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
);
92 struct symbol
*lookup_symbol_aux_local (const char *name
,
93 const char *linkage_name
,
94 const struct block
*block
,
95 const domain_enum domain
);
98 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
100 const char *linkage_name
,
101 const domain_enum domain
);
104 struct symbol
*lookup_symbol_aux_psymtabs (int block_index
,
106 const char *linkage_name
,
107 const domain_enum domain
);
109 static int file_matches (char *, char **, int);
111 static void print_symbol_info (domain_enum
,
112 struct symtab
*, struct symbol
*, int, char *);
114 static void print_msymbol_info (struct minimal_symbol
*);
116 static void symtab_symbol_info (char *, domain_enum
, int);
118 void _initialize_symtab (void);
122 /* Allow the user to configure the debugger behavior with respect
123 to multiple-choice menus when more than one symbol matches during
126 const char multiple_symbols_ask
[] = "ask";
127 const char multiple_symbols_all
[] = "all";
128 const char multiple_symbols_cancel
[] = "cancel";
129 static const char *multiple_symbols_modes
[] =
131 multiple_symbols_ask
,
132 multiple_symbols_all
,
133 multiple_symbols_cancel
,
136 static const char *multiple_symbols_mode
= multiple_symbols_all
;
138 /* Read-only accessor to AUTO_SELECT_MODE. */
141 multiple_symbols_select_mode (void)
143 return multiple_symbols_mode
;
146 /* The single non-language-specific builtin type */
147 struct type
*builtin_type_error
;
149 /* Block in which the most recently searched-for symbol was found.
150 Might be better to make this a parameter to lookup_symbol and
153 const struct block
*block_found
;
155 /* Check for a symtab of a specific name; first in symtabs, then in
156 psymtabs. *If* there is no '/' in the name, a match after a '/'
157 in the symtab filename will also work. */
160 lookup_symtab (const char *name
)
163 struct partial_symtab
*ps
;
164 struct objfile
*objfile
;
165 char *real_path
= NULL
;
166 char *full_path
= NULL
;
168 /* Here we are interested in canonicalizing an absolute path, not
169 absolutizing a relative path. */
170 if (IS_ABSOLUTE_PATH (name
))
172 full_path
= xfullpath (name
);
173 make_cleanup (xfree
, full_path
);
174 real_path
= gdb_realpath (name
);
175 make_cleanup (xfree
, real_path
);
180 /* First, search for an exact match */
182 ALL_SYMTABS (objfile
, s
)
184 if (FILENAME_CMP (name
, s
->filename
) == 0)
189 /* If the user gave us an absolute path, try to find the file in
190 this symtab and use its absolute path. */
192 if (full_path
!= NULL
)
194 const char *fp
= symtab_to_fullname (s
);
195 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
201 if (real_path
!= NULL
)
203 char *fullname
= symtab_to_fullname (s
);
204 if (fullname
!= NULL
)
206 char *rp
= gdb_realpath (fullname
);
207 make_cleanup (xfree
, rp
);
208 if (FILENAME_CMP (real_path
, rp
) == 0)
216 /* Now, search for a matching tail (only if name doesn't have any dirs) */
218 if (lbasename (name
) == name
)
219 ALL_SYMTABS (objfile
, s
)
221 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
225 /* Same search rules as above apply here, but now we look thru the
228 ps
= lookup_partial_symtab (name
);
233 error (_("Internal: readin %s pst for `%s' found when no symtab found."),
236 s
= PSYMTAB_TO_SYMTAB (ps
);
241 /* At this point, we have located the psymtab for this file, but
242 the conversion to a symtab has failed. This usually happens
243 when we are looking up an include file. In this case,
244 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
245 been created. So, we need to run through the symtabs again in
246 order to find the file.
247 XXX - This is a crock, and should be fixed inside of the the
248 symbol parsing routines. */
252 /* Lookup the partial symbol table of a source file named NAME.
253 *If* there is no '/' in the name, a match after a '/'
254 in the psymtab filename will also work. */
256 struct partial_symtab
*
257 lookup_partial_symtab (const char *name
)
259 struct partial_symtab
*pst
;
260 struct objfile
*objfile
;
261 char *full_path
= NULL
;
262 char *real_path
= NULL
;
264 /* Here we are interested in canonicalizing an absolute path, not
265 absolutizing a relative path. */
266 if (IS_ABSOLUTE_PATH (name
))
268 full_path
= xfullpath (name
);
269 make_cleanup (xfree
, full_path
);
270 real_path
= gdb_realpath (name
);
271 make_cleanup (xfree
, real_path
);
274 ALL_PSYMTABS (objfile
, pst
)
276 if (FILENAME_CMP (name
, pst
->filename
) == 0)
281 /* If the user gave us an absolute path, try to find the file in
282 this symtab and use its absolute path. */
283 if (full_path
!= NULL
)
285 psymtab_to_fullname (pst
);
286 if (pst
->fullname
!= NULL
287 && FILENAME_CMP (full_path
, pst
->fullname
) == 0)
293 if (real_path
!= NULL
)
296 psymtab_to_fullname (pst
);
297 if (pst
->fullname
!= NULL
)
299 rp
= gdb_realpath (pst
->fullname
);
300 make_cleanup (xfree
, rp
);
302 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
309 /* Now, search for a matching tail (only if name doesn't have any dirs) */
311 if (lbasename (name
) == name
)
312 ALL_PSYMTABS (objfile
, pst
)
314 if (FILENAME_CMP (lbasename (pst
->filename
), name
) == 0)
321 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
322 full method name, which consist of the class name (from T), the unadorned
323 method name from METHOD_ID, and the signature for the specific overload,
324 specified by SIGNATURE_ID. Note that this function is g++ specific. */
327 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
329 int mangled_name_len
;
331 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
332 struct fn_field
*method
= &f
[signature_id
];
333 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
334 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
335 char *newname
= type_name_no_tag (type
);
337 /* Does the form of physname indicate that it is the full mangled name
338 of a constructor (not just the args)? */
339 int is_full_physname_constructor
;
342 int is_destructor
= is_destructor_name (physname
);
343 /* Need a new type prefix. */
344 char *const_prefix
= method
->is_const
? "C" : "";
345 char *volatile_prefix
= method
->is_volatile
? "V" : "";
347 int len
= (newname
== NULL
? 0 : strlen (newname
));
349 /* Nothing to do if physname already contains a fully mangled v3 abi name
350 or an operator name. */
351 if ((physname
[0] == '_' && physname
[1] == 'Z')
352 || is_operator_name (field_name
))
353 return xstrdup (physname
);
355 is_full_physname_constructor
= is_constructor_name (physname
);
358 is_full_physname_constructor
|| (newname
&& strcmp (field_name
, newname
) == 0);
361 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
363 if (is_destructor
|| is_full_physname_constructor
)
365 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
366 strcpy (mangled_name
, physname
);
372 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
374 else if (physname
[0] == 't' || physname
[0] == 'Q')
376 /* The physname for template and qualified methods already includes
378 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
384 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
386 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
387 + strlen (buf
) + len
+ strlen (physname
) + 1);
390 mangled_name
= (char *) xmalloc (mangled_name_len
);
392 mangled_name
[0] = '\0';
394 strcpy (mangled_name
, field_name
);
396 strcat (mangled_name
, buf
);
397 /* If the class doesn't have a name, i.e. newname NULL, then we just
398 mangle it using 0 for the length of the class. Thus it gets mangled
399 as something starting with `::' rather than `classname::'. */
401 strcat (mangled_name
, newname
);
403 strcat (mangled_name
, physname
);
404 return (mangled_name
);
408 /* Initialize the language dependent portion of a symbol
409 depending upon the language for the symbol. */
411 symbol_init_language_specific (struct general_symbol_info
*gsymbol
,
412 enum language language
)
414 gsymbol
->language
= language
;
415 if (gsymbol
->language
== language_cplus
416 || gsymbol
->language
== language_java
417 || gsymbol
->language
== language_objc
)
419 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
423 memset (&gsymbol
->language_specific
, 0,
424 sizeof (gsymbol
->language_specific
));
428 /* Functions to initialize a symbol's mangled name. */
430 /* Create the hash table used for demangled names. Each hash entry is
431 a pair of strings; one for the mangled name and one for the demangled
432 name. The entry is hashed via just the mangled name. */
435 create_demangled_names_hash (struct objfile
*objfile
)
437 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
438 The hash table code will round this up to the next prime number.
439 Choosing a much larger table size wastes memory, and saves only about
440 1% in symbol reading. */
442 objfile
->demangled_names_hash
= htab_create_alloc
443 (256, htab_hash_string
, (int (*) (const void *, const void *)) streq
,
444 NULL
, xcalloc
, xfree
);
447 /* Try to determine the demangled name for a symbol, based on the
448 language of that symbol. If the language is set to language_auto,
449 it will attempt to find any demangling algorithm that works and
450 then set the language appropriately. The returned name is allocated
451 by the demangler and should be xfree'd. */
454 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
457 char *demangled
= NULL
;
459 if (gsymbol
->language
== language_unknown
)
460 gsymbol
->language
= language_auto
;
462 if (gsymbol
->language
== language_objc
463 || gsymbol
->language
== language_auto
)
466 objc_demangle (mangled
, 0);
467 if (demangled
!= NULL
)
469 gsymbol
->language
= language_objc
;
473 if (gsymbol
->language
== language_cplus
474 || gsymbol
->language
== language_auto
)
477 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
478 if (demangled
!= NULL
)
480 gsymbol
->language
= language_cplus
;
484 if (gsymbol
->language
== language_java
)
487 cplus_demangle (mangled
,
488 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
489 if (demangled
!= NULL
)
491 gsymbol
->language
= language_java
;
498 /* Set both the mangled and demangled (if any) names for GSYMBOL based
499 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
500 is used, and the memory comes from that objfile's objfile_obstack.
501 LINKAGE_NAME is copied, so the pointer can be discarded after
502 calling this function. */
504 /* We have to be careful when dealing with Java names: when we run
505 into a Java minimal symbol, we don't know it's a Java symbol, so it
506 gets demangled as a C++ name. This is unfortunate, but there's not
507 much we can do about it: but when demangling partial symbols and
508 regular symbols, we'd better not reuse the wrong demangled name.
509 (See PR gdb/1039.) We solve this by putting a distinctive prefix
510 on Java names when storing them in the hash table. */
512 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
513 don't mind the Java prefix so much: different languages have
514 different demangling requirements, so it's only natural that we
515 need to keep language data around in our demangling cache. But
516 it's not good that the minimal symbol has the wrong demangled name.
517 Unfortunately, I can't think of any easy solution to that
520 #define JAVA_PREFIX "##JAVA$$"
521 #define JAVA_PREFIX_LEN 8
524 symbol_set_names (struct general_symbol_info
*gsymbol
,
525 const char *linkage_name
, int len
, struct objfile
*objfile
)
528 /* A 0-terminated copy of the linkage name. */
529 const char *linkage_name_copy
;
530 /* A copy of the linkage name that might have a special Java prefix
531 added to it, for use when looking names up in the hash table. */
532 const char *lookup_name
;
533 /* The length of lookup_name. */
536 if (objfile
->demangled_names_hash
== NULL
)
537 create_demangled_names_hash (objfile
);
539 if (gsymbol
->language
== language_ada
)
541 /* In Ada, we do the symbol lookups using the mangled name, so
542 we can save some space by not storing the demangled name.
544 As a side note, we have also observed some overlap between
545 the C++ mangling and Ada mangling, similarly to what has
546 been observed with Java. Because we don't store the demangled
547 name with the symbol, we don't need to use the same trick
549 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
550 memcpy (gsymbol
->name
, linkage_name
, len
);
551 gsymbol
->name
[len
] = '\0';
552 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
557 /* The stabs reader generally provides names that are not
558 NUL-terminated; most of the other readers don't do this, so we
559 can just use the given copy, unless we're in the Java case. */
560 if (gsymbol
->language
== language_java
)
563 lookup_len
= len
+ JAVA_PREFIX_LEN
;
565 alloc_name
= alloca (lookup_len
+ 1);
566 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
567 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
568 alloc_name
[lookup_len
] = '\0';
570 lookup_name
= alloc_name
;
571 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
573 else if (linkage_name
[len
] != '\0')
578 alloc_name
= alloca (lookup_len
+ 1);
579 memcpy (alloc_name
, linkage_name
, len
);
580 alloc_name
[lookup_len
] = '\0';
582 lookup_name
= alloc_name
;
583 linkage_name_copy
= alloc_name
;
588 lookup_name
= linkage_name
;
589 linkage_name_copy
= linkage_name
;
592 slot
= (char **) htab_find_slot (objfile
->demangled_names_hash
,
593 lookup_name
, INSERT
);
595 /* If this name is not in the hash table, add it. */
598 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
600 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
602 /* If there is a demangled name, place it right after the mangled name.
603 Otherwise, just place a second zero byte after the end of the mangled
605 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
606 lookup_len
+ demangled_len
+ 2);
607 memcpy (*slot
, lookup_name
, lookup_len
+ 1);
608 if (demangled_name
!= NULL
)
610 memcpy (*slot
+ lookup_len
+ 1, demangled_name
, demangled_len
+ 1);
611 xfree (demangled_name
);
614 (*slot
)[lookup_len
+ 1] = '\0';
617 gsymbol
->name
= *slot
+ lookup_len
- len
;
618 if ((*slot
)[lookup_len
+ 1] != '\0')
619 gsymbol
->language_specific
.cplus_specific
.demangled_name
620 = &(*slot
)[lookup_len
+ 1];
622 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
625 /* Return the source code name of a symbol. In languages where
626 demangling is necessary, this is the demangled name. */
629 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
631 switch (gsymbol
->language
)
636 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
637 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
640 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
641 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
643 return ada_decode_symbol (gsymbol
);
648 return gsymbol
->name
;
651 /* Return the demangled name for a symbol based on the language for
652 that symbol. If no demangled name exists, return NULL. */
654 symbol_demangled_name (struct general_symbol_info
*gsymbol
)
656 switch (gsymbol
->language
)
661 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
662 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
665 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
666 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
668 return ada_decode_symbol (gsymbol
);
676 /* Return the search name of a symbol---generally the demangled or
677 linkage name of the symbol, depending on how it will be searched for.
678 If there is no distinct demangled name, then returns the same value
679 (same pointer) as SYMBOL_LINKAGE_NAME. */
681 symbol_search_name (const struct general_symbol_info
*gsymbol
)
683 if (gsymbol
->language
== language_ada
)
684 return gsymbol
->name
;
686 return symbol_natural_name (gsymbol
);
689 /* Initialize the structure fields to zero values. */
691 init_sal (struct symtab_and_line
*sal
)
698 sal
->explicit_pc
= 0;
699 sal
->explicit_line
= 0;
703 /* Return 1 if the two sections are the same, or if they could
704 plausibly be copies of each other, one in an original object
705 file and another in a separated debug file. */
708 matching_bfd_sections (asection
*first
, asection
*second
)
712 /* If they're the same section, then they match. */
716 /* If either is NULL, give up. */
717 if (first
== NULL
|| second
== NULL
)
720 /* This doesn't apply to absolute symbols. */
721 if (first
->owner
== NULL
|| second
->owner
== NULL
)
724 /* If they're in the same object file, they must be different sections. */
725 if (first
->owner
== second
->owner
)
728 /* Check whether the two sections are potentially corresponding. They must
729 have the same size, address, and name. We can't compare section indexes,
730 which would be more reliable, because some sections may have been
732 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
735 /* In-memory addresses may start at a different offset, relativize them. */
736 if (bfd_get_section_vma (first
->owner
, first
)
737 - bfd_get_start_address (first
->owner
)
738 != bfd_get_section_vma (second
->owner
, second
)
739 - bfd_get_start_address (second
->owner
))
742 if (bfd_get_section_name (first
->owner
, first
) == NULL
743 || bfd_get_section_name (second
->owner
, second
) == NULL
744 || strcmp (bfd_get_section_name (first
->owner
, first
),
745 bfd_get_section_name (second
->owner
, second
)) != 0)
748 /* Otherwise check that they are in corresponding objfiles. */
751 if (obj
->obfd
== first
->owner
)
753 gdb_assert (obj
!= NULL
);
755 if (obj
->separate_debug_objfile
!= NULL
756 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
758 if (obj
->separate_debug_objfile_backlink
!= NULL
759 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
765 /* Find which partial symtab contains PC and SECTION starting at psymtab PST.
766 We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */
768 struct partial_symtab
*
769 find_pc_sect_psymtab_closer (CORE_ADDR pc
, asection
*section
,
770 struct partial_symtab
*pst
,
771 struct minimal_symbol
*msymbol
)
773 struct objfile
*objfile
= pst
->objfile
;
774 struct partial_symtab
*tpst
;
775 struct partial_symtab
*best_pst
= pst
;
776 CORE_ADDR best_addr
= pst
->textlow
;
778 /* An objfile that has its functions reordered might have
779 many partial symbol tables containing the PC, but
780 we want the partial symbol table that contains the
781 function containing the PC. */
782 if (!(objfile
->flags
& OBJF_REORDERED
) &&
783 section
== 0) /* can't validate section this way */
789 /* The code range of partial symtabs sometimes overlap, so, in
790 the loop below, we need to check all partial symtabs and
791 find the one that fits better for the given PC address. We
792 select the partial symtab that contains a symbol whose
793 address is closest to the PC address. By closest we mean
794 that find_pc_sect_symbol returns the symbol with address
795 that is closest and still less than the given PC. */
796 for (tpst
= pst
; tpst
!= NULL
; tpst
= tpst
->next
)
798 if (pc
>= tpst
->textlow
&& pc
< tpst
->texthigh
)
800 struct partial_symbol
*p
;
803 /* NOTE: This assumes that every psymbol has a
804 corresponding msymbol, which is not necessarily
805 true; the debug info might be much richer than the
806 object's symbol table. */
807 p
= find_pc_sect_psymbol (tpst
, pc
, section
);
809 && SYMBOL_VALUE_ADDRESS (p
)
810 == SYMBOL_VALUE_ADDRESS (msymbol
))
813 /* Also accept the textlow value of a psymtab as a
814 "symbol", to provide some support for partial
815 symbol tables with line information but no debug
816 symbols (e.g. those produced by an assembler). */
818 this_addr
= SYMBOL_VALUE_ADDRESS (p
);
820 this_addr
= tpst
->textlow
;
822 /* Check whether it is closer than our current
823 BEST_ADDR. Since this symbol address is
824 necessarily lower or equal to PC, the symbol closer
825 to PC is the symbol which address is the highest.
826 This way we return the psymtab which contains such
827 best match symbol. This can help in cases where the
828 symbol information/debuginfo is not complete, like
829 for instance on IRIX6 with gcc, where no debug info
830 is emitted for statics. (See also the nodebug.exp
832 if (this_addr
> best_addr
)
834 best_addr
= this_addr
;
842 /* Find which partial symtab contains PC and SECTION. Return 0 if
843 none. We return the psymtab that contains a symbol whose address
844 exactly matches PC, or, if we cannot find an exact match, the
845 psymtab that contains a symbol whose address is closest to PC. */
846 struct partial_symtab
*
847 find_pc_sect_psymtab (CORE_ADDR pc
, asection
*section
)
849 struct objfile
*objfile
;
850 struct minimal_symbol
*msymbol
;
852 /* If we know that this is not a text address, return failure. This is
853 necessary because we loop based on texthigh and textlow, which do
854 not include the data ranges. */
855 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
857 && (msymbol
->type
== mst_data
858 || msymbol
->type
== mst_bss
859 || msymbol
->type
== mst_abs
860 || msymbol
->type
== mst_file_data
861 || msymbol
->type
== mst_file_bss
))
864 /* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
865 than the later used TEXTLOW/TEXTHIGH one. */
867 ALL_OBJFILES (objfile
)
868 if (objfile
->psymtabs_addrmap
!= NULL
)
870 struct partial_symtab
*pst
;
872 pst
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
875 /* FIXME: addrmaps currently do not handle overlayed sections,
876 so fall back to the non-addrmap case if we're debugging
877 overlays and the addrmap returned the wrong section. */
878 if (overlay_debugging
&& msymbol
&& section
)
880 struct partial_symbol
*p
;
881 /* NOTE: This assumes that every psymbol has a
882 corresponding msymbol, which is not necessarily
883 true; the debug info might be much richer than the
884 object's symbol table. */
885 p
= find_pc_sect_psymbol (pst
, pc
, section
);
887 || SYMBOL_VALUE_ADDRESS (p
)
888 != SYMBOL_VALUE_ADDRESS (msymbol
))
892 /* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as
893 PSYMTABS_ADDRMAP we used has already the best 1-byte
894 granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into
895 a worse chosen section due to the TEXTLOW/TEXTHIGH ranges
902 /* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
903 which still have no corresponding full SYMTABs read. But it is not
904 present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB
907 ALL_OBJFILES (objfile
)
909 struct partial_symtab
*pst
;
911 /* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of
912 its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying
913 debug info type in single OBJFILE. */
915 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
916 if (pc
>= pst
->textlow
&& pc
< pst
->texthigh
)
918 struct partial_symtab
*best_pst
;
920 best_pst
= find_pc_sect_psymtab_closer (pc
, section
, pst
,
922 if (best_pst
!= NULL
)
930 /* Find which partial symtab contains PC. Return 0 if none.
931 Backward compatibility, no section */
933 struct partial_symtab
*
934 find_pc_psymtab (CORE_ADDR pc
)
936 return find_pc_sect_psymtab (pc
, find_pc_mapped_section (pc
));
939 /* Find which partial symbol within a psymtab matches PC and SECTION.
940 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
942 struct partial_symbol
*
943 find_pc_sect_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
,
946 struct partial_symbol
*best
= NULL
, *p
, **pp
;
950 psymtab
= find_pc_sect_psymtab (pc
, section
);
954 /* Cope with programs that start at address 0 */
955 best_pc
= (psymtab
->textlow
!= 0) ? psymtab
->textlow
- 1 : 0;
957 /* Search the global symbols as well as the static symbols, so that
958 find_pc_partial_function doesn't use a minimal symbol and thus
959 cache a bad endaddr. */
960 for (pp
= psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
;
961 (pp
- (psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
)
962 < psymtab
->n_global_syms
);
966 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
967 && SYMBOL_CLASS (p
) == LOC_BLOCK
968 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
969 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
970 || (psymtab
->textlow
== 0
971 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
973 if (section
) /* match on a specific section */
975 fixup_psymbol_section (p
, psymtab
->objfile
);
976 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p
), section
))
979 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
984 for (pp
= psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
;
985 (pp
- (psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
)
986 < psymtab
->n_static_syms
);
990 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
991 && SYMBOL_CLASS (p
) == LOC_BLOCK
992 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
993 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
994 || (psymtab
->textlow
== 0
995 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
997 if (section
) /* match on a specific section */
999 fixup_psymbol_section (p
, psymtab
->objfile
);
1000 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p
), section
))
1003 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
1011 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
1012 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
1014 struct partial_symbol
*
1015 find_pc_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
)
1017 return find_pc_sect_psymbol (psymtab
, pc
, find_pc_mapped_section (pc
));
1020 /* Debug symbols usually don't have section information. We need to dig that
1021 out of the minimal symbols and stash that in the debug symbol. */
1024 fixup_section (struct general_symbol_info
*ginfo
,
1025 CORE_ADDR addr
, struct objfile
*objfile
)
1027 struct minimal_symbol
*msym
;
1029 /* First, check whether a minimal symbol with the same name exists
1030 and points to the same address. The address check is required
1031 e.g. on PowerPC64, where the minimal symbol for a function will
1032 point to the function descriptor, while the debug symbol will
1033 point to the actual function code. */
1034 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1037 ginfo
->bfd_section
= SYMBOL_BFD_SECTION (msym
);
1038 ginfo
->section
= SYMBOL_SECTION (msym
);
1042 /* Static, function-local variables do appear in the linker
1043 (minimal) symbols, but are frequently given names that won't
1044 be found via lookup_minimal_symbol(). E.g., it has been
1045 observed in frv-uclinux (ELF) executables that a static,
1046 function-local variable named "foo" might appear in the
1047 linker symbols as "foo.6" or "foo.3". Thus, there is no
1048 point in attempting to extend the lookup-by-name mechanism to
1049 handle this case due to the fact that there can be multiple
1052 So, instead, search the section table when lookup by name has
1053 failed. The ``addr'' and ``endaddr'' fields may have already
1054 been relocated. If so, the relocation offset (i.e. the
1055 ANOFFSET value) needs to be subtracted from these values when
1056 performing the comparison. We unconditionally subtract it,
1057 because, when no relocation has been performed, the ANOFFSET
1058 value will simply be zero.
1060 The address of the symbol whose section we're fixing up HAS
1061 NOT BEEN adjusted (relocated) yet. It can't have been since
1062 the section isn't yet known and knowing the section is
1063 necessary in order to add the correct relocation value. In
1064 other words, we wouldn't even be in this function (attempting
1065 to compute the section) if it were already known.
1067 Note that it is possible to search the minimal symbols
1068 (subtracting the relocation value if necessary) to find the
1069 matching minimal symbol, but this is overkill and much less
1070 efficient. It is not necessary to find the matching minimal
1071 symbol, only its section.
1073 Note that this technique (of doing a section table search)
1074 can fail when unrelocated section addresses overlap. For
1075 this reason, we still attempt a lookup by name prior to doing
1076 a search of the section table. */
1078 struct obj_section
*s
;
1079 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1081 int idx
= s
->the_bfd_section
->index
;
1082 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1084 if (s
->addr
- offset
<= addr
&& addr
< s
->endaddr
- offset
)
1086 ginfo
->bfd_section
= s
->the_bfd_section
;
1087 ginfo
->section
= idx
;
1095 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1102 if (SYMBOL_BFD_SECTION (sym
))
1105 /* We either have an OBJFILE, or we can get at it from the sym's
1106 symtab. Anything else is a bug. */
1107 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1109 if (objfile
== NULL
)
1110 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1112 /* We should have an objfile by now. */
1113 gdb_assert (objfile
);
1115 switch (SYMBOL_CLASS (sym
))
1120 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1123 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1127 /* Nothing else will be listed in the minsyms -- no use looking
1132 fixup_section (&sym
->ginfo
, addr
, objfile
);
1137 struct partial_symbol
*
1138 fixup_psymbol_section (struct partial_symbol
*psym
, struct objfile
*objfile
)
1145 if (SYMBOL_BFD_SECTION (psym
))
1148 gdb_assert (objfile
);
1150 switch (SYMBOL_CLASS (psym
))
1156 addr
= SYMBOL_VALUE_ADDRESS (psym
);
1159 /* Nothing else will be listed in the minsyms -- no use looking
1164 fixup_section (&psym
->ginfo
, addr
, objfile
);
1169 /* Find the definition for a specified symbol name NAME
1170 in domain DOMAIN, visible from lexical block BLOCK.
1171 Returns the struct symbol pointer, or zero if no symbol is found.
1172 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1173 NAME is a field of the current implied argument `this'. If so set
1174 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1175 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1176 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1178 /* This function has a bunch of loops in it and it would seem to be
1179 attractive to put in some QUIT's (though I'm not really sure
1180 whether it can run long enough to be really important). But there
1181 are a few calls for which it would appear to be bad news to quit
1182 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1183 that there is C++ code below which can error(), but that probably
1184 doesn't affect these calls since they are looking for a known
1185 variable and thus can probably assume it will never hit the C++
1189 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1190 const domain_enum domain
, enum language lang
,
1191 int *is_a_field_of_this
)
1193 char *demangled_name
= NULL
;
1194 const char *modified_name
= NULL
;
1195 const char *mangled_name
= NULL
;
1196 int needtofreename
= 0;
1197 struct symbol
*returnval
;
1199 modified_name
= name
;
1201 /* If we are using C++ or Java, demangle the name before doing a lookup, so
1202 we can always binary search. */
1203 if (lang
== language_cplus
)
1205 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1208 mangled_name
= name
;
1209 modified_name
= demangled_name
;
1213 else if (lang
== language_java
)
1215 demangled_name
= cplus_demangle (name
,
1216 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1219 mangled_name
= name
;
1220 modified_name
= demangled_name
;
1225 if (case_sensitivity
== case_sensitive_off
)
1230 len
= strlen (name
);
1231 copy
= (char *) alloca (len
+ 1);
1232 for (i
= 0; i
< len
; i
++)
1233 copy
[i
] = tolower (name
[i
]);
1235 modified_name
= copy
;
1238 returnval
= lookup_symbol_aux (modified_name
, mangled_name
, block
,
1239 domain
, lang
, is_a_field_of_this
);
1241 xfree (demangled_name
);
1246 /* Behave like lookup_symbol_in_language, but performed with the
1247 current language. */
1250 lookup_symbol (const char *name
, const struct block
*block
,
1251 domain_enum domain
, int *is_a_field_of_this
)
1253 return lookup_symbol_in_language (name
, block
, domain
,
1254 current_language
->la_language
,
1255 is_a_field_of_this
);
1258 /* Behave like lookup_symbol except that NAME is the natural name
1259 of the symbol that we're looking for and, if LINKAGE_NAME is
1260 non-NULL, ensure that the symbol's linkage name matches as
1263 static struct symbol
*
1264 lookup_symbol_aux (const char *name
, const char *linkage_name
,
1265 const struct block
*block
, const domain_enum domain
,
1266 enum language language
, int *is_a_field_of_this
)
1269 const struct language_defn
*langdef
;
1271 /* Make sure we do something sensible with is_a_field_of_this, since
1272 the callers that set this parameter to some non-null value will
1273 certainly use it later and expect it to be either 0 or 1.
1274 If we don't set it, the contents of is_a_field_of_this are
1276 if (is_a_field_of_this
!= NULL
)
1277 *is_a_field_of_this
= 0;
1279 /* Search specified block and its superiors. Don't search
1280 STATIC_BLOCK or GLOBAL_BLOCK. */
1282 sym
= lookup_symbol_aux_local (name
, linkage_name
, block
, domain
);
1286 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1287 check to see if NAME is a field of `this'. */
1289 langdef
= language_def (language
);
1291 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1294 struct symbol
*sym
= NULL
;
1295 /* 'this' is only defined in the function's block, so find the
1296 enclosing function block. */
1297 for (; block
&& !BLOCK_FUNCTION (block
);
1298 block
= BLOCK_SUPERBLOCK (block
));
1300 if (block
&& !dict_empty (BLOCK_DICT (block
)))
1301 sym
= lookup_block_symbol (block
, langdef
->la_name_of_this
,
1305 struct type
*t
= sym
->type
;
1307 /* I'm not really sure that type of this can ever
1308 be typedefed; just be safe. */
1310 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1311 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1312 t
= TYPE_TARGET_TYPE (t
);
1314 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1315 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1316 error (_("Internal error: `%s' is not an aggregate"),
1317 langdef
->la_name_of_this
);
1319 if (check_field (t
, name
))
1321 *is_a_field_of_this
= 1;
1327 /* Now do whatever is appropriate for LANGUAGE to look
1328 up static and global variables. */
1330 sym
= langdef
->la_lookup_symbol_nonlocal (name
, linkage_name
, block
, domain
);
1334 /* Now search all static file-level symbols. Not strictly correct,
1335 but more useful than an error. Do the symtabs first, then check
1336 the psymtabs. If a psymtab indicates the existence of the
1337 desired name as a file-level static, then do psymtab-to-symtab
1338 conversion on the fly and return the found symbol. */
1340 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1344 sym
= lookup_symbol_aux_psymtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1351 /* Check to see if the symbol is defined in BLOCK or its superiors.
1352 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1354 static struct symbol
*
1355 lookup_symbol_aux_local (const char *name
, const char *linkage_name
,
1356 const struct block
*block
,
1357 const domain_enum domain
)
1360 const struct block
*static_block
= block_static_block (block
);
1362 /* Check if either no block is specified or it's a global block. */
1364 if (static_block
== NULL
)
1367 while (block
!= static_block
)
1369 sym
= lookup_symbol_aux_block (name
, linkage_name
, block
, domain
);
1372 block
= BLOCK_SUPERBLOCK (block
);
1375 /* We've reached the static block without finding a result. */
1380 /* Look up OBJFILE to BLOCK. */
1382 static struct objfile
*
1383 lookup_objfile_from_block (const struct block
*block
)
1385 struct objfile
*obj
;
1391 block
= block_global_block (block
);
1392 /* Go through SYMTABS. */
1393 ALL_SYMTABS (obj
, s
)
1394 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1400 /* Look up a symbol in a block; if found, fixup the symbol, and set
1401 block_found appropriately. */
1404 lookup_symbol_aux_block (const char *name
, const char *linkage_name
,
1405 const struct block
*block
,
1406 const domain_enum domain
)
1410 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1413 block_found
= block
;
1414 return fixup_symbol_section (sym
, NULL
);
1420 /* Check all global symbols in OBJFILE in symtabs and
1424 lookup_global_symbol_from_objfile (const struct objfile
*objfile
,
1426 const char *linkage_name
,
1427 const domain_enum domain
)
1430 struct blockvector
*bv
;
1431 const struct block
*block
;
1433 struct partial_symtab
*ps
;
1435 /* Go through symtabs. */
1436 ALL_OBJFILE_SYMTABS (objfile
, s
)
1438 bv
= BLOCKVECTOR (s
);
1439 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1440 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1443 block_found
= block
;
1444 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1448 /* Now go through psymtabs. */
1449 ALL_OBJFILE_PSYMTABS (objfile
, ps
)
1452 && lookup_partial_symbol (ps
, name
, linkage_name
,
1455 s
= PSYMTAB_TO_SYMTAB (ps
);
1456 bv
= BLOCKVECTOR (s
);
1457 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1458 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1459 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1463 if (objfile
->separate_debug_objfile
)
1464 return lookup_global_symbol_from_objfile (objfile
->separate_debug_objfile
,
1465 name
, linkage_name
, domain
);
1470 /* Check to see if the symbol is defined in one of the symtabs.
1471 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1472 depending on whether or not we want to search global symbols or
1475 static struct symbol
*
1476 lookup_symbol_aux_symtabs (int block_index
,
1477 const char *name
, const char *linkage_name
,
1478 const domain_enum domain
)
1481 struct objfile
*objfile
;
1482 struct blockvector
*bv
;
1483 const struct block
*block
;
1486 ALL_PRIMARY_SYMTABS (objfile
, s
)
1488 bv
= BLOCKVECTOR (s
);
1489 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1490 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1493 block_found
= block
;
1494 return fixup_symbol_section (sym
, objfile
);
1501 /* Check to see if the symbol is defined in one of the partial
1502 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1503 STATIC_BLOCK, depending on whether or not we want to search global
1504 symbols or static symbols. */
1506 static struct symbol
*
1507 lookup_symbol_aux_psymtabs (int block_index
, const char *name
,
1508 const char *linkage_name
,
1509 const domain_enum domain
)
1512 struct objfile
*objfile
;
1513 struct blockvector
*bv
;
1514 const struct block
*block
;
1515 struct partial_symtab
*ps
;
1517 const int psymtab_index
= (block_index
== GLOBAL_BLOCK
? 1 : 0);
1519 ALL_PSYMTABS (objfile
, ps
)
1522 && lookup_partial_symbol (ps
, name
, linkage_name
,
1523 psymtab_index
, domain
))
1525 s
= PSYMTAB_TO_SYMTAB (ps
);
1526 bv
= BLOCKVECTOR (s
);
1527 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1528 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1531 /* This shouldn't be necessary, but as a last resort try
1532 looking in the statics even though the psymtab claimed
1533 the symbol was global, or vice-versa. It's possible
1534 that the psymtab gets it wrong in some cases. */
1536 /* FIXME: carlton/2002-09-30: Should we really do that?
1537 If that happens, isn't it likely to be a GDB error, in
1538 which case we should fix the GDB error rather than
1539 silently dealing with it here? So I'd vote for
1540 removing the check for the symbol in the other
1542 block
= BLOCKVECTOR_BLOCK (bv
,
1543 block_index
== GLOBAL_BLOCK
?
1544 STATIC_BLOCK
: GLOBAL_BLOCK
);
1545 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1547 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>)."),
1548 block_index
== GLOBAL_BLOCK
? "global" : "static",
1549 name
, ps
->filename
, name
, name
);
1551 return fixup_symbol_section (sym
, objfile
);
1558 /* A default version of lookup_symbol_nonlocal for use by languages
1559 that can't think of anything better to do. This implements the C
1563 basic_lookup_symbol_nonlocal (const char *name
,
1564 const char *linkage_name
,
1565 const struct block
*block
,
1566 const domain_enum domain
)
1570 /* NOTE: carlton/2003-05-19: The comments below were written when
1571 this (or what turned into this) was part of lookup_symbol_aux;
1572 I'm much less worried about these questions now, since these
1573 decisions have turned out well, but I leave these comments here
1576 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1577 not it would be appropriate to search the current global block
1578 here as well. (That's what this code used to do before the
1579 is_a_field_of_this check was moved up.) On the one hand, it's
1580 redundant with the lookup_symbol_aux_symtabs search that happens
1581 next. On the other hand, if decode_line_1 is passed an argument
1582 like filename:var, then the user presumably wants 'var' to be
1583 searched for in filename. On the third hand, there shouldn't be
1584 multiple global variables all of which are named 'var', and it's
1585 not like decode_line_1 has ever restricted its search to only
1586 global variables in a single filename. All in all, only
1587 searching the static block here seems best: it's correct and it's
1590 /* NOTE: carlton/2002-12-05: There's also a possible performance
1591 issue here: if you usually search for global symbols in the
1592 current file, then it would be slightly better to search the
1593 current global block before searching all the symtabs. But there
1594 are other factors that have a much greater effect on performance
1595 than that one, so I don't think we should worry about that for
1598 sym
= lookup_symbol_static (name
, linkage_name
, block
, domain
);
1602 return lookup_symbol_global (name
, linkage_name
, block
, domain
);
1605 /* Lookup a symbol in the static block associated to BLOCK, if there
1606 is one; do nothing if BLOCK is NULL or a global block. */
1609 lookup_symbol_static (const char *name
,
1610 const char *linkage_name
,
1611 const struct block
*block
,
1612 const domain_enum domain
)
1614 const struct block
*static_block
= block_static_block (block
);
1616 if (static_block
!= NULL
)
1617 return lookup_symbol_aux_block (name
, linkage_name
, static_block
, domain
);
1622 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1626 lookup_symbol_global (const char *name
,
1627 const char *linkage_name
,
1628 const struct block
*block
,
1629 const domain_enum domain
)
1631 struct symbol
*sym
= NULL
;
1632 struct objfile
*objfile
= NULL
;
1634 /* Call library-specific lookup procedure. */
1635 objfile
= lookup_objfile_from_block (block
);
1636 if (objfile
!= NULL
)
1637 sym
= solib_global_lookup (objfile
, name
, linkage_name
, domain
);
1641 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1645 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1649 symbol_matches_domain (enum language symbol_language
,
1650 domain_enum symbol_domain
,
1653 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1654 A Java class declaration also defines a typedef for the class.
1655 Similarly, any Ada type declaration implicitly defines a typedef. */
1656 if (symbol_language
== language_cplus
1657 || symbol_language
== language_java
1658 || symbol_language
== language_ada
)
1660 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1661 && symbol_domain
== STRUCT_DOMAIN
)
1664 /* For all other languages, strict match is required. */
1665 return (symbol_domain
== domain
);
1668 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1669 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1670 linkage name matches it. Check the global symbols if GLOBAL, the
1671 static symbols if not */
1673 struct partial_symbol
*
1674 lookup_partial_symbol (struct partial_symtab
*pst
, const char *name
,
1675 const char *linkage_name
, int global
,
1678 struct partial_symbol
*temp
;
1679 struct partial_symbol
**start
, **psym
;
1680 struct partial_symbol
**top
, **real_top
, **bottom
, **center
;
1681 int length
= (global
? pst
->n_global_syms
: pst
->n_static_syms
);
1682 int do_linear_search
= 1;
1689 pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
:
1690 pst
->objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1692 if (global
) /* This means we can use a binary search. */
1694 do_linear_search
= 0;
1696 /* Binary search. This search is guaranteed to end with center
1697 pointing at the earliest partial symbol whose name might be
1698 correct. At that point *all* partial symbols with an
1699 appropriate name will be checked against the correct
1703 top
= start
+ length
- 1;
1705 while (top
> bottom
)
1707 center
= bottom
+ (top
- bottom
) / 2;
1708 if (!(center
< top
))
1709 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1710 if (!do_linear_search
1711 && (SYMBOL_LANGUAGE (*center
) == language_java
))
1713 do_linear_search
= 1;
1715 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center
), name
) >= 0)
1721 bottom
= center
+ 1;
1724 if (!(top
== bottom
))
1725 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1727 while (top
<= real_top
1728 && (linkage_name
!= NULL
1729 ? strcmp (SYMBOL_LINKAGE_NAME (*top
), linkage_name
) == 0
1730 : SYMBOL_MATCHES_SEARCH_NAME (*top
,name
)))
1732 if (symbol_matches_domain (SYMBOL_LANGUAGE (*top
),
1733 SYMBOL_DOMAIN (*top
), domain
))
1739 /* Can't use a binary search or else we found during the binary search that
1740 we should also do a linear search. */
1742 if (do_linear_search
)
1744 for (psym
= start
; psym
< start
+ length
; psym
++)
1746 if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym
),
1747 SYMBOL_DOMAIN (*psym
), domain
))
1749 if (linkage_name
!= NULL
1750 ? strcmp (SYMBOL_LINKAGE_NAME (*psym
), linkage_name
) == 0
1751 : SYMBOL_MATCHES_SEARCH_NAME (*psym
, name
))
1762 /* Look up a type named NAME in the struct_domain. The type returned
1763 must not be opaque -- i.e., must have at least one field
1767 lookup_transparent_type (const char *name
)
1769 return current_language
->la_lookup_transparent_type (name
);
1772 /* The standard implementation of lookup_transparent_type. This code
1773 was modeled on lookup_symbol -- the parts not relevant to looking
1774 up types were just left out. In particular it's assumed here that
1775 types are available in struct_domain and only at file-static or
1779 basic_lookup_transparent_type (const char *name
)
1782 struct symtab
*s
= NULL
;
1783 struct partial_symtab
*ps
;
1784 struct blockvector
*bv
;
1785 struct objfile
*objfile
;
1786 struct block
*block
;
1788 /* Now search all the global symbols. Do the symtab's first, then
1789 check the psymtab's. If a psymtab indicates the existence
1790 of the desired name as a global, then do psymtab-to-symtab
1791 conversion on the fly and return the found symbol. */
1793 ALL_PRIMARY_SYMTABS (objfile
, s
)
1795 bv
= BLOCKVECTOR (s
);
1796 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1797 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1798 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1800 return SYMBOL_TYPE (sym
);
1804 ALL_PSYMTABS (objfile
, ps
)
1806 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
,
1809 s
= PSYMTAB_TO_SYMTAB (ps
);
1810 bv
= BLOCKVECTOR (s
);
1811 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1812 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1815 /* This shouldn't be necessary, but as a last resort
1816 * try looking in the statics even though the psymtab
1817 * claimed the symbol was global. It's possible that
1818 * the psymtab gets it wrong in some cases.
1820 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1821 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1823 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1824 %s may be an inlined function, or may be a template function\n\
1825 (if a template, try specifying an instantiation: %s<type>)."),
1826 name
, ps
->filename
, name
, name
);
1828 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1829 return SYMBOL_TYPE (sym
);
1833 /* Now search the static file-level symbols.
1834 Not strictly correct, but more useful than an error.
1835 Do the symtab's first, then
1836 check the psymtab's. If a psymtab indicates the existence
1837 of the desired name as a file-level static, then do psymtab-to-symtab
1838 conversion on the fly and return the found symbol.
1841 ALL_PRIMARY_SYMTABS (objfile
, s
)
1843 bv
= BLOCKVECTOR (s
);
1844 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1845 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1846 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1848 return SYMBOL_TYPE (sym
);
1852 ALL_PSYMTABS (objfile
, ps
)
1854 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
, 0, STRUCT_DOMAIN
))
1856 s
= PSYMTAB_TO_SYMTAB (ps
);
1857 bv
= BLOCKVECTOR (s
);
1858 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1859 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1862 /* This shouldn't be necessary, but as a last resort
1863 * try looking in the globals even though the psymtab
1864 * claimed the symbol was static. It's possible that
1865 * the psymtab gets it wrong in some cases.
1867 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1868 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1870 error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1871 %s may be an inlined function, or may be a template function\n\
1872 (if a template, try specifying an instantiation: %s<type>)."),
1873 name
, ps
->filename
, name
, name
);
1875 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1876 return SYMBOL_TYPE (sym
);
1879 return (struct type
*) 0;
1883 /* Find the psymtab containing main(). */
1884 /* FIXME: What about languages without main() or specially linked
1885 executables that have no main() ? */
1887 struct partial_symtab
*
1888 find_main_psymtab (void)
1890 struct partial_symtab
*pst
;
1891 struct objfile
*objfile
;
1893 ALL_PSYMTABS (objfile
, pst
)
1895 if (lookup_partial_symbol (pst
, main_name (), NULL
, 1, VAR_DOMAIN
))
1903 /* Search BLOCK for symbol NAME in DOMAIN.
1905 Note that if NAME is the demangled form of a C++ symbol, we will fail
1906 to find a match during the binary search of the non-encoded names, but
1907 for now we don't worry about the slight inefficiency of looking for
1908 a match we'll never find, since it will go pretty quick. Once the
1909 binary search terminates, we drop through and do a straight linear
1910 search on the symbols. Each symbol which is marked as being a ObjC/C++
1911 symbol (language_cplus or language_objc set) has both the encoded and
1912 non-encoded names tested for a match.
1914 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1915 particular mangled name.
1919 lookup_block_symbol (const struct block
*block
, const char *name
,
1920 const char *linkage_name
,
1921 const domain_enum domain
)
1923 struct dict_iterator iter
;
1926 if (!BLOCK_FUNCTION (block
))
1928 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1930 sym
= dict_iter_name_next (name
, &iter
))
1932 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1933 SYMBOL_DOMAIN (sym
), domain
)
1934 && (linkage_name
!= NULL
1935 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1942 /* Note that parameter symbols do not always show up last in the
1943 list; this loop makes sure to take anything else other than
1944 parameter symbols first; it only uses parameter symbols as a
1945 last resort. Note that this only takes up extra computation
1948 struct symbol
*sym_found
= NULL
;
1950 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1952 sym
= dict_iter_name_next (name
, &iter
))
1954 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1955 SYMBOL_DOMAIN (sym
), domain
)
1956 && (linkage_name
!= NULL
1957 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1960 if (SYMBOL_CLASS (sym
) != LOC_ARG
&&
1961 SYMBOL_CLASS (sym
) != LOC_LOCAL_ARG
&&
1962 SYMBOL_CLASS (sym
) != LOC_REF_ARG
&&
1963 SYMBOL_CLASS (sym
) != LOC_REGPARM
&&
1964 SYMBOL_CLASS (sym
) != LOC_REGPARM_ADDR
&&
1965 SYMBOL_CLASS (sym
) != LOC_BASEREG_ARG
&&
1966 SYMBOL_CLASS (sym
) != LOC_COMPUTED_ARG
)
1972 return (sym_found
); /* Will be NULL if not found. */
1976 /* Find the symtab associated with PC and SECTION. Look through the
1977 psymtabs and read in another symtab if necessary. */
1980 find_pc_sect_symtab (CORE_ADDR pc
, asection
*section
)
1983 struct blockvector
*bv
;
1984 struct symtab
*s
= NULL
;
1985 struct symtab
*best_s
= NULL
;
1986 struct partial_symtab
*ps
;
1987 struct objfile
*objfile
;
1988 CORE_ADDR distance
= 0;
1989 struct minimal_symbol
*msymbol
;
1991 /* If we know that this is not a text address, return failure. This is
1992 necessary because we loop based on the block's high and low code
1993 addresses, which do not include the data ranges, and because
1994 we call find_pc_sect_psymtab which has a similar restriction based
1995 on the partial_symtab's texthigh and textlow. */
1996 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1998 && (msymbol
->type
== mst_data
1999 || msymbol
->type
== mst_bss
2000 || msymbol
->type
== mst_abs
2001 || msymbol
->type
== mst_file_data
2002 || msymbol
->type
== mst_file_bss
))
2005 /* Search all symtabs for the one whose file contains our address, and which
2006 is the smallest of all the ones containing the address. This is designed
2007 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2008 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2009 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2011 This happens for native ecoff format, where code from included files
2012 gets its own symtab. The symtab for the included file should have
2013 been read in already via the dependency mechanism.
2014 It might be swifter to create several symtabs with the same name
2015 like xcoff does (I'm not sure).
2017 It also happens for objfiles that have their functions reordered.
2018 For these, the symtab we are looking for is not necessarily read in. */
2020 ALL_PRIMARY_SYMTABS (objfile
, s
)
2022 bv
= BLOCKVECTOR (s
);
2023 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2025 if (BLOCK_START (b
) <= pc
2026 && BLOCK_END (b
) > pc
2028 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2030 /* For an objfile that has its functions reordered,
2031 find_pc_psymtab will find the proper partial symbol table
2032 and we simply return its corresponding symtab. */
2033 /* In order to better support objfiles that contain both
2034 stabs and coff debugging info, we continue on if a psymtab
2036 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->psymtabs
)
2038 ps
= find_pc_sect_psymtab (pc
, section
);
2040 return PSYMTAB_TO_SYMTAB (ps
);
2044 struct dict_iterator iter
;
2045 struct symbol
*sym
= NULL
;
2047 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2049 fixup_symbol_section (sym
, objfile
);
2050 if (matching_bfd_sections (SYMBOL_BFD_SECTION (sym
), section
))
2054 continue; /* no symbol in this symtab matches section */
2056 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2065 ps
= find_pc_sect_psymtab (pc
, section
);
2069 /* Might want to error() here (in case symtab is corrupt and
2070 will cause a core dump), but maybe we can successfully
2071 continue, so let's not. */
2073 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n"),
2075 s
= PSYMTAB_TO_SYMTAB (ps
);
2080 /* Find the symtab associated with PC. Look through the psymtabs and
2081 read in another symtab if necessary. Backward compatibility, no section */
2084 find_pc_symtab (CORE_ADDR pc
)
2086 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2090 /* Find the source file and line number for a given PC value and SECTION.
2091 Return a structure containing a symtab pointer, a line number,
2092 and a pc range for the entire source line.
2093 The value's .pc field is NOT the specified pc.
2094 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2095 use the line that ends there. Otherwise, in that case, the line
2096 that begins there is used. */
2098 /* The big complication here is that a line may start in one file, and end just
2099 before the start of another file. This usually occurs when you #include
2100 code in the middle of a subroutine. To properly find the end of a line's PC
2101 range, we must search all symtabs associated with this compilation unit, and
2102 find the one whose first PC is closer than that of the next line in this
2105 /* If it's worth the effort, we could be using a binary search. */
2107 struct symtab_and_line
2108 find_pc_sect_line (CORE_ADDR pc
, struct bfd_section
*section
, int notcurrent
)
2111 struct linetable
*l
;
2114 struct linetable_entry
*item
;
2115 struct symtab_and_line val
;
2116 struct blockvector
*bv
;
2117 struct minimal_symbol
*msymbol
;
2118 struct minimal_symbol
*mfunsym
;
2120 /* Info on best line seen so far, and where it starts, and its file. */
2122 struct linetable_entry
*best
= NULL
;
2123 CORE_ADDR best_end
= 0;
2124 struct symtab
*best_symtab
= 0;
2126 /* Store here the first line number
2127 of a file which contains the line at the smallest pc after PC.
2128 If we don't find a line whose range contains PC,
2129 we will use a line one less than this,
2130 with a range from the start of that file to the first line's pc. */
2131 struct linetable_entry
*alt
= NULL
;
2132 struct symtab
*alt_symtab
= 0;
2134 /* Info on best line seen in this file. */
2136 struct linetable_entry
*prev
;
2138 /* If this pc is not from the current frame,
2139 it is the address of the end of a call instruction.
2140 Quite likely that is the start of the following statement.
2141 But what we want is the statement containing the instruction.
2142 Fudge the pc to make sure we get that. */
2144 init_sal (&val
); /* initialize to zeroes */
2146 /* It's tempting to assume that, if we can't find debugging info for
2147 any function enclosing PC, that we shouldn't search for line
2148 number info, either. However, GAS can emit line number info for
2149 assembly files --- very helpful when debugging hand-written
2150 assembly code. In such a case, we'd have no debug info for the
2151 function, but we would have line info. */
2156 /* elz: added this because this function returned the wrong
2157 information if the pc belongs to a stub (import/export)
2158 to call a shlib function. This stub would be anywhere between
2159 two functions in the target, and the line info was erroneously
2160 taken to be the one of the line before the pc.
2162 /* RT: Further explanation:
2164 * We have stubs (trampolines) inserted between procedures.
2166 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2167 * exists in the main image.
2169 * In the minimal symbol table, we have a bunch of symbols
2170 * sorted by start address. The stubs are marked as "trampoline",
2171 * the others appear as text. E.g.:
2173 * Minimal symbol table for main image
2174 * main: code for main (text symbol)
2175 * shr1: stub (trampoline symbol)
2176 * foo: code for foo (text symbol)
2178 * Minimal symbol table for "shr1" image:
2180 * shr1: code for shr1 (text symbol)
2183 * So the code below is trying to detect if we are in the stub
2184 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2185 * and if found, do the symbolization from the real-code address
2186 * rather than the stub address.
2188 * Assumptions being made about the minimal symbol table:
2189 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2190 * if we're really in the trampoline. If we're beyond it (say
2191 * we're in "foo" in the above example), it'll have a closer
2192 * symbol (the "foo" text symbol for example) and will not
2193 * return the trampoline.
2194 * 2. lookup_minimal_symbol_text() will find a real text symbol
2195 * corresponding to the trampoline, and whose address will
2196 * be different than the trampoline address. I put in a sanity
2197 * check for the address being the same, to avoid an
2198 * infinite recursion.
2200 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2201 if (msymbol
!= NULL
)
2202 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2204 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2206 if (mfunsym
== NULL
)
2207 /* I eliminated this warning since it is coming out
2208 * in the following situation:
2209 * gdb shmain // test program with shared libraries
2210 * (gdb) break shr1 // function in shared lib
2211 * Warning: In stub for ...
2212 * In the above situation, the shared lib is not loaded yet,
2213 * so of course we can't find the real func/line info,
2214 * but the "break" still works, and the warning is annoying.
2215 * So I commented out the warning. RT */
2216 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2218 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
2219 /* Avoid infinite recursion */
2220 /* See above comment about why warning is commented out */
2221 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2224 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2228 s
= find_pc_sect_symtab (pc
, section
);
2231 /* if no symbol information, return previous pc */
2238 bv
= BLOCKVECTOR (s
);
2240 /* Look at all the symtabs that share this blockvector.
2241 They all have the same apriori range, that we found was right;
2242 but they have different line tables. */
2244 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2246 /* Find the best line in this symtab. */
2253 /* I think len can be zero if the symtab lacks line numbers
2254 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2255 I'm not sure which, and maybe it depends on the symbol
2261 item
= l
->item
; /* Get first line info */
2263 /* Is this file's first line closer than the first lines of other files?
2264 If so, record this file, and its first line, as best alternate. */
2265 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2271 for (i
= 0; i
< len
; i
++, item
++)
2273 /* Leave prev pointing to the linetable entry for the last line
2274 that started at or before PC. */
2281 /* At this point, prev points at the line whose start addr is <= pc, and
2282 item points at the next line. If we ran off the end of the linetable
2283 (pc >= start of the last line), then prev == item. If pc < start of
2284 the first line, prev will not be set. */
2286 /* Is this file's best line closer than the best in the other files?
2287 If so, record this file, and its best line, as best so far. Don't
2288 save prev if it represents the end of a function (i.e. line number
2289 0) instead of a real line. */
2291 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2296 /* Discard BEST_END if it's before the PC of the current BEST. */
2297 if (best_end
<= best
->pc
)
2301 /* If another line (denoted by ITEM) is in the linetable and its
2302 PC is after BEST's PC, but before the current BEST_END, then
2303 use ITEM's PC as the new best_end. */
2304 if (best
&& i
< len
&& item
->pc
> best
->pc
2305 && (best_end
== 0 || best_end
> item
->pc
))
2306 best_end
= item
->pc
;
2311 /* If we didn't find any line number info, just return zeros.
2312 We used to return alt->line - 1 here, but that could be
2313 anywhere; if we don't have line number info for this PC,
2314 don't make some up. */
2317 else if (best
->line
== 0)
2319 /* If our best fit is in a range of PC's for which no line
2320 number info is available (line number is zero) then we didn't
2321 find any valid line information. */
2326 val
.symtab
= best_symtab
;
2327 val
.line
= best
->line
;
2329 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2334 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2336 val
.section
= section
;
2340 /* Backward compatibility (no section) */
2342 struct symtab_and_line
2343 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2347 section
= find_pc_overlay (pc
);
2348 if (pc_in_unmapped_range (pc
, section
))
2349 pc
= overlay_mapped_address (pc
, section
);
2350 return find_pc_sect_line (pc
, section
, notcurrent
);
2353 /* Find line number LINE in any symtab whose name is the same as
2356 If found, return the symtab that contains the linetable in which it was
2357 found, set *INDEX to the index in the linetable of the best entry
2358 found, and set *EXACT_MATCH nonzero if the value returned is an
2361 If not found, return NULL. */
2364 find_line_symtab (struct symtab
*symtab
, int line
, int *index
, int *exact_match
)
2368 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2372 struct linetable
*best_linetable
;
2373 struct symtab
*best_symtab
;
2375 /* First try looking it up in the given symtab. */
2376 best_linetable
= LINETABLE (symtab
);
2377 best_symtab
= symtab
;
2378 best_index
= find_line_common (best_linetable
, line
, &exact
);
2379 if (best_index
< 0 || !exact
)
2381 /* Didn't find an exact match. So we better keep looking for
2382 another symtab with the same name. In the case of xcoff,
2383 multiple csects for one source file (produced by IBM's FORTRAN
2384 compiler) produce multiple symtabs (this is unavoidable
2385 assuming csects can be at arbitrary places in memory and that
2386 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2388 /* BEST is the smallest linenumber > LINE so far seen,
2389 or 0 if none has been seen so far.
2390 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2393 struct objfile
*objfile
;
2395 struct partial_symtab
*p
;
2397 if (best_index
>= 0)
2398 best
= best_linetable
->item
[best_index
].line
;
2402 ALL_PSYMTABS (objfile
, p
)
2404 if (strcmp (symtab
->filename
, p
->filename
) != 0)
2406 PSYMTAB_TO_SYMTAB (p
);
2409 ALL_SYMTABS (objfile
, s
)
2411 struct linetable
*l
;
2414 if (strcmp (symtab
->filename
, s
->filename
) != 0)
2417 ind
= find_line_common (l
, line
, &exact
);
2427 if (best
== 0 || l
->item
[ind
].line
< best
)
2429 best
= l
->item
[ind
].line
;
2442 *index
= best_index
;
2444 *exact_match
= exact
;
2449 /* Set the PC value for a given source file and line number and return true.
2450 Returns zero for invalid line number (and sets the PC to 0).
2451 The source file is specified with a struct symtab. */
2454 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2456 struct linetable
*l
;
2463 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2466 l
= LINETABLE (symtab
);
2467 *pc
= l
->item
[ind
].pc
;
2474 /* Find the range of pc values in a line.
2475 Store the starting pc of the line into *STARTPTR
2476 and the ending pc (start of next line) into *ENDPTR.
2477 Returns 1 to indicate success.
2478 Returns 0 if could not find the specified line. */
2481 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2484 CORE_ADDR startaddr
;
2485 struct symtab_and_line found_sal
;
2488 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2491 /* This whole function is based on address. For example, if line 10 has
2492 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2493 "info line *0x123" should say the line goes from 0x100 to 0x200
2494 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2495 This also insures that we never give a range like "starts at 0x134
2496 and ends at 0x12c". */
2498 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2499 if (found_sal
.line
!= sal
.line
)
2501 /* The specified line (sal) has zero bytes. */
2502 *startptr
= found_sal
.pc
;
2503 *endptr
= found_sal
.pc
;
2507 *startptr
= found_sal
.pc
;
2508 *endptr
= found_sal
.end
;
2513 /* Given a line table and a line number, return the index into the line
2514 table for the pc of the nearest line whose number is >= the specified one.
2515 Return -1 if none is found. The value is >= 0 if it is an index.
2517 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2520 find_line_common (struct linetable
*l
, int lineno
,
2526 /* BEST is the smallest linenumber > LINENO so far seen,
2527 or 0 if none has been seen so far.
2528 BEST_INDEX identifies the item for it. */
2530 int best_index
= -1;
2541 for (i
= 0; i
< len
; i
++)
2543 struct linetable_entry
*item
= &(l
->item
[i
]);
2545 if (item
->line
== lineno
)
2547 /* Return the first (lowest address) entry which matches. */
2552 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2559 /* If we got here, we didn't get an exact match. */
2564 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2566 struct symtab_and_line sal
;
2567 sal
= find_pc_line (pc
, 0);
2570 return sal
.symtab
!= 0;
2573 /* Given a function start address PC and SECTION, find the first
2574 address after the function prologue. */
2576 find_function_start_pc (struct gdbarch
*gdbarch
,
2577 CORE_ADDR pc
, asection
*section
)
2579 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2580 so that gdbarch_skip_prologue has something unique to work on. */
2581 if (section_is_overlay (section
) && !section_is_mapped (section
))
2582 pc
= overlay_unmapped_address (pc
, section
);
2584 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2585 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2587 /* For overlays, map pc back into its mapped VMA range. */
2588 pc
= overlay_mapped_address (pc
, section
);
2593 /* Given a function symbol SYM, find the symtab and line for the start
2595 If the argument FUNFIRSTLINE is nonzero, we want the first line
2596 of real code inside the function. */
2598 struct symtab_and_line
2599 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2601 struct block
*block
= SYMBOL_BLOCK_VALUE (sym
);
2602 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2603 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2606 struct symtab_and_line sal
;
2608 pc
= BLOCK_START (block
);
2609 fixup_symbol_section (sym
, objfile
);
2612 /* Skip "first line" of function (which is actually its prologue). */
2613 pc
= find_function_start_pc (gdbarch
, pc
, SYMBOL_BFD_SECTION (sym
));
2615 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2617 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2618 line is still part of the same function. */
2620 && BLOCK_START (block
) <= sal
.end
2621 && sal
.end
< BLOCK_END (block
))
2623 /* First pc of next line */
2625 /* Recalculate the line number (might not be N+1). */
2626 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2633 /* If P is of the form "operator[ \t]+..." where `...' is
2634 some legitimate operator text, return a pointer to the
2635 beginning of the substring of the operator text.
2636 Otherwise, return "". */
2638 operator_chars (char *p
, char **end
)
2641 if (strncmp (p
, "operator", 8))
2645 /* Don't get faked out by `operator' being part of a longer
2647 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2650 /* Allow some whitespace between `operator' and the operator symbol. */
2651 while (*p
== ' ' || *p
== '\t')
2654 /* Recognize 'operator TYPENAME'. */
2656 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2659 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2668 case '\\': /* regexp quoting */
2671 if (p
[2] == '=') /* 'operator\*=' */
2673 else /* 'operator\*' */
2677 else if (p
[1] == '[')
2680 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2681 else if (p
[2] == '\\' && p
[3] == ']')
2683 *end
= p
+ 4; /* 'operator\[\]' */
2687 error (_("nothing is allowed between '[' and ']'"));
2691 /* Gratuitous qoute: skip it and move on. */
2713 if (p
[0] == '-' && p
[1] == '>')
2715 /* Struct pointer member operator 'operator->'. */
2718 *end
= p
+ 3; /* 'operator->*' */
2721 else if (p
[2] == '\\')
2723 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2728 *end
= p
+ 2; /* 'operator->' */
2732 if (p
[1] == '=' || p
[1] == p
[0])
2743 error (_("`operator ()' must be specified without whitespace in `()'"));
2748 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2753 error (_("`operator []' must be specified without whitespace in `[]'"));
2757 error (_("`operator %s' not supported"), p
);
2766 /* If FILE is not already in the table of files, return zero;
2767 otherwise return non-zero. Optionally add FILE to the table if ADD
2768 is non-zero. If *FIRST is non-zero, forget the old table
2771 filename_seen (const char *file
, int add
, int *first
)
2773 /* Table of files seen so far. */
2774 static const char **tab
= NULL
;
2775 /* Allocated size of tab in elements.
2776 Start with one 256-byte block (when using GNU malloc.c).
2777 24 is the malloc overhead when range checking is in effect. */
2778 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2779 /* Current size of tab in elements. */
2780 static int tab_cur_size
;
2786 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2790 /* Is FILE in tab? */
2791 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2792 if (strcmp (*p
, file
) == 0)
2795 /* No; maybe add it to tab. */
2798 if (tab_cur_size
== tab_alloc_size
)
2800 tab_alloc_size
*= 2;
2801 tab
= (const char **) xrealloc ((char *) tab
,
2802 tab_alloc_size
* sizeof (*tab
));
2804 tab
[tab_cur_size
++] = file
;
2810 /* Slave routine for sources_info. Force line breaks at ,'s.
2811 NAME is the name to print and *FIRST is nonzero if this is the first
2812 name printed. Set *FIRST to zero. */
2814 output_source_filename (const char *name
, int *first
)
2816 /* Since a single source file can result in several partial symbol
2817 tables, we need to avoid printing it more than once. Note: if
2818 some of the psymtabs are read in and some are not, it gets
2819 printed both under "Source files for which symbols have been
2820 read" and "Source files for which symbols will be read in on
2821 demand". I consider this a reasonable way to deal with the
2822 situation. I'm not sure whether this can also happen for
2823 symtabs; it doesn't hurt to check. */
2825 /* Was NAME already seen? */
2826 if (filename_seen (name
, 1, first
))
2828 /* Yes; don't print it again. */
2831 /* No; print it and reset *FIRST. */
2838 printf_filtered (", ");
2842 fputs_filtered (name
, gdb_stdout
);
2846 sources_info (char *ignore
, int from_tty
)
2849 struct partial_symtab
*ps
;
2850 struct objfile
*objfile
;
2853 if (!have_full_symbols () && !have_partial_symbols ())
2855 error (_("No symbol table is loaded. Use the \"file\" command."));
2858 printf_filtered ("Source files for which symbols have been read in:\n\n");
2861 ALL_SYMTABS (objfile
, s
)
2863 const char *fullname
= symtab_to_fullname (s
);
2864 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2866 printf_filtered ("\n\n");
2868 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2871 ALL_PSYMTABS (objfile
, ps
)
2875 const char *fullname
= psymtab_to_fullname (ps
);
2876 output_source_filename (fullname
? fullname
: ps
->filename
, &first
);
2879 printf_filtered ("\n");
2883 file_matches (char *file
, char *files
[], int nfiles
)
2887 if (file
!= NULL
&& nfiles
!= 0)
2889 for (i
= 0; i
< nfiles
; i
++)
2891 if (strcmp (files
[i
], lbasename (file
)) == 0)
2895 else if (nfiles
== 0)
2900 /* Free any memory associated with a search. */
2902 free_search_symbols (struct symbol_search
*symbols
)
2904 struct symbol_search
*p
;
2905 struct symbol_search
*next
;
2907 for (p
= symbols
; p
!= NULL
; p
= next
)
2915 do_free_search_symbols_cleanup (void *symbols
)
2917 free_search_symbols (symbols
);
2921 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2923 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2926 /* Helper function for sort_search_symbols and qsort. Can only
2927 sort symbols, not minimal symbols. */
2929 compare_search_syms (const void *sa
, const void *sb
)
2931 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2932 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2934 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2935 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2938 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2939 prevtail where it is, but update its next pointer to point to
2940 the first of the sorted symbols. */
2941 static struct symbol_search
*
2942 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2944 struct symbol_search
**symbols
, *symp
, *old_next
;
2947 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2949 symp
= prevtail
->next
;
2950 for (i
= 0; i
< nfound
; i
++)
2955 /* Generally NULL. */
2958 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2959 compare_search_syms
);
2962 for (i
= 0; i
< nfound
; i
++)
2964 symp
->next
= symbols
[i
];
2967 symp
->next
= old_next
;
2973 /* Search the symbol table for matches to the regular expression REGEXP,
2974 returning the results in *MATCHES.
2976 Only symbols of KIND are searched:
2977 FUNCTIONS_DOMAIN - search all functions
2978 TYPES_DOMAIN - search all type names
2979 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2980 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2981 and constants (enums)
2983 free_search_symbols should be called when *MATCHES is no longer needed.
2985 The results are sorted locally; each symtab's global and static blocks are
2986 separately alphabetized.
2989 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
2990 struct symbol_search
**matches
)
2993 struct partial_symtab
*ps
;
2994 struct blockvector
*bv
;
2997 struct dict_iterator iter
;
2999 struct partial_symbol
**psym
;
3000 struct objfile
*objfile
;
3001 struct minimal_symbol
*msymbol
;
3004 static enum minimal_symbol_type types
[]
3006 {mst_data
, mst_text
, mst_abs
, mst_unknown
};
3007 static enum minimal_symbol_type types2
[]
3009 {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
3010 static enum minimal_symbol_type types3
[]
3012 {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
3013 static enum minimal_symbol_type types4
[]
3015 {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
3016 enum minimal_symbol_type ourtype
;
3017 enum minimal_symbol_type ourtype2
;
3018 enum minimal_symbol_type ourtype3
;
3019 enum minimal_symbol_type ourtype4
;
3020 struct symbol_search
*sr
;
3021 struct symbol_search
*psr
;
3022 struct symbol_search
*tail
;
3023 struct cleanup
*old_chain
= NULL
;
3025 if (kind
< VARIABLES_DOMAIN
)
3026 error (_("must search on specific domain"));
3028 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3029 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3030 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3031 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3033 sr
= *matches
= NULL
;
3038 /* Make sure spacing is right for C++ operators.
3039 This is just a courtesy to make the matching less sensitive
3040 to how many spaces the user leaves between 'operator'
3041 and <TYPENAME> or <OPERATOR>. */
3043 char *opname
= operator_chars (regexp
, &opend
);
3046 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
3047 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3049 /* There should 1 space between 'operator' and 'TYPENAME'. */
3050 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3055 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3056 if (opname
[-1] == ' ')
3059 /* If wrong number of spaces, fix it. */
3062 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3063 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3068 if (0 != (val
= re_comp (regexp
)))
3069 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3072 /* Search through the partial symtabs *first* for all symbols
3073 matching the regexp. That way we don't have to reproduce all of
3074 the machinery below. */
3076 ALL_PSYMTABS (objfile
, ps
)
3078 struct partial_symbol
**bound
, **gbound
, **sbound
;
3084 gbound
= objfile
->global_psymbols
.list
+ ps
->globals_offset
+ ps
->n_global_syms
;
3085 sbound
= objfile
->static_psymbols
.list
+ ps
->statics_offset
+ ps
->n_static_syms
;
3088 /* Go through all of the symbols stored in a partial
3089 symtab in one loop. */
3090 psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3095 if (bound
== gbound
&& ps
->n_static_syms
!= 0)
3097 psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3108 /* If it would match (logic taken from loop below)
3109 load the file and go on to the next one. We check the
3110 filename here, but that's a bit bogus: we don't know
3111 what file it really comes from until we have full
3112 symtabs. The symbol might be in a header file included by
3113 this psymtab. This only affects Insight. */
3114 if (file_matches (ps
->filename
, files
, nfiles
)
3116 || re_exec (SYMBOL_NATURAL_NAME (*psym
)) != 0)
3117 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (*psym
) != LOC_TYPEDEF
3118 && SYMBOL_CLASS (*psym
) != LOC_BLOCK
)
3119 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
)
3120 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_TYPEDEF
)
3121 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
))))
3123 PSYMTAB_TO_SYMTAB (ps
);
3131 /* Here, we search through the minimal symbol tables for functions
3132 and variables that match, and force their symbols to be read.
3133 This is in particular necessary for demangled variable names,
3134 which are no longer put into the partial symbol tables.
3135 The symbol will then be found during the scan of symtabs below.
3137 For functions, find_pc_symtab should succeed if we have debug info
3138 for the function, for variables we have to call lookup_symbol
3139 to determine if the variable has debug info.
3140 If the lookup fails, set found_misc so that we will rescan to print
3141 any matching symbols without debug info.
3144 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3146 ALL_MSYMBOLS (objfile
, msymbol
)
3148 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3149 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3150 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3151 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3154 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3156 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3158 /* FIXME: carlton/2003-02-04: Given that the
3159 semantics of lookup_symbol keeps on changing
3160 slightly, it would be a nice idea if we had a
3161 function lookup_symbol_minsym that found the
3162 symbol associated to a given minimal symbol (if
3164 if (kind
== FUNCTIONS_DOMAIN
3165 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3166 (struct block
*) NULL
,
3176 ALL_PRIMARY_SYMTABS (objfile
, s
)
3178 bv
= BLOCKVECTOR (s
);
3179 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3181 struct symbol_search
*prevtail
= tail
;
3183 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3184 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3186 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3189 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3191 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3192 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3193 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3194 && SYMBOL_CLASS (sym
) != LOC_CONST
)
3195 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3196 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3197 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
))))
3200 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3202 psr
->symtab
= real_symtab
;
3204 psr
->msymbol
= NULL
;
3216 if (prevtail
== NULL
)
3218 struct symbol_search dummy
;
3221 tail
= sort_search_symbols (&dummy
, nfound
);
3224 old_chain
= make_cleanup_free_search_symbols (sr
);
3227 tail
= sort_search_symbols (prevtail
, nfound
);
3232 /* If there are no eyes, avoid all contact. I mean, if there are
3233 no debug symbols, then print directly from the msymbol_vector. */
3235 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3237 ALL_MSYMBOLS (objfile
, msymbol
)
3239 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3240 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3241 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3242 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3245 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3247 /* Functions: Look up by address. */
3248 if (kind
!= FUNCTIONS_DOMAIN
||
3249 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3251 /* Variables/Absolutes: Look up by name */
3252 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3253 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3257 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3259 psr
->msymbol
= msymbol
;
3266 old_chain
= make_cleanup_free_search_symbols (sr
);
3280 discard_cleanups (old_chain
);
3283 /* Helper function for symtab_symbol_info, this function uses
3284 the data returned from search_symbols() to print information
3285 regarding the match to gdb_stdout.
3288 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3289 int block
, char *last
)
3291 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3293 fputs_filtered ("\nFile ", gdb_stdout
);
3294 fputs_filtered (s
->filename
, gdb_stdout
);
3295 fputs_filtered (":\n", gdb_stdout
);
3298 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3299 printf_filtered ("static ");
3301 /* Typedef that is not a C++ class */
3302 if (kind
== TYPES_DOMAIN
3303 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3304 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3305 /* variable, func, or typedef-that-is-c++-class */
3306 else if (kind
< TYPES_DOMAIN
||
3307 (kind
== TYPES_DOMAIN
&&
3308 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3310 type_print (SYMBOL_TYPE (sym
),
3311 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3312 ? "" : SYMBOL_PRINT_NAME (sym
)),
3315 printf_filtered (";\n");
3319 /* This help function for symtab_symbol_info() prints information
3320 for non-debugging symbols to gdb_stdout.
3323 print_msymbol_info (struct minimal_symbol
*msymbol
)
3327 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3328 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3329 & (CORE_ADDR
) 0xffffffff,
3332 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3334 printf_filtered ("%s %s\n",
3335 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3338 /* This is the guts of the commands "info functions", "info types", and
3339 "info variables". It calls search_symbols to find all matches and then
3340 print_[m]symbol_info to print out some useful information about the
3344 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3346 static char *classnames
[]
3348 {"variable", "function", "type", "method"};
3349 struct symbol_search
*symbols
;
3350 struct symbol_search
*p
;
3351 struct cleanup
*old_chain
;
3352 char *last_filename
= NULL
;
3355 /* must make sure that if we're interrupted, symbols gets freed */
3356 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3357 old_chain
= make_cleanup_free_search_symbols (symbols
);
3359 printf_filtered (regexp
3360 ? "All %ss matching regular expression \"%s\":\n"
3361 : "All defined %ss:\n",
3362 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3364 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3368 if (p
->msymbol
!= NULL
)
3372 printf_filtered ("\nNon-debugging symbols:\n");
3375 print_msymbol_info (p
->msymbol
);
3379 print_symbol_info (kind
,
3384 last_filename
= p
->symtab
->filename
;
3388 do_cleanups (old_chain
);
3392 variables_info (char *regexp
, int from_tty
)
3394 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3398 functions_info (char *regexp
, int from_tty
)
3400 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3405 types_info (char *regexp
, int from_tty
)
3407 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3410 /* Breakpoint all functions matching regular expression. */
3413 rbreak_command_wrapper (char *regexp
, int from_tty
)
3415 rbreak_command (regexp
, from_tty
);
3419 rbreak_command (char *regexp
, int from_tty
)
3421 struct symbol_search
*ss
;
3422 struct symbol_search
*p
;
3423 struct cleanup
*old_chain
;
3425 search_symbols (regexp
, FUNCTIONS_DOMAIN
, 0, (char **) NULL
, &ss
);
3426 old_chain
= make_cleanup_free_search_symbols (ss
);
3428 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3430 if (p
->msymbol
== NULL
)
3432 char *string
= alloca (strlen (p
->symtab
->filename
)
3433 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3435 strcpy (string
, p
->symtab
->filename
);
3436 strcat (string
, ":'");
3437 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3438 strcat (string
, "'");
3439 break_command (string
, from_tty
);
3440 print_symbol_info (FUNCTIONS_DOMAIN
,
3444 p
->symtab
->filename
);
3448 char *string
= alloca (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
))
3450 strcpy (string
, "'");
3451 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3452 strcat (string
, "'");
3454 break_command (string
, from_tty
);
3455 printf_filtered ("<function, no debug info> %s;\n",
3456 SYMBOL_PRINT_NAME (p
->msymbol
));
3460 do_cleanups (old_chain
);
3464 /* Helper routine for make_symbol_completion_list. */
3466 static int return_val_size
;
3467 static int return_val_index
;
3468 static char **return_val
;
3470 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3471 completion_list_add_name \
3472 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3474 /* Test to see if the symbol specified by SYMNAME (which is already
3475 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3476 characters. If so, add it to the current completion list. */
3479 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3480 char *text
, char *word
)
3485 /* clip symbols that cannot match */
3487 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3492 /* We have a match for a completion, so add SYMNAME to the current list
3493 of matches. Note that the name is moved to freshly malloc'd space. */
3497 if (word
== sym_text
)
3499 new = xmalloc (strlen (symname
) + 5);
3500 strcpy (new, symname
);
3502 else if (word
> sym_text
)
3504 /* Return some portion of symname. */
3505 new = xmalloc (strlen (symname
) + 5);
3506 strcpy (new, symname
+ (word
- sym_text
));
3510 /* Return some of SYM_TEXT plus symname. */
3511 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3512 strncpy (new, word
, sym_text
- word
);
3513 new[sym_text
- word
] = '\0';
3514 strcat (new, symname
);
3517 if (return_val_index
+ 3 > return_val_size
)
3519 newsize
= (return_val_size
*= 2) * sizeof (char *);
3520 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3522 return_val
[return_val_index
++] = new;
3523 return_val
[return_val_index
] = NULL
;
3527 /* ObjC: In case we are completing on a selector, look as the msymbol
3528 again and feed all the selectors into the mill. */
3531 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3532 int sym_text_len
, char *text
, char *word
)
3534 static char *tmp
= NULL
;
3535 static unsigned int tmplen
= 0;
3537 char *method
, *category
, *selector
;
3540 method
= SYMBOL_NATURAL_NAME (msymbol
);
3542 /* Is it a method? */
3543 if ((method
[0] != '-') && (method
[0] != '+'))
3546 if (sym_text
[0] == '[')
3547 /* Complete on shortened method method. */
3548 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3550 while ((strlen (method
) + 1) >= tmplen
)
3556 tmp
= xrealloc (tmp
, tmplen
);
3558 selector
= strchr (method
, ' ');
3559 if (selector
!= NULL
)
3562 category
= strchr (method
, '(');
3564 if ((category
!= NULL
) && (selector
!= NULL
))
3566 memcpy (tmp
, method
, (category
- method
));
3567 tmp
[category
- method
] = ' ';
3568 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3569 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3570 if (sym_text
[0] == '[')
3571 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3574 if (selector
!= NULL
)
3576 /* Complete on selector only. */
3577 strcpy (tmp
, selector
);
3578 tmp2
= strchr (tmp
, ']');
3582 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3586 /* Break the non-quoted text based on the characters which are in
3587 symbols. FIXME: This should probably be language-specific. */
3590 language_search_unquoted_string (char *text
, char *p
)
3592 for (; p
> text
; --p
)
3594 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3598 if ((current_language
->la_language
== language_objc
))
3600 if (p
[-1] == ':') /* might be part of a method name */
3602 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3603 p
-= 2; /* beginning of a method name */
3604 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3605 { /* might be part of a method name */
3608 /* Seeing a ' ' or a '(' is not conclusive evidence
3609 that we are in the middle of a method name. However,
3610 finding "-[" or "+[" should be pretty un-ambiguous.
3611 Unfortunately we have to find it now to decide. */
3614 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3615 t
[-1] == ' ' || t
[-1] == ':' ||
3616 t
[-1] == '(' || t
[-1] == ')')
3621 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3622 p
= t
- 2; /* method name detected */
3623 /* else we leave with p unchanged */
3633 default_make_symbol_completion_list (char *text
, char *word
)
3635 /* Problem: All of the symbols have to be copied because readline
3636 frees them. I'm not going to worry about this; hopefully there
3637 won't be that many. */
3641 struct partial_symtab
*ps
;
3642 struct minimal_symbol
*msymbol
;
3643 struct objfile
*objfile
;
3644 struct block
*b
, *surrounding_static_block
= 0;
3645 struct dict_iterator iter
;
3647 struct partial_symbol
**psym
;
3648 /* The symbol we are completing on. Points in same buffer as text. */
3650 /* Length of sym_text. */
3653 /* Now look for the symbol we are supposed to complete on. */
3657 char *quote_pos
= NULL
;
3659 /* First see if this is a quoted string. */
3661 for (p
= text
; *p
!= '\0'; ++p
)
3663 if (quote_found
!= '\0')
3665 if (*p
== quote_found
)
3666 /* Found close quote. */
3668 else if (*p
== '\\' && p
[1] == quote_found
)
3669 /* A backslash followed by the quote character
3670 doesn't end the string. */
3673 else if (*p
== '\'' || *p
== '"')
3679 if (quote_found
== '\'')
3680 /* A string within single quotes can be a symbol, so complete on it. */
3681 sym_text
= quote_pos
+ 1;
3682 else if (quote_found
== '"')
3683 /* A double-quoted string is never a symbol, nor does it make sense
3684 to complete it any other way. */
3686 return_val
= (char **) xmalloc (sizeof (char *));
3687 return_val
[0] = NULL
;
3692 /* It is not a quoted string. Break it based on the characters
3693 which are in symbols. */
3696 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3705 sym_text_len
= strlen (sym_text
);
3707 return_val_size
= 100;
3708 return_val_index
= 0;
3709 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3710 return_val
[0] = NULL
;
3712 /* Look through the partial symtabs for all symbols which begin
3713 by matching SYM_TEXT. Add each one that you find to the list. */
3715 ALL_PSYMTABS (objfile
, ps
)
3717 /* If the psymtab's been read in we'll get it when we search
3718 through the blockvector. */
3722 for (psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3723 psym
< (objfile
->global_psymbols
.list
+ ps
->globals_offset
3724 + ps
->n_global_syms
);
3727 /* If interrupted, then quit. */
3729 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3732 for (psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3733 psym
< (objfile
->static_psymbols
.list
+ ps
->statics_offset
3734 + ps
->n_static_syms
);
3738 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3742 /* At this point scan through the misc symbol vectors and add each
3743 symbol you find to the list. Eventually we want to ignore
3744 anything that isn't a text symbol (everything else will be
3745 handled by the psymtab code above). */
3747 ALL_MSYMBOLS (objfile
, msymbol
)
3750 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3752 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3755 /* Search upwards from currently selected frame (so that we can
3756 complete on local vars. */
3758 for (b
= get_selected_block (0); b
!= NULL
; b
= BLOCK_SUPERBLOCK (b
))
3760 if (!BLOCK_SUPERBLOCK (b
))
3762 surrounding_static_block
= b
; /* For elmin of dups */
3765 /* Also catch fields of types defined in this places which match our
3766 text string. Only complete on types visible from current context. */
3768 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3771 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3772 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3774 struct type
*t
= SYMBOL_TYPE (sym
);
3775 enum type_code c
= TYPE_CODE (t
);
3777 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3779 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3781 if (TYPE_FIELD_NAME (t
, j
))
3783 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3784 sym_text
, sym_text_len
, text
, word
);
3792 /* Go through the symtabs and check the externs and statics for
3793 symbols which match. */
3795 ALL_PRIMARY_SYMTABS (objfile
, s
)
3798 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3799 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3801 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3805 ALL_PRIMARY_SYMTABS (objfile
, s
)
3808 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3809 /* Don't do this block twice. */
3810 if (b
== surrounding_static_block
)
3812 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3814 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3818 return (return_val
);
3821 /* Return a NULL terminated array of all symbols (regardless of class)
3822 which begin by matching TEXT. If the answer is no symbols, then
3823 the return value is an array which contains only a NULL pointer. */
3826 make_symbol_completion_list (char *text
, char *word
)
3828 return current_language
->la_make_symbol_completion_list (text
, word
);
3831 /* Like make_symbol_completion_list, but returns a list of symbols
3832 defined in a source file FILE. */
3835 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3840 struct dict_iterator iter
;
3841 /* The symbol we are completing on. Points in same buffer as text. */
3843 /* Length of sym_text. */
3846 /* Now look for the symbol we are supposed to complete on.
3847 FIXME: This should be language-specific. */
3851 char *quote_pos
= NULL
;
3853 /* First see if this is a quoted string. */
3855 for (p
= text
; *p
!= '\0'; ++p
)
3857 if (quote_found
!= '\0')
3859 if (*p
== quote_found
)
3860 /* Found close quote. */
3862 else if (*p
== '\\' && p
[1] == quote_found
)
3863 /* A backslash followed by the quote character
3864 doesn't end the string. */
3867 else if (*p
== '\'' || *p
== '"')
3873 if (quote_found
== '\'')
3874 /* A string within single quotes can be a symbol, so complete on it. */
3875 sym_text
= quote_pos
+ 1;
3876 else if (quote_found
== '"')
3877 /* A double-quoted string is never a symbol, nor does it make sense
3878 to complete it any other way. */
3880 return_val
= (char **) xmalloc (sizeof (char *));
3881 return_val
[0] = NULL
;
3886 /* Not a quoted string. */
3887 sym_text
= language_search_unquoted_string (text
, p
);
3891 sym_text_len
= strlen (sym_text
);
3893 return_val_size
= 10;
3894 return_val_index
= 0;
3895 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3896 return_val
[0] = NULL
;
3898 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3900 s
= lookup_symtab (srcfile
);
3903 /* Maybe they typed the file with leading directories, while the
3904 symbol tables record only its basename. */
3905 const char *tail
= lbasename (srcfile
);
3908 s
= lookup_symtab (tail
);
3911 /* If we have no symtab for that file, return an empty list. */
3913 return (return_val
);
3915 /* Go through this symtab and check the externs and statics for
3916 symbols which match. */
3918 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3919 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3921 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3924 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3925 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3927 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3930 return (return_val
);
3933 /* A helper function for make_source_files_completion_list. It adds
3934 another file name to a list of possible completions, growing the
3935 list as necessary. */
3938 add_filename_to_list (const char *fname
, char *text
, char *word
,
3939 char ***list
, int *list_used
, int *list_alloced
)
3942 size_t fnlen
= strlen (fname
);
3944 if (*list_used
+ 1 >= *list_alloced
)
3947 *list
= (char **) xrealloc ((char *) *list
,
3948 *list_alloced
* sizeof (char *));
3953 /* Return exactly fname. */
3954 new = xmalloc (fnlen
+ 5);
3955 strcpy (new, fname
);
3957 else if (word
> text
)
3959 /* Return some portion of fname. */
3960 new = xmalloc (fnlen
+ 5);
3961 strcpy (new, fname
+ (word
- text
));
3965 /* Return some of TEXT plus fname. */
3966 new = xmalloc (fnlen
+ (text
- word
) + 5);
3967 strncpy (new, word
, text
- word
);
3968 new[text
- word
] = '\0';
3969 strcat (new, fname
);
3971 (*list
)[*list_used
] = new;
3972 (*list
)[++*list_used
] = NULL
;
3976 not_interesting_fname (const char *fname
)
3978 static const char *illegal_aliens
[] = {
3979 "_globals_", /* inserted by coff_symtab_read */
3984 for (i
= 0; illegal_aliens
[i
]; i
++)
3986 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
3992 /* Return a NULL terminated array of all source files whose names
3993 begin with matching TEXT. The file names are looked up in the
3994 symbol tables of this program. If the answer is no matchess, then
3995 the return value is an array which contains only a NULL pointer. */
3998 make_source_files_completion_list (char *text
, char *word
)
4001 struct partial_symtab
*ps
;
4002 struct objfile
*objfile
;
4004 int list_alloced
= 1;
4006 size_t text_len
= strlen (text
);
4007 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4008 const char *base_name
;
4012 if (!have_full_symbols () && !have_partial_symbols ())
4015 ALL_SYMTABS (objfile
, s
)
4017 if (not_interesting_fname (s
->filename
))
4019 if (!filename_seen (s
->filename
, 1, &first
)
4020 #if HAVE_DOS_BASED_FILE_SYSTEM
4021 && strncasecmp (s
->filename
, text
, text_len
) == 0
4023 && strncmp (s
->filename
, text
, text_len
) == 0
4027 /* This file matches for a completion; add it to the current
4029 add_filename_to_list (s
->filename
, text
, word
,
4030 &list
, &list_used
, &list_alloced
);
4034 /* NOTE: We allow the user to type a base name when the
4035 debug info records leading directories, but not the other
4036 way around. This is what subroutines of breakpoint
4037 command do when they parse file names. */
4038 base_name
= lbasename (s
->filename
);
4039 if (base_name
!= s
->filename
4040 && !filename_seen (base_name
, 1, &first
)
4041 #if HAVE_DOS_BASED_FILE_SYSTEM
4042 && strncasecmp (base_name
, text
, text_len
) == 0
4044 && strncmp (base_name
, text
, text_len
) == 0
4047 add_filename_to_list (base_name
, text
, word
,
4048 &list
, &list_used
, &list_alloced
);
4052 ALL_PSYMTABS (objfile
, ps
)
4054 if (not_interesting_fname (ps
->filename
))
4058 if (!filename_seen (ps
->filename
, 1, &first
)
4059 #if HAVE_DOS_BASED_FILE_SYSTEM
4060 && strncasecmp (ps
->filename
, text
, text_len
) == 0
4062 && strncmp (ps
->filename
, text
, text_len
) == 0
4066 /* This file matches for a completion; add it to the
4067 current list of matches. */
4068 add_filename_to_list (ps
->filename
, text
, word
,
4069 &list
, &list_used
, &list_alloced
);
4074 base_name
= lbasename (ps
->filename
);
4075 if (base_name
!= ps
->filename
4076 && !filename_seen (base_name
, 1, &first
)
4077 #if HAVE_DOS_BASED_FILE_SYSTEM
4078 && strncasecmp (base_name
, text
, text_len
) == 0
4080 && strncmp (base_name
, text
, text_len
) == 0
4083 add_filename_to_list (base_name
, text
, word
,
4084 &list
, &list_used
, &list_alloced
);
4092 /* Determine if PC is in the prologue of a function. The prologue is the area
4093 between the first instruction of a function, and the first executable line.
4094 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4096 If non-zero, func_start is where we think the prologue starts, possibly
4097 by previous examination of symbol table information.
4101 in_prologue (CORE_ADDR pc
, CORE_ADDR func_start
)
4103 struct symtab_and_line sal
;
4104 CORE_ADDR func_addr
, func_end
;
4106 /* We have several sources of information we can consult to figure
4108 - Compilers usually emit line number info that marks the prologue
4109 as its own "source line". So the ending address of that "line"
4110 is the end of the prologue. If available, this is the most
4112 - The minimal symbols and partial symbols, which can usually tell
4113 us the starting and ending addresses of a function.
4114 - If we know the function's start address, we can call the
4115 architecture-defined gdbarch_skip_prologue function to analyze the
4116 instruction stream and guess where the prologue ends.
4117 - Our `func_start' argument; if non-zero, this is the caller's
4118 best guess as to the function's entry point. At the time of
4119 this writing, handle_inferior_event doesn't get this right, so
4120 it should be our last resort. */
4122 /* Consult the partial symbol table, to find which function
4124 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4126 CORE_ADDR prologue_end
;
4128 /* We don't even have minsym information, so fall back to using
4129 func_start, if given. */
4131 return 1; /* We *might* be in a prologue. */
4133 prologue_end
= gdbarch_skip_prologue (current_gdbarch
, func_start
);
4135 return func_start
<= pc
&& pc
< prologue_end
;
4138 /* If we have line number information for the function, that's
4139 usually pretty reliable. */
4140 sal
= find_pc_line (func_addr
, 0);
4142 /* Now sal describes the source line at the function's entry point,
4143 which (by convention) is the prologue. The end of that "line",
4144 sal.end, is the end of the prologue.
4146 Note that, for functions whose source code is all on a single
4147 line, the line number information doesn't always end up this way.
4148 So we must verify that our purported end-of-prologue address is
4149 *within* the function, not at its start or end. */
4151 || sal
.end
<= func_addr
4152 || func_end
<= sal
.end
)
4154 /* We don't have any good line number info, so use the minsym
4155 information, together with the architecture-specific prologue
4157 CORE_ADDR prologue_end
= gdbarch_skip_prologue
4158 (current_gdbarch
, func_addr
);
4160 return func_addr
<= pc
&& pc
< prologue_end
;
4163 /* We have line number info, and it looks good. */
4164 return func_addr
<= pc
&& pc
< sal
.end
;
4167 /* Given PC at the function's start address, attempt to find the
4168 prologue end using SAL information. Return zero if the skip fails.
4170 A non-optimized prologue traditionally has one SAL for the function
4171 and a second for the function body. A single line function has
4172 them both pointing at the same line.
4174 An optimized prologue is similar but the prologue may contain
4175 instructions (SALs) from the instruction body. Need to skip those
4176 while not getting into the function body.
4178 The functions end point and an increasing SAL line are used as
4179 indicators of the prologue's endpoint.
4181 This code is based on the function refine_prologue_limit (versions
4182 found in both ia64 and ppc). */
4185 skip_prologue_using_sal (CORE_ADDR func_addr
)
4187 struct symtab_and_line prologue_sal
;
4191 /* Get an initial range for the function. */
4192 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4193 start_pc
+= gdbarch_deprecated_function_start_offset (current_gdbarch
);
4195 prologue_sal
= find_pc_line (start_pc
, 0);
4196 if (prologue_sal
.line
!= 0)
4198 /* If there is only one sal that covers the entire function,
4199 then it is probably a single line function, like
4201 if (prologue_sal
.end
>= end_pc
)
4203 while (prologue_sal
.end
< end_pc
)
4205 struct symtab_and_line sal
;
4207 sal
= find_pc_line (prologue_sal
.end
, 0);
4210 /* Assume that a consecutive SAL for the same (or larger)
4211 line mark the prologue -> body transition. */
4212 if (sal
.line
>= prologue_sal
.line
)
4214 /* The case in which compiler's optimizer/scheduler has
4215 moved instructions into the prologue. We look ahead in
4216 the function looking for address ranges whose
4217 corresponding line number is less the first one that we
4218 found for the function. This is more conservative then
4219 refine_prologue_limit which scans a large number of SALs
4220 looking for any in the prologue */
4224 return prologue_sal
.end
;
4227 struct symtabs_and_lines
4228 decode_line_spec (char *string
, int funfirstline
)
4230 struct symtabs_and_lines sals
;
4231 struct symtab_and_line cursal
;
4234 error (_("Empty line specification."));
4236 /* We use whatever is set as the current source line. We do not try
4237 and get a default or it will recursively call us! */
4238 cursal
= get_current_source_symtab_and_line ();
4240 sals
= decode_line_1 (&string
, funfirstline
,
4241 cursal
.symtab
, cursal
.line
,
4242 (char ***) NULL
, NULL
);
4245 error (_("Junk at end of line specification: %s"), string
);
4250 static char *name_of_main
;
4253 set_main_name (const char *name
)
4255 if (name_of_main
!= NULL
)
4257 xfree (name_of_main
);
4258 name_of_main
= NULL
;
4262 name_of_main
= xstrdup (name
);
4266 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4270 find_main_name (void)
4272 const char *new_main_name
;
4274 /* Try to see if the main procedure is in Ada. */
4275 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4276 be to add a new method in the language vector, and call this
4277 method for each language until one of them returns a non-empty
4278 name. This would allow us to remove this hard-coded call to
4279 an Ada function. It is not clear that this is a better approach
4280 at this point, because all methods need to be written in a way
4281 such that false positives never be returned. For instance, it is
4282 important that a method does not return a wrong name for the main
4283 procedure if the main procedure is actually written in a different
4284 language. It is easy to guaranty this with Ada, since we use a
4285 special symbol generated only when the main in Ada to find the name
4286 of the main procedure. It is difficult however to see how this can
4287 be guarantied for languages such as C, for instance. This suggests
4288 that order of call for these methods becomes important, which means
4289 a more complicated approach. */
4290 new_main_name
= ada_main_name ();
4291 if (new_main_name
!= NULL
)
4293 set_main_name (new_main_name
);
4297 new_main_name
= pascal_main_name ();
4298 if (new_main_name
!= NULL
)
4300 set_main_name (new_main_name
);
4304 /* The languages above didn't identify the name of the main procedure.
4305 Fallback to "main". */
4306 set_main_name ("main");
4312 if (name_of_main
== NULL
)
4315 return name_of_main
;
4318 /* Handle ``executable_changed'' events for the symtab module. */
4321 symtab_observer_executable_changed (void *unused
)
4323 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4324 set_main_name (NULL
);
4327 /* Helper to expand_line_sal below. Appends new sal to SAL,
4328 initializing it from SYMTAB, LINENO and PC. */
4330 append_expanded_sal (struct symtabs_and_lines
*sal
,
4331 struct symtab
*symtab
,
4332 int lineno
, CORE_ADDR pc
)
4334 CORE_ADDR func_addr
, func_end
;
4336 sal
->sals
= xrealloc (sal
->sals
,
4337 sizeof (sal
->sals
[0])
4338 * (sal
->nelts
+ 1));
4339 init_sal (sal
->sals
+ sal
->nelts
);
4340 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4341 sal
->sals
[sal
->nelts
].section
= NULL
;
4342 sal
->sals
[sal
->nelts
].end
= 0;
4343 sal
->sals
[sal
->nelts
].line
= lineno
;
4344 sal
->sals
[sal
->nelts
].pc
= pc
;
4348 /* Compute a set of all sals in
4349 the entire program that correspond to same file
4350 and line as SAL and return those. If there
4351 are several sals that belong to the same block,
4352 only one sal for the block is included in results. */
4354 struct symtabs_and_lines
4355 expand_line_sal (struct symtab_and_line sal
)
4357 struct symtabs_and_lines ret
, this_line
;
4359 struct objfile
*objfile
;
4360 struct partial_symtab
*psymtab
;
4361 struct symtab
*symtab
;
4364 struct block
**blocks
= NULL
;
4370 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4372 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4379 struct linetable_entry
*best_item
= 0;
4380 struct symtab
*best_symtab
= 0;
4385 /* We meed to find all symtabs for a file which name
4386 is described by sal. We cannot just directly
4387 iterate over symtabs, since a symtab might not be
4388 yet created. We also cannot iterate over psymtabs,
4389 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4390 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4391 corresponding to an included file. Therefore, we do
4392 first pass over psymtabs, reading in those with
4393 the right name. Then, we iterate over symtabs, knowing
4394 that all symtabs we're interested in are loaded. */
4396 ALL_PSYMTABS (objfile
, psymtab
)
4398 if (strcmp (sal
.symtab
->filename
,
4399 psymtab
->filename
) == 0)
4400 PSYMTAB_TO_SYMTAB (psymtab
);
4404 /* For each symtab, we add all pcs to ret.sals. I'm actually
4405 not sure what to do if we have exact match in one symtab,
4406 and non-exact match on another symtab.
4408 ALL_SYMTABS (objfile
, symtab
)
4410 if (strcmp (sal
.symtab
->filename
,
4411 symtab
->filename
) == 0)
4413 struct linetable
*l
;
4415 l
= LINETABLE (symtab
);
4420 for (j
= 0; j
< len
; j
++)
4422 struct linetable_entry
*item
= &(l
->item
[j
]);
4424 if (item
->line
== lineno
)
4427 append_expanded_sal (&ret
, symtab
, lineno
, item
->pc
);
4429 else if (!exact
&& item
->line
> lineno
4430 && (best_item
== NULL
|| item
->line
< best_item
->line
))
4434 best_symtab
= symtab
;
4439 if (!exact
&& best_item
)
4440 append_expanded_sal (&ret
, best_symtab
, lineno
, best_item
->pc
);
4443 /* For optimized code, compiler can scatter one source line accross
4444 disjoint ranges of PC values, even when no duplicate functions
4445 or inline functions are involved. For example, 'for (;;)' inside
4446 non-template non-inline non-ctor-or-dtor function can result
4447 in two PC ranges. In this case, we don't want to set breakpoint
4448 on first PC of each range. To filter such cases, we use containing
4449 blocks -- for each PC found above we see if there are other PCs
4450 that are in the same block. If yes, the other PCs are filtered out. */
4452 filter
= xmalloc (ret
.nelts
* sizeof (int));
4453 blocks
= xmalloc (ret
.nelts
* sizeof (struct block
*));
4454 for (i
= 0; i
< ret
.nelts
; ++i
)
4457 blocks
[i
] = block_for_pc (ret
.sals
[i
].pc
);
4460 for (i
= 0; i
< ret
.nelts
; ++i
)
4461 if (blocks
[i
] != NULL
)
4462 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4463 if (blocks
[j
] == blocks
[i
])
4471 struct symtab_and_line
*final
=
4472 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4474 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4476 final
[j
++] = ret
.sals
[i
];
4478 ret
.nelts
-= deleted
;
4488 _initialize_symtab (void)
4490 add_info ("variables", variables_info
, _("\
4491 All global and static variable names, or those matching REGEXP."));
4493 add_com ("whereis", class_info
, variables_info
, _("\
4494 All global and static variable names, or those matching REGEXP."));
4496 add_info ("functions", functions_info
,
4497 _("All function names, or those matching REGEXP."));
4500 /* FIXME: This command has at least the following problems:
4501 1. It prints builtin types (in a very strange and confusing fashion).
4502 2. It doesn't print right, e.g. with
4503 typedef struct foo *FOO
4504 type_print prints "FOO" when we want to make it (in this situation)
4505 print "struct foo *".
4506 I also think "ptype" or "whatis" is more likely to be useful (but if
4507 there is much disagreement "info types" can be fixed). */
4508 add_info ("types", types_info
,
4509 _("All type names, or those matching REGEXP."));
4511 add_info ("sources", sources_info
,
4512 _("Source files in the program."));
4514 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4515 _("Set a breakpoint for all functions matching REGEXP."));
4519 add_com ("lf", class_info
, sources_info
,
4520 _("Source files in the program"));
4521 add_com ("lg", class_info
, variables_info
, _("\
4522 All global and static variable names, or those matching REGEXP."));
4525 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4526 multiple_symbols_modes
, &multiple_symbols_mode
,
4528 Set the debugger behavior when more than one symbol are possible matches\n\
4529 in an expression."), _("\
4530 Show how the debugger handles ambiguities in expressions."), _("\
4531 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4532 NULL
, NULL
, &setlist
, &showlist
);
4534 /* Initialize the one built-in type that isn't language dependent... */
4535 builtin_type_error
= init_type (TYPE_CODE_ERROR
, 0, 0,
4536 "<unknown type>", (struct objfile
*) NULL
);
4538 observer_attach_executable_changed (symtab_observer_executable_changed
);