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);
972 /* NOTE: carlton/2002-11-05: At the time that this code was
973 #ifdeffed out, the value of 'block' was always NULL at this
974 point, hence the bemused comments below. */
976 /* FIXME: this code is never executed--block is always NULL at this
977 point. What is it trying to do, anyway? We already should have
978 checked the STATIC_BLOCK above (it is the superblock of top-level
979 blocks). Why is VAR_DOMAIN special-cased? */
980 /* Don't need to mess with the psymtabs; if we have a block,
981 that file is read in. If we don't, then we deal later with
982 all the psymtab stuff that needs checking. */
983 /* Note (RT): The following never-executed code looks unnecessary to me also.
984 * If we change the code to use the original (passed-in)
985 * value of 'block', we could cause it to execute, but then what
986 * would it do? The STATIC_BLOCK of the symtab containing the passed-in
987 * 'block' was already searched by the above code. And the STATIC_BLOCK's
988 * of *other* symtabs (those files not containing 'block' lexically)
989 * should not contain 'block' address-wise. So we wouldn't expect this
990 * code to find any 'sym''s that were not found above. I vote for
991 * deleting the following paragraph of code.
993 if (domain == VAR_DOMAIN && block != NULL)
996 /* Find the right symtab. */
997 ALL_SYMTABS (objfile, s)
999 bv = BLOCKVECTOR (s);
1000 b = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1001 if (BLOCK_START (b) <= BLOCK_START (block)
1002 && BLOCK_END (b) > BLOCK_START (block))
1004 sym = lookup_block_symbol (b, name, linkage_name, VAR_DOMAIN);
1010 return fixup_symbol_section (sym, objfile);
1017 /* C++/Java/Objective-C: If requested to do so by the caller,
1018 check to see if NAME is a field of `this'. */
1019 if (is_a_field_of_this)
1021 struct value *v = value_of_this (0);
1023 *is_a_field_of_this = 0;
1024 if (v && check_field (v, name))
1026 *is_a_field_of_this = 1;
1033 /* If there's a static block to search, search it next. */
1035 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1036 not it would be appropriate to search the current global block
1037 here as well. (That's what this code used to do before the
1038 is_a_field_of_this check was moved up.) On the one hand, it's
1039 redundant with the lookup_symbol_aux_symtabs search that happens
1040 next. On the other hand, if decode_line_1 is passed an argument
1041 like filename:var, then the user presumably wants 'var' to be
1042 searched for in filename. On the third hand, there shouldn't be
1043 multiple global variables all of which are named 'var', and it's
1044 not like decode_line_1 has ever restricted its search to only
1045 global variables in a single filename. All in all, only
1046 searching the static block here seems best: it's correct and it's
1049 /* NOTE: carlton/2002-12-05: There's also a possible performance
1050 issue here: if you usually search for global symbols in the
1051 current file, then it would be slightly better to search the
1052 current global block before searching all the symtabs. But there
1053 are other factors that have a much greater effect on performance
1054 than that one, so I don't think we should worry about that for
1057 if (static_block != NULL)
1059 sym = lookup_symbol_aux_block (name, linkage_name, static_block,
1065 /* Now search all global blocks. Do the symtab's first, then
1066 check the psymtab's. If a psymtab indicates the existence
1067 of the desired name as a global, then do psymtab-to-symtab
1068 conversion on the fly and return the found symbol. */
1070 sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name,
1075 sym = lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name,
1080 /* Now search all static file-level symbols. Not strictly correct,
1081 but more useful than an error. Do the symtabs first, then check
1082 the psymtabs. If a psymtab indicates the existence of the
1083 desired name as a file-level static, then do psymtab-to-symtab
1084 conversion on the fly and return the found symbol. */
1086 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, linkage_name,
1091 sym = lookup_symbol_aux_psymtabs (STATIC_BLOCK, name, linkage_name,
1101 /* Check to see if the symbol is defined in BLOCK or its superiors.
1102 Don't search STATIC_BLOCK or GLOBAL_BLOCK. If we don't find a
1103 match, store the address of STATIC_BLOCK in static_block. */
1105 static struct symbol *
1106 lookup_symbol_aux_local (const char *name, const char *linkage_name,
1107 const struct block *block,
1108 const domain_enum domain,
1109 struct symtab **symtab,
1110 const struct block **static_block)
1114 /* Check if either no block is specified or it's a global block. */
1116 if (block == NULL || BLOCK_SUPERBLOCK (block) == NULL)
1118 *static_block = NULL;
1122 while (BLOCK_SUPERBLOCK (BLOCK_SUPERBLOCK (block)) != NULL)
1124 sym = lookup_symbol_aux_block (name, linkage_name, block, domain,
1128 block = BLOCK_SUPERBLOCK (block);
1131 /* We've reached the static block. */
1133 *static_block = block;
1137 /* Look up a symbol in a block; if found, locate its symtab, fixup the
1138 symbol, and set block_found appropriately. */
1140 static struct symbol *
1141 lookup_symbol_aux_block (const char *name, const char *linkage_name,
1142 const struct block *block,
1143 const domain_enum domain,
1144 struct symtab **symtab)
1147 struct objfile *objfile = NULL;
1148 struct blockvector *bv;
1150 struct symtab *s = NULL;
1152 sym = lookup_block_symbol (block, name, linkage_name, domain);
1155 block_found = block;
1158 /* Search the list of symtabs for one which contains the
1159 address of the start of this block. */
1160 ALL_SYMTABS (objfile, s)
1162 bv = BLOCKVECTOR (s);
1163 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1164 if (BLOCK_START (b) <= BLOCK_START (block)
1165 && BLOCK_END (b) > BLOCK_START (block))
1172 return fixup_symbol_section (sym, objfile);
1178 /* Check to see if the symbol is defined in one of the symtabs.
1179 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1180 depending on whether or not we want to search global symbols or
1183 static struct symbol *
1184 lookup_symbol_aux_symtabs (int block_index,
1185 const char *name, const char *linkage_name,
1186 const domain_enum domain,
1187 struct symtab **symtab)
1190 struct objfile *objfile;
1191 struct blockvector *bv;
1192 const struct block *block;
1195 ALL_SYMTABS (objfile, s)
1197 bv = BLOCKVECTOR (s);
1198 block = BLOCKVECTOR_BLOCK (bv, block_index);
1199 sym = lookup_block_symbol (block, name, linkage_name, domain);
1202 block_found = block;
1205 return fixup_symbol_section (sym, objfile);
1212 /* Check to see if the symbol is defined in one of the partial
1213 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1214 STATIC_BLOCK, depending on whether or not we want to search global
1215 symbols or static symbols. */
1217 static struct symbol *
1218 lookup_symbol_aux_psymtabs (int block_index, const char *name,
1219 const char *linkage_name,
1220 const domain_enum domain,
1221 struct symtab **symtab)
1224 struct objfile *objfile;
1225 struct blockvector *bv;
1226 const struct block *block;
1227 struct partial_symtab *ps;
1229 const int psymtab_index = (block_index == GLOBAL_BLOCK ? 1 : 0);
1231 ALL_PSYMTABS (objfile, ps)
1234 && lookup_partial_symbol (ps, name, linkage_name,
1235 psymtab_index, domain))
1237 s = PSYMTAB_TO_SYMTAB (ps);
1238 bv = BLOCKVECTOR (s);
1239 block = BLOCKVECTOR_BLOCK (bv, block_index);
1240 sym = lookup_block_symbol (block, name, linkage_name, domain);
1243 /* This shouldn't be necessary, but as a last resort try
1244 looking in the statics even though the psymtab claimed
1245 the symbol was global, or vice-versa. It's possible
1246 that the psymtab gets it wrong in some cases. */
1248 /* FIXME: carlton/2002-09-30: Should we really do that?
1249 If that happens, isn't it likely to be a GDB error, in
1250 which case we should fix the GDB error rather than
1251 silently dealing with it here? So I'd vote for
1252 removing the check for the symbol in the other
1254 block = BLOCKVECTOR_BLOCK (bv,
1255 block_index == GLOBAL_BLOCK ?
1256 STATIC_BLOCK : GLOBAL_BLOCK);
1257 sym = lookup_block_symbol (block, name, linkage_name, domain);
1259 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>).",
1260 block_index == GLOBAL_BLOCK ? "global" : "static",
1261 name, ps->filename, name, name);
1265 return fixup_symbol_section (sym, objfile);
1273 /* Check for the possibility of the symbol being a function or a
1274 mangled variable that is stored in one of the minimal symbol
1275 tables. Eventually, all global symbols might be resolved in this
1278 /* NOTE: carlton/2002-12-05: At one point, this function was part of
1279 lookup_symbol_aux, and what are now 'return' statements within
1280 lookup_symbol_aux_minsyms returned from lookup_symbol_aux, even if
1281 sym was NULL. As far as I can tell, this was basically accidental;
1282 it didn't happen every time that msymbol was non-NULL, but only if
1283 some additional conditions held as well, and it caused problems
1284 with HP-generated symbol tables. */
1286 /* NOTE: carlton/2003-05-14: This function was once used as part of
1287 lookup_symbol. It is currently unnecessary for correctness
1288 reasons, however, and using it doesn't seem to be any faster than
1289 using lookup_symbol_aux_psymtabs, so I'm commenting it out. */
1291 static struct symbol *
1292 lookup_symbol_aux_minsyms (const char *name,
1293 const char *linkage_name,
1294 const domain_enum domain,
1295 int *is_a_field_of_this,
1296 struct symtab **symtab)
1299 struct blockvector *bv;
1300 const struct block *block;
1301 struct minimal_symbol *msymbol;
1304 if (domain == VAR_DOMAIN)
1306 msymbol = lookup_minimal_symbol (name, NULL, NULL);
1308 if (msymbol != NULL)
1310 /* OK, we found a minimal symbol in spite of not finding any
1311 symbol. There are various possible explanations for
1312 this. One possibility is the symbol exists in code not
1313 compiled -g. Another possibility is that the 'psymtab'
1314 isn't doing its job. A third possibility, related to #2,
1315 is that we were confused by name-mangling. For instance,
1316 maybe the psymtab isn't doing its job because it only
1317 know about demangled names, but we were given a mangled
1320 /* We first use the address in the msymbol to try to locate
1321 the appropriate symtab. Note that find_pc_sect_symtab()
1322 has a side-effect of doing psymtab-to-symtab expansion,
1323 for the found symtab. */
1324 s = find_pc_sect_symtab (SYMBOL_VALUE_ADDRESS (msymbol),
1325 SYMBOL_BFD_SECTION (msymbol));
1328 /* This is a function which has a symtab for its address. */
1329 bv = BLOCKVECTOR (s);
1330 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1332 /* This call used to pass `DEPRECATED_SYMBOL_NAME (msymbol)' as the
1333 `name' argument to lookup_block_symbol. But the name
1334 of a minimal symbol is always mangled, so that seems
1335 to be clearly the wrong thing to pass as the
1338 lookup_block_symbol (block, name, linkage_name, domain);
1339 /* We kept static functions in minimal symbol table as well as
1340 in static scope. We want to find them in the symbol table. */
1343 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1344 sym = lookup_block_symbol (block, name,
1345 linkage_name, domain);
1348 /* NOTE: carlton/2002-12-04: The following comment was
1349 taken from a time when two versions of this function
1350 were part of the body of lookup_symbol_aux: this
1351 comment was taken from the version of the function
1352 that was #ifdef HPUXHPPA, and the comment was right
1353 before the 'return NULL' part of lookup_symbol_aux.
1354 (Hence the "Fall through and return 0" comment.)
1355 Elena did some digging into the situation for
1356 Fortran, and she reports:
1358 "I asked around (thanks to Jeff Knaggs), and I think
1359 the story for Fortran goes like this:
1361 "Apparently, in older Fortrans, '_' was not part of
1362 the user namespace. g77 attached a final '_' to
1363 procedure names as the exported symbols for linkage
1364 (foo_) , but the symbols went in the debug info just
1365 like 'foo'. The rationale behind this is not
1366 completely clear, and maybe it was done to other
1367 symbols as well, not just procedures." */
1369 /* If we get here with sym == 0, the symbol was
1370 found in the minimal symbol table
1371 but not in the symtab.
1372 Fall through and return 0 to use the msymbol
1373 definition of "foo_".
1374 (Note that outer code generally follows up a call
1375 to this routine with a call to lookup_minimal_symbol(),
1376 so a 0 return means we'll just flow into that other routine).
1378 This happens for Fortran "foo_" symbols,
1379 which are "foo" in the symtab.
1381 This can also happen if "asm" is used to make a
1382 regular symbol but not a debugging symbol, e.g.
1383 asm(".globl _main");
1387 if (symtab != NULL && sym != NULL)
1389 return fixup_symbol_section (sym, s->objfile);
1398 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1399 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1400 linkage name matches it. Check the global symbols if GLOBAL, the
1401 static symbols if not */
1403 static struct partial_symbol *
1404 lookup_partial_symbol (struct partial_symtab *pst, const char *name,
1405 const char *linkage_name, int global,
1408 struct partial_symbol *temp;
1409 struct partial_symbol **start, **psym;
1410 struct partial_symbol **top, **real_top, **bottom, **center;
1411 int length = (global ? pst->n_global_syms : pst->n_static_syms);
1412 int do_linear_search = 1;
1419 pst->objfile->global_psymbols.list + pst->globals_offset :
1420 pst->objfile->static_psymbols.list + pst->statics_offset);
1422 if (global) /* This means we can use a binary search. */
1424 do_linear_search = 0;
1426 /* Binary search. This search is guaranteed to end with center
1427 pointing at the earliest partial symbol whose name might be
1428 correct. At that point *all* partial symbols with an
1429 appropriate name will be checked against the correct
1433 top = start + length - 1;
1435 while (top > bottom)
1437 center = bottom + (top - bottom) / 2;
1438 if (!(center < top))
1439 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1440 if (!do_linear_search
1441 && (SYMBOL_LANGUAGE (*center) == language_java))
1443 do_linear_search = 1;
1445 if (strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*center), name) >= 0)
1451 bottom = center + 1;
1454 if (!(top == bottom))
1455 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1457 while (top <= real_top
1458 && (linkage_name != NULL
1459 ? strcmp (SYMBOL_LINKAGE_NAME (*top), linkage_name) == 0
1460 : SYMBOL_MATCHES_NATURAL_NAME (*top,name)))
1462 if (SYMBOL_DOMAIN (*top) == domain)
1470 /* Can't use a binary search or else we found during the binary search that
1471 we should also do a linear search. */
1473 if (do_linear_search)
1475 for (psym = start; psym < start + length; psym++)
1477 if (domain == SYMBOL_DOMAIN (*psym))
1479 if (linkage_name != NULL
1480 ? strcmp (SYMBOL_LINKAGE_NAME (*psym), linkage_name) == 0
1481 : SYMBOL_MATCHES_NATURAL_NAME (*psym, name))
1492 /* Look up a type named NAME in the struct_domain. The type returned
1493 must not be opaque -- i.e., must have at least one field defined
1495 This code was modelled on lookup_symbol -- the parts not relevant to looking
1496 up types were just left out. In particular it's assumed here that types
1497 are available in struct_domain and only at file-static or global blocks. */
1501 lookup_transparent_type (const char *name)
1503 register struct symbol *sym;
1504 register struct symtab *s = NULL;
1505 register struct partial_symtab *ps;
1506 struct blockvector *bv;
1507 register struct objfile *objfile;
1508 register struct block *block;
1510 /* Now search all the global symbols. Do the symtab's first, then
1511 check the psymtab's. If a psymtab indicates the existence
1512 of the desired name as a global, then do psymtab-to-symtab
1513 conversion on the fly and return the found symbol. */
1515 ALL_SYMTABS (objfile, s)
1517 bv = BLOCKVECTOR (s);
1518 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1519 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1520 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1522 return SYMBOL_TYPE (sym);
1526 ALL_PSYMTABS (objfile, ps)
1528 if (!ps->readin && lookup_partial_symbol (ps, name, NULL,
1531 s = PSYMTAB_TO_SYMTAB (ps);
1532 bv = BLOCKVECTOR (s);
1533 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1534 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1537 /* This shouldn't be necessary, but as a last resort
1538 * try looking in the statics even though the psymtab
1539 * claimed the symbol was global. It's possible that
1540 * the psymtab gets it wrong in some cases.
1542 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1543 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1545 error ("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1546 %s may be an inlined function, or may be a template function\n\
1547 (if a template, try specifying an instantiation: %s<type>).",
1548 name, ps->filename, name, name);
1550 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1551 return SYMBOL_TYPE (sym);
1555 /* Now search the static file-level symbols.
1556 Not strictly correct, but more useful than an error.
1557 Do the symtab's first, then
1558 check the psymtab's. If a psymtab indicates the existence
1559 of the desired name as a file-level static, then do psymtab-to-symtab
1560 conversion on the fly and return the found symbol.
1563 ALL_SYMTABS (objfile, s)
1565 bv = BLOCKVECTOR (s);
1566 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1567 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1568 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1570 return SYMBOL_TYPE (sym);
1574 ALL_PSYMTABS (objfile, ps)
1576 if (!ps->readin && lookup_partial_symbol (ps, name, NULL, 0, STRUCT_DOMAIN))
1578 s = PSYMTAB_TO_SYMTAB (ps);
1579 bv = BLOCKVECTOR (s);
1580 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1581 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1584 /* This shouldn't be necessary, but as a last resort
1585 * try looking in the globals even though the psymtab
1586 * claimed the symbol was static. It's possible that
1587 * the psymtab gets it wrong in some cases.
1589 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1590 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1592 error ("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1593 %s may be an inlined function, or may be a template function\n\
1594 (if a template, try specifying an instantiation: %s<type>).",
1595 name, ps->filename, name, name);
1597 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1598 return SYMBOL_TYPE (sym);
1601 return (struct type *) 0;
1605 /* Find the psymtab containing main(). */
1606 /* FIXME: What about languages without main() or specially linked
1607 executables that have no main() ? */
1609 struct partial_symtab *
1610 find_main_psymtab (void)
1612 register struct partial_symtab *pst;
1613 register struct objfile *objfile;
1615 ALL_PSYMTABS (objfile, pst)
1617 if (lookup_partial_symbol (pst, main_name (), NULL, 1, VAR_DOMAIN))
1625 /* Search BLOCK for symbol NAME in DOMAIN.
1627 Note that if NAME is the demangled form of a C++ symbol, we will fail
1628 to find a match during the binary search of the non-encoded names, but
1629 for now we don't worry about the slight inefficiency of looking for
1630 a match we'll never find, since it will go pretty quick. Once the
1631 binary search terminates, we drop through and do a straight linear
1632 search on the symbols. Each symbol which is marked as being a ObjC/C++
1633 symbol (language_cplus or language_objc set) has both the encoded and
1634 non-encoded names tested for a match.
1636 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1637 particular mangled name.
1641 lookup_block_symbol (register const struct block *block, const char *name,
1642 const char *linkage_name,
1643 const domain_enum domain)
1645 register int bot, top, inc;
1646 register struct symbol *sym;
1647 register struct symbol *sym_found = NULL;
1648 register int do_linear_search = 1;
1650 if (BLOCK_HASHTABLE (block))
1652 unsigned int hash_index;
1653 hash_index = msymbol_hash_iw (name);
1654 hash_index = hash_index % BLOCK_BUCKETS (block);
1655 for (sym = BLOCK_BUCKET (block, hash_index); sym; sym = sym->hash_next)
1657 if (SYMBOL_DOMAIN (sym) == domain
1659 ? strcmp (DEPRECATED_SYMBOL_NAME (sym), linkage_name) == 0
1660 : SYMBOL_MATCHES_NATURAL_NAME (sym, name)))
1666 /* If the blocks's symbols were sorted, start with a binary search. */
1668 if (BLOCK_SHOULD_SORT (block))
1670 /* Reset the linear search flag so if the binary search fails, we
1671 won't do the linear search once unless we find some reason to
1674 do_linear_search = 0;
1675 top = BLOCK_NSYMS (block);
1678 /* Advance BOT to not far before the first symbol whose name is NAME. */
1682 inc = (top - bot + 1);
1683 /* No need to keep binary searching for the last few bits worth. */
1688 inc = (inc >> 1) + bot;
1689 sym = BLOCK_SYM (block, inc);
1690 if (!do_linear_search && (SYMBOL_LANGUAGE (sym) == language_java))
1692 do_linear_search = 1;
1694 if (SYMBOL_NATURAL_NAME (sym)[0] < name[0])
1698 else if (SYMBOL_NATURAL_NAME (sym)[0] > name[0])
1702 else if (strcmp (SYMBOL_NATURAL_NAME (sym), name) < 0)
1712 /* Now scan forward until we run out of symbols, find one whose
1713 name is greater than NAME, or find one we want. If there is
1714 more than one symbol with the right name and domain, we
1715 return the first one; I believe it is now impossible for us
1716 to encounter two symbols with the same name and domain
1717 here, because blocks containing argument symbols are no
1718 longer sorted. The exception is for C++, where multiple functions
1719 (cloned constructors / destructors, in particular) can have
1720 the same demangled name. So if we have a particular
1721 mangled name to match, try to do so. */
1723 top = BLOCK_NSYMS (block);
1726 sym = BLOCK_SYM (block, bot);
1727 if (SYMBOL_DOMAIN (sym) == domain
1729 ? strcmp (DEPRECATED_SYMBOL_NAME (sym), linkage_name) == 0
1730 : SYMBOL_MATCHES_NATURAL_NAME (sym, name)))
1734 if (SYMBOL_PRINT_NAME (sym)[0] > name[0])
1742 /* Here if block isn't sorted, or we fail to find a match during the
1743 binary search above. If during the binary search above, we find a
1744 symbol which is a Java symbol, then we have re-enabled the linear
1745 search flag which was reset when starting the binary search.
1747 This loop is equivalent to the loop above, but hacked greatly for speed.
1749 Note that parameter symbols do not always show up last in the
1750 list; this loop makes sure to take anything else other than
1751 parameter symbols first; it only uses parameter symbols as a
1752 last resort. Note that this only takes up extra computation
1755 if (do_linear_search)
1757 top = BLOCK_NSYMS (block);
1761 sym = BLOCK_SYM (block, bot);
1762 if (SYMBOL_DOMAIN (sym) == domain
1764 ? strcmp (DEPRECATED_SYMBOL_NAME (sym), linkage_name) == 0
1765 : SYMBOL_MATCHES_NATURAL_NAME (sym, name)))
1767 /* If SYM has aliases, then use any alias that is active
1768 at the current PC. If no alias is active at the current
1769 PC, then use the main symbol.
1771 ?!? Is checking the current pc correct? Is this routine
1772 ever called to look up a symbol from another context?
1774 FIXME: No, it's not correct. If someone sets a
1775 conditional breakpoint at an address, then the
1776 breakpoint's `struct expression' should refer to the
1777 `struct symbol' appropriate for the breakpoint's
1778 address, which may not be the PC.
1780 Even if it were never called from another context,
1781 it's totally bizarre for lookup_symbol's behavior to
1782 depend on the value of the inferior's current PC. We
1783 should pass in the appropriate PC as well as the
1784 block. The interface to lookup_symbol should change
1785 to require the caller to provide a PC. */
1787 if (SYMBOL_ALIASES (sym))
1788 sym = find_active_alias (sym, read_pc ());
1791 if (SYMBOL_CLASS (sym) != LOC_ARG &&
1792 SYMBOL_CLASS (sym) != LOC_LOCAL_ARG &&
1793 SYMBOL_CLASS (sym) != LOC_REF_ARG &&
1794 SYMBOL_CLASS (sym) != LOC_REGPARM &&
1795 SYMBOL_CLASS (sym) != LOC_REGPARM_ADDR &&
1796 SYMBOL_CLASS (sym) != LOC_BASEREG_ARG &&
1797 SYMBOL_CLASS (sym) != LOC_COMPUTED_ARG)
1805 return (sym_found); /* Will be NULL if not found. */
1808 /* Given a main symbol SYM and ADDR, search through the alias
1809 list to determine if an alias is active at ADDR and return
1812 If no alias is active, then return SYM. */
1814 static struct symbol *
1815 find_active_alias (struct symbol *sym, CORE_ADDR addr)
1817 struct range_list *r;
1818 struct alias_list *aliases;
1820 /* If we have aliases, check them first. */
1821 aliases = SYMBOL_ALIASES (sym);
1825 if (!SYMBOL_RANGES (aliases->sym))
1826 return aliases->sym;
1827 for (r = SYMBOL_RANGES (aliases->sym); r; r = r->next)
1829 if (r->start <= addr && r->end > addr)
1830 return aliases->sym;
1832 aliases = aliases->next;
1835 /* Nothing found, return the main symbol. */
1840 /* Find the symtab associated with PC and SECTION. Look through the
1841 psymtabs and read in another symtab if necessary. */
1844 find_pc_sect_symtab (CORE_ADDR pc, asection *section)
1846 register struct block *b;
1847 struct blockvector *bv;
1848 register struct symtab *s = NULL;
1849 register struct symtab *best_s = NULL;
1850 register struct partial_symtab *ps;
1851 register struct objfile *objfile;
1852 CORE_ADDR distance = 0;
1853 struct minimal_symbol *msymbol;
1855 /* If we know that this is not a text address, return failure. This is
1856 necessary because we loop based on the block's high and low code
1857 addresses, which do not include the data ranges, and because
1858 we call find_pc_sect_psymtab which has a similar restriction based
1859 on the partial_symtab's texthigh and textlow. */
1860 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
1862 && (msymbol->type == mst_data
1863 || msymbol->type == mst_bss
1864 || msymbol->type == mst_abs
1865 || msymbol->type == mst_file_data
1866 || msymbol->type == mst_file_bss))
1869 /* Search all symtabs for the one whose file contains our address, and which
1870 is the smallest of all the ones containing the address. This is designed
1871 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1872 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1873 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1875 This happens for native ecoff format, where code from included files
1876 gets its own symtab. The symtab for the included file should have
1877 been read in already via the dependency mechanism.
1878 It might be swifter to create several symtabs with the same name
1879 like xcoff does (I'm not sure).
1881 It also happens for objfiles that have their functions reordered.
1882 For these, the symtab we are looking for is not necessarily read in. */
1884 ALL_SYMTABS (objfile, s)
1886 bv = BLOCKVECTOR (s);
1887 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1889 if (BLOCK_START (b) <= pc
1890 && BLOCK_END (b) > pc
1892 || BLOCK_END (b) - BLOCK_START (b) < distance))
1894 /* For an objfile that has its functions reordered,
1895 find_pc_psymtab will find the proper partial symbol table
1896 and we simply return its corresponding symtab. */
1897 /* In order to better support objfiles that contain both
1898 stabs and coff debugging info, we continue on if a psymtab
1900 if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs)
1902 ps = find_pc_sect_psymtab (pc, section);
1904 return PSYMTAB_TO_SYMTAB (ps);
1909 struct symbol *sym = NULL;
1911 ALL_BLOCK_SYMBOLS (b, i, sym)
1913 fixup_symbol_section (sym, objfile);
1914 if (section == SYMBOL_BFD_SECTION (sym))
1917 if ((i >= BLOCK_BUCKETS (b)) && (sym == NULL))
1918 continue; /* no symbol in this symtab matches section */
1920 distance = BLOCK_END (b) - BLOCK_START (b);
1929 ps = find_pc_sect_psymtab (pc, section);
1933 /* Might want to error() here (in case symtab is corrupt and
1934 will cause a core dump), but maybe we can successfully
1935 continue, so let's not. */
1937 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n",
1939 s = PSYMTAB_TO_SYMTAB (ps);
1944 /* Find the symtab associated with PC. Look through the psymtabs and
1945 read in another symtab if necessary. Backward compatibility, no section */
1948 find_pc_symtab (CORE_ADDR pc)
1950 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
1954 /* Find the source file and line number for a given PC value and SECTION.
1955 Return a structure containing a symtab pointer, a line number,
1956 and a pc range for the entire source line.
1957 The value's .pc field is NOT the specified pc.
1958 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1959 use the line that ends there. Otherwise, in that case, the line
1960 that begins there is used. */
1962 /* The big complication here is that a line may start in one file, and end just
1963 before the start of another file. This usually occurs when you #include
1964 code in the middle of a subroutine. To properly find the end of a line's PC
1965 range, we must search all symtabs associated with this compilation unit, and
1966 find the one whose first PC is closer than that of the next line in this
1969 /* If it's worth the effort, we could be using a binary search. */
1971 struct symtab_and_line
1972 find_pc_sect_line (CORE_ADDR pc, struct sec *section, int notcurrent)
1975 register struct linetable *l;
1978 register struct linetable_entry *item;
1979 struct symtab_and_line val;
1980 struct blockvector *bv;
1981 struct minimal_symbol *msymbol;
1982 struct minimal_symbol *mfunsym;
1984 /* Info on best line seen so far, and where it starts, and its file. */
1986 struct linetable_entry *best = NULL;
1987 CORE_ADDR best_end = 0;
1988 struct symtab *best_symtab = 0;
1990 /* Store here the first line number
1991 of a file which contains the line at the smallest pc after PC.
1992 If we don't find a line whose range contains PC,
1993 we will use a line one less than this,
1994 with a range from the start of that file to the first line's pc. */
1995 struct linetable_entry *alt = NULL;
1996 struct symtab *alt_symtab = 0;
1998 /* Info on best line seen in this file. */
2000 struct linetable_entry *prev;
2002 /* If this pc is not from the current frame,
2003 it is the address of the end of a call instruction.
2004 Quite likely that is the start of the following statement.
2005 But what we want is the statement containing the instruction.
2006 Fudge the pc to make sure we get that. */
2008 init_sal (&val); /* initialize to zeroes */
2010 /* It's tempting to assume that, if we can't find debugging info for
2011 any function enclosing PC, that we shouldn't search for line
2012 number info, either. However, GAS can emit line number info for
2013 assembly files --- very helpful when debugging hand-written
2014 assembly code. In such a case, we'd have no debug info for the
2015 function, but we would have line info. */
2020 /* elz: added this because this function returned the wrong
2021 information if the pc belongs to a stub (import/export)
2022 to call a shlib function. This stub would be anywhere between
2023 two functions in the target, and the line info was erroneously
2024 taken to be the one of the line before the pc.
2026 /* RT: Further explanation:
2028 * We have stubs (trampolines) inserted between procedures.
2030 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2031 * exists in the main image.
2033 * In the minimal symbol table, we have a bunch of symbols
2034 * sorted by start address. The stubs are marked as "trampoline",
2035 * the others appear as text. E.g.:
2037 * Minimal symbol table for main image
2038 * main: code for main (text symbol)
2039 * shr1: stub (trampoline symbol)
2040 * foo: code for foo (text symbol)
2042 * Minimal symbol table for "shr1" image:
2044 * shr1: code for shr1 (text symbol)
2047 * So the code below is trying to detect if we are in the stub
2048 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2049 * and if found, do the symbolization from the real-code address
2050 * rather than the stub address.
2052 * Assumptions being made about the minimal symbol table:
2053 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2054 * if we're really in the trampoline. If we're beyond it (say
2055 * we're in "foo" in the above example), it'll have a closer
2056 * symbol (the "foo" text symbol for example) and will not
2057 * return the trampoline.
2058 * 2. lookup_minimal_symbol_text() will find a real text symbol
2059 * corresponding to the trampoline, and whose address will
2060 * be different than the trampoline address. I put in a sanity
2061 * check for the address being the same, to avoid an
2062 * infinite recursion.
2064 msymbol = lookup_minimal_symbol_by_pc (pc);
2065 if (msymbol != NULL)
2066 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2068 mfunsym = lookup_minimal_symbol_text (DEPRECATED_SYMBOL_NAME (msymbol), NULL, NULL);
2069 if (mfunsym == NULL)
2070 /* I eliminated this warning since it is coming out
2071 * in the following situation:
2072 * gdb shmain // test program with shared libraries
2073 * (gdb) break shr1 // function in shared lib
2074 * Warning: In stub for ...
2075 * In the above situation, the shared lib is not loaded yet,
2076 * so of course we can't find the real func/line info,
2077 * but the "break" still works, and the warning is annoying.
2078 * So I commented out the warning. RT */
2079 /* warning ("In stub for %s; unable to find real function/line info", DEPRECATED_SYMBOL_NAME (msymbol)) */ ;
2081 else if (SYMBOL_VALUE (mfunsym) == SYMBOL_VALUE (msymbol))
2082 /* Avoid infinite recursion */
2083 /* See above comment about why warning is commented out */
2084 /* warning ("In stub for %s; unable to find real function/line info", DEPRECATED_SYMBOL_NAME (msymbol)) */ ;
2087 return find_pc_line (SYMBOL_VALUE (mfunsym), 0);
2091 s = find_pc_sect_symtab (pc, section);
2094 /* if no symbol information, return previous pc */
2101 bv = BLOCKVECTOR (s);
2103 /* Look at all the symtabs that share this blockvector.
2104 They all have the same apriori range, that we found was right;
2105 but they have different line tables. */
2107 for (; s && BLOCKVECTOR (s) == bv; s = s->next)
2109 /* Find the best line in this symtab. */
2116 /* I think len can be zero if the symtab lacks line numbers
2117 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2118 I'm not sure which, and maybe it depends on the symbol
2124 item = l->item; /* Get first line info */
2126 /* Is this file's first line closer than the first lines of other files?
2127 If so, record this file, and its first line, as best alternate. */
2128 if (item->pc > pc && (!alt || item->pc < alt->pc))
2134 for (i = 0; i < len; i++, item++)
2136 /* Leave prev pointing to the linetable entry for the last line
2137 that started at or before PC. */
2144 /* At this point, prev points at the line whose start addr is <= pc, and
2145 item points at the next line. If we ran off the end of the linetable
2146 (pc >= start of the last line), then prev == item. If pc < start of
2147 the first line, prev will not be set. */
2149 /* Is this file's best line closer than the best in the other files?
2150 If so, record this file, and its best line, as best so far. Don't
2151 save prev if it represents the end of a function (i.e. line number
2152 0) instead of a real line. */
2154 if (prev && prev->line && (!best || prev->pc > best->pc))
2159 /* Discard BEST_END if it's before the PC of the current BEST. */
2160 if (best_end <= best->pc)
2164 /* If another line (denoted by ITEM) is in the linetable and its
2165 PC is after BEST's PC, but before the current BEST_END, then
2166 use ITEM's PC as the new best_end. */
2167 if (best && i < len && item->pc > best->pc
2168 && (best_end == 0 || best_end > item->pc))
2169 best_end = item->pc;
2175 { /* If we didn't find any line # info, just
2181 val.symtab = alt_symtab;
2182 val.line = alt->line - 1;
2184 /* Don't return line 0, that means that we didn't find the line. */
2188 val.pc = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2192 else if (best->line == 0)
2194 /* If our best fit is in a range of PC's for which no line
2195 number info is available (line number is zero) then we didn't
2196 find any valid line information. */
2201 val.symtab = best_symtab;
2202 val.line = best->line;
2204 if (best_end && (!alt || best_end < alt->pc))
2209 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2211 val.section = section;
2215 /* Backward compatibility (no section) */
2217 struct symtab_and_line
2218 find_pc_line (CORE_ADDR pc, int notcurrent)
2222 section = find_pc_overlay (pc);
2223 if (pc_in_unmapped_range (pc, section))
2224 pc = overlay_mapped_address (pc, section);
2225 return find_pc_sect_line (pc, section, notcurrent);
2228 /* Find line number LINE in any symtab whose name is the same as
2231 If found, return the symtab that contains the linetable in which it was
2232 found, set *INDEX to the index in the linetable of the best entry
2233 found, and set *EXACT_MATCH nonzero if the value returned is an
2236 If not found, return NULL. */
2239 find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match)
2243 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2247 struct linetable *best_linetable;
2248 struct symtab *best_symtab;
2250 /* First try looking it up in the given symtab. */
2251 best_linetable = LINETABLE (symtab);
2252 best_symtab = symtab;
2253 best_index = find_line_common (best_linetable, line, &exact);
2254 if (best_index < 0 || !exact)
2256 /* Didn't find an exact match. So we better keep looking for
2257 another symtab with the same name. In the case of xcoff,
2258 multiple csects for one source file (produced by IBM's FORTRAN
2259 compiler) produce multiple symtabs (this is unavoidable
2260 assuming csects can be at arbitrary places in memory and that
2261 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2263 /* BEST is the smallest linenumber > LINE so far seen,
2264 or 0 if none has been seen so far.
2265 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2268 struct objfile *objfile;
2271 if (best_index >= 0)
2272 best = best_linetable->item[best_index].line;
2276 ALL_SYMTABS (objfile, s)
2278 struct linetable *l;
2281 if (!STREQ (symtab->filename, s->filename))
2284 ind = find_line_common (l, line, &exact);
2294 if (best == 0 || l->item[ind].line < best)
2296 best = l->item[ind].line;
2309 *index = best_index;
2311 *exact_match = exact;
2316 /* Set the PC value for a given source file and line number and return true.
2317 Returns zero for invalid line number (and sets the PC to 0).
2318 The source file is specified with a struct symtab. */
2321 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2323 struct linetable *l;
2330 symtab = find_line_symtab (symtab, line, &ind, NULL);
2333 l = LINETABLE (symtab);
2334 *pc = l->item[ind].pc;
2341 /* Find the range of pc values in a line.
2342 Store the starting pc of the line into *STARTPTR
2343 and the ending pc (start of next line) into *ENDPTR.
2344 Returns 1 to indicate success.
2345 Returns 0 if could not find the specified line. */
2348 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2351 CORE_ADDR startaddr;
2352 struct symtab_and_line found_sal;
2355 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2358 /* This whole function is based on address. For example, if line 10 has
2359 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2360 "info line *0x123" should say the line goes from 0x100 to 0x200
2361 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2362 This also insures that we never give a range like "starts at 0x134
2363 and ends at 0x12c". */
2365 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2366 if (found_sal.line != sal.line)
2368 /* The specified line (sal) has zero bytes. */
2369 *startptr = found_sal.pc;
2370 *endptr = found_sal.pc;
2374 *startptr = found_sal.pc;
2375 *endptr = found_sal.end;
2380 /* Given a line table and a line number, return the index into the line
2381 table for the pc of the nearest line whose number is >= the specified one.
2382 Return -1 if none is found. The value is >= 0 if it is an index.
2384 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2387 find_line_common (register struct linetable *l, register int lineno,
2393 /* BEST is the smallest linenumber > LINENO so far seen,
2394 or 0 if none has been seen so far.
2395 BEST_INDEX identifies the item for it. */
2397 int best_index = -1;
2406 for (i = 0; i < len; i++)
2408 register struct linetable_entry *item = &(l->item[i]);
2410 if (item->line == lineno)
2412 /* Return the first (lowest address) entry which matches. */
2417 if (item->line > lineno && (best == 0 || item->line < best))
2424 /* If we got here, we didn't get an exact match. */
2431 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2433 struct symtab_and_line sal;
2434 sal = find_pc_line (pc, 0);
2437 return sal.symtab != 0;
2440 /* Given a function symbol SYM, find the symtab and line for the start
2442 If the argument FUNFIRSTLINE is nonzero, we want the first line
2443 of real code inside the function. */
2445 struct symtab_and_line
2446 find_function_start_sal (struct symbol *sym, int funfirstline)
2449 struct symtab_and_line sal;
2451 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2452 fixup_symbol_section (sym, NULL);
2454 { /* skip "first line" of function (which is actually its prologue) */
2455 asection *section = SYMBOL_BFD_SECTION (sym);
2456 /* If function is in an unmapped overlay, use its unmapped LMA
2457 address, so that SKIP_PROLOGUE has something unique to work on */
2458 if (section_is_overlay (section) &&
2459 !section_is_mapped (section))
2460 pc = overlay_unmapped_address (pc, section);
2462 pc += FUNCTION_START_OFFSET;
2463 pc = SKIP_PROLOGUE (pc);
2465 /* For overlays, map pc back into its mapped VMA range */
2466 pc = overlay_mapped_address (pc, section);
2468 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2470 #ifdef PROLOGUE_FIRSTLINE_OVERLAP
2471 /* Convex: no need to suppress code on first line, if any */
2474 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
2475 line is still part of the same function. */
2477 && BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= sal.end
2478 && sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2480 /* First pc of next line */
2482 /* Recalculate the line number (might not be N+1). */
2483 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2491 /* If P is of the form "operator[ \t]+..." where `...' is
2492 some legitimate operator text, return a pointer to the
2493 beginning of the substring of the operator text.
2494 Otherwise, return "". */
2496 operator_chars (char *p, char **end)
2499 if (strncmp (p, "operator", 8))
2503 /* Don't get faked out by `operator' being part of a longer
2505 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2508 /* Allow some whitespace between `operator' and the operator symbol. */
2509 while (*p == ' ' || *p == '\t')
2512 /* Recognize 'operator TYPENAME'. */
2514 if (isalpha (*p) || *p == '_' || *p == '$')
2516 register char *q = p + 1;
2517 while (isalnum (*q) || *q == '_' || *q == '$')
2526 case '\\': /* regexp quoting */
2529 if (p[2] == '=') /* 'operator\*=' */
2531 else /* 'operator\*' */
2535 else if (p[1] == '[')
2538 error ("mismatched quoting on brackets, try 'operator\\[\\]'");
2539 else if (p[2] == '\\' && p[3] == ']')
2541 *end = p + 4; /* 'operator\[\]' */
2545 error ("nothing is allowed between '[' and ']'");
2549 /* Gratuitous qoute: skip it and move on. */
2571 if (p[0] == '-' && p[1] == '>')
2573 /* Struct pointer member operator 'operator->'. */
2576 *end = p + 3; /* 'operator->*' */
2579 else if (p[2] == '\\')
2581 *end = p + 4; /* Hopefully 'operator->\*' */
2586 *end = p + 2; /* 'operator->' */
2590 if (p[1] == '=' || p[1] == p[0])
2601 error ("`operator ()' must be specified without whitespace in `()'");
2606 error ("`operator ?:' must be specified without whitespace in `?:'");
2611 error ("`operator []' must be specified without whitespace in `[]'");
2615 error ("`operator %s' not supported", p);
2624 /* If FILE is not already in the table of files, return zero;
2625 otherwise return non-zero. Optionally add FILE to the table if ADD
2626 is non-zero. If *FIRST is non-zero, forget the old table
2629 filename_seen (const char *file, int add, int *first)
2631 /* Table of files seen so far. */
2632 static const char **tab = NULL;
2633 /* Allocated size of tab in elements.
2634 Start with one 256-byte block (when using GNU malloc.c).
2635 24 is the malloc overhead when range checking is in effect. */
2636 static int tab_alloc_size = (256 - 24) / sizeof (char *);
2637 /* Current size of tab in elements. */
2638 static int tab_cur_size;
2644 tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
2648 /* Is FILE in tab? */
2649 for (p = tab; p < tab + tab_cur_size; p++)
2650 if (strcmp (*p, file) == 0)
2653 /* No; maybe add it to tab. */
2656 if (tab_cur_size == tab_alloc_size)
2658 tab_alloc_size *= 2;
2659 tab = (const char **) xrealloc ((char *) tab,
2660 tab_alloc_size * sizeof (*tab));
2662 tab[tab_cur_size++] = file;
2668 /* Slave routine for sources_info. Force line breaks at ,'s.
2669 NAME is the name to print and *FIRST is nonzero if this is the first
2670 name printed. Set *FIRST to zero. */
2672 output_source_filename (char *name, int *first)
2674 /* Since a single source file can result in several partial symbol
2675 tables, we need to avoid printing it more than once. Note: if
2676 some of the psymtabs are read in and some are not, it gets
2677 printed both under "Source files for which symbols have been
2678 read" and "Source files for which symbols will be read in on
2679 demand". I consider this a reasonable way to deal with the
2680 situation. I'm not sure whether this can also happen for
2681 symtabs; it doesn't hurt to check. */
2683 /* Was NAME already seen? */
2684 if (filename_seen (name, 1, first))
2686 /* Yes; don't print it again. */
2689 /* No; print it and reset *FIRST. */
2696 printf_filtered (", ");
2700 fputs_filtered (name, gdb_stdout);
2704 sources_info (char *ignore, int from_tty)
2706 register struct symtab *s;
2707 register struct partial_symtab *ps;
2708 register struct objfile *objfile;
2711 if (!have_full_symbols () && !have_partial_symbols ())
2713 error ("No symbol table is loaded. Use the \"file\" command.");
2716 printf_filtered ("Source files for which symbols have been read in:\n\n");
2719 ALL_SYMTABS (objfile, s)
2721 output_source_filename (s->filename, &first);
2723 printf_filtered ("\n\n");
2725 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2728 ALL_PSYMTABS (objfile, ps)
2732 output_source_filename (ps->filename, &first);
2735 printf_filtered ("\n");
2739 file_matches (char *file, char *files[], int nfiles)
2743 if (file != NULL && nfiles != 0)
2745 for (i = 0; i < nfiles; i++)
2747 if (strcmp (files[i], lbasename (file)) == 0)
2751 else if (nfiles == 0)
2756 /* Free any memory associated with a search. */
2758 free_search_symbols (struct symbol_search *symbols)
2760 struct symbol_search *p;
2761 struct symbol_search *next;
2763 for (p = symbols; p != NULL; p = next)
2771 do_free_search_symbols_cleanup (void *symbols)
2773 free_search_symbols (symbols);
2777 make_cleanup_free_search_symbols (struct symbol_search *symbols)
2779 return make_cleanup (do_free_search_symbols_cleanup, symbols);
2782 /* Helper function for sort_search_symbols and qsort. Can only
2783 sort symbols, not minimal symbols. */
2785 compare_search_syms (const void *sa, const void *sb)
2787 struct symbol_search **sym_a = (struct symbol_search **) sa;
2788 struct symbol_search **sym_b = (struct symbol_search **) sb;
2790 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
2791 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
2794 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2795 prevtail where it is, but update its next pointer to point to
2796 the first of the sorted symbols. */
2797 static struct symbol_search *
2798 sort_search_symbols (struct symbol_search *prevtail, int nfound)
2800 struct symbol_search **symbols, *symp, *old_next;
2803 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
2805 symp = prevtail->next;
2806 for (i = 0; i < nfound; i++)
2811 /* Generally NULL. */
2814 qsort (symbols, nfound, sizeof (struct symbol_search *),
2815 compare_search_syms);
2818 for (i = 0; i < nfound; i++)
2820 symp->next = symbols[i];
2823 symp->next = old_next;
2829 /* Search the symbol table for matches to the regular expression REGEXP,
2830 returning the results in *MATCHES.
2832 Only symbols of KIND are searched:
2833 FUNCTIONS_DOMAIN - search all functions
2834 TYPES_DOMAIN - search all type names
2835 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2836 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2837 and constants (enums)
2839 free_search_symbols should be called when *MATCHES is no longer needed.
2841 The results are sorted locally; each symtab's global and static blocks are
2842 separately alphabetized.
2845 search_symbols (char *regexp, domain_enum kind, int nfiles, char *files[],
2846 struct symbol_search **matches)
2848 register struct symtab *s;
2849 register struct partial_symtab *ps;
2850 register struct blockvector *bv;
2851 struct blockvector *prev_bv = 0;
2852 register struct block *b;
2855 register struct symbol *sym;
2856 struct partial_symbol **psym;
2857 struct objfile *objfile;
2858 struct minimal_symbol *msymbol;
2861 static enum minimal_symbol_type types[]
2863 {mst_data, mst_text, mst_abs, mst_unknown};
2864 static enum minimal_symbol_type types2[]
2866 {mst_bss, mst_file_text, mst_abs, mst_unknown};
2867 static enum minimal_symbol_type types3[]
2869 {mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
2870 static enum minimal_symbol_type types4[]
2872 {mst_file_bss, mst_text, mst_abs, mst_unknown};
2873 enum minimal_symbol_type ourtype;
2874 enum minimal_symbol_type ourtype2;
2875 enum minimal_symbol_type ourtype3;
2876 enum minimal_symbol_type ourtype4;
2877 struct symbol_search *sr;
2878 struct symbol_search *psr;
2879 struct symbol_search *tail;
2880 struct cleanup *old_chain = NULL;
2882 if (kind < VARIABLES_DOMAIN)
2883 error ("must search on specific domain");
2885 ourtype = types[(int) (kind - VARIABLES_DOMAIN)];
2886 ourtype2 = types2[(int) (kind - VARIABLES_DOMAIN)];
2887 ourtype3 = types3[(int) (kind - VARIABLES_DOMAIN)];
2888 ourtype4 = types4[(int) (kind - VARIABLES_DOMAIN)];
2890 sr = *matches = NULL;
2895 /* Make sure spacing is right for C++ operators.
2896 This is just a courtesy to make the matching less sensitive
2897 to how many spaces the user leaves between 'operator'
2898 and <TYPENAME> or <OPERATOR>. */
2900 char *opname = operator_chars (regexp, &opend);
2903 int fix = -1; /* -1 means ok; otherwise number of spaces needed. */
2904 if (isalpha (*opname) || *opname == '_' || *opname == '$')
2906 /* There should 1 space between 'operator' and 'TYPENAME'. */
2907 if (opname[-1] != ' ' || opname[-2] == ' ')
2912 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
2913 if (opname[-1] == ' ')
2916 /* If wrong number of spaces, fix it. */
2919 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
2920 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
2925 if (0 != (val = re_comp (regexp)))
2926 error ("Invalid regexp (%s): %s", val, regexp);
2929 /* Search through the partial symtabs *first* for all symbols
2930 matching the regexp. That way we don't have to reproduce all of
2931 the machinery below. */
2933 ALL_PSYMTABS (objfile, ps)
2935 struct partial_symbol **bound, **gbound, **sbound;
2941 gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms;
2942 sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms;
2945 /* Go through all of the symbols stored in a partial
2946 symtab in one loop. */
2947 psym = objfile->global_psymbols.list + ps->globals_offset;
2952 if (bound == gbound && ps->n_static_syms != 0)
2954 psym = objfile->static_psymbols.list + ps->statics_offset;
2965 /* If it would match (logic taken from loop below)
2966 load the file and go on to the next one */
2967 if (file_matches (ps->filename, files, nfiles)
2969 || re_exec (SYMBOL_NATURAL_NAME (*psym)) != 0)
2970 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (*psym) != LOC_TYPEDEF
2971 && SYMBOL_CLASS (*psym) != LOC_BLOCK)
2972 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK)
2973 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (*psym) == LOC_TYPEDEF)
2974 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK))))
2976 PSYMTAB_TO_SYMTAB (ps);
2984 /* Here, we search through the minimal symbol tables for functions
2985 and variables that match, and force their symbols to be read.
2986 This is in particular necessary for demangled variable names,
2987 which are no longer put into the partial symbol tables.
2988 The symbol will then be found during the scan of symtabs below.
2990 For functions, find_pc_symtab should succeed if we have debug info
2991 for the function, for variables we have to call lookup_symbol
2992 to determine if the variable has debug info.
2993 If the lookup fails, set found_misc so that we will rescan to print
2994 any matching symbols without debug info.
2997 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
2999 ALL_MSYMBOLS (objfile, msymbol)
3001 if (MSYMBOL_TYPE (msymbol) == ourtype ||
3002 MSYMBOL_TYPE (msymbol) == ourtype2 ||
3003 MSYMBOL_TYPE (msymbol) == ourtype3 ||
3004 MSYMBOL_TYPE (msymbol) == ourtype4)
3007 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
3009 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
3011 /* FIXME: carlton/2003-02-04: Given that the
3012 semantics of lookup_symbol keeps on changing
3013 slightly, it would be a nice idea if we had a
3014 function lookup_symbol_minsym that found the
3015 symbol associated to a given minimal symbol (if
3017 if (kind == FUNCTIONS_DOMAIN
3018 || lookup_symbol (DEPRECATED_SYMBOL_NAME (msymbol),
3019 (struct block *) NULL,
3021 0, (struct symtab **) NULL) == NULL)
3029 ALL_SYMTABS (objfile, s)
3031 bv = BLOCKVECTOR (s);
3032 /* Often many files share a blockvector.
3033 Scan each blockvector only once so that
3034 we don't get every symbol many times.
3035 It happens that the first symtab in the list
3036 for any given blockvector is the main file. */
3038 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
3040 struct symbol_search *prevtail = tail;
3042 b = BLOCKVECTOR_BLOCK (bv, i);
3043 ALL_BLOCK_SYMBOLS (b, j, sym)
3046 if (file_matches (s->filename, files, nfiles)
3048 || re_exec (SYMBOL_NATURAL_NAME (sym)) != 0)
3049 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (sym) != LOC_TYPEDEF
3050 && SYMBOL_CLASS (sym) != LOC_BLOCK
3051 && SYMBOL_CLASS (sym) != LOC_CONST)
3052 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK)
3053 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3054 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK))))
3057 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3061 psr->msymbol = NULL;
3073 if (prevtail == NULL)
3075 struct symbol_search dummy;
3078 tail = sort_search_symbols (&dummy, nfound);
3081 old_chain = make_cleanup_free_search_symbols (sr);
3084 tail = sort_search_symbols (prevtail, nfound);
3090 /* If there are no eyes, avoid all contact. I mean, if there are
3091 no debug symbols, then print directly from the msymbol_vector. */
3093 if (found_misc || kind != FUNCTIONS_DOMAIN)
3095 ALL_MSYMBOLS (objfile, msymbol)
3097 if (MSYMBOL_TYPE (msymbol) == ourtype ||
3098 MSYMBOL_TYPE (msymbol) == ourtype2 ||
3099 MSYMBOL_TYPE (msymbol) == ourtype3 ||
3100 MSYMBOL_TYPE (msymbol) == ourtype4)
3103 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
3105 /* Functions: Look up by address. */
3106 if (kind != FUNCTIONS_DOMAIN ||
3107 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
3109 /* Variables/Absolutes: Look up by name */
3110 if (lookup_symbol (DEPRECATED_SYMBOL_NAME (msymbol),
3111 (struct block *) NULL, VAR_DOMAIN,
3112 0, (struct symtab **) NULL) == NULL)
3115 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3117 psr->msymbol = msymbol;
3124 old_chain = make_cleanup_free_search_symbols (sr);
3138 discard_cleanups (old_chain);
3141 /* Helper function for symtab_symbol_info, this function uses
3142 the data returned from search_symbols() to print information
3143 regarding the match to gdb_stdout.
3146 print_symbol_info (domain_enum kind, struct symtab *s, struct symbol *sym,
3147 int block, char *last)
3149 if (last == NULL || strcmp (last, s->filename) != 0)
3151 fputs_filtered ("\nFile ", gdb_stdout);
3152 fputs_filtered (s->filename, gdb_stdout);
3153 fputs_filtered (":\n", gdb_stdout);
3156 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3157 printf_filtered ("static ");
3159 /* Typedef that is not a C++ class */
3160 if (kind == TYPES_DOMAIN
3161 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3162 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3163 /* variable, func, or typedef-that-is-c++-class */
3164 else if (kind < TYPES_DOMAIN ||
3165 (kind == TYPES_DOMAIN &&
3166 SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3168 type_print (SYMBOL_TYPE (sym),
3169 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3170 ? "" : SYMBOL_PRINT_NAME (sym)),
3173 printf_filtered (";\n");
3177 /* This help function for symtab_symbol_info() prints information
3178 for non-debugging symbols to gdb_stdout.
3181 print_msymbol_info (struct minimal_symbol *msymbol)
3185 if (TARGET_ADDR_BIT <= 32)
3186 tmp = local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3187 & (CORE_ADDR) 0xffffffff,
3190 tmp = local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3192 printf_filtered ("%s %s\n",
3193 tmp, SYMBOL_PRINT_NAME (msymbol));
3196 /* This is the guts of the commands "info functions", "info types", and
3197 "info variables". It calls search_symbols to find all matches and then
3198 print_[m]symbol_info to print out some useful information about the
3202 symtab_symbol_info (char *regexp, domain_enum kind, int from_tty)
3204 static char *classnames[]
3206 {"variable", "function", "type", "method"};
3207 struct symbol_search *symbols;
3208 struct symbol_search *p;
3209 struct cleanup *old_chain;
3210 char *last_filename = NULL;
3213 /* must make sure that if we're interrupted, symbols gets freed */
3214 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3215 old_chain = make_cleanup_free_search_symbols (symbols);
3217 printf_filtered (regexp
3218 ? "All %ss matching regular expression \"%s\":\n"
3219 : "All defined %ss:\n",
3220 classnames[(int) (kind - VARIABLES_DOMAIN)], regexp);
3222 for (p = symbols; p != NULL; p = p->next)
3226 if (p->msymbol != NULL)
3230 printf_filtered ("\nNon-debugging symbols:\n");
3233 print_msymbol_info (p->msymbol);
3237 print_symbol_info (kind,
3242 last_filename = p->symtab->filename;
3246 do_cleanups (old_chain);
3250 variables_info (char *regexp, int from_tty)
3252 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3256 functions_info (char *regexp, int from_tty)
3258 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3263 types_info (char *regexp, int from_tty)
3265 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3268 /* Breakpoint all functions matching regular expression. */
3271 rbreak_command_wrapper (char *regexp, int from_tty)
3273 rbreak_command (regexp, from_tty);
3277 rbreak_command (char *regexp, int from_tty)
3279 struct symbol_search *ss;
3280 struct symbol_search *p;
3281 struct cleanup *old_chain;
3283 search_symbols (regexp, FUNCTIONS_DOMAIN, 0, (char **) NULL, &ss);
3284 old_chain = make_cleanup_free_search_symbols (ss);
3286 for (p = ss; p != NULL; p = p->next)
3288 if (p->msymbol == NULL)
3290 char *string = (char *) alloca (strlen (p->symtab->filename)
3291 + strlen (DEPRECATED_SYMBOL_NAME (p->symbol))
3293 strcpy (string, p->symtab->filename);
3294 strcat (string, ":'");
3295 strcat (string, DEPRECATED_SYMBOL_NAME (p->symbol));
3296 strcat (string, "'");
3297 break_command (string, from_tty);
3298 print_symbol_info (FUNCTIONS_DOMAIN,
3302 p->symtab->filename);
3306 break_command (DEPRECATED_SYMBOL_NAME (p->msymbol), from_tty);
3307 printf_filtered ("<function, no debug info> %s;\n",
3308 SYMBOL_PRINT_NAME (p->msymbol));
3312 do_cleanups (old_chain);
3316 /* Helper routine for make_symbol_completion_list. */
3318 static int return_val_size;
3319 static int return_val_index;
3320 static char **return_val;
3322 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3324 if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) \
3325 /* Put only the mangled name on the list. */ \
3326 /* Advantage: "b foo<TAB>" completes to "b foo(int, int)" */ \
3327 /* Disadvantage: "b foo__i<TAB>" doesn't complete. */ \
3328 completion_list_add_name \
3329 (SYMBOL_DEMANGLED_NAME (symbol), (sym_text), (len), (text), (word)); \
3331 completion_list_add_name \
3332 (DEPRECATED_SYMBOL_NAME (symbol), (sym_text), (len), (text), (word)); \
3335 /* Test to see if the symbol specified by SYMNAME (which is already
3336 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3337 characters. If so, add it to the current completion list. */
3340 completion_list_add_name (char *symname, char *sym_text, int sym_text_len,
3341 char *text, char *word)
3346 /* clip symbols that cannot match */
3348 if (strncmp (symname, sym_text, sym_text_len) != 0)
3353 /* We have a match for a completion, so add SYMNAME to the current list
3354 of matches. Note that the name is moved to freshly malloc'd space. */
3358 if (word == sym_text)
3360 new = xmalloc (strlen (symname) + 5);
3361 strcpy (new, symname);
3363 else if (word > sym_text)
3365 /* Return some portion of symname. */
3366 new = xmalloc (strlen (symname) + 5);
3367 strcpy (new, symname + (word - sym_text));
3371 /* Return some of SYM_TEXT plus symname. */
3372 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
3373 strncpy (new, word, sym_text - word);
3374 new[sym_text - word] = '\0';
3375 strcat (new, symname);
3378 if (return_val_index + 3 > return_val_size)
3380 newsize = (return_val_size *= 2) * sizeof (char *);
3381 return_val = (char **) xrealloc ((char *) return_val, newsize);
3383 return_val[return_val_index++] = new;
3384 return_val[return_val_index] = NULL;
3388 /* ObjC: In case we are completing on a selector, look as the msymbol
3389 again and feed all the selectors into the mill. */
3392 completion_list_objc_symbol (struct minimal_symbol *msymbol, char *sym_text,
3393 int sym_text_len, char *text, char *word)
3395 static char *tmp = NULL;
3396 static unsigned int tmplen = 0;
3398 char *method, *category, *selector;
3401 method = SYMBOL_NATURAL_NAME (msymbol);
3403 /* Is it a method? */
3404 if ((method[0] != '-') && (method[0] != '+'))
3407 if (sym_text[0] == '[')
3408 /* Complete on shortened method method. */
3409 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
3411 while ((strlen (method) + 1) >= tmplen)
3417 tmp = xrealloc (tmp, tmplen);
3419 selector = strchr (method, ' ');
3420 if (selector != NULL)
3423 category = strchr (method, '(');
3425 if ((category != NULL) && (selector != NULL))
3427 memcpy (tmp, method, (category - method));
3428 tmp[category - method] = ' ';
3429 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
3430 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3431 if (sym_text[0] == '[')
3432 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
3435 if (selector != NULL)
3437 /* Complete on selector only. */
3438 strcpy (tmp, selector);
3439 tmp2 = strchr (tmp, ']');
3443 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3447 /* Break the non-quoted text based on the characters which are in
3448 symbols. FIXME: This should probably be language-specific. */
3451 language_search_unquoted_string (char *text, char *p)
3453 for (; p > text; --p)
3455 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3459 if ((current_language->la_language == language_objc))
3461 if (p[-1] == ':') /* might be part of a method name */
3463 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
3464 p -= 2; /* beginning of a method name */
3465 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
3466 { /* might be part of a method name */
3469 /* Seeing a ' ' or a '(' is not conclusive evidence
3470 that we are in the middle of a method name. However,
3471 finding "-[" or "+[" should be pretty un-ambiguous.
3472 Unfortunately we have to find it now to decide. */
3475 if (isalnum (t[-1]) || t[-1] == '_' ||
3476 t[-1] == ' ' || t[-1] == ':' ||
3477 t[-1] == '(' || t[-1] == ')')
3482 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
3483 p = t - 2; /* method name detected */
3484 /* else we leave with p unchanged */
3494 /* Return a NULL terminated array of all symbols (regardless of class)
3495 which begin by matching TEXT. If the answer is no symbols, then
3496 the return value is an array which contains only a NULL pointer.
3498 Problem: All of the symbols have to be copied because readline frees them.
3499 I'm not going to worry about this; hopefully there won't be that many. */
3502 make_symbol_completion_list (char *text, char *word)
3504 register struct symbol *sym;
3505 register struct symtab *s;
3506 register struct partial_symtab *ps;
3507 register struct minimal_symbol *msymbol;
3508 register struct objfile *objfile;
3509 register struct block *b, *surrounding_static_block = 0;
3511 struct partial_symbol **psym;
3512 /* The symbol we are completing on. Points in same buffer as text. */
3514 /* Length of sym_text. */
3517 /* Now look for the symbol we are supposed to complete on.
3518 FIXME: This should be language-specific. */
3522 char *quote_pos = NULL;
3524 /* First see if this is a quoted string. */
3526 for (p = text; *p != '\0'; ++p)
3528 if (quote_found != '\0')
3530 if (*p == quote_found)
3531 /* Found close quote. */
3533 else if (*p == '\\' && p[1] == quote_found)
3534 /* A backslash followed by the quote character
3535 doesn't end the string. */
3538 else if (*p == '\'' || *p == '"')
3544 if (quote_found == '\'')
3545 /* A string within single quotes can be a symbol, so complete on it. */
3546 sym_text = quote_pos + 1;
3547 else if (quote_found == '"')
3548 /* A double-quoted string is never a symbol, nor does it make sense
3549 to complete it any other way. */
3551 return_val = (char **) xmalloc (sizeof (char *));
3552 return_val[0] = NULL;
3557 /* It is not a quoted string. Break it based on the characters
3558 which are in symbols. */
3561 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3570 sym_text_len = strlen (sym_text);
3572 return_val_size = 100;
3573 return_val_index = 0;
3574 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3575 return_val[0] = NULL;
3577 /* Look through the partial symtabs for all symbols which begin
3578 by matching SYM_TEXT. Add each one that you find to the list. */
3580 ALL_PSYMTABS (objfile, ps)
3582 /* If the psymtab's been read in we'll get it when we search
3583 through the blockvector. */
3587 for (psym = objfile->global_psymbols.list + ps->globals_offset;
3588 psym < (objfile->global_psymbols.list + ps->globals_offset
3589 + ps->n_global_syms);
3592 /* If interrupted, then quit. */
3594 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3597 for (psym = objfile->static_psymbols.list + ps->statics_offset;
3598 psym < (objfile->static_psymbols.list + ps->statics_offset
3599 + ps->n_static_syms);
3603 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3607 /* At this point scan through the misc symbol vectors and add each
3608 symbol you find to the list. Eventually we want to ignore
3609 anything that isn't a text symbol (everything else will be
3610 handled by the psymtab code above). */
3612 ALL_MSYMBOLS (objfile, msymbol)
3615 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
3617 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
3620 /* Search upwards from currently selected frame (so that we can
3621 complete on local vars. */
3623 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
3625 if (!BLOCK_SUPERBLOCK (b))
3627 surrounding_static_block = b; /* For elmin of dups */
3630 /* Also catch fields of types defined in this places which match our
3631 text string. Only complete on types visible from current context. */
3633 ALL_BLOCK_SYMBOLS (b, i, sym)
3636 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3637 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3639 struct type *t = SYMBOL_TYPE (sym);
3640 enum type_code c = TYPE_CODE (t);
3642 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
3644 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
3646 if (TYPE_FIELD_NAME (t, j))
3648 completion_list_add_name (TYPE_FIELD_NAME (t, j),
3649 sym_text, sym_text_len, text, word);
3657 /* Go through the symtabs and check the externs and statics for
3658 symbols which match. */
3660 ALL_SYMTABS (objfile, s)
3663 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3664 ALL_BLOCK_SYMBOLS (b, i, sym)
3666 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3670 ALL_SYMTABS (objfile, s)
3673 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3674 /* Don't do this block twice. */
3675 if (b == surrounding_static_block)
3677 ALL_BLOCK_SYMBOLS (b, i, sym)
3679 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3683 return (return_val);
3686 /* Like make_symbol_completion_list, but returns a list of symbols
3687 defined in a source file FILE. */
3690 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
3692 register struct symbol *sym;
3693 register struct symtab *s;
3694 register struct block *b;
3696 /* The symbol we are completing on. Points in same buffer as text. */
3698 /* Length of sym_text. */
3701 /* Now look for the symbol we are supposed to complete on.
3702 FIXME: This should be language-specific. */
3706 char *quote_pos = NULL;
3708 /* First see if this is a quoted string. */
3710 for (p = text; *p != '\0'; ++p)
3712 if (quote_found != '\0')
3714 if (*p == quote_found)
3715 /* Found close quote. */
3717 else if (*p == '\\' && p[1] == quote_found)
3718 /* A backslash followed by the quote character
3719 doesn't end the string. */
3722 else if (*p == '\'' || *p == '"')
3728 if (quote_found == '\'')
3729 /* A string within single quotes can be a symbol, so complete on it. */
3730 sym_text = quote_pos + 1;
3731 else if (quote_found == '"')
3732 /* A double-quoted string is never a symbol, nor does it make sense
3733 to complete it any other way. */
3735 return_val = (char **) xmalloc (sizeof (char *));
3736 return_val[0] = NULL;
3741 /* Not a quoted string. */
3742 sym_text = language_search_unquoted_string (text, p);
3746 sym_text_len = strlen (sym_text);
3748 return_val_size = 10;
3749 return_val_index = 0;
3750 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3751 return_val[0] = NULL;
3753 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3755 s = lookup_symtab (srcfile);
3758 /* Maybe they typed the file with leading directories, while the
3759 symbol tables record only its basename. */
3760 const char *tail = lbasename (srcfile);
3763 s = lookup_symtab (tail);
3766 /* If we have no symtab for that file, return an empty list. */
3768 return (return_val);
3770 /* Go through this symtab and check the externs and statics for
3771 symbols which match. */
3773 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3774 ALL_BLOCK_SYMBOLS (b, i, sym)
3776 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3779 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3780 ALL_BLOCK_SYMBOLS (b, i, sym)
3782 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3785 return (return_val);
3788 /* A helper function for make_source_files_completion_list. It adds
3789 another file name to a list of possible completions, growing the
3790 list as necessary. */
3793 add_filename_to_list (const char *fname, char *text, char *word,
3794 char ***list, int *list_used, int *list_alloced)
3797 size_t fnlen = strlen (fname);
3799 if (*list_used + 1 >= *list_alloced)
3802 *list = (char **) xrealloc ((char *) *list,
3803 *list_alloced * sizeof (char *));
3808 /* Return exactly fname. */
3809 new = xmalloc (fnlen + 5);
3810 strcpy (new, fname);
3812 else if (word > text)
3814 /* Return some portion of fname. */
3815 new = xmalloc (fnlen + 5);
3816 strcpy (new, fname + (word - text));
3820 /* Return some of TEXT plus fname. */
3821 new = xmalloc (fnlen + (text - word) + 5);
3822 strncpy (new, word, text - word);
3823 new[text - word] = '\0';
3824 strcat (new, fname);
3826 (*list)[*list_used] = new;
3827 (*list)[++*list_used] = NULL;
3831 not_interesting_fname (const char *fname)
3833 static const char *illegal_aliens[] = {
3834 "_globals_", /* inserted by coff_symtab_read */
3839 for (i = 0; illegal_aliens[i]; i++)
3841 if (strcmp (fname, illegal_aliens[i]) == 0)
3847 /* Return a NULL terminated array of all source files whose names
3848 begin with matching TEXT. The file names are looked up in the
3849 symbol tables of this program. If the answer is no matchess, then
3850 the return value is an array which contains only a NULL pointer. */
3853 make_source_files_completion_list (char *text, char *word)
3855 register struct symtab *s;
3856 register struct partial_symtab *ps;
3857 register struct objfile *objfile;
3859 int list_alloced = 1;
3861 size_t text_len = strlen (text);
3862 char **list = (char **) xmalloc (list_alloced * sizeof (char *));
3863 const char *base_name;
3867 if (!have_full_symbols () && !have_partial_symbols ())
3870 ALL_SYMTABS (objfile, s)
3872 if (not_interesting_fname (s->filename))
3874 if (!filename_seen (s->filename, 1, &first)
3875 #if HAVE_DOS_BASED_FILE_SYSTEM
3876 && strncasecmp (s->filename, text, text_len) == 0
3878 && strncmp (s->filename, text, text_len) == 0
3882 /* This file matches for a completion; add it to the current
3884 add_filename_to_list (s->filename, text, word,
3885 &list, &list_used, &list_alloced);
3889 /* NOTE: We allow the user to type a base name when the
3890 debug info records leading directories, but not the other
3891 way around. This is what subroutines of breakpoint
3892 command do when they parse file names. */
3893 base_name = lbasename (s->filename);
3894 if (base_name != s->filename
3895 && !filename_seen (base_name, 1, &first)
3896 #if HAVE_DOS_BASED_FILE_SYSTEM
3897 && strncasecmp (base_name, text, text_len) == 0
3899 && strncmp (base_name, text, text_len) == 0
3902 add_filename_to_list (base_name, text, word,
3903 &list, &list_used, &list_alloced);
3907 ALL_PSYMTABS (objfile, ps)
3909 if (not_interesting_fname (ps->filename))
3913 if (!filename_seen (ps->filename, 1, &first)
3914 #if HAVE_DOS_BASED_FILE_SYSTEM
3915 && strncasecmp (ps->filename, text, text_len) == 0
3917 && strncmp (ps->filename, text, text_len) == 0
3921 /* This file matches for a completion; add it to the
3922 current list of matches. */
3923 add_filename_to_list (ps->filename, text, word,
3924 &list, &list_used, &list_alloced);
3929 base_name = lbasename (ps->filename);
3930 if (base_name != ps->filename
3931 && !filename_seen (base_name, 1, &first)
3932 #if HAVE_DOS_BASED_FILE_SYSTEM
3933 && strncasecmp (base_name, text, text_len) == 0
3935 && strncmp (base_name, text, text_len) == 0
3938 add_filename_to_list (base_name, text, word,
3939 &list, &list_used, &list_alloced);
3947 /* Determine if PC is in the prologue of a function. The prologue is the area
3948 between the first instruction of a function, and the first executable line.
3949 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
3951 If non-zero, func_start is where we think the prologue starts, possibly
3952 by previous examination of symbol table information.
3956 in_prologue (CORE_ADDR pc, CORE_ADDR func_start)
3958 struct symtab_and_line sal;
3959 CORE_ADDR func_addr, func_end;
3961 /* We have several sources of information we can consult to figure
3963 - Compilers usually emit line number info that marks the prologue
3964 as its own "source line". So the ending address of that "line"
3965 is the end of the prologue. If available, this is the most
3967 - The minimal symbols and partial symbols, which can usually tell
3968 us the starting and ending addresses of a function.
3969 - If we know the function's start address, we can call the
3970 architecture-defined SKIP_PROLOGUE function to analyze the
3971 instruction stream and guess where the prologue ends.
3972 - Our `func_start' argument; if non-zero, this is the caller's
3973 best guess as to the function's entry point. At the time of
3974 this writing, handle_inferior_event doesn't get this right, so
3975 it should be our last resort. */
3977 /* Consult the partial symbol table, to find which function
3979 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
3981 CORE_ADDR prologue_end;
3983 /* We don't even have minsym information, so fall back to using
3984 func_start, if given. */
3986 return 1; /* We *might* be in a prologue. */
3988 prologue_end = SKIP_PROLOGUE (func_start);
3990 return func_start <= pc && pc < prologue_end;
3993 /* If we have line number information for the function, that's
3994 usually pretty reliable. */
3995 sal = find_pc_line (func_addr, 0);
3997 /* Now sal describes the source line at the function's entry point,
3998 which (by convention) is the prologue. The end of that "line",
3999 sal.end, is the end of the prologue.
4001 Note that, for functions whose source code is all on a single
4002 line, the line number information doesn't always end up this way.
4003 So we must verify that our purported end-of-prologue address is
4004 *within* the function, not at its start or end. */
4006 || sal.end <= func_addr
4007 || func_end <= sal.end)
4009 /* We don't have any good line number info, so use the minsym
4010 information, together with the architecture-specific prologue
4012 CORE_ADDR prologue_end = SKIP_PROLOGUE (func_addr);
4014 return func_addr <= pc && pc < prologue_end;
4017 /* We have line number info, and it looks good. */
4018 return func_addr <= pc && pc < sal.end;
4022 /* Begin overload resolution functions */
4025 remove_params (const char *demangled_name)
4031 if (demangled_name == NULL)
4034 /* First find the end of the arg list. */
4035 argp = strrchr (demangled_name, ')');
4039 /* Back up to the beginning. */
4042 while (argp-- > demangled_name)
4046 else if (*argp == '(')
4055 internal_error (__FILE__, __LINE__,
4056 "bad demangled name %s\n", demangled_name);
4057 while (argp[-1] == ' ' && argp > demangled_name)
4060 new_name = xmalloc (argp - demangled_name + 1);
4061 memcpy (new_name, demangled_name, argp - demangled_name);
4062 new_name[argp - demangled_name] = '\0';
4066 /* Helper routine for make_symbol_completion_list. */
4068 static int sym_return_val_size;
4069 static int sym_return_val_index;
4070 static struct symbol **sym_return_val;
4072 /* Test to see if the symbol specified by SYMNAME (which is already
4073 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4074 characters. If so, add it to the current completion list. */
4077 overload_list_add_symbol (struct symbol *sym, char *oload_name)
4083 /* If there is no type information, we can't do anything, so skip */
4084 if (SYMBOL_TYPE (sym) == NULL)
4087 /* skip any symbols that we've already considered. */
4088 for (i = 0; i < sym_return_val_index; ++i)
4089 if (!strcmp (DEPRECATED_SYMBOL_NAME (sym), DEPRECATED_SYMBOL_NAME (sym_return_val[i])))
4092 /* Get the demangled name without parameters */
4093 sym_name = remove_params (SYMBOL_DEMANGLED_NAME (sym));
4097 /* skip symbols that cannot match */
4098 if (strcmp (sym_name, oload_name) != 0)
4106 /* We have a match for an overload instance, so add SYM to the current list
4107 * of overload instances */
4108 if (sym_return_val_index + 3 > sym_return_val_size)
4110 newsize = (sym_return_val_size *= 2) * sizeof (struct symbol *);
4111 sym_return_val = (struct symbol **) xrealloc ((char *) sym_return_val, newsize);
4113 sym_return_val[sym_return_val_index++] = sym;
4114 sym_return_val[sym_return_val_index] = NULL;
4117 /* Return a null-terminated list of pointers to function symbols that
4118 * match name of the supplied symbol FSYM.
4119 * This is used in finding all overloaded instances of a function name.
4120 * This has been modified from make_symbol_completion_list. */
4124 make_symbol_overload_list (struct symbol *fsym)
4126 register struct symbol *sym;
4127 register struct symtab *s;
4128 register struct partial_symtab *ps;
4129 register struct objfile *objfile;
4130 register struct block *b, *surrounding_static_block = 0;
4132 /* The name we are completing on. */
4133 char *oload_name = NULL;
4134 /* Length of name. */
4135 int oload_name_len = 0;
4137 /* Look for the symbol we are supposed to complete on. */
4139 oload_name = remove_params (SYMBOL_DEMANGLED_NAME (fsym));
4142 sym_return_val_size = 1;
4143 sym_return_val = (struct symbol **) xmalloc (2 * sizeof (struct symbol *));
4144 sym_return_val[0] = fsym;
4145 sym_return_val[1] = NULL;
4147 return sym_return_val;
4149 oload_name_len = strlen (oload_name);
4151 sym_return_val_size = 100;
4152 sym_return_val_index = 0;
4153 sym_return_val = (struct symbol **) xmalloc ((sym_return_val_size + 1) * sizeof (struct symbol *));
4154 sym_return_val[0] = NULL;
4156 /* Read in all partial symtabs containing a partial symbol named
4159 ALL_PSYMTABS (objfile, ps)
4161 struct partial_symbol **psym;
4163 /* If the psymtab's been read in we'll get it when we search
4164 through the blockvector. */
4168 if ((lookup_partial_symbol (ps, oload_name, NULL, 1, VAR_DOMAIN)
4170 || (lookup_partial_symbol (ps, oload_name, NULL, 0, VAR_DOMAIN)
4172 PSYMTAB_TO_SYMTAB (ps);
4175 /* Search upwards from currently selected frame (so that we can
4176 complete on local vars. */
4178 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
4180 if (!BLOCK_SUPERBLOCK (b))
4182 surrounding_static_block = b; /* For elimination of dups */
4185 /* Also catch fields of types defined in this places which match our
4186 text string. Only complete on types visible from current context. */
4188 ALL_BLOCK_SYMBOLS (b, i, sym)
4190 overload_list_add_symbol (sym, oload_name);
4194 /* Go through the symtabs and check the externs and statics for
4195 symbols which match. */
4197 ALL_SYMTABS (objfile, s)
4200 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
4201 ALL_BLOCK_SYMBOLS (b, i, sym)
4203 overload_list_add_symbol (sym, oload_name);
4207 ALL_SYMTABS (objfile, s)
4210 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
4211 /* Don't do this block twice. */
4212 if (b == surrounding_static_block)
4214 ALL_BLOCK_SYMBOLS (b, i, sym)
4216 overload_list_add_symbol (sym, oload_name);
4222 return (sym_return_val);
4225 /* End of overload resolution functions */
4227 struct symtabs_and_lines
4228 decode_line_spec (char *string, int funfirstline)
4230 struct symtabs_and_lines sals;
4231 struct symtab_and_line cursal;
4234 error ("Empty line specification.");
4236 /* We use whatever is set as the current source line. We do not try
4237 and get a default or it will recursively call us! */
4238 cursal = get_current_source_symtab_and_line ();
4240 sals = decode_line_1 (&string, funfirstline,
4241 cursal.symtab, cursal.line,
4245 error ("Junk at end of line specification: %s", string);
4250 static char *name_of_main;
4253 set_main_name (const char *name)
4255 if (name_of_main != NULL)
4257 xfree (name_of_main);
4258 name_of_main = NULL;
4262 name_of_main = xstrdup (name);
4269 if (name_of_main != NULL)
4270 return name_of_main;
4277 _initialize_symtab (void)
4279 add_info ("variables", variables_info,
4280 "All global and static variable names, or those matching REGEXP.");
4282 add_com ("whereis", class_info, variables_info,
4283 "All global and static variable names, or those matching REGEXP.");
4285 add_info ("functions", functions_info,
4286 "All function names, or those matching REGEXP.");
4289 /* FIXME: This command has at least the following problems:
4290 1. It prints builtin types (in a very strange and confusing fashion).
4291 2. It doesn't print right, e.g. with
4292 typedef struct foo *FOO
4293 type_print prints "FOO" when we want to make it (in this situation)
4294 print "struct foo *".
4295 I also think "ptype" or "whatis" is more likely to be useful (but if
4296 there is much disagreement "info types" can be fixed). */
4297 add_info ("types", types_info,
4298 "All type names, or those matching REGEXP.");
4300 add_info ("sources", sources_info,
4301 "Source files in the program.");
4303 add_com ("rbreak", class_breakpoint, rbreak_command,
4304 "Set a breakpoint for all functions matching REGEXP.");
4308 add_com ("lf", class_info, sources_info, "Source files in the program");
4309 add_com ("lg", class_info, variables_info,
4310 "All global and static variable names, or those matching REGEXP.");
4313 /* Initialize the one built-in type that isn't language dependent... */
4314 builtin_type_error = init_type (TYPE_CODE_ERROR, 0, 0,
4315 "<unknown type>", (struct objfile *) NULL);