1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,
5 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "call-cmds.h"
33 #include "gdb_regex.h"
34 #include "expression.h"
40 #include "filenames.h" /* for FILENAME_CMP */
41 #include "objc-lang.h"
49 #include "gdb_obstack.h"
51 #include "dictionary.h"
53 #include <sys/types.h>
55 #include "gdb_string.h"
59 #include "cp-support.h"
61 #include "gdb_assert.h"
64 #include "macroscope.h"
68 /* Prototypes for local functions */
70 static void completion_list_add_name (char *, char *, int, char *, char *);
72 static void rbreak_command (char *, int);
74 static void types_info (char *, int);
76 static void functions_info (char *, int);
78 static void variables_info (char *, int);
80 static void sources_info (char *, int);
82 static void output_source_filename (const char *, int *);
84 static int find_line_common (struct linetable
*, int, int *);
86 /* This one is used by linespec.c */
88 char *operator_chars (char *p
, char **end
);
90 static struct symbol
*lookup_symbol_aux (const char *name
,
91 const struct block
*block
,
92 const domain_enum domain
,
93 enum language language
,
94 int *is_a_field_of_this
);
97 struct symbol
*lookup_symbol_aux_local (const char *name
,
98 const struct block
*block
,
99 const domain_enum domain
,
100 enum language language
);
103 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
105 const domain_enum domain
);
108 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
111 const domain_enum domain
);
113 static void print_symbol_info (domain_enum
,
114 struct symtab
*, struct symbol
*, int, char *);
116 static void print_msymbol_info (struct minimal_symbol
*);
118 static void symtab_symbol_info (char *, domain_enum
, int);
120 void _initialize_symtab (void);
124 /* Allow the user to configure the debugger behavior with respect
125 to multiple-choice menus when more than one symbol matches during
128 const char multiple_symbols_ask
[] = "ask";
129 const char multiple_symbols_all
[] = "all";
130 const char multiple_symbols_cancel
[] = "cancel";
131 static const char *multiple_symbols_modes
[] =
133 multiple_symbols_ask
,
134 multiple_symbols_all
,
135 multiple_symbols_cancel
,
138 static const char *multiple_symbols_mode
= multiple_symbols_all
;
140 /* Read-only accessor to AUTO_SELECT_MODE. */
143 multiple_symbols_select_mode (void)
145 return multiple_symbols_mode
;
148 /* Block in which the most recently searched-for symbol was found.
149 Might be better to make this a parameter to lookup_symbol and
152 const struct block
*block_found
;
154 /* Check for a symtab of a specific name; first in symtabs, then in
155 psymtabs. *If* there is no '/' in the name, a match after a '/'
156 in the symtab filename will also work. */
159 lookup_symtab (const char *name
)
162 struct symtab
*s
= NULL
;
163 struct objfile
*objfile
;
164 char *real_path
= NULL
;
165 char *full_path
= NULL
;
167 /* Here we are interested in canonicalizing an absolute path, not
168 absolutizing a relative path. */
169 if (IS_ABSOLUTE_PATH (name
))
171 full_path
= xfullpath (name
);
172 make_cleanup (xfree
, full_path
);
173 real_path
= gdb_realpath (name
);
174 make_cleanup (xfree
, real_path
);
179 /* First, search for an exact match */
181 ALL_SYMTABS (objfile
, s
)
183 if (FILENAME_CMP (name
, s
->filename
) == 0)
188 /* If the user gave us an absolute path, try to find the file in
189 this symtab and use its absolute path. */
191 if (full_path
!= NULL
)
193 const char *fp
= symtab_to_fullname (s
);
195 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
201 if (real_path
!= NULL
)
203 char *fullname
= symtab_to_fullname (s
);
205 if (fullname
!= NULL
)
207 char *rp
= gdb_realpath (fullname
);
209 make_cleanup (xfree
, rp
);
210 if (FILENAME_CMP (real_path
, rp
) == 0)
218 /* Now, search for a matching tail (only if name doesn't have any dirs) */
220 if (lbasename (name
) == name
)
221 ALL_SYMTABS (objfile
, s
)
223 if (FILENAME_CMP (lbasename (s
->filename
), name
) == 0)
227 /* Same search rules as above apply here, but now we look thru the
231 ALL_OBJFILES (objfile
)
234 && objfile
->sf
->qf
->lookup_symtab (objfile
, name
, full_path
, real_path
,
247 /* At this point, we have located the psymtab for this file, but
248 the conversion to a symtab has failed. This usually happens
249 when we are looking up an include file. In this case,
250 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
251 been created. So, we need to run through the symtabs again in
252 order to find the file.
253 XXX - This is a crock, and should be fixed inside of the the
254 symbol parsing routines. */
258 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
259 full method name, which consist of the class name (from T), the unadorned
260 method name from METHOD_ID, and the signature for the specific overload,
261 specified by SIGNATURE_ID. Note that this function is g++ specific. */
264 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
266 int mangled_name_len
;
268 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
269 struct fn_field
*method
= &f
[signature_id
];
270 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
271 char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
272 char *newname
= type_name_no_tag (type
);
274 /* Does the form of physname indicate that it is the full mangled name
275 of a constructor (not just the args)? */
276 int is_full_physname_constructor
;
279 int is_destructor
= is_destructor_name (physname
);
280 /* Need a new type prefix. */
281 char *const_prefix
= method
->is_const
? "C" : "";
282 char *volatile_prefix
= method
->is_volatile
? "V" : "";
284 int len
= (newname
== NULL
? 0 : strlen (newname
));
286 /* Nothing to do if physname already contains a fully mangled v3 abi name
287 or an operator name. */
288 if ((physname
[0] == '_' && physname
[1] == 'Z')
289 || is_operator_name (field_name
))
290 return xstrdup (physname
);
292 is_full_physname_constructor
= is_constructor_name (physname
);
295 is_full_physname_constructor
|| (newname
&& strcmp (field_name
, newname
) == 0);
298 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
300 if (is_destructor
|| is_full_physname_constructor
)
302 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
303 strcpy (mangled_name
, physname
);
309 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
311 else if (physname
[0] == 't' || physname
[0] == 'Q')
313 /* The physname for template and qualified methods already includes
315 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
321 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
323 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
324 + strlen (buf
) + len
+ strlen (physname
) + 1);
326 mangled_name
= (char *) xmalloc (mangled_name_len
);
328 mangled_name
[0] = '\0';
330 strcpy (mangled_name
, field_name
);
332 strcat (mangled_name
, buf
);
333 /* If the class doesn't have a name, i.e. newname NULL, then we just
334 mangle it using 0 for the length of the class. Thus it gets mangled
335 as something starting with `::' rather than `classname::'. */
337 strcat (mangled_name
, newname
);
339 strcat (mangled_name
, physname
);
340 return (mangled_name
);
343 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
344 correctly allocated. */
346 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
349 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
352 /* Return the demangled name of GSYMBOL. */
354 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
356 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
360 /* Initialize the language dependent portion of a symbol
361 depending upon the language for the symbol. */
363 symbol_init_language_specific (struct general_symbol_info
*gsymbol
,
364 enum language language
)
366 gsymbol
->language
= language
;
367 if (gsymbol
->language
== language_cplus
368 || gsymbol
->language
== language_d
369 || gsymbol
->language
== language_java
370 || gsymbol
->language
== language_objc
371 || gsymbol
->language
== language_fortran
)
373 symbol_set_demangled_name (gsymbol
, NULL
);
377 memset (&gsymbol
->language_specific
, 0,
378 sizeof (gsymbol
->language_specific
));
382 /* Functions to initialize a symbol's mangled name. */
384 /* Objects of this type are stored in the demangled name hash table. */
385 struct demangled_name_entry
391 /* Hash function for the demangled name hash. */
393 hash_demangled_name_entry (const void *data
)
395 const struct demangled_name_entry
*e
= data
;
397 return htab_hash_string (e
->mangled
);
400 /* Equality function for the demangled name hash. */
402 eq_demangled_name_entry (const void *a
, const void *b
)
404 const struct demangled_name_entry
*da
= a
;
405 const struct demangled_name_entry
*db
= b
;
407 return strcmp (da
->mangled
, db
->mangled
) == 0;
410 /* Create the hash table used for demangled names. Each hash entry is
411 a pair of strings; one for the mangled name and one for the demangled
412 name. The entry is hashed via just the mangled name. */
415 create_demangled_names_hash (struct objfile
*objfile
)
417 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
418 The hash table code will round this up to the next prime number.
419 Choosing a much larger table size wastes memory, and saves only about
420 1% in symbol reading. */
422 objfile
->demangled_names_hash
= htab_create_alloc
423 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
424 NULL
, xcalloc
, xfree
);
427 /* Try to determine the demangled name for a symbol, based on the
428 language of that symbol. If the language is set to language_auto,
429 it will attempt to find any demangling algorithm that works and
430 then set the language appropriately. The returned name is allocated
431 by the demangler and should be xfree'd. */
434 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
437 char *demangled
= NULL
;
439 if (gsymbol
->language
== language_unknown
)
440 gsymbol
->language
= language_auto
;
442 if (gsymbol
->language
== language_objc
443 || gsymbol
->language
== language_auto
)
446 objc_demangle (mangled
, 0);
447 if (demangled
!= NULL
)
449 gsymbol
->language
= language_objc
;
453 if (gsymbol
->language
== language_cplus
454 || gsymbol
->language
== language_auto
)
457 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
| DMGL_VERBOSE
);
458 if (demangled
!= NULL
)
460 gsymbol
->language
= language_cplus
;
464 if (gsymbol
->language
== language_java
)
467 cplus_demangle (mangled
,
468 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
469 if (demangled
!= NULL
)
471 gsymbol
->language
= language_java
;
475 if (gsymbol
->language
== language_d
476 || gsymbol
->language
== language_auto
)
478 demangled
= d_demangle(mangled
, 0);
479 if (demangled
!= NULL
)
481 gsymbol
->language
= language_d
;
485 /* We could support `gsymbol->language == language_fortran' here to provide
486 module namespaces also for inferiors with only minimal symbol table (ELF
487 symbols). Just the mangling standard is not standardized across compilers
488 and there is no DW_AT_producer available for inferiors with only the ELF
489 symbols to check the mangling kind. */
493 /* Set both the mangled and demangled (if any) names for GSYMBOL based
494 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
495 objfile's obstack; but if COPY_NAME is 0 and if NAME is
496 NUL-terminated, then this function assumes that NAME is already
497 correctly saved (either permanently or with a lifetime tied to the
498 objfile), and it will not be copied.
500 The hash table corresponding to OBJFILE is used, and the memory
501 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
502 so the pointer can be discarded after calling this function. */
504 /* We have to be careful when dealing with Java names: when we run
505 into a Java minimal symbol, we don't know it's a Java symbol, so it
506 gets demangled as a C++ name. This is unfortunate, but there's not
507 much we can do about it: but when demangling partial symbols and
508 regular symbols, we'd better not reuse the wrong demangled name.
509 (See PR gdb/1039.) We solve this by putting a distinctive prefix
510 on Java names when storing them in the hash table. */
512 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
513 don't mind the Java prefix so much: different languages have
514 different demangling requirements, so it's only natural that we
515 need to keep language data around in our demangling cache. But
516 it's not good that the minimal symbol has the wrong demangled name.
517 Unfortunately, I can't think of any easy solution to that
520 #define JAVA_PREFIX "##JAVA$$"
521 #define JAVA_PREFIX_LEN 8
524 symbol_set_names (struct general_symbol_info
*gsymbol
,
525 const char *linkage_name
, int len
, int copy_name
,
526 struct objfile
*objfile
)
528 struct demangled_name_entry
**slot
;
529 /* A 0-terminated copy of the linkage name. */
530 const char *linkage_name_copy
;
531 /* A copy of the linkage name that might have a special Java prefix
532 added to it, for use when looking names up in the hash table. */
533 const char *lookup_name
;
534 /* The length of lookup_name. */
536 struct demangled_name_entry entry
;
538 if (gsymbol
->language
== language_ada
)
540 /* In Ada, we do the symbol lookups using the mangled name, so
541 we can save some space by not storing the demangled name.
543 As a side note, we have also observed some overlap between
544 the C++ mangling and Ada mangling, similarly to what has
545 been observed with Java. Because we don't store the demangled
546 name with the symbol, we don't need to use the same trick
549 gsymbol
->name
= (char *) linkage_name
;
552 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
553 memcpy (gsymbol
->name
, linkage_name
, len
);
554 gsymbol
->name
[len
] = '\0';
556 symbol_set_demangled_name (gsymbol
, NULL
);
561 if (objfile
->demangled_names_hash
== NULL
)
562 create_demangled_names_hash (objfile
);
564 /* The stabs reader generally provides names that are not
565 NUL-terminated; most of the other readers don't do this, so we
566 can just use the given copy, unless we're in the Java case. */
567 if (gsymbol
->language
== language_java
)
571 lookup_len
= len
+ JAVA_PREFIX_LEN
;
572 alloc_name
= alloca (lookup_len
+ 1);
573 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
574 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
575 alloc_name
[lookup_len
] = '\0';
577 lookup_name
= alloc_name
;
578 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
580 else if (linkage_name
[len
] != '\0')
585 alloc_name
= alloca (lookup_len
+ 1);
586 memcpy (alloc_name
, linkage_name
, len
);
587 alloc_name
[lookup_len
] = '\0';
589 lookup_name
= alloc_name
;
590 linkage_name_copy
= alloc_name
;
595 lookup_name
= linkage_name
;
596 linkage_name_copy
= linkage_name
;
599 entry
.mangled
= (char *) lookup_name
;
600 slot
= ((struct demangled_name_entry
**)
601 htab_find_slot (objfile
->demangled_names_hash
,
604 /* If this name is not in the hash table, add it. */
607 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
609 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
611 /* Suppose we have demangled_name==NULL, copy_name==0, and
612 lookup_name==linkage_name. In this case, we already have the
613 mangled name saved, and we don't have a demangled name. So,
614 you might think we could save a little space by not recording
615 this in the hash table at all.
617 It turns out that it is actually important to still save such
618 an entry in the hash table, because storing this name gives
619 us better bcache hit rates for partial symbols. */
620 if (!copy_name
&& lookup_name
== linkage_name
)
622 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
623 offsetof (struct demangled_name_entry
,
625 + demangled_len
+ 1);
626 (*slot
)->mangled
= (char *) lookup_name
;
630 /* If we must copy the mangled name, put it directly after
631 the demangled name so we can have a single
633 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
634 offsetof (struct demangled_name_entry
,
636 + lookup_len
+ demangled_len
+ 2);
637 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
638 strcpy ((*slot
)->mangled
, lookup_name
);
641 if (demangled_name
!= NULL
)
643 strcpy ((*slot
)->demangled
, demangled_name
);
644 xfree (demangled_name
);
647 (*slot
)->demangled
[0] = '\0';
650 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
651 if ((*slot
)->demangled
[0] != '\0')
652 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
);
654 symbol_set_demangled_name (gsymbol
, NULL
);
657 /* Return the source code name of a symbol. In languages where
658 demangling is necessary, this is the demangled name. */
661 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
663 switch (gsymbol
->language
)
669 case language_fortran
:
670 if (symbol_get_demangled_name (gsymbol
) != NULL
)
671 return symbol_get_demangled_name (gsymbol
);
674 if (symbol_get_demangled_name (gsymbol
) != NULL
)
675 return symbol_get_demangled_name (gsymbol
);
677 return ada_decode_symbol (gsymbol
);
682 return gsymbol
->name
;
685 /* Return the demangled name for a symbol based on the language for
686 that symbol. If no demangled name exists, return NULL. */
688 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
690 switch (gsymbol
->language
)
696 case language_fortran
:
697 if (symbol_get_demangled_name (gsymbol
) != NULL
)
698 return symbol_get_demangled_name (gsymbol
);
701 if (symbol_get_demangled_name (gsymbol
) != NULL
)
702 return symbol_get_demangled_name (gsymbol
);
704 return ada_decode_symbol (gsymbol
);
712 /* Return the search name of a symbol---generally the demangled or
713 linkage name of the symbol, depending on how it will be searched for.
714 If there is no distinct demangled name, then returns the same value
715 (same pointer) as SYMBOL_LINKAGE_NAME. */
717 symbol_search_name (const struct general_symbol_info
*gsymbol
)
719 if (gsymbol
->language
== language_ada
)
720 return gsymbol
->name
;
722 return symbol_natural_name (gsymbol
);
725 /* Initialize the structure fields to zero values. */
727 init_sal (struct symtab_and_line
*sal
)
735 sal
->explicit_pc
= 0;
736 sal
->explicit_line
= 0;
740 /* Return 1 if the two sections are the same, or if they could
741 plausibly be copies of each other, one in an original object
742 file and another in a separated debug file. */
745 matching_obj_sections (struct obj_section
*obj_first
,
746 struct obj_section
*obj_second
)
748 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
749 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
752 /* If they're the same section, then they match. */
756 /* If either is NULL, give up. */
757 if (first
== NULL
|| second
== NULL
)
760 /* This doesn't apply to absolute symbols. */
761 if (first
->owner
== NULL
|| second
->owner
== NULL
)
764 /* If they're in the same object file, they must be different sections. */
765 if (first
->owner
== second
->owner
)
768 /* Check whether the two sections are potentially corresponding. They must
769 have the same size, address, and name. We can't compare section indexes,
770 which would be more reliable, because some sections may have been
772 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
775 /* In-memory addresses may start at a different offset, relativize them. */
776 if (bfd_get_section_vma (first
->owner
, first
)
777 - bfd_get_start_address (first
->owner
)
778 != bfd_get_section_vma (second
->owner
, second
)
779 - bfd_get_start_address (second
->owner
))
782 if (bfd_get_section_name (first
->owner
, first
) == NULL
783 || bfd_get_section_name (second
->owner
, second
) == NULL
784 || strcmp (bfd_get_section_name (first
->owner
, first
),
785 bfd_get_section_name (second
->owner
, second
)) != 0)
788 /* Otherwise check that they are in corresponding objfiles. */
791 if (obj
->obfd
== first
->owner
)
793 gdb_assert (obj
!= NULL
);
795 if (obj
->separate_debug_objfile
!= NULL
796 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
798 if (obj
->separate_debug_objfile_backlink
!= NULL
799 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
806 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
808 struct objfile
*objfile
;
809 struct minimal_symbol
*msymbol
;
811 /* If we know that this is not a text address, return failure. This is
812 necessary because we loop based on texthigh and textlow, which do
813 not include the data ranges. */
814 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
816 && (MSYMBOL_TYPE (msymbol
) == mst_data
817 || MSYMBOL_TYPE (msymbol
) == mst_bss
818 || MSYMBOL_TYPE (msymbol
) == mst_abs
819 || MSYMBOL_TYPE (msymbol
) == mst_file_data
820 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
823 ALL_OBJFILES (objfile
)
825 struct symtab
*result
= NULL
;
828 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
837 /* Debug symbols usually don't have section information. We need to dig that
838 out of the minimal symbols and stash that in the debug symbol. */
841 fixup_section (struct general_symbol_info
*ginfo
,
842 CORE_ADDR addr
, struct objfile
*objfile
)
844 struct minimal_symbol
*msym
;
846 /* First, check whether a minimal symbol with the same name exists
847 and points to the same address. The address check is required
848 e.g. on PowerPC64, where the minimal symbol for a function will
849 point to the function descriptor, while the debug symbol will
850 point to the actual function code. */
851 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
854 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
855 ginfo
->section
= SYMBOL_SECTION (msym
);
859 /* Static, function-local variables do appear in the linker
860 (minimal) symbols, but are frequently given names that won't
861 be found via lookup_minimal_symbol(). E.g., it has been
862 observed in frv-uclinux (ELF) executables that a static,
863 function-local variable named "foo" might appear in the
864 linker symbols as "foo.6" or "foo.3". Thus, there is no
865 point in attempting to extend the lookup-by-name mechanism to
866 handle this case due to the fact that there can be multiple
869 So, instead, search the section table when lookup by name has
870 failed. The ``addr'' and ``endaddr'' fields may have already
871 been relocated. If so, the relocation offset (i.e. the
872 ANOFFSET value) needs to be subtracted from these values when
873 performing the comparison. We unconditionally subtract it,
874 because, when no relocation has been performed, the ANOFFSET
875 value will simply be zero.
877 The address of the symbol whose section we're fixing up HAS
878 NOT BEEN adjusted (relocated) yet. It can't have been since
879 the section isn't yet known and knowing the section is
880 necessary in order to add the correct relocation value. In
881 other words, we wouldn't even be in this function (attempting
882 to compute the section) if it were already known.
884 Note that it is possible to search the minimal symbols
885 (subtracting the relocation value if necessary) to find the
886 matching minimal symbol, but this is overkill and much less
887 efficient. It is not necessary to find the matching minimal
888 symbol, only its section.
890 Note that this technique (of doing a section table search)
891 can fail when unrelocated section addresses overlap. For
892 this reason, we still attempt a lookup by name prior to doing
893 a search of the section table. */
895 struct obj_section
*s
;
897 ALL_OBJFILE_OSECTIONS (objfile
, s
)
899 int idx
= s
->the_bfd_section
->index
;
900 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
902 if (obj_section_addr (s
) - offset
<= addr
903 && addr
< obj_section_endaddr (s
) - offset
)
905 ginfo
->obj_section
= s
;
906 ginfo
->section
= idx
;
914 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
921 if (SYMBOL_OBJ_SECTION (sym
))
924 /* We either have an OBJFILE, or we can get at it from the sym's
925 symtab. Anything else is a bug. */
926 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
929 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
931 /* We should have an objfile by now. */
932 gdb_assert (objfile
);
934 switch (SYMBOL_CLASS (sym
))
938 addr
= SYMBOL_VALUE_ADDRESS (sym
);
941 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
945 /* Nothing else will be listed in the minsyms -- no use looking
950 fixup_section (&sym
->ginfo
, addr
, objfile
);
955 /* Find the definition for a specified symbol name NAME
956 in domain DOMAIN, visible from lexical block BLOCK.
957 Returns the struct symbol pointer, or zero if no symbol is found.
958 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
959 NAME is a field of the current implied argument `this'. If so set
960 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
961 BLOCK_FOUND is set to the block in which NAME is found (in the case of
962 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
964 /* This function has a bunch of loops in it and it would seem to be
965 attractive to put in some QUIT's (though I'm not really sure
966 whether it can run long enough to be really important). But there
967 are a few calls for which it would appear to be bad news to quit
968 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
969 that there is C++ code below which can error(), but that probably
970 doesn't affect these calls since they are looking for a known
971 variable and thus can probably assume it will never hit the C++
975 lookup_symbol_in_language (const char *name
, const struct block
*block
,
976 const domain_enum domain
, enum language lang
,
977 int *is_a_field_of_this
)
979 char *demangled_name
= NULL
;
980 const char *modified_name
= NULL
;
981 struct symbol
*returnval
;
982 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
984 modified_name
= name
;
986 /* If we are using C++, D, or Java, demangle the name before doing a
987 lookup, so we can always binary search. */
988 if (lang
== language_cplus
)
990 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
993 modified_name
= demangled_name
;
994 make_cleanup (xfree
, demangled_name
);
998 /* If we were given a non-mangled name, canonicalize it
999 according to the language (so far only for C++). */
1000 demangled_name
= cp_canonicalize_string (name
);
1003 modified_name
= demangled_name
;
1004 make_cleanup (xfree
, demangled_name
);
1008 else if (lang
== language_java
)
1010 demangled_name
= cplus_demangle (name
,
1011 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1014 modified_name
= demangled_name
;
1015 make_cleanup (xfree
, demangled_name
);
1018 else if (lang
== language_d
)
1020 demangled_name
= d_demangle (name
, 0);
1023 modified_name
= demangled_name
;
1024 make_cleanup (xfree
, demangled_name
);
1028 if (case_sensitivity
== case_sensitive_off
)
1033 len
= strlen (name
);
1034 copy
= (char *) alloca (len
+ 1);
1035 for (i
= 0; i
< len
; i
++)
1036 copy
[i
] = tolower (name
[i
]);
1038 modified_name
= copy
;
1041 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1042 is_a_field_of_this
);
1043 do_cleanups (cleanup
);
1048 /* Behave like lookup_symbol_in_language, but performed with the
1049 current language. */
1052 lookup_symbol (const char *name
, const struct block
*block
,
1053 domain_enum domain
, int *is_a_field_of_this
)
1055 return lookup_symbol_in_language (name
, block
, domain
,
1056 current_language
->la_language
,
1057 is_a_field_of_this
);
1060 /* Behave like lookup_symbol except that NAME is the natural name
1061 of the symbol that we're looking for and, if LINKAGE_NAME is
1062 non-NULL, ensure that the symbol's linkage name matches as
1065 static struct symbol
*
1066 lookup_symbol_aux (const char *name
, const struct block
*block
,
1067 const domain_enum domain
, enum language language
,
1068 int *is_a_field_of_this
)
1071 const struct language_defn
*langdef
;
1073 /* Make sure we do something sensible with is_a_field_of_this, since
1074 the callers that set this parameter to some non-null value will
1075 certainly use it later and expect it to be either 0 or 1.
1076 If we don't set it, the contents of is_a_field_of_this are
1078 if (is_a_field_of_this
!= NULL
)
1079 *is_a_field_of_this
= 0;
1081 /* Search specified block and its superiors. Don't search
1082 STATIC_BLOCK or GLOBAL_BLOCK. */
1084 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1088 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1089 check to see if NAME is a field of `this'. */
1091 langdef
= language_def (language
);
1093 if (langdef
->la_name_of_this
!= NULL
&& is_a_field_of_this
!= NULL
1096 struct symbol
*sym
= NULL
;
1097 const struct block
*function_block
= block
;
1099 /* 'this' is only defined in the function's block, so find the
1100 enclosing function block. */
1101 for (; function_block
&& !BLOCK_FUNCTION (function_block
);
1102 function_block
= BLOCK_SUPERBLOCK (function_block
));
1104 if (function_block
&& !dict_empty (BLOCK_DICT (function_block
)))
1105 sym
= lookup_block_symbol (function_block
, langdef
->la_name_of_this
,
1109 struct type
*t
= sym
->type
;
1111 /* I'm not really sure that type of this can ever
1112 be typedefed; just be safe. */
1114 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1115 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1116 t
= TYPE_TARGET_TYPE (t
);
1118 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1119 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1120 error (_("Internal error: `%s' is not an aggregate"),
1121 langdef
->la_name_of_this
);
1123 if (check_field (t
, name
))
1125 *is_a_field_of_this
= 1;
1131 /* Now do whatever is appropriate for LANGUAGE to look
1132 up static and global variables. */
1134 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1138 /* Now search all static file-level symbols. Not strictly correct,
1139 but more useful than an error. */
1141 return lookup_static_symbol_aux (name
, domain
);
1144 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1145 first, then check the psymtabs. If a psymtab indicates the existence of the
1146 desired name as a file-level static, then do psymtab-to-symtab conversion on
1147 the fly and return the found symbol. */
1150 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1152 struct objfile
*objfile
;
1155 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1159 ALL_OBJFILES (objfile
)
1161 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1169 /* Check to see if the symbol is defined in BLOCK or its superiors.
1170 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1172 static struct symbol
*
1173 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1174 const domain_enum domain
,
1175 enum language language
)
1178 const struct block
*static_block
= block_static_block (block
);
1179 const char *scope
= block_scope (block
);
1181 /* Check if either no block is specified or it's a global block. */
1183 if (static_block
== NULL
)
1186 while (block
!= static_block
)
1188 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1192 if (language
== language_cplus
|| language
== language_fortran
)
1194 sym
= cp_lookup_symbol_imports (scope
,
1204 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1206 block
= BLOCK_SUPERBLOCK (block
);
1209 /* We've reached the edge of the function without finding a result. */
1214 /* Look up OBJFILE to BLOCK. */
1217 lookup_objfile_from_block (const struct block
*block
)
1219 struct objfile
*obj
;
1225 block
= block_global_block (block
);
1226 /* Go through SYMTABS. */
1227 ALL_SYMTABS (obj
, s
)
1228 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1230 if (obj
->separate_debug_objfile_backlink
)
1231 obj
= obj
->separate_debug_objfile_backlink
;
1239 /* Look up a symbol in a block; if found, fixup the symbol, and set
1240 block_found appropriately. */
1243 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1244 const domain_enum domain
)
1248 sym
= lookup_block_symbol (block
, name
, domain
);
1251 block_found
= block
;
1252 return fixup_symbol_section (sym
, NULL
);
1258 /* Check all global symbols in OBJFILE in symtabs and
1262 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1264 const domain_enum domain
)
1266 const struct objfile
*objfile
;
1268 struct blockvector
*bv
;
1269 const struct block
*block
;
1272 for (objfile
= main_objfile
;
1274 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1276 /* Go through symtabs. */
1277 ALL_OBJFILE_SYMTABS (objfile
, s
)
1279 bv
= BLOCKVECTOR (s
);
1280 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1281 sym
= lookup_block_symbol (block
, name
, domain
);
1284 block_found
= block
;
1285 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1289 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1298 /* Check to see if the symbol is defined in one of the symtabs.
1299 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1300 depending on whether or not we want to search global symbols or
1303 static struct symbol
*
1304 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1305 const domain_enum domain
)
1308 struct objfile
*objfile
;
1309 struct blockvector
*bv
;
1310 const struct block
*block
;
1313 ALL_OBJFILES (objfile
)
1316 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1320 ALL_OBJFILE_SYMTABS (objfile
, s
)
1323 bv
= BLOCKVECTOR (s
);
1324 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1325 sym
= lookup_block_symbol (block
, name
, domain
);
1328 block_found
= block
;
1329 return fixup_symbol_section (sym
, objfile
);
1337 /* A helper function for lookup_symbol_aux that interfaces with the
1338 "quick" symbol table functions. */
1340 static struct symbol
*
1341 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1342 const char *name
, const domain_enum domain
)
1344 struct symtab
*symtab
;
1345 struct blockvector
*bv
;
1346 const struct block
*block
;
1351 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1355 bv
= BLOCKVECTOR (symtab
);
1356 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1357 sym
= lookup_block_symbol (block
, name
, domain
);
1360 /* This shouldn't be necessary, but as a last resort try
1361 looking in the statics even though the psymtab claimed
1362 the symbol was global, or vice-versa. It's possible
1363 that the psymtab gets it wrong in some cases. */
1365 /* FIXME: carlton/2002-09-30: Should we really do that?
1366 If that happens, isn't it likely to be a GDB error, in
1367 which case we should fix the GDB error rather than
1368 silently dealing with it here? So I'd vote for
1369 removing the check for the symbol in the other
1371 block
= BLOCKVECTOR_BLOCK (bv
,
1372 kind
== GLOBAL_BLOCK
?
1373 STATIC_BLOCK
: GLOBAL_BLOCK
);
1374 sym
= lookup_block_symbol (block
, name
, domain
);
1376 error (_("Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n%s may be an inlined function, or may be a template function\n(if a template, try specifying an instantiation: %s<type>)."),
1377 kind
== GLOBAL_BLOCK
? "global" : "static",
1378 name
, symtab
->filename
, name
, name
);
1380 return fixup_symbol_section (sym
, objfile
);
1383 /* A default version of lookup_symbol_nonlocal for use by languages
1384 that can't think of anything better to do. This implements the C
1388 basic_lookup_symbol_nonlocal (const char *name
,
1389 const struct block
*block
,
1390 const domain_enum domain
)
1394 /* NOTE: carlton/2003-05-19: The comments below were written when
1395 this (or what turned into this) was part of lookup_symbol_aux;
1396 I'm much less worried about these questions now, since these
1397 decisions have turned out well, but I leave these comments here
1400 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1401 not it would be appropriate to search the current global block
1402 here as well. (That's what this code used to do before the
1403 is_a_field_of_this check was moved up.) On the one hand, it's
1404 redundant with the lookup_symbol_aux_symtabs search that happens
1405 next. On the other hand, if decode_line_1 is passed an argument
1406 like filename:var, then the user presumably wants 'var' to be
1407 searched for in filename. On the third hand, there shouldn't be
1408 multiple global variables all of which are named 'var', and it's
1409 not like decode_line_1 has ever restricted its search to only
1410 global variables in a single filename. All in all, only
1411 searching the static block here seems best: it's correct and it's
1414 /* NOTE: carlton/2002-12-05: There's also a possible performance
1415 issue here: if you usually search for global symbols in the
1416 current file, then it would be slightly better to search the
1417 current global block before searching all the symtabs. But there
1418 are other factors that have a much greater effect on performance
1419 than that one, so I don't think we should worry about that for
1422 sym
= lookup_symbol_static (name
, block
, domain
);
1426 return lookup_symbol_global (name
, block
, domain
);
1429 /* Lookup a symbol in the static block associated to BLOCK, if there
1430 is one; do nothing if BLOCK is NULL or a global block. */
1433 lookup_symbol_static (const char *name
,
1434 const struct block
*block
,
1435 const domain_enum domain
)
1437 const struct block
*static_block
= block_static_block (block
);
1439 if (static_block
!= NULL
)
1440 return lookup_symbol_aux_block (name
, static_block
, domain
);
1445 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1449 lookup_symbol_global (const char *name
,
1450 const struct block
*block
,
1451 const domain_enum domain
)
1453 struct symbol
*sym
= NULL
;
1454 struct objfile
*objfile
= NULL
;
1456 /* Call library-specific lookup procedure. */
1457 objfile
= lookup_objfile_from_block (block
);
1458 if (objfile
!= NULL
)
1459 sym
= solib_global_lookup (objfile
, name
, domain
);
1463 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, domain
);
1467 ALL_OBJFILES (objfile
)
1469 sym
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
, name
, domain
);
1478 symbol_matches_domain (enum language symbol_language
,
1479 domain_enum symbol_domain
,
1482 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1483 A Java class declaration also defines a typedef for the class.
1484 Similarly, any Ada type declaration implicitly defines a typedef. */
1485 if (symbol_language
== language_cplus
1486 || symbol_language
== language_d
1487 || symbol_language
== language_java
1488 || symbol_language
== language_ada
)
1490 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1491 && symbol_domain
== STRUCT_DOMAIN
)
1494 /* For all other languages, strict match is required. */
1495 return (symbol_domain
== domain
);
1498 /* Look up a type named NAME in the struct_domain. The type returned
1499 must not be opaque -- i.e., must have at least one field
1503 lookup_transparent_type (const char *name
)
1505 return current_language
->la_lookup_transparent_type (name
);
1508 /* A helper for basic_lookup_transparent_type that interfaces with the
1509 "quick" symbol table functions. */
1511 static struct type
*
1512 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1515 struct symtab
*symtab
;
1516 struct blockvector
*bv
;
1517 struct block
*block
;
1522 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1526 bv
= BLOCKVECTOR (symtab
);
1527 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1528 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1531 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1533 /* This shouldn't be necessary, but as a last resort
1534 * try looking in the 'other kind' even though the psymtab
1535 * claimed the symbol was one thing. It's possible that
1536 * the psymtab gets it wrong in some cases.
1538 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1539 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1541 /* FIXME; error is wrong in one case */
1542 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1543 %s may be an inlined function, or may be a template function\n\
1544 (if a template, try specifying an instantiation: %s<type>)."),
1545 name
, symtab
->filename
, name
, name
);
1547 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1548 return SYMBOL_TYPE (sym
);
1553 /* The standard implementation of lookup_transparent_type. This code
1554 was modeled on lookup_symbol -- the parts not relevant to looking
1555 up types were just left out. In particular it's assumed here that
1556 types are available in struct_domain and only at file-static or
1560 basic_lookup_transparent_type (const char *name
)
1563 struct symtab
*s
= NULL
;
1564 struct blockvector
*bv
;
1565 struct objfile
*objfile
;
1566 struct block
*block
;
1569 /* Now search all the global symbols. Do the symtab's first, then
1570 check the psymtab's. If a psymtab indicates the existence
1571 of the desired name as a global, then do psymtab-to-symtab
1572 conversion on the fly and return the found symbol. */
1574 ALL_OBJFILES (objfile
)
1577 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1579 name
, STRUCT_DOMAIN
);
1581 ALL_OBJFILE_SYMTABS (objfile
, s
)
1584 bv
= BLOCKVECTOR (s
);
1585 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1586 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1587 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1589 return SYMBOL_TYPE (sym
);
1594 ALL_OBJFILES (objfile
)
1596 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1601 /* Now search the static file-level symbols.
1602 Not strictly correct, but more useful than an error.
1603 Do the symtab's first, then
1604 check the psymtab's. If a psymtab indicates the existence
1605 of the desired name as a file-level static, then do psymtab-to-symtab
1606 conversion on the fly and return the found symbol.
1609 ALL_PRIMARY_SYMTABS (objfile
, s
)
1611 bv
= BLOCKVECTOR (s
);
1612 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1613 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1614 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1616 return SYMBOL_TYPE (sym
);
1620 ALL_OBJFILES (objfile
)
1622 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1627 return (struct type
*) 0;
1631 /* Find the name of the file containing main(). */
1632 /* FIXME: What about languages without main() or specially linked
1633 executables that have no main() ? */
1636 find_main_filename (void)
1638 struct objfile
*objfile
;
1639 char *name
= main_name ();
1641 ALL_OBJFILES (objfile
)
1647 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1654 /* Search BLOCK for symbol NAME in DOMAIN.
1656 Note that if NAME is the demangled form of a C++ symbol, we will fail
1657 to find a match during the binary search of the non-encoded names, but
1658 for now we don't worry about the slight inefficiency of looking for
1659 a match we'll never find, since it will go pretty quick. Once the
1660 binary search terminates, we drop through and do a straight linear
1661 search on the symbols. Each symbol which is marked as being a ObjC/C++
1662 symbol (language_cplus or language_objc set) has both the encoded and
1663 non-encoded names tested for a match.
1667 lookup_block_symbol (const struct block
*block
, const char *name
,
1668 const domain_enum domain
)
1670 struct dict_iterator iter
;
1673 if (!BLOCK_FUNCTION (block
))
1675 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1677 sym
= dict_iter_name_next (name
, &iter
))
1679 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1680 SYMBOL_DOMAIN (sym
), domain
))
1687 /* Note that parameter symbols do not always show up last in the
1688 list; this loop makes sure to take anything else other than
1689 parameter symbols first; it only uses parameter symbols as a
1690 last resort. Note that this only takes up extra computation
1693 struct symbol
*sym_found
= NULL
;
1695 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1697 sym
= dict_iter_name_next (name
, &iter
))
1699 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1700 SYMBOL_DOMAIN (sym
), domain
))
1703 if (!SYMBOL_IS_ARGUMENT (sym
))
1709 return (sym_found
); /* Will be NULL if not found. */
1713 /* Find the symtab associated with PC and SECTION. Look through the
1714 psymtabs and read in another symtab if necessary. */
1717 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
1720 struct blockvector
*bv
;
1721 struct symtab
*s
= NULL
;
1722 struct symtab
*best_s
= NULL
;
1723 struct objfile
*objfile
;
1724 struct program_space
*pspace
;
1725 CORE_ADDR distance
= 0;
1726 struct minimal_symbol
*msymbol
;
1728 pspace
= current_program_space
;
1730 /* If we know that this is not a text address, return failure. This is
1731 necessary because we loop based on the block's high and low code
1732 addresses, which do not include the data ranges, and because
1733 we call find_pc_sect_psymtab which has a similar restriction based
1734 on the partial_symtab's texthigh and textlow. */
1735 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1737 && (MSYMBOL_TYPE (msymbol
) == mst_data
1738 || MSYMBOL_TYPE (msymbol
) == mst_bss
1739 || MSYMBOL_TYPE (msymbol
) == mst_abs
1740 || MSYMBOL_TYPE (msymbol
) == mst_file_data
1741 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
1744 /* Search all symtabs for the one whose file contains our address, and which
1745 is the smallest of all the ones containing the address. This is designed
1746 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1747 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1748 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1750 This happens for native ecoff format, where code from included files
1751 gets its own symtab. The symtab for the included file should have
1752 been read in already via the dependency mechanism.
1753 It might be swifter to create several symtabs with the same name
1754 like xcoff does (I'm not sure).
1756 It also happens for objfiles that have their functions reordered.
1757 For these, the symtab we are looking for is not necessarily read in. */
1759 ALL_PRIMARY_SYMTABS (objfile
, s
)
1761 bv
= BLOCKVECTOR (s
);
1762 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1764 if (BLOCK_START (b
) <= pc
1765 && BLOCK_END (b
) > pc
1767 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
1769 /* For an objfile that has its functions reordered,
1770 find_pc_psymtab will find the proper partial symbol table
1771 and we simply return its corresponding symtab. */
1772 /* In order to better support objfiles that contain both
1773 stabs and coff debugging info, we continue on if a psymtab
1775 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
1777 struct symtab
*result
;
1780 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1789 struct dict_iterator iter
;
1790 struct symbol
*sym
= NULL
;
1792 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1794 fixup_symbol_section (sym
, objfile
);
1795 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
1799 continue; /* no symbol in this symtab matches section */
1801 distance
= BLOCK_END (b
) - BLOCK_START (b
);
1809 ALL_OBJFILES (objfile
)
1811 struct symtab
*result
;
1815 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1826 /* Find the symtab associated with PC. Look through the psymtabs and
1827 read in another symtab if necessary. Backward compatibility, no section */
1830 find_pc_symtab (CORE_ADDR pc
)
1832 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
1836 /* Find the source file and line number for a given PC value and SECTION.
1837 Return a structure containing a symtab pointer, a line number,
1838 and a pc range for the entire source line.
1839 The value's .pc field is NOT the specified pc.
1840 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1841 use the line that ends there. Otherwise, in that case, the line
1842 that begins there is used. */
1844 /* The big complication here is that a line may start in one file, and end just
1845 before the start of another file. This usually occurs when you #include
1846 code in the middle of a subroutine. To properly find the end of a line's PC
1847 range, we must search all symtabs associated with this compilation unit, and
1848 find the one whose first PC is closer than that of the next line in this
1851 /* If it's worth the effort, we could be using a binary search. */
1853 struct symtab_and_line
1854 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
1857 struct linetable
*l
;
1860 struct linetable_entry
*item
;
1861 struct symtab_and_line val
;
1862 struct blockvector
*bv
;
1863 struct minimal_symbol
*msymbol
;
1864 struct minimal_symbol
*mfunsym
;
1866 /* Info on best line seen so far, and where it starts, and its file. */
1868 struct linetable_entry
*best
= NULL
;
1869 CORE_ADDR best_end
= 0;
1870 struct symtab
*best_symtab
= 0;
1872 /* Store here the first line number
1873 of a file which contains the line at the smallest pc after PC.
1874 If we don't find a line whose range contains PC,
1875 we will use a line one less than this,
1876 with a range from the start of that file to the first line's pc. */
1877 struct linetable_entry
*alt
= NULL
;
1878 struct symtab
*alt_symtab
= 0;
1880 /* Info on best line seen in this file. */
1882 struct linetable_entry
*prev
;
1884 /* If this pc is not from the current frame,
1885 it is the address of the end of a call instruction.
1886 Quite likely that is the start of the following statement.
1887 But what we want is the statement containing the instruction.
1888 Fudge the pc to make sure we get that. */
1890 init_sal (&val
); /* initialize to zeroes */
1892 val
.pspace
= current_program_space
;
1894 /* It's tempting to assume that, if we can't find debugging info for
1895 any function enclosing PC, that we shouldn't search for line
1896 number info, either. However, GAS can emit line number info for
1897 assembly files --- very helpful when debugging hand-written
1898 assembly code. In such a case, we'd have no debug info for the
1899 function, but we would have line info. */
1904 /* elz: added this because this function returned the wrong
1905 information if the pc belongs to a stub (import/export)
1906 to call a shlib function. This stub would be anywhere between
1907 two functions in the target, and the line info was erroneously
1908 taken to be the one of the line before the pc.
1910 /* RT: Further explanation:
1912 * We have stubs (trampolines) inserted between procedures.
1914 * Example: "shr1" exists in a shared library, and a "shr1" stub also
1915 * exists in the main image.
1917 * In the minimal symbol table, we have a bunch of symbols
1918 * sorted by start address. The stubs are marked as "trampoline",
1919 * the others appear as text. E.g.:
1921 * Minimal symbol table for main image
1922 * main: code for main (text symbol)
1923 * shr1: stub (trampoline symbol)
1924 * foo: code for foo (text symbol)
1926 * Minimal symbol table for "shr1" image:
1928 * shr1: code for shr1 (text symbol)
1931 * So the code below is trying to detect if we are in the stub
1932 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
1933 * and if found, do the symbolization from the real-code address
1934 * rather than the stub address.
1936 * Assumptions being made about the minimal symbol table:
1937 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
1938 * if we're really in the trampoline. If we're beyond it (say
1939 * we're in "foo" in the above example), it'll have a closer
1940 * symbol (the "foo" text symbol for example) and will not
1941 * return the trampoline.
1942 * 2. lookup_minimal_symbol_text() will find a real text symbol
1943 * corresponding to the trampoline, and whose address will
1944 * be different than the trampoline address. I put in a sanity
1945 * check for the address being the same, to avoid an
1946 * infinite recursion.
1948 msymbol
= lookup_minimal_symbol_by_pc (pc
);
1949 if (msymbol
!= NULL
)
1950 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
1952 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
1954 if (mfunsym
== NULL
)
1955 /* I eliminated this warning since it is coming out
1956 * in the following situation:
1957 * gdb shmain // test program with shared libraries
1958 * (gdb) break shr1 // function in shared lib
1959 * Warning: In stub for ...
1960 * In the above situation, the shared lib is not loaded yet,
1961 * so of course we can't find the real func/line info,
1962 * but the "break" still works, and the warning is annoying.
1963 * So I commented out the warning. RT */
1964 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
1966 else if (SYMBOL_VALUE_ADDRESS (mfunsym
) == SYMBOL_VALUE_ADDRESS (msymbol
))
1967 /* Avoid infinite recursion */
1968 /* See above comment about why warning is commented out */
1969 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
1972 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
1976 s
= find_pc_sect_symtab (pc
, section
);
1979 /* if no symbol information, return previous pc */
1986 bv
= BLOCKVECTOR (s
);
1988 /* Look at all the symtabs that share this blockvector.
1989 They all have the same apriori range, that we found was right;
1990 but they have different line tables. */
1992 for (; s
&& BLOCKVECTOR (s
) == bv
; s
= s
->next
)
1994 /* Find the best line in this symtab. */
2001 /* I think len can be zero if the symtab lacks line numbers
2002 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2003 I'm not sure which, and maybe it depends on the symbol
2009 item
= l
->item
; /* Get first line info */
2011 /* Is this file's first line closer than the first lines of other files?
2012 If so, record this file, and its first line, as best alternate. */
2013 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2019 for (i
= 0; i
< len
; i
++, item
++)
2021 /* Leave prev pointing to the linetable entry for the last line
2022 that started at or before PC. */
2029 /* At this point, prev points at the line whose start addr is <= pc, and
2030 item points at the next line. If we ran off the end of the linetable
2031 (pc >= start of the last line), then prev == item. If pc < start of
2032 the first line, prev will not be set. */
2034 /* Is this file's best line closer than the best in the other files?
2035 If so, record this file, and its best line, as best so far. Don't
2036 save prev if it represents the end of a function (i.e. line number
2037 0) instead of a real line. */
2039 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2044 /* Discard BEST_END if it's before the PC of the current BEST. */
2045 if (best_end
<= best
->pc
)
2049 /* If another line (denoted by ITEM) is in the linetable and its
2050 PC is after BEST's PC, but before the current BEST_END, then
2051 use ITEM's PC as the new best_end. */
2052 if (best
&& i
< len
&& item
->pc
> best
->pc
2053 && (best_end
== 0 || best_end
> item
->pc
))
2054 best_end
= item
->pc
;
2059 /* If we didn't find any line number info, just return zeros.
2060 We used to return alt->line - 1 here, but that could be
2061 anywhere; if we don't have line number info for this PC,
2062 don't make some up. */
2065 else if (best
->line
== 0)
2067 /* If our best fit is in a range of PC's for which no line
2068 number info is available (line number is zero) then we didn't
2069 find any valid line information. */
2074 val
.symtab
= best_symtab
;
2075 val
.line
= best
->line
;
2077 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2082 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2084 val
.section
= section
;
2088 /* Backward compatibility (no section) */
2090 struct symtab_and_line
2091 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2093 struct obj_section
*section
;
2095 section
= find_pc_overlay (pc
);
2096 if (pc_in_unmapped_range (pc
, section
))
2097 pc
= overlay_mapped_address (pc
, section
);
2098 return find_pc_sect_line (pc
, section
, notcurrent
);
2101 /* Find line number LINE in any symtab whose name is the same as
2104 If found, return the symtab that contains the linetable in which it was
2105 found, set *INDEX to the index in the linetable of the best entry
2106 found, and set *EXACT_MATCH nonzero if the value returned is an
2109 If not found, return NULL. */
2112 find_line_symtab (struct symtab
*symtab
, int line
,
2113 int *index
, int *exact_match
)
2115 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2117 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2121 struct linetable
*best_linetable
;
2122 struct symtab
*best_symtab
;
2124 /* First try looking it up in the given symtab. */
2125 best_linetable
= LINETABLE (symtab
);
2126 best_symtab
= symtab
;
2127 best_index
= find_line_common (best_linetable
, line
, &exact
);
2128 if (best_index
< 0 || !exact
)
2130 /* Didn't find an exact match. So we better keep looking for
2131 another symtab with the same name. In the case of xcoff,
2132 multiple csects for one source file (produced by IBM's FORTRAN
2133 compiler) produce multiple symtabs (this is unavoidable
2134 assuming csects can be at arbitrary places in memory and that
2135 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2137 /* BEST is the smallest linenumber > LINE so far seen,
2138 or 0 if none has been seen so far.
2139 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2142 struct objfile
*objfile
;
2145 if (best_index
>= 0)
2146 best
= best_linetable
->item
[best_index
].line
;
2150 ALL_OBJFILES (objfile
)
2153 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2157 /* Get symbol full file name if possible. */
2158 symtab_to_fullname (symtab
);
2160 ALL_SYMTABS (objfile
, s
)
2162 struct linetable
*l
;
2165 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2167 if (symtab
->fullname
!= NULL
2168 && symtab_to_fullname (s
) != NULL
2169 && FILENAME_CMP (symtab
->fullname
, s
->fullname
) != 0)
2172 ind
= find_line_common (l
, line
, &exact
);
2182 if (best
== 0 || l
->item
[ind
].line
< best
)
2184 best
= l
->item
[ind
].line
;
2197 *index
= best_index
;
2199 *exact_match
= exact
;
2204 /* Set the PC value for a given source file and line number and return true.
2205 Returns zero for invalid line number (and sets the PC to 0).
2206 The source file is specified with a struct symtab. */
2209 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2211 struct linetable
*l
;
2218 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2221 l
= LINETABLE (symtab
);
2222 *pc
= l
->item
[ind
].pc
;
2229 /* Find the range of pc values in a line.
2230 Store the starting pc of the line into *STARTPTR
2231 and the ending pc (start of next line) into *ENDPTR.
2232 Returns 1 to indicate success.
2233 Returns 0 if could not find the specified line. */
2236 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2239 CORE_ADDR startaddr
;
2240 struct symtab_and_line found_sal
;
2243 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2246 /* This whole function is based on address. For example, if line 10 has
2247 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2248 "info line *0x123" should say the line goes from 0x100 to 0x200
2249 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2250 This also insures that we never give a range like "starts at 0x134
2251 and ends at 0x12c". */
2253 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2254 if (found_sal
.line
!= sal
.line
)
2256 /* The specified line (sal) has zero bytes. */
2257 *startptr
= found_sal
.pc
;
2258 *endptr
= found_sal
.pc
;
2262 *startptr
= found_sal
.pc
;
2263 *endptr
= found_sal
.end
;
2268 /* Given a line table and a line number, return the index into the line
2269 table for the pc of the nearest line whose number is >= the specified one.
2270 Return -1 if none is found. The value is >= 0 if it is an index.
2272 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2275 find_line_common (struct linetable
*l
, int lineno
,
2281 /* BEST is the smallest linenumber > LINENO so far seen,
2282 or 0 if none has been seen so far.
2283 BEST_INDEX identifies the item for it. */
2285 int best_index
= -1;
2296 for (i
= 0; i
< len
; i
++)
2298 struct linetable_entry
*item
= &(l
->item
[i
]);
2300 if (item
->line
== lineno
)
2302 /* Return the first (lowest address) entry which matches. */
2307 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2314 /* If we got here, we didn't get an exact match. */
2319 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2321 struct symtab_and_line sal
;
2323 sal
= find_pc_line (pc
, 0);
2326 return sal
.symtab
!= 0;
2329 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2330 address for that function that has an entry in SYMTAB's line info
2331 table. If such an entry cannot be found, return FUNC_ADDR
2334 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2336 CORE_ADDR func_start
, func_end
;
2337 struct linetable
*l
;
2340 /* Give up if this symbol has no lineinfo table. */
2341 l
= LINETABLE (symtab
);
2345 /* Get the range for the function's PC values, or give up if we
2346 cannot, for some reason. */
2347 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2350 /* Linetable entries are ordered by PC values, see the commentary in
2351 symtab.h where `struct linetable' is defined. Thus, the first
2352 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2353 address we are looking for. */
2354 for (i
= 0; i
< l
->nitems
; i
++)
2356 struct linetable_entry
*item
= &(l
->item
[i
]);
2358 /* Don't use line numbers of zero, they mark special entries in
2359 the table. See the commentary on symtab.h before the
2360 definition of struct linetable. */
2361 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2368 /* Given a function symbol SYM, find the symtab and line for the start
2370 If the argument FUNFIRSTLINE is nonzero, we want the first line
2371 of real code inside the function. */
2373 struct symtab_and_line
2374 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2376 struct symtab_and_line sal
;
2378 fixup_symbol_section (sym
, NULL
);
2379 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2380 SYMBOL_OBJ_SECTION (sym
), 0);
2382 /* We always should have a line for the function start address.
2383 If we don't, something is odd. Create a plain SAL refering
2384 just the PC and hope that skip_prologue_sal (if requested)
2385 can find a line number for after the prologue. */
2386 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2389 sal
.pspace
= current_program_space
;
2390 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2391 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2395 skip_prologue_sal (&sal
);
2400 /* Adjust SAL to the first instruction past the function prologue.
2401 If the PC was explicitly specified, the SAL is not changed.
2402 If the line number was explicitly specified, at most the SAL's PC
2403 is updated. If SAL is already past the prologue, then do nothing. */
2405 skip_prologue_sal (struct symtab_and_line
*sal
)
2408 struct symtab_and_line start_sal
;
2409 struct cleanup
*old_chain
;
2411 struct obj_section
*section
;
2413 struct objfile
*objfile
;
2414 struct gdbarch
*gdbarch
;
2415 struct block
*b
, *function_block
;
2417 /* Do not change the SAL is PC was specified explicitly. */
2418 if (sal
->explicit_pc
)
2421 old_chain
= save_current_space_and_thread ();
2422 switch_to_program_space_and_thread (sal
->pspace
);
2424 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2427 fixup_symbol_section (sym
, NULL
);
2429 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2430 section
= SYMBOL_OBJ_SECTION (sym
);
2431 name
= SYMBOL_LINKAGE_NAME (sym
);
2432 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2436 struct minimal_symbol
*msymbol
2437 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2439 if (msymbol
== NULL
)
2441 do_cleanups (old_chain
);
2445 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2446 section
= SYMBOL_OBJ_SECTION (msymbol
);
2447 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2448 objfile
= msymbol_objfile (msymbol
);
2451 gdbarch
= get_objfile_arch (objfile
);
2453 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2454 so that gdbarch_skip_prologue has something unique to work on. */
2455 if (section_is_overlay (section
) && !section_is_mapped (section
))
2456 pc
= overlay_unmapped_address (pc
, section
);
2458 /* Skip "first line" of function (which is actually its prologue). */
2459 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2460 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2462 /* For overlays, map pc back into its mapped VMA range. */
2463 pc
= overlay_mapped_address (pc
, section
);
2465 /* Calculate line number. */
2466 start_sal
= find_pc_sect_line (pc
, section
, 0);
2468 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2469 line is still part of the same function. */
2470 if (start_sal
.pc
!= pc
2471 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2472 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2473 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2474 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2476 /* First pc of next line */
2478 /* Recalculate the line number (might not be N+1). */
2479 start_sal
= find_pc_sect_line (pc
, section
, 0);
2482 /* On targets with executable formats that don't have a concept of
2483 constructors (ELF with .init has, PE doesn't), gcc emits a call
2484 to `__main' in `main' between the prologue and before user
2486 if (gdbarch_skip_main_prologue_p (gdbarch
)
2487 && name
&& strcmp (name
, "main") == 0)
2489 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2490 /* Recalculate the line number (might not be N+1). */
2491 start_sal
= find_pc_sect_line (pc
, section
, 0);
2494 /* If we still don't have a valid source line, try to find the first
2495 PC in the lineinfo table that belongs to the same function. This
2496 happens with COFF debug info, which does not seem to have an
2497 entry in lineinfo table for the code after the prologue which has
2498 no direct relation to source. For example, this was found to be
2499 the case with the DJGPP target using "gcc -gcoff" when the
2500 compiler inserted code after the prologue to make sure the stack
2502 if (sym
&& start_sal
.symtab
== NULL
)
2504 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2505 /* Recalculate the line number. */
2506 start_sal
= find_pc_sect_line (pc
, section
, 0);
2509 do_cleanups (old_chain
);
2511 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2512 forward SAL to the end of the prologue. */
2517 sal
->section
= section
;
2519 /* Unless the explicit_line flag was set, update the SAL line
2520 and symtab to correspond to the modified PC location. */
2521 if (sal
->explicit_line
)
2524 sal
->symtab
= start_sal
.symtab
;
2525 sal
->line
= start_sal
.line
;
2526 sal
->end
= start_sal
.end
;
2528 /* Check if we are now inside an inlined function. If we can,
2529 use the call site of the function instead. */
2530 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2531 function_block
= NULL
;
2534 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2536 else if (BLOCK_FUNCTION (b
) != NULL
)
2538 b
= BLOCK_SUPERBLOCK (b
);
2540 if (function_block
!= NULL
2541 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2543 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2544 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2548 /* If P is of the form "operator[ \t]+..." where `...' is
2549 some legitimate operator text, return a pointer to the
2550 beginning of the substring of the operator text.
2551 Otherwise, return "". */
2553 operator_chars (char *p
, char **end
)
2556 if (strncmp (p
, "operator", 8))
2560 /* Don't get faked out by `operator' being part of a longer
2562 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2565 /* Allow some whitespace between `operator' and the operator symbol. */
2566 while (*p
== ' ' || *p
== '\t')
2569 /* Recognize 'operator TYPENAME'. */
2571 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2575 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2584 case '\\': /* regexp quoting */
2587 if (p
[2] == '=') /* 'operator\*=' */
2589 else /* 'operator\*' */
2593 else if (p
[1] == '[')
2596 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2597 else if (p
[2] == '\\' && p
[3] == ']')
2599 *end
= p
+ 4; /* 'operator\[\]' */
2603 error (_("nothing is allowed between '[' and ']'"));
2607 /* Gratuitous qoute: skip it and move on. */
2629 if (p
[0] == '-' && p
[1] == '>')
2631 /* Struct pointer member operator 'operator->'. */
2634 *end
= p
+ 3; /* 'operator->*' */
2637 else if (p
[2] == '\\')
2639 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2644 *end
= p
+ 2; /* 'operator->' */
2648 if (p
[1] == '=' || p
[1] == p
[0])
2659 error (_("`operator ()' must be specified without whitespace in `()'"));
2664 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2669 error (_("`operator []' must be specified without whitespace in `[]'"));
2673 error (_("`operator %s' not supported"), p
);
2682 /* If FILE is not already in the table of files, return zero;
2683 otherwise return non-zero. Optionally add FILE to the table if ADD
2684 is non-zero. If *FIRST is non-zero, forget the old table
2687 filename_seen (const char *file
, int add
, int *first
)
2689 /* Table of files seen so far. */
2690 static const char **tab
= NULL
;
2691 /* Allocated size of tab in elements.
2692 Start with one 256-byte block (when using GNU malloc.c).
2693 24 is the malloc overhead when range checking is in effect. */
2694 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2695 /* Current size of tab in elements. */
2696 static int tab_cur_size
;
2702 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2706 /* Is FILE in tab? */
2707 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2708 if (strcmp (*p
, file
) == 0)
2711 /* No; maybe add it to tab. */
2714 if (tab_cur_size
== tab_alloc_size
)
2716 tab_alloc_size
*= 2;
2717 tab
= (const char **) xrealloc ((char *) tab
,
2718 tab_alloc_size
* sizeof (*tab
));
2720 tab
[tab_cur_size
++] = file
;
2726 /* Slave routine for sources_info. Force line breaks at ,'s.
2727 NAME is the name to print and *FIRST is nonzero if this is the first
2728 name printed. Set *FIRST to zero. */
2730 output_source_filename (const char *name
, int *first
)
2732 /* Since a single source file can result in several partial symbol
2733 tables, we need to avoid printing it more than once. Note: if
2734 some of the psymtabs are read in and some are not, it gets
2735 printed both under "Source files for which symbols have been
2736 read" and "Source files for which symbols will be read in on
2737 demand". I consider this a reasonable way to deal with the
2738 situation. I'm not sure whether this can also happen for
2739 symtabs; it doesn't hurt to check. */
2741 /* Was NAME already seen? */
2742 if (filename_seen (name
, 1, first
))
2744 /* Yes; don't print it again. */
2747 /* No; print it and reset *FIRST. */
2754 printf_filtered (", ");
2758 fputs_filtered (name
, gdb_stdout
);
2761 /* A callback for map_partial_symbol_filenames. */
2763 output_partial_symbol_filename (const char *fullname
, const char *filename
,
2766 output_source_filename (fullname
? fullname
: filename
, data
);
2770 sources_info (char *ignore
, int from_tty
)
2773 struct objfile
*objfile
;
2776 if (!have_full_symbols () && !have_partial_symbols ())
2778 error (_("No symbol table is loaded. Use the \"file\" command."));
2781 printf_filtered ("Source files for which symbols have been read in:\n\n");
2784 ALL_SYMTABS (objfile
, s
)
2786 const char *fullname
= symtab_to_fullname (s
);
2788 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
2790 printf_filtered ("\n\n");
2792 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2795 map_partial_symbol_filenames (output_partial_symbol_filename
, &first
);
2796 printf_filtered ("\n");
2800 file_matches (const char *file
, char *files
[], int nfiles
)
2804 if (file
!= NULL
&& nfiles
!= 0)
2806 for (i
= 0; i
< nfiles
; i
++)
2808 if (strcmp (files
[i
], lbasename (file
)) == 0)
2812 else if (nfiles
== 0)
2817 /* Free any memory associated with a search. */
2819 free_search_symbols (struct symbol_search
*symbols
)
2821 struct symbol_search
*p
;
2822 struct symbol_search
*next
;
2824 for (p
= symbols
; p
!= NULL
; p
= next
)
2832 do_free_search_symbols_cleanup (void *symbols
)
2834 free_search_symbols (symbols
);
2838 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
2840 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
2843 /* Helper function for sort_search_symbols and qsort. Can only
2844 sort symbols, not minimal symbols. */
2846 compare_search_syms (const void *sa
, const void *sb
)
2848 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
2849 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
2851 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
2852 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
2855 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2856 prevtail where it is, but update its next pointer to point to
2857 the first of the sorted symbols. */
2858 static struct symbol_search
*
2859 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
2861 struct symbol_search
**symbols
, *symp
, *old_next
;
2864 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
2866 symp
= prevtail
->next
;
2867 for (i
= 0; i
< nfound
; i
++)
2872 /* Generally NULL. */
2875 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
2876 compare_search_syms
);
2879 for (i
= 0; i
< nfound
; i
++)
2881 symp
->next
= symbols
[i
];
2884 symp
->next
= old_next
;
2890 /* An object of this type is passed as the user_data to the
2891 expand_symtabs_matching method. */
2892 struct search_symbols_data
2899 /* A callback for expand_symtabs_matching. */
2901 search_symbols_file_matches (const char *filename
, void *user_data
)
2903 struct search_symbols_data
*data
= user_data
;
2905 return file_matches (filename
, data
->files
, data
->nfiles
);
2908 /* A callback for expand_symtabs_matching. */
2910 search_symbols_name_matches (const char *symname
, void *user_data
)
2912 struct search_symbols_data
*data
= user_data
;
2914 return data
->regexp
== NULL
|| re_exec (symname
);
2917 /* Search the symbol table for matches to the regular expression REGEXP,
2918 returning the results in *MATCHES.
2920 Only symbols of KIND are searched:
2921 FUNCTIONS_DOMAIN - search all functions
2922 TYPES_DOMAIN - search all type names
2923 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2924 and constants (enums)
2926 free_search_symbols should be called when *MATCHES is no longer needed.
2928 The results are sorted locally; each symtab's global and static blocks are
2929 separately alphabetized.
2932 search_symbols (char *regexp
, domain_enum kind
, int nfiles
, char *files
[],
2933 struct symbol_search
**matches
)
2936 struct blockvector
*bv
;
2939 struct dict_iterator iter
;
2941 struct objfile
*objfile
;
2942 struct minimal_symbol
*msymbol
;
2945 static enum minimal_symbol_type types
[]
2946 = {mst_data
, mst_text
, mst_abs
, mst_unknown
};
2947 static enum minimal_symbol_type types2
[]
2948 = {mst_bss
, mst_file_text
, mst_abs
, mst_unknown
};
2949 static enum minimal_symbol_type types3
[]
2950 = {mst_file_data
, mst_solib_trampoline
, mst_abs
, mst_unknown
};
2951 static enum minimal_symbol_type types4
[]
2952 = {mst_file_bss
, mst_text
, mst_abs
, mst_unknown
};
2953 enum minimal_symbol_type ourtype
;
2954 enum minimal_symbol_type ourtype2
;
2955 enum minimal_symbol_type ourtype3
;
2956 enum minimal_symbol_type ourtype4
;
2957 struct symbol_search
*sr
;
2958 struct symbol_search
*psr
;
2959 struct symbol_search
*tail
;
2960 struct cleanup
*old_chain
= NULL
;
2961 struct search_symbols_data datum
;
2963 if (kind
< VARIABLES_DOMAIN
)
2964 error (_("must search on specific domain"));
2966 ourtype
= types
[(int) (kind
- VARIABLES_DOMAIN
)];
2967 ourtype2
= types2
[(int) (kind
- VARIABLES_DOMAIN
)];
2968 ourtype3
= types3
[(int) (kind
- VARIABLES_DOMAIN
)];
2969 ourtype4
= types4
[(int) (kind
- VARIABLES_DOMAIN
)];
2971 sr
= *matches
= NULL
;
2976 /* Make sure spacing is right for C++ operators.
2977 This is just a courtesy to make the matching less sensitive
2978 to how many spaces the user leaves between 'operator'
2979 and <TYPENAME> or <OPERATOR>. */
2981 char *opname
= operator_chars (regexp
, &opend
);
2985 int fix
= -1; /* -1 means ok; otherwise number of spaces needed. */
2987 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
2989 /* There should 1 space between 'operator' and 'TYPENAME'. */
2990 if (opname
[-1] != ' ' || opname
[-2] == ' ')
2995 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
2996 if (opname
[-1] == ' ')
2999 /* If wrong number of spaces, fix it. */
3002 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3004 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3009 if (0 != (val
= re_comp (regexp
)))
3010 error (_("Invalid regexp (%s): %s"), val
, regexp
);
3013 /* Search through the partial symtabs *first* for all symbols
3014 matching the regexp. That way we don't have to reproduce all of
3015 the machinery below. */
3017 datum
.nfiles
= nfiles
;
3018 datum
.files
= files
;
3019 datum
.regexp
= regexp
;
3020 ALL_OBJFILES (objfile
)
3023 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3024 search_symbols_file_matches
,
3025 search_symbols_name_matches
,
3030 /* Here, we search through the minimal symbol tables for functions
3031 and variables that match, and force their symbols to be read.
3032 This is in particular necessary for demangled variable names,
3033 which are no longer put into the partial symbol tables.
3034 The symbol will then be found during the scan of symtabs below.
3036 For functions, find_pc_symtab should succeed if we have debug info
3037 for the function, for variables we have to call lookup_symbol
3038 to determine if the variable has debug info.
3039 If the lookup fails, set found_misc so that we will rescan to print
3040 any matching symbols without debug info.
3043 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3045 ALL_MSYMBOLS (objfile
, msymbol
)
3049 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3050 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3051 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3052 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3055 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3057 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3059 /* FIXME: carlton/2003-02-04: Given that the
3060 semantics of lookup_symbol keeps on changing
3061 slightly, it would be a nice idea if we had a
3062 function lookup_symbol_minsym that found the
3063 symbol associated to a given minimal symbol (if
3065 if (kind
== FUNCTIONS_DOMAIN
3066 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3067 (struct block
*) NULL
,
3077 ALL_PRIMARY_SYMTABS (objfile
, s
)
3079 bv
= BLOCKVECTOR (s
);
3080 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3082 struct symbol_search
*prevtail
= tail
;
3085 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3086 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3088 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3092 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3094 || re_exec (SYMBOL_NATURAL_NAME (sym
)) != 0)
3095 && ((kind
== VARIABLES_DOMAIN
3096 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3097 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3098 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3099 /* LOC_CONST can be used for more than just enums,
3100 e.g., c++ static const members.
3101 We only want to skip enums here. */
3102 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3103 && TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_ENUM
))
3104 || (kind
== FUNCTIONS_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3105 || (kind
== TYPES_DOMAIN
&& SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3108 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3110 psr
->symtab
= real_symtab
;
3112 psr
->msymbol
= NULL
;
3124 if (prevtail
== NULL
)
3126 struct symbol_search dummy
;
3129 tail
= sort_search_symbols (&dummy
, nfound
);
3132 old_chain
= make_cleanup_free_search_symbols (sr
);
3135 tail
= sort_search_symbols (prevtail
, nfound
);
3140 /* If there are no eyes, avoid all contact. I mean, if there are
3141 no debug symbols, then print directly from the msymbol_vector. */
3143 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3145 ALL_MSYMBOLS (objfile
, msymbol
)
3149 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3150 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3151 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3152 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3155 || re_exec (SYMBOL_NATURAL_NAME (msymbol
)) != 0)
3157 /* Functions: Look up by address. */
3158 if (kind
!= FUNCTIONS_DOMAIN
||
3159 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3161 /* Variables/Absolutes: Look up by name */
3162 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3163 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3167 psr
= (struct symbol_search
*) xmalloc (sizeof (struct symbol_search
));
3169 psr
->msymbol
= msymbol
;
3176 old_chain
= make_cleanup_free_search_symbols (sr
);
3190 discard_cleanups (old_chain
);
3193 /* Helper function for symtab_symbol_info, this function uses
3194 the data returned from search_symbols() to print information
3195 regarding the match to gdb_stdout.
3198 print_symbol_info (domain_enum kind
, struct symtab
*s
, struct symbol
*sym
,
3199 int block
, char *last
)
3201 if (last
== NULL
|| strcmp (last
, s
->filename
) != 0)
3203 fputs_filtered ("\nFile ", gdb_stdout
);
3204 fputs_filtered (s
->filename
, gdb_stdout
);
3205 fputs_filtered (":\n", gdb_stdout
);
3208 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3209 printf_filtered ("static ");
3211 /* Typedef that is not a C++ class */
3212 if (kind
== TYPES_DOMAIN
3213 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3214 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3215 /* variable, func, or typedef-that-is-c++-class */
3216 else if (kind
< TYPES_DOMAIN
||
3217 (kind
== TYPES_DOMAIN
&&
3218 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3220 type_print (SYMBOL_TYPE (sym
),
3221 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3222 ? "" : SYMBOL_PRINT_NAME (sym
)),
3225 printf_filtered (";\n");
3229 /* This help function for symtab_symbol_info() prints information
3230 for non-debugging symbols to gdb_stdout.
3233 print_msymbol_info (struct minimal_symbol
*msymbol
)
3235 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3238 if (gdbarch_addr_bit (gdbarch
) <= 32)
3239 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3240 & (CORE_ADDR
) 0xffffffff,
3243 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3245 printf_filtered ("%s %s\n",
3246 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3249 /* This is the guts of the commands "info functions", "info types", and
3250 "info variables". It calls search_symbols to find all matches and then
3251 print_[m]symbol_info to print out some useful information about the
3255 symtab_symbol_info (char *regexp
, domain_enum kind
, int from_tty
)
3257 static char *classnames
[] = {"variable", "function", "type", "method"};
3258 struct symbol_search
*symbols
;
3259 struct symbol_search
*p
;
3260 struct cleanup
*old_chain
;
3261 char *last_filename
= NULL
;
3264 /* must make sure that if we're interrupted, symbols gets freed */
3265 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3266 old_chain
= make_cleanup_free_search_symbols (symbols
);
3268 printf_filtered (regexp
3269 ? "All %ss matching regular expression \"%s\":\n"
3270 : "All defined %ss:\n",
3271 classnames
[(int) (kind
- VARIABLES_DOMAIN
)], regexp
);
3273 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3277 if (p
->msymbol
!= NULL
)
3281 printf_filtered ("\nNon-debugging symbols:\n");
3284 print_msymbol_info (p
->msymbol
);
3288 print_symbol_info (kind
,
3293 last_filename
= p
->symtab
->filename
;
3297 do_cleanups (old_chain
);
3301 variables_info (char *regexp
, int from_tty
)
3303 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3307 functions_info (char *regexp
, int from_tty
)
3309 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3314 types_info (char *regexp
, int from_tty
)
3316 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3319 /* Breakpoint all functions matching regular expression. */
3322 rbreak_command_wrapper (char *regexp
, int from_tty
)
3324 rbreak_command (regexp
, from_tty
);
3327 /* A cleanup function that calls end_rbreak_breakpoints. */
3330 do_end_rbreak_breakpoints (void *ignore
)
3332 end_rbreak_breakpoints ();
3336 rbreak_command (char *regexp
, int from_tty
)
3338 struct symbol_search
*ss
;
3339 struct symbol_search
*p
;
3340 struct cleanup
*old_chain
;
3341 char *string
= NULL
;
3343 char **files
= NULL
;
3348 char *colon
= strchr (regexp
, ':');
3350 if (colon
&& *(colon
+ 1) != ':')
3355 colon_index
= colon
- regexp
;
3356 file_name
= alloca (colon_index
+ 1);
3357 memcpy (file_name
, regexp
, colon_index
);
3358 file_name
[colon_index
--] = 0;
3359 while (isspace (file_name
[colon_index
]))
3360 file_name
[colon_index
--] = 0;
3364 while (isspace (*regexp
)) regexp
++;
3368 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3369 old_chain
= make_cleanup_free_search_symbols (ss
);
3370 make_cleanup (free_current_contents
, &string
);
3372 start_rbreak_breakpoints ();
3373 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3374 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3376 if (p
->msymbol
== NULL
)
3378 int newlen
= (strlen (p
->symtab
->filename
)
3379 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3384 string
= xrealloc (string
, newlen
);
3387 strcpy (string
, p
->symtab
->filename
);
3388 strcat (string
, ":'");
3389 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3390 strcat (string
, "'");
3391 break_command (string
, from_tty
);
3392 print_symbol_info (FUNCTIONS_DOMAIN
,
3396 p
->symtab
->filename
);
3400 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3404 string
= xrealloc (string
, newlen
);
3407 strcpy (string
, "'");
3408 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3409 strcat (string
, "'");
3411 break_command (string
, from_tty
);
3412 printf_filtered ("<function, no debug info> %s;\n",
3413 SYMBOL_PRINT_NAME (p
->msymbol
));
3417 do_cleanups (old_chain
);
3421 /* Helper routine for make_symbol_completion_list. */
3423 static int return_val_size
;
3424 static int return_val_index
;
3425 static char **return_val
;
3427 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3428 completion_list_add_name \
3429 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3431 /* Test to see if the symbol specified by SYMNAME (which is already
3432 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3433 characters. If so, add it to the current completion list. */
3436 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3437 char *text
, char *word
)
3441 /* clip symbols that cannot match */
3443 if (strncmp (symname
, sym_text
, sym_text_len
) != 0)
3448 /* We have a match for a completion, so add SYMNAME to the current list
3449 of matches. Note that the name is moved to freshly malloc'd space. */
3454 if (word
== sym_text
)
3456 new = xmalloc (strlen (symname
) + 5);
3457 strcpy (new, symname
);
3459 else if (word
> sym_text
)
3461 /* Return some portion of symname. */
3462 new = xmalloc (strlen (symname
) + 5);
3463 strcpy (new, symname
+ (word
- sym_text
));
3467 /* Return some of SYM_TEXT plus symname. */
3468 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3469 strncpy (new, word
, sym_text
- word
);
3470 new[sym_text
- word
] = '\0';
3471 strcat (new, symname
);
3474 if (return_val_index
+ 3 > return_val_size
)
3476 newsize
= (return_val_size
*= 2) * sizeof (char *);
3477 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3479 return_val
[return_val_index
++] = new;
3480 return_val
[return_val_index
] = NULL
;
3484 /* ObjC: In case we are completing on a selector, look as the msymbol
3485 again and feed all the selectors into the mill. */
3488 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3489 int sym_text_len
, char *text
, char *word
)
3491 static char *tmp
= NULL
;
3492 static unsigned int tmplen
= 0;
3494 char *method
, *category
, *selector
;
3497 method
= SYMBOL_NATURAL_NAME (msymbol
);
3499 /* Is it a method? */
3500 if ((method
[0] != '-') && (method
[0] != '+'))
3503 if (sym_text
[0] == '[')
3504 /* Complete on shortened method method. */
3505 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3507 while ((strlen (method
) + 1) >= tmplen
)
3513 tmp
= xrealloc (tmp
, tmplen
);
3515 selector
= strchr (method
, ' ');
3516 if (selector
!= NULL
)
3519 category
= strchr (method
, '(');
3521 if ((category
!= NULL
) && (selector
!= NULL
))
3523 memcpy (tmp
, method
, (category
- method
));
3524 tmp
[category
- method
] = ' ';
3525 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3526 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3527 if (sym_text
[0] == '[')
3528 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3531 if (selector
!= NULL
)
3533 /* Complete on selector only. */
3534 strcpy (tmp
, selector
);
3535 tmp2
= strchr (tmp
, ']');
3539 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3543 /* Break the non-quoted text based on the characters which are in
3544 symbols. FIXME: This should probably be language-specific. */
3547 language_search_unquoted_string (char *text
, char *p
)
3549 for (; p
> text
; --p
)
3551 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3555 if ((current_language
->la_language
== language_objc
))
3557 if (p
[-1] == ':') /* might be part of a method name */
3559 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3560 p
-= 2; /* beginning of a method name */
3561 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3562 { /* might be part of a method name */
3565 /* Seeing a ' ' or a '(' is not conclusive evidence
3566 that we are in the middle of a method name. However,
3567 finding "-[" or "+[" should be pretty un-ambiguous.
3568 Unfortunately we have to find it now to decide. */
3571 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3572 t
[-1] == ' ' || t
[-1] == ':' ||
3573 t
[-1] == '(' || t
[-1] == ')')
3578 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3579 p
= t
- 2; /* method name detected */
3580 /* else we leave with p unchanged */
3590 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
3591 int sym_text_len
, char *text
, char *word
)
3593 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3595 struct type
*t
= SYMBOL_TYPE (sym
);
3596 enum type_code c
= TYPE_CODE (t
);
3599 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3600 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3601 if (TYPE_FIELD_NAME (t
, j
))
3602 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3603 sym_text
, sym_text_len
, text
, word
);
3607 /* Type of the user_data argument passed to add_macro_name or
3608 add_partial_symbol_name. The contents are simply whatever is
3609 needed by completion_list_add_name. */
3610 struct add_name_data
3618 /* A callback used with macro_for_each and macro_for_each_in_scope.
3619 This adds a macro's name to the current completion list. */
3621 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
3624 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3626 completion_list_add_name ((char *) name
,
3627 datum
->sym_text
, datum
->sym_text_len
,
3628 datum
->text
, datum
->word
);
3631 /* A callback for map_partial_symbol_names. */
3633 add_partial_symbol_name (const char *name
, void *user_data
)
3635 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
3637 completion_list_add_name ((char *) name
,
3638 datum
->sym_text
, datum
->sym_text_len
,
3639 datum
->text
, datum
->word
);
3643 default_make_symbol_completion_list_break_on (char *text
, char *word
,
3644 const char *break_on
)
3646 /* Problem: All of the symbols have to be copied because readline
3647 frees them. I'm not going to worry about this; hopefully there
3648 won't be that many. */
3652 struct minimal_symbol
*msymbol
;
3653 struct objfile
*objfile
;
3655 const struct block
*surrounding_static_block
, *surrounding_global_block
;
3656 struct dict_iterator iter
;
3657 /* The symbol we are completing on. Points in same buffer as text. */
3659 /* Length of sym_text. */
3661 struct add_name_data datum
;
3663 /* Now look for the symbol we are supposed to complete on. */
3667 char *quote_pos
= NULL
;
3669 /* First see if this is a quoted string. */
3671 for (p
= text
; *p
!= '\0'; ++p
)
3673 if (quote_found
!= '\0')
3675 if (*p
== quote_found
)
3676 /* Found close quote. */
3678 else if (*p
== '\\' && p
[1] == quote_found
)
3679 /* A backslash followed by the quote character
3680 doesn't end the string. */
3683 else if (*p
== '\'' || *p
== '"')
3689 if (quote_found
== '\'')
3690 /* A string within single quotes can be a symbol, so complete on it. */
3691 sym_text
= quote_pos
+ 1;
3692 else if (quote_found
== '"')
3693 /* A double-quoted string is never a symbol, nor does it make sense
3694 to complete it any other way. */
3696 return_val
= (char **) xmalloc (sizeof (char *));
3697 return_val
[0] = NULL
;
3702 /* It is not a quoted string. Break it based on the characters
3703 which are in symbols. */
3706 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
3707 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
3716 sym_text_len
= strlen (sym_text
);
3718 return_val_size
= 100;
3719 return_val_index
= 0;
3720 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3721 return_val
[0] = NULL
;
3723 datum
.sym_text
= sym_text
;
3724 datum
.sym_text_len
= sym_text_len
;
3728 /* Look through the partial symtabs for all symbols which begin
3729 by matching SYM_TEXT. Add each one that you find to the list. */
3730 map_partial_symbol_names (add_partial_symbol_name
, &datum
);
3732 /* At this point scan through the misc symbol vectors and add each
3733 symbol you find to the list. Eventually we want to ignore
3734 anything that isn't a text symbol (everything else will be
3735 handled by the psymtab code above). */
3737 ALL_MSYMBOLS (objfile
, msymbol
)
3740 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
3742 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
3745 /* Search upwards from currently selected frame (so that we can
3746 complete on local vars). Also catch fields of types defined in
3747 this places which match our text string. Only complete on types
3748 visible from current context. */
3750 b
= get_selected_block (0);
3751 surrounding_static_block
= block_static_block (b
);
3752 surrounding_global_block
= block_global_block (b
);
3753 if (surrounding_static_block
!= NULL
)
3754 while (b
!= surrounding_static_block
)
3758 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3760 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
3762 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
3766 /* Stop when we encounter an enclosing function. Do not stop for
3767 non-inlined functions - the locals of the enclosing function
3768 are in scope for a nested function. */
3769 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3771 b
= BLOCK_SUPERBLOCK (b
);
3774 /* Add fields from the file's types; symbols will be added below. */
3776 if (surrounding_static_block
!= NULL
)
3777 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
3778 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3780 if (surrounding_global_block
!= NULL
)
3781 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
3782 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
3784 /* Go through the symtabs and check the externs and statics for
3785 symbols which match. */
3787 ALL_PRIMARY_SYMTABS (objfile
, s
)
3790 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3791 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3793 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3797 ALL_PRIMARY_SYMTABS (objfile
, s
)
3800 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3801 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3803 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3807 if (current_language
->la_macro_expansion
== macro_expansion_c
)
3809 struct macro_scope
*scope
;
3811 /* Add any macros visible in the default scope. Note that this
3812 may yield the occasional wrong result, because an expression
3813 might be evaluated in a scope other than the default. For
3814 example, if the user types "break file:line if <TAB>", the
3815 resulting expression will be evaluated at "file:line" -- but
3816 at there does not seem to be a way to detect this at
3818 scope
= default_macro_scope ();
3821 macro_for_each_in_scope (scope
->file
, scope
->line
,
3822 add_macro_name
, &datum
);
3826 /* User-defined macros are always visible. */
3827 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
3830 return (return_val
);
3834 default_make_symbol_completion_list (char *text
, char *word
)
3836 return default_make_symbol_completion_list_break_on (text
, word
, "");
3839 /* Return a NULL terminated array of all symbols (regardless of class)
3840 which begin by matching TEXT. If the answer is no symbols, then
3841 the return value is an array which contains only a NULL pointer. */
3844 make_symbol_completion_list (char *text
, char *word
)
3846 return current_language
->la_make_symbol_completion_list (text
, word
);
3849 /* Like make_symbol_completion_list, but suitable for use as a
3850 completion function. */
3853 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
3854 char *text
, char *word
)
3856 return make_symbol_completion_list (text
, word
);
3859 /* Like make_symbol_completion_list, but returns a list of symbols
3860 defined in a source file FILE. */
3863 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
3868 struct dict_iterator iter
;
3869 /* The symbol we are completing on. Points in same buffer as text. */
3871 /* Length of sym_text. */
3874 /* Now look for the symbol we are supposed to complete on.
3875 FIXME: This should be language-specific. */
3879 char *quote_pos
= NULL
;
3881 /* First see if this is a quoted string. */
3883 for (p
= text
; *p
!= '\0'; ++p
)
3885 if (quote_found
!= '\0')
3887 if (*p
== quote_found
)
3888 /* Found close quote. */
3890 else if (*p
== '\\' && p
[1] == quote_found
)
3891 /* A backslash followed by the quote character
3892 doesn't end the string. */
3895 else if (*p
== '\'' || *p
== '"')
3901 if (quote_found
== '\'')
3902 /* A string within single quotes can be a symbol, so complete on it. */
3903 sym_text
= quote_pos
+ 1;
3904 else if (quote_found
== '"')
3905 /* A double-quoted string is never a symbol, nor does it make sense
3906 to complete it any other way. */
3908 return_val
= (char **) xmalloc (sizeof (char *));
3909 return_val
[0] = NULL
;
3914 /* Not a quoted string. */
3915 sym_text
= language_search_unquoted_string (text
, p
);
3919 sym_text_len
= strlen (sym_text
);
3921 return_val_size
= 10;
3922 return_val_index
= 0;
3923 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
3924 return_val
[0] = NULL
;
3926 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3928 s
= lookup_symtab (srcfile
);
3931 /* Maybe they typed the file with leading directories, while the
3932 symbol tables record only its basename. */
3933 const char *tail
= lbasename (srcfile
);
3936 s
= lookup_symtab (tail
);
3939 /* If we have no symtab for that file, return an empty list. */
3941 return (return_val
);
3943 /* Go through this symtab and check the externs and statics for
3944 symbols which match. */
3946 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
3947 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3949 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3952 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
3953 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3955 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
3958 return (return_val
);
3961 /* A helper function for make_source_files_completion_list. It adds
3962 another file name to a list of possible completions, growing the
3963 list as necessary. */
3966 add_filename_to_list (const char *fname
, char *text
, char *word
,
3967 char ***list
, int *list_used
, int *list_alloced
)
3970 size_t fnlen
= strlen (fname
);
3972 if (*list_used
+ 1 >= *list_alloced
)
3975 *list
= (char **) xrealloc ((char *) *list
,
3976 *list_alloced
* sizeof (char *));
3981 /* Return exactly fname. */
3982 new = xmalloc (fnlen
+ 5);
3983 strcpy (new, fname
);
3985 else if (word
> text
)
3987 /* Return some portion of fname. */
3988 new = xmalloc (fnlen
+ 5);
3989 strcpy (new, fname
+ (word
- text
));
3993 /* Return some of TEXT plus fname. */
3994 new = xmalloc (fnlen
+ (text
- word
) + 5);
3995 strncpy (new, word
, text
- word
);
3996 new[text
- word
] = '\0';
3997 strcat (new, fname
);
3999 (*list
)[*list_used
] = new;
4000 (*list
)[++*list_used
] = NULL
;
4004 not_interesting_fname (const char *fname
)
4006 static const char *illegal_aliens
[] = {
4007 "_globals_", /* inserted by coff_symtab_read */
4012 for (i
= 0; illegal_aliens
[i
]; i
++)
4014 if (strcmp (fname
, illegal_aliens
[i
]) == 0)
4020 /* An object of this type is passed as the user_data argument to
4021 map_partial_symbol_filenames. */
4022 struct add_partial_filename_data
4033 /* A callback for map_partial_symbol_filenames. */
4035 maybe_add_partial_symtab_filename (const char *fullname
, const char *filename
,
4038 struct add_partial_filename_data
*data
= user_data
;
4040 if (not_interesting_fname (filename
))
4042 if (!filename_seen (filename
, 1, data
->first
)
4043 #if HAVE_DOS_BASED_FILE_SYSTEM
4044 && strncasecmp (filename
, data
->text
, data
->text_len
) == 0
4046 && strncmp (filename
, data
->text
, data
->text_len
) == 0
4050 /* This file matches for a completion; add it to the
4051 current list of matches. */
4052 add_filename_to_list (filename
, data
->text
, data
->word
,
4053 data
->list
, data
->list_used
, data
->list_alloced
);
4057 const char *base_name
= lbasename (filename
);
4059 if (base_name
!= filename
4060 && !filename_seen (base_name
, 1, data
->first
)
4061 #if HAVE_DOS_BASED_FILE_SYSTEM
4062 && strncasecmp (base_name
, data
->text
, data
->text_len
) == 0
4064 && strncmp (base_name
, data
->text
, data
->text_len
) == 0
4067 add_filename_to_list (base_name
, data
->text
, data
->word
,
4068 data
->list
, data
->list_used
, data
->list_alloced
);
4072 /* Return a NULL terminated array of all source files whose names
4073 begin with matching TEXT. The file names are looked up in the
4074 symbol tables of this program. If the answer is no matchess, then
4075 the return value is an array which contains only a NULL pointer. */
4078 make_source_files_completion_list (char *text
, char *word
)
4081 struct objfile
*objfile
;
4083 int list_alloced
= 1;
4085 size_t text_len
= strlen (text
);
4086 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4087 const char *base_name
;
4088 struct add_partial_filename_data datum
;
4092 if (!have_full_symbols () && !have_partial_symbols ())
4095 ALL_SYMTABS (objfile
, s
)
4097 if (not_interesting_fname (s
->filename
))
4099 if (!filename_seen (s
->filename
, 1, &first
)
4100 #if HAVE_DOS_BASED_FILE_SYSTEM
4101 && strncasecmp (s
->filename
, text
, text_len
) == 0
4103 && strncmp (s
->filename
, text
, text_len
) == 0
4107 /* This file matches for a completion; add it to the current
4109 add_filename_to_list (s
->filename
, text
, word
,
4110 &list
, &list_used
, &list_alloced
);
4114 /* NOTE: We allow the user to type a base name when the
4115 debug info records leading directories, but not the other
4116 way around. This is what subroutines of breakpoint
4117 command do when they parse file names. */
4118 base_name
= lbasename (s
->filename
);
4119 if (base_name
!= s
->filename
4120 && !filename_seen (base_name
, 1, &first
)
4121 #if HAVE_DOS_BASED_FILE_SYSTEM
4122 && strncasecmp (base_name
, text
, text_len
) == 0
4124 && strncmp (base_name
, text
, text_len
) == 0
4127 add_filename_to_list (base_name
, text
, word
,
4128 &list
, &list_used
, &list_alloced
);
4132 datum
.first
= &first
;
4135 datum
.text_len
= text_len
;
4137 datum
.list_used
= &list_used
;
4138 datum
.list_alloced
= &list_alloced
;
4139 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
);
4144 /* Determine if PC is in the prologue of a function. The prologue is the area
4145 between the first instruction of a function, and the first executable line.
4146 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4148 If non-zero, func_start is where we think the prologue starts, possibly
4149 by previous examination of symbol table information.
4153 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4155 struct symtab_and_line sal
;
4156 CORE_ADDR func_addr
, func_end
;
4158 /* We have several sources of information we can consult to figure
4160 - Compilers usually emit line number info that marks the prologue
4161 as its own "source line". So the ending address of that "line"
4162 is the end of the prologue. If available, this is the most
4164 - The minimal symbols and partial symbols, which can usually tell
4165 us the starting and ending addresses of a function.
4166 - If we know the function's start address, we can call the
4167 architecture-defined gdbarch_skip_prologue function to analyze the
4168 instruction stream and guess where the prologue ends.
4169 - Our `func_start' argument; if non-zero, this is the caller's
4170 best guess as to the function's entry point. At the time of
4171 this writing, handle_inferior_event doesn't get this right, so
4172 it should be our last resort. */
4174 /* Consult the partial symbol table, to find which function
4176 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4178 CORE_ADDR prologue_end
;
4180 /* We don't even have minsym information, so fall back to using
4181 func_start, if given. */
4183 return 1; /* We *might* be in a prologue. */
4185 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4187 return func_start
<= pc
&& pc
< prologue_end
;
4190 /* If we have line number information for the function, that's
4191 usually pretty reliable. */
4192 sal
= find_pc_line (func_addr
, 0);
4194 /* Now sal describes the source line at the function's entry point,
4195 which (by convention) is the prologue. The end of that "line",
4196 sal.end, is the end of the prologue.
4198 Note that, for functions whose source code is all on a single
4199 line, the line number information doesn't always end up this way.
4200 So we must verify that our purported end-of-prologue address is
4201 *within* the function, not at its start or end. */
4203 || sal
.end
<= func_addr
4204 || func_end
<= sal
.end
)
4206 /* We don't have any good line number info, so use the minsym
4207 information, together with the architecture-specific prologue
4209 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4211 return func_addr
<= pc
&& pc
< prologue_end
;
4214 /* We have line number info, and it looks good. */
4215 return func_addr
<= pc
&& pc
< sal
.end
;
4218 /* Given PC at the function's start address, attempt to find the
4219 prologue end using SAL information. Return zero if the skip fails.
4221 A non-optimized prologue traditionally has one SAL for the function
4222 and a second for the function body. A single line function has
4223 them both pointing at the same line.
4225 An optimized prologue is similar but the prologue may contain
4226 instructions (SALs) from the instruction body. Need to skip those
4227 while not getting into the function body.
4229 The functions end point and an increasing SAL line are used as
4230 indicators of the prologue's endpoint.
4232 This code is based on the function refine_prologue_limit (versions
4233 found in both ia64 and ppc). */
4236 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4238 struct symtab_and_line prologue_sal
;
4243 /* Get an initial range for the function. */
4244 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4245 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4247 prologue_sal
= find_pc_line (start_pc
, 0);
4248 if (prologue_sal
.line
!= 0)
4250 /* For langauges other than assembly, treat two consecutive line
4251 entries at the same address as a zero-instruction prologue.
4252 The GNU assembler emits separate line notes for each instruction
4253 in a multi-instruction macro, but compilers generally will not
4255 if (prologue_sal
.symtab
->language
!= language_asm
)
4257 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4260 /* Skip any earlier lines, and any end-of-sequence marker
4261 from a previous function. */
4262 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4263 || linetable
->item
[idx
].line
== 0)
4266 if (idx
+1 < linetable
->nitems
4267 && linetable
->item
[idx
+1].line
!= 0
4268 && linetable
->item
[idx
+1].pc
== start_pc
)
4272 /* If there is only one sal that covers the entire function,
4273 then it is probably a single line function, like
4275 if (prologue_sal
.end
>= end_pc
)
4278 while (prologue_sal
.end
< end_pc
)
4280 struct symtab_and_line sal
;
4282 sal
= find_pc_line (prologue_sal
.end
, 0);
4285 /* Assume that a consecutive SAL for the same (or larger)
4286 line mark the prologue -> body transition. */
4287 if (sal
.line
>= prologue_sal
.line
)
4290 /* The line number is smaller. Check that it's from the
4291 same function, not something inlined. If it's inlined,
4292 then there is no point comparing the line numbers. */
4293 bl
= block_for_pc (prologue_sal
.end
);
4296 if (block_inlined_p (bl
))
4298 if (BLOCK_FUNCTION (bl
))
4303 bl
= BLOCK_SUPERBLOCK (bl
);
4308 /* The case in which compiler's optimizer/scheduler has
4309 moved instructions into the prologue. We look ahead in
4310 the function looking for address ranges whose
4311 corresponding line number is less the first one that we
4312 found for the function. This is more conservative then
4313 refine_prologue_limit which scans a large number of SALs
4314 looking for any in the prologue */
4319 if (prologue_sal
.end
< end_pc
)
4320 /* Return the end of this line, or zero if we could not find a
4322 return prologue_sal
.end
;
4324 /* Don't return END_PC, which is past the end of the function. */
4325 return prologue_sal
.pc
;
4328 struct symtabs_and_lines
4329 decode_line_spec (char *string
, int funfirstline
)
4331 struct symtabs_and_lines sals
;
4332 struct symtab_and_line cursal
;
4335 error (_("Empty line specification."));
4337 /* We use whatever is set as the current source line. We do not try
4338 and get a default or it will recursively call us! */
4339 cursal
= get_current_source_symtab_and_line ();
4341 sals
= decode_line_1 (&string
, funfirstline
,
4342 cursal
.symtab
, cursal
.line
,
4343 (char ***) NULL
, NULL
);
4346 error (_("Junk at end of line specification: %s"), string
);
4351 static char *name_of_main
;
4354 set_main_name (const char *name
)
4356 if (name_of_main
!= NULL
)
4358 xfree (name_of_main
);
4359 name_of_main
= NULL
;
4363 name_of_main
= xstrdup (name
);
4367 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4371 find_main_name (void)
4373 const char *new_main_name
;
4375 /* Try to see if the main procedure is in Ada. */
4376 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4377 be to add a new method in the language vector, and call this
4378 method for each language until one of them returns a non-empty
4379 name. This would allow us to remove this hard-coded call to
4380 an Ada function. It is not clear that this is a better approach
4381 at this point, because all methods need to be written in a way
4382 such that false positives never be returned. For instance, it is
4383 important that a method does not return a wrong name for the main
4384 procedure if the main procedure is actually written in a different
4385 language. It is easy to guaranty this with Ada, since we use a
4386 special symbol generated only when the main in Ada to find the name
4387 of the main procedure. It is difficult however to see how this can
4388 be guarantied for languages such as C, for instance. This suggests
4389 that order of call for these methods becomes important, which means
4390 a more complicated approach. */
4391 new_main_name
= ada_main_name ();
4392 if (new_main_name
!= NULL
)
4394 set_main_name (new_main_name
);
4398 new_main_name
= pascal_main_name ();
4399 if (new_main_name
!= NULL
)
4401 set_main_name (new_main_name
);
4405 /* The languages above didn't identify the name of the main procedure.
4406 Fallback to "main". */
4407 set_main_name ("main");
4413 if (name_of_main
== NULL
)
4416 return name_of_main
;
4419 /* Handle ``executable_changed'' events for the symtab module. */
4422 symtab_observer_executable_changed (void)
4424 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4425 set_main_name (NULL
);
4428 /* Helper to expand_line_sal below. Appends new sal to SAL,
4429 initializing it from SYMTAB, LINENO and PC. */
4431 append_expanded_sal (struct symtabs_and_lines
*sal
,
4432 struct program_space
*pspace
,
4433 struct symtab
*symtab
,
4434 int lineno
, CORE_ADDR pc
)
4436 sal
->sals
= xrealloc (sal
->sals
,
4437 sizeof (sal
->sals
[0])
4438 * (sal
->nelts
+ 1));
4439 init_sal (sal
->sals
+ sal
->nelts
);
4440 sal
->sals
[sal
->nelts
].pspace
= pspace
;
4441 sal
->sals
[sal
->nelts
].symtab
= symtab
;
4442 sal
->sals
[sal
->nelts
].section
= NULL
;
4443 sal
->sals
[sal
->nelts
].end
= 0;
4444 sal
->sals
[sal
->nelts
].line
= lineno
;
4445 sal
->sals
[sal
->nelts
].pc
= pc
;
4449 /* Helper to expand_line_sal below. Search in the symtabs for any
4450 linetable entry that exactly matches FULLNAME and LINENO and append
4451 them to RET. If FULLNAME is NULL or if a symtab has no full name,
4452 use FILENAME and LINENO instead. If there is at least one match,
4453 return 1; otherwise, return 0, and return the best choice in BEST_ITEM
4457 append_exact_match_to_sals (char *filename
, char *fullname
, int lineno
,
4458 struct symtabs_and_lines
*ret
,
4459 struct linetable_entry
**best_item
,
4460 struct symtab
**best_symtab
)
4462 struct program_space
*pspace
;
4463 struct objfile
*objfile
;
4464 struct symtab
*symtab
;
4470 ALL_PSPACES (pspace
)
4471 ALL_PSPACE_SYMTABS (pspace
, objfile
, symtab
)
4473 if (FILENAME_CMP (filename
, symtab
->filename
) == 0)
4475 struct linetable
*l
;
4478 if (fullname
!= NULL
4479 && symtab_to_fullname (symtab
) != NULL
4480 && FILENAME_CMP (fullname
, symtab
->fullname
) != 0)
4482 l
= LINETABLE (symtab
);
4487 for (j
= 0; j
< len
; j
++)
4489 struct linetable_entry
*item
= &(l
->item
[j
]);
4491 if (item
->line
== lineno
)
4494 append_expanded_sal (ret
, objfile
->pspace
,
4495 symtab
, lineno
, item
->pc
);
4497 else if (!exact
&& item
->line
> lineno
4498 && (*best_item
== NULL
4499 || item
->line
< (*best_item
)->line
))
4502 *best_symtab
= symtab
;
4510 /* Compute a set of all sals in all program spaces that correspond to
4511 same file and line as SAL and return those. If there are several
4512 sals that belong to the same block, only one sal for the block is
4513 included in results. */
4515 struct symtabs_and_lines
4516 expand_line_sal (struct symtab_and_line sal
)
4518 struct symtabs_and_lines ret
;
4520 struct objfile
*objfile
;
4523 struct block
**blocks
= NULL
;
4525 struct cleanup
*old_chain
;
4530 /* Only expand sals that represent file.c:line. */
4531 if (sal
.symtab
== NULL
|| sal
.line
== 0 || sal
.pc
!= 0)
4533 ret
.sals
= xmalloc (sizeof (struct symtab_and_line
));
4540 struct program_space
*pspace
;
4541 struct linetable_entry
*best_item
= 0;
4542 struct symtab
*best_symtab
= 0;
4544 char *match_filename
;
4547 match_filename
= sal
.symtab
->filename
;
4549 /* We need to find all symtabs for a file which name
4550 is described by sal. We cannot just directly
4551 iterate over symtabs, since a symtab might not be
4552 yet created. We also cannot iterate over psymtabs,
4553 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4554 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4555 corresponding to an included file. Therefore, we do
4556 first pass over psymtabs, reading in those with
4557 the right name. Then, we iterate over symtabs, knowing
4558 that all symtabs we're interested in are loaded. */
4560 old_chain
= save_current_program_space ();
4561 ALL_PSPACES (pspace
)
4563 set_current_program_space (pspace
);
4564 ALL_PSPACE_OBJFILES (pspace
, objfile
)
4567 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
4568 sal
.symtab
->filename
);
4571 do_cleanups (old_chain
);
4573 /* Now search the symtab for exact matches and append them. If
4574 none is found, append the best_item and all its exact
4576 symtab_to_fullname (sal
.symtab
);
4577 exact
= append_exact_match_to_sals (sal
.symtab
->filename
,
4578 sal
.symtab
->fullname
, lineno
,
4579 &ret
, &best_item
, &best_symtab
);
4580 if (!exact
&& best_item
)
4581 append_exact_match_to_sals (best_symtab
->filename
,
4582 best_symtab
->fullname
, best_item
->line
,
4583 &ret
, &best_item
, &best_symtab
);
4586 /* For optimized code, compiler can scatter one source line accross
4587 disjoint ranges of PC values, even when no duplicate functions
4588 or inline functions are involved. For example, 'for (;;)' inside
4589 non-template non-inline non-ctor-or-dtor function can result
4590 in two PC ranges. In this case, we don't want to set breakpoint
4591 on first PC of each range. To filter such cases, we use containing
4592 blocks -- for each PC found above we see if there are other PCs
4593 that are in the same block. If yes, the other PCs are filtered out. */
4595 old_chain
= save_current_program_space ();
4596 filter
= alloca (ret
.nelts
* sizeof (int));
4597 blocks
= alloca (ret
.nelts
* sizeof (struct block
*));
4598 for (i
= 0; i
< ret
.nelts
; ++i
)
4600 set_current_program_space (ret
.sals
[i
].pspace
);
4603 blocks
[i
] = block_for_pc_sect (ret
.sals
[i
].pc
, ret
.sals
[i
].section
);
4606 do_cleanups (old_chain
);
4608 for (i
= 0; i
< ret
.nelts
; ++i
)
4609 if (blocks
[i
] != NULL
)
4610 for (j
= i
+1; j
< ret
.nelts
; ++j
)
4611 if (blocks
[j
] == blocks
[i
])
4619 struct symtab_and_line
*final
=
4620 xmalloc (sizeof (struct symtab_and_line
) * (ret
.nelts
-deleted
));
4622 for (i
= 0, j
= 0; i
< ret
.nelts
; ++i
)
4624 final
[j
++] = ret
.sals
[i
];
4626 ret
.nelts
-= deleted
;
4634 /* Return 1 if the supplied producer string matches the ARM RealView
4635 compiler (armcc). */
4638 producer_is_realview (const char *producer
)
4640 static const char *const arm_idents
[] = {
4641 "ARM C Compiler, ADS",
4642 "Thumb C Compiler, ADS",
4643 "ARM C++ Compiler, ADS",
4644 "Thumb C++ Compiler, ADS",
4645 "ARM/Thumb C/C++ Compiler, RVCT",
4646 "ARM C/C++ Compiler, RVCT"
4650 if (producer
== NULL
)
4653 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4654 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4661 _initialize_symtab (void)
4663 add_info ("variables", variables_info
, _("\
4664 All global and static variable names, or those matching REGEXP."));
4666 add_com ("whereis", class_info
, variables_info
, _("\
4667 All global and static variable names, or those matching REGEXP."));
4669 add_info ("functions", functions_info
,
4670 _("All function names, or those matching REGEXP."));
4672 /* FIXME: This command has at least the following problems:
4673 1. It prints builtin types (in a very strange and confusing fashion).
4674 2. It doesn't print right, e.g. with
4675 typedef struct foo *FOO
4676 type_print prints "FOO" when we want to make it (in this situation)
4677 print "struct foo *".
4678 I also think "ptype" or "whatis" is more likely to be useful (but if
4679 there is much disagreement "info types" can be fixed). */
4680 add_info ("types", types_info
,
4681 _("All type names, or those matching REGEXP."));
4683 add_info ("sources", sources_info
,
4684 _("Source files in the program."));
4686 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4687 _("Set a breakpoint for all functions matching REGEXP."));
4691 add_com ("lf", class_info
, sources_info
,
4692 _("Source files in the program"));
4693 add_com ("lg", class_info
, variables_info
, _("\
4694 All global and static variable names, or those matching REGEXP."));
4697 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4698 multiple_symbols_modes
, &multiple_symbols_mode
,
4700 Set the debugger behavior when more than one symbol are possible matches\n\
4701 in an expression."), _("\
4702 Show how the debugger handles ambiguities in expressions."), _("\
4703 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4704 NULL
, NULL
, &setlist
, &showlist
);
4706 observer_attach_executable_changed (symtab_observer_executable_changed
);