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>
56 #include "cp-support.h"
60 #include "macroscope.h"
62 #include "parser-defs.h"
64 /* Forward declarations for local functions. */
66 static void rbreak_command (char *, int);
68 static int find_line_common (struct linetable
*, int, int *, int);
70 static struct symbol
*lookup_symbol_aux (const char *name
,
71 const struct block
*block
,
72 const domain_enum domain
,
73 enum language language
,
74 struct field_of_this_result
*);
77 struct symbol
*lookup_symbol_aux_local (const char *name
,
78 const struct block
*block
,
79 const domain_enum domain
,
80 enum language language
);
83 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
85 const domain_enum domain
);
88 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
91 const domain_enum domain
);
93 extern initialize_file_ftype _initialize_symtab
;
95 /* Program space key for finding name and language of "main". */
97 static const struct program_space_data
*main_progspace_key
;
99 /* Type of the data stored on the program space. */
103 /* Name of "main". */
107 /* Language of "main". */
109 enum language language_of_main
;
112 /* When non-zero, print debugging messages related to symtab creation. */
113 unsigned int symtab_create_debug
= 0;
115 /* Non-zero if a file may be known by two different basenames.
116 This is the uncommon case, and significantly slows down gdb.
117 Default set to "off" to not slow down the common case. */
118 int basenames_may_differ
= 0;
120 /* Allow the user to configure the debugger behavior with respect
121 to multiple-choice menus when more than one symbol matches during
124 const char multiple_symbols_ask
[] = "ask";
125 const char multiple_symbols_all
[] = "all";
126 const char multiple_symbols_cancel
[] = "cancel";
127 static const char *const multiple_symbols_modes
[] =
129 multiple_symbols_ask
,
130 multiple_symbols_all
,
131 multiple_symbols_cancel
,
134 static const char *multiple_symbols_mode
= multiple_symbols_all
;
136 /* Read-only accessor to AUTO_SELECT_MODE. */
139 multiple_symbols_select_mode (void)
141 return multiple_symbols_mode
;
144 /* Block in which the most recently searched-for symbol was found.
145 Might be better to make this a parameter to lookup_symbol and
148 const struct block
*block_found
;
150 /* Return the name of a domain_enum. */
153 domain_name (domain_enum e
)
157 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
158 case VAR_DOMAIN
: return "VAR_DOMAIN";
159 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
160 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
161 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
162 default: gdb_assert_not_reached ("bad domain_enum");
166 /* Return the name of a search_domain . */
169 search_domain_name (enum search_domain e
)
173 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
174 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
175 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
176 case ALL_DOMAIN
: return "ALL_DOMAIN";
177 default: gdb_assert_not_reached ("bad search_domain");
181 /* Set the primary field in SYMTAB. */
184 set_symtab_primary (struct symtab
*symtab
, int primary
)
186 symtab
->primary
= primary
;
188 if (symtab_create_debug
&& primary
)
190 fprintf_unfiltered (gdb_stdlog
,
191 "Created primary symtab %s for %s.\n",
192 host_address_to_string (symtab
),
193 symtab_to_filename_for_display (symtab
));
197 /* See whether FILENAME matches SEARCH_NAME using the rule that we
198 advertise to the user. (The manual's description of linespecs
199 describes what we advertise). Returns true if they match, false
203 compare_filenames_for_search (const char *filename
, const char *search_name
)
205 int len
= strlen (filename
);
206 size_t search_len
= strlen (search_name
);
208 if (len
< search_len
)
211 /* The tail of FILENAME must match. */
212 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
215 /* Either the names must completely match, or the character
216 preceding the trailing SEARCH_NAME segment of FILENAME must be a
219 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
220 cannot match FILENAME "/path//dir/file.c" - as user has requested
221 absolute path. The sama applies for "c:\file.c" possibly
222 incorrectly hypothetically matching "d:\dir\c:\file.c".
224 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
225 compatible with SEARCH_NAME "file.c". In such case a compiler had
226 to put the "c:file.c" name into debug info. Such compatibility
227 works only on GDB built for DOS host. */
228 return (len
== search_len
229 || (!IS_ABSOLUTE_PATH (search_name
)
230 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
231 || (HAS_DRIVE_SPEC (filename
)
232 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
235 /* Check for a symtab of a specific name by searching some symtabs.
236 This is a helper function for callbacks of iterate_over_symtabs.
238 If NAME is not absolute, then REAL_PATH is NULL
239 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
241 The return value, NAME, REAL_PATH, CALLBACK, and DATA
242 are identical to the `map_symtabs_matching_filename' method of
243 quick_symbol_functions.
245 FIRST and AFTER_LAST indicate the range of symtabs to search.
246 AFTER_LAST is one past the last symtab to search; NULL means to
247 search until the end of the list. */
250 iterate_over_some_symtabs (const char *name
,
251 const char *real_path
,
252 int (*callback
) (struct symtab
*symtab
,
255 struct symtab
*first
,
256 struct symtab
*after_last
)
258 struct symtab
*s
= NULL
;
259 const char* base_name
= lbasename (name
);
261 for (s
= first
; s
!= NULL
&& s
!= after_last
; s
= s
->next
)
263 if (compare_filenames_for_search (s
->filename
, name
))
265 if (callback (s
, data
))
270 /* Before we invoke realpath, which can get expensive when many
271 files are involved, do a quick comparison of the basenames. */
272 if (! basenames_may_differ
273 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
276 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
278 if (callback (s
, data
))
283 /* If the user gave us an absolute path, try to find the file in
284 this symtab and use its absolute path. */
285 if (real_path
!= NULL
)
287 const char *fullname
= symtab_to_fullname (s
);
289 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
290 gdb_assert (IS_ABSOLUTE_PATH (name
));
291 if (FILENAME_CMP (real_path
, fullname
) == 0)
293 if (callback (s
, data
))
303 /* Check for a symtab of a specific name; first in symtabs, then in
304 psymtabs. *If* there is no '/' in the name, a match after a '/'
305 in the symtab filename will also work.
307 Calls CALLBACK with each symtab that is found and with the supplied
308 DATA. If CALLBACK returns true, the search stops. */
311 iterate_over_symtabs (const char *name
,
312 int (*callback
) (struct symtab
*symtab
,
316 struct objfile
*objfile
;
317 char *real_path
= NULL
;
318 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
320 /* Here we are interested in canonicalizing an absolute path, not
321 absolutizing a relative path. */
322 if (IS_ABSOLUTE_PATH (name
))
324 real_path
= gdb_realpath (name
);
325 make_cleanup (xfree
, real_path
);
326 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
329 ALL_OBJFILES (objfile
)
331 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
332 objfile
->symtabs
, NULL
))
334 do_cleanups (cleanups
);
339 /* Same search rules as above apply here, but now we look thru the
342 ALL_OBJFILES (objfile
)
345 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
351 do_cleanups (cleanups
);
356 do_cleanups (cleanups
);
359 /* The callback function used by lookup_symtab. */
362 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
364 struct symtab
**result_ptr
= data
;
366 *result_ptr
= symtab
;
370 /* A wrapper for iterate_over_symtabs that returns the first matching
374 lookup_symtab (const char *name
)
376 struct symtab
*result
= NULL
;
378 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
383 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
384 full method name, which consist of the class name (from T), the unadorned
385 method name from METHOD_ID, and the signature for the specific overload,
386 specified by SIGNATURE_ID. Note that this function is g++ specific. */
389 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
391 int mangled_name_len
;
393 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
394 struct fn_field
*method
= &f
[signature_id
];
395 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
396 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
397 const char *newname
= type_name_no_tag (type
);
399 /* Does the form of physname indicate that it is the full mangled name
400 of a constructor (not just the args)? */
401 int is_full_physname_constructor
;
404 int is_destructor
= is_destructor_name (physname
);
405 /* Need a new type prefix. */
406 char *const_prefix
= method
->is_const
? "C" : "";
407 char *volatile_prefix
= method
->is_volatile
? "V" : "";
409 int len
= (newname
== NULL
? 0 : strlen (newname
));
411 /* Nothing to do if physname already contains a fully mangled v3 abi name
412 or an operator name. */
413 if ((physname
[0] == '_' && physname
[1] == 'Z')
414 || is_operator_name (field_name
))
415 return xstrdup (physname
);
417 is_full_physname_constructor
= is_constructor_name (physname
);
419 is_constructor
= is_full_physname_constructor
420 || (newname
&& strcmp (field_name
, newname
) == 0);
423 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
425 if (is_destructor
|| is_full_physname_constructor
)
427 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
428 strcpy (mangled_name
, physname
);
434 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
436 else if (physname
[0] == 't' || physname
[0] == 'Q')
438 /* The physname for template and qualified methods already includes
440 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
446 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
447 volatile_prefix
, len
);
449 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
450 + strlen (buf
) + len
+ strlen (physname
) + 1);
452 mangled_name
= (char *) xmalloc (mangled_name_len
);
454 mangled_name
[0] = '\0';
456 strcpy (mangled_name
, field_name
);
458 strcat (mangled_name
, buf
);
459 /* If the class doesn't have a name, i.e. newname NULL, then we just
460 mangle it using 0 for the length of the class. Thus it gets mangled
461 as something starting with `::' rather than `classname::'. */
463 strcat (mangled_name
, newname
);
465 strcat (mangled_name
, physname
);
466 return (mangled_name
);
469 /* Initialize the cplus_specific structure. 'cplus_specific' should
470 only be allocated for use with cplus symbols. */
473 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
474 struct obstack
*obstack
)
476 /* A language_specific structure should not have been previously
478 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
479 gdb_assert (obstack
!= NULL
);
481 gsymbol
->language_specific
.cplus_specific
=
482 OBSTACK_ZALLOC (obstack
, struct cplus_specific
);
485 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
486 correctly allocated. For C++ symbols a cplus_specific struct is
487 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
488 OBJFILE can be NULL. */
491 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
493 struct obstack
*obstack
)
495 if (gsymbol
->language
== language_cplus
)
497 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
498 symbol_init_cplus_specific (gsymbol
, obstack
);
500 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
502 else if (gsymbol
->language
== language_ada
)
506 gsymbol
->ada_mangled
= 0;
507 gsymbol
->language_specific
.obstack
= obstack
;
511 gsymbol
->ada_mangled
= 1;
512 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
516 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
519 /* Return the demangled name of GSYMBOL. */
522 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
524 if (gsymbol
->language
== language_cplus
)
526 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
527 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
531 else if (gsymbol
->language
== language_ada
)
533 if (!gsymbol
->ada_mangled
)
538 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
542 /* Initialize the language dependent portion of a symbol
543 depending upon the language for the symbol. */
546 symbol_set_language (struct general_symbol_info
*gsymbol
,
547 enum language language
,
548 struct obstack
*obstack
)
550 gsymbol
->language
= language
;
551 if (gsymbol
->language
== language_d
552 || gsymbol
->language
== language_go
553 || gsymbol
->language
== language_java
554 || gsymbol
->language
== language_objc
555 || gsymbol
->language
== language_fortran
)
557 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
559 else if (gsymbol
->language
== language_ada
)
561 gdb_assert (gsymbol
->ada_mangled
== 0);
562 gsymbol
->language_specific
.obstack
= obstack
;
564 else if (gsymbol
->language
== language_cplus
)
565 gsymbol
->language_specific
.cplus_specific
= NULL
;
568 memset (&gsymbol
->language_specific
, 0,
569 sizeof (gsymbol
->language_specific
));
573 /* Functions to initialize a symbol's mangled name. */
575 /* Objects of this type are stored in the demangled name hash table. */
576 struct demangled_name_entry
582 /* Hash function for the demangled name hash. */
585 hash_demangled_name_entry (const void *data
)
587 const struct demangled_name_entry
*e
= data
;
589 return htab_hash_string (e
->mangled
);
592 /* Equality function for the demangled name hash. */
595 eq_demangled_name_entry (const void *a
, const void *b
)
597 const struct demangled_name_entry
*da
= a
;
598 const struct demangled_name_entry
*db
= b
;
600 return strcmp (da
->mangled
, db
->mangled
) == 0;
603 /* Create the hash table used for demangled names. Each hash entry is
604 a pair of strings; one for the mangled name and one for the demangled
605 name. The entry is hashed via just the mangled name. */
608 create_demangled_names_hash (struct objfile
*objfile
)
610 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
611 The hash table code will round this up to the next prime number.
612 Choosing a much larger table size wastes memory, and saves only about
613 1% in symbol reading. */
615 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
616 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
617 NULL
, xcalloc
, xfree
);
620 /* Try to determine the demangled name for a symbol, based on the
621 language of that symbol. If the language is set to language_auto,
622 it will attempt to find any demangling algorithm that works and
623 then set the language appropriately. The returned name is allocated
624 by the demangler and should be xfree'd. */
627 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
630 char *demangled
= NULL
;
632 if (gsymbol
->language
== language_unknown
)
633 gsymbol
->language
= language_auto
;
635 if (gsymbol
->language
== language_objc
636 || gsymbol
->language
== language_auto
)
639 objc_demangle (mangled
, 0);
640 if (demangled
!= NULL
)
642 gsymbol
->language
= language_objc
;
646 if (gsymbol
->language
== language_cplus
647 || gsymbol
->language
== language_auto
)
650 gdb_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
651 if (demangled
!= NULL
)
653 gsymbol
->language
= language_cplus
;
657 if (gsymbol
->language
== language_java
)
660 gdb_demangle (mangled
,
661 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
662 if (demangled
!= NULL
)
664 gsymbol
->language
= language_java
;
668 if (gsymbol
->language
== language_d
669 || gsymbol
->language
== language_auto
)
671 demangled
= d_demangle(mangled
, 0);
672 if (demangled
!= NULL
)
674 gsymbol
->language
= language_d
;
678 /* FIXME(dje): Continually adding languages here is clumsy.
679 Better to just call la_demangle if !auto, and if auto then call
680 a utility routine that tries successive languages in turn and reports
681 which one it finds. I realize the la_demangle options may be different
682 for different languages but there's already a FIXME for that. */
683 if (gsymbol
->language
== language_go
684 || gsymbol
->language
== language_auto
)
686 demangled
= go_demangle (mangled
, 0);
687 if (demangled
!= NULL
)
689 gsymbol
->language
= language_go
;
694 /* We could support `gsymbol->language == language_fortran' here to provide
695 module namespaces also for inferiors with only minimal symbol table (ELF
696 symbols). Just the mangling standard is not standardized across compilers
697 and there is no DW_AT_producer available for inferiors with only the ELF
698 symbols to check the mangling kind. */
700 /* Check for Ada symbols last. See comment below explaining why. */
702 if (gsymbol
->language
== language_auto
)
704 const char *demangled
= ada_decode (mangled
);
706 if (demangled
!= mangled
&& demangled
!= NULL
&& demangled
[0] != '<')
708 /* Set the gsymbol language to Ada, but still return NULL.
709 Two reasons for that:
711 1. For Ada, we prefer computing the symbol's decoded name
712 on the fly rather than pre-compute it, in order to save
713 memory (Ada projects are typically very large).
715 2. There are some areas in the definition of the GNAT
716 encoding where, with a bit of bad luck, we might be able
717 to decode a non-Ada symbol, generating an incorrect
718 demangled name (Eg: names ending with "TB" for instance
719 are identified as task bodies and so stripped from
720 the decoded name returned).
722 Returning NULL, here, helps us get a little bit of
723 the best of both worlds. Because we're last, we should
724 not affect any of the other languages that were able to
725 demangle the symbol before us; we get to correctly tag
726 Ada symbols as such; and even if we incorrectly tagged
727 a non-Ada symbol, which should be rare, any routing
728 through the Ada language should be transparent (Ada
729 tries to behave much like C/C++ with non-Ada symbols). */
730 gsymbol
->language
= language_ada
;
738 /* Set both the mangled and demangled (if any) names for GSYMBOL based
739 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
740 objfile's obstack; but if COPY_NAME is 0 and if NAME is
741 NUL-terminated, then this function assumes that NAME is already
742 correctly saved (either permanently or with a lifetime tied to the
743 objfile), and it will not be copied.
745 The hash table corresponding to OBJFILE is used, and the memory
746 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
747 so the pointer can be discarded after calling this function. */
749 /* We have to be careful when dealing with Java names: when we run
750 into a Java minimal symbol, we don't know it's a Java symbol, so it
751 gets demangled as a C++ name. This is unfortunate, but there's not
752 much we can do about it: but when demangling partial symbols and
753 regular symbols, we'd better not reuse the wrong demangled name.
754 (See PR gdb/1039.) We solve this by putting a distinctive prefix
755 on Java names when storing them in the hash table. */
757 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
758 don't mind the Java prefix so much: different languages have
759 different demangling requirements, so it's only natural that we
760 need to keep language data around in our demangling cache. But
761 it's not good that the minimal symbol has the wrong demangled name.
762 Unfortunately, I can't think of any easy solution to that
765 #define JAVA_PREFIX "##JAVA$$"
766 #define JAVA_PREFIX_LEN 8
769 symbol_set_names (struct general_symbol_info
*gsymbol
,
770 const char *linkage_name
, int len
, int copy_name
,
771 struct objfile
*objfile
)
773 struct demangled_name_entry
**slot
;
774 /* A 0-terminated copy of the linkage name. */
775 const char *linkage_name_copy
;
776 /* A copy of the linkage name that might have a special Java prefix
777 added to it, for use when looking names up in the hash table. */
778 const char *lookup_name
;
779 /* The length of lookup_name. */
781 struct demangled_name_entry entry
;
782 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
784 if (gsymbol
->language
== language_ada
)
786 /* In Ada, we do the symbol lookups using the mangled name, so
787 we can save some space by not storing the demangled name.
789 As a side note, we have also observed some overlap between
790 the C++ mangling and Ada mangling, similarly to what has
791 been observed with Java. Because we don't store the demangled
792 name with the symbol, we don't need to use the same trick
795 gsymbol
->name
= linkage_name
;
798 char *name
= obstack_alloc (&per_bfd
->storage_obstack
, len
+ 1);
800 memcpy (name
, linkage_name
, len
);
802 gsymbol
->name
= name
;
804 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
809 if (per_bfd
->demangled_names_hash
== NULL
)
810 create_demangled_names_hash (objfile
);
812 /* The stabs reader generally provides names that are not
813 NUL-terminated; most of the other readers don't do this, so we
814 can just use the given copy, unless we're in the Java case. */
815 if (gsymbol
->language
== language_java
)
819 lookup_len
= len
+ JAVA_PREFIX_LEN
;
820 alloc_name
= alloca (lookup_len
+ 1);
821 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
822 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
823 alloc_name
[lookup_len
] = '\0';
825 lookup_name
= alloc_name
;
826 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
828 else if (linkage_name
[len
] != '\0')
833 alloc_name
= alloca (lookup_len
+ 1);
834 memcpy (alloc_name
, linkage_name
, len
);
835 alloc_name
[lookup_len
] = '\0';
837 lookup_name
= alloc_name
;
838 linkage_name_copy
= alloc_name
;
843 lookup_name
= linkage_name
;
844 linkage_name_copy
= linkage_name
;
847 entry
.mangled
= lookup_name
;
848 slot
= ((struct demangled_name_entry
**)
849 htab_find_slot (per_bfd
->demangled_names_hash
,
852 /* If this name is not in the hash table, add it. */
854 /* A C version of the symbol may have already snuck into the table.
855 This happens to, e.g., main.init (__go_init_main). Cope. */
856 || (gsymbol
->language
== language_go
857 && (*slot
)->demangled
[0] == '\0'))
859 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
861 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
863 /* Suppose we have demangled_name==NULL, copy_name==0, and
864 lookup_name==linkage_name. In this case, we already have the
865 mangled name saved, and we don't have a demangled name. So,
866 you might think we could save a little space by not recording
867 this in the hash table at all.
869 It turns out that it is actually important to still save such
870 an entry in the hash table, because storing this name gives
871 us better bcache hit rates for partial symbols. */
872 if (!copy_name
&& lookup_name
== linkage_name
)
874 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
875 offsetof (struct demangled_name_entry
,
877 + demangled_len
+ 1);
878 (*slot
)->mangled
= lookup_name
;
884 /* If we must copy the mangled name, put it directly after
885 the demangled name so we can have a single
887 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
888 offsetof (struct demangled_name_entry
,
890 + lookup_len
+ demangled_len
+ 2);
891 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
892 strcpy (mangled_ptr
, lookup_name
);
893 (*slot
)->mangled
= mangled_ptr
;
896 if (demangled_name
!= NULL
)
898 strcpy ((*slot
)->demangled
, demangled_name
);
899 xfree (demangled_name
);
902 (*slot
)->demangled
[0] = '\0';
905 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
906 if ((*slot
)->demangled
[0] != '\0')
907 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
908 &per_bfd
->storage_obstack
);
910 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
913 /* Return the source code name of a symbol. In languages where
914 demangling is necessary, this is the demangled name. */
917 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
919 switch (gsymbol
->language
)
926 case language_fortran
:
927 if (symbol_get_demangled_name (gsymbol
) != NULL
)
928 return symbol_get_demangled_name (gsymbol
);
931 return ada_decode_symbol (gsymbol
);
935 return gsymbol
->name
;
938 /* Return the demangled name for a symbol based on the language for
939 that symbol. If no demangled name exists, return NULL. */
942 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
944 const char *dem_name
= NULL
;
946 switch (gsymbol
->language
)
953 case language_fortran
:
954 dem_name
= symbol_get_demangled_name (gsymbol
);
957 dem_name
= ada_decode_symbol (gsymbol
);
965 /* Return the search name of a symbol---generally the demangled or
966 linkage name of the symbol, depending on how it will be searched for.
967 If there is no distinct demangled name, then returns the same value
968 (same pointer) as SYMBOL_LINKAGE_NAME. */
971 symbol_search_name (const struct general_symbol_info
*gsymbol
)
973 if (gsymbol
->language
== language_ada
)
974 return gsymbol
->name
;
976 return symbol_natural_name (gsymbol
);
979 /* Initialize the structure fields to zero values. */
982 init_sal (struct symtab_and_line
*sal
)
984 memset (sal
, 0, sizeof (*sal
));
988 /* Return 1 if the two sections are the same, or if they could
989 plausibly be copies of each other, one in an original object
990 file and another in a separated debug file. */
993 matching_obj_sections (struct obj_section
*obj_first
,
994 struct obj_section
*obj_second
)
996 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
997 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1000 /* If they're the same section, then they match. */
1001 if (first
== second
)
1004 /* If either is NULL, give up. */
1005 if (first
== NULL
|| second
== NULL
)
1008 /* This doesn't apply to absolute symbols. */
1009 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1012 /* If they're in the same object file, they must be different sections. */
1013 if (first
->owner
== second
->owner
)
1016 /* Check whether the two sections are potentially corresponding. They must
1017 have the same size, address, and name. We can't compare section indexes,
1018 which would be more reliable, because some sections may have been
1020 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
1023 /* In-memory addresses may start at a different offset, relativize them. */
1024 if (bfd_get_section_vma (first
->owner
, first
)
1025 - bfd_get_start_address (first
->owner
)
1026 != bfd_get_section_vma (second
->owner
, second
)
1027 - bfd_get_start_address (second
->owner
))
1030 if (bfd_get_section_name (first
->owner
, first
) == NULL
1031 || bfd_get_section_name (second
->owner
, second
) == NULL
1032 || strcmp (bfd_get_section_name (first
->owner
, first
),
1033 bfd_get_section_name (second
->owner
, second
)) != 0)
1036 /* Otherwise check that they are in corresponding objfiles. */
1039 if (obj
->obfd
== first
->owner
)
1041 gdb_assert (obj
!= NULL
);
1043 if (obj
->separate_debug_objfile
!= NULL
1044 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1046 if (obj
->separate_debug_objfile_backlink
!= NULL
1047 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1054 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
1056 struct objfile
*objfile
;
1057 struct bound_minimal_symbol msymbol
;
1059 /* If we know that this is not a text address, return failure. This is
1060 necessary because we loop based on texthigh and textlow, which do
1061 not include the data ranges. */
1062 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1064 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1065 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1066 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1067 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1068 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1071 ALL_OBJFILES (objfile
)
1073 struct symtab
*result
= NULL
;
1076 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
1085 /* Debug symbols usually don't have section information. We need to dig that
1086 out of the minimal symbols and stash that in the debug symbol. */
1089 fixup_section (struct general_symbol_info
*ginfo
,
1090 CORE_ADDR addr
, struct objfile
*objfile
)
1092 struct minimal_symbol
*msym
;
1094 /* First, check whether a minimal symbol with the same name exists
1095 and points to the same address. The address check is required
1096 e.g. on PowerPC64, where the minimal symbol for a function will
1097 point to the function descriptor, while the debug symbol will
1098 point to the actual function code. */
1099 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1101 ginfo
->section
= MSYMBOL_SECTION (msym
);
1104 /* Static, function-local variables do appear in the linker
1105 (minimal) symbols, but are frequently given names that won't
1106 be found via lookup_minimal_symbol(). E.g., it has been
1107 observed in frv-uclinux (ELF) executables that a static,
1108 function-local variable named "foo" might appear in the
1109 linker symbols as "foo.6" or "foo.3". Thus, there is no
1110 point in attempting to extend the lookup-by-name mechanism to
1111 handle this case due to the fact that there can be multiple
1114 So, instead, search the section table when lookup by name has
1115 failed. The ``addr'' and ``endaddr'' fields may have already
1116 been relocated. If so, the relocation offset (i.e. the
1117 ANOFFSET value) needs to be subtracted from these values when
1118 performing the comparison. We unconditionally subtract it,
1119 because, when no relocation has been performed, the ANOFFSET
1120 value will simply be zero.
1122 The address of the symbol whose section we're fixing up HAS
1123 NOT BEEN adjusted (relocated) yet. It can't have been since
1124 the section isn't yet known and knowing the section is
1125 necessary in order to add the correct relocation value. In
1126 other words, we wouldn't even be in this function (attempting
1127 to compute the section) if it were already known.
1129 Note that it is possible to search the minimal symbols
1130 (subtracting the relocation value if necessary) to find the
1131 matching minimal symbol, but this is overkill and much less
1132 efficient. It is not necessary to find the matching minimal
1133 symbol, only its section.
1135 Note that this technique (of doing a section table search)
1136 can fail when unrelocated section addresses overlap. For
1137 this reason, we still attempt a lookup by name prior to doing
1138 a search of the section table. */
1140 struct obj_section
*s
;
1143 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1145 int idx
= s
- objfile
->sections
;
1146 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1151 if (obj_section_addr (s
) - offset
<= addr
1152 && addr
< obj_section_endaddr (s
) - offset
)
1154 ginfo
->section
= idx
;
1159 /* If we didn't find the section, assume it is in the first
1160 section. If there is no allocated section, then it hardly
1161 matters what we pick, so just pick zero. */
1165 ginfo
->section
= fallback
;
1170 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1177 /* We either have an OBJFILE, or we can get at it from the sym's
1178 symtab. Anything else is a bug. */
1179 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1181 if (objfile
== NULL
)
1182 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1184 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1187 /* We should have an objfile by now. */
1188 gdb_assert (objfile
);
1190 switch (SYMBOL_CLASS (sym
))
1194 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1197 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1201 /* Nothing else will be listed in the minsyms -- no use looking
1206 fixup_section (&sym
->ginfo
, addr
, objfile
);
1211 /* Compute the demangled form of NAME as used by the various symbol
1212 lookup functions. The result is stored in *RESULT_NAME. Returns a
1213 cleanup which can be used to clean up the result.
1215 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1216 Normally, Ada symbol lookups are performed using the encoded name
1217 rather than the demangled name, and so it might seem to make sense
1218 for this function to return an encoded version of NAME.
1219 Unfortunately, we cannot do this, because this function is used in
1220 circumstances where it is not appropriate to try to encode NAME.
1221 For instance, when displaying the frame info, we demangle the name
1222 of each parameter, and then perform a symbol lookup inside our
1223 function using that demangled name. In Ada, certain functions
1224 have internally-generated parameters whose name contain uppercase
1225 characters. Encoding those name would result in those uppercase
1226 characters to become lowercase, and thus cause the symbol lookup
1230 demangle_for_lookup (const char *name
, enum language lang
,
1231 const char **result_name
)
1233 char *demangled_name
= NULL
;
1234 const char *modified_name
= NULL
;
1235 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1237 modified_name
= name
;
1239 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1240 lookup, so we can always binary search. */
1241 if (lang
== language_cplus
)
1243 demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1246 modified_name
= demangled_name
;
1247 make_cleanup (xfree
, demangled_name
);
1251 /* If we were given a non-mangled name, canonicalize it
1252 according to the language (so far only for C++). */
1253 demangled_name
= cp_canonicalize_string (name
);
1256 modified_name
= demangled_name
;
1257 make_cleanup (xfree
, demangled_name
);
1261 else if (lang
== language_java
)
1263 demangled_name
= gdb_demangle (name
,
1264 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1267 modified_name
= demangled_name
;
1268 make_cleanup (xfree
, demangled_name
);
1271 else if (lang
== language_d
)
1273 demangled_name
= d_demangle (name
, 0);
1276 modified_name
= demangled_name
;
1277 make_cleanup (xfree
, demangled_name
);
1280 else if (lang
== language_go
)
1282 demangled_name
= go_demangle (name
, 0);
1285 modified_name
= demangled_name
;
1286 make_cleanup (xfree
, demangled_name
);
1290 *result_name
= modified_name
;
1296 This function (or rather its subordinates) have a bunch of loops and
1297 it would seem to be attractive to put in some QUIT's (though I'm not really
1298 sure whether it can run long enough to be really important). But there
1299 are a few calls for which it would appear to be bad news to quit
1300 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1301 that there is C++ code below which can error(), but that probably
1302 doesn't affect these calls since they are looking for a known
1303 variable and thus can probably assume it will never hit the C++
1307 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1308 const domain_enum domain
, enum language lang
,
1309 struct field_of_this_result
*is_a_field_of_this
)
1311 const char *modified_name
;
1312 struct symbol
*returnval
;
1313 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1315 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1316 is_a_field_of_this
);
1317 do_cleanups (cleanup
);
1325 lookup_symbol (const char *name
, const struct block
*block
,
1327 struct field_of_this_result
*is_a_field_of_this
)
1329 return lookup_symbol_in_language (name
, block
, domain
,
1330 current_language
->la_language
,
1331 is_a_field_of_this
);
1337 lookup_language_this (const struct language_defn
*lang
,
1338 const struct block
*block
)
1340 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1347 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1350 block_found
= block
;
1353 if (BLOCK_FUNCTION (block
))
1355 block
= BLOCK_SUPERBLOCK (block
);
1361 /* Given TYPE, a structure/union,
1362 return 1 if the component named NAME from the ultimate target
1363 structure/union is defined, otherwise, return 0. */
1366 check_field (struct type
*type
, const char *name
,
1367 struct field_of_this_result
*is_a_field_of_this
)
1371 /* The type may be a stub. */
1372 CHECK_TYPEDEF (type
);
1374 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1376 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1378 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
1380 is_a_field_of_this
->type
= type
;
1381 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
1386 /* C++: If it was not found as a data field, then try to return it
1387 as a pointer to a method. */
1389 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
1391 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
1393 is_a_field_of_this
->type
= type
;
1394 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
1399 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
1400 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
1406 /* Behave like lookup_symbol except that NAME is the natural name
1407 (e.g., demangled name) of the symbol that we're looking for. */
1409 static struct symbol
*
1410 lookup_symbol_aux (const char *name
, const struct block
*block
,
1411 const domain_enum domain
, enum language language
,
1412 struct field_of_this_result
*is_a_field_of_this
)
1415 const struct language_defn
*langdef
;
1417 /* Make sure we do something sensible with is_a_field_of_this, since
1418 the callers that set this parameter to some non-null value will
1419 certainly use it later. If we don't set it, the contents of
1420 is_a_field_of_this are undefined. */
1421 if (is_a_field_of_this
!= NULL
)
1422 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
1424 /* Search specified block and its superiors. Don't search
1425 STATIC_BLOCK or GLOBAL_BLOCK. */
1427 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1431 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1432 check to see if NAME is a field of `this'. */
1434 langdef
= language_def (language
);
1436 /* Don't do this check if we are searching for a struct. It will
1437 not be found by check_field, but will be found by other
1439 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
1441 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1445 struct type
*t
= sym
->type
;
1447 /* I'm not really sure that type of this can ever
1448 be typedefed; just be safe. */
1450 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1451 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1452 t
= TYPE_TARGET_TYPE (t
);
1454 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1455 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1456 error (_("Internal error: `%s' is not an aggregate"),
1457 langdef
->la_name_of_this
);
1459 if (check_field (t
, name
, is_a_field_of_this
))
1464 /* Now do whatever is appropriate for LANGUAGE to look
1465 up static and global variables. */
1467 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1471 /* Now search all static file-level symbols. Not strictly correct,
1472 but more useful than an error. */
1474 return lookup_static_symbol_aux (name
, domain
);
1480 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1482 struct objfile
*objfile
;
1485 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1489 ALL_OBJFILES (objfile
)
1491 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1499 /* Check to see if the symbol is defined in BLOCK or its superiors.
1500 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1502 static struct symbol
*
1503 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1504 const domain_enum domain
,
1505 enum language language
)
1508 const struct block
*static_block
= block_static_block (block
);
1509 const char *scope
= block_scope (block
);
1511 /* Check if either no block is specified or it's a global block. */
1513 if (static_block
== NULL
)
1516 while (block
!= static_block
)
1518 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1522 if (language
== language_cplus
|| language
== language_fortran
)
1524 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1530 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1532 block
= BLOCK_SUPERBLOCK (block
);
1535 /* We've reached the edge of the function without finding a result. */
1543 lookup_objfile_from_block (const struct block
*block
)
1545 struct objfile
*obj
;
1551 block
= block_global_block (block
);
1552 /* Go through SYMTABS. */
1553 ALL_SYMTABS (obj
, s
)
1554 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1556 if (obj
->separate_debug_objfile_backlink
)
1557 obj
= obj
->separate_debug_objfile_backlink
;
1568 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1569 const domain_enum domain
)
1573 sym
= lookup_block_symbol (block
, name
, domain
);
1576 block_found
= block
;
1577 return fixup_symbol_section (sym
, NULL
);
1586 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1588 const domain_enum domain
)
1590 const struct objfile
*objfile
;
1592 const struct blockvector
*bv
;
1593 const struct block
*block
;
1596 for (objfile
= main_objfile
;
1598 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1600 /* Go through symtabs. */
1601 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1603 bv
= BLOCKVECTOR (s
);
1604 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1605 sym
= lookup_block_symbol (block
, name
, domain
);
1608 block_found
= block
;
1609 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1613 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1622 /* Check to see if the symbol is defined in one of the OBJFILE's
1623 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1624 depending on whether or not we want to search global symbols or
1627 static struct symbol
*
1628 lookup_symbol_aux_objfile (struct objfile
*objfile
, int block_index
,
1629 const char *name
, const domain_enum domain
)
1631 struct symbol
*sym
= NULL
;
1632 const struct blockvector
*bv
;
1633 const struct block
*block
;
1636 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1638 bv
= BLOCKVECTOR (s
);
1639 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1640 sym
= lookup_block_symbol (block
, name
, domain
);
1643 block_found
= block
;
1644 return fixup_symbol_section (sym
, objfile
);
1651 /* Same as lookup_symbol_aux_objfile, except that it searches all
1652 objfiles. Return the first match found. */
1654 static struct symbol
*
1655 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1656 const domain_enum domain
)
1659 struct objfile
*objfile
;
1661 ALL_OBJFILES (objfile
)
1663 sym
= lookup_symbol_aux_objfile (objfile
, block_index
, name
, domain
);
1671 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1672 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1673 and all related objfiles. */
1675 static struct symbol
*
1676 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
1677 const char *linkage_name
,
1680 enum language lang
= current_language
->la_language
;
1681 const char *modified_name
;
1682 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
1684 struct objfile
*main_objfile
, *cur_objfile
;
1686 if (objfile
->separate_debug_objfile_backlink
)
1687 main_objfile
= objfile
->separate_debug_objfile_backlink
;
1689 main_objfile
= objfile
;
1691 for (cur_objfile
= main_objfile
;
1693 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
1697 sym
= lookup_symbol_aux_objfile (cur_objfile
, GLOBAL_BLOCK
,
1698 modified_name
, domain
);
1700 sym
= lookup_symbol_aux_objfile (cur_objfile
, STATIC_BLOCK
,
1701 modified_name
, domain
);
1704 do_cleanups (cleanup
);
1709 do_cleanups (cleanup
);
1713 /* A helper function that throws an exception when a symbol was found
1714 in a psymtab but not in a symtab. */
1716 static void ATTRIBUTE_NORETURN
1717 error_in_psymtab_expansion (int kind
, const char *name
, struct symtab
*symtab
)
1720 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1721 %s may be an inlined function, or may be a template function\n \
1722 (if a template, try specifying an instantiation: %s<type>)."),
1723 kind
== GLOBAL_BLOCK
? "global" : "static",
1724 name
, symtab_to_filename_for_display (symtab
), name
, name
);
1727 /* A helper function for lookup_symbol_aux that interfaces with the
1728 "quick" symbol table functions. */
1730 static struct symbol
*
1731 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1732 const char *name
, const domain_enum domain
)
1734 struct symtab
*symtab
;
1735 const struct blockvector
*bv
;
1736 const struct block
*block
;
1741 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1745 bv
= BLOCKVECTOR (symtab
);
1746 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1747 sym
= lookup_block_symbol (block
, name
, domain
);
1749 error_in_psymtab_expansion (kind
, name
, symtab
);
1750 block_found
= block
;
1751 return fixup_symbol_section (sym
, objfile
);
1757 basic_lookup_symbol_nonlocal (const char *name
,
1758 const struct block
*block
,
1759 const domain_enum domain
)
1763 /* NOTE: carlton/2003-05-19: The comments below were written when
1764 this (or what turned into this) was part of lookup_symbol_aux;
1765 I'm much less worried about these questions now, since these
1766 decisions have turned out well, but I leave these comments here
1769 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1770 not it would be appropriate to search the current global block
1771 here as well. (That's what this code used to do before the
1772 is_a_field_of_this check was moved up.) On the one hand, it's
1773 redundant with the lookup_symbol_aux_symtabs search that happens
1774 next. On the other hand, if decode_line_1 is passed an argument
1775 like filename:var, then the user presumably wants 'var' to be
1776 searched for in filename. On the third hand, there shouldn't be
1777 multiple global variables all of which are named 'var', and it's
1778 not like decode_line_1 has ever restricted its search to only
1779 global variables in a single filename. All in all, only
1780 searching the static block here seems best: it's correct and it's
1783 /* NOTE: carlton/2002-12-05: There's also a possible performance
1784 issue here: if you usually search for global symbols in the
1785 current file, then it would be slightly better to search the
1786 current global block before searching all the symtabs. But there
1787 are other factors that have a much greater effect on performance
1788 than that one, so I don't think we should worry about that for
1791 sym
= lookup_symbol_static (name
, block
, domain
);
1795 return lookup_symbol_global (name
, block
, domain
);
1801 lookup_symbol_static (const char *name
,
1802 const struct block
*block
,
1803 const domain_enum domain
)
1805 const struct block
*static_block
= block_static_block (block
);
1807 if (static_block
!= NULL
)
1808 return lookup_symbol_aux_block (name
, static_block
, domain
);
1813 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1815 struct global_sym_lookup_data
1817 /* The name of the symbol we are searching for. */
1820 /* The domain to use for our search. */
1823 /* The field where the callback should store the symbol if found.
1824 It should be initialized to NULL before the search is started. */
1825 struct symbol
*result
;
1828 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1829 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1830 OBJFILE. The arguments for the search are passed via CB_DATA,
1831 which in reality is a pointer to struct global_sym_lookup_data. */
1834 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
1837 struct global_sym_lookup_data
*data
=
1838 (struct global_sym_lookup_data
*) cb_data
;
1840 gdb_assert (data
->result
== NULL
);
1842 data
->result
= lookup_symbol_aux_objfile (objfile
, GLOBAL_BLOCK
,
1843 data
->name
, data
->domain
);
1844 if (data
->result
== NULL
)
1845 data
->result
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
,
1846 data
->name
, data
->domain
);
1848 /* If we found a match, tell the iterator to stop. Otherwise,
1850 return (data
->result
!= NULL
);
1856 lookup_symbol_global (const char *name
,
1857 const struct block
*block
,
1858 const domain_enum domain
)
1860 struct symbol
*sym
= NULL
;
1861 struct objfile
*objfile
= NULL
;
1862 struct global_sym_lookup_data lookup_data
;
1864 /* Call library-specific lookup procedure. */
1865 objfile
= lookup_objfile_from_block (block
);
1866 if (objfile
!= NULL
)
1867 sym
= solib_global_lookup (objfile
, name
, domain
);
1871 memset (&lookup_data
, 0, sizeof (lookup_data
));
1872 lookup_data
.name
= name
;
1873 lookup_data
.domain
= domain
;
1874 gdbarch_iterate_over_objfiles_in_search_order
1875 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
1876 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
1878 return lookup_data
.result
;
1882 symbol_matches_domain (enum language symbol_language
,
1883 domain_enum symbol_domain
,
1886 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1887 A Java class declaration also defines a typedef for the class.
1888 Similarly, any Ada type declaration implicitly defines a typedef. */
1889 if (symbol_language
== language_cplus
1890 || symbol_language
== language_d
1891 || symbol_language
== language_java
1892 || symbol_language
== language_ada
)
1894 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1895 && symbol_domain
== STRUCT_DOMAIN
)
1898 /* For all other languages, strict match is required. */
1899 return (symbol_domain
== domain
);
1905 lookup_transparent_type (const char *name
)
1907 return current_language
->la_lookup_transparent_type (name
);
1910 /* A helper for basic_lookup_transparent_type that interfaces with the
1911 "quick" symbol table functions. */
1913 static struct type
*
1914 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1917 struct symtab
*symtab
;
1918 const struct blockvector
*bv
;
1919 struct block
*block
;
1924 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1928 bv
= BLOCKVECTOR (symtab
);
1929 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1930 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1932 error_in_psymtab_expansion (kind
, name
, symtab
);
1934 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1935 return SYMBOL_TYPE (sym
);
1940 /* The standard implementation of lookup_transparent_type. This code
1941 was modeled on lookup_symbol -- the parts not relevant to looking
1942 up types were just left out. In particular it's assumed here that
1943 types are available in STRUCT_DOMAIN and only in file-static or
1947 basic_lookup_transparent_type (const char *name
)
1950 struct symtab
*s
= NULL
;
1951 const struct blockvector
*bv
;
1952 struct objfile
*objfile
;
1953 struct block
*block
;
1956 /* Now search all the global symbols. Do the symtab's first, then
1957 check the psymtab's. If a psymtab indicates the existence
1958 of the desired name as a global, then do psymtab-to-symtab
1959 conversion on the fly and return the found symbol. */
1961 ALL_OBJFILES (objfile
)
1963 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1965 bv
= BLOCKVECTOR (s
);
1966 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1967 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1968 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1970 return SYMBOL_TYPE (sym
);
1975 ALL_OBJFILES (objfile
)
1977 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1982 /* Now search the static file-level symbols.
1983 Not strictly correct, but more useful than an error.
1984 Do the symtab's first, then
1985 check the psymtab's. If a psymtab indicates the existence
1986 of the desired name as a file-level static, then do psymtab-to-symtab
1987 conversion on the fly and return the found symbol. */
1989 ALL_OBJFILES (objfile
)
1991 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1993 bv
= BLOCKVECTOR (s
);
1994 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1995 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1996 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1998 return SYMBOL_TYPE (sym
);
2003 ALL_OBJFILES (objfile
)
2005 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2010 return (struct type
*) 0;
2015 Note that if NAME is the demangled form of a C++ symbol, we will fail
2016 to find a match during the binary search of the non-encoded names, but
2017 for now we don't worry about the slight inefficiency of looking for
2018 a match we'll never find, since it will go pretty quick. Once the
2019 binary search terminates, we drop through and do a straight linear
2020 search on the symbols. Each symbol which is marked as being a ObjC/C++
2021 symbol (language_cplus or language_objc set) has both the encoded and
2022 non-encoded names tested for a match. */
2025 lookup_block_symbol (const struct block
*block
, const char *name
,
2026 const domain_enum domain
)
2028 struct block_iterator iter
;
2031 if (!BLOCK_FUNCTION (block
))
2033 for (sym
= block_iter_name_first (block
, name
, &iter
);
2035 sym
= block_iter_name_next (name
, &iter
))
2037 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2038 SYMBOL_DOMAIN (sym
), domain
))
2045 /* Note that parameter symbols do not always show up last in the
2046 list; this loop makes sure to take anything else other than
2047 parameter symbols first; it only uses parameter symbols as a
2048 last resort. Note that this only takes up extra computation
2051 struct symbol
*sym_found
= NULL
;
2053 for (sym
= block_iter_name_first (block
, name
, &iter
);
2055 sym
= block_iter_name_next (name
, &iter
))
2057 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2058 SYMBOL_DOMAIN (sym
), domain
))
2061 if (!SYMBOL_IS_ARGUMENT (sym
))
2067 return (sym_found
); /* Will be NULL if not found. */
2071 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2073 For each symbol that matches, CALLBACK is called. The symbol and
2074 DATA are passed to the callback.
2076 If CALLBACK returns zero, the iteration ends. Otherwise, the
2077 search continues. */
2080 iterate_over_symbols (const struct block
*block
, const char *name
,
2081 const domain_enum domain
,
2082 symbol_found_callback_ftype
*callback
,
2085 struct block_iterator iter
;
2088 for (sym
= block_iter_name_first (block
, name
, &iter
);
2090 sym
= block_iter_name_next (name
, &iter
))
2092 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2093 SYMBOL_DOMAIN (sym
), domain
))
2095 if (!callback (sym
, data
))
2101 /* Find the symtab associated with PC and SECTION. Look through the
2102 psymtabs and read in another symtab if necessary. */
2105 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2108 const struct blockvector
*bv
;
2109 struct symtab
*s
= NULL
;
2110 struct symtab
*best_s
= NULL
;
2111 struct objfile
*objfile
;
2112 CORE_ADDR distance
= 0;
2113 struct bound_minimal_symbol msymbol
;
2115 /* If we know that this is not a text address, return failure. This is
2116 necessary because we loop based on the block's high and low code
2117 addresses, which do not include the data ranges, and because
2118 we call find_pc_sect_psymtab which has a similar restriction based
2119 on the partial_symtab's texthigh and textlow. */
2120 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2122 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2123 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2124 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2125 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2126 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2129 /* Search all symtabs for the one whose file contains our address, and which
2130 is the smallest of all the ones containing the address. This is designed
2131 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2132 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2133 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2135 This happens for native ecoff format, where code from included files
2136 gets its own symtab. The symtab for the included file should have
2137 been read in already via the dependency mechanism.
2138 It might be swifter to create several symtabs with the same name
2139 like xcoff does (I'm not sure).
2141 It also happens for objfiles that have their functions reordered.
2142 For these, the symtab we are looking for is not necessarily read in. */
2144 ALL_PRIMARY_SYMTABS (objfile
, s
)
2146 bv
= BLOCKVECTOR (s
);
2147 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2149 if (BLOCK_START (b
) <= pc
2150 && BLOCK_END (b
) > pc
2152 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2154 /* For an objfile that has its functions reordered,
2155 find_pc_psymtab will find the proper partial symbol table
2156 and we simply return its corresponding symtab. */
2157 /* In order to better support objfiles that contain both
2158 stabs and coff debugging info, we continue on if a psymtab
2160 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2162 struct symtab
*result
;
2165 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2174 struct block_iterator iter
;
2175 struct symbol
*sym
= NULL
;
2177 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2179 fixup_symbol_section (sym
, objfile
);
2180 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2185 continue; /* No symbol in this symtab matches
2188 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2196 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2198 ALL_OBJFILES (objfile
)
2200 struct symtab
*result
;
2204 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2215 /* Find the symtab associated with PC. Look through the psymtabs and read
2216 in another symtab if necessary. Backward compatibility, no section. */
2219 find_pc_symtab (CORE_ADDR pc
)
2221 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2225 /* Find the source file and line number for a given PC value and SECTION.
2226 Return a structure containing a symtab pointer, a line number,
2227 and a pc range for the entire source line.
2228 The value's .pc field is NOT the specified pc.
2229 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2230 use the line that ends there. Otherwise, in that case, the line
2231 that begins there is used. */
2233 /* The big complication here is that a line may start in one file, and end just
2234 before the start of another file. This usually occurs when you #include
2235 code in the middle of a subroutine. To properly find the end of a line's PC
2236 range, we must search all symtabs associated with this compilation unit, and
2237 find the one whose first PC is closer than that of the next line in this
2240 /* If it's worth the effort, we could be using a binary search. */
2242 struct symtab_and_line
2243 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2246 struct linetable
*l
;
2249 struct linetable_entry
*item
;
2250 struct symtab_and_line val
;
2251 const struct blockvector
*bv
;
2252 struct bound_minimal_symbol msymbol
;
2253 struct objfile
*objfile
;
2255 /* Info on best line seen so far, and where it starts, and its file. */
2257 struct linetable_entry
*best
= NULL
;
2258 CORE_ADDR best_end
= 0;
2259 struct symtab
*best_symtab
= 0;
2261 /* Store here the first line number
2262 of a file which contains the line at the smallest pc after PC.
2263 If we don't find a line whose range contains PC,
2264 we will use a line one less than this,
2265 with a range from the start of that file to the first line's pc. */
2266 struct linetable_entry
*alt
= NULL
;
2268 /* Info on best line seen in this file. */
2270 struct linetable_entry
*prev
;
2272 /* If this pc is not from the current frame,
2273 it is the address of the end of a call instruction.
2274 Quite likely that is the start of the following statement.
2275 But what we want is the statement containing the instruction.
2276 Fudge the pc to make sure we get that. */
2278 init_sal (&val
); /* initialize to zeroes */
2280 val
.pspace
= current_program_space
;
2282 /* It's tempting to assume that, if we can't find debugging info for
2283 any function enclosing PC, that we shouldn't search for line
2284 number info, either. However, GAS can emit line number info for
2285 assembly files --- very helpful when debugging hand-written
2286 assembly code. In such a case, we'd have no debug info for the
2287 function, but we would have line info. */
2292 /* elz: added this because this function returned the wrong
2293 information if the pc belongs to a stub (import/export)
2294 to call a shlib function. This stub would be anywhere between
2295 two functions in the target, and the line info was erroneously
2296 taken to be the one of the line before the pc. */
2298 /* RT: Further explanation:
2300 * We have stubs (trampolines) inserted between procedures.
2302 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2303 * exists in the main image.
2305 * In the minimal symbol table, we have a bunch of symbols
2306 * sorted by start address. The stubs are marked as "trampoline",
2307 * the others appear as text. E.g.:
2309 * Minimal symbol table for main image
2310 * main: code for main (text symbol)
2311 * shr1: stub (trampoline symbol)
2312 * foo: code for foo (text symbol)
2314 * Minimal symbol table for "shr1" image:
2316 * shr1: code for shr1 (text symbol)
2319 * So the code below is trying to detect if we are in the stub
2320 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2321 * and if found, do the symbolization from the real-code address
2322 * rather than the stub address.
2324 * Assumptions being made about the minimal symbol table:
2325 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2326 * if we're really in the trampoline.s If we're beyond it (say
2327 * we're in "foo" in the above example), it'll have a closer
2328 * symbol (the "foo" text symbol for example) and will not
2329 * return the trampoline.
2330 * 2. lookup_minimal_symbol_text() will find a real text symbol
2331 * corresponding to the trampoline, and whose address will
2332 * be different than the trampoline address. I put in a sanity
2333 * check for the address being the same, to avoid an
2334 * infinite recursion.
2336 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2337 if (msymbol
.minsym
!= NULL
)
2338 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
2340 struct bound_minimal_symbol mfunsym
2341 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
2344 if (mfunsym
.minsym
== NULL
)
2345 /* I eliminated this warning since it is coming out
2346 * in the following situation:
2347 * gdb shmain // test program with shared libraries
2348 * (gdb) break shr1 // function in shared lib
2349 * Warning: In stub for ...
2350 * In the above situation, the shared lib is not loaded yet,
2351 * so of course we can't find the real func/line info,
2352 * but the "break" still works, and the warning is annoying.
2353 * So I commented out the warning. RT */
2354 /* warning ("In stub for %s; unable to find real function/line info",
2355 SYMBOL_LINKAGE_NAME (msymbol)); */
2358 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
2359 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
2360 /* Avoid infinite recursion */
2361 /* See above comment about why warning is commented out. */
2362 /* warning ("In stub for %s; unable to find real function/line info",
2363 SYMBOL_LINKAGE_NAME (msymbol)); */
2367 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2371 s
= find_pc_sect_symtab (pc
, section
);
2374 /* If no symbol information, return previous pc. */
2381 bv
= BLOCKVECTOR (s
);
2382 objfile
= s
->objfile
;
2384 /* Look at all the symtabs that share this blockvector.
2385 They all have the same apriori range, that we found was right;
2386 but they have different line tables. */
2388 ALL_OBJFILE_SYMTABS (objfile
, s
)
2390 if (BLOCKVECTOR (s
) != bv
)
2393 /* Find the best line in this symtab. */
2400 /* I think len can be zero if the symtab lacks line numbers
2401 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2402 I'm not sure which, and maybe it depends on the symbol
2408 item
= l
->item
; /* Get first line info. */
2410 /* Is this file's first line closer than the first lines of other files?
2411 If so, record this file, and its first line, as best alternate. */
2412 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2415 for (i
= 0; i
< len
; i
++, item
++)
2417 /* Leave prev pointing to the linetable entry for the last line
2418 that started at or before PC. */
2425 /* At this point, prev points at the line whose start addr is <= pc, and
2426 item points at the next line. If we ran off the end of the linetable
2427 (pc >= start of the last line), then prev == item. If pc < start of
2428 the first line, prev will not be set. */
2430 /* Is this file's best line closer than the best in the other files?
2431 If so, record this file, and its best line, as best so far. Don't
2432 save prev if it represents the end of a function (i.e. line number
2433 0) instead of a real line. */
2435 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2440 /* Discard BEST_END if it's before the PC of the current BEST. */
2441 if (best_end
<= best
->pc
)
2445 /* If another line (denoted by ITEM) is in the linetable and its
2446 PC is after BEST's PC, but before the current BEST_END, then
2447 use ITEM's PC as the new best_end. */
2448 if (best
&& i
< len
&& item
->pc
> best
->pc
2449 && (best_end
== 0 || best_end
> item
->pc
))
2450 best_end
= item
->pc
;
2455 /* If we didn't find any line number info, just return zeros.
2456 We used to return alt->line - 1 here, but that could be
2457 anywhere; if we don't have line number info for this PC,
2458 don't make some up. */
2461 else if (best
->line
== 0)
2463 /* If our best fit is in a range of PC's for which no line
2464 number info is available (line number is zero) then we didn't
2465 find any valid line information. */
2470 val
.symtab
= best_symtab
;
2471 val
.line
= best
->line
;
2473 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2478 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2480 val
.section
= section
;
2484 /* Backward compatibility (no section). */
2486 struct symtab_and_line
2487 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2489 struct obj_section
*section
;
2491 section
= find_pc_overlay (pc
);
2492 if (pc_in_unmapped_range (pc
, section
))
2493 pc
= overlay_mapped_address (pc
, section
);
2494 return find_pc_sect_line (pc
, section
, notcurrent
);
2497 /* Find line number LINE in any symtab whose name is the same as
2500 If found, return the symtab that contains the linetable in which it was
2501 found, set *INDEX to the index in the linetable of the best entry
2502 found, and set *EXACT_MATCH nonzero if the value returned is an
2505 If not found, return NULL. */
2508 find_line_symtab (struct symtab
*symtab
, int line
,
2509 int *index
, int *exact_match
)
2511 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2513 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2517 struct linetable
*best_linetable
;
2518 struct symtab
*best_symtab
;
2520 /* First try looking it up in the given symtab. */
2521 best_linetable
= LINETABLE (symtab
);
2522 best_symtab
= symtab
;
2523 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
2524 if (best_index
< 0 || !exact
)
2526 /* Didn't find an exact match. So we better keep looking for
2527 another symtab with the same name. In the case of xcoff,
2528 multiple csects for one source file (produced by IBM's FORTRAN
2529 compiler) produce multiple symtabs (this is unavoidable
2530 assuming csects can be at arbitrary places in memory and that
2531 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2533 /* BEST is the smallest linenumber > LINE so far seen,
2534 or 0 if none has been seen so far.
2535 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2538 struct objfile
*objfile
;
2541 if (best_index
>= 0)
2542 best
= best_linetable
->item
[best_index
].line
;
2546 ALL_OBJFILES (objfile
)
2549 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
2550 symtab_to_fullname (symtab
));
2553 ALL_SYMTABS (objfile
, s
)
2555 struct linetable
*l
;
2558 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2560 if (FILENAME_CMP (symtab_to_fullname (symtab
),
2561 symtab_to_fullname (s
)) != 0)
2564 ind
= find_line_common (l
, line
, &exact
, 0);
2574 if (best
== 0 || l
->item
[ind
].line
< best
)
2576 best
= l
->item
[ind
].line
;
2589 *index
= best_index
;
2591 *exact_match
= exact
;
2596 /* Given SYMTAB, returns all the PCs function in the symtab that
2597 exactly match LINE. Returns NULL if there are no exact matches,
2598 but updates BEST_ITEM in this case. */
2601 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
2602 struct linetable_entry
**best_item
)
2605 VEC (CORE_ADDR
) *result
= NULL
;
2607 /* First, collect all the PCs that are at this line. */
2613 idx
= find_line_common (LINETABLE (symtab
), line
, &was_exact
, start
);
2619 struct linetable_entry
*item
= &LINETABLE (symtab
)->item
[idx
];
2621 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
2627 VEC_safe_push (CORE_ADDR
, result
, LINETABLE (symtab
)->item
[idx
].pc
);
2635 /* Set the PC value for a given source file and line number and return true.
2636 Returns zero for invalid line number (and sets the PC to 0).
2637 The source file is specified with a struct symtab. */
2640 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2642 struct linetable
*l
;
2649 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2652 l
= LINETABLE (symtab
);
2653 *pc
= l
->item
[ind
].pc
;
2660 /* Find the range of pc values in a line.
2661 Store the starting pc of the line into *STARTPTR
2662 and the ending pc (start of next line) into *ENDPTR.
2663 Returns 1 to indicate success.
2664 Returns 0 if could not find the specified line. */
2667 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2670 CORE_ADDR startaddr
;
2671 struct symtab_and_line found_sal
;
2674 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2677 /* This whole function is based on address. For example, if line 10 has
2678 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2679 "info line *0x123" should say the line goes from 0x100 to 0x200
2680 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2681 This also insures that we never give a range like "starts at 0x134
2682 and ends at 0x12c". */
2684 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2685 if (found_sal
.line
!= sal
.line
)
2687 /* The specified line (sal) has zero bytes. */
2688 *startptr
= found_sal
.pc
;
2689 *endptr
= found_sal
.pc
;
2693 *startptr
= found_sal
.pc
;
2694 *endptr
= found_sal
.end
;
2699 /* Given a line table and a line number, return the index into the line
2700 table for the pc of the nearest line whose number is >= the specified one.
2701 Return -1 if none is found. The value is >= 0 if it is an index.
2702 START is the index at which to start searching the line table.
2704 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2707 find_line_common (struct linetable
*l
, int lineno
,
2708 int *exact_match
, int start
)
2713 /* BEST is the smallest linenumber > LINENO so far seen,
2714 or 0 if none has been seen so far.
2715 BEST_INDEX identifies the item for it. */
2717 int best_index
= -1;
2728 for (i
= start
; i
< len
; i
++)
2730 struct linetable_entry
*item
= &(l
->item
[i
]);
2732 if (item
->line
== lineno
)
2734 /* Return the first (lowest address) entry which matches. */
2739 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2746 /* If we got here, we didn't get an exact match. */
2751 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2753 struct symtab_and_line sal
;
2755 sal
= find_pc_line (pc
, 0);
2758 return sal
.symtab
!= 0;
2761 /* Given a function symbol SYM, find the symtab and line for the start
2763 If the argument FUNFIRSTLINE is nonzero, we want the first line
2764 of real code inside the function. */
2766 struct symtab_and_line
2767 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2769 struct symtab_and_line sal
;
2771 fixup_symbol_section (sym
, NULL
);
2772 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2773 SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
), 0);
2775 /* We always should have a line for the function start address.
2776 If we don't, something is odd. Create a plain SAL refering
2777 just the PC and hope that skip_prologue_sal (if requested)
2778 can find a line number for after the prologue. */
2779 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2782 sal
.pspace
= current_program_space
;
2783 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2784 sal
.section
= SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
);
2788 skip_prologue_sal (&sal
);
2793 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2794 address for that function that has an entry in SYMTAB's line info
2795 table. If such an entry cannot be found, return FUNC_ADDR
2799 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2801 CORE_ADDR func_start
, func_end
;
2802 struct linetable
*l
;
2805 /* Give up if this symbol has no lineinfo table. */
2806 l
= LINETABLE (symtab
);
2810 /* Get the range for the function's PC values, or give up if we
2811 cannot, for some reason. */
2812 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2815 /* Linetable entries are ordered by PC values, see the commentary in
2816 symtab.h where `struct linetable' is defined. Thus, the first
2817 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2818 address we are looking for. */
2819 for (i
= 0; i
< l
->nitems
; i
++)
2821 struct linetable_entry
*item
= &(l
->item
[i
]);
2823 /* Don't use line numbers of zero, they mark special entries in
2824 the table. See the commentary on symtab.h before the
2825 definition of struct linetable. */
2826 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2833 /* Adjust SAL to the first instruction past the function prologue.
2834 If the PC was explicitly specified, the SAL is not changed.
2835 If the line number was explicitly specified, at most the SAL's PC
2836 is updated. If SAL is already past the prologue, then do nothing. */
2839 skip_prologue_sal (struct symtab_and_line
*sal
)
2842 struct symtab_and_line start_sal
;
2843 struct cleanup
*old_chain
;
2844 CORE_ADDR pc
, saved_pc
;
2845 struct obj_section
*section
;
2847 struct objfile
*objfile
;
2848 struct gdbarch
*gdbarch
;
2849 const struct block
*b
, *function_block
;
2850 int force_skip
, skip
;
2852 /* Do not change the SAL if PC was specified explicitly. */
2853 if (sal
->explicit_pc
)
2856 old_chain
= save_current_space_and_thread ();
2857 switch_to_program_space_and_thread (sal
->pspace
);
2859 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2862 fixup_symbol_section (sym
, NULL
);
2864 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2865 section
= SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
);
2866 name
= SYMBOL_LINKAGE_NAME (sym
);
2867 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2871 struct bound_minimal_symbol msymbol
2872 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2874 if (msymbol
.minsym
== NULL
)
2876 do_cleanups (old_chain
);
2880 objfile
= msymbol
.objfile
;
2881 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
2882 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
2883 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
2886 gdbarch
= get_objfile_arch (objfile
);
2888 /* Process the prologue in two passes. In the first pass try to skip the
2889 prologue (SKIP is true) and verify there is a real need for it (indicated
2890 by FORCE_SKIP). If no such reason was found run a second pass where the
2891 prologue is not skipped (SKIP is false). */
2896 /* Be conservative - allow direct PC (without skipping prologue) only if we
2897 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2898 have to be set by the caller so we use SYM instead. */
2899 if (sym
&& SYMBOL_SYMTAB (sym
)->locations_valid
)
2907 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2908 so that gdbarch_skip_prologue has something unique to work on. */
2909 if (section_is_overlay (section
) && !section_is_mapped (section
))
2910 pc
= overlay_unmapped_address (pc
, section
);
2912 /* Skip "first line" of function (which is actually its prologue). */
2913 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2914 if (gdbarch_skip_entrypoint_p (gdbarch
))
2915 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
2917 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2919 /* For overlays, map pc back into its mapped VMA range. */
2920 pc
= overlay_mapped_address (pc
, section
);
2922 /* Calculate line number. */
2923 start_sal
= find_pc_sect_line (pc
, section
, 0);
2925 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2926 line is still part of the same function. */
2927 if (skip
&& start_sal
.pc
!= pc
2928 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2929 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2930 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
2931 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
2933 /* First pc of next line */
2935 /* Recalculate the line number (might not be N+1). */
2936 start_sal
= find_pc_sect_line (pc
, section
, 0);
2939 /* On targets with executable formats that don't have a concept of
2940 constructors (ELF with .init has, PE doesn't), gcc emits a call
2941 to `__main' in `main' between the prologue and before user
2943 if (gdbarch_skip_main_prologue_p (gdbarch
)
2944 && name
&& strcmp_iw (name
, "main") == 0)
2946 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2947 /* Recalculate the line number (might not be N+1). */
2948 start_sal
= find_pc_sect_line (pc
, section
, 0);
2952 while (!force_skip
&& skip
--);
2954 /* If we still don't have a valid source line, try to find the first
2955 PC in the lineinfo table that belongs to the same function. This
2956 happens with COFF debug info, which does not seem to have an
2957 entry in lineinfo table for the code after the prologue which has
2958 no direct relation to source. For example, this was found to be
2959 the case with the DJGPP target using "gcc -gcoff" when the
2960 compiler inserted code after the prologue to make sure the stack
2962 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
2964 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2965 /* Recalculate the line number. */
2966 start_sal
= find_pc_sect_line (pc
, section
, 0);
2969 do_cleanups (old_chain
);
2971 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2972 forward SAL to the end of the prologue. */
2977 sal
->section
= section
;
2979 /* Unless the explicit_line flag was set, update the SAL line
2980 and symtab to correspond to the modified PC location. */
2981 if (sal
->explicit_line
)
2984 sal
->symtab
= start_sal
.symtab
;
2985 sal
->line
= start_sal
.line
;
2986 sal
->end
= start_sal
.end
;
2988 /* Check if we are now inside an inlined function. If we can,
2989 use the call site of the function instead. */
2990 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2991 function_block
= NULL
;
2994 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2996 else if (BLOCK_FUNCTION (b
) != NULL
)
2998 b
= BLOCK_SUPERBLOCK (b
);
3000 if (function_block
!= NULL
3001 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3003 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3004 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
3008 /* Determine if PC is in the prologue of a function. The prologue is the area
3009 between the first instruction of a function, and the first executable line.
3010 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
3012 If non-zero, func_start is where we think the prologue starts, possibly
3013 by previous examination of symbol table information. */
3016 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
3018 struct symtab_and_line sal
;
3019 CORE_ADDR func_addr
, func_end
;
3021 /* We have several sources of information we can consult to figure
3023 - Compilers usually emit line number info that marks the prologue
3024 as its own "source line". So the ending address of that "line"
3025 is the end of the prologue. If available, this is the most
3027 - The minimal symbols and partial symbols, which can usually tell
3028 us the starting and ending addresses of a function.
3029 - If we know the function's start address, we can call the
3030 architecture-defined gdbarch_skip_prologue function to analyze the
3031 instruction stream and guess where the prologue ends.
3032 - Our `func_start' argument; if non-zero, this is the caller's
3033 best guess as to the function's entry point. At the time of
3034 this writing, handle_inferior_event doesn't get this right, so
3035 it should be our last resort. */
3037 /* Consult the partial symbol table, to find which function
3039 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
3041 CORE_ADDR prologue_end
;
3043 /* We don't even have minsym information, so fall back to using
3044 func_start, if given. */
3046 return 1; /* We *might* be in a prologue. */
3048 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
3050 return func_start
<= pc
&& pc
< prologue_end
;
3053 /* If we have line number information for the function, that's
3054 usually pretty reliable. */
3055 sal
= find_pc_line (func_addr
, 0);
3057 /* Now sal describes the source line at the function's entry point,
3058 which (by convention) is the prologue. The end of that "line",
3059 sal.end, is the end of the prologue.
3061 Note that, for functions whose source code is all on a single
3062 line, the line number information doesn't always end up this way.
3063 So we must verify that our purported end-of-prologue address is
3064 *within* the function, not at its start or end. */
3066 || sal
.end
<= func_addr
3067 || func_end
<= sal
.end
)
3069 /* We don't have any good line number info, so use the minsym
3070 information, together with the architecture-specific prologue
3072 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
3074 return func_addr
<= pc
&& pc
< prologue_end
;
3077 /* We have line number info, and it looks good. */
3078 return func_addr
<= pc
&& pc
< sal
.end
;
3081 /* Given PC at the function's start address, attempt to find the
3082 prologue end using SAL information. Return zero if the skip fails.
3084 A non-optimized prologue traditionally has one SAL for the function
3085 and a second for the function body. A single line function has
3086 them both pointing at the same line.
3088 An optimized prologue is similar but the prologue may contain
3089 instructions (SALs) from the instruction body. Need to skip those
3090 while not getting into the function body.
3092 The functions end point and an increasing SAL line are used as
3093 indicators of the prologue's endpoint.
3095 This code is based on the function refine_prologue_limit
3099 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3101 struct symtab_and_line prologue_sal
;
3104 const struct block
*bl
;
3106 /* Get an initial range for the function. */
3107 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3108 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3110 prologue_sal
= find_pc_line (start_pc
, 0);
3111 if (prologue_sal
.line
!= 0)
3113 /* For languages other than assembly, treat two consecutive line
3114 entries at the same address as a zero-instruction prologue.
3115 The GNU assembler emits separate line notes for each instruction
3116 in a multi-instruction macro, but compilers generally will not
3118 if (prologue_sal
.symtab
->language
!= language_asm
)
3120 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
3123 /* Skip any earlier lines, and any end-of-sequence marker
3124 from a previous function. */
3125 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3126 || linetable
->item
[idx
].line
== 0)
3129 if (idx
+1 < linetable
->nitems
3130 && linetable
->item
[idx
+1].line
!= 0
3131 && linetable
->item
[idx
+1].pc
== start_pc
)
3135 /* If there is only one sal that covers the entire function,
3136 then it is probably a single line function, like
3138 if (prologue_sal
.end
>= end_pc
)
3141 while (prologue_sal
.end
< end_pc
)
3143 struct symtab_and_line sal
;
3145 sal
= find_pc_line (prologue_sal
.end
, 0);
3148 /* Assume that a consecutive SAL for the same (or larger)
3149 line mark the prologue -> body transition. */
3150 if (sal
.line
>= prologue_sal
.line
)
3152 /* Likewise if we are in a different symtab altogether
3153 (e.g. within a file included via #include). */
3154 if (sal
.symtab
!= prologue_sal
.symtab
)
3157 /* The line number is smaller. Check that it's from the
3158 same function, not something inlined. If it's inlined,
3159 then there is no point comparing the line numbers. */
3160 bl
= block_for_pc (prologue_sal
.end
);
3163 if (block_inlined_p (bl
))
3165 if (BLOCK_FUNCTION (bl
))
3170 bl
= BLOCK_SUPERBLOCK (bl
);
3175 /* The case in which compiler's optimizer/scheduler has
3176 moved instructions into the prologue. We look ahead in
3177 the function looking for address ranges whose
3178 corresponding line number is less the first one that we
3179 found for the function. This is more conservative then
3180 refine_prologue_limit which scans a large number of SALs
3181 looking for any in the prologue. */
3186 if (prologue_sal
.end
< end_pc
)
3187 /* Return the end of this line, or zero if we could not find a
3189 return prologue_sal
.end
;
3191 /* Don't return END_PC, which is past the end of the function. */
3192 return prologue_sal
.pc
;
3195 /* If P is of the form "operator[ \t]+..." where `...' is
3196 some legitimate operator text, return a pointer to the
3197 beginning of the substring of the operator text.
3198 Otherwise, return "". */
3201 operator_chars (const char *p
, const char **end
)
3204 if (strncmp (p
, "operator", 8))
3208 /* Don't get faked out by `operator' being part of a longer
3210 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3213 /* Allow some whitespace between `operator' and the operator symbol. */
3214 while (*p
== ' ' || *p
== '\t')
3217 /* Recognize 'operator TYPENAME'. */
3219 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3221 const char *q
= p
+ 1;
3223 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3232 case '\\': /* regexp quoting */
3235 if (p
[2] == '=') /* 'operator\*=' */
3237 else /* 'operator\*' */
3241 else if (p
[1] == '[')
3244 error (_("mismatched quoting on brackets, "
3245 "try 'operator\\[\\]'"));
3246 else if (p
[2] == '\\' && p
[3] == ']')
3248 *end
= p
+ 4; /* 'operator\[\]' */
3252 error (_("nothing is allowed between '[' and ']'"));
3256 /* Gratuitous qoute: skip it and move on. */
3278 if (p
[0] == '-' && p
[1] == '>')
3280 /* Struct pointer member operator 'operator->'. */
3283 *end
= p
+ 3; /* 'operator->*' */
3286 else if (p
[2] == '\\')
3288 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3293 *end
= p
+ 2; /* 'operator->' */
3297 if (p
[1] == '=' || p
[1] == p
[0])
3308 error (_("`operator ()' must be specified "
3309 "without whitespace in `()'"));
3314 error (_("`operator ?:' must be specified "
3315 "without whitespace in `?:'"));
3320 error (_("`operator []' must be specified "
3321 "without whitespace in `[]'"));
3325 error (_("`operator %s' not supported"), p
);
3334 /* Cache to watch for file names already seen by filename_seen. */
3336 struct filename_seen_cache
3338 /* Table of files seen so far. */
3340 /* Initial size of the table. It automagically grows from here. */
3341 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3344 /* filename_seen_cache constructor. */
3346 static struct filename_seen_cache
*
3347 create_filename_seen_cache (void)
3349 struct filename_seen_cache
*cache
;
3351 cache
= XNEW (struct filename_seen_cache
);
3352 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3353 filename_hash
, filename_eq
,
3354 NULL
, xcalloc
, xfree
);
3359 /* Empty the cache, but do not delete it. */
3362 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
3364 htab_empty (cache
->tab
);
3367 /* filename_seen_cache destructor.
3368 This takes a void * argument as it is generally used as a cleanup. */
3371 delete_filename_seen_cache (void *ptr
)
3373 struct filename_seen_cache
*cache
= ptr
;
3375 htab_delete (cache
->tab
);
3379 /* If FILE is not already in the table of files in CACHE, return zero;
3380 otherwise return non-zero. Optionally add FILE to the table if ADD
3383 NOTE: We don't manage space for FILE, we assume FILE lives as long
3384 as the caller needs. */
3387 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
3391 /* Is FILE in tab? */
3392 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
3396 /* No; maybe add it to tab. */
3398 *slot
= (char *) file
;
3403 /* Data structure to maintain printing state for output_source_filename. */
3405 struct output_source_filename_data
3407 /* Cache of what we've seen so far. */
3408 struct filename_seen_cache
*filename_seen_cache
;
3410 /* Flag of whether we're printing the first one. */
3414 /* Slave routine for sources_info. Force line breaks at ,'s.
3415 NAME is the name to print.
3416 DATA contains the state for printing and watching for duplicates. */
3419 output_source_filename (const char *name
,
3420 struct output_source_filename_data
*data
)
3422 /* Since a single source file can result in several partial symbol
3423 tables, we need to avoid printing it more than once. Note: if
3424 some of the psymtabs are read in and some are not, it gets
3425 printed both under "Source files for which symbols have been
3426 read" and "Source files for which symbols will be read in on
3427 demand". I consider this a reasonable way to deal with the
3428 situation. I'm not sure whether this can also happen for
3429 symtabs; it doesn't hurt to check. */
3431 /* Was NAME already seen? */
3432 if (filename_seen (data
->filename_seen_cache
, name
, 1))
3434 /* Yes; don't print it again. */
3438 /* No; print it and reset *FIRST. */
3440 printf_filtered (", ");
3444 fputs_filtered (name
, gdb_stdout
);
3447 /* A callback for map_partial_symbol_filenames. */
3450 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3453 output_source_filename (fullname
? fullname
: filename
, data
);
3457 sources_info (char *ignore
, int from_tty
)
3460 struct objfile
*objfile
;
3461 struct output_source_filename_data data
;
3462 struct cleanup
*cleanups
;
3464 if (!have_full_symbols () && !have_partial_symbols ())
3466 error (_("No symbol table is loaded. Use the \"file\" command."));
3469 data
.filename_seen_cache
= create_filename_seen_cache ();
3470 cleanups
= make_cleanup (delete_filename_seen_cache
,
3471 data
.filename_seen_cache
);
3473 printf_filtered ("Source files for which symbols have been read in:\n\n");
3476 ALL_SYMTABS (objfile
, s
)
3478 const char *fullname
= symtab_to_fullname (s
);
3480 output_source_filename (fullname
, &data
);
3482 printf_filtered ("\n\n");
3484 printf_filtered ("Source files for which symbols "
3485 "will be read in on demand:\n\n");
3487 clear_filename_seen_cache (data
.filename_seen_cache
);
3489 map_symbol_filenames (output_partial_symbol_filename
, &data
,
3490 1 /*need_fullname*/);
3491 printf_filtered ("\n");
3493 do_cleanups (cleanups
);
3496 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
3497 non-zero compare only lbasename of FILES. */
3500 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
3504 if (file
!= NULL
&& nfiles
!= 0)
3506 for (i
= 0; i
< nfiles
; i
++)
3508 if (compare_filenames_for_search (file
, (basenames
3509 ? lbasename (files
[i
])
3514 else if (nfiles
== 0)
3519 /* Free any memory associated with a search. */
3522 free_search_symbols (struct symbol_search
*symbols
)
3524 struct symbol_search
*p
;
3525 struct symbol_search
*next
;
3527 for (p
= symbols
; p
!= NULL
; p
= next
)
3535 do_free_search_symbols_cleanup (void *symbolsp
)
3537 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
3539 free_search_symbols (symbols
);
3543 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
3545 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
3548 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
3549 sort symbols, not minimal symbols. */
3552 compare_search_syms (const void *sa
, const void *sb
)
3554 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
3555 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
3558 c
= FILENAME_CMP (sym_a
->symtab
->filename
, sym_b
->symtab
->filename
);
3562 if (sym_a
->block
!= sym_b
->block
)
3563 return sym_a
->block
- sym_b
->block
;
3565 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
3566 SYMBOL_PRINT_NAME (sym_b
->symbol
));
3569 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
3570 The duplicates are freed, and the new list is returned in
3571 *NEW_HEAD, *NEW_TAIL. */
3574 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
3575 struct symbol_search
**new_head
,
3576 struct symbol_search
**new_tail
)
3578 struct symbol_search
**symbols
, *symp
, *old_next
;
3581 gdb_assert (found
!= NULL
&& nfound
> 0);
3583 /* Build an array out of the list so we can easily sort them. */
3584 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3587 for (i
= 0; i
< nfound
; i
++)
3589 gdb_assert (symp
!= NULL
);
3590 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
3594 gdb_assert (symp
== NULL
);
3596 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3597 compare_search_syms
);
3599 /* Collapse out the dups. */
3600 for (i
= 1, j
= 1; i
< nfound
; ++i
)
3602 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
3603 symbols
[j
++] = symbols
[i
];
3608 symbols
[j
- 1]->next
= NULL
;
3610 /* Rebuild the linked list. */
3611 for (i
= 0; i
< nunique
- 1; i
++)
3612 symbols
[i
]->next
= symbols
[i
+ 1];
3613 symbols
[nunique
- 1]->next
= NULL
;
3615 *new_head
= symbols
[0];
3616 *new_tail
= symbols
[nunique
- 1];
3620 /* An object of this type is passed as the user_data to the
3621 expand_symtabs_matching method. */
3622 struct search_symbols_data
3627 /* It is true if PREG contains valid data, false otherwise. */
3628 unsigned preg_p
: 1;
3632 /* A callback for expand_symtabs_matching. */
3635 search_symbols_file_matches (const char *filename
, void *user_data
,
3638 struct search_symbols_data
*data
= user_data
;
3640 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
3643 /* A callback for expand_symtabs_matching. */
3646 search_symbols_name_matches (const char *symname
, void *user_data
)
3648 struct search_symbols_data
*data
= user_data
;
3650 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3653 /* Search the symbol table for matches to the regular expression REGEXP,
3654 returning the results in *MATCHES.
3656 Only symbols of KIND are searched:
3657 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3658 and constants (enums)
3659 FUNCTIONS_DOMAIN - search all functions
3660 TYPES_DOMAIN - search all type names
3661 ALL_DOMAIN - an internal error for this function
3663 free_search_symbols should be called when *MATCHES is no longer needed.
3665 Within each file the results are sorted locally; each symtab's global and
3666 static blocks are separately alphabetized.
3667 Duplicate entries are removed. */
3670 search_symbols (const char *regexp
, enum search_domain kind
,
3671 int nfiles
, const char *files
[],
3672 struct symbol_search
**matches
)
3675 const struct blockvector
*bv
;
3678 struct block_iterator iter
;
3680 struct objfile
*objfile
;
3681 struct minimal_symbol
*msymbol
;
3683 static const enum minimal_symbol_type types
[]
3684 = {mst_data
, mst_text
, mst_abs
};
3685 static const enum minimal_symbol_type types2
[]
3686 = {mst_bss
, mst_file_text
, mst_abs
};
3687 static const enum minimal_symbol_type types3
[]
3688 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3689 static const enum minimal_symbol_type types4
[]
3690 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3691 enum minimal_symbol_type ourtype
;
3692 enum minimal_symbol_type ourtype2
;
3693 enum minimal_symbol_type ourtype3
;
3694 enum minimal_symbol_type ourtype4
;
3695 struct symbol_search
*found
;
3696 struct symbol_search
*tail
;
3697 struct search_symbols_data datum
;
3700 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3701 CLEANUP_CHAIN is freed only in the case of an error. */
3702 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3703 struct cleanup
*retval_chain
;
3705 gdb_assert (kind
<= TYPES_DOMAIN
);
3707 ourtype
= types
[kind
];
3708 ourtype2
= types2
[kind
];
3709 ourtype3
= types3
[kind
];
3710 ourtype4
= types4
[kind
];
3717 /* Make sure spacing is right for C++ operators.
3718 This is just a courtesy to make the matching less sensitive
3719 to how many spaces the user leaves between 'operator'
3720 and <TYPENAME> or <OPERATOR>. */
3722 const char *opname
= operator_chars (regexp
, &opend
);
3727 int fix
= -1; /* -1 means ok; otherwise number of
3730 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3732 /* There should 1 space between 'operator' and 'TYPENAME'. */
3733 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3738 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3739 if (opname
[-1] == ' ')
3742 /* If wrong number of spaces, fix it. */
3745 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3747 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3752 errcode
= regcomp (&datum
.preg
, regexp
,
3753 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3757 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3759 make_cleanup (xfree
, err
);
3760 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3763 make_regfree_cleanup (&datum
.preg
);
3766 /* Search through the partial symtabs *first* for all symbols
3767 matching the regexp. That way we don't have to reproduce all of
3768 the machinery below. */
3770 datum
.nfiles
= nfiles
;
3771 datum
.files
= files
;
3772 expand_symtabs_matching ((nfiles
== 0
3774 : search_symbols_file_matches
),
3775 search_symbols_name_matches
,
3778 /* Here, we search through the minimal symbol tables for functions
3779 and variables that match, and force their symbols to be read.
3780 This is in particular necessary for demangled variable names,
3781 which are no longer put into the partial symbol tables.
3782 The symbol will then be found during the scan of symtabs below.
3784 For functions, find_pc_symtab should succeed if we have debug info
3785 for the function, for variables we have to call
3786 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3788 If the lookup fails, set found_misc so that we will rescan to print
3789 any matching symbols without debug info.
3790 We only search the objfile the msymbol came from, we no longer search
3791 all objfiles. In large programs (1000s of shared libs) searching all
3792 objfiles is not worth the pain. */
3794 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3796 ALL_MSYMBOLS (objfile
, msymbol
)
3800 if (msymbol
->created_by_gdb
)
3803 if (MSYMBOL_TYPE (msymbol
) == ourtype
3804 || MSYMBOL_TYPE (msymbol
) == ourtype2
3805 || MSYMBOL_TYPE (msymbol
) == ourtype3
3806 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3809 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
3812 /* Note: An important side-effect of these lookup functions
3813 is to expand the symbol table if msymbol is found, for the
3814 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3815 if (kind
== FUNCTIONS_DOMAIN
3816 ? find_pc_symtab (MSYMBOL_VALUE_ADDRESS (objfile
,
3818 : (lookup_symbol_in_objfile_from_linkage_name
3819 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3830 retval_chain
= make_cleanup_free_search_symbols (&found
);
3832 ALL_PRIMARY_SYMTABS (objfile
, s
)
3834 bv
= BLOCKVECTOR (s
);
3835 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3837 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3838 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3840 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3844 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
3845 a substring of symtab_to_fullname as it may contain "./" etc. */
3846 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
3847 || ((basenames_may_differ
3848 || file_matches (lbasename (real_symtab
->filename
),
3850 && file_matches (symtab_to_fullname (real_symtab
),
3853 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3855 && ((kind
== VARIABLES_DOMAIN
3856 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3857 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3858 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3859 /* LOC_CONST can be used for more than just enums,
3860 e.g., c++ static const members.
3861 We only want to skip enums here. */
3862 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3863 && TYPE_CODE (SYMBOL_TYPE (sym
))
3865 || (kind
== FUNCTIONS_DOMAIN
3866 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3867 || (kind
== TYPES_DOMAIN
3868 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3871 struct symbol_search
*psr
= (struct symbol_search
*)
3872 xmalloc (sizeof (struct symbol_search
));
3874 psr
->symtab
= real_symtab
;
3876 memset (&psr
->msymbol
, 0, sizeof (psr
->msymbol
));
3891 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
3892 /* Note: nfound is no longer useful beyond this point. */
3895 /* If there are no eyes, avoid all contact. I mean, if there are
3896 no debug symbols, then print directly from the msymbol_vector. */
3898 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
3900 ALL_MSYMBOLS (objfile
, msymbol
)
3904 if (msymbol
->created_by_gdb
)
3907 if (MSYMBOL_TYPE (msymbol
) == ourtype
3908 || MSYMBOL_TYPE (msymbol
) == ourtype2
3909 || MSYMBOL_TYPE (msymbol
) == ourtype3
3910 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3913 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
3916 /* For functions we can do a quick check of whether the
3917 symbol might be found via find_pc_symtab. */
3918 if (kind
!= FUNCTIONS_DOMAIN
3919 || find_pc_symtab (MSYMBOL_VALUE_ADDRESS (objfile
,
3922 if (lookup_symbol_in_objfile_from_linkage_name
3923 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3927 struct symbol_search
*psr
= (struct symbol_search
*)
3928 xmalloc (sizeof (struct symbol_search
));
3930 psr
->msymbol
.minsym
= msymbol
;
3931 psr
->msymbol
.objfile
= objfile
;
3947 discard_cleanups (retval_chain
);
3948 do_cleanups (old_chain
);
3952 /* Helper function for symtab_symbol_info, this function uses
3953 the data returned from search_symbols() to print information
3954 regarding the match to gdb_stdout. */
3957 print_symbol_info (enum search_domain kind
,
3958 struct symtab
*s
, struct symbol
*sym
,
3959 int block
, const char *last
)
3961 const char *s_filename
= symtab_to_filename_for_display (s
);
3963 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
3965 fputs_filtered ("\nFile ", gdb_stdout
);
3966 fputs_filtered (s_filename
, gdb_stdout
);
3967 fputs_filtered (":\n", gdb_stdout
);
3970 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3971 printf_filtered ("static ");
3973 /* Typedef that is not a C++ class. */
3974 if (kind
== TYPES_DOMAIN
3975 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3976 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3977 /* variable, func, or typedef-that-is-c++-class. */
3978 else if (kind
< TYPES_DOMAIN
3979 || (kind
== TYPES_DOMAIN
3980 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3982 type_print (SYMBOL_TYPE (sym
),
3983 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3984 ? "" : SYMBOL_PRINT_NAME (sym
)),
3987 printf_filtered (";\n");
3991 /* This help function for symtab_symbol_info() prints information
3992 for non-debugging symbols to gdb_stdout. */
3995 print_msymbol_info (struct bound_minimal_symbol msymbol
)
3997 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4000 if (gdbarch_addr_bit (gdbarch
) <= 32)
4001 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4002 & (CORE_ADDR
) 0xffffffff,
4005 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4007 printf_filtered ("%s %s\n",
4008 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4011 /* This is the guts of the commands "info functions", "info types", and
4012 "info variables". It calls search_symbols to find all matches and then
4013 print_[m]symbol_info to print out some useful information about the
4017 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4019 static const char * const classnames
[] =
4020 {"variable", "function", "type"};
4021 struct symbol_search
*symbols
;
4022 struct symbol_search
*p
;
4023 struct cleanup
*old_chain
;
4024 const char *last_filename
= NULL
;
4027 gdb_assert (kind
<= TYPES_DOMAIN
);
4029 /* Must make sure that if we're interrupted, symbols gets freed. */
4030 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4031 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4034 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4035 classnames
[kind
], regexp
);
4037 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4039 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4043 if (p
->msymbol
.minsym
!= NULL
)
4047 printf_filtered (_("\nNon-debugging symbols:\n"));
4050 print_msymbol_info (p
->msymbol
);
4054 print_symbol_info (kind
,
4059 last_filename
= symtab_to_filename_for_display (p
->symtab
);
4063 do_cleanups (old_chain
);
4067 variables_info (char *regexp
, int from_tty
)
4069 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4073 functions_info (char *regexp
, int from_tty
)
4075 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4080 types_info (char *regexp
, int from_tty
)
4082 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4085 /* Breakpoint all functions matching regular expression. */
4088 rbreak_command_wrapper (char *regexp
, int from_tty
)
4090 rbreak_command (regexp
, from_tty
);
4093 /* A cleanup function that calls end_rbreak_breakpoints. */
4096 do_end_rbreak_breakpoints (void *ignore
)
4098 end_rbreak_breakpoints ();
4102 rbreak_command (char *regexp
, int from_tty
)
4104 struct symbol_search
*ss
;
4105 struct symbol_search
*p
;
4106 struct cleanup
*old_chain
;
4107 char *string
= NULL
;
4109 const char **files
= NULL
;
4110 const char *file_name
;
4115 char *colon
= strchr (regexp
, ':');
4117 if (colon
&& *(colon
+ 1) != ':')
4122 colon_index
= colon
- regexp
;
4123 local_name
= alloca (colon_index
+ 1);
4124 memcpy (local_name
, regexp
, colon_index
);
4125 local_name
[colon_index
--] = 0;
4126 while (isspace (local_name
[colon_index
]))
4127 local_name
[colon_index
--] = 0;
4128 file_name
= local_name
;
4131 regexp
= skip_spaces (colon
+ 1);
4135 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4136 old_chain
= make_cleanup_free_search_symbols (&ss
);
4137 make_cleanup (free_current_contents
, &string
);
4139 start_rbreak_breakpoints ();
4140 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4141 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4143 if (p
->msymbol
.minsym
== NULL
)
4145 const char *fullname
= symtab_to_fullname (p
->symtab
);
4147 int newlen
= (strlen (fullname
)
4148 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4153 string
= xrealloc (string
, newlen
);
4156 strcpy (string
, fullname
);
4157 strcat (string
, ":'");
4158 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
4159 strcat (string
, "'");
4160 break_command (string
, from_tty
);
4161 print_symbol_info (FUNCTIONS_DOMAIN
,
4165 symtab_to_filename_for_display (p
->symtab
));
4169 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4173 string
= xrealloc (string
, newlen
);
4176 strcpy (string
, "'");
4177 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4178 strcat (string
, "'");
4180 break_command (string
, from_tty
);
4181 printf_filtered ("<function, no debug info> %s;\n",
4182 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4186 do_cleanups (old_chain
);
4190 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4192 Either sym_text[sym_text_len] != '(' and then we search for any
4193 symbol starting with SYM_TEXT text.
4195 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4196 be terminated at that point. Partial symbol tables do not have parameters
4200 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4202 int (*ncmp
) (const char *, const char *, size_t);
4204 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4206 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4209 if (sym_text
[sym_text_len
] == '(')
4211 /* User searches for `name(someth...'. Require NAME to be terminated.
4212 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4213 present but accept even parameters presence. In this case this
4214 function is in fact strcmp_iw but whitespace skipping is not supported
4215 for tab completion. */
4217 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4224 /* Free any memory associated with a completion list. */
4227 free_completion_list (VEC (char_ptr
) **list_ptr
)
4232 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4234 VEC_free (char_ptr
, *list_ptr
);
4237 /* Callback for make_cleanup. */
4240 do_free_completion_list (void *list
)
4242 free_completion_list (list
);
4245 /* Helper routine for make_symbol_completion_list. */
4247 static VEC (char_ptr
) *return_val
;
4249 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4250 completion_list_add_name \
4251 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4253 #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4254 completion_list_add_name \
4255 (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4257 /* Test to see if the symbol specified by SYMNAME (which is already
4258 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4259 characters. If so, add it to the current completion list. */
4262 completion_list_add_name (const char *symname
,
4263 const char *sym_text
, int sym_text_len
,
4264 const char *text
, const char *word
)
4266 /* Clip symbols that cannot match. */
4267 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4270 /* We have a match for a completion, so add SYMNAME to the current list
4271 of matches. Note that the name is moved to freshly malloc'd space. */
4276 if (word
== sym_text
)
4278 new = xmalloc (strlen (symname
) + 5);
4279 strcpy (new, symname
);
4281 else if (word
> sym_text
)
4283 /* Return some portion of symname. */
4284 new = xmalloc (strlen (symname
) + 5);
4285 strcpy (new, symname
+ (word
- sym_text
));
4289 /* Return some of SYM_TEXT plus symname. */
4290 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4291 strncpy (new, word
, sym_text
- word
);
4292 new[sym_text
- word
] = '\0';
4293 strcat (new, symname
);
4296 VEC_safe_push (char_ptr
, return_val
, new);
4300 /* ObjC: In case we are completing on a selector, look as the msymbol
4301 again and feed all the selectors into the mill. */
4304 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4305 const char *sym_text
, int sym_text_len
,
4306 const char *text
, const char *word
)
4308 static char *tmp
= NULL
;
4309 static unsigned int tmplen
= 0;
4311 const char *method
, *category
, *selector
;
4314 method
= MSYMBOL_NATURAL_NAME (msymbol
);
4316 /* Is it a method? */
4317 if ((method
[0] != '-') && (method
[0] != '+'))
4320 if (sym_text
[0] == '[')
4321 /* Complete on shortened method method. */
4322 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4324 while ((strlen (method
) + 1) >= tmplen
)
4330 tmp
= xrealloc (tmp
, tmplen
);
4332 selector
= strchr (method
, ' ');
4333 if (selector
!= NULL
)
4336 category
= strchr (method
, '(');
4338 if ((category
!= NULL
) && (selector
!= NULL
))
4340 memcpy (tmp
, method
, (category
- method
));
4341 tmp
[category
- method
] = ' ';
4342 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4343 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4344 if (sym_text
[0] == '[')
4345 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4348 if (selector
!= NULL
)
4350 /* Complete on selector only. */
4351 strcpy (tmp
, selector
);
4352 tmp2
= strchr (tmp
, ']');
4356 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4360 /* Break the non-quoted text based on the characters which are in
4361 symbols. FIXME: This should probably be language-specific. */
4364 language_search_unquoted_string (const char *text
, const char *p
)
4366 for (; p
> text
; --p
)
4368 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
4372 if ((current_language
->la_language
== language_objc
))
4374 if (p
[-1] == ':') /* Might be part of a method name. */
4376 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
4377 p
-= 2; /* Beginning of a method name. */
4378 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
4379 { /* Might be part of a method name. */
4382 /* Seeing a ' ' or a '(' is not conclusive evidence
4383 that we are in the middle of a method name. However,
4384 finding "-[" or "+[" should be pretty un-ambiguous.
4385 Unfortunately we have to find it now to decide. */
4388 if (isalnum (t
[-1]) || t
[-1] == '_' ||
4389 t
[-1] == ' ' || t
[-1] == ':' ||
4390 t
[-1] == '(' || t
[-1] == ')')
4395 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
4396 p
= t
- 2; /* Method name detected. */
4397 /* Else we leave with p unchanged. */
4407 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
4408 int sym_text_len
, const char *text
,
4411 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
4413 struct type
*t
= SYMBOL_TYPE (sym
);
4414 enum type_code c
= TYPE_CODE (t
);
4417 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
4418 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
4419 if (TYPE_FIELD_NAME (t
, j
))
4420 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
4421 sym_text
, sym_text_len
, text
, word
);
4425 /* Type of the user_data argument passed to add_macro_name or
4426 symbol_completion_matcher. The contents are simply whatever is
4427 needed by completion_list_add_name. */
4428 struct add_name_data
4430 const char *sym_text
;
4436 /* A callback used with macro_for_each and macro_for_each_in_scope.
4437 This adds a macro's name to the current completion list. */
4440 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4441 struct macro_source_file
*ignore2
, int ignore3
,
4444 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4446 completion_list_add_name (name
,
4447 datum
->sym_text
, datum
->sym_text_len
,
4448 datum
->text
, datum
->word
);
4451 /* A callback for expand_symtabs_matching. */
4454 symbol_completion_matcher (const char *name
, void *user_data
)
4456 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4458 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4462 default_make_symbol_completion_list_break_on (const char *text
,
4464 const char *break_on
,
4465 enum type_code code
)
4467 /* Problem: All of the symbols have to be copied because readline
4468 frees them. I'm not going to worry about this; hopefully there
4469 won't be that many. */
4473 struct minimal_symbol
*msymbol
;
4474 struct objfile
*objfile
;
4475 const struct block
*b
;
4476 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4477 struct block_iterator iter
;
4478 /* The symbol we are completing on. Points in same buffer as text. */
4479 const char *sym_text
;
4480 /* Length of sym_text. */
4482 struct add_name_data datum
;
4483 struct cleanup
*back_to
;
4485 /* Now look for the symbol we are supposed to complete on. */
4489 const char *quote_pos
= NULL
;
4491 /* First see if this is a quoted string. */
4493 for (p
= text
; *p
!= '\0'; ++p
)
4495 if (quote_found
!= '\0')
4497 if (*p
== quote_found
)
4498 /* Found close quote. */
4500 else if (*p
== '\\' && p
[1] == quote_found
)
4501 /* A backslash followed by the quote character
4502 doesn't end the string. */
4505 else if (*p
== '\'' || *p
== '"')
4511 if (quote_found
== '\'')
4512 /* A string within single quotes can be a symbol, so complete on it. */
4513 sym_text
= quote_pos
+ 1;
4514 else if (quote_found
== '"')
4515 /* A double-quoted string is never a symbol, nor does it make sense
4516 to complete it any other way. */
4522 /* It is not a quoted string. Break it based on the characters
4523 which are in symbols. */
4526 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4527 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4536 sym_text_len
= strlen (sym_text
);
4538 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4540 if (current_language
->la_language
== language_cplus
4541 || current_language
->la_language
== language_java
4542 || current_language
->la_language
== language_fortran
)
4544 /* These languages may have parameters entered by user but they are never
4545 present in the partial symbol tables. */
4547 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4550 sym_text_len
= cs
- sym_text
;
4552 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4555 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4557 datum
.sym_text
= sym_text
;
4558 datum
.sym_text_len
= sym_text_len
;
4562 /* Look through the partial symtabs for all symbols which begin
4563 by matching SYM_TEXT. Expand all CUs that you find to the list.
4564 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4565 expand_symtabs_matching (NULL
, symbol_completion_matcher
, ALL_DOMAIN
,
4568 /* At this point scan through the misc symbol vectors and add each
4569 symbol you find to the list. Eventually we want to ignore
4570 anything that isn't a text symbol (everything else will be
4571 handled by the psymtab code above). */
4573 if (code
== TYPE_CODE_UNDEF
)
4575 ALL_MSYMBOLS (objfile
, msymbol
)
4578 MCOMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
4581 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
4586 /* Search upwards from currently selected frame (so that we can
4587 complete on local vars). Also catch fields of types defined in
4588 this places which match our text string. Only complete on types
4589 visible from current context. */
4591 b
= get_selected_block (0);
4592 surrounding_static_block
= block_static_block (b
);
4593 surrounding_global_block
= block_global_block (b
);
4594 if (surrounding_static_block
!= NULL
)
4595 while (b
!= surrounding_static_block
)
4599 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4601 if (code
== TYPE_CODE_UNDEF
)
4603 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4605 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4608 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4609 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
4610 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4614 /* Stop when we encounter an enclosing function. Do not stop for
4615 non-inlined functions - the locals of the enclosing function
4616 are in scope for a nested function. */
4617 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4619 b
= BLOCK_SUPERBLOCK (b
);
4622 /* Add fields from the file's types; symbols will be added below. */
4624 if (code
== TYPE_CODE_UNDEF
)
4626 if (surrounding_static_block
!= NULL
)
4627 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4628 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4630 if (surrounding_global_block
!= NULL
)
4631 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4632 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4635 /* Go through the symtabs and check the externs and statics for
4636 symbols which match. */
4638 ALL_PRIMARY_SYMTABS (objfile
, s
)
4641 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4642 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4644 if (code
== TYPE_CODE_UNDEF
4645 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4646 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4647 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4651 ALL_PRIMARY_SYMTABS (objfile
, s
)
4654 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4655 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4657 if (code
== TYPE_CODE_UNDEF
4658 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
4659 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
4660 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4664 /* Skip macros if we are completing a struct tag -- arguable but
4665 usually what is expected. */
4666 if (current_language
->la_macro_expansion
== macro_expansion_c
4667 && code
== TYPE_CODE_UNDEF
)
4669 struct macro_scope
*scope
;
4671 /* Add any macros visible in the default scope. Note that this
4672 may yield the occasional wrong result, because an expression
4673 might be evaluated in a scope other than the default. For
4674 example, if the user types "break file:line if <TAB>", the
4675 resulting expression will be evaluated at "file:line" -- but
4676 at there does not seem to be a way to detect this at
4678 scope
= default_macro_scope ();
4681 macro_for_each_in_scope (scope
->file
, scope
->line
,
4682 add_macro_name
, &datum
);
4686 /* User-defined macros are always visible. */
4687 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4690 discard_cleanups (back_to
);
4691 return (return_val
);
4695 default_make_symbol_completion_list (const char *text
, const char *word
,
4696 enum type_code code
)
4698 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
4701 /* Return a vector of all symbols (regardless of class) which begin by
4702 matching TEXT. If the answer is no symbols, then the return value
4706 make_symbol_completion_list (const char *text
, const char *word
)
4708 return current_language
->la_make_symbol_completion_list (text
, word
,
4712 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4713 symbols whose type code is CODE. */
4716 make_symbol_completion_type (const char *text
, const char *word
,
4717 enum type_code code
)
4719 gdb_assert (code
== TYPE_CODE_UNION
4720 || code
== TYPE_CODE_STRUCT
4721 || code
== TYPE_CODE_CLASS
4722 || code
== TYPE_CODE_ENUM
);
4723 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
4726 /* Like make_symbol_completion_list, but suitable for use as a
4727 completion function. */
4730 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4731 const char *text
, const char *word
)
4733 return make_symbol_completion_list (text
, word
);
4736 /* Like make_symbol_completion_list, but returns a list of symbols
4737 defined in a source file FILE. */
4740 make_file_symbol_completion_list (const char *text
, const char *word
,
4741 const char *srcfile
)
4746 struct block_iterator iter
;
4747 /* The symbol we are completing on. Points in same buffer as text. */
4748 const char *sym_text
;
4749 /* Length of sym_text. */
4752 /* Now look for the symbol we are supposed to complete on.
4753 FIXME: This should be language-specific. */
4757 const char *quote_pos
= NULL
;
4759 /* First see if this is a quoted string. */
4761 for (p
= text
; *p
!= '\0'; ++p
)
4763 if (quote_found
!= '\0')
4765 if (*p
== quote_found
)
4766 /* Found close quote. */
4768 else if (*p
== '\\' && p
[1] == quote_found
)
4769 /* A backslash followed by the quote character
4770 doesn't end the string. */
4773 else if (*p
== '\'' || *p
== '"')
4779 if (quote_found
== '\'')
4780 /* A string within single quotes can be a symbol, so complete on it. */
4781 sym_text
= quote_pos
+ 1;
4782 else if (quote_found
== '"')
4783 /* A double-quoted string is never a symbol, nor does it make sense
4784 to complete it any other way. */
4790 /* Not a quoted string. */
4791 sym_text
= language_search_unquoted_string (text
, p
);
4795 sym_text_len
= strlen (sym_text
);
4799 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4801 s
= lookup_symtab (srcfile
);
4804 /* Maybe they typed the file with leading directories, while the
4805 symbol tables record only its basename. */
4806 const char *tail
= lbasename (srcfile
);
4809 s
= lookup_symtab (tail
);
4812 /* If we have no symtab for that file, return an empty list. */
4814 return (return_val
);
4816 /* Go through this symtab and check the externs and statics for
4817 symbols which match. */
4819 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4820 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4822 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4825 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4826 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4828 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4831 return (return_val
);
4834 /* A helper function for make_source_files_completion_list. It adds
4835 another file name to a list of possible completions, growing the
4836 list as necessary. */
4839 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
4840 VEC (char_ptr
) **list
)
4843 size_t fnlen
= strlen (fname
);
4847 /* Return exactly fname. */
4848 new = xmalloc (fnlen
+ 5);
4849 strcpy (new, fname
);
4851 else if (word
> text
)
4853 /* Return some portion of fname. */
4854 new = xmalloc (fnlen
+ 5);
4855 strcpy (new, fname
+ (word
- text
));
4859 /* Return some of TEXT plus fname. */
4860 new = xmalloc (fnlen
+ (text
- word
) + 5);
4861 strncpy (new, word
, text
- word
);
4862 new[text
- word
] = '\0';
4863 strcat (new, fname
);
4865 VEC_safe_push (char_ptr
, *list
, new);
4869 not_interesting_fname (const char *fname
)
4871 static const char *illegal_aliens
[] = {
4872 "_globals_", /* inserted by coff_symtab_read */
4877 for (i
= 0; illegal_aliens
[i
]; i
++)
4879 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4885 /* An object of this type is passed as the user_data argument to
4886 map_partial_symbol_filenames. */
4887 struct add_partial_filename_data
4889 struct filename_seen_cache
*filename_seen_cache
;
4893 VEC (char_ptr
) **list
;
4896 /* A callback for map_partial_symbol_filenames. */
4899 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4902 struct add_partial_filename_data
*data
= user_data
;
4904 if (not_interesting_fname (filename
))
4906 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
4907 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4909 /* This file matches for a completion; add it to the
4910 current list of matches. */
4911 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
4915 const char *base_name
= lbasename (filename
);
4917 if (base_name
!= filename
4918 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
4919 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4920 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
4924 /* Return a vector of all source files whose names begin with matching
4925 TEXT. The file names are looked up in the symbol tables of this
4926 program. If the answer is no matchess, then the return value is
4930 make_source_files_completion_list (const char *text
, const char *word
)
4933 struct objfile
*objfile
;
4934 size_t text_len
= strlen (text
);
4935 VEC (char_ptr
) *list
= NULL
;
4936 const char *base_name
;
4937 struct add_partial_filename_data datum
;
4938 struct filename_seen_cache
*filename_seen_cache
;
4939 struct cleanup
*back_to
, *cache_cleanup
;
4941 if (!have_full_symbols () && !have_partial_symbols ())
4944 back_to
= make_cleanup (do_free_completion_list
, &list
);
4946 filename_seen_cache
= create_filename_seen_cache ();
4947 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
4948 filename_seen_cache
);
4950 ALL_SYMTABS (objfile
, s
)
4952 if (not_interesting_fname (s
->filename
))
4954 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
4955 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4957 /* This file matches for a completion; add it to the current
4959 add_filename_to_list (s
->filename
, text
, word
, &list
);
4963 /* NOTE: We allow the user to type a base name when the
4964 debug info records leading directories, but not the other
4965 way around. This is what subroutines of breakpoint
4966 command do when they parse file names. */
4967 base_name
= lbasename (s
->filename
);
4968 if (base_name
!= s
->filename
4969 && !filename_seen (filename_seen_cache
, base_name
, 1)
4970 && filename_ncmp (base_name
, text
, text_len
) == 0)
4971 add_filename_to_list (base_name
, text
, word
, &list
);
4975 datum
.filename_seen_cache
= filename_seen_cache
;
4978 datum
.text_len
= text_len
;
4980 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4981 0 /*need_fullname*/);
4983 do_cleanups (cache_cleanup
);
4984 discard_cleanups (back_to
);
4991 /* Return the "main_info" object for the current program space. If
4992 the object has not yet been created, create it and fill in some
4995 static struct main_info
*
4996 get_main_info (void)
4998 struct main_info
*info
= program_space_data (current_program_space
,
4999 main_progspace_key
);
5003 /* It may seem strange to store the main name in the progspace
5004 and also in whatever objfile happens to see a main name in
5005 its debug info. The reason for this is mainly historical:
5006 gdb returned "main" as the name even if no function named
5007 "main" was defined the program; and this approach lets us
5008 keep compatibility. */
5009 info
= XCNEW (struct main_info
);
5010 info
->language_of_main
= language_unknown
;
5011 set_program_space_data (current_program_space
, main_progspace_key
,
5018 /* A cleanup to destroy a struct main_info when a progspace is
5022 main_info_cleanup (struct program_space
*pspace
, void *data
)
5024 struct main_info
*info
= data
;
5027 xfree (info
->name_of_main
);
5032 set_main_name (const char *name
, enum language lang
)
5034 struct main_info
*info
= get_main_info ();
5036 if (info
->name_of_main
!= NULL
)
5038 xfree (info
->name_of_main
);
5039 info
->name_of_main
= NULL
;
5040 info
->language_of_main
= language_unknown
;
5044 info
->name_of_main
= xstrdup (name
);
5045 info
->language_of_main
= lang
;
5049 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5053 find_main_name (void)
5055 const char *new_main_name
;
5056 struct objfile
*objfile
;
5058 /* First check the objfiles to see whether a debuginfo reader has
5059 picked up the appropriate main name. Historically the main name
5060 was found in a more or less random way; this approach instead
5061 relies on the order of objfile creation -- which still isn't
5062 guaranteed to get the correct answer, but is just probably more
5064 ALL_OBJFILES (objfile
)
5066 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5068 set_main_name (objfile
->per_bfd
->name_of_main
,
5069 objfile
->per_bfd
->language_of_main
);
5074 /* Try to see if the main procedure is in Ada. */
5075 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5076 be to add a new method in the language vector, and call this
5077 method for each language until one of them returns a non-empty
5078 name. This would allow us to remove this hard-coded call to
5079 an Ada function. It is not clear that this is a better approach
5080 at this point, because all methods need to be written in a way
5081 such that false positives never be returned. For instance, it is
5082 important that a method does not return a wrong name for the main
5083 procedure if the main procedure is actually written in a different
5084 language. It is easy to guaranty this with Ada, since we use a
5085 special symbol generated only when the main in Ada to find the name
5086 of the main procedure. It is difficult however to see how this can
5087 be guarantied for languages such as C, for instance. This suggests
5088 that order of call for these methods becomes important, which means
5089 a more complicated approach. */
5090 new_main_name
= ada_main_name ();
5091 if (new_main_name
!= NULL
)
5093 set_main_name (new_main_name
, language_ada
);
5097 new_main_name
= d_main_name ();
5098 if (new_main_name
!= NULL
)
5100 set_main_name (new_main_name
, language_d
);
5104 new_main_name
= go_main_name ();
5105 if (new_main_name
!= NULL
)
5107 set_main_name (new_main_name
, language_go
);
5111 new_main_name
= pascal_main_name ();
5112 if (new_main_name
!= NULL
)
5114 set_main_name (new_main_name
, language_pascal
);
5118 /* The languages above didn't identify the name of the main procedure.
5119 Fallback to "main". */
5120 set_main_name ("main", language_unknown
);
5126 struct main_info
*info
= get_main_info ();
5128 if (info
->name_of_main
== NULL
)
5131 return info
->name_of_main
;
5134 /* Return the language of the main function. If it is not known,
5135 return language_unknown. */
5138 main_language (void)
5140 struct main_info
*info
= get_main_info ();
5142 if (info
->name_of_main
== NULL
)
5145 return info
->language_of_main
;
5148 /* Handle ``executable_changed'' events for the symtab module. */
5151 symtab_observer_executable_changed (void)
5153 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5154 set_main_name (NULL
, language_unknown
);
5157 /* Return 1 if the supplied producer string matches the ARM RealView
5158 compiler (armcc). */
5161 producer_is_realview (const char *producer
)
5163 static const char *const arm_idents
[] = {
5164 "ARM C Compiler, ADS",
5165 "Thumb C Compiler, ADS",
5166 "ARM C++ Compiler, ADS",
5167 "Thumb C++ Compiler, ADS",
5168 "ARM/Thumb C/C++ Compiler, RVCT",
5169 "ARM C/C++ Compiler, RVCT"
5173 if (producer
== NULL
)
5176 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5177 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
5185 /* The next index to hand out in response to a registration request. */
5187 static int next_aclass_value
= LOC_FINAL_VALUE
;
5189 /* The maximum number of "aclass" registrations we support. This is
5190 constant for convenience. */
5191 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5193 /* The objects representing the various "aclass" values. The elements
5194 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5195 elements are those registered at gdb initialization time. */
5197 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
5199 /* The globally visible pointer. This is separate from 'symbol_impl'
5200 so that it can be const. */
5202 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
5204 /* Make sure we saved enough room in struct symbol. */
5206 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
5208 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5209 is the ops vector associated with this index. This returns the new
5210 index, which should be used as the aclass_index field for symbols
5214 register_symbol_computed_impl (enum address_class aclass
,
5215 const struct symbol_computed_ops
*ops
)
5217 int result
= next_aclass_value
++;
5219 gdb_assert (aclass
== LOC_COMPUTED
);
5220 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5221 symbol_impl
[result
].aclass
= aclass
;
5222 symbol_impl
[result
].ops_computed
= ops
;
5224 /* Sanity check OPS. */
5225 gdb_assert (ops
!= NULL
);
5226 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
5227 gdb_assert (ops
->describe_location
!= NULL
);
5228 gdb_assert (ops
->read_needs_frame
!= NULL
);
5229 gdb_assert (ops
->read_variable
!= NULL
);
5234 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5235 OPS is the ops vector associated with this index. This returns the
5236 new index, which should be used as the aclass_index field for symbols
5240 register_symbol_block_impl (enum address_class aclass
,
5241 const struct symbol_block_ops
*ops
)
5243 int result
= next_aclass_value
++;
5245 gdb_assert (aclass
== LOC_BLOCK
);
5246 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5247 symbol_impl
[result
].aclass
= aclass
;
5248 symbol_impl
[result
].ops_block
= ops
;
5250 /* Sanity check OPS. */
5251 gdb_assert (ops
!= NULL
);
5252 gdb_assert (ops
->find_frame_base_location
!= NULL
);
5257 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5258 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5259 this index. This returns the new index, which should be used as
5260 the aclass_index field for symbols of this type. */
5263 register_symbol_register_impl (enum address_class aclass
,
5264 const struct symbol_register_ops
*ops
)
5266 int result
= next_aclass_value
++;
5268 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
5269 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5270 symbol_impl
[result
].aclass
= aclass
;
5271 symbol_impl
[result
].ops_register
= ops
;
5276 /* Initialize elements of 'symbol_impl' for the constants in enum
5280 initialize_ordinary_address_classes (void)
5284 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
5285 symbol_impl
[i
].aclass
= i
;
5290 /* Initialize the symbol SYM. */
5293 initialize_symbol (struct symbol
*sym
)
5295 memset (sym
, 0, sizeof (*sym
));
5296 SYMBOL_SECTION (sym
) = -1;
5299 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
5303 allocate_symbol (struct objfile
*objfile
)
5305 struct symbol
*result
;
5307 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
5308 SYMBOL_SECTION (result
) = -1;
5313 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
5316 struct template_symbol
*
5317 allocate_template_symbol (struct objfile
*objfile
)
5319 struct template_symbol
*result
;
5321 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
5322 SYMBOL_SECTION (&result
->base
) = -1;
5330 _initialize_symtab (void)
5332 initialize_ordinary_address_classes ();
5335 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
5337 add_info ("variables", variables_info
, _("\
5338 All global and static variable names, or those matching REGEXP."));
5340 add_com ("whereis", class_info
, variables_info
, _("\
5341 All global and static variable names, or those matching REGEXP."));
5343 add_info ("functions", functions_info
,
5344 _("All function names, or those matching REGEXP."));
5346 /* FIXME: This command has at least the following problems:
5347 1. It prints builtin types (in a very strange and confusing fashion).
5348 2. It doesn't print right, e.g. with
5349 typedef struct foo *FOO
5350 type_print prints "FOO" when we want to make it (in this situation)
5351 print "struct foo *".
5352 I also think "ptype" or "whatis" is more likely to be useful (but if
5353 there is much disagreement "info types" can be fixed). */
5354 add_info ("types", types_info
,
5355 _("All type names, or those matching REGEXP."));
5357 add_info ("sources", sources_info
,
5358 _("Source files in the program."));
5360 add_com ("rbreak", class_breakpoint
, rbreak_command
,
5361 _("Set a breakpoint for all functions matching REGEXP."));
5365 add_com ("lf", class_info
, sources_info
,
5366 _("Source files in the program"));
5367 add_com ("lg", class_info
, variables_info
, _("\
5368 All global and static variable names, or those matching REGEXP."));
5371 add_setshow_enum_cmd ("multiple-symbols", no_class
,
5372 multiple_symbols_modes
, &multiple_symbols_mode
,
5374 Set the debugger behavior when more than one symbol are possible matches\n\
5375 in an expression."), _("\
5376 Show how the debugger handles ambiguities in expressions."), _("\
5377 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5378 NULL
, NULL
, &setlist
, &showlist
);
5380 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
5381 &basenames_may_differ
, _("\
5382 Set whether a source file may have multiple base names."), _("\
5383 Show whether a source file may have multiple base names."), _("\
5384 (A \"base name\" is the name of a file with the directory part removed.\n\
5385 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5386 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5387 before comparing them. Canonicalization is an expensive operation,\n\
5388 but it allows the same file be known by more than one base name.\n\
5389 If not set (the default), all source files are assumed to have just\n\
5390 one base name, and gdb will do file name comparisons more efficiently."),
5392 &setlist
, &showlist
);
5394 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
5395 _("Set debugging of symbol table creation."),
5396 _("Show debugging of symbol table creation."), _("\
5397 When enabled (non-zero), debugging messages are printed when building\n\
5398 symbol tables. A value of 1 (one) normally provides enough information.\n\
5399 A value greater than 1 provides more verbose information."),
5402 &setdebuglist
, &showdebuglist
);
5404 observer_attach_executable_changed (symtab_observer_executable_changed
);