1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "call-cmds.h"
33 #include "gdb_regex.h"
34 #include "expression.h"
40 #include "filenames.h" /* for FILENAME_CMP */
41 #include "objc-lang.h"
48 #include "gdb_obstack.h"
50 #include "dictionary.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
59 #include "gdb_assert.h"
62 /* Prototypes for local functions */
64 static void completion_list_add_name (char *, char *, int, char *, char *);
66 static void rbreak_command (char *, int);
68 static void types_info (char *, int);
70 static void functions_info (char *, int);
72 static void variables_info (char *, int);
74 static void sources_info (char *, int);
76 static void output_source_filename (const char *, int *);
78 static int find_line_common (struct linetable
*, int, int *);
80 /* This one is used by linespec.c */
82 char *operator_chars (char *p
, char **end
);
84 static struct symbol
*lookup_symbol_aux (const char *name
,
85 const char *linkage_name
,
86 const struct block
*block
,
87 const domain_enum domain
,
88 enum language language
,
89 int *is_a_field_of_this
);
92 struct symbol
*lookup_symbol_aux_local (const char *name
,
93 const char *linkage_name
,
94 const struct block
*block
,
95 const domain_enum domain
);
98 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
100 const char *linkage_name
,
101 const domain_enum domain
);
104 struct symbol
*lookup_symbol_aux_psymtabs (int block_index
,
106 const char *linkage_name
,
107 const domain_enum domain
);
109 static int file_matches (char *, char **, int);
111 static void print_symbol_info (domain_enum
,
112 struct symtab
*, struct symbol
*, int, char *);
114 static void print_msymbol_info (struct minimal_symbol
*);
116 static void symtab_symbol_info (char *, domain_enum
, int);
118 void _initialize_symtab (void);
122 /* Allow the user to configure the debugger behavior with respect
123 to multiple-choice menus when more than one symbol matches during
126 const char multiple_symbols_ask
[] = "ask";
127 const char multiple_symbols_all
[] = "all";
128 const char multiple_symbols_cancel
[] = "cancel";
129 static const char *multiple_symbols_modes
[] =
131 multiple_symbols_ask
,
132 multiple_symbols_all
,
133 multiple_symbols_cancel
,
136 static const char *multiple_symbols_mode
= multiple_symbols_all
;
138 /* Read-only accessor to AUTO_SELECT_MODE. */
141 multiple_symbols_select_mode (void)
143 return multiple_symbols_mode
;
146 /* The single non-language-specific builtin type */
147 struct type
*builtin_type_error
;
149 /* Block in which the most recently searched-for symbol was found.
150 Might be better to make this a parameter to lookup_symbol and
153 const struct block
*block_found
;
155 /* Check for a symtab of a specific name; first in symtabs, then in
156 psymtabs. *If* there is no '/' in the name, a match after a '/'
157 in the symtab filename will also work. */
160 lookup_symtab (const char *name
)
163 struct partial_symtab
*ps
;
164 struct objfile
*objfile
;
165 char *real_path
= NULL
;
166 char *full_path
= NULL
;
168 /* Here we are interested in canonicalizing an absolute path, not
169 absolutizing a relative path. */
170 if (IS_ABSOLUTE_PATH (name
))
172 full_path
= xfullpath (name
);
173 make_cleanup (xfree
, full_path
);
174 real_path
= gdb_realpath (name
);
175 make_cleanup (xfree
, real_path
);
180 /* First, search for an exact match */
182 ALL_SYMTABS (objfile
, s
)
184 if (FILENAME_CMP (name
, s
->filename
) == 0)
189 /* If the user gave us an absolute path, try to find the file in
190 this symtab and use its absolute path. */
192 if (full_path
!= NULL
)
194 const char *fp
= symtab_to_fullname (s
);
195 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
201 if (real_path
!= NULL
)
203 char *fullname
= symtab_to_fullname (s
);
204 if (fullname
!= NULL
)
206 char *rp
= gdb_realpath (fullname
);
207 make_cleanup (xfree
, rp
);
208 if (FILENAME_CMP (real_path
, rp
) == 0)
216 /* Now, search for a matching tail (only if name doesn't have any dirs) */
218 if (lbasename (name
) == name
)
219 ALL_SYMTABS (objfile
, s
)
221 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
225 /* Same search rules as above apply here, but now we look thru the
228 ps
= lookup_partial_symtab (name
);
233 error (_("Internal: readin %s pst for `%s' found when no symtab found."),
236 s
= PSYMTAB_TO_SYMTAB (ps
);
241 /* At this point, we have located the psymtab for this file, but
242 the conversion to a symtab has failed. This usually happens
243 when we are looking up an include file. In this case,
244 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
245 been created. So, we need to run through the symtabs again in
246 order to find the file.
247 XXX - This is a crock, and should be fixed inside of the the
248 symbol parsing routines. */
252 /* Lookup the partial symbol table of a source file named NAME.
253 *If* there is no '/' in the name, a match after a '/'
254 in the psymtab filename will also work. */
256 struct partial_symtab
*
257 lookup_partial_symtab (const char *name
)
259 struct partial_symtab
*pst
;
260 struct objfile
*objfile
;
261 char *full_path
= NULL
;
262 char *real_path
= NULL
;
264 /* Here we are interested in canonicalizing an absolute path, not
265 absolutizing a relative path. */
266 if (IS_ABSOLUTE_PATH (name
))
268 full_path
= xfullpath (name
);
269 make_cleanup (xfree
, full_path
);
270 real_path
= gdb_realpath (name
);
271 make_cleanup (xfree
, real_path
);
274 ALL_PSYMTABS (objfile
, pst
)
276 if (FILENAME_CMP (name
, pst
->filename
) == 0)
281 /* If the user gave us an absolute path, try to find the file in
282 this symtab and use its absolute path. */
283 if (full_path
!= NULL
)
285 psymtab_to_fullname (pst
);
286 if (pst
->fullname
!= NULL
287 && FILENAME_CMP (full_path
, pst
->fullname
) == 0)
293 if (real_path
!= NULL
)
296 psymtab_to_fullname (pst
);
297 if (pst
->fullname
!= NULL
)
299 rp
= gdb_realpath (pst
->fullname
);
300 make_cleanup (xfree
, rp
);
302 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
309 /* Now, search for a matching tail (only if name doesn't have any dirs) */
311 if (lbasename (name
) == name
)
312 ALL_PSYMTABS (objfile
, pst
)
314 if (FILENAME_CMP (lbasename (pst
->filename
), name
) == 0)
321 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
322 full method name, which consist of the class name (from T), the unadorned
323 method name from METHOD_ID, and the signature for the specific overload,
324 specified by SIGNATURE_ID. Note that this function is g++ specific. */
327 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
329 int mangled_name_len
;
331 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
332 struct fn_field
*method
= &f
[signature_id
];
333 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
334 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
335 char *newname
= type_name_no_tag (type
);
337 /* Does the form of physname indicate that it is the full mangled name
338 of a constructor (not just the args)? */
339 int is_full_physname_constructor
;
342 int is_destructor
= is_destructor_name (physname
);
343 /* Need a new type prefix. */
344 char *const_prefix
= method
->is_const
? "C" : "";
345 char *volatile_prefix
= method
->is_volatile
? "V" : "";
347 int len
= (newname
== NULL
? 0 : strlen (newname
));
349 /* Nothing to do if physname already contains a fully mangled v3 abi name
350 or an operator name. */
351 if ((physname
[0] == '_' && physname
[1] == 'Z')
352 || is_operator_name (field_name
))
353 return xstrdup (physname
);
355 is_full_physname_constructor
= is_constructor_name (physname
);
358 is_full_physname_constructor
|| (newname
&& strcmp (field_name
, newname
) == 0);
361 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
363 if (is_destructor
|| is_full_physname_constructor
)
365 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
366 strcpy (mangled_name
, physname
);
372 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
374 else if (physname
[0] == 't' || physname
[0] == 'Q')
376 /* The physname for template and qualified methods already includes
378 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
384 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
386 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
387 + strlen (buf
) + len
+ strlen (physname
) + 1);
390 mangled_name
= (char *) xmalloc (mangled_name_len
);
392 mangled_name
[0] = '\0';
394 strcpy (mangled_name
, field_name
);
396 strcat (mangled_name
, buf
);
397 /* If the class doesn't have a name, i.e. newname NULL, then we just
398 mangle it using 0 for the length of the class. Thus it gets mangled
399 as something starting with `::' rather than `classname::'. */
401 strcat (mangled_name
, newname
);
403 strcat (mangled_name
, physname
);
404 return (mangled_name
);
408 /* Initialize the language dependent portion of a symbol
409 depending upon the language for the symbol. */
411 symbol_init_language_specific (struct general_symbol_info
*gsymbol
,
412 enum language language
)
414 gsymbol
->language
= language
;
415 if (gsymbol
->language
== language_cplus
416 || gsymbol
->language
== language_java
417 || gsymbol
->language
== language_objc
)
419 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
423 memset (&gsymbol
->language_specific
, 0,
424 sizeof (gsymbol
->language_specific
));
428 /* Functions to initialize a symbol's mangled name. */
430 /* Create the hash table used for demangled names. Each hash entry is
431 a pair of strings; one for the mangled name and one for the demangled
432 name. The entry is hashed via just the mangled name. */
435 create_demangled_names_hash (struct objfile
*objfile
)
437 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
438 The hash table code will round this up to the next prime number.
439 Choosing a much larger table size wastes memory, and saves only about
440 1% in symbol reading. */
442 objfile
->demangled_names_hash
= htab_create_alloc
443 (256, htab_hash_string
, (int (*) (const void *, const void *)) streq
,
444 NULL
, xcalloc
, xfree
);
447 /* Try to determine the demangled name for a symbol, based on the
448 language of that symbol. If the language is set to language_auto,
449 it will attempt to find any demangling algorithm that works and
450 then set the language appropriately. The returned name is allocated
451 by the demangler and should be xfree'd. */
454 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
457 char *demangled
= NULL
;
459 if (gsymbol
->language
== language_unknown
)
460 gsymbol
->language
= language_auto
;
462 if (gsymbol
->language
== language_objc
463 || gsymbol
->language
== language_auto
)
466 objc_demangle (mangled
, 0);
467 if (demangled
!= NULL
)
469 gsymbol
->language
= language_objc
;
473 if (gsymbol
->language
== language_cplus
474 || gsymbol
->language
== language_auto
)
477 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
478 if (demangled
!= NULL
)
480 gsymbol
->language
= language_cplus
;
484 if (gsymbol
->language
== language_java
)
487 cplus_demangle (mangled
,
488 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
489 if (demangled
!= NULL
)
491 gsymbol
->language
= language_java
;
498 /* Set both the mangled and demangled (if any) names for GSYMBOL based
499 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
500 is used, and the memory comes from that objfile's objfile_obstack.
501 LINKAGE_NAME is copied, so the pointer can be discarded after
502 calling this function. */
504 /* We have to be careful when dealing with Java names: when we run
505 into a Java minimal symbol, we don't know it's a Java symbol, so it
506 gets demangled as a C++ name. This is unfortunate, but there's not
507 much we can do about it: but when demangling partial symbols and
508 regular symbols, we'd better not reuse the wrong demangled name.
509 (See PR gdb/1039.) We solve this by putting a distinctive prefix
510 on Java names when storing them in the hash table. */
512 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
513 don't mind the Java prefix so much: different languages have
514 different demangling requirements, so it's only natural that we
515 need to keep language data around in our demangling cache. But
516 it's not good that the minimal symbol has the wrong demangled name.
517 Unfortunately, I can't think of any easy solution to that
520 #define JAVA_PREFIX "##JAVA$$"
521 #define JAVA_PREFIX_LEN 8
524 symbol_set_names (struct general_symbol_info
*gsymbol
,
525 const char *linkage_name
, int len
, struct objfile
*objfile
)
528 /* A 0-terminated copy of the linkage name. */
529 const char *linkage_name_copy
;
530 /* A copy of the linkage name that might have a special Java prefix
531 added to it, for use when looking names up in the hash table. */
532 const char *lookup_name
;
533 /* The length of lookup_name. */
536 if (objfile
->demangled_names_hash
== NULL
)
537 create_demangled_names_hash (objfile
);
539 if (gsymbol
->language
== language_ada
)
541 /* In Ada, we do the symbol lookups using the mangled name, so
542 we can save some space by not storing the demangled name.
544 As a side note, we have also observed some overlap between
545 the C++ mangling and Ada mangling, similarly to what has
546 been observed with Java. Because we don't store the demangled
547 name with the symbol, we don't need to use the same trick
549 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
550 memcpy (gsymbol
->name
, linkage_name
, len
);
551 gsymbol
->name
[len
] = '\0';
552 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
557 /* The stabs reader generally provides names that are not
558 NUL-terminated; most of the other readers don't do this, so we
559 can just use the given copy, unless we're in the Java case. */
560 if (gsymbol
->language
== language_java
)
563 lookup_len
= len
+ JAVA_PREFIX_LEN
;
565 alloc_name
= alloca (lookup_len
+ 1);
566 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
567 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
568 alloc_name
[lookup_len
] = '\0';
570 lookup_name
= alloc_name
;
571 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
573 else if (linkage_name
[len
] != '\0')
578 alloc_name
= alloca (lookup_len
+ 1);
579 memcpy (alloc_name
, linkage_name
, len
);
580 alloc_name
[lookup_len
] = '\0';
582 lookup_name
= alloc_name
;
583 linkage_name_copy
= alloc_name
;
588 lookup_name
= linkage_name
;
589 linkage_name_copy
= linkage_name
;
592 slot
= (char **) htab_find_slot (objfile
->demangled_names_hash
,
593 lookup_name
, INSERT
);
595 /* If this name is not in the hash table, add it. */
598 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
600 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
602 /* If there is a demangled name, place it right after the mangled name.
603 Otherwise, just place a second zero byte after the end of the mangled
605 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
606 lookup_len
+ demangled_len
+ 2);
607 memcpy (*slot
, lookup_name
, lookup_len
+ 1);
608 if (demangled_name
!= NULL
)
610 memcpy (*slot
+ lookup_len
+ 1, demangled_name
, demangled_len
+ 1);
611 xfree (demangled_name
);
614 (*slot
)[lookup_len
+ 1] = '\0';
617 gsymbol
->name
= *slot
+ lookup_len
- len
;
618 if ((*slot
)[lookup_len
+ 1] != '\0')
619 gsymbol
->language_specific
.cplus_specific
.demangled_name
620 = &(*slot
)[lookup_len
+ 1];
622 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
625 /* Return the source code name of a symbol. In languages where
626 demangling is necessary, this is the demangled name. */
629 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
631 switch (gsymbol
->language
)
636 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
637 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
640 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
641 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
643 return ada_decode_symbol (gsymbol
);
648 return gsymbol
->name
;
651 /* Return the demangled name for a symbol based on the language for
652 that symbol. If no demangled name exists, return NULL. */
654 symbol_demangled_name (struct general_symbol_info
*gsymbol
)
656 switch (gsymbol
->language
)
661 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
662 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
665 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
666 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
668 return ada_decode_symbol (gsymbol
);
676 /* Return the search name of a symbol---generally the demangled or
677 linkage name of the symbol, depending on how it will be searched for.
678 If there is no distinct demangled name, then returns the same value
679 (same pointer) as SYMBOL_LINKAGE_NAME. */
681 symbol_search_name (const struct general_symbol_info
*gsymbol
)
683 if (gsymbol
->language
== language_ada
)
684 return gsymbol
->name
;
686 return symbol_natural_name (gsymbol
);
689 /* Initialize the structure fields to zero values. */
691 init_sal (struct symtab_and_line
*sal
)
698 sal
->explicit_pc
= 0;
699 sal
->explicit_line
= 0;
703 /* Return 1 if the two sections are the same, or if they could
704 plausibly be copies of each other, one in an original object
705 file and another in a separated debug file. */
708 matching_bfd_sections (asection
*first
, asection
*second
)
712 /* If they're the same section, then they match. */
716 /* If either is NULL, give up. */
717 if (first
== NULL
|| second
== NULL
)
720 /* This doesn't apply to absolute symbols. */
721 if (first
->owner
== NULL
|| second
->owner
== NULL
)
724 /* If they're in the same object file, they must be different sections. */
725 if (first
->owner
== second
->owner
)
728 /* Check whether the two sections are potentially corresponding. They must
729 have the same size, address, and name. We can't compare section indexes,
730 which would be more reliable, because some sections may have been
732 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
735 /* In-memory addresses may start at a different offset, relativize them. */
736 if (bfd_get_section_vma (first
->owner
, first
)
737 - bfd_get_start_address (first
->owner
)
738 != bfd_get_section_vma (second
->owner
, second
)
739 - bfd_get_start_address (second
->owner
))
742 if (bfd_get_section_name (first
->owner
, first
) == NULL
743 || bfd_get_section_name (second
->owner
, second
) == NULL
744 || strcmp (bfd_get_section_name (first
->owner
, first
),
745 bfd_get_section_name (second
->owner
, second
)) != 0)
748 /* Otherwise check that they are in corresponding objfiles. */
751 if (obj
->obfd
== first
->owner
)
753 gdb_assert (obj
!= NULL
);
755 if (obj
->separate_debug_objfile
!= NULL
756 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
758 if (obj
->separate_debug_objfile_backlink
!= NULL
759 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
765 /* Find which partial symtab contains PC and SECTION starting at psymtab PST.
766 We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */
768 struct partial_symtab
*
769 find_pc_sect_psymtab_closer (CORE_ADDR pc
, asection
*section
,
770 struct partial_symtab
*pst
,
771 struct minimal_symbol
*msymbol
)
773 struct objfile
*objfile
= pst
->objfile
;
774 struct partial_symtab
*tpst
;
775 struct partial_symtab
*best_pst
= pst
;
776 CORE_ADDR best_addr
= pst
->textlow
;
778 /* An objfile that has its functions reordered might have
779 many partial symbol tables containing the PC, but
780 we want the partial symbol table that contains the
781 function containing the PC. */
782 if (!(objfile
->flags
& OBJF_REORDERED
) &&
783 section
== 0) /* can't validate section this way */
789 /* The code range of partial symtabs sometimes overlap, so, in
790 the loop below, we need to check all partial symtabs and
791 find the one that fits better for the given PC address. We
792 select the partial symtab that contains a symbol whose
793 address is closest to the PC address. By closest we mean
794 that find_pc_sect_symbol returns the symbol with address
795 that is closest and still less than the given PC. */
796 for (tpst
= pst
; tpst
!= NULL
; tpst
= tpst
->next
)
798 if (pc
>= tpst
->textlow
&& pc
< tpst
->texthigh
)
800 struct partial_symbol
*p
;
803 /* NOTE: This assumes that every psymbol has a
804 corresponding msymbol, which is not necessarily
805 true; the debug info might be much richer than the
806 object's symbol table. */
807 p
= find_pc_sect_psymbol (tpst
, pc
, section
);
809 && SYMBOL_VALUE_ADDRESS (p
)
810 == SYMBOL_VALUE_ADDRESS (msymbol
))
813 /* Also accept the textlow value of a psymtab as a
814 "symbol", to provide some support for partial
815 symbol tables with line information but no debug
816 symbols (e.g. those produced by an assembler). */
818 this_addr
= SYMBOL_VALUE_ADDRESS (p
);
820 this_addr
= tpst
->textlow
;
822 /* Check whether it is closer than our current
823 BEST_ADDR. Since this symbol address is
824 necessarily lower or equal to PC, the symbol closer
825 to PC is the symbol which address is the highest.
826 This way we return the psymtab which contains such
827 best match symbol. This can help in cases where the
828 symbol information/debuginfo is not complete, like
829 for instance on IRIX6 with gcc, where no debug info
830 is emitted for statics. (See also the nodebug.exp
832 if (this_addr
> best_addr
)
834 best_addr
= this_addr
;
842 /* Find which partial symtab contains PC and SECTION. Return 0 if
843 none. We return the psymtab that contains a symbol whose address
844 exactly matches PC, or, if we cannot find an exact match, the
845 psymtab that contains a symbol whose address is closest to PC. */
846 struct partial_symtab
*
847 find_pc_sect_psymtab (CORE_ADDR pc
, asection
*section
)
849 struct objfile
*objfile
;
850 struct minimal_symbol
*msymbol
;
852 /* If we know that this is not a text address, return failure. This is
853 necessary because we loop based on texthigh and textlow, which do
854 not include the data ranges. */
855 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
857 && (msymbol
->type
== mst_data
858 || msymbol
->type
== mst_bss
859 || msymbol
->type
== mst_abs
860 || msymbol
->type
== mst_file_data
861 || msymbol
->type
== mst_file_bss
))
864 /* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
865 than the later used TEXTLOW/TEXTHIGH one. */
867 ALL_OBJFILES (objfile
)
868 if (objfile
->psymtabs_addrmap
!= NULL
)
870 struct partial_symtab
*pst
;
872 pst
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
875 /* FIXME: addrmaps currently do not handle overlayed sections,
876 so fall back to the non-addrmap case if we're debugging
877 overlays and the addrmap returned the wrong section. */
878 if (overlay_debugging
&& msymbol
&& section
)
880 struct partial_symbol
*p
;
881 /* NOTE: This assumes that every psymbol has a
882 corresponding msymbol, which is not necessarily
883 true; the debug info might be much richer than the
884 object's symbol table. */
885 p
= find_pc_sect_psymbol (pst
, pc
, section
);
887 || SYMBOL_VALUE_ADDRESS (p
)
888 != SYMBOL_VALUE_ADDRESS (msymbol
))
892 /* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as
893 PSYMTABS_ADDRMAP we used has already the best 1-byte
894 granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into
895 a worse chosen section due to the TEXTLOW/TEXTHIGH ranges
902 /* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
903 which still have no corresponding full SYMTABs read. But it is not
904 present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB
907 ALL_OBJFILES (objfile
)
909 struct partial_symtab
*pst
;
911 /* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of
912 its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying
913 debug info type in single OBJFILE. */
915 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
916 if (pc
>= pst
->textlow
&& pc
< pst
->texthigh
)
918 struct partial_symtab
*best_pst
;
920 best_pst
= find_pc_sect_psymtab_closer (pc
, section
, pst
,
922 if (best_pst
!= NULL
)
930 /* Find which partial symtab contains PC. Return 0 if none.
931 Backward compatibility, no section */
933 struct partial_symtab
*
934 find_pc_psymtab (CORE_ADDR pc
)
936 return find_pc_sect_psymtab (pc
, find_pc_mapped_section (pc
));
939 /* Find which partial symbol within a psymtab matches PC and SECTION.
940 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
942 struct partial_symbol
*
943 find_pc_sect_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
,
946 struct partial_symbol
*best
= NULL
, *p
, **pp
;
950 psymtab
= find_pc_sect_psymtab (pc
, section
);
954 /* Cope with programs that start at address 0 */
955 best_pc
= (psymtab
->textlow
!= 0) ? psymtab
->textlow
- 1 : 0;
957 /* Search the global symbols as well as the static symbols, so that
958 find_pc_partial_function doesn't use a minimal symbol and thus
959 cache a bad endaddr. */
960 for (pp
= psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
;
961 (pp
- (psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
)
962 < psymtab
->n_global_syms
);
966 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
967 && SYMBOL_CLASS (p
) == LOC_BLOCK
968 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
969 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
970 || (psymtab
->textlow
== 0
971 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
973 if (section
) /* match on a specific section */
975 fixup_psymbol_section (p
, psymtab
->objfile
);
976 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p
), section
))
979 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
984 for (pp
= psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
;
985 (pp
- (psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
)
986 < psymtab
->n_static_syms
);
990 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
991 && SYMBOL_CLASS (p
) == LOC_BLOCK
992 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
993 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
994 || (psymtab
->textlow
== 0
995 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
997 if (section
) /* match on a specific section */
999 fixup_psymbol_section (p
, psymtab
->objfile
);
1000 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p
), section
))
1003 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
1011 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
1012 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
1014 struct partial_symbol
*
1015 find_pc_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
)
1017 return find_pc_sect_psymbol (psymtab
, pc
, find_pc_mapped_section (pc
));
1020 /* Debug symbols usually don't have section information. We need to dig that
1021 out of the minimal symbols and stash that in the debug symbol. */
1024 fixup_section (struct general_symbol_info
*ginfo
,
1025 CORE_ADDR addr
, struct objfile
*objfile
)
1027 struct minimal_symbol
*msym
;
1029 /* First, check whether a minimal symbol with the same name exists
1030 and points to the same address. The address check is required
1031 e.g. on PowerPC64, where the minimal symbol for a function will
1032 point to the function descriptor, while the debug symbol will
1033 point to the actual function code. */
1034 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1037 ginfo
->bfd_section
= SYMBOL_BFD_SECTION (msym
);
1038 ginfo
->section
= SYMBOL_SECTION (msym
);
1042 /* Static, function-local variables do appear in the linker
1043 (minimal) symbols, but are frequently given names that won't
1044 be found via lookup_minimal_symbol(). E.g., it has been
1045 observed in frv-uclinux (ELF) executables that a static,
1046 function-local variable named "foo" might appear in the
1047 linker symbols as "foo.6" or "foo.3". Thus, there is no
1048 point in attempting to extend the lookup-by-name mechanism to
1049 handle this case due to the fact that there can be multiple
1052 So, instead, search the section table when lookup by name has
1053 failed. The ``addr'' and ``endaddr'' fields may have already
1054 been relocated. If so, the relocation offset (i.e. the
1055 ANOFFSET value) needs to be subtracted from these values when
1056 performing the comparison. We unconditionally subtract it,
1057 because, when no relocation has been performed, the ANOFFSET
1058 value will simply be zero.
1060 The address of the symbol whose section we're fixing up HAS
1061 NOT BEEN adjusted (relocated) yet. It can't have been since
1062 the section isn't yet known and knowing the section is
1063 necessary in order to add the correct relocation value. In
1064 other words, we wouldn't even be in this function (attempting
1065 to compute the section) if it were already known.
1067 Note that it is possible to search the minimal symbols
1068 (subtracting the relocation value if necessary) to find the
1069 matching minimal symbol, but this is overkill and much less
1070 efficient. It is not necessary to find the matching minimal
1071 symbol, only its section.
1073 Note that this technique (of doing a section table search)
1074 can fail when unrelocated section addresses overlap. For
1075 this reason, we still attempt a lookup by name prior to doing
1076 a search of the section table. */
1078 struct obj_section
*s
;
1079 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1081 int idx
= s
->the_bfd_section
->index
;
1082 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1084 if (s
->addr
- offset
<= addr
&& addr
< s
->endaddr
- offset
)
1086 ginfo
->bfd_section
= s
->the_bfd_section
;
1087 ginfo
->section
= idx
;
1095 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1102 if (SYMBOL_BFD_SECTION (sym
))
1105 /* We either have an OBJFILE, or we can get at it from the sym's
1106 symtab. Anything else is a bug. */
1107 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1109 if (objfile
== NULL
)
1110 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1112 /* We should have an objfile by now. */
1113 gdb_assert (objfile
);
1115 switch (SYMBOL_CLASS (sym
))
1120 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1123 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1127 /* Nothing else will be listed in the minsyms -- no use looking
1132 fixup_section (&sym
->ginfo
, addr
, objfile
);
1137 struct partial_symbol
*
1138 fixup_psymbol_section (struct partial_symbol
*psym
, struct objfile
*objfile
)
1145 if (SYMBOL_BFD_SECTION (psym
))
1148 gdb_assert (objfile
);
1150 switch (SYMBOL_CLASS (psym
))
1156 addr
= SYMBOL_VALUE_ADDRESS (psym
);
1159 /* Nothing else will be listed in the minsyms -- no use looking
1164 fixup_section (&psym
->ginfo
, addr
, objfile
);
1169 /* Find the definition for a specified symbol name NAME
1170 in domain DOMAIN, visible from lexical block BLOCK.
1171 Returns the struct symbol pointer, or zero if no symbol is found.
1172 If SYMTAB is non-NULL, store the symbol table in which the
1173 symbol was found there, or NULL if not found.
1174 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1175 NAME is a field of the current implied argument `this'. If so set
1176 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1177 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1178 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1180 /* This function has a bunch of loops in it and it would seem to be
1181 attractive to put in some QUIT's (though I'm not really sure
1182 whether it can run long enough to be really important). But there
1183 are a few calls for which it would appear to be bad news to quit
1184 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1185 that there is C++ code below which can error(), but that probably
1186 doesn't affect these calls since they are looking for a known
1187 variable and thus can probably assume it will never hit the C++
1191 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1192 const domain_enum domain
, enum language lang
,
1193 int *is_a_field_of_this
)
1195 char *demangled_name
= NULL
;
1196 const char *modified_name
= NULL
;
1197 const char *mangled_name
= NULL
;
1198 int needtofreename
= 0;
1199 struct symbol
*returnval
;
1201 modified_name
= name
;
1203 /* If we are using C++ or Java, demangle the name before doing a lookup, so
1204 we can always binary search. */
1205 if (lang
== language_cplus
)
1207 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1210 mangled_name
= name
;
1211 modified_name
= demangled_name
;
1215 else if (lang
== language_java
)
1217 demangled_name
= cplus_demangle (name
,
1218 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1221 mangled_name
= name
;
1222 modified_name
= demangled_name
;
1227 if (case_sensitivity
== case_sensitive_off
)
1232 len
= strlen (name
);
1233 copy
= (char *) alloca (len
+ 1);
1234 for (i
= 0; i
< len
; i
++)
1235 copy
[i
] = tolower (name
[i
]);
1237 modified_name
= copy
;
1240 returnval
= lookup_symbol_aux (modified_name
, mangled_name
, block
,
1241 domain
, lang
, is_a_field_of_this
);
1243 xfree (demangled_name
);
1248 /* Behave like lookup_symbol_in_language, but performed with the
1249 current language. */
1252 lookup_symbol (const char *name
, const struct block
*block
,
1253 domain_enum domain
, int *is_a_field_of_this
)
1255 return lookup_symbol_in_language (name
, block
, domain
,
1256 current_language
->la_language
,
1257 is_a_field_of_this
);
1260 /* Behave like lookup_symbol except that NAME is the natural name
1261 of the symbol that we're looking for and, if LINKAGE_NAME is
1262 non-NULL, ensure that the symbol's linkage name matches as
1265 static struct symbol
*
1266 lookup_symbol_aux (const char *name
, const char *linkage_name
,
1267 const struct block
*block
, const domain_enum domain
,
1268 enum language language
, int *is_a_field_of_this
)
1271 const struct language_defn
*langdef
;
1273 /* Make sure we do something sensible with is_a_field_of_this, since
1274 the callers that set this parameter to some non-null value will
1275 certainly use it later and expect it to be either 0 or 1.
1276 If we don't set it, the contents of is_a_field_of_this are
1278 if (is_a_field_of_this
!= NULL
)
1279 *is_a_field_of_this
= 0;
1281 /* Search specified block and its superiors. Don't search
1282 STATIC_BLOCK or GLOBAL_BLOCK. */
1284 sym
= lookup_symbol_aux_local (name
, linkage_name
, block
, domain
);
1288 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1289 check to see if NAME is a field of `this'. */
1291 langdef
= language_def (language
);
1293 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1296 struct symbol
*sym
= NULL
;
1297 /* 'this' is only defined in the function's block, so find the
1298 enclosing function block. */
1299 for (; block
&& !BLOCK_FUNCTION (block
);
1300 block
= BLOCK_SUPERBLOCK (block
));
1302 if (block
&& !dict_empty (BLOCK_DICT (block
)))
1303 sym
= lookup_block_symbol (block
, langdef
->la_name_of_this
,
1307 struct type
*t
= sym
->type
;
1309 /* I'm not really sure that type of this can ever
1310 be typedefed; just be safe. */
1312 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1313 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1314 t
= TYPE_TARGET_TYPE (t
);
1316 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1317 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1318 error (_("Internal error: `%s' is not an aggregate"),
1319 langdef
->la_name_of_this
);
1321 if (check_field (t
, name
))
1323 *is_a_field_of_this
= 1;
1329 /* Now do whatever is appropriate for LANGUAGE to look
1330 up static and global variables. */
1332 sym
= langdef
->la_lookup_symbol_nonlocal (name
, linkage_name
, block
, domain
);
1336 /* Now search all static file-level symbols. Not strictly correct,
1337 but more useful than an error. Do the symtabs first, then check
1338 the psymtabs. If a psymtab indicates the existence of the
1339 desired name as a file-level static, then do psymtab-to-symtab
1340 conversion on the fly and return the found symbol. */
1342 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1346 sym
= lookup_symbol_aux_psymtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1353 /* Check to see if the symbol is defined in BLOCK or its superiors.
1354 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1356 static struct symbol
*
1357 lookup_symbol_aux_local (const char *name
, const char *linkage_name
,
1358 const struct block
*block
,
1359 const domain_enum domain
)
1362 const struct block
*static_block
= block_static_block (block
);
1364 /* Check if either no block is specified or it's a global block. */
1366 if (static_block
== NULL
)
1369 while (block
!= static_block
)
1371 sym
= lookup_symbol_aux_block (name
, linkage_name
, block
, domain
);
1374 block
= BLOCK_SUPERBLOCK (block
);
1377 /* We've reached the static block without finding a result. */
1382 /* Look up OBJFILE to BLOCK. */
1384 static struct objfile
*
1385 lookup_objfile_from_block (const struct block
*block
)
1387 struct objfile
*obj
;
1393 block
= block_global_block (block
);
1394 /* Go through SYMTABS. */
1395 ALL_SYMTABS (obj
, s
)
1396 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1402 /* Look up a symbol in a block; if found, locate its symtab, fixup the
1403 symbol, and set block_found appropriately. */
1406 lookup_symbol_aux_block (const char *name
, const char *linkage_name
,
1407 const struct block
*block
,
1408 const domain_enum domain
)
1412 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1415 block_found
= block
;
1416 return fixup_symbol_section (sym
, NULL
);
1422 /* Check all global symbols in OBJFILE in symtabs and
1426 lookup_global_symbol_from_objfile (const struct objfile
*objfile
,
1428 const char *linkage_name
,
1429 const domain_enum domain
)
1432 struct blockvector
*bv
;
1433 const struct block
*block
;
1435 struct partial_symtab
*ps
;
1437 /* Go through symtabs. */
1438 ALL_OBJFILE_SYMTABS (objfile
, s
)
1440 bv
= BLOCKVECTOR (s
);
1441 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1442 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1445 block_found
= block
;
1446 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1450 /* Now go through psymtabs. */
1451 ALL_OBJFILE_PSYMTABS (objfile
, ps
)
1454 && lookup_partial_symbol (ps
, name
, linkage_name
,
1457 s
= PSYMTAB_TO_SYMTAB (ps
);
1458 bv
= BLOCKVECTOR (s
);
1459 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1460 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1461 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1465 if (objfile
->separate_debug_objfile
)
1466 return lookup_global_symbol_from_objfile (objfile
->separate_debug_objfile
,
1467 name
, linkage_name
, domain
);
1472 /* Check to see if the symbol is defined in one of the symtabs.
1473 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1474 depending on whether or not we want to search global symbols or
1477 static struct symbol
*
1478 lookup_symbol_aux_symtabs (int block_index
,
1479 const char *name
, const char *linkage_name
,
1480 const domain_enum domain
)
1483 struct objfile
*objfile
;
1484 struct blockvector
*bv
;
1485 const struct block
*block
;
1488 ALL_PRIMARY_SYMTABS (objfile
, s
)
1490 bv
= BLOCKVECTOR (s
);
1491 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1492 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1495 block_found
= block
;
1496 return fixup_symbol_section (sym
, objfile
);
1503 /* Check to see if the symbol is defined in one of the partial
1504 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1505 STATIC_BLOCK, depending on whether or not we want to search global
1506 symbols or static symbols. */
1508 static struct symbol
*
1509 lookup_symbol_aux_psymtabs (int block_index
, const char *name
,
1510 const char *linkage_name
,
1511 const domain_enum domain
)
1514 struct objfile
*objfile
;
1515 struct blockvector
*bv
;
1516 const struct block
*block
;
1517 struct partial_symtab
*ps
;
1519 const int psymtab_index
= (block_index
== GLOBAL_BLOCK
? 1 : 0);
1521 ALL_PSYMTABS (objfile
, ps
)
1524 && lookup_partial_symbol (ps
, name
, linkage_name
,
1525 psymtab_index
, domain
))
1527 s
= PSYMTAB_TO_SYMTAB (ps
);
1528 bv
= BLOCKVECTOR (s
);
1529 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1530 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1533 /* This shouldn't be necessary, but as a last resort try
1534 looking in the statics even though the psymtab claimed
1535 the symbol was global, or vice-versa. It's possible
1536 that the psymtab gets it wrong in some cases. */
1538 /* FIXME: carlton/2002-09-30: Should we really do that?
1539 If that happens, isn't it likely to be a GDB error, in
1540 which case we should fix the GDB error rather than
1541 silently dealing with it here? So I'd vote for
1542 removing the check for the symbol in the other
1544 block
= BLOCKVECTOR_BLOCK (bv
,
1545 block_index
== GLOBAL_BLOCK
?
1546 STATIC_BLOCK
: GLOBAL_BLOCK
);
1547 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1549 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>)."),
1550 block_index
== GLOBAL_BLOCK
? "global" : "static",
1551 name
, ps
->filename
, name
, name
);
1553 return fixup_symbol_section (sym
, objfile
);
1560 /* A default version of lookup_symbol_nonlocal for use by languages
1561 that can't think of anything better to do. This implements the C
1565 basic_lookup_symbol_nonlocal (const char *name
,
1566 const char *linkage_name
,
1567 const struct block
*block
,
1568 const domain_enum domain
)
1572 /* NOTE: carlton/2003-05-19: The comments below were written when
1573 this (or what turned into this) was part of lookup_symbol_aux;
1574 I'm much less worried about these questions now, since these
1575 decisions have turned out well, but I leave these comments here
1578 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1579 not it would be appropriate to search the current global block
1580 here as well. (That's what this code used to do before the
1581 is_a_field_of_this check was moved up.) On the one hand, it's
1582 redundant with the lookup_symbol_aux_symtabs search that happens
1583 next. On the other hand, if decode_line_1 is passed an argument
1584 like filename:var, then the user presumably wants 'var' to be
1585 searched for in filename. On the third hand, there shouldn't be
1586 multiple global variables all of which are named 'var', and it's
1587 not like decode_line_1 has ever restricted its search to only
1588 global variables in a single filename. All in all, only
1589 searching the static block here seems best: it's correct and it's
1592 /* NOTE: carlton/2002-12-05: There's also a possible performance
1593 issue here: if you usually search for global symbols in the
1594 current file, then it would be slightly better to search the
1595 current global block before searching all the symtabs. But there
1596 are other factors that have a much greater effect on performance
1597 than that one, so I don't think we should worry about that for
1600 sym
= lookup_symbol_static (name
, linkage_name
, block
, domain
);
1604 return lookup_symbol_global (name
, linkage_name
, block
, domain
);
1607 /* Lookup a symbol in the static block associated to BLOCK, if there
1608 is one; do nothing if BLOCK is NULL or a global block. */
1611 lookup_symbol_static (const char *name
,
1612 const char *linkage_name
,
1613 const struct block
*block
,
1614 const domain_enum domain
)
1616 const struct block
*static_block
= block_static_block (block
);
1618 if (static_block
!= NULL
)
1619 return lookup_symbol_aux_block (name
, linkage_name
, static_block
, domain
);
1624 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1628 lookup_symbol_global (const char *name
,
1629 const char *linkage_name
,
1630 const struct block
*block
,
1631 const domain_enum domain
)
1633 struct symbol
*sym
= NULL
;
1634 struct objfile
*objfile
= NULL
;
1636 /* Call library-specific lookup procedure. */
1637 objfile
= lookup_objfile_from_block (block
);
1638 if (objfile
!= NULL
)
1639 sym
= solib_global_lookup (objfile
, name
, linkage_name
, domain
);
1643 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1647 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1651 symbol_matches_domain (enum language symbol_language
,
1652 domain_enum symbol_domain
,
1655 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1656 A Java class declaration also defines a typedef for the class.
1657 Similarly, any Ada type declaration implicitly defines a typedef. */
1658 if (symbol_language
== language_cplus
1659 || symbol_language
== language_java
1660 || symbol_language
== language_ada
)
1662 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1663 && symbol_domain
== STRUCT_DOMAIN
)
1666 /* For all other languages, strict match is required. */
1667 return (symbol_domain
== domain
);
1670 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1671 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1672 linkage name matches it. Check the global symbols if GLOBAL, the
1673 static symbols if not */
1675 struct partial_symbol
*
1676 lookup_partial_symbol (struct partial_symtab
*pst
, const char *name
,
1677 const char *linkage_name
, int global
,
1680 struct partial_symbol
*temp
;
1681 struct partial_symbol
**start
, **psym
;
1682 struct partial_symbol
**top
, **real_top
, **bottom
, **center
;
1683 int length
= (global
? pst
->n_global_syms
: pst
->n_static_syms
);
1684 int do_linear_search
= 1;
1691 pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
:
1692 pst
->objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1694 if (global
) /* This means we can use a binary search. */
1696 do_linear_search
= 0;
1698 /* Binary search. This search is guaranteed to end with center
1699 pointing at the earliest partial symbol whose name might be
1700 correct. At that point *all* partial symbols with an
1701 appropriate name will be checked against the correct
1705 top
= start
+ length
- 1;
1707 while (top
> bottom
)
1709 center
= bottom
+ (top
- bottom
) / 2;
1710 if (!(center
< top
))
1711 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1712 if (!do_linear_search
1713 && (SYMBOL_LANGUAGE (*center
) == language_java
))
1715 do_linear_search
= 1;
1717 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center
), name
) >= 0)
1723 bottom
= center
+ 1;
1726 if (!(top
== bottom
))
1727 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1729 while (top
<= real_top
1730 && (linkage_name
!= NULL
1731 ? strcmp (SYMBOL_LINKAGE_NAME (*top
), linkage_name
) == 0
1732 : SYMBOL_MATCHES_SEARCH_NAME (*top
,name
)))
1734 if (symbol_matches_domain (SYMBOL_LANGUAGE (*top
),
1735 SYMBOL_DOMAIN (*top
), domain
))
1741 /* Can't use a binary search or else we found during the binary search that
1742 we should also do a linear search. */
1744 if (do_linear_search
)
1746 for (psym
= start
; psym
< start
+ length
; psym
++)
1748 if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym
),
1749 SYMBOL_DOMAIN (*psym
), domain
))
1751 if (linkage_name
!= NULL
1752 ? strcmp (SYMBOL_LINKAGE_NAME (*psym
), linkage_name
) == 0
1753 : SYMBOL_MATCHES_SEARCH_NAME (*psym
, name
))
1764 /* Look up a type named NAME in the struct_domain. The type returned
1765 must not be opaque -- i.e., must have at least one field
1769 lookup_transparent_type (const char *name
)
1771 return current_language
->la_lookup_transparent_type (name
);
1774 /* The standard implementation of lookup_transparent_type. This code
1775 was modeled on lookup_symbol -- the parts not relevant to looking
1776 up types were just left out. In particular it's assumed here that
1777 types are available in struct_domain and only at file-static or
1781 basic_lookup_transparent_type (const char *name
)
1784 struct symtab
*s
= NULL
;
1785 struct partial_symtab
*ps
;
1786 struct blockvector
*bv
;
1787 struct objfile
*objfile
;
1788 struct block
*block
;
1790 /* Now search all the global symbols. Do the symtab's first, then
1791 check the psymtab's. If a psymtab indicates the existence
1792 of the desired name as a global, then do psymtab-to-symtab
1793 conversion on the fly and return the found symbol. */
1795 ALL_PRIMARY_SYMTABS (objfile
, s
)
1797 bv
= BLOCKVECTOR (s
);
1798 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1799 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1800 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1802 return SYMBOL_TYPE (sym
);
1806 ALL_PSYMTABS (objfile
, ps
)
1808 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
,
1811 s
= PSYMTAB_TO_SYMTAB (ps
);
1812 bv
= BLOCKVECTOR (s
);
1813 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1814 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1817 /* This shouldn't be necessary, but as a last resort
1818 * try looking in the statics even though the psymtab
1819 * claimed the symbol was global. It's possible that
1820 * the psymtab gets it wrong in some cases.
1822 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1823 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1825 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1826 %s may be an inlined function, or may be a template function\n\
1827 (if a template, try specifying an instantiation: %s<type>)."),
1828 name
, ps
->filename
, name
, name
);
1830 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1831 return SYMBOL_TYPE (sym
);
1835 /* Now search the static file-level symbols.
1836 Not strictly correct, but more useful than an error.
1837 Do the symtab's first, then
1838 check the psymtab's. If a psymtab indicates the existence
1839 of the desired name as a file-level static, then do psymtab-to-symtab
1840 conversion on the fly and return the found symbol.
1843 ALL_PRIMARY_SYMTABS (objfile
, s
)
1845 bv
= BLOCKVECTOR (s
);
1846 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1847 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1848 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1850 return SYMBOL_TYPE (sym
);
1854 ALL_PSYMTABS (objfile
, ps
)
1856 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
, 0, STRUCT_DOMAIN
))
1858 s
= PSYMTAB_TO_SYMTAB (ps
);
1859 bv
= BLOCKVECTOR (s
);
1860 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1861 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1864 /* This shouldn't be necessary, but as a last resort
1865 * try looking in the globals even though the psymtab
1866 * claimed the symbol was static. It's possible that
1867 * the psymtab gets it wrong in some cases.
1869 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1870 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1872 error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1873 %s may be an inlined function, or may be a template function\n\
1874 (if a template, try specifying an instantiation: %s<type>)."),
1875 name
, ps
->filename
, name
, name
);
1877 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1878 return SYMBOL_TYPE (sym
);
1881 return (struct type
*) 0;
1885 /* Find the psymtab containing main(). */
1886 /* FIXME: What about languages without main() or specially linked
1887 executables that have no main() ? */
1889 struct partial_symtab
*
1890 find_main_psymtab (void)
1892 struct partial_symtab
*pst
;
1893 struct objfile
*objfile
;
1895 ALL_PSYMTABS (objfile
, pst
)
1897 if (lookup_partial_symbol (pst
, main_name (), NULL
, 1, VAR_DOMAIN
))
1905 /* Search BLOCK for symbol NAME in DOMAIN.
1907 Note that if NAME is the demangled form of a C++ symbol, we will fail
1908 to find a match during the binary search of the non-encoded names, but
1909 for now we don't worry about the slight inefficiency of looking for
1910 a match we'll never find, since it will go pretty quick. Once the
1911 binary search terminates, we drop through and do a straight linear
1912 search on the symbols. Each symbol which is marked as being a ObjC/C++
1913 symbol (language_cplus or language_objc set) has both the encoded and
1914 non-encoded names tested for a match.
1916 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1917 particular mangled name.
1921 lookup_block_symbol (const struct block
*block
, const char *name
,
1922 const char *linkage_name
,
1923 const domain_enum domain
)
1925 struct dict_iterator iter
;
1928 if (!BLOCK_FUNCTION (block
))
1930 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1932 sym
= dict_iter_name_next (name
, &iter
))
1934 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1935 SYMBOL_DOMAIN (sym
), domain
)
1936 && (linkage_name
!= NULL
1937 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1944 /* Note that parameter symbols do not always show up last in the
1945 list; this loop makes sure to take anything else other than
1946 parameter symbols first; it only uses parameter symbols as a
1947 last resort. Note that this only takes up extra computation
1950 struct symbol
*sym_found
= NULL
;
1952 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1954 sym
= dict_iter_name_next (name
, &iter
))
1956 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1957 SYMBOL_DOMAIN (sym
), domain
)
1958 && (linkage_name
!= NULL
1959 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1962 if (SYMBOL_CLASS (sym
) != LOC_ARG
&&
1963 SYMBOL_CLASS (sym
) != LOC_LOCAL_ARG
&&
1964 SYMBOL_CLASS (sym
) != LOC_REF_ARG
&&
1965 SYMBOL_CLASS (sym
) != LOC_REGPARM
&&
1966 SYMBOL_CLASS (sym
) != LOC_REGPARM_ADDR
&&
1967 SYMBOL_CLASS (sym
) != LOC_BASEREG_ARG
&&
1968 SYMBOL_CLASS (sym
) != LOC_COMPUTED_ARG
)
1974 return (sym_found
); /* Will be NULL if not found. */
1978 /* Find the symtab associated with PC and SECTION. Look through the
1979 psymtabs and read in another symtab if necessary. */
1982 find_pc_sect_symtab (CORE_ADDR pc
, asection
*section
)
1985 struct blockvector
*bv
;
1986 struct symtab
*s
= NULL
;
1987 struct symtab
*best_s
= NULL
;
1988 struct partial_symtab
*ps
;
1989 struct objfile
*objfile
;
1990 CORE_ADDR distance
= 0;
1991 struct minimal_symbol
*msymbol
;
1993 /* If we know that this is not a text address, return failure. This is
1994 necessary because we loop based on the block's high and low code
1995 addresses, which do not include the data ranges, and because
1996 we call find_pc_sect_psymtab which has a similar restriction based
1997 on the partial_symtab's texthigh and textlow. */
1998 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2000 && (msymbol
->type
== mst_data
2001 || msymbol
->type
== mst_bss
2002 || msymbol
->type
== mst_abs
2003 || msymbol
->type
== mst_file_data
2004 || msymbol
->type
== mst_file_bss
))
2007 /* Search all symtabs for the one whose file contains our address, and which
2008 is the smallest of all the ones containing the address. This is designed
2009 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2010 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2011 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2013 This happens for native ecoff format, where code from included files
2014 gets its own symtab. The symtab for the included file should have
2015 been read in already via the dependency mechanism.
2016 It might be swifter to create several symtabs with the same name
2017 like xcoff does (I'm not sure).
2019 It also happens for objfiles that have their functions reordered.
2020 For these, the symtab we are looking for is not necessarily read in. */
2022 ALL_PRIMARY_SYMTABS (objfile
, s
)
2024 bv
= BLOCKVECTOR (s
);
2025 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2027 if (BLOCK_START (b
) <= pc
2028 && BLOCK_END (b
) > pc
2030 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2032 /* For an objfile that has its functions reordered,
2033 find_pc_psymtab will find the proper partial symbol table
2034 and we simply return its corresponding symtab. */
2035 /* In order to better support objfiles that contain both
2036 stabs and coff debugging info, we continue on if a psymtab
2038 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->psymtabs
)
2040 ps
= find_pc_sect_psymtab (pc
, section
);
2042 return PSYMTAB_TO_SYMTAB (ps
);
2046 struct dict_iterator iter
;
2047 struct symbol
*sym
= NULL
;
2049 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2051 fixup_symbol_section (sym
, objfile
);
2052 if (matching_bfd_sections (SYMBOL_BFD_SECTION (sym
), section
))
2056 continue; /* no symbol in this symtab matches section */
2058 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2067 ps
= find_pc_sect_psymtab (pc
, section
);
2071 /* Might want to error() here (in case symtab is corrupt and
2072 will cause a core dump), but maybe we can successfully
2073 continue, so let's not. */
2075 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n"),
2077 s
= PSYMTAB_TO_SYMTAB (ps
);
2082 /* Find the symtab associated with PC. Look through the psymtabs and
2083 read in another symtab if necessary. Backward compatibility, no section */
2086 find_pc_symtab (CORE_ADDR pc
)
2088 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2092 /* Find the source file and line number for a given PC value and SECTION.
2093 Return a structure containing a symtab pointer, a line number,
2094 and a pc range for the entire source line.
2095 The value's .pc field is NOT the specified pc.
2096 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2097 use the line that ends there. Otherwise, in that case, the line
2098 that begins there is used. */
2100 /* The big complication here is that a line may start in one file, and end just
2101 before the start of another file. This usually occurs when you #include
2102 code in the middle of a subroutine. To properly find the end of a line's PC
2103 range, we must search all symtabs associated with this compilation unit, and
2104 find the one whose first PC is closer than that of the next line in this
2107 /* If it's worth the effort, we could be using a binary search. */
2109 struct symtab_and_line
2110 find_pc_sect_line (CORE_ADDR pc
, struct bfd_section
*section
, int notcurrent
)
2113 struct linetable
*l
;
2116 struct linetable_entry
*item
;
2117 struct symtab_and_line val
;
2118 struct blockvector
*bv
;
2119 struct minimal_symbol
*msymbol
;
2120 struct minimal_symbol
*mfunsym
;
2122 /* Info on best line seen so far, and where it starts, and its file. */
2124 struct linetable_entry
*best
= NULL
;
2125 CORE_ADDR best_end
= 0;
2126 struct symtab
*best_symtab
= 0;
2128 /* Store here the first line number
2129 of a file which contains the line at the smallest pc after PC.
2130 If we don't find a line whose range contains PC,
2131 we will use a line one less than this,
2132 with a range from the start of that file to the first line's pc. */
2133 struct linetable_entry
*alt
= NULL
;
2134 struct symtab
*alt_symtab
= 0;
2136 /* Info on best line seen in this file. */
2138 struct linetable_entry
*prev
;
2140 /* If this pc is not from the current frame,
2141 it is the address of the end of a call instruction.
2142 Quite likely that is the start of the following statement.
2143 But what we want is the statement containing the instruction.
2144 Fudge the pc to make sure we get that. */
2146 init_sal (&val
); /* initialize to zeroes */
2148 /* It's tempting to assume that, if we can't find debugging info for
2149 any function enclosing PC, that we shouldn't search for line
2150 number info, either. However, GAS can emit line number info for
2151 assembly files --- very helpful when debugging hand-written
2152 assembly code. In such a case, we'd have no debug info for the
2153 function, but we would have line info. */
2158 /* elz: added this because this function returned the wrong
2159 information if the pc belongs to a stub (import/export)
2160 to call a shlib function. This stub would be anywhere between
2161 two functions in the target, and the line info was erroneously
2162 taken to be the one of the line before the pc.
2164 /* RT: Further explanation:
2166 * We have stubs (trampolines) inserted between procedures.
2168 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2169 * exists in the main image.
2171 * In the minimal symbol table, we have a bunch of symbols
2172 * sorted by start address. The stubs are marked as "trampoline",
2173 * the others appear as text. E.g.:
2175 * Minimal symbol table for main image
2176 * main: code for main (text symbol)
2177 * shr1: stub (trampoline symbol)
2178 * foo: code for foo (text symbol)
2180 * Minimal symbol table for "shr1" image:
2182 * shr1: code for shr1 (text symbol)
2185 * So the code below is trying to detect if we are in the stub
2186 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2187 * and if found, do the symbolization from the real-code address
2188 * rather than the stub address.
2190 * Assumptions being made about the minimal symbol table:
2191 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2192 * if we're really in the trampoline. If we're beyond it (say
2193 * we're in "foo" in the above example), it'll have a closer
2194 * symbol (the "foo" text symbol for example) and will not
2195 * return the trampoline.
2196 * 2. lookup_minimal_symbol_text() will find a real text symbol
2197 * corresponding to the trampoline, and whose address will
2198 * be different than the trampoline address. I put in a sanity
2199 * check for the address being the same, to avoid an
2200 * infinite recursion.
2202 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2203 if (msymbol
!= NULL
)
2204 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2206 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2208 if (mfunsym
== NULL
)
2209 /* I eliminated this warning since it is coming out
2210 * in the following situation:
2211 * gdb shmain // test program with shared libraries
2212 * (gdb) break shr1 // function in shared lib
2213 * Warning: In stub for ...
2214 * In the above situation, the shared lib is not loaded yet,
2215 * so of course we can't find the real func/line info,
2216 * but the "break" still works, and the warning is annoying.
2217 * So I commented out the warning. RT */
2218 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2220 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
2221 /* Avoid infinite recursion */
2222 /* See above comment about why warning is commented out */
2223 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2226 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2230 s
= find_pc_sect_symtab (pc
, section
);
2233 /* if no symbol information, return previous pc */
2240 bv
= BLOCKVECTOR (s
);
2242 /* Look at all the symtabs that share this blockvector.
2243 They all have the same apriori range, that we found was right;
2244 but they have different line tables. */
2246 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2248 /* Find the best line in this symtab. */
2255 /* I think len can be zero if the symtab lacks line numbers
2256 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2257 I'm not sure which, and maybe it depends on the symbol
2263 item
= l
->item
; /* Get first line info */
2265 /* Is this file's first line closer than the first lines of other files?
2266 If so, record this file, and its first line, as best alternate. */
2267 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2273 for (i
= 0; i
< len
; i
++, item
++)
2275 /* Leave prev pointing to the linetable entry for the last line
2276 that started at or before PC. */
2283 /* At this point, prev points at the line whose start addr is <= pc, and
2284 item points at the next line. If we ran off the end of the linetable
2285 (pc >= start of the last line), then prev == item. If pc < start of
2286 the first line, prev will not be set. */
2288 /* Is this file's best line closer than the best in the other files?
2289 If so, record this file, and its best line, as best so far. Don't
2290 save prev if it represents the end of a function (i.e. line number
2291 0) instead of a real line. */
2293 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2298 /* Discard BEST_END if it's before the PC of the current BEST. */
2299 if (best_end
<= best
->pc
)
2303 /* If another line (denoted by ITEM) is in the linetable and its
2304 PC is after BEST's PC, but before the current BEST_END, then
2305 use ITEM's PC as the new best_end. */
2306 if (best
&& i
< len
&& item
->pc
> best
->pc
2307 && (best_end
== 0 || best_end
> item
->pc
))
2308 best_end
= item
->pc
;
2313 /* If we didn't find any line number info, just return zeros.
2314 We used to return alt->line - 1 here, but that could be
2315 anywhere; if we don't have line number info for this PC,
2316 don't make some up. */
2319 else if (best
->line
== 0)
2321 /* If our best fit is in a range of PC's for which no line
2322 number info is available (line number is zero) then we didn't
2323 find any valid line information. */
2328 val
.symtab
= best_symtab
;
2329 val
.line
= best
->line
;
2331 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2336 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2338 val
.section
= section
;
2342 /* Backward compatibility (no section) */
2344 struct symtab_and_line
2345 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2349 section
= find_pc_overlay (pc
);
2350 if (pc_in_unmapped_range (pc
, section
))
2351 pc
= overlay_mapped_address (pc
, section
);
2352 return find_pc_sect_line (pc
, section
, notcurrent
);
2355 /* Find line number LINE in any symtab whose name is the same as
2358 If found, return the symtab that contains the linetable in which it was
2359 found, set *INDEX to the index in the linetable of the best entry
2360 found, and set *EXACT_MATCH nonzero if the value returned is an
2363 If not found, return NULL. */
2366 find_line_symtab (struct symtab
*symtab
, int line
, int *index
, int *exact_match
)
2370 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2374 struct linetable
*best_linetable
;
2375 struct symtab
*best_symtab
;
2377 /* First try looking it up in the given symtab. */
2378 best_linetable
= LINETABLE (symtab
);
2379 best_symtab
= symtab
;
2380 best_index
= find_line_common (best_linetable
, line
, &exact
);
2381 if (best_index
< 0 || !exact
)
2383 /* Didn't find an exact match. So we better keep looking for
2384 another symtab with the same name. In the case of xcoff,
2385 multiple csects for one source file (produced by IBM's FORTRAN
2386 compiler) produce multiple symtabs (this is unavoidable
2387 assuming csects can be at arbitrary places in memory and that
2388 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2390 /* BEST is the smallest linenumber > LINE so far seen,
2391 or 0 if none has been seen so far.
2392 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2395 struct objfile
*objfile
;
2397 struct partial_symtab
*p
;
2399 if (best_index
>= 0)
2400 best
= best_linetable
->item
[best_index
].line
;
2404 ALL_PSYMTABS (objfile
, p
)
2406 if (strcmp (symtab
->filename
, p
->filename
) != 0)
2408 PSYMTAB_TO_SYMTAB (p
);
2411 ALL_SYMTABS (objfile
, s
)
2413 struct linetable
*l
;
2416 if (strcmp (symtab
->filename
, s
->filename
) != 0)
2419 ind
= find_line_common (l
, line
, &exact
);
2429 if (best
== 0 || l
->item
[ind
].line
< best
)
2431 best
= l
->item
[ind
].line
;
2444 *index
= best_index
;
2446 *exact_match
= exact
;
2451 /* Set the PC value for a given source file and line number and return true.
2452 Returns zero for invalid line number (and sets the PC to 0).
2453 The source file is specified with a struct symtab. */
2456 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2458 struct linetable
*l
;
2465 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2468 l
= LINETABLE (symtab
);
2469 *pc
= l
->item
[ind
].pc
;
2476 /* Find the range of pc values in a line.
2477 Store the starting pc of the line into *STARTPTR
2478 and the ending pc (start of next line) into *ENDPTR.
2479 Returns 1 to indicate success.
2480 Returns 0 if could not find the specified line. */
2483 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2486 CORE_ADDR startaddr
;
2487 struct symtab_and_line found_sal
;
2490 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2493 /* This whole function is based on address. For example, if line 10 has
2494 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2495 "info line *0x123" should say the line goes from 0x100 to 0x200
2496 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2497 This also insures that we never give a range like "starts at 0x134
2498 and ends at 0x12c". */
2500 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2501 if (found_sal
.line
!= sal
.line
)
2503 /* The specified line (sal) has zero bytes. */
2504 *startptr
= found_sal
.pc
;
2505 *endptr
= found_sal
.pc
;
2509 *startptr
= found_sal
.pc
;
2510 *endptr
= found_sal
.end
;
2515 /* Given a line table and a line number, return the index into the line
2516 table for the pc of the nearest line whose number is >= the specified one.
2517 Return -1 if none is found. The value is >= 0 if it is an index.
2519 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2522 find_line_common (struct linetable
*l
, int lineno
,
2528 /* BEST is the smallest linenumber > LINENO so far seen,
2529 or 0 if none has been seen so far.
2530 BEST_INDEX identifies the item for it. */
2532 int best_index
= -1;
2543 for (i
= 0; i
< len
; i
++)
2545 struct linetable_entry
*item
= &(l
->item
[i
]);
2547 if (item
->line
== lineno
)
2549 /* Return the first (lowest address) entry which matches. */
2554 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2561 /* If we got here, we didn't get an exact match. */
2566 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2568 struct symtab_and_line sal
;
2569 sal
= find_pc_line (pc
, 0);
2572 return sal
.symtab
!= 0;
2575 /* Given a function start address PC and SECTION, find the first
2576 address after the function prologue. */
2578 find_function_start_pc (struct gdbarch
*gdbarch
,
2579 CORE_ADDR pc
, asection
*section
)
2581 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2582 so that gdbarch_skip_prologue has something unique to work on. */
2583 if (section_is_overlay (section
) && !section_is_mapped (section
))
2584 pc
= overlay_unmapped_address (pc
, section
);
2586 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2587 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2589 /* For overlays, map pc back into its mapped VMA range. */
2590 pc
= overlay_mapped_address (pc
, section
);
2595 /* Given a function symbol SYM, find the symtab and line for the start
2597 If the argument FUNFIRSTLINE is nonzero, we want the first line
2598 of real code inside the function. */
2600 struct symtab_and_line
2601 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2603 struct block
*block
= SYMBOL_BLOCK_VALUE (sym
);
2604 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2605 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2608 struct symtab_and_line sal
;
2610 pc
= BLOCK_START (block
);
2611 fixup_symbol_section (sym
, objfile
);
2614 /* Skip "first line" of function (which is actually its prologue). */
2615 pc
= find_function_start_pc (gdbarch
, pc
, SYMBOL_BFD_SECTION (sym
));
2617 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2619 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2620 line is still part of the same function. */
2622 && BLOCK_START (block
) <= sal
.end
2623 && sal
.end
< BLOCK_END (block
))
2625 /* First pc of next line */
2627 /* Recalculate the line number (might not be N+1). */
2628 sal
= find_pc_sect_line (pc
, SYMBOL_BFD_SECTION (sym
), 0);
2635 /* If P is of the form "operator[ \t]+..." where `...' is
2636 some legitimate operator text, return a pointer to the
2637 beginning of the substring of the operator text.
2638 Otherwise, return "". */
2640 operator_chars (char *p
, char **end
)
2643 if (strncmp (p
, "operator", 8))
2647 /* Don't get faked out by `operator' being part of a longer
2649 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2652 /* Allow some whitespace between `operator' and the operator symbol. */
2653 while (*p
== ' ' || *p
== '\t')
2656 /* Recognize 'operator TYPENAME'. */
2658 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2661 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2670 case '\\': /* regexp quoting */
2673 if (p
[2] == '=') /* 'operator\*=' */
2675 else /* 'operator\*' */
2679 else if (p
[1] == '[')
2682 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2683 else if (p
[2] == '\\' && p
[3] == ']')
2685 *end
= p
+ 4; /* 'operator\[\]' */
2689 error (_("nothing is allowed between '[' and ']'"));
2693 /* Gratuitous qoute: skip it and move on. */
2715 if (p
[0] == '-' && p
[1] == '>')
2717 /* Struct pointer member operator 'operator->'. */
2720 *end
= p
+ 3; /* 'operator->*' */
2723 else if (p
[2] == '\\')
2725 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2730 *end
= p
+ 2; /* 'operator->' */
2734 if (p
[1] == '=' || p
[1] == p
[0])
2745 error (_("`operator ()' must be specified without whitespace in `()'"));
2750 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2755 error (_("`operator []' must be specified without whitespace in `[]'"));
2759 error (_("`operator %s' not supported"), p
);
2768 /* If FILE is not already in the table of files, return zero;
2769 otherwise return non-zero. Optionally add FILE to the table if ADD
2770 is non-zero. If *FIRST is non-zero, forget the old table
2773 filename_seen (const char *file
, int add
, int *first
)
2775 /* Table of files seen so far. */
2776 static const char **tab
= NULL
;
2777 /* Allocated size of tab in elements.
2778 Start with one 256-byte block (when using GNU malloc.c).
2779 24 is the malloc overhead when range checking is in effect. */
2780 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2781 /* Current size of tab in elements. */
2782 static int tab_cur_size
;
2788 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2792 /* Is FILE in tab? */
2793 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2794 if (strcmp (*p
, file
) == 0)
2797 /* No; maybe add it to tab. */
2800 if (tab_cur_size
== tab_alloc_size
)
2802 tab_alloc_size
*= 2;
2803 tab
= (const char **) xrealloc ((char *) tab
,
2804 tab_alloc_size
* sizeof (*tab
));
2806 tab
[tab_cur_size
++] = file
;
2812 /* Slave routine for sources_info. Force line breaks at ,'s.
2813 NAME is the name to print and *FIRST is nonzero if this is the first
2814 name printed. Set *FIRST to zero. */
2816 output_source_filename (const char *name
, int *first
)
2818 /* Since a single source file can result in several partial symbol
2819 tables, we need to avoid printing it more than once. Note: if
2820 some of the psymtabs are read in and some are not, it gets
2821 printed both under "Source files for which symbols have been
2822 read" and "Source files for which symbols will be read in on
2823 demand". I consider this a reasonable way to deal with the
2824 situation. I'm not sure whether this can also happen for
2825 symtabs; it doesn't hurt to check. */
2827 /* Was NAME already seen? */
2828 if (filename_seen (name
, 1, first
))
2830 /* Yes; don't print it again. */
2833 /* No; print it and reset *FIRST. */
2840 printf_filtered (", ");
2844 fputs_filtered (name
, gdb_stdout
);
2848 sources_info (char *ignore
, int from_tty
)
2851 struct partial_symtab
*ps
;
2852 struct objfile
*objfile
;
2855 if (!have_full_symbols () && !have_partial_symbols ())
2857 error (_("No symbol table is loaded. Use the \"file\" command."));
2860 printf_filtered ("Source files for which symbols have been read in:\n\n");
2863 ALL_SYMTABS (objfile
, s
)
2865 const char *fullname
= symtab_to_fullname (s
);
2866 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2868 printf_filtered ("\n\n");
2870 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2873 ALL_PSYMTABS (objfile
, ps
)
2877 const char *fullname
= psymtab_to_fullname (ps
);
2878 output_source_filename (fullname
? fullname
: ps
->filename
, &first
);
2881 printf_filtered ("\n");
2885 file_matches (char *file
, char *files
[], int nfiles
)
2889 if (file
!= NULL
&& nfiles
!= 0)
2891 for (i
= 0; i
< nfiles
; i
++)
2893 if (strcmp (files
[i
], lbasename (file
)) == 0)
2897 else if (nfiles
== 0)
2902 /* Free any memory associated with a search. */
2904 free_search_symbols (struct symbol_search
*symbols
)
2906 struct symbol_search
*p
;
2907 struct symbol_search
*next
;
2909 for (p
= symbols
; p
!= NULL
; p
= next
)
2917 do_free_search_symbols_cleanup (void *symbols
)
2919 free_search_symbols (symbols
);
2923 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2925 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2928 /* Helper function for sort_search_symbols and qsort. Can only
2929 sort symbols, not minimal symbols. */
2931 compare_search_syms (const void *sa
, const void *sb
)
2933 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2934 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2936 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2937 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2940 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2941 prevtail where it is, but update its next pointer to point to
2942 the first of the sorted symbols. */
2943 static struct symbol_search
*
2944 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2946 struct symbol_search
**symbols
, *symp
, *old_next
;
2949 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2951 symp
= prevtail
->next
;
2952 for (i
= 0; i
< nfound
; i
++)
2957 /* Generally NULL. */
2960 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2961 compare_search_syms
);
2964 for (i
= 0; i
< nfound
; i
++)
2966 symp
->next
= symbols
[i
];
2969 symp
->next
= old_next
;
2975 /* Search the symbol table for matches to the regular expression REGEXP,
2976 returning the results in *MATCHES.
2978 Only symbols of KIND are searched:
2979 FUNCTIONS_DOMAIN - search all functions
2980 TYPES_DOMAIN - search all type names
2981 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2982 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2983 and constants (enums)
2985 free_search_symbols should be called when *MATCHES is no longer needed.
2987 The results are sorted locally; each symtab's global and static blocks are
2988 separately alphabetized.
2991 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
2992 struct symbol_search
**matches
)
2995 struct partial_symtab
*ps
;
2996 struct blockvector
*bv
;
2999 struct dict_iterator iter
;
3001 struct partial_symbol
**psym
;
3002 struct objfile
*objfile
;
3003 struct minimal_symbol
*msymbol
;
3006 static enum minimal_symbol_type types
[]
3008 {mst_data
, mst_text
, mst_abs
, mst_unknown
};
3009 static enum minimal_symbol_type types2
[]
3011 {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
3012 static enum minimal_symbol_type types3
[]
3014 {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
3015 static enum minimal_symbol_type types4
[]
3017 {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
3018 enum minimal_symbol_type ourtype
;
3019 enum minimal_symbol_type ourtype2
;
3020 enum minimal_symbol_type ourtype3
;
3021 enum minimal_symbol_type ourtype4
;
3022 struct symbol_search
*sr
;
3023 struct symbol_search
*psr
;
3024 struct symbol_search
*tail
;
3025 struct cleanup
*old_chain
= NULL
;
3027 if (kind
< VARIABLES_DOMAIN
)
3028 error (_("must search on specific domain"));
3030 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3031 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3032 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3033 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3035 sr
= *matches
= NULL
;
3040 /* Make sure spacing is right for C++ operators.
3041 This is just a courtesy to make the matching less sensitive
3042 to how many spaces the user leaves between 'operator'
3043 and <TYPENAME> or <OPERATOR>. */
3045 char *opname
= operator_chars (regexp
, &opend
);
3048 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
3049 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3051 /* There should 1 space between 'operator' and 'TYPENAME'. */
3052 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3057 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3058 if (opname
[-1] == ' ')
3061 /* If wrong number of spaces, fix it. */
3064 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3065 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3070 if (0 != (val
= re_comp (regexp
)))
3071 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3074 /* Search through the partial symtabs *first* for all symbols
3075 matching the regexp. That way we don't have to reproduce all of
3076 the machinery below. */
3078 ALL_PSYMTABS (objfile
, ps
)
3080 struct partial_symbol
**bound
, **gbound
, **sbound
;
3086 gbound
= objfile
->global_psymbols
.list
+ ps
->globals_offset
+ ps
->n_global_syms
;
3087 sbound
= objfile
->static_psymbols
.list
+ ps
->statics_offset
+ ps
->n_static_syms
;
3090 /* Go through all of the symbols stored in a partial
3091 symtab in one loop. */
3092 psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3097 if (bound
== gbound
&& ps
->n_static_syms
!= 0)
3099 psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3110 /* If it would match (logic taken from loop below)
3111 load the file and go on to the next one. We check the
3112 filename here, but that's a bit bogus: we don't know
3113 what file it really comes from until we have full
3114 symtabs. The symbol might be in a header file included by
3115 this psymtab. This only affects Insight. */
3116 if (file_matches (ps
->filename
, files
, nfiles
)
3118 || re_exec (SYMBOL_NATURAL_NAME (*psym
)) != 0)
3119 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (*psym
) != LOC_TYPEDEF
3120 && SYMBOL_CLASS (*psym
) != LOC_BLOCK
)
3121 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
)
3122 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_TYPEDEF
)
3123 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
))))
3125 PSYMTAB_TO_SYMTAB (ps
);
3133 /* Here, we search through the minimal symbol tables for functions
3134 and variables that match, and force their symbols to be read.
3135 This is in particular necessary for demangled variable names,
3136 which are no longer put into the partial symbol tables.
3137 The symbol will then be found during the scan of symtabs below.
3139 For functions, find_pc_symtab should succeed if we have debug info
3140 for the function, for variables we have to call lookup_symbol
3141 to determine if the variable has debug info.
3142 If the lookup fails, set found_misc so that we will rescan to print
3143 any matching symbols without debug info.
3146 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3148 ALL_MSYMBOLS (objfile
, msymbol
)
3150 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3151 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3152 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3153 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3156 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3158 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3160 /* FIXME: carlton/2003-02-04: Given that the
3161 semantics of lookup_symbol keeps on changing
3162 slightly, it would be a nice idea if we had a
3163 function lookup_symbol_minsym that found the
3164 symbol associated to a given minimal symbol (if
3166 if (kind
== FUNCTIONS_DOMAIN
3167 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3168 (struct block
*) NULL
,
3178 ALL_PRIMARY_SYMTABS (objfile
, s
)
3180 bv
= BLOCKVECTOR (s
);
3181 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3183 struct symbol_search
*prevtail
= tail
;
3185 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3186 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3188 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3191 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3193 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3194 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3195 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3196 && SYMBOL_CLASS (sym
) != LOC_CONST
)
3197 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3198 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3199 || (kind
== METHODS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
))))
3202 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3204 psr
->symtab
= real_symtab
;
3206 psr
->msymbol
= NULL
;
3218 if (prevtail
== NULL
)
3220 struct symbol_search dummy
;
3223 tail
= sort_search_symbols (&dummy
, nfound
);
3226 old_chain
= make_cleanup_free_search_symbols (sr
);
3229 tail
= sort_search_symbols (prevtail
, nfound
);
3234 /* If there are no eyes, avoid all contact. I mean, if there are
3235 no debug symbols, then print directly from the msymbol_vector. */
3237 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3239 ALL_MSYMBOLS (objfile
, msymbol
)
3241 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3242 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3243 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3244 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3247 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3249 /* Functions: Look up by address. */
3250 if (kind
!= FUNCTIONS_DOMAIN
||
3251 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3253 /* Variables/Absolutes: Look up by name */
3254 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3255 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3259 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3261 psr
->msymbol
= msymbol
;
3268 old_chain
= make_cleanup_free_search_symbols (sr
);
3282 discard_cleanups (old_chain
);
3285 /* Helper function for symtab_symbol_info, this function uses
3286 the data returned from search_symbols() to print information
3287 regarding the match to gdb_stdout.
3290 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3291 int block
, char *last
)
3293 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3295 fputs_filtered ("\nFile ", gdb_stdout
);
3296 fputs_filtered (s
->filename
, gdb_stdout
);
3297 fputs_filtered (":\n", gdb_stdout
);
3300 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3301 printf_filtered ("static ");
3303 /* Typedef that is not a C++ class */
3304 if (kind
== TYPES_DOMAIN
3305 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3306 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3307 /* variable, func, or typedef-that-is-c++-class */
3308 else if (kind
< TYPES_DOMAIN
||
3309 (kind
== TYPES_DOMAIN
&&
3310 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3312 type_print (SYMBOL_TYPE (sym
),
3313 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3314 ? "" : SYMBOL_PRINT_NAME (sym
)),
3317 printf_filtered (";\n");
3321 /* This help function for symtab_symbol_info() prints information
3322 for non-debugging symbols to gdb_stdout.
3325 print_msymbol_info (struct minimal_symbol
*msymbol
)
3329 if (gdbarch_addr_bit (current_gdbarch
) <= 32)
3330 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3331 & (CORE_ADDR
) 0xffffffff,
3334 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3336 printf_filtered ("%s %s\n",
3337 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3340 /* This is the guts of the commands "info functions", "info types", and
3341 "info variables". It calls search_symbols to find all matches and then
3342 print_[m]symbol_info to print out some useful information about the
3346 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3348 static char *classnames
[]
3350 {"variable", "function", "type", "method"};
3351 struct symbol_search
*symbols
;
3352 struct symbol_search
*p
;
3353 struct cleanup
*old_chain
;
3354 char *last_filename
= NULL
;
3357 /* must make sure that if we're interrupted, symbols gets freed */
3358 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3359 old_chain
= make_cleanup_free_search_symbols (symbols
);
3361 printf_filtered (regexp
3362 ? "All %ss matching regular expression \"%s\":\n"
3363 : "All defined %ss:\n",
3364 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3366 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3370 if (p
->msymbol
!= NULL
)
3374 printf_filtered ("\nNon-debugging symbols:\n");
3377 print_msymbol_info (p
->msymbol
);
3381 print_symbol_info (kind
,
3386 last_filename
= p
->symtab
->filename
;
3390 do_cleanups (old_chain
);
3394 variables_info (char *regexp
, int from_tty
)
3396 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3400 functions_info (char *regexp
, int from_tty
)
3402 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3407 types_info (char *regexp
, int from_tty
)
3409 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3412 /* Breakpoint all functions matching regular expression. */
3415 rbreak_command_wrapper (char *regexp
, int from_tty
)
3417 rbreak_command (regexp
, from_tty
);
3421 rbreak_command (char *regexp
, int from_tty
)
3423 struct symbol_search
*ss
;
3424 struct symbol_search
*p
;
3425 struct cleanup
*old_chain
;
3427 search_symbols (regexp
, FUNCTIONS_DOMAIN
, 0, (char **) NULL
, &ss
);
3428 old_chain
= make_cleanup_free_search_symbols (ss
);
3430 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3432 if (p
->msymbol
== NULL
)
3434 char *string
= alloca (strlen (p
->symtab
->filename
)
3435 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3437 strcpy (string
, p
->symtab
->filename
);
3438 strcat (string
, ":'");
3439 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3440 strcat (string
, "'");
3441 break_command (string
, from_tty
);
3442 print_symbol_info (FUNCTIONS_DOMAIN
,
3446 p
->symtab
->filename
);
3450 char *string
= alloca (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
))
3452 strcpy (string
, "'");
3453 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3454 strcat (string
, "'");
3456 break_command (string
, from_tty
);
3457 printf_filtered ("<function, no debug info> %s;\n",
3458 SYMBOL_PRINT_NAME (p
->msymbol
));
3462 do_cleanups (old_chain
);
3466 /* Helper routine for make_symbol_completion_list. */
3468 static int return_val_size
;
3469 static int return_val_index
;
3470 static char **return_val
;
3472 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3473 completion_list_add_name \
3474 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3476 /* Test to see if the symbol specified by SYMNAME (which is already
3477 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3478 characters. If so, add it to the current completion list. */
3481 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3482 char *text
, char *word
)
3487 /* clip symbols that cannot match */
3489 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3494 /* We have a match for a completion, so add SYMNAME to the current list
3495 of matches. Note that the name is moved to freshly malloc'd space. */
3499 if (word
== sym_text
)
3501 new = xmalloc (strlen (symname
) + 5);
3502 strcpy (new, symname
);
3504 else if (word
> sym_text
)
3506 /* Return some portion of symname. */
3507 new = xmalloc (strlen (symname
) + 5);
3508 strcpy (new, symname
+ (word
- sym_text
));
3512 /* Return some of SYM_TEXT plus symname. */
3513 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3514 strncpy (new, word
, sym_text
- word
);
3515 new[sym_text
- word
] = '\0';
3516 strcat (new, symname
);
3519 if (return_val_index
+ 3 > return_val_size
)
3521 newsize
= (return_val_size
*= 2) * sizeof (char *);
3522 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3524 return_val
[return_val_index
++] = new;
3525 return_val
[return_val_index
] = NULL
;
3529 /* ObjC: In case we are completing on a selector, look as the msymbol
3530 again and feed all the selectors into the mill. */
3533 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3534 int sym_text_len
, char *text
, char *word
)
3536 static char *tmp
= NULL
;
3537 static unsigned int tmplen
= 0;
3539 char *method
, *category
, *selector
;
3542 method
= SYMBOL_NATURAL_NAME (msymbol
);
3544 /* Is it a method? */
3545 if ((method
[0] != '-') && (method
[0] != '+'))
3548 if (sym_text
[0] == '[')
3549 /* Complete on shortened method method. */
3550 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3552 while ((strlen (method
) + 1) >= tmplen
)
3558 tmp
= xrealloc (tmp
, tmplen
);
3560 selector
= strchr (method
, ' ');
3561 if (selector
!= NULL
)
3564 category
= strchr (method
, '(');
3566 if ((category
!= NULL
) && (selector
!= NULL
))
3568 memcpy (tmp
, method
, (category
- method
));
3569 tmp
[category
- method
] = ' ';
3570 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3571 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3572 if (sym_text
[0] == '[')
3573 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3576 if (selector
!= NULL
)
3578 /* Complete on selector only. */
3579 strcpy (tmp
, selector
);
3580 tmp2
= strchr (tmp
, ']');
3584 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3588 /* Break the non-quoted text based on the characters which are in
3589 symbols. FIXME: This should probably be language-specific. */
3592 language_search_unquoted_string (char *text
, char *p
)
3594 for (; p
> text
; --p
)
3596 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3600 if ((current_language
->la_language
== language_objc
))
3602 if (p
[-1] == ':') /* might be part of a method name */
3604 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3605 p
-= 2; /* beginning of a method name */
3606 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3607 { /* might be part of a method name */
3610 /* Seeing a ' ' or a '(' is not conclusive evidence
3611 that we are in the middle of a method name. However,
3612 finding "-[" or "+[" should be pretty un-ambiguous.
3613 Unfortunately we have to find it now to decide. */
3616 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3617 t
[-1] == ' ' || t
[-1] == ':' ||
3618 t
[-1] == '(' || t
[-1] == ')')
3623 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3624 p
= t
- 2; /* method name detected */
3625 /* else we leave with p unchanged */
3635 default_make_symbol_completion_list (char *text
, char *word
)
3637 /* Problem: All of the symbols have to be copied because readline
3638 frees them. I'm not going to worry about this; hopefully there
3639 won't be that many. */
3643 struct partial_symtab
*ps
;
3644 struct minimal_symbol
*msymbol
;
3645 struct objfile
*objfile
;
3646 struct block
*b
, *surrounding_static_block
= 0;
3647 struct dict_iterator iter
;
3649 struct partial_symbol
**psym
;
3650 /* The symbol we are completing on. Points in same buffer as text. */
3652 /* Length of sym_text. */
3655 /* Now look for the symbol we are supposed to complete on. */
3659 char *quote_pos
= NULL
;
3661 /* First see if this is a quoted string. */
3663 for (p
= text
; *p
!= '\0'; ++p
)
3665 if (quote_found
!= '\0')
3667 if (*p
== quote_found
)
3668 /* Found close quote. */
3670 else if (*p
== '\\' && p
[1] == quote_found
)
3671 /* A backslash followed by the quote character
3672 doesn't end the string. */
3675 else if (*p
== '\'' || *p
== '"')
3681 if (quote_found
== '\'')
3682 /* A string within single quotes can be a symbol, so complete on it. */
3683 sym_text
= quote_pos
+ 1;
3684 else if (quote_found
== '"')
3685 /* A double-quoted string is never a symbol, nor does it make sense
3686 to complete it any other way. */
3688 return_val
= (char **) xmalloc (sizeof (char *));
3689 return_val
[0] = NULL
;
3694 /* It is not a quoted string. Break it based on the characters
3695 which are in symbols. */
3698 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3707 sym_text_len
= strlen (sym_text
);
3709 return_val_size
= 100;
3710 return_val_index
= 0;
3711 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3712 return_val
[0] = NULL
;
3714 /* Look through the partial symtabs for all symbols which begin
3715 by matching SYM_TEXT. Add each one that you find to the list. */
3717 ALL_PSYMTABS (objfile
, ps
)
3719 /* If the psymtab's been read in we'll get it when we search
3720 through the blockvector. */
3724 for (psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3725 psym
< (objfile
->global_psymbols
.list
+ ps
->globals_offset
3726 + ps
->n_global_syms
);
3729 /* If interrupted, then quit. */
3731 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3734 for (psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3735 psym
< (objfile
->static_psymbols
.list
+ ps
->statics_offset
3736 + ps
->n_static_syms
);
3740 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3744 /* At this point scan through the misc symbol vectors and add each
3745 symbol you find to the list. Eventually we want to ignore
3746 anything that isn't a text symbol (everything else will be
3747 handled by the psymtab code above). */
3749 ALL_MSYMBOLS (objfile
, msymbol
)
3752 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3754 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3757 /* Search upwards from currently selected frame (so that we can
3758 complete on local vars. */
3760 for (b
= get_selected_block (0); b
!= NULL
; b
= BLOCK_SUPERBLOCK (b
))
3762 if (!BLOCK_SUPERBLOCK (b
))
3764 surrounding_static_block
= b
; /* For elmin of dups */
3767 /* Also catch fields of types defined in this places which match our
3768 text string. Only complete on types visible from current context. */
3770 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3773 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3774 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3776 struct type
*t
= SYMBOL_TYPE (sym
);
3777 enum type_code c
= TYPE_CODE (t
);
3779 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3781 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3783 if (TYPE_FIELD_NAME (t
, j
))
3785 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3786 sym_text
, sym_text_len
, text
, word
);
3794 /* Go through the symtabs and check the externs and statics for
3795 symbols which match. */
3797 ALL_PRIMARY_SYMTABS (objfile
, s
)
3800 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3801 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3803 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3807 ALL_PRIMARY_SYMTABS (objfile
, s
)
3810 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3811 /* Don't do this block twice. */
3812 if (b
== surrounding_static_block
)
3814 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3816 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3820 return (return_val
);
3823 /* Return a NULL terminated array of all symbols (regardless of class)
3824 which begin by matching TEXT. If the answer is no symbols, then
3825 the return value is an array which contains only a NULL pointer. */
3828 make_symbol_completion_list (char *text
, char *word
)
3830 return current_language
->la_make_symbol_completion_list (text
, word
);
3833 /* Like make_symbol_completion_list, but returns a list of symbols
3834 defined in a source file FILE. */
3837 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3842 struct dict_iterator iter
;
3843 /* The symbol we are completing on. Points in same buffer as text. */
3845 /* Length of sym_text. */
3848 /* Now look for the symbol we are supposed to complete on.
3849 FIXME: This should be language-specific. */
3853 char *quote_pos
= NULL
;
3855 /* First see if this is a quoted string. */
3857 for (p
= text
; *p
!= '\0'; ++p
)
3859 if (quote_found
!= '\0')
3861 if (*p
== quote_found
)
3862 /* Found close quote. */
3864 else if (*p
== '\\' && p
[1] == quote_found
)
3865 /* A backslash followed by the quote character
3866 doesn't end the string. */
3869 else if (*p
== '\'' || *p
== '"')
3875 if (quote_found
== '\'')
3876 /* A string within single quotes can be a symbol, so complete on it. */
3877 sym_text
= quote_pos
+ 1;
3878 else if (quote_found
== '"')
3879 /* A double-quoted string is never a symbol, nor does it make sense
3880 to complete it any other way. */
3882 return_val
= (char **) xmalloc (sizeof (char *));
3883 return_val
[0] = NULL
;
3888 /* Not a quoted string. */
3889 sym_text
= language_search_unquoted_string (text
, p
);
3893 sym_text_len
= strlen (sym_text
);
3895 return_val_size
= 10;
3896 return_val_index
= 0;
3897 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3898 return_val
[0] = NULL
;
3900 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3902 s
= lookup_symtab (srcfile
);
3905 /* Maybe they typed the file with leading directories, while the
3906 symbol tables record only its basename. */
3907 const char *tail
= lbasename (srcfile
);
3910 s
= lookup_symtab (tail
);
3913 /* If we have no symtab for that file, return an empty list. */
3915 return (return_val
);
3917 /* Go through this symtab and check the externs and statics for
3918 symbols which match. */
3920 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3921 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3923 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3926 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3927 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3929 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3932 return (return_val
);
3935 /* A helper function for make_source_files_completion_list. It adds
3936 another file name to a list of possible completions, growing the
3937 list as necessary. */
3940 add_filename_to_list (const char *fname
, char *text
, char *word
,
3941 char ***list
, int *list_used
, int *list_alloced
)
3944 size_t fnlen
= strlen (fname
);
3946 if (*list_used
+ 1 >= *list_alloced
)
3949 *list
= (char **) xrealloc ((char *) *list
,
3950 *list_alloced
* sizeof (char *));
3955 /* Return exactly fname. */
3956 new = xmalloc (fnlen
+ 5);
3957 strcpy (new, fname
);
3959 else if (word
> text
)
3961 /* Return some portion of fname. */
3962 new = xmalloc (fnlen
+ 5);
3963 strcpy (new, fname
+ (word
- text
));
3967 /* Return some of TEXT plus fname. */
3968 new = xmalloc (fnlen
+ (text
- word
) + 5);
3969 strncpy (new, word
, text
- word
);
3970 new[text
- word
] = '\0';
3971 strcat (new, fname
);
3973 (*list
)[*list_used
] = new;
3974 (*list
)[++*list_used
] = NULL
;
3978 not_interesting_fname (const char *fname
)
3980 static const char *illegal_aliens
[] = {
3981 "_globals_", /* inserted by coff_symtab_read */
3986 for (i
= 0; illegal_aliens
[i
]; i
++)
3988 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
3994 /* Return a NULL terminated array of all source files whose names
3995 begin with matching TEXT. The file names are looked up in the
3996 symbol tables of this program. If the answer is no matchess, then
3997 the return value is an array which contains only a NULL pointer. */
4000 make_source_files_completion_list (char *text
, char *word
)
4003 struct partial_symtab
*ps
;
4004 struct objfile
*objfile
;
4006 int list_alloced
= 1;
4008 size_t text_len
= strlen (text
);
4009 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4010 const char *base_name
;
4014 if (!have_full_symbols () && !have_partial_symbols ())
4017 ALL_SYMTABS (objfile
, s
)
4019 if (not_interesting_fname (s
->filename
))
4021 if (!filename_seen (s
->filename
, 1, &first
)
4022 #if HAVE_DOS_BASED_FILE_SYSTEM
4023 && strncasecmp (s
->filename
, text
, text_len
) == 0
4025 && strncmp (s
->filename
, text
, text_len
) == 0
4029 /* This file matches for a completion; add it to the current
4031 add_filename_to_list (s
->filename
, text
, word
,
4032 &list
, &list_used
, &list_alloced
);
4036 /* NOTE: We allow the user to type a base name when the
4037 debug info records leading directories, but not the other
4038 way around. This is what subroutines of breakpoint
4039 command do when they parse file names. */
4040 base_name
= lbasename (s
->filename
);
4041 if (base_name
!= s
->filename
4042 && !filename_seen (base_name
, 1, &first
)
4043 #if HAVE_DOS_BASED_FILE_SYSTEM
4044 && strncasecmp (base_name
, text
, text_len
) == 0
4046 && strncmp (base_name
, text
, text_len
) == 0
4049 add_filename_to_list (base_name
, text
, word
,
4050 &list
, &list_used
, &list_alloced
);
4054 ALL_PSYMTABS (objfile
, ps
)
4056 if (not_interesting_fname (ps
->filename
))
4060 if (!filename_seen (ps
->filename
, 1, &first
)
4061 #if HAVE_DOS_BASED_FILE_SYSTEM
4062 && strncasecmp (ps
->filename
, text
, text_len
) == 0
4064 && strncmp (ps
->filename
, text
, text_len
) == 0
4068 /* This file matches for a completion; add it to the
4069 current list of matches. */
4070 add_filename_to_list (ps
->filename
, text
, word
,
4071 &list
, &list_used
, &list_alloced
);
4076 base_name
= lbasename (ps
->filename
);
4077 if (base_name
!= ps
->filename
4078 && !filename_seen (base_name
, 1, &first
)
4079 #if HAVE_DOS_BASED_FILE_SYSTEM
4080 && strncasecmp (base_name
, text
, text_len
) == 0
4082 && strncmp (base_name
, text
, text_len
) == 0
4085 add_filename_to_list (base_name
, text
, word
,
4086 &list
, &list_used
, &list_alloced
);
4094 /* Determine if PC is in the prologue of a function. The prologue is the area
4095 between the first instruction of a function, and the first executable line.
4096 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4098 If non-zero, func_start is where we think the prologue starts, possibly
4099 by previous examination of symbol table information.
4103 in_prologue (CORE_ADDR pc
, CORE_ADDR func_start
)
4105 struct symtab_and_line sal
;
4106 CORE_ADDR func_addr
, func_end
;
4108 /* We have several sources of information we can consult to figure
4110 - Compilers usually emit line number info that marks the prologue
4111 as its own "source line". So the ending address of that "line"
4112 is the end of the prologue. If available, this is the most
4114 - The minimal symbols and partial symbols, which can usually tell
4115 us the starting and ending addresses of a function.
4116 - If we know the function's start address, we can call the
4117 architecture-defined gdbarch_skip_prologue function to analyze the
4118 instruction stream and guess where the prologue ends.
4119 - Our `func_start' argument; if non-zero, this is the caller's
4120 best guess as to the function's entry point. At the time of
4121 this writing, handle_inferior_event doesn't get this right, so
4122 it should be our last resort. */
4124 /* Consult the partial symbol table, to find which function
4126 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4128 CORE_ADDR prologue_end
;
4130 /* We don't even have minsym information, so fall back to using
4131 func_start, if given. */
4133 return 1; /* We *might* be in a prologue. */
4135 prologue_end
= gdbarch_skip_prologue (current_gdbarch
, func_start
);
4137 return func_start
<= pc
&& pc
< prologue_end
;
4140 /* If we have line number information for the function, that's
4141 usually pretty reliable. */
4142 sal
= find_pc_line (func_addr
, 0);
4144 /* Now sal describes the source line at the function's entry point,
4145 which (by convention) is the prologue. The end of that "line",
4146 sal.end, is the end of the prologue.
4148 Note that, for functions whose source code is all on a single
4149 line, the line number information doesn't always end up this way.
4150 So we must verify that our purported end-of-prologue address is
4151 *within* the function, not at its start or end. */
4153 || sal
.end
<= func_addr
4154 || func_end
<= sal
.end
)
4156 /* We don't have any good line number info, so use the minsym
4157 information, together with the architecture-specific prologue
4159 CORE_ADDR prologue_end
= gdbarch_skip_prologue
4160 (current_gdbarch
, func_addr
);
4162 return func_addr
<= pc
&& pc
< prologue_end
;
4165 /* We have line number info, and it looks good. */
4166 return func_addr
<= pc
&& pc
< sal
.end
;
4169 /* Given PC at the function's start address, attempt to find the
4170 prologue end using SAL information. Return zero if the skip fails.
4172 A non-optimized prologue traditionally has one SAL for the function
4173 and a second for the function body. A single line function has
4174 them both pointing at the same line.
4176 An optimized prologue is similar but the prologue may contain
4177 instructions (SALs) from the instruction body. Need to skip those
4178 while not getting into the function body.
4180 The functions end point and an increasing SAL line are used as
4181 indicators of the prologue's endpoint.
4183 This code is based on the function refine_prologue_limit (versions
4184 found in both ia64 and ppc). */
4187 skip_prologue_using_sal (CORE_ADDR func_addr
)
4189 struct symtab_and_line prologue_sal
;
4193 /* Get an initial range for the function. */
4194 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4195 start_pc
+= gdbarch_deprecated_function_start_offset (current_gdbarch
);
4197 prologue_sal
= find_pc_line (start_pc
, 0);
4198 if (prologue_sal
.line
!= 0)
4200 /* If there is only one sal that covers the entire function,
4201 then it is probably a single line function, like
4203 if (prologue_sal
.end
>= end_pc
)
4205 while (prologue_sal
.end
< end_pc
)
4207 struct symtab_and_line sal
;
4209 sal
= find_pc_line (prologue_sal
.end
, 0);
4212 /* Assume that a consecutive SAL for the same (or larger)
4213 line mark the prologue -> body transition. */
4214 if (sal
.line
>= prologue_sal
.line
)
4216 /* The case in which compiler's optimizer/scheduler has
4217 moved instructions into the prologue. We look ahead in
4218 the function looking for address ranges whose
4219 corresponding line number is less the first one that we
4220 found for the function. This is more conservative then
4221 refine_prologue_limit which scans a large number of SALs
4222 looking for any in the prologue */
4226 return prologue_sal
.end
;
4229 struct symtabs_and_lines
4230 decode_line_spec (char *string
, int funfirstline
)
4232 struct symtabs_and_lines sals
;
4233 struct symtab_and_line cursal
;
4236 error (_("Empty line specification."));
4238 /* We use whatever is set as the current source line. We do not try
4239 and get a default or it will recursively call us! */
4240 cursal
= get_current_source_symtab_and_line ();
4242 sals
= decode_line_1 (&string
, funfirstline
,
4243 cursal
.symtab
, cursal
.line
,
4244 (char ***) NULL
, NULL
);
4247 error (_("Junk at end of line specification: %s"), string
);
4252 static char *name_of_main
;
4255 set_main_name (const char *name
)
4257 if (name_of_main
!= NULL
)
4259 xfree (name_of_main
);
4260 name_of_main
= NULL
;
4264 name_of_main
= xstrdup (name
);
4268 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4272 find_main_name (void)
4274 const char *new_main_name
;
4276 /* Try to see if the main procedure is in Ada. */
4277 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4278 be to add a new method in the language vector, and call this
4279 method for each language until one of them returns a non-empty
4280 name. This would allow us to remove this hard-coded call to
4281 an Ada function. It is not clear that this is a better approach
4282 at this point, because all methods need to be written in a way
4283 such that false positives never be returned. For instance, it is
4284 important that a method does not return a wrong name for the main
4285 procedure if the main procedure is actually written in a different
4286 language. It is easy to guaranty this with Ada, since we use a
4287 special symbol generated only when the main in Ada to find the name
4288 of the main procedure. It is difficult however to see how this can
4289 be guarantied for languages such as C, for instance. This suggests
4290 that order of call for these methods becomes important, which means
4291 a more complicated approach. */
4292 new_main_name
= ada_main_name ();
4293 if (new_main_name
!= NULL
)
4295 set_main_name (new_main_name
);
4299 new_main_name
= pascal_main_name ();
4300 if (new_main_name
!= NULL
)
4302 set_main_name (new_main_name
);
4306 /* The languages above didn't identify the name of the main procedure.
4307 Fallback to "main". */
4308 set_main_name ("main");
4314 if (name_of_main
== NULL
)
4317 return name_of_main
;
4320 /* Handle ``executable_changed'' events for the symtab module. */
4323 symtab_observer_executable_changed (void *unused
)
4325 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4326 set_main_name (NULL
);
4329 /* Helper to expand_line_sal below. Appends new sal to SAL,
4330 initializing it from SYMTAB, LINENO and PC. */
4332 append_expanded_sal (struct symtabs_and_lines
*sal
,
4333 struct symtab
*symtab
,
4334 int lineno
, CORE_ADDR pc
)
4336 CORE_ADDR func_addr
, func_end
;
4338 sal
->sals
= xrealloc (sal
->sals
,
4339 sizeof (sal
->sals
[0])
4340 * (sal
->nelts
+ 1));
4341 init_sal (sal
->sals
+ sal
->nelts
);
4342 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4343 sal
->sals
[sal
->nelts
].section
= NULL
;
4344 sal
->sals
[sal
->nelts
].end
= 0;
4345 sal
->sals
[sal
->nelts
].line
= lineno
;
4346 sal
->sals
[sal
->nelts
].pc
= pc
;
4350 /* Compute a set of all sals in
4351 the entire program that correspond to same file
4352 and line as SAL and return those. If there
4353 are several sals that belong to the same block,
4354 only one sal for the block is included in results. */
4356 struct symtabs_and_lines
4357 expand_line_sal (struct symtab_and_line sal
)
4359 struct symtabs_and_lines ret
, this_line
;
4361 struct objfile
*objfile
;
4362 struct partial_symtab
*psymtab
;
4363 struct symtab
*symtab
;
4366 struct block
**blocks
= NULL
;
4372 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4374 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4381 struct linetable_entry
*best_item
= 0;
4382 struct symtab
*best_symtab
= 0;
4387 /* We meed to find all symtabs for a file which name
4388 is described by sal. We cannot just directly
4389 iterate over symtabs, since a symtab might not be
4390 yet created. We also cannot iterate over psymtabs,
4391 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4392 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4393 corresponding to an included file. Therefore, we do
4394 first pass over psymtabs, reading in those with
4395 the right name. Then, we iterate over symtabs, knowing
4396 that all symtabs we're interested in are loaded. */
4398 ALL_PSYMTABS (objfile
, psymtab
)
4400 if (strcmp (sal
.symtab
->filename
,
4401 psymtab
->filename
) == 0)
4402 PSYMTAB_TO_SYMTAB (psymtab
);
4406 /* For each symtab, we add all pcs to ret.sals. I'm actually
4407 not sure what to do if we have exact match in one symtab,
4408 and non-exact match on another symtab.
4410 ALL_SYMTABS (objfile
, symtab
)
4412 if (strcmp (sal
.symtab
->filename
,
4413 symtab
->filename
) == 0)
4415 struct linetable
*l
;
4417 l
= LINETABLE (symtab
);
4422 for (j
= 0; j
< len
; j
++)
4424 struct linetable_entry
*item
= &(l
->item
[j
]);
4426 if (item
->line
== lineno
)
4429 append_expanded_sal (&ret
, symtab
, lineno
, item
->pc
);
4431 else if (!exact
&& item
->line
> lineno
4432 && (best_item
== NULL
|| item
->line
< best_item
->line
))
4436 best_symtab
= symtab
;
4441 if (!exact
&& best_item
)
4442 append_expanded_sal (&ret
, best_symtab
, lineno
, best_item
->pc
);
4445 /* For optimized code, compiler can scatter one source line accross
4446 disjoint ranges of PC values, even when no duplicate functions
4447 or inline functions are involved. For example, 'for (;;)' inside
4448 non-template non-inline non-ctor-or-dtor function can result
4449 in two PC ranges. In this case, we don't want to set breakpoint
4450 on first PC of each range. To filter such cases, we use containing
4451 blocks -- for each PC found above we see if there are other PCs
4452 that are in the same block. If yes, the other PCs are filtered out. */
4454 filter
= xmalloc (ret
.nelts
* sizeof (int));
4455 blocks
= xmalloc (ret
.nelts
* sizeof (struct block
*));
4456 for (i
= 0; i
< ret
.nelts
; ++i
)
4459 blocks
[i
] = block_for_pc (ret
.sals
[i
].pc
);
4462 for (i
= 0; i
< ret
.nelts
; ++i
)
4463 if (blocks
[i
] != NULL
)
4464 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4465 if (blocks
[j
] == blocks
[i
])
4473 struct symtab_and_line
*final
=
4474 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4476 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4478 final
[j
++] = ret
.sals
[i
];
4480 ret
.nelts
-= deleted
;
4490 _initialize_symtab (void)
4492 add_info ("variables", variables_info
, _("\
4493 All global and static variable names, or those matching REGEXP."));
4495 add_com ("whereis", class_info
, variables_info
, _("\
4496 All global and static variable names, or those matching REGEXP."));
4498 add_info ("functions", functions_info
,
4499 _("All function names, or those matching REGEXP."));
4502 /* FIXME: This command has at least the following problems:
4503 1. It prints builtin types (in a very strange and confusing fashion).
4504 2. It doesn't print right, e.g. with
4505 typedef struct foo *FOO
4506 type_print prints "FOO" when we want to make it (in this situation)
4507 print "struct foo *".
4508 I also think "ptype" or "whatis" is more likely to be useful (but if
4509 there is much disagreement "info types" can be fixed). */
4510 add_info ("types", types_info
,
4511 _("All type names, or those matching REGEXP."));
4513 add_info ("sources", sources_info
,
4514 _("Source files in the program."));
4516 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4517 _("Set a breakpoint for all functions matching REGEXP."));
4521 add_com ("lf", class_info
, sources_info
,
4522 _("Source files in the program"));
4523 add_com ("lg", class_info
, variables_info
, _("\
4524 All global and static variable names, or those matching REGEXP."));
4527 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4528 multiple_symbols_modes
, &multiple_symbols_mode
,
4530 Set the debugger behavior when more than one symbol are possible matches\n\
4531 in an expression."), _("\
4532 Show how the debugger handles ambiguities in expressions."), _("\
4533 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4534 NULL
, NULL
, &setlist
, &showlist
);
4536 /* Initialize the one built-in type that isn't language dependent... */
4537 builtin_type_error
= init_type (TYPE_CODE_ERROR
, 0, 0,
4538 "<unknown type>", (struct objfile
*) NULL
);
4540 observer_attach_executable_changed (symtab_observer_executable_changed
);