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/pathstuff.h"
73 /* Forward declarations for local functions. */
75 static void rbreak_command (const char *, int);
77 static int find_line_common (struct linetable *, int, int *, int);
79 static struct block_symbol
80 lookup_symbol_aux (const char *name,
81 symbol_name_match_type match_type,
82 const struct block *block,
83 const domain_enum domain,
84 enum language language,
85 struct field_of_this_result *);
88 struct block_symbol lookup_local_symbol (const char *name,
89 symbol_name_match_type match_type,
90 const struct block *block,
91 const domain_enum domain,
92 enum language language);
94 static struct block_symbol
95 lookup_symbol_in_objfile (struct objfile *objfile,
96 enum block_enum block_index,
97 const char *name, const domain_enum domain);
99 /* Type of the data stored on the program space. */
103 main_info () = default;
107 xfree (name_of_main);
110 /* Name of "main". */
112 char *name_of_main = nullptr;
114 /* Language of "main". */
116 enum language language_of_main = language_unknown;
119 /* Program space key for finding name and language of "main". */
121 static const program_space_key<main_info> main_progspace_key;
123 /* The default symbol cache size.
124 There is no extra cpu cost for large N (except when flushing the cache,
125 which is rare). The value here is just a first attempt. A better default
126 value may be higher or lower. A prime number can make up for a bad hash
127 computation, so that's why the number is what it is. */
128 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
130 /* The maximum symbol cache size.
131 There's no method to the decision of what value to use here, other than
132 there's no point in allowing a user typo to make gdb consume all memory. */
133 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
135 /* symbol_cache_lookup returns this if a previous lookup failed to find the
136 symbol in any objfile. */
137 #define SYMBOL_LOOKUP_FAILED \
138 ((struct block_symbol) {(struct symbol *) 1, NULL})
139 #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)
141 /* Recording lookups that don't find the symbol is just as important, if not
142 more so, than recording found symbols. */
144 enum symbol_cache_slot_state
147 SYMBOL_SLOT_NOT_FOUND,
151 struct symbol_cache_slot
153 enum symbol_cache_slot_state state;
155 /* The objfile that was current when the symbol was looked up.
156 This is only needed for global blocks, but for simplicity's sake
157 we allocate the space for both. If data shows the extra space used
158 for static blocks is a problem, we can split things up then.
160 Global blocks need cache lookup to include the objfile context because
161 we need to account for gdbarch_iterate_over_objfiles_in_search_order
162 which can traverse objfiles in, effectively, any order, depending on
163 the current objfile, thus affecting which symbol is found. Normally,
164 only the current objfile is searched first, and then the rest are
165 searched in recorded order; but putting cache lookup inside
166 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
167 Instead we just make the current objfile part of the context of
168 cache lookup. This means we can record the same symbol multiple times,
169 each with a different "current objfile" that was in effect when the
170 lookup was saved in the cache, but cache space is pretty cheap. */
171 const struct objfile *objfile_context;
175 struct block_symbol found;
184 /* Symbols don't specify global vs static block.
185 So keep them in separate caches. */
187 struct block_symbol_cache
191 unsigned int collisions;
193 /* SYMBOLS is a variable length array of this size.
194 One can imagine that in general one cache (global/static) should be a
195 fraction of the size of the other, but there's no data at the moment
196 on which to decide. */
199 struct symbol_cache_slot symbols[1];
204 Searching for symbols in the static and global blocks over multiple objfiles
205 again and again can be slow, as can searching very big objfiles. This is a
206 simple cache to improve symbol lookup performance, which is critical to
207 overall gdb performance.
209 Symbols are hashed on the name, its domain, and block.
210 They are also hashed on their objfile for objfile-specific lookups. */
214 symbol_cache () = default;
218 xfree (global_symbols);
219 xfree (static_symbols);
222 struct block_symbol_cache *global_symbols = nullptr;
223 struct block_symbol_cache *static_symbols = nullptr;
226 /* Program space key for finding its symbol cache. */
228 static const program_space_key<symbol_cache> symbol_cache_key;
230 /* When non-zero, print debugging messages related to symtab creation. */
231 unsigned int symtab_create_debug = 0;
233 /* When non-zero, print debugging messages related to symbol lookup. */
234 unsigned int symbol_lookup_debug = 0;
236 /* The size of the cache is staged here. */
237 static unsigned int new_symbol_cache_size = DEFAULT_SYMBOL_CACHE_SIZE;
239 /* The current value of the symbol cache size.
240 This is saved so that if the user enters a value too big we can restore
241 the original value from here. */
242 static unsigned int symbol_cache_size = DEFAULT_SYMBOL_CACHE_SIZE;
244 /* Non-zero if a file may be known by two different basenames.
245 This is the uncommon case, and significantly slows down gdb.
246 Default set to "off" to not slow down the common case. */
247 int basenames_may_differ = 0;
249 /* Allow the user to configure the debugger behavior with respect
250 to multiple-choice menus when more than one symbol matches during
253 const char multiple_symbols_ask[] = "ask";
254 const char multiple_symbols_all[] = "all";
255 const char multiple_symbols_cancel[] = "cancel";
256 static const char *const multiple_symbols_modes[] =
258 multiple_symbols_ask,
259 multiple_symbols_all,
260 multiple_symbols_cancel,
263 static const char *multiple_symbols_mode = multiple_symbols_all;
265 /* Read-only accessor to AUTO_SELECT_MODE. */
268 multiple_symbols_select_mode (void)
270 return multiple_symbols_mode;
273 /* Return the name of a domain_enum. */
276 domain_name (domain_enum e)
280 case UNDEF_DOMAIN: return "UNDEF_DOMAIN";
281 case VAR_DOMAIN: return "VAR_DOMAIN";
282 case STRUCT_DOMAIN: return "STRUCT_DOMAIN";
283 case MODULE_DOMAIN: return "MODULE_DOMAIN";
284 case LABEL_DOMAIN: return "LABEL_DOMAIN";
285 case COMMON_BLOCK_DOMAIN: return "COMMON_BLOCK_DOMAIN";
286 default: gdb_assert_not_reached ("bad domain_enum");
290 /* Return the name of a search_domain . */
293 search_domain_name (enum search_domain e)
297 case VARIABLES_DOMAIN: return "VARIABLES_DOMAIN";
298 case FUNCTIONS_DOMAIN: return "FUNCTIONS_DOMAIN";
299 case TYPES_DOMAIN: return "TYPES_DOMAIN";
300 case ALL_DOMAIN: return "ALL_DOMAIN";
301 default: gdb_assert_not_reached ("bad search_domain");
308 compunit_primary_filetab (const struct compunit_symtab *cust)
310 gdb_assert (COMPUNIT_FILETABS (cust) != NULL);
312 /* The primary file symtab is the first one in the list. */
313 return COMPUNIT_FILETABS (cust);
319 compunit_language (const struct compunit_symtab *cust)
321 struct symtab *symtab = compunit_primary_filetab (cust);
323 /* The language of the compunit symtab is the language of its primary
325 return SYMTAB_LANGUAGE (symtab);
331 minimal_symbol::data_p () const
333 return type == mst_data
336 || type == mst_file_data
337 || type == mst_file_bss;
343 minimal_symbol::text_p () const
345 return type == mst_text
346 || type == mst_text_gnu_ifunc
347 || type == mst_data_gnu_ifunc
348 || type == mst_slot_got_plt
349 || type == mst_solib_trampoline
350 || type == mst_file_text;
353 /* See whether FILENAME matches SEARCH_NAME using the rule that we
354 advertise to the user. (The manual's description of linespecs
355 describes what we advertise). Returns true if they match, false
359 compare_filenames_for_search (const char *filename, const char *search_name)
361 int len = strlen (filename);
362 size_t search_len = strlen (search_name);
364 if (len < search_len)
367 /* The tail of FILENAME must match. */
368 if (FILENAME_CMP (filename + len - search_len, search_name) != 0)
371 /* Either the names must completely match, or the character
372 preceding the trailing SEARCH_NAME segment of FILENAME must be a
375 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
376 cannot match FILENAME "/path//dir/file.c" - as user has requested
377 absolute path. The sama applies for "c:\file.c" possibly
378 incorrectly hypothetically matching "d:\dir\c:\file.c".
380 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
381 compatible with SEARCH_NAME "file.c". In such case a compiler had
382 to put the "c:file.c" name into debug info. Such compatibility
383 works only on GDB built for DOS host. */
384 return (len == search_len
385 || (!IS_ABSOLUTE_PATH (search_name)
386 && IS_DIR_SEPARATOR (filename[len - search_len - 1]))
387 || (HAS_DRIVE_SPEC (filename)
388 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
391 /* Same as compare_filenames_for_search, but for glob-style patterns.
392 Heads up on the order of the arguments. They match the order of
393 compare_filenames_for_search, but it's the opposite of the order of
394 arguments to gdb_filename_fnmatch. */
397 compare_glob_filenames_for_search (const char *filename,
398 const char *search_name)
400 /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
401 all /s have to be explicitly specified. */
402 int file_path_elements = count_path_elements (filename);
403 int search_path_elements = count_path_elements (search_name);
405 if (search_path_elements > file_path_elements)
408 if (IS_ABSOLUTE_PATH (search_name))
410 return (search_path_elements == file_path_elements
411 && gdb_filename_fnmatch (search_name, filename,
412 FNM_FILE_NAME | FNM_NOESCAPE) == 0);
416 const char *file_to_compare
417 = strip_leading_path_elements (filename,
418 file_path_elements - search_path_elements);
420 return gdb_filename_fnmatch (search_name, file_to_compare,
421 FNM_FILE_NAME | FNM_NOESCAPE) == 0;
425 /* Check for a symtab of a specific name by searching some symtabs.
426 This is a helper function for callbacks of iterate_over_symtabs.
428 If NAME is not absolute, then REAL_PATH is NULL
429 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
431 The return value, NAME, REAL_PATH and CALLBACK are identical to the
432 `map_symtabs_matching_filename' method of quick_symbol_functions.
434 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
435 Each symtab within the specified compunit symtab is also searched.
436 AFTER_LAST is one past the last compunit symtab to search; NULL means to
437 search until the end of the list. */
440 iterate_over_some_symtabs (const char *name,
441 const char *real_path,
442 struct compunit_symtab *first,
443 struct compunit_symtab *after_last,
444 gdb::function_view<bool (symtab *)> callback)
446 struct compunit_symtab *cust;
447 const char* base_name = lbasename (name);
449 for (cust = first; cust != NULL && cust != after_last; cust = cust->next)
451 for (symtab *s : compunit_filetabs (cust))
453 if (compare_filenames_for_search (s->filename, name))
460 /* Before we invoke realpath, which can get expensive when many
461 files are involved, do a quick comparison of the basenames. */
462 if (! basenames_may_differ
463 && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
466 if (compare_filenames_for_search (symtab_to_fullname (s), name))
473 /* If the user gave us an absolute path, try to find the file in
474 this symtab and use its absolute path. */
475 if (real_path != NULL)
477 const char *fullname = symtab_to_fullname (s);
479 gdb_assert (IS_ABSOLUTE_PATH (real_path));
480 gdb_assert (IS_ABSOLUTE_PATH (name));
481 if (FILENAME_CMP (real_path, fullname) == 0)
494 /* Check for a symtab of a specific name; first in symtabs, then in
495 psymtabs. *If* there is no '/' in the name, a match after a '/'
496 in the symtab filename will also work.
498 Calls CALLBACK with each symtab that is found. If CALLBACK returns
499 true, the search stops. */
502 iterate_over_symtabs (const char *name,
503 gdb::function_view<bool (symtab *)> callback)
505 gdb::unique_xmalloc_ptr<char> real_path;
507 /* Here we are interested in canonicalizing an absolute path, not
508 absolutizing a relative path. */
509 if (IS_ABSOLUTE_PATH (name))
511 real_path = gdb_realpath (name);
512 gdb_assert (IS_ABSOLUTE_PATH (real_path.get ()));
515 for (objfile *objfile : current_program_space->objfiles ())
517 if (iterate_over_some_symtabs (name, real_path.get (),
518 objfile->compunit_symtabs, NULL,
523 /* Same search rules as above apply here, but now we look thru the
526 for (objfile *objfile : current_program_space->objfiles ())
529 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
537 /* A wrapper for iterate_over_symtabs that returns the first matching
541 lookup_symtab (const char *name)
543 struct symtab *result = NULL;
545 iterate_over_symtabs (name, [&] (symtab *symtab)
555 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
556 full method name, which consist of the class name (from T), the unadorned
557 method name from METHOD_ID, and the signature for the specific overload,
558 specified by SIGNATURE_ID. Note that this function is g++ specific. */
561 gdb_mangle_name (struct type *type, int method_id, int signature_id)
563 int mangled_name_len;
565 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
566 struct fn_field *method = &f[signature_id];
567 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
568 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
569 const char *newname = TYPE_NAME (type);
571 /* Does the form of physname indicate that it is the full mangled name
572 of a constructor (not just the args)? */
573 int is_full_physname_constructor;
576 int is_destructor = is_destructor_name (physname);
577 /* Need a new type prefix. */
578 const char *const_prefix = method->is_const ? "C" : "";
579 const char *volatile_prefix = method->is_volatile ? "V" : "";
581 int len = (newname == NULL ? 0 : strlen (newname));
583 /* Nothing to do if physname already contains a fully mangled v3 abi name
584 or an operator name. */
585 if ((physname[0] == '_' && physname[1] == 'Z')
586 || is_operator_name (field_name))
587 return xstrdup (physname);
589 is_full_physname_constructor = is_constructor_name (physname);
591 is_constructor = is_full_physname_constructor
592 || (newname && strcmp (field_name, newname) == 0);
595 is_destructor = (startswith (physname, "__dt"));
597 if (is_destructor || is_full_physname_constructor)
599 mangled_name = (char *) xmalloc (strlen (physname) + 1);
600 strcpy (mangled_name, physname);
606 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
608 else if (physname[0] == 't' || physname[0] == 'Q')
610 /* The physname for template and qualified methods already includes
612 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
618 xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix,
619 volatile_prefix, len);
621 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
622 + strlen (buf) + len + strlen (physname) + 1);
624 mangled_name = (char *) xmalloc (mangled_name_len);
626 mangled_name[0] = '\0';
628 strcpy (mangled_name, field_name);
630 strcat (mangled_name, buf);
631 /* If the class doesn't have a name, i.e. newname NULL, then we just
632 mangle it using 0 for the length of the class. Thus it gets mangled
633 as something starting with `::' rather than `classname::'. */
635 strcat (mangled_name, newname);
637 strcat (mangled_name, physname);
638 return (mangled_name);
641 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
642 correctly allocated. */
645 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
647 struct obstack *obstack)
649 if (gsymbol->language == language_ada)
653 gsymbol->ada_mangled = 0;
654 gsymbol->language_specific.obstack = obstack;
658 gsymbol->ada_mangled = 1;
659 gsymbol->language_specific.demangled_name = name;
663 gsymbol->language_specific.demangled_name = name;
666 /* Return the demangled name of GSYMBOL. */
669 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
671 if (gsymbol->language == language_ada)
673 if (!gsymbol->ada_mangled)
678 return gsymbol->language_specific.demangled_name;
682 /* Initialize the language dependent portion of a symbol
683 depending upon the language for the symbol. */
686 symbol_set_language (struct general_symbol_info *gsymbol,
687 enum language language,
688 struct obstack *obstack)
690 gsymbol->language = language;
691 if (gsymbol->language == language_cplus
692 || gsymbol->language == language_d
693 || gsymbol->language == language_go
694 || gsymbol->language == language_objc
695 || gsymbol->language == language_fortran)
697 symbol_set_demangled_name (gsymbol, NULL, obstack);
699 else if (gsymbol->language == language_ada)
701 gdb_assert (gsymbol->ada_mangled == 0);
702 gsymbol->language_specific.obstack = obstack;
706 memset (&gsymbol->language_specific, 0,
707 sizeof (gsymbol->language_specific));
711 /* Functions to initialize a symbol's mangled name. */
713 /* Objects of this type are stored in the demangled name hash table. */
714 struct demangled_name_entry
717 ENUM_BITFIELD(language) language : LANGUAGE_BITS;
721 /* Hash function for the demangled name hash. */
724 hash_demangled_name_entry (const void *data)
726 const struct demangled_name_entry *e
727 = (const struct demangled_name_entry *) data;
729 return htab_hash_string (e->mangled);
732 /* Equality function for the demangled name hash. */
735 eq_demangled_name_entry (const void *a, const void *b)
737 const struct demangled_name_entry *da
738 = (const struct demangled_name_entry *) a;
739 const struct demangled_name_entry *db
740 = (const struct demangled_name_entry *) b;
742 return strcmp (da->mangled, db->mangled) == 0;
745 /* Create the hash table used for demangled names. Each hash entry is
746 a pair of strings; one for the mangled name and one for the demangled
747 name. The entry is hashed via just the mangled name. */
750 create_demangled_names_hash (struct objfile_per_bfd_storage *per_bfd)
752 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
753 The hash table code will round this up to the next prime number.
754 Choosing a much larger table size wastes memory, and saves only about
755 1% in symbol reading. */
757 per_bfd->demangled_names_hash.reset (htab_create_alloc
758 (256, hash_demangled_name_entry, eq_demangled_name_entry,
759 NULL, xcalloc, xfree));
762 /* Try to determine the demangled name for a symbol, based on the
763 language of that symbol. If the language is set to language_auto,
764 it will attempt to find any demangling algorithm that works and
765 then set the language appropriately. The returned name is allocated
766 by the demangler and should be xfree'd. */
769 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
772 char *demangled = NULL;
775 if (gsymbol->language == language_unknown)
776 gsymbol->language = language_auto;
778 if (gsymbol->language != language_auto)
780 const struct language_defn *lang = language_def (gsymbol->language);
782 language_sniff_from_mangled_name (lang, mangled, &demangled);
786 for (i = language_unknown; i < nr_languages; ++i)
788 enum language l = (enum language) i;
789 const struct language_defn *lang = language_def (l);
791 if (language_sniff_from_mangled_name (lang, mangled, &demangled))
793 gsymbol->language = l;
801 /* Set both the mangled and demangled (if any) names for GSYMBOL based
802 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
803 objfile's obstack; but if COPY_NAME is 0 and if NAME is
804 NUL-terminated, then this function assumes that NAME is already
805 correctly saved (either permanently or with a lifetime tied to the
806 objfile), and it will not be copied.
808 The hash table corresponding to OBJFILE is used, and the memory
809 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
810 so the pointer can be discarded after calling this function. */
813 symbol_set_names (struct general_symbol_info *gsymbol,
814 const char *linkage_name, int len, int copy_name,
815 struct objfile_per_bfd_storage *per_bfd)
817 struct demangled_name_entry **slot;
818 /* A 0-terminated copy of the linkage name. */
819 const char *linkage_name_copy;
820 struct demangled_name_entry entry;
822 if (gsymbol->language == language_ada)
824 /* In Ada, we do the symbol lookups using the mangled name, so
825 we can save some space by not storing the demangled name. */
827 gsymbol->name = linkage_name;
830 char *name = (char *) obstack_alloc (&per_bfd->storage_obstack,
833 memcpy (name, linkage_name, len);
835 gsymbol->name = name;
837 symbol_set_demangled_name (gsymbol, NULL, &per_bfd->storage_obstack);
842 if (per_bfd->demangled_names_hash == NULL)
843 create_demangled_names_hash (per_bfd);
845 if (linkage_name[len] != '\0')
849 alloc_name = (char *) alloca (len + 1);
850 memcpy (alloc_name, linkage_name, len);
851 alloc_name[len] = '\0';
853 linkage_name_copy = alloc_name;
856 linkage_name_copy = linkage_name;
858 entry.mangled = linkage_name_copy;
859 slot = ((struct demangled_name_entry **)
860 htab_find_slot (per_bfd->demangled_names_hash.get (),
863 /* If this name is not in the hash table, add it. */
865 /* A C version of the symbol may have already snuck into the table.
866 This happens to, e.g., main.init (__go_init_main). Cope. */
867 || (gsymbol->language == language_go
868 && (*slot)->demangled[0] == '\0'))
870 char *demangled_name_ptr
871 = symbol_find_demangled_name (gsymbol, linkage_name_copy);
872 gdb::unique_xmalloc_ptr<char> demangled_name (demangled_name_ptr);
873 int demangled_len = demangled_name ? strlen (demangled_name.get ()) : 0;
875 /* Suppose we have demangled_name==NULL, copy_name==0, and
876 linkage_name_copy==linkage_name. In this case, we already have the
877 mangled name saved, and we don't have a demangled name. So,
878 you might think we could save a little space by not recording
879 this in the hash table at all.
881 It turns out that it is actually important to still save such
882 an entry in the hash table, because storing this name gives
883 us better bcache hit rates for partial symbols. */
884 if (!copy_name && linkage_name_copy == linkage_name)
887 = ((struct demangled_name_entry *)
888 obstack_alloc (&per_bfd->storage_obstack,
889 offsetof (struct demangled_name_entry, demangled)
890 + demangled_len + 1));
891 (*slot)->mangled = linkage_name;
897 /* If we must copy the mangled name, put it directly after
898 the demangled name so we can have a single
901 = ((struct demangled_name_entry *)
902 obstack_alloc (&per_bfd->storage_obstack,
903 offsetof (struct demangled_name_entry, demangled)
904 + len + demangled_len + 2));
905 mangled_ptr = &((*slot)->demangled[demangled_len + 1]);
906 strcpy (mangled_ptr, linkage_name_copy);
907 (*slot)->mangled = mangled_ptr;
909 (*slot)->language = gsymbol->language;
911 if (demangled_name != NULL)
912 strcpy ((*slot)->demangled, demangled_name.get ());
914 (*slot)->demangled[0] = '\0';
916 else if (gsymbol->language == language_unknown
917 || gsymbol->language == language_auto)
918 gsymbol->language = (*slot)->language;
920 gsymbol->name = (*slot)->mangled;
921 if ((*slot)->demangled[0] != '\0')
922 symbol_set_demangled_name (gsymbol, (*slot)->demangled,
923 &per_bfd->storage_obstack);
925 symbol_set_demangled_name (gsymbol, NULL, &per_bfd->storage_obstack);
928 /* Return the source code name of a symbol. In languages where
929 demangling is necessary, this is the demangled name. */
932 symbol_natural_name (const struct general_symbol_info *gsymbol)
934 switch (gsymbol->language)
940 case language_fortran:
941 if (symbol_get_demangled_name (gsymbol) != NULL)
942 return symbol_get_demangled_name (gsymbol);
945 return ada_decode_symbol (gsymbol);
949 return gsymbol->name;
952 /* Return the demangled name for a symbol based on the language for
953 that symbol. If no demangled name exists, return NULL. */
956 symbol_demangled_name (const struct general_symbol_info *gsymbol)
958 const char *dem_name = NULL;
960 switch (gsymbol->language)
966 case language_fortran:
967 dem_name = symbol_get_demangled_name (gsymbol);
970 dem_name = ada_decode_symbol (gsymbol);
978 /* Return the search name of a symbol---generally the demangled or
979 linkage name of the symbol, depending on how it will be searched for.
980 If there is no distinct demangled name, then returns the same value
981 (same pointer) as SYMBOL_LINKAGE_NAME. */
984 symbol_search_name (const struct general_symbol_info *gsymbol)
986 if (gsymbol->language == language_ada)
987 return gsymbol->name;
989 return symbol_natural_name (gsymbol);
995 symbol_matches_search_name (const struct general_symbol_info *gsymbol,
996 const lookup_name_info &name)
998 symbol_name_matcher_ftype *name_match
999 = get_symbol_name_matcher (language_def (gsymbol->language), name);
1000 return name_match (symbol_search_name (gsymbol), name, NULL);
1005 /* Return 1 if the two sections are the same, or if they could
1006 plausibly be copies of each other, one in an original object
1007 file and another in a separated debug file. */
1010 matching_obj_sections (struct obj_section *obj_first,
1011 struct obj_section *obj_second)
1013 asection *first = obj_first? obj_first->the_bfd_section : NULL;
1014 asection *second = obj_second? obj_second->the_bfd_section : NULL;
1016 /* If they're the same section, then they match. */
1017 if (first == second)
1020 /* If either is NULL, give up. */
1021 if (first == NULL || second == NULL)
1024 /* This doesn't apply to absolute symbols. */
1025 if (first->owner == NULL || second->owner == NULL)
1028 /* If they're in the same object file, they must be different sections. */
1029 if (first->owner == second->owner)
1032 /* Check whether the two sections are potentially corresponding. They must
1033 have the same size, address, and name. We can't compare section indexes,
1034 which would be more reliable, because some sections may have been
1036 if (bfd_get_section_size (first) != bfd_get_section_size (second))
1039 /* In-memory addresses may start at a different offset, relativize them. */
1040 if (bfd_get_section_vma (first->owner, first)
1041 - bfd_get_start_address (first->owner)
1042 != bfd_get_section_vma (second->owner, second)
1043 - bfd_get_start_address (second->owner))
1046 if (bfd_get_section_name (first->owner, first) == NULL
1047 || bfd_get_section_name (second->owner, second) == NULL
1048 || strcmp (bfd_get_section_name (first->owner, first),
1049 bfd_get_section_name (second->owner, second)) != 0)
1052 /* Otherwise check that they are in corresponding objfiles. */
1054 struct objfile *obj = NULL;
1055 for (objfile *objfile : current_program_space->objfiles ())
1056 if (objfile->obfd == first->owner)
1061 gdb_assert (obj != NULL);
1063 if (obj->separate_debug_objfile != NULL
1064 && obj->separate_debug_objfile->obfd == second->owner)
1066 if (obj->separate_debug_objfile_backlink != NULL
1067 && obj->separate_debug_objfile_backlink->obfd == second->owner)
1076 expand_symtab_containing_pc (CORE_ADDR pc, struct obj_section *section)
1078 struct bound_minimal_symbol msymbol;
1080 /* If we know that this is not a text address, return failure. This is
1081 necessary because we loop based on texthigh and textlow, which do
1082 not include the data ranges. */
1083 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
1084 if (msymbol.minsym && msymbol.minsym->data_p ())
1087 for (objfile *objfile : current_program_space->objfiles ())
1089 struct compunit_symtab *cust = NULL;
1092 cust = objfile->sf->qf->find_pc_sect_compunit_symtab (objfile, msymbol,
1099 /* Hash function for the symbol cache. */
1102 hash_symbol_entry (const struct objfile *objfile_context,
1103 const char *name, domain_enum domain)
1105 unsigned int hash = (uintptr_t) objfile_context;
1108 hash += htab_hash_string (name);
1110 /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
1111 to map to the same slot. */
1112 if (domain == STRUCT_DOMAIN)
1113 hash += VAR_DOMAIN * 7;
1120 /* Equality function for the symbol cache. */
1123 eq_symbol_entry (const struct symbol_cache_slot *slot,
1124 const struct objfile *objfile_context,
1125 const char *name, domain_enum domain)
1127 const char *slot_name;
1128 domain_enum slot_domain;
1130 if (slot->state == SYMBOL_SLOT_UNUSED)
1133 if (slot->objfile_context != objfile_context)
1136 if (slot->state == SYMBOL_SLOT_NOT_FOUND)
1138 slot_name = slot->value.not_found.name;
1139 slot_domain = slot->value.not_found.domain;
1143 slot_name = SYMBOL_SEARCH_NAME (slot->value.found.symbol);
1144 slot_domain = SYMBOL_DOMAIN (slot->value.found.symbol);
1147 /* NULL names match. */
1148 if (slot_name == NULL && name == NULL)
1150 /* But there's no point in calling symbol_matches_domain in the
1151 SYMBOL_SLOT_FOUND case. */
1152 if (slot_domain != domain)
1155 else if (slot_name != NULL && name != NULL)
1157 /* It's important that we use the same comparison that was done
1158 the first time through. If the slot records a found symbol,
1159 then this means using the symbol name comparison function of
1160 the symbol's language with SYMBOL_SEARCH_NAME. See
1161 dictionary.c. It also means using symbol_matches_domain for
1162 found symbols. See block.c.
1164 If the slot records a not-found symbol, then require a precise match.
1165 We could still be lax with whitespace like strcmp_iw though. */
1167 if (slot->state == SYMBOL_SLOT_NOT_FOUND)
1169 if (strcmp (slot_name, name) != 0)
1171 if (slot_domain != domain)
1176 struct symbol *sym = slot->value.found.symbol;
1177 lookup_name_info lookup_name (name, symbol_name_match_type::FULL);
1179 if (!SYMBOL_MATCHES_SEARCH_NAME (sym, lookup_name))
1182 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1183 slot_domain, domain))
1189 /* Only one name is NULL. */
1196 /* Given a cache of size SIZE, return the size of the struct (with variable
1197 length array) in bytes. */
1200 symbol_cache_byte_size (unsigned int size)
1202 return (sizeof (struct block_symbol_cache)
1203 + ((size - 1) * sizeof (struct symbol_cache_slot)));
1209 resize_symbol_cache (struct symbol_cache *cache, unsigned int new_size)
1211 /* If there's no change in size, don't do anything.
1212 All caches have the same size, so we can just compare with the size
1213 of the global symbols cache. */
1214 if ((cache->global_symbols != NULL
1215 && cache->global_symbols->size == new_size)
1216 || (cache->global_symbols == NULL
1220 xfree (cache->global_symbols);
1221 xfree (cache->static_symbols);
1225 cache->global_symbols = NULL;
1226 cache->static_symbols = NULL;
1230 size_t total_size = symbol_cache_byte_size (new_size);
1232 cache->global_symbols
1233 = (struct block_symbol_cache *) xcalloc (1, total_size);
1234 cache->static_symbols
1235 = (struct block_symbol_cache *) xcalloc (1, total_size);
1236 cache->global_symbols->size = new_size;
1237 cache->static_symbols->size = new_size;
1241 /* Return the symbol cache of PSPACE.
1242 Create one if it doesn't exist yet. */
1244 static struct symbol_cache *
1245 get_symbol_cache (struct program_space *pspace)
1247 struct symbol_cache *cache = symbol_cache_key.get (pspace);
1251 cache = symbol_cache_key.emplace (pspace);
1252 resize_symbol_cache (cache, symbol_cache_size);
1258 /* Set the size of the symbol cache in all program spaces. */
1261 set_symbol_cache_size (unsigned int new_size)
1263 struct program_space *pspace;
1265 ALL_PSPACES (pspace)
1267 struct symbol_cache *cache = symbol_cache_key.get (pspace);
1269 /* The pspace could have been created but not have a cache yet. */
1271 resize_symbol_cache (cache, new_size);
1275 /* Called when symbol-cache-size is set. */
1278 set_symbol_cache_size_handler (const char *args, int from_tty,
1279 struct cmd_list_element *c)
1281 if (new_symbol_cache_size > MAX_SYMBOL_CACHE_SIZE)
1283 /* Restore the previous value.
1284 This is the value the "show" command prints. */
1285 new_symbol_cache_size = symbol_cache_size;
1287 error (_("Symbol cache size is too large, max is %u."),
1288 MAX_SYMBOL_CACHE_SIZE);
1290 symbol_cache_size = new_symbol_cache_size;
1292 set_symbol_cache_size (symbol_cache_size);
1295 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1296 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1297 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1298 failed (and thus this one will too), or NULL if the symbol is not present
1300 If the symbol is not present in the cache, then *BSC_PTR and *SLOT_PTR are
1301 set to the cache and slot of the symbol to save the result of a full lookup
1304 static struct block_symbol
1305 symbol_cache_lookup (struct symbol_cache *cache,
1306 struct objfile *objfile_context, int block,
1307 const char *name, domain_enum domain,
1308 struct block_symbol_cache **bsc_ptr,
1309 struct symbol_cache_slot **slot_ptr)
1311 struct block_symbol_cache *bsc;
1313 struct symbol_cache_slot *slot;
1315 if (block == GLOBAL_BLOCK)
1316 bsc = cache->global_symbols;
1318 bsc = cache->static_symbols;
1326 hash = hash_symbol_entry (objfile_context, name, domain);
1327 slot = bsc->symbols + hash % bsc->size;
1329 if (eq_symbol_entry (slot, objfile_context, name, domain))
1331 if (symbol_lookup_debug)
1332 fprintf_unfiltered (gdb_stdlog,
1333 "%s block symbol cache hit%s for %s, %s\n",
1334 block == GLOBAL_BLOCK ? "Global" : "Static",
1335 slot->state == SYMBOL_SLOT_NOT_FOUND
1336 ? " (not found)" : "",
1337 name, domain_name (domain));
1339 if (slot->state == SYMBOL_SLOT_NOT_FOUND)
1340 return SYMBOL_LOOKUP_FAILED;
1341 return slot->value.found;
1344 /* Symbol is not present in the cache. */
1349 if (symbol_lookup_debug)
1351 fprintf_unfiltered (gdb_stdlog,
1352 "%s block symbol cache miss for %s, %s\n",
1353 block == GLOBAL_BLOCK ? "Global" : "Static",
1354 name, domain_name (domain));
1360 /* Clear out SLOT. */
1363 symbol_cache_clear_slot (struct symbol_cache_slot *slot)
1365 if (slot->state == SYMBOL_SLOT_NOT_FOUND)
1366 xfree (slot->value.not_found.name);
1367 slot->state = SYMBOL_SLOT_UNUSED;
1370 /* Mark SYMBOL as found in SLOT.
1371 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1372 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1373 necessarily the objfile the symbol was found in. */
1376 symbol_cache_mark_found (struct block_symbol_cache *bsc,
1377 struct symbol_cache_slot *slot,
1378 struct objfile *objfile_context,
1379 struct symbol *symbol,
1380 const struct block *block)
1384 if (slot->state != SYMBOL_SLOT_UNUSED)
1387 symbol_cache_clear_slot (slot);
1389 slot->state = SYMBOL_SLOT_FOUND;
1390 slot->objfile_context = objfile_context;
1391 slot->value.found.symbol = symbol;
1392 slot->value.found.block = block;
1395 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1396 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1397 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1400 symbol_cache_mark_not_found (struct block_symbol_cache *bsc,
1401 struct symbol_cache_slot *slot,
1402 struct objfile *objfile_context,
1403 const char *name, domain_enum domain)
1407 if (slot->state != SYMBOL_SLOT_UNUSED)
1410 symbol_cache_clear_slot (slot);
1412 slot->state = SYMBOL_SLOT_NOT_FOUND;
1413 slot->objfile_context = objfile_context;
1414 slot->value.not_found.name = xstrdup (name);
1415 slot->value.not_found.domain = domain;
1418 /* Flush the symbol cache of PSPACE. */
1421 symbol_cache_flush (struct program_space *pspace)
1423 struct symbol_cache *cache = symbol_cache_key.get (pspace);
1428 if (cache->global_symbols == NULL)
1430 gdb_assert (symbol_cache_size == 0);
1431 gdb_assert (cache->static_symbols == NULL);
1435 /* If the cache is untouched since the last flush, early exit.
1436 This is important for performance during the startup of a program linked
1437 with 100s (or 1000s) of shared libraries. */
1438 if (cache->global_symbols->misses == 0
1439 && cache->static_symbols->misses == 0)
1442 gdb_assert (cache->global_symbols->size == symbol_cache_size);
1443 gdb_assert (cache->static_symbols->size == symbol_cache_size);
1445 for (pass = 0; pass < 2; ++pass)
1447 struct block_symbol_cache *bsc
1448 = pass == 0 ? cache->global_symbols : cache->static_symbols;
1451 for (i = 0; i < bsc->size; ++i)
1452 symbol_cache_clear_slot (&bsc->symbols[i]);
1455 cache->global_symbols->hits = 0;
1456 cache->global_symbols->misses = 0;
1457 cache->global_symbols->collisions = 0;
1458 cache->static_symbols->hits = 0;
1459 cache->static_symbols->misses = 0;
1460 cache->static_symbols->collisions = 0;
1466 symbol_cache_dump (const struct symbol_cache *cache)
1470 if (cache->global_symbols == NULL)
1472 printf_filtered (" <disabled>\n");
1476 for (pass = 0; pass < 2; ++pass)
1478 const struct block_symbol_cache *bsc
1479 = pass == 0 ? cache->global_symbols : cache->static_symbols;
1483 printf_filtered ("Global symbols:\n");
1485 printf_filtered ("Static symbols:\n");
1487 for (i = 0; i < bsc->size; ++i)
1489 const struct symbol_cache_slot *slot = &bsc->symbols[i];
1493 switch (slot->state)
1495 case SYMBOL_SLOT_UNUSED:
1497 case SYMBOL_SLOT_NOT_FOUND:
1498 printf_filtered (" [%4u] = %s, %s %s (not found)\n", i,
1499 host_address_to_string (slot->objfile_context),
1500 slot->value.not_found.name,
1501 domain_name (slot->value.not_found.domain));
1503 case SYMBOL_SLOT_FOUND:
1505 struct symbol *found = slot->value.found.symbol;
1506 const struct objfile *context = slot->objfile_context;
1508 printf_filtered (" [%4u] = %s, %s %s\n", i,
1509 host_address_to_string (context),
1510 SYMBOL_PRINT_NAME (found),
1511 domain_name (SYMBOL_DOMAIN (found)));
1519 /* The "mt print symbol-cache" command. */
1522 maintenance_print_symbol_cache (const char *args, int from_tty)
1524 struct program_space *pspace;
1526 ALL_PSPACES (pspace)
1528 struct symbol_cache *cache;
1530 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1532 pspace->symfile_object_file != NULL
1533 ? objfile_name (pspace->symfile_object_file)
1534 : "(no object file)");
1536 /* If the cache hasn't been created yet, avoid creating one. */
1537 cache = symbol_cache_key.get (pspace);
1539 printf_filtered (" <empty>\n");
1541 symbol_cache_dump (cache);
1545 /* The "mt flush-symbol-cache" command. */
1548 maintenance_flush_symbol_cache (const char *args, int from_tty)
1550 struct program_space *pspace;
1552 ALL_PSPACES (pspace)
1554 symbol_cache_flush (pspace);
1558 /* Print usage statistics of CACHE. */
1561 symbol_cache_stats (struct symbol_cache *cache)
1565 if (cache->global_symbols == NULL)
1567 printf_filtered (" <disabled>\n");
1571 for (pass = 0; pass < 2; ++pass)
1573 const struct block_symbol_cache *bsc
1574 = pass == 0 ? cache->global_symbols : cache->static_symbols;
1579 printf_filtered ("Global block cache stats:\n");
1581 printf_filtered ("Static block cache stats:\n");
1583 printf_filtered (" size: %u\n", bsc->size);
1584 printf_filtered (" hits: %u\n", bsc->hits);
1585 printf_filtered (" misses: %u\n", bsc->misses);
1586 printf_filtered (" collisions: %u\n", bsc->collisions);
1590 /* The "mt print symbol-cache-statistics" command. */
1593 maintenance_print_symbol_cache_statistics (const char *args, int from_tty)
1595 struct program_space *pspace;
1597 ALL_PSPACES (pspace)
1599 struct symbol_cache *cache;
1601 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1603 pspace->symfile_object_file != NULL
1604 ? objfile_name (pspace->symfile_object_file)
1605 : "(no object file)");
1607 /* If the cache hasn't been created yet, avoid creating one. */
1608 cache = symbol_cache_key.get (pspace);
1610 printf_filtered (" empty, no stats available\n");
1612 symbol_cache_stats (cache);
1616 /* This module's 'new_objfile' observer. */
1619 symtab_new_objfile_observer (struct objfile *objfile)
1621 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1622 symbol_cache_flush (current_program_space);
1625 /* This module's 'free_objfile' observer. */
1628 symtab_free_objfile_observer (struct objfile *objfile)
1630 symbol_cache_flush (objfile->pspace);
1633 /* Debug symbols usually don't have section information. We need to dig that
1634 out of the minimal symbols and stash that in the debug symbol. */
1637 fixup_section (struct general_symbol_info *ginfo,
1638 CORE_ADDR addr, struct objfile *objfile)
1640 struct minimal_symbol *msym;
1642 /* First, check whether a minimal symbol with the same name exists
1643 and points to the same address. The address check is required
1644 e.g. on PowerPC64, where the minimal symbol for a function will
1645 point to the function descriptor, while the debug symbol will
1646 point to the actual function code. */
1647 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1649 ginfo->section = MSYMBOL_SECTION (msym);
1652 /* Static, function-local variables do appear in the linker
1653 (minimal) symbols, but are frequently given names that won't
1654 be found via lookup_minimal_symbol(). E.g., it has been
1655 observed in frv-uclinux (ELF) executables that a static,
1656 function-local variable named "foo" might appear in the
1657 linker symbols as "foo.6" or "foo.3". Thus, there is no
1658 point in attempting to extend the lookup-by-name mechanism to
1659 handle this case due to the fact that there can be multiple
1662 So, instead, search the section table when lookup by name has
1663 failed. The ``addr'' and ``endaddr'' fields may have already
1664 been relocated. If so, the relocation offset (i.e. the
1665 ANOFFSET value) needs to be subtracted from these values when
1666 performing the comparison. We unconditionally subtract it,
1667 because, when no relocation has been performed, the ANOFFSET
1668 value will simply be zero.
1670 The address of the symbol whose section we're fixing up HAS
1671 NOT BEEN adjusted (relocated) yet. It can't have been since
1672 the section isn't yet known and knowing the section is
1673 necessary in order to add the correct relocation value. In
1674 other words, we wouldn't even be in this function (attempting
1675 to compute the section) if it were already known.
1677 Note that it is possible to search the minimal symbols
1678 (subtracting the relocation value if necessary) to find the
1679 matching minimal symbol, but this is overkill and much less
1680 efficient. It is not necessary to find the matching minimal
1681 symbol, only its section.
1683 Note that this technique (of doing a section table search)
1684 can fail when unrelocated section addresses overlap. For
1685 this reason, we still attempt a lookup by name prior to doing
1686 a search of the section table. */
1688 struct obj_section *s;
1691 ALL_OBJFILE_OSECTIONS (objfile, s)
1693 int idx = s - objfile->sections;
1694 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1699 if (obj_section_addr (s) - offset <= addr
1700 && addr < obj_section_endaddr (s) - offset)
1702 ginfo->section = idx;
1707 /* If we didn't find the section, assume it is in the first
1708 section. If there is no allocated section, then it hardly
1709 matters what we pick, so just pick zero. */
1713 ginfo->section = fallback;
1718 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1725 if (!SYMBOL_OBJFILE_OWNED (sym))
1728 /* We either have an OBJFILE, or we can get at it from the sym's
1729 symtab. Anything else is a bug. */
1730 gdb_assert (objfile || symbol_symtab (sym));
1732 if (objfile == NULL)
1733 objfile = symbol_objfile (sym);
1735 if (SYMBOL_OBJ_SECTION (objfile, sym))
1738 /* We should have an objfile by now. */
1739 gdb_assert (objfile);
1741 switch (SYMBOL_CLASS (sym))
1745 addr = SYMBOL_VALUE_ADDRESS (sym);
1748 addr = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym));
1752 /* Nothing else will be listed in the minsyms -- no use looking
1757 fixup_section (&sym->ginfo, addr, objfile);
1764 demangle_for_lookup_info::demangle_for_lookup_info
1765 (const lookup_name_info &lookup_name, language lang)
1767 demangle_result_storage storage;
1769 if (lookup_name.ignore_parameters () && lang == language_cplus)
1771 gdb::unique_xmalloc_ptr<char> without_params
1772 = cp_remove_params_if_any (lookup_name.name ().c_str (),
1773 lookup_name.completion_mode ());
1775 if (without_params != NULL)
1777 if (lookup_name.match_type () != symbol_name_match_type::SEARCH_NAME)
1778 m_demangled_name = demangle_for_lookup (without_params.get (),
1784 if (lookup_name.match_type () == symbol_name_match_type::SEARCH_NAME)
1785 m_demangled_name = lookup_name.name ();
1787 m_demangled_name = demangle_for_lookup (lookup_name.name ().c_str (),
1793 const lookup_name_info &
1794 lookup_name_info::match_any ()
1796 /* Lookup any symbol that "" would complete. I.e., this matches all
1798 static const lookup_name_info lookup_name ({}, symbol_name_match_type::FULL,
1804 /* Compute the demangled form of NAME as used by the various symbol
1805 lookup functions. The result can either be the input NAME
1806 directly, or a pointer to a buffer owned by the STORAGE object.
1808 For Ada, this function just returns NAME, unmodified.
1809 Normally, Ada symbol lookups are performed using the encoded name
1810 rather than the demangled name, and so it might seem to make sense
1811 for this function to return an encoded version of NAME.
1812 Unfortunately, we cannot do this, because this function is used in
1813 circumstances where it is not appropriate to try to encode NAME.
1814 For instance, when displaying the frame info, we demangle the name
1815 of each parameter, and then perform a symbol lookup inside our
1816 function using that demangled name. In Ada, certain functions
1817 have internally-generated parameters whose name contain uppercase
1818 characters. Encoding those name would result in those uppercase
1819 characters to become lowercase, and thus cause the symbol lookup
1823 demangle_for_lookup (const char *name, enum language lang,
1824 demangle_result_storage &storage)
1826 /* If we are using C++, D, or Go, demangle the name before doing a
1827 lookup, so we can always binary search. */
1828 if (lang == language_cplus)
1830 char *demangled_name = gdb_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1831 if (demangled_name != NULL)
1832 return storage.set_malloc_ptr (demangled_name);
1834 /* If we were given a non-mangled name, canonicalize it
1835 according to the language (so far only for C++). */
1836 std::string canon = cp_canonicalize_string (name);
1837 if (!canon.empty ())
1838 return storage.swap_string (canon);
1840 else if (lang == language_d)
1842 char *demangled_name = d_demangle (name, 0);
1843 if (demangled_name != NULL)
1844 return storage.set_malloc_ptr (demangled_name);
1846 else if (lang == language_go)
1848 char *demangled_name = go_demangle (name, 0);
1849 if (demangled_name != NULL)
1850 return storage.set_malloc_ptr (demangled_name);
1859 search_name_hash (enum language language, const char *search_name)
1861 return language_def (language)->la_search_name_hash (search_name);
1866 This function (or rather its subordinates) have a bunch of loops and
1867 it would seem to be attractive to put in some QUIT's (though I'm not really
1868 sure whether it can run long enough to be really important). But there
1869 are a few calls for which it would appear to be bad news to quit
1870 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1871 that there is C++ code below which can error(), but that probably
1872 doesn't affect these calls since they are looking for a known
1873 variable and thus can probably assume it will never hit the C++
1877 lookup_symbol_in_language (const char *name, const struct block *block,
1878 const domain_enum domain, enum language lang,
1879 struct field_of_this_result *is_a_field_of_this)
1881 demangle_result_storage storage;
1882 const char *modified_name = demangle_for_lookup (name, lang, storage);
1884 return lookup_symbol_aux (modified_name,
1885 symbol_name_match_type::FULL,
1886 block, domain, lang,
1887 is_a_field_of_this);
1893 lookup_symbol (const char *name, const struct block *block,
1895 struct field_of_this_result *is_a_field_of_this)
1897 return lookup_symbol_in_language (name, block, domain,
1898 current_language->la_language,
1899 is_a_field_of_this);
1905 lookup_symbol_search_name (const char *search_name, const struct block *block,
1908 return lookup_symbol_aux (search_name, symbol_name_match_type::SEARCH_NAME,
1909 block, domain, language_asm, NULL);
1915 lookup_language_this (const struct language_defn *lang,
1916 const struct block *block)
1918 if (lang->la_name_of_this == NULL || block == NULL)
1921 if (symbol_lookup_debug > 1)
1923 struct objfile *objfile = lookup_objfile_from_block (block);
1925 fprintf_unfiltered (gdb_stdlog,
1926 "lookup_language_this (%s, %s (objfile %s))",
1927 lang->la_name, host_address_to_string (block),
1928 objfile_debug_name (objfile));
1935 sym = block_lookup_symbol (block, lang->la_name_of_this,
1936 symbol_name_match_type::SEARCH_NAME,
1940 if (symbol_lookup_debug > 1)
1942 fprintf_unfiltered (gdb_stdlog, " = %s (%s, block %s)\n",
1943 SYMBOL_PRINT_NAME (sym),
1944 host_address_to_string (sym),
1945 host_address_to_string (block));
1947 return (struct block_symbol) {sym, block};
1949 if (BLOCK_FUNCTION (block))
1951 block = BLOCK_SUPERBLOCK (block);
1954 if (symbol_lookup_debug > 1)
1955 fprintf_unfiltered (gdb_stdlog, " = NULL\n");
1959 /* Given TYPE, a structure/union,
1960 return 1 if the component named NAME from the ultimate target
1961 structure/union is defined, otherwise, return 0. */
1964 check_field (struct type *type, const char *name,
1965 struct field_of_this_result *is_a_field_of_this)
1969 /* The type may be a stub. */
1970 type = check_typedef (type);
1972 for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
1974 const char *t_field_name = TYPE_FIELD_NAME (type, i);
1976 if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
1978 is_a_field_of_this->type = type;
1979 is_a_field_of_this->field = &TYPE_FIELD (type, i);
1984 /* C++: If it was not found as a data field, then try to return it
1985 as a pointer to a method. */
1987 for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
1989 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0)
1991 is_a_field_of_this->type = type;
1992 is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i);
1997 for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
1998 if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this))
2004 /* Behave like lookup_symbol except that NAME is the natural name
2005 (e.g., demangled name) of the symbol that we're looking for. */
2007 static struct block_symbol
2008 lookup_symbol_aux (const char *name, symbol_name_match_type match_type,
2009 const struct block *block,
2010 const domain_enum domain, enum language language,
2011 struct field_of_this_result *is_a_field_of_this)
2013 struct block_symbol result;
2014 const struct language_defn *langdef;
2016 if (symbol_lookup_debug)
2018 struct objfile *objfile = lookup_objfile_from_block (block);
2020 fprintf_unfiltered (gdb_stdlog,
2021 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2022 name, host_address_to_string (block),
2024 ? objfile_debug_name (objfile) : "NULL",
2025 domain_name (domain), language_str (language));
2028 /* Make sure we do something sensible with is_a_field_of_this, since
2029 the callers that set this parameter to some non-null value will
2030 certainly use it later. If we don't set it, the contents of
2031 is_a_field_of_this are undefined. */
2032 if (is_a_field_of_this != NULL)
2033 memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this));
2035 /* Search specified block and its superiors. Don't search
2036 STATIC_BLOCK or GLOBAL_BLOCK. */
2038 result = lookup_local_symbol (name, match_type, block, domain, language);
2039 if (result.symbol != NULL)
2041 if (symbol_lookup_debug)
2043 fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n",
2044 host_address_to_string (result.symbol));
2049 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2050 check to see if NAME is a field of `this'. */
2052 langdef = language_def (language);
2054 /* Don't do this check if we are searching for a struct. It will
2055 not be found by check_field, but will be found by other
2057 if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN)
2059 result = lookup_language_this (langdef, block);
2063 struct type *t = result.symbol->type;
2065 /* I'm not really sure that type of this can ever
2066 be typedefed; just be safe. */
2067 t = check_typedef (t);
2068 if (TYPE_CODE (t) == TYPE_CODE_PTR || TYPE_IS_REFERENCE (t))
2069 t = TYPE_TARGET_TYPE (t);
2071 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
2072 && TYPE_CODE (t) != TYPE_CODE_UNION)
2073 error (_("Internal error: `%s' is not an aggregate"),
2074 langdef->la_name_of_this);
2076 if (check_field (t, name, is_a_field_of_this))
2078 if (symbol_lookup_debug)
2080 fprintf_unfiltered (gdb_stdlog,
2081 "lookup_symbol_aux (...) = NULL\n");
2088 /* Now do whatever is appropriate for LANGUAGE to look
2089 up static and global variables. */
2091 result = langdef->la_lookup_symbol_nonlocal (langdef, name, block, domain);
2092 if (result.symbol != NULL)
2094 if (symbol_lookup_debug)
2096 fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n",
2097 host_address_to_string (result.symbol));
2102 /* Now search all static file-level symbols. Not strictly correct,
2103 but more useful than an error. */
2105 result = lookup_static_symbol (name, domain);
2106 if (symbol_lookup_debug)
2108 fprintf_unfiltered (gdb_stdlog, "lookup_symbol_aux (...) = %s\n",
2109 result.symbol != NULL
2110 ? host_address_to_string (result.symbol)
2116 /* Check to see if the symbol is defined in BLOCK or its superiors.
2117 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2119 static struct block_symbol
2120 lookup_local_symbol (const char *name,
2121 symbol_name_match_type match_type,
2122 const struct block *block,
2123 const domain_enum domain,
2124 enum language language)
2127 const struct block *static_block = block_static_block (block);
2128 const char *scope = block_scope (block);
2130 /* Check if either no block is specified or it's a global block. */
2132 if (static_block == NULL)
2135 while (block != static_block)
2137 sym = lookup_symbol_in_block (name, match_type, block, domain);
2139 return (struct block_symbol) {sym, block};
2141 if (language == language_cplus || language == language_fortran)
2143 struct block_symbol blocksym
2144 = cp_lookup_symbol_imports_or_template (scope, name, block,
2147 if (blocksym.symbol != NULL)
2151 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
2153 block = BLOCK_SUPERBLOCK (block);
2156 /* We've reached the end of the function without finding a result. */
2164 lookup_objfile_from_block (const struct block *block)
2169 block = block_global_block (block);
2170 /* Look through all blockvectors. */
2171 for (objfile *obj : current_program_space->objfiles ())
2173 for (compunit_symtab *cust : obj->compunits ())
2174 if (block == BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust),
2177 if (obj->separate_debug_objfile_backlink)
2178 obj = obj->separate_debug_objfile_backlink;
2190 lookup_symbol_in_block (const char *name, symbol_name_match_type match_type,
2191 const struct block *block,
2192 const domain_enum domain)
2196 if (symbol_lookup_debug > 1)
2198 struct objfile *objfile = lookup_objfile_from_block (block);
2200 fprintf_unfiltered (gdb_stdlog,
2201 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2202 name, host_address_to_string (block),
2203 objfile_debug_name (objfile),
2204 domain_name (domain));
2207 sym = block_lookup_symbol (block, name, match_type, domain);
2210 if (symbol_lookup_debug > 1)
2212 fprintf_unfiltered (gdb_stdlog, " = %s\n",
2213 host_address_to_string (sym));
2215 return fixup_symbol_section (sym, NULL);
2218 if (symbol_lookup_debug > 1)
2219 fprintf_unfiltered (gdb_stdlog, " = NULL\n");
2226 lookup_global_symbol_from_objfile (struct objfile *main_objfile,
2228 const domain_enum domain)
2230 for (objfile *objfile : main_objfile->separate_debug_objfiles ())
2232 struct block_symbol result
2233 = lookup_symbol_in_objfile (objfile, GLOBAL_BLOCK, name, domain);
2235 if (result.symbol != NULL)
2242 /* Check to see if the symbol is defined in one of the OBJFILE's
2243 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2244 depending on whether or not we want to search global symbols or
2247 static struct block_symbol
2248 lookup_symbol_in_objfile_symtabs (struct objfile *objfile,
2249 enum block_enum block_index, const char *name,
2250 const domain_enum domain)
2252 gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK);
2254 if (symbol_lookup_debug > 1)
2256 fprintf_unfiltered (gdb_stdlog,
2257 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2258 objfile_debug_name (objfile),
2259 block_index == GLOBAL_BLOCK
2260 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2261 name, domain_name (domain));
2264 for (compunit_symtab *cust : objfile->compunits ())
2266 const struct blockvector *bv;
2267 const struct block *block;
2268 struct block_symbol result;
2270 bv = COMPUNIT_BLOCKVECTOR (cust);
2271 block = BLOCKVECTOR_BLOCK (bv, block_index);
2272 result.symbol = block_lookup_symbol_primary (block, name, domain);
2273 result.block = block;
2274 if (result.symbol != NULL)
2276 if (symbol_lookup_debug > 1)
2278 fprintf_unfiltered (gdb_stdlog, " = %s (block %s)\n",
2279 host_address_to_string (result.symbol),
2280 host_address_to_string (block));
2282 result.symbol = fixup_symbol_section (result.symbol, objfile);
2288 if (symbol_lookup_debug > 1)
2289 fprintf_unfiltered (gdb_stdlog, " = NULL\n");
2293 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2294 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2295 and all associated separate debug objfiles.
2297 Normally we only look in OBJFILE, and not any separate debug objfiles
2298 because the outer loop will cause them to be searched too. This case is
2299 different. Here we're called from search_symbols where it will only
2300 call us for the objfile that contains a matching minsym. */
2302 static struct block_symbol
2303 lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
2304 const char *linkage_name,
2307 enum language lang = current_language->la_language;
2308 struct objfile *main_objfile;
2310 demangle_result_storage storage;
2311 const char *modified_name = demangle_for_lookup (linkage_name, lang, storage);
2313 if (objfile->separate_debug_objfile_backlink)
2314 main_objfile = objfile->separate_debug_objfile_backlink;
2316 main_objfile = objfile;
2318 for (::objfile *cur_objfile : main_objfile->separate_debug_objfiles ())
2320 struct block_symbol result;
2322 result = lookup_symbol_in_objfile_symtabs (cur_objfile, GLOBAL_BLOCK,
2323 modified_name, domain);
2324 if (result.symbol == NULL)
2325 result = lookup_symbol_in_objfile_symtabs (cur_objfile, STATIC_BLOCK,
2326 modified_name, domain);
2327 if (result.symbol != NULL)
2334 /* A helper function that throws an exception when a symbol was found
2335 in a psymtab but not in a symtab. */
2337 static void ATTRIBUTE_NORETURN
2338 error_in_psymtab_expansion (int block_index, const char *name,
2339 struct compunit_symtab *cust)
2342 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2343 %s may be an inlined function, or may be a template function\n \
2344 (if a template, try specifying an instantiation: %s<type>)."),
2345 block_index == GLOBAL_BLOCK ? "global" : "static",
2347 symtab_to_filename_for_display (compunit_primary_filetab (cust)),
2351 /* A helper function for various lookup routines that interfaces with
2352 the "quick" symbol table functions. */
2354 static struct block_symbol
2355 lookup_symbol_via_quick_fns (struct objfile *objfile, int block_index,
2356 const char *name, const domain_enum domain)
2358 struct compunit_symtab *cust;
2359 const struct blockvector *bv;
2360 const struct block *block;
2361 struct block_symbol result;
2366 if (symbol_lookup_debug > 1)
2368 fprintf_unfiltered (gdb_stdlog,
2369 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2370 objfile_debug_name (objfile),
2371 block_index == GLOBAL_BLOCK
2372 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2373 name, domain_name (domain));
2376 cust = objfile->sf->qf->lookup_symbol (objfile, block_index, name, domain);
2379 if (symbol_lookup_debug > 1)
2381 fprintf_unfiltered (gdb_stdlog,
2382 "lookup_symbol_via_quick_fns (...) = NULL\n");
2387 bv = COMPUNIT_BLOCKVECTOR (cust);
2388 block = BLOCKVECTOR_BLOCK (bv, block_index);
2389 result.symbol = block_lookup_symbol (block, name,
2390 symbol_name_match_type::FULL, domain);
2391 if (result.symbol == NULL)
2392 error_in_psymtab_expansion (block_index, name, cust);
2394 if (symbol_lookup_debug > 1)
2396 fprintf_unfiltered (gdb_stdlog,
2397 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2398 host_address_to_string (result.symbol),
2399 host_address_to_string (block));
2402 result.symbol = fixup_symbol_section (result.symbol, objfile);
2403 result.block = block;
2410 basic_lookup_symbol_nonlocal (const struct language_defn *langdef,
2412 const struct block *block,
2413 const domain_enum domain)
2415 struct block_symbol result;
2417 /* NOTE: carlton/2003-05-19: The comments below were written when
2418 this (or what turned into this) was part of lookup_symbol_aux;
2419 I'm much less worried about these questions now, since these
2420 decisions have turned out well, but I leave these comments here
2423 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2424 not it would be appropriate to search the current global block
2425 here as well. (That's what this code used to do before the
2426 is_a_field_of_this check was moved up.) On the one hand, it's
2427 redundant with the lookup in all objfiles search that happens
2428 next. On the other hand, if decode_line_1 is passed an argument
2429 like filename:var, then the user presumably wants 'var' to be
2430 searched for in filename. On the third hand, there shouldn't be
2431 multiple global variables all of which are named 'var', and it's
2432 not like decode_line_1 has ever restricted its search to only
2433 global variables in a single filename. All in all, only
2434 searching the static block here seems best: it's correct and it's
2437 /* NOTE: carlton/2002-12-05: There's also a possible performance
2438 issue here: if you usually search for global symbols in the
2439 current file, then it would be slightly better to search the
2440 current global block before searching all the symtabs. But there
2441 are other factors that have a much greater effect on performance
2442 than that one, so I don't think we should worry about that for
2445 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2446 the current objfile. Searching the current objfile first is useful
2447 for both matching user expectations as well as performance. */
2449 result = lookup_symbol_in_static_block (name, block, domain);
2450 if (result.symbol != NULL)
2453 /* If we didn't find a definition for a builtin type in the static block,
2454 search for it now. This is actually the right thing to do and can be
2455 a massive performance win. E.g., when debugging a program with lots of
2456 shared libraries we could search all of them only to find out the
2457 builtin type isn't defined in any of them. This is common for types
2459 if (domain == VAR_DOMAIN)
2461 struct gdbarch *gdbarch;
2464 gdbarch = target_gdbarch ();
2466 gdbarch = block_gdbarch (block);
2467 result.symbol = language_lookup_primitive_type_as_symbol (langdef,
2469 result.block = NULL;
2470 if (result.symbol != NULL)
2474 return lookup_global_symbol (name, block, domain);
2480 lookup_symbol_in_static_block (const char *name,
2481 const struct block *block,
2482 const domain_enum domain)
2484 const struct block *static_block = block_static_block (block);
2487 if (static_block == NULL)
2490 if (symbol_lookup_debug)
2492 struct objfile *objfile = lookup_objfile_from_block (static_block);
2494 fprintf_unfiltered (gdb_stdlog,
2495 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2498 host_address_to_string (block),
2499 objfile_debug_name (objfile),
2500 domain_name (domain));
2503 sym = lookup_symbol_in_block (name,
2504 symbol_name_match_type::FULL,
2505 static_block, domain);
2506 if (symbol_lookup_debug)
2508 fprintf_unfiltered (gdb_stdlog,
2509 "lookup_symbol_in_static_block (...) = %s\n",
2510 sym != NULL ? host_address_to_string (sym) : "NULL");
2512 return (struct block_symbol) {sym, static_block};
2515 /* Perform the standard symbol lookup of NAME in OBJFILE:
2516 1) First search expanded symtabs, and if not found
2517 2) Search the "quick" symtabs (partial or .gdb_index).
2518 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2520 static struct block_symbol
2521 lookup_symbol_in_objfile (struct objfile *objfile, enum block_enum block_index,
2522 const char *name, const domain_enum domain)
2524 struct block_symbol result;
2526 gdb_assert (block_index == GLOBAL_BLOCK || block_index == STATIC_BLOCK);
2528 if (symbol_lookup_debug)
2530 fprintf_unfiltered (gdb_stdlog,
2531 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2532 objfile_debug_name (objfile),
2533 block_index == GLOBAL_BLOCK
2534 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2535 name, domain_name (domain));
2538 result = lookup_symbol_in_objfile_symtabs (objfile, block_index,
2540 if (result.symbol != NULL)
2542 if (symbol_lookup_debug)
2544 fprintf_unfiltered (gdb_stdlog,
2545 "lookup_symbol_in_objfile (...) = %s"
2547 host_address_to_string (result.symbol));
2552 result = lookup_symbol_via_quick_fns (objfile, block_index,
2554 if (symbol_lookup_debug)
2556 fprintf_unfiltered (gdb_stdlog,
2557 "lookup_symbol_in_objfile (...) = %s%s\n",
2558 result.symbol != NULL
2559 ? host_address_to_string (result.symbol)
2561 result.symbol != NULL ? " (via quick fns)" : "");
2569 lookup_static_symbol (const char *name, const domain_enum domain)
2571 struct symbol_cache *cache = get_symbol_cache (current_program_space);
2572 struct block_symbol result;
2573 struct block_symbol_cache *bsc;
2574 struct symbol_cache_slot *slot;
2576 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2577 NULL for OBJFILE_CONTEXT. */
2578 result = symbol_cache_lookup (cache, NULL, STATIC_BLOCK, name, domain,
2580 if (result.symbol != NULL)
2582 if (SYMBOL_LOOKUP_FAILED_P (result))
2587 for (objfile *objfile : current_program_space->objfiles ())
2589 result = lookup_symbol_in_objfile (objfile, STATIC_BLOCK, name, domain);
2590 if (result.symbol != NULL)
2592 /* Still pass NULL for OBJFILE_CONTEXT here. */
2593 symbol_cache_mark_found (bsc, slot, NULL, result.symbol,
2599 /* Still pass NULL for OBJFILE_CONTEXT here. */
2600 symbol_cache_mark_not_found (bsc, slot, NULL, name, domain);
2604 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2606 struct global_sym_lookup_data
2608 /* The name of the symbol we are searching for. */
2611 /* The domain to use for our search. */
2614 /* The field where the callback should store the symbol if found.
2615 It should be initialized to {NULL, NULL} before the search is started. */
2616 struct block_symbol result;
2619 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2620 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2621 OBJFILE. The arguments for the search are passed via CB_DATA,
2622 which in reality is a pointer to struct global_sym_lookup_data. */
2625 lookup_symbol_global_iterator_cb (struct objfile *objfile,
2628 struct global_sym_lookup_data *data =
2629 (struct global_sym_lookup_data *) cb_data;
2631 gdb_assert (data->result.symbol == NULL
2632 && data->result.block == NULL);
2634 data->result = lookup_symbol_in_objfile (objfile, GLOBAL_BLOCK,
2635 data->name, data->domain);
2637 /* If we found a match, tell the iterator to stop. Otherwise,
2639 return (data->result.symbol != NULL);
2645 lookup_global_symbol (const char *name,
2646 const struct block *block,
2647 const domain_enum domain)
2649 struct symbol_cache *cache = get_symbol_cache (current_program_space);
2650 struct block_symbol result;
2651 struct objfile *objfile;
2652 struct global_sym_lookup_data lookup_data;
2653 struct block_symbol_cache *bsc;
2654 struct symbol_cache_slot *slot;
2656 objfile = lookup_objfile_from_block (block);
2658 /* First see if we can find the symbol in the cache.
2659 This works because we use the current objfile to qualify the lookup. */
2660 result = symbol_cache_lookup (cache, objfile, GLOBAL_BLOCK, name, domain,
2662 if (result.symbol != NULL)
2664 if (SYMBOL_LOOKUP_FAILED_P (result))
2669 /* Call library-specific lookup procedure. */
2670 if (objfile != NULL)
2671 result = solib_global_lookup (objfile, name, domain);
2673 /* If that didn't work go a global search (of global blocks, heh). */
2674 if (result.symbol == NULL)
2676 memset (&lookup_data, 0, sizeof (lookup_data));
2677 lookup_data.name = name;
2678 lookup_data.domain = domain;
2679 gdbarch_iterate_over_objfiles_in_search_order
2680 (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (),
2681 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
2682 result = lookup_data.result;
2685 if (result.symbol != NULL)
2686 symbol_cache_mark_found (bsc, slot, objfile, result.symbol, result.block);
2688 symbol_cache_mark_not_found (bsc, slot, objfile, name, domain);
2694 symbol_matches_domain (enum language symbol_language,
2695 domain_enum symbol_domain,
2698 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2699 Similarly, any Ada type declaration implicitly defines a typedef. */
2700 if (symbol_language == language_cplus
2701 || symbol_language == language_d
2702 || symbol_language == language_ada
2703 || symbol_language == language_rust)
2705 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
2706 && symbol_domain == STRUCT_DOMAIN)
2709 /* For all other languages, strict match is required. */
2710 return (symbol_domain == domain);
2716 lookup_transparent_type (const char *name)
2718 return current_language->la_lookup_transparent_type (name);
2721 /* A helper for basic_lookup_transparent_type that interfaces with the
2722 "quick" symbol table functions. */
2724 static struct type *
2725 basic_lookup_transparent_type_quick (struct objfile *objfile, int block_index,
2728 struct compunit_symtab *cust;
2729 const struct blockvector *bv;
2730 const struct block *block;
2735 cust = objfile->sf->qf->lookup_symbol (objfile, block_index, name,
2740 bv = COMPUNIT_BLOCKVECTOR (cust);
2741 block = BLOCKVECTOR_BLOCK (bv, block_index);
2742 sym = block_find_symbol (block, name, STRUCT_DOMAIN,
2743 block_find_non_opaque_type, NULL);
2745 error_in_psymtab_expansion (block_index, name, cust);
2746 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)));
2747 return SYMBOL_TYPE (sym);
2750 /* Subroutine of basic_lookup_transparent_type to simplify it.
2751 Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
2752 BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */
2754 static struct type *
2755 basic_lookup_transparent_type_1 (struct objfile *objfile, int block_index,
2758 const struct blockvector *bv;
2759 const struct block *block;
2760 const struct symbol *sym;
2762 for (compunit_symtab *cust : objfile->compunits ())
2764 bv = COMPUNIT_BLOCKVECTOR (cust);
2765 block = BLOCKVECTOR_BLOCK (bv, block_index);
2766 sym = block_find_symbol (block, name, STRUCT_DOMAIN,
2767 block_find_non_opaque_type, NULL);
2770 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)));
2771 return SYMBOL_TYPE (sym);
2778 /* The standard implementation of lookup_transparent_type. This code
2779 was modeled on lookup_symbol -- the parts not relevant to looking
2780 up types were just left out. In particular it's assumed here that
2781 types are available in STRUCT_DOMAIN and only in file-static or
2785 basic_lookup_transparent_type (const char *name)
2789 /* Now search all the global symbols. Do the symtab's first, then
2790 check the psymtab's. If a psymtab indicates the existence
2791 of the desired name as a global, then do psymtab-to-symtab
2792 conversion on the fly and return the found symbol. */
2794 for (objfile *objfile : current_program_space->objfiles ())
2796 t = basic_lookup_transparent_type_1 (objfile, GLOBAL_BLOCK, name);
2801 for (objfile *objfile : current_program_space->objfiles ())
2803 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
2808 /* Now search the static file-level symbols.
2809 Not strictly correct, but more useful than an error.
2810 Do the symtab's first, then
2811 check the psymtab's. If a psymtab indicates the existence
2812 of the desired name as a file-level static, then do psymtab-to-symtab
2813 conversion on the fly and return the found symbol. */
2815 for (objfile *objfile : current_program_space->objfiles ())
2817 t = basic_lookup_transparent_type_1 (objfile, STATIC_BLOCK, name);
2822 for (objfile *objfile : current_program_space->objfiles ())
2824 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
2829 return (struct type *) 0;
2832 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2834 For each symbol that matches, CALLBACK is called. The symbol is
2835 passed to the callback.
2837 If CALLBACK returns false, the iteration ends. Otherwise, the
2838 search continues. */
2841 iterate_over_symbols (const struct block *block,
2842 const lookup_name_info &name,
2843 const domain_enum domain,
2844 gdb::function_view<symbol_found_callback_ftype> callback)
2846 struct block_iterator iter;
2849 ALL_BLOCK_SYMBOLS_WITH_NAME (block, name, iter, sym)
2851 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2852 SYMBOL_DOMAIN (sym), domain))
2854 struct block_symbol block_sym = {sym, block};
2856 if (!callback (&block_sym))
2862 /* Find the compunit symtab associated with PC and SECTION.
2863 This will read in debug info as necessary. */
2865 struct compunit_symtab *
2866 find_pc_sect_compunit_symtab (CORE_ADDR pc, struct obj_section *section)
2868 struct compunit_symtab *best_cust = NULL;
2869 CORE_ADDR distance = 0;
2870 struct bound_minimal_symbol msymbol;
2872 /* If we know that this is not a text address, return failure. This is
2873 necessary because we loop based on the block's high and low code
2874 addresses, which do not include the data ranges, and because
2875 we call find_pc_sect_psymtab which has a similar restriction based
2876 on the partial_symtab's texthigh and textlow. */
2877 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
2878 if (msymbol.minsym && msymbol.minsym->data_p ())
2881 /* Search all symtabs for the one whose file contains our address, and which
2882 is the smallest of all the ones containing the address. This is designed
2883 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2884 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2885 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2887 This happens for native ecoff format, where code from included files
2888 gets its own symtab. The symtab for the included file should have
2889 been read in already via the dependency mechanism.
2890 It might be swifter to create several symtabs with the same name
2891 like xcoff does (I'm not sure).
2893 It also happens for objfiles that have their functions reordered.
2894 For these, the symtab we are looking for is not necessarily read in. */
2896 for (objfile *obj_file : current_program_space->objfiles ())
2898 for (compunit_symtab *cust : obj_file->compunits ())
2900 const struct block *b;
2901 const struct blockvector *bv;
2903 bv = COMPUNIT_BLOCKVECTOR (cust);
2904 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2906 if (BLOCK_START (b) <= pc
2907 && BLOCK_END (b) > pc
2909 || BLOCK_END (b) - BLOCK_START (b) < distance))
2911 /* For an objfile that has its functions reordered,
2912 find_pc_psymtab will find the proper partial symbol table
2913 and we simply return its corresponding symtab. */
2914 /* In order to better support objfiles that contain both
2915 stabs and coff debugging info, we continue on if a psymtab
2917 if ((obj_file->flags & OBJF_REORDERED) && obj_file->sf)
2919 struct compunit_symtab *result;
2922 = obj_file->sf->qf->find_pc_sect_compunit_symtab (obj_file,
2932 struct block_iterator iter;
2933 struct symbol *sym = NULL;
2935 ALL_BLOCK_SYMBOLS (b, iter, sym)
2937 fixup_symbol_section (sym, obj_file);
2938 if (matching_obj_sections (SYMBOL_OBJ_SECTION (obj_file,
2944 continue; /* No symbol in this symtab matches
2947 distance = BLOCK_END (b) - BLOCK_START (b);
2953 if (best_cust != NULL)
2956 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2958 for (objfile *objf : current_program_space->objfiles ())
2960 struct compunit_symtab *result;
2964 result = objf->sf->qf->find_pc_sect_compunit_symtab (objf,
2975 /* Find the compunit symtab associated with PC.
2976 This will read in debug info as necessary.
2977 Backward compatibility, no section. */
2979 struct compunit_symtab *
2980 find_pc_compunit_symtab (CORE_ADDR pc)
2982 return find_pc_sect_compunit_symtab (pc, find_pc_mapped_section (pc));
2988 find_symbol_at_address (CORE_ADDR address)
2990 for (objfile *objfile : current_program_space->objfiles ())
2992 if (objfile->sf == NULL
2993 || objfile->sf->qf->find_compunit_symtab_by_address == NULL)
2996 struct compunit_symtab *symtab
2997 = objfile->sf->qf->find_compunit_symtab_by_address (objfile, address);
3000 const struct blockvector *bv = COMPUNIT_BLOCKVECTOR (symtab);
3002 for (int i = GLOBAL_BLOCK; i <= STATIC_BLOCK; ++i)
3004 const struct block *b = BLOCKVECTOR_BLOCK (bv, i);
3005 struct block_iterator iter;
3008 ALL_BLOCK_SYMBOLS (b, iter, sym)
3010 if (SYMBOL_CLASS (sym) == LOC_STATIC
3011 && SYMBOL_VALUE_ADDRESS (sym) == address)
3023 /* Find the source file and line number for a given PC value and SECTION.
3024 Return a structure containing a symtab pointer, a line number,
3025 and a pc range for the entire source line.
3026 The value's .pc field is NOT the specified pc.
3027 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3028 use the line that ends there. Otherwise, in that case, the line
3029 that begins there is used. */
3031 /* The big complication here is that a line may start in one file, and end just
3032 before the start of another file. This usually occurs when you #include
3033 code in the middle of a subroutine. To properly find the end of a line's PC
3034 range, we must search all symtabs associated with this compilation unit, and
3035 find the one whose first PC is closer than that of the next line in this
3038 struct symtab_and_line
3039 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
3041 struct compunit_symtab *cust;
3042 struct linetable *l;
3044 struct linetable_entry *item;
3045 const struct blockvector *bv;
3046 struct bound_minimal_symbol msymbol;
3048 /* Info on best line seen so far, and where it starts, and its file. */
3050 struct linetable_entry *best = NULL;
3051 CORE_ADDR best_end = 0;
3052 struct symtab *best_symtab = 0;
3054 /* Store here the first line number
3055 of a file which contains the line at the smallest pc after PC.
3056 If we don't find a line whose range contains PC,
3057 we will use a line one less than this,
3058 with a range from the start of that file to the first line's pc. */
3059 struct linetable_entry *alt = NULL;
3061 /* Info on best line seen in this file. */
3063 struct linetable_entry *prev;
3065 /* If this pc is not from the current frame,
3066 it is the address of the end of a call instruction.
3067 Quite likely that is the start of the following statement.
3068 But what we want is the statement containing the instruction.
3069 Fudge the pc to make sure we get that. */
3071 /* It's tempting to assume that, if we can't find debugging info for
3072 any function enclosing PC, that we shouldn't search for line
3073 number info, either. However, GAS can emit line number info for
3074 assembly files --- very helpful when debugging hand-written
3075 assembly code. In such a case, we'd have no debug info for the
3076 function, but we would have line info. */
3081 /* elz: added this because this function returned the wrong
3082 information if the pc belongs to a stub (import/export)
3083 to call a shlib function. This stub would be anywhere between
3084 two functions in the target, and the line info was erroneously
3085 taken to be the one of the line before the pc. */
3087 /* RT: Further explanation:
3089 * We have stubs (trampolines) inserted between procedures.
3091 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3092 * exists in the main image.
3094 * In the minimal symbol table, we have a bunch of symbols
3095 * sorted by start address. The stubs are marked as "trampoline",
3096 * the others appear as text. E.g.:
3098 * Minimal symbol table for main image
3099 * main: code for main (text symbol)
3100 * shr1: stub (trampoline symbol)
3101 * foo: code for foo (text symbol)
3103 * Minimal symbol table for "shr1" image:
3105 * shr1: code for shr1 (text symbol)
3108 * So the code below is trying to detect if we are in the stub
3109 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3110 * and if found, do the symbolization from the real-code address
3111 * rather than the stub address.
3113 * Assumptions being made about the minimal symbol table:
3114 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3115 * if we're really in the trampoline.s If we're beyond it (say
3116 * we're in "foo" in the above example), it'll have a closer
3117 * symbol (the "foo" text symbol for example) and will not
3118 * return the trampoline.
3119 * 2. lookup_minimal_symbol_text() will find a real text symbol
3120 * corresponding to the trampoline, and whose address will
3121 * be different than the trampoline address. I put in a sanity
3122 * check for the address being the same, to avoid an
3123 * infinite recursion.
3125 msymbol = lookup_minimal_symbol_by_pc (pc);
3126 if (msymbol.minsym != NULL)
3127 if (MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline)
3129 struct bound_minimal_symbol mfunsym
3130 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol.minsym),
3133 if (mfunsym.minsym == NULL)
3134 /* I eliminated this warning since it is coming out
3135 * in the following situation:
3136 * gdb shmain // test program with shared libraries
3137 * (gdb) break shr1 // function in shared lib
3138 * Warning: In stub for ...
3139 * In the above situation, the shared lib is not loaded yet,
3140 * so of course we can't find the real func/line info,
3141 * but the "break" still works, and the warning is annoying.
3142 * So I commented out the warning. RT */
3143 /* warning ("In stub for %s; unable to find real function/line info",
3144 SYMBOL_LINKAGE_NAME (msymbol)); */
3147 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym)
3148 == BMSYMBOL_VALUE_ADDRESS (msymbol))
3149 /* Avoid infinite recursion */
3150 /* See above comment about why warning is commented out. */
3151 /* warning ("In stub for %s; unable to find real function/line info",
3152 SYMBOL_LINKAGE_NAME (msymbol)); */
3156 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym), 0);
3159 symtab_and_line val;
3160 val.pspace = current_program_space;
3162 cust = find_pc_sect_compunit_symtab (pc, section);
3165 /* If no symbol information, return previous pc. */
3172 bv = COMPUNIT_BLOCKVECTOR (cust);
3174 /* Look at all the symtabs that share this blockvector.
3175 They all have the same apriori range, that we found was right;
3176 but they have different line tables. */
3178 for (symtab *iter_s : compunit_filetabs (cust))
3180 /* Find the best line in this symtab. */
3181 l = SYMTAB_LINETABLE (iter_s);
3187 /* I think len can be zero if the symtab lacks line numbers
3188 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3189 I'm not sure which, and maybe it depends on the symbol
3195 item = l->item; /* Get first line info. */
3197 /* Is this file's first line closer than the first lines of other files?
3198 If so, record this file, and its first line, as best alternate. */
3199 if (item->pc > pc && (!alt || item->pc < alt->pc))
3202 auto pc_compare = [](const CORE_ADDR & comp_pc,
3203 const struct linetable_entry & lhs)->bool
3205 return comp_pc < lhs.pc;
3208 struct linetable_entry *first = item;
3209 struct linetable_entry *last = item + len;
3210 item = std::upper_bound (first, last, pc, pc_compare);
3212 prev = item - 1; /* Found a matching item. */
3214 /* At this point, prev points at the line whose start addr is <= pc, and
3215 item points at the next line. If we ran off the end of the linetable
3216 (pc >= start of the last line), then prev == item. If pc < start of
3217 the first line, prev will not be set. */
3219 /* Is this file's best line closer than the best in the other files?
3220 If so, record this file, and its best line, as best so far. Don't
3221 save prev if it represents the end of a function (i.e. line number
3222 0) instead of a real line. */
3224 if (prev && prev->line && (!best || prev->pc > best->pc))
3227 best_symtab = iter_s;
3229 /* Discard BEST_END if it's before the PC of the current BEST. */
3230 if (best_end <= best->pc)
3234 /* If another line (denoted by ITEM) is in the linetable and its
3235 PC is after BEST's PC, but before the current BEST_END, then
3236 use ITEM's PC as the new best_end. */
3237 if (best && item < last && item->pc > best->pc
3238 && (best_end == 0 || best_end > item->pc))
3239 best_end = item->pc;
3244 /* If we didn't find any line number info, just return zeros.
3245 We used to return alt->line - 1 here, but that could be
3246 anywhere; if we don't have line number info for this PC,
3247 don't make some up. */
3250 else if (best->line == 0)
3252 /* If our best fit is in a range of PC's for which no line
3253 number info is available (line number is zero) then we didn't
3254 find any valid line information. */
3259 val.symtab = best_symtab;
3260 val.line = best->line;
3262 if (best_end && (!alt || best_end < alt->pc))
3267 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
3269 val.section = section;
3273 /* Backward compatibility (no section). */
3275 struct symtab_and_line
3276 find_pc_line (CORE_ADDR pc, int notcurrent)
3278 struct obj_section *section;
3280 section = find_pc_overlay (pc);
3281 if (pc_in_unmapped_range (pc, section))
3282 pc = overlay_mapped_address (pc, section);
3283 return find_pc_sect_line (pc, section, notcurrent);
3289 find_pc_line_symtab (CORE_ADDR pc)
3291 struct symtab_and_line sal;
3293 /* This always passes zero for NOTCURRENT to find_pc_line.
3294 There are currently no callers that ever pass non-zero. */
3295 sal = find_pc_line (pc, 0);
3299 /* Find line number LINE in any symtab whose name is the same as
3302 If found, return the symtab that contains the linetable in which it was
3303 found, set *INDEX to the index in the linetable of the best entry
3304 found, and set *EXACT_MATCH nonzero if the value returned is an
3307 If not found, return NULL. */
3310 find_line_symtab (struct symtab *sym_tab, int line,
3311 int *index, int *exact_match)
3313 int exact = 0; /* Initialized here to avoid a compiler warning. */
3315 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3319 struct linetable *best_linetable;
3320 struct symtab *best_symtab;
3322 /* First try looking it up in the given symtab. */
3323 best_linetable = SYMTAB_LINETABLE (sym_tab);
3324 best_symtab = sym_tab;
3325 best_index = find_line_common (best_linetable, line, &exact, 0);
3326 if (best_index < 0 || !exact)
3328 /* Didn't find an exact match. So we better keep looking for
3329 another symtab with the same name. In the case of xcoff,
3330 multiple csects for one source file (produced by IBM's FORTRAN
3331 compiler) produce multiple symtabs (this is unavoidable
3332 assuming csects can be at arbitrary places in memory and that
3333 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3335 /* BEST is the smallest linenumber > LINE so far seen,
3336 or 0 if none has been seen so far.
3337 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3340 if (best_index >= 0)
3341 best = best_linetable->item[best_index].line;
3345 for (objfile *objfile : current_program_space->objfiles ())
3348 objfile->sf->qf->expand_symtabs_with_fullname
3349 (objfile, symtab_to_fullname (sym_tab));
3352 for (objfile *objfile : current_program_space->objfiles ())
3354 for (compunit_symtab *cu : objfile->compunits ())
3356 for (symtab *s : compunit_filetabs (cu))
3358 struct linetable *l;
3361 if (FILENAME_CMP (sym_tab->filename, s->filename) != 0)
3363 if (FILENAME_CMP (symtab_to_fullname (sym_tab),
3364 symtab_to_fullname (s)) != 0)
3366 l = SYMTAB_LINETABLE (s);
3367 ind = find_line_common (l, line, &exact, 0);
3377 if (best == 0 || l->item[ind].line < best)
3379 best = l->item[ind].line;
3394 *index = best_index;
3396 *exact_match = exact;
3401 /* Given SYMTAB, returns all the PCs function in the symtab that
3402 exactly match LINE. Returns an empty vector if there are no exact
3403 matches, but updates BEST_ITEM in this case. */
3405 std::vector<CORE_ADDR>
3406 find_pcs_for_symtab_line (struct symtab *symtab, int line,
3407 struct linetable_entry **best_item)
3410 std::vector<CORE_ADDR> result;
3412 /* First, collect all the PCs that are at this line. */
3418 idx = find_line_common (SYMTAB_LINETABLE (symtab), line, &was_exact,
3425 struct linetable_entry *item = &SYMTAB_LINETABLE (symtab)->item[idx];
3427 if (*best_item == NULL || item->line < (*best_item)->line)
3433 result.push_back (SYMTAB_LINETABLE (symtab)->item[idx].pc);
3441 /* Set the PC value for a given source file and line number and return true.
3442 Returns zero for invalid line number (and sets the PC to 0).
3443 The source file is specified with a struct symtab. */
3446 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
3448 struct linetable *l;
3455 symtab = find_line_symtab (symtab, line, &ind, NULL);
3458 l = SYMTAB_LINETABLE (symtab);
3459 *pc = l->item[ind].pc;
3466 /* Find the range of pc values in a line.
3467 Store the starting pc of the line into *STARTPTR
3468 and the ending pc (start of next line) into *ENDPTR.
3469 Returns 1 to indicate success.
3470 Returns 0 if could not find the specified line. */
3473 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
3476 CORE_ADDR startaddr;
3477 struct symtab_and_line found_sal;
3480 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
3483 /* This whole function is based on address. For example, if line 10 has
3484 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3485 "info line *0x123" should say the line goes from 0x100 to 0x200
3486 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3487 This also insures that we never give a range like "starts at 0x134
3488 and ends at 0x12c". */
3490 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
3491 if (found_sal.line != sal.line)
3493 /* The specified line (sal) has zero bytes. */
3494 *startptr = found_sal.pc;
3495 *endptr = found_sal.pc;
3499 *startptr = found_sal.pc;
3500 *endptr = found_sal.end;
3505 /* Given a line table and a line number, return the index into the line
3506 table for the pc of the nearest line whose number is >= the specified one.
3507 Return -1 if none is found. The value is >= 0 if it is an index.
3508 START is the index at which to start searching the line table.
3510 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3513 find_line_common (struct linetable *l, int lineno,
3514 int *exact_match, int start)
3519 /* BEST is the smallest linenumber > LINENO so far seen,
3520 or 0 if none has been seen so far.
3521 BEST_INDEX identifies the item for it. */
3523 int best_index = -1;
3534 for (i = start; i < len; i++)
3536 struct linetable_entry *item = &(l->item[i]);
3538 if (item->line == lineno)
3540 /* Return the first (lowest address) entry which matches. */
3545 if (item->line > lineno && (best == 0 || item->line < best))
3552 /* If we got here, we didn't get an exact match. */
3557 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
3559 struct symtab_and_line sal;
3561 sal = find_pc_line (pc, 0);
3564 return sal.symtab != 0;
3567 /* Helper for find_function_start_sal. Does most of the work, except
3568 setting the sal's symbol. */
3570 static symtab_and_line
3571 find_function_start_sal_1 (CORE_ADDR func_addr, obj_section *section,
3574 symtab_and_line sal = find_pc_sect_line (func_addr, section, 0);
3576 if (funfirstline && sal.symtab != NULL
3577 && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal.symtab))
3578 || SYMTAB_LANGUAGE (sal.symtab) == language_asm))
3580 struct gdbarch *gdbarch = get_objfile_arch (SYMTAB_OBJFILE (sal.symtab));
3583 if (gdbarch_skip_entrypoint_p (gdbarch))
3584 sal.pc = gdbarch_skip_entrypoint (gdbarch, sal.pc);
3588 /* We always should have a line for the function start address.
3589 If we don't, something is odd. Create a plain SAL referring
3590 just the PC and hope that skip_prologue_sal (if requested)
3591 can find a line number for after the prologue. */
3592 if (sal.pc < func_addr)
3595 sal.pspace = current_program_space;
3597 sal.section = section;
3601 skip_prologue_sal (&sal);
3609 find_function_start_sal (CORE_ADDR func_addr, obj_section *section,
3613 = find_function_start_sal_1 (func_addr, section, funfirstline);
3615 /* find_function_start_sal_1 does a linetable search, so it finds
3616 the symtab and linenumber, but not a symbol. Fill in the
3617 function symbol too. */
3618 sal.symbol = find_pc_sect_containing_function (sal.pc, sal.section);
3626 find_function_start_sal (symbol *sym, bool funfirstline)
3628 fixup_symbol_section (sym, NULL);
3630 = find_function_start_sal_1 (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)),
3631 SYMBOL_OBJ_SECTION (symbol_objfile (sym), sym),
3638 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3639 address for that function that has an entry in SYMTAB's line info
3640 table. If such an entry cannot be found, return FUNC_ADDR
3644 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
3646 CORE_ADDR func_start, func_end;
3647 struct linetable *l;
3650 /* Give up if this symbol has no lineinfo table. */
3651 l = SYMTAB_LINETABLE (symtab);
3655 /* Get the range for the function's PC values, or give up if we
3656 cannot, for some reason. */
3657 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
3660 /* Linetable entries are ordered by PC values, see the commentary in
3661 symtab.h where `struct linetable' is defined. Thus, the first
3662 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3663 address we are looking for. */
3664 for (i = 0; i < l->nitems; i++)
3666 struct linetable_entry *item = &(l->item[i]);
3668 /* Don't use line numbers of zero, they mark special entries in
3669 the table. See the commentary on symtab.h before the
3670 definition of struct linetable. */
3671 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
3678 /* Adjust SAL to the first instruction past the function prologue.
3679 If the PC was explicitly specified, the SAL is not changed.
3680 If the line number was explicitly specified then the SAL can still be
3681 updated, unless the language for SAL is assembler, in which case the SAL
3682 will be left unchanged.
3683 If SAL is already past the prologue, then do nothing. */
3686 skip_prologue_sal (struct symtab_and_line *sal)
3689 struct symtab_and_line start_sal;
3690 CORE_ADDR pc, saved_pc;
3691 struct obj_section *section;
3693 struct objfile *objfile;
3694 struct gdbarch *gdbarch;
3695 const struct block *b, *function_block;
3696 int force_skip, skip;
3698 /* Do not change the SAL if PC was specified explicitly. */
3699 if (sal->explicit_pc)
3702 /* In assembly code, if the user asks for a specific line then we should
3703 not adjust the SAL. The user already has instruction level
3704 visibility in this case, so selecting a line other than one requested
3705 is likely to be the wrong choice. */
3706 if (sal->symtab != nullptr
3707 && sal->explicit_line
3708 && SYMTAB_LANGUAGE (sal->symtab) == language_asm)
3711 scoped_restore_current_pspace_and_thread restore_pspace_thread;
3713 switch_to_program_space_and_thread (sal->pspace);
3715 sym = find_pc_sect_function (sal->pc, sal->section);
3718 fixup_symbol_section (sym, NULL);
3720 objfile = symbol_objfile (sym);
3721 pc = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym));
3722 section = SYMBOL_OBJ_SECTION (objfile, sym);
3723 name = SYMBOL_LINKAGE_NAME (sym);
3727 struct bound_minimal_symbol msymbol
3728 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
3730 if (msymbol.minsym == NULL)
3733 objfile = msymbol.objfile;
3734 pc = BMSYMBOL_VALUE_ADDRESS (msymbol);
3735 section = MSYMBOL_OBJ_SECTION (objfile, msymbol.minsym);
3736 name = MSYMBOL_LINKAGE_NAME (msymbol.minsym);
3739 gdbarch = get_objfile_arch (objfile);
3741 /* Process the prologue in two passes. In the first pass try to skip the
3742 prologue (SKIP is true) and verify there is a real need for it (indicated
3743 by FORCE_SKIP). If no such reason was found run a second pass where the
3744 prologue is not skipped (SKIP is false). */
3749 /* Be conservative - allow direct PC (without skipping prologue) only if we
3750 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3751 have to be set by the caller so we use SYM instead. */
3753 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym))))
3761 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3762 so that gdbarch_skip_prologue has something unique to work on. */
3763 if (section_is_overlay (section) && !section_is_mapped (section))
3764 pc = overlay_unmapped_address (pc, section);
3766 /* Skip "first line" of function (which is actually its prologue). */
3767 pc += gdbarch_deprecated_function_start_offset (gdbarch);
3768 if (gdbarch_skip_entrypoint_p (gdbarch))
3769 pc = gdbarch_skip_entrypoint (gdbarch, pc);
3771 pc = gdbarch_skip_prologue_noexcept (gdbarch, pc);
3773 /* For overlays, map pc back into its mapped VMA range. */
3774 pc = overlay_mapped_address (pc, section);
3776 /* Calculate line number. */
3777 start_sal = find_pc_sect_line (pc, section, 0);
3779 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3780 line is still part of the same function. */
3781 if (skip && start_sal.pc != pc
3782 && (sym ? (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
3783 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
3784 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section).minsym
3785 == lookup_minimal_symbol_by_pc_section (pc, section).minsym)))
3787 /* First pc of next line */
3789 /* Recalculate the line number (might not be N+1). */
3790 start_sal = find_pc_sect_line (pc, section, 0);
3793 /* On targets with executable formats that don't have a concept of
3794 constructors (ELF with .init has, PE doesn't), gcc emits a call
3795 to `__main' in `main' between the prologue and before user
3797 if (gdbarch_skip_main_prologue_p (gdbarch)
3798 && name && strcmp_iw (name, "main") == 0)
3800 pc = gdbarch_skip_main_prologue (gdbarch, pc);
3801 /* Recalculate the line number (might not be N+1). */
3802 start_sal = find_pc_sect_line (pc, section, 0);
3806 while (!force_skip && skip--);
3808 /* If we still don't have a valid source line, try to find the first
3809 PC in the lineinfo table that belongs to the same function. This
3810 happens with COFF debug info, which does not seem to have an
3811 entry in lineinfo table for the code after the prologue which has
3812 no direct relation to source. For example, this was found to be
3813 the case with the DJGPP target using "gcc -gcoff" when the
3814 compiler inserted code after the prologue to make sure the stack
3816 if (!force_skip && sym && start_sal.symtab == NULL)
3818 pc = skip_prologue_using_lineinfo (pc, symbol_symtab (sym));
3819 /* Recalculate the line number. */
3820 start_sal = find_pc_sect_line (pc, section, 0);
3823 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3824 forward SAL to the end of the prologue. */
3829 sal->section = section;
3830 sal->symtab = start_sal.symtab;
3831 sal->line = start_sal.line;
3832 sal->end = start_sal.end;
3834 /* Check if we are now inside an inlined function. If we can,
3835 use the call site of the function instead. */
3836 b = block_for_pc_sect (sal->pc, sal->section);
3837 function_block = NULL;
3840 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
3842 else if (BLOCK_FUNCTION (b) != NULL)
3844 b = BLOCK_SUPERBLOCK (b);
3846 if (function_block != NULL
3847 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
3849 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
3850 sal->symtab = symbol_symtab (BLOCK_FUNCTION (function_block));
3854 /* Given PC at the function's start address, attempt to find the
3855 prologue end using SAL information. Return zero if the skip fails.
3857 A non-optimized prologue traditionally has one SAL for the function
3858 and a second for the function body. A single line function has
3859 them both pointing at the same line.
3861 An optimized prologue is similar but the prologue may contain
3862 instructions (SALs) from the instruction body. Need to skip those
3863 while not getting into the function body.
3865 The functions end point and an increasing SAL line are used as
3866 indicators of the prologue's endpoint.
3868 This code is based on the function refine_prologue_limit
3872 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
3874 struct symtab_and_line prologue_sal;
3877 const struct block *bl;
3879 /* Get an initial range for the function. */
3880 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
3881 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
3883 prologue_sal = find_pc_line (start_pc, 0);
3884 if (prologue_sal.line != 0)
3886 /* For languages other than assembly, treat two consecutive line
3887 entries at the same address as a zero-instruction prologue.
3888 The GNU assembler emits separate line notes for each instruction
3889 in a multi-instruction macro, but compilers generally will not
3891 if (prologue_sal.symtab->language != language_asm)
3893 struct linetable *linetable = SYMTAB_LINETABLE (prologue_sal.symtab);
3896 /* Skip any earlier lines, and any end-of-sequence marker
3897 from a previous function. */
3898 while (linetable->item[idx].pc != prologue_sal.pc
3899 || linetable->item[idx].line == 0)
3902 if (idx+1 < linetable->nitems
3903 && linetable->item[idx+1].line != 0
3904 && linetable->item[idx+1].pc == start_pc)
3908 /* If there is only one sal that covers the entire function,
3909 then it is probably a single line function, like
3911 if (prologue_sal.end >= end_pc)
3914 while (prologue_sal.end < end_pc)
3916 struct symtab_and_line sal;
3918 sal = find_pc_line (prologue_sal.end, 0);
3921 /* Assume that a consecutive SAL for the same (or larger)
3922 line mark the prologue -> body transition. */
3923 if (sal.line >= prologue_sal.line)
3925 /* Likewise if we are in a different symtab altogether
3926 (e.g. within a file included via #include). */
3927 if (sal.symtab != prologue_sal.symtab)
3930 /* The line number is smaller. Check that it's from the
3931 same function, not something inlined. If it's inlined,
3932 then there is no point comparing the line numbers. */
3933 bl = block_for_pc (prologue_sal.end);
3936 if (block_inlined_p (bl))
3938 if (BLOCK_FUNCTION (bl))
3943 bl = BLOCK_SUPERBLOCK (bl);
3948 /* The case in which compiler's optimizer/scheduler has
3949 moved instructions into the prologue. We look ahead in
3950 the function looking for address ranges whose
3951 corresponding line number is less the first one that we
3952 found for the function. This is more conservative then
3953 refine_prologue_limit which scans a large number of SALs
3954 looking for any in the prologue. */
3959 if (prologue_sal.end < end_pc)
3960 /* Return the end of this line, or zero if we could not find a
3962 return prologue_sal.end;
3964 /* Don't return END_PC, which is past the end of the function. */
3965 return prologue_sal.pc;
3971 find_function_alias_target (bound_minimal_symbol msymbol)
3973 CORE_ADDR func_addr;
3974 if (!msymbol_is_function (msymbol.objfile, msymbol.minsym, &func_addr))
3977 symbol *sym = find_pc_function (func_addr);
3979 && SYMBOL_CLASS (sym) == LOC_BLOCK
3980 && BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym)) == func_addr)
3987 /* If P is of the form "operator[ \t]+..." where `...' is
3988 some legitimate operator text, return a pointer to the
3989 beginning of the substring of the operator text.
3990 Otherwise, return "". */
3993 operator_chars (const char *p, const char **end)
3996 if (!startswith (p, CP_OPERATOR_STR))
3998 p += CP_OPERATOR_LEN;
4000 /* Don't get faked out by `operator' being part of a longer
4002 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
4005 /* Allow some whitespace between `operator' and the operator symbol. */
4006 while (*p == ' ' || *p == '\t')
4009 /* Recognize 'operator TYPENAME'. */
4011 if (isalpha (*p) || *p == '_' || *p == '$')
4013 const char *q = p + 1;
4015 while (isalnum (*q) || *q == '_' || *q == '$')
4024 case '\\': /* regexp quoting */
4027 if (p[2] == '=') /* 'operator\*=' */
4029 else /* 'operator\*' */
4033 else if (p[1] == '[')
4036 error (_("mismatched quoting on brackets, "
4037 "try 'operator\\[\\]'"));
4038 else if (p[2] == '\\' && p[3] == ']')
4040 *end = p + 4; /* 'operator\[\]' */
4044 error (_("nothing is allowed between '[' and ']'"));
4048 /* Gratuitous qoute: skip it and move on. */
4070 if (p[0] == '-' && p[1] == '>')
4072 /* Struct pointer member operator 'operator->'. */
4075 *end = p + 3; /* 'operator->*' */
4078 else if (p[2] == '\\')
4080 *end = p + 4; /* Hopefully 'operator->\*' */
4085 *end = p + 2; /* 'operator->' */
4089 if (p[1] == '=' || p[1] == p[0])
4100 error (_("`operator ()' must be specified "
4101 "without whitespace in `()'"));
4106 error (_("`operator ?:' must be specified "
4107 "without whitespace in `?:'"));
4112 error (_("`operator []' must be specified "
4113 "without whitespace in `[]'"));
4117 error (_("`operator %s' not supported"), p);
4126 /* Data structure to maintain printing state for output_source_filename. */
4128 struct output_source_filename_data
4130 /* Cache of what we've seen so far. */
4131 struct filename_seen_cache *filename_seen_cache;
4133 /* Flag of whether we're printing the first one. */
4137 /* Slave routine for sources_info. Force line breaks at ,'s.
4138 NAME is the name to print.
4139 DATA contains the state for printing and watching for duplicates. */
4142 output_source_filename (const char *name,
4143 struct output_source_filename_data *data)
4145 /* Since a single source file can result in several partial symbol
4146 tables, we need to avoid printing it more than once. Note: if
4147 some of the psymtabs are read in and some are not, it gets
4148 printed both under "Source files for which symbols have been
4149 read" and "Source files for which symbols will be read in on
4150 demand". I consider this a reasonable way to deal with the
4151 situation. I'm not sure whether this can also happen for
4152 symtabs; it doesn't hurt to check. */
4154 /* Was NAME already seen? */
4155 if (data->filename_seen_cache->seen (name))
4157 /* Yes; don't print it again. */
4161 /* No; print it and reset *FIRST. */
4163 printf_filtered (", ");
4167 fputs_styled (name, file_name_style.style (), gdb_stdout);
4170 /* A callback for map_partial_symbol_filenames. */
4173 output_partial_symbol_filename (const char *filename, const char *fullname,
4176 output_source_filename (fullname ? fullname : filename,
4177 (struct output_source_filename_data *) data);
4181 info_sources_command (const char *ignore, int from_tty)
4183 struct output_source_filename_data data;
4185 if (!have_full_symbols () && !have_partial_symbols ())
4187 error (_("No symbol table is loaded. Use the \"file\" command."));
4190 filename_seen_cache filenames_seen;
4192 data.filename_seen_cache = &filenames_seen;
4194 printf_filtered ("Source files for which symbols have been read in:\n\n");
4197 for (objfile *objfile : current_program_space->objfiles ())
4199 for (compunit_symtab *cu : objfile->compunits ())
4201 for (symtab *s : compunit_filetabs (cu))
4203 const char *fullname = symtab_to_fullname (s);
4205 output_source_filename (fullname, &data);
4209 printf_filtered ("\n\n");
4211 printf_filtered ("Source files for which symbols "
4212 "will be read in on demand:\n\n");
4214 filenames_seen.clear ();
4216 map_symbol_filenames (output_partial_symbol_filename, &data,
4217 1 /*need_fullname*/);
4218 printf_filtered ("\n");
4221 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4222 non-zero compare only lbasename of FILES. */
4225 file_matches (const char *file, const char *files[], int nfiles, int basenames)
4229 if (file != NULL && nfiles != 0)
4231 for (i = 0; i < nfiles; i++)
4233 if (compare_filenames_for_search (file, (basenames
4234 ? lbasename (files[i])
4239 else if (nfiles == 0)
4244 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4245 sort symbols, not minimal symbols. */
4248 symbol_search::compare_search_syms (const symbol_search &sym_a,
4249 const symbol_search &sym_b)
4253 c = FILENAME_CMP (symbol_symtab (sym_a.symbol)->filename,
4254 symbol_symtab (sym_b.symbol)->filename);
4258 if (sym_a.block != sym_b.block)
4259 return sym_a.block - sym_b.block;
4261 return strcmp (SYMBOL_PRINT_NAME (sym_a.symbol),
4262 SYMBOL_PRINT_NAME (sym_b.symbol));
4265 /* Returns true if the type_name of symbol_type of SYM matches TREG.
4266 If SYM has no symbol_type or symbol_name, returns false. */
4269 treg_matches_sym_type_name (const compiled_regex &treg,
4270 const struct symbol *sym)
4272 struct type *sym_type;
4273 std::string printed_sym_type_name;
4275 if (symbol_lookup_debug > 1)
4277 fprintf_unfiltered (gdb_stdlog,
4278 "treg_matches_sym_type_name\n sym %s\n",
4279 SYMBOL_NATURAL_NAME (sym));
4282 sym_type = SYMBOL_TYPE (sym);
4283 if (sym_type == NULL)
4287 scoped_switch_to_sym_language_if_auto l (sym);
4289 printed_sym_type_name = type_to_string (sym_type);
4293 if (symbol_lookup_debug > 1)
4295 fprintf_unfiltered (gdb_stdlog,
4296 " sym_type_name %s\n",
4297 printed_sym_type_name.c_str ());
4301 if (printed_sym_type_name.empty ())
4304 return treg.exec (printed_sym_type_name.c_str (), 0, NULL, 0) == 0;
4308 /* Sort the symbols in RESULT and remove duplicates. */
4311 sort_search_symbols_remove_dups (std::vector<symbol_search> *result)
4313 std::sort (result->begin (), result->end ());
4314 result->erase (std::unique (result->begin (), result->end ()),
4318 /* Search the symbol table for matches to the regular expression REGEXP,
4319 returning the results.
4321 Only symbols of KIND are searched:
4322 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4323 and constants (enums).
4324 if T_REGEXP is not NULL, only returns var that have
4325 a type matching regular expression T_REGEXP.
4326 FUNCTIONS_DOMAIN - search all functions
4327 TYPES_DOMAIN - search all type names
4328 ALL_DOMAIN - an internal error for this function
4330 Within each file the results are sorted locally; each symtab's global and
4331 static blocks are separately alphabetized.
4332 Duplicate entries are removed. */
4334 std::vector<symbol_search>
4335 search_symbols (const char *regexp, enum search_domain kind,
4336 const char *t_regexp,
4337 int nfiles, const char *files[])
4339 const struct blockvector *bv;
4340 const struct block *b;
4342 struct block_iterator iter;
4345 static const enum minimal_symbol_type types[]
4346 = {mst_data, mst_text, mst_unknown};
4347 static const enum minimal_symbol_type types2[]
4348 = {mst_bss, mst_file_text, mst_unknown};
4349 static const enum minimal_symbol_type types3[]
4350 = {mst_file_data, mst_solib_trampoline, mst_unknown};
4351 static const enum minimal_symbol_type types4[]
4352 = {mst_file_bss, mst_text_gnu_ifunc, mst_unknown};
4353 enum minimal_symbol_type ourtype;
4354 enum minimal_symbol_type ourtype2;
4355 enum minimal_symbol_type ourtype3;
4356 enum minimal_symbol_type ourtype4;
4357 std::vector<symbol_search> result;
4358 gdb::optional<compiled_regex> preg;
4359 gdb::optional<compiled_regex> treg;
4361 gdb_assert (kind <= TYPES_DOMAIN);
4363 ourtype = types[kind];
4364 ourtype2 = types2[kind];
4365 ourtype3 = types3[kind];
4366 ourtype4 = types4[kind];
4370 /* Make sure spacing is right for C++ operators.
4371 This is just a courtesy to make the matching less sensitive
4372 to how many spaces the user leaves between 'operator'
4373 and <TYPENAME> or <OPERATOR>. */
4375 const char *opname = operator_chars (regexp, &opend);
4379 int fix = -1; /* -1 means ok; otherwise number of
4382 if (isalpha (*opname) || *opname == '_' || *opname == '$')
4384 /* There should 1 space between 'operator' and 'TYPENAME'. */
4385 if (opname[-1] != ' ' || opname[-2] == ' ')
4390 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4391 if (opname[-1] == ' ')
4394 /* If wrong number of spaces, fix it. */
4397 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
4399 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
4404 int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off
4406 preg.emplace (regexp, cflags, _("Invalid regexp"));
4409 if (t_regexp != NULL)
4411 int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off
4413 treg.emplace (t_regexp, cflags, _("Invalid regexp"));
4416 /* Search through the partial symtabs *first* for all symbols
4417 matching the regexp. That way we don't have to reproduce all of
4418 the machinery below. */
4419 expand_symtabs_matching ([&] (const char *filename, bool basenames)
4421 return file_matches (filename, files, nfiles,
4424 lookup_name_info::match_any (),
4425 [&] (const char *symname)
4427 return (!preg.has_value ()
4428 || preg->exec (symname,
4434 /* Here, we search through the minimal symbol tables for functions
4435 and variables that match, and force their symbols to be read.
4436 This is in particular necessary for demangled variable names,
4437 which are no longer put into the partial symbol tables.
4438 The symbol will then be found during the scan of symtabs below.
4440 For functions, find_pc_symtab should succeed if we have debug info
4441 for the function, for variables we have to call
4442 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4444 If the lookup fails, set found_misc so that we will rescan to print
4445 any matching symbols without debug info.
4446 We only search the objfile the msymbol came from, we no longer search
4447 all objfiles. In large programs (1000s of shared libs) searching all
4448 objfiles is not worth the pain. */
4450 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
4452 for (objfile *objfile : current_program_space->objfiles ())
4454 for (minimal_symbol *msymbol : objfile->msymbols ())
4458 if (msymbol->created_by_gdb)
4461 if (MSYMBOL_TYPE (msymbol) == ourtype
4462 || MSYMBOL_TYPE (msymbol) == ourtype2
4463 || MSYMBOL_TYPE (msymbol) == ourtype3
4464 || MSYMBOL_TYPE (msymbol) == ourtype4)
4466 if (!preg.has_value ()
4467 || preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
4470 /* Note: An important side-effect of these
4471 lookup functions is to expand the symbol
4472 table if msymbol is found, for the benefit of
4473 the next loop on compunits. */
4474 if (kind == FUNCTIONS_DOMAIN
4475 ? (find_pc_compunit_symtab
4476 (MSYMBOL_VALUE_ADDRESS (objfile, msymbol))
4478 : (lookup_symbol_in_objfile_from_linkage_name
4479 (objfile, MSYMBOL_LINKAGE_NAME (msymbol),
4489 for (objfile *objfile : current_program_space->objfiles ())
4491 for (compunit_symtab *cust : objfile->compunits ())
4493 bv = COMPUNIT_BLOCKVECTOR (cust);
4494 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
4496 b = BLOCKVECTOR_BLOCK (bv, i);
4497 ALL_BLOCK_SYMBOLS (b, iter, sym)
4499 struct symtab *real_symtab = symbol_symtab (sym);
4503 /* Check first sole REAL_SYMTAB->FILENAME. It does
4504 not need to be a substring of symtab_to_fullname as
4505 it may contain "./" etc. */
4506 if ((file_matches (real_symtab->filename, files, nfiles, 0)
4507 || ((basenames_may_differ
4508 || file_matches (lbasename (real_symtab->filename),
4510 && file_matches (symtab_to_fullname (real_symtab),
4512 && ((!preg.has_value ()
4513 || preg->exec (SYMBOL_NATURAL_NAME (sym), 0,
4515 && ((kind == VARIABLES_DOMAIN
4516 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
4517 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
4518 && SYMBOL_CLASS (sym) != LOC_BLOCK
4519 /* LOC_CONST can be used for more than
4520 just enums, e.g., c++ static const
4521 members. We only want to skip enums
4523 && !(SYMBOL_CLASS (sym) == LOC_CONST
4524 && (TYPE_CODE (SYMBOL_TYPE (sym))
4526 && (!treg.has_value ()
4527 || treg_matches_sym_type_name (*treg, sym)))
4528 || (kind == FUNCTIONS_DOMAIN
4529 && SYMBOL_CLASS (sym) == LOC_BLOCK
4530 && (!treg.has_value ()
4531 || treg_matches_sym_type_name (*treg,
4533 || (kind == TYPES_DOMAIN
4534 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
4537 result.emplace_back (i, sym);
4544 if (!result.empty ())
4545 sort_search_symbols_remove_dups (&result);
4547 /* If there are no eyes, avoid all contact. I mean, if there are
4548 no debug symbols, then add matching minsyms. But if the user wants
4549 to see symbols matching a type regexp, then never give a minimal symbol,
4550 as we assume that a minimal symbol does not have a type. */
4552 if ((found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
4553 && !treg.has_value ())
4555 for (objfile *objfile : current_program_space->objfiles ())
4557 for (minimal_symbol *msymbol : objfile->msymbols ())
4561 if (msymbol->created_by_gdb)
4564 if (MSYMBOL_TYPE (msymbol) == ourtype
4565 || MSYMBOL_TYPE (msymbol) == ourtype2
4566 || MSYMBOL_TYPE (msymbol) == ourtype3
4567 || MSYMBOL_TYPE (msymbol) == ourtype4)
4569 if (!preg.has_value ()
4570 || preg->exec (MSYMBOL_NATURAL_NAME (msymbol), 0,
4573 /* For functions we can do a quick check of whether the
4574 symbol might be found via find_pc_symtab. */
4575 if (kind != FUNCTIONS_DOMAIN
4576 || (find_pc_compunit_symtab
4577 (MSYMBOL_VALUE_ADDRESS (objfile, msymbol))
4580 if (lookup_symbol_in_objfile_from_linkage_name
4581 (objfile, MSYMBOL_LINKAGE_NAME (msymbol),
4586 result.emplace_back (i, msymbol, objfile);
4598 /* Helper function for symtab_symbol_info, this function uses
4599 the data returned from search_symbols() to print information
4600 regarding the match to gdb_stdout. If LAST is not NULL,
4601 print file and line number information for the symbol as
4602 well. Skip printing the filename if it matches LAST. */
4605 print_symbol_info (enum search_domain kind,
4607 int block, const char *last)
4609 scoped_switch_to_sym_language_if_auto l (sym);
4610 struct symtab *s = symbol_symtab (sym);
4614 const char *s_filename = symtab_to_filename_for_display (s);
4616 if (filename_cmp (last, s_filename) != 0)
4618 fputs_filtered ("\nFile ", gdb_stdout);
4619 fputs_styled (s_filename, file_name_style.style (), gdb_stdout);
4620 fputs_filtered (":\n", gdb_stdout);
4623 if (SYMBOL_LINE (sym) != 0)
4624 printf_filtered ("%d:\t", SYMBOL_LINE (sym));
4626 puts_filtered ("\t");
4629 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
4630 printf_filtered ("static ");
4632 /* Typedef that is not a C++ class. */
4633 if (kind == TYPES_DOMAIN
4634 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
4636 /* FIXME: For C (and C++) we end up with a difference in output here
4637 between how a typedef is printed, and non-typedefs are printed.
4638 The TYPEDEF_PRINT code places a ";" at the end in an attempt to
4639 appear C-like, while TYPE_PRINT doesn't.
4641 For the struct printing case below, things are worse, we force
4642 printing of the ";" in this function, which is going to be wrong
4643 for languages that don't require a ";" between statements. */
4644 if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_TYPEDEF)
4645 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
4648 type_print (SYMBOL_TYPE (sym), "", gdb_stdout, -1);
4649 printf_filtered ("\n");
4652 /* variable, func, or typedef-that-is-c++-class. */
4653 else if (kind < TYPES_DOMAIN
4654 || (kind == TYPES_DOMAIN
4655 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
4657 type_print (SYMBOL_TYPE (sym),
4658 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
4659 ? "" : SYMBOL_PRINT_NAME (sym)),
4662 printf_filtered (";\n");
4666 /* This help function for symtab_symbol_info() prints information
4667 for non-debugging symbols to gdb_stdout. */
4670 print_msymbol_info (struct bound_minimal_symbol msymbol)
4672 struct gdbarch *gdbarch = get_objfile_arch (msymbol.objfile);
4675 if (gdbarch_addr_bit (gdbarch) <= 32)
4676 tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol)
4677 & (CORE_ADDR) 0xffffffff,
4680 tmp = hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol),
4682 fputs_styled (tmp, address_style.style (), gdb_stdout);
4683 fputs_filtered (" ", gdb_stdout);
4684 if (msymbol.minsym->text_p ())
4685 fputs_styled (MSYMBOL_PRINT_NAME (msymbol.minsym),
4686 function_name_style.style (),
4689 fputs_filtered (MSYMBOL_PRINT_NAME (msymbol.minsym), gdb_stdout);
4690 fputs_filtered ("\n", gdb_stdout);
4693 /* This is the guts of the commands "info functions", "info types", and
4694 "info variables". It calls search_symbols to find all matches and then
4695 print_[m]symbol_info to print out some useful information about the
4699 symtab_symbol_info (bool quiet,
4700 const char *regexp, enum search_domain kind,
4701 const char *t_regexp, int from_tty)
4703 static const char * const classnames[] =
4704 {"variable", "function", "type"};
4705 const char *last_filename = "";
4708 gdb_assert (kind <= TYPES_DOMAIN);
4710 if (regexp != nullptr && *regexp == '\0')
4713 /* Must make sure that if we're interrupted, symbols gets freed. */
4714 std::vector<symbol_search> symbols = search_symbols (regexp, kind,
4721 if (t_regexp != NULL)
4723 (_("All %ss matching regular expression \"%s\""
4724 " with type matching regular expression \"%s\":\n"),
4725 classnames[kind], regexp, t_regexp);
4727 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4728 classnames[kind], regexp);
4732 if (t_regexp != NULL)
4734 (_("All defined %ss"
4735 " with type matching regular expression \"%s\" :\n"),
4736 classnames[kind], t_regexp);
4738 printf_filtered (_("All defined %ss:\n"), classnames[kind]);
4742 for (const symbol_search &p : symbols)
4746 if (p.msymbol.minsym != NULL)
4751 printf_filtered (_("\nNon-debugging symbols:\n"));
4754 print_msymbol_info (p.msymbol);
4758 print_symbol_info (kind,
4763 = symtab_to_filename_for_display (symbol_symtab (p.symbol));
4768 /* Implement the 'info variables' command. */
4771 info_variables_command (const char *args, int from_tty)
4773 info_print_options opts;
4774 extract_info_print_options (&opts, &args);
4776 symtab_symbol_info (opts.quiet, args, VARIABLES_DOMAIN,
4777 opts.type_regexp, from_tty);
4780 /* Implement the 'info functions' command. */
4783 info_functions_command (const char *args, int from_tty)
4785 info_print_options opts;
4786 extract_info_print_options (&opts, &args);
4788 symtab_symbol_info (opts.quiet, args, FUNCTIONS_DOMAIN,
4789 opts.type_regexp, from_tty);
4792 /* Holds the -q option for the 'info types' command. */
4794 struct info_types_options
4799 /* The options used by the 'info types' command. */
4801 static const gdb::option::option_def info_types_options_defs[] = {
4802 gdb::option::boolean_option_def<info_types_options> {
4804 [] (info_types_options *opt) { return &opt->quiet; },
4805 nullptr, /* show_cmd_cb */
4806 nullptr /* set_doc */
4810 /* Returns the option group used by 'info types'. */
4812 static gdb::option::option_def_group
4813 make_info_types_options_def_group (info_types_options *opts)
4815 return {{info_types_options_defs}, opts};
4818 /* Implement the 'info types' command. */
4821 info_types_command (const char *args, int from_tty)
4823 info_types_options opts;
4825 auto grp = make_info_types_options_def_group (&opts);
4826 gdb::option::process_options
4827 (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp);
4828 if (args != nullptr && *args == '\0')
4830 symtab_symbol_info (opts.quiet, args, TYPES_DOMAIN, NULL, from_tty);
4833 /* Command completer for 'info types' command. */
4836 info_types_command_completer (struct cmd_list_element *ignore,
4837 completion_tracker &tracker,
4838 const char *text, const char * /* word */)
4841 = make_info_types_options_def_group (nullptr);
4842 if (gdb::option::complete_options
4843 (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group))
4846 const char *word = advance_to_expression_complete_word_point (tracker, text);
4847 symbol_completer (ignore, tracker, text, word);
4850 /* Breakpoint all functions matching regular expression. */
4853 rbreak_command_wrapper (char *regexp, int from_tty)
4855 rbreak_command (regexp, from_tty);
4859 rbreak_command (const char *regexp, int from_tty)
4862 const char **files = NULL;
4863 const char *file_name;
4868 const char *colon = strchr (regexp, ':');
4870 if (colon && *(colon + 1) != ':')
4875 colon_index = colon - regexp;
4876 local_name = (char *) alloca (colon_index + 1);
4877 memcpy (local_name, regexp, colon_index);
4878 local_name[colon_index--] = 0;
4879 while (isspace (local_name[colon_index]))
4880 local_name[colon_index--] = 0;
4881 file_name = local_name;
4884 regexp = skip_spaces (colon + 1);
4888 std::vector<symbol_search> symbols = search_symbols (regexp,
4893 scoped_rbreak_breakpoints finalize;
4894 for (const symbol_search &p : symbols)
4896 if (p.msymbol.minsym == NULL)
4898 struct symtab *symtab = symbol_symtab (p.symbol);
4899 const char *fullname = symtab_to_fullname (symtab);
4901 string = string_printf ("%s:'%s'", fullname,
4902 SYMBOL_LINKAGE_NAME (p.symbol));
4903 break_command (&string[0], from_tty);
4904 print_symbol_info (FUNCTIONS_DOMAIN, p.symbol, p.block, NULL);
4908 string = string_printf ("'%s'",
4909 MSYMBOL_LINKAGE_NAME (p.msymbol.minsym));
4911 break_command (&string[0], from_tty);
4912 printf_filtered ("<function, no debug info> %s;\n",
4913 MSYMBOL_PRINT_NAME (p.msymbol.minsym));
4919 /* Evaluate if SYMNAME matches LOOKUP_NAME. */
4922 compare_symbol_name (const char *symbol_name, language symbol_language,
4923 const lookup_name_info &lookup_name,
4924 completion_match_result &match_res)
4926 const language_defn *lang = language_def (symbol_language);
4928 symbol_name_matcher_ftype *name_match
4929 = get_symbol_name_matcher (lang, lookup_name);
4931 return name_match (symbol_name, lookup_name, &match_res);
4937 completion_list_add_name (completion_tracker &tracker,
4938 language symbol_language,
4939 const char *symname,
4940 const lookup_name_info &lookup_name,
4941 const char *text, const char *word)
4943 completion_match_result &match_res
4944 = tracker.reset_completion_match_result ();
4946 /* Clip symbols that cannot match. */
4947 if (!compare_symbol_name (symname, symbol_language, lookup_name, match_res))
4950 /* Refresh SYMNAME from the match string. It's potentially
4951 different depending on language. (E.g., on Ada, the match may be
4952 the encoded symbol name wrapped in "<>"). */
4953 symname = match_res.match.match ();
4954 gdb_assert (symname != NULL);
4956 /* We have a match for a completion, so add SYMNAME to the current list
4957 of matches. Note that the name is moved to freshly malloc'd space. */
4960 gdb::unique_xmalloc_ptr<char> completion
4961 = make_completion_match_str (symname, text, word);
4963 /* Here we pass the match-for-lcd object to add_completion. Some
4964 languages match the user text against substrings of symbol
4965 names in some cases. E.g., in C++, "b push_ba" completes to
4966 "std::vector::push_back", "std::string::push_back", etc., and
4967 in this case we want the completion lowest common denominator
4968 to be "push_back" instead of "std::". */
4969 tracker.add_completion (std::move (completion),
4970 &match_res.match_for_lcd, text, word);
4974 /* completion_list_add_name wrapper for struct symbol. */
4977 completion_list_add_symbol (completion_tracker &tracker,
4979 const lookup_name_info &lookup_name,
4980 const char *text, const char *word)
4982 completion_list_add_name (tracker, SYMBOL_LANGUAGE (sym),
4983 SYMBOL_NATURAL_NAME (sym),
4984 lookup_name, text, word);
4987 /* completion_list_add_name wrapper for struct minimal_symbol. */
4990 completion_list_add_msymbol (completion_tracker &tracker,
4991 minimal_symbol *sym,
4992 const lookup_name_info &lookup_name,
4993 const char *text, const char *word)
4995 completion_list_add_name (tracker, MSYMBOL_LANGUAGE (sym),
4996 MSYMBOL_NATURAL_NAME (sym),
4997 lookup_name, text, word);
5001 /* ObjC: In case we are completing on a selector, look as the msymbol
5002 again and feed all the selectors into the mill. */
5005 completion_list_objc_symbol (completion_tracker &tracker,
5006 struct minimal_symbol *msymbol,
5007 const lookup_name_info &lookup_name,
5008 const char *text, const char *word)
5010 static char *tmp = NULL;
5011 static unsigned int tmplen = 0;
5013 const char *method, *category, *selector;
5016 method = MSYMBOL_NATURAL_NAME (msymbol);
5018 /* Is it a method? */
5019 if ((method[0] != '-') && (method[0] != '+'))
5023 /* Complete on shortened method method. */
5024 completion_list_add_name (tracker, language_objc,
5029 while ((strlen (method) + 1) >= tmplen)
5035 tmp = (char *) xrealloc (tmp, tmplen);
5037 selector = strchr (method, ' ');
5038 if (selector != NULL)
5041 category = strchr (method, '(');
5043 if ((category != NULL) && (selector != NULL))
5045 memcpy (tmp, method, (category - method));
5046 tmp[category - method] = ' ';
5047 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
5048 completion_list_add_name (tracker, language_objc, tmp,
5049 lookup_name, text, word);
5051 completion_list_add_name (tracker, language_objc, tmp + 1,
5052 lookup_name, text, word);
5055 if (selector != NULL)
5057 /* Complete on selector only. */
5058 strcpy (tmp, selector);
5059 tmp2 = strchr (tmp, ']');
5063 completion_list_add_name (tracker, language_objc, tmp,
5064 lookup_name, text, word);
5068 /* Break the non-quoted text based on the characters which are in
5069 symbols. FIXME: This should probably be language-specific. */
5072 language_search_unquoted_string (const char *text, const char *p)
5074 for (; p > text; --p)
5076 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
5080 if ((current_language->la_language == language_objc))
5082 if (p[-1] == ':') /* Might be part of a method name. */
5084 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
5085 p -= 2; /* Beginning of a method name. */
5086 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
5087 { /* Might be part of a method name. */
5090 /* Seeing a ' ' or a '(' is not conclusive evidence
5091 that we are in the middle of a method name. However,
5092 finding "-[" or "+[" should be pretty un-ambiguous.
5093 Unfortunately we have to find it now to decide. */
5096 if (isalnum (t[-1]) || t[-1] == '_' ||
5097 t[-1] == ' ' || t[-1] == ':' ||
5098 t[-1] == '(' || t[-1] == ')')
5103 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
5104 p = t - 2; /* Method name detected. */
5105 /* Else we leave with p unchanged. */
5115 completion_list_add_fields (completion_tracker &tracker,
5117 const lookup_name_info &lookup_name,
5118 const char *text, const char *word)
5120 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
5122 struct type *t = SYMBOL_TYPE (sym);
5123 enum type_code c = TYPE_CODE (t);
5126 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
5127 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
5128 if (TYPE_FIELD_NAME (t, j))
5129 completion_list_add_name (tracker, SYMBOL_LANGUAGE (sym),
5130 TYPE_FIELD_NAME (t, j),
5131 lookup_name, text, word);
5138 symbol_is_function_or_method (symbol *sym)
5140 switch (TYPE_CODE (SYMBOL_TYPE (sym)))
5142 case TYPE_CODE_FUNC:
5143 case TYPE_CODE_METHOD:
5153 symbol_is_function_or_method (minimal_symbol *msymbol)
5155 switch (MSYMBOL_TYPE (msymbol))
5158 case mst_text_gnu_ifunc:
5159 case mst_solib_trampoline:
5169 bound_minimal_symbol
5170 find_gnu_ifunc (const symbol *sym)
5172 if (SYMBOL_CLASS (sym) != LOC_BLOCK)
5175 lookup_name_info lookup_name (SYMBOL_SEARCH_NAME (sym),
5176 symbol_name_match_type::SEARCH_NAME);
5177 struct objfile *objfile = symbol_objfile (sym);
5179 CORE_ADDR address = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym));
5180 minimal_symbol *ifunc = NULL;
5182 iterate_over_minimal_symbols (objfile, lookup_name,
5183 [&] (minimal_symbol *minsym)
5185 if (MSYMBOL_TYPE (minsym) == mst_text_gnu_ifunc
5186 || MSYMBOL_TYPE (minsym) == mst_data_gnu_ifunc)
5188 CORE_ADDR msym_addr = MSYMBOL_VALUE_ADDRESS (objfile, minsym);
5189 if (MSYMBOL_TYPE (minsym) == mst_data_gnu_ifunc)
5191 struct gdbarch *gdbarch = get_objfile_arch (objfile);
5193 = gdbarch_convert_from_func_ptr_addr (gdbarch,
5195 current_top_target ());
5197 if (msym_addr == address)
5207 return {ifunc, objfile};
5211 /* Add matching symbols from SYMTAB to the current completion list. */
5214 add_symtab_completions (struct compunit_symtab *cust,
5215 completion_tracker &tracker,
5216 complete_symbol_mode mode,
5217 const lookup_name_info &lookup_name,
5218 const char *text, const char *word,
5219 enum type_code code)
5222 const struct block *b;
5223 struct block_iterator iter;
5229 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
5232 b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), i);
5233 ALL_BLOCK_SYMBOLS (b, iter, sym)
5235 if (completion_skip_symbol (mode, sym))
5238 if (code == TYPE_CODE_UNDEF
5239 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
5240 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
5241 completion_list_add_symbol (tracker, sym,
5249 default_collect_symbol_completion_matches_break_on
5250 (completion_tracker &tracker, complete_symbol_mode mode,
5251 symbol_name_match_type name_match_type,
5252 const char *text, const char *word,
5253 const char *break_on, enum type_code code)
5255 /* Problem: All of the symbols have to be copied because readline
5256 frees them. I'm not going to worry about this; hopefully there
5257 won't be that many. */
5260 const struct block *b;
5261 const struct block *surrounding_static_block, *surrounding_global_block;
5262 struct block_iterator iter;
5263 /* The symbol we are completing on. Points in same buffer as text. */
5264 const char *sym_text;
5266 /* Now look for the symbol we are supposed to complete on. */
5267 if (mode == complete_symbol_mode::LINESPEC)
5273 const char *quote_pos = NULL;
5275 /* First see if this is a quoted string. */
5277 for (p = text; *p != '\0'; ++p)
5279 if (quote_found != '\0')
5281 if (*p == quote_found)
5282 /* Found close quote. */
5284 else if (*p == '\\' && p[1] == quote_found)
5285 /* A backslash followed by the quote character
5286 doesn't end the string. */
5289 else if (*p == '\'' || *p == '"')
5295 if (quote_found == '\'')
5296 /* A string within single quotes can be a symbol, so complete on it. */
5297 sym_text = quote_pos + 1;
5298 else if (quote_found == '"')
5299 /* A double-quoted string is never a symbol, nor does it make sense
5300 to complete it any other way. */
5306 /* It is not a quoted string. Break it based on the characters
5307 which are in symbols. */
5310 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
5311 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
5320 lookup_name_info lookup_name (sym_text, name_match_type, true);
5322 /* At this point scan through the misc symbol vectors and add each
5323 symbol you find to the list. Eventually we want to ignore
5324 anything that isn't a text symbol (everything else will be
5325 handled by the psymtab code below). */
5327 if (code == TYPE_CODE_UNDEF)
5329 for (objfile *objfile : current_program_space->objfiles ())
5331 for (minimal_symbol *msymbol : objfile->msymbols ())
5335 if (completion_skip_symbol (mode, msymbol))
5338 completion_list_add_msymbol (tracker, msymbol, lookup_name,
5341 completion_list_objc_symbol (tracker, msymbol, lookup_name,
5347 /* Add completions for all currently loaded symbol tables. */
5348 for (objfile *objfile : current_program_space->objfiles ())
5350 for (compunit_symtab *cust : objfile->compunits ())
5351 add_symtab_completions (cust, tracker, mode, lookup_name,
5352 sym_text, word, code);
5355 /* Look through the partial symtabs for all symbols which begin by
5356 matching SYM_TEXT. Expand all CUs that you find to the list. */
5357 expand_symtabs_matching (NULL,
5360 [&] (compunit_symtab *symtab) /* expansion notify */
5362 add_symtab_completions (symtab,
5363 tracker, mode, lookup_name,
5364 sym_text, word, code);
5368 /* Search upwards from currently selected frame (so that we can
5369 complete on local vars). Also catch fields of types defined in
5370 this places which match our text string. Only complete on types
5371 visible from current context. */
5373 b = get_selected_block (0);
5374 surrounding_static_block = block_static_block (b);
5375 surrounding_global_block = block_global_block (b);
5376 if (surrounding_static_block != NULL)
5377 while (b != surrounding_static_block)
5381 ALL_BLOCK_SYMBOLS (b, iter, sym)
5383 if (code == TYPE_CODE_UNDEF)
5385 completion_list_add_symbol (tracker, sym, lookup_name,
5387 completion_list_add_fields (tracker, sym, lookup_name,
5390 else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
5391 && TYPE_CODE (SYMBOL_TYPE (sym)) == code)
5392 completion_list_add_symbol (tracker, sym, lookup_name,
5396 /* Stop when we encounter an enclosing function. Do not stop for
5397 non-inlined functions - the locals of the enclosing function
5398 are in scope for a nested function. */
5399 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
5401 b = BLOCK_SUPERBLOCK (b);
5404 /* Add fields from the file's types; symbols will be added below. */
5406 if (code == TYPE_CODE_UNDEF)
5408 if (surrounding_static_block != NULL)
5409 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
5410 completion_list_add_fields (tracker, sym, lookup_name,
5413 if (surrounding_global_block != NULL)
5414 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
5415 completion_list_add_fields (tracker, sym, lookup_name,
5419 /* Skip macros if we are completing a struct tag -- arguable but
5420 usually what is expected. */
5421 if (current_language->la_macro_expansion == macro_expansion_c
5422 && code == TYPE_CODE_UNDEF)
5424 gdb::unique_xmalloc_ptr<struct macro_scope> scope;
5426 /* This adds a macro's name to the current completion list. */
5427 auto add_macro_name = [&] (const char *macro_name,
5428 const macro_definition *,
5429 macro_source_file *,
5432 completion_list_add_name (tracker, language_c, macro_name,
5433 lookup_name, sym_text, word);
5436 /* Add any macros visible in the default scope. Note that this
5437 may yield the occasional wrong result, because an expression
5438 might be evaluated in a scope other than the default. For
5439 example, if the user types "break file:line if <TAB>", the
5440 resulting expression will be evaluated at "file:line" -- but
5441 at there does not seem to be a way to detect this at
5443 scope = default_macro_scope ();
5445 macro_for_each_in_scope (scope->file, scope->line,
5448 /* User-defined macros are always visible. */
5449 macro_for_each (macro_user_macros, add_macro_name);
5454 default_collect_symbol_completion_matches (completion_tracker &tracker,
5455 complete_symbol_mode mode,
5456 symbol_name_match_type name_match_type,
5457 const char *text, const char *word,
5458 enum type_code code)
5460 return default_collect_symbol_completion_matches_break_on (tracker, mode,
5466 /* Collect all symbols (regardless of class) which begin by matching
5470 collect_symbol_completion_matches (completion_tracker &tracker,
5471 complete_symbol_mode mode,
5472 symbol_name_match_type name_match_type,
5473 const char *text, const char *word)
5475 current_language->la_collect_symbol_completion_matches (tracker, mode,
5481 /* Like collect_symbol_completion_matches, but only collect
5482 STRUCT_DOMAIN symbols whose type code is CODE. */
5485 collect_symbol_completion_matches_type (completion_tracker &tracker,
5486 const char *text, const char *word,
5487 enum type_code code)
5489 complete_symbol_mode mode = complete_symbol_mode::EXPRESSION;
5490 symbol_name_match_type name_match_type = symbol_name_match_type::EXPRESSION;
5492 gdb_assert (code == TYPE_CODE_UNION
5493 || code == TYPE_CODE_STRUCT
5494 || code == TYPE_CODE_ENUM);
5495 current_language->la_collect_symbol_completion_matches (tracker, mode,
5500 /* Like collect_symbol_completion_matches, but collects a list of
5501 symbols defined in all source files named SRCFILE. */
5504 collect_file_symbol_completion_matches (completion_tracker &tracker,
5505 complete_symbol_mode mode,
5506 symbol_name_match_type name_match_type,
5507 const char *text, const char *word,
5508 const char *srcfile)
5510 /* The symbol we are completing on. Points in same buffer as text. */
5511 const char *sym_text;
5513 /* Now look for the symbol we are supposed to complete on.
5514 FIXME: This should be language-specific. */
5515 if (mode == complete_symbol_mode::LINESPEC)
5521 const char *quote_pos = NULL;
5523 /* First see if this is a quoted string. */
5525 for (p = text; *p != '\0'; ++p)
5527 if (quote_found != '\0')
5529 if (*p == quote_found)
5530 /* Found close quote. */
5532 else if (*p == '\\' && p[1] == quote_found)
5533 /* A backslash followed by the quote character
5534 doesn't end the string. */
5537 else if (*p == '\'' || *p == '"')
5543 if (quote_found == '\'')
5544 /* A string within single quotes can be a symbol, so complete on it. */
5545 sym_text = quote_pos + 1;
5546 else if (quote_found == '"')
5547 /* A double-quoted string is never a symbol, nor does it make sense
5548 to complete it any other way. */
5554 /* Not a quoted string. */
5555 sym_text = language_search_unquoted_string (text, p);
5559 lookup_name_info lookup_name (sym_text, name_match_type, true);
5561 /* Go through symtabs for SRCFILE and check the externs and statics
5562 for symbols which match. */
5563 iterate_over_symtabs (srcfile, [&] (symtab *s)
5565 add_symtab_completions (SYMTAB_COMPUNIT (s),
5566 tracker, mode, lookup_name,
5567 sym_text, word, TYPE_CODE_UNDEF);
5572 /* A helper function for make_source_files_completion_list. It adds
5573 another file name to a list of possible completions, growing the
5574 list as necessary. */
5577 add_filename_to_list (const char *fname, const char *text, const char *word,
5578 completion_list *list)
5580 list->emplace_back (make_completion_match_str (fname, text, word));
5584 not_interesting_fname (const char *fname)
5586 static const char *illegal_aliens[] = {
5587 "_globals_", /* inserted by coff_symtab_read */
5592 for (i = 0; illegal_aliens[i]; i++)
5594 if (filename_cmp (fname, illegal_aliens[i]) == 0)
5600 /* An object of this type is passed as the user_data argument to
5601 map_partial_symbol_filenames. */
5602 struct add_partial_filename_data
5604 struct filename_seen_cache *filename_seen_cache;
5608 completion_list *list;
5611 /* A callback for map_partial_symbol_filenames. */
5614 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
5617 struct add_partial_filename_data *data
5618 = (struct add_partial_filename_data *) user_data;
5620 if (not_interesting_fname (filename))
5622 if (!data->filename_seen_cache->seen (filename)
5623 && filename_ncmp (filename, data->text, data->text_len) == 0)
5625 /* This file matches for a completion; add it to the
5626 current list of matches. */
5627 add_filename_to_list (filename, data->text, data->word, data->list);
5631 const char *base_name = lbasename (filename);
5633 if (base_name != filename
5634 && !data->filename_seen_cache->seen (base_name)
5635 && filename_ncmp (base_name, data->text, data->text_len) == 0)
5636 add_filename_to_list (base_name, data->text, data->word, data->list);
5640 /* Return a list of all source files whose names begin with matching
5641 TEXT. The file names are looked up in the symbol tables of this
5645 make_source_files_completion_list (const char *text, const char *word)
5647 size_t text_len = strlen (text);
5648 completion_list list;
5649 const char *base_name;
5650 struct add_partial_filename_data datum;
5652 if (!have_full_symbols () && !have_partial_symbols ())
5655 filename_seen_cache filenames_seen;
5657 for (objfile *objfile : current_program_space->objfiles ())
5659 for (compunit_symtab *cu : objfile->compunits ())
5661 for (symtab *s : compunit_filetabs (cu))
5663 if (not_interesting_fname (s->filename))
5665 if (!filenames_seen.seen (s->filename)
5666 && filename_ncmp (s->filename, text, text_len) == 0)
5668 /* This file matches for a completion; add it to the current
5670 add_filename_to_list (s->filename, text, word, &list);
5674 /* NOTE: We allow the user to type a base name when the
5675 debug info records leading directories, but not the other
5676 way around. This is what subroutines of breakpoint
5677 command do when they parse file names. */
5678 base_name = lbasename (s->filename);
5679 if (base_name != s->filename
5680 && !filenames_seen.seen (base_name)
5681 && filename_ncmp (base_name, text, text_len) == 0)
5682 add_filename_to_list (base_name, text, word, &list);
5688 datum.filename_seen_cache = &filenames_seen;
5691 datum.text_len = text_len;
5693 map_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
5694 0 /*need_fullname*/);
5701 /* Return the "main_info" object for the current program space. If
5702 the object has not yet been created, create it and fill in some
5705 static struct main_info *
5706 get_main_info (void)
5708 struct main_info *info = main_progspace_key.get (current_program_space);
5712 /* It may seem strange to store the main name in the progspace
5713 and also in whatever objfile happens to see a main name in
5714 its debug info. The reason for this is mainly historical:
5715 gdb returned "main" as the name even if no function named
5716 "main" was defined the program; and this approach lets us
5717 keep compatibility. */
5718 info = main_progspace_key.emplace (current_program_space);
5725 set_main_name (const char *name, enum language lang)
5727 struct main_info *info = get_main_info ();
5729 if (info->name_of_main != NULL)
5731 xfree (info->name_of_main);
5732 info->name_of_main = NULL;
5733 info->language_of_main = language_unknown;
5737 info->name_of_main = xstrdup (name);
5738 info->language_of_main = lang;
5742 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5746 find_main_name (void)
5748 const char *new_main_name;
5750 /* First check the objfiles to see whether a debuginfo reader has
5751 picked up the appropriate main name. Historically the main name
5752 was found in a more or less random way; this approach instead
5753 relies on the order of objfile creation -- which still isn't
5754 guaranteed to get the correct answer, but is just probably more
5756 for (objfile *objfile : current_program_space->objfiles ())
5758 if (objfile->per_bfd->name_of_main != NULL)
5760 set_main_name (objfile->per_bfd->name_of_main,
5761 objfile->per_bfd->language_of_main);
5766 /* Try to see if the main procedure is in Ada. */
5767 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5768 be to add a new method in the language vector, and call this
5769 method for each language until one of them returns a non-empty
5770 name. This would allow us to remove this hard-coded call to
5771 an Ada function. It is not clear that this is a better approach
5772 at this point, because all methods need to be written in a way
5773 such that false positives never be returned. For instance, it is
5774 important that a method does not return a wrong name for the main
5775 procedure if the main procedure is actually written in a different
5776 language. It is easy to guaranty this with Ada, since we use a
5777 special symbol generated only when the main in Ada to find the name
5778 of the main procedure. It is difficult however to see how this can
5779 be guarantied for languages such as C, for instance. This suggests
5780 that order of call for these methods becomes important, which means
5781 a more complicated approach. */
5782 new_main_name = ada_main_name ();
5783 if (new_main_name != NULL)
5785 set_main_name (new_main_name, language_ada);
5789 new_main_name = d_main_name ();
5790 if (new_main_name != NULL)
5792 set_main_name (new_main_name, language_d);
5796 new_main_name = go_main_name ();
5797 if (new_main_name != NULL)
5799 set_main_name (new_main_name, language_go);
5803 new_main_name = pascal_main_name ();
5804 if (new_main_name != NULL)
5806 set_main_name (new_main_name, language_pascal);
5810 /* The languages above didn't identify the name of the main procedure.
5811 Fallback to "main". */
5812 set_main_name ("main", language_unknown);
5820 struct main_info *info = get_main_info ();
5822 if (info->name_of_main == NULL)
5825 return info->name_of_main;
5828 /* Return the language of the main function. If it is not known,
5829 return language_unknown. */
5832 main_language (void)
5834 struct main_info *info = get_main_info ();
5836 if (info->name_of_main == NULL)
5839 return info->language_of_main;
5842 /* Handle ``executable_changed'' events for the symtab module. */
5845 symtab_observer_executable_changed (void)
5847 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5848 set_main_name (NULL, language_unknown);
5851 /* Return 1 if the supplied producer string matches the ARM RealView
5852 compiler (armcc). */
5855 producer_is_realview (const char *producer)
5857 static const char *const arm_idents[] = {
5858 "ARM C Compiler, ADS",
5859 "Thumb C Compiler, ADS",
5860 "ARM C++ Compiler, ADS",
5861 "Thumb C++ Compiler, ADS",
5862 "ARM/Thumb C/C++ Compiler, RVCT",
5863 "ARM C/C++ Compiler, RVCT"
5867 if (producer == NULL)
5870 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
5871 if (startswith (producer, arm_idents[i]))
5879 /* The next index to hand out in response to a registration request. */
5881 static int next_aclass_value = LOC_FINAL_VALUE;
5883 /* The maximum number of "aclass" registrations we support. This is
5884 constant for convenience. */
5885 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5887 /* The objects representing the various "aclass" values. The elements
5888 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5889 elements are those registered at gdb initialization time. */
5891 static struct symbol_impl symbol_impl[MAX_SYMBOL_IMPLS];
5893 /* The globally visible pointer. This is separate from 'symbol_impl'
5894 so that it can be const. */
5896 const struct symbol_impl *symbol_impls = &symbol_impl[0];
5898 /* Make sure we saved enough room in struct symbol. */
5900 gdb_static_assert (MAX_SYMBOL_IMPLS <= (1 << SYMBOL_ACLASS_BITS));
5902 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5903 is the ops vector associated with this index. This returns the new
5904 index, which should be used as the aclass_index field for symbols
5908 register_symbol_computed_impl (enum address_class aclass,
5909 const struct symbol_computed_ops *ops)
5911 int result = next_aclass_value++;
5913 gdb_assert (aclass == LOC_COMPUTED);
5914 gdb_assert (result < MAX_SYMBOL_IMPLS);
5915 symbol_impl[result].aclass = aclass;
5916 symbol_impl[result].ops_computed = ops;
5918 /* Sanity check OPS. */
5919 gdb_assert (ops != NULL);
5920 gdb_assert (ops->tracepoint_var_ref != NULL);
5921 gdb_assert (ops->describe_location != NULL);
5922 gdb_assert (ops->get_symbol_read_needs != NULL);
5923 gdb_assert (ops->read_variable != NULL);
5928 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5929 OPS is the ops vector associated with this index. This returns the
5930 new index, which should be used as the aclass_index field for symbols
5934 register_symbol_block_impl (enum address_class aclass,
5935 const struct symbol_block_ops *ops)
5937 int result = next_aclass_value++;
5939 gdb_assert (aclass == LOC_BLOCK);
5940 gdb_assert (result < MAX_SYMBOL_IMPLS);
5941 symbol_impl[result].aclass = aclass;
5942 symbol_impl[result].ops_block = ops;
5944 /* Sanity check OPS. */
5945 gdb_assert (ops != NULL);
5946 gdb_assert (ops->find_frame_base_location != NULL);
5951 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5952 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5953 this index. This returns the new index, which should be used as
5954 the aclass_index field for symbols of this type. */
5957 register_symbol_register_impl (enum address_class aclass,
5958 const struct symbol_register_ops *ops)
5960 int result = next_aclass_value++;
5962 gdb_assert (aclass == LOC_REGISTER || aclass == LOC_REGPARM_ADDR);
5963 gdb_assert (result < MAX_SYMBOL_IMPLS);
5964 symbol_impl[result].aclass = aclass;
5965 symbol_impl[result].ops_register = ops;
5970 /* Initialize elements of 'symbol_impl' for the constants in enum
5974 initialize_ordinary_address_classes (void)
5978 for (i = 0; i < LOC_FINAL_VALUE; ++i)
5979 symbol_impl[i].aclass = (enum address_class) i;
5984 /* Helper function to initialize the fields of an objfile-owned symbol.
5985 It assumed that *SYM is already all zeroes. */
5988 initialize_objfile_symbol_1 (struct symbol *sym)
5990 SYMBOL_OBJFILE_OWNED (sym) = 1;
5991 SYMBOL_SECTION (sym) = -1;
5994 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
5997 initialize_objfile_symbol (struct symbol *sym)
5999 memset (sym, 0, sizeof (*sym));
6000 initialize_objfile_symbol_1 (sym);
6003 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
6007 allocate_symbol (struct objfile *objfile)
6009 struct symbol *result;
6011 result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
6012 initialize_objfile_symbol_1 (result);
6017 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
6020 struct template_symbol *
6021 allocate_template_symbol (struct objfile *objfile)
6023 struct template_symbol *result;
6025 result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct template_symbol);
6026 initialize_objfile_symbol_1 (result);
6034 symbol_objfile (const struct symbol *symbol)
6036 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol));
6037 return SYMTAB_OBJFILE (symbol->owner.symtab);
6043 symbol_arch (const struct symbol *symbol)
6045 if (!SYMBOL_OBJFILE_OWNED (symbol))
6046 return symbol->owner.arch;
6047 return get_objfile_arch (SYMTAB_OBJFILE (symbol->owner.symtab));
6053 symbol_symtab (const struct symbol *symbol)
6055 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol));
6056 return symbol->owner.symtab;
6062 symbol_set_symtab (struct symbol *symbol, struct symtab *symtab)
6064 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol));
6065 symbol->owner.symtab = symtab;
6071 _initialize_symtab (void)
6073 cmd_list_element *c;
6075 initialize_ordinary_address_classes ();
6077 c = add_info ("variables", info_variables_command,
6078 info_print_args_help (_("\
6079 All global and static variable names or those matching REGEXPs.\n\
6080 Usage: info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6081 Prints the global and static variables.\n"),
6082 _("global and static variables")));
6083 set_cmd_completer_handle_brkchars (c, info_print_command_completer);
6086 c = add_com ("whereis", class_info, info_variables_command,
6087 info_print_args_help (_("\
6088 All global and static variable names, or those matching REGEXPs.\n\
6089 Usage: whereis [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6090 Prints the global and static variables.\n"),
6091 _("global and static variables")));
6092 set_cmd_completer_handle_brkchars (c, info_print_command_completer);
6095 c = add_info ("functions", info_functions_command,
6096 info_print_args_help (_("\
6097 All function names or those matching REGEXPs.\n\
6098 Usage: info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6099 Prints the functions.\n"),
6101 set_cmd_completer_handle_brkchars (c, info_print_command_completer);
6103 c = add_info ("types", info_types_command, _("\
6104 All type names, or those matching REGEXP.\n\
6105 Usage: info types [-q] [REGEXP]\n\
6106 Print information about all types matching REGEXP, or all types if no\n\
6107 REGEXP is given. The optional flag -q disables printing of headers."));
6108 set_cmd_completer_handle_brkchars (c, info_types_command_completer);
6110 add_info ("sources", info_sources_command,
6111 _("Source files in the program."));
6113 add_com ("rbreak", class_breakpoint, rbreak_command,
6114 _("Set a breakpoint for all functions matching REGEXP."));
6116 add_setshow_enum_cmd ("multiple-symbols", no_class,
6117 multiple_symbols_modes, &multiple_symbols_mode,
6119 Set the debugger behavior when more than one symbol are possible matches\n\
6120 in an expression."), _("\
6121 Show how the debugger handles ambiguities in expressions."), _("\
6122 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6123 NULL, NULL, &setlist, &showlist);
6125 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
6126 &basenames_may_differ, _("\
6127 Set whether a source file may have multiple base names."), _("\
6128 Show whether a source file may have multiple base names."), _("\
6129 (A \"base name\" is the name of a file with the directory part removed.\n\
6130 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6131 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6132 before comparing them. Canonicalization is an expensive operation,\n\
6133 but it allows the same file be known by more than one base name.\n\
6134 If not set (the default), all source files are assumed to have just\n\
6135 one base name, and gdb will do file name comparisons more efficiently."),
6137 &setlist, &showlist);
6139 add_setshow_zuinteger_cmd ("symtab-create", no_class, &symtab_create_debug,
6140 _("Set debugging of symbol table creation."),
6141 _("Show debugging of symbol table creation."), _("\
6142 When enabled (non-zero), debugging messages are printed when building\n\
6143 symbol tables. A value of 1 (one) normally provides enough information.\n\
6144 A value greater than 1 provides more verbose information."),
6147 &setdebuglist, &showdebuglist);
6149 add_setshow_zuinteger_cmd ("symbol-lookup", no_class, &symbol_lookup_debug,
6151 Set debugging of symbol lookup."), _("\
6152 Show debugging of symbol lookup."), _("\
6153 When enabled (non-zero), symbol lookups are logged."),
6155 &setdebuglist, &showdebuglist);
6157 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class,
6158 &new_symbol_cache_size,
6159 _("Set the size of the symbol cache."),
6160 _("Show the size of the symbol cache."), _("\
6161 The size of the symbol cache.\n\
6162 If zero then the symbol cache is disabled."),
6163 set_symbol_cache_size_handler, NULL,
6164 &maintenance_set_cmdlist,
6165 &maintenance_show_cmdlist);
6167 add_cmd ("symbol-cache", class_maintenance, maintenance_print_symbol_cache,
6168 _("Dump the symbol cache for each program space."),
6169 &maintenanceprintlist);
6171 add_cmd ("symbol-cache-statistics", class_maintenance,
6172 maintenance_print_symbol_cache_statistics,
6173 _("Print symbol cache statistics for each program space."),
6174 &maintenanceprintlist);
6176 add_cmd ("flush-symbol-cache", class_maintenance,
6177 maintenance_flush_symbol_cache,
6178 _("Flush the symbol cache for each program space."),
6181 gdb::observers::executable_changed.attach (symtab_observer_executable_changed);
6182 gdb::observers::new_objfile.attach (symtab_new_objfile_observer);
6183 gdb::observers::free_objfile.attach (symtab_free_objfile_observer);