1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
34 #include "call-cmds.h"
35 #include "gdb_regex.h"
36 #include "expression.h"
42 #include "filenames.h" /* for FILENAME_CMP */
43 #include "objc-lang.h"
47 #include "gdb_obstack.h"
50 #include <sys/types.h>
52 #include "gdb_string.h"
57 /* Prototypes for local functions */
59 static void completion_list_add_name (char *, char *, int, char *, char *);
61 static void rbreak_command (char *, int);
63 static void types_info (char *, int);
65 static void functions_info (char *, int);
67 static void variables_info (char *, int);
69 static void sources_info (char *, int);
71 static void output_source_filename (char *, int *);
73 static int find_line_common (struct linetable *, int, int *);
75 /* This one is used by linespec.c */
77 char *operator_chars (char *p, char **end);
79 static struct partial_symbol *lookup_partial_symbol (struct partial_symtab *,
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 int *is_a_field_of_this,
89 struct symtab **symtab);
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,
96 struct symtab **symtab,
97 const struct block **static_block);
100 struct symbol *lookup_symbol_aux_block (const char *name,
101 const char *linkage_name,
102 const struct block *block,
103 const domain_enum domain,
104 struct symtab **symtab);
107 struct symbol *lookup_symbol_aux_symtabs (int block_index,
109 const char *linkage_name,
110 const domain_enum domain,
111 struct symtab **symtab);
114 struct symbol *lookup_symbol_aux_psymtabs (int block_index,
116 const char *linkage_name,
117 const domain_enum domain,
118 struct symtab **symtab);
122 struct symbol *lookup_symbol_aux_minsyms (const char *name,
123 const char *linkage_name,
124 const domain_enum domain,
125 int *is_a_field_of_this,
126 struct symtab **symtab);
129 static struct symbol *find_active_alias (struct symbol *sym, CORE_ADDR addr);
131 /* This flag is used in hppa-tdep.c, and set in hp-symtab-read.c */
132 /* Signals the presence of objects compiled by HP compilers */
133 int hp_som_som_object_present = 0;
135 static void fixup_section (struct general_symbol_info *, struct objfile *);
137 static int file_matches (char *, char **, int);
139 static void print_symbol_info (domain_enum,
140 struct symtab *, struct symbol *, int, char *);
142 static void print_msymbol_info (struct minimal_symbol *);
144 static void symtab_symbol_info (char *, domain_enum, int);
146 static void overload_list_add_symbol (struct symbol *sym, char *oload_name);
148 void _initialize_symtab (void);
152 /* The single non-language-specific builtin type */
153 struct type *builtin_type_error;
155 /* Block in which the most recently searched-for symbol was found.
156 Might be better to make this a parameter to lookup_symbol and
159 const struct block *block_found;
161 /* Check for a symtab of a specific name; first in symtabs, then in
162 psymtabs. *If* there is no '/' in the name, a match after a '/'
163 in the symtab filename will also work. */
166 lookup_symtab (const char *name)
168 register struct symtab *s;
169 register struct partial_symtab *ps;
170 register struct objfile *objfile;
171 char *real_path = NULL;
172 char *full_path = NULL;
174 /* Here we are interested in canonicalizing an absolute path, not
175 absolutizing a relative path. */
176 if (IS_ABSOLUTE_PATH (name))
178 full_path = xfullpath (name);
179 make_cleanup (xfree, full_path);
180 real_path = gdb_realpath (name);
181 make_cleanup (xfree, real_path);
186 /* First, search for an exact match */
188 ALL_SYMTABS (objfile, s)
190 if (FILENAME_CMP (name, s->filename) == 0)
195 /* If the user gave us an absolute path, try to find the file in
196 this symtab and use its absolute path. */
198 if (full_path != NULL)
200 const char *fp = symtab_to_filename (s);
201 if (FILENAME_CMP (full_path, fp) == 0)
207 if (real_path != NULL)
209 char *rp = gdb_realpath (symtab_to_filename (s));
210 make_cleanup (xfree, rp);
211 if (FILENAME_CMP (real_path, rp) == 0)
218 /* Now, search for a matching tail (only if name doesn't have any dirs) */
220 if (lbasename (name) == name)
221 ALL_SYMTABS (objfile, s)
223 if (FILENAME_CMP (lbasename (s->filename), name) == 0)
227 /* Same search rules as above apply here, but now we look thru the
230 ps = lookup_partial_symtab (name);
235 error ("Internal: readin %s pst for `%s' found when no symtab found.",
238 s = PSYMTAB_TO_SYMTAB (ps);
243 /* At this point, we have located the psymtab for this file, but
244 the conversion to a symtab has failed. This usually happens
245 when we are looking up an include file. In this case,
246 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
247 been created. So, we need to run through the symtabs again in
248 order to find the file.
249 XXX - This is a crock, and should be fixed inside of the the
250 symbol parsing routines. */
254 /* Lookup the partial symbol table of a source file named NAME.
255 *If* there is no '/' in the name, a match after a '/'
256 in the psymtab filename will also work. */
258 struct partial_symtab *
259 lookup_partial_symtab (const char *name)
261 register struct partial_symtab *pst;
262 register struct objfile *objfile;
263 char *full_path = NULL;
264 char *real_path = NULL;
266 /* Here we are interested in canonicalizing an absolute path, not
267 absolutizing a relative path. */
268 if (IS_ABSOLUTE_PATH (name))
270 full_path = xfullpath (name);
271 make_cleanup (xfree, full_path);
272 real_path = gdb_realpath (name);
273 make_cleanup (xfree, real_path);
276 ALL_PSYMTABS (objfile, pst)
278 if (FILENAME_CMP (name, pst->filename) == 0)
283 /* If the user gave us an absolute path, try to find the file in
284 this symtab and use its absolute path. */
285 if (full_path != NULL)
287 if (pst->fullname == NULL)
288 source_full_path_of (pst->filename, &pst->fullname);
289 if (pst->fullname != NULL
290 && FILENAME_CMP (full_path, pst->fullname) == 0)
296 if (real_path != NULL)
299 if (pst->fullname == NULL)
300 source_full_path_of (pst->filename, &pst->fullname);
301 if (pst->fullname != NULL)
303 rp = gdb_realpath (pst->fullname);
304 make_cleanup (xfree, rp);
306 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
313 /* Now, search for a matching tail (only if name doesn't have any dirs) */
315 if (lbasename (name) == name)
316 ALL_PSYMTABS (objfile, pst)
318 if (FILENAME_CMP (lbasename (pst->filename), name) == 0)
325 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
326 full method name, which consist of the class name (from T), the unadorned
327 method name from METHOD_ID, and the signature for the specific overload,
328 specified by SIGNATURE_ID. Note that this function is g++ specific. */
331 gdb_mangle_name (struct type *type, int method_id, int signature_id)
333 int mangled_name_len;
335 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
336 struct fn_field *method = &f[signature_id];
337 char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
338 char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
339 char *newname = type_name_no_tag (type);
341 /* Does the form of physname indicate that it is the full mangled name
342 of a constructor (not just the args)? */
343 int is_full_physname_constructor;
346 int is_destructor = is_destructor_name (physname);
347 /* Need a new type prefix. */
348 char *const_prefix = method->is_const ? "C" : "";
349 char *volatile_prefix = method->is_volatile ? "V" : "";
351 int len = (newname == NULL ? 0 : strlen (newname));
353 /* Nothing to do if physname already contains a fully mangled v3 abi name
354 or an operator name. */
355 if ((physname[0] == '_' && physname[1] == 'Z')
356 || is_operator_name (field_name))
357 return xstrdup (physname);
359 is_full_physname_constructor = is_constructor_name (physname);
362 is_full_physname_constructor || (newname && STREQ (field_name, newname));
365 is_destructor = (strncmp (physname, "__dt", 4) == 0);
367 if (is_destructor || is_full_physname_constructor)
369 mangled_name = (char *) xmalloc (strlen (physname) + 1);
370 strcpy (mangled_name, physname);
376 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
378 else if (physname[0] == 't' || physname[0] == 'Q')
380 /* The physname for template and qualified methods already includes
382 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
388 sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
390 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
391 + strlen (buf) + len + strlen (physname) + 1);
394 mangled_name = (char *) xmalloc (mangled_name_len);
396 mangled_name[0] = '\0';
398 strcpy (mangled_name, field_name);
400 strcat (mangled_name, buf);
401 /* If the class doesn't have a name, i.e. newname NULL, then we just
402 mangle it using 0 for the length of the class. Thus it gets mangled
403 as something starting with `::' rather than `classname::'. */
405 strcat (mangled_name, newname);
407 strcat (mangled_name, physname);
408 return (mangled_name);
412 /* Initialize the language dependent portion of a symbol
413 depending upon the language for the symbol. */
415 symbol_init_language_specific (struct general_symbol_info *gsymbol,
416 enum language language)
418 gsymbol->language = language;
419 if (gsymbol->language == language_cplus
420 || gsymbol->language == language_java
421 || gsymbol->language == language_objc)
423 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
427 memset (&gsymbol->language_specific, 0,
428 sizeof (gsymbol->language_specific));
432 /* Functions to initialize a symbol's mangled name. */
434 /* Create the hash table used for demangled names. Each hash entry is
435 a pair of strings; one for the mangled name and one for the demangled
436 name. The entry is hashed via just the mangled name. */
439 create_demangled_names_hash (struct objfile *objfile)
441 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
442 The hash table code will round this up to the next prime number.
443 Choosing a much larger table size wastes memory, and saves only about
444 1% in symbol reading. */
446 objfile->demangled_names_hash = htab_create_alloc_ex
447 (256, htab_hash_string, (int (*) (const void *, const void *)) streq,
448 NULL, objfile->md, xmcalloc, xmfree);
451 /* Try to determine the demangled name for a symbol, based on the
452 language of that symbol. If the language is set to language_auto,
453 it will attempt to find any demangling algorithm that works and
454 then set the language appropriately. The returned name is allocated
455 by the demangler and should be xfree'd. */
458 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
461 char *demangled = NULL;
463 if (gsymbol->language == language_unknown)
464 gsymbol->language = language_auto;
466 if (gsymbol->language == language_objc
467 || gsymbol->language == language_auto)
470 objc_demangle (mangled, 0);
471 if (demangled != NULL)
473 gsymbol->language = language_objc;
477 if (gsymbol->language == language_cplus
478 || gsymbol->language == language_auto)
481 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
482 if (demangled != NULL)
484 gsymbol->language = language_cplus;
488 if (gsymbol->language == language_java)
491 cplus_demangle (mangled,
492 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
493 if (demangled != NULL)
495 gsymbol->language = language_java;
502 /* Set both the mangled and demangled (if any) names for GSYMBOL based
503 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
504 is used, and the memory comes from that objfile's symbol_obstack.
505 LINKAGE_NAME is copied, so the pointer can be discarded after
506 calling this function. */
508 /* We have to be careful when dealing with Java names: when we run
509 into a Java minimal symbol, we don't know it's a Java symbol, so it
510 gets demangled as a C++ name. This is unfortunate, but there's not
511 much we can do about it: but when demangling partial symbols and
512 regular symbols, we'd better not reuse the wrong demangled name.
513 (See PR gdb/1039.) We solve this by putting a distinctive prefix
514 on Java names when storing them in the hash table. */
516 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
517 don't mind the Java prefix so much: different languages have
518 different demangling requirements, so it's only natural that we
519 need to keep language data around in our demangling cache. But
520 it's not good that the minimal symbol has the wrong demangled name.
521 Unfortunately, I can't think of any easy solution to that
524 #define JAVA_PREFIX "##JAVA$$"
525 #define JAVA_PREFIX_LEN 8
528 symbol_set_names (struct general_symbol_info *gsymbol,
529 const char *linkage_name, int len, struct objfile *objfile)
532 /* A 0-terminated copy of the linkage name. */
533 const char *linkage_name_copy;
534 /* A copy of the linkage name that might have a special Java prefix
535 added to it, for use when looking names up in the hash table. */
536 const char *lookup_name;
537 /* The length of lookup_name. */
540 if (objfile->demangled_names_hash == NULL)
541 create_demangled_names_hash (objfile);
543 /* The stabs reader generally provides names that are not
544 NUL-terminated; most of the other readers don't do this, so we
545 can just use the given copy, unless we're in the Java case. */
546 if (gsymbol->language == language_java)
549 lookup_len = len + JAVA_PREFIX_LEN;
551 alloc_name = alloca (lookup_len + 1);
552 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
553 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
554 alloc_name[lookup_len] = '\0';
556 lookup_name = alloc_name;
557 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
559 else if (linkage_name[len] != '\0')
564 alloc_name = alloca (lookup_len + 1);
565 memcpy (alloc_name, linkage_name, len);
566 alloc_name[lookup_len] = '\0';
568 lookup_name = alloc_name;
569 linkage_name_copy = alloc_name;
574 lookup_name = linkage_name;
575 linkage_name_copy = linkage_name;
578 slot = (char **) htab_find_slot (objfile->demangled_names_hash,
579 lookup_name, INSERT);
581 /* If this name is not in the hash table, add it. */
584 char *demangled_name = symbol_find_demangled_name (gsymbol,
586 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
588 /* If there is a demangled name, place it right after the mangled name.
589 Otherwise, just place a second zero byte after the end of the mangled
591 *slot = obstack_alloc (&objfile->symbol_obstack,
592 lookup_len + demangled_len + 2);
593 memcpy (*slot, lookup_name, lookup_len + 1);
594 if (demangled_name != NULL)
596 memcpy (*slot + lookup_len + 1, demangled_name, demangled_len + 1);
597 xfree (demangled_name);
600 (*slot)[lookup_len + 1] = '\0';
603 gsymbol->name = *slot + lookup_len - len;
604 if ((*slot)[lookup_len + 1] != '\0')
605 gsymbol->language_specific.cplus_specific.demangled_name
606 = &(*slot)[lookup_len + 1];
608 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
611 /* Initialize the demangled name of GSYMBOL if possible. Any required space
612 to store the name is obtained from the specified obstack. The function
613 symbol_set_names, above, should be used instead where possible for more
614 efficient memory usage. */
617 symbol_init_demangled_name (struct general_symbol_info *gsymbol,
618 struct obstack *obstack)
620 char *mangled = gsymbol->name;
621 char *demangled = NULL;
623 demangled = symbol_find_demangled_name (gsymbol, mangled);
624 if (gsymbol->language == language_cplus
625 || gsymbol->language == language_java
626 || gsymbol->language == language_objc)
630 gsymbol->language_specific.cplus_specific.demangled_name
631 = obsavestring (demangled, strlen (demangled), obstack);
635 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
639 /* Unknown language; just clean up quietly. */
645 /* Return the source code name of a symbol. In languages where
646 demangling is necessary, this is the demangled name. */
649 symbol_natural_name (const struct general_symbol_info *gsymbol)
651 if ((gsymbol->language == language_cplus
652 || gsymbol->language == language_java
653 || gsymbol->language == language_objc)
654 && (gsymbol->language_specific.cplus_specific.demangled_name != NULL))
656 return gsymbol->language_specific.cplus_specific.demangled_name;
660 return gsymbol->name;
664 /* Return the demangled name for a symbol based on the language for
665 that symbol. If no demangled name exists, return NULL. */
667 symbol_demangled_name (struct general_symbol_info *gsymbol)
669 if (gsymbol->language == language_cplus
670 || gsymbol->language == language_java
671 || gsymbol->language == language_objc)
672 return gsymbol->language_specific.cplus_specific.demangled_name;
678 /* Initialize the structure fields to zero values. */
680 init_sal (struct symtab_and_line *sal)
691 /* Find which partial symtab on contains PC and SECTION. Return 0 if none. */
693 struct partial_symtab *
694 find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
696 register struct partial_symtab *pst;
697 register struct objfile *objfile;
698 struct minimal_symbol *msymbol;
700 /* If we know that this is not a text address, return failure. This is
701 necessary because we loop based on texthigh and textlow, which do
702 not include the data ranges. */
703 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
705 && (msymbol->type == mst_data
706 || msymbol->type == mst_bss
707 || msymbol->type == mst_abs
708 || msymbol->type == mst_file_data
709 || msymbol->type == mst_file_bss))
712 ALL_PSYMTABS (objfile, pst)
714 if (pc >= pst->textlow && pc < pst->texthigh)
716 struct partial_symtab *tpst;
718 /* An objfile that has its functions reordered might have
719 many partial symbol tables containing the PC, but
720 we want the partial symbol table that contains the
721 function containing the PC. */
722 if (!(objfile->flags & OBJF_REORDERED) &&
723 section == 0) /* can't validate section this way */
729 for (tpst = pst; tpst != NULL; tpst = tpst->next)
731 if (pc >= tpst->textlow && pc < tpst->texthigh)
733 struct partial_symbol *p;
735 p = find_pc_sect_psymbol (tpst, pc, section);
737 && SYMBOL_VALUE_ADDRESS (p)
738 == SYMBOL_VALUE_ADDRESS (msymbol))
748 /* Find which partial symtab contains PC. Return 0 if none.
749 Backward compatibility, no section */
751 struct partial_symtab *
752 find_pc_psymtab (CORE_ADDR pc)
754 return find_pc_sect_psymtab (pc, find_pc_mapped_section (pc));
757 /* Find which partial symbol within a psymtab matches PC and SECTION.
758 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
760 struct partial_symbol *
761 find_pc_sect_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc,
764 struct partial_symbol *best = NULL, *p, **pp;
768 psymtab = find_pc_sect_psymtab (pc, section);
772 /* Cope with programs that start at address 0 */
773 best_pc = (psymtab->textlow != 0) ? psymtab->textlow - 1 : 0;
775 /* Search the global symbols as well as the static symbols, so that
776 find_pc_partial_function doesn't use a minimal symbol and thus
777 cache a bad endaddr. */
778 for (pp = psymtab->objfile->global_psymbols.list + psymtab->globals_offset;
779 (pp - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset)
780 < psymtab->n_global_syms);
784 if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
785 && SYMBOL_CLASS (p) == LOC_BLOCK
786 && pc >= SYMBOL_VALUE_ADDRESS (p)
787 && (SYMBOL_VALUE_ADDRESS (p) > best_pc
788 || (psymtab->textlow == 0
789 && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
791 if (section) /* match on a specific section */
793 fixup_psymbol_section (p, psymtab->objfile);
794 if (SYMBOL_BFD_SECTION (p) != section)
797 best_pc = SYMBOL_VALUE_ADDRESS (p);
802 for (pp = psymtab->objfile->static_psymbols.list + psymtab->statics_offset;
803 (pp - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset)
804 < psymtab->n_static_syms);
808 if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
809 && SYMBOL_CLASS (p) == LOC_BLOCK
810 && pc >= SYMBOL_VALUE_ADDRESS (p)
811 && (SYMBOL_VALUE_ADDRESS (p) > best_pc
812 || (psymtab->textlow == 0
813 && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
815 if (section) /* match on a specific section */
817 fixup_psymbol_section (p, psymtab->objfile);
818 if (SYMBOL_BFD_SECTION (p) != section)
821 best_pc = SYMBOL_VALUE_ADDRESS (p);
829 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
830 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
832 struct partial_symbol *
833 find_pc_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc)
835 return find_pc_sect_psymbol (psymtab, pc, find_pc_mapped_section (pc));
838 /* Debug symbols usually don't have section information. We need to dig that
839 out of the minimal symbols and stash that in the debug symbol. */
842 fixup_section (struct general_symbol_info *ginfo, struct objfile *objfile)
844 struct minimal_symbol *msym;
845 msym = lookup_minimal_symbol (ginfo->name, NULL, objfile);
849 ginfo->bfd_section = SYMBOL_BFD_SECTION (msym);
850 ginfo->section = SYMBOL_SECTION (msym);
855 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
860 if (SYMBOL_BFD_SECTION (sym))
863 fixup_section (&sym->ginfo, objfile);
868 struct partial_symbol *
869 fixup_psymbol_section (struct partial_symbol *psym, struct objfile *objfile)
874 if (SYMBOL_BFD_SECTION (psym))
877 fixup_section (&psym->ginfo, objfile);
882 /* Find the definition for a specified symbol name NAME
883 in domain DOMAIN, visible from lexical block BLOCK.
884 Returns the struct symbol pointer, or zero if no symbol is found.
885 If SYMTAB is non-NULL, store the symbol table in which the
886 symbol was found there, or NULL if not found.
887 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
888 NAME is a field of the current implied argument `this'. If so set
889 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
890 BLOCK_FOUND is set to the block in which NAME is found (in the case of
891 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
893 /* This function has a bunch of loops in it and it would seem to be
894 attractive to put in some QUIT's (though I'm not really sure
895 whether it can run long enough to be really important). But there
896 are a few calls for which it would appear to be bad news to quit
897 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
898 that there is C++ code below which can error(), but that probably
899 doesn't affect these calls since they are looking for a known
900 variable and thus can probably assume it will never hit the C++
904 lookup_symbol (const char *name, const struct block *block,
905 const domain_enum domain, int *is_a_field_of_this,
906 struct symtab **symtab)
908 char *demangled_name = NULL;
909 const char *modified_name = NULL;
910 const char *mangled_name = NULL;
911 int needtofreename = 0;
912 struct symbol *returnval;
914 modified_name = name;
916 /* If we are using C++ language, demangle the name before doing a lookup, so
917 we can always binary search. */
918 if (current_language->la_language == language_cplus)
920 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
924 modified_name = demangled_name;
929 if (case_sensitivity == case_sensitive_off)
935 copy = (char *) alloca (len + 1);
936 for (i= 0; i < len; i++)
937 copy[i] = tolower (name[i]);
939 modified_name = copy;
942 returnval = lookup_symbol_aux (modified_name, mangled_name, block,
943 domain, is_a_field_of_this, symtab);
945 xfree (demangled_name);
950 /* Behave like lookup_symbol_aux except that NAME is the natural name
951 of the symbol that we're looking for and, if LINKAGE_NAME is
952 non-NULL, ensure that the symbol's linkage name matches as
955 static struct symbol *
956 lookup_symbol_aux (const char *name, const char *linkage_name,
957 const struct block *block, const domain_enum domain,
958 int *is_a_field_of_this, struct symtab **symtab)
961 const struct block *static_block;
963 /* Search specified block and its superiors. Don't search
964 STATIC_BLOCK or GLOBAL_BLOCK. */
966 sym = lookup_symbol_aux_local (name, linkage_name, block, domain,
967 symtab, &static_block);
971 /* C++/Java/Objective-C: If requested to do so by the caller,
972 check to see if NAME is a field of `this'. */
973 if (is_a_field_of_this)
975 struct value *v = value_of_this (0);
977 *is_a_field_of_this = 0;
978 if (v && check_field (v, name))
980 *is_a_field_of_this = 1;
987 /* If there's a static block to search, search it next. */
989 /* NOTE: carlton/2002-12-05: There is a question as to whether or
990 not it would be appropriate to search the current global block
991 here as well. (That's what this code used to do before the
992 is_a_field_of_this check was moved up.) On the one hand, it's
993 redundant with the lookup_symbol_aux_symtabs search that happens
994 next. On the other hand, if decode_line_1 is passed an argument
995 like filename:var, then the user presumably wants 'var' to be
996 searched for in filename. On the third hand, there shouldn't be
997 multiple global variables all of which are named 'var', and it's
998 not like decode_line_1 has ever restricted its search to only
999 global variables in a single filename. All in all, only
1000 searching the static block here seems best: it's correct and it's
1003 /* NOTE: carlton/2002-12-05: There's also a possible performance
1004 issue here: if you usually search for global symbols in the
1005 current file, then it would be slightly better to search the
1006 current global block before searching all the symtabs. But there
1007 are other factors that have a much greater effect on performance
1008 than that one, so I don't think we should worry about that for
1011 if (static_block != NULL)
1013 sym = lookup_symbol_aux_block (name, linkage_name, static_block,
1019 /* Now search all global blocks. Do the symtab's first, then
1020 check the psymtab's. If a psymtab indicates the existence
1021 of the desired name as a global, then do psymtab-to-symtab
1022 conversion on the fly and return the found symbol. */
1024 sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name,
1029 sym = lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name,
1034 /* Now search all static file-level symbols. Not strictly correct,
1035 but more useful than an error. Do the symtabs first, then check
1036 the psymtabs. If a psymtab indicates the existence of the
1037 desired name as a file-level static, then do psymtab-to-symtab
1038 conversion on the fly and return the found symbol. */
1040 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, linkage_name,
1045 sym = lookup_symbol_aux_psymtabs (STATIC_BLOCK, name, linkage_name,
1055 /* Check to see if the symbol is defined in BLOCK or its superiors.
1056 Don't search STATIC_BLOCK or GLOBAL_BLOCK. If we don't find a
1057 match, store the address of STATIC_BLOCK in static_block. */
1059 static struct symbol *
1060 lookup_symbol_aux_local (const char *name, const char *linkage_name,
1061 const struct block *block,
1062 const domain_enum domain,
1063 struct symtab **symtab,
1064 const struct block **static_block)
1068 /* Check if either no block is specified or it's a global block. */
1070 if (block == NULL || BLOCK_SUPERBLOCK (block) == NULL)
1072 *static_block = NULL;
1076 while (BLOCK_SUPERBLOCK (BLOCK_SUPERBLOCK (block)) != NULL)
1078 sym = lookup_symbol_aux_block (name, linkage_name, block, domain,
1082 block = BLOCK_SUPERBLOCK (block);
1085 /* We've reached the static block. */
1087 *static_block = block;
1091 /* Look up a symbol in a block; if found, locate its symtab, fixup the
1092 symbol, and set block_found appropriately. */
1094 static struct symbol *
1095 lookup_symbol_aux_block (const char *name, const char *linkage_name,
1096 const struct block *block,
1097 const domain_enum domain,
1098 struct symtab **symtab)
1101 struct objfile *objfile = NULL;
1102 struct blockvector *bv;
1104 struct symtab *s = NULL;
1106 sym = lookup_block_symbol (block, name, linkage_name, domain);
1109 block_found = block;
1112 /* Search the list of symtabs for one which contains the
1113 address of the start of this block. */
1114 ALL_SYMTABS (objfile, s)
1116 bv = BLOCKVECTOR (s);
1117 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1118 if (BLOCK_START (b) <= BLOCK_START (block)
1119 && BLOCK_END (b) > BLOCK_START (block))
1126 return fixup_symbol_section (sym, objfile);
1132 /* Check to see if the symbol is defined in one of the symtabs.
1133 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1134 depending on whether or not we want to search global symbols or
1137 static struct symbol *
1138 lookup_symbol_aux_symtabs (int block_index,
1139 const char *name, const char *linkage_name,
1140 const domain_enum domain,
1141 struct symtab **symtab)
1144 struct objfile *objfile;
1145 struct blockvector *bv;
1146 const struct block *block;
1149 ALL_SYMTABS (objfile, s)
1151 bv = BLOCKVECTOR (s);
1152 block = BLOCKVECTOR_BLOCK (bv, block_index);
1153 sym = lookup_block_symbol (block, name, linkage_name, domain);
1156 block_found = block;
1159 return fixup_symbol_section (sym, objfile);
1166 /* Check to see if the symbol is defined in one of the partial
1167 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1168 STATIC_BLOCK, depending on whether or not we want to search global
1169 symbols or static symbols. */
1171 static struct symbol *
1172 lookup_symbol_aux_psymtabs (int block_index, const char *name,
1173 const char *linkage_name,
1174 const domain_enum domain,
1175 struct symtab **symtab)
1178 struct objfile *objfile;
1179 struct blockvector *bv;
1180 const struct block *block;
1181 struct partial_symtab *ps;
1183 const int psymtab_index = (block_index == GLOBAL_BLOCK ? 1 : 0);
1185 ALL_PSYMTABS (objfile, ps)
1188 && lookup_partial_symbol (ps, name, linkage_name,
1189 psymtab_index, domain))
1191 s = PSYMTAB_TO_SYMTAB (ps);
1192 bv = BLOCKVECTOR (s);
1193 block = BLOCKVECTOR_BLOCK (bv, block_index);
1194 sym = lookup_block_symbol (block, name, linkage_name, domain);
1197 /* This shouldn't be necessary, but as a last resort try
1198 looking in the statics even though the psymtab claimed
1199 the symbol was global, or vice-versa. It's possible
1200 that the psymtab gets it wrong in some cases. */
1202 /* FIXME: carlton/2002-09-30: Should we really do that?
1203 If that happens, isn't it likely to be a GDB error, in
1204 which case we should fix the GDB error rather than
1205 silently dealing with it here? So I'd vote for
1206 removing the check for the symbol in the other
1208 block = BLOCKVECTOR_BLOCK (bv,
1209 block_index == GLOBAL_BLOCK ?
1210 STATIC_BLOCK : GLOBAL_BLOCK);
1211 sym = lookup_block_symbol (block, name, linkage_name, domain);
1213 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>).",
1214 block_index == GLOBAL_BLOCK ? "global" : "static",
1215 name, ps->filename, name, name);
1219 return fixup_symbol_section (sym, objfile);
1227 /* Check for the possibility of the symbol being a function or a
1228 mangled variable that is stored in one of the minimal symbol
1229 tables. Eventually, all global symbols might be resolved in this
1232 /* NOTE: carlton/2002-12-05: At one point, this function was part of
1233 lookup_symbol_aux, and what are now 'return' statements within
1234 lookup_symbol_aux_minsyms returned from lookup_symbol_aux, even if
1235 sym was NULL. As far as I can tell, this was basically accidental;
1236 it didn't happen every time that msymbol was non-NULL, but only if
1237 some additional conditions held as well, and it caused problems
1238 with HP-generated symbol tables. */
1240 /* NOTE: carlton/2003-05-14: This function was once used as part of
1241 lookup_symbol. It is currently unnecessary for correctness
1242 reasons, however, and using it doesn't seem to be any faster than
1243 using lookup_symbol_aux_psymtabs, so I'm commenting it out. */
1245 static struct symbol *
1246 lookup_symbol_aux_minsyms (const char *name,
1247 const char *linkage_name,
1248 const domain_enum domain,
1249 int *is_a_field_of_this,
1250 struct symtab **symtab)
1253 struct blockvector *bv;
1254 const struct block *block;
1255 struct minimal_symbol *msymbol;
1258 if (domain == VAR_DOMAIN)
1260 msymbol = lookup_minimal_symbol (name, NULL, NULL);
1262 if (msymbol != NULL)
1264 /* OK, we found a minimal symbol in spite of not finding any
1265 symbol. There are various possible explanations for
1266 this. One possibility is the symbol exists in code not
1267 compiled -g. Another possibility is that the 'psymtab'
1268 isn't doing its job. A third possibility, related to #2,
1269 is that we were confused by name-mangling. For instance,
1270 maybe the psymtab isn't doing its job because it only
1271 know about demangled names, but we were given a mangled
1274 /* We first use the address in the msymbol to try to locate
1275 the appropriate symtab. Note that find_pc_sect_symtab()
1276 has a side-effect of doing psymtab-to-symtab expansion,
1277 for the found symtab. */
1278 s = find_pc_sect_symtab (SYMBOL_VALUE_ADDRESS (msymbol),
1279 SYMBOL_BFD_SECTION (msymbol));
1282 /* This is a function which has a symtab for its address. */
1283 bv = BLOCKVECTOR (s);
1284 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1286 /* This call used to pass `DEPRECATED_SYMBOL_NAME (msymbol)' as the
1287 `name' argument to lookup_block_symbol. But the name
1288 of a minimal symbol is always mangled, so that seems
1289 to be clearly the wrong thing to pass as the
1292 lookup_block_symbol (block, name, linkage_name, domain);
1293 /* We kept static functions in minimal symbol table as well as
1294 in static scope. We want to find them in the symbol table. */
1297 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1298 sym = lookup_block_symbol (block, name,
1299 linkage_name, domain);
1302 /* NOTE: carlton/2002-12-04: The following comment was
1303 taken from a time when two versions of this function
1304 were part of the body of lookup_symbol_aux: this
1305 comment was taken from the version of the function
1306 that was #ifdef HPUXHPPA, and the comment was right
1307 before the 'return NULL' part of lookup_symbol_aux.
1308 (Hence the "Fall through and return 0" comment.)
1309 Elena did some digging into the situation for
1310 Fortran, and she reports:
1312 "I asked around (thanks to Jeff Knaggs), and I think
1313 the story for Fortran goes like this:
1315 "Apparently, in older Fortrans, '_' was not part of
1316 the user namespace. g77 attached a final '_' to
1317 procedure names as the exported symbols for linkage
1318 (foo_) , but the symbols went in the debug info just
1319 like 'foo'. The rationale behind this is not
1320 completely clear, and maybe it was done to other
1321 symbols as well, not just procedures." */
1323 /* If we get here with sym == 0, the symbol was
1324 found in the minimal symbol table
1325 but not in the symtab.
1326 Fall through and return 0 to use the msymbol
1327 definition of "foo_".
1328 (Note that outer code generally follows up a call
1329 to this routine with a call to lookup_minimal_symbol(),
1330 so a 0 return means we'll just flow into that other routine).
1332 This happens for Fortran "foo_" symbols,
1333 which are "foo" in the symtab.
1335 This can also happen if "asm" is used to make a
1336 regular symbol but not a debugging symbol, e.g.
1337 asm(".globl _main");
1341 if (symtab != NULL && sym != NULL)
1343 return fixup_symbol_section (sym, s->objfile);
1352 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1353 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1354 linkage name matches it. Check the global symbols if GLOBAL, the
1355 static symbols if not */
1357 static struct partial_symbol *
1358 lookup_partial_symbol (struct partial_symtab *pst, const char *name,
1359 const char *linkage_name, int global,
1362 struct partial_symbol *temp;
1363 struct partial_symbol **start, **psym;
1364 struct partial_symbol **top, **real_top, **bottom, **center;
1365 int length = (global ? pst->n_global_syms : pst->n_static_syms);
1366 int do_linear_search = 1;
1373 pst->objfile->global_psymbols.list + pst->globals_offset :
1374 pst->objfile->static_psymbols.list + pst->statics_offset);
1376 if (global) /* This means we can use a binary search. */
1378 do_linear_search = 0;
1380 /* Binary search. This search is guaranteed to end with center
1381 pointing at the earliest partial symbol whose name might be
1382 correct. At that point *all* partial symbols with an
1383 appropriate name will be checked against the correct
1387 top = start + length - 1;
1389 while (top > bottom)
1391 center = bottom + (top - bottom) / 2;
1392 if (!(center < top))
1393 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1394 if (!do_linear_search
1395 && (SYMBOL_LANGUAGE (*center) == language_java))
1397 do_linear_search = 1;
1399 if (strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*center), name) >= 0)
1405 bottom = center + 1;
1408 if (!(top == bottom))
1409 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1411 while (top <= real_top
1412 && (linkage_name != NULL
1413 ? strcmp (SYMBOL_LINKAGE_NAME (*top), linkage_name) == 0
1414 : SYMBOL_MATCHES_NATURAL_NAME (*top,name)))
1416 if (SYMBOL_DOMAIN (*top) == domain)
1424 /* Can't use a binary search or else we found during the binary search that
1425 we should also do a linear search. */
1427 if (do_linear_search)
1429 for (psym = start; psym < start + length; psym++)
1431 if (domain == SYMBOL_DOMAIN (*psym))
1433 if (linkage_name != NULL
1434 ? strcmp (SYMBOL_LINKAGE_NAME (*psym), linkage_name) == 0
1435 : SYMBOL_MATCHES_NATURAL_NAME (*psym, name))
1446 /* Look up a type named NAME in the struct_domain. The type returned
1447 must not be opaque -- i.e., must have at least one field defined
1449 This code was modelled on lookup_symbol -- the parts not relevant to looking
1450 up types were just left out. In particular it's assumed here that types
1451 are available in struct_domain and only at file-static or global blocks. */
1455 lookup_transparent_type (const char *name)
1457 register struct symbol *sym;
1458 register struct symtab *s = NULL;
1459 register struct partial_symtab *ps;
1460 struct blockvector *bv;
1461 register struct objfile *objfile;
1462 register struct block *block;
1464 /* Now search all the global symbols. Do the symtab's first, then
1465 check the psymtab's. If a psymtab indicates the existence
1466 of the desired name as a global, then do psymtab-to-symtab
1467 conversion on the fly and return the found symbol. */
1469 ALL_SYMTABS (objfile, s)
1471 bv = BLOCKVECTOR (s);
1472 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1473 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1474 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1476 return SYMBOL_TYPE (sym);
1480 ALL_PSYMTABS (objfile, ps)
1482 if (!ps->readin && lookup_partial_symbol (ps, name, NULL,
1485 s = PSYMTAB_TO_SYMTAB (ps);
1486 bv = BLOCKVECTOR (s);
1487 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1488 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1491 /* This shouldn't be necessary, but as a last resort
1492 * try looking in the statics even though the psymtab
1493 * claimed the symbol was global. It's possible that
1494 * the psymtab gets it wrong in some cases.
1496 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1497 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1499 error ("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1500 %s may be an inlined function, or may be a template function\n\
1501 (if a template, try specifying an instantiation: %s<type>).",
1502 name, ps->filename, name, name);
1504 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1505 return SYMBOL_TYPE (sym);
1509 /* Now search the static file-level symbols.
1510 Not strictly correct, but more useful than an error.
1511 Do the symtab's first, then
1512 check the psymtab's. If a psymtab indicates the existence
1513 of the desired name as a file-level static, then do psymtab-to-symtab
1514 conversion on the fly and return the found symbol.
1517 ALL_SYMTABS (objfile, s)
1519 bv = BLOCKVECTOR (s);
1520 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1521 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1522 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1524 return SYMBOL_TYPE (sym);
1528 ALL_PSYMTABS (objfile, ps)
1530 if (!ps->readin && lookup_partial_symbol (ps, name, NULL, 0, STRUCT_DOMAIN))
1532 s = PSYMTAB_TO_SYMTAB (ps);
1533 bv = BLOCKVECTOR (s);
1534 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1535 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1538 /* This shouldn't be necessary, but as a last resort
1539 * try looking in the globals even though the psymtab
1540 * claimed the symbol was static. It's possible that
1541 * the psymtab gets it wrong in some cases.
1543 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1544 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1546 error ("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1547 %s may be an inlined function, or may be a template function\n\
1548 (if a template, try specifying an instantiation: %s<type>).",
1549 name, ps->filename, name, name);
1551 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1552 return SYMBOL_TYPE (sym);
1555 return (struct type *) 0;
1559 /* Find the psymtab containing main(). */
1560 /* FIXME: What about languages without main() or specially linked
1561 executables that have no main() ? */
1563 struct partial_symtab *
1564 find_main_psymtab (void)
1566 register struct partial_symtab *pst;
1567 register struct objfile *objfile;
1569 ALL_PSYMTABS (objfile, pst)
1571 if (lookup_partial_symbol (pst, main_name (), NULL, 1, VAR_DOMAIN))
1579 /* Search BLOCK for symbol NAME in DOMAIN.
1581 Note that if NAME is the demangled form of a C++ symbol, we will fail
1582 to find a match during the binary search of the non-encoded names, but
1583 for now we don't worry about the slight inefficiency of looking for
1584 a match we'll never find, since it will go pretty quick. Once the
1585 binary search terminates, we drop through and do a straight linear
1586 search on the symbols. Each symbol which is marked as being a ObjC/C++
1587 symbol (language_cplus or language_objc set) has both the encoded and
1588 non-encoded names tested for a match.
1590 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1591 particular mangled name.
1595 lookup_block_symbol (register const struct block *block, const char *name,
1596 const char *linkage_name,
1597 const domain_enum domain)
1599 register int bot, top, inc;
1600 register struct symbol *sym;
1601 register struct symbol *sym_found = NULL;
1602 register int do_linear_search = 1;
1604 if (BLOCK_HASHTABLE (block))
1606 unsigned int hash_index;
1607 hash_index = msymbol_hash_iw (name);
1608 hash_index = hash_index % BLOCK_BUCKETS (block);
1609 for (sym = BLOCK_BUCKET (block, hash_index); sym; sym = sym->hash_next)
1611 if (SYMBOL_DOMAIN (sym) == domain
1613 ? strcmp (DEPRECATED_SYMBOL_NAME (sym), linkage_name) == 0
1614 : SYMBOL_MATCHES_NATURAL_NAME (sym, name)))
1620 /* If the blocks's symbols were sorted, start with a binary search. */
1622 if (BLOCK_SHOULD_SORT (block))
1624 /* Reset the linear search flag so if the binary search fails, we
1625 won't do the linear search once unless we find some reason to
1628 do_linear_search = 0;
1629 top = BLOCK_NSYMS (block);
1632 /* Advance BOT to not far before the first symbol whose name is NAME. */
1636 inc = (top - bot + 1);
1637 /* No need to keep binary searching for the last few bits worth. */
1642 inc = (inc >> 1) + bot;
1643 sym = BLOCK_SYM (block, inc);
1644 if (!do_linear_search && (SYMBOL_LANGUAGE (sym) == language_java))
1646 do_linear_search = 1;
1648 if (SYMBOL_NATURAL_NAME (sym)[0] < name[0])
1652 else if (SYMBOL_NATURAL_NAME (sym)[0] > name[0])
1656 else if (strcmp (SYMBOL_NATURAL_NAME (sym), name) < 0)
1666 /* Now scan forward until we run out of symbols, find one whose
1667 name is greater than NAME, or find one we want. If there is
1668 more than one symbol with the right name and domain, we
1669 return the first one; I believe it is now impossible for us
1670 to encounter two symbols with the same name and domain
1671 here, because blocks containing argument symbols are no
1672 longer sorted. The exception is for C++, where multiple functions
1673 (cloned constructors / destructors, in particular) can have
1674 the same demangled name. So if we have a particular
1675 mangled name to match, try to do so. */
1677 top = BLOCK_NSYMS (block);
1680 sym = BLOCK_SYM (block, bot);
1681 if (SYMBOL_DOMAIN (sym) == domain
1683 ? strcmp (DEPRECATED_SYMBOL_NAME (sym), linkage_name) == 0
1684 : SYMBOL_MATCHES_NATURAL_NAME (sym, name)))
1688 if (SYMBOL_PRINT_NAME (sym)[0] > name[0])
1696 /* Here if block isn't sorted, or we fail to find a match during the
1697 binary search above. If during the binary search above, we find a
1698 symbol which is a Java symbol, then we have re-enabled the linear
1699 search flag which was reset when starting the binary search.
1701 This loop is equivalent to the loop above, but hacked greatly for speed.
1703 Note that parameter symbols do not always show up last in the
1704 list; this loop makes sure to take anything else other than
1705 parameter symbols first; it only uses parameter symbols as a
1706 last resort. Note that this only takes up extra computation
1709 if (do_linear_search)
1711 top = BLOCK_NSYMS (block);
1715 sym = BLOCK_SYM (block, bot);
1716 if (SYMBOL_DOMAIN (sym) == domain
1718 ? strcmp (DEPRECATED_SYMBOL_NAME (sym), linkage_name) == 0
1719 : SYMBOL_MATCHES_NATURAL_NAME (sym, name)))
1721 /* If SYM has aliases, then use any alias that is active
1722 at the current PC. If no alias is active at the current
1723 PC, then use the main symbol.
1725 ?!? Is checking the current pc correct? Is this routine
1726 ever called to look up a symbol from another context?
1728 FIXME: No, it's not correct. If someone sets a
1729 conditional breakpoint at an address, then the
1730 breakpoint's `struct expression' should refer to the
1731 `struct symbol' appropriate for the breakpoint's
1732 address, which may not be the PC.
1734 Even if it were never called from another context,
1735 it's totally bizarre for lookup_symbol's behavior to
1736 depend on the value of the inferior's current PC. We
1737 should pass in the appropriate PC as well as the
1738 block. The interface to lookup_symbol should change
1739 to require the caller to provide a PC. */
1741 if (SYMBOL_ALIASES (sym))
1742 sym = find_active_alias (sym, read_pc ());
1745 if (SYMBOL_CLASS (sym) != LOC_ARG &&
1746 SYMBOL_CLASS (sym) != LOC_LOCAL_ARG &&
1747 SYMBOL_CLASS (sym) != LOC_REF_ARG &&
1748 SYMBOL_CLASS (sym) != LOC_REGPARM &&
1749 SYMBOL_CLASS (sym) != LOC_REGPARM_ADDR &&
1750 SYMBOL_CLASS (sym) != LOC_BASEREG_ARG &&
1751 SYMBOL_CLASS (sym) != LOC_COMPUTED_ARG)
1759 return (sym_found); /* Will be NULL if not found. */
1762 /* Given a main symbol SYM and ADDR, search through the alias
1763 list to determine if an alias is active at ADDR and return
1766 If no alias is active, then return SYM. */
1768 static struct symbol *
1769 find_active_alias (struct symbol *sym, CORE_ADDR addr)
1771 struct range_list *r;
1772 struct alias_list *aliases;
1774 /* If we have aliases, check them first. */
1775 aliases = SYMBOL_ALIASES (sym);
1779 if (!SYMBOL_RANGES (aliases->sym))
1780 return aliases->sym;
1781 for (r = SYMBOL_RANGES (aliases->sym); r; r = r->next)
1783 if (r->start <= addr && r->end > addr)
1784 return aliases->sym;
1786 aliases = aliases->next;
1789 /* Nothing found, return the main symbol. */
1794 /* Find the symtab associated with PC and SECTION. Look through the
1795 psymtabs and read in another symtab if necessary. */
1798 find_pc_sect_symtab (CORE_ADDR pc, asection *section)
1800 register struct block *b;
1801 struct blockvector *bv;
1802 register struct symtab *s = NULL;
1803 register struct symtab *best_s = NULL;
1804 register struct partial_symtab *ps;
1805 register struct objfile *objfile;
1806 CORE_ADDR distance = 0;
1807 struct minimal_symbol *msymbol;
1809 /* If we know that this is not a text address, return failure. This is
1810 necessary because we loop based on the block's high and low code
1811 addresses, which do not include the data ranges, and because
1812 we call find_pc_sect_psymtab which has a similar restriction based
1813 on the partial_symtab's texthigh and textlow. */
1814 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
1816 && (msymbol->type == mst_data
1817 || msymbol->type == mst_bss
1818 || msymbol->type == mst_abs
1819 || msymbol->type == mst_file_data
1820 || msymbol->type == mst_file_bss))
1823 /* Search all symtabs for the one whose file contains our address, and which
1824 is the smallest of all the ones containing the address. This is designed
1825 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1826 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1827 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1829 This happens for native ecoff format, where code from included files
1830 gets its own symtab. The symtab for the included file should have
1831 been read in already via the dependency mechanism.
1832 It might be swifter to create several symtabs with the same name
1833 like xcoff does (I'm not sure).
1835 It also happens for objfiles that have their functions reordered.
1836 For these, the symtab we are looking for is not necessarily read in. */
1838 ALL_SYMTABS (objfile, s)
1840 bv = BLOCKVECTOR (s);
1841 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1843 if (BLOCK_START (b) <= pc
1844 && BLOCK_END (b) > pc
1846 || BLOCK_END (b) - BLOCK_START (b) < distance))
1848 /* For an objfile that has its functions reordered,
1849 find_pc_psymtab will find the proper partial symbol table
1850 and we simply return its corresponding symtab. */
1851 /* In order to better support objfiles that contain both
1852 stabs and coff debugging info, we continue on if a psymtab
1854 if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs)
1856 ps = find_pc_sect_psymtab (pc, section);
1858 return PSYMTAB_TO_SYMTAB (ps);
1863 struct symbol *sym = NULL;
1865 ALL_BLOCK_SYMBOLS (b, i, sym)
1867 fixup_symbol_section (sym, objfile);
1868 if (section == SYMBOL_BFD_SECTION (sym))
1871 if ((i >= BLOCK_BUCKETS (b)) && (sym == NULL))
1872 continue; /* no symbol in this symtab matches section */
1874 distance = BLOCK_END (b) - BLOCK_START (b);
1883 ps = find_pc_sect_psymtab (pc, section);
1887 /* Might want to error() here (in case symtab is corrupt and
1888 will cause a core dump), but maybe we can successfully
1889 continue, so let's not. */
1891 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n",
1893 s = PSYMTAB_TO_SYMTAB (ps);
1898 /* Find the symtab associated with PC. Look through the psymtabs and
1899 read in another symtab if necessary. Backward compatibility, no section */
1902 find_pc_symtab (CORE_ADDR pc)
1904 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
1908 /* Find the source file and line number for a given PC value and SECTION.
1909 Return a structure containing a symtab pointer, a line number,
1910 and a pc range for the entire source line.
1911 The value's .pc field is NOT the specified pc.
1912 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1913 use the line that ends there. Otherwise, in that case, the line
1914 that begins there is used. */
1916 /* The big complication here is that a line may start in one file, and end just
1917 before the start of another file. This usually occurs when you #include
1918 code in the middle of a subroutine. To properly find the end of a line's PC
1919 range, we must search all symtabs associated with this compilation unit, and
1920 find the one whose first PC is closer than that of the next line in this
1923 /* If it's worth the effort, we could be using a binary search. */
1925 struct symtab_and_line
1926 find_pc_sect_line (CORE_ADDR pc, struct sec *section, int notcurrent)
1929 register struct linetable *l;
1932 register struct linetable_entry *item;
1933 struct symtab_and_line val;
1934 struct blockvector *bv;
1935 struct minimal_symbol *msymbol;
1936 struct minimal_symbol *mfunsym;
1938 /* Info on best line seen so far, and where it starts, and its file. */
1940 struct linetable_entry *best = NULL;
1941 CORE_ADDR best_end = 0;
1942 struct symtab *best_symtab = 0;
1944 /* Store here the first line number
1945 of a file which contains the line at the smallest pc after PC.
1946 If we don't find a line whose range contains PC,
1947 we will use a line one less than this,
1948 with a range from the start of that file to the first line's pc. */
1949 struct linetable_entry *alt = NULL;
1950 struct symtab *alt_symtab = 0;
1952 /* Info on best line seen in this file. */
1954 struct linetable_entry *prev;
1956 /* If this pc is not from the current frame,
1957 it is the address of the end of a call instruction.
1958 Quite likely that is the start of the following statement.
1959 But what we want is the statement containing the instruction.
1960 Fudge the pc to make sure we get that. */
1962 init_sal (&val); /* initialize to zeroes */
1964 /* It's tempting to assume that, if we can't find debugging info for
1965 any function enclosing PC, that we shouldn't search for line
1966 number info, either. However, GAS can emit line number info for
1967 assembly files --- very helpful when debugging hand-written
1968 assembly code. In such a case, we'd have no debug info for the
1969 function, but we would have line info. */
1974 /* elz: added this because this function returned the wrong
1975 information if the pc belongs to a stub (import/export)
1976 to call a shlib function. This stub would be anywhere between
1977 two functions in the target, and the line info was erroneously
1978 taken to be the one of the line before the pc.
1980 /* RT: Further explanation:
1982 * We have stubs (trampolines) inserted between procedures.
1984 * Example: "shr1" exists in a shared library, and a "shr1" stub also
1985 * exists in the main image.
1987 * In the minimal symbol table, we have a bunch of symbols
1988 * sorted by start address. The stubs are marked as "trampoline",
1989 * the others appear as text. E.g.:
1991 * Minimal symbol table for main image
1992 * main: code for main (text symbol)
1993 * shr1: stub (trampoline symbol)
1994 * foo: code for foo (text symbol)
1996 * Minimal symbol table for "shr1" image:
1998 * shr1: code for shr1 (text symbol)
2001 * So the code below is trying to detect if we are in the stub
2002 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2003 * and if found, do the symbolization from the real-code address
2004 * rather than the stub address.
2006 * Assumptions being made about the minimal symbol table:
2007 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2008 * if we're really in the trampoline. If we're beyond it (say
2009 * we're in "foo" in the above example), it'll have a closer
2010 * symbol (the "foo" text symbol for example) and will not
2011 * return the trampoline.
2012 * 2. lookup_minimal_symbol_text() will find a real text symbol
2013 * corresponding to the trampoline, and whose address will
2014 * be different than the trampoline address. I put in a sanity
2015 * check for the address being the same, to avoid an
2016 * infinite recursion.
2018 msymbol = lookup_minimal_symbol_by_pc (pc);
2019 if (msymbol != NULL)
2020 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2022 mfunsym = lookup_minimal_symbol_text (DEPRECATED_SYMBOL_NAME (msymbol), NULL, NULL);
2023 if (mfunsym == NULL)
2024 /* I eliminated this warning since it is coming out
2025 * in the following situation:
2026 * gdb shmain // test program with shared libraries
2027 * (gdb) break shr1 // function in shared lib
2028 * Warning: In stub for ...
2029 * In the above situation, the shared lib is not loaded yet,
2030 * so of course we can't find the real func/line info,
2031 * but the "break" still works, and the warning is annoying.
2032 * So I commented out the warning. RT */
2033 /* warning ("In stub for %s; unable to find real function/line info", DEPRECATED_SYMBOL_NAME (msymbol)) */ ;
2035 else if (SYMBOL_VALUE (mfunsym) == SYMBOL_VALUE (msymbol))
2036 /* Avoid infinite recursion */
2037 /* See above comment about why warning is commented out */
2038 /* warning ("In stub for %s; unable to find real function/line info", DEPRECATED_SYMBOL_NAME (msymbol)) */ ;
2041 return find_pc_line (SYMBOL_VALUE (mfunsym), 0);
2045 s = find_pc_sect_symtab (pc, section);
2048 /* if no symbol information, return previous pc */
2055 bv = BLOCKVECTOR (s);
2057 /* Look at all the symtabs that share this blockvector.
2058 They all have the same apriori range, that we found was right;
2059 but they have different line tables. */
2061 for (; s && BLOCKVECTOR (s) == bv; s = s->next)
2063 /* Find the best line in this symtab. */
2070 /* I think len can be zero if the symtab lacks line numbers
2071 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2072 I'm not sure which, and maybe it depends on the symbol
2078 item = l->item; /* Get first line info */
2080 /* Is this file's first line closer than the first lines of other files?
2081 If so, record this file, and its first line, as best alternate. */
2082 if (item->pc > pc && (!alt || item->pc < alt->pc))
2088 for (i = 0; i < len; i++, item++)
2090 /* Leave prev pointing to the linetable entry for the last line
2091 that started at or before PC. */
2098 /* At this point, prev points at the line whose start addr is <= pc, and
2099 item points at the next line. If we ran off the end of the linetable
2100 (pc >= start of the last line), then prev == item. If pc < start of
2101 the first line, prev will not be set. */
2103 /* Is this file's best line closer than the best in the other files?
2104 If so, record this file, and its best line, as best so far. Don't
2105 save prev if it represents the end of a function (i.e. line number
2106 0) instead of a real line. */
2108 if (prev && prev->line && (!best || prev->pc > best->pc))
2113 /* Discard BEST_END if it's before the PC of the current BEST. */
2114 if (best_end <= best->pc)
2118 /* If another line (denoted by ITEM) is in the linetable and its
2119 PC is after BEST's PC, but before the current BEST_END, then
2120 use ITEM's PC as the new best_end. */
2121 if (best && i < len && item->pc > best->pc
2122 && (best_end == 0 || best_end > item->pc))
2123 best_end = item->pc;
2129 { /* If we didn't find any line # info, just
2135 val.symtab = alt_symtab;
2136 val.line = alt->line - 1;
2138 /* Don't return line 0, that means that we didn't find the line. */
2142 val.pc = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2146 else if (best->line == 0)
2148 /* If our best fit is in a range of PC's for which no line
2149 number info is available (line number is zero) then we didn't
2150 find any valid line information. */
2155 val.symtab = best_symtab;
2156 val.line = best->line;
2158 if (best_end && (!alt || best_end < alt->pc))
2163 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2165 val.section = section;
2169 /* Backward compatibility (no section) */
2171 struct symtab_and_line
2172 find_pc_line (CORE_ADDR pc, int notcurrent)
2176 section = find_pc_overlay (pc);
2177 if (pc_in_unmapped_range (pc, section))
2178 pc = overlay_mapped_address (pc, section);
2179 return find_pc_sect_line (pc, section, notcurrent);
2182 /* Find line number LINE in any symtab whose name is the same as
2185 If found, return the symtab that contains the linetable in which it was
2186 found, set *INDEX to the index in the linetable of the best entry
2187 found, and set *EXACT_MATCH nonzero if the value returned is an
2190 If not found, return NULL. */
2193 find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match)
2197 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2201 struct linetable *best_linetable;
2202 struct symtab *best_symtab;
2204 /* First try looking it up in the given symtab. */
2205 best_linetable = LINETABLE (symtab);
2206 best_symtab = symtab;
2207 best_index = find_line_common (best_linetable, line, &exact);
2208 if (best_index < 0 || !exact)
2210 /* Didn't find an exact match. So we better keep looking for
2211 another symtab with the same name. In the case of xcoff,
2212 multiple csects for one source file (produced by IBM's FORTRAN
2213 compiler) produce multiple symtabs (this is unavoidable
2214 assuming csects can be at arbitrary places in memory and that
2215 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2217 /* BEST is the smallest linenumber > LINE so far seen,
2218 or 0 if none has been seen so far.
2219 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2222 struct objfile *objfile;
2225 if (best_index >= 0)
2226 best = best_linetable->item[best_index].line;
2230 ALL_SYMTABS (objfile, s)
2232 struct linetable *l;
2235 if (!STREQ (symtab->filename, s->filename))
2238 ind = find_line_common (l, line, &exact);
2248 if (best == 0 || l->item[ind].line < best)
2250 best = l->item[ind].line;
2263 *index = best_index;
2265 *exact_match = exact;
2270 /* Set the PC value for a given source file and line number and return true.
2271 Returns zero for invalid line number (and sets the PC to 0).
2272 The source file is specified with a struct symtab. */
2275 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2277 struct linetable *l;
2284 symtab = find_line_symtab (symtab, line, &ind, NULL);
2287 l = LINETABLE (symtab);
2288 *pc = l->item[ind].pc;
2295 /* Find the range of pc values in a line.
2296 Store the starting pc of the line into *STARTPTR
2297 and the ending pc (start of next line) into *ENDPTR.
2298 Returns 1 to indicate success.
2299 Returns 0 if could not find the specified line. */
2302 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2305 CORE_ADDR startaddr;
2306 struct symtab_and_line found_sal;
2309 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2312 /* This whole function is based on address. For example, if line 10 has
2313 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2314 "info line *0x123" should say the line goes from 0x100 to 0x200
2315 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2316 This also insures that we never give a range like "starts at 0x134
2317 and ends at 0x12c". */
2319 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2320 if (found_sal.line != sal.line)
2322 /* The specified line (sal) has zero bytes. */
2323 *startptr = found_sal.pc;
2324 *endptr = found_sal.pc;
2328 *startptr = found_sal.pc;
2329 *endptr = found_sal.end;
2334 /* Given a line table and a line number, return the index into the line
2335 table for the pc of the nearest line whose number is >= the specified one.
2336 Return -1 if none is found. The value is >= 0 if it is an index.
2338 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2341 find_line_common (register struct linetable *l, register int lineno,
2347 /* BEST is the smallest linenumber > LINENO so far seen,
2348 or 0 if none has been seen so far.
2349 BEST_INDEX identifies the item for it. */
2351 int best_index = -1;
2360 for (i = 0; i < len; i++)
2362 register struct linetable_entry *item = &(l->item[i]);
2364 if (item->line == lineno)
2366 /* Return the first (lowest address) entry which matches. */
2371 if (item->line > lineno && (best == 0 || item->line < best))
2378 /* If we got here, we didn't get an exact match. */
2385 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2387 struct symtab_and_line sal;
2388 sal = find_pc_line (pc, 0);
2391 return sal.symtab != 0;
2394 /* Given a function symbol SYM, find the symtab and line for the start
2396 If the argument FUNFIRSTLINE is nonzero, we want the first line
2397 of real code inside the function. */
2399 struct symtab_and_line
2400 find_function_start_sal (struct symbol *sym, int funfirstline)
2403 struct symtab_and_line sal;
2405 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2406 fixup_symbol_section (sym, NULL);
2408 { /* skip "first line" of function (which is actually its prologue) */
2409 asection *section = SYMBOL_BFD_SECTION (sym);
2410 /* If function is in an unmapped overlay, use its unmapped LMA
2411 address, so that SKIP_PROLOGUE has something unique to work on */
2412 if (section_is_overlay (section) &&
2413 !section_is_mapped (section))
2414 pc = overlay_unmapped_address (pc, section);
2416 pc += FUNCTION_START_OFFSET;
2417 pc = SKIP_PROLOGUE (pc);
2419 /* For overlays, map pc back into its mapped VMA range */
2420 pc = overlay_mapped_address (pc, section);
2422 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2424 #ifdef PROLOGUE_FIRSTLINE_OVERLAP
2425 /* Convex: no need to suppress code on first line, if any */
2428 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
2429 line is still part of the same function. */
2431 && BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= sal.end
2432 && sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2434 /* First pc of next line */
2436 /* Recalculate the line number (might not be N+1). */
2437 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2445 /* If P is of the form "operator[ \t]+..." where `...' is
2446 some legitimate operator text, return a pointer to the
2447 beginning of the substring of the operator text.
2448 Otherwise, return "". */
2450 operator_chars (char *p, char **end)
2453 if (strncmp (p, "operator", 8))
2457 /* Don't get faked out by `operator' being part of a longer
2459 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2462 /* Allow some whitespace between `operator' and the operator symbol. */
2463 while (*p == ' ' || *p == '\t')
2466 /* Recognize 'operator TYPENAME'. */
2468 if (isalpha (*p) || *p == '_' || *p == '$')
2470 register char *q = p + 1;
2471 while (isalnum (*q) || *q == '_' || *q == '$')
2480 case '\\': /* regexp quoting */
2483 if (p[2] == '=') /* 'operator\*=' */
2485 else /* 'operator\*' */
2489 else if (p[1] == '[')
2492 error ("mismatched quoting on brackets, try 'operator\\[\\]'");
2493 else if (p[2] == '\\' && p[3] == ']')
2495 *end = p + 4; /* 'operator\[\]' */
2499 error ("nothing is allowed between '[' and ']'");
2503 /* Gratuitous qoute: skip it and move on. */
2525 if (p[0] == '-' && p[1] == '>')
2527 /* Struct pointer member operator 'operator->'. */
2530 *end = p + 3; /* 'operator->*' */
2533 else if (p[2] == '\\')
2535 *end = p + 4; /* Hopefully 'operator->\*' */
2540 *end = p + 2; /* 'operator->' */
2544 if (p[1] == '=' || p[1] == p[0])
2555 error ("`operator ()' must be specified without whitespace in `()'");
2560 error ("`operator ?:' must be specified without whitespace in `?:'");
2565 error ("`operator []' must be specified without whitespace in `[]'");
2569 error ("`operator %s' not supported", p);
2578 /* If FILE is not already in the table of files, return zero;
2579 otherwise return non-zero. Optionally add FILE to the table if ADD
2580 is non-zero. If *FIRST is non-zero, forget the old table
2583 filename_seen (const char *file, int add, int *first)
2585 /* Table of files seen so far. */
2586 static const char **tab = NULL;
2587 /* Allocated size of tab in elements.
2588 Start with one 256-byte block (when using GNU malloc.c).
2589 24 is the malloc overhead when range checking is in effect. */
2590 static int tab_alloc_size = (256 - 24) / sizeof (char *);
2591 /* Current size of tab in elements. */
2592 static int tab_cur_size;
2598 tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
2602 /* Is FILE in tab? */
2603 for (p = tab; p < tab + tab_cur_size; p++)
2604 if (strcmp (*p, file) == 0)
2607 /* No; maybe add it to tab. */
2610 if (tab_cur_size == tab_alloc_size)
2612 tab_alloc_size *= 2;
2613 tab = (const char **) xrealloc ((char *) tab,
2614 tab_alloc_size * sizeof (*tab));
2616 tab[tab_cur_size++] = file;
2622 /* Slave routine for sources_info. Force line breaks at ,'s.
2623 NAME is the name to print and *FIRST is nonzero if this is the first
2624 name printed. Set *FIRST to zero. */
2626 output_source_filename (char *name, int *first)
2628 /* Since a single source file can result in several partial symbol
2629 tables, we need to avoid printing it more than once. Note: if
2630 some of the psymtabs are read in and some are not, it gets
2631 printed both under "Source files for which symbols have been
2632 read" and "Source files for which symbols will be read in on
2633 demand". I consider this a reasonable way to deal with the
2634 situation. I'm not sure whether this can also happen for
2635 symtabs; it doesn't hurt to check. */
2637 /* Was NAME already seen? */
2638 if (filename_seen (name, 1, first))
2640 /* Yes; don't print it again. */
2643 /* No; print it and reset *FIRST. */
2650 printf_filtered (", ");
2654 fputs_filtered (name, gdb_stdout);
2658 sources_info (char *ignore, int from_tty)
2660 register struct symtab *s;
2661 register struct partial_symtab *ps;
2662 register struct objfile *objfile;
2665 if (!have_full_symbols () && !have_partial_symbols ())
2667 error ("No symbol table is loaded. Use the \"file\" command.");
2670 printf_filtered ("Source files for which symbols have been read in:\n\n");
2673 ALL_SYMTABS (objfile, s)
2675 output_source_filename (s->filename, &first);
2677 printf_filtered ("\n\n");
2679 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2682 ALL_PSYMTABS (objfile, ps)
2686 output_source_filename (ps->filename, &first);
2689 printf_filtered ("\n");
2693 file_matches (char *file, char *files[], int nfiles)
2697 if (file != NULL && nfiles != 0)
2699 for (i = 0; i < nfiles; i++)
2701 if (strcmp (files[i], lbasename (file)) == 0)
2705 else if (nfiles == 0)
2710 /* Free any memory associated with a search. */
2712 free_search_symbols (struct symbol_search *symbols)
2714 struct symbol_search *p;
2715 struct symbol_search *next;
2717 for (p = symbols; p != NULL; p = next)
2725 do_free_search_symbols_cleanup (void *symbols)
2727 free_search_symbols (symbols);
2731 make_cleanup_free_search_symbols (struct symbol_search *symbols)
2733 return make_cleanup (do_free_search_symbols_cleanup, symbols);
2736 /* Helper function for sort_search_symbols and qsort. Can only
2737 sort symbols, not minimal symbols. */
2739 compare_search_syms (const void *sa, const void *sb)
2741 struct symbol_search **sym_a = (struct symbol_search **) sa;
2742 struct symbol_search **sym_b = (struct symbol_search **) sb;
2744 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
2745 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
2748 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2749 prevtail where it is, but update its next pointer to point to
2750 the first of the sorted symbols. */
2751 static struct symbol_search *
2752 sort_search_symbols (struct symbol_search *prevtail, int nfound)
2754 struct symbol_search **symbols, *symp, *old_next;
2757 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
2759 symp = prevtail->next;
2760 for (i = 0; i < nfound; i++)
2765 /* Generally NULL. */
2768 qsort (symbols, nfound, sizeof (struct symbol_search *),
2769 compare_search_syms);
2772 for (i = 0; i < nfound; i++)
2774 symp->next = symbols[i];
2777 symp->next = old_next;
2783 /* Search the symbol table for matches to the regular expression REGEXP,
2784 returning the results in *MATCHES.
2786 Only symbols of KIND are searched:
2787 FUNCTIONS_DOMAIN - search all functions
2788 TYPES_DOMAIN - search all type names
2789 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2790 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2791 and constants (enums)
2793 free_search_symbols should be called when *MATCHES is no longer needed.
2795 The results are sorted locally; each symtab's global and static blocks are
2796 separately alphabetized.
2799 search_symbols (char *regexp, domain_enum kind, int nfiles, char *files[],
2800 struct symbol_search **matches)
2802 register struct symtab *s;
2803 register struct partial_symtab *ps;
2804 register struct blockvector *bv;
2805 struct blockvector *prev_bv = 0;
2806 register struct block *b;
2809 register struct symbol *sym;
2810 struct partial_symbol **psym;
2811 struct objfile *objfile;
2812 struct minimal_symbol *msymbol;
2815 static enum minimal_symbol_type types[]
2817 {mst_data, mst_text, mst_abs, mst_unknown};
2818 static enum minimal_symbol_type types2[]
2820 {mst_bss, mst_file_text, mst_abs, mst_unknown};
2821 static enum minimal_symbol_type types3[]
2823 {mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
2824 static enum minimal_symbol_type types4[]
2826 {mst_file_bss, mst_text, mst_abs, mst_unknown};
2827 enum minimal_symbol_type ourtype;
2828 enum minimal_symbol_type ourtype2;
2829 enum minimal_symbol_type ourtype3;
2830 enum minimal_symbol_type ourtype4;
2831 struct symbol_search *sr;
2832 struct symbol_search *psr;
2833 struct symbol_search *tail;
2834 struct cleanup *old_chain = NULL;
2836 if (kind < VARIABLES_DOMAIN)
2837 error ("must search on specific domain");
2839 ourtype = types[(int) (kind - VARIABLES_DOMAIN)];
2840 ourtype2 = types2[(int) (kind - VARIABLES_DOMAIN)];
2841 ourtype3 = types3[(int) (kind - VARIABLES_DOMAIN)];
2842 ourtype4 = types4[(int) (kind - VARIABLES_DOMAIN)];
2844 sr = *matches = NULL;
2849 /* Make sure spacing is right for C++ operators.
2850 This is just a courtesy to make the matching less sensitive
2851 to how many spaces the user leaves between 'operator'
2852 and <TYPENAME> or <OPERATOR>. */
2854 char *opname = operator_chars (regexp, &opend);
2857 int fix = -1; /* -1 means ok; otherwise number of spaces needed. */
2858 if (isalpha (*opname) || *opname == '_' || *opname == '$')
2860 /* There should 1 space between 'operator' and 'TYPENAME'. */
2861 if (opname[-1] != ' ' || opname[-2] == ' ')
2866 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
2867 if (opname[-1] == ' ')
2870 /* If wrong number of spaces, fix it. */
2873 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
2874 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
2879 if (0 != (val = re_comp (regexp)))
2880 error ("Invalid regexp (%s): %s", val, regexp);
2883 /* Search through the partial symtabs *first* for all symbols
2884 matching the regexp. That way we don't have to reproduce all of
2885 the machinery below. */
2887 ALL_PSYMTABS (objfile, ps)
2889 struct partial_symbol **bound, **gbound, **sbound;
2895 gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms;
2896 sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms;
2899 /* Go through all of the symbols stored in a partial
2900 symtab in one loop. */
2901 psym = objfile->global_psymbols.list + ps->globals_offset;
2906 if (bound == gbound && ps->n_static_syms != 0)
2908 psym = objfile->static_psymbols.list + ps->statics_offset;
2919 /* If it would match (logic taken from loop below)
2920 load the file and go on to the next one */
2921 if (file_matches (ps->filename, files, nfiles)
2923 || re_exec (SYMBOL_NATURAL_NAME (*psym)) != 0)
2924 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (*psym) != LOC_TYPEDEF
2925 && SYMBOL_CLASS (*psym) != LOC_BLOCK)
2926 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK)
2927 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (*psym) == LOC_TYPEDEF)
2928 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK))))
2930 PSYMTAB_TO_SYMTAB (ps);
2938 /* Here, we search through the minimal symbol tables for functions
2939 and variables that match, and force their symbols to be read.
2940 This is in particular necessary for demangled variable names,
2941 which are no longer put into the partial symbol tables.
2942 The symbol will then be found during the scan of symtabs below.
2944 For functions, find_pc_symtab should succeed if we have debug info
2945 for the function, for variables we have to call lookup_symbol
2946 to determine if the variable has debug info.
2947 If the lookup fails, set found_misc so that we will rescan to print
2948 any matching symbols without debug info.
2951 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
2953 ALL_MSYMBOLS (objfile, msymbol)
2955 if (MSYMBOL_TYPE (msymbol) == ourtype ||
2956 MSYMBOL_TYPE (msymbol) == ourtype2 ||
2957 MSYMBOL_TYPE (msymbol) == ourtype3 ||
2958 MSYMBOL_TYPE (msymbol) == ourtype4)
2961 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
2963 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
2965 /* FIXME: carlton/2003-02-04: Given that the
2966 semantics of lookup_symbol keeps on changing
2967 slightly, it would be a nice idea if we had a
2968 function lookup_symbol_minsym that found the
2969 symbol associated to a given minimal symbol (if
2971 if (kind == FUNCTIONS_DOMAIN
2972 || lookup_symbol (DEPRECATED_SYMBOL_NAME (msymbol),
2973 (struct block *) NULL,
2975 0, (struct symtab **) NULL) == NULL)
2983 ALL_SYMTABS (objfile, s)
2985 bv = BLOCKVECTOR (s);
2986 /* Often many files share a blockvector.
2987 Scan each blockvector only once so that
2988 we don't get every symbol many times.
2989 It happens that the first symtab in the list
2990 for any given blockvector is the main file. */
2992 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
2994 struct symbol_search *prevtail = tail;
2996 b = BLOCKVECTOR_BLOCK (bv, i);
2997 ALL_BLOCK_SYMBOLS (b, j, sym)
3000 if (file_matches (s->filename, files, nfiles)
3002 || re_exec (SYMBOL_NATURAL_NAME (sym)) != 0)
3003 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3004 && SYMBOL_CLASS (sym) != LOC_BLOCK
3005 && SYMBOL_CLASS (sym) != LOC_CONST)
3006 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK)
3007 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3008 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK))))
3011 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3015 psr->msymbol = NULL;
3027 if (prevtail == NULL)
3029 struct symbol_search dummy;
3032 tail = sort_search_symbols (&dummy, nfound);
3035 old_chain = make_cleanup_free_search_symbols (sr);
3038 tail = sort_search_symbols (prevtail, nfound);
3044 /* If there are no eyes, avoid all contact. I mean, if there are
3045 no debug symbols, then print directly from the msymbol_vector. */
3047 if (found_misc || kind != FUNCTIONS_DOMAIN)
3049 ALL_MSYMBOLS (objfile, msymbol)
3051 if (MSYMBOL_TYPE (msymbol) == ourtype ||
3052 MSYMBOL_TYPE (msymbol) == ourtype2 ||
3053 MSYMBOL_TYPE (msymbol) == ourtype3 ||
3054 MSYMBOL_TYPE (msymbol) == ourtype4)
3057 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
3059 /* Functions: Look up by address. */
3060 if (kind != FUNCTIONS_DOMAIN ||
3061 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
3063 /* Variables/Absolutes: Look up by name */
3064 if (lookup_symbol (DEPRECATED_SYMBOL_NAME (msymbol),
3065 (struct block *) NULL, VAR_DOMAIN,
3066 0, (struct symtab **) NULL) == NULL)
3069 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3071 psr->msymbol = msymbol;
3078 old_chain = make_cleanup_free_search_symbols (sr);
3092 discard_cleanups (old_chain);
3095 /* Helper function for symtab_symbol_info, this function uses
3096 the data returned from search_symbols() to print information
3097 regarding the match to gdb_stdout.
3100 print_symbol_info (domain_enum kind, struct symtab *s, struct symbol *sym,
3101 int block, char *last)
3103 if (last == NULL || strcmp (last, s->filename) != 0)
3105 fputs_filtered ("\nFile ", gdb_stdout);
3106 fputs_filtered (s->filename, gdb_stdout);
3107 fputs_filtered (":\n", gdb_stdout);
3110 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3111 printf_filtered ("static ");
3113 /* Typedef that is not a C++ class */
3114 if (kind == TYPES_DOMAIN
3115 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3116 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3117 /* variable, func, or typedef-that-is-c++-class */
3118 else if (kind < TYPES_DOMAIN ||
3119 (kind == TYPES_DOMAIN &&
3120 SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3122 type_print (SYMBOL_TYPE (sym),
3123 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3124 ? "" : SYMBOL_PRINT_NAME (sym)),
3127 printf_filtered (";\n");
3131 /* This help function for symtab_symbol_info() prints information
3132 for non-debugging symbols to gdb_stdout.
3135 print_msymbol_info (struct minimal_symbol *msymbol)
3139 if (TARGET_ADDR_BIT <= 32)
3140 tmp = local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3141 & (CORE_ADDR) 0xffffffff,
3144 tmp = local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3146 printf_filtered ("%s %s\n",
3147 tmp, SYMBOL_PRINT_NAME (msymbol));
3150 /* This is the guts of the commands "info functions", "info types", and
3151 "info variables". It calls search_symbols to find all matches and then
3152 print_[m]symbol_info to print out some useful information about the
3156 symtab_symbol_info (char *regexp, domain_enum kind, int from_tty)
3158 static char *classnames[]
3160 {"variable", "function", "type", "method"};
3161 struct symbol_search *symbols;
3162 struct symbol_search *p;
3163 struct cleanup *old_chain;
3164 char *last_filename = NULL;
3167 /* must make sure that if we're interrupted, symbols gets freed */
3168 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3169 old_chain = make_cleanup_free_search_symbols (symbols);
3171 printf_filtered (regexp
3172 ? "All %ss matching regular expression \"%s\":\n"
3173 : "All defined %ss:\n",
3174 classnames[(int) (kind - VARIABLES_DOMAIN)], regexp);
3176 for (p = symbols; p != NULL; p = p->next)
3180 if (p->msymbol != NULL)
3184 printf_filtered ("\nNon-debugging symbols:\n");
3187 print_msymbol_info (p->msymbol);
3191 print_symbol_info (kind,
3196 last_filename = p->symtab->filename;
3200 do_cleanups (old_chain);
3204 variables_info (char *regexp, int from_tty)
3206 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3210 functions_info (char *regexp, int from_tty)
3212 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3217 types_info (char *regexp, int from_tty)
3219 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3222 /* Breakpoint all functions matching regular expression. */
3225 rbreak_command_wrapper (char *regexp, int from_tty)
3227 rbreak_command (regexp, from_tty);
3231 rbreak_command (char *regexp, int from_tty)
3233 struct symbol_search *ss;
3234 struct symbol_search *p;
3235 struct cleanup *old_chain;
3237 search_symbols (regexp, FUNCTIONS_DOMAIN, 0, (char **) NULL, &ss);
3238 old_chain = make_cleanup_free_search_symbols (ss);
3240 for (p = ss; p != NULL; p = p->next)
3242 if (p->msymbol == NULL)
3244 char *string = (char *) alloca (strlen (p->symtab->filename)
3245 + strlen (DEPRECATED_SYMBOL_NAME (p->symbol))
3247 strcpy (string, p->symtab->filename);
3248 strcat (string, ":'");
3249 strcat (string, DEPRECATED_SYMBOL_NAME (p->symbol));
3250 strcat (string, "'");
3251 break_command (string, from_tty);
3252 print_symbol_info (FUNCTIONS_DOMAIN,
3256 p->symtab->filename);
3260 break_command (DEPRECATED_SYMBOL_NAME (p->msymbol), from_tty);
3261 printf_filtered ("<function, no debug info> %s;\n",
3262 SYMBOL_PRINT_NAME (p->msymbol));
3266 do_cleanups (old_chain);
3270 /* Helper routine for make_symbol_completion_list. */
3272 static int return_val_size;
3273 static int return_val_index;
3274 static char **return_val;
3276 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3278 if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) \
3279 /* Put only the mangled name on the list. */ \
3280 /* Advantage: "b foo<TAB>" completes to "b foo(int, int)" */ \
3281 /* Disadvantage: "b foo__i<TAB>" doesn't complete. */ \
3282 completion_list_add_name \
3283 (SYMBOL_DEMANGLED_NAME (symbol), (sym_text), (len), (text), (word)); \
3285 completion_list_add_name \
3286 (DEPRECATED_SYMBOL_NAME (symbol), (sym_text), (len), (text), (word)); \
3289 /* Test to see if the symbol specified by SYMNAME (which is already
3290 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3291 characters. If so, add it to the current completion list. */
3294 completion_list_add_name (char *symname, char *sym_text, int sym_text_len,
3295 char *text, char *word)
3300 /* clip symbols that cannot match */
3302 if (strncmp (symname, sym_text, sym_text_len) != 0)
3307 /* We have a match for a completion, so add SYMNAME to the current list
3308 of matches. Note that the name is moved to freshly malloc'd space. */
3312 if (word == sym_text)
3314 new = xmalloc (strlen (symname) + 5);
3315 strcpy (new, symname);
3317 else if (word > sym_text)
3319 /* Return some portion of symname. */
3320 new = xmalloc (strlen (symname) + 5);
3321 strcpy (new, symname + (word - sym_text));
3325 /* Return some of SYM_TEXT plus symname. */
3326 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
3327 strncpy (new, word, sym_text - word);
3328 new[sym_text - word] = '\0';
3329 strcat (new, symname);
3332 if (return_val_index + 3 > return_val_size)
3334 newsize = (return_val_size *= 2) * sizeof (char *);
3335 return_val = (char **) xrealloc ((char *) return_val, newsize);
3337 return_val[return_val_index++] = new;
3338 return_val[return_val_index] = NULL;
3342 /* ObjC: In case we are completing on a selector, look as the msymbol
3343 again and feed all the selectors into the mill. */
3346 completion_list_objc_symbol (struct minimal_symbol *msymbol, char *sym_text,
3347 int sym_text_len, char *text, char *word)
3349 static char *tmp = NULL;
3350 static unsigned int tmplen = 0;
3352 char *method, *category, *selector;
3355 method = SYMBOL_NATURAL_NAME (msymbol);
3357 /* Is it a method? */
3358 if ((method[0] != '-') && (method[0] != '+'))
3361 if (sym_text[0] == '[')
3362 /* Complete on shortened method method. */
3363 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
3365 while ((strlen (method) + 1) >= tmplen)
3371 tmp = xrealloc (tmp, tmplen);
3373 selector = strchr (method, ' ');
3374 if (selector != NULL)
3377 category = strchr (method, '(');
3379 if ((category != NULL) && (selector != NULL))
3381 memcpy (tmp, method, (category - method));
3382 tmp[category - method] = ' ';
3383 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
3384 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3385 if (sym_text[0] == '[')
3386 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
3389 if (selector != NULL)
3391 /* Complete on selector only. */
3392 strcpy (tmp, selector);
3393 tmp2 = strchr (tmp, ']');
3397 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3401 /* Break the non-quoted text based on the characters which are in
3402 symbols. FIXME: This should probably be language-specific. */
3405 language_search_unquoted_string (char *text, char *p)
3407 for (; p > text; --p)
3409 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3413 if ((current_language->la_language == language_objc))
3415 if (p[-1] == ':') /* might be part of a method name */
3417 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
3418 p -= 2; /* beginning of a method name */
3419 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
3420 { /* might be part of a method name */
3423 /* Seeing a ' ' or a '(' is not conclusive evidence
3424 that we are in the middle of a method name. However,
3425 finding "-[" or "+[" should be pretty un-ambiguous.
3426 Unfortunately we have to find it now to decide. */
3429 if (isalnum (t[-1]) || t[-1] == '_' ||
3430 t[-1] == ' ' || t[-1] == ':' ||
3431 t[-1] == '(' || t[-1] == ')')
3436 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
3437 p = t - 2; /* method name detected */
3438 /* else we leave with p unchanged */
3448 /* Return a NULL terminated array of all symbols (regardless of class)
3449 which begin by matching TEXT. If the answer is no symbols, then
3450 the return value is an array which contains only a NULL pointer.
3452 Problem: All of the symbols have to be copied because readline frees them.
3453 I'm not going to worry about this; hopefully there won't be that many. */
3456 make_symbol_completion_list (char *text, char *word)
3458 register struct symbol *sym;
3459 register struct symtab *s;
3460 register struct partial_symtab *ps;
3461 register struct minimal_symbol *msymbol;
3462 register struct objfile *objfile;
3463 register struct block *b, *surrounding_static_block = 0;
3465 struct partial_symbol **psym;
3466 /* The symbol we are completing on. Points in same buffer as text. */
3468 /* Length of sym_text. */
3471 /* Now look for the symbol we are supposed to complete on.
3472 FIXME: This should be language-specific. */
3476 char *quote_pos = NULL;
3478 /* First see if this is a quoted string. */
3480 for (p = text; *p != '\0'; ++p)
3482 if (quote_found != '\0')
3484 if (*p == quote_found)
3485 /* Found close quote. */
3487 else if (*p == '\\' && p[1] == quote_found)
3488 /* A backslash followed by the quote character
3489 doesn't end the string. */
3492 else if (*p == '\'' || *p == '"')
3498 if (quote_found == '\'')
3499 /* A string within single quotes can be a symbol, so complete on it. */
3500 sym_text = quote_pos + 1;
3501 else if (quote_found == '"')
3502 /* A double-quoted string is never a symbol, nor does it make sense
3503 to complete it any other way. */
3505 return_val = (char **) xmalloc (sizeof (char *));
3506 return_val[0] = NULL;
3511 /* It is not a quoted string. Break it based on the characters
3512 which are in symbols. */
3515 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3524 sym_text_len = strlen (sym_text);
3526 return_val_size = 100;
3527 return_val_index = 0;
3528 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3529 return_val[0] = NULL;
3531 /* Look through the partial symtabs for all symbols which begin
3532 by matching SYM_TEXT. Add each one that you find to the list. */
3534 ALL_PSYMTABS (objfile, ps)
3536 /* If the psymtab's been read in we'll get it when we search
3537 through the blockvector. */
3541 for (psym = objfile->global_psymbols.list + ps->globals_offset;
3542 psym < (objfile->global_psymbols.list + ps->globals_offset
3543 + ps->n_global_syms);
3546 /* If interrupted, then quit. */
3548 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3551 for (psym = objfile->static_psymbols.list + ps->statics_offset;
3552 psym < (objfile->static_psymbols.list + ps->statics_offset
3553 + ps->n_static_syms);
3557 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3561 /* At this point scan through the misc symbol vectors and add each
3562 symbol you find to the list. Eventually we want to ignore
3563 anything that isn't a text symbol (everything else will be
3564 handled by the psymtab code above). */
3566 ALL_MSYMBOLS (objfile, msymbol)
3569 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
3571 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
3574 /* Search upwards from currently selected frame (so that we can
3575 complete on local vars. */
3577 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
3579 if (!BLOCK_SUPERBLOCK (b))
3581 surrounding_static_block = b; /* For elmin of dups */
3584 /* Also catch fields of types defined in this places which match our
3585 text string. Only complete on types visible from current context. */
3587 ALL_BLOCK_SYMBOLS (b, i, sym)
3590 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3591 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3593 struct type *t = SYMBOL_TYPE (sym);
3594 enum type_code c = TYPE_CODE (t);
3596 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
3598 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
3600 if (TYPE_FIELD_NAME (t, j))
3602 completion_list_add_name (TYPE_FIELD_NAME (t, j),
3603 sym_text, sym_text_len, text, word);
3611 /* Go through the symtabs and check the externs and statics for
3612 symbols which match. */
3614 ALL_SYMTABS (objfile, s)
3617 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3618 ALL_BLOCK_SYMBOLS (b, i, sym)
3620 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3624 ALL_SYMTABS (objfile, s)
3627 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3628 /* Don't do this block twice. */
3629 if (b == surrounding_static_block)
3631 ALL_BLOCK_SYMBOLS (b, i, sym)
3633 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3637 return (return_val);
3640 /* Like make_symbol_completion_list, but returns a list of symbols
3641 defined in a source file FILE. */
3644 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
3646 register struct symbol *sym;
3647 register struct symtab *s;
3648 register struct block *b;
3650 /* The symbol we are completing on. Points in same buffer as text. */
3652 /* Length of sym_text. */
3655 /* Now look for the symbol we are supposed to complete on.
3656 FIXME: This should be language-specific. */
3660 char *quote_pos = NULL;
3662 /* First see if this is a quoted string. */
3664 for (p = text; *p != '\0'; ++p)
3666 if (quote_found != '\0')
3668 if (*p == quote_found)
3669 /* Found close quote. */
3671 else if (*p == '\\' && p[1] == quote_found)
3672 /* A backslash followed by the quote character
3673 doesn't end the string. */
3676 else if (*p == '\'' || *p == '"')
3682 if (quote_found == '\'')
3683 /* A string within single quotes can be a symbol, so complete on it. */
3684 sym_text = quote_pos + 1;
3685 else if (quote_found == '"')
3686 /* A double-quoted string is never a symbol, nor does it make sense
3687 to complete it any other way. */
3689 return_val = (char **) xmalloc (sizeof (char *));
3690 return_val[0] = NULL;
3695 /* Not a quoted string. */
3696 sym_text = language_search_unquoted_string (text, p);
3700 sym_text_len = strlen (sym_text);
3702 return_val_size = 10;
3703 return_val_index = 0;
3704 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3705 return_val[0] = NULL;
3707 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3709 s = lookup_symtab (srcfile);
3712 /* Maybe they typed the file with leading directories, while the
3713 symbol tables record only its basename. */
3714 const char *tail = lbasename (srcfile);
3717 s = lookup_symtab (tail);
3720 /* If we have no symtab for that file, return an empty list. */
3722 return (return_val);
3724 /* Go through this symtab and check the externs and statics for
3725 symbols which match. */
3727 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3728 ALL_BLOCK_SYMBOLS (b, i, sym)
3730 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3733 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3734 ALL_BLOCK_SYMBOLS (b, i, sym)
3736 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3739 return (return_val);
3742 /* A helper function for make_source_files_completion_list. It adds
3743 another file name to a list of possible completions, growing the
3744 list as necessary. */
3747 add_filename_to_list (const char *fname, char *text, char *word,
3748 char ***list, int *list_used, int *list_alloced)
3751 size_t fnlen = strlen (fname);
3753 if (*list_used + 1 >= *list_alloced)
3756 *list = (char **) xrealloc ((char *) *list,
3757 *list_alloced * sizeof (char *));
3762 /* Return exactly fname. */
3763 new = xmalloc (fnlen + 5);
3764 strcpy (new, fname);
3766 else if (word > text)
3768 /* Return some portion of fname. */
3769 new = xmalloc (fnlen + 5);
3770 strcpy (new, fname + (word - text));
3774 /* Return some of TEXT plus fname. */
3775 new = xmalloc (fnlen + (text - word) + 5);
3776 strncpy (new, word, text - word);
3777 new[text - word] = '\0';
3778 strcat (new, fname);
3780 (*list)[*list_used] = new;
3781 (*list)[++*list_used] = NULL;
3785 not_interesting_fname (const char *fname)
3787 static const char *illegal_aliens[] = {
3788 "_globals_", /* inserted by coff_symtab_read */
3793 for (i = 0; illegal_aliens[i]; i++)
3795 if (strcmp (fname, illegal_aliens[i]) == 0)
3801 /* Return a NULL terminated array of all source files whose names
3802 begin with matching TEXT. The file names are looked up in the
3803 symbol tables of this program. If the answer is no matchess, then
3804 the return value is an array which contains only a NULL pointer. */
3807 make_source_files_completion_list (char *text, char *word)
3809 register struct symtab *s;
3810 register struct partial_symtab *ps;
3811 register struct objfile *objfile;
3813 int list_alloced = 1;
3815 size_t text_len = strlen (text);
3816 char **list = (char **) xmalloc (list_alloced * sizeof (char *));
3817 const char *base_name;
3821 if (!have_full_symbols () && !have_partial_symbols ())
3824 ALL_SYMTABS (objfile, s)
3826 if (not_interesting_fname (s->filename))
3828 if (!filename_seen (s->filename, 1, &first)
3829 #if HAVE_DOS_BASED_FILE_SYSTEM
3830 && strncasecmp (s->filename, text, text_len) == 0
3832 && strncmp (s->filename, text, text_len) == 0
3836 /* This file matches for a completion; add it to the current
3838 add_filename_to_list (s->filename, text, word,
3839 &list, &list_used, &list_alloced);
3843 /* NOTE: We allow the user to type a base name when the
3844 debug info records leading directories, but not the other
3845 way around. This is what subroutines of breakpoint
3846 command do when they parse file names. */
3847 base_name = lbasename (s->filename);
3848 if (base_name != s->filename
3849 && !filename_seen (base_name, 1, &first)
3850 #if HAVE_DOS_BASED_FILE_SYSTEM
3851 && strncasecmp (base_name, text, text_len) == 0
3853 && strncmp (base_name, text, text_len) == 0
3856 add_filename_to_list (base_name, text, word,
3857 &list, &list_used, &list_alloced);
3861 ALL_PSYMTABS (objfile, ps)
3863 if (not_interesting_fname (ps->filename))
3867 if (!filename_seen (ps->filename, 1, &first)
3868 #if HAVE_DOS_BASED_FILE_SYSTEM
3869 && strncasecmp (ps->filename, text, text_len) == 0
3871 && strncmp (ps->filename, text, text_len) == 0
3875 /* This file matches for a completion; add it to the
3876 current list of matches. */
3877 add_filename_to_list (ps->filename, text, word,
3878 &list, &list_used, &list_alloced);
3883 base_name = lbasename (ps->filename);
3884 if (base_name != ps->filename
3885 && !filename_seen (base_name, 1, &first)
3886 #if HAVE_DOS_BASED_FILE_SYSTEM
3887 && strncasecmp (base_name, text, text_len) == 0
3889 && strncmp (base_name, text, text_len) == 0
3892 add_filename_to_list (base_name, text, word,
3893 &list, &list_used, &list_alloced);
3901 /* Determine if PC is in the prologue of a function. The prologue is the area
3902 between the first instruction of a function, and the first executable line.
3903 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
3905 If non-zero, func_start is where we think the prologue starts, possibly
3906 by previous examination of symbol table information.
3910 in_prologue (CORE_ADDR pc, CORE_ADDR func_start)
3912 struct symtab_and_line sal;
3913 CORE_ADDR func_addr, func_end;
3915 /* We have several sources of information we can consult to figure
3917 - Compilers usually emit line number info that marks the prologue
3918 as its own "source line". So the ending address of that "line"
3919 is the end of the prologue. If available, this is the most
3921 - The minimal symbols and partial symbols, which can usually tell
3922 us the starting and ending addresses of a function.
3923 - If we know the function's start address, we can call the
3924 architecture-defined SKIP_PROLOGUE function to analyze the
3925 instruction stream and guess where the prologue ends.
3926 - Our `func_start' argument; if non-zero, this is the caller's
3927 best guess as to the function's entry point. At the time of
3928 this writing, handle_inferior_event doesn't get this right, so
3929 it should be our last resort. */
3931 /* Consult the partial symbol table, to find which function
3933 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
3935 CORE_ADDR prologue_end;
3937 /* We don't even have minsym information, so fall back to using
3938 func_start, if given. */
3940 return 1; /* We *might* be in a prologue. */
3942 prologue_end = SKIP_PROLOGUE (func_start);
3944 return func_start <= pc && pc < prologue_end;
3947 /* If we have line number information for the function, that's
3948 usually pretty reliable. */
3949 sal = find_pc_line (func_addr, 0);
3951 /* Now sal describes the source line at the function's entry point,
3952 which (by convention) is the prologue. The end of that "line",
3953 sal.end, is the end of the prologue.
3955 Note that, for functions whose source code is all on a single
3956 line, the line number information doesn't always end up this way.
3957 So we must verify that our purported end-of-prologue address is
3958 *within* the function, not at its start or end. */
3960 || sal.end <= func_addr
3961 || func_end <= sal.end)
3963 /* We don't have any good line number info, so use the minsym
3964 information, together with the architecture-specific prologue
3966 CORE_ADDR prologue_end = SKIP_PROLOGUE (func_addr);
3968 return func_addr <= pc && pc < prologue_end;
3971 /* We have line number info, and it looks good. */
3972 return func_addr <= pc && pc < sal.end;
3976 /* Begin overload resolution functions */
3979 remove_params (const char *demangled_name)
3985 if (demangled_name == NULL)
3988 /* First find the end of the arg list. */
3989 argp = strrchr (demangled_name, ')');
3993 /* Back up to the beginning. */
3996 while (argp-- > demangled_name)
4000 else if (*argp == '(')
4009 internal_error (__FILE__, __LINE__,
4010 "bad demangled name %s\n", demangled_name);
4011 while (argp[-1] == ' ' && argp > demangled_name)
4014 new_name = xmalloc (argp - demangled_name + 1);
4015 memcpy (new_name, demangled_name, argp - demangled_name);
4016 new_name[argp - demangled_name] = '\0';
4020 /* Helper routine for make_symbol_completion_list. */
4022 static int sym_return_val_size;
4023 static int sym_return_val_index;
4024 static struct symbol **sym_return_val;
4026 /* Test to see if the symbol specified by SYMNAME (which is already
4027 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4028 characters. If so, add it to the current completion list. */
4031 overload_list_add_symbol (struct symbol *sym, char *oload_name)
4037 /* If there is no type information, we can't do anything, so skip */
4038 if (SYMBOL_TYPE (sym) == NULL)
4041 /* skip any symbols that we've already considered. */
4042 for (i = 0; i < sym_return_val_index; ++i)
4043 if (!strcmp (DEPRECATED_SYMBOL_NAME (sym), DEPRECATED_SYMBOL_NAME (sym_return_val[i])))
4046 /* Get the demangled name without parameters */
4047 sym_name = remove_params (SYMBOL_DEMANGLED_NAME (sym));
4051 /* skip symbols that cannot match */
4052 if (strcmp (sym_name, oload_name) != 0)
4060 /* We have a match for an overload instance, so add SYM to the current list
4061 * of overload instances */
4062 if (sym_return_val_index + 3 > sym_return_val_size)
4064 newsize = (sym_return_val_size *= 2) * sizeof (struct symbol *);
4065 sym_return_val = (struct symbol **) xrealloc ((char *) sym_return_val, newsize);
4067 sym_return_val[sym_return_val_index++] = sym;
4068 sym_return_val[sym_return_val_index] = NULL;
4071 /* Return a null-terminated list of pointers to function symbols that
4072 * match name of the supplied symbol FSYM.
4073 * This is used in finding all overloaded instances of a function name.
4074 * This has been modified from make_symbol_completion_list. */
4078 make_symbol_overload_list (struct symbol *fsym)
4080 register struct symbol *sym;
4081 register struct symtab *s;
4082 register struct partial_symtab *ps;
4083 register struct objfile *objfile;
4084 register struct block *b, *surrounding_static_block = 0;
4086 /* The name we are completing on. */
4087 char *oload_name = NULL;
4088 /* Length of name. */
4089 int oload_name_len = 0;
4091 /* Look for the symbol we are supposed to complete on. */
4093 oload_name = remove_params (SYMBOL_DEMANGLED_NAME (fsym));
4096 sym_return_val_size = 1;
4097 sym_return_val = (struct symbol **) xmalloc (2 * sizeof (struct symbol *));
4098 sym_return_val[0] = fsym;
4099 sym_return_val[1] = NULL;
4101 return sym_return_val;
4103 oload_name_len = strlen (oload_name);
4105 sym_return_val_size = 100;
4106 sym_return_val_index = 0;
4107 sym_return_val = (struct symbol **) xmalloc ((sym_return_val_size + 1) * sizeof (struct symbol *));
4108 sym_return_val[0] = NULL;
4110 /* Read in all partial symtabs containing a partial symbol named
4113 ALL_PSYMTABS (objfile, ps)
4115 struct partial_symbol **psym;
4117 /* If the psymtab's been read in we'll get it when we search
4118 through the blockvector. */
4122 if ((lookup_partial_symbol (ps, oload_name, NULL, 1, VAR_DOMAIN)
4124 || (lookup_partial_symbol (ps, oload_name, NULL, 0, VAR_DOMAIN)
4126 PSYMTAB_TO_SYMTAB (ps);
4129 /* Search upwards from currently selected frame (so that we can
4130 complete on local vars. */
4132 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
4134 if (!BLOCK_SUPERBLOCK (b))
4136 surrounding_static_block = b; /* For elimination of dups */
4139 /* Also catch fields of types defined in this places which match our
4140 text string. Only complete on types visible from current context. */
4142 ALL_BLOCK_SYMBOLS (b, i, sym)
4144 overload_list_add_symbol (sym, oload_name);
4148 /* Go through the symtabs and check the externs and statics for
4149 symbols which match. */
4151 ALL_SYMTABS (objfile, s)
4154 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4155 ALL_BLOCK_SYMBOLS (b, i, sym)
4157 overload_list_add_symbol (sym, oload_name);
4161 ALL_SYMTABS (objfile, s)
4164 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4165 /* Don't do this block twice. */
4166 if (b == surrounding_static_block)
4168 ALL_BLOCK_SYMBOLS (b, i, sym)
4170 overload_list_add_symbol (sym, oload_name);
4176 return (sym_return_val);
4179 /* End of overload resolution functions */
4181 struct symtabs_and_lines
4182 decode_line_spec (char *string, int funfirstline)
4184 struct symtabs_and_lines sals;
4185 struct symtab_and_line cursal;
4188 error ("Empty line specification.");
4190 /* We use whatever is set as the current source line. We do not try
4191 and get a default or it will recursively call us! */
4192 cursal = get_current_source_symtab_and_line ();
4194 sals = decode_line_1 (&string, funfirstline,
4195 cursal.symtab, cursal.line,
4199 error ("Junk at end of line specification: %s", string);
4204 static char *name_of_main;
4207 set_main_name (const char *name)
4209 if (name_of_main != NULL)
4211 xfree (name_of_main);
4212 name_of_main = NULL;
4216 name_of_main = xstrdup (name);
4223 if (name_of_main != NULL)
4224 return name_of_main;
4231 _initialize_symtab (void)
4233 add_info ("variables", variables_info,
4234 "All global and static variable names, or those matching REGEXP.");
4236 add_com ("whereis", class_info, variables_info,
4237 "All global and static variable names, or those matching REGEXP.");
4239 add_info ("functions", functions_info,
4240 "All function names, or those matching REGEXP.");
4243 /* FIXME: This command has at least the following problems:
4244 1. It prints builtin types (in a very strange and confusing fashion).
4245 2. It doesn't print right, e.g. with
4246 typedef struct foo *FOO
4247 type_print prints "FOO" when we want to make it (in this situation)
4248 print "struct foo *".
4249 I also think "ptype" or "whatis" is more likely to be useful (but if
4250 there is much disagreement "info types" can be fixed). */
4251 add_info ("types", types_info,
4252 "All type names, or those matching REGEXP.");
4254 add_info ("sources", sources_info,
4255 "Source files in the program.");
4257 add_com ("rbreak", class_breakpoint, rbreak_command,
4258 "Set a breakpoint for all functions matching REGEXP.");
4262 add_com ("lf", class_info, sources_info, "Source files in the program");
4263 add_com ("lg", class_info, variables_info,
4264 "All global and static variable names, or those matching REGEXP.");
4267 /* Initialize the one built-in type that isn't language dependent... */
4268 builtin_type_error = init_type (TYPE_CODE_ERROR, 0, 0,
4269 "<unknown type>", (struct objfile *) NULL);