbols are stored in two different hash tables. This is
725 the `next' pointer for the demangled hash table. */
727 struct minimal_symbol
*demangled_hash_next
;
729 /* True if this symbol is of some data type. */
731 bool data_p () const;
733 /* True if MSYMBOL is of some text type. */
735 bool text_p () const;
738 /* Return the address of MINSYM, which comes from OBJF. The
739 MAYBE_COPIED flag must be set on MINSYM. If MINSYM appears in the
740 main program's minimal symbols, then that minsym's address is
741 returned; otherwise, MINSYM's address is returned. This should
742 generally only be used via the MSYMBOL_VALUE_ADDRESS macro. */
744 extern CORE_ADDR
get_msymbol_address (struct objfile
*objf
,
745 const struct minimal_symbol
*minsym
);
747 #define MSYMBOL_TARGET_FLAG_1(msymbol) (msymbol)->target_flag_1
748 #define MSYMBOL_TARGET_FLAG_2(msymbol) (msymbol)->target_flag_2
749 #define MSYMBOL_SIZE(msymbol) ((msymbol)->size + 0)
750 #define SET_MSYMBOL_SIZE(msymbol, sz) \
753 (msymbol)->size = sz; \
754 (msymbol)->has_size = 1; \
756 #define MSYMBOL_HAS_SIZE(msymbol) ((msymbol)->has_size + 0)
757 #define MSYMBOL_TYPE(msymbol) (msymbol)->type
759 #define MSYMBOL_VALUE(symbol) (symbol)->value.ivalue
760 /* The unrelocated address of the minimal symbol. */
761 #define MSYMBOL_VALUE_RAW_ADDRESS(symbol) ((symbol)->value.address + 0)
762 /* The relocated address of the minimal symbol, using the section
763 offsets from OBJFILE. */
764 #define MSYMBOL_VALUE_ADDRESS(objfile, symbol) \
765 (((symbol)->maybe_copied) ? get_msymbol_address (objfile, symbol) \
766 : ((symbol)->value.address \
767 + (objfile)->section_offsets[(symbol)->section_index ()]))
768 /* For a bound minsym, we can easily compute the address directly. */
769 #define BMSYMBOL_VALUE_ADDRESS(symbol) \
770 MSYMBOL_VALUE_ADDRESS ((symbol).objfile, (symbol).minsym)
771 #define SET_MSYMBOL_VALUE_ADDRESS(symbol, new_value) \
772 ((symbol)->value.address = (new_value))
773 #define MSYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes
774 #define MSYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block
775 #define MSYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain
781 /* Represent one symbol name; a variable, constant, function or typedef. */
783 /* Different name domains for symbols. Looking up a symbol specifies a
784 domain and ignores symbol definitions in other name domains. */
786 typedef enum domain_enum_tag
788 /* UNDEF_DOMAIN is used when a domain has not been discovered or
789 none of the following apply. This usually indicates an error either
790 in the symbol information or in gdb's handling of symbols. */
794 /* VAR_DOMAIN is the usual domain. In C, this contains variables,
795 function names, typedef names and enum type values. */
799 /* STRUCT_DOMAIN is used in C to hold struct, union and enum type names.
800 Thus, if `struct foo' is used in a C program, it produces a symbol named
801 `foo' in the STRUCT_DOMAIN. */
805 /* MODULE_DOMAIN is used in Fortran to hold module type names. */
809 /* LABEL_DOMAIN may be used for names of labels (for gotos). */
813 /* Fortran common blocks. Their naming must be separate from VAR_DOMAIN.
814 They also always use LOC_COMMON_BLOCK. */
817 /* This must remain last. */
821 /* The number of bits in a symbol used to represent the domain. */
823 #define SYMBOL_DOMAIN_BITS 3
824 gdb_static_assert (NR_DOMAINS
<= (1 << SYMBOL_DOMAIN_BITS
));
826 extern const char *domain_name (domain_enum
);
828 /* Searching domains, used when searching for symbols. Element numbers are
829 hardcoded in GDB, check all enum uses before changing it. */
833 /* Everything in VAR_DOMAIN minus FUNCTIONS_DOMAIN and
835 VARIABLES_DOMAIN
= 0,
837 /* All functions -- for some reason not methods, though. */
838 FUNCTIONS_DOMAIN
= 1,
840 /* All defined types */
850 extern const char *search_domain_name (enum search_domain
);
852 /* An address-class says where to find the value of a symbol. */
856 /* Not used; catches errors. */
860 /* Value is constant int SYMBOL_VALUE, host byteorder. */
864 /* Value is at fixed address SYMBOL_VALUE_ADDRESS. */
868 /* Value is in register. SYMBOL_VALUE is the register number
869 in the original debug format. SYMBOL_REGISTER_OPS holds a
870 function that can be called to transform this into the
871 actual register number this represents in a specific target
872 architecture (gdbarch).
874 For some symbol formats (stabs, for some compilers at least),
875 the compiler generates two symbols, an argument and a register.
876 In some cases we combine them to a single LOC_REGISTER in symbol
877 reading, but currently not for all cases (e.g. it's passed on the
878 stack and then loaded into a register). */
882 /* It's an argument; the value is at SYMBOL_VALUE offset in arglist. */
886 /* Value address is at SYMBOL_VALUE offset in arglist. */
890 /* Value is in specified register. Just like LOC_REGISTER except the
891 register holds the address of the argument instead of the argument
892 itself. This is currently used for the passing of structs and unions
893 on sparc and hppa. It is also used for call by reference where the
894 address is in a register, at least by mipsread.c. */
898 /* Value is a local variable at SYMBOL_VALUE offset in stack frame. */
902 /* Value not used; definition in SYMBOL_TYPE. Symbols in the domain
903 STRUCT_DOMAIN all have this class. */
907 /* Value is address SYMBOL_VALUE_ADDRESS in the code. */
911 /* In a symbol table, value is SYMBOL_BLOCK_VALUE of a `struct block'.
912 In a partial symbol table, SYMBOL_VALUE_ADDRESS is the start address
913 of the block. Function names have this class. */
917 /* Value is a constant byte-sequence pointed to by SYMBOL_VALUE_BYTES, in
918 target byte order. */
922 /* Value is at fixed address, but the address of the variable has
923 to be determined from the minimal symbol table whenever the
924 variable is referenced.
925 This happens if debugging information for a global symbol is
926 emitted and the corresponding minimal symbol is defined
927 in another object file or runtime common storage.
928 The linker might even remove the minimal symbol if the global
929 symbol is never referenced, in which case the symbol remains
932 GDB would normally find the symbol in the minimal symbol table if it will
933 not find it in the full symbol table. But a reference to an external
934 symbol in a local block shadowing other definition requires full symbol
935 without possibly having its address available for LOC_STATIC. Testcase
936 is provided as `gdb.dwarf2/dw2-unresolved.exp'.
938 This is also used for thread local storage (TLS) variables. In this case,
939 the address of the TLS variable must be determined when the variable is
940 referenced, from the MSYMBOL_VALUE_RAW_ADDRESS, which is the offset
941 of the TLS variable in the thread local storage of the shared
946 /* The variable does not actually exist in the program.
947 The value is ignored. */
951 /* The variable's address is computed by a set of location
952 functions (see "struct symbol_computed_ops" below). */
955 /* The variable uses general_symbol_info->value->common_block field.
956 It also always uses COMMON_BLOCK_DOMAIN. */
959 /* Not used, just notes the boundary of the enum. */
963 /* The number of bits needed for values in enum address_class, with some
964 padding for reasonable growth, and room for run-time registered address
965 classes. See symtab.c:MAX_SYMBOL_IMPLS.
966 This is a #define so that we can have a assertion elsewhere to
967 verify that we have reserved enough space for synthetic address
969 #define SYMBOL_ACLASS_BITS 5
970 gdb_static_assert (LOC_FINAL_VALUE
<= (1 << SYMBOL_ACLASS_BITS
));
972 /* The methods needed to implement LOC_COMPUTED. These methods can
973 use the symbol's .aux_value for additional per-symbol information.
975 At present this is only used to implement location expressions. */
977 struct symbol_computed_ops
980 /* Return the value of the variable SYMBOL, relative to the stack
981 frame FRAME. If the variable has been optimized out, return
984 Iff `read_needs_frame (SYMBOL)' is not SYMBOL_NEEDS_FRAME, then
985 FRAME may be zero. */
987 struct value
*(*read_variable
) (struct symbol
* symbol
,
988 struct frame_info
* frame
);
990 /* Read variable SYMBOL like read_variable at (callee) FRAME's function
991 entry. SYMBOL should be a function parameter, otherwise
992 NO_ENTRY_VALUE_ERROR will be thrown. */
993 struct value
*(*read_variable_at_entry
) (struct symbol
*symbol
,
994 struct frame_info
*frame
);
996 /* Find the "symbol_needs_kind" value for the given symbol. This
997 value determines whether reading the symbol needs memory (e.g., a
998 global variable), just registers (a thread-local), or a frame (a
1000 enum symbol_needs_kind (*get_symbol_read_needs
) (struct symbol
* symbol
);
1002 /* Write to STREAM a natural-language description of the location of
1003 SYMBOL, in the context of ADDR. */
1004 void (*describe_location
) (struct symbol
* symbol
, CORE_ADDR addr
,
1005 struct ui_file
* stream
);
1007 /* Non-zero if this symbol's address computation is dependent on PC. */
1008 unsigned char location_has_loclist
;
1010 /* Tracepoint support. Append bytecodes to the tracepoint agent
1011 expression AX that push the address of the object SYMBOL. Set
1012 VALUE appropriately. Note --- for objects in registers, this
1013 needn't emit any code; as long as it sets VALUE properly, then
1014 the caller will generate the right code in the process of
1015 treating this as an lvalue or rvalue. */
1017 void (*tracepoint_var_ref
) (struct symbol
*symbol
, struct agent_expr
*ax
,
1018 struct axs_value
*value
);
1020 /* Generate C code to compute the location of SYMBOL. The C code is
1021 emitted to STREAM. GDBARCH is the current architecture and PC is
1022 the PC at which SYMBOL's location should be evaluated.
1023 REGISTERS_USED is a vector indexed by register number; the
1024 generator function should set an element in this vector if the
1025 corresponding register is needed by the location computation.
1026 The generated C code must assign the location to a local
1027 variable; this variable's name is RESULT_NAME. */
1029 void (*generate_c_location
) (struct symbol
*symbol
, string_file
*stream
,
1030 struct gdbarch
*gdbarch
,
1031 std::vector
<bool> ®isters_used
,
1032 CORE_ADDR pc
, const char *result_name
);
1036 /* The methods needed to implement LOC_BLOCK for inferior functions.
1037 These methods can use the symbol's .aux_value for additional
1038 per-symbol information. */
1040 struct symbol_block_ops
1042 /* Fill in *START and *LENGTH with DWARF block data of function
1043 FRAMEFUNC valid for inferior context address PC. Set *LENGTH to
1044 zero if such location is not valid for PC; *START is left
1045 uninitialized in such case. */
1046 void (*find_frame_base_location
) (struct symbol
*framefunc
, CORE_ADDR pc
,
1047 const gdb_byte
**start
, size_t *length
);
1049 /* Return the frame base address. FRAME is the frame for which we want to
1050 compute the base address while FRAMEFUNC is the symbol for the
1051 corresponding function. Return 0 on failure (FRAMEFUNC may not hold the
1052 information we need).
1054 This method is designed to work with static links (nested functions
1055 handling). Static links are function properties whose evaluation returns
1056 the frame base address for the enclosing frame. However, there are
1057 multiple definitions for "frame base": the content of the frame base
1058 register, the CFA as defined by DWARF unwinding information, ...
1060 So this specific method is supposed to compute the frame base address such
1061 as for nested functions, the static link computes the same address. For
1062 instance, considering DWARF debugging information, the static link is
1063 computed with DW_AT_static_link and this method must be used to compute
1064 the corresponding DW_AT_frame_base attribute. */
1065 CORE_ADDR (*get_frame_base
) (struct symbol
*framefunc
,
1066 struct frame_info
*frame
);
1069 /* Functions used with LOC_REGISTER and LOC_REGPARM_ADDR. */
1071 struct symbol_register_ops
1073 int (*register_number
) (struct symbol
*symbol
, struct gdbarch
*gdbarch
);
1076 /* Objects of this type are used to find the address class and the
1077 various computed ops vectors of a symbol. */
1081 enum address_class aclass
;
1083 /* Used with LOC_COMPUTED. */
1084 const struct symbol_computed_ops
*ops_computed
;
1086 /* Used with LOC_BLOCK. */
1087 const struct symbol_block_ops
*ops_block
;
1089 /* Used with LOC_REGISTER and LOC_REGPARM_ADDR. */
1090 const struct symbol_register_ops
*ops_register
;
1093 /* struct symbol has some subclasses. This enum is used to
1094 differentiate between them. */
1096 enum symbol_subclass_kind
1098 /* Plain struct symbol. */
1101 /* struct template_symbol. */
1104 /* struct rust_vtable_symbol. */
1108 extern const struct symbol_impl
*symbol_impls
;
1110 /* This structure is space critical. See space comments at the top. */
1112 struct symbol
: public general_symbol_info
, public allocate_on_obstack
1115 /* Class-initialization of bitfields is only allowed in C++20. */
1116 : m_domain (UNDEF_DOMAIN
),
1118 m_is_objfile_owned (1),
1122 subclass (SYMBOL_NONE
),
1125 /* We can't use an initializer list for members of a base class, and
1126 general_symbol_info needs to stay a POD type. */
1129 language_specific
.obstack
= nullptr;
1130 m_language
= language_unknown
;
1133 /* GCC 4.8.5 (on CentOS 7) does not correctly compile class-
1134 initialization of unions, so we initialize it manually here. */
1135 owner
.symtab
= nullptr;
1138 symbol (const symbol
&) = default;
1139 symbol
&operator= (const symbol
&) = default;
1141 unsigned int aclass_index () const
1143 return m_aclass_index
;
1146 void set_aclass_index (unsigned int aclass_index
)
1148 m_aclass_index
= aclass_index
;
1151 const symbol_impl
&impl () const
1153 return symbol_impls
[this->aclass_index ()];
1156 address_class
aclass () const
1158 return this->impl ().aclass
;
1161 domain_enum
domain () const
1166 void set_domain (domain_enum domain
)
1171 bool is_objfile_owned () const
1173 return m_is_objfile_owned
;
1176 void set_is_objfile_owned (bool is_objfile_owned
)
1178 m_is_objfile_owned
= is_objfile_owned
;
1181 bool is_argument () const
1183 return m_is_argument
;
1186 void set_is_argument (bool is_argument
)
1188 m_is_argument
= is_argument
;
1191 bool is_inlined () const
1193 return m_is_inlined
;
1196 void set_is_inlined (bool is_inlined
)
1198 m_is_inlined
= is_inlined
;
1201 bool is_cplus_template_function () const
1203 return this->subclass
== SYMBOL_TEMPLATE
;
1206 struct type
*type () const
1211 void set_type (struct type
*type
)
1216 unsigned short line () const
1221 void set_line (unsigned short line
)
1226 /* Data type of value */
1228 struct type
*m_type
= nullptr;
1230 /* The owner of this symbol.
1231 Which one to use is defined by symbol.is_objfile_owned. */
1235 /* The symbol table containing this symbol. This is the file associated
1236 with LINE. It can be NULL during symbols read-in but it is never NULL
1237 during normal operation. */
1238 struct symtab
*symtab
;
1240 /* For types defined by the architecture. */
1241 struct gdbarch
*arch
;
1246 ENUM_BITFIELD(domain_enum_tag
) m_domain
: SYMBOL_DOMAIN_BITS
;
1248 /* Address class. This holds an index into the 'symbol_impls'
1249 table. The actual enum address_class value is stored there,
1250 alongside any per-class ops vectors. */
1252 unsigned int m_aclass_index
: SYMBOL_ACLASS_BITS
;
1254 /* If non-zero then symbol is objfile-owned, use owner.symtab.
1255 Otherwise symbol is arch-owned, use owner.arch. */
1257 unsigned int m_is_objfile_owned
: 1;
1259 /* Whether this is an argument. */
1261 unsigned m_is_argument
: 1;
1263 /* Whether this is an inlined function (class LOC_BLOCK only). */
1264 unsigned m_is_inlined
: 1;
1266 /* For LOC_STATIC only, if this is set, then the symbol might be
1267 subject to copy relocation. In this case, a minimal symbol
1268 matching the symbol's linkage name is first looked for in the
1269 main objfile. If found, then that address is used; otherwise the
1270 address in this symbol is used. */
1272 unsigned maybe_copied
: 1;
1274 /* The concrete type of this symbol. */
1276 ENUM_BITFIELD (symbol_subclass_kind
) subclass
: 2;
1278 /* Whether this symbol is artificial. */
1280 bool artificial
: 1;
1282 /* Line number of this symbol's definition, except for inlined
1283 functions. For an inlined function (class LOC_BLOCK and
1284 SYMBOL_INLINED set) this is the line number of the function's call
1285 site. Inlined function symbols are not definitions, and they are
1286 never found by symbol table lookup.
1287 If this symbol is arch-owned, LINE shall be zero.
1289 FIXME: Should we really make the assumption that nobody will try
1290 to debug files longer than 64K lines? What about machine
1291 generated programs? */
1293 unsigned short m_line
= 0;
1295 /* An arbitrary data pointer, allowing symbol readers to record
1296 additional information on a per-symbol basis. Note that this data
1297 must be allocated using the same obstack as the symbol itself. */
1298 /* So far it is only used by:
1299 LOC_COMPUTED: to find the location information
1300 LOC_BLOCK (DWARF2 function): information used internally by the
1301 DWARF 2 code --- specifically, the location expression for the frame
1302 base for this function. */
1303 /* FIXME drow/2003-02-21: For the LOC_BLOCK case, it might be better
1304 to add a magic symbol to the block containing this information,
1305 or to have a generic debug info annotation slot for symbols. */
1307 void *aux_value
= nullptr;
1309 struct symbol
*hash_next
= nullptr;
1312 /* Several lookup functions return both a symbol and the block in which the
1313 symbol is found. This structure is used in these cases. */
1317 /* The symbol that was found, or NULL if no symbol was found. */
1318 struct symbol
*symbol
;
1320 /* If SYMBOL is not NULL, then this is the block in which the symbol is
1322 const struct block
*block
;
1325 /* Note: There is no accessor macro for symbol.owner because it is
1328 #define SYMBOL_COMPUTED_OPS(symbol) ((symbol)->impl ().ops_computed)
1329 #define SYMBOL_BLOCK_OPS(symbol) ((symbol)->impl ().ops_block)
1330 #define SYMBOL_REGISTER_OPS(symbol) ((symbol)->impl ().ops_register)
1331 #define SYMBOL_LOCATION_BATON(symbol) (symbol)->aux_value
1333 extern int register_symbol_computed_impl (enum address_class
,
1334 const struct symbol_computed_ops
*);
1336 extern int register_symbol_block_impl (enum address_class aclass
,
1337 const struct symbol_block_ops
*ops
);
1339 extern int register_symbol_register_impl (enum address_class
,
1340 const struct symbol_register_ops
*);
1342 /* Return the OBJFILE of SYMBOL.
1343 It is an error to call this if symbol.is_objfile_owned is false, which
1344 only happens for architecture-provided types. */
1346 extern struct objfile
*symbol_objfile (const struct symbol
*symbol
);
1348 /* Return the ARCH of SYMBOL. */
1350 extern struct gdbarch
*symbol_arch (const struct symbol
*symbol
);
1352 /* Return the SYMTAB of SYMBOL.
1353 It is an error to call this if symbol.is_objfile_owned is false, which
1354 only happens for architecture-provided types. */
1356 extern struct symtab
*symbol_symtab (const struct symbol
*symbol
);
1358 /* Set the symtab of SYMBOL to SYMTAB.
1359 It is an error to call this if symbol.is_objfile_owned is false, which
1360 only happens for architecture-provided types. */
1362 extern void symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
);
1364 /* An instance of this type is used to represent a C++ template
1365 function. A symbol is really of this type iff
1366 symbol::is_cplus_template_function is true. */
1368 struct template_symbol
: public symbol
1370 /* The number of template arguments. */
1371 int n_template_arguments
= 0;
1373 /* The template arguments. This is an array with
1374 N_TEMPLATE_ARGUMENTS elements. */
1375 struct symbol
**template_arguments
= nullptr;
1378 /* A symbol that represents a Rust virtual table object. */
1380 struct rust_vtable_symbol
: public symbol
1382 /* The concrete type for which this vtable was created; that is, in
1383 "impl Trait for Type", this is "Type". */
1384 struct type
*concrete_type
= nullptr;
1388 /* Each item represents a line-->pc (or the reverse) mapping. This is
1389 somewhat more wasteful of space than one might wish, but since only
1390 the files which are actually debugged are read in to core, we don't
1391 waste much space. */
1393 struct linetable_entry
1395 /* The line number for this entry. */
1398 /* True if this PC is a good location to place a breakpoint for LINE. */
1399 unsigned is_stmt
: 1;
1401 /* True if this location is a good location to place a breakpoint after a
1402 function prologue. */
1403 bool prologue_end
: 1;
1405 /* The address for this entry. */
1409 /* The order of entries in the linetable is significant. They should
1410 be sorted by increasing values of the pc field. If there is more than
1411 one entry for a given pc, then I'm not sure what should happen (and
1412 I not sure whether we currently handle it the best way).
1414 Example: a C for statement generally looks like this
1416 10 0x100 - for the init/test part of a for stmt.
1419 10 0x400 - for the increment part of a for stmt.
1421 If an entry has a line number of zero, it marks the start of a PC
1422 range for which no line number information is available. It is
1423 acceptable, though wasteful of table space, for such a range to be
1430 /* Actually NITEMS elements. If you don't like this use of the
1431 `struct hack', you can shove it up your ANSI (seriously, if the
1432 committee tells us how to do it, we can probably go along). */
1433 struct linetable_entry item
[1];
1436 /* How to relocate the symbols from each section in a symbol file.
1437 The ordering and meaning of the offsets is file-type-dependent;
1438 typically it is indexed by section numbers or symbol types or
1439 something like that. */
1441 typedef std::vector
<CORE_ADDR
> section_offsets
;
1443 /* Each source file or header is represented by a struct symtab.
1444 The name "symtab" is historical, another name for it is "filetab".
1445 These objects are chained through the `next' field. */
1449 struct compunit_symtab
*compunit () const
1454 void set_compunit (struct compunit_symtab
*compunit
)
1456 m_compunit
= compunit
;
1459 struct linetable
*linetable () const
1464 void set_linetable (struct linetable
*linetable
)
1466 m_linetable
= linetable
;
1469 enum language
language () const
1474 void set_language (enum language language
)
1476 m_language
= language
;
1479 const struct blockvector
*blockvector () const;
1481 struct objfile
*objfile () const;
1483 program_space
*pspace () const;
1485 const char *dirname () const;
1487 /* Unordered chain of all filetabs in the compunit, with the exception
1488 that the "main" source file is the first entry in the list. */
1490 struct symtab
*next
;
1492 /* Backlink to containing compunit symtab. */
1494 struct compunit_symtab
*m_compunit
;
1496 /* Table mapping core addresses to line numbers for this file.
1497 Can be NULL if none. Never shared between different symtabs. */
1499 struct linetable
*m_linetable
;
1501 /* Name of this source file. This pointer is never NULL. */
1503 const char *filename
;
1505 /* Language of this source file. */
1507 enum language m_language
;
1509 /* Full name of file as found by searching the source path.
1510 NULL if not yet known. */
1515 /* A range adapter to allowing iterating over all the file tables in a list. */
1517 using symtab_range
= next_range
<symtab
>;
1519 /* Compunit symtabs contain the actual "symbol table", aka blockvector, as well
1520 as the list of all source files (what gdb has historically associated with
1522 Additional information is recorded here that is common to all symtabs in a
1523 compilation unit (DWARF or otherwise).
1526 For the case of a program built out of these files:
1535 This is recorded as:
1537 objfile -> foo.c(cu) -> bar.c(cu) -> NULL
1551 where "foo.c(cu)" and "bar.c(cu)" are struct compunit_symtab objects,
1552 and the files foo.c, etc. are struct symtab objects. */
1554 struct compunit_symtab
1556 struct objfile
*objfile () const
1561 void set_objfile (struct objfile
*objfile
)
1563 m_objfile
= objfile
;
1566 symtab_range
filetabs () const
1568 return symtab_range (m_filetabs
);
1571 void add_filetab (symtab
*filetab
)
1573 if (m_filetabs
== nullptr)
1575 m_filetabs
= filetab
;
1576 m_last_filetab
= filetab
;
1580 m_last_filetab
->next
= filetab
;
1581 m_last_filetab
= filetab
;
1585 const char *debugformat () const
1587 return m_debugformat
;
1590 void set_debugformat (const char *debugformat
)
1592 m_debugformat
= debugformat
;
1595 const char *producer () const
1600 void set_producer (const char *producer
)
1602 m_producer
= producer
;
1605 const char *dirname () const
1610 void set_dirname (const char *dirname
)
1612 m_dirname
= dirname
;
1615 const struct blockvector
*blockvector () const
1617 return m_blockvector
;
1620 void set_blockvector (const struct blockvector
*blockvector
)
1622 m_blockvector
= blockvector
;
1625 int block_line_section () const
1627 return m_block_line_section
;
1630 void set_block_line_section (int block_line_section
)
1632 m_block_line_section
= block_line_section
;
1635 bool locations_valid () const
1637 return m_locations_valid
;
1640 void set_locations_valid (bool locations_valid
)
1642 m_locations_valid
= locations_valid
;
1645 bool epilogue_unwind_valid () const
1647 return m_epilogue_unwind_valid
;
1650 void set_epilogue_unwind_valid (bool epilogue_unwind_valid
)
1652 m_epilogue_unwind_valid
= epilogue_unwind_valid
;
1655 struct macro_table
*macro_table () const
1657 return m_macro_table
;
1660 void set_macro_table (struct macro_table
*macro_table
)
1662 m_macro_table
= macro_table
;
1665 /* Make PRIMARY_FILETAB the primary filetab of this compunit symtab.
1667 PRIMARY_FILETAB must already be a filetab of this compunit symtab. */
1669 void set_primary_filetab (symtab
*primary_filetab
);
1671 /* Return the primary filetab of the compunit. */
1672 symtab
*primary_filetab () const;
1674 /* Set m_call_site_htab. */
1675 void set_call_site_htab (htab_t call_site_htab
);
1677 /* Find call_site info for PC. */
1678 call_site
*find_call_site (CORE_ADDR pc
) const;
1680 /* Unordered chain of all compunit symtabs of this objfile. */
1681 struct compunit_symtab
*next
;
1683 /* Object file from which this symtab information was read. */
1684 struct objfile
*m_objfile
;
1686 /* Name of the symtab.
1687 This is *not* intended to be a usable filename, and is
1688 for debugging purposes only. */
1691 /* Unordered list of file symtabs, except that by convention the "main"
1692 source file (e.g., .c, .cc) is guaranteed to be first.
1693 Each symtab is a file, either the "main" source file (e.g., .c, .cc)
1694 or header (e.g., .h). */
1697 /* Last entry in FILETABS list.
1698 Subfiles are added to the end of the list so they accumulate in order,
1699 with the main source subfile living at the front.
1700 The main reason is so that the main source file symtab is at the head
1701 of the list, and the rest appear in order for debugging convenience. */
1702 symtab
*m_last_filetab
;
1704 /* Non-NULL string that identifies the format of the debugging information,
1705 such as "stabs", "dwarf 1", "dwarf 2", "coff", etc. This is mostly useful
1706 for automated testing of gdb but may also be information that is
1707 useful to the user. */
1708 const char *m_debugformat
;
1710 /* String of producer version information, or NULL if we don't know. */
1711 const char *m_producer
;
1713 /* Directory in which it was compiled, or NULL if we don't know. */
1714 const char *m_dirname
;
1716 /* List of all symbol scope blocks for this symtab. It is shared among
1717 all symtabs in a given compilation unit. */
1718 const struct blockvector
*m_blockvector
;
1720 /* Section in objfile->section_offsets for the blockvector and
1721 the linetable. Probably always SECT_OFF_TEXT. */
1722 int m_block_line_section
;
1724 /* Symtab has been compiled with both optimizations and debug info so that
1725 GDB may stop skipping prologues as variables locations are valid already
1726 at function entry points. */
1727 unsigned int m_locations_valid
: 1;
1729 /* DWARF unwinder for this CU is valid even for epilogues (PC at the return
1730 instruction). This is supported by GCC since 4.5.0. */
1731 unsigned int m_epilogue_unwind_valid
: 1;
1733 /* struct call_site entries for this compilation unit or NULL. */
1734 htab_t m_call_site_htab
;
1736 /* The macro table for this symtab. Like the blockvector, this
1737 is shared between different symtabs in a given compilation unit.
1738 It's debatable whether it *should* be shared among all the symtabs in
1739 the given compilation unit, but it currently is. */
1740 struct macro_table
*m_macro_table
;
1742 /* If non-NULL, then this points to a NULL-terminated vector of
1743 included compunits. When searching the static or global
1744 block of this compunit, the corresponding block of all
1745 included compunits will also be searched. Note that this
1746 list must be flattened -- the symbol reader is responsible for
1747 ensuring that this vector contains the transitive closure of all
1748 included compunits. */
1749 struct compunit_symtab
**includes
;
1751 /* If this is an included compunit, this points to one includer
1752 of the table. This user is considered the canonical compunit
1753 containing this one. An included compunit may itself be
1754 included by another. */
1755 struct compunit_symtab
*user
;
1758 using compunit_symtab_range
= next_range
<compunit_symtab
>;
1760 inline const struct blockvector
*
1761 symtab::blockvector () const
1763 return this->compunit ()->blockvector ();
1766 inline struct objfile
*
1767 symtab::objfile () const
1769 return this->compunit ()->objfile ();
1773 symtab::dirname () const
1775 return this->compunit ()->dirname ();
1778 /* Return the language of CUST. */
1780 extern enum language
compunit_language (const struct compunit_symtab
*cust
);
1782 /* Return true if this symtab is the "main" symtab of its compunit_symtab. */
1785 is_main_symtab_of_compunit_symtab (struct symtab
*symtab
)
1787 return symtab
== symtab
->compunit ()->primary_filetab ();
1791 /* The virtual function table is now an array of structures which have the
1792 form { int16 offset, delta; void *pfn; }.
1794 In normal virtual function tables, OFFSET is unused.
1795 DELTA is the amount which is added to the apparent object's base
1796 address in order to point to the actual object to which the
1797 virtual function should be applied.
1798 PFN is a pointer to the virtual function.
1800 Note that this macro is g++ specific (FIXME). */
1802 #define VTBL_FNADDR_OFFSET 2
1804 /* External variables and functions for the objects described above. */
1806 /* True if we are nested inside psymtab_to_symtab. */
1808 extern int currently_reading_symtab
;
1810 /* symtab.c lookup functions */
1812 extern const char multiple_symbols_ask
[];
1813 extern const char multiple_symbols_all
[];
1814 extern const char multiple_symbols_cancel
[];
1816 const char *multiple_symbols_select_mode (void);
1818 bool symbol_matches_domain (enum language symbol_language
,
1819 domain_enum symbol_domain
,
1820 domain_enum domain
);
1822 /* lookup a symbol table by source file name. */
1824 extern struct symtab
*lookup_symtab (const char *);
1826 /* An object of this type is passed as the 'is_a_field_of_this'
1827 argument to lookup_symbol and lookup_symbol_in_language. */
1829 struct field_of_this_result
1831 /* The type in which the field was found. If this is NULL then the
1832 symbol was not found in 'this'. If non-NULL, then one of the
1833 other fields will be non-NULL as well. */
1837 /* If the symbol was found as an ordinary field of 'this', then this
1838 is non-NULL and points to the particular field. */
1840 struct field
*field
;
1842 /* If the symbol was found as a function field of 'this', then this
1843 is non-NULL and points to the particular field. */
1845 struct fn_fieldlist
*fn_field
;
1848 /* Find the definition for a specified symbol name NAME
1849 in domain DOMAIN in language LANGUAGE, visible from lexical block BLOCK
1850 if non-NULL or from global/static blocks if BLOCK is NULL.
1851 Returns the struct symbol pointer, or NULL if no symbol is found.
1852 C++: if IS_A_FIELD_OF_THIS is non-NULL on entry, check to see if
1853 NAME is a field of the current implied argument `this'. If so fill in the
1854 fields of IS_A_FIELD_OF_THIS, otherwise the fields are set to NULL.
1855 The symbol's section is fixed up if necessary. */
1857 extern struct block_symbol
1858 lookup_symbol_in_language (const char *,
1859 const struct block
*,
1862 struct field_of_this_result
*);
1864 /* Same as lookup_symbol_in_language, but using the current language. */
1866 extern struct block_symbol
lookup_symbol (const char *,
1867 const struct block
*,
1869 struct field_of_this_result
*);
1871 /* Find the definition for a specified symbol search name in domain
1872 DOMAIN, visible from lexical block BLOCK if non-NULL or from
1873 global/static blocks if BLOCK is NULL. The passed-in search name
1874 should not come from the user; instead it should already be a
1875 search name as retrieved from a search_name () call. See definition of
1876 symbol_name_match_type::SEARCH_NAME. Returns the struct symbol
1877 pointer, or NULL if no symbol is found. The symbol's section is
1878 fixed up if necessary. */
1880 extern struct block_symbol
lookup_symbol_search_name (const char *search_name
,
1881 const struct block
*block
,
1882 domain_enum domain
);
1884 /* Some helper functions for languages that need to write their own
1885 lookup_symbol_nonlocal functions. */
1887 /* Lookup a symbol in the static block associated to BLOCK, if there
1888 is one; do nothing if BLOCK is NULL or a global block.
1889 Upon success fixes up the symbol's section if necessary. */
1891 extern struct block_symbol
1892 lookup_symbol_in_static_block (const char *name
,
1893 const struct block
*block
,
1894 const domain_enum domain
);
1896 /* Search all static file-level symbols for NAME from DOMAIN.
1897 Upon success fixes up the symbol's section if necessary. */
1899 extern struct block_symbol
lookup_static_symbol (const char *name
,
1900 const domain_enum domain
);
1902 /* Lookup a symbol in all files' global blocks.
1904 If BLOCK is non-NULL then it is used for two things:
1905 1) If a target-specific lookup routine for libraries exists, then use the
1906 routine for the objfile of BLOCK, and
1907 2) The objfile of BLOCK is used to assist in determining the search order
1908 if the target requires it.
1909 See gdbarch_iterate_over_objfiles_in_search_order.
1911 Upon success fixes up the symbol's section if necessary. */
1913 extern struct block_symbol
1914 lookup_global_symbol (const char *name
,
1915 const struct block
*block
,
1916 const domain_enum domain
);
1918 /* Lookup a symbol in block BLOCK.
1919 Upon success fixes up the symbol's section if necessary. */
1921 extern struct symbol
*
1922 lookup_symbol_in_block (const char *name
,
1923 symbol_name_match_type match_type
,
1924 const struct block
*block
,
1925 const domain_enum domain
);
1927 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1928 found, or NULL if not found. */
1930 extern struct block_symbol
1931 lookup_language_this (const struct language_defn
*lang
,
1932 const struct block
*block
);
1934 /* Lookup a [struct, union, enum] by name, within a specified block. */
1936 extern struct type
*lookup_struct (const char *, const struct block
*);
1938 extern struct type
*lookup_union (const char *, const struct block
*);
1940 extern struct type
*lookup_enum (const char *, const struct block
*);
1942 /* from blockframe.c: */
1944 /* lookup the function symbol corresponding to the address. The
1945 return value will not be an inlined function; the containing
1946 function will be returned instead. */
1948 extern struct symbol
*find_pc_function (CORE_ADDR
);
1950 /* lookup the function corresponding to the address and section. The
1951 return value will not be an inlined function; the containing
1952 function will be returned instead. */
1954 extern struct symbol
*find_pc_sect_function (CORE_ADDR
, struct obj_section
*);
1956 /* lookup the function symbol corresponding to the address and
1957 section. The return value will be the closest enclosing function,
1958 which might be an inline function. */
1960 extern struct symbol
*find_pc_sect_containing_function
1961 (CORE_ADDR pc
, struct obj_section
*section
);
1963 /* Find the symbol at the given address. Returns NULL if no symbol
1964 found. Only exact matches for ADDRESS are considered. */
1966 extern struct symbol
*find_symbol_at_address (CORE_ADDR
);
1968 /* Finds the "function" (text symbol) that is smaller than PC but
1969 greatest of all of the potential text symbols in SECTION. Sets
1970 *NAME and/or *ADDRESS conditionally if that pointer is non-null.
1971 If ENDADDR is non-null, then set *ENDADDR to be the end of the
1972 function (exclusive). If the optional parameter BLOCK is non-null,
1973 then set *BLOCK to the address of the block corresponding to the
1974 function symbol, if such a symbol could be found during the lookup;
1975 nullptr is used as a return value for *BLOCK if no block is found.
1976 This function either succeeds or fails (not halfway succeeds). If
1977 it succeeds, it sets *NAME, *ADDRESS, and *ENDADDR to real
1978 information and returns true. If it fails, it sets *NAME, *ADDRESS
1979 and *ENDADDR to zero and returns false.
1981 If the function in question occupies non-contiguous ranges,
1982 *ADDRESS and *ENDADDR are (subject to the conditions noted above) set
1983 to the start and end of the range in which PC is found. Thus
1984 *ADDRESS <= PC < *ENDADDR with no intervening gaps (in which ranges
1985 from other functions might be found).
1987 This property allows find_pc_partial_function to be used (as it had
1988 been prior to the introduction of non-contiguous range support) by
1989 various tdep files for finding a start address and limit address
1990 for prologue analysis. This still isn't ideal, however, because we
1991 probably shouldn't be doing prologue analysis (in which
1992 instructions are scanned to determine frame size and stack layout)
1993 for any range that doesn't contain the entry pc. Moreover, a good
1994 argument can be made that prologue analysis ought to be performed
1995 starting from the entry pc even when PC is within some other range.
1996 This might suggest that *ADDRESS and *ENDADDR ought to be set to the
1997 limits of the entry pc range, but that will cause the
1998 *ADDRESS <= PC < *ENDADDR condition to be violated; many of the
1999 callers of find_pc_partial_function expect this condition to hold.
2001 Callers which require the start and/or end addresses for the range
2002 containing the entry pc should instead call
2003 find_function_entry_range_from_pc. */
2005 extern bool find_pc_partial_function (CORE_ADDR pc
, const char **name
,
2006 CORE_ADDR
*address
, CORE_ADDR
*endaddr
,
2007 const struct block
**block
= nullptr);
2009 /* Like find_pc_partial_function, above, but returns the underlying
2010 general_symbol_info (rather than the name) as an out parameter. */
2012 extern bool find_pc_partial_function_sym
2013 (CORE_ADDR pc
, const general_symbol_info
**sym
,
2014 CORE_ADDR
*address
, CORE_ADDR
*endaddr
,
2015 const struct block
**block
= nullptr);
2017 /* Like find_pc_partial_function, above, but *ADDRESS and *ENDADDR are
2018 set to start and end addresses of the range containing the entry pc.
2020 Note that it is not necessarily the case that (for non-NULL ADDRESS
2021 and ENDADDR arguments) the *ADDRESS <= PC < *ENDADDR condition will
2024 See comment for find_pc_partial_function, above, for further
2027 extern bool find_function_entry_range_from_pc (CORE_ADDR pc
,
2030 CORE_ADDR
*endaddr
);
2032 /* Return the type of a function with its first instruction exactly at
2033 the PC address. Return NULL otherwise. */
2035 extern struct type
*find_function_type (CORE_ADDR pc
);
2037 /* See if we can figure out the function's actual type from the type
2038 that the resolver returns. RESOLVER_FUNADDR is the address of the
2041 extern struct type
*find_gnu_ifunc_target_type (CORE_ADDR resolver_funaddr
);
2043 /* Find the GNU ifunc minimal symbol that matches SYM. */
2044 extern bound_minimal_symbol
find_gnu_ifunc (const symbol
*sym
);
2046 extern void clear_pc_function_cache (void);
2048 /* Expand symtab containing PC, SECTION if not already expanded. */
2050 extern void expand_symtab_containing_pc (CORE_ADDR
, struct obj_section
*);
2052 /* lookup full symbol table by address. */
2054 extern struct compunit_symtab
*find_pc_compunit_symtab (CORE_ADDR
);
2056 /* lookup full symbol table by address and section. */
2058 extern struct compunit_symtab
*
2059 find_pc_sect_compunit_symtab (CORE_ADDR
, struct obj_section
*);
2061 extern bool find_pc_line_pc_range (CORE_ADDR
, CORE_ADDR
*, CORE_ADDR
*);
2063 extern void reread_symbols (int from_tty
);
2065 /* Look up a type named NAME in STRUCT_DOMAIN in the current language.
2066 The type returned must not be opaque -- i.e., must have at least one field
2069 extern struct type
*lookup_transparent_type (const char *);
2071 extern struct type
*basic_lookup_transparent_type (const char *);
2073 /* Macro for name of symbol to indicate a file compiled with gcc. */
2074 #ifndef GCC_COMPILED_FLAG_SYMBOL
2075 #define GCC_COMPILED_FLAG_SYMBOL "gcc_compiled."
2078 /* Macro for name of symbol to indicate a file compiled with gcc2. */
2079 #ifndef GCC2_COMPILED_FLAG_SYMBOL
2080 #define GCC2_COMPILED_FLAG_SYMBOL "gcc2_compiled."
2083 extern bool in_gnu_ifunc_stub (CORE_ADDR pc
);
2085 /* Functions for resolving STT_GNU_IFUNC symbols which are implemented only
2086 for ELF symbol files. */
2088 struct gnu_ifunc_fns
2090 /* See elf_gnu_ifunc_resolve_addr for its real implementation. */
2091 CORE_ADDR (*gnu_ifunc_resolve_addr
) (struct gdbarch
*gdbarch
, CORE_ADDR pc
);
2093 /* See elf_gnu_ifunc_resolve_name for its real implementation. */
2094 bool (*gnu_ifunc_resolve_name
) (const char *function_name
,
2095 CORE_ADDR
*function_address_p
);
2097 /* See elf_gnu_ifunc_resolver_stop for its real implementation. */
2098 void (*gnu_ifunc_resolver_stop
) (struct breakpoint
*b
);
2100 /* See elf_gnu_ifunc_resolver_return_stop for its real implementation. */
2101 void (*gnu_ifunc_resolver_return_stop
) (struct breakpoint
*b
);
2104 #define gnu_ifunc_resolve_addr gnu_ifunc_fns_p->gnu_ifunc_resolve_addr
2105 #define gnu_ifunc_resolve_name gnu_ifunc_fns_p->gnu_ifunc_resolve_name
2106 #define gnu_ifunc_resolver_stop gnu_ifunc_fns_p->gnu_ifunc_resolver_stop
2107 #define gnu_ifunc_resolver_return_stop \
2108 gnu_ifunc_fns_p->gnu_ifunc_resolver_return_stop
2110 extern const struct gnu_ifunc_fns
*gnu_ifunc_fns_p
;
2112 extern CORE_ADDR
find_solib_trampoline_target (struct frame_info
*, CORE_ADDR
);
2114 struct symtab_and_line
2116 /* The program space of this sal. */
2117 struct program_space
*pspace
= NULL
;
2119 struct symtab
*symtab
= NULL
;
2120 struct symbol
*symbol
= NULL
;
2121 struct obj_section
*section
= NULL
;
2122 struct minimal_symbol
*msymbol
= NULL
;
2123 /* Line number. Line numbers start at 1 and proceed through symtab->nlines.
2124 0 is never a valid line number; it is used to indicate that line number
2125 information is not available. */
2130 bool explicit_pc
= false;
2131 bool explicit_line
= false;
2133 /* If the line number information is valid, then this indicates if this
2134 line table entry had the is-stmt flag set or not. */
2135 bool is_stmt
= false;
2137 /* The probe associated with this symtab_and_line. */
2139 /* If PROBE is not NULL, then this is the objfile in which the probe
2141 struct objfile
*objfile
= NULL
;
2146 /* Given a pc value, return line number it is in. Second arg nonzero means
2147 if pc is on the boundary use the previous statement's line number. */
2149 extern struct symtab_and_line
find_pc_line (CORE_ADDR
, int);
2151 /* Same function, but specify a section as well as an address. */
2153 extern struct symtab_and_line
find_pc_sect_line (CORE_ADDR
,
2154 struct obj_section
*, int);
2156 /* Wrapper around find_pc_line to just return the symtab. */
2158 extern struct symtab
*find_pc_line_symtab (CORE_ADDR
);
2160 /* Given a symtab and line number, return the pc there. */
2162 extern bool find_line_pc (struct symtab
*, int, CORE_ADDR
*);
2164 extern bool find_line_pc_range (struct symtab_and_line
, CORE_ADDR
*,
2167 extern void resolve_sal_pc (struct symtab_and_line
*);
2171 extern void clear_solib (void);
2173 /* The reason we're calling into a completion match list collector
2175 enum class complete_symbol_mode
2177 /* Completing an expression. */
2180 /* Completing a linespec. */
2184 extern void default_collect_symbol_completion_matches_break_on
2185 (completion_tracker
&tracker
,
2186 complete_symbol_mode mode
,
2187 symbol_name_match_type name_match_type
,
2188 const char *text
, const char *word
, const char *break_on
,
2189 enum type_code code
);
2190 extern void collect_symbol_completion_matches
2191 (completion_tracker
&tracker
,
2192 complete_symbol_mode mode
,
2193 symbol_name_match_type name_match_type
,
2194 const char *, const char *);
2195 extern void collect_symbol_completion_matches_type (completion_tracker
&tracker
,
2196 const char *, const char *,
2199 extern void collect_file_symbol_completion_matches
2200 (completion_tracker
&tracker
,
2201 complete_symbol_mode
,
2202 symbol_name_match_type name_match_type
,
2203 const char *, const char *, const char *);
2205 extern completion_list
2206 make_source_files_completion_list (const char *, const char *);
2208 /* Return whether SYM is a function/method, as opposed to a data symbol. */
2210 extern bool symbol_is_function_or_method (symbol
*sym
);
2212 /* Return whether MSYMBOL is a function/method, as opposed to a data
2215 extern bool symbol_is_function_or_method (minimal_symbol
*msymbol
);
2217 /* Return whether SYM should be skipped in completion mode MODE. In
2218 linespec mode, we're only interested in functions/methods. */
2220 template<typename Symbol
>
2222 completion_skip_symbol (complete_symbol_mode mode
, Symbol
*sym
)
2224 return (mode
== complete_symbol_mode::LINESPEC
2225 && !symbol_is_function_or_method (sym
));
2230 bool matching_obj_sections (struct obj_section
*, struct obj_section
*);
2232 extern struct symtab
*find_line_symtab (struct symtab
*, int, int *, bool *);
2234 /* Given a function symbol SYM, find the symtab and line for the start
2235 of the function. If FUNFIRSTLINE is true, we want the first line
2236 of real code inside the function. */
2237 extern symtab_and_line
find_function_start_sal (symbol
*sym
, bool
2240 /* Same, but start with a function address/section instead of a
2242 extern symtab_and_line
find_function_start_sal (CORE_ADDR func_addr
,
2243 obj_section
*section
,
2246 extern void skip_prologue_sal (struct symtab_and_line
*);
2250 extern CORE_ADDR
skip_prologue_using_sal (struct gdbarch
*gdbarch
,
2251 CORE_ADDR func_addr
);
2253 extern struct symbol
*fixup_symbol_section (struct symbol
*,
2256 /* If MSYMBOL is an text symbol, look for a function debug symbol with
2257 the same address. Returns NULL if not found. This is necessary in
2258 case a function is an alias to some other function, because debug
2259 information is only emitted for the alias target function's
2260 definition, not for the alias. */
2261 extern symbol
*find_function_alias_target (bound_minimal_symbol msymbol
);
2263 /* Symbol searching */
2265 /* When using the symbol_searcher struct to search for symbols, a vector of
2266 the following structs is returned. */
2267 struct symbol_search
2269 symbol_search (int block_
, struct symbol
*symbol_
)
2273 msymbol
.minsym
= nullptr;
2274 msymbol
.objfile
= nullptr;
2277 symbol_search (int block_
, struct minimal_symbol
*minsym
,
2278 struct objfile
*objfile
)
2282 msymbol
.minsym
= minsym
;
2283 msymbol
.objfile
= objfile
;
2286 bool operator< (const symbol_search
&other
) const
2288 return compare_search_syms (*this, other
) < 0;
2291 bool operator== (const symbol_search
&other
) const
2293 return compare_search_syms (*this, other
) == 0;
2296 /* The block in which the match was found. Could be, for example,
2297 STATIC_BLOCK or GLOBAL_BLOCK. */
2300 /* Information describing what was found.
2302 If symbol is NOT NULL, then information was found for this match. */
2303 struct symbol
*symbol
;
2305 /* If msymbol is non-null, then a match was made on something for
2306 which only minimal_symbols exist. */
2307 struct bound_minimal_symbol msymbol
;
2311 static int compare_search_syms (const symbol_search
&sym_a
,
2312 const symbol_search
&sym_b
);
2315 /* In order to search for global symbols of a particular kind matching
2316 particular regular expressions, create an instance of this structure and
2317 call the SEARCH member function. */
2318 class global_symbol_searcher
2323 global_symbol_searcher (enum search_domain kind
,
2324 const char *symbol_name_regexp
)
2326 m_symbol_name_regexp (symbol_name_regexp
)
2328 /* The symbol searching is designed to only find one kind of thing. */
2329 gdb_assert (m_kind
!= ALL_DOMAIN
);
2332 /* Set the optional regexp that matches against the symbol type. */
2333 void set_symbol_type_regexp (const char *regexp
)
2335 m_symbol_type_regexp
= regexp
;
2338 /* Set the flag to exclude minsyms from the search results. */
2339 void set_exclude_minsyms (bool exclude_minsyms
)
2341 m_exclude_minsyms
= exclude_minsyms
;
2344 /* Set the maximum number of search results to be returned. */
2345 void set_max_search_results (size_t max_search_results
)
2347 m_max_search_results
= max_search_results
;
2350 /* Search the symbols from all objfiles in the current program space
2351 looking for matches as defined by the current state of this object.
2353 Within each file the results are sorted locally; each symtab's global
2354 and static blocks are separately alphabetized. Duplicate entries are
2356 std::vector
<symbol_search
> search () const;
2358 /* The set of source files to search in for matching symbols. This is
2359 currently public so that it can be populated after this object has
2360 been constructed. */
2361 std::vector
<const char *> filenames
;
2364 /* The kind of symbols are we searching for.
2365 VARIABLES_DOMAIN - Search all symbols, excluding functions, type
2366 names, and constants (enums).
2367 FUNCTIONS_DOMAIN - Search all functions..
2368 TYPES_DOMAIN - Search all type names.
2369 MODULES_DOMAIN - Search all Fortran modules.
2370 ALL_DOMAIN - Not valid for this function. */
2371 enum search_domain m_kind
;
2373 /* Regular expression to match against the symbol name. */
2374 const char *m_symbol_name_regexp
= nullptr;
2376 /* Regular expression to match against the symbol type. */
2377 const char *m_symbol_type_regexp
= nullptr;
2379 /* When this flag is false then minsyms that match M_SYMBOL_REGEXP will
2380 be included in the results, otherwise they are excluded. */
2381 bool m_exclude_minsyms
= false;
2383 /* Maximum number of search results. We currently impose a hard limit
2384 of SIZE_MAX, there is no "unlimited". */
2385 size_t m_max_search_results
= SIZE_MAX
;
2387 /* Expand symtabs in OBJFILE that match PREG, are of type M_KIND. Return
2388 true if any msymbols were seen that we should later consider adding to
2389 the results list. */
2390 bool expand_symtabs (objfile
*objfile
,
2391 const gdb::optional
<compiled_regex
> &preg
) const;
2393 /* Add symbols from symtabs in OBJFILE that match PREG, and TREG, and are
2394 of type M_KIND, to the results set RESULTS_SET. Return false if we
2395 stop adding results early due to having already found too many results
2396 (based on M_MAX_SEARCH_RESULTS limit), otherwise return true.
2397 Returning true does not indicate that any results were added, just
2398 that we didn't _not_ add a result due to reaching MAX_SEARCH_RESULTS. */
2399 bool add_matching_symbols (objfile
*objfile
,
2400 const gdb::optional
<compiled_regex
> &preg
,
2401 const gdb::optional
<compiled_regex
> &treg
,
2402 std::set
<symbol_search
> *result_set
) const;
2404 /* Add msymbols from OBJFILE that match PREG and M_KIND, to the results
2405 vector RESULTS. Return false if we stop adding results early due to
2406 having already found too many results (based on max search results
2407 limit M_MAX_SEARCH_RESULTS), otherwise return true. Returning true
2408 does not indicate that any results were added, just that we didn't
2409 _not_ add a result due to reaching MAX_SEARCH_RESULTS. */
2410 bool add_matching_msymbols (objfile
*objfile
,
2411 const gdb::optional
<compiled_regex
> &preg
,
2412 std::vector
<symbol_search
> *results
) const;
2414 /* Return true if MSYMBOL is of type KIND. */
2415 static bool is_suitable_msymbol (const enum search_domain kind
,
2416 const minimal_symbol
*msymbol
);
2419 /* When searching for Fortran symbols within modules (functions/variables)
2420 we return a vector of this type. The first item in the pair is the
2421 module symbol, and the second item is the symbol for the function or
2422 variable we found. */
2423 typedef std::pair
<symbol_search
, symbol_search
> module_symbol_search
;
2425 /* Searches the symbols to find function and variables symbols (depending
2426 on KIND) within Fortran modules. The MODULE_REGEXP matches against the
2427 name of the module, REGEXP matches against the name of the symbol within
2428 the module, and TYPE_REGEXP matches against the type of the symbol
2429 within the module. */
2430 extern std::vector
<module_symbol_search
> search_module_symbols
2431 (const char *module_regexp
, const char *regexp
,
2432 const char *type_regexp
, search_domain kind
);
2434 /* Convert a global or static symbol SYM (based on BLOCK, which should be
2435 either GLOBAL_BLOCK or STATIC_BLOCK) into a string for use in 'info'
2436 type commands (e.g. 'info variables', 'info functions', etc). KIND is
2437 the type of symbol that was searched for which gave us SYM. */
2439 extern std::string
symbol_to_info_string (struct symbol
*sym
, int block
,
2440 enum search_domain kind
);
2442 extern bool treg_matches_sym_type_name (const compiled_regex
&treg
,
2443 const struct symbol
*sym
);
2445 /* The name of the ``main'' function. */
2446 extern const char *main_name ();
2447 extern enum language
main_language (void);
2449 /* Lookup symbol NAME from DOMAIN in MAIN_OBJFILE's global or static blocks,
2450 as specified by BLOCK_INDEX.
2451 This searches MAIN_OBJFILE as well as any associated separate debug info
2452 objfiles of MAIN_OBJFILE.
2453 BLOCK_INDEX can be GLOBAL_BLOCK or STATIC_BLOCK.
2454 Upon success fixes up the symbol's section if necessary. */
2456 extern struct block_symbol
2457 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2458 enum block_enum block_index
,
2460 const domain_enum domain
);
2462 /* Return 1 if the supplied producer string matches the ARM RealView
2463 compiler (armcc). */
2464 bool producer_is_realview (const char *producer
);
2466 void fixup_section (struct general_symbol_info
*ginfo
,
2467 CORE_ADDR addr
, struct objfile
*objfile
);
2469 extern unsigned int symtab_create_debug
;
2471 extern unsigned int symbol_lookup_debug
;
2473 extern bool basenames_may_differ
;
2475 bool compare_filenames_for_search (const char *filename
,
2476 const char *search_name
);
2478 bool compare_glob_filenames_for_search (const char *filename
,
2479 const char *search_name
);
2481 bool iterate_over_some_symtabs (const char *name
,
2482 const char *real_path
,
2483 struct compunit_symtab
*first
,
2484 struct compunit_symtab
*after_last
,
2485 gdb::function_view
<bool (symtab
*)> callback
);
2487 void iterate_over_symtabs (const char *name
,
2488 gdb::function_view
<bool (symtab
*)> callback
);
2491 std::vector
<CORE_ADDR
> find_pcs_for_symtab_line
2492 (struct symtab
*symtab
, int line
, struct linetable_entry
**best_entry
);
2494 /* Prototype for callbacks for LA_ITERATE_OVER_SYMBOLS. The callback
2495 is called once per matching symbol SYM. The callback should return
2496 true to indicate that LA_ITERATE_OVER_SYMBOLS should continue
2497 iterating, or false to indicate that the iteration should end. */
2499 typedef bool (symbol_found_callback_ftype
) (struct block_symbol
*bsym
);
2501 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2503 For each symbol that matches, CALLBACK is called. The symbol is
2504 passed to the callback.
2506 If CALLBACK returns false, the iteration ends and this function
2507 returns false. Otherwise, the search continues, and the function
2508 eventually returns true. */
2510 bool iterate_over_symbols (const struct block
*block
,
2511 const lookup_name_info
&name
,
2512 const domain_enum domain
,
2513 gdb::function_view
<symbol_found_callback_ftype
> callback
);
2515 /* Like iterate_over_symbols, but if all calls to CALLBACK return
2516 true, then calls CALLBACK one additional time with a block_symbol
2517 that has a valid block but a NULL symbol. */
2519 bool iterate_over_symbols_terminated
2520 (const struct block
*block
,
2521 const lookup_name_info
&name
,
2522 const domain_enum domain
,
2523 gdb::function_view
<symbol_found_callback_ftype
> callback
);
2525 /* Storage type used by demangle_for_lookup. demangle_for_lookup
2526 either returns a const char * pointer that points to either of the
2527 fields of this type, or a pointer to the input NAME. This is done
2528 this way to avoid depending on the precise details of the storage
2530 class demangle_result_storage
2534 /* Swap the malloc storage to STR, and return a pointer to the
2535 beginning of the new string. */
2536 const char *set_malloc_ptr (gdb::unique_xmalloc_ptr
<char> &&str
)
2538 m_malloc
= std::move (str
);
2539 return m_malloc
.get ();
2542 /* Set the malloc storage to now point at PTR. Any previous malloc
2543 storage is released. */
2544 const char *set_malloc_ptr (char *ptr
)
2546 m_malloc
.reset (ptr
);
2553 gdb::unique_xmalloc_ptr
<char> m_malloc
;
2557 demangle_for_lookup (const char *name
, enum language lang
,
2558 demangle_result_storage
&storage
);
2560 /* Test to see if the symbol of language SYMBOL_LANGUAGE specified by
2561 SYMNAME (which is already demangled for C++ symbols) matches
2562 SYM_TEXT in the first SYM_TEXT_LEN characters. If so, add it to
2563 the current completion list and return true. Otherwise, return
2565 bool completion_list_add_name (completion_tracker
&tracker
,
2566 language symbol_language
,
2567 const char *symname
,
2568 const lookup_name_info
&lookup_name
,
2569 const char *text
, const char *word
);
2571 /* A simple symbol searching class. */
2573 class symbol_searcher
2576 /* Returns the symbols found for the search. */
2577 const std::vector
<block_symbol
> &
2578 matching_symbols () const
2583 /* Returns the minimal symbols found for the search. */
2584 const std::vector
<bound_minimal_symbol
> &
2585 matching_msymbols () const
2587 return m_minimal_symbols
;
2590 /* Search for all symbols named NAME in LANGUAGE with DOMAIN, restricting
2591 search to FILE_SYMTABS and SEARCH_PSPACE, both of which may be NULL
2592 to search all symtabs and program spaces. */
2593 void find_all_symbols (const std::string
&name
,
2594 const struct language_defn
*language
,
2595 enum search_domain search_domain
,
2596 std::vector
<symtab
*> *search_symtabs
,
2597 struct program_space
*search_pspace
);
2599 /* Reset this object to perform another search. */
2603 m_minimal_symbols
.clear ();
2607 /* Matching debug symbols. */
2608 std::vector
<block_symbol
> m_symbols
;
2610 /* Matching non-debug symbols. */
2611 std::vector
<bound_minimal_symbol
> m_minimal_symbols
;
2614 /* Class used to encapsulate the filename filtering for the "info sources"
2617 struct info_sources_filter
2619 /* If filename filtering is being used (see M_C_REGEXP) then which part
2620 of the filename is being filtered against? */
2623 /* Match against the full filename. */
2626 /* Match only against the directory part of the full filename. */
2629 /* Match only against the basename part of the full filename. */
2633 /* Create a filter of MATCH_TYPE using regular expression REGEXP. If
2634 REGEXP is nullptr then all files will match the filter and MATCH_TYPE
2637 The string pointed too by REGEXP must remain live and unchanged for
2638 this lifetime of this object as the object only retains a copy of the
2640 info_sources_filter (match_on match_type
, const char *regexp
);
2642 DISABLE_COPY_AND_ASSIGN (info_sources_filter
);
2644 /* Does FULLNAME match the filter defined by this object, return true if
2645 it does, otherwise, return false. If there is no filtering defined
2646 then this function will always return true. */
2647 bool matches (const char *fullname
) const;
2651 /* The type of filtering in place. */
2652 match_on m_match_type
;
2654 /* Points to the original regexp used to create this filter. */
2655 const char *m_regexp
;
2657 /* A compiled version of M_REGEXP. This object is only given a value if
2658 M_REGEXP is not nullptr and is not the empty string. */
2659 gdb::optional
<compiled_regex
> m_c_regexp
;
2662 /* Perform the core of the 'info sources' command.
2664 FILTER is used to perform regular expression based filtering on the
2665 source files that will be displayed.
2667 Output is written to UIOUT in CLI or MI style as appropriate. */
2669 extern void info_sources_worker (struct ui_out
*uiout
,
2670 bool group_by_objfile
,
2671 const info_sources_filter
&filter
);
2673 #endif /* !defined(SYMTAB_H) */