1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "gdb_regex.h"
31 #include "expression.h"
36 #include "filenames.h" /* for FILENAME_CMP */
37 #include "objc-lang.h"
43 #include "cli/cli-utils.h"
47 #include "gdb_obstack.h"
49 #include "dictionary.h"
51 #include <sys/types.h>
53 #include "gdb_string.h"
57 #include "cp-support.h"
59 #include "gdb_assert.h"
62 #include "macroscope.h"
65 #include "parser-defs.h"
67 /* Prototypes for local functions */
69 static void rbreak_command (char *, int);
71 static void types_info (char *, int);
73 static void functions_info (char *, int);
75 static void variables_info (char *, int);
77 static void sources_info (char *, int);
79 static int find_line_common (struct linetable
*, int, int *, int);
81 static struct symbol
*lookup_symbol_aux (const char *name
,
82 const struct block
*block
,
83 const domain_enum domain
,
84 enum language language
,
85 struct field_of_this_result
*is_a_field_of_this
);
88 struct symbol
*lookup_symbol_aux_local (const char *name
,
89 const struct block
*block
,
90 const domain_enum domain
,
91 enum language language
);
94 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
96 const domain_enum domain
);
99 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
102 const domain_enum domain
);
104 static void print_msymbol_info (struct minimal_symbol
*);
106 void _initialize_symtab (void);
110 /* When non-zero, print debugging messages related to symtab creation. */
111 int symtab_create_debug
= 0;
113 /* Non-zero if a file may be known by two different basenames.
114 This is the uncommon case, and significantly slows down gdb.
115 Default set to "off" to not slow down the common case. */
116 int basenames_may_differ
= 0;
118 /* Allow the user to configure the debugger behavior with respect
119 to multiple-choice menus when more than one symbol matches during
122 const char multiple_symbols_ask
[] = "ask";
123 const char multiple_symbols_all
[] = "all";
124 const char multiple_symbols_cancel
[] = "cancel";
125 static const char *const multiple_symbols_modes
[] =
127 multiple_symbols_ask
,
128 multiple_symbols_all
,
129 multiple_symbols_cancel
,
132 static const char *multiple_symbols_mode
= multiple_symbols_all
;
134 /* Read-only accessor to AUTO_SELECT_MODE. */
137 multiple_symbols_select_mode (void)
139 return multiple_symbols_mode
;
142 /* Block in which the most recently searched-for symbol was found.
143 Might be better to make this a parameter to lookup_symbol and
146 const struct block
*block_found
;
148 /* See whether FILENAME matches SEARCH_NAME using the rule that we
149 advertise to the user. (The manual's description of linespecs
150 describes what we advertise). Returns true if they match, false
154 compare_filenames_for_search (const char *filename
, const char *search_name
)
156 int len
= strlen (filename
);
157 size_t search_len
= strlen (search_name
);
159 if (len
< search_len
)
162 /* The tail of FILENAME must match. */
163 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
166 /* Either the names must completely match, or the character
167 preceding the trailing SEARCH_NAME segment of FILENAME must be a
170 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
171 cannot match FILENAME "/path//dir/file.c" - as user has requested
172 absolute path. The sama applies for "c:\file.c" possibly
173 incorrectly hypothetically matching "d:\dir\c:\file.c".
175 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
176 compatible with SEARCH_NAME "file.c". In such case a compiler had
177 to put the "c:file.c" name into debug info. Such compatibility
178 works only on GDB built for DOS host. */
179 return (len
== search_len
180 || (!IS_ABSOLUTE_PATH (search_name
)
181 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
182 || (HAS_DRIVE_SPEC (filename
)
183 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
186 /* Check for a symtab of a specific name by searching some symtabs.
187 This is a helper function for callbacks of iterate_over_symtabs.
189 The return value, NAME, REAL_PATH, CALLBACK, and DATA
190 are identical to the `map_symtabs_matching_filename' method of
191 quick_symbol_functions.
193 FIRST and AFTER_LAST indicate the range of symtabs to search.
194 AFTER_LAST is one past the last symtab to search; NULL means to
195 search until the end of the list. */
198 iterate_over_some_symtabs (const char *name
,
199 const char *real_path
,
200 int (*callback
) (struct symtab
*symtab
,
203 struct symtab
*first
,
204 struct symtab
*after_last
)
206 struct symtab
*s
= NULL
;
207 const char* base_name
= lbasename (name
);
209 for (s
= first
; s
!= NULL
&& s
!= after_last
; s
= s
->next
)
211 if (compare_filenames_for_search (s
->filename
, name
))
213 if (callback (s
, data
))
218 /* Before we invoke realpath, which can get expensive when many
219 files are involved, do a quick comparison of the basenames. */
220 if (! basenames_may_differ
221 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
224 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
226 if (callback (s
, data
))
231 /* If the user gave us an absolute path, try to find the file in
232 this symtab and use its absolute path. */
234 if (real_path
!= NULL
)
236 const char *fullname
= symtab_to_fullname (s
);
238 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
239 gdb_assert (IS_ABSOLUTE_PATH (name
));
240 if (FILENAME_CMP (real_path
, fullname
) == 0)
242 if (callback (s
, data
))
252 /* Check for a symtab of a specific name; first in symtabs, then in
253 psymtabs. *If* there is no '/' in the name, a match after a '/'
254 in the symtab filename will also work.
256 Calls CALLBACK with each symtab that is found and with the supplied
257 DATA. If CALLBACK returns true, the search stops. */
260 iterate_over_symtabs (const char *name
,
261 int (*callback
) (struct symtab
*symtab
,
265 struct objfile
*objfile
;
266 char *real_path
= NULL
;
267 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
269 /* Here we are interested in canonicalizing an absolute path, not
270 absolutizing a relative path. */
271 if (IS_ABSOLUTE_PATH (name
))
273 real_path
= gdb_realpath (name
);
274 make_cleanup (xfree
, real_path
);
275 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
278 ALL_OBJFILES (objfile
)
280 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
281 objfile
->symtabs
, NULL
))
283 do_cleanups (cleanups
);
288 /* Same search rules as above apply here, but now we look thru the
291 ALL_OBJFILES (objfile
)
294 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
300 do_cleanups (cleanups
);
305 do_cleanups (cleanups
);
308 /* The callback function used by lookup_symtab. */
311 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
313 struct symtab
**result_ptr
= data
;
315 *result_ptr
= symtab
;
319 /* A wrapper for iterate_over_symtabs that returns the first matching
323 lookup_symtab (const char *name
)
325 struct symtab
*result
= NULL
;
327 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
332 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
333 full method name, which consist of the class name (from T), the unadorned
334 method name from METHOD_ID, and the signature for the specific overload,
335 specified by SIGNATURE_ID. Note that this function is g++ specific. */
338 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
340 int mangled_name_len
;
342 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
343 struct fn_field
*method
= &f
[signature_id
];
344 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
345 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
346 const char *newname
= type_name_no_tag (type
);
348 /* Does the form of physname indicate that it is the full mangled name
349 of a constructor (not just the args)? */
350 int is_full_physname_constructor
;
353 int is_destructor
= is_destructor_name (physname
);
354 /* Need a new type prefix. */
355 char *const_prefix
= method
->is_const
? "C" : "";
356 char *volatile_prefix
= method
->is_volatile
? "V" : "";
358 int len
= (newname
== NULL
? 0 : strlen (newname
));
360 /* Nothing to do if physname already contains a fully mangled v3 abi name
361 or an operator name. */
362 if ((physname
[0] == '_' && physname
[1] == 'Z')
363 || is_operator_name (field_name
))
364 return xstrdup (physname
);
366 is_full_physname_constructor
= is_constructor_name (physname
);
368 is_constructor
= is_full_physname_constructor
369 || (newname
&& strcmp (field_name
, newname
) == 0);
372 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
374 if (is_destructor
|| is_full_physname_constructor
)
376 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
377 strcpy (mangled_name
, physname
);
383 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
385 else if (physname
[0] == 't' || physname
[0] == 'Q')
387 /* The physname for template and qualified methods already includes
389 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
395 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
396 volatile_prefix
, len
);
398 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
399 + strlen (buf
) + len
+ strlen (physname
) + 1);
401 mangled_name
= (char *) xmalloc (mangled_name_len
);
403 mangled_name
[0] = '\0';
405 strcpy (mangled_name
, field_name
);
407 strcat (mangled_name
, buf
);
408 /* If the class doesn't have a name, i.e. newname NULL, then we just
409 mangle it using 0 for the length of the class. Thus it gets mangled
410 as something starting with `::' rather than `classname::'. */
412 strcat (mangled_name
, newname
);
414 strcat (mangled_name
, physname
);
415 return (mangled_name
);
418 /* Initialize the cplus_specific structure. 'cplus_specific' should
419 only be allocated for use with cplus symbols. */
422 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
423 struct objfile
*objfile
)
425 /* A language_specific structure should not have been previously
427 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
428 gdb_assert (objfile
!= NULL
);
430 gsymbol
->language_specific
.cplus_specific
=
431 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
434 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
435 correctly allocated. For C++ symbols a cplus_specific struct is
436 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
437 OBJFILE can be NULL. */
440 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
442 struct objfile
*objfile
)
444 if (gsymbol
->language
== language_cplus
)
446 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
447 symbol_init_cplus_specific (gsymbol
, objfile
);
449 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
452 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
455 /* Return the demangled name of GSYMBOL. */
458 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
460 if (gsymbol
->language
== language_cplus
)
462 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
463 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
468 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
472 /* Initialize the language dependent portion of a symbol
473 depending upon the language for the symbol. */
476 symbol_set_language (struct general_symbol_info
*gsymbol
,
477 enum language language
)
479 gsymbol
->language
= language
;
480 if (gsymbol
->language
== language_d
481 || gsymbol
->language
== language_go
482 || gsymbol
->language
== language_java
483 || gsymbol
->language
== language_objc
484 || gsymbol
->language
== language_fortran
)
486 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
488 else if (gsymbol
->language
== language_cplus
)
489 gsymbol
->language_specific
.cplus_specific
= NULL
;
492 memset (&gsymbol
->language_specific
, 0,
493 sizeof (gsymbol
->language_specific
));
497 /* Functions to initialize a symbol's mangled name. */
499 /* Objects of this type are stored in the demangled name hash table. */
500 struct demangled_name_entry
506 /* Hash function for the demangled name hash. */
509 hash_demangled_name_entry (const void *data
)
511 const struct demangled_name_entry
*e
= data
;
513 return htab_hash_string (e
->mangled
);
516 /* Equality function for the demangled name hash. */
519 eq_demangled_name_entry (const void *a
, const void *b
)
521 const struct demangled_name_entry
*da
= a
;
522 const struct demangled_name_entry
*db
= b
;
524 return strcmp (da
->mangled
, db
->mangled
) == 0;
527 /* Create the hash table used for demangled names. Each hash entry is
528 a pair of strings; one for the mangled name and one for the demangled
529 name. The entry is hashed via just the mangled name. */
532 create_demangled_names_hash (struct objfile
*objfile
)
534 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
535 The hash table code will round this up to the next prime number.
536 Choosing a much larger table size wastes memory, and saves only about
537 1% in symbol reading. */
539 objfile
->demangled_names_hash
= htab_create_alloc
540 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
541 NULL
, xcalloc
, xfree
);
544 /* Try to determine the demangled name for a symbol, based on the
545 language of that symbol. If the language is set to language_auto,
546 it will attempt to find any demangling algorithm that works and
547 then set the language appropriately. The returned name is allocated
548 by the demangler and should be xfree'd. */
551 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
554 char *demangled
= NULL
;
556 if (gsymbol
->language
== language_unknown
)
557 gsymbol
->language
= language_auto
;
559 if (gsymbol
->language
== language_objc
560 || gsymbol
->language
== language_auto
)
563 objc_demangle (mangled
, 0);
564 if (demangled
!= NULL
)
566 gsymbol
->language
= language_objc
;
570 if (gsymbol
->language
== language_cplus
571 || gsymbol
->language
== language_auto
)
574 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
575 if (demangled
!= NULL
)
577 gsymbol
->language
= language_cplus
;
581 if (gsymbol
->language
== language_java
)
584 cplus_demangle (mangled
,
585 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
586 if (demangled
!= NULL
)
588 gsymbol
->language
= language_java
;
592 if (gsymbol
->language
== language_d
593 || gsymbol
->language
== language_auto
)
595 demangled
= d_demangle(mangled
, 0);
596 if (demangled
!= NULL
)
598 gsymbol
->language
= language_d
;
602 /* FIXME(dje): Continually adding languages here is clumsy.
603 Better to just call la_demangle if !auto, and if auto then call
604 a utility routine that tries successive languages in turn and reports
605 which one it finds. I realize the la_demangle options may be different
606 for different languages but there's already a FIXME for that. */
607 if (gsymbol
->language
== language_go
608 || gsymbol
->language
== language_auto
)
610 demangled
= go_demangle (mangled
, 0);
611 if (demangled
!= NULL
)
613 gsymbol
->language
= language_go
;
618 /* We could support `gsymbol->language == language_fortran' here to provide
619 module namespaces also for inferiors with only minimal symbol table (ELF
620 symbols). Just the mangling standard is not standardized across compilers
621 and there is no DW_AT_producer available for inferiors with only the ELF
622 symbols to check the mangling kind. */
626 /* Set both the mangled and demangled (if any) names for GSYMBOL based
627 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
628 objfile's obstack; but if COPY_NAME is 0 and if NAME is
629 NUL-terminated, then this function assumes that NAME is already
630 correctly saved (either permanently or with a lifetime tied to the
631 objfile), and it will not be copied.
633 The hash table corresponding to OBJFILE is used, and the memory
634 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
635 so the pointer can be discarded after calling this function. */
637 /* We have to be careful when dealing with Java names: when we run
638 into a Java minimal symbol, we don't know it's a Java symbol, so it
639 gets demangled as a C++ name. This is unfortunate, but there's not
640 much we can do about it: but when demangling partial symbols and
641 regular symbols, we'd better not reuse the wrong demangled name.
642 (See PR gdb/1039.) We solve this by putting a distinctive prefix
643 on Java names when storing them in the hash table. */
645 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
646 don't mind the Java prefix so much: different languages have
647 different demangling requirements, so it's only natural that we
648 need to keep language data around in our demangling cache. But
649 it's not good that the minimal symbol has the wrong demangled name.
650 Unfortunately, I can't think of any easy solution to that
653 #define JAVA_PREFIX "##JAVA$$"
654 #define JAVA_PREFIX_LEN 8
657 symbol_set_names (struct general_symbol_info
*gsymbol
,
658 const char *linkage_name
, int len
, int copy_name
,
659 struct objfile
*objfile
)
661 struct demangled_name_entry
**slot
;
662 /* A 0-terminated copy of the linkage name. */
663 const char *linkage_name_copy
;
664 /* A copy of the linkage name that might have a special Java prefix
665 added to it, for use when looking names up in the hash table. */
666 const char *lookup_name
;
667 /* The length of lookup_name. */
669 struct demangled_name_entry entry
;
671 if (gsymbol
->language
== language_ada
)
673 /* In Ada, we do the symbol lookups using the mangled name, so
674 we can save some space by not storing the demangled name.
676 As a side note, we have also observed some overlap between
677 the C++ mangling and Ada mangling, similarly to what has
678 been observed with Java. Because we don't store the demangled
679 name with the symbol, we don't need to use the same trick
682 gsymbol
->name
= linkage_name
;
685 char *name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
687 memcpy (name
, linkage_name
, len
);
689 gsymbol
->name
= name
;
691 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
696 if (objfile
->demangled_names_hash
== NULL
)
697 create_demangled_names_hash (objfile
);
699 /* The stabs reader generally provides names that are not
700 NUL-terminated; most of the other readers don't do this, so we
701 can just use the given copy, unless we're in the Java case. */
702 if (gsymbol
->language
== language_java
)
706 lookup_len
= len
+ JAVA_PREFIX_LEN
;
707 alloc_name
= alloca (lookup_len
+ 1);
708 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
709 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
710 alloc_name
[lookup_len
] = '\0';
712 lookup_name
= alloc_name
;
713 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
715 else if (linkage_name
[len
] != '\0')
720 alloc_name
= alloca (lookup_len
+ 1);
721 memcpy (alloc_name
, linkage_name
, len
);
722 alloc_name
[lookup_len
] = '\0';
724 lookup_name
= alloc_name
;
725 linkage_name_copy
= alloc_name
;
730 lookup_name
= linkage_name
;
731 linkage_name_copy
= linkage_name
;
734 entry
.mangled
= lookup_name
;
735 slot
= ((struct demangled_name_entry
**)
736 htab_find_slot (objfile
->demangled_names_hash
,
739 /* If this name is not in the hash table, add it. */
741 /* A C version of the symbol may have already snuck into the table.
742 This happens to, e.g., main.init (__go_init_main). Cope. */
743 || (gsymbol
->language
== language_go
744 && (*slot
)->demangled
[0] == '\0'))
746 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
748 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
750 /* Suppose we have demangled_name==NULL, copy_name==0, and
751 lookup_name==linkage_name. In this case, we already have the
752 mangled name saved, and we don't have a demangled name. So,
753 you might think we could save a little space by not recording
754 this in the hash table at all.
756 It turns out that it is actually important to still save such
757 an entry in the hash table, because storing this name gives
758 us better bcache hit rates for partial symbols. */
759 if (!copy_name
&& lookup_name
== linkage_name
)
761 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
762 offsetof (struct demangled_name_entry
,
764 + demangled_len
+ 1);
765 (*slot
)->mangled
= lookup_name
;
771 /* If we must copy the mangled name, put it directly after
772 the demangled name so we can have a single
774 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
775 offsetof (struct demangled_name_entry
,
777 + lookup_len
+ demangled_len
+ 2);
778 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
779 strcpy (mangled_ptr
, lookup_name
);
780 (*slot
)->mangled
= mangled_ptr
;
783 if (demangled_name
!= NULL
)
785 strcpy ((*slot
)->demangled
, demangled_name
);
786 xfree (demangled_name
);
789 (*slot
)->demangled
[0] = '\0';
792 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
793 if ((*slot
)->demangled
[0] != '\0')
794 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
796 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
799 /* Return the source code name of a symbol. In languages where
800 demangling is necessary, this is the demangled name. */
803 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
805 switch (gsymbol
->language
)
812 case language_fortran
:
813 if (symbol_get_demangled_name (gsymbol
) != NULL
)
814 return symbol_get_demangled_name (gsymbol
);
817 if (symbol_get_demangled_name (gsymbol
) != NULL
)
818 return symbol_get_demangled_name (gsymbol
);
820 return ada_decode_symbol (gsymbol
);
825 return gsymbol
->name
;
828 /* Return the demangled name for a symbol based on the language for
829 that symbol. If no demangled name exists, return NULL. */
832 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
834 const char *dem_name
= NULL
;
836 switch (gsymbol
->language
)
843 case language_fortran
:
844 dem_name
= symbol_get_demangled_name (gsymbol
);
847 dem_name
= symbol_get_demangled_name (gsymbol
);
848 if (dem_name
== NULL
)
849 dem_name
= ada_decode_symbol (gsymbol
);
857 /* Return the search name of a symbol---generally the demangled or
858 linkage name of the symbol, depending on how it will be searched for.
859 If there is no distinct demangled name, then returns the same value
860 (same pointer) as SYMBOL_LINKAGE_NAME. */
863 symbol_search_name (const struct general_symbol_info
*gsymbol
)
865 if (gsymbol
->language
== language_ada
)
866 return gsymbol
->name
;
868 return symbol_natural_name (gsymbol
);
871 /* Initialize the structure fields to zero values. */
874 init_sal (struct symtab_and_line
*sal
)
882 sal
->explicit_pc
= 0;
883 sal
->explicit_line
= 0;
888 /* Return 1 if the two sections are the same, or if they could
889 plausibly be copies of each other, one in an original object
890 file and another in a separated debug file. */
893 matching_obj_sections (struct obj_section
*obj_first
,
894 struct obj_section
*obj_second
)
896 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
897 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
900 /* If they're the same section, then they match. */
904 /* If either is NULL, give up. */
905 if (first
== NULL
|| second
== NULL
)
908 /* This doesn't apply to absolute symbols. */
909 if (first
->owner
== NULL
|| second
->owner
== NULL
)
912 /* If they're in the same object file, they must be different sections. */
913 if (first
->owner
== second
->owner
)
916 /* Check whether the two sections are potentially corresponding. They must
917 have the same size, address, and name. We can't compare section indexes,
918 which would be more reliable, because some sections may have been
920 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
923 /* In-memory addresses may start at a different offset, relativize them. */
924 if (bfd_get_section_vma (first
->owner
, first
)
925 - bfd_get_start_address (first
->owner
)
926 != bfd_get_section_vma (second
->owner
, second
)
927 - bfd_get_start_address (second
->owner
))
930 if (bfd_get_section_name (first
->owner
, first
) == NULL
931 || bfd_get_section_name (second
->owner
, second
) == NULL
932 || strcmp (bfd_get_section_name (first
->owner
, first
),
933 bfd_get_section_name (second
->owner
, second
)) != 0)
936 /* Otherwise check that they are in corresponding objfiles. */
939 if (obj
->obfd
== first
->owner
)
941 gdb_assert (obj
!= NULL
);
943 if (obj
->separate_debug_objfile
!= NULL
944 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
946 if (obj
->separate_debug_objfile_backlink
!= NULL
947 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
954 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
956 struct objfile
*objfile
;
957 struct minimal_symbol
*msymbol
;
959 /* If we know that this is not a text address, return failure. This is
960 necessary because we loop based on texthigh and textlow, which do
961 not include the data ranges. */
962 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
964 && (MSYMBOL_TYPE (msymbol
) == mst_data
965 || MSYMBOL_TYPE (msymbol
) == mst_bss
966 || MSYMBOL_TYPE (msymbol
) == mst_abs
967 || MSYMBOL_TYPE (msymbol
) == mst_file_data
968 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
971 ALL_OBJFILES (objfile
)
973 struct symtab
*result
= NULL
;
976 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
985 /* Debug symbols usually don't have section information. We need to dig that
986 out of the minimal symbols and stash that in the debug symbol. */
989 fixup_section (struct general_symbol_info
*ginfo
,
990 CORE_ADDR addr
, struct objfile
*objfile
)
992 struct minimal_symbol
*msym
;
994 /* First, check whether a minimal symbol with the same name exists
995 and points to the same address. The address check is required
996 e.g. on PowerPC64, where the minimal symbol for a function will
997 point to the function descriptor, while the debug symbol will
998 point to the actual function code. */
999 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1002 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
1003 ginfo
->section
= SYMBOL_SECTION (msym
);
1007 /* Static, function-local variables do appear in the linker
1008 (minimal) symbols, but are frequently given names that won't
1009 be found via lookup_minimal_symbol(). E.g., it has been
1010 observed in frv-uclinux (ELF) executables that a static,
1011 function-local variable named "foo" might appear in the
1012 linker symbols as "foo.6" or "foo.3". Thus, there is no
1013 point in attempting to extend the lookup-by-name mechanism to
1014 handle this case due to the fact that there can be multiple
1017 So, instead, search the section table when lookup by name has
1018 failed. The ``addr'' and ``endaddr'' fields may have already
1019 been relocated. If so, the relocation offset (i.e. the
1020 ANOFFSET value) needs to be subtracted from these values when
1021 performing the comparison. We unconditionally subtract it,
1022 because, when no relocation has been performed, the ANOFFSET
1023 value will simply be zero.
1025 The address of the symbol whose section we're fixing up HAS
1026 NOT BEEN adjusted (relocated) yet. It can't have been since
1027 the section isn't yet known and knowing the section is
1028 necessary in order to add the correct relocation value. In
1029 other words, we wouldn't even be in this function (attempting
1030 to compute the section) if it were already known.
1032 Note that it is possible to search the minimal symbols
1033 (subtracting the relocation value if necessary) to find the
1034 matching minimal symbol, but this is overkill and much less
1035 efficient. It is not necessary to find the matching minimal
1036 symbol, only its section.
1038 Note that this technique (of doing a section table search)
1039 can fail when unrelocated section addresses overlap. For
1040 this reason, we still attempt a lookup by name prior to doing
1041 a search of the section table. */
1043 struct obj_section
*s
;
1045 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1047 int idx
= s
->the_bfd_section
->index
;
1048 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1050 if (obj_section_addr (s
) - offset
<= addr
1051 && addr
< obj_section_endaddr (s
) - offset
)
1053 ginfo
->obj_section
= s
;
1054 ginfo
->section
= idx
;
1062 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1069 if (SYMBOL_OBJ_SECTION (sym
))
1072 /* We either have an OBJFILE, or we can get at it from the sym's
1073 symtab. Anything else is a bug. */
1074 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1076 if (objfile
== NULL
)
1077 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1079 /* We should have an objfile by now. */
1080 gdb_assert (objfile
);
1082 switch (SYMBOL_CLASS (sym
))
1086 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1089 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1093 /* Nothing else will be listed in the minsyms -- no use looking
1098 fixup_section (&sym
->ginfo
, addr
, objfile
);
1103 /* Compute the demangled form of NAME as used by the various symbol
1104 lookup functions. The result is stored in *RESULT_NAME. Returns a
1105 cleanup which can be used to clean up the result.
1107 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1108 Normally, Ada symbol lookups are performed using the encoded name
1109 rather than the demangled name, and so it might seem to make sense
1110 for this function to return an encoded version of NAME.
1111 Unfortunately, we cannot do this, because this function is used in
1112 circumstances where it is not appropriate to try to encode NAME.
1113 For instance, when displaying the frame info, we demangle the name
1114 of each parameter, and then perform a symbol lookup inside our
1115 function using that demangled name. In Ada, certain functions
1116 have internally-generated parameters whose name contain uppercase
1117 characters. Encoding those name would result in those uppercase
1118 characters to become lowercase, and thus cause the symbol lookup
1122 demangle_for_lookup (const char *name
, enum language lang
,
1123 const char **result_name
)
1125 char *demangled_name
= NULL
;
1126 const char *modified_name
= NULL
;
1127 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1129 modified_name
= name
;
1131 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1132 lookup, so we can always binary search. */
1133 if (lang
== language_cplus
)
1135 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1138 modified_name
= demangled_name
;
1139 make_cleanup (xfree
, demangled_name
);
1143 /* If we were given a non-mangled name, canonicalize it
1144 according to the language (so far only for C++). */
1145 demangled_name
= cp_canonicalize_string (name
);
1148 modified_name
= demangled_name
;
1149 make_cleanup (xfree
, demangled_name
);
1153 else if (lang
== language_java
)
1155 demangled_name
= cplus_demangle (name
,
1156 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1159 modified_name
= demangled_name
;
1160 make_cleanup (xfree
, demangled_name
);
1163 else if (lang
== language_d
)
1165 demangled_name
= d_demangle (name
, 0);
1168 modified_name
= demangled_name
;
1169 make_cleanup (xfree
, demangled_name
);
1172 else if (lang
== language_go
)
1174 demangled_name
= go_demangle (name
, 0);
1177 modified_name
= demangled_name
;
1178 make_cleanup (xfree
, demangled_name
);
1182 *result_name
= modified_name
;
1186 /* Find the definition for a specified symbol name NAME
1187 in domain DOMAIN, visible from lexical block BLOCK.
1188 Returns the struct symbol pointer, or zero if no symbol is found.
1189 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1190 NAME is a field of the current implied argument `this'. If so set
1191 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1192 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1193 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1195 /* This function (or rather its subordinates) have a bunch of loops and
1196 it would seem to be attractive to put in some QUIT's (though I'm not really
1197 sure whether it can run long enough to be really important). But there
1198 are a few calls for which it would appear to be bad news to quit
1199 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1200 that there is C++ code below which can error(), but that probably
1201 doesn't affect these calls since they are looking for a known
1202 variable and thus can probably assume it will never hit the C++
1206 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1207 const domain_enum domain
, enum language lang
,
1208 struct field_of_this_result
*is_a_field_of_this
)
1210 const char *modified_name
;
1211 struct symbol
*returnval
;
1212 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1214 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1215 is_a_field_of_this
);
1216 do_cleanups (cleanup
);
1221 /* Behave like lookup_symbol_in_language, but performed with the
1222 current language. */
1225 lookup_symbol (const char *name
, const struct block
*block
,
1227 struct field_of_this_result
*is_a_field_of_this
)
1229 return lookup_symbol_in_language (name
, block
, domain
,
1230 current_language
->la_language
,
1231 is_a_field_of_this
);
1234 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1235 found, or NULL if not found. */
1238 lookup_language_this (const struct language_defn
*lang
,
1239 const struct block
*block
)
1241 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1248 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1251 block_found
= block
;
1254 if (BLOCK_FUNCTION (block
))
1256 block
= BLOCK_SUPERBLOCK (block
);
1262 /* Given TYPE, a structure/union,
1263 return 1 if the component named NAME from the ultimate target
1264 structure/union is defined, otherwise, return 0. */
1267 check_field (struct type
*type
, const char *name
,
1268 struct field_of_this_result
*is_a_field_of_this
)
1272 /* The type may be a stub. */
1273 CHECK_TYPEDEF (type
);
1275 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1277 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1279 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1281 is_a_field_of_this
->type
= type
;
1282 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1287 /* C++: If it was not found as a data field, then try to return it
1288 as a pointer to a method. */
1290 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1292 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1294 is_a_field_of_this
->type
= type
;
1295 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1300 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1301 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
1307 /* Behave like lookup_symbol except that NAME is the natural name
1308 (e.g., demangled name) of the symbol that we're looking for. */
1310 static struct symbol
*
1311 lookup_symbol_aux (const char *name
, const struct block
*block
,
1312 const domain_enum domain
, enum language language
,
1313 struct field_of_this_result
*is_a_field_of_this
)
1316 const struct language_defn
*langdef
;
1318 /* Make sure we do something sensible with is_a_field_of_this, since
1319 the callers that set this parameter to some non-null value will
1320 certainly use it later. If we don't set it, the contents of
1321 is_a_field_of_this are undefined. */
1322 if (is_a_field_of_this
!= NULL
)
1323 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
1325 /* Search specified block and its superiors. Don't search
1326 STATIC_BLOCK or GLOBAL_BLOCK. */
1328 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1332 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1333 check to see if NAME is a field of `this'. */
1335 langdef
= language_def (language
);
1337 /* Don't do this check if we are searching for a struct. It will
1338 not be found by check_field, but will be found by other
1340 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
1342 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1346 struct type
*t
= sym
->type
;
1348 /* I'm not really sure that type of this can ever
1349 be typedefed; just be safe. */
1351 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1352 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1353 t
= TYPE_TARGET_TYPE (t
);
1355 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1356 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1357 error (_("Internal error: `%s' is not an aggregate"),
1358 langdef
->la_name_of_this
);
1360 if (check_field (t
, name
, is_a_field_of_this
))
1365 /* Now do whatever is appropriate for LANGUAGE to look
1366 up static and global variables. */
1368 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1372 /* Now search all static file-level symbols. Not strictly correct,
1373 but more useful than an error. */
1375 return lookup_static_symbol_aux (name
, domain
);
1378 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1379 first, then check the psymtabs. If a psymtab indicates the existence of the
1380 desired name as a file-level static, then do psymtab-to-symtab conversion on
1381 the fly and return the found symbol. */
1384 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1386 struct objfile
*objfile
;
1389 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1393 ALL_OBJFILES (objfile
)
1395 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1403 /* Check to see if the symbol is defined in BLOCK or its superiors.
1404 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1406 static struct symbol
*
1407 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1408 const domain_enum domain
,
1409 enum language language
)
1412 const struct block
*static_block
= block_static_block (block
);
1413 const char *scope
= block_scope (block
);
1415 /* Check if either no block is specified or it's a global block. */
1417 if (static_block
== NULL
)
1420 while (block
!= static_block
)
1422 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1426 if (language
== language_cplus
|| language
== language_fortran
)
1428 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1434 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1436 block
= BLOCK_SUPERBLOCK (block
);
1439 /* We've reached the edge of the function without finding a result. */
1444 /* Look up OBJFILE to BLOCK. */
1447 lookup_objfile_from_block (const struct block
*block
)
1449 struct objfile
*obj
;
1455 block
= block_global_block (block
);
1456 /* Go through SYMTABS. */
1457 ALL_SYMTABS (obj
, s
)
1458 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1460 if (obj
->separate_debug_objfile_backlink
)
1461 obj
= obj
->separate_debug_objfile_backlink
;
1469 /* Look up a symbol in a block; if found, fixup the symbol, and set
1470 block_found appropriately. */
1473 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1474 const domain_enum domain
)
1478 sym
= lookup_block_symbol (block
, name
, domain
);
1481 block_found
= block
;
1482 return fixup_symbol_section (sym
, NULL
);
1488 /* Check all global symbols in OBJFILE in symtabs and
1492 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1494 const domain_enum domain
)
1496 const struct objfile
*objfile
;
1498 struct blockvector
*bv
;
1499 const struct block
*block
;
1502 for (objfile
= main_objfile
;
1504 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1506 /* Go through symtabs. */
1507 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1509 bv
= BLOCKVECTOR (s
);
1510 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1511 sym
= lookup_block_symbol (block
, name
, domain
);
1514 block_found
= block
;
1515 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1519 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1528 /* Check to see if the symbol is defined in one of the OBJFILE's
1529 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1530 depending on whether or not we want to search global symbols or
1533 static struct symbol
*
1534 lookup_symbol_aux_objfile (struct objfile
*objfile
, int block_index
,
1535 const char *name
, const domain_enum domain
)
1537 struct symbol
*sym
= NULL
;
1538 struct blockvector
*bv
;
1539 const struct block
*block
;
1542 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1544 bv
= BLOCKVECTOR (s
);
1545 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1546 sym
= lookup_block_symbol (block
, name
, domain
);
1549 block_found
= block
;
1550 return fixup_symbol_section (sym
, objfile
);
1557 /* Same as lookup_symbol_aux_objfile, except that it searches all
1558 objfiles. Return the first match found. */
1560 static struct symbol
*
1561 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1562 const domain_enum domain
)
1565 struct objfile
*objfile
;
1567 ALL_OBJFILES (objfile
)
1569 sym
= lookup_symbol_aux_objfile (objfile
, block_index
, name
, domain
);
1577 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1578 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1579 and all related objfiles. */
1581 static struct symbol
*
1582 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
1583 const char *linkage_name
,
1586 enum language lang
= current_language
->la_language
;
1587 const char *modified_name
;
1588 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
1590 struct objfile
*main_objfile
, *cur_objfile
;
1592 if (objfile
->separate_debug_objfile_backlink
)
1593 main_objfile
= objfile
->separate_debug_objfile_backlink
;
1595 main_objfile
= objfile
;
1597 for (cur_objfile
= main_objfile
;
1599 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
1603 sym
= lookup_symbol_aux_objfile (cur_objfile
, GLOBAL_BLOCK
,
1604 modified_name
, domain
);
1606 sym
= lookup_symbol_aux_objfile (cur_objfile
, STATIC_BLOCK
,
1607 modified_name
, domain
);
1610 do_cleanups (cleanup
);
1615 do_cleanups (cleanup
);
1619 /* A helper function that throws an exception when a symbol was found
1620 in a psymtab but not in a symtab. */
1622 static void ATTRIBUTE_NORETURN
1623 error_in_psymtab_expansion (int kind
, const char *name
, struct symtab
*symtab
)
1626 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1627 %s may be an inlined function, or may be a template function\n \
1628 (if a template, try specifying an instantiation: %s<type>)."),
1629 kind
== GLOBAL_BLOCK
? "global" : "static",
1630 name
, symtab_to_filename_for_display (symtab
), name
, name
);
1633 /* A helper function for lookup_symbol_aux that interfaces with the
1634 "quick" symbol table functions. */
1636 static struct symbol
*
1637 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1638 const char *name
, const domain_enum domain
)
1640 struct symtab
*symtab
;
1641 struct blockvector
*bv
;
1642 const struct block
*block
;
1647 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1651 bv
= BLOCKVECTOR (symtab
);
1652 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1653 sym
= lookup_block_symbol (block
, name
, domain
);
1655 error_in_psymtab_expansion (kind
, name
, symtab
);
1656 return fixup_symbol_section (sym
, objfile
);
1659 /* A default version of lookup_symbol_nonlocal for use by languages
1660 that can't think of anything better to do. This implements the C
1664 basic_lookup_symbol_nonlocal (const char *name
,
1665 const struct block
*block
,
1666 const domain_enum domain
)
1670 /* NOTE: carlton/2003-05-19: The comments below were written when
1671 this (or what turned into this) was part of lookup_symbol_aux;
1672 I'm much less worried about these questions now, since these
1673 decisions have turned out well, but I leave these comments here
1676 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1677 not it would be appropriate to search the current global block
1678 here as well. (That's what this code used to do before the
1679 is_a_field_of_this check was moved up.) On the one hand, it's
1680 redundant with the lookup_symbol_aux_symtabs search that happens
1681 next. On the other hand, if decode_line_1 is passed an argument
1682 like filename:var, then the user presumably wants 'var' to be
1683 searched for in filename. On the third hand, there shouldn't be
1684 multiple global variables all of which are named 'var', and it's
1685 not like decode_line_1 has ever restricted its search to only
1686 global variables in a single filename. All in all, only
1687 searching the static block here seems best: it's correct and it's
1690 /* NOTE: carlton/2002-12-05: There's also a possible performance
1691 issue here: if you usually search for global symbols in the
1692 current file, then it would be slightly better to search the
1693 current global block before searching all the symtabs. But there
1694 are other factors that have a much greater effect on performance
1695 than that one, so I don't think we should worry about that for
1698 sym
= lookup_symbol_static (name
, block
, domain
);
1702 return lookup_symbol_global (name
, block
, domain
);
1705 /* Lookup a symbol in the static block associated to BLOCK, if there
1706 is one; do nothing if BLOCK is NULL or a global block. */
1709 lookup_symbol_static (const char *name
,
1710 const struct block
*block
,
1711 const domain_enum domain
)
1713 const struct block
*static_block
= block_static_block (block
);
1715 if (static_block
!= NULL
)
1716 return lookup_symbol_aux_block (name
, static_block
, domain
);
1721 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1723 struct global_sym_lookup_data
1725 /* The name of the symbol we are searching for. */
1728 /* The domain to use for our search. */
1731 /* The field where the callback should store the symbol if found.
1732 It should be initialized to NULL before the search is started. */
1733 struct symbol
*result
;
1736 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1737 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1738 OBJFILE. The arguments for the search are passed via CB_DATA,
1739 which in reality is a pointer to struct global_sym_lookup_data. */
1742 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
1745 struct global_sym_lookup_data
*data
=
1746 (struct global_sym_lookup_data
*) cb_data
;
1748 gdb_assert (data
->result
== NULL
);
1750 data
->result
= lookup_symbol_aux_objfile (objfile
, GLOBAL_BLOCK
,
1751 data
->name
, data
->domain
);
1752 if (data
->result
== NULL
)
1753 data
->result
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
,
1754 data
->name
, data
->domain
);
1756 /* If we found a match, tell the iterator to stop. Otherwise,
1758 return (data
->result
!= NULL
);
1761 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1765 lookup_symbol_global (const char *name
,
1766 const struct block
*block
,
1767 const domain_enum domain
)
1769 struct symbol
*sym
= NULL
;
1770 struct objfile
*objfile
= NULL
;
1771 struct global_sym_lookup_data lookup_data
;
1773 /* Call library-specific lookup procedure. */
1774 objfile
= lookup_objfile_from_block (block
);
1775 if (objfile
!= NULL
)
1776 sym
= solib_global_lookup (objfile
, name
, domain
);
1780 memset (&lookup_data
, 0, sizeof (lookup_data
));
1781 lookup_data
.name
= name
;
1782 lookup_data
.domain
= domain
;
1783 gdbarch_iterate_over_objfiles_in_search_order
1784 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
1785 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
1787 return lookup_data
.result
;
1791 symbol_matches_domain (enum language symbol_language
,
1792 domain_enum symbol_domain
,
1795 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1796 A Java class declaration also defines a typedef for the class.
1797 Similarly, any Ada type declaration implicitly defines a typedef. */
1798 if (symbol_language
== language_cplus
1799 || symbol_language
== language_d
1800 || symbol_language
== language_java
1801 || symbol_language
== language_ada
)
1803 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1804 && symbol_domain
== STRUCT_DOMAIN
)
1807 /* For all other languages, strict match is required. */
1808 return (symbol_domain
== domain
);
1811 /* Look up a type named NAME in the struct_domain. The type returned
1812 must not be opaque -- i.e., must have at least one field
1816 lookup_transparent_type (const char *name
)
1818 return current_language
->la_lookup_transparent_type (name
);
1821 /* A helper for basic_lookup_transparent_type that interfaces with the
1822 "quick" symbol table functions. */
1824 static struct type
*
1825 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1828 struct symtab
*symtab
;
1829 struct blockvector
*bv
;
1830 struct block
*block
;
1835 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1839 bv
= BLOCKVECTOR (symtab
);
1840 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1841 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1843 error_in_psymtab_expansion (kind
, name
, symtab
);
1845 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1846 return SYMBOL_TYPE (sym
);
1851 /* The standard implementation of lookup_transparent_type. This code
1852 was modeled on lookup_symbol -- the parts not relevant to looking
1853 up types were just left out. In particular it's assumed here that
1854 types are available in struct_domain and only at file-static or
1858 basic_lookup_transparent_type (const char *name
)
1861 struct symtab
*s
= NULL
;
1862 struct blockvector
*bv
;
1863 struct objfile
*objfile
;
1864 struct block
*block
;
1867 /* Now search all the global symbols. Do the symtab's first, then
1868 check the psymtab's. If a psymtab indicates the existence
1869 of the desired name as a global, then do psymtab-to-symtab
1870 conversion on the fly and return the found symbol. */
1872 ALL_OBJFILES (objfile
)
1874 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1876 bv
= BLOCKVECTOR (s
);
1877 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1878 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1879 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1881 return SYMBOL_TYPE (sym
);
1886 ALL_OBJFILES (objfile
)
1888 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1893 /* Now search the static file-level symbols.
1894 Not strictly correct, but more useful than an error.
1895 Do the symtab's first, then
1896 check the psymtab's. If a psymtab indicates the existence
1897 of the desired name as a file-level static, then do psymtab-to-symtab
1898 conversion on the fly and return the found symbol. */
1900 ALL_OBJFILES (objfile
)
1902 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1904 bv
= BLOCKVECTOR (s
);
1905 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1906 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1907 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1909 return SYMBOL_TYPE (sym
);
1914 ALL_OBJFILES (objfile
)
1916 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1921 return (struct type
*) 0;
1924 /* Find the name of the file containing main(). */
1925 /* FIXME: What about languages without main() or specially linked
1926 executables that have no main() ? */
1929 find_main_filename (void)
1931 struct objfile
*objfile
;
1932 char *name
= main_name ();
1934 ALL_OBJFILES (objfile
)
1940 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1947 /* Search BLOCK for symbol NAME in DOMAIN.
1949 Note that if NAME is the demangled form of a C++ symbol, we will fail
1950 to find a match during the binary search of the non-encoded names, but
1951 for now we don't worry about the slight inefficiency of looking for
1952 a match we'll never find, since it will go pretty quick. Once the
1953 binary search terminates, we drop through and do a straight linear
1954 search on the symbols. Each symbol which is marked as being a ObjC/C++
1955 symbol (language_cplus or language_objc set) has both the encoded and
1956 non-encoded names tested for a match. */
1959 lookup_block_symbol (const struct block
*block
, const char *name
,
1960 const domain_enum domain
)
1962 struct block_iterator iter
;
1965 if (!BLOCK_FUNCTION (block
))
1967 for (sym
= block_iter_name_first (block
, name
, &iter
);
1969 sym
= block_iter_name_next (name
, &iter
))
1971 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1972 SYMBOL_DOMAIN (sym
), domain
))
1979 /* Note that parameter symbols do not always show up last in the
1980 list; this loop makes sure to take anything else other than
1981 parameter symbols first; it only uses parameter symbols as a
1982 last resort. Note that this only takes up extra computation
1985 struct symbol
*sym_found
= NULL
;
1987 for (sym
= block_iter_name_first (block
, name
, &iter
);
1989 sym
= block_iter_name_next (name
, &iter
))
1991 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1992 SYMBOL_DOMAIN (sym
), domain
))
1995 if (!SYMBOL_IS_ARGUMENT (sym
))
2001 return (sym_found
); /* Will be NULL if not found. */
2005 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2007 For each symbol that matches, CALLBACK is called. The symbol and
2008 DATA are passed to the callback.
2010 If CALLBACK returns zero, the iteration ends. Otherwise, the
2011 search continues. */
2014 iterate_over_symbols (const struct block
*block
, const char *name
,
2015 const domain_enum domain
,
2016 symbol_found_callback_ftype
*callback
,
2019 struct block_iterator iter
;
2022 for (sym
= block_iter_name_first (block
, name
, &iter
);
2024 sym
= block_iter_name_next (name
, &iter
))
2026 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2027 SYMBOL_DOMAIN (sym
), domain
))
2029 if (!callback (sym
, data
))
2035 /* Find the symtab associated with PC and SECTION. Look through the
2036 psymtabs and read in another symtab if necessary. */
2039 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2042 struct blockvector
*bv
;
2043 struct symtab
*s
= NULL
;
2044 struct symtab
*best_s
= NULL
;
2045 struct objfile
*objfile
;
2046 CORE_ADDR distance
= 0;
2047 struct minimal_symbol
*msymbol
;
2049 /* If we know that this is not a text address, return failure. This is
2050 necessary because we loop based on the block's high and low code
2051 addresses, which do not include the data ranges, and because
2052 we call find_pc_sect_psymtab which has a similar restriction based
2053 on the partial_symtab's texthigh and textlow. */
2054 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2056 && (MSYMBOL_TYPE (msymbol
) == mst_data
2057 || MSYMBOL_TYPE (msymbol
) == mst_bss
2058 || MSYMBOL_TYPE (msymbol
) == mst_abs
2059 || MSYMBOL_TYPE (msymbol
) == mst_file_data
2060 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
2063 /* Search all symtabs for the one whose file contains our address, and which
2064 is the smallest of all the ones containing the address. This is designed
2065 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2066 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2067 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2069 This happens for native ecoff format, where code from included files
2070 gets its own symtab. The symtab for the included file should have
2071 been read in already via the dependency mechanism.
2072 It might be swifter to create several symtabs with the same name
2073 like xcoff does (I'm not sure).
2075 It also happens for objfiles that have their functions reordered.
2076 For these, the symtab we are looking for is not necessarily read in. */
2078 ALL_PRIMARY_SYMTABS (objfile
, s
)
2080 bv
= BLOCKVECTOR (s
);
2081 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2083 if (BLOCK_START (b
) <= pc
2084 && BLOCK_END (b
) > pc
2086 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2088 /* For an objfile that has its functions reordered,
2089 find_pc_psymtab will find the proper partial symbol table
2090 and we simply return its corresponding symtab. */
2091 /* In order to better support objfiles that contain both
2092 stabs and coff debugging info, we continue on if a psymtab
2094 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2096 struct symtab
*result
;
2099 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2108 struct block_iterator iter
;
2109 struct symbol
*sym
= NULL
;
2111 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2113 fixup_symbol_section (sym
, objfile
);
2114 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
2118 continue; /* No symbol in this symtab matches
2121 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2129 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2131 ALL_OBJFILES (objfile
)
2133 struct symtab
*result
;
2137 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2148 /* Find the symtab associated with PC. Look through the psymtabs and read
2149 in another symtab if necessary. Backward compatibility, no section. */
2152 find_pc_symtab (CORE_ADDR pc
)
2154 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2158 /* Find the source file and line number for a given PC value and SECTION.
2159 Return a structure containing a symtab pointer, a line number,
2160 and a pc range for the entire source line.
2161 The value's .pc field is NOT the specified pc.
2162 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2163 use the line that ends there. Otherwise, in that case, the line
2164 that begins there is used. */
2166 /* The big complication here is that a line may start in one file, and end just
2167 before the start of another file. This usually occurs when you #include
2168 code in the middle of a subroutine. To properly find the end of a line's PC
2169 range, we must search all symtabs associated with this compilation unit, and
2170 find the one whose first PC is closer than that of the next line in this
2173 /* If it's worth the effort, we could be using a binary search. */
2175 struct symtab_and_line
2176 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2179 struct linetable
*l
;
2182 struct linetable_entry
*item
;
2183 struct symtab_and_line val
;
2184 struct blockvector
*bv
;
2185 struct minimal_symbol
*msymbol
;
2186 struct minimal_symbol
*mfunsym
;
2187 struct objfile
*objfile
;
2189 /* Info on best line seen so far, and where it starts, and its file. */
2191 struct linetable_entry
*best
= NULL
;
2192 CORE_ADDR best_end
= 0;
2193 struct symtab
*best_symtab
= 0;
2195 /* Store here the first line number
2196 of a file which contains the line at the smallest pc after PC.
2197 If we don't find a line whose range contains PC,
2198 we will use a line one less than this,
2199 with a range from the start of that file to the first line's pc. */
2200 struct linetable_entry
*alt
= NULL
;
2202 /* Info on best line seen in this file. */
2204 struct linetable_entry
*prev
;
2206 /* If this pc is not from the current frame,
2207 it is the address of the end of a call instruction.
2208 Quite likely that is the start of the following statement.
2209 But what we want is the statement containing the instruction.
2210 Fudge the pc to make sure we get that. */
2212 init_sal (&val
); /* initialize to zeroes */
2214 val
.pspace
= current_program_space
;
2216 /* It's tempting to assume that, if we can't find debugging info for
2217 any function enclosing PC, that we shouldn't search for line
2218 number info, either. However, GAS can emit line number info for
2219 assembly files --- very helpful when debugging hand-written
2220 assembly code. In such a case, we'd have no debug info for the
2221 function, but we would have line info. */
2226 /* elz: added this because this function returned the wrong
2227 information if the pc belongs to a stub (import/export)
2228 to call a shlib function. This stub would be anywhere between
2229 two functions in the target, and the line info was erroneously
2230 taken to be the one of the line before the pc. */
2232 /* RT: Further explanation:
2234 * We have stubs (trampolines) inserted between procedures.
2236 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2237 * exists in the main image.
2239 * In the minimal symbol table, we have a bunch of symbols
2240 * sorted by start address. The stubs are marked as "trampoline",
2241 * the others appear as text. E.g.:
2243 * Minimal symbol table for main image
2244 * main: code for main (text symbol)
2245 * shr1: stub (trampoline symbol)
2246 * foo: code for foo (text symbol)
2248 * Minimal symbol table for "shr1" image:
2250 * shr1: code for shr1 (text symbol)
2253 * So the code below is trying to detect if we are in the stub
2254 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2255 * and if found, do the symbolization from the real-code address
2256 * rather than the stub address.
2258 * Assumptions being made about the minimal symbol table:
2259 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2260 * if we're really in the trampoline.s If we're beyond it (say
2261 * we're in "foo" in the above example), it'll have a closer
2262 * symbol (the "foo" text symbol for example) and will not
2263 * return the trampoline.
2264 * 2. lookup_minimal_symbol_text() will find a real text symbol
2265 * corresponding to the trampoline, and whose address will
2266 * be different than the trampoline address. I put in a sanity
2267 * check for the address being the same, to avoid an
2268 * infinite recursion.
2270 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2271 if (msymbol
!= NULL
)
2272 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2274 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2276 if (mfunsym
== NULL
)
2277 /* I eliminated this warning since it is coming out
2278 * in the following situation:
2279 * gdb shmain // test program with shared libraries
2280 * (gdb) break shr1 // function in shared lib
2281 * Warning: In stub for ...
2282 * In the above situation, the shared lib is not loaded yet,
2283 * so of course we can't find the real func/line info,
2284 * but the "break" still works, and the warning is annoying.
2285 * So I commented out the warning. RT */
2286 /* warning ("In stub for %s; unable to find real function/line info",
2287 SYMBOL_LINKAGE_NAME (msymbol)); */
2290 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
2291 == SYMBOL_VALUE_ADDRESS (msymbol
))
2292 /* Avoid infinite recursion */
2293 /* See above comment about why warning is commented out. */
2294 /* warning ("In stub for %s; unable to find real function/line info",
2295 SYMBOL_LINKAGE_NAME (msymbol)); */
2299 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2303 s
= find_pc_sect_symtab (pc
, section
);
2306 /* If no symbol information, return previous pc. */
2313 bv
= BLOCKVECTOR (s
);
2314 objfile
= s
->objfile
;
2316 /* Look at all the symtabs that share this blockvector.
2317 They all have the same apriori range, that we found was right;
2318 but they have different line tables. */
2320 ALL_OBJFILE_SYMTABS (objfile
, s
)
2322 if (BLOCKVECTOR (s
) != bv
)
2325 /* Find the best line in this symtab. */
2332 /* I think len can be zero if the symtab lacks line numbers
2333 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2334 I'm not sure which, and maybe it depends on the symbol
2340 item
= l
->item
; /* Get first line info. */
2342 /* Is this file's first line closer than the first lines of other files?
2343 If so, record this file, and its first line, as best alternate. */
2344 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2347 for (i
= 0; i
< len
; i
++, item
++)
2349 /* Leave prev pointing to the linetable entry for the last line
2350 that started at or before PC. */
2357 /* At this point, prev points at the line whose start addr is <= pc, and
2358 item points at the next line. If we ran off the end of the linetable
2359 (pc >= start of the last line), then prev == item. If pc < start of
2360 the first line, prev will not be set. */
2362 /* Is this file's best line closer than the best in the other files?
2363 If so, record this file, and its best line, as best so far. Don't
2364 save prev if it represents the end of a function (i.e. line number
2365 0) instead of a real line. */
2367 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2372 /* Discard BEST_END if it's before the PC of the current BEST. */
2373 if (best_end
<= best
->pc
)
2377 /* If another line (denoted by ITEM) is in the linetable and its
2378 PC is after BEST's PC, but before the current BEST_END, then
2379 use ITEM's PC as the new best_end. */
2380 if (best
&& i
< len
&& item
->pc
> best
->pc
2381 && (best_end
== 0 || best_end
> item
->pc
))
2382 best_end
= item
->pc
;
2387 /* If we didn't find any line number info, just return zeros.
2388 We used to return alt->line - 1 here, but that could be
2389 anywhere; if we don't have line number info for this PC,
2390 don't make some up. */
2393 else if (best
->line
== 0)
2395 /* If our best fit is in a range of PC's for which no line
2396 number info is available (line number is zero) then we didn't
2397 find any valid line information. */
2402 val
.symtab
= best_symtab
;
2403 val
.line
= best
->line
;
2405 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2410 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2412 val
.section
= section
;
2416 /* Backward compatibility (no section). */
2418 struct symtab_and_line
2419 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2421 struct obj_section
*section
;
2423 section
= find_pc_overlay (pc
);
2424 if (pc_in_unmapped_range (pc
, section
))
2425 pc
= overlay_mapped_address (pc
, section
);
2426 return find_pc_sect_line (pc
, section
, notcurrent
);
2429 /* Find line number LINE in any symtab whose name is the same as
2432 If found, return the symtab that contains the linetable in which it was
2433 found, set *INDEX to the index in the linetable of the best entry
2434 found, and set *EXACT_MATCH nonzero if the value returned is an
2437 If not found, return NULL. */
2440 find_line_symtab (struct symtab
*symtab
, int line
,
2441 int *index
, int *exact_match
)
2443 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2445 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2449 struct linetable
*best_linetable
;
2450 struct symtab
*best_symtab
;
2452 /* First try looking it up in the given symtab. */
2453 best_linetable
= LINETABLE (symtab
);
2454 best_symtab
= symtab
;
2455 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
2456 if (best_index
< 0 || !exact
)
2458 /* Didn't find an exact match. So we better keep looking for
2459 another symtab with the same name. In the case of xcoff,
2460 multiple csects for one source file (produced by IBM's FORTRAN
2461 compiler) produce multiple symtabs (this is unavoidable
2462 assuming csects can be at arbitrary places in memory and that
2463 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2465 /* BEST is the smallest linenumber > LINE so far seen,
2466 or 0 if none has been seen so far.
2467 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2470 struct objfile
*objfile
;
2473 if (best_index
>= 0)
2474 best
= best_linetable
->item
[best_index
].line
;
2478 ALL_OBJFILES (objfile
)
2481 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
2482 symtab_to_fullname (symtab
));
2485 ALL_SYMTABS (objfile
, s
)
2487 struct linetable
*l
;
2490 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2492 if (FILENAME_CMP (symtab_to_fullname (symtab
),
2493 symtab_to_fullname (s
)) != 0)
2496 ind
= find_line_common (l
, line
, &exact
, 0);
2506 if (best
== 0 || l
->item
[ind
].line
< best
)
2508 best
= l
->item
[ind
].line
;
2521 *index
= best_index
;
2523 *exact_match
= exact
;
2528 /* Given SYMTAB, returns all the PCs function in the symtab that
2529 exactly match LINE. Returns NULL if there are no exact matches,
2530 but updates BEST_ITEM in this case. */
2533 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
2534 struct linetable_entry
**best_item
)
2537 VEC (CORE_ADDR
) *result
= NULL
;
2539 /* First, collect all the PCs that are at this line. */
2545 idx
= find_line_common (LINETABLE (symtab
), line
, &was_exact
, start
);
2551 struct linetable_entry
*item
= &LINETABLE (symtab
)->item
[idx
];
2553 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
2559 VEC_safe_push (CORE_ADDR
, result
, LINETABLE (symtab
)->item
[idx
].pc
);
2567 /* Set the PC value for a given source file and line number and return true.
2568 Returns zero for invalid line number (and sets the PC to 0).
2569 The source file is specified with a struct symtab. */
2572 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2574 struct linetable
*l
;
2581 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2584 l
= LINETABLE (symtab
);
2585 *pc
= l
->item
[ind
].pc
;
2592 /* Find the range of pc values in a line.
2593 Store the starting pc of the line into *STARTPTR
2594 and the ending pc (start of next line) into *ENDPTR.
2595 Returns 1 to indicate success.
2596 Returns 0 if could not find the specified line. */
2599 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2602 CORE_ADDR startaddr
;
2603 struct symtab_and_line found_sal
;
2606 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2609 /* This whole function is based on address. For example, if line 10 has
2610 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2611 "info line *0x123" should say the line goes from 0x100 to 0x200
2612 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2613 This also insures that we never give a range like "starts at 0x134
2614 and ends at 0x12c". */
2616 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2617 if (found_sal
.line
!= sal
.line
)
2619 /* The specified line (sal) has zero bytes. */
2620 *startptr
= found_sal
.pc
;
2621 *endptr
= found_sal
.pc
;
2625 *startptr
= found_sal
.pc
;
2626 *endptr
= found_sal
.end
;
2631 /* Given a line table and a line number, return the index into the line
2632 table for the pc of the nearest line whose number is >= the specified one.
2633 Return -1 if none is found. The value is >= 0 if it is an index.
2634 START is the index at which to start searching the line table.
2636 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2639 find_line_common (struct linetable
*l
, int lineno
,
2640 int *exact_match
, int start
)
2645 /* BEST is the smallest linenumber > LINENO so far seen,
2646 or 0 if none has been seen so far.
2647 BEST_INDEX identifies the item for it. */
2649 int best_index
= -1;
2660 for (i
= start
; i
< len
; i
++)
2662 struct linetable_entry
*item
= &(l
->item
[i
]);
2664 if (item
->line
== lineno
)
2666 /* Return the first (lowest address) entry which matches. */
2671 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2678 /* If we got here, we didn't get an exact match. */
2683 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2685 struct symtab_and_line sal
;
2687 sal
= find_pc_line (pc
, 0);
2690 return sal
.symtab
!= 0;
2693 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2694 address for that function that has an entry in SYMTAB's line info
2695 table. If such an entry cannot be found, return FUNC_ADDR
2699 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2701 CORE_ADDR func_start
, func_end
;
2702 struct linetable
*l
;
2705 /* Give up if this symbol has no lineinfo table. */
2706 l
= LINETABLE (symtab
);
2710 /* Get the range for the function's PC values, or give up if we
2711 cannot, for some reason. */
2712 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2715 /* Linetable entries are ordered by PC values, see the commentary in
2716 symtab.h where `struct linetable' is defined. Thus, the first
2717 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2718 address we are looking for. */
2719 for (i
= 0; i
< l
->nitems
; i
++)
2721 struct linetable_entry
*item
= &(l
->item
[i
]);
2723 /* Don't use line numbers of zero, they mark special entries in
2724 the table. See the commentary on symtab.h before the
2725 definition of struct linetable. */
2726 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2733 /* Given a function symbol SYM, find the symtab and line for the start
2735 If the argument FUNFIRSTLINE is nonzero, we want the first line
2736 of real code inside the function. */
2738 struct symtab_and_line
2739 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2741 struct symtab_and_line sal
;
2743 fixup_symbol_section (sym
, NULL
);
2744 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2745 SYMBOL_OBJ_SECTION (sym
), 0);
2747 /* We always should have a line for the function start address.
2748 If we don't, something is odd. Create a plain SAL refering
2749 just the PC and hope that skip_prologue_sal (if requested)
2750 can find a line number for after the prologue. */
2751 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2754 sal
.pspace
= current_program_space
;
2755 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2756 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2760 skip_prologue_sal (&sal
);
2765 /* Adjust SAL to the first instruction past the function prologue.
2766 If the PC was explicitly specified, the SAL is not changed.
2767 If the line number was explicitly specified, at most the SAL's PC
2768 is updated. If SAL is already past the prologue, then do nothing. */
2771 skip_prologue_sal (struct symtab_and_line
*sal
)
2774 struct symtab_and_line start_sal
;
2775 struct cleanup
*old_chain
;
2776 CORE_ADDR pc
, saved_pc
;
2777 struct obj_section
*section
;
2779 struct objfile
*objfile
;
2780 struct gdbarch
*gdbarch
;
2781 struct block
*b
, *function_block
;
2782 int force_skip
, skip
;
2784 /* Do not change the SAL if PC was specified explicitly. */
2785 if (sal
->explicit_pc
)
2788 old_chain
= save_current_space_and_thread ();
2789 switch_to_program_space_and_thread (sal
->pspace
);
2791 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2794 fixup_symbol_section (sym
, NULL
);
2796 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2797 section
= SYMBOL_OBJ_SECTION (sym
);
2798 name
= SYMBOL_LINKAGE_NAME (sym
);
2799 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2803 struct minimal_symbol
*msymbol
2804 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2806 if (msymbol
== NULL
)
2808 do_cleanups (old_chain
);
2812 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2813 section
= SYMBOL_OBJ_SECTION (msymbol
);
2814 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2815 objfile
= msymbol_objfile (msymbol
);
2818 gdbarch
= get_objfile_arch (objfile
);
2820 /* Process the prologue in two passes. In the first pass try to skip the
2821 prologue (SKIP is true) and verify there is a real need for it (indicated
2822 by FORCE_SKIP). If no such reason was found run a second pass where the
2823 prologue is not skipped (SKIP is false). */
2828 /* Be conservative - allow direct PC (without skipping prologue) only if we
2829 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2830 have to be set by the caller so we use SYM instead. */
2831 if (sym
&& SYMBOL_SYMTAB (sym
)->locations_valid
)
2839 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2840 so that gdbarch_skip_prologue has something unique to work on. */
2841 if (section_is_overlay (section
) && !section_is_mapped (section
))
2842 pc
= overlay_unmapped_address (pc
, section
);
2844 /* Skip "first line" of function (which is actually its prologue). */
2845 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2847 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2849 /* For overlays, map pc back into its mapped VMA range. */
2850 pc
= overlay_mapped_address (pc
, section
);
2852 /* Calculate line number. */
2853 start_sal
= find_pc_sect_line (pc
, section
, 0);
2855 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2856 line is still part of the same function. */
2857 if (skip
&& start_sal
.pc
!= pc
2858 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2859 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2860 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2861 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2863 /* First pc of next line */
2865 /* Recalculate the line number (might not be N+1). */
2866 start_sal
= find_pc_sect_line (pc
, section
, 0);
2869 /* On targets with executable formats that don't have a concept of
2870 constructors (ELF with .init has, PE doesn't), gcc emits a call
2871 to `__main' in `main' between the prologue and before user
2873 if (gdbarch_skip_main_prologue_p (gdbarch
)
2874 && name
&& strcmp_iw (name
, "main") == 0)
2876 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2877 /* Recalculate the line number (might not be N+1). */
2878 start_sal
= find_pc_sect_line (pc
, section
, 0);
2882 while (!force_skip
&& skip
--);
2884 /* If we still don't have a valid source line, try to find the first
2885 PC in the lineinfo table that belongs to the same function. This
2886 happens with COFF debug info, which does not seem to have an
2887 entry in lineinfo table for the code after the prologue which has
2888 no direct relation to source. For example, this was found to be
2889 the case with the DJGPP target using "gcc -gcoff" when the
2890 compiler inserted code after the prologue to make sure the stack
2892 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
2894 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2895 /* Recalculate the line number. */
2896 start_sal
= find_pc_sect_line (pc
, section
, 0);
2899 do_cleanups (old_chain
);
2901 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2902 forward SAL to the end of the prologue. */
2907 sal
->section
= section
;
2909 /* Unless the explicit_line flag was set, update the SAL line
2910 and symtab to correspond to the modified PC location. */
2911 if (sal
->explicit_line
)
2914 sal
->symtab
= start_sal
.symtab
;
2915 sal
->line
= start_sal
.line
;
2916 sal
->end
= start_sal
.end
;
2918 /* Check if we are now inside an inlined function. If we can,
2919 use the call site of the function instead. */
2920 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2921 function_block
= NULL
;
2924 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2926 else if (BLOCK_FUNCTION (b
) != NULL
)
2928 b
= BLOCK_SUPERBLOCK (b
);
2930 if (function_block
!= NULL
2931 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2933 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2934 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2938 /* If P is of the form "operator[ \t]+..." where `...' is
2939 some legitimate operator text, return a pointer to the
2940 beginning of the substring of the operator text.
2941 Otherwise, return "". */
2944 operator_chars (char *p
, char **end
)
2947 if (strncmp (p
, "operator", 8))
2951 /* Don't get faked out by `operator' being part of a longer
2953 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2956 /* Allow some whitespace between `operator' and the operator symbol. */
2957 while (*p
== ' ' || *p
== '\t')
2960 /* Recognize 'operator TYPENAME'. */
2962 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2966 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2975 case '\\': /* regexp quoting */
2978 if (p
[2] == '=') /* 'operator\*=' */
2980 else /* 'operator\*' */
2984 else if (p
[1] == '[')
2987 error (_("mismatched quoting on brackets, "
2988 "try 'operator\\[\\]'"));
2989 else if (p
[2] == '\\' && p
[3] == ']')
2991 *end
= p
+ 4; /* 'operator\[\]' */
2995 error (_("nothing is allowed between '[' and ']'"));
2999 /* Gratuitous qoute: skip it and move on. */
3021 if (p
[0] == '-' && p
[1] == '>')
3023 /* Struct pointer member operator 'operator->'. */
3026 *end
= p
+ 3; /* 'operator->*' */
3029 else if (p
[2] == '\\')
3031 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3036 *end
= p
+ 2; /* 'operator->' */
3040 if (p
[1] == '=' || p
[1] == p
[0])
3051 error (_("`operator ()' must be specified "
3052 "without whitespace in `()'"));
3057 error (_("`operator ?:' must be specified "
3058 "without whitespace in `?:'"));
3063 error (_("`operator []' must be specified "
3064 "without whitespace in `[]'"));
3068 error (_("`operator %s' not supported"), p
);
3077 /* Cache to watch for file names already seen by filename_seen. */
3079 struct filename_seen_cache
3081 /* Table of files seen so far. */
3083 /* Initial size of the table. It automagically grows from here. */
3084 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3087 /* filename_seen_cache constructor. */
3089 static struct filename_seen_cache
*
3090 create_filename_seen_cache (void)
3092 struct filename_seen_cache
*cache
;
3094 cache
= XNEW (struct filename_seen_cache
);
3095 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3096 filename_hash
, filename_eq
,
3097 NULL
, xcalloc
, xfree
);
3102 /* Empty the cache, but do not delete it. */
3105 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
3107 htab_empty (cache
->tab
);
3110 /* filename_seen_cache destructor.
3111 This takes a void * argument as it is generally used as a cleanup. */
3114 delete_filename_seen_cache (void *ptr
)
3116 struct filename_seen_cache
*cache
= ptr
;
3118 htab_delete (cache
->tab
);
3122 /* If FILE is not already in the table of files in CACHE, return zero;
3123 otherwise return non-zero. Optionally add FILE to the table if ADD
3126 NOTE: We don't manage space for FILE, we assume FILE lives as long
3127 as the caller needs. */
3130 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
3134 /* Is FILE in tab? */
3135 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
3139 /* No; maybe add it to tab. */
3141 *slot
= (char *) file
;
3146 /* Data structure to maintain printing state for output_source_filename. */
3148 struct output_source_filename_data
3150 /* Cache of what we've seen so far. */
3151 struct filename_seen_cache
*filename_seen_cache
;
3153 /* Flag of whether we're printing the first one. */
3157 /* Slave routine for sources_info. Force line breaks at ,'s.
3158 NAME is the name to print.
3159 DATA contains the state for printing and watching for duplicates. */
3162 output_source_filename (const char *name
,
3163 struct output_source_filename_data
*data
)
3165 /* Since a single source file can result in several partial symbol
3166 tables, we need to avoid printing it more than once. Note: if
3167 some of the psymtabs are read in and some are not, it gets
3168 printed both under "Source files for which symbols have been
3169 read" and "Source files for which symbols will be read in on
3170 demand". I consider this a reasonable way to deal with the
3171 situation. I'm not sure whether this can also happen for
3172 symtabs; it doesn't hurt to check. */
3174 /* Was NAME already seen? */
3175 if (filename_seen (data
->filename_seen_cache
, name
, 1))
3177 /* Yes; don't print it again. */
3181 /* No; print it and reset *FIRST. */
3183 printf_filtered (", ");
3187 fputs_filtered (name
, gdb_stdout
);
3190 /* A callback for map_partial_symbol_filenames. */
3193 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3196 output_source_filename (fullname
? fullname
: filename
, data
);
3200 sources_info (char *ignore
, int from_tty
)
3203 struct objfile
*objfile
;
3204 struct output_source_filename_data data
;
3205 struct cleanup
*cleanups
;
3207 if (!have_full_symbols () && !have_partial_symbols ())
3209 error (_("No symbol table is loaded. Use the \"file\" command."));
3212 data
.filename_seen_cache
= create_filename_seen_cache ();
3213 cleanups
= make_cleanup (delete_filename_seen_cache
,
3214 data
.filename_seen_cache
);
3216 printf_filtered ("Source files for which symbols have been read in:\n\n");
3219 ALL_SYMTABS (objfile
, s
)
3221 const char *fullname
= symtab_to_fullname (s
);
3223 output_source_filename (fullname
, &data
);
3225 printf_filtered ("\n\n");
3227 printf_filtered ("Source files for which symbols "
3228 "will be read in on demand:\n\n");
3230 clear_filename_seen_cache (data
.filename_seen_cache
);
3232 map_partial_symbol_filenames (output_partial_symbol_filename
, &data
,
3233 1 /*need_fullname*/);
3234 printf_filtered ("\n");
3236 do_cleanups (cleanups
);
3239 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
3240 non-zero compare only lbasename of FILES. */
3243 file_matches (const char *file
, char *files
[], int nfiles
, int basenames
)
3247 if (file
!= NULL
&& nfiles
!= 0)
3249 for (i
= 0; i
< nfiles
; i
++)
3251 if (compare_filenames_for_search (file
, (basenames
3252 ? lbasename (files
[i
])
3257 else if (nfiles
== 0)
3262 /* Free any memory associated with a search. */
3265 free_search_symbols (struct symbol_search
*symbols
)
3267 struct symbol_search
*p
;
3268 struct symbol_search
*next
;
3270 for (p
= symbols
; p
!= NULL
; p
= next
)
3278 do_free_search_symbols_cleanup (void *symbols
)
3280 free_search_symbols (symbols
);
3284 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
3286 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
3289 /* Helper function for sort_search_symbols and qsort. Can only
3290 sort symbols, not minimal symbols. */
3293 compare_search_syms (const void *sa
, const void *sb
)
3295 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
3296 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
3298 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
3299 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3302 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3303 prevtail where it is, but update its next pointer to point to
3304 the first of the sorted symbols. */
3306 static struct symbol_search
*
3307 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3309 struct symbol_search
**symbols
, *symp
, *old_next
;
3312 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3314 symp
= prevtail
->next
;
3315 for (i
= 0; i
< nfound
; i
++)
3320 /* Generally NULL. */
3323 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3324 compare_search_syms
);
3327 for (i
= 0; i
< nfound
; i
++)
3329 symp
->next
= symbols
[i
];
3332 symp
->next
= old_next
;
3338 /* An object of this type is passed as the user_data to the
3339 expand_symtabs_matching method. */
3340 struct search_symbols_data
3345 /* It is true if PREG contains valid data, false otherwise. */
3346 unsigned preg_p
: 1;
3350 /* A callback for expand_symtabs_matching. */
3353 search_symbols_file_matches (const char *filename
, void *user_data
,
3356 struct search_symbols_data
*data
= user_data
;
3358 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
3361 /* A callback for expand_symtabs_matching. */
3364 search_symbols_name_matches (const char *symname
, void *user_data
)
3366 struct search_symbols_data
*data
= user_data
;
3368 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3371 /* Search the symbol table for matches to the regular expression REGEXP,
3372 returning the results in *MATCHES.
3374 Only symbols of KIND are searched:
3375 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3376 and constants (enums)
3377 FUNCTIONS_DOMAIN - search all functions
3378 TYPES_DOMAIN - search all type names
3379 ALL_DOMAIN - an internal error for this function
3381 free_search_symbols should be called when *MATCHES is no longer needed.
3383 The results are sorted locally; each symtab's global and static blocks are
3384 separately alphabetized. */
3387 search_symbols (char *regexp
, enum search_domain kind
,
3388 int nfiles
, char *files
[],
3389 struct symbol_search
**matches
)
3392 struct blockvector
*bv
;
3395 struct block_iterator iter
;
3397 struct objfile
*objfile
;
3398 struct minimal_symbol
*msymbol
;
3400 static const enum minimal_symbol_type types
[]
3401 = {mst_data
, mst_text
, mst_abs
};
3402 static const enum minimal_symbol_type types2
[]
3403 = {mst_bss
, mst_file_text
, mst_abs
};
3404 static const enum minimal_symbol_type types3
[]
3405 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3406 static const enum minimal_symbol_type types4
[]
3407 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3408 enum minimal_symbol_type ourtype
;
3409 enum minimal_symbol_type ourtype2
;
3410 enum minimal_symbol_type ourtype3
;
3411 enum minimal_symbol_type ourtype4
;
3412 struct symbol_search
*sr
;
3413 struct symbol_search
*psr
;
3414 struct symbol_search
*tail
;
3415 struct search_symbols_data datum
;
3417 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3418 CLEANUP_CHAIN is freed only in the case of an error. */
3419 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3420 struct cleanup
*retval_chain
;
3422 gdb_assert (kind
<= TYPES_DOMAIN
);
3424 ourtype
= types
[kind
];
3425 ourtype2
= types2
[kind
];
3426 ourtype3
= types3
[kind
];
3427 ourtype4
= types4
[kind
];
3429 sr
= *matches
= NULL
;
3435 /* Make sure spacing is right for C++ operators.
3436 This is just a courtesy to make the matching less sensitive
3437 to how many spaces the user leaves between 'operator'
3438 and <TYPENAME> or <OPERATOR>. */
3440 char *opname
= operator_chars (regexp
, &opend
);
3445 int fix
= -1; /* -1 means ok; otherwise number of
3448 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3450 /* There should 1 space between 'operator' and 'TYPENAME'. */
3451 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3456 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3457 if (opname
[-1] == ' ')
3460 /* If wrong number of spaces, fix it. */
3463 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3465 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3470 errcode
= regcomp (&datum
.preg
, regexp
,
3471 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3475 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3477 make_cleanup (xfree
, err
);
3478 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3481 make_regfree_cleanup (&datum
.preg
);
3484 /* Search through the partial symtabs *first* for all symbols
3485 matching the regexp. That way we don't have to reproduce all of
3486 the machinery below. */
3488 datum
.nfiles
= nfiles
;
3489 datum
.files
= files
;
3490 ALL_OBJFILES (objfile
)
3493 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3496 : search_symbols_file_matches
),
3497 search_symbols_name_matches
,
3502 retval_chain
= old_chain
;
3504 /* Here, we search through the minimal symbol tables for functions
3505 and variables that match, and force their symbols to be read.
3506 This is in particular necessary for demangled variable names,
3507 which are no longer put into the partial symbol tables.
3508 The symbol will then be found during the scan of symtabs below.
3510 For functions, find_pc_symtab should succeed if we have debug info
3511 for the function, for variables we have to call
3512 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3514 If the lookup fails, set found_misc so that we will rescan to print
3515 any matching symbols without debug info.
3516 We only search the objfile the msymbol came from, we no longer search
3517 all objfiles. In large programs (1000s of shared libs) searching all
3518 objfiles is not worth the pain. */
3520 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3522 ALL_MSYMBOLS (objfile
, msymbol
)
3526 if (msymbol
->created_by_gdb
)
3529 if (MSYMBOL_TYPE (msymbol
) == ourtype
3530 || MSYMBOL_TYPE (msymbol
) == ourtype2
3531 || MSYMBOL_TYPE (msymbol
) == ourtype3
3532 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3535 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3538 /* Note: An important side-effect of these lookup functions
3539 is to expand the symbol table if msymbol is found, for the
3540 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3541 if (kind
== FUNCTIONS_DOMAIN
3542 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
3543 : (lookup_symbol_in_objfile_from_linkage_name
3544 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3552 ALL_PRIMARY_SYMTABS (objfile
, s
)
3554 bv
= BLOCKVECTOR (s
);
3555 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3557 struct symbol_search
*prevtail
= tail
;
3560 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3561 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3563 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3567 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
3568 a substring of symtab_to_fullname as it may contain "./" etc. */
3569 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
3570 || ((basenames_may_differ
3571 || file_matches (lbasename (real_symtab
->filename
),
3573 && file_matches (symtab_to_fullname (real_symtab
),
3576 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3578 && ((kind
== VARIABLES_DOMAIN
3579 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3580 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3581 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3582 /* LOC_CONST can be used for more than just enums,
3583 e.g., c++ static const members.
3584 We only want to skip enums here. */
3585 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3586 && TYPE_CODE (SYMBOL_TYPE (sym
))
3588 || (kind
== FUNCTIONS_DOMAIN
3589 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3590 || (kind
== TYPES_DOMAIN
3591 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3594 psr
= (struct symbol_search
*)
3595 xmalloc (sizeof (struct symbol_search
));
3597 psr
->symtab
= real_symtab
;
3599 psr
->msymbol
= NULL
;
3611 if (prevtail
== NULL
)
3613 struct symbol_search dummy
;
3616 tail
= sort_search_symbols (&dummy
, nfound
);
3619 make_cleanup_free_search_symbols (sr
);
3622 tail
= sort_search_symbols (prevtail
, nfound
);
3627 /* If there are no eyes, avoid all contact. I mean, if there are
3628 no debug symbols, then print directly from the msymbol_vector. */
3630 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
3632 ALL_MSYMBOLS (objfile
, msymbol
)
3636 if (msymbol
->created_by_gdb
)
3639 if (MSYMBOL_TYPE (msymbol
) == ourtype
3640 || MSYMBOL_TYPE (msymbol
) == ourtype2
3641 || MSYMBOL_TYPE (msymbol
) == ourtype3
3642 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3645 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3648 /* For functions we can do a quick check of whether the
3649 symbol might be found via find_pc_symtab. */
3650 if (kind
!= FUNCTIONS_DOMAIN
3651 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
)
3653 if (lookup_symbol_in_objfile_from_linkage_name
3654 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3658 psr
= (struct symbol_search
*)
3659 xmalloc (sizeof (struct symbol_search
));
3661 psr
->msymbol
= msymbol
;
3668 make_cleanup_free_search_symbols (sr
);
3680 discard_cleanups (retval_chain
);
3681 do_cleanups (old_chain
);
3685 /* Helper function for symtab_symbol_info, this function uses
3686 the data returned from search_symbols() to print information
3687 regarding the match to gdb_stdout. */
3690 print_symbol_info (enum search_domain kind
,
3691 struct symtab
*s
, struct symbol
*sym
,
3692 int block
, const char *last
)
3694 const char *s_filename
= symtab_to_filename_for_display (s
);
3696 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
3698 fputs_filtered ("\nFile ", gdb_stdout
);
3699 fputs_filtered (s_filename
, gdb_stdout
);
3700 fputs_filtered (":\n", gdb_stdout
);
3703 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3704 printf_filtered ("static ");
3706 /* Typedef that is not a C++ class. */
3707 if (kind
== TYPES_DOMAIN
3708 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3709 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3710 /* variable, func, or typedef-that-is-c++-class. */
3711 else if (kind
< TYPES_DOMAIN
3712 || (kind
== TYPES_DOMAIN
3713 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3715 type_print (SYMBOL_TYPE (sym
),
3716 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3717 ? "" : SYMBOL_PRINT_NAME (sym
)),
3720 printf_filtered (";\n");
3724 /* This help function for symtab_symbol_info() prints information
3725 for non-debugging symbols to gdb_stdout. */
3728 print_msymbol_info (struct minimal_symbol
*msymbol
)
3730 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3733 if (gdbarch_addr_bit (gdbarch
) <= 32)
3734 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3735 & (CORE_ADDR
) 0xffffffff,
3738 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3740 printf_filtered ("%s %s\n",
3741 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3744 /* This is the guts of the commands "info functions", "info types", and
3745 "info variables". It calls search_symbols to find all matches and then
3746 print_[m]symbol_info to print out some useful information about the
3750 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3752 static const char * const classnames
[] =
3753 {"variable", "function", "type"};
3754 struct symbol_search
*symbols
;
3755 struct symbol_search
*p
;
3756 struct cleanup
*old_chain
;
3757 const char *last_filename
= NULL
;
3760 gdb_assert (kind
<= TYPES_DOMAIN
);
3762 /* Must make sure that if we're interrupted, symbols gets freed. */
3763 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3764 old_chain
= make_cleanup_free_search_symbols (symbols
);
3767 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
3768 classnames
[kind
], regexp
);
3770 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
3772 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3776 if (p
->msymbol
!= NULL
)
3780 printf_filtered (_("\nNon-debugging symbols:\n"));
3783 print_msymbol_info (p
->msymbol
);
3787 print_symbol_info (kind
,
3792 last_filename
= symtab_to_filename_for_display (p
->symtab
);
3796 do_cleanups (old_chain
);
3800 variables_info (char *regexp
, int from_tty
)
3802 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3806 functions_info (char *regexp
, int from_tty
)
3808 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3813 types_info (char *regexp
, int from_tty
)
3815 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3818 /* Breakpoint all functions matching regular expression. */
3821 rbreak_command_wrapper (char *regexp
, int from_tty
)
3823 rbreak_command (regexp
, from_tty
);
3826 /* A cleanup function that calls end_rbreak_breakpoints. */
3829 do_end_rbreak_breakpoints (void *ignore
)
3831 end_rbreak_breakpoints ();
3835 rbreak_command (char *regexp
, int from_tty
)
3837 struct symbol_search
*ss
;
3838 struct symbol_search
*p
;
3839 struct cleanup
*old_chain
;
3840 char *string
= NULL
;
3842 char **files
= NULL
, *file_name
;
3847 char *colon
= strchr (regexp
, ':');
3849 if (colon
&& *(colon
+ 1) != ':')
3853 colon_index
= colon
- regexp
;
3854 file_name
= alloca (colon_index
+ 1);
3855 memcpy (file_name
, regexp
, colon_index
);
3856 file_name
[colon_index
--] = 0;
3857 while (isspace (file_name
[colon_index
]))
3858 file_name
[colon_index
--] = 0;
3861 regexp
= skip_spaces (colon
+ 1);
3865 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3866 old_chain
= make_cleanup_free_search_symbols (ss
);
3867 make_cleanup (free_current_contents
, &string
);
3869 start_rbreak_breakpoints ();
3870 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3871 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3873 if (p
->msymbol
== NULL
)
3875 const char *fullname
= symtab_to_fullname (p
->symtab
);
3877 int newlen
= (strlen (fullname
)
3878 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3883 string
= xrealloc (string
, newlen
);
3886 strcpy (string
, fullname
);
3887 strcat (string
, ":'");
3888 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3889 strcat (string
, "'");
3890 break_command (string
, from_tty
);
3891 print_symbol_info (FUNCTIONS_DOMAIN
,
3895 symtab_to_filename_for_display (p
->symtab
));
3899 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3903 string
= xrealloc (string
, newlen
);
3906 strcpy (string
, "'");
3907 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3908 strcat (string
, "'");
3910 break_command (string
, from_tty
);
3911 printf_filtered ("<function, no debug info> %s;\n",
3912 SYMBOL_PRINT_NAME (p
->msymbol
));
3916 do_cleanups (old_chain
);
3920 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3922 Either sym_text[sym_text_len] != '(' and then we search for any
3923 symbol starting with SYM_TEXT text.
3925 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3926 be terminated at that point. Partial symbol tables do not have parameters
3930 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
3932 int (*ncmp
) (const char *, const char *, size_t);
3934 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3936 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
3939 if (sym_text
[sym_text_len
] == '(')
3941 /* User searches for `name(someth...'. Require NAME to be terminated.
3942 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3943 present but accept even parameters presence. In this case this
3944 function is in fact strcmp_iw but whitespace skipping is not supported
3945 for tab completion. */
3947 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
3954 /* Free any memory associated with a completion list. */
3957 free_completion_list (VEC (char_ptr
) **list_ptr
)
3962 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
3964 VEC_free (char_ptr
, *list_ptr
);
3967 /* Callback for make_cleanup. */
3970 do_free_completion_list (void *list
)
3972 free_completion_list (list
);
3975 /* Helper routine for make_symbol_completion_list. */
3977 static VEC (char_ptr
) *return_val
;
3979 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3980 completion_list_add_name \
3981 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3983 /* Test to see if the symbol specified by SYMNAME (which is already
3984 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3985 characters. If so, add it to the current completion list. */
3988 completion_list_add_name (const char *symname
,
3989 const char *sym_text
, int sym_text_len
,
3990 const char *text
, const char *word
)
3992 /* Clip symbols that cannot match. */
3993 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
3996 /* We have a match for a completion, so add SYMNAME to the current list
3997 of matches. Note that the name is moved to freshly malloc'd space. */
4002 if (word
== sym_text
)
4004 new = xmalloc (strlen (symname
) + 5);
4005 strcpy (new, symname
);
4007 else if (word
> sym_text
)
4009 /* Return some portion of symname. */
4010 new = xmalloc (strlen (symname
) + 5);
4011 strcpy (new, symname
+ (word
- sym_text
));
4015 /* Return some of SYM_TEXT plus symname. */
4016 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4017 strncpy (new, word
, sym_text
- word
);
4018 new[sym_text
- word
] = '\0';
4019 strcat (new, symname
);
4022 VEC_safe_push (char_ptr
, return_val
, new);
4026 /* ObjC: In case we are completing on a selector, look as the msymbol
4027 again and feed all the selectors into the mill. */
4030 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4031 const char *sym_text
, int sym_text_len
,
4032 const char *text
, const char *word
)
4034 static char *tmp
= NULL
;
4035 static unsigned int tmplen
= 0;
4037 const char *method
, *category
, *selector
;
4040 method
= SYMBOL_NATURAL_NAME (msymbol
);
4042 /* Is it a method? */
4043 if ((method
[0] != '-') && (method
[0] != '+'))
4046 if (sym_text
[0] == '[')
4047 /* Complete on shortened method method. */
4048 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4050 while ((strlen (method
) + 1) >= tmplen
)
4056 tmp
= xrealloc (tmp
, tmplen
);
4058 selector
= strchr (method
, ' ');
4059 if (selector
!= NULL
)
4062 category
= strchr (method
, '(');
4064 if ((category
!= NULL
) && (selector
!= NULL
))
4066 memcpy (tmp
, method
, (category
- method
));
4067 tmp
[category
- method
] = ' ';
4068 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4069 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4070 if (sym_text
[0] == '[')
4071 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4074 if (selector
!= NULL
)
4076 /* Complete on selector only. */
4077 strcpy (tmp
, selector
);
4078 tmp2
= strchr (tmp
, ']');
4082 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4086 /* Break the non-quoted text based on the characters which are in
4087 symbols. FIXME: This should probably be language-specific. */
4090 language_search_unquoted_string (const char *text
, const char *p
)
4092 for (; p
> text
; --p
)
4094 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
4098 if ((current_language
->la_language
== language_objc
))
4100 if (p
[-1] == ':') /* Might be part of a method name. */
4102 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
4103 p
-= 2; /* Beginning of a method name. */
4104 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
4105 { /* Might be part of a method name. */
4108 /* Seeing a ' ' or a '(' is not conclusive evidence
4109 that we are in the middle of a method name. However,
4110 finding "-[" or "+[" should be pretty un-ambiguous.
4111 Unfortunately we have to find it now to decide. */
4114 if (isalnum (t
[-1]) || t
[-1] == '_' ||
4115 t
[-1] == ' ' || t
[-1] == ':' ||
4116 t
[-1] == '(' || t
[-1] == ')')
4121 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
4122 p
= t
- 2; /* Method name detected. */
4123 /* Else we leave with p unchanged. */
4133 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
4134 int sym_text_len
, const char *text
,
4137 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
4139 struct type
*t
= SYMBOL_TYPE (sym
);
4140 enum type_code c
= TYPE_CODE (t
);
4143 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
4144 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
4145 if (TYPE_FIELD_NAME (t
, j
))
4146 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
4147 sym_text
, sym_text_len
, text
, word
);
4151 /* Type of the user_data argument passed to add_macro_name or
4152 expand_partial_symbol_name. The contents are simply whatever is
4153 needed by completion_list_add_name. */
4154 struct add_name_data
4156 const char *sym_text
;
4162 /* A callback used with macro_for_each and macro_for_each_in_scope.
4163 This adds a macro's name to the current completion list. */
4166 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4167 struct macro_source_file
*ignore2
, int ignore3
,
4170 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4172 completion_list_add_name ((char *) name
,
4173 datum
->sym_text
, datum
->sym_text_len
,
4174 datum
->text
, datum
->word
);
4177 /* A callback for expand_partial_symbol_names. */
4180 expand_partial_symbol_name (const char *name
, void *user_data
)
4182 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4184 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4188 default_make_symbol_completion_list_break_on (const char *text
,
4190 const char *break_on
,
4191 enum type_code code
)
4193 /* Problem: All of the symbols have to be copied because readline
4194 frees them. I'm not going to worry about this; hopefully there
4195 won't be that many. */
4199 struct minimal_symbol
*msymbol
;
4200 struct objfile
*objfile
;
4202 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4203 struct block_iterator iter
;
4204 /* The symbol we are completing on. Points in same buffer as text. */
4205 const char *sym_text
;
4206 /* Length of sym_text. */
4208 struct add_name_data datum
;
4209 struct cleanup
*back_to
;
4211 /* Now look for the symbol we are supposed to complete on. */
4215 const char *quote_pos
= NULL
;
4217 /* First see if this is a quoted string. */
4219 for (p
= text
; *p
!= '\0'; ++p
)
4221 if (quote_found
!= '\0')
4223 if (*p
== quote_found
)
4224 /* Found close quote. */
4226 else if (*p
== '\\' && p
[1] == quote_found
)
4227 /* A backslash followed by the quote character
4228 doesn't end the string. */
4231 else if (*p
== '\'' || *p
== '"')
4237 if (quote_found
== '\'')
4238 /* A string within single quotes can be a symbol, so complete on it. */
4239 sym_text
= quote_pos
+ 1;
4240 else if (quote_found
== '"')
4241 /* A double-quoted string is never a symbol, nor does it make sense
4242 to complete it any other way. */
4248 /* It is not a quoted string. Break it based on the characters
4249 which are in symbols. */
4252 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4253 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4262 sym_text_len
= strlen (sym_text
);
4264 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4266 if (current_language
->la_language
== language_cplus
4267 || current_language
->la_language
== language_java
4268 || current_language
->la_language
== language_fortran
)
4270 /* These languages may have parameters entered by user but they are never
4271 present in the partial symbol tables. */
4273 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4276 sym_text_len
= cs
- sym_text
;
4278 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4281 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4283 datum
.sym_text
= sym_text
;
4284 datum
.sym_text_len
= sym_text_len
;
4288 /* Look through the partial symtabs for all symbols which begin
4289 by matching SYM_TEXT. Expand all CUs that you find to the list.
4290 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4291 expand_partial_symbol_names (expand_partial_symbol_name
, &datum
);
4293 /* At this point scan through the misc symbol vectors and add each
4294 symbol you find to the list. Eventually we want to ignore
4295 anything that isn't a text symbol (everything else will be
4296 handled by the psymtab code above). */
4298 if (code
== TYPE_CODE_UNDEF
)
4300 ALL_MSYMBOLS (objfile
, msymbol
)
4303 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
4306 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
4311 /* Search upwards from currently selected frame (so that we can
4312 complete on local vars). Also catch fields of types defined in
4313 this places which match our text string. Only complete on types
4314 visible from current context. */
4316 b
= get_selected_block (0);
4317 surrounding_static_block
= block_static_block (b
);
4318 surrounding_global_block
= block_global_block (b
);
4319 if (surrounding_static_block
!= NULL
)
4320 while (b
!= surrounding_static_block
)
4324 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4326 if (code
== TYPE_CODE_UNDEF
)
4328 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4330 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4333 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4334 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
4335 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4339 /* Stop when we encounter an enclosing function. Do not stop for
4340 non-inlined functions - the locals of the enclosing function
4341 are in scope for a nested function. */
4342 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4344 b
= BLOCK_SUPERBLOCK (b
);
4347 /* Add fields from the file's types; symbols will be added below. */
4349 if (code
== TYPE_CODE_UNDEF
)
4351 if (surrounding_static_block
!= NULL
)
4352 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4353 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4355 if (surrounding_global_block
!= NULL
)
4356 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4357 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4360 /* Go through the symtabs and check the externs and statics for
4361 symbols which match. */
4363 ALL_PRIMARY_SYMTABS (objfile
, s
)
4366 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4367 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4369 if (code
== TYPE_CODE_UNDEF
4370 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4371 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4372 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4376 ALL_PRIMARY_SYMTABS (objfile
, s
)
4379 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4380 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4382 if (code
== TYPE_CODE_UNDEF
4383 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4384 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4385 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4389 /* Skip macros if we are completing a struct tag -- arguable but
4390 usually what is expected. */
4391 if (current_language
->la_macro_expansion
== macro_expansion_c
4392 && code
== TYPE_CODE_UNDEF
)
4394 struct macro_scope
*scope
;
4396 /* Add any macros visible in the default scope. Note that this
4397 may yield the occasional wrong result, because an expression
4398 might be evaluated in a scope other than the default. For
4399 example, if the user types "break file:line if <TAB>", the
4400 resulting expression will be evaluated at "file:line" -- but
4401 at there does not seem to be a way to detect this at
4403 scope
= default_macro_scope ();
4406 macro_for_each_in_scope (scope
->file
, scope
->line
,
4407 add_macro_name
, &datum
);
4411 /* User-defined macros are always visible. */
4412 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4415 discard_cleanups (back_to
);
4416 return (return_val
);
4420 default_make_symbol_completion_list (const char *text
, const char *word
,
4421 enum type_code code
)
4423 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
4426 /* Return a vector of all symbols (regardless of class) which begin by
4427 matching TEXT. If the answer is no symbols, then the return value
4431 make_symbol_completion_list (const char *text
, const char *word
)
4433 return current_language
->la_make_symbol_completion_list (text
, word
,
4437 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4438 symbols whose type code is CODE. */
4441 make_symbol_completion_type (const char *text
, const char *word
,
4442 enum type_code code
)
4444 gdb_assert (code
== TYPE_CODE_UNION
4445 || code
== TYPE_CODE_STRUCT
4446 || code
== TYPE_CODE_CLASS
4447 || code
== TYPE_CODE_ENUM
);
4448 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
4451 /* Like make_symbol_completion_list, but suitable for use as a
4452 completion function. */
4455 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4456 const char *text
, const char *word
)
4458 return make_symbol_completion_list (text
, word
);
4461 /* Like make_symbol_completion_list, but returns a list of symbols
4462 defined in a source file FILE. */
4465 make_file_symbol_completion_list (const char *text
, const char *word
,
4466 const char *srcfile
)
4471 struct block_iterator iter
;
4472 /* The symbol we are completing on. Points in same buffer as text. */
4473 const char *sym_text
;
4474 /* Length of sym_text. */
4477 /* Now look for the symbol we are supposed to complete on.
4478 FIXME: This should be language-specific. */
4482 const char *quote_pos
= NULL
;
4484 /* First see if this is a quoted string. */
4486 for (p
= text
; *p
!= '\0'; ++p
)
4488 if (quote_found
!= '\0')
4490 if (*p
== quote_found
)
4491 /* Found close quote. */
4493 else if (*p
== '\\' && p
[1] == quote_found
)
4494 /* A backslash followed by the quote character
4495 doesn't end the string. */
4498 else if (*p
== '\'' || *p
== '"')
4504 if (quote_found
== '\'')
4505 /* A string within single quotes can be a symbol, so complete on it. */
4506 sym_text
= quote_pos
+ 1;
4507 else if (quote_found
== '"')
4508 /* A double-quoted string is never a symbol, nor does it make sense
4509 to complete it any other way. */
4515 /* Not a quoted string. */
4516 sym_text
= language_search_unquoted_string (text
, p
);
4520 sym_text_len
= strlen (sym_text
);
4524 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4526 s
= lookup_symtab (srcfile
);
4529 /* Maybe they typed the file with leading directories, while the
4530 symbol tables record only its basename. */
4531 const char *tail
= lbasename (srcfile
);
4534 s
= lookup_symtab (tail
);
4537 /* If we have no symtab for that file, return an empty list. */
4539 return (return_val
);
4541 /* Go through this symtab and check the externs and statics for
4542 symbols which match. */
4544 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4545 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4547 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4550 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4551 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4553 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4556 return (return_val
);
4559 /* A helper function for make_source_files_completion_list. It adds
4560 another file name to a list of possible completions, growing the
4561 list as necessary. */
4564 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
4565 VEC (char_ptr
) **list
)
4568 size_t fnlen
= strlen (fname
);
4572 /* Return exactly fname. */
4573 new = xmalloc (fnlen
+ 5);
4574 strcpy (new, fname
);
4576 else if (word
> text
)
4578 /* Return some portion of fname. */
4579 new = xmalloc (fnlen
+ 5);
4580 strcpy (new, fname
+ (word
- text
));
4584 /* Return some of TEXT plus fname. */
4585 new = xmalloc (fnlen
+ (text
- word
) + 5);
4586 strncpy (new, word
, text
- word
);
4587 new[text
- word
] = '\0';
4588 strcat (new, fname
);
4590 VEC_safe_push (char_ptr
, *list
, new);
4594 not_interesting_fname (const char *fname
)
4596 static const char *illegal_aliens
[] = {
4597 "_globals_", /* inserted by coff_symtab_read */
4602 for (i
= 0; illegal_aliens
[i
]; i
++)
4604 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4610 /* An object of this type is passed as the user_data argument to
4611 map_partial_symbol_filenames. */
4612 struct add_partial_filename_data
4614 struct filename_seen_cache
*filename_seen_cache
;
4618 VEC (char_ptr
) **list
;
4621 /* A callback for map_partial_symbol_filenames. */
4624 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4627 struct add_partial_filename_data
*data
= user_data
;
4629 if (not_interesting_fname (filename
))
4631 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
4632 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4634 /* This file matches for a completion; add it to the
4635 current list of matches. */
4636 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
4640 const char *base_name
= lbasename (filename
);
4642 if (base_name
!= filename
4643 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
4644 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4645 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
4649 /* Return a vector of all source files whose names begin with matching
4650 TEXT. The file names are looked up in the symbol tables of this
4651 program. If the answer is no matchess, then the return value is
4655 make_source_files_completion_list (const char *text
, const char *word
)
4658 struct objfile
*objfile
;
4659 size_t text_len
= strlen (text
);
4660 VEC (char_ptr
) *list
= NULL
;
4661 const char *base_name
;
4662 struct add_partial_filename_data datum
;
4663 struct filename_seen_cache
*filename_seen_cache
;
4664 struct cleanup
*back_to
, *cache_cleanup
;
4666 if (!have_full_symbols () && !have_partial_symbols ())
4669 back_to
= make_cleanup (do_free_completion_list
, &list
);
4671 filename_seen_cache
= create_filename_seen_cache ();
4672 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
4673 filename_seen_cache
);
4675 ALL_SYMTABS (objfile
, s
)
4677 if (not_interesting_fname (s
->filename
))
4679 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
4680 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4682 /* This file matches for a completion; add it to the current
4684 add_filename_to_list (s
->filename
, text
, word
, &list
);
4688 /* NOTE: We allow the user to type a base name when the
4689 debug info records leading directories, but not the other
4690 way around. This is what subroutines of breakpoint
4691 command do when they parse file names. */
4692 base_name
= lbasename (s
->filename
);
4693 if (base_name
!= s
->filename
4694 && !filename_seen (filename_seen_cache
, base_name
, 1)
4695 && filename_ncmp (base_name
, text
, text_len
) == 0)
4696 add_filename_to_list (base_name
, text
, word
, &list
);
4700 datum
.filename_seen_cache
= filename_seen_cache
;
4703 datum
.text_len
= text_len
;
4705 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4706 0 /*need_fullname*/);
4708 do_cleanups (cache_cleanup
);
4709 discard_cleanups (back_to
);
4714 /* Determine if PC is in the prologue of a function. The prologue is the area
4715 between the first instruction of a function, and the first executable line.
4716 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4718 If non-zero, func_start is where we think the prologue starts, possibly
4719 by previous examination of symbol table information. */
4722 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4724 struct symtab_and_line sal
;
4725 CORE_ADDR func_addr
, func_end
;
4727 /* We have several sources of information we can consult to figure
4729 - Compilers usually emit line number info that marks the prologue
4730 as its own "source line". So the ending address of that "line"
4731 is the end of the prologue. If available, this is the most
4733 - The minimal symbols and partial symbols, which can usually tell
4734 us the starting and ending addresses of a function.
4735 - If we know the function's start address, we can call the
4736 architecture-defined gdbarch_skip_prologue function to analyze the
4737 instruction stream and guess where the prologue ends.
4738 - Our `func_start' argument; if non-zero, this is the caller's
4739 best guess as to the function's entry point. At the time of
4740 this writing, handle_inferior_event doesn't get this right, so
4741 it should be our last resort. */
4743 /* Consult the partial symbol table, to find which function
4745 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4747 CORE_ADDR prologue_end
;
4749 /* We don't even have minsym information, so fall back to using
4750 func_start, if given. */
4752 return 1; /* We *might* be in a prologue. */
4754 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4756 return func_start
<= pc
&& pc
< prologue_end
;
4759 /* If we have line number information for the function, that's
4760 usually pretty reliable. */
4761 sal
= find_pc_line (func_addr
, 0);
4763 /* Now sal describes the source line at the function's entry point,
4764 which (by convention) is the prologue. The end of that "line",
4765 sal.end, is the end of the prologue.
4767 Note that, for functions whose source code is all on a single
4768 line, the line number information doesn't always end up this way.
4769 So we must verify that our purported end-of-prologue address is
4770 *within* the function, not at its start or end. */
4772 || sal
.end
<= func_addr
4773 || func_end
<= sal
.end
)
4775 /* We don't have any good line number info, so use the minsym
4776 information, together with the architecture-specific prologue
4778 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4780 return func_addr
<= pc
&& pc
< prologue_end
;
4783 /* We have line number info, and it looks good. */
4784 return func_addr
<= pc
&& pc
< sal
.end
;
4787 /* Given PC at the function's start address, attempt to find the
4788 prologue end using SAL information. Return zero if the skip fails.
4790 A non-optimized prologue traditionally has one SAL for the function
4791 and a second for the function body. A single line function has
4792 them both pointing at the same line.
4794 An optimized prologue is similar but the prologue may contain
4795 instructions (SALs) from the instruction body. Need to skip those
4796 while not getting into the function body.
4798 The functions end point and an increasing SAL line are used as
4799 indicators of the prologue's endpoint.
4801 This code is based on the function refine_prologue_limit
4805 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4807 struct symtab_and_line prologue_sal
;
4812 /* Get an initial range for the function. */
4813 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4814 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4816 prologue_sal
= find_pc_line (start_pc
, 0);
4817 if (prologue_sal
.line
!= 0)
4819 /* For languages other than assembly, treat two consecutive line
4820 entries at the same address as a zero-instruction prologue.
4821 The GNU assembler emits separate line notes for each instruction
4822 in a multi-instruction macro, but compilers generally will not
4824 if (prologue_sal
.symtab
->language
!= language_asm
)
4826 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4829 /* Skip any earlier lines, and any end-of-sequence marker
4830 from a previous function. */
4831 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4832 || linetable
->item
[idx
].line
== 0)
4835 if (idx
+1 < linetable
->nitems
4836 && linetable
->item
[idx
+1].line
!= 0
4837 && linetable
->item
[idx
+1].pc
== start_pc
)
4841 /* If there is only one sal that covers the entire function,
4842 then it is probably a single line function, like
4844 if (prologue_sal
.end
>= end_pc
)
4847 while (prologue_sal
.end
< end_pc
)
4849 struct symtab_and_line sal
;
4851 sal
= find_pc_line (prologue_sal
.end
, 0);
4854 /* Assume that a consecutive SAL for the same (or larger)
4855 line mark the prologue -> body transition. */
4856 if (sal
.line
>= prologue_sal
.line
)
4858 /* Likewise if we are in a different symtab altogether
4859 (e.g. within a file included via #include). */
4860 if (sal
.symtab
!= prologue_sal
.symtab
)
4863 /* The line number is smaller. Check that it's from the
4864 same function, not something inlined. If it's inlined,
4865 then there is no point comparing the line numbers. */
4866 bl
= block_for_pc (prologue_sal
.end
);
4869 if (block_inlined_p (bl
))
4871 if (BLOCK_FUNCTION (bl
))
4876 bl
= BLOCK_SUPERBLOCK (bl
);
4881 /* The case in which compiler's optimizer/scheduler has
4882 moved instructions into the prologue. We look ahead in
4883 the function looking for address ranges whose
4884 corresponding line number is less the first one that we
4885 found for the function. This is more conservative then
4886 refine_prologue_limit which scans a large number of SALs
4887 looking for any in the prologue. */
4892 if (prologue_sal
.end
< end_pc
)
4893 /* Return the end of this line, or zero if we could not find a
4895 return prologue_sal
.end
;
4897 /* Don't return END_PC, which is past the end of the function. */
4898 return prologue_sal
.pc
;
4902 static char *name_of_main
;
4903 enum language language_of_main
= language_unknown
;
4906 set_main_name (const char *name
)
4908 if (name_of_main
!= NULL
)
4910 xfree (name_of_main
);
4911 name_of_main
= NULL
;
4912 language_of_main
= language_unknown
;
4916 name_of_main
= xstrdup (name
);
4917 language_of_main
= language_unknown
;
4921 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4925 find_main_name (void)
4927 const char *new_main_name
;
4929 /* Try to see if the main procedure is in Ada. */
4930 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4931 be to add a new method in the language vector, and call this
4932 method for each language until one of them returns a non-empty
4933 name. This would allow us to remove this hard-coded call to
4934 an Ada function. It is not clear that this is a better approach
4935 at this point, because all methods need to be written in a way
4936 such that false positives never be returned. For instance, it is
4937 important that a method does not return a wrong name for the main
4938 procedure if the main procedure is actually written in a different
4939 language. It is easy to guaranty this with Ada, since we use a
4940 special symbol generated only when the main in Ada to find the name
4941 of the main procedure. It is difficult however to see how this can
4942 be guarantied for languages such as C, for instance. This suggests
4943 that order of call for these methods becomes important, which means
4944 a more complicated approach. */
4945 new_main_name
= ada_main_name ();
4946 if (new_main_name
!= NULL
)
4948 set_main_name (new_main_name
);
4952 new_main_name
= go_main_name ();
4953 if (new_main_name
!= NULL
)
4955 set_main_name (new_main_name
);
4959 new_main_name
= pascal_main_name ();
4960 if (new_main_name
!= NULL
)
4962 set_main_name (new_main_name
);
4966 /* The languages above didn't identify the name of the main procedure.
4967 Fallback to "main". */
4968 set_main_name ("main");
4974 if (name_of_main
== NULL
)
4977 return name_of_main
;
4980 /* Handle ``executable_changed'' events for the symtab module. */
4983 symtab_observer_executable_changed (void)
4985 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4986 set_main_name (NULL
);
4989 /* Return 1 if the supplied producer string matches the ARM RealView
4990 compiler (armcc). */
4993 producer_is_realview (const char *producer
)
4995 static const char *const arm_idents
[] = {
4996 "ARM C Compiler, ADS",
4997 "Thumb C Compiler, ADS",
4998 "ARM C++ Compiler, ADS",
4999 "Thumb C++ Compiler, ADS",
5000 "ARM/Thumb C/C++ Compiler, RVCT",
5001 "ARM C/C++ Compiler, RVCT"
5005 if (producer
== NULL
)
5008 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5009 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
5016 _initialize_symtab (void)
5018 add_info ("variables", variables_info
, _("\
5019 All global and static variable names, or those matching REGEXP."));
5021 add_com ("whereis", class_info
, variables_info
, _("\
5022 All global and static variable names, or those matching REGEXP."));
5024 add_info ("functions", functions_info
,
5025 _("All function names, or those matching REGEXP."));
5027 /* FIXME: This command has at least the following problems:
5028 1. It prints builtin types (in a very strange and confusing fashion).
5029 2. It doesn't print right, e.g. with
5030 typedef struct foo *FOO
5031 type_print prints "FOO" when we want to make it (in this situation)
5032 print "struct foo *".
5033 I also think "ptype" or "whatis" is more likely to be useful (but if
5034 there is much disagreement "info types" can be fixed). */
5035 add_info ("types", types_info
,
5036 _("All type names, or those matching REGEXP."));
5038 add_info ("sources", sources_info
,
5039 _("Source files in the program."));
5041 add_com ("rbreak", class_breakpoint
, rbreak_command
,
5042 _("Set a breakpoint for all functions matching REGEXP."));
5046 add_com ("lf", class_info
, sources_info
,
5047 _("Source files in the program"));
5048 add_com ("lg", class_info
, variables_info
, _("\
5049 All global and static variable names, or those matching REGEXP."));
5052 add_setshow_enum_cmd ("multiple-symbols", no_class
,
5053 multiple_symbols_modes
, &multiple_symbols_mode
,
5055 Set the debugger behavior when more than one symbol are possible matches\n\
5056 in an expression."), _("\
5057 Show how the debugger handles ambiguities in expressions."), _("\
5058 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5059 NULL
, NULL
, &setlist
, &showlist
);
5061 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
5062 &basenames_may_differ
, _("\
5063 Set whether a source file may have multiple base names."), _("\
5064 Show whether a source file may have multiple base names."), _("\
5065 (A \"base name\" is the name of a file with the directory part removed.\n\
5066 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5067 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5068 before comparing them. Canonicalization is an expensive operation,\n\
5069 but it allows the same file be known by more than one base name.\n\
5070 If not set (the default), all source files are assumed to have just\n\
5071 one base name, and gdb will do file name comparisons more efficiently."),
5073 &setlist
, &showlist
);
5075 add_setshow_boolean_cmd ("symtab-create", no_class
, &symtab_create_debug
,
5076 _("Set debugging of symbol table creation."),
5077 _("Show debugging of symbol table creation."), _("\
5078 When enabled, debugging messages are printed when building symbol tables."),
5081 &setdebuglist
, &showdebuglist
);
5083 observer_attach_executable_changed (symtab_observer_executable_changed
);