1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2004, 2007-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "call-cmds.h"
31 #include "gdb_regex.h"
32 #include "expression.h"
37 #include "filenames.h" /* for FILENAME_CMP */
38 #include "objc-lang.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"
66 /* Prototypes for local functions */
68 static void rbreak_command (char *, int);
70 static void types_info (char *, int);
72 static void functions_info (char *, int);
74 static void variables_info (char *, int);
76 static void sources_info (char *, int);
78 static int find_line_common (struct linetable *, int, int *, int);
80 static struct symbol *lookup_symbol_aux (const char *name,
81 const struct block *block,
82 const domain_enum domain,
83 enum language language,
84 int *is_a_field_of_this);
87 struct symbol *lookup_symbol_aux_local (const char *name,
88 const struct block *block,
89 const domain_enum domain,
90 enum language language);
93 struct symbol *lookup_symbol_aux_symtabs (int block_index,
95 const domain_enum domain);
98 struct symbol *lookup_symbol_aux_quick (struct objfile *objfile,
101 const domain_enum domain);
103 static void print_msymbol_info (struct minimal_symbol *);
105 void _initialize_symtab (void);
109 /* When non-zero, print debugging messages related to symtab creation. */
110 int symtab_create_debug = 0;
112 /* Non-zero if a file may be known by two different basenames.
113 This is the uncommon case, and significantly slows down gdb.
114 Default set to "off" to not slow down the common case. */
115 int basenames_may_differ = 0;
117 /* Allow the user to configure the debugger behavior with respect
118 to multiple-choice menus when more than one symbol matches during
121 const char multiple_symbols_ask[] = "ask";
122 const char multiple_symbols_all[] = "all";
123 const char multiple_symbols_cancel[] = "cancel";
124 static const char *const multiple_symbols_modes[] =
126 multiple_symbols_ask,
127 multiple_symbols_all,
128 multiple_symbols_cancel,
131 static const char *multiple_symbols_mode = multiple_symbols_all;
133 /* Read-only accessor to AUTO_SELECT_MODE. */
136 multiple_symbols_select_mode (void)
138 return multiple_symbols_mode;
141 /* Block in which the most recently searched-for symbol was found.
142 Might be better to make this a parameter to lookup_symbol and
145 const struct block *block_found;
147 /* See whether FILENAME matches SEARCH_NAME using the rule that we
148 advertise to the user. (The manual's description of linespecs
149 describes what we advertise). SEARCH_LEN is the length of
150 SEARCH_NAME. We assume that SEARCH_NAME is a relative path.
151 Returns true if they match, false otherwise. */
154 compare_filenames_for_search (const char *filename, const char *search_name,
157 int len = strlen (filename);
159 if (len < search_len)
162 /* The tail of FILENAME must match. */
163 if (FILENAME_CMP (filename + len - search_len, search_name) != 0)
166 /* Either the names must completely match, or the character
167 preceding the trailing SEARCH_NAME segment of FILENAME must be a
168 directory separator. */
169 return (len == search_len
170 || IS_DIR_SEPARATOR (filename[len - search_len - 1])
171 || (HAS_DRIVE_SPEC (filename)
172 && STRIP_DRIVE_SPEC (filename) == &filename[len - search_len]));
175 /* Check for a symtab of a specific name by searching some symtabs.
176 This is a helper function for callbacks of iterate_over_symtabs.
178 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
179 are identical to the `map_symtabs_matching_filename' method of
180 quick_symbol_functions.
182 FIRST and AFTER_LAST indicate the range of symtabs to search.
183 AFTER_LAST is one past the last symtab to search; NULL means to
184 search until the end of the list. */
187 iterate_over_some_symtabs (const char *name,
188 const char *full_path,
189 const char *real_path,
190 int (*callback) (struct symtab *symtab,
193 struct symtab *first,
194 struct symtab *after_last)
196 struct symtab *s = NULL;
197 const char* base_name = lbasename (name);
198 int name_len = strlen (name);
199 int is_abs = IS_ABSOLUTE_PATH (name);
201 for (s = first; s != NULL && s != after_last; s = s->next)
203 /* Exact match is always ok. */
204 if (FILENAME_CMP (name, s->filename) == 0)
206 if (callback (s, data))
210 if (!is_abs && compare_filenames_for_search (s->filename, name, name_len))
212 if (callback (s, data))
216 /* Before we invoke realpath, which can get expensive when many
217 files are involved, do a quick comparison of the basenames. */
218 if (! basenames_may_differ
219 && FILENAME_CMP (base_name, lbasename (s->filename)) != 0)
222 /* If the user gave us an absolute path, try to find the file in
223 this symtab and use its absolute path. */
225 if (full_path != NULL)
227 const char *fp = symtab_to_fullname (s);
229 if (fp != NULL && FILENAME_CMP (full_path, fp) == 0)
231 if (callback (s, data))
235 if (fp != NULL && !is_abs && compare_filenames_for_search (fp, name,
238 if (callback (s, data))
243 if (real_path != NULL)
245 char *fullname = symtab_to_fullname (s);
247 if (fullname != NULL)
249 char *rp = gdb_realpath (fullname);
251 make_cleanup (xfree, rp);
252 if (FILENAME_CMP (real_path, rp) == 0)
254 if (callback (s, data))
258 if (!is_abs && compare_filenames_for_search (rp, name, name_len))
260 if (callback (s, data))
270 /* Check for a symtab of a specific name; first in symtabs, then in
271 psymtabs. *If* there is no '/' in the name, a match after a '/'
272 in the symtab filename will also work.
274 Calls CALLBACK with each symtab that is found and with the supplied
275 DATA. If CALLBACK returns true, the search stops. */
278 iterate_over_symtabs (const char *name,
279 int (*callback) (struct symtab *symtab,
283 struct symtab *s = NULL;
284 struct objfile *objfile;
285 char *real_path = NULL;
286 char *full_path = NULL;
287 struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
289 /* Here we are interested in canonicalizing an absolute path, not
290 absolutizing a relative path. */
291 if (IS_ABSOLUTE_PATH (name))
293 full_path = xfullpath (name);
294 make_cleanup (xfree, full_path);
295 real_path = gdb_realpath (name);
296 make_cleanup (xfree, real_path);
299 ALL_OBJFILES (objfile)
301 if (iterate_over_some_symtabs (name, full_path, real_path, callback, data,
302 objfile->symtabs, NULL))
304 do_cleanups (cleanups);
309 /* Same search rules as above apply here, but now we look thru the
312 ALL_OBJFILES (objfile)
315 && objfile->sf->qf->map_symtabs_matching_filename (objfile,
322 do_cleanups (cleanups);
327 do_cleanups (cleanups);
330 /* The callback function used by lookup_symtab. */
333 lookup_symtab_callback (struct symtab *symtab, void *data)
335 struct symtab **result_ptr = data;
337 *result_ptr = symtab;
341 /* A wrapper for iterate_over_symtabs that returns the first matching
345 lookup_symtab (const char *name)
347 struct symtab *result = NULL;
349 iterate_over_symtabs (name, lookup_symtab_callback, &result);
354 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
355 full method name, which consist of the class name (from T), the unadorned
356 method name from METHOD_ID, and the signature for the specific overload,
357 specified by SIGNATURE_ID. Note that this function is g++ specific. */
360 gdb_mangle_name (struct type *type, int method_id, int signature_id)
362 int mangled_name_len;
364 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
365 struct fn_field *method = &f[signature_id];
366 const char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
367 const char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
368 const char *newname = type_name_no_tag (type);
370 /* Does the form of physname indicate that it is the full mangled name
371 of a constructor (not just the args)? */
372 int is_full_physname_constructor;
375 int is_destructor = is_destructor_name (physname);
376 /* Need a new type prefix. */
377 char *const_prefix = method->is_const ? "C" : "";
378 char *volatile_prefix = method->is_volatile ? "V" : "";
380 int len = (newname == NULL ? 0 : strlen (newname));
382 /* Nothing to do if physname already contains a fully mangled v3 abi name
383 or an operator name. */
384 if ((physname[0] == '_' && physname[1] == 'Z')
385 || is_operator_name (field_name))
386 return xstrdup (physname);
388 is_full_physname_constructor = is_constructor_name (physname);
390 is_constructor = is_full_physname_constructor
391 || (newname && strcmp (field_name, newname) == 0);
394 is_destructor = (strncmp (physname, "__dt", 4) == 0);
396 if (is_destructor || is_full_physname_constructor)
398 mangled_name = (char *) xmalloc (strlen (physname) + 1);
399 strcpy (mangled_name, physname);
405 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
407 else if (physname[0] == 't' || physname[0] == 'Q')
409 /* The physname for template and qualified methods already includes
411 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
417 sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
419 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
420 + strlen (buf) + len + strlen (physname) + 1);
422 mangled_name = (char *) xmalloc (mangled_name_len);
424 mangled_name[0] = '\0';
426 strcpy (mangled_name, field_name);
428 strcat (mangled_name, buf);
429 /* If the class doesn't have a name, i.e. newname NULL, then we just
430 mangle it using 0 for the length of the class. Thus it gets mangled
431 as something starting with `::' rather than `classname::'. */
433 strcat (mangled_name, newname);
435 strcat (mangled_name, physname);
436 return (mangled_name);
439 /* Initialize the cplus_specific structure. 'cplus_specific' should
440 only be allocated for use with cplus symbols. */
443 symbol_init_cplus_specific (struct general_symbol_info *gsymbol,
444 struct objfile *objfile)
446 /* A language_specific structure should not have been previously
448 gdb_assert (gsymbol->language_specific.cplus_specific == NULL);
449 gdb_assert (objfile != NULL);
451 gsymbol->language_specific.cplus_specific =
452 OBSTACK_ZALLOC (&objfile->objfile_obstack, struct cplus_specific);
455 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
456 correctly allocated. For C++ symbols a cplus_specific struct is
457 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
458 OBJFILE can be NULL. */
461 symbol_set_demangled_name (struct general_symbol_info *gsymbol,
463 struct objfile *objfile)
465 if (gsymbol->language == language_cplus)
467 if (gsymbol->language_specific.cplus_specific == NULL)
468 symbol_init_cplus_specific (gsymbol, objfile);
470 gsymbol->language_specific.cplus_specific->demangled_name = name;
473 gsymbol->language_specific.mangled_lang.demangled_name = name;
476 /* Return the demangled name of GSYMBOL. */
479 symbol_get_demangled_name (const struct general_symbol_info *gsymbol)
481 if (gsymbol->language == language_cplus)
483 if (gsymbol->language_specific.cplus_specific != NULL)
484 return gsymbol->language_specific.cplus_specific->demangled_name;
489 return gsymbol->language_specific.mangled_lang.demangled_name;
493 /* Initialize the language dependent portion of a symbol
494 depending upon the language for the symbol. */
497 symbol_set_language (struct general_symbol_info *gsymbol,
498 enum language language)
500 gsymbol->language = language;
501 if (gsymbol->language == language_d
502 || gsymbol->language == language_go
503 || gsymbol->language == language_java
504 || gsymbol->language == language_objc
505 || gsymbol->language == language_fortran)
507 symbol_set_demangled_name (gsymbol, NULL, NULL);
509 else if (gsymbol->language == language_cplus)
510 gsymbol->language_specific.cplus_specific = NULL;
513 memset (&gsymbol->language_specific, 0,
514 sizeof (gsymbol->language_specific));
518 /* Functions to initialize a symbol's mangled name. */
520 /* Objects of this type are stored in the demangled name hash table. */
521 struct demangled_name_entry
527 /* Hash function for the demangled name hash. */
530 hash_demangled_name_entry (const void *data)
532 const struct demangled_name_entry *e = data;
534 return htab_hash_string (e->mangled);
537 /* Equality function for the demangled name hash. */
540 eq_demangled_name_entry (const void *a, const void *b)
542 const struct demangled_name_entry *da = a;
543 const struct demangled_name_entry *db = b;
545 return strcmp (da->mangled, db->mangled) == 0;
548 /* Create the hash table used for demangled names. Each hash entry is
549 a pair of strings; one for the mangled name and one for the demangled
550 name. The entry is hashed via just the mangled name. */
553 create_demangled_names_hash (struct objfile *objfile)
555 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
556 The hash table code will round this up to the next prime number.
557 Choosing a much larger table size wastes memory, and saves only about
558 1% in symbol reading. */
560 objfile->demangled_names_hash = htab_create_alloc
561 (256, hash_demangled_name_entry, eq_demangled_name_entry,
562 NULL, xcalloc, xfree);
565 /* Try to determine the demangled name for a symbol, based on the
566 language of that symbol. If the language is set to language_auto,
567 it will attempt to find any demangling algorithm that works and
568 then set the language appropriately. The returned name is allocated
569 by the demangler and should be xfree'd. */
572 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
575 char *demangled = NULL;
577 if (gsymbol->language == language_unknown)
578 gsymbol->language = language_auto;
580 if (gsymbol->language == language_objc
581 || gsymbol->language == language_auto)
584 objc_demangle (mangled, 0);
585 if (demangled != NULL)
587 gsymbol->language = language_objc;
591 if (gsymbol->language == language_cplus
592 || gsymbol->language == language_auto)
595 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
596 if (demangled != NULL)
598 gsymbol->language = language_cplus;
602 if (gsymbol->language == language_java)
605 cplus_demangle (mangled,
606 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
607 if (demangled != NULL)
609 gsymbol->language = language_java;
613 if (gsymbol->language == language_d
614 || gsymbol->language == language_auto)
616 demangled = d_demangle(mangled, 0);
617 if (demangled != NULL)
619 gsymbol->language = language_d;
623 /* FIXME(dje): Continually adding languages here is clumsy.
624 Better to just call la_demangle if !auto, and if auto then call
625 a utility routine that tries successive languages in turn and reports
626 which one it finds. I realize the la_demangle options may be different
627 for different languages but there's already a FIXME for that. */
628 if (gsymbol->language == language_go
629 || gsymbol->language == language_auto)
631 demangled = go_demangle (mangled, 0);
632 if (demangled != NULL)
634 gsymbol->language = language_go;
639 /* We could support `gsymbol->language == language_fortran' here to provide
640 module namespaces also for inferiors with only minimal symbol table (ELF
641 symbols). Just the mangling standard is not standardized across compilers
642 and there is no DW_AT_producer available for inferiors with only the ELF
643 symbols to check the mangling kind. */
647 /* Set both the mangled and demangled (if any) names for GSYMBOL based
648 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
649 objfile's obstack; but if COPY_NAME is 0 and if NAME is
650 NUL-terminated, then this function assumes that NAME is already
651 correctly saved (either permanently or with a lifetime tied to the
652 objfile), and it will not be copied.
654 The hash table corresponding to OBJFILE is used, and the memory
655 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
656 so the pointer can be discarded after calling this function. */
658 /* We have to be careful when dealing with Java names: when we run
659 into a Java minimal symbol, we don't know it's a Java symbol, so it
660 gets demangled as a C++ name. This is unfortunate, but there's not
661 much we can do about it: but when demangling partial symbols and
662 regular symbols, we'd better not reuse the wrong demangled name.
663 (See PR gdb/1039.) We solve this by putting a distinctive prefix
664 on Java names when storing them in the hash table. */
666 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
667 don't mind the Java prefix so much: different languages have
668 different demangling requirements, so it's only natural that we
669 need to keep language data around in our demangling cache. But
670 it's not good that the minimal symbol has the wrong demangled name.
671 Unfortunately, I can't think of any easy solution to that
674 #define JAVA_PREFIX "##JAVA$$"
675 #define JAVA_PREFIX_LEN 8
678 symbol_set_names (struct general_symbol_info *gsymbol,
679 const char *linkage_name, int len, int copy_name,
680 struct objfile *objfile)
682 struct demangled_name_entry **slot;
683 /* A 0-terminated copy of the linkage name. */
684 const char *linkage_name_copy;
685 /* A copy of the linkage name that might have a special Java prefix
686 added to it, for use when looking names up in the hash table. */
687 const char *lookup_name;
688 /* The length of lookup_name. */
690 struct demangled_name_entry entry;
692 if (gsymbol->language == language_ada)
694 /* In Ada, we do the symbol lookups using the mangled name, so
695 we can save some space by not storing the demangled name.
697 As a side note, we have also observed some overlap between
698 the C++ mangling and Ada mangling, similarly to what has
699 been observed with Java. Because we don't store the demangled
700 name with the symbol, we don't need to use the same trick
703 gsymbol->name = linkage_name;
706 char *name = obstack_alloc (&objfile->objfile_obstack, len + 1);
708 memcpy (name, linkage_name, len);
710 gsymbol->name = name;
712 symbol_set_demangled_name (gsymbol, NULL, NULL);
717 if (objfile->demangled_names_hash == NULL)
718 create_demangled_names_hash (objfile);
720 /* The stabs reader generally provides names that are not
721 NUL-terminated; most of the other readers don't do this, so we
722 can just use the given copy, unless we're in the Java case. */
723 if (gsymbol->language == language_java)
727 lookup_len = len + JAVA_PREFIX_LEN;
728 alloc_name = alloca (lookup_len + 1);
729 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
730 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
731 alloc_name[lookup_len] = '\0';
733 lookup_name = alloc_name;
734 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
736 else if (linkage_name[len] != '\0')
741 alloc_name = alloca (lookup_len + 1);
742 memcpy (alloc_name, linkage_name, len);
743 alloc_name[lookup_len] = '\0';
745 lookup_name = alloc_name;
746 linkage_name_copy = alloc_name;
751 lookup_name = linkage_name;
752 linkage_name_copy = linkage_name;
755 entry.mangled = (char *) lookup_name;
756 slot = ((struct demangled_name_entry **)
757 htab_find_slot (objfile->demangled_names_hash,
760 /* If this name is not in the hash table, add it. */
762 /* A C version of the symbol may have already snuck into the table.
763 This happens to, e.g., main.init (__go_init_main). Cope. */
764 || (gsymbol->language == language_go
765 && (*slot)->demangled[0] == '\0'))
767 char *demangled_name = symbol_find_demangled_name (gsymbol,
769 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
771 /* Suppose we have demangled_name==NULL, copy_name==0, and
772 lookup_name==linkage_name. In this case, we already have the
773 mangled name saved, and we don't have a demangled name. So,
774 you might think we could save a little space by not recording
775 this in the hash table at all.
777 It turns out that it is actually important to still save such
778 an entry in the hash table, because storing this name gives
779 us better bcache hit rates for partial symbols. */
780 if (!copy_name && lookup_name == linkage_name)
782 *slot = obstack_alloc (&objfile->objfile_obstack,
783 offsetof (struct demangled_name_entry,
785 + demangled_len + 1);
786 (*slot)->mangled = (char *) lookup_name;
790 /* If we must copy the mangled name, put it directly after
791 the demangled name so we can have a single
793 *slot = obstack_alloc (&objfile->objfile_obstack,
794 offsetof (struct demangled_name_entry,
796 + lookup_len + demangled_len + 2);
797 (*slot)->mangled = &((*slot)->demangled[demangled_len + 1]);
798 strcpy ((*slot)->mangled, lookup_name);
801 if (demangled_name != NULL)
803 strcpy ((*slot)->demangled, demangled_name);
804 xfree (demangled_name);
807 (*slot)->demangled[0] = '\0';
810 gsymbol->name = (*slot)->mangled + lookup_len - len;
811 if ((*slot)->demangled[0] != '\0')
812 symbol_set_demangled_name (gsymbol, (*slot)->demangled, objfile);
814 symbol_set_demangled_name (gsymbol, NULL, objfile);
817 /* Return the source code name of a symbol. In languages where
818 demangling is necessary, this is the demangled name. */
821 symbol_natural_name (const struct general_symbol_info *gsymbol)
823 switch (gsymbol->language)
830 case language_fortran:
831 if (symbol_get_demangled_name (gsymbol) != NULL)
832 return symbol_get_demangled_name (gsymbol);
835 if (symbol_get_demangled_name (gsymbol) != NULL)
836 return symbol_get_demangled_name (gsymbol);
838 return ada_decode_symbol (gsymbol);
843 return gsymbol->name;
846 /* Return the demangled name for a symbol based on the language for
847 that symbol. If no demangled name exists, return NULL. */
850 symbol_demangled_name (const struct general_symbol_info *gsymbol)
852 const char *dem_name = NULL;
854 switch (gsymbol->language)
861 case language_fortran:
862 dem_name = symbol_get_demangled_name (gsymbol);
865 dem_name = symbol_get_demangled_name (gsymbol);
866 if (dem_name == NULL)
867 dem_name = ada_decode_symbol (gsymbol);
875 /* Return the search name of a symbol---generally the demangled or
876 linkage name of the symbol, depending on how it will be searched for.
877 If there is no distinct demangled name, then returns the same value
878 (same pointer) as SYMBOL_LINKAGE_NAME. */
881 symbol_search_name (const struct general_symbol_info *gsymbol)
883 if (gsymbol->language == language_ada)
884 return gsymbol->name;
886 return symbol_natural_name (gsymbol);
889 /* Initialize the structure fields to zero values. */
892 init_sal (struct symtab_and_line *sal)
900 sal->explicit_pc = 0;
901 sal->explicit_line = 0;
906 /* Return 1 if the two sections are the same, or if they could
907 plausibly be copies of each other, one in an original object
908 file and another in a separated debug file. */
911 matching_obj_sections (struct obj_section *obj_first,
912 struct obj_section *obj_second)
914 asection *first = obj_first? obj_first->the_bfd_section : NULL;
915 asection *second = obj_second? obj_second->the_bfd_section : NULL;
918 /* If they're the same section, then they match. */
922 /* If either is NULL, give up. */
923 if (first == NULL || second == NULL)
926 /* This doesn't apply to absolute symbols. */
927 if (first->owner == NULL || second->owner == NULL)
930 /* If they're in the same object file, they must be different sections. */
931 if (first->owner == second->owner)
934 /* Check whether the two sections are potentially corresponding. They must
935 have the same size, address, and name. We can't compare section indexes,
936 which would be more reliable, because some sections may have been
938 if (bfd_get_section_size (first) != bfd_get_section_size (second))
941 /* In-memory addresses may start at a different offset, relativize them. */
942 if (bfd_get_section_vma (first->owner, first)
943 - bfd_get_start_address (first->owner)
944 != bfd_get_section_vma (second->owner, second)
945 - bfd_get_start_address (second->owner))
948 if (bfd_get_section_name (first->owner, first) == NULL
949 || bfd_get_section_name (second->owner, second) == NULL
950 || strcmp (bfd_get_section_name (first->owner, first),
951 bfd_get_section_name (second->owner, second)) != 0)
954 /* Otherwise check that they are in corresponding objfiles. */
957 if (obj->obfd == first->owner)
959 gdb_assert (obj != NULL);
961 if (obj->separate_debug_objfile != NULL
962 && obj->separate_debug_objfile->obfd == second->owner)
964 if (obj->separate_debug_objfile_backlink != NULL
965 && obj->separate_debug_objfile_backlink->obfd == second->owner)
972 find_pc_sect_symtab_via_partial (CORE_ADDR pc, struct obj_section *section)
974 struct objfile *objfile;
975 struct minimal_symbol *msymbol;
977 /* If we know that this is not a text address, return failure. This is
978 necessary because we loop based on texthigh and textlow, which do
979 not include the data ranges. */
980 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
982 && (MSYMBOL_TYPE (msymbol) == mst_data
983 || MSYMBOL_TYPE (msymbol) == mst_bss
984 || MSYMBOL_TYPE (msymbol) == mst_abs
985 || MSYMBOL_TYPE (msymbol) == mst_file_data
986 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
989 ALL_OBJFILES (objfile)
991 struct symtab *result = NULL;
994 result = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
1003 /* Debug symbols usually don't have section information. We need to dig that
1004 out of the minimal symbols and stash that in the debug symbol. */
1007 fixup_section (struct general_symbol_info *ginfo,
1008 CORE_ADDR addr, struct objfile *objfile)
1010 struct minimal_symbol *msym;
1012 /* First, check whether a minimal symbol with the same name exists
1013 and points to the same address. The address check is required
1014 e.g. on PowerPC64, where the minimal symbol for a function will
1015 point to the function descriptor, while the debug symbol will
1016 point to the actual function code. */
1017 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1020 ginfo->obj_section = SYMBOL_OBJ_SECTION (msym);
1021 ginfo->section = SYMBOL_SECTION (msym);
1025 /* Static, function-local variables do appear in the linker
1026 (minimal) symbols, but are frequently given names that won't
1027 be found via lookup_minimal_symbol(). E.g., it has been
1028 observed in frv-uclinux (ELF) executables that a static,
1029 function-local variable named "foo" might appear in the
1030 linker symbols as "foo.6" or "foo.3". Thus, there is no
1031 point in attempting to extend the lookup-by-name mechanism to
1032 handle this case due to the fact that there can be multiple
1035 So, instead, search the section table when lookup by name has
1036 failed. The ``addr'' and ``endaddr'' fields may have already
1037 been relocated. If so, the relocation offset (i.e. the
1038 ANOFFSET value) needs to be subtracted from these values when
1039 performing the comparison. We unconditionally subtract it,
1040 because, when no relocation has been performed, the ANOFFSET
1041 value will simply be zero.
1043 The address of the symbol whose section we're fixing up HAS
1044 NOT BEEN adjusted (relocated) yet. It can't have been since
1045 the section isn't yet known and knowing the section is
1046 necessary in order to add the correct relocation value. In
1047 other words, we wouldn't even be in this function (attempting
1048 to compute the section) if it were already known.
1050 Note that it is possible to search the minimal symbols
1051 (subtracting the relocation value if necessary) to find the
1052 matching minimal symbol, but this is overkill and much less
1053 efficient. It is not necessary to find the matching minimal
1054 symbol, only its section.
1056 Note that this technique (of doing a section table search)
1057 can fail when unrelocated section addresses overlap. For
1058 this reason, we still attempt a lookup by name prior to doing
1059 a search of the section table. */
1061 struct obj_section *s;
1063 ALL_OBJFILE_OSECTIONS (objfile, s)
1065 int idx = s->the_bfd_section->index;
1066 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1068 if (obj_section_addr (s) - offset <= addr
1069 && addr < obj_section_endaddr (s) - offset)
1071 ginfo->obj_section = s;
1072 ginfo->section = idx;
1080 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1087 if (SYMBOL_OBJ_SECTION (sym))
1090 /* We either have an OBJFILE, or we can get at it from the sym's
1091 symtab. Anything else is a bug. */
1092 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1094 if (objfile == NULL)
1095 objfile = SYMBOL_SYMTAB (sym)->objfile;
1097 /* We should have an objfile by now. */
1098 gdb_assert (objfile);
1100 switch (SYMBOL_CLASS (sym))
1104 addr = SYMBOL_VALUE_ADDRESS (sym);
1107 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1111 /* Nothing else will be listed in the minsyms -- no use looking
1116 fixup_section (&sym->ginfo, addr, objfile);
1121 /* Compute the demangled form of NAME as used by the various symbol
1122 lookup functions. The result is stored in *RESULT_NAME. Returns a
1123 cleanup which can be used to clean up the result.
1125 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1126 Normally, Ada symbol lookups are performed using the encoded name
1127 rather than the demangled name, and so it might seem to make sense
1128 for this function to return an encoded version of NAME.
1129 Unfortunately, we cannot do this, because this function is used in
1130 circumstances where it is not appropriate to try to encode NAME.
1131 For instance, when displaying the frame info, we demangle the name
1132 of each parameter, and then perform a symbol lookup inside our
1133 function using that demangled name. In Ada, certain functions
1134 have internally-generated parameters whose name contain uppercase
1135 characters. Encoding those name would result in those uppercase
1136 characters to become lowercase, and thus cause the symbol lookup
1140 demangle_for_lookup (const char *name, enum language lang,
1141 const char **result_name)
1143 char *demangled_name = NULL;
1144 const char *modified_name = NULL;
1145 struct cleanup *cleanup = make_cleanup (null_cleanup, 0);
1147 modified_name = name;
1149 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1150 lookup, so we can always binary search. */
1151 if (lang == language_cplus)
1153 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1156 modified_name = demangled_name;
1157 make_cleanup (xfree, demangled_name);
1161 /* If we were given a non-mangled name, canonicalize it
1162 according to the language (so far only for C++). */
1163 demangled_name = cp_canonicalize_string (name);
1166 modified_name = demangled_name;
1167 make_cleanup (xfree, demangled_name);
1171 else if (lang == language_java)
1173 demangled_name = cplus_demangle (name,
1174 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1177 modified_name = demangled_name;
1178 make_cleanup (xfree, demangled_name);
1181 else if (lang == language_d)
1183 demangled_name = d_demangle (name, 0);
1186 modified_name = demangled_name;
1187 make_cleanup (xfree, demangled_name);
1190 else if (lang == language_go)
1192 demangled_name = go_demangle (name, 0);
1195 modified_name = demangled_name;
1196 make_cleanup (xfree, demangled_name);
1200 *result_name = modified_name;
1204 /* Find the definition for a specified symbol name NAME
1205 in domain DOMAIN, visible from lexical block BLOCK.
1206 Returns the struct symbol pointer, or zero if no symbol is found.
1207 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1208 NAME is a field of the current implied argument `this'. If so set
1209 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1210 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1211 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1213 /* This function (or rather its subordinates) have a bunch of loops and
1214 it would seem to be attractive to put in some QUIT's (though I'm not really
1215 sure whether it can run long enough to be really important). But there
1216 are a few calls for which it would appear to be bad news to quit
1217 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1218 that there is C++ code below which can error(), but that probably
1219 doesn't affect these calls since they are looking for a known
1220 variable and thus can probably assume it will never hit the C++
1224 lookup_symbol_in_language (const char *name, const struct block *block,
1225 const domain_enum domain, enum language lang,
1226 int *is_a_field_of_this)
1228 const char *modified_name;
1229 struct symbol *returnval;
1230 struct cleanup *cleanup = demangle_for_lookup (name, lang, &modified_name);
1232 returnval = lookup_symbol_aux (modified_name, block, domain, lang,
1233 is_a_field_of_this);
1234 do_cleanups (cleanup);
1239 /* Behave like lookup_symbol_in_language, but performed with the
1240 current language. */
1243 lookup_symbol (const char *name, const struct block *block,
1244 domain_enum domain, int *is_a_field_of_this)
1246 return lookup_symbol_in_language (name, block, domain,
1247 current_language->la_language,
1248 is_a_field_of_this);
1251 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1252 found, or NULL if not found. */
1255 lookup_language_this (const struct language_defn *lang,
1256 const struct block *block)
1258 if (lang->la_name_of_this == NULL || block == NULL)
1265 sym = lookup_block_symbol (block, lang->la_name_of_this, VAR_DOMAIN);
1268 block_found = block;
1271 if (BLOCK_FUNCTION (block))
1273 block = BLOCK_SUPERBLOCK (block);
1279 /* Behave like lookup_symbol except that NAME is the natural name
1280 (e.g., demangled name) of the symbol that we're looking for. */
1282 static struct symbol *
1283 lookup_symbol_aux (const char *name, const struct block *block,
1284 const domain_enum domain, enum language language,
1285 int *is_a_field_of_this)
1288 const struct language_defn *langdef;
1290 /* Make sure we do something sensible with is_a_field_of_this, since
1291 the callers that set this parameter to some non-null value will
1292 certainly use it later and expect it to be either 0 or 1.
1293 If we don't set it, the contents of is_a_field_of_this are
1295 if (is_a_field_of_this != NULL)
1296 *is_a_field_of_this = 0;
1298 /* Search specified block and its superiors. Don't search
1299 STATIC_BLOCK or GLOBAL_BLOCK. */
1301 sym = lookup_symbol_aux_local (name, block, domain, language);
1305 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1306 check to see if NAME is a field of `this'. */
1308 langdef = language_def (language);
1310 if (is_a_field_of_this != NULL)
1312 struct symbol *sym = lookup_language_this (langdef, block);
1316 struct type *t = sym->type;
1318 /* I'm not really sure that type of this can ever
1319 be typedefed; just be safe. */
1321 if (TYPE_CODE (t) == TYPE_CODE_PTR
1322 || TYPE_CODE (t) == TYPE_CODE_REF)
1323 t = TYPE_TARGET_TYPE (t);
1325 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1326 && TYPE_CODE (t) != TYPE_CODE_UNION)
1327 error (_("Internal error: `%s' is not an aggregate"),
1328 langdef->la_name_of_this);
1330 if (check_field (t, name))
1332 *is_a_field_of_this = 1;
1338 /* Now do whatever is appropriate for LANGUAGE to look
1339 up static and global variables. */
1341 sym = langdef->la_lookup_symbol_nonlocal (name, block, domain);
1345 /* Now search all static file-level symbols. Not strictly correct,
1346 but more useful than an error. */
1348 return lookup_static_symbol_aux (name, domain);
1351 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1352 first, then check the psymtabs. If a psymtab indicates the existence of the
1353 desired name as a file-level static, then do psymtab-to-symtab conversion on
1354 the fly and return the found symbol. */
1357 lookup_static_symbol_aux (const char *name, const domain_enum domain)
1359 struct objfile *objfile;
1362 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, domain);
1366 ALL_OBJFILES (objfile)
1368 sym = lookup_symbol_aux_quick (objfile, STATIC_BLOCK, name, domain);
1376 /* Check to see if the symbol is defined in BLOCK or its superiors.
1377 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1379 static struct symbol *
1380 lookup_symbol_aux_local (const char *name, const struct block *block,
1381 const domain_enum domain,
1382 enum language language)
1385 const struct block *static_block = block_static_block (block);
1386 const char *scope = block_scope (block);
1388 /* Check if either no block is specified or it's a global block. */
1390 if (static_block == NULL)
1393 while (block != static_block)
1395 sym = lookup_symbol_aux_block (name, block, domain);
1399 if (language == language_cplus || language == language_fortran)
1401 sym = cp_lookup_symbol_imports_or_template (scope, name, block,
1407 if (BLOCK_FUNCTION (block) != NULL && block_inlined_p (block))
1409 block = BLOCK_SUPERBLOCK (block);
1412 /* We've reached the edge of the function without finding a result. */
1417 /* Look up OBJFILE to BLOCK. */
1420 lookup_objfile_from_block (const struct block *block)
1422 struct objfile *obj;
1428 block = block_global_block (block);
1429 /* Go through SYMTABS. */
1430 ALL_SYMTABS (obj, s)
1431 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1433 if (obj->separate_debug_objfile_backlink)
1434 obj = obj->separate_debug_objfile_backlink;
1442 /* Look up a symbol in a block; if found, fixup the symbol, and set
1443 block_found appropriately. */
1446 lookup_symbol_aux_block (const char *name, const struct block *block,
1447 const domain_enum domain)
1451 sym = lookup_block_symbol (block, name, domain);
1454 block_found = block;
1455 return fixup_symbol_section (sym, NULL);
1461 /* Check all global symbols in OBJFILE in symtabs and
1465 lookup_global_symbol_from_objfile (const struct objfile *main_objfile,
1467 const domain_enum domain)
1469 const struct objfile *objfile;
1471 struct blockvector *bv;
1472 const struct block *block;
1475 for (objfile = main_objfile;
1477 objfile = objfile_separate_debug_iterate (main_objfile, objfile))
1479 /* Go through symtabs. */
1480 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1482 bv = BLOCKVECTOR (s);
1483 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1484 sym = lookup_block_symbol (block, name, domain);
1487 block_found = block;
1488 return fixup_symbol_section (sym, (struct objfile *)objfile);
1492 sym = lookup_symbol_aux_quick ((struct objfile *) objfile, GLOBAL_BLOCK,
1501 /* Check to see if the symbol is defined in one of the OBJFILE's
1502 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1503 depending on whether or not we want to search global symbols or
1506 static struct symbol *
1507 lookup_symbol_aux_objfile (struct objfile *objfile, int block_index,
1508 const char *name, const domain_enum domain)
1510 struct symbol *sym = NULL;
1511 struct blockvector *bv;
1512 const struct block *block;
1516 objfile->sf->qf->pre_expand_symtabs_matching (objfile, block_index,
1519 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1521 bv = BLOCKVECTOR (s);
1522 block = BLOCKVECTOR_BLOCK (bv, block_index);
1523 sym = lookup_block_symbol (block, name, domain);
1526 block_found = block;
1527 return fixup_symbol_section (sym, objfile);
1534 /* Same as lookup_symbol_aux_objfile, except that it searches all
1535 objfiles. Return the first match found. */
1537 static struct symbol *
1538 lookup_symbol_aux_symtabs (int block_index, const char *name,
1539 const domain_enum domain)
1542 struct objfile *objfile;
1544 ALL_OBJFILES (objfile)
1546 sym = lookup_symbol_aux_objfile (objfile, block_index, name, domain);
1554 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1555 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1556 and all related objfiles. */
1558 static struct symbol *
1559 lookup_symbol_in_objfile_from_linkage_name (struct objfile *objfile,
1560 const char *linkage_name,
1563 enum language lang = current_language->la_language;
1564 const char *modified_name;
1565 struct cleanup *cleanup = demangle_for_lookup (linkage_name, lang,
1567 struct objfile *main_objfile, *cur_objfile;
1569 if (objfile->separate_debug_objfile_backlink)
1570 main_objfile = objfile->separate_debug_objfile_backlink;
1572 main_objfile = objfile;
1574 for (cur_objfile = main_objfile;
1576 cur_objfile = objfile_separate_debug_iterate (main_objfile, cur_objfile))
1580 sym = lookup_symbol_aux_objfile (cur_objfile, GLOBAL_BLOCK,
1581 modified_name, domain);
1583 sym = lookup_symbol_aux_objfile (cur_objfile, STATIC_BLOCK,
1584 modified_name, domain);
1587 do_cleanups (cleanup);
1592 do_cleanups (cleanup);
1596 /* A helper function for lookup_symbol_aux that interfaces with the
1597 "quick" symbol table functions. */
1599 static struct symbol *
1600 lookup_symbol_aux_quick (struct objfile *objfile, int kind,
1601 const char *name, const domain_enum domain)
1603 struct symtab *symtab;
1604 struct blockvector *bv;
1605 const struct block *block;
1610 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, domain);
1614 bv = BLOCKVECTOR (symtab);
1615 block = BLOCKVECTOR_BLOCK (bv, kind);
1616 sym = lookup_block_symbol (block, name, domain);
1619 /* This shouldn't be necessary, but as a last resort try
1620 looking in the statics even though the psymtab claimed
1621 the symbol was global, or vice-versa. It's possible
1622 that the psymtab gets it wrong in some cases. */
1624 /* FIXME: carlton/2002-09-30: Should we really do that?
1625 If that happens, isn't it likely to be a GDB error, in
1626 which case we should fix the GDB error rather than
1627 silently dealing with it here? So I'd vote for
1628 removing the check for the symbol in the other
1630 block = BLOCKVECTOR_BLOCK (bv,
1631 kind == GLOBAL_BLOCK ?
1632 STATIC_BLOCK : GLOBAL_BLOCK);
1633 sym = lookup_block_symbol (block, name, domain);
1636 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1637 %s may be an inlined function, or may be a template function\n\
1638 (if a template, try specifying an instantiation: %s<type>)."),
1639 kind == GLOBAL_BLOCK ? "global" : "static",
1640 name, symtab->filename, name, name);
1642 return fixup_symbol_section (sym, objfile);
1645 /* A default version of lookup_symbol_nonlocal for use by languages
1646 that can't think of anything better to do. This implements the C
1650 basic_lookup_symbol_nonlocal (const char *name,
1651 const struct block *block,
1652 const domain_enum domain)
1656 /* NOTE: carlton/2003-05-19: The comments below were written when
1657 this (or what turned into this) was part of lookup_symbol_aux;
1658 I'm much less worried about these questions now, since these
1659 decisions have turned out well, but I leave these comments here
1662 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1663 not it would be appropriate to search the current global block
1664 here as well. (That's what this code used to do before the
1665 is_a_field_of_this check was moved up.) On the one hand, it's
1666 redundant with the lookup_symbol_aux_symtabs search that happens
1667 next. On the other hand, if decode_line_1 is passed an argument
1668 like filename:var, then the user presumably wants 'var' to be
1669 searched for in filename. On the third hand, there shouldn't be
1670 multiple global variables all of which are named 'var', and it's
1671 not like decode_line_1 has ever restricted its search to only
1672 global variables in a single filename. All in all, only
1673 searching the static block here seems best: it's correct and it's
1676 /* NOTE: carlton/2002-12-05: There's also a possible performance
1677 issue here: if you usually search for global symbols in the
1678 current file, then it would be slightly better to search the
1679 current global block before searching all the symtabs. But there
1680 are other factors that have a much greater effect on performance
1681 than that one, so I don't think we should worry about that for
1684 sym = lookup_symbol_static (name, block, domain);
1688 return lookup_symbol_global (name, block, domain);
1691 /* Lookup a symbol in the static block associated to BLOCK, if there
1692 is one; do nothing if BLOCK is NULL or a global block. */
1695 lookup_symbol_static (const char *name,
1696 const struct block *block,
1697 const domain_enum domain)
1699 const struct block *static_block = block_static_block (block);
1701 if (static_block != NULL)
1702 return lookup_symbol_aux_block (name, static_block, domain);
1707 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1709 struct global_sym_lookup_data
1711 /* The name of the symbol we are searching for. */
1714 /* The domain to use for our search. */
1717 /* The field where the callback should store the symbol if found.
1718 It should be initialized to NULL before the search is started. */
1719 struct symbol *result;
1722 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1723 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1724 OBJFILE. The arguments for the search are passed via CB_DATA,
1725 which in reality is a pointer to struct global_sym_lookup_data. */
1728 lookup_symbol_global_iterator_cb (struct objfile *objfile,
1731 struct global_sym_lookup_data *data =
1732 (struct global_sym_lookup_data *) cb_data;
1734 gdb_assert (data->result == NULL);
1736 data->result = lookup_symbol_aux_objfile (objfile, GLOBAL_BLOCK,
1737 data->name, data->domain);
1738 if (data->result == NULL)
1739 data->result = lookup_symbol_aux_quick (objfile, GLOBAL_BLOCK,
1740 data->name, data->domain);
1742 /* If we found a match, tell the iterator to stop. Otherwise,
1744 return (data->result != NULL);
1747 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1751 lookup_symbol_global (const char *name,
1752 const struct block *block,
1753 const domain_enum domain)
1755 struct symbol *sym = NULL;
1756 struct objfile *objfile = NULL;
1757 struct global_sym_lookup_data lookup_data;
1759 /* Call library-specific lookup procedure. */
1760 objfile = lookup_objfile_from_block (block);
1761 if (objfile != NULL)
1762 sym = solib_global_lookup (objfile, name, domain);
1766 memset (&lookup_data, 0, sizeof (lookup_data));
1767 lookup_data.name = name;
1768 lookup_data.domain = domain;
1769 gdbarch_iterate_over_objfiles_in_search_order
1770 (objfile != NULL ? get_objfile_arch (objfile) : target_gdbarch,
1771 lookup_symbol_global_iterator_cb, &lookup_data, objfile);
1773 return lookup_data.result;
1777 symbol_matches_domain (enum language symbol_language,
1778 domain_enum symbol_domain,
1781 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1782 A Java class declaration also defines a typedef for the class.
1783 Similarly, any Ada type declaration implicitly defines a typedef. */
1784 if (symbol_language == language_cplus
1785 || symbol_language == language_d
1786 || symbol_language == language_java
1787 || symbol_language == language_ada)
1789 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1790 && symbol_domain == STRUCT_DOMAIN)
1793 /* For all other languages, strict match is required. */
1794 return (symbol_domain == domain);
1797 /* Look up a type named NAME in the struct_domain. The type returned
1798 must not be opaque -- i.e., must have at least one field
1802 lookup_transparent_type (const char *name)
1804 return current_language->la_lookup_transparent_type (name);
1807 /* A helper for basic_lookup_transparent_type that interfaces with the
1808 "quick" symbol table functions. */
1810 static struct type *
1811 basic_lookup_transparent_type_quick (struct objfile *objfile, int kind,
1814 struct symtab *symtab;
1815 struct blockvector *bv;
1816 struct block *block;
1821 symtab = objfile->sf->qf->lookup_symbol (objfile, kind, name, STRUCT_DOMAIN);
1825 bv = BLOCKVECTOR (symtab);
1826 block = BLOCKVECTOR_BLOCK (bv, kind);
1827 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1830 int other_kind = kind == GLOBAL_BLOCK ? STATIC_BLOCK : GLOBAL_BLOCK;
1832 /* This shouldn't be necessary, but as a last resort
1833 * try looking in the 'other kind' even though the psymtab
1834 * claimed the symbol was one thing. It's possible that
1835 * the psymtab gets it wrong in some cases.
1837 block = BLOCKVECTOR_BLOCK (bv, other_kind);
1838 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1840 /* FIXME; error is wrong in one case. */
1842 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1843 %s may be an inlined function, or may be a template function\n\
1844 (if a template, try specifying an instantiation: %s<type>)."),
1845 name, symtab->filename, name, name);
1847 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1848 return SYMBOL_TYPE (sym);
1853 /* The standard implementation of lookup_transparent_type. This code
1854 was modeled on lookup_symbol -- the parts not relevant to looking
1855 up types were just left out. In particular it's assumed here that
1856 types are available in struct_domain and only at file-static or
1860 basic_lookup_transparent_type (const char *name)
1863 struct symtab *s = NULL;
1864 struct blockvector *bv;
1865 struct objfile *objfile;
1866 struct block *block;
1869 /* Now search all the global symbols. Do the symtab's first, then
1870 check the psymtab's. If a psymtab indicates the existence
1871 of the desired name as a global, then do psymtab-to-symtab
1872 conversion on the fly and return the found symbol. */
1874 ALL_OBJFILES (objfile)
1877 objfile->sf->qf->pre_expand_symtabs_matching (objfile,
1879 name, STRUCT_DOMAIN);
1881 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1883 bv = BLOCKVECTOR (s);
1884 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1885 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1886 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1888 return SYMBOL_TYPE (sym);
1893 ALL_OBJFILES (objfile)
1895 t = basic_lookup_transparent_type_quick (objfile, GLOBAL_BLOCK, name);
1900 /* Now search the static file-level symbols.
1901 Not strictly correct, but more useful than an error.
1902 Do the symtab's first, then
1903 check the psymtab's. If a psymtab indicates the existence
1904 of the desired name as a file-level static, then do psymtab-to-symtab
1905 conversion on the fly and return the found symbol. */
1907 ALL_OBJFILES (objfile)
1910 objfile->sf->qf->pre_expand_symtabs_matching (objfile, STATIC_BLOCK,
1911 name, STRUCT_DOMAIN);
1913 ALL_OBJFILE_PRIMARY_SYMTABS (objfile, s)
1915 bv = BLOCKVECTOR (s);
1916 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1917 sym = lookup_block_symbol (block, name, STRUCT_DOMAIN);
1918 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1920 return SYMBOL_TYPE (sym);
1925 ALL_OBJFILES (objfile)
1927 t = basic_lookup_transparent_type_quick (objfile, STATIC_BLOCK, name);
1932 return (struct type *) 0;
1935 /* Find the name of the file containing main(). */
1936 /* FIXME: What about languages without main() or specially linked
1937 executables that have no main() ? */
1940 find_main_filename (void)
1942 struct objfile *objfile;
1943 char *name = main_name ();
1945 ALL_OBJFILES (objfile)
1951 result = objfile->sf->qf->find_symbol_file (objfile, name);
1958 /* Search BLOCK for symbol NAME in DOMAIN.
1960 Note that if NAME is the demangled form of a C++ symbol, we will fail
1961 to find a match during the binary search of the non-encoded names, but
1962 for now we don't worry about the slight inefficiency of looking for
1963 a match we'll never find, since it will go pretty quick. Once the
1964 binary search terminates, we drop through and do a straight linear
1965 search on the symbols. Each symbol which is marked as being a ObjC/C++
1966 symbol (language_cplus or language_objc set) has both the encoded and
1967 non-encoded names tested for a match. */
1970 lookup_block_symbol (const struct block *block, const char *name,
1971 const domain_enum domain)
1973 struct block_iterator iter;
1976 if (!BLOCK_FUNCTION (block))
1978 for (sym = block_iter_name_first (block, name, &iter);
1980 sym = block_iter_name_next (name, &iter))
1982 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1983 SYMBOL_DOMAIN (sym), domain))
1990 /* Note that parameter symbols do not always show up last in the
1991 list; this loop makes sure to take anything else other than
1992 parameter symbols first; it only uses parameter symbols as a
1993 last resort. Note that this only takes up extra computation
1996 struct symbol *sym_found = NULL;
1998 for (sym = block_iter_name_first (block, name, &iter);
2000 sym = block_iter_name_next (name, &iter))
2002 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2003 SYMBOL_DOMAIN (sym), domain))
2006 if (!SYMBOL_IS_ARGUMENT (sym))
2012 return (sym_found); /* Will be NULL if not found. */
2016 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
2019 For each symbol that matches, CALLBACK is called. The symbol and
2020 DATA are passed to the callback.
2022 If CALLBACK returns zero, the iteration ends. Otherwise, the
2023 search continues. This function iterates upward through blocks.
2024 When the outermost block has been finished, the function
2028 iterate_over_symbols (const struct block *block, const char *name,
2029 const domain_enum domain,
2030 symbol_found_callback_ftype *callback,
2035 struct block_iterator iter;
2038 for (sym = block_iter_name_first (block, name, &iter);
2040 sym = block_iter_name_next (name, &iter))
2042 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
2043 SYMBOL_DOMAIN (sym), domain))
2045 if (!callback (sym, data))
2050 block = BLOCK_SUPERBLOCK (block);
2054 /* Find the symtab associated with PC and SECTION. Look through the
2055 psymtabs and read in another symtab if necessary. */
2058 find_pc_sect_symtab (CORE_ADDR pc, struct obj_section *section)
2061 struct blockvector *bv;
2062 struct symtab *s = NULL;
2063 struct symtab *best_s = NULL;
2064 struct objfile *objfile;
2065 struct program_space *pspace;
2066 CORE_ADDR distance = 0;
2067 struct minimal_symbol *msymbol;
2069 pspace = current_program_space;
2071 /* If we know that this is not a text address, return failure. This is
2072 necessary because we loop based on the block's high and low code
2073 addresses, which do not include the data ranges, and because
2074 we call find_pc_sect_psymtab which has a similar restriction based
2075 on the partial_symtab's texthigh and textlow. */
2076 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
2078 && (MSYMBOL_TYPE (msymbol) == mst_data
2079 || MSYMBOL_TYPE (msymbol) == mst_bss
2080 || MSYMBOL_TYPE (msymbol) == mst_abs
2081 || MSYMBOL_TYPE (msymbol) == mst_file_data
2082 || MSYMBOL_TYPE (msymbol) == mst_file_bss))
2085 /* Search all symtabs for the one whose file contains our address, and which
2086 is the smallest of all the ones containing the address. This is designed
2087 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2088 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2089 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2091 This happens for native ecoff format, where code from included files
2092 gets its own symtab. The symtab for the included file should have
2093 been read in already via the dependency mechanism.
2094 It might be swifter to create several symtabs with the same name
2095 like xcoff does (I'm not sure).
2097 It also happens for objfiles that have their functions reordered.
2098 For these, the symtab we are looking for is not necessarily read in. */
2100 ALL_PRIMARY_SYMTABS (objfile, s)
2102 bv = BLOCKVECTOR (s);
2103 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2105 if (BLOCK_START (b) <= pc
2106 && BLOCK_END (b) > pc
2108 || BLOCK_END (b) - BLOCK_START (b) < distance))
2110 /* For an objfile that has its functions reordered,
2111 find_pc_psymtab will find the proper partial symbol table
2112 and we simply return its corresponding symtab. */
2113 /* In order to better support objfiles that contain both
2114 stabs and coff debugging info, we continue on if a psymtab
2116 if ((objfile->flags & OBJF_REORDERED) && objfile->sf)
2118 struct symtab *result;
2121 = objfile->sf->qf->find_pc_sect_symtab (objfile,
2130 struct block_iterator iter;
2131 struct symbol *sym = NULL;
2133 ALL_BLOCK_SYMBOLS (b, iter, sym)
2135 fixup_symbol_section (sym, objfile);
2136 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym), section))
2140 continue; /* No symbol in this symtab matches
2143 distance = BLOCK_END (b) - BLOCK_START (b);
2151 ALL_OBJFILES (objfile)
2153 struct symtab *result;
2157 result = objfile->sf->qf->find_pc_sect_symtab (objfile,
2168 /* Find the symtab associated with PC. Look through the psymtabs and read
2169 in another symtab if necessary. Backward compatibility, no section. */
2172 find_pc_symtab (CORE_ADDR pc)
2174 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2178 /* Find the source file and line number for a given PC value and SECTION.
2179 Return a structure containing a symtab pointer, a line number,
2180 and a pc range for the entire source line.
2181 The value's .pc field is NOT the specified pc.
2182 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2183 use the line that ends there. Otherwise, in that case, the line
2184 that begins there is used. */
2186 /* The big complication here is that a line may start in one file, and end just
2187 before the start of another file. This usually occurs when you #include
2188 code in the middle of a subroutine. To properly find the end of a line's PC
2189 range, we must search all symtabs associated with this compilation unit, and
2190 find the one whose first PC is closer than that of the next line in this
2193 /* If it's worth the effort, we could be using a binary search. */
2195 struct symtab_and_line
2196 find_pc_sect_line (CORE_ADDR pc, struct obj_section *section, int notcurrent)
2199 struct linetable *l;
2202 struct linetable_entry *item;
2203 struct symtab_and_line val;
2204 struct blockvector *bv;
2205 struct minimal_symbol *msymbol;
2206 struct minimal_symbol *mfunsym;
2207 struct objfile *objfile;
2209 /* Info on best line seen so far, and where it starts, and its file. */
2211 struct linetable_entry *best = NULL;
2212 CORE_ADDR best_end = 0;
2213 struct symtab *best_symtab = 0;
2215 /* Store here the first line number
2216 of a file which contains the line at the smallest pc after PC.
2217 If we don't find a line whose range contains PC,
2218 we will use a line one less than this,
2219 with a range from the start of that file to the first line's pc. */
2220 struct linetable_entry *alt = NULL;
2221 struct symtab *alt_symtab = 0;
2223 /* Info on best line seen in this file. */
2225 struct linetable_entry *prev;
2227 /* If this pc is not from the current frame,
2228 it is the address of the end of a call instruction.
2229 Quite likely that is the start of the following statement.
2230 But what we want is the statement containing the instruction.
2231 Fudge the pc to make sure we get that. */
2233 init_sal (&val); /* initialize to zeroes */
2235 val.pspace = current_program_space;
2237 /* It's tempting to assume that, if we can't find debugging info for
2238 any function enclosing PC, that we shouldn't search for line
2239 number info, either. However, GAS can emit line number info for
2240 assembly files --- very helpful when debugging hand-written
2241 assembly code. In such a case, we'd have no debug info for the
2242 function, but we would have line info. */
2247 /* elz: added this because this function returned the wrong
2248 information if the pc belongs to a stub (import/export)
2249 to call a shlib function. This stub would be anywhere between
2250 two functions in the target, and the line info was erroneously
2251 taken to be the one of the line before the pc. */
2253 /* RT: Further explanation:
2255 * We have stubs (trampolines) inserted between procedures.
2257 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2258 * exists in the main image.
2260 * In the minimal symbol table, we have a bunch of symbols
2261 * sorted by start address. The stubs are marked as "trampoline",
2262 * the others appear as text. E.g.:
2264 * Minimal symbol table for main image
2265 * main: code for main (text symbol)
2266 * shr1: stub (trampoline symbol)
2267 * foo: code for foo (text symbol)
2269 * Minimal symbol table for "shr1" image:
2271 * shr1: code for shr1 (text symbol)
2274 * So the code below is trying to detect if we are in the stub
2275 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2276 * and if found, do the symbolization from the real-code address
2277 * rather than the stub address.
2279 * Assumptions being made about the minimal symbol table:
2280 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2281 * if we're really in the trampoline.s If we're beyond it (say
2282 * we're in "foo" in the above example), it'll have a closer
2283 * symbol (the "foo" text symbol for example) and will not
2284 * return the trampoline.
2285 * 2. lookup_minimal_symbol_text() will find a real text symbol
2286 * corresponding to the trampoline, and whose address will
2287 * be different than the trampoline address. I put in a sanity
2288 * check for the address being the same, to avoid an
2289 * infinite recursion.
2291 msymbol = lookup_minimal_symbol_by_pc (pc);
2292 if (msymbol != NULL)
2293 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2295 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2297 if (mfunsym == NULL)
2298 /* I eliminated this warning since it is coming out
2299 * in the following situation:
2300 * gdb shmain // test program with shared libraries
2301 * (gdb) break shr1 // function in shared lib
2302 * Warning: In stub for ...
2303 * In the above situation, the shared lib is not loaded yet,
2304 * so of course we can't find the real func/line info,
2305 * but the "break" still works, and the warning is annoying.
2306 * So I commented out the warning. RT */
2307 /* warning ("In stub for %s; unable to find real function/line info",
2308 SYMBOL_LINKAGE_NAME (msymbol)); */
2311 else if (SYMBOL_VALUE_ADDRESS (mfunsym)
2312 == SYMBOL_VALUE_ADDRESS (msymbol))
2313 /* Avoid infinite recursion */
2314 /* See above comment about why warning is commented out. */
2315 /* warning ("In stub for %s; unable to find real function/line info",
2316 SYMBOL_LINKAGE_NAME (msymbol)); */
2320 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2324 s = find_pc_sect_symtab (pc, section);
2327 /* If no symbol information, return previous pc. */
2334 bv = BLOCKVECTOR (s);
2335 objfile = s->objfile;
2337 /* Look at all the symtabs that share this blockvector.
2338 They all have the same apriori range, that we found was right;
2339 but they have different line tables. */
2341 ALL_OBJFILE_SYMTABS (objfile, s)
2343 if (BLOCKVECTOR (s) != bv)
2346 /* Find the best line in this symtab. */
2353 /* I think len can be zero if the symtab lacks line numbers
2354 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2355 I'm not sure which, and maybe it depends on the symbol
2361 item = l->item; /* Get first line info. */
2363 /* Is this file's first line closer than the first lines of other files?
2364 If so, record this file, and its first line, as best alternate. */
2365 if (item->pc > pc && (!alt || item->pc < alt->pc))
2371 for (i = 0; i < len; i++, item++)
2373 /* Leave prev pointing to the linetable entry for the last line
2374 that started at or before PC. */
2381 /* At this point, prev points at the line whose start addr is <= pc, and
2382 item points at the next line. If we ran off the end of the linetable
2383 (pc >= start of the last line), then prev == item. If pc < start of
2384 the first line, prev will not be set. */
2386 /* Is this file's best line closer than the best in the other files?
2387 If so, record this file, and its best line, as best so far. Don't
2388 save prev if it represents the end of a function (i.e. line number
2389 0) instead of a real line. */
2391 if (prev && prev->line && (!best || prev->pc > best->pc))
2396 /* Discard BEST_END if it's before the PC of the current BEST. */
2397 if (best_end <= best->pc)
2401 /* If another line (denoted by ITEM) is in the linetable and its
2402 PC is after BEST's PC, but before the current BEST_END, then
2403 use ITEM's PC as the new best_end. */
2404 if (best && i < len && item->pc > best->pc
2405 && (best_end == 0 || best_end > item->pc))
2406 best_end = item->pc;
2411 /* If we didn't find any line number info, just return zeros.
2412 We used to return alt->line - 1 here, but that could be
2413 anywhere; if we don't have line number info for this PC,
2414 don't make some up. */
2417 else if (best->line == 0)
2419 /* If our best fit is in a range of PC's for which no line
2420 number info is available (line number is zero) then we didn't
2421 find any valid line information. */
2426 val.symtab = best_symtab;
2427 val.line = best->line;
2429 if (best_end && (!alt || best_end < alt->pc))
2434 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2436 val.section = section;
2440 /* Backward compatibility (no section). */
2442 struct symtab_and_line
2443 find_pc_line (CORE_ADDR pc, int notcurrent)
2445 struct obj_section *section;
2447 section = find_pc_overlay (pc);
2448 if (pc_in_unmapped_range (pc, section))
2449 pc = overlay_mapped_address (pc, section);
2450 return find_pc_sect_line (pc, section, notcurrent);
2453 /* Find line number LINE in any symtab whose name is the same as
2456 If found, return the symtab that contains the linetable in which it was
2457 found, set *INDEX to the index in the linetable of the best entry
2458 found, and set *EXACT_MATCH nonzero if the value returned is an
2461 If not found, return NULL. */
2464 find_line_symtab (struct symtab *symtab, int line,
2465 int *index, int *exact_match)
2467 int exact = 0; /* Initialized here to avoid a compiler warning. */
2469 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2473 struct linetable *best_linetable;
2474 struct symtab *best_symtab;
2476 /* First try looking it up in the given symtab. */
2477 best_linetable = LINETABLE (symtab);
2478 best_symtab = symtab;
2479 best_index = find_line_common (best_linetable, line, &exact, 0);
2480 if (best_index < 0 || !exact)
2482 /* Didn't find an exact match. So we better keep looking for
2483 another symtab with the same name. In the case of xcoff,
2484 multiple csects for one source file (produced by IBM's FORTRAN
2485 compiler) produce multiple symtabs (this is unavoidable
2486 assuming csects can be at arbitrary places in memory and that
2487 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2489 /* BEST is the smallest linenumber > LINE so far seen,
2490 or 0 if none has been seen so far.
2491 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2494 struct objfile *objfile;
2497 if (best_index >= 0)
2498 best = best_linetable->item[best_index].line;
2502 ALL_OBJFILES (objfile)
2505 objfile->sf->qf->expand_symtabs_with_filename (objfile,
2509 /* Get symbol full file name if possible. */
2510 symtab_to_fullname (symtab);
2512 ALL_SYMTABS (objfile, s)
2514 struct linetable *l;
2517 if (FILENAME_CMP (symtab->filename, s->filename) != 0)
2519 if (symtab->fullname != NULL
2520 && symtab_to_fullname (s) != NULL
2521 && FILENAME_CMP (symtab->fullname, s->fullname) != 0)
2524 ind = find_line_common (l, line, &exact, 0);
2534 if (best == 0 || l->item[ind].line < best)
2536 best = l->item[ind].line;
2549 *index = best_index;
2551 *exact_match = exact;
2556 /* Given SYMTAB, returns all the PCs function in the symtab that
2557 exactly match LINE. Returns NULL if there are no exact matches,
2558 but updates BEST_ITEM in this case. */
2561 find_pcs_for_symtab_line (struct symtab *symtab, int line,
2562 struct linetable_entry **best_item)
2565 struct symbol *previous_function = NULL;
2566 VEC (CORE_ADDR) *result = NULL;
2568 /* First, collect all the PCs that are at this line. */
2574 idx = find_line_common (LINETABLE (symtab), line, &was_exact, start);
2580 struct linetable_entry *item = &LINETABLE (symtab)->item[idx];
2582 if (*best_item == NULL || item->line < (*best_item)->line)
2588 VEC_safe_push (CORE_ADDR, result, LINETABLE (symtab)->item[idx].pc);
2596 /* Set the PC value for a given source file and line number and return true.
2597 Returns zero for invalid line number (and sets the PC to 0).
2598 The source file is specified with a struct symtab. */
2601 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2603 struct linetable *l;
2610 symtab = find_line_symtab (symtab, line, &ind, NULL);
2613 l = LINETABLE (symtab);
2614 *pc = l->item[ind].pc;
2621 /* Find the range of pc values in a line.
2622 Store the starting pc of the line into *STARTPTR
2623 and the ending pc (start of next line) into *ENDPTR.
2624 Returns 1 to indicate success.
2625 Returns 0 if could not find the specified line. */
2628 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2631 CORE_ADDR startaddr;
2632 struct symtab_and_line found_sal;
2635 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2638 /* This whole function is based on address. For example, if line 10 has
2639 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2640 "info line *0x123" should say the line goes from 0x100 to 0x200
2641 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2642 This also insures that we never give a range like "starts at 0x134
2643 and ends at 0x12c". */
2645 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2646 if (found_sal.line != sal.line)
2648 /* The specified line (sal) has zero bytes. */
2649 *startptr = found_sal.pc;
2650 *endptr = found_sal.pc;
2654 *startptr = found_sal.pc;
2655 *endptr = found_sal.end;
2660 /* Given a line table and a line number, return the index into the line
2661 table for the pc of the nearest line whose number is >= the specified one.
2662 Return -1 if none is found. The value is >= 0 if it is an index.
2663 START is the index at which to start searching the line table.
2665 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2668 find_line_common (struct linetable *l, int lineno,
2669 int *exact_match, int start)
2674 /* BEST is the smallest linenumber > LINENO so far seen,
2675 or 0 if none has been seen so far.
2676 BEST_INDEX identifies the item for it. */
2678 int best_index = -1;
2689 for (i = start; i < len; i++)
2691 struct linetable_entry *item = &(l->item[i]);
2693 if (item->line == lineno)
2695 /* Return the first (lowest address) entry which matches. */
2700 if (item->line > lineno && (best == 0 || item->line < best))
2707 /* If we got here, we didn't get an exact match. */
2712 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2714 struct symtab_and_line sal;
2716 sal = find_pc_line (pc, 0);
2719 return sal.symtab != 0;
2722 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2723 address for that function that has an entry in SYMTAB's line info
2724 table. If such an entry cannot be found, return FUNC_ADDR
2728 skip_prologue_using_lineinfo (CORE_ADDR func_addr, struct symtab *symtab)
2730 CORE_ADDR func_start, func_end;
2731 struct linetable *l;
2734 /* Give up if this symbol has no lineinfo table. */
2735 l = LINETABLE (symtab);
2739 /* Get the range for the function's PC values, or give up if we
2740 cannot, for some reason. */
2741 if (!find_pc_partial_function (func_addr, NULL, &func_start, &func_end))
2744 /* Linetable entries are ordered by PC values, see the commentary in
2745 symtab.h where `struct linetable' is defined. Thus, the first
2746 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2747 address we are looking for. */
2748 for (i = 0; i < l->nitems; i++)
2750 struct linetable_entry *item = &(l->item[i]);
2752 /* Don't use line numbers of zero, they mark special entries in
2753 the table. See the commentary on symtab.h before the
2754 definition of struct linetable. */
2755 if (item->line > 0 && func_start <= item->pc && item->pc < func_end)
2762 /* Given a function symbol SYM, find the symtab and line for the start
2764 If the argument FUNFIRSTLINE is nonzero, we want the first line
2765 of real code inside the function. */
2767 struct symtab_and_line
2768 find_function_start_sal (struct symbol *sym, int funfirstline)
2770 struct symtab_and_line sal;
2772 fixup_symbol_section (sym, NULL);
2773 sal = find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
2774 SYMBOL_OBJ_SECTION (sym), 0);
2776 /* We always should have a line for the function start address.
2777 If we don't, something is odd. Create a plain SAL refering
2778 just the PC and hope that skip_prologue_sal (if requested)
2779 can find a line number for after the prologue. */
2780 if (sal.pc < BLOCK_START (SYMBOL_BLOCK_VALUE (sym)))
2783 sal.pspace = current_program_space;
2784 sal.pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2785 sal.section = SYMBOL_OBJ_SECTION (sym);
2789 skip_prologue_sal (&sal);
2794 /* Adjust SAL to the first instruction past the function prologue.
2795 If the PC was explicitly specified, the SAL is not changed.
2796 If the line number was explicitly specified, at most the SAL's PC
2797 is updated. If SAL is already past the prologue, then do nothing. */
2800 skip_prologue_sal (struct symtab_and_line *sal)
2803 struct symtab_and_line start_sal;
2804 struct cleanup *old_chain;
2805 CORE_ADDR pc, saved_pc;
2806 struct obj_section *section;
2808 struct objfile *objfile;
2809 struct gdbarch *gdbarch;
2810 struct block *b, *function_block;
2811 int force_skip, skip;
2813 /* Do not change the SAL if PC was specified explicitly. */
2814 if (sal->explicit_pc)
2817 old_chain = save_current_space_and_thread ();
2818 switch_to_program_space_and_thread (sal->pspace);
2820 sym = find_pc_sect_function (sal->pc, sal->section);
2823 fixup_symbol_section (sym, NULL);
2825 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2826 section = SYMBOL_OBJ_SECTION (sym);
2827 name = SYMBOL_LINKAGE_NAME (sym);
2828 objfile = SYMBOL_SYMTAB (sym)->objfile;
2832 struct minimal_symbol *msymbol
2833 = lookup_minimal_symbol_by_pc_section (sal->pc, sal->section);
2835 if (msymbol == NULL)
2837 do_cleanups (old_chain);
2841 pc = SYMBOL_VALUE_ADDRESS (msymbol);
2842 section = SYMBOL_OBJ_SECTION (msymbol);
2843 name = SYMBOL_LINKAGE_NAME (msymbol);
2844 objfile = msymbol_objfile (msymbol);
2847 gdbarch = get_objfile_arch (objfile);
2849 /* Process the prologue in two passes. In the first pass try to skip the
2850 prologue (SKIP is true) and verify there is a real need for it (indicated
2851 by FORCE_SKIP). If no such reason was found run a second pass where the
2852 prologue is not skipped (SKIP is false). */
2857 /* Be conservative - allow direct PC (without skipping prologue) only if we
2858 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2859 have to be set by the caller so we use SYM instead. */
2860 if (sym && SYMBOL_SYMTAB (sym)->locations_valid)
2868 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2869 so that gdbarch_skip_prologue has something unique to work on. */
2870 if (section_is_overlay (section) && !section_is_mapped (section))
2871 pc = overlay_unmapped_address (pc, section);
2873 /* Skip "first line" of function (which is actually its prologue). */
2874 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2876 pc = gdbarch_skip_prologue (gdbarch, pc);
2878 /* For overlays, map pc back into its mapped VMA range. */
2879 pc = overlay_mapped_address (pc, section);
2881 /* Calculate line number. */
2882 start_sal = find_pc_sect_line (pc, section, 0);
2884 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2885 line is still part of the same function. */
2886 if (skip && start_sal.pc != pc
2887 && (sym ? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= start_sal.end
2888 && start_sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2889 : (lookup_minimal_symbol_by_pc_section (start_sal.end, section)
2890 == lookup_minimal_symbol_by_pc_section (pc, section))))
2892 /* First pc of next line */
2894 /* Recalculate the line number (might not be N+1). */
2895 start_sal = find_pc_sect_line (pc, section, 0);
2898 /* On targets with executable formats that don't have a concept of
2899 constructors (ELF with .init has, PE doesn't), gcc emits a call
2900 to `__main' in `main' between the prologue and before user
2902 if (gdbarch_skip_main_prologue_p (gdbarch)
2903 && name && strcmp_iw (name, "main") == 0)
2905 pc = gdbarch_skip_main_prologue (gdbarch, pc);
2906 /* Recalculate the line number (might not be N+1). */
2907 start_sal = find_pc_sect_line (pc, section, 0);
2911 while (!force_skip && skip--);
2913 /* If we still don't have a valid source line, try to find the first
2914 PC in the lineinfo table that belongs to the same function. This
2915 happens with COFF debug info, which does not seem to have an
2916 entry in lineinfo table for the code after the prologue which has
2917 no direct relation to source. For example, this was found to be
2918 the case with the DJGPP target using "gcc -gcoff" when the
2919 compiler inserted code after the prologue to make sure the stack
2921 if (!force_skip && sym && start_sal.symtab == NULL)
2923 pc = skip_prologue_using_lineinfo (pc, SYMBOL_SYMTAB (sym));
2924 /* Recalculate the line number. */
2925 start_sal = find_pc_sect_line (pc, section, 0);
2928 do_cleanups (old_chain);
2930 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2931 forward SAL to the end of the prologue. */
2936 sal->section = section;
2938 /* Unless the explicit_line flag was set, update the SAL line
2939 and symtab to correspond to the modified PC location. */
2940 if (sal->explicit_line)
2943 sal->symtab = start_sal.symtab;
2944 sal->line = start_sal.line;
2945 sal->end = start_sal.end;
2947 /* Check if we are now inside an inlined function. If we can,
2948 use the call site of the function instead. */
2949 b = block_for_pc_sect (sal->pc, sal->section);
2950 function_block = NULL;
2953 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
2955 else if (BLOCK_FUNCTION (b) != NULL)
2957 b = BLOCK_SUPERBLOCK (b);
2959 if (function_block != NULL
2960 && SYMBOL_LINE (BLOCK_FUNCTION (function_block)) != 0)
2962 sal->line = SYMBOL_LINE (BLOCK_FUNCTION (function_block));
2963 sal->symtab = SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block));
2967 /* If P is of the form "operator[ \t]+..." where `...' is
2968 some legitimate operator text, return a pointer to the
2969 beginning of the substring of the operator text.
2970 Otherwise, return "". */
2973 operator_chars (char *p, char **end)
2976 if (strncmp (p, "operator", 8))
2980 /* Don't get faked out by `operator' being part of a longer
2982 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2985 /* Allow some whitespace between `operator' and the operator symbol. */
2986 while (*p == ' ' || *p == '\t')
2989 /* Recognize 'operator TYPENAME'. */
2991 if (isalpha (*p) || *p == '_' || *p == '$')
2995 while (isalnum (*q) || *q == '_' || *q == '$')
3004 case '\\': /* regexp quoting */
3007 if (p[2] == '=') /* 'operator\*=' */
3009 else /* 'operator\*' */
3013 else if (p[1] == '[')
3016 error (_("mismatched quoting on brackets, "
3017 "try 'operator\\[\\]'"));
3018 else if (p[2] == '\\' && p[3] == ']')
3020 *end = p + 4; /* 'operator\[\]' */
3024 error (_("nothing is allowed between '[' and ']'"));
3028 /* Gratuitous qoute: skip it and move on. */
3050 if (p[0] == '-' && p[1] == '>')
3052 /* Struct pointer member operator 'operator->'. */
3055 *end = p + 3; /* 'operator->*' */
3058 else if (p[2] == '\\')
3060 *end = p + 4; /* Hopefully 'operator->\*' */
3065 *end = p + 2; /* 'operator->' */
3069 if (p[1] == '=' || p[1] == p[0])
3080 error (_("`operator ()' must be specified "
3081 "without whitespace in `()'"));
3086 error (_("`operator ?:' must be specified "
3087 "without whitespace in `?:'"));
3092 error (_("`operator []' must be specified "
3093 "without whitespace in `[]'"));
3097 error (_("`operator %s' not supported"), p);
3106 /* Cache to watch for file names already seen by filename_seen. */
3108 struct filename_seen_cache
3110 /* Table of files seen so far. */
3112 /* Initial size of the table. It automagically grows from here. */
3113 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3116 /* filename_seen_cache constructor. */
3118 static struct filename_seen_cache *
3119 create_filename_seen_cache (void)
3121 struct filename_seen_cache *cache;
3123 cache = XNEW (struct filename_seen_cache);
3124 cache->tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE,
3125 filename_hash, filename_eq,
3126 NULL, xcalloc, xfree);
3131 /* Empty the cache, but do not delete it. */
3134 clear_filename_seen_cache (struct filename_seen_cache *cache)
3136 htab_empty (cache->tab);
3139 /* filename_seen_cache destructor.
3140 This takes a void * argument as it is generally used as a cleanup. */
3143 delete_filename_seen_cache (void *ptr)
3145 struct filename_seen_cache *cache = ptr;
3147 htab_delete (cache->tab);
3151 /* If FILE is not already in the table of files in CACHE, return zero;
3152 otherwise return non-zero. Optionally add FILE to the table if ADD
3155 NOTE: We don't manage space for FILE, we assume FILE lives as long
3156 as the caller needs. */
3159 filename_seen (struct filename_seen_cache *cache, const char *file, int add)
3163 /* Is FILE in tab? */
3164 slot = htab_find_slot (cache->tab, file, add ? INSERT : NO_INSERT);
3168 /* No; maybe add it to tab. */
3170 *slot = (char *) file;
3175 /* Data structure to maintain printing state for output_source_filename. */
3177 struct output_source_filename_data
3179 /* Cache of what we've seen so far. */
3180 struct filename_seen_cache *filename_seen_cache;
3182 /* Flag of whether we're printing the first one. */
3186 /* Slave routine for sources_info. Force line breaks at ,'s.
3187 NAME is the name to print.
3188 DATA contains the state for printing and watching for duplicates. */
3191 output_source_filename (const char *name,
3192 struct output_source_filename_data *data)
3194 /* Since a single source file can result in several partial symbol
3195 tables, we need to avoid printing it more than once. Note: if
3196 some of the psymtabs are read in and some are not, it gets
3197 printed both under "Source files for which symbols have been
3198 read" and "Source files for which symbols will be read in on
3199 demand". I consider this a reasonable way to deal with the
3200 situation. I'm not sure whether this can also happen for
3201 symtabs; it doesn't hurt to check. */
3203 /* Was NAME already seen? */
3204 if (filename_seen (data->filename_seen_cache, name, 1))
3206 /* Yes; don't print it again. */
3210 /* No; print it and reset *FIRST. */
3212 printf_filtered (", ");
3216 fputs_filtered (name, gdb_stdout);
3219 /* A callback for map_partial_symbol_filenames. */
3222 output_partial_symbol_filename (const char *filename, const char *fullname,
3225 output_source_filename (fullname ? fullname : filename, data);
3229 sources_info (char *ignore, int from_tty)
3232 struct objfile *objfile;
3233 struct output_source_filename_data data;
3234 struct cleanup *cleanups;
3236 if (!have_full_symbols () && !have_partial_symbols ())
3238 error (_("No symbol table is loaded. Use the \"file\" command."));
3241 data.filename_seen_cache = create_filename_seen_cache ();
3242 cleanups = make_cleanup (delete_filename_seen_cache,
3243 data.filename_seen_cache);
3245 printf_filtered ("Source files for which symbols have been read in:\n\n");
3248 ALL_SYMTABS (objfile, s)
3250 const char *fullname = symtab_to_fullname (s);
3252 output_source_filename (fullname ? fullname : s->filename, &data);
3254 printf_filtered ("\n\n");
3256 printf_filtered ("Source files for which symbols "
3257 "will be read in on demand:\n\n");
3259 clear_filename_seen_cache (data.filename_seen_cache);
3261 map_partial_symbol_filenames (output_partial_symbol_filename, &data,
3262 1 /*need_fullname*/);
3263 printf_filtered ("\n");
3265 do_cleanups (cleanups);
3269 file_matches (const char *file, char *files[], int nfiles)
3273 if (file != NULL && nfiles != 0)
3275 for (i = 0; i < nfiles; i++)
3277 if (filename_cmp (files[i], lbasename (file)) == 0)
3281 else if (nfiles == 0)
3286 /* Free any memory associated with a search. */
3289 free_search_symbols (struct symbol_search *symbols)
3291 struct symbol_search *p;
3292 struct symbol_search *next;
3294 for (p = symbols; p != NULL; p = next)
3302 do_free_search_symbols_cleanup (void *symbols)
3304 free_search_symbols (symbols);
3308 make_cleanup_free_search_symbols (struct symbol_search *symbols)
3310 return make_cleanup (do_free_search_symbols_cleanup, symbols);
3313 /* Helper function for sort_search_symbols and qsort. Can only
3314 sort symbols, not minimal symbols. */
3317 compare_search_syms (const void *sa, const void *sb)
3319 struct symbol_search **sym_a = (struct symbol_search **) sa;
3320 struct symbol_search **sym_b = (struct symbol_search **) sb;
3322 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
3323 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
3326 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3327 prevtail where it is, but update its next pointer to point to
3328 the first of the sorted symbols. */
3330 static struct symbol_search *
3331 sort_search_symbols (struct symbol_search *prevtail, int nfound)
3333 struct symbol_search **symbols, *symp, *old_next;
3336 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
3338 symp = prevtail->next;
3339 for (i = 0; i < nfound; i++)
3344 /* Generally NULL. */
3347 qsort (symbols, nfound, sizeof (struct symbol_search *),
3348 compare_search_syms);
3351 for (i = 0; i < nfound; i++)
3353 symp->next = symbols[i];
3356 symp->next = old_next;
3362 /* An object of this type is passed as the user_data to the
3363 expand_symtabs_matching method. */
3364 struct search_symbols_data
3369 /* It is true if PREG contains valid data, false otherwise. */
3370 unsigned preg_p : 1;
3374 /* A callback for expand_symtabs_matching. */
3377 search_symbols_file_matches (const char *filename, void *user_data)
3379 struct search_symbols_data *data = user_data;
3381 return file_matches (filename, data->files, data->nfiles);
3384 /* A callback for expand_symtabs_matching. */
3387 search_symbols_name_matches (const char *symname, void *user_data)
3389 struct search_symbols_data *data = user_data;
3391 return !data->preg_p || regexec (&data->preg, symname, 0, NULL, 0) == 0;
3394 /* Search the symbol table for matches to the regular expression REGEXP,
3395 returning the results in *MATCHES.
3397 Only symbols of KIND are searched:
3398 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3399 and constants (enums)
3400 FUNCTIONS_DOMAIN - search all functions
3401 TYPES_DOMAIN - search all type names
3402 ALL_DOMAIN - an internal error for this function
3404 free_search_symbols should be called when *MATCHES is no longer needed.
3406 The results are sorted locally; each symtab's global and static blocks are
3407 separately alphabetized. */
3410 search_symbols (char *regexp, enum search_domain kind,
3411 int nfiles, char *files[],
3412 struct symbol_search **matches)
3415 struct blockvector *bv;
3418 struct block_iterator iter;
3420 struct objfile *objfile;
3421 struct minimal_symbol *msymbol;
3423 static const enum minimal_symbol_type types[]
3424 = {mst_data, mst_text, mst_abs};
3425 static const enum minimal_symbol_type types2[]
3426 = {mst_bss, mst_file_text, mst_abs};
3427 static const enum minimal_symbol_type types3[]
3428 = {mst_file_data, mst_solib_trampoline, mst_abs};
3429 static const enum minimal_symbol_type types4[]
3430 = {mst_file_bss, mst_text_gnu_ifunc, mst_abs};
3431 enum minimal_symbol_type ourtype;
3432 enum minimal_symbol_type ourtype2;
3433 enum minimal_symbol_type ourtype3;
3434 enum minimal_symbol_type ourtype4;
3435 struct symbol_search *sr;
3436 struct symbol_search *psr;
3437 struct symbol_search *tail;
3438 struct search_symbols_data datum;
3440 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3441 CLEANUP_CHAIN is freed only in the case of an error. */
3442 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
3443 struct cleanup *retval_chain;
3445 gdb_assert (kind <= TYPES_DOMAIN);
3447 ourtype = types[kind];
3448 ourtype2 = types2[kind];
3449 ourtype3 = types3[kind];
3450 ourtype4 = types4[kind];
3452 sr = *matches = NULL;
3458 /* Make sure spacing is right for C++ operators.
3459 This is just a courtesy to make the matching less sensitive
3460 to how many spaces the user leaves between 'operator'
3461 and <TYPENAME> or <OPERATOR>. */
3463 char *opname = operator_chars (regexp, &opend);
3468 int fix = -1; /* -1 means ok; otherwise number of
3471 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3473 /* There should 1 space between 'operator' and 'TYPENAME'. */
3474 if (opname[-1] != ' ' || opname[-2] == ' ')
3479 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3480 if (opname[-1] == ' ')
3483 /* If wrong number of spaces, fix it. */
3486 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3488 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3493 errcode = regcomp (&datum.preg, regexp,
3494 REG_NOSUB | (case_sensitivity == case_sensitive_off
3498 char *err = get_regcomp_error (errcode, &datum.preg);
3500 make_cleanup (xfree, err);
3501 error (_("Invalid regexp (%s): %s"), err, regexp);
3504 make_regfree_cleanup (&datum.preg);
3507 /* Search through the partial symtabs *first* for all symbols
3508 matching the regexp. That way we don't have to reproduce all of
3509 the machinery below. */
3511 datum.nfiles = nfiles;
3512 datum.files = files;
3513 ALL_OBJFILES (objfile)
3516 objfile->sf->qf->expand_symtabs_matching (objfile,
3519 : search_symbols_file_matches),
3520 search_symbols_name_matches,
3525 retval_chain = old_chain;
3527 /* Here, we search through the minimal symbol tables for functions
3528 and variables that match, and force their symbols to be read.
3529 This is in particular necessary for demangled variable names,
3530 which are no longer put into the partial symbol tables.
3531 The symbol will then be found during the scan of symtabs below.
3533 For functions, find_pc_symtab should succeed if we have debug info
3534 for the function, for variables we have to call
3535 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3537 If the lookup fails, set found_misc so that we will rescan to print
3538 any matching symbols without debug info.
3539 We only search the objfile the msymbol came from, we no longer search
3540 all objfiles. In large programs (1000s of shared libs) searching all
3541 objfiles is not worth the pain. */
3543 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3545 ALL_MSYMBOLS (objfile, msymbol)
3549 if (msymbol->created_by_gdb)
3552 if (MSYMBOL_TYPE (msymbol) == ourtype
3553 || MSYMBOL_TYPE (msymbol) == ourtype2
3554 || MSYMBOL_TYPE (msymbol) == ourtype3
3555 || MSYMBOL_TYPE (msymbol) == ourtype4)
3558 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3561 /* Note: An important side-effect of these lookup functions
3562 is to expand the symbol table if msymbol is found, for the
3563 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3564 if (kind == FUNCTIONS_DOMAIN
3565 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL
3566 : (lookup_symbol_in_objfile_from_linkage_name
3567 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3575 ALL_PRIMARY_SYMTABS (objfile, s)
3577 bv = BLOCKVECTOR (s);
3578 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3580 struct symbol_search *prevtail = tail;
3583 b = BLOCKVECTOR_BLOCK (bv, i);
3584 ALL_BLOCK_SYMBOLS (b, iter, sym)
3586 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3590 if (file_matches (real_symtab->filename, files, nfiles)
3592 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (sym), 0,
3594 && ((kind == VARIABLES_DOMAIN
3595 && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3596 && SYMBOL_CLASS (sym) != LOC_UNRESOLVED
3597 && SYMBOL_CLASS (sym) != LOC_BLOCK
3598 /* LOC_CONST can be used for more than just enums,
3599 e.g., c++ static const members.
3600 We only want to skip enums here. */
3601 && !(SYMBOL_CLASS (sym) == LOC_CONST
3602 && TYPE_CODE (SYMBOL_TYPE (sym))
3604 || (kind == FUNCTIONS_DOMAIN
3605 && SYMBOL_CLASS (sym) == LOC_BLOCK)
3606 || (kind == TYPES_DOMAIN
3607 && SYMBOL_CLASS (sym) == LOC_TYPEDEF))))
3610 psr = (struct symbol_search *)
3611 xmalloc (sizeof (struct symbol_search));
3613 psr->symtab = real_symtab;
3615 psr->msymbol = NULL;
3627 if (prevtail == NULL)
3629 struct symbol_search dummy;
3632 tail = sort_search_symbols (&dummy, nfound);
3635 make_cleanup_free_search_symbols (sr);
3638 tail = sort_search_symbols (prevtail, nfound);
3643 /* If there are no eyes, avoid all contact. I mean, if there are
3644 no debug symbols, then print directly from the msymbol_vector. */
3646 if (found_misc || (nfiles == 0 && kind != FUNCTIONS_DOMAIN))
3648 ALL_MSYMBOLS (objfile, msymbol)
3652 if (msymbol->created_by_gdb)
3655 if (MSYMBOL_TYPE (msymbol) == ourtype
3656 || MSYMBOL_TYPE (msymbol) == ourtype2
3657 || MSYMBOL_TYPE (msymbol) == ourtype3
3658 || MSYMBOL_TYPE (msymbol) == ourtype4)
3661 || regexec (&datum.preg, SYMBOL_NATURAL_NAME (msymbol), 0,
3664 /* For functions we can do a quick check of whether the
3665 symbol might be found via find_pc_symtab. */
3666 if (kind != FUNCTIONS_DOMAIN
3667 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)) == NULL)
3669 if (lookup_symbol_in_objfile_from_linkage_name
3670 (objfile, SYMBOL_LINKAGE_NAME (msymbol), VAR_DOMAIN)
3674 psr = (struct symbol_search *)
3675 xmalloc (sizeof (struct symbol_search));
3677 psr->msymbol = msymbol;
3684 make_cleanup_free_search_symbols (sr);
3696 discard_cleanups (retval_chain);
3697 do_cleanups (old_chain);
3701 /* Helper function for symtab_symbol_info, this function uses
3702 the data returned from search_symbols() to print information
3703 regarding the match to gdb_stdout. */
3706 print_symbol_info (enum search_domain kind,
3707 struct symtab *s, struct symbol *sym,
3708 int block, char *last)
3710 if (last == NULL || filename_cmp (last, s->filename) != 0)
3712 fputs_filtered ("\nFile ", gdb_stdout);
3713 fputs_filtered (s->filename, gdb_stdout);
3714 fputs_filtered (":\n", gdb_stdout);
3717 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3718 printf_filtered ("static ");
3720 /* Typedef that is not a C++ class. */
3721 if (kind == TYPES_DOMAIN
3722 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3723 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3724 /* variable, func, or typedef-that-is-c++-class. */
3725 else if (kind < TYPES_DOMAIN
3726 || (kind == TYPES_DOMAIN
3727 && SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3729 type_print (SYMBOL_TYPE (sym),
3730 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3731 ? "" : SYMBOL_PRINT_NAME (sym)),
3734 printf_filtered (";\n");
3738 /* This help function for symtab_symbol_info() prints information
3739 for non-debugging symbols to gdb_stdout. */
3742 print_msymbol_info (struct minimal_symbol *msymbol)
3744 struct gdbarch *gdbarch = get_objfile_arch (msymbol_objfile (msymbol));
3747 if (gdbarch_addr_bit (gdbarch) <= 32)
3748 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3749 & (CORE_ADDR) 0xffffffff,
3752 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3754 printf_filtered ("%s %s\n",
3755 tmp, SYMBOL_PRINT_NAME (msymbol));
3758 /* This is the guts of the commands "info functions", "info types", and
3759 "info variables". It calls search_symbols to find all matches and then
3760 print_[m]symbol_info to print out some useful information about the
3764 symtab_symbol_info (char *regexp, enum search_domain kind, int from_tty)
3766 static const char * const classnames[] =
3767 {"variable", "function", "type"};
3768 struct symbol_search *symbols;
3769 struct symbol_search *p;
3770 struct cleanup *old_chain;
3771 char *last_filename = NULL;
3774 gdb_assert (kind <= TYPES_DOMAIN);
3776 /* Must make sure that if we're interrupted, symbols gets freed. */
3777 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3778 old_chain = make_cleanup_free_search_symbols (symbols);
3780 printf_filtered (regexp
3781 ? "All %ss matching regular expression \"%s\":\n"
3782 : "All defined %ss:\n",
3783 classnames[kind], regexp);
3785 for (p = symbols; p != NULL; p = p->next)
3789 if (p->msymbol != NULL)
3793 printf_filtered ("\nNon-debugging symbols:\n");
3796 print_msymbol_info (p->msymbol);
3800 print_symbol_info (kind,
3805 last_filename = p->symtab->filename;
3809 do_cleanups (old_chain);
3813 variables_info (char *regexp, int from_tty)
3815 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3819 functions_info (char *regexp, int from_tty)
3821 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3826 types_info (char *regexp, int from_tty)
3828 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3831 /* Breakpoint all functions matching regular expression. */
3834 rbreak_command_wrapper (char *regexp, int from_tty)
3836 rbreak_command (regexp, from_tty);
3839 /* A cleanup function that calls end_rbreak_breakpoints. */
3842 do_end_rbreak_breakpoints (void *ignore)
3844 end_rbreak_breakpoints ();
3848 rbreak_command (char *regexp, int from_tty)
3850 struct symbol_search *ss;
3851 struct symbol_search *p;
3852 struct cleanup *old_chain;
3853 char *string = NULL;
3855 char **files = NULL, *file_name;
3860 char *colon = strchr (regexp, ':');
3862 if (colon && *(colon + 1) != ':')
3866 colon_index = colon - regexp;
3867 file_name = alloca (colon_index + 1);
3868 memcpy (file_name, regexp, colon_index);
3869 file_name[colon_index--] = 0;
3870 while (isspace (file_name[colon_index]))
3871 file_name[colon_index--] = 0;
3875 while (isspace (*regexp)) regexp++;
3879 search_symbols (regexp, FUNCTIONS_DOMAIN, nfiles, files, &ss);
3880 old_chain = make_cleanup_free_search_symbols (ss);
3881 make_cleanup (free_current_contents, &string);
3883 start_rbreak_breakpoints ();
3884 make_cleanup (do_end_rbreak_breakpoints, NULL);
3885 for (p = ss; p != NULL; p = p->next)
3887 if (p->msymbol == NULL)
3889 int newlen = (strlen (p->symtab->filename)
3890 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3895 string = xrealloc (string, newlen);
3898 strcpy (string, p->symtab->filename);
3899 strcat (string, ":'");
3900 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3901 strcat (string, "'");
3902 break_command (string, from_tty);
3903 print_symbol_info (FUNCTIONS_DOMAIN,
3907 p->symtab->filename);
3911 int newlen = (strlen (SYMBOL_LINKAGE_NAME (p->msymbol)) + 3);
3915 string = xrealloc (string, newlen);
3918 strcpy (string, "'");
3919 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3920 strcat (string, "'");
3922 break_command (string, from_tty);
3923 printf_filtered ("<function, no debug info> %s;\n",
3924 SYMBOL_PRINT_NAME (p->msymbol));
3928 do_cleanups (old_chain);
3932 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3934 Either sym_text[sym_text_len] != '(' and then we search for any
3935 symbol starting with SYM_TEXT text.
3937 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3938 be terminated at that point. Partial symbol tables do not have parameters
3942 compare_symbol_name (const char *name, const char *sym_text, int sym_text_len)
3944 int (*ncmp) (const char *, const char *, size_t);
3946 ncmp = (case_sensitivity == case_sensitive_on ? strncmp : strncasecmp);
3948 if (ncmp (name, sym_text, sym_text_len) != 0)
3951 if (sym_text[sym_text_len] == '(')
3953 /* User searches for `name(someth...'. Require NAME to be terminated.
3954 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3955 present but accept even parameters presence. In this case this
3956 function is in fact strcmp_iw but whitespace skipping is not supported
3957 for tab completion. */
3959 if (name[sym_text_len] != '\0' && name[sym_text_len] != '(')
3966 /* Free any memory associated with a completion list. */
3969 free_completion_list (VEC (char_ptr) **list_ptr)
3974 for (i = 0; VEC_iterate (char_ptr, *list_ptr, i, p); ++i)
3976 VEC_free (char_ptr, *list_ptr);
3979 /* Callback for make_cleanup. */
3982 do_free_completion_list (void *list)
3984 free_completion_list (list);
3987 /* Helper routine for make_symbol_completion_list. */
3989 static VEC (char_ptr) *return_val;
3991 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3992 completion_list_add_name \
3993 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3995 /* Test to see if the symbol specified by SYMNAME (which is already
3996 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3997 characters. If so, add it to the current completion list. */
4000 completion_list_add_name (const char *symname,
4001 const char *sym_text, int sym_text_len,
4002 const char *text, const char *word)
4006 /* Clip symbols that cannot match. */
4007 if (!compare_symbol_name (symname, sym_text, sym_text_len))
4010 /* We have a match for a completion, so add SYMNAME to the current list
4011 of matches. Note that the name is moved to freshly malloc'd space. */
4016 if (word == sym_text)
4018 new = xmalloc (strlen (symname) + 5);
4019 strcpy (new, symname);
4021 else if (word > sym_text)
4023 /* Return some portion of symname. */
4024 new = xmalloc (strlen (symname) + 5);
4025 strcpy (new, symname + (word - sym_text));
4029 /* Return some of SYM_TEXT plus symname. */
4030 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
4031 strncpy (new, word, sym_text - word);
4032 new[sym_text - word] = '\0';
4033 strcat (new, symname);
4036 VEC_safe_push (char_ptr, return_val, new);
4040 /* ObjC: In case we are completing on a selector, look as the msymbol
4041 again and feed all the selectors into the mill. */
4044 completion_list_objc_symbol (struct minimal_symbol *msymbol,
4045 const char *sym_text, int sym_text_len,
4046 const char *text, const char *word)
4048 static char *tmp = NULL;
4049 static unsigned int tmplen = 0;
4051 const char *method, *category, *selector;
4054 method = SYMBOL_NATURAL_NAME (msymbol);
4056 /* Is it a method? */
4057 if ((method[0] != '-') && (method[0] != '+'))
4060 if (sym_text[0] == '[')
4061 /* Complete on shortened method method. */
4062 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
4064 while ((strlen (method) + 1) >= tmplen)
4070 tmp = xrealloc (tmp, tmplen);
4072 selector = strchr (method, ' ');
4073 if (selector != NULL)
4076 category = strchr (method, '(');
4078 if ((category != NULL) && (selector != NULL))
4080 memcpy (tmp, method, (category - method));
4081 tmp[category - method] = ' ';
4082 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
4083 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4084 if (sym_text[0] == '[')
4085 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
4088 if (selector != NULL)
4090 /* Complete on selector only. */
4091 strcpy (tmp, selector);
4092 tmp2 = strchr (tmp, ']');
4096 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
4100 /* Break the non-quoted text based on the characters which are in
4101 symbols. FIXME: This should probably be language-specific. */
4104 language_search_unquoted_string (char *text, char *p)
4106 for (; p > text; --p)
4108 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
4112 if ((current_language->la_language == language_objc))
4114 if (p[-1] == ':') /* Might be part of a method name. */
4116 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
4117 p -= 2; /* Beginning of a method name. */
4118 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
4119 { /* Might be part of a method name. */
4122 /* Seeing a ' ' or a '(' is not conclusive evidence
4123 that we are in the middle of a method name. However,
4124 finding "-[" or "+[" should be pretty un-ambiguous.
4125 Unfortunately we have to find it now to decide. */
4128 if (isalnum (t[-1]) || t[-1] == '_' ||
4129 t[-1] == ' ' || t[-1] == ':' ||
4130 t[-1] == '(' || t[-1] == ')')
4135 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
4136 p = t - 2; /* Method name detected. */
4137 /* Else we leave with p unchanged. */
4147 completion_list_add_fields (struct symbol *sym, char *sym_text,
4148 int sym_text_len, char *text, char *word)
4150 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
4152 struct type *t = SYMBOL_TYPE (sym);
4153 enum type_code c = TYPE_CODE (t);
4156 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
4157 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
4158 if (TYPE_FIELD_NAME (t, j))
4159 completion_list_add_name (TYPE_FIELD_NAME (t, j),
4160 sym_text, sym_text_len, text, word);
4164 /* Type of the user_data argument passed to add_macro_name or
4165 expand_partial_symbol_name. The contents are simply whatever is
4166 needed by completion_list_add_name. */
4167 struct add_name_data
4175 /* A callback used with macro_for_each and macro_for_each_in_scope.
4176 This adds a macro's name to the current completion list. */
4179 add_macro_name (const char *name, const struct macro_definition *ignore,
4180 struct macro_source_file *ignore2, int ignore3,
4183 struct add_name_data *datum = (struct add_name_data *) user_data;
4185 completion_list_add_name ((char *) name,
4186 datum->sym_text, datum->sym_text_len,
4187 datum->text, datum->word);
4190 /* A callback for expand_partial_symbol_names. */
4193 expand_partial_symbol_name (const char *name, void *user_data)
4195 struct add_name_data *datum = (struct add_name_data *) user_data;
4197 return compare_symbol_name (name, datum->sym_text, datum->sym_text_len);
4201 default_make_symbol_completion_list_break_on (char *text, char *word,
4202 const char *break_on)
4204 /* Problem: All of the symbols have to be copied because readline
4205 frees them. I'm not going to worry about this; hopefully there
4206 won't be that many. */
4210 struct minimal_symbol *msymbol;
4211 struct objfile *objfile;
4213 const struct block *surrounding_static_block, *surrounding_global_block;
4214 struct block_iterator iter;
4215 /* The symbol we are completing on. Points in same buffer as text. */
4217 /* Length of sym_text. */
4219 struct add_name_data datum;
4220 struct cleanup *back_to;
4222 /* Now look for the symbol we are supposed to complete on. */
4226 char *quote_pos = NULL;
4228 /* First see if this is a quoted string. */
4230 for (p = text; *p != '\0'; ++p)
4232 if (quote_found != '\0')
4234 if (*p == quote_found)
4235 /* Found close quote. */
4237 else if (*p == '\\' && p[1] == quote_found)
4238 /* A backslash followed by the quote character
4239 doesn't end the string. */
4242 else if (*p == '\'' || *p == '"')
4248 if (quote_found == '\'')
4249 /* A string within single quotes can be a symbol, so complete on it. */
4250 sym_text = quote_pos + 1;
4251 else if (quote_found == '"')
4252 /* A double-quoted string is never a symbol, nor does it make sense
4253 to complete it any other way. */
4259 /* It is not a quoted string. Break it based on the characters
4260 which are in symbols. */
4263 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0'
4264 || p[-1] == ':' || strchr (break_on, p[-1]) != NULL)
4273 sym_text_len = strlen (sym_text);
4275 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4277 if (current_language->la_language == language_cplus
4278 || current_language->la_language == language_java
4279 || current_language->la_language == language_fortran)
4281 /* These languages may have parameters entered by user but they are never
4282 present in the partial symbol tables. */
4284 const char *cs = memchr (sym_text, '(', sym_text_len);
4287 sym_text_len = cs - sym_text;
4289 gdb_assert (sym_text[sym_text_len] == '\0' || sym_text[sym_text_len] == '(');
4292 back_to = make_cleanup (do_free_completion_list, &return_val);
4294 datum.sym_text = sym_text;
4295 datum.sym_text_len = sym_text_len;
4299 /* Look through the partial symtabs for all symbols which begin
4300 by matching SYM_TEXT. Expand all CUs that you find to the list.
4301 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4302 expand_partial_symbol_names (expand_partial_symbol_name, &datum);
4304 /* At this point scan through the misc symbol vectors and add each
4305 symbol you find to the list. Eventually we want to ignore
4306 anything that isn't a text symbol (everything else will be
4307 handled by the psymtab code above). */
4309 ALL_MSYMBOLS (objfile, msymbol)
4312 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
4314 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
4317 /* Search upwards from currently selected frame (so that we can
4318 complete on local vars). Also catch fields of types defined in
4319 this places which match our text string. Only complete on types
4320 visible from current context. */
4322 b = get_selected_block (0);
4323 surrounding_static_block = block_static_block (b);
4324 surrounding_global_block = block_global_block (b);
4325 if (surrounding_static_block != NULL)
4326 while (b != surrounding_static_block)
4330 ALL_BLOCK_SYMBOLS (b, iter, sym)
4332 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text,
4334 completion_list_add_fields (sym, sym_text, sym_text_len, text,
4338 /* Stop when we encounter an enclosing function. Do not stop for
4339 non-inlined functions - the locals of the enclosing function
4340 are in scope for a nested function. */
4341 if (BLOCK_FUNCTION (b) != NULL && block_inlined_p (b))
4343 b = BLOCK_SUPERBLOCK (b);
4346 /* Add fields from the file's types; symbols will be added below. */
4348 if (surrounding_static_block != NULL)
4349 ALL_BLOCK_SYMBOLS (surrounding_static_block, iter, sym)
4350 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4352 if (surrounding_global_block != NULL)
4353 ALL_BLOCK_SYMBOLS (surrounding_global_block, iter, sym)
4354 completion_list_add_fields (sym, sym_text, sym_text_len, text, word);
4356 /* Go through the symtabs and check the externs and statics for
4357 symbols which match. */
4359 ALL_PRIMARY_SYMTABS (objfile, s)
4362 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4363 ALL_BLOCK_SYMBOLS (b, iter, sym)
4365 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4369 ALL_PRIMARY_SYMTABS (objfile, s)
4372 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4373 ALL_BLOCK_SYMBOLS (b, iter, sym)
4375 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4379 if (current_language->la_macro_expansion == macro_expansion_c)
4381 struct macro_scope *scope;
4383 /* Add any macros visible in the default scope. Note that this
4384 may yield the occasional wrong result, because an expression
4385 might be evaluated in a scope other than the default. For
4386 example, if the user types "break file:line if <TAB>", the
4387 resulting expression will be evaluated at "file:line" -- but
4388 at there does not seem to be a way to detect this at
4390 scope = default_macro_scope ();
4393 macro_for_each_in_scope (scope->file, scope->line,
4394 add_macro_name, &datum);
4398 /* User-defined macros are always visible. */
4399 macro_for_each (macro_user_macros, add_macro_name, &datum);
4402 discard_cleanups (back_to);
4403 return (return_val);
4407 default_make_symbol_completion_list (char *text, char *word)
4409 return default_make_symbol_completion_list_break_on (text, word, "");
4412 /* Return a vector of all symbols (regardless of class) which begin by
4413 matching TEXT. If the answer is no symbols, then the return value
4417 make_symbol_completion_list (char *text, char *word)
4419 return current_language->la_make_symbol_completion_list (text, word);
4422 /* Like make_symbol_completion_list, but suitable for use as a
4423 completion function. */
4426 make_symbol_completion_list_fn (struct cmd_list_element *ignore,
4427 char *text, char *word)
4429 return make_symbol_completion_list (text, word);
4432 /* Like make_symbol_completion_list, but returns a list of symbols
4433 defined in a source file FILE. */
4436 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
4441 struct block_iterator iter;
4442 /* The symbol we are completing on. Points in same buffer as text. */
4444 /* Length of sym_text. */
4447 /* Now look for the symbol we are supposed to complete on.
4448 FIXME: This should be language-specific. */
4452 char *quote_pos = NULL;
4454 /* First see if this is a quoted string. */
4456 for (p = text; *p != '\0'; ++p)
4458 if (quote_found != '\0')
4460 if (*p == quote_found)
4461 /* Found close quote. */
4463 else if (*p == '\\' && p[1] == quote_found)
4464 /* A backslash followed by the quote character
4465 doesn't end the string. */
4468 else if (*p == '\'' || *p == '"')
4474 if (quote_found == '\'')
4475 /* A string within single quotes can be a symbol, so complete on it. */
4476 sym_text = quote_pos + 1;
4477 else if (quote_found == '"')
4478 /* A double-quoted string is never a symbol, nor does it make sense
4479 to complete it any other way. */
4485 /* Not a quoted string. */
4486 sym_text = language_search_unquoted_string (text, p);
4490 sym_text_len = strlen (sym_text);
4494 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4496 s = lookup_symtab (srcfile);
4499 /* Maybe they typed the file with leading directories, while the
4500 symbol tables record only its basename. */
4501 const char *tail = lbasename (srcfile);
4504 s = lookup_symtab (tail);
4507 /* If we have no symtab for that file, return an empty list. */
4509 return (return_val);
4511 /* Go through this symtab and check the externs and statics for
4512 symbols which match. */
4514 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4515 ALL_BLOCK_SYMBOLS (b, iter, sym)
4517 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4520 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4521 ALL_BLOCK_SYMBOLS (b, iter, sym)
4523 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
4526 return (return_val);
4529 /* A helper function for make_source_files_completion_list. It adds
4530 another file name to a list of possible completions, growing the
4531 list as necessary. */
4534 add_filename_to_list (const char *fname, char *text, char *word,
4535 VEC (char_ptr) **list)
4538 size_t fnlen = strlen (fname);
4542 /* Return exactly fname. */
4543 new = xmalloc (fnlen + 5);
4544 strcpy (new, fname);
4546 else if (word > text)
4548 /* Return some portion of fname. */
4549 new = xmalloc (fnlen + 5);
4550 strcpy (new, fname + (word - text));
4554 /* Return some of TEXT plus fname. */
4555 new = xmalloc (fnlen + (text - word) + 5);
4556 strncpy (new, word, text - word);
4557 new[text - word] = '\0';
4558 strcat (new, fname);
4560 VEC_safe_push (char_ptr, *list, new);
4564 not_interesting_fname (const char *fname)
4566 static const char *illegal_aliens[] = {
4567 "_globals_", /* inserted by coff_symtab_read */
4572 for (i = 0; illegal_aliens[i]; i++)
4574 if (filename_cmp (fname, illegal_aliens[i]) == 0)
4580 /* An object of this type is passed as the user_data argument to
4581 map_partial_symbol_filenames. */
4582 struct add_partial_filename_data
4584 struct filename_seen_cache *filename_seen_cache;
4588 VEC (char_ptr) **list;
4591 /* A callback for map_partial_symbol_filenames. */
4594 maybe_add_partial_symtab_filename (const char *filename, const char *fullname,
4597 struct add_partial_filename_data *data = user_data;
4599 if (not_interesting_fname (filename))
4601 if (!filename_seen (data->filename_seen_cache, filename, 1)
4602 && filename_ncmp (filename, data->text, data->text_len) == 0)
4604 /* This file matches for a completion; add it to the
4605 current list of matches. */
4606 add_filename_to_list (filename, data->text, data->word, data->list);
4610 const char *base_name = lbasename (filename);
4612 if (base_name != filename
4613 && !filename_seen (data->filename_seen_cache, base_name, 1)
4614 && filename_ncmp (base_name, data->text, data->text_len) == 0)
4615 add_filename_to_list (base_name, data->text, data->word, data->list);
4619 /* Return a vector of all source files whose names begin with matching
4620 TEXT. The file names are looked up in the symbol tables of this
4621 program. If the answer is no matchess, then the return value is
4625 make_source_files_completion_list (char *text, char *word)
4628 struct objfile *objfile;
4629 size_t text_len = strlen (text);
4630 VEC (char_ptr) *list = NULL;
4631 const char *base_name;
4632 struct add_partial_filename_data datum;
4633 struct filename_seen_cache *filename_seen_cache;
4634 struct cleanup *back_to, *cache_cleanup;
4636 if (!have_full_symbols () && !have_partial_symbols ())
4639 back_to = make_cleanup (do_free_completion_list, &list);
4641 filename_seen_cache = create_filename_seen_cache ();
4642 cache_cleanup = make_cleanup (delete_filename_seen_cache,
4643 filename_seen_cache);
4645 ALL_SYMTABS (objfile, s)
4647 if (not_interesting_fname (s->filename))
4649 if (!filename_seen (filename_seen_cache, s->filename, 1)
4650 && filename_ncmp (s->filename, text, text_len) == 0)
4652 /* This file matches for a completion; add it to the current
4654 add_filename_to_list (s->filename, text, word, &list);
4658 /* NOTE: We allow the user to type a base name when the
4659 debug info records leading directories, but not the other
4660 way around. This is what subroutines of breakpoint
4661 command do when they parse file names. */
4662 base_name = lbasename (s->filename);
4663 if (base_name != s->filename
4664 && !filename_seen (filename_seen_cache, base_name, 1)
4665 && filename_ncmp (base_name, text, text_len) == 0)
4666 add_filename_to_list (base_name, text, word, &list);
4670 datum.filename_seen_cache = filename_seen_cache;
4673 datum.text_len = text_len;
4675 map_partial_symbol_filenames (maybe_add_partial_symtab_filename, &datum,
4676 0 /*need_fullname*/);
4678 do_cleanups (cache_cleanup);
4679 discard_cleanups (back_to);
4684 /* Determine if PC is in the prologue of a function. The prologue is the area
4685 between the first instruction of a function, and the first executable line.
4686 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4688 If non-zero, func_start is where we think the prologue starts, possibly
4689 by previous examination of symbol table information. */
4692 in_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR func_start)
4694 struct symtab_and_line sal;
4695 CORE_ADDR func_addr, func_end;
4697 /* We have several sources of information we can consult to figure
4699 - Compilers usually emit line number info that marks the prologue
4700 as its own "source line". So the ending address of that "line"
4701 is the end of the prologue. If available, this is the most
4703 - The minimal symbols and partial symbols, which can usually tell
4704 us the starting and ending addresses of a function.
4705 - If we know the function's start address, we can call the
4706 architecture-defined gdbarch_skip_prologue function to analyze the
4707 instruction stream and guess where the prologue ends.
4708 - Our `func_start' argument; if non-zero, this is the caller's
4709 best guess as to the function's entry point. At the time of
4710 this writing, handle_inferior_event doesn't get this right, so
4711 it should be our last resort. */
4713 /* Consult the partial symbol table, to find which function
4715 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4717 CORE_ADDR prologue_end;
4719 /* We don't even have minsym information, so fall back to using
4720 func_start, if given. */
4722 return 1; /* We *might* be in a prologue. */
4724 prologue_end = gdbarch_skip_prologue (gdbarch, func_start);
4726 return func_start <= pc && pc < prologue_end;
4729 /* If we have line number information for the function, that's
4730 usually pretty reliable. */
4731 sal = find_pc_line (func_addr, 0);
4733 /* Now sal describes the source line at the function's entry point,
4734 which (by convention) is the prologue. The end of that "line",
4735 sal.end, is the end of the prologue.
4737 Note that, for functions whose source code is all on a single
4738 line, the line number information doesn't always end up this way.
4739 So we must verify that our purported end-of-prologue address is
4740 *within* the function, not at its start or end. */
4742 || sal.end <= func_addr
4743 || func_end <= sal.end)
4745 /* We don't have any good line number info, so use the minsym
4746 information, together with the architecture-specific prologue
4748 CORE_ADDR prologue_end = gdbarch_skip_prologue (gdbarch, func_addr);
4750 return func_addr <= pc && pc < prologue_end;
4753 /* We have line number info, and it looks good. */
4754 return func_addr <= pc && pc < sal.end;
4757 /* Given PC at the function's start address, attempt to find the
4758 prologue end using SAL information. Return zero if the skip fails.
4760 A non-optimized prologue traditionally has one SAL for the function
4761 and a second for the function body. A single line function has
4762 them both pointing at the same line.
4764 An optimized prologue is similar but the prologue may contain
4765 instructions (SALs) from the instruction body. Need to skip those
4766 while not getting into the function body.
4768 The functions end point and an increasing SAL line are used as
4769 indicators of the prologue's endpoint.
4771 This code is based on the function refine_prologue_limit
4775 skip_prologue_using_sal (struct gdbarch *gdbarch, CORE_ADDR func_addr)
4777 struct symtab_and_line prologue_sal;
4782 /* Get an initial range for the function. */
4783 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4784 start_pc += gdbarch_deprecated_function_start_offset (gdbarch);
4786 prologue_sal = find_pc_line (start_pc, 0);
4787 if (prologue_sal.line != 0)
4789 /* For languages other than assembly, treat two consecutive line
4790 entries at the same address as a zero-instruction prologue.
4791 The GNU assembler emits separate line notes for each instruction
4792 in a multi-instruction macro, but compilers generally will not
4794 if (prologue_sal.symtab->language != language_asm)
4796 struct linetable *linetable = LINETABLE (prologue_sal.symtab);
4799 /* Skip any earlier lines, and any end-of-sequence marker
4800 from a previous function. */
4801 while (linetable->item[idx].pc != prologue_sal.pc
4802 || linetable->item[idx].line == 0)
4805 if (idx+1 < linetable->nitems
4806 && linetable->item[idx+1].line != 0
4807 && linetable->item[idx+1].pc == start_pc)
4811 /* If there is only one sal that covers the entire function,
4812 then it is probably a single line function, like
4814 if (prologue_sal.end >= end_pc)
4817 while (prologue_sal.end < end_pc)
4819 struct symtab_and_line sal;
4821 sal = find_pc_line (prologue_sal.end, 0);
4824 /* Assume that a consecutive SAL for the same (or larger)
4825 line mark the prologue -> body transition. */
4826 if (sal.line >= prologue_sal.line)
4829 /* The line number is smaller. Check that it's from the
4830 same function, not something inlined. If it's inlined,
4831 then there is no point comparing the line numbers. */
4832 bl = block_for_pc (prologue_sal.end);
4835 if (block_inlined_p (bl))
4837 if (BLOCK_FUNCTION (bl))
4842 bl = BLOCK_SUPERBLOCK (bl);
4847 /* The case in which compiler's optimizer/scheduler has
4848 moved instructions into the prologue. We look ahead in
4849 the function looking for address ranges whose
4850 corresponding line number is less the first one that we
4851 found for the function. This is more conservative then
4852 refine_prologue_limit which scans a large number of SALs
4853 looking for any in the prologue. */
4858 if (prologue_sal.end < end_pc)
4859 /* Return the end of this line, or zero if we could not find a
4861 return prologue_sal.end;
4863 /* Don't return END_PC, which is past the end of the function. */
4864 return prologue_sal.pc;
4868 static char *name_of_main;
4869 enum language language_of_main = language_unknown;
4872 set_main_name (const char *name)
4874 if (name_of_main != NULL)
4876 xfree (name_of_main);
4877 name_of_main = NULL;
4878 language_of_main = language_unknown;
4882 name_of_main = xstrdup (name);
4883 language_of_main = language_unknown;
4887 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4891 find_main_name (void)
4893 const char *new_main_name;
4895 /* Try to see if the main procedure is in Ada. */
4896 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4897 be to add a new method in the language vector, and call this
4898 method for each language until one of them returns a non-empty
4899 name. This would allow us to remove this hard-coded call to
4900 an Ada function. It is not clear that this is a better approach
4901 at this point, because all methods need to be written in a way
4902 such that false positives never be returned. For instance, it is
4903 important that a method does not return a wrong name for the main
4904 procedure if the main procedure is actually written in a different
4905 language. It is easy to guaranty this with Ada, since we use a
4906 special symbol generated only when the main in Ada to find the name
4907 of the main procedure. It is difficult however to see how this can
4908 be guarantied for languages such as C, for instance. This suggests
4909 that order of call for these methods becomes important, which means
4910 a more complicated approach. */
4911 new_main_name = ada_main_name ();
4912 if (new_main_name != NULL)
4914 set_main_name (new_main_name);
4918 new_main_name = go_main_name ();
4919 if (new_main_name != NULL)
4921 set_main_name (new_main_name);
4925 new_main_name = pascal_main_name ();
4926 if (new_main_name != NULL)
4928 set_main_name (new_main_name);
4932 /* The languages above didn't identify the name of the main procedure.
4933 Fallback to "main". */
4934 set_main_name ("main");
4940 if (name_of_main == NULL)
4943 return name_of_main;
4946 /* Handle ``executable_changed'' events for the symtab module. */
4949 symtab_observer_executable_changed (void)
4951 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4952 set_main_name (NULL);
4955 /* Return 1 if the supplied producer string matches the ARM RealView
4956 compiler (armcc). */
4959 producer_is_realview (const char *producer)
4961 static const char *const arm_idents[] = {
4962 "ARM C Compiler, ADS",
4963 "Thumb C Compiler, ADS",
4964 "ARM C++ Compiler, ADS",
4965 "Thumb C++ Compiler, ADS",
4966 "ARM/Thumb C/C++ Compiler, RVCT",
4967 "ARM C/C++ Compiler, RVCT"
4971 if (producer == NULL)
4974 for (i = 0; i < ARRAY_SIZE (arm_idents); i++)
4975 if (strncmp (producer, arm_idents[i], strlen (arm_idents[i])) == 0)
4982 _initialize_symtab (void)
4984 add_info ("variables", variables_info, _("\
4985 All global and static variable names, or those matching REGEXP."));
4987 add_com ("whereis", class_info, variables_info, _("\
4988 All global and static variable names, or those matching REGEXP."));
4990 add_info ("functions", functions_info,
4991 _("All function names, or those matching REGEXP."));
4993 /* FIXME: This command has at least the following problems:
4994 1. It prints builtin types (in a very strange and confusing fashion).
4995 2. It doesn't print right, e.g. with
4996 typedef struct foo *FOO
4997 type_print prints "FOO" when we want to make it (in this situation)
4998 print "struct foo *".
4999 I also think "ptype" or "whatis" is more likely to be useful (but if
5000 there is much disagreement "info types" can be fixed). */
5001 add_info ("types", types_info,
5002 _("All type names, or those matching REGEXP."));
5004 add_info ("sources", sources_info,
5005 _("Source files in the program."));
5007 add_com ("rbreak", class_breakpoint, rbreak_command,
5008 _("Set a breakpoint for all functions matching REGEXP."));
5012 add_com ("lf", class_info, sources_info,
5013 _("Source files in the program"));
5014 add_com ("lg", class_info, variables_info, _("\
5015 All global and static variable names, or those matching REGEXP."));
5018 add_setshow_enum_cmd ("multiple-symbols", no_class,
5019 multiple_symbols_modes, &multiple_symbols_mode,
5021 Set the debugger behavior when more than one symbol are possible matches\n\
5022 in an expression."), _("\
5023 Show how the debugger handles ambiguities in expressions."), _("\
5024 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5025 NULL, NULL, &setlist, &showlist);
5027 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure,
5028 &basenames_may_differ, _("\
5029 Set whether a source file may have multiple base names."), _("\
5030 Show whether a source file may have multiple base names."), _("\
5031 (A \"base name\" is the name of a file with the directory part removed.\n\
5032 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5033 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5034 before comparing them. Canonicalization is an expensive operation,\n\
5035 but it allows the same file be known by more than one base name.\n\
5036 If not set (the default), all source files are assumed to have just\n\
5037 one base name, and gdb will do file name comparisons more efficiently."),
5039 &setlist, &showlist);
5041 add_setshow_boolean_cmd ("symtab-create", no_class, &symtab_create_debug,
5042 _("Set debugging of symbol table creation."),
5043 _("Show debugging of symbol table creation."), _("\
5044 When enabled, debugging messages are printed when building symbol tables."),
5047 &setdebuglist, &showdebuglist);
5049 observer_attach_executable_changed (symtab_observer_executable_changed);