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). We assume that SEARCH_NAME is
150 a relative path. Returns true if they match, false otherwise. */
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 HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
170 compatible with SEARCH_NAME "file.c". In such case a compiler had
171 to put the "c:file.c" name into debug info. Such compatibility
172 works only on GDB built for DOS host. */
173 return (len == search_len
174 || IS_DIR_SEPARATOR (filename[len - search_len - 1])
175 || (HAS_DRIVE_SPEC (filename)
176 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
179 /* Check for a symtab of a specific name by searching some symtabs.
180 This is a helper function for callbacks of iterate_over_symtabs.
182 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
183 are identical to the `map_symtabs_matching_filename' method of
184 quick_symbol_functions.
186 FIRST and AFTER_LAST indicate the range of symtabs to search.
187 AFTER_LAST is one past the last symtab to search; NULL means to
188 search until the end of the list. */
191 iterate_over_some_symtabs (const char *name,
192 const char *full_path,
193 const char *real_path,
194 int (*callback) (struct symtab *symtab,
197 struct symtab *first,
198 struct symtab *after_last)
200 struct symtab *s = NULL;
201 const char* base_name = lbasename (name);
202 int is_abs = IS_ABSOLUTE_PATH (name);
204 for (s = first; s != NULL && s != after_last; s = s->next)
206 /* Exact match is always ok. */
207 if (FILENAME_CMP (name, s->filename) == 0)
209 if (callback (s, data))
213 if (!is_abs && compare_filenames_for_search (s->filename, name))
215 if (callback (s, data))
219 /* Before we invoke realpath, which can get expensive when many
220 files are involved, do a quick comparison of the basenames. */
221 if (! basenames_may_differ
222 && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
225 /* If the user gave us an absolute path, try to find the file in
226 this symtab and use its absolute path. */
228 if (full_path != NULL)
230 const char *fp = symtab_to_fullname (s);
232 if (FILENAME_CMP (full_path, fp) == 0)
234 if (callback (s, data))
238 if (!is_abs && compare_filenames_for_search (fp, name))
240 if (callback (s, data))
245 if (real_path != NULL)
247 const char *fullname = symtab_to_fullname (s);
248 char *rp = gdb_realpath (fullname);
249 struct cleanup *cleanups = make_cleanup (xfree, rp);
251 if (FILENAME_CMP (real_path, rp) == 0)
253 if (callback (s, data))
255 do_cleanups (cleanups);
260 if (!is_abs && compare_filenames_for_search (rp, name))
262 if (callback (s, data))
264 do_cleanups (cleanups);
268 do_cleanups (cleanups);
275 /* Check for a symtab of a specific name; first in symtabs, then in
276 psymtabs. *If* there is no '/' in the name, a match after a '/'
277 in the symtab filename will also work.
279 Calls CALLBACK with each symtab that is found and with the supplied
280 DATA. If CALLBACK returns true, the search stops. */
283 iterate_over_symtabs (const char *name,
284 int (*callback) (struct symtab *symtab,
288 struct symtab *s = NULL;
289 struct objfile *objfile;
290 char *real_path = NULL;
291 char *full_path = NULL;
292 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
294 /* Here we are interested in canonicalizing an absolute path, not
295 absolutizing a relative path. */
296 if (IS_ABSOLUTE_PATH (name))
298 full_path = xfullpath (name);
299 make_cleanup (xfree, full_path);
300 real_path = gdb_realpath (name);
301 make_cleanup (xfree, real_path);
304 ALL_OBJFILES (objfile)
306 if (iterate_over_some_symtabs (name, full_path, real_path, callback, data,
307 objfile->symtabs, NULL))
309 do_cleanups (cleanups);
314 /* Same search rules as above apply here, but now we look thru the
317 ALL_OBJFILES (objfile)
320 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
327 do_cleanups (cleanups);
332 do_cleanups (cleanups);
335 /* The callback function used by lookup_symtab. */
338 lookup_symtab_callback (struct symtab *symtab, void *data)
340 struct symtab **result_ptr = data;
342 *result_ptr = symtab;
346 /* A wrapper for iterate_over_symtabs that returns the first matching
350 lookup_symtab (const char *name)
352 struct symtab *result = NULL;
354 iterate_over_symtabs (name, lookup_symtab_callback, &result);
359 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
360 full method name, which consist of the class name (from T), the unadorned
361 method name from METHOD_ID, and the signature for the specific overload,
362 specified by SIGNATURE_ID. Note that this function is g++ specific. */
365 gdb_mangle_name (struct type *type, int method_id, int signature_id)
367 int mangled_name_len;
369 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
370 struct fn_field *method = &f[signature_id];
371 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
372 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
373 const char *newname = type_name_no_tag (type);
375 /* Does the form of physname indicate that it is the full mangled name
376 of a constructor (not just the args)? */
377 int is_full_physname_constructor;
380 int is_destructor = is_destructor_name (physname);
381 /* Need a new type prefix. */
382 char *const_prefix = method->is_const ? "C" : "";
383 char *volatile_prefix = method->is_volatile ? "V" : "";
385 int len = (newname == NULL ? 0 : strlen (newname));
387 /* Nothing to do if physname already contains a fully mangled v3 abi name
388 or an operator name. */
389 if ((physname[0] == '_' && physname[1] == 'Z')
390 || is_operator_name (field_name))
391 return xstrdup (physname);
393 is_full_physname_constructor = is_constructor_name (physname);
395 is_constructor = is_full_physname_constructor
396 || (newname && strcmp (field_name, newname) == 0);
399 is_destructor = (strncmp (physname, "__dt", 4) == 0);
401 if (is_destructor || is_full_physname_constructor)
403 mangled_name = (char *) xmalloc (strlen (physname) + 1);
404 strcpy (mangled_name, physname);
410 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
412 else if (physname[0] == 't' || physname[0] == 'Q')
414 /* The physname for template and qualified methods already includes
416 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
422 xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix,
423 volatile_prefix, len);
425 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
426 + strlen (buf) + len + strlen (physname) + 1);
428 mangled_name = (char *) xmalloc (mangled_name_len);
430 mangled_name[0] = '\0';
432 strcpy (mangled_name, field_name);
434 strcat (mangled_name, buf);
435 /* If the class doesn't have a name, i.e. newname NULL, then we just
436 mangle it using 0 for the length of the class. Thus it gets mangled
437 as something starting with `::' rather than `classname::'. */
439 strcat (mangled_name, newname);
441 strcat (mangled_name, physname);
442 return (mangled_name);
445 /* Initialize the cplus_specific structure. 'cplus_specific' should
446 only be allocated for use with cplus symbols. */
449 symbol_init_cplus_specific (struct general_symbol_info *gsymbol,
450 struct objfile *objfile)
452 /* A language_specific structure should not have been previously
454 gdb_assert (gsymbol->language_specific.cplus_specific == NULL);
455 gdb_assert (objfile != NULL);
457 gsymbol->language_specific.cplus_specific =
458 OBSTACK_ZALLOC (&objfile->objfile_obstack, struct cplus_specific);
461 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
462 correctly allocated. For C++ symbols a cplus_specific struct is
463 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
464 OBJFILE can be NULL. */
467 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
469 struct objfile *objfile)
471 if (gsymbol->language == language_cplus)
473 if (gsymbol->language_specific.cplus_specific == NULL)
474 symbol_init_cplus_specific (gsymbol, objfile);
476 gsymbol->language_specific.cplus_specific->demangled_name = name;
479 gsymbol->language_specific.mangled_lang.demangled_name = name;
482 /* Return the demangled name of GSYMBOL. */
485 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
487 if (gsymbol->language == language_cplus)
489 if (gsymbol->language_specific.cplus_specific != NULL)
490 return gsymbol->language_specific.cplus_specific->demangled_name;
495 return gsymbol->language_specific.mangled_lang.demangled_name;
499 /* Initialize the language dependent portion of a symbol
500 depending upon the language for the symbol. */
503 symbol_set_language (struct general_symbol_info *gsymbol,
504 enum language language)
506 gsymbol->language = language;
507 if (gsymbol->language == language_d
508 || gsymbol->language == language_go
509 || gsymbol->language == language_java
510 || gsymbol->language == language_objc
511 || gsymbol->language == language_fortran)
513 symbol_set_demangled_name (gsymbol, NULL, NULL);
515 else if (gsymbol->language == language_cplus)
516 gsymbol->language_specific.cplus_specific = NULL;
519 memset (&gsymbol->language_specific, 0,
520 sizeof (gsymbol->language_specific));
524 /* Functions to initialize a symbol's mangled name. */
526 /* Objects of this type are stored in the demangled name hash table. */
527 struct demangled_name_entry
533 /* Hash function for the demangled name hash. */
536 hash_demangled_name_entry (const void *data)
538 const struct demangled_name_entry *e = data;
540 return htab_hash_string (e->mangled);
543 /* Equality function for the demangled name hash. */
546 eq_demangled_name_entry (const void *a, const void *b)
548 const struct demangled_name_entry *da = a;
549 const struct demangled_name_entry *db = b;
551 return strcmp (da->mangled, db->mangled) == 0;
554 /* Create the hash table used for demangled names. Each hash entry is
555 a pair of strings; one for the mangled name and one for the demangled
556 name. The entry is hashed via just the mangled name. */
559 create_demangled_names_hash (struct objfile *objfile)
561 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
562 The hash table code will round this up to the next prime number.
563 Choosing a much larger table size wastes memory, and saves only about
564 1% in symbol reading. */
566 objfile->demangled_names_hash = htab_create_alloc
567 (256, hash_demangled_name_entry, eq_demangled_name_entry,
568 NULL, xcalloc, xfree);
571 /* Try to determine the demangled name for a symbol, based on the
572 language of that symbol. If the language is set to language_auto,
573 it will attempt to find any demangling algorithm that works and
574 then set the language appropriately. The returned name is allocated
575 by the demangler and should be xfree'd. */
578 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
581 char *demangled = NULL;
583 if (gsymbol->language == language_unknown)
584 gsymbol->language = language_auto;
586 if (gsymbol->language == language_objc
587 || gsymbol->language == language_auto)
590 objc_demangle (mangled, 0);
591 if (demangled != NULL)
593 gsymbol->language = language_objc;
597 if (gsymbol->language == language_cplus
598 || gsymbol->language == language_auto)
601 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
602 if (demangled != NULL)
604 gsymbol->language = language_cplus;
608 if (gsymbol->language == language_java)
611 cplus_demangle (mangled,
612 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
613 if (demangled != NULL)
615 gsymbol->language = language_java;
619 if (gsymbol->language == language_d
620 || gsymbol->language == language_auto)
622 demangled = d_demangle(mangled, 0);
623 if (demangled != NULL)
625 gsymbol->language = language_d;
629 /* FIXME(dje): Continually adding languages here is clumsy.
630 Better to just call la_demangle if !auto, and if auto then call
631 a utility routine that tries successive languages in turn and reports
632 which one it finds. I realize the la_demangle options may be different
633 for different languages but there's already a FIXME for that. */
634 if (gsymbol->language == language_go
635 || gsymbol->language == language_auto)
637 demangled = go_demangle (mangled, 0);
638 if (demangled != NULL)
640 gsymbol->language = language_go;
645 /* We could support `gsymbol->language == language_fortran' here to provide
646 module namespaces also for inferiors with only minimal symbol table (ELF
647 symbols). Just the mangling standard is not standardized across compilers
648 and there is no DW_AT_producer available for inferiors with only the ELF
649 symbols to check the mangling kind. */
653 /* Set both the mangled and demangled (if any) names for GSYMBOL based
654 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
655 objfile's obstack; but if COPY_NAME is 0 and if NAME is
656 NUL-terminated, then this function assumes that NAME is already
657 correctly saved (either permanently or with a lifetime tied to the
658 objfile), and it will not be copied.
660 The hash table corresponding to OBJFILE is used, and the memory
661 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
662 so the pointer can be discarded after calling this function. */
664 /* We have to be careful when dealing with Java names: when we run
665 into a Java minimal symbol, we don't know it's a Java symbol, so it
666 gets demangled as a C++ name. This is unfortunate, but there's not
667 much we can do about it: but when demangling partial symbols and
668 regular symbols, we'd better not reuse the wrong demangled name.
669 (See PR gdb/1039.) We solve this by putting a distinctive prefix
670 on Java names when storing them in the hash table. */
672 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
673 don't mind the Java prefix so much: different languages have
674 different demangling requirements, so it's only natural that we
675 need to keep language data around in our demangling cache. But
676 it's not good that the minimal symbol has the wrong demangled name.
677 Unfortunately, I can't think of any easy solution to that
680 #define JAVA_PREFIX "##JAVA$$"
681 #define JAVA_PREFIX_LEN 8
684 symbol_set_names (struct general_symbol_info *gsymbol,
685 const char *linkage_name, int len, int copy_name,
686 struct objfile *objfile)
688 struct demangled_name_entry **slot;
689 /* A 0-terminated copy of the linkage name. */
690 const char *linkage_name_copy;
691 /* A copy of the linkage name that might have a special Java prefix
692 added to it, for use when looking names up in the hash table. */
693 const char *lookup_name;
694 /* The length of lookup_name. */
696 struct demangled_name_entry entry;
698 if (gsymbol->language == language_ada)
700 /* In Ada, we do the symbol lookups using the mangled name, so
701 we can save some space by not storing the demangled name.
703 As a side note, we have also observed some overlap between
704 the C++ mangling and Ada mangling, similarly to what has
705 been observed with Java. Because we don't store the demangled
706 name with the symbol, we don't need to use the same trick
709 gsymbol->name = linkage_name;
712 char *name = obstack_alloc (&objfile->objfile_obstack, len + 1);
714 memcpy (name, linkage_name, len);
716 gsymbol->name = name;
718 symbol_set_demangled_name (gsymbol, NULL, NULL);
723 if (objfile->demangled_names_hash == NULL)
724 create_demangled_names_hash (objfile);
726 /* The stabs reader generally provides names that are not
727 NUL-terminated; most of the other readers don't do this, so we
728 can just use the given copy, unless we're in the Java case. */
729 if (gsymbol->language == language_java)
733 lookup_len = len + JAVA_PREFIX_LEN;
734 alloc_name = alloca (lookup_len + 1);
735 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
736 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
737 alloc_name[lookup_len] = '\0';
739 lookup_name = alloc_name;
740 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
742 else if (linkage_name[len] != '\0')
747 alloc_name = alloca (lookup_len + 1);
748 memcpy (alloc_name, linkage_name, len);
749 alloc_name[lookup_len] = '\0';
751 lookup_name = alloc_name;
752 linkage_name_copy = alloc_name;
757 lookup_name = linkage_name;
758 linkage_name_copy = linkage_name;
761 entry.mangled = lookup_name;
762 slot = ((struct demangled_name_entry **)
763 htab_find_slot (objfile->demangled_names_hash,
766 /* If this name is not in the hash table, add it. */
768 /* A C version of the symbol may have already snuck into the table.
769 This happens to, e.g., main.init (__go_init_main). Cope. */
770 || (gsymbol->language == language_go
771 && (*slot)->demangled[0] == '\0'))
773 char *demangled_name = symbol_find_demangled_name (gsymbol,
775 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
777 /* Suppose we have demangled_name==NULL, copy_name==0, and
778 lookup_name==linkage_name. In this case, we already have the
779 mangled name saved, and we don't have a demangled name. So,
780 you might think we could save a little space by not recording
781 this in the hash table at all.
783 It turns out that it is actually important to still save such
784 an entry in the hash table, because storing this name gives
785 us better bcache hit rates for partial symbols. */
786 if (!copy_name && lookup_name == linkage_name)
788 *slot = obstack_alloc (&objfile->objfile_obstack,
789 offsetof (struct demangled_name_entry,
791 + demangled_len + 1);
792 (*slot)->mangled = lookup_name;
798 /* If we must copy the mangled name, put it directly after
799 the demangled name so we can have a single
801 *slot = obstack_alloc (&objfile->objfile_obstack,
802 offsetof (struct demangled_name_entry,
804 + lookup_len + demangled_len + 2);
805 mangled_ptr = &((*slot)->demangled[demangled_len + 1]);
806 strcpy (mangled_ptr, lookup_name);
807 (*slot)->mangled = mangled_ptr;
810 if (demangled_name != NULL)
812 strcpy ((*slot)->demangled, demangled_name);
813 xfree (demangled_name);
816 (*slot)->demangled[0] = '\0';
819 gsymbol->name = (*slot)->mangled + lookup_len - len;
820 if ((*slot)->demangled[0] != '\0')
821 symbol_set_demangled_name (gsymbol, (*slot)->demangled, objfile);
823 symbol_set_demangled_name (gsymbol, NULL, objfile);
826 /* Return the source code name of a symbol. In languages where
827 demangling is necessary, this is the demangled name. */
830 symbol_natural_name (const struct general_symbol_info *gsymbol)
832 switch (gsymbol->language)
839 case language_fortran:
840 if (symbol_get_demangled_name (gsymbol) != NULL)
841 return symbol_get_demangled_name (gsymbol);
844 if (symbol_get_demangled_name (gsymbol) != NULL)
845 return symbol_get_demangled_name (gsymbol);
847 return ada_decode_symbol (gsymbol);
852 return gsymbol->name;
855 /* Return the demangled name for a symbol based on the language for
856 that symbol. If no demangled name exists, return NULL. */
859 symbol_demangled_name (const struct general_symbol_info *gsymbol)
861 const char *dem_name = NULL;
863 switch (gsymbol->language)
870 case language_fortran:
871 dem_name = symbol_get_demangled_name (gsymbol);
874 dem_name = symbol_get_demangled_name (gsymbol);
875 if (dem_name == NULL)
876 dem_name = ada_decode_symbol (gsymbol);
884 /* Return the search name of a symbol---generally the demangled or
885 linkage name of the symbol, depending on how it will be searched for.
886 If there is no distinct demangled name, then returns the same value
887 (same pointer) as SYMBOL_LINKAGE_NAME. */
890 symbol_search_name (const struct general_symbol_info *gsymbol)
892 if (gsymbol->language == language_ada)
893 return gsymbol->name;
895 return symbol_natural_name (gsymbol);
898 /* Initialize the structure fields to zero values. */
901 init_sal (struct symtab_and_line *sal)
909 sal->explicit_pc = 0;
910 sal->explicit_line = 0;
915 /* Return 1 if the two sections are the same, or if they could
916 plausibly be copies of each other, one in an original object
917 file and another in a separated debug file. */
920 matching_obj_sections (struct obj_section *obj_first,
921 struct obj_section *obj_second)
923 asection *first = obj_first? obj_first->the_bfd_section : NULL;
924 asection *second = obj_second? obj_second->the_bfd_section : NULL;
927 /* If they're the same section, then they match. */
931 /* If either is NULL, give up. */
932 if (first == NULL || second == NULL)
935 /* This doesn't apply to absolute symbols. */
936 if (first->owner == NULL || second->owner == NULL)
939 /* If they're in the same object file, they must be different sections. */
940 if (first->owner == second->owner)
943 /* Check whether the two sections are potentially corresponding. They must
944 have the same size, address, and name. We can't compare section indexes,
945 which would be more reliable, because some sections may have been
947 if (bfd_get_section_size (first) != bfd_get_section_size (second))
950 /* In-memory addresses may start at a different offset, relativize them. */
951 if (bfd_get_section_vma (first->owner, first)
952 - bfd_get_start_address (first->owner)
953 != bfd_get_section_vma (second->owner, second)
954 - bfd_get_start_address (second->owner))
957 if (bfd_get_section_name (first->owner, first) == NULL
958 || bfd_get_section_name (second->owner, second) == NULL
959 || strcmp (bfd_get_section_name (first->owner, first),
960 bfd_get_section_name (second->owner, second)) != 0)
963 /* Otherwise check that they are in corresponding objfiles. */
966 if (obj->obfd == first->owner)
968 gdb_assert (obj != NULL);
970 if (obj->separate_debug_objfile != NULL
971 && obj->separate_debug_objfile->obfd == second->owner)
973 if (obj->separate_debug_objfile_backlink != NULL
974 && obj->separate_debug_objfile_backlink->obfd == second->owner)
981 find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section)
983 struct objfile *objfile;
984 struct minimal_symbol *msymbol;
986 /* If we know that this is not a text address, return failure. This is
987 necessary because we loop based on texthigh and textlow, which do
988 not include the data ranges. */
989 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
991 && (MSYMBOL_TYPE (msymbol) == mst_data
992 || MSYMBOL_TYPE (msymbol) == mst_bss
993 || MSYMBOL_TYPE (msymbol) == mst_abs
994 || MSYMBOL_TYPE (msymbol) == mst_file_data
995 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
998 ALL_OBJFILES (objfile)
1000 struct symtab *result = NULL;
1003 result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
1012 /* Debug symbols usually don't have section information. We need to dig that
1013 out of the minimal symbols and stash that in the debug symbol. */
1016 fixup_section (struct general_symbol_info *ginfo,
1017 CORE_ADDR addr, struct objfile *objfile)
1019 struct minimal_symbol *msym;
1021 /* First, check whether a minimal symbol with the same name exists
1022 and points to the same address. The address check is required
1023 e.g. on PowerPC64, where the minimal symbol for a function will
1024 point to the function descriptor, while the debug symbol will
1025 point to the actual function code. */
1026 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1029 ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
1030 ginfo->section = SYMBOL_SECTION (msym);
1034 /* Static, function-local variables do appear in the linker
1035 (minimal) symbols, but are frequently given names that won't
1036 be found via lookup_minimal_symbol(). E.g., it has been
1037 observed in frv-uclinux (ELF) executables that a static,
1038 function-local variable named "foo" might appear in the
1039 linker symbols as "foo.6" or "foo.3". Thus, there is no
1040 point in attempting to extend the lookup-by-name mechanism to
1041 handle this case due to the fact that there can be multiple
1044 So, instead, search the section table when lookup by name has
1045 failed. The ``addr'' and ``endaddr'' fields may have already
1046 been relocated. If so, the relocation offset (i.e. the
1047 ANOFFSET value) needs to be subtracted from these values when
1048 performing the comparison. We unconditionally subtract it,
1049 because, when no relocation has been performed, the ANOFFSET
1050 value will simply be zero.
1052 The address of the symbol whose section we're fixing up HAS
1053 NOT BEEN adjusted (relocated) yet. It can't have been since
1054 the section isn't yet known and knowing the section is
1055 necessary in order to add the correct relocation value. In
1056 other words, we wouldn't even be in this function (attempting
1057 to compute the section) if it were already known.
1059 Note that it is possible to search the minimal symbols
1060 (subtracting the relocation value if necessary) to find the
1061 matching minimal symbol, but this is overkill and much less
1062 efficient. It is not necessary to find the matching minimal
1063 symbol, only its section.
1065 Note that this technique (of doing a section table search)
1066 can fail when unrelocated section addresses overlap. For
1067 this reason, we still attempt a lookup by name prior to doing
1068 a search of the section table. */
1070 struct obj_section *s;
1072 ALL_OBJFILE_OSECTIONS (objfile, s)
1074 int idx = s->the_bfd_section->index;
1075 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1077 if (obj_section_addr (s) - offset <= addr
1078 && addr < obj_section_endaddr (s) - offset)
1080 ginfo->obj_section = s;
1081 ginfo->section = idx;
1089 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1096 if (SYMBOL_OBJ_SECTION (sym))
1099 /* We either have an OBJFILE, or we can get at it from the sym's
1100 symtab. Anything else is a bug. */
1101 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1103 if (objfile == NULL)
1104 objfile = SYMBOL_SYMTAB (sym)->objfile;
1106 /* We should have an objfile by now. */
1107 gdb_assert (objfile);
1109 switch (SYMBOL_CLASS (sym))
1113 addr = SYMBOL_VALUE_ADDRESS (sym);
1116 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1120 /* Nothing else will be listed in the minsyms -- no use looking
1125 fixup_section (&sym->ginfo, addr, objfile);
1130 /* Compute the demangled form of NAME as used by the various symbol
1131 lookup functions. The result is stored in *RESULT_NAME. Returns a
1132 cleanup which can be used to clean up the result.
1134 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1135 Normally, Ada symbol lookups are performed using the encoded name
1136 rather than the demangled name, and so it might seem to make sense
1137 for this function to return an encoded version of NAME.
1138 Unfortunately, we cannot do this, because this function is used in
1139 circumstances where it is not appropriate to try to encode NAME.
1140 For instance, when displaying the frame info, we demangle the name
1141 of each parameter, and then perform a symbol lookup inside our
1142 function using that demangled name. In Ada, certain functions
1143 have internally-generated parameters whose name contain uppercase
1144 characters. Encoding those name would result in those uppercase
1145 characters to become lowercase, and thus cause the symbol lookup
1149 demangle_for_lookup (const char *name, enum language lang,
1150 const char **result_name)
1152 char *demangled_name = NULL;
1153 const char *modified_name = NULL;
1154 struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
1156 modified_name = name;
1158 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1159 lookup, so we can always binary search. */
1160 if (lang == language_cplus)
1162 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1165 modified_name = demangled_name;
1166 make_cleanup (xfree, demangled_name);
1170 /* If we were given a non-mangled name, canonicalize it
1171 according to the language (so far only for C++). */
1172 demangled_name = cp_canonicalize_string (name);
1175 modified_name = demangled_name;
1176 make_cleanup (xfree, demangled_name);
1180 else if (lang == language_java)
1182 demangled_name = cplus_demangle (name,
1183 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1186 modified_name = demangled_name;
1187 make_cleanup (xfree, demangled_name);
1190 else if (lang == language_d)
1192 demangled_name = d_demangle (name, 0);
1195 modified_name = demangled_name;
1196 make_cleanup (xfree, demangled_name);
1199 else if (lang == language_go)
1201 demangled_name = go_demangle (name, 0);
1204 modified_name = demangled_name;
1205 make_cleanup (xfree, demangled_name);
1209 *result_name = modified_name;
1213 /* Find the definition for a specified symbol name NAME
1214 in domain DOMAIN, visible from lexical block BLOCK.
1215 Returns the struct symbol pointer, or zero if no symbol is found.
1216 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1217 NAME is a field of the current implied argument `this'. If so set
1218 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1219 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1220 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1222 /* This function (or rather its subordinates) have a bunch of loops and
1223 it would seem to be attractive to put in some QUIT's (though I'm not really
1224 sure whether it can run long enough to be really important). But there
1225 are a few calls for which it would appear to be bad news to quit
1226 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1227 that there is C++ code below which can error(), but that probably
1228 doesn't affect these calls since they are looking for a known
1229 variable and thus can probably assume it will never hit the C++
1233 lookup_symbol_in_language (const char *name, const struct block *block,
1234 const domain_enum domain, enum language lang,
1235 struct field_of_this_result *is_a_field_of_this)
1237 const char *modified_name;
1238 struct symbol *returnval;
1239 struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name);
1241 returnval = lookup_symbol_aux (modified_name, block, domain, lang,
1242 is_a_field_of_this);
1243 do_cleanups (cleanup);
1248 /* Behave like lookup_symbol_in_language, but performed with the
1249 current language. */
1252 lookup_symbol (const char *name, const struct block *block,
1254 struct field_of_this_result *is_a_field_of_this)
1256 return lookup_symbol_in_language (name, block, domain,
1257 current_language->la_language,
1258 is_a_field_of_this);
1261 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1262 found, or NULL if not found. */
1265 lookup_language_this (const struct language_defn *lang,
1266 const struct block *block)
1268 if (lang->la_name_of_this == NULL || block == NULL)
1275 sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN);
1278 block_found = block;
1281 if (BLOCK_FUNCTION (block))
1283 block = BLOCK_SUPERBLOCK (block);
1289 /* Given TYPE, a structure/union,
1290 return 1 if the component named NAME from the ultimate target
1291 structure/union is defined, otherwise, return 0. */
1294 check_field (struct type *type, const char *name,
1295 struct field_of_this_result *is_a_field_of_this)
1299 /* The type may be a stub. */
1300 CHECK_TYPEDEF (type);
1302 for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
1304 const char *t_field_name = TYPE_FIELD_NAME (type, i);
1306 if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
1308 is_a_field_of_this->type = type;
1309 is_a_field_of_this->field = &TYPE_FIELD (type, i);
1314 /* C++: If it was not found as a data field, then try to return it
1315 as a pointer to a method. */
1317 for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
1319 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0)
1321 is_a_field_of_this->type = type;
1322 is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i);
1327 for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
1328 if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this))
1334 /* Behave like lookup_symbol except that NAME is the natural name
1335 (e.g., demangled name) of the symbol that we're looking for. */
1337 static struct symbol *
1338 lookup_symbol_aux (const char *name, const struct block *block,
1339 const domain_enum domain, enum language language,
1340 struct field_of_this_result *is_a_field_of_this)
1343 const struct language_defn *langdef;
1345 /* Make sure we do something sensible with is_a_field_of_this, since
1346 the callers that set this parameter to some non-null value will
1347 certainly use it later. If we don't set it, the contents of
1348 is_a_field_of_this are undefined. */
1349 if (is_a_field_of_this != NULL)
1350 memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this));
1352 /* Search specified block and its superiors. Don't search
1353 STATIC_BLOCK or GLOBAL_BLOCK. */
1355 sym = lookup_symbol_aux_local (name, block, domain, language);
1359 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1360 check to see if NAME is a field of `this'. */
1362 langdef = language_def (language);
1364 /* Don't do this check if we are searching for a struct. It will
1365 not be found by check_field, but will be found by other
1367 if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN)
1369 struct symbol *sym = lookup_language_this (langdef, block);
1373 struct type *t = sym->type;
1375 /* I'm not really sure that type of this can ever
1376 be typedefed; just be safe. */
1378 if (TYPE_CODE (t) == TYPE_CODE_PTR
1379 || TYPE_CODE (t) == TYPE_CODE_REF)
1380 t = TYPE_TARGET_TYPE (t);
1382 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1383 && TYPE_CODE (t) != TYPE_CODE_UNION)
1384 error (_("Internal error: `%s' is not an aggregate"),
1385 langdef->la_name_of_this);
1387 if (check_field (t, name, is_a_field_of_this))
1392 /* Now do whatever is appropriate for LANGUAGE to look
1393 up static and global variables. */
1395 sym = langdef->la_lookup_symbol_nonlocal (name, block, domain);
1399 /* Now search all static file-level symbols. Not strictly correct,
1400 but more useful than an error. */
1402 return lookup_static_symbol_aux (name, domain);
1405 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1406 first, then check the psymtabs. If a psymtab indicates the existence of the
1407 desired name as a file-level static, then do psymtab-to-symtab conversion on
1408 the fly and return the found symbol. */
1411 lookup_static_symbol_aux (const char *name, const domain_enum domain)
1413 struct objfile *objfile;
1416 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain);
1420 ALL_OBJFILES (objfile)
1422 sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain);
1430 /* Check to see if the symbol is defined in BLOCK or its superiors.
1431 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1433 static struct symbol *
1434 lookup_symbol_aux_local (const char *name, const struct block *block,
1435 const domain_enum domain,
1436 enum language language)
1439 const struct block *static_block = block_static_block (block);
1440 const char *scope = block_scope (block);
1442 /* Check if either no block is specified or it's a global block. */
1444 if (static_block == NULL)
1447 while (block != static_block)
1449 sym = lookup_symbol_aux_block (name, block, domain);
1453 if (language == language_cplus || language == language_fortran)
1455 sym = cp_lookup_symbol_imports_or_template (scope, name, block,
1461 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
1463 block = BLOCK_SUPERBLOCK (block);
1466 /* We've reached the edge of the function without finding a result. */
1471 /* Look up OBJFILE to BLOCK. */
1474 lookup_objfile_from_block (const struct block *block)
1476 struct objfile *obj;
1482 block = block_global_block (block);
1483 /* Go through SYMTABS. */
1484 ALL_SYMTABS (obj, s)
1485 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1487 if (obj->separate_debug_objfile_backlink)
1488 obj = obj->separate_debug_objfile_backlink;
1496 /* Look up a symbol in a block; if found, fixup the symbol, and set
1497 block_found appropriately. */
1500 lookup_symbol_aux_block (const char *name, const struct block *block,
1501 const domain_enum domain)
1505 sym = lookup_block_symbol (block, name, domain);
1508 block_found = block;
1509 return fixup_symbol_section (sym, NULL);
1515 /* Check all global symbols in OBJFILE in symtabs and
1519 lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
1521 const domain_enum domain)
1523 const struct objfile *objfile;
1525 struct blockvector *bv;
1526 const struct block *block;
1529 for (objfile = main_objfile;
1531 objfile = objfile_separate_debug_iterate (main_objfile, objfile))
1533 /* Go through symtabs. */
1534 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1536 bv = BLOCKVECTOR (s);
1537 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1538 sym = lookup_block_symbol (block, name, domain);
1541 block_found = block;
1542 return fixup_symbol_section (sym, (struct objfile *)objfile);
1546 sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK,
1555 /* Check to see if the symbol is defined in one of the OBJFILE's
1556 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1557 depending on whether or not we want to search global symbols or
1560 static struct symbol *
1561 lookup_symbol_aux_objfile (struct objfile *objfile, int block_index,
1562 const char *name, const domain_enum domain)
1564 struct symbol *sym = NULL;
1565 struct blockvector *bv;
1566 const struct block *block;
1569 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1571 bv = BLOCKVECTOR (s);
1572 block = BLOCKVECTOR_BLOCK (bv, block_index);
1573 sym = lookup_block_symbol (block, name, domain);
1576 block_found = block;
1577 return fixup_symbol_section (sym, objfile);
1584 /* Same as lookup_symbol_aux_objfile, except that it searches all
1585 objfiles. Return the first match found. */
1587 static struct symbol *
1588 lookup_symbol_aux_symtabs (int block_index, const char *name,
1589 const domain_enum domain)
1592 struct objfile *objfile;
1594 ALL_OBJFILES (objfile)
1596 sym = lookup_symbol_aux_objfile (objfile, block_index, name, domain);
1604 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1605 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1606 and all related objfiles. */
1608 static struct symbol *
1609 lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
1610 const char *linkage_name,
1613 enum language lang = current_language->la_language;
1614 const char *modified_name;
1615 struct cleanup *cleanup = demangle_for_lookup (linkage_name, lang,
1617 struct objfile *main_objfile, *cur_objfile;
1619 if (objfile->separate_debug_objfile_backlink)
1620 main_objfile = objfile->separate_debug_objfile_backlink;
1622 main_objfile = objfile;
1624 for (cur_objfile = main_objfile;
1626 cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile))
1630 sym = lookup_symbol_aux_objfile (cur_objfile, GLOBAL_BLOCK,
1631 modified_name, domain);
1633 sym = lookup_symbol_aux_objfile (cur_objfile, STATIC_BLOCK,
1634 modified_name, domain);
1637 do_cleanups (cleanup);
1642 do_cleanups (cleanup);
1646 /* A helper function for lookup_symbol_aux that interfaces with the
1647 "quick" symbol table functions. */
1649 static struct symbol *
1650 lookup_symbol_aux_quick (struct objfile *objfile, int kind,
1651 const char *name, const domain_enum domain)
1653 struct symtab *symtab;
1654 struct blockvector *bv;
1655 const struct block *block;
1660 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain);
1664 bv = BLOCKVECTOR (symtab);
1665 block = BLOCKVECTOR_BLOCK (bv, kind);
1666 sym = lookup_block_symbol (block, name, domain);
1669 /* This shouldn't be necessary, but as a last resort try
1670 looking in the statics even though the psymtab claimed
1671 the symbol was global, or vice-versa. It's possible
1672 that the psymtab gets it wrong in some cases. */
1674 /* FIXME: carlton/2002-09-30: Should we really do that?
1675 If that happens, isn't it likely to be a GDB error, in
1676 which case we should fix the GDB error rather than
1677 silently dealing with it here? So I'd vote for
1678 removing the check for the symbol in the other
1680 block = BLOCKVECTOR_BLOCK (bv,
1681 kind == GLOBAL_BLOCK ?
1682 STATIC_BLOCK : GLOBAL_BLOCK);
1683 sym = lookup_block_symbol (block, name, domain);
1686 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1687 %s may be an inlined function, or may be a template function\n\
1688 (if a template, try specifying an instantiation: %s<type>)."),
1689 kind == GLOBAL_BLOCK ? "global" : "static",
1690 name, symtab->filename, name, name);
1692 return fixup_symbol_section (sym, objfile);
1695 /* A default version of lookup_symbol_nonlocal for use by languages
1696 that can't think of anything better to do. This implements the C
1700 basic_lookup_symbol_nonlocal (const char *name,
1701 const struct block *block,
1702 const domain_enum domain)
1706 /* NOTE: carlton/2003-05-19: The comments below were written when
1707 this (or what turned into this) was part of lookup_symbol_aux;
1708 I'm much less worried about these questions now, since these
1709 decisions have turned out well, but I leave these comments here
1712 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1713 not it would be appropriate to search the current global block
1714 here as well. (That's what this code used to do before the
1715 is_a_field_of_this check was moved up.) On the one hand, it's
1716 redundant with the lookup_symbol_aux_symtabs search that happens
1717 next. On the other hand, if decode_line_1 is passed an argument
1718 like filename:var, then the user presumably wants 'var' to be
1719 searched for in filename. On the third hand, there shouldn't be
1720 multiple global variables all of which are named 'var', and it's
1721 not like decode_line_1 has ever restricted its search to only
1722 global variables in a single filename. All in all, only
1723 searching the static block here seems best: it's correct and it's
1726 /* NOTE: carlton/2002-12-05: There's also a possible performance
1727 issue here: if you usually search for global symbols in the
1728 current file, then it would be slightly better to search the
1729 current global block before searching all the symtabs. But there
1730 are other factors that have a much greater effect on performance
1731 than that one, so I don't think we should worry about that for
1734 sym = lookup_symbol_static (name, block, domain);
1738 return lookup_symbol_global (name, block, domain);
1741 /* Lookup a symbol in the static block associated to BLOCK, if there
1742 is one; do nothing if BLOCK is NULL or a global block. */
1745 lookup_symbol_static (const char *name,
1746 const struct block *block,
1747 const domain_enum domain)
1749 const struct block *static_block = block_static_block (block);
1751 if (static_block != NULL)
1752 return lookup_symbol_aux_block (name, static_block, domain);
1757 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1759 struct global_sym_lookup_data
1761 /* The name of the symbol we are searching for. */
1764 /* The domain to use for our search. */
1767 /* The field where the callback should store the symbol if found.
1768 It should be initialized to NULL before the search is started. */
1769 struct symbol *result;
1772 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1773 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1774 OBJFILE. The arguments for the search are passed via CB_DATA,
1775 which in reality is a pointer to struct global_sym_lookup_data. */
1778 lookup_symbol_global_iterator_cb (struct objfile *objfile,
1781 struct global_sym_lookup_data *data =
1782 (struct global_sym_lookup_data *) cb_data;
1784 gdb_assert (data->result == NULL);
1786 data->result = lookup_symbol_aux_objfile (objfile, GLOBAL_BLOCK,
1787 data->name, data->domain);
1788 if (data->result == NULL)
1789 data->result = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK,
1790 data->name, data->domain);
1792 /* If we found a match, tell the iterator to stop. Otherwise,
1794 return (data->result != NULL);
1797 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1801 lookup_symbol_global (const char *name,
1802 const struct block *block,
1803 const domain_enum domain)
1805 struct symbol *sym = NULL;
1806 struct objfile *objfile = NULL;
1807 struct global_sym_lookup_data lookup_data;
1809 /* Call library-specific lookup procedure. */
1810 objfile = lookup_objfile_from_block (block);
1811 if (objfile != NULL)
1812 sym = solib_global_lookup (objfile, name, domain);
1816 memset (&lookup_data, 0, sizeof (lookup_data));
1817 lookup_data.name = name;
1818 lookup_data.domain = domain;
1819 gdbarch_iterate_over_objfiles_in_search_order
1820 (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (),
1821 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
1823 return lookup_data.result;
1827 symbol_matches_domain (enum language symbol_language,
1828 domain_enum symbol_domain,
1831 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1832 A Java class declaration also defines a typedef for the class.
1833 Similarly, any Ada type declaration implicitly defines a typedef. */
1834 if (symbol_language == language_cplus
1835 || symbol_language == language_d
1836 || symbol_language == language_java
1837 || symbol_language == language_ada)
1839 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1840 && symbol_domain == STRUCT_DOMAIN)
1843 /* For all other languages, strict match is required. */
1844 return (symbol_domain == domain);
1847 /* Look up a type named NAME in the struct_domain. The type returned
1848 must not be opaque -- i.e., must have at least one field
1852 lookup_transparent_type (const char *name)
1854 return current_language->la_lookup_transparent_type (name);
1857 /* A helper for basic_lookup_transparent_type that interfaces with the
1858 "quick" symbol table functions. */
1860 static struct type *
1861 basic_lookup_transparent_type_quick (struct objfile *objfile, int kind,
1864 struct symtab *symtab;
1865 struct blockvector *bv;
1866 struct block *block;
1871 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN);
1875 bv = BLOCKVECTOR (symtab);
1876 block = BLOCKVECTOR_BLOCK (bv, kind);
1877 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1880 int other_kind = kind == GLOBAL_BLOCK ? STATIC_BLOCK : GLOBAL_BLOCK;
1882 /* This shouldn't be necessary, but as a last resort
1883 * try looking in the 'other kind' even though the psymtab
1884 * claimed the symbol was one thing. It's possible that
1885 * the psymtab gets it wrong in some cases.
1887 block = BLOCKVECTOR_BLOCK (bv, other_kind);
1888 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1890 /* FIXME; error is wrong in one case. */
1892 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1893 %s may be an inlined function, or may be a template function\n\
1894 (if a template, try specifying an instantiation: %s<type>)."),
1895 name, symtab->filename, name, name);
1897 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1898 return SYMBOL_TYPE (sym);
1903 /* The standard implementation of lookup_transparent_type. This code
1904 was modeled on lookup_symbol -- the parts not relevant to looking
1905 up types were just left out. In particular it's assumed here that
1906 types are available in struct_domain and only at file-static or
1910 basic_lookup_transparent_type (const char *name)
1913 struct symtab *s = NULL;
1914 struct blockvector *bv;
1915 struct objfile *objfile;
1916 struct block *block;
1919 /* Now search all the global symbols. Do the symtab's first, then
1920 check the psymtab's. If a psymtab indicates the existence
1921 of the desired name as a global, then do psymtab-to-symtab
1922 conversion on the fly and return the found symbol. */
1924 ALL_OBJFILES (objfile)
1926 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1928 bv = BLOCKVECTOR (s);
1929 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1930 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1931 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1933 return SYMBOL_TYPE (sym);
1938 ALL_OBJFILES (objfile)
1940 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
1945 /* Now search the static file-level symbols.
1946 Not strictly correct, but more useful than an error.
1947 Do the symtab's first, then
1948 check the psymtab's. If a psymtab indicates the existence
1949 of the desired name as a file-level static, then do psymtab-to-symtab
1950 conversion on the fly and return the found symbol. */
1952 ALL_OBJFILES (objfile)
1954 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1956 bv = BLOCKVECTOR (s);
1957 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1958 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1959 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1961 return SYMBOL_TYPE (sym);
1966 ALL_OBJFILES (objfile)
1968 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
1973 return (struct type *) 0;
1976 /* Find the name of the file containing main(). */
1977 /* FIXME: What about languages without main() or specially linked
1978 executables that have no main() ? */
1981 find_main_filename (void)
1983 struct objfile *objfile;
1984 char *name = main_name ();
1986 ALL_OBJFILES (objfile)
1992 result = objfile->sf->qf->find_symbol_file (objfile, name);
1999 /* Search BLOCK for symbol NAME in DOMAIN.
2001 Note that if NAME is the demangled form of a C++ symbol, we will fail
2002 to find a match during the binary search of the non-encoded names, but
2003 for now we don't worry about the slight inefficiency of looking for
2004 a match we'll never find, since it will go pretty quick. Once the
2005 binary search terminates, we drop through and do a straight linear
2006 search on the symbols. Each symbol which is marked as being a ObjC/C++
2007 symbol (language_cplus or language_objc set) has both the encoded and
2008 non-encoded names tested for a match. */
2011 lookup_block_symbol (const struct block *block, const char *name,
2012 const domain_enum domain)
2014 struct block_iterator iter;
2017 if (!BLOCK_FUNCTION (block))
2019 for (sym = block_iter_name_first (block, name, &iter);
2021 sym = block_iter_name_next (name, &iter))
2023 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2024 SYMBOL_DOMAIN (sym), domain))
2031 /* Note that parameter symbols do not always show up last in the
2032 list; this loop makes sure to take anything else other than
2033 parameter symbols first; it only uses parameter symbols as a
2034 last resort. Note that this only takes up extra computation
2037 struct symbol *sym_found = NULL;
2039 for (sym = block_iter_name_first (block, name, &iter);
2041 sym = block_iter_name_next (name, &iter))
2043 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2044 SYMBOL_DOMAIN (sym), domain))
2047 if (!SYMBOL_IS_ARGUMENT (sym))
2053 return (sym_found); /* Will be NULL if not found. */
2057 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
2060 For each symbol that matches, CALLBACK is called. The symbol and
2061 DATA are passed to the callback.
2063 If CALLBACK returns zero, the iteration ends. Otherwise, the
2064 search continues. This function iterates upward through blocks.
2065 When the outermost block has been finished, the function
2069 iterate_over_symbols (const struct block *block, const char *name,
2070 const domain_enum domain,
2071 symbol_found_callback_ftype *callback,
2076 struct block_iterator iter;
2079 for (sym = block_iter_name_first (block, name, &iter);
2081 sym = block_iter_name_next (name, &iter))
2083 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2084 SYMBOL_DOMAIN (sym), domain))
2086 if (!callback (sym, data))
2091 block = BLOCK_SUPERBLOCK (block);
2095 /* Find the symtab associated with PC and SECTION. Look through the
2096 psymtabs and read in another symtab if necessary. */
2099 find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
2102 struct blockvector *bv;
2103 struct symtab *s = NULL;
2104 struct symtab *best_s = NULL;
2105 struct objfile *objfile;
2106 struct program_space *pspace;
2107 CORE_ADDR distance = 0;
2108 struct minimal_symbol *msymbol;
2110 pspace = current_program_space;
2112 /* If we know that this is not a text address, return failure. This is
2113 necessary because we loop based on the block's high and low code
2114 addresses, which do not include the data ranges, and because
2115 we call find_pc_sect_psymtab which has a similar restriction based
2116 on the partial_symtab's texthigh and textlow. */
2117 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
2119 && (MSYMBOL_TYPE (msymbol) == mst_data
2120 || MSYMBOL_TYPE (msymbol) == mst_bss
2121 || MSYMBOL_TYPE (msymbol) == mst_abs
2122 || MSYMBOL_TYPE (msymbol) == mst_file_data
2123 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
2126 /* Search all symtabs for the one whose file contains our address, and which
2127 is the smallest of all the ones containing the address. This is designed
2128 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2129 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2130 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2132 This happens for native ecoff format, where code from included files
2133 gets its own symtab. The symtab for the included file should have
2134 been read in already via the dependency mechanism.
2135 It might be swifter to create several symtabs with the same name
2136 like xcoff does (I'm not sure).
2138 It also happens for objfiles that have their functions reordered.
2139 For these, the symtab we are looking for is not necessarily read in. */
2141 ALL_PRIMARY_SYMTABS (objfile, s)
2143 bv = BLOCKVECTOR (s);
2144 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2146 if (BLOCK_START (b) <= pc
2147 && BLOCK_END (b) > pc
2149 || BLOCK_END (b) - BLOCK_START (b) < distance))
2151 /* For an objfile that has its functions reordered,
2152 find_pc_psymtab will find the proper partial symbol table
2153 and we simply return its corresponding symtab. */
2154 /* In order to better support objfiles that contain both
2155 stabs and coff debugging info, we continue on if a psymtab
2157 if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
2159 struct symtab *result;
2162 = objfile->sf->qf->find_pc_sect_symtab (objfile,
2171 struct block_iterator iter;
2172 struct symbol *sym = NULL;
2174 ALL_BLOCK_SYMBOLS (b, iter, sym)
2176 fixup_symbol_section (sym, objfile);
2177 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
2181 continue; /* No symbol in this symtab matches
2184 distance = BLOCK_END (b) - BLOCK_START (b);
2192 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2194 ALL_OBJFILES (objfile)
2196 struct symtab *result;
2200 result = objfile->sf->qf->find_pc_sect_symtab (objfile,
2211 /* Find the symtab associated with PC. Look through the psymtabs and read
2212 in another symtab if necessary. Backward compatibility, no section. */
2215 find_pc_symtab (CORE_ADDR pc)
2217 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2221 /* Find the source file and line number for a given PC value and SECTION.
2222 Return a structure containing a symtab pointer, a line number,
2223 and a pc range for the entire source line.
2224 The value's .pc field is NOT the specified pc.
2225 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2226 use the line that ends there. Otherwise, in that case, the line
2227 that begins there is used. */
2229 /* The big complication here is that a line may start in one file, and end just
2230 before the start of another file. This usually occurs when you #include
2231 code in the middle of a subroutine. To properly find the end of a line's PC
2232 range, we must search all symtabs associated with this compilation unit, and
2233 find the one whose first PC is closer than that of the next line in this
2236 /* If it's worth the effort, we could be using a binary search. */
2238 struct symtab_and_line
2239 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
2242 struct linetable *l;
2245 struct linetable_entry *item;
2246 struct symtab_and_line val;
2247 struct blockvector *bv;
2248 struct minimal_symbol *msymbol;
2249 struct minimal_symbol *mfunsym;
2250 struct objfile *objfile;
2252 /* Info on best line seen so far, and where it starts, and its file. */
2254 struct linetable_entry *best = NULL;
2255 CORE_ADDR best_end = 0;
2256 struct symtab *best_symtab = 0;
2258 /* Store here the first line number
2259 of a file which contains the line at the smallest pc after PC.
2260 If we don't find a line whose range contains PC,
2261 we will use a line one less than this,
2262 with a range from the start of that file to the first line's pc. */
2263 struct linetable_entry *alt = NULL;
2264 struct symtab *alt_symtab = 0;
2266 /* Info on best line seen in this file. */
2268 struct linetable_entry *prev;
2270 /* If this pc is not from the current frame,
2271 it is the address of the end of a call instruction.
2272 Quite likely that is the start of the following statement.
2273 But what we want is the statement containing the instruction.
2274 Fudge the pc to make sure we get that. */
2276 init_sal (&val); /* initialize to zeroes */
2278 val.pspace = current_program_space;
2280 /* It's tempting to assume that, if we can't find debugging info for
2281 any function enclosing PC, that we shouldn't search for line
2282 number info, either. However, GAS can emit line number info for
2283 assembly files --- very helpful when debugging hand-written
2284 assembly code. In such a case, we'd have no debug info for the
2285 function, but we would have line info. */
2290 /* elz: added this because this function returned the wrong
2291 information if the pc belongs to a stub (import/export)
2292 to call a shlib function. This stub would be anywhere between
2293 two functions in the target, and the line info was erroneously
2294 taken to be the one of the line before the pc. */
2296 /* RT: Further explanation:
2298 * We have stubs (trampolines) inserted between procedures.
2300 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2301 * exists in the main image.
2303 * In the minimal symbol table, we have a bunch of symbols
2304 * sorted by start address. The stubs are marked as "trampoline",
2305 * the others appear as text. E.g.:
2307 * Minimal symbol table for main image
2308 * main: code for main (text symbol)
2309 * shr1: stub (trampoline symbol)
2310 * foo: code for foo (text symbol)
2312 * Minimal symbol table for "shr1" image:
2314 * shr1: code for shr1 (text symbol)
2317 * So the code below is trying to detect if we are in the stub
2318 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2319 * and if found, do the symbolization from the real-code address
2320 * rather than the stub address.
2322 * Assumptions being made about the minimal symbol table:
2323 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2324 * if we're really in the trampoline.s If we're beyond it (say
2325 * we're in "foo" in the above example), it'll have a closer
2326 * symbol (the "foo" text symbol for example) and will not
2327 * return the trampoline.
2328 * 2. lookup_minimal_symbol_text() will find a real text symbol
2329 * corresponding to the trampoline, and whose address will
2330 * be different than the trampoline address. I put in a sanity
2331 * check for the address being the same, to avoid an
2332 * infinite recursion.
2334 msymbol = lookup_minimal_symbol_by_pc (pc);
2335 if (msymbol != NULL)
2336 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2338 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2340 if (mfunsym == NULL)
2341 /* I eliminated this warning since it is coming out
2342 * in the following situation:
2343 * gdb shmain // test program with shared libraries
2344 * (gdb) break shr1 // function in shared lib
2345 * Warning: In stub for ...
2346 * In the above situation, the shared lib is not loaded yet,
2347 * so of course we can't find the real func/line info,
2348 * but the "break" still works, and the warning is annoying.
2349 * So I commented out the warning. RT */
2350 /* warning ("In stub for %s; unable to find real function/line info",
2351 SYMBOL_LINKAGE_NAME (msymbol)); */
2354 else if (SYMBOL_VALUE_ADDRESS (mfunsym)
2355 == SYMBOL_VALUE_ADDRESS (msymbol))
2356 /* Avoid infinite recursion */
2357 /* See above comment about why warning is commented out. */
2358 /* warning ("In stub for %s; unable to find real function/line info",
2359 SYMBOL_LINKAGE_NAME (msymbol)); */
2363 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2367 s = find_pc_sect_symtab (pc, section);
2370 /* If no symbol information, return previous pc. */
2377 bv = BLOCKVECTOR (s);
2378 objfile = s->objfile;
2380 /* Look at all the symtabs that share this blockvector.
2381 They all have the same apriori range, that we found was right;
2382 but they have different line tables. */
2384 ALL_OBJFILE_SYMTABS (objfile, s)
2386 if (BLOCKVECTOR (s) != bv)
2389 /* Find the best line in this symtab. */
2396 /* I think len can be zero if the symtab lacks line numbers
2397 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2398 I'm not sure which, and maybe it depends on the symbol
2404 item = l->item; /* Get first line info. */
2406 /* Is this file's first line closer than the first lines of other files?
2407 If so, record this file, and its first line, as best alternate. */
2408 if (item->pc > pc && (!alt || item->pc < alt->pc))
2414 for (i = 0; i < len; i++, item++)
2416 /* Leave prev pointing to the linetable entry for the last line
2417 that started at or before PC. */
2424 /* At this point, prev points at the line whose start addr is <= pc, and
2425 item points at the next line. If we ran off the end of the linetable
2426 (pc >= start of the last line), then prev == item. If pc < start of
2427 the first line, prev will not be set. */
2429 /* Is this file's best line closer than the best in the other files?
2430 If so, record this file, and its best line, as best so far. Don't
2431 save prev if it represents the end of a function (i.e. line number
2432 0) instead of a real line. */
2434 if (prev && prev->line && (!best || prev->pc > best->pc))
2439 /* Discard BEST_END if it's before the PC of the current BEST. */
2440 if (best_end <= best->pc)
2444 /* If another line (denoted by ITEM) is in the linetable and its
2445 PC is after BEST's PC, but before the current BEST_END, then
2446 use ITEM's PC as the new best_end. */
2447 if (best && i < len && item->pc > best->pc
2448 && (best_end == 0 || best_end > item->pc))
2449 best_end = item->pc;
2454 /* If we didn't find any line number info, just return zeros.
2455 We used to return alt->line - 1 here, but that could be
2456 anywhere; if we don't have line number info for this PC,
2457 don't make some up. */
2460 else if (best->line == 0)
2462 /* If our best fit is in a range of PC's for which no line
2463 number info is available (line number is zero) then we didn't
2464 find any valid line information. */
2469 val.symtab = best_symtab;
2470 val.line = best->line;
2472 if (best_end && (!alt || best_end < alt->pc))
2477 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2479 val.section = section;
2483 /* Backward compatibility (no section). */
2485 struct symtab_and_line
2486 find_pc_line (CORE_ADDR pc, int notcurrent)
2488 struct obj_section *section;
2490 section = find_pc_overlay (pc);
2491 if (pc_in_unmapped_range (pc, section))
2492 pc = overlay_mapped_address (pc, section);
2493 return find_pc_sect_line (pc, section, notcurrent);
2496 /* Find line number LINE in any symtab whose name is the same as
2499 If found, return the symtab that contains the linetable in which it was
2500 found, set *INDEX to the index in the linetable of the best entry
2501 found, and set *EXACT_MATCH nonzero if the value returned is an
2504 If not found, return NULL. */
2507 find_line_symtab (struct symtab *symtab, int line,
2508 int *index, int *exact_match)
2510 int exact = 0; /* Initialized here to avoid a compiler warning. */
2512 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2516 struct linetable *best_linetable;
2517 struct symtab *best_symtab;
2519 /* First try looking it up in the given symtab. */
2520 best_linetable = LINETABLE (symtab);
2521 best_symtab = symtab;
2522 best_index = find_line_common (best_linetable, line, &exact, 0);
2523 if (best_index < 0 || !exact)
2525 /* Didn't find an exact match. So we better keep looking for
2526 another symtab with the same name. In the case of xcoff,
2527 multiple csects for one source file (produced by IBM's FORTRAN
2528 compiler) produce multiple symtabs (this is unavoidable
2529 assuming csects can be at arbitrary places in memory and that
2530 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2532 /* BEST is the smallest linenumber > LINE so far seen,
2533 or 0 if none has been seen so far.
2534 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2537 struct objfile *objfile;
2540 if (best_index >= 0)
2541 best = best_linetable->item[best_index].line;
2545 ALL_OBJFILES (objfile)
2548 objfile->sf->qf->expand_symtabs_with_filename (objfile,
2552 ALL_SYMTABS (objfile, s)
2554 struct linetable *l;
2557 if (FILENAME_CMP (symtab->filename, s->filename) != 0)
2559 if (FILENAME_CMP (symtab_to_fullname (symtab),
2560 symtab_to_fullname (s)) != 0)
2563 ind = find_line_common (l, line, &exact, 0);
2573 if (best == 0 || l->item[ind].line < best)
2575 best = l->item[ind].line;
2588 *index = best_index;
2590 *exact_match = exact;
2595 /* Given SYMTAB, returns all the PCs function in the symtab that
2596 exactly match LINE. Returns NULL if there are no exact matches,
2597 but updates BEST_ITEM in this case. */
2600 find_pcs_for_symtab_line (struct symtab *symtab, int line,
2601 struct linetable_entry **best_item)
2604 struct symbol *previous_function = NULL;
2605 VEC (CORE_ADDR) *result = NULL;
2607 /* First, collect all the PCs that are at this line. */
2613 idx = find_line_common (LINETABLE (symtab), line, &was_exact, start);
2619 struct linetable_entry *item = &LINETABLE (symtab)->item[idx];
2621 if (*best_item == NULL || item->line < (*best_item)->line)
2627 VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc);
2635 /* Set the PC value for a given source file and line number and return true.
2636 Returns zero for invalid line number (and sets the PC to 0).
2637 The source file is specified with a struct symtab. */
2640 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2642 struct linetable *l;
2649 symtab = find_line_symtab (symtab, line, &ind, NULL);
2652 l = LINETABLE (symtab);
2653 *pc = l->item[ind].pc;
2660 /* Find the range of pc values in a line.
2661 Store the starting pc of the line into *STARTPTR
2662 and the ending pc (start of next line) into *ENDPTR.
2663 Returns 1 to indicate success.
2664 Returns 0 if could not find the specified line. */
2667 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2670 CORE_ADDR startaddr;
2671 struct symtab_and_line found_sal;
2674 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2677 /* This whole function is based on address. For example, if line 10 has
2678 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2679 "info line *0x123" should say the line goes from 0x100 to 0x200
2680 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2681 This also insures that we never give a range like "starts at 0x134
2682 and ends at 0x12c". */
2684 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2685 if (found_sal.line != sal.line)
2687 /* The specified line (sal) has zero bytes. */
2688 *startptr = found_sal.pc;
2689 *endptr = found_sal.pc;
2693 *startptr = found_sal.pc;
2694 *endptr = found_sal.end;
2699 /* Given a line table and a line number, return the index into the line
2700 table for the pc of the nearest line whose number is >= the specified one.
2701 Return -1 if none is found. The value is >= 0 if it is an index.
2702 START is the index at which to start searching the line table.
2704 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2707 find_line_common (struct linetable *l, int lineno,
2708 int *exact_match, int start)
2713 /* BEST is the smallest linenumber > LINENO so far seen,
2714 or 0 if none has been seen so far.
2715 BEST_INDEX identifies the item for it. */
2717 int best_index = -1;
2728 for (i = start; i < len; i++)
2730 struct linetable_entry *item = &(l->item[i]);
2732 if (item->line == lineno)
2734 /* Return the first (lowest address) entry which matches. */
2739 if (item->line > lineno && (best == 0 || item->line < best))
2746 /* If we got here, we didn't get an exact match. */
2751 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2753 struct symtab_and_line sal;
2755 sal = find_pc_line (pc, 0);
2758 return sal.symtab != 0;
2761 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2762 address for that function that has an entry in SYMTAB's line info
2763 table. If such an entry cannot be found, return FUNC_ADDR
2767 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
2769 CORE_ADDR func_start, func_end;
2770 struct linetable *l;
2773 /* Give up if this symbol has no lineinfo table. */
2774 l = LINETABLE (symtab);
2778 /* Get the range for the function's PC values, or give up if we
2779 cannot, for some reason. */
2780 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
2783 /* Linetable entries are ordered by PC values, see the commentary in
2784 symtab.h where `struct linetable' is defined. Thus, the first
2785 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2786 address we are looking for. */
2787 for (i = 0; i < l->nitems; i++)
2789 struct linetable_entry *item = &(l->item[i]);
2791 /* Don't use line numbers of zero, they mark special entries in
2792 the table. See the commentary on symtab.h before the
2793 definition of struct linetable. */
2794 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
2801 /* Given a function symbol SYM, find the symtab and line for the start
2803 If the argument FUNFIRSTLINE is nonzero, we want the first line
2804 of real code inside the function. */
2806 struct symtab_and_line
2807 find_function_start_sal (struct symbol *sym, int funfirstline)
2809 struct symtab_and_line sal;
2811 fixup_symbol_section (sym, NULL);
2812 sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
2813 SYMBOL_OBJ_SECTION (sym), 0);
2815 /* We always should have a line for the function start address.
2816 If we don't, something is odd. Create a plain SAL refering
2817 just the PC and hope that skip_prologue_sal (if requested)
2818 can find a line number for after the prologue. */
2819 if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym)))
2822 sal.pspace = current_program_space;
2823 sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2824 sal.section = SYMBOL_OBJ_SECTION (sym);
2828 skip_prologue_sal (&sal);
2833 /* Adjust SAL to the first instruction past the function prologue.
2834 If the PC was explicitly specified, the SAL is not changed.
2835 If the line number was explicitly specified, at most the SAL's PC
2836 is updated. If SAL is already past the prologue, then do nothing. */
2839 skip_prologue_sal (struct symtab_and_line *sal)
2842 struct symtab_and_line start_sal;
2843 struct cleanup *old_chain;
2844 CORE_ADDR pc, saved_pc;
2845 struct obj_section *section;
2847 struct objfile *objfile;
2848 struct gdbarch *gdbarch;
2849 struct block *b, *function_block;
2850 int force_skip, skip;
2852 /* Do not change the SAL if PC was specified explicitly. */
2853 if (sal->explicit_pc)
2856 old_chain = save_current_space_and_thread ();
2857 switch_to_program_space_and_thread (sal->pspace);
2859 sym = find_pc_sect_function (sal->pc, sal->section);
2862 fixup_symbol_section (sym, NULL);
2864 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2865 section = SYMBOL_OBJ_SECTION (sym);
2866 name = SYMBOL_LINKAGE_NAME (sym);
2867 objfile = SYMBOL_SYMTAB (sym)->objfile;
2871 struct minimal_symbol *msymbol
2872 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
2874 if (msymbol == NULL)
2876 do_cleanups (old_chain);
2880 pc = SYMBOL_VALUE_ADDRESS (msymbol);
2881 section = SYMBOL_OBJ_SECTION (msymbol);
2882 name = SYMBOL_LINKAGE_NAME (msymbol);
2883 objfile = msymbol_objfile (msymbol);
2886 gdbarch = get_objfile_arch (objfile);
2888 /* Process the prologue in two passes. In the first pass try to skip the
2889 prologue (SKIP is true) and verify there is a real need for it (indicated
2890 by FORCE_SKIP). If no such reason was found run a second pass where the
2891 prologue is not skipped (SKIP is false). */
2896 /* Be conservative - allow direct PC (without skipping prologue) only if we
2897 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2898 have to be set by the caller so we use SYM instead. */
2899 if (sym && SYMBOL_SYMTAB (sym)->locations_valid)
2907 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2908 so that gdbarch_skip_prologue has something unique to work on. */
2909 if (section_is_overlay (section) && !section_is_mapped (section))
2910 pc = overlay_unmapped_address (pc, section);
2912 /* Skip "first line" of function (which is actually its prologue). */
2913 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2915 pc = gdbarch_skip_prologue (gdbarch, pc);
2917 /* For overlays, map pc back into its mapped VMA range. */
2918 pc = overlay_mapped_address (pc, section);
2920 /* Calculate line number. */
2921 start_sal = find_pc_sect_line (pc, section, 0);
2923 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2924 line is still part of the same function. */
2925 if (skip && start_sal.pc != pc
2926 && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
2927 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2928 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section)
2929 == lookup_minimal_symbol_by_pc_section (pc, section))))
2931 /* First pc of next line */
2933 /* Recalculate the line number (might not be N+1). */
2934 start_sal = find_pc_sect_line (pc, section, 0);
2937 /* On targets with executable formats that don't have a concept of
2938 constructors (ELF with .init has, PE doesn't), gcc emits a call
2939 to `__main' in `main' between the prologue and before user
2941 if (gdbarch_skip_main_prologue_p (gdbarch)
2942 && name && strcmp_iw (name, "main") == 0)
2944 pc = gdbarch_skip_main_prologue (gdbarch, pc);
2945 /* Recalculate the line number (might not be N+1). */
2946 start_sal = find_pc_sect_line (pc, section, 0);
2950 while (!force_skip && skip--);
2952 /* If we still don't have a valid source line, try to find the first
2953 PC in the lineinfo table that belongs to the same function. This
2954 happens with COFF debug info, which does not seem to have an
2955 entry in lineinfo table for the code after the prologue which has
2956 no direct relation to source. For example, this was found to be
2957 the case with the DJGPP target using "gcc -gcoff" when the
2958 compiler inserted code after the prologue to make sure the stack
2960 if (!force_skip && sym && start_sal.symtab == NULL)
2962 pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
2963 /* Recalculate the line number. */
2964 start_sal = find_pc_sect_line (pc, section, 0);
2967 do_cleanups (old_chain);
2969 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2970 forward SAL to the end of the prologue. */
2975 sal->section = section;
2977 /* Unless the explicit_line flag was set, update the SAL line
2978 and symtab to correspond to the modified PC location. */
2979 if (sal->explicit_line)
2982 sal->symtab = start_sal.symtab;
2983 sal->line = start_sal.line;
2984 sal->end = start_sal.end;
2986 /* Check if we are now inside an inlined function. If we can,
2987 use the call site of the function instead. */
2988 b = block_for_pc_sect (sal->pc, sal->section);
2989 function_block = NULL;
2992 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
2994 else if (BLOCK_FUNCTION (b) != NULL)
2996 b = BLOCK_SUPERBLOCK (b);
2998 if (function_block != NULL
2999 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
3001 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
3002 sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
3006 /* If P is of the form "operator[ \t]+..." where `...' is
3007 some legitimate operator text, return a pointer to the
3008 beginning of the substring of the operator text.
3009 Otherwise, return "". */
3012 operator_chars (char *p, char **end)
3015 if (strncmp (p, "operator", 8))
3019 /* Don't get faked out by `operator' being part of a longer
3021 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
3024 /* Allow some whitespace between `operator' and the operator symbol. */
3025 while (*p == ' ' || *p == '\t')
3028 /* Recognize 'operator TYPENAME'. */
3030 if (isalpha (*p) || *p == '_' || *p == '$')
3034 while (isalnum (*q) || *q == '_' || *q == '$')
3043 case '\\': /* regexp quoting */
3046 if (p[2] == '=') /* 'operator\*=' */
3048 else /* 'operator\*' */
3052 else if (p[1] == '[')
3055 error (_("mismatched quoting on brackets, "
3056 "try 'operator\\[\\]'"));
3057 else if (p[2] == '\\' && p[3] == ']')
3059 *end = p + 4; /* 'operator\[\]' */
3063 error (_("nothing is allowed between '[' and ']'"));
3067 /* Gratuitous qoute: skip it and move on. */
3089 if (p[0] == '-' && p[1] == '>')
3091 /* Struct pointer member operator 'operator->'. */
3094 *end = p + 3; /* 'operator->*' */
3097 else if (p[2] == '\\')
3099 *end = p + 4; /* Hopefully 'operator->\*' */
3104 *end = p + 2; /* 'operator->' */
3108 if (p[1] == '=' || p[1] == p[0])
3119 error (_("`operator ()' must be specified "
3120 "without whitespace in `()'"));
3125 error (_("`operator ?:' must be specified "
3126 "without whitespace in `?:'"));
3131 error (_("`operator []' must be specified "
3132 "without whitespace in `[]'"));
3136 error (_("`operator %s' not supported"), p);
3145 /* Cache to watch for file names already seen by filename_seen. */
3147 struct filename_seen_cache
3149 /* Table of files seen so far. */
3151 /* Initial size of the table. It automagically grows from here. */
3152 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3155 /* filename_seen_cache constructor. */
3157 static struct filename_seen_cache *
3158 create_filename_seen_cache (void)
3160 struct filename_seen_cache *cache;
3162 cache = XNEW (struct filename_seen_cache);
3163 cache->tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE,
3164 filename_hash, filename_eq,
3165 NULL, xcalloc, xfree);
3170 /* Empty the cache, but do not delete it. */
3173 clear_filename_seen_cache (struct filename_seen_cache *cache)
3175 htab_empty (cache->tab);
3178 /* filename_seen_cache destructor.
3179 This takes a void * argument as it is generally used as a cleanup. */
3182 delete_filename_seen_cache (void *ptr)
3184 struct filename_seen_cache *cache = ptr;
3186 htab_delete (cache->tab);
3190 /* If FILE is not already in the table of files in CACHE, return zero;
3191 otherwise return non-zero. Optionally add FILE to the table if ADD
3194 NOTE: We don't manage space for FILE, we assume FILE lives as long
3195 as the caller needs. */
3198 filename_seen (struct filename_seen_cache *cache, const char *file, int add)
3202 /* Is FILE in tab? */
3203 slot = htab_find_slot (cache->tab, file, add ? INSERT : NO_INSERT);
3207 /* No; maybe add it to tab. */
3209 *slot = (char *) file;
3214 /* Data structure to maintain printing state for output_source_filename. */
3216 struct output_source_filename_data
3218 /* Cache of what we've seen so far. */
3219 struct filename_seen_cache *filename_seen_cache;
3221 /* Flag of whether we're printing the first one. */
3225 /* Slave routine for sources_info. Force line breaks at ,'s.
3226 NAME is the name to print.
3227 DATA contains the state for printing and watching for duplicates. */
3230 output_source_filename (const char *name,
3231 struct output_source_filename_data *data)
3233 /* Since a single source file can result in several partial symbol
3234 tables, we need to avoid printing it more than once. Note: if
3235 some of the psymtabs are read in and some are not, it gets
3236 printed both under "Source files for which symbols have been
3237 read" and "Source files for which symbols will be read in on
3238 demand". I consider this a reasonable way to deal with the
3239 situation. I'm not sure whether this can also happen for
3240 symtabs; it doesn't hurt to check. */
3242 /* Was NAME already seen? */
3243 if (filename_seen (data->filename_seen_cache, name, 1))
3245 /* Yes; don't print it again. */
3249 /* No; print it and reset *FIRST. */
3251 printf_filtered (", ");
3255 fputs_filtered (name, gdb_stdout);
3258 /* A callback for map_partial_symbol_filenames. */
3261 output_partial_symbol_filename (const char *filename, const char *fullname,
3264 output_source_filename (fullname ? fullname : filename, data);
3268 sources_info (char *ignore, int from_tty)
3271 struct objfile *objfile;
3272 struct output_source_filename_data data;
3273 struct cleanup *cleanups;
3275 if (!have_full_symbols () && !have_partial_symbols ())
3277 error (_("No symbol table is loaded. Use the \"file\" command."));
3280 data.filename_seen_cache = create_filename_seen_cache ();
3281 cleanups = make_cleanup (delete_filename_seen_cache,
3282 data.filename_seen_cache);
3284 printf_filtered ("Source files for which symbols have been read in:\n\n");
3287 ALL_SYMTABS (objfile, s)
3289 const char *fullname = symtab_to_fullname (s);
3291 output_source_filename (fullname, &data);
3293 printf_filtered ("\n\n");
3295 printf_filtered ("Source files for which symbols "
3296 "will be read in on demand:\n\n");
3298 clear_filename_seen_cache (data.filename_seen_cache);
3300 map_partial_symbol_filenames (output_partial_symbol_filename, &data,
3301 1 /*need_fullname*/);
3302 printf_filtered ("\n");
3304 do_cleanups (cleanups);
3308 file_matches (const char *file, char *files[], int nfiles)
3312 if (file != NULL && nfiles != 0)
3314 for (i = 0; i < nfiles; i++)
3316 if (filename_cmp (files[i], lbasename (file)) == 0)
3320 else if (nfiles == 0)
3325 /* Free any memory associated with a search. */
3328 free_search_symbols (struct symbol_search *symbols)
3330 struct symbol_search *p;
3331 struct symbol_search *next;
3333 for (p = symbols; p != NULL; p = next)
3341 do_free_search_symbols_cleanup (void *symbols)
3343 free_search_symbols (symbols);
3347 make_cleanup_free_search_symbols (struct symbol_search *symbols)
3349 return make_cleanup (do_free_search_symbols_cleanup, symbols);
3352 /* Helper function for sort_search_symbols and qsort. Can only
3353 sort symbols, not minimal symbols. */
3356 compare_search_syms (const void *sa, const void *sb)
3358 struct symbol_search **sym_a = (struct symbol_search **) sa;
3359 struct symbol_search **sym_b = (struct symbol_search **) sb;
3361 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
3362 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
3365 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3366 prevtail where it is, but update its next pointer to point to
3367 the first of the sorted symbols. */
3369 static struct symbol_search *
3370 sort_search_symbols (struct symbol_search *prevtail, int nfound)
3372 struct symbol_search **symbols, *symp, *old_next;
3375 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
3377 symp = prevtail->next;
3378 for (i = 0; i < nfound; i++)
3383 /* Generally NULL. */
3386 qsort (symbols, nfound, sizeof (struct symbol_search *),
3387 compare_search_syms);
3390 for (i = 0; i < nfound; i++)
3392 symp->next = symbols[i];
3395 symp->next = old_next;
3401 /* An object of this type is passed as the user_data to the
3402 expand_symtabs_matching method. */
3403 struct search_symbols_data
3408 /* It is true if PREG contains valid data, false otherwise. */
3409 unsigned preg_p : 1;
3413 /* A callback for expand_symtabs_matching. */
3416 search_symbols_file_matches (const char *filename, void *user_data)
3418 struct search_symbols_data *data = user_data;
3420 return file_matches (filename, data->files, data->nfiles);
3423 /* A callback for expand_symtabs_matching. */
3426 search_symbols_name_matches (const char *symname, void *user_data)
3428 struct search_symbols_data *data = user_data;
3430 return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0;
3433 /* Search the symbol table for matches to the regular expression REGEXP,
3434 returning the results in *MATCHES.
3436 Only symbols of KIND are searched:
3437 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3438 and constants (enums)
3439 FUNCTIONS_DOMAIN - search all functions
3440 TYPES_DOMAIN - search all type names
3441 ALL_DOMAIN - an internal error for this function
3443 free_search_symbols should be called when *MATCHES is no longer needed.
3445 The results are sorted locally; each symtab's global and static blocks are
3446 separately alphabetized. */
3449 search_symbols (char *regexp, enum search_domain kind,
3450 int nfiles, char *files[],
3451 struct symbol_search **matches)
3454 struct blockvector *bv;
3457 struct block_iterator iter;
3459 struct objfile *objfile;
3460 struct minimal_symbol *msymbol;
3462 static const enum minimal_symbol_type types[]
3463 = {mst_data, mst_text, mst_abs};
3464 static const enum minimal_symbol_type types2[]
3465 = {mst_bss, mst_file_text, mst_abs};
3466 static const enum minimal_symbol_type types3[]
3467 = {mst_file_data, mst_solib_trampoline, mst_abs};
3468 static const enum minimal_symbol_type types4[]
3469 = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
3470 enum minimal_symbol_type ourtype;
3471 enum minimal_symbol_type ourtype2;
3472 enum minimal_symbol_type ourtype3;
3473 enum minimal_symbol_type ourtype4;
3474 struct symbol_search *sr;
3475 struct symbol_search *psr;
3476 struct symbol_search *tail;
3477 struct search_symbols_data datum;
3479 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3480 CLEANUP_CHAIN is freed only in the case of an error. */
3481 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
3482 struct cleanup *retval_chain;
3484 gdb_assert (kind <= TYPES_DOMAIN);
3486 ourtype = types[kind];
3487 ourtype2 = types2[kind];
3488 ourtype3 = types3[kind];
3489 ourtype4 = types4[kind];
3491 sr = *matches = NULL;
3497 /* Make sure spacing is right for C++ operators.
3498 This is just a courtesy to make the matching less sensitive
3499 to how many spaces the user leaves between 'operator'
3500 and <TYPENAME> or <OPERATOR>. */
3502 char *opname = operator_chars (regexp, &opend);
3507 int fix = -1; /* -1 means ok; otherwise number of
3510 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3512 /* There should 1 space between 'operator' and 'TYPENAME'. */
3513 if (opname[-1] != ' ' || opname[-2] == ' ')
3518 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3519 if (opname[-1] == ' ')
3522 /* If wrong number of spaces, fix it. */
3525 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3527 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3532 errcode = regcomp (&datum.preg, regexp,
3533 REG_NOSUB | (case_sensitivity == case_sensitive_off
3537 char *err = get_regcomp_error (errcode, &datum.preg);
3539 make_cleanup (xfree, err);
3540 error (_("Invalid regexp (%s): %s"), err, regexp);
3543 make_regfree_cleanup (&datum.preg);
3546 /* Search through the partial symtabs *first* for all symbols
3547 matching the regexp. That way we don't have to reproduce all of
3548 the machinery below. */
3550 datum.nfiles = nfiles;
3551 datum.files = files;
3552 ALL_OBJFILES (objfile)
3555 objfile->sf->qf->expand_symtabs_matching (objfile,
3558 : search_symbols_file_matches),
3559 search_symbols_name_matches,
3564 retval_chain = old_chain;
3566 /* Here, we search through the minimal symbol tables for functions
3567 and variables that match, and force their symbols to be read.
3568 This is in particular necessary for demangled variable names,
3569 which are no longer put into the partial symbol tables.
3570 The symbol will then be found during the scan of symtabs below.
3572 For functions, find_pc_symtab should succeed if we have debug info
3573 for the function, for variables we have to call
3574 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3576 If the lookup fails, set found_misc so that we will rescan to print
3577 any matching symbols without debug info.
3578 We only search the objfile the msymbol came from, we no longer search
3579 all objfiles. In large programs (1000s of shared libs) searching all
3580 objfiles is not worth the pain. */
3582 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3584 ALL_MSYMBOLS (objfile, msymbol)
3588 if (msymbol->created_by_gdb)
3591 if (MSYMBOL_TYPE (msymbol) == ourtype
3592 || MSYMBOL_TYPE (msymbol) == ourtype2
3593 || MSYMBOL_TYPE (msymbol) == ourtype3
3594 || MSYMBOL_TYPE (msymbol) == ourtype4)
3597 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3600 /* Note: An important side-effect of these lookup functions
3601 is to expand the symbol table if msymbol is found, for the
3602 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3603 if (kind == FUNCTIONS_DOMAIN
3604 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL
3605 : (lookup_symbol_in_objfile_from_linkage_name
3606 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3614 ALL_PRIMARY_SYMTABS (objfile, s)
3616 bv = BLOCKVECTOR (s);
3617 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3619 struct symbol_search *prevtail = tail;
3622 b = BLOCKVECTOR_BLOCK (bv, i);
3623 ALL_BLOCK_SYMBOLS (b, iter, sym)
3625 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3629 if (file_matches (real_symtab->filename, files, nfiles)
3631 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0,
3633 && ((kind == VARIABLES_DOMAIN
3634 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3635 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
3636 && SYMBOL_CLASS (sym) != LOC_BLOCK
3637 /* LOC_CONST can be used for more than just enums,
3638 e.g., c++ static const members.
3639 We only want to skip enums here. */
3640 && !(SYMBOL_CLASS (sym) == LOC_CONST
3641 && TYPE_CODE (SYMBOL_TYPE (sym))
3643 || (kind == FUNCTIONS_DOMAIN
3644 && SYMBOL_CLASS (sym) == LOC_BLOCK)
3645 || (kind == TYPES_DOMAIN
3646 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
3649 psr = (struct symbol_search *)
3650 xmalloc (sizeof (struct symbol_search));
3652 psr->symtab = real_symtab;
3654 psr->msymbol = NULL;
3666 if (prevtail == NULL)
3668 struct symbol_search dummy;
3671 tail = sort_search_symbols (&dummy, nfound);
3674 make_cleanup_free_search_symbols (sr);
3677 tail = sort_search_symbols (prevtail, nfound);
3682 /* If there are no eyes, avoid all contact. I mean, if there are
3683 no debug symbols, then print directly from the msymbol_vector. */
3685 if (found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
3687 ALL_MSYMBOLS (objfile, msymbol)
3691 if (msymbol->created_by_gdb)
3694 if (MSYMBOL_TYPE (msymbol) == ourtype
3695 || MSYMBOL_TYPE (msymbol) == ourtype2
3696 || MSYMBOL_TYPE (msymbol) == ourtype3
3697 || MSYMBOL_TYPE (msymbol) == ourtype4)
3700 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3703 /* For functions we can do a quick check of whether the
3704 symbol might be found via find_pc_symtab. */
3705 if (kind != FUNCTIONS_DOMAIN
3706 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL)
3708 if (lookup_symbol_in_objfile_from_linkage_name
3709 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3713 psr = (struct symbol_search *)
3714 xmalloc (sizeof (struct symbol_search));
3716 psr->msymbol = msymbol;
3723 make_cleanup_free_search_symbols (sr);
3735 discard_cleanups (retval_chain);
3736 do_cleanups (old_chain);
3740 /* Helper function for symtab_symbol_info, this function uses
3741 the data returned from search_symbols() to print information
3742 regarding the match to gdb_stdout. */
3745 print_symbol_info (enum search_domain kind,
3746 struct symtab *s, struct symbol *sym,
3747 int block, char *last)
3749 if (last == NULL || filename_cmp (last, s->filename) != 0)
3751 fputs_filtered ("\nFile ", gdb_stdout);
3752 fputs_filtered (s->filename, gdb_stdout);
3753 fputs_filtered (":\n", gdb_stdout);
3756 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3757 printf_filtered ("static ");
3759 /* Typedef that is not a C++ class. */
3760 if (kind == TYPES_DOMAIN
3761 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3762 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3763 /* variable, func, or typedef-that-is-c++-class. */
3764 else if (kind < TYPES_DOMAIN
3765 || (kind == TYPES_DOMAIN
3766 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3768 type_print (SYMBOL_TYPE (sym),
3769 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3770 ? "" : SYMBOL_PRINT_NAME (sym)),
3773 printf_filtered (";\n");
3777 /* This help function for symtab_symbol_info() prints information
3778 for non-debugging symbols to gdb_stdout. */
3781 print_msymbol_info (struct minimal_symbol *msymbol)
3783 struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
3786 if (gdbarch_addr_bit (gdbarch) <= 32)
3787 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3788 & (CORE_ADDR) 0xffffffff,
3791 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3793 printf_filtered ("%s %s\n",
3794 tmp, SYMBOL_PRINT_NAME (msymbol));
3797 /* This is the guts of the commands "info functions", "info types", and
3798 "info variables". It calls search_symbols to find all matches and then
3799 print_[m]symbol_info to print out some useful information about the
3803 symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty)
3805 static const char * const classnames[] =
3806 {"variable", "function", "type"};
3807 struct symbol_search *symbols;
3808 struct symbol_search *p;
3809 struct cleanup *old_chain;
3810 char *last_filename = NULL;
3813 gdb_assert (kind <= TYPES_DOMAIN);
3815 /* Must make sure that if we're interrupted, symbols gets freed. */
3816 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3817 old_chain = make_cleanup_free_search_symbols (symbols);
3820 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
3821 classnames[kind], regexp);
3823 printf_filtered (_("All defined %ss:\n"), classnames[kind]);
3825 for (p = symbols; p != NULL; p = p->next)
3829 if (p->msymbol != NULL)
3833 printf_filtered (_("\nNon-debugging symbols:\n"));
3836 print_msymbol_info (p->msymbol);
3840 print_symbol_info (kind,
3845 last_filename = p->symtab->filename;
3849 do_cleanups (old_chain);
3853 variables_info (char *regexp, int from_tty)
3855 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3859 functions_info (char *regexp, int from_tty)
3861 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3866 types_info (char *regexp, int from_tty)
3868 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3871 /* Breakpoint all functions matching regular expression. */
3874 rbreak_command_wrapper (char *regexp, int from_tty)
3876 rbreak_command (regexp, from_tty);
3879 /* A cleanup function that calls end_rbreak_breakpoints. */
3882 do_end_rbreak_breakpoints (void *ignore)
3884 end_rbreak_breakpoints ();
3888 rbreak_command (char *regexp, int from_tty)
3890 struct symbol_search *ss;
3891 struct symbol_search *p;
3892 struct cleanup *old_chain;
3893 char *string = NULL;
3895 char **files = NULL, *file_name;
3900 char *colon = strchr (regexp, ':');
3902 if (colon && *(colon + 1) != ':')
3906 colon_index = colon - regexp;
3907 file_name = alloca (colon_index + 1);
3908 memcpy (file_name, regexp, colon_index);
3909 file_name[colon_index--] = 0;
3910 while (isspace (file_name[colon_index]))
3911 file_name[colon_index--] = 0;
3915 while (isspace (*regexp)) regexp++;
3919 search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss);
3920 old_chain = make_cleanup_free_search_symbols (ss);
3921 make_cleanup (free_current_contents, &string);
3923 start_rbreak_breakpoints ();
3924 make_cleanup (do_end_rbreak_breakpoints, NULL);
3925 for (p = ss; p != NULL; p = p->next)
3927 if (p->msymbol == NULL)
3929 int newlen = (strlen (p->symtab->filename)
3930 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3935 string = xrealloc (string, newlen);
3938 strcpy (string, p->symtab->filename);
3939 strcat (string, ":'");
3940 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3941 strcat (string, "'");
3942 break_command (string, from_tty);
3943 print_symbol_info (FUNCTIONS_DOMAIN,
3947 p->symtab->filename);
3951 int newlen = (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) + 3);
3955 string = xrealloc (string, newlen);
3958 strcpy (string, "'");
3959 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3960 strcat (string, "'");
3962 break_command (string, from_tty);
3963 printf_filtered ("<function, no debug info> %s;\n",
3964 SYMBOL_PRINT_NAME (p->msymbol));
3968 do_cleanups (old_chain);
3972 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3974 Either sym_text[sym_text_len] != '(' and then we search for any
3975 symbol starting with SYM_TEXT text.
3977 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3978 be terminated at that point. Partial symbol tables do not have parameters
3982 compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
3984 int (*ncmp) (const char *, const char *, size_t);
3986 ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp);
3988 if (ncmp (name, sym_text, sym_text_len) != 0)
3991 if (sym_text[sym_text_len] == '(')
3993 /* User searches for `name(someth...'. Require NAME to be terminated.
3994 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3995 present but accept even parameters presence. In this case this
3996 function is in fact strcmp_iw but whitespace skipping is not supported
3997 for tab completion. */
3999 if (name[sym_text_len] != '\0' && name[sym_text_len] != '(')
4006 /* Free any memory associated with a completion list. */
4009 free_completion_list (VEC (char_ptr) **list_ptr)
4014 for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i)
4016 VEC_free (char_ptr, *list_ptr);
4019 /* Callback for make_cleanup. */
4022 do_free_completion_list (void *list)
4024 free_completion_list (list);
4027 /* Helper routine for make_symbol_completion_list. */
4029 static VEC (char_ptr) *return_val;
4031 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4032 completion_list_add_name \
4033 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4035 /* Test to see if the symbol specified by SYMNAME (which is already
4036 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4037 characters. If so, add it to the current completion list. */
4040 completion_list_add_name (const char *symname,
4041 const char *sym_text, int sym_text_len,
4042 const char *text, const char *word)
4046 /* Clip symbols that cannot match. */
4047 if (!compare_symbol_name (symname, sym_text, sym_text_len))
4050 /* We have a match for a completion, so add SYMNAME to the current list
4051 of matches. Note that the name is moved to freshly malloc'd space. */
4056 if (word == sym_text)
4058 new = xmalloc (strlen (symname) + 5);
4059 strcpy (new, symname);
4061 else if (word > sym_text)
4063 /* Return some portion of symname. */
4064 new = xmalloc (strlen (symname) + 5);
4065 strcpy (new, symname + (word - sym_text));
4069 /* Return some of SYM_TEXT plus symname. */
4070 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
4071 strncpy (new, word, sym_text - word);
4072 new[sym_text - word] = '\0';
4073 strcat (new, symname);
4076 VEC_safe_push (char_ptr, return_val, new);
4080 /* ObjC: In case we are completing on a selector, look as the msymbol
4081 again and feed all the selectors into the mill. */
4084 completion_list_objc_symbol (struct minimal_symbol *msymbol,
4085 const char *sym_text, int sym_text_len,
4086 const char *text, const char *word)
4088 static char *tmp = NULL;
4089 static unsigned int tmplen = 0;
4091 const char *method, *category, *selector;
4094 method = SYMBOL_NATURAL_NAME (msymbol);
4096 /* Is it a method? */
4097 if ((method[0] != '-') && (method[0] != '+'))
4100 if (sym_text[0] == '[')
4101 /* Complete on shortened method method. */
4102 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
4104 while ((strlen (method) + 1) >= tmplen)
4110 tmp = xrealloc (tmp, tmplen);
4112 selector = strchr (method, ' ');
4113 if (selector != NULL)
4116 category = strchr (method, '(');
4118 if ((category != NULL) && (selector != NULL))
4120 memcpy (tmp, method, (category - method));
4121 tmp[category - method] = ' ';
4122 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
4123 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4124 if (sym_text[0] == '[')
4125 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
4128 if (selector != NULL)
4130 /* Complete on selector only. */
4131 strcpy (tmp, selector);
4132 tmp2 = strchr (tmp, ']');
4136 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4140 /* Break the non-quoted text based on the characters which are in
4141 symbols. FIXME: This should probably be language-specific. */
4144 language_search_unquoted_string (char *text, char *p)
4146 for (; p > text; --p)
4148 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
4152 if ((current_language->la_language == language_objc))
4154 if (p[-1] == ':') /* Might be part of a method name. */
4156 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
4157 p -= 2; /* Beginning of a method name. */
4158 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
4159 { /* Might be part of a method name. */
4162 /* Seeing a ' ' or a '(' is not conclusive evidence
4163 that we are in the middle of a method name. However,
4164 finding "-[" or "+[" should be pretty un-ambiguous.
4165 Unfortunately we have to find it now to decide. */
4168 if (isalnum (t[-1]) || t[-1] == '_' ||
4169 t[-1] == ' ' || t[-1] == ':' ||
4170 t[-1] == '(' || t[-1] == ')')
4175 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
4176 p = t - 2; /* Method name detected. */
4177 /* Else we leave with p unchanged. */
4187 completion_list_add_fields (struct symbol *sym, char *sym_text,
4188 int sym_text_len, char *text, char *word)
4190 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4192 struct type *t = SYMBOL_TYPE (sym);
4193 enum type_code c = TYPE_CODE (t);
4196 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
4197 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
4198 if (TYPE_FIELD_NAME (t, j))
4199 completion_list_add_name (TYPE_FIELD_NAME (t, j),
4200 sym_text, sym_text_len, text, word);
4204 /* Type of the user_data argument passed to add_macro_name or
4205 expand_partial_symbol_name. The contents are simply whatever is
4206 needed by completion_list_add_name. */
4207 struct add_name_data
4215 /* A callback used with macro_for_each and macro_for_each_in_scope.
4216 This adds a macro's name to the current completion list. */
4219 add_macro_name (const char *name, const struct macro_definition *ignore,
4220 struct macro_source_file *ignore2, int ignore3,
4223 struct add_name_data *datum = (struct add_name_data *) user_data;
4225 completion_list_add_name ((char *) name,
4226 datum->sym_text, datum->sym_text_len,
4227 datum->text, datum->word);
4230 /* A callback for expand_partial_symbol_names. */
4233 expand_partial_symbol_name (const char *name, void *user_data)
4235 struct add_name_data *datum = (struct add_name_data *) user_data;
4237 return compare_symbol_name (name, datum->sym_text, datum->sym_text_len);
4241 default_make_symbol_completion_list_break_on (char *text, char *word,
4242 const char *break_on,
4243 enum type_code code)
4245 /* Problem: All of the symbols have to be copied because readline
4246 frees them. I'm not going to worry about this; hopefully there
4247 won't be that many. */
4251 struct minimal_symbol *msymbol;
4252 struct objfile *objfile;
4254 const struct block *surrounding_static_block, *surrounding_global_block;
4255 struct block_iterator iter;
4256 /* The symbol we are completing on. Points in same buffer as text. */
4258 /* Length of sym_text. */
4260 struct add_name_data datum;
4261 struct cleanup *back_to;
4263 /* Now look for the symbol we are supposed to complete on. */
4267 char *quote_pos = NULL;
4269 /* First see if this is a quoted string. */
4271 for (p = text; *p != '\0'; ++p)
4273 if (quote_found != '\0')
4275 if (*p == quote_found)
4276 /* Found close quote. */
4278 else if (*p == '\\' && p[1] == quote_found)
4279 /* A backslash followed by the quote character
4280 doesn't end the string. */
4283 else if (*p == '\'' || *p == '"')
4289 if (quote_found == '\'')
4290 /* A string within single quotes can be a symbol, so complete on it. */
4291 sym_text = quote_pos + 1;
4292 else if (quote_found == '"')
4293 /* A double-quoted string is never a symbol, nor does it make sense
4294 to complete it any other way. */
4300 /* It is not a quoted string. Break it based on the characters
4301 which are in symbols. */
4304 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
4305 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
4314 sym_text_len = strlen (sym_text);
4316 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4318 if (current_language->la_language == language_cplus
4319 || current_language->la_language == language_java
4320 || current_language->la_language == language_fortran)
4322 /* These languages may have parameters entered by user but they are never
4323 present in the partial symbol tables. */
4325 const char *cs = memchr (sym_text, '(', sym_text_len);
4328 sym_text_len = cs - sym_text;
4330 gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
4333 back_to = make_cleanup (do_free_completion_list, &return_val);
4335 datum.sym_text = sym_text;
4336 datum.sym_text_len = sym_text_len;
4340 /* Look through the partial symtabs for all symbols which begin
4341 by matching SYM_TEXT. Expand all CUs that you find to the list.
4342 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4343 expand_partial_symbol_names (expand_partial_symbol_name, &datum);
4345 /* At this point scan through the misc symbol vectors and add each
4346 symbol you find to the list. Eventually we want to ignore
4347 anything that isn't a text symbol (everything else will be
4348 handled by the psymtab code above). */
4350 if (code == TYPE_CODE_UNDEF)
4352 ALL_MSYMBOLS (objfile, msymbol)
4355 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text,
4358 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text,
4363 /* Search upwards from currently selected frame (so that we can
4364 complete on local vars). Also catch fields of types defined in
4365 this places which match our text string. Only complete on types
4366 visible from current context. */
4368 b = get_selected_block (0);
4369 surrounding_static_block = block_static_block (b);
4370 surrounding_global_block = block_global_block (b);
4371 if (surrounding_static_block != NULL)
4372 while (b != surrounding_static_block)
4376 ALL_BLOCK_SYMBOLS (b, iter, sym)
4378 if (code == TYPE_CODE_UNDEF)
4380 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4382 completion_list_add_fields (sym, sym_text, sym_text_len, text,
4385 else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4386 && TYPE_CODE (SYMBOL_TYPE (sym)) == code)
4387 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4391 /* Stop when we encounter an enclosing function. Do not stop for
4392 non-inlined functions - the locals of the enclosing function
4393 are in scope for a nested function. */
4394 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
4396 b = BLOCK_SUPERBLOCK (b);
4399 /* Add fields from the file's types; symbols will be added below. */
4401 if (code == TYPE_CODE_UNDEF)
4403 if (surrounding_static_block != NULL)
4404 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
4405 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4407 if (surrounding_global_block != NULL)
4408 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
4409 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4412 /* Go through the symtabs and check the externs and statics for
4413 symbols which match. */
4415 ALL_PRIMARY_SYMTABS (objfile, s)
4418 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4419 ALL_BLOCK_SYMBOLS (b, iter, sym)
4421 if (code == TYPE_CODE_UNDEF
4422 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4423 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
4424 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4428 ALL_PRIMARY_SYMTABS (objfile, s)
4431 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4432 ALL_BLOCK_SYMBOLS (b, iter, sym)
4434 if (code == TYPE_CODE_UNDEF
4435 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4436 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
4437 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4441 /* Skip macros if we are completing a struct tag -- arguable but
4442 usually what is expected. */
4443 if (current_language->la_macro_expansion == macro_expansion_c
4444 && code == TYPE_CODE_UNDEF)
4446 struct macro_scope *scope;
4448 /* Add any macros visible in the default scope. Note that this
4449 may yield the occasional wrong result, because an expression
4450 might be evaluated in a scope other than the default. For
4451 example, if the user types "break file:line if <TAB>", the
4452 resulting expression will be evaluated at "file:line" -- but
4453 at there does not seem to be a way to detect this at
4455 scope = default_macro_scope ();
4458 macro_for_each_in_scope (scope->file, scope->line,
4459 add_macro_name, &datum);
4463 /* User-defined macros are always visible. */
4464 macro_for_each (macro_user_macros, add_macro_name, &datum);
4467 discard_cleanups (back_to);
4468 return (return_val);
4472 default_make_symbol_completion_list (char *text, char *word,
4473 enum type_code code)
4475 return default_make_symbol_completion_list_break_on (text, word, "", code);
4478 /* Return a vector of all symbols (regardless of class) which begin by
4479 matching TEXT. If the answer is no symbols, then the return value
4483 make_symbol_completion_list (char *text, char *word)
4485 return current_language->la_make_symbol_completion_list (text, word,
4489 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4490 symbols whose type code is CODE. */
4493 make_symbol_completion_type (char *text, char *word, enum type_code code)
4495 gdb_assert (code == TYPE_CODE_UNION
4496 || code == TYPE_CODE_STRUCT
4497 || code == TYPE_CODE_CLASS
4498 || code == TYPE_CODE_ENUM);
4499 return current_language->la_make_symbol_completion_list (text, word, code);
4502 /* Like make_symbol_completion_list, but suitable for use as a
4503 completion function. */
4506 make_symbol_completion_list_fn (struct cmd_list_element *ignore,
4507 char *text, char *word)
4509 return make_symbol_completion_list (text, word);
4512 /* Like make_symbol_completion_list, but returns a list of symbols
4513 defined in a source file FILE. */
4516 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
4521 struct block_iterator iter;
4522 /* The symbol we are completing on. Points in same buffer as text. */
4524 /* Length of sym_text. */
4527 /* Now look for the symbol we are supposed to complete on.
4528 FIXME: This should be language-specific. */
4532 char *quote_pos = NULL;
4534 /* First see if this is a quoted string. */
4536 for (p = text; *p != '\0'; ++p)
4538 if (quote_found != '\0')
4540 if (*p == quote_found)
4541 /* Found close quote. */
4543 else if (*p == '\\' && p[1] == quote_found)
4544 /* A backslash followed by the quote character
4545 doesn't end the string. */
4548 else if (*p == '\'' || *p == '"')
4554 if (quote_found == '\'')
4555 /* A string within single quotes can be a symbol, so complete on it. */
4556 sym_text = quote_pos + 1;
4557 else if (quote_found == '"')
4558 /* A double-quoted string is never a symbol, nor does it make sense
4559 to complete it any other way. */
4565 /* Not a quoted string. */
4566 sym_text = language_search_unquoted_string (text, p);
4570 sym_text_len = strlen (sym_text);
4574 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4576 s = lookup_symtab (srcfile);
4579 /* Maybe they typed the file with leading directories, while the
4580 symbol tables record only its basename. */
4581 const char *tail = lbasename (srcfile);
4584 s = lookup_symtab (tail);
4587 /* If we have no symtab for that file, return an empty list. */
4589 return (return_val);
4591 /* Go through this symtab and check the externs and statics for
4592 symbols which match. */
4594 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4595 ALL_BLOCK_SYMBOLS (b, iter, sym)
4597 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4600 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4601 ALL_BLOCK_SYMBOLS (b, iter, sym)
4603 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4606 return (return_val);
4609 /* A helper function for make_source_files_completion_list. It adds
4610 another file name to a list of possible completions, growing the
4611 list as necessary. */
4614 add_filename_to_list (const char *fname, char *text, char *word,
4615 VEC (char_ptr) **list)
4618 size_t fnlen = strlen (fname);
4622 /* Return exactly fname. */
4623 new = xmalloc (fnlen + 5);
4624 strcpy (new, fname);
4626 else if (word > text)
4628 /* Return some portion of fname. */
4629 new = xmalloc (fnlen + 5);
4630 strcpy (new, fname + (word - text));
4634 /* Return some of TEXT plus fname. */
4635 new = xmalloc (fnlen + (text - word) + 5);
4636 strncpy (new, word, text - word);
4637 new[text - word] = '\0';
4638 strcat (new, fname);
4640 VEC_safe_push (char_ptr, *list, new);
4644 not_interesting_fname (const char *fname)
4646 static const char *illegal_aliens[] = {
4647 "_globals_", /* inserted by coff_symtab_read */
4652 for (i = 0; illegal_aliens[i]; i++)
4654 if (filename_cmp (fname, illegal_aliens[i]) == 0)
4660 /* An object of this type is passed as the user_data argument to
4661 map_partial_symbol_filenames. */
4662 struct add_partial_filename_data
4664 struct filename_seen_cache *filename_seen_cache;
4668 VEC (char_ptr) **list;
4671 /* A callback for map_partial_symbol_filenames. */
4674 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
4677 struct add_partial_filename_data *data = user_data;
4679 if (not_interesting_fname (filename))
4681 if (!filename_seen (data->filename_seen_cache, filename, 1)
4682 && filename_ncmp (filename, data->text, data->text_len) == 0)
4684 /* This file matches for a completion; add it to the
4685 current list of matches. */
4686 add_filename_to_list (filename, data->text, data->word, data->list);
4690 const char *base_name = lbasename (filename);
4692 if (base_name != filename
4693 && !filename_seen (data->filename_seen_cache, base_name, 1)
4694 && filename_ncmp (base_name, data->text, data->text_len) == 0)
4695 add_filename_to_list (base_name, data->text, data->word, data->list);
4699 /* Return a vector of all source files whose names begin with matching
4700 TEXT. The file names are looked up in the symbol tables of this
4701 program. If the answer is no matchess, then the return value is
4705 make_source_files_completion_list (char *text, char *word)
4708 struct objfile *objfile;
4709 size_t text_len = strlen (text);
4710 VEC (char_ptr) *list = NULL;
4711 const char *base_name;
4712 struct add_partial_filename_data datum;
4713 struct filename_seen_cache *filename_seen_cache;
4714 struct cleanup *back_to, *cache_cleanup;
4716 if (!have_full_symbols () && !have_partial_symbols ())
4719 back_to = make_cleanup (do_free_completion_list, &list);
4721 filename_seen_cache = create_filename_seen_cache ();
4722 cache_cleanup = make_cleanup (delete_filename_seen_cache,
4723 filename_seen_cache);
4725 ALL_SYMTABS (objfile, s)
4727 if (not_interesting_fname (s->filename))
4729 if (!filename_seen (filename_seen_cache, s->filename, 1)
4730 && filename_ncmp (s->filename, text, text_len) == 0)
4732 /* This file matches for a completion; add it to the current
4734 add_filename_to_list (s->filename, text, word, &list);
4738 /* NOTE: We allow the user to type a base name when the
4739 debug info records leading directories, but not the other
4740 way around. This is what subroutines of breakpoint
4741 command do when they parse file names. */
4742 base_name = lbasename (s->filename);
4743 if (base_name != s->filename
4744 && !filename_seen (filename_seen_cache, base_name, 1)
4745 && filename_ncmp (base_name, text, text_len) == 0)
4746 add_filename_to_list (base_name, text, word, &list);
4750 datum.filename_seen_cache = filename_seen_cache;
4753 datum.text_len = text_len;
4755 map_partial_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
4756 0 /*need_fullname*/);
4758 do_cleanups (cache_cleanup);
4759 discard_cleanups (back_to);
4764 /* Determine if PC is in the prologue of a function. The prologue is the area
4765 between the first instruction of a function, and the first executable line.
4766 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4768 If non-zero, func_start is where we think the prologue starts, possibly
4769 by previous examination of symbol table information. */
4772 in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
4774 struct symtab_and_line sal;
4775 CORE_ADDR func_addr, func_end;
4777 /* We have several sources of information we can consult to figure
4779 - Compilers usually emit line number info that marks the prologue
4780 as its own "source line". So the ending address of that "line"
4781 is the end of the prologue. If available, this is the most
4783 - The minimal symbols and partial symbols, which can usually tell
4784 us the starting and ending addresses of a function.
4785 - If we know the function's start address, we can call the
4786 architecture-defined gdbarch_skip_prologue function to analyze the
4787 instruction stream and guess where the prologue ends.
4788 - Our `func_start' argument; if non-zero, this is the caller's
4789 best guess as to the function's entry point. At the time of
4790 this writing, handle_inferior_event doesn't get this right, so
4791 it should be our last resort. */
4793 /* Consult the partial symbol table, to find which function
4795 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4797 CORE_ADDR prologue_end;
4799 /* We don't even have minsym information, so fall back to using
4800 func_start, if given. */
4802 return 1; /* We *might* be in a prologue. */
4804 prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
4806 return func_start <= pc && pc < prologue_end;
4809 /* If we have line number information for the function, that's
4810 usually pretty reliable. */
4811 sal = find_pc_line (func_addr, 0);
4813 /* Now sal describes the source line at the function's entry point,
4814 which (by convention) is the prologue. The end of that "line",
4815 sal.end, is the end of the prologue.
4817 Note that, for functions whose source code is all on a single
4818 line, the line number information doesn't always end up this way.
4819 So we must verify that our purported end-of-prologue address is
4820 *within* the function, not at its start or end. */
4822 || sal.end <= func_addr
4823 || func_end <= sal.end)
4825 /* We don't have any good line number info, so use the minsym
4826 information, together with the architecture-specific prologue
4828 CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
4830 return func_addr <= pc && pc < prologue_end;
4833 /* We have line number info, and it looks good. */
4834 return func_addr <= pc && pc < sal.end;
4837 /* Given PC at the function's start address, attempt to find the
4838 prologue end using SAL information. Return zero if the skip fails.
4840 A non-optimized prologue traditionally has one SAL for the function
4841 and a second for the function body. A single line function has
4842 them both pointing at the same line.
4844 An optimized prologue is similar but the prologue may contain
4845 instructions (SALs) from the instruction body. Need to skip those
4846 while not getting into the function body.
4848 The functions end point and an increasing SAL line are used as
4849 indicators of the prologue's endpoint.
4851 This code is based on the function refine_prologue_limit
4855 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
4857 struct symtab_and_line prologue_sal;
4862 /* Get an initial range for the function. */
4863 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4864 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
4866 prologue_sal = find_pc_line (start_pc, 0);
4867 if (prologue_sal.line != 0)
4869 /* For languages other than assembly, treat two consecutive line
4870 entries at the same address as a zero-instruction prologue.
4871 The GNU assembler emits separate line notes for each instruction
4872 in a multi-instruction macro, but compilers generally will not
4874 if (prologue_sal.symtab->language != language_asm)
4876 struct linetable *linetable = LINETABLE (prologue_sal.symtab);
4879 /* Skip any earlier lines, and any end-of-sequence marker
4880 from a previous function. */
4881 while (linetable->item[idx].pc != prologue_sal.pc
4882 || linetable->item[idx].line == 0)
4885 if (idx+1 < linetable->nitems
4886 && linetable->item[idx+1].line != 0
4887 && linetable->item[idx+1].pc == start_pc)
4891 /* If there is only one sal that covers the entire function,
4892 then it is probably a single line function, like
4894 if (prologue_sal.end >= end_pc)
4897 while (prologue_sal.end < end_pc)
4899 struct symtab_and_line sal;
4901 sal = find_pc_line (prologue_sal.end, 0);
4904 /* Assume that a consecutive SAL for the same (or larger)
4905 line mark the prologue -> body transition. */
4906 if (sal.line >= prologue_sal.line)
4908 /* Likewise if we are in a different symtab altogether
4909 (e.g. within a file included via #include). */
4910 if (sal.symtab != prologue_sal.symtab)
4913 /* The line number is smaller. Check that it's from the
4914 same function, not something inlined. If it's inlined,
4915 then there is no point comparing the line numbers. */
4916 bl = block_for_pc (prologue_sal.end);
4919 if (block_inlined_p (bl))
4921 if (BLOCK_FUNCTION (bl))
4926 bl = BLOCK_SUPERBLOCK (bl);
4931 /* The case in which compiler's optimizer/scheduler has
4932 moved instructions into the prologue. We look ahead in
4933 the function looking for address ranges whose
4934 corresponding line number is less the first one that we
4935 found for the function. This is more conservative then
4936 refine_prologue_limit which scans a large number of SALs
4937 looking for any in the prologue. */
4942 if (prologue_sal.end < end_pc)
4943 /* Return the end of this line, or zero if we could not find a
4945 return prologue_sal.end;
4947 /* Don't return END_PC, which is past the end of the function. */
4948 return prologue_sal.pc;
4952 static char *name_of_main;
4953 enum language language_of_main = language_unknown;
4956 set_main_name (const char *name)
4958 if (name_of_main != NULL)
4960 xfree (name_of_main);
4961 name_of_main = NULL;
4962 language_of_main = language_unknown;
4966 name_of_main = xstrdup (name);
4967 language_of_main = language_unknown;
4971 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4975 find_main_name (void)
4977 const char *new_main_name;
4979 /* Try to see if the main procedure is in Ada. */
4980 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4981 be to add a new method in the language vector, and call this
4982 method for each language until one of them returns a non-empty
4983 name. This would allow us to remove this hard-coded call to
4984 an Ada function. It is not clear that this is a better approach
4985 at this point, because all methods need to be written in a way
4986 such that false positives never be returned. For instance, it is
4987 important that a method does not return a wrong name for the main
4988 procedure if the main procedure is actually written in a different
4989 language. It is easy to guaranty this with Ada, since we use a
4990 special symbol generated only when the main in Ada to find the name
4991 of the main procedure. It is difficult however to see how this can
4992 be guarantied for languages such as C, for instance. This suggests
4993 that order of call for these methods becomes important, which means
4994 a more complicated approach. */
4995 new_main_name = ada_main_name ();
4996 if (new_main_name != NULL)
4998 set_main_name (new_main_name);
5002 new_main_name = go_main_name ();
5003 if (new_main_name != NULL)
5005 set_main_name (new_main_name);
5009 new_main_name = pascal_main_name ();
5010 if (new_main_name != NULL)
5012 set_main_name (new_main_name);
5016 /* The languages above didn't identify the name of the main procedure.
5017 Fallback to "main". */
5018 set_main_name ("main");
5024 if (name_of_main == NULL)
5027 return name_of_main;
5030 /* Handle ``executable_changed'' events for the symtab module. */
5033 symtab_observer_executable_changed (void)
5035 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5036 set_main_name (NULL);
5039 /* Return 1 if the supplied producer string matches the ARM RealView
5040 compiler (armcc). */
5043 producer_is_realview (const char *producer)
5045 static const char *const arm_idents[] = {
5046 "ARM C Compiler, ADS",
5047 "Thumb C Compiler, ADS",
5048 "ARM C++ Compiler, ADS",
5049 "Thumb C++ Compiler, ADS",
5050 "ARM/Thumb C/C++ Compiler, RVCT",
5051 "ARM C/C++ Compiler, RVCT"
5055 if (producer == NULL)
5058 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
5059 if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0)
5066 _initialize_symtab (void)
5068 add_info ("variables", variables_info, _("\
5069 All global and static variable names, or those matching REGEXP."));
5071 add_com ("whereis", class_info, variables_info, _("\
5072 All global and static variable names, or those matching REGEXP."));
5074 add_info ("functions", functions_info,
5075 _("All function names, or those matching REGEXP."));
5077 /* FIXME: This command has at least the following problems:
5078 1. It prints builtin types (in a very strange and confusing fashion).
5079 2. It doesn't print right, e.g. with
5080 typedef struct foo *FOO
5081 type_print prints "FOO" when we want to make it (in this situation)
5082 print "struct foo *".
5083 I also think "ptype" or "whatis" is more likely to be useful (but if
5084 there is much disagreement "info types" can be fixed). */
5085 add_info ("types", types_info,
5086 _("All type names, or those matching REGEXP."));
5088 add_info ("sources", sources_info,
5089 _("Source files in the program."));
5091 add_com ("rbreak", class_breakpoint, rbreak_command,
5092 _("Set a breakpoint for all functions matching REGEXP."));
5096 add_com ("lf", class_info, sources_info,
5097 _("Source files in the program"));
5098 add_com ("lg", class_info, variables_info, _("\
5099 All global and static variable names, or those matching REGEXP."));
5102 add_setshow_enum_cmd ("multiple-symbols", no_class,
5103 multiple_symbols_modes, &multiple_symbols_mode,
5105 Set the debugger behavior when more than one symbol are possible matches\n\
5106 in an expression."), _("\
5107 Show how the debugger handles ambiguities in expressions."), _("\
5108 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5109 NULL, NULL, &setlist, &showlist);
5111 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
5112 &basenames_may_differ, _("\
5113 Set whether a source file may have multiple base names."), _("\
5114 Show whether a source file may have multiple base names."), _("\
5115 (A \"base name\" is the name of a file with the directory part removed.\n\
5116 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5117 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5118 before comparing them. Canonicalization is an expensive operation,\n\
5119 but it allows the same file be known by more than one base name.\n\
5120 If not set (the default), all source files are assumed to have just\n\
5121 one base name, and gdb will do file name comparisons more efficiently."),
5123 &setlist, &showlist);
5125 add_setshow_boolean_cmd ("symtab-create", no_class, &symtab_create_debug,
5126 _("Set debugging of symbol table creation."),
5127 _("Show debugging of symbol table creation."), _("\
5128 When enabled, debugging messages are printed when building symbol tables."),
5131 &setdebuglist, &showdebuglist);
5133 observer_attach_executable_changed (symtab_observer_executable_changed);