1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2004, 2007-2012 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 "call-cmds.h"
31 #include "gdb_regex.h"
32 #include "expression.h"
38 #include "filenames.h" /* for FILENAME_CMP */
39 #include "objc-lang.h"
48 #include "gdb_obstack.h"
50 #include "dictionary.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
58 #include "cp-support.h"
60 #include "gdb_assert.h"
63 #include "macroscope.h"
67 /* Prototypes for local functions */
69 static void rbreak_command (char *, int);
71 static void types_info (char *, int);
73 static void functions_info (char *, int);
75 static void variables_info (char *, int);
77 static void sources_info (char *, int);
79 static void output_source_filename (const char *, int *);
81 static int find_line_common (struct linetable *, int, int *, int);
83 static struct symbol *lookup_symbol_aux (const char *name,
84 const struct block *block,
85 const domain_enum domain,
86 enum language language,
87 int *is_a_field_of_this);
90 struct symbol *lookup_symbol_aux_local (const char *name,
91 const struct block *block,
92 const domain_enum domain,
93 enum language language);
96 struct symbol *lookup_symbol_aux_symtabs (int block_index,
98 const domain_enum domain);
101 struct symbol *lookup_symbol_aux_quick (struct objfile *objfile,
104 const domain_enum domain);
106 static void print_msymbol_info (struct minimal_symbol *);
108 void _initialize_symtab (void);
112 /* When non-zero, print debugging messages related to symtab creation. */
113 int symtab_create_debug = 0;
115 /* Non-zero if a file may be known by two different basenames.
116 This is the uncommon case, and significantly slows down gdb.
117 Default set to "off" to not slow down the common case. */
118 int basenames_may_differ = 0;
120 /* Allow the user to configure the debugger behavior with respect
121 to multiple-choice menus when more than one symbol matches during
124 const char multiple_symbols_ask[] = "ask";
125 const char multiple_symbols_all[] = "all";
126 const char multiple_symbols_cancel[] = "cancel";
127 static const char *const multiple_symbols_modes[] =
129 multiple_symbols_ask,
130 multiple_symbols_all,
131 multiple_symbols_cancel,
134 static const char *multiple_symbols_mode = multiple_symbols_all;
136 /* Read-only accessor to AUTO_SELECT_MODE. */
139 multiple_symbols_select_mode (void)
141 return multiple_symbols_mode;
144 /* Block in which the most recently searched-for symbol was found.
145 Might be better to make this a parameter to lookup_symbol and
148 const struct block *block_found;
150 /* See whether FILENAME matches SEARCH_NAME using the rule that we
151 advertise to the user. (The manual's description of linespecs
152 describes what we advertise). SEARCH_LEN is the length of
153 SEARCH_NAME. We assume that SEARCH_NAME is a relative path.
154 Returns true if they match, false otherwise. */
157 compare_filenames_for_search (const char *filename, const char *search_name,
160 int len = strlen (filename);
162 if (len < search_len)
165 /* The tail of FILENAME must match. */
166 if (FILENAME_CMP (filename + len - search_len, search_name) != 0)
169 /* Either the names must completely match, or the character
170 preceding the trailing SEARCH_NAME segment of FILENAME must be a
171 directory separator. */
172 return (len == search_len
173 || IS_DIR_SEPARATOR (filename[len - search_len - 1])
174 || (HAS_DRIVE_SPEC (filename)
175 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
178 /* Check for a symtab of a specific name by searching some symtabs.
179 This is a helper function for callbacks of iterate_over_symtabs.
181 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
182 are identical to the `map_symtabs_matching_filename' method of
183 quick_symbol_functions.
185 FIRST and AFTER_LAST indicate the range of symtabs to search.
186 AFTER_LAST is one past the last symtab to search; NULL means to
187 search until the end of the list. */
190 iterate_over_some_symtabs (const char *name,
191 const char *full_path,
192 const char *real_path,
193 int (*callback) (struct symtab *symtab,
196 struct symtab *first,
197 struct symtab *after_last)
199 struct symtab *s = NULL;
200 const char* base_name = lbasename (name);
201 int name_len = strlen (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, name_len))
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 (fp != NULL && FILENAME_CMP (full_path, fp) == 0)
234 if (callback (s, data))
238 if (fp != NULL && !is_abs && compare_filenames_for_search (fp, name,
241 if (callback (s, data))
246 if (real_path != NULL)
248 char *fullname = symtab_to_fullname (s);
250 if (fullname != NULL)
252 char *rp = gdb_realpath (fullname);
254 make_cleanup (xfree, rp);
255 if (FILENAME_CMP (real_path, rp) == 0)
257 if (callback (s, data))
261 if (!is_abs && compare_filenames_for_search (rp, name, name_len))
263 if (callback (s, data))
273 /* Check for a symtab of a specific name; first in symtabs, then in
274 psymtabs. *If* there is no '/' in the name, a match after a '/'
275 in the symtab filename will also work.
277 Calls CALLBACK with each symtab that is found and with the supplied
278 DATA. If CALLBACK returns true, the search stops. */
281 iterate_over_symtabs (const char *name,
282 int (*callback) (struct symtab *symtab,
286 struct symtab *s = NULL;
287 struct objfile *objfile;
288 char *real_path = NULL;
289 char *full_path = NULL;
290 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
292 /* Here we are interested in canonicalizing an absolute path, not
293 absolutizing a relative path. */
294 if (IS_ABSOLUTE_PATH (name))
296 full_path = xfullpath (name);
297 make_cleanup (xfree, full_path);
298 real_path = gdb_realpath (name);
299 make_cleanup (xfree, real_path);
302 ALL_OBJFILES (objfile)
304 if (iterate_over_some_symtabs (name, full_path, real_path, callback, data,
305 objfile->symtabs, NULL))
307 do_cleanups (cleanups);
312 /* Same search rules as above apply here, but now we look thru the
315 ALL_OBJFILES (objfile)
318 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
325 do_cleanups (cleanups);
330 do_cleanups (cleanups);
333 /* The callback function used by lookup_symtab. */
336 lookup_symtab_callback (struct symtab *symtab, void *data)
338 struct symtab **result_ptr = data;
340 *result_ptr = symtab;
344 /* A wrapper for iterate_over_symtabs that returns the first matching
348 lookup_symtab (const char *name)
350 struct symtab *result = NULL;
352 iterate_over_symtabs (name, lookup_symtab_callback, &result);
357 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
358 full method name, which consist of the class name (from T), the unadorned
359 method name from METHOD_ID, and the signature for the specific overload,
360 specified by SIGNATURE_ID. Note that this function is g++ specific. */
363 gdb_mangle_name (struct type *type, int method_id, int signature_id)
365 int mangled_name_len;
367 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
368 struct fn_field *method = &f[signature_id];
369 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
370 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
371 const char *newname = type_name_no_tag (type);
373 /* Does the form of physname indicate that it is the full mangled name
374 of a constructor (not just the args)? */
375 int is_full_physname_constructor;
378 int is_destructor = is_destructor_name (physname);
379 /* Need a new type prefix. */
380 char *const_prefix = method->is_const ? "C" : "";
381 char *volatile_prefix = method->is_volatile ? "V" : "";
383 int len = (newname == NULL ? 0 : strlen (newname));
385 /* Nothing to do if physname already contains a fully mangled v3 abi name
386 or an operator name. */
387 if ((physname[0] == '_' && physname[1] == 'Z')
388 || is_operator_name (field_name))
389 return xstrdup (physname);
391 is_full_physname_constructor = is_constructor_name (physname);
393 is_constructor = is_full_physname_constructor
394 || (newname && strcmp (field_name, newname) == 0);
397 is_destructor = (strncmp (physname, "__dt", 4) == 0);
399 if (is_destructor || is_full_physname_constructor)
401 mangled_name = (char *) xmalloc (strlen (physname) + 1);
402 strcpy (mangled_name, physname);
408 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
410 else if (physname[0] == 't' || physname[0] == 'Q')
412 /* The physname for template and qualified methods already includes
414 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
420 sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
422 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
423 + strlen (buf) + len + strlen (physname) + 1);
425 mangled_name = (char *) xmalloc (mangled_name_len);
427 mangled_name[0] = '\0';
429 strcpy (mangled_name, field_name);
431 strcat (mangled_name, buf);
432 /* If the class doesn't have a name, i.e. newname NULL, then we just
433 mangle it using 0 for the length of the class. Thus it gets mangled
434 as something starting with `::' rather than `classname::'. */
436 strcat (mangled_name, newname);
438 strcat (mangled_name, physname);
439 return (mangled_name);
442 /* Initialize the cplus_specific structure. 'cplus_specific' should
443 only be allocated for use with cplus symbols. */
446 symbol_init_cplus_specific (struct general_symbol_info *gsymbol,
447 struct objfile *objfile)
449 /* A language_specific structure should not have been previously
451 gdb_assert (gsymbol->language_specific.cplus_specific == NULL);
452 gdb_assert (objfile != NULL);
454 gsymbol->language_specific.cplus_specific =
455 OBSTACK_ZALLOC (&objfile->objfile_obstack, struct cplus_specific);
458 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
459 correctly allocated. For C++ symbols a cplus_specific struct is
460 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
461 OBJFILE can be NULL. */
464 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
466 struct objfile *objfile)
468 if (gsymbol->language == language_cplus)
470 if (gsymbol->language_specific.cplus_specific == NULL)
471 symbol_init_cplus_specific (gsymbol, objfile);
473 gsymbol->language_specific.cplus_specific->demangled_name = name;
476 gsymbol->language_specific.mangled_lang.demangled_name = name;
479 /* Return the demangled name of GSYMBOL. */
482 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
484 if (gsymbol->language == language_cplus)
486 if (gsymbol->language_specific.cplus_specific != NULL)
487 return gsymbol->language_specific.cplus_specific->demangled_name;
492 return gsymbol->language_specific.mangled_lang.demangled_name;
496 /* Initialize the language dependent portion of a symbol
497 depending upon the language for the symbol. */
500 symbol_set_language (struct general_symbol_info *gsymbol,
501 enum language language)
503 gsymbol->language = language;
504 if (gsymbol->language == language_d
505 || gsymbol->language == language_go
506 || gsymbol->language == language_java
507 || gsymbol->language == language_objc
508 || gsymbol->language == language_fortran)
510 symbol_set_demangled_name (gsymbol, NULL, NULL);
512 else if (gsymbol->language == language_cplus)
513 gsymbol->language_specific.cplus_specific = NULL;
516 memset (&gsymbol->language_specific, 0,
517 sizeof (gsymbol->language_specific));
521 /* Functions to initialize a symbol's mangled name. */
523 /* Objects of this type are stored in the demangled name hash table. */
524 struct demangled_name_entry
530 /* Hash function for the demangled name hash. */
533 hash_demangled_name_entry (const void *data)
535 const struct demangled_name_entry *e = data;
537 return htab_hash_string (e->mangled);
540 /* Equality function for the demangled name hash. */
543 eq_demangled_name_entry (const void *a, const void *b)
545 const struct demangled_name_entry *da = a;
546 const struct demangled_name_entry *db = b;
548 return strcmp (da->mangled, db->mangled) == 0;
551 /* Create the hash table used for demangled names. Each hash entry is
552 a pair of strings; one for the mangled name and one for the demangled
553 name. The entry is hashed via just the mangled name. */
556 create_demangled_names_hash (struct objfile *objfile)
558 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
559 The hash table code will round this up to the next prime number.
560 Choosing a much larger table size wastes memory, and saves only about
561 1% in symbol reading. */
563 objfile->demangled_names_hash = htab_create_alloc
564 (256, hash_demangled_name_entry, eq_demangled_name_entry,
565 NULL, xcalloc, xfree);
568 /* Try to determine the demangled name for a symbol, based on the
569 language of that symbol. If the language is set to language_auto,
570 it will attempt to find any demangling algorithm that works and
571 then set the language appropriately. The returned name is allocated
572 by the demangler and should be xfree'd. */
575 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
578 char *demangled = NULL;
580 if (gsymbol->language == language_unknown)
581 gsymbol->language = language_auto;
583 if (gsymbol->language == language_objc
584 || gsymbol->language == language_auto)
587 objc_demangle (mangled, 0);
588 if (demangled != NULL)
590 gsymbol->language = language_objc;
594 if (gsymbol->language == language_cplus
595 || gsymbol->language == language_auto)
598 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
599 if (demangled != NULL)
601 gsymbol->language = language_cplus;
605 if (gsymbol->language == language_java)
608 cplus_demangle (mangled,
609 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
610 if (demangled != NULL)
612 gsymbol->language = language_java;
616 if (gsymbol->language == language_d
617 || gsymbol->language == language_auto)
619 demangled = d_demangle(mangled, 0);
620 if (demangled != NULL)
622 gsymbol->language = language_d;
626 /* FIXME(dje): Continually adding languages here is clumsy.
627 Better to just call la_demangle if !auto, and if auto then call
628 a utility routine that tries successive languages in turn and reports
629 which one it finds. I realize the la_demangle options may be different
630 for different languages but there's already a FIXME for that. */
631 if (gsymbol->language == language_go
632 || gsymbol->language == language_auto)
634 demangled = go_demangle (mangled, 0);
635 if (demangled != NULL)
637 gsymbol->language = language_go;
642 /* We could support `gsymbol->language == language_fortran' here to provide
643 module namespaces also for inferiors with only minimal symbol table (ELF
644 symbols). Just the mangling standard is not standardized across compilers
645 and there is no DW_AT_producer available for inferiors with only the ELF
646 symbols to check the mangling kind. */
650 /* Set both the mangled and demangled (if any) names for GSYMBOL based
651 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
652 objfile's obstack; but if COPY_NAME is 0 and if NAME is
653 NUL-terminated, then this function assumes that NAME is already
654 correctly saved (either permanently or with a lifetime tied to the
655 objfile), and it will not be copied.
657 The hash table corresponding to OBJFILE is used, and the memory
658 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
659 so the pointer can be discarded after calling this function. */
661 /* We have to be careful when dealing with Java names: when we run
662 into a Java minimal symbol, we don't know it's a Java symbol, so it
663 gets demangled as a C++ name. This is unfortunate, but there's not
664 much we can do about it: but when demangling partial symbols and
665 regular symbols, we'd better not reuse the wrong demangled name.
666 (See PR gdb/1039.) We solve this by putting a distinctive prefix
667 on Java names when storing them in the hash table. */
669 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
670 don't mind the Java prefix so much: different languages have
671 different demangling requirements, so it's only natural that we
672 need to keep language data around in our demangling cache. But
673 it's not good that the minimal symbol has the wrong demangled name.
674 Unfortunately, I can't think of any easy solution to that
677 #define JAVA_PREFIX "##JAVA$$"
678 #define JAVA_PREFIX_LEN 8
681 symbol_set_names (struct general_symbol_info *gsymbol,
682 const char *linkage_name, int len, int copy_name,
683 struct objfile *objfile)
685 struct demangled_name_entry **slot;
686 /* A 0-terminated copy of the linkage name. */
687 const char *linkage_name_copy;
688 /* A copy of the linkage name that might have a special Java prefix
689 added to it, for use when looking names up in the hash table. */
690 const char *lookup_name;
691 /* The length of lookup_name. */
693 struct demangled_name_entry entry;
695 if (gsymbol->language == language_ada)
697 /* In Ada, we do the symbol lookups using the mangled name, so
698 we can save some space by not storing the demangled name.
700 As a side note, we have also observed some overlap between
701 the C++ mangling and Ada mangling, similarly to what has
702 been observed with Java. Because we don't store the demangled
703 name with the symbol, we don't need to use the same trick
706 gsymbol->name = linkage_name;
709 char *name = obstack_alloc (&objfile->objfile_obstack, len + 1);
711 memcpy (name, linkage_name, len);
713 gsymbol->name = name;
715 symbol_set_demangled_name (gsymbol, NULL, NULL);
720 if (objfile->demangled_names_hash == NULL)
721 create_demangled_names_hash (objfile);
723 /* The stabs reader generally provides names that are not
724 NUL-terminated; most of the other readers don't do this, so we
725 can just use the given copy, unless we're in the Java case. */
726 if (gsymbol->language == language_java)
730 lookup_len = len + JAVA_PREFIX_LEN;
731 alloc_name = alloca (lookup_len + 1);
732 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
733 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
734 alloc_name[lookup_len] = '\0';
736 lookup_name = alloc_name;
737 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
739 else if (linkage_name[len] != '\0')
744 alloc_name = alloca (lookup_len + 1);
745 memcpy (alloc_name, linkage_name, len);
746 alloc_name[lookup_len] = '\0';
748 lookup_name = alloc_name;
749 linkage_name_copy = alloc_name;
754 lookup_name = linkage_name;
755 linkage_name_copy = linkage_name;
758 entry.mangled = (char *) lookup_name;
759 slot = ((struct demangled_name_entry **)
760 htab_find_slot (objfile->demangled_names_hash,
763 /* If this name is not in the hash table, add it. */
765 /* A C version of the symbol may have already snuck into the table.
766 This happens to, e.g., main.init (__go_init_main). Cope. */
767 || (gsymbol->language == language_go
768 && (*slot)->demangled[0] == '\0'))
770 char *demangled_name = symbol_find_demangled_name (gsymbol,
772 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
774 /* Suppose we have demangled_name==NULL, copy_name==0, and
775 lookup_name==linkage_name. In this case, we already have the
776 mangled name saved, and we don't have a demangled name. So,
777 you might think we could save a little space by not recording
778 this in the hash table at all.
780 It turns out that it is actually important to still save such
781 an entry in the hash table, because storing this name gives
782 us better bcache hit rates for partial symbols. */
783 if (!copy_name && lookup_name == linkage_name)
785 *slot = obstack_alloc (&objfile->objfile_obstack,
786 offsetof (struct demangled_name_entry,
788 + demangled_len + 1);
789 (*slot)->mangled = (char *) lookup_name;
793 /* If we must copy the mangled name, put it directly after
794 the demangled name so we can have a single
796 *slot = obstack_alloc (&objfile->objfile_obstack,
797 offsetof (struct demangled_name_entry,
799 + lookup_len + demangled_len + 2);
800 (*slot)->mangled = &((*slot)->demangled[demangled_len + 1]);
801 strcpy ((*slot)->mangled, lookup_name);
804 if (demangled_name != NULL)
806 strcpy ((*slot)->demangled, demangled_name);
807 xfree (demangled_name);
810 (*slot)->demangled[0] = '\0';
813 gsymbol->name = (*slot)->mangled + lookup_len - len;
814 if ((*slot)->demangled[0] != '\0')
815 symbol_set_demangled_name (gsymbol, (*slot)->demangled, objfile);
817 symbol_set_demangled_name (gsymbol, NULL, objfile);
820 /* Return the source code name of a symbol. In languages where
821 demangling is necessary, this is the demangled name. */
824 symbol_natural_name (const struct general_symbol_info *gsymbol)
826 switch (gsymbol->language)
833 case language_fortran:
834 if (symbol_get_demangled_name (gsymbol) != NULL)
835 return symbol_get_demangled_name (gsymbol);
838 if (symbol_get_demangled_name (gsymbol) != NULL)
839 return symbol_get_demangled_name (gsymbol);
841 return ada_decode_symbol (gsymbol);
846 return gsymbol->name;
849 /* Return the demangled name for a symbol based on the language for
850 that symbol. If no demangled name exists, return NULL. */
853 symbol_demangled_name (const struct general_symbol_info *gsymbol)
855 const char *dem_name = NULL;
857 switch (gsymbol->language)
864 case language_fortran:
865 dem_name = symbol_get_demangled_name (gsymbol);
868 dem_name = symbol_get_demangled_name (gsymbol);
869 if (dem_name == NULL)
870 dem_name = ada_decode_symbol (gsymbol);
878 /* Return the search name of a symbol---generally the demangled or
879 linkage name of the symbol, depending on how it will be searched for.
880 If there is no distinct demangled name, then returns the same value
881 (same pointer) as SYMBOL_LINKAGE_NAME. */
884 symbol_search_name (const struct general_symbol_info *gsymbol)
886 if (gsymbol->language == language_ada)
887 return gsymbol->name;
889 return symbol_natural_name (gsymbol);
892 /* Initialize the structure fields to zero values. */
895 init_sal (struct symtab_and_line *sal)
903 sal->explicit_pc = 0;
904 sal->explicit_line = 0;
909 /* Return 1 if the two sections are the same, or if they could
910 plausibly be copies of each other, one in an original object
911 file and another in a separated debug file. */
914 matching_obj_sections (struct obj_section *obj_first,
915 struct obj_section *obj_second)
917 asection *first = obj_first? obj_first->the_bfd_section : NULL;
918 asection *second = obj_second? obj_second->the_bfd_section : NULL;
921 /* If they're the same section, then they match. */
925 /* If either is NULL, give up. */
926 if (first == NULL || second == NULL)
929 /* This doesn't apply to absolute symbols. */
930 if (first->owner == NULL || second->owner == NULL)
933 /* If they're in the same object file, they must be different sections. */
934 if (first->owner == second->owner)
937 /* Check whether the two sections are potentially corresponding. They must
938 have the same size, address, and name. We can't compare section indexes,
939 which would be more reliable, because some sections may have been
941 if (bfd_get_section_size (first) != bfd_get_section_size (second))
944 /* In-memory addresses may start at a different offset, relativize them. */
945 if (bfd_get_section_vma (first->owner, first)
946 - bfd_get_start_address (first->owner)
947 != bfd_get_section_vma (second->owner, second)
948 - bfd_get_start_address (second->owner))
951 if (bfd_get_section_name (first->owner, first) == NULL
952 || bfd_get_section_name (second->owner, second) == NULL
953 || strcmp (bfd_get_section_name (first->owner, first),
954 bfd_get_section_name (second->owner, second)) != 0)
957 /* Otherwise check that they are in corresponding objfiles. */
960 if (obj->obfd == first->owner)
962 gdb_assert (obj != NULL);
964 if (obj->separate_debug_objfile != NULL
965 && obj->separate_debug_objfile->obfd == second->owner)
967 if (obj->separate_debug_objfile_backlink != NULL
968 && obj->separate_debug_objfile_backlink->obfd == second->owner)
975 find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section)
977 struct objfile *objfile;
978 struct minimal_symbol *msymbol;
980 /* If we know that this is not a text address, return failure. This is
981 necessary because we loop based on texthigh and textlow, which do
982 not include the data ranges. */
983 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
985 && (MSYMBOL_TYPE (msymbol) == mst_data
986 || MSYMBOL_TYPE (msymbol) == mst_bss
987 || MSYMBOL_TYPE (msymbol) == mst_abs
988 || MSYMBOL_TYPE (msymbol) == mst_file_data
989 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
992 ALL_OBJFILES (objfile)
994 struct symtab *result = NULL;
997 result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
1006 /* Debug symbols usually don't have section information. We need to dig that
1007 out of the minimal symbols and stash that in the debug symbol. */
1010 fixup_section (struct general_symbol_info *ginfo,
1011 CORE_ADDR addr, struct objfile *objfile)
1013 struct minimal_symbol *msym;
1015 /* First, check whether a minimal symbol with the same name exists
1016 and points to the same address. The address check is required
1017 e.g. on PowerPC64, where the minimal symbol for a function will
1018 point to the function descriptor, while the debug symbol will
1019 point to the actual function code. */
1020 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1023 ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
1024 ginfo->section = SYMBOL_SECTION (msym);
1028 /* Static, function-local variables do appear in the linker
1029 (minimal) symbols, but are frequently given names that won't
1030 be found via lookup_minimal_symbol(). E.g., it has been
1031 observed in frv-uclinux (ELF) executables that a static,
1032 function-local variable named "foo" might appear in the
1033 linker symbols as "foo.6" or "foo.3". Thus, there is no
1034 point in attempting to extend the lookup-by-name mechanism to
1035 handle this case due to the fact that there can be multiple
1038 So, instead, search the section table when lookup by name has
1039 failed. The ``addr'' and ``endaddr'' fields may have already
1040 been relocated. If so, the relocation offset (i.e. the
1041 ANOFFSET value) needs to be subtracted from these values when
1042 performing the comparison. We unconditionally subtract it,
1043 because, when no relocation has been performed, the ANOFFSET
1044 value will simply be zero.
1046 The address of the symbol whose section we're fixing up HAS
1047 NOT BEEN adjusted (relocated) yet. It can't have been since
1048 the section isn't yet known and knowing the section is
1049 necessary in order to add the correct relocation value. In
1050 other words, we wouldn't even be in this function (attempting
1051 to compute the section) if it were already known.
1053 Note that it is possible to search the minimal symbols
1054 (subtracting the relocation value if necessary) to find the
1055 matching minimal symbol, but this is overkill and much less
1056 efficient. It is not necessary to find the matching minimal
1057 symbol, only its section.
1059 Note that this technique (of doing a section table search)
1060 can fail when unrelocated section addresses overlap. For
1061 this reason, we still attempt a lookup by name prior to doing
1062 a search of the section table. */
1064 struct obj_section *s;
1066 ALL_OBJFILE_OSECTIONS (objfile, s)
1068 int idx = s->the_bfd_section->index;
1069 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1071 if (obj_section_addr (s) - offset <= addr
1072 && addr < obj_section_endaddr (s) - offset)
1074 ginfo->obj_section = s;
1075 ginfo->section = idx;
1083 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1090 if (SYMBOL_OBJ_SECTION (sym))
1093 /* We either have an OBJFILE, or we can get at it from the sym's
1094 symtab. Anything else is a bug. */
1095 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1097 if (objfile == NULL)
1098 objfile = SYMBOL_SYMTAB (sym)->objfile;
1100 /* We should have an objfile by now. */
1101 gdb_assert (objfile);
1103 switch (SYMBOL_CLASS (sym))
1107 addr = SYMBOL_VALUE_ADDRESS (sym);
1110 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1114 /* Nothing else will be listed in the minsyms -- no use looking
1119 fixup_section (&sym->ginfo, addr, objfile);
1124 /* Compute the demangled form of NAME as used by the various symbol
1125 lookup functions. The result is stored in *RESULT_NAME. Returns a
1126 cleanup which can be used to clean up the result.
1128 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1129 Normally, Ada symbol lookups are performed using the encoded name
1130 rather than the demangled name, and so it might seem to make sense
1131 for this function to return an encoded version of NAME.
1132 Unfortunately, we cannot do this, because this function is used in
1133 circumstances where it is not appropriate to try to encode NAME.
1134 For instance, when displaying the frame info, we demangle the name
1135 of each parameter, and then perform a symbol lookup inside our
1136 function using that demangled name. In Ada, certain functions
1137 have internally-generated parameters whose name contain uppercase
1138 characters. Encoding those name would result in those uppercase
1139 characters to become lowercase, and thus cause the symbol lookup
1143 demangle_for_lookup (const char *name, enum language lang,
1144 const char **result_name)
1146 char *demangled_name = NULL;
1147 const char *modified_name = NULL;
1148 struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
1150 modified_name = name;
1152 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1153 lookup, so we can always binary search. */
1154 if (lang == language_cplus)
1156 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1159 modified_name = demangled_name;
1160 make_cleanup (xfree, demangled_name);
1164 /* If we were given a non-mangled name, canonicalize it
1165 according to the language (so far only for C++). */
1166 demangled_name = cp_canonicalize_string (name);
1169 modified_name = demangled_name;
1170 make_cleanup (xfree, demangled_name);
1174 else if (lang == language_java)
1176 demangled_name = cplus_demangle (name,
1177 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1180 modified_name = demangled_name;
1181 make_cleanup (xfree, demangled_name);
1184 else if (lang == language_d)
1186 demangled_name = d_demangle (name, 0);
1189 modified_name = demangled_name;
1190 make_cleanup (xfree, demangled_name);
1193 else if (lang == language_go)
1195 demangled_name = go_demangle (name, 0);
1198 modified_name = demangled_name;
1199 make_cleanup (xfree, demangled_name);
1203 *result_name = modified_name;
1207 /* Find the definition for a specified symbol name NAME
1208 in domain DOMAIN, visible from lexical block BLOCK.
1209 Returns the struct symbol pointer, or zero if no symbol is found.
1210 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1211 NAME is a field of the current implied argument `this'. If so set
1212 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1213 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1214 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1216 /* This function (or rather its subordinates) have a bunch of loops and
1217 it would seem to be attractive to put in some QUIT's (though I'm not really
1218 sure whether it can run long enough to be really important). But there
1219 are a few calls for which it would appear to be bad news to quit
1220 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1221 that there is C++ code below which can error(), but that probably
1222 doesn't affect these calls since they are looking for a known
1223 variable and thus can probably assume it will never hit the C++
1227 lookup_symbol_in_language (const char *name, const struct block *block,
1228 const domain_enum domain, enum language lang,
1229 int *is_a_field_of_this)
1231 const char *modified_name;
1232 struct symbol *returnval;
1233 struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name);
1235 returnval = lookup_symbol_aux (modified_name, block, domain, lang,
1236 is_a_field_of_this);
1237 do_cleanups (cleanup);
1242 /* Behave like lookup_symbol_in_language, but performed with the
1243 current language. */
1246 lookup_symbol (const char *name, const struct block *block,
1247 domain_enum domain, int *is_a_field_of_this)
1249 return lookup_symbol_in_language (name, block, domain,
1250 current_language->la_language,
1251 is_a_field_of_this);
1254 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1255 found, or NULL if not found. */
1258 lookup_language_this (const struct language_defn *lang,
1259 const struct block *block)
1261 if (lang->la_name_of_this == NULL || block == NULL)
1268 sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN);
1271 block_found = block;
1274 if (BLOCK_FUNCTION (block))
1276 block = BLOCK_SUPERBLOCK (block);
1282 /* Behave like lookup_symbol except that NAME is the natural name
1283 (e.g., demangled name) of the symbol that we're looking for. */
1285 static struct symbol *
1286 lookup_symbol_aux (const char *name, const struct block *block,
1287 const domain_enum domain, enum language language,
1288 int *is_a_field_of_this)
1291 const struct language_defn *langdef;
1293 /* Make sure we do something sensible with is_a_field_of_this, since
1294 the callers that set this parameter to some non-null value will
1295 certainly use it later and expect it to be either 0 or 1.
1296 If we don't set it, the contents of is_a_field_of_this are
1298 if (is_a_field_of_this != NULL)
1299 *is_a_field_of_this = 0;
1301 /* Search specified block and its superiors. Don't search
1302 STATIC_BLOCK or GLOBAL_BLOCK. */
1304 sym = lookup_symbol_aux_local (name, block, domain, language);
1308 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1309 check to see if NAME is a field of `this'. */
1311 langdef = language_def (language);
1313 if (is_a_field_of_this != NULL)
1315 struct symbol *sym = lookup_language_this (langdef, block);
1319 struct type *t = sym->type;
1321 /* I'm not really sure that type of this can ever
1322 be typedefed; just be safe. */
1324 if (TYPE_CODE (t) == TYPE_CODE_PTR
1325 || TYPE_CODE (t) == TYPE_CODE_REF)
1326 t = TYPE_TARGET_TYPE (t);
1328 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1329 && TYPE_CODE (t) != TYPE_CODE_UNION)
1330 error (_("Internal error: `%s' is not an aggregate"),
1331 langdef->la_name_of_this);
1333 if (check_field (t, name))
1335 *is_a_field_of_this = 1;
1341 /* Now do whatever is appropriate for LANGUAGE to look
1342 up static and global variables. */
1344 sym = langdef->la_lookup_symbol_nonlocal (name, block, domain);
1348 /* Now search all static file-level symbols. Not strictly correct,
1349 but more useful than an error. */
1351 return lookup_static_symbol_aux (name, domain);
1354 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1355 first, then check the psymtabs. If a psymtab indicates the existence of the
1356 desired name as a file-level static, then do psymtab-to-symtab conversion on
1357 the fly and return the found symbol. */
1360 lookup_static_symbol_aux (const char *name, const domain_enum domain)
1362 struct objfile *objfile;
1365 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain);
1369 ALL_OBJFILES (objfile)
1371 sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain);
1379 /* Check to see if the symbol is defined in BLOCK or its superiors.
1380 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1382 static struct symbol *
1383 lookup_symbol_aux_local (const char *name, const struct block *block,
1384 const domain_enum domain,
1385 enum language language)
1388 const struct block *static_block = block_static_block (block);
1389 const char *scope = block_scope (block);
1391 /* Check if either no block is specified or it's a global block. */
1393 if (static_block == NULL)
1396 while (block != static_block)
1398 sym = lookup_symbol_aux_block (name, block, domain);
1402 if (language == language_cplus || language == language_fortran)
1404 sym = cp_lookup_symbol_imports_or_template (scope, name, block,
1410 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
1412 block = BLOCK_SUPERBLOCK (block);
1415 /* We've reached the edge of the function without finding a result. */
1420 /* Look up OBJFILE to BLOCK. */
1423 lookup_objfile_from_block (const struct block *block)
1425 struct objfile *obj;
1431 block = block_global_block (block);
1432 /* Go through SYMTABS. */
1433 ALL_SYMTABS (obj, s)
1434 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1436 if (obj->separate_debug_objfile_backlink)
1437 obj = obj->separate_debug_objfile_backlink;
1445 /* Look up a symbol in a block; if found, fixup the symbol, and set
1446 block_found appropriately. */
1449 lookup_symbol_aux_block (const char *name, const struct block *block,
1450 const domain_enum domain)
1454 sym = lookup_block_symbol (block, name, domain);
1457 block_found = block;
1458 return fixup_symbol_section (sym, NULL);
1464 /* Check all global symbols in OBJFILE in symtabs and
1468 lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
1470 const domain_enum domain)
1472 const struct objfile *objfile;
1474 struct blockvector *bv;
1475 const struct block *block;
1478 for (objfile = main_objfile;
1480 objfile = objfile_separate_debug_iterate (main_objfile, objfile))
1482 /* Go through symtabs. */
1483 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1485 bv = BLOCKVECTOR (s);
1486 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1487 sym = lookup_block_symbol (block, name, domain);
1490 block_found = block;
1491 return fixup_symbol_section (sym, (struct objfile *)objfile);
1495 sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK,
1504 /* Check to see if the symbol is defined in one of the OBJFILE's
1505 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1506 depending on whether or not we want to search global symbols or
1509 static struct symbol *
1510 lookup_symbol_aux_objfile (struct objfile *objfile, int block_index,
1511 const char *name, const domain_enum domain)
1513 struct symbol *sym = NULL;
1514 struct blockvector *bv;
1515 const struct block *block;
1519 objfile->sf->qf->pre_expand_symtabs_matching (objfile, block_index,
1522 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1524 bv = BLOCKVECTOR (s);
1525 block = BLOCKVECTOR_BLOCK (bv, block_index);
1526 sym = lookup_block_symbol (block, name, domain);
1529 block_found = block;
1530 return fixup_symbol_section (sym, objfile);
1537 /* Same as lookup_symbol_aux_objfile, except that it searches all
1538 objfiles. Return the first match found. */
1540 static struct symbol *
1541 lookup_symbol_aux_symtabs (int block_index, const char *name,
1542 const domain_enum domain)
1545 struct objfile *objfile;
1547 ALL_OBJFILES (objfile)
1549 sym = lookup_symbol_aux_objfile (objfile, block_index, name, domain);
1557 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1558 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1559 and all related objfiles. */
1561 static struct symbol *
1562 lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
1563 const char *linkage_name,
1566 enum language lang = current_language->la_language;
1567 const char *modified_name;
1568 struct cleanup *cleanup = demangle_for_lookup (linkage_name, lang,
1570 struct objfile *main_objfile, *cur_objfile;
1572 if (objfile->separate_debug_objfile_backlink)
1573 main_objfile = objfile->separate_debug_objfile_backlink;
1575 main_objfile = objfile;
1577 for (cur_objfile = main_objfile;
1579 cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile))
1583 sym = lookup_symbol_aux_objfile (cur_objfile, GLOBAL_BLOCK,
1584 modified_name, domain);
1586 sym = lookup_symbol_aux_objfile (cur_objfile, STATIC_BLOCK,
1587 modified_name, domain);
1590 do_cleanups (cleanup);
1595 do_cleanups (cleanup);
1599 /* A helper function for lookup_symbol_aux that interfaces with the
1600 "quick" symbol table functions. */
1602 static struct symbol *
1603 lookup_symbol_aux_quick (struct objfile *objfile, int kind,
1604 const char *name, const domain_enum domain)
1606 struct symtab *symtab;
1607 struct blockvector *bv;
1608 const struct block *block;
1613 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain);
1617 bv = BLOCKVECTOR (symtab);
1618 block = BLOCKVECTOR_BLOCK (bv, kind);
1619 sym = lookup_block_symbol (block, name, domain);
1622 /* This shouldn't be necessary, but as a last resort try
1623 looking in the statics even though the psymtab claimed
1624 the symbol was global, or vice-versa. It's possible
1625 that the psymtab gets it wrong in some cases. */
1627 /* FIXME: carlton/2002-09-30: Should we really do that?
1628 If that happens, isn't it likely to be a GDB error, in
1629 which case we should fix the GDB error rather than
1630 silently dealing with it here? So I'd vote for
1631 removing the check for the symbol in the other
1633 block = BLOCKVECTOR_BLOCK (bv,
1634 kind == GLOBAL_BLOCK ?
1635 STATIC_BLOCK : GLOBAL_BLOCK);
1636 sym = lookup_block_symbol (block, name, domain);
1639 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1640 %s may be an inlined function, or may be a template function\n\
1641 (if a template, try specifying an instantiation: %s<type>)."),
1642 kind == GLOBAL_BLOCK ? "global" : "static",
1643 name, symtab->filename, name, name);
1645 return fixup_symbol_section (sym, objfile);
1648 /* A default version of lookup_symbol_nonlocal for use by languages
1649 that can't think of anything better to do. This implements the C
1653 basic_lookup_symbol_nonlocal (const char *name,
1654 const struct block *block,
1655 const domain_enum domain)
1659 /* NOTE: carlton/2003-05-19: The comments below were written when
1660 this (or what turned into this) was part of lookup_symbol_aux;
1661 I'm much less worried about these questions now, since these
1662 decisions have turned out well, but I leave these comments here
1665 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1666 not it would be appropriate to search the current global block
1667 here as well. (That's what this code used to do before the
1668 is_a_field_of_this check was moved up.) On the one hand, it's
1669 redundant with the lookup_symbol_aux_symtabs search that happens
1670 next. On the other hand, if decode_line_1 is passed an argument
1671 like filename:var, then the user presumably wants 'var' to be
1672 searched for in filename. On the third hand, there shouldn't be
1673 multiple global variables all of which are named 'var', and it's
1674 not like decode_line_1 has ever restricted its search to only
1675 global variables in a single filename. All in all, only
1676 searching the static block here seems best: it's correct and it's
1679 /* NOTE: carlton/2002-12-05: There's also a possible performance
1680 issue here: if you usually search for global symbols in the
1681 current file, then it would be slightly better to search the
1682 current global block before searching all the symtabs. But there
1683 are other factors that have a much greater effect on performance
1684 than that one, so I don't think we should worry about that for
1687 sym = lookup_symbol_static (name, block, domain);
1691 return lookup_symbol_global (name, block, domain);
1694 /* Lookup a symbol in the static block associated to BLOCK, if there
1695 is one; do nothing if BLOCK is NULL or a global block. */
1698 lookup_symbol_static (const char *name,
1699 const struct block *block,
1700 const domain_enum domain)
1702 const struct block *static_block = block_static_block (block);
1704 if (static_block != NULL)
1705 return lookup_symbol_aux_block (name, static_block, domain);
1710 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1712 struct global_sym_lookup_data
1714 /* The name of the symbol we are searching for. */
1717 /* The domain to use for our search. */
1720 /* The field where the callback should store the symbol if found.
1721 It should be initialized to NULL before the search is started. */
1722 struct symbol *result;
1725 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1726 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1727 OBJFILE. The arguments for the search are passed via CB_DATA,
1728 which in reality is a pointer to struct global_sym_lookup_data. */
1731 lookup_symbol_global_iterator_cb (struct objfile *objfile,
1734 struct global_sym_lookup_data *data =
1735 (struct global_sym_lookup_data *) cb_data;
1737 gdb_assert (data->result == NULL);
1739 data->result = lookup_symbol_aux_objfile (objfile, GLOBAL_BLOCK,
1740 data->name, data->domain);
1741 if (data->result == NULL)
1742 data->result = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK,
1743 data->name, data->domain);
1745 /* If we found a match, tell the iterator to stop. Otherwise,
1747 return (data->result != NULL);
1750 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1754 lookup_symbol_global (const char *name,
1755 const struct block *block,
1756 const domain_enum domain)
1758 struct symbol *sym = NULL;
1759 struct objfile *objfile = NULL;
1760 struct global_sym_lookup_data lookup_data;
1762 /* Call library-specific lookup procedure. */
1763 objfile = lookup_objfile_from_block (block);
1764 if (objfile != NULL)
1765 sym = solib_global_lookup (objfile, name, domain);
1769 memset (&lookup_data, 0, sizeof (lookup_data));
1770 lookup_data.name = name;
1771 lookup_data.domain = domain;
1772 gdbarch_iterate_over_objfiles_in_search_order
1773 (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch,
1774 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
1776 return lookup_data.result;
1780 symbol_matches_domain (enum language symbol_language,
1781 domain_enum symbol_domain,
1784 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1785 A Java class declaration also defines a typedef for the class.
1786 Similarly, any Ada type declaration implicitly defines a typedef. */
1787 if (symbol_language == language_cplus
1788 || symbol_language == language_d
1789 || symbol_language == language_java
1790 || symbol_language == language_ada)
1792 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1793 && symbol_domain == STRUCT_DOMAIN)
1796 /* For all other languages, strict match is required. */
1797 return (symbol_domain == domain);
1800 /* Look up a type named NAME in the struct_domain. The type returned
1801 must not be opaque -- i.e., must have at least one field
1805 lookup_transparent_type (const char *name)
1807 return current_language->la_lookup_transparent_type (name);
1810 /* A helper for basic_lookup_transparent_type that interfaces with the
1811 "quick" symbol table functions. */
1813 static struct type *
1814 basic_lookup_transparent_type_quick (struct objfile *objfile, int kind,
1817 struct symtab *symtab;
1818 struct blockvector *bv;
1819 struct block *block;
1824 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN);
1828 bv = BLOCKVECTOR (symtab);
1829 block = BLOCKVECTOR_BLOCK (bv, kind);
1830 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1833 int other_kind = kind == GLOBAL_BLOCK ? STATIC_BLOCK : GLOBAL_BLOCK;
1835 /* This shouldn't be necessary, but as a last resort
1836 * try looking in the 'other kind' even though the psymtab
1837 * claimed the symbol was one thing. It's possible that
1838 * the psymtab gets it wrong in some cases.
1840 block = BLOCKVECTOR_BLOCK (bv, other_kind);
1841 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1843 /* FIXME; error is wrong in one case. */
1845 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1846 %s may be an inlined function, or may be a template function\n\
1847 (if a template, try specifying an instantiation: %s<type>)."),
1848 name, symtab->filename, name, name);
1850 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1851 return SYMBOL_TYPE (sym);
1856 /* The standard implementation of lookup_transparent_type. This code
1857 was modeled on lookup_symbol -- the parts not relevant to looking
1858 up types were just left out. In particular it's assumed here that
1859 types are available in struct_domain and only at file-static or
1863 basic_lookup_transparent_type (const char *name)
1866 struct symtab *s = NULL;
1867 struct blockvector *bv;
1868 struct objfile *objfile;
1869 struct block *block;
1872 /* Now search all the global symbols. Do the symtab's first, then
1873 check the psymtab's. If a psymtab indicates the existence
1874 of the desired name as a global, then do psymtab-to-symtab
1875 conversion on the fly and return the found symbol. */
1877 ALL_OBJFILES (objfile)
1880 objfile->sf->qf->pre_expand_symtabs_matching (objfile,
1882 name, STRUCT_DOMAIN);
1884 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1886 bv = BLOCKVECTOR (s);
1887 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1888 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1889 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1891 return SYMBOL_TYPE (sym);
1896 ALL_OBJFILES (objfile)
1898 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
1903 /* Now search the static file-level symbols.
1904 Not strictly correct, but more useful than an error.
1905 Do the symtab's first, then
1906 check the psymtab's. If a psymtab indicates the existence
1907 of the desired name as a file-level static, then do psymtab-to-symtab
1908 conversion on the fly and return the found symbol. */
1910 ALL_OBJFILES (objfile)
1913 objfile->sf->qf->pre_expand_symtabs_matching (objfile, STATIC_BLOCK,
1914 name, STRUCT_DOMAIN);
1916 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1918 bv = BLOCKVECTOR (s);
1919 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1920 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1921 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1923 return SYMBOL_TYPE (sym);
1928 ALL_OBJFILES (objfile)
1930 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
1935 return (struct type *) 0;
1938 /* Find the name of the file containing main(). */
1939 /* FIXME: What about languages without main() or specially linked
1940 executables that have no main() ? */
1943 find_main_filename (void)
1945 struct objfile *objfile;
1946 char *name = main_name ();
1948 ALL_OBJFILES (objfile)
1954 result = objfile->sf->qf->find_symbol_file (objfile, name);
1961 /* Search BLOCK for symbol NAME in DOMAIN.
1963 Note that if NAME is the demangled form of a C++ symbol, we will fail
1964 to find a match during the binary search of the non-encoded names, but
1965 for now we don't worry about the slight inefficiency of looking for
1966 a match we'll never find, since it will go pretty quick. Once the
1967 binary search terminates, we drop through and do a straight linear
1968 search on the symbols. Each symbol which is marked as being a ObjC/C++
1969 symbol (language_cplus or language_objc set) has both the encoded and
1970 non-encoded names tested for a match. */
1973 lookup_block_symbol (const struct block *block, const char *name,
1974 const domain_enum domain)
1976 struct block_iterator iter;
1979 if (!BLOCK_FUNCTION (block))
1981 for (sym = block_iter_name_first (block, name, &iter);
1983 sym = block_iter_name_next (name, &iter))
1985 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1986 SYMBOL_DOMAIN (sym), domain))
1993 /* Note that parameter symbols do not always show up last in the
1994 list; this loop makes sure to take anything else other than
1995 parameter symbols first; it only uses parameter symbols as a
1996 last resort. Note that this only takes up extra computation
1999 struct symbol *sym_found = NULL;
2001 for (sym = block_iter_name_first (block, name, &iter);
2003 sym = block_iter_name_next (name, &iter))
2005 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2006 SYMBOL_DOMAIN (sym), domain))
2009 if (!SYMBOL_IS_ARGUMENT (sym))
2015 return (sym_found); /* Will be NULL if not found. */
2019 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
2022 For each symbol that matches, CALLBACK is called. The symbol and
2023 DATA are passed to the callback.
2025 If CALLBACK returns zero, the iteration ends. Otherwise, the
2026 search continues. This function iterates upward through blocks.
2027 When the outermost block has been finished, the function
2031 iterate_over_symbols (const struct block *block, const char *name,
2032 const domain_enum domain,
2033 symbol_found_callback_ftype *callback,
2038 struct block_iterator iter;
2041 for (sym = block_iter_name_first (block, name, &iter);
2043 sym = block_iter_name_next (name, &iter))
2045 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2046 SYMBOL_DOMAIN (sym), domain))
2048 if (!callback (sym, data))
2053 block = BLOCK_SUPERBLOCK (block);
2057 /* Find the symtab associated with PC and SECTION. Look through the
2058 psymtabs and read in another symtab if necessary. */
2061 find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
2064 struct blockvector *bv;
2065 struct symtab *s = NULL;
2066 struct symtab *best_s = NULL;
2067 struct objfile *objfile;
2068 struct program_space *pspace;
2069 CORE_ADDR distance = 0;
2070 struct minimal_symbol *msymbol;
2072 pspace = current_program_space;
2074 /* If we know that this is not a text address, return failure. This is
2075 necessary because we loop based on the block's high and low code
2076 addresses, which do not include the data ranges, and because
2077 we call find_pc_sect_psymtab which has a similar restriction based
2078 on the partial_symtab's texthigh and textlow. */
2079 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
2081 && (MSYMBOL_TYPE (msymbol) == mst_data
2082 || MSYMBOL_TYPE (msymbol) == mst_bss
2083 || MSYMBOL_TYPE (msymbol) == mst_abs
2084 || MSYMBOL_TYPE (msymbol) == mst_file_data
2085 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
2088 /* Search all symtabs for the one whose file contains our address, and which
2089 is the smallest of all the ones containing the address. This is designed
2090 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2091 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2092 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2094 This happens for native ecoff format, where code from included files
2095 gets its own symtab. The symtab for the included file should have
2096 been read in already via the dependency mechanism.
2097 It might be swifter to create several symtabs with the same name
2098 like xcoff does (I'm not sure).
2100 It also happens for objfiles that have their functions reordered.
2101 For these, the symtab we are looking for is not necessarily read in. */
2103 ALL_PRIMARY_SYMTABS (objfile, s)
2105 bv = BLOCKVECTOR (s);
2106 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2108 if (BLOCK_START (b) <= pc
2109 && BLOCK_END (b) > pc
2111 || BLOCK_END (b) - BLOCK_START (b) < distance))
2113 /* For an objfile that has its functions reordered,
2114 find_pc_psymtab will find the proper partial symbol table
2115 and we simply return its corresponding symtab. */
2116 /* In order to better support objfiles that contain both
2117 stabs and coff debugging info, we continue on if a psymtab
2119 if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
2121 struct symtab *result;
2124 = objfile->sf->qf->find_pc_sect_symtab (objfile,
2133 struct block_iterator iter;
2134 struct symbol *sym = NULL;
2136 ALL_BLOCK_SYMBOLS (b, iter, sym)
2138 fixup_symbol_section (sym, objfile);
2139 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
2143 continue; /* No symbol in this symtab matches
2146 distance = BLOCK_END (b) - BLOCK_START (b);
2154 ALL_OBJFILES (objfile)
2156 struct symtab *result;
2160 result = objfile->sf->qf->find_pc_sect_symtab (objfile,
2171 /* Find the symtab associated with PC. Look through the psymtabs and read
2172 in another symtab if necessary. Backward compatibility, no section. */
2175 find_pc_symtab (CORE_ADDR pc)
2177 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2181 /* Find the source file and line number for a given PC value and SECTION.
2182 Return a structure containing a symtab pointer, a line number,
2183 and a pc range for the entire source line.
2184 The value's .pc field is NOT the specified pc.
2185 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2186 use the line that ends there. Otherwise, in that case, the line
2187 that begins there is used. */
2189 /* The big complication here is that a line may start in one file, and end just
2190 before the start of another file. This usually occurs when you #include
2191 code in the middle of a subroutine. To properly find the end of a line's PC
2192 range, we must search all symtabs associated with this compilation unit, and
2193 find the one whose first PC is closer than that of the next line in this
2196 /* If it's worth the effort, we could be using a binary search. */
2198 struct symtab_and_line
2199 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
2202 struct linetable *l;
2205 struct linetable_entry *item;
2206 struct symtab_and_line val;
2207 struct blockvector *bv;
2208 struct minimal_symbol *msymbol;
2209 struct minimal_symbol *mfunsym;
2210 struct objfile *objfile;
2212 /* Info on best line seen so far, and where it starts, and its file. */
2214 struct linetable_entry *best = NULL;
2215 CORE_ADDR best_end = 0;
2216 struct symtab *best_symtab = 0;
2218 /* Store here the first line number
2219 of a file which contains the line at the smallest pc after PC.
2220 If we don't find a line whose range contains PC,
2221 we will use a line one less than this,
2222 with a range from the start of that file to the first line's pc. */
2223 struct linetable_entry *alt = NULL;
2224 struct symtab *alt_symtab = 0;
2226 /* Info on best line seen in this file. */
2228 struct linetable_entry *prev;
2230 /* If this pc is not from the current frame,
2231 it is the address of the end of a call instruction.
2232 Quite likely that is the start of the following statement.
2233 But what we want is the statement containing the instruction.
2234 Fudge the pc to make sure we get that. */
2236 init_sal (&val); /* initialize to zeroes */
2238 val.pspace = current_program_space;
2240 /* It's tempting to assume that, if we can't find debugging info for
2241 any function enclosing PC, that we shouldn't search for line
2242 number info, either. However, GAS can emit line number info for
2243 assembly files --- very helpful when debugging hand-written
2244 assembly code. In such a case, we'd have no debug info for the
2245 function, but we would have line info. */
2250 /* elz: added this because this function returned the wrong
2251 information if the pc belongs to a stub (import/export)
2252 to call a shlib function. This stub would be anywhere between
2253 two functions in the target, and the line info was erroneously
2254 taken to be the one of the line before the pc. */
2256 /* RT: Further explanation:
2258 * We have stubs (trampolines) inserted between procedures.
2260 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2261 * exists in the main image.
2263 * In the minimal symbol table, we have a bunch of symbols
2264 * sorted by start address. The stubs are marked as "trampoline",
2265 * the others appear as text. E.g.:
2267 * Minimal symbol table for main image
2268 * main: code for main (text symbol)
2269 * shr1: stub (trampoline symbol)
2270 * foo: code for foo (text symbol)
2272 * Minimal symbol table for "shr1" image:
2274 * shr1: code for shr1 (text symbol)
2277 * So the code below is trying to detect if we are in the stub
2278 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2279 * and if found, do the symbolization from the real-code address
2280 * rather than the stub address.
2282 * Assumptions being made about the minimal symbol table:
2283 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2284 * if we're really in the trampoline.s If we're beyond it (say
2285 * we're in "foo" in the above example), it'll have a closer
2286 * symbol (the "foo" text symbol for example) and will not
2287 * return the trampoline.
2288 * 2. lookup_minimal_symbol_text() will find a real text symbol
2289 * corresponding to the trampoline, and whose address will
2290 * be different than the trampoline address. I put in a sanity
2291 * check for the address being the same, to avoid an
2292 * infinite recursion.
2294 msymbol = lookup_minimal_symbol_by_pc (pc);
2295 if (msymbol != NULL)
2296 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2298 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2300 if (mfunsym == NULL)
2301 /* I eliminated this warning since it is coming out
2302 * in the following situation:
2303 * gdb shmain // test program with shared libraries
2304 * (gdb) break shr1 // function in shared lib
2305 * Warning: In stub for ...
2306 * In the above situation, the shared lib is not loaded yet,
2307 * so of course we can't find the real func/line info,
2308 * but the "break" still works, and the warning is annoying.
2309 * So I commented out the warning. RT */
2310 /* warning ("In stub for %s; unable to find real function/line info",
2311 SYMBOL_LINKAGE_NAME (msymbol)); */
2314 else if (SYMBOL_VALUE_ADDRESS (mfunsym)
2315 == SYMBOL_VALUE_ADDRESS (msymbol))
2316 /* Avoid infinite recursion */
2317 /* See above comment about why warning is commented out. */
2318 /* warning ("In stub for %s; unable to find real function/line info",
2319 SYMBOL_LINKAGE_NAME (msymbol)); */
2323 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2327 s = find_pc_sect_symtab (pc, section);
2330 /* If no symbol information, return previous pc. */
2337 bv = BLOCKVECTOR (s);
2338 objfile = s->objfile;
2340 /* Look at all the symtabs that share this blockvector.
2341 They all have the same apriori range, that we found was right;
2342 but they have different line tables. */
2344 ALL_OBJFILE_SYMTABS (objfile, s)
2346 if (BLOCKVECTOR (s) != bv)
2349 /* Find the best line in this symtab. */
2356 /* I think len can be zero if the symtab lacks line numbers
2357 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2358 I'm not sure which, and maybe it depends on the symbol
2364 item = l->item; /* Get first line info. */
2366 /* Is this file's first line closer than the first lines of other files?
2367 If so, record this file, and its first line, as best alternate. */
2368 if (item->pc > pc && (!alt || item->pc < alt->pc))
2374 for (i = 0; i < len; i++, item++)
2376 /* Leave prev pointing to the linetable entry for the last line
2377 that started at or before PC. */
2384 /* At this point, prev points at the line whose start addr is <= pc, and
2385 item points at the next line. If we ran off the end of the linetable
2386 (pc >= start of the last line), then prev == item. If pc < start of
2387 the first line, prev will not be set. */
2389 /* Is this file's best line closer than the best in the other files?
2390 If so, record this file, and its best line, as best so far. Don't
2391 save prev if it represents the end of a function (i.e. line number
2392 0) instead of a real line. */
2394 if (prev && prev->line && (!best || prev->pc > best->pc))
2399 /* Discard BEST_END if it's before the PC of the current BEST. */
2400 if (best_end <= best->pc)
2404 /* If another line (denoted by ITEM) is in the linetable and its
2405 PC is after BEST's PC, but before the current BEST_END, then
2406 use ITEM's PC as the new best_end. */
2407 if (best && i < len && item->pc > best->pc
2408 && (best_end == 0 || best_end > item->pc))
2409 best_end = item->pc;
2414 /* If we didn't find any line number info, just return zeros.
2415 We used to return alt->line - 1 here, but that could be
2416 anywhere; if we don't have line number info for this PC,
2417 don't make some up. */
2420 else if (best->line == 0)
2422 /* If our best fit is in a range of PC's for which no line
2423 number info is available (line number is zero) then we didn't
2424 find any valid line information. */
2429 val.symtab = best_symtab;
2430 val.line = best->line;
2432 if (best_end && (!alt || best_end < alt->pc))
2437 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2439 val.section = section;
2443 /* Backward compatibility (no section). */
2445 struct symtab_and_line
2446 find_pc_line (CORE_ADDR pc, int notcurrent)
2448 struct obj_section *section;
2450 section = find_pc_overlay (pc);
2451 if (pc_in_unmapped_range (pc, section))
2452 pc = overlay_mapped_address (pc, section);
2453 return find_pc_sect_line (pc, section, notcurrent);
2456 /* Find line number LINE in any symtab whose name is the same as
2459 If found, return the symtab that contains the linetable in which it was
2460 found, set *INDEX to the index in the linetable of the best entry
2461 found, and set *EXACT_MATCH nonzero if the value returned is an
2464 If not found, return NULL. */
2467 find_line_symtab (struct symtab *symtab, int line,
2468 int *index, int *exact_match)
2470 int exact = 0; /* Initialized here to avoid a compiler warning. */
2472 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2476 struct linetable *best_linetable;
2477 struct symtab *best_symtab;
2479 /* First try looking it up in the given symtab. */
2480 best_linetable = LINETABLE (symtab);
2481 best_symtab = symtab;
2482 best_index = find_line_common (best_linetable, line, &exact, 0);
2483 if (best_index < 0 || !exact)
2485 /* Didn't find an exact match. So we better keep looking for
2486 another symtab with the same name. In the case of xcoff,
2487 multiple csects for one source file (produced by IBM's FORTRAN
2488 compiler) produce multiple symtabs (this is unavoidable
2489 assuming csects can be at arbitrary places in memory and that
2490 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2492 /* BEST is the smallest linenumber > LINE so far seen,
2493 or 0 if none has been seen so far.
2494 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2497 struct objfile *objfile;
2500 if (best_index >= 0)
2501 best = best_linetable->item[best_index].line;
2505 ALL_OBJFILES (objfile)
2508 objfile->sf->qf->expand_symtabs_with_filename (objfile,
2512 /* Get symbol full file name if possible. */
2513 symtab_to_fullname (symtab);
2515 ALL_SYMTABS (objfile, s)
2517 struct linetable *l;
2520 if (FILENAME_CMP (symtab->filename, s->filename) != 0)
2522 if (symtab->fullname != NULL
2523 && symtab_to_fullname (s) != NULL
2524 && FILENAME_CMP (symtab->fullname, s->fullname) != 0)
2527 ind = find_line_common (l, line, &exact, 0);
2537 if (best == 0 || l->item[ind].line < best)
2539 best = l->item[ind].line;
2552 *index = best_index;
2554 *exact_match = exact;
2559 /* Given SYMTAB, returns all the PCs function in the symtab that
2560 exactly match LINE. Returns NULL if there are no exact matches,
2561 but updates BEST_ITEM in this case. */
2564 find_pcs_for_symtab_line (struct symtab *symtab, int line,
2565 struct linetable_entry **best_item)
2568 struct symbol *previous_function = NULL;
2569 VEC (CORE_ADDR) *result = NULL;
2571 /* First, collect all the PCs that are at this line. */
2577 idx = find_line_common (LINETABLE (symtab), line, &was_exact, start);
2583 struct linetable_entry *item = &LINETABLE (symtab)->item[idx];
2585 if (*best_item == NULL || item->line < (*best_item)->line)
2591 VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc);
2599 /* Set the PC value for a given source file and line number and return true.
2600 Returns zero for invalid line number (and sets the PC to 0).
2601 The source file is specified with a struct symtab. */
2604 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2606 struct linetable *l;
2613 symtab = find_line_symtab (symtab, line, &ind, NULL);
2616 l = LINETABLE (symtab);
2617 *pc = l->item[ind].pc;
2624 /* Find the range of pc values in a line.
2625 Store the starting pc of the line into *STARTPTR
2626 and the ending pc (start of next line) into *ENDPTR.
2627 Returns 1 to indicate success.
2628 Returns 0 if could not find the specified line. */
2631 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2634 CORE_ADDR startaddr;
2635 struct symtab_and_line found_sal;
2638 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2641 /* This whole function is based on address. For example, if line 10 has
2642 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2643 "info line *0x123" should say the line goes from 0x100 to 0x200
2644 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2645 This also insures that we never give a range like "starts at 0x134
2646 and ends at 0x12c". */
2648 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2649 if (found_sal.line != sal.line)
2651 /* The specified line (sal) has zero bytes. */
2652 *startptr = found_sal.pc;
2653 *endptr = found_sal.pc;
2657 *startptr = found_sal.pc;
2658 *endptr = found_sal.end;
2663 /* Given a line table and a line number, return the index into the line
2664 table for the pc of the nearest line whose number is >= the specified one.
2665 Return -1 if none is found. The value is >= 0 if it is an index.
2666 START is the index at which to start searching the line table.
2668 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2671 find_line_common (struct linetable *l, int lineno,
2672 int *exact_match, int start)
2677 /* BEST is the smallest linenumber > LINENO so far seen,
2678 or 0 if none has been seen so far.
2679 BEST_INDEX identifies the item for it. */
2681 int best_index = -1;
2692 for (i = start; i < len; i++)
2694 struct linetable_entry *item = &(l->item[i]);
2696 if (item->line == lineno)
2698 /* Return the first (lowest address) entry which matches. */
2703 if (item->line > lineno && (best == 0 || item->line < best))
2710 /* If we got here, we didn't get an exact match. */
2715 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2717 struct symtab_and_line sal;
2719 sal = find_pc_line (pc, 0);
2722 return sal.symtab != 0;
2725 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2726 address for that function that has an entry in SYMTAB's line info
2727 table. If such an entry cannot be found, return FUNC_ADDR
2731 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
2733 CORE_ADDR func_start, func_end;
2734 struct linetable *l;
2737 /* Give up if this symbol has no lineinfo table. */
2738 l = LINETABLE (symtab);
2742 /* Get the range for the function's PC values, or give up if we
2743 cannot, for some reason. */
2744 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
2747 /* Linetable entries are ordered by PC values, see the commentary in
2748 symtab.h where `struct linetable' is defined. Thus, the first
2749 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2750 address we are looking for. */
2751 for (i = 0; i < l->nitems; i++)
2753 struct linetable_entry *item = &(l->item[i]);
2755 /* Don't use line numbers of zero, they mark special entries in
2756 the table. See the commentary on symtab.h before the
2757 definition of struct linetable. */
2758 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
2765 /* Given a function symbol SYM, find the symtab and line for the start
2767 If the argument FUNFIRSTLINE is nonzero, we want the first line
2768 of real code inside the function. */
2770 struct symtab_and_line
2771 find_function_start_sal (struct symbol *sym, int funfirstline)
2773 struct symtab_and_line sal;
2775 fixup_symbol_section (sym, NULL);
2776 sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
2777 SYMBOL_OBJ_SECTION (sym), 0);
2779 /* We always should have a line for the function start address.
2780 If we don't, something is odd. Create a plain SAL refering
2781 just the PC and hope that skip_prologue_sal (if requested)
2782 can find a line number for after the prologue. */
2783 if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym)))
2786 sal.pspace = current_program_space;
2787 sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2788 sal.section = SYMBOL_OBJ_SECTION (sym);
2792 skip_prologue_sal (&sal);
2797 /* Adjust SAL to the first instruction past the function prologue.
2798 If the PC was explicitly specified, the SAL is not changed.
2799 If the line number was explicitly specified, at most the SAL's PC
2800 is updated. If SAL is already past the prologue, then do nothing. */
2803 skip_prologue_sal (struct symtab_and_line *sal)
2806 struct symtab_and_line start_sal;
2807 struct cleanup *old_chain;
2808 CORE_ADDR pc, saved_pc;
2809 struct obj_section *section;
2811 struct objfile *objfile;
2812 struct gdbarch *gdbarch;
2813 struct block *b, *function_block;
2814 int force_skip, skip;
2816 /* Do not change the SAL is PC was specified explicitly. */
2817 if (sal->explicit_pc)
2820 old_chain = save_current_space_and_thread ();
2821 switch_to_program_space_and_thread (sal->pspace);
2823 sym = find_pc_sect_function (sal->pc, sal->section);
2826 fixup_symbol_section (sym, NULL);
2828 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2829 section = SYMBOL_OBJ_SECTION (sym);
2830 name = SYMBOL_LINKAGE_NAME (sym);
2831 objfile = SYMBOL_SYMTAB (sym)->objfile;
2835 struct minimal_symbol *msymbol
2836 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
2838 if (msymbol == NULL)
2840 do_cleanups (old_chain);
2844 pc = SYMBOL_VALUE_ADDRESS (msymbol);
2845 section = SYMBOL_OBJ_SECTION (msymbol);
2846 name = SYMBOL_LINKAGE_NAME (msymbol);
2847 objfile = msymbol_objfile (msymbol);
2850 gdbarch = get_objfile_arch (objfile);
2852 /* Process the prologue in two passes. In the first pass try to skip the
2853 prologue (SKIP is true) and verify there is a real need for it (indicated
2854 by FORCE_SKIP). If no such reason was found run a second pass where the
2855 prologue is not skipped (SKIP is false). */
2860 /* Be conservative - allow direct PC (without skipping prologue) only if we
2861 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2862 have to be set by the caller so we use SYM instead. */
2863 if (sym && SYMBOL_SYMTAB (sym)->locations_valid)
2871 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2872 so that gdbarch_skip_prologue has something unique to work on. */
2873 if (section_is_overlay (section) && !section_is_mapped (section))
2874 pc = overlay_unmapped_address (pc, section);
2876 /* Skip "first line" of function (which is actually its prologue). */
2877 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2879 pc = gdbarch_skip_prologue (gdbarch, pc);
2881 /* For overlays, map pc back into its mapped VMA range. */
2882 pc = overlay_mapped_address (pc, section);
2884 /* Calculate line number. */
2885 start_sal = find_pc_sect_line (pc, section, 0);
2887 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2888 line is still part of the same function. */
2889 if (skip && start_sal.pc != pc
2890 && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
2891 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2892 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section)
2893 == lookup_minimal_symbol_by_pc_section (pc, section))))
2895 /* First pc of next line */
2897 /* Recalculate the line number (might not be N+1). */
2898 start_sal = find_pc_sect_line (pc, section, 0);
2901 /* On targets with executable formats that don't have a concept of
2902 constructors (ELF with .init has, PE doesn't), gcc emits a call
2903 to `__main' in `main' between the prologue and before user
2905 if (gdbarch_skip_main_prologue_p (gdbarch)
2906 && name && strcmp_iw (name, "main") == 0)
2908 pc = gdbarch_skip_main_prologue (gdbarch, pc);
2909 /* Recalculate the line number (might not be N+1). */
2910 start_sal = find_pc_sect_line (pc, section, 0);
2914 while (!force_skip && skip--);
2916 /* If we still don't have a valid source line, try to find the first
2917 PC in the lineinfo table that belongs to the same function. This
2918 happens with COFF debug info, which does not seem to have an
2919 entry in lineinfo table for the code after the prologue which has
2920 no direct relation to source. For example, this was found to be
2921 the case with the DJGPP target using "gcc -gcoff" when the
2922 compiler inserted code after the prologue to make sure the stack
2924 if (!force_skip && sym && start_sal.symtab == NULL)
2926 pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
2927 /* Recalculate the line number. */
2928 start_sal = find_pc_sect_line (pc, section, 0);
2931 do_cleanups (old_chain);
2933 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2934 forward SAL to the end of the prologue. */
2939 sal->section = section;
2941 /* Unless the explicit_line flag was set, update the SAL line
2942 and symtab to correspond to the modified PC location. */
2943 if (sal->explicit_line)
2946 sal->symtab = start_sal.symtab;
2947 sal->line = start_sal.line;
2948 sal->end = start_sal.end;
2950 /* Check if we are now inside an inlined function. If we can,
2951 use the call site of the function instead. */
2952 b = block_for_pc_sect (sal->pc, sal->section);
2953 function_block = NULL;
2956 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
2958 else if (BLOCK_FUNCTION (b) != NULL)
2960 b = BLOCK_SUPERBLOCK (b);
2962 if (function_block != NULL
2963 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
2965 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
2966 sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
2970 /* If P is of the form "operator[ \t]+..." where `...' is
2971 some legitimate operator text, return a pointer to the
2972 beginning of the substring of the operator text.
2973 Otherwise, return "". */
2976 operator_chars (char *p, char **end)
2979 if (strncmp (p, "operator", 8))
2983 /* Don't get faked out by `operator' being part of a longer
2985 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2988 /* Allow some whitespace between `operator' and the operator symbol. */
2989 while (*p == ' ' || *p == '\t')
2992 /* Recognize 'operator TYPENAME'. */
2994 if (isalpha (*p) || *p == '_' || *p == '$')
2998 while (isalnum (*q) || *q == '_' || *q == '$')
3007 case '\\': /* regexp quoting */
3010 if (p[2] == '=') /* 'operator\*=' */
3012 else /* 'operator\*' */
3016 else if (p[1] == '[')
3019 error (_("mismatched quoting on brackets, "
3020 "try 'operator\\[\\]'"));
3021 else if (p[2] == '\\' && p[3] == ']')
3023 *end = p + 4; /* 'operator\[\]' */
3027 error (_("nothing is allowed between '[' and ']'"));
3031 /* Gratuitous qoute: skip it and move on. */
3053 if (p[0] == '-' && p[1] == '>')
3055 /* Struct pointer member operator 'operator->'. */
3058 *end = p + 3; /* 'operator->*' */
3061 else if (p[2] == '\\')
3063 *end = p + 4; /* Hopefully 'operator->\*' */
3068 *end = p + 2; /* 'operator->' */
3072 if (p[1] == '=' || p[1] == p[0])
3083 error (_("`operator ()' must be specified "
3084 "without whitespace in `()'"));
3089 error (_("`operator ?:' must be specified "
3090 "without whitespace in `?:'"));
3095 error (_("`operator []' must be specified "
3096 "without whitespace in `[]'"));
3100 error (_("`operator %s' not supported"), p);
3109 /* If FILE is not already in the table of files, return zero;
3110 otherwise return non-zero. Optionally add FILE to the table if ADD
3111 is non-zero. If *FIRST is non-zero, forget the old table
3115 filename_seen (const char *file, int add, int *first)
3117 /* Table of files seen so far. */
3118 static const char **tab = NULL;
3119 /* Allocated size of tab in elements.
3120 Start with one 256-byte block (when using GNU malloc.c).
3121 24 is the malloc overhead when range checking is in effect. */
3122 static int tab_alloc_size = (256 - 24) / sizeof (char *);
3123 /* Current size of tab in elements. */
3124 static int tab_cur_size;
3130 tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
3134 /* Is FILE in tab? */
3135 for (p = tab; p < tab + tab_cur_size; p++)
3136 if (filename_cmp (*p, file) == 0)
3139 /* No; maybe add it to tab. */
3142 if (tab_cur_size == tab_alloc_size)
3144 tab_alloc_size *= 2;
3145 tab = (const char **) xrealloc ((char *) tab,
3146 tab_alloc_size * sizeof (*tab));
3148 tab[tab_cur_size++] = file;
3154 /* Slave routine for sources_info. Force line breaks at ,'s.
3155 NAME is the name to print and *FIRST is nonzero if this is the first
3156 name printed. Set *FIRST to zero. */
3159 output_source_filename (const char *name, int *first)
3161 /* Since a single source file can result in several partial symbol
3162 tables, we need to avoid printing it more than once. Note: if
3163 some of the psymtabs are read in and some are not, it gets
3164 printed both under "Source files for which symbols have been
3165 read" and "Source files for which symbols will be read in on
3166 demand". I consider this a reasonable way to deal with the
3167 situation. I'm not sure whether this can also happen for
3168 symtabs; it doesn't hurt to check. */
3170 /* Was NAME already seen? */
3171 if (filename_seen (name, 1, first))
3173 /* Yes; don't print it again. */
3176 /* No; print it and reset *FIRST. */
3183 printf_filtered (", ");
3187 fputs_filtered (name, gdb_stdout);
3190 /* A callback for map_partial_symbol_filenames. */
3193 output_partial_symbol_filename (const char *filename, const char *fullname,
3196 output_source_filename (fullname ? fullname : filename, data);
3200 sources_info (char *ignore, int from_tty)
3203 struct objfile *objfile;
3206 if (!have_full_symbols () && !have_partial_symbols ())
3208 error (_("No symbol table is loaded. Use the \"file\" command."));
3211 printf_filtered ("Source files for which symbols have been read in:\n\n");
3214 ALL_SYMTABS (objfile, s)
3216 const char *fullname = symtab_to_fullname (s);
3218 output_source_filename (fullname ? fullname : s->filename, &first);
3220 printf_filtered ("\n\n");
3222 printf_filtered ("Source files for which symbols "
3223 "will be read in on demand:\n\n");
3226 map_partial_symbol_filenames (output_partial_symbol_filename, &first,
3227 1 /*need_fullname*/);
3228 printf_filtered ("\n");
3232 file_matches (const char *file, char *files[], int nfiles)
3236 if (file != NULL && nfiles != 0)
3238 for (i = 0; i < nfiles; i++)
3240 if (filename_cmp (files[i], lbasename (file)) == 0)
3244 else if (nfiles == 0)
3249 /* Free any memory associated with a search. */
3252 free_search_symbols (struct symbol_search *symbols)
3254 struct symbol_search *p;
3255 struct symbol_search *next;
3257 for (p = symbols; p != NULL; p = next)
3265 do_free_search_symbols_cleanup (void *symbols)
3267 free_search_symbols (symbols);
3271 make_cleanup_free_search_symbols (struct symbol_search *symbols)
3273 return make_cleanup (do_free_search_symbols_cleanup, symbols);
3276 /* Helper function for sort_search_symbols and qsort. Can only
3277 sort symbols, not minimal symbols. */
3280 compare_search_syms (const void *sa, const void *sb)
3282 struct symbol_search **sym_a = (struct symbol_search **) sa;
3283 struct symbol_search **sym_b = (struct symbol_search **) sb;
3285 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
3286 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
3289 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3290 prevtail where it is, but update its next pointer to point to
3291 the first of the sorted symbols. */
3293 static struct symbol_search *
3294 sort_search_symbols (struct symbol_search *prevtail, int nfound)
3296 struct symbol_search **symbols, *symp, *old_next;
3299 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
3301 symp = prevtail->next;
3302 for (i = 0; i < nfound; i++)
3307 /* Generally NULL. */
3310 qsort (symbols, nfound, sizeof (struct symbol_search *),
3311 compare_search_syms);
3314 for (i = 0; i < nfound; i++)
3316 symp->next = symbols[i];
3319 symp->next = old_next;
3325 /* An object of this type is passed as the user_data to the
3326 expand_symtabs_matching method. */
3327 struct search_symbols_data
3332 /* It is true if PREG contains valid data, false otherwise. */
3333 unsigned preg_p : 1;
3337 /* A callback for expand_symtabs_matching. */
3340 search_symbols_file_matches (const char *filename, void *user_data)
3342 struct search_symbols_data *data = user_data;
3344 return file_matches (filename, data->files, data->nfiles);
3347 /* A callback for expand_symtabs_matching. */
3350 search_symbols_name_matches (const char *symname, void *user_data)
3352 struct search_symbols_data *data = user_data;
3354 return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0;
3357 /* Search the symbol table for matches to the regular expression REGEXP,
3358 returning the results in *MATCHES.
3360 Only symbols of KIND are searched:
3361 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3362 and constants (enums)
3363 FUNCTIONS_DOMAIN - search all functions
3364 TYPES_DOMAIN - search all type names
3365 ALL_DOMAIN - an internal error for this function
3367 free_search_symbols should be called when *MATCHES is no longer needed.
3369 The results are sorted locally; each symtab's global and static blocks are
3370 separately alphabetized. */
3373 search_symbols (char *regexp, enum search_domain kind,
3374 int nfiles, char *files[],
3375 struct symbol_search **matches)
3378 struct blockvector *bv;
3381 struct block_iterator iter;
3383 struct objfile *objfile;
3384 struct minimal_symbol *msymbol;
3386 static const enum minimal_symbol_type types[]
3387 = {mst_data, mst_text, mst_abs};
3388 static const enum minimal_symbol_type types2[]
3389 = {mst_bss, mst_file_text, mst_abs};
3390 static const enum minimal_symbol_type types3[]
3391 = {mst_file_data, mst_solib_trampoline, mst_abs};
3392 static const enum minimal_symbol_type types4[]
3393 = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
3394 enum minimal_symbol_type ourtype;
3395 enum minimal_symbol_type ourtype2;
3396 enum minimal_symbol_type ourtype3;
3397 enum minimal_symbol_type ourtype4;
3398 struct symbol_search *sr;
3399 struct symbol_search *psr;
3400 struct symbol_search *tail;
3401 struct search_symbols_data datum;
3403 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3404 CLEANUP_CHAIN is freed only in the case of an error. */
3405 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
3406 struct cleanup *retval_chain;
3408 gdb_assert (kind <= TYPES_DOMAIN);
3410 ourtype = types[kind];
3411 ourtype2 = types2[kind];
3412 ourtype3 = types3[kind];
3413 ourtype4 = types4[kind];
3415 sr = *matches = NULL;
3421 /* Make sure spacing is right for C++ operators.
3422 This is just a courtesy to make the matching less sensitive
3423 to how many spaces the user leaves between 'operator'
3424 and <TYPENAME> or <OPERATOR>. */
3426 char *opname = operator_chars (regexp, &opend);
3431 int fix = -1; /* -1 means ok; otherwise number of
3434 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3436 /* There should 1 space between 'operator' and 'TYPENAME'. */
3437 if (opname[-1] != ' ' || opname[-2] == ' ')
3442 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3443 if (opname[-1] == ' ')
3446 /* If wrong number of spaces, fix it. */
3449 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3451 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3456 errcode = regcomp (&datum.preg, regexp,
3457 REG_NOSUB | (case_sensitivity == case_sensitive_off
3461 char *err = get_regcomp_error (errcode, &datum.preg);
3463 make_cleanup (xfree, err);
3464 error (_("Invalid regexp (%s): %s"), err, regexp);
3467 make_regfree_cleanup (&datum.preg);
3470 /* Search through the partial symtabs *first* for all symbols
3471 matching the regexp. That way we don't have to reproduce all of
3472 the machinery below. */
3474 datum.nfiles = nfiles;
3475 datum.files = files;
3476 ALL_OBJFILES (objfile)
3479 objfile->sf->qf->expand_symtabs_matching (objfile,
3482 : search_symbols_file_matches),
3483 search_symbols_name_matches,
3488 retval_chain = old_chain;
3490 /* Here, we search through the minimal symbol tables for functions
3491 and variables that match, and force their symbols to be read.
3492 This is in particular necessary for demangled variable names,
3493 which are no longer put into the partial symbol tables.
3494 The symbol will then be found during the scan of symtabs below.
3496 For functions, find_pc_symtab should succeed if we have debug info
3497 for the function, for variables we have to call
3498 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3500 If the lookup fails, set found_misc so that we will rescan to print
3501 any matching symbols without debug info.
3502 We only search the objfile the msymbol came from, we no longer search
3503 all objfiles. In large programs (1000s of shared libs) searching all
3504 objfiles is not worth the pain. */
3506 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3508 ALL_MSYMBOLS (objfile, msymbol)
3512 if (msymbol->created_by_gdb)
3515 if (MSYMBOL_TYPE (msymbol) == ourtype
3516 || MSYMBOL_TYPE (msymbol) == ourtype2
3517 || MSYMBOL_TYPE (msymbol) == ourtype3
3518 || MSYMBOL_TYPE (msymbol) == ourtype4)
3521 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3524 /* Note: An important side-effect of these lookup functions
3525 is to expand the symbol table if msymbol is found, for the
3526 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3527 if (kind == FUNCTIONS_DOMAIN
3528 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL
3529 : (lookup_symbol_in_objfile_from_linkage_name
3530 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3538 ALL_PRIMARY_SYMTABS (objfile, s)
3540 bv = BLOCKVECTOR (s);
3541 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3543 struct symbol_search *prevtail = tail;
3546 b = BLOCKVECTOR_BLOCK (bv, i);
3547 ALL_BLOCK_SYMBOLS (b, iter, sym)
3549 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3553 if (file_matches (real_symtab->filename, files, nfiles)
3555 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0,
3557 && ((kind == VARIABLES_DOMAIN
3558 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3559 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
3560 && SYMBOL_CLASS (sym) != LOC_BLOCK
3561 /* LOC_CONST can be used for more than just enums,
3562 e.g., c++ static const members.
3563 We only want to skip enums here. */
3564 && !(SYMBOL_CLASS (sym) == LOC_CONST
3565 && TYPE_CODE (SYMBOL_TYPE (sym))
3567 || (kind == FUNCTIONS_DOMAIN
3568 && SYMBOL_CLASS (sym) == LOC_BLOCK)
3569 || (kind == TYPES_DOMAIN
3570 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
3573 psr = (struct symbol_search *)
3574 xmalloc (sizeof (struct symbol_search));
3576 psr->symtab = real_symtab;
3578 psr->msymbol = NULL;
3590 if (prevtail == NULL)
3592 struct symbol_search dummy;
3595 tail = sort_search_symbols (&dummy, nfound);
3598 make_cleanup_free_search_symbols (sr);
3601 tail = sort_search_symbols (prevtail, nfound);
3606 /* If there are no eyes, avoid all contact. I mean, if there are
3607 no debug symbols, then print directly from the msymbol_vector. */
3609 if (found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
3611 ALL_MSYMBOLS (objfile, msymbol)
3615 if (msymbol->created_by_gdb)
3618 if (MSYMBOL_TYPE (msymbol) == ourtype
3619 || MSYMBOL_TYPE (msymbol) == ourtype2
3620 || MSYMBOL_TYPE (msymbol) == ourtype3
3621 || MSYMBOL_TYPE (msymbol) == ourtype4)
3624 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3627 /* For functions we can do a quick check of whether the
3628 symbol might be found via find_pc_symtab. */
3629 if (kind != FUNCTIONS_DOMAIN
3630 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL)
3632 if (lookup_symbol_in_objfile_from_linkage_name
3633 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3637 psr = (struct symbol_search *)
3638 xmalloc (sizeof (struct symbol_search));
3640 psr->msymbol = msymbol;
3647 make_cleanup_free_search_symbols (sr);
3659 discard_cleanups (retval_chain);
3660 do_cleanups (old_chain);
3664 /* Helper function for symtab_symbol_info, this function uses
3665 the data returned from search_symbols() to print information
3666 regarding the match to gdb_stdout. */
3669 print_symbol_info (enum search_domain kind,
3670 struct symtab *s, struct symbol *sym,
3671 int block, char *last)
3673 if (last == NULL || filename_cmp (last, s->filename) != 0)
3675 fputs_filtered ("\nFile ", gdb_stdout);
3676 fputs_filtered (s->filename, gdb_stdout);
3677 fputs_filtered (":\n", gdb_stdout);
3680 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3681 printf_filtered ("static ");
3683 /* Typedef that is not a C++ class. */
3684 if (kind == TYPES_DOMAIN
3685 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3686 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3687 /* variable, func, or typedef-that-is-c++-class. */
3688 else if (kind < TYPES_DOMAIN
3689 || (kind == TYPES_DOMAIN
3690 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3692 type_print (SYMBOL_TYPE (sym),
3693 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3694 ? "" : SYMBOL_PRINT_NAME (sym)),
3697 printf_filtered (";\n");
3701 /* This help function for symtab_symbol_info() prints information
3702 for non-debugging symbols to gdb_stdout. */
3705 print_msymbol_info (struct minimal_symbol *msymbol)
3707 struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
3710 if (gdbarch_addr_bit (gdbarch) <= 32)
3711 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3712 & (CORE_ADDR) 0xffffffff,
3715 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3717 printf_filtered ("%s %s\n",
3718 tmp, SYMBOL_PRINT_NAME (msymbol));
3721 /* This is the guts of the commands "info functions", "info types", and
3722 "info variables". It calls search_symbols to find all matches and then
3723 print_[m]symbol_info to print out some useful information about the
3727 symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty)
3729 static const char * const classnames[] =
3730 {"variable", "function", "type"};
3731 struct symbol_search *symbols;
3732 struct symbol_search *p;
3733 struct cleanup *old_chain;
3734 char *last_filename = NULL;
3737 gdb_assert (kind <= TYPES_DOMAIN);
3739 /* Must make sure that if we're interrupted, symbols gets freed. */
3740 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3741 old_chain = make_cleanup_free_search_symbols (symbols);
3743 printf_filtered (regexp
3744 ? "All %ss matching regular expression \"%s\":\n"
3745 : "All defined %ss:\n",
3746 classnames[kind], regexp);
3748 for (p = symbols; p != NULL; p = p->next)
3752 if (p->msymbol != NULL)
3756 printf_filtered ("\nNon-debugging symbols:\n");
3759 print_msymbol_info (p->msymbol);
3763 print_symbol_info (kind,
3768 last_filename = p->symtab->filename;
3772 do_cleanups (old_chain);
3776 variables_info (char *regexp, int from_tty)
3778 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3782 functions_info (char *regexp, int from_tty)
3784 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3789 types_info (char *regexp, int from_tty)
3791 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3794 /* Breakpoint all functions matching regular expression. */
3797 rbreak_command_wrapper (char *regexp, int from_tty)
3799 rbreak_command (regexp, from_tty);
3802 /* A cleanup function that calls end_rbreak_breakpoints. */
3805 do_end_rbreak_breakpoints (void *ignore)
3807 end_rbreak_breakpoints ();
3811 rbreak_command (char *regexp, int from_tty)
3813 struct symbol_search *ss;
3814 struct symbol_search *p;
3815 struct cleanup *old_chain;
3816 char *string = NULL;
3818 char **files = NULL, *file_name;
3823 char *colon = strchr (regexp, ':');
3825 if (colon && *(colon + 1) != ':')
3829 colon_index = colon - regexp;
3830 file_name = alloca (colon_index + 1);
3831 memcpy (file_name, regexp, colon_index);
3832 file_name[colon_index--] = 0;
3833 while (isspace (file_name[colon_index]))
3834 file_name[colon_index--] = 0;
3838 while (isspace (*regexp)) regexp++;
3842 search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss);
3843 old_chain = make_cleanup_free_search_symbols (ss);
3844 make_cleanup (free_current_contents, &string);
3846 start_rbreak_breakpoints ();
3847 make_cleanup (do_end_rbreak_breakpoints, NULL);
3848 for (p = ss; p != NULL; p = p->next)
3850 if (p->msymbol == NULL)
3852 int newlen = (strlen (p->symtab->filename)
3853 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3858 string = xrealloc (string, newlen);
3861 strcpy (string, p->symtab->filename);
3862 strcat (string, ":'");
3863 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3864 strcat (string, "'");
3865 break_command (string, from_tty);
3866 print_symbol_info (FUNCTIONS_DOMAIN,
3870 p->symtab->filename);
3874 int newlen = (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) + 3);
3878 string = xrealloc (string, newlen);
3881 strcpy (string, "'");
3882 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3883 strcat (string, "'");
3885 break_command (string, from_tty);
3886 printf_filtered ("<function, no debug info> %s;\n",
3887 SYMBOL_PRINT_NAME (p->msymbol));
3891 do_cleanups (old_chain);
3895 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3897 Either sym_text[sym_text_len] != '(' and then we search for any
3898 symbol starting with SYM_TEXT text.
3900 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3901 be terminated at that point. Partial symbol tables do not have parameters
3905 compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
3907 int (*ncmp) (const char *, const char *, size_t);
3909 ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp);
3911 if (ncmp (name, sym_text, sym_text_len) != 0)
3914 if (sym_text[sym_text_len] == '(')
3916 /* User searches for `name(someth...'. Require NAME to be terminated.
3917 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3918 present but accept even parameters presence. In this case this
3919 function is in fact strcmp_iw but whitespace skipping is not supported
3920 for tab completion. */
3922 if (name[sym_text_len] != '\0' && name[sym_text_len] != '(')
3929 /* Free any memory associated with a completion list. */
3932 free_completion_list (VEC (char_ptr) **list_ptr)
3937 for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i)
3939 VEC_free (char_ptr, *list_ptr);
3942 /* Callback for make_cleanup. */
3945 do_free_completion_list (void *list)
3947 free_completion_list (list);
3950 /* Helper routine for make_symbol_completion_list. */
3952 static VEC (char_ptr) *return_val;
3954 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3955 completion_list_add_name \
3956 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3958 /* Test to see if the symbol specified by SYMNAME (which is already
3959 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3960 characters. If so, add it to the current completion list. */
3963 completion_list_add_name (const char *symname,
3964 const char *sym_text, int sym_text_len,
3965 const char *text, const char *word)
3969 /* Clip symbols that cannot match. */
3970 if (!compare_symbol_name (symname, sym_text, sym_text_len))
3973 /* We have a match for a completion, so add SYMNAME to the current list
3974 of matches. Note that the name is moved to freshly malloc'd space. */
3979 if (word == sym_text)
3981 new = xmalloc (strlen (symname) + 5);
3982 strcpy (new, symname);
3984 else if (word > sym_text)
3986 /* Return some portion of symname. */
3987 new = xmalloc (strlen (symname) + 5);
3988 strcpy (new, symname + (word - sym_text));
3992 /* Return some of SYM_TEXT plus symname. */
3993 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
3994 strncpy (new, word, sym_text - word);
3995 new[sym_text - word] = '\0';
3996 strcat (new, symname);
3999 VEC_safe_push (char_ptr, return_val, new);
4003 /* ObjC: In case we are completing on a selector, look as the msymbol
4004 again and feed all the selectors into the mill. */
4007 completion_list_objc_symbol (struct minimal_symbol *msymbol,
4008 const char *sym_text, int sym_text_len,
4009 const char *text, const char *word)
4011 static char *tmp = NULL;
4012 static unsigned int tmplen = 0;
4014 const char *method, *category, *selector;
4017 method = SYMBOL_NATURAL_NAME (msymbol);
4019 /* Is it a method? */
4020 if ((method[0] != '-') && (method[0] != '+'))
4023 if (sym_text[0] == '[')
4024 /* Complete on shortened method method. */
4025 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
4027 while ((strlen (method) + 1) >= tmplen)
4033 tmp = xrealloc (tmp, tmplen);
4035 selector = strchr (method, ' ');
4036 if (selector != NULL)
4039 category = strchr (method, '(');
4041 if ((category != NULL) && (selector != NULL))
4043 memcpy (tmp, method, (category - method));
4044 tmp[category - method] = ' ';
4045 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
4046 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4047 if (sym_text[0] == '[')
4048 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
4051 if (selector != NULL)
4053 /* Complete on selector only. */
4054 strcpy (tmp, selector);
4055 tmp2 = strchr (tmp, ']');
4059 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4063 /* Break the non-quoted text based on the characters which are in
4064 symbols. FIXME: This should probably be language-specific. */
4067 language_search_unquoted_string (char *text, char *p)
4069 for (; p > text; --p)
4071 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
4075 if ((current_language->la_language == language_objc))
4077 if (p[-1] == ':') /* Might be part of a method name. */
4079 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
4080 p -= 2; /* Beginning of a method name. */
4081 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
4082 { /* Might be part of a method name. */
4085 /* Seeing a ' ' or a '(' is not conclusive evidence
4086 that we are in the middle of a method name. However,
4087 finding "-[" or "+[" should be pretty un-ambiguous.
4088 Unfortunately we have to find it now to decide. */
4091 if (isalnum (t[-1]) || t[-1] == '_' ||
4092 t[-1] == ' ' || t[-1] == ':' ||
4093 t[-1] == '(' || t[-1] == ')')
4098 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
4099 p = t - 2; /* Method name detected. */
4100 /* Else we leave with p unchanged. */
4110 completion_list_add_fields (struct symbol *sym, char *sym_text,
4111 int sym_text_len, char *text, char *word)
4113 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4115 struct type *t = SYMBOL_TYPE (sym);
4116 enum type_code c = TYPE_CODE (t);
4119 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
4120 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
4121 if (TYPE_FIELD_NAME (t, j))
4122 completion_list_add_name (TYPE_FIELD_NAME (t, j),
4123 sym_text, sym_text_len, text, word);
4127 /* Type of the user_data argument passed to add_macro_name or
4128 expand_partial_symbol_name. The contents are simply whatever is
4129 needed by completion_list_add_name. */
4130 struct add_name_data
4138 /* A callback used with macro_for_each and macro_for_each_in_scope.
4139 This adds a macro's name to the current completion list. */
4142 add_macro_name (const char *name, const struct macro_definition *ignore,
4143 struct macro_source_file *ignore2, int ignore3,
4146 struct add_name_data *datum = (struct add_name_data *) user_data;
4148 completion_list_add_name ((char *) name,
4149 datum->sym_text, datum->sym_text_len,
4150 datum->text, datum->word);
4153 /* A callback for expand_partial_symbol_names. */
4156 expand_partial_symbol_name (const char *name, void *user_data)
4158 struct add_name_data *datum = (struct add_name_data *) user_data;
4160 return compare_symbol_name (name, datum->sym_text, datum->sym_text_len);
4164 default_make_symbol_completion_list_break_on (char *text, char *word,
4165 const char *break_on)
4167 /* Problem: All of the symbols have to be copied because readline
4168 frees them. I'm not going to worry about this; hopefully there
4169 won't be that many. */
4173 struct minimal_symbol *msymbol;
4174 struct objfile *objfile;
4176 const struct block *surrounding_static_block, *surrounding_global_block;
4177 struct block_iterator iter;
4178 /* The symbol we are completing on. Points in same buffer as text. */
4180 /* Length of sym_text. */
4182 struct add_name_data datum;
4183 struct cleanup *back_to;
4185 /* Now look for the symbol we are supposed to complete on. */
4189 char *quote_pos = NULL;
4191 /* First see if this is a quoted string. */
4193 for (p = text; *p != '\0'; ++p)
4195 if (quote_found != '\0')
4197 if (*p == quote_found)
4198 /* Found close quote. */
4200 else if (*p == '\\' && p[1] == quote_found)
4201 /* A backslash followed by the quote character
4202 doesn't end the string. */
4205 else if (*p == '\'' || *p == '"')
4211 if (quote_found == '\'')
4212 /* A string within single quotes can be a symbol, so complete on it. */
4213 sym_text = quote_pos + 1;
4214 else if (quote_found == '"')
4215 /* A double-quoted string is never a symbol, nor does it make sense
4216 to complete it any other way. */
4222 /* It is not a quoted string. Break it based on the characters
4223 which are in symbols. */
4226 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
4227 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
4236 sym_text_len = strlen (sym_text);
4238 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4240 if (current_language->la_language == language_cplus
4241 || current_language->la_language == language_java
4242 || current_language->la_language == language_fortran)
4244 /* These languages may have parameters entered by user but they are never
4245 present in the partial symbol tables. */
4247 const char *cs = memchr (sym_text, '(', sym_text_len);
4250 sym_text_len = cs - sym_text;
4252 gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
4255 back_to = make_cleanup (do_free_completion_list, &return_val);
4257 datum.sym_text = sym_text;
4258 datum.sym_text_len = sym_text_len;
4262 /* Look through the partial symtabs for all symbols which begin
4263 by matching SYM_TEXT. Expand all CUs that you find to the list.
4264 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4265 expand_partial_symbol_names (expand_partial_symbol_name, &datum);
4267 /* At this point scan through the misc symbol vectors and add each
4268 symbol you find to the list. Eventually we want to ignore
4269 anything that isn't a text symbol (everything else will be
4270 handled by the psymtab code above). */
4272 ALL_MSYMBOLS (objfile, msymbol)
4275 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
4277 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
4280 /* Search upwards from currently selected frame (so that we can
4281 complete on local vars). Also catch fields of types defined in
4282 this places which match our text string. Only complete on types
4283 visible from current context. */
4285 b = get_selected_block (0);
4286 surrounding_static_block = block_static_block (b);
4287 surrounding_global_block = block_global_block (b);
4288 if (surrounding_static_block != NULL)
4289 while (b != surrounding_static_block)
4293 ALL_BLOCK_SYMBOLS (b, iter, sym)
4295 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4297 completion_list_add_fields (sym, sym_text, sym_text_len, text,
4301 /* Stop when we encounter an enclosing function. Do not stop for
4302 non-inlined functions - the locals of the enclosing function
4303 are in scope for a nested function. */
4304 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
4306 b = BLOCK_SUPERBLOCK (b);
4309 /* Add fields from the file's types; symbols will be added below. */
4311 if (surrounding_static_block != NULL)
4312 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
4313 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4315 if (surrounding_global_block != NULL)
4316 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
4317 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4319 /* Go through the symtabs and check the externs and statics for
4320 symbols which match. */
4322 ALL_PRIMARY_SYMTABS (objfile, s)
4325 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4326 ALL_BLOCK_SYMBOLS (b, iter, sym)
4328 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4332 ALL_PRIMARY_SYMTABS (objfile, s)
4335 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4336 ALL_BLOCK_SYMBOLS (b, iter, sym)
4338 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4342 if (current_language->la_macro_expansion == macro_expansion_c)
4344 struct macro_scope *scope;
4346 /* Add any macros visible in the default scope. Note that this
4347 may yield the occasional wrong result, because an expression
4348 might be evaluated in a scope other than the default. For
4349 example, if the user types "break file:line if <TAB>", the
4350 resulting expression will be evaluated at "file:line" -- but
4351 at there does not seem to be a way to detect this at
4353 scope = default_macro_scope ();
4356 macro_for_each_in_scope (scope->file, scope->line,
4357 add_macro_name, &datum);
4361 /* User-defined macros are always visible. */
4362 macro_for_each (macro_user_macros, add_macro_name, &datum);
4365 discard_cleanups (back_to);
4366 return (return_val);
4370 default_make_symbol_completion_list (char *text, char *word)
4372 return default_make_symbol_completion_list_break_on (text, word, "");
4375 /* Return a vector of all symbols (regardless of class) which begin by
4376 matching TEXT. If the answer is no symbols, then the return value
4380 make_symbol_completion_list (char *text, char *word)
4382 return current_language->la_make_symbol_completion_list (text, word);
4385 /* Like make_symbol_completion_list, but suitable for use as a
4386 completion function. */
4389 make_symbol_completion_list_fn (struct cmd_list_element *ignore,
4390 char *text, char *word)
4392 return make_symbol_completion_list (text, word);
4395 /* Like make_symbol_completion_list, but returns a list of symbols
4396 defined in a source file FILE. */
4399 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
4404 struct block_iterator iter;
4405 /* The symbol we are completing on. Points in same buffer as text. */
4407 /* Length of sym_text. */
4410 /* Now look for the symbol we are supposed to complete on.
4411 FIXME: This should be language-specific. */
4415 char *quote_pos = NULL;
4417 /* First see if this is a quoted string. */
4419 for (p = text; *p != '\0'; ++p)
4421 if (quote_found != '\0')
4423 if (*p == quote_found)
4424 /* Found close quote. */
4426 else if (*p == '\\' && p[1] == quote_found)
4427 /* A backslash followed by the quote character
4428 doesn't end the string. */
4431 else if (*p == '\'' || *p == '"')
4437 if (quote_found == '\'')
4438 /* A string within single quotes can be a symbol, so complete on it. */
4439 sym_text = quote_pos + 1;
4440 else if (quote_found == '"')
4441 /* A double-quoted string is never a symbol, nor does it make sense
4442 to complete it any other way. */
4448 /* Not a quoted string. */
4449 sym_text = language_search_unquoted_string (text, p);
4453 sym_text_len = strlen (sym_text);
4457 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4459 s = lookup_symtab (srcfile);
4462 /* Maybe they typed the file with leading directories, while the
4463 symbol tables record only its basename. */
4464 const char *tail = lbasename (srcfile);
4467 s = lookup_symtab (tail);
4470 /* If we have no symtab for that file, return an empty list. */
4472 return (return_val);
4474 /* Go through this symtab and check the externs and statics for
4475 symbols which match. */
4477 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4478 ALL_BLOCK_SYMBOLS (b, iter, sym)
4480 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4483 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4484 ALL_BLOCK_SYMBOLS (b, iter, sym)
4486 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4489 return (return_val);
4492 /* A helper function for make_source_files_completion_list. It adds
4493 another file name to a list of possible completions, growing the
4494 list as necessary. */
4497 add_filename_to_list (const char *fname, char *text, char *word,
4498 VEC (char_ptr) **list)
4501 size_t fnlen = strlen (fname);
4505 /* Return exactly fname. */
4506 new = xmalloc (fnlen + 5);
4507 strcpy (new, fname);
4509 else if (word > text)
4511 /* Return some portion of fname. */
4512 new = xmalloc (fnlen + 5);
4513 strcpy (new, fname + (word - text));
4517 /* Return some of TEXT plus fname. */
4518 new = xmalloc (fnlen + (text - word) + 5);
4519 strncpy (new, word, text - word);
4520 new[text - word] = '\0';
4521 strcat (new, fname);
4523 VEC_safe_push (char_ptr, *list, new);
4527 not_interesting_fname (const char *fname)
4529 static const char *illegal_aliens[] = {
4530 "_globals_", /* inserted by coff_symtab_read */
4535 for (i = 0; illegal_aliens[i]; i++)
4537 if (filename_cmp (fname, illegal_aliens[i]) == 0)
4543 /* An object of this type is passed as the user_data argument to
4544 map_partial_symbol_filenames. */
4545 struct add_partial_filename_data
4551 VEC (char_ptr) **list;
4554 /* A callback for map_partial_symbol_filenames. */
4557 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
4560 struct add_partial_filename_data *data = user_data;
4562 if (not_interesting_fname (filename))
4564 if (!filename_seen (filename, 1, data->first)
4565 && filename_ncmp (filename, data->text, data->text_len) == 0)
4567 /* This file matches for a completion; add it to the
4568 current list of matches. */
4569 add_filename_to_list (filename, data->text, data->word, data->list);
4573 const char *base_name = lbasename (filename);
4575 if (base_name != filename
4576 && !filename_seen (base_name, 1, data->first)
4577 && filename_ncmp (base_name, data->text, data->text_len) == 0)
4578 add_filename_to_list (base_name, data->text, data->word, data->list);
4582 /* Return a vector of all source files whose names begin with matching
4583 TEXT. The file names are looked up in the symbol tables of this
4584 program. If the answer is no matchess, then the return value is
4588 make_source_files_completion_list (char *text, char *word)
4591 struct objfile *objfile;
4593 size_t text_len = strlen (text);
4594 VEC (char_ptr) *list = NULL;
4595 const char *base_name;
4596 struct add_partial_filename_data datum;
4597 struct cleanup *back_to;
4599 if (!have_full_symbols () && !have_partial_symbols ())
4602 back_to = make_cleanup (do_free_completion_list, &list);
4604 ALL_SYMTABS (objfile, s)
4606 if (not_interesting_fname (s->filename))
4608 if (!filename_seen (s->filename, 1, &first)
4609 && filename_ncmp (s->filename, text, text_len) == 0)
4611 /* This file matches for a completion; add it to the current
4613 add_filename_to_list (s->filename, text, word, &list);
4617 /* NOTE: We allow the user to type a base name when the
4618 debug info records leading directories, but not the other
4619 way around. This is what subroutines of breakpoint
4620 command do when they parse file names. */
4621 base_name = lbasename (s->filename);
4622 if (base_name != s->filename
4623 && !filename_seen (base_name, 1, &first)
4624 && filename_ncmp (base_name, text, text_len) == 0)
4625 add_filename_to_list (base_name, text, word, &list);
4629 datum.first = &first;
4632 datum.text_len = text_len;
4634 map_partial_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
4635 0 /*need_fullname*/);
4636 discard_cleanups (back_to);
4641 /* Determine if PC is in the prologue of a function. The prologue is the area
4642 between the first instruction of a function, and the first executable line.
4643 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4645 If non-zero, func_start is where we think the prologue starts, possibly
4646 by previous examination of symbol table information. */
4649 in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
4651 struct symtab_and_line sal;
4652 CORE_ADDR func_addr, func_end;
4654 /* We have several sources of information we can consult to figure
4656 - Compilers usually emit line number info that marks the prologue
4657 as its own "source line". So the ending address of that "line"
4658 is the end of the prologue. If available, this is the most
4660 - The minimal symbols and partial symbols, which can usually tell
4661 us the starting and ending addresses of a function.
4662 - If we know the function's start address, we can call the
4663 architecture-defined gdbarch_skip_prologue function to analyze the
4664 instruction stream and guess where the prologue ends.
4665 - Our `func_start' argument; if non-zero, this is the caller's
4666 best guess as to the function's entry point. At the time of
4667 this writing, handle_inferior_event doesn't get this right, so
4668 it should be our last resort. */
4670 /* Consult the partial symbol table, to find which function
4672 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4674 CORE_ADDR prologue_end;
4676 /* We don't even have minsym information, so fall back to using
4677 func_start, if given. */
4679 return 1; /* We *might* be in a prologue. */
4681 prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
4683 return func_start <= pc && pc < prologue_end;
4686 /* If we have line number information for the function, that's
4687 usually pretty reliable. */
4688 sal = find_pc_line (func_addr, 0);
4690 /* Now sal describes the source line at the function's entry point,
4691 which (by convention) is the prologue. The end of that "line",
4692 sal.end, is the end of the prologue.
4694 Note that, for functions whose source code is all on a single
4695 line, the line number information doesn't always end up this way.
4696 So we must verify that our purported end-of-prologue address is
4697 *within* the function, not at its start or end. */
4699 || sal.end <= func_addr
4700 || func_end <= sal.end)
4702 /* We don't have any good line number info, so use the minsym
4703 information, together with the architecture-specific prologue
4705 CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
4707 return func_addr <= pc && pc < prologue_end;
4710 /* We have line number info, and it looks good. */
4711 return func_addr <= pc && pc < sal.end;
4714 /* Given PC at the function's start address, attempt to find the
4715 prologue end using SAL information. Return zero if the skip fails.
4717 A non-optimized prologue traditionally has one SAL for the function
4718 and a second for the function body. A single line function has
4719 them both pointing at the same line.
4721 An optimized prologue is similar but the prologue may contain
4722 instructions (SALs) from the instruction body. Need to skip those
4723 while not getting into the function body.
4725 The functions end point and an increasing SAL line are used as
4726 indicators of the prologue's endpoint.
4728 This code is based on the function refine_prologue_limit
4732 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
4734 struct symtab_and_line prologue_sal;
4739 /* Get an initial range for the function. */
4740 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4741 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
4743 prologue_sal = find_pc_line (start_pc, 0);
4744 if (prologue_sal.line != 0)
4746 /* For languages other than assembly, treat two consecutive line
4747 entries at the same address as a zero-instruction prologue.
4748 The GNU assembler emits separate line notes for each instruction
4749 in a multi-instruction macro, but compilers generally will not
4751 if (prologue_sal.symtab->language != language_asm)
4753 struct linetable *linetable = LINETABLE (prologue_sal.symtab);
4756 /* Skip any earlier lines, and any end-of-sequence marker
4757 from a previous function. */
4758 while (linetable->item[idx].pc != prologue_sal.pc
4759 || linetable->item[idx].line == 0)
4762 if (idx+1 < linetable->nitems
4763 && linetable->item[idx+1].line != 0
4764 && linetable->item[idx+1].pc == start_pc)
4768 /* If there is only one sal that covers the entire function,
4769 then it is probably a single line function, like
4771 if (prologue_sal.end >= end_pc)
4774 while (prologue_sal.end < end_pc)
4776 struct symtab_and_line sal;
4778 sal = find_pc_line (prologue_sal.end, 0);
4781 /* Assume that a consecutive SAL for the same (or larger)
4782 line mark the prologue -> body transition. */
4783 if (sal.line >= prologue_sal.line)
4786 /* The line number is smaller. Check that it's from the
4787 same function, not something inlined. If it's inlined,
4788 then there is no point comparing the line numbers. */
4789 bl = block_for_pc (prologue_sal.end);
4792 if (block_inlined_p (bl))
4794 if (BLOCK_FUNCTION (bl))
4799 bl = BLOCK_SUPERBLOCK (bl);
4804 /* The case in which compiler's optimizer/scheduler has
4805 moved instructions into the prologue. We look ahead in
4806 the function looking for address ranges whose
4807 corresponding line number is less the first one that we
4808 found for the function. This is more conservative then
4809 refine_prologue_limit which scans a large number of SALs
4810 looking for any in the prologue. */
4815 if (prologue_sal.end < end_pc)
4816 /* Return the end of this line, or zero if we could not find a
4818 return prologue_sal.end;
4820 /* Don't return END_PC, which is past the end of the function. */
4821 return prologue_sal.pc;
4824 struct symtabs_and_lines
4825 decode_line_spec (char *string, int flags)
4827 struct symtabs_and_lines sals;
4828 struct symtab_and_line cursal;
4831 error (_("Empty line specification."));
4833 /* We use whatever is set as the current source line. We do not try
4834 and get a default or it will recursively call us! */
4835 cursal = get_current_source_symtab_and_line ();
4837 sals = decode_line_1 (&string, flags,
4838 cursal.symtab, cursal.line);
4841 error (_("Junk at end of line specification: %s"), string);
4846 static char *name_of_main;
4847 enum language language_of_main = language_unknown;
4850 set_main_name (const char *name)
4852 if (name_of_main != NULL)
4854 xfree (name_of_main);
4855 name_of_main = NULL;
4856 language_of_main = language_unknown;
4860 name_of_main = xstrdup (name);
4861 language_of_main = language_unknown;
4865 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4869 find_main_name (void)
4871 const char *new_main_name;
4873 /* Try to see if the main procedure is in Ada. */
4874 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4875 be to add a new method in the language vector, and call this
4876 method for each language until one of them returns a non-empty
4877 name. This would allow us to remove this hard-coded call to
4878 an Ada function. It is not clear that this is a better approach
4879 at this point, because all methods need to be written in a way
4880 such that false positives never be returned. For instance, it is
4881 important that a method does not return a wrong name for the main
4882 procedure if the main procedure is actually written in a different
4883 language. It is easy to guaranty this with Ada, since we use a
4884 special symbol generated only when the main in Ada to find the name
4885 of the main procedure. It is difficult however to see how this can
4886 be guarantied for languages such as C, for instance. This suggests
4887 that order of call for these methods becomes important, which means
4888 a more complicated approach. */
4889 new_main_name = ada_main_name ();
4890 if (new_main_name != NULL)
4892 set_main_name (new_main_name);
4896 new_main_name = go_main_name ();
4897 if (new_main_name != NULL)
4899 set_main_name (new_main_name);
4903 new_main_name = pascal_main_name ();
4904 if (new_main_name != NULL)
4906 set_main_name (new_main_name);
4910 /* The languages above didn't identify the name of the main procedure.
4911 Fallback to "main". */
4912 set_main_name ("main");
4918 if (name_of_main == NULL)
4921 return name_of_main;
4924 /* Handle ``executable_changed'' events for the symtab module. */
4927 symtab_observer_executable_changed (void)
4929 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4930 set_main_name (NULL);
4933 /* Return 1 if the supplied producer string matches the ARM RealView
4934 compiler (armcc). */
4937 producer_is_realview (const char *producer)
4939 static const char *const arm_idents[] = {
4940 "ARM C Compiler, ADS",
4941 "Thumb C Compiler, ADS",
4942 "ARM C++ Compiler, ADS",
4943 "Thumb C++ Compiler, ADS",
4944 "ARM/Thumb C/C++ Compiler, RVCT",
4945 "ARM C/C++ Compiler, RVCT"
4949 if (producer == NULL)
4952 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
4953 if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0)
4960 _initialize_symtab (void)
4962 add_info ("variables", variables_info, _("\
4963 All global and static variable names, or those matching REGEXP."));
4965 add_com ("whereis", class_info, variables_info, _("\
4966 All global and static variable names, or those matching REGEXP."));
4968 add_info ("functions", functions_info,
4969 _("All function names, or those matching REGEXP."));
4971 /* FIXME: This command has at least the following problems:
4972 1. It prints builtin types (in a very strange and confusing fashion).
4973 2. It doesn't print right, e.g. with
4974 typedef struct foo *FOO
4975 type_print prints "FOO" when we want to make it (in this situation)
4976 print "struct foo *".
4977 I also think "ptype" or "whatis" is more likely to be useful (but if
4978 there is much disagreement "info types" can be fixed). */
4979 add_info ("types", types_info,
4980 _("All type names, or those matching REGEXP."));
4982 add_info ("sources", sources_info,
4983 _("Source files in the program."));
4985 add_com ("rbreak", class_breakpoint, rbreak_command,
4986 _("Set a breakpoint for all functions matching REGEXP."));
4990 add_com ("lf", class_info, sources_info,
4991 _("Source files in the program"));
4992 add_com ("lg", class_info, variables_info, _("\
4993 All global and static variable names, or those matching REGEXP."));
4996 add_setshow_enum_cmd ("multiple-symbols", no_class,
4997 multiple_symbols_modes, &multiple_symbols_mode,
4999 Set the debugger behavior when more than one symbol are possible matches\n\
5000 in an expression."), _("\
5001 Show how the debugger handles ambiguities in expressions."), _("\
5002 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5003 NULL, NULL, &setlist, &showlist);
5005 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
5006 &basenames_may_differ, _("\
5007 Set whether a source file may have multiple base names."), _("\
5008 Show whether a source file may have multiple base names."), _("\
5009 (A \"base name\" is the name of a file with the directory part removed.\n\
5010 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5011 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5012 before comparing them. Canonicalization is an expensive operation,\n\
5013 but it allows the same file be known by more than one base name.\n\
5014 If not set (the default), all source files are assumed to have just\n\
5015 one base name, and gdb will do file name comparisons more efficiently."),
5017 &setlist, &showlist);
5019 add_setshow_boolean_cmd ("symtab-create", no_class, &symtab_create_debug,
5020 _("Set debugging of symbol table creation."),
5021 _("Show debugging of symbol table creation."), _("\
5022 When enabled, debugging messages are printed when building symbol tables."),
5025 &setdebuglist, &showdebuglist);
5027 observer_attach_executable_changed (symtab_observer_executable_changed);