1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
32 #include "call-cmds.h"
33 #include "gdb_regex.h"
34 #include "expression.h"
40 #include "filenames.h" /* for FILENAME_CMP */
41 #include "objc-lang.h"
48 #include "gdb_obstack.h"
50 #include "dictionary.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
59 #include "gdb_assert.h"
62 /* Prototypes for local functions */
64 static void completion_list_add_name (char *, char *, int, char *, char *);
66 static void rbreak_command (char *, int);
68 static void types_info (char *, int);
70 static void functions_info (char *, int);
72 static void variables_info (char *, int);
74 static void sources_info (char *, int);
76 static void output_source_filename (const char *, int *);
78 static int find_line_common (struct linetable *, int, int *);
80 /* This one is used by linespec.c */
82 char *operator_chars (char *p, char **end);
84 static struct symbol *lookup_symbol_aux (const char *name,
85 const char *linkage_name,
86 const struct block *block,
87 const domain_enum domain,
88 enum language language,
89 int *is_a_field_of_this);
92 struct symbol *lookup_symbol_aux_local (const char *name,
93 const char *linkage_name,
94 const struct block *block,
95 const domain_enum domain);
98 struct symbol *lookup_symbol_aux_symtabs (int block_index,
100 const char *linkage_name,
101 const domain_enum domain);
104 struct symbol *lookup_symbol_aux_psymtabs (int block_index,
106 const char *linkage_name,
107 const domain_enum domain);
109 static int file_matches (char *, char **, int);
111 static void print_symbol_info (domain_enum,
112 struct symtab *, struct symbol *, int, char *);
114 static void print_msymbol_info (struct minimal_symbol *);
116 static void symtab_symbol_info (char *, domain_enum, int);
118 void _initialize_symtab (void);
122 /* Allow the user to configure the debugger behavior with respect
123 to multiple-choice menus when more than one symbol matches during
126 const char multiple_symbols_ask[] = "ask";
127 const char multiple_symbols_all[] = "all";
128 const char multiple_symbols_cancel[] = "cancel";
129 static const char *multiple_symbols_modes[] =
131 multiple_symbols_ask,
132 multiple_symbols_all,
133 multiple_symbols_cancel,
136 static const char *multiple_symbols_mode = multiple_symbols_all;
138 /* Read-only accessor to AUTO_SELECT_MODE. */
141 multiple_symbols_select_mode (void)
143 return multiple_symbols_mode;
146 /* The single non-language-specific builtin type */
147 struct type *builtin_type_error;
149 /* Block in which the most recently searched-for symbol was found.
150 Might be better to make this a parameter to lookup_symbol and
153 const struct block *block_found;
155 /* Check for a symtab of a specific name; first in symtabs, then in
156 psymtabs. *If* there is no '/' in the name, a match after a '/'
157 in the symtab filename will also work. */
160 lookup_symtab (const char *name)
163 struct partial_symtab *ps;
164 struct objfile *objfile;
165 char *real_path = NULL;
166 char *full_path = NULL;
168 /* Here we are interested in canonicalizing an absolute path, not
169 absolutizing a relative path. */
170 if (IS_ABSOLUTE_PATH (name))
172 full_path = xfullpath (name);
173 make_cleanup (xfree, full_path);
174 real_path = gdb_realpath (name);
175 make_cleanup (xfree, real_path);
180 /* First, search for an exact match */
182 ALL_SYMTABS (objfile, s)
184 if (FILENAME_CMP (name, s->filename) == 0)
189 /* If the user gave us an absolute path, try to find the file in
190 this symtab and use its absolute path. */
192 if (full_path != NULL)
194 const char *fp = symtab_to_fullname (s);
195 if (fp != NULL && FILENAME_CMP (full_path, fp) == 0)
201 if (real_path != NULL)
203 char *fullname = symtab_to_fullname (s);
204 if (fullname != NULL)
206 char *rp = gdb_realpath (fullname);
207 make_cleanup (xfree, rp);
208 if (FILENAME_CMP (real_path, rp) == 0)
216 /* Now, search for a matching tail (only if name doesn't have any dirs) */
218 if (lbasename (name) == name)
219 ALL_SYMTABS (objfile, s)
221 if (FILENAME_CMP (lbasename (s->filename), name) == 0)
225 /* Same search rules as above apply here, but now we look thru the
228 ps = lookup_partial_symtab (name);
233 error (_("Internal: readin %s pst for `%s' found when no symtab found."),
236 s = PSYMTAB_TO_SYMTAB (ps);
241 /* At this point, we have located the psymtab for this file, but
242 the conversion to a symtab has failed. This usually happens
243 when we are looking up an include file. In this case,
244 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
245 been created. So, we need to run through the symtabs again in
246 order to find the file.
247 XXX - This is a crock, and should be fixed inside of the the
248 symbol parsing routines. */
252 /* Lookup the partial symbol table of a source file named NAME.
253 *If* there is no '/' in the name, a match after a '/'
254 in the psymtab filename will also work. */
256 struct partial_symtab *
257 lookup_partial_symtab (const char *name)
259 struct partial_symtab *pst;
260 struct objfile *objfile;
261 char *full_path = NULL;
262 char *real_path = NULL;
264 /* Here we are interested in canonicalizing an absolute path, not
265 absolutizing a relative path. */
266 if (IS_ABSOLUTE_PATH (name))
268 full_path = xfullpath (name);
269 make_cleanup (xfree, full_path);
270 real_path = gdb_realpath (name);
271 make_cleanup (xfree, real_path);
274 ALL_PSYMTABS (objfile, pst)
276 if (FILENAME_CMP (name, pst->filename) == 0)
281 /* If the user gave us an absolute path, try to find the file in
282 this symtab and use its absolute path. */
283 if (full_path != NULL)
285 psymtab_to_fullname (pst);
286 if (pst->fullname != NULL
287 && FILENAME_CMP (full_path, pst->fullname) == 0)
293 if (real_path != NULL)
296 psymtab_to_fullname (pst);
297 if (pst->fullname != NULL)
299 rp = gdb_realpath (pst->fullname);
300 make_cleanup (xfree, rp);
302 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
309 /* Now, search for a matching tail (only if name doesn't have any dirs) */
311 if (lbasename (name) == name)
312 ALL_PSYMTABS (objfile, pst)
314 if (FILENAME_CMP (lbasename (pst->filename), name) == 0)
321 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
322 full method name, which consist of the class name (from T), the unadorned
323 method name from METHOD_ID, and the signature for the specific overload,
324 specified by SIGNATURE_ID. Note that this function is g++ specific. */
327 gdb_mangle_name (struct type *type, int method_id, int signature_id)
329 int mangled_name_len;
331 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
332 struct fn_field *method = &f[signature_id];
333 char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
334 char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
335 char *newname = type_name_no_tag (type);
337 /* Does the form of physname indicate that it is the full mangled name
338 of a constructor (not just the args)? */
339 int is_full_physname_constructor;
342 int is_destructor = is_destructor_name (physname);
343 /* Need a new type prefix. */
344 char *const_prefix = method->is_const ? "C" : "";
345 char *volatile_prefix = method->is_volatile ? "V" : "";
347 int len = (newname == NULL ? 0 : strlen (newname));
349 /* Nothing to do if physname already contains a fully mangled v3 abi name
350 or an operator name. */
351 if ((physname[0] == '_' && physname[1] == 'Z')
352 || is_operator_name (field_name))
353 return xstrdup (physname);
355 is_full_physname_constructor = is_constructor_name (physname);
358 is_full_physname_constructor || (newname && strcmp (field_name, newname) == 0);
361 is_destructor = (strncmp (physname, "__dt", 4) == 0);
363 if (is_destructor || is_full_physname_constructor)
365 mangled_name = (char *) xmalloc (strlen (physname) + 1);
366 strcpy (mangled_name, physname);
372 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
374 else if (physname[0] == 't' || physname[0] == 'Q')
376 /* The physname for template and qualified methods already includes
378 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
384 sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
386 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
387 + strlen (buf) + len + strlen (physname) + 1);
390 mangled_name = (char *) xmalloc (mangled_name_len);
392 mangled_name[0] = '\0';
394 strcpy (mangled_name, field_name);
396 strcat (mangled_name, buf);
397 /* If the class doesn't have a name, i.e. newname NULL, then we just
398 mangle it using 0 for the length of the class. Thus it gets mangled
399 as something starting with `::' rather than `classname::'. */
401 strcat (mangled_name, newname);
403 strcat (mangled_name, physname);
404 return (mangled_name);
408 /* Initialize the language dependent portion of a symbol
409 depending upon the language for the symbol. */
411 symbol_init_language_specific (struct general_symbol_info *gsymbol,
412 enum language language)
414 gsymbol->language = language;
415 if (gsymbol->language == language_cplus
416 || gsymbol->language == language_java
417 || gsymbol->language == language_objc)
419 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
423 memset (&gsymbol->language_specific, 0,
424 sizeof (gsymbol->language_specific));
428 /* Functions to initialize a symbol's mangled name. */
430 /* Create the hash table used for demangled names. Each hash entry is
431 a pair of strings; one for the mangled name and one for the demangled
432 name. The entry is hashed via just the mangled name. */
435 create_demangled_names_hash (struct objfile *objfile)
437 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
438 The hash table code will round this up to the next prime number.
439 Choosing a much larger table size wastes memory, and saves only about
440 1% in symbol reading. */
442 objfile->demangled_names_hash = htab_create_alloc
443 (256, htab_hash_string, (int (*) (const void *, const void *)) streq,
444 NULL, xcalloc, xfree);
447 /* Try to determine the demangled name for a symbol, based on the
448 language of that symbol. If the language is set to language_auto,
449 it will attempt to find any demangling algorithm that works and
450 then set the language appropriately. The returned name is allocated
451 by the demangler and should be xfree'd. */
454 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
457 char *demangled = NULL;
459 if (gsymbol->language == language_unknown)
460 gsymbol->language = language_auto;
462 if (gsymbol->language == language_objc
463 || gsymbol->language == language_auto)
466 objc_demangle (mangled, 0);
467 if (demangled != NULL)
469 gsymbol->language = language_objc;
473 if (gsymbol->language == language_cplus
474 || gsymbol->language == language_auto)
477 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
478 if (demangled != NULL)
480 gsymbol->language = language_cplus;
484 if (gsymbol->language == language_java)
487 cplus_demangle (mangled,
488 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
489 if (demangled != NULL)
491 gsymbol->language = language_java;
498 /* Set both the mangled and demangled (if any) names for GSYMBOL based
499 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
500 is used, and the memory comes from that objfile's objfile_obstack.
501 LINKAGE_NAME is copied, so the pointer can be discarded after
502 calling this function. */
504 /* We have to be careful when dealing with Java names: when we run
505 into a Java minimal symbol, we don't know it's a Java symbol, so it
506 gets demangled as a C++ name. This is unfortunate, but there's not
507 much we can do about it: but when demangling partial symbols and
508 regular symbols, we'd better not reuse the wrong demangled name.
509 (See PR gdb/1039.) We solve this by putting a distinctive prefix
510 on Java names when storing them in the hash table. */
512 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
513 don't mind the Java prefix so much: different languages have
514 different demangling requirements, so it's only natural that we
515 need to keep language data around in our demangling cache. But
516 it's not good that the minimal symbol has the wrong demangled name.
517 Unfortunately, I can't think of any easy solution to that
520 #define JAVA_PREFIX "##JAVA$$"
521 #define JAVA_PREFIX_LEN 8
524 symbol_set_names (struct general_symbol_info *gsymbol,
525 const char *linkage_name, int len, struct objfile *objfile)
528 /* A 0-terminated copy of the linkage name. */
529 const char *linkage_name_copy;
530 /* A copy of the linkage name that might have a special Java prefix
531 added to it, for use when looking names up in the hash table. */
532 const char *lookup_name;
533 /* The length of lookup_name. */
536 if (objfile->demangled_names_hash == NULL)
537 create_demangled_names_hash (objfile);
539 if (gsymbol->language == language_ada)
541 /* In Ada, we do the symbol lookups using the mangled name, so
542 we can save some space by not storing the demangled name.
544 As a side note, we have also observed some overlap between
545 the C++ mangling and Ada mangling, similarly to what has
546 been observed with Java. Because we don't store the demangled
547 name with the symbol, we don't need to use the same trick
549 gsymbol->name = obstack_alloc (&objfile->objfile_obstack, len + 1);
550 memcpy (gsymbol->name, linkage_name, len);
551 gsymbol->name[len] = '\0';
552 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
557 /* The stabs reader generally provides names that are not
558 NUL-terminated; most of the other readers don't do this, so we
559 can just use the given copy, unless we're in the Java case. */
560 if (gsymbol->language == language_java)
563 lookup_len = len + JAVA_PREFIX_LEN;
565 alloc_name = alloca (lookup_len + 1);
566 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
567 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
568 alloc_name[lookup_len] = '\0';
570 lookup_name = alloc_name;
571 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
573 else if (linkage_name[len] != '\0')
578 alloc_name = alloca (lookup_len + 1);
579 memcpy (alloc_name, linkage_name, len);
580 alloc_name[lookup_len] = '\0';
582 lookup_name = alloc_name;
583 linkage_name_copy = alloc_name;
588 lookup_name = linkage_name;
589 linkage_name_copy = linkage_name;
592 slot = (char **) htab_find_slot (objfile->demangled_names_hash,
593 lookup_name, INSERT);
595 /* If this name is not in the hash table, add it. */
598 char *demangled_name = symbol_find_demangled_name (gsymbol,
600 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
602 /* If there is a demangled name, place it right after the mangled name.
603 Otherwise, just place a second zero byte after the end of the mangled
605 *slot = obstack_alloc (&objfile->objfile_obstack,
606 lookup_len + demangled_len + 2);
607 memcpy (*slot, lookup_name, lookup_len + 1);
608 if (demangled_name != NULL)
610 memcpy (*slot + lookup_len + 1, demangled_name, demangled_len + 1);
611 xfree (demangled_name);
614 (*slot)[lookup_len + 1] = '\0';
617 gsymbol->name = *slot + lookup_len - len;
618 if ((*slot)[lookup_len + 1] != '\0')
619 gsymbol->language_specific.cplus_specific.demangled_name
620 = &(*slot)[lookup_len + 1];
622 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
625 /* Return the source code name of a symbol. In languages where
626 demangling is necessary, this is the demangled name. */
629 symbol_natural_name (const struct general_symbol_info *gsymbol)
631 switch (gsymbol->language)
636 if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
637 return gsymbol->language_specific.cplus_specific.demangled_name;
640 if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
641 return gsymbol->language_specific.cplus_specific.demangled_name;
643 return ada_decode_symbol (gsymbol);
648 return gsymbol->name;
651 /* Return the demangled name for a symbol based on the language for
652 that symbol. If no demangled name exists, return NULL. */
654 symbol_demangled_name (struct general_symbol_info *gsymbol)
656 switch (gsymbol->language)
661 if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
662 return gsymbol->language_specific.cplus_specific.demangled_name;
665 if (gsymbol->language_specific.cplus_specific.demangled_name != NULL)
666 return gsymbol->language_specific.cplus_specific.demangled_name;
668 return ada_decode_symbol (gsymbol);
676 /* Return the search name of a symbol---generally the demangled or
677 linkage name of the symbol, depending on how it will be searched for.
678 If there is no distinct demangled name, then returns the same value
679 (same pointer) as SYMBOL_LINKAGE_NAME. */
681 symbol_search_name (const struct general_symbol_info *gsymbol)
683 if (gsymbol->language == language_ada)
684 return gsymbol->name;
686 return symbol_natural_name (gsymbol);
689 /* Initialize the structure fields to zero values. */
691 init_sal (struct symtab_and_line *sal)
698 sal->explicit_pc = 0;
699 sal->explicit_line = 0;
703 /* Return 1 if the two sections are the same, or if they could
704 plausibly be copies of each other, one in an original object
705 file and another in a separated debug file. */
708 matching_bfd_sections (asection *first, asection *second)
712 /* If they're the same section, then they match. */
716 /* If either is NULL, give up. */
717 if (first == NULL || second == NULL)
720 /* This doesn't apply to absolute symbols. */
721 if (first->owner == NULL || second->owner == NULL)
724 /* If they're in the same object file, they must be different sections. */
725 if (first->owner == second->owner)
728 /* Check whether the two sections are potentially corresponding. They must
729 have the same size, address, and name. We can't compare section indexes,
730 which would be more reliable, because some sections may have been
732 if (bfd_get_section_size (first) != bfd_get_section_size (second))
735 /* In-memory addresses may start at a different offset, relativize them. */
736 if (bfd_get_section_vma (first->owner, first)
737 - bfd_get_start_address (first->owner)
738 != bfd_get_section_vma (second->owner, second)
739 - bfd_get_start_address (second->owner))
742 if (bfd_get_section_name (first->owner, first) == NULL
743 || bfd_get_section_name (second->owner, second) == NULL
744 || strcmp (bfd_get_section_name (first->owner, first),
745 bfd_get_section_name (second->owner, second)) != 0)
748 /* Otherwise check that they are in corresponding objfiles. */
751 if (obj->obfd == first->owner)
753 gdb_assert (obj != NULL);
755 if (obj->separate_debug_objfile != NULL
756 && obj->separate_debug_objfile->obfd == second->owner)
758 if (obj->separate_debug_objfile_backlink != NULL
759 && obj->separate_debug_objfile_backlink->obfd == second->owner)
765 /* Find which partial symtab contains PC and SECTION starting at psymtab PST.
766 We may find a different psymtab than PST. See FIND_PC_SECT_PSYMTAB. */
768 struct partial_symtab *
769 find_pc_sect_psymtab_closer (CORE_ADDR pc, asection *section,
770 struct partial_symtab *pst,
771 struct minimal_symbol *msymbol)
773 struct objfile *objfile = pst->objfile;
774 struct partial_symtab *tpst;
775 struct partial_symtab *best_pst = pst;
776 CORE_ADDR best_addr = pst->textlow;
778 /* An objfile that has its functions reordered might have
779 many partial symbol tables containing the PC, but
780 we want the partial symbol table that contains the
781 function containing the PC. */
782 if (!(objfile->flags & OBJF_REORDERED) &&
783 section == 0) /* can't validate section this way */
789 /* The code range of partial symtabs sometimes overlap, so, in
790 the loop below, we need to check all partial symtabs and
791 find the one that fits better for the given PC address. We
792 select the partial symtab that contains a symbol whose
793 address is closest to the PC address. By closest we mean
794 that find_pc_sect_symbol returns the symbol with address
795 that is closest and still less than the given PC. */
796 for (tpst = pst; tpst != NULL; tpst = tpst->next)
798 if (pc >= tpst->textlow && pc < tpst->texthigh)
800 struct partial_symbol *p;
803 /* NOTE: This assumes that every psymbol has a
804 corresponding msymbol, which is not necessarily
805 true; the debug info might be much richer than the
806 object's symbol table. */
807 p = find_pc_sect_psymbol (tpst, pc, section);
809 && SYMBOL_VALUE_ADDRESS (p)
810 == SYMBOL_VALUE_ADDRESS (msymbol))
813 /* Also accept the textlow value of a psymtab as a
814 "symbol", to provide some support for partial
815 symbol tables with line information but no debug
816 symbols (e.g. those produced by an assembler). */
818 this_addr = SYMBOL_VALUE_ADDRESS (p);
820 this_addr = tpst->textlow;
822 /* Check whether it is closer than our current
823 BEST_ADDR. Since this symbol address is
824 necessarily lower or equal to PC, the symbol closer
825 to PC is the symbol which address is the highest.
826 This way we return the psymtab which contains such
827 best match symbol. This can help in cases where the
828 symbol information/debuginfo is not complete, like
829 for instance on IRIX6 with gcc, where no debug info
830 is emitted for statics. (See also the nodebug.exp
832 if (this_addr > best_addr)
834 best_addr = this_addr;
842 /* Find which partial symtab contains PC and SECTION. Return 0 if
843 none. We return the psymtab that contains a symbol whose address
844 exactly matches PC, or, if we cannot find an exact match, the
845 psymtab that contains a symbol whose address is closest to PC. */
846 struct partial_symtab *
847 find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
849 struct objfile *objfile;
850 struct minimal_symbol *msymbol;
852 /* If we know that this is not a text address, return failure. This is
853 necessary because we loop based on texthigh and textlow, which do
854 not include the data ranges. */
855 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
857 && (msymbol->type == mst_data
858 || msymbol->type == mst_bss
859 || msymbol->type == mst_abs
860 || msymbol->type == mst_file_data
861 || msymbol->type == mst_file_bss))
864 /* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
865 than the later used TEXTLOW/TEXTHIGH one. */
867 ALL_OBJFILES (objfile)
868 if (objfile->psymtabs_addrmap != NULL)
870 struct partial_symtab *pst;
872 pst = addrmap_find (objfile->psymtabs_addrmap, pc);
875 /* FIXME: addrmaps currently do not handle overlayed sections,
876 so fall back to the non-addrmap case if we're debugging
877 overlays and the addrmap returned the wrong section. */
878 if (overlay_debugging && msymbol && section)
880 struct partial_symbol *p;
881 /* NOTE: This assumes that every psymbol has a
882 corresponding msymbol, which is not necessarily
883 true; the debug info might be much richer than the
884 object's symbol table. */
885 p = find_pc_sect_psymbol (pst, pc, section);
887 || SYMBOL_VALUE_ADDRESS (p)
888 != SYMBOL_VALUE_ADDRESS (msymbol))
892 /* We do not try to call FIND_PC_SECT_PSYMTAB_CLOSER as
893 PSYMTABS_ADDRMAP we used has already the best 1-byte
894 granularity and FIND_PC_SECT_PSYMTAB_CLOSER may mislead us into
895 a worse chosen section due to the TEXTLOW/TEXTHIGH ranges
902 /* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
903 which still have no corresponding full SYMTABs read. But it is not
904 present for non-DWARF2 debug infos not supporting PSYMTABS_ADDRMAP in GDB
907 ALL_OBJFILES (objfile)
909 struct partial_symtab *pst;
911 /* Check even OBJFILE with non-zero PSYMTABS_ADDRMAP as only several of
912 its CUs may be missing in PSYMTABS_ADDRMAP as they may be varying
913 debug info type in single OBJFILE. */
915 ALL_OBJFILE_PSYMTABS (objfile, pst)
916 if (pc >= pst->textlow && pc < pst->texthigh)
918 struct partial_symtab *best_pst;
920 best_pst = find_pc_sect_psymtab_closer (pc, section, pst,
922 if (best_pst != NULL)
930 /* Find which partial symtab contains PC. Return 0 if none.
931 Backward compatibility, no section */
933 struct partial_symtab *
934 find_pc_psymtab (CORE_ADDR pc)
936 return find_pc_sect_psymtab (pc, find_pc_mapped_section (pc));
939 /* Find which partial symbol within a psymtab matches PC and SECTION.
940 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
942 struct partial_symbol *
943 find_pc_sect_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc,
946 struct partial_symbol *best = NULL, *p, **pp;
950 psymtab = find_pc_sect_psymtab (pc, section);
954 /* Cope with programs that start at address 0 */
955 best_pc = (psymtab->textlow != 0) ? psymtab->textlow - 1 : 0;
957 /* Search the global symbols as well as the static symbols, so that
958 find_pc_partial_function doesn't use a minimal symbol and thus
959 cache a bad endaddr. */
960 for (pp = psymtab->objfile->global_psymbols.list + psymtab->globals_offset;
961 (pp - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset)
962 < psymtab->n_global_syms);
966 if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
967 && SYMBOL_CLASS (p) == LOC_BLOCK
968 && pc >= SYMBOL_VALUE_ADDRESS (p)
969 && (SYMBOL_VALUE_ADDRESS (p) > best_pc
970 || (psymtab->textlow == 0
971 && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
973 if (section) /* match on a specific section */
975 fixup_psymbol_section (p, psymtab->objfile);
976 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p), section))
979 best_pc = SYMBOL_VALUE_ADDRESS (p);
984 for (pp = psymtab->objfile->static_psymbols.list + psymtab->statics_offset;
985 (pp - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset)
986 < psymtab->n_static_syms);
990 if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
991 && SYMBOL_CLASS (p) == LOC_BLOCK
992 && pc >= SYMBOL_VALUE_ADDRESS (p)
993 && (SYMBOL_VALUE_ADDRESS (p) > best_pc
994 || (psymtab->textlow == 0
995 && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
997 if (section) /* match on a specific section */
999 fixup_psymbol_section (p, psymtab->objfile);
1000 if (!matching_bfd_sections (SYMBOL_BFD_SECTION (p), section))
1003 best_pc = SYMBOL_VALUE_ADDRESS (p);
1011 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
1012 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
1014 struct partial_symbol *
1015 find_pc_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc)
1017 return find_pc_sect_psymbol (psymtab, pc, find_pc_mapped_section (pc));
1020 /* Debug symbols usually don't have section information. We need to dig that
1021 out of the minimal symbols and stash that in the debug symbol. */
1024 fixup_section (struct general_symbol_info *ginfo,
1025 CORE_ADDR addr, struct objfile *objfile)
1027 struct minimal_symbol *msym;
1029 /* First, check whether a minimal symbol with the same name exists
1030 and points to the same address. The address check is required
1031 e.g. on PowerPC64, where the minimal symbol for a function will
1032 point to the function descriptor, while the debug symbol will
1033 point to the actual function code. */
1034 msym = lookup_minimal_symbol_by_pc_name (addr, ginfo->name, objfile);
1037 ginfo->bfd_section = SYMBOL_BFD_SECTION (msym);
1038 ginfo->section = SYMBOL_SECTION (msym);
1042 /* Static, function-local variables do appear in the linker
1043 (minimal) symbols, but are frequently given names that won't
1044 be found via lookup_minimal_symbol(). E.g., it has been
1045 observed in frv-uclinux (ELF) executables that a static,
1046 function-local variable named "foo" might appear in the
1047 linker symbols as "foo.6" or "foo.3". Thus, there is no
1048 point in attempting to extend the lookup-by-name mechanism to
1049 handle this case due to the fact that there can be multiple
1052 So, instead, search the section table when lookup by name has
1053 failed. The ``addr'' and ``endaddr'' fields may have already
1054 been relocated. If so, the relocation offset (i.e. the
1055 ANOFFSET value) needs to be subtracted from these values when
1056 performing the comparison. We unconditionally subtract it,
1057 because, when no relocation has been performed, the ANOFFSET
1058 value will simply be zero.
1060 The address of the symbol whose section we're fixing up HAS
1061 NOT BEEN adjusted (relocated) yet. It can't have been since
1062 the section isn't yet known and knowing the section is
1063 necessary in order to add the correct relocation value. In
1064 other words, we wouldn't even be in this function (attempting
1065 to compute the section) if it were already known.
1067 Note that it is possible to search the minimal symbols
1068 (subtracting the relocation value if necessary) to find the
1069 matching minimal symbol, but this is overkill and much less
1070 efficient. It is not necessary to find the matching minimal
1071 symbol, only its section.
1073 Note that this technique (of doing a section table search)
1074 can fail when unrelocated section addresses overlap. For
1075 this reason, we still attempt a lookup by name prior to doing
1076 a search of the section table. */
1078 struct obj_section *s;
1079 ALL_OBJFILE_OSECTIONS (objfile, s)
1081 int idx = s->the_bfd_section->index;
1082 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
1084 if (s->addr - offset <= addr && addr < s->endaddr - offset)
1086 ginfo->bfd_section = s->the_bfd_section;
1087 ginfo->section = idx;
1095 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
1102 if (SYMBOL_BFD_SECTION (sym))
1105 /* We either have an OBJFILE, or we can get at it from the sym's
1106 symtab. Anything else is a bug. */
1107 gdb_assert (objfile || SYMBOL_SYMTAB (sym));
1109 if (objfile == NULL)
1110 objfile = SYMBOL_SYMTAB (sym)->objfile;
1112 /* We should have an objfile by now. */
1113 gdb_assert (objfile);
1115 switch (SYMBOL_CLASS (sym))
1119 addr = SYMBOL_VALUE_ADDRESS (sym);
1122 addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1126 /* Nothing else will be listed in the minsyms -- no use looking
1131 fixup_section (&sym->ginfo, addr, objfile);
1136 struct partial_symbol *
1137 fixup_psymbol_section (struct partial_symbol *psym, struct objfile *objfile)
1144 if (SYMBOL_BFD_SECTION (psym))
1147 gdb_assert (objfile);
1149 switch (SYMBOL_CLASS (psym))
1154 addr = SYMBOL_VALUE_ADDRESS (psym);
1157 /* Nothing else will be listed in the minsyms -- no use looking
1162 fixup_section (&psym->ginfo, addr, objfile);
1167 /* Find the definition for a specified symbol name NAME
1168 in domain DOMAIN, visible from lexical block BLOCK.
1169 Returns the struct symbol pointer, or zero if no symbol is found.
1170 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1171 NAME is a field of the current implied argument `this'. If so set
1172 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1173 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1174 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1176 /* This function has a bunch of loops in it and it would seem to be
1177 attractive to put in some QUIT's (though I'm not really sure
1178 whether it can run long enough to be really important). But there
1179 are a few calls for which it would appear to be bad news to quit
1180 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1181 that there is C++ code below which can error(), but that probably
1182 doesn't affect these calls since they are looking for a known
1183 variable and thus can probably assume it will never hit the C++
1187 lookup_symbol_in_language (const char *name, const struct block *block,
1188 const domain_enum domain, enum language lang,
1189 int *is_a_field_of_this)
1191 char *demangled_name = NULL;
1192 const char *modified_name = NULL;
1193 const char *mangled_name = NULL;
1194 int needtofreename = 0;
1195 struct symbol *returnval;
1197 modified_name = name;
1199 /* If we are using C++ or Java, demangle the name before doing a lookup, so
1200 we can always binary search. */
1201 if (lang == language_cplus)
1203 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1206 mangled_name = name;
1207 modified_name = demangled_name;
1211 else if (lang == language_java)
1213 demangled_name = cplus_demangle (name,
1214 DMGL_ANSI | DMGL_PARAMS | DMGL_JAVA);
1217 mangled_name = name;
1218 modified_name = demangled_name;
1223 if (case_sensitivity == case_sensitive_off)
1228 len = strlen (name);
1229 copy = (char *) alloca (len + 1);
1230 for (i= 0; i < len; i++)
1231 copy[i] = tolower (name[i]);
1233 modified_name = copy;
1236 returnval = lookup_symbol_aux (modified_name, mangled_name, block,
1237 domain, lang, is_a_field_of_this);
1239 xfree (demangled_name);
1244 /* Behave like lookup_symbol_in_language, but performed with the
1245 current language. */
1248 lookup_symbol (const char *name, const struct block *block,
1249 domain_enum domain, int *is_a_field_of_this)
1251 return lookup_symbol_in_language (name, block, domain,
1252 current_language->la_language,
1253 is_a_field_of_this);
1256 /* Behave like lookup_symbol except that NAME is the natural name
1257 of the symbol that we're looking for and, if LINKAGE_NAME is
1258 non-NULL, ensure that the symbol's linkage name matches as
1261 static struct symbol *
1262 lookup_symbol_aux (const char *name, const char *linkage_name,
1263 const struct block *block, const domain_enum domain,
1264 enum language language, int *is_a_field_of_this)
1267 const struct language_defn *langdef;
1269 /* Make sure we do something sensible with is_a_field_of_this, since
1270 the callers that set this parameter to some non-null value will
1271 certainly use it later and expect it to be either 0 or 1.
1272 If we don't set it, the contents of is_a_field_of_this are
1274 if (is_a_field_of_this != NULL)
1275 *is_a_field_of_this = 0;
1277 /* Search specified block and its superiors. Don't search
1278 STATIC_BLOCK or GLOBAL_BLOCK. */
1280 sym = lookup_symbol_aux_local (name, linkage_name, block, domain);
1284 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1285 check to see if NAME is a field of `this'. */
1287 langdef = language_def (language);
1289 if (langdef->la_name_of_this != NULL && is_a_field_of_this != NULL
1292 struct symbol *sym = NULL;
1293 /* 'this' is only defined in the function's block, so find the
1294 enclosing function block. */
1295 for (; block && !BLOCK_FUNCTION (block);
1296 block = BLOCK_SUPERBLOCK (block));
1298 if (block && !dict_empty (BLOCK_DICT (block)))
1299 sym = lookup_block_symbol (block, langdef->la_name_of_this,
1303 struct type *t = sym->type;
1305 /* I'm not really sure that type of this can ever
1306 be typedefed; just be safe. */
1308 if (TYPE_CODE (t) == TYPE_CODE_PTR
1309 || TYPE_CODE (t) == TYPE_CODE_REF)
1310 t = TYPE_TARGET_TYPE (t);
1312 if (TYPE_CODE (t) != TYPE_CODE_STRUCT
1313 && TYPE_CODE (t) != TYPE_CODE_UNION)
1314 error (_("Internal error: `%s' is not an aggregate"),
1315 langdef->la_name_of_this);
1317 if (check_field (t, name))
1319 *is_a_field_of_this = 1;
1325 /* Now do whatever is appropriate for LANGUAGE to look
1326 up static and global variables. */
1328 sym = langdef->la_lookup_symbol_nonlocal (name, linkage_name, block, domain);
1332 /* Now search all static file-level symbols. Not strictly correct,
1333 but more useful than an error. Do the symtabs first, then check
1334 the psymtabs. If a psymtab indicates the existence of the
1335 desired name as a file-level static, then do psymtab-to-symtab
1336 conversion on the fly and return the found symbol. */
1338 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, linkage_name, domain);
1342 sym = lookup_symbol_aux_psymtabs (STATIC_BLOCK, name, linkage_name, domain);
1349 /* Check to see if the symbol is defined in BLOCK or its superiors.
1350 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1352 static struct symbol *
1353 lookup_symbol_aux_local (const char *name, const char *linkage_name,
1354 const struct block *block,
1355 const domain_enum domain)
1358 const struct block *static_block = block_static_block (block);
1360 /* Check if either no block is specified or it's a global block. */
1362 if (static_block == NULL)
1365 while (block != static_block)
1367 sym = lookup_symbol_aux_block (name, linkage_name, block, domain);
1370 block = BLOCK_SUPERBLOCK (block);
1373 /* We've reached the static block without finding a result. */
1378 /* Look up OBJFILE to BLOCK. */
1380 static struct objfile *
1381 lookup_objfile_from_block (const struct block *block)
1383 struct objfile *obj;
1389 block = block_global_block (block);
1390 /* Go through SYMTABS. */
1391 ALL_SYMTABS (obj, s)
1392 if (block == BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK))
1398 /* Look up a symbol in a block; if found, fixup the symbol, and set
1399 block_found appropriately. */
1402 lookup_symbol_aux_block (const char *name, const char *linkage_name,
1403 const struct block *block,
1404 const domain_enum domain)
1408 sym = lookup_block_symbol (block, name, linkage_name, domain);
1411 block_found = block;
1412 return fixup_symbol_section (sym, NULL);
1418 /* Check all global symbols in OBJFILE in symtabs and
1422 lookup_global_symbol_from_objfile (const struct objfile *objfile,
1424 const char *linkage_name,
1425 const domain_enum domain)
1428 struct blockvector *bv;
1429 const struct block *block;
1431 struct partial_symtab *ps;
1433 /* Go through symtabs. */
1434 ALL_OBJFILE_SYMTABS (objfile, s)
1436 bv = BLOCKVECTOR (s);
1437 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1438 sym = lookup_block_symbol (block, name, linkage_name, domain);
1441 block_found = block;
1442 return fixup_symbol_section (sym, (struct objfile *)objfile);
1446 /* Now go through psymtabs. */
1447 ALL_OBJFILE_PSYMTABS (objfile, ps)
1450 && lookup_partial_symbol (ps, name, linkage_name,
1453 s = PSYMTAB_TO_SYMTAB (ps);
1454 bv = BLOCKVECTOR (s);
1455 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1456 sym = lookup_block_symbol (block, name, linkage_name, domain);
1457 return fixup_symbol_section (sym, (struct objfile *)objfile);
1461 if (objfile->separate_debug_objfile)
1462 return lookup_global_symbol_from_objfile (objfile->separate_debug_objfile,
1463 name, linkage_name, domain);
1468 /* Check to see if the symbol is defined in one of the symtabs.
1469 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1470 depending on whether or not we want to search global symbols or
1473 static struct symbol *
1474 lookup_symbol_aux_symtabs (int block_index,
1475 const char *name, const char *linkage_name,
1476 const domain_enum domain)
1479 struct objfile *objfile;
1480 struct blockvector *bv;
1481 const struct block *block;
1484 ALL_PRIMARY_SYMTABS (objfile, s)
1486 bv = BLOCKVECTOR (s);
1487 block = BLOCKVECTOR_BLOCK (bv, block_index);
1488 sym = lookup_block_symbol (block, name, linkage_name, domain);
1491 block_found = block;
1492 return fixup_symbol_section (sym, objfile);
1499 /* Check to see if the symbol is defined in one of the partial
1500 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1501 STATIC_BLOCK, depending on whether or not we want to search global
1502 symbols or static symbols. */
1504 static struct symbol *
1505 lookup_symbol_aux_psymtabs (int block_index, const char *name,
1506 const char *linkage_name,
1507 const domain_enum domain)
1510 struct objfile *objfile;
1511 struct blockvector *bv;
1512 const struct block *block;
1513 struct partial_symtab *ps;
1515 const int psymtab_index = (block_index == GLOBAL_BLOCK ? 1 : 0);
1517 ALL_PSYMTABS (objfile, ps)
1520 && lookup_partial_symbol (ps, name, linkage_name,
1521 psymtab_index, domain))
1523 s = PSYMTAB_TO_SYMTAB (ps);
1524 bv = BLOCKVECTOR (s);
1525 block = BLOCKVECTOR_BLOCK (bv, block_index);
1526 sym = lookup_block_symbol (block, name, linkage_name, domain);
1529 /* This shouldn't be necessary, but as a last resort try
1530 looking in the statics even though the psymtab claimed
1531 the symbol was global, or vice-versa. It's possible
1532 that the psymtab gets it wrong in some cases. */
1534 /* FIXME: carlton/2002-09-30: Should we really do that?
1535 If that happens, isn't it likely to be a GDB error, in
1536 which case we should fix the GDB error rather than
1537 silently dealing with it here? So I'd vote for
1538 removing the check for the symbol in the other
1540 block = BLOCKVECTOR_BLOCK (bv,
1541 block_index == GLOBAL_BLOCK ?
1542 STATIC_BLOCK : GLOBAL_BLOCK);
1543 sym = lookup_block_symbol (block, name, linkage_name, domain);
1545 error (_("Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n%s may be an inlined function, or may be a template function\n(if a template, try specifying an instantiation: %s<type>)."),
1546 block_index == GLOBAL_BLOCK ? "global" : "static",
1547 name, ps->filename, name, name);
1549 return fixup_symbol_section (sym, objfile);
1556 /* A default version of lookup_symbol_nonlocal for use by languages
1557 that can't think of anything better to do. This implements the C
1561 basic_lookup_symbol_nonlocal (const char *name,
1562 const char *linkage_name,
1563 const struct block *block,
1564 const domain_enum domain)
1568 /* NOTE: carlton/2003-05-19: The comments below were written when
1569 this (or what turned into this) was part of lookup_symbol_aux;
1570 I'm much less worried about these questions now, since these
1571 decisions have turned out well, but I leave these comments here
1574 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1575 not it would be appropriate to search the current global block
1576 here as well. (That's what this code used to do before the
1577 is_a_field_of_this check was moved up.) On the one hand, it's
1578 redundant with the lookup_symbol_aux_symtabs search that happens
1579 next. On the other hand, if decode_line_1 is passed an argument
1580 like filename:var, then the user presumably wants 'var' to be
1581 searched for in filename. On the third hand, there shouldn't be
1582 multiple global variables all of which are named 'var', and it's
1583 not like decode_line_1 has ever restricted its search to only
1584 global variables in a single filename. All in all, only
1585 searching the static block here seems best: it's correct and it's
1588 /* NOTE: carlton/2002-12-05: There's also a possible performance
1589 issue here: if you usually search for global symbols in the
1590 current file, then it would be slightly better to search the
1591 current global block before searching all the symtabs. But there
1592 are other factors that have a much greater effect on performance
1593 than that one, so I don't think we should worry about that for
1596 sym = lookup_symbol_static (name, linkage_name, block, domain);
1600 return lookup_symbol_global (name, linkage_name, block, domain);
1603 /* Lookup a symbol in the static block associated to BLOCK, if there
1604 is one; do nothing if BLOCK is NULL or a global block. */
1607 lookup_symbol_static (const char *name,
1608 const char *linkage_name,
1609 const struct block *block,
1610 const domain_enum domain)
1612 const struct block *static_block = block_static_block (block);
1614 if (static_block != NULL)
1615 return lookup_symbol_aux_block (name, linkage_name, static_block, domain);
1620 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1624 lookup_symbol_global (const char *name,
1625 const char *linkage_name,
1626 const struct block *block,
1627 const domain_enum domain)
1629 struct symbol *sym = NULL;
1630 struct objfile *objfile = NULL;
1632 /* Call library-specific lookup procedure. */
1633 objfile = lookup_objfile_from_block (block);
1634 if (objfile != NULL)
1635 sym = solib_global_lookup (objfile, name, linkage_name, domain);
1639 sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name, domain);
1643 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name, domain);
1647 symbol_matches_domain (enum language symbol_language,
1648 domain_enum symbol_domain,
1651 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1652 A Java class declaration also defines a typedef for the class.
1653 Similarly, any Ada type declaration implicitly defines a typedef. */
1654 if (symbol_language == language_cplus
1655 || symbol_language == language_java
1656 || symbol_language == language_ada)
1658 if ((domain == VAR_DOMAIN || domain == STRUCT_DOMAIN)
1659 && symbol_domain == STRUCT_DOMAIN)
1662 /* For all other languages, strict match is required. */
1663 return (symbol_domain == domain);
1666 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1667 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1668 linkage name matches it. Check the global symbols if GLOBAL, the
1669 static symbols if not */
1671 struct partial_symbol *
1672 lookup_partial_symbol (struct partial_symtab *pst, const char *name,
1673 const char *linkage_name, int global,
1676 struct partial_symbol *temp;
1677 struct partial_symbol **start, **psym;
1678 struct partial_symbol **top, **real_top, **bottom, **center;
1679 int length = (global ? pst->n_global_syms : pst->n_static_syms);
1680 int do_linear_search = 1;
1687 pst->objfile->global_psymbols.list + pst->globals_offset :
1688 pst->objfile->static_psymbols.list + pst->statics_offset);
1690 if (global) /* This means we can use a binary search. */
1692 do_linear_search = 0;
1694 /* Binary search. This search is guaranteed to end with center
1695 pointing at the earliest partial symbol whose name might be
1696 correct. At that point *all* partial symbols with an
1697 appropriate name will be checked against the correct
1701 top = start + length - 1;
1703 while (top > bottom)
1705 center = bottom + (top - bottom) / 2;
1706 if (!(center < top))
1707 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
1708 if (!do_linear_search
1709 && (SYMBOL_LANGUAGE (*center) == language_java))
1711 do_linear_search = 1;
1713 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center), name) >= 0)
1719 bottom = center + 1;
1722 if (!(top == bottom))
1723 internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
1725 while (top <= real_top
1726 && (linkage_name != NULL
1727 ? strcmp (SYMBOL_LINKAGE_NAME (*top), linkage_name) == 0
1728 : SYMBOL_MATCHES_SEARCH_NAME (*top,name)))
1730 if (symbol_matches_domain (SYMBOL_LANGUAGE (*top),
1731 SYMBOL_DOMAIN (*top), domain))
1737 /* Can't use a binary search or else we found during the binary search that
1738 we should also do a linear search. */
1740 if (do_linear_search)
1742 for (psym = start; psym < start + length; psym++)
1744 if (symbol_matches_domain (SYMBOL_LANGUAGE (*psym),
1745 SYMBOL_DOMAIN (*psym), domain))
1747 if (linkage_name != NULL
1748 ? strcmp (SYMBOL_LINKAGE_NAME (*psym), linkage_name) == 0
1749 : SYMBOL_MATCHES_SEARCH_NAME (*psym, name))
1760 /* Look up a type named NAME in the struct_domain. The type returned
1761 must not be opaque -- i.e., must have at least one field
1765 lookup_transparent_type (const char *name)
1767 return current_language->la_lookup_transparent_type (name);
1770 /* The standard implementation of lookup_transparent_type. This code
1771 was modeled on lookup_symbol -- the parts not relevant to looking
1772 up types were just left out. In particular it's assumed here that
1773 types are available in struct_domain and only at file-static or
1777 basic_lookup_transparent_type (const char *name)
1780 struct symtab *s = NULL;
1781 struct partial_symtab *ps;
1782 struct blockvector *bv;
1783 struct objfile *objfile;
1784 struct block *block;
1786 /* Now search all the global symbols. Do the symtab's first, then
1787 check the psymtab's. If a psymtab indicates the existence
1788 of the desired name as a global, then do psymtab-to-symtab
1789 conversion on the fly and return the found symbol. */
1791 ALL_PRIMARY_SYMTABS (objfile, s)
1793 bv = BLOCKVECTOR (s);
1794 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1795 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1796 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1798 return SYMBOL_TYPE (sym);
1802 ALL_PSYMTABS (objfile, ps)
1804 if (!ps->readin && lookup_partial_symbol (ps, name, NULL,
1807 s = PSYMTAB_TO_SYMTAB (ps);
1808 bv = BLOCKVECTOR (s);
1809 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1810 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1813 /* This shouldn't be necessary, but as a last resort
1814 * try looking in the statics even though the psymtab
1815 * claimed the symbol was global. It's possible that
1816 * the psymtab gets it wrong in some cases.
1818 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1819 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1821 error (_("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1822 %s may be an inlined function, or may be a template function\n\
1823 (if a template, try specifying an instantiation: %s<type>)."),
1824 name, ps->filename, name, name);
1826 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1827 return SYMBOL_TYPE (sym);
1831 /* Now search the static file-level symbols.
1832 Not strictly correct, but more useful than an error.
1833 Do the symtab's first, then
1834 check the psymtab's. If a psymtab indicates the existence
1835 of the desired name as a file-level static, then do psymtab-to-symtab
1836 conversion on the fly and return the found symbol.
1839 ALL_PRIMARY_SYMTABS (objfile, s)
1841 bv = BLOCKVECTOR (s);
1842 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1843 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1844 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1846 return SYMBOL_TYPE (sym);
1850 ALL_PSYMTABS (objfile, ps)
1852 if (!ps->readin && lookup_partial_symbol (ps, name, NULL, 0, STRUCT_DOMAIN))
1854 s = PSYMTAB_TO_SYMTAB (ps);
1855 bv = BLOCKVECTOR (s);
1856 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1857 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1860 /* This shouldn't be necessary, but as a last resort
1861 * try looking in the globals even though the psymtab
1862 * claimed the symbol was static. It's possible that
1863 * the psymtab gets it wrong in some cases.
1865 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1866 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1868 error (_("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1869 %s may be an inlined function, or may be a template function\n\
1870 (if a template, try specifying an instantiation: %s<type>)."),
1871 name, ps->filename, name, name);
1873 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1874 return SYMBOL_TYPE (sym);
1877 return (struct type *) 0;
1881 /* Find the psymtab containing main(). */
1882 /* FIXME: What about languages without main() or specially linked
1883 executables that have no main() ? */
1885 struct partial_symtab *
1886 find_main_psymtab (void)
1888 struct partial_symtab *pst;
1889 struct objfile *objfile;
1891 ALL_PSYMTABS (objfile, pst)
1893 if (lookup_partial_symbol (pst, main_name (), NULL, 1, VAR_DOMAIN))
1901 /* Search BLOCK for symbol NAME in DOMAIN.
1903 Note that if NAME is the demangled form of a C++ symbol, we will fail
1904 to find a match during the binary search of the non-encoded names, but
1905 for now we don't worry about the slight inefficiency of looking for
1906 a match we'll never find, since it will go pretty quick. Once the
1907 binary search terminates, we drop through and do a straight linear
1908 search on the symbols. Each symbol which is marked as being a ObjC/C++
1909 symbol (language_cplus or language_objc set) has both the encoded and
1910 non-encoded names tested for a match.
1912 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1913 particular mangled name.
1917 lookup_block_symbol (const struct block *block, const char *name,
1918 const char *linkage_name,
1919 const domain_enum domain)
1921 struct dict_iterator iter;
1924 if (!BLOCK_FUNCTION (block))
1926 for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter);
1928 sym = dict_iter_name_next (name, &iter))
1930 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1931 SYMBOL_DOMAIN (sym), domain)
1932 && (linkage_name != NULL
1933 ? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1))
1940 /* Note that parameter symbols do not always show up last in the
1941 list; this loop makes sure to take anything else other than
1942 parameter symbols first; it only uses parameter symbols as a
1943 last resort. Note that this only takes up extra computation
1946 struct symbol *sym_found = NULL;
1948 for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter);
1950 sym = dict_iter_name_next (name, &iter))
1952 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym),
1953 SYMBOL_DOMAIN (sym), domain)
1954 && (linkage_name != NULL
1955 ? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1))
1958 if (!SYMBOL_IS_ARGUMENT (sym))
1964 return (sym_found); /* Will be NULL if not found. */
1968 /* Find the symtab associated with PC and SECTION. Look through the
1969 psymtabs and read in another symtab if necessary. */
1972 find_pc_sect_symtab (CORE_ADDR pc, asection *section)
1975 struct blockvector *bv;
1976 struct symtab *s = NULL;
1977 struct symtab *best_s = NULL;
1978 struct partial_symtab *ps;
1979 struct objfile *objfile;
1980 CORE_ADDR distance = 0;
1981 struct minimal_symbol *msymbol;
1983 /* If we know that this is not a text address, return failure. This is
1984 necessary because we loop based on the block's high and low code
1985 addresses, which do not include the data ranges, and because
1986 we call find_pc_sect_psymtab which has a similar restriction based
1987 on the partial_symtab's texthigh and textlow. */
1988 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
1990 && (msymbol->type == mst_data
1991 || msymbol->type == mst_bss
1992 || msymbol->type == mst_abs
1993 || msymbol->type == mst_file_data
1994 || msymbol->type == mst_file_bss))
1997 /* Search all symtabs for the one whose file contains our address, and which
1998 is the smallest of all the ones containing the address. This is designed
1999 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2000 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2001 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2003 This happens for native ecoff format, where code from included files
2004 gets its own symtab. The symtab for the included file should have
2005 been read in already via the dependency mechanism.
2006 It might be swifter to create several symtabs with the same name
2007 like xcoff does (I'm not sure).
2009 It also happens for objfiles that have their functions reordered.
2010 For these, the symtab we are looking for is not necessarily read in. */
2012 ALL_PRIMARY_SYMTABS (objfile, s)
2014 bv = BLOCKVECTOR (s);
2015 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
2017 if (BLOCK_START (b) <= pc
2018 && BLOCK_END (b) > pc
2020 || BLOCK_END (b) - BLOCK_START (b) < distance))
2022 /* For an objfile that has its functions reordered,
2023 find_pc_psymtab will find the proper partial symbol table
2024 and we simply return its corresponding symtab. */
2025 /* In order to better support objfiles that contain both
2026 stabs and coff debugging info, we continue on if a psymtab
2028 if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs)
2030 ps = find_pc_sect_psymtab (pc, section);
2032 return PSYMTAB_TO_SYMTAB (ps);
2036 struct dict_iterator iter;
2037 struct symbol *sym = NULL;
2039 ALL_BLOCK_SYMBOLS (b, iter, sym)
2041 fixup_symbol_section (sym, objfile);
2042 if (matching_bfd_sections (SYMBOL_BFD_SECTION (sym), section))
2046 continue; /* no symbol in this symtab matches section */
2048 distance = BLOCK_END (b) - BLOCK_START (b);
2057 ps = find_pc_sect_psymtab (pc, section);
2061 /* Might want to error() here (in case symtab is corrupt and
2062 will cause a core dump), but maybe we can successfully
2063 continue, so let's not. */
2065 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n"),
2067 s = PSYMTAB_TO_SYMTAB (ps);
2072 /* Find the symtab associated with PC. Look through the psymtabs and
2073 read in another symtab if necessary. Backward compatibility, no section */
2076 find_pc_symtab (CORE_ADDR pc)
2078 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
2082 /* Find the source file and line number for a given PC value and SECTION.
2083 Return a structure containing a symtab pointer, a line number,
2084 and a pc range for the entire source line.
2085 The value's .pc field is NOT the specified pc.
2086 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2087 use the line that ends there. Otherwise, in that case, the line
2088 that begins there is used. */
2090 /* The big complication here is that a line may start in one file, and end just
2091 before the start of another file. This usually occurs when you #include
2092 code in the middle of a subroutine. To properly find the end of a line's PC
2093 range, we must search all symtabs associated with this compilation unit, and
2094 find the one whose first PC is closer than that of the next line in this
2097 /* If it's worth the effort, we could be using a binary search. */
2099 struct symtab_and_line
2100 find_pc_sect_line (CORE_ADDR pc, struct bfd_section *section, int notcurrent)
2103 struct linetable *l;
2106 struct linetable_entry *item;
2107 struct symtab_and_line val;
2108 struct blockvector *bv;
2109 struct minimal_symbol *msymbol;
2110 struct minimal_symbol *mfunsym;
2112 /* Info on best line seen so far, and where it starts, and its file. */
2114 struct linetable_entry *best = NULL;
2115 CORE_ADDR best_end = 0;
2116 struct symtab *best_symtab = 0;
2118 /* Store here the first line number
2119 of a file which contains the line at the smallest pc after PC.
2120 If we don't find a line whose range contains PC,
2121 we will use a line one less than this,
2122 with a range from the start of that file to the first line's pc. */
2123 struct linetable_entry *alt = NULL;
2124 struct symtab *alt_symtab = 0;
2126 /* Info on best line seen in this file. */
2128 struct linetable_entry *prev;
2130 /* If this pc is not from the current frame,
2131 it is the address of the end of a call instruction.
2132 Quite likely that is the start of the following statement.
2133 But what we want is the statement containing the instruction.
2134 Fudge the pc to make sure we get that. */
2136 init_sal (&val); /* initialize to zeroes */
2138 /* It's tempting to assume that, if we can't find debugging info for
2139 any function enclosing PC, that we shouldn't search for line
2140 number info, either. However, GAS can emit line number info for
2141 assembly files --- very helpful when debugging hand-written
2142 assembly code. In such a case, we'd have no debug info for the
2143 function, but we would have line info. */
2148 /* elz: added this because this function returned the wrong
2149 information if the pc belongs to a stub (import/export)
2150 to call a shlib function. This stub would be anywhere between
2151 two functions in the target, and the line info was erroneously
2152 taken to be the one of the line before the pc.
2154 /* RT: Further explanation:
2156 * We have stubs (trampolines) inserted between procedures.
2158 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2159 * exists in the main image.
2161 * In the minimal symbol table, we have a bunch of symbols
2162 * sorted by start address. The stubs are marked as "trampoline",
2163 * the others appear as text. E.g.:
2165 * Minimal symbol table for main image
2166 * main: code for main (text symbol)
2167 * shr1: stub (trampoline symbol)
2168 * foo: code for foo (text symbol)
2170 * Minimal symbol table for "shr1" image:
2172 * shr1: code for shr1 (text symbol)
2175 * So the code below is trying to detect if we are in the stub
2176 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2177 * and if found, do the symbolization from the real-code address
2178 * rather than the stub address.
2180 * Assumptions being made about the minimal symbol table:
2181 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2182 * if we're really in the trampoline. If we're beyond it (say
2183 * we're in "foo" in the above example), it'll have a closer
2184 * symbol (the "foo" text symbol for example) and will not
2185 * return the trampoline.
2186 * 2. lookup_minimal_symbol_text() will find a real text symbol
2187 * corresponding to the trampoline, and whose address will
2188 * be different than the trampoline address. I put in a sanity
2189 * check for the address being the same, to avoid an
2190 * infinite recursion.
2192 msymbol = lookup_minimal_symbol_by_pc (pc);
2193 if (msymbol != NULL)
2194 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2196 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2198 if (mfunsym == NULL)
2199 /* I eliminated this warning since it is coming out
2200 * in the following situation:
2201 * gdb shmain // test program with shared libraries
2202 * (gdb) break shr1 // function in shared lib
2203 * Warning: In stub for ...
2204 * In the above situation, the shared lib is not loaded yet,
2205 * so of course we can't find the real func/line info,
2206 * but the "break" still works, and the warning is annoying.
2207 * So I commented out the warning. RT */
2208 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2210 else if (SYMBOL_VALUE_ADDRESS (mfunsym) == SYMBOL_VALUE_ADDRESS (msymbol))
2211 /* Avoid infinite recursion */
2212 /* See above comment about why warning is commented out */
2213 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2216 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym), 0);
2220 s = find_pc_sect_symtab (pc, section);
2223 /* if no symbol information, return previous pc */
2230 bv = BLOCKVECTOR (s);
2232 /* Look at all the symtabs that share this blockvector.
2233 They all have the same apriori range, that we found was right;
2234 but they have different line tables. */
2236 for (; s && BLOCKVECTOR (s) == bv; s = s->next)
2238 /* Find the best line in this symtab. */
2245 /* I think len can be zero if the symtab lacks line numbers
2246 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2247 I'm not sure which, and maybe it depends on the symbol
2253 item = l->item; /* Get first line info */
2255 /* Is this file's first line closer than the first lines of other files?
2256 If so, record this file, and its first line, as best alternate. */
2257 if (item->pc > pc && (!alt || item->pc < alt->pc))
2263 for (i = 0; i < len; i++, item++)
2265 /* Leave prev pointing to the linetable entry for the last line
2266 that started at or before PC. */
2273 /* At this point, prev points at the line whose start addr is <= pc, and
2274 item points at the next line. If we ran off the end of the linetable
2275 (pc >= start of the last line), then prev == item. If pc < start of
2276 the first line, prev will not be set. */
2278 /* Is this file's best line closer than the best in the other files?
2279 If so, record this file, and its best line, as best so far. Don't
2280 save prev if it represents the end of a function (i.e. line number
2281 0) instead of a real line. */
2283 if (prev && prev->line && (!best || prev->pc > best->pc))
2288 /* Discard BEST_END if it's before the PC of the current BEST. */
2289 if (best_end <= best->pc)
2293 /* If another line (denoted by ITEM) is in the linetable and its
2294 PC is after BEST's PC, but before the current BEST_END, then
2295 use ITEM's PC as the new best_end. */
2296 if (best && i < len && item->pc > best->pc
2297 && (best_end == 0 || best_end > item->pc))
2298 best_end = item->pc;
2303 /* If we didn't find any line number info, just return zeros.
2304 We used to return alt->line - 1 here, but that could be
2305 anywhere; if we don't have line number info for this PC,
2306 don't make some up. */
2309 else if (best->line == 0)
2311 /* If our best fit is in a range of PC's for which no line
2312 number info is available (line number is zero) then we didn't
2313 find any valid line information. */
2318 val.symtab = best_symtab;
2319 val.line = best->line;
2321 if (best_end && (!alt || best_end < alt->pc))
2326 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2328 val.section = section;
2332 /* Backward compatibility (no section) */
2334 struct symtab_and_line
2335 find_pc_line (CORE_ADDR pc, int notcurrent)
2339 section = find_pc_overlay (pc);
2340 if (pc_in_unmapped_range (pc, section))
2341 pc = overlay_mapped_address (pc, section);
2342 return find_pc_sect_line (pc, section, notcurrent);
2345 /* Find line number LINE in any symtab whose name is the same as
2348 If found, return the symtab that contains the linetable in which it was
2349 found, set *INDEX to the index in the linetable of the best entry
2350 found, and set *EXACT_MATCH nonzero if the value returned is an
2353 If not found, return NULL. */
2356 find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match)
2360 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2364 struct linetable *best_linetable;
2365 struct symtab *best_symtab;
2367 /* First try looking it up in the given symtab. */
2368 best_linetable = LINETABLE (symtab);
2369 best_symtab = symtab;
2370 best_index = find_line_common (best_linetable, line, &exact);
2371 if (best_index < 0 || !exact)
2373 /* Didn't find an exact match. So we better keep looking for
2374 another symtab with the same name. In the case of xcoff,
2375 multiple csects for one source file (produced by IBM's FORTRAN
2376 compiler) produce multiple symtabs (this is unavoidable
2377 assuming csects can be at arbitrary places in memory and that
2378 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2380 /* BEST is the smallest linenumber > LINE so far seen,
2381 or 0 if none has been seen so far.
2382 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2385 struct objfile *objfile;
2387 struct partial_symtab *p;
2389 if (best_index >= 0)
2390 best = best_linetable->item[best_index].line;
2394 ALL_PSYMTABS (objfile, p)
2396 if (strcmp (symtab->filename, p->filename) != 0)
2398 PSYMTAB_TO_SYMTAB (p);
2401 ALL_SYMTABS (objfile, s)
2403 struct linetable *l;
2406 if (strcmp (symtab->filename, s->filename) != 0)
2409 ind = find_line_common (l, line, &exact);
2419 if (best == 0 || l->item[ind].line < best)
2421 best = l->item[ind].line;
2434 *index = best_index;
2436 *exact_match = exact;
2441 /* Set the PC value for a given source file and line number and return true.
2442 Returns zero for invalid line number (and sets the PC to 0).
2443 The source file is specified with a struct symtab. */
2446 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2448 struct linetable *l;
2455 symtab = find_line_symtab (symtab, line, &ind, NULL);
2458 l = LINETABLE (symtab);
2459 *pc = l->item[ind].pc;
2466 /* Find the range of pc values in a line.
2467 Store the starting pc of the line into *STARTPTR
2468 and the ending pc (start of next line) into *ENDPTR.
2469 Returns 1 to indicate success.
2470 Returns 0 if could not find the specified line. */
2473 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2476 CORE_ADDR startaddr;
2477 struct symtab_and_line found_sal;
2480 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2483 /* This whole function is based on address. For example, if line 10 has
2484 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2485 "info line *0x123" should say the line goes from 0x100 to 0x200
2486 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2487 This also insures that we never give a range like "starts at 0x134
2488 and ends at 0x12c". */
2490 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2491 if (found_sal.line != sal.line)
2493 /* The specified line (sal) has zero bytes. */
2494 *startptr = found_sal.pc;
2495 *endptr = found_sal.pc;
2499 *startptr = found_sal.pc;
2500 *endptr = found_sal.end;
2505 /* Given a line table and a line number, return the index into the line
2506 table for the pc of the nearest line whose number is >= the specified one.
2507 Return -1 if none is found. The value is >= 0 if it is an index.
2509 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2512 find_line_common (struct linetable *l, int lineno,
2518 /* BEST is the smallest linenumber > LINENO so far seen,
2519 or 0 if none has been seen so far.
2520 BEST_INDEX identifies the item for it. */
2522 int best_index = -1;
2533 for (i = 0; i < len; i++)
2535 struct linetable_entry *item = &(l->item[i]);
2537 if (item->line == lineno)
2539 /* Return the first (lowest address) entry which matches. */
2544 if (item->line > lineno && (best == 0 || item->line < best))
2551 /* If we got here, we didn't get an exact match. */
2556 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2558 struct symtab_and_line sal;
2559 sal = find_pc_line (pc, 0);
2562 return sal.symtab != 0;
2565 /* Given a function start address PC and SECTION, find the first
2566 address after the function prologue. */
2568 find_function_start_pc (struct gdbarch *gdbarch,
2569 CORE_ADDR pc, asection *section)
2571 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2572 so that gdbarch_skip_prologue has something unique to work on. */
2573 if (section_is_overlay (section) && !section_is_mapped (section))
2574 pc = overlay_unmapped_address (pc, section);
2576 pc += gdbarch_deprecated_function_start_offset (gdbarch);
2577 pc = gdbarch_skip_prologue (gdbarch, pc);
2579 /* For overlays, map pc back into its mapped VMA range. */
2580 pc = overlay_mapped_address (pc, section);
2585 /* Given a function symbol SYM, find the symtab and line for the start
2587 If the argument FUNFIRSTLINE is nonzero, we want the first line
2588 of real code inside the function. */
2590 struct symtab_and_line
2591 find_function_start_sal (struct symbol *sym, int funfirstline)
2593 struct block *block = SYMBOL_BLOCK_VALUE (sym);
2594 struct objfile *objfile = lookup_objfile_from_block (block);
2595 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2598 struct symtab_and_line sal;
2600 pc = BLOCK_START (block);
2601 fixup_symbol_section (sym, objfile);
2604 /* Skip "first line" of function (which is actually its prologue). */
2605 pc = find_function_start_pc (gdbarch, pc, SYMBOL_BFD_SECTION (sym));
2607 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2609 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2610 line is still part of the same function. */
2612 && BLOCK_START (block) <= sal.end
2613 && sal.end < BLOCK_END (block))
2615 /* First pc of next line */
2617 /* Recalculate the line number (might not be N+1). */
2618 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2621 /* On targets with executable formats that don't have a concept of
2622 constructors (ELF with .init has, PE doesn't), gcc emits a call
2623 to `__main' in `main' between the prologue and before user
2626 && gdbarch_skip_main_prologue_p (current_gdbarch)
2627 && SYMBOL_LINKAGE_NAME (sym)
2628 && strcmp (SYMBOL_LINKAGE_NAME (sym), "main") == 0)
2630 pc = gdbarch_skip_main_prologue (current_gdbarch, pc);
2631 /* Recalculate the line number (might not be N+1). */
2632 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2640 /* If P is of the form "operator[ \t]+..." where `...' is
2641 some legitimate operator text, return a pointer to the
2642 beginning of the substring of the operator text.
2643 Otherwise, return "". */
2645 operator_chars (char *p, char **end)
2648 if (strncmp (p, "operator", 8))
2652 /* Don't get faked out by `operator' being part of a longer
2654 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2657 /* Allow some whitespace between `operator' and the operator symbol. */
2658 while (*p == ' ' || *p == '\t')
2661 /* Recognize 'operator TYPENAME'. */
2663 if (isalpha (*p) || *p == '_' || *p == '$')
2666 while (isalnum (*q) || *q == '_' || *q == '$')
2675 case '\\': /* regexp quoting */
2678 if (p[2] == '=') /* 'operator\*=' */
2680 else /* 'operator\*' */
2684 else if (p[1] == '[')
2687 error (_("mismatched quoting on brackets, try 'operator\\[\\]'"));
2688 else if (p[2] == '\\' && p[3] == ']')
2690 *end = p + 4; /* 'operator\[\]' */
2694 error (_("nothing is allowed between '[' and ']'"));
2698 /* Gratuitous qoute: skip it and move on. */
2720 if (p[0] == '-' && p[1] == '>')
2722 /* Struct pointer member operator 'operator->'. */
2725 *end = p + 3; /* 'operator->*' */
2728 else if (p[2] == '\\')
2730 *end = p + 4; /* Hopefully 'operator->\*' */
2735 *end = p + 2; /* 'operator->' */
2739 if (p[1] == '=' || p[1] == p[0])
2750 error (_("`operator ()' must be specified without whitespace in `()'"));
2755 error (_("`operator ?:' must be specified without whitespace in `?:'"));
2760 error (_("`operator []' must be specified without whitespace in `[]'"));
2764 error (_("`operator %s' not supported"), p);
2773 /* If FILE is not already in the table of files, return zero;
2774 otherwise return non-zero. Optionally add FILE to the table if ADD
2775 is non-zero. If *FIRST is non-zero, forget the old table
2778 filename_seen (const char *file, int add, int *first)
2780 /* Table of files seen so far. */
2781 static const char **tab = NULL;
2782 /* Allocated size of tab in elements.
2783 Start with one 256-byte block (when using GNU malloc.c).
2784 24 is the malloc overhead when range checking is in effect. */
2785 static int tab_alloc_size = (256 - 24) / sizeof (char *);
2786 /* Current size of tab in elements. */
2787 static int tab_cur_size;
2793 tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
2797 /* Is FILE in tab? */
2798 for (p = tab; p < tab + tab_cur_size; p++)
2799 if (strcmp (*p, file) == 0)
2802 /* No; maybe add it to tab. */
2805 if (tab_cur_size == tab_alloc_size)
2807 tab_alloc_size *= 2;
2808 tab = (const char **) xrealloc ((char *) tab,
2809 tab_alloc_size * sizeof (*tab));
2811 tab[tab_cur_size++] = file;
2817 /* Slave routine for sources_info. Force line breaks at ,'s.
2818 NAME is the name to print and *FIRST is nonzero if this is the first
2819 name printed. Set *FIRST to zero. */
2821 output_source_filename (const char *name, int *first)
2823 /* Since a single source file can result in several partial symbol
2824 tables, we need to avoid printing it more than once. Note: if
2825 some of the psymtabs are read in and some are not, it gets
2826 printed both under "Source files for which symbols have been
2827 read" and "Source files for which symbols will be read in on
2828 demand". I consider this a reasonable way to deal with the
2829 situation. I'm not sure whether this can also happen for
2830 symtabs; it doesn't hurt to check. */
2832 /* Was NAME already seen? */
2833 if (filename_seen (name, 1, first))
2835 /* Yes; don't print it again. */
2838 /* No; print it and reset *FIRST. */
2845 printf_filtered (", ");
2849 fputs_filtered (name, gdb_stdout);
2853 sources_info (char *ignore, int from_tty)
2856 struct partial_symtab *ps;
2857 struct objfile *objfile;
2860 if (!have_full_symbols () && !have_partial_symbols ())
2862 error (_("No symbol table is loaded. Use the \"file\" command."));
2865 printf_filtered ("Source files for which symbols have been read in:\n\n");
2868 ALL_SYMTABS (objfile, s)
2870 const char *fullname = symtab_to_fullname (s);
2871 output_source_filename (fullname ? fullname : s->filename, &first);
2873 printf_filtered ("\n\n");
2875 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2878 ALL_PSYMTABS (objfile, ps)
2882 const char *fullname = psymtab_to_fullname (ps);
2883 output_source_filename (fullname ? fullname : ps->filename, &first);
2886 printf_filtered ("\n");
2890 file_matches (char *file, char *files[], int nfiles)
2894 if (file != NULL && nfiles != 0)
2896 for (i = 0; i < nfiles; i++)
2898 if (strcmp (files[i], lbasename (file)) == 0)
2902 else if (nfiles == 0)
2907 /* Free any memory associated with a search. */
2909 free_search_symbols (struct symbol_search *symbols)
2911 struct symbol_search *p;
2912 struct symbol_search *next;
2914 for (p = symbols; p != NULL; p = next)
2922 do_free_search_symbols_cleanup (void *symbols)
2924 free_search_symbols (symbols);
2928 make_cleanup_free_search_symbols (struct symbol_search *symbols)
2930 return make_cleanup (do_free_search_symbols_cleanup, symbols);
2933 /* Helper function for sort_search_symbols and qsort. Can only
2934 sort symbols, not minimal symbols. */
2936 compare_search_syms (const void *sa, const void *sb)
2938 struct symbol_search **sym_a = (struct symbol_search **) sa;
2939 struct symbol_search **sym_b = (struct symbol_search **) sb;
2941 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
2942 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
2945 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2946 prevtail where it is, but update its next pointer to point to
2947 the first of the sorted symbols. */
2948 static struct symbol_search *
2949 sort_search_symbols (struct symbol_search *prevtail, int nfound)
2951 struct symbol_search **symbols, *symp, *old_next;
2954 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
2956 symp = prevtail->next;
2957 for (i = 0; i < nfound; i++)
2962 /* Generally NULL. */
2965 qsort (symbols, nfound, sizeof (struct symbol_search *),
2966 compare_search_syms);
2969 for (i = 0; i < nfound; i++)
2971 symp->next = symbols[i];
2974 symp->next = old_next;
2980 /* Search the symbol table for matches to the regular expression REGEXP,
2981 returning the results in *MATCHES.
2983 Only symbols of KIND are searched:
2984 FUNCTIONS_DOMAIN - search all functions
2985 TYPES_DOMAIN - search all type names
2986 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2987 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2988 and constants (enums)
2990 free_search_symbols should be called when *MATCHES is no longer needed.
2992 The results are sorted locally; each symtab's global and static blocks are
2993 separately alphabetized.
2996 search_symbols (char *regexp, domain_enum kind, int nfiles, char *files[],
2997 struct symbol_search **matches)
3000 struct partial_symtab *ps;
3001 struct blockvector *bv;
3004 struct dict_iterator iter;
3006 struct partial_symbol **psym;
3007 struct objfile *objfile;
3008 struct minimal_symbol *msymbol;
3011 static enum minimal_symbol_type types[]
3013 {mst_data, mst_text, mst_abs, mst_unknown};
3014 static enum minimal_symbol_type types2[]
3016 {mst_bss, mst_file_text, mst_abs, mst_unknown};
3017 static enum minimal_symbol_type types3[]
3019 {mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
3020 static enum minimal_symbol_type types4[]
3022 {mst_file_bss, mst_text, mst_abs, mst_unknown};
3023 enum minimal_symbol_type ourtype;
3024 enum minimal_symbol_type ourtype2;
3025 enum minimal_symbol_type ourtype3;
3026 enum minimal_symbol_type ourtype4;
3027 struct symbol_search *sr;
3028 struct symbol_search *psr;
3029 struct symbol_search *tail;
3030 struct cleanup *old_chain = NULL;
3032 if (kind < VARIABLES_DOMAIN)
3033 error (_("must search on specific domain"));
3035 ourtype = types[(int) (kind - VARIABLES_DOMAIN)];
3036 ourtype2 = types2[(int) (kind - VARIABLES_DOMAIN)];
3037 ourtype3 = types3[(int) (kind - VARIABLES_DOMAIN)];
3038 ourtype4 = types4[(int) (kind - VARIABLES_DOMAIN)];
3040 sr = *matches = NULL;
3045 /* Make sure spacing is right for C++ operators.
3046 This is just a courtesy to make the matching less sensitive
3047 to how many spaces the user leaves between 'operator'
3048 and <TYPENAME> or <OPERATOR>. */
3050 char *opname = operator_chars (regexp, &opend);
3053 int fix = -1; /* -1 means ok; otherwise number of spaces needed. */
3054 if (isalpha (*opname) || *opname == '_' || *opname == '$')
3056 /* There should 1 space between 'operator' and 'TYPENAME'. */
3057 if (opname[-1] != ' ' || opname[-2] == ' ')
3062 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3063 if (opname[-1] == ' ')
3066 /* If wrong number of spaces, fix it. */
3069 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
3070 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
3075 if (0 != (val = re_comp (regexp)))
3076 error (_("Invalid regexp (%s): %s"), val, regexp);
3079 /* Search through the partial symtabs *first* for all symbols
3080 matching the regexp. That way we don't have to reproduce all of
3081 the machinery below. */
3083 ALL_PSYMTABS (objfile, ps)
3085 struct partial_symbol **bound, **gbound, **sbound;
3091 gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms;
3092 sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms;
3095 /* Go through all of the symbols stored in a partial
3096 symtab in one loop. */
3097 psym = objfile->global_psymbols.list + ps->globals_offset;
3102 if (bound == gbound && ps->n_static_syms != 0)
3104 psym = objfile->static_psymbols.list + ps->statics_offset;
3115 /* If it would match (logic taken from loop below)
3116 load the file and go on to the next one. We check the
3117 filename here, but that's a bit bogus: we don't know
3118 what file it really comes from until we have full
3119 symtabs. The symbol might be in a header file included by
3120 this psymtab. This only affects Insight. */
3121 if (file_matches (ps->filename, files, nfiles)
3123 || re_exec (SYMBOL_NATURAL_NAME (*psym)) != 0)
3124 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (*psym) != LOC_TYPEDEF
3125 && SYMBOL_CLASS (*psym) != LOC_BLOCK)
3126 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK)
3127 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (*psym) == LOC_TYPEDEF)
3128 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK))))
3130 PSYMTAB_TO_SYMTAB (ps);
3138 /* Here, we search through the minimal symbol tables for functions
3139 and variables that match, and force their symbols to be read.
3140 This is in particular necessary for demangled variable names,
3141 which are no longer put into the partial symbol tables.
3142 The symbol will then be found during the scan of symtabs below.
3144 For functions, find_pc_symtab should succeed if we have debug info
3145 for the function, for variables we have to call lookup_symbol
3146 to determine if the variable has debug info.
3147 If the lookup fails, set found_misc so that we will rescan to print
3148 any matching symbols without debug info.
3151 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
3153 ALL_MSYMBOLS (objfile, msymbol)
3155 if (MSYMBOL_TYPE (msymbol) == ourtype ||
3156 MSYMBOL_TYPE (msymbol) == ourtype2 ||
3157 MSYMBOL_TYPE (msymbol) == ourtype3 ||
3158 MSYMBOL_TYPE (msymbol) == ourtype4)
3161 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
3163 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
3165 /* FIXME: carlton/2003-02-04: Given that the
3166 semantics of lookup_symbol keeps on changing
3167 slightly, it would be a nice idea if we had a
3168 function lookup_symbol_minsym that found the
3169 symbol associated to a given minimal symbol (if
3171 if (kind == FUNCTIONS_DOMAIN
3172 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
3173 (struct block *) NULL,
3183 ALL_PRIMARY_SYMTABS (objfile, s)
3185 bv = BLOCKVECTOR (s);
3186 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3188 struct symbol_search *prevtail = tail;
3190 b = BLOCKVECTOR_BLOCK (bv, i);
3191 ALL_BLOCK_SYMBOLS (b, iter, sym)
3193 struct symtab *real_symtab = SYMBOL_SYMTAB (sym);
3196 if (file_matches (real_symtab->filename, files, nfiles)
3198 || re_exec (SYMBOL_NATURAL_NAME (sym)) != 0)
3199 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3200 && SYMBOL_CLASS (sym) != LOC_BLOCK
3201 && SYMBOL_CLASS (sym) != LOC_CONST)
3202 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK)
3203 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3204 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK))))
3207 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3209 psr->symtab = real_symtab;
3211 psr->msymbol = NULL;
3223 if (prevtail == NULL)
3225 struct symbol_search dummy;
3228 tail = sort_search_symbols (&dummy, nfound);
3231 old_chain = make_cleanup_free_search_symbols (sr);
3234 tail = sort_search_symbols (prevtail, nfound);
3239 /* If there are no eyes, avoid all contact. I mean, if there are
3240 no debug symbols, then print directly from the msymbol_vector. */
3242 if (found_misc || kind != FUNCTIONS_DOMAIN)
3244 ALL_MSYMBOLS (objfile, msymbol)
3246 if (MSYMBOL_TYPE (msymbol) == ourtype ||
3247 MSYMBOL_TYPE (msymbol) == ourtype2 ||
3248 MSYMBOL_TYPE (msymbol) == ourtype3 ||
3249 MSYMBOL_TYPE (msymbol) == ourtype4)
3252 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
3254 /* Functions: Look up by address. */
3255 if (kind != FUNCTIONS_DOMAIN ||
3256 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
3258 /* Variables/Absolutes: Look up by name */
3259 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
3260 (struct block *) NULL, VAR_DOMAIN, 0)
3264 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3266 psr->msymbol = msymbol;
3273 old_chain = make_cleanup_free_search_symbols (sr);
3287 discard_cleanups (old_chain);
3290 /* Helper function for symtab_symbol_info, this function uses
3291 the data returned from search_symbols() to print information
3292 regarding the match to gdb_stdout.
3295 print_symbol_info (domain_enum kind, struct symtab *s, struct symbol *sym,
3296 int block, char *last)
3298 if (last == NULL || strcmp (last, s->filename) != 0)
3300 fputs_filtered ("\nFile ", gdb_stdout);
3301 fputs_filtered (s->filename, gdb_stdout);
3302 fputs_filtered (":\n", gdb_stdout);
3305 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3306 printf_filtered ("static ");
3308 /* Typedef that is not a C++ class */
3309 if (kind == TYPES_DOMAIN
3310 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3311 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3312 /* variable, func, or typedef-that-is-c++-class */
3313 else if (kind < TYPES_DOMAIN ||
3314 (kind == TYPES_DOMAIN &&
3315 SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3317 type_print (SYMBOL_TYPE (sym),
3318 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3319 ? "" : SYMBOL_PRINT_NAME (sym)),
3322 printf_filtered (";\n");
3326 /* This help function for symtab_symbol_info() prints information
3327 for non-debugging symbols to gdb_stdout.
3330 print_msymbol_info (struct minimal_symbol *msymbol)
3334 if (gdbarch_addr_bit (current_gdbarch) <= 32)
3335 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3336 & (CORE_ADDR) 0xffffffff,
3339 tmp = hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3341 printf_filtered ("%s %s\n",
3342 tmp, SYMBOL_PRINT_NAME (msymbol));
3345 /* This is the guts of the commands "info functions", "info types", and
3346 "info variables". It calls search_symbols to find all matches and then
3347 print_[m]symbol_info to print out some useful information about the
3351 symtab_symbol_info (char *regexp, domain_enum kind, int from_tty)
3353 static char *classnames[]
3355 {"variable", "function", "type", "method"};
3356 struct symbol_search *symbols;
3357 struct symbol_search *p;
3358 struct cleanup *old_chain;
3359 char *last_filename = NULL;
3362 /* must make sure that if we're interrupted, symbols gets freed */
3363 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3364 old_chain = make_cleanup_free_search_symbols (symbols);
3366 printf_filtered (regexp
3367 ? "All %ss matching regular expression \"%s\":\n"
3368 : "All defined %ss:\n",
3369 classnames[(int) (kind - VARIABLES_DOMAIN)], regexp);
3371 for (p = symbols; p != NULL; p = p->next)
3375 if (p->msymbol != NULL)
3379 printf_filtered ("\nNon-debugging symbols:\n");
3382 print_msymbol_info (p->msymbol);
3386 print_symbol_info (kind,
3391 last_filename = p->symtab->filename;
3395 do_cleanups (old_chain);
3399 variables_info (char *regexp, int from_tty)
3401 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3405 functions_info (char *regexp, int from_tty)
3407 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3412 types_info (char *regexp, int from_tty)
3414 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3417 /* Breakpoint all functions matching regular expression. */
3420 rbreak_command_wrapper (char *regexp, int from_tty)
3422 rbreak_command (regexp, from_tty);
3426 rbreak_command (char *regexp, int from_tty)
3428 struct symbol_search *ss;
3429 struct symbol_search *p;
3430 struct cleanup *old_chain;
3432 search_symbols (regexp, FUNCTIONS_DOMAIN, 0, (char **) NULL, &ss);
3433 old_chain = make_cleanup_free_search_symbols (ss);
3435 for (p = ss; p != NULL; p = p->next)
3437 if (p->msymbol == NULL)
3439 char *string = alloca (strlen (p->symtab->filename)
3440 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3442 strcpy (string, p->symtab->filename);
3443 strcat (string, ":'");
3444 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3445 strcat (string, "'");
3446 break_command (string, from_tty);
3447 print_symbol_info (FUNCTIONS_DOMAIN,
3451 p->symtab->filename);
3455 char *string = alloca (strlen (SYMBOL_LINKAGE_NAME (p->msymbol))
3457 strcpy (string, "'");
3458 strcat (string, SYMBOL_LINKAGE_NAME (p->msymbol));
3459 strcat (string, "'");
3461 break_command (string, from_tty);
3462 printf_filtered ("<function, no debug info> %s;\n",
3463 SYMBOL_PRINT_NAME (p->msymbol));
3467 do_cleanups (old_chain);
3471 /* Helper routine for make_symbol_completion_list. */
3473 static int return_val_size;
3474 static int return_val_index;
3475 static char **return_val;
3477 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3478 completion_list_add_name \
3479 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3481 /* Test to see if the symbol specified by SYMNAME (which is already
3482 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3483 characters. If so, add it to the current completion list. */
3486 completion_list_add_name (char *symname, char *sym_text, int sym_text_len,
3487 char *text, char *word)
3492 /* clip symbols that cannot match */
3494 if (strncmp (symname, sym_text, sym_text_len) != 0)
3499 /* We have a match for a completion, so add SYMNAME to the current list
3500 of matches. Note that the name is moved to freshly malloc'd space. */
3504 if (word == sym_text)
3506 new = xmalloc (strlen (symname) + 5);
3507 strcpy (new, symname);
3509 else if (word > sym_text)
3511 /* Return some portion of symname. */
3512 new = xmalloc (strlen (symname) + 5);
3513 strcpy (new, symname + (word - sym_text));
3517 /* Return some of SYM_TEXT plus symname. */
3518 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
3519 strncpy (new, word, sym_text - word);
3520 new[sym_text - word] = '\0';
3521 strcat (new, symname);
3524 if (return_val_index + 3 > return_val_size)
3526 newsize = (return_val_size *= 2) * sizeof (char *);
3527 return_val = (char **) xrealloc ((char *) return_val, newsize);
3529 return_val[return_val_index++] = new;
3530 return_val[return_val_index] = NULL;
3534 /* ObjC: In case we are completing on a selector, look as the msymbol
3535 again and feed all the selectors into the mill. */
3538 completion_list_objc_symbol (struct minimal_symbol *msymbol, char *sym_text,
3539 int sym_text_len, char *text, char *word)
3541 static char *tmp = NULL;
3542 static unsigned int tmplen = 0;
3544 char *method, *category, *selector;
3547 method = SYMBOL_NATURAL_NAME (msymbol);
3549 /* Is it a method? */
3550 if ((method[0] != '-') && (method[0] != '+'))
3553 if (sym_text[0] == '[')
3554 /* Complete on shortened method method. */
3555 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
3557 while ((strlen (method) + 1) >= tmplen)
3563 tmp = xrealloc (tmp, tmplen);
3565 selector = strchr (method, ' ');
3566 if (selector != NULL)
3569 category = strchr (method, '(');
3571 if ((category != NULL) && (selector != NULL))
3573 memcpy (tmp, method, (category - method));
3574 tmp[category - method] = ' ';
3575 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
3576 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3577 if (sym_text[0] == '[')
3578 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
3581 if (selector != NULL)
3583 /* Complete on selector only. */
3584 strcpy (tmp, selector);
3585 tmp2 = strchr (tmp, ']');
3589 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3593 /* Break the non-quoted text based on the characters which are in
3594 symbols. FIXME: This should probably be language-specific. */
3597 language_search_unquoted_string (char *text, char *p)
3599 for (; p > text; --p)
3601 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3605 if ((current_language->la_language == language_objc))
3607 if (p[-1] == ':') /* might be part of a method name */
3609 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
3610 p -= 2; /* beginning of a method name */
3611 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
3612 { /* might be part of a method name */
3615 /* Seeing a ' ' or a '(' is not conclusive evidence
3616 that we are in the middle of a method name. However,
3617 finding "-[" or "+[" should be pretty un-ambiguous.
3618 Unfortunately we have to find it now to decide. */
3621 if (isalnum (t[-1]) || t[-1] == '_' ||
3622 t[-1] == ' ' || t[-1] == ':' ||
3623 t[-1] == '(' || t[-1] == ')')
3628 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
3629 p = t - 2; /* method name detected */
3630 /* else we leave with p unchanged */
3640 default_make_symbol_completion_list (char *text, char *word)
3642 /* Problem: All of the symbols have to be copied because readline
3643 frees them. I'm not going to worry about this; hopefully there
3644 won't be that many. */
3648 struct partial_symtab *ps;
3649 struct minimal_symbol *msymbol;
3650 struct objfile *objfile;
3651 struct block *b, *surrounding_static_block = 0;
3652 struct dict_iterator iter;
3654 struct partial_symbol **psym;
3655 /* The symbol we are completing on. Points in same buffer as text. */
3657 /* Length of sym_text. */
3660 /* Now look for the symbol we are supposed to complete on. */
3664 char *quote_pos = NULL;
3666 /* First see if this is a quoted string. */
3668 for (p = text; *p != '\0'; ++p)
3670 if (quote_found != '\0')
3672 if (*p == quote_found)
3673 /* Found close quote. */
3675 else if (*p == '\\' && p[1] == quote_found)
3676 /* A backslash followed by the quote character
3677 doesn't end the string. */
3680 else if (*p == '\'' || *p == '"')
3686 if (quote_found == '\'')
3687 /* A string within single quotes can be a symbol, so complete on it. */
3688 sym_text = quote_pos + 1;
3689 else if (quote_found == '"')
3690 /* A double-quoted string is never a symbol, nor does it make sense
3691 to complete it any other way. */
3693 return_val = (char **) xmalloc (sizeof (char *));
3694 return_val[0] = NULL;
3699 /* It is not a quoted string. Break it based on the characters
3700 which are in symbols. */
3703 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3712 sym_text_len = strlen (sym_text);
3714 return_val_size = 100;
3715 return_val_index = 0;
3716 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3717 return_val[0] = NULL;
3719 /* Look through the partial symtabs for all symbols which begin
3720 by matching SYM_TEXT. Add each one that you find to the list. */
3722 ALL_PSYMTABS (objfile, ps)
3724 /* If the psymtab's been read in we'll get it when we search
3725 through the blockvector. */
3729 for (psym = objfile->global_psymbols.list + ps->globals_offset;
3730 psym < (objfile->global_psymbols.list + ps->globals_offset
3731 + ps->n_global_syms);
3734 /* If interrupted, then quit. */
3736 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3739 for (psym = objfile->static_psymbols.list + ps->statics_offset;
3740 psym < (objfile->static_psymbols.list + ps->statics_offset
3741 + ps->n_static_syms);
3745 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3749 /* At this point scan through the misc symbol vectors and add each
3750 symbol you find to the list. Eventually we want to ignore
3751 anything that isn't a text symbol (everything else will be
3752 handled by the psymtab code above). */
3754 ALL_MSYMBOLS (objfile, msymbol)
3757 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
3759 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
3762 /* Search upwards from currently selected frame (so that we can
3763 complete on local vars. */
3765 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
3767 if (!BLOCK_SUPERBLOCK (b))
3769 surrounding_static_block = b; /* For elmin of dups */
3772 /* Also catch fields of types defined in this places which match our
3773 text string. Only complete on types visible from current context. */
3775 ALL_BLOCK_SYMBOLS (b, iter, sym)
3778 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3779 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3781 struct type *t = SYMBOL_TYPE (sym);
3782 enum type_code c = TYPE_CODE (t);
3784 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
3786 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
3788 if (TYPE_FIELD_NAME (t, j))
3790 completion_list_add_name (TYPE_FIELD_NAME (t, j),
3791 sym_text, sym_text_len, text, word);
3799 /* Go through the symtabs and check the externs and statics for
3800 symbols which match. */
3802 ALL_PRIMARY_SYMTABS (objfile, s)
3805 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3806 ALL_BLOCK_SYMBOLS (b, iter, sym)
3808 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3812 ALL_PRIMARY_SYMTABS (objfile, s)
3815 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3816 /* Don't do this block twice. */
3817 if (b == surrounding_static_block)
3819 ALL_BLOCK_SYMBOLS (b, iter, sym)
3821 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3825 return (return_val);
3828 /* Return a NULL terminated array of all symbols (regardless of class)
3829 which begin by matching TEXT. If the answer is no symbols, then
3830 the return value is an array which contains only a NULL pointer. */
3833 make_symbol_completion_list (char *text, char *word)
3835 return current_language->la_make_symbol_completion_list (text, word);
3838 /* Like make_symbol_completion_list, but returns a list of symbols
3839 defined in a source file FILE. */
3842 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
3847 struct dict_iterator iter;
3848 /* The symbol we are completing on. Points in same buffer as text. */
3850 /* Length of sym_text. */
3853 /* Now look for the symbol we are supposed to complete on.
3854 FIXME: This should be language-specific. */
3858 char *quote_pos = NULL;
3860 /* First see if this is a quoted string. */
3862 for (p = text; *p != '\0'; ++p)
3864 if (quote_found != '\0')
3866 if (*p == quote_found)
3867 /* Found close quote. */
3869 else if (*p == '\\' && p[1] == quote_found)
3870 /* A backslash followed by the quote character
3871 doesn't end the string. */
3874 else if (*p == '\'' || *p == '"')
3880 if (quote_found == '\'')
3881 /* A string within single quotes can be a symbol, so complete on it. */
3882 sym_text = quote_pos + 1;
3883 else if (quote_found == '"')
3884 /* A double-quoted string is never a symbol, nor does it make sense
3885 to complete it any other way. */
3887 return_val = (char **) xmalloc (sizeof (char *));
3888 return_val[0] = NULL;
3893 /* Not a quoted string. */
3894 sym_text = language_search_unquoted_string (text, p);
3898 sym_text_len = strlen (sym_text);
3900 return_val_size = 10;
3901 return_val_index = 0;
3902 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3903 return_val[0] = NULL;
3905 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3907 s = lookup_symtab (srcfile);
3910 /* Maybe they typed the file with leading directories, while the
3911 symbol tables record only its basename. */
3912 const char *tail = lbasename (srcfile);
3915 s = lookup_symtab (tail);
3918 /* If we have no symtab for that file, return an empty list. */
3920 return (return_val);
3922 /* Go through this symtab and check the externs and statics for
3923 symbols which match. */
3925 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3926 ALL_BLOCK_SYMBOLS (b, iter, sym)
3928 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3931 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3932 ALL_BLOCK_SYMBOLS (b, iter, sym)
3934 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3937 return (return_val);
3940 /* A helper function for make_source_files_completion_list. It adds
3941 another file name to a list of possible completions, growing the
3942 list as necessary. */
3945 add_filename_to_list (const char *fname, char *text, char *word,
3946 char ***list, int *list_used, int *list_alloced)
3949 size_t fnlen = strlen (fname);
3951 if (*list_used + 1 >= *list_alloced)
3954 *list = (char **) xrealloc ((char *) *list,
3955 *list_alloced * sizeof (char *));
3960 /* Return exactly fname. */
3961 new = xmalloc (fnlen + 5);
3962 strcpy (new, fname);
3964 else if (word > text)
3966 /* Return some portion of fname. */
3967 new = xmalloc (fnlen + 5);
3968 strcpy (new, fname + (word - text));
3972 /* Return some of TEXT plus fname. */
3973 new = xmalloc (fnlen + (text - word) + 5);
3974 strncpy (new, word, text - word);
3975 new[text - word] = '\0';
3976 strcat (new, fname);
3978 (*list)[*list_used] = new;
3979 (*list)[++*list_used] = NULL;
3983 not_interesting_fname (const char *fname)
3985 static const char *illegal_aliens[] = {
3986 "_globals_", /* inserted by coff_symtab_read */
3991 for (i = 0; illegal_aliens[i]; i++)
3993 if (strcmp (fname, illegal_aliens[i]) == 0)
3999 /* Return a NULL terminated array of all source files whose names
4000 begin with matching TEXT. The file names are looked up in the
4001 symbol tables of this program. If the answer is no matchess, then
4002 the return value is an array which contains only a NULL pointer. */
4005 make_source_files_completion_list (char *text, char *word)
4008 struct partial_symtab *ps;
4009 struct objfile *objfile;
4011 int list_alloced = 1;
4013 size_t text_len = strlen (text);
4014 char **list = (char **) xmalloc (list_alloced * sizeof (char *));
4015 const char *base_name;
4019 if (!have_full_symbols () && !have_partial_symbols ())
4022 ALL_SYMTABS (objfile, s)
4024 if (not_interesting_fname (s->filename))
4026 if (!filename_seen (s->filename, 1, &first)
4027 #if HAVE_DOS_BASED_FILE_SYSTEM
4028 && strncasecmp (s->filename, text, text_len) == 0
4030 && strncmp (s->filename, text, text_len) == 0
4034 /* This file matches for a completion; add it to the current
4036 add_filename_to_list (s->filename, text, word,
4037 &list, &list_used, &list_alloced);
4041 /* NOTE: We allow the user to type a base name when the
4042 debug info records leading directories, but not the other
4043 way around. This is what subroutines of breakpoint
4044 command do when they parse file names. */
4045 base_name = lbasename (s->filename);
4046 if (base_name != s->filename
4047 && !filename_seen (base_name, 1, &first)
4048 #if HAVE_DOS_BASED_FILE_SYSTEM
4049 && strncasecmp (base_name, text, text_len) == 0
4051 && strncmp (base_name, text, text_len) == 0
4054 add_filename_to_list (base_name, text, word,
4055 &list, &list_used, &list_alloced);
4059 ALL_PSYMTABS (objfile, ps)
4061 if (not_interesting_fname (ps->filename))
4065 if (!filename_seen (ps->filename, 1, &first)
4066 #if HAVE_DOS_BASED_FILE_SYSTEM
4067 && strncasecmp (ps->filename, text, text_len) == 0
4069 && strncmp (ps->filename, text, text_len) == 0
4073 /* This file matches for a completion; add it to the
4074 current list of matches. */
4075 add_filename_to_list (ps->filename, text, word,
4076 &list, &list_used, &list_alloced);
4081 base_name = lbasename (ps->filename);
4082 if (base_name != ps->filename
4083 && !filename_seen (base_name, 1, &first)
4084 #if HAVE_DOS_BASED_FILE_SYSTEM
4085 && strncasecmp (base_name, text, text_len) == 0
4087 && strncmp (base_name, text, text_len) == 0
4090 add_filename_to_list (base_name, text, word,
4091 &list, &list_used, &list_alloced);
4099 /* Determine if PC is in the prologue of a function. The prologue is the area
4100 between the first instruction of a function, and the first executable line.
4101 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4103 If non-zero, func_start is where we think the prologue starts, possibly
4104 by previous examination of symbol table information.
4108 in_prologue (CORE_ADDR pc, CORE_ADDR func_start)
4110 struct symtab_and_line sal;
4111 CORE_ADDR func_addr, func_end;
4113 /* We have several sources of information we can consult to figure
4115 - Compilers usually emit line number info that marks the prologue
4116 as its own "source line". So the ending address of that "line"
4117 is the end of the prologue. If available, this is the most
4119 - The minimal symbols and partial symbols, which can usually tell
4120 us the starting and ending addresses of a function.
4121 - If we know the function's start address, we can call the
4122 architecture-defined gdbarch_skip_prologue function to analyze the
4123 instruction stream and guess where the prologue ends.
4124 - Our `func_start' argument; if non-zero, this is the caller's
4125 best guess as to the function's entry point. At the time of
4126 this writing, handle_inferior_event doesn't get this right, so
4127 it should be our last resort. */
4129 /* Consult the partial symbol table, to find which function
4131 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
4133 CORE_ADDR prologue_end;
4135 /* We don't even have minsym information, so fall back to using
4136 func_start, if given. */
4138 return 1; /* We *might* be in a prologue. */
4140 prologue_end = gdbarch_skip_prologue (current_gdbarch, func_start);
4142 return func_start <= pc && pc < prologue_end;
4145 /* If we have line number information for the function, that's
4146 usually pretty reliable. */
4147 sal = find_pc_line (func_addr, 0);
4149 /* Now sal describes the source line at the function's entry point,
4150 which (by convention) is the prologue. The end of that "line",
4151 sal.end, is the end of the prologue.
4153 Note that, for functions whose source code is all on a single
4154 line, the line number information doesn't always end up this way.
4155 So we must verify that our purported end-of-prologue address is
4156 *within* the function, not at its start or end. */
4158 || sal.end <= func_addr
4159 || func_end <= sal.end)
4161 /* We don't have any good line number info, so use the minsym
4162 information, together with the architecture-specific prologue
4164 CORE_ADDR prologue_end = gdbarch_skip_prologue
4165 (current_gdbarch, func_addr);
4167 return func_addr <= pc && pc < prologue_end;
4170 /* We have line number info, and it looks good. */
4171 return func_addr <= pc && pc < sal.end;
4174 /* Given PC at the function's start address, attempt to find the
4175 prologue end using SAL information. Return zero if the skip fails.
4177 A non-optimized prologue traditionally has one SAL for the function
4178 and a second for the function body. A single line function has
4179 them both pointing at the same line.
4181 An optimized prologue is similar but the prologue may contain
4182 instructions (SALs) from the instruction body. Need to skip those
4183 while not getting into the function body.
4185 The functions end point and an increasing SAL line are used as
4186 indicators of the prologue's endpoint.
4188 This code is based on the function refine_prologue_limit (versions
4189 found in both ia64 and ppc). */
4192 skip_prologue_using_sal (CORE_ADDR func_addr)
4194 struct symtab_and_line prologue_sal;
4198 /* Get an initial range for the function. */
4199 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
4200 start_pc += gdbarch_deprecated_function_start_offset (current_gdbarch);
4202 prologue_sal = find_pc_line (start_pc, 0);
4203 if (prologue_sal.line != 0)
4205 /* If there is only one sal that covers the entire function,
4206 then it is probably a single line function, like
4208 if (prologue_sal.end >= end_pc)
4210 while (prologue_sal.end < end_pc)
4212 struct symtab_and_line sal;
4214 sal = find_pc_line (prologue_sal.end, 0);
4217 /* Assume that a consecutive SAL for the same (or larger)
4218 line mark the prologue -> body transition. */
4219 if (sal.line >= prologue_sal.line)
4221 /* The case in which compiler's optimizer/scheduler has
4222 moved instructions into the prologue. We look ahead in
4223 the function looking for address ranges whose
4224 corresponding line number is less the first one that we
4225 found for the function. This is more conservative then
4226 refine_prologue_limit which scans a large number of SALs
4227 looking for any in the prologue */
4231 return prologue_sal.end;
4234 struct symtabs_and_lines
4235 decode_line_spec (char *string, int funfirstline)
4237 struct symtabs_and_lines sals;
4238 struct symtab_and_line cursal;
4241 error (_("Empty line specification."));
4243 /* We use whatever is set as the current source line. We do not try
4244 and get a default or it will recursively call us! */
4245 cursal = get_current_source_symtab_and_line ();
4247 sals = decode_line_1 (&string, funfirstline,
4248 cursal.symtab, cursal.line,
4249 (char ***) NULL, NULL);
4252 error (_("Junk at end of line specification: %s"), string);
4257 static char *name_of_main;
4260 set_main_name (const char *name)
4262 if (name_of_main != NULL)
4264 xfree (name_of_main);
4265 name_of_main = NULL;
4269 name_of_main = xstrdup (name);
4273 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4277 find_main_name (void)
4279 const char *new_main_name;
4281 /* Try to see if the main procedure is in Ada. */
4282 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4283 be to add a new method in the language vector, and call this
4284 method for each language until one of them returns a non-empty
4285 name. This would allow us to remove this hard-coded call to
4286 an Ada function. It is not clear that this is a better approach
4287 at this point, because all methods need to be written in a way
4288 such that false positives never be returned. For instance, it is
4289 important that a method does not return a wrong name for the main
4290 procedure if the main procedure is actually written in a different
4291 language. It is easy to guaranty this with Ada, since we use a
4292 special symbol generated only when the main in Ada to find the name
4293 of the main procedure. It is difficult however to see how this can
4294 be guarantied for languages such as C, for instance. This suggests
4295 that order of call for these methods becomes important, which means
4296 a more complicated approach. */
4297 new_main_name = ada_main_name ();
4298 if (new_main_name != NULL)
4300 set_main_name (new_main_name);
4304 new_main_name = pascal_main_name ();
4305 if (new_main_name != NULL)
4307 set_main_name (new_main_name);
4311 /* The languages above didn't identify the name of the main procedure.
4312 Fallback to "main". */
4313 set_main_name ("main");
4319 if (name_of_main == NULL)
4322 return name_of_main;
4325 /* Handle ``executable_changed'' events for the symtab module. */
4328 symtab_observer_executable_changed (void *unused)
4330 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4331 set_main_name (NULL);
4334 /* Helper to expand_line_sal below. Appends new sal to SAL,
4335 initializing it from SYMTAB, LINENO and PC. */
4337 append_expanded_sal (struct symtabs_and_lines *sal,
4338 struct symtab *symtab,
4339 int lineno, CORE_ADDR pc)
4341 CORE_ADDR func_addr, func_end;
4343 sal->sals = xrealloc (sal->sals,
4344 sizeof (sal->sals[0])
4345 * (sal->nelts + 1));
4346 init_sal (sal->sals + sal->nelts);
4347 sal->sals[sal->nelts].symtab = symtab;
4348 sal->sals[sal->nelts].section = NULL;
4349 sal->sals[sal->nelts].end = 0;
4350 sal->sals[sal->nelts].line = lineno;
4351 sal->sals[sal->nelts].pc = pc;
4355 /* Compute a set of all sals in
4356 the entire program that correspond to same file
4357 and line as SAL and return those. If there
4358 are several sals that belong to the same block,
4359 only one sal for the block is included in results. */
4361 struct symtabs_and_lines
4362 expand_line_sal (struct symtab_and_line sal)
4364 struct symtabs_and_lines ret, this_line;
4366 struct objfile *objfile;
4367 struct partial_symtab *psymtab;
4368 struct symtab *symtab;
4371 struct block **blocks = NULL;
4377 if (sal.symtab == NULL || sal.line == 0 || sal.pc != 0)
4379 ret.sals = xmalloc (sizeof (struct symtab_and_line));
4386 struct linetable_entry *best_item = 0;
4387 struct symtab *best_symtab = 0;
4392 /* We meed to find all symtabs for a file which name
4393 is described by sal. We cannot just directly
4394 iterate over symtabs, since a symtab might not be
4395 yet created. We also cannot iterate over psymtabs,
4396 calling PSYMTAB_TO_SYMTAB and working on that symtab,
4397 since PSYMTAB_TO_SYMTAB will return NULL for psymtab
4398 corresponding to an included file. Therefore, we do
4399 first pass over psymtabs, reading in those with
4400 the right name. Then, we iterate over symtabs, knowing
4401 that all symtabs we're interested in are loaded. */
4403 ALL_PSYMTABS (objfile, psymtab)
4405 if (strcmp (sal.symtab->filename,
4406 psymtab->filename) == 0)
4407 PSYMTAB_TO_SYMTAB (psymtab);
4411 /* For each symtab, we add all pcs to ret.sals. I'm actually
4412 not sure what to do if we have exact match in one symtab,
4413 and non-exact match on another symtab.
4415 ALL_SYMTABS (objfile, symtab)
4417 if (strcmp (sal.symtab->filename,
4418 symtab->filename) == 0)
4420 struct linetable *l;
4422 l = LINETABLE (symtab);
4427 for (j = 0; j < len; j++)
4429 struct linetable_entry *item = &(l->item[j]);
4431 if (item->line == lineno)
4434 append_expanded_sal (&ret, symtab, lineno, item->pc);
4436 else if (!exact && item->line > lineno
4437 && (best_item == NULL || item->line < best_item->line))
4441 best_symtab = symtab;
4446 if (!exact && best_item)
4447 append_expanded_sal (&ret, best_symtab, lineno, best_item->pc);
4450 /* For optimized code, compiler can scatter one source line accross
4451 disjoint ranges of PC values, even when no duplicate functions
4452 or inline functions are involved. For example, 'for (;;)' inside
4453 non-template non-inline non-ctor-or-dtor function can result
4454 in two PC ranges. In this case, we don't want to set breakpoint
4455 on first PC of each range. To filter such cases, we use containing
4456 blocks -- for each PC found above we see if there are other PCs
4457 that are in the same block. If yes, the other PCs are filtered out. */
4459 filter = alloca (ret.nelts * sizeof (int));
4460 blocks = alloca (ret.nelts * sizeof (struct block *));
4461 for (i = 0; i < ret.nelts; ++i)
4464 blocks[i] = block_for_pc (ret.sals[i].pc);
4467 for (i = 0; i < ret.nelts; ++i)
4468 if (blocks[i] != NULL)
4469 for (j = i+1; j < ret.nelts; ++j)
4470 if (blocks[j] == blocks[i])
4478 struct symtab_and_line *final =
4479 xmalloc (sizeof (struct symtab_and_line) * (ret.nelts-deleted));
4481 for (i = 0, j = 0; i < ret.nelts; ++i)
4483 final[j++] = ret.sals[i];
4485 ret.nelts -= deleted;
4495 _initialize_symtab (void)
4497 add_info ("variables", variables_info, _("\
4498 All global and static variable names, or those matching REGEXP."));
4500 add_com ("whereis", class_info, variables_info, _("\
4501 All global and static variable names, or those matching REGEXP."));
4503 add_info ("functions", functions_info,
4504 _("All function names, or those matching REGEXP."));
4507 /* FIXME: This command has at least the following problems:
4508 1. It prints builtin types (in a very strange and confusing fashion).
4509 2. It doesn't print right, e.g. with
4510 typedef struct foo *FOO
4511 type_print prints "FOO" when we want to make it (in this situation)
4512 print "struct foo *".
4513 I also think "ptype" or "whatis" is more likely to be useful (but if
4514 there is much disagreement "info types" can be fixed). */
4515 add_info ("types", types_info,
4516 _("All type names, or those matching REGEXP."));
4518 add_info ("sources", sources_info,
4519 _("Source files in the program."));
4521 add_com ("rbreak", class_breakpoint, rbreak_command,
4522 _("Set a breakpoint for all functions matching REGEXP."));
4526 add_com ("lf", class_info, sources_info,
4527 _("Source files in the program"));
4528 add_com ("lg", class_info, variables_info, _("\
4529 All global and static variable names, or those matching REGEXP."));
4532 add_setshow_enum_cmd ("multiple-symbols", no_class,
4533 multiple_symbols_modes, &multiple_symbols_mode,
4535 Set the debugger behavior when more than one symbol are possible matches\n\
4536 in an expression."), _("\
4537 Show how the debugger handles ambiguities in expressions."), _("\
4538 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4539 NULL, NULL, &setlist, &showlist);
4541 /* Initialize the one built-in type that isn't language dependent... */
4542 builtin_type_error = init_type (TYPE_CODE_ERROR, 0, 0,
4543 "<unknown type>", (struct objfile *) NULL);
4545 observer_attach_executable_changed (symtab_observer_executable_changed);