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_msymbol_info (struct minimal_symbol
*);
115 void _initialize_symtab (void);
119 /* Allow the user to configure the debugger behavior with respect
120 to multiple-choice menus when more than one symbol matches during
123 const char multiple_symbols_ask
[] = "ask";
124 const char multiple_symbols_all
[] = "all";
125 const char multiple_symbols_cancel
[] = "cancel";
126 static const char *multiple_symbols_modes
[] =
128 multiple_symbols_ask
,
129 multiple_symbols_all
,
130 multiple_symbols_cancel
,
133 static const char *multiple_symbols_mode
= multiple_symbols_all
;
135 /* Read-only accessor to AUTO_SELECT_MODE. */
138 multiple_symbols_select_mode (void)
140 return multiple_symbols_mode
;
143 /* Block in which the most recently searched-for symbol was found.
144 Might be better to make this a parameter to lookup_symbol and
147 const struct block
*block_found
;
149 /* Check for a symtab of a specific name; first in symtabs, then in
150 psymtabs. *If* there is no '/' in the name, a match after a '/'
151 in the symtab filename will also work. */
154 lookup_symtab (const char *name
)
157 struct symtab
*s
= NULL
;
158 struct objfile
*objfile
;
159 char *real_path
= NULL
;
160 char *full_path
= NULL
;
162 /* Here we are interested in canonicalizing an absolute path, not
163 absolutizing a relative path. */
164 if (IS_ABSOLUTE_PATH (name
))
166 full_path
= xfullpath (name
);
167 make_cleanup (xfree
, full_path
);
168 real_path
= gdb_realpath (name
);
169 make_cleanup (xfree
, real_path
);
174 /* First, search for an exact match. */
176 ALL_SYMTABS (objfile
, s
)
178 if (FILENAME_CMP (name
, s
->filename
) == 0)
183 /* If the user gave us an absolute path, try to find the file in
184 this symtab and use its absolute path. */
186 if (full_path
!= NULL
)
188 const char *fp
= symtab_to_fullname (s
);
190 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
196 if (real_path
!= NULL
)
198 char *fullname
= symtab_to_fullname (s
);
200 if (fullname
!= NULL
)
202 char *rp
= gdb_realpath (fullname
);
204 make_cleanup (xfree
, rp
);
205 if (FILENAME_CMP (real_path
, rp
) == 0)
213 /* Now, search for a matching tail (only if name doesn't have any dirs). */
215 if (lbasename (name
) == name
)
216 ALL_SYMTABS (objfile
, s
)
218 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
222 /* Same search rules as above apply here, but now we look thru the
226 ALL_OBJFILES (objfile
)
229 && objfile
->sf
->qf
->lookup_symtab (objfile
, name
, full_path
, real_path
,
242 /* At this point, we have located the psymtab for this file, but
243 the conversion to a symtab has failed. This usually happens
244 when we are looking up an include file. In this case,
245 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
246 been created. So, we need to run through the symtabs again in
247 order to find the file.
248 XXX - This is a crock, and should be fixed inside of the
249 symbol parsing routines. */
253 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
254 full method name, which consist of the class name (from T), the unadorned
255 method name from METHOD_ID, and the signature for the specific overload,
256 specified by SIGNATURE_ID. Note that this function is g++ specific. */
259 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
261 int mangled_name_len
;
263 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
264 struct fn_field
*method
= &f
[signature_id
];
265 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
266 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
267 char *newname
= type_name_no_tag (type
);
269 /* Does the form of physname indicate that it is the full mangled name
270 of a constructor (not just the args)? */
271 int is_full_physname_constructor
;
274 int is_destructor
= is_destructor_name (physname
);
275 /* Need a new type prefix. */
276 char *const_prefix
= method
->is_const
? "C" : "";
277 char *volatile_prefix
= method
->is_volatile
? "V" : "";
279 int len
= (newname
== NULL
? 0 : strlen (newname
));
281 /* Nothing to do if physname already contains a fully mangled v3 abi name
282 or an operator name. */
283 if ((physname
[0] == '_' && physname
[1] == 'Z')
284 || is_operator_name (field_name
))
285 return xstrdup (physname
);
287 is_full_physname_constructor
= is_constructor_name (physname
);
289 is_constructor
= is_full_physname_constructor
290 || (newname
&& strcmp (field_name
, newname
) == 0);
293 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
295 if (is_destructor
|| is_full_physname_constructor
)
297 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
298 strcpy (mangled_name
, physname
);
304 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
306 else if (physname
[0] == 't' || physname
[0] == 'Q')
308 /* The physname for template and qualified methods already includes
310 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
316 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
318 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
319 + strlen (buf
) + len
+ strlen (physname
) + 1);
321 mangled_name
= (char *) xmalloc (mangled_name_len
);
323 mangled_name
[0] = '\0';
325 strcpy (mangled_name
, field_name
);
327 strcat (mangled_name
, buf
);
328 /* If the class doesn't have a name, i.e. newname NULL, then we just
329 mangle it using 0 for the length of the class. Thus it gets mangled
330 as something starting with `::' rather than `classname::'. */
332 strcat (mangled_name
, newname
);
334 strcat (mangled_name
, physname
);
335 return (mangled_name
);
338 /* Initialize the cplus_specific structure. 'cplus_specific' should
339 only be allocated for use with cplus symbols. */
342 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
343 struct objfile
*objfile
)
345 /* A language_specific structure should not have been previously
347 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
348 gdb_assert (objfile
!= NULL
);
350 gsymbol
->language_specific
.cplus_specific
=
351 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
354 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
355 correctly allocated. For C++ symbols a cplus_specific struct is
356 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
357 OBJFILE can be NULL. */
359 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
361 struct objfile
*objfile
)
363 if (gsymbol
->language
== language_cplus
)
365 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
366 symbol_init_cplus_specific (gsymbol
, objfile
);
368 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
371 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
374 /* Return the demangled name of GSYMBOL. */
376 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
378 if (gsymbol
->language
== language_cplus
)
380 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
381 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
386 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
390 /* Initialize the language dependent portion of a symbol
391 depending upon the language for the symbol. */
393 symbol_set_language (struct general_symbol_info
*gsymbol
,
394 enum language language
)
396 gsymbol
->language
= language
;
397 if (gsymbol
->language
== language_d
398 || gsymbol
->language
== language_java
399 || gsymbol
->language
== language_objc
400 || gsymbol
->language
== language_fortran
)
402 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
404 else if (gsymbol
->language
== language_cplus
)
405 gsymbol
->language_specific
.cplus_specific
= NULL
;
408 memset (&gsymbol
->language_specific
, 0,
409 sizeof (gsymbol
->language_specific
));
413 /* Functions to initialize a symbol's mangled name. */
415 /* Objects of this type are stored in the demangled name hash table. */
416 struct demangled_name_entry
422 /* Hash function for the demangled name hash. */
424 hash_demangled_name_entry (const void *data
)
426 const struct demangled_name_entry
*e
= data
;
428 return htab_hash_string (e
->mangled
);
431 /* Equality function for the demangled name hash. */
433 eq_demangled_name_entry (const void *a
, const void *b
)
435 const struct demangled_name_entry
*da
= a
;
436 const struct demangled_name_entry
*db
= b
;
438 return strcmp (da
->mangled
, db
->mangled
) == 0;
441 /* Create the hash table used for demangled names. Each hash entry is
442 a pair of strings; one for the mangled name and one for the demangled
443 name. The entry is hashed via just the mangled name. */
446 create_demangled_names_hash (struct objfile
*objfile
)
448 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
449 The hash table code will round this up to the next prime number.
450 Choosing a much larger table size wastes memory, and saves only about
451 1% in symbol reading. */
453 objfile
->demangled_names_hash
= htab_create_alloc
454 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
455 NULL
, xcalloc
, xfree
);
458 /* Try to determine the demangled name for a symbol, based on the
459 language of that symbol. If the language is set to language_auto,
460 it will attempt to find any demangling algorithm that works and
461 then set the language appropriately. The returned name is allocated
462 by the demangler and should be xfree'd. */
465 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
468 char *demangled
= NULL
;
470 if (gsymbol
->language
== language_unknown
)
471 gsymbol
->language
= language_auto
;
473 if (gsymbol
->language
== language_objc
474 || gsymbol
->language
== language_auto
)
477 objc_demangle (mangled
, 0);
478 if (demangled
!= NULL
)
480 gsymbol
->language
= language_objc
;
484 if (gsymbol
->language
== language_cplus
485 || gsymbol
->language
== language_auto
)
488 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
| DMGL_VERBOSE
);
489 if (demangled
!= NULL
)
491 gsymbol
->language
= language_cplus
;
495 if (gsymbol
->language
== language_java
)
498 cplus_demangle (mangled
,
499 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
500 if (demangled
!= NULL
)
502 gsymbol
->language
= language_java
;
506 if (gsymbol
->language
== language_d
507 || gsymbol
->language
== language_auto
)
509 demangled
= d_demangle(mangled
, 0);
510 if (demangled
!= NULL
)
512 gsymbol
->language
= language_d
;
516 /* We could support `gsymbol->language == language_fortran' here to provide
517 module namespaces also for inferiors with only minimal symbol table (ELF
518 symbols). Just the mangling standard is not standardized across compilers
519 and there is no DW_AT_producer available for inferiors with only the ELF
520 symbols to check the mangling kind. */
524 /* Set both the mangled and demangled (if any) names for GSYMBOL based
525 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
526 objfile's obstack; but if COPY_NAME is 0 and if NAME is
527 NUL-terminated, then this function assumes that NAME is already
528 correctly saved (either permanently or with a lifetime tied to the
529 objfile), and it will not be copied.
531 The hash table corresponding to OBJFILE is used, and the memory
532 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
533 so the pointer can be discarded after calling this function. */
535 /* We have to be careful when dealing with Java names: when we run
536 into a Java minimal symbol, we don't know it's a Java symbol, so it
537 gets demangled as a C++ name. This is unfortunate, but there's not
538 much we can do about it: but when demangling partial symbols and
539 regular symbols, we'd better not reuse the wrong demangled name.
540 (See PR gdb/1039.) We solve this by putting a distinctive prefix
541 on Java names when storing them in the hash table. */
543 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
544 don't mind the Java prefix so much: different languages have
545 different demangling requirements, so it's only natural that we
546 need to keep language data around in our demangling cache. But
547 it's not good that the minimal symbol has the wrong demangled name.
548 Unfortunately, I can't think of any easy solution to that
551 #define JAVA_PREFIX "##JAVA$$"
552 #define JAVA_PREFIX_LEN 8
555 symbol_set_names (struct general_symbol_info
*gsymbol
,
556 const char *linkage_name
, int len
, int copy_name
,
557 struct objfile
*objfile
)
559 struct demangled_name_entry
**slot
;
560 /* A 0-terminated copy of the linkage name. */
561 const char *linkage_name_copy
;
562 /* A copy of the linkage name that might have a special Java prefix
563 added to it, for use when looking names up in the hash table. */
564 const char *lookup_name
;
565 /* The length of lookup_name. */
567 struct demangled_name_entry entry
;
569 if (gsymbol
->language
== language_ada
)
571 /* In Ada, we do the symbol lookups using the mangled name, so
572 we can save some space by not storing the demangled name.
574 As a side note, we have also observed some overlap between
575 the C++ mangling and Ada mangling, similarly to what has
576 been observed with Java. Because we don't store the demangled
577 name with the symbol, we don't need to use the same trick
580 gsymbol
->name
= (char *) linkage_name
;
583 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
584 memcpy (gsymbol
->name
, linkage_name
, len
);
585 gsymbol
->name
[len
] = '\0';
587 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
592 if (objfile
->demangled_names_hash
== NULL
)
593 create_demangled_names_hash (objfile
);
595 /* The stabs reader generally provides names that are not
596 NUL-terminated; most of the other readers don't do this, so we
597 can just use the given copy, unless we're in the Java case. */
598 if (gsymbol
->language
== language_java
)
602 lookup_len
= len
+ JAVA_PREFIX_LEN
;
603 alloc_name
= alloca (lookup_len
+ 1);
604 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
605 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
606 alloc_name
[lookup_len
] = '\0';
608 lookup_name
= alloc_name
;
609 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
611 else if (linkage_name
[len
] != '\0')
616 alloc_name
= alloca (lookup_len
+ 1);
617 memcpy (alloc_name
, linkage_name
, len
);
618 alloc_name
[lookup_len
] = '\0';
620 lookup_name
= alloc_name
;
621 linkage_name_copy
= alloc_name
;
626 lookup_name
= linkage_name
;
627 linkage_name_copy
= linkage_name
;
630 entry
.mangled
= (char *) lookup_name
;
631 slot
= ((struct demangled_name_entry
**)
632 htab_find_slot (objfile
->demangled_names_hash
,
635 /* If this name is not in the hash table, add it. */
638 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
640 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
642 /* Suppose we have demangled_name==NULL, copy_name==0, and
643 lookup_name==linkage_name. In this case, we already have the
644 mangled name saved, and we don't have a demangled name. So,
645 you might think we could save a little space by not recording
646 this in the hash table at all.
648 It turns out that it is actually important to still save such
649 an entry in the hash table, because storing this name gives
650 us better bcache hit rates for partial symbols. */
651 if (!copy_name
&& lookup_name
== linkage_name
)
653 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
654 offsetof (struct demangled_name_entry
,
656 + demangled_len
+ 1);
657 (*slot
)->mangled
= (char *) lookup_name
;
661 /* If we must copy the mangled name, put it directly after
662 the demangled name so we can have a single
664 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
665 offsetof (struct demangled_name_entry
,
667 + lookup_len
+ demangled_len
+ 2);
668 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
669 strcpy ((*slot
)->mangled
, lookup_name
);
672 if (demangled_name
!= NULL
)
674 strcpy ((*slot
)->demangled
, demangled_name
);
675 xfree (demangled_name
);
678 (*slot
)->demangled
[0] = '\0';
681 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
682 if ((*slot
)->demangled
[0] != '\0')
683 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
685 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
688 /* Return the source code name of a symbol. In languages where
689 demangling is necessary, this is the demangled name. */
692 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
694 switch (gsymbol
->language
)
700 case language_fortran
:
701 if (symbol_get_demangled_name (gsymbol
) != NULL
)
702 return symbol_get_demangled_name (gsymbol
);
705 if (symbol_get_demangled_name (gsymbol
) != NULL
)
706 return symbol_get_demangled_name (gsymbol
);
708 return ada_decode_symbol (gsymbol
);
713 return gsymbol
->name
;
716 /* Return the demangled name for a symbol based on the language for
717 that symbol. If no demangled name exists, return NULL. */
719 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
721 switch (gsymbol
->language
)
727 case language_fortran
:
728 if (symbol_get_demangled_name (gsymbol
) != NULL
)
729 return symbol_get_demangled_name (gsymbol
);
732 if (symbol_get_demangled_name (gsymbol
) != NULL
)
733 return symbol_get_demangled_name (gsymbol
);
735 return ada_decode_symbol (gsymbol
);
743 /* Return the search name of a symbol---generally the demangled or
744 linkage name of the symbol, depending on how it will be searched for.
745 If there is no distinct demangled name, then returns the same value
746 (same pointer) as SYMBOL_LINKAGE_NAME. */
748 symbol_search_name (const struct general_symbol_info
*gsymbol
)
750 if (gsymbol
->language
== language_ada
)
751 return gsymbol
->name
;
753 return symbol_natural_name (gsymbol
);
756 /* Initialize the structure fields to zero values. */
758 init_sal (struct symtab_and_line
*sal
)
766 sal
->explicit_pc
= 0;
767 sal
->explicit_line
= 0;
771 /* Return 1 if the two sections are the same, or if they could
772 plausibly be copies of each other, one in an original object
773 file and another in a separated debug file. */
776 matching_obj_sections (struct obj_section
*obj_first
,
777 struct obj_section
*obj_second
)
779 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
780 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
783 /* If they're the same section, then they match. */
787 /* If either is NULL, give up. */
788 if (first
== NULL
|| second
== NULL
)
791 /* This doesn't apply to absolute symbols. */
792 if (first
->owner
== NULL
|| second
->owner
== NULL
)
795 /* If they're in the same object file, they must be different sections. */
796 if (first
->owner
== second
->owner
)
799 /* Check whether the two sections are potentially corresponding. They must
800 have the same size, address, and name. We can't compare section indexes,
801 which would be more reliable, because some sections may have been
803 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
806 /* In-memory addresses may start at a different offset, relativize them. */
807 if (bfd_get_section_vma (first
->owner
, first
)
808 - bfd_get_start_address (first
->owner
)
809 != bfd_get_section_vma (second
->owner
, second
)
810 - bfd_get_start_address (second
->owner
))
813 if (bfd_get_section_name (first
->owner
, first
) == NULL
814 || bfd_get_section_name (second
->owner
, second
) == NULL
815 || strcmp (bfd_get_section_name (first
->owner
, first
),
816 bfd_get_section_name (second
->owner
, second
)) != 0)
819 /* Otherwise check that they are in corresponding objfiles. */
822 if (obj
->obfd
== first
->owner
)
824 gdb_assert (obj
!= NULL
);
826 if (obj
->separate_debug_objfile
!= NULL
827 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
829 if (obj
->separate_debug_objfile_backlink
!= NULL
830 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
837 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
839 struct objfile
*objfile
;
840 struct minimal_symbol
*msymbol
;
842 /* If we know that this is not a text address, return failure. This is
843 necessary because we loop based on texthigh and textlow, which do
844 not include the data ranges. */
845 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
847 && (MSYMBOL_TYPE (msymbol
) == mst_data
848 || MSYMBOL_TYPE (msymbol
) == mst_bss
849 || MSYMBOL_TYPE (msymbol
) == mst_abs
850 || MSYMBOL_TYPE (msymbol
) == mst_file_data
851 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
854 ALL_OBJFILES (objfile
)
856 struct symtab
*result
= NULL
;
859 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
868 /* Debug symbols usually don't have section information. We need to dig that
869 out of the minimal symbols and stash that in the debug symbol. */
872 fixup_section (struct general_symbol_info
*ginfo
,
873 CORE_ADDR addr
, struct objfile
*objfile
)
875 struct minimal_symbol
*msym
;
877 /* First, check whether a minimal symbol with the same name exists
878 and points to the same address. The address check is required
879 e.g. on PowerPC64, where the minimal symbol for a function will
880 point to the function descriptor, while the debug symbol will
881 point to the actual function code. */
882 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
885 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
886 ginfo
->section
= SYMBOL_SECTION (msym
);
890 /* Static, function-local variables do appear in the linker
891 (minimal) symbols, but are frequently given names that won't
892 be found via lookup_minimal_symbol(). E.g., it has been
893 observed in frv-uclinux (ELF) executables that a static,
894 function-local variable named "foo" might appear in the
895 linker symbols as "foo.6" or "foo.3". Thus, there is no
896 point in attempting to extend the lookup-by-name mechanism to
897 handle this case due to the fact that there can be multiple
900 So, instead, search the section table when lookup by name has
901 failed. The ``addr'' and ``endaddr'' fields may have already
902 been relocated. If so, the relocation offset (i.e. the
903 ANOFFSET value) needs to be subtracted from these values when
904 performing the comparison. We unconditionally subtract it,
905 because, when no relocation has been performed, the ANOFFSET
906 value will simply be zero.
908 The address of the symbol whose section we're fixing up HAS
909 NOT BEEN adjusted (relocated) yet. It can't have been since
910 the section isn't yet known and knowing the section is
911 necessary in order to add the correct relocation value. In
912 other words, we wouldn't even be in this function (attempting
913 to compute the section) if it were already known.
915 Note that it is possible to search the minimal symbols
916 (subtracting the relocation value if necessary) to find the
917 matching minimal symbol, but this is overkill and much less
918 efficient. It is not necessary to find the matching minimal
919 symbol, only its section.
921 Note that this technique (of doing a section table search)
922 can fail when unrelocated section addresses overlap. For
923 this reason, we still attempt a lookup by name prior to doing
924 a search of the section table. */
926 struct obj_section
*s
;
928 ALL_OBJFILE_OSECTIONS (objfile
, s
)
930 int idx
= s
->the_bfd_section
->index
;
931 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
933 if (obj_section_addr (s
) - offset
<= addr
934 && addr
< obj_section_endaddr (s
) - offset
)
936 ginfo
->obj_section
= s
;
937 ginfo
->section
= idx
;
945 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
952 if (SYMBOL_OBJ_SECTION (sym
))
955 /* We either have an OBJFILE, or we can get at it from the sym's
956 symtab. Anything else is a bug. */
957 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
960 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
962 /* We should have an objfile by now. */
963 gdb_assert (objfile
);
965 switch (SYMBOL_CLASS (sym
))
969 addr
= SYMBOL_VALUE_ADDRESS (sym
);
972 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
976 /* Nothing else will be listed in the minsyms -- no use looking
981 fixup_section (&sym
->ginfo
, addr
, objfile
);
986 /* Find the definition for a specified symbol name NAME
987 in domain DOMAIN, visible from lexical block BLOCK.
988 Returns the struct symbol pointer, or zero if no symbol is found.
989 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
990 NAME is a field of the current implied argument `this'. If so set
991 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
992 BLOCK_FOUND is set to the block in which NAME is found (in the case of
993 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
995 /* This function has a bunch of loops in it and it would seem to be
996 attractive to put in some QUIT's (though I'm not really sure
997 whether it can run long enough to be really important). But there
998 are a few calls for which it would appear to be bad news to quit
999 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1000 that there is C++ code below which can error(), but that probably
1001 doesn't affect these calls since they are looking for a known
1002 variable and thus can probably assume it will never hit the C++
1006 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1007 const domain_enum domain
, enum language lang
,
1008 int *is_a_field_of_this
)
1010 char *demangled_name
= NULL
;
1011 const char *modified_name
= NULL
;
1012 struct symbol
*returnval
;
1013 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1015 modified_name
= name
;
1017 /* If we are using C++, D, or Java, demangle the name before doing a
1018 lookup, so we can always binary search. */
1019 if (lang
== language_cplus
)
1021 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1024 modified_name
= demangled_name
;
1025 make_cleanup (xfree
, demangled_name
);
1029 /* If we were given a non-mangled name, canonicalize it
1030 according to the language (so far only for C++). */
1031 demangled_name
= cp_canonicalize_string (name
);
1034 modified_name
= demangled_name
;
1035 make_cleanup (xfree
, demangled_name
);
1039 else if (lang
== language_java
)
1041 demangled_name
= cplus_demangle (name
,
1042 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1045 modified_name
= demangled_name
;
1046 make_cleanup (xfree
, demangled_name
);
1049 else if (lang
== language_d
)
1051 demangled_name
= d_demangle (name
, 0);
1054 modified_name
= demangled_name
;
1055 make_cleanup (xfree
, demangled_name
);
1059 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1060 is_a_field_of_this
);
1061 do_cleanups (cleanup
);
1066 /* Behave like lookup_symbol_in_language, but performed with the
1067 current language. */
1070 lookup_symbol (const char *name
, const struct block
*block
,
1071 domain_enum domain
, int *is_a_field_of_this
)
1073 return lookup_symbol_in_language (name
, block
, domain
,
1074 current_language
->la_language
,
1075 is_a_field_of_this
);
1078 /* Behave like lookup_symbol except that NAME is the natural name
1079 of the symbol that we're looking for and, if LINKAGE_NAME is
1080 non-NULL, ensure that the symbol's linkage name matches as
1083 static struct symbol
*
1084 lookup_symbol_aux (const char *name
, const struct block
*block
,
1085 const domain_enum domain
, enum language language
,
1086 int *is_a_field_of_this
)
1089 const struct language_defn
*langdef
;
1091 /* Make sure we do something sensible with is_a_field_of_this, since
1092 the callers that set this parameter to some non-null value will
1093 certainly use it later and expect it to be either 0 or 1.
1094 If we don't set it, the contents of is_a_field_of_this are
1096 if (is_a_field_of_this
!= NULL
)
1097 *is_a_field_of_this
= 0;
1099 /* Search specified block and its superiors. Don't search
1100 STATIC_BLOCK or GLOBAL_BLOCK. */
1102 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1106 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1107 check to see if NAME is a field of `this'. */
1109 langdef
= language_def (language
);
1111 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1114 struct symbol
*sym
= NULL
;
1115 const struct block
*function_block
= block
;
1117 /* 'this' is only defined in the function's block, so find the
1118 enclosing function block. */
1119 for (; function_block
&& !BLOCK_FUNCTION (function_block
);
1120 function_block
= BLOCK_SUPERBLOCK (function_block
));
1122 if (function_block
&& !dict_empty (BLOCK_DICT (function_block
)))
1123 sym
= lookup_block_symbol (function_block
, langdef
->la_name_of_this
,
1127 struct type
*t
= sym
->type
;
1129 /* I'm not really sure that type of this can ever
1130 be typedefed; just be safe. */
1132 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1133 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1134 t
= TYPE_TARGET_TYPE (t
);
1136 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1137 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1138 error (_("Internal error: `%s' is not an aggregate"),
1139 langdef
->la_name_of_this
);
1141 if (check_field (t
, name
))
1143 *is_a_field_of_this
= 1;
1149 /* Now do whatever is appropriate for LANGUAGE to look
1150 up static and global variables. */
1152 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1156 /* Now search all static file-level symbols. Not strictly correct,
1157 but more useful than an error. */
1159 return lookup_static_symbol_aux (name
, domain
);
1162 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1163 first, then check the psymtabs. If a psymtab indicates the existence of the
1164 desired name as a file-level static, then do psymtab-to-symtab conversion on
1165 the fly and return the found symbol. */
1168 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1170 struct objfile
*objfile
;
1173 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1177 ALL_OBJFILES (objfile
)
1179 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1187 /* Check to see if the symbol is defined in BLOCK or its superiors.
1188 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1190 static struct symbol
*
1191 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1192 const domain_enum domain
,
1193 enum language language
)
1196 const struct block
*static_block
= block_static_block (block
);
1197 const char *scope
= block_scope (block
);
1199 /* Check if either no block is specified or it's a global block. */
1201 if (static_block
== NULL
)
1204 while (block
!= static_block
)
1206 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1210 if (language
== language_cplus
|| language
== language_fortran
)
1212 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1218 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1220 block
= BLOCK_SUPERBLOCK (block
);
1223 /* We've reached the edge of the function without finding a result. */
1228 /* Look up OBJFILE to BLOCK. */
1231 lookup_objfile_from_block (const struct block
*block
)
1233 struct objfile
*obj
;
1239 block
= block_global_block (block
);
1240 /* Go through SYMTABS. */
1241 ALL_SYMTABS (obj
, s
)
1242 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1244 if (obj
->separate_debug_objfile_backlink
)
1245 obj
= obj
->separate_debug_objfile_backlink
;
1253 /* Look up a symbol in a block; if found, fixup the symbol, and set
1254 block_found appropriately. */
1257 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1258 const domain_enum domain
)
1262 sym
= lookup_block_symbol (block
, name
, domain
);
1265 block_found
= block
;
1266 return fixup_symbol_section (sym
, NULL
);
1272 /* Check all global symbols in OBJFILE in symtabs and
1276 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1278 const domain_enum domain
)
1280 const struct objfile
*objfile
;
1282 struct blockvector
*bv
;
1283 const struct block
*block
;
1286 for (objfile
= main_objfile
;
1288 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1290 /* Go through symtabs. */
1291 ALL_OBJFILE_SYMTABS (objfile
, s
)
1293 bv
= BLOCKVECTOR (s
);
1294 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1295 sym
= lookup_block_symbol (block
, name
, domain
);
1298 block_found
= block
;
1299 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1303 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1312 /* Check to see if the symbol is defined in one of the symtabs.
1313 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1314 depending on whether or not we want to search global symbols or
1317 static struct symbol
*
1318 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1319 const domain_enum domain
)
1322 struct objfile
*objfile
;
1323 struct blockvector
*bv
;
1324 const struct block
*block
;
1327 ALL_OBJFILES (objfile
)
1330 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1334 ALL_OBJFILE_SYMTABS (objfile
, s
)
1337 bv
= BLOCKVECTOR (s
);
1338 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1339 sym
= lookup_block_symbol (block
, name
, domain
);
1342 block_found
= block
;
1343 return fixup_symbol_section (sym
, objfile
);
1351 /* A helper function for lookup_symbol_aux that interfaces with the
1352 "quick" symbol table functions. */
1354 static struct symbol
*
1355 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1356 const char *name
, const domain_enum domain
)
1358 struct symtab
*symtab
;
1359 struct blockvector
*bv
;
1360 const struct block
*block
;
1365 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1369 bv
= BLOCKVECTOR (symtab
);
1370 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1371 sym
= lookup_block_symbol (block
, name
, domain
);
1374 /* This shouldn't be necessary, but as a last resort try
1375 looking in the statics even though the psymtab claimed
1376 the symbol was global, or vice-versa. It's possible
1377 that the psymtab gets it wrong in some cases. */
1379 /* FIXME: carlton/2002-09-30: Should we really do that?
1380 If that happens, isn't it likely to be a GDB error, in
1381 which case we should fix the GDB error rather than
1382 silently dealing with it here? So I'd vote for
1383 removing the check for the symbol in the other
1385 block
= BLOCKVECTOR_BLOCK (bv
,
1386 kind
== GLOBAL_BLOCK
?
1387 STATIC_BLOCK
: GLOBAL_BLOCK
);
1388 sym
= lookup_block_symbol (block
, name
, domain
);
1391 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1392 %s may be an inlined function, or may be a template function\n\
1393 (if a template, try specifying an instantiation: %s<type>)."),
1394 kind
== GLOBAL_BLOCK
? "global" : "static",
1395 name
, symtab
->filename
, name
, name
);
1397 return fixup_symbol_section (sym
, objfile
);
1400 /* A default version of lookup_symbol_nonlocal for use by languages
1401 that can't think of anything better to do. This implements the C
1405 basic_lookup_symbol_nonlocal (const char *name
,
1406 const struct block
*block
,
1407 const domain_enum domain
)
1411 /* NOTE: carlton/2003-05-19: The comments below were written when
1412 this (or what turned into this) was part of lookup_symbol_aux;
1413 I'm much less worried about these questions now, since these
1414 decisions have turned out well, but I leave these comments here
1417 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1418 not it would be appropriate to search the current global block
1419 here as well. (That's what this code used to do before the
1420 is_a_field_of_this check was moved up.) On the one hand, it's
1421 redundant with the lookup_symbol_aux_symtabs search that happens
1422 next. On the other hand, if decode_line_1 is passed an argument
1423 like filename:var, then the user presumably wants 'var' to be
1424 searched for in filename. On the third hand, there shouldn't be
1425 multiple global variables all of which are named 'var', and it's
1426 not like decode_line_1 has ever restricted its search to only
1427 global variables in a single filename. All in all, only
1428 searching the static block here seems best: it's correct and it's
1431 /* NOTE: carlton/2002-12-05: There's also a possible performance
1432 issue here: if you usually search for global symbols in the
1433 current file, then it would be slightly better to search the
1434 current global block before searching all the symtabs. But there
1435 are other factors that have a much greater effect on performance
1436 than that one, so I don't think we should worry about that for
1439 sym
= lookup_symbol_static (name
, block
, domain
);
1443 return lookup_symbol_global (name
, block
, domain
);
1446 /* Lookup a symbol in the static block associated to BLOCK, if there
1447 is one; do nothing if BLOCK is NULL or a global block. */
1450 lookup_symbol_static (const char *name
,
1451 const struct block
*block
,
1452 const domain_enum domain
)
1454 const struct block
*static_block
= block_static_block (block
);
1456 if (static_block
!= NULL
)
1457 return lookup_symbol_aux_block (name
, static_block
, domain
);
1462 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1466 lookup_symbol_global (const char *name
,
1467 const struct block
*block
,
1468 const domain_enum domain
)
1470 struct symbol
*sym
= NULL
;
1471 struct objfile
*objfile
= NULL
;
1473 /* Call library-specific lookup procedure. */
1474 objfile
= lookup_objfile_from_block (block
);
1475 if (objfile
!= NULL
)
1476 sym
= solib_global_lookup (objfile
, name
, domain
);
1480 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, domain
);
1484 ALL_OBJFILES (objfile
)
1486 sym
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
, name
, domain
);
1495 symbol_matches_domain (enum language symbol_language
,
1496 domain_enum symbol_domain
,
1499 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1500 A Java class declaration also defines a typedef for the class.
1501 Similarly, any Ada type declaration implicitly defines a typedef. */
1502 if (symbol_language
== language_cplus
1503 || symbol_language
== language_d
1504 || symbol_language
== language_java
1505 || symbol_language
== language_ada
)
1507 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1508 && symbol_domain
== STRUCT_DOMAIN
)
1511 /* For all other languages, strict match is required. */
1512 return (symbol_domain
== domain
);
1515 /* Look up a type named NAME in the struct_domain. The type returned
1516 must not be opaque -- i.e., must have at least one field
1520 lookup_transparent_type (const char *name
)
1522 return current_language
->la_lookup_transparent_type (name
);
1525 /* A helper for basic_lookup_transparent_type that interfaces with the
1526 "quick" symbol table functions. */
1528 static struct type
*
1529 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1532 struct symtab
*symtab
;
1533 struct blockvector
*bv
;
1534 struct block
*block
;
1539 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1543 bv
= BLOCKVECTOR (symtab
);
1544 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1545 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1548 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1550 /* This shouldn't be necessary, but as a last resort
1551 * try looking in the 'other kind' even though the psymtab
1552 * claimed the symbol was one thing. It's possible that
1553 * the psymtab gets it wrong in some cases.
1555 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1556 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1558 /* FIXME; error is wrong in one case. */
1560 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1561 %s may be an inlined function, or may be a template function\n\
1562 (if a template, try specifying an instantiation: %s<type>)."),
1563 name
, symtab
->filename
, name
, name
);
1565 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1566 return SYMBOL_TYPE (sym
);
1571 /* The standard implementation of lookup_transparent_type. This code
1572 was modeled on lookup_symbol -- the parts not relevant to looking
1573 up types were just left out. In particular it's assumed here that
1574 types are available in struct_domain and only at file-static or
1578 basic_lookup_transparent_type (const char *name
)
1581 struct symtab
*s
= NULL
;
1582 struct blockvector
*bv
;
1583 struct objfile
*objfile
;
1584 struct block
*block
;
1587 /* Now search all the global symbols. Do the symtab's first, then
1588 check the psymtab's. If a psymtab indicates the existence
1589 of the desired name as a global, then do psymtab-to-symtab
1590 conversion on the fly and return the found symbol. */
1592 ALL_OBJFILES (objfile
)
1595 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1597 name
, STRUCT_DOMAIN
);
1599 ALL_OBJFILE_SYMTABS (objfile
, s
)
1602 bv
= BLOCKVECTOR (s
);
1603 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1604 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1605 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1607 return SYMBOL_TYPE (sym
);
1612 ALL_OBJFILES (objfile
)
1614 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1619 /* Now search the static file-level symbols.
1620 Not strictly correct, but more useful than an error.
1621 Do the symtab's first, then
1622 check the psymtab's. If a psymtab indicates the existence
1623 of the desired name as a file-level static, then do psymtab-to-symtab
1624 conversion on the fly and return the found symbol. */
1626 ALL_OBJFILES (objfile
)
1629 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, STATIC_BLOCK
,
1630 name
, STRUCT_DOMAIN
);
1632 ALL_OBJFILE_SYMTABS (objfile
, s
)
1634 bv
= BLOCKVECTOR (s
);
1635 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1636 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1637 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1639 return SYMBOL_TYPE (sym
);
1644 ALL_OBJFILES (objfile
)
1646 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1651 return (struct type
*) 0;
1655 /* Find the name of the file containing main(). */
1656 /* FIXME: What about languages without main() or specially linked
1657 executables that have no main() ? */
1660 find_main_filename (void)
1662 struct objfile
*objfile
;
1663 char *name
= main_name ();
1665 ALL_OBJFILES (objfile
)
1671 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1678 /* Search BLOCK for symbol NAME in DOMAIN.
1680 Note that if NAME is the demangled form of a C++ symbol, we will fail
1681 to find a match during the binary search of the non-encoded names, but
1682 for now we don't worry about the slight inefficiency of looking for
1683 a match we'll never find, since it will go pretty quick. Once the
1684 binary search terminates, we drop through and do a straight linear
1685 search on the symbols. Each symbol which is marked as being a ObjC/C++
1686 symbol (language_cplus or language_objc set) has both the encoded and
1687 non-encoded names tested for a match. */
1690 lookup_block_symbol (const struct block
*block
, const char *name
,
1691 const domain_enum domain
)
1693 struct dict_iterator iter
;
1696 if (!BLOCK_FUNCTION (block
))
1698 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1700 sym
= dict_iter_name_next (name
, &iter
))
1702 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1703 SYMBOL_DOMAIN (sym
), domain
))
1710 /* Note that parameter symbols do not always show up last in the
1711 list; this loop makes sure to take anything else other than
1712 parameter symbols first; it only uses parameter symbols as a
1713 last resort. Note that this only takes up extra computation
1716 struct symbol
*sym_found
= NULL
;
1718 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1720 sym
= dict_iter_name_next (name
, &iter
))
1722 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1723 SYMBOL_DOMAIN (sym
), domain
))
1726 if (!SYMBOL_IS_ARGUMENT (sym
))
1732 return (sym_found
); /* Will be NULL if not found. */
1736 /* Find the symtab associated with PC and SECTION. Look through the
1737 psymtabs and read in another symtab if necessary. */
1740 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
1743 struct blockvector
*bv
;
1744 struct symtab
*s
= NULL
;
1745 struct symtab
*best_s
= NULL
;
1746 struct objfile
*objfile
;
1747 struct program_space
*pspace
;
1748 CORE_ADDR distance
= 0;
1749 struct minimal_symbol
*msymbol
;
1751 pspace
= current_program_space
;
1753 /* If we know that this is not a text address, return failure. This is
1754 necessary because we loop based on the block's high and low code
1755 addresses, which do not include the data ranges, and because
1756 we call find_pc_sect_psymtab which has a similar restriction based
1757 on the partial_symtab's texthigh and textlow. */
1758 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1760 && (MSYMBOL_TYPE (msymbol
) == mst_data
1761 || MSYMBOL_TYPE (msymbol
) == mst_bss
1762 || MSYMBOL_TYPE (msymbol
) == mst_abs
1763 || MSYMBOL_TYPE (msymbol
) == mst_file_data
1764 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
1767 /* Search all symtabs for the one whose file contains our address, and which
1768 is the smallest of all the ones containing the address. This is designed
1769 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1770 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1771 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1773 This happens for native ecoff format, where code from included files
1774 gets its own symtab. The symtab for the included file should have
1775 been read in already via the dependency mechanism.
1776 It might be swifter to create several symtabs with the same name
1777 like xcoff does (I'm not sure).
1779 It also happens for objfiles that have their functions reordered.
1780 For these, the symtab we are looking for is not necessarily read in. */
1782 ALL_PRIMARY_SYMTABS (objfile
, s
)
1784 bv
= BLOCKVECTOR (s
);
1785 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1787 if (BLOCK_START (b
) <= pc
1788 && BLOCK_END (b
) > pc
1790 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
1792 /* For an objfile that has its functions reordered,
1793 find_pc_psymtab will find the proper partial symbol table
1794 and we simply return its corresponding symtab. */
1795 /* In order to better support objfiles that contain both
1796 stabs and coff debugging info, we continue on if a psymtab
1798 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
1800 struct symtab
*result
;
1803 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1812 struct dict_iterator iter
;
1813 struct symbol
*sym
= NULL
;
1815 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1817 fixup_symbol_section (sym
, objfile
);
1818 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
1822 continue; /* No symbol in this symtab matches
1825 distance
= BLOCK_END (b
) - BLOCK_START (b
);
1833 ALL_OBJFILES (objfile
)
1835 struct symtab
*result
;
1839 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1850 /* Find the symtab associated with PC. Look through the psymtabs and read
1851 in another symtab if necessary. Backward compatibility, no section. */
1854 find_pc_symtab (CORE_ADDR pc
)
1856 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
1860 /* Find the source file and line number for a given PC value and SECTION.
1861 Return a structure containing a symtab pointer, a line number,
1862 and a pc range for the entire source line.
1863 The value's .pc field is NOT the specified pc.
1864 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1865 use the line that ends there. Otherwise, in that case, the line
1866 that begins there is used. */
1868 /* The big complication here is that a line may start in one file, and end just
1869 before the start of another file. This usually occurs when you #include
1870 code in the middle of a subroutine. To properly find the end of a line's PC
1871 range, we must search all symtabs associated with this compilation unit, and
1872 find the one whose first PC is closer than that of the next line in this
1875 /* If it's worth the effort, we could be using a binary search. */
1877 struct symtab_and_line
1878 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
1881 struct linetable
*l
;
1884 struct linetable_entry
*item
;
1885 struct symtab_and_line val
;
1886 struct blockvector
*bv
;
1887 struct minimal_symbol
*msymbol
;
1888 struct minimal_symbol
*mfunsym
;
1889 struct objfile
*objfile
;
1891 /* Info on best line seen so far, and where it starts, and its file. */
1893 struct linetable_entry
*best
= NULL
;
1894 CORE_ADDR best_end
= 0;
1895 struct symtab
*best_symtab
= 0;
1897 /* Store here the first line number
1898 of a file which contains the line at the smallest pc after PC.
1899 If we don't find a line whose range contains PC,
1900 we will use a line one less than this,
1901 with a range from the start of that file to the first line's pc. */
1902 struct linetable_entry
*alt
= NULL
;
1903 struct symtab
*alt_symtab
= 0;
1905 /* Info on best line seen in this file. */
1907 struct linetable_entry
*prev
;
1909 /* If this pc is not from the current frame,
1910 it is the address of the end of a call instruction.
1911 Quite likely that is the start of the following statement.
1912 But what we want is the statement containing the instruction.
1913 Fudge the pc to make sure we get that. */
1915 init_sal (&val
); /* initialize to zeroes */
1917 val
.pspace
= current_program_space
;
1919 /* It's tempting to assume that, if we can't find debugging info for
1920 any function enclosing PC, that we shouldn't search for line
1921 number info, either. However, GAS can emit line number info for
1922 assembly files --- very helpful when debugging hand-written
1923 assembly code. In such a case, we'd have no debug info for the
1924 function, but we would have line info. */
1929 /* elz: added this because this function returned the wrong
1930 information if the pc belongs to a stub (import/export)
1931 to call a shlib function. This stub would be anywhere between
1932 two functions in the target, and the line info was erroneously
1933 taken to be the one of the line before the pc. */
1935 /* RT: Further explanation:
1937 * We have stubs (trampolines) inserted between procedures.
1939 * Example: "shr1" exists in a shared library, and a "shr1" stub also
1940 * exists in the main image.
1942 * In the minimal symbol table, we have a bunch of symbols
1943 * sorted by start address. The stubs are marked as "trampoline",
1944 * the others appear as text. E.g.:
1946 * Minimal symbol table for main image
1947 * main: code for main (text symbol)
1948 * shr1: stub (trampoline symbol)
1949 * foo: code for foo (text symbol)
1951 * Minimal symbol table for "shr1" image:
1953 * shr1: code for shr1 (text symbol)
1956 * So the code below is trying to detect if we are in the stub
1957 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
1958 * and if found, do the symbolization from the real-code address
1959 * rather than the stub address.
1961 * Assumptions being made about the minimal symbol table:
1962 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
1963 * if we're really in the trampoline.s If we're beyond it (say
1964 * we're in "foo" in the above example), it'll have a closer
1965 * symbol (the "foo" text symbol for example) and will not
1966 * return the trampoline.
1967 * 2. lookup_minimal_symbol_text() will find a real text symbol
1968 * corresponding to the trampoline, and whose address will
1969 * be different than the trampoline address. I put in a sanity
1970 * check for the address being the same, to avoid an
1971 * infinite recursion.
1973 msymbol
= lookup_minimal_symbol_by_pc (pc
);
1974 if (msymbol
!= NULL
)
1975 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
1977 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
1979 if (mfunsym
== NULL
)
1980 /* I eliminated this warning since it is coming out
1981 * in the following situation:
1982 * gdb shmain // test program with shared libraries
1983 * (gdb) break shr1 // function in shared lib
1984 * Warning: In stub for ...
1985 * In the above situation, the shared lib is not loaded yet,
1986 * so of course we can't find the real func/line info,
1987 * but the "break" still works, and the warning is annoying.
1988 * So I commented out the warning. RT */
1989 /* warning ("In stub for %s; unable to find real function/line info",
1990 SYMBOL_LINKAGE_NAME (msymbol)); */
1993 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
1994 == SYMBOL_VALUE_ADDRESS (msymbol
))
1995 /* Avoid infinite recursion */
1996 /* See above comment about why warning is commented out. */
1997 /* warning ("In stub for %s; unable to find real function/line info",
1998 SYMBOL_LINKAGE_NAME (msymbol)); */
2002 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2006 s
= find_pc_sect_symtab (pc
, section
);
2009 /* If no symbol information, return previous pc. */
2016 bv
= BLOCKVECTOR (s
);
2017 objfile
= s
->objfile
;
2019 /* Look at all the symtabs that share this blockvector.
2020 They all have the same apriori range, that we found was right;
2021 but they have different line tables. */
2023 ALL_OBJFILE_SYMTABS (objfile
, s
)
2025 if (BLOCKVECTOR (s
) != bv
)
2028 /* Find the best line in this symtab. */
2035 /* I think len can be zero if the symtab lacks line numbers
2036 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2037 I'm not sure which, and maybe it depends on the symbol
2043 item
= l
->item
; /* Get first line info. */
2045 /* Is this file's first line closer than the first lines of other files?
2046 If so, record this file, and its first line, as best alternate. */
2047 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2053 for (i
= 0; i
< len
; i
++, item
++)
2055 /* Leave prev pointing to the linetable entry for the last line
2056 that started at or before PC. */
2063 /* At this point, prev points at the line whose start addr is <= pc, and
2064 item points at the next line. If we ran off the end of the linetable
2065 (pc >= start of the last line), then prev == item. If pc < start of
2066 the first line, prev will not be set. */
2068 /* Is this file's best line closer than the best in the other files?
2069 If so, record this file, and its best line, as best so far. Don't
2070 save prev if it represents the end of a function (i.e. line number
2071 0) instead of a real line. */
2073 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2078 /* Discard BEST_END if it's before the PC of the current BEST. */
2079 if (best_end
<= best
->pc
)
2083 /* If another line (denoted by ITEM) is in the linetable and its
2084 PC is after BEST's PC, but before the current BEST_END, then
2085 use ITEM's PC as the new best_end. */
2086 if (best
&& i
< len
&& item
->pc
> best
->pc
2087 && (best_end
== 0 || best_end
> item
->pc
))
2088 best_end
= item
->pc
;
2093 /* If we didn't find any line number info, just return zeros.
2094 We used to return alt->line - 1 here, but that could be
2095 anywhere; if we don't have line number info for this PC,
2096 don't make some up. */
2099 else if (best
->line
== 0)
2101 /* If our best fit is in a range of PC's for which no line
2102 number info is available (line number is zero) then we didn't
2103 find any valid line information. */
2108 val
.symtab
= best_symtab
;
2109 val
.line
= best
->line
;
2111 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2116 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2118 val
.section
= section
;
2122 /* Backward compatibility (no section). */
2124 struct symtab_and_line
2125 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2127 struct obj_section
*section
;
2129 section
= find_pc_overlay (pc
);
2130 if (pc_in_unmapped_range (pc
, section
))
2131 pc
= overlay_mapped_address (pc
, section
);
2132 return find_pc_sect_line (pc
, section
, notcurrent
);
2135 /* Find line number LINE in any symtab whose name is the same as
2138 If found, return the symtab that contains the linetable in which it was
2139 found, set *INDEX to the index in the linetable of the best entry
2140 found, and set *EXACT_MATCH nonzero if the value returned is an
2143 If not found, return NULL. */
2146 find_line_symtab (struct symtab
*symtab
, int line
,
2147 int *index
, int *exact_match
)
2149 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2151 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2155 struct linetable
*best_linetable
;
2156 struct symtab
*best_symtab
;
2158 /* First try looking it up in the given symtab. */
2159 best_linetable
= LINETABLE (symtab
);
2160 best_symtab
= symtab
;
2161 best_index
= find_line_common (best_linetable
, line
, &exact
);
2162 if (best_index
< 0 || !exact
)
2164 /* Didn't find an exact match. So we better keep looking for
2165 another symtab with the same name. In the case of xcoff,
2166 multiple csects for one source file (produced by IBM's FORTRAN
2167 compiler) produce multiple symtabs (this is unavoidable
2168 assuming csects can be at arbitrary places in memory and that
2169 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2171 /* BEST is the smallest linenumber > LINE so far seen,
2172 or 0 if none has been seen so far.
2173 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2176 struct objfile
*objfile
;
2179 if (best_index
>= 0)
2180 best
= best_linetable
->item
[best_index
].line
;
2184 ALL_OBJFILES (objfile
)
2187 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2191 /* Get symbol full file name if possible. */
2192 symtab_to_fullname (symtab
);
2194 ALL_SYMTABS (objfile
, s
)
2196 struct linetable
*l
;
2199 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2201 if (symtab
->fullname
!= NULL
2202 && symtab_to_fullname (s
) != NULL
2203 && FILENAME_CMP (symtab
->fullname
, s
->fullname
) != 0)
2206 ind
= find_line_common (l
, line
, &exact
);
2216 if (best
== 0 || l
->item
[ind
].line
< best
)
2218 best
= l
->item
[ind
].line
;
2231 *index
= best_index
;
2233 *exact_match
= exact
;
2238 /* Set the PC value for a given source file and line number and return true.
2239 Returns zero for invalid line number (and sets the PC to 0).
2240 The source file is specified with a struct symtab. */
2243 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2245 struct linetable
*l
;
2252 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2255 l
= LINETABLE (symtab
);
2256 *pc
= l
->item
[ind
].pc
;
2263 /* Find the range of pc values in a line.
2264 Store the starting pc of the line into *STARTPTR
2265 and the ending pc (start of next line) into *ENDPTR.
2266 Returns 1 to indicate success.
2267 Returns 0 if could not find the specified line. */
2270 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2273 CORE_ADDR startaddr
;
2274 struct symtab_and_line found_sal
;
2277 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2280 /* This whole function is based on address. For example, if line 10 has
2281 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2282 "info line *0x123" should say the line goes from 0x100 to 0x200
2283 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2284 This also insures that we never give a range like "starts at 0x134
2285 and ends at 0x12c". */
2287 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2288 if (found_sal
.line
!= sal
.line
)
2290 /* The specified line (sal) has zero bytes. */
2291 *startptr
= found_sal
.pc
;
2292 *endptr
= found_sal
.pc
;
2296 *startptr
= found_sal
.pc
;
2297 *endptr
= found_sal
.end
;
2302 /* Given a line table and a line number, return the index into the line
2303 table for the pc of the nearest line whose number is >= the specified one.
2304 Return -1 if none is found. The value is >= 0 if it is an index.
2306 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2309 find_line_common (struct linetable
*l
, int lineno
,
2315 /* BEST is the smallest linenumber > LINENO so far seen,
2316 or 0 if none has been seen so far.
2317 BEST_INDEX identifies the item for it. */
2319 int best_index
= -1;
2330 for (i
= 0; i
< len
; i
++)
2332 struct linetable_entry
*item
= &(l
->item
[i
]);
2334 if (item
->line
== lineno
)
2336 /* Return the first (lowest address) entry which matches. */
2341 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2348 /* If we got here, we didn't get an exact match. */
2353 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2355 struct symtab_and_line sal
;
2357 sal
= find_pc_line (pc
, 0);
2360 return sal
.symtab
!= 0;
2363 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2364 address for that function that has an entry in SYMTAB's line info
2365 table. If such an entry cannot be found, return FUNC_ADDR
2368 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2370 CORE_ADDR func_start
, func_end
;
2371 struct linetable
*l
;
2374 /* Give up if this symbol has no lineinfo table. */
2375 l
= LINETABLE (symtab
);
2379 /* Get the range for the function's PC values, or give up if we
2380 cannot, for some reason. */
2381 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2384 /* Linetable entries are ordered by PC values, see the commentary in
2385 symtab.h where `struct linetable' is defined. Thus, the first
2386 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2387 address we are looking for. */
2388 for (i
= 0; i
< l
->nitems
; i
++)
2390 struct linetable_entry
*item
= &(l
->item
[i
]);
2392 /* Don't use line numbers of zero, they mark special entries in
2393 the table. See the commentary on symtab.h before the
2394 definition of struct linetable. */
2395 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2402 /* Given a function symbol SYM, find the symtab and line for the start
2404 If the argument FUNFIRSTLINE is nonzero, we want the first line
2405 of real code inside the function. */
2407 struct symtab_and_line
2408 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2410 struct symtab_and_line sal
;
2412 fixup_symbol_section (sym
, NULL
);
2413 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2414 SYMBOL_OBJ_SECTION (sym
), 0);
2416 /* We always should have a line for the function start address.
2417 If we don't, something is odd. Create a plain SAL refering
2418 just the PC and hope that skip_prologue_sal (if requested)
2419 can find a line number for after the prologue. */
2420 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2423 sal
.pspace
= current_program_space
;
2424 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2425 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2429 skip_prologue_sal (&sal
);
2434 /* Adjust SAL to the first instruction past the function prologue.
2435 If the PC was explicitly specified, the SAL is not changed.
2436 If the line number was explicitly specified, at most the SAL's PC
2437 is updated. If SAL is already past the prologue, then do nothing. */
2439 skip_prologue_sal (struct symtab_and_line
*sal
)
2442 struct symtab_and_line start_sal
;
2443 struct cleanup
*old_chain
;
2445 struct obj_section
*section
;
2447 struct objfile
*objfile
;
2448 struct gdbarch
*gdbarch
;
2449 struct block
*b
, *function_block
;
2451 /* Do not change the SAL is PC was specified explicitly. */
2452 if (sal
->explicit_pc
)
2455 old_chain
= save_current_space_and_thread ();
2456 switch_to_program_space_and_thread (sal
->pspace
);
2458 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2461 fixup_symbol_section (sym
, NULL
);
2463 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2464 section
= SYMBOL_OBJ_SECTION (sym
);
2465 name
= SYMBOL_LINKAGE_NAME (sym
);
2466 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2470 struct minimal_symbol
*msymbol
2471 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2473 if (msymbol
== NULL
)
2475 do_cleanups (old_chain
);
2479 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2480 section
= SYMBOL_OBJ_SECTION (msymbol
);
2481 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2482 objfile
= msymbol_objfile (msymbol
);
2485 gdbarch
= get_objfile_arch (objfile
);
2487 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2488 so that gdbarch_skip_prologue has something unique to work on. */
2489 if (section_is_overlay (section
) && !section_is_mapped (section
))
2490 pc
= overlay_unmapped_address (pc
, section
);
2492 /* Skip "first line" of function (which is actually its prologue). */
2493 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2494 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2496 /* For overlays, map pc back into its mapped VMA range. */
2497 pc
= overlay_mapped_address (pc
, section
);
2499 /* Calculate line number. */
2500 start_sal
= find_pc_sect_line (pc
, section
, 0);
2502 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2503 line is still part of the same function. */
2504 if (start_sal
.pc
!= pc
2505 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2506 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2507 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2508 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2510 /* First pc of next line */
2512 /* Recalculate the line number (might not be N+1). */
2513 start_sal
= find_pc_sect_line (pc
, section
, 0);
2516 /* On targets with executable formats that don't have a concept of
2517 constructors (ELF with .init has, PE doesn't), gcc emits a call
2518 to `__main' in `main' between the prologue and before user
2520 if (gdbarch_skip_main_prologue_p (gdbarch
)
2521 && name
&& strcmp (name
, "main") == 0)
2523 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2524 /* Recalculate the line number (might not be N+1). */
2525 start_sal
= find_pc_sect_line (pc
, section
, 0);
2528 /* If we still don't have a valid source line, try to find the first
2529 PC in the lineinfo table that belongs to the same function. This
2530 happens with COFF debug info, which does not seem to have an
2531 entry in lineinfo table for the code after the prologue which has
2532 no direct relation to source. For example, this was found to be
2533 the case with the DJGPP target using "gcc -gcoff" when the
2534 compiler inserted code after the prologue to make sure the stack
2536 if (sym
&& start_sal
.symtab
== NULL
)
2538 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2539 /* Recalculate the line number. */
2540 start_sal
= find_pc_sect_line (pc
, section
, 0);
2543 do_cleanups (old_chain
);
2545 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2546 forward SAL to the end of the prologue. */
2551 sal
->section
= section
;
2553 /* Unless the explicit_line flag was set, update the SAL line
2554 and symtab to correspond to the modified PC location. */
2555 if (sal
->explicit_line
)
2558 sal
->symtab
= start_sal
.symtab
;
2559 sal
->line
= start_sal
.line
;
2560 sal
->end
= start_sal
.end
;
2562 /* Check if we are now inside an inlined function. If we can,
2563 use the call site of the function instead. */
2564 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2565 function_block
= NULL
;
2568 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2570 else if (BLOCK_FUNCTION (b
) != NULL
)
2572 b
= BLOCK_SUPERBLOCK (b
);
2574 if (function_block
!= NULL
2575 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2577 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2578 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2582 /* If P is of the form "operator[ \t]+..." where `...' is
2583 some legitimate operator text, return a pointer to the
2584 beginning of the substring of the operator text.
2585 Otherwise, return "". */
2587 operator_chars (char *p
, char **end
)
2590 if (strncmp (p
, "operator", 8))
2594 /* Don't get faked out by `operator' being part of a longer
2596 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2599 /* Allow some whitespace between `operator' and the operator symbol. */
2600 while (*p
== ' ' || *p
== '\t')
2603 /* Recognize 'operator TYPENAME'. */
2605 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2609 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2618 case '\\': /* regexp quoting */
2621 if (p
[2] == '=') /* 'operator\*=' */
2623 else /* 'operator\*' */
2627 else if (p
[1] == '[')
2630 error (_("mismatched quoting on brackets, "
2631 "try 'operator\\[\\]'"));
2632 else if (p
[2] == '\\' && p
[3] == ']')
2634 *end
= p
+ 4; /* 'operator\[\]' */
2638 error (_("nothing is allowed between '[' and ']'"));
2642 /* Gratuitous qoute: skip it and move on. */
2664 if (p
[0] == '-' && p
[1] == '>')
2666 /* Struct pointer member operator 'operator->'. */
2669 *end
= p
+ 3; /* 'operator->*' */
2672 else if (p
[2] == '\\')
2674 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2679 *end
= p
+ 2; /* 'operator->' */
2683 if (p
[1] == '=' || p
[1] == p
[0])
2694 error (_("`operator ()' must be specified "
2695 "without whitespace in `()'"));
2700 error (_("`operator ?:' must be specified "
2701 "without whitespace in `?:'"));
2706 error (_("`operator []' must be specified "
2707 "without whitespace in `[]'"));
2711 error (_("`operator %s' not supported"), p
);
2720 /* If FILE is not already in the table of files, return zero;
2721 otherwise return non-zero. Optionally add FILE to the table if ADD
2722 is non-zero. If *FIRST is non-zero, forget the old table
2725 filename_seen (const char *file
, int add
, int *first
)
2727 /* Table of files seen so far. */
2728 static const char **tab
= NULL
;
2729 /* Allocated size of tab in elements.
2730 Start with one 256-byte block (when using GNU malloc.c).
2731 24 is the malloc overhead when range checking is in effect. */
2732 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2733 /* Current size of tab in elements. */
2734 static int tab_cur_size
;
2740 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2744 /* Is FILE in tab? */
2745 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2746 if (filename_cmp (*p
, file
) == 0)
2749 /* No; maybe add it to tab. */
2752 if (tab_cur_size
== tab_alloc_size
)
2754 tab_alloc_size
*= 2;
2755 tab
= (const char **) xrealloc ((char *) tab
,
2756 tab_alloc_size
* sizeof (*tab
));
2758 tab
[tab_cur_size
++] = file
;
2764 /* Slave routine for sources_info. Force line breaks at ,'s.
2765 NAME is the name to print and *FIRST is nonzero if this is the first
2766 name printed. Set *FIRST to zero. */
2768 output_source_filename (const char *name
, int *first
)
2770 /* Since a single source file can result in several partial symbol
2771 tables, we need to avoid printing it more than once. Note: if
2772 some of the psymtabs are read in and some are not, it gets
2773 printed both under "Source files for which symbols have been
2774 read" and "Source files for which symbols will be read in on
2775 demand". I consider this a reasonable way to deal with the
2776 situation. I'm not sure whether this can also happen for
2777 symtabs; it doesn't hurt to check. */
2779 /* Was NAME already seen? */
2780 if (filename_seen (name
, 1, first
))
2782 /* Yes; don't print it again. */
2785 /* No; print it and reset *FIRST. */
2792 printf_filtered (", ");
2796 fputs_filtered (name
, gdb_stdout
);
2799 /* A callback for map_partial_symbol_filenames. */
2801 output_partial_symbol_filename (const char *fullname
, const char *filename
,
2804 output_source_filename (fullname
? fullname
: filename
, data
);
2808 sources_info (char *ignore
, int from_tty
)
2811 struct objfile
*objfile
;
2814 if (!have_full_symbols () && !have_partial_symbols ())
2816 error (_("No symbol table is loaded. Use the \"file\" command."));
2819 printf_filtered ("Source files for which symbols have been read in:\n\n");
2822 ALL_SYMTABS (objfile
, s
)
2824 const char *fullname
= symtab_to_fullname (s
);
2826 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2828 printf_filtered ("\n\n");
2830 printf_filtered ("Source files for which symbols "
2831 "will be read in on demand:\n\n");
2834 map_partial_symbol_filenames (output_partial_symbol_filename
, &first
);
2835 printf_filtered ("\n");
2839 file_matches (const char *file
, char *files
[], int nfiles
)
2843 if (file
!= NULL
&& nfiles
!= 0)
2845 for (i
= 0; i
< nfiles
; i
++)
2847 if (filename_cmp (files
[i
], lbasename (file
)) == 0)
2851 else if (nfiles
== 0)
2856 /* Free any memory associated with a search. */
2858 free_search_symbols (struct symbol_search
*symbols
)
2860 struct symbol_search
*p
;
2861 struct symbol_search
*next
;
2863 for (p
= symbols
; p
!= NULL
; p
= next
)
2871 do_free_search_symbols_cleanup (void *symbols
)
2873 free_search_symbols (symbols
);
2877 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2879 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2882 /* Helper function for sort_search_symbols and qsort. Can only
2883 sort symbols, not minimal symbols. */
2885 compare_search_syms (const void *sa
, const void *sb
)
2887 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2888 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2890 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2891 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2894 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2895 prevtail where it is, but update its next pointer to point to
2896 the first of the sorted symbols. */
2897 static struct symbol_search
*
2898 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2900 struct symbol_search
**symbols
, *symp
, *old_next
;
2903 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2905 symp
= prevtail
->next
;
2906 for (i
= 0; i
< nfound
; i
++)
2911 /* Generally NULL. */
2914 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2915 compare_search_syms
);
2918 for (i
= 0; i
< nfound
; i
++)
2920 symp
->next
= symbols
[i
];
2923 symp
->next
= old_next
;
2929 /* An object of this type is passed as the user_data to the
2930 expand_symtabs_matching method. */
2931 struct search_symbols_data
2936 /* It is true if PREG contains valid data, false otherwise. */
2937 unsigned preg_p
: 1;
2941 /* A callback for expand_symtabs_matching. */
2943 search_symbols_file_matches (const char *filename
, void *user_data
)
2945 struct search_symbols_data
*data
= user_data
;
2947 return file_matches (filename
, data
->files
, data
->nfiles
);
2950 /* A callback for expand_symtabs_matching. */
2952 search_symbols_name_matches (const char *symname
, void *user_data
)
2954 struct search_symbols_data
*data
= user_data
;
2956 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
2959 /* Search the symbol table for matches to the regular expression REGEXP,
2960 returning the results in *MATCHES.
2962 Only symbols of KIND are searched:
2963 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2964 and constants (enums)
2965 FUNCTIONS_DOMAIN - search all functions
2966 TYPES_DOMAIN - search all type names
2967 ALL_DOMAIN - an internal error for this function
2969 free_search_symbols should be called when *MATCHES is no longer needed.
2971 The results are sorted locally; each symtab's global and static blocks are
2972 separately alphabetized. */
2975 search_symbols (char *regexp
, enum search_domain kind
,
2976 int nfiles
, char *files
[],
2977 struct symbol_search
**matches
)
2980 struct blockvector
*bv
;
2983 struct dict_iterator iter
;
2985 struct objfile
*objfile
;
2986 struct minimal_symbol
*msymbol
;
2989 static const enum minimal_symbol_type types
[]
2990 = {mst_data
, mst_text
, mst_abs
};
2991 static const enum minimal_symbol_type types2
[]
2992 = {mst_bss
, mst_file_text
, mst_abs
};
2993 static const enum minimal_symbol_type types3
[]
2994 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
2995 static const enum minimal_symbol_type types4
[]
2996 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
2997 enum minimal_symbol_type ourtype
;
2998 enum minimal_symbol_type ourtype2
;
2999 enum minimal_symbol_type ourtype3
;
3000 enum minimal_symbol_type ourtype4
;
3001 struct symbol_search
*sr
;
3002 struct symbol_search
*psr
;
3003 struct symbol_search
*tail
;
3004 struct search_symbols_data datum
;
3006 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3007 CLEANUP_CHAIN is freed only in the case of an error. */
3008 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3009 struct cleanup
*retval_chain
;
3011 gdb_assert (kind
<= TYPES_DOMAIN
);
3013 ourtype
= types
[kind
];
3014 ourtype2
= types2
[kind
];
3015 ourtype3
= types3
[kind
];
3016 ourtype4
= types4
[kind
];
3018 sr
= *matches
= NULL
;
3024 /* Make sure spacing is right for C++ operators.
3025 This is just a courtesy to make the matching less sensitive
3026 to how many spaces the user leaves between 'operator'
3027 and <TYPENAME> or <OPERATOR>. */
3029 char *opname
= operator_chars (regexp
, &opend
);
3034 int fix
= -1; /* -1 means ok; otherwise number of
3037 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3039 /* There should 1 space between 'operator' and 'TYPENAME'. */
3040 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3045 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3046 if (opname
[-1] == ' ')
3049 /* If wrong number of spaces, fix it. */
3052 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3054 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3059 errcode
= regcomp (&datum
.preg
, regexp
,
3060 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3064 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3066 make_cleanup (xfree
, err
);
3067 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3070 make_regfree_cleanup (&datum
.preg
);
3073 /* Search through the partial symtabs *first* for all symbols
3074 matching the regexp. That way we don't have to reproduce all of
3075 the machinery below. */
3077 datum
.nfiles
= nfiles
;
3078 datum
.files
= files
;
3079 ALL_OBJFILES (objfile
)
3082 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3083 search_symbols_file_matches
,
3084 search_symbols_name_matches
,
3089 retval_chain
= old_chain
;
3091 /* Here, we search through the minimal symbol tables for functions
3092 and variables that match, and force their symbols to be read.
3093 This is in particular necessary for demangled variable names,
3094 which are no longer put into the partial symbol tables.
3095 The symbol will then be found during the scan of symtabs below.
3097 For functions, find_pc_symtab should succeed if we have debug info
3098 for the function, for variables we have to call lookup_symbol
3099 to determine if the variable has debug info.
3100 If the lookup fails, set found_misc so that we will rescan to print
3101 any matching symbols without debug info. */
3103 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3105 ALL_MSYMBOLS (objfile
, msymbol
)
3109 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3110 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3111 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3112 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3115 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3118 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3120 /* FIXME: carlton/2003-02-04: Given that the
3121 semantics of lookup_symbol keeps on changing
3122 slightly, it would be a nice idea if we had a
3123 function lookup_symbol_minsym that found the
3124 symbol associated to a given minimal symbol (if
3126 if (kind
== FUNCTIONS_DOMAIN
3127 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3128 (struct block
*) NULL
,
3138 ALL_PRIMARY_SYMTABS (objfile
, s
)
3140 bv
= BLOCKVECTOR (s
);
3141 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3143 struct symbol_search
*prevtail
= tail
;
3146 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3147 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3149 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3153 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3155 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3157 && ((kind
== VARIABLES_DOMAIN
3158 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3159 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3160 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3161 /* LOC_CONST can be used for more than just enums,
3162 e.g., c++ static const members.
3163 We only want to skip enums here. */
3164 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3165 && TYPE_CODE (SYMBOL_TYPE (sym
))
3167 || (kind
== FUNCTIONS_DOMAIN
3168 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3169 || (kind
== TYPES_DOMAIN
3170 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3173 psr
= (struct symbol_search
*)
3174 xmalloc (sizeof (struct symbol_search
));
3176 psr
->symtab
= real_symtab
;
3178 psr
->msymbol
= NULL
;
3190 if (prevtail
== NULL
)
3192 struct symbol_search dummy
;
3195 tail
= sort_search_symbols (&dummy
, nfound
);
3198 make_cleanup_free_search_symbols (sr
);
3201 tail
= sort_search_symbols (prevtail
, nfound
);
3206 /* If there are no eyes, avoid all contact. I mean, if there are
3207 no debug symbols, then print directly from the msymbol_vector. */
3209 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3211 ALL_MSYMBOLS (objfile
, msymbol
)
3215 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3216 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3217 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3218 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3221 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3224 /* Functions: Look up by address. */
3225 if (kind
!= FUNCTIONS_DOMAIN
||
3226 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3228 /* Variables/Absolutes: Look up by name. */
3229 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3230 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3234 psr
= (struct symbol_search
*)
3235 xmalloc (sizeof (struct symbol_search
));
3237 psr
->msymbol
= msymbol
;
3244 make_cleanup_free_search_symbols (sr
);
3256 discard_cleanups (retval_chain
);
3257 do_cleanups (old_chain
);
3261 /* Helper function for symtab_symbol_info, this function uses
3262 the data returned from search_symbols() to print information
3263 regarding the match to gdb_stdout. */
3266 print_symbol_info (enum search_domain kind
,
3267 struct symtab
*s
, struct symbol
*sym
,
3268 int block
, char *last
)
3270 if (last
== NULL
|| filename_cmp (last
, s
->filename
) != 0)
3272 fputs_filtered ("\nFile ", gdb_stdout
);
3273 fputs_filtered (s
->filename
, gdb_stdout
);
3274 fputs_filtered (":\n", gdb_stdout
);
3277 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3278 printf_filtered ("static ");
3280 /* Typedef that is not a C++ class. */
3281 if (kind
== TYPES_DOMAIN
3282 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3283 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3284 /* variable, func, or typedef-that-is-c++-class. */
3285 else if (kind
< TYPES_DOMAIN
||
3286 (kind
== TYPES_DOMAIN
&&
3287 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3289 type_print (SYMBOL_TYPE (sym
),
3290 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3291 ? "" : SYMBOL_PRINT_NAME (sym
)),
3294 printf_filtered (";\n");
3298 /* This help function for symtab_symbol_info() prints information
3299 for non-debugging symbols to gdb_stdout. */
3302 print_msymbol_info (struct minimal_symbol
*msymbol
)
3304 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3307 if (gdbarch_addr_bit (gdbarch
) <= 32)
3308 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3309 & (CORE_ADDR
) 0xffffffff,
3312 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3314 printf_filtered ("%s %s\n",
3315 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3318 /* This is the guts of the commands "info functions", "info types", and
3319 "info variables". It calls search_symbols to find all matches and then
3320 print_[m]symbol_info to print out some useful information about the
3324 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3326 static const char * const classnames
[] =
3327 {"variable", "function", "type"};
3328 struct symbol_search
*symbols
;
3329 struct symbol_search
*p
;
3330 struct cleanup
*old_chain
;
3331 char *last_filename
= NULL
;
3334 gdb_assert (kind
<= TYPES_DOMAIN
);
3336 /* Must make sure that if we're interrupted, symbols gets freed. */
3337 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3338 old_chain
= make_cleanup_free_search_symbols (symbols
);
3340 printf_filtered (regexp
3341 ? "All %ss matching regular expression \"%s\":\n"
3342 : "All defined %ss:\n",
3343 classnames
[kind
], regexp
);
3345 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3349 if (p
->msymbol
!= NULL
)
3353 printf_filtered ("\nNon-debugging symbols:\n");
3356 print_msymbol_info (p
->msymbol
);
3360 print_symbol_info (kind
,
3365 last_filename
= p
->symtab
->filename
;
3369 do_cleanups (old_chain
);
3373 variables_info (char *regexp
, int from_tty
)
3375 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3379 functions_info (char *regexp
, int from_tty
)
3381 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3386 types_info (char *regexp
, int from_tty
)
3388 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3391 /* Breakpoint all functions matching regular expression. */
3394 rbreak_command_wrapper (char *regexp
, int from_tty
)
3396 rbreak_command (regexp
, from_tty
);
3399 /* A cleanup function that calls end_rbreak_breakpoints. */
3402 do_end_rbreak_breakpoints (void *ignore
)
3404 end_rbreak_breakpoints ();
3408 rbreak_command (char *regexp
, int from_tty
)
3410 struct symbol_search
*ss
;
3411 struct symbol_search
*p
;
3412 struct cleanup
*old_chain
;
3413 char *string
= NULL
;
3415 char **files
= NULL
, *file_name
;
3420 char *colon
= strchr (regexp
, ':');
3422 if (colon
&& *(colon
+ 1) != ':')
3426 colon_index
= colon
- regexp
;
3427 file_name
= alloca (colon_index
+ 1);
3428 memcpy (file_name
, regexp
, colon_index
);
3429 file_name
[colon_index
--] = 0;
3430 while (isspace (file_name
[colon_index
]))
3431 file_name
[colon_index
--] = 0;
3435 while (isspace (*regexp
)) regexp
++;
3439 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3440 old_chain
= make_cleanup_free_search_symbols (ss
);
3441 make_cleanup (free_current_contents
, &string
);
3443 start_rbreak_breakpoints ();
3444 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3445 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3447 if (p
->msymbol
== NULL
)
3449 int newlen
= (strlen (p
->symtab
->filename
)
3450 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3455 string
= xrealloc (string
, newlen
);
3458 strcpy (string
, p
->symtab
->filename
);
3459 strcat (string
, ":'");
3460 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3461 strcat (string
, "'");
3462 break_command (string
, from_tty
);
3463 print_symbol_info (FUNCTIONS_DOMAIN
,
3467 p
->symtab
->filename
);
3471 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3475 string
= xrealloc (string
, newlen
);
3478 strcpy (string
, "'");
3479 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3480 strcat (string
, "'");
3482 break_command (string
, from_tty
);
3483 printf_filtered ("<function, no debug info> %s;\n",
3484 SYMBOL_PRINT_NAME (p
->msymbol
));
3488 do_cleanups (old_chain
);
3492 /* Helper routine for make_symbol_completion_list. */
3494 static int return_val_size
;
3495 static int return_val_index
;
3496 static char **return_val
;
3498 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3499 completion_list_add_name \
3500 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3502 /* Test to see if the symbol specified by SYMNAME (which is already
3503 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3504 characters. If so, add it to the current completion list. */
3507 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3508 char *text
, char *word
)
3511 int (*ncmp
) (const char *, const char *, size_t);
3513 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3515 /* Clip symbols that cannot match. */
3517 if (ncmp (symname
, sym_text
, sym_text_len
) != 0)
3522 /* We have a match for a completion, so add SYMNAME to the current list
3523 of matches. Note that the name is moved to freshly malloc'd space. */
3528 if (word
== sym_text
)
3530 new = xmalloc (strlen (symname
) + 5);
3531 strcpy (new, symname
);
3533 else if (word
> sym_text
)
3535 /* Return some portion of symname. */
3536 new = xmalloc (strlen (symname
) + 5);
3537 strcpy (new, symname
+ (word
- sym_text
));
3541 /* Return some of SYM_TEXT plus symname. */
3542 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3543 strncpy (new, word
, sym_text
- word
);
3544 new[sym_text
- word
] = '\0';
3545 strcat (new, symname
);
3548 if (return_val_index
+ 3 > return_val_size
)
3550 newsize
= (return_val_size
*= 2) * sizeof (char *);
3551 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3553 return_val
[return_val_index
++] = new;
3554 return_val
[return_val_index
] = NULL
;
3558 /* ObjC: In case we are completing on a selector, look as the msymbol
3559 again and feed all the selectors into the mill. */
3562 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3563 int sym_text_len
, char *text
, char *word
)
3565 static char *tmp
= NULL
;
3566 static unsigned int tmplen
= 0;
3568 char *method
, *category
, *selector
;
3571 method
= SYMBOL_NATURAL_NAME (msymbol
);
3573 /* Is it a method? */
3574 if ((method
[0] != '-') && (method
[0] != '+'))
3577 if (sym_text
[0] == '[')
3578 /* Complete on shortened method method. */
3579 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3581 while ((strlen (method
) + 1) >= tmplen
)
3587 tmp
= xrealloc (tmp
, tmplen
);
3589 selector
= strchr (method
, ' ');
3590 if (selector
!= NULL
)
3593 category
= strchr (method
, '(');
3595 if ((category
!= NULL
) && (selector
!= NULL
))
3597 memcpy (tmp
, method
, (category
- method
));
3598 tmp
[category
- method
] = ' ';
3599 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3600 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3601 if (sym_text
[0] == '[')
3602 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3605 if (selector
!= NULL
)
3607 /* Complete on selector only. */
3608 strcpy (tmp
, selector
);
3609 tmp2
= strchr (tmp
, ']');
3613 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3617 /* Break the non-quoted text based on the characters which are in
3618 symbols. FIXME: This should probably be language-specific. */
3621 language_search_unquoted_string (char *text
, char *p
)
3623 for (; p
> text
; --p
)
3625 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3629 if ((current_language
->la_language
== language_objc
))
3631 if (p
[-1] == ':') /* Might be part of a method name. */
3633 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3634 p
-= 2; /* Beginning of a method name. */
3635 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3636 { /* Might be part of a method name. */
3639 /* Seeing a ' ' or a '(' is not conclusive evidence
3640 that we are in the middle of a method name. However,
3641 finding "-[" or "+[" should be pretty un-ambiguous.
3642 Unfortunately we have to find it now to decide. */
3645 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3646 t
[-1] == ' ' || t
[-1] == ':' ||
3647 t
[-1] == '(' || t
[-1] == ')')
3652 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3653 p
= t
- 2; /* Method name detected. */
3654 /* Else we leave with p unchanged. */
3664 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
3665 int sym_text_len
, char *text
, char *word
)
3667 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3669 struct type
*t
= SYMBOL_TYPE (sym
);
3670 enum type_code c
= TYPE_CODE (t
);
3673 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3674 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3675 if (TYPE_FIELD_NAME (t
, j
))
3676 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3677 sym_text
, sym_text_len
, text
, word
);
3681 /* Type of the user_data argument passed to add_macro_name or
3682 expand_partial_symbol_name. The contents are simply whatever is
3683 needed by completion_list_add_name. */
3684 struct add_name_data
3692 /* A callback used with macro_for_each and macro_for_each_in_scope.
3693 This adds a macro's name to the current completion list. */
3695 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
3698 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3700 completion_list_add_name ((char *) name
,
3701 datum
->sym_text
, datum
->sym_text_len
,
3702 datum
->text
, datum
->word
);
3705 /* A callback for expand_partial_symbol_names. */
3707 expand_partial_symbol_name (const char *name
, void *user_data
)
3709 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3710 int (*ncmp
) (const char *, const char *, size_t);
3712 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3714 return ncmp (name
, datum
->sym_text
, datum
->sym_text_len
) == 0;
3718 default_make_symbol_completion_list_break_on (char *text
, char *word
,
3719 const char *break_on
)
3721 /* Problem: All of the symbols have to be copied because readline
3722 frees them. I'm not going to worry about this; hopefully there
3723 won't be that many. */
3727 struct minimal_symbol
*msymbol
;
3728 struct objfile
*objfile
;
3730 const struct block
*surrounding_static_block
, *surrounding_global_block
;
3731 struct dict_iterator iter
;
3732 /* The symbol we are completing on. Points in same buffer as text. */
3734 /* Length of sym_text. */
3736 struct add_name_data datum
;
3738 /* Now look for the symbol we are supposed to complete on. */
3742 char *quote_pos
= NULL
;
3744 /* First see if this is a quoted string. */
3746 for (p
= text
; *p
!= '\0'; ++p
)
3748 if (quote_found
!= '\0')
3750 if (*p
== quote_found
)
3751 /* Found close quote. */
3753 else if (*p
== '\\' && p
[1] == quote_found
)
3754 /* A backslash followed by the quote character
3755 doesn't end the string. */
3758 else if (*p
== '\'' || *p
== '"')
3764 if (quote_found
== '\'')
3765 /* A string within single quotes can be a symbol, so complete on it. */
3766 sym_text
= quote_pos
+ 1;
3767 else if (quote_found
== '"')
3768 /* A double-quoted string is never a symbol, nor does it make sense
3769 to complete it any other way. */
3771 return_val
= (char **) xmalloc (sizeof (char *));
3772 return_val
[0] = NULL
;
3777 /* It is not a quoted string. Break it based on the characters
3778 which are in symbols. */
3781 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
3782 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
3791 sym_text_len
= strlen (sym_text
);
3793 return_val_size
= 100;
3794 return_val_index
= 0;
3795 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3796 return_val
[0] = NULL
;
3798 datum
.sym_text
= sym_text
;
3799 datum
.sym_text_len
= sym_text_len
;
3803 /* Look through the partial symtabs for all symbols which begin
3804 by matching SYM_TEXT. Expand all CUs that you find to the list.
3805 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
3806 expand_partial_symbol_names (expand_partial_symbol_name
, &datum
);
3808 /* At this point scan through the misc symbol vectors and add each
3809 symbol you find to the list. Eventually we want to ignore
3810 anything that isn't a text symbol (everything else will be
3811 handled by the psymtab code above). */
3813 ALL_MSYMBOLS (objfile
, msymbol
)
3816 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3818 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3821 /* Search upwards from currently selected frame (so that we can
3822 complete on local vars). Also catch fields of types defined in
3823 this places which match our text string. Only complete on types
3824 visible from current context. */
3826 b
= get_selected_block (0);
3827 surrounding_static_block
= block_static_block (b
);
3828 surrounding_global_block
= block_global_block (b
);
3829 if (surrounding_static_block
!= NULL
)
3830 while (b
!= surrounding_static_block
)
3834 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3836 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
3838 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
3842 /* Stop when we encounter an enclosing function. Do not stop for
3843 non-inlined functions - the locals of the enclosing function
3844 are in scope for a nested function. */
3845 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3847 b
= BLOCK_SUPERBLOCK (b
);
3850 /* Add fields from the file's types; symbols will be added below. */
3852 if (surrounding_static_block
!= NULL
)
3853 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
3854 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3856 if (surrounding_global_block
!= NULL
)
3857 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
3858 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3860 /* Go through the symtabs and check the externs and statics for
3861 symbols which match. */
3863 ALL_PRIMARY_SYMTABS (objfile
, s
)
3866 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3867 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3869 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3873 ALL_PRIMARY_SYMTABS (objfile
, s
)
3876 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3877 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3879 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3883 if (current_language
->la_macro_expansion
== macro_expansion_c
)
3885 struct macro_scope
*scope
;
3887 /* Add any macros visible in the default scope. Note that this
3888 may yield the occasional wrong result, because an expression
3889 might be evaluated in a scope other than the default. For
3890 example, if the user types "break file:line if <TAB>", the
3891 resulting expression will be evaluated at "file:line" -- but
3892 at there does not seem to be a way to detect this at
3894 scope
= default_macro_scope ();
3897 macro_for_each_in_scope (scope
->file
, scope
->line
,
3898 add_macro_name
, &datum
);
3902 /* User-defined macros are always visible. */
3903 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
3906 return (return_val
);
3910 default_make_symbol_completion_list (char *text
, char *word
)
3912 return default_make_symbol_completion_list_break_on (text
, word
, "");
3915 /* Return a NULL terminated array of all symbols (regardless of class)
3916 which begin by matching TEXT. If the answer is no symbols, then
3917 the return value is an array which contains only a NULL pointer. */
3920 make_symbol_completion_list (char *text
, char *word
)
3922 return current_language
->la_make_symbol_completion_list (text
, word
);
3925 /* Like make_symbol_completion_list, but suitable for use as a
3926 completion function. */
3929 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
3930 char *text
, char *word
)
3932 return make_symbol_completion_list (text
, word
);
3935 /* Like make_symbol_completion_list, but returns a list of symbols
3936 defined in a source file FILE. */
3939 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3944 struct dict_iterator iter
;
3945 /* The symbol we are completing on. Points in same buffer as text. */
3947 /* Length of sym_text. */
3950 /* Now look for the symbol we are supposed to complete on.
3951 FIXME: This should be language-specific. */
3955 char *quote_pos
= NULL
;
3957 /* First see if this is a quoted string. */
3959 for (p
= text
; *p
!= '\0'; ++p
)
3961 if (quote_found
!= '\0')
3963 if (*p
== quote_found
)
3964 /* Found close quote. */
3966 else if (*p
== '\\' && p
[1] == quote_found
)
3967 /* A backslash followed by the quote character
3968 doesn't end the string. */
3971 else if (*p
== '\'' || *p
== '"')
3977 if (quote_found
== '\'')
3978 /* A string within single quotes can be a symbol, so complete on it. */
3979 sym_text
= quote_pos
+ 1;
3980 else if (quote_found
== '"')
3981 /* A double-quoted string is never a symbol, nor does it make sense
3982 to complete it any other way. */
3984 return_val
= (char **) xmalloc (sizeof (char *));
3985 return_val
[0] = NULL
;
3990 /* Not a quoted string. */
3991 sym_text
= language_search_unquoted_string (text
, p
);
3995 sym_text_len
= strlen (sym_text
);
3997 return_val_size
= 10;
3998 return_val_index
= 0;
3999 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
4000 return_val
[0] = NULL
;
4002 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4004 s
= lookup_symtab (srcfile
);
4007 /* Maybe they typed the file with leading directories, while the
4008 symbol tables record only its basename. */
4009 const char *tail
= lbasename (srcfile
);
4012 s
= lookup_symtab (tail
);
4015 /* If we have no symtab for that file, return an empty list. */
4017 return (return_val
);
4019 /* Go through this symtab and check the externs and statics for
4020 symbols which match. */
4022 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4023 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4025 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4028 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4029 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4031 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4034 return (return_val
);
4037 /* A helper function for make_source_files_completion_list. It adds
4038 another file name to a list of possible completions, growing the
4039 list as necessary. */
4042 add_filename_to_list (const char *fname
, char *text
, char *word
,
4043 char ***list
, int *list_used
, int *list_alloced
)
4046 size_t fnlen
= strlen (fname
);
4048 if (*list_used
+ 1 >= *list_alloced
)
4051 *list
= (char **) xrealloc ((char *) *list
,
4052 *list_alloced
* sizeof (char *));
4057 /* Return exactly fname. */
4058 new = xmalloc (fnlen
+ 5);
4059 strcpy (new, fname
);
4061 else if (word
> text
)
4063 /* Return some portion of fname. */
4064 new = xmalloc (fnlen
+ 5);
4065 strcpy (new, fname
+ (word
- text
));
4069 /* Return some of TEXT plus fname. */
4070 new = xmalloc (fnlen
+ (text
- word
) + 5);
4071 strncpy (new, word
, text
- word
);
4072 new[text
- word
] = '\0';
4073 strcat (new, fname
);
4075 (*list
)[*list_used
] = new;
4076 (*list
)[++*list_used
] = NULL
;
4080 not_interesting_fname (const char *fname
)
4082 static const char *illegal_aliens
[] = {
4083 "_globals_", /* inserted by coff_symtab_read */
4088 for (i
= 0; illegal_aliens
[i
]; i
++)
4090 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4096 /* An object of this type is passed as the user_data argument to
4097 map_partial_symbol_filenames. */
4098 struct add_partial_filename_data
4109 /* A callback for map_partial_symbol_filenames. */
4111 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4114 struct add_partial_filename_data
*data
= user_data
;
4116 if (not_interesting_fname (filename
))
4118 if (!filename_seen (filename
, 1, data
->first
)
4119 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4121 /* This file matches for a completion; add it to the
4122 current list of matches. */
4123 add_filename_to_list (filename
, data
->text
, data
->word
,
4124 data
->list
, data
->list_used
, data
->list_alloced
);
4128 const char *base_name
= lbasename (filename
);
4130 if (base_name
!= filename
4131 && !filename_seen (base_name
, 1, data
->first
)
4132 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4133 add_filename_to_list (base_name
, data
->text
, data
->word
,
4134 data
->list
, data
->list_used
, data
->list_alloced
);
4138 /* Return a NULL terminated array of all source files whose names
4139 begin with matching TEXT. The file names are looked up in the
4140 symbol tables of this program. If the answer is no matchess, then
4141 the return value is an array which contains only a NULL pointer. */
4144 make_source_files_completion_list (char *text
, char *word
)
4147 struct objfile
*objfile
;
4149 int list_alloced
= 1;
4151 size_t text_len
= strlen (text
);
4152 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4153 const char *base_name
;
4154 struct add_partial_filename_data datum
;
4158 if (!have_full_symbols () && !have_partial_symbols ())
4161 ALL_SYMTABS (objfile
, s
)
4163 if (not_interesting_fname (s
->filename
))
4165 if (!filename_seen (s
->filename
, 1, &first
)
4166 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4168 /* This file matches for a completion; add it to the current
4170 add_filename_to_list (s
->filename
, text
, word
,
4171 &list
, &list_used
, &list_alloced
);
4175 /* NOTE: We allow the user to type a base name when the
4176 debug info records leading directories, but not the other
4177 way around. This is what subroutines of breakpoint
4178 command do when they parse file names. */
4179 base_name
= lbasename (s
->filename
);
4180 if (base_name
!= s
->filename
4181 && !filename_seen (base_name
, 1, &first
)
4182 && filename_ncmp (base_name
, text
, text_len
) == 0)
4183 add_filename_to_list (base_name
, text
, word
,
4184 &list
, &list_used
, &list_alloced
);
4188 datum
.first
= &first
;
4191 datum
.text_len
= text_len
;
4193 datum
.list_used
= &list_used
;
4194 datum
.list_alloced
= &list_alloced
;
4195 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
);
4200 /* Determine if PC is in the prologue of a function. The prologue is the area
4201 between the first instruction of a function, and the first executable line.
4202 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4204 If non-zero, func_start is where we think the prologue starts, possibly
4205 by previous examination of symbol table information. */
4208 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4210 struct symtab_and_line sal
;
4211 CORE_ADDR func_addr
, func_end
;
4213 /* We have several sources of information we can consult to figure
4215 - Compilers usually emit line number info that marks the prologue
4216 as its own "source line". So the ending address of that "line"
4217 is the end of the prologue. If available, this is the most
4219 - The minimal symbols and partial symbols, which can usually tell
4220 us the starting and ending addresses of a function.
4221 - If we know the function's start address, we can call the
4222 architecture-defined gdbarch_skip_prologue function to analyze the
4223 instruction stream and guess where the prologue ends.
4224 - Our `func_start' argument; if non-zero, this is the caller's
4225 best guess as to the function's entry point. At the time of
4226 this writing, handle_inferior_event doesn't get this right, so
4227 it should be our last resort. */
4229 /* Consult the partial symbol table, to find which function
4231 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4233 CORE_ADDR prologue_end
;
4235 /* We don't even have minsym information, so fall back to using
4236 func_start, if given. */
4238 return 1; /* We *might* be in a prologue. */
4240 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4242 return func_start
<= pc
&& pc
< prologue_end
;
4245 /* If we have line number information for the function, that's
4246 usually pretty reliable. */
4247 sal
= find_pc_line (func_addr
, 0);
4249 /* Now sal describes the source line at the function's entry point,
4250 which (by convention) is the prologue. The end of that "line",
4251 sal.end, is the end of the prologue.
4253 Note that, for functions whose source code is all on a single
4254 line, the line number information doesn't always end up this way.
4255 So we must verify that our purported end-of-prologue address is
4256 *within* the function, not at its start or end. */
4258 || sal
.end
<= func_addr
4259 || func_end
<= sal
.end
)
4261 /* We don't have any good line number info, so use the minsym
4262 information, together with the architecture-specific prologue
4264 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4266 return func_addr
<= pc
&& pc
< prologue_end
;
4269 /* We have line number info, and it looks good. */
4270 return func_addr
<= pc
&& pc
< sal
.end
;
4273 /* Given PC at the function's start address, attempt to find the
4274 prologue end using SAL information. Return zero if the skip fails.
4276 A non-optimized prologue traditionally has one SAL for the function
4277 and a second for the function body. A single line function has
4278 them both pointing at the same line.
4280 An optimized prologue is similar but the prologue may contain
4281 instructions (SALs) from the instruction body. Need to skip those
4282 while not getting into the function body.
4284 The functions end point and an increasing SAL line are used as
4285 indicators of the prologue's endpoint.
4287 This code is based on the function refine_prologue_limit (versions
4288 found in both ia64 and ppc). */
4291 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4293 struct symtab_and_line prologue_sal
;
4298 /* Get an initial range for the function. */
4299 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4300 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4302 prologue_sal
= find_pc_line (start_pc
, 0);
4303 if (prologue_sal
.line
!= 0)
4305 /* For langauges other than assembly, treat two consecutive line
4306 entries at the same address as a zero-instruction prologue.
4307 The GNU assembler emits separate line notes for each instruction
4308 in a multi-instruction macro, but compilers generally will not
4310 if (prologue_sal
.symtab
->language
!= language_asm
)
4312 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4315 /* Skip any earlier lines, and any end-of-sequence marker
4316 from a previous function. */
4317 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4318 || linetable
->item
[idx
].line
== 0)
4321 if (idx
+1 < linetable
->nitems
4322 && linetable
->item
[idx
+1].line
!= 0
4323 && linetable
->item
[idx
+1].pc
== start_pc
)
4327 /* If there is only one sal that covers the entire function,
4328 then it is probably a single line function, like
4330 if (prologue_sal
.end
>= end_pc
)
4333 while (prologue_sal
.end
< end_pc
)
4335 struct symtab_and_line sal
;
4337 sal
= find_pc_line (prologue_sal
.end
, 0);
4340 /* Assume that a consecutive SAL for the same (or larger)
4341 line mark the prologue -> body transition. */
4342 if (sal
.line
>= prologue_sal
.line
)
4345 /* The line number is smaller. Check that it's from the
4346 same function, not something inlined. If it's inlined,
4347 then there is no point comparing the line numbers. */
4348 bl
= block_for_pc (prologue_sal
.end
);
4351 if (block_inlined_p (bl
))
4353 if (BLOCK_FUNCTION (bl
))
4358 bl
= BLOCK_SUPERBLOCK (bl
);
4363 /* The case in which compiler's optimizer/scheduler has
4364 moved instructions into the prologue. We look ahead in
4365 the function looking for address ranges whose
4366 corresponding line number is less the first one that we
4367 found for the function. This is more conservative then
4368 refine_prologue_limit which scans a large number of SALs
4369 looking for any in the prologue. */
4374 if (prologue_sal
.end
< end_pc
)
4375 /* Return the end of this line, or zero if we could not find a
4377 return prologue_sal
.end
;
4379 /* Don't return END_PC, which is past the end of the function. */
4380 return prologue_sal
.pc
;
4383 struct symtabs_and_lines
4384 decode_line_spec (char *string
, int funfirstline
)
4386 struct symtabs_and_lines sals
;
4387 struct symtab_and_line cursal
;
4390 error (_("Empty line specification."));
4392 /* We use whatever is set as the current source line. We do not try
4393 and get a default or it will recursively call us! */
4394 cursal
= get_current_source_symtab_and_line ();
4396 sals
= decode_line_1 (&string
, funfirstline
,
4397 cursal
.symtab
, cursal
.line
,
4401 error (_("Junk at end of line specification: %s"), string
);
4406 static char *name_of_main
;
4407 enum language language_of_main
= language_unknown
;
4410 set_main_name (const char *name
)
4412 if (name_of_main
!= NULL
)
4414 xfree (name_of_main
);
4415 name_of_main
= NULL
;
4416 language_of_main
= language_unknown
;
4420 name_of_main
= xstrdup (name
);
4421 language_of_main
= language_unknown
;
4425 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4429 find_main_name (void)
4431 const char *new_main_name
;
4433 /* Try to see if the main procedure is in Ada. */
4434 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4435 be to add a new method in the language vector, and call this
4436 method for each language until one of them returns a non-empty
4437 name. This would allow us to remove this hard-coded call to
4438 an Ada function. It is not clear that this is a better approach
4439 at this point, because all methods need to be written in a way
4440 such that false positives never be returned. For instance, it is
4441 important that a method does not return a wrong name for the main
4442 procedure if the main procedure is actually written in a different
4443 language. It is easy to guaranty this with Ada, since we use a
4444 special symbol generated only when the main in Ada to find the name
4445 of the main procedure. It is difficult however to see how this can
4446 be guarantied for languages such as C, for instance. This suggests
4447 that order of call for these methods becomes important, which means
4448 a more complicated approach. */
4449 new_main_name
= ada_main_name ();
4450 if (new_main_name
!= NULL
)
4452 set_main_name (new_main_name
);
4456 new_main_name
= pascal_main_name ();
4457 if (new_main_name
!= NULL
)
4459 set_main_name (new_main_name
);
4463 /* The languages above didn't identify the name of the main procedure.
4464 Fallback to "main". */
4465 set_main_name ("main");
4471 if (name_of_main
== NULL
)
4474 return name_of_main
;
4477 /* Handle ``executable_changed'' events for the symtab module. */
4480 symtab_observer_executable_changed (void)
4482 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4483 set_main_name (NULL
);
4486 /* Helper to expand_line_sal below. Appends new sal to SAL,
4487 initializing it from SYMTAB, LINENO and PC. */
4489 append_expanded_sal (struct symtabs_and_lines
*sal
,
4490 struct program_space
*pspace
,
4491 struct symtab
*symtab
,
4492 int lineno
, CORE_ADDR pc
)
4494 sal
->sals
= xrealloc (sal
->sals
,
4495 sizeof (sal
->sals
[0])
4496 * (sal
->nelts
+ 1));
4497 init_sal (sal
->sals
+ sal
->nelts
);
4498 sal
->sals
[sal
->nelts
].pspace
= pspace
;
4499 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4500 sal
->sals
[sal
->nelts
].section
= NULL
;
4501 sal
->sals
[sal
->nelts
].end
= 0;
4502 sal
->sals
[sal
->nelts
].line
= lineno
;
4503 sal
->sals
[sal
->nelts
].pc
= pc
;
4507 /* Helper to expand_line_sal below. Search in the symtabs for any
4508 linetable entry that exactly matches FULLNAME and LINENO and append
4509 them to RET. If FULLNAME is NULL or if a symtab has no full name,
4510 use FILENAME and LINENO instead. If there is at least one match,
4511 return 1; otherwise, return 0, and return the best choice in BEST_ITEM
4515 append_exact_match_to_sals (char *filename
, char *fullname
, int lineno
,
4516 struct symtabs_and_lines
*ret
,
4517 struct linetable_entry
**best_item
,
4518 struct symtab
**best_symtab
)
4520 struct program_space
*pspace
;
4521 struct objfile
*objfile
;
4522 struct symtab
*symtab
;
4528 ALL_PSPACES (pspace
)
4529 ALL_PSPACE_SYMTABS (pspace
, objfile
, symtab
)
4531 if (FILENAME_CMP (filename
, symtab
->filename
) == 0)
4533 struct linetable
*l
;
4536 if (fullname
!= NULL
4537 && symtab_to_fullname (symtab
) != NULL
4538 && FILENAME_CMP (fullname
, symtab
->fullname
) != 0)
4540 l
= LINETABLE (symtab
);
4545 for (j
= 0; j
< len
; j
++)
4547 struct linetable_entry
*item
= &(l
->item
[j
]);
4549 if (item
->line
== lineno
)
4552 append_expanded_sal (ret
, objfile
->pspace
,
4553 symtab
, lineno
, item
->pc
);
4555 else if (!exact
&& item
->line
> lineno
4556 && (*best_item
== NULL
4557 || item
->line
< (*best_item
)->line
))
4560 *best_symtab
= symtab
;
4568 /* Compute a set of all sals in all program spaces that correspond to
4569 same file and line as SAL and return those. If there are several
4570 sals that belong to the same block, only one sal for the block is
4571 included in results. */
4573 struct symtabs_and_lines
4574 expand_line_sal (struct symtab_and_line sal
)
4576 struct symtabs_and_lines ret
;
4578 struct objfile
*objfile
;
4581 struct block
**blocks
= NULL
;
4583 struct cleanup
*old_chain
;
4588 /* Only expand sals that represent file.c:line. */
4589 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4591 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4598 struct program_space
*pspace
;
4599 struct linetable_entry
*best_item
= 0;
4600 struct symtab
*best_symtab
= 0;
4602 char *match_filename
;
4605 match_filename
= sal
.symtab
->filename
;
4607 /* We need to find all symtabs for a file which name
4608 is described by sal. We cannot just directly
4609 iterate over symtabs, since a symtab might not be
4610 yet created. We also cannot iterate over psymtabs,
4611 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4612 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4613 corresponding to an included file. Therefore, we do
4614 first pass over psymtabs, reading in those with
4615 the right name. Then, we iterate over symtabs, knowing
4616 that all symtabs we're interested in are loaded. */
4618 old_chain
= save_current_program_space ();
4619 ALL_PSPACES (pspace
)
4621 set_current_program_space (pspace
);
4622 ALL_PSPACE_OBJFILES (pspace
, objfile
)
4625 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
4626 sal
.symtab
->filename
);
4629 do_cleanups (old_chain
);
4631 /* Now search the symtab for exact matches and append them. If
4632 none is found, append the best_item and all its exact
4634 symtab_to_fullname (sal
.symtab
);
4635 exact
= append_exact_match_to_sals (sal
.symtab
->filename
,
4636 sal
.symtab
->fullname
, lineno
,
4637 &ret
, &best_item
, &best_symtab
);
4638 if (!exact
&& best_item
)
4639 append_exact_match_to_sals (best_symtab
->filename
,
4640 best_symtab
->fullname
, best_item
->line
,
4641 &ret
, &best_item
, &best_symtab
);
4644 /* For optimized code, compiler can scatter one source line accross
4645 disjoint ranges of PC values, even when no duplicate functions
4646 or inline functions are involved. For example, 'for (;;)' inside
4647 non-template non-inline non-ctor-or-dtor function can result
4648 in two PC ranges. In this case, we don't want to set breakpoint
4649 on first PC of each range. To filter such cases, we use containing
4650 blocks -- for each PC found above we see if there are other PCs
4651 that are in the same block. If yes, the other PCs are filtered out. */
4653 old_chain
= save_current_program_space ();
4654 filter
= alloca (ret
.nelts
* sizeof (int));
4655 blocks
= alloca (ret
.nelts
* sizeof (struct block
*));
4656 for (i
= 0; i
< ret
.nelts
; ++i
)
4658 set_current_program_space (ret
.sals
[i
].pspace
);
4661 blocks
[i
] = block_for_pc_sect (ret
.sals
[i
].pc
, ret
.sals
[i
].section
);
4664 do_cleanups (old_chain
);
4666 for (i
= 0; i
< ret
.nelts
; ++i
)
4667 if (blocks
[i
] != NULL
)
4668 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4669 if (blocks
[j
] == blocks
[i
])
4677 struct symtab_and_line
*final
=
4678 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4680 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4682 final
[j
++] = ret
.sals
[i
];
4684 ret
.nelts
-= deleted
;
4692 /* Return 1 if the supplied producer string matches the ARM RealView
4693 compiler (armcc). */
4696 producer_is_realview (const char *producer
)
4698 static const char *const arm_idents
[] = {
4699 "ARM C Compiler, ADS",
4700 "Thumb C Compiler, ADS",
4701 "ARM C++ Compiler, ADS",
4702 "Thumb C++ Compiler, ADS",
4703 "ARM/Thumb C/C++ Compiler, RVCT",
4704 "ARM C/C++ Compiler, RVCT"
4708 if (producer
== NULL
)
4711 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4712 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4719 _initialize_symtab (void)
4721 add_info ("variables", variables_info
, _("\
4722 All global and static variable names, or those matching REGEXP."));
4724 add_com ("whereis", class_info
, variables_info
, _("\
4725 All global and static variable names, or those matching REGEXP."));
4727 add_info ("functions", functions_info
,
4728 _("All function names, or those matching REGEXP."));
4730 /* FIXME: This command has at least the following problems:
4731 1. It prints builtin types (in a very strange and confusing fashion).
4732 2. It doesn't print right, e.g. with
4733 typedef struct foo *FOO
4734 type_print prints "FOO" when we want to make it (in this situation)
4735 print "struct foo *".
4736 I also think "ptype" or "whatis" is more likely to be useful (but if
4737 there is much disagreement "info types" can be fixed). */
4738 add_info ("types", types_info
,
4739 _("All type names, or those matching REGEXP."));
4741 add_info ("sources", sources_info
,
4742 _("Source files in the program."));
4744 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4745 _("Set a breakpoint for all functions matching REGEXP."));
4749 add_com ("lf", class_info
, sources_info
,
4750 _("Source files in the program"));
4751 add_com ("lg", class_info
, variables_info
, _("\
4752 All global and static variable names, or those matching REGEXP."));
4755 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4756 multiple_symbols_modes
, &multiple_symbols_mode
,
4758 Set the debugger behavior when more than one symbol are possible matches\n\
4759 in an expression."), _("\
4760 Show how the debugger handles ambiguities in expressions."), _("\
4761 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4762 NULL
, NULL
, &setlist
, &showlist
);
4764 observer_attach_executable_changed (symtab_observer_executable_changed
);