1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2016 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"
63 #include "completer.h"
65 /* Forward declarations for local functions. */
67 static void rbreak_command (char *, int);
69 static int find_line_common (struct linetable
*, int, int *, int);
71 static struct block_symbol
72 lookup_symbol_aux (const char *name
,
73 const struct block
*block
,
74 const domain_enum domain
,
75 enum language language
,
76 struct field_of_this_result
*);
79 struct block_symbol
lookup_local_symbol (const char *name
,
80 const struct block
*block
,
81 const domain_enum domain
,
82 enum language language
);
84 static struct block_symbol
85 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
86 const char *name
, const domain_enum domain
);
89 const struct block_symbol null_block_symbol
= { NULL
, NULL
};
91 extern initialize_file_ftype _initialize_symtab
;
93 /* Program space key for finding name and language of "main". */
95 static const struct program_space_data
*main_progspace_key
;
97 /* Type of the data stored on the program space. */
101 /* Name of "main". */
105 /* Language of "main". */
107 enum language language_of_main
;
110 /* Program space key for finding its symbol cache. */
112 static const struct program_space_data
*symbol_cache_key
;
114 /* The default symbol cache size.
115 There is no extra cpu cost for large N (except when flushing the cache,
116 which is rare). The value here is just a first attempt. A better default
117 value may be higher or lower. A prime number can make up for a bad hash
118 computation, so that's why the number is what it is. */
119 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
121 /* The maximum symbol cache size.
122 There's no method to the decision of what value to use here, other than
123 there's no point in allowing a user typo to make gdb consume all memory. */
124 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
126 /* symbol_cache_lookup returns this if a previous lookup failed to find the
127 symbol in any objfile. */
128 #define SYMBOL_LOOKUP_FAILED \
129 ((struct block_symbol) {(struct symbol *) 1, NULL})
130 #define SYMBOL_LOOKUP_FAILED_P(SIB) (SIB.symbol == (struct symbol *) 1)
132 /* Recording lookups that don't find the symbol is just as important, if not
133 more so, than recording found symbols. */
135 enum symbol_cache_slot_state
138 SYMBOL_SLOT_NOT_FOUND
,
142 struct symbol_cache_slot
144 enum symbol_cache_slot_state state
;
146 /* The objfile that was current when the symbol was looked up.
147 This is only needed for global blocks, but for simplicity's sake
148 we allocate the space for both. If data shows the extra space used
149 for static blocks is a problem, we can split things up then.
151 Global blocks need cache lookup to include the objfile context because
152 we need to account for gdbarch_iterate_over_objfiles_in_search_order
153 which can traverse objfiles in, effectively, any order, depending on
154 the current objfile, thus affecting which symbol is found. Normally,
155 only the current objfile is searched first, and then the rest are
156 searched in recorded order; but putting cache lookup inside
157 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
158 Instead we just make the current objfile part of the context of
159 cache lookup. This means we can record the same symbol multiple times,
160 each with a different "current objfile" that was in effect when the
161 lookup was saved in the cache, but cache space is pretty cheap. */
162 const struct objfile
*objfile_context
;
166 struct block_symbol found
;
175 /* Symbols don't specify global vs static block.
176 So keep them in separate caches. */
178 struct block_symbol_cache
182 unsigned int collisions
;
184 /* SYMBOLS is a variable length array of this size.
185 One can imagine that in general one cache (global/static) should be a
186 fraction of the size of the other, but there's no data at the moment
187 on which to decide. */
190 struct symbol_cache_slot symbols
[1];
195 Searching for symbols in the static and global blocks over multiple objfiles
196 again and again can be slow, as can searching very big objfiles. This is a
197 simple cache to improve symbol lookup performance, which is critical to
198 overall gdb performance.
200 Symbols are hashed on the name, its domain, and block.
201 They are also hashed on their objfile for objfile-specific lookups. */
205 struct block_symbol_cache
*global_symbols
;
206 struct block_symbol_cache
*static_symbols
;
209 /* When non-zero, print debugging messages related to symtab creation. */
210 unsigned int symtab_create_debug
= 0;
212 /* When non-zero, print debugging messages related to symbol lookup. */
213 unsigned int symbol_lookup_debug
= 0;
215 /* The size of the cache is staged here. */
216 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
218 /* The current value of the symbol cache size.
219 This is saved so that if the user enters a value too big we can restore
220 the original value from here. */
221 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
223 /* Non-zero if a file may be known by two different basenames.
224 This is the uncommon case, and significantly slows down gdb.
225 Default set to "off" to not slow down the common case. */
226 int basenames_may_differ
= 0;
228 /* Allow the user to configure the debugger behavior with respect
229 to multiple-choice menus when more than one symbol matches during
232 const char multiple_symbols_ask
[] = "ask";
233 const char multiple_symbols_all
[] = "all";
234 const char multiple_symbols_cancel
[] = "cancel";
235 static const char *const multiple_symbols_modes
[] =
237 multiple_symbols_ask
,
238 multiple_symbols_all
,
239 multiple_symbols_cancel
,
242 static const char *multiple_symbols_mode
= multiple_symbols_all
;
244 /* Read-only accessor to AUTO_SELECT_MODE. */
247 multiple_symbols_select_mode (void)
249 return multiple_symbols_mode
;
252 /* Return the name of a domain_enum. */
255 domain_name (domain_enum e
)
259 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
260 case VAR_DOMAIN
: return "VAR_DOMAIN";
261 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
262 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
263 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
264 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
265 default: gdb_assert_not_reached ("bad domain_enum");
269 /* Return the name of a search_domain . */
272 search_domain_name (enum search_domain e
)
276 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
277 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
278 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
279 case ALL_DOMAIN
: return "ALL_DOMAIN";
280 default: gdb_assert_not_reached ("bad search_domain");
287 compunit_primary_filetab (const struct compunit_symtab
*cust
)
289 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
291 /* The primary file symtab is the first one in the list. */
292 return COMPUNIT_FILETABS (cust
);
298 compunit_language (const struct compunit_symtab
*cust
)
300 struct symtab
*symtab
= compunit_primary_filetab (cust
);
302 /* The language of the compunit symtab is the language of its primary
304 return SYMTAB_LANGUAGE (symtab
);
307 /* See whether FILENAME matches SEARCH_NAME using the rule that we
308 advertise to the user. (The manual's description of linespecs
309 describes what we advertise). Returns true if they match, false
313 compare_filenames_for_search (const char *filename
, const char *search_name
)
315 int len
= strlen (filename
);
316 size_t search_len
= strlen (search_name
);
318 if (len
< search_len
)
321 /* The tail of FILENAME must match. */
322 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
325 /* Either the names must completely match, or the character
326 preceding the trailing SEARCH_NAME segment of FILENAME must be a
329 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
330 cannot match FILENAME "/path//dir/file.c" - as user has requested
331 absolute path. The sama applies for "c:\file.c" possibly
332 incorrectly hypothetically matching "d:\dir\c:\file.c".
334 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
335 compatible with SEARCH_NAME "file.c". In such case a compiler had
336 to put the "c:file.c" name into debug info. Such compatibility
337 works only on GDB built for DOS host. */
338 return (len
== search_len
339 || (!IS_ABSOLUTE_PATH (search_name
)
340 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
341 || (HAS_DRIVE_SPEC (filename
)
342 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
345 /* Same as compare_filenames_for_search, but for glob-style patterns.
346 Heads up on the order of the arguments. They match the order of
347 compare_filenames_for_search, but it's the opposite of the order of
348 arguments to gdb_filename_fnmatch. */
351 compare_glob_filenames_for_search (const char *filename
,
352 const char *search_name
)
354 /* We rely on the property of glob-style patterns with FNM_FILE_NAME that
355 all /s have to be explicitly specified. */
356 int file_path_elements
= count_path_elements (filename
);
357 int search_path_elements
= count_path_elements (search_name
);
359 if (search_path_elements
> file_path_elements
)
362 if (IS_ABSOLUTE_PATH (search_name
))
364 return (search_path_elements
== file_path_elements
365 && gdb_filename_fnmatch (search_name
, filename
,
366 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0);
370 const char *file_to_compare
371 = strip_leading_path_elements (filename
,
372 file_path_elements
- search_path_elements
);
374 return gdb_filename_fnmatch (search_name
, file_to_compare
,
375 FNM_FILE_NAME
| FNM_NOESCAPE
) == 0;
379 /* Check for a symtab of a specific name by searching some symtabs.
380 This is a helper function for callbacks of iterate_over_symtabs.
382 If NAME is not absolute, then REAL_PATH is NULL
383 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
385 The return value, NAME, REAL_PATH, CALLBACK, and DATA
386 are identical to the `map_symtabs_matching_filename' method of
387 quick_symbol_functions.
389 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
390 Each symtab within the specified compunit symtab is also searched.
391 AFTER_LAST is one past the last compunit symtab to search; NULL means to
392 search until the end of the list. */
395 iterate_over_some_symtabs (const char *name
,
396 const char *real_path
,
397 int (*callback
) (struct symtab
*symtab
,
400 struct compunit_symtab
*first
,
401 struct compunit_symtab
*after_last
)
403 struct compunit_symtab
*cust
;
405 const char* base_name
= lbasename (name
);
407 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
409 ALL_COMPUNIT_FILETABS (cust
, s
)
411 if (compare_filenames_for_search (s
->filename
, name
))
413 if (callback (s
, data
))
418 /* Before we invoke realpath, which can get expensive when many
419 files are involved, do a quick comparison of the basenames. */
420 if (! basenames_may_differ
421 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
424 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
426 if (callback (s
, data
))
431 /* If the user gave us an absolute path, try to find the file in
432 this symtab and use its absolute path. */
433 if (real_path
!= NULL
)
435 const char *fullname
= symtab_to_fullname (s
);
437 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
438 gdb_assert (IS_ABSOLUTE_PATH (name
));
439 if (FILENAME_CMP (real_path
, fullname
) == 0)
441 if (callback (s
, data
))
452 /* Check for a symtab of a specific name; first in symtabs, then in
453 psymtabs. *If* there is no '/' in the name, a match after a '/'
454 in the symtab filename will also work.
456 Calls CALLBACK with each symtab that is found and with the supplied
457 DATA. If CALLBACK returns true, the search stops. */
460 iterate_over_symtabs (const char *name
,
461 int (*callback
) (struct symtab
*symtab
,
465 struct objfile
*objfile
;
466 char *real_path
= NULL
;
467 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
469 /* Here we are interested in canonicalizing an absolute path, not
470 absolutizing a relative path. */
471 if (IS_ABSOLUTE_PATH (name
))
473 real_path
= gdb_realpath (name
);
474 make_cleanup (xfree
, real_path
);
475 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
478 ALL_OBJFILES (objfile
)
480 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
481 objfile
->compunit_symtabs
, NULL
))
483 do_cleanups (cleanups
);
488 /* Same search rules as above apply here, but now we look thru the
491 ALL_OBJFILES (objfile
)
494 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
500 do_cleanups (cleanups
);
505 do_cleanups (cleanups
);
508 /* The callback function used by lookup_symtab. */
511 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
513 struct symtab
**result_ptr
= (struct symtab
**) data
;
515 *result_ptr
= symtab
;
519 /* A wrapper for iterate_over_symtabs that returns the first matching
523 lookup_symtab (const char *name
)
525 struct symtab
*result
= NULL
;
527 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
532 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
533 full method name, which consist of the class name (from T), the unadorned
534 method name from METHOD_ID, and the signature for the specific overload,
535 specified by SIGNATURE_ID. Note that this function is g++ specific. */
538 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
540 int mangled_name_len
;
542 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
543 struct fn_field
*method
= &f
[signature_id
];
544 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
545 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
546 const char *newname
= type_name_no_tag (type
);
548 /* Does the form of physname indicate that it is the full mangled name
549 of a constructor (not just the args)? */
550 int is_full_physname_constructor
;
553 int is_destructor
= is_destructor_name (physname
);
554 /* Need a new type prefix. */
555 const char *const_prefix
= method
->is_const
? "C" : "";
556 const char *volatile_prefix
= method
->is_volatile
? "V" : "";
558 int len
= (newname
== NULL
? 0 : strlen (newname
));
560 /* Nothing to do if physname already contains a fully mangled v3 abi name
561 or an operator name. */
562 if ((physname
[0] == '_' && physname
[1] == 'Z')
563 || is_operator_name (field_name
))
564 return xstrdup (physname
);
566 is_full_physname_constructor
= is_constructor_name (physname
);
568 is_constructor
= is_full_physname_constructor
569 || (newname
&& strcmp (field_name
, newname
) == 0);
572 is_destructor
= (startswith (physname
, "__dt"));
574 if (is_destructor
|| is_full_physname_constructor
)
576 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
577 strcpy (mangled_name
, physname
);
583 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
585 else if (physname
[0] == 't' || physname
[0] == 'Q')
587 /* The physname for template and qualified methods already includes
589 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
595 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
596 volatile_prefix
, len
);
598 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
599 + strlen (buf
) + len
+ strlen (physname
) + 1);
601 mangled_name
= (char *) xmalloc (mangled_name_len
);
603 mangled_name
[0] = '\0';
605 strcpy (mangled_name
, field_name
);
607 strcat (mangled_name
, buf
);
608 /* If the class doesn't have a name, i.e. newname NULL, then we just
609 mangle it using 0 for the length of the class. Thus it gets mangled
610 as something starting with `::' rather than `classname::'. */
612 strcat (mangled_name
, newname
);
614 strcat (mangled_name
, physname
);
615 return (mangled_name
);
618 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
619 correctly allocated. */
622 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
624 struct obstack
*obstack
)
626 if (gsymbol
->language
== language_ada
)
630 gsymbol
->ada_mangled
= 0;
631 gsymbol
->language_specific
.obstack
= obstack
;
635 gsymbol
->ada_mangled
= 1;
636 gsymbol
->language_specific
.demangled_name
= name
;
640 gsymbol
->language_specific
.demangled_name
= name
;
643 /* Return the demangled name of GSYMBOL. */
646 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
648 if (gsymbol
->language
== language_ada
)
650 if (!gsymbol
->ada_mangled
)
655 return gsymbol
->language_specific
.demangled_name
;
659 /* Initialize the language dependent portion of a symbol
660 depending upon the language for the symbol. */
663 symbol_set_language (struct general_symbol_info
*gsymbol
,
664 enum language language
,
665 struct obstack
*obstack
)
667 gsymbol
->language
= language
;
668 if (gsymbol
->language
== language_cplus
669 || gsymbol
->language
== language_d
670 || gsymbol
->language
== language_go
671 || gsymbol
->language
== language_java
672 || gsymbol
->language
== language_objc
673 || gsymbol
->language
== language_fortran
)
675 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
677 else if (gsymbol
->language
== language_ada
)
679 gdb_assert (gsymbol
->ada_mangled
== 0);
680 gsymbol
->language_specific
.obstack
= obstack
;
684 memset (&gsymbol
->language_specific
, 0,
685 sizeof (gsymbol
->language_specific
));
689 /* Functions to initialize a symbol's mangled name. */
691 /* Objects of this type are stored in the demangled name hash table. */
692 struct demangled_name_entry
698 /* Hash function for the demangled name hash. */
701 hash_demangled_name_entry (const void *data
)
703 const struct demangled_name_entry
*e
704 = (const struct demangled_name_entry
*) data
;
706 return htab_hash_string (e
->mangled
);
709 /* Equality function for the demangled name hash. */
712 eq_demangled_name_entry (const void *a
, const void *b
)
714 const struct demangled_name_entry
*da
715 = (const struct demangled_name_entry
*) a
;
716 const struct demangled_name_entry
*db
717 = (const struct demangled_name_entry
*) b
;
719 return strcmp (da
->mangled
, db
->mangled
) == 0;
722 /* Create the hash table used for demangled names. Each hash entry is
723 a pair of strings; one for the mangled name and one for the demangled
724 name. The entry is hashed via just the mangled name. */
727 create_demangled_names_hash (struct objfile
*objfile
)
729 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
730 The hash table code will round this up to the next prime number.
731 Choosing a much larger table size wastes memory, and saves only about
732 1% in symbol reading. */
734 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
735 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
736 NULL
, xcalloc
, xfree
);
739 /* Try to determine the demangled name for a symbol, based on the
740 language of that symbol. If the language is set to language_auto,
741 it will attempt to find any demangling algorithm that works and
742 then set the language appropriately. The returned name is allocated
743 by the demangler and should be xfree'd. */
746 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
749 char *demangled
= NULL
;
751 if (gsymbol
->language
== language_unknown
)
752 gsymbol
->language
= language_auto
;
754 if (gsymbol
->language
== language_objc
755 || gsymbol
->language
== language_auto
)
758 objc_demangle (mangled
, 0);
759 if (demangled
!= NULL
)
761 gsymbol
->language
= language_objc
;
765 if (gsymbol
->language
== language_cplus
766 || gsymbol
->language
== language_auto
)
769 gdb_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
770 if (demangled
!= NULL
)
772 gsymbol
->language
= language_cplus
;
776 if (gsymbol
->language
== language_java
)
779 gdb_demangle (mangled
,
780 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
781 if (demangled
!= NULL
)
783 gsymbol
->language
= language_java
;
787 if (gsymbol
->language
== language_d
788 || gsymbol
->language
== language_auto
)
790 demangled
= d_demangle(mangled
, 0);
791 if (demangled
!= NULL
)
793 gsymbol
->language
= language_d
;
797 /* FIXME(dje): Continually adding languages here is clumsy.
798 Better to just call la_demangle if !auto, and if auto then call
799 a utility routine that tries successive languages in turn and reports
800 which one it finds. I realize the la_demangle options may be different
801 for different languages but there's already a FIXME for that. */
802 if (gsymbol
->language
== language_go
803 || gsymbol
->language
== language_auto
)
805 demangled
= go_demangle (mangled
, 0);
806 if (demangled
!= NULL
)
808 gsymbol
->language
= language_go
;
813 /* We could support `gsymbol->language == language_fortran' here to provide
814 module namespaces also for inferiors with only minimal symbol table (ELF
815 symbols). Just the mangling standard is not standardized across compilers
816 and there is no DW_AT_producer available for inferiors with only the ELF
817 symbols to check the mangling kind. */
819 /* Check for Ada symbols last. See comment below explaining why. */
821 if (gsymbol
->language
== language_auto
)
823 const char *demangled
= ada_decode (mangled
);
825 if (demangled
!= mangled
&& demangled
!= NULL
&& demangled
[0] != '<')
827 /* Set the gsymbol language to Ada, but still return NULL.
828 Two reasons for that:
830 1. For Ada, we prefer computing the symbol's decoded name
831 on the fly rather than pre-compute it, in order to save
832 memory (Ada projects are typically very large).
834 2. There are some areas in the definition of the GNAT
835 encoding where, with a bit of bad luck, we might be able
836 to decode a non-Ada symbol, generating an incorrect
837 demangled name (Eg: names ending with "TB" for instance
838 are identified as task bodies and so stripped from
839 the decoded name returned).
841 Returning NULL, here, helps us get a little bit of
842 the best of both worlds. Because we're last, we should
843 not affect any of the other languages that were able to
844 demangle the symbol before us; we get to correctly tag
845 Ada symbols as such; and even if we incorrectly tagged
846 a non-Ada symbol, which should be rare, any routing
847 through the Ada language should be transparent (Ada
848 tries to behave much like C/C++ with non-Ada symbols). */
849 gsymbol
->language
= language_ada
;
857 /* Set both the mangled and demangled (if any) names for GSYMBOL based
858 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
859 objfile's obstack; but if COPY_NAME is 0 and if NAME is
860 NUL-terminated, then this function assumes that NAME is already
861 correctly saved (either permanently or with a lifetime tied to the
862 objfile), and it will not be copied.
864 The hash table corresponding to OBJFILE is used, and the memory
865 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
866 so the pointer can be discarded after calling this function. */
868 /* We have to be careful when dealing with Java names: when we run
869 into a Java minimal symbol, we don't know it's a Java symbol, so it
870 gets demangled as a C++ name. This is unfortunate, but there's not
871 much we can do about it: but when demangling partial symbols and
872 regular symbols, we'd better not reuse the wrong demangled name.
873 (See PR gdb/1039.) We solve this by putting a distinctive prefix
874 on Java names when storing them in the hash table. */
876 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
877 don't mind the Java prefix so much: different languages have
878 different demangling requirements, so it's only natural that we
879 need to keep language data around in our demangling cache. But
880 it's not good that the minimal symbol has the wrong demangled name.
881 Unfortunately, I can't think of any easy solution to that
884 #define JAVA_PREFIX "##JAVA$$"
885 #define JAVA_PREFIX_LEN 8
888 symbol_set_names (struct general_symbol_info
*gsymbol
,
889 const char *linkage_name
, int len
, int copy_name
,
890 struct objfile
*objfile
)
892 struct demangled_name_entry
**slot
;
893 /* A 0-terminated copy of the linkage name. */
894 const char *linkage_name_copy
;
895 /* A copy of the linkage name that might have a special Java prefix
896 added to it, for use when looking names up in the hash table. */
897 const char *lookup_name
;
898 /* The length of lookup_name. */
900 struct demangled_name_entry entry
;
901 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
903 if (gsymbol
->language
== language_ada
)
905 /* In Ada, we do the symbol lookups using the mangled name, so
906 we can save some space by not storing the demangled name.
908 As a side note, we have also observed some overlap between
909 the C++ mangling and Ada mangling, similarly to what has
910 been observed with Java. Because we don't store the demangled
911 name with the symbol, we don't need to use the same trick
914 gsymbol
->name
= linkage_name
;
917 char *name
= (char *) obstack_alloc (&per_bfd
->storage_obstack
,
920 memcpy (name
, linkage_name
, len
);
922 gsymbol
->name
= name
;
924 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
929 if (per_bfd
->demangled_names_hash
== NULL
)
930 create_demangled_names_hash (objfile
);
932 /* The stabs reader generally provides names that are not
933 NUL-terminated; most of the other readers don't do this, so we
934 can just use the given copy, unless we're in the Java case. */
935 if (gsymbol
->language
== language_java
)
939 lookup_len
= len
+ JAVA_PREFIX_LEN
;
940 alloc_name
= (char *) alloca (lookup_len
+ 1);
941 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
942 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
943 alloc_name
[lookup_len
] = '\0';
945 lookup_name
= alloc_name
;
946 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
948 else if (linkage_name
[len
] != '\0')
953 alloc_name
= (char *) alloca (lookup_len
+ 1);
954 memcpy (alloc_name
, linkage_name
, len
);
955 alloc_name
[lookup_len
] = '\0';
957 lookup_name
= alloc_name
;
958 linkage_name_copy
= alloc_name
;
963 lookup_name
= linkage_name
;
964 linkage_name_copy
= linkage_name
;
967 entry
.mangled
= lookup_name
;
968 slot
= ((struct demangled_name_entry
**)
969 htab_find_slot (per_bfd
->demangled_names_hash
,
972 /* If this name is not in the hash table, add it. */
974 /* A C version of the symbol may have already snuck into the table.
975 This happens to, e.g., main.init (__go_init_main). Cope. */
976 || (gsymbol
->language
== language_go
977 && (*slot
)->demangled
[0] == '\0'))
979 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
981 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
983 /* Suppose we have demangled_name==NULL, copy_name==0, and
984 lookup_name==linkage_name. In this case, we already have the
985 mangled name saved, and we don't have a demangled name. So,
986 you might think we could save a little space by not recording
987 this in the hash table at all.
989 It turns out that it is actually important to still save such
990 an entry in the hash table, because storing this name gives
991 us better bcache hit rates for partial symbols. */
992 if (!copy_name
&& lookup_name
== linkage_name
)
995 = ((struct demangled_name_entry
*)
996 obstack_alloc (&per_bfd
->storage_obstack
,
997 offsetof (struct demangled_name_entry
, demangled
)
998 + demangled_len
+ 1));
999 (*slot
)->mangled
= lookup_name
;
1005 /* If we must copy the mangled name, put it directly after
1006 the demangled name so we can have a single
1009 = ((struct demangled_name_entry
*)
1010 obstack_alloc (&per_bfd
->storage_obstack
,
1011 offsetof (struct demangled_name_entry
, demangled
)
1012 + lookup_len
+ demangled_len
+ 2));
1013 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
1014 strcpy (mangled_ptr
, lookup_name
);
1015 (*slot
)->mangled
= mangled_ptr
;
1018 if (demangled_name
!= NULL
)
1020 strcpy ((*slot
)->demangled
, demangled_name
);
1021 xfree (demangled_name
);
1024 (*slot
)->demangled
[0] = '\0';
1027 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
1028 if ((*slot
)->demangled
[0] != '\0')
1029 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
1030 &per_bfd
->storage_obstack
);
1032 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
1035 /* Return the source code name of a symbol. In languages where
1036 demangling is necessary, this is the demangled name. */
1039 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
1041 switch (gsymbol
->language
)
1043 case language_cplus
:
1048 case language_fortran
:
1049 if (symbol_get_demangled_name (gsymbol
) != NULL
)
1050 return symbol_get_demangled_name (gsymbol
);
1053 return ada_decode_symbol (gsymbol
);
1057 return gsymbol
->name
;
1060 /* Return the demangled name for a symbol based on the language for
1061 that symbol. If no demangled name exists, return NULL. */
1064 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
1066 const char *dem_name
= NULL
;
1068 switch (gsymbol
->language
)
1070 case language_cplus
:
1075 case language_fortran
:
1076 dem_name
= symbol_get_demangled_name (gsymbol
);
1079 dem_name
= ada_decode_symbol (gsymbol
);
1087 /* Return the search name of a symbol---generally the demangled or
1088 linkage name of the symbol, depending on how it will be searched for.
1089 If there is no distinct demangled name, then returns the same value
1090 (same pointer) as SYMBOL_LINKAGE_NAME. */
1093 symbol_search_name (const struct general_symbol_info
*gsymbol
)
1095 if (gsymbol
->language
== language_ada
)
1096 return gsymbol
->name
;
1098 return symbol_natural_name (gsymbol
);
1101 /* Initialize the structure fields to zero values. */
1104 init_sal (struct symtab_and_line
*sal
)
1106 memset (sal
, 0, sizeof (*sal
));
1110 /* Return 1 if the two sections are the same, or if they could
1111 plausibly be copies of each other, one in an original object
1112 file and another in a separated debug file. */
1115 matching_obj_sections (struct obj_section
*obj_first
,
1116 struct obj_section
*obj_second
)
1118 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
1119 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1120 struct objfile
*obj
;
1122 /* If they're the same section, then they match. */
1123 if (first
== second
)
1126 /* If either is NULL, give up. */
1127 if (first
== NULL
|| second
== NULL
)
1130 /* This doesn't apply to absolute symbols. */
1131 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1134 /* If they're in the same object file, they must be different sections. */
1135 if (first
->owner
== second
->owner
)
1138 /* Check whether the two sections are potentially corresponding. They must
1139 have the same size, address, and name. We can't compare section indexes,
1140 which would be more reliable, because some sections may have been
1142 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
1145 /* In-memory addresses may start at a different offset, relativize them. */
1146 if (bfd_get_section_vma (first
->owner
, first
)
1147 - bfd_get_start_address (first
->owner
)
1148 != bfd_get_section_vma (second
->owner
, second
)
1149 - bfd_get_start_address (second
->owner
))
1152 if (bfd_get_section_name (first
->owner
, first
) == NULL
1153 || bfd_get_section_name (second
->owner
, second
) == NULL
1154 || strcmp (bfd_get_section_name (first
->owner
, first
),
1155 bfd_get_section_name (second
->owner
, second
)) != 0)
1158 /* Otherwise check that they are in corresponding objfiles. */
1161 if (obj
->obfd
== first
->owner
)
1163 gdb_assert (obj
!= NULL
);
1165 if (obj
->separate_debug_objfile
!= NULL
1166 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1168 if (obj
->separate_debug_objfile_backlink
!= NULL
1169 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1178 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1180 struct objfile
*objfile
;
1181 struct bound_minimal_symbol msymbol
;
1183 /* If we know that this is not a text address, return failure. This is
1184 necessary because we loop based on texthigh and textlow, which do
1185 not include the data ranges. */
1186 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1188 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1189 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1190 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1191 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1192 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1195 ALL_OBJFILES (objfile
)
1197 struct compunit_symtab
*cust
= NULL
;
1200 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1207 /* Hash function for the symbol cache. */
1210 hash_symbol_entry (const struct objfile
*objfile_context
,
1211 const char *name
, domain_enum domain
)
1213 unsigned int hash
= (uintptr_t) objfile_context
;
1216 hash
+= htab_hash_string (name
);
1218 /* Because of symbol_matches_domain we need VAR_DOMAIN and STRUCT_DOMAIN
1219 to map to the same slot. */
1220 if (domain
== STRUCT_DOMAIN
)
1221 hash
+= VAR_DOMAIN
* 7;
1228 /* Equality function for the symbol cache. */
1231 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1232 const struct objfile
*objfile_context
,
1233 const char *name
, domain_enum domain
)
1235 const char *slot_name
;
1236 domain_enum slot_domain
;
1238 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1241 if (slot
->objfile_context
!= objfile_context
)
1244 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1246 slot_name
= slot
->value
.not_found
.name
;
1247 slot_domain
= slot
->value
.not_found
.domain
;
1251 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
.symbol
);
1252 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
.symbol
);
1255 /* NULL names match. */
1256 if (slot_name
== NULL
&& name
== NULL
)
1258 /* But there's no point in calling symbol_matches_domain in the
1259 SYMBOL_SLOT_FOUND case. */
1260 if (slot_domain
!= domain
)
1263 else if (slot_name
!= NULL
&& name
!= NULL
)
1265 /* It's important that we use the same comparison that was done the
1266 first time through. If the slot records a found symbol, then this
1267 means using strcmp_iw on SYMBOL_SEARCH_NAME. See dictionary.c.
1268 It also means using symbol_matches_domain for found symbols.
1271 If the slot records a not-found symbol, then require a precise match.
1272 We could still be lax with whitespace like strcmp_iw though. */
1274 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1276 if (strcmp (slot_name
, name
) != 0)
1278 if (slot_domain
!= domain
)
1283 struct symbol
*sym
= slot
->value
.found
.symbol
;
1285 if (strcmp_iw (slot_name
, name
) != 0)
1287 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1288 slot_domain
, domain
))
1294 /* Only one name is NULL. */
1301 /* Given a cache of size SIZE, return the size of the struct (with variable
1302 length array) in bytes. */
1305 symbol_cache_byte_size (unsigned int size
)
1307 return (sizeof (struct block_symbol_cache
)
1308 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1314 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1316 /* If there's no change in size, don't do anything.
1317 All caches have the same size, so we can just compare with the size
1318 of the global symbols cache. */
1319 if ((cache
->global_symbols
!= NULL
1320 && cache
->global_symbols
->size
== new_size
)
1321 || (cache
->global_symbols
== NULL
1325 xfree (cache
->global_symbols
);
1326 xfree (cache
->static_symbols
);
1330 cache
->global_symbols
= NULL
;
1331 cache
->static_symbols
= NULL
;
1335 size_t total_size
= symbol_cache_byte_size (new_size
);
1337 cache
->global_symbols
1338 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1339 cache
->static_symbols
1340 = (struct block_symbol_cache
*) xcalloc (1, total_size
);
1341 cache
->global_symbols
->size
= new_size
;
1342 cache
->static_symbols
->size
= new_size
;
1346 /* Make a symbol cache of size SIZE. */
1348 static struct symbol_cache
*
1349 make_symbol_cache (unsigned int size
)
1351 struct symbol_cache
*cache
;
1353 cache
= XCNEW (struct symbol_cache
);
1354 resize_symbol_cache (cache
, symbol_cache_size
);
1358 /* Free the space used by CACHE. */
1361 free_symbol_cache (struct symbol_cache
*cache
)
1363 xfree (cache
->global_symbols
);
1364 xfree (cache
->static_symbols
);
1368 /* Return the symbol cache of PSPACE.
1369 Create one if it doesn't exist yet. */
1371 static struct symbol_cache
*
1372 get_symbol_cache (struct program_space
*pspace
)
1374 struct symbol_cache
*cache
1375 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1379 cache
= make_symbol_cache (symbol_cache_size
);
1380 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1386 /* Delete the symbol cache of PSPACE.
1387 Called when PSPACE is destroyed. */
1390 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1392 struct symbol_cache
*cache
= (struct symbol_cache
*) data
;
1394 free_symbol_cache (cache
);
1397 /* Set the size of the symbol cache in all program spaces. */
1400 set_symbol_cache_size (unsigned int new_size
)
1402 struct program_space
*pspace
;
1404 ALL_PSPACES (pspace
)
1406 struct symbol_cache
*cache
1407 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1409 /* The pspace could have been created but not have a cache yet. */
1411 resize_symbol_cache (cache
, new_size
);
1415 /* Called when symbol-cache-size is set. */
1418 set_symbol_cache_size_handler (char *args
, int from_tty
,
1419 struct cmd_list_element
*c
)
1421 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1423 /* Restore the previous value.
1424 This is the value the "show" command prints. */
1425 new_symbol_cache_size
= symbol_cache_size
;
1427 error (_("Symbol cache size is too large, max is %u."),
1428 MAX_SYMBOL_CACHE_SIZE
);
1430 symbol_cache_size
= new_symbol_cache_size
;
1432 set_symbol_cache_size (symbol_cache_size
);
1435 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1436 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1437 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1438 failed (and thus this one will too), or NULL if the symbol is not present
1440 If the symbol is not present in the cache, then *BSC_PTR and *SLOT_PTR are
1441 set to the cache and slot of the symbol to save the result of a full lookup
1444 static struct block_symbol
1445 symbol_cache_lookup (struct symbol_cache
*cache
,
1446 struct objfile
*objfile_context
, int block
,
1447 const char *name
, domain_enum domain
,
1448 struct block_symbol_cache
**bsc_ptr
,
1449 struct symbol_cache_slot
**slot_ptr
)
1451 struct block_symbol_cache
*bsc
;
1453 struct symbol_cache_slot
*slot
;
1455 if (block
== GLOBAL_BLOCK
)
1456 bsc
= cache
->global_symbols
;
1458 bsc
= cache
->static_symbols
;
1463 return (struct block_symbol
) {NULL
, NULL
};
1466 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1467 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1469 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1471 if (symbol_lookup_debug
)
1472 fprintf_unfiltered (gdb_stdlog
,
1473 "%s block symbol cache hit%s for %s, %s\n",
1474 block
== GLOBAL_BLOCK
? "Global" : "Static",
1475 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1476 ? " (not found)" : "",
1477 name
, domain_name (domain
));
1479 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1480 return SYMBOL_LOOKUP_FAILED
;
1481 return slot
->value
.found
;
1484 /* Symbol is not present in the cache. */
1489 if (symbol_lookup_debug
)
1491 fprintf_unfiltered (gdb_stdlog
,
1492 "%s block symbol cache miss for %s, %s\n",
1493 block
== GLOBAL_BLOCK
? "Global" : "Static",
1494 name
, domain_name (domain
));
1497 return (struct block_symbol
) {NULL
, NULL
};
1500 /* Clear out SLOT. */
1503 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1505 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1506 xfree (slot
->value
.not_found
.name
);
1507 slot
->state
= SYMBOL_SLOT_UNUSED
;
1510 /* Mark SYMBOL as found in SLOT.
1511 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1512 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1513 necessarily the objfile the symbol was found in. */
1516 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1517 struct symbol_cache_slot
*slot
,
1518 struct objfile
*objfile_context
,
1519 struct symbol
*symbol
,
1520 const struct block
*block
)
1524 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1527 symbol_cache_clear_slot (slot
);
1529 slot
->state
= SYMBOL_SLOT_FOUND
;
1530 slot
->objfile_context
= objfile_context
;
1531 slot
->value
.found
.symbol
= symbol
;
1532 slot
->value
.found
.block
= block
;
1535 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1536 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1537 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1540 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1541 struct symbol_cache_slot
*slot
,
1542 struct objfile
*objfile_context
,
1543 const char *name
, domain_enum domain
)
1547 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1550 symbol_cache_clear_slot (slot
);
1552 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1553 slot
->objfile_context
= objfile_context
;
1554 slot
->value
.not_found
.name
= xstrdup (name
);
1555 slot
->value
.not_found
.domain
= domain
;
1558 /* Flush the symbol cache of PSPACE. */
1561 symbol_cache_flush (struct program_space
*pspace
)
1563 struct symbol_cache
*cache
1564 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1570 if (cache
->global_symbols
== NULL
)
1572 gdb_assert (symbol_cache_size
== 0);
1573 gdb_assert (cache
->static_symbols
== NULL
);
1577 /* If the cache is untouched since the last flush, early exit.
1578 This is important for performance during the startup of a program linked
1579 with 100s (or 1000s) of shared libraries. */
1580 if (cache
->global_symbols
->misses
== 0
1581 && cache
->static_symbols
->misses
== 0)
1584 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1585 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1587 for (pass
= 0; pass
< 2; ++pass
)
1589 struct block_symbol_cache
*bsc
1590 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1593 for (i
= 0; i
< bsc
->size
; ++i
)
1594 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1597 cache
->global_symbols
->hits
= 0;
1598 cache
->global_symbols
->misses
= 0;
1599 cache
->global_symbols
->collisions
= 0;
1600 cache
->static_symbols
->hits
= 0;
1601 cache
->static_symbols
->misses
= 0;
1602 cache
->static_symbols
->collisions
= 0;
1608 symbol_cache_dump (const struct symbol_cache
*cache
)
1612 if (cache
->global_symbols
== NULL
)
1614 printf_filtered (" <disabled>\n");
1618 for (pass
= 0; pass
< 2; ++pass
)
1620 const struct block_symbol_cache
*bsc
1621 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1625 printf_filtered ("Global symbols:\n");
1627 printf_filtered ("Static symbols:\n");
1629 for (i
= 0; i
< bsc
->size
; ++i
)
1631 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1635 switch (slot
->state
)
1637 case SYMBOL_SLOT_UNUSED
:
1639 case SYMBOL_SLOT_NOT_FOUND
:
1640 printf_filtered (" [%4u] = %s, %s %s (not found)\n", i
,
1641 host_address_to_string (slot
->objfile_context
),
1642 slot
->value
.not_found
.name
,
1643 domain_name (slot
->value
.not_found
.domain
));
1645 case SYMBOL_SLOT_FOUND
:
1647 struct symbol
*found
= slot
->value
.found
.symbol
;
1648 const struct objfile
*context
= slot
->objfile_context
;
1650 printf_filtered (" [%4u] = %s, %s %s\n", i
,
1651 host_address_to_string (context
),
1652 SYMBOL_PRINT_NAME (found
),
1653 domain_name (SYMBOL_DOMAIN (found
)));
1661 /* The "mt print symbol-cache" command. */
1664 maintenance_print_symbol_cache (char *args
, int from_tty
)
1666 struct program_space
*pspace
;
1668 ALL_PSPACES (pspace
)
1670 struct symbol_cache
*cache
;
1672 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1674 pspace
->symfile_object_file
!= NULL
1675 ? objfile_name (pspace
->symfile_object_file
)
1676 : "(no object file)");
1678 /* If the cache hasn't been created yet, avoid creating one. */
1680 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1682 printf_filtered (" <empty>\n");
1684 symbol_cache_dump (cache
);
1688 /* The "mt flush-symbol-cache" command. */
1691 maintenance_flush_symbol_cache (char *args
, int from_tty
)
1693 struct program_space
*pspace
;
1695 ALL_PSPACES (pspace
)
1697 symbol_cache_flush (pspace
);
1701 /* Print usage statistics of CACHE. */
1704 symbol_cache_stats (struct symbol_cache
*cache
)
1708 if (cache
->global_symbols
== NULL
)
1710 printf_filtered (" <disabled>\n");
1714 for (pass
= 0; pass
< 2; ++pass
)
1716 const struct block_symbol_cache
*bsc
1717 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1722 printf_filtered ("Global block cache stats:\n");
1724 printf_filtered ("Static block cache stats:\n");
1726 printf_filtered (" size: %u\n", bsc
->size
);
1727 printf_filtered (" hits: %u\n", bsc
->hits
);
1728 printf_filtered (" misses: %u\n", bsc
->misses
);
1729 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1733 /* The "mt print symbol-cache-statistics" command. */
1736 maintenance_print_symbol_cache_statistics (char *args
, int from_tty
)
1738 struct program_space
*pspace
;
1740 ALL_PSPACES (pspace
)
1742 struct symbol_cache
*cache
;
1744 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1746 pspace
->symfile_object_file
!= NULL
1747 ? objfile_name (pspace
->symfile_object_file
)
1748 : "(no object file)");
1750 /* If the cache hasn't been created yet, avoid creating one. */
1752 = (struct symbol_cache
*) program_space_data (pspace
, symbol_cache_key
);
1754 printf_filtered (" empty, no stats available\n");
1756 symbol_cache_stats (cache
);
1760 /* This module's 'new_objfile' observer. */
1763 symtab_new_objfile_observer (struct objfile
*objfile
)
1765 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1766 symbol_cache_flush (current_program_space
);
1769 /* This module's 'free_objfile' observer. */
1772 symtab_free_objfile_observer (struct objfile
*objfile
)
1774 symbol_cache_flush (objfile
->pspace
);
1777 /* Debug symbols usually don't have section information. We need to dig that
1778 out of the minimal symbols and stash that in the debug symbol. */
1781 fixup_section (struct general_symbol_info
*ginfo
,
1782 CORE_ADDR addr
, struct objfile
*objfile
)
1784 struct minimal_symbol
*msym
;
1786 /* First, check whether a minimal symbol with the same name exists
1787 and points to the same address. The address check is required
1788 e.g. on PowerPC64, where the minimal symbol for a function will
1789 point to the function descriptor, while the debug symbol will
1790 point to the actual function code. */
1791 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1793 ginfo
->section
= MSYMBOL_SECTION (msym
);
1796 /* Static, function-local variables do appear in the linker
1797 (minimal) symbols, but are frequently given names that won't
1798 be found via lookup_minimal_symbol(). E.g., it has been
1799 observed in frv-uclinux (ELF) executables that a static,
1800 function-local variable named "foo" might appear in the
1801 linker symbols as "foo.6" or "foo.3". Thus, there is no
1802 point in attempting to extend the lookup-by-name mechanism to
1803 handle this case due to the fact that there can be multiple
1806 So, instead, search the section table when lookup by name has
1807 failed. The ``addr'' and ``endaddr'' fields may have already
1808 been relocated. If so, the relocation offset (i.e. the
1809 ANOFFSET value) needs to be subtracted from these values when
1810 performing the comparison. We unconditionally subtract it,
1811 because, when no relocation has been performed, the ANOFFSET
1812 value will simply be zero.
1814 The address of the symbol whose section we're fixing up HAS
1815 NOT BEEN adjusted (relocated) yet. It can't have been since
1816 the section isn't yet known and knowing the section is
1817 necessary in order to add the correct relocation value. In
1818 other words, we wouldn't even be in this function (attempting
1819 to compute the section) if it were already known.
1821 Note that it is possible to search the minimal symbols
1822 (subtracting the relocation value if necessary) to find the
1823 matching minimal symbol, but this is overkill and much less
1824 efficient. It is not necessary to find the matching minimal
1825 symbol, only its section.
1827 Note that this technique (of doing a section table search)
1828 can fail when unrelocated section addresses overlap. For
1829 this reason, we still attempt a lookup by name prior to doing
1830 a search of the section table. */
1832 struct obj_section
*s
;
1835 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1837 int idx
= s
- objfile
->sections
;
1838 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1843 if (obj_section_addr (s
) - offset
<= addr
1844 && addr
< obj_section_endaddr (s
) - offset
)
1846 ginfo
->section
= idx
;
1851 /* If we didn't find the section, assume it is in the first
1852 section. If there is no allocated section, then it hardly
1853 matters what we pick, so just pick zero. */
1857 ginfo
->section
= fallback
;
1862 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1869 if (!SYMBOL_OBJFILE_OWNED (sym
))
1872 /* We either have an OBJFILE, or we can get at it from the sym's
1873 symtab. Anything else is a bug. */
1874 gdb_assert (objfile
|| symbol_symtab (sym
));
1876 if (objfile
== NULL
)
1877 objfile
= symbol_objfile (sym
);
1879 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1882 /* We should have an objfile by now. */
1883 gdb_assert (objfile
);
1885 switch (SYMBOL_CLASS (sym
))
1889 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1892 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1896 /* Nothing else will be listed in the minsyms -- no use looking
1901 fixup_section (&sym
->ginfo
, addr
, objfile
);
1906 /* Compute the demangled form of NAME as used by the various symbol
1907 lookup functions. The result is stored in *RESULT_NAME. Returns a
1908 cleanup which can be used to clean up the result.
1910 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1911 Normally, Ada symbol lookups are performed using the encoded name
1912 rather than the demangled name, and so it might seem to make sense
1913 for this function to return an encoded version of NAME.
1914 Unfortunately, we cannot do this, because this function is used in
1915 circumstances where it is not appropriate to try to encode NAME.
1916 For instance, when displaying the frame info, we demangle the name
1917 of each parameter, and then perform a symbol lookup inside our
1918 function using that demangled name. In Ada, certain functions
1919 have internally-generated parameters whose name contain uppercase
1920 characters. Encoding those name would result in those uppercase
1921 characters to become lowercase, and thus cause the symbol lookup
1925 demangle_for_lookup (const char *name
, enum language lang
,
1926 const char **result_name
)
1928 char *demangled_name
= NULL
;
1929 const char *modified_name
= NULL
;
1930 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1932 modified_name
= name
;
1934 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1935 lookup, so we can always binary search. */
1936 if (lang
== language_cplus
)
1938 demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1941 modified_name
= demangled_name
;
1942 make_cleanup (xfree
, demangled_name
);
1946 /* If we were given a non-mangled name, canonicalize it
1947 according to the language (so far only for C++). */
1948 demangled_name
= cp_canonicalize_string (name
);
1951 modified_name
= demangled_name
;
1952 make_cleanup (xfree
, demangled_name
);
1956 else if (lang
== language_java
)
1958 demangled_name
= gdb_demangle (name
,
1959 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1962 modified_name
= demangled_name
;
1963 make_cleanup (xfree
, demangled_name
);
1966 else if (lang
== language_d
)
1968 demangled_name
= d_demangle (name
, 0);
1971 modified_name
= demangled_name
;
1972 make_cleanup (xfree
, demangled_name
);
1975 else if (lang
== language_go
)
1977 demangled_name
= go_demangle (name
, 0);
1980 modified_name
= demangled_name
;
1981 make_cleanup (xfree
, demangled_name
);
1985 *result_name
= modified_name
;
1991 This function (or rather its subordinates) have a bunch of loops and
1992 it would seem to be attractive to put in some QUIT's (though I'm not really
1993 sure whether it can run long enough to be really important). But there
1994 are a few calls for which it would appear to be bad news to quit
1995 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1996 that there is C++ code below which can error(), but that probably
1997 doesn't affect these calls since they are looking for a known
1998 variable and thus can probably assume it will never hit the C++
2002 lookup_symbol_in_language (const char *name
, const struct block
*block
,
2003 const domain_enum domain
, enum language lang
,
2004 struct field_of_this_result
*is_a_field_of_this
)
2006 const char *modified_name
;
2007 struct block_symbol returnval
;
2008 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
2010 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
2011 is_a_field_of_this
);
2012 do_cleanups (cleanup
);
2020 lookup_symbol (const char *name
, const struct block
*block
,
2022 struct field_of_this_result
*is_a_field_of_this
)
2024 return lookup_symbol_in_language (name
, block
, domain
,
2025 current_language
->la_language
,
2026 is_a_field_of_this
);
2032 lookup_language_this (const struct language_defn
*lang
,
2033 const struct block
*block
)
2035 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
2036 return (struct block_symbol
) {NULL
, NULL
};
2038 if (symbol_lookup_debug
> 1)
2040 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2042 fprintf_unfiltered (gdb_stdlog
,
2043 "lookup_language_this (%s, %s (objfile %s))",
2044 lang
->la_name
, host_address_to_string (block
),
2045 objfile_debug_name (objfile
));
2052 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
2055 if (symbol_lookup_debug
> 1)
2057 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
2058 SYMBOL_PRINT_NAME (sym
),
2059 host_address_to_string (sym
),
2060 host_address_to_string (block
));
2062 return (struct block_symbol
) {sym
, block
};
2064 if (BLOCK_FUNCTION (block
))
2066 block
= BLOCK_SUPERBLOCK (block
);
2069 if (symbol_lookup_debug
> 1)
2070 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2071 return (struct block_symbol
) {NULL
, NULL
};
2074 /* Given TYPE, a structure/union,
2075 return 1 if the component named NAME from the ultimate target
2076 structure/union is defined, otherwise, return 0. */
2079 check_field (struct type
*type
, const char *name
,
2080 struct field_of_this_result
*is_a_field_of_this
)
2084 /* The type may be a stub. */
2085 type
= check_typedef (type
);
2087 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
2089 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
2091 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
2093 is_a_field_of_this
->type
= type
;
2094 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
2099 /* C++: If it was not found as a data field, then try to return it
2100 as a pointer to a method. */
2102 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
2104 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
2106 is_a_field_of_this
->type
= type
;
2107 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
2112 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
2113 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
2119 /* Behave like lookup_symbol except that NAME is the natural name
2120 (e.g., demangled name) of the symbol that we're looking for. */
2122 static struct block_symbol
2123 lookup_symbol_aux (const char *name
, const struct block
*block
,
2124 const domain_enum domain
, enum language language
,
2125 struct field_of_this_result
*is_a_field_of_this
)
2127 struct block_symbol result
;
2128 const struct language_defn
*langdef
;
2130 if (symbol_lookup_debug
)
2132 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2134 fprintf_unfiltered (gdb_stdlog
,
2135 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2136 name
, host_address_to_string (block
),
2138 ? objfile_debug_name (objfile
) : "NULL",
2139 domain_name (domain
), language_str (language
));
2142 /* Make sure we do something sensible with is_a_field_of_this, since
2143 the callers that set this parameter to some non-null value will
2144 certainly use it later. If we don't set it, the contents of
2145 is_a_field_of_this are undefined. */
2146 if (is_a_field_of_this
!= NULL
)
2147 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
2149 /* Search specified block and its superiors. Don't search
2150 STATIC_BLOCK or GLOBAL_BLOCK. */
2152 result
= lookup_local_symbol (name
, block
, domain
, language
);
2153 if (result
.symbol
!= NULL
)
2155 if (symbol_lookup_debug
)
2157 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2158 host_address_to_string (result
.symbol
));
2163 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2164 check to see if NAME is a field of `this'. */
2166 langdef
= language_def (language
);
2168 /* Don't do this check if we are searching for a struct. It will
2169 not be found by check_field, but will be found by other
2171 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
2173 result
= lookup_language_this (langdef
, block
);
2177 struct type
*t
= result
.symbol
->type
;
2179 /* I'm not really sure that type of this can ever
2180 be typedefed; just be safe. */
2181 t
= check_typedef (t
);
2182 if (TYPE_CODE (t
) == TYPE_CODE_PTR
2183 || TYPE_CODE (t
) == TYPE_CODE_REF
)
2184 t
= TYPE_TARGET_TYPE (t
);
2186 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
2187 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
2188 error (_("Internal error: `%s' is not an aggregate"),
2189 langdef
->la_name_of_this
);
2191 if (check_field (t
, name
, is_a_field_of_this
))
2193 if (symbol_lookup_debug
)
2195 fprintf_unfiltered (gdb_stdlog
,
2196 "lookup_symbol_aux (...) = NULL\n");
2198 return (struct block_symbol
) {NULL
, NULL
};
2203 /* Now do whatever is appropriate for LANGUAGE to look
2204 up static and global variables. */
2206 result
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2207 if (result
.symbol
!= NULL
)
2209 if (symbol_lookup_debug
)
2211 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2212 host_address_to_string (result
.symbol
));
2217 /* Now search all static file-level symbols. Not strictly correct,
2218 but more useful than an error. */
2220 result
= lookup_static_symbol (name
, domain
);
2221 if (symbol_lookup_debug
)
2223 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2224 result
.symbol
!= NULL
2225 ? host_address_to_string (result
.symbol
)
2231 /* Check to see if the symbol is defined in BLOCK or its superiors.
2232 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2234 static struct block_symbol
2235 lookup_local_symbol (const char *name
, const struct block
*block
,
2236 const domain_enum domain
,
2237 enum language language
)
2240 const struct block
*static_block
= block_static_block (block
);
2241 const char *scope
= block_scope (block
);
2243 /* Check if either no block is specified or it's a global block. */
2245 if (static_block
== NULL
)
2246 return (struct block_symbol
) {NULL
, NULL
};
2248 while (block
!= static_block
)
2250 sym
= lookup_symbol_in_block (name
, block
, domain
);
2252 return (struct block_symbol
) {sym
, block
};
2254 if (language
== language_cplus
|| language
== language_fortran
)
2256 struct block_symbol sym
2257 = cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2260 if (sym
.symbol
!= NULL
)
2264 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2266 block
= BLOCK_SUPERBLOCK (block
);
2269 /* We've reached the end of the function without finding a result. */
2271 return (struct block_symbol
) {NULL
, NULL
};
2277 lookup_objfile_from_block (const struct block
*block
)
2279 struct objfile
*obj
;
2280 struct compunit_symtab
*cust
;
2285 block
= block_global_block (block
);
2286 /* Look through all blockvectors. */
2287 ALL_COMPUNITS (obj
, cust
)
2288 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2291 if (obj
->separate_debug_objfile_backlink
)
2292 obj
= obj
->separate_debug_objfile_backlink
;
2303 lookup_symbol_in_block (const char *name
, const struct block
*block
,
2304 const domain_enum domain
)
2308 if (symbol_lookup_debug
> 1)
2310 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2312 fprintf_unfiltered (gdb_stdlog
,
2313 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2314 name
, host_address_to_string (block
),
2315 objfile_debug_name (objfile
),
2316 domain_name (domain
));
2319 sym
= block_lookup_symbol (block
, name
, domain
);
2322 if (symbol_lookup_debug
> 1)
2324 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2325 host_address_to_string (sym
));
2327 return fixup_symbol_section (sym
, NULL
);
2330 if (symbol_lookup_debug
> 1)
2331 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2338 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2340 const domain_enum domain
)
2342 struct objfile
*objfile
;
2344 for (objfile
= main_objfile
;
2346 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2348 struct block_symbol result
2349 = lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
, name
, domain
);
2351 if (result
.symbol
!= NULL
)
2355 return (struct block_symbol
) {NULL
, NULL
};
2358 /* Check to see if the symbol is defined in one of the OBJFILE's
2359 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2360 depending on whether or not we want to search global symbols or
2363 static struct block_symbol
2364 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2365 const char *name
, const domain_enum domain
)
2367 struct compunit_symtab
*cust
;
2369 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2371 if (symbol_lookup_debug
> 1)
2373 fprintf_unfiltered (gdb_stdlog
,
2374 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2375 objfile_debug_name (objfile
),
2376 block_index
== GLOBAL_BLOCK
2377 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2378 name
, domain_name (domain
));
2381 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2383 const struct blockvector
*bv
;
2384 const struct block
*block
;
2385 struct block_symbol result
;
2387 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2388 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2389 result
.symbol
= block_lookup_symbol_primary (block
, name
, domain
);
2390 result
.block
= block
;
2391 if (result
.symbol
!= NULL
)
2393 if (symbol_lookup_debug
> 1)
2395 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2396 host_address_to_string (result
.symbol
),
2397 host_address_to_string (block
));
2399 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2405 if (symbol_lookup_debug
> 1)
2406 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2407 return (struct block_symbol
) {NULL
, NULL
};
2410 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2411 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2412 and all associated separate debug objfiles.
2414 Normally we only look in OBJFILE, and not any separate debug objfiles
2415 because the outer loop will cause them to be searched too. This case is
2416 different. Here we're called from search_symbols where it will only
2417 call us for the the objfile that contains a matching minsym. */
2419 static struct block_symbol
2420 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2421 const char *linkage_name
,
2424 enum language lang
= current_language
->la_language
;
2425 const char *modified_name
;
2426 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
2428 struct objfile
*main_objfile
, *cur_objfile
;
2430 if (objfile
->separate_debug_objfile_backlink
)
2431 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2433 main_objfile
= objfile
;
2435 for (cur_objfile
= main_objfile
;
2437 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2439 struct block_symbol result
;
2441 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2442 modified_name
, domain
);
2443 if (result
.symbol
== NULL
)
2444 result
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2445 modified_name
, domain
);
2446 if (result
.symbol
!= NULL
)
2448 do_cleanups (cleanup
);
2453 do_cleanups (cleanup
);
2454 return (struct block_symbol
) {NULL
, NULL
};
2457 /* A helper function that throws an exception when a symbol was found
2458 in a psymtab but not in a symtab. */
2460 static void ATTRIBUTE_NORETURN
2461 error_in_psymtab_expansion (int block_index
, const char *name
,
2462 struct compunit_symtab
*cust
)
2465 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2466 %s may be an inlined function, or may be a template function\n \
2467 (if a template, try specifying an instantiation: %s<type>)."),
2468 block_index
== GLOBAL_BLOCK
? "global" : "static",
2470 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2474 /* A helper function for various lookup routines that interfaces with
2475 the "quick" symbol table functions. */
2477 static struct block_symbol
2478 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2479 const char *name
, const domain_enum domain
)
2481 struct compunit_symtab
*cust
;
2482 const struct blockvector
*bv
;
2483 const struct block
*block
;
2484 struct block_symbol result
;
2487 return (struct block_symbol
) {NULL
, NULL
};
2489 if (symbol_lookup_debug
> 1)
2491 fprintf_unfiltered (gdb_stdlog
,
2492 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2493 objfile_debug_name (objfile
),
2494 block_index
== GLOBAL_BLOCK
2495 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2496 name
, domain_name (domain
));
2499 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2502 if (symbol_lookup_debug
> 1)
2504 fprintf_unfiltered (gdb_stdlog
,
2505 "lookup_symbol_via_quick_fns (...) = NULL\n");
2507 return (struct block_symbol
) {NULL
, NULL
};
2510 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2511 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2512 result
.symbol
= block_lookup_symbol (block
, name
, domain
);
2513 if (result
.symbol
== NULL
)
2514 error_in_psymtab_expansion (block_index
, name
, cust
);
2516 if (symbol_lookup_debug
> 1)
2518 fprintf_unfiltered (gdb_stdlog
,
2519 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2520 host_address_to_string (result
.symbol
),
2521 host_address_to_string (block
));
2524 result
.symbol
= fixup_symbol_section (result
.symbol
, objfile
);
2525 result
.block
= block
;
2532 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2534 const struct block
*block
,
2535 const domain_enum domain
)
2537 struct block_symbol result
;
2539 /* NOTE: carlton/2003-05-19: The comments below were written when
2540 this (or what turned into this) was part of lookup_symbol_aux;
2541 I'm much less worried about these questions now, since these
2542 decisions have turned out well, but I leave these comments here
2545 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2546 not it would be appropriate to search the current global block
2547 here as well. (That's what this code used to do before the
2548 is_a_field_of_this check was moved up.) On the one hand, it's
2549 redundant with the lookup in all objfiles search that happens
2550 next. On the other hand, if decode_line_1 is passed an argument
2551 like filename:var, then the user presumably wants 'var' to be
2552 searched for in filename. On the third hand, there shouldn't be
2553 multiple global variables all of which are named 'var', and it's
2554 not like decode_line_1 has ever restricted its search to only
2555 global variables in a single filename. All in all, only
2556 searching the static block here seems best: it's correct and it's
2559 /* NOTE: carlton/2002-12-05: There's also a possible performance
2560 issue here: if you usually search for global symbols in the
2561 current file, then it would be slightly better to search the
2562 current global block before searching all the symtabs. But there
2563 are other factors that have a much greater effect on performance
2564 than that one, so I don't think we should worry about that for
2567 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2568 the current objfile. Searching the current objfile first is useful
2569 for both matching user expectations as well as performance. */
2571 result
= lookup_symbol_in_static_block (name
, block
, domain
);
2572 if (result
.symbol
!= NULL
)
2575 /* If we didn't find a definition for a builtin type in the static block,
2576 search for it now. This is actually the right thing to do and can be
2577 a massive performance win. E.g., when debugging a program with lots of
2578 shared libraries we could search all of them only to find out the
2579 builtin type isn't defined in any of them. This is common for types
2581 if (domain
== VAR_DOMAIN
)
2583 struct gdbarch
*gdbarch
;
2586 gdbarch
= target_gdbarch ();
2588 gdbarch
= block_gdbarch (block
);
2589 result
.symbol
= language_lookup_primitive_type_as_symbol (langdef
,
2591 result
.block
= NULL
;
2592 if (result
.symbol
!= NULL
)
2596 return lookup_global_symbol (name
, block
, domain
);
2602 lookup_symbol_in_static_block (const char *name
,
2603 const struct block
*block
,
2604 const domain_enum domain
)
2606 const struct block
*static_block
= block_static_block (block
);
2609 if (static_block
== NULL
)
2610 return (struct block_symbol
) {NULL
, NULL
};
2612 if (symbol_lookup_debug
)
2614 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2616 fprintf_unfiltered (gdb_stdlog
,
2617 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2620 host_address_to_string (block
),
2621 objfile_debug_name (objfile
),
2622 domain_name (domain
));
2625 sym
= lookup_symbol_in_block (name
, static_block
, domain
);
2626 if (symbol_lookup_debug
)
2628 fprintf_unfiltered (gdb_stdlog
,
2629 "lookup_symbol_in_static_block (...) = %s\n",
2630 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2632 return (struct block_symbol
) {sym
, static_block
};
2635 /* Perform the standard symbol lookup of NAME in OBJFILE:
2636 1) First search expanded symtabs, and if not found
2637 2) Search the "quick" symtabs (partial or .gdb_index).
2638 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2640 static struct block_symbol
2641 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2642 const char *name
, const domain_enum domain
)
2644 struct block_symbol result
;
2646 if (symbol_lookup_debug
)
2648 fprintf_unfiltered (gdb_stdlog
,
2649 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2650 objfile_debug_name (objfile
),
2651 block_index
== GLOBAL_BLOCK
2652 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2653 name
, domain_name (domain
));
2656 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2658 if (result
.symbol
!= NULL
)
2660 if (symbol_lookup_debug
)
2662 fprintf_unfiltered (gdb_stdlog
,
2663 "lookup_symbol_in_objfile (...) = %s"
2665 host_address_to_string (result
.symbol
));
2670 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2672 if (symbol_lookup_debug
)
2674 fprintf_unfiltered (gdb_stdlog
,
2675 "lookup_symbol_in_objfile (...) = %s%s\n",
2676 result
.symbol
!= NULL
2677 ? host_address_to_string (result
.symbol
)
2679 result
.symbol
!= NULL
? " (via quick fns)" : "");
2687 lookup_static_symbol (const char *name
, const domain_enum domain
)
2689 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2690 struct objfile
*objfile
;
2691 struct block_symbol result
;
2692 struct block_symbol_cache
*bsc
;
2693 struct symbol_cache_slot
*slot
;
2695 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2696 NULL for OBJFILE_CONTEXT. */
2697 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2699 if (result
.symbol
!= NULL
)
2701 if (SYMBOL_LOOKUP_FAILED_P (result
))
2702 return (struct block_symbol
) {NULL
, NULL
};
2706 ALL_OBJFILES (objfile
)
2708 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2709 if (result
.symbol
!= NULL
)
2711 /* Still pass NULL for OBJFILE_CONTEXT here. */
2712 symbol_cache_mark_found (bsc
, slot
, NULL
, result
.symbol
,
2718 /* Still pass NULL for OBJFILE_CONTEXT here. */
2719 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2720 return (struct block_symbol
) {NULL
, NULL
};
2723 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2725 struct global_sym_lookup_data
2727 /* The name of the symbol we are searching for. */
2730 /* The domain to use for our search. */
2733 /* The field where the callback should store the symbol if found.
2734 It should be initialized to {NULL, NULL} before the search is started. */
2735 struct block_symbol result
;
2738 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2739 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2740 OBJFILE. The arguments for the search are passed via CB_DATA,
2741 which in reality is a pointer to struct global_sym_lookup_data. */
2744 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2747 struct global_sym_lookup_data
*data
=
2748 (struct global_sym_lookup_data
*) cb_data
;
2750 gdb_assert (data
->result
.symbol
== NULL
2751 && data
->result
.block
== NULL
);
2753 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2754 data
->name
, data
->domain
);
2756 /* If we found a match, tell the iterator to stop. Otherwise,
2758 return (data
->result
.symbol
!= NULL
);
2764 lookup_global_symbol (const char *name
,
2765 const struct block
*block
,
2766 const domain_enum domain
)
2768 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2769 struct block_symbol result
;
2770 struct objfile
*objfile
;
2771 struct global_sym_lookup_data lookup_data
;
2772 struct block_symbol_cache
*bsc
;
2773 struct symbol_cache_slot
*slot
;
2775 objfile
= lookup_objfile_from_block (block
);
2777 /* First see if we can find the symbol in the cache.
2778 This works because we use the current objfile to qualify the lookup. */
2779 result
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2781 if (result
.symbol
!= NULL
)
2783 if (SYMBOL_LOOKUP_FAILED_P (result
))
2784 return (struct block_symbol
) {NULL
, NULL
};
2788 /* Call library-specific lookup procedure. */
2789 if (objfile
!= NULL
)
2790 result
= solib_global_lookup (objfile
, name
, domain
);
2792 /* If that didn't work go a global search (of global blocks, heh). */
2793 if (result
.symbol
== NULL
)
2795 memset (&lookup_data
, 0, sizeof (lookup_data
));
2796 lookup_data
.name
= name
;
2797 lookup_data
.domain
= domain
;
2798 gdbarch_iterate_over_objfiles_in_search_order
2799 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2800 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2801 result
= lookup_data
.result
;
2804 if (result
.symbol
!= NULL
)
2805 symbol_cache_mark_found (bsc
, slot
, objfile
, result
.symbol
, result
.block
);
2807 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2813 symbol_matches_domain (enum language symbol_language
,
2814 domain_enum symbol_domain
,
2817 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2818 A Java class declaration also defines a typedef for the class.
2819 Similarly, any Ada type declaration implicitly defines a typedef. */
2820 if (symbol_language
== language_cplus
2821 || symbol_language
== language_d
2822 || symbol_language
== language_java
2823 || symbol_language
== language_ada
)
2825 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2826 && symbol_domain
== STRUCT_DOMAIN
)
2829 /* For all other languages, strict match is required. */
2830 return (symbol_domain
== domain
);
2836 lookup_transparent_type (const char *name
)
2838 return current_language
->la_lookup_transparent_type (name
);
2841 /* A helper for basic_lookup_transparent_type that interfaces with the
2842 "quick" symbol table functions. */
2844 static struct type
*
2845 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2848 struct compunit_symtab
*cust
;
2849 const struct blockvector
*bv
;
2850 struct block
*block
;
2855 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2860 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2861 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2862 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2863 block_find_non_opaque_type
, NULL
);
2865 error_in_psymtab_expansion (block_index
, name
, cust
);
2866 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2867 return SYMBOL_TYPE (sym
);
2870 /* Subroutine of basic_lookup_transparent_type to simplify it.
2871 Look up the non-opaque definition of NAME in BLOCK_INDEX of OBJFILE.
2872 BLOCK_INDEX is either GLOBAL_BLOCK or STATIC_BLOCK. */
2874 static struct type
*
2875 basic_lookup_transparent_type_1 (struct objfile
*objfile
, int block_index
,
2878 const struct compunit_symtab
*cust
;
2879 const struct blockvector
*bv
;
2880 const struct block
*block
;
2881 const struct symbol
*sym
;
2883 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2885 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2886 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2887 sym
= block_find_symbol (block
, name
, STRUCT_DOMAIN
,
2888 block_find_non_opaque_type
, NULL
);
2891 gdb_assert (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)));
2892 return SYMBOL_TYPE (sym
);
2899 /* The standard implementation of lookup_transparent_type. This code
2900 was modeled on lookup_symbol -- the parts not relevant to looking
2901 up types were just left out. In particular it's assumed here that
2902 types are available in STRUCT_DOMAIN and only in file-static or
2906 basic_lookup_transparent_type (const char *name
)
2909 struct compunit_symtab
*cust
;
2910 const struct blockvector
*bv
;
2911 struct objfile
*objfile
;
2912 struct block
*block
;
2915 /* Now search all the global symbols. Do the symtab's first, then
2916 check the psymtab's. If a psymtab indicates the existence
2917 of the desired name as a global, then do psymtab-to-symtab
2918 conversion on the fly and return the found symbol. */
2920 ALL_OBJFILES (objfile
)
2922 t
= basic_lookup_transparent_type_1 (objfile
, GLOBAL_BLOCK
, name
);
2927 ALL_OBJFILES (objfile
)
2929 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2934 /* Now search the static file-level symbols.
2935 Not strictly correct, but more useful than an error.
2936 Do the symtab's first, then
2937 check the psymtab's. If a psymtab indicates the existence
2938 of the desired name as a file-level static, then do psymtab-to-symtab
2939 conversion on the fly and return the found symbol. */
2941 ALL_OBJFILES (objfile
)
2943 t
= basic_lookup_transparent_type_1 (objfile
, STATIC_BLOCK
, name
);
2948 ALL_OBJFILES (objfile
)
2950 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2955 return (struct type
*) 0;
2958 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2960 For each symbol that matches, CALLBACK is called. The symbol and
2961 DATA are passed to the callback.
2963 If CALLBACK returns zero, the iteration ends. Otherwise, the
2964 search continues. */
2967 iterate_over_symbols (const struct block
*block
, const char *name
,
2968 const domain_enum domain
,
2969 symbol_found_callback_ftype
*callback
,
2972 struct block_iterator iter
;
2975 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2977 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2978 SYMBOL_DOMAIN (sym
), domain
))
2980 if (!callback (sym
, data
))
2986 /* Find the compunit symtab associated with PC and SECTION.
2987 This will read in debug info as necessary. */
2989 struct compunit_symtab
*
2990 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2992 struct compunit_symtab
*cust
;
2993 struct compunit_symtab
*best_cust
= NULL
;
2994 struct objfile
*objfile
;
2995 CORE_ADDR distance
= 0;
2996 struct bound_minimal_symbol msymbol
;
2998 /* If we know that this is not a text address, return failure. This is
2999 necessary because we loop based on the block's high and low code
3000 addresses, which do not include the data ranges, and because
3001 we call find_pc_sect_psymtab which has a similar restriction based
3002 on the partial_symtab's texthigh and textlow. */
3003 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
3005 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
3006 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
3007 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
3008 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
3009 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
3012 /* Search all symtabs for the one whose file contains our address, and which
3013 is the smallest of all the ones containing the address. This is designed
3014 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
3015 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
3016 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
3018 This happens for native ecoff format, where code from included files
3019 gets its own symtab. The symtab for the included file should have
3020 been read in already via the dependency mechanism.
3021 It might be swifter to create several symtabs with the same name
3022 like xcoff does (I'm not sure).
3024 It also happens for objfiles that have their functions reordered.
3025 For these, the symtab we are looking for is not necessarily read in. */
3027 ALL_COMPUNITS (objfile
, cust
)
3030 const struct blockvector
*bv
;
3032 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3033 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
3035 if (BLOCK_START (b
) <= pc
3036 && BLOCK_END (b
) > pc
3038 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
3040 /* For an objfile that has its functions reordered,
3041 find_pc_psymtab will find the proper partial symbol table
3042 and we simply return its corresponding symtab. */
3043 /* In order to better support objfiles that contain both
3044 stabs and coff debugging info, we continue on if a psymtab
3046 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
3048 struct compunit_symtab
*result
;
3051 = objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
3060 struct block_iterator iter
;
3061 struct symbol
*sym
= NULL
;
3063 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3065 fixup_symbol_section (sym
, objfile
);
3066 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
3071 continue; /* No symbol in this symtab matches
3074 distance
= BLOCK_END (b
) - BLOCK_START (b
);
3079 if (best_cust
!= NULL
)
3082 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
3084 ALL_OBJFILES (objfile
)
3086 struct compunit_symtab
*result
;
3090 result
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
3101 /* Find the compunit symtab associated with PC.
3102 This will read in debug info as necessary.
3103 Backward compatibility, no section. */
3105 struct compunit_symtab
*
3106 find_pc_compunit_symtab (CORE_ADDR pc
)
3108 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
3112 /* Find the source file and line number for a given PC value and SECTION.
3113 Return a structure containing a symtab pointer, a line number,
3114 and a pc range for the entire source line.
3115 The value's .pc field is NOT the specified pc.
3116 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3117 use the line that ends there. Otherwise, in that case, the line
3118 that begins there is used. */
3120 /* The big complication here is that a line may start in one file, and end just
3121 before the start of another file. This usually occurs when you #include
3122 code in the middle of a subroutine. To properly find the end of a line's PC
3123 range, we must search all symtabs associated with this compilation unit, and
3124 find the one whose first PC is closer than that of the next line in this
3127 /* If it's worth the effort, we could be using a binary search. */
3129 struct symtab_and_line
3130 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
3132 struct compunit_symtab
*cust
;
3133 struct symtab
*iter_s
;
3134 struct linetable
*l
;
3137 struct linetable_entry
*item
;
3138 struct symtab_and_line val
;
3139 const struct blockvector
*bv
;
3140 struct bound_minimal_symbol msymbol
;
3142 /* Info on best line seen so far, and where it starts, and its file. */
3144 struct linetable_entry
*best
= NULL
;
3145 CORE_ADDR best_end
= 0;
3146 struct symtab
*best_symtab
= 0;
3148 /* Store here the first line number
3149 of a file which contains the line at the smallest pc after PC.
3150 If we don't find a line whose range contains PC,
3151 we will use a line one less than this,
3152 with a range from the start of that file to the first line's pc. */
3153 struct linetable_entry
*alt
= NULL
;
3155 /* Info on best line seen in this file. */
3157 struct linetable_entry
*prev
;
3159 /* If this pc is not from the current frame,
3160 it is the address of the end of a call instruction.
3161 Quite likely that is the start of the following statement.
3162 But what we want is the statement containing the instruction.
3163 Fudge the pc to make sure we get that. */
3165 init_sal (&val
); /* initialize to zeroes */
3167 val
.pspace
= current_program_space
;
3169 /* It's tempting to assume that, if we can't find debugging info for
3170 any function enclosing PC, that we shouldn't search for line
3171 number info, either. However, GAS can emit line number info for
3172 assembly files --- very helpful when debugging hand-written
3173 assembly code. In such a case, we'd have no debug info for the
3174 function, but we would have line info. */
3179 /* elz: added this because this function returned the wrong
3180 information if the pc belongs to a stub (import/export)
3181 to call a shlib function. This stub would be anywhere between
3182 two functions in the target, and the line info was erroneously
3183 taken to be the one of the line before the pc. */
3185 /* RT: Further explanation:
3187 * We have stubs (trampolines) inserted between procedures.
3189 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3190 * exists in the main image.
3192 * In the minimal symbol table, we have a bunch of symbols
3193 * sorted by start address. The stubs are marked as "trampoline",
3194 * the others appear as text. E.g.:
3196 * Minimal symbol table for main image
3197 * main: code for main (text symbol)
3198 * shr1: stub (trampoline symbol)
3199 * foo: code for foo (text symbol)
3201 * Minimal symbol table for "shr1" image:
3203 * shr1: code for shr1 (text symbol)
3206 * So the code below is trying to detect if we are in the stub
3207 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3208 * and if found, do the symbolization from the real-code address
3209 * rather than the stub address.
3211 * Assumptions being made about the minimal symbol table:
3212 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3213 * if we're really in the trampoline.s If we're beyond it (say
3214 * we're in "foo" in the above example), it'll have a closer
3215 * symbol (the "foo" text symbol for example) and will not
3216 * return the trampoline.
3217 * 2. lookup_minimal_symbol_text() will find a real text symbol
3218 * corresponding to the trampoline, and whose address will
3219 * be different than the trampoline address. I put in a sanity
3220 * check for the address being the same, to avoid an
3221 * infinite recursion.
3223 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3224 if (msymbol
.minsym
!= NULL
)
3225 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3227 struct bound_minimal_symbol mfunsym
3228 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3231 if (mfunsym
.minsym
== NULL
)
3232 /* I eliminated this warning since it is coming out
3233 * in the following situation:
3234 * gdb shmain // test program with shared libraries
3235 * (gdb) break shr1 // function in shared lib
3236 * Warning: In stub for ...
3237 * In the above situation, the shared lib is not loaded yet,
3238 * so of course we can't find the real func/line info,
3239 * but the "break" still works, and the warning is annoying.
3240 * So I commented out the warning. RT */
3241 /* warning ("In stub for %s; unable to find real function/line info",
3242 SYMBOL_LINKAGE_NAME (msymbol)); */
3245 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3246 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3247 /* Avoid infinite recursion */
3248 /* See above comment about why warning is commented out. */
3249 /* warning ("In stub for %s; unable to find real function/line info",
3250 SYMBOL_LINKAGE_NAME (msymbol)); */
3254 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3258 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3261 /* If no symbol information, return previous pc. */
3268 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3270 /* Look at all the symtabs that share this blockvector.
3271 They all have the same apriori range, that we found was right;
3272 but they have different line tables. */
3274 ALL_COMPUNIT_FILETABS (cust
, iter_s
)
3276 /* Find the best line in this symtab. */
3277 l
= SYMTAB_LINETABLE (iter_s
);
3283 /* I think len can be zero if the symtab lacks line numbers
3284 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3285 I'm not sure which, and maybe it depends on the symbol
3291 item
= l
->item
; /* Get first line info. */
3293 /* Is this file's first line closer than the first lines of other files?
3294 If so, record this file, and its first line, as best alternate. */
3295 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3298 for (i
= 0; i
< len
; i
++, item
++)
3300 /* Leave prev pointing to the linetable entry for the last line
3301 that started at or before PC. */
3308 /* At this point, prev points at the line whose start addr is <= pc, and
3309 item points at the next line. If we ran off the end of the linetable
3310 (pc >= start of the last line), then prev == item. If pc < start of
3311 the first line, prev will not be set. */
3313 /* Is this file's best line closer than the best in the other files?
3314 If so, record this file, and its best line, as best so far. Don't
3315 save prev if it represents the end of a function (i.e. line number
3316 0) instead of a real line. */
3318 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3321 best_symtab
= iter_s
;
3323 /* Discard BEST_END if it's before the PC of the current BEST. */
3324 if (best_end
<= best
->pc
)
3328 /* If another line (denoted by ITEM) is in the linetable and its
3329 PC is after BEST's PC, but before the current BEST_END, then
3330 use ITEM's PC as the new best_end. */
3331 if (best
&& i
< len
&& item
->pc
> best
->pc
3332 && (best_end
== 0 || best_end
> item
->pc
))
3333 best_end
= item
->pc
;
3338 /* If we didn't find any line number info, just return zeros.
3339 We used to return alt->line - 1 here, but that could be
3340 anywhere; if we don't have line number info for this PC,
3341 don't make some up. */
3344 else if (best
->line
== 0)
3346 /* If our best fit is in a range of PC's for which no line
3347 number info is available (line number is zero) then we didn't
3348 find any valid line information. */
3353 val
.symtab
= best_symtab
;
3354 val
.line
= best
->line
;
3356 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3361 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3363 val
.section
= section
;
3367 /* Backward compatibility (no section). */
3369 struct symtab_and_line
3370 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3372 struct obj_section
*section
;
3374 section
= find_pc_overlay (pc
);
3375 if (pc_in_unmapped_range (pc
, section
))
3376 pc
= overlay_mapped_address (pc
, section
);
3377 return find_pc_sect_line (pc
, section
, notcurrent
);
3383 find_pc_line_symtab (CORE_ADDR pc
)
3385 struct symtab_and_line sal
;
3387 /* This always passes zero for NOTCURRENT to find_pc_line.
3388 There are currently no callers that ever pass non-zero. */
3389 sal
= find_pc_line (pc
, 0);
3393 /* Find line number LINE in any symtab whose name is the same as
3396 If found, return the symtab that contains the linetable in which it was
3397 found, set *INDEX to the index in the linetable of the best entry
3398 found, and set *EXACT_MATCH nonzero if the value returned is an
3401 If not found, return NULL. */
3404 find_line_symtab (struct symtab
*symtab
, int line
,
3405 int *index
, int *exact_match
)
3407 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3409 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3413 struct linetable
*best_linetable
;
3414 struct symtab
*best_symtab
;
3416 /* First try looking it up in the given symtab. */
3417 best_linetable
= SYMTAB_LINETABLE (symtab
);
3418 best_symtab
= symtab
;
3419 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3420 if (best_index
< 0 || !exact
)
3422 /* Didn't find an exact match. So we better keep looking for
3423 another symtab with the same name. In the case of xcoff,
3424 multiple csects for one source file (produced by IBM's FORTRAN
3425 compiler) produce multiple symtabs (this is unavoidable
3426 assuming csects can be at arbitrary places in memory and that
3427 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3429 /* BEST is the smallest linenumber > LINE so far seen,
3430 or 0 if none has been seen so far.
3431 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3434 struct objfile
*objfile
;
3435 struct compunit_symtab
*cu
;
3438 if (best_index
>= 0)
3439 best
= best_linetable
->item
[best_index
].line
;
3443 ALL_OBJFILES (objfile
)
3446 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
3447 symtab_to_fullname (symtab
));
3450 ALL_FILETABS (objfile
, cu
, s
)
3452 struct linetable
*l
;
3455 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
3457 if (FILENAME_CMP (symtab_to_fullname (symtab
),
3458 symtab_to_fullname (s
)) != 0)
3460 l
= SYMTAB_LINETABLE (s
);
3461 ind
= find_line_common (l
, line
, &exact
, 0);
3471 if (best
== 0 || l
->item
[ind
].line
< best
)
3473 best
= l
->item
[ind
].line
;
3486 *index
= best_index
;
3488 *exact_match
= exact
;
3493 /* Given SYMTAB, returns all the PCs function in the symtab that
3494 exactly match LINE. Returns NULL if there are no exact matches,
3495 but updates BEST_ITEM in this case. */
3498 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3499 struct linetable_entry
**best_item
)
3502 VEC (CORE_ADDR
) *result
= NULL
;
3504 /* First, collect all the PCs that are at this line. */
3510 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3517 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3519 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3525 VEC_safe_push (CORE_ADDR
, result
,
3526 SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3534 /* Set the PC value for a given source file and line number and return true.
3535 Returns zero for invalid line number (and sets the PC to 0).
3536 The source file is specified with a struct symtab. */
3539 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3541 struct linetable
*l
;
3548 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3551 l
= SYMTAB_LINETABLE (symtab
);
3552 *pc
= l
->item
[ind
].pc
;
3559 /* Find the range of pc values in a line.
3560 Store the starting pc of the line into *STARTPTR
3561 and the ending pc (start of next line) into *ENDPTR.
3562 Returns 1 to indicate success.
3563 Returns 0 if could not find the specified line. */
3566 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3569 CORE_ADDR startaddr
;
3570 struct symtab_and_line found_sal
;
3573 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3576 /* This whole function is based on address. For example, if line 10 has
3577 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3578 "info line *0x123" should say the line goes from 0x100 to 0x200
3579 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3580 This also insures that we never give a range like "starts at 0x134
3581 and ends at 0x12c". */
3583 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3584 if (found_sal
.line
!= sal
.line
)
3586 /* The specified line (sal) has zero bytes. */
3587 *startptr
= found_sal
.pc
;
3588 *endptr
= found_sal
.pc
;
3592 *startptr
= found_sal
.pc
;
3593 *endptr
= found_sal
.end
;
3598 /* Given a line table and a line number, return the index into the line
3599 table for the pc of the nearest line whose number is >= the specified one.
3600 Return -1 if none is found. The value is >= 0 if it is an index.
3601 START is the index at which to start searching the line table.
3603 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3606 find_line_common (struct linetable
*l
, int lineno
,
3607 int *exact_match
, int start
)
3612 /* BEST is the smallest linenumber > LINENO so far seen,
3613 or 0 if none has been seen so far.
3614 BEST_INDEX identifies the item for it. */
3616 int best_index
= -1;
3627 for (i
= start
; i
< len
; i
++)
3629 struct linetable_entry
*item
= &(l
->item
[i
]);
3631 if (item
->line
== lineno
)
3633 /* Return the first (lowest address) entry which matches. */
3638 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3645 /* If we got here, we didn't get an exact match. */
3650 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3652 struct symtab_and_line sal
;
3654 sal
= find_pc_line (pc
, 0);
3657 return sal
.symtab
!= 0;
3660 /* Given a function symbol SYM, find the symtab and line for the start
3662 If the argument FUNFIRSTLINE is nonzero, we want the first line
3663 of real code inside the function.
3664 This function should return SALs matching those from minsym_found,
3665 otherwise false multiple-locations breakpoints could be placed. */
3667 struct symtab_and_line
3668 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
3670 struct symtab_and_line sal
;
3671 struct obj_section
*section
;
3673 fixup_symbol_section (sym
, NULL
);
3674 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
);
3675 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)), section
, 0);
3677 if (funfirstline
&& sal
.symtab
!= NULL
3678 && (COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (sal
.symtab
))
3679 || SYMTAB_LANGUAGE (sal
.symtab
) == language_asm
))
3681 struct gdbarch
*gdbarch
= symbol_arch (sym
);
3683 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3684 if (gdbarch_skip_entrypoint_p (gdbarch
))
3685 sal
.pc
= gdbarch_skip_entrypoint (gdbarch
, sal
.pc
);
3689 /* We always should have a line for the function start address.
3690 If we don't, something is odd. Create a plain SAL refering
3691 just the PC and hope that skip_prologue_sal (if requested)
3692 can find a line number for after the prologue. */
3693 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
3696 sal
.pspace
= current_program_space
;
3697 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3698 sal
.section
= section
;
3702 skip_prologue_sal (&sal
);
3707 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3708 address for that function that has an entry in SYMTAB's line info
3709 table. If such an entry cannot be found, return FUNC_ADDR
3713 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3715 CORE_ADDR func_start
, func_end
;
3716 struct linetable
*l
;
3719 /* Give up if this symbol has no lineinfo table. */
3720 l
= SYMTAB_LINETABLE (symtab
);
3724 /* Get the range for the function's PC values, or give up if we
3725 cannot, for some reason. */
3726 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3729 /* Linetable entries are ordered by PC values, see the commentary in
3730 symtab.h where `struct linetable' is defined. Thus, the first
3731 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3732 address we are looking for. */
3733 for (i
= 0; i
< l
->nitems
; i
++)
3735 struct linetable_entry
*item
= &(l
->item
[i
]);
3737 /* Don't use line numbers of zero, they mark special entries in
3738 the table. See the commentary on symtab.h before the
3739 definition of struct linetable. */
3740 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3747 /* Adjust SAL to the first instruction past the function prologue.
3748 If the PC was explicitly specified, the SAL is not changed.
3749 If the line number was explicitly specified, at most the SAL's PC
3750 is updated. If SAL is already past the prologue, then do nothing. */
3753 skip_prologue_sal (struct symtab_and_line
*sal
)
3756 struct symtab_and_line start_sal
;
3757 struct cleanup
*old_chain
;
3758 CORE_ADDR pc
, saved_pc
;
3759 struct obj_section
*section
;
3761 struct objfile
*objfile
;
3762 struct gdbarch
*gdbarch
;
3763 const struct block
*b
, *function_block
;
3764 int force_skip
, skip
;
3766 /* Do not change the SAL if PC was specified explicitly. */
3767 if (sal
->explicit_pc
)
3770 old_chain
= save_current_space_and_thread ();
3771 switch_to_program_space_and_thread (sal
->pspace
);
3773 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3776 fixup_symbol_section (sym
, NULL
);
3778 objfile
= symbol_objfile (sym
);
3779 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3780 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3781 name
= SYMBOL_LINKAGE_NAME (sym
);
3785 struct bound_minimal_symbol msymbol
3786 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3788 if (msymbol
.minsym
== NULL
)
3790 do_cleanups (old_chain
);
3794 objfile
= msymbol
.objfile
;
3795 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3796 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3797 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3800 gdbarch
= get_objfile_arch (objfile
);
3802 /* Process the prologue in two passes. In the first pass try to skip the
3803 prologue (SKIP is true) and verify there is a real need for it (indicated
3804 by FORCE_SKIP). If no such reason was found run a second pass where the
3805 prologue is not skipped (SKIP is false). */
3810 /* Be conservative - allow direct PC (without skipping prologue) only if we
3811 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3812 have to be set by the caller so we use SYM instead. */
3814 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3822 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3823 so that gdbarch_skip_prologue has something unique to work on. */
3824 if (section_is_overlay (section
) && !section_is_mapped (section
))
3825 pc
= overlay_unmapped_address (pc
, section
);
3827 /* Skip "first line" of function (which is actually its prologue). */
3828 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3829 if (gdbarch_skip_entrypoint_p (gdbarch
))
3830 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3832 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
3834 /* For overlays, map pc back into its mapped VMA range. */
3835 pc
= overlay_mapped_address (pc
, section
);
3837 /* Calculate line number. */
3838 start_sal
= find_pc_sect_line (pc
, section
, 0);
3840 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3841 line is still part of the same function. */
3842 if (skip
&& start_sal
.pc
!= pc
3843 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3844 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3845 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3846 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3848 /* First pc of next line */
3850 /* Recalculate the line number (might not be N+1). */
3851 start_sal
= find_pc_sect_line (pc
, section
, 0);
3854 /* On targets with executable formats that don't have a concept of
3855 constructors (ELF with .init has, PE doesn't), gcc emits a call
3856 to `__main' in `main' between the prologue and before user
3858 if (gdbarch_skip_main_prologue_p (gdbarch
)
3859 && name
&& strcmp_iw (name
, "main") == 0)
3861 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3862 /* Recalculate the line number (might not be N+1). */
3863 start_sal
= find_pc_sect_line (pc
, section
, 0);
3867 while (!force_skip
&& skip
--);
3869 /* If we still don't have a valid source line, try to find the first
3870 PC in the lineinfo table that belongs to the same function. This
3871 happens with COFF debug info, which does not seem to have an
3872 entry in lineinfo table for the code after the prologue which has
3873 no direct relation to source. For example, this was found to be
3874 the case with the DJGPP target using "gcc -gcoff" when the
3875 compiler inserted code after the prologue to make sure the stack
3877 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3879 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3880 /* Recalculate the line number. */
3881 start_sal
= find_pc_sect_line (pc
, section
, 0);
3884 do_cleanups (old_chain
);
3886 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3887 forward SAL to the end of the prologue. */
3892 sal
->section
= section
;
3894 /* Unless the explicit_line flag was set, update the SAL line
3895 and symtab to correspond to the modified PC location. */
3896 if (sal
->explicit_line
)
3899 sal
->symtab
= start_sal
.symtab
;
3900 sal
->line
= start_sal
.line
;
3901 sal
->end
= start_sal
.end
;
3903 /* Check if we are now inside an inlined function. If we can,
3904 use the call site of the function instead. */
3905 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3906 function_block
= NULL
;
3909 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3911 else if (BLOCK_FUNCTION (b
) != NULL
)
3913 b
= BLOCK_SUPERBLOCK (b
);
3915 if (function_block
!= NULL
3916 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3918 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3919 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3923 /* Given PC at the function's start address, attempt to find the
3924 prologue end using SAL information. Return zero if the skip fails.
3926 A non-optimized prologue traditionally has one SAL for the function
3927 and a second for the function body. A single line function has
3928 them both pointing at the same line.
3930 An optimized prologue is similar but the prologue may contain
3931 instructions (SALs) from the instruction body. Need to skip those
3932 while not getting into the function body.
3934 The functions end point and an increasing SAL line are used as
3935 indicators of the prologue's endpoint.
3937 This code is based on the function refine_prologue_limit
3941 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3943 struct symtab_and_line prologue_sal
;
3946 const struct block
*bl
;
3948 /* Get an initial range for the function. */
3949 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3950 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3952 prologue_sal
= find_pc_line (start_pc
, 0);
3953 if (prologue_sal
.line
!= 0)
3955 /* For languages other than assembly, treat two consecutive line
3956 entries at the same address as a zero-instruction prologue.
3957 The GNU assembler emits separate line notes for each instruction
3958 in a multi-instruction macro, but compilers generally will not
3960 if (prologue_sal
.symtab
->language
!= language_asm
)
3962 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3965 /* Skip any earlier lines, and any end-of-sequence marker
3966 from a previous function. */
3967 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3968 || linetable
->item
[idx
].line
== 0)
3971 if (idx
+1 < linetable
->nitems
3972 && linetable
->item
[idx
+1].line
!= 0
3973 && linetable
->item
[idx
+1].pc
== start_pc
)
3977 /* If there is only one sal that covers the entire function,
3978 then it is probably a single line function, like
3980 if (prologue_sal
.end
>= end_pc
)
3983 while (prologue_sal
.end
< end_pc
)
3985 struct symtab_and_line sal
;
3987 sal
= find_pc_line (prologue_sal
.end
, 0);
3990 /* Assume that a consecutive SAL for the same (or larger)
3991 line mark the prologue -> body transition. */
3992 if (sal
.line
>= prologue_sal
.line
)
3994 /* Likewise if we are in a different symtab altogether
3995 (e.g. within a file included via #include). */
3996 if (sal
.symtab
!= prologue_sal
.symtab
)
3999 /* The line number is smaller. Check that it's from the
4000 same function, not something inlined. If it's inlined,
4001 then there is no point comparing the line numbers. */
4002 bl
= block_for_pc (prologue_sal
.end
);
4005 if (block_inlined_p (bl
))
4007 if (BLOCK_FUNCTION (bl
))
4012 bl
= BLOCK_SUPERBLOCK (bl
);
4017 /* The case in which compiler's optimizer/scheduler has
4018 moved instructions into the prologue. We look ahead in
4019 the function looking for address ranges whose
4020 corresponding line number is less the first one that we
4021 found for the function. This is more conservative then
4022 refine_prologue_limit which scans a large number of SALs
4023 looking for any in the prologue. */
4028 if (prologue_sal
.end
< end_pc
)
4029 /* Return the end of this line, or zero if we could not find a
4031 return prologue_sal
.end
;
4033 /* Don't return END_PC, which is past the end of the function. */
4034 return prologue_sal
.pc
;
4037 /* If P is of the form "operator[ \t]+..." where `...' is
4038 some legitimate operator text, return a pointer to the
4039 beginning of the substring of the operator text.
4040 Otherwise, return "". */
4043 operator_chars (const char *p
, const char **end
)
4046 if (!startswith (p
, "operator"))
4050 /* Don't get faked out by `operator' being part of a longer
4052 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
4055 /* Allow some whitespace between `operator' and the operator symbol. */
4056 while (*p
== ' ' || *p
== '\t')
4059 /* Recognize 'operator TYPENAME'. */
4061 if (isalpha (*p
) || *p
== '_' || *p
== '$')
4063 const char *q
= p
+ 1;
4065 while (isalnum (*q
) || *q
== '_' || *q
== '$')
4074 case '\\': /* regexp quoting */
4077 if (p
[2] == '=') /* 'operator\*=' */
4079 else /* 'operator\*' */
4083 else if (p
[1] == '[')
4086 error (_("mismatched quoting on brackets, "
4087 "try 'operator\\[\\]'"));
4088 else if (p
[2] == '\\' && p
[3] == ']')
4090 *end
= p
+ 4; /* 'operator\[\]' */
4094 error (_("nothing is allowed between '[' and ']'"));
4098 /* Gratuitous qoute: skip it and move on. */
4120 if (p
[0] == '-' && p
[1] == '>')
4122 /* Struct pointer member operator 'operator->'. */
4125 *end
= p
+ 3; /* 'operator->*' */
4128 else if (p
[2] == '\\')
4130 *end
= p
+ 4; /* Hopefully 'operator->\*' */
4135 *end
= p
+ 2; /* 'operator->' */
4139 if (p
[1] == '=' || p
[1] == p
[0])
4150 error (_("`operator ()' must be specified "
4151 "without whitespace in `()'"));
4156 error (_("`operator ?:' must be specified "
4157 "without whitespace in `?:'"));
4162 error (_("`operator []' must be specified "
4163 "without whitespace in `[]'"));
4167 error (_("`operator %s' not supported"), p
);
4176 /* Cache to watch for file names already seen by filename_seen. */
4178 struct filename_seen_cache
4180 /* Table of files seen so far. */
4182 /* Initial size of the table. It automagically grows from here. */
4183 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
4186 /* filename_seen_cache constructor. */
4188 static struct filename_seen_cache
*
4189 create_filename_seen_cache (void)
4191 struct filename_seen_cache
*cache
= XNEW (struct filename_seen_cache
);
4193 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
4194 filename_hash
, filename_eq
,
4195 NULL
, xcalloc
, xfree
);
4200 /* Empty the cache, but do not delete it. */
4203 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
4205 htab_empty (cache
->tab
);
4208 /* filename_seen_cache destructor.
4209 This takes a void * argument as it is generally used as a cleanup. */
4212 delete_filename_seen_cache (void *ptr
)
4214 struct filename_seen_cache
*cache
= (struct filename_seen_cache
*) ptr
;
4216 htab_delete (cache
->tab
);
4220 /* If FILE is not already in the table of files in CACHE, return zero;
4221 otherwise return non-zero. Optionally add FILE to the table if ADD
4224 NOTE: We don't manage space for FILE, we assume FILE lives as long
4225 as the caller needs. */
4228 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
4232 /* Is FILE in tab? */
4233 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
4237 /* No; maybe add it to tab. */
4239 *slot
= (char *) file
;
4244 /* Data structure to maintain printing state for output_source_filename. */
4246 struct output_source_filename_data
4248 /* Cache of what we've seen so far. */
4249 struct filename_seen_cache
*filename_seen_cache
;
4251 /* Flag of whether we're printing the first one. */
4255 /* Slave routine for sources_info. Force line breaks at ,'s.
4256 NAME is the name to print.
4257 DATA contains the state for printing and watching for duplicates. */
4260 output_source_filename (const char *name
,
4261 struct output_source_filename_data
*data
)
4263 /* Since a single source file can result in several partial symbol
4264 tables, we need to avoid printing it more than once. Note: if
4265 some of the psymtabs are read in and some are not, it gets
4266 printed both under "Source files for which symbols have been
4267 read" and "Source files for which symbols will be read in on
4268 demand". I consider this a reasonable way to deal with the
4269 situation. I'm not sure whether this can also happen for
4270 symtabs; it doesn't hurt to check. */
4272 /* Was NAME already seen? */
4273 if (filename_seen (data
->filename_seen_cache
, name
, 1))
4275 /* Yes; don't print it again. */
4279 /* No; print it and reset *FIRST. */
4281 printf_filtered (", ");
4285 fputs_filtered (name
, gdb_stdout
);
4288 /* A callback for map_partial_symbol_filenames. */
4291 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4294 output_source_filename (fullname
? fullname
: filename
,
4295 (struct output_source_filename_data
*) data
);
4299 sources_info (char *ignore
, int from_tty
)
4301 struct compunit_symtab
*cu
;
4303 struct objfile
*objfile
;
4304 struct output_source_filename_data data
;
4305 struct cleanup
*cleanups
;
4307 if (!have_full_symbols () && !have_partial_symbols ())
4309 error (_("No symbol table is loaded. Use the \"file\" command."));
4312 data
.filename_seen_cache
= create_filename_seen_cache ();
4313 cleanups
= make_cleanup (delete_filename_seen_cache
,
4314 data
.filename_seen_cache
);
4316 printf_filtered ("Source files for which symbols have been read in:\n\n");
4319 ALL_FILETABS (objfile
, cu
, s
)
4321 const char *fullname
= symtab_to_fullname (s
);
4323 output_source_filename (fullname
, &data
);
4325 printf_filtered ("\n\n");
4327 printf_filtered ("Source files for which symbols "
4328 "will be read in on demand:\n\n");
4330 clear_filename_seen_cache (data
.filename_seen_cache
);
4332 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4333 1 /*need_fullname*/);
4334 printf_filtered ("\n");
4336 do_cleanups (cleanups
);
4339 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4340 non-zero compare only lbasename of FILES. */
4343 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4347 if (file
!= NULL
&& nfiles
!= 0)
4349 for (i
= 0; i
< nfiles
; i
++)
4351 if (compare_filenames_for_search (file
, (basenames
4352 ? lbasename (files
[i
])
4357 else if (nfiles
== 0)
4362 /* Free any memory associated with a search. */
4365 free_search_symbols (struct symbol_search
*symbols
)
4367 struct symbol_search
*p
;
4368 struct symbol_search
*next
;
4370 for (p
= symbols
; p
!= NULL
; p
= next
)
4378 do_free_search_symbols_cleanup (void *symbolsp
)
4380 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
4382 free_search_symbols (symbols
);
4386 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
4388 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
4391 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4392 sort symbols, not minimal symbols. */
4395 compare_search_syms (const void *sa
, const void *sb
)
4397 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
4398 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
4401 c
= FILENAME_CMP (symbol_symtab (sym_a
->symbol
)->filename
,
4402 symbol_symtab (sym_b
->symbol
)->filename
);
4406 if (sym_a
->block
!= sym_b
->block
)
4407 return sym_a
->block
- sym_b
->block
;
4409 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
4410 SYMBOL_PRINT_NAME (sym_b
->symbol
));
4413 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
4414 The duplicates are freed, and the new list is returned in
4415 *NEW_HEAD, *NEW_TAIL. */
4418 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
4419 struct symbol_search
**new_head
,
4420 struct symbol_search
**new_tail
)
4422 struct symbol_search
**symbols
, *symp
, *old_next
;
4425 gdb_assert (found
!= NULL
&& nfound
> 0);
4427 /* Build an array out of the list so we can easily sort them. */
4428 symbols
= XNEWVEC (struct symbol_search
*, nfound
);
4431 for (i
= 0; i
< nfound
; i
++)
4433 gdb_assert (symp
!= NULL
);
4434 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
4438 gdb_assert (symp
== NULL
);
4440 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
4441 compare_search_syms
);
4443 /* Collapse out the dups. */
4444 for (i
= 1, j
= 1; i
< nfound
; ++i
)
4446 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
4447 symbols
[j
++] = symbols
[i
];
4452 symbols
[j
- 1]->next
= NULL
;
4454 /* Rebuild the linked list. */
4455 for (i
= 0; i
< nunique
- 1; i
++)
4456 symbols
[i
]->next
= symbols
[i
+ 1];
4457 symbols
[nunique
- 1]->next
= NULL
;
4459 *new_head
= symbols
[0];
4460 *new_tail
= symbols
[nunique
- 1];
4464 /* An object of this type is passed as the user_data to the
4465 expand_symtabs_matching method. */
4466 struct search_symbols_data
4471 /* It is true if PREG contains valid data, false otherwise. */
4472 unsigned preg_p
: 1;
4476 /* A callback for expand_symtabs_matching. */
4479 search_symbols_file_matches (const char *filename
, void *user_data
,
4482 struct search_symbols_data
*data
= (struct search_symbols_data
*) user_data
;
4484 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
4487 /* A callback for expand_symtabs_matching. */
4490 search_symbols_name_matches (const char *symname
, void *user_data
)
4492 struct search_symbols_data
*data
= (struct search_symbols_data
*) user_data
;
4494 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
4497 /* Search the symbol table for matches to the regular expression REGEXP,
4498 returning the results in *MATCHES.
4500 Only symbols of KIND are searched:
4501 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4502 and constants (enums)
4503 FUNCTIONS_DOMAIN - search all functions
4504 TYPES_DOMAIN - search all type names
4505 ALL_DOMAIN - an internal error for this function
4507 free_search_symbols should be called when *MATCHES is no longer needed.
4509 Within each file the results are sorted locally; each symtab's global and
4510 static blocks are separately alphabetized.
4511 Duplicate entries are removed. */
4514 search_symbols (const char *regexp
, enum search_domain kind
,
4515 int nfiles
, const char *files
[],
4516 struct symbol_search
**matches
)
4518 struct compunit_symtab
*cust
;
4519 const struct blockvector
*bv
;
4522 struct block_iterator iter
;
4524 struct objfile
*objfile
;
4525 struct minimal_symbol
*msymbol
;
4527 static const enum minimal_symbol_type types
[]
4528 = {mst_data
, mst_text
, mst_abs
};
4529 static const enum minimal_symbol_type types2
[]
4530 = {mst_bss
, mst_file_text
, mst_abs
};
4531 static const enum minimal_symbol_type types3
[]
4532 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4533 static const enum minimal_symbol_type types4
[]
4534 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4535 enum minimal_symbol_type ourtype
;
4536 enum minimal_symbol_type ourtype2
;
4537 enum minimal_symbol_type ourtype3
;
4538 enum minimal_symbol_type ourtype4
;
4539 struct symbol_search
*found
;
4540 struct symbol_search
*tail
;
4541 struct search_symbols_data datum
;
4544 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
4545 CLEANUP_CHAIN is freed only in the case of an error. */
4546 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
4547 struct cleanup
*retval_chain
;
4549 gdb_assert (kind
<= TYPES_DOMAIN
);
4551 ourtype
= types
[kind
];
4552 ourtype2
= types2
[kind
];
4553 ourtype3
= types3
[kind
];
4554 ourtype4
= types4
[kind
];
4561 /* Make sure spacing is right for C++ operators.
4562 This is just a courtesy to make the matching less sensitive
4563 to how many spaces the user leaves between 'operator'
4564 and <TYPENAME> or <OPERATOR>. */
4566 const char *opname
= operator_chars (regexp
, &opend
);
4571 int fix
= -1; /* -1 means ok; otherwise number of
4574 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4576 /* There should 1 space between 'operator' and 'TYPENAME'. */
4577 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4582 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4583 if (opname
[-1] == ' ')
4586 /* If wrong number of spaces, fix it. */
4589 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4591 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4596 errcode
= regcomp (&datum
.preg
, regexp
,
4597 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4601 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
4603 make_cleanup (xfree
, err
);
4604 error (_("Invalid regexp (%s): %s"), err
, regexp
);
4607 make_regfree_cleanup (&datum
.preg
);
4610 /* Search through the partial symtabs *first* for all symbols
4611 matching the regexp. That way we don't have to reproduce all of
4612 the machinery below. */
4614 datum
.nfiles
= nfiles
;
4615 datum
.files
= files
;
4616 expand_symtabs_matching ((nfiles
== 0
4618 : search_symbols_file_matches
),
4619 search_symbols_name_matches
,
4620 NULL
, kind
, &datum
);
4622 /* Here, we search through the minimal symbol tables for functions
4623 and variables that match, and force their symbols to be read.
4624 This is in particular necessary for demangled variable names,
4625 which are no longer put into the partial symbol tables.
4626 The symbol will then be found during the scan of symtabs below.
4628 For functions, find_pc_symtab should succeed if we have debug info
4629 for the function, for variables we have to call
4630 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4632 If the lookup fails, set found_misc so that we will rescan to print
4633 any matching symbols without debug info.
4634 We only search the objfile the msymbol came from, we no longer search
4635 all objfiles. In large programs (1000s of shared libs) searching all
4636 objfiles is not worth the pain. */
4638 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4640 ALL_MSYMBOLS (objfile
, msymbol
)
4644 if (msymbol
->created_by_gdb
)
4647 if (MSYMBOL_TYPE (msymbol
) == ourtype
4648 || MSYMBOL_TYPE (msymbol
) == ourtype2
4649 || MSYMBOL_TYPE (msymbol
) == ourtype3
4650 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4653 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4656 /* Note: An important side-effect of these lookup functions
4657 is to expand the symbol table if msymbol is found, for the
4658 benefit of the next loop on ALL_COMPUNITS. */
4659 if (kind
== FUNCTIONS_DOMAIN
4660 ? (find_pc_compunit_symtab
4661 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
)
4662 : (lookup_symbol_in_objfile_from_linkage_name
4663 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4674 retval_chain
= make_cleanup_free_search_symbols (&found
);
4676 ALL_COMPUNITS (objfile
, cust
)
4678 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4679 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4681 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4682 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4684 struct symtab
*real_symtab
= symbol_symtab (sym
);
4688 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
4689 a substring of symtab_to_fullname as it may contain "./" etc. */
4690 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4691 || ((basenames_may_differ
4692 || file_matches (lbasename (real_symtab
->filename
),
4694 && file_matches (symtab_to_fullname (real_symtab
),
4697 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
4699 && ((kind
== VARIABLES_DOMAIN
4700 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4701 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4702 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4703 /* LOC_CONST can be used for more than just enums,
4704 e.g., c++ static const members.
4705 We only want to skip enums here. */
4706 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4707 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4708 == TYPE_CODE_ENUM
)))
4709 || (kind
== FUNCTIONS_DOMAIN
4710 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4711 || (kind
== TYPES_DOMAIN
4712 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4715 struct symbol_search
*psr
= XCNEW (struct symbol_search
);
4733 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
4734 /* Note: nfound is no longer useful beyond this point. */
4737 /* If there are no eyes, avoid all contact. I mean, if there are
4738 no debug symbols, then add matching minsyms. */
4740 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4742 ALL_MSYMBOLS (objfile
, msymbol
)
4746 if (msymbol
->created_by_gdb
)
4749 if (MSYMBOL_TYPE (msymbol
) == ourtype
4750 || MSYMBOL_TYPE (msymbol
) == ourtype2
4751 || MSYMBOL_TYPE (msymbol
) == ourtype3
4752 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4755 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4758 /* For functions we can do a quick check of whether the
4759 symbol might be found via find_pc_symtab. */
4760 if (kind
!= FUNCTIONS_DOMAIN
4761 || (find_pc_compunit_symtab
4762 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
))
4764 if (lookup_symbol_in_objfile_from_linkage_name
4765 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4769 struct symbol_search
*psr
= XNEW (struct symbol_search
);
4771 psr
->msymbol
.minsym
= msymbol
;
4772 psr
->msymbol
.objfile
= objfile
;
4787 discard_cleanups (retval_chain
);
4788 do_cleanups (old_chain
);
4792 /* Helper function for symtab_symbol_info, this function uses
4793 the data returned from search_symbols() to print information
4794 regarding the match to gdb_stdout. */
4797 print_symbol_info (enum search_domain kind
,
4799 int block
, const char *last
)
4801 struct symtab
*s
= symbol_symtab (sym
);
4802 const char *s_filename
= symtab_to_filename_for_display (s
);
4804 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
4806 fputs_filtered ("\nFile ", gdb_stdout
);
4807 fputs_filtered (s_filename
, gdb_stdout
);
4808 fputs_filtered (":\n", gdb_stdout
);
4811 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4812 printf_filtered ("static ");
4814 /* Typedef that is not a C++ class. */
4815 if (kind
== TYPES_DOMAIN
4816 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4817 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4818 /* variable, func, or typedef-that-is-c++-class. */
4819 else if (kind
< TYPES_DOMAIN
4820 || (kind
== TYPES_DOMAIN
4821 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4823 type_print (SYMBOL_TYPE (sym
),
4824 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4825 ? "" : SYMBOL_PRINT_NAME (sym
)),
4828 printf_filtered (";\n");
4832 /* This help function for symtab_symbol_info() prints information
4833 for non-debugging symbols to gdb_stdout. */
4836 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4838 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4841 if (gdbarch_addr_bit (gdbarch
) <= 32)
4842 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4843 & (CORE_ADDR
) 0xffffffff,
4846 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4848 printf_filtered ("%s %s\n",
4849 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4852 /* This is the guts of the commands "info functions", "info types", and
4853 "info variables". It calls search_symbols to find all matches and then
4854 print_[m]symbol_info to print out some useful information about the
4858 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4860 static const char * const classnames
[] =
4861 {"variable", "function", "type"};
4862 struct symbol_search
*symbols
;
4863 struct symbol_search
*p
;
4864 struct cleanup
*old_chain
;
4865 const char *last_filename
= NULL
;
4868 gdb_assert (kind
<= TYPES_DOMAIN
);
4870 /* Must make sure that if we're interrupted, symbols gets freed. */
4871 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4872 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4875 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4876 classnames
[kind
], regexp
);
4878 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4880 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4884 if (p
->msymbol
.minsym
!= NULL
)
4888 printf_filtered (_("\nNon-debugging symbols:\n"));
4891 print_msymbol_info (p
->msymbol
);
4895 print_symbol_info (kind
,
4900 = symtab_to_filename_for_display (symbol_symtab (p
->symbol
));
4904 do_cleanups (old_chain
);
4908 variables_info (char *regexp
, int from_tty
)
4910 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4914 functions_info (char *regexp
, int from_tty
)
4916 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4921 types_info (char *regexp
, int from_tty
)
4923 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4926 /* Breakpoint all functions matching regular expression. */
4929 rbreak_command_wrapper (char *regexp
, int from_tty
)
4931 rbreak_command (regexp
, from_tty
);
4934 /* A cleanup function that calls end_rbreak_breakpoints. */
4937 do_end_rbreak_breakpoints (void *ignore
)
4939 end_rbreak_breakpoints ();
4943 rbreak_command (char *regexp
, int from_tty
)
4945 struct symbol_search
*ss
;
4946 struct symbol_search
*p
;
4947 struct cleanup
*old_chain
;
4948 char *string
= NULL
;
4950 const char **files
= NULL
;
4951 const char *file_name
;
4956 char *colon
= strchr (regexp
, ':');
4958 if (colon
&& *(colon
+ 1) != ':')
4963 colon_index
= colon
- regexp
;
4964 local_name
= (char *) alloca (colon_index
+ 1);
4965 memcpy (local_name
, regexp
, colon_index
);
4966 local_name
[colon_index
--] = 0;
4967 while (isspace (local_name
[colon_index
]))
4968 local_name
[colon_index
--] = 0;
4969 file_name
= local_name
;
4972 regexp
= skip_spaces (colon
+ 1);
4976 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4977 old_chain
= make_cleanup_free_search_symbols (&ss
);
4978 make_cleanup (free_current_contents
, &string
);
4980 start_rbreak_breakpoints ();
4981 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4982 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4984 if (p
->msymbol
.minsym
== NULL
)
4986 struct symtab
*symtab
= symbol_symtab (p
->symbol
);
4987 const char *fullname
= symtab_to_fullname (symtab
);
4989 int newlen
= (strlen (fullname
)
4990 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4995 string
= (char *) xrealloc (string
, newlen
);
4998 strcpy (string
, fullname
);
4999 strcat (string
, ":'");
5000 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
5001 strcat (string
, "'");
5002 break_command (string
, from_tty
);
5003 print_symbol_info (FUNCTIONS_DOMAIN
,
5006 symtab_to_filename_for_display (symtab
));
5010 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
5014 string
= (char *) xrealloc (string
, newlen
);
5017 strcpy (string
, "'");
5018 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
5019 strcat (string
, "'");
5021 break_command (string
, from_tty
);
5022 printf_filtered ("<function, no debug info> %s;\n",
5023 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
5027 do_cleanups (old_chain
);
5031 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
5033 Either sym_text[sym_text_len] != '(' and then we search for any
5034 symbol starting with SYM_TEXT text.
5036 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
5037 be terminated at that point. Partial symbol tables do not have parameters
5041 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
5043 int (*ncmp
) (const char *, const char *, size_t);
5045 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
5047 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
5050 if (sym_text
[sym_text_len
] == '(')
5052 /* User searches for `name(someth...'. Require NAME to be terminated.
5053 Normally psymtabs and gdbindex have no parameter types so '\0' will be
5054 present but accept even parameters presence. In this case this
5055 function is in fact strcmp_iw but whitespace skipping is not supported
5056 for tab completion. */
5058 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
5065 /* Free any memory associated with a completion list. */
5068 free_completion_list (VEC (char_ptr
) **list_ptr
)
5073 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
5075 VEC_free (char_ptr
, *list_ptr
);
5078 /* Callback for make_cleanup. */
5081 do_free_completion_list (void *list
)
5083 free_completion_list ((VEC (char_ptr
) **) list
);
5086 /* Helper routine for make_symbol_completion_list. */
5088 static VEC (char_ptr
) *return_val
;
5090 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
5091 completion_list_add_name \
5092 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
5094 #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
5095 completion_list_add_name \
5096 (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
5098 /* Tracker for how many unique completions have been generated. Used
5099 to terminate completion list generation early if the list has grown
5100 to a size so large as to be useless. This helps avoid GDB seeming
5101 to lock up in the event the user requests to complete on something
5102 vague that necessitates the time consuming expansion of many symbol
5105 static completion_tracker_t completion_tracker
;
5107 /* Test to see if the symbol specified by SYMNAME (which is already
5108 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
5109 characters. If so, add it to the current completion list. */
5112 completion_list_add_name (const char *symname
,
5113 const char *sym_text
, int sym_text_len
,
5114 const char *text
, const char *word
)
5116 /* Clip symbols that cannot match. */
5117 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
5120 /* We have a match for a completion, so add SYMNAME to the current list
5121 of matches. Note that the name is moved to freshly malloc'd space. */
5125 enum maybe_add_completion_enum add_status
;
5127 if (word
== sym_text
)
5129 newobj
= (char *) xmalloc (strlen (symname
) + 5);
5130 strcpy (newobj
, symname
);
5132 else if (word
> sym_text
)
5134 /* Return some portion of symname. */
5135 newobj
= (char *) xmalloc (strlen (symname
) + 5);
5136 strcpy (newobj
, symname
+ (word
- sym_text
));
5140 /* Return some of SYM_TEXT plus symname. */
5141 newobj
= (char *) xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
5142 strncpy (newobj
, word
, sym_text
- word
);
5143 newobj
[sym_text
- word
] = '\0';
5144 strcat (newobj
, symname
);
5147 add_status
= maybe_add_completion (completion_tracker
, newobj
);
5151 case MAYBE_ADD_COMPLETION_OK
:
5152 VEC_safe_push (char_ptr
, return_val
, newobj
);
5154 case MAYBE_ADD_COMPLETION_OK_MAX_REACHED
:
5155 VEC_safe_push (char_ptr
, return_val
, newobj
);
5156 throw_max_completions_reached_error ();
5157 case MAYBE_ADD_COMPLETION_MAX_REACHED
:
5159 throw_max_completions_reached_error ();
5160 case MAYBE_ADD_COMPLETION_DUPLICATE
:
5167 /* ObjC: In case we are completing on a selector, look as the msymbol
5168 again and feed all the selectors into the mill. */
5171 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
5172 const char *sym_text
, int sym_text_len
,
5173 const char *text
, const char *word
)
5175 static char *tmp
= NULL
;
5176 static unsigned int tmplen
= 0;
5178 const char *method
, *category
, *selector
;
5181 method
= MSYMBOL_NATURAL_NAME (msymbol
);
5183 /* Is it a method? */
5184 if ((method
[0] != '-') && (method
[0] != '+'))
5187 if (sym_text
[0] == '[')
5188 /* Complete on shortened method method. */
5189 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
5191 while ((strlen (method
) + 1) >= tmplen
)
5197 tmp
= (char *) xrealloc (tmp
, tmplen
);
5199 selector
= strchr (method
, ' ');
5200 if (selector
!= NULL
)
5203 category
= strchr (method
, '(');
5205 if ((category
!= NULL
) && (selector
!= NULL
))
5207 memcpy (tmp
, method
, (category
- method
));
5208 tmp
[category
- method
] = ' ';
5209 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
5210 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5211 if (sym_text
[0] == '[')
5212 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
5215 if (selector
!= NULL
)
5217 /* Complete on selector only. */
5218 strcpy (tmp
, selector
);
5219 tmp2
= strchr (tmp
, ']');
5223 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5227 /* Break the non-quoted text based on the characters which are in
5228 symbols. FIXME: This should probably be language-specific. */
5231 language_search_unquoted_string (const char *text
, const char *p
)
5233 for (; p
> text
; --p
)
5235 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5239 if ((current_language
->la_language
== language_objc
))
5241 if (p
[-1] == ':') /* Might be part of a method name. */
5243 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5244 p
-= 2; /* Beginning of a method name. */
5245 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5246 { /* Might be part of a method name. */
5249 /* Seeing a ' ' or a '(' is not conclusive evidence
5250 that we are in the middle of a method name. However,
5251 finding "-[" or "+[" should be pretty un-ambiguous.
5252 Unfortunately we have to find it now to decide. */
5255 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5256 t
[-1] == ' ' || t
[-1] == ':' ||
5257 t
[-1] == '(' || t
[-1] == ')')
5262 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5263 p
= t
- 2; /* Method name detected. */
5264 /* Else we leave with p unchanged. */
5274 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
5275 int sym_text_len
, const char *text
,
5278 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5280 struct type
*t
= SYMBOL_TYPE (sym
);
5281 enum type_code c
= TYPE_CODE (t
);
5284 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5285 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5286 if (TYPE_FIELD_NAME (t
, j
))
5287 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
5288 sym_text
, sym_text_len
, text
, word
);
5292 /* Type of the user_data argument passed to add_macro_name,
5293 symbol_completion_matcher and symtab_expansion_callback. */
5295 struct add_name_data
5297 /* Arguments required by completion_list_add_name. */
5298 const char *sym_text
;
5303 /* Extra argument required for add_symtab_completions. */
5304 enum type_code code
;
5307 /* A callback used with macro_for_each and macro_for_each_in_scope.
5308 This adds a macro's name to the current completion list. */
5311 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
5312 struct macro_source_file
*ignore2
, int ignore3
,
5315 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5317 completion_list_add_name (name
,
5318 datum
->sym_text
, datum
->sym_text_len
,
5319 datum
->text
, datum
->word
);
5322 /* A callback for expand_symtabs_matching. */
5325 symbol_completion_matcher (const char *name
, void *user_data
)
5327 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5329 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
5332 /* Add matching symbols from SYMTAB to the current completion list. */
5335 add_symtab_completions (struct compunit_symtab
*cust
,
5336 const char *sym_text
, int sym_text_len
,
5337 const char *text
, const char *word
,
5338 enum type_code code
)
5341 const struct block
*b
;
5342 struct block_iterator iter
;
5345 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5348 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5349 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5351 if (code
== TYPE_CODE_UNDEF
5352 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5353 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5354 COMPLETION_LIST_ADD_SYMBOL (sym
,
5355 sym_text
, sym_text_len
,
5361 /* Callback to add completions to the current list when symbol tables
5362 are expanded during completion list generation. */
5365 symtab_expansion_callback (struct compunit_symtab
*symtab
,
5368 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5370 add_symtab_completions (symtab
,
5371 datum
->sym_text
, datum
->sym_text_len
,
5372 datum
->text
, datum
->word
,
5377 default_make_symbol_completion_list_break_on_1 (const char *text
,
5379 const char *break_on
,
5380 enum type_code code
)
5382 /* Problem: All of the symbols have to be copied because readline
5383 frees them. I'm not going to worry about this; hopefully there
5384 won't be that many. */
5387 struct compunit_symtab
*cust
;
5388 struct minimal_symbol
*msymbol
;
5389 struct objfile
*objfile
;
5390 const struct block
*b
;
5391 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5392 struct block_iterator iter
;
5393 /* The symbol we are completing on. Points in same buffer as text. */
5394 const char *sym_text
;
5395 /* Length of sym_text. */
5397 struct add_name_data datum
;
5398 struct cleanup
*cleanups
;
5400 /* Now look for the symbol we are supposed to complete on. */
5404 const char *quote_pos
= NULL
;
5406 /* First see if this is a quoted string. */
5408 for (p
= text
; *p
!= '\0'; ++p
)
5410 if (quote_found
!= '\0')
5412 if (*p
== quote_found
)
5413 /* Found close quote. */
5415 else if (*p
== '\\' && p
[1] == quote_found
)
5416 /* A backslash followed by the quote character
5417 doesn't end the string. */
5420 else if (*p
== '\'' || *p
== '"')
5426 if (quote_found
== '\'')
5427 /* A string within single quotes can be a symbol, so complete on it. */
5428 sym_text
= quote_pos
+ 1;
5429 else if (quote_found
== '"')
5430 /* A double-quoted string is never a symbol, nor does it make sense
5431 to complete it any other way. */
5437 /* It is not a quoted string. Break it based on the characters
5438 which are in symbols. */
5441 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5442 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5451 sym_text_len
= strlen (sym_text
);
5453 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
5455 if (current_language
->la_language
== language_cplus
5456 || current_language
->la_language
== language_java
5457 || current_language
->la_language
== language_fortran
)
5459 /* These languages may have parameters entered by user but they are never
5460 present in the partial symbol tables. */
5462 const char *cs
= (const char *) memchr (sym_text
, '(', sym_text_len
);
5465 sym_text_len
= cs
- sym_text
;
5467 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
5469 completion_tracker
= new_completion_tracker ();
5470 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5472 datum
.sym_text
= sym_text
;
5473 datum
.sym_text_len
= sym_text_len
;
5478 /* At this point scan through the misc symbol vectors and add each
5479 symbol you find to the list. Eventually we want to ignore
5480 anything that isn't a text symbol (everything else will be
5481 handled by the psymtab code below). */
5483 if (code
== TYPE_CODE_UNDEF
)
5485 ALL_MSYMBOLS (objfile
, msymbol
)
5488 MCOMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
5491 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
5496 /* Add completions for all currently loaded symbol tables. */
5497 ALL_COMPUNITS (objfile
, cust
)
5498 add_symtab_completions (cust
, sym_text
, sym_text_len
, text
, word
,
5501 /* Look through the partial symtabs for all symbols which begin
5502 by matching SYM_TEXT. Expand all CUs that you find to the list.
5503 symtab_expansion_callback is called for each expanded symtab,
5504 causing those symtab's completions to be added to the list too. */
5505 expand_symtabs_matching (NULL
, symbol_completion_matcher
,
5506 symtab_expansion_callback
, ALL_DOMAIN
,
5509 /* Search upwards from currently selected frame (so that we can
5510 complete on local vars). Also catch fields of types defined in
5511 this places which match our text string. Only complete on types
5512 visible from current context. */
5514 b
= get_selected_block (0);
5515 surrounding_static_block
= block_static_block (b
);
5516 surrounding_global_block
= block_global_block (b
);
5517 if (surrounding_static_block
!= NULL
)
5518 while (b
!= surrounding_static_block
)
5522 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5524 if (code
== TYPE_CODE_UNDEF
)
5526 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5528 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
5531 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5532 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5533 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5537 /* Stop when we encounter an enclosing function. Do not stop for
5538 non-inlined functions - the locals of the enclosing function
5539 are in scope for a nested function. */
5540 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5542 b
= BLOCK_SUPERBLOCK (b
);
5545 /* Add fields from the file's types; symbols will be added below. */
5547 if (code
== TYPE_CODE_UNDEF
)
5549 if (surrounding_static_block
!= NULL
)
5550 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5551 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5553 if (surrounding_global_block
!= NULL
)
5554 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5555 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5558 /* Skip macros if we are completing a struct tag -- arguable but
5559 usually what is expected. */
5560 if (current_language
->la_macro_expansion
== macro_expansion_c
5561 && code
== TYPE_CODE_UNDEF
)
5563 struct macro_scope
*scope
;
5565 /* Add any macros visible in the default scope. Note that this
5566 may yield the occasional wrong result, because an expression
5567 might be evaluated in a scope other than the default. For
5568 example, if the user types "break file:line if <TAB>", the
5569 resulting expression will be evaluated at "file:line" -- but
5570 at there does not seem to be a way to detect this at
5572 scope
= default_macro_scope ();
5575 macro_for_each_in_scope (scope
->file
, scope
->line
,
5576 add_macro_name
, &datum
);
5580 /* User-defined macros are always visible. */
5581 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
5584 do_cleanups (cleanups
);
5588 default_make_symbol_completion_list_break_on (const char *text
,
5590 const char *break_on
,
5591 enum type_code code
)
5593 struct cleanup
*back_to
;
5596 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5600 default_make_symbol_completion_list_break_on_1 (text
, word
,
5603 CATCH (except
, RETURN_MASK_ERROR
)
5605 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5606 throw_exception (except
);
5610 discard_cleanups (back_to
);
5615 default_make_symbol_completion_list (const char *text
, const char *word
,
5616 enum type_code code
)
5618 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
5621 /* Return a vector of all symbols (regardless of class) which begin by
5622 matching TEXT. If the answer is no symbols, then the return value
5626 make_symbol_completion_list (const char *text
, const char *word
)
5628 return current_language
->la_make_symbol_completion_list (text
, word
,
5632 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
5633 symbols whose type code is CODE. */
5636 make_symbol_completion_type (const char *text
, const char *word
,
5637 enum type_code code
)
5639 gdb_assert (code
== TYPE_CODE_UNION
5640 || code
== TYPE_CODE_STRUCT
5641 || code
== TYPE_CODE_ENUM
);
5642 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
5645 /* Like make_symbol_completion_list, but suitable for use as a
5646 completion function. */
5649 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
5650 const char *text
, const char *word
)
5652 return make_symbol_completion_list (text
, word
);
5655 /* Like make_symbol_completion_list, but returns a list of symbols
5656 defined in a source file FILE. */
5658 static VEC (char_ptr
) *
5659 make_file_symbol_completion_list_1 (const char *text
, const char *word
,
5660 const char *srcfile
)
5665 struct block_iterator iter
;
5666 /* The symbol we are completing on. Points in same buffer as text. */
5667 const char *sym_text
;
5668 /* Length of sym_text. */
5671 /* Now look for the symbol we are supposed to complete on.
5672 FIXME: This should be language-specific. */
5676 const char *quote_pos
= NULL
;
5678 /* First see if this is a quoted string. */
5680 for (p
= text
; *p
!= '\0'; ++p
)
5682 if (quote_found
!= '\0')
5684 if (*p
== quote_found
)
5685 /* Found close quote. */
5687 else if (*p
== '\\' && p
[1] == quote_found
)
5688 /* A backslash followed by the quote character
5689 doesn't end the string. */
5692 else if (*p
== '\'' || *p
== '"')
5698 if (quote_found
== '\'')
5699 /* A string within single quotes can be a symbol, so complete on it. */
5700 sym_text
= quote_pos
+ 1;
5701 else if (quote_found
== '"')
5702 /* A double-quoted string is never a symbol, nor does it make sense
5703 to complete it any other way. */
5709 /* Not a quoted string. */
5710 sym_text
= language_search_unquoted_string (text
, p
);
5714 sym_text_len
= strlen (sym_text
);
5716 /* Find the symtab for SRCFILE (this loads it if it was not yet read
5718 s
= lookup_symtab (srcfile
);
5721 /* Maybe they typed the file with leading directories, while the
5722 symbol tables record only its basename. */
5723 const char *tail
= lbasename (srcfile
);
5726 s
= lookup_symtab (tail
);
5729 /* If we have no symtab for that file, return an empty list. */
5731 return (return_val
);
5733 /* Go through this symtab and check the externs and statics for
5734 symbols which match. */
5736 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), GLOBAL_BLOCK
);
5737 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5739 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5742 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), STATIC_BLOCK
);
5743 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5745 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5748 return (return_val
);
5751 /* Wrapper around make_file_symbol_completion_list_1
5752 to handle MAX_COMPLETIONS_REACHED_ERROR. */
5755 make_file_symbol_completion_list (const char *text
, const char *word
,
5756 const char *srcfile
)
5758 struct cleanup
*back_to
, *cleanups
;
5760 completion_tracker
= new_completion_tracker ();
5761 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5763 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5767 make_file_symbol_completion_list_1 (text
, word
, srcfile
);
5769 CATCH (except
, RETURN_MASK_ERROR
)
5771 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5772 throw_exception (except
);
5776 discard_cleanups (back_to
);
5777 do_cleanups (cleanups
);
5781 /* A helper function for make_source_files_completion_list. It adds
5782 another file name to a list of possible completions, growing the
5783 list as necessary. */
5786 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5787 VEC (char_ptr
) **list
)
5790 size_t fnlen
= strlen (fname
);
5794 /* Return exactly fname. */
5795 newobj
= (char *) xmalloc (fnlen
+ 5);
5796 strcpy (newobj
, fname
);
5798 else if (word
> text
)
5800 /* Return some portion of fname. */
5801 newobj
= (char *) xmalloc (fnlen
+ 5);
5802 strcpy (newobj
, fname
+ (word
- text
));
5806 /* Return some of TEXT plus fname. */
5807 newobj
= (char *) xmalloc (fnlen
+ (text
- word
) + 5);
5808 strncpy (newobj
, word
, text
- word
);
5809 newobj
[text
- word
] = '\0';
5810 strcat (newobj
, fname
);
5812 VEC_safe_push (char_ptr
, *list
, newobj
);
5816 not_interesting_fname (const char *fname
)
5818 static const char *illegal_aliens
[] = {
5819 "_globals_", /* inserted by coff_symtab_read */
5824 for (i
= 0; illegal_aliens
[i
]; i
++)
5826 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5832 /* An object of this type is passed as the user_data argument to
5833 map_partial_symbol_filenames. */
5834 struct add_partial_filename_data
5836 struct filename_seen_cache
*filename_seen_cache
;
5840 VEC (char_ptr
) **list
;
5843 /* A callback for map_partial_symbol_filenames. */
5846 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5849 struct add_partial_filename_data
*data
5850 = (struct add_partial_filename_data
*) user_data
;
5852 if (not_interesting_fname (filename
))
5854 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
5855 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5857 /* This file matches for a completion; add it to the
5858 current list of matches. */
5859 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5863 const char *base_name
= lbasename (filename
);
5865 if (base_name
!= filename
5866 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
5867 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5868 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5872 /* Return a vector of all source files whose names begin with matching
5873 TEXT. The file names are looked up in the symbol tables of this
5874 program. If the answer is no matchess, then the return value is
5878 make_source_files_completion_list (const char *text
, const char *word
)
5880 struct compunit_symtab
*cu
;
5882 struct objfile
*objfile
;
5883 size_t text_len
= strlen (text
);
5884 VEC (char_ptr
) *list
= NULL
;
5885 const char *base_name
;
5886 struct add_partial_filename_data datum
;
5887 struct filename_seen_cache
*filename_seen_cache
;
5888 struct cleanup
*back_to
, *cache_cleanup
;
5890 if (!have_full_symbols () && !have_partial_symbols ())
5893 back_to
= make_cleanup (do_free_completion_list
, &list
);
5895 filename_seen_cache
= create_filename_seen_cache ();
5896 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
5897 filename_seen_cache
);
5899 ALL_FILETABS (objfile
, cu
, s
)
5901 if (not_interesting_fname (s
->filename
))
5903 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
5904 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5906 /* This file matches for a completion; add it to the current
5908 add_filename_to_list (s
->filename
, text
, word
, &list
);
5912 /* NOTE: We allow the user to type a base name when the
5913 debug info records leading directories, but not the other
5914 way around. This is what subroutines of breakpoint
5915 command do when they parse file names. */
5916 base_name
= lbasename (s
->filename
);
5917 if (base_name
!= s
->filename
5918 && !filename_seen (filename_seen_cache
, base_name
, 1)
5919 && filename_ncmp (base_name
, text
, text_len
) == 0)
5920 add_filename_to_list (base_name
, text
, word
, &list
);
5924 datum
.filename_seen_cache
= filename_seen_cache
;
5927 datum
.text_len
= text_len
;
5929 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5930 0 /*need_fullname*/);
5932 do_cleanups (cache_cleanup
);
5933 discard_cleanups (back_to
);
5940 /* Return the "main_info" object for the current program space. If
5941 the object has not yet been created, create it and fill in some
5944 static struct main_info
*
5945 get_main_info (void)
5947 struct main_info
*info
5948 = (struct main_info
*) program_space_data (current_program_space
,
5949 main_progspace_key
);
5953 /* It may seem strange to store the main name in the progspace
5954 and also in whatever objfile happens to see a main name in
5955 its debug info. The reason for this is mainly historical:
5956 gdb returned "main" as the name even if no function named
5957 "main" was defined the program; and this approach lets us
5958 keep compatibility. */
5959 info
= XCNEW (struct main_info
);
5960 info
->language_of_main
= language_unknown
;
5961 set_program_space_data (current_program_space
, main_progspace_key
,
5968 /* A cleanup to destroy a struct main_info when a progspace is
5972 main_info_cleanup (struct program_space
*pspace
, void *data
)
5974 struct main_info
*info
= (struct main_info
*) data
;
5977 xfree (info
->name_of_main
);
5982 set_main_name (const char *name
, enum language lang
)
5984 struct main_info
*info
= get_main_info ();
5986 if (info
->name_of_main
!= NULL
)
5988 xfree (info
->name_of_main
);
5989 info
->name_of_main
= NULL
;
5990 info
->language_of_main
= language_unknown
;
5994 info
->name_of_main
= xstrdup (name
);
5995 info
->language_of_main
= lang
;
5999 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
6003 find_main_name (void)
6005 const char *new_main_name
;
6006 struct objfile
*objfile
;
6008 /* First check the objfiles to see whether a debuginfo reader has
6009 picked up the appropriate main name. Historically the main name
6010 was found in a more or less random way; this approach instead
6011 relies on the order of objfile creation -- which still isn't
6012 guaranteed to get the correct answer, but is just probably more
6014 ALL_OBJFILES (objfile
)
6016 if (objfile
->per_bfd
->name_of_main
!= NULL
)
6018 set_main_name (objfile
->per_bfd
->name_of_main
,
6019 objfile
->per_bfd
->language_of_main
);
6024 /* Try to see if the main procedure is in Ada. */
6025 /* FIXME: brobecker/2005-03-07: Another way of doing this would
6026 be to add a new method in the language vector, and call this
6027 method for each language until one of them returns a non-empty
6028 name. This would allow us to remove this hard-coded call to
6029 an Ada function. It is not clear that this is a better approach
6030 at this point, because all methods need to be written in a way
6031 such that false positives never be returned. For instance, it is
6032 important that a method does not return a wrong name for the main
6033 procedure if the main procedure is actually written in a different
6034 language. It is easy to guaranty this with Ada, since we use a
6035 special symbol generated only when the main in Ada to find the name
6036 of the main procedure. It is difficult however to see how this can
6037 be guarantied for languages such as C, for instance. This suggests
6038 that order of call for these methods becomes important, which means
6039 a more complicated approach. */
6040 new_main_name
= ada_main_name ();
6041 if (new_main_name
!= NULL
)
6043 set_main_name (new_main_name
, language_ada
);
6047 new_main_name
= d_main_name ();
6048 if (new_main_name
!= NULL
)
6050 set_main_name (new_main_name
, language_d
);
6054 new_main_name
= go_main_name ();
6055 if (new_main_name
!= NULL
)
6057 set_main_name (new_main_name
, language_go
);
6061 new_main_name
= pascal_main_name ();
6062 if (new_main_name
!= NULL
)
6064 set_main_name (new_main_name
, language_pascal
);
6068 /* The languages above didn't identify the name of the main procedure.
6069 Fallback to "main". */
6070 set_main_name ("main", language_unknown
);
6076 struct main_info
*info
= get_main_info ();
6078 if (info
->name_of_main
== NULL
)
6081 return info
->name_of_main
;
6084 /* Return the language of the main function. If it is not known,
6085 return language_unknown. */
6088 main_language (void)
6090 struct main_info
*info
= get_main_info ();
6092 if (info
->name_of_main
== NULL
)
6095 return info
->language_of_main
;
6098 /* Handle ``executable_changed'' events for the symtab module. */
6101 symtab_observer_executable_changed (void)
6103 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
6104 set_main_name (NULL
, language_unknown
);
6107 /* Return 1 if the supplied producer string matches the ARM RealView
6108 compiler (armcc). */
6111 producer_is_realview (const char *producer
)
6113 static const char *const arm_idents
[] = {
6114 "ARM C Compiler, ADS",
6115 "Thumb C Compiler, ADS",
6116 "ARM C++ Compiler, ADS",
6117 "Thumb C++ Compiler, ADS",
6118 "ARM/Thumb C/C++ Compiler, RVCT",
6119 "ARM C/C++ Compiler, RVCT"
6123 if (producer
== NULL
)
6126 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
6127 if (startswith (producer
, arm_idents
[i
]))
6135 /* The next index to hand out in response to a registration request. */
6137 static int next_aclass_value
= LOC_FINAL_VALUE
;
6139 /* The maximum number of "aclass" registrations we support. This is
6140 constant for convenience. */
6141 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
6143 /* The objects representing the various "aclass" values. The elements
6144 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
6145 elements are those registered at gdb initialization time. */
6147 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
6149 /* The globally visible pointer. This is separate from 'symbol_impl'
6150 so that it can be const. */
6152 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
6154 /* Make sure we saved enough room in struct symbol. */
6156 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
6158 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
6159 is the ops vector associated with this index. This returns the new
6160 index, which should be used as the aclass_index field for symbols
6164 register_symbol_computed_impl (enum address_class aclass
,
6165 const struct symbol_computed_ops
*ops
)
6167 int result
= next_aclass_value
++;
6169 gdb_assert (aclass
== LOC_COMPUTED
);
6170 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6171 symbol_impl
[result
].aclass
= aclass
;
6172 symbol_impl
[result
].ops_computed
= ops
;
6174 /* Sanity check OPS. */
6175 gdb_assert (ops
!= NULL
);
6176 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
6177 gdb_assert (ops
->describe_location
!= NULL
);
6178 gdb_assert (ops
->read_needs_frame
!= NULL
);
6179 gdb_assert (ops
->read_variable
!= NULL
);
6184 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
6185 OPS is the ops vector associated with this index. This returns the
6186 new index, which should be used as the aclass_index field for symbols
6190 register_symbol_block_impl (enum address_class aclass
,
6191 const struct symbol_block_ops
*ops
)
6193 int result
= next_aclass_value
++;
6195 gdb_assert (aclass
== LOC_BLOCK
);
6196 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6197 symbol_impl
[result
].aclass
= aclass
;
6198 symbol_impl
[result
].ops_block
= ops
;
6200 /* Sanity check OPS. */
6201 gdb_assert (ops
!= NULL
);
6202 gdb_assert (ops
->find_frame_base_location
!= NULL
);
6207 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
6208 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
6209 this index. This returns the new index, which should be used as
6210 the aclass_index field for symbols of this type. */
6213 register_symbol_register_impl (enum address_class aclass
,
6214 const struct symbol_register_ops
*ops
)
6216 int result
= next_aclass_value
++;
6218 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
6219 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6220 symbol_impl
[result
].aclass
= aclass
;
6221 symbol_impl
[result
].ops_register
= ops
;
6226 /* Initialize elements of 'symbol_impl' for the constants in enum
6230 initialize_ordinary_address_classes (void)
6234 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
6235 symbol_impl
[i
].aclass
= (enum address_class
) i
;
6240 /* Helper function to initialize the fields of an objfile-owned symbol.
6241 It assumed that *SYM is already all zeroes. */
6244 initialize_objfile_symbol_1 (struct symbol
*sym
)
6246 SYMBOL_OBJFILE_OWNED (sym
) = 1;
6247 SYMBOL_SECTION (sym
) = -1;
6250 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
6253 initialize_objfile_symbol (struct symbol
*sym
)
6255 memset (sym
, 0, sizeof (*sym
));
6256 initialize_objfile_symbol_1 (sym
);
6259 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
6263 allocate_symbol (struct objfile
*objfile
)
6265 struct symbol
*result
;
6267 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6268 initialize_objfile_symbol_1 (result
);
6273 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
6276 struct template_symbol
*
6277 allocate_template_symbol (struct objfile
*objfile
)
6279 struct template_symbol
*result
;
6281 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
6282 initialize_objfile_symbol_1 (&result
->base
);
6290 symbol_objfile (const struct symbol
*symbol
)
6292 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6293 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6299 symbol_arch (const struct symbol
*symbol
)
6301 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6302 return symbol
->owner
.arch
;
6303 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6309 symbol_symtab (const struct symbol
*symbol
)
6311 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6312 return symbol
->owner
.symtab
;
6318 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6320 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6321 symbol
->owner
.symtab
= symtab
;
6327 _initialize_symtab (void)
6329 initialize_ordinary_address_classes ();
6332 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6335 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6337 add_info ("variables", variables_info
, _("\
6338 All global and static variable names, or those matching REGEXP."));
6340 add_com ("whereis", class_info
, variables_info
, _("\
6341 All global and static variable names, or those matching REGEXP."));
6343 add_info ("functions", functions_info
,
6344 _("All function names, or those matching REGEXP."));
6346 /* FIXME: This command has at least the following problems:
6347 1. It prints builtin types (in a very strange and confusing fashion).
6348 2. It doesn't print right, e.g. with
6349 typedef struct foo *FOO
6350 type_print prints "FOO" when we want to make it (in this situation)
6351 print "struct foo *".
6352 I also think "ptype" or "whatis" is more likely to be useful (but if
6353 there is much disagreement "info types" can be fixed). */
6354 add_info ("types", types_info
,
6355 _("All type names, or those matching REGEXP."));
6357 add_info ("sources", sources_info
,
6358 _("Source files in the program."));
6360 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6361 _("Set a breakpoint for all functions matching REGEXP."));
6363 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6364 multiple_symbols_modes
, &multiple_symbols_mode
,
6366 Set the debugger behavior when more than one symbol are possible matches\n\
6367 in an expression."), _("\
6368 Show how the debugger handles ambiguities in expressions."), _("\
6369 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6370 NULL
, NULL
, &setlist
, &showlist
);
6372 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6373 &basenames_may_differ
, _("\
6374 Set whether a source file may have multiple base names."), _("\
6375 Show whether a source file may have multiple base names."), _("\
6376 (A \"base name\" is the name of a file with the directory part removed.\n\
6377 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6378 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6379 before comparing them. Canonicalization is an expensive operation,\n\
6380 but it allows the same file be known by more than one base name.\n\
6381 If not set (the default), all source files are assumed to have just\n\
6382 one base name, and gdb will do file name comparisons more efficiently."),
6384 &setlist
, &showlist
);
6386 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6387 _("Set debugging of symbol table creation."),
6388 _("Show debugging of symbol table creation."), _("\
6389 When enabled (non-zero), debugging messages are printed when building\n\
6390 symbol tables. A value of 1 (one) normally provides enough information.\n\
6391 A value greater than 1 provides more verbose information."),
6394 &setdebuglist
, &showdebuglist
);
6396 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6398 Set debugging of symbol lookup."), _("\
6399 Show debugging of symbol lookup."), _("\
6400 When enabled (non-zero), symbol lookups are logged."),
6402 &setdebuglist
, &showdebuglist
);
6404 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6405 &new_symbol_cache_size
,
6406 _("Set the size of the symbol cache."),
6407 _("Show the size of the symbol cache."), _("\
6408 The size of the symbol cache.\n\
6409 If zero then the symbol cache is disabled."),
6410 set_symbol_cache_size_handler
, NULL
,
6411 &maintenance_set_cmdlist
,
6412 &maintenance_show_cmdlist
);
6414 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6415 _("Dump the symbol cache for each program space."),
6416 &maintenanceprintlist
);
6418 add_cmd ("symbol-cache-statistics", class_maintenance
,
6419 maintenance_print_symbol_cache_statistics
,
6420 _("Print symbol cache statistics for each program space."),
6421 &maintenanceprintlist
);
6423 add_cmd ("flush-symbol-cache", class_maintenance
,
6424 maintenance_flush_symbol_cache
,
6425 _("Flush the symbol cache for each program space."),
6428 observer_attach_executable_changed (symtab_observer_executable_changed
);
6429 observer_attach_new_objfile (symtab_new_objfile_observer
);
6430 observer_attach_free_objfile (symtab_free_objfile_observer
);