1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2004, 2007-2012 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"
46 #include "gdb_obstack.h"
48 #include "dictionary.h"
50 #include <sys/types.h>
52 #include "gdb_string.h"
56 #include "cp-support.h"
58 #include "gdb_assert.h"
61 #include "macroscope.h"
64 #include "parser-defs.h"
66 /* Prototypes for local functions */
68 static void rbreak_command (char *, int);
70 static void types_info (char *, int);
72 static void functions_info (char *, int);
74 static void variables_info (char *, int);
76 static void sources_info (char *, int);
78 static int find_line_common (struct linetable
*, int, int *, int);
80 static struct symbol
*lookup_symbol_aux (const char *name
,
81 const struct block
*block
,
82 const domain_enum domain
,
83 enum language language
,
84 struct field_of_this_result
*is_a_field_of_this
);
87 struct symbol
*lookup_symbol_aux_local (const char *name
,
88 const struct block
*block
,
89 const domain_enum domain
,
90 enum language language
);
93 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
95 const domain_enum domain
);
98 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
101 const domain_enum domain
);
103 static void print_msymbol_info (struct minimal_symbol
*);
105 void _initialize_symtab (void);
109 /* When non-zero, print debugging messages related to symtab creation. */
110 int symtab_create_debug
= 0;
112 /* Non-zero if a file may be known by two different basenames.
113 This is the uncommon case, and significantly slows down gdb.
114 Default set to "off" to not slow down the common case. */
115 int basenames_may_differ
= 0;
117 /* Allow the user to configure the debugger behavior with respect
118 to multiple-choice menus when more than one symbol matches during
121 const char multiple_symbols_ask
[] = "ask";
122 const char multiple_symbols_all
[] = "all";
123 const char multiple_symbols_cancel
[] = "cancel";
124 static const char *const multiple_symbols_modes
[] =
126 multiple_symbols_ask
,
127 multiple_symbols_all
,
128 multiple_symbols_cancel
,
131 static const char *multiple_symbols_mode
= multiple_symbols_all
;
133 /* Read-only accessor to AUTO_SELECT_MODE. */
136 multiple_symbols_select_mode (void)
138 return multiple_symbols_mode
;
141 /* Block in which the most recently searched-for symbol was found.
142 Might be better to make this a parameter to lookup_symbol and
145 const struct block
*block_found
;
147 /* See whether FILENAME matches SEARCH_NAME using the rule that we
148 advertise to the user. (The manual's description of linespecs
149 describes what we advertise). We assume that SEARCH_NAME is
150 a relative path. Returns true if they match, false otherwise. */
153 compare_filenames_for_search (const char *filename
, const char *search_name
)
155 int len
= strlen (filename
);
156 size_t search_len
= strlen (search_name
);
158 if (len
< search_len
)
161 /* The tail of FILENAME must match. */
162 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
165 /* Either the names must completely match, or the character
166 preceding the trailing SEARCH_NAME segment of FILENAME must be a
167 directory separator. */
168 return (len
== search_len
169 || IS_DIR_SEPARATOR (filename
[len
- search_len
- 1])
170 || (HAS_DRIVE_SPEC (filename
)
171 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
174 /* Check for a symtab of a specific name by searching some symtabs.
175 This is a helper function for callbacks of iterate_over_symtabs.
177 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
178 are identical to the `map_symtabs_matching_filename' method of
179 quick_symbol_functions.
181 FIRST and AFTER_LAST indicate the range of symtabs to search.
182 AFTER_LAST is one past the last symtab to search; NULL means to
183 search until the end of the list. */
186 iterate_over_some_symtabs (const char *name
,
187 const char *full_path
,
188 const char *real_path
,
189 int (*callback
) (struct symtab
*symtab
,
192 struct symtab
*first
,
193 struct symtab
*after_last
)
195 struct symtab
*s
= NULL
;
196 const char* base_name
= lbasename (name
);
197 int is_abs
= IS_ABSOLUTE_PATH (name
);
199 for (s
= first
; s
!= NULL
&& s
!= after_last
; s
= s
->next
)
201 /* Exact match is always ok. */
202 if (FILENAME_CMP (name
, s
->filename
) == 0)
204 if (callback (s
, data
))
208 if (!is_abs
&& compare_filenames_for_search (s
->filename
, name
))
210 if (callback (s
, data
))
214 /* Before we invoke realpath, which can get expensive when many
215 files are involved, do a quick comparison of the basenames. */
216 if (! basenames_may_differ
217 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
220 /* If the user gave us an absolute path, try to find the file in
221 this symtab and use its absolute path. */
223 if (full_path
!= NULL
)
225 const char *fp
= symtab_to_fullname (s
);
227 if (FILENAME_CMP (full_path
, fp
) == 0)
229 if (callback (s
, data
))
233 if (!is_abs
&& compare_filenames_for_search (fp
, name
))
235 if (callback (s
, data
))
240 if (real_path
!= NULL
)
242 const char *fullname
= symtab_to_fullname (s
);
243 char *rp
= gdb_realpath (fullname
);
245 make_cleanup (xfree
, rp
);
246 if (FILENAME_CMP (real_path
, rp
) == 0)
248 if (callback (s
, data
))
252 if (!is_abs
&& compare_filenames_for_search (rp
, name
))
254 if (callback (s
, data
))
263 /* Check for a symtab of a specific name; first in symtabs, then in
264 psymtabs. *If* there is no '/' in the name, a match after a '/'
265 in the symtab filename will also work.
267 Calls CALLBACK with each symtab that is found and with the supplied
268 DATA. If CALLBACK returns true, the search stops. */
271 iterate_over_symtabs (const char *name
,
272 int (*callback
) (struct symtab
*symtab
,
276 struct symtab
*s
= NULL
;
277 struct objfile
*objfile
;
278 char *real_path
= NULL
;
279 char *full_path
= NULL
;
280 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
282 /* Here we are interested in canonicalizing an absolute path, not
283 absolutizing a relative path. */
284 if (IS_ABSOLUTE_PATH (name
))
286 full_path
= xfullpath (name
);
287 make_cleanup (xfree
, full_path
);
288 real_path
= gdb_realpath (name
);
289 make_cleanup (xfree
, real_path
);
292 ALL_OBJFILES (objfile
)
294 if (iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
295 objfile
->symtabs
, NULL
))
297 do_cleanups (cleanups
);
302 /* Same search rules as above apply here, but now we look thru the
305 ALL_OBJFILES (objfile
)
308 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
315 do_cleanups (cleanups
);
320 do_cleanups (cleanups
);
323 /* The callback function used by lookup_symtab. */
326 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
328 struct symtab
**result_ptr
= data
;
330 *result_ptr
= symtab
;
334 /* A wrapper for iterate_over_symtabs that returns the first matching
338 lookup_symtab (const char *name
)
340 struct symtab
*result
= NULL
;
342 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
347 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
348 full method name, which consist of the class name (from T), the unadorned
349 method name from METHOD_ID, and the signature for the specific overload,
350 specified by SIGNATURE_ID. Note that this function is g++ specific. */
353 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
355 int mangled_name_len
;
357 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
358 struct fn_field
*method
= &f
[signature_id
];
359 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
360 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
361 const char *newname
= type_name_no_tag (type
);
363 /* Does the form of physname indicate that it is the full mangled name
364 of a constructor (not just the args)? */
365 int is_full_physname_constructor
;
368 int is_destructor
= is_destructor_name (physname
);
369 /* Need a new type prefix. */
370 char *const_prefix
= method
->is_const
? "C" : "";
371 char *volatile_prefix
= method
->is_volatile
? "V" : "";
373 int len
= (newname
== NULL
? 0 : strlen (newname
));
375 /* Nothing to do if physname already contains a fully mangled v3 abi name
376 or an operator name. */
377 if ((physname
[0] == '_' && physname
[1] == 'Z')
378 || is_operator_name (field_name
))
379 return xstrdup (physname
);
381 is_full_physname_constructor
= is_constructor_name (physname
);
383 is_constructor
= is_full_physname_constructor
384 || (newname
&& strcmp (field_name
, newname
) == 0);
387 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
389 if (is_destructor
|| is_full_physname_constructor
)
391 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
392 strcpy (mangled_name
, physname
);
398 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
400 else if (physname
[0] == 't' || physname
[0] == 'Q')
402 /* The physname for template and qualified methods already includes
404 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
410 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
411 volatile_prefix
, len
);
413 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
414 + strlen (buf
) + len
+ strlen (physname
) + 1);
416 mangled_name
= (char *) xmalloc (mangled_name_len
);
418 mangled_name
[0] = '\0';
420 strcpy (mangled_name
, field_name
);
422 strcat (mangled_name
, buf
);
423 /* If the class doesn't have a name, i.e. newname NULL, then we just
424 mangle it using 0 for the length of the class. Thus it gets mangled
425 as something starting with `::' rather than `classname::'. */
427 strcat (mangled_name
, newname
);
429 strcat (mangled_name
, physname
);
430 return (mangled_name
);
433 /* Initialize the cplus_specific structure. 'cplus_specific' should
434 only be allocated for use with cplus symbols. */
437 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
438 struct objfile
*objfile
)
440 /* A language_specific structure should not have been previously
442 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
443 gdb_assert (objfile
!= NULL
);
445 gsymbol
->language_specific
.cplus_specific
=
446 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
449 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
450 correctly allocated. For C++ symbols a cplus_specific struct is
451 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
452 OBJFILE can be NULL. */
455 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
457 struct objfile
*objfile
)
459 if (gsymbol
->language
== language_cplus
)
461 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
462 symbol_init_cplus_specific (gsymbol
, objfile
);
464 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
467 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
470 /* Return the demangled name of GSYMBOL. */
473 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
475 if (gsymbol
->language
== language_cplus
)
477 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
478 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
483 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
487 /* Initialize the language dependent portion of a symbol
488 depending upon the language for the symbol. */
491 symbol_set_language (struct general_symbol_info
*gsymbol
,
492 enum language language
)
494 gsymbol
->language
= language
;
495 if (gsymbol
->language
== language_d
496 || gsymbol
->language
== language_go
497 || gsymbol
->language
== language_java
498 || gsymbol
->language
== language_objc
499 || gsymbol
->language
== language_fortran
)
501 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
503 else if (gsymbol
->language
== language_cplus
)
504 gsymbol
->language_specific
.cplus_specific
= NULL
;
507 memset (&gsymbol
->language_specific
, 0,
508 sizeof (gsymbol
->language_specific
));
512 /* Functions to initialize a symbol's mangled name. */
514 /* Objects of this type are stored in the demangled name hash table. */
515 struct demangled_name_entry
521 /* Hash function for the demangled name hash. */
524 hash_demangled_name_entry (const void *data
)
526 const struct demangled_name_entry
*e
= data
;
528 return htab_hash_string (e
->mangled
);
531 /* Equality function for the demangled name hash. */
534 eq_demangled_name_entry (const void *a
, const void *b
)
536 const struct demangled_name_entry
*da
= a
;
537 const struct demangled_name_entry
*db
= b
;
539 return strcmp (da
->mangled
, db
->mangled
) == 0;
542 /* Create the hash table used for demangled names. Each hash entry is
543 a pair of strings; one for the mangled name and one for the demangled
544 name. The entry is hashed via just the mangled name. */
547 create_demangled_names_hash (struct objfile
*objfile
)
549 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
550 The hash table code will round this up to the next prime number.
551 Choosing a much larger table size wastes memory, and saves only about
552 1% in symbol reading. */
554 objfile
->demangled_names_hash
= htab_create_alloc
555 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
556 NULL
, xcalloc
, xfree
);
559 /* Try to determine the demangled name for a symbol, based on the
560 language of that symbol. If the language is set to language_auto,
561 it will attempt to find any demangling algorithm that works and
562 then set the language appropriately. The returned name is allocated
563 by the demangler and should be xfree'd. */
566 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
569 char *demangled
= NULL
;
571 if (gsymbol
->language
== language_unknown
)
572 gsymbol
->language
= language_auto
;
574 if (gsymbol
->language
== language_objc
575 || gsymbol
->language
== language_auto
)
578 objc_demangle (mangled
, 0);
579 if (demangled
!= NULL
)
581 gsymbol
->language
= language_objc
;
585 if (gsymbol
->language
== language_cplus
586 || gsymbol
->language
== language_auto
)
589 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
590 if (demangled
!= NULL
)
592 gsymbol
->language
= language_cplus
;
596 if (gsymbol
->language
== language_java
)
599 cplus_demangle (mangled
,
600 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
601 if (demangled
!= NULL
)
603 gsymbol
->language
= language_java
;
607 if (gsymbol
->language
== language_d
608 || gsymbol
->language
== language_auto
)
610 demangled
= d_demangle(mangled
, 0);
611 if (demangled
!= NULL
)
613 gsymbol
->language
= language_d
;
617 /* FIXME(dje): Continually adding languages here is clumsy.
618 Better to just call la_demangle if !auto, and if auto then call
619 a utility routine that tries successive languages in turn and reports
620 which one it finds. I realize the la_demangle options may be different
621 for different languages but there's already a FIXME for that. */
622 if (gsymbol
->language
== language_go
623 || gsymbol
->language
== language_auto
)
625 demangled
= go_demangle (mangled
, 0);
626 if (demangled
!= NULL
)
628 gsymbol
->language
= language_go
;
633 /* We could support `gsymbol->language == language_fortran' here to provide
634 module namespaces also for inferiors with only minimal symbol table (ELF
635 symbols). Just the mangling standard is not standardized across compilers
636 and there is no DW_AT_producer available for inferiors with only the ELF
637 symbols to check the mangling kind. */
641 /* Set both the mangled and demangled (if any) names for GSYMBOL based
642 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
643 objfile's obstack; but if COPY_NAME is 0 and if NAME is
644 NUL-terminated, then this function assumes that NAME is already
645 correctly saved (either permanently or with a lifetime tied to the
646 objfile), and it will not be copied.
648 The hash table corresponding to OBJFILE is used, and the memory
649 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
650 so the pointer can be discarded after calling this function. */
652 /* We have to be careful when dealing with Java names: when we run
653 into a Java minimal symbol, we don't know it's a Java symbol, so it
654 gets demangled as a C++ name. This is unfortunate, but there's not
655 much we can do about it: but when demangling partial symbols and
656 regular symbols, we'd better not reuse the wrong demangled name.
657 (See PR gdb/1039.) We solve this by putting a distinctive prefix
658 on Java names when storing them in the hash table. */
660 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
661 don't mind the Java prefix so much: different languages have
662 different demangling requirements, so it's only natural that we
663 need to keep language data around in our demangling cache. But
664 it's not good that the minimal symbol has the wrong demangled name.
665 Unfortunately, I can't think of any easy solution to that
668 #define JAVA_PREFIX "##JAVA$$"
669 #define JAVA_PREFIX_LEN 8
672 symbol_set_names (struct general_symbol_info
*gsymbol
,
673 const char *linkage_name
, int len
, int copy_name
,
674 struct objfile
*objfile
)
676 struct demangled_name_entry
**slot
;
677 /* A 0-terminated copy of the linkage name. */
678 const char *linkage_name_copy
;
679 /* A copy of the linkage name that might have a special Java prefix
680 added to it, for use when looking names up in the hash table. */
681 const char *lookup_name
;
682 /* The length of lookup_name. */
684 struct demangled_name_entry entry
;
686 if (gsymbol
->language
== language_ada
)
688 /* In Ada, we do the symbol lookups using the mangled name, so
689 we can save some space by not storing the demangled name.
691 As a side note, we have also observed some overlap between
692 the C++ mangling and Ada mangling, similarly to what has
693 been observed with Java. Because we don't store the demangled
694 name with the symbol, we don't need to use the same trick
697 gsymbol
->name
= linkage_name
;
700 char *name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
702 memcpy (name
, linkage_name
, len
);
704 gsymbol
->name
= name
;
706 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
711 if (objfile
->demangled_names_hash
== NULL
)
712 create_demangled_names_hash (objfile
);
714 /* The stabs reader generally provides names that are not
715 NUL-terminated; most of the other readers don't do this, so we
716 can just use the given copy, unless we're in the Java case. */
717 if (gsymbol
->language
== language_java
)
721 lookup_len
= len
+ JAVA_PREFIX_LEN
;
722 alloc_name
= alloca (lookup_len
+ 1);
723 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
724 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
725 alloc_name
[lookup_len
] = '\0';
727 lookup_name
= alloc_name
;
728 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
730 else if (linkage_name
[len
] != '\0')
735 alloc_name
= alloca (lookup_len
+ 1);
736 memcpy (alloc_name
, linkage_name
, len
);
737 alloc_name
[lookup_len
] = '\0';
739 lookup_name
= alloc_name
;
740 linkage_name_copy
= alloc_name
;
745 lookup_name
= linkage_name
;
746 linkage_name_copy
= linkage_name
;
749 entry
.mangled
= (char *) lookup_name
;
750 slot
= ((struct demangled_name_entry
**)
751 htab_find_slot (objfile
->demangled_names_hash
,
754 /* If this name is not in the hash table, add it. */
756 /* A C version of the symbol may have already snuck into the table.
757 This happens to, e.g., main.init (__go_init_main). Cope. */
758 || (gsymbol
->language
== language_go
759 && (*slot
)->demangled
[0] == '\0'))
761 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
763 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
765 /* Suppose we have demangled_name==NULL, copy_name==0, and
766 lookup_name==linkage_name. In this case, we already have the
767 mangled name saved, and we don't have a demangled name. So,
768 you might think we could save a little space by not recording
769 this in the hash table at all.
771 It turns out that it is actually important to still save such
772 an entry in the hash table, because storing this name gives
773 us better bcache hit rates for partial symbols. */
774 if (!copy_name
&& lookup_name
== linkage_name
)
776 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
777 offsetof (struct demangled_name_entry
,
779 + demangled_len
+ 1);
780 (*slot
)->mangled
= (char *) lookup_name
;
784 /* If we must copy the mangled name, put it directly after
785 the demangled name so we can have a single
787 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
788 offsetof (struct demangled_name_entry
,
790 + lookup_len
+ demangled_len
+ 2);
791 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
792 strcpy ((*slot
)->mangled
, lookup_name
);
795 if (demangled_name
!= NULL
)
797 strcpy ((*slot
)->demangled
, demangled_name
);
798 xfree (demangled_name
);
801 (*slot
)->demangled
[0] = '\0';
804 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
805 if ((*slot
)->demangled
[0] != '\0')
806 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
808 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
811 /* Return the source code name of a symbol. In languages where
812 demangling is necessary, this is the demangled name. */
815 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
817 switch (gsymbol
->language
)
824 case language_fortran
:
825 if (symbol_get_demangled_name (gsymbol
) != NULL
)
826 return symbol_get_demangled_name (gsymbol
);
829 if (symbol_get_demangled_name (gsymbol
) != NULL
)
830 return symbol_get_demangled_name (gsymbol
);
832 return ada_decode_symbol (gsymbol
);
837 return gsymbol
->name
;
840 /* Return the demangled name for a symbol based on the language for
841 that symbol. If no demangled name exists, return NULL. */
844 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
846 const char *dem_name
= NULL
;
848 switch (gsymbol
->language
)
855 case language_fortran
:
856 dem_name
= symbol_get_demangled_name (gsymbol
);
859 dem_name
= symbol_get_demangled_name (gsymbol
);
860 if (dem_name
== NULL
)
861 dem_name
= ada_decode_symbol (gsymbol
);
869 /* Return the search name of a symbol---generally the demangled or
870 linkage name of the symbol, depending on how it will be searched for.
871 If there is no distinct demangled name, then returns the same value
872 (same pointer) as SYMBOL_LINKAGE_NAME. */
875 symbol_search_name (const struct general_symbol_info
*gsymbol
)
877 if (gsymbol
->language
== language_ada
)
878 return gsymbol
->name
;
880 return symbol_natural_name (gsymbol
);
883 /* Initialize the structure fields to zero values. */
886 init_sal (struct symtab_and_line
*sal
)
894 sal
->explicit_pc
= 0;
895 sal
->explicit_line
= 0;
900 /* Return 1 if the two sections are the same, or if they could
901 plausibly be copies of each other, one in an original object
902 file and another in a separated debug file. */
905 matching_obj_sections (struct obj_section
*obj_first
,
906 struct obj_section
*obj_second
)
908 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
909 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
912 /* If they're the same section, then they match. */
916 /* If either is NULL, give up. */
917 if (first
== NULL
|| second
== NULL
)
920 /* This doesn't apply to absolute symbols. */
921 if (first
->owner
== NULL
|| second
->owner
== NULL
)
924 /* If they're in the same object file, they must be different sections. */
925 if (first
->owner
== second
->owner
)
928 /* Check whether the two sections are potentially corresponding. They must
929 have the same size, address, and name. We can't compare section indexes,
930 which would be more reliable, because some sections may have been
932 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
935 /* In-memory addresses may start at a different offset, relativize them. */
936 if (bfd_get_section_vma (first
->owner
, first
)
937 - bfd_get_start_address (first
->owner
)
938 != bfd_get_section_vma (second
->owner
, second
)
939 - bfd_get_start_address (second
->owner
))
942 if (bfd_get_section_name (first
->owner
, first
) == NULL
943 || bfd_get_section_name (second
->owner
, second
) == NULL
944 || strcmp (bfd_get_section_name (first
->owner
, first
),
945 bfd_get_section_name (second
->owner
, second
)) != 0)
948 /* Otherwise check that they are in corresponding objfiles. */
951 if (obj
->obfd
== first
->owner
)
953 gdb_assert (obj
!= NULL
);
955 if (obj
->separate_debug_objfile
!= NULL
956 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
958 if (obj
->separate_debug_objfile_backlink
!= NULL
959 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
966 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
968 struct objfile
*objfile
;
969 struct minimal_symbol
*msymbol
;
971 /* If we know that this is not a text address, return failure. This is
972 necessary because we loop based on texthigh and textlow, which do
973 not include the data ranges. */
974 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
976 && (MSYMBOL_TYPE (msymbol
) == mst_data
977 || MSYMBOL_TYPE (msymbol
) == mst_bss
978 || MSYMBOL_TYPE (msymbol
) == mst_abs
979 || MSYMBOL_TYPE (msymbol
) == mst_file_data
980 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
983 ALL_OBJFILES (objfile
)
985 struct symtab
*result
= NULL
;
988 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
997 /* Debug symbols usually don't have section information. We need to dig that
998 out of the minimal symbols and stash that in the debug symbol. */
1001 fixup_section (struct general_symbol_info
*ginfo
,
1002 CORE_ADDR addr
, struct objfile
*objfile
)
1004 struct minimal_symbol
*msym
;
1006 /* First, check whether a minimal symbol with the same name exists
1007 and points to the same address. The address check is required
1008 e.g. on PowerPC64, where the minimal symbol for a function will
1009 point to the function descriptor, while the debug symbol will
1010 point to the actual function code. */
1011 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1014 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
1015 ginfo
->section
= SYMBOL_SECTION (msym
);
1019 /* Static, function-local variables do appear in the linker
1020 (minimal) symbols, but are frequently given names that won't
1021 be found via lookup_minimal_symbol(). E.g., it has been
1022 observed in frv-uclinux (ELF) executables that a static,
1023 function-local variable named "foo" might appear in the
1024 linker symbols as "foo.6" or "foo.3". Thus, there is no
1025 point in attempting to extend the lookup-by-name mechanism to
1026 handle this case due to the fact that there can be multiple
1029 So, instead, search the section table when lookup by name has
1030 failed. The ``addr'' and ``endaddr'' fields may have already
1031 been relocated. If so, the relocation offset (i.e. the
1032 ANOFFSET value) needs to be subtracted from these values when
1033 performing the comparison. We unconditionally subtract it,
1034 because, when no relocation has been performed, the ANOFFSET
1035 value will simply be zero.
1037 The address of the symbol whose section we're fixing up HAS
1038 NOT BEEN adjusted (relocated) yet. It can't have been since
1039 the section isn't yet known and knowing the section is
1040 necessary in order to add the correct relocation value. In
1041 other words, we wouldn't even be in this function (attempting
1042 to compute the section) if it were already known.
1044 Note that it is possible to search the minimal symbols
1045 (subtracting the relocation value if necessary) to find the
1046 matching minimal symbol, but this is overkill and much less
1047 efficient. It is not necessary to find the matching minimal
1048 symbol, only its section.
1050 Note that this technique (of doing a section table search)
1051 can fail when unrelocated section addresses overlap. For
1052 this reason, we still attempt a lookup by name prior to doing
1053 a search of the section table. */
1055 struct obj_section
*s
;
1057 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1059 int idx
= s
->the_bfd_section
->index
;
1060 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1062 if (obj_section_addr (s
) - offset
<= addr
1063 && addr
< obj_section_endaddr (s
) - offset
)
1065 ginfo
->obj_section
= s
;
1066 ginfo
->section
= idx
;
1074 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1081 if (SYMBOL_OBJ_SECTION (sym
))
1084 /* We either have an OBJFILE, or we can get at it from the sym's
1085 symtab. Anything else is a bug. */
1086 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1088 if (objfile
== NULL
)
1089 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1091 /* We should have an objfile by now. */
1092 gdb_assert (objfile
);
1094 switch (SYMBOL_CLASS (sym
))
1098 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1101 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1105 /* Nothing else will be listed in the minsyms -- no use looking
1110 fixup_section (&sym
->ginfo
, addr
, objfile
);
1115 /* Compute the demangled form of NAME as used by the various symbol
1116 lookup functions. The result is stored in *RESULT_NAME. Returns a
1117 cleanup which can be used to clean up the result.
1119 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1120 Normally, Ada symbol lookups are performed using the encoded name
1121 rather than the demangled name, and so it might seem to make sense
1122 for this function to return an encoded version of NAME.
1123 Unfortunately, we cannot do this, because this function is used in
1124 circumstances where it is not appropriate to try to encode NAME.
1125 For instance, when displaying the frame info, we demangle the name
1126 of each parameter, and then perform a symbol lookup inside our
1127 function using that demangled name. In Ada, certain functions
1128 have internally-generated parameters whose name contain uppercase
1129 characters. Encoding those name would result in those uppercase
1130 characters to become lowercase, and thus cause the symbol lookup
1134 demangle_for_lookup (const char *name
, enum language lang
,
1135 const char **result_name
)
1137 char *demangled_name
= NULL
;
1138 const char *modified_name
= NULL
;
1139 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1141 modified_name
= name
;
1143 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1144 lookup, so we can always binary search. */
1145 if (lang
== language_cplus
)
1147 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1150 modified_name
= demangled_name
;
1151 make_cleanup (xfree
, demangled_name
);
1155 /* If we were given a non-mangled name, canonicalize it
1156 according to the language (so far only for C++). */
1157 demangled_name
= cp_canonicalize_string (name
);
1160 modified_name
= demangled_name
;
1161 make_cleanup (xfree
, demangled_name
);
1165 else if (lang
== language_java
)
1167 demangled_name
= cplus_demangle (name
,
1168 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1171 modified_name
= demangled_name
;
1172 make_cleanup (xfree
, demangled_name
);
1175 else if (lang
== language_d
)
1177 demangled_name
= d_demangle (name
, 0);
1180 modified_name
= demangled_name
;
1181 make_cleanup (xfree
, demangled_name
);
1184 else if (lang
== language_go
)
1186 demangled_name
= go_demangle (name
, 0);
1189 modified_name
= demangled_name
;
1190 make_cleanup (xfree
, demangled_name
);
1194 *result_name
= modified_name
;
1198 /* Find the definition for a specified symbol name NAME
1199 in domain DOMAIN, visible from lexical block BLOCK.
1200 Returns the struct symbol pointer, or zero if no symbol is found.
1201 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1202 NAME is a field of the current implied argument `this'. If so set
1203 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1204 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1205 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1207 /* This function (or rather its subordinates) have a bunch of loops and
1208 it would seem to be attractive to put in some QUIT's (though I'm not really
1209 sure whether it can run long enough to be really important). But there
1210 are a few calls for which it would appear to be bad news to quit
1211 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1212 that there is C++ code below which can error(), but that probably
1213 doesn't affect these calls since they are looking for a known
1214 variable and thus can probably assume it will never hit the C++
1218 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1219 const domain_enum domain
, enum language lang
,
1220 struct field_of_this_result
*is_a_field_of_this
)
1222 const char *modified_name
;
1223 struct symbol
*returnval
;
1224 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1226 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1227 is_a_field_of_this
);
1228 do_cleanups (cleanup
);
1233 /* Behave like lookup_symbol_in_language, but performed with the
1234 current language. */
1237 lookup_symbol (const char *name
, const struct block
*block
,
1239 struct field_of_this_result
*is_a_field_of_this
)
1241 return lookup_symbol_in_language (name
, block
, domain
,
1242 current_language
->la_language
,
1243 is_a_field_of_this
);
1246 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1247 found, or NULL if not found. */
1250 lookup_language_this (const struct language_defn
*lang
,
1251 const struct block
*block
)
1253 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1260 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1263 block_found
= block
;
1266 if (BLOCK_FUNCTION (block
))
1268 block
= BLOCK_SUPERBLOCK (block
);
1274 /* Given TYPE, a structure/union,
1275 return 1 if the component named NAME from the ultimate target
1276 structure/union is defined, otherwise, return 0. */
1279 check_field (struct type
*type
, const char *name
,
1280 struct field_of_this_result
*is_a_field_of_this
)
1284 /* The type may be a stub. */
1285 CHECK_TYPEDEF (type
);
1287 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1289 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1291 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1293 is_a_field_of_this
->type
= type
;
1294 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1299 /* C++: If it was not found as a data field, then try to return it
1300 as a pointer to a method. */
1302 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1304 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1306 is_a_field_of_this
->type
= type
;
1307 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1312 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1313 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
1319 /* Behave like lookup_symbol except that NAME is the natural name
1320 (e.g., demangled name) of the symbol that we're looking for. */
1322 static struct symbol
*
1323 lookup_symbol_aux (const char *name
, const struct block
*block
,
1324 const domain_enum domain
, enum language language
,
1325 struct field_of_this_result
*is_a_field_of_this
)
1328 const struct language_defn
*langdef
;
1330 /* Make sure we do something sensible with is_a_field_of_this, since
1331 the callers that set this parameter to some non-null value will
1332 certainly use it later. If we don't set it, the contents of
1333 is_a_field_of_this are undefined. */
1334 if (is_a_field_of_this
!= NULL
)
1335 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
1337 /* Search specified block and its superiors. Don't search
1338 STATIC_BLOCK or GLOBAL_BLOCK. */
1340 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1344 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1345 check to see if NAME is a field of `this'. */
1347 langdef
= language_def (language
);
1349 /* Don't do this check if we are searching for a struct. It will
1350 not be found by check_field, but will be found by other
1352 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
1354 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1358 struct type
*t
= sym
->type
;
1360 /* I'm not really sure that type of this can ever
1361 be typedefed; just be safe. */
1363 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1364 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1365 t
= TYPE_TARGET_TYPE (t
);
1367 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1368 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1369 error (_("Internal error: `%s' is not an aggregate"),
1370 langdef
->la_name_of_this
);
1372 if (check_field (t
, name
, is_a_field_of_this
))
1377 /* Now do whatever is appropriate for LANGUAGE to look
1378 up static and global variables. */
1380 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1384 /* Now search all static file-level symbols. Not strictly correct,
1385 but more useful than an error. */
1387 return lookup_static_symbol_aux (name
, domain
);
1390 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1391 first, then check the psymtabs. If a psymtab indicates the existence of the
1392 desired name as a file-level static, then do psymtab-to-symtab conversion on
1393 the fly and return the found symbol. */
1396 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1398 struct objfile
*objfile
;
1401 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1405 ALL_OBJFILES (objfile
)
1407 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1415 /* Check to see if the symbol is defined in BLOCK or its superiors.
1416 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1418 static struct symbol
*
1419 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1420 const domain_enum domain
,
1421 enum language language
)
1424 const struct block
*static_block
= block_static_block (block
);
1425 const char *scope
= block_scope (block
);
1427 /* Check if either no block is specified or it's a global block. */
1429 if (static_block
== NULL
)
1432 while (block
!= static_block
)
1434 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1438 if (language
== language_cplus
|| language
== language_fortran
)
1440 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1446 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1448 block
= BLOCK_SUPERBLOCK (block
);
1451 /* We've reached the edge of the function without finding a result. */
1456 /* Look up OBJFILE to BLOCK. */
1459 lookup_objfile_from_block (const struct block
*block
)
1461 struct objfile
*obj
;
1467 block
= block_global_block (block
);
1468 /* Go through SYMTABS. */
1469 ALL_SYMTABS (obj
, s
)
1470 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1472 if (obj
->separate_debug_objfile_backlink
)
1473 obj
= obj
->separate_debug_objfile_backlink
;
1481 /* Look up a symbol in a block; if found, fixup the symbol, and set
1482 block_found appropriately. */
1485 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1486 const domain_enum domain
)
1490 sym
= lookup_block_symbol (block
, name
, domain
);
1493 block_found
= block
;
1494 return fixup_symbol_section (sym
, NULL
);
1500 /* Check all global symbols in OBJFILE in symtabs and
1504 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1506 const domain_enum domain
)
1508 const struct objfile
*objfile
;
1510 struct blockvector
*bv
;
1511 const struct block
*block
;
1514 for (objfile
= main_objfile
;
1516 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1518 /* Go through symtabs. */
1519 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1521 bv
= BLOCKVECTOR (s
);
1522 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1523 sym
= lookup_block_symbol (block
, name
, domain
);
1526 block_found
= block
;
1527 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1531 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1540 /* Check to see if the symbol is defined in one of the OBJFILE's
1541 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1542 depending on whether or not we want to search global symbols or
1545 static struct symbol
*
1546 lookup_symbol_aux_objfile (struct objfile
*objfile
, int block_index
,
1547 const char *name
, const domain_enum domain
)
1549 struct symbol
*sym
= NULL
;
1550 struct blockvector
*bv
;
1551 const struct block
*block
;
1555 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, block_index
,
1558 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1560 bv
= BLOCKVECTOR (s
);
1561 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1562 sym
= lookup_block_symbol (block
, name
, domain
);
1565 block_found
= block
;
1566 return fixup_symbol_section (sym
, objfile
);
1573 /* Same as lookup_symbol_aux_objfile, except that it searches all
1574 objfiles. Return the first match found. */
1576 static struct symbol
*
1577 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1578 const domain_enum domain
)
1581 struct objfile
*objfile
;
1583 ALL_OBJFILES (objfile
)
1585 sym
= lookup_symbol_aux_objfile (objfile
, block_index
, name
, domain
);
1593 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1594 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1595 and all related objfiles. */
1597 static struct symbol
*
1598 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
1599 const char *linkage_name
,
1602 enum language lang
= current_language
->la_language
;
1603 const char *modified_name
;
1604 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
1606 struct objfile
*main_objfile
, *cur_objfile
;
1608 if (objfile
->separate_debug_objfile_backlink
)
1609 main_objfile
= objfile
->separate_debug_objfile_backlink
;
1611 main_objfile
= objfile
;
1613 for (cur_objfile
= main_objfile
;
1615 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
1619 sym
= lookup_symbol_aux_objfile (cur_objfile
, GLOBAL_BLOCK
,
1620 modified_name
, domain
);
1622 sym
= lookup_symbol_aux_objfile (cur_objfile
, STATIC_BLOCK
,
1623 modified_name
, domain
);
1626 do_cleanups (cleanup
);
1631 do_cleanups (cleanup
);
1635 /* A helper function for lookup_symbol_aux that interfaces with the
1636 "quick" symbol table functions. */
1638 static struct symbol
*
1639 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1640 const char *name
, const domain_enum domain
)
1642 struct symtab
*symtab
;
1643 struct blockvector
*bv
;
1644 const struct block
*block
;
1649 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1653 bv
= BLOCKVECTOR (symtab
);
1654 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1655 sym
= lookup_block_symbol (block
, name
, domain
);
1658 /* This shouldn't be necessary, but as a last resort try
1659 looking in the statics even though the psymtab claimed
1660 the symbol was global, or vice-versa. It's possible
1661 that the psymtab gets it wrong in some cases. */
1663 /* FIXME: carlton/2002-09-30: Should we really do that?
1664 If that happens, isn't it likely to be a GDB error, in
1665 which case we should fix the GDB error rather than
1666 silently dealing with it here? So I'd vote for
1667 removing the check for the symbol in the other
1669 block
= BLOCKVECTOR_BLOCK (bv
,
1670 kind
== GLOBAL_BLOCK
?
1671 STATIC_BLOCK
: GLOBAL_BLOCK
);
1672 sym
= lookup_block_symbol (block
, name
, domain
);
1675 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1676 %s may be an inlined function, or may be a template function\n\
1677 (if a template, try specifying an instantiation: %s<type>)."),
1678 kind
== GLOBAL_BLOCK
? "global" : "static",
1679 name
, symtab
->filename
, name
, name
);
1681 return fixup_symbol_section (sym
, objfile
);
1684 /* A default version of lookup_symbol_nonlocal for use by languages
1685 that can't think of anything better to do. This implements the C
1689 basic_lookup_symbol_nonlocal (const char *name
,
1690 const struct block
*block
,
1691 const domain_enum domain
)
1695 /* NOTE: carlton/2003-05-19: The comments below were written when
1696 this (or what turned into this) was part of lookup_symbol_aux;
1697 I'm much less worried about these questions now, since these
1698 decisions have turned out well, but I leave these comments here
1701 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1702 not it would be appropriate to search the current global block
1703 here as well. (That's what this code used to do before the
1704 is_a_field_of_this check was moved up.) On the one hand, it's
1705 redundant with the lookup_symbol_aux_symtabs search that happens
1706 next. On the other hand, if decode_line_1 is passed an argument
1707 like filename:var, then the user presumably wants 'var' to be
1708 searched for in filename. On the third hand, there shouldn't be
1709 multiple global variables all of which are named 'var', and it's
1710 not like decode_line_1 has ever restricted its search to only
1711 global variables in a single filename. All in all, only
1712 searching the static block here seems best: it's correct and it's
1715 /* NOTE: carlton/2002-12-05: There's also a possible performance
1716 issue here: if you usually search for global symbols in the
1717 current file, then it would be slightly better to search the
1718 current global block before searching all the symtabs. But there
1719 are other factors that have a much greater effect on performance
1720 than that one, so I don't think we should worry about that for
1723 sym
= lookup_symbol_static (name
, block
, domain
);
1727 return lookup_symbol_global (name
, block
, domain
);
1730 /* Lookup a symbol in the static block associated to BLOCK, if there
1731 is one; do nothing if BLOCK is NULL or a global block. */
1734 lookup_symbol_static (const char *name
,
1735 const struct block
*block
,
1736 const domain_enum domain
)
1738 const struct block
*static_block
= block_static_block (block
);
1740 if (static_block
!= NULL
)
1741 return lookup_symbol_aux_block (name
, static_block
, domain
);
1746 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1748 struct global_sym_lookup_data
1750 /* The name of the symbol we are searching for. */
1753 /* The domain to use for our search. */
1756 /* The field where the callback should store the symbol if found.
1757 It should be initialized to NULL before the search is started. */
1758 struct symbol
*result
;
1761 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1762 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1763 OBJFILE. The arguments for the search are passed via CB_DATA,
1764 which in reality is a pointer to struct global_sym_lookup_data. */
1767 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
1770 struct global_sym_lookup_data
*data
=
1771 (struct global_sym_lookup_data
*) cb_data
;
1773 gdb_assert (data
->result
== NULL
);
1775 data
->result
= lookup_symbol_aux_objfile (objfile
, GLOBAL_BLOCK
,
1776 data
->name
, data
->domain
);
1777 if (data
->result
== NULL
)
1778 data
->result
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
,
1779 data
->name
, data
->domain
);
1781 /* If we found a match, tell the iterator to stop. Otherwise,
1783 return (data
->result
!= NULL
);
1786 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1790 lookup_symbol_global (const char *name
,
1791 const struct block
*block
,
1792 const domain_enum domain
)
1794 struct symbol
*sym
= NULL
;
1795 struct objfile
*objfile
= NULL
;
1796 struct global_sym_lookup_data lookup_data
;
1798 /* Call library-specific lookup procedure. */
1799 objfile
= lookup_objfile_from_block (block
);
1800 if (objfile
!= NULL
)
1801 sym
= solib_global_lookup (objfile
, name
, domain
);
1805 memset (&lookup_data
, 0, sizeof (lookup_data
));
1806 lookup_data
.name
= name
;
1807 lookup_data
.domain
= domain
;
1808 gdbarch_iterate_over_objfiles_in_search_order
1809 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
1810 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
1812 return lookup_data
.result
;
1816 symbol_matches_domain (enum language symbol_language
,
1817 domain_enum symbol_domain
,
1820 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1821 A Java class declaration also defines a typedef for the class.
1822 Similarly, any Ada type declaration implicitly defines a typedef. */
1823 if (symbol_language
== language_cplus
1824 || symbol_language
== language_d
1825 || symbol_language
== language_java
1826 || symbol_language
== language_ada
)
1828 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1829 && symbol_domain
== STRUCT_DOMAIN
)
1832 /* For all other languages, strict match is required. */
1833 return (symbol_domain
== domain
);
1836 /* Look up a type named NAME in the struct_domain. The type returned
1837 must not be opaque -- i.e., must have at least one field
1841 lookup_transparent_type (const char *name
)
1843 return current_language
->la_lookup_transparent_type (name
);
1846 /* A helper for basic_lookup_transparent_type that interfaces with the
1847 "quick" symbol table functions. */
1849 static struct type
*
1850 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1853 struct symtab
*symtab
;
1854 struct blockvector
*bv
;
1855 struct block
*block
;
1860 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1864 bv
= BLOCKVECTOR (symtab
);
1865 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1866 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1869 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1871 /* This shouldn't be necessary, but as a last resort
1872 * try looking in the 'other kind' even though the psymtab
1873 * claimed the symbol was one thing. It's possible that
1874 * the psymtab gets it wrong in some cases.
1876 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1877 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1879 /* FIXME; error is wrong in one case. */
1881 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1882 %s may be an inlined function, or may be a template function\n\
1883 (if a template, try specifying an instantiation: %s<type>)."),
1884 name
, symtab
->filename
, name
, name
);
1886 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1887 return SYMBOL_TYPE (sym
);
1892 /* The standard implementation of lookup_transparent_type. This code
1893 was modeled on lookup_symbol -- the parts not relevant to looking
1894 up types were just left out. In particular it's assumed here that
1895 types are available in struct_domain and only at file-static or
1899 basic_lookup_transparent_type (const char *name
)
1902 struct symtab
*s
= NULL
;
1903 struct blockvector
*bv
;
1904 struct objfile
*objfile
;
1905 struct block
*block
;
1908 /* Now search all the global symbols. Do the symtab's first, then
1909 check the psymtab's. If a psymtab indicates the existence
1910 of the desired name as a global, then do psymtab-to-symtab
1911 conversion on the fly and return the found symbol. */
1913 ALL_OBJFILES (objfile
)
1916 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1918 name
, STRUCT_DOMAIN
);
1920 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1922 bv
= BLOCKVECTOR (s
);
1923 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1924 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1925 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1927 return SYMBOL_TYPE (sym
);
1932 ALL_OBJFILES (objfile
)
1934 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1939 /* Now search the static file-level symbols.
1940 Not strictly correct, but more useful than an error.
1941 Do the symtab's first, then
1942 check the psymtab's. If a psymtab indicates the existence
1943 of the desired name as a file-level static, then do psymtab-to-symtab
1944 conversion on the fly and return the found symbol. */
1946 ALL_OBJFILES (objfile
)
1949 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, STATIC_BLOCK
,
1950 name
, STRUCT_DOMAIN
);
1952 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1954 bv
= BLOCKVECTOR (s
);
1955 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1956 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1957 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1959 return SYMBOL_TYPE (sym
);
1964 ALL_OBJFILES (objfile
)
1966 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1971 return (struct type
*) 0;
1974 /* Find the name of the file containing main(). */
1975 /* FIXME: What about languages without main() or specially linked
1976 executables that have no main() ? */
1979 find_main_filename (void)
1981 struct objfile
*objfile
;
1982 char *name
= main_name ();
1984 ALL_OBJFILES (objfile
)
1990 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1997 /* Search BLOCK for symbol NAME in DOMAIN.
1999 Note that if NAME is the demangled form of a C++ symbol, we will fail
2000 to find a match during the binary search of the non-encoded names, but
2001 for now we don't worry about the slight inefficiency of looking for
2002 a match we'll never find, since it will go pretty quick. Once the
2003 binary search terminates, we drop through and do a straight linear
2004 search on the symbols. Each symbol which is marked as being a ObjC/C++
2005 symbol (language_cplus or language_objc set) has both the encoded and
2006 non-encoded names tested for a match. */
2009 lookup_block_symbol (const struct block
*block
, const char *name
,
2010 const domain_enum domain
)
2012 struct block_iterator iter
;
2015 if (!BLOCK_FUNCTION (block
))
2017 for (sym
= block_iter_name_first (block
, name
, &iter
);
2019 sym
= block_iter_name_next (name
, &iter
))
2021 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2022 SYMBOL_DOMAIN (sym
), domain
))
2029 /* Note that parameter symbols do not always show up last in the
2030 list; this loop makes sure to take anything else other than
2031 parameter symbols first; it only uses parameter symbols as a
2032 last resort. Note that this only takes up extra computation
2035 struct symbol
*sym_found
= NULL
;
2037 for (sym
= block_iter_name_first (block
, name
, &iter
);
2039 sym
= block_iter_name_next (name
, &iter
))
2041 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2042 SYMBOL_DOMAIN (sym
), domain
))
2045 if (!SYMBOL_IS_ARGUMENT (sym
))
2051 return (sym_found
); /* Will be NULL if not found. */
2055 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
2058 For each symbol that matches, CALLBACK is called. The symbol and
2059 DATA are passed to the callback.
2061 If CALLBACK returns zero, the iteration ends. Otherwise, the
2062 search continues. This function iterates upward through blocks.
2063 When the outermost block has been finished, the function
2067 iterate_over_symbols (const struct block
*block
, const char *name
,
2068 const domain_enum domain
,
2069 symbol_found_callback_ftype
*callback
,
2074 struct block_iterator iter
;
2077 for (sym
= block_iter_name_first (block
, name
, &iter
);
2079 sym
= block_iter_name_next (name
, &iter
))
2081 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2082 SYMBOL_DOMAIN (sym
), domain
))
2084 if (!callback (sym
, data
))
2089 block
= BLOCK_SUPERBLOCK (block
);
2093 /* Find the symtab associated with PC and SECTION. Look through the
2094 psymtabs and read in another symtab if necessary. */
2097 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2100 struct blockvector
*bv
;
2101 struct symtab
*s
= NULL
;
2102 struct symtab
*best_s
= NULL
;
2103 struct objfile
*objfile
;
2104 struct program_space
*pspace
;
2105 CORE_ADDR distance
= 0;
2106 struct minimal_symbol
*msymbol
;
2108 pspace
= current_program_space
;
2110 /* If we know that this is not a text address, return failure. This is
2111 necessary because we loop based on the block's high and low code
2112 addresses, which do not include the data ranges, and because
2113 we call find_pc_sect_psymtab which has a similar restriction based
2114 on the partial_symtab's texthigh and textlow. */
2115 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2117 && (MSYMBOL_TYPE (msymbol
) == mst_data
2118 || MSYMBOL_TYPE (msymbol
) == mst_bss
2119 || MSYMBOL_TYPE (msymbol
) == mst_abs
2120 || MSYMBOL_TYPE (msymbol
) == mst_file_data
2121 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
2124 /* Search all symtabs for the one whose file contains our address, and which
2125 is the smallest of all the ones containing the address. This is designed
2126 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2127 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2128 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2130 This happens for native ecoff format, where code from included files
2131 gets its own symtab. The symtab for the included file should have
2132 been read in already via the dependency mechanism.
2133 It might be swifter to create several symtabs with the same name
2134 like xcoff does (I'm not sure).
2136 It also happens for objfiles that have their functions reordered.
2137 For these, the symtab we are looking for is not necessarily read in. */
2139 ALL_PRIMARY_SYMTABS (objfile
, s
)
2141 bv
= BLOCKVECTOR (s
);
2142 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2144 if (BLOCK_START (b
) <= pc
2145 && BLOCK_END (b
) > pc
2147 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2149 /* For an objfile that has its functions reordered,
2150 find_pc_psymtab will find the proper partial symbol table
2151 and we simply return its corresponding symtab. */
2152 /* In order to better support objfiles that contain both
2153 stabs and coff debugging info, we continue on if a psymtab
2155 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2157 struct symtab
*result
;
2160 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2169 struct block_iterator iter
;
2170 struct symbol
*sym
= NULL
;
2172 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2174 fixup_symbol_section (sym
, objfile
);
2175 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
2179 continue; /* No symbol in this symtab matches
2182 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2190 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2192 ALL_OBJFILES (objfile
)
2194 struct symtab
*result
;
2198 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2209 /* Find the symtab associated with PC. Look through the psymtabs and read
2210 in another symtab if necessary. Backward compatibility, no section. */
2213 find_pc_symtab (CORE_ADDR pc
)
2215 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2219 /* Find the source file and line number for a given PC value and SECTION.
2220 Return a structure containing a symtab pointer, a line number,
2221 and a pc range for the entire source line.
2222 The value's .pc field is NOT the specified pc.
2223 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2224 use the line that ends there. Otherwise, in that case, the line
2225 that begins there is used. */
2227 /* The big complication here is that a line may start in one file, and end just
2228 before the start of another file. This usually occurs when you #include
2229 code in the middle of a subroutine. To properly find the end of a line's PC
2230 range, we must search all symtabs associated with this compilation unit, and
2231 find the one whose first PC is closer than that of the next line in this
2234 /* If it's worth the effort, we could be using a binary search. */
2236 struct symtab_and_line
2237 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2240 struct linetable
*l
;
2243 struct linetable_entry
*item
;
2244 struct symtab_and_line val
;
2245 struct blockvector
*bv
;
2246 struct minimal_symbol
*msymbol
;
2247 struct minimal_symbol
*mfunsym
;
2248 struct objfile
*objfile
;
2250 /* Info on best line seen so far, and where it starts, and its file. */
2252 struct linetable_entry
*best
= NULL
;
2253 CORE_ADDR best_end
= 0;
2254 struct symtab
*best_symtab
= 0;
2256 /* Store here the first line number
2257 of a file which contains the line at the smallest pc after PC.
2258 If we don't find a line whose range contains PC,
2259 we will use a line one less than this,
2260 with a range from the start of that file to the first line's pc. */
2261 struct linetable_entry
*alt
= NULL
;
2262 struct symtab
*alt_symtab
= 0;
2264 /* Info on best line seen in this file. */
2266 struct linetable_entry
*prev
;
2268 /* If this pc is not from the current frame,
2269 it is the address of the end of a call instruction.
2270 Quite likely that is the start of the following statement.
2271 But what we want is the statement containing the instruction.
2272 Fudge the pc to make sure we get that. */
2274 init_sal (&val
); /* initialize to zeroes */
2276 val
.pspace
= current_program_space
;
2278 /* It's tempting to assume that, if we can't find debugging info for
2279 any function enclosing PC, that we shouldn't search for line
2280 number info, either. However, GAS can emit line number info for
2281 assembly files --- very helpful when debugging hand-written
2282 assembly code. In such a case, we'd have no debug info for the
2283 function, but we would have line info. */
2288 /* elz: added this because this function returned the wrong
2289 information if the pc belongs to a stub (import/export)
2290 to call a shlib function. This stub would be anywhere between
2291 two functions in the target, and the line info was erroneously
2292 taken to be the one of the line before the pc. */
2294 /* RT: Further explanation:
2296 * We have stubs (trampolines) inserted between procedures.
2298 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2299 * exists in the main image.
2301 * In the minimal symbol table, we have a bunch of symbols
2302 * sorted by start address. The stubs are marked as "trampoline",
2303 * the others appear as text. E.g.:
2305 * Minimal symbol table for main image
2306 * main: code for main (text symbol)
2307 * shr1: stub (trampoline symbol)
2308 * foo: code for foo (text symbol)
2310 * Minimal symbol table for "shr1" image:
2312 * shr1: code for shr1 (text symbol)
2315 * So the code below is trying to detect if we are in the stub
2316 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2317 * and if found, do the symbolization from the real-code address
2318 * rather than the stub address.
2320 * Assumptions being made about the minimal symbol table:
2321 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2322 * if we're really in the trampoline.s If we're beyond it (say
2323 * we're in "foo" in the above example), it'll have a closer
2324 * symbol (the "foo" text symbol for example) and will not
2325 * return the trampoline.
2326 * 2. lookup_minimal_symbol_text() will find a real text symbol
2327 * corresponding to the trampoline, and whose address will
2328 * be different than the trampoline address. I put in a sanity
2329 * check for the address being the same, to avoid an
2330 * infinite recursion.
2332 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2333 if (msymbol
!= NULL
)
2334 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2336 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2338 if (mfunsym
== NULL
)
2339 /* I eliminated this warning since it is coming out
2340 * in the following situation:
2341 * gdb shmain // test program with shared libraries
2342 * (gdb) break shr1 // function in shared lib
2343 * Warning: In stub for ...
2344 * In the above situation, the shared lib is not loaded yet,
2345 * so of course we can't find the real func/line info,
2346 * but the "break" still works, and the warning is annoying.
2347 * So I commented out the warning. RT */
2348 /* warning ("In stub for %s; unable to find real function/line info",
2349 SYMBOL_LINKAGE_NAME (msymbol)); */
2352 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
2353 == SYMBOL_VALUE_ADDRESS (msymbol
))
2354 /* Avoid infinite recursion */
2355 /* See above comment about why warning is commented out. */
2356 /* warning ("In stub for %s; unable to find real function/line info",
2357 SYMBOL_LINKAGE_NAME (msymbol)); */
2361 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2365 s
= find_pc_sect_symtab (pc
, section
);
2368 /* If no symbol information, return previous pc. */
2375 bv
= BLOCKVECTOR (s
);
2376 objfile
= s
->objfile
;
2378 /* Look at all the symtabs that share this blockvector.
2379 They all have the same apriori range, that we found was right;
2380 but they have different line tables. */
2382 ALL_OBJFILE_SYMTABS (objfile
, s
)
2384 if (BLOCKVECTOR (s
) != bv
)
2387 /* Find the best line in this symtab. */
2394 /* I think len can be zero if the symtab lacks line numbers
2395 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2396 I'm not sure which, and maybe it depends on the symbol
2402 item
= l
->item
; /* Get first line info. */
2404 /* Is this file's first line closer than the first lines of other files?
2405 If so, record this file, and its first line, as best alternate. */
2406 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2412 for (i
= 0; i
< len
; i
++, item
++)
2414 /* Leave prev pointing to the linetable entry for the last line
2415 that started at or before PC. */
2422 /* At this point, prev points at the line whose start addr is <= pc, and
2423 item points at the next line. If we ran off the end of the linetable
2424 (pc >= start of the last line), then prev == item. If pc < start of
2425 the first line, prev will not be set. */
2427 /* Is this file's best line closer than the best in the other files?
2428 If so, record this file, and its best line, as best so far. Don't
2429 save prev if it represents the end of a function (i.e. line number
2430 0) instead of a real line. */
2432 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2437 /* Discard BEST_END if it's before the PC of the current BEST. */
2438 if (best_end
<= best
->pc
)
2442 /* If another line (denoted by ITEM) is in the linetable and its
2443 PC is after BEST's PC, but before the current BEST_END, then
2444 use ITEM's PC as the new best_end. */
2445 if (best
&& i
< len
&& item
->pc
> best
->pc
2446 && (best_end
== 0 || best_end
> item
->pc
))
2447 best_end
= item
->pc
;
2452 /* If we didn't find any line number info, just return zeros.
2453 We used to return alt->line - 1 here, but that could be
2454 anywhere; if we don't have line number info for this PC,
2455 don't make some up. */
2458 else if (best
->line
== 0)
2460 /* If our best fit is in a range of PC's for which no line
2461 number info is available (line number is zero) then we didn't
2462 find any valid line information. */
2467 val
.symtab
= best_symtab
;
2468 val
.line
= best
->line
;
2470 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2475 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2477 val
.section
= section
;
2481 /* Backward compatibility (no section). */
2483 struct symtab_and_line
2484 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2486 struct obj_section
*section
;
2488 section
= find_pc_overlay (pc
);
2489 if (pc_in_unmapped_range (pc
, section
))
2490 pc
= overlay_mapped_address (pc
, section
);
2491 return find_pc_sect_line (pc
, section
, notcurrent
);
2494 /* Find line number LINE in any symtab whose name is the same as
2497 If found, return the symtab that contains the linetable in which it was
2498 found, set *INDEX to the index in the linetable of the best entry
2499 found, and set *EXACT_MATCH nonzero if the value returned is an
2502 If not found, return NULL. */
2505 find_line_symtab (struct symtab
*symtab
, int line
,
2506 int *index
, int *exact_match
)
2508 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2510 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2514 struct linetable
*best_linetable
;
2515 struct symtab
*best_symtab
;
2517 /* First try looking it up in the given symtab. */
2518 best_linetable
= LINETABLE (symtab
);
2519 best_symtab
= symtab
;
2520 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
2521 if (best_index
< 0 || !exact
)
2523 /* Didn't find an exact match. So we better keep looking for
2524 another symtab with the same name. In the case of xcoff,
2525 multiple csects for one source file (produced by IBM's FORTRAN
2526 compiler) produce multiple symtabs (this is unavoidable
2527 assuming csects can be at arbitrary places in memory and that
2528 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2530 /* BEST is the smallest linenumber > LINE so far seen,
2531 or 0 if none has been seen so far.
2532 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2535 struct objfile
*objfile
;
2538 if (best_index
>= 0)
2539 best
= best_linetable
->item
[best_index
].line
;
2543 ALL_OBJFILES (objfile
)
2546 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2550 ALL_SYMTABS (objfile
, s
)
2552 struct linetable
*l
;
2555 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2557 if (FILENAME_CMP (symtab_to_fullname (symtab
),
2558 symtab_to_fullname (s
)) != 0)
2561 ind
= find_line_common (l
, line
, &exact
, 0);
2571 if (best
== 0 || l
->item
[ind
].line
< best
)
2573 best
= l
->item
[ind
].line
;
2586 *index
= best_index
;
2588 *exact_match
= exact
;
2593 /* Given SYMTAB, returns all the PCs function in the symtab that
2594 exactly match LINE. Returns NULL if there are no exact matches,
2595 but updates BEST_ITEM in this case. */
2598 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
2599 struct linetable_entry
**best_item
)
2602 struct symbol
*previous_function
= NULL
;
2603 VEC (CORE_ADDR
) *result
= NULL
;
2605 /* First, collect all the PCs that are at this line. */
2611 idx
= find_line_common (LINETABLE (symtab
), line
, &was_exact
, start
);
2617 struct linetable_entry
*item
= &LINETABLE (symtab
)->item
[idx
];
2619 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
2625 VEC_safe_push (CORE_ADDR
, result
, LINETABLE (symtab
)->item
[idx
].pc
);
2633 /* Set the PC value for a given source file and line number and return true.
2634 Returns zero for invalid line number (and sets the PC to 0).
2635 The source file is specified with a struct symtab. */
2638 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2640 struct linetable
*l
;
2647 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2650 l
= LINETABLE (symtab
);
2651 *pc
= l
->item
[ind
].pc
;
2658 /* Find the range of pc values in a line.
2659 Store the starting pc of the line into *STARTPTR
2660 and the ending pc (start of next line) into *ENDPTR.
2661 Returns 1 to indicate success.
2662 Returns 0 if could not find the specified line. */
2665 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2668 CORE_ADDR startaddr
;
2669 struct symtab_and_line found_sal
;
2672 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2675 /* This whole function is based on address. For example, if line 10 has
2676 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2677 "info line *0x123" should say the line goes from 0x100 to 0x200
2678 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2679 This also insures that we never give a range like "starts at 0x134
2680 and ends at 0x12c". */
2682 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2683 if (found_sal
.line
!= sal
.line
)
2685 /* The specified line (sal) has zero bytes. */
2686 *startptr
= found_sal
.pc
;
2687 *endptr
= found_sal
.pc
;
2691 *startptr
= found_sal
.pc
;
2692 *endptr
= found_sal
.end
;
2697 /* Given a line table and a line number, return the index into the line
2698 table for the pc of the nearest line whose number is >= the specified one.
2699 Return -1 if none is found. The value is >= 0 if it is an index.
2700 START is the index at which to start searching the line table.
2702 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2705 find_line_common (struct linetable
*l
, int lineno
,
2706 int *exact_match
, int start
)
2711 /* BEST is the smallest linenumber > LINENO so far seen,
2712 or 0 if none has been seen so far.
2713 BEST_INDEX identifies the item for it. */
2715 int best_index
= -1;
2726 for (i
= start
; i
< len
; i
++)
2728 struct linetable_entry
*item
= &(l
->item
[i
]);
2730 if (item
->line
== lineno
)
2732 /* Return the first (lowest address) entry which matches. */
2737 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2744 /* If we got here, we didn't get an exact match. */
2749 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2751 struct symtab_and_line sal
;
2753 sal
= find_pc_line (pc
, 0);
2756 return sal
.symtab
!= 0;
2759 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2760 address for that function that has an entry in SYMTAB's line info
2761 table. If such an entry cannot be found, return FUNC_ADDR
2765 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2767 CORE_ADDR func_start
, func_end
;
2768 struct linetable
*l
;
2771 /* Give up if this symbol has no lineinfo table. */
2772 l
= LINETABLE (symtab
);
2776 /* Get the range for the function's PC values, or give up if we
2777 cannot, for some reason. */
2778 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2781 /* Linetable entries are ordered by PC values, see the commentary in
2782 symtab.h where `struct linetable' is defined. Thus, the first
2783 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2784 address we are looking for. */
2785 for (i
= 0; i
< l
->nitems
; i
++)
2787 struct linetable_entry
*item
= &(l
->item
[i
]);
2789 /* Don't use line numbers of zero, they mark special entries in
2790 the table. See the commentary on symtab.h before the
2791 definition of struct linetable. */
2792 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2799 /* Given a function symbol SYM, find the symtab and line for the start
2801 If the argument FUNFIRSTLINE is nonzero, we want the first line
2802 of real code inside the function. */
2804 struct symtab_and_line
2805 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2807 struct symtab_and_line sal
;
2809 fixup_symbol_section (sym
, NULL
);
2810 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2811 SYMBOL_OBJ_SECTION (sym
), 0);
2813 /* We always should have a line for the function start address.
2814 If we don't, something is odd. Create a plain SAL refering
2815 just the PC and hope that skip_prologue_sal (if requested)
2816 can find a line number for after the prologue. */
2817 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2820 sal
.pspace
= current_program_space
;
2821 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2822 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2826 skip_prologue_sal (&sal
);
2831 /* Adjust SAL to the first instruction past the function prologue.
2832 If the PC was explicitly specified, the SAL is not changed.
2833 If the line number was explicitly specified, at most the SAL's PC
2834 is updated. If SAL is already past the prologue, then do nothing. */
2837 skip_prologue_sal (struct symtab_and_line
*sal
)
2840 struct symtab_and_line start_sal
;
2841 struct cleanup
*old_chain
;
2842 CORE_ADDR pc
, saved_pc
;
2843 struct obj_section
*section
;
2845 struct objfile
*objfile
;
2846 struct gdbarch
*gdbarch
;
2847 struct block
*b
, *function_block
;
2848 int force_skip
, skip
;
2850 /* Do not change the SAL if PC was specified explicitly. */
2851 if (sal
->explicit_pc
)
2854 old_chain
= save_current_space_and_thread ();
2855 switch_to_program_space_and_thread (sal
->pspace
);
2857 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2860 fixup_symbol_section (sym
, NULL
);
2862 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2863 section
= SYMBOL_OBJ_SECTION (sym
);
2864 name
= SYMBOL_LINKAGE_NAME (sym
);
2865 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2869 struct minimal_symbol
*msymbol
2870 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2872 if (msymbol
== NULL
)
2874 do_cleanups (old_chain
);
2878 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2879 section
= SYMBOL_OBJ_SECTION (msymbol
);
2880 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2881 objfile
= msymbol_objfile (msymbol
);
2884 gdbarch
= get_objfile_arch (objfile
);
2886 /* Process the prologue in two passes. In the first pass try to skip the
2887 prologue (SKIP is true) and verify there is a real need for it (indicated
2888 by FORCE_SKIP). If no such reason was found run a second pass where the
2889 prologue is not skipped (SKIP is false). */
2894 /* Be conservative - allow direct PC (without skipping prologue) only if we
2895 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2896 have to be set by the caller so we use SYM instead. */
2897 if (sym
&& SYMBOL_SYMTAB (sym
)->locations_valid
)
2905 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2906 so that gdbarch_skip_prologue has something unique to work on. */
2907 if (section_is_overlay (section
) && !section_is_mapped (section
))
2908 pc
= overlay_unmapped_address (pc
, section
);
2910 /* Skip "first line" of function (which is actually its prologue). */
2911 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2913 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2915 /* For overlays, map pc back into its mapped VMA range. */
2916 pc
= overlay_mapped_address (pc
, section
);
2918 /* Calculate line number. */
2919 start_sal
= find_pc_sect_line (pc
, section
, 0);
2921 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2922 line is still part of the same function. */
2923 if (skip
&& start_sal
.pc
!= pc
2924 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2925 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2926 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2927 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2929 /* First pc of next line */
2931 /* Recalculate the line number (might not be N+1). */
2932 start_sal
= find_pc_sect_line (pc
, section
, 0);
2935 /* On targets with executable formats that don't have a concept of
2936 constructors (ELF with .init has, PE doesn't), gcc emits a call
2937 to `__main' in `main' between the prologue and before user
2939 if (gdbarch_skip_main_prologue_p (gdbarch
)
2940 && name
&& strcmp_iw (name
, "main") == 0)
2942 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2943 /* Recalculate the line number (might not be N+1). */
2944 start_sal
= find_pc_sect_line (pc
, section
, 0);
2948 while (!force_skip
&& skip
--);
2950 /* If we still don't have a valid source line, try to find the first
2951 PC in the lineinfo table that belongs to the same function. This
2952 happens with COFF debug info, which does not seem to have an
2953 entry in lineinfo table for the code after the prologue which has
2954 no direct relation to source. For example, this was found to be
2955 the case with the DJGPP target using "gcc -gcoff" when the
2956 compiler inserted code after the prologue to make sure the stack
2958 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
2960 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2961 /* Recalculate the line number. */
2962 start_sal
= find_pc_sect_line (pc
, section
, 0);
2965 do_cleanups (old_chain
);
2967 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2968 forward SAL to the end of the prologue. */
2973 sal
->section
= section
;
2975 /* Unless the explicit_line flag was set, update the SAL line
2976 and symtab to correspond to the modified PC location. */
2977 if (sal
->explicit_line
)
2980 sal
->symtab
= start_sal
.symtab
;
2981 sal
->line
= start_sal
.line
;
2982 sal
->end
= start_sal
.end
;
2984 /* Check if we are now inside an inlined function. If we can,
2985 use the call site of the function instead. */
2986 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2987 function_block
= NULL
;
2990 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2992 else if (BLOCK_FUNCTION (b
) != NULL
)
2994 b
= BLOCK_SUPERBLOCK (b
);
2996 if (function_block
!= NULL
2997 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2999 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3000 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
3004 /* If P is of the form "operator[ \t]+..." where `...' is
3005 some legitimate operator text, return a pointer to the
3006 beginning of the substring of the operator text.
3007 Otherwise, return "". */
3010 operator_chars (char *p
, char **end
)
3013 if (strncmp (p
, "operator", 8))
3017 /* Don't get faked out by `operator' being part of a longer
3019 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3022 /* Allow some whitespace between `operator' and the operator symbol. */
3023 while (*p
== ' ' || *p
== '\t')
3026 /* Recognize 'operator TYPENAME'. */
3028 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3032 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3041 case '\\': /* regexp quoting */
3044 if (p
[2] == '=') /* 'operator\*=' */
3046 else /* 'operator\*' */
3050 else if (p
[1] == '[')
3053 error (_("mismatched quoting on brackets, "
3054 "try 'operator\\[\\]'"));
3055 else if (p
[2] == '\\' && p
[3] == ']')
3057 *end
= p
+ 4; /* 'operator\[\]' */
3061 error (_("nothing is allowed between '[' and ']'"));
3065 /* Gratuitous qoute: skip it and move on. */
3087 if (p
[0] == '-' && p
[1] == '>')
3089 /* Struct pointer member operator 'operator->'. */
3092 *end
= p
+ 3; /* 'operator->*' */
3095 else if (p
[2] == '\\')
3097 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3102 *end
= p
+ 2; /* 'operator->' */
3106 if (p
[1] == '=' || p
[1] == p
[0])
3117 error (_("`operator ()' must be specified "
3118 "without whitespace in `()'"));
3123 error (_("`operator ?:' must be specified "
3124 "without whitespace in `?:'"));
3129 error (_("`operator []' must be specified "
3130 "without whitespace in `[]'"));
3134 error (_("`operator %s' not supported"), p
);
3143 /* Cache to watch for file names already seen by filename_seen. */
3145 struct filename_seen_cache
3147 /* Table of files seen so far. */
3149 /* Initial size of the table. It automagically grows from here. */
3150 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3153 /* filename_seen_cache constructor. */
3155 static struct filename_seen_cache
*
3156 create_filename_seen_cache (void)
3158 struct filename_seen_cache
*cache
;
3160 cache
= XNEW (struct filename_seen_cache
);
3161 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3162 filename_hash
, filename_eq
,
3163 NULL
, xcalloc
, xfree
);
3168 /* Empty the cache, but do not delete it. */
3171 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
3173 htab_empty (cache
->tab
);
3176 /* filename_seen_cache destructor.
3177 This takes a void * argument as it is generally used as a cleanup. */
3180 delete_filename_seen_cache (void *ptr
)
3182 struct filename_seen_cache
*cache
= ptr
;
3184 htab_delete (cache
->tab
);
3188 /* If FILE is not already in the table of files in CACHE, return zero;
3189 otherwise return non-zero. Optionally add FILE to the table if ADD
3192 NOTE: We don't manage space for FILE, we assume FILE lives as long
3193 as the caller needs. */
3196 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
3200 /* Is FILE in tab? */
3201 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
3205 /* No; maybe add it to tab. */
3207 *slot
= (char *) file
;
3212 /* Data structure to maintain printing state for output_source_filename. */
3214 struct output_source_filename_data
3216 /* Cache of what we've seen so far. */
3217 struct filename_seen_cache
*filename_seen_cache
;
3219 /* Flag of whether we're printing the first one. */
3223 /* Slave routine for sources_info. Force line breaks at ,'s.
3224 NAME is the name to print.
3225 DATA contains the state for printing and watching for duplicates. */
3228 output_source_filename (const char *name
,
3229 struct output_source_filename_data
*data
)
3231 /* Since a single source file can result in several partial symbol
3232 tables, we need to avoid printing it more than once. Note: if
3233 some of the psymtabs are read in and some are not, it gets
3234 printed both under "Source files for which symbols have been
3235 read" and "Source files for which symbols will be read in on
3236 demand". I consider this a reasonable way to deal with the
3237 situation. I'm not sure whether this can also happen for
3238 symtabs; it doesn't hurt to check. */
3240 /* Was NAME already seen? */
3241 if (filename_seen (data
->filename_seen_cache
, name
, 1))
3243 /* Yes; don't print it again. */
3247 /* No; print it and reset *FIRST. */
3249 printf_filtered (", ");
3253 fputs_filtered (name
, gdb_stdout
);
3256 /* A callback for map_partial_symbol_filenames. */
3259 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3262 output_source_filename (fullname
? fullname
: filename
, data
);
3266 sources_info (char *ignore
, int from_tty
)
3269 struct objfile
*objfile
;
3270 struct output_source_filename_data data
;
3271 struct cleanup
*cleanups
;
3273 if (!have_full_symbols () && !have_partial_symbols ())
3275 error (_("No symbol table is loaded. Use the \"file\" command."));
3278 data
.filename_seen_cache
= create_filename_seen_cache ();
3279 cleanups
= make_cleanup (delete_filename_seen_cache
,
3280 data
.filename_seen_cache
);
3282 printf_filtered ("Source files for which symbols have been read in:\n\n");
3285 ALL_SYMTABS (objfile
, s
)
3287 const char *fullname
= symtab_to_fullname (s
);
3289 output_source_filename (fullname
, &data
);
3291 printf_filtered ("\n\n");
3293 printf_filtered ("Source files for which symbols "
3294 "will be read in on demand:\n\n");
3296 clear_filename_seen_cache (data
.filename_seen_cache
);
3298 map_partial_symbol_filenames (output_partial_symbol_filename
, &data
,
3299 1 /*need_fullname*/);
3300 printf_filtered ("\n");
3302 do_cleanups (cleanups
);
3306 file_matches (const char *file
, char *files
[], int nfiles
)
3310 if (file
!= NULL
&& nfiles
!= 0)
3312 for (i
= 0; i
< nfiles
; i
++)
3314 if (filename_cmp (files
[i
], lbasename (file
)) == 0)
3318 else if (nfiles
== 0)
3323 /* Free any memory associated with a search. */
3326 free_search_symbols (struct symbol_search
*symbols
)
3328 struct symbol_search
*p
;
3329 struct symbol_search
*next
;
3331 for (p
= symbols
; p
!= NULL
; p
= next
)
3339 do_free_search_symbols_cleanup (void *symbols
)
3341 free_search_symbols (symbols
);
3345 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
3347 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
3350 /* Helper function for sort_search_symbols and qsort. Can only
3351 sort symbols, not minimal symbols. */
3354 compare_search_syms (const void *sa
, const void *sb
)
3356 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
3357 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
3359 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
3360 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3363 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3364 prevtail where it is, but update its next pointer to point to
3365 the first of the sorted symbols. */
3367 static struct symbol_search
*
3368 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3370 struct symbol_search
**symbols
, *symp
, *old_next
;
3373 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3375 symp
= prevtail
->next
;
3376 for (i
= 0; i
< nfound
; i
++)
3381 /* Generally NULL. */
3384 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3385 compare_search_syms
);
3388 for (i
= 0; i
< nfound
; i
++)
3390 symp
->next
= symbols
[i
];
3393 symp
->next
= old_next
;
3399 /* An object of this type is passed as the user_data to the
3400 expand_symtabs_matching method. */
3401 struct search_symbols_data
3406 /* It is true if PREG contains valid data, false otherwise. */
3407 unsigned preg_p
: 1;
3411 /* A callback for expand_symtabs_matching. */
3414 search_symbols_file_matches (const char *filename
, void *user_data
)
3416 struct search_symbols_data
*data
= user_data
;
3418 return file_matches (filename
, data
->files
, data
->nfiles
);
3421 /* A callback for expand_symtabs_matching. */
3424 search_symbols_name_matches (const char *symname
, void *user_data
)
3426 struct search_symbols_data
*data
= user_data
;
3428 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3431 /* Search the symbol table for matches to the regular expression REGEXP,
3432 returning the results in *MATCHES.
3434 Only symbols of KIND are searched:
3435 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3436 and constants (enums)
3437 FUNCTIONS_DOMAIN - search all functions
3438 TYPES_DOMAIN - search all type names
3439 ALL_DOMAIN - an internal error for this function
3441 free_search_symbols should be called when *MATCHES is no longer needed.
3443 The results are sorted locally; each symtab's global and static blocks are
3444 separately alphabetized. */
3447 search_symbols (char *regexp
, enum search_domain kind
,
3448 int nfiles
, char *files
[],
3449 struct symbol_search
**matches
)
3452 struct blockvector
*bv
;
3455 struct block_iterator iter
;
3457 struct objfile
*objfile
;
3458 struct minimal_symbol
*msymbol
;
3460 static const enum minimal_symbol_type types
[]
3461 = {mst_data
, mst_text
, mst_abs
};
3462 static const enum minimal_symbol_type types2
[]
3463 = {mst_bss
, mst_file_text
, mst_abs
};
3464 static const enum minimal_symbol_type types3
[]
3465 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3466 static const enum minimal_symbol_type types4
[]
3467 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3468 enum minimal_symbol_type ourtype
;
3469 enum minimal_symbol_type ourtype2
;
3470 enum minimal_symbol_type ourtype3
;
3471 enum minimal_symbol_type ourtype4
;
3472 struct symbol_search
*sr
;
3473 struct symbol_search
*psr
;
3474 struct symbol_search
*tail
;
3475 struct search_symbols_data datum
;
3477 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3478 CLEANUP_CHAIN is freed only in the case of an error. */
3479 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3480 struct cleanup
*retval_chain
;
3482 gdb_assert (kind
<= TYPES_DOMAIN
);
3484 ourtype
= types
[kind
];
3485 ourtype2
= types2
[kind
];
3486 ourtype3
= types3
[kind
];
3487 ourtype4
= types4
[kind
];
3489 sr
= *matches
= NULL
;
3495 /* Make sure spacing is right for C++ operators.
3496 This is just a courtesy to make the matching less sensitive
3497 to how many spaces the user leaves between 'operator'
3498 and <TYPENAME> or <OPERATOR>. */
3500 char *opname
= operator_chars (regexp
, &opend
);
3505 int fix
= -1; /* -1 means ok; otherwise number of
3508 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3510 /* There should 1 space between 'operator' and 'TYPENAME'. */
3511 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3516 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3517 if (opname
[-1] == ' ')
3520 /* If wrong number of spaces, fix it. */
3523 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3525 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3530 errcode
= regcomp (&datum
.preg
, regexp
,
3531 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3535 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3537 make_cleanup (xfree
, err
);
3538 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3541 make_regfree_cleanup (&datum
.preg
);
3544 /* Search through the partial symtabs *first* for all symbols
3545 matching the regexp. That way we don't have to reproduce all of
3546 the machinery below. */
3548 datum
.nfiles
= nfiles
;
3549 datum
.files
= files
;
3550 ALL_OBJFILES (objfile
)
3553 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3556 : search_symbols_file_matches
),
3557 search_symbols_name_matches
,
3562 retval_chain
= old_chain
;
3564 /* Here, we search through the minimal symbol tables for functions
3565 and variables that match, and force their symbols to be read.
3566 This is in particular necessary for demangled variable names,
3567 which are no longer put into the partial symbol tables.
3568 The symbol will then be found during the scan of symtabs below.
3570 For functions, find_pc_symtab should succeed if we have debug info
3571 for the function, for variables we have to call
3572 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3574 If the lookup fails, set found_misc so that we will rescan to print
3575 any matching symbols without debug info.
3576 We only search the objfile the msymbol came from, we no longer search
3577 all objfiles. In large programs (1000s of shared libs) searching all
3578 objfiles is not worth the pain. */
3580 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3582 ALL_MSYMBOLS (objfile
, msymbol
)
3586 if (msymbol
->created_by_gdb
)
3589 if (MSYMBOL_TYPE (msymbol
) == ourtype
3590 || MSYMBOL_TYPE (msymbol
) == ourtype2
3591 || MSYMBOL_TYPE (msymbol
) == ourtype3
3592 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3595 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3598 /* Note: An important side-effect of these lookup functions
3599 is to expand the symbol table if msymbol is found, for the
3600 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3601 if (kind
== FUNCTIONS_DOMAIN
3602 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
3603 : (lookup_symbol_in_objfile_from_linkage_name
3604 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3612 ALL_PRIMARY_SYMTABS (objfile
, s
)
3614 bv
= BLOCKVECTOR (s
);
3615 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3617 struct symbol_search
*prevtail
= tail
;
3620 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3621 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3623 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3627 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3629 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3631 && ((kind
== VARIABLES_DOMAIN
3632 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3633 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3634 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3635 /* LOC_CONST can be used for more than just enums,
3636 e.g., c++ static const members.
3637 We only want to skip enums here. */
3638 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3639 && TYPE_CODE (SYMBOL_TYPE (sym
))
3641 || (kind
== FUNCTIONS_DOMAIN
3642 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3643 || (kind
== TYPES_DOMAIN
3644 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3647 psr
= (struct symbol_search
*)
3648 xmalloc (sizeof (struct symbol_search
));
3650 psr
->symtab
= real_symtab
;
3652 psr
->msymbol
= NULL
;
3664 if (prevtail
== NULL
)
3666 struct symbol_search dummy
;
3669 tail
= sort_search_symbols (&dummy
, nfound
);
3672 make_cleanup_free_search_symbols (sr
);
3675 tail
= sort_search_symbols (prevtail
, nfound
);
3680 /* If there are no eyes, avoid all contact. I mean, if there are
3681 no debug symbols, then print directly from the msymbol_vector. */
3683 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
3685 ALL_MSYMBOLS (objfile
, msymbol
)
3689 if (msymbol
->created_by_gdb
)
3692 if (MSYMBOL_TYPE (msymbol
) == ourtype
3693 || MSYMBOL_TYPE (msymbol
) == ourtype2
3694 || MSYMBOL_TYPE (msymbol
) == ourtype3
3695 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3698 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3701 /* For functions we can do a quick check of whether the
3702 symbol might be found via find_pc_symtab. */
3703 if (kind
!= FUNCTIONS_DOMAIN
3704 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
)
3706 if (lookup_symbol_in_objfile_from_linkage_name
3707 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3711 psr
= (struct symbol_search
*)
3712 xmalloc (sizeof (struct symbol_search
));
3714 psr
->msymbol
= msymbol
;
3721 make_cleanup_free_search_symbols (sr
);
3733 discard_cleanups (retval_chain
);
3734 do_cleanups (old_chain
);
3738 /* Helper function for symtab_symbol_info, this function uses
3739 the data returned from search_symbols() to print information
3740 regarding the match to gdb_stdout. */
3743 print_symbol_info (enum search_domain kind
,
3744 struct symtab
*s
, struct symbol
*sym
,
3745 int block
, char *last
)
3747 if (last
== NULL
|| filename_cmp (last
, s
->filename
) != 0)
3749 fputs_filtered ("\nFile ", gdb_stdout
);
3750 fputs_filtered (s
->filename
, gdb_stdout
);
3751 fputs_filtered (":\n", gdb_stdout
);
3754 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3755 printf_filtered ("static ");
3757 /* Typedef that is not a C++ class. */
3758 if (kind
== TYPES_DOMAIN
3759 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3760 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3761 /* variable, func, or typedef-that-is-c++-class. */
3762 else if (kind
< TYPES_DOMAIN
3763 || (kind
== TYPES_DOMAIN
3764 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3766 type_print (SYMBOL_TYPE (sym
),
3767 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3768 ? "" : SYMBOL_PRINT_NAME (sym
)),
3771 printf_filtered (";\n");
3775 /* This help function for symtab_symbol_info() prints information
3776 for non-debugging symbols to gdb_stdout. */
3779 print_msymbol_info (struct minimal_symbol
*msymbol
)
3781 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3784 if (gdbarch_addr_bit (gdbarch
) <= 32)
3785 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3786 & (CORE_ADDR
) 0xffffffff,
3789 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3791 printf_filtered ("%s %s\n",
3792 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3795 /* This is the guts of the commands "info functions", "info types", and
3796 "info variables". It calls search_symbols to find all matches and then
3797 print_[m]symbol_info to print out some useful information about the
3801 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3803 static const char * const classnames
[] =
3804 {"variable", "function", "type"};
3805 struct symbol_search
*symbols
;
3806 struct symbol_search
*p
;
3807 struct cleanup
*old_chain
;
3808 char *last_filename
= NULL
;
3811 gdb_assert (kind
<= TYPES_DOMAIN
);
3813 /* Must make sure that if we're interrupted, symbols gets freed. */
3814 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3815 old_chain
= make_cleanup_free_search_symbols (symbols
);
3818 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
3819 classnames
[kind
], regexp
);
3821 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
3823 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3827 if (p
->msymbol
!= NULL
)
3831 printf_filtered (_("\nNon-debugging symbols:\n"));
3834 print_msymbol_info (p
->msymbol
);
3838 print_symbol_info (kind
,
3843 last_filename
= p
->symtab
->filename
;
3847 do_cleanups (old_chain
);
3851 variables_info (char *regexp
, int from_tty
)
3853 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3857 functions_info (char *regexp
, int from_tty
)
3859 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3864 types_info (char *regexp
, int from_tty
)
3866 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3869 /* Breakpoint all functions matching regular expression. */
3872 rbreak_command_wrapper (char *regexp
, int from_tty
)
3874 rbreak_command (regexp
, from_tty
);
3877 /* A cleanup function that calls end_rbreak_breakpoints. */
3880 do_end_rbreak_breakpoints (void *ignore
)
3882 end_rbreak_breakpoints ();
3886 rbreak_command (char *regexp
, int from_tty
)
3888 struct symbol_search
*ss
;
3889 struct symbol_search
*p
;
3890 struct cleanup
*old_chain
;
3891 char *string
= NULL
;
3893 char **files
= NULL
, *file_name
;
3898 char *colon
= strchr (regexp
, ':');
3900 if (colon
&& *(colon
+ 1) != ':')
3904 colon_index
= colon
- regexp
;
3905 file_name
= alloca (colon_index
+ 1);
3906 memcpy (file_name
, regexp
, colon_index
);
3907 file_name
[colon_index
--] = 0;
3908 while (isspace (file_name
[colon_index
]))
3909 file_name
[colon_index
--] = 0;
3913 while (isspace (*regexp
)) regexp
++;
3917 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3918 old_chain
= make_cleanup_free_search_symbols (ss
);
3919 make_cleanup (free_current_contents
, &string
);
3921 start_rbreak_breakpoints ();
3922 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3923 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3925 if (p
->msymbol
== NULL
)
3927 int newlen
= (strlen (p
->symtab
->filename
)
3928 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3933 string
= xrealloc (string
, newlen
);
3936 strcpy (string
, p
->symtab
->filename
);
3937 strcat (string
, ":'");
3938 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3939 strcat (string
, "'");
3940 break_command (string
, from_tty
);
3941 print_symbol_info (FUNCTIONS_DOMAIN
,
3945 p
->symtab
->filename
);
3949 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3953 string
= xrealloc (string
, newlen
);
3956 strcpy (string
, "'");
3957 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3958 strcat (string
, "'");
3960 break_command (string
, from_tty
);
3961 printf_filtered ("<function, no debug info> %s;\n",
3962 SYMBOL_PRINT_NAME (p
->msymbol
));
3966 do_cleanups (old_chain
);
3970 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3972 Either sym_text[sym_text_len] != '(' and then we search for any
3973 symbol starting with SYM_TEXT text.
3975 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3976 be terminated at that point. Partial symbol tables do not have parameters
3980 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
3982 int (*ncmp
) (const char *, const char *, size_t);
3984 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3986 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
3989 if (sym_text
[sym_text_len
] == '(')
3991 /* User searches for `name(someth...'. Require NAME to be terminated.
3992 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3993 present but accept even parameters presence. In this case this
3994 function is in fact strcmp_iw but whitespace skipping is not supported
3995 for tab completion. */
3997 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4004 /* Free any memory associated with a completion list. */
4007 free_completion_list (VEC (char_ptr
) **list_ptr
)
4012 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4014 VEC_free (char_ptr
, *list_ptr
);
4017 /* Callback for make_cleanup. */
4020 do_free_completion_list (void *list
)
4022 free_completion_list (list
);
4025 /* Helper routine for make_symbol_completion_list. */
4027 static VEC (char_ptr
) *return_val
;
4029 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4030 completion_list_add_name \
4031 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4033 /* Test to see if the symbol specified by SYMNAME (which is already
4034 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4035 characters. If so, add it to the current completion list. */
4038 completion_list_add_name (const char *symname
,
4039 const char *sym_text
, int sym_text_len
,
4040 const char *text
, const char *word
)
4044 /* Clip symbols that cannot match. */
4045 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4048 /* We have a match for a completion, so add SYMNAME to the current list
4049 of matches. Note that the name is moved to freshly malloc'd space. */
4054 if (word
== sym_text
)
4056 new = xmalloc (strlen (symname
) + 5);
4057 strcpy (new, symname
);
4059 else if (word
> sym_text
)
4061 /* Return some portion of symname. */
4062 new = xmalloc (strlen (symname
) + 5);
4063 strcpy (new, symname
+ (word
- sym_text
));
4067 /* Return some of SYM_TEXT plus symname. */
4068 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4069 strncpy (new, word
, sym_text
- word
);
4070 new[sym_text
- word
] = '\0';
4071 strcat (new, symname
);
4074 VEC_safe_push (char_ptr
, return_val
, new);
4078 /* ObjC: In case we are completing on a selector, look as the msymbol
4079 again and feed all the selectors into the mill. */
4082 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4083 const char *sym_text
, int sym_text_len
,
4084 const char *text
, const char *word
)
4086 static char *tmp
= NULL
;
4087 static unsigned int tmplen
= 0;
4089 const char *method
, *category
, *selector
;
4092 method
= SYMBOL_NATURAL_NAME (msymbol
);
4094 /* Is it a method? */
4095 if ((method
[0] != '-') && (method
[0] != '+'))
4098 if (sym_text
[0] == '[')
4099 /* Complete on shortened method method. */
4100 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4102 while ((strlen (method
) + 1) >= tmplen
)
4108 tmp
= xrealloc (tmp
, tmplen
);
4110 selector
= strchr (method
, ' ');
4111 if (selector
!= NULL
)
4114 category
= strchr (method
, '(');
4116 if ((category
!= NULL
) && (selector
!= NULL
))
4118 memcpy (tmp
, method
, (category
- method
));
4119 tmp
[category
- method
] = ' ';
4120 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4121 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4122 if (sym_text
[0] == '[')
4123 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4126 if (selector
!= NULL
)
4128 /* Complete on selector only. */
4129 strcpy (tmp
, selector
);
4130 tmp2
= strchr (tmp
, ']');
4134 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4138 /* Break the non-quoted text based on the characters which are in
4139 symbols. FIXME: This should probably be language-specific. */
4142 language_search_unquoted_string (char *text
, char *p
)
4144 for (; p
> text
; --p
)
4146 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
4150 if ((current_language
->la_language
== language_objc
))
4152 if (p
[-1] == ':') /* Might be part of a method name. */
4154 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
4155 p
-= 2; /* Beginning of a method name. */
4156 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
4157 { /* Might be part of a method name. */
4160 /* Seeing a ' ' or a '(' is not conclusive evidence
4161 that we are in the middle of a method name. However,
4162 finding "-[" or "+[" should be pretty un-ambiguous.
4163 Unfortunately we have to find it now to decide. */
4166 if (isalnum (t
[-1]) || t
[-1] == '_' ||
4167 t
[-1] == ' ' || t
[-1] == ':' ||
4168 t
[-1] == '(' || t
[-1] == ')')
4173 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
4174 p
= t
- 2; /* Method name detected. */
4175 /* Else we leave with p unchanged. */
4185 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
4186 int sym_text_len
, char *text
, char *word
)
4188 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
4190 struct type
*t
= SYMBOL_TYPE (sym
);
4191 enum type_code c
= TYPE_CODE (t
);
4194 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
4195 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
4196 if (TYPE_FIELD_NAME (t
, j
))
4197 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
4198 sym_text
, sym_text_len
, text
, word
);
4202 /* Type of the user_data argument passed to add_macro_name or
4203 expand_partial_symbol_name. The contents are simply whatever is
4204 needed by completion_list_add_name. */
4205 struct add_name_data
4213 /* A callback used with macro_for_each and macro_for_each_in_scope.
4214 This adds a macro's name to the current completion list. */
4217 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4218 struct macro_source_file
*ignore2
, int ignore3
,
4221 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4223 completion_list_add_name ((char *) name
,
4224 datum
->sym_text
, datum
->sym_text_len
,
4225 datum
->text
, datum
->word
);
4228 /* A callback for expand_partial_symbol_names. */
4231 expand_partial_symbol_name (const char *name
, void *user_data
)
4233 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4235 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4239 default_make_symbol_completion_list_break_on (char *text
, char *word
,
4240 const char *break_on
,
4241 enum type_code code
)
4243 /* Problem: All of the symbols have to be copied because readline
4244 frees them. I'm not going to worry about this; hopefully there
4245 won't be that many. */
4249 struct minimal_symbol
*msymbol
;
4250 struct objfile
*objfile
;
4252 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4253 struct block_iterator iter
;
4254 /* The symbol we are completing on. Points in same buffer as text. */
4256 /* Length of sym_text. */
4258 struct add_name_data datum
;
4259 struct cleanup
*back_to
;
4261 /* Now look for the symbol we are supposed to complete on. */
4265 char *quote_pos
= NULL
;
4267 /* First see if this is a quoted string. */
4269 for (p
= text
; *p
!= '\0'; ++p
)
4271 if (quote_found
!= '\0')
4273 if (*p
== quote_found
)
4274 /* Found close quote. */
4276 else if (*p
== '\\' && p
[1] == quote_found
)
4277 /* A backslash followed by the quote character
4278 doesn't end the string. */
4281 else if (*p
== '\'' || *p
== '"')
4287 if (quote_found
== '\'')
4288 /* A string within single quotes can be a symbol, so complete on it. */
4289 sym_text
= quote_pos
+ 1;
4290 else if (quote_found
== '"')
4291 /* A double-quoted string is never a symbol, nor does it make sense
4292 to complete it any other way. */
4298 /* It is not a quoted string. Break it based on the characters
4299 which are in symbols. */
4302 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4303 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4312 sym_text_len
= strlen (sym_text
);
4314 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4316 if (current_language
->la_language
== language_cplus
4317 || current_language
->la_language
== language_java
4318 || current_language
->la_language
== language_fortran
)
4320 /* These languages may have parameters entered by user but they are never
4321 present in the partial symbol tables. */
4323 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4326 sym_text_len
= cs
- sym_text
;
4328 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4331 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4333 datum
.sym_text
= sym_text
;
4334 datum
.sym_text_len
= sym_text_len
;
4338 /* Look through the partial symtabs for all symbols which begin
4339 by matching SYM_TEXT. Expand all CUs that you find to the list.
4340 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4341 expand_partial_symbol_names (expand_partial_symbol_name
, &datum
);
4343 /* At this point scan through the misc symbol vectors and add each
4344 symbol you find to the list. Eventually we want to ignore
4345 anything that isn't a text symbol (everything else will be
4346 handled by the psymtab code above). */
4348 if (code
== TYPE_CODE_UNDEF
)
4350 ALL_MSYMBOLS (objfile
, msymbol
)
4353 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
4356 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
4361 /* Search upwards from currently selected frame (so that we can
4362 complete on local vars). Also catch fields of types defined in
4363 this places which match our text string. Only complete on types
4364 visible from current context. */
4366 b
= get_selected_block (0);
4367 surrounding_static_block
= block_static_block (b
);
4368 surrounding_global_block
= block_global_block (b
);
4369 if (surrounding_static_block
!= NULL
)
4370 while (b
!= surrounding_static_block
)
4374 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4376 if (code
== TYPE_CODE_UNDEF
)
4378 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4380 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4383 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4384 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
4385 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4389 /* Stop when we encounter an enclosing function. Do not stop for
4390 non-inlined functions - the locals of the enclosing function
4391 are in scope for a nested function. */
4392 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4394 b
= BLOCK_SUPERBLOCK (b
);
4397 /* Add fields from the file's types; symbols will be added below. */
4399 if (code
== TYPE_CODE_UNDEF
)
4401 if (surrounding_static_block
!= NULL
)
4402 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4403 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4405 if (surrounding_global_block
!= NULL
)
4406 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4407 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4410 /* Go through the symtabs and check the externs and statics for
4411 symbols which match. */
4413 ALL_PRIMARY_SYMTABS (objfile
, s
)
4416 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4417 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4419 if (code
== TYPE_CODE_UNDEF
4420 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4421 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4422 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4426 ALL_PRIMARY_SYMTABS (objfile
, s
)
4429 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4430 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4432 if (code
== TYPE_CODE_UNDEF
4433 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4434 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4435 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4439 /* Skip macros if we are completing a struct tag -- arguable but
4440 usually what is expected. */
4441 if (current_language
->la_macro_expansion
== macro_expansion_c
4442 && code
== TYPE_CODE_UNDEF
)
4444 struct macro_scope
*scope
;
4446 /* Add any macros visible in the default scope. Note that this
4447 may yield the occasional wrong result, because an expression
4448 might be evaluated in a scope other than the default. For
4449 example, if the user types "break file:line if <TAB>", the
4450 resulting expression will be evaluated at "file:line" -- but
4451 at there does not seem to be a way to detect this at
4453 scope
= default_macro_scope ();
4456 macro_for_each_in_scope (scope
->file
, scope
->line
,
4457 add_macro_name
, &datum
);
4461 /* User-defined macros are always visible. */
4462 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4465 discard_cleanups (back_to
);
4466 return (return_val
);
4470 default_make_symbol_completion_list (char *text
, char *word
,
4471 enum type_code code
)
4473 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
4476 /* Return a vector of all symbols (regardless of class) which begin by
4477 matching TEXT. If the answer is no symbols, then the return value
4481 make_symbol_completion_list (char *text
, char *word
)
4483 return current_language
->la_make_symbol_completion_list (text
, word
,
4487 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4488 symbols whose type code is CODE. */
4491 make_symbol_completion_type (char *text
, char *word
, enum type_code code
)
4493 gdb_assert (code
== TYPE_CODE_UNION
4494 || code
== TYPE_CODE_STRUCT
4495 || code
== TYPE_CODE_CLASS
4496 || code
== TYPE_CODE_ENUM
);
4497 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
4500 /* Like make_symbol_completion_list, but suitable for use as a
4501 completion function. */
4504 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4505 char *text
, char *word
)
4507 return make_symbol_completion_list (text
, word
);
4510 /* Like make_symbol_completion_list, but returns a list of symbols
4511 defined in a source file FILE. */
4514 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
4519 struct block_iterator iter
;
4520 /* The symbol we are completing on. Points in same buffer as text. */
4522 /* Length of sym_text. */
4525 /* Now look for the symbol we are supposed to complete on.
4526 FIXME: This should be language-specific. */
4530 char *quote_pos
= NULL
;
4532 /* First see if this is a quoted string. */
4534 for (p
= text
; *p
!= '\0'; ++p
)
4536 if (quote_found
!= '\0')
4538 if (*p
== quote_found
)
4539 /* Found close quote. */
4541 else if (*p
== '\\' && p
[1] == quote_found
)
4542 /* A backslash followed by the quote character
4543 doesn't end the string. */
4546 else if (*p
== '\'' || *p
== '"')
4552 if (quote_found
== '\'')
4553 /* A string within single quotes can be a symbol, so complete on it. */
4554 sym_text
= quote_pos
+ 1;
4555 else if (quote_found
== '"')
4556 /* A double-quoted string is never a symbol, nor does it make sense
4557 to complete it any other way. */
4563 /* Not a quoted string. */
4564 sym_text
= language_search_unquoted_string (text
, p
);
4568 sym_text_len
= strlen (sym_text
);
4572 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4574 s
= lookup_symtab (srcfile
);
4577 /* Maybe they typed the file with leading directories, while the
4578 symbol tables record only its basename. */
4579 const char *tail
= lbasename (srcfile
);
4582 s
= lookup_symtab (tail
);
4585 /* If we have no symtab for that file, return an empty list. */
4587 return (return_val
);
4589 /* Go through this symtab and check the externs and statics for
4590 symbols which match. */
4592 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4593 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4595 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4598 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4599 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4601 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4604 return (return_val
);
4607 /* A helper function for make_source_files_completion_list. It adds
4608 another file name to a list of possible completions, growing the
4609 list as necessary. */
4612 add_filename_to_list (const char *fname
, char *text
, char *word
,
4613 VEC (char_ptr
) **list
)
4616 size_t fnlen
= strlen (fname
);
4620 /* Return exactly fname. */
4621 new = xmalloc (fnlen
+ 5);
4622 strcpy (new, fname
);
4624 else if (word
> text
)
4626 /* Return some portion of fname. */
4627 new = xmalloc (fnlen
+ 5);
4628 strcpy (new, fname
+ (word
- text
));
4632 /* Return some of TEXT plus fname. */
4633 new = xmalloc (fnlen
+ (text
- word
) + 5);
4634 strncpy (new, word
, text
- word
);
4635 new[text
- word
] = '\0';
4636 strcat (new, fname
);
4638 VEC_safe_push (char_ptr
, *list
, new);
4642 not_interesting_fname (const char *fname
)
4644 static const char *illegal_aliens
[] = {
4645 "_globals_", /* inserted by coff_symtab_read */
4650 for (i
= 0; illegal_aliens
[i
]; i
++)
4652 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4658 /* An object of this type is passed as the user_data argument to
4659 map_partial_symbol_filenames. */
4660 struct add_partial_filename_data
4662 struct filename_seen_cache
*filename_seen_cache
;
4666 VEC (char_ptr
) **list
;
4669 /* A callback for map_partial_symbol_filenames. */
4672 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4675 struct add_partial_filename_data
*data
= user_data
;
4677 if (not_interesting_fname (filename
))
4679 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
4680 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4682 /* This file matches for a completion; add it to the
4683 current list of matches. */
4684 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
4688 const char *base_name
= lbasename (filename
);
4690 if (base_name
!= filename
4691 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
4692 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4693 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
4697 /* Return a vector of all source files whose names begin with matching
4698 TEXT. The file names are looked up in the symbol tables of this
4699 program. If the answer is no matchess, then the return value is
4703 make_source_files_completion_list (char *text
, char *word
)
4706 struct objfile
*objfile
;
4707 size_t text_len
= strlen (text
);
4708 VEC (char_ptr
) *list
= NULL
;
4709 const char *base_name
;
4710 struct add_partial_filename_data datum
;
4711 struct filename_seen_cache
*filename_seen_cache
;
4712 struct cleanup
*back_to
, *cache_cleanup
;
4714 if (!have_full_symbols () && !have_partial_symbols ())
4717 back_to
= make_cleanup (do_free_completion_list
, &list
);
4719 filename_seen_cache
= create_filename_seen_cache ();
4720 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
4721 filename_seen_cache
);
4723 ALL_SYMTABS (objfile
, s
)
4725 if (not_interesting_fname (s
->filename
))
4727 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
4728 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4730 /* This file matches for a completion; add it to the current
4732 add_filename_to_list (s
->filename
, text
, word
, &list
);
4736 /* NOTE: We allow the user to type a base name when the
4737 debug info records leading directories, but not the other
4738 way around. This is what subroutines of breakpoint
4739 command do when they parse file names. */
4740 base_name
= lbasename (s
->filename
);
4741 if (base_name
!= s
->filename
4742 && !filename_seen (filename_seen_cache
, base_name
, 1)
4743 && filename_ncmp (base_name
, text
, text_len
) == 0)
4744 add_filename_to_list (base_name
, text
, word
, &list
);
4748 datum
.filename_seen_cache
= filename_seen_cache
;
4751 datum
.text_len
= text_len
;
4753 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4754 0 /*need_fullname*/);
4756 do_cleanups (cache_cleanup
);
4757 discard_cleanups (back_to
);
4762 /* Determine if PC is in the prologue of a function. The prologue is the area
4763 between the first instruction of a function, and the first executable line.
4764 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4766 If non-zero, func_start is where we think the prologue starts, possibly
4767 by previous examination of symbol table information. */
4770 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4772 struct symtab_and_line sal
;
4773 CORE_ADDR func_addr
, func_end
;
4775 /* We have several sources of information we can consult to figure
4777 - Compilers usually emit line number info that marks the prologue
4778 as its own "source line". So the ending address of that "line"
4779 is the end of the prologue. If available, this is the most
4781 - The minimal symbols and partial symbols, which can usually tell
4782 us the starting and ending addresses of a function.
4783 - If we know the function's start address, we can call the
4784 architecture-defined gdbarch_skip_prologue function to analyze the
4785 instruction stream and guess where the prologue ends.
4786 - Our `func_start' argument; if non-zero, this is the caller's
4787 best guess as to the function's entry point. At the time of
4788 this writing, handle_inferior_event doesn't get this right, so
4789 it should be our last resort. */
4791 /* Consult the partial symbol table, to find which function
4793 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4795 CORE_ADDR prologue_end
;
4797 /* We don't even have minsym information, so fall back to using
4798 func_start, if given. */
4800 return 1; /* We *might* be in a prologue. */
4802 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4804 return func_start
<= pc
&& pc
< prologue_end
;
4807 /* If we have line number information for the function, that's
4808 usually pretty reliable. */
4809 sal
= find_pc_line (func_addr
, 0);
4811 /* Now sal describes the source line at the function's entry point,
4812 which (by convention) is the prologue. The end of that "line",
4813 sal.end, is the end of the prologue.
4815 Note that, for functions whose source code is all on a single
4816 line, the line number information doesn't always end up this way.
4817 So we must verify that our purported end-of-prologue address is
4818 *within* the function, not at its start or end. */
4820 || sal
.end
<= func_addr
4821 || func_end
<= sal
.end
)
4823 /* We don't have any good line number info, so use the minsym
4824 information, together with the architecture-specific prologue
4826 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4828 return func_addr
<= pc
&& pc
< prologue_end
;
4831 /* We have line number info, and it looks good. */
4832 return func_addr
<= pc
&& pc
< sal
.end
;
4835 /* Given PC at the function's start address, attempt to find the
4836 prologue end using SAL information. Return zero if the skip fails.
4838 A non-optimized prologue traditionally has one SAL for the function
4839 and a second for the function body. A single line function has
4840 them both pointing at the same line.
4842 An optimized prologue is similar but the prologue may contain
4843 instructions (SALs) from the instruction body. Need to skip those
4844 while not getting into the function body.
4846 The functions end point and an increasing SAL line are used as
4847 indicators of the prologue's endpoint.
4849 This code is based on the function refine_prologue_limit
4853 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4855 struct symtab_and_line prologue_sal
;
4860 /* Get an initial range for the function. */
4861 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4862 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4864 prologue_sal
= find_pc_line (start_pc
, 0);
4865 if (prologue_sal
.line
!= 0)
4867 /* For languages other than assembly, treat two consecutive line
4868 entries at the same address as a zero-instruction prologue.
4869 The GNU assembler emits separate line notes for each instruction
4870 in a multi-instruction macro, but compilers generally will not
4872 if (prologue_sal
.symtab
->language
!= language_asm
)
4874 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4877 /* Skip any earlier lines, and any end-of-sequence marker
4878 from a previous function. */
4879 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4880 || linetable
->item
[idx
].line
== 0)
4883 if (idx
+1 < linetable
->nitems
4884 && linetable
->item
[idx
+1].line
!= 0
4885 && linetable
->item
[idx
+1].pc
== start_pc
)
4889 /* If there is only one sal that covers the entire function,
4890 then it is probably a single line function, like
4892 if (prologue_sal
.end
>= end_pc
)
4895 while (prologue_sal
.end
< end_pc
)
4897 struct symtab_and_line sal
;
4899 sal
= find_pc_line (prologue_sal
.end
, 0);
4902 /* Assume that a consecutive SAL for the same (or larger)
4903 line mark the prologue -> body transition. */
4904 if (sal
.line
>= prologue_sal
.line
)
4907 /* The line number is smaller. Check that it's from the
4908 same function, not something inlined. If it's inlined,
4909 then there is no point comparing the line numbers. */
4910 bl
= block_for_pc (prologue_sal
.end
);
4913 if (block_inlined_p (bl
))
4915 if (BLOCK_FUNCTION (bl
))
4920 bl
= BLOCK_SUPERBLOCK (bl
);
4925 /* The case in which compiler's optimizer/scheduler has
4926 moved instructions into the prologue. We look ahead in
4927 the function looking for address ranges whose
4928 corresponding line number is less the first one that we
4929 found for the function. This is more conservative then
4930 refine_prologue_limit which scans a large number of SALs
4931 looking for any in the prologue. */
4936 if (prologue_sal
.end
< end_pc
)
4937 /* Return the end of this line, or zero if we could not find a
4939 return prologue_sal
.end
;
4941 /* Don't return END_PC, which is past the end of the function. */
4942 return prologue_sal
.pc
;
4946 static char *name_of_main
;
4947 enum language language_of_main
= language_unknown
;
4950 set_main_name (const char *name
)
4952 if (name_of_main
!= NULL
)
4954 xfree (name_of_main
);
4955 name_of_main
= NULL
;
4956 language_of_main
= language_unknown
;
4960 name_of_main
= xstrdup (name
);
4961 language_of_main
= language_unknown
;
4965 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4969 find_main_name (void)
4971 const char *new_main_name
;
4973 /* Try to see if the main procedure is in Ada. */
4974 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4975 be to add a new method in the language vector, and call this
4976 method for each language until one of them returns a non-empty
4977 name. This would allow us to remove this hard-coded call to
4978 an Ada function. It is not clear that this is a better approach
4979 at this point, because all methods need to be written in a way
4980 such that false positives never be returned. For instance, it is
4981 important that a method does not return a wrong name for the main
4982 procedure if the main procedure is actually written in a different
4983 language. It is easy to guaranty this with Ada, since we use a
4984 special symbol generated only when the main in Ada to find the name
4985 of the main procedure. It is difficult however to see how this can
4986 be guarantied for languages such as C, for instance. This suggests
4987 that order of call for these methods becomes important, which means
4988 a more complicated approach. */
4989 new_main_name
= ada_main_name ();
4990 if (new_main_name
!= NULL
)
4992 set_main_name (new_main_name
);
4996 new_main_name
= go_main_name ();
4997 if (new_main_name
!= NULL
)
4999 set_main_name (new_main_name
);
5003 new_main_name
= pascal_main_name ();
5004 if (new_main_name
!= NULL
)
5006 set_main_name (new_main_name
);
5010 /* The languages above didn't identify the name of the main procedure.
5011 Fallback to "main". */
5012 set_main_name ("main");
5018 if (name_of_main
== NULL
)
5021 return name_of_main
;
5024 /* Handle ``executable_changed'' events for the symtab module. */
5027 symtab_observer_executable_changed (void)
5029 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5030 set_main_name (NULL
);
5033 /* Return 1 if the supplied producer string matches the ARM RealView
5034 compiler (armcc). */
5037 producer_is_realview (const char *producer
)
5039 static const char *const arm_idents
[] = {
5040 "ARM C Compiler, ADS",
5041 "Thumb C Compiler, ADS",
5042 "ARM C++ Compiler, ADS",
5043 "Thumb C++ Compiler, ADS",
5044 "ARM/Thumb C/C++ Compiler, RVCT",
5045 "ARM C/C++ Compiler, RVCT"
5049 if (producer
== NULL
)
5052 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5053 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
5060 _initialize_symtab (void)
5062 add_info ("variables", variables_info
, _("\
5063 All global and static variable names, or those matching REGEXP."));
5065 add_com ("whereis", class_info
, variables_info
, _("\
5066 All global and static variable names, or those matching REGEXP."));
5068 add_info ("functions", functions_info
,
5069 _("All function names, or those matching REGEXP."));
5071 /* FIXME: This command has at least the following problems:
5072 1. It prints builtin types (in a very strange and confusing fashion).
5073 2. It doesn't print right, e.g. with
5074 typedef struct foo *FOO
5075 type_print prints "FOO" when we want to make it (in this situation)
5076 print "struct foo *".
5077 I also think "ptype" or "whatis" is more likely to be useful (but if
5078 there is much disagreement "info types" can be fixed). */
5079 add_info ("types", types_info
,
5080 _("All type names, or those matching REGEXP."));
5082 add_info ("sources", sources_info
,
5083 _("Source files in the program."));
5085 add_com ("rbreak", class_breakpoint
, rbreak_command
,
5086 _("Set a breakpoint for all functions matching REGEXP."));
5090 add_com ("lf", class_info
, sources_info
,
5091 _("Source files in the program"));
5092 add_com ("lg", class_info
, variables_info
, _("\
5093 All global and static variable names, or those matching REGEXP."));
5096 add_setshow_enum_cmd ("multiple-symbols", no_class
,
5097 multiple_symbols_modes
, &multiple_symbols_mode
,
5099 Set the debugger behavior when more than one symbol are possible matches\n\
5100 in an expression."), _("\
5101 Show how the debugger handles ambiguities in expressions."), _("\
5102 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5103 NULL
, NULL
, &setlist
, &showlist
);
5105 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
5106 &basenames_may_differ
, _("\
5107 Set whether a source file may have multiple base names."), _("\
5108 Show whether a source file may have multiple base names."), _("\
5109 (A \"base name\" is the name of a file with the directory part removed.\n\
5110 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5111 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5112 before comparing them. Canonicalization is an expensive operation,\n\
5113 but it allows the same file be known by more than one base name.\n\
5114 If not set (the default), all source files are assumed to have just\n\
5115 one base name, and gdb will do file name comparisons more efficiently."),
5117 &setlist
, &showlist
);
5119 add_setshow_boolean_cmd ("symtab-create", no_class
, &symtab_create_debug
,
5120 _("Set debugging of symbol table creation."),
5121 _("Show debugging of symbol table creation."), _("\
5122 When enabled, debugging messages are printed when building symbol tables."),
5125 &setdebuglist
, &showdebuglist
);
5127 observer_attach_executable_changed (symtab_observer_executable_changed
);