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"
46 #include "typeprint.h"
48 #include "gdb_obstack.h"
50 #include "dictionary.h"
52 #include <sys/types.h>
57 #include "cp-support.h"
58 #include "observable.h"
61 #include "macroscope.h"
63 #include "parser-defs.h"
64 #include "completer.h"
65 #include "progspace-and-thread.h"
66 #include "common/gdb_optional.h"
67 #include "filename-seen-cache.h"
68 #include "arch-utils.h"
70 #include "common/pathstuff.h"
72 /* Forward declarations for local functions. */
74 static void rbreak_command (const char *, int);
76 static int find_line_common (struct linetable
*, int, int *, int);
78 static struct block_symbol
79 lookup_symbol_aux (const char *name
,
80 symbol_name_match_type match_type
,
81 const struct block
*block
,
82 const domain_enum domain
,
83 enum language language
,
84 struct field_of_this_result
*);
87 struct block_symbol
lookup_local_symbol (const char *name
,
88 symbol_name_match_type match_type
,
89 const struct block
*block
,
90 const domain_enum domain
,
91 enum language language
);
93 static struct block_symbol
94 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
95 const char *name
, const domain_enum domain
);
98 const struct block_symbol null_block_symbol
= { NULL
, NULL
};
100 /* Program space key for finding name and language of "main". */
102 static const struct program_space_data
*main_progspace_key
;
104 /* Type of the data stored on the program space. */
108 /* Name of "main". */
112 /* Language of "main". */
114 enum language language_of_main
;
117 /* Program space key for finding its symbol cache. */
119 static const struct program_space_data
*symbol_cache_key
;
121 /* The default symbol cache size.
122 There is no extra cpu cost for large N (except when flushing the cache,
123 which is rare). The value here is just a first attempt. A better default
124 value may be higher or lower. A prime number can make up for a bad hash
125 computation, so that's why the number is what it is. */
126 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
128 /* The maximum symbol cache size.
129 There's no method to the decision of what value to use here, other than
130 there's no point in allowing a user typo to make gdb consume all memory. */
131 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
133 /* symbol_cache_lookup returns this if a previous lookup failed to find the
134 symbol in any objfile. */
135 #define SYMBOL_LOOKUP_FAILED \
136 ((struct block_symbol) {(struct symbol *) 1, NULL})
137 #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)
139 /* Recording lookups that don't find the symbol is just as important, if not
140 more so, than recording found symbols. */
142 enum symbol_cache_slot_state
145 SYMBOL_SLOT_NOT_FOUND
,
149 struct symbol_cache_slot
151 enum symbol_cache_slot_state state
;
153 /* The objfile that was current when the symbol was looked up.
154 This is only needed for global blocks, but for simplicity's sake
155 we allocate the space for both. If data shows the extra space used
156 for static blocks is a problem, we can split things up then.
158 Global blocks need cache lookup to include the objfile context because
159 we need to account for gdbarch_iterate_over_objfiles_in_search_order
160 which can traverse objfiles in, effectively, any order, depending on
161 the current objfile, thus affecting which symbol is found. Normally,
162 only the current objfile is searched first, and then the rest are
163 searched in recorded order; but putting cache lookup inside
164 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
165 Instead we just make the current objfile part of the context of
166 cache lookup. This means we can record the same symbol multiple times,
167 each with a different "current objfile" that was in effect when the
168 lookup was saved in the cache, but cache space is pretty cheap. */
169 const struct objfile
*objfile_context
;
173 struct block_symbol found
;
182 /* Symbols don't specify global vs static block.
183 So keep them in separate caches. */
185 struct block_symbol_cache
189 unsigned int collisions
;
191 /* SYMBOLS is a variable length array of this size.
192 One can imagine that in general one cache (global/static) should be a
193 fraction of the size of the other, but there's no data at the moment
194 on which to decide. */
197 struct symbol_cache_slot symbols
[1];
202 Searching for symbols in the static and global blocks over multiple objfiles
203 again and again can be slow, as can searching very big objfiles. This is a
204 simple cache to improve symbol lookup performance, which is critical to
205 overall gdb performance.
207 Symbols are hashed on the name, its domain, and block.
208 They are also hashed on their objfile for objfile-specific lookups. */
212 struct block_symbol_cache
*global_symbols
;
213 struct block_symbol_cache
*static_symbols
;
216 /* When non-zero, print debugging messages related to symtab creation. */
217 unsigned int symtab_create_debug
= 0;
219 /* When non-zero, print debugging messages related to symbol lookup. */
220 unsigned int symbol_lookup_debug
= 0;
222 /* The size of the cache is staged here. */
223 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
225 /* The current value of the symbol cache size.
226 This is saved so that if the user enters a value too big we can restore
227 the original value from here. */
228 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
230 /* Non-zero if a file may be known by two different basenames.
231 This is the uncommon case, and significantly slows down gdb.
232 Default set to "off" to not slow down the common case. */
233 int basenames_may_differ
= 0;
235 /* Allow the user to configure the debugger behavior with respect
236 to multiple-choice menus when more than one symbol matches during
239 const char multiple_symbols_ask
[] = "ask";
240 const char multiple_symbols_all
[] = "all";
241 const char multiple_symbols_cancel
[] = "cancel";
242 static const char *const multiple_symbols_modes
[] =
244 multiple_symbols_ask
,
245 multiple_symbols_all
,
246 multiple_symbols_cancel
,
249 static const char *multiple_symbols_mode
= multiple_symbols_all
;
251 /* Read-only accessor to AUTO_SELECT_MODE. */
254 multiple_symbols_select_mode (void)
256 return multiple_symbols_mode
;
259 /* Return the name of a domain_enum. */
262 domain_name (domain_enum e
)
266 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
267 case VAR_DOMAIN
: return "VAR_DOMAIN";
268 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
269 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
270 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
271 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
272 default: gdb_assert_not_reached ("bad domain_enum");
276 /* Return the name of a search_domain . */
279 search_domain_name (enum search_domain e
)
283 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
284 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
285 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
286 case ALL_DOMAIN
: return "ALL_DOMAIN";
287 default: gdb_assert_not_reached ("bad search_domain");
294 compunit_primary_filetab (const struct compunit_symtab
*cust
)
296 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
298 /* The primary file symtab is the first one in the list. */
299 return COMPUNIT_FILETABS (cust
);
305 compunit_language (const struct compunit_symtab
*cust
)
307 struct symtab
*symtab
= compunit_primary_filetab (cust
);
309 /* The language of the compunit symtab is the language of its primary
311 return SYMTAB_LANGUAGE (symtab
);
314 /* See whether FILENAME matches SEARCH_NAME using the rule that we
315 advertise to the user. (The manual's description of linespecs
316 describes what we advertise). Returns true if they match, false
320 compare_filenames_for_search (const char *filename
, const char *search_name
)
322 int len
= strlen (filename
);
323 size_t search_len
= strlen (search_name
);
325 if (len
< search_len
)
328 /* The tail of FILENAME must match. */
329 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
332 /* Either the names must completely match, or the character
333 preceding the trailing SEARCH_NAME segment of FILENAME must be a
336 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
337 cannot match FILENAME "/path//dir/file.c" - as user has requested
338 absolute path. The sama applies for "c:\file.c" possibly
339 incorrectly hypothetically matching "d:\dir\c:\file.c".
341 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
342 compatible with SEARCH_NAME "file.c". In such case a compiler had
343 to put the "c:file.c" name into debug info. Such compatibility
344 works only on GDB built for DOS host. */
345 return (len
== search_len
346 || (!IS_ABSOLUTE_PATH (search_name
)
347 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
348 || (HAS_DRIVE_SPEC (filename
)
349 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
352 /* Same as compare_filenames_for_search, but for glob-style patterns.
353 Heads up on the order of the arguments. They match the order of
354 compare_filenames_for_search, but it's the opposite of the order of
355 arguments to gdb_filename_fnmatch. */
358 compare_glob_filenames_for_search (const char *filename
,
359 const char *search_name
)
361 /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
362 all /s have to be explicitly specified. */
363 int file_path_elements
= count_path_elements (filename
);
364 int search_path_elements
= count_path_elements (search_name
);
366 if (search_path_elements
> file_path_elements
)
369 if (IS_ABSOLUTE_PATH (search_name
))
371 return (search_path_elements
== file_path_elements
372 && gdb_filename_fnmatch (search_name
, filename
,
373 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0);
377 const char *file_to_compare
378 = strip_leading_path_elements (filename
,
379 file_path_elements
- search_path_elements
);
381 return gdb_filename_fnmatch (search_name
, file_to_compare
,
382 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0;
386 /* Check for a symtab of a specific name by searching some symtabs.
387 This is a helper function for callbacks of iterate_over_symtabs.
389 If NAME is not absolute, then REAL_PATH is NULL
390 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
392 The return value, NAME, REAL_PATH and CALLBACK are identical to the
393 `map_symtabs_matching_filename' method of quick_symbol_functions.
395 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
396 Each symtab within the specified compunit symtab is also searched.
397 AFTER_LAST is one past the last compunit symtab to search; NULL means to
398 search until the end of the list. */
401 iterate_over_some_symtabs (const char *name
,
402 const char *real_path
,
403 struct compunit_symtab
*first
,
404 struct compunit_symtab
*after_last
,
405 gdb::function_view
<bool (symtab
*)> callback
)
407 struct compunit_symtab
*cust
;
408 const char* base_name
= lbasename (name
);
410 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
412 for (symtab
*s
: compunit_filetabs (cust
))
414 if (compare_filenames_for_search (s
->filename
, name
))
421 /* Before we invoke realpath, which can get expensive when many
422 files are involved, do a quick comparison of the basenames. */
423 if (! basenames_may_differ
424 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
427 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
434 /* If the user gave us an absolute path, try to find the file in
435 this symtab and use its absolute path. */
436 if (real_path
!= NULL
)
438 const char *fullname
= symtab_to_fullname (s
);
440 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
441 gdb_assert (IS_ABSOLUTE_PATH (name
));
442 if (FILENAME_CMP (real_path
, fullname
) == 0)
455 /* Check for a symtab of a specific name; first in symtabs, then in
456 psymtabs. *If* there is no '/' in the name, a match after a '/'
457 in the symtab filename will also work.
459 Calls CALLBACK with each symtab that is found. If CALLBACK returns
460 true, the search stops. */
463 iterate_over_symtabs (const char *name
,
464 gdb::function_view
<bool (symtab
*)> callback
)
466 gdb::unique_xmalloc_ptr
<char> real_path
;
468 /* Here we are interested in canonicalizing an absolute path, not
469 absolutizing a relative path. */
470 if (IS_ABSOLUTE_PATH (name
))
472 real_path
= gdb_realpath (name
);
473 gdb_assert (IS_ABSOLUTE_PATH (real_path
.get ()));
476 for (objfile
*objfile
: all_objfiles (current_program_space
))
478 if (iterate_over_some_symtabs (name
, real_path
.get (),
479 objfile
->compunit_symtabs
, NULL
,
484 /* Same search rules as above apply here, but now we look thru the
487 for (objfile
*objfile
: all_objfiles (current_program_space
))
490 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
498 /* A wrapper for iterate_over_symtabs that returns the first matching
502 lookup_symtab (const char *name
)
504 struct symtab
*result
= NULL
;
506 iterate_over_symtabs (name
, [&] (symtab
*symtab
)
516 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
517 full method name, which consist of the class name (from T), the unadorned
518 method name from METHOD_ID, and the signature for the specific overload,
519 specified by SIGNATURE_ID. Note that this function is g++ specific. */
522 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
524 int mangled_name_len
;
526 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
527 struct fn_field
*method
= &f
[signature_id
];
528 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
529 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
530 const char *newname
= TYPE_NAME (type
);
532 /* Does the form of physname indicate that it is the full mangled name
533 of a constructor (not just the args)? */
534 int is_full_physname_constructor
;
537 int is_destructor
= is_destructor_name (physname
);
538 /* Need a new type prefix. */
539 const char *const_prefix
= method
->is_const
? "C" : "";
540 const char *volatile_prefix
= method
->is_volatile
? "V" : "";
542 int len
= (newname
== NULL
? 0 : strlen (newname
));
544 /* Nothing to do if physname already contains a fully mangled v3 abi name
545 or an operator name. */
546 if ((physname
[0] == '_' && physname
[1] == 'Z')
547 || is_operator_name (field_name
))
548 return xstrdup (physname
);
550 is_full_physname_constructor
= is_constructor_name (physname
);
552 is_constructor
= is_full_physname_constructor
553 || (newname
&& strcmp (field_name
, newname
) == 0);
556 is_destructor
= (startswith (physname
, "__dt"));
558 if (is_destructor
|| is_full_physname_constructor
)
560 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
561 strcpy (mangled_name
, physname
);
567 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
569 else if (physname
[0] == 't' || physname
[0] == 'Q')
571 /* The physname for template and qualified methods already includes
573 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
579 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
580 volatile_prefix
, len
);
582 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
583 + strlen (buf
) + len
+ strlen (physname
) + 1);
585 mangled_name
= (char *) xmalloc (mangled_name_len
);
587 mangled_name
[0] = '\0';
589 strcpy (mangled_name
, field_name
);
591 strcat (mangled_name
, buf
);
592 /* If the class doesn't have a name, i.e. newname NULL, then we just
593 mangle it using 0 for the length of the class. Thus it gets mangled
594 as something starting with `::' rather than `classname::'. */
596 strcat (mangled_name
, newname
);
598 strcat (mangled_name
, physname
);
599 return (mangled_name
);
602 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
603 correctly allocated. */
606 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
608 struct obstack
*obstack
)
610 if (gsymbol
->language
== language_ada
)
614 gsymbol
->ada_mangled
= 0;
615 gsymbol
->language_specific
.obstack
= obstack
;
619 gsymbol
->ada_mangled
= 1;
620 gsymbol
->language_specific
.demangled_name
= name
;
624 gsymbol
->language_specific
.demangled_name
= name
;
627 /* Return the demangled name of GSYMBOL. */
630 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
632 if (gsymbol
->language
== language_ada
)
634 if (!gsymbol
->ada_mangled
)
639 return gsymbol
->language_specific
.demangled_name
;
643 /* Initialize the language dependent portion of a symbol
644 depending upon the language for the symbol. */
647 symbol_set_language (struct general_symbol_info
*gsymbol
,
648 enum language language
,
649 struct obstack
*obstack
)
651 gsymbol
->language
= language
;
652 if (gsymbol
->language
== language_cplus
653 || gsymbol
->language
== language_d
654 || gsymbol
->language
== language_go
655 || gsymbol
->language
== language_objc
656 || gsymbol
->language
== language_fortran
)
658 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
660 else if (gsymbol
->language
== language_ada
)
662 gdb_assert (gsymbol
->ada_mangled
== 0);
663 gsymbol
->language_specific
.obstack
= obstack
;
667 memset (&gsymbol
->language_specific
, 0,
668 sizeof (gsymbol
->language_specific
));
672 /* Functions to initialize a symbol's mangled name. */
674 /* Objects of this type are stored in the demangled name hash table. */
675 struct demangled_name_entry
681 /* Hash function for the demangled name hash. */
684 hash_demangled_name_entry (const void *data
)
686 const struct demangled_name_entry
*e
687 = (const struct demangled_name_entry
*) data
;
689 return htab_hash_string (e
->mangled
);
692 /* Equality function for the demangled name hash. */
695 eq_demangled_name_entry (const void *a
, const void *b
)
697 const struct demangled_name_entry
*da
698 = (const struct demangled_name_entry
*) a
;
699 const struct demangled_name_entry
*db
700 = (const struct demangled_name_entry
*) b
;
702 return strcmp (da
->mangled
, db
->mangled
) == 0;
705 /* Create the hash table used for demangled names. Each hash entry is
706 a pair of strings; one for the mangled name and one for the demangled
707 name. The entry is hashed via just the mangled name. */
710 create_demangled_names_hash (struct objfile
*objfile
)
712 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
713 The hash table code will round this up to the next prime number.
714 Choosing a much larger table size wastes memory, and saves only about
715 1% in symbol reading. */
717 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
718 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
719 NULL
, xcalloc
, xfree
);
722 /* Try to determine the demangled name for a symbol, based on the
723 language of that symbol. If the language is set to language_auto,
724 it will attempt to find any demangling algorithm that works and
725 then set the language appropriately. The returned name is allocated
726 by the demangler and should be xfree'd. */
729 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
732 char *demangled
= NULL
;
735 if (gsymbol
->language
== language_unknown
)
736 gsymbol
->language
= language_auto
;
738 if (gsymbol
->language
!= language_auto
)
740 const struct language_defn
*lang
= language_def (gsymbol
->language
);
742 language_sniff_from_mangled_name (lang
, mangled
, &demangled
);
746 for (i
= language_unknown
; i
< nr_languages
; ++i
)
748 enum language l
= (enum language
) i
;
749 const struct language_defn
*lang
= language_def (l
);
751 if (language_sniff_from_mangled_name (lang
, mangled
, &demangled
))
753 gsymbol
->language
= l
;
761 /* Set both the mangled and demangled (if any) names for GSYMBOL based
762 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
763 objfile's obstack; but if COPY_NAME is 0 and if NAME is
764 NUL-terminated, then this function assumes that NAME is already
765 correctly saved (either permanently or with a lifetime tied to the
766 objfile), and it will not be copied.
768 The hash table corresponding to OBJFILE is used, and the memory
769 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
770 so the pointer can be discarded after calling this function. */
773 symbol_set_names (struct general_symbol_info
*gsymbol
,
774 const char *linkage_name
, int len
, int copy_name
,
775 struct objfile
*objfile
)
777 struct demangled_name_entry
**slot
;
778 /* A 0-terminated copy of the linkage name. */
779 const char *linkage_name_copy
;
780 struct demangled_name_entry entry
;
781 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
783 if (gsymbol
->language
== language_ada
)
785 /* In Ada, we do the symbol lookups using the mangled name, so
786 we can save some space by not storing the demangled name. */
788 gsymbol
->name
= linkage_name
;
791 char *name
= (char *) obstack_alloc (&per_bfd
->storage_obstack
,
794 memcpy (name
, linkage_name
, len
);
796 gsymbol
->name
= name
;
798 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
803 if (per_bfd
->demangled_names_hash
== NULL
)
804 create_demangled_names_hash (objfile
);
806 if (linkage_name
[len
] != '\0')
810 alloc_name
= (char *) alloca (len
+ 1);
811 memcpy (alloc_name
, linkage_name
, len
);
812 alloc_name
[len
] = '\0';
814 linkage_name_copy
= alloc_name
;
817 linkage_name_copy
= linkage_name
;
819 /* Set the symbol language. */
820 char *demangled_name_ptr
821 = symbol_find_demangled_name (gsymbol
, linkage_name_copy
);
822 gdb::unique_xmalloc_ptr
<char> demangled_name (demangled_name_ptr
);
824 entry
.mangled
= linkage_name_copy
;
825 slot
= ((struct demangled_name_entry
**)
826 htab_find_slot (per_bfd
->demangled_names_hash
,
829 /* If this name is not in the hash table, add it. */
831 /* A C version of the symbol may have already snuck into the table.
832 This happens to, e.g., main.init (__go_init_main). Cope. */
833 || (gsymbol
->language
== language_go
834 && (*slot
)->demangled
[0] == '\0'))
836 int demangled_len
= demangled_name
? strlen (demangled_name
.get ()) : 0;
838 /* Suppose we have demangled_name==NULL, copy_name==0, and
839 linkage_name_copy==linkage_name. In this case, we already have the
840 mangled name saved, and we don't have a demangled name. So,
841 you might think we could save a little space by not recording
842 this in the hash table at all.
844 It turns out that it is actually important to still save such
845 an entry in the hash table, because storing this name gives
846 us better bcache hit rates for partial symbols. */
847 if (!copy_name
&& linkage_name_copy
== linkage_name
)
850 = ((struct demangled_name_entry
*)
851 obstack_alloc (&per_bfd
->storage_obstack
,
852 offsetof (struct demangled_name_entry
, demangled
)
853 + demangled_len
+ 1));
854 (*slot
)->mangled
= linkage_name
;
860 /* If we must copy the mangled name, put it directly after
861 the demangled name so we can have a single
864 = ((struct demangled_name_entry
*)
865 obstack_alloc (&per_bfd
->storage_obstack
,
866 offsetof (struct demangled_name_entry
, demangled
)
867 + len
+ demangled_len
+ 2));
868 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
869 strcpy (mangled_ptr
, linkage_name_copy
);
870 (*slot
)->mangled
= mangled_ptr
;
873 if (demangled_name
!= NULL
)
874 strcpy ((*slot
)->demangled
, demangled_name
.get());
876 (*slot
)->demangled
[0] = '\0';
879 gsymbol
->name
= (*slot
)->mangled
;
880 if ((*slot
)->demangled
[0] != '\0')
881 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
882 &per_bfd
->storage_obstack
);
884 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
887 /* Return the source code name of a symbol. In languages where
888 demangling is necessary, this is the demangled name. */
891 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
893 switch (gsymbol
->language
)
899 case language_fortran
:
900 if (symbol_get_demangled_name (gsymbol
) != NULL
)
901 return symbol_get_demangled_name (gsymbol
);
904 return ada_decode_symbol (gsymbol
);
908 return gsymbol
->name
;
911 /* Return the demangled name for a symbol based on the language for
912 that symbol. If no demangled name exists, return NULL. */
915 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
917 const char *dem_name
= NULL
;
919 switch (gsymbol
->language
)
925 case language_fortran
:
926 dem_name
= symbol_get_demangled_name (gsymbol
);
929 dem_name
= ada_decode_symbol (gsymbol
);
937 /* Return the search name of a symbol---generally the demangled or
938 linkage name of the symbol, depending on how it will be searched for.
939 If there is no distinct demangled name, then returns the same value
940 (same pointer) as SYMBOL_LINKAGE_NAME. */
943 symbol_search_name (const struct general_symbol_info
*gsymbol
)
945 if (gsymbol
->language
== language_ada
)
946 return gsymbol
->name
;
948 return symbol_natural_name (gsymbol
);
954 symbol_matches_search_name (const struct general_symbol_info
*gsymbol
,
955 const lookup_name_info
&name
)
957 symbol_name_matcher_ftype
*name_match
958 = get_symbol_name_matcher (language_def (gsymbol
->language
), name
);
959 return name_match (symbol_search_name (gsymbol
), name
, NULL
);
964 /* Return 1 if the two sections are the same, or if they could
965 plausibly be copies of each other, one in an original object
966 file and another in a separated debug file. */
969 matching_obj_sections (struct obj_section
*obj_first
,
970 struct obj_section
*obj_second
)
972 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
973 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
976 /* If they're the same section, then they match. */
980 /* If either is NULL, give up. */
981 if (first
== NULL
|| second
== NULL
)
984 /* This doesn't apply to absolute symbols. */
985 if (first
->owner
== NULL
|| second
->owner
== NULL
)
988 /* If they're in the same object file, they must be different sections. */
989 if (first
->owner
== second
->owner
)
992 /* Check whether the two sections are potentially corresponding. They must
993 have the same size, address, and name. We can't compare section indexes,
994 which would be more reliable, because some sections may have been
996 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
999 /* In-memory addresses may start at a different offset, relativize them. */
1000 if (bfd_get_section_vma (first
->owner
, first
)
1001 - bfd_get_start_address (first
->owner
)
1002 != bfd_get_section_vma (second
->owner
, second
)
1003 - bfd_get_start_address (second
->owner
))
1006 if (bfd_get_section_name (first
->owner
, first
) == NULL
1007 || bfd_get_section_name (second
->owner
, second
) == NULL
1008 || strcmp (bfd_get_section_name (first
->owner
, first
),
1009 bfd_get_section_name (second
->owner
, second
)) != 0)
1012 /* Otherwise check that they are in corresponding objfiles. */
1014 for (objfile
*objfile
: all_objfiles (current_program_space
))
1015 if (objfile
->obfd
== first
->owner
)
1020 gdb_assert (obj
!= NULL
);
1022 if (obj
->separate_debug_objfile
!= NULL
1023 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1025 if (obj
->separate_debug_objfile_backlink
!= NULL
1026 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1035 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1037 struct bound_minimal_symbol msymbol
;
1039 /* If we know that this is not a text address, return failure. This is
1040 necessary because we loop based on texthigh and textlow, which do
1041 not include the data ranges. */
1042 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1044 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1045 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1046 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1047 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1048 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1051 for (objfile
*objfile
: all_objfiles (current_program_space
))
1053 struct compunit_symtab
*cust
= NULL
;
1056 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1063 /* Hash function for the symbol cache. */
1066 hash_symbol_entry (const struct objfile
*objfile_context
,
1067 const char *name
, domain_enum domain
)
1069 unsigned int hash
= (uintptr_t) objfile_context
;
1072 hash
+= htab_hash_string (name
);
1074 /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
1075 to map to the same slot. */
1076 if (domain
== STRUCT_DOMAIN
)
1077 hash
+= VAR_DOMAIN
* 7;
1084 /* Equality function for the symbol cache. */
1087 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1088 const struct objfile
*objfile_context
,
1089 const char *name
, domain_enum domain
)
1091 const char *slot_name
;
1092 domain_enum slot_domain
;
1094 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1097 if (slot
->objfile_context
!= objfile_context
)
1100 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1102 slot_name
= slot
->value
.not_found
.name
;
1103 slot_domain
= slot
->value
.not_found
.domain
;
1107 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
.symbol
);
1108 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
.symbol
);
1111 /* NULL names match. */
1112 if (slot_name
== NULL
&& name
== NULL
)
1114 /* But there's no point in calling symbol_matches_domain in the
1115 SYMBOL_SLOT_FOUND case. */
1116 if (slot_domain
!= domain
)
1119 else if (slot_name
!= NULL
&& name
!= NULL
)
1121 /* It's important that we use the same comparison that was done
1122 the first time through. If the slot records a found symbol,
1123 then this means using the symbol name comparison function of
1124 the symbol's language with SYMBOL_SEARCH_NAME. See
1125 dictionary.c. It also means using symbol_matches_domain for
1126 found symbols. See block.c.
1128 If the slot records a not-found symbol, then require a precise match.
1129 We could still be lax with whitespace like strcmp_iw though. */
1131 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1133 if (strcmp (slot_name
, name
) != 0)
1135 if (slot_domain
!= domain
)
1140 struct symbol
*sym
= slot
->value
.found
.symbol
;
1141 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
1143 if (!SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
1146 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1147 slot_domain
, domain
))
1153 /* Only one name is NULL. */
1160 /* Given a cache of size SIZE, return the size of the struct (with variable
1161 length array) in bytes. */
1164 symbol_cache_byte_size (unsigned int size
)
1166 return (sizeof (struct block_symbol_cache
)
1167 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1173 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1175 /* If there's no change in size, don't do anything.
1176 All caches have the same size, so we can just compare with the size
1177 of the global symbols cache. */
1178 if ((cache
->global_symbols
!= NULL
1179 && cache
->global_symbols
->size
== new_size
)
1180 || (cache
->global_symbols
== NULL
1184 xfree (cache
->global_symbols
);
1185 xfree (cache
->static_symbols
);
1189 cache
->global_symbols
= NULL
;
1190 cache
->static_symbols
= NULL
;
1194 size_t total_size
= symbol_cache_byte_size (new_size
);
1196 cache
->global_symbols
1197 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1198 cache
->static_symbols
1199 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1200 cache
->global_symbols
->size
= new_size
;
1201 cache
->static_symbols
->size
= new_size
;
1205 /* Make a symbol cache of size SIZE. */
1207 static struct symbol_cache
*
1208 make_symbol_cache (unsigned int size
)
1210 struct symbol_cache
*cache
;
1212 cache
= XCNEW (struct symbol_cache
);
1213 resize_symbol_cache (cache
, symbol_cache_size
);
1217 /* Free the space used by CACHE. */
1220 free_symbol_cache (struct symbol_cache
*cache
)
1222 xfree (cache
->global_symbols
);
1223 xfree (cache
->static_symbols
);
1227 /* Return the symbol cache of PSPACE.
1228 Create one if it doesn't exist yet. */
1230 static struct symbol_cache
*
1231 get_symbol_cache (struct program_space
*pspace
)
1233 struct symbol_cache
*cache
1234 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1238 cache
= make_symbol_cache (symbol_cache_size
);
1239 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1245 /* Delete the symbol cache of PSPACE.
1246 Called when PSPACE is destroyed. */
1249 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1251 struct symbol_cache
*cache
= (struct symbol_cache
*) data
;
1253 free_symbol_cache (cache
);
1256 /* Set the size of the symbol cache in all program spaces. */
1259 set_symbol_cache_size (unsigned int new_size
)
1261 struct program_space
*pspace
;
1263 ALL_PSPACES (pspace
)
1265 struct symbol_cache
*cache
1266 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1268 /* The pspace could have been created but not have a cache yet. */
1270 resize_symbol_cache (cache
, new_size
);
1274 /* Called when symbol-cache-size is set. */
1277 set_symbol_cache_size_handler (const char *args
, int from_tty
,
1278 struct cmd_list_element
*c
)
1280 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1282 /* Restore the previous value.
1283 This is the value the "show" command prints. */
1284 new_symbol_cache_size
= symbol_cache_size
;
1286 error (_("Symbol cache size is too large, max is %u."),
1287 MAX_SYMBOL_CACHE_SIZE
);
1289 symbol_cache_size
= new_symbol_cache_size
;
1291 set_symbol_cache_size (symbol_cache_size
);
1294 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1295 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1296 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1297 failed (and thus this one will too), or NULL if the symbol is not present
1299 If the symbol is not present in the cache, then *BSC_PTR and *SLOT_PTR are
1300 set to the cache and slot of the symbol to save the result of a full lookup
1303 static struct block_symbol
1304 symbol_cache_lookup (struct symbol_cache
*cache
,
1305 struct objfile
*objfile_context
, int block
,
1306 const char *name
, domain_enum domain
,
1307 struct block_symbol_cache
**bsc_ptr
,
1308 struct symbol_cache_slot
**slot_ptr
)
1310 struct block_symbol_cache
*bsc
;
1312 struct symbol_cache_slot
*slot
;
1314 if (block
== GLOBAL_BLOCK
)
1315 bsc
= cache
->global_symbols
;
1317 bsc
= cache
->static_symbols
;
1322 return (struct block_symbol
) {NULL
, NULL
};
1325 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1326 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1328 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1330 if (symbol_lookup_debug
)
1331 fprintf_unfiltered (gdb_stdlog
,
1332 "%s block symbol cache hit%s for %s, %s\n",
1333 block
== GLOBAL_BLOCK
? "Global" : "Static",
1334 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1335 ? " (not found)" : "",
1336 name
, domain_name (domain
));
1338 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1339 return SYMBOL_LOOKUP_FAILED
;
1340 return slot
->value
.found
;
1343 /* Symbol is not present in the cache. */
1348 if (symbol_lookup_debug
)
1350 fprintf_unfiltered (gdb_stdlog
,
1351 "%s block symbol cache miss for %s, %s\n",
1352 block
== GLOBAL_BLOCK
? "Global" : "Static",
1353 name
, domain_name (domain
));
1356 return (struct block_symbol
) {NULL
, NULL
};
1359 /* Clear out SLOT. */
1362 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1364 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1365 xfree (slot
->value
.not_found
.name
);
1366 slot
->state
= SYMBOL_SLOT_UNUSED
;
1369 /* Mark SYMBOL as found in SLOT.
1370 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1371 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1372 necessarily the objfile the symbol was found in. */
1375 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1376 struct symbol_cache_slot
*slot
,
1377 struct objfile
*objfile_context
,
1378 struct symbol
*symbol
,
1379 const struct block
*block
)
1383 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1386 symbol_cache_clear_slot (slot
);
1388 slot
->state
= SYMBOL_SLOT_FOUND
;
1389 slot
->objfile_context
= objfile_context
;
1390 slot
->value
.found
.symbol
= symbol
;
1391 slot
->value
.found
.block
= block
;
1394 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1395 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1396 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1399 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1400 struct symbol_cache_slot
*slot
,
1401 struct objfile
*objfile_context
,
1402 const char *name
, domain_enum domain
)
1406 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1409 symbol_cache_clear_slot (slot
);
1411 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1412 slot
->objfile_context
= objfile_context
;
1413 slot
->value
.not_found
.name
= xstrdup (name
);
1414 slot
->value
.not_found
.domain
= domain
;
1417 /* Flush the symbol cache of PSPACE. */
1420 symbol_cache_flush (struct program_space
*pspace
)
1422 struct symbol_cache
*cache
1423 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
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. */
1538 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1540 printf_filtered (" <empty>\n");
1542 symbol_cache_dump (cache
);
1546 /* The "mt flush-symbol-cache" command. */
1549 maintenance_flush_symbol_cache (const char *args
, int from_tty
)
1551 struct program_space
*pspace
;
1553 ALL_PSPACES (pspace
)
1555 symbol_cache_flush (pspace
);
1559 /* Print usage statistics of CACHE. */
1562 symbol_cache_stats (struct symbol_cache
*cache
)
1566 if (cache
->global_symbols
== NULL
)
1568 printf_filtered (" <disabled>\n");
1572 for (pass
= 0; pass
< 2; ++pass
)
1574 const struct block_symbol_cache
*bsc
1575 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1580 printf_filtered ("Global block cache stats:\n");
1582 printf_filtered ("Static block cache stats:\n");
1584 printf_filtered (" size: %u\n", bsc
->size
);
1585 printf_filtered (" hits: %u\n", bsc
->hits
);
1586 printf_filtered (" misses: %u\n", bsc
->misses
);
1587 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1591 /* The "mt print symbol-cache-statistics" command. */
1594 maintenance_print_symbol_cache_statistics (const char *args
, int from_tty
)
1596 struct program_space
*pspace
;
1598 ALL_PSPACES (pspace
)
1600 struct symbol_cache
*cache
;
1602 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1604 pspace
->symfile_object_file
!= NULL
1605 ? objfile_name (pspace
->symfile_object_file
)
1606 : "(no object file)");
1608 /* If the cache hasn't been created yet, avoid creating one. */
1610 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1612 printf_filtered (" empty, no stats available\n");
1614 symbol_cache_stats (cache
);
1618 /* This module's 'new_objfile' observer. */
1621 symtab_new_objfile_observer (struct objfile
*objfile
)
1623 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1624 symbol_cache_flush (current_program_space
);
1627 /* This module's 'free_objfile' observer. */
1630 symtab_free_objfile_observer (struct objfile
*objfile
)
1632 symbol_cache_flush (objfile
->pspace
);
1635 /* Debug symbols usually don't have section information. We need to dig that
1636 out of the minimal symbols and stash that in the debug symbol. */
1639 fixup_section (struct general_symbol_info
*ginfo
,
1640 CORE_ADDR addr
, struct objfile
*objfile
)
1642 struct minimal_symbol
*msym
;
1644 /* First, check whether a minimal symbol with the same name exists
1645 and points to the same address. The address check is required
1646 e.g. on PowerPC64, where the minimal symbol for a function will
1647 point to the function descriptor, while the debug symbol will
1648 point to the actual function code. */
1649 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1651 ginfo
->section
= MSYMBOL_SECTION (msym
);
1654 /* Static, function-local variables do appear in the linker
1655 (minimal) symbols, but are frequently given names that won't
1656 be found via lookup_minimal_symbol(). E.g., it has been
1657 observed in frv-uclinux (ELF) executables that a static,
1658 function-local variable named "foo" might appear in the
1659 linker symbols as "foo.6" or "foo.3". Thus, there is no
1660 point in attempting to extend the lookup-by-name mechanism to
1661 handle this case due to the fact that there can be multiple
1664 So, instead, search the section table when lookup by name has
1665 failed. The ``addr'' and ``endaddr'' fields may have already
1666 been relocated. If so, the relocation offset (i.e. the
1667 ANOFFSET value) needs to be subtracted from these values when
1668 performing the comparison. We unconditionally subtract it,
1669 because, when no relocation has been performed, the ANOFFSET
1670 value will simply be zero.
1672 The address of the symbol whose section we're fixing up HAS
1673 NOT BEEN adjusted (relocated) yet. It can't have been since
1674 the section isn't yet known and knowing the section is
1675 necessary in order to add the correct relocation value. In
1676 other words, we wouldn't even be in this function (attempting
1677 to compute the section) if it were already known.
1679 Note that it is possible to search the minimal symbols
1680 (subtracting the relocation value if necessary) to find the
1681 matching minimal symbol, but this is overkill and much less
1682 efficient. It is not necessary to find the matching minimal
1683 symbol, only its section.
1685 Note that this technique (of doing a section table search)
1686 can fail when unrelocated section addresses overlap. For
1687 this reason, we still attempt a lookup by name prior to doing
1688 a search of the section table. */
1690 struct obj_section
*s
;
1693 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1695 int idx
= s
- objfile
->sections
;
1696 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1701 if (obj_section_addr (s
) - offset
<= addr
1702 && addr
< obj_section_endaddr (s
) - offset
)
1704 ginfo
->section
= idx
;
1709 /* If we didn't find the section, assume it is in the first
1710 section. If there is no allocated section, then it hardly
1711 matters what we pick, so just pick zero. */
1715 ginfo
->section
= fallback
;
1720 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1727 if (!SYMBOL_OBJFILE_OWNED (sym
))
1730 /* We either have an OBJFILE, or we can get at it from the sym's
1731 symtab. Anything else is a bug. */
1732 gdb_assert (objfile
|| symbol_symtab (sym
));
1734 if (objfile
== NULL
)
1735 objfile
= symbol_objfile (sym
);
1737 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1740 /* We should have an objfile by now. */
1741 gdb_assert (objfile
);
1743 switch (SYMBOL_CLASS (sym
))
1747 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1750 addr
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
));
1754 /* Nothing else will be listed in the minsyms -- no use looking
1759 fixup_section (&sym
->ginfo
, addr
, objfile
);
1766 demangle_for_lookup_info::demangle_for_lookup_info
1767 (const lookup_name_info
&lookup_name
, language lang
)
1769 demangle_result_storage storage
;
1771 if (lookup_name
.ignore_parameters () && lang
== language_cplus
)
1773 gdb::unique_xmalloc_ptr
<char> without_params
1774 = cp_remove_params_if_any (lookup_name
.name ().c_str (),
1775 lookup_name
.completion_mode ());
1777 if (without_params
!= NULL
)
1779 if (lookup_name
.match_type () != symbol_name_match_type::SEARCH_NAME
)
1780 m_demangled_name
= demangle_for_lookup (without_params
.get (),
1786 if (lookup_name
.match_type () == symbol_name_match_type::SEARCH_NAME
)
1787 m_demangled_name
= lookup_name
.name ();
1789 m_demangled_name
= demangle_for_lookup (lookup_name
.name ().c_str (),
1795 const lookup_name_info
&
1796 lookup_name_info::match_any ()
1798 /* Lookup any symbol that "" would complete. I.e., this matches all
1800 static const lookup_name_info
lookup_name ({}, symbol_name_match_type::FULL
,
1806 /* Compute the demangled form of NAME as used by the various symbol
1807 lookup functions. The result can either be the input NAME
1808 directly, or a pointer to a buffer owned by the STORAGE object.
1810 For Ada, this function just returns NAME, unmodified.
1811 Normally, Ada symbol lookups are performed using the encoded name
1812 rather than the demangled name, and so it might seem to make sense
1813 for this function to return an encoded version of NAME.
1814 Unfortunately, we cannot do this, because this function is used in
1815 circumstances where it is not appropriate to try to encode NAME.
1816 For instance, when displaying the frame info, we demangle the name
1817 of each parameter, and then perform a symbol lookup inside our
1818 function using that demangled name. In Ada, certain functions
1819 have internally-generated parameters whose name contain uppercase
1820 characters. Encoding those name would result in those uppercase
1821 characters to become lowercase, and thus cause the symbol lookup
1825 demangle_for_lookup (const char *name
, enum language lang
,
1826 demangle_result_storage
&storage
)
1828 /* If we are using C++, D, or Go, demangle the name before doing a
1829 lookup, so we can always binary search. */
1830 if (lang
== language_cplus
)
1832 char *demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1833 if (demangled_name
!= NULL
)
1834 return storage
.set_malloc_ptr (demangled_name
);
1836 /* If we were given a non-mangled name, canonicalize it
1837 according to the language (so far only for C++). */
1838 std::string canon
= cp_canonicalize_string (name
);
1839 if (!canon
.empty ())
1840 return storage
.swap_string (canon
);
1842 else if (lang
== language_d
)
1844 char *demangled_name
= d_demangle (name
, 0);
1845 if (demangled_name
!= NULL
)
1846 return storage
.set_malloc_ptr (demangled_name
);
1848 else if (lang
== language_go
)
1850 char *demangled_name
= go_demangle (name
, 0);
1851 if (demangled_name
!= NULL
)
1852 return storage
.set_malloc_ptr (demangled_name
);
1861 search_name_hash (enum language language
, const char *search_name
)
1863 return language_def (language
)->la_search_name_hash (search_name
);
1868 This function (or rather its subordinates) have a bunch of loops and
1869 it would seem to be attractive to put in some QUIT's (though I'm not really
1870 sure whether it can run long enough to be really important). But there
1871 are a few calls for which it would appear to be bad news to quit
1872 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1873 that there is C++ code below which can error(), but that probably
1874 doesn't affect these calls since they are looking for a known
1875 variable and thus can probably assume it will never hit the C++
1879 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1880 const domain_enum domain
, enum language lang
,
1881 struct field_of_this_result
*is_a_field_of_this
)
1883 demangle_result_storage storage
;
1884 const char *modified_name
= demangle_for_lookup (name
, lang
, storage
);
1886 return lookup_symbol_aux (modified_name
,
1887 symbol_name_match_type::FULL
,
1888 block
, domain
, lang
,
1889 is_a_field_of_this
);
1895 lookup_symbol (const char *name
, const struct block
*block
,
1897 struct field_of_this_result
*is_a_field_of_this
)
1899 return lookup_symbol_in_language (name
, block
, domain
,
1900 current_language
->la_language
,
1901 is_a_field_of_this
);
1907 lookup_symbol_search_name (const char *search_name
, const struct block
*block
,
1910 return lookup_symbol_aux (search_name
, symbol_name_match_type::SEARCH_NAME
,
1911 block
, domain
, language_asm
, NULL
);
1917 lookup_language_this (const struct language_defn
*lang
,
1918 const struct block
*block
)
1920 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1921 return (struct block_symbol
) {NULL
, NULL
};
1923 if (symbol_lookup_debug
> 1)
1925 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1927 fprintf_unfiltered (gdb_stdlog
,
1928 "lookup_language_this (%s, %s (objfile %s))",
1929 lang
->la_name
, host_address_to_string (block
),
1930 objfile_debug_name (objfile
));
1937 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
,
1938 symbol_name_match_type::SEARCH_NAME
,
1942 if (symbol_lookup_debug
> 1)
1944 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1945 SYMBOL_PRINT_NAME (sym
),
1946 host_address_to_string (sym
),
1947 host_address_to_string (block
));
1949 return (struct block_symbol
) {sym
, block
};
1951 if (BLOCK_FUNCTION (block
))
1953 block
= BLOCK_SUPERBLOCK (block
);
1956 if (symbol_lookup_debug
> 1)
1957 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
1958 return (struct block_symbol
) {NULL
, NULL
};
1961 /* Given TYPE, a structure/union,
1962 return 1 if the component named NAME from the ultimate target
1963 structure/union is defined, otherwise, return 0. */
1966 check_field (struct type
*type
, const char *name
,
1967 struct field_of_this_result
*is_a_field_of_this
)
1971 /* The type may be a stub. */
1972 type
= check_typedef (type
);
1974 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1976 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1978 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1980 is_a_field_of_this
->type
= type
;
1981 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1986 /* C++: If it was not found as a data field, then try to return it
1987 as a pointer to a method. */
1989 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1991 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1993 is_a_field_of_this
->type
= type
;
1994 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1999 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
2000 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
2006 /* Behave like lookup_symbol except that NAME is the natural name
2007 (e.g., demangled name) of the symbol that we're looking for. */
2009 static struct block_symbol
2010 lookup_symbol_aux (const char *name
, symbol_name_match_type match_type
,
2011 const struct block
*block
,
2012 const domain_enum domain
, enum language language
,
2013 struct field_of_this_result
*is_a_field_of_this
)
2015 struct block_symbol result
;
2016 const struct language_defn
*langdef
;
2018 if (symbol_lookup_debug
)
2020 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2022 fprintf_unfiltered (gdb_stdlog
,
2023 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2024 name
, host_address_to_string (block
),
2026 ? objfile_debug_name (objfile
) : "NULL",
2027 domain_name (domain
), language_str (language
));
2030 /* Make sure we do something sensible with is_a_field_of_this, since
2031 the callers that set this parameter to some non-null value will
2032 certainly use it later. If we don't set it, the contents of
2033 is_a_field_of_this are undefined. */
2034 if (is_a_field_of_this
!= NULL
)
2035 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
2037 /* Search specified block and its superiors. Don't search
2038 STATIC_BLOCK or GLOBAL_BLOCK. */
2040 result
= lookup_local_symbol (name
, match_type
, block
, domain
, language
);
2041 if (result
.symbol
!= NULL
)
2043 if (symbol_lookup_debug
)
2045 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2046 host_address_to_string (result
.symbol
));
2051 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2052 check to see if NAME is a field of `this'. */
2054 langdef
= language_def (language
);
2056 /* Don't do this check if we are searching for a struct. It will
2057 not be found by check_field, but will be found by other
2059 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
2061 result
= lookup_language_this (langdef
, block
);
2065 struct type
*t
= result
.symbol
->type
;
2067 /* I'm not really sure that type of this can ever
2068 be typedefed; just be safe. */
2069 t
= check_typedef (t
);
2070 if (TYPE_CODE (t
) == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (t
))
2071 t
= TYPE_TARGET_TYPE (t
);
2073 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
2074 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
2075 error (_("Internal error: `%s' is not an aggregate"),
2076 langdef
->la_name_of_this
);
2078 if (check_field (t
, name
, is_a_field_of_this
))
2080 if (symbol_lookup_debug
)
2082 fprintf_unfiltered (gdb_stdlog
,
2083 "lookup_symbol_aux (...) = NULL\n");
2085 return (struct block_symbol
) {NULL
, NULL
};
2090 /* Now do whatever is appropriate for LANGUAGE to look
2091 up static and global variables. */
2093 result
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2094 if (result
.symbol
!= NULL
)
2096 if (symbol_lookup_debug
)
2098 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2099 host_address_to_string (result
.symbol
));
2104 /* Now search all static file-level symbols. Not strictly correct,
2105 but more useful than an error. */
2107 result
= lookup_static_symbol (name
, domain
);
2108 if (symbol_lookup_debug
)
2110 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2111 result
.symbol
!= NULL
2112 ? host_address_to_string (result
.symbol
)
2118 /* Check to see if the symbol is defined in BLOCK or its superiors.
2119 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2121 static struct block_symbol
2122 lookup_local_symbol (const char *name
,
2123 symbol_name_match_type match_type
,
2124 const struct block
*block
,
2125 const domain_enum domain
,
2126 enum language language
)
2129 const struct block
*static_block
= block_static_block (block
);
2130 const char *scope
= block_scope (block
);
2132 /* Check if either no block is specified or it's a global block. */
2134 if (static_block
== NULL
)
2135 return (struct block_symbol
) {NULL
, NULL
};
2137 while (block
!= static_block
)
2139 sym
= lookup_symbol_in_block (name
, match_type
, block
, domain
);
2141 return (struct block_symbol
) {sym
, block
};
2143 if (language
== language_cplus
|| language
== language_fortran
)
2145 struct block_symbol blocksym
2146 = cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2149 if (blocksym
.symbol
!= NULL
)
2153 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2155 block
= BLOCK_SUPERBLOCK (block
);
2158 /* We've reached the end of the function without finding a result. */
2160 return (struct block_symbol
) {NULL
, NULL
};
2166 lookup_objfile_from_block (const struct block
*block
)
2171 block
= block_global_block (block
);
2172 /* Look through all blockvectors. */
2173 for (objfile
*obj
: all_objfiles (current_program_space
))
2175 for (compunit_symtab
*cust
: objfile_compunits (obj
))
2176 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2179 if (obj
->separate_debug_objfile_backlink
)
2180 obj
= obj
->separate_debug_objfile_backlink
;
2192 lookup_symbol_in_block (const char *name
, symbol_name_match_type match_type
,
2193 const struct block
*block
,
2194 const domain_enum domain
)
2198 if (symbol_lookup_debug
> 1)
2200 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2202 fprintf_unfiltered (gdb_stdlog
,
2203 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2204 name
, host_address_to_string (block
),
2205 objfile_debug_name (objfile
),
2206 domain_name (domain
));
2209 sym
= block_lookup_symbol (block
, name
, match_type
, domain
);
2212 if (symbol_lookup_debug
> 1)
2214 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2215 host_address_to_string (sym
));
2217 return fixup_symbol_section (sym
, NULL
);
2220 if (symbol_lookup_debug
> 1)
2221 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2228 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2230 const domain_enum domain
)
2232 struct objfile
*objfile
;
2234 for (objfile
= main_objfile
;
2236 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2238 struct block_symbol result
2239 = lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
, name
, domain
);
2241 if (result
.symbol
!= NULL
)
2245 return (struct block_symbol
) {NULL
, NULL
};
2248 /* Check to see if the symbol is defined in one of the OBJFILE's
2249 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2250 depending on whether or not we want to search global symbols or
2253 static struct block_symbol
2254 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2255 const char *name
, const domain_enum domain
)
2257 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2259 if (symbol_lookup_debug
> 1)
2261 fprintf_unfiltered (gdb_stdlog
,
2262 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2263 objfile_debug_name (objfile
),
2264 block_index
== GLOBAL_BLOCK
2265 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2266 name
, domain_name (domain
));
2269 for (compunit_symtab
*cust
: objfile_compunits (objfile
))
2271 const struct blockvector
*bv
;
2272 const struct block
*block
;
2273 struct block_symbol result
;
2275 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2276 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2277 result
.symbol
= block_lookup_symbol_primary (block
, name
, domain
);
2278 result
.block
= block
;
2279 if (result
.symbol
!= NULL
)
2281 if (symbol_lookup_debug
> 1)
2283 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2284 host_address_to_string (result
.symbol
),
2285 host_address_to_string (block
));
2287 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2293 if (symbol_lookup_debug
> 1)
2294 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2295 return (struct block_symbol
) {NULL
, NULL
};
2298 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2299 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2300 and all associated separate debug objfiles.
2302 Normally we only look in OBJFILE, and not any separate debug objfiles
2303 because the outer loop will cause them to be searched too. This case is
2304 different. Here we're called from search_symbols where it will only
2305 call us for the the objfile that contains a matching minsym. */
2307 static struct block_symbol
2308 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2309 const char *linkage_name
,
2312 enum language lang
= current_language
->la_language
;
2313 struct objfile
*main_objfile
, *cur_objfile
;
2315 demangle_result_storage storage
;
2316 const char *modified_name
= demangle_for_lookup (linkage_name
, lang
, storage
);
2318 if (objfile
->separate_debug_objfile_backlink
)
2319 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2321 main_objfile
= objfile
;
2323 for (cur_objfile
= main_objfile
;
2325 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2327 struct block_symbol result
;
2329 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2330 modified_name
, domain
);
2331 if (result
.symbol
== NULL
)
2332 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2333 modified_name
, domain
);
2334 if (result
.symbol
!= NULL
)
2338 return (struct block_symbol
) {NULL
, NULL
};
2341 /* A helper function that throws an exception when a symbol was found
2342 in a psymtab but not in a symtab. */
2344 static void ATTRIBUTE_NORETURN
2345 error_in_psymtab_expansion (int block_index
, const char *name
,
2346 struct compunit_symtab
*cust
)
2349 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2350 %s may be an inlined function, or may be a template function\n \
2351 (if a template, try specifying an instantiation: %s<type>)."),
2352 block_index
== GLOBAL_BLOCK
? "global" : "static",
2354 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2358 /* A helper function for various lookup routines that interfaces with
2359 the "quick" symbol table functions. */
2361 static struct block_symbol
2362 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2363 const char *name
, const domain_enum domain
)
2365 struct compunit_symtab
*cust
;
2366 const struct blockvector
*bv
;
2367 const struct block
*block
;
2368 struct block_symbol result
;
2371 return (struct block_symbol
) {NULL
, NULL
};
2373 if (symbol_lookup_debug
> 1)
2375 fprintf_unfiltered (gdb_stdlog
,
2376 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2377 objfile_debug_name (objfile
),
2378 block_index
== GLOBAL_BLOCK
2379 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2380 name
, domain_name (domain
));
2383 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2386 if (symbol_lookup_debug
> 1)
2388 fprintf_unfiltered (gdb_stdlog
,
2389 "lookup_symbol_via_quick_fns (...) = NULL\n");
2391 return (struct block_symbol
) {NULL
, NULL
};
2394 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2395 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2396 result
.symbol
= block_lookup_symbol (block
, name
,
2397 symbol_name_match_type::FULL
, domain
);
2398 if (result
.symbol
== NULL
)
2399 error_in_psymtab_expansion (block_index
, name
, cust
);
2401 if (symbol_lookup_debug
> 1)
2403 fprintf_unfiltered (gdb_stdlog
,
2404 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2405 host_address_to_string (result
.symbol
),
2406 host_address_to_string (block
));
2409 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2410 result
.block
= block
;
2417 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2419 const struct block
*block
,
2420 const domain_enum domain
)
2422 struct block_symbol result
;
2424 /* NOTE: carlton/2003-05-19: The comments below were written when
2425 this (or what turned into this) was part of lookup_symbol_aux;
2426 I'm much less worried about these questions now, since these
2427 decisions have turned out well, but I leave these comments here
2430 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2431 not it would be appropriate to search the current global block
2432 here as well. (That's what this code used to do before the
2433 is_a_field_of_this check was moved up.) On the one hand, it's
2434 redundant with the lookup in all objfiles search that happens
2435 next. On the other hand, if decode_line_1 is passed an argument
2436 like filename:var, then the user presumably wants 'var' to be
2437 searched for in filename. On the third hand, there shouldn't be
2438 multiple global variables all of which are named 'var', and it's
2439 not like decode_line_1 has ever restricted its search to only
2440 global variables in a single filename. All in all, only
2441 searching the static block here seems best: it's correct and it's
2444 /* NOTE: carlton/2002-12-05: There's also a possible performance
2445 issue here: if you usually search for global symbols in the
2446 current file, then it would be slightly better to search the
2447 current global block before searching all the symtabs. But there
2448 are other factors that have a much greater effect on performance
2449 than that one, so I don't think we should worry about that for
2452 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2453 the current objfile. Searching the current objfile first is useful
2454 for both matching user expectations as well as performance. */
2456 result
= lookup_symbol_in_static_block (name
, block
, domain
);
2457 if (result
.symbol
!= NULL
)
2460 /* If we didn't find a definition for a builtin type in the static block,
2461 search for it now. This is actually the right thing to do and can be
2462 a massive performance win. E.g., when debugging a program with lots of
2463 shared libraries we could search all of them only to find out the
2464 builtin type isn't defined in any of them. This is common for types
2466 if (domain
== VAR_DOMAIN
)
2468 struct gdbarch
*gdbarch
;
2471 gdbarch
= target_gdbarch ();
2473 gdbarch
= block_gdbarch (block
);
2474 result
.symbol
= language_lookup_primitive_type_as_symbol (langdef
,
2476 result
.block
= NULL
;
2477 if (result
.symbol
!= NULL
)
2481 return lookup_global_symbol (name
, block
, domain
);
2487 lookup_symbol_in_static_block (const char *name
,
2488 const struct block
*block
,
2489 const domain_enum domain
)
2491 const struct block
*static_block
= block_static_block (block
);
2494 if (static_block
== NULL
)
2495 return (struct block_symbol
) {NULL
, NULL
};
2497 if (symbol_lookup_debug
)
2499 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2501 fprintf_unfiltered (gdb_stdlog
,
2502 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2505 host_address_to_string (block
),
2506 objfile_debug_name (objfile
),
2507 domain_name (domain
));
2510 sym
= lookup_symbol_in_block (name
,
2511 symbol_name_match_type::FULL
,
2512 static_block
, domain
);
2513 if (symbol_lookup_debug
)
2515 fprintf_unfiltered (gdb_stdlog
,
2516 "lookup_symbol_in_static_block (...) = %s\n",
2517 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2519 return (struct block_symbol
) {sym
, static_block
};
2522 /* Perform the standard symbol lookup of NAME in OBJFILE:
2523 1) First search expanded symtabs, and if not found
2524 2) Search the "quick" symtabs (partial or .gdb_index).
2525 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2527 static struct block_symbol
2528 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2529 const char *name
, const domain_enum domain
)
2531 struct block_symbol result
;
2533 if (symbol_lookup_debug
)
2535 fprintf_unfiltered (gdb_stdlog
,
2536 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2537 objfile_debug_name (objfile
),
2538 block_index
== GLOBAL_BLOCK
2539 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2540 name
, domain_name (domain
));
2543 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2545 if (result
.symbol
!= NULL
)
2547 if (symbol_lookup_debug
)
2549 fprintf_unfiltered (gdb_stdlog
,
2550 "lookup_symbol_in_objfile (...) = %s"
2552 host_address_to_string (result
.symbol
));
2557 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2559 if (symbol_lookup_debug
)
2561 fprintf_unfiltered (gdb_stdlog
,
2562 "lookup_symbol_in_objfile (...) = %s%s\n",
2563 result
.symbol
!= NULL
2564 ? host_address_to_string (result
.symbol
)
2566 result
.symbol
!= NULL
? " (via quick fns)" : "");
2574 lookup_static_symbol (const char *name
, const domain_enum domain
)
2576 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2577 struct block_symbol result
;
2578 struct block_symbol_cache
*bsc
;
2579 struct symbol_cache_slot
*slot
;
2581 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2582 NULL for OBJFILE_CONTEXT. */
2583 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2585 if (result
.symbol
!= NULL
)
2587 if (SYMBOL_LOOKUP_FAILED_P (result
))
2588 return (struct block_symbol
) {NULL
, NULL
};
2592 for (objfile
*objfile
: all_objfiles (current_program_space
))
2594 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2595 if (result
.symbol
!= NULL
)
2597 /* Still pass NULL for OBJFILE_CONTEXT here. */
2598 symbol_cache_mark_found (bsc
, slot
, NULL
, result
.symbol
,
2604 /* Still pass NULL for OBJFILE_CONTEXT here. */
2605 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2606 return (struct block_symbol
) {NULL
, NULL
};
2609 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2611 struct global_sym_lookup_data
2613 /* The name of the symbol we are searching for. */
2616 /* The domain to use for our search. */
2619 /* The field where the callback should store the symbol if found.
2620 It should be initialized to {NULL, NULL} before the search is started. */
2621 struct block_symbol result
;
2624 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2625 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2626 OBJFILE. The arguments for the search are passed via CB_DATA,
2627 which in reality is a pointer to struct global_sym_lookup_data. */
2630 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2633 struct global_sym_lookup_data
*data
=
2634 (struct global_sym_lookup_data
*) cb_data
;
2636 gdb_assert (data
->result
.symbol
== NULL
2637 && data
->result
.block
== NULL
);
2639 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2640 data
->name
, data
->domain
);
2642 /* If we found a match, tell the iterator to stop. Otherwise,
2644 return (data
->result
.symbol
!= NULL
);
2650 lookup_global_symbol (const char *name
,
2651 const struct block
*block
,
2652 const domain_enum domain
)
2654 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2655 struct block_symbol result
;
2656 struct objfile
*objfile
;
2657 struct global_sym_lookup_data lookup_data
;
2658 struct block_symbol_cache
*bsc
;
2659 struct symbol_cache_slot
*slot
;
2661 objfile
= lookup_objfile_from_block (block
);
2663 /* First see if we can find the symbol in the cache.
2664 This works because we use the current objfile to qualify the lookup. */
2665 result
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2667 if (result
.symbol
!= NULL
)
2669 if (SYMBOL_LOOKUP_FAILED_P (result
))
2670 return (struct block_symbol
) {NULL
, NULL
};
2674 /* Call library-specific lookup procedure. */
2675 if (objfile
!= NULL
)
2676 result
= solib_global_lookup (objfile
, name
, domain
);
2678 /* If that didn't work go a global search (of global blocks, heh). */
2679 if (result
.symbol
== NULL
)
2681 memset (&lookup_data
, 0, sizeof (lookup_data
));
2682 lookup_data
.name
= name
;
2683 lookup_data
.domain
= domain
;
2684 gdbarch_iterate_over_objfiles_in_search_order
2685 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2686 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2687 result
= lookup_data
.result
;
2690 if (result
.symbol
!= NULL
)
2691 symbol_cache_mark_found (bsc
, slot
, objfile
, result
.symbol
, result
.block
);
2693 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2699 symbol_matches_domain (enum language symbol_language
,
2700 domain_enum symbol_domain
,
2703 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2704 Similarly, any Ada type declaration implicitly defines a typedef. */
2705 if (symbol_language
== language_cplus
2706 || symbol_language
== language_d
2707 || symbol_language
== language_ada
2708 || symbol_language
== language_rust
)
2710 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2711 && symbol_domain
== STRUCT_DOMAIN
)
2714 /* For all other languages, strict match is required. */
2715 return (symbol_domain
== domain
);
2721 lookup_transparent_type (const char *name
)
2723 return current_language
->la_lookup_transparent_type (name
);
2726 /* A helper for basic_lookup_transparent_type that interfaces with the
2727 "quick" symbol table functions. */
2729 static struct type
*
2730 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2733 struct compunit_symtab
*cust
;
2734 const struct blockvector
*bv
;
2735 struct block
*block
;
2740 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2745 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2746 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2747 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2748 block_find_non_opaque_type
, NULL
);
2750 error_in_psymtab_expansion (block_index
, name
, cust
);
2751 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2752 return SYMBOL_TYPE (sym
);
2755 /* Subroutine of basic_lookup_transparent_type to simplify it.
2756 Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
2757 BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */
2759 static struct type
*
2760 basic_lookup_transparent_type_1 (struct objfile
*objfile
, int block_index
,
2763 const struct blockvector
*bv
;
2764 const struct block
*block
;
2765 const struct symbol
*sym
;
2767 for (compunit_symtab
*cust
: objfile_compunits (objfile
))
2769 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2770 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2771 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2772 block_find_non_opaque_type
, NULL
);
2775 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2776 return SYMBOL_TYPE (sym
);
2783 /* The standard implementation of lookup_transparent_type. This code
2784 was modeled on lookup_symbol -- the parts not relevant to looking
2785 up types were just left out. In particular it's assumed here that
2786 types are available in STRUCT_DOMAIN and only in file-static or
2790 basic_lookup_transparent_type (const char *name
)
2794 /* Now search all the global symbols. Do the symtab's first, then
2795 check the psymtab's. If a psymtab indicates the existence
2796 of the desired name as a global, then do psymtab-to-symtab
2797 conversion on the fly and return the found symbol. */
2799 for (objfile
*objfile
: all_objfiles (current_program_space
))
2801 t
= basic_lookup_transparent_type_1 (objfile
, GLOBAL_BLOCK
, name
);
2806 for (objfile
*objfile
: all_objfiles (current_program_space
))
2808 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2813 /* Now search the static file-level symbols.
2814 Not strictly correct, but more useful than an error.
2815 Do the symtab's first, then
2816 check the psymtab's. If a psymtab indicates the existence
2817 of the desired name as a file-level static, then do psymtab-to-symtab
2818 conversion on the fly and return the found symbol. */
2820 for (objfile
*objfile
: all_objfiles (current_program_space
))
2822 t
= basic_lookup_transparent_type_1 (objfile
, STATIC_BLOCK
, name
);
2827 for (objfile
*objfile
: all_objfiles (current_program_space
))
2829 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2834 return (struct type
*) 0;
2837 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2839 For each symbol that matches, CALLBACK is called. The symbol is
2840 passed to the callback.
2842 If CALLBACK returns false, the iteration ends. Otherwise, the
2843 search continues. */
2846 iterate_over_symbols (const struct block
*block
,
2847 const lookup_name_info
&name
,
2848 const domain_enum domain
,
2849 gdb::function_view
<symbol_found_callback_ftype
> callback
)
2851 struct block_iterator iter
;
2854 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2856 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2857 SYMBOL_DOMAIN (sym
), domain
))
2859 struct block_symbol block_sym
= {sym
, block
};
2861 if (!callback (&block_sym
))
2867 /* Find the compunit symtab associated with PC and SECTION.
2868 This will read in debug info as necessary. */
2870 struct compunit_symtab
*
2871 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2873 struct compunit_symtab
*best_cust
= NULL
;
2874 CORE_ADDR distance
= 0;
2875 struct bound_minimal_symbol msymbol
;
2877 /* If we know that this is not a text address, return failure. This is
2878 necessary because we loop based on the block's high and low code
2879 addresses, which do not include the data ranges, and because
2880 we call find_pc_sect_psymtab which has a similar restriction based
2881 on the partial_symtab's texthigh and textlow. */
2882 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2884 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2885 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2886 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2887 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2888 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2891 /* Search all symtabs for the one whose file contains our address, and which
2892 is the smallest of all the ones containing the address. This is designed
2893 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2894 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2895 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2897 This happens for native ecoff format, where code from included files
2898 gets its own symtab. The symtab for the included file should have
2899 been read in already via the dependency mechanism.
2900 It might be swifter to create several symtabs with the same name
2901 like xcoff does (I'm not sure).
2903 It also happens for objfiles that have their functions reordered.
2904 For these, the symtab we are looking for is not necessarily read in. */
2906 for (objfile
*obj_file
: all_objfiles (current_program_space
))
2908 for (compunit_symtab
*cust
: objfile_compunits (obj_file
))
2911 const struct blockvector
*bv
;
2913 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2914 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2916 if (BLOCK_START (b
) <= pc
2917 && BLOCK_END (b
) > pc
2919 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2921 /* For an objfile that has its functions reordered,
2922 find_pc_psymtab will find the proper partial symbol table
2923 and we simply return its corresponding symtab. */
2924 /* In order to better support objfiles that contain both
2925 stabs and coff debugging info, we continue on if a psymtab
2927 if ((obj_file
->flags
& OBJF_REORDERED
) && obj_file
->sf
)
2929 struct compunit_symtab
*result
;
2932 = obj_file
->sf
->qf
->find_pc_sect_compunit_symtab (obj_file
,
2942 struct block_iterator iter
;
2943 struct symbol
*sym
= NULL
;
2945 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2947 fixup_symbol_section (sym
, obj_file
);
2948 if (matching_obj_sections (SYMBOL_OBJ_SECTION (obj_file
,
2954 continue; /* No symbol in this symtab matches
2957 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2963 if (best_cust
!= NULL
)
2966 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2968 for (objfile
*objf
: all_objfiles (current_program_space
))
2970 struct compunit_symtab
*result
;
2974 result
= objf
->sf
->qf
->find_pc_sect_compunit_symtab (objf
,
2985 /* Find the compunit symtab associated with PC.
2986 This will read in debug info as necessary.
2987 Backward compatibility, no section. */
2989 struct compunit_symtab
*
2990 find_pc_compunit_symtab (CORE_ADDR pc
)
2992 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
2998 find_symbol_at_address (CORE_ADDR address
)
3000 for (objfile
*objfile
: all_objfiles (current_program_space
))
3002 if (objfile
->sf
== NULL
3003 || objfile
->sf
->qf
->find_compunit_symtab_by_address
== NULL
)
3006 struct compunit_symtab
*symtab
3007 = objfile
->sf
->qf
->find_compunit_symtab_by_address (objfile
, address
);
3010 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (symtab
);
3012 for (int i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; ++i
)
3014 struct block
*b
= BLOCKVECTOR_BLOCK (bv
, i
);
3015 struct block_iterator iter
;
3018 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3020 if (SYMBOL_CLASS (sym
) == LOC_STATIC
3021 && SYMBOL_VALUE_ADDRESS (sym
) == address
)
3033 /* Find the source file and line number for a given PC value and SECTION.
3034 Return a structure containing a symtab pointer, a line number,
3035 and a pc range for the entire source line.
3036 The value's .pc field is NOT the specified pc.
3037 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3038 use the line that ends there. Otherwise, in that case, the line
3039 that begins there is used. */
3041 /* The big complication here is that a line may start in one file, and end just
3042 before the start of another file. This usually occurs when you #include
3043 code in the middle of a subroutine. To properly find the end of a line's PC
3044 range, we must search all symtabs associated with this compilation unit, and
3045 find the one whose first PC is closer than that of the next line in this
3048 struct symtab_and_line
3049 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
3051 struct compunit_symtab
*cust
;
3052 struct linetable
*l
;
3054 struct linetable_entry
*item
;
3055 const struct blockvector
*bv
;
3056 struct bound_minimal_symbol msymbol
;
3058 /* Info on best line seen so far, and where it starts, and its file. */
3060 struct linetable_entry
*best
= NULL
;
3061 CORE_ADDR best_end
= 0;
3062 struct symtab
*best_symtab
= 0;
3064 /* Store here the first line number
3065 of a file which contains the line at the smallest pc after PC.
3066 If we don't find a line whose range contains PC,
3067 we will use a line one less than this,
3068 with a range from the start of that file to the first line's pc. */
3069 struct linetable_entry
*alt
= NULL
;
3071 /* Info on best line seen in this file. */
3073 struct linetable_entry
*prev
;
3075 /* If this pc is not from the current frame,
3076 it is the address of the end of a call instruction.
3077 Quite likely that is the start of the following statement.
3078 But what we want is the statement containing the instruction.
3079 Fudge the pc to make sure we get that. */
3081 /* It's tempting to assume that, if we can't find debugging info for
3082 any function enclosing PC, that we shouldn't search for line
3083 number info, either. However, GAS can emit line number info for
3084 assembly files --- very helpful when debugging hand-written
3085 assembly code. In such a case, we'd have no debug info for the
3086 function, but we would have line info. */
3091 /* elz: added this because this function returned the wrong
3092 information if the pc belongs to a stub (import/export)
3093 to call a shlib function. This stub would be anywhere between
3094 two functions in the target, and the line info was erroneously
3095 taken to be the one of the line before the pc. */
3097 /* RT: Further explanation:
3099 * We have stubs (trampolines) inserted between procedures.
3101 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3102 * exists in the main image.
3104 * In the minimal symbol table, we have a bunch of symbols
3105 * sorted by start address. The stubs are marked as "trampoline",
3106 * the others appear as text. E.g.:
3108 * Minimal symbol table for main image
3109 * main: code for main (text symbol)
3110 * shr1: stub (trampoline symbol)
3111 * foo: code for foo (text symbol)
3113 * Minimal symbol table for "shr1" image:
3115 * shr1: code for shr1 (text symbol)
3118 * So the code below is trying to detect if we are in the stub
3119 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3120 * and if found, do the symbolization from the real-code address
3121 * rather than the stub address.
3123 * Assumptions being made about the minimal symbol table:
3124 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3125 * if we're really in the trampoline.s If we're beyond it (say
3126 * we're in "foo" in the above example), it'll have a closer
3127 * symbol (the "foo" text symbol for example) and will not
3128 * return the trampoline.
3129 * 2. lookup_minimal_symbol_text() will find a real text symbol
3130 * corresponding to the trampoline, and whose address will
3131 * be different than the trampoline address. I put in a sanity
3132 * check for the address being the same, to avoid an
3133 * infinite recursion.
3135 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3136 if (msymbol
.minsym
!= NULL
)
3137 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3139 struct bound_minimal_symbol mfunsym
3140 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3143 if (mfunsym
.minsym
== NULL
)
3144 /* I eliminated this warning since it is coming out
3145 * in the following situation:
3146 * gdb shmain // test program with shared libraries
3147 * (gdb) break shr1 // function in shared lib
3148 * Warning: In stub for ...
3149 * In the above situation, the shared lib is not loaded yet,
3150 * so of course we can't find the real func/line info,
3151 * but the "break" still works, and the warning is annoying.
3152 * So I commented out the warning. RT */
3153 /* warning ("In stub for %s; unable to find real function/line info",
3154 SYMBOL_LINKAGE_NAME (msymbol)); */
3157 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3158 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3159 /* Avoid infinite recursion */
3160 /* See above comment about why warning is commented out. */
3161 /* warning ("In stub for %s; unable to find real function/line info",
3162 SYMBOL_LINKAGE_NAME (msymbol)); */
3166 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3169 symtab_and_line val
;
3170 val
.pspace
= current_program_space
;
3172 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3175 /* If no symbol information, return previous pc. */
3182 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3184 /* Look at all the symtabs that share this blockvector.
3185 They all have the same apriori range, that we found was right;
3186 but they have different line tables. */
3188 for (symtab
*iter_s
: compunit_filetabs (cust
))
3190 /* Find the best line in this symtab. */
3191 l
= SYMTAB_LINETABLE (iter_s
);
3197 /* I think len can be zero if the symtab lacks line numbers
3198 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3199 I'm not sure which, and maybe it depends on the symbol
3205 item
= l
->item
; /* Get first line info. */
3207 /* Is this file's first line closer than the first lines of other files?
3208 If so, record this file, and its first line, as best alternate. */
3209 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3212 auto pc_compare
= [](const CORE_ADDR
& comp_pc
,
3213 const struct linetable_entry
& lhs
)->bool
3215 return comp_pc
< lhs
.pc
;
3218 struct linetable_entry
*first
= item
;
3219 struct linetable_entry
*last
= item
+ len
;
3220 item
= std::upper_bound (first
, last
, pc
, pc_compare
);
3222 prev
= item
- 1; /* Found a matching item. */
3224 /* At this point, prev points at the line whose start addr is <= pc, and
3225 item points at the next line. If we ran off the end of the linetable
3226 (pc >= start of the last line), then prev == item. If pc < start of
3227 the first line, prev will not be set. */
3229 /* Is this file's best line closer than the best in the other files?
3230 If so, record this file, and its best line, as best so far. Don't
3231 save prev if it represents the end of a function (i.e. line number
3232 0) instead of a real line. */
3234 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3237 best_symtab
= iter_s
;
3239 /* Discard BEST_END if it's before the PC of the current BEST. */
3240 if (best_end
<= best
->pc
)
3244 /* If another line (denoted by ITEM) is in the linetable and its
3245 PC is after BEST's PC, but before the current BEST_END, then
3246 use ITEM's PC as the new best_end. */
3247 if (best
&& item
< last
&& item
->pc
> best
->pc
3248 && (best_end
== 0 || best_end
> item
->pc
))
3249 best_end
= item
->pc
;
3254 /* If we didn't find any line number info, just return zeros.
3255 We used to return alt->line - 1 here, but that could be
3256 anywhere; if we don't have line number info for this PC,
3257 don't make some up. */
3260 else if (best
->line
== 0)
3262 /* If our best fit is in a range of PC's for which no line
3263 number info is available (line number is zero) then we didn't
3264 find any valid line information. */
3269 val
.symtab
= best_symtab
;
3270 val
.line
= best
->line
;
3272 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3277 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3279 val
.section
= section
;
3283 /* Backward compatibility (no section). */
3285 struct symtab_and_line
3286 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3288 struct obj_section
*section
;
3290 section
= find_pc_overlay (pc
);
3291 if (pc_in_unmapped_range (pc
, section
))
3292 pc
= overlay_mapped_address (pc
, section
);
3293 return find_pc_sect_line (pc
, section
, notcurrent
);
3299 find_pc_line_symtab (CORE_ADDR pc
)
3301 struct symtab_and_line sal
;
3303 /* This always passes zero for NOTCURRENT to find_pc_line.
3304 There are currently no callers that ever pass non-zero. */
3305 sal
= find_pc_line (pc
, 0);
3309 /* Find line number LINE in any symtab whose name is the same as
3312 If found, return the symtab that contains the linetable in which it was
3313 found, set *INDEX to the index in the linetable of the best entry
3314 found, and set *EXACT_MATCH nonzero if the value returned is an
3317 If not found, return NULL. */
3320 find_line_symtab (struct symtab
*sym_tab
, int line
,
3321 int *index
, int *exact_match
)
3323 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3325 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3329 struct linetable
*best_linetable
;
3330 struct symtab
*best_symtab
;
3332 /* First try looking it up in the given symtab. */
3333 best_linetable
= SYMTAB_LINETABLE (sym_tab
);
3334 best_symtab
= sym_tab
;
3335 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3336 if (best_index
< 0 || !exact
)
3338 /* Didn't find an exact match. So we better keep looking for
3339 another symtab with the same name. In the case of xcoff,
3340 multiple csects for one source file (produced by IBM's FORTRAN
3341 compiler) produce multiple symtabs (this is unavoidable
3342 assuming csects can be at arbitrary places in memory and that
3343 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3345 /* BEST is the smallest linenumber > LINE so far seen,
3346 or 0 if none has been seen so far.
3347 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3350 if (best_index
>= 0)
3351 best
= best_linetable
->item
[best_index
].line
;
3355 for (objfile
*objfile
: all_objfiles (current_program_space
))
3358 objfile
->sf
->qf
->expand_symtabs_with_fullname
3359 (objfile
, symtab_to_fullname (sym_tab
));
3362 struct objfile
*objfile
;
3363 ALL_FILETABS (objfile
, cu
, s
)
3365 struct linetable
*l
;
3368 if (FILENAME_CMP (sym_tab
->filename
, s
->filename
) != 0)
3370 if (FILENAME_CMP (symtab_to_fullname (sym_tab
),
3371 symtab_to_fullname (s
)) != 0)
3373 l
= SYMTAB_LINETABLE (s
);
3374 ind
= find_line_common (l
, line
, &exact
, 0);
3384 if (best
== 0 || l
->item
[ind
].line
< best
)
3386 best
= l
->item
[ind
].line
;
3399 *index
= best_index
;
3401 *exact_match
= exact
;
3406 /* Given SYMTAB, returns all the PCs function in the symtab that
3407 exactly match LINE. Returns an empty vector if there are no exact
3408 matches, but updates BEST_ITEM in this case. */
3410 std::vector
<CORE_ADDR
>
3411 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3412 struct linetable_entry
**best_item
)
3415 std::vector
<CORE_ADDR
> result
;
3417 /* First, collect all the PCs that are at this line. */
3423 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3430 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3432 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3438 result
.push_back (SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3446 /* Set the PC value for a given source file and line number and return true.
3447 Returns zero for invalid line number (and sets the PC to 0).
3448 The source file is specified with a struct symtab. */
3451 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3453 struct linetable
*l
;
3460 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3463 l
= SYMTAB_LINETABLE (symtab
);
3464 *pc
= l
->item
[ind
].pc
;
3471 /* Find the range of pc values in a line.
3472 Store the starting pc of the line into *STARTPTR
3473 and the ending pc (start of next line) into *ENDPTR.
3474 Returns 1 to indicate success.
3475 Returns 0 if could not find the specified line. */
3478 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3481 CORE_ADDR startaddr
;
3482 struct symtab_and_line found_sal
;
3485 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3488 /* This whole function is based on address. For example, if line 10 has
3489 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3490 "info line *0x123" should say the line goes from 0x100 to 0x200
3491 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3492 This also insures that we never give a range like "starts at 0x134
3493 and ends at 0x12c". */
3495 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3496 if (found_sal
.line
!= sal
.line
)
3498 /* The specified line (sal) has zero bytes. */
3499 *startptr
= found_sal
.pc
;
3500 *endptr
= found_sal
.pc
;
3504 *startptr
= found_sal
.pc
;
3505 *endptr
= found_sal
.end
;
3510 /* Given a line table and a line number, return the index into the line
3511 table for the pc of the nearest line whose number is >= the specified one.
3512 Return -1 if none is found. The value is >= 0 if it is an index.
3513 START is the index at which to start searching the line table.
3515 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3518 find_line_common (struct linetable
*l
, int lineno
,
3519 int *exact_match
, int start
)
3524 /* BEST is the smallest linenumber > LINENO so far seen,
3525 or 0 if none has been seen so far.
3526 BEST_INDEX identifies the item for it. */
3528 int best_index
= -1;
3539 for (i
= start
; i
< len
; i
++)
3541 struct linetable_entry
*item
= &(l
->item
[i
]);
3543 if (item
->line
== lineno
)
3545 /* Return the first (lowest address) entry which matches. */
3550 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3557 /* If we got here, we didn't get an exact match. */
3562 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3564 struct symtab_and_line sal
;
3566 sal
= find_pc_line (pc
, 0);
3569 return sal
.symtab
!= 0;
3572 /* Helper for find_function_start_sal. Does most of the work, except
3573 setting the sal's symbol. */
3575 static symtab_and_line
3576 find_function_start_sal_1 (CORE_ADDR func_addr
, obj_section
*section
,
3579 symtab_and_line sal
= find_pc_sect_line (func_addr
, section
, 0);
3581 if (funfirstline
&& sal
.symtab
!= NULL
3582 && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal
.symtab
))
3583 || SYMTAB_LANGUAGE (sal
.symtab
) == language_asm
))
3585 struct gdbarch
*gdbarch
= get_objfile_arch (SYMTAB_OBJFILE (sal
.symtab
));
3588 if (gdbarch_skip_entrypoint_p (gdbarch
))
3589 sal
.pc
= gdbarch_skip_entrypoint (gdbarch
, sal
.pc
);
3593 /* We always should have a line for the function start address.
3594 If we don't, something is odd. Create a plain SAL referring
3595 just the PC and hope that skip_prologue_sal (if requested)
3596 can find a line number for after the prologue. */
3597 if (sal
.pc
< func_addr
)
3600 sal
.pspace
= current_program_space
;
3602 sal
.section
= section
;
3606 skip_prologue_sal (&sal
);
3614 find_function_start_sal (CORE_ADDR func_addr
, obj_section
*section
,
3618 = find_function_start_sal_1 (func_addr
, section
, funfirstline
);
3620 /* find_function_start_sal_1 does a linetable search, so it finds
3621 the symtab and linenumber, but not a symbol. Fill in the
3622 function symbol too. */
3623 sal
.symbol
= find_pc_sect_containing_function (sal
.pc
, sal
.section
);
3631 find_function_start_sal (symbol
*sym
, bool funfirstline
)
3633 fixup_symbol_section (sym
, NULL
);
3635 = find_function_start_sal_1 (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
)),
3636 SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
),
3643 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3644 address for that function that has an entry in SYMTAB's line info
3645 table. If such an entry cannot be found, return FUNC_ADDR
3649 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3651 CORE_ADDR func_start
, func_end
;
3652 struct linetable
*l
;
3655 /* Give up if this symbol has no lineinfo table. */
3656 l
= SYMTAB_LINETABLE (symtab
);
3660 /* Get the range for the function's PC values, or give up if we
3661 cannot, for some reason. */
3662 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3665 /* Linetable entries are ordered by PC values, see the commentary in
3666 symtab.h where `struct linetable' is defined. Thus, the first
3667 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3668 address we are looking for. */
3669 for (i
= 0; i
< l
->nitems
; i
++)
3671 struct linetable_entry
*item
= &(l
->item
[i
]);
3673 /* Don't use line numbers of zero, they mark special entries in
3674 the table. See the commentary on symtab.h before the
3675 definition of struct linetable. */
3676 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3683 /* Adjust SAL to the first instruction past the function prologue.
3684 If the PC was explicitly specified, the SAL is not changed.
3685 If the line number was explicitly specified, at most the SAL's PC
3686 is updated. If SAL is already past the prologue, then do nothing. */
3689 skip_prologue_sal (struct symtab_and_line
*sal
)
3692 struct symtab_and_line start_sal
;
3693 CORE_ADDR pc
, saved_pc
;
3694 struct obj_section
*section
;
3696 struct objfile
*objfile
;
3697 struct gdbarch
*gdbarch
;
3698 const struct block
*b
, *function_block
;
3699 int force_skip
, skip
;
3701 /* Do not change the SAL if PC was specified explicitly. */
3702 if (sal
->explicit_pc
)
3705 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
3707 switch_to_program_space_and_thread (sal
->pspace
);
3709 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3712 fixup_symbol_section (sym
, NULL
);
3714 objfile
= symbol_objfile (sym
);
3715 pc
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
));
3716 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3717 name
= SYMBOL_LINKAGE_NAME (sym
);
3721 struct bound_minimal_symbol msymbol
3722 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3724 if (msymbol
.minsym
== NULL
)
3727 objfile
= msymbol
.objfile
;
3728 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3729 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3730 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3733 gdbarch
= get_objfile_arch (objfile
);
3735 /* Process the prologue in two passes. In the first pass try to skip the
3736 prologue (SKIP is true) and verify there is a real need for it (indicated
3737 by FORCE_SKIP). If no such reason was found run a second pass where the
3738 prologue is not skipped (SKIP is false). */
3743 /* Be conservative - allow direct PC (without skipping prologue) only if we
3744 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3745 have to be set by the caller so we use SYM instead. */
3747 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3755 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3756 so that gdbarch_skip_prologue has something unique to work on. */
3757 if (section_is_overlay (section
) && !section_is_mapped (section
))
3758 pc
= overlay_unmapped_address (pc
, section
);
3760 /* Skip "first line" of function (which is actually its prologue). */
3761 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3762 if (gdbarch_skip_entrypoint_p (gdbarch
))
3763 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3765 pc
= gdbarch_skip_prologue_noexcept (gdbarch
, pc
);
3767 /* For overlays, map pc back into its mapped VMA range. */
3768 pc
= overlay_mapped_address (pc
, section
);
3770 /* Calculate line number. */
3771 start_sal
= find_pc_sect_line (pc
, section
, 0);
3773 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3774 line is still part of the same function. */
3775 if (skip
&& start_sal
.pc
!= pc
3776 && (sym
? (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3777 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3778 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3779 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3781 /* First pc of next line */
3783 /* Recalculate the line number (might not be N+1). */
3784 start_sal
= find_pc_sect_line (pc
, section
, 0);
3787 /* On targets with executable formats that don't have a concept of
3788 constructors (ELF with .init has, PE doesn't), gcc emits a call
3789 to `__main' in `main' between the prologue and before user
3791 if (gdbarch_skip_main_prologue_p (gdbarch
)
3792 && name
&& strcmp_iw (name
, "main") == 0)
3794 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3795 /* Recalculate the line number (might not be N+1). */
3796 start_sal
= find_pc_sect_line (pc
, section
, 0);
3800 while (!force_skip
&& skip
--);
3802 /* If we still don't have a valid source line, try to find the first
3803 PC in the lineinfo table that belongs to the same function. This
3804 happens with COFF debug info, which does not seem to have an
3805 entry in lineinfo table for the code after the prologue which has
3806 no direct relation to source. For example, this was found to be
3807 the case with the DJGPP target using "gcc -gcoff" when the
3808 compiler inserted code after the prologue to make sure the stack
3810 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3812 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3813 /* Recalculate the line number. */
3814 start_sal
= find_pc_sect_line (pc
, section
, 0);
3817 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3818 forward SAL to the end of the prologue. */
3823 sal
->section
= section
;
3825 /* Unless the explicit_line flag was set, update the SAL line
3826 and symtab to correspond to the modified PC location. */
3827 if (sal
->explicit_line
)
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_filtered (name
, 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 objfile
*objfile
;
4184 struct output_source_filename_data data
;
4186 if (!have_full_symbols () && !have_partial_symbols ())
4188 error (_("No symbol table is loaded. Use the \"file\" command."));
4191 filename_seen_cache filenames_seen
;
4193 data
.filename_seen_cache
= &filenames_seen
;
4195 printf_filtered ("Source files for which symbols have been read in:\n\n");
4198 ALL_FILETABS (objfile
, cu
, s
)
4200 const char *fullname
= symtab_to_fullname (s
);
4202 output_source_filename (fullname
, &data
);
4204 printf_filtered ("\n\n");
4206 printf_filtered ("Source files for which symbols "
4207 "will be read in on demand:\n\n");
4209 filenames_seen
.clear ();
4211 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4212 1 /*need_fullname*/);
4213 printf_filtered ("\n");
4216 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4217 non-zero compare only lbasename of FILES. */
4220 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4224 if (file
!= NULL
&& nfiles
!= 0)
4226 for (i
= 0; i
< nfiles
; i
++)
4228 if (compare_filenames_for_search (file
, (basenames
4229 ? lbasename (files
[i
])
4234 else if (nfiles
== 0)
4239 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4240 sort symbols, not minimal symbols. */
4243 symbol_search::compare_search_syms (const symbol_search
&sym_a
,
4244 const symbol_search
&sym_b
)
4248 c
= FILENAME_CMP (symbol_symtab (sym_a
.symbol
)->filename
,
4249 symbol_symtab (sym_b
.symbol
)->filename
);
4253 if (sym_a
.block
!= sym_b
.block
)
4254 return sym_a
.block
- sym_b
.block
;
4256 return strcmp (SYMBOL_PRINT_NAME (sym_a
.symbol
),
4257 SYMBOL_PRINT_NAME (sym_b
.symbol
));
4260 /* Returns true if the type_name of symbol_type of SYM matches TREG.
4261 If SYM has no symbol_type or symbol_name, returns false. */
4264 treg_matches_sym_type_name (const compiled_regex
&treg
,
4265 const struct symbol
*sym
)
4267 struct type
*sym_type
;
4268 std::string printed_sym_type_name
;
4270 if (symbol_lookup_debug
> 1)
4272 fprintf_unfiltered (gdb_stdlog
,
4273 "treg_matches_sym_type_name\n sym %s\n",
4274 SYMBOL_NATURAL_NAME (sym
));
4277 sym_type
= SYMBOL_TYPE (sym
);
4278 if (sym_type
== NULL
)
4282 scoped_switch_to_sym_language_if_auto
l (sym
);
4284 printed_sym_type_name
= type_to_string (sym_type
);
4288 if (symbol_lookup_debug
> 1)
4290 fprintf_unfiltered (gdb_stdlog
,
4291 " sym_type_name %s\n",
4292 printed_sym_type_name
.c_str ());
4296 if (printed_sym_type_name
.empty ())
4299 return treg
.exec (printed_sym_type_name
.c_str (), 0, NULL
, 0) == 0;
4303 /* Sort the symbols in RESULT and remove duplicates. */
4306 sort_search_symbols_remove_dups (std::vector
<symbol_search
> *result
)
4308 std::sort (result
->begin (), result
->end ());
4309 result
->erase (std::unique (result
->begin (), result
->end ()),
4313 /* Search the symbol table for matches to the regular expression REGEXP,
4314 returning the results.
4316 Only symbols of KIND are searched:
4317 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4318 and constants (enums).
4319 if T_REGEXP is not NULL, only returns var that have
4320 a type matching regular expression T_REGEXP.
4321 FUNCTIONS_DOMAIN - search all functions
4322 TYPES_DOMAIN - search all type names
4323 ALL_DOMAIN - an internal error for this function
4325 Within each file the results are sorted locally; each symtab's global and
4326 static blocks are separately alphabetized.
4327 Duplicate entries are removed. */
4329 std::vector
<symbol_search
>
4330 search_symbols (const char *regexp
, enum search_domain kind
,
4331 const char *t_regexp
,
4332 int nfiles
, const char *files
[])
4334 const struct blockvector
*bv
;
4337 struct block_iterator iter
;
4340 static const enum minimal_symbol_type types
[]
4341 = {mst_data
, mst_text
, mst_abs
};
4342 static const enum minimal_symbol_type types2
[]
4343 = {mst_bss
, mst_file_text
, mst_abs
};
4344 static const enum minimal_symbol_type types3
[]
4345 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4346 static const enum minimal_symbol_type types4
[]
4347 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4348 enum minimal_symbol_type ourtype
;
4349 enum minimal_symbol_type ourtype2
;
4350 enum minimal_symbol_type ourtype3
;
4351 enum minimal_symbol_type ourtype4
;
4352 std::vector
<symbol_search
> result
;
4353 gdb::optional
<compiled_regex
> preg
;
4354 gdb::optional
<compiled_regex
> treg
;
4356 gdb_assert (kind
<= TYPES_DOMAIN
);
4358 ourtype
= types
[kind
];
4359 ourtype2
= types2
[kind
];
4360 ourtype3
= types3
[kind
];
4361 ourtype4
= types4
[kind
];
4365 /* Make sure spacing is right for C++ operators.
4366 This is just a courtesy to make the matching less sensitive
4367 to how many spaces the user leaves between 'operator'
4368 and <TYPENAME> or <OPERATOR>. */
4370 const char *opname
= operator_chars (regexp
, &opend
);
4374 int fix
= -1; /* -1 means ok; otherwise number of
4377 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4379 /* There should 1 space between 'operator' and 'TYPENAME'. */
4380 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4385 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4386 if (opname
[-1] == ' ')
4389 /* If wrong number of spaces, fix it. */
4392 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4394 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4399 int cflags
= REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4401 preg
.emplace (regexp
, cflags
, _("Invalid regexp"));
4404 if (t_regexp
!= NULL
)
4406 int cflags
= REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4408 treg
.emplace (t_regexp
, cflags
, _("Invalid regexp"));
4411 /* Search through the partial symtabs *first* for all symbols
4412 matching the regexp. That way we don't have to reproduce all of
4413 the machinery below. */
4414 expand_symtabs_matching ([&] (const char *filename
, bool basenames
)
4416 return file_matches (filename
, files
, nfiles
,
4419 lookup_name_info::match_any (),
4420 [&] (const char *symname
)
4422 return (!preg
.has_value ()
4423 || preg
->exec (symname
,
4429 /* Here, we search through the minimal symbol tables for functions
4430 and variables that match, and force their symbols to be read.
4431 This is in particular necessary for demangled variable names,
4432 which are no longer put into the partial symbol tables.
4433 The symbol will then be found during the scan of symtabs below.
4435 For functions, find_pc_symtab should succeed if we have debug info
4436 for the function, for variables we have to call
4437 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4439 If the lookup fails, set found_misc so that we will rescan to print
4440 any matching symbols without debug info.
4441 We only search the objfile the msymbol came from, we no longer search
4442 all objfiles. In large programs (1000s of shared libs) searching all
4443 objfiles is not worth the pain. */
4445 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4447 for (objfile
*objfile
: all_objfiles (current_program_space
))
4449 for (minimal_symbol
*msymbol
: objfile_msymbols (objfile
))
4453 if (msymbol
->created_by_gdb
)
4456 if (MSYMBOL_TYPE (msymbol
) == ourtype
4457 || MSYMBOL_TYPE (msymbol
) == ourtype2
4458 || MSYMBOL_TYPE (msymbol
) == ourtype3
4459 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4461 if (!preg
.has_value ()
4462 || preg
->exec (MSYMBOL_NATURAL_NAME (msymbol
), 0,
4465 /* Note: An important side-effect of these
4466 lookup functions is to expand the symbol
4467 table if msymbol is found, for the benefit of
4468 the next loop on compunits. */
4469 if (kind
== FUNCTIONS_DOMAIN
4470 ? (find_pc_compunit_symtab
4471 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
))
4473 : (lookup_symbol_in_objfile_from_linkage_name
4474 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
),
4484 for (objfile
*objfile
: all_objfiles (current_program_space
))
4486 for (compunit_symtab
*cust
: objfile_compunits (objfile
))
4488 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4489 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4491 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4492 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4494 struct symtab
*real_symtab
= symbol_symtab (sym
);
4498 /* Check first sole REAL_SYMTAB->FILENAME. It does
4499 not need to be a substring of symtab_to_fullname as
4500 it may contain "./" etc. */
4501 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4502 || ((basenames_may_differ
4503 || file_matches (lbasename (real_symtab
->filename
),
4505 && file_matches (symtab_to_fullname (real_symtab
),
4507 && ((!preg
.has_value ()
4508 || preg
->exec (SYMBOL_NATURAL_NAME (sym
), 0,
4510 && ((kind
== VARIABLES_DOMAIN
4511 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4512 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4513 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4514 /* LOC_CONST can be used for more than
4515 just enums, e.g., c++ static const
4516 members. We only want to skip enums
4518 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4519 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4521 && (!treg
.has_value ()
4522 || treg_matches_sym_type_name (*treg
, sym
)))
4523 || (kind
== FUNCTIONS_DOMAIN
4524 && SYMBOL_CLASS (sym
) == LOC_BLOCK
4525 && (!treg
.has_value ()
4526 || treg_matches_sym_type_name (*treg
,
4528 || (kind
== TYPES_DOMAIN
4529 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4532 result
.emplace_back (i
, sym
);
4539 if (!result
.empty ())
4540 sort_search_symbols_remove_dups (&result
);
4542 /* If there are no eyes, avoid all contact. I mean, if there are
4543 no debug symbols, then add matching minsyms. But if the user wants
4544 to see symbols matching a type regexp, then never give a minimal symbol,
4545 as we assume that a minimal symbol does not have a type. */
4547 if ((found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4548 && !treg
.has_value ())
4550 for (objfile
*objfile
: all_objfiles (current_program_space
))
4552 for (minimal_symbol
*msymbol
: objfile_msymbols (objfile
))
4556 if (msymbol
->created_by_gdb
)
4559 if (MSYMBOL_TYPE (msymbol
) == ourtype
4560 || MSYMBOL_TYPE (msymbol
) == ourtype2
4561 || MSYMBOL_TYPE (msymbol
) == ourtype3
4562 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4564 if (!preg
.has_value ()
4565 || preg
->exec (MSYMBOL_NATURAL_NAME (msymbol
), 0,
4568 /* For functions we can do a quick check of whether the
4569 symbol might be found via find_pc_symtab. */
4570 if (kind
!= FUNCTIONS_DOMAIN
4571 || (find_pc_compunit_symtab
4572 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
))
4575 if (lookup_symbol_in_objfile_from_linkage_name
4576 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
),
4581 result
.emplace_back (i
, msymbol
, objfile
);
4593 /* Helper function for symtab_symbol_info, this function uses
4594 the data returned from search_symbols() to print information
4595 regarding the match to gdb_stdout. If LAST is not NULL,
4596 print file and line number information for the symbol as
4597 well. Skip printing the filename if it matches LAST. */
4600 print_symbol_info (enum search_domain kind
,
4602 int block
, const char *last
)
4604 scoped_switch_to_sym_language_if_auto
l (sym
);
4605 struct symtab
*s
= symbol_symtab (sym
);
4609 const char *s_filename
= symtab_to_filename_for_display (s
);
4611 if (filename_cmp (last
, s_filename
) != 0)
4613 fputs_filtered ("\nFile ", gdb_stdout
);
4614 fputs_filtered (s_filename
, gdb_stdout
);
4615 fputs_filtered (":\n", gdb_stdout
);
4618 if (SYMBOL_LINE (sym
) != 0)
4619 printf_filtered ("%d:\t", SYMBOL_LINE (sym
));
4621 puts_filtered ("\t");
4624 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4625 printf_filtered ("static ");
4627 /* Typedef that is not a C++ class. */
4628 if (kind
== TYPES_DOMAIN
4629 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4630 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4631 /* variable, func, or typedef-that-is-c++-class. */
4632 else if (kind
< TYPES_DOMAIN
4633 || (kind
== TYPES_DOMAIN
4634 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4636 type_print (SYMBOL_TYPE (sym
),
4637 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4638 ? "" : SYMBOL_PRINT_NAME (sym
)),
4641 printf_filtered (";\n");
4645 /* This help function for symtab_symbol_info() prints information
4646 for non-debugging symbols to gdb_stdout. */
4649 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4651 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4654 if (gdbarch_addr_bit (gdbarch
) <= 32)
4655 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4656 & (CORE_ADDR
) 0xffffffff,
4659 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4661 printf_filtered ("%s %s\n",
4662 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4665 /* This is the guts of the commands "info functions", "info types", and
4666 "info variables". It calls search_symbols to find all matches and then
4667 print_[m]symbol_info to print out some useful information about the
4671 symtab_symbol_info (bool quiet
,
4672 const char *regexp
, enum search_domain kind
,
4673 const char *t_regexp
, int from_tty
)
4675 static const char * const classnames
[] =
4676 {"variable", "function", "type"};
4677 const char *last_filename
= "";
4680 gdb_assert (kind
<= TYPES_DOMAIN
);
4682 /* Must make sure that if we're interrupted, symbols gets freed. */
4683 std::vector
<symbol_search
> symbols
= search_symbols (regexp
, kind
,
4690 if (t_regexp
!= NULL
)
4692 (_("All %ss matching regular expression \"%s\""
4693 " with type matching regulation expression \"%s\":\n"),
4694 classnames
[kind
], regexp
, t_regexp
);
4696 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4697 classnames
[kind
], regexp
);
4701 if (t_regexp
!= NULL
)
4703 (_("All defined %ss"
4704 " with type matching regulation expression \"%s\" :\n"),
4705 classnames
[kind
], t_regexp
);
4707 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4711 for (const symbol_search
&p
: symbols
)
4715 if (p
.msymbol
.minsym
!= NULL
)
4720 printf_filtered (_("\nNon-debugging symbols:\n"));
4723 print_msymbol_info (p
.msymbol
);
4727 print_symbol_info (kind
,
4732 = symtab_to_filename_for_display (symbol_symtab (p
.symbol
));
4738 info_variables_command (const char *args
, int from_tty
)
4741 std::string t_regexp
;
4745 && extract_info_print_args (&args
, &quiet
, ®exp
, &t_regexp
))
4749 report_unrecognized_option_error ("info variables", args
);
4751 symtab_symbol_info (quiet
,
4752 regexp
.empty () ? NULL
: regexp
.c_str (),
4754 t_regexp
.empty () ? NULL
: t_regexp
.c_str (),
4760 info_functions_command (const char *args
, int from_tty
)
4763 std::string t_regexp
;
4767 && extract_info_print_args (&args
, &quiet
, ®exp
, &t_regexp
))
4771 report_unrecognized_option_error ("info functions", args
);
4773 symtab_symbol_info (quiet
,
4774 regexp
.empty () ? NULL
: regexp
.c_str (),
4776 t_regexp
.empty () ? NULL
: t_regexp
.c_str (),
4782 info_types_command (const char *regexp
, int from_tty
)
4784 symtab_symbol_info (false, regexp
, TYPES_DOMAIN
, NULL
, from_tty
);
4787 /* Breakpoint all functions matching regular expression. */
4790 rbreak_command_wrapper (char *regexp
, int from_tty
)
4792 rbreak_command (regexp
, from_tty
);
4796 rbreak_command (const char *regexp
, int from_tty
)
4799 const char **files
= NULL
;
4800 const char *file_name
;
4805 const char *colon
= strchr (regexp
, ':');
4807 if (colon
&& *(colon
+ 1) != ':')
4812 colon_index
= colon
- regexp
;
4813 local_name
= (char *) alloca (colon_index
+ 1);
4814 memcpy (local_name
, regexp
, colon_index
);
4815 local_name
[colon_index
--] = 0;
4816 while (isspace (local_name
[colon_index
]))
4817 local_name
[colon_index
--] = 0;
4818 file_name
= local_name
;
4821 regexp
= skip_spaces (colon
+ 1);
4825 std::vector
<symbol_search
> symbols
= search_symbols (regexp
,
4830 scoped_rbreak_breakpoints finalize
;
4831 for (const symbol_search
&p
: symbols
)
4833 if (p
.msymbol
.minsym
== NULL
)
4835 struct symtab
*symtab
= symbol_symtab (p
.symbol
);
4836 const char *fullname
= symtab_to_fullname (symtab
);
4838 string
= string_printf ("%s:'%s'", fullname
,
4839 SYMBOL_LINKAGE_NAME (p
.symbol
));
4840 break_command (&string
[0], from_tty
);
4841 print_symbol_info (FUNCTIONS_DOMAIN
, p
.symbol
, p
.block
, NULL
);
4845 string
= string_printf ("'%s'",
4846 MSYMBOL_LINKAGE_NAME (p
.msymbol
.minsym
));
4848 break_command (&string
[0], from_tty
);
4849 printf_filtered ("<function, no debug info> %s;\n",
4850 MSYMBOL_PRINT_NAME (p
.msymbol
.minsym
));
4856 /* Evaluate if SYMNAME matches LOOKUP_NAME. */
4859 compare_symbol_name (const char *symbol_name
, language symbol_language
,
4860 const lookup_name_info
&lookup_name
,
4861 completion_match_result
&match_res
)
4863 const language_defn
*lang
= language_def (symbol_language
);
4865 symbol_name_matcher_ftype
*name_match
4866 = get_symbol_name_matcher (lang
, lookup_name
);
4868 return name_match (symbol_name
, lookup_name
, &match_res
);
4874 completion_list_add_name (completion_tracker
&tracker
,
4875 language symbol_language
,
4876 const char *symname
,
4877 const lookup_name_info
&lookup_name
,
4878 const char *text
, const char *word
)
4880 completion_match_result
&match_res
4881 = tracker
.reset_completion_match_result ();
4883 /* Clip symbols that cannot match. */
4884 if (!compare_symbol_name (symname
, symbol_language
, lookup_name
, match_res
))
4887 /* Refresh SYMNAME from the match string. It's potentially
4888 different depending on language. (E.g., on Ada, the match may be
4889 the encoded symbol name wrapped in "<>"). */
4890 symname
= match_res
.match
.match ();
4891 gdb_assert (symname
!= NULL
);
4893 /* We have a match for a completion, so add SYMNAME to the current list
4894 of matches. Note that the name is moved to freshly malloc'd space. */
4897 gdb::unique_xmalloc_ptr
<char> completion
4898 = make_completion_match_str (symname
, text
, word
);
4900 /* Here we pass the match-for-lcd object to add_completion. Some
4901 languages match the user text against substrings of symbol
4902 names in some cases. E.g., in C++, "b push_ba" completes to
4903 "std::vector::push_back", "std::string::push_back", etc., and
4904 in this case we want the completion lowest common denominator
4905 to be "push_back" instead of "std::". */
4906 tracker
.add_completion (std::move (completion
),
4907 &match_res
.match_for_lcd
, text
, word
);
4911 /* completion_list_add_name wrapper for struct symbol. */
4914 completion_list_add_symbol (completion_tracker
&tracker
,
4916 const lookup_name_info
&lookup_name
,
4917 const char *text
, const char *word
)
4919 completion_list_add_name (tracker
, SYMBOL_LANGUAGE (sym
),
4920 SYMBOL_NATURAL_NAME (sym
),
4921 lookup_name
, text
, word
);
4924 /* completion_list_add_name wrapper for struct minimal_symbol. */
4927 completion_list_add_msymbol (completion_tracker
&tracker
,
4928 minimal_symbol
*sym
,
4929 const lookup_name_info
&lookup_name
,
4930 const char *text
, const char *word
)
4932 completion_list_add_name (tracker
, MSYMBOL_LANGUAGE (sym
),
4933 MSYMBOL_NATURAL_NAME (sym
),
4934 lookup_name
, text
, word
);
4938 /* ObjC: In case we are completing on a selector, look as the msymbol
4939 again and feed all the selectors into the mill. */
4942 completion_list_objc_symbol (completion_tracker
&tracker
,
4943 struct minimal_symbol
*msymbol
,
4944 const lookup_name_info
&lookup_name
,
4945 const char *text
, const char *word
)
4947 static char *tmp
= NULL
;
4948 static unsigned int tmplen
= 0;
4950 const char *method
, *category
, *selector
;
4953 method
= MSYMBOL_NATURAL_NAME (msymbol
);
4955 /* Is it a method? */
4956 if ((method
[0] != '-') && (method
[0] != '+'))
4960 /* Complete on shortened method method. */
4961 completion_list_add_name (tracker
, language_objc
,
4966 while ((strlen (method
) + 1) >= tmplen
)
4972 tmp
= (char *) xrealloc (tmp
, tmplen
);
4974 selector
= strchr (method
, ' ');
4975 if (selector
!= NULL
)
4978 category
= strchr (method
, '(');
4980 if ((category
!= NULL
) && (selector
!= NULL
))
4982 memcpy (tmp
, method
, (category
- method
));
4983 tmp
[category
- method
] = ' ';
4984 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4985 completion_list_add_name (tracker
, language_objc
, tmp
,
4986 lookup_name
, text
, word
);
4988 completion_list_add_name (tracker
, language_objc
, tmp
+ 1,
4989 lookup_name
, text
, word
);
4992 if (selector
!= NULL
)
4994 /* Complete on selector only. */
4995 strcpy (tmp
, selector
);
4996 tmp2
= strchr (tmp
, ']');
5000 completion_list_add_name (tracker
, language_objc
, tmp
,
5001 lookup_name
, text
, word
);
5005 /* Break the non-quoted text based on the characters which are in
5006 symbols. FIXME: This should probably be language-specific. */
5009 language_search_unquoted_string (const char *text
, const char *p
)
5011 for (; p
> text
; --p
)
5013 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5017 if ((current_language
->la_language
== language_objc
))
5019 if (p
[-1] == ':') /* Might be part of a method name. */
5021 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5022 p
-= 2; /* Beginning of a method name. */
5023 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5024 { /* Might be part of a method name. */
5027 /* Seeing a ' ' or a '(' is not conclusive evidence
5028 that we are in the middle of a method name. However,
5029 finding "-[" or "+[" should be pretty un-ambiguous.
5030 Unfortunately we have to find it now to decide. */
5033 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5034 t
[-1] == ' ' || t
[-1] == ':' ||
5035 t
[-1] == '(' || t
[-1] == ')')
5040 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5041 p
= t
- 2; /* Method name detected. */
5042 /* Else we leave with p unchanged. */
5052 completion_list_add_fields (completion_tracker
&tracker
,
5054 const lookup_name_info
&lookup_name
,
5055 const char *text
, const char *word
)
5057 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5059 struct type
*t
= SYMBOL_TYPE (sym
);
5060 enum type_code c
= TYPE_CODE (t
);
5063 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5064 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5065 if (TYPE_FIELD_NAME (t
, j
))
5066 completion_list_add_name (tracker
, SYMBOL_LANGUAGE (sym
),
5067 TYPE_FIELD_NAME (t
, j
),
5068 lookup_name
, text
, word
);
5075 symbol_is_function_or_method (symbol
*sym
)
5077 switch (TYPE_CODE (SYMBOL_TYPE (sym
)))
5079 case TYPE_CODE_FUNC
:
5080 case TYPE_CODE_METHOD
:
5090 symbol_is_function_or_method (minimal_symbol
*msymbol
)
5092 switch (MSYMBOL_TYPE (msymbol
))
5095 case mst_text_gnu_ifunc
:
5096 case mst_solib_trampoline
:
5106 bound_minimal_symbol
5107 find_gnu_ifunc (const symbol
*sym
)
5109 if (SYMBOL_CLASS (sym
) != LOC_BLOCK
)
5112 lookup_name_info
lookup_name (SYMBOL_SEARCH_NAME (sym
),
5113 symbol_name_match_type::SEARCH_NAME
);
5114 struct objfile
*objfile
= symbol_objfile (sym
);
5116 CORE_ADDR address
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (sym
));
5117 minimal_symbol
*ifunc
= NULL
;
5119 iterate_over_minimal_symbols (objfile
, lookup_name
,
5120 [&] (minimal_symbol
*minsym
)
5122 if (MSYMBOL_TYPE (minsym
) == mst_text_gnu_ifunc
5123 || MSYMBOL_TYPE (minsym
) == mst_data_gnu_ifunc
)
5125 CORE_ADDR msym_addr
= MSYMBOL_VALUE_ADDRESS (objfile
, minsym
);
5126 if (MSYMBOL_TYPE (minsym
) == mst_data_gnu_ifunc
)
5128 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
5130 = gdbarch_convert_from_func_ptr_addr (gdbarch
,
5132 current_top_target ());
5134 if (msym_addr
== address
)
5144 return {ifunc
, objfile
};
5148 /* Add matching symbols from SYMTAB to the current completion list. */
5151 add_symtab_completions (struct compunit_symtab
*cust
,
5152 completion_tracker
&tracker
,
5153 complete_symbol_mode mode
,
5154 const lookup_name_info
&lookup_name
,
5155 const char *text
, const char *word
,
5156 enum type_code code
)
5159 const struct block
*b
;
5160 struct block_iterator iter
;
5166 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5169 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5170 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5172 if (completion_skip_symbol (mode
, sym
))
5175 if (code
== TYPE_CODE_UNDEF
5176 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5177 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5178 completion_list_add_symbol (tracker
, sym
,
5186 default_collect_symbol_completion_matches_break_on
5187 (completion_tracker
&tracker
, complete_symbol_mode mode
,
5188 symbol_name_match_type name_match_type
,
5189 const char *text
, const char *word
,
5190 const char *break_on
, enum type_code code
)
5192 /* Problem: All of the symbols have to be copied because readline
5193 frees them. I'm not going to worry about this; hopefully there
5194 won't be that many. */
5197 const struct block
*b
;
5198 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5199 struct block_iterator iter
;
5200 /* The symbol we are completing on. Points in same buffer as text. */
5201 const char *sym_text
;
5203 /* Now look for the symbol we are supposed to complete on. */
5204 if (mode
== complete_symbol_mode::LINESPEC
)
5210 const char *quote_pos
= NULL
;
5212 /* First see if this is a quoted string. */
5214 for (p
= text
; *p
!= '\0'; ++p
)
5216 if (quote_found
!= '\0')
5218 if (*p
== quote_found
)
5219 /* Found close quote. */
5221 else if (*p
== '\\' && p
[1] == quote_found
)
5222 /* A backslash followed by the quote character
5223 doesn't end the string. */
5226 else if (*p
== '\'' || *p
== '"')
5232 if (quote_found
== '\'')
5233 /* A string within single quotes can be a symbol, so complete on it. */
5234 sym_text
= quote_pos
+ 1;
5235 else if (quote_found
== '"')
5236 /* A double-quoted string is never a symbol, nor does it make sense
5237 to complete it any other way. */
5243 /* It is not a quoted string. Break it based on the characters
5244 which are in symbols. */
5247 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5248 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5257 lookup_name_info
lookup_name (sym_text
, name_match_type
, true);
5259 /* At this point scan through the misc symbol vectors and add each
5260 symbol you find to the list. Eventually we want to ignore
5261 anything that isn't a text symbol (everything else will be
5262 handled by the psymtab code below). */
5264 if (code
== TYPE_CODE_UNDEF
)
5266 for (objfile
*objfile
: all_objfiles (current_program_space
))
5268 for (minimal_symbol
*msymbol
: objfile_msymbols (objfile
))
5272 if (completion_skip_symbol (mode
, msymbol
))
5275 completion_list_add_msymbol (tracker
, msymbol
, lookup_name
,
5278 completion_list_objc_symbol (tracker
, msymbol
, lookup_name
,
5284 /* Add completions for all currently loaded symbol tables. */
5285 for (objfile
*objfile
: all_objfiles (current_program_space
))
5287 for (compunit_symtab
*cust
: objfile_compunits (objfile
))
5288 add_symtab_completions (cust
, tracker
, mode
, lookup_name
,
5289 sym_text
, word
, code
);
5292 /* Look through the partial symtabs for all symbols which begin by
5293 matching SYM_TEXT. Expand all CUs that you find to the list. */
5294 expand_symtabs_matching (NULL
,
5297 [&] (compunit_symtab
*symtab
) /* expansion notify */
5299 add_symtab_completions (symtab
,
5300 tracker
, mode
, lookup_name
,
5301 sym_text
, word
, code
);
5305 /* Search upwards from currently selected frame (so that we can
5306 complete on local vars). Also catch fields of types defined in
5307 this places which match our text string. Only complete on types
5308 visible from current context. */
5310 b
= get_selected_block (0);
5311 surrounding_static_block
= block_static_block (b
);
5312 surrounding_global_block
= block_global_block (b
);
5313 if (surrounding_static_block
!= NULL
)
5314 while (b
!= surrounding_static_block
)
5318 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5320 if (code
== TYPE_CODE_UNDEF
)
5322 completion_list_add_symbol (tracker
, sym
, lookup_name
,
5324 completion_list_add_fields (tracker
, sym
, lookup_name
,
5327 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5328 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5329 completion_list_add_symbol (tracker
, sym
, lookup_name
,
5333 /* Stop when we encounter an enclosing function. Do not stop for
5334 non-inlined functions - the locals of the enclosing function
5335 are in scope for a nested function. */
5336 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5338 b
= BLOCK_SUPERBLOCK (b
);
5341 /* Add fields from the file's types; symbols will be added below. */
5343 if (code
== TYPE_CODE_UNDEF
)
5345 if (surrounding_static_block
!= NULL
)
5346 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5347 completion_list_add_fields (tracker
, sym
, lookup_name
,
5350 if (surrounding_global_block
!= NULL
)
5351 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5352 completion_list_add_fields (tracker
, sym
, lookup_name
,
5356 /* Skip macros if we are completing a struct tag -- arguable but
5357 usually what is expected. */
5358 if (current_language
->la_macro_expansion
== macro_expansion_c
5359 && code
== TYPE_CODE_UNDEF
)
5361 gdb::unique_xmalloc_ptr
<struct macro_scope
> scope
;
5363 /* This adds a macro's name to the current completion list. */
5364 auto add_macro_name
= [&] (const char *macro_name
,
5365 const macro_definition
*,
5366 macro_source_file
*,
5369 completion_list_add_name (tracker
, language_c
, macro_name
,
5370 lookup_name
, sym_text
, word
);
5373 /* Add any macros visible in the default scope. Note that this
5374 may yield the occasional wrong result, because an expression
5375 might be evaluated in a scope other than the default. For
5376 example, if the user types "break file:line if <TAB>", the
5377 resulting expression will be evaluated at "file:line" -- but
5378 at there does not seem to be a way to detect this at
5380 scope
= default_macro_scope ();
5382 macro_for_each_in_scope (scope
->file
, scope
->line
,
5385 /* User-defined macros are always visible. */
5386 macro_for_each (macro_user_macros
, add_macro_name
);
5391 default_collect_symbol_completion_matches (completion_tracker
&tracker
,
5392 complete_symbol_mode mode
,
5393 symbol_name_match_type name_match_type
,
5394 const char *text
, const char *word
,
5395 enum type_code code
)
5397 return default_collect_symbol_completion_matches_break_on (tracker
, mode
,
5403 /* Collect all symbols (regardless of class) which begin by matching
5407 collect_symbol_completion_matches (completion_tracker
&tracker
,
5408 complete_symbol_mode mode
,
5409 symbol_name_match_type name_match_type
,
5410 const char *text
, const char *word
)
5412 current_language
->la_collect_symbol_completion_matches (tracker
, mode
,
5418 /* Like collect_symbol_completion_matches, but only collect
5419 STRUCT_DOMAIN symbols whose type code is CODE. */
5422 collect_symbol_completion_matches_type (completion_tracker
&tracker
,
5423 const char *text
, const char *word
,
5424 enum type_code code
)
5426 complete_symbol_mode mode
= complete_symbol_mode::EXPRESSION
;
5427 symbol_name_match_type name_match_type
= symbol_name_match_type::EXPRESSION
;
5429 gdb_assert (code
== TYPE_CODE_UNION
5430 || code
== TYPE_CODE_STRUCT
5431 || code
== TYPE_CODE_ENUM
);
5432 current_language
->la_collect_symbol_completion_matches (tracker
, mode
,
5437 /* Like collect_symbol_completion_matches, but collects a list of
5438 symbols defined in all source files named SRCFILE. */
5441 collect_file_symbol_completion_matches (completion_tracker
&tracker
,
5442 complete_symbol_mode mode
,
5443 symbol_name_match_type name_match_type
,
5444 const char *text
, const char *word
,
5445 const char *srcfile
)
5447 /* The symbol we are completing on. Points in same buffer as text. */
5448 const char *sym_text
;
5450 /* Now look for the symbol we are supposed to complete on.
5451 FIXME: This should be language-specific. */
5452 if (mode
== complete_symbol_mode::LINESPEC
)
5458 const char *quote_pos
= NULL
;
5460 /* First see if this is a quoted string. */
5462 for (p
= text
; *p
!= '\0'; ++p
)
5464 if (quote_found
!= '\0')
5466 if (*p
== quote_found
)
5467 /* Found close quote. */
5469 else if (*p
== '\\' && p
[1] == quote_found
)
5470 /* A backslash followed by the quote character
5471 doesn't end the string. */
5474 else if (*p
== '\'' || *p
== '"')
5480 if (quote_found
== '\'')
5481 /* A string within single quotes can be a symbol, so complete on it. */
5482 sym_text
= quote_pos
+ 1;
5483 else if (quote_found
== '"')
5484 /* A double-quoted string is never a symbol, nor does it make sense
5485 to complete it any other way. */
5491 /* Not a quoted string. */
5492 sym_text
= language_search_unquoted_string (text
, p
);
5496 lookup_name_info
lookup_name (sym_text
, name_match_type
, true);
5498 /* Go through symtabs for SRCFILE and check the externs and statics
5499 for symbols which match. */
5500 iterate_over_symtabs (srcfile
, [&] (symtab
*s
)
5502 add_symtab_completions (SYMTAB_COMPUNIT (s
),
5503 tracker
, mode
, lookup_name
,
5504 sym_text
, word
, TYPE_CODE_UNDEF
);
5509 /* A helper function for make_source_files_completion_list. It adds
5510 another file name to a list of possible completions, growing the
5511 list as necessary. */
5514 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5515 completion_list
*list
)
5517 list
->emplace_back (make_completion_match_str (fname
, text
, word
));
5521 not_interesting_fname (const char *fname
)
5523 static const char *illegal_aliens
[] = {
5524 "_globals_", /* inserted by coff_symtab_read */
5529 for (i
= 0; illegal_aliens
[i
]; i
++)
5531 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5537 /* An object of this type is passed as the user_data argument to
5538 map_partial_symbol_filenames. */
5539 struct add_partial_filename_data
5541 struct filename_seen_cache
*filename_seen_cache
;
5545 completion_list
*list
;
5548 /* A callback for map_partial_symbol_filenames. */
5551 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5554 struct add_partial_filename_data
*data
5555 = (struct add_partial_filename_data
*) user_data
;
5557 if (not_interesting_fname (filename
))
5559 if (!data
->filename_seen_cache
->seen (filename
)
5560 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5562 /* This file matches for a completion; add it to the
5563 current list of matches. */
5564 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5568 const char *base_name
= lbasename (filename
);
5570 if (base_name
!= filename
5571 && !data
->filename_seen_cache
->seen (base_name
)
5572 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5573 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5577 /* Return a list of all source files whose names begin with matching
5578 TEXT. The file names are looked up in the symbol tables of this
5582 make_source_files_completion_list (const char *text
, const char *word
)
5584 struct objfile
*objfile
;
5585 size_t text_len
= strlen (text
);
5586 completion_list list
;
5587 const char *base_name
;
5588 struct add_partial_filename_data datum
;
5590 if (!have_full_symbols () && !have_partial_symbols ())
5593 filename_seen_cache filenames_seen
;
5595 ALL_FILETABS (objfile
, cu
, s
)
5597 if (not_interesting_fname (s
->filename
))
5599 if (!filenames_seen
.seen (s
->filename
)
5600 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5602 /* This file matches for a completion; add it to the current
5604 add_filename_to_list (s
->filename
, text
, word
, &list
);
5608 /* NOTE: We allow the user to type a base name when the
5609 debug info records leading directories, but not the other
5610 way around. This is what subroutines of breakpoint
5611 command do when they parse file names. */
5612 base_name
= lbasename (s
->filename
);
5613 if (base_name
!= s
->filename
5614 && !filenames_seen
.seen (base_name
)
5615 && filename_ncmp (base_name
, text
, text_len
) == 0)
5616 add_filename_to_list (base_name
, text
, word
, &list
);
5620 datum
.filename_seen_cache
= &filenames_seen
;
5623 datum
.text_len
= text_len
;
5625 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5626 0 /*need_fullname*/);
5633 /* Return the "main_info" object for the current program space. If
5634 the object has not yet been created, create it and fill in some
5637 static struct main_info
*
5638 get_main_info (void)
5640 struct main_info
*info
5641 = (struct main_info
*) program_space_data (current_program_space
,
5642 main_progspace_key
);
5646 /* It may seem strange to store the main name in the progspace
5647 and also in whatever objfile happens to see a main name in
5648 its debug info. The reason for this is mainly historical:
5649 gdb returned "main" as the name even if no function named
5650 "main" was defined the program; and this approach lets us
5651 keep compatibility. */
5652 info
= XCNEW (struct main_info
);
5653 info
->language_of_main
= language_unknown
;
5654 set_program_space_data (current_program_space
, main_progspace_key
,
5661 /* A cleanup to destroy a struct main_info when a progspace is
5665 main_info_cleanup (struct program_space
*pspace
, void *data
)
5667 struct main_info
*info
= (struct main_info
*) data
;
5670 xfree (info
->name_of_main
);
5675 set_main_name (const char *name
, enum language lang
)
5677 struct main_info
*info
= get_main_info ();
5679 if (info
->name_of_main
!= NULL
)
5681 xfree (info
->name_of_main
);
5682 info
->name_of_main
= NULL
;
5683 info
->language_of_main
= language_unknown
;
5687 info
->name_of_main
= xstrdup (name
);
5688 info
->language_of_main
= lang
;
5692 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5696 find_main_name (void)
5698 const char *new_main_name
;
5700 /* First check the objfiles to see whether a debuginfo reader has
5701 picked up the appropriate main name. Historically the main name
5702 was found in a more or less random way; this approach instead
5703 relies on the order of objfile creation -- which still isn't
5704 guaranteed to get the correct answer, but is just probably more
5706 for (objfile
*objfile
: all_objfiles (current_program_space
))
5708 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5710 set_main_name (objfile
->per_bfd
->name_of_main
,
5711 objfile
->per_bfd
->language_of_main
);
5716 /* Try to see if the main procedure is in Ada. */
5717 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5718 be to add a new method in the language vector, and call this
5719 method for each language until one of them returns a non-empty
5720 name. This would allow us to remove this hard-coded call to
5721 an Ada function. It is not clear that this is a better approach
5722 at this point, because all methods need to be written in a way
5723 such that false positives never be returned. For instance, it is
5724 important that a method does not return a wrong name for the main
5725 procedure if the main procedure is actually written in a different
5726 language. It is easy to guaranty this with Ada, since we use a
5727 special symbol generated only when the main in Ada to find the name
5728 of the main procedure. It is difficult however to see how this can
5729 be guarantied for languages such as C, for instance. This suggests
5730 that order of call for these methods becomes important, which means
5731 a more complicated approach. */
5732 new_main_name
= ada_main_name ();
5733 if (new_main_name
!= NULL
)
5735 set_main_name (new_main_name
, language_ada
);
5739 new_main_name
= d_main_name ();
5740 if (new_main_name
!= NULL
)
5742 set_main_name (new_main_name
, language_d
);
5746 new_main_name
= go_main_name ();
5747 if (new_main_name
!= NULL
)
5749 set_main_name (new_main_name
, language_go
);
5753 new_main_name
= pascal_main_name ();
5754 if (new_main_name
!= NULL
)
5756 set_main_name (new_main_name
, language_pascal
);
5760 /* The languages above didn't identify the name of the main procedure.
5761 Fallback to "main". */
5762 set_main_name ("main", language_unknown
);
5768 struct main_info
*info
= get_main_info ();
5770 if (info
->name_of_main
== NULL
)
5773 return info
->name_of_main
;
5776 /* Return the language of the main function. If it is not known,
5777 return language_unknown. */
5780 main_language (void)
5782 struct main_info
*info
= get_main_info ();
5784 if (info
->name_of_main
== NULL
)
5787 return info
->language_of_main
;
5790 /* Handle ``executable_changed'' events for the symtab module. */
5793 symtab_observer_executable_changed (void)
5795 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5796 set_main_name (NULL
, language_unknown
);
5799 /* Return 1 if the supplied producer string matches the ARM RealView
5800 compiler (armcc). */
5803 producer_is_realview (const char *producer
)
5805 static const char *const arm_idents
[] = {
5806 "ARM C Compiler, ADS",
5807 "Thumb C Compiler, ADS",
5808 "ARM C++ Compiler, ADS",
5809 "Thumb C++ Compiler, ADS",
5810 "ARM/Thumb C/C++ Compiler, RVCT",
5811 "ARM C/C++ Compiler, RVCT"
5815 if (producer
== NULL
)
5818 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5819 if (startswith (producer
, arm_idents
[i
]))
5827 /* The next index to hand out in response to a registration request. */
5829 static int next_aclass_value
= LOC_FINAL_VALUE
;
5831 /* The maximum number of "aclass" registrations we support. This is
5832 constant for convenience. */
5833 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5835 /* The objects representing the various "aclass" values. The elements
5836 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5837 elements are those registered at gdb initialization time. */
5839 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
5841 /* The globally visible pointer. This is separate from 'symbol_impl'
5842 so that it can be const. */
5844 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
5846 /* Make sure we saved enough room in struct symbol. */
5848 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
5850 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5851 is the ops vector associated with this index. This returns the new
5852 index, which should be used as the aclass_index field for symbols
5856 register_symbol_computed_impl (enum address_class aclass
,
5857 const struct symbol_computed_ops
*ops
)
5859 int result
= next_aclass_value
++;
5861 gdb_assert (aclass
== LOC_COMPUTED
);
5862 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5863 symbol_impl
[result
].aclass
= aclass
;
5864 symbol_impl
[result
].ops_computed
= ops
;
5866 /* Sanity check OPS. */
5867 gdb_assert (ops
!= NULL
);
5868 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
5869 gdb_assert (ops
->describe_location
!= NULL
);
5870 gdb_assert (ops
->get_symbol_read_needs
!= NULL
);
5871 gdb_assert (ops
->read_variable
!= NULL
);
5876 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5877 OPS is the ops vector associated with this index. This returns the
5878 new index, which should be used as the aclass_index field for symbols
5882 register_symbol_block_impl (enum address_class aclass
,
5883 const struct symbol_block_ops
*ops
)
5885 int result
= next_aclass_value
++;
5887 gdb_assert (aclass
== LOC_BLOCK
);
5888 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5889 symbol_impl
[result
].aclass
= aclass
;
5890 symbol_impl
[result
].ops_block
= ops
;
5892 /* Sanity check OPS. */
5893 gdb_assert (ops
!= NULL
);
5894 gdb_assert (ops
->find_frame_base_location
!= NULL
);
5899 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5900 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5901 this index. This returns the new index, which should be used as
5902 the aclass_index field for symbols of this type. */
5905 register_symbol_register_impl (enum address_class aclass
,
5906 const struct symbol_register_ops
*ops
)
5908 int result
= next_aclass_value
++;
5910 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
5911 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5912 symbol_impl
[result
].aclass
= aclass
;
5913 symbol_impl
[result
].ops_register
= ops
;
5918 /* Initialize elements of 'symbol_impl' for the constants in enum
5922 initialize_ordinary_address_classes (void)
5926 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
5927 symbol_impl
[i
].aclass
= (enum address_class
) i
;
5932 /* Helper function to initialize the fields of an objfile-owned symbol.
5933 It assumed that *SYM is already all zeroes. */
5936 initialize_objfile_symbol_1 (struct symbol
*sym
)
5938 SYMBOL_OBJFILE_OWNED (sym
) = 1;
5939 SYMBOL_SECTION (sym
) = -1;
5942 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
5945 initialize_objfile_symbol (struct symbol
*sym
)
5947 memset (sym
, 0, sizeof (*sym
));
5948 initialize_objfile_symbol_1 (sym
);
5951 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
5955 allocate_symbol (struct objfile
*objfile
)
5957 struct symbol
*result
;
5959 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5960 initialize_objfile_symbol_1 (result
);
5965 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
5968 struct template_symbol
*
5969 allocate_template_symbol (struct objfile
*objfile
)
5971 struct template_symbol
*result
;
5973 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
5974 initialize_objfile_symbol_1 (result
);
5982 symbol_objfile (const struct symbol
*symbol
)
5984 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
5985 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
5991 symbol_arch (const struct symbol
*symbol
)
5993 if (!SYMBOL_OBJFILE_OWNED (symbol
))
5994 return symbol
->owner
.arch
;
5995 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6001 symbol_symtab (const struct symbol
*symbol
)
6003 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6004 return symbol
->owner
.symtab
;
6010 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6012 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6013 symbol
->owner
.symtab
= symtab
;
6019 _initialize_symtab (void)
6021 initialize_ordinary_address_classes ();
6024 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6027 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6029 add_info ("variables", info_variables_command
,
6030 info_print_args_help (_("\
6031 All global and static variable names or those matching REGEXPs.\n\
6032 Usage: info variables [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6033 Prints the global and static variables.\n"),
6034 _("global and static variables")));
6036 add_com ("whereis", class_info
, info_variables_command
,
6037 info_print_args_help (_("\
6038 All global and static variable names, or those matching REGEXPs.\n\
6039 Usage: whereis [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6040 Prints the global and static variables.\n"),
6041 _("global and static variables")));
6043 add_info ("functions", info_functions_command
,
6044 info_print_args_help (_("\
6045 All function names or those matching REGEXPs.\n\
6046 Usage: info functions [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\
6047 Prints the functions.\n"),
6050 /* FIXME: This command has at least the following problems:
6051 1. It prints builtin types (in a very strange and confusing fashion).
6052 2. It doesn't print right, e.g. with
6053 typedef struct foo *FOO
6054 type_print prints "FOO" when we want to make it (in this situation)
6055 print "struct foo *".
6056 I also think "ptype" or "whatis" is more likely to be useful (but if
6057 there is much disagreement "info types" can be fixed). */
6058 add_info ("types", info_types_command
,
6059 _("All type names, or those matching REGEXP."));
6061 add_info ("sources", info_sources_command
,
6062 _("Source files in the program."));
6064 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6065 _("Set a breakpoint for all functions matching REGEXP."));
6067 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6068 multiple_symbols_modes
, &multiple_symbols_mode
,
6070 Set the debugger behavior when more than one symbol are possible matches\n\
6071 in an expression."), _("\
6072 Show how the debugger handles ambiguities in expressions."), _("\
6073 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6074 NULL
, NULL
, &setlist
, &showlist
);
6076 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6077 &basenames_may_differ
, _("\
6078 Set whether a source file may have multiple base names."), _("\
6079 Show whether a source file may have multiple base names."), _("\
6080 (A \"base name\" is the name of a file with the directory part removed.\n\
6081 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6082 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6083 before comparing them. Canonicalization is an expensive operation,\n\
6084 but it allows the same file be known by more than one base name.\n\
6085 If not set (the default), all source files are assumed to have just\n\
6086 one base name, and gdb will do file name comparisons more efficiently."),
6088 &setlist
, &showlist
);
6090 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6091 _("Set debugging of symbol table creation."),
6092 _("Show debugging of symbol table creation."), _("\
6093 When enabled (non-zero), debugging messages are printed when building\n\
6094 symbol tables. A value of 1 (one) normally provides enough information.\n\
6095 A value greater than 1 provides more verbose information."),
6098 &setdebuglist
, &showdebuglist
);
6100 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6102 Set debugging of symbol lookup."), _("\
6103 Show debugging of symbol lookup."), _("\
6104 When enabled (non-zero), symbol lookups are logged."),
6106 &setdebuglist
, &showdebuglist
);
6108 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6109 &new_symbol_cache_size
,
6110 _("Set the size of the symbol cache."),
6111 _("Show the size of the symbol cache."), _("\
6112 The size of the symbol cache.\n\
6113 If zero then the symbol cache is disabled."),
6114 set_symbol_cache_size_handler
, NULL
,
6115 &maintenance_set_cmdlist
,
6116 &maintenance_show_cmdlist
);
6118 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6119 _("Dump the symbol cache for each program space."),
6120 &maintenanceprintlist
);
6122 add_cmd ("symbol-cache-statistics", class_maintenance
,
6123 maintenance_print_symbol_cache_statistics
,
6124 _("Print symbol cache statistics for each program space."),
6125 &maintenanceprintlist
);
6127 add_cmd ("flush-symbol-cache", class_maintenance
,
6128 maintenance_flush_symbol_cache
,
6129 _("Flush the symbol cache for each program space."),
6132 gdb::observers::executable_changed
.attach (symtab_observer_executable_changed
);
6133 gdb::observers::new_objfile
.attach (symtab_new_objfile_observer
);
6134 gdb::observers::free_objfile
.attach (symtab_free_objfile_observer
);