1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "call-cmds.h"
33 #include "gdb_regex.h"
34 #include "expression.h"
40 #include "filenames.h" /* for FILENAME_CMP */
41 #include "objc-lang.h"
48 #include "gdb_obstack.h"
50 #include "dictionary.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
59 #include "gdb_assert.h"
62 /* Prototypes for local functions */
64 static void completion_list_add_name (char *, char *, int, char *, char *);
66 static void rbreak_command (char *, int);
68 static void types_info (char *, int);
70 static void functions_info (char *, int);
72 static void variables_info (char *, int);
74 static void sources_info (char *, int);
76 static void output_source_filename (const char *, int *);
78 static int find_line_common (struct linetable
*, int, int *);
80 /* This one is used by linespec.c */
82 char *operator_chars (char *p
, char **end
);
84 static struct symbol
*lookup_symbol_aux (const char *name
,
85 const char *linkage_name
,
86 const struct block
*block
,
87 const domain_enum domain
,
88 enum language language
,
89 int *is_a_field_of_this
,
90 struct symtab
**symtab
);
93 struct symbol
*lookup_symbol_aux_local (const char *name
,
94 const char *linkage_name
,
95 const struct block
*block
,
96 const domain_enum domain
,
97 struct symtab
**symtab
);
100 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
102 const char *linkage_name
,
103 const domain_enum domain
,
104 struct symtab
**symtab
);
107 struct symbol
*lookup_symbol_aux_psymtabs (int block_index
,
109 const char *linkage_name
,
110 const domain_enum domain
,
111 struct symtab
**symtab
);
113 static int file_matches (char *, char **, int);
115 static void print_symbol_info (domain_enum
,
116 struct symtab
*, struct symbol
*, int, char *);
118 static void print_msymbol_info (struct minimal_symbol
*);
120 static void symtab_symbol_info (char *, domain_enum
, int);
122 void _initialize_symtab (void);
126 /* Allow the user to configure the debugger behavior with respect
127 to multiple-choice menus when more than one symbol matches during
130 const char multiple_symbols_ask
[] = "ask";
131 const char multiple_symbols_all
[] = "all";
132 const char multiple_symbols_cancel
[] = "cancel";
133 static const char *multiple_symbols_modes
[] =
135 multiple_symbols_ask
,
136 multiple_symbols_all
,
137 multiple_symbols_cancel
,
140 static const char *multiple_symbols_mode
= multiple_symbols_all
;
142 /* Read-only accessor to AUTO_SELECT_MODE. */
145 multiple_symbols_select_mode (void)
147 return multiple_symbols_mode
;
150 /* The single non-language-specific builtin type */
151 struct type
*builtin_type_error
;
153 /* Block in which the most recently searched-for symbol was found.
154 Might be better to make this a parameter to lookup_symbol and
157 const struct block
*block_found
;
159 /* Check for a symtab of a specific name; first in symtabs, then in
160 psymtabs. *If* there is no '/' in the name, a match after a '/'
161 in the symtab filename will also work. */
164 lookup_symtab (const char *name
)
167 struct partial_symtab
*ps
;
168 struct objfile
*objfile
;
169 char *real_path
= NULL
;
170 char *full_path
= NULL
;
172 /* Here we are interested in canonicalizing an absolute path, not
173 absolutizing a relative path. */
174 if (IS_ABSOLUTE_PATH (name
))
176 full_path
= xfullpath (name
);
177 make_cleanup (xfree
, full_path
);
178 real_path
= gdb_realpath (name
);
179 make_cleanup (xfree
, real_path
);
184 /* First, search for an exact match */
186 ALL_SYMTABS (objfile
, s
)
188 if (FILENAME_CMP (name
, s
->filename
) == 0)
193 /* If the user gave us an absolute path, try to find the file in
194 this symtab and use its absolute path. */
196 if (full_path
!= NULL
)
198 const char *fp
= symtab_to_fullname (s
);
199 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
205 if (real_path
!= NULL
)
207 char *fullname
= symtab_to_fullname (s
);
208 if (fullname
!= NULL
)
210 char *rp
= gdb_realpath (fullname
);
211 make_cleanup (xfree
, rp
);
212 if (FILENAME_CMP (real_path
, rp
) == 0)
220 /* Now, search for a matching tail (only if name doesn't have any dirs) */
222 if (lbasename (name
) == name
)
223 ALL_SYMTABS (objfile
, s
)
225 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
229 /* Same search rules as above apply here, but now we look thru the
232 ps
= lookup_partial_symtab (name
);
237 error (_("Internal: readin %s pst for `%s' found when no symtab found."),
240 s
= PSYMTAB_TO_SYMTAB (ps
);
245 /* At this point, we have located the psymtab for this file, but
246 the conversion to a symtab has failed. This usually happens
247 when we are looking up an include file. In this case,
248 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
249 been created. So, we need to run through the symtabs again in
250 order to find the file.
251 XXX - This is a crock, and should be fixed inside of the the
252 symbol parsing routines. */
256 /* Lookup the partial symbol table of a source file named NAME.
257 *If* there is no '/' in the name, a match after a '/'
258 in the psymtab filename will also work. */
260 struct partial_symtab
*
261 lookup_partial_symtab (const char *name
)
263 struct partial_symtab
*pst
;
264 struct objfile
*objfile
;
265 char *full_path
= NULL
;
266 char *real_path
= NULL
;
268 /* Here we are interested in canonicalizing an absolute path, not
269 absolutizing a relative path. */
270 if (IS_ABSOLUTE_PATH (name
))
272 full_path
= xfullpath (name
);
273 make_cleanup (xfree
, full_path
);
274 real_path
= gdb_realpath (name
);
275 make_cleanup (xfree
, real_path
);
278 ALL_PSYMTABS (objfile
, pst
)
280 if (FILENAME_CMP (name
, pst
->filename
) == 0)
285 /* If the user gave us an absolute path, try to find the file in
286 this symtab and use its absolute path. */
287 if (full_path
!= NULL
)
289 psymtab_to_fullname (pst
);
290 if (pst
->fullname
!= NULL
291 && FILENAME_CMP (full_path
, pst
->fullname
) == 0)
297 if (real_path
!= NULL
)
300 psymtab_to_fullname (pst
);
301 if (pst
->fullname
!= NULL
)
303 rp
= gdb_realpath (pst
->fullname
);
304 make_cleanup (xfree
, rp
);
306 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
313 /* Now, search for a matching tail (only if name doesn't have any dirs) */
315 if (lbasename (name
) == name
)
316 ALL_PSYMTABS (objfile
, pst
)
318 if (FILENAME_CMP (lbasename (pst
->filename
), name
) == 0)
325 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
326 full method name, which consist of the class name (from T), the unadorned
327 method name from METHOD_ID, and the signature for the specific overload,
328 specified by SIGNATURE_ID. Note that this function is g++ specific. */
331 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
333 int mangled_name_len
;
335 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
336 struct fn_field
*method
= &f
[signature_id
];
337 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
338 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
339 char *newname
= type_name_no_tag (type
);
341 /* Does the form of physname indicate that it is the full mangled name
342 of a constructor (not just the args)? */
343 int is_full_physname_constructor
;
346 int is_destructor
= is_destructor_name (physname
);
347 /* Need a new type prefix. */
348 char *const_prefix
= method
->is_const
? "C" : "";
349 char *volatile_prefix
= method
->is_volatile
? "V" : "";
351 int len
= (newname
== NULL
? 0 : strlen (newname
));
353 /* Nothing to do if physname already contains a fully mangled v3 abi name
354 or an operator name. */
355 if ((physname
[0] == '_' && physname
[1] == 'Z')
356 || is_operator_name (field_name
))
357 return xstrdup (physname
);
359 is_full_physname_constructor
= is_constructor_name (physname
);
362 is_full_physname_constructor
|| (newname
&& strcmp (field_name
, newname
) == 0);
365 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
367 if (is_destructor
|| is_full_physname_constructor
)
369 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
370 strcpy (mangled_name
, physname
);
376 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
378 else if (physname
[0] == 't' || physname
[0] == 'Q')
380 /* The physname for template and qualified methods already includes
382 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
388 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
390 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
391 + strlen (buf
) + len
+ strlen (physname
) + 1);
394 mangled_name
= (char *) xmalloc (mangled_name_len
);
396 mangled_name
[0] = '\0';
398 strcpy (mangled_name
, field_name
);
400 strcat (mangled_name
, buf
);
401 /* If the class doesn't have a name, i.e. newname NULL, then we just
402 mangle it using 0 for the length of the class. Thus it gets mangled
403 as something starting with `::' rather than `classname::'. */
405 strcat (mangled_name
, newname
);
407 strcat (mangled_name
, physname
);
408 return (mangled_name
);
412 /* Initialize the language dependent portion of a symbol
413 depending upon the language for the symbol. */
415 symbol_init_language_specific (struct general_symbol_info
*gsymbol
,
416 enum language language
)
418 gsymbol
->language
= language
;
419 if (gsymbol
->language
== language_cplus
420 || gsymbol
->language
== language_java
421 || gsymbol
->language
== language_objc
)
423 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
427 memset (&gsymbol
->language_specific
, 0,
428 sizeof (gsymbol
->language_specific
));
432 /* Functions to initialize a symbol's mangled name. */
434 /* Create the hash table used for demangled names. Each hash entry is
435 a pair of strings; one for the mangled name and one for the demangled
436 name. The entry is hashed via just the mangled name. */
439 create_demangled_names_hash (struct objfile
*objfile
)
441 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
442 The hash table code will round this up to the next prime number.
443 Choosing a much larger table size wastes memory, and saves only about
444 1% in symbol reading. */
446 objfile
->demangled_names_hash
= htab_create_alloc
447 (256, htab_hash_string
, (int (*) (const void *, const void *)) streq
,
448 NULL
, xcalloc
, xfree
);
451 /* Try to determine the demangled name for a symbol, based on the
452 language of that symbol. If the language is set to language_auto,
453 it will attempt to find any demangling algorithm that works and
454 then set the language appropriately. The returned name is allocated
455 by the demangler and should be xfree'd. */
458 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
461 char *demangled
= NULL
;
463 if (gsymbol
->language
== language_unknown
)
464 gsymbol
->language
= language_auto
;
466 if (gsymbol
->language
== language_objc
467 || gsymbol
->language
== language_auto
)
470 objc_demangle (mangled
, 0);
471 if (demangled
!= NULL
)
473 gsymbol
->language
= language_objc
;
477 if (gsymbol
->language
== language_cplus
478 || gsymbol
->language
== language_auto
)
481 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
482 if (demangled
!= NULL
)
484 gsymbol
->language
= language_cplus
;
488 if (gsymbol
->language
== language_java
)
491 cplus_demangle (mangled
,
492 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
493 if (demangled
!= NULL
)
495 gsymbol
->language
= language_java
;
502 /* Set both the mangled and demangled (if any) names for GSYMBOL based
503 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
504 is used, and the memory comes from that objfile's objfile_obstack.
505 LINKAGE_NAME is copied, so the pointer can be discarded after
506 calling this function. */
508 /* We have to be careful when dealing with Java names: when we run
509 into a Java minimal symbol, we don't know it's a Java symbol, so it
510 gets demangled as a C++ name. This is unfortunate, but there's not
511 much we can do about it: but when demangling partial symbols and
512 regular symbols, we'd better not reuse the wrong demangled name.
513 (See PR gdb/1039.) We solve this by putting a distinctive prefix
514 on Java names when storing them in the hash table. */
516 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
517 don't mind the Java prefix so much: different languages have
518 different demangling requirements, so it's only natural that we
519 need to keep language data around in our demangling cache. But
520 it's not good that the minimal symbol has the wrong demangled name.
521 Unfortunately, I can't think of any easy solution to that
524 #define JAVA_PREFIX "##JAVA$$"
525 #define JAVA_PREFIX_LEN 8
528 symbol_set_names (struct general_symbol_info
*gsymbol
,
529 const char *linkage_name
, int len
, struct objfile
*objfile
)
532 /* A 0-terminated copy of the linkage name. */
533 const char *linkage_name_copy
;
534 /* A copy of the linkage name that might have a special Java prefix
535 added to it, for use when looking names up in the hash table. */
536 const char *lookup_name
;
537 /* The length of lookup_name. */
540 if (objfile
->demangled_names_hash
== NULL
)
541 create_demangled_names_hash (objfile
);
543 if (gsymbol
->language
== language_ada
)
545 /* In Ada, we do the symbol lookups using the mangled name, so
546 we can save some space by not storing the demangled name.
548 As a side note, we have also observed some overlap between
549 the C++ mangling and Ada mangling, similarly to what has
550 been observed with Java. Because we don't store the demangled
551 name with the symbol, we don't need to use the same trick
553 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
554 memcpy (gsymbol
->name
, linkage_name
, len
);
555 gsymbol
->name
[len
] = '\0';
556 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
561 /* The stabs reader generally provides names that are not
562 NUL-terminated; most of the other readers don't do this, so we
563 can just use the given copy, unless we're in the Java case. */
564 if (gsymbol
->language
== language_java
)
567 lookup_len
= len
+ JAVA_PREFIX_LEN
;
569 alloc_name
= alloca (lookup_len
+ 1);
570 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
571 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
572 alloc_name
[lookup_len
] = '\0';
574 lookup_name
= alloc_name
;
575 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
577 else if (linkage_name
[len
] != '\0')
582 alloc_name
= alloca (lookup_len
+ 1);
583 memcpy (alloc_name
, linkage_name
, len
);
584 alloc_name
[lookup_len
] = '\0';
586 lookup_name
= alloc_name
;
587 linkage_name_copy
= alloc_name
;
592 lookup_name
= linkage_name
;
593 linkage_name_copy
= linkage_name
;
596 slot
= (char **) htab_find_slot (objfile
->demangled_names_hash
,
597 lookup_name
, INSERT
);
599 /* If this name is not in the hash table, add it. */
602 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
604 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
606 /* If there is a demangled name, place it right after the mangled name.
607 Otherwise, just place a second zero byte after the end of the mangled
609 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
610 lookup_len
+ demangled_len
+ 2);
611 memcpy (*slot
, lookup_name
, lookup_len
+ 1);
612 if (demangled_name
!= NULL
)
614 memcpy (*slot
+ lookup_len
+ 1, demangled_name
, demangled_len
+ 1);
615 xfree (demangled_name
);
618 (*slot
)[lookup_len
+ 1] = '\0';
621 gsymbol
->name
= *slot
+ lookup_len
- len
;
622 if ((*slot
)[lookup_len
+ 1] != '\0')
623 gsymbol
->language_specific
.cplus_specific
.demangled_name
624 = &(*slot
)[lookup_len
+ 1];
626 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
629 /* Return the source code name of a symbol. In languages where
630 demangling is necessary, this is the demangled name. */
633 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
635 switch (gsymbol
->language
)
640 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
641 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
644 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
645 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
647 return ada_decode_symbol (gsymbol
);
652 return gsymbol
->name
;
655 /* Return the demangled name for a symbol based on the language for
656 that symbol. If no demangled name exists, return NULL. */
658 symbol_demangled_name (struct general_symbol_info
*gsymbol
)
660 switch (gsymbol
->language
)
665 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
666 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
669 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
670 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
672 return ada_decode_symbol (gsymbol
);
680 /* Return the search name of a symbol---generally the demangled or
681 linkage name of the symbol, depending on how it will be searched for.
682 If there is no distinct demangled name, then returns the same value
683 (same pointer) as SYMBOL_LINKAGE_NAME. */
685 symbol_search_name (const struct general_symbol_info
*gsymbol
)
687 if (gsymbol
->language
== language_ada
)
688 return gsymbol
->name
;
690 return symbol_natural_name (gsymbol
);
693 /* Initialize the structure fields to zero values. */
695 init_sal (struct symtab_and_line
*sal
)
702 sal
->explicit_pc
= 0;
703 sal
->explicit_line
= 0;
707 /* Return 1 if the two sections are the same, or if they could
708 plausibly be copies of each other, one in an original object
709 file and another in a separated debug file. */
712 matching_bfd_sections (asection
*first
, asection
*second
)
716 /* If they're the same section, then they match. */
720 /* If either is NULL, give up. */
721 if (first
== NULL
|| second
== NULL
)
724 /* This doesn't apply to absolute symbols. */
725 if (first
->owner
== NULL
|| second
->owner
== NULL
)
728 /* If they're in the same object file, they must be different sections. */
729 if (first
->owner
== second
->owner
)
732 /* Check whether the two sections are potentially corresponding. They must
733 have the same size, address, and name. We can't compare section indexes,
734 which would be more reliable, because some sections may have been
736 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
739 /* In-memory addresses may start at a different offset, relativize them. */
740 if (bfd_get_section_vma (first
->owner
, first
)
741 - bfd_get_start_address (first
->owner
)
742 != bfd_get_section_vma (second
->owner
, second
)
743 - bfd_get_start_address (second
->owner
))
746 if (bfd_get_section_name (first
->owner
, first
) == NULL
747 || bfd_get_section_name (second
->owner
, second
) == NULL
748 || strcmp (bfd_get_section_name (first
->owner
, first
),
749 bfd_get_section_name (second
->owner
, second
)) != 0)
752 /* Otherwise check that they are in corresponding objfiles. */
755 if (obj
->obfd
== first
->owner
)
757 gdb_assert (obj
!= NULL
);
759 if (obj
->separate_debug_objfile
!= NULL
760 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
762 if (obj
->separate_debug_objfile_backlink
!= NULL
763 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
769 /* Find which partial symtab contains PC and SECTION starting at psymtab PST.
770 We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */
772 struct partial_symtab
*
773 find_pc_sect_psymtab_closer (CORE_ADDR pc
, asection
*section
,
774 struct partial_symtab
*pst
,
775 struct minimal_symbol
*msymbol
)
777 struct objfile
*objfile
= pst
->objfile
;
778 struct partial_symtab
*tpst
;
779 struct partial_symtab
*best_pst
= pst
;
780 CORE_ADDR best_addr
= pst
->textlow
;
782 /* An objfile that has its functions reordered might have
783 many partial symbol tables containing the PC, but
784 we want the partial symbol table that contains the
785 function containing the PC. */
786 if (!(objfile
->flags
& OBJF_REORDERED
) &&
787 section
== 0) /* can't validate section this way */
793 /* The code range of partial symtabs sometimes overlap, so, in
794 the loop below, we need to check all partial symtabs and
795 find the one that fits better for the given PC address. We
796 select the partial symtab that contains a symbol whose
797 address is closest to the PC address. By closest we mean
798 that find_pc_sect_symbol returns the symbol with address
799 that is closest and still less than the given PC. */
800 for (tpst
= pst
; tpst
!= NULL
; tpst
= tpst
->next
)
802 if (pc
>= tpst
->textlow
&& pc
< tpst
->texthigh
)
804 struct partial_symbol
*p
;
807 /* NOTE: This assumes that every psymbol has a
808 corresponding msymbol, which is not necessarily
809 true; the debug info might be much richer than the
810 object's symbol table. */
811 p
= find_pc_sect_psymbol (tpst
, pc
, section
);
813 && SYMBOL_VALUE_ADDRESS (p
)
814 == SYMBOL_VALUE_ADDRESS (msymbol
))
817 /* Also accept the textlow value of a psymtab as a
818 "symbol", to provide some support for partial
819 symbol tables with line information but no debug
820 symbols (e.g. those produced by an assembler). */
822 this_addr
= SYMBOL_VALUE_ADDRESS (p
);
824 this_addr
= tpst
->textlow
;
826 /* Check whether it is closer than our current
827 BEST_ADDR. Since this symbol address is
828 necessarily lower or equal to PC, the symbol closer
829 to PC is the symbol which address is the highest.
830 This way we return the psymtab which contains such
831 best match symbol. This can help in cases where the
832 symbol information/debuginfo is not complete, like
833 for instance on IRIX6 with gcc, where no debug info
834 is emitted for statics. (See also the nodebug.exp
836 if (this_addr
> best_addr
)
838 best_addr
= this_addr
;
846 /* Find which partial symtab contains PC and SECTION. Return 0 if
847 none. We return the psymtab that contains a symbol whose address
848 exactly matches PC, or, if we cannot find an exact match, the
849 psymtab that contains a symbol whose address is closest to PC. */
850 struct partial_symtab
*
851 find_pc_sect_psymtab (CORE_ADDR pc
, asection
*section
)
853 struct objfile
*objfile
;
854 struct minimal_symbol
*msymbol
;
856 /* If we know that this is not a text address, return failure. This is
857 necessary because we loop based on texthigh and textlow, which do
858 not include the data ranges. */
859 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
861 && (msymbol
->type
== mst_data
862 || msymbol
->type
== mst_bss
863 || msymbol
->type
== mst_abs
864 || msymbol
->type
== mst_file_data
865 || msymbol
->type
== mst_file_bss
))
868 /* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
869 than the later used TEXTLOW/TEXTHIGH one. */
871 ALL_OBJFILES (objfile
)
872 if (objfile
->psymtabs_addrmap
!= NULL
)
874 struct partial_symtab
*pst
;
876 pst
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
879 /* FIXME: addrmaps currently do not handle overlayed sections,
880 so fall back to the non-addrmap case if we're debugging
881 overlays and the addrmap returned the wrong section. */
882 if (overlay_debugging
&& msymbol
&& section
)
884 struct partial_symbol
*p
;
885 /* NOTE: This assumes that every psymbol has a
886 corresponding msymbol, which is not necessarily
887 true; the debug info might be much richer than the
888 object's symbol table. */
889 p
= find_pc_sect_psymbol (pst
, pc
, section
);
891 || SYMBOL_VALUE_ADDRESS (p
)
892 != SYMBOL_VALUE_ADDRESS (msymbol
))
896 /* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as
897 PSYMTABS_ADDRMAP we used has already the best 1-byte
898 granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into
899 a worse chosen section due to the TEXTLOW/TEXTHIGH ranges
906 /* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
907 which still have no corresponding full SYMTABs read. But it is not
908 present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB
911 ALL_OBJFILES (objfile
)
913 struct partial_symtab
*pst
;
915 /* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of
916 its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying
917 debug info type in single OBJFILE. */
919 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
920 if (pc
>= pst
->textlow
&& pc
< pst
->texthigh
)
922 struct partial_symtab
*best_pst
;
924 best_pst
= find_pc_sect_psymtab_closer (pc
, section
, pst
,
926 if (best_pst
!= NULL
)
934 /* Find which partial symtab contains PC. Return 0 if none.
935 Backward compatibility, no section */
937 struct partial_symtab
*
938 find_pc_psymtab (CORE_ADDR pc
)
940 return find_pc_sect_psymtab (pc
, find_pc_mapped_section (pc
));
943 /* Find which partial symbol within a psymtab matches PC and SECTION.
944 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
946 struct partial_symbol
*
947 find_pc_sect_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
,
950 struct partial_symbol
*best
= NULL
, *p
, **pp
;
954 psymtab
= find_pc_sect_psymtab (pc
, section
);
958 /* Cope with programs that start at address 0 */
959 best_pc
= (psymtab
->textlow
!= 0) ? psymtab
->textlow
- 1 : 0;
961 /* Search the global symbols as well as the static symbols, so that
962 find_pc_partial_function doesn't use a minimal symbol and thus
963 cache a bad endaddr. */
964 for (pp
= psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
;
965 (pp
- (psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
)
966 < psymtab
->n_global_syms
);
970 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
971 && SYMBOL_CLASS (p
) == LOC_BLOCK
972 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
973 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
974 || (psymtab
->textlow
== 0
975 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
977 if (section
) /* match on a specific section */
979 fixup_psymbol_section (p
, psymtab
->objfile
);
980 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p
), section
))
983 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
988 for (pp
= psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
;
989 (pp
- (psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
)
990 < psymtab
->n_static_syms
);
994 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
995 && SYMBOL_CLASS (p
) == LOC_BLOCK
996 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
997 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
998 || (psymtab
->textlow
== 0
999 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
1001 if (section
) /* match on a specific section */
1003 fixup_psymbol_section (p
, psymtab
->objfile
);
1004 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p
), section
))
1007 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
1015 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
1016 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
1018 struct partial_symbol
*
1019 find_pc_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
)
1021 return find_pc_sect_psymbol (psymtab
, pc
, find_pc_mapped_section (pc
));
1024 /* Debug symbols usually don't have section information. We need to dig that
1025 out of the minimal symbols and stash that in the debug symbol. */
1028 fixup_section (struct general_symbol_info
*ginfo
,
1029 CORE_ADDR addr
, struct objfile
*objfile
)
1031 struct minimal_symbol
*msym
;
1033 /* First, check whether a minimal symbol with the same name exists
1034 and points to the same address. The address check is required
1035 e.g. on PowerPC64, where the minimal symbol for a function will
1036 point to the function descriptor, while the debug symbol will
1037 point to the actual function code. */
1038 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1041 ginfo
->bfd_section
= SYMBOL_BFD_SECTION (msym
);
1042 ginfo
->section
= SYMBOL_SECTION (msym
);
1046 /* Static, function-local variables do appear in the linker
1047 (minimal) symbols, but are frequently given names that won't
1048 be found via lookup_minimal_symbol(). E.g., it has been
1049 observed in frv-uclinux (ELF) executables that a static,
1050 function-local variable named "foo" might appear in the
1051 linker symbols as "foo.6" or "foo.3". Thus, there is no
1052 point in attempting to extend the lookup-by-name mechanism to
1053 handle this case due to the fact that there can be multiple
1056 So, instead, search the section table when lookup by name has
1057 failed. The ``addr'' and ``endaddr'' fields may have already
1058 been relocated. If so, the relocation offset (i.e. the
1059 ANOFFSET value) needs to be subtracted from these values when
1060 performing the comparison. We unconditionally subtract it,
1061 because, when no relocation has been performed, the ANOFFSET
1062 value will simply be zero.
1064 The address of the symbol whose section we're fixing up HAS
1065 NOT BEEN adjusted (relocated) yet. It can't have been since
1066 the section isn't yet known and knowing the section is
1067 necessary in order to add the correct relocation value. In
1068 other words, we wouldn't even be in this function (attempting
1069 to compute the section) if it were already known.
1071 Note that it is possible to search the minimal symbols
1072 (subtracting the relocation value if necessary) to find the
1073 matching minimal symbol, but this is overkill and much less
1074 efficient. It is not necessary to find the matching minimal
1075 symbol, only its section.
1077 Note that this technique (of doing a section table search)
1078 can fail when unrelocated section addresses overlap. For
1079 this reason, we still attempt a lookup by name prior to doing
1080 a search of the section table. */
1082 struct obj_section
*s
;
1083 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1085 int idx
= s
->the_bfd_section
->index
;
1086 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1088 if (s
->addr
- offset
<= addr
&& addr
< s
->endaddr
- offset
)
1090 ginfo
->bfd_section
= s
->the_bfd_section
;
1091 ginfo
->section
= idx
;
1099 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1106 if (SYMBOL_BFD_SECTION (sym
))
1109 /* We either have an OBJFILE, or we can get at it from the sym's
1110 symtab. Anything else is a bug. */
1111 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1113 if (objfile
== NULL
)
1114 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1116 /* We should have an objfile by now. */
1117 gdb_assert (objfile
);
1119 switch (SYMBOL_CLASS (sym
))
1124 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1127 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1131 /* Nothing else will be listed in the minsyms -- no use looking
1136 fixup_section (&sym
->ginfo
, addr
, objfile
);
1141 struct partial_symbol
*
1142 fixup_psymbol_section (struct partial_symbol
*psym
, struct objfile
*objfile
)
1149 if (SYMBOL_BFD_SECTION (psym
))
1152 gdb_assert (objfile
);
1154 switch (SYMBOL_CLASS (psym
))
1160 addr
= SYMBOL_VALUE_ADDRESS (psym
);
1163 /* Nothing else will be listed in the minsyms -- no use looking
1168 fixup_section (&psym
->ginfo
, addr
, objfile
);
1173 /* Find the definition for a specified symbol name NAME
1174 in domain DOMAIN, visible from lexical block BLOCK.
1175 Returns the struct symbol pointer, or zero if no symbol is found.
1176 If SYMTAB is non-NULL, store the symbol table in which the
1177 symbol was found there, or NULL if not found.
1178 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1179 NAME is a field of the current implied argument `this'. If so set
1180 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1181 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1182 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1184 /* This function has a bunch of loops in it and it would seem to be
1185 attractive to put in some QUIT's (though I'm not really sure
1186 whether it can run long enough to be really important). But there
1187 are a few calls for which it would appear to be bad news to quit
1188 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1189 that there is C++ code below which can error(), but that probably
1190 doesn't affect these calls since they are looking for a known
1191 variable and thus can probably assume it will never hit the C++
1195 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1196 const domain_enum domain
, enum language lang
,
1197 int *is_a_field_of_this
,
1198 struct symtab
**symtab
)
1200 char *demangled_name
= NULL
;
1201 const char *modified_name
= NULL
;
1202 const char *mangled_name
= NULL
;
1203 int needtofreename
= 0;
1204 struct symbol
*returnval
;
1206 modified_name
= name
;
1208 /* If we are using C++ or Java, demangle the name before doing a lookup, so
1209 we can always binary search. */
1210 if (lang
== language_cplus
)
1212 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1215 mangled_name
= name
;
1216 modified_name
= demangled_name
;
1220 else if (lang
== language_java
)
1222 demangled_name
= cplus_demangle (name
,
1223 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1226 mangled_name
= name
;
1227 modified_name
= demangled_name
;
1232 if (case_sensitivity
== case_sensitive_off
)
1237 len
= strlen (name
);
1238 copy
= (char *) alloca (len
+ 1);
1239 for (i
= 0; i
< len
; i
++)
1240 copy
[i
] = tolower (name
[i
]);
1242 modified_name
= copy
;
1245 returnval
= lookup_symbol_aux (modified_name
, mangled_name
, block
,
1247 is_a_field_of_this
, symtab
);
1249 xfree (demangled_name
);
1251 /* Override the returned symtab with the symbol's specific one. */
1252 if (returnval
!= NULL
&& symtab
!= NULL
)
1253 *symtab
= SYMBOL_SYMTAB (returnval
);
1258 /* Behave like lookup_symbol_in_language, but performed with the
1259 current language. */
1262 lookup_symbol (const char *name
, const struct block
*block
,
1263 domain_enum domain
, int *is_a_field_of_this
,
1264 struct symtab
**symtab
)
1266 return lookup_symbol_in_language (name
, block
, domain
,
1267 current_language
->la_language
,
1268 is_a_field_of_this
, symtab
);
1271 /* Behave like lookup_symbol except that NAME is the natural name
1272 of the symbol that we're looking for and, if LINKAGE_NAME is
1273 non-NULL, ensure that the symbol's linkage name matches as
1276 static struct symbol
*
1277 lookup_symbol_aux (const char *name
, const char *linkage_name
,
1278 const struct block
*block
, const domain_enum domain
,
1279 enum language language
,
1280 int *is_a_field_of_this
, struct symtab
**symtab
)
1283 const struct language_defn
*langdef
;
1285 /* Make sure we do something sensible with is_a_field_of_this, since
1286 the callers that set this parameter to some non-null value will
1287 certainly use it later and expect it to be either 0 or 1.
1288 If we don't set it, the contents of is_a_field_of_this are
1290 if (is_a_field_of_this
!= NULL
)
1291 *is_a_field_of_this
= 0;
1293 /* Search specified block and its superiors. Don't search
1294 STATIC_BLOCK or GLOBAL_BLOCK. */
1296 sym
= lookup_symbol_aux_local (name
, linkage_name
, block
, domain
,
1301 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1302 check to see if NAME is a field of `this'. */
1304 langdef
= language_def (language
);
1306 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1309 struct symbol
*sym
= NULL
;
1310 /* 'this' is only defined in the function's block, so find the
1311 enclosing function block. */
1312 for (; block
&& !BLOCK_FUNCTION (block
);
1313 block
= BLOCK_SUPERBLOCK (block
));
1315 if (block
&& !dict_empty (BLOCK_DICT (block
)))
1316 sym
= lookup_block_symbol (block
, langdef
->la_name_of_this
,
1320 struct type
*t
= sym
->type
;
1322 /* I'm not really sure that type of this can ever
1323 be typedefed; just be safe. */
1325 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1326 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1327 t
= TYPE_TARGET_TYPE (t
);
1329 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1330 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1331 error (_("Internal error: `%s' is not an aggregate"),
1332 langdef
->la_name_of_this
);
1334 if (check_field (t
, name
))
1336 *is_a_field_of_this
= 1;
1344 /* Now do whatever is appropriate for LANGUAGE to look
1345 up static and global variables. */
1347 sym
= langdef
->la_lookup_symbol_nonlocal (name
, linkage_name
,
1348 block
, domain
, symtab
);
1352 /* Now search all static file-level symbols. Not strictly correct,
1353 but more useful than an error. Do the symtabs first, then check
1354 the psymtabs. If a psymtab indicates the existence of the
1355 desired name as a file-level static, then do psymtab-to-symtab
1356 conversion on the fly and return the found symbol. */
1358 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, linkage_name
,
1363 sym
= lookup_symbol_aux_psymtabs (STATIC_BLOCK
, name
, linkage_name
,
1373 /* Check to see if the symbol is defined in BLOCK or its superiors.
1374 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1376 static struct symbol
*
1377 lookup_symbol_aux_local (const char *name
, const char *linkage_name
,
1378 const struct block
*block
,
1379 const domain_enum domain
,
1380 struct symtab
**symtab
)
1383 const struct block
*static_block
= block_static_block (block
);
1385 /* Check if either no block is specified or it's a global block. */
1387 if (static_block
== NULL
)
1390 while (block
!= static_block
)
1392 sym
= lookup_symbol_aux_block (name
, linkage_name
, block
, domain
,
1396 block
= BLOCK_SUPERBLOCK (block
);
1399 /* We've reached the static block without finding a result. */
1404 /* Look up OBJFILE to BLOCK. */
1406 static struct objfile
*
1407 lookup_objfile_from_block (const struct block
*block
)
1409 struct objfile
*obj
;
1415 block
= block_global_block (block
);
1416 /* Go through SYMTABS. */
1417 ALL_SYMTABS (obj
, s
)
1418 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1424 /* Look up a symbol in a block; if found, locate its symtab, fixup the
1425 symbol, and set block_found appropriately. */
1428 lookup_symbol_aux_block (const char *name
, const char *linkage_name
,
1429 const struct block
*block
,
1430 const domain_enum domain
,
1431 struct symtab
**symtab
)
1434 struct objfile
*objfile
= NULL
;
1435 struct blockvector
*bv
;
1437 struct symtab
*s
= NULL
;
1439 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1442 block_found
= block
;
1445 /* Search the list of symtabs for one which contains the
1446 address of the start of this block. */
1447 ALL_PRIMARY_SYMTABS (objfile
, s
)
1449 bv
= BLOCKVECTOR (s
);
1450 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1451 if (BLOCK_START (b
) <= BLOCK_START (block
)
1452 && BLOCK_END (b
) > BLOCK_START (block
))
1459 return fixup_symbol_section (sym
, objfile
);
1465 /* Check all global symbols in OBJFILE in symtabs and
1469 lookup_global_symbol_from_objfile (const struct objfile
*objfile
,
1471 const char *linkage_name
,
1472 const domain_enum domain
,
1473 struct symtab
**symtab
)
1476 struct blockvector
*bv
;
1477 const struct block
*block
;
1479 struct partial_symtab
*ps
;
1481 /* Go through symtabs. */
1482 ALL_OBJFILE_SYMTABS (objfile
, s
)
1484 bv
= BLOCKVECTOR (s
);
1485 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1486 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1489 block_found
= block
;
1492 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1496 /* Now go through psymtabs. */
1497 ALL_OBJFILE_PSYMTABS (objfile
, ps
)
1500 && lookup_partial_symbol (ps
, name
, linkage_name
,
1503 s
= PSYMTAB_TO_SYMTAB (ps
);
1504 bv
= BLOCKVECTOR (s
);
1505 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1506 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1509 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1513 if (objfile
->separate_debug_objfile
)
1514 return lookup_global_symbol_from_objfile (objfile
->separate_debug_objfile
,
1515 name
, linkage_name
, domain
,
1521 /* Check to see if the symbol is defined in one of the symtabs.
1522 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1523 depending on whether or not we want to search global symbols or
1526 static struct symbol
*
1527 lookup_symbol_aux_symtabs (int block_index
,
1528 const char *name
, const char *linkage_name
,
1529 const domain_enum domain
,
1530 struct symtab
**symtab
)
1533 struct objfile
*objfile
;
1534 struct blockvector
*bv
;
1535 const struct block
*block
;
1538 ALL_PRIMARY_SYMTABS (objfile
, s
)
1540 bv
= BLOCKVECTOR (s
);
1541 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1542 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1545 block_found
= block
;
1548 return fixup_symbol_section (sym
, objfile
);
1555 /* Check to see if the symbol is defined in one of the partial
1556 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1557 STATIC_BLOCK, depending on whether or not we want to search global
1558 symbols or static symbols. */
1560 static struct symbol
*
1561 lookup_symbol_aux_psymtabs (int block_index
, const char *name
,
1562 const char *linkage_name
,
1563 const domain_enum domain
,
1564 struct symtab
**symtab
)
1567 struct objfile
*objfile
;
1568 struct blockvector
*bv
;
1569 const struct block
*block
;
1570 struct partial_symtab
*ps
;
1572 const int psymtab_index
= (block_index
== GLOBAL_BLOCK
? 1 : 0);
1574 ALL_PSYMTABS (objfile
, ps
)
1577 && lookup_partial_symbol (ps
, name
, linkage_name
,
1578 psymtab_index
, domain
))
1580 s
= PSYMTAB_TO_SYMTAB (ps
);
1581 bv
= BLOCKVECTOR (s
);
1582 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1583 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1586 /* This shouldn't be necessary, but as a last resort try
1587 looking in the statics even though the psymtab claimed
1588 the symbol was global, or vice-versa. It's possible
1589 that the psymtab gets it wrong in some cases. */
1591 /* FIXME: carlton/2002-09-30: Should we really do that?
1592 If that happens, isn't it likely to be a GDB error, in
1593 which case we should fix the GDB error rather than
1594 silently dealing with it here? So I'd vote for
1595 removing the check for the symbol in the other
1597 block
= BLOCKVECTOR_BLOCK (bv
,
1598 block_index
== GLOBAL_BLOCK
?
1599 STATIC_BLOCK
: GLOBAL_BLOCK
);
1600 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1602 error (_("Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n%s may be an inlined function, or may be a template function\n(if a template, try specifying an instantiation: %s<type>)."),
1603 block_index
== GLOBAL_BLOCK
? "global" : "static",
1604 name
, ps
->filename
, name
, name
);
1608 return fixup_symbol_section (sym
, objfile
);
1615 /* A default version of lookup_symbol_nonlocal for use by languages
1616 that can't think of anything better to do. This implements the C
1620 basic_lookup_symbol_nonlocal (const char *name
,
1621 const char *linkage_name
,
1622 const struct block
*block
,
1623 const domain_enum domain
,
1624 struct symtab
**symtab
)
1628 /* NOTE: carlton/2003-05-19: The comments below were written when
1629 this (or what turned into this) was part of lookup_symbol_aux;
1630 I'm much less worried about these questions now, since these
1631 decisions have turned out well, but I leave these comments here
1634 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1635 not it would be appropriate to search the current global block
1636 here as well. (That's what this code used to do before the
1637 is_a_field_of_this check was moved up.) On the one hand, it's
1638 redundant with the lookup_symbol_aux_symtabs search that happens
1639 next. On the other hand, if decode_line_1 is passed an argument
1640 like filename:var, then the user presumably wants 'var' to be
1641 searched for in filename. On the third hand, there shouldn't be
1642 multiple global variables all of which are named 'var', and it's
1643 not like decode_line_1 has ever restricted its search to only
1644 global variables in a single filename. All in all, only
1645 searching the static block here seems best: it's correct and it's
1648 /* NOTE: carlton/2002-12-05: There's also a possible performance
1649 issue here: if you usually search for global symbols in the
1650 current file, then it would be slightly better to search the
1651 current global block before searching all the symtabs. But there
1652 are other factors that have a much greater effect on performance
1653 than that one, so I don't think we should worry about that for
1656 sym
= lookup_symbol_static (name
, linkage_name
, block
, domain
, symtab
);
1660 return lookup_symbol_global (name
, linkage_name
, block
, domain
, symtab
);
1663 /* Lookup a symbol in the static block associated to BLOCK, if there
1664 is one; do nothing if BLOCK is NULL or a global block. */
1667 lookup_symbol_static (const char *name
,
1668 const char *linkage_name
,
1669 const struct block
*block
,
1670 const domain_enum domain
,
1671 struct symtab
**symtab
)
1673 const struct block
*static_block
= block_static_block (block
);
1675 if (static_block
!= NULL
)
1676 return lookup_symbol_aux_block (name
, linkage_name
, static_block
,
1682 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1686 lookup_symbol_global (const char *name
,
1687 const char *linkage_name
,
1688 const struct block
*block
,
1689 const domain_enum domain
,
1690 struct symtab
**symtab
)
1692 struct symbol
*sym
= NULL
;
1693 struct objfile
*objfile
= NULL
;
1695 /* Call library-specific lookup procedure. */
1696 objfile
= lookup_objfile_from_block (block
);
1697 if (objfile
!= NULL
)
1698 sym
= solib_global_lookup (objfile
, name
, linkage_name
, domain
, symtab
);
1702 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, linkage_name
,
1707 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK
, name
, linkage_name
,
1712 symbol_matches_domain (enum language symbol_language
,
1713 domain_enum symbol_domain
,
1716 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1717 A Java class declaration also defines a typedef for the class.
1718 Similarly, any Ada type declaration implicitly defines a typedef. */
1719 if (symbol_language
== language_cplus
1720 || symbol_language
== language_java
1721 || symbol_language
== language_ada
)
1723 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1724 && symbol_domain
== STRUCT_DOMAIN
)
1727 /* For all other languages, strict match is required. */
1728 return (symbol_domain
== domain
);
1731 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1732 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1733 linkage name matches it. Check the global symbols if GLOBAL, the
1734 static symbols if not */
1736 struct partial_symbol
*
1737 lookup_partial_symbol (struct partial_symtab
*pst
, const char *name
,
1738 const char *linkage_name
, int global
,
1741 struct partial_symbol
*temp
;
1742 struct partial_symbol
**start
, **psym
;
1743 struct partial_symbol
**top
, **real_top
, **bottom
, **center
;
1744 int length
= (global
? pst
->n_global_syms
: pst
->n_static_syms
);
1745 int do_linear_search
= 1;
1752 pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
:
1753 pst
->objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1755 if (global
) /* This means we can use a binary search. */
1757 do_linear_search
= 0;
1759 /* Binary search. This search is guaranteed to end with center
1760 pointing at the earliest partial symbol whose name might be
1761 correct. At that point *all* partial symbols with an
1762 appropriate name will be checked against the correct
1766 top
= start
+ length
- 1;
1768 while (top
> bottom
)
1770 center
= bottom
+ (top
- bottom
) / 2;
1771 if (!(center
< top
))
1772 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1773 if (!do_linear_search
1774 && (SYMBOL_LANGUAGE (*center
) == language_java
))
1776 do_linear_search
= 1;
1778 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center
), name
) >= 0)
1784 bottom
= center
+ 1;
1787 if (!(top
== bottom
))
1788 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1790 while (top
<= real_top
1791 && (linkage_name
!= NULL
1792 ? strcmp (SYMBOL_LINKAGE_NAME (*top
), linkage_name
) == 0
1793 : SYMBOL_MATCHES_SEARCH_NAME (*top
,name
)))
1795 if (symbol_matches_domain (SYMBOL_LANGUAGE (*top
),
1796 SYMBOL_DOMAIN (*top
), domain
))
1802 /* Can't use a binary search or else we found during the binary search that
1803 we should also do a linear search. */
1805 if (do_linear_search
)
1807 for (psym
= start
; psym
< start
+ length
; psym
++)
1809 if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym
),
1810 SYMBOL_DOMAIN (*psym
), domain
))
1812 if (linkage_name
!= NULL
1813 ? strcmp (SYMBOL_LINKAGE_NAME (*psym
), linkage_name
) == 0
1814 : SYMBOL_MATCHES_SEARCH_NAME (*psym
, name
))
1825 /* Look up a type named NAME in the struct_domain. The type returned
1826 must not be opaque -- i.e., must have at least one field
1830 lookup_transparent_type (const char *name
)
1832 return current_language
->la_lookup_transparent_type (name
);
1835 /* The standard implementation of lookup_transparent_type. This code
1836 was modeled on lookup_symbol -- the parts not relevant to looking
1837 up types were just left out. In particular it's assumed here that
1838 types are available in struct_domain and only at file-static or
1842 basic_lookup_transparent_type (const char *name
)
1845 struct symtab
*s
= NULL
;
1846 struct partial_symtab
*ps
;
1847 struct blockvector
*bv
;
1848 struct objfile
*objfile
;
1849 struct block
*block
;
1851 /* Now search all the global symbols. Do the symtab's first, then
1852 check the psymtab's. If a psymtab indicates the existence
1853 of the desired name as a global, then do psymtab-to-symtab
1854 conversion on the fly and return the found symbol. */
1856 ALL_PRIMARY_SYMTABS (objfile
, s
)
1858 bv
= BLOCKVECTOR (s
);
1859 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1860 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1861 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1863 return SYMBOL_TYPE (sym
);
1867 ALL_PSYMTABS (objfile
, ps
)
1869 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
,
1872 s
= PSYMTAB_TO_SYMTAB (ps
);
1873 bv
= BLOCKVECTOR (s
);
1874 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1875 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1878 /* This shouldn't be necessary, but as a last resort
1879 * try looking in the statics even though the psymtab
1880 * claimed the symbol was global. It's possible that
1881 * the psymtab gets it wrong in some cases.
1883 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1884 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1886 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1887 %s may be an inlined function, or may be a template function\n\
1888 (if a template, try specifying an instantiation: %s<type>)."),
1889 name
, ps
->filename
, name
, name
);
1891 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1892 return SYMBOL_TYPE (sym
);
1896 /* Now search the static file-level symbols.
1897 Not strictly correct, but more useful than an error.
1898 Do the symtab's first, then
1899 check the psymtab's. If a psymtab indicates the existence
1900 of the desired name as a file-level static, then do psymtab-to-symtab
1901 conversion on the fly and return the found symbol.
1904 ALL_PRIMARY_SYMTABS (objfile
, s
)
1906 bv
= BLOCKVECTOR (s
);
1907 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1908 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1909 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1911 return SYMBOL_TYPE (sym
);
1915 ALL_PSYMTABS (objfile
, ps
)
1917 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
, 0, STRUCT_DOMAIN
))
1919 s
= PSYMTAB_TO_SYMTAB (ps
);
1920 bv
= BLOCKVECTOR (s
);
1921 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1922 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1925 /* This shouldn't be necessary, but as a last resort
1926 * try looking in the globals even though the psymtab
1927 * claimed the symbol was static. It's possible that
1928 * the psymtab gets it wrong in some cases.
1930 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1931 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1933 error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1934 %s may be an inlined function, or may be a template function\n\
1935 (if a template, try specifying an instantiation: %s<type>)."),
1936 name
, ps
->filename
, name
, name
);
1938 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1939 return SYMBOL_TYPE (sym
);
1942 return (struct type
*) 0;
1946 /* Find the psymtab containing main(). */
1947 /* FIXME: What about languages without main() or specially linked
1948 executables that have no main() ? */
1950 struct partial_symtab
*
1951 find_main_psymtab (void)
1953 struct partial_symtab
*pst
;
1954 struct objfile
*objfile
;
1956 ALL_PSYMTABS (objfile
, pst
)
1958 if (lookup_partial_symbol (pst
, main_name (), NULL
, 1, VAR_DOMAIN
))
1966 /* Search BLOCK for symbol NAME in DOMAIN.
1968 Note that if NAME is the demangled form of a C++ symbol, we will fail
1969 to find a match during the binary search of the non-encoded names, but
1970 for now we don't worry about the slight inefficiency of looking for
1971 a match we'll never find, since it will go pretty quick. Once the
1972 binary search terminates, we drop through and do a straight linear
1973 search on the symbols. Each symbol which is marked as being a ObjC/C++
1974 symbol (language_cplus or language_objc set) has both the encoded and
1975 non-encoded names tested for a match.
1977 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1978 particular mangled name.
1982 lookup_block_symbol (const struct block
*block
, const char *name
,
1983 const char *linkage_name
,
1984 const domain_enum domain
)
1986 struct dict_iterator iter
;
1989 if (!BLOCK_FUNCTION (block
))
1991 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1993 sym
= dict_iter_name_next (name
, &iter
))
1995 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1996 SYMBOL_DOMAIN (sym
), domain
)
1997 && (linkage_name
!= NULL
1998 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
2005 /* Note that parameter symbols do not always show up last in the
2006 list; this loop makes sure to take anything else other than
2007 parameter symbols first; it only uses parameter symbols as a
2008 last resort. Note that this only takes up extra computation
2011 struct symbol
*sym_found
= NULL
;
2013 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
2015 sym
= dict_iter_name_next (name
, &iter
))
2017 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2018 SYMBOL_DOMAIN (sym
), domain
)
2019 && (linkage_name
!= NULL
2020 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
2023 if (SYMBOL_CLASS (sym
) != LOC_ARG
&&
2024 SYMBOL_CLASS (sym
) != LOC_LOCAL_ARG
&&
2025 SYMBOL_CLASS (sym
) != LOC_REF_ARG
&&
2026 SYMBOL_CLASS (sym
) != LOC_REGPARM
&&
2027 SYMBOL_CLASS (sym
) != LOC_REGPARM_ADDR
&&
2028 SYMBOL_CLASS (sym
) != LOC_BASEREG_ARG
&&
2029 SYMBOL_CLASS (sym
) != LOC_COMPUTED_ARG
)
2035 return (sym_found
); /* Will be NULL if not found. */
2039 /* Find the symtab associated with PC and SECTION. Look through the
2040 psymtabs and read in another symtab if necessary. */
2043 find_pc_sect_symtab (CORE_ADDR pc
, asection
*section
)
2046 struct blockvector
*bv
;
2047 struct symtab
*s
= NULL
;
2048 struct symtab
*best_s
= NULL
;
2049 struct partial_symtab
*ps
;
2050 struct objfile
*objfile
;
2051 CORE_ADDR distance
= 0;
2052 struct minimal_symbol
*msymbol
;
2054 /* If we know that this is not a text address, return failure. This is
2055 necessary because we loop based on the block's high and low code
2056 addresses, which do not include the data ranges, and because
2057 we call find_pc_sect_psymtab which has a similar restriction based
2058 on the partial_symtab's texthigh and textlow. */
2059 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2061 && (msymbol
->type
== mst_data
2062 || msymbol
->type
== mst_bss
2063 || msymbol
->type
== mst_abs
2064 || msymbol
->type
== mst_file_data
2065 || msymbol
->type
== mst_file_bss
))
2068 /* Search all symtabs for the one whose file contains our address, and which
2069 is the smallest of all the ones containing the address. This is designed
2070 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2071 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2072 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2074 This happens for native ecoff format, where code from included files
2075 gets its own symtab. The symtab for the included file should have
2076 been read in already via the dependency mechanism.
2077 It might be swifter to create several symtabs with the same name
2078 like xcoff does (I'm not sure).
2080 It also happens for objfiles that have their functions reordered.
2081 For these, the symtab we are looking for is not necessarily read in. */
2083 ALL_PRIMARY_SYMTABS (objfile
, s
)
2085 bv
= BLOCKVECTOR (s
);
2086 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2088 if (BLOCK_START (b
) <= pc
2089 && BLOCK_END (b
) > pc
2091 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2093 /* For an objfile that has its functions reordered,
2094 find_pc_psymtab will find the proper partial symbol table
2095 and we simply return its corresponding symtab. */
2096 /* In order to better support objfiles that contain both
2097 stabs and coff debugging info, we continue on if a psymtab
2099 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->psymtabs
)
2101 ps
= find_pc_sect_psymtab (pc
, section
);
2103 return PSYMTAB_TO_SYMTAB (ps
);
2107 struct dict_iterator iter
;
2108 struct symbol
*sym
= NULL
;
2110 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2112 fixup_symbol_section (sym
, objfile
);
2113 if (matching_bfd_sections (SYMBOL_BFD_SECTION (sym
), section
))
2117 continue; /* no symbol in this symtab matches section */
2119 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2128 ps
= find_pc_sect_psymtab (pc
, section
);
2132 /* Might want to error() here (in case symtab is corrupt and
2133 will cause a core dump), but maybe we can successfully
2134 continue, so let's not. */
2136 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n"),
2138 s
= PSYMTAB_TO_SYMTAB (ps
);
2143 /* Find the symtab associated with PC. Look through the psymtabs and
2144 read in another symtab if necessary. Backward compatibility, no section */
2147 find_pc_symtab (CORE_ADDR pc
)
2149 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2153 /* Find the source file and line number for a given PC value and SECTION.
2154 Return a structure containing a symtab pointer, a line number,
2155 and a pc range for the entire source line.
2156 The value's .pc field is NOT the specified pc.
2157 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2158 use the line that ends there. Otherwise, in that case, the line
2159 that begins there is used. */
2161 /* The big complication here is that a line may start in one file, and end just
2162 before the start of another file. This usually occurs when you #include
2163 code in the middle of a subroutine. To properly find the end of a line's PC
2164 range, we must search all symtabs associated with this compilation unit, and
2165 find the one whose first PC is closer than that of the next line in this
2168 /* If it's worth the effort, we could be using a binary search. */
2170 struct symtab_and_line
2171 find_pc_sect_line (CORE_ADDR pc
, struct bfd_section
*section
, int notcurrent
)
2174 struct linetable
*l
;
2177 struct linetable_entry
*item
;
2178 struct symtab_and_line val
;
2179 struct blockvector
*bv
;
2180 struct minimal_symbol
*msymbol
;
2181 struct minimal_symbol
*mfunsym
;
2183 /* Info on best line seen so far, and where it starts, and its file. */
2185 struct linetable_entry
*best
= NULL
;
2186 CORE_ADDR best_end
= 0;
2187 struct symtab
*best_symtab
= 0;
2189 /* Store here the first line number
2190 of a file which contains the line at the smallest pc after PC.
2191 If we don't find a line whose range contains PC,
2192 we will use a line one less than this,
2193 with a range from the start of that file to the first line's pc. */
2194 struct linetable_entry
*alt
= NULL
;
2195 struct symtab
*alt_symtab
= 0;
2197 /* Info on best line seen in this file. */
2199 struct linetable_entry
*prev
;
2201 /* If this pc is not from the current frame,
2202 it is the address of the end of a call instruction.
2203 Quite likely that is the start of the following statement.
2204 But what we want is the statement containing the instruction.
2205 Fudge the pc to make sure we get that. */
2207 init_sal (&val
); /* initialize to zeroes */
2209 /* It's tempting to assume that, if we can't find debugging info for
2210 any function enclosing PC, that we shouldn't search for line
2211 number info, either. However, GAS can emit line number info for
2212 assembly files --- very helpful when debugging hand-written
2213 assembly code. In such a case, we'd have no debug info for the
2214 function, but we would have line info. */
2219 /* elz: added this because this function returned the wrong
2220 information if the pc belongs to a stub (import/export)
2221 to call a shlib function. This stub would be anywhere between
2222 two functions in the target, and the line info was erroneously
2223 taken to be the one of the line before the pc.
2225 /* RT: Further explanation:
2227 * We have stubs (trampolines) inserted between procedures.
2229 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2230 * exists in the main image.
2232 * In the minimal symbol table, we have a bunch of symbols
2233 * sorted by start address. The stubs are marked as "trampoline",
2234 * the others appear as text. E.g.:
2236 * Minimal symbol table for main image
2237 * main: code for main (text symbol)
2238 * shr1: stub (trampoline symbol)
2239 * foo: code for foo (text symbol)
2241 * Minimal symbol table for "shr1" image:
2243 * shr1: code for shr1 (text symbol)
2246 * So the code below is trying to detect if we are in the stub
2247 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2248 * and if found, do the symbolization from the real-code address
2249 * rather than the stub address.
2251 * Assumptions being made about the minimal symbol table:
2252 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2253 * if we're really in the trampoline. If we're beyond it (say
2254 * we're in "foo" in the above example), it'll have a closer
2255 * symbol (the "foo" text symbol for example) and will not
2256 * return the trampoline.
2257 * 2. lookup_minimal_symbol_text() will find a real text symbol
2258 * corresponding to the trampoline, and whose address will
2259 * be different than the trampoline address. I put in a sanity
2260 * check for the address being the same, to avoid an
2261 * infinite recursion.
2263 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2264 if (msymbol
!= NULL
)
2265 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2267 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2269 if (mfunsym
== NULL
)
2270 /* I eliminated this warning since it is coming out
2271 * in the following situation:
2272 * gdb shmain // test program with shared libraries
2273 * (gdb) break shr1 // function in shared lib
2274 * Warning: In stub for ...
2275 * In the above situation, the shared lib is not loaded yet,
2276 * so of course we can't find the real func/line info,
2277 * but the "break" still works, and the warning is annoying.
2278 * So I commented out the warning. RT */
2279 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2281 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
2282 /* Avoid infinite recursion */
2283 /* See above comment about why warning is commented out */
2284 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2287 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2291 s
= find_pc_sect_symtab (pc
, section
);
2294 /* if no symbol information, return previous pc */
2301 bv
= BLOCKVECTOR (s
);
2303 /* Look at all the symtabs that share this blockvector.
2304 They all have the same apriori range, that we found was right;
2305 but they have different line tables. */
2307 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2309 /* Find the best line in this symtab. */
2316 /* I think len can be zero if the symtab lacks line numbers
2317 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2318 I'm not sure which, and maybe it depends on the symbol
2324 item
= l
->item
; /* Get first line info */
2326 /* Is this file's first line closer than the first lines of other files?
2327 If so, record this file, and its first line, as best alternate. */
2328 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2334 for (i
= 0; i
< len
; i
++, item
++)
2336 /* Leave prev pointing to the linetable entry for the last line
2337 that started at or before PC. */
2344 /* At this point, prev points at the line whose start addr is <= pc, and
2345 item points at the next line. If we ran off the end of the linetable
2346 (pc >= start of the last line), then prev == item. If pc < start of
2347 the first line, prev will not be set. */
2349 /* Is this file's best line closer than the best in the other files?
2350 If so, record this file, and its best line, as best so far. Don't
2351 save prev if it represents the end of a function (i.e. line number
2352 0) instead of a real line. */
2354 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2359 /* Discard BEST_END if it's before the PC of the current BEST. */
2360 if (best_end
<= best
->pc
)
2364 /* If another line (denoted by ITEM) is in the linetable and its
2365 PC is after BEST's PC, but before the current BEST_END, then
2366 use ITEM's PC as the new best_end. */
2367 if (best
&& i
< len
&& item
->pc
> best
->pc
2368 && (best_end
== 0 || best_end
> item
->pc
))
2369 best_end
= item
->pc
;
2374 /* If we didn't find any line number info, just return zeros.
2375 We used to return alt->line - 1 here, but that could be
2376 anywhere; if we don't have line number info for this PC,
2377 don't make some up. */
2380 else if (best
->line
== 0)
2382 /* If our best fit is in a range of PC's for which no line
2383 number info is available (line number is zero) then we didn't
2384 find any valid line information. */
2389 val
.symtab
= best_symtab
;
2390 val
.line
= best
->line
;
2392 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2397 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2399 val
.section
= section
;
2403 /* Backward compatibility (no section) */
2405 struct symtab_and_line
2406 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2410 section
= find_pc_overlay (pc
);
2411 if (pc_in_unmapped_range (pc
, section
))
2412 pc
= overlay_mapped_address (pc
, section
);
2413 return find_pc_sect_line (pc
, section
, notcurrent
);
2416 /* Find line number LINE in any symtab whose name is the same as
2419 If found, return the symtab that contains the linetable in which it was
2420 found, set *INDEX to the index in the linetable of the best entry
2421 found, and set *EXACT_MATCH nonzero if the value returned is an
2424 If not found, return NULL. */
2427 find_line_symtab (struct symtab
*symtab
, int line
, int *index
, int *exact_match
)
2431 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2435 struct linetable
*best_linetable
;
2436 struct symtab
*best_symtab
;
2438 /* First try looking it up in the given symtab. */
2439 best_linetable
= LINETABLE (symtab
);
2440 best_symtab
= symtab
;
2441 best_index
= find_line_common (best_linetable
, line
, &exact
);
2442 if (best_index
< 0 || !exact
)
2444 /* Didn't find an exact match. So we better keep looking for
2445 another symtab with the same name. In the case of xcoff,
2446 multiple csects for one source file (produced by IBM's FORTRAN
2447 compiler) produce multiple symtabs (this is unavoidable
2448 assuming csects can be at arbitrary places in memory and that
2449 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2451 /* BEST is the smallest linenumber > LINE so far seen,
2452 or 0 if none has been seen so far.
2453 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2456 struct objfile
*objfile
;
2458 struct partial_symtab
*p
;
2460 if (best_index
>= 0)
2461 best
= best_linetable
->item
[best_index
].line
;
2465 ALL_PSYMTABS (objfile
, p
)
2467 if (strcmp (symtab
->filename
, p
->filename
) != 0)
2469 PSYMTAB_TO_SYMTAB (p
);
2472 ALL_SYMTABS (objfile
, s
)
2474 struct linetable
*l
;
2477 if (strcmp (symtab
->filename
, s
->filename
) != 0)
2480 ind
= find_line_common (l
, line
, &exact
);
2490 if (best
== 0 || l
->item
[ind
].line
< best
)
2492 best
= l
->item
[ind
].line
;
2505 *index
= best_index
;
2507 *exact_match
= exact
;
2512 /* Set the PC value for a given source file and line number and return true.
2513 Returns zero for invalid line number (and sets the PC to 0).
2514 The source file is specified with a struct symtab. */
2517 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2519 struct linetable
*l
;
2526 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2529 l
= LINETABLE (symtab
);
2530 *pc
= l
->item
[ind
].pc
;
2537 /* Find the range of pc values in a line.
2538 Store the starting pc of the line into *STARTPTR
2539 and the ending pc (start of next line) into *ENDPTR.
2540 Returns 1 to indicate success.
2541 Returns 0 if could not find the specified line. */
2544 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2547 CORE_ADDR startaddr
;
2548 struct symtab_and_line found_sal
;
2551 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2554 /* This whole function is based on address. For example, if line 10 has
2555 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2556 "info line *0x123" should say the line goes from 0x100 to 0x200
2557 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2558 This also insures that we never give a range like "starts at 0x134
2559 and ends at 0x12c". */
2561 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2562 if (found_sal
.line
!= sal
.line
)
2564 /* The specified line (sal) has zero bytes. */
2565 *startptr
= found_sal
.pc
;
2566 *endptr
= found_sal
.pc
;
2570 *startptr
= found_sal
.pc
;
2571 *endptr
= found_sal
.end
;
2576 /* Given a line table and a line number, return the index into the line
2577 table for the pc of the nearest line whose number is >= the specified one.
2578 Return -1 if none is found. The value is >= 0 if it is an index.
2580 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2583 find_line_common (struct linetable
*l
, int lineno
,
2589 /* BEST is the smallest linenumber > LINENO so far seen,
2590 or 0 if none has been seen so far.
2591 BEST_INDEX identifies the item for it. */
2593 int best_index
= -1;
2604 for (i
= 0; i
< len
; i
++)
2606 struct linetable_entry
*item
= &(l
->item
[i
]);
2608 if (item
->line
== lineno
)
2610 /* Return the first (lowest address) entry which matches. */
2615 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2622 /* If we got here, we didn't get an exact match. */
2627 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2629 struct symtab_and_line sal
;
2630 sal
= find_pc_line (pc
, 0);
2633 return sal
.symtab
!= 0;
2636 /* Given a function start address PC and SECTION, find the first
2637 address after the function prologue. */
2639 find_function_start_pc (struct gdbarch
*gdbarch
,
2640 CORE_ADDR pc
, asection
*section
)
2642 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2643 so that gdbarch_skip_prologue has something unique to work on. */
2644 if (section_is_overlay (section
) && !section_is_mapped (section
))
2645 pc
= overlay_unmapped_address (pc
, section
);
2647 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2648 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2650 /* For overlays, map pc back into its mapped VMA range. */
2651 pc
= overlay_mapped_address (pc
, section
);
2656 /* Given a function symbol SYM, find the symtab and line for the start
2658 If the argument FUNFIRSTLINE is nonzero, we want the first line
2659 of real code inside the function. */
2661 struct symtab_and_line
2662 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2664 struct block
*block
= SYMBOL_BLOCK_VALUE (sym
);
2665 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2666 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2669 struct symtab_and_line sal
;
2671 pc
= BLOCK_START (block
);
2672 fixup_symbol_section (sym
, objfile
);
2675 /* Skip "first line" of function (which is actually its prologue). */
2676 pc
= find_function_start_pc (gdbarch
, pc
, SYMBOL_BFD_SECTION (sym
));
2678 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2680 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2681 line is still part of the same function. */
2683 && BLOCK_START (block
) <= sal
.end
2684 && sal
.end
< BLOCK_END (block
))
2686 /* First pc of next line */
2688 /* Recalculate the line number (might not be N+1). */
2689 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2696 /* If P is of the form "operator[ \t]+..." where `...' is
2697 some legitimate operator text, return a pointer to the
2698 beginning of the substring of the operator text.
2699 Otherwise, return "". */
2701 operator_chars (char *p
, char **end
)
2704 if (strncmp (p
, "operator", 8))
2708 /* Don't get faked out by `operator' being part of a longer
2710 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2713 /* Allow some whitespace between `operator' and the operator symbol. */
2714 while (*p
== ' ' || *p
== '\t')
2717 /* Recognize 'operator TYPENAME'. */
2719 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2722 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2731 case '\\': /* regexp quoting */
2734 if (p
[2] == '=') /* 'operator\*=' */
2736 else /* 'operator\*' */
2740 else if (p
[1] == '[')
2743 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2744 else if (p
[2] == '\\' && p
[3] == ']')
2746 *end
= p
+ 4; /* 'operator\[\]' */
2750 error (_("nothing is allowed between '[' and ']'"));
2754 /* Gratuitous qoute: skip it and move on. */
2776 if (p
[0] == '-' && p
[1] == '>')
2778 /* Struct pointer member operator 'operator->'. */
2781 *end
= p
+ 3; /* 'operator->*' */
2784 else if (p
[2] == '\\')
2786 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2791 *end
= p
+ 2; /* 'operator->' */
2795 if (p
[1] == '=' || p
[1] == p
[0])
2806 error (_("`operator ()' must be specified without whitespace in `()'"));
2811 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2816 error (_("`operator []' must be specified without whitespace in `[]'"));
2820 error (_("`operator %s' not supported"), p
);
2829 /* If FILE is not already in the table of files, return zero;
2830 otherwise return non-zero. Optionally add FILE to the table if ADD
2831 is non-zero. If *FIRST is non-zero, forget the old table
2834 filename_seen (const char *file
, int add
, int *first
)
2836 /* Table of files seen so far. */
2837 static const char **tab
= NULL
;
2838 /* Allocated size of tab in elements.
2839 Start with one 256-byte block (when using GNU malloc.c).
2840 24 is the malloc overhead when range checking is in effect. */
2841 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2842 /* Current size of tab in elements. */
2843 static int tab_cur_size
;
2849 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2853 /* Is FILE in tab? */
2854 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2855 if (strcmp (*p
, file
) == 0)
2858 /* No; maybe add it to tab. */
2861 if (tab_cur_size
== tab_alloc_size
)
2863 tab_alloc_size
*= 2;
2864 tab
= (const char **) xrealloc ((char *) tab
,
2865 tab_alloc_size
* sizeof (*tab
));
2867 tab
[tab_cur_size
++] = file
;
2873 /* Slave routine for sources_info. Force line breaks at ,'s.
2874 NAME is the name to print and *FIRST is nonzero if this is the first
2875 name printed. Set *FIRST to zero. */
2877 output_source_filename (const char *name
, int *first
)
2879 /* Since a single source file can result in several partial symbol
2880 tables, we need to avoid printing it more than once. Note: if
2881 some of the psymtabs are read in and some are not, it gets
2882 printed both under "Source files for which symbols have been
2883 read" and "Source files for which symbols will be read in on
2884 demand". I consider this a reasonable way to deal with the
2885 situation. I'm not sure whether this can also happen for
2886 symtabs; it doesn't hurt to check. */
2888 /* Was NAME already seen? */
2889 if (filename_seen (name
, 1, first
))
2891 /* Yes; don't print it again. */
2894 /* No; print it and reset *FIRST. */
2901 printf_filtered (", ");
2905 fputs_filtered (name
, gdb_stdout
);
2909 sources_info (char *ignore
, int from_tty
)
2912 struct partial_symtab
*ps
;
2913 struct objfile
*objfile
;
2916 if (!have_full_symbols () && !have_partial_symbols ())
2918 error (_("No symbol table is loaded. Use the \"file\" command."));
2921 printf_filtered ("Source files for which symbols have been read in:\n\n");
2924 ALL_SYMTABS (objfile
, s
)
2926 const char *fullname
= symtab_to_fullname (s
);
2927 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2929 printf_filtered ("\n\n");
2931 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2934 ALL_PSYMTABS (objfile
, ps
)
2938 const char *fullname
= psymtab_to_fullname (ps
);
2939 output_source_filename (fullname
? fullname
: ps
->filename
, &first
);
2942 printf_filtered ("\n");
2946 file_matches (char *file
, char *files
[], int nfiles
)
2950 if (file
!= NULL
&& nfiles
!= 0)
2952 for (i
= 0; i
< nfiles
; i
++)
2954 if (strcmp (files
[i
], lbasename (file
)) == 0)
2958 else if (nfiles
== 0)
2963 /* Free any memory associated with a search. */
2965 free_search_symbols (struct symbol_search
*symbols
)
2967 struct symbol_search
*p
;
2968 struct symbol_search
*next
;
2970 for (p
= symbols
; p
!= NULL
; p
= next
)
2978 do_free_search_symbols_cleanup (void *symbols
)
2980 free_search_symbols (symbols
);
2984 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2986 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2989 /* Helper function for sort_search_symbols and qsort. Can only
2990 sort symbols, not minimal symbols. */
2992 compare_search_syms (const void *sa
, const void *sb
)
2994 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2995 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2997 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2998 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3001 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3002 prevtail where it is, but update its next pointer to point to
3003 the first of the sorted symbols. */
3004 static struct symbol_search
*
3005 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3007 struct symbol_search
**symbols
, *symp
, *old_next
;
3010 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3012 symp
= prevtail
->next
;
3013 for (i
= 0; i
< nfound
; i
++)
3018 /* Generally NULL. */
3021 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3022 compare_search_syms
);
3025 for (i
= 0; i
< nfound
; i
++)
3027 symp
->next
= symbols
[i
];
3030 symp
->next
= old_next
;
3036 /* Search the symbol table for matches to the regular expression REGEXP,
3037 returning the results in *MATCHES.
3039 Only symbols of KIND are searched:
3040 FUNCTIONS_DOMAIN - search all functions
3041 TYPES_DOMAIN - search all type names
3042 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
3043 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3044 and constants (enums)
3046 free_search_symbols should be called when *MATCHES is no longer needed.
3048 The results are sorted locally; each symtab's global and static blocks are
3049 separately alphabetized.
3052 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
3053 struct symbol_search
**matches
)
3056 struct partial_symtab
*ps
;
3057 struct blockvector
*bv
;
3060 struct dict_iterator iter
;
3062 struct partial_symbol
**psym
;
3063 struct objfile
*objfile
;
3064 struct minimal_symbol
*msymbol
;
3067 static enum minimal_symbol_type types
[]
3069 {mst_data
, mst_text
, mst_abs
, mst_unknown
};
3070 static enum minimal_symbol_type types2
[]
3072 {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
3073 static enum minimal_symbol_type types3
[]
3075 {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
3076 static enum minimal_symbol_type types4
[]
3078 {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
3079 enum minimal_symbol_type ourtype
;
3080 enum minimal_symbol_type ourtype2
;
3081 enum minimal_symbol_type ourtype3
;
3082 enum minimal_symbol_type ourtype4
;
3083 struct symbol_search
*sr
;
3084 struct symbol_search
*psr
;
3085 struct symbol_search
*tail
;
3086 struct cleanup
*old_chain
= NULL
;
3088 if (kind
< VARIABLES_DOMAIN
)
3089 error (_("must search on specific domain"));
3091 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3092 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3093 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3094 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3096 sr
= *matches
= NULL
;
3101 /* Make sure spacing is right for C++ operators.
3102 This is just a courtesy to make the matching less sensitive
3103 to how many spaces the user leaves between 'operator'
3104 and <TYPENAME> or <OPERATOR>. */
3106 char *opname
= operator_chars (regexp
, &opend
);
3109 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
3110 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3112 /* There should 1 space between 'operator' and 'TYPENAME'. */
3113 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3118 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3119 if (opname
[-1] == ' ')
3122 /* If wrong number of spaces, fix it. */
3125 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3126 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3131 if (0 != (val
= re_comp (regexp
)))
3132 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3135 /* Search through the partial symtabs *first* for all symbols
3136 matching the regexp. That way we don't have to reproduce all of
3137 the machinery below. */
3139 ALL_PSYMTABS (objfile
, ps
)
3141 struct partial_symbol
**bound
, **gbound
, **sbound
;
3147 gbound
= objfile
->global_psymbols
.list
+ ps
->globals_offset
+ ps
->n_global_syms
;
3148 sbound
= objfile
->static_psymbols
.list
+ ps
->statics_offset
+ ps
->n_static_syms
;
3151 /* Go through all of the symbols stored in a partial
3152 symtab in one loop. */
3153 psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3158 if (bound
== gbound
&& ps
->n_static_syms
!= 0)
3160 psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3171 /* If it would match (logic taken from loop below)
3172 load the file and go on to the next one. We check the
3173 filename here, but that's a bit bogus: we don't know
3174 what file it really comes from until we have full
3175 symtabs. The symbol might be in a header file included by
3176 this psymtab. This only affects Insight. */
3177 if (file_matches (ps
->filename
, files
, nfiles
)
3179 || re_exec (SYMBOL_NATURAL_NAME (*psym
)) != 0)
3180 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (*psym
) != LOC_TYPEDEF
3181 && SYMBOL_CLASS (*psym
) != LOC_BLOCK
)
3182 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
)
3183 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_TYPEDEF
)
3184 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
))))
3186 PSYMTAB_TO_SYMTAB (ps
);
3194 /* Here, we search through the minimal symbol tables for functions
3195 and variables that match, and force their symbols to be read.
3196 This is in particular necessary for demangled variable names,
3197 which are no longer put into the partial symbol tables.
3198 The symbol will then be found during the scan of symtabs below.
3200 For functions, find_pc_symtab should succeed if we have debug info
3201 for the function, for variables we have to call lookup_symbol
3202 to determine if the variable has debug info.
3203 If the lookup fails, set found_misc so that we will rescan to print
3204 any matching symbols without debug info.
3207 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3209 ALL_MSYMBOLS (objfile
, msymbol
)
3211 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3212 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3213 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3214 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3217 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3219 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3221 /* FIXME: carlton/2003-02-04: Given that the
3222 semantics of lookup_symbol keeps on changing
3223 slightly, it would be a nice idea if we had a
3224 function lookup_symbol_minsym that found the
3225 symbol associated to a given minimal symbol (if
3227 if (kind
== FUNCTIONS_DOMAIN
3228 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3229 (struct block
*) NULL
,
3231 0, (struct symtab
**) NULL
)
3240 ALL_PRIMARY_SYMTABS (objfile
, s
)
3242 bv
= BLOCKVECTOR (s
);
3243 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3245 struct symbol_search
*prevtail
= tail
;
3247 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3248 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3250 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3253 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3255 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3256 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3257 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3258 && SYMBOL_CLASS (sym
) != LOC_CONST
)
3259 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3260 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3261 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
))))
3264 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3266 psr
->symtab
= real_symtab
;
3268 psr
->msymbol
= NULL
;
3280 if (prevtail
== NULL
)
3282 struct symbol_search dummy
;
3285 tail
= sort_search_symbols (&dummy
, nfound
);
3288 old_chain
= make_cleanup_free_search_symbols (sr
);
3291 tail
= sort_search_symbols (prevtail
, nfound
);
3296 /* If there are no eyes, avoid all contact. I mean, if there are
3297 no debug symbols, then print directly from the msymbol_vector. */
3299 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3301 ALL_MSYMBOLS (objfile
, msymbol
)
3303 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3304 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3305 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3306 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3309 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3311 /* Functions: Look up by address. */
3312 if (kind
!= FUNCTIONS_DOMAIN
||
3313 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3315 /* Variables/Absolutes: Look up by name */
3316 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3317 (struct block
*) NULL
, VAR_DOMAIN
,
3318 0, (struct symtab
**) NULL
) == NULL
)
3321 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3323 psr
->msymbol
= msymbol
;
3330 old_chain
= make_cleanup_free_search_symbols (sr
);
3344 discard_cleanups (old_chain
);
3347 /* Helper function for symtab_symbol_info, this function uses
3348 the data returned from search_symbols() to print information
3349 regarding the match to gdb_stdout.
3352 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3353 int block
, char *last
)
3355 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3357 fputs_filtered ("\nFile ", gdb_stdout
);
3358 fputs_filtered (s
->filename
, gdb_stdout
);
3359 fputs_filtered (":\n", gdb_stdout
);
3362 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3363 printf_filtered ("static ");
3365 /* Typedef that is not a C++ class */
3366 if (kind
== TYPES_DOMAIN
3367 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3368 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3369 /* variable, func, or typedef-that-is-c++-class */
3370 else if (kind
< TYPES_DOMAIN
||
3371 (kind
== TYPES_DOMAIN
&&
3372 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3374 type_print (SYMBOL_TYPE (sym
),
3375 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3376 ? "" : SYMBOL_PRINT_NAME (sym
)),
3379 printf_filtered (";\n");
3383 /* This help function for symtab_symbol_info() prints information
3384 for non-debugging symbols to gdb_stdout.
3387 print_msymbol_info (struct minimal_symbol
*msymbol
)
3391 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3392 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3393 & (CORE_ADDR
) 0xffffffff,
3396 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3398 printf_filtered ("%s %s\n",
3399 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3402 /* This is the guts of the commands "info functions", "info types", and
3403 "info variables". It calls search_symbols to find all matches and then
3404 print_[m]symbol_info to print out some useful information about the
3408 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3410 static char *classnames
[]
3412 {"variable", "function", "type", "method"};
3413 struct symbol_search
*symbols
;
3414 struct symbol_search
*p
;
3415 struct cleanup
*old_chain
;
3416 char *last_filename
= NULL
;
3419 /* must make sure that if we're interrupted, symbols gets freed */
3420 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3421 old_chain
= make_cleanup_free_search_symbols (symbols
);
3423 printf_filtered (regexp
3424 ? "All %ss matching regular expression \"%s\":\n"
3425 : "All defined %ss:\n",
3426 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3428 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3432 if (p
->msymbol
!= NULL
)
3436 printf_filtered ("\nNon-debugging symbols:\n");
3439 print_msymbol_info (p
->msymbol
);
3443 print_symbol_info (kind
,
3448 last_filename
= p
->symtab
->filename
;
3452 do_cleanups (old_chain
);
3456 variables_info (char *regexp
, int from_tty
)
3458 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3462 functions_info (char *regexp
, int from_tty
)
3464 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3469 types_info (char *regexp
, int from_tty
)
3471 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3474 /* Breakpoint all functions matching regular expression. */
3477 rbreak_command_wrapper (char *regexp
, int from_tty
)
3479 rbreak_command (regexp
, from_tty
);
3483 rbreak_command (char *regexp
, int from_tty
)
3485 struct symbol_search
*ss
;
3486 struct symbol_search
*p
;
3487 struct cleanup
*old_chain
;
3489 search_symbols (regexp
, FUNCTIONS_DOMAIN
, 0, (char **) NULL
, &ss
);
3490 old_chain
= make_cleanup_free_search_symbols (ss
);
3492 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3494 if (p
->msymbol
== NULL
)
3496 char *string
= alloca (strlen (p
->symtab
->filename
)
3497 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3499 strcpy (string
, p
->symtab
->filename
);
3500 strcat (string
, ":'");
3501 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3502 strcat (string
, "'");
3503 break_command (string
, from_tty
);
3504 print_symbol_info (FUNCTIONS_DOMAIN
,
3508 p
->symtab
->filename
);
3512 char *string
= alloca (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
))
3514 strcpy (string
, "'");
3515 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3516 strcat (string
, "'");
3518 break_command (string
, from_tty
);
3519 printf_filtered ("<function, no debug info> %s;\n",
3520 SYMBOL_PRINT_NAME (p
->msymbol
));
3524 do_cleanups (old_chain
);
3528 /* Helper routine for make_symbol_completion_list. */
3530 static int return_val_size
;
3531 static int return_val_index
;
3532 static char **return_val
;
3534 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3535 completion_list_add_name \
3536 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3538 /* Test to see if the symbol specified by SYMNAME (which is already
3539 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3540 characters. If so, add it to the current completion list. */
3543 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3544 char *text
, char *word
)
3549 /* clip symbols that cannot match */
3551 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3556 /* We have a match for a completion, so add SYMNAME to the current list
3557 of matches. Note that the name is moved to freshly malloc'd space. */
3561 if (word
== sym_text
)
3563 new = xmalloc (strlen (symname
) + 5);
3564 strcpy (new, symname
);
3566 else if (word
> sym_text
)
3568 /* Return some portion of symname. */
3569 new = xmalloc (strlen (symname
) + 5);
3570 strcpy (new, symname
+ (word
- sym_text
));
3574 /* Return some of SYM_TEXT plus symname. */
3575 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3576 strncpy (new, word
, sym_text
- word
);
3577 new[sym_text
- word
] = '\0';
3578 strcat (new, symname
);
3581 if (return_val_index
+ 3 > return_val_size
)
3583 newsize
= (return_val_size
*= 2) * sizeof (char *);
3584 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3586 return_val
[return_val_index
++] = new;
3587 return_val
[return_val_index
] = NULL
;
3591 /* ObjC: In case we are completing on a selector, look as the msymbol
3592 again and feed all the selectors into the mill. */
3595 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3596 int sym_text_len
, char *text
, char *word
)
3598 static char *tmp
= NULL
;
3599 static unsigned int tmplen
= 0;
3601 char *method
, *category
, *selector
;
3604 method
= SYMBOL_NATURAL_NAME (msymbol
);
3606 /* Is it a method? */
3607 if ((method
[0] != '-') && (method
[0] != '+'))
3610 if (sym_text
[0] == '[')
3611 /* Complete on shortened method method. */
3612 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3614 while ((strlen (method
) + 1) >= tmplen
)
3620 tmp
= xrealloc (tmp
, tmplen
);
3622 selector
= strchr (method
, ' ');
3623 if (selector
!= NULL
)
3626 category
= strchr (method
, '(');
3628 if ((category
!= NULL
) && (selector
!= NULL
))
3630 memcpy (tmp
, method
, (category
- method
));
3631 tmp
[category
- method
] = ' ';
3632 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3633 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3634 if (sym_text
[0] == '[')
3635 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3638 if (selector
!= NULL
)
3640 /* Complete on selector only. */
3641 strcpy (tmp
, selector
);
3642 tmp2
= strchr (tmp
, ']');
3646 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3650 /* Break the non-quoted text based on the characters which are in
3651 symbols. FIXME: This should probably be language-specific. */
3654 language_search_unquoted_string (char *text
, char *p
)
3656 for (; p
> text
; --p
)
3658 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3662 if ((current_language
->la_language
== language_objc
))
3664 if (p
[-1] == ':') /* might be part of a method name */
3666 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3667 p
-= 2; /* beginning of a method name */
3668 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3669 { /* might be part of a method name */
3672 /* Seeing a ' ' or a '(' is not conclusive evidence
3673 that we are in the middle of a method name. However,
3674 finding "-[" or "+[" should be pretty un-ambiguous.
3675 Unfortunately we have to find it now to decide. */
3678 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3679 t
[-1] == ' ' || t
[-1] == ':' ||
3680 t
[-1] == '(' || t
[-1] == ')')
3685 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3686 p
= t
- 2; /* method name detected */
3687 /* else we leave with p unchanged */
3697 default_make_symbol_completion_list (char *text
, char *word
)
3699 /* Problem: All of the symbols have to be copied because readline
3700 frees them. I'm not going to worry about this; hopefully there
3701 won't be that many. */
3705 struct partial_symtab
*ps
;
3706 struct minimal_symbol
*msymbol
;
3707 struct objfile
*objfile
;
3708 struct block
*b
, *surrounding_static_block
= 0;
3709 struct dict_iterator iter
;
3711 struct partial_symbol
**psym
;
3712 /* The symbol we are completing on. Points in same buffer as text. */
3714 /* Length of sym_text. */
3717 /* Now look for the symbol we are supposed to complete on. */
3721 char *quote_pos
= NULL
;
3723 /* First see if this is a quoted string. */
3725 for (p
= text
; *p
!= '\0'; ++p
)
3727 if (quote_found
!= '\0')
3729 if (*p
== quote_found
)
3730 /* Found close quote. */
3732 else if (*p
== '\\' && p
[1] == quote_found
)
3733 /* A backslash followed by the quote character
3734 doesn't end the string. */
3737 else if (*p
== '\'' || *p
== '"')
3743 if (quote_found
== '\'')
3744 /* A string within single quotes can be a symbol, so complete on it. */
3745 sym_text
= quote_pos
+ 1;
3746 else if (quote_found
== '"')
3747 /* A double-quoted string is never a symbol, nor does it make sense
3748 to complete it any other way. */
3750 return_val
= (char **) xmalloc (sizeof (char *));
3751 return_val
[0] = NULL
;
3756 /* It is not a quoted string. Break it based on the characters
3757 which are in symbols. */
3760 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3769 sym_text_len
= strlen (sym_text
);
3771 return_val_size
= 100;
3772 return_val_index
= 0;
3773 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3774 return_val
[0] = NULL
;
3776 /* Look through the partial symtabs for all symbols which begin
3777 by matching SYM_TEXT. Add each one that you find to the list. */
3779 ALL_PSYMTABS (objfile
, ps
)
3781 /* If the psymtab's been read in we'll get it when we search
3782 through the blockvector. */
3786 for (psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3787 psym
< (objfile
->global_psymbols
.list
+ ps
->globals_offset
3788 + ps
->n_global_syms
);
3791 /* If interrupted, then quit. */
3793 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3796 for (psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3797 psym
< (objfile
->static_psymbols
.list
+ ps
->statics_offset
3798 + ps
->n_static_syms
);
3802 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3806 /* At this point scan through the misc symbol vectors and add each
3807 symbol you find to the list. Eventually we want to ignore
3808 anything that isn't a text symbol (everything else will be
3809 handled by the psymtab code above). */
3811 ALL_MSYMBOLS (objfile
, msymbol
)
3814 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3816 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3819 /* Search upwards from currently selected frame (so that we can
3820 complete on local vars. */
3822 for (b
= get_selected_block (0); b
!= NULL
; b
= BLOCK_SUPERBLOCK (b
))
3824 if (!BLOCK_SUPERBLOCK (b
))
3826 surrounding_static_block
= b
; /* For elmin of dups */
3829 /* Also catch fields of types defined in this places which match our
3830 text string. Only complete on types visible from current context. */
3832 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3835 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3836 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3838 struct type
*t
= SYMBOL_TYPE (sym
);
3839 enum type_code c
= TYPE_CODE (t
);
3841 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3843 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3845 if (TYPE_FIELD_NAME (t
, j
))
3847 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3848 sym_text
, sym_text_len
, text
, word
);
3856 /* Go through the symtabs and check the externs and statics for
3857 symbols which match. */
3859 ALL_PRIMARY_SYMTABS (objfile
, s
)
3862 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3863 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3865 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3869 ALL_PRIMARY_SYMTABS (objfile
, s
)
3872 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3873 /* Don't do this block twice. */
3874 if (b
== surrounding_static_block
)
3876 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3878 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3882 return (return_val
);
3885 /* Return a NULL terminated array of all symbols (regardless of class)
3886 which begin by matching TEXT. If the answer is no symbols, then
3887 the return value is an array which contains only a NULL pointer. */
3890 make_symbol_completion_list (char *text
, char *word
)
3892 return current_language
->la_make_symbol_completion_list (text
, word
);
3895 /* Like make_symbol_completion_list, but returns a list of symbols
3896 defined in a source file FILE. */
3899 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3904 struct dict_iterator iter
;
3905 /* The symbol we are completing on. Points in same buffer as text. */
3907 /* Length of sym_text. */
3910 /* Now look for the symbol we are supposed to complete on.
3911 FIXME: This should be language-specific. */
3915 char *quote_pos
= NULL
;
3917 /* First see if this is a quoted string. */
3919 for (p
= text
; *p
!= '\0'; ++p
)
3921 if (quote_found
!= '\0')
3923 if (*p
== quote_found
)
3924 /* Found close quote. */
3926 else if (*p
== '\\' && p
[1] == quote_found
)
3927 /* A backslash followed by the quote character
3928 doesn't end the string. */
3931 else if (*p
== '\'' || *p
== '"')
3937 if (quote_found
== '\'')
3938 /* A string within single quotes can be a symbol, so complete on it. */
3939 sym_text
= quote_pos
+ 1;
3940 else if (quote_found
== '"')
3941 /* A double-quoted string is never a symbol, nor does it make sense
3942 to complete it any other way. */
3944 return_val
= (char **) xmalloc (sizeof (char *));
3945 return_val
[0] = NULL
;
3950 /* Not a quoted string. */
3951 sym_text
= language_search_unquoted_string (text
, p
);
3955 sym_text_len
= strlen (sym_text
);
3957 return_val_size
= 10;
3958 return_val_index
= 0;
3959 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3960 return_val
[0] = NULL
;
3962 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3964 s
= lookup_symtab (srcfile
);
3967 /* Maybe they typed the file with leading directories, while the
3968 symbol tables record only its basename. */
3969 const char *tail
= lbasename (srcfile
);
3972 s
= lookup_symtab (tail
);
3975 /* If we have no symtab for that file, return an empty list. */
3977 return (return_val
);
3979 /* Go through this symtab and check the externs and statics for
3980 symbols which match. */
3982 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3983 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3985 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3988 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3989 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3991 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3994 return (return_val
);
3997 /* A helper function for make_source_files_completion_list. It adds
3998 another file name to a list of possible completions, growing the
3999 list as necessary. */
4002 add_filename_to_list (const char *fname
, char *text
, char *word
,
4003 char ***list
, int *list_used
, int *list_alloced
)
4006 size_t fnlen
= strlen (fname
);
4008 if (*list_used
+ 1 >= *list_alloced
)
4011 *list
= (char **) xrealloc ((char *) *list
,
4012 *list_alloced
* sizeof (char *));
4017 /* Return exactly fname. */
4018 new = xmalloc (fnlen
+ 5);
4019 strcpy (new, fname
);
4021 else if (word
> text
)
4023 /* Return some portion of fname. */
4024 new = xmalloc (fnlen
+ 5);
4025 strcpy (new, fname
+ (word
- text
));
4029 /* Return some of TEXT plus fname. */
4030 new = xmalloc (fnlen
+ (text
- word
) + 5);
4031 strncpy (new, word
, text
- word
);
4032 new[text
- word
] = '\0';
4033 strcat (new, fname
);
4035 (*list
)[*list_used
] = new;
4036 (*list
)[++*list_used
] = NULL
;
4040 not_interesting_fname (const char *fname
)
4042 static const char *illegal_aliens
[] = {
4043 "_globals_", /* inserted by coff_symtab_read */
4048 for (i
= 0; illegal_aliens
[i
]; i
++)
4050 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
4056 /* Return a NULL terminated array of all source files whose names
4057 begin with matching TEXT. The file names are looked up in the
4058 symbol tables of this program. If the answer is no matchess, then
4059 the return value is an array which contains only a NULL pointer. */
4062 make_source_files_completion_list (char *text
, char *word
)
4065 struct partial_symtab
*ps
;
4066 struct objfile
*objfile
;
4068 int list_alloced
= 1;
4070 size_t text_len
= strlen (text
);
4071 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4072 const char *base_name
;
4076 if (!have_full_symbols () && !have_partial_symbols ())
4079 ALL_SYMTABS (objfile
, s
)
4081 if (not_interesting_fname (s
->filename
))
4083 if (!filename_seen (s
->filename
, 1, &first
)
4084 #if HAVE_DOS_BASED_FILE_SYSTEM
4085 && strncasecmp (s
->filename
, text
, text_len
) == 0
4087 && strncmp (s
->filename
, text
, text_len
) == 0
4091 /* This file matches for a completion; add it to the current
4093 add_filename_to_list (s
->filename
, text
, word
,
4094 &list
, &list_used
, &list_alloced
);
4098 /* NOTE: We allow the user to type a base name when the
4099 debug info records leading directories, but not the other
4100 way around. This is what subroutines of breakpoint
4101 command do when they parse file names. */
4102 base_name
= lbasename (s
->filename
);
4103 if (base_name
!= s
->filename
4104 && !filename_seen (base_name
, 1, &first
)
4105 #if HAVE_DOS_BASED_FILE_SYSTEM
4106 && strncasecmp (base_name
, text
, text_len
) == 0
4108 && strncmp (base_name
, text
, text_len
) == 0
4111 add_filename_to_list (base_name
, text
, word
,
4112 &list
, &list_used
, &list_alloced
);
4116 ALL_PSYMTABS (objfile
, ps
)
4118 if (not_interesting_fname (ps
->filename
))
4122 if (!filename_seen (ps
->filename
, 1, &first
)
4123 #if HAVE_DOS_BASED_FILE_SYSTEM
4124 && strncasecmp (ps
->filename
, text
, text_len
) == 0
4126 && strncmp (ps
->filename
, text
, text_len
) == 0
4130 /* This file matches for a completion; add it to the
4131 current list of matches. */
4132 add_filename_to_list (ps
->filename
, text
, word
,
4133 &list
, &list_used
, &list_alloced
);
4138 base_name
= lbasename (ps
->filename
);
4139 if (base_name
!= ps
->filename
4140 && !filename_seen (base_name
, 1, &first
)
4141 #if HAVE_DOS_BASED_FILE_SYSTEM
4142 && strncasecmp (base_name
, text
, text_len
) == 0
4144 && strncmp (base_name
, text
, text_len
) == 0
4147 add_filename_to_list (base_name
, text
, word
,
4148 &list
, &list_used
, &list_alloced
);
4156 /* Determine if PC is in the prologue of a function. The prologue is the area
4157 between the first instruction of a function, and the first executable line.
4158 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4160 If non-zero, func_start is where we think the prologue starts, possibly
4161 by previous examination of symbol table information.
4165 in_prologue (CORE_ADDR pc
, CORE_ADDR func_start
)
4167 struct symtab_and_line sal
;
4168 CORE_ADDR func_addr
, func_end
;
4170 /* We have several sources of information we can consult to figure
4172 - Compilers usually emit line number info that marks the prologue
4173 as its own "source line". So the ending address of that "line"
4174 is the end of the prologue. If available, this is the most
4176 - The minimal symbols and partial symbols, which can usually tell
4177 us the starting and ending addresses of a function.
4178 - If we know the function's start address, we can call the
4179 architecture-defined gdbarch_skip_prologue function to analyze the
4180 instruction stream and guess where the prologue ends.
4181 - Our `func_start' argument; if non-zero, this is the caller's
4182 best guess as to the function's entry point. At the time of
4183 this writing, handle_inferior_event doesn't get this right, so
4184 it should be our last resort. */
4186 /* Consult the partial symbol table, to find which function
4188 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4190 CORE_ADDR prologue_end
;
4192 /* We don't even have minsym information, so fall back to using
4193 func_start, if given. */
4195 return 1; /* We *might* be in a prologue. */
4197 prologue_end
= gdbarch_skip_prologue (current_gdbarch
, func_start
);
4199 return func_start
<= pc
&& pc
< prologue_end
;
4202 /* If we have line number information for the function, that's
4203 usually pretty reliable. */
4204 sal
= find_pc_line (func_addr
, 0);
4206 /* Now sal describes the source line at the function's entry point,
4207 which (by convention) is the prologue. The end of that "line",
4208 sal.end, is the end of the prologue.
4210 Note that, for functions whose source code is all on a single
4211 line, the line number information doesn't always end up this way.
4212 So we must verify that our purported end-of-prologue address is
4213 *within* the function, not at its start or end. */
4215 || sal
.end
<= func_addr
4216 || func_end
<= sal
.end
)
4218 /* We don't have any good line number info, so use the minsym
4219 information, together with the architecture-specific prologue
4221 CORE_ADDR prologue_end
= gdbarch_skip_prologue
4222 (current_gdbarch
, func_addr
);
4224 return func_addr
<= pc
&& pc
< prologue_end
;
4227 /* We have line number info, and it looks good. */
4228 return func_addr
<= pc
&& pc
< sal
.end
;
4231 /* Given PC at the function's start address, attempt to find the
4232 prologue end using SAL information. Return zero if the skip fails.
4234 A non-optimized prologue traditionally has one SAL for the function
4235 and a second for the function body. A single line function has
4236 them both pointing at the same line.
4238 An optimized prologue is similar but the prologue may contain
4239 instructions (SALs) from the instruction body. Need to skip those
4240 while not getting into the function body.
4242 The functions end point and an increasing SAL line are used as
4243 indicators of the prologue's endpoint.
4245 This code is based on the function refine_prologue_limit (versions
4246 found in both ia64 and ppc). */
4249 skip_prologue_using_sal (CORE_ADDR func_addr
)
4251 struct symtab_and_line prologue_sal
;
4255 /* Get an initial range for the function. */
4256 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4257 start_pc
+= gdbarch_deprecated_function_start_offset (current_gdbarch
);
4259 prologue_sal
= find_pc_line (start_pc
, 0);
4260 if (prologue_sal
.line
!= 0)
4262 /* If there is only one sal that covers the entire function,
4263 then it is probably a single line function, like
4265 if (prologue_sal
.end
>= end_pc
)
4267 while (prologue_sal
.end
< end_pc
)
4269 struct symtab_and_line sal
;
4271 sal
= find_pc_line (prologue_sal
.end
, 0);
4274 /* Assume that a consecutive SAL for the same (or larger)
4275 line mark the prologue -> body transition. */
4276 if (sal
.line
>= prologue_sal
.line
)
4278 /* The case in which compiler's optimizer/scheduler has
4279 moved instructions into the prologue. We look ahead in
4280 the function looking for address ranges whose
4281 corresponding line number is less the first one that we
4282 found for the function. This is more conservative then
4283 refine_prologue_limit which scans a large number of SALs
4284 looking for any in the prologue */
4288 return prologue_sal
.end
;
4291 struct symtabs_and_lines
4292 decode_line_spec (char *string
, int funfirstline
)
4294 struct symtabs_and_lines sals
;
4295 struct symtab_and_line cursal
;
4298 error (_("Empty line specification."));
4300 /* We use whatever is set as the current source line. We do not try
4301 and get a default or it will recursively call us! */
4302 cursal
= get_current_source_symtab_and_line ();
4304 sals
= decode_line_1 (&string
, funfirstline
,
4305 cursal
.symtab
, cursal
.line
,
4306 (char ***) NULL
, NULL
);
4309 error (_("Junk at end of line specification: %s"), string
);
4314 static char *name_of_main
;
4317 set_main_name (const char *name
)
4319 if (name_of_main
!= NULL
)
4321 xfree (name_of_main
);
4322 name_of_main
= NULL
;
4326 name_of_main
= xstrdup (name
);
4330 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4334 find_main_name (void)
4336 const char *new_main_name
;
4338 /* Try to see if the main procedure is in Ada. */
4339 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4340 be to add a new method in the language vector, and call this
4341 method for each language until one of them returns a non-empty
4342 name. This would allow us to remove this hard-coded call to
4343 an Ada function. It is not clear that this is a better approach
4344 at this point, because all methods need to be written in a way
4345 such that false positives never be returned. For instance, it is
4346 important that a method does not return a wrong name for the main
4347 procedure if the main procedure is actually written in a different
4348 language. It is easy to guaranty this with Ada, since we use a
4349 special symbol generated only when the main in Ada to find the name
4350 of the main procedure. It is difficult however to see how this can
4351 be guarantied for languages such as C, for instance. This suggests
4352 that order of call for these methods becomes important, which means
4353 a more complicated approach. */
4354 new_main_name
= ada_main_name ();
4355 if (new_main_name
!= NULL
)
4357 set_main_name (new_main_name
);
4361 new_main_name
= pascal_main_name ();
4362 if (new_main_name
!= NULL
)
4364 set_main_name (new_main_name
);
4368 /* The languages above didn't identify the name of the main procedure.
4369 Fallback to "main". */
4370 set_main_name ("main");
4376 if (name_of_main
== NULL
)
4379 return name_of_main
;
4382 /* Handle ``executable_changed'' events for the symtab module. */
4385 symtab_observer_executable_changed (void *unused
)
4387 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4388 set_main_name (NULL
);
4391 /* Helper to expand_line_sal below. Appends new sal to SAL,
4392 initializing it from SYMTAB, LINENO and PC. */
4394 append_expanded_sal (struct symtabs_and_lines
*sal
,
4395 struct symtab
*symtab
,
4396 int lineno
, CORE_ADDR pc
)
4398 CORE_ADDR func_addr
, func_end
;
4400 sal
->sals
= xrealloc (sal
->sals
,
4401 sizeof (sal
->sals
[0])
4402 * (sal
->nelts
+ 1));
4403 init_sal (sal
->sals
+ sal
->nelts
);
4404 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4405 sal
->sals
[sal
->nelts
].section
= NULL
;
4406 sal
->sals
[sal
->nelts
].end
= 0;
4407 sal
->sals
[sal
->nelts
].line
= lineno
;
4408 sal
->sals
[sal
->nelts
].pc
= pc
;
4412 /* Compute a set of all sals in
4413 the entire program that correspond to same file
4414 and line as SAL and return those. If there
4415 are several sals that belong to the same block,
4416 only one sal for the block is included in results. */
4418 struct symtabs_and_lines
4419 expand_line_sal (struct symtab_and_line sal
)
4421 struct symtabs_and_lines ret
, this_line
;
4423 struct objfile
*objfile
;
4424 struct partial_symtab
*psymtab
;
4425 struct symtab
*symtab
;
4428 struct block
**blocks
= NULL
;
4434 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4436 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4443 struct linetable_entry
*best_item
= 0;
4444 struct symtab
*best_symtab
= 0;
4449 /* We meed to find all symtabs for a file which name
4450 is described by sal. We cannot just directly
4451 iterate over symtabs, since a symtab might not be
4452 yet created. We also cannot iterate over psymtabs,
4453 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4454 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4455 corresponding to an included file. Therefore, we do
4456 first pass over psymtabs, reading in those with
4457 the right name. Then, we iterate over symtabs, knowing
4458 that all symtabs we're interested in are loaded. */
4460 ALL_PSYMTABS (objfile
, psymtab
)
4462 if (strcmp (sal
.symtab
->filename
,
4463 psymtab
->filename
) == 0)
4464 PSYMTAB_TO_SYMTAB (psymtab
);
4468 /* For each symtab, we add all pcs to ret.sals. I'm actually
4469 not sure what to do if we have exact match in one symtab,
4470 and non-exact match on another symtab.
4472 ALL_SYMTABS (objfile
, symtab
)
4474 if (strcmp (sal
.symtab
->filename
,
4475 symtab
->filename
) == 0)
4477 struct linetable
*l
;
4479 l
= LINETABLE (symtab
);
4484 for (j
= 0; j
< len
; j
++)
4486 struct linetable_entry
*item
= &(l
->item
[j
]);
4488 if (item
->line
== lineno
)
4491 append_expanded_sal (&ret
, symtab
, lineno
, item
->pc
);
4493 else if (!exact
&& item
->line
> lineno
4494 && (best_item
== NULL
|| item
->line
< best_item
->line
))
4498 best_symtab
= symtab
;
4503 if (!exact
&& best_item
)
4504 append_expanded_sal (&ret
, best_symtab
, lineno
, best_item
->pc
);
4507 /* For optimized code, compiler can scatter one source line accross
4508 disjoint ranges of PC values, even when no duplicate functions
4509 or inline functions are involved. For example, 'for (;;)' inside
4510 non-template non-inline non-ctor-or-dtor function can result
4511 in two PC ranges. In this case, we don't want to set breakpoint
4512 on first PC of each range. To filter such cases, we use containing
4513 blocks -- for each PC found above we see if there are other PCs
4514 that are in the same block. If yes, the other PCs are filtered out. */
4516 filter
= xmalloc (ret
.nelts
* sizeof (int));
4517 blocks
= xmalloc (ret
.nelts
* sizeof (struct block
*));
4518 for (i
= 0; i
< ret
.nelts
; ++i
)
4521 blocks
[i
] = block_for_pc (ret
.sals
[i
].pc
);
4524 for (i
= 0; i
< ret
.nelts
; ++i
)
4525 if (blocks
[i
] != NULL
)
4526 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4527 if (blocks
[j
] == blocks
[i
])
4535 struct symtab_and_line
*final
=
4536 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4538 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4540 final
[j
++] = ret
.sals
[i
];
4542 ret
.nelts
-= deleted
;
4552 _initialize_symtab (void)
4554 add_info ("variables", variables_info
, _("\
4555 All global and static variable names, or those matching REGEXP."));
4557 add_com ("whereis", class_info
, variables_info
, _("\
4558 All global and static variable names, or those matching REGEXP."));
4560 add_info ("functions", functions_info
,
4561 _("All function names, or those matching REGEXP."));
4564 /* FIXME: This command has at least the following problems:
4565 1. It prints builtin types (in a very strange and confusing fashion).
4566 2. It doesn't print right, e.g. with
4567 typedef struct foo *FOO
4568 type_print prints "FOO" when we want to make it (in this situation)
4569 print "struct foo *".
4570 I also think "ptype" or "whatis" is more likely to be useful (but if
4571 there is much disagreement "info types" can be fixed). */
4572 add_info ("types", types_info
,
4573 _("All type names, or those matching REGEXP."));
4575 add_info ("sources", sources_info
,
4576 _("Source files in the program."));
4578 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4579 _("Set a breakpoint for all functions matching REGEXP."));
4583 add_com ("lf", class_info
, sources_info
,
4584 _("Source files in the program"));
4585 add_com ("lg", class_info
, variables_info
, _("\
4586 All global and static variable names, or those matching REGEXP."));
4589 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4590 multiple_symbols_modes
, &multiple_symbols_mode
,
4592 Set the debugger behavior when more than one symbol are possible matches\n\
4593 in an expression."), _("\
4594 Show how the debugger handles ambiguities in expressions."), _("\
4595 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4596 NULL
, NULL
, &setlist
, &showlist
);
4598 /* Initialize the one built-in type that isn't language dependent... */
4599 builtin_type_error
= init_type (TYPE_CODE_ERROR
, 0, 0,
4600 "<unknown type>", (struct objfile
*) NULL
);
4602 observer_attach_executable_changed (symtab_observer_executable_changed
);