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 2010 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"
49 #include "gdb_obstack.h"
51 #include "dictionary.h"
53 #include <sys/types.h>
55 #include "gdb_string.h"
59 #include "cp-support.h"
61 #include "gdb_assert.h"
64 #include "macroscope.h"
68 /* Prototypes for local functions */
70 static void completion_list_add_name (char *, char *, int, char *, char *);
72 static void rbreak_command (char *, int);
74 static void types_info (char *, int);
76 static void functions_info (char *, int);
78 static void variables_info (char *, int);
80 static void sources_info (char *, int);
82 static void output_source_filename (const char *, int *);
84 static int find_line_common (struct linetable
*, int, int *);
86 /* This one is used by linespec.c */
88 char *operator_chars (char *p
, char **end
);
90 static struct symbol
*lookup_symbol_aux (const char *name
,
91 const struct block
*block
,
92 const domain_enum domain
,
93 enum language language
,
94 int *is_a_field_of_this
);
97 struct symbol
*lookup_symbol_aux_local (const char *name
,
98 const struct block
*block
,
99 const domain_enum domain
,
100 enum language language
);
103 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
105 const domain_enum domain
);
108 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
111 const domain_enum domain
);
113 static void print_symbol_info (domain_enum
,
114 struct symtab
*, struct symbol
*, int, char *);
116 static void print_msymbol_info (struct minimal_symbol
*);
118 static void symtab_symbol_info (char *, domain_enum
, int);
120 void _initialize_symtab (void);
124 /* Allow the user to configure the debugger behavior with respect
125 to multiple-choice menus when more than one symbol matches during
128 const char multiple_symbols_ask
[] = "ask";
129 const char multiple_symbols_all
[] = "all";
130 const char multiple_symbols_cancel
[] = "cancel";
131 static const char *multiple_symbols_modes
[] =
133 multiple_symbols_ask
,
134 multiple_symbols_all
,
135 multiple_symbols_cancel
,
138 static const char *multiple_symbols_mode
= multiple_symbols_all
;
140 /* Read-only accessor to AUTO_SELECT_MODE. */
143 multiple_symbols_select_mode (void)
145 return multiple_symbols_mode
;
148 /* Block in which the most recently searched-for symbol was found.
149 Might be better to make this a parameter to lookup_symbol and
152 const struct block
*block_found
;
154 /* Check for a symtab of a specific name; first in symtabs, then in
155 psymtabs. *If* there is no '/' in the name, a match after a '/'
156 in the symtab filename will also work. */
159 lookup_symtab (const char *name
)
162 struct symtab
*s
= NULL
;
163 struct objfile
*objfile
;
164 char *real_path
= NULL
;
165 char *full_path
= NULL
;
167 /* Here we are interested in canonicalizing an absolute path, not
168 absolutizing a relative path. */
169 if (IS_ABSOLUTE_PATH (name
))
171 full_path
= xfullpath (name
);
172 make_cleanup (xfree
, full_path
);
173 real_path
= gdb_realpath (name
);
174 make_cleanup (xfree
, real_path
);
179 /* First, search for an exact match */
181 ALL_SYMTABS (objfile
, s
)
183 if (FILENAME_CMP (name
, s
->filename
) == 0)
188 /* If the user gave us an absolute path, try to find the file in
189 this symtab and use its absolute path. */
191 if (full_path
!= NULL
)
193 const char *fp
= symtab_to_fullname (s
);
195 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
201 if (real_path
!= NULL
)
203 char *fullname
= symtab_to_fullname (s
);
205 if (fullname
!= NULL
)
207 char *rp
= gdb_realpath (fullname
);
209 make_cleanup (xfree
, rp
);
210 if (FILENAME_CMP (real_path
, rp
) == 0)
218 /* Now, search for a matching tail (only if name doesn't have any dirs) */
220 if (lbasename (name
) == name
)
221 ALL_SYMTABS (objfile
, s
)
223 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
227 /* Same search rules as above apply here, but now we look thru the
231 ALL_OBJFILES (objfile
)
234 && objfile
->sf
->qf
->lookup_symtab (objfile
, name
, full_path
, real_path
,
247 /* At this point, we have located the psymtab for this file, but
248 the conversion to a symtab has failed. This usually happens
249 when we are looking up an include file. In this case,
250 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
251 been created. So, we need to run through the symtabs again in
252 order to find the file.
253 XXX - This is a crock, and should be fixed inside of the the
254 symbol parsing routines. */
258 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
259 full method name, which consist of the class name (from T), the unadorned
260 method name from METHOD_ID, and the signature for the specific overload,
261 specified by SIGNATURE_ID. Note that this function is g++ specific. */
264 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
266 int mangled_name_len
;
268 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
269 struct fn_field
*method
= &f
[signature_id
];
270 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
271 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
272 char *newname
= type_name_no_tag (type
);
274 /* Does the form of physname indicate that it is the full mangled name
275 of a constructor (not just the args)? */
276 int is_full_physname_constructor
;
279 int is_destructor
= is_destructor_name (physname
);
280 /* Need a new type prefix. */
281 char *const_prefix
= method
->is_const
? "C" : "";
282 char *volatile_prefix
= method
->is_volatile
? "V" : "";
284 int len
= (newname
== NULL
? 0 : strlen (newname
));
286 /* Nothing to do if physname already contains a fully mangled v3 abi name
287 or an operator name. */
288 if ((physname
[0] == '_' && physname
[1] == 'Z')
289 || is_operator_name (field_name
))
290 return xstrdup (physname
);
292 is_full_physname_constructor
= is_constructor_name (physname
);
295 is_full_physname_constructor
|| (newname
&& strcmp (field_name
, newname
) == 0);
298 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
300 if (is_destructor
|| is_full_physname_constructor
)
302 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
303 strcpy (mangled_name
, physname
);
309 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
311 else if (physname
[0] == 't' || physname
[0] == 'Q')
313 /* The physname for template and qualified methods already includes
315 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
321 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
323 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
324 + strlen (buf
) + len
+ strlen (physname
) + 1);
326 mangled_name
= (char *) xmalloc (mangled_name_len
);
328 mangled_name
[0] = '\0';
330 strcpy (mangled_name
, field_name
);
332 strcat (mangled_name
, buf
);
333 /* If the class doesn't have a name, i.e. newname NULL, then we just
334 mangle it using 0 for the length of the class. Thus it gets mangled
335 as something starting with `::' rather than `classname::'. */
337 strcat (mangled_name
, newname
);
339 strcat (mangled_name
, physname
);
340 return (mangled_name
);
343 /* Initialize the cplus_specific structure. 'cplus_specific' should
344 only be allocated for use with cplus symbols. */
347 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
348 struct objfile
*objfile
)
350 /* A language_specific structure should not have been previously
352 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
353 gdb_assert (objfile
!= NULL
);
355 gsymbol
->language_specific
.cplus_specific
=
356 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
359 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
360 correctly allocated. For C++ symbols a cplus_specific struct is
361 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
362 OBJFILE can be NULL. */
364 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
366 struct objfile
*objfile
)
368 if (gsymbol
->language
== language_cplus
)
370 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
371 symbol_init_cplus_specific (gsymbol
, objfile
);
373 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
376 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
379 /* Return the demangled name of GSYMBOL. */
381 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
383 if (gsymbol
->language
== language_cplus
)
385 gdb_assert (gsymbol
->language_specific
.cplus_specific
!= NULL
);
386 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
389 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
393 /* Initialize the language dependent portion of a symbol
394 depending upon the language for the symbol. */
396 symbol_init_language_specific (struct general_symbol_info
*gsymbol
,
397 enum language language
)
400 gsymbol
->language
= language
;
401 if (gsymbol
->language
== language_cplus
402 || gsymbol
->language
== language_d
403 || gsymbol
->language
== language_java
404 || gsymbol
->language
== language_objc
405 || gsymbol
->language
== language_fortran
)
407 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
409 else if (gsymbol
->language
== language_cplus
)
410 gsymbol
->language_specific
.cplus_specific
= NULL
;
413 memset (&gsymbol
->language_specific
, 0,
414 sizeof (gsymbol
->language_specific
));
418 /* Functions to initialize a symbol's mangled name. */
420 /* Objects of this type are stored in the demangled name hash table. */
421 struct demangled_name_entry
427 /* Hash function for the demangled name hash. */
429 hash_demangled_name_entry (const void *data
)
431 const struct demangled_name_entry
*e
= data
;
433 return htab_hash_string (e
->mangled
);
436 /* Equality function for the demangled name hash. */
438 eq_demangled_name_entry (const void *a
, const void *b
)
440 const struct demangled_name_entry
*da
= a
;
441 const struct demangled_name_entry
*db
= b
;
443 return strcmp (da
->mangled
, db
->mangled
) == 0;
446 /* Create the hash table used for demangled names. Each hash entry is
447 a pair of strings; one for the mangled name and one for the demangled
448 name. The entry is hashed via just the mangled name. */
451 create_demangled_names_hash (struct objfile
*objfile
)
453 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
454 The hash table code will round this up to the next prime number.
455 Choosing a much larger table size wastes memory, and saves only about
456 1% in symbol reading. */
458 objfile
->demangled_names_hash
= htab_create_alloc
459 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
460 NULL
, xcalloc
, xfree
);
463 /* Try to determine the demangled name for a symbol, based on the
464 language of that symbol. If the language is set to language_auto,
465 it will attempt to find any demangling algorithm that works and
466 then set the language appropriately. The returned name is allocated
467 by the demangler and should be xfree'd. */
470 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
473 char *demangled
= NULL
;
475 if (gsymbol
->language
== language_unknown
)
476 gsymbol
->language
= language_auto
;
478 if (gsymbol
->language
== language_objc
479 || gsymbol
->language
== language_auto
)
482 objc_demangle (mangled
, 0);
483 if (demangled
!= NULL
)
485 gsymbol
->language
= language_objc
;
489 if (gsymbol
->language
== language_cplus
490 || gsymbol
->language
== language_auto
)
493 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
| DMGL_VERBOSE
);
494 if (demangled
!= NULL
)
496 gsymbol
->language
= language_cplus
;
500 if (gsymbol
->language
== language_java
)
503 cplus_demangle (mangled
,
504 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
505 if (demangled
!= NULL
)
507 gsymbol
->language
= language_java
;
511 if (gsymbol
->language
== language_d
512 || gsymbol
->language
== language_auto
)
514 demangled
= d_demangle(mangled
, 0);
515 if (demangled
!= NULL
)
517 gsymbol
->language
= language_d
;
521 /* We could support `gsymbol->language == language_fortran' here to provide
522 module namespaces also for inferiors with only minimal symbol table (ELF
523 symbols). Just the mangling standard is not standardized across compilers
524 and there is no DW_AT_producer available for inferiors with only the ELF
525 symbols to check the mangling kind. */
529 /* Set both the mangled and demangled (if any) names for GSYMBOL based
530 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
531 objfile's obstack; but if COPY_NAME is 0 and if NAME is
532 NUL-terminated, then this function assumes that NAME is already
533 correctly saved (either permanently or with a lifetime tied to the
534 objfile), and it will not be copied.
536 The hash table corresponding to OBJFILE is used, and the memory
537 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
538 so the pointer can be discarded after calling this function. */
540 /* We have to be careful when dealing with Java names: when we run
541 into a Java minimal symbol, we don't know it's a Java symbol, so it
542 gets demangled as a C++ name. This is unfortunate, but there's not
543 much we can do about it: but when demangling partial symbols and
544 regular symbols, we'd better not reuse the wrong demangled name.
545 (See PR gdb/1039.) We solve this by putting a distinctive prefix
546 on Java names when storing them in the hash table. */
548 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
549 don't mind the Java prefix so much: different languages have
550 different demangling requirements, so it's only natural that we
551 need to keep language data around in our demangling cache. But
552 it's not good that the minimal symbol has the wrong demangled name.
553 Unfortunately, I can't think of any easy solution to that
556 #define JAVA_PREFIX "##JAVA$$"
557 #define JAVA_PREFIX_LEN 8
560 symbol_set_names (struct general_symbol_info
*gsymbol
,
561 const char *linkage_name
, int len
, int copy_name
,
562 struct objfile
*objfile
)
564 struct demangled_name_entry
**slot
;
565 /* A 0-terminated copy of the linkage name. */
566 const char *linkage_name_copy
;
567 /* A copy of the linkage name that might have a special Java prefix
568 added to it, for use when looking names up in the hash table. */
569 const char *lookup_name
;
570 /* The length of lookup_name. */
572 struct demangled_name_entry entry
;
574 if (gsymbol
->language
== language_ada
)
576 /* In Ada, we do the symbol lookups using the mangled name, so
577 we can save some space by not storing the demangled name.
579 As a side note, we have also observed some overlap between
580 the C++ mangling and Ada mangling, similarly to what has
581 been observed with Java. Because we don't store the demangled
582 name with the symbol, we don't need to use the same trick
585 gsymbol
->name
= (char *) linkage_name
;
588 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
589 memcpy (gsymbol
->name
, linkage_name
, len
);
590 gsymbol
->name
[len
] = '\0';
592 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
597 if (objfile
->demangled_names_hash
== NULL
)
598 create_demangled_names_hash (objfile
);
600 /* The stabs reader generally provides names that are not
601 NUL-terminated; most of the other readers don't do this, so we
602 can just use the given copy, unless we're in the Java case. */
603 if (gsymbol
->language
== language_java
)
607 lookup_len
= len
+ JAVA_PREFIX_LEN
;
608 alloc_name
= alloca (lookup_len
+ 1);
609 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
610 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
611 alloc_name
[lookup_len
] = '\0';
613 lookup_name
= alloc_name
;
614 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
616 else if (linkage_name
[len
] != '\0')
621 alloc_name
= alloca (lookup_len
+ 1);
622 memcpy (alloc_name
, linkage_name
, len
);
623 alloc_name
[lookup_len
] = '\0';
625 lookup_name
= alloc_name
;
626 linkage_name_copy
= alloc_name
;
631 lookup_name
= linkage_name
;
632 linkage_name_copy
= linkage_name
;
635 entry
.mangled
= (char *) lookup_name
;
636 slot
= ((struct demangled_name_entry
**)
637 htab_find_slot (objfile
->demangled_names_hash
,
640 /* If this name is not in the hash table, add it. */
643 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
645 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
647 /* Suppose we have demangled_name==NULL, copy_name==0, and
648 lookup_name==linkage_name. In this case, we already have the
649 mangled name saved, and we don't have a demangled name. So,
650 you might think we could save a little space by not recording
651 this in the hash table at all.
653 It turns out that it is actually important to still save such
654 an entry in the hash table, because storing this name gives
655 us better bcache hit rates for partial symbols. */
656 if (!copy_name
&& lookup_name
== linkage_name
)
658 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
659 offsetof (struct demangled_name_entry
,
661 + demangled_len
+ 1);
662 (*slot
)->mangled
= (char *) lookup_name
;
666 /* If we must copy the mangled name, put it directly after
667 the demangled name so we can have a single
669 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
670 offsetof (struct demangled_name_entry
,
672 + lookup_len
+ demangled_len
+ 2);
673 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
674 strcpy ((*slot
)->mangled
, lookup_name
);
677 if (demangled_name
!= NULL
)
679 strcpy ((*slot
)->demangled
, demangled_name
);
680 xfree (demangled_name
);
683 (*slot
)->demangled
[0] = '\0';
686 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
687 if ((*slot
)->demangled
[0] != '\0')
688 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
690 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
693 /* Return the source code name of a symbol. In languages where
694 demangling is necessary, this is the demangled name. */
697 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
699 switch (gsymbol
->language
)
705 case language_fortran
:
706 if (symbol_get_demangled_name (gsymbol
) != NULL
)
707 return symbol_get_demangled_name (gsymbol
);
710 if (symbol_get_demangled_name (gsymbol
) != NULL
)
711 return symbol_get_demangled_name (gsymbol
);
713 return ada_decode_symbol (gsymbol
);
718 return gsymbol
->name
;
721 /* Return the demangled name for a symbol based on the language for
722 that symbol. If no demangled name exists, return NULL. */
724 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
726 switch (gsymbol
->language
)
732 case language_fortran
:
733 if (symbol_get_demangled_name (gsymbol
) != NULL
)
734 return symbol_get_demangled_name (gsymbol
);
737 if (symbol_get_demangled_name (gsymbol
) != NULL
)
738 return symbol_get_demangled_name (gsymbol
);
740 return ada_decode_symbol (gsymbol
);
748 /* Return the search name of a symbol---generally the demangled or
749 linkage name of the symbol, depending on how it will be searched for.
750 If there is no distinct demangled name, then returns the same value
751 (same pointer) as SYMBOL_LINKAGE_NAME. */
753 symbol_search_name (const struct general_symbol_info
*gsymbol
)
755 if (gsymbol
->language
== language_ada
)
756 return gsymbol
->name
;
758 return symbol_natural_name (gsymbol
);
761 /* Initialize the structure fields to zero values. */
763 init_sal (struct symtab_and_line
*sal
)
771 sal
->explicit_pc
= 0;
772 sal
->explicit_line
= 0;
776 /* Return 1 if the two sections are the same, or if they could
777 plausibly be copies of each other, one in an original object
778 file and another in a separated debug file. */
781 matching_obj_sections (struct obj_section
*obj_first
,
782 struct obj_section
*obj_second
)
784 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
785 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
788 /* If they're the same section, then they match. */
792 /* If either is NULL, give up. */
793 if (first
== NULL
|| second
== NULL
)
796 /* This doesn't apply to absolute symbols. */
797 if (first
->owner
== NULL
|| second
->owner
== NULL
)
800 /* If they're in the same object file, they must be different sections. */
801 if (first
->owner
== second
->owner
)
804 /* Check whether the two sections are potentially corresponding. They must
805 have the same size, address, and name. We can't compare section indexes,
806 which would be more reliable, because some sections may have been
808 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
811 /* In-memory addresses may start at a different offset, relativize them. */
812 if (bfd_get_section_vma (first
->owner
, first
)
813 - bfd_get_start_address (first
->owner
)
814 != bfd_get_section_vma (second
->owner
, second
)
815 - bfd_get_start_address (second
->owner
))
818 if (bfd_get_section_name (first
->owner
, first
) == NULL
819 || bfd_get_section_name (second
->owner
, second
) == NULL
820 || strcmp (bfd_get_section_name (first
->owner
, first
),
821 bfd_get_section_name (second
->owner
, second
)) != 0)
824 /* Otherwise check that they are in corresponding objfiles. */
827 if (obj
->obfd
== first
->owner
)
829 gdb_assert (obj
!= NULL
);
831 if (obj
->separate_debug_objfile
!= NULL
832 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
834 if (obj
->separate_debug_objfile_backlink
!= NULL
835 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
842 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
844 struct objfile
*objfile
;
845 struct minimal_symbol
*msymbol
;
847 /* If we know that this is not a text address, return failure. This is
848 necessary because we loop based on texthigh and textlow, which do
849 not include the data ranges. */
850 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
852 && (MSYMBOL_TYPE (msymbol
) == mst_data
853 || MSYMBOL_TYPE (msymbol
) == mst_bss
854 || MSYMBOL_TYPE (msymbol
) == mst_abs
855 || MSYMBOL_TYPE (msymbol
) == mst_file_data
856 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
859 ALL_OBJFILES (objfile
)
861 struct symtab
*result
= NULL
;
864 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
873 /* Debug symbols usually don't have section information. We need to dig that
874 out of the minimal symbols and stash that in the debug symbol. */
877 fixup_section (struct general_symbol_info
*ginfo
,
878 CORE_ADDR addr
, struct objfile
*objfile
)
880 struct minimal_symbol
*msym
;
882 /* First, check whether a minimal symbol with the same name exists
883 and points to the same address. The address check is required
884 e.g. on PowerPC64, where the minimal symbol for a function will
885 point to the function descriptor, while the debug symbol will
886 point to the actual function code. */
887 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
890 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
891 ginfo
->section
= SYMBOL_SECTION (msym
);
895 /* Static, function-local variables do appear in the linker
896 (minimal) symbols, but are frequently given names that won't
897 be found via lookup_minimal_symbol(). E.g., it has been
898 observed in frv-uclinux (ELF) executables that a static,
899 function-local variable named "foo" might appear in the
900 linker symbols as "foo.6" or "foo.3". Thus, there is no
901 point in attempting to extend the lookup-by-name mechanism to
902 handle this case due to the fact that there can be multiple
905 So, instead, search the section table when lookup by name has
906 failed. The ``addr'' and ``endaddr'' fields may have already
907 been relocated. If so, the relocation offset (i.e. the
908 ANOFFSET value) needs to be subtracted from these values when
909 performing the comparison. We unconditionally subtract it,
910 because, when no relocation has been performed, the ANOFFSET
911 value will simply be zero.
913 The address of the symbol whose section we're fixing up HAS
914 NOT BEEN adjusted (relocated) yet. It can't have been since
915 the section isn't yet known and knowing the section is
916 necessary in order to add the correct relocation value. In
917 other words, we wouldn't even be in this function (attempting
918 to compute the section) if it were already known.
920 Note that it is possible to search the minimal symbols
921 (subtracting the relocation value if necessary) to find the
922 matching minimal symbol, but this is overkill and much less
923 efficient. It is not necessary to find the matching minimal
924 symbol, only its section.
926 Note that this technique (of doing a section table search)
927 can fail when unrelocated section addresses overlap. For
928 this reason, we still attempt a lookup by name prior to doing
929 a search of the section table. */
931 struct obj_section
*s
;
933 ALL_OBJFILE_OSECTIONS (objfile
, s
)
935 int idx
= s
->the_bfd_section
->index
;
936 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
938 if (obj_section_addr (s
) - offset
<= addr
939 && addr
< obj_section_endaddr (s
) - offset
)
941 ginfo
->obj_section
= s
;
942 ginfo
->section
= idx
;
950 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
957 if (SYMBOL_OBJ_SECTION (sym
))
960 /* We either have an OBJFILE, or we can get at it from the sym's
961 symtab. Anything else is a bug. */
962 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
965 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
967 /* We should have an objfile by now. */
968 gdb_assert (objfile
);
970 switch (SYMBOL_CLASS (sym
))
974 addr
= SYMBOL_VALUE_ADDRESS (sym
);
977 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
981 /* Nothing else will be listed in the minsyms -- no use looking
986 fixup_section (&sym
->ginfo
, addr
, objfile
);
991 /* Find the definition for a specified symbol name NAME
992 in domain DOMAIN, visible from lexical block BLOCK.
993 Returns the struct symbol pointer, or zero if no symbol is found.
994 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
995 NAME is a field of the current implied argument `this'. If so set
996 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
997 BLOCK_FOUND is set to the block in which NAME is found (in the case of
998 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1000 /* This function has a bunch of loops in it and it would seem to be
1001 attractive to put in some QUIT's (though I'm not really sure
1002 whether it can run long enough to be really important). But there
1003 are a few calls for which it would appear to be bad news to quit
1004 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1005 that there is C++ code below which can error(), but that probably
1006 doesn't affect these calls since they are looking for a known
1007 variable and thus can probably assume it will never hit the C++
1011 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1012 const domain_enum domain
, enum language lang
,
1013 int *is_a_field_of_this
)
1015 char *demangled_name
= NULL
;
1016 const char *modified_name
= NULL
;
1017 struct symbol
*returnval
;
1018 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1020 modified_name
= name
;
1022 /* If we are using C++, D, or Java, demangle the name before doing a
1023 lookup, so we can always binary search. */
1024 if (lang
== language_cplus
)
1026 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1029 modified_name
= demangled_name
;
1030 make_cleanup (xfree
, demangled_name
);
1034 /* If we were given a non-mangled name, canonicalize it
1035 according to the language (so far only for C++). */
1036 demangled_name
= cp_canonicalize_string (name
);
1039 modified_name
= demangled_name
;
1040 make_cleanup (xfree
, demangled_name
);
1044 else if (lang
== language_java
)
1046 demangled_name
= cplus_demangle (name
,
1047 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1050 modified_name
= demangled_name
;
1051 make_cleanup (xfree
, demangled_name
);
1054 else if (lang
== language_d
)
1056 demangled_name
= d_demangle (name
, 0);
1059 modified_name
= demangled_name
;
1060 make_cleanup (xfree
, demangled_name
);
1064 if (case_sensitivity
== case_sensitive_off
)
1069 len
= strlen (name
);
1070 copy
= (char *) alloca (len
+ 1);
1071 for (i
= 0; i
< len
; i
++)
1072 copy
[i
] = tolower (name
[i
]);
1074 modified_name
= copy
;
1077 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1078 is_a_field_of_this
);
1079 do_cleanups (cleanup
);
1084 /* Behave like lookup_symbol_in_language, but performed with the
1085 current language. */
1088 lookup_symbol (const char *name
, const struct block
*block
,
1089 domain_enum domain
, int *is_a_field_of_this
)
1091 return lookup_symbol_in_language (name
, block
, domain
,
1092 current_language
->la_language
,
1093 is_a_field_of_this
);
1096 /* Behave like lookup_symbol except that NAME is the natural name
1097 of the symbol that we're looking for and, if LINKAGE_NAME is
1098 non-NULL, ensure that the symbol's linkage name matches as
1101 static struct symbol
*
1102 lookup_symbol_aux (const char *name
, const struct block
*block
,
1103 const domain_enum domain
, enum language language
,
1104 int *is_a_field_of_this
)
1107 const struct language_defn
*langdef
;
1109 /* Make sure we do something sensible with is_a_field_of_this, since
1110 the callers that set this parameter to some non-null value will
1111 certainly use it later and expect it to be either 0 or 1.
1112 If we don't set it, the contents of is_a_field_of_this are
1114 if (is_a_field_of_this
!= NULL
)
1115 *is_a_field_of_this
= 0;
1117 /* Search specified block and its superiors. Don't search
1118 STATIC_BLOCK or GLOBAL_BLOCK. */
1120 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1124 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1125 check to see if NAME is a field of `this'. */
1127 langdef
= language_def (language
);
1129 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1132 struct symbol
*sym
= NULL
;
1133 const struct block
*function_block
= block
;
1135 /* 'this' is only defined in the function's block, so find the
1136 enclosing function block. */
1137 for (; function_block
&& !BLOCK_FUNCTION (function_block
);
1138 function_block
= BLOCK_SUPERBLOCK (function_block
));
1140 if (function_block
&& !dict_empty (BLOCK_DICT (function_block
)))
1141 sym
= lookup_block_symbol (function_block
, langdef
->la_name_of_this
,
1145 struct type
*t
= sym
->type
;
1147 /* I'm not really sure that type of this can ever
1148 be typedefed; just be safe. */
1150 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1151 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1152 t
= TYPE_TARGET_TYPE (t
);
1154 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1155 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1156 error (_("Internal error: `%s' is not an aggregate"),
1157 langdef
->la_name_of_this
);
1159 if (check_field (t
, name
))
1161 *is_a_field_of_this
= 1;
1167 /* Now do whatever is appropriate for LANGUAGE to look
1168 up static and global variables. */
1170 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1174 /* Now search all static file-level symbols. Not strictly correct,
1175 but more useful than an error. */
1177 return lookup_static_symbol_aux (name
, domain
);
1180 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1181 first, then check the psymtabs. If a psymtab indicates the existence of the
1182 desired name as a file-level static, then do psymtab-to-symtab conversion on
1183 the fly and return the found symbol. */
1186 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1188 struct objfile
*objfile
;
1191 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1195 ALL_OBJFILES (objfile
)
1197 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1205 /* Check to see if the symbol is defined in BLOCK or its superiors.
1206 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1208 static struct symbol
*
1209 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1210 const domain_enum domain
,
1211 enum language language
)
1214 const struct block
*static_block
= block_static_block (block
);
1215 const char *scope
= block_scope (block
);
1217 /* Check if either no block is specified or it's a global block. */
1219 if (static_block
== NULL
)
1222 while (block
!= static_block
)
1224 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1228 if (language
== language_cplus
|| language
== language_fortran
)
1230 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1236 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1238 block
= BLOCK_SUPERBLOCK (block
);
1241 /* We've reached the edge of the function without finding a result. */
1246 /* Look up OBJFILE to BLOCK. */
1249 lookup_objfile_from_block (const struct block
*block
)
1251 struct objfile
*obj
;
1257 block
= block_global_block (block
);
1258 /* Go through SYMTABS. */
1259 ALL_SYMTABS (obj
, s
)
1260 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1262 if (obj
->separate_debug_objfile_backlink
)
1263 obj
= obj
->separate_debug_objfile_backlink
;
1271 /* Look up a symbol in a block; if found, fixup the symbol, and set
1272 block_found appropriately. */
1275 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1276 const domain_enum domain
)
1280 sym
= lookup_block_symbol (block
, name
, domain
);
1283 block_found
= block
;
1284 return fixup_symbol_section (sym
, NULL
);
1290 /* Check all global symbols in OBJFILE in symtabs and
1294 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1296 const domain_enum domain
)
1298 const struct objfile
*objfile
;
1300 struct blockvector
*bv
;
1301 const struct block
*block
;
1304 for (objfile
= main_objfile
;
1306 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1308 /* Go through symtabs. */
1309 ALL_OBJFILE_SYMTABS (objfile
, s
)
1311 bv
= BLOCKVECTOR (s
);
1312 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1313 sym
= lookup_block_symbol (block
, name
, domain
);
1316 block_found
= block
;
1317 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1321 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1330 /* Check to see if the symbol is defined in one of the symtabs.
1331 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1332 depending on whether or not we want to search global symbols or
1335 static struct symbol
*
1336 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1337 const domain_enum domain
)
1340 struct objfile
*objfile
;
1341 struct blockvector
*bv
;
1342 const struct block
*block
;
1345 ALL_OBJFILES (objfile
)
1348 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1352 ALL_OBJFILE_SYMTABS (objfile
, s
)
1355 bv
= BLOCKVECTOR (s
);
1356 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1357 sym
= lookup_block_symbol (block
, name
, domain
);
1360 block_found
= block
;
1361 return fixup_symbol_section (sym
, objfile
);
1369 /* A helper function for lookup_symbol_aux that interfaces with the
1370 "quick" symbol table functions. */
1372 static struct symbol
*
1373 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1374 const char *name
, const domain_enum domain
)
1376 struct symtab
*symtab
;
1377 struct blockvector
*bv
;
1378 const struct block
*block
;
1383 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1387 bv
= BLOCKVECTOR (symtab
);
1388 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1389 sym
= lookup_block_symbol (block
, name
, domain
);
1392 /* This shouldn't be necessary, but as a last resort try
1393 looking in the statics even though the psymtab claimed
1394 the symbol was global, or vice-versa. It's possible
1395 that the psymtab gets it wrong in some cases. */
1397 /* FIXME: carlton/2002-09-30: Should we really do that?
1398 If that happens, isn't it likely to be a GDB error, in
1399 which case we should fix the GDB error rather than
1400 silently dealing with it here? So I'd vote for
1401 removing the check for the symbol in the other
1403 block
= BLOCKVECTOR_BLOCK (bv
,
1404 kind
== GLOBAL_BLOCK
?
1405 STATIC_BLOCK
: GLOBAL_BLOCK
);
1406 sym
= lookup_block_symbol (block
, name
, domain
);
1408 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>)."),
1409 kind
== GLOBAL_BLOCK
? "global" : "static",
1410 name
, symtab
->filename
, name
, name
);
1412 return fixup_symbol_section (sym
, objfile
);
1415 /* A default version of lookup_symbol_nonlocal for use by languages
1416 that can't think of anything better to do. This implements the C
1420 basic_lookup_symbol_nonlocal (const char *name
,
1421 const struct block
*block
,
1422 const domain_enum domain
)
1426 /* NOTE: carlton/2003-05-19: The comments below were written when
1427 this (or what turned into this) was part of lookup_symbol_aux;
1428 I'm much less worried about these questions now, since these
1429 decisions have turned out well, but I leave these comments here
1432 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1433 not it would be appropriate to search the current global block
1434 here as well. (That's what this code used to do before the
1435 is_a_field_of_this check was moved up.) On the one hand, it's
1436 redundant with the lookup_symbol_aux_symtabs search that happens
1437 next. On the other hand, if decode_line_1 is passed an argument
1438 like filename:var, then the user presumably wants 'var' to be
1439 searched for in filename. On the third hand, there shouldn't be
1440 multiple global variables all of which are named 'var', and it's
1441 not like decode_line_1 has ever restricted its search to only
1442 global variables in a single filename. All in all, only
1443 searching the static block here seems best: it's correct and it's
1446 /* NOTE: carlton/2002-12-05: There's also a possible performance
1447 issue here: if you usually search for global symbols in the
1448 current file, then it would be slightly better to search the
1449 current global block before searching all the symtabs. But there
1450 are other factors that have a much greater effect on performance
1451 than that one, so I don't think we should worry about that for
1454 sym
= lookup_symbol_static (name
, block
, domain
);
1458 return lookup_symbol_global (name
, block
, domain
);
1461 /* Lookup a symbol in the static block associated to BLOCK, if there
1462 is one; do nothing if BLOCK is NULL or a global block. */
1465 lookup_symbol_static (const char *name
,
1466 const struct block
*block
,
1467 const domain_enum domain
)
1469 const struct block
*static_block
= block_static_block (block
);
1471 if (static_block
!= NULL
)
1472 return lookup_symbol_aux_block (name
, static_block
, domain
);
1477 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1481 lookup_symbol_global (const char *name
,
1482 const struct block
*block
,
1483 const domain_enum domain
)
1485 struct symbol
*sym
= NULL
;
1486 struct objfile
*objfile
= NULL
;
1488 /* Call library-specific lookup procedure. */
1489 objfile
= lookup_objfile_from_block (block
);
1490 if (objfile
!= NULL
)
1491 sym
= solib_global_lookup (objfile
, name
, domain
);
1495 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, domain
);
1499 ALL_OBJFILES (objfile
)
1501 sym
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
, name
, domain
);
1510 symbol_matches_domain (enum language symbol_language
,
1511 domain_enum symbol_domain
,
1514 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1515 A Java class declaration also defines a typedef for the class.
1516 Similarly, any Ada type declaration implicitly defines a typedef. */
1517 if (symbol_language
== language_cplus
1518 || symbol_language
== language_d
1519 || symbol_language
== language_java
1520 || symbol_language
== language_ada
)
1522 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1523 && symbol_domain
== STRUCT_DOMAIN
)
1526 /* For all other languages, strict match is required. */
1527 return (symbol_domain
== domain
);
1530 /* Look up a type named NAME in the struct_domain. The type returned
1531 must not be opaque -- i.e., must have at least one field
1535 lookup_transparent_type (const char *name
)
1537 return current_language
->la_lookup_transparent_type (name
);
1540 /* A helper for basic_lookup_transparent_type that interfaces with the
1541 "quick" symbol table functions. */
1543 static struct type
*
1544 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1547 struct symtab
*symtab
;
1548 struct blockvector
*bv
;
1549 struct block
*block
;
1554 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1558 bv
= BLOCKVECTOR (symtab
);
1559 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1560 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1563 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1565 /* This shouldn't be necessary, but as a last resort
1566 * try looking in the 'other kind' even though the psymtab
1567 * claimed the symbol was one thing. It's possible that
1568 * the psymtab gets it wrong in some cases.
1570 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1571 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1573 /* FIXME; error is wrong in one case */
1574 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1575 %s may be an inlined function, or may be a template function\n\
1576 (if a template, try specifying an instantiation: %s<type>)."),
1577 name
, symtab
->filename
, name
, name
);
1579 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1580 return SYMBOL_TYPE (sym
);
1585 /* The standard implementation of lookup_transparent_type. This code
1586 was modeled on lookup_symbol -- the parts not relevant to looking
1587 up types were just left out. In particular it's assumed here that
1588 types are available in struct_domain and only at file-static or
1592 basic_lookup_transparent_type (const char *name
)
1595 struct symtab
*s
= NULL
;
1596 struct blockvector
*bv
;
1597 struct objfile
*objfile
;
1598 struct block
*block
;
1601 /* Now search all the global symbols. Do the symtab's first, then
1602 check the psymtab's. If a psymtab indicates the existence
1603 of the desired name as a global, then do psymtab-to-symtab
1604 conversion on the fly and return the found symbol. */
1606 ALL_OBJFILES (objfile
)
1609 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1611 name
, STRUCT_DOMAIN
);
1613 ALL_OBJFILE_SYMTABS (objfile
, s
)
1616 bv
= BLOCKVECTOR (s
);
1617 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1618 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1619 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1621 return SYMBOL_TYPE (sym
);
1626 ALL_OBJFILES (objfile
)
1628 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1633 /* Now search the static file-level symbols.
1634 Not strictly correct, but more useful than an error.
1635 Do the symtab's first, then
1636 check the psymtab's. If a psymtab indicates the existence
1637 of the desired name as a file-level static, then do psymtab-to-symtab
1638 conversion on the fly and return the found symbol.
1641 ALL_OBJFILES (objfile
)
1644 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, STATIC_BLOCK
,
1645 name
, STRUCT_DOMAIN
);
1647 ALL_OBJFILE_SYMTABS (objfile
, s
)
1649 bv
= BLOCKVECTOR (s
);
1650 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1651 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1652 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1654 return SYMBOL_TYPE (sym
);
1659 ALL_OBJFILES (objfile
)
1661 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1666 return (struct type
*) 0;
1670 /* Find the name of the file containing main(). */
1671 /* FIXME: What about languages without main() or specially linked
1672 executables that have no main() ? */
1675 find_main_filename (void)
1677 struct objfile
*objfile
;
1678 char *name
= main_name ();
1680 ALL_OBJFILES (objfile
)
1686 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1693 /* Search BLOCK for symbol NAME in DOMAIN.
1695 Note that if NAME is the demangled form of a C++ symbol, we will fail
1696 to find a match during the binary search of the non-encoded names, but
1697 for now we don't worry about the slight inefficiency of looking for
1698 a match we'll never find, since it will go pretty quick. Once the
1699 binary search terminates, we drop through and do a straight linear
1700 search on the symbols. Each symbol which is marked as being a ObjC/C++
1701 symbol (language_cplus or language_objc set) has both the encoded and
1702 non-encoded names tested for a match.
1706 lookup_block_symbol (const struct block
*block
, const char *name
,
1707 const domain_enum domain
)
1709 struct dict_iterator iter
;
1712 if (!BLOCK_FUNCTION (block
))
1714 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1716 sym
= dict_iter_name_next (name
, &iter
))
1718 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1719 SYMBOL_DOMAIN (sym
), domain
))
1726 /* Note that parameter symbols do not always show up last in the
1727 list; this loop makes sure to take anything else other than
1728 parameter symbols first; it only uses parameter symbols as a
1729 last resort. Note that this only takes up extra computation
1732 struct symbol
*sym_found
= NULL
;
1734 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1736 sym
= dict_iter_name_next (name
, &iter
))
1738 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1739 SYMBOL_DOMAIN (sym
), domain
))
1742 if (!SYMBOL_IS_ARGUMENT (sym
))
1748 return (sym_found
); /* Will be NULL if not found. */
1752 /* Find the symtab associated with PC and SECTION. Look through the
1753 psymtabs and read in another symtab if necessary. */
1756 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
1759 struct blockvector
*bv
;
1760 struct symtab
*s
= NULL
;
1761 struct symtab
*best_s
= NULL
;
1762 struct objfile
*objfile
;
1763 struct program_space
*pspace
;
1764 CORE_ADDR distance
= 0;
1765 struct minimal_symbol
*msymbol
;
1767 pspace
= current_program_space
;
1769 /* If we know that this is not a text address, return failure. This is
1770 necessary because we loop based on the block's high and low code
1771 addresses, which do not include the data ranges, and because
1772 we call find_pc_sect_psymtab which has a similar restriction based
1773 on the partial_symtab's texthigh and textlow. */
1774 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1776 && (MSYMBOL_TYPE (msymbol
) == mst_data
1777 || MSYMBOL_TYPE (msymbol
) == mst_bss
1778 || MSYMBOL_TYPE (msymbol
) == mst_abs
1779 || MSYMBOL_TYPE (msymbol
) == mst_file_data
1780 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
1783 /* Search all symtabs for the one whose file contains our address, and which
1784 is the smallest of all the ones containing the address. This is designed
1785 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1786 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1787 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1789 This happens for native ecoff format, where code from included files
1790 gets its own symtab. The symtab for the included file should have
1791 been read in already via the dependency mechanism.
1792 It might be swifter to create several symtabs with the same name
1793 like xcoff does (I'm not sure).
1795 It also happens for objfiles that have their functions reordered.
1796 For these, the symtab we are looking for is not necessarily read in. */
1798 ALL_PRIMARY_SYMTABS (objfile
, s
)
1800 bv
= BLOCKVECTOR (s
);
1801 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1803 if (BLOCK_START (b
) <= pc
1804 && BLOCK_END (b
) > pc
1806 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
1808 /* For an objfile that has its functions reordered,
1809 find_pc_psymtab will find the proper partial symbol table
1810 and we simply return its corresponding symtab. */
1811 /* In order to better support objfiles that contain both
1812 stabs and coff debugging info, we continue on if a psymtab
1814 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
1816 struct symtab
*result
;
1819 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1828 struct dict_iterator iter
;
1829 struct symbol
*sym
= NULL
;
1831 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1833 fixup_symbol_section (sym
, objfile
);
1834 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
1838 continue; /* no symbol in this symtab matches section */
1840 distance
= BLOCK_END (b
) - BLOCK_START (b
);
1848 ALL_OBJFILES (objfile
)
1850 struct symtab
*result
;
1854 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1865 /* Find the symtab associated with PC. Look through the psymtabs and
1866 read in another symtab if necessary. Backward compatibility, no section */
1869 find_pc_symtab (CORE_ADDR pc
)
1871 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
1875 /* Find the source file and line number for a given PC value and SECTION.
1876 Return a structure containing a symtab pointer, a line number,
1877 and a pc range for the entire source line.
1878 The value's .pc field is NOT the specified pc.
1879 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1880 use the line that ends there. Otherwise, in that case, the line
1881 that begins there is used. */
1883 /* The big complication here is that a line may start in one file, and end just
1884 before the start of another file. This usually occurs when you #include
1885 code in the middle of a subroutine. To properly find the end of a line's PC
1886 range, we must search all symtabs associated with this compilation unit, and
1887 find the one whose first PC is closer than that of the next line in this
1890 /* If it's worth the effort, we could be using a binary search. */
1892 struct symtab_and_line
1893 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
1896 struct linetable
*l
;
1899 struct linetable_entry
*item
;
1900 struct symtab_and_line val
;
1901 struct blockvector
*bv
;
1902 struct minimal_symbol
*msymbol
;
1903 struct minimal_symbol
*mfunsym
;
1905 /* Info on best line seen so far, and where it starts, and its file. */
1907 struct linetable_entry
*best
= NULL
;
1908 CORE_ADDR best_end
= 0;
1909 struct symtab
*best_symtab
= 0;
1911 /* Store here the first line number
1912 of a file which contains the line at the smallest pc after PC.
1913 If we don't find a line whose range contains PC,
1914 we will use a line one less than this,
1915 with a range from the start of that file to the first line's pc. */
1916 struct linetable_entry
*alt
= NULL
;
1917 struct symtab
*alt_symtab
= 0;
1919 /* Info on best line seen in this file. */
1921 struct linetable_entry
*prev
;
1923 /* If this pc is not from the current frame,
1924 it is the address of the end of a call instruction.
1925 Quite likely that is the start of the following statement.
1926 But what we want is the statement containing the instruction.
1927 Fudge the pc to make sure we get that. */
1929 init_sal (&val
); /* initialize to zeroes */
1931 val
.pspace
= current_program_space
;
1933 /* It's tempting to assume that, if we can't find debugging info for
1934 any function enclosing PC, that we shouldn't search for line
1935 number info, either. However, GAS can emit line number info for
1936 assembly files --- very helpful when debugging hand-written
1937 assembly code. In such a case, we'd have no debug info for the
1938 function, but we would have line info. */
1943 /* elz: added this because this function returned the wrong
1944 information if the pc belongs to a stub (import/export)
1945 to call a shlib function. This stub would be anywhere between
1946 two functions in the target, and the line info was erroneously
1947 taken to be the one of the line before the pc.
1949 /* RT: Further explanation:
1951 * We have stubs (trampolines) inserted between procedures.
1953 * Example: "shr1" exists in a shared library, and a "shr1" stub also
1954 * exists in the main image.
1956 * In the minimal symbol table, we have a bunch of symbols
1957 * sorted by start address. The stubs are marked as "trampoline",
1958 * the others appear as text. E.g.:
1960 * Minimal symbol table for main image
1961 * main: code for main (text symbol)
1962 * shr1: stub (trampoline symbol)
1963 * foo: code for foo (text symbol)
1965 * Minimal symbol table for "shr1" image:
1967 * shr1: code for shr1 (text symbol)
1970 * So the code below is trying to detect if we are in the stub
1971 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
1972 * and if found, do the symbolization from the real-code address
1973 * rather than the stub address.
1975 * Assumptions being made about the minimal symbol table:
1976 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
1977 * if we're really in the trampoline. If we're beyond it (say
1978 * we're in "foo" in the above example), it'll have a closer
1979 * symbol (the "foo" text symbol for example) and will not
1980 * return the trampoline.
1981 * 2. lookup_minimal_symbol_text() will find a real text symbol
1982 * corresponding to the trampoline, and whose address will
1983 * be different than the trampoline address. I put in a sanity
1984 * check for the address being the same, to avoid an
1985 * infinite recursion.
1987 msymbol
= lookup_minimal_symbol_by_pc (pc
);
1988 if (msymbol
!= NULL
)
1989 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
1991 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
1993 if (mfunsym
== NULL
)
1994 /* I eliminated this warning since it is coming out
1995 * in the following situation:
1996 * gdb shmain // test program with shared libraries
1997 * (gdb) break shr1 // function in shared lib
1998 * Warning: In stub for ...
1999 * In the above situation, the shared lib is not loaded yet,
2000 * so of course we can't find the real func/line info,
2001 * but the "break" still works, and the warning is annoying.
2002 * So I commented out the warning. RT */
2003 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2005 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
2006 /* Avoid infinite recursion */
2007 /* See above comment about why warning is commented out */
2008 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2011 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2015 s
= find_pc_sect_symtab (pc
, section
);
2018 /* if no symbol information, return previous pc */
2025 bv
= BLOCKVECTOR (s
);
2027 /* Look at all the symtabs that share this blockvector.
2028 They all have the same apriori range, that we found was right;
2029 but they have different line tables. */
2031 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2033 /* Find the best line in this symtab. */
2040 /* I think len can be zero if the symtab lacks line numbers
2041 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2042 I'm not sure which, and maybe it depends on the symbol
2048 item
= l
->item
; /* Get first line info */
2050 /* Is this file's first line closer than the first lines of other files?
2051 If so, record this file, and its first line, as best alternate. */
2052 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2058 for (i
= 0; i
< len
; i
++, item
++)
2060 /* Leave prev pointing to the linetable entry for the last line
2061 that started at or before PC. */
2068 /* At this point, prev points at the line whose start addr is <= pc, and
2069 item points at the next line. If we ran off the end of the linetable
2070 (pc >= start of the last line), then prev == item. If pc < start of
2071 the first line, prev will not be set. */
2073 /* Is this file's best line closer than the best in the other files?
2074 If so, record this file, and its best line, as best so far. Don't
2075 save prev if it represents the end of a function (i.e. line number
2076 0) instead of a real line. */
2078 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2083 /* Discard BEST_END if it's before the PC of the current BEST. */
2084 if (best_end
<= best
->pc
)
2088 /* If another line (denoted by ITEM) is in the linetable and its
2089 PC is after BEST's PC, but before the current BEST_END, then
2090 use ITEM's PC as the new best_end. */
2091 if (best
&& i
< len
&& item
->pc
> best
->pc
2092 && (best_end
== 0 || best_end
> item
->pc
))
2093 best_end
= item
->pc
;
2098 /* If we didn't find any line number info, just return zeros.
2099 We used to return alt->line - 1 here, but that could be
2100 anywhere; if we don't have line number info for this PC,
2101 don't make some up. */
2104 else if (best
->line
== 0)
2106 /* If our best fit is in a range of PC's for which no line
2107 number info is available (line number is zero) then we didn't
2108 find any valid line information. */
2113 val
.symtab
= best_symtab
;
2114 val
.line
= best
->line
;
2116 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2121 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2123 val
.section
= section
;
2127 /* Backward compatibility (no section) */
2129 struct symtab_and_line
2130 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2132 struct obj_section
*section
;
2134 section
= find_pc_overlay (pc
);
2135 if (pc_in_unmapped_range (pc
, section
))
2136 pc
= overlay_mapped_address (pc
, section
);
2137 return find_pc_sect_line (pc
, section
, notcurrent
);
2140 /* Find line number LINE in any symtab whose name is the same as
2143 If found, return the symtab that contains the linetable in which it was
2144 found, set *INDEX to the index in the linetable of the best entry
2145 found, and set *EXACT_MATCH nonzero if the value returned is an
2148 If not found, return NULL. */
2151 find_line_symtab (struct symtab
*symtab
, int line
,
2152 int *index
, int *exact_match
)
2154 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2156 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2160 struct linetable
*best_linetable
;
2161 struct symtab
*best_symtab
;
2163 /* First try looking it up in the given symtab. */
2164 best_linetable
= LINETABLE (symtab
);
2165 best_symtab
= symtab
;
2166 best_index
= find_line_common (best_linetable
, line
, &exact
);
2167 if (best_index
< 0 || !exact
)
2169 /* Didn't find an exact match. So we better keep looking for
2170 another symtab with the same name. In the case of xcoff,
2171 multiple csects for one source file (produced by IBM's FORTRAN
2172 compiler) produce multiple symtabs (this is unavoidable
2173 assuming csects can be at arbitrary places in memory and that
2174 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2176 /* BEST is the smallest linenumber > LINE so far seen,
2177 or 0 if none has been seen so far.
2178 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2181 struct objfile
*objfile
;
2184 if (best_index
>= 0)
2185 best
= best_linetable
->item
[best_index
].line
;
2189 ALL_OBJFILES (objfile
)
2192 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2196 /* Get symbol full file name if possible. */
2197 symtab_to_fullname (symtab
);
2199 ALL_SYMTABS (objfile
, s
)
2201 struct linetable
*l
;
2204 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2206 if (symtab
->fullname
!= NULL
2207 && symtab_to_fullname (s
) != NULL
2208 && FILENAME_CMP (symtab
->fullname
, s
->fullname
) != 0)
2211 ind
= find_line_common (l
, line
, &exact
);
2221 if (best
== 0 || l
->item
[ind
].line
< best
)
2223 best
= l
->item
[ind
].line
;
2236 *index
= best_index
;
2238 *exact_match
= exact
;
2243 /* Set the PC value for a given source file and line number and return true.
2244 Returns zero for invalid line number (and sets the PC to 0).
2245 The source file is specified with a struct symtab. */
2248 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2250 struct linetable
*l
;
2257 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2260 l
= LINETABLE (symtab
);
2261 *pc
= l
->item
[ind
].pc
;
2268 /* Find the range of pc values in a line.
2269 Store the starting pc of the line into *STARTPTR
2270 and the ending pc (start of next line) into *ENDPTR.
2271 Returns 1 to indicate success.
2272 Returns 0 if could not find the specified line. */
2275 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2278 CORE_ADDR startaddr
;
2279 struct symtab_and_line found_sal
;
2282 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2285 /* This whole function is based on address. For example, if line 10 has
2286 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2287 "info line *0x123" should say the line goes from 0x100 to 0x200
2288 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2289 This also insures that we never give a range like "starts at 0x134
2290 and ends at 0x12c". */
2292 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2293 if (found_sal
.line
!= sal
.line
)
2295 /* The specified line (sal) has zero bytes. */
2296 *startptr
= found_sal
.pc
;
2297 *endptr
= found_sal
.pc
;
2301 *startptr
= found_sal
.pc
;
2302 *endptr
= found_sal
.end
;
2307 /* Given a line table and a line number, return the index into the line
2308 table for the pc of the nearest line whose number is >= the specified one.
2309 Return -1 if none is found. The value is >= 0 if it is an index.
2311 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2314 find_line_common (struct linetable
*l
, int lineno
,
2320 /* BEST is the smallest linenumber > LINENO so far seen,
2321 or 0 if none has been seen so far.
2322 BEST_INDEX identifies the item for it. */
2324 int best_index
= -1;
2335 for (i
= 0; i
< len
; i
++)
2337 struct linetable_entry
*item
= &(l
->item
[i
]);
2339 if (item
->line
== lineno
)
2341 /* Return the first (lowest address) entry which matches. */
2346 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2353 /* If we got here, we didn't get an exact match. */
2358 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2360 struct symtab_and_line sal
;
2362 sal
= find_pc_line (pc
, 0);
2365 return sal
.symtab
!= 0;
2368 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2369 address for that function that has an entry in SYMTAB's line info
2370 table. If such an entry cannot be found, return FUNC_ADDR
2373 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2375 CORE_ADDR func_start
, func_end
;
2376 struct linetable
*l
;
2379 /* Give up if this symbol has no lineinfo table. */
2380 l
= LINETABLE (symtab
);
2384 /* Get the range for the function's PC values, or give up if we
2385 cannot, for some reason. */
2386 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2389 /* Linetable entries are ordered by PC values, see the commentary in
2390 symtab.h where `struct linetable' is defined. Thus, the first
2391 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2392 address we are looking for. */
2393 for (i
= 0; i
< l
->nitems
; i
++)
2395 struct linetable_entry
*item
= &(l
->item
[i
]);
2397 /* Don't use line numbers of zero, they mark special entries in
2398 the table. See the commentary on symtab.h before the
2399 definition of struct linetable. */
2400 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2407 /* Given a function symbol SYM, find the symtab and line for the start
2409 If the argument FUNFIRSTLINE is nonzero, we want the first line
2410 of real code inside the function. */
2412 struct symtab_and_line
2413 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2415 struct symtab_and_line sal
;
2417 fixup_symbol_section (sym
, NULL
);
2418 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2419 SYMBOL_OBJ_SECTION (sym
), 0);
2421 /* We always should have a line for the function start address.
2422 If we don't, something is odd. Create a plain SAL refering
2423 just the PC and hope that skip_prologue_sal (if requested)
2424 can find a line number for after the prologue. */
2425 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2428 sal
.pspace
= current_program_space
;
2429 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2430 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2434 skip_prologue_sal (&sal
);
2439 /* Adjust SAL to the first instruction past the function prologue.
2440 If the PC was explicitly specified, the SAL is not changed.
2441 If the line number was explicitly specified, at most the SAL's PC
2442 is updated. If SAL is already past the prologue, then do nothing. */
2444 skip_prologue_sal (struct symtab_and_line
*sal
)
2447 struct symtab_and_line start_sal
;
2448 struct cleanup
*old_chain
;
2450 struct obj_section
*section
;
2452 struct objfile
*objfile
;
2453 struct gdbarch
*gdbarch
;
2454 struct block
*b
, *function_block
;
2456 /* Do not change the SAL is PC was specified explicitly. */
2457 if (sal
->explicit_pc
)
2460 old_chain
= save_current_space_and_thread ();
2461 switch_to_program_space_and_thread (sal
->pspace
);
2463 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2466 fixup_symbol_section (sym
, NULL
);
2468 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2469 section
= SYMBOL_OBJ_SECTION (sym
);
2470 name
= SYMBOL_LINKAGE_NAME (sym
);
2471 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2475 struct minimal_symbol
*msymbol
2476 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2478 if (msymbol
== NULL
)
2480 do_cleanups (old_chain
);
2484 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2485 section
= SYMBOL_OBJ_SECTION (msymbol
);
2486 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2487 objfile
= msymbol_objfile (msymbol
);
2490 gdbarch
= get_objfile_arch (objfile
);
2492 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2493 so that gdbarch_skip_prologue has something unique to work on. */
2494 if (section_is_overlay (section
) && !section_is_mapped (section
))
2495 pc
= overlay_unmapped_address (pc
, section
);
2497 /* Skip "first line" of function (which is actually its prologue). */
2498 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2499 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2501 /* For overlays, map pc back into its mapped VMA range. */
2502 pc
= overlay_mapped_address (pc
, section
);
2504 /* Calculate line number. */
2505 start_sal
= find_pc_sect_line (pc
, section
, 0);
2507 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2508 line is still part of the same function. */
2509 if (start_sal
.pc
!= pc
2510 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2511 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2512 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2513 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2515 /* First pc of next line */
2517 /* Recalculate the line number (might not be N+1). */
2518 start_sal
= find_pc_sect_line (pc
, section
, 0);
2521 /* On targets with executable formats that don't have a concept of
2522 constructors (ELF with .init has, PE doesn't), gcc emits a call
2523 to `__main' in `main' between the prologue and before user
2525 if (gdbarch_skip_main_prologue_p (gdbarch
)
2526 && name
&& strcmp (name
, "main") == 0)
2528 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2529 /* Recalculate the line number (might not be N+1). */
2530 start_sal
= find_pc_sect_line (pc
, section
, 0);
2533 /* If we still don't have a valid source line, try to find the first
2534 PC in the lineinfo table that belongs to the same function. This
2535 happens with COFF debug info, which does not seem to have an
2536 entry in lineinfo table for the code after the prologue which has
2537 no direct relation to source. For example, this was found to be
2538 the case with the DJGPP target using "gcc -gcoff" when the
2539 compiler inserted code after the prologue to make sure the stack
2541 if (sym
&& start_sal
.symtab
== NULL
)
2543 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2544 /* Recalculate the line number. */
2545 start_sal
= find_pc_sect_line (pc
, section
, 0);
2548 do_cleanups (old_chain
);
2550 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2551 forward SAL to the end of the prologue. */
2556 sal
->section
= section
;
2558 /* Unless the explicit_line flag was set, update the SAL line
2559 and symtab to correspond to the modified PC location. */
2560 if (sal
->explicit_line
)
2563 sal
->symtab
= start_sal
.symtab
;
2564 sal
->line
= start_sal
.line
;
2565 sal
->end
= start_sal
.end
;
2567 /* Check if we are now inside an inlined function. If we can,
2568 use the call site of the function instead. */
2569 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2570 function_block
= NULL
;
2573 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2575 else if (BLOCK_FUNCTION (b
) != NULL
)
2577 b
= BLOCK_SUPERBLOCK (b
);
2579 if (function_block
!= NULL
2580 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2582 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2583 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2587 /* If P is of the form "operator[ \t]+..." where `...' is
2588 some legitimate operator text, return a pointer to the
2589 beginning of the substring of the operator text.
2590 Otherwise, return "". */
2592 operator_chars (char *p
, char **end
)
2595 if (strncmp (p
, "operator", 8))
2599 /* Don't get faked out by `operator' being part of a longer
2601 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2604 /* Allow some whitespace between `operator' and the operator symbol. */
2605 while (*p
== ' ' || *p
== '\t')
2608 /* Recognize 'operator TYPENAME'. */
2610 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2614 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2623 case '\\': /* regexp quoting */
2626 if (p
[2] == '=') /* 'operator\*=' */
2628 else /* 'operator\*' */
2632 else if (p
[1] == '[')
2635 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2636 else if (p
[2] == '\\' && p
[3] == ']')
2638 *end
= p
+ 4; /* 'operator\[\]' */
2642 error (_("nothing is allowed between '[' and ']'"));
2646 /* Gratuitous qoute: skip it and move on. */
2668 if (p
[0] == '-' && p
[1] == '>')
2670 /* Struct pointer member operator 'operator->'. */
2673 *end
= p
+ 3; /* 'operator->*' */
2676 else if (p
[2] == '\\')
2678 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2683 *end
= p
+ 2; /* 'operator->' */
2687 if (p
[1] == '=' || p
[1] == p
[0])
2698 error (_("`operator ()' must be specified without whitespace in `()'"));
2703 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2708 error (_("`operator []' must be specified without whitespace in `[]'"));
2712 error (_("`operator %s' not supported"), p
);
2721 /* If FILE is not already in the table of files, return zero;
2722 otherwise return non-zero. Optionally add FILE to the table if ADD
2723 is non-zero. If *FIRST is non-zero, forget the old table
2726 filename_seen (const char *file
, int add
, int *first
)
2728 /* Table of files seen so far. */
2729 static const char **tab
= NULL
;
2730 /* Allocated size of tab in elements.
2731 Start with one 256-byte block (when using GNU malloc.c).
2732 24 is the malloc overhead when range checking is in effect. */
2733 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2734 /* Current size of tab in elements. */
2735 static int tab_cur_size
;
2741 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2745 /* Is FILE in tab? */
2746 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2747 if (strcmp (*p
, file
) == 0)
2750 /* No; maybe add it to tab. */
2753 if (tab_cur_size
== tab_alloc_size
)
2755 tab_alloc_size
*= 2;
2756 tab
= (const char **) xrealloc ((char *) tab
,
2757 tab_alloc_size
* sizeof (*tab
));
2759 tab
[tab_cur_size
++] = file
;
2765 /* Slave routine for sources_info. Force line breaks at ,'s.
2766 NAME is the name to print and *FIRST is nonzero if this is the first
2767 name printed. Set *FIRST to zero. */
2769 output_source_filename (const char *name
, int *first
)
2771 /* Since a single source file can result in several partial symbol
2772 tables, we need to avoid printing it more than once. Note: if
2773 some of the psymtabs are read in and some are not, it gets
2774 printed both under "Source files for which symbols have been
2775 read" and "Source files for which symbols will be read in on
2776 demand". I consider this a reasonable way to deal with the
2777 situation. I'm not sure whether this can also happen for
2778 symtabs; it doesn't hurt to check. */
2780 /* Was NAME already seen? */
2781 if (filename_seen (name
, 1, first
))
2783 /* Yes; don't print it again. */
2786 /* No; print it and reset *FIRST. */
2793 printf_filtered (", ");
2797 fputs_filtered (name
, gdb_stdout
);
2800 /* A callback for map_partial_symbol_filenames. */
2802 output_partial_symbol_filename (const char *fullname
, const char *filename
,
2805 output_source_filename (fullname
? fullname
: filename
, data
);
2809 sources_info (char *ignore
, int from_tty
)
2812 struct objfile
*objfile
;
2815 if (!have_full_symbols () && !have_partial_symbols ())
2817 error (_("No symbol table is loaded. Use the \"file\" command."));
2820 printf_filtered ("Source files for which symbols have been read in:\n\n");
2823 ALL_SYMTABS (objfile
, s
)
2825 const char *fullname
= symtab_to_fullname (s
);
2827 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2829 printf_filtered ("\n\n");
2831 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2834 map_partial_symbol_filenames (output_partial_symbol_filename
, &first
);
2835 printf_filtered ("\n");
2839 file_matches (const char *file
, char *files
[], int nfiles
)
2843 if (file
!= NULL
&& nfiles
!= 0)
2845 for (i
= 0; i
< nfiles
; i
++)
2847 if (strcmp (files
[i
], lbasename (file
)) == 0)
2851 else if (nfiles
== 0)
2856 /* Free any memory associated with a search. */
2858 free_search_symbols (struct symbol_search
*symbols
)
2860 struct symbol_search
*p
;
2861 struct symbol_search
*next
;
2863 for (p
= symbols
; p
!= NULL
; p
= next
)
2871 do_free_search_symbols_cleanup (void *symbols
)
2873 free_search_symbols (symbols
);
2877 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2879 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2882 /* Helper function for sort_search_symbols and qsort. Can only
2883 sort symbols, not minimal symbols. */
2885 compare_search_syms (const void *sa
, const void *sb
)
2887 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2888 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2890 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2891 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2894 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2895 prevtail where it is, but update its next pointer to point to
2896 the first of the sorted symbols. */
2897 static struct symbol_search
*
2898 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2900 struct symbol_search
**symbols
, *symp
, *old_next
;
2903 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2905 symp
= prevtail
->next
;
2906 for (i
= 0; i
< nfound
; i
++)
2911 /* Generally NULL. */
2914 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2915 compare_search_syms
);
2918 for (i
= 0; i
< nfound
; i
++)
2920 symp
->next
= symbols
[i
];
2923 symp
->next
= old_next
;
2929 /* An object of this type is passed as the user_data to the
2930 expand_symtabs_matching method. */
2931 struct search_symbols_data
2938 /* A callback for expand_symtabs_matching. */
2940 search_symbols_file_matches (const char *filename
, void *user_data
)
2942 struct search_symbols_data
*data
= user_data
;
2944 return file_matches (filename
, data
->files
, data
->nfiles
);
2947 /* A callback for expand_symtabs_matching. */
2949 search_symbols_name_matches (const char *symname
, void *user_data
)
2951 struct search_symbols_data
*data
= user_data
;
2953 return data
->regexp
== NULL
|| re_exec (symname
);
2956 /* Search the symbol table for matches to the regular expression REGEXP,
2957 returning the results in *MATCHES.
2959 Only symbols of KIND are searched:
2960 FUNCTIONS_DOMAIN - search all functions
2961 TYPES_DOMAIN - search all type names
2962 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2963 and constants (enums)
2965 free_search_symbols should be called when *MATCHES is no longer needed.
2967 The results are sorted locally; each symtab's global and static blocks are
2968 separately alphabetized.
2971 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
2972 struct symbol_search
**matches
)
2975 struct blockvector
*bv
;
2978 struct dict_iterator iter
;
2980 struct objfile
*objfile
;
2981 struct minimal_symbol
*msymbol
;
2984 static enum minimal_symbol_type types
[]
2985 = {mst_data
, mst_text
, mst_abs
, mst_unknown
};
2986 static enum minimal_symbol_type types2
[]
2987 = {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
2988 static enum minimal_symbol_type types3
[]
2989 = {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
2990 static enum minimal_symbol_type types4
[]
2991 = {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
2992 enum minimal_symbol_type ourtype
;
2993 enum minimal_symbol_type ourtype2
;
2994 enum minimal_symbol_type ourtype3
;
2995 enum minimal_symbol_type ourtype4
;
2996 struct symbol_search
*sr
;
2997 struct symbol_search
*psr
;
2998 struct symbol_search
*tail
;
2999 struct cleanup
*old_chain
= NULL
;
3000 struct search_symbols_data datum
;
3002 if (kind
< VARIABLES_DOMAIN
)
3003 error (_("must search on specific domain"));
3005 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3006 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3007 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3008 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3010 sr
= *matches
= NULL
;
3015 /* Make sure spacing is right for C++ operators.
3016 This is just a courtesy to make the matching less sensitive
3017 to how many spaces the user leaves between 'operator'
3018 and <TYPENAME> or <OPERATOR>. */
3020 char *opname
= operator_chars (regexp
, &opend
);
3024 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
3026 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3028 /* There should 1 space between 'operator' and 'TYPENAME'. */
3029 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3034 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3035 if (opname
[-1] == ' ')
3038 /* If wrong number of spaces, fix it. */
3041 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3043 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3048 if (0 != (val
= re_comp (regexp
)))
3049 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3052 /* Search through the partial symtabs *first* for all symbols
3053 matching the regexp. That way we don't have to reproduce all of
3054 the machinery below. */
3056 datum
.nfiles
= nfiles
;
3057 datum
.files
= files
;
3058 datum
.regexp
= regexp
;
3059 ALL_OBJFILES (objfile
)
3062 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3063 search_symbols_file_matches
,
3064 search_symbols_name_matches
,
3069 /* Here, we search through the minimal symbol tables for functions
3070 and variables that match, and force their symbols to be read.
3071 This is in particular necessary for demangled variable names,
3072 which are no longer put into the partial symbol tables.
3073 The symbol will then be found during the scan of symtabs below.
3075 For functions, find_pc_symtab should succeed if we have debug info
3076 for the function, for variables we have to call lookup_symbol
3077 to determine if the variable has debug info.
3078 If the lookup fails, set found_misc so that we will rescan to print
3079 any matching symbols without debug info.
3082 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3084 ALL_MSYMBOLS (objfile
, msymbol
)
3088 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3089 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3090 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3091 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3094 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3096 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3098 /* FIXME: carlton/2003-02-04: Given that the
3099 semantics of lookup_symbol keeps on changing
3100 slightly, it would be a nice idea if we had a
3101 function lookup_symbol_minsym that found the
3102 symbol associated to a given minimal symbol (if
3104 if (kind
== FUNCTIONS_DOMAIN
3105 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3106 (struct block
*) NULL
,
3116 ALL_PRIMARY_SYMTABS (objfile
, s
)
3118 bv
= BLOCKVECTOR (s
);
3119 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3121 struct symbol_search
*prevtail
= tail
;
3124 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3125 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3127 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3131 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3133 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3134 && ((kind
== VARIABLES_DOMAIN
3135 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3136 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3137 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3138 /* LOC_CONST can be used for more than just enums,
3139 e.g., c++ static const members.
3140 We only want to skip enums here. */
3141 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3142 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_ENUM
))
3143 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3144 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3147 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3149 psr
->symtab
= real_symtab
;
3151 psr
->msymbol
= NULL
;
3163 if (prevtail
== NULL
)
3165 struct symbol_search dummy
;
3168 tail
= sort_search_symbols (&dummy
, nfound
);
3171 old_chain
= make_cleanup_free_search_symbols (sr
);
3174 tail
= sort_search_symbols (prevtail
, nfound
);
3179 /* If there are no eyes, avoid all contact. I mean, if there are
3180 no debug symbols, then print directly from the msymbol_vector. */
3182 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3184 ALL_MSYMBOLS (objfile
, msymbol
)
3188 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3189 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3190 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3191 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3194 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3196 /* Functions: Look up by address. */
3197 if (kind
!= FUNCTIONS_DOMAIN
||
3198 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3200 /* Variables/Absolutes: Look up by name */
3201 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3202 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3206 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3208 psr
->msymbol
= msymbol
;
3215 old_chain
= make_cleanup_free_search_symbols (sr
);
3229 discard_cleanups (old_chain
);
3232 /* Helper function for symtab_symbol_info, this function uses
3233 the data returned from search_symbols() to print information
3234 regarding the match to gdb_stdout.
3237 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3238 int block
, char *last
)
3240 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3242 fputs_filtered ("\nFile ", gdb_stdout
);
3243 fputs_filtered (s
->filename
, gdb_stdout
);
3244 fputs_filtered (":\n", gdb_stdout
);
3247 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3248 printf_filtered ("static ");
3250 /* Typedef that is not a C++ class */
3251 if (kind
== TYPES_DOMAIN
3252 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3253 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3254 /* variable, func, or typedef-that-is-c++-class */
3255 else if (kind
< TYPES_DOMAIN
||
3256 (kind
== TYPES_DOMAIN
&&
3257 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3259 type_print (SYMBOL_TYPE (sym
),
3260 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3261 ? "" : SYMBOL_PRINT_NAME (sym
)),
3264 printf_filtered (";\n");
3268 /* This help function for symtab_symbol_info() prints information
3269 for non-debugging symbols to gdb_stdout.
3272 print_msymbol_info (struct minimal_symbol
*msymbol
)
3274 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3277 if (gdbarch_addr_bit (gdbarch
) <= 32)
3278 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3279 & (CORE_ADDR
) 0xffffffff,
3282 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3284 printf_filtered ("%s %s\n",
3285 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3288 /* This is the guts of the commands "info functions", "info types", and
3289 "info variables". It calls search_symbols to find all matches and then
3290 print_[m]symbol_info to print out some useful information about the
3294 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3296 static char *classnames
[] = {"variable", "function", "type", "method"};
3297 struct symbol_search
*symbols
;
3298 struct symbol_search
*p
;
3299 struct cleanup
*old_chain
;
3300 char *last_filename
= NULL
;
3303 /* must make sure that if we're interrupted, symbols gets freed */
3304 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3305 old_chain
= make_cleanup_free_search_symbols (symbols
);
3307 printf_filtered (regexp
3308 ? "All %ss matching regular expression \"%s\":\n"
3309 : "All defined %ss:\n",
3310 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3312 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3316 if (p
->msymbol
!= NULL
)
3320 printf_filtered ("\nNon-debugging symbols:\n");
3323 print_msymbol_info (p
->msymbol
);
3327 print_symbol_info (kind
,
3332 last_filename
= p
->symtab
->filename
;
3336 do_cleanups (old_chain
);
3340 variables_info (char *regexp
, int from_tty
)
3342 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3346 functions_info (char *regexp
, int from_tty
)
3348 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3353 types_info (char *regexp
, int from_tty
)
3355 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3358 /* Breakpoint all functions matching regular expression. */
3361 rbreak_command_wrapper (char *regexp
, int from_tty
)
3363 rbreak_command (regexp
, from_tty
);
3366 /* A cleanup function that calls end_rbreak_breakpoints. */
3369 do_end_rbreak_breakpoints (void *ignore
)
3371 end_rbreak_breakpoints ();
3375 rbreak_command (char *regexp
, int from_tty
)
3377 struct symbol_search
*ss
;
3378 struct symbol_search
*p
;
3379 struct cleanup
*old_chain
;
3380 char *string
= NULL
;
3382 char **files
= NULL
;
3387 char *colon
= strchr (regexp
, ':');
3389 if (colon
&& *(colon
+ 1) != ':')
3394 colon_index
= colon
- regexp
;
3395 file_name
= alloca (colon_index
+ 1);
3396 memcpy (file_name
, regexp
, colon_index
);
3397 file_name
[colon_index
--] = 0;
3398 while (isspace (file_name
[colon_index
]))
3399 file_name
[colon_index
--] = 0;
3403 while (isspace (*regexp
)) regexp
++;
3407 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3408 old_chain
= make_cleanup_free_search_symbols (ss
);
3409 make_cleanup (free_current_contents
, &string
);
3411 start_rbreak_breakpoints ();
3412 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3413 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3415 if (p
->msymbol
== NULL
)
3417 int newlen
= (strlen (p
->symtab
->filename
)
3418 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3423 string
= xrealloc (string
, newlen
);
3426 strcpy (string
, p
->symtab
->filename
);
3427 strcat (string
, ":'");
3428 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3429 strcat (string
, "'");
3430 break_command (string
, from_tty
);
3431 print_symbol_info (FUNCTIONS_DOMAIN
,
3435 p
->symtab
->filename
);
3439 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3443 string
= xrealloc (string
, newlen
);
3446 strcpy (string
, "'");
3447 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3448 strcat (string
, "'");
3450 break_command (string
, from_tty
);
3451 printf_filtered ("<function, no debug info> %s;\n",
3452 SYMBOL_PRINT_NAME (p
->msymbol
));
3456 do_cleanups (old_chain
);
3460 /* Helper routine for make_symbol_completion_list. */
3462 static int return_val_size
;
3463 static int return_val_index
;
3464 static char **return_val
;
3466 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3467 completion_list_add_name \
3468 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3470 /* Test to see if the symbol specified by SYMNAME (which is already
3471 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3472 characters. If so, add it to the current completion list. */
3475 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3476 char *text
, char *word
)
3480 /* clip symbols that cannot match */
3482 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3487 /* We have a match for a completion, so add SYMNAME to the current list
3488 of matches. Note that the name is moved to freshly malloc'd space. */
3493 if (word
== sym_text
)
3495 new = xmalloc (strlen (symname
) + 5);
3496 strcpy (new, symname
);
3498 else if (word
> sym_text
)
3500 /* Return some portion of symname. */
3501 new = xmalloc (strlen (symname
) + 5);
3502 strcpy (new, symname
+ (word
- sym_text
));
3506 /* Return some of SYM_TEXT plus symname. */
3507 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3508 strncpy (new, word
, sym_text
- word
);
3509 new[sym_text
- word
] = '\0';
3510 strcat (new, symname
);
3513 if (return_val_index
+ 3 > return_val_size
)
3515 newsize
= (return_val_size
*= 2) * sizeof (char *);
3516 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3518 return_val
[return_val_index
++] = new;
3519 return_val
[return_val_index
] = NULL
;
3523 /* ObjC: In case we are completing on a selector, look as the msymbol
3524 again and feed all the selectors into the mill. */
3527 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3528 int sym_text_len
, char *text
, char *word
)
3530 static char *tmp
= NULL
;
3531 static unsigned int tmplen
= 0;
3533 char *method
, *category
, *selector
;
3536 method
= SYMBOL_NATURAL_NAME (msymbol
);
3538 /* Is it a method? */
3539 if ((method
[0] != '-') && (method
[0] != '+'))
3542 if (sym_text
[0] == '[')
3543 /* Complete on shortened method method. */
3544 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3546 while ((strlen (method
) + 1) >= tmplen
)
3552 tmp
= xrealloc (tmp
, tmplen
);
3554 selector
= strchr (method
, ' ');
3555 if (selector
!= NULL
)
3558 category
= strchr (method
, '(');
3560 if ((category
!= NULL
) && (selector
!= NULL
))
3562 memcpy (tmp
, method
, (category
- method
));
3563 tmp
[category
- method
] = ' ';
3564 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3565 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3566 if (sym_text
[0] == '[')
3567 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3570 if (selector
!= NULL
)
3572 /* Complete on selector only. */
3573 strcpy (tmp
, selector
);
3574 tmp2
= strchr (tmp
, ']');
3578 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3582 /* Break the non-quoted text based on the characters which are in
3583 symbols. FIXME: This should probably be language-specific. */
3586 language_search_unquoted_string (char *text
, char *p
)
3588 for (; p
> text
; --p
)
3590 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3594 if ((current_language
->la_language
== language_objc
))
3596 if (p
[-1] == ':') /* might be part of a method name */
3598 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3599 p
-= 2; /* beginning of a method name */
3600 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3601 { /* might be part of a method name */
3604 /* Seeing a ' ' or a '(' is not conclusive evidence
3605 that we are in the middle of a method name. However,
3606 finding "-[" or "+[" should be pretty un-ambiguous.
3607 Unfortunately we have to find it now to decide. */
3610 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3611 t
[-1] == ' ' || t
[-1] == ':' ||
3612 t
[-1] == '(' || t
[-1] == ')')
3617 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3618 p
= t
- 2; /* method name detected */
3619 /* else we leave with p unchanged */
3629 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
3630 int sym_text_len
, char *text
, char *word
)
3632 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3634 struct type
*t
= SYMBOL_TYPE (sym
);
3635 enum type_code c
= TYPE_CODE (t
);
3638 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3639 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3640 if (TYPE_FIELD_NAME (t
, j
))
3641 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3642 sym_text
, sym_text_len
, text
, word
);
3646 /* Type of the user_data argument passed to add_macro_name or
3647 add_partial_symbol_name. The contents are simply whatever is
3648 needed by completion_list_add_name. */
3649 struct add_name_data
3657 /* A callback used with macro_for_each and macro_for_each_in_scope.
3658 This adds a macro's name to the current completion list. */
3660 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
3663 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3665 completion_list_add_name ((char *) name
,
3666 datum
->sym_text
, datum
->sym_text_len
,
3667 datum
->text
, datum
->word
);
3670 /* A callback for map_partial_symbol_names. */
3672 add_partial_symbol_name (const char *name
, void *user_data
)
3674 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3676 completion_list_add_name ((char *) name
,
3677 datum
->sym_text
, datum
->sym_text_len
,
3678 datum
->text
, datum
->word
);
3682 default_make_symbol_completion_list_break_on (char *text
, char *word
,
3683 const char *break_on
)
3685 /* Problem: All of the symbols have to be copied because readline
3686 frees them. I'm not going to worry about this; hopefully there
3687 won't be that many. */
3691 struct minimal_symbol
*msymbol
;
3692 struct objfile
*objfile
;
3694 const struct block
*surrounding_static_block
, *surrounding_global_block
;
3695 struct dict_iterator iter
;
3696 /* The symbol we are completing on. Points in same buffer as text. */
3698 /* Length of sym_text. */
3700 struct add_name_data datum
;
3702 /* Now look for the symbol we are supposed to complete on. */
3706 char *quote_pos
= NULL
;
3708 /* First see if this is a quoted string. */
3710 for (p
= text
; *p
!= '\0'; ++p
)
3712 if (quote_found
!= '\0')
3714 if (*p
== quote_found
)
3715 /* Found close quote. */
3717 else if (*p
== '\\' && p
[1] == quote_found
)
3718 /* A backslash followed by the quote character
3719 doesn't end the string. */
3722 else if (*p
== '\'' || *p
== '"')
3728 if (quote_found
== '\'')
3729 /* A string within single quotes can be a symbol, so complete on it. */
3730 sym_text
= quote_pos
+ 1;
3731 else if (quote_found
== '"')
3732 /* A double-quoted string is never a symbol, nor does it make sense
3733 to complete it any other way. */
3735 return_val
= (char **) xmalloc (sizeof (char *));
3736 return_val
[0] = NULL
;
3741 /* It is not a quoted string. Break it based on the characters
3742 which are in symbols. */
3745 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
3746 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
3755 sym_text_len
= strlen (sym_text
);
3757 return_val_size
= 100;
3758 return_val_index
= 0;
3759 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3760 return_val
[0] = NULL
;
3762 datum
.sym_text
= sym_text
;
3763 datum
.sym_text_len
= sym_text_len
;
3767 /* Look through the partial symtabs for all symbols which begin
3768 by matching SYM_TEXT. Add each one that you find to the list. */
3769 map_partial_symbol_names (add_partial_symbol_name
, &datum
);
3771 /* At this point scan through the misc symbol vectors and add each
3772 symbol you find to the list. Eventually we want to ignore
3773 anything that isn't a text symbol (everything else will be
3774 handled by the psymtab code above). */
3776 ALL_MSYMBOLS (objfile
, msymbol
)
3779 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3781 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3784 /* Search upwards from currently selected frame (so that we can
3785 complete on local vars). Also catch fields of types defined in
3786 this places which match our text string. Only complete on types
3787 visible from current context. */
3789 b
= get_selected_block (0);
3790 surrounding_static_block
= block_static_block (b
);
3791 surrounding_global_block
= block_global_block (b
);
3792 if (surrounding_static_block
!= NULL
)
3793 while (b
!= surrounding_static_block
)
3797 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3799 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
3801 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
3805 /* Stop when we encounter an enclosing function. Do not stop for
3806 non-inlined functions - the locals of the enclosing function
3807 are in scope for a nested function. */
3808 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3810 b
= BLOCK_SUPERBLOCK (b
);
3813 /* Add fields from the file's types; symbols will be added below. */
3815 if (surrounding_static_block
!= NULL
)
3816 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
3817 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3819 if (surrounding_global_block
!= NULL
)
3820 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
3821 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3823 /* Go through the symtabs and check the externs and statics for
3824 symbols which match. */
3826 ALL_PRIMARY_SYMTABS (objfile
, s
)
3829 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3830 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3832 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3836 ALL_PRIMARY_SYMTABS (objfile
, s
)
3839 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3840 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3842 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3846 if (current_language
->la_macro_expansion
== macro_expansion_c
)
3848 struct macro_scope
*scope
;
3850 /* Add any macros visible in the default scope. Note that this
3851 may yield the occasional wrong result, because an expression
3852 might be evaluated in a scope other than the default. For
3853 example, if the user types "break file:line if <TAB>", the
3854 resulting expression will be evaluated at "file:line" -- but
3855 at there does not seem to be a way to detect this at
3857 scope
= default_macro_scope ();
3860 macro_for_each_in_scope (scope
->file
, scope
->line
,
3861 add_macro_name
, &datum
);
3865 /* User-defined macros are always visible. */
3866 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
3869 return (return_val
);
3873 default_make_symbol_completion_list (char *text
, char *word
)
3875 return default_make_symbol_completion_list_break_on (text
, word
, "");
3878 /* Return a NULL terminated array of all symbols (regardless of class)
3879 which begin by matching TEXT. If the answer is no symbols, then
3880 the return value is an array which contains only a NULL pointer. */
3883 make_symbol_completion_list (char *text
, char *word
)
3885 return current_language
->la_make_symbol_completion_list (text
, word
);
3888 /* Like make_symbol_completion_list, but suitable for use as a
3889 completion function. */
3892 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
3893 char *text
, char *word
)
3895 return make_symbol_completion_list (text
, word
);
3898 /* Like make_symbol_completion_list, but returns a list of symbols
3899 defined in a source file FILE. */
3902 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3907 struct dict_iterator iter
;
3908 /* The symbol we are completing on. Points in same buffer as text. */
3910 /* Length of sym_text. */
3913 /* Now look for the symbol we are supposed to complete on.
3914 FIXME: This should be language-specific. */
3918 char *quote_pos
= NULL
;
3920 /* First see if this is a quoted string. */
3922 for (p
= text
; *p
!= '\0'; ++p
)
3924 if (quote_found
!= '\0')
3926 if (*p
== quote_found
)
3927 /* Found close quote. */
3929 else if (*p
== '\\' && p
[1] == quote_found
)
3930 /* A backslash followed by the quote character
3931 doesn't end the string. */
3934 else if (*p
== '\'' || *p
== '"')
3940 if (quote_found
== '\'')
3941 /* A string within single quotes can be a symbol, so complete on it. */
3942 sym_text
= quote_pos
+ 1;
3943 else if (quote_found
== '"')
3944 /* A double-quoted string is never a symbol, nor does it make sense
3945 to complete it any other way. */
3947 return_val
= (char **) xmalloc (sizeof (char *));
3948 return_val
[0] = NULL
;
3953 /* Not a quoted string. */
3954 sym_text
= language_search_unquoted_string (text
, p
);
3958 sym_text_len
= strlen (sym_text
);
3960 return_val_size
= 10;
3961 return_val_index
= 0;
3962 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3963 return_val
[0] = NULL
;
3965 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3967 s
= lookup_symtab (srcfile
);
3970 /* Maybe they typed the file with leading directories, while the
3971 symbol tables record only its basename. */
3972 const char *tail
= lbasename (srcfile
);
3975 s
= lookup_symtab (tail
);
3978 /* If we have no symtab for that file, return an empty list. */
3980 return (return_val
);
3982 /* Go through this symtab and check the externs and statics for
3983 symbols which match. */
3985 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3986 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3988 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3991 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3992 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3994 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3997 return (return_val
);
4000 /* A helper function for make_source_files_completion_list. It adds
4001 another file name to a list of possible completions, growing the
4002 list as necessary. */
4005 add_filename_to_list (const char *fname
, char *text
, char *word
,
4006 char ***list
, int *list_used
, int *list_alloced
)
4009 size_t fnlen
= strlen (fname
);
4011 if (*list_used
+ 1 >= *list_alloced
)
4014 *list
= (char **) xrealloc ((char *) *list
,
4015 *list_alloced
* sizeof (char *));
4020 /* Return exactly fname. */
4021 new = xmalloc (fnlen
+ 5);
4022 strcpy (new, fname
);
4024 else if (word
> text
)
4026 /* Return some portion of fname. */
4027 new = xmalloc (fnlen
+ 5);
4028 strcpy (new, fname
+ (word
- text
));
4032 /* Return some of TEXT plus fname. */
4033 new = xmalloc (fnlen
+ (text
- word
) + 5);
4034 strncpy (new, word
, text
- word
);
4035 new[text
- word
] = '\0';
4036 strcat (new, fname
);
4038 (*list
)[*list_used
] = new;
4039 (*list
)[++*list_used
] = NULL
;
4043 not_interesting_fname (const char *fname
)
4045 static const char *illegal_aliens
[] = {
4046 "_globals_", /* inserted by coff_symtab_read */
4051 for (i
= 0; illegal_aliens
[i
]; i
++)
4053 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
4059 /* An object of this type is passed as the user_data argument to
4060 map_partial_symbol_filenames. */
4061 struct add_partial_filename_data
4072 /* A callback for map_partial_symbol_filenames. */
4074 maybe_add_partial_symtab_filename (const char *fullname
, const char *filename
,
4077 struct add_partial_filename_data
*data
= user_data
;
4079 if (not_interesting_fname (filename
))
4081 if (!filename_seen (filename
, 1, data
->first
)
4082 #if HAVE_DOS_BASED_FILE_SYSTEM
4083 && strncasecmp (filename
, data
->text
, data
->text_len
) == 0
4085 && strncmp (filename
, data
->text
, data
->text_len
) == 0
4089 /* This file matches for a completion; add it to the
4090 current list of matches. */
4091 add_filename_to_list (filename
, data
->text
, data
->word
,
4092 data
->list
, data
->list_used
, data
->list_alloced
);
4096 const char *base_name
= lbasename (filename
);
4098 if (base_name
!= filename
4099 && !filename_seen (base_name
, 1, data
->first
)
4100 #if HAVE_DOS_BASED_FILE_SYSTEM
4101 && strncasecmp (base_name
, data
->text
, data
->text_len
) == 0
4103 && strncmp (base_name
, data
->text
, data
->text_len
) == 0
4106 add_filename_to_list (base_name
, data
->text
, data
->word
,
4107 data
->list
, data
->list_used
, data
->list_alloced
);
4111 /* Return a NULL terminated array of all source files whose names
4112 begin with matching TEXT. The file names are looked up in the
4113 symbol tables of this program. If the answer is no matchess, then
4114 the return value is an array which contains only a NULL pointer. */
4117 make_source_files_completion_list (char *text
, char *word
)
4120 struct objfile
*objfile
;
4122 int list_alloced
= 1;
4124 size_t text_len
= strlen (text
);
4125 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4126 const char *base_name
;
4127 struct add_partial_filename_data datum
;
4131 if (!have_full_symbols () && !have_partial_symbols ())
4134 ALL_SYMTABS (objfile
, s
)
4136 if (not_interesting_fname (s
->filename
))
4138 if (!filename_seen (s
->filename
, 1, &first
)
4139 #if HAVE_DOS_BASED_FILE_SYSTEM
4140 && strncasecmp (s
->filename
, text
, text_len
) == 0
4142 && strncmp (s
->filename
, text
, text_len
) == 0
4146 /* This file matches for a completion; add it to the current
4148 add_filename_to_list (s
->filename
, text
, word
,
4149 &list
, &list_used
, &list_alloced
);
4153 /* NOTE: We allow the user to type a base name when the
4154 debug info records leading directories, but not the other
4155 way around. This is what subroutines of breakpoint
4156 command do when they parse file names. */
4157 base_name
= lbasename (s
->filename
);
4158 if (base_name
!= s
->filename
4159 && !filename_seen (base_name
, 1, &first
)
4160 #if HAVE_DOS_BASED_FILE_SYSTEM
4161 && strncasecmp (base_name
, text
, text_len
) == 0
4163 && strncmp (base_name
, text
, text_len
) == 0
4166 add_filename_to_list (base_name
, text
, word
,
4167 &list
, &list_used
, &list_alloced
);
4171 datum
.first
= &first
;
4174 datum
.text_len
= text_len
;
4176 datum
.list_used
= &list_used
;
4177 datum
.list_alloced
= &list_alloced
;
4178 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
);
4183 /* Determine if PC is in the prologue of a function. The prologue is the area
4184 between the first instruction of a function, and the first executable line.
4185 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4187 If non-zero, func_start is where we think the prologue starts, possibly
4188 by previous examination of symbol table information.
4192 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4194 struct symtab_and_line sal
;
4195 CORE_ADDR func_addr
, func_end
;
4197 /* We have several sources of information we can consult to figure
4199 - Compilers usually emit line number info that marks the prologue
4200 as its own "source line". So the ending address of that "line"
4201 is the end of the prologue. If available, this is the most
4203 - The minimal symbols and partial symbols, which can usually tell
4204 us the starting and ending addresses of a function.
4205 - If we know the function's start address, we can call the
4206 architecture-defined gdbarch_skip_prologue function to analyze the
4207 instruction stream and guess where the prologue ends.
4208 - Our `func_start' argument; if non-zero, this is the caller's
4209 best guess as to the function's entry point. At the time of
4210 this writing, handle_inferior_event doesn't get this right, so
4211 it should be our last resort. */
4213 /* Consult the partial symbol table, to find which function
4215 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4217 CORE_ADDR prologue_end
;
4219 /* We don't even have minsym information, so fall back to using
4220 func_start, if given. */
4222 return 1; /* We *might* be in a prologue. */
4224 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4226 return func_start
<= pc
&& pc
< prologue_end
;
4229 /* If we have line number information for the function, that's
4230 usually pretty reliable. */
4231 sal
= find_pc_line (func_addr
, 0);
4233 /* Now sal describes the source line at the function's entry point,
4234 which (by convention) is the prologue. The end of that "line",
4235 sal.end, is the end of the prologue.
4237 Note that, for functions whose source code is all on a single
4238 line, the line number information doesn't always end up this way.
4239 So we must verify that our purported end-of-prologue address is
4240 *within* the function, not at its start or end. */
4242 || sal
.end
<= func_addr
4243 || func_end
<= sal
.end
)
4245 /* We don't have any good line number info, so use the minsym
4246 information, together with the architecture-specific prologue
4248 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4250 return func_addr
<= pc
&& pc
< prologue_end
;
4253 /* We have line number info, and it looks good. */
4254 return func_addr
<= pc
&& pc
< sal
.end
;
4257 /* Given PC at the function's start address, attempt to find the
4258 prologue end using SAL information. Return zero if the skip fails.
4260 A non-optimized prologue traditionally has one SAL for the function
4261 and a second for the function body. A single line function has
4262 them both pointing at the same line.
4264 An optimized prologue is similar but the prologue may contain
4265 instructions (SALs) from the instruction body. Need to skip those
4266 while not getting into the function body.
4268 The functions end point and an increasing SAL line are used as
4269 indicators of the prologue's endpoint.
4271 This code is based on the function refine_prologue_limit (versions
4272 found in both ia64 and ppc). */
4275 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4277 struct symtab_and_line prologue_sal
;
4282 /* Get an initial range for the function. */
4283 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4284 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4286 prologue_sal
= find_pc_line (start_pc
, 0);
4287 if (prologue_sal
.line
!= 0)
4289 /* For langauges other than assembly, treat two consecutive line
4290 entries at the same address as a zero-instruction prologue.
4291 The GNU assembler emits separate line notes for each instruction
4292 in a multi-instruction macro, but compilers generally will not
4294 if (prologue_sal
.symtab
->language
!= language_asm
)
4296 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4299 /* Skip any earlier lines, and any end-of-sequence marker
4300 from a previous function. */
4301 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4302 || linetable
->item
[idx
].line
== 0)
4305 if (idx
+1 < linetable
->nitems
4306 && linetable
->item
[idx
+1].line
!= 0
4307 && linetable
->item
[idx
+1].pc
== start_pc
)
4311 /* If there is only one sal that covers the entire function,
4312 then it is probably a single line function, like
4314 if (prologue_sal
.end
>= end_pc
)
4317 while (prologue_sal
.end
< end_pc
)
4319 struct symtab_and_line sal
;
4321 sal
= find_pc_line (prologue_sal
.end
, 0);
4324 /* Assume that a consecutive SAL for the same (or larger)
4325 line mark the prologue -> body transition. */
4326 if (sal
.line
>= prologue_sal
.line
)
4329 /* The line number is smaller. Check that it's from the
4330 same function, not something inlined. If it's inlined,
4331 then there is no point comparing the line numbers. */
4332 bl
= block_for_pc (prologue_sal
.end
);
4335 if (block_inlined_p (bl
))
4337 if (BLOCK_FUNCTION (bl
))
4342 bl
= BLOCK_SUPERBLOCK (bl
);
4347 /* The case in which compiler's optimizer/scheduler has
4348 moved instructions into the prologue. We look ahead in
4349 the function looking for address ranges whose
4350 corresponding line number is less the first one that we
4351 found for the function. This is more conservative then
4352 refine_prologue_limit which scans a large number of SALs
4353 looking for any in the prologue */
4358 if (prologue_sal
.end
< end_pc
)
4359 /* Return the end of this line, or zero if we could not find a
4361 return prologue_sal
.end
;
4363 /* Don't return END_PC, which is past the end of the function. */
4364 return prologue_sal
.pc
;
4367 struct symtabs_and_lines
4368 decode_line_spec (char *string
, int funfirstline
)
4370 struct symtabs_and_lines sals
;
4371 struct symtab_and_line cursal
;
4374 error (_("Empty line specification."));
4376 /* We use whatever is set as the current source line. We do not try
4377 and get a default or it will recursively call us! */
4378 cursal
= get_current_source_symtab_and_line ();
4380 sals
= decode_line_1 (&string
, funfirstline
,
4381 cursal
.symtab
, cursal
.line
,
4382 (char ***) NULL
, NULL
);
4385 error (_("Junk at end of line specification: %s"), string
);
4390 static char *name_of_main
;
4393 set_main_name (const char *name
)
4395 if (name_of_main
!= NULL
)
4397 xfree (name_of_main
);
4398 name_of_main
= NULL
;
4402 name_of_main
= xstrdup (name
);
4406 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4410 find_main_name (void)
4412 const char *new_main_name
;
4414 /* Try to see if the main procedure is in Ada. */
4415 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4416 be to add a new method in the language vector, and call this
4417 method for each language until one of them returns a non-empty
4418 name. This would allow us to remove this hard-coded call to
4419 an Ada function. It is not clear that this is a better approach
4420 at this point, because all methods need to be written in a way
4421 such that false positives never be returned. For instance, it is
4422 important that a method does not return a wrong name for the main
4423 procedure if the main procedure is actually written in a different
4424 language. It is easy to guaranty this with Ada, since we use a
4425 special symbol generated only when the main in Ada to find the name
4426 of the main procedure. It is difficult however to see how this can
4427 be guarantied for languages such as C, for instance. This suggests
4428 that order of call for these methods becomes important, which means
4429 a more complicated approach. */
4430 new_main_name
= ada_main_name ();
4431 if (new_main_name
!= NULL
)
4433 set_main_name (new_main_name
);
4437 new_main_name
= pascal_main_name ();
4438 if (new_main_name
!= NULL
)
4440 set_main_name (new_main_name
);
4444 /* The languages above didn't identify the name of the main procedure.
4445 Fallback to "main". */
4446 set_main_name ("main");
4452 if (name_of_main
== NULL
)
4455 return name_of_main
;
4458 /* Handle ``executable_changed'' events for the symtab module. */
4461 symtab_observer_executable_changed (void)
4463 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4464 set_main_name (NULL
);
4467 /* Helper to expand_line_sal below. Appends new sal to SAL,
4468 initializing it from SYMTAB, LINENO and PC. */
4470 append_expanded_sal (struct symtabs_and_lines
*sal
,
4471 struct program_space
*pspace
,
4472 struct symtab
*symtab
,
4473 int lineno
, CORE_ADDR pc
)
4475 sal
->sals
= xrealloc (sal
->sals
,
4476 sizeof (sal
->sals
[0])
4477 * (sal
->nelts
+ 1));
4478 init_sal (sal
->sals
+ sal
->nelts
);
4479 sal
->sals
[sal
->nelts
].pspace
= pspace
;
4480 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4481 sal
->sals
[sal
->nelts
].section
= NULL
;
4482 sal
->sals
[sal
->nelts
].end
= 0;
4483 sal
->sals
[sal
->nelts
].line
= lineno
;
4484 sal
->sals
[sal
->nelts
].pc
= pc
;
4488 /* Helper to expand_line_sal below. Search in the symtabs for any
4489 linetable entry that exactly matches FULLNAME and LINENO and append
4490 them to RET. If FULLNAME is NULL or if a symtab has no full name,
4491 use FILENAME and LINENO instead. If there is at least one match,
4492 return 1; otherwise, return 0, and return the best choice in BEST_ITEM
4496 append_exact_match_to_sals (char *filename
, char *fullname
, int lineno
,
4497 struct symtabs_and_lines
*ret
,
4498 struct linetable_entry
**best_item
,
4499 struct symtab
**best_symtab
)
4501 struct program_space
*pspace
;
4502 struct objfile
*objfile
;
4503 struct symtab
*symtab
;
4509 ALL_PSPACES (pspace
)
4510 ALL_PSPACE_SYMTABS (pspace
, objfile
, symtab
)
4512 if (FILENAME_CMP (filename
, symtab
->filename
) == 0)
4514 struct linetable
*l
;
4517 if (fullname
!= NULL
4518 && symtab_to_fullname (symtab
) != NULL
4519 && FILENAME_CMP (fullname
, symtab
->fullname
) != 0)
4521 l
= LINETABLE (symtab
);
4526 for (j
= 0; j
< len
; j
++)
4528 struct linetable_entry
*item
= &(l
->item
[j
]);
4530 if (item
->line
== lineno
)
4533 append_expanded_sal (ret
, objfile
->pspace
,
4534 symtab
, lineno
, item
->pc
);
4536 else if (!exact
&& item
->line
> lineno
4537 && (*best_item
== NULL
4538 || item
->line
< (*best_item
)->line
))
4541 *best_symtab
= symtab
;
4549 /* Compute a set of all sals in all program spaces that correspond to
4550 same file and line as SAL and return those. If there are several
4551 sals that belong to the same block, only one sal for the block is
4552 included in results. */
4554 struct symtabs_and_lines
4555 expand_line_sal (struct symtab_and_line sal
)
4557 struct symtabs_and_lines ret
;
4559 struct objfile
*objfile
;
4562 struct block
**blocks
= NULL
;
4564 struct cleanup
*old_chain
;
4569 /* Only expand sals that represent file.c:line. */
4570 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4572 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4579 struct program_space
*pspace
;
4580 struct linetable_entry
*best_item
= 0;
4581 struct symtab
*best_symtab
= 0;
4583 char *match_filename
;
4586 match_filename
= sal
.symtab
->filename
;
4588 /* We need to find all symtabs for a file which name
4589 is described by sal. We cannot just directly
4590 iterate over symtabs, since a symtab might not be
4591 yet created. We also cannot iterate over psymtabs,
4592 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4593 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4594 corresponding to an included file. Therefore, we do
4595 first pass over psymtabs, reading in those with
4596 the right name. Then, we iterate over symtabs, knowing
4597 that all symtabs we're interested in are loaded. */
4599 old_chain
= save_current_program_space ();
4600 ALL_PSPACES (pspace
)
4602 set_current_program_space (pspace
);
4603 ALL_PSPACE_OBJFILES (pspace
, objfile
)
4606 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
4607 sal
.symtab
->filename
);
4610 do_cleanups (old_chain
);
4612 /* Now search the symtab for exact matches and append them. If
4613 none is found, append the best_item and all its exact
4615 symtab_to_fullname (sal
.symtab
);
4616 exact
= append_exact_match_to_sals (sal
.symtab
->filename
,
4617 sal
.symtab
->fullname
, lineno
,
4618 &ret
, &best_item
, &best_symtab
);
4619 if (!exact
&& best_item
)
4620 append_exact_match_to_sals (best_symtab
->filename
,
4621 best_symtab
->fullname
, best_item
->line
,
4622 &ret
, &best_item
, &best_symtab
);
4625 /* For optimized code, compiler can scatter one source line accross
4626 disjoint ranges of PC values, even when no duplicate functions
4627 or inline functions are involved. For example, 'for (;;)' inside
4628 non-template non-inline non-ctor-or-dtor function can result
4629 in two PC ranges. In this case, we don't want to set breakpoint
4630 on first PC of each range. To filter such cases, we use containing
4631 blocks -- for each PC found above we see if there are other PCs
4632 that are in the same block. If yes, the other PCs are filtered out. */
4634 old_chain
= save_current_program_space ();
4635 filter
= alloca (ret
.nelts
* sizeof (int));
4636 blocks
= alloca (ret
.nelts
* sizeof (struct block
*));
4637 for (i
= 0; i
< ret
.nelts
; ++i
)
4639 set_current_program_space (ret
.sals
[i
].pspace
);
4642 blocks
[i
] = block_for_pc_sect (ret
.sals
[i
].pc
, ret
.sals
[i
].section
);
4645 do_cleanups (old_chain
);
4647 for (i
= 0; i
< ret
.nelts
; ++i
)
4648 if (blocks
[i
] != NULL
)
4649 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4650 if (blocks
[j
] == blocks
[i
])
4658 struct symtab_and_line
*final
=
4659 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4661 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4663 final
[j
++] = ret
.sals
[i
];
4665 ret
.nelts
-= deleted
;
4673 /* Return 1 if the supplied producer string matches the ARM RealView
4674 compiler (armcc). */
4677 producer_is_realview (const char *producer
)
4679 static const char *const arm_idents
[] = {
4680 "ARM C Compiler, ADS",
4681 "Thumb C Compiler, ADS",
4682 "ARM C++ Compiler, ADS",
4683 "Thumb C++ Compiler, ADS",
4684 "ARM/Thumb C/C++ Compiler, RVCT",
4685 "ARM C/C++ Compiler, RVCT"
4689 if (producer
== NULL
)
4692 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4693 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4700 _initialize_symtab (void)
4702 add_info ("variables", variables_info
, _("\
4703 All global and static variable names, or those matching REGEXP."));
4705 add_com ("whereis", class_info
, variables_info
, _("\
4706 All global and static variable names, or those matching REGEXP."));
4708 add_info ("functions", functions_info
,
4709 _("All function names, or those matching REGEXP."));
4711 /* FIXME: This command has at least the following problems:
4712 1. It prints builtin types (in a very strange and confusing fashion).
4713 2. It doesn't print right, e.g. with
4714 typedef struct foo *FOO
4715 type_print prints "FOO" when we want to make it (in this situation)
4716 print "struct foo *".
4717 I also think "ptype" or "whatis" is more likely to be useful (but if
4718 there is much disagreement "info types" can be fixed). */
4719 add_info ("types", types_info
,
4720 _("All type names, or those matching REGEXP."));
4722 add_info ("sources", sources_info
,
4723 _("Source files in the program."));
4725 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4726 _("Set a breakpoint for all functions matching REGEXP."));
4730 add_com ("lf", class_info
, sources_info
,
4731 _("Source files in the program"));
4732 add_com ("lg", class_info
, variables_info
, _("\
4733 All global and static variable names, or those matching REGEXP."));
4736 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4737 multiple_symbols_modes
, &multiple_symbols_mode
,
4739 Set the debugger behavior when more than one symbol are possible matches\n\
4740 in an expression."), _("\
4741 Show how the debugger handles ambiguities in expressions."), _("\
4742 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4743 NULL
, NULL
, &setlist
, &showlist
);
4745 observer_attach_executable_changed (symtab_observer_executable_changed
);