1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2017 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"
47 #include "gdb_obstack.h"
49 #include "dictionary.h"
51 #include <sys/types.h>
56 #include "cp-support.h"
60 #include "macroscope.h"
62 #include "parser-defs.h"
63 #include "completer.h"
64 #include "progspace-and-thread.h"
65 #include "common/gdb_optional.h"
67 /* Forward declarations for local functions. */
69 static void rbreak_command (char *, int);
71 static int find_line_common (struct linetable
*, int, int *, int);
73 static struct block_symbol
74 lookup_symbol_aux (const char *name
,
75 const struct block
*block
,
76 const domain_enum domain
,
77 enum language language
,
78 struct field_of_this_result
*);
81 struct block_symbol
lookup_local_symbol (const char *name
,
82 const struct block
*block
,
83 const domain_enum domain
,
84 enum language language
);
86 static struct block_symbol
87 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
88 const char *name
, const domain_enum domain
);
91 const struct block_symbol null_block_symbol
= { NULL
, NULL
};
93 extern initialize_file_ftype _initialize_symtab
;
95 /* Program space key for finding name and language of "main". */
97 static const struct program_space_data
*main_progspace_key
;
99 /* Type of the data stored on the program space. */
103 /* Name of "main". */
107 /* Language of "main". */
109 enum language language_of_main
;
112 /* Program space key for finding its symbol cache. */
114 static const struct program_space_data
*symbol_cache_key
;
116 /* The default symbol cache size.
117 There is no extra cpu cost for large N (except when flushing the cache,
118 which is rare). The value here is just a first attempt. A better default
119 value may be higher or lower. A prime number can make up for a bad hash
120 computation, so that's why the number is what it is. */
121 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
123 /* The maximum symbol cache size.
124 There's no method to the decision of what value to use here, other than
125 there's no point in allowing a user typo to make gdb consume all memory. */
126 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
128 /* symbol_cache_lookup returns this if a previous lookup failed to find the
129 symbol in any objfile. */
130 #define SYMBOL_LOOKUP_FAILED \
131 ((struct block_symbol) {(struct symbol *) 1, NULL})
132 #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)
134 /* Recording lookups that don't find the symbol is just as important, if not
135 more so, than recording found symbols. */
137 enum symbol_cache_slot_state
140 SYMBOL_SLOT_NOT_FOUND
,
144 struct symbol_cache_slot
146 enum symbol_cache_slot_state state
;
148 /* The objfile that was current when the symbol was looked up.
149 This is only needed for global blocks, but for simplicity's sake
150 we allocate the space for both. If data shows the extra space used
151 for static blocks is a problem, we can split things up then.
153 Global blocks need cache lookup to include the objfile context because
154 we need to account for gdbarch_iterate_over_objfiles_in_search_order
155 which can traverse objfiles in, effectively, any order, depending on
156 the current objfile, thus affecting which symbol is found. Normally,
157 only the current objfile is searched first, and then the rest are
158 searched in recorded order; but putting cache lookup inside
159 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
160 Instead we just make the current objfile part of the context of
161 cache lookup. This means we can record the same symbol multiple times,
162 each with a different "current objfile" that was in effect when the
163 lookup was saved in the cache, but cache space is pretty cheap. */
164 const struct objfile
*objfile_context
;
168 struct block_symbol found
;
177 /* Symbols don't specify global vs static block.
178 So keep them in separate caches. */
180 struct block_symbol_cache
184 unsigned int collisions
;
186 /* SYMBOLS is a variable length array of this size.
187 One can imagine that in general one cache (global/static) should be a
188 fraction of the size of the other, but there's no data at the moment
189 on which to decide. */
192 struct symbol_cache_slot symbols
[1];
197 Searching for symbols in the static and global blocks over multiple objfiles
198 again and again can be slow, as can searching very big objfiles. This is a
199 simple cache to improve symbol lookup performance, which is critical to
200 overall gdb performance.
202 Symbols are hashed on the name, its domain, and block.
203 They are also hashed on their objfile for objfile-specific lookups. */
207 struct block_symbol_cache
*global_symbols
;
208 struct block_symbol_cache
*static_symbols
;
211 /* When non-zero, print debugging messages related to symtab creation. */
212 unsigned int symtab_create_debug
= 0;
214 /* When non-zero, print debugging messages related to symbol lookup. */
215 unsigned int symbol_lookup_debug
= 0;
217 /* The size of the cache is staged here. */
218 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
220 /* The current value of the symbol cache size.
221 This is saved so that if the user enters a value too big we can restore
222 the original value from here. */
223 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
225 /* Non-zero if a file may be known by two different basenames.
226 This is the uncommon case, and significantly slows down gdb.
227 Default set to "off" to not slow down the common case. */
228 int basenames_may_differ
= 0;
230 /* Allow the user to configure the debugger behavior with respect
231 to multiple-choice menus when more than one symbol matches during
234 const char multiple_symbols_ask
[] = "ask";
235 const char multiple_symbols_all
[] = "all";
236 const char multiple_symbols_cancel
[] = "cancel";
237 static const char *const multiple_symbols_modes
[] =
239 multiple_symbols_ask
,
240 multiple_symbols_all
,
241 multiple_symbols_cancel
,
244 static const char *multiple_symbols_mode
= multiple_symbols_all
;
246 /* Read-only accessor to AUTO_SELECT_MODE. */
249 multiple_symbols_select_mode (void)
251 return multiple_symbols_mode
;
254 /* Return the name of a domain_enum. */
257 domain_name (domain_enum e
)
261 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
262 case VAR_DOMAIN
: return "VAR_DOMAIN";
263 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
264 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
265 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
266 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
267 default: gdb_assert_not_reached ("bad domain_enum");
271 /* Return the name of a search_domain . */
274 search_domain_name (enum search_domain e
)
278 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
279 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
280 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
281 case ALL_DOMAIN
: return "ALL_DOMAIN";
282 default: gdb_assert_not_reached ("bad search_domain");
289 compunit_primary_filetab (const struct compunit_symtab
*cust
)
291 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
293 /* The primary file symtab is the first one in the list. */
294 return COMPUNIT_FILETABS (cust
);
300 compunit_language (const struct compunit_symtab
*cust
)
302 struct symtab
*symtab
= compunit_primary_filetab (cust
);
304 /* The language of the compunit symtab is the language of its primary
306 return SYMTAB_LANGUAGE (symtab
);
309 /* See whether FILENAME matches SEARCH_NAME using the rule that we
310 advertise to the user. (The manual's description of linespecs
311 describes what we advertise). Returns true if they match, false
315 compare_filenames_for_search (const char *filename
, const char *search_name
)
317 int len
= strlen (filename
);
318 size_t search_len
= strlen (search_name
);
320 if (len
< search_len
)
323 /* The tail of FILENAME must match. */
324 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
327 /* Either the names must completely match, or the character
328 preceding the trailing SEARCH_NAME segment of FILENAME must be a
331 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
332 cannot match FILENAME "/path//dir/file.c" - as user has requested
333 absolute path. The sama applies for "c:\file.c" possibly
334 incorrectly hypothetically matching "d:\dir\c:\file.c".
336 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
337 compatible with SEARCH_NAME "file.c". In such case a compiler had
338 to put the "c:file.c" name into debug info. Such compatibility
339 works only on GDB built for DOS host. */
340 return (len
== search_len
341 || (!IS_ABSOLUTE_PATH (search_name
)
342 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
343 || (HAS_DRIVE_SPEC (filename
)
344 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
347 /* Same as compare_filenames_for_search, but for glob-style patterns.
348 Heads up on the order of the arguments. They match the order of
349 compare_filenames_for_search, but it's the opposite of the order of
350 arguments to gdb_filename_fnmatch. */
353 compare_glob_filenames_for_search (const char *filename
,
354 const char *search_name
)
356 /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
357 all /s have to be explicitly specified. */
358 int file_path_elements
= count_path_elements (filename
);
359 int search_path_elements
= count_path_elements (search_name
);
361 if (search_path_elements
> file_path_elements
)
364 if (IS_ABSOLUTE_PATH (search_name
))
366 return (search_path_elements
== file_path_elements
367 && gdb_filename_fnmatch (search_name
, filename
,
368 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0);
372 const char *file_to_compare
373 = strip_leading_path_elements (filename
,
374 file_path_elements
- search_path_elements
);
376 return gdb_filename_fnmatch (search_name
, file_to_compare
,
377 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0;
381 /* Check for a symtab of a specific name by searching some symtabs.
382 This is a helper function for callbacks of iterate_over_symtabs.
384 If NAME is not absolute, then REAL_PATH is NULL
385 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
387 The return value, NAME, REAL_PATH and CALLBACK are identical to the
388 `map_symtabs_matching_filename' method of quick_symbol_functions.
390 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
391 Each symtab within the specified compunit symtab is also searched.
392 AFTER_LAST is one past the last compunit symtab to search; NULL means to
393 search until the end of the list. */
396 iterate_over_some_symtabs (const char *name
,
397 const char *real_path
,
398 struct compunit_symtab
*first
,
399 struct compunit_symtab
*after_last
,
400 gdb::function_view
<bool (symtab
*)> callback
)
402 struct compunit_symtab
*cust
;
404 const char* base_name
= lbasename (name
);
406 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
408 ALL_COMPUNIT_FILETABS (cust
, s
)
410 if (compare_filenames_for_search (s
->filename
, name
))
417 /* Before we invoke realpath, which can get expensive when many
418 files are involved, do a quick comparison of the basenames. */
419 if (! basenames_may_differ
420 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
423 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
430 /* If the user gave us an absolute path, try to find the file in
431 this symtab and use its absolute path. */
432 if (real_path
!= NULL
)
434 const char *fullname
= symtab_to_fullname (s
);
436 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
437 gdb_assert (IS_ABSOLUTE_PATH (name
));
438 if (FILENAME_CMP (real_path
, fullname
) == 0)
451 /* Check for a symtab of a specific name; first in symtabs, then in
452 psymtabs. *If* there is no '/' in the name, a match after a '/'
453 in the symtab filename will also work.
455 Calls CALLBACK with each symtab that is found. If CALLBACK returns
456 true, the search stops. */
459 iterate_over_symtabs (const char *name
,
460 gdb::function_view
<bool (symtab
*)> callback
)
462 struct objfile
*objfile
;
463 gdb::unique_xmalloc_ptr
<char> real_path
;
465 /* Here we are interested in canonicalizing an absolute path, not
466 absolutizing a relative path. */
467 if (IS_ABSOLUTE_PATH (name
))
469 real_path
.reset (gdb_realpath (name
));
470 gdb_assert (IS_ABSOLUTE_PATH (real_path
.get ()));
473 ALL_OBJFILES (objfile
)
475 if (iterate_over_some_symtabs (name
, real_path
.get (),
476 objfile
->compunit_symtabs
, NULL
,
481 /* Same search rules as above apply here, but now we look thru the
484 ALL_OBJFILES (objfile
)
487 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
495 /* A wrapper for iterate_over_symtabs that returns the first matching
499 lookup_symtab (const char *name
)
501 struct symtab
*result
= NULL
;
503 iterate_over_symtabs (name
, [&] (symtab
*symtab
)
513 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
514 full method name, which consist of the class name (from T), the unadorned
515 method name from METHOD_ID, and the signature for the specific overload,
516 specified by SIGNATURE_ID. Note that this function is g++ specific. */
519 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
521 int mangled_name_len
;
523 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
524 struct fn_field
*method
= &f
[signature_id
];
525 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
526 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
527 const char *newname
= type_name_no_tag (type
);
529 /* Does the form of physname indicate that it is the full mangled name
530 of a constructor (not just the args)? */
531 int is_full_physname_constructor
;
534 int is_destructor
= is_destructor_name (physname
);
535 /* Need a new type prefix. */
536 const char *const_prefix
= method
->is_const
? "C" : "";
537 const char *volatile_prefix
= method
->is_volatile
? "V" : "";
539 int len
= (newname
== NULL
? 0 : strlen (newname
));
541 /* Nothing to do if physname already contains a fully mangled v3 abi name
542 or an operator name. */
543 if ((physname
[0] == '_' && physname
[1] == 'Z')
544 || is_operator_name (field_name
))
545 return xstrdup (physname
);
547 is_full_physname_constructor
= is_constructor_name (physname
);
549 is_constructor
= is_full_physname_constructor
550 || (newname
&& strcmp (field_name
, newname
) == 0);
553 is_destructor
= (startswith (physname
, "__dt"));
555 if (is_destructor
|| is_full_physname_constructor
)
557 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
558 strcpy (mangled_name
, physname
);
564 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
566 else if (physname
[0] == 't' || physname
[0] == 'Q')
568 /* The physname for template and qualified methods already includes
570 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
576 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
577 volatile_prefix
, len
);
579 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
580 + strlen (buf
) + len
+ strlen (physname
) + 1);
582 mangled_name
= (char *) xmalloc (mangled_name_len
);
584 mangled_name
[0] = '\0';
586 strcpy (mangled_name
, field_name
);
588 strcat (mangled_name
, buf
);
589 /* If the class doesn't have a name, i.e. newname NULL, then we just
590 mangle it using 0 for the length of the class. Thus it gets mangled
591 as something starting with `::' rather than `classname::'. */
593 strcat (mangled_name
, newname
);
595 strcat (mangled_name
, physname
);
596 return (mangled_name
);
599 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
600 correctly allocated. */
603 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
605 struct obstack
*obstack
)
607 if (gsymbol
->language
== language_ada
)
611 gsymbol
->ada_mangled
= 0;
612 gsymbol
->language_specific
.obstack
= obstack
;
616 gsymbol
->ada_mangled
= 1;
617 gsymbol
->language_specific
.demangled_name
= name
;
621 gsymbol
->language_specific
.demangled_name
= name
;
624 /* Return the demangled name of GSYMBOL. */
627 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
629 if (gsymbol
->language
== language_ada
)
631 if (!gsymbol
->ada_mangled
)
636 return gsymbol
->language_specific
.demangled_name
;
640 /* Initialize the language dependent portion of a symbol
641 depending upon the language for the symbol. */
644 symbol_set_language (struct general_symbol_info
*gsymbol
,
645 enum language language
,
646 struct obstack
*obstack
)
648 gsymbol
->language
= language
;
649 if (gsymbol
->language
== language_cplus
650 || gsymbol
->language
== language_d
651 || gsymbol
->language
== language_go
652 || gsymbol
->language
== language_objc
653 || gsymbol
->language
== language_fortran
)
655 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
657 else if (gsymbol
->language
== language_ada
)
659 gdb_assert (gsymbol
->ada_mangled
== 0);
660 gsymbol
->language_specific
.obstack
= obstack
;
664 memset (&gsymbol
->language_specific
, 0,
665 sizeof (gsymbol
->language_specific
));
669 /* Functions to initialize a symbol's mangled name. */
671 /* Objects of this type are stored in the demangled name hash table. */
672 struct demangled_name_entry
678 /* Hash function for the demangled name hash. */
681 hash_demangled_name_entry (const void *data
)
683 const struct demangled_name_entry
*e
684 = (const struct demangled_name_entry
*) data
;
686 return htab_hash_string (e
->mangled
);
689 /* Equality function for the demangled name hash. */
692 eq_demangled_name_entry (const void *a
, const void *b
)
694 const struct demangled_name_entry
*da
695 = (const struct demangled_name_entry
*) a
;
696 const struct demangled_name_entry
*db
697 = (const struct demangled_name_entry
*) b
;
699 return strcmp (da
->mangled
, db
->mangled
) == 0;
702 /* Create the hash table used for demangled names. Each hash entry is
703 a pair of strings; one for the mangled name and one for the demangled
704 name. The entry is hashed via just the mangled name. */
707 create_demangled_names_hash (struct objfile
*objfile
)
709 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
710 The hash table code will round this up to the next prime number.
711 Choosing a much larger table size wastes memory, and saves only about
712 1% in symbol reading. */
714 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
715 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
716 NULL
, xcalloc
, xfree
);
719 /* Try to determine the demangled name for a symbol, based on the
720 language of that symbol. If the language is set to language_auto,
721 it will attempt to find any demangling algorithm that works and
722 then set the language appropriately. The returned name is allocated
723 by the demangler and should be xfree'd. */
726 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
729 char *demangled
= NULL
;
733 if (gsymbol
->language
== language_unknown
)
734 gsymbol
->language
= language_auto
;
736 if (gsymbol
->language
!= language_auto
)
738 const struct language_defn
*lang
= language_def (gsymbol
->language
);
740 language_sniff_from_mangled_name (lang
, mangled
, &demangled
);
744 for (i
= language_unknown
; i
< nr_languages
; ++i
)
746 enum language l
= (enum language
) i
;
747 const struct language_defn
*lang
= language_def (l
);
749 if (language_sniff_from_mangled_name (lang
, mangled
, &demangled
))
751 gsymbol
->language
= l
;
759 /* Set both the mangled and demangled (if any) names for GSYMBOL based
760 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
761 objfile's obstack; but if COPY_NAME is 0 and if NAME is
762 NUL-terminated, then this function assumes that NAME is already
763 correctly saved (either permanently or with a lifetime tied to the
764 objfile), and it will not be copied.
766 The hash table corresponding to OBJFILE is used, and the memory
767 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
768 so the pointer can be discarded after calling this function. */
771 symbol_set_names (struct general_symbol_info
*gsymbol
,
772 const char *linkage_name
, int len
, int copy_name
,
773 struct objfile
*objfile
)
775 struct demangled_name_entry
**slot
;
776 /* A 0-terminated copy of the linkage name. */
777 const char *linkage_name_copy
;
778 struct demangled_name_entry entry
;
779 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
781 if (gsymbol
->language
== language_ada
)
783 /* In Ada, we do the symbol lookups using the mangled name, so
784 we can save some space by not storing the demangled name. */
786 gsymbol
->name
= linkage_name
;
789 char *name
= (char *) obstack_alloc (&per_bfd
->storage_obstack
,
792 memcpy (name
, linkage_name
, len
);
794 gsymbol
->name
= name
;
796 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
801 if (per_bfd
->demangled_names_hash
== NULL
)
802 create_demangled_names_hash (objfile
);
804 if (linkage_name
[len
] != '\0')
808 alloc_name
= (char *) alloca (len
+ 1);
809 memcpy (alloc_name
, linkage_name
, len
);
810 alloc_name
[len
] = '\0';
812 linkage_name_copy
= alloc_name
;
815 linkage_name_copy
= linkage_name
;
817 entry
.mangled
= linkage_name_copy
;
818 slot
= ((struct demangled_name_entry
**)
819 htab_find_slot (per_bfd
->demangled_names_hash
,
822 /* If this name is not in the hash table, add it. */
824 /* A C version of the symbol may have already snuck into the table.
825 This happens to, e.g., main.init (__go_init_main). Cope. */
826 || (gsymbol
->language
== language_go
827 && (*slot
)->demangled
[0] == '\0'))
829 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
831 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
833 /* Suppose we have demangled_name==NULL, copy_name==0, and
834 linkage_name_copy==linkage_name. In this case, we already have the
835 mangled name saved, and we don't have a demangled name. So,
836 you might think we could save a little space by not recording
837 this in the hash table at all.
839 It turns out that it is actually important to still save such
840 an entry in the hash table, because storing this name gives
841 us better bcache hit rates for partial symbols. */
842 if (!copy_name
&& linkage_name_copy
== linkage_name
)
845 = ((struct demangled_name_entry
*)
846 obstack_alloc (&per_bfd
->storage_obstack
,
847 offsetof (struct demangled_name_entry
, demangled
)
848 + demangled_len
+ 1));
849 (*slot
)->mangled
= linkage_name
;
855 /* If we must copy the mangled name, put it directly after
856 the demangled name so we can have a single
859 = ((struct demangled_name_entry
*)
860 obstack_alloc (&per_bfd
->storage_obstack
,
861 offsetof (struct demangled_name_entry
, demangled
)
862 + len
+ demangled_len
+ 2));
863 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
864 strcpy (mangled_ptr
, linkage_name_copy
);
865 (*slot
)->mangled
= mangled_ptr
;
868 if (demangled_name
!= NULL
)
870 strcpy ((*slot
)->demangled
, demangled_name
);
871 xfree (demangled_name
);
874 (*slot
)->demangled
[0] = '\0';
877 gsymbol
->name
= (*slot
)->mangled
;
878 if ((*slot
)->demangled
[0] != '\0')
879 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
880 &per_bfd
->storage_obstack
);
882 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
885 /* Return the source code name of a symbol. In languages where
886 demangling is necessary, this is the demangled name. */
889 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
891 switch (gsymbol
->language
)
897 case language_fortran
:
898 if (symbol_get_demangled_name (gsymbol
) != NULL
)
899 return symbol_get_demangled_name (gsymbol
);
902 return ada_decode_symbol (gsymbol
);
906 return gsymbol
->name
;
909 /* Return the demangled name for a symbol based on the language for
910 that symbol. If no demangled name exists, return NULL. */
913 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
915 const char *dem_name
= NULL
;
917 switch (gsymbol
->language
)
923 case language_fortran
:
924 dem_name
= symbol_get_demangled_name (gsymbol
);
927 dem_name
= ada_decode_symbol (gsymbol
);
935 /* Return the search name of a symbol---generally the demangled or
936 linkage name of the symbol, depending on how it will be searched for.
937 If there is no distinct demangled name, then returns the same value
938 (same pointer) as SYMBOL_LINKAGE_NAME. */
941 symbol_search_name (const struct general_symbol_info
*gsymbol
)
943 if (gsymbol
->language
== language_ada
)
944 return gsymbol
->name
;
946 return symbol_natural_name (gsymbol
);
949 /* Initialize the structure fields to zero values. */
952 init_sal (struct symtab_and_line
*sal
)
954 memset (sal
, 0, sizeof (*sal
));
958 /* Return 1 if the two sections are the same, or if they could
959 plausibly be copies of each other, one in an original object
960 file and another in a separated debug file. */
963 matching_obj_sections (struct obj_section
*obj_first
,
964 struct obj_section
*obj_second
)
966 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
967 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
970 /* If they're the same section, then they match. */
974 /* If either is NULL, give up. */
975 if (first
== NULL
|| second
== NULL
)
978 /* This doesn't apply to absolute symbols. */
979 if (first
->owner
== NULL
|| second
->owner
== NULL
)
982 /* If they're in the same object file, they must be different sections. */
983 if (first
->owner
== second
->owner
)
986 /* Check whether the two sections are potentially corresponding. They must
987 have the same size, address, and name. We can't compare section indexes,
988 which would be more reliable, because some sections may have been
990 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
993 /* In-memory addresses may start at a different offset, relativize them. */
994 if (bfd_get_section_vma (first
->owner
, first
)
995 - bfd_get_start_address (first
->owner
)
996 != bfd_get_section_vma (second
->owner
, second
)
997 - bfd_get_start_address (second
->owner
))
1000 if (bfd_get_section_name (first
->owner
, first
) == NULL
1001 || bfd_get_section_name (second
->owner
, second
) == NULL
1002 || strcmp (bfd_get_section_name (first
->owner
, first
),
1003 bfd_get_section_name (second
->owner
, second
)) != 0)
1006 /* Otherwise check that they are in corresponding objfiles. */
1009 if (obj
->obfd
== first
->owner
)
1011 gdb_assert (obj
!= NULL
);
1013 if (obj
->separate_debug_objfile
!= NULL
1014 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1016 if (obj
->separate_debug_objfile_backlink
!= NULL
1017 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1026 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1028 struct objfile
*objfile
;
1029 struct bound_minimal_symbol msymbol
;
1031 /* If we know that this is not a text address, return failure. This is
1032 necessary because we loop based on texthigh and textlow, which do
1033 not include the data ranges. */
1034 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1036 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1037 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1038 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1039 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1040 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1043 ALL_OBJFILES (objfile
)
1045 struct compunit_symtab
*cust
= NULL
;
1048 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1055 /* Hash function for the symbol cache. */
1058 hash_symbol_entry (const struct objfile
*objfile_context
,
1059 const char *name
, domain_enum domain
)
1061 unsigned int hash
= (uintptr_t) objfile_context
;
1064 hash
+= htab_hash_string (name
);
1066 /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
1067 to map to the same slot. */
1068 if (domain
== STRUCT_DOMAIN
)
1069 hash
+= VAR_DOMAIN
* 7;
1076 /* Equality function for the symbol cache. */
1079 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1080 const struct objfile
*objfile_context
,
1081 const char *name
, domain_enum domain
)
1083 const char *slot_name
;
1084 domain_enum slot_domain
;
1086 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1089 if (slot
->objfile_context
!= objfile_context
)
1092 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1094 slot_name
= slot
->value
.not_found
.name
;
1095 slot_domain
= slot
->value
.not_found
.domain
;
1099 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
.symbol
);
1100 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
.symbol
);
1103 /* NULL names match. */
1104 if (slot_name
== NULL
&& name
== NULL
)
1106 /* But there's no point in calling symbol_matches_domain in the
1107 SYMBOL_SLOT_FOUND case. */
1108 if (slot_domain
!= domain
)
1111 else if (slot_name
!= NULL
&& name
!= NULL
)
1113 /* It's important that we use the same comparison that was done the
1114 first time through. If the slot records a found symbol, then this
1115 means using strcmp_iw on SYMBOL_SEARCH_NAME. See dictionary.c.
1116 It also means using symbol_matches_domain for found symbols.
1119 If the slot records a not-found symbol, then require a precise match.
1120 We could still be lax with whitespace like strcmp_iw though. */
1122 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1124 if (strcmp (slot_name
, name
) != 0)
1126 if (slot_domain
!= domain
)
1131 struct symbol
*sym
= slot
->value
.found
.symbol
;
1133 if (strcmp_iw (slot_name
, name
) != 0)
1135 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1136 slot_domain
, domain
))
1142 /* Only one name is NULL. */
1149 /* Given a cache of size SIZE, return the size of the struct (with variable
1150 length array) in bytes. */
1153 symbol_cache_byte_size (unsigned int size
)
1155 return (sizeof (struct block_symbol_cache
)
1156 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1162 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1164 /* If there's no change in size, don't do anything.
1165 All caches have the same size, so we can just compare with the size
1166 of the global symbols cache. */
1167 if ((cache
->global_symbols
!= NULL
1168 && cache
->global_symbols
->size
== new_size
)
1169 || (cache
->global_symbols
== NULL
1173 xfree (cache
->global_symbols
);
1174 xfree (cache
->static_symbols
);
1178 cache
->global_symbols
= NULL
;
1179 cache
->static_symbols
= NULL
;
1183 size_t total_size
= symbol_cache_byte_size (new_size
);
1185 cache
->global_symbols
1186 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1187 cache
->static_symbols
1188 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1189 cache
->global_symbols
->size
= new_size
;
1190 cache
->static_symbols
->size
= new_size
;
1194 /* Make a symbol cache of size SIZE. */
1196 static struct symbol_cache
*
1197 make_symbol_cache (unsigned int size
)
1199 struct symbol_cache
*cache
;
1201 cache
= XCNEW (struct symbol_cache
);
1202 resize_symbol_cache (cache
, symbol_cache_size
);
1206 /* Free the space used by CACHE. */
1209 free_symbol_cache (struct symbol_cache
*cache
)
1211 xfree (cache
->global_symbols
);
1212 xfree (cache
->static_symbols
);
1216 /* Return the symbol cache of PSPACE.
1217 Create one if it doesn't exist yet. */
1219 static struct symbol_cache
*
1220 get_symbol_cache (struct program_space
*pspace
)
1222 struct symbol_cache
*cache
1223 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1227 cache
= make_symbol_cache (symbol_cache_size
);
1228 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1234 /* Delete the symbol cache of PSPACE.
1235 Called when PSPACE is destroyed. */
1238 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1240 struct symbol_cache
*cache
= (struct symbol_cache
*) data
;
1242 free_symbol_cache (cache
);
1245 /* Set the size of the symbol cache in all program spaces. */
1248 set_symbol_cache_size (unsigned int new_size
)
1250 struct program_space
*pspace
;
1252 ALL_PSPACES (pspace
)
1254 struct symbol_cache
*cache
1255 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1257 /* The pspace could have been created but not have a cache yet. */
1259 resize_symbol_cache (cache
, new_size
);
1263 /* Called when symbol-cache-size is set. */
1266 set_symbol_cache_size_handler (char *args
, int from_tty
,
1267 struct cmd_list_element
*c
)
1269 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1271 /* Restore the previous value.
1272 This is the value the "show" command prints. */
1273 new_symbol_cache_size
= symbol_cache_size
;
1275 error (_("Symbol cache size is too large, max is %u."),
1276 MAX_SYMBOL_CACHE_SIZE
);
1278 symbol_cache_size
= new_symbol_cache_size
;
1280 set_symbol_cache_size (symbol_cache_size
);
1283 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1284 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1285 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1286 failed (and thus this one will too), or NULL if the symbol is not present
1288 If the symbol is not present in the cache, then *BSC_PTR and *SLOT_PTR are
1289 set to the cache and slot of the symbol to save the result of a full lookup
1292 static struct block_symbol
1293 symbol_cache_lookup (struct symbol_cache
*cache
,
1294 struct objfile
*objfile_context
, int block
,
1295 const char *name
, domain_enum domain
,
1296 struct block_symbol_cache
**bsc_ptr
,
1297 struct symbol_cache_slot
**slot_ptr
)
1299 struct block_symbol_cache
*bsc
;
1301 struct symbol_cache_slot
*slot
;
1303 if (block
== GLOBAL_BLOCK
)
1304 bsc
= cache
->global_symbols
;
1306 bsc
= cache
->static_symbols
;
1311 return (struct block_symbol
) {NULL
, NULL
};
1314 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1315 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1317 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1319 if (symbol_lookup_debug
)
1320 fprintf_unfiltered (gdb_stdlog
,
1321 "%s block symbol cache hit%s for %s, %s\n",
1322 block
== GLOBAL_BLOCK
? "Global" : "Static",
1323 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1324 ? " (not found)" : "",
1325 name
, domain_name (domain
));
1327 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1328 return SYMBOL_LOOKUP_FAILED
;
1329 return slot
->value
.found
;
1332 /* Symbol is not present in the cache. */
1337 if (symbol_lookup_debug
)
1339 fprintf_unfiltered (gdb_stdlog
,
1340 "%s block symbol cache miss for %s, %s\n",
1341 block
== GLOBAL_BLOCK
? "Global" : "Static",
1342 name
, domain_name (domain
));
1345 return (struct block_symbol
) {NULL
, NULL
};
1348 /* Clear out SLOT. */
1351 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1353 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1354 xfree (slot
->value
.not_found
.name
);
1355 slot
->state
= SYMBOL_SLOT_UNUSED
;
1358 /* Mark SYMBOL as found in SLOT.
1359 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1360 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1361 necessarily the objfile the symbol was found in. */
1364 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1365 struct symbol_cache_slot
*slot
,
1366 struct objfile
*objfile_context
,
1367 struct symbol
*symbol
,
1368 const struct block
*block
)
1372 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1375 symbol_cache_clear_slot (slot
);
1377 slot
->state
= SYMBOL_SLOT_FOUND
;
1378 slot
->objfile_context
= objfile_context
;
1379 slot
->value
.found
.symbol
= symbol
;
1380 slot
->value
.found
.block
= block
;
1383 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1384 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1385 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1388 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1389 struct symbol_cache_slot
*slot
,
1390 struct objfile
*objfile_context
,
1391 const char *name
, domain_enum domain
)
1395 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1398 symbol_cache_clear_slot (slot
);
1400 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1401 slot
->objfile_context
= objfile_context
;
1402 slot
->value
.not_found
.name
= xstrdup (name
);
1403 slot
->value
.not_found
.domain
= domain
;
1406 /* Flush the symbol cache of PSPACE. */
1409 symbol_cache_flush (struct program_space
*pspace
)
1411 struct symbol_cache
*cache
1412 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1417 if (cache
->global_symbols
== NULL
)
1419 gdb_assert (symbol_cache_size
== 0);
1420 gdb_assert (cache
->static_symbols
== NULL
);
1424 /* If the cache is untouched since the last flush, early exit.
1425 This is important for performance during the startup of a program linked
1426 with 100s (or 1000s) of shared libraries. */
1427 if (cache
->global_symbols
->misses
== 0
1428 && cache
->static_symbols
->misses
== 0)
1431 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1432 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1434 for (pass
= 0; pass
< 2; ++pass
)
1436 struct block_symbol_cache
*bsc
1437 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1440 for (i
= 0; i
< bsc
->size
; ++i
)
1441 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1444 cache
->global_symbols
->hits
= 0;
1445 cache
->global_symbols
->misses
= 0;
1446 cache
->global_symbols
->collisions
= 0;
1447 cache
->static_symbols
->hits
= 0;
1448 cache
->static_symbols
->misses
= 0;
1449 cache
->static_symbols
->collisions
= 0;
1455 symbol_cache_dump (const struct symbol_cache
*cache
)
1459 if (cache
->global_symbols
== NULL
)
1461 printf_filtered (" <disabled>\n");
1465 for (pass
= 0; pass
< 2; ++pass
)
1467 const struct block_symbol_cache
*bsc
1468 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1472 printf_filtered ("Global symbols:\n");
1474 printf_filtered ("Static symbols:\n");
1476 for (i
= 0; i
< bsc
->size
; ++i
)
1478 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1482 switch (slot
->state
)
1484 case SYMBOL_SLOT_UNUSED
:
1486 case SYMBOL_SLOT_NOT_FOUND
:
1487 printf_filtered (" [%4u] = %s, %s %s (not found)\n", i
,
1488 host_address_to_string (slot
->objfile_context
),
1489 slot
->value
.not_found
.name
,
1490 domain_name (slot
->value
.not_found
.domain
));
1492 case SYMBOL_SLOT_FOUND
:
1494 struct symbol
*found
= slot
->value
.found
.symbol
;
1495 const struct objfile
*context
= slot
->objfile_context
;
1497 printf_filtered (" [%4u] = %s, %s %s\n", i
,
1498 host_address_to_string (context
),
1499 SYMBOL_PRINT_NAME (found
),
1500 domain_name (SYMBOL_DOMAIN (found
)));
1508 /* The "mt print symbol-cache" command. */
1511 maintenance_print_symbol_cache (char *args
, int from_tty
)
1513 struct program_space
*pspace
;
1515 ALL_PSPACES (pspace
)
1517 struct symbol_cache
*cache
;
1519 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1521 pspace
->symfile_object_file
!= NULL
1522 ? objfile_name (pspace
->symfile_object_file
)
1523 : "(no object file)");
1525 /* If the cache hasn't been created yet, avoid creating one. */
1527 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1529 printf_filtered (" <empty>\n");
1531 symbol_cache_dump (cache
);
1535 /* The "mt flush-symbol-cache" command. */
1538 maintenance_flush_symbol_cache (char *args
, int from_tty
)
1540 struct program_space
*pspace
;
1542 ALL_PSPACES (pspace
)
1544 symbol_cache_flush (pspace
);
1548 /* Print usage statistics of CACHE. */
1551 symbol_cache_stats (struct symbol_cache
*cache
)
1555 if (cache
->global_symbols
== NULL
)
1557 printf_filtered (" <disabled>\n");
1561 for (pass
= 0; pass
< 2; ++pass
)
1563 const struct block_symbol_cache
*bsc
1564 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1569 printf_filtered ("Global block cache stats:\n");
1571 printf_filtered ("Static block cache stats:\n");
1573 printf_filtered (" size: %u\n", bsc
->size
);
1574 printf_filtered (" hits: %u\n", bsc
->hits
);
1575 printf_filtered (" misses: %u\n", bsc
->misses
);
1576 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1580 /* The "mt print symbol-cache-statistics" command. */
1583 maintenance_print_symbol_cache_statistics (char *args
, int from_tty
)
1585 struct program_space
*pspace
;
1587 ALL_PSPACES (pspace
)
1589 struct symbol_cache
*cache
;
1591 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1593 pspace
->symfile_object_file
!= NULL
1594 ? objfile_name (pspace
->symfile_object_file
)
1595 : "(no object file)");
1597 /* If the cache hasn't been created yet, avoid creating one. */
1599 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1601 printf_filtered (" empty, no stats available\n");
1603 symbol_cache_stats (cache
);
1607 /* This module's 'new_objfile' observer. */
1610 symtab_new_objfile_observer (struct objfile
*objfile
)
1612 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1613 symbol_cache_flush (current_program_space
);
1616 /* This module's 'free_objfile' observer. */
1619 symtab_free_objfile_observer (struct objfile
*objfile
)
1621 symbol_cache_flush (objfile
->pspace
);
1624 /* Debug symbols usually don't have section information. We need to dig that
1625 out of the minimal symbols and stash that in the debug symbol. */
1628 fixup_section (struct general_symbol_info
*ginfo
,
1629 CORE_ADDR addr
, struct objfile
*objfile
)
1631 struct minimal_symbol
*msym
;
1633 /* First, check whether a minimal symbol with the same name exists
1634 and points to the same address. The address check is required
1635 e.g. on PowerPC64, where the minimal symbol for a function will
1636 point to the function descriptor, while the debug symbol will
1637 point to the actual function code. */
1638 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1640 ginfo
->section
= MSYMBOL_SECTION (msym
);
1643 /* Static, function-local variables do appear in the linker
1644 (minimal) symbols, but are frequently given names that won't
1645 be found via lookup_minimal_symbol(). E.g., it has been
1646 observed in frv-uclinux (ELF) executables that a static,
1647 function-local variable named "foo" might appear in the
1648 linker symbols as "foo.6" or "foo.3". Thus, there is no
1649 point in attempting to extend the lookup-by-name mechanism to
1650 handle this case due to the fact that there can be multiple
1653 So, instead, search the section table when lookup by name has
1654 failed. The ``addr'' and ``endaddr'' fields may have already
1655 been relocated. If so, the relocation offset (i.e. the
1656 ANOFFSET value) needs to be subtracted from these values when
1657 performing the comparison. We unconditionally subtract it,
1658 because, when no relocation has been performed, the ANOFFSET
1659 value will simply be zero.
1661 The address of the symbol whose section we're fixing up HAS
1662 NOT BEEN adjusted (relocated) yet. It can't have been since
1663 the section isn't yet known and knowing the section is
1664 necessary in order to add the correct relocation value. In
1665 other words, we wouldn't even be in this function (attempting
1666 to compute the section) if it were already known.
1668 Note that it is possible to search the minimal symbols
1669 (subtracting the relocation value if necessary) to find the
1670 matching minimal symbol, but this is overkill and much less
1671 efficient. It is not necessary to find the matching minimal
1672 symbol, only its section.
1674 Note that this technique (of doing a section table search)
1675 can fail when unrelocated section addresses overlap. For
1676 this reason, we still attempt a lookup by name prior to doing
1677 a search of the section table. */
1679 struct obj_section
*s
;
1682 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1684 int idx
= s
- objfile
->sections
;
1685 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1690 if (obj_section_addr (s
) - offset
<= addr
1691 && addr
< obj_section_endaddr (s
) - offset
)
1693 ginfo
->section
= idx
;
1698 /* If we didn't find the section, assume it is in the first
1699 section. If there is no allocated section, then it hardly
1700 matters what we pick, so just pick zero. */
1704 ginfo
->section
= fallback
;
1709 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1716 if (!SYMBOL_OBJFILE_OWNED (sym
))
1719 /* We either have an OBJFILE, or we can get at it from the sym's
1720 symtab. Anything else is a bug. */
1721 gdb_assert (objfile
|| symbol_symtab (sym
));
1723 if (objfile
== NULL
)
1724 objfile
= symbol_objfile (sym
);
1726 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1729 /* We should have an objfile by now. */
1730 gdb_assert (objfile
);
1732 switch (SYMBOL_CLASS (sym
))
1736 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1739 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1743 /* Nothing else will be listed in the minsyms -- no use looking
1748 fixup_section (&sym
->ginfo
, addr
, objfile
);
1753 /* Compute the demangled form of NAME as used by the various symbol
1754 lookup functions. The result can either be the input NAME
1755 directly, or a pointer to a buffer owned by the STORAGE object.
1757 For Ada, this function just returns NAME, unmodified.
1758 Normally, Ada symbol lookups are performed using the encoded name
1759 rather than the demangled name, and so it might seem to make sense
1760 for this function to return an encoded version of NAME.
1761 Unfortunately, we cannot do this, because this function is used in
1762 circumstances where it is not appropriate to try to encode NAME.
1763 For instance, when displaying the frame info, we demangle the name
1764 of each parameter, and then perform a symbol lookup inside our
1765 function using that demangled name. In Ada, certain functions
1766 have internally-generated parameters whose name contain uppercase
1767 characters. Encoding those name would result in those uppercase
1768 characters to become lowercase, and thus cause the symbol lookup
1772 demangle_for_lookup (const char *name
, enum language lang
,
1773 demangle_result_storage
&storage
)
1775 /* If we are using C++, D, or Go, demangle the name before doing a
1776 lookup, so we can always binary search. */
1777 if (lang
== language_cplus
)
1779 char *demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1780 if (demangled_name
!= NULL
)
1781 return storage
.set_malloc_ptr (demangled_name
);
1783 /* If we were given a non-mangled name, canonicalize it
1784 according to the language (so far only for C++). */
1785 std::string canon
= cp_canonicalize_string (name
);
1786 if (!canon
.empty ())
1787 return storage
.swap_string (canon
);
1789 else if (lang
== language_d
)
1791 char *demangled_name
= d_demangle (name
, 0);
1792 if (demangled_name
!= NULL
)
1793 return storage
.set_malloc_ptr (demangled_name
);
1795 else if (lang
== language_go
)
1797 char *demangled_name
= go_demangle (name
, 0);
1798 if (demangled_name
!= NULL
)
1799 return storage
.set_malloc_ptr (demangled_name
);
1807 This function (or rather its subordinates) have a bunch of loops and
1808 it would seem to be attractive to put in some QUIT's (though I'm not really
1809 sure whether it can run long enough to be really important). But there
1810 are a few calls for which it would appear to be bad news to quit
1811 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1812 that there is C++ code below which can error(), but that probably
1813 doesn't affect these calls since they are looking for a known
1814 variable and thus can probably assume it will never hit the C++
1818 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1819 const domain_enum domain
, enum language lang
,
1820 struct field_of_this_result
*is_a_field_of_this
)
1822 demangle_result_storage storage
;
1823 const char *modified_name
= demangle_for_lookup (name
, lang
, storage
);
1825 return lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1826 is_a_field_of_this
);
1832 lookup_symbol (const char *name
, const struct block
*block
,
1834 struct field_of_this_result
*is_a_field_of_this
)
1836 return lookup_symbol_in_language (name
, block
, domain
,
1837 current_language
->la_language
,
1838 is_a_field_of_this
);
1844 lookup_language_this (const struct language_defn
*lang
,
1845 const struct block
*block
)
1847 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1848 return (struct block_symbol
) {NULL
, NULL
};
1850 if (symbol_lookup_debug
> 1)
1852 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1854 fprintf_unfiltered (gdb_stdlog
,
1855 "lookup_language_this (%s, %s (objfile %s))",
1856 lang
->la_name
, host_address_to_string (block
),
1857 objfile_debug_name (objfile
));
1864 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1867 if (symbol_lookup_debug
> 1)
1869 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1870 SYMBOL_PRINT_NAME (sym
),
1871 host_address_to_string (sym
),
1872 host_address_to_string (block
));
1874 return (struct block_symbol
) {sym
, block
};
1876 if (BLOCK_FUNCTION (block
))
1878 block
= BLOCK_SUPERBLOCK (block
);
1881 if (symbol_lookup_debug
> 1)
1882 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
1883 return (struct block_symbol
) {NULL
, NULL
};
1886 /* Given TYPE, a structure/union,
1887 return 1 if the component named NAME from the ultimate target
1888 structure/union is defined, otherwise, return 0. */
1891 check_field (struct type
*type
, const char *name
,
1892 struct field_of_this_result
*is_a_field_of_this
)
1896 /* The type may be a stub. */
1897 type
= check_typedef (type
);
1899 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1901 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1903 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1905 is_a_field_of_this
->type
= type
;
1906 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1911 /* C++: If it was not found as a data field, then try to return it
1912 as a pointer to a method. */
1914 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1916 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1918 is_a_field_of_this
->type
= type
;
1919 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1924 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1925 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
1931 /* Behave like lookup_symbol except that NAME is the natural name
1932 (e.g., demangled name) of the symbol that we're looking for. */
1934 static struct block_symbol
1935 lookup_symbol_aux (const char *name
, const struct block
*block
,
1936 const domain_enum domain
, enum language language
,
1937 struct field_of_this_result
*is_a_field_of_this
)
1939 struct block_symbol result
;
1940 const struct language_defn
*langdef
;
1942 if (symbol_lookup_debug
)
1944 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1946 fprintf_unfiltered (gdb_stdlog
,
1947 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
1948 name
, host_address_to_string (block
),
1950 ? objfile_debug_name (objfile
) : "NULL",
1951 domain_name (domain
), language_str (language
));
1954 /* Make sure we do something sensible with is_a_field_of_this, since
1955 the callers that set this parameter to some non-null value will
1956 certainly use it later. If we don't set it, the contents of
1957 is_a_field_of_this are undefined. */
1958 if (is_a_field_of_this
!= NULL
)
1959 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
1961 /* Search specified block and its superiors. Don't search
1962 STATIC_BLOCK or GLOBAL_BLOCK. */
1964 result
= lookup_local_symbol (name
, block
, domain
, language
);
1965 if (result
.symbol
!= NULL
)
1967 if (symbol_lookup_debug
)
1969 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
1970 host_address_to_string (result
.symbol
));
1975 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1976 check to see if NAME is a field of `this'. */
1978 langdef
= language_def (language
);
1980 /* Don't do this check if we are searching for a struct. It will
1981 not be found by check_field, but will be found by other
1983 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
1985 result
= lookup_language_this (langdef
, block
);
1989 struct type
*t
= result
.symbol
->type
;
1991 /* I'm not really sure that type of this can ever
1992 be typedefed; just be safe. */
1993 t
= check_typedef (t
);
1994 if (TYPE_CODE (t
) == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (t
))
1995 t
= TYPE_TARGET_TYPE (t
);
1997 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1998 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1999 error (_("Internal error: `%s' is not an aggregate"),
2000 langdef
->la_name_of_this
);
2002 if (check_field (t
, name
, is_a_field_of_this
))
2004 if (symbol_lookup_debug
)
2006 fprintf_unfiltered (gdb_stdlog
,
2007 "lookup_symbol_aux (...) = NULL\n");
2009 return (struct block_symbol
) {NULL
, NULL
};
2014 /* Now do whatever is appropriate for LANGUAGE to look
2015 up static and global variables. */
2017 result
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2018 if (result
.symbol
!= NULL
)
2020 if (symbol_lookup_debug
)
2022 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2023 host_address_to_string (result
.symbol
));
2028 /* Now search all static file-level symbols. Not strictly correct,
2029 but more useful than an error. */
2031 result
= lookup_static_symbol (name
, domain
);
2032 if (symbol_lookup_debug
)
2034 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2035 result
.symbol
!= NULL
2036 ? host_address_to_string (result
.symbol
)
2042 /* Check to see if the symbol is defined in BLOCK or its superiors.
2043 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2045 static struct block_symbol
2046 lookup_local_symbol (const char *name
, const struct block
*block
,
2047 const domain_enum domain
,
2048 enum language language
)
2051 const struct block
*static_block
= block_static_block (block
);
2052 const char *scope
= block_scope (block
);
2054 /* Check if either no block is specified or it's a global block. */
2056 if (static_block
== NULL
)
2057 return (struct block_symbol
) {NULL
, NULL
};
2059 while (block
!= static_block
)
2061 sym
= lookup_symbol_in_block (name
, block
, domain
);
2063 return (struct block_symbol
) {sym
, block
};
2065 if (language
== language_cplus
|| language
== language_fortran
)
2067 struct block_symbol sym
2068 = cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2071 if (sym
.symbol
!= NULL
)
2075 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2077 block
= BLOCK_SUPERBLOCK (block
);
2080 /* We've reached the end of the function without finding a result. */
2082 return (struct block_symbol
) {NULL
, NULL
};
2088 lookup_objfile_from_block (const struct block
*block
)
2090 struct objfile
*obj
;
2091 struct compunit_symtab
*cust
;
2096 block
= block_global_block (block
);
2097 /* Look through all blockvectors. */
2098 ALL_COMPUNITS (obj
, cust
)
2099 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2102 if (obj
->separate_debug_objfile_backlink
)
2103 obj
= obj
->separate_debug_objfile_backlink
;
2114 lookup_symbol_in_block (const char *name
, const struct block
*block
,
2115 const domain_enum domain
)
2119 if (symbol_lookup_debug
> 1)
2121 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2123 fprintf_unfiltered (gdb_stdlog
,
2124 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2125 name
, host_address_to_string (block
),
2126 objfile_debug_name (objfile
),
2127 domain_name (domain
));
2130 sym
= block_lookup_symbol (block
, name
, domain
);
2133 if (symbol_lookup_debug
> 1)
2135 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2136 host_address_to_string (sym
));
2138 return fixup_symbol_section (sym
, NULL
);
2141 if (symbol_lookup_debug
> 1)
2142 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2149 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2151 const domain_enum domain
)
2153 struct objfile
*objfile
;
2155 for (objfile
= main_objfile
;
2157 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2159 struct block_symbol result
2160 = lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
, name
, domain
);
2162 if (result
.symbol
!= NULL
)
2166 return (struct block_symbol
) {NULL
, NULL
};
2169 /* Check to see if the symbol is defined in one of the OBJFILE's
2170 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2171 depending on whether or not we want to search global symbols or
2174 static struct block_symbol
2175 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2176 const char *name
, const domain_enum domain
)
2178 struct compunit_symtab
*cust
;
2180 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2182 if (symbol_lookup_debug
> 1)
2184 fprintf_unfiltered (gdb_stdlog
,
2185 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2186 objfile_debug_name (objfile
),
2187 block_index
== GLOBAL_BLOCK
2188 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2189 name
, domain_name (domain
));
2192 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2194 const struct blockvector
*bv
;
2195 const struct block
*block
;
2196 struct block_symbol result
;
2198 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2199 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2200 result
.symbol
= block_lookup_symbol_primary (block
, name
, domain
);
2201 result
.block
= block
;
2202 if (result
.symbol
!= NULL
)
2204 if (symbol_lookup_debug
> 1)
2206 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2207 host_address_to_string (result
.symbol
),
2208 host_address_to_string (block
));
2210 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2216 if (symbol_lookup_debug
> 1)
2217 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2218 return (struct block_symbol
) {NULL
, NULL
};
2221 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2222 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2223 and all associated separate debug objfiles.
2225 Normally we only look in OBJFILE, and not any separate debug objfiles
2226 because the outer loop will cause them to be searched too. This case is
2227 different. Here we're called from search_symbols where it will only
2228 call us for the the objfile that contains a matching minsym. */
2230 static struct block_symbol
2231 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2232 const char *linkage_name
,
2235 enum language lang
= current_language
->la_language
;
2236 struct objfile
*main_objfile
, *cur_objfile
;
2238 demangle_result_storage storage
;
2239 const char *modified_name
= demangle_for_lookup (linkage_name
, lang
, storage
);
2241 if (objfile
->separate_debug_objfile_backlink
)
2242 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2244 main_objfile
= objfile
;
2246 for (cur_objfile
= main_objfile
;
2248 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2250 struct block_symbol result
;
2252 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2253 modified_name
, domain
);
2254 if (result
.symbol
== NULL
)
2255 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2256 modified_name
, domain
);
2257 if (result
.symbol
!= NULL
)
2261 return (struct block_symbol
) {NULL
, NULL
};
2264 /* A helper function that throws an exception when a symbol was found
2265 in a psymtab but not in a symtab. */
2267 static void ATTRIBUTE_NORETURN
2268 error_in_psymtab_expansion (int block_index
, const char *name
,
2269 struct compunit_symtab
*cust
)
2272 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2273 %s may be an inlined function, or may be a template function\n \
2274 (if a template, try specifying an instantiation: %s<type>)."),
2275 block_index
== GLOBAL_BLOCK
? "global" : "static",
2277 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2281 /* A helper function for various lookup routines that interfaces with
2282 the "quick" symbol table functions. */
2284 static struct block_symbol
2285 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2286 const char *name
, const domain_enum domain
)
2288 struct compunit_symtab
*cust
;
2289 const struct blockvector
*bv
;
2290 const struct block
*block
;
2291 struct block_symbol result
;
2294 return (struct block_symbol
) {NULL
, NULL
};
2296 if (symbol_lookup_debug
> 1)
2298 fprintf_unfiltered (gdb_stdlog
,
2299 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2300 objfile_debug_name (objfile
),
2301 block_index
== GLOBAL_BLOCK
2302 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2303 name
, domain_name (domain
));
2306 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2309 if (symbol_lookup_debug
> 1)
2311 fprintf_unfiltered (gdb_stdlog
,
2312 "lookup_symbol_via_quick_fns (...) = NULL\n");
2314 return (struct block_symbol
) {NULL
, NULL
};
2317 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2318 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2319 result
.symbol
= block_lookup_symbol (block
, name
, domain
);
2320 if (result
.symbol
== NULL
)
2321 error_in_psymtab_expansion (block_index
, name
, cust
);
2323 if (symbol_lookup_debug
> 1)
2325 fprintf_unfiltered (gdb_stdlog
,
2326 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2327 host_address_to_string (result
.symbol
),
2328 host_address_to_string (block
));
2331 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2332 result
.block
= block
;
2339 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2341 const struct block
*block
,
2342 const domain_enum domain
)
2344 struct block_symbol result
;
2346 /* NOTE: carlton/2003-05-19: The comments below were written when
2347 this (or what turned into this) was part of lookup_symbol_aux;
2348 I'm much less worried about these questions now, since these
2349 decisions have turned out well, but I leave these comments here
2352 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2353 not it would be appropriate to search the current global block
2354 here as well. (That's what this code used to do before the
2355 is_a_field_of_this check was moved up.) On the one hand, it's
2356 redundant with the lookup in all objfiles search that happens
2357 next. On the other hand, if decode_line_1 is passed an argument
2358 like filename:var, then the user presumably wants 'var' to be
2359 searched for in filename. On the third hand, there shouldn't be
2360 multiple global variables all of which are named 'var', and it's
2361 not like decode_line_1 has ever restricted its search to only
2362 global variables in a single filename. All in all, only
2363 searching the static block here seems best: it's correct and it's
2366 /* NOTE: carlton/2002-12-05: There's also a possible performance
2367 issue here: if you usually search for global symbols in the
2368 current file, then it would be slightly better to search the
2369 current global block before searching all the symtabs. But there
2370 are other factors that have a much greater effect on performance
2371 than that one, so I don't think we should worry about that for
2374 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2375 the current objfile. Searching the current objfile first is useful
2376 for both matching user expectations as well as performance. */
2378 result
= lookup_symbol_in_static_block (name
, block
, domain
);
2379 if (result
.symbol
!= NULL
)
2382 /* If we didn't find a definition for a builtin type in the static block,
2383 search for it now. This is actually the right thing to do and can be
2384 a massive performance win. E.g., when debugging a program with lots of
2385 shared libraries we could search all of them only to find out the
2386 builtin type isn't defined in any of them. This is common for types
2388 if (domain
== VAR_DOMAIN
)
2390 struct gdbarch
*gdbarch
;
2393 gdbarch
= target_gdbarch ();
2395 gdbarch
= block_gdbarch (block
);
2396 result
.symbol
= language_lookup_primitive_type_as_symbol (langdef
,
2398 result
.block
= NULL
;
2399 if (result
.symbol
!= NULL
)
2403 return lookup_global_symbol (name
, block
, domain
);
2409 lookup_symbol_in_static_block (const char *name
,
2410 const struct block
*block
,
2411 const domain_enum domain
)
2413 const struct block
*static_block
= block_static_block (block
);
2416 if (static_block
== NULL
)
2417 return (struct block_symbol
) {NULL
, NULL
};
2419 if (symbol_lookup_debug
)
2421 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2423 fprintf_unfiltered (gdb_stdlog
,
2424 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2427 host_address_to_string (block
),
2428 objfile_debug_name (objfile
),
2429 domain_name (domain
));
2432 sym
= lookup_symbol_in_block (name
, static_block
, domain
);
2433 if (symbol_lookup_debug
)
2435 fprintf_unfiltered (gdb_stdlog
,
2436 "lookup_symbol_in_static_block (...) = %s\n",
2437 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2439 return (struct block_symbol
) {sym
, static_block
};
2442 /* Perform the standard symbol lookup of NAME in OBJFILE:
2443 1) First search expanded symtabs, and if not found
2444 2) Search the "quick" symtabs (partial or .gdb_index).
2445 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2447 static struct block_symbol
2448 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2449 const char *name
, const domain_enum domain
)
2451 struct block_symbol result
;
2453 if (symbol_lookup_debug
)
2455 fprintf_unfiltered (gdb_stdlog
,
2456 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2457 objfile_debug_name (objfile
),
2458 block_index
== GLOBAL_BLOCK
2459 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2460 name
, domain_name (domain
));
2463 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2465 if (result
.symbol
!= NULL
)
2467 if (symbol_lookup_debug
)
2469 fprintf_unfiltered (gdb_stdlog
,
2470 "lookup_symbol_in_objfile (...) = %s"
2472 host_address_to_string (result
.symbol
));
2477 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2479 if (symbol_lookup_debug
)
2481 fprintf_unfiltered (gdb_stdlog
,
2482 "lookup_symbol_in_objfile (...) = %s%s\n",
2483 result
.symbol
!= NULL
2484 ? host_address_to_string (result
.symbol
)
2486 result
.symbol
!= NULL
? " (via quick fns)" : "");
2494 lookup_static_symbol (const char *name
, const domain_enum domain
)
2496 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2497 struct objfile
*objfile
;
2498 struct block_symbol result
;
2499 struct block_symbol_cache
*bsc
;
2500 struct symbol_cache_slot
*slot
;
2502 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2503 NULL for OBJFILE_CONTEXT. */
2504 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2506 if (result
.symbol
!= NULL
)
2508 if (SYMBOL_LOOKUP_FAILED_P (result
))
2509 return (struct block_symbol
) {NULL
, NULL
};
2513 ALL_OBJFILES (objfile
)
2515 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2516 if (result
.symbol
!= NULL
)
2518 /* Still pass NULL for OBJFILE_CONTEXT here. */
2519 symbol_cache_mark_found (bsc
, slot
, NULL
, result
.symbol
,
2525 /* Still pass NULL for OBJFILE_CONTEXT here. */
2526 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2527 return (struct block_symbol
) {NULL
, NULL
};
2530 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2532 struct global_sym_lookup_data
2534 /* The name of the symbol we are searching for. */
2537 /* The domain to use for our search. */
2540 /* The field where the callback should store the symbol if found.
2541 It should be initialized to {NULL, NULL} before the search is started. */
2542 struct block_symbol result
;
2545 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2546 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2547 OBJFILE. The arguments for the search are passed via CB_DATA,
2548 which in reality is a pointer to struct global_sym_lookup_data. */
2551 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2554 struct global_sym_lookup_data
*data
=
2555 (struct global_sym_lookup_data
*) cb_data
;
2557 gdb_assert (data
->result
.symbol
== NULL
2558 && data
->result
.block
== NULL
);
2560 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2561 data
->name
, data
->domain
);
2563 /* If we found a match, tell the iterator to stop. Otherwise,
2565 return (data
->result
.symbol
!= NULL
);
2571 lookup_global_symbol (const char *name
,
2572 const struct block
*block
,
2573 const domain_enum domain
)
2575 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2576 struct block_symbol result
;
2577 struct objfile
*objfile
;
2578 struct global_sym_lookup_data lookup_data
;
2579 struct block_symbol_cache
*bsc
;
2580 struct symbol_cache_slot
*slot
;
2582 objfile
= lookup_objfile_from_block (block
);
2584 /* First see if we can find the symbol in the cache.
2585 This works because we use the current objfile to qualify the lookup. */
2586 result
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2588 if (result
.symbol
!= NULL
)
2590 if (SYMBOL_LOOKUP_FAILED_P (result
))
2591 return (struct block_symbol
) {NULL
, NULL
};
2595 /* Call library-specific lookup procedure. */
2596 if (objfile
!= NULL
)
2597 result
= solib_global_lookup (objfile
, name
, domain
);
2599 /* If that didn't work go a global search (of global blocks, heh). */
2600 if (result
.symbol
== NULL
)
2602 memset (&lookup_data
, 0, sizeof (lookup_data
));
2603 lookup_data
.name
= name
;
2604 lookup_data
.domain
= domain
;
2605 gdbarch_iterate_over_objfiles_in_search_order
2606 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2607 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2608 result
= lookup_data
.result
;
2611 if (result
.symbol
!= NULL
)
2612 symbol_cache_mark_found (bsc
, slot
, objfile
, result
.symbol
, result
.block
);
2614 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2620 symbol_matches_domain (enum language symbol_language
,
2621 domain_enum symbol_domain
,
2624 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2625 Similarly, any Ada type declaration implicitly defines a typedef. */
2626 if (symbol_language
== language_cplus
2627 || symbol_language
== language_d
2628 || symbol_language
== language_ada
2629 || symbol_language
== language_rust
)
2631 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2632 && symbol_domain
== STRUCT_DOMAIN
)
2635 /* For all other languages, strict match is required. */
2636 return (symbol_domain
== domain
);
2642 lookup_transparent_type (const char *name
)
2644 return current_language
->la_lookup_transparent_type (name
);
2647 /* A helper for basic_lookup_transparent_type that interfaces with the
2648 "quick" symbol table functions. */
2650 static struct type
*
2651 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2654 struct compunit_symtab
*cust
;
2655 const struct blockvector
*bv
;
2656 struct block
*block
;
2661 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2666 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2667 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2668 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2669 block_find_non_opaque_type
, NULL
);
2671 error_in_psymtab_expansion (block_index
, name
, cust
);
2672 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2673 return SYMBOL_TYPE (sym
);
2676 /* Subroutine of basic_lookup_transparent_type to simplify it.
2677 Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
2678 BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */
2680 static struct type
*
2681 basic_lookup_transparent_type_1 (struct objfile
*objfile
, int block_index
,
2684 const struct compunit_symtab
*cust
;
2685 const struct blockvector
*bv
;
2686 const struct block
*block
;
2687 const struct symbol
*sym
;
2689 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2691 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2692 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2693 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2694 block_find_non_opaque_type
, NULL
);
2697 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2698 return SYMBOL_TYPE (sym
);
2705 /* The standard implementation of lookup_transparent_type. This code
2706 was modeled on lookup_symbol -- the parts not relevant to looking
2707 up types were just left out. In particular it's assumed here that
2708 types are available in STRUCT_DOMAIN and only in file-static or
2712 basic_lookup_transparent_type (const char *name
)
2714 struct objfile
*objfile
;
2717 /* Now search all the global symbols. Do the symtab's first, then
2718 check the psymtab's. If a psymtab indicates the existence
2719 of the desired name as a global, then do psymtab-to-symtab
2720 conversion on the fly and return the found symbol. */
2722 ALL_OBJFILES (objfile
)
2724 t
= basic_lookup_transparent_type_1 (objfile
, GLOBAL_BLOCK
, name
);
2729 ALL_OBJFILES (objfile
)
2731 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2736 /* Now search the static file-level symbols.
2737 Not strictly correct, but more useful than an error.
2738 Do the symtab's first, then
2739 check the psymtab's. If a psymtab indicates the existence
2740 of the desired name as a file-level static, then do psymtab-to-symtab
2741 conversion on the fly and return the found symbol. */
2743 ALL_OBJFILES (objfile
)
2745 t
= basic_lookup_transparent_type_1 (objfile
, STATIC_BLOCK
, name
);
2750 ALL_OBJFILES (objfile
)
2752 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2757 return (struct type
*) 0;
2760 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2762 For each symbol that matches, CALLBACK is called. The symbol is
2763 passed to the callback.
2765 If CALLBACK returns false, the iteration ends. Otherwise, the
2766 search continues. */
2769 iterate_over_symbols (const struct block
*block
, const char *name
,
2770 const domain_enum domain
,
2771 gdb::function_view
<symbol_found_callback_ftype
> callback
)
2773 struct block_iterator iter
;
2776 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2778 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2779 SYMBOL_DOMAIN (sym
), domain
))
2781 if (!callback (sym
))
2787 /* Find the compunit symtab associated with PC and SECTION.
2788 This will read in debug info as necessary. */
2790 struct compunit_symtab
*
2791 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2793 struct compunit_symtab
*cust
;
2794 struct compunit_symtab
*best_cust
= NULL
;
2795 struct objfile
*objfile
;
2796 CORE_ADDR distance
= 0;
2797 struct bound_minimal_symbol msymbol
;
2799 /* If we know that this is not a text address, return failure. This is
2800 necessary because we loop based on the block's high and low code
2801 addresses, which do not include the data ranges, and because
2802 we call find_pc_sect_psymtab which has a similar restriction based
2803 on the partial_symtab's texthigh and textlow. */
2804 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2806 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2807 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2808 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2809 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2810 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2813 /* Search all symtabs for the one whose file contains our address, and which
2814 is the smallest of all the ones containing the address. This is designed
2815 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2816 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2817 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2819 This happens for native ecoff format, where code from included files
2820 gets its own symtab. The symtab for the included file should have
2821 been read in already via the dependency mechanism.
2822 It might be swifter to create several symtabs with the same name
2823 like xcoff does (I'm not sure).
2825 It also happens for objfiles that have their functions reordered.
2826 For these, the symtab we are looking for is not necessarily read in. */
2828 ALL_COMPUNITS (objfile
, cust
)
2831 const struct blockvector
*bv
;
2833 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2834 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2836 if (BLOCK_START (b
) <= pc
2837 && BLOCK_END (b
) > pc
2839 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2841 /* For an objfile that has its functions reordered,
2842 find_pc_psymtab will find the proper partial symbol table
2843 and we simply return its corresponding symtab. */
2844 /* In order to better support objfiles that contain both
2845 stabs and coff debugging info, we continue on if a psymtab
2847 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2849 struct compunit_symtab
*result
;
2852 = objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2861 struct block_iterator iter
;
2862 struct symbol
*sym
= NULL
;
2864 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2866 fixup_symbol_section (sym
, objfile
);
2867 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2872 continue; /* No symbol in this symtab matches
2875 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2880 if (best_cust
!= NULL
)
2883 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2885 ALL_OBJFILES (objfile
)
2887 struct compunit_symtab
*result
;
2891 result
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2902 /* Find the compunit symtab associated with PC.
2903 This will read in debug info as necessary.
2904 Backward compatibility, no section. */
2906 struct compunit_symtab
*
2907 find_pc_compunit_symtab (CORE_ADDR pc
)
2909 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
2913 /* Find the source file and line number for a given PC value and SECTION.
2914 Return a structure containing a symtab pointer, a line number,
2915 and a pc range for the entire source line.
2916 The value's .pc field is NOT the specified pc.
2917 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2918 use the line that ends there. Otherwise, in that case, the line
2919 that begins there is used. */
2921 /* The big complication here is that a line may start in one file, and end just
2922 before the start of another file. This usually occurs when you #include
2923 code in the middle of a subroutine. To properly find the end of a line's PC
2924 range, we must search all symtabs associated with this compilation unit, and
2925 find the one whose first PC is closer than that of the next line in this
2928 /* If it's worth the effort, we could be using a binary search. */
2930 struct symtab_and_line
2931 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2933 struct compunit_symtab
*cust
;
2934 struct symtab
*iter_s
;
2935 struct linetable
*l
;
2938 struct linetable_entry
*item
;
2939 struct symtab_and_line val
;
2940 const struct blockvector
*bv
;
2941 struct bound_minimal_symbol msymbol
;
2943 /* Info on best line seen so far, and where it starts, and its file. */
2945 struct linetable_entry
*best
= NULL
;
2946 CORE_ADDR best_end
= 0;
2947 struct symtab
*best_symtab
= 0;
2949 /* Store here the first line number
2950 of a file which contains the line at the smallest pc after PC.
2951 If we don't find a line whose range contains PC,
2952 we will use a line one less than this,
2953 with a range from the start of that file to the first line's pc. */
2954 struct linetable_entry
*alt
= NULL
;
2956 /* Info on best line seen in this file. */
2958 struct linetable_entry
*prev
;
2960 /* If this pc is not from the current frame,
2961 it is the address of the end of a call instruction.
2962 Quite likely that is the start of the following statement.
2963 But what we want is the statement containing the instruction.
2964 Fudge the pc to make sure we get that. */
2966 init_sal (&val
); /* initialize to zeroes */
2968 val
.pspace
= current_program_space
;
2970 /* It's tempting to assume that, if we can't find debugging info for
2971 any function enclosing PC, that we shouldn't search for line
2972 number info, either. However, GAS can emit line number info for
2973 assembly files --- very helpful when debugging hand-written
2974 assembly code. In such a case, we'd have no debug info for the
2975 function, but we would have line info. */
2980 /* elz: added this because this function returned the wrong
2981 information if the pc belongs to a stub (import/export)
2982 to call a shlib function. This stub would be anywhere between
2983 two functions in the target, and the line info was erroneously
2984 taken to be the one of the line before the pc. */
2986 /* RT: Further explanation:
2988 * We have stubs (trampolines) inserted between procedures.
2990 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2991 * exists in the main image.
2993 * In the minimal symbol table, we have a bunch of symbols
2994 * sorted by start address. The stubs are marked as "trampoline",
2995 * the others appear as text. E.g.:
2997 * Minimal symbol table for main image
2998 * main: code for main (text symbol)
2999 * shr1: stub (trampoline symbol)
3000 * foo: code for foo (text symbol)
3002 * Minimal symbol table for "shr1" image:
3004 * shr1: code for shr1 (text symbol)
3007 * So the code below is trying to detect if we are in the stub
3008 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3009 * and if found, do the symbolization from the real-code address
3010 * rather than the stub address.
3012 * Assumptions being made about the minimal symbol table:
3013 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3014 * if we're really in the trampoline.s If we're beyond it (say
3015 * we're in "foo" in the above example), it'll have a closer
3016 * symbol (the "foo" text symbol for example) and will not
3017 * return the trampoline.
3018 * 2. lookup_minimal_symbol_text() will find a real text symbol
3019 * corresponding to the trampoline, and whose address will
3020 * be different than the trampoline address. I put in a sanity
3021 * check for the address being the same, to avoid an
3022 * infinite recursion.
3024 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3025 if (msymbol
.minsym
!= NULL
)
3026 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3028 struct bound_minimal_symbol mfunsym
3029 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3032 if (mfunsym
.minsym
== NULL
)
3033 /* I eliminated this warning since it is coming out
3034 * in the following situation:
3035 * gdb shmain // test program with shared libraries
3036 * (gdb) break shr1 // function in shared lib
3037 * Warning: In stub for ...
3038 * In the above situation, the shared lib is not loaded yet,
3039 * so of course we can't find the real func/line info,
3040 * but the "break" still works, and the warning is annoying.
3041 * So I commented out the warning. RT */
3042 /* warning ("In stub for %s; unable to find real function/line info",
3043 SYMBOL_LINKAGE_NAME (msymbol)); */
3046 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3047 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3048 /* Avoid infinite recursion */
3049 /* See above comment about why warning is commented out. */
3050 /* warning ("In stub for %s; unable to find real function/line info",
3051 SYMBOL_LINKAGE_NAME (msymbol)); */
3055 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3059 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3062 /* If no symbol information, return previous pc. */
3069 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3071 /* Look at all the symtabs that share this blockvector.
3072 They all have the same apriori range, that we found was right;
3073 but they have different line tables. */
3075 ALL_COMPUNIT_FILETABS (cust
, iter_s
)
3077 /* Find the best line in this symtab. */
3078 l
= SYMTAB_LINETABLE (iter_s
);
3084 /* I think len can be zero if the symtab lacks line numbers
3085 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3086 I'm not sure which, and maybe it depends on the symbol
3092 item
= l
->item
; /* Get first line info. */
3094 /* Is this file's first line closer than the first lines of other files?
3095 If so, record this file, and its first line, as best alternate. */
3096 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3099 for (i
= 0; i
< len
; i
++, item
++)
3101 /* Leave prev pointing to the linetable entry for the last line
3102 that started at or before PC. */
3109 /* At this point, prev points at the line whose start addr is <= pc, and
3110 item points at the next line. If we ran off the end of the linetable
3111 (pc >= start of the last line), then prev == item. If pc < start of
3112 the first line, prev will not be set. */
3114 /* Is this file's best line closer than the best in the other files?
3115 If so, record this file, and its best line, as best so far. Don't
3116 save prev if it represents the end of a function (i.e. line number
3117 0) instead of a real line. */
3119 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3122 best_symtab
= iter_s
;
3124 /* Discard BEST_END if it's before the PC of the current BEST. */
3125 if (best_end
<= best
->pc
)
3129 /* If another line (denoted by ITEM) is in the linetable and its
3130 PC is after BEST's PC, but before the current BEST_END, then
3131 use ITEM's PC as the new best_end. */
3132 if (best
&& i
< len
&& item
->pc
> best
->pc
3133 && (best_end
== 0 || best_end
> item
->pc
))
3134 best_end
= item
->pc
;
3139 /* If we didn't find any line number info, just return zeros.
3140 We used to return alt->line - 1 here, but that could be
3141 anywhere; if we don't have line number info for this PC,
3142 don't make some up. */
3145 else if (best
->line
== 0)
3147 /* If our best fit is in a range of PC's for which no line
3148 number info is available (line number is zero) then we didn't
3149 find any valid line information. */
3154 val
.symtab
= best_symtab
;
3155 val
.line
= best
->line
;
3157 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3162 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3164 val
.section
= section
;
3168 /* Backward compatibility (no section). */
3170 struct symtab_and_line
3171 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3173 struct obj_section
*section
;
3175 section
= find_pc_overlay (pc
);
3176 if (pc_in_unmapped_range (pc
, section
))
3177 pc
= overlay_mapped_address (pc
, section
);
3178 return find_pc_sect_line (pc
, section
, notcurrent
);
3184 find_pc_line_symtab (CORE_ADDR pc
)
3186 struct symtab_and_line sal
;
3188 /* This always passes zero for NOTCURRENT to find_pc_line.
3189 There are currently no callers that ever pass non-zero. */
3190 sal
= find_pc_line (pc
, 0);
3194 /* Find line number LINE in any symtab whose name is the same as
3197 If found, return the symtab that contains the linetable in which it was
3198 found, set *INDEX to the index in the linetable of the best entry
3199 found, and set *EXACT_MATCH nonzero if the value returned is an
3202 If not found, return NULL. */
3205 find_line_symtab (struct symtab
*symtab
, int line
,
3206 int *index
, int *exact_match
)
3208 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3210 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3214 struct linetable
*best_linetable
;
3215 struct symtab
*best_symtab
;
3217 /* First try looking it up in the given symtab. */
3218 best_linetable
= SYMTAB_LINETABLE (symtab
);
3219 best_symtab
= symtab
;
3220 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3221 if (best_index
< 0 || !exact
)
3223 /* Didn't find an exact match. So we better keep looking for
3224 another symtab with the same name. In the case of xcoff,
3225 multiple csects for one source file (produced by IBM's FORTRAN
3226 compiler) produce multiple symtabs (this is unavoidable
3227 assuming csects can be at arbitrary places in memory and that
3228 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3230 /* BEST is the smallest linenumber > LINE so far seen,
3231 or 0 if none has been seen so far.
3232 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3235 struct objfile
*objfile
;
3236 struct compunit_symtab
*cu
;
3239 if (best_index
>= 0)
3240 best
= best_linetable
->item
[best_index
].line
;
3244 ALL_OBJFILES (objfile
)
3247 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
3248 symtab_to_fullname (symtab
));
3251 ALL_FILETABS (objfile
, cu
, s
)
3253 struct linetable
*l
;
3256 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
3258 if (FILENAME_CMP (symtab_to_fullname (symtab
),
3259 symtab_to_fullname (s
)) != 0)
3261 l
= SYMTAB_LINETABLE (s
);
3262 ind
= find_line_common (l
, line
, &exact
, 0);
3272 if (best
== 0 || l
->item
[ind
].line
< best
)
3274 best
= l
->item
[ind
].line
;
3287 *index
= best_index
;
3289 *exact_match
= exact
;
3294 /* Given SYMTAB, returns all the PCs function in the symtab that
3295 exactly match LINE. Returns an empty vector if there are no exact
3296 matches, but updates BEST_ITEM in this case. */
3298 std::vector
<CORE_ADDR
>
3299 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3300 struct linetable_entry
**best_item
)
3303 std::vector
<CORE_ADDR
> result
;
3305 /* First, collect all the PCs that are at this line. */
3311 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3318 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3320 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3326 result
.push_back (SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3334 /* Set the PC value for a given source file and line number and return true.
3335 Returns zero for invalid line number (and sets the PC to 0).
3336 The source file is specified with a struct symtab. */
3339 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3341 struct linetable
*l
;
3348 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3351 l
= SYMTAB_LINETABLE (symtab
);
3352 *pc
= l
->item
[ind
].pc
;
3359 /* Find the range of pc values in a line.
3360 Store the starting pc of the line into *STARTPTR
3361 and the ending pc (start of next line) into *ENDPTR.
3362 Returns 1 to indicate success.
3363 Returns 0 if could not find the specified line. */
3366 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3369 CORE_ADDR startaddr
;
3370 struct symtab_and_line found_sal
;
3373 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3376 /* This whole function is based on address. For example, if line 10 has
3377 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3378 "info line *0x123" should say the line goes from 0x100 to 0x200
3379 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3380 This also insures that we never give a range like "starts at 0x134
3381 and ends at 0x12c". */
3383 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3384 if (found_sal
.line
!= sal
.line
)
3386 /* The specified line (sal) has zero bytes. */
3387 *startptr
= found_sal
.pc
;
3388 *endptr
= found_sal
.pc
;
3392 *startptr
= found_sal
.pc
;
3393 *endptr
= found_sal
.end
;
3398 /* Given a line table and a line number, return the index into the line
3399 table for the pc of the nearest line whose number is >= the specified one.
3400 Return -1 if none is found. The value is >= 0 if it is an index.
3401 START is the index at which to start searching the line table.
3403 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3406 find_line_common (struct linetable
*l
, int lineno
,
3407 int *exact_match
, int start
)
3412 /* BEST is the smallest linenumber > LINENO so far seen,
3413 or 0 if none has been seen so far.
3414 BEST_INDEX identifies the item for it. */
3416 int best_index
= -1;
3427 for (i
= start
; i
< len
; i
++)
3429 struct linetable_entry
*item
= &(l
->item
[i
]);
3431 if (item
->line
== lineno
)
3433 /* Return the first (lowest address) entry which matches. */
3438 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3445 /* If we got here, we didn't get an exact match. */
3450 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3452 struct symtab_and_line sal
;
3454 sal
= find_pc_line (pc
, 0);
3457 return sal
.symtab
!= 0;
3460 /* Given a function symbol SYM, find the symtab and line for the start
3462 If the argument FUNFIRSTLINE is nonzero, we want the first line
3463 of real code inside the function.
3464 This function should return SALs matching those from minsym_found,
3465 otherwise false multiple-locations breakpoints could be placed. */
3467 struct symtab_and_line
3468 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
3470 struct symtab_and_line sal
;
3471 struct obj_section
*section
;
3473 fixup_symbol_section (sym
, NULL
);
3474 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
);
3475 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)), section
, 0);
3477 if (funfirstline
&& sal
.symtab
!= NULL
3478 && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal
.symtab
))
3479 || SYMTAB_LANGUAGE (sal
.symtab
) == language_asm
))
3481 struct gdbarch
*gdbarch
= symbol_arch (sym
);
3483 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3484 if (gdbarch_skip_entrypoint_p (gdbarch
))
3485 sal
.pc
= gdbarch_skip_entrypoint (gdbarch
, sal
.pc
);
3489 /* We always should have a line for the function start address.
3490 If we don't, something is odd. Create a plain SAL refering
3491 just the PC and hope that skip_prologue_sal (if requested)
3492 can find a line number for after the prologue. */
3493 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
3496 sal
.pspace
= current_program_space
;
3497 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3498 sal
.section
= section
;
3502 skip_prologue_sal (&sal
);
3507 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3508 address for that function that has an entry in SYMTAB's line info
3509 table. If such an entry cannot be found, return FUNC_ADDR
3513 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3515 CORE_ADDR func_start
, func_end
;
3516 struct linetable
*l
;
3519 /* Give up if this symbol has no lineinfo table. */
3520 l
= SYMTAB_LINETABLE (symtab
);
3524 /* Get the range for the function's PC values, or give up if we
3525 cannot, for some reason. */
3526 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3529 /* Linetable entries are ordered by PC values, see the commentary in
3530 symtab.h where `struct linetable' is defined. Thus, the first
3531 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3532 address we are looking for. */
3533 for (i
= 0; i
< l
->nitems
; i
++)
3535 struct linetable_entry
*item
= &(l
->item
[i
]);
3537 /* Don't use line numbers of zero, they mark special entries in
3538 the table. See the commentary on symtab.h before the
3539 definition of struct linetable. */
3540 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3547 /* Adjust SAL to the first instruction past the function prologue.
3548 If the PC was explicitly specified, the SAL is not changed.
3549 If the line number was explicitly specified, at most the SAL's PC
3550 is updated. If SAL is already past the prologue, then do nothing. */
3553 skip_prologue_sal (struct symtab_and_line
*sal
)
3556 struct symtab_and_line start_sal
;
3557 CORE_ADDR pc
, saved_pc
;
3558 struct obj_section
*section
;
3560 struct objfile
*objfile
;
3561 struct gdbarch
*gdbarch
;
3562 const struct block
*b
, *function_block
;
3563 int force_skip
, skip
;
3565 /* Do not change the SAL if PC was specified explicitly. */
3566 if (sal
->explicit_pc
)
3569 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
3571 switch_to_program_space_and_thread (sal
->pspace
);
3573 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3576 fixup_symbol_section (sym
, NULL
);
3578 objfile
= symbol_objfile (sym
);
3579 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3580 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3581 name
= SYMBOL_LINKAGE_NAME (sym
);
3585 struct bound_minimal_symbol msymbol
3586 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3588 if (msymbol
.minsym
== NULL
)
3591 objfile
= msymbol
.objfile
;
3592 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3593 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3594 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3597 gdbarch
= get_objfile_arch (objfile
);
3599 /* Process the prologue in two passes. In the first pass try to skip the
3600 prologue (SKIP is true) and verify there is a real need for it (indicated
3601 by FORCE_SKIP). If no such reason was found run a second pass where the
3602 prologue is not skipped (SKIP is false). */
3607 /* Be conservative - allow direct PC (without skipping prologue) only if we
3608 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3609 have to be set by the caller so we use SYM instead. */
3611 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3619 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3620 so that gdbarch_skip_prologue has something unique to work on. */
3621 if (section_is_overlay (section
) && !section_is_mapped (section
))
3622 pc
= overlay_unmapped_address (pc
, section
);
3624 /* Skip "first line" of function (which is actually its prologue). */
3625 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3626 if (gdbarch_skip_entrypoint_p (gdbarch
))
3627 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3629 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
3631 /* For overlays, map pc back into its mapped VMA range. */
3632 pc
= overlay_mapped_address (pc
, section
);
3634 /* Calculate line number. */
3635 start_sal
= find_pc_sect_line (pc
, section
, 0);
3637 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3638 line is still part of the same function. */
3639 if (skip
&& start_sal
.pc
!= pc
3640 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3641 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3642 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3643 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3645 /* First pc of next line */
3647 /* Recalculate the line number (might not be N+1). */
3648 start_sal
= find_pc_sect_line (pc
, section
, 0);
3651 /* On targets with executable formats that don't have a concept of
3652 constructors (ELF with .init has, PE doesn't), gcc emits a call
3653 to `__main' in `main' between the prologue and before user
3655 if (gdbarch_skip_main_prologue_p (gdbarch
)
3656 && name
&& strcmp_iw (name
, "main") == 0)
3658 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3659 /* Recalculate the line number (might not be N+1). */
3660 start_sal
= find_pc_sect_line (pc
, section
, 0);
3664 while (!force_skip
&& skip
--);
3666 /* If we still don't have a valid source line, try to find the first
3667 PC in the lineinfo table that belongs to the same function. This
3668 happens with COFF debug info, which does not seem to have an
3669 entry in lineinfo table for the code after the prologue which has
3670 no direct relation to source. For example, this was found to be
3671 the case with the DJGPP target using "gcc -gcoff" when the
3672 compiler inserted code after the prologue to make sure the stack
3674 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3676 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3677 /* Recalculate the line number. */
3678 start_sal
= find_pc_sect_line (pc
, section
, 0);
3681 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3682 forward SAL to the end of the prologue. */
3687 sal
->section
= section
;
3689 /* Unless the explicit_line flag was set, update the SAL line
3690 and symtab to correspond to the modified PC location. */
3691 if (sal
->explicit_line
)
3694 sal
->symtab
= start_sal
.symtab
;
3695 sal
->line
= start_sal
.line
;
3696 sal
->end
= start_sal
.end
;
3698 /* Check if we are now inside an inlined function. If we can,
3699 use the call site of the function instead. */
3700 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3701 function_block
= NULL
;
3704 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3706 else if (BLOCK_FUNCTION (b
) != NULL
)
3708 b
= BLOCK_SUPERBLOCK (b
);
3710 if (function_block
!= NULL
3711 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3713 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3714 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3718 /* Given PC at the function's start address, attempt to find the
3719 prologue end using SAL information. Return zero if the skip fails.
3721 A non-optimized prologue traditionally has one SAL for the function
3722 and a second for the function body. A single line function has
3723 them both pointing at the same line.
3725 An optimized prologue is similar but the prologue may contain
3726 instructions (SALs) from the instruction body. Need to skip those
3727 while not getting into the function body.
3729 The functions end point and an increasing SAL line are used as
3730 indicators of the prologue's endpoint.
3732 This code is based on the function refine_prologue_limit
3736 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3738 struct symtab_and_line prologue_sal
;
3741 const struct block
*bl
;
3743 /* Get an initial range for the function. */
3744 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3745 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3747 prologue_sal
= find_pc_line (start_pc
, 0);
3748 if (prologue_sal
.line
!= 0)
3750 /* For languages other than assembly, treat two consecutive line
3751 entries at the same address as a zero-instruction prologue.
3752 The GNU assembler emits separate line notes for each instruction
3753 in a multi-instruction macro, but compilers generally will not
3755 if (prologue_sal
.symtab
->language
!= language_asm
)
3757 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3760 /* Skip any earlier lines, and any end-of-sequence marker
3761 from a previous function. */
3762 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3763 || linetable
->item
[idx
].line
== 0)
3766 if (idx
+1 < linetable
->nitems
3767 && linetable
->item
[idx
+1].line
!= 0
3768 && linetable
->item
[idx
+1].pc
== start_pc
)
3772 /* If there is only one sal that covers the entire function,
3773 then it is probably a single line function, like
3775 if (prologue_sal
.end
>= end_pc
)
3778 while (prologue_sal
.end
< end_pc
)
3780 struct symtab_and_line sal
;
3782 sal
= find_pc_line (prologue_sal
.end
, 0);
3785 /* Assume that a consecutive SAL for the same (or larger)
3786 line mark the prologue -> body transition. */
3787 if (sal
.line
>= prologue_sal
.line
)
3789 /* Likewise if we are in a different symtab altogether
3790 (e.g. within a file included via #include). */
3791 if (sal
.symtab
!= prologue_sal
.symtab
)
3794 /* The line number is smaller. Check that it's from the
3795 same function, not something inlined. If it's inlined,
3796 then there is no point comparing the line numbers. */
3797 bl
= block_for_pc (prologue_sal
.end
);
3800 if (block_inlined_p (bl
))
3802 if (BLOCK_FUNCTION (bl
))
3807 bl
= BLOCK_SUPERBLOCK (bl
);
3812 /* The case in which compiler's optimizer/scheduler has
3813 moved instructions into the prologue. We look ahead in
3814 the function looking for address ranges whose
3815 corresponding line number is less the first one that we
3816 found for the function. This is more conservative then
3817 refine_prologue_limit which scans a large number of SALs
3818 looking for any in the prologue. */
3823 if (prologue_sal
.end
< end_pc
)
3824 /* Return the end of this line, or zero if we could not find a
3826 return prologue_sal
.end
;
3828 /* Don't return END_PC, which is past the end of the function. */
3829 return prologue_sal
.pc
;
3832 /* If P is of the form "operator[ \t]+..." where `...' is
3833 some legitimate operator text, return a pointer to the
3834 beginning of the substring of the operator text.
3835 Otherwise, return "". */
3838 operator_chars (const char *p
, const char **end
)
3841 if (!startswith (p
, "operator"))
3845 /* Don't get faked out by `operator' being part of a longer
3847 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3850 /* Allow some whitespace between `operator' and the operator symbol. */
3851 while (*p
== ' ' || *p
== '\t')
3854 /* Recognize 'operator TYPENAME'. */
3856 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3858 const char *q
= p
+ 1;
3860 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3869 case '\\': /* regexp quoting */
3872 if (p
[2] == '=') /* 'operator\*=' */
3874 else /* 'operator\*' */
3878 else if (p
[1] == '[')
3881 error (_("mismatched quoting on brackets, "
3882 "try 'operator\\[\\]'"));
3883 else if (p
[2] == '\\' && p
[3] == ']')
3885 *end
= p
+ 4; /* 'operator\[\]' */
3889 error (_("nothing is allowed between '[' and ']'"));
3893 /* Gratuitous qoute: skip it and move on. */
3915 if (p
[0] == '-' && p
[1] == '>')
3917 /* Struct pointer member operator 'operator->'. */
3920 *end
= p
+ 3; /* 'operator->*' */
3923 else if (p
[2] == '\\')
3925 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3930 *end
= p
+ 2; /* 'operator->' */
3934 if (p
[1] == '=' || p
[1] == p
[0])
3945 error (_("`operator ()' must be specified "
3946 "without whitespace in `()'"));
3951 error (_("`operator ?:' must be specified "
3952 "without whitespace in `?:'"));
3957 error (_("`operator []' must be specified "
3958 "without whitespace in `[]'"));
3962 error (_("`operator %s' not supported"), p
);
3971 /* Cache to watch for file names already seen by filename_seen. */
3973 struct filename_seen_cache
3975 /* Table of files seen so far. */
3977 /* Initial size of the table. It automagically grows from here. */
3978 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3981 /* filename_seen_cache constructor. */
3983 static struct filename_seen_cache
*
3984 create_filename_seen_cache (void)
3986 struct filename_seen_cache
*cache
= XNEW (struct filename_seen_cache
);
3988 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3989 filename_hash
, filename_eq
,
3990 NULL
, xcalloc
, xfree
);
3995 /* Empty the cache, but do not delete it. */
3998 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
4000 htab_empty (cache
->tab
);
4003 /* filename_seen_cache destructor.
4004 This takes a void * argument as it is generally used as a cleanup. */
4007 delete_filename_seen_cache (void *ptr
)
4009 struct filename_seen_cache
*cache
= (struct filename_seen_cache
*) ptr
;
4011 htab_delete (cache
->tab
);
4015 /* If FILE is not already in the table of files in CACHE, return zero;
4016 otherwise return non-zero. Optionally add FILE to the table if ADD
4019 NOTE: We don't manage space for FILE, we assume FILE lives as long
4020 as the caller needs. */
4023 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
4027 /* Is FILE in tab? */
4028 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
4032 /* No; maybe add it to tab. */
4034 *slot
= (char *) file
;
4039 /* Data structure to maintain printing state for output_source_filename. */
4041 struct output_source_filename_data
4043 /* Cache of what we've seen so far. */
4044 struct filename_seen_cache
*filename_seen_cache
;
4046 /* Flag of whether we're printing the first one. */
4050 /* Slave routine for sources_info. Force line breaks at ,'s.
4051 NAME is the name to print.
4052 DATA contains the state for printing and watching for duplicates. */
4055 output_source_filename (const char *name
,
4056 struct output_source_filename_data
*data
)
4058 /* Since a single source file can result in several partial symbol
4059 tables, we need to avoid printing it more than once. Note: if
4060 some of the psymtabs are read in and some are not, it gets
4061 printed both under "Source files for which symbols have been
4062 read" and "Source files for which symbols will be read in on
4063 demand". I consider this a reasonable way to deal with the
4064 situation. I'm not sure whether this can also happen for
4065 symtabs; it doesn't hurt to check. */
4067 /* Was NAME already seen? */
4068 if (filename_seen (data
->filename_seen_cache
, name
, 1))
4070 /* Yes; don't print it again. */
4074 /* No; print it and reset *FIRST. */
4076 printf_filtered (", ");
4080 fputs_filtered (name
, gdb_stdout
);
4083 /* A callback for map_partial_symbol_filenames. */
4086 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4089 output_source_filename (fullname
? fullname
: filename
,
4090 (struct output_source_filename_data
*) data
);
4094 sources_info (char *ignore
, int from_tty
)
4096 struct compunit_symtab
*cu
;
4098 struct objfile
*objfile
;
4099 struct output_source_filename_data data
;
4100 struct cleanup
*cleanups
;
4102 if (!have_full_symbols () && !have_partial_symbols ())
4104 error (_("No symbol table is loaded. Use the \"file\" command."));
4107 data
.filename_seen_cache
= create_filename_seen_cache ();
4108 cleanups
= make_cleanup (delete_filename_seen_cache
,
4109 data
.filename_seen_cache
);
4111 printf_filtered ("Source files for which symbols have been read in:\n\n");
4114 ALL_FILETABS (objfile
, cu
, s
)
4116 const char *fullname
= symtab_to_fullname (s
);
4118 output_source_filename (fullname
, &data
);
4120 printf_filtered ("\n\n");
4122 printf_filtered ("Source files for which symbols "
4123 "will be read in on demand:\n\n");
4125 clear_filename_seen_cache (data
.filename_seen_cache
);
4127 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4128 1 /*need_fullname*/);
4129 printf_filtered ("\n");
4131 do_cleanups (cleanups
);
4134 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4135 non-zero compare only lbasename of FILES. */
4138 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4142 if (file
!= NULL
&& nfiles
!= 0)
4144 for (i
= 0; i
< nfiles
; i
++)
4146 if (compare_filenames_for_search (file
, (basenames
4147 ? lbasename (files
[i
])
4152 else if (nfiles
== 0)
4157 /* Free any memory associated with a search. */
4160 free_search_symbols (struct symbol_search
*symbols
)
4162 struct symbol_search
*p
;
4163 struct symbol_search
*next
;
4165 for (p
= symbols
; p
!= NULL
; p
= next
)
4173 do_free_search_symbols_cleanup (void *symbolsp
)
4175 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
4177 free_search_symbols (symbols
);
4181 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
4183 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
4186 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4187 sort symbols, not minimal symbols. */
4190 compare_search_syms (const void *sa
, const void *sb
)
4192 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
4193 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
4196 c
= FILENAME_CMP (symbol_symtab (sym_a
->symbol
)->filename
,
4197 symbol_symtab (sym_b
->symbol
)->filename
);
4201 if (sym_a
->block
!= sym_b
->block
)
4202 return sym_a
->block
- sym_b
->block
;
4204 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
4205 SYMBOL_PRINT_NAME (sym_b
->symbol
));
4208 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
4209 The duplicates are freed, and the new list is returned in
4210 *NEW_HEAD, *NEW_TAIL. */
4213 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
4214 struct symbol_search
**new_head
,
4215 struct symbol_search
**new_tail
)
4217 struct symbol_search
**symbols
, *symp
;
4220 gdb_assert (found
!= NULL
&& nfound
> 0);
4222 /* Build an array out of the list so we can easily sort them. */
4223 symbols
= XNEWVEC (struct symbol_search
*, nfound
);
4226 for (i
= 0; i
< nfound
; i
++)
4228 gdb_assert (symp
!= NULL
);
4229 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
4233 gdb_assert (symp
== NULL
);
4235 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
4236 compare_search_syms
);
4238 /* Collapse out the dups. */
4239 for (i
= 1, j
= 1; i
< nfound
; ++i
)
4241 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
4242 symbols
[j
++] = symbols
[i
];
4247 symbols
[j
- 1]->next
= NULL
;
4249 /* Rebuild the linked list. */
4250 for (i
= 0; i
< nunique
- 1; i
++)
4251 symbols
[i
]->next
= symbols
[i
+ 1];
4252 symbols
[nunique
- 1]->next
= NULL
;
4254 *new_head
= symbols
[0];
4255 *new_tail
= symbols
[nunique
- 1];
4259 /* Search the symbol table for matches to the regular expression REGEXP,
4260 returning the results in *MATCHES.
4262 Only symbols of KIND are searched:
4263 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4264 and constants (enums)
4265 FUNCTIONS_DOMAIN - search all functions
4266 TYPES_DOMAIN - search all type names
4267 ALL_DOMAIN - an internal error for this function
4269 free_search_symbols should be called when *MATCHES is no longer needed.
4271 Within each file the results are sorted locally; each symtab's global and
4272 static blocks are separately alphabetized.
4273 Duplicate entries are removed. */
4276 search_symbols (const char *regexp
, enum search_domain kind
,
4277 int nfiles
, const char *files
[],
4278 struct symbol_search
**matches
)
4280 struct compunit_symtab
*cust
;
4281 const struct blockvector
*bv
;
4284 struct block_iterator iter
;
4286 struct objfile
*objfile
;
4287 struct minimal_symbol
*msymbol
;
4289 static const enum minimal_symbol_type types
[]
4290 = {mst_data
, mst_text
, mst_abs
};
4291 static const enum minimal_symbol_type types2
[]
4292 = {mst_bss
, mst_file_text
, mst_abs
};
4293 static const enum minimal_symbol_type types3
[]
4294 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4295 static const enum minimal_symbol_type types4
[]
4296 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4297 enum minimal_symbol_type ourtype
;
4298 enum minimal_symbol_type ourtype2
;
4299 enum minimal_symbol_type ourtype3
;
4300 enum minimal_symbol_type ourtype4
;
4301 struct symbol_search
*found
;
4302 struct symbol_search
*tail
;
4304 gdb::optional
<compiled_regex
> preg
;
4306 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
4307 CLEANUP_CHAIN is freed only in the case of an error. */
4308 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
4309 struct cleanup
*retval_chain
;
4311 gdb_assert (kind
<= TYPES_DOMAIN
);
4313 ourtype
= types
[kind
];
4314 ourtype2
= types2
[kind
];
4315 ourtype3
= types3
[kind
];
4316 ourtype4
= types4
[kind
];
4322 /* Make sure spacing is right for C++ operators.
4323 This is just a courtesy to make the matching less sensitive
4324 to how many spaces the user leaves between 'operator'
4325 and <TYPENAME> or <OPERATOR>. */
4327 const char *opname
= operator_chars (regexp
, &opend
);
4332 int fix
= -1; /* -1 means ok; otherwise number of
4335 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4337 /* There should 1 space between 'operator' and 'TYPENAME'. */
4338 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4343 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4344 if (opname
[-1] == ' ')
4347 /* If wrong number of spaces, fix it. */
4350 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4352 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4357 int cflags
= REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4359 preg
.emplace (regexp
, cflags
, _("Invalid regexp"));
4362 /* Search through the partial symtabs *first* for all symbols
4363 matching the regexp. That way we don't have to reproduce all of
4364 the machinery below. */
4365 expand_symtabs_matching ([&] (const char *filename
, bool basenames
)
4367 return file_matches (filename
, files
, nfiles
,
4370 [&] (const char *symname
)
4372 return (!preg
|| preg
->exec (symname
,
4378 /* Here, we search through the minimal symbol tables for functions
4379 and variables that match, and force their symbols to be read.
4380 This is in particular necessary for demangled variable names,
4381 which are no longer put into the partial symbol tables.
4382 The symbol will then be found during the scan of symtabs below.
4384 For functions, find_pc_symtab should succeed if we have debug info
4385 for the function, for variables we have to call
4386 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4388 If the lookup fails, set found_misc so that we will rescan to print
4389 any matching symbols without debug info.
4390 We only search the objfile the msymbol came from, we no longer search
4391 all objfiles. In large programs (1000s of shared libs) searching all
4392 objfiles is not worth the pain. */
4394 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4396 ALL_MSYMBOLS (objfile
, msymbol
)
4400 if (msymbol
->created_by_gdb
)
4403 if (MSYMBOL_TYPE (msymbol
) == ourtype
4404 || MSYMBOL_TYPE (msymbol
) == ourtype2
4405 || MSYMBOL_TYPE (msymbol
) == ourtype3
4406 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4409 || preg
->exec (MSYMBOL_NATURAL_NAME (msymbol
), 0,
4412 /* Note: An important side-effect of these lookup functions
4413 is to expand the symbol table if msymbol is found, for the
4414 benefit of the next loop on ALL_COMPUNITS. */
4415 if (kind
== FUNCTIONS_DOMAIN
4416 ? (find_pc_compunit_symtab
4417 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
)
4418 : (lookup_symbol_in_objfile_from_linkage_name
4419 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4430 retval_chain
= make_cleanup_free_search_symbols (&found
);
4432 ALL_COMPUNITS (objfile
, cust
)
4434 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4435 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4437 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4438 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4440 struct symtab
*real_symtab
= symbol_symtab (sym
);
4444 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
4445 a substring of symtab_to_fullname as it may contain "./" etc. */
4446 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4447 || ((basenames_may_differ
4448 || file_matches (lbasename (real_symtab
->filename
),
4450 && file_matches (symtab_to_fullname (real_symtab
),
4453 || preg
->exec (SYMBOL_NATURAL_NAME (sym
), 0,
4455 && ((kind
== VARIABLES_DOMAIN
4456 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4457 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4458 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4459 /* LOC_CONST can be used for more than just enums,
4460 e.g., c++ static const members.
4461 We only want to skip enums here. */
4462 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4463 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4464 == TYPE_CODE_ENUM
)))
4465 || (kind
== FUNCTIONS_DOMAIN
4466 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4467 || (kind
== TYPES_DOMAIN
4468 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4471 struct symbol_search
*psr
= XCNEW (struct symbol_search
);
4489 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
4490 /* Note: nfound is no longer useful beyond this point. */
4493 /* If there are no eyes, avoid all contact. I mean, if there are
4494 no debug symbols, then add matching minsyms. */
4496 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4498 ALL_MSYMBOLS (objfile
, msymbol
)
4502 if (msymbol
->created_by_gdb
)
4505 if (MSYMBOL_TYPE (msymbol
) == ourtype
4506 || MSYMBOL_TYPE (msymbol
) == ourtype2
4507 || MSYMBOL_TYPE (msymbol
) == ourtype3
4508 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4510 if (!preg
|| preg
->exec (MSYMBOL_NATURAL_NAME (msymbol
), 0,
4513 /* For functions we can do a quick check of whether the
4514 symbol might be found via find_pc_symtab. */
4515 if (kind
!= FUNCTIONS_DOMAIN
4516 || (find_pc_compunit_symtab
4517 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
))
4519 if (lookup_symbol_in_objfile_from_linkage_name
4520 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4524 struct symbol_search
*psr
= XNEW (struct symbol_search
);
4526 psr
->msymbol
.minsym
= msymbol
;
4527 psr
->msymbol
.objfile
= objfile
;
4542 discard_cleanups (retval_chain
);
4543 do_cleanups (old_chain
);
4547 /* Helper function for symtab_symbol_info, this function uses
4548 the data returned from search_symbols() to print information
4549 regarding the match to gdb_stdout. */
4552 print_symbol_info (enum search_domain kind
,
4554 int block
, const char *last
)
4556 struct symtab
*s
= symbol_symtab (sym
);
4557 const char *s_filename
= symtab_to_filename_for_display (s
);
4559 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
4561 fputs_filtered ("\nFile ", gdb_stdout
);
4562 fputs_filtered (s_filename
, gdb_stdout
);
4563 fputs_filtered (":\n", gdb_stdout
);
4566 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4567 printf_filtered ("static ");
4569 /* Typedef that is not a C++ class. */
4570 if (kind
== TYPES_DOMAIN
4571 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4572 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4573 /* variable, func, or typedef-that-is-c++-class. */
4574 else if (kind
< TYPES_DOMAIN
4575 || (kind
== TYPES_DOMAIN
4576 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4578 type_print (SYMBOL_TYPE (sym
),
4579 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4580 ? "" : SYMBOL_PRINT_NAME (sym
)),
4583 printf_filtered (";\n");
4587 /* This help function for symtab_symbol_info() prints information
4588 for non-debugging symbols to gdb_stdout. */
4591 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4593 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4596 if (gdbarch_addr_bit (gdbarch
) <= 32)
4597 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4598 & (CORE_ADDR
) 0xffffffff,
4601 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4603 printf_filtered ("%s %s\n",
4604 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4607 /* This is the guts of the commands "info functions", "info types", and
4608 "info variables". It calls search_symbols to find all matches and then
4609 print_[m]symbol_info to print out some useful information about the
4613 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4615 static const char * const classnames
[] =
4616 {"variable", "function", "type"};
4617 struct symbol_search
*symbols
;
4618 struct symbol_search
*p
;
4619 struct cleanup
*old_chain
;
4620 const char *last_filename
= NULL
;
4623 gdb_assert (kind
<= TYPES_DOMAIN
);
4625 /* Must make sure that if we're interrupted, symbols gets freed. */
4626 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4627 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4630 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4631 classnames
[kind
], regexp
);
4633 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4635 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4639 if (p
->msymbol
.minsym
!= NULL
)
4643 printf_filtered (_("\nNon-debugging symbols:\n"));
4646 print_msymbol_info (p
->msymbol
);
4650 print_symbol_info (kind
,
4655 = symtab_to_filename_for_display (symbol_symtab (p
->symbol
));
4659 do_cleanups (old_chain
);
4663 variables_info (char *regexp
, int from_tty
)
4665 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4669 functions_info (char *regexp
, int from_tty
)
4671 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4676 types_info (char *regexp
, int from_tty
)
4678 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4681 /* Breakpoint all functions matching regular expression. */
4684 rbreak_command_wrapper (char *regexp
, int from_tty
)
4686 rbreak_command (regexp
, from_tty
);
4689 /* A cleanup function that calls end_rbreak_breakpoints. */
4692 do_end_rbreak_breakpoints (void *ignore
)
4694 end_rbreak_breakpoints ();
4698 rbreak_command (char *regexp
, int from_tty
)
4700 struct symbol_search
*ss
;
4701 struct symbol_search
*p
;
4702 struct cleanup
*old_chain
;
4703 char *string
= NULL
;
4705 const char **files
= NULL
;
4706 const char *file_name
;
4711 char *colon
= strchr (regexp
, ':');
4713 if (colon
&& *(colon
+ 1) != ':')
4718 colon_index
= colon
- regexp
;
4719 local_name
= (char *) alloca (colon_index
+ 1);
4720 memcpy (local_name
, regexp
, colon_index
);
4721 local_name
[colon_index
--] = 0;
4722 while (isspace (local_name
[colon_index
]))
4723 local_name
[colon_index
--] = 0;
4724 file_name
= local_name
;
4727 regexp
= skip_spaces (colon
+ 1);
4731 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4732 old_chain
= make_cleanup_free_search_symbols (&ss
);
4733 make_cleanup (free_current_contents
, &string
);
4735 start_rbreak_breakpoints ();
4736 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4737 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4739 if (p
->msymbol
.minsym
== NULL
)
4741 struct symtab
*symtab
= symbol_symtab (p
->symbol
);
4742 const char *fullname
= symtab_to_fullname (symtab
);
4744 int newlen
= (strlen (fullname
)
4745 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4750 string
= (char *) xrealloc (string
, newlen
);
4753 strcpy (string
, fullname
);
4754 strcat (string
, ":'");
4755 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
4756 strcat (string
, "'");
4757 break_command (string
, from_tty
);
4758 print_symbol_info (FUNCTIONS_DOMAIN
,
4761 symtab_to_filename_for_display (symtab
));
4765 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4769 string
= (char *) xrealloc (string
, newlen
);
4772 strcpy (string
, "'");
4773 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4774 strcat (string
, "'");
4776 break_command (string
, from_tty
);
4777 printf_filtered ("<function, no debug info> %s;\n",
4778 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4782 do_cleanups (old_chain
);
4786 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4788 Either sym_text[sym_text_len] != '(' and then we search for any
4789 symbol starting with SYM_TEXT text.
4791 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4792 be terminated at that point. Partial symbol tables do not have parameters
4796 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4798 int (*ncmp
) (const char *, const char *, size_t);
4800 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4802 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4805 if (sym_text
[sym_text_len
] == '(')
4807 /* User searches for `name(someth...'. Require NAME to be terminated.
4808 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4809 present but accept even parameters presence. In this case this
4810 function is in fact strcmp_iw but whitespace skipping is not supported
4811 for tab completion. */
4813 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4820 /* Free any memory associated with a completion list. */
4823 free_completion_list (VEC (char_ptr
) **list_ptr
)
4828 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4830 VEC_free (char_ptr
, *list_ptr
);
4833 /* Callback for make_cleanup. */
4836 do_free_completion_list (void *list
)
4838 free_completion_list ((VEC (char_ptr
) **) list
);
4841 static VEC (char_ptr
) *return_val
;
4843 /* Tracker for how many unique completions have been generated. Used
4844 to terminate completion list generation early if the list has grown
4845 to a size so large as to be useless. This helps avoid GDB seeming
4846 to lock up in the event the user requests to complete on something
4847 vague that necessitates the time consuming expansion of many symbol
4850 static completion_tracker_t completion_tracker
;
4852 /* Test to see if the symbol specified by SYMNAME (which is already
4853 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4854 characters. If so, add it to the current completion list. */
4857 completion_list_add_name (const char *symname
,
4858 const char *sym_text
, int sym_text_len
,
4859 const char *text
, const char *word
)
4861 /* Clip symbols that cannot match. */
4862 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4865 /* We have a match for a completion, so add SYMNAME to the current list
4866 of matches. Note that the name is moved to freshly malloc'd space. */
4870 enum maybe_add_completion_enum add_status
;
4872 if (word
== sym_text
)
4874 newobj
= (char *) xmalloc (strlen (symname
) + 5);
4875 strcpy (newobj
, symname
);
4877 else if (word
> sym_text
)
4879 /* Return some portion of symname. */
4880 newobj
= (char *) xmalloc (strlen (symname
) + 5);
4881 strcpy (newobj
, symname
+ (word
- sym_text
));
4885 /* Return some of SYM_TEXT plus symname. */
4886 newobj
= (char *) xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4887 strncpy (newobj
, word
, sym_text
- word
);
4888 newobj
[sym_text
- word
] = '\0';
4889 strcat (newobj
, symname
);
4892 add_status
= maybe_add_completion (completion_tracker
, newobj
);
4896 case MAYBE_ADD_COMPLETION_OK
:
4897 VEC_safe_push (char_ptr
, return_val
, newobj
);
4899 case MAYBE_ADD_COMPLETION_OK_MAX_REACHED
:
4900 VEC_safe_push (char_ptr
, return_val
, newobj
);
4901 throw_max_completions_reached_error ();
4902 case MAYBE_ADD_COMPLETION_MAX_REACHED
:
4904 throw_max_completions_reached_error ();
4905 case MAYBE_ADD_COMPLETION_DUPLICATE
:
4912 /* completion_list_add_name wrapper for struct symbol. */
4915 completion_list_add_symbol (symbol
*sym
,
4916 const char *sym_text
, int sym_text_len
,
4917 const char *text
, const char *word
)
4919 completion_list_add_name (SYMBOL_NATURAL_NAME (sym
),
4920 sym_text
, sym_text_len
, text
, word
);
4923 /* completion_list_add_name wrapper for struct minimal_symbol. */
4926 completion_list_add_msymbol (minimal_symbol
*sym
,
4927 const char *sym_text
, int sym_text_len
,
4928 const char *text
, const char *word
)
4930 completion_list_add_name (MSYMBOL_NATURAL_NAME (sym
),
4931 sym_text
, sym_text_len
, text
, word
);
4934 /* ObjC: In case we are completing on a selector, look as the msymbol
4935 again and feed all the selectors into the mill. */
4938 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4939 const char *sym_text
, int sym_text_len
,
4940 const char *text
, const char *word
)
4942 static char *tmp
= NULL
;
4943 static unsigned int tmplen
= 0;
4945 const char *method
, *category
, *selector
;
4948 method
= MSYMBOL_NATURAL_NAME (msymbol
);
4950 /* Is it a method? */
4951 if ((method
[0] != '-') && (method
[0] != '+'))
4954 if (sym_text
[0] == '[')
4955 /* Complete on shortened method method. */
4956 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4958 while ((strlen (method
) + 1) >= tmplen
)
4964 tmp
= (char *) xrealloc (tmp
, tmplen
);
4966 selector
= strchr (method
, ' ');
4967 if (selector
!= NULL
)
4970 category
= strchr (method
, '(');
4972 if ((category
!= NULL
) && (selector
!= NULL
))
4974 memcpy (tmp
, method
, (category
- method
));
4975 tmp
[category
- method
] = ' ';
4976 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4977 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4978 if (sym_text
[0] == '[')
4979 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4982 if (selector
!= NULL
)
4984 /* Complete on selector only. */
4985 strcpy (tmp
, selector
);
4986 tmp2
= strchr (tmp
, ']');
4990 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4994 /* Break the non-quoted text based on the characters which are in
4995 symbols. FIXME: This should probably be language-specific. */
4998 language_search_unquoted_string (const char *text
, const char *p
)
5000 for (; p
> text
; --p
)
5002 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5006 if ((current_language
->la_language
== language_objc
))
5008 if (p
[-1] == ':') /* Might be part of a method name. */
5010 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5011 p
-= 2; /* Beginning of a method name. */
5012 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5013 { /* Might be part of a method name. */
5016 /* Seeing a ' ' or a '(' is not conclusive evidence
5017 that we are in the middle of a method name. However,
5018 finding "-[" or "+[" should be pretty un-ambiguous.
5019 Unfortunately we have to find it now to decide. */
5022 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5023 t
[-1] == ' ' || t
[-1] == ':' ||
5024 t
[-1] == '(' || t
[-1] == ')')
5029 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5030 p
= t
- 2; /* Method name detected. */
5031 /* Else we leave with p unchanged. */
5041 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
5042 int sym_text_len
, const char *text
,
5045 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5047 struct type
*t
= SYMBOL_TYPE (sym
);
5048 enum type_code c
= TYPE_CODE (t
);
5051 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5052 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5053 if (TYPE_FIELD_NAME (t
, j
))
5054 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
5055 sym_text
, sym_text_len
, text
, word
);
5059 /* Add matching symbols from SYMTAB to the current completion list. */
5062 add_symtab_completions (struct compunit_symtab
*cust
,
5063 const char *sym_text
, int sym_text_len
,
5064 const char *text
, const char *word
,
5065 enum type_code code
)
5068 const struct block
*b
;
5069 struct block_iterator iter
;
5075 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5078 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5079 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5081 if (code
== TYPE_CODE_UNDEF
5082 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5083 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5084 completion_list_add_symbol (sym
,
5085 sym_text
, sym_text_len
,
5092 default_make_symbol_completion_list_break_on_1 (const char *text
,
5094 const char *break_on
,
5095 enum type_code code
)
5097 /* Problem: All of the symbols have to be copied because readline
5098 frees them. I'm not going to worry about this; hopefully there
5099 won't be that many. */
5102 struct compunit_symtab
*cust
;
5103 struct minimal_symbol
*msymbol
;
5104 struct objfile
*objfile
;
5105 const struct block
*b
;
5106 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5107 struct block_iterator iter
;
5108 /* The symbol we are completing on. Points in same buffer as text. */
5109 const char *sym_text
;
5110 /* Length of sym_text. */
5112 struct cleanup
*cleanups
;
5114 /* Now look for the symbol we are supposed to complete on. */
5118 const char *quote_pos
= NULL
;
5120 /* First see if this is a quoted string. */
5122 for (p
= text
; *p
!= '\0'; ++p
)
5124 if (quote_found
!= '\0')
5126 if (*p
== quote_found
)
5127 /* Found close quote. */
5129 else if (*p
== '\\' && p
[1] == quote_found
)
5130 /* A backslash followed by the quote character
5131 doesn't end the string. */
5134 else if (*p
== '\'' || *p
== '"')
5140 if (quote_found
== '\'')
5141 /* A string within single quotes can be a symbol, so complete on it. */
5142 sym_text
= quote_pos
+ 1;
5143 else if (quote_found
== '"')
5144 /* A double-quoted string is never a symbol, nor does it make sense
5145 to complete it any other way. */
5151 /* It is not a quoted string. Break it based on the characters
5152 which are in symbols. */
5155 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5156 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5165 sym_text_len
= strlen (sym_text
);
5167 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
5169 if (current_language
->la_language
== language_cplus
5170 || current_language
->la_language
== language_fortran
)
5172 /* These languages may have parameters entered by user but they are never
5173 present in the partial symbol tables. */
5175 const char *cs
= (const char *) memchr (sym_text
, '(', sym_text_len
);
5178 sym_text_len
= cs
- sym_text
;
5180 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
5182 completion_tracker
= new_completion_tracker ();
5183 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5185 /* At this point scan through the misc symbol vectors and add each
5186 symbol you find to the list. Eventually we want to ignore
5187 anything that isn't a text symbol (everything else will be
5188 handled by the psymtab code below). */
5190 if (code
== TYPE_CODE_UNDEF
)
5192 ALL_MSYMBOLS (objfile
, msymbol
)
5195 completion_list_add_msymbol (msymbol
, sym_text
, sym_text_len
, text
,
5198 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
5203 /* Add completions for all currently loaded symbol tables. */
5204 ALL_COMPUNITS (objfile
, cust
)
5205 add_symtab_completions (cust
, sym_text
, sym_text_len
, text
, word
,
5208 /* Look through the partial symtabs for all symbols which begin by
5209 matching SYM_TEXT. Expand all CUs that you find to the list. */
5210 expand_symtabs_matching (NULL
,
5211 [&] (const char *name
) /* symbol matcher */
5213 return compare_symbol_name (name
,
5217 [&] (compunit_symtab
*symtab
) /* expansion notify */
5219 add_symtab_completions (symtab
,
5220 sym_text
, sym_text_len
,
5225 /* Search upwards from currently selected frame (so that we can
5226 complete on local vars). Also catch fields of types defined in
5227 this places which match our text string. Only complete on types
5228 visible from current context. */
5230 b
= get_selected_block (0);
5231 surrounding_static_block
= block_static_block (b
);
5232 surrounding_global_block
= block_global_block (b
);
5233 if (surrounding_static_block
!= NULL
)
5234 while (b
!= surrounding_static_block
)
5238 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5240 if (code
== TYPE_CODE_UNDEF
)
5242 completion_list_add_symbol (sym
, sym_text
, sym_text_len
, text
,
5244 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
5247 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5248 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5249 completion_list_add_symbol (sym
, sym_text
, sym_text_len
, text
,
5253 /* Stop when we encounter an enclosing function. Do not stop for
5254 non-inlined functions - the locals of the enclosing function
5255 are in scope for a nested function. */
5256 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5258 b
= BLOCK_SUPERBLOCK (b
);
5261 /* Add fields from the file's types; symbols will be added below. */
5263 if (code
== TYPE_CODE_UNDEF
)
5265 if (surrounding_static_block
!= NULL
)
5266 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5267 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5269 if (surrounding_global_block
!= NULL
)
5270 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5271 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5274 /* Skip macros if we are completing a struct tag -- arguable but
5275 usually what is expected. */
5276 if (current_language
->la_macro_expansion
== macro_expansion_c
5277 && code
== TYPE_CODE_UNDEF
)
5279 struct macro_scope
*scope
;
5281 /* This adds a macro's name to the current completion list. */
5282 auto add_macro_name
= [&] (const char *macro_name
,
5283 const macro_definition
*,
5284 macro_source_file
*,
5287 completion_list_add_name (macro_name
,
5288 sym_text
, sym_text_len
,
5292 /* Add any macros visible in the default scope. Note that this
5293 may yield the occasional wrong result, because an expression
5294 might be evaluated in a scope other than the default. For
5295 example, if the user types "break file:line if <TAB>", the
5296 resulting expression will be evaluated at "file:line" -- but
5297 at there does not seem to be a way to detect this at
5299 scope
= default_macro_scope ();
5302 macro_for_each_in_scope (scope
->file
, scope
->line
,
5307 /* User-defined macros are always visible. */
5308 macro_for_each (macro_user_macros
, add_macro_name
);
5311 do_cleanups (cleanups
);
5315 default_make_symbol_completion_list_break_on (const char *text
,
5317 const char *break_on
,
5318 enum type_code code
)
5320 struct cleanup
*back_to
;
5323 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5327 default_make_symbol_completion_list_break_on_1 (text
, word
,
5330 CATCH (except
, RETURN_MASK_ERROR
)
5332 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5333 throw_exception (except
);
5337 discard_cleanups (back_to
);
5342 default_make_symbol_completion_list (const char *text
, const char *word
,
5343 enum type_code code
)
5345 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
5348 /* Return a vector of all symbols (regardless of class) which begin by
5349 matching TEXT. If the answer is no symbols, then the return value
5353 make_symbol_completion_list (const char *text
, const char *word
)
5355 return current_language
->la_make_symbol_completion_list (text
, word
,
5359 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
5360 symbols whose type code is CODE. */
5363 make_symbol_completion_type (const char *text
, const char *word
,
5364 enum type_code code
)
5366 gdb_assert (code
== TYPE_CODE_UNION
5367 || code
== TYPE_CODE_STRUCT
5368 || code
== TYPE_CODE_ENUM
);
5369 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
5372 /* Like make_symbol_completion_list, but suitable for use as a
5373 completion function. */
5376 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
5377 const char *text
, const char *word
)
5379 return make_symbol_completion_list (text
, word
);
5382 /* Like make_symbol_completion_list, but returns a list of symbols
5383 defined in all source files name SRCFILE. */
5385 static VEC (char_ptr
) *
5386 make_file_symbol_completion_list_1 (const char *text
, const char *word
,
5387 const char *srcfile
)
5389 /* The symbol we are completing on. Points in same buffer as text. */
5390 const char *sym_text
;
5391 /* Length of sym_text. */
5394 /* Now look for the symbol we are supposed to complete on.
5395 FIXME: This should be language-specific. */
5399 const char *quote_pos
= NULL
;
5401 /* First see if this is a quoted string. */
5403 for (p
= text
; *p
!= '\0'; ++p
)
5405 if (quote_found
!= '\0')
5407 if (*p
== quote_found
)
5408 /* Found close quote. */
5410 else if (*p
== '\\' && p
[1] == quote_found
)
5411 /* A backslash followed by the quote character
5412 doesn't end the string. */
5415 else if (*p
== '\'' || *p
== '"')
5421 if (quote_found
== '\'')
5422 /* A string within single quotes can be a symbol, so complete on it. */
5423 sym_text
= quote_pos
+ 1;
5424 else if (quote_found
== '"')
5425 /* A double-quoted string is never a symbol, nor does it make sense
5426 to complete it any other way. */
5432 /* Not a quoted string. */
5433 sym_text
= language_search_unquoted_string (text
, p
);
5437 sym_text_len
= strlen (sym_text
);
5439 /* Go through symtabs for SRCFILE and check the externs and statics
5440 for symbols which match. */
5441 iterate_over_symtabs (srcfile
, [&] (symtab
*s
)
5443 add_symtab_completions (SYMTAB_COMPUNIT (s
),
5444 sym_text
, sym_text_len
,
5445 text
, word
, TYPE_CODE_UNDEF
);
5449 return (return_val
);
5452 /* Wrapper around make_file_symbol_completion_list_1
5453 to handle MAX_COMPLETIONS_REACHED_ERROR. */
5456 make_file_symbol_completion_list (const char *text
, const char *word
,
5457 const char *srcfile
)
5459 struct cleanup
*back_to
, *cleanups
;
5461 completion_tracker
= new_completion_tracker ();
5462 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5464 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5468 make_file_symbol_completion_list_1 (text
, word
, srcfile
);
5470 CATCH (except
, RETURN_MASK_ERROR
)
5472 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5473 throw_exception (except
);
5477 discard_cleanups (back_to
);
5478 do_cleanups (cleanups
);
5482 /* A helper function for make_source_files_completion_list. It adds
5483 another file name to a list of possible completions, growing the
5484 list as necessary. */
5487 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5488 VEC (char_ptr
) **list
)
5491 size_t fnlen
= strlen (fname
);
5495 /* Return exactly fname. */
5496 newobj
= (char *) xmalloc (fnlen
+ 5);
5497 strcpy (newobj
, fname
);
5499 else if (word
> text
)
5501 /* Return some portion of fname. */
5502 newobj
= (char *) xmalloc (fnlen
+ 5);
5503 strcpy (newobj
, fname
+ (word
- text
));
5507 /* Return some of TEXT plus fname. */
5508 newobj
= (char *) xmalloc (fnlen
+ (text
- word
) + 5);
5509 strncpy (newobj
, word
, text
- word
);
5510 newobj
[text
- word
] = '\0';
5511 strcat (newobj
, fname
);
5513 VEC_safe_push (char_ptr
, *list
, newobj
);
5517 not_interesting_fname (const char *fname
)
5519 static const char *illegal_aliens
[] = {
5520 "_globals_", /* inserted by coff_symtab_read */
5525 for (i
= 0; illegal_aliens
[i
]; i
++)
5527 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5533 /* An object of this type is passed as the user_data argument to
5534 map_partial_symbol_filenames. */
5535 struct add_partial_filename_data
5537 struct filename_seen_cache
*filename_seen_cache
;
5541 VEC (char_ptr
) **list
;
5544 /* A callback for map_partial_symbol_filenames. */
5547 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5550 struct add_partial_filename_data
*data
5551 = (struct add_partial_filename_data
*) user_data
;
5553 if (not_interesting_fname (filename
))
5555 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
5556 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5558 /* This file matches for a completion; add it to the
5559 current list of matches. */
5560 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5564 const char *base_name
= lbasename (filename
);
5566 if (base_name
!= filename
5567 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
5568 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5569 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5573 /* Return a vector of all source files whose names begin with matching
5574 TEXT. The file names are looked up in the symbol tables of this
5575 program. If the answer is no matchess, then the return value is
5579 make_source_files_completion_list (const char *text
, const char *word
)
5581 struct compunit_symtab
*cu
;
5583 struct objfile
*objfile
;
5584 size_t text_len
= strlen (text
);
5585 VEC (char_ptr
) *list
= NULL
;
5586 const char *base_name
;
5587 struct add_partial_filename_data datum
;
5588 struct filename_seen_cache
*filename_seen_cache
;
5589 struct cleanup
*back_to
, *cache_cleanup
;
5591 if (!have_full_symbols () && !have_partial_symbols ())
5594 back_to
= make_cleanup (do_free_completion_list
, &list
);
5596 filename_seen_cache
= create_filename_seen_cache ();
5597 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
5598 filename_seen_cache
);
5600 ALL_FILETABS (objfile
, cu
, s
)
5602 if (not_interesting_fname (s
->filename
))
5604 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
5605 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5607 /* This file matches for a completion; add it to the current
5609 add_filename_to_list (s
->filename
, text
, word
, &list
);
5613 /* NOTE: We allow the user to type a base name when the
5614 debug info records leading directories, but not the other
5615 way around. This is what subroutines of breakpoint
5616 command do when they parse file names. */
5617 base_name
= lbasename (s
->filename
);
5618 if (base_name
!= s
->filename
5619 && !filename_seen (filename_seen_cache
, base_name
, 1)
5620 && filename_ncmp (base_name
, text
, text_len
) == 0)
5621 add_filename_to_list (base_name
, text
, word
, &list
);
5625 datum
.filename_seen_cache
= filename_seen_cache
;
5628 datum
.text_len
= text_len
;
5630 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5631 0 /*need_fullname*/);
5633 do_cleanups (cache_cleanup
);
5634 discard_cleanups (back_to
);
5641 /* Return the "main_info" object for the current program space. If
5642 the object has not yet been created, create it and fill in some
5645 static struct main_info
*
5646 get_main_info (void)
5648 struct main_info
*info
5649 = (struct main_info
*) program_space_data (current_program_space
,
5650 main_progspace_key
);
5654 /* It may seem strange to store the main name in the progspace
5655 and also in whatever objfile happens to see a main name in
5656 its debug info. The reason for this is mainly historical:
5657 gdb returned "main" as the name even if no function named
5658 "main" was defined the program; and this approach lets us
5659 keep compatibility. */
5660 info
= XCNEW (struct main_info
);
5661 info
->language_of_main
= language_unknown
;
5662 set_program_space_data (current_program_space
, main_progspace_key
,
5669 /* A cleanup to destroy a struct main_info when a progspace is
5673 main_info_cleanup (struct program_space
*pspace
, void *data
)
5675 struct main_info
*info
= (struct main_info
*) data
;
5678 xfree (info
->name_of_main
);
5683 set_main_name (const char *name
, enum language lang
)
5685 struct main_info
*info
= get_main_info ();
5687 if (info
->name_of_main
!= NULL
)
5689 xfree (info
->name_of_main
);
5690 info
->name_of_main
= NULL
;
5691 info
->language_of_main
= language_unknown
;
5695 info
->name_of_main
= xstrdup (name
);
5696 info
->language_of_main
= lang
;
5700 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5704 find_main_name (void)
5706 const char *new_main_name
;
5707 struct objfile
*objfile
;
5709 /* First check the objfiles to see whether a debuginfo reader has
5710 picked up the appropriate main name. Historically the main name
5711 was found in a more or less random way; this approach instead
5712 relies on the order of objfile creation -- which still isn't
5713 guaranteed to get the correct answer, but is just probably more
5715 ALL_OBJFILES (objfile
)
5717 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5719 set_main_name (objfile
->per_bfd
->name_of_main
,
5720 objfile
->per_bfd
->language_of_main
);
5725 /* Try to see if the main procedure is in Ada. */
5726 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5727 be to add a new method in the language vector, and call this
5728 method for each language until one of them returns a non-empty
5729 name. This would allow us to remove this hard-coded call to
5730 an Ada function. It is not clear that this is a better approach
5731 at this point, because all methods need to be written in a way
5732 such that false positives never be returned. For instance, it is
5733 important that a method does not return a wrong name for the main
5734 procedure if the main procedure is actually written in a different
5735 language. It is easy to guaranty this with Ada, since we use a
5736 special symbol generated only when the main in Ada to find the name
5737 of the main procedure. It is difficult however to see how this can
5738 be guarantied for languages such as C, for instance. This suggests
5739 that order of call for these methods becomes important, which means
5740 a more complicated approach. */
5741 new_main_name
= ada_main_name ();
5742 if (new_main_name
!= NULL
)
5744 set_main_name (new_main_name
, language_ada
);
5748 new_main_name
= d_main_name ();
5749 if (new_main_name
!= NULL
)
5751 set_main_name (new_main_name
, language_d
);
5755 new_main_name
= go_main_name ();
5756 if (new_main_name
!= NULL
)
5758 set_main_name (new_main_name
, language_go
);
5762 new_main_name
= pascal_main_name ();
5763 if (new_main_name
!= NULL
)
5765 set_main_name (new_main_name
, language_pascal
);
5769 /* The languages above didn't identify the name of the main procedure.
5770 Fallback to "main". */
5771 set_main_name ("main", language_unknown
);
5777 struct main_info
*info
= get_main_info ();
5779 if (info
->name_of_main
== NULL
)
5782 return info
->name_of_main
;
5785 /* Return the language of the main function. If it is not known,
5786 return language_unknown. */
5789 main_language (void)
5791 struct main_info
*info
= get_main_info ();
5793 if (info
->name_of_main
== NULL
)
5796 return info
->language_of_main
;
5799 /* Handle ``executable_changed'' events for the symtab module. */
5802 symtab_observer_executable_changed (void)
5804 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5805 set_main_name (NULL
, language_unknown
);
5808 /* Return 1 if the supplied producer string matches the ARM RealView
5809 compiler (armcc). */
5812 producer_is_realview (const char *producer
)
5814 static const char *const arm_idents
[] = {
5815 "ARM C Compiler, ADS",
5816 "Thumb C Compiler, ADS",
5817 "ARM C++ Compiler, ADS",
5818 "Thumb C++ Compiler, ADS",
5819 "ARM/Thumb C/C++ Compiler, RVCT",
5820 "ARM C/C++ Compiler, RVCT"
5824 if (producer
== NULL
)
5827 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5828 if (startswith (producer
, arm_idents
[i
]))
5836 /* The next index to hand out in response to a registration request. */
5838 static int next_aclass_value
= LOC_FINAL_VALUE
;
5840 /* The maximum number of "aclass" registrations we support. This is
5841 constant for convenience. */
5842 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5844 /* The objects representing the various "aclass" values. The elements
5845 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5846 elements are those registered at gdb initialization time. */
5848 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
5850 /* The globally visible pointer. This is separate from 'symbol_impl'
5851 so that it can be const. */
5853 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
5855 /* Make sure we saved enough room in struct symbol. */
5857 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
5859 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5860 is the ops vector associated with this index. This returns the new
5861 index, which should be used as the aclass_index field for symbols
5865 register_symbol_computed_impl (enum address_class aclass
,
5866 const struct symbol_computed_ops
*ops
)
5868 int result
= next_aclass_value
++;
5870 gdb_assert (aclass
== LOC_COMPUTED
);
5871 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5872 symbol_impl
[result
].aclass
= aclass
;
5873 symbol_impl
[result
].ops_computed
= ops
;
5875 /* Sanity check OPS. */
5876 gdb_assert (ops
!= NULL
);
5877 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
5878 gdb_assert (ops
->describe_location
!= NULL
);
5879 gdb_assert (ops
->get_symbol_read_needs
!= NULL
);
5880 gdb_assert (ops
->read_variable
!= NULL
);
5885 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5886 OPS is the ops vector associated with this index. This returns the
5887 new index, which should be used as the aclass_index field for symbols
5891 register_symbol_block_impl (enum address_class aclass
,
5892 const struct symbol_block_ops
*ops
)
5894 int result
= next_aclass_value
++;
5896 gdb_assert (aclass
== LOC_BLOCK
);
5897 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5898 symbol_impl
[result
].aclass
= aclass
;
5899 symbol_impl
[result
].ops_block
= ops
;
5901 /* Sanity check OPS. */
5902 gdb_assert (ops
!= NULL
);
5903 gdb_assert (ops
->find_frame_base_location
!= NULL
);
5908 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5909 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5910 this index. This returns the new index, which should be used as
5911 the aclass_index field for symbols of this type. */
5914 register_symbol_register_impl (enum address_class aclass
,
5915 const struct symbol_register_ops
*ops
)
5917 int result
= next_aclass_value
++;
5919 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
5920 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5921 symbol_impl
[result
].aclass
= aclass
;
5922 symbol_impl
[result
].ops_register
= ops
;
5927 /* Initialize elements of 'symbol_impl' for the constants in enum
5931 initialize_ordinary_address_classes (void)
5935 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
5936 symbol_impl
[i
].aclass
= (enum address_class
) i
;
5941 /* Helper function to initialize the fields of an objfile-owned symbol.
5942 It assumed that *SYM is already all zeroes. */
5945 initialize_objfile_symbol_1 (struct symbol
*sym
)
5947 SYMBOL_OBJFILE_OWNED (sym
) = 1;
5948 SYMBOL_SECTION (sym
) = -1;
5951 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
5954 initialize_objfile_symbol (struct symbol
*sym
)
5956 memset (sym
, 0, sizeof (*sym
));
5957 initialize_objfile_symbol_1 (sym
);
5960 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
5964 allocate_symbol (struct objfile
*objfile
)
5966 struct symbol
*result
;
5968 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5969 initialize_objfile_symbol_1 (result
);
5974 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
5977 struct template_symbol
*
5978 allocate_template_symbol (struct objfile
*objfile
)
5980 struct template_symbol
*result
;
5982 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
5983 initialize_objfile_symbol_1 (&result
->base
);
5991 symbol_objfile (const struct symbol
*symbol
)
5993 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
5994 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6000 symbol_arch (const struct symbol
*symbol
)
6002 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6003 return symbol
->owner
.arch
;
6004 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6010 symbol_symtab (const struct symbol
*symbol
)
6012 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6013 return symbol
->owner
.symtab
;
6019 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6021 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6022 symbol
->owner
.symtab
= symtab
;
6028 _initialize_symtab (void)
6030 initialize_ordinary_address_classes ();
6033 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6036 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6038 add_info ("variables", variables_info
, _("\
6039 All global and static variable names, or those matching REGEXP."));
6041 add_com ("whereis", class_info
, variables_info
, _("\
6042 All global and static variable names, or those matching REGEXP."));
6044 add_info ("functions", functions_info
,
6045 _("All function names, or those matching REGEXP."));
6047 /* FIXME: This command has at least the following problems:
6048 1. It prints builtin types (in a very strange and confusing fashion).
6049 2. It doesn't print right, e.g. with
6050 typedef struct foo *FOO
6051 type_print prints "FOO" when we want to make it (in this situation)
6052 print "struct foo *".
6053 I also think "ptype" or "whatis" is more likely to be useful (but if
6054 there is much disagreement "info types" can be fixed). */
6055 add_info ("types", types_info
,
6056 _("All type names, or those matching REGEXP."));
6058 add_info ("sources", sources_info
,
6059 _("Source files in the program."));
6061 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6062 _("Set a breakpoint for all functions matching REGEXP."));
6064 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6065 multiple_symbols_modes
, &multiple_symbols_mode
,
6067 Set the debugger behavior when more than one symbol are possible matches\n\
6068 in an expression."), _("\
6069 Show how the debugger handles ambiguities in expressions."), _("\
6070 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6071 NULL
, NULL
, &setlist
, &showlist
);
6073 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6074 &basenames_may_differ
, _("\
6075 Set whether a source file may have multiple base names."), _("\
6076 Show whether a source file may have multiple base names."), _("\
6077 (A \"base name\" is the name of a file with the directory part removed.\n\
6078 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6079 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6080 before comparing them. Canonicalization is an expensive operation,\n\
6081 but it allows the same file be known by more than one base name.\n\
6082 If not set (the default), all source files are assumed to have just\n\
6083 one base name, and gdb will do file name comparisons more efficiently."),
6085 &setlist
, &showlist
);
6087 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6088 _("Set debugging of symbol table creation."),
6089 _("Show debugging of symbol table creation."), _("\
6090 When enabled (non-zero), debugging messages are printed when building\n\
6091 symbol tables. A value of 1 (one) normally provides enough information.\n\
6092 A value greater than 1 provides more verbose information."),
6095 &setdebuglist
, &showdebuglist
);
6097 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6099 Set debugging of symbol lookup."), _("\
6100 Show debugging of symbol lookup."), _("\
6101 When enabled (non-zero), symbol lookups are logged."),
6103 &setdebuglist
, &showdebuglist
);
6105 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6106 &new_symbol_cache_size
,
6107 _("Set the size of the symbol cache."),
6108 _("Show the size of the symbol cache."), _("\
6109 The size of the symbol cache.\n\
6110 If zero then the symbol cache is disabled."),
6111 set_symbol_cache_size_handler
, NULL
,
6112 &maintenance_set_cmdlist
,
6113 &maintenance_show_cmdlist
);
6115 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6116 _("Dump the symbol cache for each program space."),
6117 &maintenanceprintlist
);
6119 add_cmd ("symbol-cache-statistics", class_maintenance
,
6120 maintenance_print_symbol_cache_statistics
,
6121 _("Print symbol cache statistics for each program space."),
6122 &maintenanceprintlist
);
6124 add_cmd ("flush-symbol-cache", class_maintenance
,
6125 maintenance_flush_symbol_cache
,
6126 _("Flush the symbol cache for each program space."),
6129 observer_attach_executable_changed (symtab_observer_executable_changed
);
6130 observer_attach_new_objfile (symtab_new_objfile_observer
);
6131 observer_attach_free_objfile (symtab_free_objfile_observer
);