1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2019 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/>. */
30 #include "gdb_regex.h"
31 #include "expression.h"
36 #include "filenames.h" /* for FILENAME_CMP */
37 #include "objc-lang.h"
43 #include "cli/cli-utils.h"
44 #include "cli/cli-style.h"
47 #include "typeprint.h"
49 #include "gdb_obstack.h"
51 #include "dictionary.h"
53 #include <sys/types.h>
58 #include "cp-support.h"
59 #include "observable.h"
62 #include "macroscope.h"
64 #include "parser-defs.h"
65 #include "completer.h"
66 #include "progspace-and-thread.h"
67 #include "gdbsupport/gdb_optional.h"
68 #include "filename-seen-cache.h"
69 #include "arch-utils.h"
71 #include "gdbsupport/gdb_string_view.h"
72 #include "gdbsupport/pathstuff.h"
73 #include "gdbsupport/common-utils.h"
75 /* Forward declarations for local functions. */
77 static void rbreak_command (const char *, int);
79 static int find_line_common (struct linetable
*, int, int *, int);
81 static struct block_symbol
82 lookup_symbol_aux (const char *name
,
83 symbol_name_match_type match_type
,
84 const struct block
*block
,
85 const domain_enum domain
,
86 enum language language
,
87 struct field_of_this_result
*);
90 struct block_symbol
lookup_local_symbol (const char *name
,
91 symbol_name_match_type match_type
,
92 const struct block
*block
,
93 const domain_enum domain
,
94 enum language language
);
96 static struct block_symbol
97 lookup_symbol_in_objfile (struct objfile
*objfile
,
98 enum block_enum block_index
,
99 const char *name
, const domain_enum domain
);
101 /* Type of the data stored on the program space. */
105 main_info () = default;
109 xfree (name_of_main
);
112 /* Name of "main". */
114 char *name_of_main
= nullptr;
116 /* Language of "main". */
118 enum language language_of_main
= language_unknown
;
121 /* Program space key for finding name and language of "main". */
123 static const program_space_key
<main_info
> main_progspace_key
;
125 /* The default symbol cache size.
126 There is no extra cpu cost for large N (except when flushing the cache,
127 which is rare). The value here is just a first attempt. A better default
128 value may be higher or lower. A prime number can make up for a bad hash
129 computation, so that's why the number is what it is. */
130 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
132 /* The maximum symbol cache size.
133 There's no method to the decision of what value to use here, other than
134 there's no point in allowing a user typo to make gdb consume all memory. */
135 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
137 /* symbol_cache_lookup returns this if a previous lookup failed to find the
138 symbol in any objfile. */
139 #define SYMBOL_LOOKUP_FAILED \
140 ((struct block_symbol) {(struct symbol *) 1, NULL})
141 #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)
143 /* Recording lookups that don't find the symbol is just as important, if not
144 more so, than recording found symbols. */
146 enum symbol_cache_slot_state
149 SYMBOL_SLOT_NOT_FOUND
,
153 struct symbol_cache_slot
155 enum symbol_cache_slot_state state
;
157 /* The objfile that was current when the symbol was looked up.
158 This is only needed for global blocks, but for simplicity's sake
159 we allocate the space for both. If data shows the extra space used
160 for static blocks is a problem, we can split things up then.
162 Global blocks need cache lookup to include the objfile context because
163 we need to account for gdbarch_iterate_over_objfiles_in_search_order
164 which can traverse objfiles in, effectively, any order, depending on
165 the current objfile, thus affecting which symbol is found. Normally,
166 only the current objfile is searched first, and then the rest are
167 searched in recorded order; but putting cache lookup inside
168 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
169 Instead we just make the current objfile part of the context of
170 cache lookup. This means we can record the same symbol multiple times,
171 each with a different "current objfile" that was in effect when the
172 lookup was saved in the cache, but cache space is pretty cheap. */
173 const struct objfile
*objfile_context
;
177 struct block_symbol found
;
186 /* Symbols don't specify global vs static block.
187 So keep them in separate caches. */
189 struct block_symbol_cache
193 unsigned int collisions
;
195 /* SYMBOLS is a variable length array of this size.
196 One can imagine that in general one cache (global/static) should be a
197 fraction of the size of the other, but there's no data at the moment
198 on which to decide. */
201 struct symbol_cache_slot symbols
[1];
206 Searching for symbols in the static and global blocks over multiple objfiles
207 again and again can be slow, as can searching very big objfiles. This is a
208 simple cache to improve symbol lookup performance, which is critical to
209 overall gdb performance.
211 Symbols are hashed on the name, its domain, and block.
212 They are also hashed on their objfile for objfile-specific lookups. */
216 symbol_cache () = default;
220 xfree (global_symbols
);
221 xfree (static_symbols
);
224 struct block_symbol_cache
*global_symbols
= nullptr;
225 struct block_symbol_cache
*static_symbols
= nullptr;
228 /* Program space key for finding its symbol cache. */
230 static const program_space_key
<symbol_cache
> symbol_cache_key
;
232 /* When non-zero, print debugging messages related to symtab creation. */
233 unsigned int symtab_create_debug
= 0;
235 /* When non-zero, print debugging messages related to symbol lookup. */
236 unsigned int symbol_lookup_debug
= 0;
238 /* The size of the cache is staged here. */
239 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
241 /* The current value of the symbol cache size.
242 This is saved so that if the user enters a value too big we can restore
243 the original value from here. */
244 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
246 /* True if a file may be known by two different basenames.
247 This is the uncommon case, and significantly slows down gdb.
248 Default set to "off" to not slow down the common case. */
249 bool basenames_may_differ
= false;
251 /* Allow the user to configure the debugger behavior with respect
252 to multiple-choice menus when more than one symbol matches during
255 const char multiple_symbols_ask
[] = "ask";
256 const char multiple_symbols_all
[] = "all";
257 const char multiple_symbols_cancel
[] = "cancel";
258 static const char *const multiple_symbols_modes
[] =
260 multiple_symbols_ask
,
261 multiple_symbols_all
,
262 multiple_symbols_cancel
,
265 static const char *multiple_symbols_mode
= multiple_symbols_all
;
267 /* Read-only accessor to AUTO_SELECT_MODE. */
270 multiple_symbols_select_mode (void)
272 return multiple_symbols_mode
;
275 /* Return the name of a domain_enum. */
278 domain_name (domain_enum e
)
282 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
283 case VAR_DOMAIN
: return "VAR_DOMAIN";
284 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
285 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
286 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
287 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
288 default: gdb_assert_not_reached ("bad domain_enum");
292 /* Return the name of a search_domain . */
295 search_domain_name (enum search_domain e
)
299 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
300 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
301 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
302 case ALL_DOMAIN
: return "ALL_DOMAIN";
303 default: gdb_assert_not_reached ("bad search_domain");
310 compunit_primary_filetab (const struct compunit_symtab
*cust
)
312 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
314 /* The primary file symtab is the first one in the list. */
315 return COMPUNIT_FILETABS (cust
);
321 compunit_language (const struct compunit_symtab
*cust
)
323 struct symtab
*symtab
= compunit_primary_filetab (cust
);
325 /* The language of the compunit symtab is the language of its primary
327 return SYMTAB_LANGUAGE (symtab
);
333 minimal_symbol::data_p () const
335 return type
== mst_data
338 || type
== mst_file_data
339 || type
== mst_file_bss
;
345 minimal_symbol::text_p () const
347 return type
== mst_text
348 || type
== mst_text_gnu_ifunc
349 || type
== mst_data_gnu_ifunc
350 || type
== mst_slot_got_plt
351 || type
== mst_solib_trampoline
352 || type
== mst_file_text
;
355 /* See whether FILENAME matches SEARCH_NAME using the rule that we
356 advertise to the user. (The manual's description of linespecs
357 describes what we advertise). Returns true if they match, false
361 compare_filenames_for_search (const char *filename
, const char *search_name
)
363 int len
= strlen (filename
);
364 size_t search_len
= strlen (search_name
);
366 if (len
< search_len
)
369 /* The tail of FILENAME must match. */
370 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
373 /* Either the names must completely match, or the character
374 preceding the trailing SEARCH_NAME segment of FILENAME must be a
377 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
378 cannot match FILENAME "/path//dir/file.c" - as user has requested
379 absolute path. The sama applies for "c:\file.c" possibly
380 incorrectly hypothetically matching "d:\dir\c:\file.c".
382 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
383 compatible with SEARCH_NAME "file.c". In such case a compiler had
384 to put the "c:file.c" name into debug info. Such compatibility
385 works only on GDB built for DOS host. */
386 return (len
== search_len
387 || (!IS_ABSOLUTE_PATH (search_name
)
388 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
389 || (HAS_DRIVE_SPEC (filename
)
390 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
393 /* Same as compare_filenames_for_search, but for glob-style patterns.
394 Heads up on the order of the arguments. They match the order of
395 compare_filenames_for_search, but it's the opposite of the order of
396 arguments to gdb_filename_fnmatch. */
399 compare_glob_filenames_for_search (const char *filename
,
400 const char *search_name
)
402 /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
403 all /s have to be explicitly specified. */
404 int file_path_elements
= count_path_elements (filename
);
405 int search_path_elements
= count_path_elements (search_name
);
407 if (search_path_elements
> file_path_elements
)
410 if (IS_ABSOLUTE_PATH (search_name
))
412 return (search_path_elements
== file_path_elements
413 && gdb_filename_fnmatch (search_name
, filename
,
414 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0);
418 const char *file_to_compare
419 = strip_leading_path_elements (filename
,
420 file_path_elements
- search_path_elements
);
422 return gdb_filename_fnmatch (search_name
, file_to_compare
,
423 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0;
427 /* Check for a symtab of a specific name by searching some symtabs.
428 This is a helper function for callbacks of iterate_over_symtabs.
430 If NAME is not absolute, then REAL_PATH is NULL
431 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
433 The return value, NAME, REAL_PATH and CALLBACK are identical to the
434 `map_symtabs_matching_filename' method of quick_symbol_functions.
436 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
437 Each symtab within the specified compunit symtab is also searched.
438 AFTER_LAST is one past the last compunit symtab to search; NULL means to
439 search until the end of the list. */
442 iterate_over_some_symtabs (const char *name
,
443 const char *real_path
,
444 struct compunit_symtab
*first
,
445 struct compunit_symtab
*after_last
,
446 gdb::function_view
<bool (symtab
*)> callback
)
448 struct compunit_symtab
*cust
;
449 const char* base_name
= lbasename (name
);
451 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
453 for (symtab
*s
: compunit_filetabs (cust
))
455 if (compare_filenames_for_search (s
->filename
, name
))
462 /* Before we invoke realpath, which can get expensive when many
463 files are involved, do a quick comparison of the basenames. */
464 if (! basenames_may_differ
465 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
468 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
475 /* If the user gave us an absolute path, try to find the file in
476 this symtab and use its absolute path. */
477 if (real_path
!= NULL
)
479 const char *fullname
= symtab_to_fullname (s
);
481 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
482 gdb_assert (IS_ABSOLUTE_PATH (name
));
483 gdb::unique_xmalloc_ptr
<char> fullname_real_path
484 = gdb_realpath (fullname
);
485 fullname
= fullname_real_path
.get ();
486 if (FILENAME_CMP (real_path
, fullname
) == 0)
499 /* Check for a symtab of a specific name; first in symtabs, then in
500 psymtabs. *If* there is no '/' in the name, a match after a '/'
501 in the symtab filename will also work.
503 Calls CALLBACK with each symtab that is found. If CALLBACK returns
504 true, the search stops. */
507 iterate_over_symtabs (const char *name
,
508 gdb::function_view
<bool (symtab
*)> callback
)
510 gdb::unique_xmalloc_ptr
<char> real_path
;
512 /* Here we are interested in canonicalizing an absolute path, not
513 absolutizing a relative path. */
514 if (IS_ABSOLUTE_PATH (name
))
516 real_path
= gdb_realpath (name
);
517 gdb_assert (IS_ABSOLUTE_PATH (real_path
.get ()));
520 for (objfile
*objfile
: current_program_space
->objfiles ())
522 if (iterate_over_some_symtabs (name
, real_path
.get (),
523 objfile
->compunit_symtabs
, NULL
,
528 /* Same search rules as above apply here, but now we look thru the
531 for (objfile
*objfile
: current_program_space
->objfiles ())
534 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
542 /* A wrapper for iterate_over_symtabs that returns the first matching
546 lookup_symtab (const char *name
)
548 struct symtab
*result
= NULL
;
550 iterate_over_symtabs (name
, [&] (symtab
*symtab
)
560 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
561 full method name, which consist of the class name (from T), the unadorned
562 method name from METHOD_ID, and the signature for the specific overload,
563 specified by SIGNATURE_ID. Note that this function is g++ specific. */
566 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
568 int mangled_name_len
;
570 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
571 struct fn_field
*method
= &f
[signature_id
];
572 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
573 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
574 const char *newname
= TYPE_NAME (type
);
576 /* Does the form of physname indicate that it is the full mangled name
577 of a constructor (not just the args)? */
578 int is_full_physname_constructor
;
581 int is_destructor
= is_destructor_name (physname
);
582 /* Need a new type prefix. */
583 const char *const_prefix
= method
->is_const
? "C" : "";
584 const char *volatile_prefix
= method
->is_volatile
? "V" : "";
586 int len
= (newname
== NULL
? 0 : strlen (newname
));
588 /* Nothing to do if physname already contains a fully mangled v3 abi name
589 or an operator name. */
590 if ((physname
[0] == '_' && physname
[1] == 'Z')
591 || is_operator_name (field_name
))
592 return xstrdup (physname
);
594 is_full_physname_constructor
= is_constructor_name (physname
);
596 is_constructor
= is_full_physname_constructor
597 || (newname
&& strcmp (field_name
, newname
) == 0);
600 is_destructor
= (startswith (physname
, "__dt"));
602 if (is_destructor
|| is_full_physname_constructor
)
604 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
605 strcpy (mangled_name
, physname
);
611 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
613 else if (physname
[0] == 't' || physname
[0] == 'Q')
615 /* The physname for template and qualified methods already includes
617 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
623 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
624 volatile_prefix
, len
);
626 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
627 + strlen (buf
) + len
+ strlen (physname
) + 1);
629 mangled_name
= (char *) xmalloc (mangled_name_len
);
631 mangled_name
[0] = '\0';
633 strcpy (mangled_name
, field_name
);
635 strcat (mangled_name
, buf
);
636 /* If the class doesn't have a name, i.e. newname NULL, then we just
637 mangle it using 0 for the length of the class. Thus it gets mangled
638 as something starting with `::' rather than `classname::'. */
640 strcat (mangled_name
, newname
);
642 strcat (mangled_name
, physname
);
643 return (mangled_name
);
646 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
647 correctly allocated. */
650 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
652 struct obstack
*obstack
)
654 if (gsymbol
->language
== language_ada
)
658 gsymbol
->ada_mangled
= 0;
659 gsymbol
->language_specific
.obstack
= obstack
;
663 gsymbol
->ada_mangled
= 1;
664 gsymbol
->language_specific
.demangled_name
= name
;
668 gsymbol
->language_specific
.demangled_name
= name
;
671 /* Return the demangled name of GSYMBOL. */
674 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
676 if (gsymbol
->language
== language_ada
)
678 if (!gsymbol
->ada_mangled
)
683 return gsymbol
->language_specific
.demangled_name
;
687 /* Initialize the language dependent portion of a symbol
688 depending upon the language for the symbol. */
691 symbol_set_language (struct general_symbol_info
*gsymbol
,
692 enum language language
,
693 struct obstack
*obstack
)
695 gsymbol
->language
= language
;
696 if (gsymbol
->language
== language_cplus
697 || gsymbol
->language
== language_d
698 || gsymbol
->language
== language_go
699 || gsymbol
->language
== language_objc
700 || gsymbol
->language
== language_fortran
)
702 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
704 else if (gsymbol
->language
== language_ada
)
706 gdb_assert (gsymbol
->ada_mangled
== 0);
707 gsymbol
->language_specific
.obstack
= obstack
;
711 memset (&gsymbol
->language_specific
, 0,
712 sizeof (gsymbol
->language_specific
));
716 /* Functions to initialize a symbol's mangled name. */
718 /* Objects of this type are stored in the demangled name hash table. */
719 struct demangled_name_entry
721 demangled_name_entry (gdb::string_view mangled_name
)
722 : mangled (mangled_name
) {}
724 gdb::string_view mangled
;
725 enum language language
;
729 /* Hash function for the demangled name hash. */
732 hash_demangled_name_entry (const void *data
)
734 const struct demangled_name_entry
*e
735 = (const struct demangled_name_entry
*) data
;
737 return fast_hash (e
->mangled
.data (), e
->mangled
.length ());
740 /* Equality function for the demangled name hash. */
743 eq_demangled_name_entry (const void *a
, const void *b
)
745 const struct demangled_name_entry
*da
746 = (const struct demangled_name_entry
*) a
;
747 const struct demangled_name_entry
*db
748 = (const struct demangled_name_entry
*) b
;
750 return da
->mangled
== db
->mangled
;
754 free_demangled_name_entry (void *data
)
756 struct demangled_name_entry
*e
757 = (struct demangled_name_entry
*) data
;
759 e
->~demangled_name_entry();
762 /* Create the hash table used for demangled names. Each hash entry is
763 a pair of strings; one for the mangled name and one for the demangled
764 name. The entry is hashed via just the mangled name. */
767 create_demangled_names_hash (struct objfile_per_bfd_storage
*per_bfd
)
769 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
770 The hash table code will round this up to the next prime number.
771 Choosing a much larger table size wastes memory, and saves only about
772 1% in symbol reading. */
774 per_bfd
->demangled_names_hash
.reset (htab_create_alloc
775 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
776 free_demangled_name_entry
, xcalloc
, xfree
));
779 /* Try to determine the demangled name for a symbol, based on the
780 language of that symbol. If the language is set to language_auto,
781 it will attempt to find any demangling algorithm that works and
782 then set the language appropriately. The returned name is allocated
783 by the demangler and should be xfree'd. */
786 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
789 char *demangled
= NULL
;
792 if (gsymbol
->language
== language_unknown
)
793 gsymbol
->language
= language_auto
;
795 if (gsymbol
->language
!= language_auto
)
797 const struct language_defn
*lang
= language_def (gsymbol
->language
);
799 language_sniff_from_mangled_name (lang
, mangled
, &demangled
);
803 for (i
= language_unknown
; i
< nr_languages
; ++i
)
805 enum language l
= (enum language
) i
;
806 const struct language_defn
*lang
= language_def (l
);
808 if (language_sniff_from_mangled_name (lang
, mangled
, &demangled
))
810 gsymbol
->language
= l
;
818 /* Set both the mangled and demangled (if any) names for GSYMBOL based
819 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
820 objfile's obstack; but if COPY_NAME is 0 and if NAME is
821 NUL-terminated, then this function assumes that NAME is already
822 correctly saved (either permanently or with a lifetime tied to the
823 objfile), and it will not be copied.
825 The hash table corresponding to OBJFILE is used, and the memory
826 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
827 so the pointer can be discarded after calling this function. */
830 symbol_set_names (struct general_symbol_info
*gsymbol
,
831 const char *linkage_name
, int len
, bool copy_name
,
832 struct objfile_per_bfd_storage
*per_bfd
)
834 struct demangled_name_entry
**slot
;
835 /* A 0-terminated copy of the linkage name. */
836 const char *linkage_name_copy
;
838 if (gsymbol
->language
== language_ada
)
840 /* In Ada, we do the symbol lookups using the mangled name, so
841 we can save some space by not storing the demangled name. */
843 gsymbol
->name
= linkage_name
;
846 char *name
= (char *) obstack_alloc (&per_bfd
->storage_obstack
,
849 memcpy (name
, linkage_name
, len
);
851 gsymbol
->name
= name
;
853 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
858 if (per_bfd
->demangled_names_hash
== NULL
)
859 create_demangled_names_hash (per_bfd
);
861 if (linkage_name
[len
] != '\0')
865 alloc_name
= (char *) alloca (len
+ 1);
866 memcpy (alloc_name
, linkage_name
, len
);
867 alloc_name
[len
] = '\0';
869 linkage_name_copy
= alloc_name
;
872 linkage_name_copy
= linkage_name
;
874 struct demangled_name_entry
entry (gdb::string_view (linkage_name_copy
, len
));
875 slot
= ((struct demangled_name_entry
**)
876 htab_find_slot (per_bfd
->demangled_names_hash
.get (),
879 /* If this name is not in the hash table, add it. */
881 /* A C version of the symbol may have already snuck into the table.
882 This happens to, e.g., main.init (__go_init_main). Cope. */
883 || (gsymbol
->language
== language_go
884 && (*slot
)->demangled
[0] == '\0'))
886 char *demangled_name_ptr
887 = symbol_find_demangled_name (gsymbol
, linkage_name_copy
);
888 gdb::unique_xmalloc_ptr
<char> demangled_name (demangled_name_ptr
);
889 int demangled_len
= demangled_name
? strlen (demangled_name
.get ()) : 0;
891 /* Suppose we have demangled_name==NULL, copy_name==0, and
892 linkage_name_copy==linkage_name. In this case, we already have the
893 mangled name saved, and we don't have a demangled name. So,
894 you might think we could save a little space by not recording
895 this in the hash table at all.
897 It turns out that it is actually important to still save such
898 an entry in the hash table, because storing this name gives
899 us better bcache hit rates for partial symbols. */
900 if (!copy_name
&& linkage_name_copy
== linkage_name
)
903 = ((struct demangled_name_entry
*)
904 obstack_alloc (&per_bfd
->storage_obstack
,
905 offsetof (struct demangled_name_entry
, demangled
)
906 + demangled_len
+ 1));
907 new (*slot
) demangled_name_entry
908 (gdb::string_view (linkage_name
, len
));
914 /* If we must copy the mangled name, put it directly after
915 the demangled name so we can have a single
918 = ((struct demangled_name_entry
*)
919 obstack_alloc (&per_bfd
->storage_obstack
,
920 offsetof (struct demangled_name_entry
, demangled
)
921 + len
+ demangled_len
+ 2));
922 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
923 strcpy (mangled_ptr
, linkage_name_copy
);
924 new (*slot
) demangled_name_entry
925 (gdb::string_view (mangled_ptr
, len
));
927 (*slot
)->language
= gsymbol
->language
;
929 if (demangled_name
!= NULL
)
930 strcpy ((*slot
)->demangled
, demangled_name
.get ());
932 (*slot
)->demangled
[0] = '\0';
934 else if (gsymbol
->language
== language_unknown
935 || gsymbol
->language
== language_auto
)
936 gsymbol
->language
= (*slot
)->language
;
938 gsymbol
->name
= (*slot
)->mangled
.data ();
939 if ((*slot
)->demangled
[0] != '\0')
940 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
941 &per_bfd
->storage_obstack
);
943 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
946 /* Return the source code name of a symbol. In languages where
947 demangling is necessary, this is the demangled name. */
950 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
952 switch (gsymbol
->language
)
958 case language_fortran
:
959 if (symbol_get_demangled_name (gsymbol
) != NULL
)
960 return symbol_get_demangled_name (gsymbol
);
963 return ada_decode_symbol (gsymbol
);
967 return gsymbol
->name
;
970 /* Return the demangled name for a symbol based on the language for
971 that symbol. If no demangled name exists, return NULL. */
974 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
976 const char *dem_name
= NULL
;
978 switch (gsymbol
->language
)
984 case language_fortran
:
985 dem_name
= symbol_get_demangled_name (gsymbol
);
988 dem_name
= ada_decode_symbol (gsymbol
);
996 /* Return the search name of a symbol---generally the demangled or
997 linkage name of the symbol, depending on how it will be searched for.
998 If there is no distinct demangled name, then returns the same value
999 (same pointer) as SYMBOL_LINKAGE_NAME. */
1002 symbol_search_name (const struct general_symbol_info
*gsymbol
)
1004 if (gsymbol
->language
== language_ada
)
1005 return gsymbol
->name
;
1007 return symbol_natural_name (gsymbol
);
1013 symbol_matches_search_name (const struct general_symbol_info
*gsymbol
,
1014 const lookup_name_info
&name
)
1016 symbol_name_matcher_ftype
*name_match
1017 = get_symbol_name_matcher (language_def (gsymbol
->language
), name
);
1018 return name_match (symbol_search_name (gsymbol
), name
, NULL
);
1023 /* Return true if the two sections are the same, or if they could
1024 plausibly be copies of each other, one in an original object
1025 file and another in a separated debug file. */
1028 matching_obj_sections (struct obj_section
*obj_first
,
1029 struct obj_section
*obj_second
)
1031 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
1032 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1034 /* If they're the same section, then they match. */
1035 if (first
== second
)
1038 /* If either is NULL, give up. */
1039 if (first
== NULL
|| second
== NULL
)
1042 /* This doesn't apply to absolute symbols. */
1043 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1046 /* If they're in the same object file, they must be different sections. */
1047 if (first
->owner
== second
->owner
)
1050 /* Check whether the two sections are potentially corresponding. They must
1051 have the same size, address, and name. We can't compare section indexes,
1052 which would be more reliable, because some sections may have been
1054 if (bfd_section_size (first
) != bfd_section_size (second
))
1057 /* In-memory addresses may start at a different offset, relativize them. */
1058 if (bfd_section_vma (first
) - bfd_get_start_address (first
->owner
)
1059 != bfd_section_vma (second
) - bfd_get_start_address (second
->owner
))
1062 if (bfd_section_name (first
) == NULL
1063 || bfd_section_name (second
) == NULL
1064 || strcmp (bfd_section_name (first
), bfd_section_name (second
)) != 0)
1067 /* Otherwise check that they are in corresponding objfiles. */
1069 struct objfile
*obj
= NULL
;
1070 for (objfile
*objfile
: current_program_space
->objfiles ())
1071 if (objfile
->obfd
== first
->owner
)
1076 gdb_assert (obj
!= NULL
);
1078 if (obj
->separate_debug_objfile
!= NULL
1079 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1081 if (obj
->separate_debug_objfile_backlink
!= NULL
1082 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1091 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1093 struct bound_minimal_symbol msymbol
;
1095 /* If we know that this is not a text address, return failure. This is
1096 necessary because we loop based on texthigh and textlow, which do
1097 not include the data ranges. */
1098 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1099 if (msymbol
.minsym
&& msymbol
.minsym
->data_p ())
1102 for (objfile
*objfile
: current_program_space
->objfiles ())
1104 struct compunit_symtab
*cust
= NULL
;
1107 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1114 /* Hash function for the symbol cache. */
1117 hash_symbol_entry (const struct objfile
*objfile_context
,
1118 const char *name
, domain_enum domain
)
1120 unsigned int hash
= (uintptr_t) objfile_context
;
1123 hash
+= htab_hash_string (name
);
1125 /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
1126 to map to the same slot. */
1127 if (domain
== STRUCT_DOMAIN
)
1128 hash
+= VAR_DOMAIN
* 7;
1135 /* Equality function for the symbol cache. */
1138 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1139 const struct objfile
*objfile_context
,
1140 const char *name
, domain_enum domain
)
1142 const char *slot_name
;
1143 domain_enum slot_domain
;
1145 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1148 if (slot
->objfile_context
!= objfile_context
)
1151 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1153 slot_name
= slot
->value
.not_found
.name
;
1154 slot_domain
= slot
->value
.not_found
.domain
;
1158 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
.symbol
);
1159 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
.symbol
);
1162 /* NULL names match. */
1163 if (slot_name
== NULL
&& name
== NULL
)
1165 /* But there's no point in calling symbol_matches_domain in the
1166 SYMBOL_SLOT_FOUND case. */
1167 if (slot_domain
!= domain
)
1170 else if (slot_name
!= NULL
&& name
!= NULL
)
1172 /* It's important that we use the same comparison that was done
1173 the first time through. If the slot records a found symbol,
1174 then this means using the symbol name comparison function of
1175 the symbol's language with SYMBOL_SEARCH_NAME. See
1176 dictionary.c. It also means using symbol_matches_domain for
1177 found symbols. See block.c.
1179 If the slot records a not-found symbol, then require a precise match.
1180 We could still be lax with whitespace like strcmp_iw though. */
1182 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1184 if (strcmp (slot_name
, name
) != 0)
1186 if (slot_domain
!= domain
)
1191 struct symbol
*sym
= slot
->value
.found
.symbol
;
1192 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
1194 if (!SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
1197 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1198 slot_domain
, domain
))
1204 /* Only one name is NULL. */
1211 /* Given a cache of size SIZE, return the size of the struct (with variable
1212 length array) in bytes. */
1215 symbol_cache_byte_size (unsigned int size
)
1217 return (sizeof (struct block_symbol_cache
)
1218 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1224 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1226 /* If there's no change in size, don't do anything.
1227 All caches have the same size, so we can just compare with the size
1228 of the global symbols cache. */
1229 if ((cache
->global_symbols
!= NULL
1230 && cache
->global_symbols
->size
== new_size
)
1231 || (cache
->global_symbols
== NULL
1235 xfree (cache
->global_symbols
);
1236 xfree (cache
->static_symbols
);
1240 cache
->global_symbols
= NULL
;
1241 cache
->static_symbols
= NULL
;
1245 size_t total_size
= symbol_cache_byte_size (new_size
);
1247 cache
->global_symbols
1248 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1249 cache
->static_symbols
1250 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1251 cache
->global_symbols
->size
= new_size
;
1252 cache
->static_symbols
->size
= new_size
;
1256 /* Return the symbol cache of PSPACE.
1257 Create one if it doesn't exist yet. */
1259 static struct symbol_cache
*
1260 get_symbol_cache (struct program_space
*pspace
)
1262 struct symbol_cache
*cache
= symbol_cache_key
.get (pspace
);
1266 cache
= symbol_cache_key
.emplace (pspace
);
1267 resize_symbol_cache (cache
, symbol_cache_size
);
1273 /* Set the size of the symbol cache in all program spaces. */
1276 set_symbol_cache_size (unsigned int new_size
)
1278 struct program_space
*pspace
;
1280 ALL_PSPACES (pspace
)
1282 struct symbol_cache
*cache
= symbol_cache_key
.get (pspace
);
1284 /* The pspace could have been created but not have a cache yet. */
1286 resize_symbol_cache (cache
, new_size
);
1290 /* Called when symbol-cache-size is set. */
1293 set_symbol_cache_size_handler (const char *args
, int from_tty
,
1294 struct cmd_list_element
*c
)
1296 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1298 /* Restore the previous value.
1299 This is the value the "show" command prints. */
1300 new_symbol_cache_size
= symbol_cache_size
;
1302 error (_("Symbol cache size is too large, max is %u."),
1303 MAX_SYMBOL_CACHE_SIZE
);
1305 symbol_cache_size
= new_symbol_cache_size
;
1307 set_symbol_cache_size (symbol_cache_size
);
1310 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1311 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1312 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1313 failed (and thus this one will too), or NULL if the symbol is not present
1315 *BSC_PTR and *SLOT_PTR are set to the cache and slot of the symbol, which
1316 can be used to save the result of a full lookup attempt. */
1318 static struct block_symbol
1319 symbol_cache_lookup (struct symbol_cache
*cache
,
1320 struct objfile
*objfile_context
, enum block_enum block
,
1321 const char *name
, domain_enum domain
,
1322 struct block_symbol_cache
**bsc_ptr
,
1323 struct symbol_cache_slot
**slot_ptr
)
1325 struct block_symbol_cache
*bsc
;
1327 struct symbol_cache_slot
*slot
;
1329 if (block
== GLOBAL_BLOCK
)
1330 bsc
= cache
->global_symbols
;
1332 bsc
= cache
->static_symbols
;
1340 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1341 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1346 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1348 if (symbol_lookup_debug
)
1349 fprintf_unfiltered (gdb_stdlog
,
1350 "%s block symbol cache hit%s for %s, %s\n",
1351 block
== GLOBAL_BLOCK
? "Global" : "Static",
1352 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1353 ? " (not found)" : "",
1354 name
, domain_name (domain
));
1356 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1357 return SYMBOL_LOOKUP_FAILED
;
1358 return slot
->value
.found
;
1361 /* Symbol is not present in the cache. */
1363 if (symbol_lookup_debug
)
1365 fprintf_unfiltered (gdb_stdlog
,
1366 "%s block symbol cache miss for %s, %s\n",
1367 block
== GLOBAL_BLOCK
? "Global" : "Static",
1368 name
, domain_name (domain
));
1374 /* Clear out SLOT. */
1377 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1379 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1380 xfree (slot
->value
.not_found
.name
);
1381 slot
->state
= SYMBOL_SLOT_UNUSED
;
1384 /* Mark SYMBOL as found in SLOT.
1385 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1386 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1387 necessarily the objfile the symbol was found in. */
1390 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1391 struct symbol_cache_slot
*slot
,
1392 struct objfile
*objfile_context
,
1393 struct symbol
*symbol
,
1394 const struct block
*block
)
1398 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1401 symbol_cache_clear_slot (slot
);
1403 slot
->state
= SYMBOL_SLOT_FOUND
;
1404 slot
->objfile_context
= objfile_context
;
1405 slot
->value
.found
.symbol
= symbol
;
1406 slot
->value
.found
.block
= block
;
1409 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1410 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1411 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1414 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1415 struct symbol_cache_slot
*slot
,
1416 struct objfile
*objfile_context
,
1417 const char *name
, domain_enum domain
)
1421 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1424 symbol_cache_clear_slot (slot
);
1426 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1427 slot
->objfile_context
= objfile_context
;
1428 slot
->value
.not_found
.name
= xstrdup (name
);
1429 slot
->value
.not_found
.domain
= domain
;
1432 /* Flush the symbol cache of PSPACE. */
1435 symbol_cache_flush (struct program_space
*pspace
)
1437 struct symbol_cache
*cache
= symbol_cache_key
.get (pspace
);
1442 if (cache
->global_symbols
== NULL
)
1444 gdb_assert (symbol_cache_size
== 0);
1445 gdb_assert (cache
->static_symbols
== NULL
);
1449 /* If the cache is untouched since the last flush, early exit.
1450 This is important for performance during the startup of a program linked
1451 with 100s (or 1000s) of shared libraries. */
1452 if (cache
->global_symbols
->misses
== 0
1453 && cache
->static_symbols
->misses
== 0)
1456 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1457 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1459 for (pass
= 0; pass
< 2; ++pass
)
1461 struct block_symbol_cache
*bsc
1462 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1465 for (i
= 0; i
< bsc
->size
; ++i
)
1466 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1469 cache
->global_symbols
->hits
= 0;
1470 cache
->global_symbols
->misses
= 0;
1471 cache
->global_symbols
->collisions
= 0;
1472 cache
->static_symbols
->hits
= 0;
1473 cache
->static_symbols
->misses
= 0;
1474 cache
->static_symbols
->collisions
= 0;
1480 symbol_cache_dump (const struct symbol_cache
*cache
)
1484 if (cache
->global_symbols
== NULL
)
1486 printf_filtered (" <disabled>\n");
1490 for (pass
= 0; pass
< 2; ++pass
)
1492 const struct block_symbol_cache
*bsc
1493 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1497 printf_filtered ("Global symbols:\n");
1499 printf_filtered ("Static symbols:\n");
1501 for (i
= 0; i
< bsc
->size
; ++i
)
1503 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1507 switch (slot
->state
)
1509 case SYMBOL_SLOT_UNUSED
:
1511 case SYMBOL_SLOT_NOT_FOUND
:
1512 printf_filtered (" [%4u] = %s, %s %s (not found)\n", i
,
1513 host_address_to_string (slot
->objfile_context
),
1514 slot
->value
.not_found
.name
,
1515 domain_name (slot
->value
.not_found
.domain
));
1517 case SYMBOL_SLOT_FOUND
:
1519 struct symbol
*found
= slot
->value
.found
.symbol
;
1520 const struct objfile
*context
= slot
->objfile_context
;
1522 printf_filtered (" [%4u] = %s, %s %s\n", i
,
1523 host_address_to_string (context
),
1524 SYMBOL_PRINT_NAME (found
),
1525 domain_name (SYMBOL_DOMAIN (found
)));
1533 /* The "mt print symbol-cache" command. */
1536 maintenance_print_symbol_cache (const char *args
, int from_tty
)
1538 struct program_space
*pspace
;
1540 ALL_PSPACES (pspace
)
1542 struct symbol_cache
*cache
;
1544 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1546 pspace
->symfile_object_file
!= NULL
1547 ? objfile_name (pspace
->symfile_object_file
)
1548 : "(no object file)");
1550 /* If the cache hasn't been created yet, avoid creating one. */
1551 cache
= symbol_cache_key
.get (pspace
);
1553 printf_filtered (" <empty>\n");
1555 symbol_cache_dump (cache
);
1559 /* The "mt flush-symbol-cache" command. */
1562 maintenance_flush_symbol_cache (const char *args
, int from_tty
)
1564 struct program_space
*pspace
;
1566 ALL_PSPACES (pspace
)
1568 symbol_cache_flush (pspace
);
1572 /* Print usage statistics of CACHE. */
1575 symbol_cache_stats (struct symbol_cache
*cache
)
1579 if (cache
->global_symbols
== NULL
)
1581 printf_filtered (" <disabled>\n");
1585 for (pass
= 0; pass
< 2; ++pass
)
1587 const struct block_symbol_cache
*bsc
1588 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1593 printf_filtered ("Global block cache stats:\n");
1595 printf_filtered ("Static block cache stats:\n");
1597 printf_filtered (" size: %u\n", bsc
->size
);
1598 printf_filtered (" hits: %u\n", bsc
->hits
);
1599 printf_filtered (" misses: %u\n", bsc
->misses
);
1600 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1604 /* The "mt print symbol-cache-statistics" command. */
1607 maintenance_print_symbol_cache_statistics (const char *args
, int from_tty
)
1609 struct program_space
*pspace
;
1611 ALL_PSPACES (pspace
)
1613 struct symbol_cache
*cache
;
1615 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1617 pspace
->symfile_object_file
!= NULL
1618 ? objfile_name (pspace
->symfile_object_file
)
1619 : "(no object file)");
1621 /* If the cache hasn't been created yet, avoid creating one. */
1622 cache
= symbol_cache_key
.get (pspace
);
1624 printf_filtered (" empty, no stats available\n");
1626 symbol_cache_stats (cache
);
1630 /* This module's 'new_objfile' observer. */
1633 symtab_new_objfile_observer (struct objfile
*objfile
)
1635 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1636 symbol_cache_flush (current_program_space
);
1639 /* This module's 'free_objfile' observer. */
1642 symtab_free_objfile_observer (struct objfile
*objfile
)
1644 symbol_cache_flush (objfile
->pspace
);
1647 /* Debug symbols usually don't have section information. We need to dig that
1648 out of the minimal symbols and stash that in the debug symbol. */
1651 fixup_section (struct general_symbol_info
*ginfo
,
1652 CORE_ADDR addr
, struct objfile
*objfile
)
1654 struct minimal_symbol
*msym
;
1656 /* First, check whether a minimal symbol with the same name exists
1657 and points to the same address. The address check is required
1658 e.g. on PowerPC64, where the minimal symbol for a function will
1659 point to the function descriptor, while the debug symbol will
1660 point to the actual function code. */
1661 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1663 ginfo
->section
= MSYMBOL_SECTION (msym
);
1666 /* Static, function-local variables do appear in the linker
1667 (minimal) symbols, but are frequently given names that won't
1668 be found via lookup_minimal_symbol(). E.g., it has been
1669 observed in frv-uclinux (ELF) executables that a static,
1670 function-local variable named "foo" might appear in the
1671 linker symbols as "foo.6" or "foo.3". Thus, there is no
1672 point in attempting to extend the lookup-by-name mechanism to
1673 handle this case due to the fact that there can be multiple
1676 So, instead, search the section table when lookup by name has
1677 failed. The ``addr'' and ``endaddr'' fields may have already
1678 been relocated. If so, the relocation offset (i.e. the
1679 ANOFFSET value) needs to be subtracted from these values when
1680 performing the comparison. We unconditionally subtract it,
1681 because, when no relocation has been performed, the ANOFFSET
1682 value will simply be zero.
1684 The address of the symbol whose section we're fixing up HAS
1685 NOT BEEN adjusted (relocated) yet. It can't have been since
1686 the section isn't yet known and knowing the section is
1687 necessary in order to add the correct relocation value. In
1688 other words, we wouldn't even be in this function (attempting
1689 to compute the section) if it were already known.
1691 Note that it is possible to search the minimal symbols
1692 (subtracting the relocation value if necessary) to find the
1693 matching minimal symbol, but this is overkill and much less
1694 efficient. It is not necessary to find the matching minimal
1695 symbol, only its section.
1697 Note that this technique (of doing a section table search)
1698 can fail when unrelocated section addresses overlap. For
1699 this reason, we still attempt a lookup by name prior to doing
1700 a search of the section table. */
1702 struct obj_section
*s
;
1705 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1707 int idx
= s
- objfile
->sections
;
1708 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1713 if (obj_section_addr (s
) - offset
<= addr
1714 && addr
< obj_section_endaddr (s
) - offset
)
1716 ginfo
->section
= idx
;
1721 /* If we didn't find the section, assume it is in the first
1722 section. If there is no allocated section, then it hardly
1723 matters what we pick, so just pick zero. */
1727 ginfo
->section
= fallback
;
1732 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1739 if (!SYMBOL_OBJFILE_OWNED (sym
))
1742 /* We either have an OBJFILE, or we can get at it from the sym's
1743 symtab. Anything else is a bug. */
1744 gdb_assert (objfile
|| symbol_symtab (sym
));
1746 if (objfile
== NULL
)
1747 objfile
= symbol_objfile (sym
);
1749 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1752 /* We should have an objfile by now. */
1753 gdb_assert (objfile
);
1755 switch (SYMBOL_CLASS (sym
))
1759 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1762 addr
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
));
1766 /* Nothing else will be listed in the minsyms -- no use looking
1771 fixup_section (&sym
->ginfo
, addr
, objfile
);
1778 demangle_for_lookup_info::demangle_for_lookup_info
1779 (const lookup_name_info
&lookup_name
, language lang
)
1781 demangle_result_storage storage
;
1783 if (lookup_name
.ignore_parameters () && lang
== language_cplus
)
1785 gdb::unique_xmalloc_ptr
<char> without_params
1786 = cp_remove_params_if_any (lookup_name
.name ().c_str (),
1787 lookup_name
.completion_mode ());
1789 if (without_params
!= NULL
)
1791 if (lookup_name
.match_type () != symbol_name_match_type::SEARCH_NAME
)
1792 m_demangled_name
= demangle_for_lookup (without_params
.get (),
1798 if (lookup_name
.match_type () == symbol_name_match_type::SEARCH_NAME
)
1799 m_demangled_name
= lookup_name
.name ();
1801 m_demangled_name
= demangle_for_lookup (lookup_name
.name ().c_str (),
1807 const lookup_name_info
&
1808 lookup_name_info::match_any ()
1810 /* Lookup any symbol that "" would complete. I.e., this matches all
1812 static const lookup_name_info
lookup_name ({}, symbol_name_match_type::FULL
,
1818 /* Compute the demangled form of NAME as used by the various symbol
1819 lookup functions. The result can either be the input NAME
1820 directly, or a pointer to a buffer owned by the STORAGE object.
1822 For Ada, this function just returns NAME, unmodified.
1823 Normally, Ada symbol lookups are performed using the encoded name
1824 rather than the demangled name, and so it might seem to make sense
1825 for this function to return an encoded version of NAME.
1826 Unfortunately, we cannot do this, because this function is used in
1827 circumstances where it is not appropriate to try to encode NAME.
1828 For instance, when displaying the frame info, we demangle the name
1829 of each parameter, and then perform a symbol lookup inside our
1830 function using that demangled name. In Ada, certain functions
1831 have internally-generated parameters whose name contain uppercase
1832 characters. Encoding those name would result in those uppercase
1833 characters to become lowercase, and thus cause the symbol lookup
1837 demangle_for_lookup (const char *name
, enum language lang
,
1838 demangle_result_storage
&storage
)
1840 /* If we are using C++, D, or Go, demangle the name before doing a
1841 lookup, so we can always binary search. */
1842 if (lang
== language_cplus
)
1844 char *demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1845 if (demangled_name
!= NULL
)
1846 return storage
.set_malloc_ptr (demangled_name
);
1848 /* If we were given a non-mangled name, canonicalize it
1849 according to the language (so far only for C++). */
1850 std::string canon
= cp_canonicalize_string (name
);
1851 if (!canon
.empty ())
1852 return storage
.swap_string (canon
);
1854 else if (lang
== language_d
)
1856 char *demangled_name
= d_demangle (name
, 0);
1857 if (demangled_name
!= NULL
)
1858 return storage
.set_malloc_ptr (demangled_name
);
1860 else if (lang
== language_go
)
1862 char *demangled_name
= go_demangle (name
, 0);
1863 if (demangled_name
!= NULL
)
1864 return storage
.set_malloc_ptr (demangled_name
);
1873 search_name_hash (enum language language
, const char *search_name
)
1875 return language_def (language
)->la_search_name_hash (search_name
);
1880 This function (or rather its subordinates) have a bunch of loops and
1881 it would seem to be attractive to put in some QUIT's (though I'm not really
1882 sure whether it can run long enough to be really important). But there
1883 are a few calls for which it would appear to be bad news to quit
1884 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1885 that there is C++ code below which can error(), but that probably
1886 doesn't affect these calls since they are looking for a known
1887 variable and thus can probably assume it will never hit the C++
1891 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1892 const domain_enum domain
, enum language lang
,
1893 struct field_of_this_result
*is_a_field_of_this
)
1895 demangle_result_storage storage
;
1896 const char *modified_name
= demangle_for_lookup (name
, lang
, storage
);
1898 return lookup_symbol_aux (modified_name
,
1899 symbol_name_match_type::FULL
,
1900 block
, domain
, lang
,
1901 is_a_field_of_this
);
1907 lookup_symbol (const char *name
, const struct block
*block
,
1909 struct field_of_this_result
*is_a_field_of_this
)
1911 return lookup_symbol_in_language (name
, block
, domain
,
1912 current_language
->la_language
,
1913 is_a_field_of_this
);
1919 lookup_symbol_search_name (const char *search_name
, const struct block
*block
,
1922 return lookup_symbol_aux (search_name
, symbol_name_match_type::SEARCH_NAME
,
1923 block
, domain
, language_asm
, NULL
);
1929 lookup_language_this (const struct language_defn
*lang
,
1930 const struct block
*block
)
1932 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1935 if (symbol_lookup_debug
> 1)
1937 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1939 fprintf_unfiltered (gdb_stdlog
,
1940 "lookup_language_this (%s, %s (objfile %s))",
1941 lang
->la_name
, host_address_to_string (block
),
1942 objfile_debug_name (objfile
));
1949 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
,
1950 symbol_name_match_type::SEARCH_NAME
,
1954 if (symbol_lookup_debug
> 1)
1956 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1957 SYMBOL_PRINT_NAME (sym
),
1958 host_address_to_string (sym
),
1959 host_address_to_string (block
));
1961 return (struct block_symbol
) {sym
, block
};
1963 if (BLOCK_FUNCTION (block
))
1965 block
= BLOCK_SUPERBLOCK (block
);
1968 if (symbol_lookup_debug
> 1)
1969 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
1973 /* Given TYPE, a structure/union,
1974 return 1 if the component named NAME from the ultimate target
1975 structure/union is defined, otherwise, return 0. */
1978 check_field (struct type
*type
, const char *name
,
1979 struct field_of_this_result
*is_a_field_of_this
)
1983 /* The type may be a stub. */
1984 type
= check_typedef (type
);
1986 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1988 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1990 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1992 is_a_field_of_this
->type
= type
;
1993 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1998 /* C++: If it was not found as a data field, then try to return it
1999 as a pointer to a method. */
2001 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
2003 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
2005 is_a_field_of_this
->type
= type
;
2006 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
2011 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
2012 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
2018 /* Behave like lookup_symbol except that NAME is the natural name
2019 (e.g., demangled name) of the symbol that we're looking for. */
2021 static struct block_symbol
2022 lookup_symbol_aux (const char *name
, symbol_name_match_type match_type
,
2023 const struct block
*block
,
2024 const domain_enum domain
, enum language language
,
2025 struct field_of_this_result
*is_a_field_of_this
)
2027 struct block_symbol result
;
2028 const struct language_defn
*langdef
;
2030 if (symbol_lookup_debug
)
2032 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2034 fprintf_unfiltered (gdb_stdlog
,
2035 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2036 name
, host_address_to_string (block
),
2038 ? objfile_debug_name (objfile
) : "NULL",
2039 domain_name (domain
), language_str (language
));
2042 /* Make sure we do something sensible with is_a_field_of_this, since
2043 the callers that set this parameter to some non-null value will
2044 certainly use it later. If we don't set it, the contents of
2045 is_a_field_of_this are undefined. */
2046 if (is_a_field_of_this
!= NULL
)
2047 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
2049 /* Search specified block and its superiors. Don't search
2050 STATIC_BLOCK or GLOBAL_BLOCK. */
2052 result
= lookup_local_symbol (name
, match_type
, block
, domain
, language
);
2053 if (result
.symbol
!= NULL
)
2055 if (symbol_lookup_debug
)
2057 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2058 host_address_to_string (result
.symbol
));
2063 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2064 check to see if NAME is a field of `this'. */
2066 langdef
= language_def (language
);
2068 /* Don't do this check if we are searching for a struct. It will
2069 not be found by check_field, but will be found by other
2071 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
2073 result
= lookup_language_this (langdef
, block
);
2077 struct type
*t
= result
.symbol
->type
;
2079 /* I'm not really sure that type of this can ever
2080 be typedefed; just be safe. */
2081 t
= check_typedef (t
);
2082 if (TYPE_CODE (t
) == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (t
))
2083 t
= TYPE_TARGET_TYPE (t
);
2085 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
2086 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
2087 error (_("Internal error: `%s' is not an aggregate"),
2088 langdef
->la_name_of_this
);
2090 if (check_field (t
, name
, is_a_field_of_this
))
2092 if (symbol_lookup_debug
)
2094 fprintf_unfiltered (gdb_stdlog
,
2095 "lookup_symbol_aux (...) = NULL\n");
2102 /* Now do whatever is appropriate for LANGUAGE to look
2103 up static and global variables. */
2105 result
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2106 if (result
.symbol
!= NULL
)
2108 if (symbol_lookup_debug
)
2110 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2111 host_address_to_string (result
.symbol
));
2116 /* Now search all static file-level symbols. Not strictly correct,
2117 but more useful than an error. */
2119 result
= lookup_static_symbol (name
, domain
);
2120 if (symbol_lookup_debug
)
2122 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2123 result
.symbol
!= NULL
2124 ? host_address_to_string (result
.symbol
)
2130 /* Check to see if the symbol is defined in BLOCK or its superiors.
2131 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2133 static struct block_symbol
2134 lookup_local_symbol (const char *name
,
2135 symbol_name_match_type match_type
,
2136 const struct block
*block
,
2137 const domain_enum domain
,
2138 enum language language
)
2141 const struct block
*static_block
= block_static_block (block
);
2142 const char *scope
= block_scope (block
);
2144 /* Check if either no block is specified or it's a global block. */
2146 if (static_block
== NULL
)
2149 while (block
!= static_block
)
2151 sym
= lookup_symbol_in_block (name
, match_type
, block
, domain
);
2153 return (struct block_symbol
) {sym
, block
};
2155 if (language
== language_cplus
|| language
== language_fortran
)
2157 struct block_symbol blocksym
2158 = cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2161 if (blocksym
.symbol
!= NULL
)
2165 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2167 block
= BLOCK_SUPERBLOCK (block
);
2170 /* We've reached the end of the function without finding a result. */
2178 lookup_objfile_from_block (const struct block
*block
)
2183 block
= block_global_block (block
);
2184 /* Look through all blockvectors. */
2185 for (objfile
*obj
: current_program_space
->objfiles ())
2187 for (compunit_symtab
*cust
: obj
->compunits ())
2188 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2191 if (obj
->separate_debug_objfile_backlink
)
2192 obj
= obj
->separate_debug_objfile_backlink
;
2204 lookup_symbol_in_block (const char *name
, symbol_name_match_type match_type
,
2205 const struct block
*block
,
2206 const domain_enum domain
)
2210 if (symbol_lookup_debug
> 1)
2212 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2214 fprintf_unfiltered (gdb_stdlog
,
2215 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2216 name
, host_address_to_string (block
),
2217 objfile_debug_name (objfile
),
2218 domain_name (domain
));
2221 sym
= block_lookup_symbol (block
, name
, match_type
, domain
);
2224 if (symbol_lookup_debug
> 1)
2226 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2227 host_address_to_string (sym
));
2229 return fixup_symbol_section (sym
, NULL
);
2232 if (symbol_lookup_debug
> 1)
2233 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2240 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2241 enum block_enum block_index
,
2243 const domain_enum domain
)
2245 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2247 for (objfile
*objfile
: main_objfile
->separate_debug_objfiles ())
2249 struct block_symbol result
2250 = lookup_symbol_in_objfile (objfile
, block_index
, name
, domain
);
2252 if (result
.symbol
!= nullptr)
2259 /* Check to see if the symbol is defined in one of the OBJFILE's
2260 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2261 depending on whether or not we want to search global symbols or
2264 static struct block_symbol
2265 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
,
2266 enum block_enum block_index
, const char *name
,
2267 const domain_enum domain
)
2269 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2271 if (symbol_lookup_debug
> 1)
2273 fprintf_unfiltered (gdb_stdlog
,
2274 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2275 objfile_debug_name (objfile
),
2276 block_index
== GLOBAL_BLOCK
2277 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2278 name
, domain_name (domain
));
2281 for (compunit_symtab
*cust
: objfile
->compunits ())
2283 const struct blockvector
*bv
;
2284 const struct block
*block
;
2285 struct block_symbol result
;
2287 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2288 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2289 result
.symbol
= block_lookup_symbol_primary (block
, name
, domain
);
2290 result
.block
= block
;
2291 if (result
.symbol
!= NULL
)
2293 if (symbol_lookup_debug
> 1)
2295 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2296 host_address_to_string (result
.symbol
),
2297 host_address_to_string (block
));
2299 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2305 if (symbol_lookup_debug
> 1)
2306 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2310 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2311 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2312 and all associated separate debug objfiles.
2314 Normally we only look in OBJFILE, and not any separate debug objfiles
2315 because the outer loop will cause them to be searched too. This case is
2316 different. Here we're called from search_symbols where it will only
2317 call us for the objfile that contains a matching minsym. */
2319 static struct block_symbol
2320 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2321 const char *linkage_name
,
2324 enum language lang
= current_language
->la_language
;
2325 struct objfile
*main_objfile
;
2327 demangle_result_storage storage
;
2328 const char *modified_name
= demangle_for_lookup (linkage_name
, lang
, storage
);
2330 if (objfile
->separate_debug_objfile_backlink
)
2331 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2333 main_objfile
= objfile
;
2335 for (::objfile
*cur_objfile
: main_objfile
->separate_debug_objfiles ())
2337 struct block_symbol result
;
2339 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2340 modified_name
, domain
);
2341 if (result
.symbol
== NULL
)
2342 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2343 modified_name
, domain
);
2344 if (result
.symbol
!= NULL
)
2351 /* A helper function that throws an exception when a symbol was found
2352 in a psymtab but not in a symtab. */
2354 static void ATTRIBUTE_NORETURN
2355 error_in_psymtab_expansion (enum block_enum block_index
, const char *name
,
2356 struct compunit_symtab
*cust
)
2359 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2360 %s may be an inlined function, or may be a template function\n \
2361 (if a template, try specifying an instantiation: %s<type>)."),
2362 block_index
== GLOBAL_BLOCK
? "global" : "static",
2364 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2368 /* A helper function for various lookup routines that interfaces with
2369 the "quick" symbol table functions. */
2371 static struct block_symbol
2372 lookup_symbol_via_quick_fns (struct objfile
*objfile
,
2373 enum block_enum block_index
, const char *name
,
2374 const domain_enum domain
)
2376 struct compunit_symtab
*cust
;
2377 const struct blockvector
*bv
;
2378 const struct block
*block
;
2379 struct block_symbol result
;
2384 if (symbol_lookup_debug
> 1)
2386 fprintf_unfiltered (gdb_stdlog
,
2387 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2388 objfile_debug_name (objfile
),
2389 block_index
== GLOBAL_BLOCK
2390 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2391 name
, domain_name (domain
));
2394 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2397 if (symbol_lookup_debug
> 1)
2399 fprintf_unfiltered (gdb_stdlog
,
2400 "lookup_symbol_via_quick_fns (...) = NULL\n");
2405 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2406 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2407 result
.symbol
= block_lookup_symbol (block
, name
,
2408 symbol_name_match_type::FULL
, domain
);
2409 if (result
.symbol
== NULL
)
2410 error_in_psymtab_expansion (block_index
, name
, cust
);
2412 if (symbol_lookup_debug
> 1)
2414 fprintf_unfiltered (gdb_stdlog
,
2415 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2416 host_address_to_string (result
.symbol
),
2417 host_address_to_string (block
));
2420 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2421 result
.block
= block
;
2428 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2430 const struct block
*block
,
2431 const domain_enum domain
)
2433 struct block_symbol result
;
2435 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2436 the current objfile. Searching the current objfile first is useful
2437 for both matching user expectations as well as performance. */
2439 result
= lookup_symbol_in_static_block (name
, block
, domain
);
2440 if (result
.symbol
!= NULL
)
2443 /* If we didn't find a definition for a builtin type in the static block,
2444 search for it now. This is actually the right thing to do and can be
2445 a massive performance win. E.g., when debugging a program with lots of
2446 shared libraries we could search all of them only to find out the
2447 builtin type isn't defined in any of them. This is common for types
2449 if (domain
== VAR_DOMAIN
)
2451 struct gdbarch
*gdbarch
;
2454 gdbarch
= target_gdbarch ();
2456 gdbarch
= block_gdbarch (block
);
2457 result
.symbol
= language_lookup_primitive_type_as_symbol (langdef
,
2459 result
.block
= NULL
;
2460 if (result
.symbol
!= NULL
)
2464 return lookup_global_symbol (name
, block
, domain
);
2470 lookup_symbol_in_static_block (const char *name
,
2471 const struct block
*block
,
2472 const domain_enum domain
)
2474 const struct block
*static_block
= block_static_block (block
);
2477 if (static_block
== NULL
)
2480 if (symbol_lookup_debug
)
2482 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2484 fprintf_unfiltered (gdb_stdlog
,
2485 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2488 host_address_to_string (block
),
2489 objfile_debug_name (objfile
),
2490 domain_name (domain
));
2493 sym
= lookup_symbol_in_block (name
,
2494 symbol_name_match_type::FULL
,
2495 static_block
, domain
);
2496 if (symbol_lookup_debug
)
2498 fprintf_unfiltered (gdb_stdlog
,
2499 "lookup_symbol_in_static_block (...) = %s\n",
2500 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2502 return (struct block_symbol
) {sym
, static_block
};
2505 /* Perform the standard symbol lookup of NAME in OBJFILE:
2506 1) First search expanded symtabs, and if not found
2507 2) Search the "quick" symtabs (partial or .gdb_index).
2508 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2510 static struct block_symbol
2511 lookup_symbol_in_objfile (struct objfile
*objfile
, enum block_enum block_index
,
2512 const char *name
, const domain_enum domain
)
2514 struct block_symbol result
;
2516 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2518 if (symbol_lookup_debug
)
2520 fprintf_unfiltered (gdb_stdlog
,
2521 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2522 objfile_debug_name (objfile
),
2523 block_index
== GLOBAL_BLOCK
2524 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2525 name
, domain_name (domain
));
2528 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2530 if (result
.symbol
!= NULL
)
2532 if (symbol_lookup_debug
)
2534 fprintf_unfiltered (gdb_stdlog
,
2535 "lookup_symbol_in_objfile (...) = %s"
2537 host_address_to_string (result
.symbol
));
2542 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2544 if (symbol_lookup_debug
)
2546 fprintf_unfiltered (gdb_stdlog
,
2547 "lookup_symbol_in_objfile (...) = %s%s\n",
2548 result
.symbol
!= NULL
2549 ? host_address_to_string (result
.symbol
)
2551 result
.symbol
!= NULL
? " (via quick fns)" : "");
2556 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2558 struct global_or_static_sym_lookup_data
2560 /* The name of the symbol we are searching for. */
2563 /* The domain to use for our search. */
2566 /* The block index in which to search. */
2567 enum block_enum block_index
;
2569 /* The field where the callback should store the symbol if found.
2570 It should be initialized to {NULL, NULL} before the search is started. */
2571 struct block_symbol result
;
2574 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2575 It searches by name for a symbol in the block given by BLOCK_INDEX of the
2576 given OBJFILE. The arguments for the search are passed via CB_DATA, which
2577 in reality is a pointer to struct global_or_static_sym_lookup_data. */
2580 lookup_symbol_global_or_static_iterator_cb (struct objfile
*objfile
,
2583 struct global_or_static_sym_lookup_data
*data
=
2584 (struct global_or_static_sym_lookup_data
*) cb_data
;
2586 gdb_assert (data
->result
.symbol
== NULL
2587 && data
->result
.block
== NULL
);
2589 data
->result
= lookup_symbol_in_objfile (objfile
, data
->block_index
,
2590 data
->name
, data
->domain
);
2592 /* If we found a match, tell the iterator to stop. Otherwise,
2594 return (data
->result
.symbol
!= NULL
);
2597 /* This function contains the common code of lookup_{global,static}_symbol.
2598 OBJFILE is only used if BLOCK_INDEX is GLOBAL_SCOPE, in which case it is
2599 the objfile to start the lookup in. */
2601 static struct block_symbol
2602 lookup_global_or_static_symbol (const char *name
,
2603 enum block_enum block_index
,
2604 struct objfile
*objfile
,
2605 const domain_enum domain
)
2607 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2608 struct block_symbol result
;
2609 struct global_or_static_sym_lookup_data lookup_data
;
2610 struct block_symbol_cache
*bsc
;
2611 struct symbol_cache_slot
*slot
;
2613 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2614 gdb_assert (objfile
== nullptr || block_index
== GLOBAL_BLOCK
);
2616 /* First see if we can find the symbol in the cache.
2617 This works because we use the current objfile to qualify the lookup. */
2618 result
= symbol_cache_lookup (cache
, objfile
, block_index
, name
, domain
,
2620 if (result
.symbol
!= NULL
)
2622 if (SYMBOL_LOOKUP_FAILED_P (result
))
2627 /* Do a global search (of global blocks, heh). */
2628 if (result
.symbol
== NULL
)
2630 memset (&lookup_data
, 0, sizeof (lookup_data
));
2631 lookup_data
.name
= name
;
2632 lookup_data
.block_index
= block_index
;
2633 lookup_data
.domain
= domain
;
2634 gdbarch_iterate_over_objfiles_in_search_order
2635 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2636 lookup_symbol_global_or_static_iterator_cb
, &lookup_data
, objfile
);
2637 result
= lookup_data
.result
;
2640 if (result
.symbol
!= NULL
)
2641 symbol_cache_mark_found (bsc
, slot
, objfile
, result
.symbol
, result
.block
);
2643 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2651 lookup_static_symbol (const char *name
, const domain_enum domain
)
2653 return lookup_global_or_static_symbol (name
, STATIC_BLOCK
, nullptr, domain
);
2659 lookup_global_symbol (const char *name
,
2660 const struct block
*block
,
2661 const domain_enum domain
)
2663 /* If a block was passed in, we want to search the corresponding
2664 global block first. This yields "more expected" behavior, and is
2665 needed to support 'FILENAME'::VARIABLE lookups. */
2666 const struct block
*global_block
= block_global_block (block
);
2667 if (global_block
!= nullptr)
2669 symbol
*sym
= lookup_symbol_in_block (name
,
2670 symbol_name_match_type::FULL
,
2671 global_block
, domain
);
2673 return { sym
, global_block
};
2676 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2677 return lookup_global_or_static_symbol (name
, GLOBAL_BLOCK
, objfile
, domain
);
2681 symbol_matches_domain (enum language symbol_language
,
2682 domain_enum symbol_domain
,
2685 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2686 Similarly, any Ada type declaration implicitly defines a typedef. */
2687 if (symbol_language
== language_cplus
2688 || symbol_language
== language_d
2689 || symbol_language
== language_ada
2690 || symbol_language
== language_rust
)
2692 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2693 && symbol_domain
== STRUCT_DOMAIN
)
2696 /* For all other languages, strict match is required. */
2697 return (symbol_domain
== domain
);
2703 lookup_transparent_type (const char *name
)
2705 return current_language
->la_lookup_transparent_type (name
);
2708 /* A helper for basic_lookup_transparent_type that interfaces with the
2709 "quick" symbol table functions. */
2711 static struct type
*
2712 basic_lookup_transparent_type_quick (struct objfile
*objfile
,
2713 enum block_enum block_index
,
2716 struct compunit_symtab
*cust
;
2717 const struct blockvector
*bv
;
2718 const struct block
*block
;
2723 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2728 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2729 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2730 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2731 block_find_non_opaque_type
, NULL
);
2733 error_in_psymtab_expansion (block_index
, name
, cust
);
2734 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2735 return SYMBOL_TYPE (sym
);
2738 /* Subroutine of basic_lookup_transparent_type to simplify it.
2739 Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
2740 BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */
2742 static struct type
*
2743 basic_lookup_transparent_type_1 (struct objfile
*objfile
,
2744 enum block_enum block_index
,
2747 const struct blockvector
*bv
;
2748 const struct block
*block
;
2749 const struct symbol
*sym
;
2751 for (compunit_symtab
*cust
: objfile
->compunits ())
2753 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2754 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2755 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2756 block_find_non_opaque_type
, NULL
);
2759 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2760 return SYMBOL_TYPE (sym
);
2767 /* The standard implementation of lookup_transparent_type. This code
2768 was modeled on lookup_symbol -- the parts not relevant to looking
2769 up types were just left out. In particular it's assumed here that
2770 types are available in STRUCT_DOMAIN and only in file-static or
2774 basic_lookup_transparent_type (const char *name
)
2778 /* Now search all the global symbols. Do the symtab's first, then
2779 check the psymtab's. If a psymtab indicates the existence
2780 of the desired name as a global, then do psymtab-to-symtab
2781 conversion on the fly and return the found symbol. */
2783 for (objfile
*objfile
: current_program_space
->objfiles ())
2785 t
= basic_lookup_transparent_type_1 (objfile
, GLOBAL_BLOCK
, name
);
2790 for (objfile
*objfile
: current_program_space
->objfiles ())
2792 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2797 /* Now search the static file-level symbols.
2798 Not strictly correct, but more useful than an error.
2799 Do the symtab's first, then
2800 check the psymtab's. If a psymtab indicates the existence
2801 of the desired name as a file-level static, then do psymtab-to-symtab
2802 conversion on the fly and return the found symbol. */
2804 for (objfile
*objfile
: current_program_space
->objfiles ())
2806 t
= basic_lookup_transparent_type_1 (objfile
, STATIC_BLOCK
, name
);
2811 for (objfile
*objfile
: current_program_space
->objfiles ())
2813 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2818 return (struct type
*) 0;
2824 iterate_over_symbols (const struct block
*block
,
2825 const lookup_name_info
&name
,
2826 const domain_enum domain
,
2827 gdb::function_view
<symbol_found_callback_ftype
> callback
)
2829 struct block_iterator iter
;
2832 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2834 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2835 SYMBOL_DOMAIN (sym
), domain
))
2837 struct block_symbol block_sym
= {sym
, block
};
2839 if (!callback (&block_sym
))
2849 iterate_over_symbols_terminated
2850 (const struct block
*block
,
2851 const lookup_name_info
&name
,
2852 const domain_enum domain
,
2853 gdb::function_view
<symbol_found_callback_ftype
> callback
)
2855 if (!iterate_over_symbols (block
, name
, domain
, callback
))
2857 struct block_symbol block_sym
= {nullptr, block
};
2858 return callback (&block_sym
);
2861 /* Find the compunit symtab associated with PC and SECTION.
2862 This will read in debug info as necessary. */
2864 struct compunit_symtab
*
2865 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2867 struct compunit_symtab
*best_cust
= NULL
;
2868 CORE_ADDR distance
= 0;
2869 struct bound_minimal_symbol msymbol
;
2871 /* If we know that this is not a text address, return failure. This is
2872 necessary because we loop based on the block's high and low code
2873 addresses, which do not include the data ranges, and because
2874 we call find_pc_sect_psymtab which has a similar restriction based
2875 on the partial_symtab's texthigh and textlow. */
2876 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2877 if (msymbol
.minsym
&& msymbol
.minsym
->data_p ())
2880 /* Search all symtabs for the one whose file contains our address, and which
2881 is the smallest of all the ones containing the address. This is designed
2882 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2883 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2884 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2886 This happens for native ecoff format, where code from included files
2887 gets its own symtab. The symtab for the included file should have
2888 been read in already via the dependency mechanism.
2889 It might be swifter to create several symtabs with the same name
2890 like xcoff does (I'm not sure).
2892 It also happens for objfiles that have their functions reordered.
2893 For these, the symtab we are looking for is not necessarily read in. */
2895 for (objfile
*obj_file
: current_program_space
->objfiles ())
2897 for (compunit_symtab
*cust
: obj_file
->compunits ())
2899 const struct block
*b
;
2900 const struct blockvector
*bv
;
2902 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2903 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2905 if (BLOCK_START (b
) <= pc
2906 && BLOCK_END (b
) > pc
2908 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2910 /* For an objfile that has its functions reordered,
2911 find_pc_psymtab will find the proper partial symbol table
2912 and we simply return its corresponding symtab. */
2913 /* In order to better support objfiles that contain both
2914 stabs and coff debugging info, we continue on if a psymtab
2916 if ((obj_file
->flags
& OBJF_REORDERED
) && obj_file
->sf
)
2918 struct compunit_symtab
*result
;
2921 = obj_file
->sf
->qf
->find_pc_sect_compunit_symtab (obj_file
,
2931 struct block_iterator iter
;
2932 struct symbol
*sym
= NULL
;
2934 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2936 fixup_symbol_section (sym
, obj_file
);
2937 if (matching_obj_sections (SYMBOL_OBJ_SECTION (obj_file
,
2943 continue; /* No symbol in this symtab matches
2946 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2952 if (best_cust
!= NULL
)
2955 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2957 for (objfile
*objf
: current_program_space
->objfiles ())
2959 struct compunit_symtab
*result
;
2963 result
= objf
->sf
->qf
->find_pc_sect_compunit_symtab (objf
,
2974 /* Find the compunit symtab associated with PC.
2975 This will read in debug info as necessary.
2976 Backward compatibility, no section. */
2978 struct compunit_symtab
*
2979 find_pc_compunit_symtab (CORE_ADDR pc
)
2981 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
2987 find_symbol_at_address (CORE_ADDR address
)
2989 for (objfile
*objfile
: current_program_space
->objfiles ())
2991 if (objfile
->sf
== NULL
2992 || objfile
->sf
->qf
->find_compunit_symtab_by_address
== NULL
)
2995 struct compunit_symtab
*symtab
2996 = objfile
->sf
->qf
->find_compunit_symtab_by_address (objfile
, address
);
2999 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (symtab
);
3001 for (int i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; ++i
)
3003 const struct block
*b
= BLOCKVECTOR_BLOCK (bv
, i
);
3004 struct block_iterator iter
;
3007 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3009 if (SYMBOL_CLASS (sym
) == LOC_STATIC
3010 && SYMBOL_VALUE_ADDRESS (sym
) == address
)
3022 /* Find the source file and line number for a given PC value and SECTION.
3023 Return a structure containing a symtab pointer, a line number,
3024 and a pc range for the entire source line.
3025 The value's .pc field is NOT the specified pc.
3026 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3027 use the line that ends there. Otherwise, in that case, the line
3028 that begins there is used. */
3030 /* The big complication here is that a line may start in one file, and end just
3031 before the start of another file. This usually occurs when you #include
3032 code in the middle of a subroutine. To properly find the end of a line's PC
3033 range, we must search all symtabs associated with this compilation unit, and
3034 find the one whose first PC is closer than that of the next line in this
3037 struct symtab_and_line
3038 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
3040 struct compunit_symtab
*cust
;
3041 struct linetable
*l
;
3043 struct linetable_entry
*item
;
3044 const struct blockvector
*bv
;
3045 struct bound_minimal_symbol msymbol
;
3047 /* Info on best line seen so far, and where it starts, and its file. */
3049 struct linetable_entry
*best
= NULL
;
3050 CORE_ADDR best_end
= 0;
3051 struct symtab
*best_symtab
= 0;
3053 /* Store here the first line number
3054 of a file which contains the line at the smallest pc after PC.
3055 If we don't find a line whose range contains PC,
3056 we will use a line one less than this,
3057 with a range from the start of that file to the first line's pc. */
3058 struct linetable_entry
*alt
= NULL
;
3060 /* Info on best line seen in this file. */
3062 struct linetable_entry
*prev
;
3064 /* If this pc is not from the current frame,
3065 it is the address of the end of a call instruction.
3066 Quite likely that is the start of the following statement.
3067 But what we want is the statement containing the instruction.
3068 Fudge the pc to make sure we get that. */
3070 /* It's tempting to assume that, if we can't find debugging info for
3071 any function enclosing PC, that we shouldn't search for line
3072 number info, either. However, GAS can emit line number info for
3073 assembly files --- very helpful when debugging hand-written
3074 assembly code. In such a case, we'd have no debug info for the
3075 function, but we would have line info. */
3080 /* elz: added this because this function returned the wrong
3081 information if the pc belongs to a stub (import/export)
3082 to call a shlib function. This stub would be anywhere between
3083 two functions in the target, and the line info was erroneously
3084 taken to be the one of the line before the pc. */
3086 /* RT: Further explanation:
3088 * We have stubs (trampolines) inserted between procedures.
3090 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3091 * exists in the main image.
3093 * In the minimal symbol table, we have a bunch of symbols
3094 * sorted by start address. The stubs are marked as "trampoline",
3095 * the others appear as text. E.g.:
3097 * Minimal symbol table for main image
3098 * main: code for main (text symbol)
3099 * shr1: stub (trampoline symbol)
3100 * foo: code for foo (text symbol)
3102 * Minimal symbol table for "shr1" image:
3104 * shr1: code for shr1 (text symbol)
3107 * So the code below is trying to detect if we are in the stub
3108 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3109 * and if found, do the symbolization from the real-code address
3110 * rather than the stub address.
3112 * Assumptions being made about the minimal symbol table:
3113 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3114 * if we're really in the trampoline.s If we're beyond it (say
3115 * we're in "foo" in the above example), it'll have a closer
3116 * symbol (the "foo" text symbol for example) and will not
3117 * return the trampoline.
3118 * 2. lookup_minimal_symbol_text() will find a real text symbol
3119 * corresponding to the trampoline, and whose address will
3120 * be different than the trampoline address. I put in a sanity
3121 * check for the address being the same, to avoid an
3122 * infinite recursion.
3124 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3125 if (msymbol
.minsym
!= NULL
)
3126 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3128 struct bound_minimal_symbol mfunsym
3129 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3132 if (mfunsym
.minsym
== NULL
)
3133 /* I eliminated this warning since it is coming out
3134 * in the following situation:
3135 * gdb shmain // test program with shared libraries
3136 * (gdb) break shr1 // function in shared lib
3137 * Warning: In stub for ...
3138 * In the above situation, the shared lib is not loaded yet,
3139 * so of course we can't find the real func/line info,
3140 * but the "break" still works, and the warning is annoying.
3141 * So I commented out the warning. RT */
3142 /* warning ("In stub for %s; unable to find real function/line info",
3143 SYMBOL_LINKAGE_NAME (msymbol)); */
3146 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3147 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3148 /* Avoid infinite recursion */
3149 /* See above comment about why warning is commented out. */
3150 /* warning ("In stub for %s; unable to find real function/line info",
3151 SYMBOL_LINKAGE_NAME (msymbol)); */
3155 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3158 symtab_and_line val
;
3159 val
.pspace
= current_program_space
;
3161 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3164 /* If no symbol information, return previous pc. */
3171 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3173 /* Look at all the symtabs that share this blockvector.
3174 They all have the same apriori range, that we found was right;
3175 but they have different line tables. */
3177 for (symtab
*iter_s
: compunit_filetabs (cust
))
3179 /* Find the best line in this symtab. */
3180 l
= SYMTAB_LINETABLE (iter_s
);
3186 /* I think len can be zero if the symtab lacks line numbers
3187 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3188 I'm not sure which, and maybe it depends on the symbol
3194 item
= l
->item
; /* Get first line info. */
3196 /* Is this file's first line closer than the first lines of other files?
3197 If so, record this file, and its first line, as best alternate. */
3198 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3201 auto pc_compare
= [](const CORE_ADDR
& comp_pc
,
3202 const struct linetable_entry
& lhs
)->bool
3204 return comp_pc
< lhs
.pc
;
3207 struct linetable_entry
*first
= item
;
3208 struct linetable_entry
*last
= item
+ len
;
3209 item
= std::upper_bound (first
, last
, pc
, pc_compare
);
3211 prev
= item
- 1; /* Found a matching item. */
3213 /* At this point, prev points at the line whose start addr is <= pc, and
3214 item points at the next line. If we ran off the end of the linetable
3215 (pc >= start of the last line), then prev == item. If pc < start of
3216 the first line, prev will not be set. */
3218 /* Is this file's best line closer than the best in the other files?
3219 If so, record this file, and its best line, as best so far. Don't
3220 save prev if it represents the end of a function (i.e. line number
3221 0) instead of a real line. */
3223 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3226 best_symtab
= iter_s
;
3228 /* Discard BEST_END if it's before the PC of the current BEST. */
3229 if (best_end
<= best
->pc
)
3233 /* If another line (denoted by ITEM) is in the linetable and its
3234 PC is after BEST's PC, but before the current BEST_END, then
3235 use ITEM's PC as the new best_end. */
3236 if (best
&& item
< last
&& item
->pc
> best
->pc
3237 && (best_end
== 0 || best_end
> item
->pc
))
3238 best_end
= item
->pc
;
3243 /* If we didn't find any line number info, just return zeros.
3244 We used to return alt->line - 1 here, but that could be
3245 anywhere; if we don't have line number info for this PC,
3246 don't make some up. */
3249 else if (best
->line
== 0)
3251 /* If our best fit is in a range of PC's for which no line
3252 number info is available (line number is zero) then we didn't
3253 find any valid line information. */
3258 val
.symtab
= best_symtab
;
3259 val
.line
= best
->line
;
3261 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3266 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3268 val
.section
= section
;
3272 /* Backward compatibility (no section). */
3274 struct symtab_and_line
3275 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3277 struct obj_section
*section
;
3279 section
= find_pc_overlay (pc
);
3280 if (pc_in_unmapped_range (pc
, section
))
3281 pc
= overlay_mapped_address (pc
, section
);
3282 return find_pc_sect_line (pc
, section
, notcurrent
);
3288 find_pc_line_symtab (CORE_ADDR pc
)
3290 struct symtab_and_line sal
;
3292 /* This always passes zero for NOTCURRENT to find_pc_line.
3293 There are currently no callers that ever pass non-zero. */
3294 sal
= find_pc_line (pc
, 0);
3298 /* Find line number LINE in any symtab whose name is the same as
3301 If found, return the symtab that contains the linetable in which it was
3302 found, set *INDEX to the index in the linetable of the best entry
3303 found, and set *EXACT_MATCH to true if the value returned is an
3306 If not found, return NULL. */
3309 find_line_symtab (struct symtab
*sym_tab
, int line
,
3310 int *index
, bool *exact_match
)
3312 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3314 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3318 struct linetable
*best_linetable
;
3319 struct symtab
*best_symtab
;
3321 /* First try looking it up in the given symtab. */
3322 best_linetable
= SYMTAB_LINETABLE (sym_tab
);
3323 best_symtab
= sym_tab
;
3324 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3325 if (best_index
< 0 || !exact
)
3327 /* Didn't find an exact match. So we better keep looking for
3328 another symtab with the same name. In the case of xcoff,
3329 multiple csects for one source file (produced by IBM's FORTRAN
3330 compiler) produce multiple symtabs (this is unavoidable
3331 assuming csects can be at arbitrary places in memory and that
3332 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3334 /* BEST is the smallest linenumber > LINE so far seen,
3335 or 0 if none has been seen so far.
3336 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3339 if (best_index
>= 0)
3340 best
= best_linetable
->item
[best_index
].line
;
3344 for (objfile
*objfile
: current_program_space
->objfiles ())
3347 objfile
->sf
->qf
->expand_symtabs_with_fullname
3348 (objfile
, symtab_to_fullname (sym_tab
));
3351 for (objfile
*objfile
: current_program_space
->objfiles ())
3353 for (compunit_symtab
*cu
: objfile
->compunits ())
3355 for (symtab
*s
: compunit_filetabs (cu
))
3357 struct linetable
*l
;
3360 if (FILENAME_CMP (sym_tab
->filename
, s
->filename
) != 0)
3362 if (FILENAME_CMP (symtab_to_fullname (sym_tab
),
3363 symtab_to_fullname (s
)) != 0)
3365 l
= SYMTAB_LINETABLE (s
);
3366 ind
= find_line_common (l
, line
, &exact
, 0);
3376 if (best
== 0 || l
->item
[ind
].line
< best
)
3378 best
= l
->item
[ind
].line
;
3393 *index
= best_index
;
3395 *exact_match
= (exact
!= 0);
3400 /* Given SYMTAB, returns all the PCs function in the symtab that
3401 exactly match LINE. Returns an empty vector if there are no exact
3402 matches, but updates BEST_ITEM in this case. */
3404 std::vector
<CORE_ADDR
>
3405 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3406 struct linetable_entry
**best_item
)
3409 std::vector
<CORE_ADDR
> result
;
3411 /* First, collect all the PCs that are at this line. */
3417 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3424 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3426 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3432 result
.push_back (SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3440 /* Set the PC value for a given source file and line number and return true.
3441 Returns false for invalid line number (and sets the PC to 0).
3442 The source file is specified with a struct symtab. */
3445 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3447 struct linetable
*l
;
3454 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3457 l
= SYMTAB_LINETABLE (symtab
);
3458 *pc
= l
->item
[ind
].pc
;
3465 /* Find the range of pc values in a line.
3466 Store the starting pc of the line into *STARTPTR
3467 and the ending pc (start of next line) into *ENDPTR.
3468 Returns true to indicate success.
3469 Returns false if could not find the specified line. */
3472 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3475 CORE_ADDR startaddr
;
3476 struct symtab_and_line found_sal
;
3479 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3482 /* This whole function is based on address. For example, if line 10 has
3483 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3484 "info line *0x123" should say the line goes from 0x100 to 0x200
3485 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3486 This also insures that we never give a range like "starts at 0x134
3487 and ends at 0x12c". */
3489 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3490 if (found_sal
.line
!= sal
.line
)
3492 /* The specified line (sal) has zero bytes. */
3493 *startptr
= found_sal
.pc
;
3494 *endptr
= found_sal
.pc
;
3498 *startptr
= found_sal
.pc
;
3499 *endptr
= found_sal
.end
;
3504 /* Given a line table and a line number, return the index into the line
3505 table for the pc of the nearest line whose number is >= the specified one.
3506 Return -1 if none is found. The value is >= 0 if it is an index.
3507 START is the index at which to start searching the line table.
3509 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3512 find_line_common (struct linetable
*l
, int lineno
,
3513 int *exact_match
, int start
)
3518 /* BEST is the smallest linenumber > LINENO so far seen,
3519 or 0 if none has been seen so far.
3520 BEST_INDEX identifies the item for it. */
3522 int best_index
= -1;
3533 for (i
= start
; i
< len
; i
++)
3535 struct linetable_entry
*item
= &(l
->item
[i
]);
3537 if (item
->line
== lineno
)
3539 /* Return the first (lowest address) entry which matches. */
3544 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3551 /* If we got here, we didn't get an exact match. */
3556 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3558 struct symtab_and_line sal
;
3560 sal
= find_pc_line (pc
, 0);
3563 return sal
.symtab
!= 0;
3566 /* Helper for find_function_start_sal. Does most of the work, except
3567 setting the sal's symbol. */
3569 static symtab_and_line
3570 find_function_start_sal_1 (CORE_ADDR func_addr
, obj_section
*section
,
3573 symtab_and_line sal
= find_pc_sect_line (func_addr
, section
, 0);
3575 if (funfirstline
&& sal
.symtab
!= NULL
3576 && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal
.symtab
))
3577 || SYMTAB_LANGUAGE (sal
.symtab
) == language_asm
))
3579 struct gdbarch
*gdbarch
= get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
3582 if (gdbarch_skip_entrypoint_p (gdbarch
))
3583 sal
.pc
= gdbarch_skip_entrypoint (gdbarch
, sal
.pc
);
3587 /* We always should have a line for the function start address.
3588 If we don't, something is odd. Create a plain SAL referring
3589 just the PC and hope that skip_prologue_sal (if requested)
3590 can find a line number for after the prologue. */
3591 if (sal
.pc
< func_addr
)
3594 sal
.pspace
= current_program_space
;
3596 sal
.section
= section
;
3600 skip_prologue_sal (&sal
);
3608 find_function_start_sal (CORE_ADDR func_addr
, obj_section
*section
,
3612 = find_function_start_sal_1 (func_addr
, section
, funfirstline
);
3614 /* find_function_start_sal_1 does a linetable search, so it finds
3615 the symtab and linenumber, but not a symbol. Fill in the
3616 function symbol too. */
3617 sal
.symbol
= find_pc_sect_containing_function (sal
.pc
, sal
.section
);
3625 find_function_start_sal (symbol
*sym
, bool funfirstline
)
3627 fixup_symbol_section (sym
, NULL
);
3629 = find_function_start_sal_1 (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
)),
3630 SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
),
3637 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3638 address for that function that has an entry in SYMTAB's line info
3639 table. If such an entry cannot be found, return FUNC_ADDR
3643 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3645 CORE_ADDR func_start
, func_end
;
3646 struct linetable
*l
;
3649 /* Give up if this symbol has no lineinfo table. */
3650 l
= SYMTAB_LINETABLE (symtab
);
3654 /* Get the range for the function's PC values, or give up if we
3655 cannot, for some reason. */
3656 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3659 /* Linetable entries are ordered by PC values, see the commentary in
3660 symtab.h where `struct linetable' is defined. Thus, the first
3661 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3662 address we are looking for. */
3663 for (i
= 0; i
< l
->nitems
; i
++)
3665 struct linetable_entry
*item
= &(l
->item
[i
]);
3667 /* Don't use line numbers of zero, they mark special entries in
3668 the table. See the commentary on symtab.h before the
3669 definition of struct linetable. */
3670 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3677 /* Adjust SAL to the first instruction past the function prologue.
3678 If the PC was explicitly specified, the SAL is not changed.
3679 If the line number was explicitly specified then the SAL can still be
3680 updated, unless the language for SAL is assembler, in which case the SAL
3681 will be left unchanged.
3682 If SAL is already past the prologue, then do nothing. */
3685 skip_prologue_sal (struct symtab_and_line
*sal
)
3688 struct symtab_and_line start_sal
;
3689 CORE_ADDR pc
, saved_pc
;
3690 struct obj_section
*section
;
3692 struct objfile
*objfile
;
3693 struct gdbarch
*gdbarch
;
3694 const struct block
*b
, *function_block
;
3695 int force_skip
, skip
;
3697 /* Do not change the SAL if PC was specified explicitly. */
3698 if (sal
->explicit_pc
)
3701 /* In assembly code, if the user asks for a specific line then we should
3702 not adjust the SAL. The user already has instruction level
3703 visibility in this case, so selecting a line other than one requested
3704 is likely to be the wrong choice. */
3705 if (sal
->symtab
!= nullptr
3706 && sal
->explicit_line
3707 && SYMTAB_LANGUAGE (sal
->symtab
) == language_asm
)
3710 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
3712 switch_to_program_space_and_thread (sal
->pspace
);
3714 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3717 fixup_symbol_section (sym
, NULL
);
3719 objfile
= symbol_objfile (sym
);
3720 pc
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
));
3721 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3722 name
= SYMBOL_LINKAGE_NAME (sym
);
3726 struct bound_minimal_symbol msymbol
3727 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3729 if (msymbol
.minsym
== NULL
)
3732 objfile
= msymbol
.objfile
;
3733 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3734 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3735 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3738 gdbarch
= get_objfile_arch (objfile
);
3740 /* Process the prologue in two passes. In the first pass try to skip the
3741 prologue (SKIP is true) and verify there is a real need for it (indicated
3742 by FORCE_SKIP). If no such reason was found run a second pass where the
3743 prologue is not skipped (SKIP is false). */
3748 /* Be conservative - allow direct PC (without skipping prologue) only if we
3749 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3750 have to be set by the caller so we use SYM instead. */
3752 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3760 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3761 so that gdbarch_skip_prologue has something unique to work on. */
3762 if (section_is_overlay (section
) && !section_is_mapped (section
))
3763 pc
= overlay_unmapped_address (pc
, section
);
3765 /* Skip "first line" of function (which is actually its prologue). */
3766 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3767 if (gdbarch_skip_entrypoint_p (gdbarch
))
3768 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3770 pc
= gdbarch_skip_prologue_noexcept (gdbarch
, pc
);
3772 /* For overlays, map pc back into its mapped VMA range. */
3773 pc
= overlay_mapped_address (pc
, section
);
3775 /* Calculate line number. */
3776 start_sal
= find_pc_sect_line (pc
, section
, 0);
3778 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3779 line is still part of the same function. */
3780 if (skip
&& start_sal
.pc
!= pc
3781 && (sym
? (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3782 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3783 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3784 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3786 /* First pc of next line */
3788 /* Recalculate the line number (might not be N+1). */
3789 start_sal
= find_pc_sect_line (pc
, section
, 0);
3792 /* On targets with executable formats that don't have a concept of
3793 constructors (ELF with .init has, PE doesn't), gcc emits a call
3794 to `__main' in `main' between the prologue and before user
3796 if (gdbarch_skip_main_prologue_p (gdbarch
)
3797 && name
&& strcmp_iw (name
, "main") == 0)
3799 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3800 /* Recalculate the line number (might not be N+1). */
3801 start_sal
= find_pc_sect_line (pc
, section
, 0);
3805 while (!force_skip
&& skip
--);
3807 /* If we still don't have a valid source line, try to find the first
3808 PC in the lineinfo table that belongs to the same function. This
3809 happens with COFF debug info, which does not seem to have an
3810 entry in lineinfo table for the code after the prologue which has
3811 no direct relation to source. For example, this was found to be
3812 the case with the DJGPP target using "gcc -gcoff" when the
3813 compiler inserted code after the prologue to make sure the stack
3815 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3817 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3818 /* Recalculate the line number. */
3819 start_sal
= find_pc_sect_line (pc
, section
, 0);
3822 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3823 forward SAL to the end of the prologue. */
3828 sal
->section
= section
;
3829 sal
->symtab
= start_sal
.symtab
;
3830 sal
->line
= start_sal
.line
;
3831 sal
->end
= start_sal
.end
;
3833 /* Check if we are now inside an inlined function. If we can,
3834 use the call site of the function instead. */
3835 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3836 function_block
= NULL
;
3839 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3841 else if (BLOCK_FUNCTION (b
) != NULL
)
3843 b
= BLOCK_SUPERBLOCK (b
);
3845 if (function_block
!= NULL
3846 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3848 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3849 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3853 /* Given PC at the function's start address, attempt to find the
3854 prologue end using SAL information. Return zero if the skip fails.
3856 A non-optimized prologue traditionally has one SAL for the function
3857 and a second for the function body. A single line function has
3858 them both pointing at the same line.
3860 An optimized prologue is similar but the prologue may contain
3861 instructions (SALs) from the instruction body. Need to skip those
3862 while not getting into the function body.
3864 The functions end point and an increasing SAL line are used as
3865 indicators of the prologue's endpoint.
3867 This code is based on the function refine_prologue_limit
3871 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3873 struct symtab_and_line prologue_sal
;
3876 const struct block
*bl
;
3878 /* Get an initial range for the function. */
3879 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3880 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3882 prologue_sal
= find_pc_line (start_pc
, 0);
3883 if (prologue_sal
.line
!= 0)
3885 /* For languages other than assembly, treat two consecutive line
3886 entries at the same address as a zero-instruction prologue.
3887 The GNU assembler emits separate line notes for each instruction
3888 in a multi-instruction macro, but compilers generally will not
3890 if (prologue_sal
.symtab
->language
!= language_asm
)
3892 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3895 /* Skip any earlier lines, and any end-of-sequence marker
3896 from a previous function. */
3897 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3898 || linetable
->item
[idx
].line
== 0)
3901 if (idx
+1 < linetable
->nitems
3902 && linetable
->item
[idx
+1].line
!= 0
3903 && linetable
->item
[idx
+1].pc
== start_pc
)
3907 /* If there is only one sal that covers the entire function,
3908 then it is probably a single line function, like
3910 if (prologue_sal
.end
>= end_pc
)
3913 while (prologue_sal
.end
< end_pc
)
3915 struct symtab_and_line sal
;
3917 sal
= find_pc_line (prologue_sal
.end
, 0);
3920 /* Assume that a consecutive SAL for the same (or larger)
3921 line mark the prologue -> body transition. */
3922 if (sal
.line
>= prologue_sal
.line
)
3924 /* Likewise if we are in a different symtab altogether
3925 (e.g. within a file included via #include). */
3926 if (sal
.symtab
!= prologue_sal
.symtab
)
3929 /* The line number is smaller. Check that it's from the
3930 same function, not something inlined. If it's inlined,
3931 then there is no point comparing the line numbers. */
3932 bl
= block_for_pc (prologue_sal
.end
);
3935 if (block_inlined_p (bl
))
3937 if (BLOCK_FUNCTION (bl
))
3942 bl
= BLOCK_SUPERBLOCK (bl
);
3947 /* The case in which compiler's optimizer/scheduler has
3948 moved instructions into the prologue. We look ahead in
3949 the function looking for address ranges whose
3950 corresponding line number is less the first one that we
3951 found for the function. This is more conservative then
3952 refine_prologue_limit which scans a large number of SALs
3953 looking for any in the prologue. */
3958 if (prologue_sal
.end
< end_pc
)
3959 /* Return the end of this line, or zero if we could not find a
3961 return prologue_sal
.end
;
3963 /* Don't return END_PC, which is past the end of the function. */
3964 return prologue_sal
.pc
;
3970 find_function_alias_target (bound_minimal_symbol msymbol
)
3972 CORE_ADDR func_addr
;
3973 if (!msymbol_is_function (msymbol
.objfile
, msymbol
.minsym
, &func_addr
))
3976 symbol
*sym
= find_pc_function (func_addr
);
3978 && SYMBOL_CLASS (sym
) == LOC_BLOCK
3979 && BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
)) == func_addr
)
3986 /* If P is of the form "operator[ \t]+..." where `...' is
3987 some legitimate operator text, return a pointer to the
3988 beginning of the substring of the operator text.
3989 Otherwise, return "". */
3992 operator_chars (const char *p
, const char **end
)
3995 if (!startswith (p
, CP_OPERATOR_STR
))
3997 p
+= CP_OPERATOR_LEN
;
3999 /* Don't get faked out by `operator' being part of a longer
4001 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
4004 /* Allow some whitespace between `operator' and the operator symbol. */
4005 while (*p
== ' ' || *p
== '\t')
4008 /* Recognize 'operator TYPENAME'. */
4010 if (isalpha (*p
) || *p
== '_' || *p
== '$')
4012 const char *q
= p
+ 1;
4014 while (isalnum (*q
) || *q
== '_' || *q
== '$')
4023 case '\\': /* regexp quoting */
4026 if (p
[2] == '=') /* 'operator\*=' */
4028 else /* 'operator\*' */
4032 else if (p
[1] == '[')
4035 error (_("mismatched quoting on brackets, "
4036 "try 'operator\\[\\]'"));
4037 else if (p
[2] == '\\' && p
[3] == ']')
4039 *end
= p
+ 4; /* 'operator\[\]' */
4043 error (_("nothing is allowed between '[' and ']'"));
4047 /* Gratuitous quote: skip it and move on. */
4069 if (p
[0] == '-' && p
[1] == '>')
4071 /* Struct pointer member operator 'operator->'. */
4074 *end
= p
+ 3; /* 'operator->*' */
4077 else if (p
[2] == '\\')
4079 *end
= p
+ 4; /* Hopefully 'operator->\*' */
4084 *end
= p
+ 2; /* 'operator->' */
4088 if (p
[1] == '=' || p
[1] == p
[0])
4099 error (_("`operator ()' must be specified "
4100 "without whitespace in `()'"));
4105 error (_("`operator ?:' must be specified "
4106 "without whitespace in `?:'"));
4111 error (_("`operator []' must be specified "
4112 "without whitespace in `[]'"));
4116 error (_("`operator %s' not supported"), p
);
4125 /* What part to match in a file name. */
4127 struct filename_partial_match_opts
4129 /* Only match the directory name part. */
4130 bool dirname
= false;
4132 /* Only match the basename part. */
4133 bool basename
= false;
4136 /* Data structure to maintain printing state for output_source_filename. */
4138 struct output_source_filename_data
4140 /* Output only filenames matching REGEXP. */
4142 gdb::optional
<compiled_regex
> c_regexp
;
4143 /* Possibly only match a part of the filename. */
4144 filename_partial_match_opts partial_match
;
4147 /* Cache of what we've seen so far. */
4148 struct filename_seen_cache
*filename_seen_cache
;
4150 /* Flag of whether we're printing the first one. */
4154 /* Slave routine for sources_info. Force line breaks at ,'s.
4155 NAME is the name to print.
4156 DATA contains the state for printing and watching for duplicates. */
4159 output_source_filename (const char *name
,
4160 struct output_source_filename_data
*data
)
4162 /* Since a single source file can result in several partial symbol
4163 tables, we need to avoid printing it more than once. Note: if
4164 some of the psymtabs are read in and some are not, it gets
4165 printed both under "Source files for which symbols have been
4166 read" and "Source files for which symbols will be read in on
4167 demand". I consider this a reasonable way to deal with the
4168 situation. I'm not sure whether this can also happen for
4169 symtabs; it doesn't hurt to check. */
4171 /* Was NAME already seen? */
4172 if (data
->filename_seen_cache
->seen (name
))
4174 /* Yes; don't print it again. */
4178 /* Does it match data->regexp? */
4179 if (data
->c_regexp
.has_value ())
4181 const char *to_match
;
4182 std::string dirname
;
4184 if (data
->partial_match
.dirname
)
4186 dirname
= ldirname (name
);
4187 to_match
= dirname
.c_str ();
4189 else if (data
->partial_match
.basename
)
4190 to_match
= lbasename (name
);
4194 if (data
->c_regexp
->exec (to_match
, 0, NULL
, 0) != 0)
4198 /* Print it and reset *FIRST. */
4200 printf_filtered (", ");
4204 fputs_styled (name
, file_name_style
.style (), gdb_stdout
);
4207 /* A callback for map_partial_symbol_filenames. */
4210 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4213 output_source_filename (fullname
? fullname
: filename
,
4214 (struct output_source_filename_data
*) data
);
4217 using isrc_flag_option_def
4218 = gdb::option::flag_option_def
<filename_partial_match_opts
>;
4220 static const gdb::option::option_def info_sources_option_defs
[] = {
4222 isrc_flag_option_def
{
4224 [] (filename_partial_match_opts
*opts
) { return &opts
->dirname
; },
4225 N_("Show only the files having a dirname matching REGEXP."),
4228 isrc_flag_option_def
{
4230 [] (filename_partial_match_opts
*opts
) { return &opts
->basename
; },
4231 N_("Show only the files having a basename matching REGEXP."),
4236 /* Create an option_def_group for the "info sources" options, with
4237 ISRC_OPTS as context. */
4239 static inline gdb::option::option_def_group
4240 make_info_sources_options_def_group (filename_partial_match_opts
*isrc_opts
)
4242 return {{info_sources_option_defs
}, isrc_opts
};
4245 /* Prints the header message for the source files that will be printed
4246 with the matching info present in DATA. SYMBOL_MSG is a message
4247 that tells what will or has been done with the symbols of the
4248 matching source files. */
4251 print_info_sources_header (const char *symbol_msg
,
4252 const struct output_source_filename_data
*data
)
4254 puts_filtered (symbol_msg
);
4255 if (!data
->regexp
.empty ())
4257 if (data
->partial_match
.dirname
)
4258 printf_filtered (_("(dirname matching regular expression \"%s\")"),
4259 data
->regexp
.c_str ());
4260 else if (data
->partial_match
.basename
)
4261 printf_filtered (_("(basename matching regular expression \"%s\")"),
4262 data
->regexp
.c_str ());
4264 printf_filtered (_("(filename matching regular expression \"%s\")"),
4265 data
->regexp
.c_str ());
4267 puts_filtered ("\n");
4270 /* Completer for "info sources". */
4273 info_sources_command_completer (cmd_list_element
*ignore
,
4274 completion_tracker
&tracker
,
4275 const char *text
, const char *word
)
4277 const auto group
= make_info_sources_options_def_group (nullptr);
4278 if (gdb::option::complete_options
4279 (tracker
, &text
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
))
4284 info_sources_command (const char *args
, int from_tty
)
4286 struct output_source_filename_data data
;
4288 if (!have_full_symbols () && !have_partial_symbols ())
4290 error (_("No symbol table is loaded. Use the \"file\" command."));
4293 filename_seen_cache filenames_seen
;
4295 auto group
= make_info_sources_options_def_group (&data
.partial_match
);
4297 gdb::option::process_options
4298 (&args
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_ERROR
, group
);
4300 if (args
!= NULL
&& *args
!= '\000')
4303 data
.filename_seen_cache
= &filenames_seen
;
4306 if (data
.partial_match
.dirname
&& data
.partial_match
.basename
)
4307 error (_("You cannot give both -basename and -dirname to 'info sources'."));
4308 if ((data
.partial_match
.dirname
|| data
.partial_match
.basename
)
4309 && data
.regexp
.empty ())
4310 error (_("Missing REGEXP for 'info sources'."));
4312 if (data
.regexp
.empty ())
4313 data
.c_regexp
.reset ();
4316 int cflags
= REG_NOSUB
;
4317 #ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
4318 cflags
|= REG_ICASE
;
4320 data
.c_regexp
.emplace (data
.regexp
.c_str (), cflags
,
4321 _("Invalid regexp"));
4324 print_info_sources_header
4325 (_("Source files for which symbols have been read in:\n"), &data
);
4327 for (objfile
*objfile
: current_program_space
->objfiles ())
4329 for (compunit_symtab
*cu
: objfile
->compunits ())
4331 for (symtab
*s
: compunit_filetabs (cu
))
4333 const char *fullname
= symtab_to_fullname (s
);
4335 output_source_filename (fullname
, &data
);
4339 printf_filtered ("\n\n");
4341 print_info_sources_header
4342 (_("Source files for which symbols will be read in on demand:\n"), &data
);
4344 filenames_seen
.clear ();
4346 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4347 1 /*need_fullname*/);
4348 printf_filtered ("\n");
4351 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4352 non-zero compare only lbasename of FILES. */
4355 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4359 if (file
!= NULL
&& nfiles
!= 0)
4361 for (i
= 0; i
< nfiles
; i
++)
4363 if (compare_filenames_for_search (file
, (basenames
4364 ? lbasename (files
[i
])
4369 else if (nfiles
== 0)
4374 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4375 sort symbols, not minimal symbols. */
4378 symbol_search::compare_search_syms (const symbol_search
&sym_a
,
4379 const symbol_search
&sym_b
)
4383 c
= FILENAME_CMP (symbol_symtab (sym_a
.symbol
)->filename
,
4384 symbol_symtab (sym_b
.symbol
)->filename
);
4388 if (sym_a
.block
!= sym_b
.block
)
4389 return sym_a
.block
- sym_b
.block
;
4391 return strcmp (SYMBOL_PRINT_NAME (sym_a
.symbol
),
4392 SYMBOL_PRINT_NAME (sym_b
.symbol
));
4395 /* Returns true if the type_name of symbol_type of SYM matches TREG.
4396 If SYM has no symbol_type or symbol_name, returns false. */
4399 treg_matches_sym_type_name (const compiled_regex
&treg
,
4400 const struct symbol
*sym
)
4402 struct type
*sym_type
;
4403 std::string printed_sym_type_name
;
4405 if (symbol_lookup_debug
> 1)
4407 fprintf_unfiltered (gdb_stdlog
,
4408 "treg_matches_sym_type_name\n sym %s\n",
4409 SYMBOL_NATURAL_NAME (sym
));
4412 sym_type
= SYMBOL_TYPE (sym
);
4413 if (sym_type
== NULL
)
4417 scoped_switch_to_sym_language_if_auto
l (sym
);
4419 printed_sym_type_name
= type_to_string (sym_type
);
4423 if (symbol_lookup_debug
> 1)
4425 fprintf_unfiltered (gdb_stdlog
,
4426 " sym_type_name %s\n",
4427 printed_sym_type_name
.c_str ());
4431 if (printed_sym_type_name
.empty ())
4434 return treg
.exec (printed_sym_type_name
.c_str (), 0, NULL
, 0) == 0;
4438 /* Sort the symbols in RESULT and remove duplicates. */
4441 sort_search_symbols_remove_dups (std::vector
<symbol_search
> *result
)
4443 std::sort (result
->begin (), result
->end ());
4444 result
->erase (std::unique (result
->begin (), result
->end ()),
4448 /* Search the symbol table for matches to the regular expression REGEXP,
4449 returning the results.
4451 Only symbols of KIND are searched:
4452 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4453 and constants (enums).
4454 if T_REGEXP is not NULL, only returns var that have
4455 a type matching regular expression T_REGEXP.
4456 FUNCTIONS_DOMAIN - search all functions
4457 TYPES_DOMAIN - search all type names
4458 ALL_DOMAIN - an internal error for this function
4460 Within each file the results are sorted locally; each symtab's global and
4461 static blocks are separately alphabetized.
4462 Duplicate entries are removed.
4464 When EXCLUDE_MINSYMS is false then matching minsyms are also returned,
4465 otherwise they are excluded. */
4467 std::vector
<symbol_search
>
4468 search_symbols (const char *regexp
, enum search_domain kind
,
4469 const char *t_regexp
,
4470 int nfiles
, const char *files
[],
4471 bool exclude_minsyms
)
4473 const struct blockvector
*bv
;
4474 const struct block
*b
;
4476 struct block_iterator iter
;
4479 static const enum minimal_symbol_type types
[]
4480 = {mst_data
, mst_text
, mst_unknown
};
4481 static const enum minimal_symbol_type types2
[]
4482 = {mst_bss
, mst_file_text
, mst_unknown
};
4483 static const enum minimal_symbol_type types3
[]
4484 = {mst_file_data
, mst_solib_trampoline
, mst_unknown
};
4485 static const enum minimal_symbol_type types4
[]
4486 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_unknown
};
4487 enum minimal_symbol_type ourtype
;
4488 enum minimal_symbol_type ourtype2
;
4489 enum minimal_symbol_type ourtype3
;
4490 enum minimal_symbol_type ourtype4
;
4491 std::vector
<symbol_search
> result
;
4492 gdb::optional
<compiled_regex
> preg
;
4493 gdb::optional
<compiled_regex
> treg
;
4495 gdb_assert (kind
<= TYPES_DOMAIN
);
4497 ourtype
= types
[kind
];
4498 ourtype2
= types2
[kind
];
4499 ourtype3
= types3
[kind
];
4500 ourtype4
= types4
[kind
];
4504 /* Make sure spacing is right for C++ operators.
4505 This is just a courtesy to make the matching less sensitive
4506 to how many spaces the user leaves between 'operator'
4507 and <TYPENAME> or <OPERATOR>. */
4509 const char *opname
= operator_chars (regexp
, &opend
);
4513 int fix
= -1; /* -1 means ok; otherwise number of
4516 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4518 /* There should 1 space between 'operator' and 'TYPENAME'. */
4519 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4524 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4525 if (opname
[-1] == ' ')
4528 /* If wrong number of spaces, fix it. */
4531 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4533 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4538 int cflags
= REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4540 preg
.emplace (regexp
, cflags
, _("Invalid regexp"));
4543 if (t_regexp
!= NULL
)
4545 int cflags
= REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4547 treg
.emplace (t_regexp
, cflags
, _("Invalid regexp"));
4550 /* Search through the partial symtabs *first* for all symbols
4551 matching the regexp. That way we don't have to reproduce all of
4552 the machinery below. */
4553 expand_symtabs_matching ([&] (const char *filename
, bool basenames
)
4555 return file_matches (filename
, files
, nfiles
,
4558 lookup_name_info::match_any (),
4559 [&] (const char *symname
)
4561 return (!preg
.has_value ()
4562 || preg
->exec (symname
,
4568 /* Here, we search through the minimal symbol tables for functions
4569 and variables that match, and force their symbols to be read.
4570 This is in particular necessary for demangled variable names,
4571 which are no longer put into the partial symbol tables.
4572 The symbol will then be found during the scan of symtabs below.
4574 For functions, find_pc_symtab should succeed if we have debug info
4575 for the function, for variables we have to call
4576 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4578 If the lookup fails, set found_misc so that we will rescan to print
4579 any matching symbols without debug info.
4580 We only search the objfile the msymbol came from, we no longer search
4581 all objfiles. In large programs (1000s of shared libs) searching all
4582 objfiles is not worth the pain. */
4584 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4586 for (objfile
*objfile
: current_program_space
->objfiles ())
4588 for (minimal_symbol
*msymbol
: objfile
->msymbols ())
4592 if (msymbol
->created_by_gdb
)
4595 if (MSYMBOL_TYPE (msymbol
) == ourtype
4596 || MSYMBOL_TYPE (msymbol
) == ourtype2
4597 || MSYMBOL_TYPE (msymbol
) == ourtype3
4598 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4600 if (!preg
.has_value ()
4601 || preg
->exec (MSYMBOL_NATURAL_NAME (msymbol
), 0,
4604 /* Note: An important side-effect of these
4605 lookup functions is to expand the symbol
4606 table if msymbol is found, for the benefit of
4607 the next loop on compunits. */
4608 if (kind
== FUNCTIONS_DOMAIN
4609 ? (find_pc_compunit_symtab
4610 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
))
4612 : (lookup_symbol_in_objfile_from_linkage_name
4613 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
),
4623 for (objfile
*objfile
: current_program_space
->objfiles ())
4625 for (compunit_symtab
*cust
: objfile
->compunits ())
4627 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4628 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4630 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4631 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4633 struct symtab
*real_symtab
= symbol_symtab (sym
);
4637 /* Check first sole REAL_SYMTAB->FILENAME. It does
4638 not need to be a substring of symtab_to_fullname as
4639 it may contain "./" etc. */
4640 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4641 || ((basenames_may_differ
4642 || file_matches (lbasename (real_symtab
->filename
),
4644 && file_matches (symtab_to_fullname (real_symtab
),
4646 && ((!preg
.has_value ()
4647 || preg
->exec (SYMBOL_NATURAL_NAME (sym
), 0,
4649 && ((kind
== VARIABLES_DOMAIN
4650 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4651 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4652 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4653 /* LOC_CONST can be used for more than
4654 just enums, e.g., c++ static const
4655 members. We only want to skip enums
4657 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4658 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4660 && (!treg
.has_value ()
4661 || treg_matches_sym_type_name (*treg
, sym
)))
4662 || (kind
== FUNCTIONS_DOMAIN
4663 && SYMBOL_CLASS (sym
) == LOC_BLOCK
4664 && (!treg
.has_value ()
4665 || treg_matches_sym_type_name (*treg
,
4667 || (kind
== TYPES_DOMAIN
4668 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4669 && SYMBOL_DOMAIN (sym
) != MODULE_DOMAIN
))))
4672 result
.emplace_back (i
, sym
);
4679 if (!result
.empty ())
4680 sort_search_symbols_remove_dups (&result
);
4682 /* If there are no eyes, avoid all contact. I mean, if there are
4683 no debug symbols, then add matching minsyms. But if the user wants
4684 to see symbols matching a type regexp, then never give a minimal symbol,
4685 as we assume that a minimal symbol does not have a type. */
4687 if ((found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4689 && !treg
.has_value ())
4691 for (objfile
*objfile
: current_program_space
->objfiles ())
4693 for (minimal_symbol
*msymbol
: objfile
->msymbols ())
4697 if (msymbol
->created_by_gdb
)
4700 if (MSYMBOL_TYPE (msymbol
) == ourtype
4701 || MSYMBOL_TYPE (msymbol
) == ourtype2
4702 || MSYMBOL_TYPE (msymbol
) == ourtype3
4703 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4705 if (!preg
.has_value ()
4706 || preg
->exec (MSYMBOL_NATURAL_NAME (msymbol
), 0,
4709 /* For functions we can do a quick check of whether the
4710 symbol might be found via find_pc_symtab. */
4711 if (kind
!= FUNCTIONS_DOMAIN
4712 || (find_pc_compunit_symtab
4713 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
))
4716 if (lookup_symbol_in_objfile_from_linkage_name
4717 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
),
4722 result
.emplace_back (i
, msymbol
, objfile
);
4734 /* Helper function for symtab_symbol_info, this function uses
4735 the data returned from search_symbols() to print information
4736 regarding the match to gdb_stdout. If LAST is not NULL,
4737 print file and line number information for the symbol as
4738 well. Skip printing the filename if it matches LAST. */
4741 print_symbol_info (enum search_domain kind
,
4743 int block
, const char *last
)
4745 scoped_switch_to_sym_language_if_auto
l (sym
);
4746 struct symtab
*s
= symbol_symtab (sym
);
4750 const char *s_filename
= symtab_to_filename_for_display (s
);
4752 if (filename_cmp (last
, s_filename
) != 0)
4754 printf_filtered (_("\nFile %ps:\n"),
4755 styled_string (file_name_style
.style (),
4759 if (SYMBOL_LINE (sym
) != 0)
4760 printf_filtered ("%d:\t", SYMBOL_LINE (sym
));
4762 puts_filtered ("\t");
4765 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4766 printf_filtered ("static ");
4768 /* Typedef that is not a C++ class. */
4769 if (kind
== TYPES_DOMAIN
4770 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4772 /* FIXME: For C (and C++) we end up with a difference in output here
4773 between how a typedef is printed, and non-typedefs are printed.
4774 The TYPEDEF_PRINT code places a ";" at the end in an attempt to
4775 appear C-like, while TYPE_PRINT doesn't.
4777 For the struct printing case below, things are worse, we force
4778 printing of the ";" in this function, which is going to be wrong
4779 for languages that don't require a ";" between statements. */
4780 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_TYPEDEF
)
4781 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4784 type_print (SYMBOL_TYPE (sym
), "", gdb_stdout
, -1);
4785 printf_filtered ("\n");
4788 /* variable, func, or typedef-that-is-c++-class. */
4789 else if (kind
< TYPES_DOMAIN
4790 || (kind
== TYPES_DOMAIN
4791 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4793 type_print (SYMBOL_TYPE (sym
),
4794 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4795 ? "" : SYMBOL_PRINT_NAME (sym
)),
4798 printf_filtered (";\n");
4802 /* This help function for symtab_symbol_info() prints information
4803 for non-debugging symbols to gdb_stdout. */
4806 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4808 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4811 if (gdbarch_addr_bit (gdbarch
) <= 32)
4812 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4813 & (CORE_ADDR
) 0xffffffff,
4816 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4819 ui_file_style sym_style
= (msymbol
.minsym
->text_p ()
4820 ? function_name_style
.style ()
4821 : ui_file_style ());
4823 printf_filtered (_("%ps %ps\n"),
4824 styled_string (address_style
.style (), tmp
),
4825 styled_string (sym_style
,
4826 MSYMBOL_PRINT_NAME (msymbol
.minsym
)));
4829 /* This is the guts of the commands "info functions", "info types", and
4830 "info variables". It calls search_symbols to find all matches and then
4831 print_[m]symbol_info to print out some useful information about the
4835 symtab_symbol_info (bool quiet
, bool exclude_minsyms
,
4836 const char *regexp
, enum search_domain kind
,
4837 const char *t_regexp
, int from_tty
)
4839 static const char * const classnames
[] =
4840 {"variable", "function", "type"};
4841 const char *last_filename
= "";
4844 gdb_assert (kind
<= TYPES_DOMAIN
);
4846 if (regexp
!= nullptr && *regexp
== '\0')
4849 /* Must make sure that if we're interrupted, symbols gets freed. */
4850 std::vector
<symbol_search
> symbols
= search_symbols (regexp
, kind
,
4858 if (t_regexp
!= NULL
)
4860 (_("All %ss matching regular expression \"%s\""
4861 " with type matching regular expression \"%s\":\n"),
4862 classnames
[kind
], regexp
, t_regexp
);
4864 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4865 classnames
[kind
], regexp
);
4869 if (t_regexp
!= NULL
)
4871 (_("All defined %ss"
4872 " with type matching regular expression \"%s\" :\n"),
4873 classnames
[kind
], t_regexp
);
4875 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4879 for (const symbol_search
&p
: symbols
)
4883 if (p
.msymbol
.minsym
!= NULL
)
4888 printf_filtered (_("\nNon-debugging symbols:\n"));
4891 print_msymbol_info (p
.msymbol
);
4895 print_symbol_info (kind
,
4900 = symtab_to_filename_for_display (symbol_symtab (p
.symbol
));
4905 /* Structure to hold the values of the options used by the 'info variables'
4906 and 'info functions' commands. These correspond to the -q, -t, and -n
4909 struct info_print_options
4912 bool exclude_minsyms
= false;
4913 char *type_regexp
= nullptr;
4915 ~info_print_options ()
4917 xfree (type_regexp
);
4921 /* The options used by the 'info variables' and 'info functions'
4924 static const gdb::option::option_def info_print_options_defs
[] = {
4925 gdb::option::boolean_option_def
<info_print_options
> {
4927 [] (info_print_options
*opt
) { return &opt
->quiet
; },
4928 nullptr, /* show_cmd_cb */
4929 nullptr /* set_doc */
4932 gdb::option::boolean_option_def
<info_print_options
> {
4934 [] (info_print_options
*opt
) { return &opt
->exclude_minsyms
; },
4935 nullptr, /* show_cmd_cb */
4936 nullptr /* set_doc */
4939 gdb::option::string_option_def
<info_print_options
> {
4941 [] (info_print_options
*opt
) { return &opt
->type_regexp
; },
4942 nullptr, /* show_cmd_cb */
4943 nullptr /* set_doc */
4947 /* Returns the option group used by 'info variables' and 'info
4950 static gdb::option::option_def_group
4951 make_info_print_options_def_group (info_print_options
*opts
)
4953 return {{info_print_options_defs
}, opts
};
4956 /* Command completer for 'info variables' and 'info functions'. */
4959 info_print_command_completer (struct cmd_list_element
*ignore
,
4960 completion_tracker
&tracker
,
4961 const char *text
, const char * /* word */)
4964 = make_info_print_options_def_group (nullptr);
4965 if (gdb::option::complete_options
4966 (tracker
, &text
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
))
4969 const char *word
= advance_to_expression_complete_word_point (tracker
, text
);
4970 symbol_completer (ignore
, tracker
, text
, word
);
4973 /* Implement the 'info variables' command. */
4976 info_variables_command (const char *args
, int from_tty
)
4978 info_print_options opts
;
4979 auto grp
= make_info_print_options_def_group (&opts
);
4980 gdb::option::process_options
4981 (&args
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, grp
);
4982 if (args
!= nullptr && *args
== '\0')
4985 symtab_symbol_info (opts
.quiet
, opts
.exclude_minsyms
, args
, VARIABLES_DOMAIN
,
4986 opts
.type_regexp
, from_tty
);
4989 /* Implement the 'info functions' command. */
4992 info_functions_command (const char *args
, int from_tty
)
4994 info_print_options opts
;
4995 auto grp
= make_info_print_options_def_group (&opts
);
4996 gdb::option::process_options
4997 (&args
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, grp
);
4998 if (args
!= nullptr && *args
== '\0')
5001 symtab_symbol_info (opts
.quiet
, opts
.exclude_minsyms
, args
,
5002 FUNCTIONS_DOMAIN
, opts
.type_regexp
, from_tty
);
5005 /* Holds the -q option for the 'info types' command. */
5007 struct info_types_options
5012 /* The options used by the 'info types' command. */
5014 static const gdb::option::option_def info_types_options_defs
[] = {
5015 gdb::option::boolean_option_def
<info_types_options
> {
5017 [] (info_types_options
*opt
) { return &opt
->quiet
; },
5018 nullptr, /* show_cmd_cb */
5019 nullptr /* set_doc */
5023 /* Returns the option group used by 'info types'. */
5025 static gdb::option::option_def_group
5026 make_info_types_options_def_group (info_types_options
*opts
)
5028 return {{info_types_options_defs
}, opts
};
5031 /* Implement the 'info types' command. */
5034 info_types_command (const char *args
, int from_tty
)
5036 info_types_options opts
;
5038 auto grp
= make_info_types_options_def_group (&opts
);
5039 gdb::option::process_options
5040 (&args
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, grp
);
5041 if (args
!= nullptr && *args
== '\0')
5043 symtab_symbol_info (opts
.quiet
, false, args
, TYPES_DOMAIN
, NULL
, from_tty
);
5046 /* Command completer for 'info types' command. */
5049 info_types_command_completer (struct cmd_list_element
*ignore
,
5050 completion_tracker
&tracker
,
5051 const char *text
, const char * /* word */)
5054 = make_info_types_options_def_group (nullptr);
5055 if (gdb::option::complete_options
5056 (tracker
, &text
, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND
, group
))
5059 const char *word
= advance_to_expression_complete_word_point (tracker
, text
);
5060 symbol_completer (ignore
, tracker
, text
, word
);
5063 /* Breakpoint all functions matching regular expression. */
5066 rbreak_command_wrapper (char *regexp
, int from_tty
)
5068 rbreak_command (regexp
, from_tty
);
5072 rbreak_command (const char *regexp
, int from_tty
)
5075 const char **files
= NULL
;
5076 const char *file_name
;
5081 const char *colon
= strchr (regexp
, ':');
5083 if (colon
&& *(colon
+ 1) != ':')
5088 colon_index
= colon
- regexp
;
5089 local_name
= (char *) alloca (colon_index
+ 1);
5090 memcpy (local_name
, regexp
, colon_index
);
5091 local_name
[colon_index
--] = 0;
5092 while (isspace (local_name
[colon_index
]))
5093 local_name
[colon_index
--] = 0;
5094 file_name
= local_name
;
5097 regexp
= skip_spaces (colon
+ 1);
5101 std::vector
<symbol_search
> symbols
= search_symbols (regexp
,
5107 scoped_rbreak_breakpoints finalize
;
5108 for (const symbol_search
&p
: symbols
)
5110 if (p
.msymbol
.minsym
== NULL
)
5112 struct symtab
*symtab
= symbol_symtab (p
.symbol
);
5113 const char *fullname
= symtab_to_fullname (symtab
);
5115 string
= string_printf ("%s:'%s'", fullname
,
5116 SYMBOL_LINKAGE_NAME (p
.symbol
));
5117 break_command (&string
[0], from_tty
);
5118 print_symbol_info (FUNCTIONS_DOMAIN
, p
.symbol
, p
.block
, NULL
);
5122 string
= string_printf ("'%s'",
5123 MSYMBOL_LINKAGE_NAME (p
.msymbol
.minsym
));
5125 break_command (&string
[0], from_tty
);
5126 printf_filtered ("<function, no debug info> %s;\n",
5127 MSYMBOL_PRINT_NAME (p
.msymbol
.minsym
));
5133 /* Evaluate if SYMNAME matches LOOKUP_NAME. */
5136 compare_symbol_name (const char *symbol_name
, language symbol_language
,
5137 const lookup_name_info
&lookup_name
,
5138 completion_match_result
&match_res
)
5140 const language_defn
*lang
= language_def (symbol_language
);
5142 symbol_name_matcher_ftype
*name_match
5143 = get_symbol_name_matcher (lang
, lookup_name
);
5145 return name_match (symbol_name
, lookup_name
, &match_res
);
5151 completion_list_add_name (completion_tracker
&tracker
,
5152 language symbol_language
,
5153 const char *symname
,
5154 const lookup_name_info
&lookup_name
,
5155 const char *text
, const char *word
)
5157 completion_match_result
&match_res
5158 = tracker
.reset_completion_match_result ();
5160 /* Clip symbols that cannot match. */
5161 if (!compare_symbol_name (symname
, symbol_language
, lookup_name
, match_res
))
5164 /* Refresh SYMNAME from the match string. It's potentially
5165 different depending on language. (E.g., on Ada, the match may be
5166 the encoded symbol name wrapped in "<>"). */
5167 symname
= match_res
.match
.match ();
5168 gdb_assert (symname
!= NULL
);
5170 /* We have a match for a completion, so add SYMNAME to the current list
5171 of matches. Note that the name is moved to freshly malloc'd space. */
5174 gdb::unique_xmalloc_ptr
<char> completion
5175 = make_completion_match_str (symname
, text
, word
);
5177 /* Here we pass the match-for-lcd object to add_completion. Some
5178 languages match the user text against substrings of symbol
5179 names in some cases. E.g., in C++, "b push_ba" completes to
5180 "std::vector::push_back", "std::string::push_back", etc., and
5181 in this case we want the completion lowest common denominator
5182 to be "push_back" instead of "std::". */
5183 tracker
.add_completion (std::move (completion
),
5184 &match_res
.match_for_lcd
, text
, word
);
5188 /* completion_list_add_name wrapper for struct symbol. */
5191 completion_list_add_symbol (completion_tracker
&tracker
,
5193 const lookup_name_info
&lookup_name
,
5194 const char *text
, const char *word
)
5196 completion_list_add_name (tracker
, SYMBOL_LANGUAGE (sym
),
5197 SYMBOL_NATURAL_NAME (sym
),
5198 lookup_name
, text
, word
);
5201 /* completion_list_add_name wrapper for struct minimal_symbol. */
5204 completion_list_add_msymbol (completion_tracker
&tracker
,
5205 minimal_symbol
*sym
,
5206 const lookup_name_info
&lookup_name
,
5207 const char *text
, const char *word
)
5209 completion_list_add_name (tracker
, MSYMBOL_LANGUAGE (sym
),
5210 MSYMBOL_NATURAL_NAME (sym
),
5211 lookup_name
, text
, word
);
5215 /* ObjC: In case we are completing on a selector, look as the msymbol
5216 again and feed all the selectors into the mill. */
5219 completion_list_objc_symbol (completion_tracker
&tracker
,
5220 struct minimal_symbol
*msymbol
,
5221 const lookup_name_info
&lookup_name
,
5222 const char *text
, const char *word
)
5224 static char *tmp
= NULL
;
5225 static unsigned int tmplen
= 0;
5227 const char *method
, *category
, *selector
;
5230 method
= MSYMBOL_NATURAL_NAME (msymbol
);
5232 /* Is it a method? */
5233 if ((method
[0] != '-') && (method
[0] != '+'))
5237 /* Complete on shortened method method. */
5238 completion_list_add_name (tracker
, language_objc
,
5243 while ((strlen (method
) + 1) >= tmplen
)
5249 tmp
= (char *) xrealloc (tmp
, tmplen
);
5251 selector
= strchr (method
, ' ');
5252 if (selector
!= NULL
)
5255 category
= strchr (method
, '(');
5257 if ((category
!= NULL
) && (selector
!= NULL
))
5259 memcpy (tmp
, method
, (category
- method
));
5260 tmp
[category
- method
] = ' ';
5261 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
5262 completion_list_add_name (tracker
, language_objc
, tmp
,
5263 lookup_name
, text
, word
);
5265 completion_list_add_name (tracker
, language_objc
, tmp
+ 1,
5266 lookup_name
, text
, word
);
5269 if (selector
!= NULL
)
5271 /* Complete on selector only. */
5272 strcpy (tmp
, selector
);
5273 tmp2
= strchr (tmp
, ']');
5277 completion_list_add_name (tracker
, language_objc
, tmp
,
5278 lookup_name
, text
, word
);
5282 /* Break the non-quoted text based on the characters which are in
5283 symbols. FIXME: This should probably be language-specific. */
5286 language_search_unquoted_string (const char *text
, const char *p
)
5288 for (; p
> text
; --p
)
5290 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5294 if ((current_language
->la_language
== language_objc
))
5296 if (p
[-1] == ':') /* Might be part of a method name. */
5298 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5299 p
-= 2; /* Beginning of a method name. */
5300 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5301 { /* Might be part of a method name. */
5304 /* Seeing a ' ' or a '(' is not conclusive evidence
5305 that we are in the middle of a method name. However,
5306 finding "-[" or "+[" should be pretty un-ambiguous.
5307 Unfortunately we have to find it now to decide. */
5310 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5311 t
[-1] == ' ' || t
[-1] == ':' ||
5312 t
[-1] == '(' || t
[-1] == ')')
5317 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5318 p
= t
- 2; /* Method name detected. */
5319 /* Else we leave with p unchanged. */
5329 completion_list_add_fields (completion_tracker
&tracker
,
5331 const lookup_name_info
&lookup_name
,
5332 const char *text
, const char *word
)
5334 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5336 struct type
*t
= SYMBOL_TYPE (sym
);
5337 enum type_code c
= TYPE_CODE (t
);
5340 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5341 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5342 if (TYPE_FIELD_NAME (t
, j
))
5343 completion_list_add_name (tracker
, SYMBOL_LANGUAGE (sym
),
5344 TYPE_FIELD_NAME (t
, j
),
5345 lookup_name
, text
, word
);
5352 symbol_is_function_or_method (symbol
*sym
)
5354 switch (TYPE_CODE (SYMBOL_TYPE (sym
)))
5356 case TYPE_CODE_FUNC
:
5357 case TYPE_CODE_METHOD
:
5367 symbol_is_function_or_method (minimal_symbol
*msymbol
)
5369 switch (MSYMBOL_TYPE (msymbol
))
5372 case mst_text_gnu_ifunc
:
5373 case mst_solib_trampoline
:
5383 bound_minimal_symbol
5384 find_gnu_ifunc (const symbol
*sym
)
5386 if (SYMBOL_CLASS (sym
) != LOC_BLOCK
)
5389 lookup_name_info
lookup_name (SYMBOL_SEARCH_NAME (sym
),
5390 symbol_name_match_type::SEARCH_NAME
);
5391 struct objfile
*objfile
= symbol_objfile (sym
);
5393 CORE_ADDR address
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
));
5394 minimal_symbol
*ifunc
= NULL
;
5396 iterate_over_minimal_symbols (objfile
, lookup_name
,
5397 [&] (minimal_symbol
*minsym
)
5399 if (MSYMBOL_TYPE (minsym
) == mst_text_gnu_ifunc
5400 || MSYMBOL_TYPE (minsym
) == mst_data_gnu_ifunc
)
5402 CORE_ADDR msym_addr
= MSYMBOL_VALUE_ADDRESS (objfile
, minsym
);
5403 if (MSYMBOL_TYPE (minsym
) == mst_data_gnu_ifunc
)
5405 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5407 = gdbarch_convert_from_func_ptr_addr (gdbarch
,
5409 current_top_target ());
5411 if (msym_addr
== address
)
5421 return {ifunc
, objfile
};
5425 /* Add matching symbols from SYMTAB to the current completion list. */
5428 add_symtab_completions (struct compunit_symtab
*cust
,
5429 completion_tracker
&tracker
,
5430 complete_symbol_mode mode
,
5431 const lookup_name_info
&lookup_name
,
5432 const char *text
, const char *word
,
5433 enum type_code code
)
5436 const struct block
*b
;
5437 struct block_iterator iter
;
5443 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5446 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5447 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5449 if (completion_skip_symbol (mode
, sym
))
5452 if (code
== TYPE_CODE_UNDEF
5453 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5454 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5455 completion_list_add_symbol (tracker
, sym
,
5463 default_collect_symbol_completion_matches_break_on
5464 (completion_tracker
&tracker
, complete_symbol_mode mode
,
5465 symbol_name_match_type name_match_type
,
5466 const char *text
, const char *word
,
5467 const char *break_on
, enum type_code code
)
5469 /* Problem: All of the symbols have to be copied because readline
5470 frees them. I'm not going to worry about this; hopefully there
5471 won't be that many. */
5474 const struct block
*b
;
5475 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5476 struct block_iterator iter
;
5477 /* The symbol we are completing on. Points in same buffer as text. */
5478 const char *sym_text
;
5480 /* Now look for the symbol we are supposed to complete on. */
5481 if (mode
== complete_symbol_mode::LINESPEC
)
5487 const char *quote_pos
= NULL
;
5489 /* First see if this is a quoted string. */
5491 for (p
= text
; *p
!= '\0'; ++p
)
5493 if (quote_found
!= '\0')
5495 if (*p
== quote_found
)
5496 /* Found close quote. */
5498 else if (*p
== '\\' && p
[1] == quote_found
)
5499 /* A backslash followed by the quote character
5500 doesn't end the string. */
5503 else if (*p
== '\'' || *p
== '"')
5509 if (quote_found
== '\'')
5510 /* A string within single quotes can be a symbol, so complete on it. */
5511 sym_text
= quote_pos
+ 1;
5512 else if (quote_found
== '"')
5513 /* A double-quoted string is never a symbol, nor does it make sense
5514 to complete it any other way. */
5520 /* It is not a quoted string. Break it based on the characters
5521 which are in symbols. */
5524 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5525 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5534 lookup_name_info
lookup_name (sym_text
, name_match_type
, true);
5536 /* At this point scan through the misc symbol vectors and add each
5537 symbol you find to the list. Eventually we want to ignore
5538 anything that isn't a text symbol (everything else will be
5539 handled by the psymtab code below). */
5541 if (code
== TYPE_CODE_UNDEF
)
5543 for (objfile
*objfile
: current_program_space
->objfiles ())
5545 for (minimal_symbol
*msymbol
: objfile
->msymbols ())
5549 if (completion_skip_symbol (mode
, msymbol
))
5552 completion_list_add_msymbol (tracker
, msymbol
, lookup_name
,
5555 completion_list_objc_symbol (tracker
, msymbol
, lookup_name
,
5561 /* Add completions for all currently loaded symbol tables. */
5562 for (objfile
*objfile
: current_program_space
->objfiles ())
5564 for (compunit_symtab
*cust
: objfile
->compunits ())
5565 add_symtab_completions (cust
, tracker
, mode
, lookup_name
,
5566 sym_text
, word
, code
);
5569 /* Look through the partial symtabs for all symbols which begin by
5570 matching SYM_TEXT. Expand all CUs that you find to the list. */
5571 expand_symtabs_matching (NULL
,
5574 [&] (compunit_symtab
*symtab
) /* expansion notify */
5576 add_symtab_completions (symtab
,
5577 tracker
, mode
, lookup_name
,
5578 sym_text
, word
, code
);
5582 /* Search upwards from currently selected frame (so that we can
5583 complete on local vars). Also catch fields of types defined in
5584 this places which match our text string. Only complete on types
5585 visible from current context. */
5587 b
= get_selected_block (0);
5588 surrounding_static_block
= block_static_block (b
);
5589 surrounding_global_block
= block_global_block (b
);
5590 if (surrounding_static_block
!= NULL
)
5591 while (b
!= surrounding_static_block
)
5595 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5597 if (code
== TYPE_CODE_UNDEF
)
5599 completion_list_add_symbol (tracker
, sym
, lookup_name
,
5601 completion_list_add_fields (tracker
, sym
, lookup_name
,
5604 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5605 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5606 completion_list_add_symbol (tracker
, sym
, lookup_name
,
5610 /* Stop when we encounter an enclosing function. Do not stop for
5611 non-inlined functions - the locals of the enclosing function
5612 are in scope for a nested function. */
5613 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5615 b
= BLOCK_SUPERBLOCK (b
);
5618 /* Add fields from the file's types; symbols will be added below. */
5620 if (code
== TYPE_CODE_UNDEF
)
5622 if (surrounding_static_block
!= NULL
)
5623 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5624 completion_list_add_fields (tracker
, sym
, lookup_name
,
5627 if (surrounding_global_block
!= NULL
)
5628 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5629 completion_list_add_fields (tracker
, sym
, lookup_name
,
5633 /* Skip macros if we are completing a struct tag -- arguable but
5634 usually what is expected. */
5635 if (current_language
->la_macro_expansion
== macro_expansion_c
5636 && code
== TYPE_CODE_UNDEF
)
5638 gdb::unique_xmalloc_ptr
<struct macro_scope
> scope
;
5640 /* This adds a macro's name to the current completion list. */
5641 auto add_macro_name
= [&] (const char *macro_name
,
5642 const macro_definition
*,
5643 macro_source_file
*,
5646 completion_list_add_name (tracker
, language_c
, macro_name
,
5647 lookup_name
, sym_text
, word
);
5650 /* Add any macros visible in the default scope. Note that this
5651 may yield the occasional wrong result, because an expression
5652 might be evaluated in a scope other than the default. For
5653 example, if the user types "break file:line if <TAB>", the
5654 resulting expression will be evaluated at "file:line" -- but
5655 at there does not seem to be a way to detect this at
5657 scope
= default_macro_scope ();
5659 macro_for_each_in_scope (scope
->file
, scope
->line
,
5662 /* User-defined macros are always visible. */
5663 macro_for_each (macro_user_macros
, add_macro_name
);
5668 default_collect_symbol_completion_matches (completion_tracker
&tracker
,
5669 complete_symbol_mode mode
,
5670 symbol_name_match_type name_match_type
,
5671 const char *text
, const char *word
,
5672 enum type_code code
)
5674 return default_collect_symbol_completion_matches_break_on (tracker
, mode
,
5680 /* Collect all symbols (regardless of class) which begin by matching
5684 collect_symbol_completion_matches (completion_tracker
&tracker
,
5685 complete_symbol_mode mode
,
5686 symbol_name_match_type name_match_type
,
5687 const char *text
, const char *word
)
5689 current_language
->la_collect_symbol_completion_matches (tracker
, mode
,
5695 /* Like collect_symbol_completion_matches, but only collect
5696 STRUCT_DOMAIN symbols whose type code is CODE. */
5699 collect_symbol_completion_matches_type (completion_tracker
&tracker
,
5700 const char *text
, const char *word
,
5701 enum type_code code
)
5703 complete_symbol_mode mode
= complete_symbol_mode::EXPRESSION
;
5704 symbol_name_match_type name_match_type
= symbol_name_match_type::EXPRESSION
;
5706 gdb_assert (code
== TYPE_CODE_UNION
5707 || code
== TYPE_CODE_STRUCT
5708 || code
== TYPE_CODE_ENUM
);
5709 current_language
->la_collect_symbol_completion_matches (tracker
, mode
,
5714 /* Like collect_symbol_completion_matches, but collects a list of
5715 symbols defined in all source files named SRCFILE. */
5718 collect_file_symbol_completion_matches (completion_tracker
&tracker
,
5719 complete_symbol_mode mode
,
5720 symbol_name_match_type name_match_type
,
5721 const char *text
, const char *word
,
5722 const char *srcfile
)
5724 /* The symbol we are completing on. Points in same buffer as text. */
5725 const char *sym_text
;
5727 /* Now look for the symbol we are supposed to complete on.
5728 FIXME: This should be language-specific. */
5729 if (mode
== complete_symbol_mode::LINESPEC
)
5735 const char *quote_pos
= NULL
;
5737 /* First see if this is a quoted string. */
5739 for (p
= text
; *p
!= '\0'; ++p
)
5741 if (quote_found
!= '\0')
5743 if (*p
== quote_found
)
5744 /* Found close quote. */
5746 else if (*p
== '\\' && p
[1] == quote_found
)
5747 /* A backslash followed by the quote character
5748 doesn't end the string. */
5751 else if (*p
== '\'' || *p
== '"')
5757 if (quote_found
== '\'')
5758 /* A string within single quotes can be a symbol, so complete on it. */
5759 sym_text
= quote_pos
+ 1;
5760 else if (quote_found
== '"')
5761 /* A double-quoted string is never a symbol, nor does it make sense
5762 to complete it any other way. */
5768 /* Not a quoted string. */
5769 sym_text
= language_search_unquoted_string (text
, p
);
5773 lookup_name_info
lookup_name (sym_text
, name_match_type
, true);
5775 /* Go through symtabs for SRCFILE and check the externs and statics
5776 for symbols which match. */
5777 iterate_over_symtabs (srcfile
, [&] (symtab
*s
)
5779 add_symtab_completions (SYMTAB_COMPUNIT (s
),
5780 tracker
, mode
, lookup_name
,
5781 sym_text
, word
, TYPE_CODE_UNDEF
);
5786 /* A helper function for make_source_files_completion_list. It adds
5787 another file name to a list of possible completions, growing the
5788 list as necessary. */
5791 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5792 completion_list
*list
)
5794 list
->emplace_back (make_completion_match_str (fname
, text
, word
));
5798 not_interesting_fname (const char *fname
)
5800 static const char *illegal_aliens
[] = {
5801 "_globals_", /* inserted by coff_symtab_read */
5806 for (i
= 0; illegal_aliens
[i
]; i
++)
5808 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5814 /* An object of this type is passed as the user_data argument to
5815 map_partial_symbol_filenames. */
5816 struct add_partial_filename_data
5818 struct filename_seen_cache
*filename_seen_cache
;
5822 completion_list
*list
;
5825 /* A callback for map_partial_symbol_filenames. */
5828 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5831 struct add_partial_filename_data
*data
5832 = (struct add_partial_filename_data
*) user_data
;
5834 if (not_interesting_fname (filename
))
5836 if (!data
->filename_seen_cache
->seen (filename
)
5837 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5839 /* This file matches for a completion; add it to the
5840 current list of matches. */
5841 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5845 const char *base_name
= lbasename (filename
);
5847 if (base_name
!= filename
5848 && !data
->filename_seen_cache
->seen (base_name
)
5849 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5850 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5854 /* Return a list of all source files whose names begin with matching
5855 TEXT. The file names are looked up in the symbol tables of this
5859 make_source_files_completion_list (const char *text
, const char *word
)
5861 size_t text_len
= strlen (text
);
5862 completion_list list
;
5863 const char *base_name
;
5864 struct add_partial_filename_data datum
;
5866 if (!have_full_symbols () && !have_partial_symbols ())
5869 filename_seen_cache filenames_seen
;
5871 for (objfile
*objfile
: current_program_space
->objfiles ())
5873 for (compunit_symtab
*cu
: objfile
->compunits ())
5875 for (symtab
*s
: compunit_filetabs (cu
))
5877 if (not_interesting_fname (s
->filename
))
5879 if (!filenames_seen
.seen (s
->filename
)
5880 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5882 /* This file matches for a completion; add it to the current
5884 add_filename_to_list (s
->filename
, text
, word
, &list
);
5888 /* NOTE: We allow the user to type a base name when the
5889 debug info records leading directories, but not the other
5890 way around. This is what subroutines of breakpoint
5891 command do when they parse file names. */
5892 base_name
= lbasename (s
->filename
);
5893 if (base_name
!= s
->filename
5894 && !filenames_seen
.seen (base_name
)
5895 && filename_ncmp (base_name
, text
, text_len
) == 0)
5896 add_filename_to_list (base_name
, text
, word
, &list
);
5902 datum
.filename_seen_cache
= &filenames_seen
;
5905 datum
.text_len
= text_len
;
5907 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5908 0 /*need_fullname*/);
5915 /* Return the "main_info" object for the current program space. If
5916 the object has not yet been created, create it and fill in some
5919 static struct main_info
*
5920 get_main_info (void)
5922 struct main_info
*info
= main_progspace_key
.get (current_program_space
);
5926 /* It may seem strange to store the main name in the progspace
5927 and also in whatever objfile happens to see a main name in
5928 its debug info. The reason for this is mainly historical:
5929 gdb returned "main" as the name even if no function named
5930 "main" was defined the program; and this approach lets us
5931 keep compatibility. */
5932 info
= main_progspace_key
.emplace (current_program_space
);
5939 set_main_name (const char *name
, enum language lang
)
5941 struct main_info
*info
= get_main_info ();
5943 if (info
->name_of_main
!= NULL
)
5945 xfree (info
->name_of_main
);
5946 info
->name_of_main
= NULL
;
5947 info
->language_of_main
= language_unknown
;
5951 info
->name_of_main
= xstrdup (name
);
5952 info
->language_of_main
= lang
;
5956 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5960 find_main_name (void)
5962 const char *new_main_name
;
5964 /* First check the objfiles to see whether a debuginfo reader has
5965 picked up the appropriate main name. Historically the main name
5966 was found in a more or less random way; this approach instead
5967 relies on the order of objfile creation -- which still isn't
5968 guaranteed to get the correct answer, but is just probably more
5970 for (objfile
*objfile
: current_program_space
->objfiles ())
5972 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5974 set_main_name (objfile
->per_bfd
->name_of_main
,
5975 objfile
->per_bfd
->language_of_main
);
5980 /* Try to see if the main procedure is in Ada. */
5981 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5982 be to add a new method in the language vector, and call this
5983 method for each language until one of them returns a non-empty
5984 name. This would allow us to remove this hard-coded call to
5985 an Ada function. It is not clear that this is a better approach
5986 at this point, because all methods need to be written in a way
5987 such that false positives never be returned. For instance, it is
5988 important that a method does not return a wrong name for the main
5989 procedure if the main procedure is actually written in a different
5990 language. It is easy to guaranty this with Ada, since we use a
5991 special symbol generated only when the main in Ada to find the name
5992 of the main procedure. It is difficult however to see how this can
5993 be guarantied for languages such as C, for instance. This suggests
5994 that order of call for these methods becomes important, which means
5995 a more complicated approach. */
5996 new_main_name
= ada_main_name ();
5997 if (new_main_name
!= NULL
)
5999 set_main_name (new_main_name
, language_ada
);
6003 new_main_name
= d_main_name ();
6004 if (new_main_name
!= NULL
)
6006 set_main_name (new_main_name
, language_d
);
6010 new_main_name
= go_main_name ();
6011 if (new_main_name
!= NULL
)
6013 set_main_name (new_main_name
, language_go
);
6017 new_main_name
= pascal_main_name ();
6018 if (new_main_name
!= NULL
)
6020 set_main_name (new_main_name
, language_pascal
);
6024 /* The languages above didn't identify the name of the main procedure.
6025 Fallback to "main". */
6026 set_main_name ("main", language_unknown
);
6034 struct main_info
*info
= get_main_info ();
6036 if (info
->name_of_main
== NULL
)
6039 return info
->name_of_main
;
6042 /* Return the language of the main function. If it is not known,
6043 return language_unknown. */
6046 main_language (void)
6048 struct main_info
*info
= get_main_info ();
6050 if (info
->name_of_main
== NULL
)
6053 return info
->language_of_main
;
6056 /* Handle ``executable_changed'' events for the symtab module. */
6059 symtab_observer_executable_changed (void)
6061 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
6062 set_main_name (NULL
, language_unknown
);
6065 /* Return 1 if the supplied producer string matches the ARM RealView
6066 compiler (armcc). */
6069 producer_is_realview (const char *producer
)
6071 static const char *const arm_idents
[] = {
6072 "ARM C Compiler, ADS",
6073 "Thumb C Compiler, ADS",
6074 "ARM C++ Compiler, ADS",
6075 "Thumb C++ Compiler, ADS",
6076 "ARM/Thumb C/C++ Compiler, RVCT",
6077 "ARM C/C++ Compiler, RVCT"
6081 if (producer
== NULL
)
6084 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
6085 if (startswith (producer
, arm_idents
[i
]))
6093 /* The next index to hand out in response to a registration request. */
6095 static int next_aclass_value
= LOC_FINAL_VALUE
;
6097 /* The maximum number of "aclass" registrations we support. This is
6098 constant for convenience. */
6099 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
6101 /* The objects representing the various "aclass" values. The elements
6102 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
6103 elements are those registered at gdb initialization time. */
6105 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
6107 /* The globally visible pointer. This is separate from 'symbol_impl'
6108 so that it can be const. */
6110 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
6112 /* Make sure we saved enough room in struct symbol. */
6114 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
6116 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
6117 is the ops vector associated with this index. This returns the new
6118 index, which should be used as the aclass_index field for symbols
6122 register_symbol_computed_impl (enum address_class aclass
,
6123 const struct symbol_computed_ops
*ops
)
6125 int result
= next_aclass_value
++;
6127 gdb_assert (aclass
== LOC_COMPUTED
);
6128 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6129 symbol_impl
[result
].aclass
= aclass
;
6130 symbol_impl
[result
].ops_computed
= ops
;
6132 /* Sanity check OPS. */
6133 gdb_assert (ops
!= NULL
);
6134 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
6135 gdb_assert (ops
->describe_location
!= NULL
);
6136 gdb_assert (ops
->get_symbol_read_needs
!= NULL
);
6137 gdb_assert (ops
->read_variable
!= NULL
);
6142 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
6143 OPS is the ops vector associated with this index. This returns the
6144 new index, which should be used as the aclass_index field for symbols
6148 register_symbol_block_impl (enum address_class aclass
,
6149 const struct symbol_block_ops
*ops
)
6151 int result
= next_aclass_value
++;
6153 gdb_assert (aclass
== LOC_BLOCK
);
6154 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6155 symbol_impl
[result
].aclass
= aclass
;
6156 symbol_impl
[result
].ops_block
= ops
;
6158 /* Sanity check OPS. */
6159 gdb_assert (ops
!= NULL
);
6160 gdb_assert (ops
->find_frame_base_location
!= NULL
);
6165 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
6166 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
6167 this index. This returns the new index, which should be used as
6168 the aclass_index field for symbols of this type. */
6171 register_symbol_register_impl (enum address_class aclass
,
6172 const struct symbol_register_ops
*ops
)
6174 int result
= next_aclass_value
++;
6176 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
6177 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6178 symbol_impl
[result
].aclass
= aclass
;
6179 symbol_impl
[result
].ops_register
= ops
;
6184 /* Initialize elements of 'symbol_impl' for the constants in enum
6188 initialize_ordinary_address_classes (void)
6192 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
6193 symbol_impl
[i
].aclass
= (enum address_class
) i
;
6198 /* Helper function to initialize the fields of an objfile-owned symbol.
6199 It assumed that *SYM is already all zeroes. */
6202 initialize_objfile_symbol_1 (struct symbol
*sym
)
6204 SYMBOL_OBJFILE_OWNED (sym
) = 1;
6205 SYMBOL_SECTION (sym
) = -1;
6208 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
6211 initialize_objfile_symbol (struct symbol
*sym
)
6213 memset (sym
, 0, sizeof (*sym
));
6214 initialize_objfile_symbol_1 (sym
);
6217 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
6221 allocate_symbol (struct objfile
*objfile
)
6223 struct symbol
*result
;
6225 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6226 initialize_objfile_symbol_1 (result
);
6231 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
6234 struct template_symbol
*
6235 allocate_template_symbol (struct objfile
*objfile
)
6237 struct template_symbol
*result
;
6239 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
6240 initialize_objfile_symbol_1 (result
);
6248 symbol_objfile (const struct symbol
*symbol
)
6250 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6251 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6257 symbol_arch (const struct symbol
*symbol
)
6259 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6260 return symbol
->owner
.arch
;
6261 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6267 symbol_symtab (const struct symbol
*symbol
)
6269 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6270 return symbol
->owner
.symtab
;
6276 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6278 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6279 symbol
->owner
.symtab
= symtab
;
6285 get_symbol_address (const struct symbol
*sym
)
6287 gdb_assert (sym
->maybe_copied
);
6288 gdb_assert (SYMBOL_CLASS (sym
) == LOC_STATIC
);
6290 const char *linkage_name
= SYMBOL_LINKAGE_NAME (sym
);
6292 for (objfile
*objfile
: current_program_space
->objfiles ())
6294 bound_minimal_symbol minsym
6295 = lookup_minimal_symbol_linkage (linkage_name
, objfile
);
6296 if (minsym
.minsym
!= nullptr)
6297 return BMSYMBOL_VALUE_ADDRESS (minsym
);
6299 return sym
->ginfo
.value
.address
;
6305 get_msymbol_address (struct objfile
*objf
, const struct minimal_symbol
*minsym
)
6307 gdb_assert (minsym
->maybe_copied
);
6308 gdb_assert ((objf
->flags
& OBJF_MAINLINE
) == 0);
6310 const char *linkage_name
= MSYMBOL_LINKAGE_NAME (minsym
);
6312 for (objfile
*objfile
: current_program_space
->objfiles ())
6314 if ((objfile
->flags
& OBJF_MAINLINE
) != 0)
6316 bound_minimal_symbol found
6317 = lookup_minimal_symbol_linkage (linkage_name
, objfile
);
6318 if (found
.minsym
!= nullptr)
6319 return BMSYMBOL_VALUE_ADDRESS (found
);
6322 return (minsym
->value
.address
6323 + ANOFFSET (objf
->section_offsets
, minsym
->section
));
6329 _initialize_symtab (void)
6331 cmd_list_element
*c
;
6333 initialize_ordinary_address_classes ();
6335 c
= add_info ("variables", info_variables_command
,
6336 info_print_args_help (_("\
6337 All global and static variable names or those matching REGEXPs.\n\
6338 Usage: info variables [-q] [-n] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6339 Prints the global and static variables.\n"),
6340 _("global and static variables"),
6342 set_cmd_completer_handle_brkchars (c
, info_print_command_completer
);
6345 c
= add_com ("whereis", class_info
, info_variables_command
,
6346 info_print_args_help (_("\
6347 All global and static variable names, or those matching REGEXPs.\n\
6348 Usage: whereis [-q] [-n] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6349 Prints the global and static variables.\n"),
6350 _("global and static variables"),
6352 set_cmd_completer_handle_brkchars (c
, info_print_command_completer
);
6355 c
= add_info ("functions", info_functions_command
,
6356 info_print_args_help (_("\
6357 All function names or those matching REGEXPs.\n\
6358 Usage: info functions [-q] [-n] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6359 Prints the functions.\n"),
6362 set_cmd_completer_handle_brkchars (c
, info_print_command_completer
);
6364 c
= add_info ("types", info_types_command
, _("\
6365 All type names, or those matching REGEXP.\n\
6366 Usage: info types [-q] [REGEXP]\n\
6367 Print information about all types matching REGEXP, or all types if no\n\
6368 REGEXP is given. The optional flag -q disables printing of headers."));
6369 set_cmd_completer_handle_brkchars (c
, info_types_command_completer
);
6371 const auto info_sources_opts
= make_info_sources_options_def_group (nullptr);
6373 static std::string info_sources_help
6374 = gdb::option::build_help (_("\
6375 All source files in the program or those matching REGEXP.\n\
6376 Usage: info sources [OPTION]... [REGEXP]\n\
6377 By default, REGEXP is used to match anywhere in the filename.\n\
6383 c
= add_info ("sources", info_sources_command
, info_sources_help
.c_str ());
6384 set_cmd_completer_handle_brkchars (c
, info_sources_command_completer
);
6386 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6387 _("Set a breakpoint for all functions matching REGEXP."));
6389 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6390 multiple_symbols_modes
, &multiple_symbols_mode
,
6392 Set how the debugger handles ambiguities in expressions."), _("\
6393 Show how the debugger handles ambiguities in expressions."), _("\
6394 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6395 NULL
, NULL
, &setlist
, &showlist
);
6397 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6398 &basenames_may_differ
, _("\
6399 Set whether a source file may have multiple base names."), _("\
6400 Show whether a source file may have multiple base names."), _("\
6401 (A \"base name\" is the name of a file with the directory part removed.\n\
6402 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6403 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6404 before comparing them. Canonicalization is an expensive operation,\n\
6405 but it allows the same file be known by more than one base name.\n\
6406 If not set (the default), all source files are assumed to have just\n\
6407 one base name, and gdb will do file name comparisons more efficiently."),
6409 &setlist
, &showlist
);
6411 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6412 _("Set debugging of symbol table creation."),
6413 _("Show debugging of symbol table creation."), _("\
6414 When enabled (non-zero), debugging messages are printed when building\n\
6415 symbol tables. A value of 1 (one) normally provides enough information.\n\
6416 A value greater than 1 provides more verbose information."),
6419 &setdebuglist
, &showdebuglist
);
6421 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6423 Set debugging of symbol lookup."), _("\
6424 Show debugging of symbol lookup."), _("\
6425 When enabled (non-zero), symbol lookups are logged."),
6427 &setdebuglist
, &showdebuglist
);
6429 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6430 &new_symbol_cache_size
,
6431 _("Set the size of the symbol cache."),
6432 _("Show the size of the symbol cache."), _("\
6433 The size of the symbol cache.\n\
6434 If zero then the symbol cache is disabled."),
6435 set_symbol_cache_size_handler
, NULL
,
6436 &maintenance_set_cmdlist
,
6437 &maintenance_show_cmdlist
);
6439 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6440 _("Dump the symbol cache for each program space."),
6441 &maintenanceprintlist
);
6443 add_cmd ("symbol-cache-statistics", class_maintenance
,
6444 maintenance_print_symbol_cache_statistics
,
6445 _("Print symbol cache statistics for each program space."),
6446 &maintenanceprintlist
);
6448 add_cmd ("flush-symbol-cache", class_maintenance
,
6449 maintenance_flush_symbol_cache
,
6450 _("Flush the symbol cache for each program space."),
6453 gdb::observers::executable_changed
.attach (symtab_observer_executable_changed
);
6454 gdb::observers::new_objfile
.attach (symtab_new_objfile_observer
);
6455 gdb::observers::free_objfile
.attach (symtab_free_objfile_observer
);