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 /* Non-zero if a file may be known by two different basenames.
113 This is the uncommon case, and significantly slows down gdb.
114 Default set to "off" to not slow down the common case. */
115 int basenames_may_differ = 0;
117 /* Allow the user to configure the debugger behavior with respect
118 to multiple-choice menus when more than one symbol matches during
121 const char multiple_symbols_ask[] = "ask";
122 const char multiple_symbols_all[] = "all";
123 const char multiple_symbols_cancel[] = "cancel";
124 static const char *const multiple_symbols_modes[] =
126 multiple_symbols_ask,
127 multiple_symbols_all,
128 multiple_symbols_cancel,
131 static const char *multiple_symbols_mode = multiple_symbols_all;
133 /* Read-only accessor to AUTO_SELECT_MODE. */
136 multiple_symbols_select_mode (void)
138 return multiple_symbols_mode;
141 /* Block in which the most recently searched-for symbol was found.
142 Might be better to make this a parameter to lookup_symbol and
145 const struct block *block_found;
147 /* See whether FILENAME matches SEARCH_NAME using the rule that we
148 advertise to the user. (The manual's description of linespecs
149 describes what we advertise). SEARCH_LEN is the length of
150 SEARCH_NAME. We assume that SEARCH_NAME is a relative path.
151 Returns true if they match, false otherwise. */
154 compare_filenames_for_search (const char *filename, const char *search_name,
157 int len = strlen (filename);
159 if (len < search_len)
162 /* The tail of FILENAME must match. */
163 if (FILENAME_CMP (filename + len - search_len, search_name) != 0)
166 /* Either the names must completely match, or the character
167 preceding the trailing SEARCH_NAME segment of FILENAME must be a
168 directory separator. */
169 return (len == search_len
170 || IS_DIR_SEPARATOR (filename[len - search_len - 1])
171 || (HAS_DRIVE_SPEC (filename)
172 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
175 /* Check for a symtab of a specific name by searching some symtabs.
176 This is a helper function for callbacks of iterate_over_symtabs.
178 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
179 are identical to the `map_symtabs_matching_filename' method of
180 quick_symbol_functions.
182 FIRST and AFTER_LAST indicate the range of symtabs to search.
183 AFTER_LAST is one past the last symtab to search; NULL means to
184 search until the end of the list. */
187 iterate_over_some_symtabs (const char *name,
188 const char *full_path,
189 const char *real_path,
190 int (*callback) (struct symtab *symtab,
193 struct symtab *first,
194 struct symtab *after_last)
196 struct symtab *s = NULL;
197 const char* base_name = lbasename (name);
198 int name_len = strlen (name);
199 int is_abs = IS_ABSOLUTE_PATH (name);
201 for (s = first; s != NULL && s != after_last; s = s->next)
203 /* Exact match is always ok. */
204 if (FILENAME_CMP (name, s->filename) == 0)
206 if (callback (s, data))
210 if (!is_abs && compare_filenames_for_search (s->filename, name, name_len))
212 if (callback (s, data))
216 /* Before we invoke realpath, which can get expensive when many
217 files are involved, do a quick comparison of the basenames. */
218 if (! basenames_may_differ
219 && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
222 /* If the user gave us an absolute path, try to find the file in
223 this symtab and use its absolute path. */
225 if (full_path != NULL)
227 const char *fp = symtab_to_fullname (s);
229 if (fp != NULL && FILENAME_CMP (full_path, fp) == 0)
231 if (callback (s, data))
235 if (fp != NULL && !is_abs && compare_filenames_for_search (fp, name,
238 if (callback (s, data))
243 if (real_path != NULL)
245 char *fullname = symtab_to_fullname (s);
247 if (fullname != NULL)
249 char *rp = gdb_realpath (fullname);
251 make_cleanup (xfree, rp);
252 if (FILENAME_CMP (real_path, rp) == 0)
254 if (callback (s, data))
258 if (!is_abs && compare_filenames_for_search (rp, name, name_len))
260 if (callback (s, data))
270 /* Check for a symtab of a specific name; first in symtabs, then in
271 psymtabs. *If* there is no '/' in the name, a match after a '/'
272 in the symtab filename will also work.
274 Calls CALLBACK with each symtab that is found and with the supplied
275 DATA. If CALLBACK returns true, the search stops. */
278 iterate_over_symtabs (const char *name,
279 int (*callback) (struct symtab *symtab,
283 struct symtab *s = NULL;
284 struct objfile *objfile;
285 char *real_path = NULL;
286 char *full_path = NULL;
287 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
289 /* Here we are interested in canonicalizing an absolute path, not
290 absolutizing a relative path. */
291 if (IS_ABSOLUTE_PATH (name))
293 full_path = xfullpath (name);
294 make_cleanup (xfree, full_path);
295 real_path = gdb_realpath (name);
296 make_cleanup (xfree, real_path);
299 ALL_OBJFILES (objfile)
301 if (iterate_over_some_symtabs (name, full_path, real_path, callback, data,
302 objfile->symtabs, NULL))
304 do_cleanups (cleanups);
309 /* Same search rules as above apply here, but now we look thru the
312 ALL_OBJFILES (objfile)
315 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
322 do_cleanups (cleanups);
327 do_cleanups (cleanups);
330 /* The callback function used by lookup_symtab. */
333 lookup_symtab_callback (struct symtab *symtab, void *data)
335 struct symtab **result_ptr = data;
337 *result_ptr = symtab;
341 /* A wrapper for iterate_over_symtabs that returns the first matching
345 lookup_symtab (const char *name)
347 struct symtab *result = NULL;
349 iterate_over_symtabs (name, lookup_symtab_callback, &result);
354 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
355 full method name, which consist of the class name (from T), the unadorned
356 method name from METHOD_ID, and the signature for the specific overload,
357 specified by SIGNATURE_ID. Note that this function is g++ specific. */
360 gdb_mangle_name (struct type *type, int method_id, int signature_id)
362 int mangled_name_len;
364 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
365 struct fn_field *method = &f[signature_id];
366 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
367 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
368 const char *newname = type_name_no_tag (type);
370 /* Does the form of physname indicate that it is the full mangled name
371 of a constructor (not just the args)? */
372 int is_full_physname_constructor;
375 int is_destructor = is_destructor_name (physname);
376 /* Need a new type prefix. */
377 char *const_prefix = method->is_const ? "C" : "";
378 char *volatile_prefix = method->is_volatile ? "V" : "";
380 int len = (newname == NULL ? 0 : strlen (newname));
382 /* Nothing to do if physname already contains a fully mangled v3 abi name
383 or an operator name. */
384 if ((physname[0] == '_' && physname[1] == 'Z')
385 || is_operator_name (field_name))
386 return xstrdup (physname);
388 is_full_physname_constructor = is_constructor_name (physname);
390 is_constructor = is_full_physname_constructor
391 || (newname && strcmp (field_name, newname) == 0);
394 is_destructor = (strncmp (physname, "__dt", 4) == 0);
396 if (is_destructor || is_full_physname_constructor)
398 mangled_name = (char *) xmalloc (strlen (physname) + 1);
399 strcpy (mangled_name, physname);
405 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
407 else if (physname[0] == 't' || physname[0] == 'Q')
409 /* The physname for template and qualified methods already includes
411 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
417 sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
419 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
420 + strlen (buf) + len + strlen (physname) + 1);
422 mangled_name = (char *) xmalloc (mangled_name_len);
424 mangled_name[0] = '\0';
426 strcpy (mangled_name, field_name);
428 strcat (mangled_name, buf);
429 /* If the class doesn't have a name, i.e. newname NULL, then we just
430 mangle it using 0 for the length of the class. Thus it gets mangled
431 as something starting with `::' rather than `classname::'. */
433 strcat (mangled_name, newname);
435 strcat (mangled_name, physname);
436 return (mangled_name);
439 /* Initialize the cplus_specific structure. 'cplus_specific' should
440 only be allocated for use with cplus symbols. */
443 symbol_init_cplus_specific (struct general_symbol_info *gsymbol,
444 struct objfile *objfile)
446 /* A language_specific structure should not have been previously
448 gdb_assert (gsymbol->language_specific.cplus_specific == NULL);
449 gdb_assert (objfile != NULL);
451 gsymbol->language_specific.cplus_specific =
452 OBSTACK_ZALLOC (&objfile->objfile_obstack, struct cplus_specific);
455 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
456 correctly allocated. For C++ symbols a cplus_specific struct is
457 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
458 OBJFILE can be NULL. */
461 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
463 struct objfile *objfile)
465 if (gsymbol->language == language_cplus)
467 if (gsymbol->language_specific.cplus_specific == NULL)
468 symbol_init_cplus_specific (gsymbol, objfile);
470 gsymbol->language_specific.cplus_specific->demangled_name = name;
473 gsymbol->language_specific.mangled_lang.demangled_name = name;
476 /* Return the demangled name of GSYMBOL. */
479 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
481 if (gsymbol->language == language_cplus)
483 if (gsymbol->language_specific.cplus_specific != NULL)
484 return gsymbol->language_specific.cplus_specific->demangled_name;
489 return gsymbol->language_specific.mangled_lang.demangled_name;
493 /* Initialize the language dependent portion of a symbol
494 depending upon the language for the symbol. */
497 symbol_set_language (struct general_symbol_info *gsymbol,
498 enum language language)
500 gsymbol->language = language;
501 if (gsymbol->language == language_d
502 || gsymbol->language == language_go
503 || gsymbol->language == language_java
504 || gsymbol->language == language_objc
505 || gsymbol->language == language_fortran)
507 symbol_set_demangled_name (gsymbol, NULL, NULL);
509 else if (gsymbol->language == language_cplus)
510 gsymbol->language_specific.cplus_specific = NULL;
513 memset (&gsymbol->language_specific, 0,
514 sizeof (gsymbol->language_specific));
518 /* Functions to initialize a symbol's mangled name. */
520 /* Objects of this type are stored in the demangled name hash table. */
521 struct demangled_name_entry
527 /* Hash function for the demangled name hash. */
530 hash_demangled_name_entry (const void *data)
532 const struct demangled_name_entry *e = data;
534 return htab_hash_string (e->mangled);
537 /* Equality function for the demangled name hash. */
540 eq_demangled_name_entry (const void *a, const void *b)
542 const struct demangled_name_entry *da = a;
543 const struct demangled_name_entry *db = b;
545 return strcmp (da->mangled, db->mangled) == 0;
548 /* Create the hash table used for demangled names. Each hash entry is
549 a pair of strings; one for the mangled name and one for the demangled
550 name. The entry is hashed via just the mangled name. */
553 create_demangled_names_hash (struct objfile *objfile)
555 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
556 The hash table code will round this up to the next prime number.
557 Choosing a much larger table size wastes memory, and saves only about
558 1% in symbol reading. */
560 objfile->demangled_names_hash = htab_create_alloc
561 (256, hash_demangled_name_entry, eq_demangled_name_entry,
562 NULL, xcalloc, xfree);
565 /* Try to determine the demangled name for a symbol, based on the
566 language of that symbol. If the language is set to language_auto,
567 it will attempt to find any demangling algorithm that works and
568 then set the language appropriately. The returned name is allocated
569 by the demangler and should be xfree'd. */
572 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
575 char *demangled = NULL;
577 if (gsymbol->language == language_unknown)
578 gsymbol->language = language_auto;
580 if (gsymbol->language == language_objc
581 || gsymbol->language == language_auto)
584 objc_demangle (mangled, 0);
585 if (demangled != NULL)
587 gsymbol->language = language_objc;
591 if (gsymbol->language == language_cplus
592 || gsymbol->language == language_auto)
595 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
596 if (demangled != NULL)
598 gsymbol->language = language_cplus;
602 if (gsymbol->language == language_java)
605 cplus_demangle (mangled,
606 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
607 if (demangled != NULL)
609 gsymbol->language = language_java;
613 if (gsymbol->language == language_d
614 || gsymbol->language == language_auto)
616 demangled = d_demangle(mangled, 0);
617 if (demangled != NULL)
619 gsymbol->language = language_d;
623 /* FIXME(dje): Continually adding languages here is clumsy.
624 Better to just call la_demangle if !auto, and if auto then call
625 a utility routine that tries successive languages in turn and reports
626 which one it finds. I realize the la_demangle options may be different
627 for different languages but there's already a FIXME for that. */
628 if (gsymbol->language == language_go
629 || gsymbol->language == language_auto)
631 demangled = go_demangle (mangled, 0);
632 if (demangled != NULL)
634 gsymbol->language = language_go;
639 /* We could support `gsymbol->language == language_fortran' here to provide
640 module namespaces also for inferiors with only minimal symbol table (ELF
641 symbols). Just the mangling standard is not standardized across compilers
642 and there is no DW_AT_producer available for inferiors with only the ELF
643 symbols to check the mangling kind. */
647 /* Set both the mangled and demangled (if any) names for GSYMBOL based
648 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
649 objfile's obstack; but if COPY_NAME is 0 and if NAME is
650 NUL-terminated, then this function assumes that NAME is already
651 correctly saved (either permanently or with a lifetime tied to the
652 objfile), and it will not be copied.
654 The hash table corresponding to OBJFILE is used, and the memory
655 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
656 so the pointer can be discarded after calling this function. */
658 /* We have to be careful when dealing with Java names: when we run
659 into a Java minimal symbol, we don't know it's a Java symbol, so it
660 gets demangled as a C++ name. This is unfortunate, but there's not
661 much we can do about it: but when demangling partial symbols and
662 regular symbols, we'd better not reuse the wrong demangled name.
663 (See PR gdb/1039.) We solve this by putting a distinctive prefix
664 on Java names when storing them in the hash table. */
666 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
667 don't mind the Java prefix so much: different languages have
668 different demangling requirements, so it's only natural that we
669 need to keep language data around in our demangling cache. But
670 it's not good that the minimal symbol has the wrong demangled name.
671 Unfortunately, I can't think of any easy solution to that
674 #define JAVA_PREFIX "##JAVA$$"
675 #define JAVA_PREFIX_LEN 8
678 symbol_set_names (struct general_symbol_info *gsymbol,
679 const char *linkage_name, int len, int copy_name,
680 struct objfile *objfile)
682 struct demangled_name_entry **slot;
683 /* A 0-terminated copy of the linkage name. */
684 const char *linkage_name_copy;
685 /* A copy of the linkage name that might have a special Java prefix
686 added to it, for use when looking names up in the hash table. */
687 const char *lookup_name;
688 /* The length of lookup_name. */
690 struct demangled_name_entry entry;
692 if (gsymbol->language == language_ada)
694 /* In Ada, we do the symbol lookups using the mangled name, so
695 we can save some space by not storing the demangled name.
697 As a side note, we have also observed some overlap between
698 the C++ mangling and Ada mangling, similarly to what has
699 been observed with Java. Because we don't store the demangled
700 name with the symbol, we don't need to use the same trick
703 gsymbol->name = linkage_name;
706 char *name = obstack_alloc (&objfile->objfile_obstack, len + 1);
708 memcpy (name, linkage_name, len);
710 gsymbol->name = name;
712 symbol_set_demangled_name (gsymbol, NULL, NULL);
717 if (objfile->demangled_names_hash == NULL)
718 create_demangled_names_hash (objfile);
720 /* The stabs reader generally provides names that are not
721 NUL-terminated; most of the other readers don't do this, so we
722 can just use the given copy, unless we're in the Java case. */
723 if (gsymbol->language == language_java)
727 lookup_len = len + JAVA_PREFIX_LEN;
728 alloc_name = alloca (lookup_len + 1);
729 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
730 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
731 alloc_name[lookup_len] = '\0';
733 lookup_name = alloc_name;
734 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
736 else if (linkage_name[len] != '\0')
741 alloc_name = alloca (lookup_len + 1);
742 memcpy (alloc_name, linkage_name, len);
743 alloc_name[lookup_len] = '\0';
745 lookup_name = alloc_name;
746 linkage_name_copy = alloc_name;
751 lookup_name = linkage_name;
752 linkage_name_copy = linkage_name;
755 entry.mangled = (char *) lookup_name;
756 slot = ((struct demangled_name_entry **)
757 htab_find_slot (objfile->demangled_names_hash,
760 /* If this name is not in the hash table, add it. */
762 /* A C version of the symbol may have already snuck into the table.
763 This happens to, e.g., main.init (__go_init_main). Cope. */
764 || (gsymbol->language == language_go
765 && (*slot)->demangled[0] == '\0'))
767 char *demangled_name = symbol_find_demangled_name (gsymbol,
769 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
771 /* Suppose we have demangled_name==NULL, copy_name==0, and
772 lookup_name==linkage_name. In this case, we already have the
773 mangled name saved, and we don't have a demangled name. So,
774 you might think we could save a little space by not recording
775 this in the hash table at all.
777 It turns out that it is actually important to still save such
778 an entry in the hash table, because storing this name gives
779 us better bcache hit rates for partial symbols. */
780 if (!copy_name && lookup_name == linkage_name)
782 *slot = obstack_alloc (&objfile->objfile_obstack,
783 offsetof (struct demangled_name_entry,
785 + demangled_len + 1);
786 (*slot)->mangled = (char *) lookup_name;
790 /* If we must copy the mangled name, put it directly after
791 the demangled name so we can have a single
793 *slot = obstack_alloc (&objfile->objfile_obstack,
794 offsetof (struct demangled_name_entry,
796 + lookup_len + demangled_len + 2);
797 (*slot)->mangled = &((*slot)->demangled[demangled_len + 1]);
798 strcpy ((*slot)->mangled, lookup_name);
801 if (demangled_name != NULL)
803 strcpy ((*slot)->demangled, demangled_name);
804 xfree (demangled_name);
807 (*slot)->demangled[0] = '\0';
810 gsymbol->name = (*slot)->mangled + lookup_len - len;
811 if ((*slot)->demangled[0] != '\0')
812 symbol_set_demangled_name (gsymbol, (*slot)->demangled, objfile);
814 symbol_set_demangled_name (gsymbol, NULL, objfile);
817 /* Return the source code name of a symbol. In languages where
818 demangling is necessary, this is the demangled name. */
821 symbol_natural_name (const struct general_symbol_info *gsymbol)
823 switch (gsymbol->language)
830 case language_fortran:
831 if (symbol_get_demangled_name (gsymbol) != NULL)
832 return symbol_get_demangled_name (gsymbol);
835 if (symbol_get_demangled_name (gsymbol) != NULL)
836 return symbol_get_demangled_name (gsymbol);
838 return ada_decode_symbol (gsymbol);
843 return gsymbol->name;
846 /* Return the demangled name for a symbol based on the language for
847 that symbol. If no demangled name exists, return NULL. */
850 symbol_demangled_name (const struct general_symbol_info *gsymbol)
852 const char *dem_name = NULL;
854 switch (gsymbol->language)
861 case language_fortran:
862 dem_name = symbol_get_demangled_name (gsymbol);
865 dem_name = symbol_get_demangled_name (gsymbol);
866 if (dem_name == NULL)
867 dem_name = ada_decode_symbol (gsymbol);
875 /* Return the search name of a symbol---generally the demangled or
876 linkage name of the symbol, depending on how it will be searched for.
877 If there is no distinct demangled name, then returns the same value
878 (same pointer) as SYMBOL_LINKAGE_NAME. */
881 symbol_search_name (const struct general_symbol_info *gsymbol)
883 if (gsymbol->language == language_ada)
884 return gsymbol->name;
886 return symbol_natural_name (gsymbol);
889 /* Initialize the structure fields to zero values. */
892 init_sal (struct symtab_and_line *sal)
900 sal->explicit_pc = 0;
901 sal->explicit_line = 0;
906 /* Return 1 if the two sections are the same, or if they could
907 plausibly be copies of each other, one in an original object
908 file and another in a separated debug file. */
911 matching_obj_sections (struct obj_section *obj_first,
912 struct obj_section *obj_second)
914 asection *first = obj_first? obj_first->the_bfd_section : NULL;
915 asection *second = obj_second? obj_second->the_bfd_section : NULL;
918 /* If they're the same section, then they match. */
922 /* If either is NULL, give up. */
923 if (first == NULL || second == NULL)
926 /* This doesn't apply to absolute symbols. */
927 if (first->owner == NULL || second->owner == NULL)
930 /* If they're in the same object file, they must be different sections. */
931 if (first->owner == second->owner)
934 /* Check whether the two sections are potentially corresponding. They must
935 have the same size, address, and name. We can't compare section indexes,
936 which would be more reliable, because some sections may have been
938 if (bfd_get_section_size (first) != bfd_get_section_size (second))
941 /* In-memory addresses may start at a different offset, relativize them. */
942 if (bfd_get_section_vma (first->owner, first)
943 - bfd_get_start_address (first->owner)
944 != bfd_get_section_vma (second->owner, second)
945 - bfd_get_start_address (second->owner))
948 if (bfd_get_section_name (first->owner, first) == NULL
949 || bfd_get_section_name (second->owner, second) == NULL
950 || strcmp (bfd_get_section_name (first->owner, first),
951 bfd_get_section_name (second->owner, second)) != 0)
954 /* Otherwise check that they are in corresponding objfiles. */
957 if (obj->obfd == first->owner)
959 gdb_assert (obj != NULL);
961 if (obj->separate_debug_objfile != NULL
962 && obj->separate_debug_objfile->obfd == second->owner)
964 if (obj->separate_debug_objfile_backlink != NULL
965 && obj->separate_debug_objfile_backlink->obfd == second->owner)
972 find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section)
974 struct objfile *objfile;
975 struct minimal_symbol *msymbol;
977 /* If we know that this is not a text address, return failure. This is
978 necessary because we loop based on texthigh and textlow, which do
979 not include the data ranges. */
980 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
982 && (MSYMBOL_TYPE (msymbol) == mst_data
983 || MSYMBOL_TYPE (msymbol) == mst_bss
984 || MSYMBOL_TYPE (msymbol) == mst_abs
985 || MSYMBOL_TYPE (msymbol) == mst_file_data
986 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
989 ALL_OBJFILES (objfile)
991 struct symtab *result = NULL;
994 result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
1003 /* Debug symbols usually don't have section information. We need to dig that
1004 out of the minimal symbols and stash that in the debug symbol. */
1007 fixup_section (struct general_symbol_info *ginfo,
1008 CORE_ADDR addr, struct objfile *objfile)
1010 struct minimal_symbol *msym;
1012 /* First, check whether a minimal symbol with the same name exists
1013 and points to the same address. The address check is required
1014 e.g. on PowerPC64, where the minimal symbol for a function will
1015 point to the function descriptor, while the debug symbol will
1016 point to the actual function code. */
1017 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1020 ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
1021 ginfo->section = SYMBOL_SECTION (msym);
1025 /* Static, function-local variables do appear in the linker
1026 (minimal) symbols, but are frequently given names that won't
1027 be found via lookup_minimal_symbol(). E.g., it has been
1028 observed in frv-uclinux (ELF) executables that a static,
1029 function-local variable named "foo" might appear in the
1030 linker symbols as "foo.6" or "foo.3". Thus, there is no
1031 point in attempting to extend the lookup-by-name mechanism to
1032 handle this case due to the fact that there can be multiple
1035 So, instead, search the section table when lookup by name has
1036 failed. The ``addr'' and ``endaddr'' fields may have already
1037 been relocated. If so, the relocation offset (i.e. the
1038 ANOFFSET value) needs to be subtracted from these values when
1039 performing the comparison. We unconditionally subtract it,
1040 because, when no relocation has been performed, the ANOFFSET
1041 value will simply be zero.
1043 The address of the symbol whose section we're fixing up HAS
1044 NOT BEEN adjusted (relocated) yet. It can't have been since
1045 the section isn't yet known and knowing the section is
1046 necessary in order to add the correct relocation value. In
1047 other words, we wouldn't even be in this function (attempting
1048 to compute the section) if it were already known.
1050 Note that it is possible to search the minimal symbols
1051 (subtracting the relocation value if necessary) to find the
1052 matching minimal symbol, but this is overkill and much less
1053 efficient. It is not necessary to find the matching minimal
1054 symbol, only its section.
1056 Note that this technique (of doing a section table search)
1057 can fail when unrelocated section addresses overlap. For
1058 this reason, we still attempt a lookup by name prior to doing
1059 a search of the section table. */
1061 struct obj_section *s;
1063 ALL_OBJFILE_OSECTIONS (objfile, s)
1065 int idx = s->the_bfd_section->index;
1066 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1068 if (obj_section_addr (s) - offset <= addr
1069 && addr < obj_section_endaddr (s) - offset)
1071 ginfo->obj_section = s;
1072 ginfo->section = idx;
1080 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1087 if (SYMBOL_OBJ_SECTION (sym))
1090 /* We either have an OBJFILE, or we can get at it from the sym's
1091 symtab. Anything else is a bug. */
1092 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1094 if (objfile == NULL)
1095 objfile = SYMBOL_SYMTAB (sym)->objfile;
1097 /* We should have an objfile by now. */
1098 gdb_assert (objfile);
1100 switch (SYMBOL_CLASS (sym))
1104 addr = SYMBOL_VALUE_ADDRESS (sym);
1107 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1111 /* Nothing else will be listed in the minsyms -- no use looking
1116 fixup_section (&sym->ginfo, addr, objfile);
1121 /* Compute the demangled form of NAME as used by the various symbol
1122 lookup functions. The result is stored in *RESULT_NAME. Returns a
1123 cleanup which can be used to clean up the result.
1125 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1126 Normally, Ada symbol lookups are performed using the encoded name
1127 rather than the demangled name, and so it might seem to make sense
1128 for this function to return an encoded version of NAME.
1129 Unfortunately, we cannot do this, because this function is used in
1130 circumstances where it is not appropriate to try to encode NAME.
1131 For instance, when displaying the frame info, we demangle the name
1132 of each parameter, and then perform a symbol lookup inside our
1133 function using that demangled name. In Ada, certain functions
1134 have internally-generated parameters whose name contain uppercase
1135 characters. Encoding those name would result in those uppercase
1136 characters to become lowercase, and thus cause the symbol lookup
1140 demangle_for_lookup (const char *name, enum language lang,
1141 const char **result_name)
1143 char *demangled_name = NULL;
1144 const char *modified_name = NULL;
1145 struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
1147 modified_name = name;
1149 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1150 lookup, so we can always binary search. */
1151 if (lang == language_cplus)
1153 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1156 modified_name = demangled_name;
1157 make_cleanup (xfree, demangled_name);
1161 /* If we were given a non-mangled name, canonicalize it
1162 according to the language (so far only for C++). */
1163 demangled_name = cp_canonicalize_string (name);
1166 modified_name = demangled_name;
1167 make_cleanup (xfree, demangled_name);
1171 else if (lang == language_java)
1173 demangled_name = cplus_demangle (name,
1174 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1177 modified_name = demangled_name;
1178 make_cleanup (xfree, demangled_name);
1181 else if (lang == language_d)
1183 demangled_name = d_demangle (name, 0);
1186 modified_name = demangled_name;
1187 make_cleanup (xfree, demangled_name);
1190 else if (lang == language_go)
1192 demangled_name = go_demangle (name, 0);
1195 modified_name = demangled_name;
1196 make_cleanup (xfree, demangled_name);
1200 *result_name = modified_name;
1204 /* Find the definition for a specified symbol name NAME
1205 in domain DOMAIN, visible from lexical block BLOCK.
1206 Returns the struct symbol pointer, or zero if no symbol is found.
1207 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1208 NAME is a field of the current implied argument `this'. If so set
1209 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1210 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1211 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1213 /* This function (or rather its subordinates) have a bunch of loops and
1214 it would seem to be attractive to put in some QUIT's (though I'm not really
1215 sure whether it can run long enough to be really important). But there
1216 are a few calls for which it would appear to be bad news to quit
1217 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1218 that there is C++ code below which can error(), but that probably
1219 doesn't affect these calls since they are looking for a known
1220 variable and thus can probably assume it will never hit the C++
1224 lookup_symbol_in_language (const char *name, const struct block *block,
1225 const domain_enum domain, enum language lang,
1226 int *is_a_field_of_this)
1228 const char *modified_name;
1229 struct symbol *returnval;
1230 struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name);
1232 returnval = lookup_symbol_aux (modified_name, block, domain, lang,
1233 is_a_field_of_this);
1234 do_cleanups (cleanup);
1239 /* Behave like lookup_symbol_in_language, but performed with the
1240 current language. */
1243 lookup_symbol (const char *name, const struct block *block,
1244 domain_enum domain, int *is_a_field_of_this)
1246 return lookup_symbol_in_language (name, block, domain,
1247 current_language->la_language,
1248 is_a_field_of_this);
1251 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1252 found, or NULL if not found. */
1255 lookup_language_this (const struct language_defn *lang,
1256 const struct block *block)
1258 if (lang->la_name_of_this == NULL || block == NULL)
1265 sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN);
1268 block_found = block;
1271 if (BLOCK_FUNCTION (block))
1273 block = BLOCK_SUPERBLOCK (block);
1279 /* Behave like lookup_symbol except that NAME is the natural name
1280 (e.g., demangled name) of the symbol that we're looking for. */
1282 static struct symbol *
1283 lookup_symbol_aux (const char *name, const struct block *block,
1284 const domain_enum domain, enum language language,
1285 int *is_a_field_of_this)
1288 const struct language_defn *langdef;
1290 /* Make sure we do something sensible with is_a_field_of_this, since
1291 the callers that set this parameter to some non-null value will
1292 certainly use it later and expect it to be either 0 or 1.
1293 If we don't set it, the contents of is_a_field_of_this are
1295 if (is_a_field_of_this != NULL)
1296 *is_a_field_of_this = 0;
1298 /* Search specified block and its superiors. Don't search
1299 STATIC_BLOCK or GLOBAL_BLOCK. */
1301 sym = lookup_symbol_aux_local (name, block, domain, language);
1305 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1306 check to see if NAME is a field of `this'. */
1308 langdef = language_def (language);
1310 if (is_a_field_of_this != NULL)
1312 struct symbol *sym = lookup_language_this (langdef, block);
1316 struct type *t = sym->type;
1318 /* I'm not really sure that type of this can ever
1319 be typedefed; just be safe. */
1321 if (TYPE_CODE (t) == TYPE_CODE_PTR
1322 || TYPE_CODE (t) == TYPE_CODE_REF)
1323 t = TYPE_TARGET_TYPE (t);
1325 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1326 && TYPE_CODE (t) != TYPE_CODE_UNION)
1327 error (_("Internal error: `%s' is not an aggregate"),
1328 langdef->la_name_of_this);
1330 if (check_field (t, name))
1332 *is_a_field_of_this = 1;
1338 /* Now do whatever is appropriate for LANGUAGE to look
1339 up static and global variables. */
1341 sym = langdef->la_lookup_symbol_nonlocal (name, block, domain);
1345 /* Now search all static file-level symbols. Not strictly correct,
1346 but more useful than an error. */
1348 return lookup_static_symbol_aux (name, domain);
1351 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1352 first, then check the psymtabs. If a psymtab indicates the existence of the
1353 desired name as a file-level static, then do psymtab-to-symtab conversion on
1354 the fly and return the found symbol. */
1357 lookup_static_symbol_aux (const char *name, const domain_enum domain)
1359 struct objfile *objfile;
1362 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain);
1366 ALL_OBJFILES (objfile)
1368 sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain);
1376 /* Check to see if the symbol is defined in BLOCK or its superiors.
1377 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1379 static struct symbol *
1380 lookup_symbol_aux_local (const char *name, const struct block *block,
1381 const domain_enum domain,
1382 enum language language)
1385 const struct block *static_block = block_static_block (block);
1386 const char *scope = block_scope (block);
1388 /* Check if either no block is specified or it's a global block. */
1390 if (static_block == NULL)
1393 while (block != static_block)
1395 sym = lookup_symbol_aux_block (name, block, domain);
1399 if (language == language_cplus || language == language_fortran)
1401 sym = cp_lookup_symbol_imports_or_template (scope, name, block,
1407 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
1409 block = BLOCK_SUPERBLOCK (block);
1412 /* We've reached the edge of the function without finding a result. */
1417 /* Look up OBJFILE to BLOCK. */
1420 lookup_objfile_from_block (const struct block *block)
1422 struct objfile *obj;
1428 block = block_global_block (block);
1429 /* Go through SYMTABS. */
1430 ALL_SYMTABS (obj, s)
1431 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1433 if (obj->separate_debug_objfile_backlink)
1434 obj = obj->separate_debug_objfile_backlink;
1442 /* Look up a symbol in a block; if found, fixup the symbol, and set
1443 block_found appropriately. */
1446 lookup_symbol_aux_block (const char *name, const struct block *block,
1447 const domain_enum domain)
1451 sym = lookup_block_symbol (block, name, domain);
1454 block_found = block;
1455 return fixup_symbol_section (sym, NULL);
1461 /* Check all global symbols in OBJFILE in symtabs and
1465 lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
1467 const domain_enum domain)
1469 const struct objfile *objfile;
1471 struct blockvector *bv;
1472 const struct block *block;
1475 for (objfile = main_objfile;
1477 objfile = objfile_separate_debug_iterate (main_objfile, objfile))
1479 /* Go through symtabs. */
1480 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1482 bv = BLOCKVECTOR (s);
1483 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1484 sym = lookup_block_symbol (block, name, domain);
1487 block_found = block;
1488 return fixup_symbol_section (sym, (struct objfile *)objfile);
1492 sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK,
1501 /* Check to see if the symbol is defined in one of the symtabs.
1502 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1503 depending on whether or not we want to search global symbols or
1506 static struct symbol *
1507 lookup_symbol_aux_symtabs (int block_index, const char *name,
1508 const domain_enum domain)
1511 struct objfile *objfile;
1512 struct blockvector *bv;
1513 const struct block *block;
1516 ALL_OBJFILES (objfile)
1519 objfile->sf->qf->pre_expand_symtabs_matching (objfile,
1523 ALL_OBJFILE_SYMTABS (objfile, s)
1526 bv = BLOCKVECTOR (s);
1527 block = BLOCKVECTOR_BLOCK (bv, block_index);
1528 sym = lookup_block_symbol (block, name, domain);
1531 block_found = block;
1532 return fixup_symbol_section (sym, objfile);
1540 /* A helper function for lookup_symbol_aux that interfaces with the
1541 "quick" symbol table functions. */
1543 static struct symbol *
1544 lookup_symbol_aux_quick (struct objfile *objfile, int kind,
1545 const char *name, const domain_enum domain)
1547 struct symtab *symtab;
1548 struct blockvector *bv;
1549 const struct block *block;
1554 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain);
1558 bv = BLOCKVECTOR (symtab);
1559 block = BLOCKVECTOR_BLOCK (bv, kind);
1560 sym = lookup_block_symbol (block, name, domain);
1563 /* This shouldn't be necessary, but as a last resort try
1564 looking in the statics even though the psymtab claimed
1565 the symbol was global, or vice-versa. It's possible
1566 that the psymtab gets it wrong in some cases. */
1568 /* FIXME: carlton/2002-09-30: Should we really do that?
1569 If that happens, isn't it likely to be a GDB error, in
1570 which case we should fix the GDB error rather than
1571 silently dealing with it here? So I'd vote for
1572 removing the check for the symbol in the other
1574 block = BLOCKVECTOR_BLOCK (bv,
1575 kind == GLOBAL_BLOCK ?
1576 STATIC_BLOCK : GLOBAL_BLOCK);
1577 sym = lookup_block_symbol (block, name, domain);
1580 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1581 %s may be an inlined function, or may be a template function\n\
1582 (if a template, try specifying an instantiation: %s<type>)."),
1583 kind == GLOBAL_BLOCK ? "global" : "static",
1584 name, symtab->filename, name, name);
1586 return fixup_symbol_section (sym, objfile);
1589 /* A default version of lookup_symbol_nonlocal for use by languages
1590 that can't think of anything better to do. This implements the C
1594 basic_lookup_symbol_nonlocal (const char *name,
1595 const struct block *block,
1596 const domain_enum domain)
1600 /* NOTE: carlton/2003-05-19: The comments below were written when
1601 this (or what turned into this) was part of lookup_symbol_aux;
1602 I'm much less worried about these questions now, since these
1603 decisions have turned out well, but I leave these comments here
1606 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1607 not it would be appropriate to search the current global block
1608 here as well. (That's what this code used to do before the
1609 is_a_field_of_this check was moved up.) On the one hand, it's
1610 redundant with the lookup_symbol_aux_symtabs search that happens
1611 next. On the other hand, if decode_line_1 is passed an argument
1612 like filename:var, then the user presumably wants 'var' to be
1613 searched for in filename. On the third hand, there shouldn't be
1614 multiple global variables all of which are named 'var', and it's
1615 not like decode_line_1 has ever restricted its search to only
1616 global variables in a single filename. All in all, only
1617 searching the static block here seems best: it's correct and it's
1620 /* NOTE: carlton/2002-12-05: There's also a possible performance
1621 issue here: if you usually search for global symbols in the
1622 current file, then it would be slightly better to search the
1623 current global block before searching all the symtabs. But there
1624 are other factors that have a much greater effect on performance
1625 than that one, so I don't think we should worry about that for
1628 sym = lookup_symbol_static (name, block, domain);
1632 return lookup_symbol_global (name, block, domain);
1635 /* Lookup a symbol in the static block associated to BLOCK, if there
1636 is one; do nothing if BLOCK is NULL or a global block. */
1639 lookup_symbol_static (const char *name,
1640 const struct block *block,
1641 const domain_enum domain)
1643 const struct block *static_block = block_static_block (block);
1645 if (static_block != NULL)
1646 return lookup_symbol_aux_block (name, static_block, domain);
1651 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1655 lookup_symbol_global (const char *name,
1656 const struct block *block,
1657 const domain_enum domain)
1659 struct symbol *sym = NULL;
1660 struct objfile *objfile = NULL;
1662 /* Call library-specific lookup procedure. */
1663 objfile = lookup_objfile_from_block (block);
1664 if (objfile != NULL)
1665 sym = solib_global_lookup (objfile, name, domain);
1669 sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, domain);
1673 ALL_OBJFILES (objfile)
1675 sym = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK, name, domain);
1684 symbol_matches_domain (enum language symbol_language,
1685 domain_enum symbol_domain,
1688 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1689 A Java class declaration also defines a typedef for the class.
1690 Similarly, any Ada type declaration implicitly defines a typedef. */
1691 if (symbol_language == language_cplus
1692 || symbol_language == language_d
1693 || symbol_language == language_java
1694 || symbol_language == language_ada)
1696 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1697 && symbol_domain == STRUCT_DOMAIN)
1700 /* For all other languages, strict match is required. */
1701 return (symbol_domain == domain);
1704 /* Look up a type named NAME in the struct_domain. The type returned
1705 must not be opaque -- i.e., must have at least one field
1709 lookup_transparent_type (const char *name)
1711 return current_language->la_lookup_transparent_type (name);
1714 /* A helper for basic_lookup_transparent_type that interfaces with the
1715 "quick" symbol table functions. */
1717 static struct type *
1718 basic_lookup_transparent_type_quick (struct objfile *objfile, int kind,
1721 struct symtab *symtab;
1722 struct blockvector *bv;
1723 struct block *block;
1728 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN);
1732 bv = BLOCKVECTOR (symtab);
1733 block = BLOCKVECTOR_BLOCK (bv, kind);
1734 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1737 int other_kind = kind == GLOBAL_BLOCK ? STATIC_BLOCK : GLOBAL_BLOCK;
1739 /* This shouldn't be necessary, but as a last resort
1740 * try looking in the 'other kind' even though the psymtab
1741 * claimed the symbol was one thing. It's possible that
1742 * the psymtab gets it wrong in some cases.
1744 block = BLOCKVECTOR_BLOCK (bv, other_kind);
1745 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1747 /* FIXME; error is wrong in one case. */
1749 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1750 %s may be an inlined function, or may be a template function\n\
1751 (if a template, try specifying an instantiation: %s<type>)."),
1752 name, symtab->filename, name, name);
1754 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1755 return SYMBOL_TYPE (sym);
1760 /* The standard implementation of lookup_transparent_type. This code
1761 was modeled on lookup_symbol -- the parts not relevant to looking
1762 up types were just left out. In particular it's assumed here that
1763 types are available in struct_domain and only at file-static or
1767 basic_lookup_transparent_type (const char *name)
1770 struct symtab *s = NULL;
1771 struct blockvector *bv;
1772 struct objfile *objfile;
1773 struct block *block;
1776 /* Now search all the global symbols. Do the symtab's first, then
1777 check the psymtab's. If a psymtab indicates the existence
1778 of the desired name as a global, then do psymtab-to-symtab
1779 conversion on the fly and return the found symbol. */
1781 ALL_OBJFILES (objfile)
1784 objfile->sf->qf->pre_expand_symtabs_matching (objfile,
1786 name, STRUCT_DOMAIN);
1788 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1790 bv = BLOCKVECTOR (s);
1791 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1792 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1793 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1795 return SYMBOL_TYPE (sym);
1800 ALL_OBJFILES (objfile)
1802 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
1807 /* Now search the static file-level symbols.
1808 Not strictly correct, but more useful than an error.
1809 Do the symtab's first, then
1810 check the psymtab's. If a psymtab indicates the existence
1811 of the desired name as a file-level static, then do psymtab-to-symtab
1812 conversion on the fly and return the found symbol. */
1814 ALL_OBJFILES (objfile)
1817 objfile->sf->qf->pre_expand_symtabs_matching (objfile, STATIC_BLOCK,
1818 name, STRUCT_DOMAIN);
1820 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1822 bv = BLOCKVECTOR (s);
1823 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1824 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1825 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1827 return SYMBOL_TYPE (sym);
1832 ALL_OBJFILES (objfile)
1834 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
1839 return (struct type *) 0;
1842 /* Find the name of the file containing main(). */
1843 /* FIXME: What about languages without main() or specially linked
1844 executables that have no main() ? */
1847 find_main_filename (void)
1849 struct objfile *objfile;
1850 char *name = main_name ();
1852 ALL_OBJFILES (objfile)
1858 result = objfile->sf->qf->find_symbol_file (objfile, name);
1865 /* Search BLOCK for symbol NAME in DOMAIN.
1867 Note that if NAME is the demangled form of a C++ symbol, we will fail
1868 to find a match during the binary search of the non-encoded names, but
1869 for now we don't worry about the slight inefficiency of looking for
1870 a match we'll never find, since it will go pretty quick. Once the
1871 binary search terminates, we drop through and do a straight linear
1872 search on the symbols. Each symbol which is marked as being a ObjC/C++
1873 symbol (language_cplus or language_objc set) has both the encoded and
1874 non-encoded names tested for a match. */
1877 lookup_block_symbol (const struct block *block, const char *name,
1878 const domain_enum domain)
1880 struct block_iterator iter;
1883 if (!BLOCK_FUNCTION (block))
1885 for (sym = block_iter_name_first (block, name, &iter);
1887 sym = block_iter_name_next (name, &iter))
1889 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1890 SYMBOL_DOMAIN (sym), domain))
1897 /* Note that parameter symbols do not always show up last in the
1898 list; this loop makes sure to take anything else other than
1899 parameter symbols first; it only uses parameter symbols as a
1900 last resort. Note that this only takes up extra computation
1903 struct symbol *sym_found = NULL;
1905 for (sym = block_iter_name_first (block, name, &iter);
1907 sym = block_iter_name_next (name, &iter))
1909 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1910 SYMBOL_DOMAIN (sym), domain))
1913 if (!SYMBOL_IS_ARGUMENT (sym))
1919 return (sym_found); /* Will be NULL if not found. */
1923 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
1926 For each symbol that matches, CALLBACK is called. The symbol and
1927 DATA are passed to the callback.
1929 If CALLBACK returns zero, the iteration ends. Otherwise, the
1930 search continues. This function iterates upward through blocks.
1931 When the outermost block has been finished, the function
1935 iterate_over_symbols (const struct block *block, const char *name,
1936 const domain_enum domain,
1937 symbol_found_callback_ftype *callback,
1942 struct block_iterator iter;
1945 for (sym = block_iter_name_first (block, name, &iter);
1947 sym = block_iter_name_next (name, &iter))
1949 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1950 SYMBOL_DOMAIN (sym), domain))
1952 if (!callback (sym, data))
1957 block = BLOCK_SUPERBLOCK (block);
1961 /* Find the symtab associated with PC and SECTION. Look through the
1962 psymtabs and read in another symtab if necessary. */
1965 find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
1968 struct blockvector *bv;
1969 struct symtab *s = NULL;
1970 struct symtab *best_s = NULL;
1971 struct objfile *objfile;
1972 struct program_space *pspace;
1973 CORE_ADDR distance = 0;
1974 struct minimal_symbol *msymbol;
1976 pspace = current_program_space;
1978 /* If we know that this is not a text address, return failure. This is
1979 necessary because we loop based on the block's high and low code
1980 addresses, which do not include the data ranges, and because
1981 we call find_pc_sect_psymtab which has a similar restriction based
1982 on the partial_symtab's texthigh and textlow. */
1983 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
1985 && (MSYMBOL_TYPE (msymbol) == mst_data
1986 || MSYMBOL_TYPE (msymbol) == mst_bss
1987 || MSYMBOL_TYPE (msymbol) == mst_abs
1988 || MSYMBOL_TYPE (msymbol) == mst_file_data
1989 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
1992 /* Search all symtabs for the one whose file contains our address, and which
1993 is the smallest of all the ones containing the address. This is designed
1994 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1995 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1996 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1998 This happens for native ecoff format, where code from included files
1999 gets its own symtab. The symtab for the included file should have
2000 been read in already via the dependency mechanism.
2001 It might be swifter to create several symtabs with the same name
2002 like xcoff does (I'm not sure).
2004 It also happens for objfiles that have their functions reordered.
2005 For these, the symtab we are looking for is not necessarily read in. */
2007 ALL_PRIMARY_SYMTABS (objfile, s)
2009 bv = BLOCKVECTOR (s);
2010 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2012 if (BLOCK_START (b) <= pc
2013 && BLOCK_END (b) > pc
2015 || BLOCK_END (b) - BLOCK_START (b) < distance))
2017 /* For an objfile that has its functions reordered,
2018 find_pc_psymtab will find the proper partial symbol table
2019 and we simply return its corresponding symtab. */
2020 /* In order to better support objfiles that contain both
2021 stabs and coff debugging info, we continue on if a psymtab
2023 if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
2025 struct symtab *result;
2028 = objfile->sf->qf->find_pc_sect_symtab (objfile,
2037 struct block_iterator iter;
2038 struct symbol *sym = NULL;
2040 ALL_BLOCK_SYMBOLS (b, iter, sym)
2042 fixup_symbol_section (sym, objfile);
2043 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
2047 continue; /* No symbol in this symtab matches
2050 distance = BLOCK_END (b) - BLOCK_START (b);
2058 ALL_OBJFILES (objfile)
2060 struct symtab *result;
2064 result = objfile->sf->qf->find_pc_sect_symtab (objfile,
2075 /* Find the symtab associated with PC. Look through the psymtabs and read
2076 in another symtab if necessary. Backward compatibility, no section. */
2079 find_pc_symtab (CORE_ADDR pc)
2081 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2085 /* Find the source file and line number for a given PC value and SECTION.
2086 Return a structure containing a symtab pointer, a line number,
2087 and a pc range for the entire source line.
2088 The value's .pc field is NOT the specified pc.
2089 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2090 use the line that ends there. Otherwise, in that case, the line
2091 that begins there is used. */
2093 /* The big complication here is that a line may start in one file, and end just
2094 before the start of another file. This usually occurs when you #include
2095 code in the middle of a subroutine. To properly find the end of a line's PC
2096 range, we must search all symtabs associated with this compilation unit, and
2097 find the one whose first PC is closer than that of the next line in this
2100 /* If it's worth the effort, we could be using a binary search. */
2102 struct symtab_and_line
2103 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
2106 struct linetable *l;
2109 struct linetable_entry *item;
2110 struct symtab_and_line val;
2111 struct blockvector *bv;
2112 struct minimal_symbol *msymbol;
2113 struct minimal_symbol *mfunsym;
2114 struct objfile *objfile;
2116 /* Info on best line seen so far, and where it starts, and its file. */
2118 struct linetable_entry *best = NULL;
2119 CORE_ADDR best_end = 0;
2120 struct symtab *best_symtab = 0;
2122 /* Store here the first line number
2123 of a file which contains the line at the smallest pc after PC.
2124 If we don't find a line whose range contains PC,
2125 we will use a line one less than this,
2126 with a range from the start of that file to the first line's pc. */
2127 struct linetable_entry *alt = NULL;
2128 struct symtab *alt_symtab = 0;
2130 /* Info on best line seen in this file. */
2132 struct linetable_entry *prev;
2134 /* If this pc is not from the current frame,
2135 it is the address of the end of a call instruction.
2136 Quite likely that is the start of the following statement.
2137 But what we want is the statement containing the instruction.
2138 Fudge the pc to make sure we get that. */
2140 init_sal (&val); /* initialize to zeroes */
2142 val.pspace = current_program_space;
2144 /* It's tempting to assume that, if we can't find debugging info for
2145 any function enclosing PC, that we shouldn't search for line
2146 number info, either. However, GAS can emit line number info for
2147 assembly files --- very helpful when debugging hand-written
2148 assembly code. In such a case, we'd have no debug info for the
2149 function, but we would have line info. */
2154 /* elz: added this because this function returned the wrong
2155 information if the pc belongs to a stub (import/export)
2156 to call a shlib function. This stub would be anywhere between
2157 two functions in the target, and the line info was erroneously
2158 taken to be the one of the line before the pc. */
2160 /* RT: Further explanation:
2162 * We have stubs (trampolines) inserted between procedures.
2164 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2165 * exists in the main image.
2167 * In the minimal symbol table, we have a bunch of symbols
2168 * sorted by start address. The stubs are marked as "trampoline",
2169 * the others appear as text. E.g.:
2171 * Minimal symbol table for main image
2172 * main: code for main (text symbol)
2173 * shr1: stub (trampoline symbol)
2174 * foo: code for foo (text symbol)
2176 * Minimal symbol table for "shr1" image:
2178 * shr1: code for shr1 (text symbol)
2181 * So the code below is trying to detect if we are in the stub
2182 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2183 * and if found, do the symbolization from the real-code address
2184 * rather than the stub address.
2186 * Assumptions being made about the minimal symbol table:
2187 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2188 * if we're really in the trampoline.s If we're beyond it (say
2189 * we're in "foo" in the above example), it'll have a closer
2190 * symbol (the "foo" text symbol for example) and will not
2191 * return the trampoline.
2192 * 2. lookup_minimal_symbol_text() will find a real text symbol
2193 * corresponding to the trampoline, and whose address will
2194 * be different than the trampoline address. I put in a sanity
2195 * check for the address being the same, to avoid an
2196 * infinite recursion.
2198 msymbol = lookup_minimal_symbol_by_pc (pc);
2199 if (msymbol != NULL)
2200 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2202 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2204 if (mfunsym == NULL)
2205 /* I eliminated this warning since it is coming out
2206 * in the following situation:
2207 * gdb shmain // test program with shared libraries
2208 * (gdb) break shr1 // function in shared lib
2209 * Warning: In stub for ...
2210 * In the above situation, the shared lib is not loaded yet,
2211 * so of course we can't find the real func/line info,
2212 * but the "break" still works, and the warning is annoying.
2213 * So I commented out the warning. RT */
2214 /* warning ("In stub for %s; unable to find real function/line info",
2215 SYMBOL_LINKAGE_NAME (msymbol)); */
2218 else if (SYMBOL_VALUE_ADDRESS (mfunsym)
2219 == SYMBOL_VALUE_ADDRESS (msymbol))
2220 /* Avoid infinite recursion */
2221 /* See above comment about why warning is commented out. */
2222 /* warning ("In stub for %s; unable to find real function/line info",
2223 SYMBOL_LINKAGE_NAME (msymbol)); */
2227 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2231 s = find_pc_sect_symtab (pc, section);
2234 /* If no symbol information, return previous pc. */
2241 bv = BLOCKVECTOR (s);
2242 objfile = s->objfile;
2244 /* Look at all the symtabs that share this blockvector.
2245 They all have the same apriori range, that we found was right;
2246 but they have different line tables. */
2248 ALL_OBJFILE_SYMTABS (objfile, s)
2250 if (BLOCKVECTOR (s) != bv)
2253 /* Find the best line in this symtab. */
2260 /* I think len can be zero if the symtab lacks line numbers
2261 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2262 I'm not sure which, and maybe it depends on the symbol
2268 item = l->item; /* Get first line info. */
2270 /* Is this file's first line closer than the first lines of other files?
2271 If so, record this file, and its first line, as best alternate. */
2272 if (item->pc > pc && (!alt || item->pc < alt->pc))
2278 for (i = 0; i < len; i++, item++)
2280 /* Leave prev pointing to the linetable entry for the last line
2281 that started at or before PC. */
2288 /* At this point, prev points at the line whose start addr is <= pc, and
2289 item points at the next line. If we ran off the end of the linetable
2290 (pc >= start of the last line), then prev == item. If pc < start of
2291 the first line, prev will not be set. */
2293 /* Is this file's best line closer than the best in the other files?
2294 If so, record this file, and its best line, as best so far. Don't
2295 save prev if it represents the end of a function (i.e. line number
2296 0) instead of a real line. */
2298 if (prev && prev->line && (!best || prev->pc > best->pc))
2303 /* Discard BEST_END if it's before the PC of the current BEST. */
2304 if (best_end <= best->pc)
2308 /* If another line (denoted by ITEM) is in the linetable and its
2309 PC is after BEST's PC, but before the current BEST_END, then
2310 use ITEM's PC as the new best_end. */
2311 if (best && i < len && item->pc > best->pc
2312 && (best_end == 0 || best_end > item->pc))
2313 best_end = item->pc;
2318 /* If we didn't find any line number info, just return zeros.
2319 We used to return alt->line - 1 here, but that could be
2320 anywhere; if we don't have line number info for this PC,
2321 don't make some up. */
2324 else if (best->line == 0)
2326 /* If our best fit is in a range of PC's for which no line
2327 number info is available (line number is zero) then we didn't
2328 find any valid line information. */
2333 val.symtab = best_symtab;
2334 val.line = best->line;
2336 if (best_end && (!alt || best_end < alt->pc))
2341 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2343 val.section = section;
2347 /* Backward compatibility (no section). */
2349 struct symtab_and_line
2350 find_pc_line (CORE_ADDR pc, int notcurrent)
2352 struct obj_section *section;
2354 section = find_pc_overlay (pc);
2355 if (pc_in_unmapped_range (pc, section))
2356 pc = overlay_mapped_address (pc, section);
2357 return find_pc_sect_line (pc, section, notcurrent);
2360 /* Find line number LINE in any symtab whose name is the same as
2363 If found, return the symtab that contains the linetable in which it was
2364 found, set *INDEX to the index in the linetable of the best entry
2365 found, and set *EXACT_MATCH nonzero if the value returned is an
2368 If not found, return NULL. */
2371 find_line_symtab (struct symtab *symtab, int line,
2372 int *index, int *exact_match)
2374 int exact = 0; /* Initialized here to avoid a compiler warning. */
2376 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2380 struct linetable *best_linetable;
2381 struct symtab *best_symtab;
2383 /* First try looking it up in the given symtab. */
2384 best_linetable = LINETABLE (symtab);
2385 best_symtab = symtab;
2386 best_index = find_line_common (best_linetable, line, &exact, 0);
2387 if (best_index < 0 || !exact)
2389 /* Didn't find an exact match. So we better keep looking for
2390 another symtab with the same name. In the case of xcoff,
2391 multiple csects for one source file (produced by IBM's FORTRAN
2392 compiler) produce multiple symtabs (this is unavoidable
2393 assuming csects can be at arbitrary places in memory and that
2394 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2396 /* BEST is the smallest linenumber > LINE so far seen,
2397 or 0 if none has been seen so far.
2398 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2401 struct objfile *objfile;
2404 if (best_index >= 0)
2405 best = best_linetable->item[best_index].line;
2409 ALL_OBJFILES (objfile)
2412 objfile->sf->qf->expand_symtabs_with_filename (objfile,
2416 /* Get symbol full file name if possible. */
2417 symtab_to_fullname (symtab);
2419 ALL_SYMTABS (objfile, s)
2421 struct linetable *l;
2424 if (FILENAME_CMP (symtab->filename, s->filename) != 0)
2426 if (symtab->fullname != NULL
2427 && symtab_to_fullname (s) != NULL
2428 && FILENAME_CMP (symtab->fullname, s->fullname) != 0)
2431 ind = find_line_common (l, line, &exact, 0);
2441 if (best == 0 || l->item[ind].line < best)
2443 best = l->item[ind].line;
2456 *index = best_index;
2458 *exact_match = exact;
2463 /* Given SYMTAB, returns all the PCs function in the symtab that
2464 exactly match LINE. Returns NULL if there are no exact matches,
2465 but updates BEST_ITEM in this case. */
2468 find_pcs_for_symtab_line (struct symtab *symtab, int line,
2469 struct linetable_entry **best_item)
2472 struct symbol *previous_function = NULL;
2473 VEC (CORE_ADDR) *result = NULL;
2475 /* First, collect all the PCs that are at this line. */
2481 idx = find_line_common (LINETABLE (symtab), line, &was_exact, start);
2487 struct linetable_entry *item = &LINETABLE (symtab)->item[idx];
2489 if (*best_item == NULL || item->line < (*best_item)->line)
2495 VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc);
2503 /* Set the PC value for a given source file and line number and return true.
2504 Returns zero for invalid line number (and sets the PC to 0).
2505 The source file is specified with a struct symtab. */
2508 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2510 struct linetable *l;
2517 symtab = find_line_symtab (symtab, line, &ind, NULL);
2520 l = LINETABLE (symtab);
2521 *pc = l->item[ind].pc;
2528 /* Find the range of pc values in a line.
2529 Store the starting pc of the line into *STARTPTR
2530 and the ending pc (start of next line) into *ENDPTR.
2531 Returns 1 to indicate success.
2532 Returns 0 if could not find the specified line. */
2535 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2538 CORE_ADDR startaddr;
2539 struct symtab_and_line found_sal;
2542 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2545 /* This whole function is based on address. For example, if line 10 has
2546 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2547 "info line *0x123" should say the line goes from 0x100 to 0x200
2548 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2549 This also insures that we never give a range like "starts at 0x134
2550 and ends at 0x12c". */
2552 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2553 if (found_sal.line != sal.line)
2555 /* The specified line (sal) has zero bytes. */
2556 *startptr = found_sal.pc;
2557 *endptr = found_sal.pc;
2561 *startptr = found_sal.pc;
2562 *endptr = found_sal.end;
2567 /* Given a line table and a line number, return the index into the line
2568 table for the pc of the nearest line whose number is >= the specified one.
2569 Return -1 if none is found. The value is >= 0 if it is an index.
2570 START is the index at which to start searching the line table.
2572 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2575 find_line_common (struct linetable *l, int lineno,
2576 int *exact_match, int start)
2581 /* BEST is the smallest linenumber > LINENO so far seen,
2582 or 0 if none has been seen so far.
2583 BEST_INDEX identifies the item for it. */
2585 int best_index = -1;
2596 for (i = start; i < len; i++)
2598 struct linetable_entry *item = &(l->item[i]);
2600 if (item->line == lineno)
2602 /* Return the first (lowest address) entry which matches. */
2607 if (item->line > lineno && (best == 0 || item->line < best))
2614 /* If we got here, we didn't get an exact match. */
2619 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2621 struct symtab_and_line sal;
2623 sal = find_pc_line (pc, 0);
2626 return sal.symtab != 0;
2629 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2630 address for that function that has an entry in SYMTAB's line info
2631 table. If such an entry cannot be found, return FUNC_ADDR
2635 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
2637 CORE_ADDR func_start, func_end;
2638 struct linetable *l;
2641 /* Give up if this symbol has no lineinfo table. */
2642 l = LINETABLE (symtab);
2646 /* Get the range for the function's PC values, or give up if we
2647 cannot, for some reason. */
2648 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
2651 /* Linetable entries are ordered by PC values, see the commentary in
2652 symtab.h where `struct linetable' is defined. Thus, the first
2653 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2654 address we are looking for. */
2655 for (i = 0; i < l->nitems; i++)
2657 struct linetable_entry *item = &(l->item[i]);
2659 /* Don't use line numbers of zero, they mark special entries in
2660 the table. See the commentary on symtab.h before the
2661 definition of struct linetable. */
2662 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
2669 /* Given a function symbol SYM, find the symtab and line for the start
2671 If the argument FUNFIRSTLINE is nonzero, we want the first line
2672 of real code inside the function. */
2674 struct symtab_and_line
2675 find_function_start_sal (struct symbol *sym, int funfirstline)
2677 struct symtab_and_line sal;
2679 fixup_symbol_section (sym, NULL);
2680 sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
2681 SYMBOL_OBJ_SECTION (sym), 0);
2683 /* We always should have a line for the function start address.
2684 If we don't, something is odd. Create a plain SAL refering
2685 just the PC and hope that skip_prologue_sal (if requested)
2686 can find a line number for after the prologue. */
2687 if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym)))
2690 sal.pspace = current_program_space;
2691 sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2692 sal.section = SYMBOL_OBJ_SECTION (sym);
2696 skip_prologue_sal (&sal);
2701 /* Adjust SAL to the first instruction past the function prologue.
2702 If the PC was explicitly specified, the SAL is not changed.
2703 If the line number was explicitly specified, at most the SAL's PC
2704 is updated. If SAL is already past the prologue, then do nothing. */
2707 skip_prologue_sal (struct symtab_and_line *sal)
2710 struct symtab_and_line start_sal;
2711 struct cleanup *old_chain;
2712 CORE_ADDR pc, saved_pc;
2713 struct obj_section *section;
2715 struct objfile *objfile;
2716 struct gdbarch *gdbarch;
2717 struct block *b, *function_block;
2718 int force_skip, skip;
2720 /* Do not change the SAL is PC was specified explicitly. */
2721 if (sal->explicit_pc)
2724 old_chain = save_current_space_and_thread ();
2725 switch_to_program_space_and_thread (sal->pspace);
2727 sym = find_pc_sect_function (sal->pc, sal->section);
2730 fixup_symbol_section (sym, NULL);
2732 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2733 section = SYMBOL_OBJ_SECTION (sym);
2734 name = SYMBOL_LINKAGE_NAME (sym);
2735 objfile = SYMBOL_SYMTAB (sym)->objfile;
2739 struct minimal_symbol *msymbol
2740 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
2742 if (msymbol == NULL)
2744 do_cleanups (old_chain);
2748 pc = SYMBOL_VALUE_ADDRESS (msymbol);
2749 section = SYMBOL_OBJ_SECTION (msymbol);
2750 name = SYMBOL_LINKAGE_NAME (msymbol);
2751 objfile = msymbol_objfile (msymbol);
2754 gdbarch = get_objfile_arch (objfile);
2756 /* Process the prologue in two passes. In the first pass try to skip the
2757 prologue (SKIP is true) and verify there is a real need for it (indicated
2758 by FORCE_SKIP). If no such reason was found run a second pass where the
2759 prologue is not skipped (SKIP is false). */
2764 /* Be conservative - allow direct PC (without skipping prologue) only if we
2765 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2766 have to be set by the caller so we use SYM instead. */
2767 if (sym && SYMBOL_SYMTAB (sym)->locations_valid)
2775 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2776 so that gdbarch_skip_prologue has something unique to work on. */
2777 if (section_is_overlay (section) && !section_is_mapped (section))
2778 pc = overlay_unmapped_address (pc, section);
2780 /* Skip "first line" of function (which is actually its prologue). */
2781 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2783 pc = gdbarch_skip_prologue (gdbarch, pc);
2785 /* For overlays, map pc back into its mapped VMA range. */
2786 pc = overlay_mapped_address (pc, section);
2788 /* Calculate line number. */
2789 start_sal = find_pc_sect_line (pc, section, 0);
2791 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2792 line is still part of the same function. */
2793 if (skip && start_sal.pc != pc
2794 && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
2795 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2796 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section)
2797 == lookup_minimal_symbol_by_pc_section (pc, section))))
2799 /* First pc of next line */
2801 /* Recalculate the line number (might not be N+1). */
2802 start_sal = find_pc_sect_line (pc, section, 0);
2805 /* On targets with executable formats that don't have a concept of
2806 constructors (ELF with .init has, PE doesn't), gcc emits a call
2807 to `__main' in `main' between the prologue and before user
2809 if (gdbarch_skip_main_prologue_p (gdbarch)
2810 && name && strcmp_iw (name, "main") == 0)
2812 pc = gdbarch_skip_main_prologue (gdbarch, pc);
2813 /* Recalculate the line number (might not be N+1). */
2814 start_sal = find_pc_sect_line (pc, section, 0);
2818 while (!force_skip && skip--);
2820 /* If we still don't have a valid source line, try to find the first
2821 PC in the lineinfo table that belongs to the same function. This
2822 happens with COFF debug info, which does not seem to have an
2823 entry in lineinfo table for the code after the prologue which has
2824 no direct relation to source. For example, this was found to be
2825 the case with the DJGPP target using "gcc -gcoff" when the
2826 compiler inserted code after the prologue to make sure the stack
2828 if (!force_skip && sym && start_sal.symtab == NULL)
2830 pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
2831 /* Recalculate the line number. */
2832 start_sal = find_pc_sect_line (pc, section, 0);
2835 do_cleanups (old_chain);
2837 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2838 forward SAL to the end of the prologue. */
2843 sal->section = section;
2845 /* Unless the explicit_line flag was set, update the SAL line
2846 and symtab to correspond to the modified PC location. */
2847 if (sal->explicit_line)
2850 sal->symtab = start_sal.symtab;
2851 sal->line = start_sal.line;
2852 sal->end = start_sal.end;
2854 /* Check if we are now inside an inlined function. If we can,
2855 use the call site of the function instead. */
2856 b = block_for_pc_sect (sal->pc, sal->section);
2857 function_block = NULL;
2860 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
2862 else if (BLOCK_FUNCTION (b) != NULL)
2864 b = BLOCK_SUPERBLOCK (b);
2866 if (function_block != NULL
2867 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
2869 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
2870 sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
2874 /* If P is of the form "operator[ \t]+..." where `...' is
2875 some legitimate operator text, return a pointer to the
2876 beginning of the substring of the operator text.
2877 Otherwise, return "". */
2880 operator_chars (char *p, char **end)
2883 if (strncmp (p, "operator", 8))
2887 /* Don't get faked out by `operator' being part of a longer
2889 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2892 /* Allow some whitespace between `operator' and the operator symbol. */
2893 while (*p == ' ' || *p == '\t')
2896 /* Recognize 'operator TYPENAME'. */
2898 if (isalpha (*p) || *p == '_' || *p == '$')
2902 while (isalnum (*q) || *q == '_' || *q == '$')
2911 case '\\': /* regexp quoting */
2914 if (p[2] == '=') /* 'operator\*=' */
2916 else /* 'operator\*' */
2920 else if (p[1] == '[')
2923 error (_("mismatched quoting on brackets, "
2924 "try 'operator\\[\\]'"));
2925 else if (p[2] == '\\' && p[3] == ']')
2927 *end = p + 4; /* 'operator\[\]' */
2931 error (_("nothing is allowed between '[' and ']'"));
2935 /* Gratuitous qoute: skip it and move on. */
2957 if (p[0] == '-' && p[1] == '>')
2959 /* Struct pointer member operator 'operator->'. */
2962 *end = p + 3; /* 'operator->*' */
2965 else if (p[2] == '\\')
2967 *end = p + 4; /* Hopefully 'operator->\*' */
2972 *end = p + 2; /* 'operator->' */
2976 if (p[1] == '=' || p[1] == p[0])
2987 error (_("`operator ()' must be specified "
2988 "without whitespace in `()'"));
2993 error (_("`operator ?:' must be specified "
2994 "without whitespace in `?:'"));
2999 error (_("`operator []' must be specified "
3000 "without whitespace in `[]'"));
3004 error (_("`operator %s' not supported"), p);
3013 /* If FILE is not already in the table of files, return zero;
3014 otherwise return non-zero. Optionally add FILE to the table if ADD
3015 is non-zero. If *FIRST is non-zero, forget the old table
3019 filename_seen (const char *file, int add, int *first)
3021 /* Table of files seen so far. */
3022 static const char **tab = NULL;
3023 /* Allocated size of tab in elements.
3024 Start with one 256-byte block (when using GNU malloc.c).
3025 24 is the malloc overhead when range checking is in effect. */
3026 static int tab_alloc_size = (256 - 24) / sizeof (char *);
3027 /* Current size of tab in elements. */
3028 static int tab_cur_size;
3034 tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
3038 /* Is FILE in tab? */
3039 for (p = tab; p < tab + tab_cur_size; p++)
3040 if (filename_cmp (*p, file) == 0)
3043 /* No; maybe add it to tab. */
3046 if (tab_cur_size == tab_alloc_size)
3048 tab_alloc_size *= 2;
3049 tab = (const char **) xrealloc ((char *) tab,
3050 tab_alloc_size * sizeof (*tab));
3052 tab[tab_cur_size++] = file;
3058 /* Slave routine for sources_info. Force line breaks at ,'s.
3059 NAME is the name to print and *FIRST is nonzero if this is the first
3060 name printed. Set *FIRST to zero. */
3063 output_source_filename (const char *name, int *first)
3065 /* Since a single source file can result in several partial symbol
3066 tables, we need to avoid printing it more than once. Note: if
3067 some of the psymtabs are read in and some are not, it gets
3068 printed both under "Source files for which symbols have been
3069 read" and "Source files for which symbols will be read in on
3070 demand". I consider this a reasonable way to deal with the
3071 situation. I'm not sure whether this can also happen for
3072 symtabs; it doesn't hurt to check. */
3074 /* Was NAME already seen? */
3075 if (filename_seen (name, 1, first))
3077 /* Yes; don't print it again. */
3080 /* No; print it and reset *FIRST. */
3087 printf_filtered (", ");
3091 fputs_filtered (name, gdb_stdout);
3094 /* A callback for map_partial_symbol_filenames. */
3097 output_partial_symbol_filename (const char *filename, const char *fullname,
3100 output_source_filename (fullname ? fullname : filename, data);
3104 sources_info (char *ignore, int from_tty)
3107 struct objfile *objfile;
3110 if (!have_full_symbols () && !have_partial_symbols ())
3112 error (_("No symbol table is loaded. Use the \"file\" command."));
3115 printf_filtered ("Source files for which symbols have been read in:\n\n");
3118 ALL_SYMTABS (objfile, s)
3120 const char *fullname = symtab_to_fullname (s);
3122 output_source_filename (fullname ? fullname : s->filename, &first);
3124 printf_filtered ("\n\n");
3126 printf_filtered ("Source files for which symbols "
3127 "will be read in on demand:\n\n");
3130 map_partial_symbol_filenames (output_partial_symbol_filename, &first,
3131 1 /*need_fullname*/);
3132 printf_filtered ("\n");
3136 file_matches (const char *file, char *files[], int nfiles)
3140 if (file != NULL && nfiles != 0)
3142 for (i = 0; i < nfiles; i++)
3144 if (filename_cmp (files[i], lbasename (file)) == 0)
3148 else if (nfiles == 0)
3153 /* Free any memory associated with a search. */
3156 free_search_symbols (struct symbol_search *symbols)
3158 struct symbol_search *p;
3159 struct symbol_search *next;
3161 for (p = symbols; p != NULL; p = next)
3169 do_free_search_symbols_cleanup (void *symbols)
3171 free_search_symbols (symbols);
3175 make_cleanup_free_search_symbols (struct symbol_search *symbols)
3177 return make_cleanup (do_free_search_symbols_cleanup, symbols);
3180 /* Helper function for sort_search_symbols and qsort. Can only
3181 sort symbols, not minimal symbols. */
3184 compare_search_syms (const void *sa, const void *sb)
3186 struct symbol_search **sym_a = (struct symbol_search **) sa;
3187 struct symbol_search **sym_b = (struct symbol_search **) sb;
3189 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
3190 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
3193 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3194 prevtail where it is, but update its next pointer to point to
3195 the first of the sorted symbols. */
3197 static struct symbol_search *
3198 sort_search_symbols (struct symbol_search *prevtail, int nfound)
3200 struct symbol_search **symbols, *symp, *old_next;
3203 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
3205 symp = prevtail->next;
3206 for (i = 0; i < nfound; i++)
3211 /* Generally NULL. */
3214 qsort (symbols, nfound, sizeof (struct symbol_search *),
3215 compare_search_syms);
3218 for (i = 0; i < nfound; i++)
3220 symp->next = symbols[i];
3223 symp->next = old_next;
3229 /* An object of this type is passed as the user_data to the
3230 expand_symtabs_matching method. */
3231 struct search_symbols_data
3236 /* It is true if PREG contains valid data, false otherwise. */
3237 unsigned preg_p : 1;
3241 /* A callback for expand_symtabs_matching. */
3244 search_symbols_file_matches (const char *filename, void *user_data)
3246 struct search_symbols_data *data = user_data;
3248 return file_matches (filename, data->files, data->nfiles);
3251 /* A callback for expand_symtabs_matching. */
3254 search_symbols_name_matches (const char *symname, void *user_data)
3256 struct search_symbols_data *data = user_data;
3258 return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0;
3261 /* Search the symbol table for matches to the regular expression REGEXP,
3262 returning the results in *MATCHES.
3264 Only symbols of KIND are searched:
3265 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3266 and constants (enums)
3267 FUNCTIONS_DOMAIN - search all functions
3268 TYPES_DOMAIN - search all type names
3269 ALL_DOMAIN - an internal error for this function
3271 free_search_symbols should be called when *MATCHES is no longer needed.
3273 The results are sorted locally; each symtab's global and static blocks are
3274 separately alphabetized. */
3277 search_symbols (char *regexp, enum search_domain kind,
3278 int nfiles, char *files[],
3279 struct symbol_search **matches)
3282 struct blockvector *bv;
3285 struct block_iterator iter;
3287 struct objfile *objfile;
3288 struct minimal_symbol *msymbol;
3290 static const enum minimal_symbol_type types[]
3291 = {mst_data, mst_text, mst_abs};
3292 static const enum minimal_symbol_type types2[]
3293 = {mst_bss, mst_file_text, mst_abs};
3294 static const enum minimal_symbol_type types3[]
3295 = {mst_file_data, mst_solib_trampoline, mst_abs};
3296 static const enum minimal_symbol_type types4[]
3297 = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
3298 enum minimal_symbol_type ourtype;
3299 enum minimal_symbol_type ourtype2;
3300 enum minimal_symbol_type ourtype3;
3301 enum minimal_symbol_type ourtype4;
3302 struct symbol_search *sr;
3303 struct symbol_search *psr;
3304 struct symbol_search *tail;
3305 struct search_symbols_data datum;
3307 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3308 CLEANUP_CHAIN is freed only in the case of an error. */
3309 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
3310 struct cleanup *retval_chain;
3312 gdb_assert (kind <= TYPES_DOMAIN);
3314 ourtype = types[kind];
3315 ourtype2 = types2[kind];
3316 ourtype3 = types3[kind];
3317 ourtype4 = types4[kind];
3319 sr = *matches = NULL;
3325 /* Make sure spacing is right for C++ operators.
3326 This is just a courtesy to make the matching less sensitive
3327 to how many spaces the user leaves between 'operator'
3328 and <TYPENAME> or <OPERATOR>. */
3330 char *opname = operator_chars (regexp, &opend);
3335 int fix = -1; /* -1 means ok; otherwise number of
3338 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3340 /* There should 1 space between 'operator' and 'TYPENAME'. */
3341 if (opname[-1] != ' ' || opname[-2] == ' ')
3346 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3347 if (opname[-1] == ' ')
3350 /* If wrong number of spaces, fix it. */
3353 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3355 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3360 errcode = regcomp (&datum.preg, regexp,
3361 REG_NOSUB | (case_sensitivity == case_sensitive_off
3365 char *err = get_regcomp_error (errcode, &datum.preg);
3367 make_cleanup (xfree, err);
3368 error (_("Invalid regexp (%s): %s"), err, regexp);
3371 make_regfree_cleanup (&datum.preg);
3374 /* Search through the partial symtabs *first* for all symbols
3375 matching the regexp. That way we don't have to reproduce all of
3376 the machinery below. */
3378 datum.nfiles = nfiles;
3379 datum.files = files;
3380 ALL_OBJFILES (objfile)
3383 objfile->sf->qf->expand_symtabs_matching (objfile,
3386 : search_symbols_file_matches),
3387 search_symbols_name_matches,
3392 retval_chain = old_chain;
3394 /* Here, we search through the minimal symbol tables for functions
3395 and variables that match, and force their symbols to be read.
3396 This is in particular necessary for demangled variable names,
3397 which are no longer put into the partial symbol tables.
3398 The symbol will then be found during the scan of symtabs below.
3400 For functions, find_pc_symtab should succeed if we have debug info
3401 for the function, for variables we have to call lookup_symbol
3402 to determine if the variable has debug info.
3403 If the lookup fails, set found_misc so that we will rescan to print
3404 any matching symbols without debug info. */
3406 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3408 ALL_MSYMBOLS (objfile, msymbol)
3412 if (MSYMBOL_TYPE (msymbol) == ourtype
3413 || MSYMBOL_TYPE (msymbol) == ourtype2
3414 || MSYMBOL_TYPE (msymbol) == ourtype3
3415 || MSYMBOL_TYPE (msymbol) == ourtype4)
3418 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3421 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
3423 /* FIXME: carlton/2003-02-04: Given that the
3424 semantics of lookup_symbol keeps on changing
3425 slightly, it would be a nice idea if we had a
3426 function lookup_symbol_minsym that found the
3427 symbol associated to a given minimal symbol (if
3429 if (kind == FUNCTIONS_DOMAIN
3430 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
3431 (struct block *) NULL,
3441 ALL_PRIMARY_SYMTABS (objfile, s)
3443 bv = BLOCKVECTOR (s);
3444 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3446 struct symbol_search *prevtail = tail;
3449 b = BLOCKVECTOR_BLOCK (bv, i);
3450 ALL_BLOCK_SYMBOLS (b, iter, sym)
3452 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3456 if (file_matches (real_symtab->filename, files, nfiles)
3458 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0,
3460 && ((kind == VARIABLES_DOMAIN
3461 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3462 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
3463 && SYMBOL_CLASS (sym) != LOC_BLOCK
3464 /* LOC_CONST can be used for more than just enums,
3465 e.g., c++ static const members.
3466 We only want to skip enums here. */
3467 && !(SYMBOL_CLASS (sym) == LOC_CONST
3468 && TYPE_CODE (SYMBOL_TYPE (sym))
3470 || (kind == FUNCTIONS_DOMAIN
3471 && SYMBOL_CLASS (sym) == LOC_BLOCK)
3472 || (kind == TYPES_DOMAIN
3473 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
3476 psr = (struct symbol_search *)
3477 xmalloc (sizeof (struct symbol_search));
3479 psr->symtab = real_symtab;
3481 psr->msymbol = NULL;
3493 if (prevtail == NULL)
3495 struct symbol_search dummy;
3498 tail = sort_search_symbols (&dummy, nfound);
3501 make_cleanup_free_search_symbols (sr);
3504 tail = sort_search_symbols (prevtail, nfound);
3509 /* If there are no eyes, avoid all contact. I mean, if there are
3510 no debug symbols, then print directly from the msymbol_vector. */
3512 if (found_misc || kind != FUNCTIONS_DOMAIN)
3514 ALL_MSYMBOLS (objfile, msymbol)
3518 if (MSYMBOL_TYPE (msymbol) == ourtype
3519 || MSYMBOL_TYPE (msymbol) == ourtype2
3520 || MSYMBOL_TYPE (msymbol) == ourtype3
3521 || MSYMBOL_TYPE (msymbol) == ourtype4)
3524 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3527 /* Functions: Look up by address. */
3528 if (kind != FUNCTIONS_DOMAIN ||
3529 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
3531 /* Variables/Absolutes: Look up by name. */
3532 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
3533 (struct block *) NULL, VAR_DOMAIN, 0)
3537 psr = (struct symbol_search *)
3538 xmalloc (sizeof (struct symbol_search));
3540 psr->msymbol = msymbol;
3547 make_cleanup_free_search_symbols (sr);
3559 discard_cleanups (retval_chain);
3560 do_cleanups (old_chain);
3564 /* Helper function for symtab_symbol_info, this function uses
3565 the data returned from search_symbols() to print information
3566 regarding the match to gdb_stdout. */
3569 print_symbol_info (enum search_domain kind,
3570 struct symtab *s, struct symbol *sym,
3571 int block, char *last)
3573 if (last == NULL || filename_cmp (last, s->filename) != 0)
3575 fputs_filtered ("\nFile ", gdb_stdout);
3576 fputs_filtered (s->filename, gdb_stdout);
3577 fputs_filtered (":\n", gdb_stdout);
3580 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3581 printf_filtered ("static ");
3583 /* Typedef that is not a C++ class. */
3584 if (kind == TYPES_DOMAIN
3585 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3586 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3587 /* variable, func, or typedef-that-is-c++-class. */
3588 else if (kind < TYPES_DOMAIN
3589 || (kind == TYPES_DOMAIN
3590 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3592 type_print (SYMBOL_TYPE (sym),
3593 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3594 ? "" : SYMBOL_PRINT_NAME (sym)),
3597 printf_filtered (";\n");
3601 /* This help function for symtab_symbol_info() prints information
3602 for non-debugging symbols to gdb_stdout. */
3605 print_msymbol_info (struct minimal_symbol *msymbol)
3607 struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
3610 if (gdbarch_addr_bit (gdbarch) <= 32)
3611 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3612 & (CORE_ADDR) 0xffffffff,
3615 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3617 printf_filtered ("%s %s\n",
3618 tmp, SYMBOL_PRINT_NAME (msymbol));
3621 /* This is the guts of the commands "info functions", "info types", and
3622 "info variables". It calls search_symbols to find all matches and then
3623 print_[m]symbol_info to print out some useful information about the
3627 symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty)
3629 static const char * const classnames[] =
3630 {"variable", "function", "type"};
3631 struct symbol_search *symbols;
3632 struct symbol_search *p;
3633 struct cleanup *old_chain;
3634 char *last_filename = NULL;
3637 gdb_assert (kind <= TYPES_DOMAIN);
3639 /* Must make sure that if we're interrupted, symbols gets freed. */
3640 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3641 old_chain = make_cleanup_free_search_symbols (symbols);
3643 printf_filtered (regexp
3644 ? "All %ss matching regular expression \"%s\":\n"
3645 : "All defined %ss:\n",
3646 classnames[kind], regexp);
3648 for (p = symbols; p != NULL; p = p->next)
3652 if (p->msymbol != NULL)
3656 printf_filtered ("\nNon-debugging symbols:\n");
3659 print_msymbol_info (p->msymbol);
3663 print_symbol_info (kind,
3668 last_filename = p->symtab->filename;
3672 do_cleanups (old_chain);
3676 variables_info (char *regexp, int from_tty)
3678 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3682 functions_info (char *regexp, int from_tty)
3684 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3689 types_info (char *regexp, int from_tty)
3691 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3694 /* Breakpoint all functions matching regular expression. */
3697 rbreak_command_wrapper (char *regexp, int from_tty)
3699 rbreak_command (regexp, from_tty);
3702 /* A cleanup function that calls end_rbreak_breakpoints. */
3705 do_end_rbreak_breakpoints (void *ignore)
3707 end_rbreak_breakpoints ();
3711 rbreak_command (char *regexp, int from_tty)
3713 struct symbol_search *ss;
3714 struct symbol_search *p;
3715 struct cleanup *old_chain;
3716 char *string = NULL;
3718 char **files = NULL, *file_name;
3723 char *colon = strchr (regexp, ':');
3725 if (colon && *(colon + 1) != ':')
3729 colon_index = colon - regexp;
3730 file_name = alloca (colon_index + 1);
3731 memcpy (file_name, regexp, colon_index);
3732 file_name[colon_index--] = 0;
3733 while (isspace (file_name[colon_index]))
3734 file_name[colon_index--] = 0;
3738 while (isspace (*regexp)) regexp++;
3742 search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss);
3743 old_chain = make_cleanup_free_search_symbols (ss);
3744 make_cleanup (free_current_contents, &string);
3746 start_rbreak_breakpoints ();
3747 make_cleanup (do_end_rbreak_breakpoints, NULL);
3748 for (p = ss; p != NULL; p = p->next)
3750 if (p->msymbol == NULL)
3752 int newlen = (strlen (p->symtab->filename)
3753 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3758 string = xrealloc (string, newlen);
3761 strcpy (string, p->symtab->filename);
3762 strcat (string, ":'");
3763 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3764 strcat (string, "'");
3765 break_command (string, from_tty);
3766 print_symbol_info (FUNCTIONS_DOMAIN,
3770 p->symtab->filename);
3774 int newlen = (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) + 3);
3778 string = xrealloc (string, newlen);
3781 strcpy (string, "'");
3782 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3783 strcat (string, "'");
3785 break_command (string, from_tty);
3786 printf_filtered ("<function, no debug info> %s;\n",
3787 SYMBOL_PRINT_NAME (p->msymbol));
3791 do_cleanups (old_chain);
3795 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3797 Either sym_text[sym_text_len] != '(' and then we search for any
3798 symbol starting with SYM_TEXT text.
3800 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3801 be terminated at that point. Partial symbol tables do not have parameters
3805 compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
3807 int (*ncmp) (const char *, const char *, size_t);
3809 ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp);
3811 if (ncmp (name, sym_text, sym_text_len) != 0)
3814 if (sym_text[sym_text_len] == '(')
3816 /* User searches for `name(someth...'. Require NAME to be terminated.
3817 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3818 present but accept even parameters presence. In this case this
3819 function is in fact strcmp_iw but whitespace skipping is not supported
3820 for tab completion. */
3822 if (name[sym_text_len] != '\0' && name[sym_text_len] != '(')
3829 /* Free any memory associated with a completion list. */
3832 free_completion_list (char ***list_ptr)
3835 char **list = *list_ptr;
3837 while (list[i] != NULL)
3845 /* Callback for make_cleanup. */
3848 do_free_completion_list (void *list)
3850 free_completion_list (list);
3853 /* Helper routine for make_symbol_completion_list. */
3855 static int return_val_size;
3856 static int return_val_index;
3857 static char **return_val;
3859 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3860 completion_list_add_name \
3861 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3863 /* Test to see if the symbol specified by SYMNAME (which is already
3864 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3865 characters. If so, add it to the current completion list. */
3868 completion_list_add_name (const char *symname,
3869 const char *sym_text, int sym_text_len,
3870 const char *text, const char *word)
3874 /* Clip symbols that cannot match. */
3875 if (!compare_symbol_name (symname, sym_text, sym_text_len))
3878 /* We have a match for a completion, so add SYMNAME to the current list
3879 of matches. Note that the name is moved to freshly malloc'd space. */
3884 if (word == sym_text)
3886 new = xmalloc (strlen (symname) + 5);
3887 strcpy (new, symname);
3889 else if (word > sym_text)
3891 /* Return some portion of symname. */
3892 new = xmalloc (strlen (symname) + 5);
3893 strcpy (new, symname + (word - sym_text));
3897 /* Return some of SYM_TEXT plus symname. */
3898 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
3899 strncpy (new, word, sym_text - word);
3900 new[sym_text - word] = '\0';
3901 strcat (new, symname);
3904 if (return_val_index + 3 > return_val_size)
3906 newsize = (return_val_size *= 2) * sizeof (char *);
3907 return_val = (char **) xrealloc ((char *) return_val, newsize);
3909 return_val[return_val_index++] = new;
3910 return_val[return_val_index] = NULL;
3914 /* ObjC: In case we are completing on a selector, look as the msymbol
3915 again and feed all the selectors into the mill. */
3918 completion_list_objc_symbol (struct minimal_symbol *msymbol,
3919 const char *sym_text, int sym_text_len,
3920 const char *text, const char *word)
3922 static char *tmp = NULL;
3923 static unsigned int tmplen = 0;
3925 const char *method, *category, *selector;
3928 method = SYMBOL_NATURAL_NAME (msymbol);
3930 /* Is it a method? */
3931 if ((method[0] != '-') && (method[0] != '+'))
3934 if (sym_text[0] == '[')
3935 /* Complete on shortened method method. */
3936 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
3938 while ((strlen (method) + 1) >= tmplen)
3944 tmp = xrealloc (tmp, tmplen);
3946 selector = strchr (method, ' ');
3947 if (selector != NULL)
3950 category = strchr (method, '(');
3952 if ((category != NULL) && (selector != NULL))
3954 memcpy (tmp, method, (category - method));
3955 tmp[category - method] = ' ';
3956 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
3957 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3958 if (sym_text[0] == '[')
3959 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
3962 if (selector != NULL)
3964 /* Complete on selector only. */
3965 strcpy (tmp, selector);
3966 tmp2 = strchr (tmp, ']');
3970 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3974 /* Break the non-quoted text based on the characters which are in
3975 symbols. FIXME: This should probably be language-specific. */
3978 language_search_unquoted_string (char *text, char *p)
3980 for (; p > text; --p)
3982 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3986 if ((current_language->la_language == language_objc))
3988 if (p[-1] == ':') /* Might be part of a method name. */
3990 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
3991 p -= 2; /* Beginning of a method name. */
3992 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
3993 { /* Might be part of a method name. */
3996 /* Seeing a ' ' or a '(' is not conclusive evidence
3997 that we are in the middle of a method name. However,
3998 finding "-[" or "+[" should be pretty un-ambiguous.
3999 Unfortunately we have to find it now to decide. */
4002 if (isalnum (t[-1]) || t[-1] == '_' ||
4003 t[-1] == ' ' || t[-1] == ':' ||
4004 t[-1] == '(' || t[-1] == ')')
4009 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
4010 p = t - 2; /* Method name detected. */
4011 /* Else we leave with p unchanged. */
4021 completion_list_add_fields (struct symbol *sym, char *sym_text,
4022 int sym_text_len, char *text, char *word)
4024 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4026 struct type *t = SYMBOL_TYPE (sym);
4027 enum type_code c = TYPE_CODE (t);
4030 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
4031 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
4032 if (TYPE_FIELD_NAME (t, j))
4033 completion_list_add_name (TYPE_FIELD_NAME (t, j),
4034 sym_text, sym_text_len, text, word);
4038 /* Type of the user_data argument passed to add_macro_name or
4039 expand_partial_symbol_name. The contents are simply whatever is
4040 needed by completion_list_add_name. */
4041 struct add_name_data
4049 /* A callback used with macro_for_each and macro_for_each_in_scope.
4050 This adds a macro's name to the current completion list. */
4053 add_macro_name (const char *name, const struct macro_definition *ignore,
4054 struct macro_source_file *ignore2, int ignore3,
4057 struct add_name_data *datum = (struct add_name_data *) user_data;
4059 completion_list_add_name ((char *) name,
4060 datum->sym_text, datum->sym_text_len,
4061 datum->text, datum->word);
4064 /* A callback for expand_partial_symbol_names. */
4067 expand_partial_symbol_name (const char *name, void *user_data)
4069 struct add_name_data *datum = (struct add_name_data *) user_data;
4071 return compare_symbol_name (name, datum->sym_text, datum->sym_text_len);
4075 default_make_symbol_completion_list_break_on (char *text, char *word,
4076 const char *break_on)
4078 /* Problem: All of the symbols have to be copied because readline
4079 frees them. I'm not going to worry about this; hopefully there
4080 won't be that many. */
4084 struct minimal_symbol *msymbol;
4085 struct objfile *objfile;
4087 const struct block *surrounding_static_block, *surrounding_global_block;
4088 struct block_iterator iter;
4089 /* The symbol we are completing on. Points in same buffer as text. */
4091 /* Length of sym_text. */
4093 struct add_name_data datum;
4094 struct cleanup *back_to;
4096 /* Now look for the symbol we are supposed to complete on. */
4100 char *quote_pos = NULL;
4102 /* First see if this is a quoted string. */
4104 for (p = text; *p != '\0'; ++p)
4106 if (quote_found != '\0')
4108 if (*p == quote_found)
4109 /* Found close quote. */
4111 else if (*p == '\\' && p[1] == quote_found)
4112 /* A backslash followed by the quote character
4113 doesn't end the string. */
4116 else if (*p == '\'' || *p == '"')
4122 if (quote_found == '\'')
4123 /* A string within single quotes can be a symbol, so complete on it. */
4124 sym_text = quote_pos + 1;
4125 else if (quote_found == '"')
4126 /* A double-quoted string is never a symbol, nor does it make sense
4127 to complete it any other way. */
4129 return_val = (char **) xmalloc (sizeof (char *));
4130 return_val[0] = NULL;
4135 /* It is not a quoted string. Break it based on the characters
4136 which are in symbols. */
4139 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
4140 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
4149 sym_text_len = strlen (sym_text);
4151 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4153 if (current_language->la_language == language_cplus
4154 || current_language->la_language == language_java
4155 || current_language->la_language == language_fortran)
4157 /* These languages may have parameters entered by user but they are never
4158 present in the partial symbol tables. */
4160 const char *cs = memchr (sym_text, '(', sym_text_len);
4163 sym_text_len = cs - sym_text;
4165 gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
4167 return_val_size = 100;
4168 return_val_index = 0;
4169 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
4170 return_val[0] = NULL;
4171 back_to = make_cleanup (do_free_completion_list, &return_val);
4173 datum.sym_text = sym_text;
4174 datum.sym_text_len = sym_text_len;
4178 /* Look through the partial symtabs for all symbols which begin
4179 by matching SYM_TEXT. Expand all CUs that you find to the list.
4180 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4181 expand_partial_symbol_names (expand_partial_symbol_name, &datum);
4183 /* At this point scan through the misc symbol vectors and add each
4184 symbol you find to the list. Eventually we want to ignore
4185 anything that isn't a text symbol (everything else will be
4186 handled by the psymtab code above). */
4188 ALL_MSYMBOLS (objfile, msymbol)
4191 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
4193 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
4196 /* Search upwards from currently selected frame (so that we can
4197 complete on local vars). Also catch fields of types defined in
4198 this places which match our text string. Only complete on types
4199 visible from current context. */
4201 b = get_selected_block (0);
4202 surrounding_static_block = block_static_block (b);
4203 surrounding_global_block = block_global_block (b);
4204 if (surrounding_static_block != NULL)
4205 while (b != surrounding_static_block)
4209 ALL_BLOCK_SYMBOLS (b, iter, sym)
4211 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4213 completion_list_add_fields (sym, sym_text, sym_text_len, text,
4217 /* Stop when we encounter an enclosing function. Do not stop for
4218 non-inlined functions - the locals of the enclosing function
4219 are in scope for a nested function. */
4220 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
4222 b = BLOCK_SUPERBLOCK (b);
4225 /* Add fields from the file's types; symbols will be added below. */
4227 if (surrounding_static_block != NULL)
4228 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
4229 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4231 if (surrounding_global_block != NULL)
4232 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
4233 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4235 /* Go through the symtabs and check the externs and statics for
4236 symbols which match. */
4238 ALL_PRIMARY_SYMTABS (objfile, s)
4241 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4242 ALL_BLOCK_SYMBOLS (b, iter, sym)
4244 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4248 ALL_PRIMARY_SYMTABS (objfile, s)
4251 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4252 ALL_BLOCK_SYMBOLS (b, iter, sym)
4254 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4258 if (current_language->la_macro_expansion == macro_expansion_c)
4260 struct macro_scope *scope;
4262 /* Add any macros visible in the default scope. Note that this
4263 may yield the occasional wrong result, because an expression
4264 might be evaluated in a scope other than the default. For
4265 example, if the user types "break file:line if <TAB>", the
4266 resulting expression will be evaluated at "file:line" -- but
4267 at there does not seem to be a way to detect this at
4269 scope = default_macro_scope ();
4272 macro_for_each_in_scope (scope->file, scope->line,
4273 add_macro_name, &datum);
4277 /* User-defined macros are always visible. */
4278 macro_for_each (macro_user_macros, add_macro_name, &datum);
4281 discard_cleanups (back_to);
4282 return (return_val);
4286 default_make_symbol_completion_list (char *text, char *word)
4288 return default_make_symbol_completion_list_break_on (text, word, "");
4291 /* Return a NULL terminated array of all symbols (regardless of class)
4292 which begin by matching TEXT. If the answer is no symbols, then
4293 the return value is an array which contains only a NULL pointer. */
4296 make_symbol_completion_list (char *text, char *word)
4298 return current_language->la_make_symbol_completion_list (text, word);
4301 /* Like make_symbol_completion_list, but suitable for use as a
4302 completion function. */
4305 make_symbol_completion_list_fn (struct cmd_list_element *ignore,
4306 char *text, char *word)
4308 return make_symbol_completion_list (text, word);
4311 /* Like make_symbol_completion_list, but returns a list of symbols
4312 defined in a source file FILE. */
4315 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
4320 struct block_iterator iter;
4321 /* The symbol we are completing on. Points in same buffer as text. */
4323 /* Length of sym_text. */
4326 /* Now look for the symbol we are supposed to complete on.
4327 FIXME: This should be language-specific. */
4331 char *quote_pos = NULL;
4333 /* First see if this is a quoted string. */
4335 for (p = text; *p != '\0'; ++p)
4337 if (quote_found != '\0')
4339 if (*p == quote_found)
4340 /* Found close quote. */
4342 else if (*p == '\\' && p[1] == quote_found)
4343 /* A backslash followed by the quote character
4344 doesn't end the string. */
4347 else if (*p == '\'' || *p == '"')
4353 if (quote_found == '\'')
4354 /* A string within single quotes can be a symbol, so complete on it. */
4355 sym_text = quote_pos + 1;
4356 else if (quote_found == '"')
4357 /* A double-quoted string is never a symbol, nor does it make sense
4358 to complete it any other way. */
4360 return_val = (char **) xmalloc (sizeof (char *));
4361 return_val[0] = NULL;
4366 /* Not a quoted string. */
4367 sym_text = language_search_unquoted_string (text, p);
4371 sym_text_len = strlen (sym_text);
4373 return_val_size = 10;
4374 return_val_index = 0;
4375 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
4376 return_val[0] = NULL;
4378 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4380 s = lookup_symtab (srcfile);
4383 /* Maybe they typed the file with leading directories, while the
4384 symbol tables record only its basename. */
4385 const char *tail = lbasename (srcfile);
4388 s = lookup_symtab (tail);
4391 /* If we have no symtab for that file, return an empty list. */
4393 return (return_val);
4395 /* Go through this symtab and check the externs and statics for
4396 symbols which match. */
4398 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4399 ALL_BLOCK_SYMBOLS (b, iter, sym)
4401 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4404 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4405 ALL_BLOCK_SYMBOLS (b, iter, sym)
4407 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4410 return (return_val);
4413 /* A helper function for make_source_files_completion_list. It adds
4414 another file name to a list of possible completions, growing the
4415 list as necessary. */
4418 add_filename_to_list (const char *fname, char *text, char *word,
4419 char ***list, int *list_used, int *list_alloced)
4422 size_t fnlen = strlen (fname);
4424 if (*list_used + 1 >= *list_alloced)
4427 *list = (char **) xrealloc ((char *) *list,
4428 *list_alloced * sizeof (char *));
4433 /* Return exactly fname. */
4434 new = xmalloc (fnlen + 5);
4435 strcpy (new, fname);
4437 else if (word > text)
4439 /* Return some portion of fname. */
4440 new = xmalloc (fnlen + 5);
4441 strcpy (new, fname + (word - text));
4445 /* Return some of TEXT plus fname. */
4446 new = xmalloc (fnlen + (text - word) + 5);
4447 strncpy (new, word, text - word);
4448 new[text - word] = '\0';
4449 strcat (new, fname);
4451 (*list)[*list_used] = new;
4452 (*list)[++*list_used] = NULL;
4456 not_interesting_fname (const char *fname)
4458 static const char *illegal_aliens[] = {
4459 "_globals_", /* inserted by coff_symtab_read */
4464 for (i = 0; illegal_aliens[i]; i++)
4466 if (filename_cmp (fname, illegal_aliens[i]) == 0)
4472 /* An object of this type is passed as the user_data argument to
4473 map_partial_symbol_filenames. */
4474 struct add_partial_filename_data
4485 /* A callback for map_partial_symbol_filenames. */
4488 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
4491 struct add_partial_filename_data *data = user_data;
4493 if (not_interesting_fname (filename))
4495 if (!filename_seen (filename, 1, data->first)
4496 && filename_ncmp (filename, data->text, data->text_len) == 0)
4498 /* This file matches for a completion; add it to the
4499 current list of matches. */
4500 add_filename_to_list (filename, data->text, data->word,
4501 data->list, data->list_used, data->list_alloced);
4505 const char *base_name = lbasename (filename);
4507 if (base_name != filename
4508 && !filename_seen (base_name, 1, data->first)
4509 && filename_ncmp (base_name, data->text, data->text_len) == 0)
4510 add_filename_to_list (base_name, data->text, data->word,
4511 data->list, data->list_used, data->list_alloced);
4515 /* Return a NULL terminated array of all source files whose names
4516 begin with matching TEXT. The file names are looked up in the
4517 symbol tables of this program. If the answer is no matchess, then
4518 the return value is an array which contains only a NULL pointer. */
4521 make_source_files_completion_list (char *text, char *word)
4524 struct objfile *objfile;
4526 int list_alloced = 1;
4528 size_t text_len = strlen (text);
4529 char **list = (char **) xmalloc (list_alloced * sizeof (char *));
4530 const char *base_name;
4531 struct add_partial_filename_data datum;
4532 struct cleanup *back_to;
4536 if (!have_full_symbols () && !have_partial_symbols ())
4539 back_to = make_cleanup (do_free_completion_list, &list);
4541 ALL_SYMTABS (objfile, s)
4543 if (not_interesting_fname (s->filename))
4545 if (!filename_seen (s->filename, 1, &first)
4546 && filename_ncmp (s->filename, text, text_len) == 0)
4548 /* This file matches for a completion; add it to the current
4550 add_filename_to_list (s->filename, text, word,
4551 &list, &list_used, &list_alloced);
4555 /* NOTE: We allow the user to type a base name when the
4556 debug info records leading directories, but not the other
4557 way around. This is what subroutines of breakpoint
4558 command do when they parse file names. */
4559 base_name = lbasename (s->filename);
4560 if (base_name != s->filename
4561 && !filename_seen (base_name, 1, &first)
4562 && filename_ncmp (base_name, text, text_len) == 0)
4563 add_filename_to_list (base_name, text, word,
4564 &list, &list_used, &list_alloced);
4568 datum.first = &first;
4571 datum.text_len = text_len;
4573 datum.list_used = &list_used;
4574 datum.list_alloced = &list_alloced;
4575 map_partial_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
4576 0 /*need_fullname*/);
4577 discard_cleanups (back_to);
4582 /* Determine if PC is in the prologue of a function. The prologue is the area
4583 between the first instruction of a function, and the first executable line.
4584 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4586 If non-zero, func_start is where we think the prologue starts, possibly
4587 by previous examination of symbol table information. */
4590 in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
4592 struct symtab_and_line sal;
4593 CORE_ADDR func_addr, func_end;
4595 /* We have several sources of information we can consult to figure
4597 - Compilers usually emit line number info that marks the prologue
4598 as its own "source line". So the ending address of that "line"
4599 is the end of the prologue. If available, this is the most
4601 - The minimal symbols and partial symbols, which can usually tell
4602 us the starting and ending addresses of a function.
4603 - If we know the function's start address, we can call the
4604 architecture-defined gdbarch_skip_prologue function to analyze the
4605 instruction stream and guess where the prologue ends.
4606 - Our `func_start' argument; if non-zero, this is the caller's
4607 best guess as to the function's entry point. At the time of
4608 this writing, handle_inferior_event doesn't get this right, so
4609 it should be our last resort. */
4611 /* Consult the partial symbol table, to find which function
4613 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4615 CORE_ADDR prologue_end;
4617 /* We don't even have minsym information, so fall back to using
4618 func_start, if given. */
4620 return 1; /* We *might* be in a prologue. */
4622 prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
4624 return func_start <= pc && pc < prologue_end;
4627 /* If we have line number information for the function, that's
4628 usually pretty reliable. */
4629 sal = find_pc_line (func_addr, 0);
4631 /* Now sal describes the source line at the function's entry point,
4632 which (by convention) is the prologue. The end of that "line",
4633 sal.end, is the end of the prologue.
4635 Note that, for functions whose source code is all on a single
4636 line, the line number information doesn't always end up this way.
4637 So we must verify that our purported end-of-prologue address is
4638 *within* the function, not at its start or end. */
4640 || sal.end <= func_addr
4641 || func_end <= sal.end)
4643 /* We don't have any good line number info, so use the minsym
4644 information, together with the architecture-specific prologue
4646 CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
4648 return func_addr <= pc && pc < prologue_end;
4651 /* We have line number info, and it looks good. */
4652 return func_addr <= pc && pc < sal.end;
4655 /* Given PC at the function's start address, attempt to find the
4656 prologue end using SAL information. Return zero if the skip fails.
4658 A non-optimized prologue traditionally has one SAL for the function
4659 and a second for the function body. A single line function has
4660 them both pointing at the same line.
4662 An optimized prologue is similar but the prologue may contain
4663 instructions (SALs) from the instruction body. Need to skip those
4664 while not getting into the function body.
4666 The functions end point and an increasing SAL line are used as
4667 indicators of the prologue's endpoint.
4669 This code is based on the function refine_prologue_limit
4673 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
4675 struct symtab_and_line prologue_sal;
4680 /* Get an initial range for the function. */
4681 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4682 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
4684 prologue_sal = find_pc_line (start_pc, 0);
4685 if (prologue_sal.line != 0)
4687 /* For languages other than assembly, treat two consecutive line
4688 entries at the same address as a zero-instruction prologue.
4689 The GNU assembler emits separate line notes for each instruction
4690 in a multi-instruction macro, but compilers generally will not
4692 if (prologue_sal.symtab->language != language_asm)
4694 struct linetable *linetable = LINETABLE (prologue_sal.symtab);
4697 /* Skip any earlier lines, and any end-of-sequence marker
4698 from a previous function. */
4699 while (linetable->item[idx].pc != prologue_sal.pc
4700 || linetable->item[idx].line == 0)
4703 if (idx+1 < linetable->nitems
4704 && linetable->item[idx+1].line != 0
4705 && linetable->item[idx+1].pc == start_pc)
4709 /* If there is only one sal that covers the entire function,
4710 then it is probably a single line function, like
4712 if (prologue_sal.end >= end_pc)
4715 while (prologue_sal.end < end_pc)
4717 struct symtab_and_line sal;
4719 sal = find_pc_line (prologue_sal.end, 0);
4722 /* Assume that a consecutive SAL for the same (or larger)
4723 line mark the prologue -> body transition. */
4724 if (sal.line >= prologue_sal.line)
4727 /* The line number is smaller. Check that it's from the
4728 same function, not something inlined. If it's inlined,
4729 then there is no point comparing the line numbers. */
4730 bl = block_for_pc (prologue_sal.end);
4733 if (block_inlined_p (bl))
4735 if (BLOCK_FUNCTION (bl))
4740 bl = BLOCK_SUPERBLOCK (bl);
4745 /* The case in which compiler's optimizer/scheduler has
4746 moved instructions into the prologue. We look ahead in
4747 the function looking for address ranges whose
4748 corresponding line number is less the first one that we
4749 found for the function. This is more conservative then
4750 refine_prologue_limit which scans a large number of SALs
4751 looking for any in the prologue. */
4756 if (prologue_sal.end < end_pc)
4757 /* Return the end of this line, or zero if we could not find a
4759 return prologue_sal.end;
4761 /* Don't return END_PC, which is past the end of the function. */
4762 return prologue_sal.pc;
4765 struct symtabs_and_lines
4766 decode_line_spec (char *string, int flags)
4768 struct symtabs_and_lines sals;
4769 struct symtab_and_line cursal;
4772 error (_("Empty line specification."));
4774 /* We use whatever is set as the current source line. We do not try
4775 and get a default or it will recursively call us! */
4776 cursal = get_current_source_symtab_and_line ();
4778 sals = decode_line_1 (&string, flags,
4779 cursal.symtab, cursal.line);
4782 error (_("Junk at end of line specification: %s"), string);
4787 static char *name_of_main;
4788 enum language language_of_main = language_unknown;
4791 set_main_name (const char *name)
4793 if (name_of_main != NULL)
4795 xfree (name_of_main);
4796 name_of_main = NULL;
4797 language_of_main = language_unknown;
4801 name_of_main = xstrdup (name);
4802 language_of_main = language_unknown;
4806 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4810 find_main_name (void)
4812 const char *new_main_name;
4814 /* Try to see if the main procedure is in Ada. */
4815 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4816 be to add a new method in the language vector, and call this
4817 method for each language until one of them returns a non-empty
4818 name. This would allow us to remove this hard-coded call to
4819 an Ada function. It is not clear that this is a better approach
4820 at this point, because all methods need to be written in a way
4821 such that false positives never be returned. For instance, it is
4822 important that a method does not return a wrong name for the main
4823 procedure if the main procedure is actually written in a different
4824 language. It is easy to guaranty this with Ada, since we use a
4825 special symbol generated only when the main in Ada to find the name
4826 of the main procedure. It is difficult however to see how this can
4827 be guarantied for languages such as C, for instance. This suggests
4828 that order of call for these methods becomes important, which means
4829 a more complicated approach. */
4830 new_main_name = ada_main_name ();
4831 if (new_main_name != NULL)
4833 set_main_name (new_main_name);
4837 new_main_name = go_main_name ();
4838 if (new_main_name != NULL)
4840 set_main_name (new_main_name);
4844 new_main_name = pascal_main_name ();
4845 if (new_main_name != NULL)
4847 set_main_name (new_main_name);
4851 /* The languages above didn't identify the name of the main procedure.
4852 Fallback to "main". */
4853 set_main_name ("main");
4859 if (name_of_main == NULL)
4862 return name_of_main;
4865 /* Handle ``executable_changed'' events for the symtab module. */
4868 symtab_observer_executable_changed (void)
4870 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4871 set_main_name (NULL);
4874 /* Return 1 if the supplied producer string matches the ARM RealView
4875 compiler (armcc). */
4878 producer_is_realview (const char *producer)
4880 static const char *const arm_idents[] = {
4881 "ARM C Compiler, ADS",
4882 "Thumb C Compiler, ADS",
4883 "ARM C++ Compiler, ADS",
4884 "Thumb C++ Compiler, ADS",
4885 "ARM/Thumb C/C++ Compiler, RVCT",
4886 "ARM C/C++ Compiler, RVCT"
4890 if (producer == NULL)
4893 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
4894 if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0)
4901 _initialize_symtab (void)
4903 add_info ("variables", variables_info, _("\
4904 All global and static variable names, or those matching REGEXP."));
4906 add_com ("whereis", class_info, variables_info, _("\
4907 All global and static variable names, or those matching REGEXP."));
4909 add_info ("functions", functions_info,
4910 _("All function names, or those matching REGEXP."));
4912 /* FIXME: This command has at least the following problems:
4913 1. It prints builtin types (in a very strange and confusing fashion).
4914 2. It doesn't print right, e.g. with
4915 typedef struct foo *FOO
4916 type_print prints "FOO" when we want to make it (in this situation)
4917 print "struct foo *".
4918 I also think "ptype" or "whatis" is more likely to be useful (but if
4919 there is much disagreement "info types" can be fixed). */
4920 add_info ("types", types_info,
4921 _("All type names, or those matching REGEXP."));
4923 add_info ("sources", sources_info,
4924 _("Source files in the program."));
4926 add_com ("rbreak", class_breakpoint, rbreak_command,
4927 _("Set a breakpoint for all functions matching REGEXP."));
4931 add_com ("lf", class_info, sources_info,
4932 _("Source files in the program"));
4933 add_com ("lg", class_info, variables_info, _("\
4934 All global and static variable names, or those matching REGEXP."));
4937 add_setshow_enum_cmd ("multiple-symbols", no_class,
4938 multiple_symbols_modes, &multiple_symbols_mode,
4940 Set the debugger behavior when more than one symbol are possible matches\n\
4941 in an expression."), _("\
4942 Show how the debugger handles ambiguities in expressions."), _("\
4943 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4944 NULL, NULL, &setlist, &showlist);
4946 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
4947 &basenames_may_differ, _("\
4948 Set whether a source file may have multiple base names."), _("\
4949 Show whether a source file may have multiple base names."), _("\
4950 (A \"base name\" is the name of a file with the directory part removed.\n\
4951 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
4952 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
4953 before comparing them. Canonicalization is an expensive operation,\n\
4954 but it allows the same file be known by more than one base name.\n\
4955 If not set (the default), all source files are assumed to have just\n\
4956 one base name, and gdb will do file name comparisons more efficiently."),
4958 &setlist, &showlist);
4960 observer_attach_executable_changed (symtab_observer_executable_changed);