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"
66 /* Forward declarations for local functions. */
68 static void rbreak_command (char *, int);
70 static int find_line_common (struct linetable
*, int, int *, int);
72 static struct block_symbol
73 lookup_symbol_aux (const char *name
,
74 const struct block
*block
,
75 const domain_enum domain
,
76 enum language language
,
77 struct field_of_this_result
*);
80 struct block_symbol
lookup_local_symbol (const char *name
,
81 const struct block
*block
,
82 const domain_enum domain
,
83 enum language language
);
85 static struct block_symbol
86 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
87 const char *name
, const domain_enum domain
);
90 const struct block_symbol null_block_symbol
= { NULL
, NULL
};
92 extern initialize_file_ftype _initialize_symtab
;
94 /* Program space key for finding name and language of "main". */
96 static const struct program_space_data
*main_progspace_key
;
98 /* Type of the data stored on the program space. */
102 /* Name of "main". */
106 /* Language of "main". */
108 enum language language_of_main
;
111 /* Program space key for finding its symbol cache. */
113 static const struct program_space_data
*symbol_cache_key
;
115 /* The default symbol cache size.
116 There is no extra cpu cost for large N (except when flushing the cache,
117 which is rare). The value here is just a first attempt. A better default
118 value may be higher or lower. A prime number can make up for a bad hash
119 computation, so that's why the number is what it is. */
120 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
122 /* The maximum symbol cache size.
123 There's no method to the decision of what value to use here, other than
124 there's no point in allowing a user typo to make gdb consume all memory. */
125 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
127 /* symbol_cache_lookup returns this if a previous lookup failed to find the
128 symbol in any objfile. */
129 #define SYMBOL_LOOKUP_FAILED \
130 ((struct block_symbol) {(struct symbol *) 1, NULL})
131 #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)
133 /* Recording lookups that don't find the symbol is just as important, if not
134 more so, than recording found symbols. */
136 enum symbol_cache_slot_state
139 SYMBOL_SLOT_NOT_FOUND
,
143 struct symbol_cache_slot
145 enum symbol_cache_slot_state state
;
147 /* The objfile that was current when the symbol was looked up.
148 This is only needed for global blocks, but for simplicity's sake
149 we allocate the space for both. If data shows the extra space used
150 for static blocks is a problem, we can split things up then.
152 Global blocks need cache lookup to include the objfile context because
153 we need to account for gdbarch_iterate_over_objfiles_in_search_order
154 which can traverse objfiles in, effectively, any order, depending on
155 the current objfile, thus affecting which symbol is found. Normally,
156 only the current objfile is searched first, and then the rest are
157 searched in recorded order; but putting cache lookup inside
158 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
159 Instead we just make the current objfile part of the context of
160 cache lookup. This means we can record the same symbol multiple times,
161 each with a different "current objfile" that was in effect when the
162 lookup was saved in the cache, but cache space is pretty cheap. */
163 const struct objfile
*objfile_context
;
167 struct block_symbol found
;
176 /* Symbols don't specify global vs static block.
177 So keep them in separate caches. */
179 struct block_symbol_cache
183 unsigned int collisions
;
185 /* SYMBOLS is a variable length array of this size.
186 One can imagine that in general one cache (global/static) should be a
187 fraction of the size of the other, but there's no data at the moment
188 on which to decide. */
191 struct symbol_cache_slot symbols
[1];
196 Searching for symbols in the static and global blocks over multiple objfiles
197 again and again can be slow, as can searching very big objfiles. This is a
198 simple cache to improve symbol lookup performance, which is critical to
199 overall gdb performance.
201 Symbols are hashed on the name, its domain, and block.
202 They are also hashed on their objfile for objfile-specific lookups. */
206 struct block_symbol_cache
*global_symbols
;
207 struct block_symbol_cache
*static_symbols
;
210 /* When non-zero, print debugging messages related to symtab creation. */
211 unsigned int symtab_create_debug
= 0;
213 /* When non-zero, print debugging messages related to symbol lookup. */
214 unsigned int symbol_lookup_debug
= 0;
216 /* The size of the cache is staged here. */
217 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
219 /* The current value of the symbol cache size.
220 This is saved so that if the user enters a value too big we can restore
221 the original value from here. */
222 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
224 /* Non-zero if a file may be known by two different basenames.
225 This is the uncommon case, and significantly slows down gdb.
226 Default set to "off" to not slow down the common case. */
227 int basenames_may_differ
= 0;
229 /* Allow the user to configure the debugger behavior with respect
230 to multiple-choice menus when more than one symbol matches during
233 const char multiple_symbols_ask
[] = "ask";
234 const char multiple_symbols_all
[] = "all";
235 const char multiple_symbols_cancel
[] = "cancel";
236 static const char *const multiple_symbols_modes
[] =
238 multiple_symbols_ask
,
239 multiple_symbols_all
,
240 multiple_symbols_cancel
,
243 static const char *multiple_symbols_mode
= multiple_symbols_all
;
245 /* Read-only accessor to AUTO_SELECT_MODE. */
248 multiple_symbols_select_mode (void)
250 return multiple_symbols_mode
;
253 /* Return the name of a domain_enum. */
256 domain_name (domain_enum e
)
260 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
261 case VAR_DOMAIN
: return "VAR_DOMAIN";
262 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
263 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
264 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
265 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
266 default: gdb_assert_not_reached ("bad domain_enum");
270 /* Return the name of a search_domain . */
273 search_domain_name (enum search_domain e
)
277 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
278 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
279 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
280 case ALL_DOMAIN
: return "ALL_DOMAIN";
281 default: gdb_assert_not_reached ("bad search_domain");
288 compunit_primary_filetab (const struct compunit_symtab
*cust
)
290 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
292 /* The primary file symtab is the first one in the list. */
293 return COMPUNIT_FILETABS (cust
);
299 compunit_language (const struct compunit_symtab
*cust
)
301 struct symtab
*symtab
= compunit_primary_filetab (cust
);
303 /* The language of the compunit symtab is the language of its primary
305 return SYMTAB_LANGUAGE (symtab
);
308 /* See whether FILENAME matches SEARCH_NAME using the rule that we
309 advertise to the user. (The manual's description of linespecs
310 describes what we advertise). Returns true if they match, false
314 compare_filenames_for_search (const char *filename
, const char *search_name
)
316 int len
= strlen (filename
);
317 size_t search_len
= strlen (search_name
);
319 if (len
< search_len
)
322 /* The tail of FILENAME must match. */
323 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
326 /* Either the names must completely match, or the character
327 preceding the trailing SEARCH_NAME segment of FILENAME must be a
330 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
331 cannot match FILENAME "/path//dir/file.c" - as user has requested
332 absolute path. The sama applies for "c:\file.c" possibly
333 incorrectly hypothetically matching "d:\dir\c:\file.c".
335 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
336 compatible with SEARCH_NAME "file.c". In such case a compiler had
337 to put the "c:file.c" name into debug info. Such compatibility
338 works only on GDB built for DOS host. */
339 return (len
== search_len
340 || (!IS_ABSOLUTE_PATH (search_name
)
341 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
342 || (HAS_DRIVE_SPEC (filename
)
343 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
346 /* Same as compare_filenames_for_search, but for glob-style patterns.
347 Heads up on the order of the arguments. They match the order of
348 compare_filenames_for_search, but it's the opposite of the order of
349 arguments to gdb_filename_fnmatch. */
352 compare_glob_filenames_for_search (const char *filename
,
353 const char *search_name
)
355 /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
356 all /s have to be explicitly specified. */
357 int file_path_elements
= count_path_elements (filename
);
358 int search_path_elements
= count_path_elements (search_name
);
360 if (search_path_elements
> file_path_elements
)
363 if (IS_ABSOLUTE_PATH (search_name
))
365 return (search_path_elements
== file_path_elements
366 && gdb_filename_fnmatch (search_name
, filename
,
367 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0);
371 const char *file_to_compare
372 = strip_leading_path_elements (filename
,
373 file_path_elements
- search_path_elements
);
375 return gdb_filename_fnmatch (search_name
, file_to_compare
,
376 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0;
380 /* Check for a symtab of a specific name by searching some symtabs.
381 This is a helper function for callbacks of iterate_over_symtabs.
383 If NAME is not absolute, then REAL_PATH is NULL
384 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
386 The return value, NAME, REAL_PATH and CALLBACK are identical to the
387 `map_symtabs_matching_filename' method of quick_symbol_functions.
389 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
390 Each symtab within the specified compunit symtab is also searched.
391 AFTER_LAST is one past the last compunit symtab to search; NULL means to
392 search until the end of the list. */
395 iterate_over_some_symtabs (const char *name
,
396 const char *real_path
,
397 struct compunit_symtab
*first
,
398 struct compunit_symtab
*after_last
,
399 gdb::function_view
<bool (symtab
*)> callback
)
401 struct compunit_symtab
*cust
;
403 const char* base_name
= lbasename (name
);
405 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
407 ALL_COMPUNIT_FILETABS (cust
, s
)
409 if (compare_filenames_for_search (s
->filename
, name
))
416 /* Before we invoke realpath, which can get expensive when many
417 files are involved, do a quick comparison of the basenames. */
418 if (! basenames_may_differ
419 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
422 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
429 /* If the user gave us an absolute path, try to find the file in
430 this symtab and use its absolute path. */
431 if (real_path
!= NULL
)
433 const char *fullname
= symtab_to_fullname (s
);
435 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
436 gdb_assert (IS_ABSOLUTE_PATH (name
));
437 if (FILENAME_CMP (real_path
, fullname
) == 0)
450 /* Check for a symtab of a specific name; first in symtabs, then in
451 psymtabs. *If* there is no '/' in the name, a match after a '/'
452 in the symtab filename will also work.
454 Calls CALLBACK with each symtab that is found. If CALLBACK returns
455 true, the search stops. */
458 iterate_over_symtabs (const char *name
,
459 gdb::function_view
<bool (symtab
*)> callback
)
461 struct objfile
*objfile
;
462 gdb::unique_xmalloc_ptr
<char> real_path
;
464 /* Here we are interested in canonicalizing an absolute path, not
465 absolutizing a relative path. */
466 if (IS_ABSOLUTE_PATH (name
))
468 real_path
.reset (gdb_realpath (name
));
469 gdb_assert (IS_ABSOLUTE_PATH (real_path
.get ()));
472 ALL_OBJFILES (objfile
)
474 if (iterate_over_some_symtabs (name
, real_path
.get (),
475 objfile
->compunit_symtabs
, NULL
,
480 /* Same search rules as above apply here, but now we look thru the
483 ALL_OBJFILES (objfile
)
486 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
494 /* A wrapper for iterate_over_symtabs that returns the first matching
498 lookup_symtab (const char *name
)
500 struct symtab
*result
= NULL
;
502 iterate_over_symtabs (name
, [&] (symtab
*symtab
)
512 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
513 full method name, which consist of the class name (from T), the unadorned
514 method name from METHOD_ID, and the signature for the specific overload,
515 specified by SIGNATURE_ID. Note that this function is g++ specific. */
518 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
520 int mangled_name_len
;
522 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
523 struct fn_field
*method
= &f
[signature_id
];
524 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
525 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
526 const char *newname
= type_name_no_tag (type
);
528 /* Does the form of physname indicate that it is the full mangled name
529 of a constructor (not just the args)? */
530 int is_full_physname_constructor
;
533 int is_destructor
= is_destructor_name (physname
);
534 /* Need a new type prefix. */
535 const char *const_prefix
= method
->is_const
? "C" : "";
536 const char *volatile_prefix
= method
->is_volatile
? "V" : "";
538 int len
= (newname
== NULL
? 0 : strlen (newname
));
540 /* Nothing to do if physname already contains a fully mangled v3 abi name
541 or an operator name. */
542 if ((physname
[0] == '_' && physname
[1] == 'Z')
543 || is_operator_name (field_name
))
544 return xstrdup (physname
);
546 is_full_physname_constructor
= is_constructor_name (physname
);
548 is_constructor
= is_full_physname_constructor
549 || (newname
&& strcmp (field_name
, newname
) == 0);
552 is_destructor
= (startswith (physname
, "__dt"));
554 if (is_destructor
|| is_full_physname_constructor
)
556 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
557 strcpy (mangled_name
, physname
);
563 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
565 else if (physname
[0] == 't' || physname
[0] == 'Q')
567 /* The physname for template and qualified methods already includes
569 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
575 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
576 volatile_prefix
, len
);
578 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
579 + strlen (buf
) + len
+ strlen (physname
) + 1);
581 mangled_name
= (char *) xmalloc (mangled_name_len
);
583 mangled_name
[0] = '\0';
585 strcpy (mangled_name
, field_name
);
587 strcat (mangled_name
, buf
);
588 /* If the class doesn't have a name, i.e. newname NULL, then we just
589 mangle it using 0 for the length of the class. Thus it gets mangled
590 as something starting with `::' rather than `classname::'. */
592 strcat (mangled_name
, newname
);
594 strcat (mangled_name
, physname
);
595 return (mangled_name
);
598 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
599 correctly allocated. */
602 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
604 struct obstack
*obstack
)
606 if (gsymbol
->language
== language_ada
)
610 gsymbol
->ada_mangled
= 0;
611 gsymbol
->language_specific
.obstack
= obstack
;
615 gsymbol
->ada_mangled
= 1;
616 gsymbol
->language_specific
.demangled_name
= name
;
620 gsymbol
->language_specific
.demangled_name
= name
;
623 /* Return the demangled name of GSYMBOL. */
626 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
628 if (gsymbol
->language
== language_ada
)
630 if (!gsymbol
->ada_mangled
)
635 return gsymbol
->language_specific
.demangled_name
;
639 /* Initialize the language dependent portion of a symbol
640 depending upon the language for the symbol. */
643 symbol_set_language (struct general_symbol_info
*gsymbol
,
644 enum language language
,
645 struct obstack
*obstack
)
647 gsymbol
->language
= language
;
648 if (gsymbol
->language
== language_cplus
649 || gsymbol
->language
== language_d
650 || gsymbol
->language
== language_go
651 || gsymbol
->language
== language_objc
652 || gsymbol
->language
== language_fortran
)
654 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
656 else if (gsymbol
->language
== language_ada
)
658 gdb_assert (gsymbol
->ada_mangled
== 0);
659 gsymbol
->language_specific
.obstack
= obstack
;
663 memset (&gsymbol
->language_specific
, 0,
664 sizeof (gsymbol
->language_specific
));
668 /* Functions to initialize a symbol's mangled name. */
670 /* Objects of this type are stored in the demangled name hash table. */
671 struct demangled_name_entry
677 /* Hash function for the demangled name hash. */
680 hash_demangled_name_entry (const void *data
)
682 const struct demangled_name_entry
*e
683 = (const struct demangled_name_entry
*) data
;
685 return htab_hash_string (e
->mangled
);
688 /* Equality function for the demangled name hash. */
691 eq_demangled_name_entry (const void *a
, const void *b
)
693 const struct demangled_name_entry
*da
694 = (const struct demangled_name_entry
*) a
;
695 const struct demangled_name_entry
*db
696 = (const struct demangled_name_entry
*) b
;
698 return strcmp (da
->mangled
, db
->mangled
) == 0;
701 /* Create the hash table used for demangled names. Each hash entry is
702 a pair of strings; one for the mangled name and one for the demangled
703 name. The entry is hashed via just the mangled name. */
706 create_demangled_names_hash (struct objfile
*objfile
)
708 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
709 The hash table code will round this up to the next prime number.
710 Choosing a much larger table size wastes memory, and saves only about
711 1% in symbol reading. */
713 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
714 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
715 NULL
, xcalloc
, xfree
);
718 /* Try to determine the demangled name for a symbol, based on the
719 language of that symbol. If the language is set to language_auto,
720 it will attempt to find any demangling algorithm that works and
721 then set the language appropriately. The returned name is allocated
722 by the demangler and should be xfree'd. */
725 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
728 char *demangled
= NULL
;
732 if (gsymbol
->language
== language_unknown
)
733 gsymbol
->language
= language_auto
;
735 if (gsymbol
->language
!= language_auto
)
737 const struct language_defn
*lang
= language_def (gsymbol
->language
);
739 language_sniff_from_mangled_name (lang
, mangled
, &demangled
);
743 for (i
= language_unknown
; i
< nr_languages
; ++i
)
745 enum language l
= (enum language
) i
;
746 const struct language_defn
*lang
= language_def (l
);
748 if (language_sniff_from_mangled_name (lang
, mangled
, &demangled
))
750 gsymbol
->language
= l
;
758 /* Set both the mangled and demangled (if any) names for GSYMBOL based
759 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
760 objfile's obstack; but if COPY_NAME is 0 and if NAME is
761 NUL-terminated, then this function assumes that NAME is already
762 correctly saved (either permanently or with a lifetime tied to the
763 objfile), and it will not be copied.
765 The hash table corresponding to OBJFILE is used, and the memory
766 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
767 so the pointer can be discarded after calling this function. */
770 symbol_set_names (struct general_symbol_info
*gsymbol
,
771 const char *linkage_name
, int len
, int copy_name
,
772 struct objfile
*objfile
)
774 struct demangled_name_entry
**slot
;
775 /* A 0-terminated copy of the linkage name. */
776 const char *linkage_name_copy
;
777 struct demangled_name_entry entry
;
778 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
780 if (gsymbol
->language
== language_ada
)
782 /* In Ada, we do the symbol lookups using the mangled name, so
783 we can save some space by not storing the demangled name. */
785 gsymbol
->name
= linkage_name
;
788 char *name
= (char *) obstack_alloc (&per_bfd
->storage_obstack
,
791 memcpy (name
, linkage_name
, len
);
793 gsymbol
->name
= name
;
795 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
800 if (per_bfd
->demangled_names_hash
== NULL
)
801 create_demangled_names_hash (objfile
);
803 if (linkage_name
[len
] != '\0')
807 alloc_name
= (char *) alloca (len
+ 1);
808 memcpy (alloc_name
, linkage_name
, len
);
809 alloc_name
[len
] = '\0';
811 linkage_name_copy
= alloc_name
;
814 linkage_name_copy
= linkage_name
;
816 entry
.mangled
= linkage_name_copy
;
817 slot
= ((struct demangled_name_entry
**)
818 htab_find_slot (per_bfd
->demangled_names_hash
,
821 /* If this name is not in the hash table, add it. */
823 /* A C version of the symbol may have already snuck into the table.
824 This happens to, e.g., main.init (__go_init_main). Cope. */
825 || (gsymbol
->language
== language_go
826 && (*slot
)->demangled
[0] == '\0'))
828 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
830 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
832 /* Suppose we have demangled_name==NULL, copy_name==0, and
833 linkage_name_copy==linkage_name. In this case, we already have the
834 mangled name saved, and we don't have a demangled name. So,
835 you might think we could save a little space by not recording
836 this in the hash table at all.
838 It turns out that it is actually important to still save such
839 an entry in the hash table, because storing this name gives
840 us better bcache hit rates for partial symbols. */
841 if (!copy_name
&& linkage_name_copy
== linkage_name
)
844 = ((struct demangled_name_entry
*)
845 obstack_alloc (&per_bfd
->storage_obstack
,
846 offsetof (struct demangled_name_entry
, demangled
)
847 + demangled_len
+ 1));
848 (*slot
)->mangled
= linkage_name
;
854 /* If we must copy the mangled name, put it directly after
855 the demangled name so we can have a single
858 = ((struct demangled_name_entry
*)
859 obstack_alloc (&per_bfd
->storage_obstack
,
860 offsetof (struct demangled_name_entry
, demangled
)
861 + len
+ demangled_len
+ 2));
862 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
863 strcpy (mangled_ptr
, linkage_name_copy
);
864 (*slot
)->mangled
= mangled_ptr
;
867 if (demangled_name
!= NULL
)
869 strcpy ((*slot
)->demangled
, demangled_name
);
870 xfree (demangled_name
);
873 (*slot
)->demangled
[0] = '\0';
876 gsymbol
->name
= (*slot
)->mangled
;
877 if ((*slot
)->demangled
[0] != '\0')
878 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
879 &per_bfd
->storage_obstack
);
881 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
884 /* Return the source code name of a symbol. In languages where
885 demangling is necessary, this is the demangled name. */
888 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
890 switch (gsymbol
->language
)
896 case language_fortran
:
897 if (symbol_get_demangled_name (gsymbol
) != NULL
)
898 return symbol_get_demangled_name (gsymbol
);
901 return ada_decode_symbol (gsymbol
);
905 return gsymbol
->name
;
908 /* Return the demangled name for a symbol based on the language for
909 that symbol. If no demangled name exists, return NULL. */
912 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
914 const char *dem_name
= NULL
;
916 switch (gsymbol
->language
)
922 case language_fortran
:
923 dem_name
= symbol_get_demangled_name (gsymbol
);
926 dem_name
= ada_decode_symbol (gsymbol
);
934 /* Return the search name of a symbol---generally the demangled or
935 linkage name of the symbol, depending on how it will be searched for.
936 If there is no distinct demangled name, then returns the same value
937 (same pointer) as SYMBOL_LINKAGE_NAME. */
940 symbol_search_name (const struct general_symbol_info
*gsymbol
)
942 if (gsymbol
->language
== language_ada
)
943 return gsymbol
->name
;
945 return symbol_natural_name (gsymbol
);
948 /* Initialize the structure fields to zero values. */
951 init_sal (struct symtab_and_line
*sal
)
953 memset (sal
, 0, sizeof (*sal
));
957 /* Return 1 if the two sections are the same, or if they could
958 plausibly be copies of each other, one in an original object
959 file and another in a separated debug file. */
962 matching_obj_sections (struct obj_section
*obj_first
,
963 struct obj_section
*obj_second
)
965 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
966 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
969 /* If they're the same section, then they match. */
973 /* If either is NULL, give up. */
974 if (first
== NULL
|| second
== NULL
)
977 /* This doesn't apply to absolute symbols. */
978 if (first
->owner
== NULL
|| second
->owner
== NULL
)
981 /* If they're in the same object file, they must be different sections. */
982 if (first
->owner
== second
->owner
)
985 /* Check whether the two sections are potentially corresponding. They must
986 have the same size, address, and name. We can't compare section indexes,
987 which would be more reliable, because some sections may have been
989 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
992 /* In-memory addresses may start at a different offset, relativize them. */
993 if (bfd_get_section_vma (first
->owner
, first
)
994 - bfd_get_start_address (first
->owner
)
995 != bfd_get_section_vma (second
->owner
, second
)
996 - bfd_get_start_address (second
->owner
))
999 if (bfd_get_section_name (first
->owner
, first
) == NULL
1000 || bfd_get_section_name (second
->owner
, second
) == NULL
1001 || strcmp (bfd_get_section_name (first
->owner
, first
),
1002 bfd_get_section_name (second
->owner
, second
)) != 0)
1005 /* Otherwise check that they are in corresponding objfiles. */
1008 if (obj
->obfd
== first
->owner
)
1010 gdb_assert (obj
!= NULL
);
1012 if (obj
->separate_debug_objfile
!= NULL
1013 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1015 if (obj
->separate_debug_objfile_backlink
!= NULL
1016 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1025 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1027 struct objfile
*objfile
;
1028 struct bound_minimal_symbol msymbol
;
1030 /* If we know that this is not a text address, return failure. This is
1031 necessary because we loop based on texthigh and textlow, which do
1032 not include the data ranges. */
1033 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1035 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1036 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1037 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1038 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1039 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1042 ALL_OBJFILES (objfile
)
1044 struct compunit_symtab
*cust
= NULL
;
1047 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1054 /* Hash function for the symbol cache. */
1057 hash_symbol_entry (const struct objfile
*objfile_context
,
1058 const char *name
, domain_enum domain
)
1060 unsigned int hash
= (uintptr_t) objfile_context
;
1063 hash
+= htab_hash_string (name
);
1065 /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
1066 to map to the same slot. */
1067 if (domain
== STRUCT_DOMAIN
)
1068 hash
+= VAR_DOMAIN
* 7;
1075 /* Equality function for the symbol cache. */
1078 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1079 const struct objfile
*objfile_context
,
1080 const char *name
, domain_enum domain
)
1082 const char *slot_name
;
1083 domain_enum slot_domain
;
1085 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1088 if (slot
->objfile_context
!= objfile_context
)
1091 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1093 slot_name
= slot
->value
.not_found
.name
;
1094 slot_domain
= slot
->value
.not_found
.domain
;
1098 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
.symbol
);
1099 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
.symbol
);
1102 /* NULL names match. */
1103 if (slot_name
== NULL
&& name
== NULL
)
1105 /* But there's no point in calling symbol_matches_domain in the
1106 SYMBOL_SLOT_FOUND case. */
1107 if (slot_domain
!= domain
)
1110 else if (slot_name
!= NULL
&& name
!= NULL
)
1112 /* It's important that we use the same comparison that was done the
1113 first time through. If the slot records a found symbol, then this
1114 means using strcmp_iw on SYMBOL_SEARCH_NAME. See dictionary.c.
1115 It also means using symbol_matches_domain for found symbols.
1118 If the slot records a not-found symbol, then require a precise match.
1119 We could still be lax with whitespace like strcmp_iw though. */
1121 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1123 if (strcmp (slot_name
, name
) != 0)
1125 if (slot_domain
!= domain
)
1130 struct symbol
*sym
= slot
->value
.found
.symbol
;
1132 if (strcmp_iw (slot_name
, name
) != 0)
1134 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1135 slot_domain
, domain
))
1141 /* Only one name is NULL. */
1148 /* Given a cache of size SIZE, return the size of the struct (with variable
1149 length array) in bytes. */
1152 symbol_cache_byte_size (unsigned int size
)
1154 return (sizeof (struct block_symbol_cache
)
1155 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1161 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1163 /* If there's no change in size, don't do anything.
1164 All caches have the same size, so we can just compare with the size
1165 of the global symbols cache. */
1166 if ((cache
->global_symbols
!= NULL
1167 && cache
->global_symbols
->size
== new_size
)
1168 || (cache
->global_symbols
== NULL
1172 xfree (cache
->global_symbols
);
1173 xfree (cache
->static_symbols
);
1177 cache
->global_symbols
= NULL
;
1178 cache
->static_symbols
= NULL
;
1182 size_t total_size
= symbol_cache_byte_size (new_size
);
1184 cache
->global_symbols
1185 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1186 cache
->static_symbols
1187 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1188 cache
->global_symbols
->size
= new_size
;
1189 cache
->static_symbols
->size
= new_size
;
1193 /* Make a symbol cache of size SIZE. */
1195 static struct symbol_cache
*
1196 make_symbol_cache (unsigned int size
)
1198 struct symbol_cache
*cache
;
1200 cache
= XCNEW (struct symbol_cache
);
1201 resize_symbol_cache (cache
, symbol_cache_size
);
1205 /* Free the space used by CACHE. */
1208 free_symbol_cache (struct symbol_cache
*cache
)
1210 xfree (cache
->global_symbols
);
1211 xfree (cache
->static_symbols
);
1215 /* Return the symbol cache of PSPACE.
1216 Create one if it doesn't exist yet. */
1218 static struct symbol_cache
*
1219 get_symbol_cache (struct program_space
*pspace
)
1221 struct symbol_cache
*cache
1222 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1226 cache
= make_symbol_cache (symbol_cache_size
);
1227 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1233 /* Delete the symbol cache of PSPACE.
1234 Called when PSPACE is destroyed. */
1237 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1239 struct symbol_cache
*cache
= (struct symbol_cache
*) data
;
1241 free_symbol_cache (cache
);
1244 /* Set the size of the symbol cache in all program spaces. */
1247 set_symbol_cache_size (unsigned int new_size
)
1249 struct program_space
*pspace
;
1251 ALL_PSPACES (pspace
)
1253 struct symbol_cache
*cache
1254 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1256 /* The pspace could have been created but not have a cache yet. */
1258 resize_symbol_cache (cache
, new_size
);
1262 /* Called when symbol-cache-size is set. */
1265 set_symbol_cache_size_handler (char *args
, int from_tty
,
1266 struct cmd_list_element
*c
)
1268 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1270 /* Restore the previous value.
1271 This is the value the "show" command prints. */
1272 new_symbol_cache_size
= symbol_cache_size
;
1274 error (_("Symbol cache size is too large, max is %u."),
1275 MAX_SYMBOL_CACHE_SIZE
);
1277 symbol_cache_size
= new_symbol_cache_size
;
1279 set_symbol_cache_size (symbol_cache_size
);
1282 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1283 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1284 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1285 failed (and thus this one will too), or NULL if the symbol is not present
1287 If the symbol is not present in the cache, then *BSC_PTR and *SLOT_PTR are
1288 set to the cache and slot of the symbol to save the result of a full lookup
1291 static struct block_symbol
1292 symbol_cache_lookup (struct symbol_cache
*cache
,
1293 struct objfile
*objfile_context
, int block
,
1294 const char *name
, domain_enum domain
,
1295 struct block_symbol_cache
**bsc_ptr
,
1296 struct symbol_cache_slot
**slot_ptr
)
1298 struct block_symbol_cache
*bsc
;
1300 struct symbol_cache_slot
*slot
;
1302 if (block
== GLOBAL_BLOCK
)
1303 bsc
= cache
->global_symbols
;
1305 bsc
= cache
->static_symbols
;
1310 return (struct block_symbol
) {NULL
, NULL
};
1313 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1314 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1316 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1318 if (symbol_lookup_debug
)
1319 fprintf_unfiltered (gdb_stdlog
,
1320 "%s block symbol cache hit%s for %s, %s\n",
1321 block
== GLOBAL_BLOCK
? "Global" : "Static",
1322 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1323 ? " (not found)" : "",
1324 name
, domain_name (domain
));
1326 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1327 return SYMBOL_LOOKUP_FAILED
;
1328 return slot
->value
.found
;
1331 /* Symbol is not present in the cache. */
1336 if (symbol_lookup_debug
)
1338 fprintf_unfiltered (gdb_stdlog
,
1339 "%s block symbol cache miss for %s, %s\n",
1340 block
== GLOBAL_BLOCK
? "Global" : "Static",
1341 name
, domain_name (domain
));
1344 return (struct block_symbol
) {NULL
, NULL
};
1347 /* Clear out SLOT. */
1350 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1352 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1353 xfree (slot
->value
.not_found
.name
);
1354 slot
->state
= SYMBOL_SLOT_UNUSED
;
1357 /* Mark SYMBOL as found in SLOT.
1358 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1359 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1360 necessarily the objfile the symbol was found in. */
1363 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1364 struct symbol_cache_slot
*slot
,
1365 struct objfile
*objfile_context
,
1366 struct symbol
*symbol
,
1367 const struct block
*block
)
1371 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1374 symbol_cache_clear_slot (slot
);
1376 slot
->state
= SYMBOL_SLOT_FOUND
;
1377 slot
->objfile_context
= objfile_context
;
1378 slot
->value
.found
.symbol
= symbol
;
1379 slot
->value
.found
.block
= block
;
1382 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1383 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1384 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1387 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1388 struct symbol_cache_slot
*slot
,
1389 struct objfile
*objfile_context
,
1390 const char *name
, domain_enum domain
)
1394 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1397 symbol_cache_clear_slot (slot
);
1399 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1400 slot
->objfile_context
= objfile_context
;
1401 slot
->value
.not_found
.name
= xstrdup (name
);
1402 slot
->value
.not_found
.domain
= domain
;
1405 /* Flush the symbol cache of PSPACE. */
1408 symbol_cache_flush (struct program_space
*pspace
)
1410 struct symbol_cache
*cache
1411 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1416 if (cache
->global_symbols
== NULL
)
1418 gdb_assert (symbol_cache_size
== 0);
1419 gdb_assert (cache
->static_symbols
== NULL
);
1423 /* If the cache is untouched since the last flush, early exit.
1424 This is important for performance during the startup of a program linked
1425 with 100s (or 1000s) of shared libraries. */
1426 if (cache
->global_symbols
->misses
== 0
1427 && cache
->static_symbols
->misses
== 0)
1430 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1431 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1433 for (pass
= 0; pass
< 2; ++pass
)
1435 struct block_symbol_cache
*bsc
1436 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1439 for (i
= 0; i
< bsc
->size
; ++i
)
1440 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1443 cache
->global_symbols
->hits
= 0;
1444 cache
->global_symbols
->misses
= 0;
1445 cache
->global_symbols
->collisions
= 0;
1446 cache
->static_symbols
->hits
= 0;
1447 cache
->static_symbols
->misses
= 0;
1448 cache
->static_symbols
->collisions
= 0;
1454 symbol_cache_dump (const struct symbol_cache
*cache
)
1458 if (cache
->global_symbols
== NULL
)
1460 printf_filtered (" <disabled>\n");
1464 for (pass
= 0; pass
< 2; ++pass
)
1466 const struct block_symbol_cache
*bsc
1467 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1471 printf_filtered ("Global symbols:\n");
1473 printf_filtered ("Static symbols:\n");
1475 for (i
= 0; i
< bsc
->size
; ++i
)
1477 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1481 switch (slot
->state
)
1483 case SYMBOL_SLOT_UNUSED
:
1485 case SYMBOL_SLOT_NOT_FOUND
:
1486 printf_filtered (" [%4u] = %s, %s %s (not found)\n", i
,
1487 host_address_to_string (slot
->objfile_context
),
1488 slot
->value
.not_found
.name
,
1489 domain_name (slot
->value
.not_found
.domain
));
1491 case SYMBOL_SLOT_FOUND
:
1493 struct symbol
*found
= slot
->value
.found
.symbol
;
1494 const struct objfile
*context
= slot
->objfile_context
;
1496 printf_filtered (" [%4u] = %s, %s %s\n", i
,
1497 host_address_to_string (context
),
1498 SYMBOL_PRINT_NAME (found
),
1499 domain_name (SYMBOL_DOMAIN (found
)));
1507 /* The "mt print symbol-cache" command. */
1510 maintenance_print_symbol_cache (char *args
, int from_tty
)
1512 struct program_space
*pspace
;
1514 ALL_PSPACES (pspace
)
1516 struct symbol_cache
*cache
;
1518 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1520 pspace
->symfile_object_file
!= NULL
1521 ? objfile_name (pspace
->symfile_object_file
)
1522 : "(no object file)");
1524 /* If the cache hasn't been created yet, avoid creating one. */
1526 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1528 printf_filtered (" <empty>\n");
1530 symbol_cache_dump (cache
);
1534 /* The "mt flush-symbol-cache" command. */
1537 maintenance_flush_symbol_cache (char *args
, int from_tty
)
1539 struct program_space
*pspace
;
1541 ALL_PSPACES (pspace
)
1543 symbol_cache_flush (pspace
);
1547 /* Print usage statistics of CACHE. */
1550 symbol_cache_stats (struct symbol_cache
*cache
)
1554 if (cache
->global_symbols
== NULL
)
1556 printf_filtered (" <disabled>\n");
1560 for (pass
= 0; pass
< 2; ++pass
)
1562 const struct block_symbol_cache
*bsc
1563 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1568 printf_filtered ("Global block cache stats:\n");
1570 printf_filtered ("Static block cache stats:\n");
1572 printf_filtered (" size: %u\n", bsc
->size
);
1573 printf_filtered (" hits: %u\n", bsc
->hits
);
1574 printf_filtered (" misses: %u\n", bsc
->misses
);
1575 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1579 /* The "mt print symbol-cache-statistics" command. */
1582 maintenance_print_symbol_cache_statistics (char *args
, int from_tty
)
1584 struct program_space
*pspace
;
1586 ALL_PSPACES (pspace
)
1588 struct symbol_cache
*cache
;
1590 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1592 pspace
->symfile_object_file
!= NULL
1593 ? objfile_name (pspace
->symfile_object_file
)
1594 : "(no object file)");
1596 /* If the cache hasn't been created yet, avoid creating one. */
1598 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1600 printf_filtered (" empty, no stats available\n");
1602 symbol_cache_stats (cache
);
1606 /* This module's 'new_objfile' observer. */
1609 symtab_new_objfile_observer (struct objfile
*objfile
)
1611 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1612 symbol_cache_flush (current_program_space
);
1615 /* This module's 'free_objfile' observer. */
1618 symtab_free_objfile_observer (struct objfile
*objfile
)
1620 symbol_cache_flush (objfile
->pspace
);
1623 /* Debug symbols usually don't have section information. We need to dig that
1624 out of the minimal symbols and stash that in the debug symbol. */
1627 fixup_section (struct general_symbol_info
*ginfo
,
1628 CORE_ADDR addr
, struct objfile
*objfile
)
1630 struct minimal_symbol
*msym
;
1632 /* First, check whether a minimal symbol with the same name exists
1633 and points to the same address. The address check is required
1634 e.g. on PowerPC64, where the minimal symbol for a function will
1635 point to the function descriptor, while the debug symbol will
1636 point to the actual function code. */
1637 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1639 ginfo
->section
= MSYMBOL_SECTION (msym
);
1642 /* Static, function-local variables do appear in the linker
1643 (minimal) symbols, but are frequently given names that won't
1644 be found via lookup_minimal_symbol(). E.g., it has been
1645 observed in frv-uclinux (ELF) executables that a static,
1646 function-local variable named "foo" might appear in the
1647 linker symbols as "foo.6" or "foo.3". Thus, there is no
1648 point in attempting to extend the lookup-by-name mechanism to
1649 handle this case due to the fact that there can be multiple
1652 So, instead, search the section table when lookup by name has
1653 failed. The ``addr'' and ``endaddr'' fields may have already
1654 been relocated. If so, the relocation offset (i.e. the
1655 ANOFFSET value) needs to be subtracted from these values when
1656 performing the comparison. We unconditionally subtract it,
1657 because, when no relocation has been performed, the ANOFFSET
1658 value will simply be zero.
1660 The address of the symbol whose section we're fixing up HAS
1661 NOT BEEN adjusted (relocated) yet. It can't have been since
1662 the section isn't yet known and knowing the section is
1663 necessary in order to add the correct relocation value. In
1664 other words, we wouldn't even be in this function (attempting
1665 to compute the section) if it were already known.
1667 Note that it is possible to search the minimal symbols
1668 (subtracting the relocation value if necessary) to find the
1669 matching minimal symbol, but this is overkill and much less
1670 efficient. It is not necessary to find the matching minimal
1671 symbol, only its section.
1673 Note that this technique (of doing a section table search)
1674 can fail when unrelocated section addresses overlap. For
1675 this reason, we still attempt a lookup by name prior to doing
1676 a search of the section table. */
1678 struct obj_section
*s
;
1681 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1683 int idx
= s
- objfile
->sections
;
1684 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1689 if (obj_section_addr (s
) - offset
<= addr
1690 && addr
< obj_section_endaddr (s
) - offset
)
1692 ginfo
->section
= idx
;
1697 /* If we didn't find the section, assume it is in the first
1698 section. If there is no allocated section, then it hardly
1699 matters what we pick, so just pick zero. */
1703 ginfo
->section
= fallback
;
1708 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1715 if (!SYMBOL_OBJFILE_OWNED (sym
))
1718 /* We either have an OBJFILE, or we can get at it from the sym's
1719 symtab. Anything else is a bug. */
1720 gdb_assert (objfile
|| symbol_symtab (sym
));
1722 if (objfile
== NULL
)
1723 objfile
= symbol_objfile (sym
);
1725 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1728 /* We should have an objfile by now. */
1729 gdb_assert (objfile
);
1731 switch (SYMBOL_CLASS (sym
))
1735 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1738 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1742 /* Nothing else will be listed in the minsyms -- no use looking
1747 fixup_section (&sym
->ginfo
, addr
, objfile
);
1752 /* Compute the demangled form of NAME as used by the various symbol
1753 lookup functions. The result can either be the input NAME
1754 directly, or a pointer to a buffer owned by the STORAGE object.
1756 For Ada, this function just returns NAME, unmodified.
1757 Normally, Ada symbol lookups are performed using the encoded name
1758 rather than the demangled name, and so it might seem to make sense
1759 for this function to return an encoded version of NAME.
1760 Unfortunately, we cannot do this, because this function is used in
1761 circumstances where it is not appropriate to try to encode NAME.
1762 For instance, when displaying the frame info, we demangle the name
1763 of each parameter, and then perform a symbol lookup inside our
1764 function using that demangled name. In Ada, certain functions
1765 have internally-generated parameters whose name contain uppercase
1766 characters. Encoding those name would result in those uppercase
1767 characters to become lowercase, and thus cause the symbol lookup
1771 demangle_for_lookup (const char *name
, enum language lang
,
1772 demangle_result_storage
&storage
)
1774 /* If we are using C++, D, or Go, demangle the name before doing a
1775 lookup, so we can always binary search. */
1776 if (lang
== language_cplus
)
1778 char *demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1779 if (demangled_name
!= NULL
)
1780 return storage
.set_malloc_ptr (demangled_name
);
1782 /* If we were given a non-mangled name, canonicalize it
1783 according to the language (so far only for C++). */
1784 std::string canon
= cp_canonicalize_string (name
);
1785 if (!canon
.empty ())
1786 return storage
.swap_string (canon
);
1788 else if (lang
== language_d
)
1790 char *demangled_name
= d_demangle (name
, 0);
1791 if (demangled_name
!= NULL
)
1792 return storage
.set_malloc_ptr (demangled_name
);
1794 else if (lang
== language_go
)
1796 char *demangled_name
= go_demangle (name
, 0);
1797 if (demangled_name
!= NULL
)
1798 return storage
.set_malloc_ptr (demangled_name
);
1806 This function (or rather its subordinates) have a bunch of loops and
1807 it would seem to be attractive to put in some QUIT's (though I'm not really
1808 sure whether it can run long enough to be really important). But there
1809 are a few calls for which it would appear to be bad news to quit
1810 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1811 that there is C++ code below which can error(), but that probably
1812 doesn't affect these calls since they are looking for a known
1813 variable and thus can probably assume it will never hit the C++
1817 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1818 const domain_enum domain
, enum language lang
,
1819 struct field_of_this_result
*is_a_field_of_this
)
1821 demangle_result_storage storage
;
1822 const char *modified_name
= demangle_for_lookup (name
, lang
, storage
);
1824 return lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1825 is_a_field_of_this
);
1831 lookup_symbol (const char *name
, const struct block
*block
,
1833 struct field_of_this_result
*is_a_field_of_this
)
1835 return lookup_symbol_in_language (name
, block
, domain
,
1836 current_language
->la_language
,
1837 is_a_field_of_this
);
1843 lookup_language_this (const struct language_defn
*lang
,
1844 const struct block
*block
)
1846 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1847 return (struct block_symbol
) {NULL
, NULL
};
1849 if (symbol_lookup_debug
> 1)
1851 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1853 fprintf_unfiltered (gdb_stdlog
,
1854 "lookup_language_this (%s, %s (objfile %s))",
1855 lang
->la_name
, host_address_to_string (block
),
1856 objfile_debug_name (objfile
));
1863 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1866 if (symbol_lookup_debug
> 1)
1868 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1869 SYMBOL_PRINT_NAME (sym
),
1870 host_address_to_string (sym
),
1871 host_address_to_string (block
));
1873 return (struct block_symbol
) {sym
, block
};
1875 if (BLOCK_FUNCTION (block
))
1877 block
= BLOCK_SUPERBLOCK (block
);
1880 if (symbol_lookup_debug
> 1)
1881 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
1882 return (struct block_symbol
) {NULL
, NULL
};
1885 /* Given TYPE, a structure/union,
1886 return 1 if the component named NAME from the ultimate target
1887 structure/union is defined, otherwise, return 0. */
1890 check_field (struct type
*type
, const char *name
,
1891 struct field_of_this_result
*is_a_field_of_this
)
1895 /* The type may be a stub. */
1896 type
= check_typedef (type
);
1898 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1900 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1902 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1904 is_a_field_of_this
->type
= type
;
1905 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1910 /* C++: If it was not found as a data field, then try to return it
1911 as a pointer to a method. */
1913 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1915 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1917 is_a_field_of_this
->type
= type
;
1918 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1923 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1924 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
1930 /* Behave like lookup_symbol except that NAME is the natural name
1931 (e.g., demangled name) of the symbol that we're looking for. */
1933 static struct block_symbol
1934 lookup_symbol_aux (const char *name
, const struct block
*block
,
1935 const domain_enum domain
, enum language language
,
1936 struct field_of_this_result
*is_a_field_of_this
)
1938 struct block_symbol result
;
1939 const struct language_defn
*langdef
;
1941 if (symbol_lookup_debug
)
1943 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1945 fprintf_unfiltered (gdb_stdlog
,
1946 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
1947 name
, host_address_to_string (block
),
1949 ? objfile_debug_name (objfile
) : "NULL",
1950 domain_name (domain
), language_str (language
));
1953 /* Make sure we do something sensible with is_a_field_of_this, since
1954 the callers that set this parameter to some non-null value will
1955 certainly use it later. If we don't set it, the contents of
1956 is_a_field_of_this are undefined. */
1957 if (is_a_field_of_this
!= NULL
)
1958 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
1960 /* Search specified block and its superiors. Don't search
1961 STATIC_BLOCK or GLOBAL_BLOCK. */
1963 result
= lookup_local_symbol (name
, block
, domain
, language
);
1964 if (result
.symbol
!= NULL
)
1966 if (symbol_lookup_debug
)
1968 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
1969 host_address_to_string (result
.symbol
));
1974 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1975 check to see if NAME is a field of `this'. */
1977 langdef
= language_def (language
);
1979 /* Don't do this check if we are searching for a struct. It will
1980 not be found by check_field, but will be found by other
1982 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
1984 result
= lookup_language_this (langdef
, block
);
1988 struct type
*t
= result
.symbol
->type
;
1990 /* I'm not really sure that type of this can ever
1991 be typedefed; just be safe. */
1992 t
= check_typedef (t
);
1993 if (TYPE_CODE (t
) == TYPE_CODE_PTR
|| TYPE_IS_REFERENCE (t
))
1994 t
= TYPE_TARGET_TYPE (t
);
1996 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1997 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1998 error (_("Internal error: `%s' is not an aggregate"),
1999 langdef
->la_name_of_this
);
2001 if (check_field (t
, name
, is_a_field_of_this
))
2003 if (symbol_lookup_debug
)
2005 fprintf_unfiltered (gdb_stdlog
,
2006 "lookup_symbol_aux (...) = NULL\n");
2008 return (struct block_symbol
) {NULL
, NULL
};
2013 /* Now do whatever is appropriate for LANGUAGE to look
2014 up static and global variables. */
2016 result
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2017 if (result
.symbol
!= NULL
)
2019 if (symbol_lookup_debug
)
2021 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2022 host_address_to_string (result
.symbol
));
2027 /* Now search all static file-level symbols. Not strictly correct,
2028 but more useful than an error. */
2030 result
= lookup_static_symbol (name
, domain
);
2031 if (symbol_lookup_debug
)
2033 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2034 result
.symbol
!= NULL
2035 ? host_address_to_string (result
.symbol
)
2041 /* Check to see if the symbol is defined in BLOCK or its superiors.
2042 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2044 static struct block_symbol
2045 lookup_local_symbol (const char *name
, const struct block
*block
,
2046 const domain_enum domain
,
2047 enum language language
)
2050 const struct block
*static_block
= block_static_block (block
);
2051 const char *scope
= block_scope (block
);
2053 /* Check if either no block is specified or it's a global block. */
2055 if (static_block
== NULL
)
2056 return (struct block_symbol
) {NULL
, NULL
};
2058 while (block
!= static_block
)
2060 sym
= lookup_symbol_in_block (name
, block
, domain
);
2062 return (struct block_symbol
) {sym
, block
};
2064 if (language
== language_cplus
|| language
== language_fortran
)
2066 struct block_symbol sym
2067 = cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2070 if (sym
.symbol
!= NULL
)
2074 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2076 block
= BLOCK_SUPERBLOCK (block
);
2079 /* We've reached the end of the function without finding a result. */
2081 return (struct block_symbol
) {NULL
, NULL
};
2087 lookup_objfile_from_block (const struct block
*block
)
2089 struct objfile
*obj
;
2090 struct compunit_symtab
*cust
;
2095 block
= block_global_block (block
);
2096 /* Look through all blockvectors. */
2097 ALL_COMPUNITS (obj
, cust
)
2098 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2101 if (obj
->separate_debug_objfile_backlink
)
2102 obj
= obj
->separate_debug_objfile_backlink
;
2113 lookup_symbol_in_block (const char *name
, const struct block
*block
,
2114 const domain_enum domain
)
2118 if (symbol_lookup_debug
> 1)
2120 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2122 fprintf_unfiltered (gdb_stdlog
,
2123 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2124 name
, host_address_to_string (block
),
2125 objfile_debug_name (objfile
),
2126 domain_name (domain
));
2129 sym
= block_lookup_symbol (block
, name
, domain
);
2132 if (symbol_lookup_debug
> 1)
2134 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2135 host_address_to_string (sym
));
2137 return fixup_symbol_section (sym
, NULL
);
2140 if (symbol_lookup_debug
> 1)
2141 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2148 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2150 const domain_enum domain
)
2152 struct objfile
*objfile
;
2154 for (objfile
= main_objfile
;
2156 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2158 struct block_symbol result
2159 = lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
, name
, domain
);
2161 if (result
.symbol
!= NULL
)
2165 return (struct block_symbol
) {NULL
, NULL
};
2168 /* Check to see if the symbol is defined in one of the OBJFILE's
2169 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2170 depending on whether or not we want to search global symbols or
2173 static struct block_symbol
2174 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2175 const char *name
, const domain_enum domain
)
2177 struct compunit_symtab
*cust
;
2179 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2181 if (symbol_lookup_debug
> 1)
2183 fprintf_unfiltered (gdb_stdlog
,
2184 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2185 objfile_debug_name (objfile
),
2186 block_index
== GLOBAL_BLOCK
2187 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2188 name
, domain_name (domain
));
2191 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2193 const struct blockvector
*bv
;
2194 const struct block
*block
;
2195 struct block_symbol result
;
2197 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2198 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2199 result
.symbol
= block_lookup_symbol_primary (block
, name
, domain
);
2200 result
.block
= block
;
2201 if (result
.symbol
!= NULL
)
2203 if (symbol_lookup_debug
> 1)
2205 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2206 host_address_to_string (result
.symbol
),
2207 host_address_to_string (block
));
2209 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2215 if (symbol_lookup_debug
> 1)
2216 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2217 return (struct block_symbol
) {NULL
, NULL
};
2220 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2221 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2222 and all associated separate debug objfiles.
2224 Normally we only look in OBJFILE, and not any separate debug objfiles
2225 because the outer loop will cause them to be searched too. This case is
2226 different. Here we're called from search_symbols where it will only
2227 call us for the the objfile that contains a matching minsym. */
2229 static struct block_symbol
2230 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2231 const char *linkage_name
,
2234 enum language lang
= current_language
->la_language
;
2235 struct objfile
*main_objfile
, *cur_objfile
;
2237 demangle_result_storage storage
;
2238 const char *modified_name
= demangle_for_lookup (linkage_name
, lang
, storage
);
2240 if (objfile
->separate_debug_objfile_backlink
)
2241 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2243 main_objfile
= objfile
;
2245 for (cur_objfile
= main_objfile
;
2247 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2249 struct block_symbol result
;
2251 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2252 modified_name
, domain
);
2253 if (result
.symbol
== NULL
)
2254 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2255 modified_name
, domain
);
2256 if (result
.symbol
!= NULL
)
2260 return (struct block_symbol
) {NULL
, NULL
};
2263 /* A helper function that throws an exception when a symbol was found
2264 in a psymtab but not in a symtab. */
2266 static void ATTRIBUTE_NORETURN
2267 error_in_psymtab_expansion (int block_index
, const char *name
,
2268 struct compunit_symtab
*cust
)
2271 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2272 %s may be an inlined function, or may be a template function\n \
2273 (if a template, try specifying an instantiation: %s<type>)."),
2274 block_index
== GLOBAL_BLOCK
? "global" : "static",
2276 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2280 /* A helper function for various lookup routines that interfaces with
2281 the "quick" symbol table functions. */
2283 static struct block_symbol
2284 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2285 const char *name
, const domain_enum domain
)
2287 struct compunit_symtab
*cust
;
2288 const struct blockvector
*bv
;
2289 const struct block
*block
;
2290 struct block_symbol result
;
2293 return (struct block_symbol
) {NULL
, NULL
};
2295 if (symbol_lookup_debug
> 1)
2297 fprintf_unfiltered (gdb_stdlog
,
2298 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2299 objfile_debug_name (objfile
),
2300 block_index
== GLOBAL_BLOCK
2301 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2302 name
, domain_name (domain
));
2305 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2308 if (symbol_lookup_debug
> 1)
2310 fprintf_unfiltered (gdb_stdlog
,
2311 "lookup_symbol_via_quick_fns (...) = NULL\n");
2313 return (struct block_symbol
) {NULL
, NULL
};
2316 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2317 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2318 result
.symbol
= block_lookup_symbol (block
, name
, domain
);
2319 if (result
.symbol
== NULL
)
2320 error_in_psymtab_expansion (block_index
, name
, cust
);
2322 if (symbol_lookup_debug
> 1)
2324 fprintf_unfiltered (gdb_stdlog
,
2325 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2326 host_address_to_string (result
.symbol
),
2327 host_address_to_string (block
));
2330 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2331 result
.block
= block
;
2338 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2340 const struct block
*block
,
2341 const domain_enum domain
)
2343 struct block_symbol result
;
2345 /* NOTE: carlton/2003-05-19: The comments below were written when
2346 this (or what turned into this) was part of lookup_symbol_aux;
2347 I'm much less worried about these questions now, since these
2348 decisions have turned out well, but I leave these comments here
2351 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2352 not it would be appropriate to search the current global block
2353 here as well. (That's what this code used to do before the
2354 is_a_field_of_this check was moved up.) On the one hand, it's
2355 redundant with the lookup in all objfiles search that happens
2356 next. On the other hand, if decode_line_1 is passed an argument
2357 like filename:var, then the user presumably wants 'var' to be
2358 searched for in filename. On the third hand, there shouldn't be
2359 multiple global variables all of which are named 'var', and it's
2360 not like decode_line_1 has ever restricted its search to only
2361 global variables in a single filename. All in all, only
2362 searching the static block here seems best: it's correct and it's
2365 /* NOTE: carlton/2002-12-05: There's also a possible performance
2366 issue here: if you usually search for global symbols in the
2367 current file, then it would be slightly better to search the
2368 current global block before searching all the symtabs. But there
2369 are other factors that have a much greater effect on performance
2370 than that one, so I don't think we should worry about that for
2373 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2374 the current objfile. Searching the current objfile first is useful
2375 for both matching user expectations as well as performance. */
2377 result
= lookup_symbol_in_static_block (name
, block
, domain
);
2378 if (result
.symbol
!= NULL
)
2381 /* If we didn't find a definition for a builtin type in the static block,
2382 search for it now. This is actually the right thing to do and can be
2383 a massive performance win. E.g., when debugging a program with lots of
2384 shared libraries we could search all of them only to find out the
2385 builtin type isn't defined in any of them. This is common for types
2387 if (domain
== VAR_DOMAIN
)
2389 struct gdbarch
*gdbarch
;
2392 gdbarch
= target_gdbarch ();
2394 gdbarch
= block_gdbarch (block
);
2395 result
.symbol
= language_lookup_primitive_type_as_symbol (langdef
,
2397 result
.block
= NULL
;
2398 if (result
.symbol
!= NULL
)
2402 return lookup_global_symbol (name
, block
, domain
);
2408 lookup_symbol_in_static_block (const char *name
,
2409 const struct block
*block
,
2410 const domain_enum domain
)
2412 const struct block
*static_block
= block_static_block (block
);
2415 if (static_block
== NULL
)
2416 return (struct block_symbol
) {NULL
, NULL
};
2418 if (symbol_lookup_debug
)
2420 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2422 fprintf_unfiltered (gdb_stdlog
,
2423 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2426 host_address_to_string (block
),
2427 objfile_debug_name (objfile
),
2428 domain_name (domain
));
2431 sym
= lookup_symbol_in_block (name
, static_block
, domain
);
2432 if (symbol_lookup_debug
)
2434 fprintf_unfiltered (gdb_stdlog
,
2435 "lookup_symbol_in_static_block (...) = %s\n",
2436 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2438 return (struct block_symbol
) {sym
, static_block
};
2441 /* Perform the standard symbol lookup of NAME in OBJFILE:
2442 1) First search expanded symtabs, and if not found
2443 2) Search the "quick" symtabs (partial or .gdb_index).
2444 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2446 static struct block_symbol
2447 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2448 const char *name
, const domain_enum domain
)
2450 struct block_symbol result
;
2452 if (symbol_lookup_debug
)
2454 fprintf_unfiltered (gdb_stdlog
,
2455 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2456 objfile_debug_name (objfile
),
2457 block_index
== GLOBAL_BLOCK
2458 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2459 name
, domain_name (domain
));
2462 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2464 if (result
.symbol
!= NULL
)
2466 if (symbol_lookup_debug
)
2468 fprintf_unfiltered (gdb_stdlog
,
2469 "lookup_symbol_in_objfile (...) = %s"
2471 host_address_to_string (result
.symbol
));
2476 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2478 if (symbol_lookup_debug
)
2480 fprintf_unfiltered (gdb_stdlog
,
2481 "lookup_symbol_in_objfile (...) = %s%s\n",
2482 result
.symbol
!= NULL
2483 ? host_address_to_string (result
.symbol
)
2485 result
.symbol
!= NULL
? " (via quick fns)" : "");
2493 lookup_static_symbol (const char *name
, const domain_enum domain
)
2495 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2496 struct objfile
*objfile
;
2497 struct block_symbol result
;
2498 struct block_symbol_cache
*bsc
;
2499 struct symbol_cache_slot
*slot
;
2501 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2502 NULL for OBJFILE_CONTEXT. */
2503 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2505 if (result
.symbol
!= NULL
)
2507 if (SYMBOL_LOOKUP_FAILED_P (result
))
2508 return (struct block_symbol
) {NULL
, NULL
};
2512 ALL_OBJFILES (objfile
)
2514 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2515 if (result
.symbol
!= NULL
)
2517 /* Still pass NULL for OBJFILE_CONTEXT here. */
2518 symbol_cache_mark_found (bsc
, slot
, NULL
, result
.symbol
,
2524 /* Still pass NULL for OBJFILE_CONTEXT here. */
2525 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2526 return (struct block_symbol
) {NULL
, NULL
};
2529 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2531 struct global_sym_lookup_data
2533 /* The name of the symbol we are searching for. */
2536 /* The domain to use for our search. */
2539 /* The field where the callback should store the symbol if found.
2540 It should be initialized to {NULL, NULL} before the search is started. */
2541 struct block_symbol result
;
2544 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2545 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2546 OBJFILE. The arguments for the search are passed via CB_DATA,
2547 which in reality is a pointer to struct global_sym_lookup_data. */
2550 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2553 struct global_sym_lookup_data
*data
=
2554 (struct global_sym_lookup_data
*) cb_data
;
2556 gdb_assert (data
->result
.symbol
== NULL
2557 && data
->result
.block
== NULL
);
2559 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2560 data
->name
, data
->domain
);
2562 /* If we found a match, tell the iterator to stop. Otherwise,
2564 return (data
->result
.symbol
!= NULL
);
2570 lookup_global_symbol (const char *name
,
2571 const struct block
*block
,
2572 const domain_enum domain
)
2574 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2575 struct block_symbol result
;
2576 struct objfile
*objfile
;
2577 struct global_sym_lookup_data lookup_data
;
2578 struct block_symbol_cache
*bsc
;
2579 struct symbol_cache_slot
*slot
;
2581 objfile
= lookup_objfile_from_block (block
);
2583 /* First see if we can find the symbol in the cache.
2584 This works because we use the current objfile to qualify the lookup. */
2585 result
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2587 if (result
.symbol
!= NULL
)
2589 if (SYMBOL_LOOKUP_FAILED_P (result
))
2590 return (struct block_symbol
) {NULL
, NULL
};
2594 /* Call library-specific lookup procedure. */
2595 if (objfile
!= NULL
)
2596 result
= solib_global_lookup (objfile
, name
, domain
);
2598 /* If that didn't work go a global search (of global blocks, heh). */
2599 if (result
.symbol
== NULL
)
2601 memset (&lookup_data
, 0, sizeof (lookup_data
));
2602 lookup_data
.name
= name
;
2603 lookup_data
.domain
= domain
;
2604 gdbarch_iterate_over_objfiles_in_search_order
2605 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2606 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2607 result
= lookup_data
.result
;
2610 if (result
.symbol
!= NULL
)
2611 symbol_cache_mark_found (bsc
, slot
, objfile
, result
.symbol
, result
.block
);
2613 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2619 symbol_matches_domain (enum language symbol_language
,
2620 domain_enum symbol_domain
,
2623 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2624 Similarly, any Ada type declaration implicitly defines a typedef. */
2625 if (symbol_language
== language_cplus
2626 || symbol_language
== language_d
2627 || symbol_language
== language_ada
)
2629 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2630 && symbol_domain
== STRUCT_DOMAIN
)
2633 /* For all other languages, strict match is required. */
2634 return (symbol_domain
== domain
);
2640 lookup_transparent_type (const char *name
)
2642 return current_language
->la_lookup_transparent_type (name
);
2645 /* A helper for basic_lookup_transparent_type that interfaces with the
2646 "quick" symbol table functions. */
2648 static struct type
*
2649 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2652 struct compunit_symtab
*cust
;
2653 const struct blockvector
*bv
;
2654 struct block
*block
;
2659 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2664 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2665 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2666 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2667 block_find_non_opaque_type
, NULL
);
2669 error_in_psymtab_expansion (block_index
, name
, cust
);
2670 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2671 return SYMBOL_TYPE (sym
);
2674 /* Subroutine of basic_lookup_transparent_type to simplify it.
2675 Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
2676 BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */
2678 static struct type
*
2679 basic_lookup_transparent_type_1 (struct objfile
*objfile
, int block_index
,
2682 const struct compunit_symtab
*cust
;
2683 const struct blockvector
*bv
;
2684 const struct block
*block
;
2685 const struct symbol
*sym
;
2687 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2689 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2690 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2691 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2692 block_find_non_opaque_type
, NULL
);
2695 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2696 return SYMBOL_TYPE (sym
);
2703 /* The standard implementation of lookup_transparent_type. This code
2704 was modeled on lookup_symbol -- the parts not relevant to looking
2705 up types were just left out. In particular it's assumed here that
2706 types are available in STRUCT_DOMAIN and only in file-static or
2710 basic_lookup_transparent_type (const char *name
)
2712 struct objfile
*objfile
;
2715 /* Now search all the global symbols. Do the symtab's first, then
2716 check the psymtab's. If a psymtab indicates the existence
2717 of the desired name as a global, then do psymtab-to-symtab
2718 conversion on the fly and return the found symbol. */
2720 ALL_OBJFILES (objfile
)
2722 t
= basic_lookup_transparent_type_1 (objfile
, GLOBAL_BLOCK
, name
);
2727 ALL_OBJFILES (objfile
)
2729 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2734 /* Now search the static file-level symbols.
2735 Not strictly correct, but more useful than an error.
2736 Do the symtab's first, then
2737 check the psymtab's. If a psymtab indicates the existence
2738 of the desired name as a file-level static, then do psymtab-to-symtab
2739 conversion on the fly and return the found symbol. */
2741 ALL_OBJFILES (objfile
)
2743 t
= basic_lookup_transparent_type_1 (objfile
, STATIC_BLOCK
, name
);
2748 ALL_OBJFILES (objfile
)
2750 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2755 return (struct type
*) 0;
2758 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2760 For each symbol that matches, CALLBACK is called. The symbol is
2761 passed to the callback.
2763 If CALLBACK returns false, the iteration ends. Otherwise, the
2764 search continues. */
2767 iterate_over_symbols (const struct block
*block
, const char *name
,
2768 const domain_enum domain
,
2769 gdb::function_view
<symbol_found_callback_ftype
> callback
)
2771 struct block_iterator iter
;
2774 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2776 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2777 SYMBOL_DOMAIN (sym
), domain
))
2779 if (!callback (sym
))
2785 /* Find the compunit symtab associated with PC and SECTION.
2786 This will read in debug info as necessary. */
2788 struct compunit_symtab
*
2789 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2791 struct compunit_symtab
*cust
;
2792 struct compunit_symtab
*best_cust
= NULL
;
2793 struct objfile
*objfile
;
2794 CORE_ADDR distance
= 0;
2795 struct bound_minimal_symbol msymbol
;
2797 /* If we know that this is not a text address, return failure. This is
2798 necessary because we loop based on the block's high and low code
2799 addresses, which do not include the data ranges, and because
2800 we call find_pc_sect_psymtab which has a similar restriction based
2801 on the partial_symtab's texthigh and textlow. */
2802 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2804 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2805 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2806 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2807 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2808 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2811 /* Search all symtabs for the one whose file contains our address, and which
2812 is the smallest of all the ones containing the address. This is designed
2813 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2814 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2815 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2817 This happens for native ecoff format, where code from included files
2818 gets its own symtab. The symtab for the included file should have
2819 been read in already via the dependency mechanism.
2820 It might be swifter to create several symtabs with the same name
2821 like xcoff does (I'm not sure).
2823 It also happens for objfiles that have their functions reordered.
2824 For these, the symtab we are looking for is not necessarily read in. */
2826 ALL_COMPUNITS (objfile
, cust
)
2829 const struct blockvector
*bv
;
2831 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2832 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2834 if (BLOCK_START (b
) <= pc
2835 && BLOCK_END (b
) > pc
2837 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2839 /* For an objfile that has its functions reordered,
2840 find_pc_psymtab will find the proper partial symbol table
2841 and we simply return its corresponding symtab. */
2842 /* In order to better support objfiles that contain both
2843 stabs and coff debugging info, we continue on if a psymtab
2845 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2847 struct compunit_symtab
*result
;
2850 = objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2859 struct block_iterator iter
;
2860 struct symbol
*sym
= NULL
;
2862 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2864 fixup_symbol_section (sym
, objfile
);
2865 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2870 continue; /* No symbol in this symtab matches
2873 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2878 if (best_cust
!= NULL
)
2881 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2883 ALL_OBJFILES (objfile
)
2885 struct compunit_symtab
*result
;
2889 result
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2900 /* Find the compunit symtab associated with PC.
2901 This will read in debug info as necessary.
2902 Backward compatibility, no section. */
2904 struct compunit_symtab
*
2905 find_pc_compunit_symtab (CORE_ADDR pc
)
2907 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
2911 /* Find the source file and line number for a given PC value and SECTION.
2912 Return a structure containing a symtab pointer, a line number,
2913 and a pc range for the entire source line.
2914 The value's .pc field is NOT the specified pc.
2915 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2916 use the line that ends there. Otherwise, in that case, the line
2917 that begins there is used. */
2919 /* The big complication here is that a line may start in one file, and end just
2920 before the start of another file. This usually occurs when you #include
2921 code in the middle of a subroutine. To properly find the end of a line's PC
2922 range, we must search all symtabs associated with this compilation unit, and
2923 find the one whose first PC is closer than that of the next line in this
2926 /* If it's worth the effort, we could be using a binary search. */
2928 struct symtab_and_line
2929 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2931 struct compunit_symtab
*cust
;
2932 struct symtab
*iter_s
;
2933 struct linetable
*l
;
2936 struct linetable_entry
*item
;
2937 struct symtab_and_line val
;
2938 const struct blockvector
*bv
;
2939 struct bound_minimal_symbol msymbol
;
2941 /* Info on best line seen so far, and where it starts, and its file. */
2943 struct linetable_entry
*best
= NULL
;
2944 CORE_ADDR best_end
= 0;
2945 struct symtab
*best_symtab
= 0;
2947 /* Store here the first line number
2948 of a file which contains the line at the smallest pc after PC.
2949 If we don't find a line whose range contains PC,
2950 we will use a line one less than this,
2951 with a range from the start of that file to the first line's pc. */
2952 struct linetable_entry
*alt
= NULL
;
2954 /* Info on best line seen in this file. */
2956 struct linetable_entry
*prev
;
2958 /* If this pc is not from the current frame,
2959 it is the address of the end of a call instruction.
2960 Quite likely that is the start of the following statement.
2961 But what we want is the statement containing the instruction.
2962 Fudge the pc to make sure we get that. */
2964 init_sal (&val
); /* initialize to zeroes */
2966 val
.pspace
= current_program_space
;
2968 /* It's tempting to assume that, if we can't find debugging info for
2969 any function enclosing PC, that we shouldn't search for line
2970 number info, either. However, GAS can emit line number info for
2971 assembly files --- very helpful when debugging hand-written
2972 assembly code. In such a case, we'd have no debug info for the
2973 function, but we would have line info. */
2978 /* elz: added this because this function returned the wrong
2979 information if the pc belongs to a stub (import/export)
2980 to call a shlib function. This stub would be anywhere between
2981 two functions in the target, and the line info was erroneously
2982 taken to be the one of the line before the pc. */
2984 /* RT: Further explanation:
2986 * We have stubs (trampolines) inserted between procedures.
2988 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2989 * exists in the main image.
2991 * In the minimal symbol table, we have a bunch of symbols
2992 * sorted by start address. The stubs are marked as "trampoline",
2993 * the others appear as text. E.g.:
2995 * Minimal symbol table for main image
2996 * main: code for main (text symbol)
2997 * shr1: stub (trampoline symbol)
2998 * foo: code for foo (text symbol)
3000 * Minimal symbol table for "shr1" image:
3002 * shr1: code for shr1 (text symbol)
3005 * So the code below is trying to detect if we are in the stub
3006 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3007 * and if found, do the symbolization from the real-code address
3008 * rather than the stub address.
3010 * Assumptions being made about the minimal symbol table:
3011 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3012 * if we're really in the trampoline.s If we're beyond it (say
3013 * we're in "foo" in the above example), it'll have a closer
3014 * symbol (the "foo" text symbol for example) and will not
3015 * return the trampoline.
3016 * 2. lookup_minimal_symbol_text() will find a real text symbol
3017 * corresponding to the trampoline, and whose address will
3018 * be different than the trampoline address. I put in a sanity
3019 * check for the address being the same, to avoid an
3020 * infinite recursion.
3022 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3023 if (msymbol
.minsym
!= NULL
)
3024 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3026 struct bound_minimal_symbol mfunsym
3027 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3030 if (mfunsym
.minsym
== NULL
)
3031 /* I eliminated this warning since it is coming out
3032 * in the following situation:
3033 * gdb shmain // test program with shared libraries
3034 * (gdb) break shr1 // function in shared lib
3035 * Warning: In stub for ...
3036 * In the above situation, the shared lib is not loaded yet,
3037 * so of course we can't find the real func/line info,
3038 * but the "break" still works, and the warning is annoying.
3039 * So I commented out the warning. RT */
3040 /* warning ("In stub for %s; unable to find real function/line info",
3041 SYMBOL_LINKAGE_NAME (msymbol)); */
3044 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3045 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3046 /* Avoid infinite recursion */
3047 /* See above comment about why warning is commented out. */
3048 /* warning ("In stub for %s; unable to find real function/line info",
3049 SYMBOL_LINKAGE_NAME (msymbol)); */
3053 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3057 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3060 /* If no symbol information, return previous pc. */
3067 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3069 /* Look at all the symtabs that share this blockvector.
3070 They all have the same apriori range, that we found was right;
3071 but they have different line tables. */
3073 ALL_COMPUNIT_FILETABS (cust
, iter_s
)
3075 /* Find the best line in this symtab. */
3076 l
= SYMTAB_LINETABLE (iter_s
);
3082 /* I think len can be zero if the symtab lacks line numbers
3083 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3084 I'm not sure which, and maybe it depends on the symbol
3090 item
= l
->item
; /* Get first line info. */
3092 /* Is this file's first line closer than the first lines of other files?
3093 If so, record this file, and its first line, as best alternate. */
3094 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3097 for (i
= 0; i
< len
; i
++, item
++)
3099 /* Leave prev pointing to the linetable entry for the last line
3100 that started at or before PC. */
3107 /* At this point, prev points at the line whose start addr is <= pc, and
3108 item points at the next line. If we ran off the end of the linetable
3109 (pc >= start of the last line), then prev == item. If pc < start of
3110 the first line, prev will not be set. */
3112 /* Is this file's best line closer than the best in the other files?
3113 If so, record this file, and its best line, as best so far. Don't
3114 save prev if it represents the end of a function (i.e. line number
3115 0) instead of a real line. */
3117 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3120 best_symtab
= iter_s
;
3122 /* Discard BEST_END if it's before the PC of the current BEST. */
3123 if (best_end
<= best
->pc
)
3127 /* If another line (denoted by ITEM) is in the linetable and its
3128 PC is after BEST's PC, but before the current BEST_END, then
3129 use ITEM's PC as the new best_end. */
3130 if (best
&& i
< len
&& item
->pc
> best
->pc
3131 && (best_end
== 0 || best_end
> item
->pc
))
3132 best_end
= item
->pc
;
3137 /* If we didn't find any line number info, just return zeros.
3138 We used to return alt->line - 1 here, but that could be
3139 anywhere; if we don't have line number info for this PC,
3140 don't make some up. */
3143 else if (best
->line
== 0)
3145 /* If our best fit is in a range of PC's for which no line
3146 number info is available (line number is zero) then we didn't
3147 find any valid line information. */
3152 val
.symtab
= best_symtab
;
3153 val
.line
= best
->line
;
3155 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3160 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3162 val
.section
= section
;
3166 /* Backward compatibility (no section). */
3168 struct symtab_and_line
3169 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3171 struct obj_section
*section
;
3173 section
= find_pc_overlay (pc
);
3174 if (pc_in_unmapped_range (pc
, section
))
3175 pc
= overlay_mapped_address (pc
, section
);
3176 return find_pc_sect_line (pc
, section
, notcurrent
);
3182 find_pc_line_symtab (CORE_ADDR pc
)
3184 struct symtab_and_line sal
;
3186 /* This always passes zero for NOTCURRENT to find_pc_line.
3187 There are currently no callers that ever pass non-zero. */
3188 sal
= find_pc_line (pc
, 0);
3192 /* Find line number LINE in any symtab whose name is the same as
3195 If found, return the symtab that contains the linetable in which it was
3196 found, set *INDEX to the index in the linetable of the best entry
3197 found, and set *EXACT_MATCH nonzero if the value returned is an
3200 If not found, return NULL. */
3203 find_line_symtab (struct symtab
*symtab
, int line
,
3204 int *index
, int *exact_match
)
3206 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3208 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3212 struct linetable
*best_linetable
;
3213 struct symtab
*best_symtab
;
3215 /* First try looking it up in the given symtab. */
3216 best_linetable
= SYMTAB_LINETABLE (symtab
);
3217 best_symtab
= symtab
;
3218 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3219 if (best_index
< 0 || !exact
)
3221 /* Didn't find an exact match. So we better keep looking for
3222 another symtab with the same name. In the case of xcoff,
3223 multiple csects for one source file (produced by IBM's FORTRAN
3224 compiler) produce multiple symtabs (this is unavoidable
3225 assuming csects can be at arbitrary places in memory and that
3226 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3228 /* BEST is the smallest linenumber > LINE so far seen,
3229 or 0 if none has been seen so far.
3230 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3233 struct objfile
*objfile
;
3234 struct compunit_symtab
*cu
;
3237 if (best_index
>= 0)
3238 best
= best_linetable
->item
[best_index
].line
;
3242 ALL_OBJFILES (objfile
)
3245 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
3246 symtab_to_fullname (symtab
));
3249 ALL_FILETABS (objfile
, cu
, s
)
3251 struct linetable
*l
;
3254 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
3256 if (FILENAME_CMP (symtab_to_fullname (symtab
),
3257 symtab_to_fullname (s
)) != 0)
3259 l
= SYMTAB_LINETABLE (s
);
3260 ind
= find_line_common (l
, line
, &exact
, 0);
3270 if (best
== 0 || l
->item
[ind
].line
< best
)
3272 best
= l
->item
[ind
].line
;
3285 *index
= best_index
;
3287 *exact_match
= exact
;
3292 /* Given SYMTAB, returns all the PCs function in the symtab that
3293 exactly match LINE. Returns an empty vector if there are no exact
3294 matches, but updates BEST_ITEM in this case. */
3296 std::vector
<CORE_ADDR
>
3297 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3298 struct linetable_entry
**best_item
)
3301 std::vector
<CORE_ADDR
> result
;
3303 /* First, collect all the PCs that are at this line. */
3309 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3316 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3318 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3324 result
.push_back (SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3332 /* Set the PC value for a given source file and line number and return true.
3333 Returns zero for invalid line number (and sets the PC to 0).
3334 The source file is specified with a struct symtab. */
3337 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3339 struct linetable
*l
;
3346 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3349 l
= SYMTAB_LINETABLE (symtab
);
3350 *pc
= l
->item
[ind
].pc
;
3357 /* Find the range of pc values in a line.
3358 Store the starting pc of the line into *STARTPTR
3359 and the ending pc (start of next line) into *ENDPTR.
3360 Returns 1 to indicate success.
3361 Returns 0 if could not find the specified line. */
3364 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3367 CORE_ADDR startaddr
;
3368 struct symtab_and_line found_sal
;
3371 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3374 /* This whole function is based on address. For example, if line 10 has
3375 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3376 "info line *0x123" should say the line goes from 0x100 to 0x200
3377 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3378 This also insures that we never give a range like "starts at 0x134
3379 and ends at 0x12c". */
3381 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3382 if (found_sal
.line
!= sal
.line
)
3384 /* The specified line (sal) has zero bytes. */
3385 *startptr
= found_sal
.pc
;
3386 *endptr
= found_sal
.pc
;
3390 *startptr
= found_sal
.pc
;
3391 *endptr
= found_sal
.end
;
3396 /* Given a line table and a line number, return the index into the line
3397 table for the pc of the nearest line whose number is >= the specified one.
3398 Return -1 if none is found. The value is >= 0 if it is an index.
3399 START is the index at which to start searching the line table.
3401 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3404 find_line_common (struct linetable
*l
, int lineno
,
3405 int *exact_match
, int start
)
3410 /* BEST is the smallest linenumber > LINENO so far seen,
3411 or 0 if none has been seen so far.
3412 BEST_INDEX identifies the item for it. */
3414 int best_index
= -1;
3425 for (i
= start
; i
< len
; i
++)
3427 struct linetable_entry
*item
= &(l
->item
[i
]);
3429 if (item
->line
== lineno
)
3431 /* Return the first (lowest address) entry which matches. */
3436 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3443 /* If we got here, we didn't get an exact match. */
3448 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3450 struct symtab_and_line sal
;
3452 sal
= find_pc_line (pc
, 0);
3455 return sal
.symtab
!= 0;
3458 /* Given a function symbol SYM, find the symtab and line for the start
3460 If the argument FUNFIRSTLINE is nonzero, we want the first line
3461 of real code inside the function.
3462 This function should return SALs matching those from minsym_found,
3463 otherwise false multiple-locations breakpoints could be placed. */
3465 struct symtab_and_line
3466 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
3468 struct symtab_and_line sal
;
3469 struct obj_section
*section
;
3471 fixup_symbol_section (sym
, NULL
);
3472 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
);
3473 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)), section
, 0);
3475 if (funfirstline
&& sal
.symtab
!= NULL
3476 && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal
.symtab
))
3477 || SYMTAB_LANGUAGE (sal
.symtab
) == language_asm
))
3479 struct gdbarch
*gdbarch
= symbol_arch (sym
);
3481 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3482 if (gdbarch_skip_entrypoint_p (gdbarch
))
3483 sal
.pc
= gdbarch_skip_entrypoint (gdbarch
, sal
.pc
);
3487 /* We always should have a line for the function start address.
3488 If we don't, something is odd. Create a plain SAL refering
3489 just the PC and hope that skip_prologue_sal (if requested)
3490 can find a line number for after the prologue. */
3491 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
3494 sal
.pspace
= current_program_space
;
3495 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3496 sal
.section
= section
;
3500 skip_prologue_sal (&sal
);
3505 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3506 address for that function that has an entry in SYMTAB's line info
3507 table. If such an entry cannot be found, return FUNC_ADDR
3511 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3513 CORE_ADDR func_start
, func_end
;
3514 struct linetable
*l
;
3517 /* Give up if this symbol has no lineinfo table. */
3518 l
= SYMTAB_LINETABLE (symtab
);
3522 /* Get the range for the function's PC values, or give up if we
3523 cannot, for some reason. */
3524 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3527 /* Linetable entries are ordered by PC values, see the commentary in
3528 symtab.h where `struct linetable' is defined. Thus, the first
3529 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3530 address we are looking for. */
3531 for (i
= 0; i
< l
->nitems
; i
++)
3533 struct linetable_entry
*item
= &(l
->item
[i
]);
3535 /* Don't use line numbers of zero, they mark special entries in
3536 the table. See the commentary on symtab.h before the
3537 definition of struct linetable. */
3538 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3545 /* Adjust SAL to the first instruction past the function prologue.
3546 If the PC was explicitly specified, the SAL is not changed.
3547 If the line number was explicitly specified, at most the SAL's PC
3548 is updated. If SAL is already past the prologue, then do nothing. */
3551 skip_prologue_sal (struct symtab_and_line
*sal
)
3554 struct symtab_and_line start_sal
;
3555 CORE_ADDR pc
, saved_pc
;
3556 struct obj_section
*section
;
3558 struct objfile
*objfile
;
3559 struct gdbarch
*gdbarch
;
3560 const struct block
*b
, *function_block
;
3561 int force_skip
, skip
;
3563 /* Do not change the SAL if PC was specified explicitly. */
3564 if (sal
->explicit_pc
)
3567 scoped_restore_current_pspace_and_thread restore_pspace_thread
;
3569 switch_to_program_space_and_thread (sal
->pspace
);
3571 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3574 fixup_symbol_section (sym
, NULL
);
3576 objfile
= symbol_objfile (sym
);
3577 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3578 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3579 name
= SYMBOL_LINKAGE_NAME (sym
);
3583 struct bound_minimal_symbol msymbol
3584 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3586 if (msymbol
.minsym
== NULL
)
3589 objfile
= msymbol
.objfile
;
3590 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3591 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3592 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3595 gdbarch
= get_objfile_arch (objfile
);
3597 /* Process the prologue in two passes. In the first pass try to skip the
3598 prologue (SKIP is true) and verify there is a real need for it (indicated
3599 by FORCE_SKIP). If no such reason was found run a second pass where the
3600 prologue is not skipped (SKIP is false). */
3605 /* Be conservative - allow direct PC (without skipping prologue) only if we
3606 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3607 have to be set by the caller so we use SYM instead. */
3609 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3617 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3618 so that gdbarch_skip_prologue has something unique to work on. */
3619 if (section_is_overlay (section
) && !section_is_mapped (section
))
3620 pc
= overlay_unmapped_address (pc
, section
);
3622 /* Skip "first line" of function (which is actually its prologue). */
3623 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3624 if (gdbarch_skip_entrypoint_p (gdbarch
))
3625 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3627 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
3629 /* For overlays, map pc back into its mapped VMA range. */
3630 pc
= overlay_mapped_address (pc
, section
);
3632 /* Calculate line number. */
3633 start_sal
= find_pc_sect_line (pc
, section
, 0);
3635 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3636 line is still part of the same function. */
3637 if (skip
&& start_sal
.pc
!= pc
3638 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3639 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3640 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3641 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3643 /* First pc of next line */
3645 /* Recalculate the line number (might not be N+1). */
3646 start_sal
= find_pc_sect_line (pc
, section
, 0);
3649 /* On targets with executable formats that don't have a concept of
3650 constructors (ELF with .init has, PE doesn't), gcc emits a call
3651 to `__main' in `main' between the prologue and before user
3653 if (gdbarch_skip_main_prologue_p (gdbarch
)
3654 && name
&& strcmp_iw (name
, "main") == 0)
3656 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3657 /* Recalculate the line number (might not be N+1). */
3658 start_sal
= find_pc_sect_line (pc
, section
, 0);
3662 while (!force_skip
&& skip
--);
3664 /* If we still don't have a valid source line, try to find the first
3665 PC in the lineinfo table that belongs to the same function. This
3666 happens with COFF debug info, which does not seem to have an
3667 entry in lineinfo table for the code after the prologue which has
3668 no direct relation to source. For example, this was found to be
3669 the case with the DJGPP target using "gcc -gcoff" when the
3670 compiler inserted code after the prologue to make sure the stack
3672 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3674 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3675 /* Recalculate the line number. */
3676 start_sal
= find_pc_sect_line (pc
, section
, 0);
3679 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3680 forward SAL to the end of the prologue. */
3685 sal
->section
= section
;
3687 /* Unless the explicit_line flag was set, update the SAL line
3688 and symtab to correspond to the modified PC location. */
3689 if (sal
->explicit_line
)
3692 sal
->symtab
= start_sal
.symtab
;
3693 sal
->line
= start_sal
.line
;
3694 sal
->end
= start_sal
.end
;
3696 /* Check if we are now inside an inlined function. If we can,
3697 use the call site of the function instead. */
3698 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3699 function_block
= NULL
;
3702 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3704 else if (BLOCK_FUNCTION (b
) != NULL
)
3706 b
= BLOCK_SUPERBLOCK (b
);
3708 if (function_block
!= NULL
3709 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3711 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3712 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3716 /* Given PC at the function's start address, attempt to find the
3717 prologue end using SAL information. Return zero if the skip fails.
3719 A non-optimized prologue traditionally has one SAL for the function
3720 and a second for the function body. A single line function has
3721 them both pointing at the same line.
3723 An optimized prologue is similar but the prologue may contain
3724 instructions (SALs) from the instruction body. Need to skip those
3725 while not getting into the function body.
3727 The functions end point and an increasing SAL line are used as
3728 indicators of the prologue's endpoint.
3730 This code is based on the function refine_prologue_limit
3734 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3736 struct symtab_and_line prologue_sal
;
3739 const struct block
*bl
;
3741 /* Get an initial range for the function. */
3742 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3743 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3745 prologue_sal
= find_pc_line (start_pc
, 0);
3746 if (prologue_sal
.line
!= 0)
3748 /* For languages other than assembly, treat two consecutive line
3749 entries at the same address as a zero-instruction prologue.
3750 The GNU assembler emits separate line notes for each instruction
3751 in a multi-instruction macro, but compilers generally will not
3753 if (prologue_sal
.symtab
->language
!= language_asm
)
3755 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3758 /* Skip any earlier lines, and any end-of-sequence marker
3759 from a previous function. */
3760 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3761 || linetable
->item
[idx
].line
== 0)
3764 if (idx
+1 < linetable
->nitems
3765 && linetable
->item
[idx
+1].line
!= 0
3766 && linetable
->item
[idx
+1].pc
== start_pc
)
3770 /* If there is only one sal that covers the entire function,
3771 then it is probably a single line function, like
3773 if (prologue_sal
.end
>= end_pc
)
3776 while (prologue_sal
.end
< end_pc
)
3778 struct symtab_and_line sal
;
3780 sal
= find_pc_line (prologue_sal
.end
, 0);
3783 /* Assume that a consecutive SAL for the same (or larger)
3784 line mark the prologue -> body transition. */
3785 if (sal
.line
>= prologue_sal
.line
)
3787 /* Likewise if we are in a different symtab altogether
3788 (e.g. within a file included via #include). */
3789 if (sal
.symtab
!= prologue_sal
.symtab
)
3792 /* The line number is smaller. Check that it's from the
3793 same function, not something inlined. If it's inlined,
3794 then there is no point comparing the line numbers. */
3795 bl
= block_for_pc (prologue_sal
.end
);
3798 if (block_inlined_p (bl
))
3800 if (BLOCK_FUNCTION (bl
))
3805 bl
= BLOCK_SUPERBLOCK (bl
);
3810 /* The case in which compiler's optimizer/scheduler has
3811 moved instructions into the prologue. We look ahead in
3812 the function looking for address ranges whose
3813 corresponding line number is less the first one that we
3814 found for the function. This is more conservative then
3815 refine_prologue_limit which scans a large number of SALs
3816 looking for any in the prologue. */
3821 if (prologue_sal
.end
< end_pc
)
3822 /* Return the end of this line, or zero if we could not find a
3824 return prologue_sal
.end
;
3826 /* Don't return END_PC, which is past the end of the function. */
3827 return prologue_sal
.pc
;
3830 /* If P is of the form "operator[ \t]+..." where `...' is
3831 some legitimate operator text, return a pointer to the
3832 beginning of the substring of the operator text.
3833 Otherwise, return "". */
3836 operator_chars (const char *p
, const char **end
)
3839 if (!startswith (p
, "operator"))
3843 /* Don't get faked out by `operator' being part of a longer
3845 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3848 /* Allow some whitespace between `operator' and the operator symbol. */
3849 while (*p
== ' ' || *p
== '\t')
3852 /* Recognize 'operator TYPENAME'. */
3854 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3856 const char *q
= p
+ 1;
3858 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3867 case '\\': /* regexp quoting */
3870 if (p
[2] == '=') /* 'operator\*=' */
3872 else /* 'operator\*' */
3876 else if (p
[1] == '[')
3879 error (_("mismatched quoting on brackets, "
3880 "try 'operator\\[\\]'"));
3881 else if (p
[2] == '\\' && p
[3] == ']')
3883 *end
= p
+ 4; /* 'operator\[\]' */
3887 error (_("nothing is allowed between '[' and ']'"));
3891 /* Gratuitous qoute: skip it and move on. */
3913 if (p
[0] == '-' && p
[1] == '>')
3915 /* Struct pointer member operator 'operator->'. */
3918 *end
= p
+ 3; /* 'operator->*' */
3921 else if (p
[2] == '\\')
3923 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3928 *end
= p
+ 2; /* 'operator->' */
3932 if (p
[1] == '=' || p
[1] == p
[0])
3943 error (_("`operator ()' must be specified "
3944 "without whitespace in `()'"));
3949 error (_("`operator ?:' must be specified "
3950 "without whitespace in `?:'"));
3955 error (_("`operator []' must be specified "
3956 "without whitespace in `[]'"));
3960 error (_("`operator %s' not supported"), p
);
3969 /* Cache to watch for file names already seen by filename_seen. */
3971 struct filename_seen_cache
3973 /* Table of files seen so far. */
3975 /* Initial size of the table. It automagically grows from here. */
3976 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3979 /* filename_seen_cache constructor. */
3981 static struct filename_seen_cache
*
3982 create_filename_seen_cache (void)
3984 struct filename_seen_cache
*cache
= XNEW (struct filename_seen_cache
);
3986 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3987 filename_hash
, filename_eq
,
3988 NULL
, xcalloc
, xfree
);
3993 /* Empty the cache, but do not delete it. */
3996 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
3998 htab_empty (cache
->tab
);
4001 /* filename_seen_cache destructor.
4002 This takes a void * argument as it is generally used as a cleanup. */
4005 delete_filename_seen_cache (void *ptr
)
4007 struct filename_seen_cache
*cache
= (struct filename_seen_cache
*) ptr
;
4009 htab_delete (cache
->tab
);
4013 /* If FILE is not already in the table of files in CACHE, return zero;
4014 otherwise return non-zero. Optionally add FILE to the table if ADD
4017 NOTE: We don't manage space for FILE, we assume FILE lives as long
4018 as the caller needs. */
4021 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
4025 /* Is FILE in tab? */
4026 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
4030 /* No; maybe add it to tab. */
4032 *slot
= (char *) file
;
4037 /* Data structure to maintain printing state for output_source_filename. */
4039 struct output_source_filename_data
4041 /* Cache of what we've seen so far. */
4042 struct filename_seen_cache
*filename_seen_cache
;
4044 /* Flag of whether we're printing the first one. */
4048 /* Slave routine for sources_info. Force line breaks at ,'s.
4049 NAME is the name to print.
4050 DATA contains the state for printing and watching for duplicates. */
4053 output_source_filename (const char *name
,
4054 struct output_source_filename_data
*data
)
4056 /* Since a single source file can result in several partial symbol
4057 tables, we need to avoid printing it more than once. Note: if
4058 some of the psymtabs are read in and some are not, it gets
4059 printed both under "Source files for which symbols have been
4060 read" and "Source files for which symbols will be read in on
4061 demand". I consider this a reasonable way to deal with the
4062 situation. I'm not sure whether this can also happen for
4063 symtabs; it doesn't hurt to check. */
4065 /* Was NAME already seen? */
4066 if (filename_seen (data
->filename_seen_cache
, name
, 1))
4068 /* Yes; don't print it again. */
4072 /* No; print it and reset *FIRST. */
4074 printf_filtered (", ");
4078 fputs_filtered (name
, gdb_stdout
);
4081 /* A callback for map_partial_symbol_filenames. */
4084 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4087 output_source_filename (fullname
? fullname
: filename
,
4088 (struct output_source_filename_data
*) data
);
4092 sources_info (char *ignore
, int from_tty
)
4094 struct compunit_symtab
*cu
;
4096 struct objfile
*objfile
;
4097 struct output_source_filename_data data
;
4098 struct cleanup
*cleanups
;
4100 if (!have_full_symbols () && !have_partial_symbols ())
4102 error (_("No symbol table is loaded. Use the \"file\" command."));
4105 data
.filename_seen_cache
= create_filename_seen_cache ();
4106 cleanups
= make_cleanup (delete_filename_seen_cache
,
4107 data
.filename_seen_cache
);
4109 printf_filtered ("Source files for which symbols have been read in:\n\n");
4112 ALL_FILETABS (objfile
, cu
, s
)
4114 const char *fullname
= symtab_to_fullname (s
);
4116 output_source_filename (fullname
, &data
);
4118 printf_filtered ("\n\n");
4120 printf_filtered ("Source files for which symbols "
4121 "will be read in on demand:\n\n");
4123 clear_filename_seen_cache (data
.filename_seen_cache
);
4125 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4126 1 /*need_fullname*/);
4127 printf_filtered ("\n");
4129 do_cleanups (cleanups
);
4132 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4133 non-zero compare only lbasename of FILES. */
4136 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4140 if (file
!= NULL
&& nfiles
!= 0)
4142 for (i
= 0; i
< nfiles
; i
++)
4144 if (compare_filenames_for_search (file
, (basenames
4145 ? lbasename (files
[i
])
4150 else if (nfiles
== 0)
4155 /* Free any memory associated with a search. */
4158 free_search_symbols (struct symbol_search
*symbols
)
4160 struct symbol_search
*p
;
4161 struct symbol_search
*next
;
4163 for (p
= symbols
; p
!= NULL
; p
= next
)
4171 do_free_search_symbols_cleanup (void *symbolsp
)
4173 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
4175 free_search_symbols (symbols
);
4179 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
4181 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
4184 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4185 sort symbols, not minimal symbols. */
4188 compare_search_syms (const void *sa
, const void *sb
)
4190 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
4191 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
4194 c
= FILENAME_CMP (symbol_symtab (sym_a
->symbol
)->filename
,
4195 symbol_symtab (sym_b
->symbol
)->filename
);
4199 if (sym_a
->block
!= sym_b
->block
)
4200 return sym_a
->block
- sym_b
->block
;
4202 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
4203 SYMBOL_PRINT_NAME (sym_b
->symbol
));
4206 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
4207 The duplicates are freed, and the new list is returned in
4208 *NEW_HEAD, *NEW_TAIL. */
4211 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
4212 struct symbol_search
**new_head
,
4213 struct symbol_search
**new_tail
)
4215 struct symbol_search
**symbols
, *symp
;
4218 gdb_assert (found
!= NULL
&& nfound
> 0);
4220 /* Build an array out of the list so we can easily sort them. */
4221 symbols
= XNEWVEC (struct symbol_search
*, nfound
);
4224 for (i
= 0; i
< nfound
; i
++)
4226 gdb_assert (symp
!= NULL
);
4227 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
4231 gdb_assert (symp
== NULL
);
4233 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
4234 compare_search_syms
);
4236 /* Collapse out the dups. */
4237 for (i
= 1, j
= 1; i
< nfound
; ++i
)
4239 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
4240 symbols
[j
++] = symbols
[i
];
4245 symbols
[j
- 1]->next
= NULL
;
4247 /* Rebuild the linked list. */
4248 for (i
= 0; i
< nunique
- 1; i
++)
4249 symbols
[i
]->next
= symbols
[i
+ 1];
4250 symbols
[nunique
- 1]->next
= NULL
;
4252 *new_head
= symbols
[0];
4253 *new_tail
= symbols
[nunique
- 1];
4257 /* Search the symbol table for matches to the regular expression REGEXP,
4258 returning the results in *MATCHES.
4260 Only symbols of KIND are searched:
4261 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4262 and constants (enums)
4263 FUNCTIONS_DOMAIN - search all functions
4264 TYPES_DOMAIN - search all type names
4265 ALL_DOMAIN - an internal error for this function
4267 free_search_symbols should be called when *MATCHES is no longer needed.
4269 Within each file the results are sorted locally; each symtab's global and
4270 static blocks are separately alphabetized.
4271 Duplicate entries are removed. */
4274 search_symbols (const char *regexp
, enum search_domain kind
,
4275 int nfiles
, const char *files
[],
4276 struct symbol_search
**matches
)
4278 struct compunit_symtab
*cust
;
4279 const struct blockvector
*bv
;
4282 struct block_iterator iter
;
4284 struct objfile
*objfile
;
4285 struct minimal_symbol
*msymbol
;
4287 static const enum minimal_symbol_type types
[]
4288 = {mst_data
, mst_text
, mst_abs
};
4289 static const enum minimal_symbol_type types2
[]
4290 = {mst_bss
, mst_file_text
, mst_abs
};
4291 static const enum minimal_symbol_type types3
[]
4292 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4293 static const enum minimal_symbol_type types4
[]
4294 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4295 enum minimal_symbol_type ourtype
;
4296 enum minimal_symbol_type ourtype2
;
4297 enum minimal_symbol_type ourtype3
;
4298 enum minimal_symbol_type ourtype4
;
4299 struct symbol_search
*found
;
4300 struct symbol_search
*tail
;
4302 /* This is true if PREG contains valid data, false otherwise. */
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
];
4323 /* Make sure spacing is right for C++ operators.
4324 This is just a courtesy to make the matching less sensitive
4325 to how many spaces the user leaves between 'operator'
4326 and <TYPENAME> or <OPERATOR>. */
4328 const char *opname
= operator_chars (regexp
, &opend
);
4333 int fix
= -1; /* -1 means ok; otherwise number of
4336 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4338 /* There should 1 space between 'operator' and 'TYPENAME'. */
4339 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4344 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4345 if (opname
[-1] == ' ')
4348 /* If wrong number of spaces, fix it. */
4351 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4353 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4358 errcode
= regcomp (&preg
, regexp
,
4359 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4363 char *err
= get_regcomp_error (errcode
, &preg
);
4365 make_cleanup (xfree
, err
);
4366 error (_("Invalid regexp (%s): %s"), err
, regexp
);
4369 make_regfree_cleanup (&preg
);
4372 /* Search through the partial symtabs *first* for all symbols
4373 matching the regexp. That way we don't have to reproduce all of
4374 the machinery below. */
4375 expand_symtabs_matching ([&] (const char *filename
, bool basenames
)
4377 return file_matches (filename
, files
, nfiles
,
4380 [&] (const char *symname
)
4382 return (!preg_p
|| regexec (&preg
, symname
,
4388 /* Here, we search through the minimal symbol tables for functions
4389 and variables that match, and force their symbols to be read.
4390 This is in particular necessary for demangled variable names,
4391 which are no longer put into the partial symbol tables.
4392 The symbol will then be found during the scan of symtabs below.
4394 For functions, find_pc_symtab should succeed if we have debug info
4395 for the function, for variables we have to call
4396 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4398 If the lookup fails, set found_misc so that we will rescan to print
4399 any matching symbols without debug info.
4400 We only search the objfile the msymbol came from, we no longer search
4401 all objfiles. In large programs (1000s of shared libs) searching all
4402 objfiles is not worth the pain. */
4404 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4406 ALL_MSYMBOLS (objfile
, msymbol
)
4410 if (msymbol
->created_by_gdb
)
4413 if (MSYMBOL_TYPE (msymbol
) == ourtype
4414 || MSYMBOL_TYPE (msymbol
) == ourtype2
4415 || MSYMBOL_TYPE (msymbol
) == ourtype3
4416 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4419 || regexec (&preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4422 /* Note: An important side-effect of these lookup functions
4423 is to expand the symbol table if msymbol is found, for the
4424 benefit of the next loop on ALL_COMPUNITS. */
4425 if (kind
== FUNCTIONS_DOMAIN
4426 ? (find_pc_compunit_symtab
4427 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
)
4428 : (lookup_symbol_in_objfile_from_linkage_name
4429 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4440 retval_chain
= make_cleanup_free_search_symbols (&found
);
4442 ALL_COMPUNITS (objfile
, cust
)
4444 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4445 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4447 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4448 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4450 struct symtab
*real_symtab
= symbol_symtab (sym
);
4454 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
4455 a substring of symtab_to_fullname as it may contain "./" etc. */
4456 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4457 || ((basenames_may_differ
4458 || file_matches (lbasename (real_symtab
->filename
),
4460 && file_matches (symtab_to_fullname (real_symtab
),
4463 || regexec (&preg
, SYMBOL_NATURAL_NAME (sym
), 0,
4465 && ((kind
== VARIABLES_DOMAIN
4466 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4467 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4468 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4469 /* LOC_CONST can be used for more than just enums,
4470 e.g., c++ static const members.
4471 We only want to skip enums here. */
4472 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4473 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4474 == TYPE_CODE_ENUM
)))
4475 || (kind
== FUNCTIONS_DOMAIN
4476 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4477 || (kind
== TYPES_DOMAIN
4478 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4481 struct symbol_search
*psr
= XCNEW (struct symbol_search
);
4499 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
4500 /* Note: nfound is no longer useful beyond this point. */
4503 /* If there are no eyes, avoid all contact. I mean, if there are
4504 no debug symbols, then add matching minsyms. */
4506 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4508 ALL_MSYMBOLS (objfile
, msymbol
)
4512 if (msymbol
->created_by_gdb
)
4515 if (MSYMBOL_TYPE (msymbol
) == ourtype
4516 || MSYMBOL_TYPE (msymbol
) == ourtype2
4517 || MSYMBOL_TYPE (msymbol
) == ourtype3
4518 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4521 || regexec (&preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4524 /* For functions we can do a quick check of whether the
4525 symbol might be found via find_pc_symtab. */
4526 if (kind
!= FUNCTIONS_DOMAIN
4527 || (find_pc_compunit_symtab
4528 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
))
4530 if (lookup_symbol_in_objfile_from_linkage_name
4531 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4535 struct symbol_search
*psr
= XNEW (struct symbol_search
);
4537 psr
->msymbol
.minsym
= msymbol
;
4538 psr
->msymbol
.objfile
= objfile
;
4553 discard_cleanups (retval_chain
);
4554 do_cleanups (old_chain
);
4558 /* Helper function for symtab_symbol_info, this function uses
4559 the data returned from search_symbols() to print information
4560 regarding the match to gdb_stdout. */
4563 print_symbol_info (enum search_domain kind
,
4565 int block
, const char *last
)
4567 struct symtab
*s
= symbol_symtab (sym
);
4568 const char *s_filename
= symtab_to_filename_for_display (s
);
4570 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
4572 fputs_filtered ("\nFile ", gdb_stdout
);
4573 fputs_filtered (s_filename
, gdb_stdout
);
4574 fputs_filtered (":\n", gdb_stdout
);
4577 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4578 printf_filtered ("static ");
4580 /* Typedef that is not a C++ class. */
4581 if (kind
== TYPES_DOMAIN
4582 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4583 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4584 /* variable, func, or typedef-that-is-c++-class. */
4585 else if (kind
< TYPES_DOMAIN
4586 || (kind
== TYPES_DOMAIN
4587 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4589 type_print (SYMBOL_TYPE (sym
),
4590 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4591 ? "" : SYMBOL_PRINT_NAME (sym
)),
4594 printf_filtered (";\n");
4598 /* This help function for symtab_symbol_info() prints information
4599 for non-debugging symbols to gdb_stdout. */
4602 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4604 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4607 if (gdbarch_addr_bit (gdbarch
) <= 32)
4608 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4609 & (CORE_ADDR
) 0xffffffff,
4612 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4614 printf_filtered ("%s %s\n",
4615 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4618 /* This is the guts of the commands "info functions", "info types", and
4619 "info variables". It calls search_symbols to find all matches and then
4620 print_[m]symbol_info to print out some useful information about the
4624 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4626 static const char * const classnames
[] =
4627 {"variable", "function", "type"};
4628 struct symbol_search
*symbols
;
4629 struct symbol_search
*p
;
4630 struct cleanup
*old_chain
;
4631 const char *last_filename
= NULL
;
4634 gdb_assert (kind
<= TYPES_DOMAIN
);
4636 /* Must make sure that if we're interrupted, symbols gets freed. */
4637 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4638 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4641 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4642 classnames
[kind
], regexp
);
4644 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4646 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4650 if (p
->msymbol
.minsym
!= NULL
)
4654 printf_filtered (_("\nNon-debugging symbols:\n"));
4657 print_msymbol_info (p
->msymbol
);
4661 print_symbol_info (kind
,
4666 = symtab_to_filename_for_display (symbol_symtab (p
->symbol
));
4670 do_cleanups (old_chain
);
4674 variables_info (char *regexp
, int from_tty
)
4676 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4680 functions_info (char *regexp
, int from_tty
)
4682 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4687 types_info (char *regexp
, int from_tty
)
4689 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4692 /* Breakpoint all functions matching regular expression. */
4695 rbreak_command_wrapper (char *regexp
, int from_tty
)
4697 rbreak_command (regexp
, from_tty
);
4700 /* A cleanup function that calls end_rbreak_breakpoints. */
4703 do_end_rbreak_breakpoints (void *ignore
)
4705 end_rbreak_breakpoints ();
4709 rbreak_command (char *regexp
, int from_tty
)
4711 struct symbol_search
*ss
;
4712 struct symbol_search
*p
;
4713 struct cleanup
*old_chain
;
4714 char *string
= NULL
;
4716 const char **files
= NULL
;
4717 const char *file_name
;
4722 char *colon
= strchr (regexp
, ':');
4724 if (colon
&& *(colon
+ 1) != ':')
4729 colon_index
= colon
- regexp
;
4730 local_name
= (char *) alloca (colon_index
+ 1);
4731 memcpy (local_name
, regexp
, colon_index
);
4732 local_name
[colon_index
--] = 0;
4733 while (isspace (local_name
[colon_index
]))
4734 local_name
[colon_index
--] = 0;
4735 file_name
= local_name
;
4738 regexp
= skip_spaces (colon
+ 1);
4742 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4743 old_chain
= make_cleanup_free_search_symbols (&ss
);
4744 make_cleanup (free_current_contents
, &string
);
4746 start_rbreak_breakpoints ();
4747 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4748 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4750 if (p
->msymbol
.minsym
== NULL
)
4752 struct symtab
*symtab
= symbol_symtab (p
->symbol
);
4753 const char *fullname
= symtab_to_fullname (symtab
);
4755 int newlen
= (strlen (fullname
)
4756 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4761 string
= (char *) xrealloc (string
, newlen
);
4764 strcpy (string
, fullname
);
4765 strcat (string
, ":'");
4766 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
4767 strcat (string
, "'");
4768 break_command (string
, from_tty
);
4769 print_symbol_info (FUNCTIONS_DOMAIN
,
4772 symtab_to_filename_for_display (symtab
));
4776 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4780 string
= (char *) xrealloc (string
, newlen
);
4783 strcpy (string
, "'");
4784 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4785 strcat (string
, "'");
4787 break_command (string
, from_tty
);
4788 printf_filtered ("<function, no debug info> %s;\n",
4789 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4793 do_cleanups (old_chain
);
4797 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4799 Either sym_text[sym_text_len] != '(' and then we search for any
4800 symbol starting with SYM_TEXT text.
4802 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4803 be terminated at that point. Partial symbol tables do not have parameters
4807 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4809 int (*ncmp
) (const char *, const char *, size_t);
4811 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4813 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4816 if (sym_text
[sym_text_len
] == '(')
4818 /* User searches for `name(someth...'. Require NAME to be terminated.
4819 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4820 present but accept even parameters presence. In this case this
4821 function is in fact strcmp_iw but whitespace skipping is not supported
4822 for tab completion. */
4824 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4831 /* Free any memory associated with a completion list. */
4834 free_completion_list (VEC (char_ptr
) **list_ptr
)
4839 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4841 VEC_free (char_ptr
, *list_ptr
);
4844 /* Callback for make_cleanup. */
4847 do_free_completion_list (void *list
)
4849 free_completion_list ((VEC (char_ptr
) **) list
);
4852 /* Helper routine for make_symbol_completion_list. */
4854 static VEC (char_ptr
) *return_val
;
4856 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4857 completion_list_add_name \
4858 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4860 #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4861 completion_list_add_name \
4862 (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4864 /* Tracker for how many unique completions have been generated. Used
4865 to terminate completion list generation early if the list has grown
4866 to a size so large as to be useless. This helps avoid GDB seeming
4867 to lock up in the event the user requests to complete on something
4868 vague that necessitates the time consuming expansion of many symbol
4871 static completion_tracker_t completion_tracker
;
4873 /* Test to see if the symbol specified by SYMNAME (which is already
4874 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4875 characters. If so, add it to the current completion list. */
4878 completion_list_add_name (const char *symname
,
4879 const char *sym_text
, int sym_text_len
,
4880 const char *text
, const char *word
)
4882 /* Clip symbols that cannot match. */
4883 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4886 /* We have a match for a completion, so add SYMNAME to the current list
4887 of matches. Note that the name is moved to freshly malloc'd space. */
4891 enum maybe_add_completion_enum add_status
;
4893 if (word
== sym_text
)
4895 newobj
= (char *) xmalloc (strlen (symname
) + 5);
4896 strcpy (newobj
, symname
);
4898 else if (word
> sym_text
)
4900 /* Return some portion of symname. */
4901 newobj
= (char *) xmalloc (strlen (symname
) + 5);
4902 strcpy (newobj
, symname
+ (word
- sym_text
));
4906 /* Return some of SYM_TEXT plus symname. */
4907 newobj
= (char *) xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4908 strncpy (newobj
, word
, sym_text
- word
);
4909 newobj
[sym_text
- word
] = '\0';
4910 strcat (newobj
, symname
);
4913 add_status
= maybe_add_completion (completion_tracker
, newobj
);
4917 case MAYBE_ADD_COMPLETION_OK
:
4918 VEC_safe_push (char_ptr
, return_val
, newobj
);
4920 case MAYBE_ADD_COMPLETION_OK_MAX_REACHED
:
4921 VEC_safe_push (char_ptr
, return_val
, newobj
);
4922 throw_max_completions_reached_error ();
4923 case MAYBE_ADD_COMPLETION_MAX_REACHED
:
4925 throw_max_completions_reached_error ();
4926 case MAYBE_ADD_COMPLETION_DUPLICATE
:
4933 /* ObjC: In case we are completing on a selector, look as the msymbol
4934 again and feed all the selectors into the mill. */
4937 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4938 const char *sym_text
, int sym_text_len
,
4939 const char *text
, const char *word
)
4941 static char *tmp
= NULL
;
4942 static unsigned int tmplen
= 0;
4944 const char *method
, *category
, *selector
;
4947 method
= MSYMBOL_NATURAL_NAME (msymbol
);
4949 /* Is it a method? */
4950 if ((method
[0] != '-') && (method
[0] != '+'))
4953 if (sym_text
[0] == '[')
4954 /* Complete on shortened method method. */
4955 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4957 while ((strlen (method
) + 1) >= tmplen
)
4963 tmp
= (char *) xrealloc (tmp
, tmplen
);
4965 selector
= strchr (method
, ' ');
4966 if (selector
!= NULL
)
4969 category
= strchr (method
, '(');
4971 if ((category
!= NULL
) && (selector
!= NULL
))
4973 memcpy (tmp
, method
, (category
- method
));
4974 tmp
[category
- method
] = ' ';
4975 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4976 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4977 if (sym_text
[0] == '[')
4978 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4981 if (selector
!= NULL
)
4983 /* Complete on selector only. */
4984 strcpy (tmp
, selector
);
4985 tmp2
= strchr (tmp
, ']');
4989 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4993 /* Break the non-quoted text based on the characters which are in
4994 symbols. FIXME: This should probably be language-specific. */
4997 language_search_unquoted_string (const char *text
, const char *p
)
4999 for (; p
> text
; --p
)
5001 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5005 if ((current_language
->la_language
== language_objc
))
5007 if (p
[-1] == ':') /* Might be part of a method name. */
5009 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5010 p
-= 2; /* Beginning of a method name. */
5011 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5012 { /* Might be part of a method name. */
5015 /* Seeing a ' ' or a '(' is not conclusive evidence
5016 that we are in the middle of a method name. However,
5017 finding "-[" or "+[" should be pretty un-ambiguous.
5018 Unfortunately we have to find it now to decide. */
5021 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5022 t
[-1] == ' ' || t
[-1] == ':' ||
5023 t
[-1] == '(' || t
[-1] == ')')
5028 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5029 p
= t
- 2; /* Method name detected. */
5030 /* Else we leave with p unchanged. */
5040 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
5041 int sym_text_len
, const char *text
,
5044 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5046 struct type
*t
= SYMBOL_TYPE (sym
);
5047 enum type_code c
= TYPE_CODE (t
);
5050 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5051 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5052 if (TYPE_FIELD_NAME (t
, j
))
5053 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
5054 sym_text
, sym_text_len
, text
, word
);
5058 /* Add matching symbols from SYMTAB to the current completion list. */
5061 add_symtab_completions (struct compunit_symtab
*cust
,
5062 const char *sym_text
, int sym_text_len
,
5063 const char *text
, const char *word
,
5064 enum type_code code
)
5067 const struct block
*b
;
5068 struct block_iterator iter
;
5074 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5077 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5078 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5080 if (code
== TYPE_CODE_UNDEF
5081 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5082 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5083 COMPLETION_LIST_ADD_SYMBOL (sym
,
5084 sym_text
, sym_text_len
,
5091 default_make_symbol_completion_list_break_on_1 (const char *text
,
5093 const char *break_on
,
5094 enum type_code code
)
5096 /* Problem: All of the symbols have to be copied because readline
5097 frees them. I'm not going to worry about this; hopefully there
5098 won't be that many. */
5101 struct compunit_symtab
*cust
;
5102 struct minimal_symbol
*msymbol
;
5103 struct objfile
*objfile
;
5104 const struct block
*b
;
5105 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5106 struct block_iterator iter
;
5107 /* The symbol we are completing on. Points in same buffer as text. */
5108 const char *sym_text
;
5109 /* Length of sym_text. */
5111 struct cleanup
*cleanups
;
5113 /* Now look for the symbol we are supposed to complete on. */
5117 const char *quote_pos
= NULL
;
5119 /* First see if this is a quoted string. */
5121 for (p
= text
; *p
!= '\0'; ++p
)
5123 if (quote_found
!= '\0')
5125 if (*p
== quote_found
)
5126 /* Found close quote. */
5128 else if (*p
== '\\' && p
[1] == quote_found
)
5129 /* A backslash followed by the quote character
5130 doesn't end the string. */
5133 else if (*p
== '\'' || *p
== '"')
5139 if (quote_found
== '\'')
5140 /* A string within single quotes can be a symbol, so complete on it. */
5141 sym_text
= quote_pos
+ 1;
5142 else if (quote_found
== '"')
5143 /* A double-quoted string is never a symbol, nor does it make sense
5144 to complete it any other way. */
5150 /* It is not a quoted string. Break it based on the characters
5151 which are in symbols. */
5154 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5155 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5164 sym_text_len
= strlen (sym_text
);
5166 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
5168 if (current_language
->la_language
== language_cplus
5169 || current_language
->la_language
== language_fortran
)
5171 /* These languages may have parameters entered by user but they are never
5172 present in the partial symbol tables. */
5174 const char *cs
= (const char *) memchr (sym_text
, '(', sym_text_len
);
5177 sym_text_len
= cs
- sym_text
;
5179 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
5181 completion_tracker
= new_completion_tracker ();
5182 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5184 /* At this point scan through the misc symbol vectors and add each
5185 symbol you find to the list. Eventually we want to ignore
5186 anything that isn't a text symbol (everything else will be
5187 handled by the psymtab code below). */
5189 if (code
== TYPE_CODE_UNDEF
)
5191 ALL_MSYMBOLS (objfile
, msymbol
)
5194 MCOMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
5197 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
5202 /* Add completions for all currently loaded symbol tables. */
5203 ALL_COMPUNITS (objfile
, cust
)
5204 add_symtab_completions (cust
, sym_text
, sym_text_len
, text
, word
,
5207 /* Look through the partial symtabs for all symbols which begin by
5208 matching SYM_TEXT. Expand all CUs that you find to the list. */
5209 expand_symtabs_matching (NULL
,
5210 [&] (const char *name
) /* symbol matcher */
5212 return compare_symbol_name (name
,
5216 [&] (compunit_symtab
*symtab
) /* expansion notify */
5218 add_symtab_completions (symtab
,
5219 sym_text
, sym_text_len
,
5224 /* Search upwards from currently selected frame (so that we can
5225 complete on local vars). Also catch fields of types defined in
5226 this places which match our text string. Only complete on types
5227 visible from current context. */
5229 b
= get_selected_block (0);
5230 surrounding_static_block
= block_static_block (b
);
5231 surrounding_global_block
= block_global_block (b
);
5232 if (surrounding_static_block
!= NULL
)
5233 while (b
!= surrounding_static_block
)
5237 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5239 if (code
== TYPE_CODE_UNDEF
)
5241 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5243 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
5246 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5247 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5248 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5252 /* Stop when we encounter an enclosing function. Do not stop for
5253 non-inlined functions - the locals of the enclosing function
5254 are in scope for a nested function. */
5255 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5257 b
= BLOCK_SUPERBLOCK (b
);
5260 /* Add fields from the file's types; symbols will be added below. */
5262 if (code
== TYPE_CODE_UNDEF
)
5264 if (surrounding_static_block
!= NULL
)
5265 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5266 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5268 if (surrounding_global_block
!= NULL
)
5269 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5270 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5273 /* Skip macros if we are completing a struct tag -- arguable but
5274 usually what is expected. */
5275 if (current_language
->la_macro_expansion
== macro_expansion_c
5276 && code
== TYPE_CODE_UNDEF
)
5278 struct macro_scope
*scope
;
5280 /* This adds a macro's name to the current completion list. */
5281 auto add_macro_name
= [&] (const char *macro_name
,
5282 const macro_definition
*,
5283 macro_source_file
*,
5286 completion_list_add_name (macro_name
,
5287 sym_text
, sym_text_len
,
5291 /* Add any macros visible in the default scope. Note that this
5292 may yield the occasional wrong result, because an expression
5293 might be evaluated in a scope other than the default. For
5294 example, if the user types "break file:line if <TAB>", the
5295 resulting expression will be evaluated at "file:line" -- but
5296 at there does not seem to be a way to detect this at
5298 scope
= default_macro_scope ();
5301 macro_for_each_in_scope (scope
->file
, scope
->line
,
5306 /* User-defined macros are always visible. */
5307 macro_for_each (macro_user_macros
, add_macro_name
);
5310 do_cleanups (cleanups
);
5314 default_make_symbol_completion_list_break_on (const char *text
,
5316 const char *break_on
,
5317 enum type_code code
)
5319 struct cleanup
*back_to
;
5322 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5326 default_make_symbol_completion_list_break_on_1 (text
, word
,
5329 CATCH (except
, RETURN_MASK_ERROR
)
5331 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5332 throw_exception (except
);
5336 discard_cleanups (back_to
);
5341 default_make_symbol_completion_list (const char *text
, const char *word
,
5342 enum type_code code
)
5344 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
5347 /* Return a vector of all symbols (regardless of class) which begin by
5348 matching TEXT. If the answer is no symbols, then the return value
5352 make_symbol_completion_list (const char *text
, const char *word
)
5354 return current_language
->la_make_symbol_completion_list (text
, word
,
5358 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
5359 symbols whose type code is CODE. */
5362 make_symbol_completion_type (const char *text
, const char *word
,
5363 enum type_code code
)
5365 gdb_assert (code
== TYPE_CODE_UNION
5366 || code
== TYPE_CODE_STRUCT
5367 || code
== TYPE_CODE_ENUM
);
5368 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
5371 /* Like make_symbol_completion_list, but suitable for use as a
5372 completion function. */
5375 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
5376 const char *text
, const char *word
)
5378 return make_symbol_completion_list (text
, word
);
5381 /* Like make_symbol_completion_list, but returns a list of symbols
5382 defined in a source file FILE. */
5384 static VEC (char_ptr
) *
5385 make_file_symbol_completion_list_1 (const char *text
, const char *word
,
5386 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 /* Find the symtab for SRCFILE (this loads it if it was not yet read
5441 s
= lookup_symtab (srcfile
);
5444 /* Maybe they typed the file with leading directories, while the
5445 symbol tables record only its basename. */
5446 const char *tail
= lbasename (srcfile
);
5449 s
= lookup_symtab (tail
);
5452 /* If we have no symtab for that file, return an empty list. */
5454 return (return_val
);
5456 /* Go through this symtab and check the externs and statics for
5457 symbols which match. */
5458 add_symtab_completions (SYMTAB_COMPUNIT (s
),
5459 sym_text
, sym_text_len
,
5460 text
, word
, TYPE_CODE_UNDEF
);
5462 return (return_val
);
5465 /* Wrapper around make_file_symbol_completion_list_1
5466 to handle MAX_COMPLETIONS_REACHED_ERROR. */
5469 make_file_symbol_completion_list (const char *text
, const char *word
,
5470 const char *srcfile
)
5472 struct cleanup
*back_to
, *cleanups
;
5474 completion_tracker
= new_completion_tracker ();
5475 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5477 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5481 make_file_symbol_completion_list_1 (text
, word
, srcfile
);
5483 CATCH (except
, RETURN_MASK_ERROR
)
5485 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5486 throw_exception (except
);
5490 discard_cleanups (back_to
);
5491 do_cleanups (cleanups
);
5495 /* A helper function for make_source_files_completion_list. It adds
5496 another file name to a list of possible completions, growing the
5497 list as necessary. */
5500 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5501 VEC (char_ptr
) **list
)
5504 size_t fnlen
= strlen (fname
);
5508 /* Return exactly fname. */
5509 newobj
= (char *) xmalloc (fnlen
+ 5);
5510 strcpy (newobj
, fname
);
5512 else if (word
> text
)
5514 /* Return some portion of fname. */
5515 newobj
= (char *) xmalloc (fnlen
+ 5);
5516 strcpy (newobj
, fname
+ (word
- text
));
5520 /* Return some of TEXT plus fname. */
5521 newobj
= (char *) xmalloc (fnlen
+ (text
- word
) + 5);
5522 strncpy (newobj
, word
, text
- word
);
5523 newobj
[text
- word
] = '\0';
5524 strcat (newobj
, fname
);
5526 VEC_safe_push (char_ptr
, *list
, newobj
);
5530 not_interesting_fname (const char *fname
)
5532 static const char *illegal_aliens
[] = {
5533 "_globals_", /* inserted by coff_symtab_read */
5538 for (i
= 0; illegal_aliens
[i
]; i
++)
5540 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5546 /* An object of this type is passed as the user_data argument to
5547 map_partial_symbol_filenames. */
5548 struct add_partial_filename_data
5550 struct filename_seen_cache
*filename_seen_cache
;
5554 VEC (char_ptr
) **list
;
5557 /* A callback for map_partial_symbol_filenames. */
5560 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5563 struct add_partial_filename_data
*data
5564 = (struct add_partial_filename_data
*) user_data
;
5566 if (not_interesting_fname (filename
))
5568 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
5569 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5571 /* This file matches for a completion; add it to the
5572 current list of matches. */
5573 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5577 const char *base_name
= lbasename (filename
);
5579 if (base_name
!= filename
5580 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
5581 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5582 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5586 /* Return a vector of all source files whose names begin with matching
5587 TEXT. The file names are looked up in the symbol tables of this
5588 program. If the answer is no matchess, then the return value is
5592 make_source_files_completion_list (const char *text
, const char *word
)
5594 struct compunit_symtab
*cu
;
5596 struct objfile
*objfile
;
5597 size_t text_len
= strlen (text
);
5598 VEC (char_ptr
) *list
= NULL
;
5599 const char *base_name
;
5600 struct add_partial_filename_data datum
;
5601 struct filename_seen_cache
*filename_seen_cache
;
5602 struct cleanup
*back_to
, *cache_cleanup
;
5604 if (!have_full_symbols () && !have_partial_symbols ())
5607 back_to
= make_cleanup (do_free_completion_list
, &list
);
5609 filename_seen_cache
= create_filename_seen_cache ();
5610 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
5611 filename_seen_cache
);
5613 ALL_FILETABS (objfile
, cu
, s
)
5615 if (not_interesting_fname (s
->filename
))
5617 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
5618 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5620 /* This file matches for a completion; add it to the current
5622 add_filename_to_list (s
->filename
, text
, word
, &list
);
5626 /* NOTE: We allow the user to type a base name when the
5627 debug info records leading directories, but not the other
5628 way around. This is what subroutines of breakpoint
5629 command do when they parse file names. */
5630 base_name
= lbasename (s
->filename
);
5631 if (base_name
!= s
->filename
5632 && !filename_seen (filename_seen_cache
, base_name
, 1)
5633 && filename_ncmp (base_name
, text
, text_len
) == 0)
5634 add_filename_to_list (base_name
, text
, word
, &list
);
5638 datum
.filename_seen_cache
= filename_seen_cache
;
5641 datum
.text_len
= text_len
;
5643 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5644 0 /*need_fullname*/);
5646 do_cleanups (cache_cleanup
);
5647 discard_cleanups (back_to
);
5654 /* Return the "main_info" object for the current program space. If
5655 the object has not yet been created, create it and fill in some
5658 static struct main_info
*
5659 get_main_info (void)
5661 struct main_info
*info
5662 = (struct main_info
*) program_space_data (current_program_space
,
5663 main_progspace_key
);
5667 /* It may seem strange to store the main name in the progspace
5668 and also in whatever objfile happens to see a main name in
5669 its debug info. The reason for this is mainly historical:
5670 gdb returned "main" as the name even if no function named
5671 "main" was defined the program; and this approach lets us
5672 keep compatibility. */
5673 info
= XCNEW (struct main_info
);
5674 info
->language_of_main
= language_unknown
;
5675 set_program_space_data (current_program_space
, main_progspace_key
,
5682 /* A cleanup to destroy a struct main_info when a progspace is
5686 main_info_cleanup (struct program_space
*pspace
, void *data
)
5688 struct main_info
*info
= (struct main_info
*) data
;
5691 xfree (info
->name_of_main
);
5696 set_main_name (const char *name
, enum language lang
)
5698 struct main_info
*info
= get_main_info ();
5700 if (info
->name_of_main
!= NULL
)
5702 xfree (info
->name_of_main
);
5703 info
->name_of_main
= NULL
;
5704 info
->language_of_main
= language_unknown
;
5708 info
->name_of_main
= xstrdup (name
);
5709 info
->language_of_main
= lang
;
5713 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5717 find_main_name (void)
5719 const char *new_main_name
;
5720 struct objfile
*objfile
;
5722 /* First check the objfiles to see whether a debuginfo reader has
5723 picked up the appropriate main name. Historically the main name
5724 was found in a more or less random way; this approach instead
5725 relies on the order of objfile creation -- which still isn't
5726 guaranteed to get the correct answer, but is just probably more
5728 ALL_OBJFILES (objfile
)
5730 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5732 set_main_name (objfile
->per_bfd
->name_of_main
,
5733 objfile
->per_bfd
->language_of_main
);
5738 /* Try to see if the main procedure is in Ada. */
5739 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5740 be to add a new method in the language vector, and call this
5741 method for each language until one of them returns a non-empty
5742 name. This would allow us to remove this hard-coded call to
5743 an Ada function. It is not clear that this is a better approach
5744 at this point, because all methods need to be written in a way
5745 such that false positives never be returned. For instance, it is
5746 important that a method does not return a wrong name for the main
5747 procedure if the main procedure is actually written in a different
5748 language. It is easy to guaranty this with Ada, since we use a
5749 special symbol generated only when the main in Ada to find the name
5750 of the main procedure. It is difficult however to see how this can
5751 be guarantied for languages such as C, for instance. This suggests
5752 that order of call for these methods becomes important, which means
5753 a more complicated approach. */
5754 new_main_name
= ada_main_name ();
5755 if (new_main_name
!= NULL
)
5757 set_main_name (new_main_name
, language_ada
);
5761 new_main_name
= d_main_name ();
5762 if (new_main_name
!= NULL
)
5764 set_main_name (new_main_name
, language_d
);
5768 new_main_name
= go_main_name ();
5769 if (new_main_name
!= NULL
)
5771 set_main_name (new_main_name
, language_go
);
5775 new_main_name
= pascal_main_name ();
5776 if (new_main_name
!= NULL
)
5778 set_main_name (new_main_name
, language_pascal
);
5782 /* The languages above didn't identify the name of the main procedure.
5783 Fallback to "main". */
5784 set_main_name ("main", language_unknown
);
5790 struct main_info
*info
= get_main_info ();
5792 if (info
->name_of_main
== NULL
)
5795 return info
->name_of_main
;
5798 /* Return the language of the main function. If it is not known,
5799 return language_unknown. */
5802 main_language (void)
5804 struct main_info
*info
= get_main_info ();
5806 if (info
->name_of_main
== NULL
)
5809 return info
->language_of_main
;
5812 /* Handle ``executable_changed'' events for the symtab module. */
5815 symtab_observer_executable_changed (void)
5817 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5818 set_main_name (NULL
, language_unknown
);
5821 /* Return 1 if the supplied producer string matches the ARM RealView
5822 compiler (armcc). */
5825 producer_is_realview (const char *producer
)
5827 static const char *const arm_idents
[] = {
5828 "ARM C Compiler, ADS",
5829 "Thumb C Compiler, ADS",
5830 "ARM C++ Compiler, ADS",
5831 "Thumb C++ Compiler, ADS",
5832 "ARM/Thumb C/C++ Compiler, RVCT",
5833 "ARM C/C++ Compiler, RVCT"
5837 if (producer
== NULL
)
5840 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5841 if (startswith (producer
, arm_idents
[i
]))
5849 /* The next index to hand out in response to a registration request. */
5851 static int next_aclass_value
= LOC_FINAL_VALUE
;
5853 /* The maximum number of "aclass" registrations we support. This is
5854 constant for convenience. */
5855 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5857 /* The objects representing the various "aclass" values. The elements
5858 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5859 elements are those registered at gdb initialization time. */
5861 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
5863 /* The globally visible pointer. This is separate from 'symbol_impl'
5864 so that it can be const. */
5866 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
5868 /* Make sure we saved enough room in struct symbol. */
5870 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
5872 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5873 is the ops vector associated with this index. This returns the new
5874 index, which should be used as the aclass_index field for symbols
5878 register_symbol_computed_impl (enum address_class aclass
,
5879 const struct symbol_computed_ops
*ops
)
5881 int result
= next_aclass_value
++;
5883 gdb_assert (aclass
== LOC_COMPUTED
);
5884 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5885 symbol_impl
[result
].aclass
= aclass
;
5886 symbol_impl
[result
].ops_computed
= ops
;
5888 /* Sanity check OPS. */
5889 gdb_assert (ops
!= NULL
);
5890 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
5891 gdb_assert (ops
->describe_location
!= NULL
);
5892 gdb_assert (ops
->get_symbol_read_needs
!= NULL
);
5893 gdb_assert (ops
->read_variable
!= NULL
);
5898 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5899 OPS is the ops vector associated with this index. This returns the
5900 new index, which should be used as the aclass_index field for symbols
5904 register_symbol_block_impl (enum address_class aclass
,
5905 const struct symbol_block_ops
*ops
)
5907 int result
= next_aclass_value
++;
5909 gdb_assert (aclass
== LOC_BLOCK
);
5910 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5911 symbol_impl
[result
].aclass
= aclass
;
5912 symbol_impl
[result
].ops_block
= ops
;
5914 /* Sanity check OPS. */
5915 gdb_assert (ops
!= NULL
);
5916 gdb_assert (ops
->find_frame_base_location
!= NULL
);
5921 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5922 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5923 this index. This returns the new index, which should be used as
5924 the aclass_index field for symbols of this type. */
5927 register_symbol_register_impl (enum address_class aclass
,
5928 const struct symbol_register_ops
*ops
)
5930 int result
= next_aclass_value
++;
5932 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
5933 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5934 symbol_impl
[result
].aclass
= aclass
;
5935 symbol_impl
[result
].ops_register
= ops
;
5940 /* Initialize elements of 'symbol_impl' for the constants in enum
5944 initialize_ordinary_address_classes (void)
5948 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
5949 symbol_impl
[i
].aclass
= (enum address_class
) i
;
5954 /* Helper function to initialize the fields of an objfile-owned symbol.
5955 It assumed that *SYM is already all zeroes. */
5958 initialize_objfile_symbol_1 (struct symbol
*sym
)
5960 SYMBOL_OBJFILE_OWNED (sym
) = 1;
5961 SYMBOL_SECTION (sym
) = -1;
5964 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
5967 initialize_objfile_symbol (struct symbol
*sym
)
5969 memset (sym
, 0, sizeof (*sym
));
5970 initialize_objfile_symbol_1 (sym
);
5973 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
5977 allocate_symbol (struct objfile
*objfile
)
5979 struct symbol
*result
;
5981 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5982 initialize_objfile_symbol_1 (result
);
5987 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
5990 struct template_symbol
*
5991 allocate_template_symbol (struct objfile
*objfile
)
5993 struct template_symbol
*result
;
5995 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
5996 initialize_objfile_symbol_1 (&result
->base
);
6004 symbol_objfile (const struct symbol
*symbol
)
6006 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6007 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6013 symbol_arch (const struct symbol
*symbol
)
6015 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6016 return symbol
->owner
.arch
;
6017 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6023 symbol_symtab (const struct symbol
*symbol
)
6025 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6026 return symbol
->owner
.symtab
;
6032 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6034 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6035 symbol
->owner
.symtab
= symtab
;
6041 _initialize_symtab (void)
6043 initialize_ordinary_address_classes ();
6046 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6049 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6051 add_info ("variables", variables_info
, _("\
6052 All global and static variable names, or those matching REGEXP."));
6054 add_com ("whereis", class_info
, variables_info
, _("\
6055 All global and static variable names, or those matching REGEXP."));
6057 add_info ("functions", functions_info
,
6058 _("All function names, or those matching REGEXP."));
6060 /* FIXME: This command has at least the following problems:
6061 1. It prints builtin types (in a very strange and confusing fashion).
6062 2. It doesn't print right, e.g. with
6063 typedef struct foo *FOO
6064 type_print prints "FOO" when we want to make it (in this situation)
6065 print "struct foo *".
6066 I also think "ptype" or "whatis" is more likely to be useful (but if
6067 there is much disagreement "info types" can be fixed). */
6068 add_info ("types", types_info
,
6069 _("All type names, or those matching REGEXP."));
6071 add_info ("sources", sources_info
,
6072 _("Source files in the program."));
6074 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6075 _("Set a breakpoint for all functions matching REGEXP."));
6077 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6078 multiple_symbols_modes
, &multiple_symbols_mode
,
6080 Set the debugger behavior when more than one symbol are possible matches\n\
6081 in an expression."), _("\
6082 Show how the debugger handles ambiguities in expressions."), _("\
6083 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6084 NULL
, NULL
, &setlist
, &showlist
);
6086 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6087 &basenames_may_differ
, _("\
6088 Set whether a source file may have multiple base names."), _("\
6089 Show whether a source file may have multiple base names."), _("\
6090 (A \"base name\" is the name of a file with the directory part removed.\n\
6091 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6092 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6093 before comparing them. Canonicalization is an expensive operation,\n\
6094 but it allows the same file be known by more than one base name.\n\
6095 If not set (the default), all source files are assumed to have just\n\
6096 one base name, and gdb will do file name comparisons more efficiently."),
6098 &setlist
, &showlist
);
6100 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6101 _("Set debugging of symbol table creation."),
6102 _("Show debugging of symbol table creation."), _("\
6103 When enabled (non-zero), debugging messages are printed when building\n\
6104 symbol tables. A value of 1 (one) normally provides enough information.\n\
6105 A value greater than 1 provides more verbose information."),
6108 &setdebuglist
, &showdebuglist
);
6110 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6112 Set debugging of symbol lookup."), _("\
6113 Show debugging of symbol lookup."), _("\
6114 When enabled (non-zero), symbol lookups are logged."),
6116 &setdebuglist
, &showdebuglist
);
6118 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6119 &new_symbol_cache_size
,
6120 _("Set the size of the symbol cache."),
6121 _("Show the size of the symbol cache."), _("\
6122 The size of the symbol cache.\n\
6123 If zero then the symbol cache is disabled."),
6124 set_symbol_cache_size_handler
, NULL
,
6125 &maintenance_set_cmdlist
,
6126 &maintenance_show_cmdlist
);
6128 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6129 _("Dump the symbol cache for each program space."),
6130 &maintenanceprintlist
);
6132 add_cmd ("symbol-cache-statistics", class_maintenance
,
6133 maintenance_print_symbol_cache_statistics
,
6134 _("Print symbol cache statistics for each program space."),
6135 &maintenanceprintlist
);
6137 add_cmd ("flush-symbol-cache", class_maintenance
,
6138 maintenance_flush_symbol_cache
,
6139 _("Flush the symbol cache for each program space."),
6142 observer_attach_executable_changed (symtab_observer_executable_changed
);
6143 observer_attach_new_objfile (symtab_new_objfile_observer
);
6144 observer_attach_free_objfile (symtab_free_objfile_observer
);