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 (const 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 (obj_section_addr (s
) - offset
<= addr
1085 && addr
< obj_section_endaddr (s
) - offset
)
1087 ginfo
->bfd_section
= s
->the_bfd_section
;
1088 ginfo
->section
= idx
;
1096 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1103 if (SYMBOL_BFD_SECTION (sym
))
1106 /* We either have an OBJFILE, or we can get at it from the sym's
1107 symtab. Anything else is a bug. */
1108 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1110 if (objfile
== NULL
)
1111 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1113 /* We should have an objfile by now. */
1114 gdb_assert (objfile
);
1116 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
))
1155 addr
= SYMBOL_VALUE_ADDRESS (psym
);
1158 /* Nothing else will be listed in the minsyms -- no use looking
1163 fixup_section (&psym
->ginfo
, addr
, objfile
);
1168 /* Find the definition for a specified symbol name NAME
1169 in domain DOMAIN, visible from lexical block BLOCK.
1170 Returns the struct symbol pointer, or zero if no symbol is found.
1171 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1172 NAME is a field of the current implied argument `this'. If so set
1173 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1174 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1175 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1177 /* This function has a bunch of loops in it and it would seem to be
1178 attractive to put in some QUIT's (though I'm not really sure
1179 whether it can run long enough to be really important). But there
1180 are a few calls for which it would appear to be bad news to quit
1181 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1182 that there is C++ code below which can error(), but that probably
1183 doesn't affect these calls since they are looking for a known
1184 variable and thus can probably assume it will never hit the C++
1188 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1189 const domain_enum domain
, enum language lang
,
1190 int *is_a_field_of_this
)
1192 char *demangled_name
= NULL
;
1193 const char *modified_name
= NULL
;
1194 const char *mangled_name
= NULL
;
1195 int needtofreename
= 0;
1196 struct symbol
*returnval
;
1198 modified_name
= name
;
1200 /* If we are using C++ or Java, demangle the name before doing a lookup, so
1201 we can always binary search. */
1202 if (lang
== language_cplus
)
1204 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1207 mangled_name
= name
;
1208 modified_name
= demangled_name
;
1212 else if (lang
== language_java
)
1214 demangled_name
= cplus_demangle (name
,
1215 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1218 mangled_name
= name
;
1219 modified_name
= demangled_name
;
1224 if (case_sensitivity
== case_sensitive_off
)
1229 len
= strlen (name
);
1230 copy
= (char *) alloca (len
+ 1);
1231 for (i
= 0; i
< len
; i
++)
1232 copy
[i
] = tolower (name
[i
]);
1234 modified_name
= copy
;
1237 returnval
= lookup_symbol_aux (modified_name
, mangled_name
, block
,
1238 domain
, lang
, is_a_field_of_this
);
1240 xfree (demangled_name
);
1245 /* Behave like lookup_symbol_in_language, but performed with the
1246 current language. */
1249 lookup_symbol (const char *name
, const struct block
*block
,
1250 domain_enum domain
, int *is_a_field_of_this
)
1252 return lookup_symbol_in_language (name
, block
, domain
,
1253 current_language
->la_language
,
1254 is_a_field_of_this
);
1257 /* Behave like lookup_symbol except that NAME is the natural name
1258 of the symbol that we're looking for and, if LINKAGE_NAME is
1259 non-NULL, ensure that the symbol's linkage name matches as
1262 static struct symbol
*
1263 lookup_symbol_aux (const char *name
, const char *linkage_name
,
1264 const struct block
*block
, const domain_enum domain
,
1265 enum language language
, int *is_a_field_of_this
)
1268 const struct language_defn
*langdef
;
1270 /* Make sure we do something sensible with is_a_field_of_this, since
1271 the callers that set this parameter to some non-null value will
1272 certainly use it later and expect it to be either 0 or 1.
1273 If we don't set it, the contents of is_a_field_of_this are
1275 if (is_a_field_of_this
!= NULL
)
1276 *is_a_field_of_this
= 0;
1278 /* Search specified block and its superiors. Don't search
1279 STATIC_BLOCK or GLOBAL_BLOCK. */
1281 sym
= lookup_symbol_aux_local (name
, linkage_name
, block
, domain
);
1285 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1286 check to see if NAME is a field of `this'. */
1288 langdef
= language_def (language
);
1290 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1293 struct symbol
*sym
= NULL
;
1294 /* 'this' is only defined in the function's block, so find the
1295 enclosing function block. */
1296 for (; block
&& !BLOCK_FUNCTION (block
);
1297 block
= BLOCK_SUPERBLOCK (block
));
1299 if (block
&& !dict_empty (BLOCK_DICT (block
)))
1300 sym
= lookup_block_symbol (block
, langdef
->la_name_of_this
,
1304 struct type
*t
= sym
->type
;
1306 /* I'm not really sure that type of this can ever
1307 be typedefed; just be safe. */
1309 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1310 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1311 t
= TYPE_TARGET_TYPE (t
);
1313 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1314 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1315 error (_("Internal error: `%s' is not an aggregate"),
1316 langdef
->la_name_of_this
);
1318 if (check_field (t
, name
))
1320 *is_a_field_of_this
= 1;
1326 /* Now do whatever is appropriate for LANGUAGE to look
1327 up static and global variables. */
1329 sym
= langdef
->la_lookup_symbol_nonlocal (name
, linkage_name
, block
, domain
);
1333 /* Now search all static file-level symbols. Not strictly correct,
1334 but more useful than an error. Do the symtabs first, then check
1335 the psymtabs. If a psymtab indicates the existence of the
1336 desired name as a file-level static, then do psymtab-to-symtab
1337 conversion on the fly and return the found symbol. */
1339 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1343 sym
= lookup_symbol_aux_psymtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1350 /* Check to see if the symbol is defined in BLOCK or its superiors.
1351 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1353 static struct symbol
*
1354 lookup_symbol_aux_local (const char *name
, const char *linkage_name
,
1355 const struct block
*block
,
1356 const domain_enum domain
)
1359 const struct block
*static_block
= block_static_block (block
);
1361 /* Check if either no block is specified or it's a global block. */
1363 if (static_block
== NULL
)
1366 while (block
!= static_block
)
1368 sym
= lookup_symbol_aux_block (name
, linkage_name
, block
, domain
);
1371 block
= BLOCK_SUPERBLOCK (block
);
1374 /* We've reached the static block without finding a result. */
1379 /* Look up OBJFILE to BLOCK. */
1381 static struct objfile
*
1382 lookup_objfile_from_block (const struct block
*block
)
1384 struct objfile
*obj
;
1390 block
= block_global_block (block
);
1391 /* Go through SYMTABS. */
1392 ALL_SYMTABS (obj
, s
)
1393 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1399 /* Look up a symbol in a block; if found, fixup the symbol, and set
1400 block_found appropriately. */
1403 lookup_symbol_aux_block (const char *name
, const char *linkage_name
,
1404 const struct block
*block
,
1405 const domain_enum domain
)
1409 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1412 block_found
= block
;
1413 return fixup_symbol_section (sym
, NULL
);
1419 /* Check all global symbols in OBJFILE in symtabs and
1423 lookup_global_symbol_from_objfile (const struct objfile
*objfile
,
1425 const char *linkage_name
,
1426 const domain_enum domain
)
1429 struct blockvector
*bv
;
1430 const struct block
*block
;
1432 struct partial_symtab
*ps
;
1434 /* Go through symtabs. */
1435 ALL_OBJFILE_SYMTABS (objfile
, s
)
1437 bv
= BLOCKVECTOR (s
);
1438 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1439 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1442 block_found
= block
;
1443 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1447 /* Now go through psymtabs. */
1448 ALL_OBJFILE_PSYMTABS (objfile
, ps
)
1451 && lookup_partial_symbol (ps
, name
, linkage_name
,
1454 s
= PSYMTAB_TO_SYMTAB (ps
);
1455 bv
= BLOCKVECTOR (s
);
1456 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1457 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1458 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1462 if (objfile
->separate_debug_objfile
)
1463 return lookup_global_symbol_from_objfile (objfile
->separate_debug_objfile
,
1464 name
, linkage_name
, domain
);
1469 /* Check to see if the symbol is defined in one of the symtabs.
1470 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1471 depending on whether or not we want to search global symbols or
1474 static struct symbol
*
1475 lookup_symbol_aux_symtabs (int block_index
,
1476 const char *name
, const char *linkage_name
,
1477 const domain_enum domain
)
1480 struct objfile
*objfile
;
1481 struct blockvector
*bv
;
1482 const struct block
*block
;
1485 ALL_PRIMARY_SYMTABS (objfile
, s
)
1487 bv
= BLOCKVECTOR (s
);
1488 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1489 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1492 block_found
= block
;
1493 return fixup_symbol_section (sym
, objfile
);
1500 /* Check to see if the symbol is defined in one of the partial
1501 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1502 STATIC_BLOCK, depending on whether or not we want to search global
1503 symbols or static symbols. */
1505 static struct symbol
*
1506 lookup_symbol_aux_psymtabs (int block_index
, const char *name
,
1507 const char *linkage_name
,
1508 const domain_enum domain
)
1511 struct objfile
*objfile
;
1512 struct blockvector
*bv
;
1513 const struct block
*block
;
1514 struct partial_symtab
*ps
;
1516 const int psymtab_index
= (block_index
== GLOBAL_BLOCK
? 1 : 0);
1518 ALL_PSYMTABS (objfile
, ps
)
1521 && lookup_partial_symbol (ps
, name
, linkage_name
,
1522 psymtab_index
, domain
))
1524 s
= PSYMTAB_TO_SYMTAB (ps
);
1525 bv
= BLOCKVECTOR (s
);
1526 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1527 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1530 /* This shouldn't be necessary, but as a last resort try
1531 looking in the statics even though the psymtab claimed
1532 the symbol was global, or vice-versa. It's possible
1533 that the psymtab gets it wrong in some cases. */
1535 /* FIXME: carlton/2002-09-30: Should we really do that?
1536 If that happens, isn't it likely to be a GDB error, in
1537 which case we should fix the GDB error rather than
1538 silently dealing with it here? So I'd vote for
1539 removing the check for the symbol in the other
1541 block
= BLOCKVECTOR_BLOCK (bv
,
1542 block_index
== GLOBAL_BLOCK
?
1543 STATIC_BLOCK
: GLOBAL_BLOCK
);
1544 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1546 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>)."),
1547 block_index
== GLOBAL_BLOCK
? "global" : "static",
1548 name
, ps
->filename
, name
, name
);
1550 return fixup_symbol_section (sym
, objfile
);
1557 /* A default version of lookup_symbol_nonlocal for use by languages
1558 that can't think of anything better to do. This implements the C
1562 basic_lookup_symbol_nonlocal (const char *name
,
1563 const char *linkage_name
,
1564 const struct block
*block
,
1565 const domain_enum domain
)
1569 /* NOTE: carlton/2003-05-19: The comments below were written when
1570 this (or what turned into this) was part of lookup_symbol_aux;
1571 I'm much less worried about these questions now, since these
1572 decisions have turned out well, but I leave these comments here
1575 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1576 not it would be appropriate to search the current global block
1577 here as well. (That's what this code used to do before the
1578 is_a_field_of_this check was moved up.) On the one hand, it's
1579 redundant with the lookup_symbol_aux_symtabs search that happens
1580 next. On the other hand, if decode_line_1 is passed an argument
1581 like filename:var, then the user presumably wants 'var' to be
1582 searched for in filename. On the third hand, there shouldn't be
1583 multiple global variables all of which are named 'var', and it's
1584 not like decode_line_1 has ever restricted its search to only
1585 global variables in a single filename. All in all, only
1586 searching the static block here seems best: it's correct and it's
1589 /* NOTE: carlton/2002-12-05: There's also a possible performance
1590 issue here: if you usually search for global symbols in the
1591 current file, then it would be slightly better to search the
1592 current global block before searching all the symtabs. But there
1593 are other factors that have a much greater effect on performance
1594 than that one, so I don't think we should worry about that for
1597 sym
= lookup_symbol_static (name
, linkage_name
, block
, domain
);
1601 return lookup_symbol_global (name
, linkage_name
, block
, domain
);
1604 /* Lookup a symbol in the static block associated to BLOCK, if there
1605 is one; do nothing if BLOCK is NULL or a global block. */
1608 lookup_symbol_static (const char *name
,
1609 const char *linkage_name
,
1610 const struct block
*block
,
1611 const domain_enum domain
)
1613 const struct block
*static_block
= block_static_block (block
);
1615 if (static_block
!= NULL
)
1616 return lookup_symbol_aux_block (name
, linkage_name
, static_block
, domain
);
1621 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1625 lookup_symbol_global (const char *name
,
1626 const char *linkage_name
,
1627 const struct block
*block
,
1628 const domain_enum domain
)
1630 struct symbol
*sym
= NULL
;
1631 struct objfile
*objfile
= NULL
;
1633 /* Call library-specific lookup procedure. */
1634 objfile
= lookup_objfile_from_block (block
);
1635 if (objfile
!= NULL
)
1636 sym
= solib_global_lookup (objfile
, name
, linkage_name
, domain
);
1640 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1644 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1648 symbol_matches_domain (enum language symbol_language
,
1649 domain_enum symbol_domain
,
1652 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1653 A Java class declaration also defines a typedef for the class.
1654 Similarly, any Ada type declaration implicitly defines a typedef. */
1655 if (symbol_language
== language_cplus
1656 || symbol_language
== language_java
1657 || symbol_language
== language_ada
)
1659 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1660 && symbol_domain
== STRUCT_DOMAIN
)
1663 /* For all other languages, strict match is required. */
1664 return (symbol_domain
== domain
);
1667 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1668 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1669 linkage name matches it. Check the global symbols if GLOBAL, the
1670 static symbols if not */
1672 struct partial_symbol
*
1673 lookup_partial_symbol (struct partial_symtab
*pst
, const char *name
,
1674 const char *linkage_name
, int global
,
1677 struct partial_symbol
*temp
;
1678 struct partial_symbol
**start
, **psym
;
1679 struct partial_symbol
**top
, **real_top
, **bottom
, **center
;
1680 int length
= (global
? pst
->n_global_syms
: pst
->n_static_syms
);
1681 int do_linear_search
= 1;
1688 pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
:
1689 pst
->objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1691 if (global
) /* This means we can use a binary search. */
1693 do_linear_search
= 0;
1695 /* Binary search. This search is guaranteed to end with center
1696 pointing at the earliest partial symbol whose name might be
1697 correct. At that point *all* partial symbols with an
1698 appropriate name will be checked against the correct
1702 top
= start
+ length
- 1;
1704 while (top
> bottom
)
1706 center
= bottom
+ (top
- bottom
) / 2;
1707 if (!(center
< top
))
1708 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1709 if (!do_linear_search
1710 && (SYMBOL_LANGUAGE (*center
) == language_java
))
1712 do_linear_search
= 1;
1714 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center
), name
) >= 0)
1720 bottom
= center
+ 1;
1723 if (!(top
== bottom
))
1724 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1726 while (top
<= real_top
1727 && (linkage_name
!= NULL
1728 ? strcmp (SYMBOL_LINKAGE_NAME (*top
), linkage_name
) == 0
1729 : SYMBOL_MATCHES_SEARCH_NAME (*top
,name
)))
1731 if (symbol_matches_domain (SYMBOL_LANGUAGE (*top
),
1732 SYMBOL_DOMAIN (*top
), domain
))
1738 /* Can't use a binary search or else we found during the binary search that
1739 we should also do a linear search. */
1741 if (do_linear_search
)
1743 for (psym
= start
; psym
< start
+ length
; psym
++)
1745 if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym
),
1746 SYMBOL_DOMAIN (*psym
), domain
))
1748 if (linkage_name
!= NULL
1749 ? strcmp (SYMBOL_LINKAGE_NAME (*psym
), linkage_name
) == 0
1750 : SYMBOL_MATCHES_SEARCH_NAME (*psym
, name
))
1761 /* Look up a type named NAME in the struct_domain. The type returned
1762 must not be opaque -- i.e., must have at least one field
1766 lookup_transparent_type (const char *name
)
1768 return current_language
->la_lookup_transparent_type (name
);
1771 /* The standard implementation of lookup_transparent_type. This code
1772 was modeled on lookup_symbol -- the parts not relevant to looking
1773 up types were just left out. In particular it's assumed here that
1774 types are available in struct_domain and only at file-static or
1778 basic_lookup_transparent_type (const char *name
)
1781 struct symtab
*s
= NULL
;
1782 struct partial_symtab
*ps
;
1783 struct blockvector
*bv
;
1784 struct objfile
*objfile
;
1785 struct block
*block
;
1787 /* Now search all the global symbols. Do the symtab's first, then
1788 check the psymtab's. If a psymtab indicates the existence
1789 of the desired name as a global, then do psymtab-to-symtab
1790 conversion on the fly and return the found symbol. */
1792 ALL_PRIMARY_SYMTABS (objfile
, s
)
1794 bv
= BLOCKVECTOR (s
);
1795 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1796 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1797 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1799 return SYMBOL_TYPE (sym
);
1803 ALL_PSYMTABS (objfile
, ps
)
1805 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
,
1808 s
= PSYMTAB_TO_SYMTAB (ps
);
1809 bv
= BLOCKVECTOR (s
);
1810 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1811 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1814 /* This shouldn't be necessary, but as a last resort
1815 * try looking in the statics even though the psymtab
1816 * claimed the symbol was global. It's possible that
1817 * the psymtab gets it wrong in some cases.
1819 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1820 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1822 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1823 %s may be an inlined function, or may be a template function\n\
1824 (if a template, try specifying an instantiation: %s<type>)."),
1825 name
, ps
->filename
, name
, name
);
1827 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1828 return SYMBOL_TYPE (sym
);
1832 /* Now search the static file-level symbols.
1833 Not strictly correct, but more useful than an error.
1834 Do the symtab's first, then
1835 check the psymtab's. If a psymtab indicates the existence
1836 of the desired name as a file-level static, then do psymtab-to-symtab
1837 conversion on the fly and return the found symbol.
1840 ALL_PRIMARY_SYMTABS (objfile
, s
)
1842 bv
= BLOCKVECTOR (s
);
1843 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1844 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1845 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1847 return SYMBOL_TYPE (sym
);
1851 ALL_PSYMTABS (objfile
, ps
)
1853 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
, 0, STRUCT_DOMAIN
))
1855 s
= PSYMTAB_TO_SYMTAB (ps
);
1856 bv
= BLOCKVECTOR (s
);
1857 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1858 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1861 /* This shouldn't be necessary, but as a last resort
1862 * try looking in the globals even though the psymtab
1863 * claimed the symbol was static. It's possible that
1864 * the psymtab gets it wrong in some cases.
1866 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1867 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1869 error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1870 %s may be an inlined function, or may be a template function\n\
1871 (if a template, try specifying an instantiation: %s<type>)."),
1872 name
, ps
->filename
, name
, name
);
1874 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1875 return SYMBOL_TYPE (sym
);
1878 return (struct type
*) 0;
1882 /* Find the psymtab containing main(). */
1883 /* FIXME: What about languages without main() or specially linked
1884 executables that have no main() ? */
1886 struct partial_symtab
*
1887 find_main_psymtab (void)
1889 struct partial_symtab
*pst
;
1890 struct objfile
*objfile
;
1892 ALL_PSYMTABS (objfile
, pst
)
1894 if (lookup_partial_symbol (pst
, main_name (), NULL
, 1, VAR_DOMAIN
))
1902 /* Search BLOCK for symbol NAME in DOMAIN.
1904 Note that if NAME is the demangled form of a C++ symbol, we will fail
1905 to find a match during the binary search of the non-encoded names, but
1906 for now we don't worry about the slight inefficiency of looking for
1907 a match we'll never find, since it will go pretty quick. Once the
1908 binary search terminates, we drop through and do a straight linear
1909 search on the symbols. Each symbol which is marked as being a ObjC/C++
1910 symbol (language_cplus or language_objc set) has both the encoded and
1911 non-encoded names tested for a match.
1913 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1914 particular mangled name.
1918 lookup_block_symbol (const struct block
*block
, const char *name
,
1919 const char *linkage_name
,
1920 const domain_enum domain
)
1922 struct dict_iterator iter
;
1925 if (!BLOCK_FUNCTION (block
))
1927 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1929 sym
= dict_iter_name_next (name
, &iter
))
1931 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1932 SYMBOL_DOMAIN (sym
), domain
)
1933 && (linkage_name
!= NULL
1934 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1941 /* Note that parameter symbols do not always show up last in the
1942 list; this loop makes sure to take anything else other than
1943 parameter symbols first; it only uses parameter symbols as a
1944 last resort. Note that this only takes up extra computation
1947 struct symbol
*sym_found
= NULL
;
1949 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1951 sym
= dict_iter_name_next (name
, &iter
))
1953 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1954 SYMBOL_DOMAIN (sym
), domain
)
1955 && (linkage_name
!= NULL
1956 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1959 if (!SYMBOL_IS_ARGUMENT (sym
))
1965 return (sym_found
); /* Will be NULL if not found. */
1969 /* Find the symtab associated with PC and SECTION. Look through the
1970 psymtabs and read in another symtab if necessary. */
1973 find_pc_sect_symtab (CORE_ADDR pc
, asection
*section
)
1976 struct blockvector
*bv
;
1977 struct symtab
*s
= NULL
;
1978 struct symtab
*best_s
= NULL
;
1979 struct partial_symtab
*ps
;
1980 struct objfile
*objfile
;
1981 CORE_ADDR distance
= 0;
1982 struct minimal_symbol
*msymbol
;
1984 /* If we know that this is not a text address, return failure. This is
1985 necessary because we loop based on the block's high and low code
1986 addresses, which do not include the data ranges, and because
1987 we call find_pc_sect_psymtab which has a similar restriction based
1988 on the partial_symtab's texthigh and textlow. */
1989 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1991 && (msymbol
->type
== mst_data
1992 || msymbol
->type
== mst_bss
1993 || msymbol
->type
== mst_abs
1994 || msymbol
->type
== mst_file_data
1995 || msymbol
->type
== mst_file_bss
))
1998 /* Search all symtabs for the one whose file contains our address, and which
1999 is the smallest of all the ones containing the address. This is designed
2000 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2001 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2002 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2004 This happens for native ecoff format, where code from included files
2005 gets its own symtab. The symtab for the included file should have
2006 been read in already via the dependency mechanism.
2007 It might be swifter to create several symtabs with the same name
2008 like xcoff does (I'm not sure).
2010 It also happens for objfiles that have their functions reordered.
2011 For these, the symtab we are looking for is not necessarily read in. */
2013 ALL_PRIMARY_SYMTABS (objfile
, s
)
2015 bv
= BLOCKVECTOR (s
);
2016 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2018 if (BLOCK_START (b
) <= pc
2019 && BLOCK_END (b
) > pc
2021 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2023 /* For an objfile that has its functions reordered,
2024 find_pc_psymtab will find the proper partial symbol table
2025 and we simply return its corresponding symtab. */
2026 /* In order to better support objfiles that contain both
2027 stabs and coff debugging info, we continue on if a psymtab
2029 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->psymtabs
)
2031 ps
= find_pc_sect_psymtab (pc
, section
);
2033 return PSYMTAB_TO_SYMTAB (ps
);
2037 struct dict_iterator iter
;
2038 struct symbol
*sym
= NULL
;
2040 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2042 fixup_symbol_section (sym
, objfile
);
2043 if (matching_bfd_sections (SYMBOL_BFD_SECTION (sym
), section
))
2047 continue; /* no symbol in this symtab matches section */
2049 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2058 ps
= find_pc_sect_psymtab (pc
, section
);
2062 /* Might want to error() here (in case symtab is corrupt and
2063 will cause a core dump), but maybe we can successfully
2064 continue, so let's not. */
2066 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n"),
2068 s
= PSYMTAB_TO_SYMTAB (ps
);
2073 /* Find the symtab associated with PC. Look through the psymtabs and
2074 read in another symtab if necessary. Backward compatibility, no section */
2077 find_pc_symtab (CORE_ADDR pc
)
2079 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2083 /* Find the source file and line number for a given PC value and SECTION.
2084 Return a structure containing a symtab pointer, a line number,
2085 and a pc range for the entire source line.
2086 The value's .pc field is NOT the specified pc.
2087 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2088 use the line that ends there. Otherwise, in that case, the line
2089 that begins there is used. */
2091 /* The big complication here is that a line may start in one file, and end just
2092 before the start of another file. This usually occurs when you #include
2093 code in the middle of a subroutine. To properly find the end of a line's PC
2094 range, we must search all symtabs associated with this compilation unit, and
2095 find the one whose first PC is closer than that of the next line in this
2098 /* If it's worth the effort, we could be using a binary search. */
2100 struct symtab_and_line
2101 find_pc_sect_line (CORE_ADDR pc
, struct bfd_section
*section
, int notcurrent
)
2104 struct linetable
*l
;
2107 struct linetable_entry
*item
;
2108 struct symtab_and_line val
;
2109 struct blockvector
*bv
;
2110 struct minimal_symbol
*msymbol
;
2111 struct minimal_symbol
*mfunsym
;
2113 /* Info on best line seen so far, and where it starts, and its file. */
2115 struct linetable_entry
*best
= NULL
;
2116 CORE_ADDR best_end
= 0;
2117 struct symtab
*best_symtab
= 0;
2119 /* Store here the first line number
2120 of a file which contains the line at the smallest pc after PC.
2121 If we don't find a line whose range contains PC,
2122 we will use a line one less than this,
2123 with a range from the start of that file to the first line's pc. */
2124 struct linetable_entry
*alt
= NULL
;
2125 struct symtab
*alt_symtab
= 0;
2127 /* Info on best line seen in this file. */
2129 struct linetable_entry
*prev
;
2131 /* If this pc is not from the current frame,
2132 it is the address of the end of a call instruction.
2133 Quite likely that is the start of the following statement.
2134 But what we want is the statement containing the instruction.
2135 Fudge the pc to make sure we get that. */
2137 init_sal (&val
); /* initialize to zeroes */
2139 /* It's tempting to assume that, if we can't find debugging info for
2140 any function enclosing PC, that we shouldn't search for line
2141 number info, either. However, GAS can emit line number info for
2142 assembly files --- very helpful when debugging hand-written
2143 assembly code. In such a case, we'd have no debug info for the
2144 function, but we would have line info. */
2149 /* elz: added this because this function returned the wrong
2150 information if the pc belongs to a stub (import/export)
2151 to call a shlib function. This stub would be anywhere between
2152 two functions in the target, and the line info was erroneously
2153 taken to be the one of the line before the pc.
2155 /* RT: Further explanation:
2157 * We have stubs (trampolines) inserted between procedures.
2159 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2160 * exists in the main image.
2162 * In the minimal symbol table, we have a bunch of symbols
2163 * sorted by start address. The stubs are marked as "trampoline",
2164 * the others appear as text. E.g.:
2166 * Minimal symbol table for main image
2167 * main: code for main (text symbol)
2168 * shr1: stub (trampoline symbol)
2169 * foo: code for foo (text symbol)
2171 * Minimal symbol table for "shr1" image:
2173 * shr1: code for shr1 (text symbol)
2176 * So the code below is trying to detect if we are in the stub
2177 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2178 * and if found, do the symbolization from the real-code address
2179 * rather than the stub address.
2181 * Assumptions being made about the minimal symbol table:
2182 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2183 * if we're really in the trampoline. If we're beyond it (say
2184 * we're in "foo" in the above example), it'll have a closer
2185 * symbol (the "foo" text symbol for example) and will not
2186 * return the trampoline.
2187 * 2. lookup_minimal_symbol_text() will find a real text symbol
2188 * corresponding to the trampoline, and whose address will
2189 * be different than the trampoline address. I put in a sanity
2190 * check for the address being the same, to avoid an
2191 * infinite recursion.
2193 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2194 if (msymbol
!= NULL
)
2195 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2197 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2199 if (mfunsym
== NULL
)
2200 /* I eliminated this warning since it is coming out
2201 * in the following situation:
2202 * gdb shmain // test program with shared libraries
2203 * (gdb) break shr1 // function in shared lib
2204 * Warning: In stub for ...
2205 * In the above situation, the shared lib is not loaded yet,
2206 * so of course we can't find the real func/line info,
2207 * but the "break" still works, and the warning is annoying.
2208 * So I commented out the warning. RT */
2209 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2211 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
2212 /* Avoid infinite recursion */
2213 /* See above comment about why warning is commented out */
2214 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2217 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2221 s
= find_pc_sect_symtab (pc
, section
);
2224 /* if no symbol information, return previous pc */
2231 bv
= BLOCKVECTOR (s
);
2233 /* Look at all the symtabs that share this blockvector.
2234 They all have the same apriori range, that we found was right;
2235 but they have different line tables. */
2237 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2239 /* Find the best line in this symtab. */
2246 /* I think len can be zero if the symtab lacks line numbers
2247 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2248 I'm not sure which, and maybe it depends on the symbol
2254 item
= l
->item
; /* Get first line info */
2256 /* Is this file's first line closer than the first lines of other files?
2257 If so, record this file, and its first line, as best alternate. */
2258 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2264 for (i
= 0; i
< len
; i
++, item
++)
2266 /* Leave prev pointing to the linetable entry for the last line
2267 that started at or before PC. */
2274 /* At this point, prev points at the line whose start addr is <= pc, and
2275 item points at the next line. If we ran off the end of the linetable
2276 (pc >= start of the last line), then prev == item. If pc < start of
2277 the first line, prev will not be set. */
2279 /* Is this file's best line closer than the best in the other files?
2280 If so, record this file, and its best line, as best so far. Don't
2281 save prev if it represents the end of a function (i.e. line number
2282 0) instead of a real line. */
2284 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2289 /* Discard BEST_END if it's before the PC of the current BEST. */
2290 if (best_end
<= best
->pc
)
2294 /* If another line (denoted by ITEM) is in the linetable and its
2295 PC is after BEST's PC, but before the current BEST_END, then
2296 use ITEM's PC as the new best_end. */
2297 if (best
&& i
< len
&& item
->pc
> best
->pc
2298 && (best_end
== 0 || best_end
> item
->pc
))
2299 best_end
= item
->pc
;
2304 /* If we didn't find any line number info, just return zeros.
2305 We used to return alt->line - 1 here, but that could be
2306 anywhere; if we don't have line number info for this PC,
2307 don't make some up. */
2310 else if (best
->line
== 0)
2312 /* If our best fit is in a range of PC's for which no line
2313 number info is available (line number is zero) then we didn't
2314 find any valid line information. */
2319 val
.symtab
= best_symtab
;
2320 val
.line
= best
->line
;
2322 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2327 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2329 val
.section
= section
;
2333 /* Backward compatibility (no section) */
2335 struct symtab_and_line
2336 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2340 section
= find_pc_overlay (pc
);
2341 if (pc_in_unmapped_range (pc
, section
))
2342 pc
= overlay_mapped_address (pc
, section
);
2343 return find_pc_sect_line (pc
, section
, notcurrent
);
2346 /* Find line number LINE in any symtab whose name is the same as
2349 If found, return the symtab that contains the linetable in which it was
2350 found, set *INDEX to the index in the linetable of the best entry
2351 found, and set *EXACT_MATCH nonzero if the value returned is an
2354 If not found, return NULL. */
2357 find_line_symtab (struct symtab
*symtab
, int line
, int *index
, int *exact_match
)
2361 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2365 struct linetable
*best_linetable
;
2366 struct symtab
*best_symtab
;
2368 /* First try looking it up in the given symtab. */
2369 best_linetable
= LINETABLE (symtab
);
2370 best_symtab
= symtab
;
2371 best_index
= find_line_common (best_linetable
, line
, &exact
);
2372 if (best_index
< 0 || !exact
)
2374 /* Didn't find an exact match. So we better keep looking for
2375 another symtab with the same name. In the case of xcoff,
2376 multiple csects for one source file (produced by IBM's FORTRAN
2377 compiler) produce multiple symtabs (this is unavoidable
2378 assuming csects can be at arbitrary places in memory and that
2379 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2381 /* BEST is the smallest linenumber > LINE so far seen,
2382 or 0 if none has been seen so far.
2383 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2386 struct objfile
*objfile
;
2388 struct partial_symtab
*p
;
2390 if (best_index
>= 0)
2391 best
= best_linetable
->item
[best_index
].line
;
2395 ALL_PSYMTABS (objfile
, p
)
2397 if (strcmp (symtab
->filename
, p
->filename
) != 0)
2399 PSYMTAB_TO_SYMTAB (p
);
2402 ALL_SYMTABS (objfile
, s
)
2404 struct linetable
*l
;
2407 if (strcmp (symtab
->filename
, s
->filename
) != 0)
2410 ind
= find_line_common (l
, line
, &exact
);
2420 if (best
== 0 || l
->item
[ind
].line
< best
)
2422 best
= l
->item
[ind
].line
;
2435 *index
= best_index
;
2437 *exact_match
= exact
;
2442 /* Set the PC value for a given source file and line number and return true.
2443 Returns zero for invalid line number (and sets the PC to 0).
2444 The source file is specified with a struct symtab. */
2447 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2449 struct linetable
*l
;
2456 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2459 l
= LINETABLE (symtab
);
2460 *pc
= l
->item
[ind
].pc
;
2467 /* Find the range of pc values in a line.
2468 Store the starting pc of the line into *STARTPTR
2469 and the ending pc (start of next line) into *ENDPTR.
2470 Returns 1 to indicate success.
2471 Returns 0 if could not find the specified line. */
2474 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2477 CORE_ADDR startaddr
;
2478 struct symtab_and_line found_sal
;
2481 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2484 /* This whole function is based on address. For example, if line 10 has
2485 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2486 "info line *0x123" should say the line goes from 0x100 to 0x200
2487 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2488 This also insures that we never give a range like "starts at 0x134
2489 and ends at 0x12c". */
2491 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2492 if (found_sal
.line
!= sal
.line
)
2494 /* The specified line (sal) has zero bytes. */
2495 *startptr
= found_sal
.pc
;
2496 *endptr
= found_sal
.pc
;
2500 *startptr
= found_sal
.pc
;
2501 *endptr
= found_sal
.end
;
2506 /* Given a line table and a line number, return the index into the line
2507 table for the pc of the nearest line whose number is >= the specified one.
2508 Return -1 if none is found. The value is >= 0 if it is an index.
2510 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2513 find_line_common (struct linetable
*l
, int lineno
,
2519 /* BEST is the smallest linenumber > LINENO so far seen,
2520 or 0 if none has been seen so far.
2521 BEST_INDEX identifies the item for it. */
2523 int best_index
= -1;
2534 for (i
= 0; i
< len
; i
++)
2536 struct linetable_entry
*item
= &(l
->item
[i
]);
2538 if (item
->line
== lineno
)
2540 /* Return the first (lowest address) entry which matches. */
2545 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2552 /* If we got here, we didn't get an exact match. */
2557 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2559 struct symtab_and_line sal
;
2560 sal
= find_pc_line (pc
, 0);
2563 return sal
.symtab
!= 0;
2566 /* Given a function start address PC and SECTION, find the first
2567 address after the function prologue. */
2569 find_function_start_pc (struct gdbarch
*gdbarch
,
2570 CORE_ADDR pc
, asection
*section
)
2572 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2573 so that gdbarch_skip_prologue has something unique to work on. */
2574 if (section_is_overlay (section
) && !section_is_mapped (section
))
2575 pc
= overlay_unmapped_address (pc
, section
);
2577 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2578 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2580 /* For overlays, map pc back into its mapped VMA range. */
2581 pc
= overlay_mapped_address (pc
, section
);
2586 /* Given a function symbol SYM, find the symtab and line for the start
2588 If the argument FUNFIRSTLINE is nonzero, we want the first line
2589 of real code inside the function. */
2591 struct symtab_and_line
2592 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2594 struct block
*block
= SYMBOL_BLOCK_VALUE (sym
);
2595 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2596 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2599 struct symtab_and_line sal
;
2601 pc
= BLOCK_START (block
);
2602 fixup_symbol_section (sym
, objfile
);
2605 /* Skip "first line" of function (which is actually its prologue). */
2606 pc
= find_function_start_pc (gdbarch
, pc
, SYMBOL_BFD_SECTION (sym
));
2608 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2610 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2611 line is still part of the same function. */
2613 && BLOCK_START (block
) <= sal
.end
2614 && sal
.end
< BLOCK_END (block
))
2616 /* First pc of next line */
2618 /* Recalculate the line number (might not be N+1). */
2619 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2622 /* On targets with executable formats that don't have a concept of
2623 constructors (ELF with .init has, PE doesn't), gcc emits a call
2624 to `__main' in `main' between the prologue and before user
2627 && gdbarch_skip_main_prologue_p (current_gdbarch
)
2628 && SYMBOL_LINKAGE_NAME (sym
)
2629 && strcmp (SYMBOL_LINKAGE_NAME (sym
), "main") == 0)
2631 pc
= gdbarch_skip_main_prologue (current_gdbarch
, pc
);
2632 /* Recalculate the line number (might not be N+1). */
2633 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2641 /* If P is of the form "operator[ \t]+..." where `...' is
2642 some legitimate operator text, return a pointer to the
2643 beginning of the substring of the operator text.
2644 Otherwise, return "". */
2646 operator_chars (char *p
, char **end
)
2649 if (strncmp (p
, "operator", 8))
2653 /* Don't get faked out by `operator' being part of a longer
2655 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2658 /* Allow some whitespace between `operator' and the operator symbol. */
2659 while (*p
== ' ' || *p
== '\t')
2662 /* Recognize 'operator TYPENAME'. */
2664 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2667 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2676 case '\\': /* regexp quoting */
2679 if (p
[2] == '=') /* 'operator\*=' */
2681 else /* 'operator\*' */
2685 else if (p
[1] == '[')
2688 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2689 else if (p
[2] == '\\' && p
[3] == ']')
2691 *end
= p
+ 4; /* 'operator\[\]' */
2695 error (_("nothing is allowed between '[' and ']'"));
2699 /* Gratuitous qoute: skip it and move on. */
2721 if (p
[0] == '-' && p
[1] == '>')
2723 /* Struct pointer member operator 'operator->'. */
2726 *end
= p
+ 3; /* 'operator->*' */
2729 else if (p
[2] == '\\')
2731 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2736 *end
= p
+ 2; /* 'operator->' */
2740 if (p
[1] == '=' || p
[1] == p
[0])
2751 error (_("`operator ()' must be specified without whitespace in `()'"));
2756 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2761 error (_("`operator []' must be specified without whitespace in `[]'"));
2765 error (_("`operator %s' not supported"), p
);
2774 /* If FILE is not already in the table of files, return zero;
2775 otherwise return non-zero. Optionally add FILE to the table if ADD
2776 is non-zero. If *FIRST is non-zero, forget the old table
2779 filename_seen (const char *file
, int add
, int *first
)
2781 /* Table of files seen so far. */
2782 static const char **tab
= NULL
;
2783 /* Allocated size of tab in elements.
2784 Start with one 256-byte block (when using GNU malloc.c).
2785 24 is the malloc overhead when range checking is in effect. */
2786 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2787 /* Current size of tab in elements. */
2788 static int tab_cur_size
;
2794 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2798 /* Is FILE in tab? */
2799 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2800 if (strcmp (*p
, file
) == 0)
2803 /* No; maybe add it to tab. */
2806 if (tab_cur_size
== tab_alloc_size
)
2808 tab_alloc_size
*= 2;
2809 tab
= (const char **) xrealloc ((char *) tab
,
2810 tab_alloc_size
* sizeof (*tab
));
2812 tab
[tab_cur_size
++] = file
;
2818 /* Slave routine for sources_info. Force line breaks at ,'s.
2819 NAME is the name to print and *FIRST is nonzero if this is the first
2820 name printed. Set *FIRST to zero. */
2822 output_source_filename (const char *name
, int *first
)
2824 /* Since a single source file can result in several partial symbol
2825 tables, we need to avoid printing it more than once. Note: if
2826 some of the psymtabs are read in and some are not, it gets
2827 printed both under "Source files for which symbols have been
2828 read" and "Source files for which symbols will be read in on
2829 demand". I consider this a reasonable way to deal with the
2830 situation. I'm not sure whether this can also happen for
2831 symtabs; it doesn't hurt to check. */
2833 /* Was NAME already seen? */
2834 if (filename_seen (name
, 1, first
))
2836 /* Yes; don't print it again. */
2839 /* No; print it and reset *FIRST. */
2846 printf_filtered (", ");
2850 fputs_filtered (name
, gdb_stdout
);
2854 sources_info (char *ignore
, int from_tty
)
2857 struct partial_symtab
*ps
;
2858 struct objfile
*objfile
;
2861 if (!have_full_symbols () && !have_partial_symbols ())
2863 error (_("No symbol table is loaded. Use the \"file\" command."));
2866 printf_filtered ("Source files for which symbols have been read in:\n\n");
2869 ALL_SYMTABS (objfile
, s
)
2871 const char *fullname
= symtab_to_fullname (s
);
2872 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2874 printf_filtered ("\n\n");
2876 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2879 ALL_PSYMTABS (objfile
, ps
)
2883 const char *fullname
= psymtab_to_fullname (ps
);
2884 output_source_filename (fullname
? fullname
: ps
->filename
, &first
);
2887 printf_filtered ("\n");
2891 file_matches (char *file
, char *files
[], int nfiles
)
2895 if (file
!= NULL
&& nfiles
!= 0)
2897 for (i
= 0; i
< nfiles
; i
++)
2899 if (strcmp (files
[i
], lbasename (file
)) == 0)
2903 else if (nfiles
== 0)
2908 /* Free any memory associated with a search. */
2910 free_search_symbols (struct symbol_search
*symbols
)
2912 struct symbol_search
*p
;
2913 struct symbol_search
*next
;
2915 for (p
= symbols
; p
!= NULL
; p
= next
)
2923 do_free_search_symbols_cleanup (void *symbols
)
2925 free_search_symbols (symbols
);
2929 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2931 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2934 /* Helper function for sort_search_symbols and qsort. Can only
2935 sort symbols, not minimal symbols. */
2937 compare_search_syms (const void *sa
, const void *sb
)
2939 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2940 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2942 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2943 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2946 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2947 prevtail where it is, but update its next pointer to point to
2948 the first of the sorted symbols. */
2949 static struct symbol_search
*
2950 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2952 struct symbol_search
**symbols
, *symp
, *old_next
;
2955 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2957 symp
= prevtail
->next
;
2958 for (i
= 0; i
< nfound
; i
++)
2963 /* Generally NULL. */
2966 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2967 compare_search_syms
);
2970 for (i
= 0; i
< nfound
; i
++)
2972 symp
->next
= symbols
[i
];
2975 symp
->next
= old_next
;
2981 /* Search the symbol table for matches to the regular expression REGEXP,
2982 returning the results in *MATCHES.
2984 Only symbols of KIND are searched:
2985 FUNCTIONS_DOMAIN - search all functions
2986 TYPES_DOMAIN - search all type names
2987 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2988 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2989 and constants (enums)
2991 free_search_symbols should be called when *MATCHES is no longer needed.
2993 The results are sorted locally; each symtab's global and static blocks are
2994 separately alphabetized.
2997 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
2998 struct symbol_search
**matches
)
3001 struct partial_symtab
*ps
;
3002 struct blockvector
*bv
;
3005 struct dict_iterator iter
;
3007 struct partial_symbol
**psym
;
3008 struct objfile
*objfile
;
3009 struct minimal_symbol
*msymbol
;
3012 static enum minimal_symbol_type types
[]
3014 {mst_data
, mst_text
, mst_abs
, mst_unknown
};
3015 static enum minimal_symbol_type types2
[]
3017 {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
3018 static enum minimal_symbol_type types3
[]
3020 {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
3021 static enum minimal_symbol_type types4
[]
3023 {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
3024 enum minimal_symbol_type ourtype
;
3025 enum minimal_symbol_type ourtype2
;
3026 enum minimal_symbol_type ourtype3
;
3027 enum minimal_symbol_type ourtype4
;
3028 struct symbol_search
*sr
;
3029 struct symbol_search
*psr
;
3030 struct symbol_search
*tail
;
3031 struct cleanup
*old_chain
= NULL
;
3033 if (kind
< VARIABLES_DOMAIN
)
3034 error (_("must search on specific domain"));
3036 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3037 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3038 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3039 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3041 sr
= *matches
= NULL
;
3046 /* Make sure spacing is right for C++ operators.
3047 This is just a courtesy to make the matching less sensitive
3048 to how many spaces the user leaves between 'operator'
3049 and <TYPENAME> or <OPERATOR>. */
3051 char *opname
= operator_chars (regexp
, &opend
);
3054 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
3055 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3057 /* There should 1 space between 'operator' and 'TYPENAME'. */
3058 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3063 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3064 if (opname
[-1] == ' ')
3067 /* If wrong number of spaces, fix it. */
3070 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3071 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3076 if (0 != (val
= re_comp (regexp
)))
3077 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3080 /* Search through the partial symtabs *first* for all symbols
3081 matching the regexp. That way we don't have to reproduce all of
3082 the machinery below. */
3084 ALL_PSYMTABS (objfile
, ps
)
3086 struct partial_symbol
**bound
, **gbound
, **sbound
;
3092 gbound
= objfile
->global_psymbols
.list
+ ps
->globals_offset
+ ps
->n_global_syms
;
3093 sbound
= objfile
->static_psymbols
.list
+ ps
->statics_offset
+ ps
->n_static_syms
;
3096 /* Go through all of the symbols stored in a partial
3097 symtab in one loop. */
3098 psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3103 if (bound
== gbound
&& ps
->n_static_syms
!= 0)
3105 psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3116 /* If it would match (logic taken from loop below)
3117 load the file and go on to the next one. We check the
3118 filename here, but that's a bit bogus: we don't know
3119 what file it really comes from until we have full
3120 symtabs. The symbol might be in a header file included by
3121 this psymtab. This only affects Insight. */
3122 if (file_matches (ps
->filename
, files
, nfiles
)
3124 || re_exec (SYMBOL_NATURAL_NAME (*psym
)) != 0)
3125 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (*psym
) != LOC_TYPEDEF
3126 && SYMBOL_CLASS (*psym
) != LOC_BLOCK
)
3127 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
)
3128 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_TYPEDEF
)
3129 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
))))
3131 PSYMTAB_TO_SYMTAB (ps
);
3139 /* Here, we search through the minimal symbol tables for functions
3140 and variables that match, and force their symbols to be read.
3141 This is in particular necessary for demangled variable names,
3142 which are no longer put into the partial symbol tables.
3143 The symbol will then be found during the scan of symtabs below.
3145 For functions, find_pc_symtab should succeed if we have debug info
3146 for the function, for variables we have to call lookup_symbol
3147 to determine if the variable has debug info.
3148 If the lookup fails, set found_misc so that we will rescan to print
3149 any matching symbols without debug info.
3152 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3154 ALL_MSYMBOLS (objfile
, msymbol
)
3156 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3157 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3158 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3159 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3162 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3164 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3166 /* FIXME: carlton/2003-02-04: Given that the
3167 semantics of lookup_symbol keeps on changing
3168 slightly, it would be a nice idea if we had a
3169 function lookup_symbol_minsym that found the
3170 symbol associated to a given minimal symbol (if
3172 if (kind
== FUNCTIONS_DOMAIN
3173 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3174 (struct block
*) NULL
,
3184 ALL_PRIMARY_SYMTABS (objfile
, s
)
3186 bv
= BLOCKVECTOR (s
);
3187 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3189 struct symbol_search
*prevtail
= tail
;
3191 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3192 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3194 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3197 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3199 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3200 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3201 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3202 && SYMBOL_CLASS (sym
) != LOC_CONST
)
3203 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3204 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3205 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
))))
3208 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3210 psr
->symtab
= real_symtab
;
3212 psr
->msymbol
= NULL
;
3224 if (prevtail
== NULL
)
3226 struct symbol_search dummy
;
3229 tail
= sort_search_symbols (&dummy
, nfound
);
3232 old_chain
= make_cleanup_free_search_symbols (sr
);
3235 tail
= sort_search_symbols (prevtail
, nfound
);
3240 /* If there are no eyes, avoid all contact. I mean, if there are
3241 no debug symbols, then print directly from the msymbol_vector. */
3243 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3245 ALL_MSYMBOLS (objfile
, msymbol
)
3247 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3248 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3249 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3250 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3253 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3255 /* Functions: Look up by address. */
3256 if (kind
!= FUNCTIONS_DOMAIN
||
3257 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3259 /* Variables/Absolutes: Look up by name */
3260 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3261 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3265 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3267 psr
->msymbol
= msymbol
;
3274 old_chain
= make_cleanup_free_search_symbols (sr
);
3288 discard_cleanups (old_chain
);
3291 /* Helper function for symtab_symbol_info, this function uses
3292 the data returned from search_symbols() to print information
3293 regarding the match to gdb_stdout.
3296 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3297 int block
, char *last
)
3299 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3301 fputs_filtered ("\nFile ", gdb_stdout
);
3302 fputs_filtered (s
->filename
, gdb_stdout
);
3303 fputs_filtered (":\n", gdb_stdout
);
3306 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3307 printf_filtered ("static ");
3309 /* Typedef that is not a C++ class */
3310 if (kind
== TYPES_DOMAIN
3311 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3312 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3313 /* variable, func, or typedef-that-is-c++-class */
3314 else if (kind
< TYPES_DOMAIN
||
3315 (kind
== TYPES_DOMAIN
&&
3316 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3318 type_print (SYMBOL_TYPE (sym
),
3319 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3320 ? "" : SYMBOL_PRINT_NAME (sym
)),
3323 printf_filtered (";\n");
3327 /* This help function for symtab_symbol_info() prints information
3328 for non-debugging symbols to gdb_stdout.
3331 print_msymbol_info (struct minimal_symbol
*msymbol
)
3335 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3336 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3337 & (CORE_ADDR
) 0xffffffff,
3340 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3342 printf_filtered ("%s %s\n",
3343 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3346 /* This is the guts of the commands "info functions", "info types", and
3347 "info variables". It calls search_symbols to find all matches and then
3348 print_[m]symbol_info to print out some useful information about the
3352 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3354 static char *classnames
[]
3356 {"variable", "function", "type", "method"};
3357 struct symbol_search
*symbols
;
3358 struct symbol_search
*p
;
3359 struct cleanup
*old_chain
;
3360 char *last_filename
= NULL
;
3363 /* must make sure that if we're interrupted, symbols gets freed */
3364 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3365 old_chain
= make_cleanup_free_search_symbols (symbols
);
3367 printf_filtered (regexp
3368 ? "All %ss matching regular expression \"%s\":\n"
3369 : "All defined %ss:\n",
3370 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3372 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3376 if (p
->msymbol
!= NULL
)
3380 printf_filtered ("\nNon-debugging symbols:\n");
3383 print_msymbol_info (p
->msymbol
);
3387 print_symbol_info (kind
,
3392 last_filename
= p
->symtab
->filename
;
3396 do_cleanups (old_chain
);
3400 variables_info (char *regexp
, int from_tty
)
3402 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3406 functions_info (char *regexp
, int from_tty
)
3408 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3413 types_info (char *regexp
, int from_tty
)
3415 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3418 /* Breakpoint all functions matching regular expression. */
3421 rbreak_command_wrapper (char *regexp
, int from_tty
)
3423 rbreak_command (regexp
, from_tty
);
3427 rbreak_command (char *regexp
, int from_tty
)
3429 struct symbol_search
*ss
;
3430 struct symbol_search
*p
;
3431 struct cleanup
*old_chain
;
3433 search_symbols (regexp
, FUNCTIONS_DOMAIN
, 0, (char **) NULL
, &ss
);
3434 old_chain
= make_cleanup_free_search_symbols (ss
);
3436 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3438 if (p
->msymbol
== NULL
)
3440 char *string
= alloca (strlen (p
->symtab
->filename
)
3441 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3443 strcpy (string
, p
->symtab
->filename
);
3444 strcat (string
, ":'");
3445 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3446 strcat (string
, "'");
3447 break_command (string
, from_tty
);
3448 print_symbol_info (FUNCTIONS_DOMAIN
,
3452 p
->symtab
->filename
);
3456 char *string
= alloca (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
))
3458 strcpy (string
, "'");
3459 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3460 strcat (string
, "'");
3462 break_command (string
, from_tty
);
3463 printf_filtered ("<function, no debug info> %s;\n",
3464 SYMBOL_PRINT_NAME (p
->msymbol
));
3468 do_cleanups (old_chain
);
3472 /* Helper routine for make_symbol_completion_list. */
3474 static int return_val_size
;
3475 static int return_val_index
;
3476 static char **return_val
;
3478 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3479 completion_list_add_name \
3480 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3482 /* Test to see if the symbol specified by SYMNAME (which is already
3483 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3484 characters. If so, add it to the current completion list. */
3487 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3488 char *text
, char *word
)
3493 /* clip symbols that cannot match */
3495 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3500 /* We have a match for a completion, so add SYMNAME to the current list
3501 of matches. Note that the name is moved to freshly malloc'd space. */
3505 if (word
== sym_text
)
3507 new = xmalloc (strlen (symname
) + 5);
3508 strcpy (new, symname
);
3510 else if (word
> sym_text
)
3512 /* Return some portion of symname. */
3513 new = xmalloc (strlen (symname
) + 5);
3514 strcpy (new, symname
+ (word
- sym_text
));
3518 /* Return some of SYM_TEXT plus symname. */
3519 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3520 strncpy (new, word
, sym_text
- word
);
3521 new[sym_text
- word
] = '\0';
3522 strcat (new, symname
);
3525 if (return_val_index
+ 3 > return_val_size
)
3527 newsize
= (return_val_size
*= 2) * sizeof (char *);
3528 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3530 return_val
[return_val_index
++] = new;
3531 return_val
[return_val_index
] = NULL
;
3535 /* ObjC: In case we are completing on a selector, look as the msymbol
3536 again and feed all the selectors into the mill. */
3539 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3540 int sym_text_len
, char *text
, char *word
)
3542 static char *tmp
= NULL
;
3543 static unsigned int tmplen
= 0;
3545 char *method
, *category
, *selector
;
3548 method
= SYMBOL_NATURAL_NAME (msymbol
);
3550 /* Is it a method? */
3551 if ((method
[0] != '-') && (method
[0] != '+'))
3554 if (sym_text
[0] == '[')
3555 /* Complete on shortened method method. */
3556 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3558 while ((strlen (method
) + 1) >= tmplen
)
3564 tmp
= xrealloc (tmp
, tmplen
);
3566 selector
= strchr (method
, ' ');
3567 if (selector
!= NULL
)
3570 category
= strchr (method
, '(');
3572 if ((category
!= NULL
) && (selector
!= NULL
))
3574 memcpy (tmp
, method
, (category
- method
));
3575 tmp
[category
- method
] = ' ';
3576 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3577 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3578 if (sym_text
[0] == '[')
3579 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3582 if (selector
!= NULL
)
3584 /* Complete on selector only. */
3585 strcpy (tmp
, selector
);
3586 tmp2
= strchr (tmp
, ']');
3590 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3594 /* Break the non-quoted text based on the characters which are in
3595 symbols. FIXME: This should probably be language-specific. */
3598 language_search_unquoted_string (char *text
, char *p
)
3600 for (; p
> text
; --p
)
3602 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3606 if ((current_language
->la_language
== language_objc
))
3608 if (p
[-1] == ':') /* might be part of a method name */
3610 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3611 p
-= 2; /* beginning of a method name */
3612 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3613 { /* might be part of a method name */
3616 /* Seeing a ' ' or a '(' is not conclusive evidence
3617 that we are in the middle of a method name. However,
3618 finding "-[" or "+[" should be pretty un-ambiguous.
3619 Unfortunately we have to find it now to decide. */
3622 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3623 t
[-1] == ' ' || t
[-1] == ':' ||
3624 t
[-1] == '(' || t
[-1] == ')')
3629 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3630 p
= t
- 2; /* method name detected */
3631 /* else we leave with p unchanged */
3641 default_make_symbol_completion_list (char *text
, char *word
)
3643 /* Problem: All of the symbols have to be copied because readline
3644 frees them. I'm not going to worry about this; hopefully there
3645 won't be that many. */
3649 struct partial_symtab
*ps
;
3650 struct minimal_symbol
*msymbol
;
3651 struct objfile
*objfile
;
3652 struct block
*b
, *surrounding_static_block
= 0;
3653 struct dict_iterator iter
;
3655 struct partial_symbol
**psym
;
3656 /* The symbol we are completing on. Points in same buffer as text. */
3658 /* Length of sym_text. */
3661 /* Now look for the symbol we are supposed to complete on. */
3665 char *quote_pos
= NULL
;
3667 /* First see if this is a quoted string. */
3669 for (p
= text
; *p
!= '\0'; ++p
)
3671 if (quote_found
!= '\0')
3673 if (*p
== quote_found
)
3674 /* Found close quote. */
3676 else if (*p
== '\\' && p
[1] == quote_found
)
3677 /* A backslash followed by the quote character
3678 doesn't end the string. */
3681 else if (*p
== '\'' || *p
== '"')
3687 if (quote_found
== '\'')
3688 /* A string within single quotes can be a symbol, so complete on it. */
3689 sym_text
= quote_pos
+ 1;
3690 else if (quote_found
== '"')
3691 /* A double-quoted string is never a symbol, nor does it make sense
3692 to complete it any other way. */
3694 return_val
= (char **) xmalloc (sizeof (char *));
3695 return_val
[0] = NULL
;
3700 /* It is not a quoted string. Break it based on the characters
3701 which are in symbols. */
3704 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3713 sym_text_len
= strlen (sym_text
);
3715 return_val_size
= 100;
3716 return_val_index
= 0;
3717 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3718 return_val
[0] = NULL
;
3720 /* Look through the partial symtabs for all symbols which begin
3721 by matching SYM_TEXT. Add each one that you find to the list. */
3723 ALL_PSYMTABS (objfile
, ps
)
3725 /* If the psymtab's been read in we'll get it when we search
3726 through the blockvector. */
3730 for (psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3731 psym
< (objfile
->global_psymbols
.list
+ ps
->globals_offset
3732 + ps
->n_global_syms
);
3735 /* If interrupted, then quit. */
3737 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3740 for (psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3741 psym
< (objfile
->static_psymbols
.list
+ ps
->statics_offset
3742 + ps
->n_static_syms
);
3746 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3750 /* At this point scan through the misc symbol vectors and add each
3751 symbol you find to the list. Eventually we want to ignore
3752 anything that isn't a text symbol (everything else will be
3753 handled by the psymtab code above). */
3755 ALL_MSYMBOLS (objfile
, msymbol
)
3758 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3760 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3763 /* Search upwards from currently selected frame (so that we can
3764 complete on local vars. */
3766 for (b
= get_selected_block (0); b
!= NULL
; b
= BLOCK_SUPERBLOCK (b
))
3768 if (!BLOCK_SUPERBLOCK (b
))
3770 surrounding_static_block
= b
; /* For elmin of dups */
3773 /* Also catch fields of types defined in this places which match our
3774 text string. Only complete on types visible from current context. */
3776 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3779 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3780 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3782 struct type
*t
= SYMBOL_TYPE (sym
);
3783 enum type_code c
= TYPE_CODE (t
);
3785 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3787 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3789 if (TYPE_FIELD_NAME (t
, j
))
3791 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3792 sym_text
, sym_text_len
, text
, word
);
3800 /* Go through the symtabs and check the externs and statics for
3801 symbols which match. */
3803 ALL_PRIMARY_SYMTABS (objfile
, s
)
3806 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3807 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3809 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3813 ALL_PRIMARY_SYMTABS (objfile
, s
)
3816 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3817 /* Don't do this block twice. */
3818 if (b
== surrounding_static_block
)
3820 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3822 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3826 return (return_val
);
3829 /* Return a NULL terminated array of all symbols (regardless of class)
3830 which begin by matching TEXT. If the answer is no symbols, then
3831 the return value is an array which contains only a NULL pointer. */
3834 make_symbol_completion_list (char *text
, char *word
)
3836 return current_language
->la_make_symbol_completion_list (text
, word
);
3839 /* Like make_symbol_completion_list, but returns a list of symbols
3840 defined in a source file FILE. */
3843 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3848 struct dict_iterator iter
;
3849 /* The symbol we are completing on. Points in same buffer as text. */
3851 /* Length of sym_text. */
3854 /* Now look for the symbol we are supposed to complete on.
3855 FIXME: This should be language-specific. */
3859 char *quote_pos
= NULL
;
3861 /* First see if this is a quoted string. */
3863 for (p
= text
; *p
!= '\0'; ++p
)
3865 if (quote_found
!= '\0')
3867 if (*p
== quote_found
)
3868 /* Found close quote. */
3870 else if (*p
== '\\' && p
[1] == quote_found
)
3871 /* A backslash followed by the quote character
3872 doesn't end the string. */
3875 else if (*p
== '\'' || *p
== '"')
3881 if (quote_found
== '\'')
3882 /* A string within single quotes can be a symbol, so complete on it. */
3883 sym_text
= quote_pos
+ 1;
3884 else if (quote_found
== '"')
3885 /* A double-quoted string is never a symbol, nor does it make sense
3886 to complete it any other way. */
3888 return_val
= (char **) xmalloc (sizeof (char *));
3889 return_val
[0] = NULL
;
3894 /* Not a quoted string. */
3895 sym_text
= language_search_unquoted_string (text
, p
);
3899 sym_text_len
= strlen (sym_text
);
3901 return_val_size
= 10;
3902 return_val_index
= 0;
3903 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3904 return_val
[0] = NULL
;
3906 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3908 s
= lookup_symtab (srcfile
);
3911 /* Maybe they typed the file with leading directories, while the
3912 symbol tables record only its basename. */
3913 const char *tail
= lbasename (srcfile
);
3916 s
= lookup_symtab (tail
);
3919 /* If we have no symtab for that file, return an empty list. */
3921 return (return_val
);
3923 /* Go through this symtab and check the externs and statics for
3924 symbols which match. */
3926 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3927 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3929 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3932 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3933 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3935 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3938 return (return_val
);
3941 /* A helper function for make_source_files_completion_list. It adds
3942 another file name to a list of possible completions, growing the
3943 list as necessary. */
3946 add_filename_to_list (const char *fname
, char *text
, char *word
,
3947 char ***list
, int *list_used
, int *list_alloced
)
3950 size_t fnlen
= strlen (fname
);
3952 if (*list_used
+ 1 >= *list_alloced
)
3955 *list
= (char **) xrealloc ((char *) *list
,
3956 *list_alloced
* sizeof (char *));
3961 /* Return exactly fname. */
3962 new = xmalloc (fnlen
+ 5);
3963 strcpy (new, fname
);
3965 else if (word
> text
)
3967 /* Return some portion of fname. */
3968 new = xmalloc (fnlen
+ 5);
3969 strcpy (new, fname
+ (word
- text
));
3973 /* Return some of TEXT plus fname. */
3974 new = xmalloc (fnlen
+ (text
- word
) + 5);
3975 strncpy (new, word
, text
- word
);
3976 new[text
- word
] = '\0';
3977 strcat (new, fname
);
3979 (*list
)[*list_used
] = new;
3980 (*list
)[++*list_used
] = NULL
;
3984 not_interesting_fname (const char *fname
)
3986 static const char *illegal_aliens
[] = {
3987 "_globals_", /* inserted by coff_symtab_read */
3992 for (i
= 0; illegal_aliens
[i
]; i
++)
3994 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
4000 /* Return a NULL terminated array of all source files whose names
4001 begin with matching TEXT. The file names are looked up in the
4002 symbol tables of this program. If the answer is no matchess, then
4003 the return value is an array which contains only a NULL pointer. */
4006 make_source_files_completion_list (char *text
, char *word
)
4009 struct partial_symtab
*ps
;
4010 struct objfile
*objfile
;
4012 int list_alloced
= 1;
4014 size_t text_len
= strlen (text
);
4015 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4016 const char *base_name
;
4020 if (!have_full_symbols () && !have_partial_symbols ())
4023 ALL_SYMTABS (objfile
, s
)
4025 if (not_interesting_fname (s
->filename
))
4027 if (!filename_seen (s
->filename
, 1, &first
)
4028 #if HAVE_DOS_BASED_FILE_SYSTEM
4029 && strncasecmp (s
->filename
, text
, text_len
) == 0
4031 && strncmp (s
->filename
, text
, text_len
) == 0
4035 /* This file matches for a completion; add it to the current
4037 add_filename_to_list (s
->filename
, text
, word
,
4038 &list
, &list_used
, &list_alloced
);
4042 /* NOTE: We allow the user to type a base name when the
4043 debug info records leading directories, but not the other
4044 way around. This is what subroutines of breakpoint
4045 command do when they parse file names. */
4046 base_name
= lbasename (s
->filename
);
4047 if (base_name
!= s
->filename
4048 && !filename_seen (base_name
, 1, &first
)
4049 #if HAVE_DOS_BASED_FILE_SYSTEM
4050 && strncasecmp (base_name
, text
, text_len
) == 0
4052 && strncmp (base_name
, text
, text_len
) == 0
4055 add_filename_to_list (base_name
, text
, word
,
4056 &list
, &list_used
, &list_alloced
);
4060 ALL_PSYMTABS (objfile
, ps
)
4062 if (not_interesting_fname (ps
->filename
))
4066 if (!filename_seen (ps
->filename
, 1, &first
)
4067 #if HAVE_DOS_BASED_FILE_SYSTEM
4068 && strncasecmp (ps
->filename
, text
, text_len
) == 0
4070 && strncmp (ps
->filename
, text
, text_len
) == 0
4074 /* This file matches for a completion; add it to the
4075 current list of matches. */
4076 add_filename_to_list (ps
->filename
, text
, word
,
4077 &list
, &list_used
, &list_alloced
);
4082 base_name
= lbasename (ps
->filename
);
4083 if (base_name
!= ps
->filename
4084 && !filename_seen (base_name
, 1, &first
)
4085 #if HAVE_DOS_BASED_FILE_SYSTEM
4086 && strncasecmp (base_name
, text
, text_len
) == 0
4088 && strncmp (base_name
, text
, text_len
) == 0
4091 add_filename_to_list (base_name
, text
, word
,
4092 &list
, &list_used
, &list_alloced
);
4100 /* Determine if PC is in the prologue of a function. The prologue is the area
4101 between the first instruction of a function, and the first executable line.
4102 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4104 If non-zero, func_start is where we think the prologue starts, possibly
4105 by previous examination of symbol table information.
4109 in_prologue (CORE_ADDR pc
, CORE_ADDR func_start
)
4111 struct symtab_and_line sal
;
4112 CORE_ADDR func_addr
, func_end
;
4114 /* We have several sources of information we can consult to figure
4116 - Compilers usually emit line number info that marks the prologue
4117 as its own "source line". So the ending address of that "line"
4118 is the end of the prologue. If available, this is the most
4120 - The minimal symbols and partial symbols, which can usually tell
4121 us the starting and ending addresses of a function.
4122 - If we know the function's start address, we can call the
4123 architecture-defined gdbarch_skip_prologue function to analyze the
4124 instruction stream and guess where the prologue ends.
4125 - Our `func_start' argument; if non-zero, this is the caller's
4126 best guess as to the function's entry point. At the time of
4127 this writing, handle_inferior_event doesn't get this right, so
4128 it should be our last resort. */
4130 /* Consult the partial symbol table, to find which function
4132 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4134 CORE_ADDR prologue_end
;
4136 /* We don't even have minsym information, so fall back to using
4137 func_start, if given. */
4139 return 1; /* We *might* be in a prologue. */
4141 prologue_end
= gdbarch_skip_prologue (current_gdbarch
, func_start
);
4143 return func_start
<= pc
&& pc
< prologue_end
;
4146 /* If we have line number information for the function, that's
4147 usually pretty reliable. */
4148 sal
= find_pc_line (func_addr
, 0);
4150 /* Now sal describes the source line at the function's entry point,
4151 which (by convention) is the prologue. The end of that "line",
4152 sal.end, is the end of the prologue.
4154 Note that, for functions whose source code is all on a single
4155 line, the line number information doesn't always end up this way.
4156 So we must verify that our purported end-of-prologue address is
4157 *within* the function, not at its start or end. */
4159 || sal
.end
<= func_addr
4160 || func_end
<= sal
.end
)
4162 /* We don't have any good line number info, so use the minsym
4163 information, together with the architecture-specific prologue
4165 CORE_ADDR prologue_end
= gdbarch_skip_prologue
4166 (current_gdbarch
, func_addr
);
4168 return func_addr
<= pc
&& pc
< prologue_end
;
4171 /* We have line number info, and it looks good. */
4172 return func_addr
<= pc
&& pc
< sal
.end
;
4175 /* Given PC at the function's start address, attempt to find the
4176 prologue end using SAL information. Return zero if the skip fails.
4178 A non-optimized prologue traditionally has one SAL for the function
4179 and a second for the function body. A single line function has
4180 them both pointing at the same line.
4182 An optimized prologue is similar but the prologue may contain
4183 instructions (SALs) from the instruction body. Need to skip those
4184 while not getting into the function body.
4186 The functions end point and an increasing SAL line are used as
4187 indicators of the prologue's endpoint.
4189 This code is based on the function refine_prologue_limit (versions
4190 found in both ia64 and ppc). */
4193 skip_prologue_using_sal (CORE_ADDR func_addr
)
4195 struct symtab_and_line prologue_sal
;
4199 /* Get an initial range for the function. */
4200 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4201 start_pc
+= gdbarch_deprecated_function_start_offset (current_gdbarch
);
4203 prologue_sal
= find_pc_line (start_pc
, 0);
4204 if (prologue_sal
.line
!= 0)
4206 /* If there is only one sal that covers the entire function,
4207 then it is probably a single line function, like
4209 if (prologue_sal
.end
>= end_pc
)
4211 while (prologue_sal
.end
< end_pc
)
4213 struct symtab_and_line sal
;
4215 sal
= find_pc_line (prologue_sal
.end
, 0);
4218 /* Assume that a consecutive SAL for the same (or larger)
4219 line mark the prologue -> body transition. */
4220 if (sal
.line
>= prologue_sal
.line
)
4222 /* The case in which compiler's optimizer/scheduler has
4223 moved instructions into the prologue. We look ahead in
4224 the function looking for address ranges whose
4225 corresponding line number is less the first one that we
4226 found for the function. This is more conservative then
4227 refine_prologue_limit which scans a large number of SALs
4228 looking for any in the prologue */
4232 return prologue_sal
.end
;
4235 struct symtabs_and_lines
4236 decode_line_spec (char *string
, int funfirstline
)
4238 struct symtabs_and_lines sals
;
4239 struct symtab_and_line cursal
;
4242 error (_("Empty line specification."));
4244 /* We use whatever is set as the current source line. We do not try
4245 and get a default or it will recursively call us! */
4246 cursal
= get_current_source_symtab_and_line ();
4248 sals
= decode_line_1 (&string
, funfirstline
,
4249 cursal
.symtab
, cursal
.line
,
4250 (char ***) NULL
, NULL
);
4253 error (_("Junk at end of line specification: %s"), string
);
4258 static char *name_of_main
;
4261 set_main_name (const char *name
)
4263 if (name_of_main
!= NULL
)
4265 xfree (name_of_main
);
4266 name_of_main
= NULL
;
4270 name_of_main
= xstrdup (name
);
4274 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4278 find_main_name (void)
4280 const char *new_main_name
;
4282 /* Try to see if the main procedure is in Ada. */
4283 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4284 be to add a new method in the language vector, and call this
4285 method for each language until one of them returns a non-empty
4286 name. This would allow us to remove this hard-coded call to
4287 an Ada function. It is not clear that this is a better approach
4288 at this point, because all methods need to be written in a way
4289 such that false positives never be returned. For instance, it is
4290 important that a method does not return a wrong name for the main
4291 procedure if the main procedure is actually written in a different
4292 language. It is easy to guaranty this with Ada, since we use a
4293 special symbol generated only when the main in Ada to find the name
4294 of the main procedure. It is difficult however to see how this can
4295 be guarantied for languages such as C, for instance. This suggests
4296 that order of call for these methods becomes important, which means
4297 a more complicated approach. */
4298 new_main_name
= ada_main_name ();
4299 if (new_main_name
!= NULL
)
4301 set_main_name (new_main_name
);
4305 new_main_name
= pascal_main_name ();
4306 if (new_main_name
!= NULL
)
4308 set_main_name (new_main_name
);
4312 /* The languages above didn't identify the name of the main procedure.
4313 Fallback to "main". */
4314 set_main_name ("main");
4320 if (name_of_main
== NULL
)
4323 return name_of_main
;
4326 /* Handle ``executable_changed'' events for the symtab module. */
4329 symtab_observer_executable_changed (void)
4331 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4332 set_main_name (NULL
);
4335 /* Helper to expand_line_sal below. Appends new sal to SAL,
4336 initializing it from SYMTAB, LINENO and PC. */
4338 append_expanded_sal (struct symtabs_and_lines
*sal
,
4339 struct symtab
*symtab
,
4340 int lineno
, CORE_ADDR pc
)
4342 CORE_ADDR func_addr
, func_end
;
4344 sal
->sals
= xrealloc (sal
->sals
,
4345 sizeof (sal
->sals
[0])
4346 * (sal
->nelts
+ 1));
4347 init_sal (sal
->sals
+ sal
->nelts
);
4348 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4349 sal
->sals
[sal
->nelts
].section
= NULL
;
4350 sal
->sals
[sal
->nelts
].end
= 0;
4351 sal
->sals
[sal
->nelts
].line
= lineno
;
4352 sal
->sals
[sal
->nelts
].pc
= pc
;
4356 /* Compute a set of all sals in
4357 the entire program that correspond to same file
4358 and line as SAL and return those. If there
4359 are several sals that belong to the same block,
4360 only one sal for the block is included in results. */
4362 struct symtabs_and_lines
4363 expand_line_sal (struct symtab_and_line sal
)
4365 struct symtabs_and_lines ret
, this_line
;
4367 struct objfile
*objfile
;
4368 struct partial_symtab
*psymtab
;
4369 struct symtab
*symtab
;
4372 struct block
**blocks
= NULL
;
4378 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4380 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4387 struct linetable_entry
*best_item
= 0;
4388 struct symtab
*best_symtab
= 0;
4393 /* We meed to find all symtabs for a file which name
4394 is described by sal. We cannot just directly
4395 iterate over symtabs, since a symtab might not be
4396 yet created. We also cannot iterate over psymtabs,
4397 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4398 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4399 corresponding to an included file. Therefore, we do
4400 first pass over psymtabs, reading in those with
4401 the right name. Then, we iterate over symtabs, knowing
4402 that all symtabs we're interested in are loaded. */
4404 ALL_PSYMTABS (objfile
, psymtab
)
4406 if (strcmp (sal
.symtab
->filename
,
4407 psymtab
->filename
) == 0)
4408 PSYMTAB_TO_SYMTAB (psymtab
);
4412 /* For each symtab, we add all pcs to ret.sals. I'm actually
4413 not sure what to do if we have exact match in one symtab,
4414 and non-exact match on another symtab.
4416 ALL_SYMTABS (objfile
, symtab
)
4418 if (strcmp (sal
.symtab
->filename
,
4419 symtab
->filename
) == 0)
4421 struct linetable
*l
;
4423 l
= LINETABLE (symtab
);
4428 for (j
= 0; j
< len
; j
++)
4430 struct linetable_entry
*item
= &(l
->item
[j
]);
4432 if (item
->line
== lineno
)
4435 append_expanded_sal (&ret
, symtab
, lineno
, item
->pc
);
4437 else if (!exact
&& item
->line
> lineno
4438 && (best_item
== NULL
|| item
->line
< best_item
->line
))
4442 best_symtab
= symtab
;
4447 if (!exact
&& best_item
)
4448 append_expanded_sal (&ret
, best_symtab
, lineno
, best_item
->pc
);
4451 /* For optimized code, compiler can scatter one source line accross
4452 disjoint ranges of PC values, even when no duplicate functions
4453 or inline functions are involved. For example, 'for (;;)' inside
4454 non-template non-inline non-ctor-or-dtor function can result
4455 in two PC ranges. In this case, we don't want to set breakpoint
4456 on first PC of each range. To filter such cases, we use containing
4457 blocks -- for each PC found above we see if there are other PCs
4458 that are in the same block. If yes, the other PCs are filtered out. */
4460 filter
= alloca (ret
.nelts
* sizeof (int));
4461 blocks
= alloca (ret
.nelts
* sizeof (struct block
*));
4462 for (i
= 0; i
< ret
.nelts
; ++i
)
4465 blocks
[i
] = block_for_pc (ret
.sals
[i
].pc
);
4468 for (i
= 0; i
< ret
.nelts
; ++i
)
4469 if (blocks
[i
] != NULL
)
4470 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4471 if (blocks
[j
] == blocks
[i
])
4479 struct symtab_and_line
*final
=
4480 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4482 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4484 final
[j
++] = ret
.sals
[i
];
4486 ret
.nelts
-= deleted
;
4496 _initialize_symtab (void)
4498 add_info ("variables", variables_info
, _("\
4499 All global and static variable names, or those matching REGEXP."));
4501 add_com ("whereis", class_info
, variables_info
, _("\
4502 All global and static variable names, or those matching REGEXP."));
4504 add_info ("functions", functions_info
,
4505 _("All function names, or those matching REGEXP."));
4508 /* FIXME: This command has at least the following problems:
4509 1. It prints builtin types (in a very strange and confusing fashion).
4510 2. It doesn't print right, e.g. with
4511 typedef struct foo *FOO
4512 type_print prints "FOO" when we want to make it (in this situation)
4513 print "struct foo *".
4514 I also think "ptype" or "whatis" is more likely to be useful (but if
4515 there is much disagreement "info types" can be fixed). */
4516 add_info ("types", types_info
,
4517 _("All type names, or those matching REGEXP."));
4519 add_info ("sources", sources_info
,
4520 _("Source files in the program."));
4522 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4523 _("Set a breakpoint for all functions matching REGEXP."));
4527 add_com ("lf", class_info
, sources_info
,
4528 _("Source files in the program"));
4529 add_com ("lg", class_info
, variables_info
, _("\
4530 All global and static variable names, or those matching REGEXP."));
4533 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4534 multiple_symbols_modes
, &multiple_symbols_mode
,
4536 Set the debugger behavior when more than one symbol are possible matches\n\
4537 in an expression."), _("\
4538 Show how the debugger handles ambiguities in expressions."), _("\
4539 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4540 NULL
, NULL
, &setlist
, &showlist
);
4542 /* Initialize the one built-in type that isn't language dependent... */
4543 builtin_type_error
= init_type (TYPE_CODE_ERROR
, 0, 0,
4544 "<unknown type>", (struct objfile
*) NULL
);
4546 observer_attach_executable_changed (symtab_observer_executable_changed
);