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, 2009
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"
58 #include "cp-support.h"
60 #include "gdb_assert.h"
63 #include "macroscope.h"
65 /* Prototypes for local functions */
67 static void completion_list_add_name (char *, char *, int, char *, char *);
69 static void rbreak_command (char *, int);
71 static void types_info (char *, int);
73 static void functions_info (char *, int);
75 static void variables_info (char *, int);
77 static void sources_info (char *, int);
79 static void output_source_filename (const char *, int *);
81 static int find_line_common (struct linetable
*, int, int *);
83 /* This one is used by linespec.c */
85 char *operator_chars (char *p
, char **end
);
87 static struct symbol
*lookup_symbol_aux (const char *name
,
88 const char *linkage_name
,
89 const struct block
*block
,
90 const domain_enum domain
,
91 enum language language
,
92 int *is_a_field_of_this
);
95 struct symbol
*lookup_symbol_aux_local (const char *name
,
96 const char *linkage_name
,
97 const struct block
*block
,
98 const domain_enum domain
);
101 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
103 const char *linkage_name
,
104 const domain_enum domain
);
107 struct symbol
*lookup_symbol_aux_psymtabs (int block_index
,
109 const char *linkage_name
,
110 const domain_enum domain
);
112 static int file_matches (char *, char **, int);
114 static void print_symbol_info (domain_enum
,
115 struct symtab
*, struct symbol
*, int, char *);
117 static void print_msymbol_info (struct minimal_symbol
*);
119 static void symtab_symbol_info (char *, domain_enum
, int);
121 void _initialize_symtab (void);
125 /* Allow the user to configure the debugger behavior with respect
126 to multiple-choice menus when more than one symbol matches during
129 const char multiple_symbols_ask
[] = "ask";
130 const char multiple_symbols_all
[] = "all";
131 const char multiple_symbols_cancel
[] = "cancel";
132 static const char *multiple_symbols_modes
[] =
134 multiple_symbols_ask
,
135 multiple_symbols_all
,
136 multiple_symbols_cancel
,
139 static const char *multiple_symbols_mode
= multiple_symbols_all
;
141 /* Read-only accessor to AUTO_SELECT_MODE. */
144 multiple_symbols_select_mode (void)
146 return multiple_symbols_mode
;
149 /* The single non-language-specific builtin type */
150 struct type
*builtin_type_error
;
152 /* Block in which the most recently searched-for symbol was found.
153 Might be better to make this a parameter to lookup_symbol and
156 const struct block
*block_found
;
158 /* Check for a symtab of a specific name; first in symtabs, then in
159 psymtabs. *If* there is no '/' in the name, a match after a '/'
160 in the symtab filename will also work. */
163 lookup_symtab (const char *name
)
166 struct partial_symtab
*ps
;
167 struct objfile
*objfile
;
168 char *real_path
= NULL
;
169 char *full_path
= NULL
;
171 /* Here we are interested in canonicalizing an absolute path, not
172 absolutizing a relative path. */
173 if (IS_ABSOLUTE_PATH (name
))
175 full_path
= xfullpath (name
);
176 make_cleanup (xfree
, full_path
);
177 real_path
= gdb_realpath (name
);
178 make_cleanup (xfree
, real_path
);
183 /* First, search for an exact match */
185 ALL_SYMTABS (objfile
, s
)
187 if (FILENAME_CMP (name
, s
->filename
) == 0)
192 /* If the user gave us an absolute path, try to find the file in
193 this symtab and use its absolute path. */
195 if (full_path
!= NULL
)
197 const char *fp
= symtab_to_fullname (s
);
198 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
204 if (real_path
!= NULL
)
206 char *fullname
= symtab_to_fullname (s
);
207 if (fullname
!= NULL
)
209 char *rp
= gdb_realpath (fullname
);
210 make_cleanup (xfree
, rp
);
211 if (FILENAME_CMP (real_path
, rp
) == 0)
219 /* Now, search for a matching tail (only if name doesn't have any dirs) */
221 if (lbasename (name
) == name
)
222 ALL_SYMTABS (objfile
, s
)
224 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
228 /* Same search rules as above apply here, but now we look thru the
231 ps
= lookup_partial_symtab (name
);
236 error (_("Internal: readin %s pst for `%s' found when no symtab found."),
239 s
= PSYMTAB_TO_SYMTAB (ps
);
244 /* At this point, we have located the psymtab for this file, but
245 the conversion to a symtab has failed. This usually happens
246 when we are looking up an include file. In this case,
247 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
248 been created. So, we need to run through the symtabs again in
249 order to find the file.
250 XXX - This is a crock, and should be fixed inside of the the
251 symbol parsing routines. */
255 /* Lookup the partial symbol table of a source file named NAME.
256 *If* there is no '/' in the name, a match after a '/'
257 in the psymtab filename will also work. */
259 struct partial_symtab
*
260 lookup_partial_symtab (const char *name
)
262 struct partial_symtab
*pst
;
263 struct objfile
*objfile
;
264 char *full_path
= NULL
;
265 char *real_path
= NULL
;
267 /* Here we are interested in canonicalizing an absolute path, not
268 absolutizing a relative path. */
269 if (IS_ABSOLUTE_PATH (name
))
271 full_path
= xfullpath (name
);
272 make_cleanup (xfree
, full_path
);
273 real_path
= gdb_realpath (name
);
274 make_cleanup (xfree
, real_path
);
277 ALL_PSYMTABS (objfile
, pst
)
279 if (FILENAME_CMP (name
, pst
->filename
) == 0)
284 /* If the user gave us an absolute path, try to find the file in
285 this symtab and use its absolute path. */
286 if (full_path
!= NULL
)
288 psymtab_to_fullname (pst
);
289 if (pst
->fullname
!= NULL
290 && FILENAME_CMP (full_path
, pst
->fullname
) == 0)
296 if (real_path
!= NULL
)
299 psymtab_to_fullname (pst
);
300 if (pst
->fullname
!= NULL
)
302 rp
= gdb_realpath (pst
->fullname
);
303 make_cleanup (xfree
, rp
);
305 if (rp
!= NULL
&& FILENAME_CMP (real_path
, rp
) == 0)
312 /* Now, search for a matching tail (only if name doesn't have any dirs) */
314 if (lbasename (name
) == name
)
315 ALL_PSYMTABS (objfile
, pst
)
317 if (FILENAME_CMP (lbasename (pst
->filename
), name
) == 0)
324 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
325 full method name, which consist of the class name (from T), the unadorned
326 method name from METHOD_ID, and the signature for the specific overload,
327 specified by SIGNATURE_ID. Note that this function is g++ specific. */
330 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
332 int mangled_name_len
;
334 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
335 struct fn_field
*method
= &f
[signature_id
];
336 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
337 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
338 char *newname
= type_name_no_tag (type
);
340 /* Does the form of physname indicate that it is the full mangled name
341 of a constructor (not just the args)? */
342 int is_full_physname_constructor
;
345 int is_destructor
= is_destructor_name (physname
);
346 /* Need a new type prefix. */
347 char *const_prefix
= method
->is_const
? "C" : "";
348 char *volatile_prefix
= method
->is_volatile
? "V" : "";
350 int len
= (newname
== NULL
? 0 : strlen (newname
));
352 /* Nothing to do if physname already contains a fully mangled v3 abi name
353 or an operator name. */
354 if ((physname
[0] == '_' && physname
[1] == 'Z')
355 || is_operator_name (field_name
))
356 return xstrdup (physname
);
358 is_full_physname_constructor
= is_constructor_name (physname
);
361 is_full_physname_constructor
|| (newname
&& strcmp (field_name
, newname
) == 0);
364 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
366 if (is_destructor
|| is_full_physname_constructor
)
368 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
369 strcpy (mangled_name
, physname
);
375 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
377 else if (physname
[0] == 't' || physname
[0] == 'Q')
379 /* The physname for template and qualified methods already includes
381 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
387 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
389 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
390 + strlen (buf
) + len
+ strlen (physname
) + 1);
393 mangled_name
= (char *) xmalloc (mangled_name_len
);
395 mangled_name
[0] = '\0';
397 strcpy (mangled_name
, field_name
);
399 strcat (mangled_name
, buf
);
400 /* If the class doesn't have a name, i.e. newname NULL, then we just
401 mangle it using 0 for the length of the class. Thus it gets mangled
402 as something starting with `::' rather than `classname::'. */
404 strcat (mangled_name
, newname
);
406 strcat (mangled_name
, physname
);
407 return (mangled_name
);
411 /* Initialize the language dependent portion of a symbol
412 depending upon the language for the symbol. */
414 symbol_init_language_specific (struct general_symbol_info
*gsymbol
,
415 enum language language
)
417 gsymbol
->language
= language
;
418 if (gsymbol
->language
== language_cplus
419 || gsymbol
->language
== language_java
420 || gsymbol
->language
== language_objc
)
422 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
426 memset (&gsymbol
->language_specific
, 0,
427 sizeof (gsymbol
->language_specific
));
431 /* Functions to initialize a symbol's mangled name. */
433 /* Create the hash table used for demangled names. Each hash entry is
434 a pair of strings; one for the mangled name and one for the demangled
435 name. The entry is hashed via just the mangled name. */
438 create_demangled_names_hash (struct objfile
*objfile
)
440 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
441 The hash table code will round this up to the next prime number.
442 Choosing a much larger table size wastes memory, and saves only about
443 1% in symbol reading. */
445 objfile
->demangled_names_hash
= htab_create_alloc
446 (256, htab_hash_string
, (int (*) (const void *, const void *)) streq
,
447 NULL
, xcalloc
, xfree
);
450 /* Try to determine the demangled name for a symbol, based on the
451 language of that symbol. If the language is set to language_auto,
452 it will attempt to find any demangling algorithm that works and
453 then set the language appropriately. The returned name is allocated
454 by the demangler and should be xfree'd. */
457 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
460 char *demangled
= NULL
;
462 if (gsymbol
->language
== language_unknown
)
463 gsymbol
->language
= language_auto
;
465 if (gsymbol
->language
== language_objc
466 || gsymbol
->language
== language_auto
)
469 objc_demangle (mangled
, 0);
470 if (demangled
!= NULL
)
472 gsymbol
->language
= language_objc
;
476 if (gsymbol
->language
== language_cplus
477 || gsymbol
->language
== language_auto
)
480 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
481 if (demangled
!= NULL
)
483 gsymbol
->language
= language_cplus
;
487 if (gsymbol
->language
== language_java
)
490 cplus_demangle (mangled
,
491 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
492 if (demangled
!= NULL
)
494 gsymbol
->language
= language_java
;
501 /* Set both the mangled and demangled (if any) names for GSYMBOL based
502 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
503 is used, and the memory comes from that objfile's objfile_obstack.
504 LINKAGE_NAME is copied, so the pointer can be discarded after
505 calling this function. */
507 /* We have to be careful when dealing with Java names: when we run
508 into a Java minimal symbol, we don't know it's a Java symbol, so it
509 gets demangled as a C++ name. This is unfortunate, but there's not
510 much we can do about it: but when demangling partial symbols and
511 regular symbols, we'd better not reuse the wrong demangled name.
512 (See PR gdb/1039.) We solve this by putting a distinctive prefix
513 on Java names when storing them in the hash table. */
515 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
516 don't mind the Java prefix so much: different languages have
517 different demangling requirements, so it's only natural that we
518 need to keep language data around in our demangling cache. But
519 it's not good that the minimal symbol has the wrong demangled name.
520 Unfortunately, I can't think of any easy solution to that
523 #define JAVA_PREFIX "##JAVA$$"
524 #define JAVA_PREFIX_LEN 8
527 symbol_set_names (struct general_symbol_info
*gsymbol
,
528 const char *linkage_name
, int len
, struct objfile
*objfile
)
531 /* A 0-terminated copy of the linkage name. */
532 const char *linkage_name_copy
;
533 /* A copy of the linkage name that might have a special Java prefix
534 added to it, for use when looking names up in the hash table. */
535 const char *lookup_name
;
536 /* The length of lookup_name. */
539 if (objfile
->demangled_names_hash
== NULL
)
540 create_demangled_names_hash (objfile
);
542 if (gsymbol
->language
== language_ada
)
544 /* In Ada, we do the symbol lookups using the mangled name, so
545 we can save some space by not storing the demangled name.
547 As a side note, we have also observed some overlap between
548 the C++ mangling and Ada mangling, similarly to what has
549 been observed with Java. Because we don't store the demangled
550 name with the symbol, we don't need to use the same trick
552 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
553 memcpy (gsymbol
->name
, linkage_name
, len
);
554 gsymbol
->name
[len
] = '\0';
555 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
560 /* The stabs reader generally provides names that are not
561 NUL-terminated; most of the other readers don't do this, so we
562 can just use the given copy, unless we're in the Java case. */
563 if (gsymbol
->language
== language_java
)
566 lookup_len
= len
+ JAVA_PREFIX_LEN
;
568 alloc_name
= alloca (lookup_len
+ 1);
569 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
570 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
571 alloc_name
[lookup_len
] = '\0';
573 lookup_name
= alloc_name
;
574 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
576 else if (linkage_name
[len
] != '\0')
581 alloc_name
= alloca (lookup_len
+ 1);
582 memcpy (alloc_name
, linkage_name
, len
);
583 alloc_name
[lookup_len
] = '\0';
585 lookup_name
= alloc_name
;
586 linkage_name_copy
= alloc_name
;
591 lookup_name
= linkage_name
;
592 linkage_name_copy
= linkage_name
;
595 slot
= (char **) htab_find_slot (objfile
->demangled_names_hash
,
596 lookup_name
, INSERT
);
598 /* If this name is not in the hash table, add it. */
601 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
603 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
605 /* If there is a demangled name, place it right after the mangled name.
606 Otherwise, just place a second zero byte after the end of the mangled
608 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
609 lookup_len
+ demangled_len
+ 2);
610 memcpy (*slot
, lookup_name
, lookup_len
+ 1);
611 if (demangled_name
!= NULL
)
613 memcpy (*slot
+ lookup_len
+ 1, demangled_name
, demangled_len
+ 1);
614 xfree (demangled_name
);
617 (*slot
)[lookup_len
+ 1] = '\0';
620 gsymbol
->name
= *slot
+ lookup_len
- len
;
621 if ((*slot
)[lookup_len
+ 1] != '\0')
622 gsymbol
->language_specific
.cplus_specific
.demangled_name
623 = &(*slot
)[lookup_len
+ 1];
625 gsymbol
->language_specific
.cplus_specific
.demangled_name
= NULL
;
628 /* Return the source code name of a symbol. In languages where
629 demangling is necessary, this is the demangled name. */
632 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
634 switch (gsymbol
->language
)
639 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
640 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
643 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
644 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
646 return ada_decode_symbol (gsymbol
);
651 return gsymbol
->name
;
654 /* Return the demangled name for a symbol based on the language for
655 that symbol. If no demangled name exists, return NULL. */
657 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
659 switch (gsymbol
->language
)
664 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
665 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
668 if (gsymbol
->language_specific
.cplus_specific
.demangled_name
!= NULL
)
669 return gsymbol
->language_specific
.cplus_specific
.demangled_name
;
671 return ada_decode_symbol (gsymbol
);
679 /* Return the search name of a symbol---generally the demangled or
680 linkage name of the symbol, depending on how it will be searched for.
681 If there is no distinct demangled name, then returns the same value
682 (same pointer) as SYMBOL_LINKAGE_NAME. */
684 symbol_search_name (const struct general_symbol_info
*gsymbol
)
686 if (gsymbol
->language
== language_ada
)
687 return gsymbol
->name
;
689 return symbol_natural_name (gsymbol
);
692 /* Initialize the structure fields to zero values. */
694 init_sal (struct symtab_and_line
*sal
)
701 sal
->explicit_pc
= 0;
702 sal
->explicit_line
= 0;
706 /* Return 1 if the two sections are the same, or if they could
707 plausibly be copies of each other, one in an original object
708 file and another in a separated debug file. */
711 matching_obj_sections (struct obj_section
*obj_first
,
712 struct obj_section
*obj_second
)
714 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
715 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
718 /* If they're the same section, then they match. */
722 /* If either is NULL, give up. */
723 if (first
== NULL
|| second
== NULL
)
726 /* This doesn't apply to absolute symbols. */
727 if (first
->owner
== NULL
|| second
->owner
== NULL
)
730 /* If they're in the same object file, they must be different sections. */
731 if (first
->owner
== second
->owner
)
734 /* Check whether the two sections are potentially corresponding. They must
735 have the same size, address, and name. We can't compare section indexes,
736 which would be more reliable, because some sections may have been
738 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
741 /* In-memory addresses may start at a different offset, relativize them. */
742 if (bfd_get_section_vma (first
->owner
, first
)
743 - bfd_get_start_address (first
->owner
)
744 != bfd_get_section_vma (second
->owner
, second
)
745 - bfd_get_start_address (second
->owner
))
748 if (bfd_get_section_name (first
->owner
, first
) == NULL
749 || bfd_get_section_name (second
->owner
, second
) == NULL
750 || strcmp (bfd_get_section_name (first
->owner
, first
),
751 bfd_get_section_name (second
->owner
, second
)) != 0)
754 /* Otherwise check that they are in corresponding objfiles. */
757 if (obj
->obfd
== first
->owner
)
759 gdb_assert (obj
!= NULL
);
761 if (obj
->separate_debug_objfile
!= NULL
762 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
764 if (obj
->separate_debug_objfile_backlink
!= NULL
765 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
771 /* Find which partial symtab contains PC and SECTION starting at psymtab PST.
772 We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */
774 static struct partial_symtab
*
775 find_pc_sect_psymtab_closer (CORE_ADDR pc
, struct obj_section
*section
,
776 struct partial_symtab
*pst
,
777 struct minimal_symbol
*msymbol
)
779 struct objfile
*objfile
= pst
->objfile
;
780 struct partial_symtab
*tpst
;
781 struct partial_symtab
*best_pst
= pst
;
782 CORE_ADDR best_addr
= pst
->textlow
;
784 /* An objfile that has its functions reordered might have
785 many partial symbol tables containing the PC, but
786 we want the partial symbol table that contains the
787 function containing the PC. */
788 if (!(objfile
->flags
& OBJF_REORDERED
) &&
789 section
== 0) /* can't validate section this way */
795 /* The code range of partial symtabs sometimes overlap, so, in
796 the loop below, we need to check all partial symtabs and
797 find the one that fits better for the given PC address. We
798 select the partial symtab that contains a symbol whose
799 address is closest to the PC address. By closest we mean
800 that find_pc_sect_symbol returns the symbol with address
801 that is closest and still less than the given PC. */
802 for (tpst
= pst
; tpst
!= NULL
; tpst
= tpst
->next
)
804 if (pc
>= tpst
->textlow
&& pc
< tpst
->texthigh
)
806 struct partial_symbol
*p
;
809 /* NOTE: This assumes that every psymbol has a
810 corresponding msymbol, which is not necessarily
811 true; the debug info might be much richer than the
812 object's symbol table. */
813 p
= find_pc_sect_psymbol (tpst
, pc
, section
);
815 && SYMBOL_VALUE_ADDRESS (p
)
816 == SYMBOL_VALUE_ADDRESS (msymbol
))
819 /* Also accept the textlow value of a psymtab as a
820 "symbol", to provide some support for partial
821 symbol tables with line information but no debug
822 symbols (e.g. those produced by an assembler). */
824 this_addr
= SYMBOL_VALUE_ADDRESS (p
);
826 this_addr
= tpst
->textlow
;
828 /* Check whether it is closer than our current
829 BEST_ADDR. Since this symbol address is
830 necessarily lower or equal to PC, the symbol closer
831 to PC is the symbol which address is the highest.
832 This way we return the psymtab which contains such
833 best match symbol. This can help in cases where the
834 symbol information/debuginfo is not complete, like
835 for instance on IRIX6 with gcc, where no debug info
836 is emitted for statics. (See also the nodebug.exp
838 if (this_addr
> best_addr
)
840 best_addr
= this_addr
;
848 /* Find which partial symtab contains PC and SECTION. Return 0 if
849 none. We return the psymtab that contains a symbol whose address
850 exactly matches PC, or, if we cannot find an exact match, the
851 psymtab that contains a symbol whose address is closest to PC. */
852 struct partial_symtab
*
853 find_pc_sect_psymtab (CORE_ADDR pc
, struct obj_section
*section
)
855 struct objfile
*objfile
;
856 struct minimal_symbol
*msymbol
;
858 /* If we know that this is not a text address, return failure. This is
859 necessary because we loop based on texthigh and textlow, which do
860 not include the data ranges. */
861 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
863 && (MSYMBOL_TYPE (msymbol
) == mst_data
864 || MSYMBOL_TYPE (msymbol
) == mst_bss
865 || MSYMBOL_TYPE (msymbol
) == mst_abs
866 || MSYMBOL_TYPE (msymbol
) == mst_file_data
867 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
870 /* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
871 than the later used TEXTLOW/TEXTHIGH one. */
873 ALL_OBJFILES (objfile
)
874 if (objfile
->psymtabs_addrmap
!= NULL
)
876 struct partial_symtab
*pst
;
878 pst
= addrmap_find (objfile
->psymtabs_addrmap
, pc
);
881 /* FIXME: addrmaps currently do not handle overlayed sections,
882 so fall back to the non-addrmap case if we're debugging
883 overlays and the addrmap returned the wrong section. */
884 if (overlay_debugging
&& msymbol
&& section
)
886 struct partial_symbol
*p
;
887 /* NOTE: This assumes that every psymbol has a
888 corresponding msymbol, which is not necessarily
889 true; the debug info might be much richer than the
890 object's symbol table. */
891 p
= find_pc_sect_psymbol (pst
, pc
, section
);
893 || SYMBOL_VALUE_ADDRESS (p
)
894 != SYMBOL_VALUE_ADDRESS (msymbol
))
898 /* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as
899 PSYMTABS_ADDRMAP we used has already the best 1-byte
900 granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into
901 a worse chosen section due to the TEXTLOW/TEXTHIGH ranges
908 /* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
909 which still have no corresponding full SYMTABs read. But it is not
910 present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB
913 ALL_OBJFILES (objfile
)
915 struct partial_symtab
*pst
;
917 /* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of
918 its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying
919 debug info type in single OBJFILE. */
921 ALL_OBJFILE_PSYMTABS (objfile
, pst
)
922 if (pc
>= pst
->textlow
&& pc
< pst
->texthigh
)
924 struct partial_symtab
*best_pst
;
926 best_pst
= find_pc_sect_psymtab_closer (pc
, section
, pst
,
928 if (best_pst
!= NULL
)
936 /* Find which partial symtab contains PC. Return 0 if none.
937 Backward compatibility, no section */
939 struct partial_symtab
*
940 find_pc_psymtab (CORE_ADDR pc
)
942 return find_pc_sect_psymtab (pc
, find_pc_mapped_section (pc
));
945 /* Find which partial symbol within a psymtab matches PC and SECTION.
946 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
948 struct partial_symbol
*
949 find_pc_sect_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
,
950 struct obj_section
*section
)
952 struct partial_symbol
*best
= NULL
, *p
, **pp
;
956 psymtab
= find_pc_sect_psymtab (pc
, section
);
960 /* Cope with programs that start at address 0 */
961 best_pc
= (psymtab
->textlow
!= 0) ? psymtab
->textlow
- 1 : 0;
963 /* Search the global symbols as well as the static symbols, so that
964 find_pc_partial_function doesn't use a minimal symbol and thus
965 cache a bad endaddr. */
966 for (pp
= psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
;
967 (pp
- (psymtab
->objfile
->global_psymbols
.list
+ psymtab
->globals_offset
)
968 < psymtab
->n_global_syms
);
972 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
973 && SYMBOL_CLASS (p
) == LOC_BLOCK
974 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
975 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
976 || (psymtab
->textlow
== 0
977 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
979 if (section
) /* match on a specific section */
981 fixup_psymbol_section (p
, psymtab
->objfile
);
982 if (!matching_obj_sections (SYMBOL_OBJ_SECTION (p
), section
))
985 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
990 for (pp
= psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
;
991 (pp
- (psymtab
->objfile
->static_psymbols
.list
+ psymtab
->statics_offset
)
992 < psymtab
->n_static_syms
);
996 if (SYMBOL_DOMAIN (p
) == VAR_DOMAIN
997 && SYMBOL_CLASS (p
) == LOC_BLOCK
998 && pc
>= SYMBOL_VALUE_ADDRESS (p
)
999 && (SYMBOL_VALUE_ADDRESS (p
) > best_pc
1000 || (psymtab
->textlow
== 0
1001 && best_pc
== 0 && SYMBOL_VALUE_ADDRESS (p
) == 0)))
1003 if (section
) /* match on a specific section */
1005 fixup_psymbol_section (p
, psymtab
->objfile
);
1006 if (!matching_obj_sections (SYMBOL_OBJ_SECTION (p
), section
))
1009 best_pc
= SYMBOL_VALUE_ADDRESS (p
);
1017 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
1018 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
1020 struct partial_symbol
*
1021 find_pc_psymbol (struct partial_symtab
*psymtab
, CORE_ADDR pc
)
1023 return find_pc_sect_psymbol (psymtab
, pc
, find_pc_mapped_section (pc
));
1026 /* Debug symbols usually don't have section information. We need to dig that
1027 out of the minimal symbols and stash that in the debug symbol. */
1030 fixup_section (struct general_symbol_info
*ginfo
,
1031 CORE_ADDR addr
, struct objfile
*objfile
)
1033 struct minimal_symbol
*msym
;
1035 /* First, check whether a minimal symbol with the same name exists
1036 and points to the same address. The address check is required
1037 e.g. on PowerPC64, where the minimal symbol for a function will
1038 point to the function descriptor, while the debug symbol will
1039 point to the actual function code. */
1040 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1043 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
1044 ginfo
->section
= SYMBOL_SECTION (msym
);
1048 /* Static, function-local variables do appear in the linker
1049 (minimal) symbols, but are frequently given names that won't
1050 be found via lookup_minimal_symbol(). E.g., it has been
1051 observed in frv-uclinux (ELF) executables that a static,
1052 function-local variable named "foo" might appear in the
1053 linker symbols as "foo.6" or "foo.3". Thus, there is no
1054 point in attempting to extend the lookup-by-name mechanism to
1055 handle this case due to the fact that there can be multiple
1058 So, instead, search the section table when lookup by name has
1059 failed. The ``addr'' and ``endaddr'' fields may have already
1060 been relocated. If so, the relocation offset (i.e. the
1061 ANOFFSET value) needs to be subtracted from these values when
1062 performing the comparison. We unconditionally subtract it,
1063 because, when no relocation has been performed, the ANOFFSET
1064 value will simply be zero.
1066 The address of the symbol whose section we're fixing up HAS
1067 NOT BEEN adjusted (relocated) yet. It can't have been since
1068 the section isn't yet known and knowing the section is
1069 necessary in order to add the correct relocation value. In
1070 other words, we wouldn't even be in this function (attempting
1071 to compute the section) if it were already known.
1073 Note that it is possible to search the minimal symbols
1074 (subtracting the relocation value if necessary) to find the
1075 matching minimal symbol, but this is overkill and much less
1076 efficient. It is not necessary to find the matching minimal
1077 symbol, only its section.
1079 Note that this technique (of doing a section table search)
1080 can fail when unrelocated section addresses overlap. For
1081 this reason, we still attempt a lookup by name prior to doing
1082 a search of the section table. */
1084 struct obj_section
*s
;
1085 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1087 int idx
= s
->the_bfd_section
->index
;
1088 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1090 if (obj_section_addr (s
) - offset
<= addr
1091 && addr
< obj_section_endaddr (s
) - offset
)
1093 ginfo
->obj_section
= s
;
1094 ginfo
->section
= idx
;
1102 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1109 if (SYMBOL_OBJ_SECTION (sym
))
1112 /* We either have an OBJFILE, or we can get at it from the sym's
1113 symtab. Anything else is a bug. */
1114 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1116 if (objfile
== NULL
)
1117 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1119 /* We should have an objfile by now. */
1120 gdb_assert (objfile
);
1122 switch (SYMBOL_CLASS (sym
))
1126 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1129 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1133 /* Nothing else will be listed in the minsyms -- no use looking
1138 fixup_section (&sym
->ginfo
, addr
, objfile
);
1143 struct partial_symbol
*
1144 fixup_psymbol_section (struct partial_symbol
*psym
, struct objfile
*objfile
)
1151 if (SYMBOL_OBJ_SECTION (psym
))
1154 gdb_assert (objfile
);
1156 switch (SYMBOL_CLASS (psym
))
1161 addr
= SYMBOL_VALUE_ADDRESS (psym
);
1164 /* Nothing else will be listed in the minsyms -- no use looking
1169 fixup_section (&psym
->ginfo
, addr
, objfile
);
1174 /* Find the definition for a specified symbol name NAME
1175 in domain DOMAIN, visible from lexical block BLOCK.
1176 Returns the struct symbol pointer, or zero if no symbol is found.
1177 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1178 NAME is a field of the current implied argument `this'. If so set
1179 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1180 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1181 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1183 /* This function has a bunch of loops in it and it would seem to be
1184 attractive to put in some QUIT's (though I'm not really sure
1185 whether it can run long enough to be really important). But there
1186 are a few calls for which it would appear to be bad news to quit
1187 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1188 that there is C++ code below which can error(), but that probably
1189 doesn't affect these calls since they are looking for a known
1190 variable and thus can probably assume it will never hit the C++
1194 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1195 const domain_enum domain
, enum language lang
,
1196 int *is_a_field_of_this
)
1198 char *demangled_name
= NULL
;
1199 const char *modified_name
= NULL
;
1200 const char *mangled_name
= NULL
;
1201 struct symbol
*returnval
;
1202 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1204 modified_name
= name
;
1206 /* If we are using C++ or Java, demangle the name before doing a lookup, so
1207 we can always binary search. */
1208 if (lang
== language_cplus
)
1210 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1213 mangled_name
= name
;
1214 modified_name
= demangled_name
;
1215 make_cleanup (xfree
, demangled_name
);
1219 /* If we were given a non-mangled name, canonicalize it
1220 according to the language (so far only for C++). */
1221 demangled_name
= cp_canonicalize_string (name
);
1224 modified_name
= demangled_name
;
1225 make_cleanup (xfree
, demangled_name
);
1229 else if (lang
== language_java
)
1231 demangled_name
= cplus_demangle (name
,
1232 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1235 mangled_name
= name
;
1236 modified_name
= demangled_name
;
1237 make_cleanup (xfree
, demangled_name
);
1241 if (case_sensitivity
== case_sensitive_off
)
1246 len
= strlen (name
);
1247 copy
= (char *) alloca (len
+ 1);
1248 for (i
= 0; i
< len
; i
++)
1249 copy
[i
] = tolower (name
[i
]);
1251 modified_name
= copy
;
1254 returnval
= lookup_symbol_aux (modified_name
, mangled_name
, block
,
1255 domain
, lang
, is_a_field_of_this
);
1256 do_cleanups (cleanup
);
1261 /* Behave like lookup_symbol_in_language, but performed with the
1262 current language. */
1265 lookup_symbol (const char *name
, const struct block
*block
,
1266 domain_enum domain
, int *is_a_field_of_this
)
1268 return lookup_symbol_in_language (name
, block
, domain
,
1269 current_language
->la_language
,
1270 is_a_field_of_this
);
1273 /* Behave like lookup_symbol except that NAME is the natural name
1274 of the symbol that we're looking for and, if LINKAGE_NAME is
1275 non-NULL, ensure that the symbol's linkage name matches as
1278 static struct symbol
*
1279 lookup_symbol_aux (const char *name
, const char *linkage_name
,
1280 const struct block
*block
, const domain_enum domain
,
1281 enum language language
, int *is_a_field_of_this
)
1284 const struct language_defn
*langdef
;
1286 /* Make sure we do something sensible with is_a_field_of_this, since
1287 the callers that set this parameter to some non-null value will
1288 certainly use it later and expect it to be either 0 or 1.
1289 If we don't set it, the contents of is_a_field_of_this are
1291 if (is_a_field_of_this
!= NULL
)
1292 *is_a_field_of_this
= 0;
1294 /* Search specified block and its superiors. Don't search
1295 STATIC_BLOCK or GLOBAL_BLOCK. */
1297 sym
= lookup_symbol_aux_local (name
, linkage_name
, block
, domain
);
1301 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1302 check to see if NAME is a field of `this'. */
1304 langdef
= language_def (language
);
1306 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1309 struct symbol
*sym
= NULL
;
1310 /* 'this' is only defined in the function's block, so find the
1311 enclosing function block. */
1312 for (; block
&& !BLOCK_FUNCTION (block
);
1313 block
= BLOCK_SUPERBLOCK (block
));
1315 if (block
&& !dict_empty (BLOCK_DICT (block
)))
1316 sym
= lookup_block_symbol (block
, langdef
->la_name_of_this
,
1320 struct type
*t
= sym
->type
;
1322 /* I'm not really sure that type of this can ever
1323 be typedefed; just be safe. */
1325 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1326 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1327 t
= TYPE_TARGET_TYPE (t
);
1329 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1330 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1331 error (_("Internal error: `%s' is not an aggregate"),
1332 langdef
->la_name_of_this
);
1334 if (check_field (t
, name
))
1336 *is_a_field_of_this
= 1;
1342 /* Now do whatever is appropriate for LANGUAGE to look
1343 up static and global variables. */
1345 sym
= langdef
->la_lookup_symbol_nonlocal (name
, linkage_name
, block
, domain
);
1349 /* Now search all static file-level symbols. Not strictly correct,
1350 but more useful than an error. Do the symtabs first, then check
1351 the psymtabs. If a psymtab indicates the existence of the
1352 desired name as a file-level static, then do psymtab-to-symtab
1353 conversion on the fly and return the found symbol. */
1355 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1359 sym
= lookup_symbol_aux_psymtabs (STATIC_BLOCK
, name
, linkage_name
, domain
);
1366 /* Check to see if the symbol is defined in BLOCK or its superiors.
1367 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1369 static struct symbol
*
1370 lookup_symbol_aux_local (const char *name
, const char *linkage_name
,
1371 const struct block
*block
,
1372 const domain_enum domain
)
1375 const struct block
*static_block
= block_static_block (block
);
1377 /* Check if either no block is specified or it's a global block. */
1379 if (static_block
== NULL
)
1382 while (block
!= static_block
)
1384 sym
= lookup_symbol_aux_block (name
, linkage_name
, block
, domain
);
1388 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1390 block
= BLOCK_SUPERBLOCK (block
);
1393 /* We've reached the edge of the function without finding a result. */
1398 /* Look up OBJFILE to BLOCK. */
1400 static struct objfile
*
1401 lookup_objfile_from_block (const struct block
*block
)
1403 struct objfile
*obj
;
1409 block
= block_global_block (block
);
1410 /* Go through SYMTABS. */
1411 ALL_SYMTABS (obj
, s
)
1412 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1418 /* Look up a symbol in a block; if found, fixup the symbol, and set
1419 block_found appropriately. */
1422 lookup_symbol_aux_block (const char *name
, const char *linkage_name
,
1423 const struct block
*block
,
1424 const domain_enum domain
)
1428 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1431 block_found
= block
;
1432 return fixup_symbol_section (sym
, NULL
);
1438 /* Check all global symbols in OBJFILE in symtabs and
1442 lookup_global_symbol_from_objfile (const struct objfile
*objfile
,
1444 const char *linkage_name
,
1445 const domain_enum domain
)
1448 struct blockvector
*bv
;
1449 const struct block
*block
;
1451 struct partial_symtab
*ps
;
1453 /* Go through symtabs. */
1454 ALL_OBJFILE_SYMTABS (objfile
, s
)
1456 bv
= BLOCKVECTOR (s
);
1457 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1458 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1461 block_found
= block
;
1462 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1466 /* Now go through psymtabs. */
1467 ALL_OBJFILE_PSYMTABS (objfile
, ps
)
1470 && lookup_partial_symbol (ps
, name
, linkage_name
,
1473 s
= PSYMTAB_TO_SYMTAB (ps
);
1474 bv
= BLOCKVECTOR (s
);
1475 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1476 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1477 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1481 if (objfile
->separate_debug_objfile
)
1482 return lookup_global_symbol_from_objfile (objfile
->separate_debug_objfile
,
1483 name
, linkage_name
, domain
);
1488 /* Check to see if the symbol is defined in one of the symtabs.
1489 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1490 depending on whether or not we want to search global symbols or
1493 static struct symbol
*
1494 lookup_symbol_aux_symtabs (int block_index
,
1495 const char *name
, const char *linkage_name
,
1496 const domain_enum domain
)
1499 struct objfile
*objfile
;
1500 struct blockvector
*bv
;
1501 const struct block
*block
;
1504 ALL_PRIMARY_SYMTABS (objfile
, s
)
1506 bv
= BLOCKVECTOR (s
);
1507 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1508 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1511 block_found
= block
;
1512 return fixup_symbol_section (sym
, objfile
);
1519 /* Check to see if the symbol is defined in one of the partial
1520 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1521 STATIC_BLOCK, depending on whether or not we want to search global
1522 symbols or static symbols. */
1524 static struct symbol
*
1525 lookup_symbol_aux_psymtabs (int block_index
, const char *name
,
1526 const char *linkage_name
,
1527 const domain_enum domain
)
1530 struct objfile
*objfile
;
1531 struct blockvector
*bv
;
1532 const struct block
*block
;
1533 struct partial_symtab
*ps
;
1535 const int psymtab_index
= (block_index
== GLOBAL_BLOCK
? 1 : 0);
1537 ALL_PSYMTABS (objfile
, ps
)
1540 && lookup_partial_symbol (ps
, name
, linkage_name
,
1541 psymtab_index
, domain
))
1543 s
= PSYMTAB_TO_SYMTAB (ps
);
1544 bv
= BLOCKVECTOR (s
);
1545 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1546 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1549 /* This shouldn't be necessary, but as a last resort try
1550 looking in the statics even though the psymtab claimed
1551 the symbol was global, or vice-versa. It's possible
1552 that the psymtab gets it wrong in some cases. */
1554 /* FIXME: carlton/2002-09-30: Should we really do that?
1555 If that happens, isn't it likely to be a GDB error, in
1556 which case we should fix the GDB error rather than
1557 silently dealing with it here? So I'd vote for
1558 removing the check for the symbol in the other
1560 block
= BLOCKVECTOR_BLOCK (bv
,
1561 block_index
== GLOBAL_BLOCK
?
1562 STATIC_BLOCK
: GLOBAL_BLOCK
);
1563 sym
= lookup_block_symbol (block
, name
, linkage_name
, domain
);
1565 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>)."),
1566 block_index
== GLOBAL_BLOCK
? "global" : "static",
1567 name
, ps
->filename
, name
, name
);
1569 return fixup_symbol_section (sym
, objfile
);
1576 /* A default version of lookup_symbol_nonlocal for use by languages
1577 that can't think of anything better to do. This implements the C
1581 basic_lookup_symbol_nonlocal (const char *name
,
1582 const char *linkage_name
,
1583 const struct block
*block
,
1584 const domain_enum domain
)
1588 /* NOTE: carlton/2003-05-19: The comments below were written when
1589 this (or what turned into this) was part of lookup_symbol_aux;
1590 I'm much less worried about these questions now, since these
1591 decisions have turned out well, but I leave these comments here
1594 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1595 not it would be appropriate to search the current global block
1596 here as well. (That's what this code used to do before the
1597 is_a_field_of_this check was moved up.) On the one hand, it's
1598 redundant with the lookup_symbol_aux_symtabs search that happens
1599 next. On the other hand, if decode_line_1 is passed an argument
1600 like filename:var, then the user presumably wants 'var' to be
1601 searched for in filename. On the third hand, there shouldn't be
1602 multiple global variables all of which are named 'var', and it's
1603 not like decode_line_1 has ever restricted its search to only
1604 global variables in a single filename. All in all, only
1605 searching the static block here seems best: it's correct and it's
1608 /* NOTE: carlton/2002-12-05: There's also a possible performance
1609 issue here: if you usually search for global symbols in the
1610 current file, then it would be slightly better to search the
1611 current global block before searching all the symtabs. But there
1612 are other factors that have a much greater effect on performance
1613 than that one, so I don't think we should worry about that for
1616 sym
= lookup_symbol_static (name
, linkage_name
, block
, domain
);
1620 return lookup_symbol_global (name
, linkage_name
, block
, domain
);
1623 /* Lookup a symbol in the static block associated to BLOCK, if there
1624 is one; do nothing if BLOCK is NULL or a global block. */
1627 lookup_symbol_static (const char *name
,
1628 const char *linkage_name
,
1629 const struct block
*block
,
1630 const domain_enum domain
)
1632 const struct block
*static_block
= block_static_block (block
);
1634 if (static_block
!= NULL
)
1635 return lookup_symbol_aux_block (name
, linkage_name
, static_block
, domain
);
1640 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1644 lookup_symbol_global (const char *name
,
1645 const char *linkage_name
,
1646 const struct block
*block
,
1647 const domain_enum domain
)
1649 struct symbol
*sym
= NULL
;
1650 struct objfile
*objfile
= NULL
;
1652 /* Call library-specific lookup procedure. */
1653 objfile
= lookup_objfile_from_block (block
);
1654 if (objfile
!= NULL
)
1655 sym
= solib_global_lookup (objfile
, name
, linkage_name
, domain
);
1659 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1663 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK
, name
, linkage_name
, domain
);
1667 symbol_matches_domain (enum language symbol_language
,
1668 domain_enum symbol_domain
,
1671 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1672 A Java class declaration also defines a typedef for the class.
1673 Similarly, any Ada type declaration implicitly defines a typedef. */
1674 if (symbol_language
== language_cplus
1675 || symbol_language
== language_java
1676 || symbol_language
== language_ada
)
1678 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1679 && symbol_domain
== STRUCT_DOMAIN
)
1682 /* For all other languages, strict match is required. */
1683 return (symbol_domain
== domain
);
1686 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1687 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1688 linkage name matches it. Check the global symbols if GLOBAL, the
1689 static symbols if not */
1691 struct partial_symbol
*
1692 lookup_partial_symbol (struct partial_symtab
*pst
, const char *name
,
1693 const char *linkage_name
, int global
,
1696 struct partial_symbol
*temp
;
1697 struct partial_symbol
**start
, **psym
;
1698 struct partial_symbol
**top
, **real_top
, **bottom
, **center
;
1699 int length
= (global
? pst
->n_global_syms
: pst
->n_static_syms
);
1700 int do_linear_search
= 1;
1707 pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
:
1708 pst
->objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1710 if (global
) /* This means we can use a binary search. */
1712 do_linear_search
= 0;
1714 /* Binary search. This search is guaranteed to end with center
1715 pointing at the earliest partial symbol whose name might be
1716 correct. At that point *all* partial symbols with an
1717 appropriate name will be checked against the correct
1721 top
= start
+ length
- 1;
1723 while (top
> bottom
)
1725 center
= bottom
+ (top
- bottom
) / 2;
1726 if (!(center
< top
))
1727 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1728 if (!do_linear_search
1729 && (SYMBOL_LANGUAGE (*center
) == language_java
))
1731 do_linear_search
= 1;
1733 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center
), name
) >= 0)
1739 bottom
= center
+ 1;
1742 if (!(top
== bottom
))
1743 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
1745 while (top
<= real_top
1746 && (linkage_name
!= NULL
1747 ? strcmp (SYMBOL_LINKAGE_NAME (*top
), linkage_name
) == 0
1748 : SYMBOL_MATCHES_SEARCH_NAME (*top
,name
)))
1750 if (symbol_matches_domain (SYMBOL_LANGUAGE (*top
),
1751 SYMBOL_DOMAIN (*top
), domain
))
1757 /* Can't use a binary search or else we found during the binary search that
1758 we should also do a linear search. */
1760 if (do_linear_search
)
1762 for (psym
= start
; psym
< start
+ length
; psym
++)
1764 if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym
),
1765 SYMBOL_DOMAIN (*psym
), domain
))
1767 if (linkage_name
!= NULL
1768 ? strcmp (SYMBOL_LINKAGE_NAME (*psym
), linkage_name
) == 0
1769 : SYMBOL_MATCHES_SEARCH_NAME (*psym
, name
))
1780 /* Look up a type named NAME in the struct_domain. The type returned
1781 must not be opaque -- i.e., must have at least one field
1785 lookup_transparent_type (const char *name
)
1787 return current_language
->la_lookup_transparent_type (name
);
1790 /* The standard implementation of lookup_transparent_type. This code
1791 was modeled on lookup_symbol -- the parts not relevant to looking
1792 up types were just left out. In particular it's assumed here that
1793 types are available in struct_domain and only at file-static or
1797 basic_lookup_transparent_type (const char *name
)
1800 struct symtab
*s
= NULL
;
1801 struct partial_symtab
*ps
;
1802 struct blockvector
*bv
;
1803 struct objfile
*objfile
;
1804 struct block
*block
;
1806 /* Now search all the global symbols. Do the symtab's first, then
1807 check the psymtab's. If a psymtab indicates the existence
1808 of the desired name as a global, then do psymtab-to-symtab
1809 conversion on the fly and return the found symbol. */
1811 ALL_PRIMARY_SYMTABS (objfile
, s
)
1813 bv
= BLOCKVECTOR (s
);
1814 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1815 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1816 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1818 return SYMBOL_TYPE (sym
);
1822 ALL_PSYMTABS (objfile
, ps
)
1824 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
,
1827 s
= PSYMTAB_TO_SYMTAB (ps
);
1828 bv
= BLOCKVECTOR (s
);
1829 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1830 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1833 /* This shouldn't be necessary, but as a last resort
1834 * try looking in the statics even though the psymtab
1835 * claimed the symbol was global. It's possible that
1836 * the psymtab gets it wrong in some cases.
1838 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1839 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1841 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1842 %s may be an inlined function, or may be a template function\n\
1843 (if a template, try specifying an instantiation: %s<type>)."),
1844 name
, ps
->filename
, name
, name
);
1846 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1847 return SYMBOL_TYPE (sym
);
1851 /* Now search the static file-level symbols.
1852 Not strictly correct, but more useful than an error.
1853 Do the symtab's first, then
1854 check the psymtab's. If a psymtab indicates the existence
1855 of the desired name as a file-level static, then do psymtab-to-symtab
1856 conversion on the fly and return the found symbol.
1859 ALL_PRIMARY_SYMTABS (objfile
, s
)
1861 bv
= BLOCKVECTOR (s
);
1862 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1863 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1864 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1866 return SYMBOL_TYPE (sym
);
1870 ALL_PSYMTABS (objfile
, ps
)
1872 if (!ps
->readin
&& lookup_partial_symbol (ps
, name
, NULL
, 0, STRUCT_DOMAIN
))
1874 s
= PSYMTAB_TO_SYMTAB (ps
);
1875 bv
= BLOCKVECTOR (s
);
1876 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1877 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1880 /* This shouldn't be necessary, but as a last resort
1881 * try looking in the globals even though the psymtab
1882 * claimed the symbol was static. It's possible that
1883 * the psymtab gets it wrong in some cases.
1885 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1886 sym
= lookup_block_symbol (block
, name
, NULL
, STRUCT_DOMAIN
);
1888 error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1889 %s may be an inlined function, or may be a template function\n\
1890 (if a template, try specifying an instantiation: %s<type>)."),
1891 name
, ps
->filename
, name
, name
);
1893 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1894 return SYMBOL_TYPE (sym
);
1897 return (struct type
*) 0;
1901 /* Find the psymtab containing main(). */
1902 /* FIXME: What about languages without main() or specially linked
1903 executables that have no main() ? */
1905 struct partial_symtab
*
1906 find_main_psymtab (void)
1908 struct partial_symtab
*pst
;
1909 struct objfile
*objfile
;
1911 ALL_PSYMTABS (objfile
, pst
)
1913 if (lookup_partial_symbol (pst
, main_name (), NULL
, 1, VAR_DOMAIN
))
1921 /* Search BLOCK for symbol NAME in DOMAIN.
1923 Note that if NAME is the demangled form of a C++ symbol, we will fail
1924 to find a match during the binary search of the non-encoded names, but
1925 for now we don't worry about the slight inefficiency of looking for
1926 a match we'll never find, since it will go pretty quick. Once the
1927 binary search terminates, we drop through and do a straight linear
1928 search on the symbols. Each symbol which is marked as being a ObjC/C++
1929 symbol (language_cplus or language_objc set) has both the encoded and
1930 non-encoded names tested for a match.
1932 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1933 particular mangled name.
1937 lookup_block_symbol (const struct block
*block
, const char *name
,
1938 const char *linkage_name
,
1939 const domain_enum domain
)
1941 struct dict_iterator iter
;
1944 if (!BLOCK_FUNCTION (block
))
1946 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1948 sym
= dict_iter_name_next (name
, &iter
))
1950 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1951 SYMBOL_DOMAIN (sym
), domain
)
1952 && (linkage_name
!= NULL
1953 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1960 /* Note that parameter symbols do not always show up last in the
1961 list; this loop makes sure to take anything else other than
1962 parameter symbols first; it only uses parameter symbols as a
1963 last resort. Note that this only takes up extra computation
1966 struct symbol
*sym_found
= NULL
;
1968 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1970 sym
= dict_iter_name_next (name
, &iter
))
1972 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1973 SYMBOL_DOMAIN (sym
), domain
)
1974 && (linkage_name
!= NULL
1975 ? strcmp (SYMBOL_LINKAGE_NAME (sym
), linkage_name
) == 0 : 1))
1978 if (!SYMBOL_IS_ARGUMENT (sym
))
1984 return (sym_found
); /* Will be NULL if not found. */
1988 /* Find the symtab associated with PC and SECTION. Look through the
1989 psymtabs and read in another symtab if necessary. */
1992 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
1995 struct blockvector
*bv
;
1996 struct symtab
*s
= NULL
;
1997 struct symtab
*best_s
= NULL
;
1998 struct partial_symtab
*ps
;
1999 struct objfile
*objfile
;
2000 CORE_ADDR distance
= 0;
2001 struct minimal_symbol
*msymbol
;
2003 /* If we know that this is not a text address, return failure. This is
2004 necessary because we loop based on the block's high and low code
2005 addresses, which do not include the data ranges, and because
2006 we call find_pc_sect_psymtab which has a similar restriction based
2007 on the partial_symtab's texthigh and textlow. */
2008 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2010 && (MSYMBOL_TYPE (msymbol
) == mst_data
2011 || MSYMBOL_TYPE (msymbol
) == mst_bss
2012 || MSYMBOL_TYPE (msymbol
) == mst_abs
2013 || MSYMBOL_TYPE (msymbol
) == mst_file_data
2014 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
2017 /* Search all symtabs for the one whose file contains our address, and which
2018 is the smallest of all the ones containing the address. This is designed
2019 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2020 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2021 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2023 This happens for native ecoff format, where code from included files
2024 gets its own symtab. The symtab for the included file should have
2025 been read in already via the dependency mechanism.
2026 It might be swifter to create several symtabs with the same name
2027 like xcoff does (I'm not sure).
2029 It also happens for objfiles that have their functions reordered.
2030 For these, the symtab we are looking for is not necessarily read in. */
2032 ALL_PRIMARY_SYMTABS (objfile
, s
)
2034 bv
= BLOCKVECTOR (s
);
2035 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2037 if (BLOCK_START (b
) <= pc
2038 && BLOCK_END (b
) > pc
2040 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2042 /* For an objfile that has its functions reordered,
2043 find_pc_psymtab will find the proper partial symbol table
2044 and we simply return its corresponding symtab. */
2045 /* In order to better support objfiles that contain both
2046 stabs and coff debugging info, we continue on if a psymtab
2048 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->psymtabs
)
2050 ps
= find_pc_sect_psymtab (pc
, section
);
2052 return PSYMTAB_TO_SYMTAB (ps
);
2056 struct dict_iterator iter
;
2057 struct symbol
*sym
= NULL
;
2059 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2061 fixup_symbol_section (sym
, objfile
);
2062 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
2066 continue; /* no symbol in this symtab matches section */
2068 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2077 ps
= find_pc_sect_psymtab (pc
, section
);
2081 /* Might want to error() here (in case symtab is corrupt and
2082 will cause a core dump), but maybe we can successfully
2083 continue, so let's not. */
2085 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n"),
2087 s
= PSYMTAB_TO_SYMTAB (ps
);
2092 /* Find the symtab associated with PC. Look through the psymtabs and
2093 read in another symtab if necessary. Backward compatibility, no section */
2096 find_pc_symtab (CORE_ADDR pc
)
2098 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2102 /* Find the source file and line number for a given PC value and SECTION.
2103 Return a structure containing a symtab pointer, a line number,
2104 and a pc range for the entire source line.
2105 The value's .pc field is NOT the specified pc.
2106 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2107 use the line that ends there. Otherwise, in that case, the line
2108 that begins there is used. */
2110 /* The big complication here is that a line may start in one file, and end just
2111 before the start of another file. This usually occurs when you #include
2112 code in the middle of a subroutine. To properly find the end of a line's PC
2113 range, we must search all symtabs associated with this compilation unit, and
2114 find the one whose first PC is closer than that of the next line in this
2117 /* If it's worth the effort, we could be using a binary search. */
2119 struct symtab_and_line
2120 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2123 struct linetable
*l
;
2126 struct linetable_entry
*item
;
2127 struct symtab_and_line val
;
2128 struct blockvector
*bv
;
2129 struct minimal_symbol
*msymbol
;
2130 struct minimal_symbol
*mfunsym
;
2132 /* Info on best line seen so far, and where it starts, and its file. */
2134 struct linetable_entry
*best
= NULL
;
2135 CORE_ADDR best_end
= 0;
2136 struct symtab
*best_symtab
= 0;
2138 /* Store here the first line number
2139 of a file which contains the line at the smallest pc after PC.
2140 If we don't find a line whose range contains PC,
2141 we will use a line one less than this,
2142 with a range from the start of that file to the first line's pc. */
2143 struct linetable_entry
*alt
= NULL
;
2144 struct symtab
*alt_symtab
= 0;
2146 /* Info on best line seen in this file. */
2148 struct linetable_entry
*prev
;
2150 /* If this pc is not from the current frame,
2151 it is the address of the end of a call instruction.
2152 Quite likely that is the start of the following statement.
2153 But what we want is the statement containing the instruction.
2154 Fudge the pc to make sure we get that. */
2156 init_sal (&val
); /* initialize to zeroes */
2158 /* It's tempting to assume that, if we can't find debugging info for
2159 any function enclosing PC, that we shouldn't search for line
2160 number info, either. However, GAS can emit line number info for
2161 assembly files --- very helpful when debugging hand-written
2162 assembly code. In such a case, we'd have no debug info for the
2163 function, but we would have line info. */
2168 /* elz: added this because this function returned the wrong
2169 information if the pc belongs to a stub (import/export)
2170 to call a shlib function. This stub would be anywhere between
2171 two functions in the target, and the line info was erroneously
2172 taken to be the one of the line before the pc.
2174 /* RT: Further explanation:
2176 * We have stubs (trampolines) inserted between procedures.
2178 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2179 * exists in the main image.
2181 * In the minimal symbol table, we have a bunch of symbols
2182 * sorted by start address. The stubs are marked as "trampoline",
2183 * the others appear as text. E.g.:
2185 * Minimal symbol table for main image
2186 * main: code for main (text symbol)
2187 * shr1: stub (trampoline symbol)
2188 * foo: code for foo (text symbol)
2190 * Minimal symbol table for "shr1" image:
2192 * shr1: code for shr1 (text symbol)
2195 * So the code below is trying to detect if we are in the stub
2196 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2197 * and if found, do the symbolization from the real-code address
2198 * rather than the stub address.
2200 * Assumptions being made about the minimal symbol table:
2201 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2202 * if we're really in the trampoline. If we're beyond it (say
2203 * we're in "foo" in the above example), it'll have a closer
2204 * symbol (the "foo" text symbol for example) and will not
2205 * return the trampoline.
2206 * 2. lookup_minimal_symbol_text() will find a real text symbol
2207 * corresponding to the trampoline, and whose address will
2208 * be different than the trampoline address. I put in a sanity
2209 * check for the address being the same, to avoid an
2210 * infinite recursion.
2212 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2213 if (msymbol
!= NULL
)
2214 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2216 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2218 if (mfunsym
== NULL
)
2219 /* I eliminated this warning since it is coming out
2220 * in the following situation:
2221 * gdb shmain // test program with shared libraries
2222 * (gdb) break shr1 // function in shared lib
2223 * Warning: In stub for ...
2224 * In the above situation, the shared lib is not loaded yet,
2225 * so of course we can't find the real func/line info,
2226 * but the "break" still works, and the warning is annoying.
2227 * So I commented out the warning. RT */
2228 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2230 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
2231 /* Avoid infinite recursion */
2232 /* See above comment about why warning is commented out */
2233 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2236 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2240 s
= find_pc_sect_symtab (pc
, section
);
2243 /* if no symbol information, return previous pc */
2250 bv
= BLOCKVECTOR (s
);
2252 /* Look at all the symtabs that share this blockvector.
2253 They all have the same apriori range, that we found was right;
2254 but they have different line tables. */
2256 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2258 /* Find the best line in this symtab. */
2265 /* I think len can be zero if the symtab lacks line numbers
2266 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2267 I'm not sure which, and maybe it depends on the symbol
2273 item
= l
->item
; /* Get first line info */
2275 /* Is this file's first line closer than the first lines of other files?
2276 If so, record this file, and its first line, as best alternate. */
2277 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2283 for (i
= 0; i
< len
; i
++, item
++)
2285 /* Leave prev pointing to the linetable entry for the last line
2286 that started at or before PC. */
2293 /* At this point, prev points at the line whose start addr is <= pc, and
2294 item points at the next line. If we ran off the end of the linetable
2295 (pc >= start of the last line), then prev == item. If pc < start of
2296 the first line, prev will not be set. */
2298 /* Is this file's best line closer than the best in the other files?
2299 If so, record this file, and its best line, as best so far. Don't
2300 save prev if it represents the end of a function (i.e. line number
2301 0) instead of a real line. */
2303 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2308 /* Discard BEST_END if it's before the PC of the current BEST. */
2309 if (best_end
<= best
->pc
)
2313 /* If another line (denoted by ITEM) is in the linetable and its
2314 PC is after BEST's PC, but before the current BEST_END, then
2315 use ITEM's PC as the new best_end. */
2316 if (best
&& i
< len
&& item
->pc
> best
->pc
2317 && (best_end
== 0 || best_end
> item
->pc
))
2318 best_end
= item
->pc
;
2323 /* If we didn't find any line number info, just return zeros.
2324 We used to return alt->line - 1 here, but that could be
2325 anywhere; if we don't have line number info for this PC,
2326 don't make some up. */
2329 else if (best
->line
== 0)
2331 /* If our best fit is in a range of PC's for which no line
2332 number info is available (line number is zero) then we didn't
2333 find any valid line information. */
2338 val
.symtab
= best_symtab
;
2339 val
.line
= best
->line
;
2341 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2346 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2348 val
.section
= section
;
2352 /* Backward compatibility (no section) */
2354 struct symtab_and_line
2355 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2357 struct obj_section
*section
;
2359 section
= find_pc_overlay (pc
);
2360 if (pc_in_unmapped_range (pc
, section
))
2361 pc
= overlay_mapped_address (pc
, section
);
2362 return find_pc_sect_line (pc
, section
, notcurrent
);
2365 /* Find line number LINE in any symtab whose name is the same as
2368 If found, return the symtab that contains the linetable in which it was
2369 found, set *INDEX to the index in the linetable of the best entry
2370 found, and set *EXACT_MATCH nonzero if the value returned is an
2373 If not found, return NULL. */
2376 find_line_symtab (struct symtab
*symtab
, int line
, int *index
, int *exact_match
)
2378 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2380 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2384 struct linetable
*best_linetable
;
2385 struct symtab
*best_symtab
;
2387 /* First try looking it up in the given symtab. */
2388 best_linetable
= LINETABLE (symtab
);
2389 best_symtab
= symtab
;
2390 best_index
= find_line_common (best_linetable
, line
, &exact
);
2391 if (best_index
< 0 || !exact
)
2393 /* Didn't find an exact match. So we better keep looking for
2394 another symtab with the same name. In the case of xcoff,
2395 multiple csects for one source file (produced by IBM's FORTRAN
2396 compiler) produce multiple symtabs (this is unavoidable
2397 assuming csects can be at arbitrary places in memory and that
2398 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2400 /* BEST is the smallest linenumber > LINE so far seen,
2401 or 0 if none has been seen so far.
2402 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2405 struct objfile
*objfile
;
2407 struct partial_symtab
*p
;
2409 if (best_index
>= 0)
2410 best
= best_linetable
->item
[best_index
].line
;
2414 ALL_PSYMTABS (objfile
, p
)
2416 if (strcmp (symtab
->filename
, p
->filename
) != 0)
2418 PSYMTAB_TO_SYMTAB (p
);
2421 ALL_SYMTABS (objfile
, s
)
2423 struct linetable
*l
;
2426 if (strcmp (symtab
->filename
, s
->filename
) != 0)
2429 ind
= find_line_common (l
, line
, &exact
);
2439 if (best
== 0 || l
->item
[ind
].line
< best
)
2441 best
= l
->item
[ind
].line
;
2454 *index
= best_index
;
2456 *exact_match
= exact
;
2461 /* Set the PC value for a given source file and line number and return true.
2462 Returns zero for invalid line number (and sets the PC to 0).
2463 The source file is specified with a struct symtab. */
2466 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2468 struct linetable
*l
;
2475 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2478 l
= LINETABLE (symtab
);
2479 *pc
= l
->item
[ind
].pc
;
2486 /* Find the range of pc values in a line.
2487 Store the starting pc of the line into *STARTPTR
2488 and the ending pc (start of next line) into *ENDPTR.
2489 Returns 1 to indicate success.
2490 Returns 0 if could not find the specified line. */
2493 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2496 CORE_ADDR startaddr
;
2497 struct symtab_and_line found_sal
;
2500 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2503 /* This whole function is based on address. For example, if line 10 has
2504 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2505 "info line *0x123" should say the line goes from 0x100 to 0x200
2506 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2507 This also insures that we never give a range like "starts at 0x134
2508 and ends at 0x12c". */
2510 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2511 if (found_sal
.line
!= sal
.line
)
2513 /* The specified line (sal) has zero bytes. */
2514 *startptr
= found_sal
.pc
;
2515 *endptr
= found_sal
.pc
;
2519 *startptr
= found_sal
.pc
;
2520 *endptr
= found_sal
.end
;
2525 /* Given a line table and a line number, return the index into the line
2526 table for the pc of the nearest line whose number is >= the specified one.
2527 Return -1 if none is found. The value is >= 0 if it is an index.
2529 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2532 find_line_common (struct linetable
*l
, int lineno
,
2538 /* BEST is the smallest linenumber > LINENO so far seen,
2539 or 0 if none has been seen so far.
2540 BEST_INDEX identifies the item for it. */
2542 int best_index
= -1;
2553 for (i
= 0; i
< len
; i
++)
2555 struct linetable_entry
*item
= &(l
->item
[i
]);
2557 if (item
->line
== lineno
)
2559 /* Return the first (lowest address) entry which matches. */
2564 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2571 /* If we got here, we didn't get an exact match. */
2576 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2578 struct symtab_and_line sal
;
2579 sal
= find_pc_line (pc
, 0);
2582 return sal
.symtab
!= 0;
2585 /* Given a function start address PC and SECTION, find the first
2586 address after the function prologue. */
2588 find_function_start_pc (struct gdbarch
*gdbarch
,
2589 CORE_ADDR pc
, struct obj_section
*section
)
2591 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2592 so that gdbarch_skip_prologue has something unique to work on. */
2593 if (section_is_overlay (section
) && !section_is_mapped (section
))
2594 pc
= overlay_unmapped_address (pc
, section
);
2596 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2597 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2599 /* For overlays, map pc back into its mapped VMA range. */
2600 pc
= overlay_mapped_address (pc
, section
);
2605 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2606 address for that function that has an entry in SYMTAB's line info
2607 table. If such an entry cannot be found, return FUNC_ADDR
2610 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2612 CORE_ADDR func_start
, func_end
;
2613 struct linetable
*l
;
2615 int best_lineno
= 0;
2616 CORE_ADDR best_pc
= func_addr
;
2618 /* Give up if this symbol has no lineinfo table. */
2619 l
= LINETABLE (symtab
);
2623 /* Get the range for the function's PC values, or give up if we
2624 cannot, for some reason. */
2625 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2628 /* Linetable entries are ordered by PC values, see the commentary in
2629 symtab.h where `struct linetable' is defined. Thus, the first
2630 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2631 address we are looking for. */
2632 for (i
= 0; i
< l
->nitems
; i
++)
2634 struct linetable_entry
*item
= &(l
->item
[i
]);
2636 /* Don't use line numbers of zero, they mark special entries in
2637 the table. See the commentary on symtab.h before the
2638 definition of struct linetable. */
2639 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2646 /* Given a function symbol SYM, find the symtab and line for the start
2648 If the argument FUNFIRSTLINE is nonzero, we want the first line
2649 of real code inside the function. */
2651 struct symtab_and_line
2652 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2654 struct block
*block
= SYMBOL_BLOCK_VALUE (sym
);
2655 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2656 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2659 struct symtab_and_line sal
;
2660 struct block
*b
, *function_block
;
2662 pc
= BLOCK_START (block
);
2663 fixup_symbol_section (sym
, objfile
);
2666 /* Skip "first line" of function (which is actually its prologue). */
2667 pc
= find_function_start_pc (gdbarch
, pc
, SYMBOL_OBJ_SECTION (sym
));
2669 sal
= find_pc_sect_line (pc
, SYMBOL_OBJ_SECTION (sym
), 0);
2671 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2672 line is still part of the same function. */
2674 && BLOCK_START (block
) <= sal
.end
2675 && sal
.end
< BLOCK_END (block
))
2677 /* First pc of next line */
2679 /* Recalculate the line number (might not be N+1). */
2680 sal
= find_pc_sect_line (pc
, SYMBOL_OBJ_SECTION (sym
), 0);
2683 /* On targets with executable formats that don't have a concept of
2684 constructors (ELF with .init has, PE doesn't), gcc emits a call
2685 to `__main' in `main' between the prologue and before user
2688 && gdbarch_skip_main_prologue_p (gdbarch
)
2689 && SYMBOL_LINKAGE_NAME (sym
)
2690 && strcmp (SYMBOL_LINKAGE_NAME (sym
), "main") == 0)
2692 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2693 /* Recalculate the line number (might not be N+1). */
2694 sal
= find_pc_sect_line (pc
, SYMBOL_OBJ_SECTION (sym
), 0);
2697 /* If we still don't have a valid source line, try to find the first
2698 PC in the lineinfo table that belongs to the same function. This
2699 happens with COFF debug info, which does not seem to have an
2700 entry in lineinfo table for the code after the prologue which has
2701 no direct relation to source. For example, this was found to be
2702 the case with the DJGPP target using "gcc -gcoff" when the
2703 compiler inserted code after the prologue to make sure the stack
2705 if (funfirstline
&& sal
.symtab
== NULL
)
2707 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2708 /* Recalculate the line number. */
2709 sal
= find_pc_sect_line (pc
, SYMBOL_OBJ_SECTION (sym
), 0);
2714 /* Check if we are now inside an inlined function. If we can,
2715 use the call site of the function instead. */
2716 b
= block_for_pc_sect (sal
.pc
, SYMBOL_OBJ_SECTION (sym
));
2717 function_block
= NULL
;
2720 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2722 else if (BLOCK_FUNCTION (b
) != NULL
)
2724 b
= BLOCK_SUPERBLOCK (b
);
2726 if (function_block
!= NULL
2727 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2729 sal
.line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2730 sal
.symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2736 /* If P is of the form "operator[ \t]+..." where `...' is
2737 some legitimate operator text, return a pointer to the
2738 beginning of the substring of the operator text.
2739 Otherwise, return "". */
2741 operator_chars (char *p
, char **end
)
2744 if (strncmp (p
, "operator", 8))
2748 /* Don't get faked out by `operator' being part of a longer
2750 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2753 /* Allow some whitespace between `operator' and the operator symbol. */
2754 while (*p
== ' ' || *p
== '\t')
2757 /* Recognize 'operator TYPENAME'. */
2759 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2762 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2771 case '\\': /* regexp quoting */
2774 if (p
[2] == '=') /* 'operator\*=' */
2776 else /* 'operator\*' */
2780 else if (p
[1] == '[')
2783 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2784 else if (p
[2] == '\\' && p
[3] == ']')
2786 *end
= p
+ 4; /* 'operator\[\]' */
2790 error (_("nothing is allowed between '[' and ']'"));
2794 /* Gratuitous qoute: skip it and move on. */
2816 if (p
[0] == '-' && p
[1] == '>')
2818 /* Struct pointer member operator 'operator->'. */
2821 *end
= p
+ 3; /* 'operator->*' */
2824 else if (p
[2] == '\\')
2826 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2831 *end
= p
+ 2; /* 'operator->' */
2835 if (p
[1] == '=' || p
[1] == p
[0])
2846 error (_("`operator ()' must be specified without whitespace in `()'"));
2851 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2856 error (_("`operator []' must be specified without whitespace in `[]'"));
2860 error (_("`operator %s' not supported"), p
);
2869 /* If FILE is not already in the table of files, return zero;
2870 otherwise return non-zero. Optionally add FILE to the table if ADD
2871 is non-zero. If *FIRST is non-zero, forget the old table
2874 filename_seen (const char *file
, int add
, int *first
)
2876 /* Table of files seen so far. */
2877 static const char **tab
= NULL
;
2878 /* Allocated size of tab in elements.
2879 Start with one 256-byte block (when using GNU malloc.c).
2880 24 is the malloc overhead when range checking is in effect. */
2881 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2882 /* Current size of tab in elements. */
2883 static int tab_cur_size
;
2889 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2893 /* Is FILE in tab? */
2894 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2895 if (strcmp (*p
, file
) == 0)
2898 /* No; maybe add it to tab. */
2901 if (tab_cur_size
== tab_alloc_size
)
2903 tab_alloc_size
*= 2;
2904 tab
= (const char **) xrealloc ((char *) tab
,
2905 tab_alloc_size
* sizeof (*tab
));
2907 tab
[tab_cur_size
++] = file
;
2913 /* Slave routine for sources_info. Force line breaks at ,'s.
2914 NAME is the name to print and *FIRST is nonzero if this is the first
2915 name printed. Set *FIRST to zero. */
2917 output_source_filename (const char *name
, int *first
)
2919 /* Since a single source file can result in several partial symbol
2920 tables, we need to avoid printing it more than once. Note: if
2921 some of the psymtabs are read in and some are not, it gets
2922 printed both under "Source files for which symbols have been
2923 read" and "Source files for which symbols will be read in on
2924 demand". I consider this a reasonable way to deal with the
2925 situation. I'm not sure whether this can also happen for
2926 symtabs; it doesn't hurt to check. */
2928 /* Was NAME already seen? */
2929 if (filename_seen (name
, 1, first
))
2931 /* Yes; don't print it again. */
2934 /* No; print it and reset *FIRST. */
2941 printf_filtered (", ");
2945 fputs_filtered (name
, gdb_stdout
);
2949 sources_info (char *ignore
, int from_tty
)
2952 struct partial_symtab
*ps
;
2953 struct objfile
*objfile
;
2956 if (!have_full_symbols () && !have_partial_symbols ())
2958 error (_("No symbol table is loaded. Use the \"file\" command."));
2961 printf_filtered ("Source files for which symbols have been read in:\n\n");
2964 ALL_SYMTABS (objfile
, s
)
2966 const char *fullname
= symtab_to_fullname (s
);
2967 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2969 printf_filtered ("\n\n");
2971 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2974 ALL_PSYMTABS (objfile
, ps
)
2978 const char *fullname
= psymtab_to_fullname (ps
);
2979 output_source_filename (fullname
? fullname
: ps
->filename
, &first
);
2982 printf_filtered ("\n");
2986 file_matches (char *file
, char *files
[], int nfiles
)
2990 if (file
!= NULL
&& nfiles
!= 0)
2992 for (i
= 0; i
< nfiles
; i
++)
2994 if (strcmp (files
[i
], lbasename (file
)) == 0)
2998 else if (nfiles
== 0)
3003 /* Free any memory associated with a search. */
3005 free_search_symbols (struct symbol_search
*symbols
)
3007 struct symbol_search
*p
;
3008 struct symbol_search
*next
;
3010 for (p
= symbols
; p
!= NULL
; p
= next
)
3018 do_free_search_symbols_cleanup (void *symbols
)
3020 free_search_symbols (symbols
);
3024 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
3026 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
3029 /* Helper function for sort_search_symbols and qsort. Can only
3030 sort symbols, not minimal symbols. */
3032 compare_search_syms (const void *sa
, const void *sb
)
3034 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
3035 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
3037 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
3038 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3041 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3042 prevtail where it is, but update its next pointer to point to
3043 the first of the sorted symbols. */
3044 static struct symbol_search
*
3045 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3047 struct symbol_search
**symbols
, *symp
, *old_next
;
3050 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3052 symp
= prevtail
->next
;
3053 for (i
= 0; i
< nfound
; i
++)
3058 /* Generally NULL. */
3061 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3062 compare_search_syms
);
3065 for (i
= 0; i
< nfound
; i
++)
3067 symp
->next
= symbols
[i
];
3070 symp
->next
= old_next
;
3076 /* Search the symbol table for matches to the regular expression REGEXP,
3077 returning the results in *MATCHES.
3079 Only symbols of KIND are searched:
3080 FUNCTIONS_DOMAIN - search all functions
3081 TYPES_DOMAIN - search all type names
3082 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3083 and constants (enums)
3085 free_search_symbols should be called when *MATCHES is no longer needed.
3087 The results are sorted locally; each symtab's global and static blocks are
3088 separately alphabetized.
3091 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
3092 struct symbol_search
**matches
)
3095 struct partial_symtab
*ps
;
3096 struct blockvector
*bv
;
3099 struct dict_iterator iter
;
3101 struct partial_symbol
**psym
;
3102 struct objfile
*objfile
;
3103 struct minimal_symbol
*msymbol
;
3106 static enum minimal_symbol_type types
[]
3108 {mst_data
, mst_text
, mst_abs
, mst_unknown
};
3109 static enum minimal_symbol_type types2
[]
3111 {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
3112 static enum minimal_symbol_type types3
[]
3114 {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
3115 static enum minimal_symbol_type types4
[]
3117 {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
3118 enum minimal_symbol_type ourtype
;
3119 enum minimal_symbol_type ourtype2
;
3120 enum minimal_symbol_type ourtype3
;
3121 enum minimal_symbol_type ourtype4
;
3122 struct symbol_search
*sr
;
3123 struct symbol_search
*psr
;
3124 struct symbol_search
*tail
;
3125 struct cleanup
*old_chain
= NULL
;
3127 if (kind
< VARIABLES_DOMAIN
)
3128 error (_("must search on specific domain"));
3130 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3131 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3132 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3133 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3135 sr
= *matches
= NULL
;
3140 /* Make sure spacing is right for C++ operators.
3141 This is just a courtesy to make the matching less sensitive
3142 to how many spaces the user leaves between 'operator'
3143 and <TYPENAME> or <OPERATOR>. */
3145 char *opname
= operator_chars (regexp
, &opend
);
3148 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
3149 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3151 /* There should 1 space between 'operator' and 'TYPENAME'. */
3152 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3157 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3158 if (opname
[-1] == ' ')
3161 /* If wrong number of spaces, fix it. */
3164 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3165 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3170 if (0 != (val
= re_comp (regexp
)))
3171 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3174 /* Search through the partial symtabs *first* for all symbols
3175 matching the regexp. That way we don't have to reproduce all of
3176 the machinery below. */
3178 ALL_PSYMTABS (objfile
, ps
)
3180 struct partial_symbol
**bound
, **gbound
, **sbound
;
3186 gbound
= objfile
->global_psymbols
.list
+ ps
->globals_offset
+ ps
->n_global_syms
;
3187 sbound
= objfile
->static_psymbols
.list
+ ps
->statics_offset
+ ps
->n_static_syms
;
3190 /* Go through all of the symbols stored in a partial
3191 symtab in one loop. */
3192 psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3197 if (bound
== gbound
&& ps
->n_static_syms
!= 0)
3199 psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3210 /* If it would match (logic taken from loop below)
3211 load the file and go on to the next one. We check the
3212 filename here, but that's a bit bogus: we don't know
3213 what file it really comes from until we have full
3214 symtabs. The symbol might be in a header file included by
3215 this psymtab. This only affects Insight. */
3216 if (file_matches (ps
->filename
, files
, nfiles
)
3218 || re_exec (SYMBOL_NATURAL_NAME (*psym
)) != 0)
3219 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (*psym
) != LOC_TYPEDEF
3220 && SYMBOL_CLASS (*psym
) != LOC_BLOCK
)
3221 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_BLOCK
)
3222 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (*psym
) == LOC_TYPEDEF
))))
3224 PSYMTAB_TO_SYMTAB (ps
);
3232 /* Here, we search through the minimal symbol tables for functions
3233 and variables that match, and force their symbols to be read.
3234 This is in particular necessary for demangled variable names,
3235 which are no longer put into the partial symbol tables.
3236 The symbol will then be found during the scan of symtabs below.
3238 For functions, find_pc_symtab should succeed if we have debug info
3239 for the function, for variables we have to call lookup_symbol
3240 to determine if the variable has debug info.
3241 If the lookup fails, set found_misc so that we will rescan to print
3242 any matching symbols without debug info.
3245 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3247 ALL_MSYMBOLS (objfile
, msymbol
)
3249 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3250 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3251 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3252 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3255 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3257 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3259 /* FIXME: carlton/2003-02-04: Given that the
3260 semantics of lookup_symbol keeps on changing
3261 slightly, it would be a nice idea if we had a
3262 function lookup_symbol_minsym that found the
3263 symbol associated to a given minimal symbol (if
3265 if (kind
== FUNCTIONS_DOMAIN
3266 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3267 (struct block
*) NULL
,
3277 ALL_PRIMARY_SYMTABS (objfile
, s
)
3279 bv
= BLOCKVECTOR (s
);
3280 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3282 struct symbol_search
*prevtail
= tail
;
3284 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3285 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3287 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3290 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3292 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3293 && ((kind
== VARIABLES_DOMAIN
&& SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3294 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3295 && SYMBOL_CLASS (sym
) != LOC_CONST
)
3296 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3297 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3300 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3302 psr
->symtab
= real_symtab
;
3304 psr
->msymbol
= NULL
;
3316 if (prevtail
== NULL
)
3318 struct symbol_search dummy
;
3321 tail
= sort_search_symbols (&dummy
, nfound
);
3324 old_chain
= make_cleanup_free_search_symbols (sr
);
3327 tail
= sort_search_symbols (prevtail
, nfound
);
3332 /* If there are no eyes, avoid all contact. I mean, if there are
3333 no debug symbols, then print directly from the msymbol_vector. */
3335 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3337 ALL_MSYMBOLS (objfile
, msymbol
)
3339 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3340 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3341 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3342 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3345 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3347 /* Functions: Look up by address. */
3348 if (kind
!= FUNCTIONS_DOMAIN
||
3349 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3351 /* Variables/Absolutes: Look up by name */
3352 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3353 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3357 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3359 psr
->msymbol
= msymbol
;
3366 old_chain
= make_cleanup_free_search_symbols (sr
);
3380 discard_cleanups (old_chain
);
3383 /* Helper function for symtab_symbol_info, this function uses
3384 the data returned from search_symbols() to print information
3385 regarding the match to gdb_stdout.
3388 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3389 int block
, char *last
)
3391 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3393 fputs_filtered ("\nFile ", gdb_stdout
);
3394 fputs_filtered (s
->filename
, gdb_stdout
);
3395 fputs_filtered (":\n", gdb_stdout
);
3398 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3399 printf_filtered ("static ");
3401 /* Typedef that is not a C++ class */
3402 if (kind
== TYPES_DOMAIN
3403 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3404 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3405 /* variable, func, or typedef-that-is-c++-class */
3406 else if (kind
< TYPES_DOMAIN
||
3407 (kind
== TYPES_DOMAIN
&&
3408 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3410 type_print (SYMBOL_TYPE (sym
),
3411 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3412 ? "" : SYMBOL_PRINT_NAME (sym
)),
3415 printf_filtered (";\n");
3419 /* This help function for symtab_symbol_info() prints information
3420 for non-debugging symbols to gdb_stdout.
3423 print_msymbol_info (struct minimal_symbol
*msymbol
)
3425 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3428 if (gdbarch_addr_bit (gdbarch
) <= 32)
3429 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3430 & (CORE_ADDR
) 0xffffffff,
3433 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3435 printf_filtered ("%s %s\n",
3436 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3439 /* This is the guts of the commands "info functions", "info types", and
3440 "info variables". It calls search_symbols to find all matches and then
3441 print_[m]symbol_info to print out some useful information about the
3445 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3447 static char *classnames
[]
3449 {"variable", "function", "type", "method"};
3450 struct symbol_search
*symbols
;
3451 struct symbol_search
*p
;
3452 struct cleanup
*old_chain
;
3453 char *last_filename
= NULL
;
3456 /* must make sure that if we're interrupted, symbols gets freed */
3457 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3458 old_chain
= make_cleanup_free_search_symbols (symbols
);
3460 printf_filtered (regexp
3461 ? "All %ss matching regular expression \"%s\":\n"
3462 : "All defined %ss:\n",
3463 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3465 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3469 if (p
->msymbol
!= NULL
)
3473 printf_filtered ("\nNon-debugging symbols:\n");
3476 print_msymbol_info (p
->msymbol
);
3480 print_symbol_info (kind
,
3485 last_filename
= p
->symtab
->filename
;
3489 do_cleanups (old_chain
);
3493 variables_info (char *regexp
, int from_tty
)
3495 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3499 functions_info (char *regexp
, int from_tty
)
3501 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3506 types_info (char *regexp
, int from_tty
)
3508 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3511 /* Breakpoint all functions matching regular expression. */
3514 rbreak_command_wrapper (char *regexp
, int from_tty
)
3516 rbreak_command (regexp
, from_tty
);
3520 rbreak_command (char *regexp
, int from_tty
)
3522 struct symbol_search
*ss
;
3523 struct symbol_search
*p
;
3524 struct cleanup
*old_chain
;
3526 search_symbols (regexp
, FUNCTIONS_DOMAIN
, 0, (char **) NULL
, &ss
);
3527 old_chain
= make_cleanup_free_search_symbols (ss
);
3529 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3531 if (p
->msymbol
== NULL
)
3533 char *string
= alloca (strlen (p
->symtab
->filename
)
3534 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3536 strcpy (string
, p
->symtab
->filename
);
3537 strcat (string
, ":'");
3538 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3539 strcat (string
, "'");
3540 break_command (string
, from_tty
);
3541 print_symbol_info (FUNCTIONS_DOMAIN
,
3545 p
->symtab
->filename
);
3549 char *string
= alloca (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
))
3551 strcpy (string
, "'");
3552 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3553 strcat (string
, "'");
3555 break_command (string
, from_tty
);
3556 printf_filtered ("<function, no debug info> %s;\n",
3557 SYMBOL_PRINT_NAME (p
->msymbol
));
3561 do_cleanups (old_chain
);
3565 /* Helper routine for make_symbol_completion_list. */
3567 static int return_val_size
;
3568 static int return_val_index
;
3569 static char **return_val
;
3571 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3572 completion_list_add_name \
3573 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3575 /* Test to see if the symbol specified by SYMNAME (which is already
3576 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3577 characters. If so, add it to the current completion list. */
3580 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3581 char *text
, char *word
)
3586 /* clip symbols that cannot match */
3588 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3593 /* We have a match for a completion, so add SYMNAME to the current list
3594 of matches. Note that the name is moved to freshly malloc'd space. */
3598 if (word
== sym_text
)
3600 new = xmalloc (strlen (symname
) + 5);
3601 strcpy (new, symname
);
3603 else if (word
> sym_text
)
3605 /* Return some portion of symname. */
3606 new = xmalloc (strlen (symname
) + 5);
3607 strcpy (new, symname
+ (word
- sym_text
));
3611 /* Return some of SYM_TEXT plus symname. */
3612 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3613 strncpy (new, word
, sym_text
- word
);
3614 new[sym_text
- word
] = '\0';
3615 strcat (new, symname
);
3618 if (return_val_index
+ 3 > return_val_size
)
3620 newsize
= (return_val_size
*= 2) * sizeof (char *);
3621 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3623 return_val
[return_val_index
++] = new;
3624 return_val
[return_val_index
] = NULL
;
3628 /* ObjC: In case we are completing on a selector, look as the msymbol
3629 again and feed all the selectors into the mill. */
3632 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3633 int sym_text_len
, char *text
, char *word
)
3635 static char *tmp
= NULL
;
3636 static unsigned int tmplen
= 0;
3638 char *method
, *category
, *selector
;
3641 method
= SYMBOL_NATURAL_NAME (msymbol
);
3643 /* Is it a method? */
3644 if ((method
[0] != '-') && (method
[0] != '+'))
3647 if (sym_text
[0] == '[')
3648 /* Complete on shortened method method. */
3649 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3651 while ((strlen (method
) + 1) >= tmplen
)
3657 tmp
= xrealloc (tmp
, tmplen
);
3659 selector
= strchr (method
, ' ');
3660 if (selector
!= NULL
)
3663 category
= strchr (method
, '(');
3665 if ((category
!= NULL
) && (selector
!= NULL
))
3667 memcpy (tmp
, method
, (category
- method
));
3668 tmp
[category
- method
] = ' ';
3669 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3670 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3671 if (sym_text
[0] == '[')
3672 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3675 if (selector
!= NULL
)
3677 /* Complete on selector only. */
3678 strcpy (tmp
, selector
);
3679 tmp2
= strchr (tmp
, ']');
3683 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3687 /* Break the non-quoted text based on the characters which are in
3688 symbols. FIXME: This should probably be language-specific. */
3691 language_search_unquoted_string (char *text
, char *p
)
3693 for (; p
> text
; --p
)
3695 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3699 if ((current_language
->la_language
== language_objc
))
3701 if (p
[-1] == ':') /* might be part of a method name */
3703 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3704 p
-= 2; /* beginning of a method name */
3705 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3706 { /* might be part of a method name */
3709 /* Seeing a ' ' or a '(' is not conclusive evidence
3710 that we are in the middle of a method name. However,
3711 finding "-[" or "+[" should be pretty un-ambiguous.
3712 Unfortunately we have to find it now to decide. */
3715 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3716 t
[-1] == ' ' || t
[-1] == ':' ||
3717 t
[-1] == '(' || t
[-1] == ')')
3722 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3723 p
= t
- 2; /* method name detected */
3724 /* else we leave with p unchanged */
3734 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
3735 int sym_text_len
, char *text
, char *word
)
3737 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3739 struct type
*t
= SYMBOL_TYPE (sym
);
3740 enum type_code c
= TYPE_CODE (t
);
3743 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3744 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3745 if (TYPE_FIELD_NAME (t
, j
))
3746 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3747 sym_text
, sym_text_len
, text
, word
);
3751 /* Type of the user_data argument passed to add_macro_name. The
3752 contents are simply whatever is needed by
3753 completion_list_add_name. */
3754 struct add_macro_name_data
3762 /* A callback used with macro_for_each and macro_for_each_in_scope.
3763 This adds a macro's name to the current completion list. */
3765 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
3768 struct add_macro_name_data
*datum
= (struct add_macro_name_data
*) user_data
;
3769 completion_list_add_name ((char *) name
,
3770 datum
->sym_text
, datum
->sym_text_len
,
3771 datum
->text
, datum
->word
);
3775 default_make_symbol_completion_list (char *text
, char *word
)
3777 /* Problem: All of the symbols have to be copied because readline
3778 frees them. I'm not going to worry about this; hopefully there
3779 won't be that many. */
3783 struct partial_symtab
*ps
;
3784 struct minimal_symbol
*msymbol
;
3785 struct objfile
*objfile
;
3787 const struct block
*surrounding_static_block
, *surrounding_global_block
;
3788 struct dict_iterator iter
;
3789 struct partial_symbol
**psym
;
3790 /* The symbol we are completing on. Points in same buffer as text. */
3792 /* Length of sym_text. */
3795 /* Now look for the symbol we are supposed to complete on. */
3799 char *quote_pos
= NULL
;
3801 /* First see if this is a quoted string. */
3803 for (p
= text
; *p
!= '\0'; ++p
)
3805 if (quote_found
!= '\0')
3807 if (*p
== quote_found
)
3808 /* Found close quote. */
3810 else if (*p
== '\\' && p
[1] == quote_found
)
3811 /* A backslash followed by the quote character
3812 doesn't end the string. */
3815 else if (*p
== '\'' || *p
== '"')
3821 if (quote_found
== '\'')
3822 /* A string within single quotes can be a symbol, so complete on it. */
3823 sym_text
= quote_pos
+ 1;
3824 else if (quote_found
== '"')
3825 /* A double-quoted string is never a symbol, nor does it make sense
3826 to complete it any other way. */
3828 return_val
= (char **) xmalloc (sizeof (char *));
3829 return_val
[0] = NULL
;
3834 /* It is not a quoted string. Break it based on the characters
3835 which are in symbols. */
3838 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3847 sym_text_len
= strlen (sym_text
);
3849 return_val_size
= 100;
3850 return_val_index
= 0;
3851 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3852 return_val
[0] = NULL
;
3854 /* Look through the partial symtabs for all symbols which begin
3855 by matching SYM_TEXT. Add each one that you find to the list. */
3857 ALL_PSYMTABS (objfile
, ps
)
3859 /* If the psymtab's been read in we'll get it when we search
3860 through the blockvector. */
3864 for (psym
= objfile
->global_psymbols
.list
+ ps
->globals_offset
;
3865 psym
< (objfile
->global_psymbols
.list
+ ps
->globals_offset
3866 + ps
->n_global_syms
);
3869 /* If interrupted, then quit. */
3871 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3874 for (psym
= objfile
->static_psymbols
.list
+ ps
->statics_offset
;
3875 psym
< (objfile
->static_psymbols
.list
+ ps
->statics_offset
3876 + ps
->n_static_syms
);
3880 COMPLETION_LIST_ADD_SYMBOL (*psym
, sym_text
, sym_text_len
, text
, word
);
3884 /* At this point scan through the misc symbol vectors and add each
3885 symbol you find to the list. Eventually we want to ignore
3886 anything that isn't a text symbol (everything else will be
3887 handled by the psymtab code above). */
3889 ALL_MSYMBOLS (objfile
, msymbol
)
3892 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3894 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3897 /* Search upwards from currently selected frame (so that we can
3898 complete on local vars). Also catch fields of types defined in
3899 this places which match our text string. Only complete on types
3900 visible from current context. */
3902 b
= get_selected_block (0);
3903 surrounding_static_block
= block_static_block (b
);
3904 surrounding_global_block
= block_global_block (b
);
3905 if (surrounding_static_block
!= NULL
)
3906 while (b
!= surrounding_static_block
)
3910 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3912 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
3914 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
3918 /* Stop when we encounter an enclosing function. Do not stop for
3919 non-inlined functions - the locals of the enclosing function
3920 are in scope for a nested function. */
3921 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3923 b
= BLOCK_SUPERBLOCK (b
);
3926 /* Add fields from the file's types; symbols will be added below. */
3928 if (surrounding_static_block
!= NULL
)
3929 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
3930 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3932 if (surrounding_global_block
!= NULL
)
3933 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
3934 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3936 /* Go through the symtabs and check the externs and statics for
3937 symbols which match. */
3939 ALL_PRIMARY_SYMTABS (objfile
, s
)
3942 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3943 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3945 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3949 ALL_PRIMARY_SYMTABS (objfile
, s
)
3952 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3953 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3955 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3959 if (current_language
->la_macro_expansion
== macro_expansion_c
)
3961 struct macro_scope
*scope
;
3962 struct add_macro_name_data datum
;
3964 datum
.sym_text
= sym_text
;
3965 datum
.sym_text_len
= sym_text_len
;
3969 /* Add any macros visible in the default scope. Note that this
3970 may yield the occasional wrong result, because an expression
3971 might be evaluated in a scope other than the default. For
3972 example, if the user types "break file:line if <TAB>", the
3973 resulting expression will be evaluated at "file:line" -- but
3974 at there does not seem to be a way to detect this at
3976 scope
= default_macro_scope ();
3979 macro_for_each_in_scope (scope
->file
, scope
->line
,
3980 add_macro_name
, &datum
);
3984 /* User-defined macros are always visible. */
3985 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
3988 return (return_val
);
3991 /* Return a NULL terminated array of all symbols (regardless of class)
3992 which begin by matching TEXT. If the answer is no symbols, then
3993 the return value is an array which contains only a NULL pointer. */
3996 make_symbol_completion_list (char *text
, char *word
)
3998 return current_language
->la_make_symbol_completion_list (text
, word
);
4001 /* Like make_symbol_completion_list, but suitable for use as a
4002 completion function. */
4005 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4006 char *text
, char *word
)
4008 return make_symbol_completion_list (text
, word
);
4011 /* Like make_symbol_completion_list, but returns a list of symbols
4012 defined in a source file FILE. */
4015 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
4020 struct dict_iterator iter
;
4021 /* The symbol we are completing on. Points in same buffer as text. */
4023 /* Length of sym_text. */
4026 /* Now look for the symbol we are supposed to complete on.
4027 FIXME: This should be language-specific. */
4031 char *quote_pos
= NULL
;
4033 /* First see if this is a quoted string. */
4035 for (p
= text
; *p
!= '\0'; ++p
)
4037 if (quote_found
!= '\0')
4039 if (*p
== quote_found
)
4040 /* Found close quote. */
4042 else if (*p
== '\\' && p
[1] == quote_found
)
4043 /* A backslash followed by the quote character
4044 doesn't end the string. */
4047 else if (*p
== '\'' || *p
== '"')
4053 if (quote_found
== '\'')
4054 /* A string within single quotes can be a symbol, so complete on it. */
4055 sym_text
= quote_pos
+ 1;
4056 else if (quote_found
== '"')
4057 /* A double-quoted string is never a symbol, nor does it make sense
4058 to complete it any other way. */
4060 return_val
= (char **) xmalloc (sizeof (char *));
4061 return_val
[0] = NULL
;
4066 /* Not a quoted string. */
4067 sym_text
= language_search_unquoted_string (text
, p
);
4071 sym_text_len
= strlen (sym_text
);
4073 return_val_size
= 10;
4074 return_val_index
= 0;
4075 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
4076 return_val
[0] = NULL
;
4078 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4080 s
= lookup_symtab (srcfile
);
4083 /* Maybe they typed the file with leading directories, while the
4084 symbol tables record only its basename. */
4085 const char *tail
= lbasename (srcfile
);
4088 s
= lookup_symtab (tail
);
4091 /* If we have no symtab for that file, return an empty list. */
4093 return (return_val
);
4095 /* Go through this symtab and check the externs and statics for
4096 symbols which match. */
4098 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4099 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4101 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4104 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4105 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4107 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4110 return (return_val
);
4113 /* A helper function for make_source_files_completion_list. It adds
4114 another file name to a list of possible completions, growing the
4115 list as necessary. */
4118 add_filename_to_list (const char *fname
, char *text
, char *word
,
4119 char ***list
, int *list_used
, int *list_alloced
)
4122 size_t fnlen
= strlen (fname
);
4124 if (*list_used
+ 1 >= *list_alloced
)
4127 *list
= (char **) xrealloc ((char *) *list
,
4128 *list_alloced
* sizeof (char *));
4133 /* Return exactly fname. */
4134 new = xmalloc (fnlen
+ 5);
4135 strcpy (new, fname
);
4137 else if (word
> text
)
4139 /* Return some portion of fname. */
4140 new = xmalloc (fnlen
+ 5);
4141 strcpy (new, fname
+ (word
- text
));
4145 /* Return some of TEXT plus fname. */
4146 new = xmalloc (fnlen
+ (text
- word
) + 5);
4147 strncpy (new, word
, text
- word
);
4148 new[text
- word
] = '\0';
4149 strcat (new, fname
);
4151 (*list
)[*list_used
] = new;
4152 (*list
)[++*list_used
] = NULL
;
4156 not_interesting_fname (const char *fname
)
4158 static const char *illegal_aliens
[] = {
4159 "_globals_", /* inserted by coff_symtab_read */
4164 for (i
= 0; illegal_aliens
[i
]; i
++)
4166 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
4172 /* Return a NULL terminated array of all source files whose names
4173 begin with matching TEXT. The file names are looked up in the
4174 symbol tables of this program. If the answer is no matchess, then
4175 the return value is an array which contains only a NULL pointer. */
4178 make_source_files_completion_list (char *text
, char *word
)
4181 struct partial_symtab
*ps
;
4182 struct objfile
*objfile
;
4184 int list_alloced
= 1;
4186 size_t text_len
= strlen (text
);
4187 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4188 const char *base_name
;
4192 if (!have_full_symbols () && !have_partial_symbols ())
4195 ALL_SYMTABS (objfile
, s
)
4197 if (not_interesting_fname (s
->filename
))
4199 if (!filename_seen (s
->filename
, 1, &first
)
4200 #if HAVE_DOS_BASED_FILE_SYSTEM
4201 && strncasecmp (s
->filename
, text
, text_len
) == 0
4203 && strncmp (s
->filename
, text
, text_len
) == 0
4207 /* This file matches for a completion; add it to the current
4209 add_filename_to_list (s
->filename
, text
, word
,
4210 &list
, &list_used
, &list_alloced
);
4214 /* NOTE: We allow the user to type a base name when the
4215 debug info records leading directories, but not the other
4216 way around. This is what subroutines of breakpoint
4217 command do when they parse file names. */
4218 base_name
= lbasename (s
->filename
);
4219 if (base_name
!= s
->filename
4220 && !filename_seen (base_name
, 1, &first
)
4221 #if HAVE_DOS_BASED_FILE_SYSTEM
4222 && strncasecmp (base_name
, text
, text_len
) == 0
4224 && strncmp (base_name
, text
, text_len
) == 0
4227 add_filename_to_list (base_name
, text
, word
,
4228 &list
, &list_used
, &list_alloced
);
4232 ALL_PSYMTABS (objfile
, ps
)
4234 if (not_interesting_fname (ps
->filename
))
4238 if (!filename_seen (ps
->filename
, 1, &first
)
4239 #if HAVE_DOS_BASED_FILE_SYSTEM
4240 && strncasecmp (ps
->filename
, text
, text_len
) == 0
4242 && strncmp (ps
->filename
, text
, text_len
) == 0
4246 /* This file matches for a completion; add it to the
4247 current list of matches. */
4248 add_filename_to_list (ps
->filename
, text
, word
,
4249 &list
, &list_used
, &list_alloced
);
4254 base_name
= lbasename (ps
->filename
);
4255 if (base_name
!= ps
->filename
4256 && !filename_seen (base_name
, 1, &first
)
4257 #if HAVE_DOS_BASED_FILE_SYSTEM
4258 && strncasecmp (base_name
, text
, text_len
) == 0
4260 && strncmp (base_name
, text
, text_len
) == 0
4263 add_filename_to_list (base_name
, text
, word
,
4264 &list
, &list_used
, &list_alloced
);
4272 /* Determine if PC is in the prologue of a function. The prologue is the area
4273 between the first instruction of a function, and the first executable line.
4274 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4276 If non-zero, func_start is where we think the prologue starts, possibly
4277 by previous examination of symbol table information.
4281 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4283 struct symtab_and_line sal
;
4284 CORE_ADDR func_addr
, func_end
;
4286 /* We have several sources of information we can consult to figure
4288 - Compilers usually emit line number info that marks the prologue
4289 as its own "source line". So the ending address of that "line"
4290 is the end of the prologue. If available, this is the most
4292 - The minimal symbols and partial symbols, which can usually tell
4293 us the starting and ending addresses of a function.
4294 - If we know the function's start address, we can call the
4295 architecture-defined gdbarch_skip_prologue function to analyze the
4296 instruction stream and guess where the prologue ends.
4297 - Our `func_start' argument; if non-zero, this is the caller's
4298 best guess as to the function's entry point. At the time of
4299 this writing, handle_inferior_event doesn't get this right, so
4300 it should be our last resort. */
4302 /* Consult the partial symbol table, to find which function
4304 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4306 CORE_ADDR prologue_end
;
4308 /* We don't even have minsym information, so fall back to using
4309 func_start, if given. */
4311 return 1; /* We *might* be in a prologue. */
4313 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4315 return func_start
<= pc
&& pc
< prologue_end
;
4318 /* If we have line number information for the function, that's
4319 usually pretty reliable. */
4320 sal
= find_pc_line (func_addr
, 0);
4322 /* Now sal describes the source line at the function's entry point,
4323 which (by convention) is the prologue. The end of that "line",
4324 sal.end, is the end of the prologue.
4326 Note that, for functions whose source code is all on a single
4327 line, the line number information doesn't always end up this way.
4328 So we must verify that our purported end-of-prologue address is
4329 *within* the function, not at its start or end. */
4331 || sal
.end
<= func_addr
4332 || func_end
<= sal
.end
)
4334 /* We don't have any good line number info, so use the minsym
4335 information, together with the architecture-specific prologue
4337 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4339 return func_addr
<= pc
&& pc
< prologue_end
;
4342 /* We have line number info, and it looks good. */
4343 return func_addr
<= pc
&& pc
< sal
.end
;
4346 /* Given PC at the function's start address, attempt to find the
4347 prologue end using SAL information. Return zero if the skip fails.
4349 A non-optimized prologue traditionally has one SAL for the function
4350 and a second for the function body. A single line function has
4351 them both pointing at the same line.
4353 An optimized prologue is similar but the prologue may contain
4354 instructions (SALs) from the instruction body. Need to skip those
4355 while not getting into the function body.
4357 The functions end point and an increasing SAL line are used as
4358 indicators of the prologue's endpoint.
4360 This code is based on the function refine_prologue_limit (versions
4361 found in both ia64 and ppc). */
4364 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4366 struct symtab_and_line prologue_sal
;
4371 /* Get an initial range for the function. */
4372 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4373 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4375 prologue_sal
= find_pc_line (start_pc
, 0);
4376 if (prologue_sal
.line
!= 0)
4378 /* For langauges other than assembly, treat two consecutive line
4379 entries at the same address as a zero-instruction prologue.
4380 The GNU assembler emits separate line notes for each instruction
4381 in a multi-instruction macro, but compilers generally will not
4383 if (prologue_sal
.symtab
->language
!= language_asm
)
4385 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4389 /* Skip any earlier lines, and any end-of-sequence marker
4390 from a previous function. */
4391 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4392 || linetable
->item
[idx
].line
== 0)
4395 if (idx
+1 < linetable
->nitems
4396 && linetable
->item
[idx
+1].line
!= 0
4397 && linetable
->item
[idx
+1].pc
== start_pc
)
4401 /* If there is only one sal that covers the entire function,
4402 then it is probably a single line function, like
4404 if (prologue_sal
.end
>= end_pc
)
4407 while (prologue_sal
.end
< end_pc
)
4409 struct symtab_and_line sal
;
4411 sal
= find_pc_line (prologue_sal
.end
, 0);
4414 /* Assume that a consecutive SAL for the same (or larger)
4415 line mark the prologue -> body transition. */
4416 if (sal
.line
>= prologue_sal
.line
)
4419 /* The line number is smaller. Check that it's from the
4420 same function, not something inlined. If it's inlined,
4421 then there is no point comparing the line numbers. */
4422 bl
= block_for_pc (prologue_sal
.end
);
4425 if (block_inlined_p (bl
))
4427 if (BLOCK_FUNCTION (bl
))
4432 bl
= BLOCK_SUPERBLOCK (bl
);
4437 /* The case in which compiler's optimizer/scheduler has
4438 moved instructions into the prologue. We look ahead in
4439 the function looking for address ranges whose
4440 corresponding line number is less the first one that we
4441 found for the function. This is more conservative then
4442 refine_prologue_limit which scans a large number of SALs
4443 looking for any in the prologue */
4448 if (prologue_sal
.end
< end_pc
)
4449 /* Return the end of this line, or zero if we could not find a
4451 return prologue_sal
.end
;
4453 /* Don't return END_PC, which is past the end of the function. */
4454 return prologue_sal
.pc
;
4457 struct symtabs_and_lines
4458 decode_line_spec (char *string
, int funfirstline
)
4460 struct symtabs_and_lines sals
;
4461 struct symtab_and_line cursal
;
4464 error (_("Empty line specification."));
4466 /* We use whatever is set as the current source line. We do not try
4467 and get a default or it will recursively call us! */
4468 cursal
= get_current_source_symtab_and_line ();
4470 sals
= decode_line_1 (&string
, funfirstline
,
4471 cursal
.symtab
, cursal
.line
,
4472 (char ***) NULL
, NULL
);
4475 error (_("Junk at end of line specification: %s"), string
);
4480 static char *name_of_main
;
4483 set_main_name (const char *name
)
4485 if (name_of_main
!= NULL
)
4487 xfree (name_of_main
);
4488 name_of_main
= NULL
;
4492 name_of_main
= xstrdup (name
);
4496 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4500 find_main_name (void)
4502 const char *new_main_name
;
4504 /* Try to see if the main procedure is in Ada. */
4505 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4506 be to add a new method in the language vector, and call this
4507 method for each language until one of them returns a non-empty
4508 name. This would allow us to remove this hard-coded call to
4509 an Ada function. It is not clear that this is a better approach
4510 at this point, because all methods need to be written in a way
4511 such that false positives never be returned. For instance, it is
4512 important that a method does not return a wrong name for the main
4513 procedure if the main procedure is actually written in a different
4514 language. It is easy to guaranty this with Ada, since we use a
4515 special symbol generated only when the main in Ada to find the name
4516 of the main procedure. It is difficult however to see how this can
4517 be guarantied for languages such as C, for instance. This suggests
4518 that order of call for these methods becomes important, which means
4519 a more complicated approach. */
4520 new_main_name
= ada_main_name ();
4521 if (new_main_name
!= NULL
)
4523 set_main_name (new_main_name
);
4527 new_main_name
= pascal_main_name ();
4528 if (new_main_name
!= NULL
)
4530 set_main_name (new_main_name
);
4534 /* The languages above didn't identify the name of the main procedure.
4535 Fallback to "main". */
4536 set_main_name ("main");
4542 if (name_of_main
== NULL
)
4545 return name_of_main
;
4548 /* Handle ``executable_changed'' events for the symtab module. */
4551 symtab_observer_executable_changed (void)
4553 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4554 set_main_name (NULL
);
4557 /* Helper to expand_line_sal below. Appends new sal to SAL,
4558 initializing it from SYMTAB, LINENO and PC. */
4560 append_expanded_sal (struct symtabs_and_lines
*sal
,
4561 struct symtab
*symtab
,
4562 int lineno
, CORE_ADDR pc
)
4564 sal
->sals
= xrealloc (sal
->sals
,
4565 sizeof (sal
->sals
[0])
4566 * (sal
->nelts
+ 1));
4567 init_sal (sal
->sals
+ sal
->nelts
);
4568 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4569 sal
->sals
[sal
->nelts
].section
= NULL
;
4570 sal
->sals
[sal
->nelts
].end
= 0;
4571 sal
->sals
[sal
->nelts
].line
= lineno
;
4572 sal
->sals
[sal
->nelts
].pc
= pc
;
4576 /* Helper to expand_line_sal below. Search in the symtabs for any
4577 linetable entry that exactly matches FILENAME and LINENO and append
4578 them to RET. If there is at least one match, return 1; otherwise,
4579 return 0, and return the best choice in BEST_ITEM and BEST_SYMTAB. */
4582 append_exact_match_to_sals (char *filename
, int lineno
,
4583 struct symtabs_and_lines
*ret
,
4584 struct linetable_entry
**best_item
,
4585 struct symtab
**best_symtab
)
4587 struct objfile
*objfile
;
4588 struct symtab
*symtab
;
4594 ALL_SYMTABS (objfile
, symtab
)
4596 if (strcmp (filename
, symtab
->filename
) == 0)
4598 struct linetable
*l
;
4600 l
= LINETABLE (symtab
);
4605 for (j
= 0; j
< len
; j
++)
4607 struct linetable_entry
*item
= &(l
->item
[j
]);
4609 if (item
->line
== lineno
)
4612 append_expanded_sal (ret
, symtab
, lineno
, item
->pc
);
4614 else if (!exact
&& item
->line
> lineno
4615 && (*best_item
== NULL
4616 || item
->line
< (*best_item
)->line
))
4619 *best_symtab
= symtab
;
4627 /* Compute a set of all sals in
4628 the entire program that correspond to same file
4629 and line as SAL and return those. If there
4630 are several sals that belong to the same block,
4631 only one sal for the block is included in results. */
4633 struct symtabs_and_lines
4634 expand_line_sal (struct symtab_and_line sal
)
4636 struct symtabs_and_lines ret
, this_line
;
4638 struct objfile
*objfile
;
4639 struct partial_symtab
*psymtab
;
4640 struct symtab
*symtab
;
4643 struct block
**blocks
= NULL
;
4649 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4651 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4658 struct linetable_entry
*best_item
= 0;
4659 struct symtab
*best_symtab
= 0;
4664 /* We need to find all symtabs for a file which name
4665 is described by sal. We cannot just directly
4666 iterate over symtabs, since a symtab might not be
4667 yet created. We also cannot iterate over psymtabs,
4668 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4669 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4670 corresponding to an included file. Therefore, we do
4671 first pass over psymtabs, reading in those with
4672 the right name. Then, we iterate over symtabs, knowing
4673 that all symtabs we're interested in are loaded. */
4675 ALL_PSYMTABS (objfile
, psymtab
)
4677 if (strcmp (sal
.symtab
->filename
,
4678 psymtab
->filename
) == 0)
4679 PSYMTAB_TO_SYMTAB (psymtab
);
4682 /* Now search the symtab for exact matches and append them. If
4683 none is found, append the best_item and all its exact
4685 exact
= append_exact_match_to_sals (sal
.symtab
->filename
, lineno
,
4686 &ret
, &best_item
, &best_symtab
);
4687 if (!exact
&& best_item
)
4688 append_exact_match_to_sals (best_symtab
->filename
, best_item
->line
,
4689 &ret
, &best_item
, &best_symtab
);
4692 /* For optimized code, compiler can scatter one source line accross
4693 disjoint ranges of PC values, even when no duplicate functions
4694 or inline functions are involved. For example, 'for (;;)' inside
4695 non-template non-inline non-ctor-or-dtor function can result
4696 in two PC ranges. In this case, we don't want to set breakpoint
4697 on first PC of each range. To filter such cases, we use containing
4698 blocks -- for each PC found above we see if there are other PCs
4699 that are in the same block. If yes, the other PCs are filtered out. */
4701 filter
= alloca (ret
.nelts
* sizeof (int));
4702 blocks
= alloca (ret
.nelts
* sizeof (struct block
*));
4703 for (i
= 0; i
< ret
.nelts
; ++i
)
4706 blocks
[i
] = block_for_pc (ret
.sals
[i
].pc
);
4709 for (i
= 0; i
< ret
.nelts
; ++i
)
4710 if (blocks
[i
] != NULL
)
4711 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4712 if (blocks
[j
] == blocks
[i
])
4720 struct symtab_and_line
*final
=
4721 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4723 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4725 final
[j
++] = ret
.sals
[i
];
4727 ret
.nelts
-= deleted
;
4737 _initialize_symtab (void)
4739 add_info ("variables", variables_info
, _("\
4740 All global and static variable names, or those matching REGEXP."));
4742 add_com ("whereis", class_info
, variables_info
, _("\
4743 All global and static variable names, or those matching REGEXP."));
4745 add_info ("functions", functions_info
,
4746 _("All function names, or those matching REGEXP."));
4748 /* FIXME: This command has at least the following problems:
4749 1. It prints builtin types (in a very strange and confusing fashion).
4750 2. It doesn't print right, e.g. with
4751 typedef struct foo *FOO
4752 type_print prints "FOO" when we want to make it (in this situation)
4753 print "struct foo *".
4754 I also think "ptype" or "whatis" is more likely to be useful (but if
4755 there is much disagreement "info types" can be fixed). */
4756 add_info ("types", types_info
,
4757 _("All type names, or those matching REGEXP."));
4759 add_info ("sources", sources_info
,
4760 _("Source files in the program."));
4762 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4763 _("Set a breakpoint for all functions matching REGEXP."));
4767 add_com ("lf", class_info
, sources_info
,
4768 _("Source files in the program"));
4769 add_com ("lg", class_info
, variables_info
, _("\
4770 All global and static variable names, or those matching REGEXP."));
4773 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4774 multiple_symbols_modes
, &multiple_symbols_mode
,
4776 Set the debugger behavior when more than one symbol are possible matches\n\
4777 in an expression."), _("\
4778 Show how the debugger handles ambiguities in expressions."), _("\
4779 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4780 NULL
, NULL
, &setlist
, &showlist
);
4782 /* Initialize the one built-in type that isn't language dependent... */
4783 builtin_type_error
= init_type (TYPE_CODE_ERROR
, 0, 0,
4784 "<unknown type>", (struct objfile
*) NULL
);
4786 observer_attach_executable_changed (symtab_observer_executable_changed
);