1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "gdb_regex.h"
31 #include "expression.h"
36 #include "filenames.h" /* for FILENAME_CMP */
37 #include "objc-lang.h"
43 #include "cli/cli-utils.h"
47 #include "gdb_obstack.h"
49 #include "dictionary.h"
51 #include <sys/types.h>
53 #include "gdb_string.h"
57 #include "cp-support.h"
59 #include "gdb_assert.h"
62 #include "macroscope.h"
65 #include "parser-defs.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 int find_line_common (struct linetable *, int, int *, int);
81 static struct symbol *lookup_symbol_aux (const char *name,
82 const struct block *block,
83 const domain_enum domain,
84 enum language language,
85 struct field_of_this_result *is_a_field_of_this);
88 struct symbol *lookup_symbol_aux_local (const char *name,
89 const struct block *block,
90 const domain_enum domain,
91 enum language language);
94 struct symbol *lookup_symbol_aux_symtabs (int block_index,
96 const domain_enum domain);
99 struct symbol *lookup_symbol_aux_quick (struct objfile *objfile,
102 const domain_enum domain);
104 static void print_msymbol_info (struct minimal_symbol *);
106 void _initialize_symtab (void);
110 /* When non-zero, print debugging messages related to symtab creation. */
111 int symtab_create_debug = 0;
113 /* Non-zero if a file may be known by two different basenames.
114 This is the uncommon case, and significantly slows down gdb.
115 Default set to "off" to not slow down the common case. */
116 int basenames_may_differ = 0;
118 /* Allow the user to configure the debugger behavior with respect
119 to multiple-choice menus when more than one symbol matches during
122 const char multiple_symbols_ask[] = "ask";
123 const char multiple_symbols_all[] = "all";
124 const char multiple_symbols_cancel[] = "cancel";
125 static const char *const multiple_symbols_modes[] =
127 multiple_symbols_ask,
128 multiple_symbols_all,
129 multiple_symbols_cancel,
132 static const char *multiple_symbols_mode = multiple_symbols_all;
134 /* Read-only accessor to AUTO_SELECT_MODE. */
137 multiple_symbols_select_mode (void)
139 return multiple_symbols_mode;
142 /* Block in which the most recently searched-for symbol was found.
143 Might be better to make this a parameter to lookup_symbol and
146 const struct block *block_found;
148 /* See whether FILENAME matches SEARCH_NAME using the rule that we
149 advertise to the user. (The manual's description of linespecs
150 describes what we advertise). Returns true if they match, false
154 compare_filenames_for_search (const char *filename, const char *search_name)
156 int len = strlen (filename);
157 size_t search_len = strlen (search_name);
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
170 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
171 cannot match FILENAME "/path//dir/file.c" - as user has requested
172 absolute path. The sama applies for "c:\file.c" possibly
173 incorrectly hypothetically matching "d:\dir\c:\file.c".
175 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
176 compatible with SEARCH_NAME "file.c". In such case a compiler had
177 to put the "c:file.c" name into debug info. Such compatibility
178 works only on GDB built for DOS host. */
179 return (len == search_len
180 || (!IS_ABSOLUTE_PATH (search_name)
181 && IS_DIR_SEPARATOR (filename[len - search_len - 1]))
182 || (HAS_DRIVE_SPEC (filename)
183 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
186 /* Check for a symtab of a specific name by searching some symtabs.
187 This is a helper function for callbacks of iterate_over_symtabs.
189 The return value, NAME, REAL_PATH, CALLBACK, and DATA
190 are identical to the `map_symtabs_matching_filename' method of
191 quick_symbol_functions.
193 FIRST and AFTER_LAST indicate the range of symtabs to search.
194 AFTER_LAST is one past the last symtab to search; NULL means to
195 search until the end of the list. */
198 iterate_over_some_symtabs (const char *name,
199 const char *real_path,
200 int (*callback) (struct symtab *symtab,
203 struct symtab *first,
204 struct symtab *after_last)
206 struct symtab *s = NULL;
207 const char* base_name = lbasename (name);
209 for (s = first; s != NULL && s != after_last; s = s->next)
211 if (compare_filenames_for_search (s->filename, name))
213 if (callback (s, data))
218 /* Before we invoke realpath, which can get expensive when many
219 files are involved, do a quick comparison of the basenames. */
220 if (! basenames_may_differ
221 && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
224 if (compare_filenames_for_search (symtab_to_fullname (s), name))
226 if (callback (s, data))
231 /* If the user gave us an absolute path, try to find the file in
232 this symtab and use its absolute path. */
234 if (real_path != NULL)
236 const char *fullname = symtab_to_fullname (s);
238 gdb_assert (IS_ABSOLUTE_PATH (real_path));
239 gdb_assert (IS_ABSOLUTE_PATH (name));
240 if (FILENAME_CMP (real_path, fullname) == 0)
242 if (callback (s, data))
252 /* Check for a symtab of a specific name; first in symtabs, then in
253 psymtabs. *If* there is no '/' in the name, a match after a '/'
254 in the symtab filename will also work.
256 Calls CALLBACK with each symtab that is found and with the supplied
257 DATA. If CALLBACK returns true, the search stops. */
260 iterate_over_symtabs (const char *name,
261 int (*callback) (struct symtab *symtab,
265 struct objfile *objfile;
266 char *real_path = NULL;
267 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
269 /* Here we are interested in canonicalizing an absolute path, not
270 absolutizing a relative path. */
271 if (IS_ABSOLUTE_PATH (name))
273 real_path = gdb_realpath (name);
274 make_cleanup (xfree, real_path);
275 gdb_assert (IS_ABSOLUTE_PATH (real_path));
278 ALL_OBJFILES (objfile)
280 if (iterate_over_some_symtabs (name, real_path, callback, data,
281 objfile->symtabs, NULL))
283 do_cleanups (cleanups);
288 /* Same search rules as above apply here, but now we look thru the
291 ALL_OBJFILES (objfile)
294 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
300 do_cleanups (cleanups);
305 do_cleanups (cleanups);
308 /* The callback function used by lookup_symtab. */
311 lookup_symtab_callback (struct symtab *symtab, void *data)
313 struct symtab **result_ptr = data;
315 *result_ptr = symtab;
319 /* A wrapper for iterate_over_symtabs that returns the first matching
323 lookup_symtab (const char *name)
325 struct symtab *result = NULL;
327 iterate_over_symtabs (name, lookup_symtab_callback, &result);
332 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
333 full method name, which consist of the class name (from T), the unadorned
334 method name from METHOD_ID, and the signature for the specific overload,
335 specified by SIGNATURE_ID. Note that this function is g++ specific. */
338 gdb_mangle_name (struct type *type, int method_id, int signature_id)
340 int mangled_name_len;
342 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
343 struct fn_field *method = &f[signature_id];
344 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
345 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
346 const char *newname = type_name_no_tag (type);
348 /* Does the form of physname indicate that it is the full mangled name
349 of a constructor (not just the args)? */
350 int is_full_physname_constructor;
353 int is_destructor = is_destructor_name (physname);
354 /* Need a new type prefix. */
355 char *const_prefix = method->is_const ? "C" : "";
356 char *volatile_prefix = method->is_volatile ? "V" : "";
358 int len = (newname == NULL ? 0 : strlen (newname));
360 /* Nothing to do if physname already contains a fully mangled v3 abi name
361 or an operator name. */
362 if ((physname[0] == '_' && physname[1] == 'Z')
363 || is_operator_name (field_name))
364 return xstrdup (physname);
366 is_full_physname_constructor = is_constructor_name (physname);
368 is_constructor = is_full_physname_constructor
369 || (newname && strcmp (field_name, newname) == 0);
372 is_destructor = (strncmp (physname, "__dt", 4) == 0);
374 if (is_destructor || is_full_physname_constructor)
376 mangled_name = (char *) xmalloc (strlen (physname) + 1);
377 strcpy (mangled_name, physname);
383 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
385 else if (physname[0] == 't' || physname[0] == 'Q')
387 /* The physname for template and qualified methods already includes
389 xsnprintf (buf, sizeof (buf), "__%s%s", const_prefix, volatile_prefix);
395 xsnprintf (buf, sizeof (buf), "__%s%s%d", const_prefix,
396 volatile_prefix, len);
398 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
399 + strlen (buf) + len + strlen (physname) + 1);
401 mangled_name = (char *) xmalloc (mangled_name_len);
403 mangled_name[0] = '\0';
405 strcpy (mangled_name, field_name);
407 strcat (mangled_name, buf);
408 /* If the class doesn't have a name, i.e. newname NULL, then we just
409 mangle it using 0 for the length of the class. Thus it gets mangled
410 as something starting with `::' rather than `classname::'. */
412 strcat (mangled_name, newname);
414 strcat (mangled_name, physname);
415 return (mangled_name);
418 /* Initialize the cplus_specific structure. 'cplus_specific' should
419 only be allocated for use with cplus symbols. */
422 symbol_init_cplus_specific (struct general_symbol_info *gsymbol,
423 struct obstack *obstack)
425 /* A language_specific structure should not have been previously
427 gdb_assert (gsymbol->language_specific.cplus_specific == NULL);
428 gdb_assert (obstack != NULL);
430 gsymbol->language_specific.cplus_specific =
431 OBSTACK_ZALLOC (obstack, struct cplus_specific);
434 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
435 correctly allocated. For C++ symbols a cplus_specific struct is
436 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
437 OBJFILE can be NULL. */
440 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
442 struct obstack *obstack)
444 if (gsymbol->language == language_cplus)
446 if (gsymbol->language_specific.cplus_specific == NULL)
447 symbol_init_cplus_specific (gsymbol, obstack);
449 gsymbol->language_specific.cplus_specific->demangled_name = name;
452 gsymbol->language_specific.mangled_lang.demangled_name = name;
455 /* Return the demangled name of GSYMBOL. */
458 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
460 if (gsymbol->language == language_cplus)
462 if (gsymbol->language_specific.cplus_specific != NULL)
463 return gsymbol->language_specific.cplus_specific->demangled_name;
468 return gsymbol->language_specific.mangled_lang.demangled_name;
472 /* Initialize the language dependent portion of a symbol
473 depending upon the language for the symbol. */
476 symbol_set_language (struct general_symbol_info *gsymbol,
477 enum language language)
479 gsymbol->language = language;
480 if (gsymbol->language == language_d
481 || gsymbol->language == language_go
482 || gsymbol->language == language_java
483 || gsymbol->language == language_objc
484 || gsymbol->language == language_fortran)
486 symbol_set_demangled_name (gsymbol, NULL, NULL);
488 else if (gsymbol->language == language_cplus)
489 gsymbol->language_specific.cplus_specific = NULL;
492 memset (&gsymbol->language_specific, 0,
493 sizeof (gsymbol->language_specific));
497 /* Functions to initialize a symbol's mangled name. */
499 /* Objects of this type are stored in the demangled name hash table. */
500 struct demangled_name_entry
506 /* Hash function for the demangled name hash. */
509 hash_demangled_name_entry (const void *data)
511 const struct demangled_name_entry *e = data;
513 return htab_hash_string (e->mangled);
516 /* Equality function for the demangled name hash. */
519 eq_demangled_name_entry (const void *a, const void *b)
521 const struct demangled_name_entry *da = a;
522 const struct demangled_name_entry *db = b;
524 return strcmp (da->mangled, db->mangled) == 0;
527 /* Create the hash table used for demangled names. Each hash entry is
528 a pair of strings; one for the mangled name and one for the demangled
529 name. The entry is hashed via just the mangled name. */
532 create_demangled_names_hash (struct objfile *objfile)
534 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
535 The hash table code will round this up to the next prime number.
536 Choosing a much larger table size wastes memory, and saves only about
537 1% in symbol reading. */
539 objfile->demangled_names_hash = htab_create_alloc
540 (256, hash_demangled_name_entry, eq_demangled_name_entry,
541 NULL, xcalloc, xfree);
544 /* Try to determine the demangled name for a symbol, based on the
545 language of that symbol. If the language is set to language_auto,
546 it will attempt to find any demangling algorithm that works and
547 then set the language appropriately. The returned name is allocated
548 by the demangler and should be xfree'd. */
551 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
554 char *demangled = NULL;
556 if (gsymbol->language == language_unknown)
557 gsymbol->language = language_auto;
559 if (gsymbol->language == language_objc
560 || gsymbol->language == language_auto)
563 objc_demangle (mangled, 0);
564 if (demangled != NULL)
566 gsymbol->language = language_objc;
570 if (gsymbol->language == language_cplus
571 || gsymbol->language == language_auto)
574 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
575 if (demangled != NULL)
577 gsymbol->language = language_cplus;
581 if (gsymbol->language == language_java)
584 cplus_demangle (mangled,
585 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
586 if (demangled != NULL)
588 gsymbol->language = language_java;
592 if (gsymbol->language == language_d
593 || gsymbol->language == language_auto)
595 demangled = d_demangle(mangled, 0);
596 if (demangled != NULL)
598 gsymbol->language = language_d;
602 /* FIXME(dje): Continually adding languages here is clumsy.
603 Better to just call la_demangle if !auto, and if auto then call
604 a utility routine that tries successive languages in turn and reports
605 which one it finds. I realize the la_demangle options may be different
606 for different languages but there's already a FIXME for that. */
607 if (gsymbol->language == language_go
608 || gsymbol->language == language_auto)
610 demangled = go_demangle (mangled, 0);
611 if (demangled != NULL)
613 gsymbol->language = language_go;
618 /* We could support `gsymbol->language == language_fortran' here to provide
619 module namespaces also for inferiors with only minimal symbol table (ELF
620 symbols). Just the mangling standard is not standardized across compilers
621 and there is no DW_AT_producer available for inferiors with only the ELF
622 symbols to check the mangling kind. */
626 /* Set both the mangled and demangled (if any) names for GSYMBOL based
627 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
628 objfile's obstack; but if COPY_NAME is 0 and if NAME is
629 NUL-terminated, then this function assumes that NAME is already
630 correctly saved (either permanently or with a lifetime tied to the
631 objfile), and it will not be copied.
633 The hash table corresponding to OBJFILE is used, and the memory
634 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
635 so the pointer can be discarded after calling this function. */
637 /* We have to be careful when dealing with Java names: when we run
638 into a Java minimal symbol, we don't know it's a Java symbol, so it
639 gets demangled as a C++ name. This is unfortunate, but there's not
640 much we can do about it: but when demangling partial symbols and
641 regular symbols, we'd better not reuse the wrong demangled name.
642 (See PR gdb/1039.) We solve this by putting a distinctive prefix
643 on Java names when storing them in the hash table. */
645 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
646 don't mind the Java prefix so much: different languages have
647 different demangling requirements, so it's only natural that we
648 need to keep language data around in our demangling cache. But
649 it's not good that the minimal symbol has the wrong demangled name.
650 Unfortunately, I can't think of any easy solution to that
653 #define JAVA_PREFIX "##JAVA$$"
654 #define JAVA_PREFIX_LEN 8
657 symbol_set_names (struct general_symbol_info *gsymbol,
658 const char *linkage_name, int len, int copy_name,
659 struct objfile *objfile)
661 struct demangled_name_entry **slot;
662 /* A 0-terminated copy of the linkage name. */
663 const char *linkage_name_copy;
664 /* A copy of the linkage name that might have a special Java prefix
665 added to it, for use when looking names up in the hash table. */
666 const char *lookup_name;
667 /* The length of lookup_name. */
669 struct demangled_name_entry entry;
671 if (gsymbol->language == language_ada)
673 /* In Ada, we do the symbol lookups using the mangled name, so
674 we can save some space by not storing the demangled name.
676 As a side note, we have also observed some overlap between
677 the C++ mangling and Ada mangling, similarly to what has
678 been observed with Java. Because we don't store the demangled
679 name with the symbol, we don't need to use the same trick
682 gsymbol->name = linkage_name;
685 char *name = obstack_alloc (&objfile->objfile_obstack, len + 1);
687 memcpy (name, linkage_name, len);
689 gsymbol->name = name;
691 symbol_set_demangled_name (gsymbol, NULL, NULL);
696 if (objfile->demangled_names_hash == NULL)
697 create_demangled_names_hash (objfile);
699 /* The stabs reader generally provides names that are not
700 NUL-terminated; most of the other readers don't do this, so we
701 can just use the given copy, unless we're in the Java case. */
702 if (gsymbol->language == language_java)
706 lookup_len = len + JAVA_PREFIX_LEN;
707 alloc_name = alloca (lookup_len + 1);
708 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
709 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
710 alloc_name[lookup_len] = '\0';
712 lookup_name = alloc_name;
713 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
715 else if (linkage_name[len] != '\0')
720 alloc_name = alloca (lookup_len + 1);
721 memcpy (alloc_name, linkage_name, len);
722 alloc_name[lookup_len] = '\0';
724 lookup_name = alloc_name;
725 linkage_name_copy = alloc_name;
730 lookup_name = linkage_name;
731 linkage_name_copy = linkage_name;
734 entry.mangled = lookup_name;
735 slot = ((struct demangled_name_entry **)
736 htab_find_slot (objfile->demangled_names_hash,
739 /* If this name is not in the hash table, add it. */
741 /* A C version of the symbol may have already snuck into the table.
742 This happens to, e.g., main.init (__go_init_main). Cope. */
743 || (gsymbol->language == language_go
744 && (*slot)->demangled[0] == '\0'))
746 char *demangled_name = symbol_find_demangled_name (gsymbol,
748 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
750 /* Suppose we have demangled_name==NULL, copy_name==0, and
751 lookup_name==linkage_name. In this case, we already have the
752 mangled name saved, and we don't have a demangled name. So,
753 you might think we could save a little space by not recording
754 this in the hash table at all.
756 It turns out that it is actually important to still save such
757 an entry in the hash table, because storing this name gives
758 us better bcache hit rates for partial symbols. */
759 if (!copy_name && lookup_name == linkage_name)
761 *slot = obstack_alloc (&objfile->objfile_obstack,
762 offsetof (struct demangled_name_entry,
764 + demangled_len + 1);
765 (*slot)->mangled = lookup_name;
771 /* If we must copy the mangled name, put it directly after
772 the demangled name so we can have a single
774 *slot = obstack_alloc (&objfile->objfile_obstack,
775 offsetof (struct demangled_name_entry,
777 + lookup_len + demangled_len + 2);
778 mangled_ptr = &((*slot)->demangled[demangled_len + 1]);
779 strcpy (mangled_ptr, lookup_name);
780 (*slot)->mangled = mangled_ptr;
783 if (demangled_name != NULL)
785 strcpy ((*slot)->demangled, demangled_name);
786 xfree (demangled_name);
789 (*slot)->demangled[0] = '\0';
792 gsymbol->name = (*slot)->mangled + lookup_len - len;
793 if ((*slot)->demangled[0] != '\0')
794 symbol_set_demangled_name (gsymbol, (*slot)->demangled,
795 &objfile->objfile_obstack);
797 symbol_set_demangled_name (gsymbol, NULL, &objfile->objfile_obstack);
800 /* Return the source code name of a symbol. In languages where
801 demangling is necessary, this is the demangled name. */
804 symbol_natural_name (const struct general_symbol_info *gsymbol)
806 switch (gsymbol->language)
813 case language_fortran:
814 if (symbol_get_demangled_name (gsymbol) != NULL)
815 return symbol_get_demangled_name (gsymbol);
818 if (symbol_get_demangled_name (gsymbol) != NULL)
819 return symbol_get_demangled_name (gsymbol);
821 return ada_decode_symbol (gsymbol);
826 return gsymbol->name;
829 /* Return the demangled name for a symbol based on the language for
830 that symbol. If no demangled name exists, return NULL. */
833 symbol_demangled_name (const struct general_symbol_info *gsymbol)
835 const char *dem_name = NULL;
837 switch (gsymbol->language)
844 case language_fortran:
845 dem_name = symbol_get_demangled_name (gsymbol);
848 dem_name = symbol_get_demangled_name (gsymbol);
849 if (dem_name == NULL)
850 dem_name = ada_decode_symbol (gsymbol);
858 /* Return the search name of a symbol---generally the demangled or
859 linkage name of the symbol, depending on how it will be searched for.
860 If there is no distinct demangled name, then returns the same value
861 (same pointer) as SYMBOL_LINKAGE_NAME. */
864 symbol_search_name (const struct general_symbol_info *gsymbol)
866 if (gsymbol->language == language_ada)
867 return gsymbol->name;
869 return symbol_natural_name (gsymbol);
872 /* Initialize the structure fields to zero values. */
875 init_sal (struct symtab_and_line *sal)
883 sal->explicit_pc = 0;
884 sal->explicit_line = 0;
889 /* Return 1 if the two sections are the same, or if they could
890 plausibly be copies of each other, one in an original object
891 file and another in a separated debug file. */
894 matching_obj_sections (struct obj_section *obj_first,
895 struct obj_section *obj_second)
897 asection *first = obj_first? obj_first->the_bfd_section : NULL;
898 asection *second = obj_second? obj_second->the_bfd_section : NULL;
901 /* If they're the same section, then they match. */
905 /* If either is NULL, give up. */
906 if (first == NULL || second == NULL)
909 /* This doesn't apply to absolute symbols. */
910 if (first->owner == NULL || second->owner == NULL)
913 /* If they're in the same object file, they must be different sections. */
914 if (first->owner == second->owner)
917 /* Check whether the two sections are potentially corresponding. They must
918 have the same size, address, and name. We can't compare section indexes,
919 which would be more reliable, because some sections may have been
921 if (bfd_get_section_size (first) != bfd_get_section_size (second))
924 /* In-memory addresses may start at a different offset, relativize them. */
925 if (bfd_get_section_vma (first->owner, first)
926 - bfd_get_start_address (first->owner)
927 != bfd_get_section_vma (second->owner, second)
928 - bfd_get_start_address (second->owner))
931 if (bfd_get_section_name (first->owner, first) == NULL
932 || bfd_get_section_name (second->owner, second) == NULL
933 || strcmp (bfd_get_section_name (first->owner, first),
934 bfd_get_section_name (second->owner, second)) != 0)
937 /* Otherwise check that they are in corresponding objfiles. */
940 if (obj->obfd == first->owner)
942 gdb_assert (obj != NULL);
944 if (obj->separate_debug_objfile != NULL
945 && obj->separate_debug_objfile->obfd == second->owner)
947 if (obj->separate_debug_objfile_backlink != NULL
948 && obj->separate_debug_objfile_backlink->obfd == second->owner)
955 find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section)
957 struct objfile *objfile;
958 struct minimal_symbol *msymbol;
960 /* If we know that this is not a text address, return failure. This is
961 necessary because we loop based on texthigh and textlow, which do
962 not include the data ranges. */
963 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
965 && (MSYMBOL_TYPE (msymbol) == mst_data
966 || MSYMBOL_TYPE (msymbol) == mst_bss
967 || MSYMBOL_TYPE (msymbol) == mst_abs
968 || MSYMBOL_TYPE (msymbol) == mst_file_data
969 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
972 ALL_OBJFILES (objfile)
974 struct symtab *result = NULL;
977 result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
986 /* Debug symbols usually don't have section information. We need to dig that
987 out of the minimal symbols and stash that in the debug symbol. */
990 fixup_section (struct general_symbol_info *ginfo,
991 CORE_ADDR addr, struct objfile *objfile)
993 struct minimal_symbol *msym;
995 /* First, check whether a minimal symbol with the same name exists
996 and points to the same address. The address check is required
997 e.g. on PowerPC64, where the minimal symbol for a function will
998 point to the function descriptor, while the debug symbol will
999 point to the actual function code. */
1000 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1003 ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
1004 ginfo->section = SYMBOL_SECTION (msym);
1008 /* Static, function-local variables do appear in the linker
1009 (minimal) symbols, but are frequently given names that won't
1010 be found via lookup_minimal_symbol(). E.g., it has been
1011 observed in frv-uclinux (ELF) executables that a static,
1012 function-local variable named "foo" might appear in the
1013 linker symbols as "foo.6" or "foo.3". Thus, there is no
1014 point in attempting to extend the lookup-by-name mechanism to
1015 handle this case due to the fact that there can be multiple
1018 So, instead, search the section table when lookup by name has
1019 failed. The ``addr'' and ``endaddr'' fields may have already
1020 been relocated. If so, the relocation offset (i.e. the
1021 ANOFFSET value) needs to be subtracted from these values when
1022 performing the comparison. We unconditionally subtract it,
1023 because, when no relocation has been performed, the ANOFFSET
1024 value will simply be zero.
1026 The address of the symbol whose section we're fixing up HAS
1027 NOT BEEN adjusted (relocated) yet. It can't have been since
1028 the section isn't yet known and knowing the section is
1029 necessary in order to add the correct relocation value. In
1030 other words, we wouldn't even be in this function (attempting
1031 to compute the section) if it were already known.
1033 Note that it is possible to search the minimal symbols
1034 (subtracting the relocation value if necessary) to find the
1035 matching minimal symbol, but this is overkill and much less
1036 efficient. It is not necessary to find the matching minimal
1037 symbol, only its section.
1039 Note that this technique (of doing a section table search)
1040 can fail when unrelocated section addresses overlap. For
1041 this reason, we still attempt a lookup by name prior to doing
1042 a search of the section table. */
1044 struct obj_section *s;
1046 ALL_OBJFILE_OSECTIONS (objfile, s)
1048 int idx = s->the_bfd_section->index;
1049 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1051 if (obj_section_addr (s) - offset <= addr
1052 && addr < obj_section_endaddr (s) - offset)
1054 ginfo->obj_section = s;
1055 ginfo->section = idx;
1063 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1070 if (SYMBOL_OBJ_SECTION (sym))
1073 /* We either have an OBJFILE, or we can get at it from the sym's
1074 symtab. Anything else is a bug. */
1075 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1077 if (objfile == NULL)
1078 objfile = SYMBOL_SYMTAB (sym)->objfile;
1080 /* We should have an objfile by now. */
1081 gdb_assert (objfile);
1083 switch (SYMBOL_CLASS (sym))
1087 addr = SYMBOL_VALUE_ADDRESS (sym);
1090 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1094 /* Nothing else will be listed in the minsyms -- no use looking
1099 fixup_section (&sym->ginfo, addr, objfile);
1104 /* Compute the demangled form of NAME as used by the various symbol
1105 lookup functions. The result is stored in *RESULT_NAME. Returns a
1106 cleanup which can be used to clean up the result.
1108 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1109 Normally, Ada symbol lookups are performed using the encoded name
1110 rather than the demangled name, and so it might seem to make sense
1111 for this function to return an encoded version of NAME.
1112 Unfortunately, we cannot do this, because this function is used in
1113 circumstances where it is not appropriate to try to encode NAME.
1114 For instance, when displaying the frame info, we demangle the name
1115 of each parameter, and then perform a symbol lookup inside our
1116 function using that demangled name. In Ada, certain functions
1117 have internally-generated parameters whose name contain uppercase
1118 characters. Encoding those name would result in those uppercase
1119 characters to become lowercase, and thus cause the symbol lookup
1123 demangle_for_lookup (const char *name, enum language lang,
1124 const char **result_name)
1126 char *demangled_name = NULL;
1127 const char *modified_name = NULL;
1128 struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
1130 modified_name = name;
1132 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1133 lookup, so we can always binary search. */
1134 if (lang == language_cplus)
1136 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1139 modified_name = demangled_name;
1140 make_cleanup (xfree, demangled_name);
1144 /* If we were given a non-mangled name, canonicalize it
1145 according to the language (so far only for C++). */
1146 demangled_name = cp_canonicalize_string (name);
1149 modified_name = demangled_name;
1150 make_cleanup (xfree, demangled_name);
1154 else if (lang == language_java)
1156 demangled_name = cplus_demangle (name,
1157 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1160 modified_name = demangled_name;
1161 make_cleanup (xfree, demangled_name);
1164 else if (lang == language_d)
1166 demangled_name = d_demangle (name, 0);
1169 modified_name = demangled_name;
1170 make_cleanup (xfree, demangled_name);
1173 else if (lang == language_go)
1175 demangled_name = go_demangle (name, 0);
1178 modified_name = demangled_name;
1179 make_cleanup (xfree, demangled_name);
1183 *result_name = modified_name;
1187 /* Find the definition for a specified symbol name NAME
1188 in domain DOMAIN, visible from lexical block BLOCK.
1189 Returns the struct symbol pointer, or zero if no symbol is found.
1190 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1191 NAME is a field of the current implied argument `this'. If so set
1192 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1193 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1194 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1196 /* This function (or rather its subordinates) have a bunch of loops and
1197 it would seem to be attractive to put in some QUIT's (though I'm not really
1198 sure whether it can run long enough to be really important). But there
1199 are a few calls for which it would appear to be bad news to quit
1200 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1201 that there is C++ code below which can error(), but that probably
1202 doesn't affect these calls since they are looking for a known
1203 variable and thus can probably assume it will never hit the C++
1207 lookup_symbol_in_language (const char *name, const struct block *block,
1208 const domain_enum domain, enum language lang,
1209 struct field_of_this_result *is_a_field_of_this)
1211 const char *modified_name;
1212 struct symbol *returnval;
1213 struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name);
1215 returnval = lookup_symbol_aux (modified_name, block, domain, lang,
1216 is_a_field_of_this);
1217 do_cleanups (cleanup);
1222 /* Behave like lookup_symbol_in_language, but performed with the
1223 current language. */
1226 lookup_symbol (const char *name, const struct block *block,
1228 struct field_of_this_result *is_a_field_of_this)
1230 return lookup_symbol_in_language (name, block, domain,
1231 current_language->la_language,
1232 is_a_field_of_this);
1235 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1236 found, or NULL if not found. */
1239 lookup_language_this (const struct language_defn *lang,
1240 const struct block *block)
1242 if (lang->la_name_of_this == NULL || block == NULL)
1249 sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN);
1252 block_found = block;
1255 if (BLOCK_FUNCTION (block))
1257 block = BLOCK_SUPERBLOCK (block);
1263 /* Given TYPE, a structure/union,
1264 return 1 if the component named NAME from the ultimate target
1265 structure/union is defined, otherwise, return 0. */
1268 check_field (struct type *type, const char *name,
1269 struct field_of_this_result *is_a_field_of_this)
1273 /* The type may be a stub. */
1274 CHECK_TYPEDEF (type);
1276 for (i = TYPE_NFIELDS (type) - 1; i >= TYPE_N_BASECLASSES (type); i--)
1278 const char *t_field_name = TYPE_FIELD_NAME (type, i);
1280 if (t_field_name && (strcmp_iw (t_field_name, name) == 0))
1282 is_a_field_of_this->type = type;
1283 is_a_field_of_this->field = &TYPE_FIELD (type, i);
1288 /* C++: If it was not found as a data field, then try to return it
1289 as a pointer to a method. */
1291 for (i = TYPE_NFN_FIELDS (type) - 1; i >= 0; --i)
1293 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type, i), name) == 0)
1295 is_a_field_of_this->type = type;
1296 is_a_field_of_this->fn_field = &TYPE_FN_FIELDLIST (type, i);
1301 for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
1302 if (check_field (TYPE_BASECLASS (type, i), name, is_a_field_of_this))
1308 /* Behave like lookup_symbol except that NAME is the natural name
1309 (e.g., demangled name) of the symbol that we're looking for. */
1311 static struct symbol *
1312 lookup_symbol_aux (const char *name, const struct block *block,
1313 const domain_enum domain, enum language language,
1314 struct field_of_this_result *is_a_field_of_this)
1317 const struct language_defn *langdef;
1319 /* Make sure we do something sensible with is_a_field_of_this, since
1320 the callers that set this parameter to some non-null value will
1321 certainly use it later. If we don't set it, the contents of
1322 is_a_field_of_this are undefined. */
1323 if (is_a_field_of_this != NULL)
1324 memset (is_a_field_of_this, 0, sizeof (*is_a_field_of_this));
1326 /* Search specified block and its superiors. Don't search
1327 STATIC_BLOCK or GLOBAL_BLOCK. */
1329 sym = lookup_symbol_aux_local (name, block, domain, language);
1333 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1334 check to see if NAME is a field of `this'. */
1336 langdef = language_def (language);
1338 /* Don't do this check if we are searching for a struct. It will
1339 not be found by check_field, but will be found by other
1341 if (is_a_field_of_this != NULL && domain != STRUCT_DOMAIN)
1343 struct symbol *sym = lookup_language_this (langdef, block);
1347 struct type *t = sym->type;
1349 /* I'm not really sure that type of this can ever
1350 be typedefed; just be safe. */
1352 if (TYPE_CODE (t) == TYPE_CODE_PTR
1353 || TYPE_CODE (t) == TYPE_CODE_REF)
1354 t = TYPE_TARGET_TYPE (t);
1356 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1357 && TYPE_CODE (t) != TYPE_CODE_UNION)
1358 error (_("Internal error: `%s' is not an aggregate"),
1359 langdef->la_name_of_this);
1361 if (check_field (t, name, is_a_field_of_this))
1366 /* Now do whatever is appropriate for LANGUAGE to look
1367 up static and global variables. */
1369 sym = langdef->la_lookup_symbol_nonlocal (name, block, domain);
1373 /* Now search all static file-level symbols. Not strictly correct,
1374 but more useful than an error. */
1376 return lookup_static_symbol_aux (name, domain);
1379 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1380 first, then check the psymtabs. If a psymtab indicates the existence of the
1381 desired name as a file-level static, then do psymtab-to-symtab conversion on
1382 the fly and return the found symbol. */
1385 lookup_static_symbol_aux (const char *name, const domain_enum domain)
1387 struct objfile *objfile;
1390 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain);
1394 ALL_OBJFILES (objfile)
1396 sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain);
1404 /* Check to see if the symbol is defined in BLOCK or its superiors.
1405 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1407 static struct symbol *
1408 lookup_symbol_aux_local (const char *name, const struct block *block,
1409 const domain_enum domain,
1410 enum language language)
1413 const struct block *static_block = block_static_block (block);
1414 const char *scope = block_scope (block);
1416 /* Check if either no block is specified or it's a global block. */
1418 if (static_block == NULL)
1421 while (block != static_block)
1423 sym = lookup_symbol_aux_block (name, block, domain);
1427 if (language == language_cplus || language == language_fortran)
1429 sym = cp_lookup_symbol_imports_or_template (scope, name, block,
1435 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
1437 block = BLOCK_SUPERBLOCK (block);
1440 /* We've reached the edge of the function without finding a result. */
1445 /* Look up OBJFILE to BLOCK. */
1448 lookup_objfile_from_block (const struct block *block)
1450 struct objfile *obj;
1456 block = block_global_block (block);
1457 /* Go through SYMTABS. */
1458 ALL_SYMTABS (obj, s)
1459 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1461 if (obj->separate_debug_objfile_backlink)
1462 obj = obj->separate_debug_objfile_backlink;
1470 /* Look up a symbol in a block; if found, fixup the symbol, and set
1471 block_found appropriately. */
1474 lookup_symbol_aux_block (const char *name, const struct block *block,
1475 const domain_enum domain)
1479 sym = lookup_block_symbol (block, name, domain);
1482 block_found = block;
1483 return fixup_symbol_section (sym, NULL);
1489 /* Check all global symbols in OBJFILE in symtabs and
1493 lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
1495 const domain_enum domain)
1497 const struct objfile *objfile;
1499 struct blockvector *bv;
1500 const struct block *block;
1503 for (objfile = main_objfile;
1505 objfile = objfile_separate_debug_iterate (main_objfile, objfile))
1507 /* Go through symtabs. */
1508 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1510 bv = BLOCKVECTOR (s);
1511 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1512 sym = lookup_block_symbol (block, name, domain);
1515 block_found = block;
1516 return fixup_symbol_section (sym, (struct objfile *)objfile);
1520 sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK,
1529 /* Check to see if the symbol is defined in one of the OBJFILE's
1530 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1531 depending on whether or not we want to search global symbols or
1534 static struct symbol *
1535 lookup_symbol_aux_objfile (struct objfile *objfile, int block_index,
1536 const char *name, const domain_enum domain)
1538 struct symbol *sym = NULL;
1539 struct blockvector *bv;
1540 const struct block *block;
1543 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1545 bv = BLOCKVECTOR (s);
1546 block = BLOCKVECTOR_BLOCK (bv, block_index);
1547 sym = lookup_block_symbol (block, name, domain);
1550 block_found = block;
1551 return fixup_symbol_section (sym, objfile);
1558 /* Same as lookup_symbol_aux_objfile, except that it searches all
1559 objfiles. Return the first match found. */
1561 static struct symbol *
1562 lookup_symbol_aux_symtabs (int block_index, const char *name,
1563 const domain_enum domain)
1566 struct objfile *objfile;
1568 ALL_OBJFILES (objfile)
1570 sym = lookup_symbol_aux_objfile (objfile, block_index, name, domain);
1578 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1579 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1580 and all related objfiles. */
1582 static struct symbol *
1583 lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
1584 const char *linkage_name,
1587 enum language lang = current_language->la_language;
1588 const char *modified_name;
1589 struct cleanup *cleanup = demangle_for_lookup (linkage_name, lang,
1591 struct objfile *main_objfile, *cur_objfile;
1593 if (objfile->separate_debug_objfile_backlink)
1594 main_objfile = objfile->separate_debug_objfile_backlink;
1596 main_objfile = objfile;
1598 for (cur_objfile = main_objfile;
1600 cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile))
1604 sym = lookup_symbol_aux_objfile (cur_objfile, GLOBAL_BLOCK,
1605 modified_name, domain);
1607 sym = lookup_symbol_aux_objfile (cur_objfile, STATIC_BLOCK,
1608 modified_name, domain);
1611 do_cleanups (cleanup);
1616 do_cleanups (cleanup);
1620 /* A helper function that throws an exception when a symbol was found
1621 in a psymtab but not in a symtab. */
1623 static void ATTRIBUTE_NORETURN
1624 error_in_psymtab_expansion (int kind, const char *name, struct symtab *symtab)
1627 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1628 %s may be an inlined function, or may be a template function\n \
1629 (if a template, try specifying an instantiation: %s<type>)."),
1630 kind == GLOBAL_BLOCK ? "global" : "static",
1631 name, symtab_to_filename_for_display (symtab), name, name);
1634 /* A helper function for lookup_symbol_aux that interfaces with the
1635 "quick" symbol table functions. */
1637 static struct symbol *
1638 lookup_symbol_aux_quick (struct objfile *objfile, int kind,
1639 const char *name, const domain_enum domain)
1641 struct symtab *symtab;
1642 struct blockvector *bv;
1643 const struct block *block;
1648 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain);
1652 bv = BLOCKVECTOR (symtab);
1653 block = BLOCKVECTOR_BLOCK (bv, kind);
1654 sym = lookup_block_symbol (block, name, domain);
1656 error_in_psymtab_expansion (kind, name, symtab);
1657 return fixup_symbol_section (sym, objfile);
1660 /* A default version of lookup_symbol_nonlocal for use by languages
1661 that can't think of anything better to do. This implements the C
1665 basic_lookup_symbol_nonlocal (const char *name,
1666 const struct block *block,
1667 const domain_enum domain)
1671 /* NOTE: carlton/2003-05-19: The comments below were written when
1672 this (or what turned into this) was part of lookup_symbol_aux;
1673 I'm much less worried about these questions now, since these
1674 decisions have turned out well, but I leave these comments here
1677 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1678 not it would be appropriate to search the current global block
1679 here as well. (That's what this code used to do before the
1680 is_a_field_of_this check was moved up.) On the one hand, it's
1681 redundant with the lookup_symbol_aux_symtabs search that happens
1682 next. On the other hand, if decode_line_1 is passed an argument
1683 like filename:var, then the user presumably wants 'var' to be
1684 searched for in filename. On the third hand, there shouldn't be
1685 multiple global variables all of which are named 'var', and it's
1686 not like decode_line_1 has ever restricted its search to only
1687 global variables in a single filename. All in all, only
1688 searching the static block here seems best: it's correct and it's
1691 /* NOTE: carlton/2002-12-05: There's also a possible performance
1692 issue here: if you usually search for global symbols in the
1693 current file, then it would be slightly better to search the
1694 current global block before searching all the symtabs. But there
1695 are other factors that have a much greater effect on performance
1696 than that one, so I don't think we should worry about that for
1699 sym = lookup_symbol_static (name, block, domain);
1703 return lookup_symbol_global (name, block, domain);
1706 /* Lookup a symbol in the static block associated to BLOCK, if there
1707 is one; do nothing if BLOCK is NULL or a global block. */
1710 lookup_symbol_static (const char *name,
1711 const struct block *block,
1712 const domain_enum domain)
1714 const struct block *static_block = block_static_block (block);
1716 if (static_block != NULL)
1717 return lookup_symbol_aux_block (name, static_block, domain);
1722 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1724 struct global_sym_lookup_data
1726 /* The name of the symbol we are searching for. */
1729 /* The domain to use for our search. */
1732 /* The field where the callback should store the symbol if found.
1733 It should be initialized to NULL before the search is started. */
1734 struct symbol *result;
1737 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1738 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1739 OBJFILE. The arguments for the search are passed via CB_DATA,
1740 which in reality is a pointer to struct global_sym_lookup_data. */
1743 lookup_symbol_global_iterator_cb (struct objfile *objfile,
1746 struct global_sym_lookup_data *data =
1747 (struct global_sym_lookup_data *) cb_data;
1749 gdb_assert (data->result == NULL);
1751 data->result = lookup_symbol_aux_objfile (objfile, GLOBAL_BLOCK,
1752 data->name, data->domain);
1753 if (data->result == NULL)
1754 data->result = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK,
1755 data->name, data->domain);
1757 /* If we found a match, tell the iterator to stop. Otherwise,
1759 return (data->result != NULL);
1762 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1766 lookup_symbol_global (const char *name,
1767 const struct block *block,
1768 const domain_enum domain)
1770 struct symbol *sym = NULL;
1771 struct objfile *objfile = NULL;
1772 struct global_sym_lookup_data lookup_data;
1774 /* Call library-specific lookup procedure. */
1775 objfile = lookup_objfile_from_block (block);
1776 if (objfile != NULL)
1777 sym = solib_global_lookup (objfile, name, domain);
1781 memset (&lookup_data, 0, sizeof (lookup_data));
1782 lookup_data.name = name;
1783 lookup_data.domain = domain;
1784 gdbarch_iterate_over_objfiles_in_search_order
1785 (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch (),
1786 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
1788 return lookup_data.result;
1792 symbol_matches_domain (enum language symbol_language,
1793 domain_enum symbol_domain,
1796 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1797 A Java class declaration also defines a typedef for the class.
1798 Similarly, any Ada type declaration implicitly defines a typedef. */
1799 if (symbol_language == language_cplus
1800 || symbol_language == language_d
1801 || symbol_language == language_java
1802 || symbol_language == language_ada)
1804 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1805 && symbol_domain == STRUCT_DOMAIN)
1808 /* For all other languages, strict match is required. */
1809 return (symbol_domain == domain);
1812 /* Look up a type named NAME in the struct_domain. The type returned
1813 must not be opaque -- i.e., must have at least one field
1817 lookup_transparent_type (const char *name)
1819 return current_language->la_lookup_transparent_type (name);
1822 /* A helper for basic_lookup_transparent_type that interfaces with the
1823 "quick" symbol table functions. */
1825 static struct type *
1826 basic_lookup_transparent_type_quick (struct objfile *objfile, int kind,
1829 struct symtab *symtab;
1830 struct blockvector *bv;
1831 struct block *block;
1836 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN);
1840 bv = BLOCKVECTOR (symtab);
1841 block = BLOCKVECTOR_BLOCK (bv, kind);
1842 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1844 error_in_psymtab_expansion (kind, name, symtab);
1846 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1847 return SYMBOL_TYPE (sym);
1852 /* The standard implementation of lookup_transparent_type. This code
1853 was modeled on lookup_symbol -- the parts not relevant to looking
1854 up types were just left out. In particular it's assumed here that
1855 types are available in struct_domain and only at file-static or
1859 basic_lookup_transparent_type (const char *name)
1862 struct symtab *s = NULL;
1863 struct blockvector *bv;
1864 struct objfile *objfile;
1865 struct block *block;
1868 /* Now search all the global symbols. Do the symtab's first, then
1869 check the psymtab's. If a psymtab indicates the existence
1870 of the desired name as a global, then do psymtab-to-symtab
1871 conversion on the fly and return the found symbol. */
1873 ALL_OBJFILES (objfile)
1875 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1877 bv = BLOCKVECTOR (s);
1878 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1879 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1880 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1882 return SYMBOL_TYPE (sym);
1887 ALL_OBJFILES (objfile)
1889 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
1894 /* Now search the static file-level symbols.
1895 Not strictly correct, but more useful than an error.
1896 Do the symtab's first, then
1897 check the psymtab's. If a psymtab indicates the existence
1898 of the desired name as a file-level static, then do psymtab-to-symtab
1899 conversion on the fly and return the found symbol. */
1901 ALL_OBJFILES (objfile)
1903 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1905 bv = BLOCKVECTOR (s);
1906 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1907 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1908 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1910 return SYMBOL_TYPE (sym);
1915 ALL_OBJFILES (objfile)
1917 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
1922 return (struct type *) 0;
1925 /* Find the name of the file containing main(). */
1926 /* FIXME: What about languages without main() or specially linked
1927 executables that have no main() ? */
1930 find_main_filename (void)
1932 struct objfile *objfile;
1933 char *name = main_name ();
1935 ALL_OBJFILES (objfile)
1941 result = objfile->sf->qf->find_symbol_file (objfile, name);
1948 /* Search BLOCK for symbol NAME in DOMAIN.
1950 Note that if NAME is the demangled form of a C++ symbol, we will fail
1951 to find a match during the binary search of the non-encoded names, but
1952 for now we don't worry about the slight inefficiency of looking for
1953 a match we'll never find, since it will go pretty quick. Once the
1954 binary search terminates, we drop through and do a straight linear
1955 search on the symbols. Each symbol which is marked as being a ObjC/C++
1956 symbol (language_cplus or language_objc set) has both the encoded and
1957 non-encoded names tested for a match. */
1960 lookup_block_symbol (const struct block *block, const char *name,
1961 const domain_enum domain)
1963 struct block_iterator iter;
1966 if (!BLOCK_FUNCTION (block))
1968 for (sym = block_iter_name_first (block, name, &iter);
1970 sym = block_iter_name_next (name, &iter))
1972 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1973 SYMBOL_DOMAIN (sym), domain))
1980 /* Note that parameter symbols do not always show up last in the
1981 list; this loop makes sure to take anything else other than
1982 parameter symbols first; it only uses parameter symbols as a
1983 last resort. Note that this only takes up extra computation
1986 struct symbol *sym_found = NULL;
1988 for (sym = block_iter_name_first (block, name, &iter);
1990 sym = block_iter_name_next (name, &iter))
1992 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1993 SYMBOL_DOMAIN (sym), domain))
1996 if (!SYMBOL_IS_ARGUMENT (sym))
2002 return (sym_found); /* Will be NULL if not found. */
2006 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2008 For each symbol that matches, CALLBACK is called. The symbol and
2009 DATA are passed to the callback.
2011 If CALLBACK returns zero, the iteration ends. Otherwise, the
2012 search continues. */
2015 iterate_over_symbols (const struct block *block, const char *name,
2016 const domain_enum domain,
2017 symbol_found_callback_ftype *callback,
2020 struct block_iterator iter;
2023 for (sym = block_iter_name_first (block, name, &iter);
2025 sym = block_iter_name_next (name, &iter))
2027 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2028 SYMBOL_DOMAIN (sym), domain))
2030 if (!callback (sym, data))
2036 /* Find the symtab associated with PC and SECTION. Look through the
2037 psymtabs and read in another symtab if necessary. */
2040 find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
2043 struct blockvector *bv;
2044 struct symtab *s = NULL;
2045 struct symtab *best_s = NULL;
2046 struct objfile *objfile;
2047 CORE_ADDR distance = 0;
2048 struct minimal_symbol *msymbol;
2050 /* If we know that this is not a text address, return failure. This is
2051 necessary because we loop based on the block's high and low code
2052 addresses, which do not include the data ranges, and because
2053 we call find_pc_sect_psymtab which has a similar restriction based
2054 on the partial_symtab's texthigh and textlow. */
2055 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
2057 && (MSYMBOL_TYPE (msymbol) == mst_data
2058 || MSYMBOL_TYPE (msymbol) == mst_bss
2059 || MSYMBOL_TYPE (msymbol) == mst_abs
2060 || MSYMBOL_TYPE (msymbol) == mst_file_data
2061 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
2064 /* Search all symtabs for the one whose file contains our address, and which
2065 is the smallest of all the ones containing the address. This is designed
2066 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2067 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2068 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2070 This happens for native ecoff format, where code from included files
2071 gets its own symtab. The symtab for the included file should have
2072 been read in already via the dependency mechanism.
2073 It might be swifter to create several symtabs with the same name
2074 like xcoff does (I'm not sure).
2076 It also happens for objfiles that have their functions reordered.
2077 For these, the symtab we are looking for is not necessarily read in. */
2079 ALL_PRIMARY_SYMTABS (objfile, s)
2081 bv = BLOCKVECTOR (s);
2082 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2084 if (BLOCK_START (b) <= pc
2085 && BLOCK_END (b) > pc
2087 || BLOCK_END (b) - BLOCK_START (b) < distance))
2089 /* For an objfile that has its functions reordered,
2090 find_pc_psymtab will find the proper partial symbol table
2091 and we simply return its corresponding symtab. */
2092 /* In order to better support objfiles that contain both
2093 stabs and coff debugging info, we continue on if a psymtab
2095 if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
2097 struct symtab *result;
2100 = objfile->sf->qf->find_pc_sect_symtab (objfile,
2109 struct block_iterator iter;
2110 struct symbol *sym = NULL;
2112 ALL_BLOCK_SYMBOLS (b, iter, sym)
2114 fixup_symbol_section (sym, objfile);
2115 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
2119 continue; /* No symbol in this symtab matches
2122 distance = BLOCK_END (b) - BLOCK_START (b);
2130 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2132 ALL_OBJFILES (objfile)
2134 struct symtab *result;
2138 result = objfile->sf->qf->find_pc_sect_symtab (objfile,
2149 /* Find the symtab associated with PC. Look through the psymtabs and read
2150 in another symtab if necessary. Backward compatibility, no section. */
2153 find_pc_symtab (CORE_ADDR pc)
2155 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2159 /* Find the source file and line number for a given PC value and SECTION.
2160 Return a structure containing a symtab pointer, a line number,
2161 and a pc range for the entire source line.
2162 The value's .pc field is NOT the specified pc.
2163 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2164 use the line that ends there. Otherwise, in that case, the line
2165 that begins there is used. */
2167 /* The big complication here is that a line may start in one file, and end just
2168 before the start of another file. This usually occurs when you #include
2169 code in the middle of a subroutine. To properly find the end of a line's PC
2170 range, we must search all symtabs associated with this compilation unit, and
2171 find the one whose first PC is closer than that of the next line in this
2174 /* If it's worth the effort, we could be using a binary search. */
2176 struct symtab_and_line
2177 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
2180 struct linetable *l;
2183 struct linetable_entry *item;
2184 struct symtab_and_line val;
2185 struct blockvector *bv;
2186 struct minimal_symbol *msymbol;
2187 struct minimal_symbol *mfunsym;
2188 struct objfile *objfile;
2190 /* Info on best line seen so far, and where it starts, and its file. */
2192 struct linetable_entry *best = NULL;
2193 CORE_ADDR best_end = 0;
2194 struct symtab *best_symtab = 0;
2196 /* Store here the first line number
2197 of a file which contains the line at the smallest pc after PC.
2198 If we don't find a line whose range contains PC,
2199 we will use a line one less than this,
2200 with a range from the start of that file to the first line's pc. */
2201 struct linetable_entry *alt = NULL;
2203 /* Info on best line seen in this file. */
2205 struct linetable_entry *prev;
2207 /* If this pc is not from the current frame,
2208 it is the address of the end of a call instruction.
2209 Quite likely that is the start of the following statement.
2210 But what we want is the statement containing the instruction.
2211 Fudge the pc to make sure we get that. */
2213 init_sal (&val); /* initialize to zeroes */
2215 val.pspace = current_program_space;
2217 /* It's tempting to assume that, if we can't find debugging info for
2218 any function enclosing PC, that we shouldn't search for line
2219 number info, either. However, GAS can emit line number info for
2220 assembly files --- very helpful when debugging hand-written
2221 assembly code. In such a case, we'd have no debug info for the
2222 function, but we would have line info. */
2227 /* elz: added this because this function returned the wrong
2228 information if the pc belongs to a stub (import/export)
2229 to call a shlib function. This stub would be anywhere between
2230 two functions in the target, and the line info was erroneously
2231 taken to be the one of the line before the pc. */
2233 /* RT: Further explanation:
2235 * We have stubs (trampolines) inserted between procedures.
2237 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2238 * exists in the main image.
2240 * In the minimal symbol table, we have a bunch of symbols
2241 * sorted by start address. The stubs are marked as "trampoline",
2242 * the others appear as text. E.g.:
2244 * Minimal symbol table for main image
2245 * main: code for main (text symbol)
2246 * shr1: stub (trampoline symbol)
2247 * foo: code for foo (text symbol)
2249 * Minimal symbol table for "shr1" image:
2251 * shr1: code for shr1 (text symbol)
2254 * So the code below is trying to detect if we are in the stub
2255 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2256 * and if found, do the symbolization from the real-code address
2257 * rather than the stub address.
2259 * Assumptions being made about the minimal symbol table:
2260 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2261 * if we're really in the trampoline.s If we're beyond it (say
2262 * we're in "foo" in the above example), it'll have a closer
2263 * symbol (the "foo" text symbol for example) and will not
2264 * return the trampoline.
2265 * 2. lookup_minimal_symbol_text() will find a real text symbol
2266 * corresponding to the trampoline, and whose address will
2267 * be different than the trampoline address. I put in a sanity
2268 * check for the address being the same, to avoid an
2269 * infinite recursion.
2271 msymbol = lookup_minimal_symbol_by_pc (pc);
2272 if (msymbol != NULL)
2273 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2275 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2277 if (mfunsym == NULL)
2278 /* I eliminated this warning since it is coming out
2279 * in the following situation:
2280 * gdb shmain // test program with shared libraries
2281 * (gdb) break shr1 // function in shared lib
2282 * Warning: In stub for ...
2283 * In the above situation, the shared lib is not loaded yet,
2284 * so of course we can't find the real func/line info,
2285 * but the "break" still works, and the warning is annoying.
2286 * So I commented out the warning. RT */
2287 /* warning ("In stub for %s; unable to find real function/line info",
2288 SYMBOL_LINKAGE_NAME (msymbol)); */
2291 else if (SYMBOL_VALUE_ADDRESS (mfunsym)
2292 == SYMBOL_VALUE_ADDRESS (msymbol))
2293 /* Avoid infinite recursion */
2294 /* See above comment about why warning is commented out. */
2295 /* warning ("In stub for %s; unable to find real function/line info",
2296 SYMBOL_LINKAGE_NAME (msymbol)); */
2300 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2304 s = find_pc_sect_symtab (pc, section);
2307 /* If no symbol information, return previous pc. */
2314 bv = BLOCKVECTOR (s);
2315 objfile = s->objfile;
2317 /* Look at all the symtabs that share this blockvector.
2318 They all have the same apriori range, that we found was right;
2319 but they have different line tables. */
2321 ALL_OBJFILE_SYMTABS (objfile, s)
2323 if (BLOCKVECTOR (s) != bv)
2326 /* Find the best line in this symtab. */
2333 /* I think len can be zero if the symtab lacks line numbers
2334 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2335 I'm not sure which, and maybe it depends on the symbol
2341 item = l->item; /* Get first line info. */
2343 /* Is this file's first line closer than the first lines of other files?
2344 If so, record this file, and its first line, as best alternate. */
2345 if (item->pc > pc && (!alt || item->pc < alt->pc))
2348 for (i = 0; i < len; i++, item++)
2350 /* Leave prev pointing to the linetable entry for the last line
2351 that started at or before PC. */
2358 /* At this point, prev points at the line whose start addr is <= pc, and
2359 item points at the next line. If we ran off the end of the linetable
2360 (pc >= start of the last line), then prev == item. If pc < start of
2361 the first line, prev will not be set. */
2363 /* Is this file's best line closer than the best in the other files?
2364 If so, record this file, and its best line, as best so far. Don't
2365 save prev if it represents the end of a function (i.e. line number
2366 0) instead of a real line. */
2368 if (prev && prev->line && (!best || prev->pc > best->pc))
2373 /* Discard BEST_END if it's before the PC of the current BEST. */
2374 if (best_end <= best->pc)
2378 /* If another line (denoted by ITEM) is in the linetable and its
2379 PC is after BEST's PC, but before the current BEST_END, then
2380 use ITEM's PC as the new best_end. */
2381 if (best && i < len && item->pc > best->pc
2382 && (best_end == 0 || best_end > item->pc))
2383 best_end = item->pc;
2388 /* If we didn't find any line number info, just return zeros.
2389 We used to return alt->line - 1 here, but that could be
2390 anywhere; if we don't have line number info for this PC,
2391 don't make some up. */
2394 else if (best->line == 0)
2396 /* If our best fit is in a range of PC's for which no line
2397 number info is available (line number is zero) then we didn't
2398 find any valid line information. */
2403 val.symtab = best_symtab;
2404 val.line = best->line;
2406 if (best_end && (!alt || best_end < alt->pc))
2411 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2413 val.section = section;
2417 /* Backward compatibility (no section). */
2419 struct symtab_and_line
2420 find_pc_line (CORE_ADDR pc, int notcurrent)
2422 struct obj_section *section;
2424 section = find_pc_overlay (pc);
2425 if (pc_in_unmapped_range (pc, section))
2426 pc = overlay_mapped_address (pc, section);
2427 return find_pc_sect_line (pc, section, notcurrent);
2430 /* Find line number LINE in any symtab whose name is the same as
2433 If found, return the symtab that contains the linetable in which it was
2434 found, set *INDEX to the index in the linetable of the best entry
2435 found, and set *EXACT_MATCH nonzero if the value returned is an
2438 If not found, return NULL. */
2441 find_line_symtab (struct symtab *symtab, int line,
2442 int *index, int *exact_match)
2444 int exact = 0; /* Initialized here to avoid a compiler warning. */
2446 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2450 struct linetable *best_linetable;
2451 struct symtab *best_symtab;
2453 /* First try looking it up in the given symtab. */
2454 best_linetable = LINETABLE (symtab);
2455 best_symtab = symtab;
2456 best_index = find_line_common (best_linetable, line, &exact, 0);
2457 if (best_index < 0 || !exact)
2459 /* Didn't find an exact match. So we better keep looking for
2460 another symtab with the same name. In the case of xcoff,
2461 multiple csects for one source file (produced by IBM's FORTRAN
2462 compiler) produce multiple symtabs (this is unavoidable
2463 assuming csects can be at arbitrary places in memory and that
2464 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2466 /* BEST is the smallest linenumber > LINE so far seen,
2467 or 0 if none has been seen so far.
2468 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2471 struct objfile *objfile;
2474 if (best_index >= 0)
2475 best = best_linetable->item[best_index].line;
2479 ALL_OBJFILES (objfile)
2482 objfile->sf->qf->expand_symtabs_with_fullname (objfile,
2483 symtab_to_fullname (symtab));
2486 ALL_SYMTABS (objfile, s)
2488 struct linetable *l;
2491 if (FILENAME_CMP (symtab->filename, s->filename) != 0)
2493 if (FILENAME_CMP (symtab_to_fullname (symtab),
2494 symtab_to_fullname (s)) != 0)
2497 ind = find_line_common (l, line, &exact, 0);
2507 if (best == 0 || l->item[ind].line < best)
2509 best = l->item[ind].line;
2522 *index = best_index;
2524 *exact_match = exact;
2529 /* Given SYMTAB, returns all the PCs function in the symtab that
2530 exactly match LINE. Returns NULL if there are no exact matches,
2531 but updates BEST_ITEM in this case. */
2534 find_pcs_for_symtab_line (struct symtab *symtab, int line,
2535 struct linetable_entry **best_item)
2538 VEC (CORE_ADDR) *result = NULL;
2540 /* First, collect all the PCs that are at this line. */
2546 idx = find_line_common (LINETABLE (symtab), line, &was_exact, start);
2552 struct linetable_entry *item = &LINETABLE (symtab)->item[idx];
2554 if (*best_item == NULL || item->line < (*best_item)->line)
2560 VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc);
2568 /* Set the PC value for a given source file and line number and return true.
2569 Returns zero for invalid line number (and sets the PC to 0).
2570 The source file is specified with a struct symtab. */
2573 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2575 struct linetable *l;
2582 symtab = find_line_symtab (symtab, line, &ind, NULL);
2585 l = LINETABLE (symtab);
2586 *pc = l->item[ind].pc;
2593 /* Find the range of pc values in a line.
2594 Store the starting pc of the line into *STARTPTR
2595 and the ending pc (start of next line) into *ENDPTR.
2596 Returns 1 to indicate success.
2597 Returns 0 if could not find the specified line. */
2600 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2603 CORE_ADDR startaddr;
2604 struct symtab_and_line found_sal;
2607 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2610 /* This whole function is based on address. For example, if line 10 has
2611 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2612 "info line *0x123" should say the line goes from 0x100 to 0x200
2613 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2614 This also insures that we never give a range like "starts at 0x134
2615 and ends at 0x12c". */
2617 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2618 if (found_sal.line != sal.line)
2620 /* The specified line (sal) has zero bytes. */
2621 *startptr = found_sal.pc;
2622 *endptr = found_sal.pc;
2626 *startptr = found_sal.pc;
2627 *endptr = found_sal.end;
2632 /* Given a line table and a line number, return the index into the line
2633 table for the pc of the nearest line whose number is >= the specified one.
2634 Return -1 if none is found. The value is >= 0 if it is an index.
2635 START is the index at which to start searching the line table.
2637 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2640 find_line_common (struct linetable *l, int lineno,
2641 int *exact_match, int start)
2646 /* BEST is the smallest linenumber > LINENO so far seen,
2647 or 0 if none has been seen so far.
2648 BEST_INDEX identifies the item for it. */
2650 int best_index = -1;
2661 for (i = start; i < len; i++)
2663 struct linetable_entry *item = &(l->item[i]);
2665 if (item->line == lineno)
2667 /* Return the first (lowest address) entry which matches. */
2672 if (item->line > lineno && (best == 0 || item->line < best))
2679 /* If we got here, we didn't get an exact match. */
2684 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2686 struct symtab_and_line sal;
2688 sal = find_pc_line (pc, 0);
2691 return sal.symtab != 0;
2694 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2695 address for that function that has an entry in SYMTAB's line info
2696 table. If such an entry cannot be found, return FUNC_ADDR
2700 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
2702 CORE_ADDR func_start, func_end;
2703 struct linetable *l;
2706 /* Give up if this symbol has no lineinfo table. */
2707 l = LINETABLE (symtab);
2711 /* Get the range for the function's PC values, or give up if we
2712 cannot, for some reason. */
2713 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
2716 /* Linetable entries are ordered by PC values, see the commentary in
2717 symtab.h where `struct linetable' is defined. Thus, the first
2718 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2719 address we are looking for. */
2720 for (i = 0; i < l->nitems; i++)
2722 struct linetable_entry *item = &(l->item[i]);
2724 /* Don't use line numbers of zero, they mark special entries in
2725 the table. See the commentary on symtab.h before the
2726 definition of struct linetable. */
2727 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
2734 /* Given a function symbol SYM, find the symtab and line for the start
2736 If the argument FUNFIRSTLINE is nonzero, we want the first line
2737 of real code inside the function. */
2739 struct symtab_and_line
2740 find_function_start_sal (struct symbol *sym, int funfirstline)
2742 struct symtab_and_line sal;
2744 fixup_symbol_section (sym, NULL);
2745 sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
2746 SYMBOL_OBJ_SECTION (sym), 0);
2748 /* We always should have a line for the function start address.
2749 If we don't, something is odd. Create a plain SAL refering
2750 just the PC and hope that skip_prologue_sal (if requested)
2751 can find a line number for after the prologue. */
2752 if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym)))
2755 sal.pspace = current_program_space;
2756 sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2757 sal.section = SYMBOL_OBJ_SECTION (sym);
2761 skip_prologue_sal (&sal);
2766 /* Adjust SAL to the first instruction past the function prologue.
2767 If the PC was explicitly specified, the SAL is not changed.
2768 If the line number was explicitly specified, at most the SAL's PC
2769 is updated. If SAL is already past the prologue, then do nothing. */
2772 skip_prologue_sal (struct symtab_and_line *sal)
2775 struct symtab_and_line start_sal;
2776 struct cleanup *old_chain;
2777 CORE_ADDR pc, saved_pc;
2778 struct obj_section *section;
2780 struct objfile *objfile;
2781 struct gdbarch *gdbarch;
2782 struct block *b, *function_block;
2783 int force_skip, skip;
2785 /* Do not change the SAL if PC was specified explicitly. */
2786 if (sal->explicit_pc)
2789 old_chain = save_current_space_and_thread ();
2790 switch_to_program_space_and_thread (sal->pspace);
2792 sym = find_pc_sect_function (sal->pc, sal->section);
2795 fixup_symbol_section (sym, NULL);
2797 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2798 section = SYMBOL_OBJ_SECTION (sym);
2799 name = SYMBOL_LINKAGE_NAME (sym);
2800 objfile = SYMBOL_SYMTAB (sym)->objfile;
2804 struct minimal_symbol *msymbol
2805 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
2807 if (msymbol == NULL)
2809 do_cleanups (old_chain);
2813 pc = SYMBOL_VALUE_ADDRESS (msymbol);
2814 section = SYMBOL_OBJ_SECTION (msymbol);
2815 name = SYMBOL_LINKAGE_NAME (msymbol);
2816 objfile = msymbol_objfile (msymbol);
2819 gdbarch = get_objfile_arch (objfile);
2821 /* Process the prologue in two passes. In the first pass try to skip the
2822 prologue (SKIP is true) and verify there is a real need for it (indicated
2823 by FORCE_SKIP). If no such reason was found run a second pass where the
2824 prologue is not skipped (SKIP is false). */
2829 /* Be conservative - allow direct PC (without skipping prologue) only if we
2830 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2831 have to be set by the caller so we use SYM instead. */
2832 if (sym && SYMBOL_SYMTAB (sym)->locations_valid)
2840 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2841 so that gdbarch_skip_prologue has something unique to work on. */
2842 if (section_is_overlay (section) && !section_is_mapped (section))
2843 pc = overlay_unmapped_address (pc, section);
2845 /* Skip "first line" of function (which is actually its prologue). */
2846 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2848 pc = gdbarch_skip_prologue (gdbarch, pc);
2850 /* For overlays, map pc back into its mapped VMA range. */
2851 pc = overlay_mapped_address (pc, section);
2853 /* Calculate line number. */
2854 start_sal = find_pc_sect_line (pc, section, 0);
2856 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2857 line is still part of the same function. */
2858 if (skip && start_sal.pc != pc
2859 && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
2860 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2861 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section)
2862 == lookup_minimal_symbol_by_pc_section (pc, section))))
2864 /* First pc of next line */
2866 /* Recalculate the line number (might not be N+1). */
2867 start_sal = find_pc_sect_line (pc, section, 0);
2870 /* On targets with executable formats that don't have a concept of
2871 constructors (ELF with .init has, PE doesn't), gcc emits a call
2872 to `__main' in `main' between the prologue and before user
2874 if (gdbarch_skip_main_prologue_p (gdbarch)
2875 && name && strcmp_iw (name, "main") == 0)
2877 pc = gdbarch_skip_main_prologue (gdbarch, pc);
2878 /* Recalculate the line number (might not be N+1). */
2879 start_sal = find_pc_sect_line (pc, section, 0);
2883 while (!force_skip && skip--);
2885 /* If we still don't have a valid source line, try to find the first
2886 PC in the lineinfo table that belongs to the same function. This
2887 happens with COFF debug info, which does not seem to have an
2888 entry in lineinfo table for the code after the prologue which has
2889 no direct relation to source. For example, this was found to be
2890 the case with the DJGPP target using "gcc -gcoff" when the
2891 compiler inserted code after the prologue to make sure the stack
2893 if (!force_skip && sym && start_sal.symtab == NULL)
2895 pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
2896 /* Recalculate the line number. */
2897 start_sal = find_pc_sect_line (pc, section, 0);
2900 do_cleanups (old_chain);
2902 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2903 forward SAL to the end of the prologue. */
2908 sal->section = section;
2910 /* Unless the explicit_line flag was set, update the SAL line
2911 and symtab to correspond to the modified PC location. */
2912 if (sal->explicit_line)
2915 sal->symtab = start_sal.symtab;
2916 sal->line = start_sal.line;
2917 sal->end = start_sal.end;
2919 /* Check if we are now inside an inlined function. If we can,
2920 use the call site of the function instead. */
2921 b = block_for_pc_sect (sal->pc, sal->section);
2922 function_block = NULL;
2925 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
2927 else if (BLOCK_FUNCTION (b) != NULL)
2929 b = BLOCK_SUPERBLOCK (b);
2931 if (function_block != NULL
2932 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
2934 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
2935 sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
2939 /* If P is of the form "operator[ \t]+..." where `...' is
2940 some legitimate operator text, return a pointer to the
2941 beginning of the substring of the operator text.
2942 Otherwise, return "". */
2945 operator_chars (char *p, char **end)
2948 if (strncmp (p, "operator", 8))
2952 /* Don't get faked out by `operator' being part of a longer
2954 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2957 /* Allow some whitespace between `operator' and the operator symbol. */
2958 while (*p == ' ' || *p == '\t')
2961 /* Recognize 'operator TYPENAME'. */
2963 if (isalpha (*p) || *p == '_' || *p == '$')
2967 while (isalnum (*q) || *q == '_' || *q == '$')
2976 case '\\': /* regexp quoting */
2979 if (p[2] == '=') /* 'operator\*=' */
2981 else /* 'operator\*' */
2985 else if (p[1] == '[')
2988 error (_("mismatched quoting on brackets, "
2989 "try 'operator\\[\\]'"));
2990 else if (p[2] == '\\' && p[3] == ']')
2992 *end = p + 4; /* 'operator\[\]' */
2996 error (_("nothing is allowed between '[' and ']'"));
3000 /* Gratuitous qoute: skip it and move on. */
3022 if (p[0] == '-' && p[1] == '>')
3024 /* Struct pointer member operator 'operator->'. */
3027 *end = p + 3; /* 'operator->*' */
3030 else if (p[2] == '\\')
3032 *end = p + 4; /* Hopefully 'operator->\*' */
3037 *end = p + 2; /* 'operator->' */
3041 if (p[1] == '=' || p[1] == p[0])
3052 error (_("`operator ()' must be specified "
3053 "without whitespace in `()'"));
3058 error (_("`operator ?:' must be specified "
3059 "without whitespace in `?:'"));
3064 error (_("`operator []' must be specified "
3065 "without whitespace in `[]'"));
3069 error (_("`operator %s' not supported"), p);
3078 /* Cache to watch for file names already seen by filename_seen. */
3080 struct filename_seen_cache
3082 /* Table of files seen so far. */
3084 /* Initial size of the table. It automagically grows from here. */
3085 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3088 /* filename_seen_cache constructor. */
3090 static struct filename_seen_cache *
3091 create_filename_seen_cache (void)
3093 struct filename_seen_cache *cache;
3095 cache = XNEW (struct filename_seen_cache);
3096 cache->tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE,
3097 filename_hash, filename_eq,
3098 NULL, xcalloc, xfree);
3103 /* Empty the cache, but do not delete it. */
3106 clear_filename_seen_cache (struct filename_seen_cache *cache)
3108 htab_empty (cache->tab);
3111 /* filename_seen_cache destructor.
3112 This takes a void * argument as it is generally used as a cleanup. */
3115 delete_filename_seen_cache (void *ptr)
3117 struct filename_seen_cache *cache = ptr;
3119 htab_delete (cache->tab);
3123 /* If FILE is not already in the table of files in CACHE, return zero;
3124 otherwise return non-zero. Optionally add FILE to the table if ADD
3127 NOTE: We don't manage space for FILE, we assume FILE lives as long
3128 as the caller needs. */
3131 filename_seen (struct filename_seen_cache *cache, const char *file, int add)
3135 /* Is FILE in tab? */
3136 slot = htab_find_slot (cache->tab, file, add ? INSERT : NO_INSERT);
3140 /* No; maybe add it to tab. */
3142 *slot = (char *) file;
3147 /* Data structure to maintain printing state for output_source_filename. */
3149 struct output_source_filename_data
3151 /* Cache of what we've seen so far. */
3152 struct filename_seen_cache *filename_seen_cache;
3154 /* Flag of whether we're printing the first one. */
3158 /* Slave routine for sources_info. Force line breaks at ,'s.
3159 NAME is the name to print.
3160 DATA contains the state for printing and watching for duplicates. */
3163 output_source_filename (const char *name,
3164 struct output_source_filename_data *data)
3166 /* Since a single source file can result in several partial symbol
3167 tables, we need to avoid printing it more than once. Note: if
3168 some of the psymtabs are read in and some are not, it gets
3169 printed both under "Source files for which symbols have been
3170 read" and "Source files for which symbols will be read in on
3171 demand". I consider this a reasonable way to deal with the
3172 situation. I'm not sure whether this can also happen for
3173 symtabs; it doesn't hurt to check. */
3175 /* Was NAME already seen? */
3176 if (filename_seen (data->filename_seen_cache, name, 1))
3178 /* Yes; don't print it again. */
3182 /* No; print it and reset *FIRST. */
3184 printf_filtered (", ");
3188 fputs_filtered (name, gdb_stdout);
3191 /* A callback for map_partial_symbol_filenames. */
3194 output_partial_symbol_filename (const char *filename, const char *fullname,
3197 output_source_filename (fullname ? fullname : filename, data);
3201 sources_info (char *ignore, int from_tty)
3204 struct objfile *objfile;
3205 struct output_source_filename_data data;
3206 struct cleanup *cleanups;
3208 if (!have_full_symbols () && !have_partial_symbols ())
3210 error (_("No symbol table is loaded. Use the \"file\" command."));
3213 data.filename_seen_cache = create_filename_seen_cache ();
3214 cleanups = make_cleanup (delete_filename_seen_cache,
3215 data.filename_seen_cache);
3217 printf_filtered ("Source files for which symbols have been read in:\n\n");
3220 ALL_SYMTABS (objfile, s)
3222 const char *fullname = symtab_to_fullname (s);
3224 output_source_filename (fullname, &data);
3226 printf_filtered ("\n\n");
3228 printf_filtered ("Source files for which symbols "
3229 "will be read in on demand:\n\n");
3231 clear_filename_seen_cache (data.filename_seen_cache);
3233 map_partial_symbol_filenames (output_partial_symbol_filename, &data,
3234 1 /*need_fullname*/);
3235 printf_filtered ("\n");
3237 do_cleanups (cleanups);
3240 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
3241 non-zero compare only lbasename of FILES. */
3244 file_matches (const char *file, char *files[], int nfiles, int basenames)
3248 if (file != NULL && nfiles != 0)
3250 for (i = 0; i < nfiles; i++)
3252 if (compare_filenames_for_search (file, (basenames
3253 ? lbasename (files[i])
3258 else if (nfiles == 0)
3263 /* Free any memory associated with a search. */
3266 free_search_symbols (struct symbol_search *symbols)
3268 struct symbol_search *p;
3269 struct symbol_search *next;
3271 for (p = symbols; p != NULL; p = next)
3279 do_free_search_symbols_cleanup (void *symbols)
3281 free_search_symbols (symbols);
3285 make_cleanup_free_search_symbols (struct symbol_search *symbols)
3287 return make_cleanup (do_free_search_symbols_cleanup, symbols);
3290 /* Helper function for sort_search_symbols and qsort. Can only
3291 sort symbols, not minimal symbols. */
3294 compare_search_syms (const void *sa, const void *sb)
3296 struct symbol_search **sym_a = (struct symbol_search **) sa;
3297 struct symbol_search **sym_b = (struct symbol_search **) sb;
3299 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
3300 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
3303 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3304 prevtail where it is, but update its next pointer to point to
3305 the first of the sorted symbols. */
3307 static struct symbol_search *
3308 sort_search_symbols (struct symbol_search *prevtail, int nfound)
3310 struct symbol_search **symbols, *symp, *old_next;
3313 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
3315 symp = prevtail->next;
3316 for (i = 0; i < nfound; i++)
3321 /* Generally NULL. */
3324 qsort (symbols, nfound, sizeof (struct symbol_search *),
3325 compare_search_syms);
3328 for (i = 0; i < nfound; i++)
3330 symp->next = symbols[i];
3333 symp->next = old_next;
3339 /* An object of this type is passed as the user_data to the
3340 expand_symtabs_matching method. */
3341 struct search_symbols_data
3346 /* It is true if PREG contains valid data, false otherwise. */
3347 unsigned preg_p : 1;
3351 /* A callback for expand_symtabs_matching. */
3354 search_symbols_file_matches (const char *filename, void *user_data,
3357 struct search_symbols_data *data = user_data;
3359 return file_matches (filename, data->files, data->nfiles, basenames);
3362 /* A callback for expand_symtabs_matching. */
3365 search_symbols_name_matches (const char *symname, void *user_data)
3367 struct search_symbols_data *data = user_data;
3369 return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0;
3372 /* Search the symbol table for matches to the regular expression REGEXP,
3373 returning the results in *MATCHES.
3375 Only symbols of KIND are searched:
3376 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3377 and constants (enums)
3378 FUNCTIONS_DOMAIN - search all functions
3379 TYPES_DOMAIN - search all type names
3380 ALL_DOMAIN - an internal error for this function
3382 free_search_symbols should be called when *MATCHES is no longer needed.
3384 The results are sorted locally; each symtab's global and static blocks are
3385 separately alphabetized. */
3388 search_symbols (char *regexp, enum search_domain kind,
3389 int nfiles, char *files[],
3390 struct symbol_search **matches)
3393 struct blockvector *bv;
3396 struct block_iterator iter;
3398 struct objfile *objfile;
3399 struct minimal_symbol *msymbol;
3401 static const enum minimal_symbol_type types[]
3402 = {mst_data, mst_text, mst_abs};
3403 static const enum minimal_symbol_type types2[]
3404 = {mst_bss, mst_file_text, mst_abs};
3405 static const enum minimal_symbol_type types3[]
3406 = {mst_file_data, mst_solib_trampoline, mst_abs};
3407 static const enum minimal_symbol_type types4[]
3408 = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
3409 enum minimal_symbol_type ourtype;
3410 enum minimal_symbol_type ourtype2;
3411 enum minimal_symbol_type ourtype3;
3412 enum minimal_symbol_type ourtype4;
3413 struct symbol_search *sr;
3414 struct symbol_search *psr;
3415 struct symbol_search *tail;
3416 struct search_symbols_data datum;
3418 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3419 CLEANUP_CHAIN is freed only in the case of an error. */
3420 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
3421 struct cleanup *retval_chain;
3423 gdb_assert (kind <= TYPES_DOMAIN);
3425 ourtype = types[kind];
3426 ourtype2 = types2[kind];
3427 ourtype3 = types3[kind];
3428 ourtype4 = types4[kind];
3430 sr = *matches = NULL;
3436 /* Make sure spacing is right for C++ operators.
3437 This is just a courtesy to make the matching less sensitive
3438 to how many spaces the user leaves between 'operator'
3439 and <TYPENAME> or <OPERATOR>. */
3441 char *opname = operator_chars (regexp, &opend);
3446 int fix = -1; /* -1 means ok; otherwise number of
3449 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3451 /* There should 1 space between 'operator' and 'TYPENAME'. */
3452 if (opname[-1] != ' ' || opname[-2] == ' ')
3457 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3458 if (opname[-1] == ' ')
3461 /* If wrong number of spaces, fix it. */
3464 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3466 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3471 errcode = regcomp (&datum.preg, regexp,
3472 REG_NOSUB | (case_sensitivity == case_sensitive_off
3476 char *err = get_regcomp_error (errcode, &datum.preg);
3478 make_cleanup (xfree, err);
3479 error (_("Invalid regexp (%s): %s"), err, regexp);
3482 make_regfree_cleanup (&datum.preg);
3485 /* Search through the partial symtabs *first* for all symbols
3486 matching the regexp. That way we don't have to reproduce all of
3487 the machinery below. */
3489 datum.nfiles = nfiles;
3490 datum.files = files;
3491 ALL_OBJFILES (objfile)
3494 objfile->sf->qf->expand_symtabs_matching (objfile,
3497 : search_symbols_file_matches),
3498 search_symbols_name_matches,
3503 retval_chain = old_chain;
3505 /* Here, we search through the minimal symbol tables for functions
3506 and variables that match, and force their symbols to be read.
3507 This is in particular necessary for demangled variable names,
3508 which are no longer put into the partial symbol tables.
3509 The symbol will then be found during the scan of symtabs below.
3511 For functions, find_pc_symtab should succeed if we have debug info
3512 for the function, for variables we have to call
3513 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3515 If the lookup fails, set found_misc so that we will rescan to print
3516 any matching symbols without debug info.
3517 We only search the objfile the msymbol came from, we no longer search
3518 all objfiles. In large programs (1000s of shared libs) searching all
3519 objfiles is not worth the pain. */
3521 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3523 ALL_MSYMBOLS (objfile, msymbol)
3527 if (msymbol->created_by_gdb)
3530 if (MSYMBOL_TYPE (msymbol) == ourtype
3531 || MSYMBOL_TYPE (msymbol) == ourtype2
3532 || MSYMBOL_TYPE (msymbol) == ourtype3
3533 || MSYMBOL_TYPE (msymbol) == ourtype4)
3536 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3539 /* Note: An important side-effect of these lookup functions
3540 is to expand the symbol table if msymbol is found, for the
3541 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3542 if (kind == FUNCTIONS_DOMAIN
3543 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL
3544 : (lookup_symbol_in_objfile_from_linkage_name
3545 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3553 ALL_PRIMARY_SYMTABS (objfile, s)
3555 bv = BLOCKVECTOR (s);
3556 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3558 struct symbol_search *prevtail = tail;
3561 b = BLOCKVECTOR_BLOCK (bv, i);
3562 ALL_BLOCK_SYMBOLS (b, iter, sym)
3564 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3568 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
3569 a substring of symtab_to_fullname as it may contain "./" etc. */
3570 if ((file_matches (real_symtab->filename, files, nfiles, 0)
3571 || ((basenames_may_differ
3572 || file_matches (lbasename (real_symtab->filename),
3574 && file_matches (symtab_to_fullname (real_symtab),
3577 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0,
3579 && ((kind == VARIABLES_DOMAIN
3580 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3581 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
3582 && SYMBOL_CLASS (sym) != LOC_BLOCK
3583 /* LOC_CONST can be used for more than just enums,
3584 e.g., c++ static const members.
3585 We only want to skip enums here. */
3586 && !(SYMBOL_CLASS (sym) == LOC_CONST
3587 && TYPE_CODE (SYMBOL_TYPE (sym))
3589 || (kind == FUNCTIONS_DOMAIN
3590 && SYMBOL_CLASS (sym) == LOC_BLOCK)
3591 || (kind == TYPES_DOMAIN
3592 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
3595 psr = (struct symbol_search *)
3596 xmalloc (sizeof (struct symbol_search));
3598 psr->symtab = real_symtab;
3600 psr->msymbol = NULL;
3612 if (prevtail == NULL)
3614 struct symbol_search dummy;
3617 tail = sort_search_symbols (&dummy, nfound);
3620 make_cleanup_free_search_symbols (sr);
3623 tail = sort_search_symbols (prevtail, nfound);
3628 /* If there are no eyes, avoid all contact. I mean, if there are
3629 no debug symbols, then print directly from the msymbol_vector. */
3631 if (found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
3633 ALL_MSYMBOLS (objfile, msymbol)
3637 if (msymbol->created_by_gdb)
3640 if (MSYMBOL_TYPE (msymbol) == ourtype
3641 || MSYMBOL_TYPE (msymbol) == ourtype2
3642 || MSYMBOL_TYPE (msymbol) == ourtype3
3643 || MSYMBOL_TYPE (msymbol) == ourtype4)
3646 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3649 /* For functions we can do a quick check of whether the
3650 symbol might be found via find_pc_symtab. */
3651 if (kind != FUNCTIONS_DOMAIN
3652 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL)
3654 if (lookup_symbol_in_objfile_from_linkage_name
3655 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3659 psr = (struct symbol_search *)
3660 xmalloc (sizeof (struct symbol_search));
3662 psr->msymbol = msymbol;
3669 make_cleanup_free_search_symbols (sr);
3681 discard_cleanups (retval_chain);
3682 do_cleanups (old_chain);
3686 /* Helper function for symtab_symbol_info, this function uses
3687 the data returned from search_symbols() to print information
3688 regarding the match to gdb_stdout. */
3691 print_symbol_info (enum search_domain kind,
3692 struct symtab *s, struct symbol *sym,
3693 int block, const char *last)
3695 const char *s_filename = symtab_to_filename_for_display (s);
3697 if (last == NULL || filename_cmp (last, s_filename) != 0)
3699 fputs_filtered ("\nFile ", gdb_stdout);
3700 fputs_filtered (s_filename, gdb_stdout);
3701 fputs_filtered (":\n", gdb_stdout);
3704 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3705 printf_filtered ("static ");
3707 /* Typedef that is not a C++ class. */
3708 if (kind == TYPES_DOMAIN
3709 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3710 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3711 /* variable, func, or typedef-that-is-c++-class. */
3712 else if (kind < TYPES_DOMAIN
3713 || (kind == TYPES_DOMAIN
3714 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3716 type_print (SYMBOL_TYPE (sym),
3717 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3718 ? "" : SYMBOL_PRINT_NAME (sym)),
3721 printf_filtered (";\n");
3725 /* This help function for symtab_symbol_info() prints information
3726 for non-debugging symbols to gdb_stdout. */
3729 print_msymbol_info (struct minimal_symbol *msymbol)
3731 struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
3734 if (gdbarch_addr_bit (gdbarch) <= 32)
3735 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3736 & (CORE_ADDR) 0xffffffff,
3739 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3741 printf_filtered ("%s %s\n",
3742 tmp, SYMBOL_PRINT_NAME (msymbol));
3745 /* This is the guts of the commands "info functions", "info types", and
3746 "info variables". It calls search_symbols to find all matches and then
3747 print_[m]symbol_info to print out some useful information about the
3751 symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty)
3753 static const char * const classnames[] =
3754 {"variable", "function", "type"};
3755 struct symbol_search *symbols;
3756 struct symbol_search *p;
3757 struct cleanup *old_chain;
3758 const char *last_filename = NULL;
3761 gdb_assert (kind <= TYPES_DOMAIN);
3763 /* Must make sure that if we're interrupted, symbols gets freed. */
3764 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3765 old_chain = make_cleanup_free_search_symbols (symbols);
3768 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
3769 classnames[kind], regexp);
3771 printf_filtered (_("All defined %ss:\n"), classnames[kind]);
3773 for (p = symbols; p != NULL; p = p->next)
3777 if (p->msymbol != NULL)
3781 printf_filtered (_("\nNon-debugging symbols:\n"));
3784 print_msymbol_info (p->msymbol);
3788 print_symbol_info (kind,
3793 last_filename = symtab_to_filename_for_display (p->symtab);
3797 do_cleanups (old_chain);
3801 variables_info (char *regexp, int from_tty)
3803 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3807 functions_info (char *regexp, int from_tty)
3809 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3814 types_info (char *regexp, int from_tty)
3816 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3819 /* Breakpoint all functions matching regular expression. */
3822 rbreak_command_wrapper (char *regexp, int from_tty)
3824 rbreak_command (regexp, from_tty);
3827 /* A cleanup function that calls end_rbreak_breakpoints. */
3830 do_end_rbreak_breakpoints (void *ignore)
3832 end_rbreak_breakpoints ();
3836 rbreak_command (char *regexp, int from_tty)
3838 struct symbol_search *ss;
3839 struct symbol_search *p;
3840 struct cleanup *old_chain;
3841 char *string = NULL;
3843 char **files = NULL, *file_name;
3848 char *colon = strchr (regexp, ':');
3850 if (colon && *(colon + 1) != ':')
3854 colon_index = colon - regexp;
3855 file_name = alloca (colon_index + 1);
3856 memcpy (file_name, regexp, colon_index);
3857 file_name[colon_index--] = 0;
3858 while (isspace (file_name[colon_index]))
3859 file_name[colon_index--] = 0;
3862 regexp = skip_spaces (colon + 1);
3866 search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss);
3867 old_chain = make_cleanup_free_search_symbols (ss);
3868 make_cleanup (free_current_contents, &string);
3870 start_rbreak_breakpoints ();
3871 make_cleanup (do_end_rbreak_breakpoints, NULL);
3872 for (p = ss; p != NULL; p = p->next)
3874 if (p->msymbol == NULL)
3876 const char *fullname = symtab_to_fullname (p->symtab);
3878 int newlen = (strlen (fullname)
3879 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3884 string = xrealloc (string, newlen);
3887 strcpy (string, fullname);
3888 strcat (string, ":'");
3889 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3890 strcat (string, "'");
3891 break_command (string, from_tty);
3892 print_symbol_info (FUNCTIONS_DOMAIN,
3896 symtab_to_filename_for_display (p->symtab));
3900 int newlen = (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) + 3);
3904 string = xrealloc (string, newlen);
3907 strcpy (string, "'");
3908 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3909 strcat (string, "'");
3911 break_command (string, from_tty);
3912 printf_filtered ("<function, no debug info> %s;\n",
3913 SYMBOL_PRINT_NAME (p->msymbol));
3917 do_cleanups (old_chain);
3921 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3923 Either sym_text[sym_text_len] != '(' and then we search for any
3924 symbol starting with SYM_TEXT text.
3926 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3927 be terminated at that point. Partial symbol tables do not have parameters
3931 compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
3933 int (*ncmp) (const char *, const char *, size_t);
3935 ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp);
3937 if (ncmp (name, sym_text, sym_text_len) != 0)
3940 if (sym_text[sym_text_len] == '(')
3942 /* User searches for `name(someth...'. Require NAME to be terminated.
3943 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3944 present but accept even parameters presence. In this case this
3945 function is in fact strcmp_iw but whitespace skipping is not supported
3946 for tab completion. */
3948 if (name[sym_text_len] != '\0' && name[sym_text_len] != '(')
3955 /* Free any memory associated with a completion list. */
3958 free_completion_list (VEC (char_ptr) **list_ptr)
3963 for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i)
3965 VEC_free (char_ptr, *list_ptr);
3968 /* Callback for make_cleanup. */
3971 do_free_completion_list (void *list)
3973 free_completion_list (list);
3976 /* Helper routine for make_symbol_completion_list. */
3978 static VEC (char_ptr) *return_val;
3980 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3981 completion_list_add_name \
3982 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3984 /* Test to see if the symbol specified by SYMNAME (which is already
3985 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3986 characters. If so, add it to the current completion list. */
3989 completion_list_add_name (const char *symname,
3990 const char *sym_text, int sym_text_len,
3991 const char *text, const char *word)
3993 /* Clip symbols that cannot match. */
3994 if (!compare_symbol_name (symname, sym_text, sym_text_len))
3997 /* We have a match for a completion, so add SYMNAME to the current list
3998 of matches. Note that the name is moved to freshly malloc'd space. */
4003 if (word == sym_text)
4005 new = xmalloc (strlen (symname) + 5);
4006 strcpy (new, symname);
4008 else if (word > sym_text)
4010 /* Return some portion of symname. */
4011 new = xmalloc (strlen (symname) + 5);
4012 strcpy (new, symname + (word - sym_text));
4016 /* Return some of SYM_TEXT plus symname. */
4017 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
4018 strncpy (new, word, sym_text - word);
4019 new[sym_text - word] = '\0';
4020 strcat (new, symname);
4023 VEC_safe_push (char_ptr, return_val, new);
4027 /* ObjC: In case we are completing on a selector, look as the msymbol
4028 again and feed all the selectors into the mill. */
4031 completion_list_objc_symbol (struct minimal_symbol *msymbol,
4032 const char *sym_text, int sym_text_len,
4033 const char *text, const char *word)
4035 static char *tmp = NULL;
4036 static unsigned int tmplen = 0;
4038 const char *method, *category, *selector;
4041 method = SYMBOL_NATURAL_NAME (msymbol);
4043 /* Is it a method? */
4044 if ((method[0] != '-') && (method[0] != '+'))
4047 if (sym_text[0] == '[')
4048 /* Complete on shortened method method. */
4049 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
4051 while ((strlen (method) + 1) >= tmplen)
4057 tmp = xrealloc (tmp, tmplen);
4059 selector = strchr (method, ' ');
4060 if (selector != NULL)
4063 category = strchr (method, '(');
4065 if ((category != NULL) && (selector != NULL))
4067 memcpy (tmp, method, (category - method));
4068 tmp[category - method] = ' ';
4069 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
4070 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4071 if (sym_text[0] == '[')
4072 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
4075 if (selector != NULL)
4077 /* Complete on selector only. */
4078 strcpy (tmp, selector);
4079 tmp2 = strchr (tmp, ']');
4083 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4087 /* Break the non-quoted text based on the characters which are in
4088 symbols. FIXME: This should probably be language-specific. */
4091 language_search_unquoted_string (const char *text, const char *p)
4093 for (; p > text; --p)
4095 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
4099 if ((current_language->la_language == language_objc))
4101 if (p[-1] == ':') /* Might be part of a method name. */
4103 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
4104 p -= 2; /* Beginning of a method name. */
4105 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
4106 { /* Might be part of a method name. */
4109 /* Seeing a ' ' or a '(' is not conclusive evidence
4110 that we are in the middle of a method name. However,
4111 finding "-[" or "+[" should be pretty un-ambiguous.
4112 Unfortunately we have to find it now to decide. */
4115 if (isalnum (t[-1]) || t[-1] == '_' ||
4116 t[-1] == ' ' || t[-1] == ':' ||
4117 t[-1] == '(' || t[-1] == ')')
4122 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
4123 p = t - 2; /* Method name detected. */
4124 /* Else we leave with p unchanged. */
4134 completion_list_add_fields (struct symbol *sym, const char *sym_text,
4135 int sym_text_len, const char *text,
4138 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4140 struct type *t = SYMBOL_TYPE (sym);
4141 enum type_code c = TYPE_CODE (t);
4144 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
4145 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
4146 if (TYPE_FIELD_NAME (t, j))
4147 completion_list_add_name (TYPE_FIELD_NAME (t, j),
4148 sym_text, sym_text_len, text, word);
4152 /* Type of the user_data argument passed to add_macro_name or
4153 expand_partial_symbol_name. The contents are simply whatever is
4154 needed by completion_list_add_name. */
4155 struct add_name_data
4157 const char *sym_text;
4163 /* A callback used with macro_for_each and macro_for_each_in_scope.
4164 This adds a macro's name to the current completion list. */
4167 add_macro_name (const char *name, const struct macro_definition *ignore,
4168 struct macro_source_file *ignore2, int ignore3,
4171 struct add_name_data *datum = (struct add_name_data *) user_data;
4173 completion_list_add_name ((char *) name,
4174 datum->sym_text, datum->sym_text_len,
4175 datum->text, datum->word);
4178 /* A callback for expand_partial_symbol_names. */
4181 expand_partial_symbol_name (const char *name, void *user_data)
4183 struct add_name_data *datum = (struct add_name_data *) user_data;
4185 return compare_symbol_name (name, datum->sym_text, datum->sym_text_len);
4189 default_make_symbol_completion_list_break_on (const char *text,
4191 const char *break_on,
4192 enum type_code code)
4194 /* Problem: All of the symbols have to be copied because readline
4195 frees them. I'm not going to worry about this; hopefully there
4196 won't be that many. */
4200 struct minimal_symbol *msymbol;
4201 struct objfile *objfile;
4203 const struct block *surrounding_static_block, *surrounding_global_block;
4204 struct block_iterator iter;
4205 /* The symbol we are completing on. Points in same buffer as text. */
4206 const char *sym_text;
4207 /* Length of sym_text. */
4209 struct add_name_data datum;
4210 struct cleanup *back_to;
4212 /* Now look for the symbol we are supposed to complete on. */
4216 const char *quote_pos = NULL;
4218 /* First see if this is a quoted string. */
4220 for (p = text; *p != '\0'; ++p)
4222 if (quote_found != '\0')
4224 if (*p == quote_found)
4225 /* Found close quote. */
4227 else if (*p == '\\' && p[1] == quote_found)
4228 /* A backslash followed by the quote character
4229 doesn't end the string. */
4232 else if (*p == '\'' || *p == '"')
4238 if (quote_found == '\'')
4239 /* A string within single quotes can be a symbol, so complete on it. */
4240 sym_text = quote_pos + 1;
4241 else if (quote_found == '"')
4242 /* A double-quoted string is never a symbol, nor does it make sense
4243 to complete it any other way. */
4249 /* It is not a quoted string. Break it based on the characters
4250 which are in symbols. */
4253 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
4254 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
4263 sym_text_len = strlen (sym_text);
4265 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4267 if (current_language->la_language == language_cplus
4268 || current_language->la_language == language_java
4269 || current_language->la_language == language_fortran)
4271 /* These languages may have parameters entered by user but they are never
4272 present in the partial symbol tables. */
4274 const char *cs = memchr (sym_text, '(', sym_text_len);
4277 sym_text_len = cs - sym_text;
4279 gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
4282 back_to = make_cleanup (do_free_completion_list, &return_val);
4284 datum.sym_text = sym_text;
4285 datum.sym_text_len = sym_text_len;
4289 /* Look through the partial symtabs for all symbols which begin
4290 by matching SYM_TEXT. Expand all CUs that you find to the list.
4291 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4292 expand_partial_symbol_names (expand_partial_symbol_name, &datum);
4294 /* At this point scan through the misc symbol vectors and add each
4295 symbol you find to the list. Eventually we want to ignore
4296 anything that isn't a text symbol (everything else will be
4297 handled by the psymtab code above). */
4299 if (code == TYPE_CODE_UNDEF)
4301 ALL_MSYMBOLS (objfile, msymbol)
4304 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text,
4307 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text,
4312 /* Search upwards from currently selected frame (so that we can
4313 complete on local vars). Also catch fields of types defined in
4314 this places which match our text string. Only complete on types
4315 visible from current context. */
4317 b = get_selected_block (0);
4318 surrounding_static_block = block_static_block (b);
4319 surrounding_global_block = block_global_block (b);
4320 if (surrounding_static_block != NULL)
4321 while (b != surrounding_static_block)
4325 ALL_BLOCK_SYMBOLS (b, iter, sym)
4327 if (code == TYPE_CODE_UNDEF)
4329 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4331 completion_list_add_fields (sym, sym_text, sym_text_len, text,
4334 else if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4335 && TYPE_CODE (SYMBOL_TYPE (sym)) == code)
4336 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4340 /* Stop when we encounter an enclosing function. Do not stop for
4341 non-inlined functions - the locals of the enclosing function
4342 are in scope for a nested function. */
4343 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
4345 b = BLOCK_SUPERBLOCK (b);
4348 /* Add fields from the file's types; symbols will be added below. */
4350 if (code == TYPE_CODE_UNDEF)
4352 if (surrounding_static_block != NULL)
4353 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
4354 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4356 if (surrounding_global_block != NULL)
4357 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
4358 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4361 /* Go through the symtabs and check the externs and statics for
4362 symbols which match. */
4364 ALL_PRIMARY_SYMTABS (objfile, s)
4367 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4368 ALL_BLOCK_SYMBOLS (b, iter, sym)
4370 if (code == TYPE_CODE_UNDEF
4371 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4372 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
4373 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4377 ALL_PRIMARY_SYMTABS (objfile, s)
4380 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4381 ALL_BLOCK_SYMBOLS (b, iter, sym)
4383 if (code == TYPE_CODE_UNDEF
4384 || (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN
4385 && TYPE_CODE (SYMBOL_TYPE (sym)) == code))
4386 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4390 /* Skip macros if we are completing a struct tag -- arguable but
4391 usually what is expected. */
4392 if (current_language->la_macro_expansion == macro_expansion_c
4393 && code == TYPE_CODE_UNDEF)
4395 struct macro_scope *scope;
4397 /* Add any macros visible in the default scope. Note that this
4398 may yield the occasional wrong result, because an expression
4399 might be evaluated in a scope other than the default. For
4400 example, if the user types "break file:line if <TAB>", the
4401 resulting expression will be evaluated at "file:line" -- but
4402 at there does not seem to be a way to detect this at
4404 scope = default_macro_scope ();
4407 macro_for_each_in_scope (scope->file, scope->line,
4408 add_macro_name, &datum);
4412 /* User-defined macros are always visible. */
4413 macro_for_each (macro_user_macros, add_macro_name, &datum);
4416 discard_cleanups (back_to);
4417 return (return_val);
4421 default_make_symbol_completion_list (const char *text, const char *word,
4422 enum type_code code)
4424 return default_make_symbol_completion_list_break_on (text, word, "", code);
4427 /* Return a vector of all symbols (regardless of class) which begin by
4428 matching TEXT. If the answer is no symbols, then the return value
4432 make_symbol_completion_list (const char *text, const char *word)
4434 return current_language->la_make_symbol_completion_list (text, word,
4438 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
4439 symbols whose type code is CODE. */
4442 make_symbol_completion_type (const char *text, const char *word,
4443 enum type_code code)
4445 gdb_assert (code == TYPE_CODE_UNION
4446 || code == TYPE_CODE_STRUCT
4447 || code == TYPE_CODE_CLASS
4448 || code == TYPE_CODE_ENUM);
4449 return current_language->la_make_symbol_completion_list (text, word, code);
4452 /* Like make_symbol_completion_list, but suitable for use as a
4453 completion function. */
4456 make_symbol_completion_list_fn (struct cmd_list_element *ignore,
4457 const char *text, const char *word)
4459 return make_symbol_completion_list (text, word);
4462 /* Like make_symbol_completion_list, but returns a list of symbols
4463 defined in a source file FILE. */
4466 make_file_symbol_completion_list (const char *text, const char *word,
4467 const char *srcfile)
4472 struct block_iterator iter;
4473 /* The symbol we are completing on. Points in same buffer as text. */
4474 const char *sym_text;
4475 /* Length of sym_text. */
4478 /* Now look for the symbol we are supposed to complete on.
4479 FIXME: This should be language-specific. */
4483 const char *quote_pos = NULL;
4485 /* First see if this is a quoted string. */
4487 for (p = text; *p != '\0'; ++p)
4489 if (quote_found != '\0')
4491 if (*p == quote_found)
4492 /* Found close quote. */
4494 else if (*p == '\\' && p[1] == quote_found)
4495 /* A backslash followed by the quote character
4496 doesn't end the string. */
4499 else if (*p == '\'' || *p == '"')
4505 if (quote_found == '\'')
4506 /* A string within single quotes can be a symbol, so complete on it. */
4507 sym_text = quote_pos + 1;
4508 else if (quote_found == '"')
4509 /* A double-quoted string is never a symbol, nor does it make sense
4510 to complete it any other way. */
4516 /* Not a quoted string. */
4517 sym_text = language_search_unquoted_string (text, p);
4521 sym_text_len = strlen (sym_text);
4525 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4527 s = lookup_symtab (srcfile);
4530 /* Maybe they typed the file with leading directories, while the
4531 symbol tables record only its basename. */
4532 const char *tail = lbasename (srcfile);
4535 s = lookup_symtab (tail);
4538 /* If we have no symtab for that file, return an empty list. */
4540 return (return_val);
4542 /* Go through this symtab and check the externs and statics for
4543 symbols which match. */
4545 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4546 ALL_BLOCK_SYMBOLS (b, iter, sym)
4548 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4551 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4552 ALL_BLOCK_SYMBOLS (b, iter, sym)
4554 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4557 return (return_val);
4560 /* A helper function for make_source_files_completion_list. It adds
4561 another file name to a list of possible completions, growing the
4562 list as necessary. */
4565 add_filename_to_list (const char *fname, const char *text, const char *word,
4566 VEC (char_ptr) **list)
4569 size_t fnlen = strlen (fname);
4573 /* Return exactly fname. */
4574 new = xmalloc (fnlen + 5);
4575 strcpy (new, fname);
4577 else if (word > text)
4579 /* Return some portion of fname. */
4580 new = xmalloc (fnlen + 5);
4581 strcpy (new, fname + (word - text));
4585 /* Return some of TEXT plus fname. */
4586 new = xmalloc (fnlen + (text - word) + 5);
4587 strncpy (new, word, text - word);
4588 new[text - word] = '\0';
4589 strcat (new, fname);
4591 VEC_safe_push (char_ptr, *list, new);
4595 not_interesting_fname (const char *fname)
4597 static const char *illegal_aliens[] = {
4598 "_globals_", /* inserted by coff_symtab_read */
4603 for (i = 0; illegal_aliens[i]; i++)
4605 if (filename_cmp (fname, illegal_aliens[i]) == 0)
4611 /* An object of this type is passed as the user_data argument to
4612 map_partial_symbol_filenames. */
4613 struct add_partial_filename_data
4615 struct filename_seen_cache *filename_seen_cache;
4619 VEC (char_ptr) **list;
4622 /* A callback for map_partial_symbol_filenames. */
4625 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
4628 struct add_partial_filename_data *data = user_data;
4630 if (not_interesting_fname (filename))
4632 if (!filename_seen (data->filename_seen_cache, filename, 1)
4633 && filename_ncmp (filename, data->text, data->text_len) == 0)
4635 /* This file matches for a completion; add it to the
4636 current list of matches. */
4637 add_filename_to_list (filename, data->text, data->word, data->list);
4641 const char *base_name = lbasename (filename);
4643 if (base_name != filename
4644 && !filename_seen (data->filename_seen_cache, base_name, 1)
4645 && filename_ncmp (base_name, data->text, data->text_len) == 0)
4646 add_filename_to_list (base_name, data->text, data->word, data->list);
4650 /* Return a vector of all source files whose names begin with matching
4651 TEXT. The file names are looked up in the symbol tables of this
4652 program. If the answer is no matchess, then the return value is
4656 make_source_files_completion_list (const char *text, const char *word)
4659 struct objfile *objfile;
4660 size_t text_len = strlen (text);
4661 VEC (char_ptr) *list = NULL;
4662 const char *base_name;
4663 struct add_partial_filename_data datum;
4664 struct filename_seen_cache *filename_seen_cache;
4665 struct cleanup *back_to, *cache_cleanup;
4667 if (!have_full_symbols () && !have_partial_symbols ())
4670 back_to = make_cleanup (do_free_completion_list, &list);
4672 filename_seen_cache = create_filename_seen_cache ();
4673 cache_cleanup = make_cleanup (delete_filename_seen_cache,
4674 filename_seen_cache);
4676 ALL_SYMTABS (objfile, s)
4678 if (not_interesting_fname (s->filename))
4680 if (!filename_seen (filename_seen_cache, s->filename, 1)
4681 && filename_ncmp (s->filename, text, text_len) == 0)
4683 /* This file matches for a completion; add it to the current
4685 add_filename_to_list (s->filename, text, word, &list);
4689 /* NOTE: We allow the user to type a base name when the
4690 debug info records leading directories, but not the other
4691 way around. This is what subroutines of breakpoint
4692 command do when they parse file names. */
4693 base_name = lbasename (s->filename);
4694 if (base_name != s->filename
4695 && !filename_seen (filename_seen_cache, base_name, 1)
4696 && filename_ncmp (base_name, text, text_len) == 0)
4697 add_filename_to_list (base_name, text, word, &list);
4701 datum.filename_seen_cache = filename_seen_cache;
4704 datum.text_len = text_len;
4706 map_partial_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
4707 0 /*need_fullname*/);
4709 do_cleanups (cache_cleanup);
4710 discard_cleanups (back_to);
4715 /* Determine if PC is in the prologue of a function. The prologue is the area
4716 between the first instruction of a function, and the first executable line.
4717 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4719 If non-zero, func_start is where we think the prologue starts, possibly
4720 by previous examination of symbol table information. */
4723 in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
4725 struct symtab_and_line sal;
4726 CORE_ADDR func_addr, func_end;
4728 /* We have several sources of information we can consult to figure
4730 - Compilers usually emit line number info that marks the prologue
4731 as its own "source line". So the ending address of that "line"
4732 is the end of the prologue. If available, this is the most
4734 - The minimal symbols and partial symbols, which can usually tell
4735 us the starting and ending addresses of a function.
4736 - If we know the function's start address, we can call the
4737 architecture-defined gdbarch_skip_prologue function to analyze the
4738 instruction stream and guess where the prologue ends.
4739 - Our `func_start' argument; if non-zero, this is the caller's
4740 best guess as to the function's entry point. At the time of
4741 this writing, handle_inferior_event doesn't get this right, so
4742 it should be our last resort. */
4744 /* Consult the partial symbol table, to find which function
4746 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4748 CORE_ADDR prologue_end;
4750 /* We don't even have minsym information, so fall back to using
4751 func_start, if given. */
4753 return 1; /* We *might* be in a prologue. */
4755 prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
4757 return func_start <= pc && pc < prologue_end;
4760 /* If we have line number information for the function, that's
4761 usually pretty reliable. */
4762 sal = find_pc_line (func_addr, 0);
4764 /* Now sal describes the source line at the function's entry point,
4765 which (by convention) is the prologue. The end of that "line",
4766 sal.end, is the end of the prologue.
4768 Note that, for functions whose source code is all on a single
4769 line, the line number information doesn't always end up this way.
4770 So we must verify that our purported end-of-prologue address is
4771 *within* the function, not at its start or end. */
4773 || sal.end <= func_addr
4774 || func_end <= sal.end)
4776 /* We don't have any good line number info, so use the minsym
4777 information, together with the architecture-specific prologue
4779 CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
4781 return func_addr <= pc && pc < prologue_end;
4784 /* We have line number info, and it looks good. */
4785 return func_addr <= pc && pc < sal.end;
4788 /* Given PC at the function's start address, attempt to find the
4789 prologue end using SAL information. Return zero if the skip fails.
4791 A non-optimized prologue traditionally has one SAL for the function
4792 and a second for the function body. A single line function has
4793 them both pointing at the same line.
4795 An optimized prologue is similar but the prologue may contain
4796 instructions (SALs) from the instruction body. Need to skip those
4797 while not getting into the function body.
4799 The functions end point and an increasing SAL line are used as
4800 indicators of the prologue's endpoint.
4802 This code is based on the function refine_prologue_limit
4806 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
4808 struct symtab_and_line prologue_sal;
4813 /* Get an initial range for the function. */
4814 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4815 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
4817 prologue_sal = find_pc_line (start_pc, 0);
4818 if (prologue_sal.line != 0)
4820 /* For languages other than assembly, treat two consecutive line
4821 entries at the same address as a zero-instruction prologue.
4822 The GNU assembler emits separate line notes for each instruction
4823 in a multi-instruction macro, but compilers generally will not
4825 if (prologue_sal.symtab->language != language_asm)
4827 struct linetable *linetable = LINETABLE (prologue_sal.symtab);
4830 /* Skip any earlier lines, and any end-of-sequence marker
4831 from a previous function. */
4832 while (linetable->item[idx].pc != prologue_sal.pc
4833 || linetable->item[idx].line == 0)
4836 if (idx+1 < linetable->nitems
4837 && linetable->item[idx+1].line != 0
4838 && linetable->item[idx+1].pc == start_pc)
4842 /* If there is only one sal that covers the entire function,
4843 then it is probably a single line function, like
4845 if (prologue_sal.end >= end_pc)
4848 while (prologue_sal.end < end_pc)
4850 struct symtab_and_line sal;
4852 sal = find_pc_line (prologue_sal.end, 0);
4855 /* Assume that a consecutive SAL for the same (or larger)
4856 line mark the prologue -> body transition. */
4857 if (sal.line >= prologue_sal.line)
4859 /* Likewise if we are in a different symtab altogether
4860 (e.g. within a file included via #include). */
4861 if (sal.symtab != prologue_sal.symtab)
4864 /* The line number is smaller. Check that it's from the
4865 same function, not something inlined. If it's inlined,
4866 then there is no point comparing the line numbers. */
4867 bl = block_for_pc (prologue_sal.end);
4870 if (block_inlined_p (bl))
4872 if (BLOCK_FUNCTION (bl))
4877 bl = BLOCK_SUPERBLOCK (bl);
4882 /* The case in which compiler's optimizer/scheduler has
4883 moved instructions into the prologue. We look ahead in
4884 the function looking for address ranges whose
4885 corresponding line number is less the first one that we
4886 found for the function. This is more conservative then
4887 refine_prologue_limit which scans a large number of SALs
4888 looking for any in the prologue. */
4893 if (prologue_sal.end < end_pc)
4894 /* Return the end of this line, or zero if we could not find a
4896 return prologue_sal.end;
4898 /* Don't return END_PC, which is past the end of the function. */
4899 return prologue_sal.pc;
4903 static char *name_of_main;
4904 enum language language_of_main = language_unknown;
4907 set_main_name (const char *name)
4909 if (name_of_main != NULL)
4911 xfree (name_of_main);
4912 name_of_main = NULL;
4913 language_of_main = language_unknown;
4917 name_of_main = xstrdup (name);
4918 language_of_main = language_unknown;
4922 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4926 find_main_name (void)
4928 const char *new_main_name;
4930 /* Try to see if the main procedure is in Ada. */
4931 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4932 be to add a new method in the language vector, and call this
4933 method for each language until one of them returns a non-empty
4934 name. This would allow us to remove this hard-coded call to
4935 an Ada function. It is not clear that this is a better approach
4936 at this point, because all methods need to be written in a way
4937 such that false positives never be returned. For instance, it is
4938 important that a method does not return a wrong name for the main
4939 procedure if the main procedure is actually written in a different
4940 language. It is easy to guaranty this with Ada, since we use a
4941 special symbol generated only when the main in Ada to find the name
4942 of the main procedure. It is difficult however to see how this can
4943 be guarantied for languages such as C, for instance. This suggests
4944 that order of call for these methods becomes important, which means
4945 a more complicated approach. */
4946 new_main_name = ada_main_name ();
4947 if (new_main_name != NULL)
4949 set_main_name (new_main_name);
4953 new_main_name = go_main_name ();
4954 if (new_main_name != NULL)
4956 set_main_name (new_main_name);
4960 new_main_name = pascal_main_name ();
4961 if (new_main_name != NULL)
4963 set_main_name (new_main_name);
4967 /* The languages above didn't identify the name of the main procedure.
4968 Fallback to "main". */
4969 set_main_name ("main");
4975 if (name_of_main == NULL)
4978 return name_of_main;
4981 /* Handle ``executable_changed'' events for the symtab module. */
4984 symtab_observer_executable_changed (void)
4986 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4987 set_main_name (NULL);
4990 /* Return 1 if the supplied producer string matches the ARM RealView
4991 compiler (armcc). */
4994 producer_is_realview (const char *producer)
4996 static const char *const arm_idents[] = {
4997 "ARM C Compiler, ADS",
4998 "Thumb C Compiler, ADS",
4999 "ARM C++ Compiler, ADS",
5000 "Thumb C++ Compiler, ADS",
5001 "ARM/Thumb C/C++ Compiler, RVCT",
5002 "ARM C/C++ Compiler, RVCT"
5006 if (producer == NULL)
5009 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
5010 if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0)
5018 /* The next index to hand out in response to a registration request. */
5020 static int next_aclass_value = LOC_FINAL_VALUE;
5022 /* The maximum number of "aclass" registrations we support. This is
5023 constant for convenience. */
5024 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5026 /* The objects representing the various "aclass" values. The elements
5027 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5028 elements are those registered at gdb initialization time. */
5030 static struct symbol_impl symbol_impl[MAX_SYMBOL_IMPLS];
5032 /* The globally visible pointer. This is separate from 'symbol_impl'
5033 so that it can be const. */
5035 const struct symbol_impl *symbol_impls = &symbol_impl[0];
5037 /* Make sure we saved enough room in struct symbol. */
5039 gdb_static_assert (MAX_SYMBOL_IMPLS <= (1 << SYMBOL_ACLASS_BITS));
5041 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5042 is the ops vector associated with this index. This returns the new
5043 index, which should be used as the aclass_index field for symbols
5047 register_symbol_computed_impl (enum address_class aclass,
5048 const struct symbol_computed_ops *ops)
5050 int result = next_aclass_value++;
5052 gdb_assert (aclass == LOC_COMPUTED);
5053 gdb_assert (result < MAX_SYMBOL_IMPLS);
5054 symbol_impl[result].aclass = aclass;
5055 symbol_impl[result].ops_computed = ops;
5057 /* Sanity check OPS. */
5058 gdb_assert (ops != NULL);
5059 gdb_assert (ops->tracepoint_var_ref != NULL);
5060 gdb_assert (ops->describe_location != NULL);
5061 gdb_assert (ops->read_needs_frame != NULL);
5062 gdb_assert (ops->read_variable != NULL);
5067 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5068 OPS is the ops vector associated with this index. This returns the
5069 new index, which should be used as the aclass_index field for symbols
5073 register_symbol_block_impl (enum address_class aclass,
5074 const struct symbol_block_ops *ops)
5076 int result = next_aclass_value++;
5078 gdb_assert (aclass == LOC_BLOCK);
5079 gdb_assert (result < MAX_SYMBOL_IMPLS);
5080 symbol_impl[result].aclass = aclass;
5081 symbol_impl[result].ops_block = ops;
5083 /* Sanity check OPS. */
5084 gdb_assert (ops != NULL);
5085 gdb_assert (ops->find_frame_base_location != NULL);
5090 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5091 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5092 this index. This returns the new index, which should be used as
5093 the aclass_index field for symbols of this type. */
5096 register_symbol_register_impl (enum address_class aclass,
5097 const struct symbol_register_ops *ops)
5099 int result = next_aclass_value++;
5101 gdb_assert (aclass == LOC_REGISTER || aclass == LOC_REGPARM_ADDR);
5102 gdb_assert (result < MAX_SYMBOL_IMPLS);
5103 symbol_impl[result].aclass = aclass;
5104 symbol_impl[result].ops_register = ops;
5109 /* Initialize elements of 'symbol_impl' for the constants in enum
5113 initialize_ordinary_address_classes (void)
5117 for (i = 0; i < LOC_FINAL_VALUE; ++i)
5118 symbol_impl[i].aclass = i;
5123 /* Initialize the symbol SYM. */
5126 initialize_symbol (struct symbol *sym)
5128 memset (sym, 0, sizeof (*sym));
5131 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
5135 allocate_symbol (struct objfile *objfile)
5137 struct symbol *result;
5139 result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct symbol);
5144 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
5147 struct template_symbol *
5148 allocate_template_symbol (struct objfile *objfile)
5150 struct template_symbol *result;
5152 result = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct template_symbol);
5160 _initialize_symtab (void)
5162 initialize_ordinary_address_classes ();
5164 add_info ("variables", variables_info, _("\
5165 All global and static variable names, or those matching REGEXP."));
5167 add_com ("whereis", class_info, variables_info, _("\
5168 All global and static variable names, or those matching REGEXP."));
5170 add_info ("functions", functions_info,
5171 _("All function names, or those matching REGEXP."));
5173 /* FIXME: This command has at least the following problems:
5174 1. It prints builtin types (in a very strange and confusing fashion).
5175 2. It doesn't print right, e.g. with
5176 typedef struct foo *FOO
5177 type_print prints "FOO" when we want to make it (in this situation)
5178 print "struct foo *".
5179 I also think "ptype" or "whatis" is more likely to be useful (but if
5180 there is much disagreement "info types" can be fixed). */
5181 add_info ("types", types_info,
5182 _("All type names, or those matching REGEXP."));
5184 add_info ("sources", sources_info,
5185 _("Source files in the program."));
5187 add_com ("rbreak", class_breakpoint, rbreak_command,
5188 _("Set a breakpoint for all functions matching REGEXP."));
5192 add_com ("lf", class_info, sources_info,
5193 _("Source files in the program"));
5194 add_com ("lg", class_info, variables_info, _("\
5195 All global and static variable names, or those matching REGEXP."));
5198 add_setshow_enum_cmd ("multiple-symbols", no_class,
5199 multiple_symbols_modes, &multiple_symbols_mode,
5201 Set the debugger behavior when more than one symbol are possible matches\n\
5202 in an expression."), _("\
5203 Show how the debugger handles ambiguities in expressions."), _("\
5204 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5205 NULL, NULL, &setlist, &showlist);
5207 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
5208 &basenames_may_differ, _("\
5209 Set whether a source file may have multiple base names."), _("\
5210 Show whether a source file may have multiple base names."), _("\
5211 (A \"base name\" is the name of a file with the directory part removed.\n\
5212 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5213 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5214 before comparing them. Canonicalization is an expensive operation,\n\
5215 but it allows the same file be known by more than one base name.\n\
5216 If not set (the default), all source files are assumed to have just\n\
5217 one base name, and gdb will do file name comparisons more efficiently."),
5219 &setlist, &showlist);
5221 add_setshow_boolean_cmd ("symtab-create", no_class, &symtab_create_debug,
5222 _("Set debugging of symbol table creation."),
5223 _("Show debugging of symbol table creation."), _("\
5224 When enabled, debugging messages are printed when building symbol tables."),
5227 &setdebuglist, &showdebuglist);
5229 observer_attach_executable_changed (symtab_observer_executable_changed);