1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2014 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "gdb_regex.h"
31 #include "expression.h"
36 #include "filenames.h" /* for FILENAME_CMP */
37 #include "objc-lang.h"
43 #include "cli/cli-utils.h"
47 #include "gdb_obstack.h"
49 #include "dictionary.h"
51 #include <sys/types.h>
57 #include "cp-support.h"
59 #include "gdb_assert.h"
62 #include "macroscope.h"
64 #include "parser-defs.h"
66 /* Prototypes for local functions */
68 static void rbreak_command (char *, int);
70 static void types_info (char *, int);
72 static void functions_info (char *, int);
74 static void variables_info (char *, int);
76 static void sources_info (char *, int);
78 static int find_line_common (struct linetable
*, int, int *, int);
80 static struct symbol
*lookup_symbol_aux (const char *name
,
81 const struct block
*block
,
82 const domain_enum domain
,
83 enum language language
,
84 struct field_of_this_result
*is_a_field_of_this
);
87 struct symbol
*lookup_symbol_aux_local (const char *name
,
88 const struct block
*block
,
89 const domain_enum domain
,
90 enum language language
);
93 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
95 const domain_enum domain
);
98 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
101 const domain_enum domain
);
103 void _initialize_symtab (void);
107 /* When non-zero, print debugging messages related to symtab creation. */
108 unsigned int symtab_create_debug
= 0;
110 /* Non-zero if a file may be known by two different basenames.
111 This is the uncommon case, and significantly slows down gdb.
112 Default set to "off" to not slow down the common case. */
113 int basenames_may_differ
= 0;
115 /* Allow the user to configure the debugger behavior with respect
116 to multiple-choice menus when more than one symbol matches during
119 const char multiple_symbols_ask
[] = "ask";
120 const char multiple_symbols_all
[] = "all";
121 const char multiple_symbols_cancel
[] = "cancel";
122 static const char *const multiple_symbols_modes
[] =
124 multiple_symbols_ask
,
125 multiple_symbols_all
,
126 multiple_symbols_cancel
,
129 static const char *multiple_symbols_mode
= multiple_symbols_all
;
131 /* Read-only accessor to AUTO_SELECT_MODE. */
134 multiple_symbols_select_mode (void)
136 return multiple_symbols_mode
;
139 /* Block in which the most recently searched-for symbol was found.
140 Might be better to make this a parameter to lookup_symbol and
143 const struct block
*block_found
;
145 /* Return the name of a domain_enum. */
148 domain_name (domain_enum e
)
152 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
153 case VAR_DOMAIN
: return "VAR_DOMAIN";
154 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
155 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
156 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
157 default: gdb_assert_not_reached ("bad domain_enum");
161 /* Return the name of a search_domain . */
164 search_domain_name (enum search_domain e
)
168 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
169 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
170 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
171 case ALL_DOMAIN
: return "ALL_DOMAIN";
172 default: gdb_assert_not_reached ("bad search_domain");
176 /* Set the primary field in SYMTAB. */
179 set_symtab_primary (struct symtab
*symtab
, int primary
)
181 symtab
->primary
= primary
;
183 if (symtab_create_debug
&& primary
)
185 fprintf_unfiltered (gdb_stdlog
,
186 "Created primary symtab %s for %s.\n",
187 host_address_to_string (symtab
),
188 symtab_to_filename_for_display (symtab
));
192 /* See whether FILENAME matches SEARCH_NAME using the rule that we
193 advertise to the user. (The manual's description of linespecs
194 describes what we advertise). Returns true if they match, false
198 compare_filenames_for_search (const char *filename
, const char *search_name
)
200 int len
= strlen (filename
);
201 size_t search_len
= strlen (search_name
);
203 if (len
< search_len
)
206 /* The tail of FILENAME must match. */
207 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
210 /* Either the names must completely match, or the character
211 preceding the trailing SEARCH_NAME segment of FILENAME must be a
214 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
215 cannot match FILENAME "/path//dir/file.c" - as user has requested
216 absolute path. The sama applies for "c:\file.c" possibly
217 incorrectly hypothetically matching "d:\dir\c:\file.c".
219 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
220 compatible with SEARCH_NAME "file.c". In such case a compiler had
221 to put the "c:file.c" name into debug info. Such compatibility
222 works only on GDB built for DOS host. */
223 return (len
== search_len
224 || (!IS_ABSOLUTE_PATH (search_name
)
225 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
226 || (HAS_DRIVE_SPEC (filename
)
227 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
230 /* Check for a symtab of a specific name by searching some symtabs.
231 This is a helper function for callbacks of iterate_over_symtabs.
233 If NAME is not absolute, then REAL_PATH is NULL
234 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
236 The return value, NAME, REAL_PATH, CALLBACK, and DATA
237 are identical to the `map_symtabs_matching_filename' method of
238 quick_symbol_functions.
240 FIRST and AFTER_LAST indicate the range of symtabs to search.
241 AFTER_LAST is one past the last symtab to search; NULL means to
242 search until the end of the list. */
245 iterate_over_some_symtabs (const char *name
,
246 const char *real_path
,
247 int (*callback
) (struct symtab
*symtab
,
250 struct symtab
*first
,
251 struct symtab
*after_last
)
253 struct symtab
*s
= NULL
;
254 const char* base_name
= lbasename (name
);
256 for (s
= first
; s
!= NULL
&& s
!= after_last
; s
= s
->next
)
258 if (compare_filenames_for_search (s
->filename
, name
))
260 if (callback (s
, data
))
265 /* Before we invoke realpath, which can get expensive when many
266 files are involved, do a quick comparison of the basenames. */
267 if (! basenames_may_differ
268 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
271 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
273 if (callback (s
, data
))
278 /* If the user gave us an absolute path, try to find the file in
279 this symtab and use its absolute path. */
280 if (real_path
!= NULL
)
282 const char *fullname
= symtab_to_fullname (s
);
284 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
285 gdb_assert (IS_ABSOLUTE_PATH (name
));
286 if (FILENAME_CMP (real_path
, fullname
) == 0)
288 if (callback (s
, data
))
298 /* Check for a symtab of a specific name; first in symtabs, then in
299 psymtabs. *If* there is no '/' in the name, a match after a '/'
300 in the symtab filename will also work.
302 Calls CALLBACK with each symtab that is found and with the supplied
303 DATA. If CALLBACK returns true, the search stops. */
306 iterate_over_symtabs (const char *name
,
307 int (*callback
) (struct symtab
*symtab
,
311 struct objfile
*objfile
;
312 char *real_path
= NULL
;
313 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
315 /* Here we are interested in canonicalizing an absolute path, not
316 absolutizing a relative path. */
317 if (IS_ABSOLUTE_PATH (name
))
319 real_path
= gdb_realpath (name
);
320 make_cleanup (xfree
, real_path
);
321 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
324 ALL_OBJFILES (objfile
)
326 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
327 objfile
->symtabs
, NULL
))
329 do_cleanups (cleanups
);
334 /* Same search rules as above apply here, but now we look thru the
337 ALL_OBJFILES (objfile
)
340 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
346 do_cleanups (cleanups
);
351 do_cleanups (cleanups
);
354 /* The callback function used by lookup_symtab. */
357 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
359 struct symtab
**result_ptr
= data
;
361 *result_ptr
= symtab
;
365 /* A wrapper for iterate_over_symtabs that returns the first matching
369 lookup_symtab (const char *name
)
371 struct symtab
*result
= NULL
;
373 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
378 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
379 full method name, which consist of the class name (from T), the unadorned
380 method name from METHOD_ID, and the signature for the specific overload,
381 specified by SIGNATURE_ID. Note that this function is g++ specific. */
384 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
386 int mangled_name_len
;
388 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
389 struct fn_field
*method
= &f
[signature_id
];
390 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
391 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
392 const char *newname
= type_name_no_tag (type
);
394 /* Does the form of physname indicate that it is the full mangled name
395 of a constructor (not just the args)? */
396 int is_full_physname_constructor
;
399 int is_destructor
= is_destructor_name (physname
);
400 /* Need a new type prefix. */
401 char *const_prefix
= method
->is_const
? "C" : "";
402 char *volatile_prefix
= method
->is_volatile
? "V" : "";
404 int len
= (newname
== NULL
? 0 : strlen (newname
));
406 /* Nothing to do if physname already contains a fully mangled v3 abi name
407 or an operator name. */
408 if ((physname
[0] == '_' && physname
[1] == 'Z')
409 || is_operator_name (field_name
))
410 return xstrdup (physname
);
412 is_full_physname_constructor
= is_constructor_name (physname
);
414 is_constructor
= is_full_physname_constructor
415 || (newname
&& strcmp (field_name
, newname
) == 0);
418 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
420 if (is_destructor
|| is_full_physname_constructor
)
422 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
423 strcpy (mangled_name
, physname
);
429 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
431 else if (physname
[0] == 't' || physname
[0] == 'Q')
433 /* The physname for template and qualified methods already includes
435 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
441 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
442 volatile_prefix
, len
);
444 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
445 + strlen (buf
) + len
+ strlen (physname
) + 1);
447 mangled_name
= (char *) xmalloc (mangled_name_len
);
449 mangled_name
[0] = '\0';
451 strcpy (mangled_name
, field_name
);
453 strcat (mangled_name
, buf
);
454 /* If the class doesn't have a name, i.e. newname NULL, then we just
455 mangle it using 0 for the length of the class. Thus it gets mangled
456 as something starting with `::' rather than `classname::'. */
458 strcat (mangled_name
, newname
);
460 strcat (mangled_name
, physname
);
461 return (mangled_name
);
464 /* Initialize the cplus_specific structure. 'cplus_specific' should
465 only be allocated for use with cplus symbols. */
468 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
469 struct obstack
*obstack
)
471 /* A language_specific structure should not have been previously
473 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
474 gdb_assert (obstack
!= NULL
);
476 gsymbol
->language_specific
.cplus_specific
=
477 OBSTACK_ZALLOC (obstack
, struct cplus_specific
);
480 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
481 correctly allocated. For C++ symbols a cplus_specific struct is
482 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
483 OBJFILE can be NULL. */
486 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
488 struct obstack
*obstack
)
490 if (gsymbol
->language
== language_cplus
)
492 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
493 symbol_init_cplus_specific (gsymbol
, obstack
);
495 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
497 else if (gsymbol
->language
== language_ada
)
501 gsymbol
->ada_mangled
= 0;
502 gsymbol
->language_specific
.obstack
= obstack
;
506 gsymbol
->ada_mangled
= 1;
507 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
511 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
514 /* Return the demangled name of GSYMBOL. */
517 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
519 if (gsymbol
->language
== language_cplus
)
521 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
522 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
526 else if (gsymbol
->language
== language_ada
)
528 if (!gsymbol
->ada_mangled
)
533 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
537 /* Initialize the language dependent portion of a symbol
538 depending upon the language for the symbol. */
541 symbol_set_language (struct general_symbol_info
*gsymbol
,
542 enum language language
,
543 struct obstack
*obstack
)
545 gsymbol
->language
= language
;
546 if (gsymbol
->language
== language_d
547 || gsymbol
->language
== language_go
548 || gsymbol
->language
== language_java
549 || gsymbol
->language
== language_objc
550 || gsymbol
->language
== language_fortran
)
552 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
554 else if (gsymbol
->language
== language_ada
)
556 gdb_assert (gsymbol
->ada_mangled
== 0);
557 gsymbol
->language_specific
.obstack
= obstack
;
559 else if (gsymbol
->language
== language_cplus
)
560 gsymbol
->language_specific
.cplus_specific
= NULL
;
563 memset (&gsymbol
->language_specific
, 0,
564 sizeof (gsymbol
->language_specific
));
568 /* Functions to initialize a symbol's mangled name. */
570 /* Objects of this type are stored in the demangled name hash table. */
571 struct demangled_name_entry
577 /* Hash function for the demangled name hash. */
580 hash_demangled_name_entry (const void *data
)
582 const struct demangled_name_entry
*e
= data
;
584 return htab_hash_string (e
->mangled
);
587 /* Equality function for the demangled name hash. */
590 eq_demangled_name_entry (const void *a
, const void *b
)
592 const struct demangled_name_entry
*da
= a
;
593 const struct demangled_name_entry
*db
= b
;
595 return strcmp (da
->mangled
, db
->mangled
) == 0;
598 /* Create the hash table used for demangled names. Each hash entry is
599 a pair of strings; one for the mangled name and one for the demangled
600 name. The entry is hashed via just the mangled name. */
603 create_demangled_names_hash (struct objfile
*objfile
)
605 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
606 The hash table code will round this up to the next prime number.
607 Choosing a much larger table size wastes memory, and saves only about
608 1% in symbol reading. */
610 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
611 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
612 NULL
, xcalloc
, xfree
);
615 /* Try to determine the demangled name for a symbol, based on the
616 language of that symbol. If the language is set to language_auto,
617 it will attempt to find any demangling algorithm that works and
618 then set the language appropriately. The returned name is allocated
619 by the demangler and should be xfree'd. */
622 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
625 char *demangled
= NULL
;
627 if (gsymbol
->language
== language_unknown
)
628 gsymbol
->language
= language_auto
;
630 if (gsymbol
->language
== language_objc
631 || gsymbol
->language
== language_auto
)
634 objc_demangle (mangled
, 0);
635 if (demangled
!= NULL
)
637 gsymbol
->language
= language_objc
;
641 if (gsymbol
->language
== language_cplus
642 || gsymbol
->language
== language_auto
)
645 gdb_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
646 if (demangled
!= NULL
)
648 gsymbol
->language
= language_cplus
;
652 if (gsymbol
->language
== language_java
)
655 gdb_demangle (mangled
,
656 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
657 if (demangled
!= NULL
)
659 gsymbol
->language
= language_java
;
663 if (gsymbol
->language
== language_d
664 || gsymbol
->language
== language_auto
)
666 demangled
= d_demangle(mangled
, 0);
667 if (demangled
!= NULL
)
669 gsymbol
->language
= language_d
;
673 /* FIXME(dje): Continually adding languages here is clumsy.
674 Better to just call la_demangle if !auto, and if auto then call
675 a utility routine that tries successive languages in turn and reports
676 which one it finds. I realize the la_demangle options may be different
677 for different languages but there's already a FIXME for that. */
678 if (gsymbol
->language
== language_go
679 || gsymbol
->language
== language_auto
)
681 demangled
= go_demangle (mangled
, 0);
682 if (demangled
!= NULL
)
684 gsymbol
->language
= language_go
;
689 /* We could support `gsymbol->language == language_fortran' here to provide
690 module namespaces also for inferiors with only minimal symbol table (ELF
691 symbols). Just the mangling standard is not standardized across compilers
692 and there is no DW_AT_producer available for inferiors with only the ELF
693 symbols to check the mangling kind. */
695 /* Check for Ada symbols last. See comment below explaining why. */
697 if (gsymbol
->language
== language_auto
)
699 const char *demangled
= ada_decode (mangled
);
701 if (demangled
!= mangled
&& demangled
!= NULL
&& demangled
[0] != '<')
703 /* Set the gsymbol language to Ada, but still return NULL.
704 Two reasons for that:
706 1. For Ada, we prefer computing the symbol's decoded name
707 on the fly rather than pre-compute it, in order to save
708 memory (Ada projects are typically very large).
710 2. There are some areas in the definition of the GNAT
711 encoding where, with a bit of bad luck, we might be able
712 to decode a non-Ada symbol, generating an incorrect
713 demangled name (Eg: names ending with "TB" for instance
714 are identified as task bodies and so stripped from
715 the decoded name returned).
717 Returning NULL, here, helps us get a little bit of
718 the best of both worlds. Because we're last, we should
719 not affect any of the other languages that were able to
720 demangle the symbol before us; we get to correctly tag
721 Ada symbols as such; and even if we incorrectly tagged
722 a non-Ada symbol, which should be rare, any routing
723 through the Ada language should be transparent (Ada
724 tries to behave much like C/C++ with non-Ada symbols). */
725 gsymbol
->language
= language_ada
;
733 /* Set both the mangled and demangled (if any) names for GSYMBOL based
734 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
735 objfile's obstack; but if COPY_NAME is 0 and if NAME is
736 NUL-terminated, then this function assumes that NAME is already
737 correctly saved (either permanently or with a lifetime tied to the
738 objfile), and it will not be copied.
740 The hash table corresponding to OBJFILE is used, and the memory
741 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
742 so the pointer can be discarded after calling this function. */
744 /* We have to be careful when dealing with Java names: when we run
745 into a Java minimal symbol, we don't know it's a Java symbol, so it
746 gets demangled as a C++ name. This is unfortunate, but there's not
747 much we can do about it: but when demangling partial symbols and
748 regular symbols, we'd better not reuse the wrong demangled name.
749 (See PR gdb/1039.) We solve this by putting a distinctive prefix
750 on Java names when storing them in the hash table. */
752 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
753 don't mind the Java prefix so much: different languages have
754 different demangling requirements, so it's only natural that we
755 need to keep language data around in our demangling cache. But
756 it's not good that the minimal symbol has the wrong demangled name.
757 Unfortunately, I can't think of any easy solution to that
760 #define JAVA_PREFIX "##JAVA$$"
761 #define JAVA_PREFIX_LEN 8
764 symbol_set_names (struct general_symbol_info
*gsymbol
,
765 const char *linkage_name
, int len
, int copy_name
,
766 struct objfile
*objfile
)
768 struct demangled_name_entry
**slot
;
769 /* A 0-terminated copy of the linkage name. */
770 const char *linkage_name_copy
;
771 /* A copy of the linkage name that might have a special Java prefix
772 added to it, for use when looking names up in the hash table. */
773 const char *lookup_name
;
774 /* The length of lookup_name. */
776 struct demangled_name_entry entry
;
777 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
779 if (gsymbol
->language
== language_ada
)
781 /* In Ada, we do the symbol lookups using the mangled name, so
782 we can save some space by not storing the demangled name.
784 As a side note, we have also observed some overlap between
785 the C++ mangling and Ada mangling, similarly to what has
786 been observed with Java. Because we don't store the demangled
787 name with the symbol, we don't need to use the same trick
790 gsymbol
->name
= linkage_name
;
793 char *name
= obstack_alloc (&per_bfd
->storage_obstack
, len
+ 1);
795 memcpy (name
, linkage_name
, len
);
797 gsymbol
->name
= name
;
799 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
804 if (per_bfd
->demangled_names_hash
== NULL
)
805 create_demangled_names_hash (objfile
);
807 /* The stabs reader generally provides names that are not
808 NUL-terminated; most of the other readers don't do this, so we
809 can just use the given copy, unless we're in the Java case. */
810 if (gsymbol
->language
== language_java
)
814 lookup_len
= len
+ JAVA_PREFIX_LEN
;
815 alloc_name
= alloca (lookup_len
+ 1);
816 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
817 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
818 alloc_name
[lookup_len
] = '\0';
820 lookup_name
= alloc_name
;
821 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
823 else if (linkage_name
[len
] != '\0')
828 alloc_name
= alloca (lookup_len
+ 1);
829 memcpy (alloc_name
, linkage_name
, len
);
830 alloc_name
[lookup_len
] = '\0';
832 lookup_name
= alloc_name
;
833 linkage_name_copy
= alloc_name
;
838 lookup_name
= linkage_name
;
839 linkage_name_copy
= linkage_name
;
842 entry
.mangled
= lookup_name
;
843 slot
= ((struct demangled_name_entry
**)
844 htab_find_slot (per_bfd
->demangled_names_hash
,
847 /* If this name is not in the hash table, add it. */
849 /* A C version of the symbol may have already snuck into the table.
850 This happens to, e.g., main.init (__go_init_main). Cope. */
851 || (gsymbol
->language
== language_go
852 && (*slot
)->demangled
[0] == '\0'))
854 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
856 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
858 /* Suppose we have demangled_name==NULL, copy_name==0, and
859 lookup_name==linkage_name. In this case, we already have the
860 mangled name saved, and we don't have a demangled name. So,
861 you might think we could save a little space by not recording
862 this in the hash table at all.
864 It turns out that it is actually important to still save such
865 an entry in the hash table, because storing this name gives
866 us better bcache hit rates for partial symbols. */
867 if (!copy_name
&& lookup_name
== linkage_name
)
869 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
870 offsetof (struct demangled_name_entry
,
872 + demangled_len
+ 1);
873 (*slot
)->mangled
= lookup_name
;
879 /* If we must copy the mangled name, put it directly after
880 the demangled name so we can have a single
882 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
883 offsetof (struct demangled_name_entry
,
885 + lookup_len
+ demangled_len
+ 2);
886 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
887 strcpy (mangled_ptr
, lookup_name
);
888 (*slot
)->mangled
= mangled_ptr
;
891 if (demangled_name
!= NULL
)
893 strcpy ((*slot
)->demangled
, demangled_name
);
894 xfree (demangled_name
);
897 (*slot
)->demangled
[0] = '\0';
900 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
901 if ((*slot
)->demangled
[0] != '\0')
902 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
903 &per_bfd
->storage_obstack
);
905 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
908 /* Return the source code name of a symbol. In languages where
909 demangling is necessary, this is the demangled name. */
912 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
914 switch (gsymbol
->language
)
921 case language_fortran
:
922 if (symbol_get_demangled_name (gsymbol
) != NULL
)
923 return symbol_get_demangled_name (gsymbol
);
926 return ada_decode_symbol (gsymbol
);
930 return gsymbol
->name
;
933 /* Return the demangled name for a symbol based on the language for
934 that symbol. If no demangled name exists, return NULL. */
937 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
939 const char *dem_name
= NULL
;
941 switch (gsymbol
->language
)
948 case language_fortran
:
949 dem_name
= symbol_get_demangled_name (gsymbol
);
952 dem_name
= ada_decode_symbol (gsymbol
);
960 /* Return the search name of a symbol---generally the demangled or
961 linkage name of the symbol, depending on how it will be searched for.
962 If there is no distinct demangled name, then returns the same value
963 (same pointer) as SYMBOL_LINKAGE_NAME. */
966 symbol_search_name (const struct general_symbol_info
*gsymbol
)
968 if (gsymbol
->language
== language_ada
)
969 return gsymbol
->name
;
971 return symbol_natural_name (gsymbol
);
974 /* Initialize the structure fields to zero values. */
977 init_sal (struct symtab_and_line
*sal
)
985 sal
->explicit_pc
= 0;
986 sal
->explicit_line
= 0;
991 /* Return 1 if the two sections are the same, or if they could
992 plausibly be copies of each other, one in an original object
993 file and another in a separated debug file. */
996 matching_obj_sections (struct obj_section
*obj_first
,
997 struct obj_section
*obj_second
)
999 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
1000 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1001 struct objfile
*obj
;
1003 /* If they're the same section, then they match. */
1004 if (first
== second
)
1007 /* If either is NULL, give up. */
1008 if (first
== NULL
|| second
== NULL
)
1011 /* This doesn't apply to absolute symbols. */
1012 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1015 /* If they're in the same object file, they must be different sections. */
1016 if (first
->owner
== second
->owner
)
1019 /* Check whether the two sections are potentially corresponding. They must
1020 have the same size, address, and name. We can't compare section indexes,
1021 which would be more reliable, because some sections may have been
1023 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
1026 /* In-memory addresses may start at a different offset, relativize them. */
1027 if (bfd_get_section_vma (first
->owner
, first
)
1028 - bfd_get_start_address (first
->owner
)
1029 != bfd_get_section_vma (second
->owner
, second
)
1030 - bfd_get_start_address (second
->owner
))
1033 if (bfd_get_section_name (first
->owner
, first
) == NULL
1034 || bfd_get_section_name (second
->owner
, second
) == NULL
1035 || strcmp (bfd_get_section_name (first
->owner
, first
),
1036 bfd_get_section_name (second
->owner
, second
)) != 0)
1039 /* Otherwise check that they are in corresponding objfiles. */
1042 if (obj
->obfd
== first
->owner
)
1044 gdb_assert (obj
!= NULL
);
1046 if (obj
->separate_debug_objfile
!= NULL
1047 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1049 if (obj
->separate_debug_objfile_backlink
!= NULL
1050 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1057 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
1059 struct objfile
*objfile
;
1060 struct minimal_symbol
*msymbol
;
1062 /* If we know that this is not a text address, return failure. This is
1063 necessary because we loop based on texthigh and textlow, which do
1064 not include the data ranges. */
1065 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
;
1067 && (MSYMBOL_TYPE (msymbol
) == mst_data
1068 || MSYMBOL_TYPE (msymbol
) == mst_bss
1069 || MSYMBOL_TYPE (msymbol
) == mst_abs
1070 || MSYMBOL_TYPE (msymbol
) == mst_file_data
1071 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
1074 ALL_OBJFILES (objfile
)
1076 struct symtab
*result
= NULL
;
1079 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
1088 /* Debug symbols usually don't have section information. We need to dig that
1089 out of the minimal symbols and stash that in the debug symbol. */
1092 fixup_section (struct general_symbol_info
*ginfo
,
1093 CORE_ADDR addr
, struct objfile
*objfile
)
1095 struct minimal_symbol
*msym
;
1097 /* First, check whether a minimal symbol with the same name exists
1098 and points to the same address. The address check is required
1099 e.g. on PowerPC64, where the minimal symbol for a function will
1100 point to the function descriptor, while the debug symbol will
1101 point to the actual function code. */
1102 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1104 ginfo
->section
= SYMBOL_SECTION (msym
);
1107 /* Static, function-local variables do appear in the linker
1108 (minimal) symbols, but are frequently given names that won't
1109 be found via lookup_minimal_symbol(). E.g., it has been
1110 observed in frv-uclinux (ELF) executables that a static,
1111 function-local variable named "foo" might appear in the
1112 linker symbols as "foo.6" or "foo.3". Thus, there is no
1113 point in attempting to extend the lookup-by-name mechanism to
1114 handle this case due to the fact that there can be multiple
1117 So, instead, search the section table when lookup by name has
1118 failed. The ``addr'' and ``endaddr'' fields may have already
1119 been relocated. If so, the relocation offset (i.e. the
1120 ANOFFSET value) needs to be subtracted from these values when
1121 performing the comparison. We unconditionally subtract it,
1122 because, when no relocation has been performed, the ANOFFSET
1123 value will simply be zero.
1125 The address of the symbol whose section we're fixing up HAS
1126 NOT BEEN adjusted (relocated) yet. It can't have been since
1127 the section isn't yet known and knowing the section is
1128 necessary in order to add the correct relocation value. In
1129 other words, we wouldn't even be in this function (attempting
1130 to compute the section) if it were already known.
1132 Note that it is possible to search the minimal symbols
1133 (subtracting the relocation value if necessary) to find the
1134 matching minimal symbol, but this is overkill and much less
1135 efficient. It is not necessary to find the matching minimal
1136 symbol, only its section.
1138 Note that this technique (of doing a section table search)
1139 can fail when unrelocated section addresses overlap. For
1140 this reason, we still attempt a lookup by name prior to doing
1141 a search of the section table. */
1143 struct obj_section
*s
;
1146 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1148 int idx
= s
- objfile
->sections
;
1149 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1154 if (obj_section_addr (s
) - offset
<= addr
1155 && addr
< obj_section_endaddr (s
) - offset
)
1157 ginfo
->section
= idx
;
1162 /* If we didn't find the section, assume it is in the first
1163 section. If there is no allocated section, then it hardly
1164 matters what we pick, so just pick zero. */
1168 ginfo
->section
= fallback
;
1173 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1180 /* We either have an OBJFILE, or we can get at it from the sym's
1181 symtab. Anything else is a bug. */
1182 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1184 if (objfile
== NULL
)
1185 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1187 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1190 /* We should have an objfile by now. */
1191 gdb_assert (objfile
);
1193 switch (SYMBOL_CLASS (sym
))
1197 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1200 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1204 /* Nothing else will be listed in the minsyms -- no use looking
1209 fixup_section (&sym
->ginfo
, addr
, objfile
);
1214 /* Compute the demangled form of NAME as used by the various symbol
1215 lookup functions. The result is stored in *RESULT_NAME. Returns a
1216 cleanup which can be used to clean up the result.
1218 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1219 Normally, Ada symbol lookups are performed using the encoded name
1220 rather than the demangled name, and so it might seem to make sense
1221 for this function to return an encoded version of NAME.
1222 Unfortunately, we cannot do this, because this function is used in
1223 circumstances where it is not appropriate to try to encode NAME.
1224 For instance, when displaying the frame info, we demangle the name
1225 of each parameter, and then perform a symbol lookup inside our
1226 function using that demangled name. In Ada, certain functions
1227 have internally-generated parameters whose name contain uppercase
1228 characters. Encoding those name would result in those uppercase
1229 characters to become lowercase, and thus cause the symbol lookup
1233 demangle_for_lookup (const char *name
, enum language lang
,
1234 const char **result_name
)
1236 char *demangled_name
= NULL
;
1237 const char *modified_name
= NULL
;
1238 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1240 modified_name
= name
;
1242 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1243 lookup, so we can always binary search. */
1244 if (lang
== language_cplus
)
1246 demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1249 modified_name
= demangled_name
;
1250 make_cleanup (xfree
, demangled_name
);
1254 /* If we were given a non-mangled name, canonicalize it
1255 according to the language (so far only for C++). */
1256 demangled_name
= cp_canonicalize_string (name
);
1259 modified_name
= demangled_name
;
1260 make_cleanup (xfree
, demangled_name
);
1264 else if (lang
== language_java
)
1266 demangled_name
= gdb_demangle (name
,
1267 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1270 modified_name
= demangled_name
;
1271 make_cleanup (xfree
, demangled_name
);
1274 else if (lang
== language_d
)
1276 demangled_name
= d_demangle (name
, 0);
1279 modified_name
= demangled_name
;
1280 make_cleanup (xfree
, demangled_name
);
1283 else if (lang
== language_go
)
1285 demangled_name
= go_demangle (name
, 0);
1288 modified_name
= demangled_name
;
1289 make_cleanup (xfree
, demangled_name
);
1293 *result_name
= modified_name
;
1297 /* Find the definition for a specified symbol name NAME
1298 in domain DOMAIN, visible from lexical block BLOCK.
1299 Returns the struct symbol pointer, or zero if no symbol is found.
1300 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1301 NAME is a field of the current implied argument `this'. If so set
1302 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1303 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1304 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1306 /* This function (or rather its subordinates) have a bunch of loops and
1307 it would seem to be attractive to put in some QUIT's (though I'm not really
1308 sure whether it can run long enough to be really important). But there
1309 are a few calls for which it would appear to be bad news to quit
1310 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1311 that there is C++ code below which can error(), but that probably
1312 doesn't affect these calls since they are looking for a known
1313 variable and thus can probably assume it will never hit the C++
1317 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1318 const domain_enum domain
, enum language lang
,
1319 struct field_of_this_result
*is_a_field_of_this
)
1321 const char *modified_name
;
1322 struct symbol
*returnval
;
1323 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1325 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1326 is_a_field_of_this
);
1327 do_cleanups (cleanup
);
1332 /* Behave like lookup_symbol_in_language, but performed with the
1333 current language. */
1336 lookup_symbol (const char *name
, const struct block
*block
,
1338 struct field_of_this_result
*is_a_field_of_this
)
1340 return lookup_symbol_in_language (name
, block
, domain
,
1341 current_language
->la_language
,
1342 is_a_field_of_this
);
1345 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1346 found, or NULL if not found. */
1349 lookup_language_this (const struct language_defn
*lang
,
1350 const struct block
*block
)
1352 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1359 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1362 block_found
= block
;
1365 if (BLOCK_FUNCTION (block
))
1367 block
= BLOCK_SUPERBLOCK (block
);
1373 /* Given TYPE, a structure/union,
1374 return 1 if the component named NAME from the ultimate target
1375 structure/union is defined, otherwise, return 0. */
1378 check_field (struct type
*type
, const char *name
,
1379 struct field_of_this_result
*is_a_field_of_this
)
1383 /* The type may be a stub. */
1384 CHECK_TYPEDEF (type
);
1386 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1388 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1390 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1392 is_a_field_of_this
->type
= type
;
1393 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1398 /* C++: If it was not found as a data field, then try to return it
1399 as a pointer to a method. */
1401 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1403 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1405 is_a_field_of_this
->type
= type
;
1406 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1411 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1412 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
1418 /* Behave like lookup_symbol except that NAME is the natural name
1419 (e.g., demangled name) of the symbol that we're looking for. */
1421 static struct symbol
*
1422 lookup_symbol_aux (const char *name
, const struct block
*block
,
1423 const domain_enum domain
, enum language language
,
1424 struct field_of_this_result
*is_a_field_of_this
)
1427 const struct language_defn
*langdef
;
1429 /* Make sure we do something sensible with is_a_field_of_this, since
1430 the callers that set this parameter to some non-null value will
1431 certainly use it later. If we don't set it, the contents of
1432 is_a_field_of_this are undefined. */
1433 if (is_a_field_of_this
!= NULL
)
1434 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
1436 /* Search specified block and its superiors. Don't search
1437 STATIC_BLOCK or GLOBAL_BLOCK. */
1439 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1443 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1444 check to see if NAME is a field of `this'. */
1446 langdef
= language_def (language
);
1448 /* Don't do this check if we are searching for a struct. It will
1449 not be found by check_field, but will be found by other
1451 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
1453 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1457 struct type
*t
= sym
->type
;
1459 /* I'm not really sure that type of this can ever
1460 be typedefed; just be safe. */
1462 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1463 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1464 t
= TYPE_TARGET_TYPE (t
);
1466 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1467 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1468 error (_("Internal error: `%s' is not an aggregate"),
1469 langdef
->la_name_of_this
);
1471 if (check_field (t
, name
, is_a_field_of_this
))
1476 /* Now do whatever is appropriate for LANGUAGE to look
1477 up static and global variables. */
1479 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1483 /* Now search all static file-level symbols. Not strictly correct,
1484 but more useful than an error. */
1486 return lookup_static_symbol_aux (name
, domain
);
1489 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1490 first, then check the psymtabs. If a psymtab indicates the existence of the
1491 desired name as a file-level static, then do psymtab-to-symtab conversion on
1492 the fly and return the found symbol. */
1495 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1497 struct objfile
*objfile
;
1500 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1504 ALL_OBJFILES (objfile
)
1506 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1514 /* Check to see if the symbol is defined in BLOCK or its superiors.
1515 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1517 static struct symbol
*
1518 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1519 const domain_enum domain
,
1520 enum language language
)
1523 const struct block
*static_block
= block_static_block (block
);
1524 const char *scope
= block_scope (block
);
1526 /* Check if either no block is specified or it's a global block. */
1528 if (static_block
== NULL
)
1531 while (block
!= static_block
)
1533 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1537 if (language
== language_cplus
|| language
== language_fortran
)
1539 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1545 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1547 block
= BLOCK_SUPERBLOCK (block
);
1550 /* We've reached the edge of the function without finding a result. */
1555 /* Look up OBJFILE to BLOCK. */
1558 lookup_objfile_from_block (const struct block
*block
)
1560 struct objfile
*obj
;
1566 block
= block_global_block (block
);
1567 /* Go through SYMTABS. */
1568 ALL_SYMTABS (obj
, s
)
1569 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1571 if (obj
->separate_debug_objfile_backlink
)
1572 obj
= obj
->separate_debug_objfile_backlink
;
1580 /* Look up a symbol in a block; if found, fixup the symbol, and set
1581 block_found appropriately. */
1584 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1585 const domain_enum domain
)
1589 sym
= lookup_block_symbol (block
, name
, domain
);
1592 block_found
= block
;
1593 return fixup_symbol_section (sym
, NULL
);
1599 /* Check all global symbols in OBJFILE in symtabs and
1603 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1605 const domain_enum domain
)
1607 const struct objfile
*objfile
;
1609 struct blockvector
*bv
;
1610 const struct block
*block
;
1613 for (objfile
= main_objfile
;
1615 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1617 /* Go through symtabs. */
1618 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1620 bv
= BLOCKVECTOR (s
);
1621 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1622 sym
= lookup_block_symbol (block
, name
, domain
);
1625 block_found
= block
;
1626 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1630 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1639 /* Check to see if the symbol is defined in one of the OBJFILE's
1640 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1641 depending on whether or not we want to search global symbols or
1644 static struct symbol
*
1645 lookup_symbol_aux_objfile (struct objfile
*objfile
, int block_index
,
1646 const char *name
, const domain_enum domain
)
1648 struct symbol
*sym
= NULL
;
1649 struct blockvector
*bv
;
1650 const struct block
*block
;
1653 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1655 bv
= BLOCKVECTOR (s
);
1656 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1657 sym
= lookup_block_symbol (block
, name
, domain
);
1660 block_found
= block
;
1661 return fixup_symbol_section (sym
, objfile
);
1668 /* Same as lookup_symbol_aux_objfile, except that it searches all
1669 objfiles. Return the first match found. */
1671 static struct symbol
*
1672 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1673 const domain_enum domain
)
1676 struct objfile
*objfile
;
1678 ALL_OBJFILES (objfile
)
1680 sym
= lookup_symbol_aux_objfile (objfile
, block_index
, name
, domain
);
1688 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1689 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1690 and all related objfiles. */
1692 static struct symbol
*
1693 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
1694 const char *linkage_name
,
1697 enum language lang
= current_language
->la_language
;
1698 const char *modified_name
;
1699 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
1701 struct objfile
*main_objfile
, *cur_objfile
;
1703 if (objfile
->separate_debug_objfile_backlink
)
1704 main_objfile
= objfile
->separate_debug_objfile_backlink
;
1706 main_objfile
= objfile
;
1708 for (cur_objfile
= main_objfile
;
1710 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
1714 sym
= lookup_symbol_aux_objfile (cur_objfile
, GLOBAL_BLOCK
,
1715 modified_name
, domain
);
1717 sym
= lookup_symbol_aux_objfile (cur_objfile
, STATIC_BLOCK
,
1718 modified_name
, domain
);
1721 do_cleanups (cleanup
);
1726 do_cleanups (cleanup
);
1730 /* A helper function that throws an exception when a symbol was found
1731 in a psymtab but not in a symtab. */
1733 static void ATTRIBUTE_NORETURN
1734 error_in_psymtab_expansion (int kind
, const char *name
, struct symtab
*symtab
)
1737 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1738 %s may be an inlined function, or may be a template function\n \
1739 (if a template, try specifying an instantiation: %s<type>)."),
1740 kind
== GLOBAL_BLOCK
? "global" : "static",
1741 name
, symtab_to_filename_for_display (symtab
), name
, name
);
1744 /* A helper function for lookup_symbol_aux that interfaces with the
1745 "quick" symbol table functions. */
1747 static struct symbol
*
1748 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1749 const char *name
, const domain_enum domain
)
1751 struct symtab
*symtab
;
1752 struct blockvector
*bv
;
1753 const struct block
*block
;
1758 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1762 bv
= BLOCKVECTOR (symtab
);
1763 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1764 sym
= lookup_block_symbol (block
, name
, domain
);
1766 error_in_psymtab_expansion (kind
, name
, symtab
);
1767 return fixup_symbol_section (sym
, objfile
);
1770 /* A default version of lookup_symbol_nonlocal for use by languages
1771 that can't think of anything better to do. This implements the C
1775 basic_lookup_symbol_nonlocal (const char *name
,
1776 const struct block
*block
,
1777 const domain_enum domain
)
1781 /* NOTE: carlton/2003-05-19: The comments below were written when
1782 this (or what turned into this) was part of lookup_symbol_aux;
1783 I'm much less worried about these questions now, since these
1784 decisions have turned out well, but I leave these comments here
1787 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1788 not it would be appropriate to search the current global block
1789 here as well. (That's what this code used to do before the
1790 is_a_field_of_this check was moved up.) On the one hand, it's
1791 redundant with the lookup_symbol_aux_symtabs search that happens
1792 next. On the other hand, if decode_line_1 is passed an argument
1793 like filename:var, then the user presumably wants 'var' to be
1794 searched for in filename. On the third hand, there shouldn't be
1795 multiple global variables all of which are named 'var', and it's
1796 not like decode_line_1 has ever restricted its search to only
1797 global variables in a single filename. All in all, only
1798 searching the static block here seems best: it's correct and it's
1801 /* NOTE: carlton/2002-12-05: There's also a possible performance
1802 issue here: if you usually search for global symbols in the
1803 current file, then it would be slightly better to search the
1804 current global block before searching all the symtabs. But there
1805 are other factors that have a much greater effect on performance
1806 than that one, so I don't think we should worry about that for
1809 sym
= lookup_symbol_static (name
, block
, domain
);
1813 return lookup_symbol_global (name
, block
, domain
);
1816 /* Lookup a symbol in the static block associated to BLOCK, if there
1817 is one; do nothing if BLOCK is NULL or a global block. */
1820 lookup_symbol_static (const char *name
,
1821 const struct block
*block
,
1822 const domain_enum domain
)
1824 const struct block
*static_block
= block_static_block (block
);
1826 if (static_block
!= NULL
)
1827 return lookup_symbol_aux_block (name
, static_block
, domain
);
1832 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1834 struct global_sym_lookup_data
1836 /* The name of the symbol we are searching for. */
1839 /* The domain to use for our search. */
1842 /* The field where the callback should store the symbol if found.
1843 It should be initialized to NULL before the search is started. */
1844 struct symbol
*result
;
1847 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1848 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1849 OBJFILE. The arguments for the search are passed via CB_DATA,
1850 which in reality is a pointer to struct global_sym_lookup_data. */
1853 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
1856 struct global_sym_lookup_data
*data
=
1857 (struct global_sym_lookup_data
*) cb_data
;
1859 gdb_assert (data
->result
== NULL
);
1861 data
->result
= lookup_symbol_aux_objfile (objfile
, GLOBAL_BLOCK
,
1862 data
->name
, data
->domain
);
1863 if (data
->result
== NULL
)
1864 data
->result
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
,
1865 data
->name
, data
->domain
);
1867 /* If we found a match, tell the iterator to stop. Otherwise,
1869 return (data
->result
!= NULL
);
1872 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1876 lookup_symbol_global (const char *name
,
1877 const struct block
*block
,
1878 const domain_enum domain
)
1880 struct symbol
*sym
= NULL
;
1881 struct objfile
*objfile
= NULL
;
1882 struct global_sym_lookup_data lookup_data
;
1884 /* Call library-specific lookup procedure. */
1885 objfile
= lookup_objfile_from_block (block
);
1886 if (objfile
!= NULL
)
1887 sym
= solib_global_lookup (objfile
, name
, domain
);
1891 memset (&lookup_data
, 0, sizeof (lookup_data
));
1892 lookup_data
.name
= name
;
1893 lookup_data
.domain
= domain
;
1894 gdbarch_iterate_over_objfiles_in_search_order
1895 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
1896 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
1898 return lookup_data
.result
;
1902 symbol_matches_domain (enum language symbol_language
,
1903 domain_enum symbol_domain
,
1906 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1907 A Java class declaration also defines a typedef for the class.
1908 Similarly, any Ada type declaration implicitly defines a typedef. */
1909 if (symbol_language
== language_cplus
1910 || symbol_language
== language_d
1911 || symbol_language
== language_java
1912 || symbol_language
== language_ada
)
1914 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1915 && symbol_domain
== STRUCT_DOMAIN
)
1918 /* For all other languages, strict match is required. */
1919 return (symbol_domain
== domain
);
1922 /* Look up a type named NAME in the struct_domain. The type returned
1923 must not be opaque -- i.e., must have at least one field
1927 lookup_transparent_type (const char *name
)
1929 return current_language
->la_lookup_transparent_type (name
);
1932 /* A helper for basic_lookup_transparent_type that interfaces with the
1933 "quick" symbol table functions. */
1935 static struct type
*
1936 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1939 struct symtab
*symtab
;
1940 struct blockvector
*bv
;
1941 struct block
*block
;
1946 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1950 bv
= BLOCKVECTOR (symtab
);
1951 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1952 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1954 error_in_psymtab_expansion (kind
, name
, symtab
);
1956 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1957 return SYMBOL_TYPE (sym
);
1962 /* The standard implementation of lookup_transparent_type. This code
1963 was modeled on lookup_symbol -- the parts not relevant to looking
1964 up types were just left out. In particular it's assumed here that
1965 types are available in struct_domain and only at file-static or
1969 basic_lookup_transparent_type (const char *name
)
1972 struct symtab
*s
= NULL
;
1973 struct blockvector
*bv
;
1974 struct objfile
*objfile
;
1975 struct block
*block
;
1978 /* Now search all the global symbols. Do the symtab's first, then
1979 check the psymtab's. If a psymtab indicates the existence
1980 of the desired name as a global, then do psymtab-to-symtab
1981 conversion on the fly and return the found symbol. */
1983 ALL_OBJFILES (objfile
)
1985 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1987 bv
= BLOCKVECTOR (s
);
1988 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1989 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1990 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1992 return SYMBOL_TYPE (sym
);
1997 ALL_OBJFILES (objfile
)
1999 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2004 /* Now search the static file-level symbols.
2005 Not strictly correct, but more useful than an error.
2006 Do the symtab's first, then
2007 check the psymtab's. If a psymtab indicates the existence
2008 of the desired name as a file-level static, then do psymtab-to-symtab
2009 conversion on the fly and return the found symbol. */
2011 ALL_OBJFILES (objfile
)
2013 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
2015 bv
= BLOCKVECTOR (s
);
2016 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
2017 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
2018 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2020 return SYMBOL_TYPE (sym
);
2025 ALL_OBJFILES (objfile
)
2027 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2032 return (struct type
*) 0;
2035 /* Search BLOCK for symbol NAME in DOMAIN.
2037 Note that if NAME is the demangled form of a C++ symbol, we will fail
2038 to find a match during the binary search of the non-encoded names, but
2039 for now we don't worry about the slight inefficiency of looking for
2040 a match we'll never find, since it will go pretty quick. Once the
2041 binary search terminates, we drop through and do a straight linear
2042 search on the symbols. Each symbol which is marked as being a ObjC/C++
2043 symbol (language_cplus or language_objc set) has both the encoded and
2044 non-encoded names tested for a match. */
2047 lookup_block_symbol (const struct block
*block
, const char *name
,
2048 const domain_enum domain
)
2050 struct block_iterator iter
;
2053 if (!BLOCK_FUNCTION (block
))
2055 for (sym
= block_iter_name_first (block
, name
, &iter
);
2057 sym
= block_iter_name_next (name
, &iter
))
2059 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2060 SYMBOL_DOMAIN (sym
), domain
))
2067 /* Note that parameter symbols do not always show up last in the
2068 list; this loop makes sure to take anything else other than
2069 parameter symbols first; it only uses parameter symbols as a
2070 last resort. Note that this only takes up extra computation
2073 struct symbol
*sym_found
= NULL
;
2075 for (sym
= block_iter_name_first (block
, name
, &iter
);
2077 sym
= block_iter_name_next (name
, &iter
))
2079 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2080 SYMBOL_DOMAIN (sym
), domain
))
2083 if (!SYMBOL_IS_ARGUMENT (sym
))
2089 return (sym_found
); /* Will be NULL if not found. */
2093 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2095 For each symbol that matches, CALLBACK is called. The symbol and
2096 DATA are passed to the callback.
2098 If CALLBACK returns zero, the iteration ends. Otherwise, the
2099 search continues. */
2102 iterate_over_symbols (const struct block
*block
, const char *name
,
2103 const domain_enum domain
,
2104 symbol_found_callback_ftype
*callback
,
2107 struct block_iterator iter
;
2110 for (sym
= block_iter_name_first (block
, name
, &iter
);
2112 sym
= block_iter_name_next (name
, &iter
))
2114 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2115 SYMBOL_DOMAIN (sym
), domain
))
2117 if (!callback (sym
, data
))
2123 /* Find the symtab associated with PC and SECTION. Look through the
2124 psymtabs and read in another symtab if necessary. */
2127 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2130 struct blockvector
*bv
;
2131 struct symtab
*s
= NULL
;
2132 struct symtab
*best_s
= NULL
;
2133 struct objfile
*objfile
;
2134 CORE_ADDR distance
= 0;
2135 struct minimal_symbol
*msymbol
;
2137 /* If we know that this is not a text address, return failure. This is
2138 necessary because we loop based on the block's high and low code
2139 addresses, which do not include the data ranges, and because
2140 we call find_pc_sect_psymtab which has a similar restriction based
2141 on the partial_symtab's texthigh and textlow. */
2142 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
;
2144 && (MSYMBOL_TYPE (msymbol
) == mst_data
2145 || MSYMBOL_TYPE (msymbol
) == mst_bss
2146 || MSYMBOL_TYPE (msymbol
) == mst_abs
2147 || MSYMBOL_TYPE (msymbol
) == mst_file_data
2148 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
2151 /* Search all symtabs for the one whose file contains our address, and which
2152 is the smallest of all the ones containing the address. This is designed
2153 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2154 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2155 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2157 This happens for native ecoff format, where code from included files
2158 gets its own symtab. The symtab for the included file should have
2159 been read in already via the dependency mechanism.
2160 It might be swifter to create several symtabs with the same name
2161 like xcoff does (I'm not sure).
2163 It also happens for objfiles that have their functions reordered.
2164 For these, the symtab we are looking for is not necessarily read in. */
2166 ALL_PRIMARY_SYMTABS (objfile
, s
)
2168 bv
= BLOCKVECTOR (s
);
2169 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2171 if (BLOCK_START (b
) <= pc
2172 && BLOCK_END (b
) > pc
2174 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2176 /* For an objfile that has its functions reordered,
2177 find_pc_psymtab will find the proper partial symbol table
2178 and we simply return its corresponding symtab. */
2179 /* In order to better support objfiles that contain both
2180 stabs and coff debugging info, we continue on if a psymtab
2182 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2184 struct symtab
*result
;
2187 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2196 struct block_iterator iter
;
2197 struct symbol
*sym
= NULL
;
2199 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2201 fixup_symbol_section (sym
, objfile
);
2202 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2207 continue; /* No symbol in this symtab matches
2210 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2218 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2220 ALL_OBJFILES (objfile
)
2222 struct symtab
*result
;
2226 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2237 /* Find the symtab associated with PC. Look through the psymtabs and read
2238 in another symtab if necessary. Backward compatibility, no section. */
2241 find_pc_symtab (CORE_ADDR pc
)
2243 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2247 /* Find the source file and line number for a given PC value and SECTION.
2248 Return a structure containing a symtab pointer, a line number,
2249 and a pc range for the entire source line.
2250 The value's .pc field is NOT the specified pc.
2251 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2252 use the line that ends there. Otherwise, in that case, the line
2253 that begins there is used. */
2255 /* The big complication here is that a line may start in one file, and end just
2256 before the start of another file. This usually occurs when you #include
2257 code in the middle of a subroutine. To properly find the end of a line's PC
2258 range, we must search all symtabs associated with this compilation unit, and
2259 find the one whose first PC is closer than that of the next line in this
2262 /* If it's worth the effort, we could be using a binary search. */
2264 struct symtab_and_line
2265 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2268 struct linetable
*l
;
2271 struct linetable_entry
*item
;
2272 struct symtab_and_line val
;
2273 struct blockvector
*bv
;
2274 struct bound_minimal_symbol msymbol
;
2275 struct minimal_symbol
*mfunsym
;
2276 struct objfile
*objfile
;
2278 /* Info on best line seen so far, and where it starts, and its file. */
2280 struct linetable_entry
*best
= NULL
;
2281 CORE_ADDR best_end
= 0;
2282 struct symtab
*best_symtab
= 0;
2284 /* Store here the first line number
2285 of a file which contains the line at the smallest pc after PC.
2286 If we don't find a line whose range contains PC,
2287 we will use a line one less than this,
2288 with a range from the start of that file to the first line's pc. */
2289 struct linetable_entry
*alt
= NULL
;
2291 /* Info on best line seen in this file. */
2293 struct linetable_entry
*prev
;
2295 /* If this pc is not from the current frame,
2296 it is the address of the end of a call instruction.
2297 Quite likely that is the start of the following statement.
2298 But what we want is the statement containing the instruction.
2299 Fudge the pc to make sure we get that. */
2301 init_sal (&val
); /* initialize to zeroes */
2303 val
.pspace
= current_program_space
;
2305 /* It's tempting to assume that, if we can't find debugging info for
2306 any function enclosing PC, that we shouldn't search for line
2307 number info, either. However, GAS can emit line number info for
2308 assembly files --- very helpful when debugging hand-written
2309 assembly code. In such a case, we'd have no debug info for the
2310 function, but we would have line info. */
2315 /* elz: added this because this function returned the wrong
2316 information if the pc belongs to a stub (import/export)
2317 to call a shlib function. This stub would be anywhere between
2318 two functions in the target, and the line info was erroneously
2319 taken to be the one of the line before the pc. */
2321 /* RT: Further explanation:
2323 * We have stubs (trampolines) inserted between procedures.
2325 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2326 * exists in the main image.
2328 * In the minimal symbol table, we have a bunch of symbols
2329 * sorted by start address. The stubs are marked as "trampoline",
2330 * the others appear as text. E.g.:
2332 * Minimal symbol table for main image
2333 * main: code for main (text symbol)
2334 * shr1: stub (trampoline symbol)
2335 * foo: code for foo (text symbol)
2337 * Minimal symbol table for "shr1" image:
2339 * shr1: code for shr1 (text symbol)
2342 * So the code below is trying to detect if we are in the stub
2343 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2344 * and if found, do the symbolization from the real-code address
2345 * rather than the stub address.
2347 * Assumptions being made about the minimal symbol table:
2348 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2349 * if we're really in the trampoline.s If we're beyond it (say
2350 * we're in "foo" in the above example), it'll have a closer
2351 * symbol (the "foo" text symbol for example) and will not
2352 * return the trampoline.
2353 * 2. lookup_minimal_symbol_text() will find a real text symbol
2354 * corresponding to the trampoline, and whose address will
2355 * be different than the trampoline address. I put in a sanity
2356 * check for the address being the same, to avoid an
2357 * infinite recursion.
2359 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2360 if (msymbol
.minsym
!= NULL
)
2361 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
2364 = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
.minsym
),
2366 if (mfunsym
== NULL
)
2367 /* I eliminated this warning since it is coming out
2368 * in the following situation:
2369 * gdb shmain // test program with shared libraries
2370 * (gdb) break shr1 // function in shared lib
2371 * Warning: In stub for ...
2372 * In the above situation, the shared lib is not loaded yet,
2373 * so of course we can't find the real func/line info,
2374 * but the "break" still works, and the warning is annoying.
2375 * So I commented out the warning. RT */
2376 /* warning ("In stub for %s; unable to find real function/line info",
2377 SYMBOL_LINKAGE_NAME (msymbol)); */
2380 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
2381 == SYMBOL_VALUE_ADDRESS (msymbol
.minsym
))
2382 /* Avoid infinite recursion */
2383 /* See above comment about why warning is commented out. */
2384 /* warning ("In stub for %s; unable to find real function/line info",
2385 SYMBOL_LINKAGE_NAME (msymbol)); */
2389 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2393 s
= find_pc_sect_symtab (pc
, section
);
2396 /* If no symbol information, return previous pc. */
2403 bv
= BLOCKVECTOR (s
);
2404 objfile
= s
->objfile
;
2406 /* Look at all the symtabs that share this blockvector.
2407 They all have the same apriori range, that we found was right;
2408 but they have different line tables. */
2410 ALL_OBJFILE_SYMTABS (objfile
, s
)
2412 if (BLOCKVECTOR (s
) != bv
)
2415 /* Find the best line in this symtab. */
2422 /* I think len can be zero if the symtab lacks line numbers
2423 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2424 I'm not sure which, and maybe it depends on the symbol
2430 item
= l
->item
; /* Get first line info. */
2432 /* Is this file's first line closer than the first lines of other files?
2433 If so, record this file, and its first line, as best alternate. */
2434 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2437 for (i
= 0; i
< len
; i
++, item
++)
2439 /* Leave prev pointing to the linetable entry for the last line
2440 that started at or before PC. */
2447 /* At this point, prev points at the line whose start addr is <= pc, and
2448 item points at the next line. If we ran off the end of the linetable
2449 (pc >= start of the last line), then prev == item. If pc < start of
2450 the first line, prev will not be set. */
2452 /* Is this file's best line closer than the best in the other files?
2453 If so, record this file, and its best line, as best so far. Don't
2454 save prev if it represents the end of a function (i.e. line number
2455 0) instead of a real line. */
2457 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2462 /* Discard BEST_END if it's before the PC of the current BEST. */
2463 if (best_end
<= best
->pc
)
2467 /* If another line (denoted by ITEM) is in the linetable and its
2468 PC is after BEST's PC, but before the current BEST_END, then
2469 use ITEM's PC as the new best_end. */
2470 if (best
&& i
< len
&& item
->pc
> best
->pc
2471 && (best_end
== 0 || best_end
> item
->pc
))
2472 best_end
= item
->pc
;
2477 /* If we didn't find any line number info, just return zeros.
2478 We used to return alt->line - 1 here, but that could be
2479 anywhere; if we don't have line number info for this PC,
2480 don't make some up. */
2483 else if (best
->line
== 0)
2485 /* If our best fit is in a range of PC's for which no line
2486 number info is available (line number is zero) then we didn't
2487 find any valid line information. */
2492 val
.symtab
= best_symtab
;
2493 val
.line
= best
->line
;
2495 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2500 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2502 val
.section
= section
;
2506 /* Backward compatibility (no section). */
2508 struct symtab_and_line
2509 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2511 struct obj_section
*section
;
2513 section
= find_pc_overlay (pc
);
2514 if (pc_in_unmapped_range (pc
, section
))
2515 pc
= overlay_mapped_address (pc
, section
);
2516 return find_pc_sect_line (pc
, section
, notcurrent
);
2519 /* Find line number LINE in any symtab whose name is the same as
2522 If found, return the symtab that contains the linetable in which it was
2523 found, set *INDEX to the index in the linetable of the best entry
2524 found, and set *EXACT_MATCH nonzero if the value returned is an
2527 If not found, return NULL. */
2530 find_line_symtab (struct symtab
*symtab
, int line
,
2531 int *index
, int *exact_match
)
2533 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2535 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2539 struct linetable
*best_linetable
;
2540 struct symtab
*best_symtab
;
2542 /* First try looking it up in the given symtab. */
2543 best_linetable
= LINETABLE (symtab
);
2544 best_symtab
= symtab
;
2545 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
2546 if (best_index
< 0 || !exact
)
2548 /* Didn't find an exact match. So we better keep looking for
2549 another symtab with the same name. In the case of xcoff,
2550 multiple csects for one source file (produced by IBM's FORTRAN
2551 compiler) produce multiple symtabs (this is unavoidable
2552 assuming csects can be at arbitrary places in memory and that
2553 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2555 /* BEST is the smallest linenumber > LINE so far seen,
2556 or 0 if none has been seen so far.
2557 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2560 struct objfile
*objfile
;
2563 if (best_index
>= 0)
2564 best
= best_linetable
->item
[best_index
].line
;
2568 ALL_OBJFILES (objfile
)
2571 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
2572 symtab_to_fullname (symtab
));
2575 ALL_SYMTABS (objfile
, s
)
2577 struct linetable
*l
;
2580 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2582 if (FILENAME_CMP (symtab_to_fullname (symtab
),
2583 symtab_to_fullname (s
)) != 0)
2586 ind
= find_line_common (l
, line
, &exact
, 0);
2596 if (best
== 0 || l
->item
[ind
].line
< best
)
2598 best
= l
->item
[ind
].line
;
2611 *index
= best_index
;
2613 *exact_match
= exact
;
2618 /* Given SYMTAB, returns all the PCs function in the symtab that
2619 exactly match LINE. Returns NULL if there are no exact matches,
2620 but updates BEST_ITEM in this case. */
2623 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
2624 struct linetable_entry
**best_item
)
2627 VEC (CORE_ADDR
) *result
= NULL
;
2629 /* First, collect all the PCs that are at this line. */
2635 idx
= find_line_common (LINETABLE (symtab
), line
, &was_exact
, start
);
2641 struct linetable_entry
*item
= &LINETABLE (symtab
)->item
[idx
];
2643 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
2649 VEC_safe_push (CORE_ADDR
, result
, LINETABLE (symtab
)->item
[idx
].pc
);
2657 /* Set the PC value for a given source file and line number and return true.
2658 Returns zero for invalid line number (and sets the PC to 0).
2659 The source file is specified with a struct symtab. */
2662 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2664 struct linetable
*l
;
2671 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2674 l
= LINETABLE (symtab
);
2675 *pc
= l
->item
[ind
].pc
;
2682 /* Find the range of pc values in a line.
2683 Store the starting pc of the line into *STARTPTR
2684 and the ending pc (start of next line) into *ENDPTR.
2685 Returns 1 to indicate success.
2686 Returns 0 if could not find the specified line. */
2689 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2692 CORE_ADDR startaddr
;
2693 struct symtab_and_line found_sal
;
2696 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2699 /* This whole function is based on address. For example, if line 10 has
2700 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2701 "info line *0x123" should say the line goes from 0x100 to 0x200
2702 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2703 This also insures that we never give a range like "starts at 0x134
2704 and ends at 0x12c". */
2706 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2707 if (found_sal
.line
!= sal
.line
)
2709 /* The specified line (sal) has zero bytes. */
2710 *startptr
= found_sal
.pc
;
2711 *endptr
= found_sal
.pc
;
2715 *startptr
= found_sal
.pc
;
2716 *endptr
= found_sal
.end
;
2721 /* Given a line table and a line number, return the index into the line
2722 table for the pc of the nearest line whose number is >= the specified one.
2723 Return -1 if none is found. The value is >= 0 if it is an index.
2724 START is the index at which to start searching the line table.
2726 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2729 find_line_common (struct linetable
*l
, int lineno
,
2730 int *exact_match
, int start
)
2735 /* BEST is the smallest linenumber > LINENO so far seen,
2736 or 0 if none has been seen so far.
2737 BEST_INDEX identifies the item for it. */
2739 int best_index
= -1;
2750 for (i
= start
; i
< len
; i
++)
2752 struct linetable_entry
*item
= &(l
->item
[i
]);
2754 if (item
->line
== lineno
)
2756 /* Return the first (lowest address) entry which matches. */
2761 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2768 /* If we got here, we didn't get an exact match. */
2773 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2775 struct symtab_and_line sal
;
2777 sal
= find_pc_line (pc
, 0);
2780 return sal
.symtab
!= 0;
2783 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2784 address for that function that has an entry in SYMTAB's line info
2785 table. If such an entry cannot be found, return FUNC_ADDR
2789 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2791 CORE_ADDR func_start
, func_end
;
2792 struct linetable
*l
;
2795 /* Give up if this symbol has no lineinfo table. */
2796 l
= LINETABLE (symtab
);
2800 /* Get the range for the function's PC values, or give up if we
2801 cannot, for some reason. */
2802 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2805 /* Linetable entries are ordered by PC values, see the commentary in
2806 symtab.h where `struct linetable' is defined. Thus, the first
2807 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2808 address we are looking for. */
2809 for (i
= 0; i
< l
->nitems
; i
++)
2811 struct linetable_entry
*item
= &(l
->item
[i
]);
2813 /* Don't use line numbers of zero, they mark special entries in
2814 the table. See the commentary on symtab.h before the
2815 definition of struct linetable. */
2816 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2823 /* Given a function symbol SYM, find the symtab and line for the start
2825 If the argument FUNFIRSTLINE is nonzero, we want the first line
2826 of real code inside the function. */
2828 struct symtab_and_line
2829 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2831 struct symtab_and_line sal
;
2833 fixup_symbol_section (sym
, NULL
);
2834 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2835 SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
), 0);
2837 /* We always should have a line for the function start address.
2838 If we don't, something is odd. Create a plain SAL refering
2839 just the PC and hope that skip_prologue_sal (if requested)
2840 can find a line number for after the prologue. */
2841 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2844 sal
.pspace
= current_program_space
;
2845 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2846 sal
.section
= SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
);
2850 skip_prologue_sal (&sal
);
2855 /* Adjust SAL to the first instruction past the function prologue.
2856 If the PC was explicitly specified, the SAL is not changed.
2857 If the line number was explicitly specified, at most the SAL's PC
2858 is updated. If SAL is already past the prologue, then do nothing. */
2861 skip_prologue_sal (struct symtab_and_line
*sal
)
2864 struct symtab_and_line start_sal
;
2865 struct cleanup
*old_chain
;
2866 CORE_ADDR pc
, saved_pc
;
2867 struct obj_section
*section
;
2869 struct objfile
*objfile
;
2870 struct gdbarch
*gdbarch
;
2871 struct block
*b
, *function_block
;
2872 int force_skip
, skip
;
2874 /* Do not change the SAL if PC was specified explicitly. */
2875 if (sal
->explicit_pc
)
2878 old_chain
= save_current_space_and_thread ();
2879 switch_to_program_space_and_thread (sal
->pspace
);
2881 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2884 fixup_symbol_section (sym
, NULL
);
2886 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2887 section
= SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
);
2888 name
= SYMBOL_LINKAGE_NAME (sym
);
2889 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2893 struct bound_minimal_symbol msymbol
2894 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2896 if (msymbol
.minsym
== NULL
)
2898 do_cleanups (old_chain
);
2902 objfile
= msymbol
.objfile
;
2903 pc
= SYMBOL_VALUE_ADDRESS (msymbol
.minsym
);
2904 section
= SYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
2905 name
= SYMBOL_LINKAGE_NAME (msymbol
.minsym
);
2908 gdbarch
= get_objfile_arch (objfile
);
2910 /* Process the prologue in two passes. In the first pass try to skip the
2911 prologue (SKIP is true) and verify there is a real need for it (indicated
2912 by FORCE_SKIP). If no such reason was found run a second pass where the
2913 prologue is not skipped (SKIP is false). */
2918 /* Be conservative - allow direct PC (without skipping prologue) only if we
2919 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2920 have to be set by the caller so we use SYM instead. */
2921 if (sym
&& SYMBOL_SYMTAB (sym
)->locations_valid
)
2929 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2930 so that gdbarch_skip_prologue has something unique to work on. */
2931 if (section_is_overlay (section
) && !section_is_mapped (section
))
2932 pc
= overlay_unmapped_address (pc
, section
);
2934 /* Skip "first line" of function (which is actually its prologue). */
2935 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2937 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2939 /* For overlays, map pc back into its mapped VMA range. */
2940 pc
= overlay_mapped_address (pc
, section
);
2942 /* Calculate line number. */
2943 start_sal
= find_pc_sect_line (pc
, section
, 0);
2945 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2946 line is still part of the same function. */
2947 if (skip
&& start_sal
.pc
!= pc
2948 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2949 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2950 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
2951 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
2953 /* First pc of next line */
2955 /* Recalculate the line number (might not be N+1). */
2956 start_sal
= find_pc_sect_line (pc
, section
, 0);
2959 /* On targets with executable formats that don't have a concept of
2960 constructors (ELF with .init has, PE doesn't), gcc emits a call
2961 to `__main' in `main' between the prologue and before user
2963 if (gdbarch_skip_main_prologue_p (gdbarch
)
2964 && name
&& strcmp_iw (name
, "main") == 0)
2966 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2967 /* Recalculate the line number (might not be N+1). */
2968 start_sal
= find_pc_sect_line (pc
, section
, 0);
2972 while (!force_skip
&& skip
--);
2974 /* If we still don't have a valid source line, try to find the first
2975 PC in the lineinfo table that belongs to the same function. This
2976 happens with COFF debug info, which does not seem to have an
2977 entry in lineinfo table for the code after the prologue which has
2978 no direct relation to source. For example, this was found to be
2979 the case with the DJGPP target using "gcc -gcoff" when the
2980 compiler inserted code after the prologue to make sure the stack
2982 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
2984 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2985 /* Recalculate the line number. */
2986 start_sal
= find_pc_sect_line (pc
, section
, 0);
2989 do_cleanups (old_chain
);
2991 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2992 forward SAL to the end of the prologue. */
2997 sal
->section
= section
;
2999 /* Unless the explicit_line flag was set, update the SAL line
3000 and symtab to correspond to the modified PC location. */
3001 if (sal
->explicit_line
)
3004 sal
->symtab
= start_sal
.symtab
;
3005 sal
->line
= start_sal
.line
;
3006 sal
->end
= start_sal
.end
;
3008 /* Check if we are now inside an inlined function. If we can,
3009 use the call site of the function instead. */
3010 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3011 function_block
= NULL
;
3014 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3016 else if (BLOCK_FUNCTION (b
) != NULL
)
3018 b
= BLOCK_SUPERBLOCK (b
);
3020 if (function_block
!= NULL
3021 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3023 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3024 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
3028 /* If P is of the form "operator[ \t]+..." where `...' is
3029 some legitimate operator text, return a pointer to the
3030 beginning of the substring of the operator text.
3031 Otherwise, return "". */
3034 operator_chars (char *p
, char **end
)
3037 if (strncmp (p
, "operator", 8))
3041 /* Don't get faked out by `operator' being part of a longer
3043 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3046 /* Allow some whitespace between `operator' and the operator symbol. */
3047 while (*p
== ' ' || *p
== '\t')
3050 /* Recognize 'operator TYPENAME'. */
3052 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3056 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3065 case '\\': /* regexp quoting */
3068 if (p
[2] == '=') /* 'operator\*=' */
3070 else /* 'operator\*' */
3074 else if (p
[1] == '[')
3077 error (_("mismatched quoting on brackets, "
3078 "try 'operator\\[\\]'"));
3079 else if (p
[2] == '\\' && p
[3] == ']')
3081 *end
= p
+ 4; /* 'operator\[\]' */
3085 error (_("nothing is allowed between '[' and ']'"));
3089 /* Gratuitous qoute: skip it and move on. */
3111 if (p
[0] == '-' && p
[1] == '>')
3113 /* Struct pointer member operator 'operator->'. */
3116 *end
= p
+ 3; /* 'operator->*' */
3119 else if (p
[2] == '\\')
3121 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3126 *end
= p
+ 2; /* 'operator->' */
3130 if (p
[1] == '=' || p
[1] == p
[0])
3141 error (_("`operator ()' must be specified "
3142 "without whitespace in `()'"));
3147 error (_("`operator ?:' must be specified "
3148 "without whitespace in `?:'"));
3153 error (_("`operator []' must be specified "
3154 "without whitespace in `[]'"));
3158 error (_("`operator %s' not supported"), p
);
3167 /* Cache to watch for file names already seen by filename_seen. */
3169 struct filename_seen_cache
3171 /* Table of files seen so far. */
3173 /* Initial size of the table. It automagically grows from here. */
3174 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3177 /* filename_seen_cache constructor. */
3179 static struct filename_seen_cache
*
3180 create_filename_seen_cache (void)
3182 struct filename_seen_cache
*cache
;
3184 cache
= XNEW (struct filename_seen_cache
);
3185 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3186 filename_hash
, filename_eq
,
3187 NULL
, xcalloc
, xfree
);
3192 /* Empty the cache, but do not delete it. */
3195 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
3197 htab_empty (cache
->tab
);
3200 /* filename_seen_cache destructor.
3201 This takes a void * argument as it is generally used as a cleanup. */
3204 delete_filename_seen_cache (void *ptr
)
3206 struct filename_seen_cache
*cache
= ptr
;
3208 htab_delete (cache
->tab
);
3212 /* If FILE is not already in the table of files in CACHE, return zero;
3213 otherwise return non-zero. Optionally add FILE to the table if ADD
3216 NOTE: We don't manage space for FILE, we assume FILE lives as long
3217 as the caller needs. */
3220 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
3224 /* Is FILE in tab? */
3225 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
3229 /* No; maybe add it to tab. */
3231 *slot
= (char *) file
;
3236 /* Data structure to maintain printing state for output_source_filename. */
3238 struct output_source_filename_data
3240 /* Cache of what we've seen so far. */
3241 struct filename_seen_cache
*filename_seen_cache
;
3243 /* Flag of whether we're printing the first one. */
3247 /* Slave routine for sources_info. Force line breaks at ,'s.
3248 NAME is the name to print.
3249 DATA contains the state for printing and watching for duplicates. */
3252 output_source_filename (const char *name
,
3253 struct output_source_filename_data
*data
)
3255 /* Since a single source file can result in several partial symbol
3256 tables, we need to avoid printing it more than once. Note: if
3257 some of the psymtabs are read in and some are not, it gets
3258 printed both under "Source files for which symbols have been
3259 read" and "Source files for which symbols will be read in on
3260 demand". I consider this a reasonable way to deal with the
3261 situation. I'm not sure whether this can also happen for
3262 symtabs; it doesn't hurt to check. */
3264 /* Was NAME already seen? */
3265 if (filename_seen (data
->filename_seen_cache
, name
, 1))
3267 /* Yes; don't print it again. */
3271 /* No; print it and reset *FIRST. */
3273 printf_filtered (", ");
3277 fputs_filtered (name
, gdb_stdout
);
3280 /* A callback for map_partial_symbol_filenames. */
3283 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3286 output_source_filename (fullname
? fullname
: filename
, data
);
3290 sources_info (char *ignore
, int from_tty
)
3293 struct objfile
*objfile
;
3294 struct output_source_filename_data data
;
3295 struct cleanup
*cleanups
;
3297 if (!have_full_symbols () && !have_partial_symbols ())
3299 error (_("No symbol table is loaded. Use the \"file\" command."));
3302 data
.filename_seen_cache
= create_filename_seen_cache ();
3303 cleanups
= make_cleanup (delete_filename_seen_cache
,
3304 data
.filename_seen_cache
);
3306 printf_filtered ("Source files for which symbols have been read in:\n\n");
3309 ALL_SYMTABS (objfile
, s
)
3311 const char *fullname
= symtab_to_fullname (s
);
3313 output_source_filename (fullname
, &data
);
3315 printf_filtered ("\n\n");
3317 printf_filtered ("Source files for which symbols "
3318 "will be read in on demand:\n\n");
3320 clear_filename_seen_cache (data
.filename_seen_cache
);
3322 map_symbol_filenames (output_partial_symbol_filename
, &data
,
3323 1 /*need_fullname*/);
3324 printf_filtered ("\n");
3326 do_cleanups (cleanups
);
3329 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
3330 non-zero compare only lbasename of FILES. */
3333 file_matches (const char *file
, char *files
[], int nfiles
, int basenames
)
3337 if (file
!= NULL
&& nfiles
!= 0)
3339 for (i
= 0; i
< nfiles
; i
++)
3341 if (compare_filenames_for_search (file
, (basenames
3342 ? lbasename (files
[i
])
3347 else if (nfiles
== 0)
3352 /* Free any memory associated with a search. */
3355 free_search_symbols (struct symbol_search
*symbols
)
3357 struct symbol_search
*p
;
3358 struct symbol_search
*next
;
3360 for (p
= symbols
; p
!= NULL
; p
= next
)
3368 do_free_search_symbols_cleanup (void *symbolsp
)
3370 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
3372 free_search_symbols (symbols
);
3376 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
3378 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
3381 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
3382 sort symbols, not minimal symbols. */
3385 compare_search_syms (const void *sa
, const void *sb
)
3387 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
3388 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
3391 c
= FILENAME_CMP (sym_a
->symtab
->filename
, sym_b
->symtab
->filename
);
3395 if (sym_a
->block
!= sym_b
->block
)
3396 return sym_a
->block
- sym_b
->block
;
3398 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
3399 SYMBOL_PRINT_NAME (sym_b
->symbol
));
3402 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
3403 The duplicates are freed, and the new list is returned in
3404 *NEW_HEAD, *NEW_TAIL. */
3407 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
3408 struct symbol_search
**new_head
,
3409 struct symbol_search
**new_tail
)
3411 struct symbol_search
**symbols
, *symp
, *old_next
;
3414 gdb_assert (found
!= NULL
&& nfound
> 0);
3416 /* Build an array out of the list so we can easily sort them. */
3417 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3420 for (i
= 0; i
< nfound
; i
++)
3422 gdb_assert (symp
!= NULL
);
3423 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
3427 gdb_assert (symp
== NULL
);
3429 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3430 compare_search_syms
);
3432 /* Collapse out the dups. */
3433 for (i
= 1, j
= 1; i
< nfound
; ++i
)
3435 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
3436 symbols
[j
++] = symbols
[i
];
3441 symbols
[j
- 1]->next
= NULL
;
3443 /* Rebuild the linked list. */
3444 for (i
= 0; i
< nunique
- 1; i
++)
3445 symbols
[i
]->next
= symbols
[i
+ 1];
3446 symbols
[nunique
- 1]->next
= NULL
;
3448 *new_head
= symbols
[0];
3449 *new_tail
= symbols
[nunique
- 1];
3453 /* An object of this type is passed as the user_data to the
3454 expand_symtabs_matching method. */
3455 struct search_symbols_data
3460 /* It is true if PREG contains valid data, false otherwise. */
3461 unsigned preg_p
: 1;
3465 /* A callback for expand_symtabs_matching. */
3468 search_symbols_file_matches (const char *filename
, void *user_data
,
3471 struct search_symbols_data
*data
= user_data
;
3473 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
3476 /* A callback for expand_symtabs_matching. */
3479 search_symbols_name_matches (const char *symname
, void *user_data
)
3481 struct search_symbols_data
*data
= user_data
;
3483 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3486 /* Search the symbol table for matches to the regular expression REGEXP,
3487 returning the results in *MATCHES.
3489 Only symbols of KIND are searched:
3490 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3491 and constants (enums)
3492 FUNCTIONS_DOMAIN - search all functions
3493 TYPES_DOMAIN - search all type names
3494 ALL_DOMAIN - an internal error for this function
3496 free_search_symbols should be called when *MATCHES is no longer needed.
3498 Within each file the results are sorted locally; each symtab's global and
3499 static blocks are separately alphabetized.
3500 Duplicate entries are removed. */
3503 search_symbols (char *regexp
, enum search_domain kind
,
3504 int nfiles
, char *files
[],
3505 struct symbol_search
**matches
)
3508 struct blockvector
*bv
;
3511 struct block_iterator iter
;
3513 struct objfile
*objfile
;
3514 struct minimal_symbol
*msymbol
;
3516 static const enum minimal_symbol_type types
[]
3517 = {mst_data
, mst_text
, mst_abs
};
3518 static const enum minimal_symbol_type types2
[]
3519 = {mst_bss
, mst_file_text
, mst_abs
};
3520 static const enum minimal_symbol_type types3
[]
3521 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3522 static const enum minimal_symbol_type types4
[]
3523 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3524 enum minimal_symbol_type ourtype
;
3525 enum minimal_symbol_type ourtype2
;
3526 enum minimal_symbol_type ourtype3
;
3527 enum minimal_symbol_type ourtype4
;
3528 struct symbol_search
*found
;
3529 struct symbol_search
*tail
;
3530 struct search_symbols_data datum
;
3533 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3534 CLEANUP_CHAIN is freed only in the case of an error. */
3535 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3536 struct cleanup
*retval_chain
;
3538 gdb_assert (kind
<= TYPES_DOMAIN
);
3540 ourtype
= types
[kind
];
3541 ourtype2
= types2
[kind
];
3542 ourtype3
= types3
[kind
];
3543 ourtype4
= types4
[kind
];
3550 /* Make sure spacing is right for C++ operators.
3551 This is just a courtesy to make the matching less sensitive
3552 to how many spaces the user leaves between 'operator'
3553 and <TYPENAME> or <OPERATOR>. */
3555 char *opname
= operator_chars (regexp
, &opend
);
3560 int fix
= -1; /* -1 means ok; otherwise number of
3563 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3565 /* There should 1 space between 'operator' and 'TYPENAME'. */
3566 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3571 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3572 if (opname
[-1] == ' ')
3575 /* If wrong number of spaces, fix it. */
3578 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3580 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3585 errcode
= regcomp (&datum
.preg
, regexp
,
3586 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3590 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3592 make_cleanup (xfree
, err
);
3593 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3596 make_regfree_cleanup (&datum
.preg
);
3599 /* Search through the partial symtabs *first* for all symbols
3600 matching the regexp. That way we don't have to reproduce all of
3601 the machinery below. */
3603 datum
.nfiles
= nfiles
;
3604 datum
.files
= files
;
3605 expand_symtabs_matching ((nfiles
== 0
3607 : search_symbols_file_matches
),
3608 search_symbols_name_matches
,
3611 /* Here, we search through the minimal symbol tables for functions
3612 and variables that match, and force their symbols to be read.
3613 This is in particular necessary for demangled variable names,
3614 which are no longer put into the partial symbol tables.
3615 The symbol will then be found during the scan of symtabs below.
3617 For functions, find_pc_symtab should succeed if we have debug info
3618 for the function, for variables we have to call
3619 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3621 If the lookup fails, set found_misc so that we will rescan to print
3622 any matching symbols without debug info.
3623 We only search the objfile the msymbol came from, we no longer search
3624 all objfiles. In large programs (1000s of shared libs) searching all
3625 objfiles is not worth the pain. */
3627 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3629 ALL_MSYMBOLS (objfile
, msymbol
)
3633 if (msymbol
->created_by_gdb
)
3636 if (MSYMBOL_TYPE (msymbol
) == ourtype
3637 || MSYMBOL_TYPE (msymbol
) == ourtype2
3638 || MSYMBOL_TYPE (msymbol
) == ourtype3
3639 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3642 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3645 /* Note: An important side-effect of these lookup functions
3646 is to expand the symbol table if msymbol is found, for the
3647 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3648 if (kind
== FUNCTIONS_DOMAIN
3649 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
3650 : (lookup_symbol_in_objfile_from_linkage_name
3651 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3662 retval_chain
= make_cleanup_free_search_symbols (&found
);
3664 ALL_PRIMARY_SYMTABS (objfile
, s
)
3666 bv
= BLOCKVECTOR (s
);
3667 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3669 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3670 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3672 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3676 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
3677 a substring of symtab_to_fullname as it may contain "./" etc. */
3678 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
3679 || ((basenames_may_differ
3680 || file_matches (lbasename (real_symtab
->filename
),
3682 && file_matches (symtab_to_fullname (real_symtab
),
3685 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3687 && ((kind
== VARIABLES_DOMAIN
3688 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3689 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3690 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3691 /* LOC_CONST can be used for more than just enums,
3692 e.g., c++ static const members.
3693 We only want to skip enums here. */
3694 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3695 && TYPE_CODE (SYMBOL_TYPE (sym
))
3697 || (kind
== FUNCTIONS_DOMAIN
3698 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3699 || (kind
== TYPES_DOMAIN
3700 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3703 struct symbol_search
*psr
= (struct symbol_search
*)
3704 xmalloc (sizeof (struct symbol_search
));
3706 psr
->symtab
= real_symtab
;
3708 memset (&psr
->msymbol
, 0, sizeof (psr
->msymbol
));
3723 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
3724 /* Note: nfound is no longer useful beyond this point. */
3727 /* If there are no eyes, avoid all contact. I mean, if there are
3728 no debug symbols, then print directly from the msymbol_vector. */
3730 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
3732 ALL_MSYMBOLS (objfile
, msymbol
)
3736 if (msymbol
->created_by_gdb
)
3739 if (MSYMBOL_TYPE (msymbol
) == ourtype
3740 || MSYMBOL_TYPE (msymbol
) == ourtype2
3741 || MSYMBOL_TYPE (msymbol
) == ourtype3
3742 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3745 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3748 /* For functions we can do a quick check of whether the
3749 symbol might be found via find_pc_symtab. */
3750 if (kind
!= FUNCTIONS_DOMAIN
3751 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
)
3753 if (lookup_symbol_in_objfile_from_linkage_name
3754 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3758 struct symbol_search
*psr
= (struct symbol_search
*)
3759 xmalloc (sizeof (struct symbol_search
));
3761 psr
->msymbol
.minsym
= msymbol
;
3762 psr
->msymbol
.objfile
= objfile
;
3778 discard_cleanups (retval_chain
);
3779 do_cleanups (old_chain
);
3783 /* Helper function for symtab_symbol_info, this function uses
3784 the data returned from search_symbols() to print information
3785 regarding the match to gdb_stdout. */
3788 print_symbol_info (enum search_domain kind
,
3789 struct symtab
*s
, struct symbol
*sym
,
3790 int block
, const char *last
)
3792 const char *s_filename
= symtab_to_filename_for_display (s
);
3794 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
3796 fputs_filtered ("\nFile ", gdb_stdout
);
3797 fputs_filtered (s_filename
, gdb_stdout
);
3798 fputs_filtered (":\n", gdb_stdout
);
3801 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3802 printf_filtered ("static ");
3804 /* Typedef that is not a C++ class. */
3805 if (kind
== TYPES_DOMAIN
3806 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3807 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3808 /* variable, func, or typedef-that-is-c++-class. */
3809 else if (kind
< TYPES_DOMAIN
3810 || (kind
== TYPES_DOMAIN
3811 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3813 type_print (SYMBOL_TYPE (sym
),
3814 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3815 ? "" : SYMBOL_PRINT_NAME (sym
)),
3818 printf_filtered (";\n");
3822 /* This help function for symtab_symbol_info() prints information
3823 for non-debugging symbols to gdb_stdout. */
3826 print_msymbol_info (struct bound_minimal_symbol msymbol
)
3828 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
3831 if (gdbarch_addr_bit (gdbarch
) <= 32)
3832 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
.minsym
)
3833 & (CORE_ADDR
) 0xffffffff,
3836 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
.minsym
),
3838 printf_filtered ("%s %s\n",
3839 tmp
, SYMBOL_PRINT_NAME (msymbol
.minsym
));
3842 /* This is the guts of the commands "info functions", "info types", and
3843 "info variables". It calls search_symbols to find all matches and then
3844 print_[m]symbol_info to print out some useful information about the
3848 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3850 static const char * const classnames
[] =
3851 {"variable", "function", "type"};
3852 struct symbol_search
*symbols
;
3853 struct symbol_search
*p
;
3854 struct cleanup
*old_chain
;
3855 const char *last_filename
= NULL
;
3858 gdb_assert (kind
<= TYPES_DOMAIN
);
3860 /* Must make sure that if we're interrupted, symbols gets freed. */
3861 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3862 old_chain
= make_cleanup_free_search_symbols (&symbols
);
3865 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
3866 classnames
[kind
], regexp
);
3868 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
3870 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3874 if (p
->msymbol
.minsym
!= NULL
)
3878 printf_filtered (_("\nNon-debugging symbols:\n"));
3881 print_msymbol_info (p
->msymbol
);
3885 print_symbol_info (kind
,
3890 last_filename
= symtab_to_filename_for_display (p
->symtab
);
3894 do_cleanups (old_chain
);
3898 variables_info (char *regexp
, int from_tty
)
3900 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3904 functions_info (char *regexp
, int from_tty
)
3906 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3911 types_info (char *regexp
, int from_tty
)
3913 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3916 /* Breakpoint all functions matching regular expression. */
3919 rbreak_command_wrapper (char *regexp
, int from_tty
)
3921 rbreak_command (regexp
, from_tty
);
3924 /* A cleanup function that calls end_rbreak_breakpoints. */
3927 do_end_rbreak_breakpoints (void *ignore
)
3929 end_rbreak_breakpoints ();
3933 rbreak_command (char *regexp
, int from_tty
)
3935 struct symbol_search
*ss
;
3936 struct symbol_search
*p
;
3937 struct cleanup
*old_chain
;
3938 char *string
= NULL
;
3940 char **files
= NULL
, *file_name
;
3945 char *colon
= strchr (regexp
, ':');
3947 if (colon
&& *(colon
+ 1) != ':')
3951 colon_index
= colon
- regexp
;
3952 file_name
= alloca (colon_index
+ 1);
3953 memcpy (file_name
, regexp
, colon_index
);
3954 file_name
[colon_index
--] = 0;
3955 while (isspace (file_name
[colon_index
]))
3956 file_name
[colon_index
--] = 0;
3959 regexp
= skip_spaces (colon
+ 1);
3963 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3964 old_chain
= make_cleanup_free_search_symbols (&ss
);
3965 make_cleanup (free_current_contents
, &string
);
3967 start_rbreak_breakpoints ();
3968 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3969 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3971 if (p
->msymbol
.minsym
== NULL
)
3973 const char *fullname
= symtab_to_fullname (p
->symtab
);
3975 int newlen
= (strlen (fullname
)
3976 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3981 string
= xrealloc (string
, newlen
);
3984 strcpy (string
, fullname
);
3985 strcat (string
, ":'");
3986 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3987 strcat (string
, "'");
3988 break_command (string
, from_tty
);
3989 print_symbol_info (FUNCTIONS_DOMAIN
,
3993 symtab_to_filename_for_display (p
->symtab
));
3997 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4001 string
= xrealloc (string
, newlen
);
4004 strcpy (string
, "'");
4005 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4006 strcat (string
, "'");
4008 break_command (string
, from_tty
);
4009 printf_filtered ("<function, no debug info> %s;\n",
4010 SYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4014 do_cleanups (old_chain
);
4018 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4020 Either sym_text[sym_text_len] != '(' and then we search for any
4021 symbol starting with SYM_TEXT text.
4023 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4024 be terminated at that point. Partial symbol tables do not have parameters
4028 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4030 int (*ncmp
) (const char *, const char *, size_t);
4032 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4034 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4037 if (sym_text
[sym_text_len
] == '(')
4039 /* User searches for `name(someth...'. Require NAME to be terminated.
4040 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4041 present but accept even parameters presence. In this case this
4042 function is in fact strcmp_iw but whitespace skipping is not supported
4043 for tab completion. */
4045 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4052 /* Free any memory associated with a completion list. */
4055 free_completion_list (VEC (char_ptr
) **list_ptr
)
4060 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4062 VEC_free (char_ptr
, *list_ptr
);
4065 /* Callback for make_cleanup. */
4068 do_free_completion_list (void *list
)
4070 free_completion_list (list
);
4073 /* Helper routine for make_symbol_completion_list. */
4075 static VEC (char_ptr
) *return_val
;
4077 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4078 completion_list_add_name \
4079 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4081 /* Test to see if the symbol specified by SYMNAME (which is already
4082 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4083 characters. If so, add it to the current completion list. */
4086 completion_list_add_name (const char *symname
,
4087 const char *sym_text
, int sym_text_len
,
4088 const char *text
, const char *word
)
4090 /* Clip symbols that cannot match. */
4091 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4094 /* We have a match for a completion, so add SYMNAME to the current list
4095 of matches. Note that the name is moved to freshly malloc'd space. */
4100 if (word
== sym_text
)
4102 new = xmalloc (strlen (symname
) + 5);
4103 strcpy (new, symname
);
4105 else if (word
> sym_text
)
4107 /* Return some portion of symname. */
4108 new = xmalloc (strlen (symname
) + 5);
4109 strcpy (new, symname
+ (word
- sym_text
));
4113 /* Return some of SYM_TEXT plus symname. */
4114 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4115 strncpy (new, word
, sym_text
- word
);
4116 new[sym_text
- word
] = '\0';
4117 strcat (new, symname
);
4120 VEC_safe_push (char_ptr
, return_val
, new);
4124 /* ObjC: In case we are completing on a selector, look as the msymbol
4125 again and feed all the selectors into the mill. */
4128 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4129 const char *sym_text
, int sym_text_len
,
4130 const char *text
, const char *word
)
4132 static char *tmp
= NULL
;
4133 static unsigned int tmplen
= 0;
4135 const char *method
, *category
, *selector
;
4138 method
= SYMBOL_NATURAL_NAME (msymbol
);
4140 /* Is it a method? */
4141 if ((method
[0] != '-') && (method
[0] != '+'))
4144 if (sym_text
[0] == '[')
4145 /* Complete on shortened method method. */
4146 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4148 while ((strlen (method
) + 1) >= tmplen
)
4154 tmp
= xrealloc (tmp
, tmplen
);
4156 selector
= strchr (method
, ' ');
4157 if (selector
!= NULL
)
4160 category
= strchr (method
, '(');
4162 if ((category
!= NULL
) && (selector
!= NULL
))
4164 memcpy (tmp
, method
, (category
- method
));
4165 tmp
[category
- method
] = ' ';
4166 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4167 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4168 if (sym_text
[0] == '[')
4169 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4172 if (selector
!= NULL
)
4174 /* Complete on selector only. */
4175 strcpy (tmp
, selector
);
4176 tmp2
= strchr (tmp
, ']');
4180 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4184 /* Break the non-quoted text based on the characters which are in
4185 symbols. FIXME: This should probably be language-specific. */
4188 language_search_unquoted_string (const char *text
, const char *p
)
4190 for (; p
> text
; --p
)
4192 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
4196 if ((current_language
->la_language
== language_objc
))
4198 if (p
[-1] == ':') /* Might be part of a method name. */
4200 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
4201 p
-= 2; /* Beginning of a method name. */
4202 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
4203 { /* Might be part of a method name. */
4206 /* Seeing a ' ' or a '(' is not conclusive evidence
4207 that we are in the middle of a method name. However,
4208 finding "-[" or "+[" should be pretty un-ambiguous.
4209 Unfortunately we have to find it now to decide. */
4212 if (isalnum (t
[-1]) || t
[-1] == '_' ||
4213 t
[-1] == ' ' || t
[-1] == ':' ||
4214 t
[-1] == '(' || t
[-1] == ')')
4219 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
4220 p
= t
- 2; /* Method name detected. */
4221 /* Else we leave with p unchanged. */
4231 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
4232 int sym_text_len
, const char *text
,
4235 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
4237 struct type
*t
= SYMBOL_TYPE (sym
);
4238 enum type_code c
= TYPE_CODE (t
);
4241 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
4242 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
4243 if (TYPE_FIELD_NAME (t
, j
))
4244 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
4245 sym_text
, sym_text_len
, text
, word
);
4249 /* Type of the user_data argument passed to add_macro_name or
4250 symbol_completion_matcher. The contents are simply whatever is
4251 needed by completion_list_add_name. */
4252 struct add_name_data
4254 const char *sym_text
;
4260 /* A callback used with macro_for_each and macro_for_each_in_scope.
4261 This adds a macro's name to the current completion list. */
4264 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4265 struct macro_source_file
*ignore2
, int ignore3
,
4268 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4270 completion_list_add_name ((char *) name
,
4271 datum
->sym_text
, datum
->sym_text_len
,
4272 datum
->text
, datum
->word
);
4275 /* A callback for expand_symtabs_matching. */
4278 symbol_completion_matcher (const char *name
, void *user_data
)
4280 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4282 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4286 default_make_symbol_completion_list_break_on (const char *text
,
4288 const char *break_on
,
4289 enum type_code code
)
4291 /* Problem: All of the symbols have to be copied because readline
4292 frees them. I'm not going to worry about this; hopefully there
4293 won't be that many. */
4297 struct minimal_symbol
*msymbol
;
4298 struct objfile
*objfile
;
4300 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4301 struct block_iterator iter
;
4302 /* The symbol we are completing on. Points in same buffer as text. */
4303 const char *sym_text
;
4304 /* Length of sym_text. */
4306 struct add_name_data datum
;
4307 struct cleanup
*back_to
;
4309 /* Now look for the symbol we are supposed to complete on. */
4313 const char *quote_pos
= NULL
;
4315 /* First see if this is a quoted string. */
4317 for (p
= text
; *p
!= '\0'; ++p
)
4319 if (quote_found
!= '\0')
4321 if (*p
== quote_found
)
4322 /* Found close quote. */
4324 else if (*p
== '\\' && p
[1] == quote_found
)
4325 /* A backslash followed by the quote character
4326 doesn't end the string. */
4329 else if (*p
== '\'' || *p
== '"')
4335 if (quote_found
== '\'')
4336 /* A string within single quotes can be a symbol, so complete on it. */
4337 sym_text
= quote_pos
+ 1;
4338 else if (quote_found
== '"')
4339 /* A double-quoted string is never a symbol, nor does it make sense
4340 to complete it any other way. */
4346 /* It is not a quoted string. Break it based on the characters
4347 which are in symbols. */
4350 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4351 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4360 sym_text_len
= strlen (sym_text
);
4362 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4364 if (current_language
->la_language
== language_cplus
4365 || current_language
->la_language
== language_java
4366 || current_language
->la_language
== language_fortran
)
4368 /* These languages may have parameters entered by user but they are never
4369 present in the partial symbol tables. */
4371 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4374 sym_text_len
= cs
- sym_text
;
4376 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4379 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4381 datum
.sym_text
= sym_text
;
4382 datum
.sym_text_len
= sym_text_len
;
4386 /* Look through the partial symtabs for all symbols which begin
4387 by matching SYM_TEXT. Expand all CUs that you find to the list.
4388 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4389 expand_symtabs_matching (NULL
, symbol_completion_matcher
, ALL_DOMAIN
,
4392 /* At this point scan through the misc symbol vectors and add each
4393 symbol you find to the list. Eventually we want to ignore
4394 anything that isn't a text symbol (everything else will be
4395 handled by the psymtab code above). */
4397 if (code
== TYPE_CODE_UNDEF
)
4399 ALL_MSYMBOLS (objfile
, msymbol
)
4402 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
4405 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
4410 /* Search upwards from currently selected frame (so that we can
4411 complete on local vars). Also catch fields of types defined in
4412 this places which match our text string. Only complete on types
4413 visible from current context. */
4415 b
= get_selected_block (0);
4416 surrounding_static_block
= block_static_block (b
);
4417 surrounding_global_block
= block_global_block (b
);
4418 if (surrounding_static_block
!= NULL
)
4419 while (b
!= surrounding_static_block
)
4423 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4425 if (code
== TYPE_CODE_UNDEF
)
4427 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4429 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4432 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4433 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
4434 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4438 /* Stop when we encounter an enclosing function. Do not stop for
4439 non-inlined functions - the locals of the enclosing function
4440 are in scope for a nested function. */
4441 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4443 b
= BLOCK_SUPERBLOCK (b
);
4446 /* Add fields from the file's types; symbols will be added below. */
4448 if (code
== TYPE_CODE_UNDEF
)
4450 if (surrounding_static_block
!= NULL
)
4451 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4452 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4454 if (surrounding_global_block
!= NULL
)
4455 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4456 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4459 /* Go through the symtabs and check the externs and statics for
4460 symbols which match. */
4462 ALL_PRIMARY_SYMTABS (objfile
, s
)
4465 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4466 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4468 if (code
== TYPE_CODE_UNDEF
4469 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4470 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4471 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4475 ALL_PRIMARY_SYMTABS (objfile
, s
)
4478 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4479 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4481 if (code
== TYPE_CODE_UNDEF
4482 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4483 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4484 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4488 /* Skip macros if we are completing a struct tag -- arguable but
4489 usually what is expected. */
4490 if (current_language
->la_macro_expansion
== macro_expansion_c
4491 && code
== TYPE_CODE_UNDEF
)
4493 struct macro_scope
*scope
;
4495 /* Add any macros visible in the default scope. Note that this
4496 may yield the occasional wrong result, because an expression
4497 might be evaluated in a scope other than the default. For
4498 example, if the user types "break file:line if <TAB>", the
4499 resulting expression will be evaluated at "file:line" -- but
4500 at there does not seem to be a way to detect this at
4502 scope
= default_macro_scope ();
4505 macro_for_each_in_scope (scope
->file
, scope
->line
,
4506 add_macro_name
, &datum
);
4510 /* User-defined macros are always visible. */
4511 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4514 discard_cleanups (back_to
);
4515 return (return_val
);
4519 default_make_symbol_completion_list (const char *text
, const char *word
,
4520 enum type_code code
)
4522 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
4525 /* Return a vector of all symbols (regardless of class) which begin by
4526 matching TEXT. If the answer is no symbols, then the return value
4530 make_symbol_completion_list (const char *text
, const char *word
)
4532 return current_language
->la_make_symbol_completion_list (text
, word
,
4536 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4537 symbols whose type code is CODE. */
4540 make_symbol_completion_type (const char *text
, const char *word
,
4541 enum type_code code
)
4543 gdb_assert (code
== TYPE_CODE_UNION
4544 || code
== TYPE_CODE_STRUCT
4545 || code
== TYPE_CODE_CLASS
4546 || code
== TYPE_CODE_ENUM
);
4547 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
4550 /* Like make_symbol_completion_list, but suitable for use as a
4551 completion function. */
4554 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4555 const char *text
, const char *word
)
4557 return make_symbol_completion_list (text
, word
);
4560 /* Like make_symbol_completion_list, but returns a list of symbols
4561 defined in a source file FILE. */
4564 make_file_symbol_completion_list (const char *text
, const char *word
,
4565 const char *srcfile
)
4570 struct block_iterator iter
;
4571 /* The symbol we are completing on. Points in same buffer as text. */
4572 const char *sym_text
;
4573 /* Length of sym_text. */
4576 /* Now look for the symbol we are supposed to complete on.
4577 FIXME: This should be language-specific. */
4581 const char *quote_pos
= NULL
;
4583 /* First see if this is a quoted string. */
4585 for (p
= text
; *p
!= '\0'; ++p
)
4587 if (quote_found
!= '\0')
4589 if (*p
== quote_found
)
4590 /* Found close quote. */
4592 else if (*p
== '\\' && p
[1] == quote_found
)
4593 /* A backslash followed by the quote character
4594 doesn't end the string. */
4597 else if (*p
== '\'' || *p
== '"')
4603 if (quote_found
== '\'')
4604 /* A string within single quotes can be a symbol, so complete on it. */
4605 sym_text
= quote_pos
+ 1;
4606 else if (quote_found
== '"')
4607 /* A double-quoted string is never a symbol, nor does it make sense
4608 to complete it any other way. */
4614 /* Not a quoted string. */
4615 sym_text
= language_search_unquoted_string (text
, p
);
4619 sym_text_len
= strlen (sym_text
);
4623 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4625 s
= lookup_symtab (srcfile
);
4628 /* Maybe they typed the file with leading directories, while the
4629 symbol tables record only its basename. */
4630 const char *tail
= lbasename (srcfile
);
4633 s
= lookup_symtab (tail
);
4636 /* If we have no symtab for that file, return an empty list. */
4638 return (return_val
);
4640 /* Go through this symtab and check the externs and statics for
4641 symbols which match. */
4643 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4644 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4646 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4649 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4650 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4652 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4655 return (return_val
);
4658 /* A helper function for make_source_files_completion_list. It adds
4659 another file name to a list of possible completions, growing the
4660 list as necessary. */
4663 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
4664 VEC (char_ptr
) **list
)
4667 size_t fnlen
= strlen (fname
);
4671 /* Return exactly fname. */
4672 new = xmalloc (fnlen
+ 5);
4673 strcpy (new, fname
);
4675 else if (word
> text
)
4677 /* Return some portion of fname. */
4678 new = xmalloc (fnlen
+ 5);
4679 strcpy (new, fname
+ (word
- text
));
4683 /* Return some of TEXT plus fname. */
4684 new = xmalloc (fnlen
+ (text
- word
) + 5);
4685 strncpy (new, word
, text
- word
);
4686 new[text
- word
] = '\0';
4687 strcat (new, fname
);
4689 VEC_safe_push (char_ptr
, *list
, new);
4693 not_interesting_fname (const char *fname
)
4695 static const char *illegal_aliens
[] = {
4696 "_globals_", /* inserted by coff_symtab_read */
4701 for (i
= 0; illegal_aliens
[i
]; i
++)
4703 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4709 /* An object of this type is passed as the user_data argument to
4710 map_partial_symbol_filenames. */
4711 struct add_partial_filename_data
4713 struct filename_seen_cache
*filename_seen_cache
;
4717 VEC (char_ptr
) **list
;
4720 /* A callback for map_partial_symbol_filenames. */
4723 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4726 struct add_partial_filename_data
*data
= user_data
;
4728 if (not_interesting_fname (filename
))
4730 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
4731 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4733 /* This file matches for a completion; add it to the
4734 current list of matches. */
4735 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
4739 const char *base_name
= lbasename (filename
);
4741 if (base_name
!= filename
4742 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
4743 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4744 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
4748 /* Return a vector of all source files whose names begin with matching
4749 TEXT. The file names are looked up in the symbol tables of this
4750 program. If the answer is no matchess, then the return value is
4754 make_source_files_completion_list (const char *text
, const char *word
)
4757 struct objfile
*objfile
;
4758 size_t text_len
= strlen (text
);
4759 VEC (char_ptr
) *list
= NULL
;
4760 const char *base_name
;
4761 struct add_partial_filename_data datum
;
4762 struct filename_seen_cache
*filename_seen_cache
;
4763 struct cleanup
*back_to
, *cache_cleanup
;
4765 if (!have_full_symbols () && !have_partial_symbols ())
4768 back_to
= make_cleanup (do_free_completion_list
, &list
);
4770 filename_seen_cache
= create_filename_seen_cache ();
4771 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
4772 filename_seen_cache
);
4774 ALL_SYMTABS (objfile
, s
)
4776 if (not_interesting_fname (s
->filename
))
4778 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
4779 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4781 /* This file matches for a completion; add it to the current
4783 add_filename_to_list (s
->filename
, text
, word
, &list
);
4787 /* NOTE: We allow the user to type a base name when the
4788 debug info records leading directories, but not the other
4789 way around. This is what subroutines of breakpoint
4790 command do when they parse file names. */
4791 base_name
= lbasename (s
->filename
);
4792 if (base_name
!= s
->filename
4793 && !filename_seen (filename_seen_cache
, base_name
, 1)
4794 && filename_ncmp (base_name
, text
, text_len
) == 0)
4795 add_filename_to_list (base_name
, text
, word
, &list
);
4799 datum
.filename_seen_cache
= filename_seen_cache
;
4802 datum
.text_len
= text_len
;
4804 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4805 0 /*need_fullname*/);
4807 do_cleanups (cache_cleanup
);
4808 discard_cleanups (back_to
);
4813 /* Determine if PC is in the prologue of a function. The prologue is the area
4814 between the first instruction of a function, and the first executable line.
4815 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4817 If non-zero, func_start is where we think the prologue starts, possibly
4818 by previous examination of symbol table information. */
4821 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4823 struct symtab_and_line sal
;
4824 CORE_ADDR func_addr
, func_end
;
4826 /* We have several sources of information we can consult to figure
4828 - Compilers usually emit line number info that marks the prologue
4829 as its own "source line". So the ending address of that "line"
4830 is the end of the prologue. If available, this is the most
4832 - The minimal symbols and partial symbols, which can usually tell
4833 us the starting and ending addresses of a function.
4834 - If we know the function's start address, we can call the
4835 architecture-defined gdbarch_skip_prologue function to analyze the
4836 instruction stream and guess where the prologue ends.
4837 - Our `func_start' argument; if non-zero, this is the caller's
4838 best guess as to the function's entry point. At the time of
4839 this writing, handle_inferior_event doesn't get this right, so
4840 it should be our last resort. */
4842 /* Consult the partial symbol table, to find which function
4844 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4846 CORE_ADDR prologue_end
;
4848 /* We don't even have minsym information, so fall back to using
4849 func_start, if given. */
4851 return 1; /* We *might* be in a prologue. */
4853 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4855 return func_start
<= pc
&& pc
< prologue_end
;
4858 /* If we have line number information for the function, that's
4859 usually pretty reliable. */
4860 sal
= find_pc_line (func_addr
, 0);
4862 /* Now sal describes the source line at the function's entry point,
4863 which (by convention) is the prologue. The end of that "line",
4864 sal.end, is the end of the prologue.
4866 Note that, for functions whose source code is all on a single
4867 line, the line number information doesn't always end up this way.
4868 So we must verify that our purported end-of-prologue address is
4869 *within* the function, not at its start or end. */
4871 || sal
.end
<= func_addr
4872 || func_end
<= sal
.end
)
4874 /* We don't have any good line number info, so use the minsym
4875 information, together with the architecture-specific prologue
4877 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4879 return func_addr
<= pc
&& pc
< prologue_end
;
4882 /* We have line number info, and it looks good. */
4883 return func_addr
<= pc
&& pc
< sal
.end
;
4886 /* Given PC at the function's start address, attempt to find the
4887 prologue end using SAL information. Return zero if the skip fails.
4889 A non-optimized prologue traditionally has one SAL for the function
4890 and a second for the function body. A single line function has
4891 them both pointing at the same line.
4893 An optimized prologue is similar but the prologue may contain
4894 instructions (SALs) from the instruction body. Need to skip those
4895 while not getting into the function body.
4897 The functions end point and an increasing SAL line are used as
4898 indicators of the prologue's endpoint.
4900 This code is based on the function refine_prologue_limit
4904 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4906 struct symtab_and_line prologue_sal
;
4911 /* Get an initial range for the function. */
4912 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4913 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4915 prologue_sal
= find_pc_line (start_pc
, 0);
4916 if (prologue_sal
.line
!= 0)
4918 /* For languages other than assembly, treat two consecutive line
4919 entries at the same address as a zero-instruction prologue.
4920 The GNU assembler emits separate line notes for each instruction
4921 in a multi-instruction macro, but compilers generally will not
4923 if (prologue_sal
.symtab
->language
!= language_asm
)
4925 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4928 /* Skip any earlier lines, and any end-of-sequence marker
4929 from a previous function. */
4930 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4931 || linetable
->item
[idx
].line
== 0)
4934 if (idx
+1 < linetable
->nitems
4935 && linetable
->item
[idx
+1].line
!= 0
4936 && linetable
->item
[idx
+1].pc
== start_pc
)
4940 /* If there is only one sal that covers the entire function,
4941 then it is probably a single line function, like
4943 if (prologue_sal
.end
>= end_pc
)
4946 while (prologue_sal
.end
< end_pc
)
4948 struct symtab_and_line sal
;
4950 sal
= find_pc_line (prologue_sal
.end
, 0);
4953 /* Assume that a consecutive SAL for the same (or larger)
4954 line mark the prologue -> body transition. */
4955 if (sal
.line
>= prologue_sal
.line
)
4957 /* Likewise if we are in a different symtab altogether
4958 (e.g. within a file included via #include). */
4959 if (sal
.symtab
!= prologue_sal
.symtab
)
4962 /* The line number is smaller. Check that it's from the
4963 same function, not something inlined. If it's inlined,
4964 then there is no point comparing the line numbers. */
4965 bl
= block_for_pc (prologue_sal
.end
);
4968 if (block_inlined_p (bl
))
4970 if (BLOCK_FUNCTION (bl
))
4975 bl
= BLOCK_SUPERBLOCK (bl
);
4980 /* The case in which compiler's optimizer/scheduler has
4981 moved instructions into the prologue. We look ahead in
4982 the function looking for address ranges whose
4983 corresponding line number is less the first one that we
4984 found for the function. This is more conservative then
4985 refine_prologue_limit which scans a large number of SALs
4986 looking for any in the prologue. */
4991 if (prologue_sal
.end
< end_pc
)
4992 /* Return the end of this line, or zero if we could not find a
4994 return prologue_sal
.end
;
4996 /* Don't return END_PC, which is past the end of the function. */
4997 return prologue_sal
.pc
;
5001 static char *name_of_main
;
5002 enum language language_of_main
= language_unknown
;
5005 set_main_name (const char *name
)
5007 if (name_of_main
!= NULL
)
5009 xfree (name_of_main
);
5010 name_of_main
= NULL
;
5011 language_of_main
= language_unknown
;
5015 name_of_main
= xstrdup (name
);
5016 language_of_main
= language_unknown
;
5020 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5024 find_main_name (void)
5026 const char *new_main_name
;
5028 /* Try to see if the main procedure is in Ada. */
5029 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5030 be to add a new method in the language vector, and call this
5031 method for each language until one of them returns a non-empty
5032 name. This would allow us to remove this hard-coded call to
5033 an Ada function. It is not clear that this is a better approach
5034 at this point, because all methods need to be written in a way
5035 such that false positives never be returned. For instance, it is
5036 important that a method does not return a wrong name for the main
5037 procedure if the main procedure is actually written in a different
5038 language. It is easy to guaranty this with Ada, since we use a
5039 special symbol generated only when the main in Ada to find the name
5040 of the main procedure. It is difficult however to see how this can
5041 be guarantied for languages such as C, for instance. This suggests
5042 that order of call for these methods becomes important, which means
5043 a more complicated approach. */
5044 new_main_name
= ada_main_name ();
5045 if (new_main_name
!= NULL
)
5047 set_main_name (new_main_name
);
5051 new_main_name
= go_main_name ();
5052 if (new_main_name
!= NULL
)
5054 set_main_name (new_main_name
);
5058 new_main_name
= pascal_main_name ();
5059 if (new_main_name
!= NULL
)
5061 set_main_name (new_main_name
);
5065 /* The languages above didn't identify the name of the main procedure.
5066 Fallback to "main". */
5067 set_main_name ("main");
5073 if (name_of_main
== NULL
)
5076 return name_of_main
;
5079 /* Handle ``executable_changed'' events for the symtab module. */
5082 symtab_observer_executable_changed (void)
5084 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5085 set_main_name (NULL
);
5088 /* Return 1 if the supplied producer string matches the ARM RealView
5089 compiler (armcc). */
5092 producer_is_realview (const char *producer
)
5094 static const char *const arm_idents
[] = {
5095 "ARM C Compiler, ADS",
5096 "Thumb C Compiler, ADS",
5097 "ARM C++ Compiler, ADS",
5098 "Thumb C++ Compiler, ADS",
5099 "ARM/Thumb C/C++ Compiler, RVCT",
5100 "ARM C/C++ Compiler, RVCT"
5104 if (producer
== NULL
)
5107 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5108 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
5116 /* The next index to hand out in response to a registration request. */
5118 static int next_aclass_value
= LOC_FINAL_VALUE
;
5120 /* The maximum number of "aclass" registrations we support. This is
5121 constant for convenience. */
5122 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5124 /* The objects representing the various "aclass" values. The elements
5125 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5126 elements are those registered at gdb initialization time. */
5128 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
5130 /* The globally visible pointer. This is separate from 'symbol_impl'
5131 so that it can be const. */
5133 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
5135 /* Make sure we saved enough room in struct symbol. */
5137 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
5139 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5140 is the ops vector associated with this index. This returns the new
5141 index, which should be used as the aclass_index field for symbols
5145 register_symbol_computed_impl (enum address_class aclass
,
5146 const struct symbol_computed_ops
*ops
)
5148 int result
= next_aclass_value
++;
5150 gdb_assert (aclass
== LOC_COMPUTED
);
5151 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5152 symbol_impl
[result
].aclass
= aclass
;
5153 symbol_impl
[result
].ops_computed
= ops
;
5155 /* Sanity check OPS. */
5156 gdb_assert (ops
!= NULL
);
5157 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
5158 gdb_assert (ops
->describe_location
!= NULL
);
5159 gdb_assert (ops
->read_needs_frame
!= NULL
);
5160 gdb_assert (ops
->read_variable
!= NULL
);
5165 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5166 OPS is the ops vector associated with this index. This returns the
5167 new index, which should be used as the aclass_index field for symbols
5171 register_symbol_block_impl (enum address_class aclass
,
5172 const struct symbol_block_ops
*ops
)
5174 int result
= next_aclass_value
++;
5176 gdb_assert (aclass
== LOC_BLOCK
);
5177 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5178 symbol_impl
[result
].aclass
= aclass
;
5179 symbol_impl
[result
].ops_block
= ops
;
5181 /* Sanity check OPS. */
5182 gdb_assert (ops
!= NULL
);
5183 gdb_assert (ops
->find_frame_base_location
!= NULL
);
5188 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5189 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5190 this index. This returns the new index, which should be used as
5191 the aclass_index field for symbols of this type. */
5194 register_symbol_register_impl (enum address_class aclass
,
5195 const struct symbol_register_ops
*ops
)
5197 int result
= next_aclass_value
++;
5199 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
5200 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5201 symbol_impl
[result
].aclass
= aclass
;
5202 symbol_impl
[result
].ops_register
= ops
;
5207 /* Initialize elements of 'symbol_impl' for the constants in enum
5211 initialize_ordinary_address_classes (void)
5215 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
5216 symbol_impl
[i
].aclass
= i
;
5221 /* Initialize the symbol SYM. */
5224 initialize_symbol (struct symbol
*sym
)
5226 memset (sym
, 0, sizeof (*sym
));
5227 SYMBOL_SECTION (sym
) = -1;
5230 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
5234 allocate_symbol (struct objfile
*objfile
)
5236 struct symbol
*result
;
5238 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5239 SYMBOL_SECTION (result
) = -1;
5244 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
5247 struct template_symbol
*
5248 allocate_template_symbol (struct objfile
*objfile
)
5250 struct template_symbol
*result
;
5252 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
5253 SYMBOL_SECTION (&result
->base
) = -1;
5261 _initialize_symtab (void)
5263 initialize_ordinary_address_classes ();
5265 add_info ("variables", variables_info
, _("\
5266 All global and static variable names, or those matching REGEXP."));
5268 add_com ("whereis", class_info
, variables_info
, _("\
5269 All global and static variable names, or those matching REGEXP."));
5271 add_info ("functions", functions_info
,
5272 _("All function names, or those matching REGEXP."));
5274 /* FIXME: This command has at least the following problems:
5275 1. It prints builtin types (in a very strange and confusing fashion).
5276 2. It doesn't print right, e.g. with
5277 typedef struct foo *FOO
5278 type_print prints "FOO" when we want to make it (in this situation)
5279 print "struct foo *".
5280 I also think "ptype" or "whatis" is more likely to be useful (but if
5281 there is much disagreement "info types" can be fixed). */
5282 add_info ("types", types_info
,
5283 _("All type names, or those matching REGEXP."));
5285 add_info ("sources", sources_info
,
5286 _("Source files in the program."));
5288 add_com ("rbreak", class_breakpoint
, rbreak_command
,
5289 _("Set a breakpoint for all functions matching REGEXP."));
5293 add_com ("lf", class_info
, sources_info
,
5294 _("Source files in the program"));
5295 add_com ("lg", class_info
, variables_info
, _("\
5296 All global and static variable names, or those matching REGEXP."));
5299 add_setshow_enum_cmd ("multiple-symbols", no_class
,
5300 multiple_symbols_modes
, &multiple_symbols_mode
,
5302 Set the debugger behavior when more than one symbol are possible matches\n\
5303 in an expression."), _("\
5304 Show how the debugger handles ambiguities in expressions."), _("\
5305 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5306 NULL
, NULL
, &setlist
, &showlist
);
5308 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
5309 &basenames_may_differ
, _("\
5310 Set whether a source file may have multiple base names."), _("\
5311 Show whether a source file may have multiple base names."), _("\
5312 (A \"base name\" is the name of a file with the directory part removed.\n\
5313 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5314 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5315 before comparing them. Canonicalization is an expensive operation,\n\
5316 but it allows the same file be known by more than one base name.\n\
5317 If not set (the default), all source files are assumed to have just\n\
5318 one base name, and gdb will do file name comparisons more efficiently."),
5320 &setlist
, &showlist
);
5322 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
5323 _("Set debugging of symbol table creation."),
5324 _("Show debugging of symbol table creation."), _("\
5325 When enabled (non-zero), debugging messages are printed when building\n\
5326 symbol tables. A value of 1 (one) normally provides enough information.\n\
5327 A value greater than 1 provides more verbose information."),
5330 &setdebuglist
, &showdebuglist
);
5332 observer_attach_executable_changed (symtab_observer_executable_changed
);