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, 2011 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
);
294 is_constructor
= is_full_physname_constructor
295 || (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 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
386 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
391 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
395 /* Initialize the language dependent portion of a symbol
396 depending upon the language for the symbol. */
398 symbol_set_language (struct general_symbol_info
*gsymbol
,
399 enum language language
)
401 gsymbol
->language
= language
;
402 if (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
);
1409 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1410 %s may be an inlined function, or may be a template function\n\
1411 (if a template, try specifying an instantiation: %s<type>)."),
1412 kind
== GLOBAL_BLOCK
? "global" : "static",
1413 name
, symtab
->filename
, name
, name
);
1415 return fixup_symbol_section (sym
, objfile
);
1418 /* A default version of lookup_symbol_nonlocal for use by languages
1419 that can't think of anything better to do. This implements the C
1423 basic_lookup_symbol_nonlocal (const char *name
,
1424 const struct block
*block
,
1425 const domain_enum domain
)
1429 /* NOTE: carlton/2003-05-19: The comments below were written when
1430 this (or what turned into this) was part of lookup_symbol_aux;
1431 I'm much less worried about these questions now, since these
1432 decisions have turned out well, but I leave these comments here
1435 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1436 not it would be appropriate to search the current global block
1437 here as well. (That's what this code used to do before the
1438 is_a_field_of_this check was moved up.) On the one hand, it's
1439 redundant with the lookup_symbol_aux_symtabs search that happens
1440 next. On the other hand, if decode_line_1 is passed an argument
1441 like filename:var, then the user presumably wants 'var' to be
1442 searched for in filename. On the third hand, there shouldn't be
1443 multiple global variables all of which are named 'var', and it's
1444 not like decode_line_1 has ever restricted its search to only
1445 global variables in a single filename. All in all, only
1446 searching the static block here seems best: it's correct and it's
1449 /* NOTE: carlton/2002-12-05: There's also a possible performance
1450 issue here: if you usually search for global symbols in the
1451 current file, then it would be slightly better to search the
1452 current global block before searching all the symtabs. But there
1453 are other factors that have a much greater effect on performance
1454 than that one, so I don't think we should worry about that for
1457 sym
= lookup_symbol_static (name
, block
, domain
);
1461 return lookup_symbol_global (name
, block
, domain
);
1464 /* Lookup a symbol in the static block associated to BLOCK, if there
1465 is one; do nothing if BLOCK is NULL or a global block. */
1468 lookup_symbol_static (const char *name
,
1469 const struct block
*block
,
1470 const domain_enum domain
)
1472 const struct block
*static_block
= block_static_block (block
);
1474 if (static_block
!= NULL
)
1475 return lookup_symbol_aux_block (name
, static_block
, domain
);
1480 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1484 lookup_symbol_global (const char *name
,
1485 const struct block
*block
,
1486 const domain_enum domain
)
1488 struct symbol
*sym
= NULL
;
1489 struct objfile
*objfile
= NULL
;
1491 /* Call library-specific lookup procedure. */
1492 objfile
= lookup_objfile_from_block (block
);
1493 if (objfile
!= NULL
)
1494 sym
= solib_global_lookup (objfile
, name
, domain
);
1498 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, domain
);
1502 ALL_OBJFILES (objfile
)
1504 sym
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
, name
, domain
);
1513 symbol_matches_domain (enum language symbol_language
,
1514 domain_enum symbol_domain
,
1517 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1518 A Java class declaration also defines a typedef for the class.
1519 Similarly, any Ada type declaration implicitly defines a typedef. */
1520 if (symbol_language
== language_cplus
1521 || symbol_language
== language_d
1522 || symbol_language
== language_java
1523 || symbol_language
== language_ada
)
1525 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1526 && symbol_domain
== STRUCT_DOMAIN
)
1529 /* For all other languages, strict match is required. */
1530 return (symbol_domain
== domain
);
1533 /* Look up a type named NAME in the struct_domain. The type returned
1534 must not be opaque -- i.e., must have at least one field
1538 lookup_transparent_type (const char *name
)
1540 return current_language
->la_lookup_transparent_type (name
);
1543 /* A helper for basic_lookup_transparent_type that interfaces with the
1544 "quick" symbol table functions. */
1546 static struct type
*
1547 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1550 struct symtab
*symtab
;
1551 struct blockvector
*bv
;
1552 struct block
*block
;
1557 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1561 bv
= BLOCKVECTOR (symtab
);
1562 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1563 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1566 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1568 /* This shouldn't be necessary, but as a last resort
1569 * try looking in the 'other kind' even though the psymtab
1570 * claimed the symbol was one thing. It's possible that
1571 * the psymtab gets it wrong in some cases.
1573 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1574 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1576 /* FIXME; error is wrong in one case. */
1578 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1579 %s may be an inlined function, or may be a template function\n\
1580 (if a template, try specifying an instantiation: %s<type>)."),
1581 name
, symtab
->filename
, name
, name
);
1583 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1584 return SYMBOL_TYPE (sym
);
1589 /* The standard implementation of lookup_transparent_type. This code
1590 was modeled on lookup_symbol -- the parts not relevant to looking
1591 up types were just left out. In particular it's assumed here that
1592 types are available in struct_domain and only at file-static or
1596 basic_lookup_transparent_type (const char *name
)
1599 struct symtab
*s
= NULL
;
1600 struct blockvector
*bv
;
1601 struct objfile
*objfile
;
1602 struct block
*block
;
1605 /* Now search all the global symbols. Do the symtab's first, then
1606 check the psymtab's. If a psymtab indicates the existence
1607 of the desired name as a global, then do psymtab-to-symtab
1608 conversion on the fly and return the found symbol. */
1610 ALL_OBJFILES (objfile
)
1613 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1615 name
, STRUCT_DOMAIN
);
1617 ALL_OBJFILE_SYMTABS (objfile
, s
)
1620 bv
= BLOCKVECTOR (s
);
1621 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1622 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1623 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1625 return SYMBOL_TYPE (sym
);
1630 ALL_OBJFILES (objfile
)
1632 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1637 /* Now search the static file-level symbols.
1638 Not strictly correct, but more useful than an error.
1639 Do the symtab's first, then
1640 check the psymtab's. If a psymtab indicates the existence
1641 of the desired name as a file-level static, then do psymtab-to-symtab
1642 conversion on the fly and return the found symbol. */
1644 ALL_OBJFILES (objfile
)
1647 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, STATIC_BLOCK
,
1648 name
, STRUCT_DOMAIN
);
1650 ALL_OBJFILE_SYMTABS (objfile
, s
)
1652 bv
= BLOCKVECTOR (s
);
1653 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1654 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1655 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1657 return SYMBOL_TYPE (sym
);
1662 ALL_OBJFILES (objfile
)
1664 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1669 return (struct type
*) 0;
1673 /* Find the name of the file containing main(). */
1674 /* FIXME: What about languages without main() or specially linked
1675 executables that have no main() ? */
1678 find_main_filename (void)
1680 struct objfile
*objfile
;
1681 char *name
= main_name ();
1683 ALL_OBJFILES (objfile
)
1689 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1696 /* Search BLOCK for symbol NAME in DOMAIN.
1698 Note that if NAME is the demangled form of a C++ symbol, we will fail
1699 to find a match during the binary search of the non-encoded names, but
1700 for now we don't worry about the slight inefficiency of looking for
1701 a match we'll never find, since it will go pretty quick. Once the
1702 binary search terminates, we drop through and do a straight linear
1703 search on the symbols. Each symbol which is marked as being a ObjC/C++
1704 symbol (language_cplus or language_objc set) has both the encoded and
1705 non-encoded names tested for a match. */
1708 lookup_block_symbol (const struct block
*block
, const char *name
,
1709 const domain_enum domain
)
1711 struct dict_iterator iter
;
1714 if (!BLOCK_FUNCTION (block
))
1716 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1718 sym
= dict_iter_name_next (name
, &iter
))
1720 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1721 SYMBOL_DOMAIN (sym
), domain
))
1728 /* Note that parameter symbols do not always show up last in the
1729 list; this loop makes sure to take anything else other than
1730 parameter symbols first; it only uses parameter symbols as a
1731 last resort. Note that this only takes up extra computation
1734 struct symbol
*sym_found
= NULL
;
1736 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1738 sym
= dict_iter_name_next (name
, &iter
))
1740 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1741 SYMBOL_DOMAIN (sym
), domain
))
1744 if (!SYMBOL_IS_ARGUMENT (sym
))
1750 return (sym_found
); /* Will be NULL if not found. */
1754 /* Find the symtab associated with PC and SECTION. Look through the
1755 psymtabs and read in another symtab if necessary. */
1758 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
1761 struct blockvector
*bv
;
1762 struct symtab
*s
= NULL
;
1763 struct symtab
*best_s
= NULL
;
1764 struct objfile
*objfile
;
1765 struct program_space
*pspace
;
1766 CORE_ADDR distance
= 0;
1767 struct minimal_symbol
*msymbol
;
1769 pspace
= current_program_space
;
1771 /* If we know that this is not a text address, return failure. This is
1772 necessary because we loop based on the block's high and low code
1773 addresses, which do not include the data ranges, and because
1774 we call find_pc_sect_psymtab which has a similar restriction based
1775 on the partial_symtab's texthigh and textlow. */
1776 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1778 && (MSYMBOL_TYPE (msymbol
) == mst_data
1779 || MSYMBOL_TYPE (msymbol
) == mst_bss
1780 || MSYMBOL_TYPE (msymbol
) == mst_abs
1781 || MSYMBOL_TYPE (msymbol
) == mst_file_data
1782 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
1785 /* Search all symtabs for the one whose file contains our address, and which
1786 is the smallest of all the ones containing the address. This is designed
1787 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1788 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1789 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1791 This happens for native ecoff format, where code from included files
1792 gets its own symtab. The symtab for the included file should have
1793 been read in already via the dependency mechanism.
1794 It might be swifter to create several symtabs with the same name
1795 like xcoff does (I'm not sure).
1797 It also happens for objfiles that have their functions reordered.
1798 For these, the symtab we are looking for is not necessarily read in. */
1800 ALL_PRIMARY_SYMTABS (objfile
, s
)
1802 bv
= BLOCKVECTOR (s
);
1803 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1805 if (BLOCK_START (b
) <= pc
1806 && BLOCK_END (b
) > pc
1808 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
1810 /* For an objfile that has its functions reordered,
1811 find_pc_psymtab will find the proper partial symbol table
1812 and we simply return its corresponding symtab. */
1813 /* In order to better support objfiles that contain both
1814 stabs and coff debugging info, we continue on if a psymtab
1816 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
1818 struct symtab
*result
;
1821 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1830 struct dict_iterator iter
;
1831 struct symbol
*sym
= NULL
;
1833 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1835 fixup_symbol_section (sym
, objfile
);
1836 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
1840 continue; /* No symbol in this symtab matches
1843 distance
= BLOCK_END (b
) - BLOCK_START (b
);
1851 ALL_OBJFILES (objfile
)
1853 struct symtab
*result
;
1857 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1868 /* Find the symtab associated with PC. Look through the psymtabs and read
1869 in another symtab if necessary. Backward compatibility, no section. */
1872 find_pc_symtab (CORE_ADDR pc
)
1874 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
1878 /* Find the source file and line number for a given PC value and SECTION.
1879 Return a structure containing a symtab pointer, a line number,
1880 and a pc range for the entire source line.
1881 The value's .pc field is NOT the specified pc.
1882 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1883 use the line that ends there. Otherwise, in that case, the line
1884 that begins there is used. */
1886 /* The big complication here is that a line may start in one file, and end just
1887 before the start of another file. This usually occurs when you #include
1888 code in the middle of a subroutine. To properly find the end of a line's PC
1889 range, we must search all symtabs associated with this compilation unit, and
1890 find the one whose first PC is closer than that of the next line in this
1893 /* If it's worth the effort, we could be using a binary search. */
1895 struct symtab_and_line
1896 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
1899 struct linetable
*l
;
1902 struct linetable_entry
*item
;
1903 struct symtab_and_line val
;
1904 struct blockvector
*bv
;
1905 struct minimal_symbol
*msymbol
;
1906 struct minimal_symbol
*mfunsym
;
1908 /* Info on best line seen so far, and where it starts, and its file. */
1910 struct linetable_entry
*best
= NULL
;
1911 CORE_ADDR best_end
= 0;
1912 struct symtab
*best_symtab
= 0;
1914 /* Store here the first line number
1915 of a file which contains the line at the smallest pc after PC.
1916 If we don't find a line whose range contains PC,
1917 we will use a line one less than this,
1918 with a range from the start of that file to the first line's pc. */
1919 struct linetable_entry
*alt
= NULL
;
1920 struct symtab
*alt_symtab
= 0;
1922 /* Info on best line seen in this file. */
1924 struct linetable_entry
*prev
;
1926 /* If this pc is not from the current frame,
1927 it is the address of the end of a call instruction.
1928 Quite likely that is the start of the following statement.
1929 But what we want is the statement containing the instruction.
1930 Fudge the pc to make sure we get that. */
1932 init_sal (&val
); /* initialize to zeroes */
1934 val
.pspace
= current_program_space
;
1936 /* It's tempting to assume that, if we can't find debugging info for
1937 any function enclosing PC, that we shouldn't search for line
1938 number info, either. However, GAS can emit line number info for
1939 assembly files --- very helpful when debugging hand-written
1940 assembly code. In such a case, we'd have no debug info for the
1941 function, but we would have line info. */
1946 /* elz: added this because this function returned the wrong
1947 information if the pc belongs to a stub (import/export)
1948 to call a shlib function. This stub would be anywhere between
1949 two functions in the target, and the line info was erroneously
1950 taken to be the one of the line before the pc. */
1952 /* RT: Further explanation:
1954 * We have stubs (trampolines) inserted between procedures.
1956 * Example: "shr1" exists in a shared library, and a "shr1" stub also
1957 * exists in the main image.
1959 * In the minimal symbol table, we have a bunch of symbols
1960 * sorted by start address. The stubs are marked as "trampoline",
1961 * the others appear as text. E.g.:
1963 * Minimal symbol table for main image
1964 * main: code for main (text symbol)
1965 * shr1: stub (trampoline symbol)
1966 * foo: code for foo (text symbol)
1968 * Minimal symbol table for "shr1" image:
1970 * shr1: code for shr1 (text symbol)
1973 * So the code below is trying to detect if we are in the stub
1974 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
1975 * and if found, do the symbolization from the real-code address
1976 * rather than the stub address.
1978 * Assumptions being made about the minimal symbol table:
1979 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
1980 * if we're really in the trampoline.s If we're beyond it (say
1981 * we're in "foo" in the above example), it'll have a closer
1982 * symbol (the "foo" text symbol for example) and will not
1983 * return the trampoline.
1984 * 2. lookup_minimal_symbol_text() will find a real text symbol
1985 * corresponding to the trampoline, and whose address will
1986 * be different than the trampoline address. I put in a sanity
1987 * check for the address being the same, to avoid an
1988 * infinite recursion.
1990 msymbol
= lookup_minimal_symbol_by_pc (pc
);
1991 if (msymbol
!= NULL
)
1992 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
1994 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
1996 if (mfunsym
== NULL
)
1997 /* I eliminated this warning since it is coming out
1998 * in the following situation:
1999 * gdb shmain // test program with shared libraries
2000 * (gdb) break shr1 // function in shared lib
2001 * Warning: In stub for ...
2002 * In the above situation, the shared lib is not loaded yet,
2003 * so of course we can't find the real func/line info,
2004 * but the "break" still works, and the warning is annoying.
2005 * So I commented out the warning. RT */
2006 /* warning ("In stub for %s; unable to find real function/line info",
2007 SYMBOL_LINKAGE_NAME (msymbol)); */
2010 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
2011 == SYMBOL_VALUE_ADDRESS (msymbol
))
2012 /* Avoid infinite recursion */
2013 /* See above comment about why warning is commented out. */
2014 /* warning ("In stub for %s; unable to find real function/line info",
2015 SYMBOL_LINKAGE_NAME (msymbol)); */
2019 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2023 s
= find_pc_sect_symtab (pc
, section
);
2026 /* If no symbol information, return previous pc. */
2033 bv
= BLOCKVECTOR (s
);
2035 /* Look at all the symtabs that share this blockvector.
2036 They all have the same apriori range, that we found was right;
2037 but they have different line tables. */
2039 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
2041 /* Find the best line in this symtab. */
2048 /* I think len can be zero if the symtab lacks line numbers
2049 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2050 I'm not sure which, and maybe it depends on the symbol
2056 item
= l
->item
; /* Get first line info. */
2058 /* Is this file's first line closer than the first lines of other files?
2059 If so, record this file, and its first line, as best alternate. */
2060 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2066 for (i
= 0; i
< len
; i
++, item
++)
2068 /* Leave prev pointing to the linetable entry for the last line
2069 that started at or before PC. */
2076 /* At this point, prev points at the line whose start addr is <= pc, and
2077 item points at the next line. If we ran off the end of the linetable
2078 (pc >= start of the last line), then prev == item. If pc < start of
2079 the first line, prev will not be set. */
2081 /* Is this file's best line closer than the best in the other files?
2082 If so, record this file, and its best line, as best so far. Don't
2083 save prev if it represents the end of a function (i.e. line number
2084 0) instead of a real line. */
2086 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2091 /* Discard BEST_END if it's before the PC of the current BEST. */
2092 if (best_end
<= best
->pc
)
2096 /* If another line (denoted by ITEM) is in the linetable and its
2097 PC is after BEST's PC, but before the current BEST_END, then
2098 use ITEM's PC as the new best_end. */
2099 if (best
&& i
< len
&& item
->pc
> best
->pc
2100 && (best_end
== 0 || best_end
> item
->pc
))
2101 best_end
= item
->pc
;
2106 /* If we didn't find any line number info, just return zeros.
2107 We used to return alt->line - 1 here, but that could be
2108 anywhere; if we don't have line number info for this PC,
2109 don't make some up. */
2112 else if (best
->line
== 0)
2114 /* If our best fit is in a range of PC's for which no line
2115 number info is available (line number is zero) then we didn't
2116 find any valid line information. */
2121 val
.symtab
= best_symtab
;
2122 val
.line
= best
->line
;
2124 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2129 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2131 val
.section
= section
;
2135 /* Backward compatibility (no section). */
2137 struct symtab_and_line
2138 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2140 struct obj_section
*section
;
2142 section
= find_pc_overlay (pc
);
2143 if (pc_in_unmapped_range (pc
, section
))
2144 pc
= overlay_mapped_address (pc
, section
);
2145 return find_pc_sect_line (pc
, section
, notcurrent
);
2148 /* Find line number LINE in any symtab whose name is the same as
2151 If found, return the symtab that contains the linetable in which it was
2152 found, set *INDEX to the index in the linetable of the best entry
2153 found, and set *EXACT_MATCH nonzero if the value returned is an
2156 If not found, return NULL. */
2159 find_line_symtab (struct symtab
*symtab
, int line
,
2160 int *index
, int *exact_match
)
2162 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2164 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2168 struct linetable
*best_linetable
;
2169 struct symtab
*best_symtab
;
2171 /* First try looking it up in the given symtab. */
2172 best_linetable
= LINETABLE (symtab
);
2173 best_symtab
= symtab
;
2174 best_index
= find_line_common (best_linetable
, line
, &exact
);
2175 if (best_index
< 0 || !exact
)
2177 /* Didn't find an exact match. So we better keep looking for
2178 another symtab with the same name. In the case of xcoff,
2179 multiple csects for one source file (produced by IBM's FORTRAN
2180 compiler) produce multiple symtabs (this is unavoidable
2181 assuming csects can be at arbitrary places in memory and that
2182 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2184 /* BEST is the smallest linenumber > LINE so far seen,
2185 or 0 if none has been seen so far.
2186 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2189 struct objfile
*objfile
;
2192 if (best_index
>= 0)
2193 best
= best_linetable
->item
[best_index
].line
;
2197 ALL_OBJFILES (objfile
)
2200 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2204 /* Get symbol full file name if possible. */
2205 symtab_to_fullname (symtab
);
2207 ALL_SYMTABS (objfile
, s
)
2209 struct linetable
*l
;
2212 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2214 if (symtab
->fullname
!= NULL
2215 && symtab_to_fullname (s
) != NULL
2216 && FILENAME_CMP (symtab
->fullname
, s
->fullname
) != 0)
2219 ind
= find_line_common (l
, line
, &exact
);
2229 if (best
== 0 || l
->item
[ind
].line
< best
)
2231 best
= l
->item
[ind
].line
;
2244 *index
= best_index
;
2246 *exact_match
= exact
;
2251 /* Set the PC value for a given source file and line number and return true.
2252 Returns zero for invalid line number (and sets the PC to 0).
2253 The source file is specified with a struct symtab. */
2256 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2258 struct linetable
*l
;
2265 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2268 l
= LINETABLE (symtab
);
2269 *pc
= l
->item
[ind
].pc
;
2276 /* Find the range of pc values in a line.
2277 Store the starting pc of the line into *STARTPTR
2278 and the ending pc (start of next line) into *ENDPTR.
2279 Returns 1 to indicate success.
2280 Returns 0 if could not find the specified line. */
2283 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2286 CORE_ADDR startaddr
;
2287 struct symtab_and_line found_sal
;
2290 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2293 /* This whole function is based on address. For example, if line 10 has
2294 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2295 "info line *0x123" should say the line goes from 0x100 to 0x200
2296 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2297 This also insures that we never give a range like "starts at 0x134
2298 and ends at 0x12c". */
2300 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2301 if (found_sal
.line
!= sal
.line
)
2303 /* The specified line (sal) has zero bytes. */
2304 *startptr
= found_sal
.pc
;
2305 *endptr
= found_sal
.pc
;
2309 *startptr
= found_sal
.pc
;
2310 *endptr
= found_sal
.end
;
2315 /* Given a line table and a line number, return the index into the line
2316 table for the pc of the nearest line whose number is >= the specified one.
2317 Return -1 if none is found. The value is >= 0 if it is an index.
2319 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2322 find_line_common (struct linetable
*l
, int lineno
,
2328 /* BEST is the smallest linenumber > LINENO so far seen,
2329 or 0 if none has been seen so far.
2330 BEST_INDEX identifies the item for it. */
2332 int best_index
= -1;
2343 for (i
= 0; i
< len
; i
++)
2345 struct linetable_entry
*item
= &(l
->item
[i
]);
2347 if (item
->line
== lineno
)
2349 /* Return the first (lowest address) entry which matches. */
2354 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2361 /* If we got here, we didn't get an exact match. */
2366 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2368 struct symtab_and_line sal
;
2370 sal
= find_pc_line (pc
, 0);
2373 return sal
.symtab
!= 0;
2376 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2377 address for that function that has an entry in SYMTAB's line info
2378 table. If such an entry cannot be found, return FUNC_ADDR
2381 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2383 CORE_ADDR func_start
, func_end
;
2384 struct linetable
*l
;
2387 /* Give up if this symbol has no lineinfo table. */
2388 l
= LINETABLE (symtab
);
2392 /* Get the range for the function's PC values, or give up if we
2393 cannot, for some reason. */
2394 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2397 /* Linetable entries are ordered by PC values, see the commentary in
2398 symtab.h where `struct linetable' is defined. Thus, the first
2399 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2400 address we are looking for. */
2401 for (i
= 0; i
< l
->nitems
; i
++)
2403 struct linetable_entry
*item
= &(l
->item
[i
]);
2405 /* Don't use line numbers of zero, they mark special entries in
2406 the table. See the commentary on symtab.h before the
2407 definition of struct linetable. */
2408 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2415 /* Given a function symbol SYM, find the symtab and line for the start
2417 If the argument FUNFIRSTLINE is nonzero, we want the first line
2418 of real code inside the function. */
2420 struct symtab_and_line
2421 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2423 struct symtab_and_line sal
;
2425 fixup_symbol_section (sym
, NULL
);
2426 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2427 SYMBOL_OBJ_SECTION (sym
), 0);
2429 /* We always should have a line for the function start address.
2430 If we don't, something is odd. Create a plain SAL refering
2431 just the PC and hope that skip_prologue_sal (if requested)
2432 can find a line number for after the prologue. */
2433 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2436 sal
.pspace
= current_program_space
;
2437 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2438 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2442 skip_prologue_sal (&sal
);
2447 /* Adjust SAL to the first instruction past the function prologue.
2448 If the PC was explicitly specified, the SAL is not changed.
2449 If the line number was explicitly specified, at most the SAL's PC
2450 is updated. If SAL is already past the prologue, then do nothing. */
2452 skip_prologue_sal (struct symtab_and_line
*sal
)
2455 struct symtab_and_line start_sal
;
2456 struct cleanup
*old_chain
;
2458 struct obj_section
*section
;
2460 struct objfile
*objfile
;
2461 struct gdbarch
*gdbarch
;
2462 struct block
*b
, *function_block
;
2464 /* Do not change the SAL is PC was specified explicitly. */
2465 if (sal
->explicit_pc
)
2468 old_chain
= save_current_space_and_thread ();
2469 switch_to_program_space_and_thread (sal
->pspace
);
2471 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2474 fixup_symbol_section (sym
, NULL
);
2476 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2477 section
= SYMBOL_OBJ_SECTION (sym
);
2478 name
= SYMBOL_LINKAGE_NAME (sym
);
2479 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2483 struct minimal_symbol
*msymbol
2484 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2486 if (msymbol
== NULL
)
2488 do_cleanups (old_chain
);
2492 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2493 section
= SYMBOL_OBJ_SECTION (msymbol
);
2494 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2495 objfile
= msymbol_objfile (msymbol
);
2498 gdbarch
= get_objfile_arch (objfile
);
2500 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2501 so that gdbarch_skip_prologue has something unique to work on. */
2502 if (section_is_overlay (section
) && !section_is_mapped (section
))
2503 pc
= overlay_unmapped_address (pc
, section
);
2505 /* Skip "first line" of function (which is actually its prologue). */
2506 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2507 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2509 /* For overlays, map pc back into its mapped VMA range. */
2510 pc
= overlay_mapped_address (pc
, section
);
2512 /* Calculate line number. */
2513 start_sal
= find_pc_sect_line (pc
, section
, 0);
2515 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2516 line is still part of the same function. */
2517 if (start_sal
.pc
!= pc
2518 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2519 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2520 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2521 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2523 /* First pc of next line */
2525 /* Recalculate the line number (might not be N+1). */
2526 start_sal
= find_pc_sect_line (pc
, section
, 0);
2529 /* On targets with executable formats that don't have a concept of
2530 constructors (ELF with .init has, PE doesn't), gcc emits a call
2531 to `__main' in `main' between the prologue and before user
2533 if (gdbarch_skip_main_prologue_p (gdbarch
)
2534 && name
&& strcmp (name
, "main") == 0)
2536 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2537 /* Recalculate the line number (might not be N+1). */
2538 start_sal
= find_pc_sect_line (pc
, section
, 0);
2541 /* If we still don't have a valid source line, try to find the first
2542 PC in the lineinfo table that belongs to the same function. This
2543 happens with COFF debug info, which does not seem to have an
2544 entry in lineinfo table for the code after the prologue which has
2545 no direct relation to source. For example, this was found to be
2546 the case with the DJGPP target using "gcc -gcoff" when the
2547 compiler inserted code after the prologue to make sure the stack
2549 if (sym
&& start_sal
.symtab
== NULL
)
2551 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2552 /* Recalculate the line number. */
2553 start_sal
= find_pc_sect_line (pc
, section
, 0);
2556 do_cleanups (old_chain
);
2558 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2559 forward SAL to the end of the prologue. */
2564 sal
->section
= section
;
2566 /* Unless the explicit_line flag was set, update the SAL line
2567 and symtab to correspond to the modified PC location. */
2568 if (sal
->explicit_line
)
2571 sal
->symtab
= start_sal
.symtab
;
2572 sal
->line
= start_sal
.line
;
2573 sal
->end
= start_sal
.end
;
2575 /* Check if we are now inside an inlined function. If we can,
2576 use the call site of the function instead. */
2577 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2578 function_block
= NULL
;
2581 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2583 else if (BLOCK_FUNCTION (b
) != NULL
)
2585 b
= BLOCK_SUPERBLOCK (b
);
2587 if (function_block
!= NULL
2588 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2590 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2591 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2595 /* If P is of the form "operator[ \t]+..." where `...' is
2596 some legitimate operator text, return a pointer to the
2597 beginning of the substring of the operator text.
2598 Otherwise, return "". */
2600 operator_chars (char *p
, char **end
)
2603 if (strncmp (p
, "operator", 8))
2607 /* Don't get faked out by `operator' being part of a longer
2609 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2612 /* Allow some whitespace between `operator' and the operator symbol. */
2613 while (*p
== ' ' || *p
== '\t')
2616 /* Recognize 'operator TYPENAME'. */
2618 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2622 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2631 case '\\': /* regexp quoting */
2634 if (p
[2] == '=') /* 'operator\*=' */
2636 else /* 'operator\*' */
2640 else if (p
[1] == '[')
2643 error (_("mismatched quoting on brackets, "
2644 "try 'operator\\[\\]'"));
2645 else if (p
[2] == '\\' && p
[3] == ']')
2647 *end
= p
+ 4; /* 'operator\[\]' */
2651 error (_("nothing is allowed between '[' and ']'"));
2655 /* Gratuitous qoute: skip it and move on. */
2677 if (p
[0] == '-' && p
[1] == '>')
2679 /* Struct pointer member operator 'operator->'. */
2682 *end
= p
+ 3; /* 'operator->*' */
2685 else if (p
[2] == '\\')
2687 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2692 *end
= p
+ 2; /* 'operator->' */
2696 if (p
[1] == '=' || p
[1] == p
[0])
2707 error (_("`operator ()' must be specified "
2708 "without whitespace in `()'"));
2713 error (_("`operator ?:' must be specified "
2714 "without whitespace in `?:'"));
2719 error (_("`operator []' must be specified "
2720 "without whitespace in `[]'"));
2724 error (_("`operator %s' not supported"), p
);
2733 /* If FILE is not already in the table of files, return zero;
2734 otherwise return non-zero. Optionally add FILE to the table if ADD
2735 is non-zero. If *FIRST is non-zero, forget the old table
2738 filename_seen (const char *file
, int add
, int *first
)
2740 /* Table of files seen so far. */
2741 static const char **tab
= NULL
;
2742 /* Allocated size of tab in elements.
2743 Start with one 256-byte block (when using GNU malloc.c).
2744 24 is the malloc overhead when range checking is in effect. */
2745 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2746 /* Current size of tab in elements. */
2747 static int tab_cur_size
;
2753 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2757 /* Is FILE in tab? */
2758 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2759 if (strcmp (*p
, file
) == 0)
2762 /* No; maybe add it to tab. */
2765 if (tab_cur_size
== tab_alloc_size
)
2767 tab_alloc_size
*= 2;
2768 tab
= (const char **) xrealloc ((char *) tab
,
2769 tab_alloc_size
* sizeof (*tab
));
2771 tab
[tab_cur_size
++] = file
;
2777 /* Slave routine for sources_info. Force line breaks at ,'s.
2778 NAME is the name to print and *FIRST is nonzero if this is the first
2779 name printed. Set *FIRST to zero. */
2781 output_source_filename (const char *name
, int *first
)
2783 /* Since a single source file can result in several partial symbol
2784 tables, we need to avoid printing it more than once. Note: if
2785 some of the psymtabs are read in and some are not, it gets
2786 printed both under "Source files for which symbols have been
2787 read" and "Source files for which symbols will be read in on
2788 demand". I consider this a reasonable way to deal with the
2789 situation. I'm not sure whether this can also happen for
2790 symtabs; it doesn't hurt to check. */
2792 /* Was NAME already seen? */
2793 if (filename_seen (name
, 1, first
))
2795 /* Yes; don't print it again. */
2798 /* No; print it and reset *FIRST. */
2805 printf_filtered (", ");
2809 fputs_filtered (name
, gdb_stdout
);
2812 /* A callback for map_partial_symbol_filenames. */
2814 output_partial_symbol_filename (const char *fullname
, const char *filename
,
2817 output_source_filename (fullname
? fullname
: filename
, data
);
2821 sources_info (char *ignore
, int from_tty
)
2824 struct objfile
*objfile
;
2827 if (!have_full_symbols () && !have_partial_symbols ())
2829 error (_("No symbol table is loaded. Use the \"file\" command."));
2832 printf_filtered ("Source files for which symbols have been read in:\n\n");
2835 ALL_SYMTABS (objfile
, s
)
2837 const char *fullname
= symtab_to_fullname (s
);
2839 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2841 printf_filtered ("\n\n");
2843 printf_filtered ("Source files for which symbols "
2844 "will be read in on demand:\n\n");
2847 map_partial_symbol_filenames (output_partial_symbol_filename
, &first
);
2848 printf_filtered ("\n");
2852 file_matches (const char *file
, char *files
[], int nfiles
)
2856 if (file
!= NULL
&& nfiles
!= 0)
2858 for (i
= 0; i
< nfiles
; i
++)
2860 if (strcmp (files
[i
], lbasename (file
)) == 0)
2864 else if (nfiles
== 0)
2869 /* Free any memory associated with a search. */
2871 free_search_symbols (struct symbol_search
*symbols
)
2873 struct symbol_search
*p
;
2874 struct symbol_search
*next
;
2876 for (p
= symbols
; p
!= NULL
; p
= next
)
2884 do_free_search_symbols_cleanup (void *symbols
)
2886 free_search_symbols (symbols
);
2890 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2892 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2895 /* Helper function for sort_search_symbols and qsort. Can only
2896 sort symbols, not minimal symbols. */
2898 compare_search_syms (const void *sa
, const void *sb
)
2900 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2901 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2903 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2904 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2907 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2908 prevtail where it is, but update its next pointer to point to
2909 the first of the sorted symbols. */
2910 static struct symbol_search
*
2911 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2913 struct symbol_search
**symbols
, *symp
, *old_next
;
2916 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2918 symp
= prevtail
->next
;
2919 for (i
= 0; i
< nfound
; i
++)
2924 /* Generally NULL. */
2927 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2928 compare_search_syms
);
2931 for (i
= 0; i
< nfound
; i
++)
2933 symp
->next
= symbols
[i
];
2936 symp
->next
= old_next
;
2942 /* An object of this type is passed as the user_data to the
2943 expand_symtabs_matching method. */
2944 struct search_symbols_data
2951 /* A callback for expand_symtabs_matching. */
2953 search_symbols_file_matches (const char *filename
, void *user_data
)
2955 struct search_symbols_data
*data
= user_data
;
2957 return file_matches (filename
, data
->files
, data
->nfiles
);
2960 /* A callback for expand_symtabs_matching. */
2962 search_symbols_name_matches (const char *symname
, void *user_data
)
2964 struct search_symbols_data
*data
= user_data
;
2966 return data
->regexp
== NULL
|| re_exec (symname
);
2969 /* Search the symbol table for matches to the regular expression REGEXP,
2970 returning the results in *MATCHES.
2972 Only symbols of KIND are searched:
2973 FUNCTIONS_DOMAIN - search all functions
2974 TYPES_DOMAIN - search all type names
2975 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2976 and constants (enums)
2978 free_search_symbols should be called when *MATCHES is no longer needed.
2980 The results are sorted locally; each symtab's global and static blocks are
2981 separately alphabetized. */
2984 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
2985 struct symbol_search
**matches
)
2988 struct blockvector
*bv
;
2991 struct dict_iterator iter
;
2993 struct objfile
*objfile
;
2994 struct minimal_symbol
*msymbol
;
2997 static const enum minimal_symbol_type types
[]
2998 = {mst_data
, mst_text
, mst_abs
, mst_unknown
};
2999 static const enum minimal_symbol_type types2
[]
3000 = {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
3001 static const enum minimal_symbol_type types3
[]
3002 = {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
3003 static const enum minimal_symbol_type types4
[]
3004 = {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
3005 enum minimal_symbol_type ourtype
;
3006 enum minimal_symbol_type ourtype2
;
3007 enum minimal_symbol_type ourtype3
;
3008 enum minimal_symbol_type ourtype4
;
3009 struct symbol_search
*sr
;
3010 struct symbol_search
*psr
;
3011 struct symbol_search
*tail
;
3012 struct cleanup
*old_chain
= NULL
;
3013 struct search_symbols_data datum
;
3015 if (kind
< VARIABLES_DOMAIN
)
3016 error (_("must search on specific domain"));
3018 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
3019 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
3020 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
3021 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
3023 sr
= *matches
= NULL
;
3028 /* Make sure spacing is right for C++ operators.
3029 This is just a courtesy to make the matching less sensitive
3030 to how many spaces the user leaves between 'operator'
3031 and <TYPENAME> or <OPERATOR>. */
3033 char *opname
= operator_chars (regexp
, &opend
);
3037 int fix
= -1; /* -1 means ok; otherwise number of
3040 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3042 /* There should 1 space between 'operator' and 'TYPENAME'. */
3043 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3048 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3049 if (opname
[-1] == ' ')
3052 /* If wrong number of spaces, fix it. */
3055 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3057 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3062 if (0 != (val
= re_comp (regexp
)))
3063 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3066 /* Search through the partial symtabs *first* for all symbols
3067 matching the regexp. That way we don't have to reproduce all of
3068 the machinery below. */
3070 datum
.nfiles
= nfiles
;
3071 datum
.files
= files
;
3072 datum
.regexp
= regexp
;
3073 ALL_OBJFILES (objfile
)
3076 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3077 search_symbols_file_matches
,
3078 search_symbols_name_matches
,
3083 /* Here, we search through the minimal symbol tables for functions
3084 and variables that match, and force their symbols to be read.
3085 This is in particular necessary for demangled variable names,
3086 which are no longer put into the partial symbol tables.
3087 The symbol will then be found during the scan of symtabs below.
3089 For functions, find_pc_symtab should succeed if we have debug info
3090 for the function, for variables we have to call lookup_symbol
3091 to determine if the variable has debug info.
3092 If the lookup fails, set found_misc so that we will rescan to print
3093 any matching symbols without debug info. */
3095 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3097 ALL_MSYMBOLS (objfile
, msymbol
)
3101 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3102 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3103 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3104 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3107 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3109 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3111 /* FIXME: carlton/2003-02-04: Given that the
3112 semantics of lookup_symbol keeps on changing
3113 slightly, it would be a nice idea if we had a
3114 function lookup_symbol_minsym that found the
3115 symbol associated to a given minimal symbol (if
3117 if (kind
== FUNCTIONS_DOMAIN
3118 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3119 (struct block
*) NULL
,
3129 ALL_PRIMARY_SYMTABS (objfile
, s
)
3131 bv
= BLOCKVECTOR (s
);
3132 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3134 struct symbol_search
*prevtail
= tail
;
3137 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3138 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3140 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3144 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3146 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3147 && ((kind
== VARIABLES_DOMAIN
3148 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3149 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3150 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3151 /* LOC_CONST can be used for more than just enums,
3152 e.g., c++ static const members.
3153 We only want to skip enums here. */
3154 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3155 && TYPE_CODE (SYMBOL_TYPE (sym
))
3157 || (kind
== FUNCTIONS_DOMAIN
3158 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3159 || (kind
== TYPES_DOMAIN
3160 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3163 psr
= (struct symbol_search
*)
3164 xmalloc (sizeof (struct symbol_search
));
3166 psr
->symtab
= real_symtab
;
3168 psr
->msymbol
= NULL
;
3180 if (prevtail
== NULL
)
3182 struct symbol_search dummy
;
3185 tail
= sort_search_symbols (&dummy
, nfound
);
3188 old_chain
= make_cleanup_free_search_symbols (sr
);
3191 tail
= sort_search_symbols (prevtail
, nfound
);
3196 /* If there are no eyes, avoid all contact. I mean, if there are
3197 no debug symbols, then print directly from the msymbol_vector. */
3199 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3201 ALL_MSYMBOLS (objfile
, msymbol
)
3205 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3206 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3207 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3208 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3211 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3213 /* Functions: Look up by address. */
3214 if (kind
!= FUNCTIONS_DOMAIN
||
3215 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3217 /* Variables/Absolutes: Look up by name. */
3218 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3219 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3223 psr
= (struct symbol_search
*)
3224 xmalloc (sizeof (struct symbol_search
));
3226 psr
->msymbol
= msymbol
;
3233 old_chain
= make_cleanup_free_search_symbols (sr
);
3247 discard_cleanups (old_chain
);
3250 /* Helper function for symtab_symbol_info, this function uses
3251 the data returned from search_symbols() to print information
3252 regarding the match to gdb_stdout. */
3255 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3256 int block
, char *last
)
3258 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3260 fputs_filtered ("\nFile ", gdb_stdout
);
3261 fputs_filtered (s
->filename
, gdb_stdout
);
3262 fputs_filtered (":\n", gdb_stdout
);
3265 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3266 printf_filtered ("static ");
3268 /* Typedef that is not a C++ class. */
3269 if (kind
== TYPES_DOMAIN
3270 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3271 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3272 /* variable, func, or typedef-that-is-c++-class. */
3273 else if (kind
< TYPES_DOMAIN
||
3274 (kind
== TYPES_DOMAIN
&&
3275 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3277 type_print (SYMBOL_TYPE (sym
),
3278 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3279 ? "" : SYMBOL_PRINT_NAME (sym
)),
3282 printf_filtered (";\n");
3286 /* This help function for symtab_symbol_info() prints information
3287 for non-debugging symbols to gdb_stdout. */
3290 print_msymbol_info (struct minimal_symbol
*msymbol
)
3292 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3295 if (gdbarch_addr_bit (gdbarch
) <= 32)
3296 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3297 & (CORE_ADDR
) 0xffffffff,
3300 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3302 printf_filtered ("%s %s\n",
3303 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3306 /* This is the guts of the commands "info functions", "info types", and
3307 "info variables". It calls search_symbols to find all matches and then
3308 print_[m]symbol_info to print out some useful information about the
3312 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3314 static const char * const classnames
[] =
3315 {"variable", "function", "type", "method"};
3316 struct symbol_search
*symbols
;
3317 struct symbol_search
*p
;
3318 struct cleanup
*old_chain
;
3319 char *last_filename
= NULL
;
3322 /* Must make sure that if we're interrupted, symbols gets freed. */
3323 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3324 old_chain
= make_cleanup_free_search_symbols (symbols
);
3326 printf_filtered (regexp
3327 ? "All %ss matching regular expression \"%s\":\n"
3328 : "All defined %ss:\n",
3329 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3331 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3335 if (p
->msymbol
!= NULL
)
3339 printf_filtered ("\nNon-debugging symbols:\n");
3342 print_msymbol_info (p
->msymbol
);
3346 print_symbol_info (kind
,
3351 last_filename
= p
->symtab
->filename
;
3355 do_cleanups (old_chain
);
3359 variables_info (char *regexp
, int from_tty
)
3361 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3365 functions_info (char *regexp
, int from_tty
)
3367 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3372 types_info (char *regexp
, int from_tty
)
3374 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3377 /* Breakpoint all functions matching regular expression. */
3380 rbreak_command_wrapper (char *regexp
, int from_tty
)
3382 rbreak_command (regexp
, from_tty
);
3385 /* A cleanup function that calls end_rbreak_breakpoints. */
3388 do_end_rbreak_breakpoints (void *ignore
)
3390 end_rbreak_breakpoints ();
3394 rbreak_command (char *regexp
, int from_tty
)
3396 struct symbol_search
*ss
;
3397 struct symbol_search
*p
;
3398 struct cleanup
*old_chain
;
3399 char *string
= NULL
;
3401 char **files
= NULL
;
3406 char *colon
= strchr (regexp
, ':');
3408 if (colon
&& *(colon
+ 1) != ':')
3413 colon_index
= colon
- regexp
;
3414 file_name
= alloca (colon_index
+ 1);
3415 memcpy (file_name
, regexp
, colon_index
);
3416 file_name
[colon_index
--] = 0;
3417 while (isspace (file_name
[colon_index
]))
3418 file_name
[colon_index
--] = 0;
3422 while (isspace (*regexp
)) regexp
++;
3426 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3427 old_chain
= make_cleanup_free_search_symbols (ss
);
3428 make_cleanup (free_current_contents
, &string
);
3430 start_rbreak_breakpoints ();
3431 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3432 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3434 if (p
->msymbol
== NULL
)
3436 int newlen
= (strlen (p
->symtab
->filename
)
3437 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3442 string
= xrealloc (string
, newlen
);
3445 strcpy (string
, p
->symtab
->filename
);
3446 strcat (string
, ":'");
3447 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3448 strcat (string
, "'");
3449 break_command (string
, from_tty
);
3450 print_symbol_info (FUNCTIONS_DOMAIN
,
3454 p
->symtab
->filename
);
3458 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3462 string
= xrealloc (string
, newlen
);
3465 strcpy (string
, "'");
3466 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3467 strcat (string
, "'");
3469 break_command (string
, from_tty
);
3470 printf_filtered ("<function, no debug info> %s;\n",
3471 SYMBOL_PRINT_NAME (p
->msymbol
));
3475 do_cleanups (old_chain
);
3479 /* Helper routine for make_symbol_completion_list. */
3481 static int return_val_size
;
3482 static int return_val_index
;
3483 static char **return_val
;
3485 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3486 completion_list_add_name \
3487 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3489 /* Test to see if the symbol specified by SYMNAME (which is already
3490 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3491 characters. If so, add it to the current completion list. */
3494 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3495 char *text
, char *word
)
3499 /* Clip symbols that cannot match. */
3501 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3506 /* We have a match for a completion, so add SYMNAME to the current list
3507 of matches. Note that the name is moved to freshly malloc'd space. */
3512 if (word
== sym_text
)
3514 new = xmalloc (strlen (symname
) + 5);
3515 strcpy (new, symname
);
3517 else if (word
> sym_text
)
3519 /* Return some portion of symname. */
3520 new = xmalloc (strlen (symname
) + 5);
3521 strcpy (new, symname
+ (word
- sym_text
));
3525 /* Return some of SYM_TEXT plus symname. */
3526 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3527 strncpy (new, word
, sym_text
- word
);
3528 new[sym_text
- word
] = '\0';
3529 strcat (new, symname
);
3532 if (return_val_index
+ 3 > return_val_size
)
3534 newsize
= (return_val_size
*= 2) * sizeof (char *);
3535 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3537 return_val
[return_val_index
++] = new;
3538 return_val
[return_val_index
] = NULL
;
3542 /* ObjC: In case we are completing on a selector, look as the msymbol
3543 again and feed all the selectors into the mill. */
3546 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3547 int sym_text_len
, char *text
, char *word
)
3549 static char *tmp
= NULL
;
3550 static unsigned int tmplen
= 0;
3552 char *method
, *category
, *selector
;
3555 method
= SYMBOL_NATURAL_NAME (msymbol
);
3557 /* Is it a method? */
3558 if ((method
[0] != '-') && (method
[0] != '+'))
3561 if (sym_text
[0] == '[')
3562 /* Complete on shortened method method. */
3563 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3565 while ((strlen (method
) + 1) >= tmplen
)
3571 tmp
= xrealloc (tmp
, tmplen
);
3573 selector
= strchr (method
, ' ');
3574 if (selector
!= NULL
)
3577 category
= strchr (method
, '(');
3579 if ((category
!= NULL
) && (selector
!= NULL
))
3581 memcpy (tmp
, method
, (category
- method
));
3582 tmp
[category
- method
] = ' ';
3583 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3584 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3585 if (sym_text
[0] == '[')
3586 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3589 if (selector
!= NULL
)
3591 /* Complete on selector only. */
3592 strcpy (tmp
, selector
);
3593 tmp2
= strchr (tmp
, ']');
3597 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3601 /* Break the non-quoted text based on the characters which are in
3602 symbols. FIXME: This should probably be language-specific. */
3605 language_search_unquoted_string (char *text
, char *p
)
3607 for (; p
> text
; --p
)
3609 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3613 if ((current_language
->la_language
== language_objc
))
3615 if (p
[-1] == ':') /* Might be part of a method name. */
3617 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3618 p
-= 2; /* Beginning of a method name. */
3619 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3620 { /* Might be part of a method name. */
3623 /* Seeing a ' ' or a '(' is not conclusive evidence
3624 that we are in the middle of a method name. However,
3625 finding "-[" or "+[" should be pretty un-ambiguous.
3626 Unfortunately we have to find it now to decide. */
3629 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3630 t
[-1] == ' ' || t
[-1] == ':' ||
3631 t
[-1] == '(' || t
[-1] == ')')
3636 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3637 p
= t
- 2; /* Method name detected. */
3638 /* Else we leave with p unchanged. */
3648 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
3649 int sym_text_len
, char *text
, char *word
)
3651 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3653 struct type
*t
= SYMBOL_TYPE (sym
);
3654 enum type_code c
= TYPE_CODE (t
);
3657 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3658 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3659 if (TYPE_FIELD_NAME (t
, j
))
3660 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3661 sym_text
, sym_text_len
, text
, word
);
3665 /* Type of the user_data argument passed to add_macro_name or
3666 add_partial_symbol_name. The contents are simply whatever is
3667 needed by completion_list_add_name. */
3668 struct add_name_data
3676 /* A callback used with macro_for_each and macro_for_each_in_scope.
3677 This adds a macro's name to the current completion list. */
3679 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
3682 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3684 completion_list_add_name ((char *) name
,
3685 datum
->sym_text
, datum
->sym_text_len
,
3686 datum
->text
, datum
->word
);
3689 /* A callback for map_partial_symbol_names. */
3691 add_partial_symbol_name (const char *name
, void *user_data
)
3693 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3695 completion_list_add_name ((char *) name
,
3696 datum
->sym_text
, datum
->sym_text_len
,
3697 datum
->text
, datum
->word
);
3701 default_make_symbol_completion_list_break_on (char *text
, char *word
,
3702 const char *break_on
)
3704 /* Problem: All of the symbols have to be copied because readline
3705 frees them. I'm not going to worry about this; hopefully there
3706 won't be that many. */
3710 struct minimal_symbol
*msymbol
;
3711 struct objfile
*objfile
;
3713 const struct block
*surrounding_static_block
, *surrounding_global_block
;
3714 struct dict_iterator iter
;
3715 /* The symbol we are completing on. Points in same buffer as text. */
3717 /* Length of sym_text. */
3719 struct add_name_data datum
;
3721 /* Now look for the symbol we are supposed to complete on. */
3725 char *quote_pos
= NULL
;
3727 /* First see if this is a quoted string. */
3729 for (p
= text
; *p
!= '\0'; ++p
)
3731 if (quote_found
!= '\0')
3733 if (*p
== quote_found
)
3734 /* Found close quote. */
3736 else if (*p
== '\\' && p
[1] == quote_found
)
3737 /* A backslash followed by the quote character
3738 doesn't end the string. */
3741 else if (*p
== '\'' || *p
== '"')
3747 if (quote_found
== '\'')
3748 /* A string within single quotes can be a symbol, so complete on it. */
3749 sym_text
= quote_pos
+ 1;
3750 else if (quote_found
== '"')
3751 /* A double-quoted string is never a symbol, nor does it make sense
3752 to complete it any other way. */
3754 return_val
= (char **) xmalloc (sizeof (char *));
3755 return_val
[0] = NULL
;
3760 /* It is not a quoted string. Break it based on the characters
3761 which are in symbols. */
3764 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
3765 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
3774 sym_text_len
= strlen (sym_text
);
3776 return_val_size
= 100;
3777 return_val_index
= 0;
3778 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3779 return_val
[0] = NULL
;
3781 datum
.sym_text
= sym_text
;
3782 datum
.sym_text_len
= sym_text_len
;
3786 /* Look through the partial symtabs for all symbols which begin
3787 by matching SYM_TEXT. Add each one that you find to the list. */
3788 map_partial_symbol_names (add_partial_symbol_name
, &datum
);
3790 /* At this point scan through the misc symbol vectors and add each
3791 symbol you find to the list. Eventually we want to ignore
3792 anything that isn't a text symbol (everything else will be
3793 handled by the psymtab code above). */
3795 ALL_MSYMBOLS (objfile
, msymbol
)
3798 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3800 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3803 /* Search upwards from currently selected frame (so that we can
3804 complete on local vars). Also catch fields of types defined in
3805 this places which match our text string. Only complete on types
3806 visible from current context. */
3808 b
= get_selected_block (0);
3809 surrounding_static_block
= block_static_block (b
);
3810 surrounding_global_block
= block_global_block (b
);
3811 if (surrounding_static_block
!= NULL
)
3812 while (b
!= surrounding_static_block
)
3816 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3818 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
3820 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
3824 /* Stop when we encounter an enclosing function. Do not stop for
3825 non-inlined functions - the locals of the enclosing function
3826 are in scope for a nested function. */
3827 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3829 b
= BLOCK_SUPERBLOCK (b
);
3832 /* Add fields from the file's types; symbols will be added below. */
3834 if (surrounding_static_block
!= NULL
)
3835 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
3836 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3838 if (surrounding_global_block
!= NULL
)
3839 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
3840 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3842 /* Go through the symtabs and check the externs and statics for
3843 symbols which match. */
3845 ALL_PRIMARY_SYMTABS (objfile
, s
)
3848 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3849 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3851 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3855 ALL_PRIMARY_SYMTABS (objfile
, s
)
3858 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3859 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3861 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3865 if (current_language
->la_macro_expansion
== macro_expansion_c
)
3867 struct macro_scope
*scope
;
3869 /* Add any macros visible in the default scope. Note that this
3870 may yield the occasional wrong result, because an expression
3871 might be evaluated in a scope other than the default. For
3872 example, if the user types "break file:line if <TAB>", the
3873 resulting expression will be evaluated at "file:line" -- but
3874 at there does not seem to be a way to detect this at
3876 scope
= default_macro_scope ();
3879 macro_for_each_in_scope (scope
->file
, scope
->line
,
3880 add_macro_name
, &datum
);
3884 /* User-defined macros are always visible. */
3885 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
3888 return (return_val
);
3892 default_make_symbol_completion_list (char *text
, char *word
)
3894 return default_make_symbol_completion_list_break_on (text
, word
, "");
3897 /* Return a NULL terminated array of all symbols (regardless of class)
3898 which begin by matching TEXT. If the answer is no symbols, then
3899 the return value is an array which contains only a NULL pointer. */
3902 make_symbol_completion_list (char *text
, char *word
)
3904 return current_language
->la_make_symbol_completion_list (text
, word
);
3907 /* Like make_symbol_completion_list, but suitable for use as a
3908 completion function. */
3911 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
3912 char *text
, char *word
)
3914 return make_symbol_completion_list (text
, word
);
3917 /* Like make_symbol_completion_list, but returns a list of symbols
3918 defined in a source file FILE. */
3921 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3926 struct dict_iterator iter
;
3927 /* The symbol we are completing on. Points in same buffer as text. */
3929 /* Length of sym_text. */
3932 /* Now look for the symbol we are supposed to complete on.
3933 FIXME: This should be language-specific. */
3937 char *quote_pos
= NULL
;
3939 /* First see if this is a quoted string. */
3941 for (p
= text
; *p
!= '\0'; ++p
)
3943 if (quote_found
!= '\0')
3945 if (*p
== quote_found
)
3946 /* Found close quote. */
3948 else if (*p
== '\\' && p
[1] == quote_found
)
3949 /* A backslash followed by the quote character
3950 doesn't end the string. */
3953 else if (*p
== '\'' || *p
== '"')
3959 if (quote_found
== '\'')
3960 /* A string within single quotes can be a symbol, so complete on it. */
3961 sym_text
= quote_pos
+ 1;
3962 else if (quote_found
== '"')
3963 /* A double-quoted string is never a symbol, nor does it make sense
3964 to complete it any other way. */
3966 return_val
= (char **) xmalloc (sizeof (char *));
3967 return_val
[0] = NULL
;
3972 /* Not a quoted string. */
3973 sym_text
= language_search_unquoted_string (text
, p
);
3977 sym_text_len
= strlen (sym_text
);
3979 return_val_size
= 10;
3980 return_val_index
= 0;
3981 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3982 return_val
[0] = NULL
;
3984 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3986 s
= lookup_symtab (srcfile
);
3989 /* Maybe they typed the file with leading directories, while the
3990 symbol tables record only its basename. */
3991 const char *tail
= lbasename (srcfile
);
3994 s
= lookup_symtab (tail
);
3997 /* If we have no symtab for that file, return an empty list. */
3999 return (return_val
);
4001 /* Go through this symtab and check the externs and statics for
4002 symbols which match. */
4004 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4005 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4007 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4010 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4011 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4013 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4016 return (return_val
);
4019 /* A helper function for make_source_files_completion_list. It adds
4020 another file name to a list of possible completions, growing the
4021 list as necessary. */
4024 add_filename_to_list (const char *fname
, char *text
, char *word
,
4025 char ***list
, int *list_used
, int *list_alloced
)
4028 size_t fnlen
= strlen (fname
);
4030 if (*list_used
+ 1 >= *list_alloced
)
4033 *list
= (char **) xrealloc ((char *) *list
,
4034 *list_alloced
* sizeof (char *));
4039 /* Return exactly fname. */
4040 new = xmalloc (fnlen
+ 5);
4041 strcpy (new, fname
);
4043 else if (word
> text
)
4045 /* Return some portion of fname. */
4046 new = xmalloc (fnlen
+ 5);
4047 strcpy (new, fname
+ (word
- text
));
4051 /* Return some of TEXT plus fname. */
4052 new = xmalloc (fnlen
+ (text
- word
) + 5);
4053 strncpy (new, word
, text
- word
);
4054 new[text
- word
] = '\0';
4055 strcat (new, fname
);
4057 (*list
)[*list_used
] = new;
4058 (*list
)[++*list_used
] = NULL
;
4062 not_interesting_fname (const char *fname
)
4064 static const char *illegal_aliens
[] = {
4065 "_globals_", /* inserted by coff_symtab_read */
4070 for (i
= 0; illegal_aliens
[i
]; i
++)
4072 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
4078 /* An object of this type is passed as the user_data argument to
4079 map_partial_symbol_filenames. */
4080 struct add_partial_filename_data
4091 /* A callback for map_partial_symbol_filenames. */
4093 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4096 struct add_partial_filename_data
*data
= user_data
;
4098 if (not_interesting_fname (filename
))
4100 if (!filename_seen (filename
, 1, data
->first
)
4101 #if HAVE_DOS_BASED_FILE_SYSTEM
4102 && strncasecmp (filename
, data
->text
, data
->text_len
) == 0
4104 && strncmp (filename
, data
->text
, data
->text_len
) == 0
4108 /* This file matches for a completion; add it to the
4109 current list of matches. */
4110 add_filename_to_list (filename
, data
->text
, data
->word
,
4111 data
->list
, data
->list_used
, data
->list_alloced
);
4115 const char *base_name
= lbasename (filename
);
4117 if (base_name
!= filename
4118 && !filename_seen (base_name
, 1, data
->first
)
4119 #if HAVE_DOS_BASED_FILE_SYSTEM
4120 && strncasecmp (base_name
, data
->text
, data
->text_len
) == 0
4122 && strncmp (base_name
, data
->text
, data
->text_len
) == 0
4125 add_filename_to_list (base_name
, data
->text
, data
->word
,
4126 data
->list
, data
->list_used
, data
->list_alloced
);
4130 /* Return a NULL terminated array of all source files whose names
4131 begin with matching TEXT. The file names are looked up in the
4132 symbol tables of this program. If the answer is no matchess, then
4133 the return value is an array which contains only a NULL pointer. */
4136 make_source_files_completion_list (char *text
, char *word
)
4139 struct objfile
*objfile
;
4141 int list_alloced
= 1;
4143 size_t text_len
= strlen (text
);
4144 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4145 const char *base_name
;
4146 struct add_partial_filename_data datum
;
4150 if (!have_full_symbols () && !have_partial_symbols ())
4153 ALL_SYMTABS (objfile
, s
)
4155 if (not_interesting_fname (s
->filename
))
4157 if (!filename_seen (s
->filename
, 1, &first
)
4158 #if HAVE_DOS_BASED_FILE_SYSTEM
4159 && strncasecmp (s
->filename
, text
, text_len
) == 0
4161 && strncmp (s
->filename
, text
, text_len
) == 0
4165 /* This file matches for a completion; add it to the current
4167 add_filename_to_list (s
->filename
, text
, word
,
4168 &list
, &list_used
, &list_alloced
);
4172 /* NOTE: We allow the user to type a base name when the
4173 debug info records leading directories, but not the other
4174 way around. This is what subroutines of breakpoint
4175 command do when they parse file names. */
4176 base_name
= lbasename (s
->filename
);
4177 if (base_name
!= s
->filename
4178 && !filename_seen (base_name
, 1, &first
)
4179 #if HAVE_DOS_BASED_FILE_SYSTEM
4180 && strncasecmp (base_name
, text
, text_len
) == 0
4182 && strncmp (base_name
, text
, text_len
) == 0
4185 add_filename_to_list (base_name
, text
, word
,
4186 &list
, &list_used
, &list_alloced
);
4190 datum
.first
= &first
;
4193 datum
.text_len
= text_len
;
4195 datum
.list_used
= &list_used
;
4196 datum
.list_alloced
= &list_alloced
;
4197 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
);
4202 /* Determine if PC is in the prologue of a function. The prologue is the area
4203 between the first instruction of a function, and the first executable line.
4204 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4206 If non-zero, func_start is where we think the prologue starts, possibly
4207 by previous examination of symbol table information. */
4210 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4212 struct symtab_and_line sal
;
4213 CORE_ADDR func_addr
, func_end
;
4215 /* We have several sources of information we can consult to figure
4217 - Compilers usually emit line number info that marks the prologue
4218 as its own "source line". So the ending address of that "line"
4219 is the end of the prologue. If available, this is the most
4221 - The minimal symbols and partial symbols, which can usually tell
4222 us the starting and ending addresses of a function.
4223 - If we know the function's start address, we can call the
4224 architecture-defined gdbarch_skip_prologue function to analyze the
4225 instruction stream and guess where the prologue ends.
4226 - Our `func_start' argument; if non-zero, this is the caller's
4227 best guess as to the function's entry point. At the time of
4228 this writing, handle_inferior_event doesn't get this right, so
4229 it should be our last resort. */
4231 /* Consult the partial symbol table, to find which function
4233 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4235 CORE_ADDR prologue_end
;
4237 /* We don't even have minsym information, so fall back to using
4238 func_start, if given. */
4240 return 1; /* We *might* be in a prologue. */
4242 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4244 return func_start
<= pc
&& pc
< prologue_end
;
4247 /* If we have line number information for the function, that's
4248 usually pretty reliable. */
4249 sal
= find_pc_line (func_addr
, 0);
4251 /* Now sal describes the source line at the function's entry point,
4252 which (by convention) is the prologue. The end of that "line",
4253 sal.end, is the end of the prologue.
4255 Note that, for functions whose source code is all on a single
4256 line, the line number information doesn't always end up this way.
4257 So we must verify that our purported end-of-prologue address is
4258 *within* the function, not at its start or end. */
4260 || sal
.end
<= func_addr
4261 || func_end
<= sal
.end
)
4263 /* We don't have any good line number info, so use the minsym
4264 information, together with the architecture-specific prologue
4266 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4268 return func_addr
<= pc
&& pc
< prologue_end
;
4271 /* We have line number info, and it looks good. */
4272 return func_addr
<= pc
&& pc
< sal
.end
;
4275 /* Given PC at the function's start address, attempt to find the
4276 prologue end using SAL information. Return zero if the skip fails.
4278 A non-optimized prologue traditionally has one SAL for the function
4279 and a second for the function body. A single line function has
4280 them both pointing at the same line.
4282 An optimized prologue is similar but the prologue may contain
4283 instructions (SALs) from the instruction body. Need to skip those
4284 while not getting into the function body.
4286 The functions end point and an increasing SAL line are used as
4287 indicators of the prologue's endpoint.
4289 This code is based on the function refine_prologue_limit (versions
4290 found in both ia64 and ppc). */
4293 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4295 struct symtab_and_line prologue_sal
;
4300 /* Get an initial range for the function. */
4301 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4302 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4304 prologue_sal
= find_pc_line (start_pc
, 0);
4305 if (prologue_sal
.line
!= 0)
4307 /* For langauges other than assembly, treat two consecutive line
4308 entries at the same address as a zero-instruction prologue.
4309 The GNU assembler emits separate line notes for each instruction
4310 in a multi-instruction macro, but compilers generally will not
4312 if (prologue_sal
.symtab
->language
!= language_asm
)
4314 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4317 /* Skip any earlier lines, and any end-of-sequence marker
4318 from a previous function. */
4319 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4320 || linetable
->item
[idx
].line
== 0)
4323 if (idx
+1 < linetable
->nitems
4324 && linetable
->item
[idx
+1].line
!= 0
4325 && linetable
->item
[idx
+1].pc
== start_pc
)
4329 /* If there is only one sal that covers the entire function,
4330 then it is probably a single line function, like
4332 if (prologue_sal
.end
>= end_pc
)
4335 while (prologue_sal
.end
< end_pc
)
4337 struct symtab_and_line sal
;
4339 sal
= find_pc_line (prologue_sal
.end
, 0);
4342 /* Assume that a consecutive SAL for the same (or larger)
4343 line mark the prologue -> body transition. */
4344 if (sal
.line
>= prologue_sal
.line
)
4347 /* The line number is smaller. Check that it's from the
4348 same function, not something inlined. If it's inlined,
4349 then there is no point comparing the line numbers. */
4350 bl
= block_for_pc (prologue_sal
.end
);
4353 if (block_inlined_p (bl
))
4355 if (BLOCK_FUNCTION (bl
))
4360 bl
= BLOCK_SUPERBLOCK (bl
);
4365 /* The case in which compiler's optimizer/scheduler has
4366 moved instructions into the prologue. We look ahead in
4367 the function looking for address ranges whose
4368 corresponding line number is less the first one that we
4369 found for the function. This is more conservative then
4370 refine_prologue_limit which scans a large number of SALs
4371 looking for any in the prologue. */
4376 if (prologue_sal
.end
< end_pc
)
4377 /* Return the end of this line, or zero if we could not find a
4379 return prologue_sal
.end
;
4381 /* Don't return END_PC, which is past the end of the function. */
4382 return prologue_sal
.pc
;
4385 struct symtabs_and_lines
4386 decode_line_spec (char *string
, int funfirstline
)
4388 struct symtabs_and_lines sals
;
4389 struct symtab_and_line cursal
;
4392 error (_("Empty line specification."));
4394 /* We use whatever is set as the current source line. We do not try
4395 and get a default or it will recursively call us! */
4396 cursal
= get_current_source_symtab_and_line ();
4398 sals
= decode_line_1 (&string
, funfirstline
,
4399 cursal
.symtab
, cursal
.line
,
4400 (char ***) NULL
, NULL
);
4403 error (_("Junk at end of line specification: %s"), string
);
4408 static char *name_of_main
;
4409 enum language language_of_main
= language_unknown
;
4412 set_main_name (const char *name
)
4414 if (name_of_main
!= NULL
)
4416 xfree (name_of_main
);
4417 name_of_main
= NULL
;
4418 language_of_main
= language_unknown
;
4422 name_of_main
= xstrdup (name
);
4423 language_of_main
= language_unknown
;
4427 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4431 find_main_name (void)
4433 const char *new_main_name
;
4435 /* Try to see if the main procedure is in Ada. */
4436 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4437 be to add a new method in the language vector, and call this
4438 method for each language until one of them returns a non-empty
4439 name. This would allow us to remove this hard-coded call to
4440 an Ada function. It is not clear that this is a better approach
4441 at this point, because all methods need to be written in a way
4442 such that false positives never be returned. For instance, it is
4443 important that a method does not return a wrong name for the main
4444 procedure if the main procedure is actually written in a different
4445 language. It is easy to guaranty this with Ada, since we use a
4446 special symbol generated only when the main in Ada to find the name
4447 of the main procedure. It is difficult however to see how this can
4448 be guarantied for languages such as C, for instance. This suggests
4449 that order of call for these methods becomes important, which means
4450 a more complicated approach. */
4451 new_main_name
= ada_main_name ();
4452 if (new_main_name
!= NULL
)
4454 set_main_name (new_main_name
);
4458 new_main_name
= pascal_main_name ();
4459 if (new_main_name
!= NULL
)
4461 set_main_name (new_main_name
);
4465 /* The languages above didn't identify the name of the main procedure.
4466 Fallback to "main". */
4467 set_main_name ("main");
4473 if (name_of_main
== NULL
)
4476 return name_of_main
;
4479 /* Handle ``executable_changed'' events for the symtab module. */
4482 symtab_observer_executable_changed (void)
4484 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4485 set_main_name (NULL
);
4488 /* Helper to expand_line_sal below. Appends new sal to SAL,
4489 initializing it from SYMTAB, LINENO and PC. */
4491 append_expanded_sal (struct symtabs_and_lines
*sal
,
4492 struct program_space
*pspace
,
4493 struct symtab
*symtab
,
4494 int lineno
, CORE_ADDR pc
)
4496 sal
->sals
= xrealloc (sal
->sals
,
4497 sizeof (sal
->sals
[0])
4498 * (sal
->nelts
+ 1));
4499 init_sal (sal
->sals
+ sal
->nelts
);
4500 sal
->sals
[sal
->nelts
].pspace
= pspace
;
4501 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4502 sal
->sals
[sal
->nelts
].section
= NULL
;
4503 sal
->sals
[sal
->nelts
].end
= 0;
4504 sal
->sals
[sal
->nelts
].line
= lineno
;
4505 sal
->sals
[sal
->nelts
].pc
= pc
;
4509 /* Helper to expand_line_sal below. Search in the symtabs for any
4510 linetable entry that exactly matches FULLNAME and LINENO and append
4511 them to RET. If FULLNAME is NULL or if a symtab has no full name,
4512 use FILENAME and LINENO instead. If there is at least one match,
4513 return 1; otherwise, return 0, and return the best choice in BEST_ITEM
4517 append_exact_match_to_sals (char *filename
, char *fullname
, int lineno
,
4518 struct symtabs_and_lines
*ret
,
4519 struct linetable_entry
**best_item
,
4520 struct symtab
**best_symtab
)
4522 struct program_space
*pspace
;
4523 struct objfile
*objfile
;
4524 struct symtab
*symtab
;
4530 ALL_PSPACES (pspace
)
4531 ALL_PSPACE_SYMTABS (pspace
, objfile
, symtab
)
4533 if (FILENAME_CMP (filename
, symtab
->filename
) == 0)
4535 struct linetable
*l
;
4538 if (fullname
!= NULL
4539 && symtab_to_fullname (symtab
) != NULL
4540 && FILENAME_CMP (fullname
, symtab
->fullname
) != 0)
4542 l
= LINETABLE (symtab
);
4547 for (j
= 0; j
< len
; j
++)
4549 struct linetable_entry
*item
= &(l
->item
[j
]);
4551 if (item
->line
== lineno
)
4554 append_expanded_sal (ret
, objfile
->pspace
,
4555 symtab
, lineno
, item
->pc
);
4557 else if (!exact
&& item
->line
> lineno
4558 && (*best_item
== NULL
4559 || item
->line
< (*best_item
)->line
))
4562 *best_symtab
= symtab
;
4570 /* Compute a set of all sals in all program spaces that correspond to
4571 same file and line as SAL and return those. If there are several
4572 sals that belong to the same block, only one sal for the block is
4573 included in results. */
4575 struct symtabs_and_lines
4576 expand_line_sal (struct symtab_and_line sal
)
4578 struct symtabs_and_lines ret
;
4580 struct objfile
*objfile
;
4583 struct block
**blocks
= NULL
;
4585 struct cleanup
*old_chain
;
4590 /* Only expand sals that represent file.c:line. */
4591 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4593 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4600 struct program_space
*pspace
;
4601 struct linetable_entry
*best_item
= 0;
4602 struct symtab
*best_symtab
= 0;
4604 char *match_filename
;
4607 match_filename
= sal
.symtab
->filename
;
4609 /* We need to find all symtabs for a file which name
4610 is described by sal. We cannot just directly
4611 iterate over symtabs, since a symtab might not be
4612 yet created. We also cannot iterate over psymtabs,
4613 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4614 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4615 corresponding to an included file. Therefore, we do
4616 first pass over psymtabs, reading in those with
4617 the right name. Then, we iterate over symtabs, knowing
4618 that all symtabs we're interested in are loaded. */
4620 old_chain
= save_current_program_space ();
4621 ALL_PSPACES (pspace
)
4623 set_current_program_space (pspace
);
4624 ALL_PSPACE_OBJFILES (pspace
, objfile
)
4627 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
4628 sal
.symtab
->filename
);
4631 do_cleanups (old_chain
);
4633 /* Now search the symtab for exact matches and append them. If
4634 none is found, append the best_item and all its exact
4636 symtab_to_fullname (sal
.symtab
);
4637 exact
= append_exact_match_to_sals (sal
.symtab
->filename
,
4638 sal
.symtab
->fullname
, lineno
,
4639 &ret
, &best_item
, &best_symtab
);
4640 if (!exact
&& best_item
)
4641 append_exact_match_to_sals (best_symtab
->filename
,
4642 best_symtab
->fullname
, best_item
->line
,
4643 &ret
, &best_item
, &best_symtab
);
4646 /* For optimized code, compiler can scatter one source line accross
4647 disjoint ranges of PC values, even when no duplicate functions
4648 or inline functions are involved. For example, 'for (;;)' inside
4649 non-template non-inline non-ctor-or-dtor function can result
4650 in two PC ranges. In this case, we don't want to set breakpoint
4651 on first PC of each range. To filter such cases, we use containing
4652 blocks -- for each PC found above we see if there are other PCs
4653 that are in the same block. If yes, the other PCs are filtered out. */
4655 old_chain
= save_current_program_space ();
4656 filter
= alloca (ret
.nelts
* sizeof (int));
4657 blocks
= alloca (ret
.nelts
* sizeof (struct block
*));
4658 for (i
= 0; i
< ret
.nelts
; ++i
)
4660 set_current_program_space (ret
.sals
[i
].pspace
);
4663 blocks
[i
] = block_for_pc_sect (ret
.sals
[i
].pc
, ret
.sals
[i
].section
);
4666 do_cleanups (old_chain
);
4668 for (i
= 0; i
< ret
.nelts
; ++i
)
4669 if (blocks
[i
] != NULL
)
4670 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4671 if (blocks
[j
] == blocks
[i
])
4679 struct symtab_and_line
*final
=
4680 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4682 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4684 final
[j
++] = ret
.sals
[i
];
4686 ret
.nelts
-= deleted
;
4694 /* Return 1 if the supplied producer string matches the ARM RealView
4695 compiler (armcc). */
4698 producer_is_realview (const char *producer
)
4700 static const char *const arm_idents
[] = {
4701 "ARM C Compiler, ADS",
4702 "Thumb C Compiler, ADS",
4703 "ARM C++ Compiler, ADS",
4704 "Thumb C++ Compiler, ADS",
4705 "ARM/Thumb C/C++ Compiler, RVCT",
4706 "ARM C/C++ Compiler, RVCT"
4710 if (producer
== NULL
)
4713 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4714 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4721 _initialize_symtab (void)
4723 add_info ("variables", variables_info
, _("\
4724 All global and static variable names, or those matching REGEXP."));
4726 add_com ("whereis", class_info
, variables_info
, _("\
4727 All global and static variable names, or those matching REGEXP."));
4729 add_info ("functions", functions_info
,
4730 _("All function names, or those matching REGEXP."));
4732 /* FIXME: This command has at least the following problems:
4733 1. It prints builtin types (in a very strange and confusing fashion).
4734 2. It doesn't print right, e.g. with
4735 typedef struct foo *FOO
4736 type_print prints "FOO" when we want to make it (in this situation)
4737 print "struct foo *".
4738 I also think "ptype" or "whatis" is more likely to be useful (but if
4739 there is much disagreement "info types" can be fixed). */
4740 add_info ("types", types_info
,
4741 _("All type names, or those matching REGEXP."));
4743 add_info ("sources", sources_info
,
4744 _("Source files in the program."));
4746 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4747 _("Set a breakpoint for all functions matching REGEXP."));
4751 add_com ("lf", class_info
, sources_info
,
4752 _("Source files in the program"));
4753 add_com ("lg", class_info
, variables_info
, _("\
4754 All global and static variable names, or those matching REGEXP."));
4757 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4758 multiple_symbols_modes
, &multiple_symbols_mode
,
4760 Set the debugger behavior when more than one symbol are possible matches\n\
4761 in an expression."), _("\
4762 Show how the debugger handles ambiguities in expressions."), _("\
4763 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4764 NULL
, NULL
, &setlist
, &showlist
);
4766 observer_attach_executable_changed (symtab_observer_executable_changed
);