1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2013 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"
46 #include "gdb_obstack.h"
48 #include "dictionary.h"
50 #include <sys/types.h>
52 #include "gdb_string.h"
56 #include "cp-support.h"
58 #include "gdb_assert.h"
61 #include "macroscope.h"
64 #include "parser-defs.h"
66 /* Prototypes for local functions */
68 static void rbreak_command (char *, int);
70 static void types_info (char *, int);
72 static void functions_info (char *, int);
74 static void variables_info (char *, int);
76 static void sources_info (char *, int);
78 static int find_line_common (struct linetable *, int, int *, int);
80 static struct symbol *lookup_symbol_aux (const char *name,
81 const struct block *block,
82 const domain_enum domain,
83 enum language language,
84 struct field_of_this_result *is_a_field_of_this);
87 struct symbol *lookup_symbol_aux_local (const char *name,
88 const struct block *block,
89 const domain_enum domain,
90 enum language language);
93 struct symbol *lookup_symbol_aux_symtabs (int block_index,
95 const domain_enum domain);
98 struct symbol *lookup_symbol_aux_quick (struct objfile *objfile,
101 const domain_enum domain);
103 static void print_msymbol_info (struct minimal_symbol *);
105 void _initialize_symtab (void);
109 /* When non-zero, print debugging messages related to symtab creation. */
110 int symtab_create_debug = 0;
112 /* Non-zero if a file may be known by two different basenames.
113 This is the uncommon case, and significantly slows down gdb.
114 Default set to "off" to not slow down the common case. */
115 int basenames_may_differ = 0;
117 /* Allow the user to configure the debugger behavior with respect
118 to multiple-choice menus when more than one symbol matches during
121 const char multiple_symbols_ask[] = "ask";
122 const char multiple_symbols_all[] = "all";
123 const char multiple_symbols_cancel[] = "cancel";
124 static const char *const multiple_symbols_modes[] =
126 multiple_symbols_ask,
127 multiple_symbols_all,
128 multiple_symbols_cancel,
131 static const char *multiple_symbols_mode = multiple_symbols_all;
133 /* Read-only accessor to AUTO_SELECT_MODE. */
136 multiple_symbols_select_mode (void)
138 return multiple_symbols_mode;
141 /* Block in which the most recently searched-for symbol was found.
142 Might be better to make this a parameter to lookup_symbol and
145 const struct block *block_found;
147 /* See whether FILENAME matches SEARCH_NAME using the rule that we
148 advertise to the user. (The manual's description of linespecs
149 describes what we advertise). Returns true if they match, false
153 compare_filenames_for_search (const char *filename, const char *search_name)
155 int len = strlen (filename);
156 size_t search_len = strlen (search_name);
158 if (len < search_len)
161 /* The tail of FILENAME must match. */
162 if (FILENAME_CMP (filename + len - search_len, search_name) != 0)
165 /* Either the names must completely match, or the character
166 preceding the trailing SEARCH_NAME segment of FILENAME must be a
169 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
170 cannot match FILENAME "/path//dir/file.c" - as user has requested
171 absolute path. The sama applies for "c:\file.c" possibly
172 incorrectly hypothetically matching "d:\dir\c:\file.c".
174 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
175 compatible with SEARCH_NAME "file.c". In such case a compiler had
176 to put the "c:file.c" name into debug info. Such compatibility
177 works only on GDB built for DOS host. */
178 return (len == search_len
179 || (!IS_ABSOLUTE_PATH (search_name)
180 && IS_DIR_SEPARATOR (filename[len - search_len - 1]))
181 || (HAS_DRIVE_SPEC (filename)
182 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
185 /* Check for a symtab of a specific name by searching some symtabs.
186 This is a helper function for callbacks of iterate_over_symtabs.
188 The return value, NAME, REAL_PATH, CALLBACK, and DATA
189 are identical to the `map_symtabs_matching_filename' method of
190 quick_symbol_functions.
192 FIRST and AFTER_LAST indicate the range of symtabs to search.
193 AFTER_LAST is one past the last symtab to search; NULL means to
194 search until the end of the list. */
197 iterate_over_some_symtabs (const char *name,
198 const char *real_path,
199 int (*callback) (struct symtab *symtab,
202 struct symtab *first,
203 struct symtab *after_last)
205 struct symtab *s = NULL;
206 const char* base_name = lbasename (name);
208 for (s = first; s != NULL && s != after_last; s = s->next)
210 if (compare_filenames_for_search (s->filename, name))
212 if (callback (s, data))
216 /* Before we invoke realpath, which can get expensive when many
217 files are involved, do a quick comparison of the basenames. */
218 if (! basenames_may_differ
219 && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
222 if (compare_filenames_for_search (symtab_to_fullname (s), name))
224 if (callback (s, data))
228 /* If the user gave us an absolute path, try to find the file in
229 this symtab and use its absolute path. */
231 if (real_path != NULL)
233 const char *fullname = symtab_to_fullname (s);
235 gdb_assert (IS_ABSOLUTE_PATH (real_path));
236 gdb_assert (IS_ABSOLUTE_PATH (name));
237 if (FILENAME_CMP (real_path, fullname) == 0)
239 if (callback (s, data))
248 /* Check for a symtab of a specific name; first in symtabs, then in
249 psymtabs. *If* there is no '/' in the name, a match after a '/'
250 in the symtab filename will also work.
252 Calls CALLBACK with each symtab that is found and with the supplied
253 DATA. If CALLBACK returns true, the search stops. */
256 iterate_over_symtabs (const char *name,
257 int (*callback) (struct symtab *symtab,
261 struct objfile *objfile;
262 char *real_path = NULL;
263 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
265 /* Here we are interested in canonicalizing an absolute path, not
266 absolutizing a relative path. */
267 if (IS_ABSOLUTE_PATH (name))
269 real_path = gdb_realpath (name);
270 make_cleanup (xfree, real_path);
271 gdb_assert (IS_ABSOLUTE_PATH (real_path));
274 ALL_OBJFILES (objfile)
276 if (iterate_over_some_symtabs (name, real_path, callback, data,
277 objfile->symtabs, NULL))
279 do_cleanups (cleanups);
284 /* Same search rules as above apply here, but now we look thru the
287 ALL_OBJFILES (objfile)
290 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
296 do_cleanups (cleanups);
301 do_cleanups (cleanups);
304 /* The callback function used by lookup_symtab. */
307 lookup_symtab_callback (struct symtab *symtab, void *data)
309 struct symtab **result_ptr = data;
311 *result_ptr = symtab;
315 /* A wrapper for iterate_over_symtabs that returns the first matching
319 lookup_symtab (const char *name)
321 struct symtab *result = NULL;
323 iterate_over_symtabs (name, lookup_symtab_callback, &result);
328 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
329 full method name, which consist of the class name (from T), the unadorned
330 method name from METHOD_ID, and the signature for the specific overload,
331 specified by SIGNATURE_ID. Note that this function is g++ specific. */
334 gdb_mangle_name (struct type *type, int method_id, int signature_id)
336 int mangled_name_len;
338 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
339 struct fn_field *method = &f[signature_id];
340 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
341 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
342 const char *newname = type_name_no_tag (type);
344 /* Does the form of physname indicate that it is the full mangled name
345 of a constructor (not just the args)? */
346 int is_full_physname_constructor;
349 int is_destructor = is_destructor_name (physname);
350 /* Need a new type prefix. */
351 char *const_prefix = method->is_const ? "C" : "";
352 char *volatile_prefix = method->is_volatile ? "V" : "";
354 int len = (newname == NULL ? 0 : strlen (newname));
356 /* Nothing to do if physname already contains a fully mangled v3 abi name
357 or an operator name. */
358 if ((physname[0] == '_' && physname[1] == 'Z')
359 || is_operator_name (field_name))
360 return xstrdup (physname);
362 is_full_physname_constructor = is_constructor_name (physname);
364 is_constructor = is_full_physname_constructor
365 || (newname && strcmp (field_name, newname) == 0);
368 is_destructor = (strncmp (physname, "__dt", 4) == 0);
370 if (is_destructor || is_full_physname_constructor)
372 mangled_name = (char *) xmalloc (strlen (physname) + 1);
373 strcpy (mangled_name, physname);
379 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
381 else if (physname[0] == 't' || physname[0] == 'Q')
383 /* The physname for template and qualified methods already includes
385 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
391 xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix,
392 volatile_prefix, len);
394 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
395 + strlen (buf) + len + strlen (physname) + 1);
397 mangled_name = (char *) xmalloc (mangled_name_len);
399 mangled_name[0] = '\0';
401 strcpy (mangled_name, field_name);
403 strcat (mangled_name, buf);
404 /* If the class doesn't have a name, i.e. newname NULL, then we just
405 mangle it using 0 for the length of the class. Thus it gets mangled
406 as something starting with `::' rather than `classname::'. */
408 strcat (mangled_name, newname);
410 strcat (mangled_name, physname);
411 return (mangled_name);
414 /* Initialize the cplus_specific structure. 'cplus_specific' should
415 only be allocated for use with cplus symbols. */
418 symbol_init_cplus_specific (struct general_symbol_info *gsymbol,
419 struct objfile *objfile)
421 /* A language_specific structure should not have been previously
423 gdb_assert (gsymbol->language_specific.cplus_specific == NULL);
424 gdb_assert (objfile != NULL);
426 gsymbol->language_specific.cplus_specific =
427 OBSTACK_ZALLOC (&objfile->objfile_obstack, struct cplus_specific);
430 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
431 correctly allocated. For C++ symbols a cplus_specific struct is
432 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
433 OBJFILE can be NULL. */
436 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
438 struct objfile *objfile)
440 if (gsymbol->language == language_cplus)
442 if (gsymbol->language_specific.cplus_specific == NULL)
443 symbol_init_cplus_specific (gsymbol, objfile);
445 gsymbol->language_specific.cplus_specific->demangled_name = name;
448 gsymbol->language_specific.mangled_lang.demangled_name = name;
451 /* Return the demangled name of GSYMBOL. */
454 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
456 if (gsymbol->language == language_cplus)
458 if (gsymbol->language_specific.cplus_specific != NULL)
459 return gsymbol->language_specific.cplus_specific->demangled_name;
464 return gsymbol->language_specific.mangled_lang.demangled_name;
468 /* Initialize the language dependent portion of a symbol
469 depending upon the language for the symbol. */
472 symbol_set_language (struct general_symbol_info *gsymbol,
473 enum language language)
475 gsymbol->language = language;
476 if (gsymbol->language == language_d
477 || gsymbol->language == language_go
478 || gsymbol->language == language_java
479 || gsymbol->language == language_objc
480 || gsymbol->language == language_fortran)
482 symbol_set_demangled_name (gsymbol, NULL, NULL);
484 else if (gsymbol->language == language_cplus)
485 gsymbol->language_specific.cplus_specific = NULL;
488 memset (&gsymbol->language_specific, 0,
489 sizeof (gsymbol->language_specific));
493 /* Functions to initialize a symbol's mangled name. */
495 /* Objects of this type are stored in the demangled name hash table. */
496 struct demangled_name_entry
502 /* Hash function for the demangled name hash. */
505 hash_demangled_name_entry (const void *data)
507 const struct demangled_name_entry *e = data;
509 return htab_hash_string (e->mangled);
512 /* Equality function for the demangled name hash. */
515 eq_demangled_name_entry (const void *a, const void *b)
517 const struct demangled_name_entry *da = a;
518 const struct demangled_name_entry *db = b;
520 return strcmp (da->mangled, db->mangled) == 0;
523 /* Create the hash table used for demangled names. Each hash entry is
524 a pair of strings; one for the mangled name and one for the demangled
525 name. The entry is hashed via just the mangled name. */
528 create_demangled_names_hash (struct objfile *objfile)
530 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
531 The hash table code will round this up to the next prime number.
532 Choosing a much larger table size wastes memory, and saves only about
533 1% in symbol reading. */
535 objfile->demangled_names_hash = htab_create_alloc
536 (256, hash_demangled_name_entry, eq_demangled_name_entry,
537 NULL, xcalloc, xfree);
540 /* Try to determine the demangled name for a symbol, based on the
541 language of that symbol. If the language is set to language_auto,
542 it will attempt to find any demangling algorithm that works and
543 then set the language appropriately. The returned name is allocated
544 by the demangler and should be xfree'd. */
547 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
550 char *demangled = NULL;
552 if (gsymbol->language == language_unknown)
553 gsymbol->language = language_auto;
555 if (gsymbol->language == language_objc
556 || gsymbol->language == language_auto)
559 objc_demangle (mangled, 0);
560 if (demangled != NULL)
562 gsymbol->language = language_objc;
566 if (gsymbol->language == language_cplus
567 || gsymbol->language == language_auto)
570 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
571 if (demangled != NULL)
573 gsymbol->language = language_cplus;
577 if (gsymbol->language == language_java)
580 cplus_demangle (mangled,
581 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
582 if (demangled != NULL)
584 gsymbol->language = language_java;
588 if (gsymbol->language == language_d
589 || gsymbol->language == language_auto)
591 demangled = d_demangle(mangled, 0);
592 if (demangled != NULL)
594 gsymbol->language = language_d;
598 /* FIXME(dje): Continually adding languages here is clumsy.
599 Better to just call la_demangle if !auto, and if auto then call
600 a utility routine that tries successive languages in turn and reports
601 which one it finds. I realize the la_demangle options may be different
602 for different languages but there's already a FIXME for that. */
603 if (gsymbol->language == language_go
604 || gsymbol->language == language_auto)
606 demangled = go_demangle (mangled, 0);
607 if (demangled != NULL)
609 gsymbol->language = language_go;
614 /* We could support `gsymbol->language == language_fortran' here to provide
615 module namespaces also for inferiors with only minimal symbol table (ELF
616 symbols). Just the mangling standard is not standardized across compilers
617 and there is no DW_AT_producer available for inferiors with only the ELF
618 symbols to check the mangling kind. */
622 /* Set both the mangled and demangled (if any) names for GSYMBOL based
623 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
624 objfile's obstack; but if COPY_NAME is 0 and if NAME is
625 NUL-terminated, then this function assumes that NAME is already
626 correctly saved (either permanently or with a lifetime tied to the
627 objfile), and it will not be copied.
629 The hash table corresponding to OBJFILE is used, and the memory
630 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
631 so the pointer can be discarded after calling this function. */
633 /* We have to be careful when dealing with Java names: when we run
634 into a Java minimal symbol, we don't know it's a Java symbol, so it
635 gets demangled as a C++ name. This is unfortunate, but there's not
636 much we can do about it: but when demangling partial symbols and
637 regular symbols, we'd better not reuse the wrong demangled name.
638 (See PR gdb/1039.) We solve this by putting a distinctive prefix
639 on Java names when storing them in the hash table. */
641 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
642 don't mind the Java prefix so much: different languages have
643 different demangling requirements, so it's only natural that we
644 need to keep language data around in our demangling cache. But
645 it's not good that the minimal symbol has the wrong demangled name.
646 Unfortunately, I can't think of any easy solution to that
649 #define JAVA_PREFIX "##JAVA$$"
650 #define JAVA_PREFIX_LEN 8
653 symbol_set_names (struct general_symbol_info *gsymbol,
654 const char *linkage_name, int len, int copy_name,
655 struct objfile *objfile)
657 struct demangled_name_entry **slot;
658 /* A 0-terminated copy of the linkage name. */
659 const char *linkage_name_copy;
660 /* A copy of the linkage name that might have a special Java prefix
661 added to it, for use when looking names up in the hash table. */
662 const char *lookup_name;
663 /* The length of lookup_name. */
665 struct demangled_name_entry entry;
667 if (gsymbol->language == language_ada)
669 /* In Ada, we do the symbol lookups using the mangled name, so
670 we can save some space by not storing the demangled name.
672 As a side note, we have also observed some overlap between
673 the C++ mangling and Ada mangling, similarly to what has
674 been observed with Java. Because we don't store the demangled
675 name with the symbol, we don't need to use the same trick
678 gsymbol->name = linkage_name;
681 char *name = obstack_alloc (&objfile->objfile_obstack, len + 1);
683 memcpy (name, linkage_name, len);
685 gsymbol->name = name;
687 symbol_set_demangled_name (gsymbol, NULL, NULL);
692 if (objfile->demangled_names_hash == NULL)
693 create_demangled_names_hash (objfile);
695 /* The stabs reader generally provides names that are not
696 NUL-terminated; most of the other readers don't do this, so we
697 can just use the given copy, unless we're in the Java case. */
698 if (gsymbol->language == language_java)
702 lookup_len = len + JAVA_PREFIX_LEN;
703 alloc_name = alloca (lookup_len + 1);
704 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
705 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
706 alloc_name[lookup_len] = '\0';
708 lookup_name = alloc_name;
709 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
711 else if (linkage_name[len] != '\0')
716 alloc_name = alloca (lookup_len + 1);
717 memcpy (alloc_name, linkage_name, len);
718 alloc_name[lookup_len] = '\0';
720 lookup_name = alloc_name;
721 linkage_name_copy = alloc_name;
726 lookup_name = linkage_name;
727 linkage_name_copy = linkage_name;
730 entry.mangled = lookup_name;
731 slot = ((struct demangled_name_entry **)
732 htab_find_slot (objfile->demangled_names_hash,
735 /* If this name is not in the hash table, add it. */
737 /* A C version of the symbol may have already snuck into the table.
738 This happens to, e.g., main.init (__go_init_main). Cope. */
739 || (gsymbol->language == language_go
740 && (*slot)->demangled[0] == '\0'))
742 char *demangled_name = symbol_find_demangled_name (gsymbol,
744 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
746 /* Suppose we have demangled_name==NULL, copy_name==0, and
747 lookup_name==linkage_name. In this case, we already have the
748 mangled name saved, and we don't have a demangled name. So,
749 you might think we could save a little space by not recording
750 this in the hash table at all.
752 It turns out that it is actually important to still save such
753 an entry in the hash table, because storing this name gives
754 us better bcache hit rates for partial symbols. */
755 if (!copy_name && lookup_name == linkage_name)
757 *slot = obstack_alloc (&objfile->objfile_obstack,
758 offsetof (struct demangled_name_entry,
760 + demangled_len + 1);
761 (*slot)->mangled = lookup_name;
767 /* If we must copy the mangled name, put it directly after
768 the demangled name so we can have a single
770 *slot = obstack_alloc (&objfile->objfile_obstack,
771 offsetof (struct demangled_name_entry,
773 + lookup_len + demangled_len + 2);
774 mangled_ptr = &((*slot)->demangled[demangled_len + 1]);
775 strcpy (mangled_ptr, lookup_name);
776 (*slot)->mangled = mangled_ptr;
779 if (demangled_name != NULL)
781 strcpy ((*slot)->demangled, demangled_name);
782 xfree (demangled_name);
785 (*slot)->demangled[0] = '\0';
788 gsymbol->name = (*slot)->mangled + lookup_len - len;
789 if ((*slot)->demangled[0] != '\0')
790 symbol_set_demangled_name (gsymbol, (*slot)->demangled, objfile);
792 symbol_set_demangled_name (gsymbol, NULL, objfile);
795 /* Return the source code name of a symbol. In languages where
796 demangling is necessary, this is the demangled name. */
799 symbol_natural_name (const struct general_symbol_info *gsymbol)
801 switch (gsymbol->language)
808 case language_fortran:
809 if (symbol_get_demangled_name (gsymbol) != NULL)
810 return symbol_get_demangled_name (gsymbol);
813 if (symbol_get_demangled_name (gsymbol) != NULL)
814 return symbol_get_demangled_name (gsymbol);
816 return ada_decode_symbol (gsymbol);
821 return gsymbol->name;
824 /* Return the demangled name for a symbol based on the language for
825 that symbol. If no demangled name exists, return NULL. */
828 symbol_demangled_name (const struct general_symbol_info *gsymbol)
830 const char *dem_name = NULL;
832 switch (gsymbol->language)
839 case language_fortran:
840 dem_name = symbol_get_demangled_name (gsymbol);
843 dem_name = symbol_get_demangled_name (gsymbol);
844 if (dem_name == NULL)
845 dem_name = ada_decode_symbol (gsymbol);
853 /* Return the search name of a symbol---generally the demangled or
854 linkage name of the symbol, depending on how it will be searched for.
855 If there is no distinct demangled name, then returns the same value
856 (same pointer) as SYMBOL_LINKAGE_NAME. */
859 symbol_search_name (const struct general_symbol_info *gsymbol)
861 if (gsymbol->language == language_ada)
862 return gsymbol->name;
864 return symbol_natural_name (gsymbol);
867 /* Initialize the structure fields to zero values. */
870 init_sal (struct symtab_and_line *sal)
878 sal->explicit_pc = 0;
879 sal->explicit_line = 0;
884 /* Return 1 if the two sections are the same, or if they could
885 plausibly be copies of each other, one in an original object
886 file and another in a separated debug file. */
889 matching_obj_sections (struct obj_section *obj_first,
890 struct obj_section *obj_second)
892 asection *first = obj_first? obj_first->the_bfd_section : NULL;
893 asection *second = obj_second? obj_second->the_bfd_section : NULL;
896 /* If they're the same section, then they match. */
900 /* If either is NULL, give up. */
901 if (first == NULL || second == NULL)
904 /* This doesn't apply to absolute symbols. */
905 if (first->owner == NULL || second->owner == NULL)
908 /* If they're in the same object file, they must be different sections. */
909 if (first->owner == second->owner)
912 /* Check whether the two sections are potentially corresponding. They must
913 have the same size, address, and name. We can't compare section indexes,
914 which would be more reliable, because some sections may have been
916 if (bfd_get_section_size (first) != bfd_get_section_size (second))
919 /* In-memory addresses may start at a different offset, relativize them. */
920 if (bfd_get_section_vma (first->owner, first)
921 - bfd_get_start_address (first->owner)
922 != bfd_get_section_vma (second->owner, second)
923 - bfd_get_start_address (second->owner))
926 if (bfd_get_section_name (first->owner, first) == NULL
927 || bfd_get_section_name (second->owner, second) == NULL
928 || strcmp (bfd_get_section_name (first->owner, first),
929 bfd_get_section_name (second->owner, second)) != 0)
932 /* Otherwise check that they are in corresponding objfiles. */
935 if (obj->obfd == first->owner)
937 gdb_assert (obj != NULL);
939 if (obj->separate_debug_objfile != NULL
940 && obj->separate_debug_objfile->obfd == second->owner)
942 if (obj->separate_debug_objfile_backlink != NULL
943 && obj->separate_debug_objfile_backlink->obfd == second->owner)
950 find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section)
952 struct objfile *objfile;
953 struct minimal_symbol *msymbol;
955 /* If we know that this is not a text address, return failure. This is
956 necessary because we loop based on texthigh and textlow, which do
957 not include the data ranges. */
958 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
960 && (MSYMBOL_TYPE (msymbol) == mst_data
961 || MSYMBOL_TYPE (msymbol) == mst_bss
962 || MSYMBOL_TYPE (msymbol) == mst_abs
963 || MSYMBOL_TYPE (msymbol) == mst_file_data
964 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
967 ALL_OBJFILES (objfile)
969 struct symtab *result = NULL;
972 result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
981 /* Debug symbols usually don't have section information. We need to dig that
982 out of the minimal symbols and stash that in the debug symbol. */
985 fixup_section (struct general_symbol_info *ginfo,
986 CORE_ADDR addr, struct objfile *objfile)
988 struct minimal_symbol *msym;
990 /* First, check whether a minimal symbol with the same name exists
991 and points to the same address. The address check is required
992 e.g. on PowerPC64, where the minimal symbol for a function will
993 point to the function descriptor, while the debug symbol will
994 point to the actual function code. */
995 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
998 ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
999 ginfo->section = SYMBOL_SECTION (msym);
1003 /* Static, function-local variables do appear in the linker
1004 (minimal) symbols, but are frequently given names that won't
1005 be found via lookup_minimal_symbol(). E.g., it has been
1006 observed in frv-uclinux (ELF) executables that a static,
1007 function-local variable named "foo" might appear in the
1008 linker symbols as "foo.6" or "foo.3". Thus, there is no
1009 point in attempting to extend the lookup-by-name mechanism to
1010 handle this case due to the fact that there can be multiple
1013 So, instead, search the section table when lookup by name has
1014 failed. The ``addr'' and ``endaddr'' fields may have already
1015 been relocated. If so, the relocation offset (i.e. the
1016 ANOFFSET value) needs to be subtracted from these values when
1017 performing the comparison. We unconditionally subtract it,
1018 because, when no relocation has been performed, the ANOFFSET
1019 value will simply be zero.
1021 The address of the symbol whose section we're fixing up HAS
1022 NOT BEEN adjusted (relocated) yet. It can't have been since
1023 the section isn't yet known and knowing the section is
1024 necessary in order to add the correct relocation value. In
1025 other words, we wouldn't even be in this function (attempting
1026 to compute the section) if it were already known.
1028 Note that it is possible to search the minimal symbols
1029 (subtracting the relocation value if necessary) to find the
1030 matching minimal symbol, but this is overkill and much less
1031 efficient. It is not necessary to find the matching minimal
1032 symbol, only its section.
1034 Note that this technique (of doing a section table search)
1035 can fail when unrelocated section addresses overlap. For
1036 this reason, we still attempt a lookup by name prior to doing
1037 a search of the section table. */
1039 struct obj_section *s;
1041 ALL_OBJFILE_OSECTIONS (objfile, s)
1043 int idx = s->the_bfd_section->index;
1044 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1046 if (obj_section_addr (s) - offset <= addr
1047 && addr < obj_section_endaddr (s) - offset)
1049 ginfo->obj_section = s;
1050 ginfo->section = idx;
1058 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1065 if (SYMBOL_OBJ_SECTION (sym))
1068 /* We either have an OBJFILE, or we can get at it from the sym's
1069 symtab. Anything else is a bug. */
1070 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1072 if (objfile == NULL)
1073 objfile = SYMBOL_SYMTAB (sym)->objfile;
1075 /* We should have an objfile by now. */
1076 gdb_assert (objfile);
1078 switch (SYMBOL_CLASS (sym))
1082 addr = SYMBOL_VALUE_ADDRESS (sym);
1085 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1089 /* Nothing else will be listed in the minsyms -- no use looking
1094 fixup_section (&sym->ginfo, addr, objfile);
1099 /* Compute the demangled form of NAME as used by the various symbol
1100 lookup functions. The result is stored in *RESULT_NAME. Returns a
1101 cleanup which can be used to clean up the result.
1103 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1104 Normally, Ada symbol lookups are performed using the encoded name
1105 rather than the demangled name, and so it might seem to make sense
1106 for this function to return an encoded version of NAME.
1107 Unfortunately, we cannot do this, because this function is used in
1108 circumstances where it is not appropriate to try to encode NAME.
1109 For instance, when displaying the frame info, we demangle the name
1110 of each parameter, and then perform a symbol lookup inside our
1111 function using that demangled name. In Ada, certain functions
1112 have internally-generated parameters whose name contain uppercase
1113 characters. Encoding those name would result in those uppercase
1114 characters to become lowercase, and thus cause the symbol lookup
1118 demangle_for_lookup (const char *name, enum language lang,
1119 const char **result_name)
1121 char *demangled_name = NULL;
1122 const char *modified_name = NULL;
1123 struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
1125 modified_name = name;
1127 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1128 lookup, so we can always binary search. */
1129 if (lang == language_cplus)
1131 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1134 modified_name = demangled_name;
1135 make_cleanup (xfree, demangled_name);
1139 /* If we were given a non-mangled name, canonicalize it
1140 according to the language (so far only for C++). */
1141 demangled_name = cp_canonicalize_string (name);
1144 modified_name = demangled_name;
1145 make_cleanup (xfree, demangled_name);
1149 else if (lang == language_java)
1151 demangled_name = cplus_demangle (name,
1152 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1155 modified_name = demangled_name;
1156 make_cleanup (xfree, demangled_name);
1159 else if (lang == language_d)
1161 demangled_name = d_demangle (name, 0);
1164 modified_name = demangled_name;
1165 make_cleanup (xfree, demangled_name);
1168 else if (lang == language_go)
1170 demangled_name = go_demangle (name, 0);
1173 modified_name = demangled_name;
1174 make_cleanup (xfree, demangled_name);
1178 *result_name = modified_name;
1182 /* Find the definition for a specified symbol name NAME
1183 in domain DOMAIN, visible from lexical block BLOCK.
1184 Returns the struct symbol pointer, or zero if no symbol is found.
1185 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1186 NAME is a field of the current implied argument `this'. If so set
1187 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1188 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1189 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1191 /* This function (or rather its subordinates) have a bunch of loops and
1192 it would seem to be attractive to put in some QUIT's (though I'm not really
1193 sure whether it can run long enough to be really important). But there
1194 are a few calls for which it would appear to be bad news to quit
1195 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1196 that there is C++ code below which can error(), but that probably
1197 doesn't affect these calls since they are looking for a known
1198 variable and thus can probably assume it will never hit the C++
1202 lookup_symbol_in_language (const char *name, const struct block *block,
1203 const domain_enum domain, enum language lang,
1204 struct field_of_this_result *is_a_field_of_this)
1206 const char *modified_name;
1207 struct symbol *returnval;
1208 struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name);
1210 returnval = lookup_symbol_aux (modified_name, block, domain, lang,
1211 is_a_field_of_this);
1212 do_cleanups (cleanup);
1217 /* Behave like lookup_symbol_in_language, but performed with the
1218 current language. */
1221 lookup_symbol (const char *name, const struct block *block,
1223 struct field_of_this_result *is_a_field_of_this)
1225 return lookup_symbol_in_language (name, block, domain,
1226 current_language->la_language,
1227 is_a_field_of_this);
1230 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1231 found, or NULL if not found. */
1234 lookup_language_this (const struct language_defn *lang,
1235 const struct block *block)
1237 if (lang->la_name_of_this == NULL || block == NULL)
1244 sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN);
1247 block_found = block;
1250 if (BLOCK_FUNCTION (block))
1252 block = BLOCK_SUPERBLOCK (block);
1258 /* Given TYPE, a structure/union,
1259 return 1 if the component named NAME from the ultimate target
1260 structure/union is defined, otherwise, return 0. */
1263 check_field (struct type *type, const char *name,
1264 struct field_of_this_result *is_a_field_of_this)
1268 /* The type may be a stub. */
1269 CHECK_TYPEDEF (type);
1271 for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
1273 const char *t_field_name = TYPE_FIELD_NAME (type, i);
1275 if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
1277 is_a_field_of_this->type = type;
1278 is_a_field_of_this->field = &TYPE_FIELD (type, i);
1283 /* C++: If it was not found as a data field, then try to return it
1284 as a pointer to a method. */
1286 for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
1288 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0)
1290 is_a_field_of_this->type = type;
1291 is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i);
1296 for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
1297 if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this))
1303 /* Behave like lookup_symbol except that NAME is the natural name
1304 (e.g., demangled name) of the symbol that we're looking for. */
1306 static struct symbol *
1307 lookup_symbol_aux (const char *name, const struct block *block,
1308 const domain_enum domain, enum language language,
1309 struct field_of_this_result *is_a_field_of_this)
1312 const struct language_defn *langdef;
1314 /* Make sure we do something sensible with is_a_field_of_this, since
1315 the callers that set this parameter to some non-null value will
1316 certainly use it later. If we don't set it, the contents of
1317 is_a_field_of_this are undefined. */
1318 if (is_a_field_of_this != NULL)
1319 memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this));
1321 /* Search specified block and its superiors. Don't search
1322 STATIC_BLOCK or GLOBAL_BLOCK. */
1324 sym = lookup_symbol_aux_local (name, block, domain, language);
1328 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1329 check to see if NAME is a field of `this'. */
1331 langdef = language_def (language);
1333 /* Don't do this check if we are searching for a struct. It will
1334 not be found by check_field, but will be found by other
1336 if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN)
1338 struct symbol *sym = lookup_language_this (langdef, block);
1342 struct type *t = sym->type;
1344 /* I'm not really sure that type of this can ever
1345 be typedefed; just be safe. */
1347 if (TYPE_CODE (t) == TYPE_CODE_PTR
1348 || TYPE_CODE (t) == TYPE_CODE_REF)
1349 t = TYPE_TARGET_TYPE (t);
1351 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1352 && TYPE_CODE (t) != TYPE_CODE_UNION)
1353 error (_("Internal error: `%s' is not an aggregate"),
1354 langdef->la_name_of_this);
1356 if (check_field (t, name, is_a_field_of_this))
1361 /* Now do whatever is appropriate for LANGUAGE to look
1362 up static and global variables. */
1364 sym = langdef->la_lookup_symbol_nonlocal (name, block, domain);
1368 /* Now search all static file-level symbols. Not strictly correct,
1369 but more useful than an error. */
1371 return lookup_static_symbol_aux (name, domain);
1374 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1375 first, then check the psymtabs. If a psymtab indicates the existence of the
1376 desired name as a file-level static, then do psymtab-to-symtab conversion on
1377 the fly and return the found symbol. */
1380 lookup_static_symbol_aux (const char *name, const domain_enum domain)
1382 struct objfile *objfile;
1385 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain);
1389 ALL_OBJFILES (objfile)
1391 sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain);
1399 /* Check to see if the symbol is defined in BLOCK or its superiors.
1400 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1402 static struct symbol *
1403 lookup_symbol_aux_local (const char *name, const struct block *block,
1404 const domain_enum domain,
1405 enum language language)
1408 const struct block *static_block = block_static_block (block);
1409 const char *scope = block_scope (block);
1411 /* Check if either no block is specified or it's a global block. */
1413 if (static_block == NULL)
1416 while (block != static_block)
1418 sym = lookup_symbol_aux_block (name, block, domain);
1422 if (language == language_cplus || language == language_fortran)
1424 sym = cp_lookup_symbol_imports_or_template (scope, name, block,
1430 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
1432 block = BLOCK_SUPERBLOCK (block);
1435 /* We've reached the edge of the function without finding a result. */
1440 /* Look up OBJFILE to BLOCK. */
1443 lookup_objfile_from_block (const struct block *block)
1445 struct objfile *obj;
1451 block = block_global_block (block);
1452 /* Go through SYMTABS. */
1453 ALL_SYMTABS (obj, s)
1454 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1456 if (obj->separate_debug_objfile_backlink)
1457 obj = obj->separate_debug_objfile_backlink;
1465 /* Look up a symbol in a block; if found, fixup the symbol, and set
1466 block_found appropriately. */
1469 lookup_symbol_aux_block (const char *name, const struct block *block,
1470 const domain_enum domain)
1474 sym = lookup_block_symbol (block, name, domain);
1477 block_found = block;
1478 return fixup_symbol_section (sym, NULL);
1484 /* Check all global symbols in OBJFILE in symtabs and
1488 lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
1490 const domain_enum domain)
1492 const struct objfile *objfile;
1494 struct blockvector *bv;
1495 const struct block *block;
1498 for (objfile = main_objfile;
1500 objfile = objfile_separate_debug_iterate (main_objfile, objfile))
1502 /* Go through symtabs. */
1503 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1505 bv = BLOCKVECTOR (s);
1506 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1507 sym = lookup_block_symbol (block, name, domain);
1510 block_found = block;
1511 return fixup_symbol_section (sym, (struct objfile *)objfile);
1515 sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK,
1524 /* Check to see if the symbol is defined in one of the OBJFILE's
1525 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1526 depending on whether or not we want to search global symbols or
1529 static struct symbol *
1530 lookup_symbol_aux_objfile (struct objfile *objfile, int block_index,
1531 const char *name, const domain_enum domain)
1533 struct symbol *sym = NULL;
1534 struct blockvector *bv;
1535 const struct block *block;
1538 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1540 bv = BLOCKVECTOR (s);
1541 block = BLOCKVECTOR_BLOCK (bv, block_index);
1542 sym = lookup_block_symbol (block, name, domain);
1545 block_found = block;
1546 return fixup_symbol_section (sym, objfile);
1553 /* Same as lookup_symbol_aux_objfile, except that it searches all
1554 objfiles. Return the first match found. */
1556 static struct symbol *
1557 lookup_symbol_aux_symtabs (int block_index, const char *name,
1558 const domain_enum domain)
1561 struct objfile *objfile;
1563 ALL_OBJFILES (objfile)
1565 sym = lookup_symbol_aux_objfile (objfile, block_index, name, domain);
1573 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1574 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1575 and all related objfiles. */
1577 static struct symbol *
1578 lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
1579 const char *linkage_name,
1582 enum language lang = current_language->la_language;
1583 const char *modified_name;
1584 struct cleanup *cleanup = demangle_for_lookup (linkage_name, lang,
1586 struct objfile *main_objfile, *cur_objfile;
1588 if (objfile->separate_debug_objfile_backlink)
1589 main_objfile = objfile->separate_debug_objfile_backlink;
1591 main_objfile = objfile;
1593 for (cur_objfile = main_objfile;
1595 cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile))
1599 sym = lookup_symbol_aux_objfile (cur_objfile, GLOBAL_BLOCK,
1600 modified_name, domain);
1602 sym = lookup_symbol_aux_objfile (cur_objfile, STATIC_BLOCK,
1603 modified_name, domain);
1606 do_cleanups (cleanup);
1611 do_cleanups (cleanup);
1615 /* A helper function for lookup_symbol_aux that interfaces with the
1616 "quick" symbol table functions. */
1618 static struct symbol *
1619 lookup_symbol_aux_quick (struct objfile *objfile, int kind,
1620 const char *name, const domain_enum domain)
1622 struct symtab *symtab;
1623 struct blockvector *bv;
1624 const struct block *block;
1629 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain);
1633 bv = BLOCKVECTOR (symtab);
1634 block = BLOCKVECTOR_BLOCK (bv, kind);
1635 sym = lookup_block_symbol (block, name, domain);
1638 /* This shouldn't be necessary, but as a last resort try
1639 looking in the statics even though the psymtab claimed
1640 the symbol was global, or vice-versa. It's possible
1641 that the psymtab gets it wrong in some cases. */
1643 /* FIXME: carlton/2002-09-30: Should we really do that?
1644 If that happens, isn't it likely to be a GDB error, in
1645 which case we should fix the GDB error rather than
1646 silently dealing with it here? So I'd vote for
1647 removing the check for the symbol in the other
1649 block = BLOCKVECTOR_BLOCK (bv,
1650 kind == GLOBAL_BLOCK ?
1651 STATIC_BLOCK : GLOBAL_BLOCK);
1652 sym = lookup_block_symbol (block, name, domain);
1655 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1656 %s may be an inlined function, or may be a template function\n\
1657 (if a template, try specifying an instantiation: %s<type>)."),
1658 kind == GLOBAL_BLOCK ? "global" : "static",
1659 name, symtab_to_filename_for_display (symtab), name, name);
1661 return fixup_symbol_section (sym, objfile);
1664 /* A default version of lookup_symbol_nonlocal for use by languages
1665 that can't think of anything better to do. This implements the C
1669 basic_lookup_symbol_nonlocal (const char *name,
1670 const struct block *block,
1671 const domain_enum domain)
1675 /* NOTE: carlton/2003-05-19: The comments below were written when
1676 this (or what turned into this) was part of lookup_symbol_aux;
1677 I'm much less worried about these questions now, since these
1678 decisions have turned out well, but I leave these comments here
1681 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1682 not it would be appropriate to search the current global block
1683 here as well. (That's what this code used to do before the
1684 is_a_field_of_this check was moved up.) On the one hand, it's
1685 redundant with the lookup_symbol_aux_symtabs search that happens
1686 next. On the other hand, if decode_line_1 is passed an argument
1687 like filename:var, then the user presumably wants 'var' to be
1688 searched for in filename. On the third hand, there shouldn't be
1689 multiple global variables all of which are named 'var', and it's
1690 not like decode_line_1 has ever restricted its search to only
1691 global variables in a single filename. All in all, only
1692 searching the static block here seems best: it's correct and it's
1695 /* NOTE: carlton/2002-12-05: There's also a possible performance
1696 issue here: if you usually search for global symbols in the
1697 current file, then it would be slightly better to search the
1698 current global block before searching all the symtabs. But there
1699 are other factors that have a much greater effect on performance
1700 than that one, so I don't think we should worry about that for
1703 sym = lookup_symbol_static (name, block, domain);
1707 return lookup_symbol_global (name, block, domain);
1710 /* Lookup a symbol in the static block associated to BLOCK, if there
1711 is one; do nothing if BLOCK is NULL or a global block. */
1714 lookup_symbol_static (const char *name,
1715 const struct block *block,
1716 const domain_enum domain)
1718 const struct block *static_block = block_static_block (block);
1720 if (static_block != NULL)
1721 return lookup_symbol_aux_block (name, static_block, domain);
1726 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1728 struct global_sym_lookup_data
1730 /* The name of the symbol we are searching for. */
1733 /* The domain to use for our search. */
1736 /* The field where the callback should store the symbol if found.
1737 It should be initialized to NULL before the search is started. */
1738 struct symbol *result;
1741 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1742 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1743 OBJFILE. The arguments for the search are passed via CB_DATA,
1744 which in reality is a pointer to struct global_sym_lookup_data. */
1747 lookup_symbol_global_iterator_cb (struct objfile *objfile,
1750 struct global_sym_lookup_data *data =
1751 (struct global_sym_lookup_data *) cb_data;
1753 gdb_assert (data->result == NULL);
1755 data->result = lookup_symbol_aux_objfile (objfile, GLOBAL_BLOCK,
1756 data->name, data->domain);
1757 if (data->result == NULL)
1758 data->result = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK,
1759 data->name, data->domain);
1761 /* If we found a match, tell the iterator to stop. Otherwise,
1763 return (data->result != NULL);
1766 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1770 lookup_symbol_global (const char *name,
1771 const struct block *block,
1772 const domain_enum domain)
1774 struct symbol *sym = NULL;
1775 struct objfile *objfile = NULL;
1776 struct global_sym_lookup_data lookup_data;
1778 /* Call library-specific lookup procedure. */
1779 objfile = lookup_objfile_from_block (block);
1780 if (objfile != NULL)
1781 sym = solib_global_lookup (objfile, name, domain);
1785 memset (&lookup_data, 0, sizeof (lookup_data));
1786 lookup_data.name = name;
1787 lookup_data.domain = domain;
1788 gdbarch_iterate_over_objfiles_in_search_order
1789 (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (),
1790 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
1792 return lookup_data.result;
1796 symbol_matches_domain (enum language symbol_language,
1797 domain_enum symbol_domain,
1800 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1801 A Java class declaration also defines a typedef for the class.
1802 Similarly, any Ada type declaration implicitly defines a typedef. */
1803 if (symbol_language == language_cplus
1804 || symbol_language == language_d
1805 || symbol_language == language_java
1806 || symbol_language == language_ada)
1808 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1809 && symbol_domain == STRUCT_DOMAIN)
1812 /* For all other languages, strict match is required. */
1813 return (symbol_domain == domain);
1816 /* Look up a type named NAME in the struct_domain. The type returned
1817 must not be opaque -- i.e., must have at least one field
1821 lookup_transparent_type (const char *name)
1823 return current_language->la_lookup_transparent_type (name);
1826 /* A helper for basic_lookup_transparent_type that interfaces with the
1827 "quick" symbol table functions. */
1829 static struct type *
1830 basic_lookup_transparent_type_quick (struct objfile *objfile, int kind,
1833 struct symtab *symtab;
1834 struct blockvector *bv;
1835 struct block *block;
1840 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN);
1844 bv = BLOCKVECTOR (symtab);
1845 block = BLOCKVECTOR_BLOCK (bv, kind);
1846 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1849 int other_kind = kind == GLOBAL_BLOCK ? STATIC_BLOCK : GLOBAL_BLOCK;
1851 /* This shouldn't be necessary, but as a last resort
1852 * try looking in the 'other kind' even though the psymtab
1853 * claimed the symbol was one thing. It's possible that
1854 * the psymtab gets it wrong in some cases.
1856 block = BLOCKVECTOR_BLOCK (bv, other_kind);
1857 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1859 /* FIXME; error is wrong in one case. */
1861 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1862 %s may be an inlined function, or may be a template function\n\
1863 (if a template, try specifying an instantiation: %s<type>)."),
1864 name, symtab_to_filename_for_display (symtab), name, name);
1866 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1867 return SYMBOL_TYPE (sym);
1872 /* The standard implementation of lookup_transparent_type. This code
1873 was modeled on lookup_symbol -- the parts not relevant to looking
1874 up types were just left out. In particular it's assumed here that
1875 types are available in struct_domain and only at file-static or
1879 basic_lookup_transparent_type (const char *name)
1882 struct symtab *s = NULL;
1883 struct blockvector *bv;
1884 struct objfile *objfile;
1885 struct block *block;
1888 /* Now search all the global symbols. Do the symtab's first, then
1889 check the psymtab's. If a psymtab indicates the existence
1890 of the desired name as a global, then do psymtab-to-symtab
1891 conversion on the fly and return the found symbol. */
1893 ALL_OBJFILES (objfile)
1895 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1897 bv = BLOCKVECTOR (s);
1898 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1899 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1900 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1902 return SYMBOL_TYPE (sym);
1907 ALL_OBJFILES (objfile)
1909 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
1914 /* Now search the static file-level symbols.
1915 Not strictly correct, but more useful than an error.
1916 Do the symtab's first, then
1917 check the psymtab's. If a psymtab indicates the existence
1918 of the desired name as a file-level static, then do psymtab-to-symtab
1919 conversion on the fly and return the found symbol. */
1921 ALL_OBJFILES (objfile)
1923 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1925 bv = BLOCKVECTOR (s);
1926 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1927 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1928 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1930 return SYMBOL_TYPE (sym);
1935 ALL_OBJFILES (objfile)
1937 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
1942 return (struct type *) 0;
1945 /* Find the name of the file containing main(). */
1946 /* FIXME: What about languages without main() or specially linked
1947 executables that have no main() ? */
1950 find_main_filename (void)
1952 struct objfile *objfile;
1953 char *name = main_name ();
1955 ALL_OBJFILES (objfile)
1961 result = objfile->sf->qf->find_symbol_file (objfile, name);
1968 /* Search BLOCK for symbol NAME in DOMAIN.
1970 Note that if NAME is the demangled form of a C++ symbol, we will fail
1971 to find a match during the binary search of the non-encoded names, but
1972 for now we don't worry about the slight inefficiency of looking for
1973 a match we'll never find, since it will go pretty quick. Once the
1974 binary search terminates, we drop through and do a straight linear
1975 search on the symbols. Each symbol which is marked as being a ObjC/C++
1976 symbol (language_cplus or language_objc set) has both the encoded and
1977 non-encoded names tested for a match. */
1980 lookup_block_symbol (const struct block *block, const char *name,
1981 const domain_enum domain)
1983 struct block_iterator iter;
1986 if (!BLOCK_FUNCTION (block))
1988 for (sym = block_iter_name_first (block, name, &iter);
1990 sym = block_iter_name_next (name, &iter))
1992 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1993 SYMBOL_DOMAIN (sym), domain))
2000 /* Note that parameter symbols do not always show up last in the
2001 list; this loop makes sure to take anything else other than
2002 parameter symbols first; it only uses parameter symbols as a
2003 last resort. Note that this only takes up extra computation
2006 struct symbol *sym_found = NULL;
2008 for (sym = block_iter_name_first (block, name, &iter);
2010 sym = block_iter_name_next (name, &iter))
2012 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2013 SYMBOL_DOMAIN (sym), domain))
2016 if (!SYMBOL_IS_ARGUMENT (sym))
2022 return (sym_found); /* Will be NULL if not found. */
2026 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
2029 For each symbol that matches, CALLBACK is called. The symbol and
2030 DATA are passed to the callback.
2032 If CALLBACK returns zero, the iteration ends. Otherwise, the
2033 search continues. This function iterates upward through blocks.
2034 When the outermost block has been finished, the function
2038 iterate_over_symbols (const struct block *block, const char *name,
2039 const domain_enum domain,
2040 symbol_found_callback_ftype *callback,
2045 struct block_iterator iter;
2048 for (sym = block_iter_name_first (block, name, &iter);
2050 sym = block_iter_name_next (name, &iter))
2052 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2053 SYMBOL_DOMAIN (sym), domain))
2055 if (!callback (sym, data))
2060 block = BLOCK_SUPERBLOCK (block);
2064 /* Find the symtab associated with PC and SECTION. Look through the
2065 psymtabs and read in another symtab if necessary. */
2068 find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
2071 struct blockvector *bv;
2072 struct symtab *s = NULL;
2073 struct symtab *best_s = NULL;
2074 struct objfile *objfile;
2075 CORE_ADDR distance = 0;
2076 struct minimal_symbol *msymbol;
2078 /* If we know that this is not a text address, return failure. This is
2079 necessary because we loop based on the block's high and low code
2080 addresses, which do not include the data ranges, and because
2081 we call find_pc_sect_psymtab which has a similar restriction based
2082 on the partial_symtab's texthigh and textlow. */
2083 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
2085 && (MSYMBOL_TYPE (msymbol) == mst_data
2086 || MSYMBOL_TYPE (msymbol) == mst_bss
2087 || MSYMBOL_TYPE (msymbol) == mst_abs
2088 || MSYMBOL_TYPE (msymbol) == mst_file_data
2089 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
2092 /* Search all symtabs for the one whose file contains our address, and which
2093 is the smallest of all the ones containing the address. This is designed
2094 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2095 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2096 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2098 This happens for native ecoff format, where code from included files
2099 gets its own symtab. The symtab for the included file should have
2100 been read in already via the dependency mechanism.
2101 It might be swifter to create several symtabs with the same name
2102 like xcoff does (I'm not sure).
2104 It also happens for objfiles that have their functions reordered.
2105 For these, the symtab we are looking for is not necessarily read in. */
2107 ALL_PRIMARY_SYMTABS (objfile, s)
2109 bv = BLOCKVECTOR (s);
2110 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2112 if (BLOCK_START (b) <= pc
2113 && BLOCK_END (b) > pc
2115 || BLOCK_END (b) - BLOCK_START (b) < distance))
2117 /* For an objfile that has its functions reordered,
2118 find_pc_psymtab will find the proper partial symbol table
2119 and we simply return its corresponding symtab. */
2120 /* In order to better support objfiles that contain both
2121 stabs and coff debugging info, we continue on if a psymtab
2123 if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
2125 struct symtab *result;
2128 = objfile->sf->qf->find_pc_sect_symtab (objfile,
2137 struct block_iterator iter;
2138 struct symbol *sym = NULL;
2140 ALL_BLOCK_SYMBOLS (b, iter, sym)
2142 fixup_symbol_section (sym, objfile);
2143 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
2147 continue; /* No symbol in this symtab matches
2150 distance = BLOCK_END (b) - BLOCK_START (b);
2158 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2160 ALL_OBJFILES (objfile)
2162 struct symtab *result;
2166 result = objfile->sf->qf->find_pc_sect_symtab (objfile,
2177 /* Find the symtab associated with PC. Look through the psymtabs and read
2178 in another symtab if necessary. Backward compatibility, no section. */
2181 find_pc_symtab (CORE_ADDR pc)
2183 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2187 /* Find the source file and line number for a given PC value and SECTION.
2188 Return a structure containing a symtab pointer, a line number,
2189 and a pc range for the entire source line.
2190 The value's .pc field is NOT the specified pc.
2191 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2192 use the line that ends there. Otherwise, in that case, the line
2193 that begins there is used. */
2195 /* The big complication here is that a line may start in one file, and end just
2196 before the start of another file. This usually occurs when you #include
2197 code in the middle of a subroutine. To properly find the end of a line's PC
2198 range, we must search all symtabs associated with this compilation unit, and
2199 find the one whose first PC is closer than that of the next line in this
2202 /* If it's worth the effort, we could be using a binary search. */
2204 struct symtab_and_line
2205 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
2208 struct linetable *l;
2211 struct linetable_entry *item;
2212 struct symtab_and_line val;
2213 struct blockvector *bv;
2214 struct minimal_symbol *msymbol;
2215 struct minimal_symbol *mfunsym;
2216 struct objfile *objfile;
2218 /* Info on best line seen so far, and where it starts, and its file. */
2220 struct linetable_entry *best = NULL;
2221 CORE_ADDR best_end = 0;
2222 struct symtab *best_symtab = 0;
2224 /* Store here the first line number
2225 of a file which contains the line at the smallest pc after PC.
2226 If we don't find a line whose range contains PC,
2227 we will use a line one less than this,
2228 with a range from the start of that file to the first line's pc. */
2229 struct linetable_entry *alt = NULL;
2231 /* Info on best line seen in this file. */
2233 struct linetable_entry *prev;
2235 /* If this pc is not from the current frame,
2236 it is the address of the end of a call instruction.
2237 Quite likely that is the start of the following statement.
2238 But what we want is the statement containing the instruction.
2239 Fudge the pc to make sure we get that. */
2241 init_sal (&val); /* initialize to zeroes */
2243 val.pspace = current_program_space;
2245 /* It's tempting to assume that, if we can't find debugging info for
2246 any function enclosing PC, that we shouldn't search for line
2247 number info, either. However, GAS can emit line number info for
2248 assembly files --- very helpful when debugging hand-written
2249 assembly code. In such a case, we'd have no debug info for the
2250 function, but we would have line info. */
2255 /* elz: added this because this function returned the wrong
2256 information if the pc belongs to a stub (import/export)
2257 to call a shlib function. This stub would be anywhere between
2258 two functions in the target, and the line info was erroneously
2259 taken to be the one of the line before the pc. */
2261 /* RT: Further explanation:
2263 * We have stubs (trampolines) inserted between procedures.
2265 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2266 * exists in the main image.
2268 * In the minimal symbol table, we have a bunch of symbols
2269 * sorted by start address. The stubs are marked as "trampoline",
2270 * the others appear as text. E.g.:
2272 * Minimal symbol table for main image
2273 * main: code for main (text symbol)
2274 * shr1: stub (trampoline symbol)
2275 * foo: code for foo (text symbol)
2277 * Minimal symbol table for "shr1" image:
2279 * shr1: code for shr1 (text symbol)
2282 * So the code below is trying to detect if we are in the stub
2283 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2284 * and if found, do the symbolization from the real-code address
2285 * rather than the stub address.
2287 * Assumptions being made about the minimal symbol table:
2288 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2289 * if we're really in the trampoline.s If we're beyond it (say
2290 * we're in "foo" in the above example), it'll have a closer
2291 * symbol (the "foo" text symbol for example) and will not
2292 * return the trampoline.
2293 * 2. lookup_minimal_symbol_text() will find a real text symbol
2294 * corresponding to the trampoline, and whose address will
2295 * be different than the trampoline address. I put in a sanity
2296 * check for the address being the same, to avoid an
2297 * infinite recursion.
2299 msymbol = lookup_minimal_symbol_by_pc (pc);
2300 if (msymbol != NULL)
2301 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2303 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2305 if (mfunsym == NULL)
2306 /* I eliminated this warning since it is coming out
2307 * in the following situation:
2308 * gdb shmain // test program with shared libraries
2309 * (gdb) break shr1 // function in shared lib
2310 * Warning: In stub for ...
2311 * In the above situation, the shared lib is not loaded yet,
2312 * so of course we can't find the real func/line info,
2313 * but the "break" still works, and the warning is annoying.
2314 * So I commented out the warning. RT */
2315 /* warning ("In stub for %s; unable to find real function/line info",
2316 SYMBOL_LINKAGE_NAME (msymbol)); */
2319 else if (SYMBOL_VALUE_ADDRESS (mfunsym)
2320 == SYMBOL_VALUE_ADDRESS (msymbol))
2321 /* Avoid infinite recursion */
2322 /* See above comment about why warning is commented out. */
2323 /* warning ("In stub for %s; unable to find real function/line info",
2324 SYMBOL_LINKAGE_NAME (msymbol)); */
2328 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2332 s = find_pc_sect_symtab (pc, section);
2335 /* If no symbol information, return previous pc. */
2342 bv = BLOCKVECTOR (s);
2343 objfile = s->objfile;
2345 /* Look at all the symtabs that share this blockvector.
2346 They all have the same apriori range, that we found was right;
2347 but they have different line tables. */
2349 ALL_OBJFILE_SYMTABS (objfile, s)
2351 if (BLOCKVECTOR (s) != bv)
2354 /* Find the best line in this symtab. */
2361 /* I think len can be zero if the symtab lacks line numbers
2362 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2363 I'm not sure which, and maybe it depends on the symbol
2369 item = l->item; /* Get first line info. */
2371 /* Is this file's first line closer than the first lines of other files?
2372 If so, record this file, and its first line, as best alternate. */
2373 if (item->pc > pc && (!alt || item->pc < alt->pc))
2376 for (i = 0; i < len; i++, item++)
2378 /* Leave prev pointing to the linetable entry for the last line
2379 that started at or before PC. */
2386 /* At this point, prev points at the line whose start addr is <= pc, and
2387 item points at the next line. If we ran off the end of the linetable
2388 (pc >= start of the last line), then prev == item. If pc < start of
2389 the first line, prev will not be set. */
2391 /* Is this file's best line closer than the best in the other files?
2392 If so, record this file, and its best line, as best so far. Don't
2393 save prev if it represents the end of a function (i.e. line number
2394 0) instead of a real line. */
2396 if (prev && prev->line && (!best || prev->pc > best->pc))
2401 /* Discard BEST_END if it's before the PC of the current BEST. */
2402 if (best_end <= best->pc)
2406 /* If another line (denoted by ITEM) is in the linetable and its
2407 PC is after BEST's PC, but before the current BEST_END, then
2408 use ITEM's PC as the new best_end. */
2409 if (best && i < len && item->pc > best->pc
2410 && (best_end == 0 || best_end > item->pc))
2411 best_end = item->pc;
2416 /* If we didn't find any line number info, just return zeros.
2417 We used to return alt->line - 1 here, but that could be
2418 anywhere; if we don't have line number info for this PC,
2419 don't make some up. */
2422 else if (best->line == 0)
2424 /* If our best fit is in a range of PC's for which no line
2425 number info is available (line number is zero) then we didn't
2426 find any valid line information. */
2431 val.symtab = best_symtab;
2432 val.line = best->line;
2434 if (best_end && (!alt || best_end < alt->pc))
2439 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2441 val.section = section;
2445 /* Backward compatibility (no section). */
2447 struct symtab_and_line
2448 find_pc_line (CORE_ADDR pc, int notcurrent)
2450 struct obj_section *section;
2452 section = find_pc_overlay (pc);
2453 if (pc_in_unmapped_range (pc, section))
2454 pc = overlay_mapped_address (pc, section);
2455 return find_pc_sect_line (pc, section, notcurrent);
2458 /* Find line number LINE in any symtab whose name is the same as
2461 If found, return the symtab that contains the linetable in which it was
2462 found, set *INDEX to the index in the linetable of the best entry
2463 found, and set *EXACT_MATCH nonzero if the value returned is an
2466 If not found, return NULL. */
2469 find_line_symtab (struct symtab *symtab, int line,
2470 int *index, int *exact_match)
2472 int exact = 0; /* Initialized here to avoid a compiler warning. */
2474 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2478 struct linetable *best_linetable;
2479 struct symtab *best_symtab;
2481 /* First try looking it up in the given symtab. */
2482 best_linetable = LINETABLE (symtab);
2483 best_symtab = symtab;
2484 best_index = find_line_common (best_linetable, line, &exact, 0);
2485 if (best_index < 0 || !exact)
2487 /* Didn't find an exact match. So we better keep looking for
2488 another symtab with the same name. In the case of xcoff,
2489 multiple csects for one source file (produced by IBM's FORTRAN
2490 compiler) produce multiple symtabs (this is unavoidable
2491 assuming csects can be at arbitrary places in memory and that
2492 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2494 /* BEST is the smallest linenumber > LINE so far seen,
2495 or 0 if none has been seen so far.
2496 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2499 struct objfile *objfile;
2502 if (best_index >= 0)
2503 best = best_linetable->item[best_index].line;
2507 ALL_OBJFILES (objfile)
2510 objfile->sf->qf->expand_symtabs_with_fullname (objfile,
2511 symtab_to_fullname (symtab));
2514 ALL_SYMTABS (objfile, s)
2516 struct linetable *l;
2519 if (FILENAME_CMP (symtab->filename, s->filename) != 0)
2521 if (FILENAME_CMP (symtab_to_fullname (symtab),
2522 symtab_to_fullname (s)) != 0)
2525 ind = find_line_common (l, line, &exact, 0);
2535 if (best == 0 || l->item[ind].line < best)
2537 best = l->item[ind].line;
2550 *index = best_index;
2552 *exact_match = exact;
2557 /* Given SYMTAB, returns all the PCs function in the symtab that
2558 exactly match LINE. Returns NULL if there are no exact matches,
2559 but updates BEST_ITEM in this case. */
2562 find_pcs_for_symtab_line (struct symtab *symtab, int line,
2563 struct linetable_entry **best_item)
2566 VEC (CORE_ADDR) *result = NULL;
2568 /* First, collect all the PCs that are at this line. */
2574 idx = find_line_common (LINETABLE (symtab), line, &was_exact, start);
2580 struct linetable_entry *item = &LINETABLE (symtab)->item[idx];
2582 if (*best_item == NULL || item->line < (*best_item)->line)
2588 VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc);
2596 /* Set the PC value for a given source file and line number and return true.
2597 Returns zero for invalid line number (and sets the PC to 0).
2598 The source file is specified with a struct symtab. */
2601 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2603 struct linetable *l;
2610 symtab = find_line_symtab (symtab, line, &ind, NULL);
2613 l = LINETABLE (symtab);
2614 *pc = l->item[ind].pc;
2621 /* Find the range of pc values in a line.
2622 Store the starting pc of the line into *STARTPTR
2623 and the ending pc (start of next line) into *ENDPTR.
2624 Returns 1 to indicate success.
2625 Returns 0 if could not find the specified line. */
2628 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2631 CORE_ADDR startaddr;
2632 struct symtab_and_line found_sal;
2635 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2638 /* This whole function is based on address. For example, if line 10 has
2639 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2640 "info line *0x123" should say the line goes from 0x100 to 0x200
2641 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2642 This also insures that we never give a range like "starts at 0x134
2643 and ends at 0x12c". */
2645 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2646 if (found_sal.line != sal.line)
2648 /* The specified line (sal) has zero bytes. */
2649 *startptr = found_sal.pc;
2650 *endptr = found_sal.pc;
2654 *startptr = found_sal.pc;
2655 *endptr = found_sal.end;
2660 /* Given a line table and a line number, return the index into the line
2661 table for the pc of the nearest line whose number is >= the specified one.
2662 Return -1 if none is found. The value is >= 0 if it is an index.
2663 START is the index at which to start searching the line table.
2665 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2668 find_line_common (struct linetable *l, int lineno,
2669 int *exact_match, int start)
2674 /* BEST is the smallest linenumber > LINENO so far seen,
2675 or 0 if none has been seen so far.
2676 BEST_INDEX identifies the item for it. */
2678 int best_index = -1;
2689 for (i = start; i < len; i++)
2691 struct linetable_entry *item = &(l->item[i]);
2693 if (item->line == lineno)
2695 /* Return the first (lowest address) entry which matches. */
2700 if (item->line > lineno && (best == 0 || item->line < best))
2707 /* If we got here, we didn't get an exact match. */
2712 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2714 struct symtab_and_line sal;
2716 sal = find_pc_line (pc, 0);
2719 return sal.symtab != 0;
2722 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2723 address for that function that has an entry in SYMTAB's line info
2724 table. If such an entry cannot be found, return FUNC_ADDR
2728 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
2730 CORE_ADDR func_start, func_end;
2731 struct linetable *l;
2734 /* Give up if this symbol has no lineinfo table. */
2735 l = LINETABLE (symtab);
2739 /* Get the range for the function's PC values, or give up if we
2740 cannot, for some reason. */
2741 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
2744 /* Linetable entries are ordered by PC values, see the commentary in
2745 symtab.h where `struct linetable' is defined. Thus, the first
2746 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2747 address we are looking for. */
2748 for (i = 0; i < l->nitems; i++)
2750 struct linetable_entry *item = &(l->item[i]);
2752 /* Don't use line numbers of zero, they mark special entries in
2753 the table. See the commentary on symtab.h before the
2754 definition of struct linetable. */
2755 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
2762 /* Given a function symbol SYM, find the symtab and line for the start
2764 If the argument FUNFIRSTLINE is nonzero, we want the first line
2765 of real code inside the function. */
2767 struct symtab_and_line
2768 find_function_start_sal (struct symbol *sym, int funfirstline)
2770 struct symtab_and_line sal;
2772 fixup_symbol_section (sym, NULL);
2773 sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
2774 SYMBOL_OBJ_SECTION (sym), 0);
2776 /* We always should have a line for the function start address.
2777 If we don't, something is odd. Create a plain SAL refering
2778 just the PC and hope that skip_prologue_sal (if requested)
2779 can find a line number for after the prologue. */
2780 if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym)))
2783 sal.pspace = current_program_space;
2784 sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2785 sal.section = SYMBOL_OBJ_SECTION (sym);
2789 skip_prologue_sal (&sal);
2794 /* Adjust SAL to the first instruction past the function prologue.
2795 If the PC was explicitly specified, the SAL is not changed.
2796 If the line number was explicitly specified, at most the SAL's PC
2797 is updated. If SAL is already past the prologue, then do nothing. */
2800 skip_prologue_sal (struct symtab_and_line *sal)
2803 struct symtab_and_line start_sal;
2804 struct cleanup *old_chain;
2805 CORE_ADDR pc, saved_pc;
2806 struct obj_section *section;
2808 struct objfile *objfile;
2809 struct gdbarch *gdbarch;
2810 struct block *b, *function_block;
2811 int force_skip, skip;
2813 /* Do not change the SAL if PC was specified explicitly. */
2814 if (sal->explicit_pc)
2817 old_chain = save_current_space_and_thread ();
2818 switch_to_program_space_and_thread (sal->pspace);
2820 sym = find_pc_sect_function (sal->pc, sal->section);
2823 fixup_symbol_section (sym, NULL);
2825 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2826 section = SYMBOL_OBJ_SECTION (sym);
2827 name = SYMBOL_LINKAGE_NAME (sym);
2828 objfile = SYMBOL_SYMTAB (sym)->objfile;
2832 struct minimal_symbol *msymbol
2833 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
2835 if (msymbol == NULL)
2837 do_cleanups (old_chain);
2841 pc = SYMBOL_VALUE_ADDRESS (msymbol);
2842 section = SYMBOL_OBJ_SECTION (msymbol);
2843 name = SYMBOL_LINKAGE_NAME (msymbol);
2844 objfile = msymbol_objfile (msymbol);
2847 gdbarch = get_objfile_arch (objfile);
2849 /* Process the prologue in two passes. In the first pass try to skip the
2850 prologue (SKIP is true) and verify there is a real need for it (indicated
2851 by FORCE_SKIP). If no such reason was found run a second pass where the
2852 prologue is not skipped (SKIP is false). */
2857 /* Be conservative - allow direct PC (without skipping prologue) only if we
2858 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2859 have to be set by the caller so we use SYM instead. */
2860 if (sym && SYMBOL_SYMTAB (sym)->locations_valid)
2868 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2869 so that gdbarch_skip_prologue has something unique to work on. */
2870 if (section_is_overlay (section) && !section_is_mapped (section))
2871 pc = overlay_unmapped_address (pc, section);
2873 /* Skip "first line" of function (which is actually its prologue). */
2874 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2876 pc = gdbarch_skip_prologue (gdbarch, pc);
2878 /* For overlays, map pc back into its mapped VMA range. */
2879 pc = overlay_mapped_address (pc, section);
2881 /* Calculate line number. */
2882 start_sal = find_pc_sect_line (pc, section, 0);
2884 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2885 line is still part of the same function. */
2886 if (skip && start_sal.pc != pc
2887 && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
2888 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2889 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section)
2890 == lookup_minimal_symbol_by_pc_section (pc, section))))
2892 /* First pc of next line */
2894 /* Recalculate the line number (might not be N+1). */
2895 start_sal = find_pc_sect_line (pc, section, 0);
2898 /* On targets with executable formats that don't have a concept of
2899 constructors (ELF with .init has, PE doesn't), gcc emits a call
2900 to `__main' in `main' between the prologue and before user
2902 if (gdbarch_skip_main_prologue_p (gdbarch)
2903 && name && strcmp_iw (name, "main") == 0)
2905 pc = gdbarch_skip_main_prologue (gdbarch, pc);
2906 /* Recalculate the line number (might not be N+1). */
2907 start_sal = find_pc_sect_line (pc, section, 0);
2911 while (!force_skip && skip--);
2913 /* If we still don't have a valid source line, try to find the first
2914 PC in the lineinfo table that belongs to the same function. This
2915 happens with COFF debug info, which does not seem to have an
2916 entry in lineinfo table for the code after the prologue which has
2917 no direct relation to source. For example, this was found to be
2918 the case with the DJGPP target using "gcc -gcoff" when the
2919 compiler inserted code after the prologue to make sure the stack
2921 if (!force_skip && sym && start_sal.symtab == NULL)
2923 pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
2924 /* Recalculate the line number. */
2925 start_sal = find_pc_sect_line (pc, section, 0);
2928 do_cleanups (old_chain);
2930 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2931 forward SAL to the end of the prologue. */
2936 sal->section = section;
2938 /* Unless the explicit_line flag was set, update the SAL line
2939 and symtab to correspond to the modified PC location. */
2940 if (sal->explicit_line)
2943 sal->symtab = start_sal.symtab;
2944 sal->line = start_sal.line;
2945 sal->end = start_sal.end;
2947 /* Check if we are now inside an inlined function. If we can,
2948 use the call site of the function instead. */
2949 b = block_for_pc_sect (sal->pc, sal->section);
2950 function_block = NULL;
2953 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
2955 else if (BLOCK_FUNCTION (b) != NULL)
2957 b = BLOCK_SUPERBLOCK (b);
2959 if (function_block != NULL
2960 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
2962 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
2963 sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
2967 /* If P is of the form "operator[ \t]+..." where `...' is
2968 some legitimate operator text, return a pointer to the
2969 beginning of the substring of the operator text.
2970 Otherwise, return "". */
2973 operator_chars (char *p, char **end)
2976 if (strncmp (p, "operator", 8))
2980 /* Don't get faked out by `operator' being part of a longer
2982 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2985 /* Allow some whitespace between `operator' and the operator symbol. */
2986 while (*p == ' ' || *p == '\t')
2989 /* Recognize 'operator TYPENAME'. */
2991 if (isalpha (*p) || *p == '_' || *p == '$')
2995 while (isalnum (*q) || *q == '_' || *q == '$')
3004 case '\\': /* regexp quoting */
3007 if (p[2] == '=') /* 'operator\*=' */
3009 else /* 'operator\*' */
3013 else if (p[1] == '[')
3016 error (_("mismatched quoting on brackets, "
3017 "try 'operator\\[\\]'"));
3018 else if (p[2] == '\\' && p[3] == ']')
3020 *end = p + 4; /* 'operator\[\]' */
3024 error (_("nothing is allowed between '[' and ']'"));
3028 /* Gratuitous qoute: skip it and move on. */
3050 if (p[0] == '-' && p[1] == '>')
3052 /* Struct pointer member operator 'operator->'. */
3055 *end = p + 3; /* 'operator->*' */
3058 else if (p[2] == '\\')
3060 *end = p + 4; /* Hopefully 'operator->\*' */
3065 *end = p + 2; /* 'operator->' */
3069 if (p[1] == '=' || p[1] == p[0])
3080 error (_("`operator ()' must be specified "
3081 "without whitespace in `()'"));
3086 error (_("`operator ?:' must be specified "
3087 "without whitespace in `?:'"));
3092 error (_("`operator []' must be specified "
3093 "without whitespace in `[]'"));
3097 error (_("`operator %s' not supported"), p);
3106 /* Cache to watch for file names already seen by filename_seen. */
3108 struct filename_seen_cache
3110 /* Table of files seen so far. */
3112 /* Initial size of the table. It automagically grows from here. */
3113 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3116 /* filename_seen_cache constructor. */
3118 static struct filename_seen_cache *
3119 create_filename_seen_cache (void)
3121 struct filename_seen_cache *cache;
3123 cache = XNEW (struct filename_seen_cache);
3124 cache->tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE,
3125 filename_hash, filename_eq,
3126 NULL, xcalloc, xfree);
3131 /* Empty the cache, but do not delete it. */
3134 clear_filename_seen_cache (struct filename_seen_cache *cache)
3136 htab_empty (cache->tab);
3139 /* filename_seen_cache destructor.
3140 This takes a void * argument as it is generally used as a cleanup. */
3143 delete_filename_seen_cache (void *ptr)
3145 struct filename_seen_cache *cache = ptr;
3147 htab_delete (cache->tab);
3151 /* If FILE is not already in the table of files in CACHE, return zero;
3152 otherwise return non-zero. Optionally add FILE to the table if ADD
3155 NOTE: We don't manage space for FILE, we assume FILE lives as long
3156 as the caller needs. */
3159 filename_seen (struct filename_seen_cache *cache, const char *file, int add)
3163 /* Is FILE in tab? */
3164 slot = htab_find_slot (cache->tab, file, add ? INSERT : NO_INSERT);
3168 /* No; maybe add it to tab. */
3170 *slot = (char *) file;
3175 /* Data structure to maintain printing state for output_source_filename. */
3177 struct output_source_filename_data
3179 /* Cache of what we've seen so far. */
3180 struct filename_seen_cache *filename_seen_cache;
3182 /* Flag of whether we're printing the first one. */
3186 /* Slave routine for sources_info. Force line breaks at ,'s.
3187 NAME is the name to print.
3188 DATA contains the state for printing and watching for duplicates. */
3191 output_source_filename (const char *name,
3192 struct output_source_filename_data *data)
3194 /* Since a single source file can result in several partial symbol
3195 tables, we need to avoid printing it more than once. Note: if
3196 some of the psymtabs are read in and some are not, it gets
3197 printed both under "Source files for which symbols have been
3198 read" and "Source files for which symbols will be read in on
3199 demand". I consider this a reasonable way to deal with the
3200 situation. I'm not sure whether this can also happen for
3201 symtabs; it doesn't hurt to check. */
3203 /* Was NAME already seen? */
3204 if (filename_seen (data->filename_seen_cache, name, 1))
3206 /* Yes; don't print it again. */
3210 /* No; print it and reset *FIRST. */
3212 printf_filtered (", ");
3216 fputs_filtered (name, gdb_stdout);
3219 /* A callback for map_partial_symbol_filenames. */
3222 output_partial_symbol_filename (const char *filename, const char *fullname,
3225 output_source_filename (fullname ? fullname : filename, data);
3229 sources_info (char *ignore, int from_tty)
3232 struct objfile *objfile;
3233 struct output_source_filename_data data;
3234 struct cleanup *cleanups;
3236 if (!have_full_symbols () && !have_partial_symbols ())
3238 error (_("No symbol table is loaded. Use the \"file\" command."));
3241 data.filename_seen_cache = create_filename_seen_cache ();
3242 cleanups = make_cleanup (delete_filename_seen_cache,
3243 data.filename_seen_cache);
3245 printf_filtered ("Source files for which symbols have been read in:\n\n");
3248 ALL_SYMTABS (objfile, s)
3250 const char *fullname = symtab_to_fullname (s);
3252 output_source_filename (fullname, &data);
3254 printf_filtered ("\n\n");
3256 printf_filtered ("Source files for which symbols "
3257 "will be read in on demand:\n\n");
3259 clear_filename_seen_cache (data.filename_seen_cache);
3261 map_partial_symbol_filenames (output_partial_symbol_filename, &data,
3262 1 /*need_fullname*/);
3263 printf_filtered ("\n");
3265 do_cleanups (cleanups);
3269 file_matches (const char *file, char *files[], int nfiles)
3273 if (file != NULL && nfiles != 0)
3275 for (i = 0; i < nfiles; i++)
3277 if (compare_filenames_for_search (file, files[i]))
3281 else if (nfiles == 0)
3286 /* Free any memory associated with a search. */
3289 free_search_symbols (struct symbol_search *symbols)
3291 struct symbol_search *p;
3292 struct symbol_search *next;
3294 for (p = symbols; p != NULL; p = next)
3302 do_free_search_symbols_cleanup (void *symbols)
3304 free_search_symbols (symbols);
3308 make_cleanup_free_search_symbols (struct symbol_search *symbols)
3310 return make_cleanup (do_free_search_symbols_cleanup, symbols);
3313 /* Helper function for sort_search_symbols and qsort. Can only
3314 sort symbols, not minimal symbols. */
3317 compare_search_syms (const void *sa, const void *sb)
3319 struct symbol_search **sym_a = (struct symbol_search **) sa;
3320 struct symbol_search **sym_b = (struct symbol_search **) sb;
3322 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
3323 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
3326 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3327 prevtail where it is, but update its next pointer to point to
3328 the first of the sorted symbols. */
3330 static struct symbol_search *
3331 sort_search_symbols (struct symbol_search *prevtail, int nfound)
3333 struct symbol_search **symbols, *symp, *old_next;
3336 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
3338 symp = prevtail->next;
3339 for (i = 0; i < nfound; i++)
3344 /* Generally NULL. */
3347 qsort (symbols, nfound, sizeof (struct symbol_search *),
3348 compare_search_syms);
3351 for (i = 0; i < nfound; i++)
3353 symp->next = symbols[i];
3356 symp->next = old_next;
3362 /* An object of this type is passed as the user_data to the
3363 expand_symtabs_matching method. */
3364 struct search_symbols_data
3369 /* It is true if PREG contains valid data, false otherwise. */
3370 unsigned preg_p : 1;
3374 /* A callback for expand_symtabs_matching. */
3377 search_symbols_file_matches (const char *filename, void *user_data)
3379 struct search_symbols_data *data = user_data;
3381 return file_matches (filename, data->files, data->nfiles);
3384 /* A callback for expand_symtabs_matching. */
3387 search_symbols_name_matches (const char *symname, void *user_data)
3389 struct search_symbols_data *data = user_data;
3391 return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0;
3394 /* Search the symbol table for matches to the regular expression REGEXP,
3395 returning the results in *MATCHES.
3397 Only symbols of KIND are searched:
3398 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3399 and constants (enums)
3400 FUNCTIONS_DOMAIN - search all functions
3401 TYPES_DOMAIN - search all type names
3402 ALL_DOMAIN - an internal error for this function
3404 free_search_symbols should be called when *MATCHES is no longer needed.
3406 The results are sorted locally; each symtab's global and static blocks are
3407 separately alphabetized. */
3410 search_symbols (char *regexp, enum search_domain kind,
3411 int nfiles, char *files[],
3412 struct symbol_search **matches)
3415 struct blockvector *bv;
3418 struct block_iterator iter;
3420 struct objfile *objfile;
3421 struct minimal_symbol *msymbol;
3423 static const enum minimal_symbol_type types[]
3424 = {mst_data, mst_text, mst_abs};
3425 static const enum minimal_symbol_type types2[]
3426 = {mst_bss, mst_file_text, mst_abs};
3427 static const enum minimal_symbol_type types3[]
3428 = {mst_file_data, mst_solib_trampoline, mst_abs};
3429 static const enum minimal_symbol_type types4[]
3430 = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
3431 enum minimal_symbol_type ourtype;
3432 enum minimal_symbol_type ourtype2;
3433 enum minimal_symbol_type ourtype3;
3434 enum minimal_symbol_type ourtype4;
3435 struct symbol_search *sr;
3436 struct symbol_search *psr;
3437 struct symbol_search *tail;
3438 struct search_symbols_data datum;
3440 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3441 CLEANUP_CHAIN is freed only in the case of an error. */
3442 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
3443 struct cleanup *retval_chain;
3445 gdb_assert (kind <= TYPES_DOMAIN);
3447 ourtype = types[kind];
3448 ourtype2 = types2[kind];
3449 ourtype3 = types3[kind];
3450 ourtype4 = types4[kind];
3452 sr = *matches = NULL;
3458 /* Make sure spacing is right for C++ operators.
3459 This is just a courtesy to make the matching less sensitive
3460 to how many spaces the user leaves between 'operator'
3461 and <TYPENAME> or <OPERATOR>. */
3463 char *opname = operator_chars (regexp, &opend);
3468 int fix = -1; /* -1 means ok; otherwise number of
3471 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3473 /* There should 1 space between 'operator' and 'TYPENAME'. */
3474 if (opname[-1] != ' ' || opname[-2] == ' ')
3479 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3480 if (opname[-1] == ' ')
3483 /* If wrong number of spaces, fix it. */
3486 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3488 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3493 errcode = regcomp (&datum.preg, regexp,
3494 REG_NOSUB | (case_sensitivity == case_sensitive_off
3498 char *err = get_regcomp_error (errcode, &datum.preg);
3500 make_cleanup (xfree, err);
3501 error (_("Invalid regexp (%s): %s"), err, regexp);
3504 make_regfree_cleanup (&datum.preg);
3507 /* Search through the partial symtabs *first* for all symbols
3508 matching the regexp. That way we don't have to reproduce all of
3509 the machinery below. */
3511 datum.nfiles = nfiles;
3512 datum.files = files;
3513 ALL_OBJFILES (objfile)
3516 objfile->sf->qf->expand_symtabs_matching (objfile,
3519 : search_symbols_file_matches),
3520 search_symbols_name_matches,
3525 retval_chain = old_chain;
3527 /* Here, we search through the minimal symbol tables for functions
3528 and variables that match, and force their symbols to be read.
3529 This is in particular necessary for demangled variable names,
3530 which are no longer put into the partial symbol tables.
3531 The symbol will then be found during the scan of symtabs below.
3533 For functions, find_pc_symtab should succeed if we have debug info
3534 for the function, for variables we have to call
3535 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3537 If the lookup fails, set found_misc so that we will rescan to print
3538 any matching symbols without debug info.
3539 We only search the objfile the msymbol came from, we no longer search
3540 all objfiles. In large programs (1000s of shared libs) searching all
3541 objfiles is not worth the pain. */
3543 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3545 ALL_MSYMBOLS (objfile, msymbol)
3549 if (msymbol->created_by_gdb)
3552 if (MSYMBOL_TYPE (msymbol) == ourtype
3553 || MSYMBOL_TYPE (msymbol) == ourtype2
3554 || MSYMBOL_TYPE (msymbol) == ourtype3
3555 || MSYMBOL_TYPE (msymbol) == ourtype4)
3558 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3561 /* Note: An important side-effect of these lookup functions
3562 is to expand the symbol table if msymbol is found, for the
3563 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3564 if (kind == FUNCTIONS_DOMAIN
3565 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL
3566 : (lookup_symbol_in_objfile_from_linkage_name
3567 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3575 ALL_PRIMARY_SYMTABS (objfile, s)
3577 bv = BLOCKVECTOR (s);
3578 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3580 struct symbol_search *prevtail = tail;
3583 b = BLOCKVECTOR_BLOCK (bv, i);
3584 ALL_BLOCK_SYMBOLS (b, iter, sym)
3586 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3590 if (file_matches (real_symtab->filename, files, nfiles)
3592 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0,
3594 && ((kind == VARIABLES_DOMAIN
3595 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3596 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
3597 && SYMBOL_CLASS (sym) != LOC_BLOCK
3598 /* LOC_CONST can be used for more than just enums,
3599 e.g., c++ static const members.
3600 We only want to skip enums here. */
3601 && !(SYMBOL_CLASS (sym) == LOC_CONST
3602 && TYPE_CODE (SYMBOL_TYPE (sym))
3604 || (kind == FUNCTIONS_DOMAIN
3605 && SYMBOL_CLASS (sym) == LOC_BLOCK)
3606 || (kind == TYPES_DOMAIN
3607 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
3610 psr = (struct symbol_search *)
3611 xmalloc (sizeof (struct symbol_search));
3613 psr->symtab = real_symtab;
3615 psr->msymbol = NULL;
3627 if (prevtail == NULL)
3629 struct symbol_search dummy;
3632 tail = sort_search_symbols (&dummy, nfound);
3635 make_cleanup_free_search_symbols (sr);
3638 tail = sort_search_symbols (prevtail, nfound);
3643 /* If there are no eyes, avoid all contact. I mean, if there are
3644 no debug symbols, then print directly from the msymbol_vector. */
3646 if (found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
3648 ALL_MSYMBOLS (objfile, msymbol)
3652 if (msymbol->created_by_gdb)
3655 if (MSYMBOL_TYPE (msymbol) == ourtype
3656 || MSYMBOL_TYPE (msymbol) == ourtype2
3657 || MSYMBOL_TYPE (msymbol) == ourtype3
3658 || MSYMBOL_TYPE (msymbol) == ourtype4)
3661 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3664 /* For functions we can do a quick check of whether the
3665 symbol might be found via find_pc_symtab. */
3666 if (kind != FUNCTIONS_DOMAIN
3667 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL)
3669 if (lookup_symbol_in_objfile_from_linkage_name
3670 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3674 psr = (struct symbol_search *)
3675 xmalloc (sizeof (struct symbol_search));
3677 psr->msymbol = msymbol;
3684 make_cleanup_free_search_symbols (sr);
3696 discard_cleanups (retval_chain);
3697 do_cleanups (old_chain);
3701 /* Helper function for symtab_symbol_info, this function uses
3702 the data returned from search_symbols() to print information
3703 regarding the match to gdb_stdout. */
3706 print_symbol_info (enum search_domain kind,
3707 struct symtab *s, struct symbol *sym,
3708 int block, const char *last)
3710 const char *s_filename = symtab_to_filename_for_display (s);
3712 if (last == NULL || filename_cmp (last, s_filename) != 0)
3714 fputs_filtered ("\nFile ", gdb_stdout);
3715 fputs_filtered (s_filename, gdb_stdout);
3716 fputs_filtered (":\n", gdb_stdout);
3719 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3720 printf_filtered ("static ");
3722 /* Typedef that is not a C++ class. */
3723 if (kind == TYPES_DOMAIN
3724 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3725 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3726 /* variable, func, or typedef-that-is-c++-class. */
3727 else if (kind < TYPES_DOMAIN
3728 || (kind == TYPES_DOMAIN
3729 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3731 type_print (SYMBOL_TYPE (sym),
3732 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3733 ? "" : SYMBOL_PRINT_NAME (sym)),
3736 printf_filtered (";\n");
3740 /* This help function for symtab_symbol_info() prints information
3741 for non-debugging symbols to gdb_stdout. */
3744 print_msymbol_info (struct minimal_symbol *msymbol)
3746 struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
3749 if (gdbarch_addr_bit (gdbarch) <= 32)
3750 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3751 & (CORE_ADDR) 0xffffffff,
3754 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3756 printf_filtered ("%s %s\n",
3757 tmp, SYMBOL_PRINT_NAME (msymbol));
3760 /* This is the guts of the commands "info functions", "info types", and
3761 "info variables". It calls search_symbols to find all matches and then
3762 print_[m]symbol_info to print out some useful information about the
3766 symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty)
3768 static const char * const classnames[] =
3769 {"variable", "function", "type"};
3770 struct symbol_search *symbols;
3771 struct symbol_search *p;
3772 struct cleanup *old_chain;
3773 const char *last_filename = NULL;
3776 gdb_assert (kind <= TYPES_DOMAIN);
3778 /* Must make sure that if we're interrupted, symbols gets freed. */
3779 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3780 old_chain = make_cleanup_free_search_symbols (symbols);
3783 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
3784 classnames[kind], regexp);
3786 printf_filtered (_("All defined %ss:\n"), classnames[kind]);
3788 for (p = symbols; p != NULL; p = p->next)
3792 if (p->msymbol != NULL)
3796 printf_filtered (_("\nNon-debugging symbols:\n"));
3799 print_msymbol_info (p->msymbol);
3803 print_symbol_info (kind,
3808 last_filename = symtab_to_filename_for_display (p->symtab);
3812 do_cleanups (old_chain);
3816 variables_info (char *regexp, int from_tty)
3818 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3822 functions_info (char *regexp, int from_tty)
3824 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3829 types_info (char *regexp, int from_tty)
3831 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3834 /* Breakpoint all functions matching regular expression. */
3837 rbreak_command_wrapper (char *regexp, int from_tty)
3839 rbreak_command (regexp, from_tty);
3842 /* A cleanup function that calls end_rbreak_breakpoints. */
3845 do_end_rbreak_breakpoints (void *ignore)
3847 end_rbreak_breakpoints ();
3851 rbreak_command (char *regexp, int from_tty)
3853 struct symbol_search *ss;
3854 struct symbol_search *p;
3855 struct cleanup *old_chain;
3856 char *string = NULL;
3858 char **files = NULL, *file_name;
3863 char *colon = strchr (regexp, ':');
3865 if (colon && *(colon + 1) != ':')
3869 colon_index = colon - regexp;
3870 file_name = alloca (colon_index + 1);
3871 memcpy (file_name, regexp, colon_index);
3872 file_name[colon_index--] = 0;
3873 while (isspace (file_name[colon_index]))
3874 file_name[colon_index--] = 0;
3878 while (isspace (*regexp)) regexp++;
3882 search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss);
3883 old_chain = make_cleanup_free_search_symbols (ss);
3884 make_cleanup (free_current_contents, &string);
3886 start_rbreak_breakpoints ();
3887 make_cleanup (do_end_rbreak_breakpoints, NULL);
3888 for (p = ss; p != NULL; p = p->next)
3890 if (p->msymbol == NULL)
3892 const char *fullname = symtab_to_fullname (p->symtab);
3894 int newlen = (strlen (fullname)
3895 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3900 string = xrealloc (string, newlen);
3903 strcpy (string, fullname);
3904 strcat (string, ":'");
3905 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3906 strcat (string, "'");
3907 break_command (string, from_tty);
3908 print_symbol_info (FUNCTIONS_DOMAIN,
3912 symtab_to_filename_for_display (p->symtab));
3916 int newlen = (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) + 3);
3920 string = xrealloc (string, newlen);
3923 strcpy (string, "'");
3924 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3925 strcat (string, "'");
3927 break_command (string, from_tty);
3928 printf_filtered ("<function, no debug info> %s;\n",
3929 SYMBOL_PRINT_NAME (p->msymbol));
3933 do_cleanups (old_chain);
3937 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3939 Either sym_text[sym_text_len] != '(' and then we search for any
3940 symbol starting with SYM_TEXT text.
3942 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3943 be terminated at that point. Partial symbol tables do not have parameters
3947 compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
3949 int (*ncmp) (const char *, const char *, size_t);
3951 ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp);
3953 if (ncmp (name, sym_text, sym_text_len) != 0)
3956 if (sym_text[sym_text_len] == '(')
3958 /* User searches for `name(someth...'. Require NAME to be terminated.
3959 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3960 present but accept even parameters presence. In this case this
3961 function is in fact strcmp_iw but whitespace skipping is not supported
3962 for tab completion. */
3964 if (name[sym_text_len] != '\0' && name[sym_text_len] != '(')
3971 /* Free any memory associated with a completion list. */
3974 free_completion_list (VEC (char_ptr) **list_ptr)
3979 for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i)
3981 VEC_free (char_ptr, *list_ptr);
3984 /* Callback for make_cleanup. */
3987 do_free_completion_list (void *list)
3989 free_completion_list (list);
3992 /* Helper routine for make_symbol_completion_list. */
3994 static VEC (char_ptr) *return_val;
3996 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3997 completion_list_add_name \
3998 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4000 /* Test to see if the symbol specified by SYMNAME (which is already
4001 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4002 characters. If so, add it to the current completion list. */
4005 completion_list_add_name (const char *symname,
4006 const char *sym_text, int sym_text_len,
4007 const char *text, const char *word)
4009 /* Clip symbols that cannot match. */
4010 if (!compare_symbol_name (symname, sym_text, sym_text_len))
4013 /* We have a match for a completion, so add SYMNAME to the current list
4014 of matches. Note that the name is moved to freshly malloc'd space. */
4019 if (word == sym_text)
4021 new = xmalloc (strlen (symname) + 5);
4022 strcpy (new, symname);
4024 else if (word > sym_text)
4026 /* Return some portion of symname. */
4027 new = xmalloc (strlen (symname) + 5);
4028 strcpy (new, symname + (word - sym_text));
4032 /* Return some of SYM_TEXT plus symname. */
4033 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
4034 strncpy (new, word, sym_text - word);
4035 new[sym_text - word] = '\0';
4036 strcat (new, symname);
4039 VEC_safe_push (char_ptr, return_val, new);
4043 /* ObjC: In case we are completing on a selector, look as the msymbol
4044 again and feed all the selectors into the mill. */
4047 completion_list_objc_symbol (struct minimal_symbol *msymbol,
4048 const char *sym_text, int sym_text_len,
4049 const char *text, const char *word)
4051 static char *tmp = NULL;
4052 static unsigned int tmplen = 0;
4054 const char *method, *category, *selector;
4057 method = SYMBOL_NATURAL_NAME (msymbol);
4059 /* Is it a method? */
4060 if ((method[0] != '-') && (method[0] != '+'))
4063 if (sym_text[0] == '[')
4064 /* Complete on shortened method method. */
4065 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
4067 while ((strlen (method) + 1) >= tmplen)
4073 tmp = xrealloc (tmp, tmplen);
4075 selector = strchr (method, ' ');
4076 if (selector != NULL)
4079 category = strchr (method, '(');
4081 if ((category != NULL) && (selector != NULL))
4083 memcpy (tmp, method, (category - method));
4084 tmp[category - method] = ' ';
4085 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
4086 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4087 if (sym_text[0] == '[')
4088 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
4091 if (selector != NULL)
4093 /* Complete on selector only. */
4094 strcpy (tmp, selector);
4095 tmp2 = strchr (tmp, ']');
4099 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4103 /* Break the non-quoted text based on the characters which are in
4104 symbols. FIXME: This should probably be language-specific. */
4107 language_search_unquoted_string (char *text, char *p)
4109 for (; p > text; --p)
4111 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
4115 if ((current_language->la_language == language_objc))
4117 if (p[-1] == ':') /* Might be part of a method name. */
4119 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
4120 p -= 2; /* Beginning of a method name. */
4121 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
4122 { /* Might be part of a method name. */
4125 /* Seeing a ' ' or a '(' is not conclusive evidence
4126 that we are in the middle of a method name. However,
4127 finding "-[" or "+[" should be pretty un-ambiguous.
4128 Unfortunately we have to find it now to decide. */
4131 if (isalnum (t[-1]) || t[-1] == '_' ||
4132 t[-1] == ' ' || t[-1] == ':' ||
4133 t[-1] == '(' || t[-1] == ')')
4138 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
4139 p = t - 2; /* Method name detected. */
4140 /* Else we leave with p unchanged. */
4150 completion_list_add_fields (struct symbol *sym, char *sym_text,
4151 int sym_text_len, char *text, char *word)
4153 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4155 struct type *t = SYMBOL_TYPE (sym);
4156 enum type_code c = TYPE_CODE (t);
4159 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
4160 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
4161 if (TYPE_FIELD_NAME (t, j))
4162 completion_list_add_name (TYPE_FIELD_NAME (t, j),
4163 sym_text, sym_text_len, text, word);
4167 /* Type of the user_data argument passed to add_macro_name or
4168 expand_partial_symbol_name. The contents are simply whatever is
4169 needed by completion_list_add_name. */
4170 struct add_name_data
4178 /* A callback used with macro_for_each and macro_for_each_in_scope.
4179 This adds a macro's name to the current completion list. */
4182 add_macro_name (const char *name, const struct macro_definition *ignore,
4183 struct macro_source_file *ignore2, int ignore3,
4186 struct add_name_data *datum = (struct add_name_data *) user_data;
4188 completion_list_add_name ((char *) name,
4189 datum->sym_text, datum->sym_text_len,
4190 datum->text, datum->word);
4193 /* A callback for expand_partial_symbol_names. */
4196 expand_partial_symbol_name (const char *name, void *user_data)
4198 struct add_name_data *datum = (struct add_name_data *) user_data;
4200 return compare_symbol_name (name, datum->sym_text, datum->sym_text_len);
4204 default_make_symbol_completion_list_break_on (char *text, char *word,
4205 const char *break_on,
4206 enum type_code code)
4208 /* Problem: All of the symbols have to be copied because readline
4209 frees them. I'm not going to worry about this; hopefully there
4210 won't be that many. */
4214 struct minimal_symbol *msymbol;
4215 struct objfile *objfile;
4217 const struct block *surrounding_static_block, *surrounding_global_block;
4218 struct block_iterator iter;
4219 /* The symbol we are completing on. Points in same buffer as text. */
4221 /* Length of sym_text. */
4223 struct add_name_data datum;
4224 struct cleanup *back_to;
4226 /* Now look for the symbol we are supposed to complete on. */
4230 char *quote_pos = NULL;
4232 /* First see if this is a quoted string. */
4234 for (p = text; *p != '\0'; ++p)
4236 if (quote_found != '\0')
4238 if (*p == quote_found)
4239 /* Found close quote. */
4241 else if (*p == '\\' && p[1] == quote_found)
4242 /* A backslash followed by the quote character
4243 doesn't end the string. */
4246 else if (*p == '\'' || *p == '"')
4252 if (quote_found == '\'')
4253 /* A string within single quotes can be a symbol, so complete on it. */
4254 sym_text = quote_pos + 1;
4255 else if (quote_found == '"')
4256 /* A double-quoted string is never a symbol, nor does it make sense
4257 to complete it any other way. */
4263 /* It is not a quoted string. Break it based on the characters
4264 which are in symbols. */
4267 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
4268 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
4277 sym_text_len = strlen (sym_text);
4279 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4281 if (current_language->la_language == language_cplus
4282 || current_language->la_language == language_java
4283 || current_language->la_language == language_fortran)
4285 /* These languages may have parameters entered by user but they are never
4286 present in the partial symbol tables. */
4288 const char *cs = memchr (sym_text, '(', sym_text_len);
4291 sym_text_len = cs - sym_text;
4293 gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
4296 back_to = make_cleanup (do_free_completion_list, &return_val);
4298 datum.sym_text = sym_text;
4299 datum.sym_text_len = sym_text_len;
4303 /* Look through the partial symtabs for all symbols which begin
4304 by matching SYM_TEXT. Expand all CUs that you find to the list.
4305 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4306 expand_partial_symbol_names (expand_partial_symbol_name, &datum);
4308 /* At this point scan through the misc symbol vectors and add each
4309 symbol you find to the list. Eventually we want to ignore
4310 anything that isn't a text symbol (everything else will be
4311 handled by the psymtab code above). */
4313 if (code == TYPE_CODE_UNDEF)
4315 ALL_MSYMBOLS (objfile, msymbol)
4318 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text,
4321 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text,
4326 /* Search upwards from currently selected frame (so that we can
4327 complete on local vars). Also catch fields of types defined in
4328 this places which match our text string. Only complete on types
4329 visible from current context. */
4331 b = get_selected_block (0);
4332 surrounding_static_block = block_static_block (b);
4333 surrounding_global_block = block_global_block (b);
4334 if (surrounding_static_block != NULL)
4335 while (b != surrounding_static_block)
4339 ALL_BLOCK_SYMBOLS (b, iter, sym)
4341 if (code == TYPE_CODE_UNDEF)
4343 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4345 completion_list_add_fields (sym, sym_text, sym_text_len, text,
4348 else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4349 && TYPE_CODE (SYMBOL_TYPE (sym)) == code)
4350 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4354 /* Stop when we encounter an enclosing function. Do not stop for
4355 non-inlined functions - the locals of the enclosing function
4356 are in scope for a nested function. */
4357 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
4359 b = BLOCK_SUPERBLOCK (b);
4362 /* Add fields from the file's types; symbols will be added below. */
4364 if (code == TYPE_CODE_UNDEF)
4366 if (surrounding_static_block != NULL)
4367 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
4368 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4370 if (surrounding_global_block != NULL)
4371 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
4372 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4375 /* Go through the symtabs and check the externs and statics for
4376 symbols which match. */
4378 ALL_PRIMARY_SYMTABS (objfile, s)
4381 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4382 ALL_BLOCK_SYMBOLS (b, iter, sym)
4384 if (code == TYPE_CODE_UNDEF
4385 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4386 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
4387 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4391 ALL_PRIMARY_SYMTABS (objfile, s)
4394 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4395 ALL_BLOCK_SYMBOLS (b, iter, sym)
4397 if (code == TYPE_CODE_UNDEF
4398 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4399 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
4400 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4404 /* Skip macros if we are completing a struct tag -- arguable but
4405 usually what is expected. */
4406 if (current_language->la_macro_expansion == macro_expansion_c
4407 && code == TYPE_CODE_UNDEF)
4409 struct macro_scope *scope;
4411 /* Add any macros visible in the default scope. Note that this
4412 may yield the occasional wrong result, because an expression
4413 might be evaluated in a scope other than the default. For
4414 example, if the user types "break file:line if <TAB>", the
4415 resulting expression will be evaluated at "file:line" -- but
4416 at there does not seem to be a way to detect this at
4418 scope = default_macro_scope ();
4421 macro_for_each_in_scope (scope->file, scope->line,
4422 add_macro_name, &datum);
4426 /* User-defined macros are always visible. */
4427 macro_for_each (macro_user_macros, add_macro_name, &datum);
4430 discard_cleanups (back_to);
4431 return (return_val);
4435 default_make_symbol_completion_list (char *text, char *word,
4436 enum type_code code)
4438 return default_make_symbol_completion_list_break_on (text, word, "", code);
4441 /* Return a vector of all symbols (regardless of class) which begin by
4442 matching TEXT. If the answer is no symbols, then the return value
4446 make_symbol_completion_list (char *text, char *word)
4448 return current_language->la_make_symbol_completion_list (text, word,
4452 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4453 symbols whose type code is CODE. */
4456 make_symbol_completion_type (char *text, char *word, enum type_code code)
4458 gdb_assert (code == TYPE_CODE_UNION
4459 || code == TYPE_CODE_STRUCT
4460 || code == TYPE_CODE_CLASS
4461 || code == TYPE_CODE_ENUM);
4462 return current_language->la_make_symbol_completion_list (text, word, code);
4465 /* Like make_symbol_completion_list, but suitable for use as a
4466 completion function. */
4469 make_symbol_completion_list_fn (struct cmd_list_element *ignore,
4470 char *text, char *word)
4472 return make_symbol_completion_list (text, word);
4475 /* Like make_symbol_completion_list, but returns a list of symbols
4476 defined in a source file FILE. */
4479 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
4484 struct block_iterator iter;
4485 /* The symbol we are completing on. Points in same buffer as text. */
4487 /* Length of sym_text. */
4490 /* Now look for the symbol we are supposed to complete on.
4491 FIXME: This should be language-specific. */
4495 char *quote_pos = NULL;
4497 /* First see if this is a quoted string. */
4499 for (p = text; *p != '\0'; ++p)
4501 if (quote_found != '\0')
4503 if (*p == quote_found)
4504 /* Found close quote. */
4506 else if (*p == '\\' && p[1] == quote_found)
4507 /* A backslash followed by the quote character
4508 doesn't end the string. */
4511 else if (*p == '\'' || *p == '"')
4517 if (quote_found == '\'')
4518 /* A string within single quotes can be a symbol, so complete on it. */
4519 sym_text = quote_pos + 1;
4520 else if (quote_found == '"')
4521 /* A double-quoted string is never a symbol, nor does it make sense
4522 to complete it any other way. */
4528 /* Not a quoted string. */
4529 sym_text = language_search_unquoted_string (text, p);
4533 sym_text_len = strlen (sym_text);
4537 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4539 s = lookup_symtab (srcfile);
4542 /* Maybe they typed the file with leading directories, while the
4543 symbol tables record only its basename. */
4544 const char *tail = lbasename (srcfile);
4547 s = lookup_symtab (tail);
4550 /* If we have no symtab for that file, return an empty list. */
4552 return (return_val);
4554 /* Go through this symtab and check the externs and statics for
4555 symbols which match. */
4557 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4558 ALL_BLOCK_SYMBOLS (b, iter, sym)
4560 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4563 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4564 ALL_BLOCK_SYMBOLS (b, iter, sym)
4566 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4569 return (return_val);
4572 /* A helper function for make_source_files_completion_list. It adds
4573 another file name to a list of possible completions, growing the
4574 list as necessary. */
4577 add_filename_to_list (const char *fname, char *text, char *word,
4578 VEC (char_ptr) **list)
4581 size_t fnlen = strlen (fname);
4585 /* Return exactly fname. */
4586 new = xmalloc (fnlen + 5);
4587 strcpy (new, fname);
4589 else if (word > text)
4591 /* Return some portion of fname. */
4592 new = xmalloc (fnlen + 5);
4593 strcpy (new, fname + (word - text));
4597 /* Return some of TEXT plus fname. */
4598 new = xmalloc (fnlen + (text - word) + 5);
4599 strncpy (new, word, text - word);
4600 new[text - word] = '\0';
4601 strcat (new, fname);
4603 VEC_safe_push (char_ptr, *list, new);
4607 not_interesting_fname (const char *fname)
4609 static const char *illegal_aliens[] = {
4610 "_globals_", /* inserted by coff_symtab_read */
4615 for (i = 0; illegal_aliens[i]; i++)
4617 if (filename_cmp (fname, illegal_aliens[i]) == 0)
4623 /* An object of this type is passed as the user_data argument to
4624 map_partial_symbol_filenames. */
4625 struct add_partial_filename_data
4627 struct filename_seen_cache *filename_seen_cache;
4631 VEC (char_ptr) **list;
4634 /* A callback for map_partial_symbol_filenames. */
4637 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
4640 struct add_partial_filename_data *data = user_data;
4642 if (not_interesting_fname (filename))
4644 if (!filename_seen (data->filename_seen_cache, filename, 1)
4645 && filename_ncmp (filename, data->text, data->text_len) == 0)
4647 /* This file matches for a completion; add it to the
4648 current list of matches. */
4649 add_filename_to_list (filename, data->text, data->word, data->list);
4653 const char *base_name = lbasename (filename);
4655 if (base_name != filename
4656 && !filename_seen (data->filename_seen_cache, base_name, 1)
4657 && filename_ncmp (base_name, data->text, data->text_len) == 0)
4658 add_filename_to_list (base_name, data->text, data->word, data->list);
4662 /* Return a vector of all source files whose names begin with matching
4663 TEXT. The file names are looked up in the symbol tables of this
4664 program. If the answer is no matchess, then the return value is
4668 make_source_files_completion_list (char *text, char *word)
4671 struct objfile *objfile;
4672 size_t text_len = strlen (text);
4673 VEC (char_ptr) *list = NULL;
4674 const char *base_name;
4675 struct add_partial_filename_data datum;
4676 struct filename_seen_cache *filename_seen_cache;
4677 struct cleanup *back_to, *cache_cleanup;
4679 if (!have_full_symbols () && !have_partial_symbols ())
4682 back_to = make_cleanup (do_free_completion_list, &list);
4684 filename_seen_cache = create_filename_seen_cache ();
4685 cache_cleanup = make_cleanup (delete_filename_seen_cache,
4686 filename_seen_cache);
4688 ALL_SYMTABS (objfile, s)
4690 if (not_interesting_fname (s->filename))
4692 if (!filename_seen (filename_seen_cache, s->filename, 1)
4693 && filename_ncmp (s->filename, text, text_len) == 0)
4695 /* This file matches for a completion; add it to the current
4697 add_filename_to_list (s->filename, text, word, &list);
4701 /* NOTE: We allow the user to type a base name when the
4702 debug info records leading directories, but not the other
4703 way around. This is what subroutines of breakpoint
4704 command do when they parse file names. */
4705 base_name = lbasename (s->filename);
4706 if (base_name != s->filename
4707 && !filename_seen (filename_seen_cache, base_name, 1)
4708 && filename_ncmp (base_name, text, text_len) == 0)
4709 add_filename_to_list (base_name, text, word, &list);
4713 datum.filename_seen_cache = filename_seen_cache;
4716 datum.text_len = text_len;
4718 map_partial_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
4719 0 /*need_fullname*/);
4721 do_cleanups (cache_cleanup);
4722 discard_cleanups (back_to);
4727 /* Determine if PC is in the prologue of a function. The prologue is the area
4728 between the first instruction of a function, and the first executable line.
4729 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4731 If non-zero, func_start is where we think the prologue starts, possibly
4732 by previous examination of symbol table information. */
4735 in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
4737 struct symtab_and_line sal;
4738 CORE_ADDR func_addr, func_end;
4740 /* We have several sources of information we can consult to figure
4742 - Compilers usually emit line number info that marks the prologue
4743 as its own "source line". So the ending address of that "line"
4744 is the end of the prologue. If available, this is the most
4746 - The minimal symbols and partial symbols, which can usually tell
4747 us the starting and ending addresses of a function.
4748 - If we know the function's start address, we can call the
4749 architecture-defined gdbarch_skip_prologue function to analyze the
4750 instruction stream and guess where the prologue ends.
4751 - Our `func_start' argument; if non-zero, this is the caller's
4752 best guess as to the function's entry point. At the time of
4753 this writing, handle_inferior_event doesn't get this right, so
4754 it should be our last resort. */
4756 /* Consult the partial symbol table, to find which function
4758 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4760 CORE_ADDR prologue_end;
4762 /* We don't even have minsym information, so fall back to using
4763 func_start, if given. */
4765 return 1; /* We *might* be in a prologue. */
4767 prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
4769 return func_start <= pc && pc < prologue_end;
4772 /* If we have line number information for the function, that's
4773 usually pretty reliable. */
4774 sal = find_pc_line (func_addr, 0);
4776 /* Now sal describes the source line at the function's entry point,
4777 which (by convention) is the prologue. The end of that "line",
4778 sal.end, is the end of the prologue.
4780 Note that, for functions whose source code is all on a single
4781 line, the line number information doesn't always end up this way.
4782 So we must verify that our purported end-of-prologue address is
4783 *within* the function, not at its start or end. */
4785 || sal.end <= func_addr
4786 || func_end <= sal.end)
4788 /* We don't have any good line number info, so use the minsym
4789 information, together with the architecture-specific prologue
4791 CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
4793 return func_addr <= pc && pc < prologue_end;
4796 /* We have line number info, and it looks good. */
4797 return func_addr <= pc && pc < sal.end;
4800 /* Given PC at the function's start address, attempt to find the
4801 prologue end using SAL information. Return zero if the skip fails.
4803 A non-optimized prologue traditionally has one SAL for the function
4804 and a second for the function body. A single line function has
4805 them both pointing at the same line.
4807 An optimized prologue is similar but the prologue may contain
4808 instructions (SALs) from the instruction body. Need to skip those
4809 while not getting into the function body.
4811 The functions end point and an increasing SAL line are used as
4812 indicators of the prologue's endpoint.
4814 This code is based on the function refine_prologue_limit
4818 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
4820 struct symtab_and_line prologue_sal;
4825 /* Get an initial range for the function. */
4826 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4827 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
4829 prologue_sal = find_pc_line (start_pc, 0);
4830 if (prologue_sal.line != 0)
4832 /* For languages other than assembly, treat two consecutive line
4833 entries at the same address as a zero-instruction prologue.
4834 The GNU assembler emits separate line notes for each instruction
4835 in a multi-instruction macro, but compilers generally will not
4837 if (prologue_sal.symtab->language != language_asm)
4839 struct linetable *linetable = LINETABLE (prologue_sal.symtab);
4842 /* Skip any earlier lines, and any end-of-sequence marker
4843 from a previous function. */
4844 while (linetable->item[idx].pc != prologue_sal.pc
4845 || linetable->item[idx].line == 0)
4848 if (idx+1 < linetable->nitems
4849 && linetable->item[idx+1].line != 0
4850 && linetable->item[idx+1].pc == start_pc)
4854 /* If there is only one sal that covers the entire function,
4855 then it is probably a single line function, like
4857 if (prologue_sal.end >= end_pc)
4860 while (prologue_sal.end < end_pc)
4862 struct symtab_and_line sal;
4864 sal = find_pc_line (prologue_sal.end, 0);
4867 /* Assume that a consecutive SAL for the same (or larger)
4868 line mark the prologue -> body transition. */
4869 if (sal.line >= prologue_sal.line)
4871 /* Likewise if we are in a different symtab altogether
4872 (e.g. within a file included via #include). */
4873 if (sal.symtab != prologue_sal.symtab)
4876 /* The line number is smaller. Check that it's from the
4877 same function, not something inlined. If it's inlined,
4878 then there is no point comparing the line numbers. */
4879 bl = block_for_pc (prologue_sal.end);
4882 if (block_inlined_p (bl))
4884 if (BLOCK_FUNCTION (bl))
4889 bl = BLOCK_SUPERBLOCK (bl);
4894 /* The case in which compiler's optimizer/scheduler has
4895 moved instructions into the prologue. We look ahead in
4896 the function looking for address ranges whose
4897 corresponding line number is less the first one that we
4898 found for the function. This is more conservative then
4899 refine_prologue_limit which scans a large number of SALs
4900 looking for any in the prologue. */
4905 if (prologue_sal.end < end_pc)
4906 /* Return the end of this line, or zero if we could not find a
4908 return prologue_sal.end;
4910 /* Don't return END_PC, which is past the end of the function. */
4911 return prologue_sal.pc;
4915 static char *name_of_main;
4916 enum language language_of_main = language_unknown;
4919 set_main_name (const char *name)
4921 if (name_of_main != NULL)
4923 xfree (name_of_main);
4924 name_of_main = NULL;
4925 language_of_main = language_unknown;
4929 name_of_main = xstrdup (name);
4930 language_of_main = language_unknown;
4934 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4938 find_main_name (void)
4940 const char *new_main_name;
4942 /* Try to see if the main procedure is in Ada. */
4943 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4944 be to add a new method in the language vector, and call this
4945 method for each language until one of them returns a non-empty
4946 name. This would allow us to remove this hard-coded call to
4947 an Ada function. It is not clear that this is a better approach
4948 at this point, because all methods need to be written in a way
4949 such that false positives never be returned. For instance, it is
4950 important that a method does not return a wrong name for the main
4951 procedure if the main procedure is actually written in a different
4952 language. It is easy to guaranty this with Ada, since we use a
4953 special symbol generated only when the main in Ada to find the name
4954 of the main procedure. It is difficult however to see how this can
4955 be guarantied for languages such as C, for instance. This suggests
4956 that order of call for these methods becomes important, which means
4957 a more complicated approach. */
4958 new_main_name = ada_main_name ();
4959 if (new_main_name != NULL)
4961 set_main_name (new_main_name);
4965 new_main_name = go_main_name ();
4966 if (new_main_name != NULL)
4968 set_main_name (new_main_name);
4972 new_main_name = pascal_main_name ();
4973 if (new_main_name != NULL)
4975 set_main_name (new_main_name);
4979 /* The languages above didn't identify the name of the main procedure.
4980 Fallback to "main". */
4981 set_main_name ("main");
4987 if (name_of_main == NULL)
4990 return name_of_main;
4993 /* Handle ``executable_changed'' events for the symtab module. */
4996 symtab_observer_executable_changed (void)
4998 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4999 set_main_name (NULL);
5002 /* Return 1 if the supplied producer string matches the ARM RealView
5003 compiler (armcc). */
5006 producer_is_realview (const char *producer)
5008 static const char *const arm_idents[] = {
5009 "ARM C Compiler, ADS",
5010 "Thumb C Compiler, ADS",
5011 "ARM C++ Compiler, ADS",
5012 "Thumb C++ Compiler, ADS",
5013 "ARM/Thumb C/C++ Compiler, RVCT",
5014 "ARM C/C++ Compiler, RVCT"
5018 if (producer == NULL)
5021 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
5022 if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0)
5029 _initialize_symtab (void)
5031 add_info ("variables", variables_info, _("\
5032 All global and static variable names, or those matching REGEXP."));
5034 add_com ("whereis", class_info, variables_info, _("\
5035 All global and static variable names, or those matching REGEXP."));
5037 add_info ("functions", functions_info,
5038 _("All function names, or those matching REGEXP."));
5040 /* FIXME: This command has at least the following problems:
5041 1. It prints builtin types (in a very strange and confusing fashion).
5042 2. It doesn't print right, e.g. with
5043 typedef struct foo *FOO
5044 type_print prints "FOO" when we want to make it (in this situation)
5045 print "struct foo *".
5046 I also think "ptype" or "whatis" is more likely to be useful (but if
5047 there is much disagreement "info types" can be fixed). */
5048 add_info ("types", types_info,
5049 _("All type names, or those matching REGEXP."));
5051 add_info ("sources", sources_info,
5052 _("Source files in the program."));
5054 add_com ("rbreak", class_breakpoint, rbreak_command,
5055 _("Set a breakpoint for all functions matching REGEXP."));
5059 add_com ("lf", class_info, sources_info,
5060 _("Source files in the program"));
5061 add_com ("lg", class_info, variables_info, _("\
5062 All global and static variable names, or those matching REGEXP."));
5065 add_setshow_enum_cmd ("multiple-symbols", no_class,
5066 multiple_symbols_modes, &multiple_symbols_mode,
5068 Set the debugger behavior when more than one symbol are possible matches\n\
5069 in an expression."), _("\
5070 Show how the debugger handles ambiguities in expressions."), _("\
5071 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5072 NULL, NULL, &setlist, &showlist);
5074 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
5075 &basenames_may_differ, _("\
5076 Set whether a source file may have multiple base names."), _("\
5077 Show whether a source file may have multiple base names."), _("\
5078 (A \"base name\" is the name of a file with the directory part removed.\n\
5079 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5080 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5081 before comparing them. Canonicalization is an expensive operation,\n\
5082 but it allows the same file be known by more than one base name.\n\
5083 If not set (the default), all source files are assumed to have just\n\
5084 one base name, and gdb will do file name comparisons more efficiently."),
5086 &setlist, &showlist);
5088 add_setshow_boolean_cmd ("symtab-create", no_class, &symtab_create_debug,
5089 _("Set debugging of symbol table creation."),
5090 _("Show debugging of symbol table creation."), _("\
5091 When enabled, debugging messages are printed when building symbol tables."),
5094 &setdebuglist, &showdebuglist);
5096 observer_attach_executable_changed (symtab_observer_executable_changed);