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, 2004
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"
49 #include "dictionary.h"
51 #include <sys/types.h>
53 #include "gdb_string.h"
58 /* Prototypes for local functions */
60 static void completion_list_add_name (char *, char *, int, char *, char *);
62 static void rbreak_command (char *, int);
64 static void types_info (char *, int);
66 static void functions_info (char *, int);
68 static void variables_info (char *, int);
70 static void sources_info (char *, int);
72 static void output_source_filename (char *, int *);
74 static int find_line_common (struct linetable *, int, int *);
76 /* This one is used by linespec.c */
78 char *operator_chars (char *p, char **end);
80 static struct symbol *lookup_symbol_aux (const char *name,
81 const char *linkage_name,
82 const struct block *block,
83 const domain_enum domain,
84 int *is_a_field_of_this,
85 struct symtab **symtab);
88 struct symbol *lookup_symbol_aux_local (const char *name,
89 const char *linkage_name,
90 const struct block *block,
91 const domain_enum domain,
92 struct symtab **symtab);
95 struct symbol *lookup_symbol_aux_symtabs (int block_index,
97 const char *linkage_name,
98 const domain_enum domain,
99 struct symtab **symtab);
102 struct symbol *lookup_symbol_aux_psymtabs (int block_index,
104 const char *linkage_name,
105 const domain_enum domain,
106 struct symtab **symtab);
110 struct symbol *lookup_symbol_aux_minsyms (const char *name,
111 const char *linkage_name,
112 const domain_enum domain,
113 int *is_a_field_of_this,
114 struct symtab **symtab);
117 /* This flag is used in hppa-tdep.c, and set in hp-symtab-read.c.
118 Signals the presence of objects compiled by HP compilers. */
119 int deprecated_hp_som_som_object_present = 0;
121 static void fixup_section (struct general_symbol_info *, struct objfile *);
123 static int file_matches (char *, char **, int);
125 static void print_symbol_info (domain_enum,
126 struct symtab *, struct symbol *, int, char *);
128 static void print_msymbol_info (struct minimal_symbol *);
130 static void symtab_symbol_info (char *, domain_enum, int);
132 void _initialize_symtab (void);
136 /* The single non-language-specific builtin type */
137 struct type *builtin_type_error;
139 /* Block in which the most recently searched-for symbol was found.
140 Might be better to make this a parameter to lookup_symbol and
143 const struct block *block_found;
145 /* Check for a symtab of a specific name; first in symtabs, then in
146 psymtabs. *If* there is no '/' in the name, a match after a '/'
147 in the symtab filename will also work. */
150 lookup_symtab (const char *name)
153 struct partial_symtab *ps;
154 struct objfile *objfile;
155 char *real_path = NULL;
156 char *full_path = NULL;
158 /* Here we are interested in canonicalizing an absolute path, not
159 absolutizing a relative path. */
160 if (IS_ABSOLUTE_PATH (name))
162 full_path = xfullpath (name);
163 make_cleanup (xfree, full_path);
164 real_path = gdb_realpath (name);
165 make_cleanup (xfree, real_path);
170 /* First, search for an exact match */
172 ALL_SYMTABS (objfile, s)
174 if (FILENAME_CMP (name, s->filename) == 0)
179 /* If the user gave us an absolute path, try to find the file in
180 this symtab and use its absolute path. */
182 if (full_path != NULL)
184 const char *fp = symtab_to_fullname (s);
185 if (FILENAME_CMP (full_path, fp) == 0)
191 if (real_path != NULL)
193 char *rp = gdb_realpath (symtab_to_fullname (s));
194 make_cleanup (xfree, rp);
195 if (FILENAME_CMP (real_path, rp) == 0)
202 /* Now, search for a matching tail (only if name doesn't have any dirs) */
204 if (lbasename (name) == name)
205 ALL_SYMTABS (objfile, s)
207 if (FILENAME_CMP (lbasename (s->filename), name) == 0)
211 /* Same search rules as above apply here, but now we look thru the
214 ps = lookup_partial_symtab (name);
219 error ("Internal: readin %s pst for `%s' found when no symtab found.",
222 s = PSYMTAB_TO_SYMTAB (ps);
227 /* At this point, we have located the psymtab for this file, but
228 the conversion to a symtab has failed. This usually happens
229 when we are looking up an include file. In this case,
230 PSYMTAB_TO_SYMTAB doesn't return a symtab, even though one has
231 been created. So, we need to run through the symtabs again in
232 order to find the file.
233 XXX - This is a crock, and should be fixed inside of the the
234 symbol parsing routines. */
238 /* Lookup the partial symbol table of a source file named NAME.
239 *If* there is no '/' in the name, a match after a '/'
240 in the psymtab filename will also work. */
242 struct partial_symtab *
243 lookup_partial_symtab (const char *name)
245 struct partial_symtab *pst;
246 struct objfile *objfile;
247 char *full_path = NULL;
248 char *real_path = NULL;
250 /* Here we are interested in canonicalizing an absolute path, not
251 absolutizing a relative path. */
252 if (IS_ABSOLUTE_PATH (name))
254 full_path = xfullpath (name);
255 make_cleanup (xfree, full_path);
256 real_path = gdb_realpath (name);
257 make_cleanup (xfree, real_path);
260 ALL_PSYMTABS (objfile, pst)
262 if (FILENAME_CMP (name, pst->filename) == 0)
267 /* If the user gave us an absolute path, try to find the file in
268 this symtab and use its absolute path. */
269 if (full_path != NULL)
271 if (pst->fullname == NULL)
272 source_full_path_of (pst->filename, &pst->fullname);
273 if (pst->fullname != NULL
274 && FILENAME_CMP (full_path, pst->fullname) == 0)
280 if (real_path != NULL)
283 if (pst->fullname == NULL)
284 source_full_path_of (pst->filename, &pst->fullname);
285 if (pst->fullname != NULL)
287 rp = gdb_realpath (pst->fullname);
288 make_cleanup (xfree, rp);
290 if (rp != NULL && FILENAME_CMP (real_path, rp) == 0)
297 /* Now, search for a matching tail (only if name doesn't have any dirs) */
299 if (lbasename (name) == name)
300 ALL_PSYMTABS (objfile, pst)
302 if (FILENAME_CMP (lbasename (pst->filename), name) == 0)
309 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
310 full method name, which consist of the class name (from T), the unadorned
311 method name from METHOD_ID, and the signature for the specific overload,
312 specified by SIGNATURE_ID. Note that this function is g++ specific. */
315 gdb_mangle_name (struct type *type, int method_id, int signature_id)
317 int mangled_name_len;
319 struct fn_field *f = TYPE_FN_FIELDLIST1 (type, method_id);
320 struct fn_field *method = &f[signature_id];
321 char *field_name = TYPE_FN_FIELDLIST_NAME (type, method_id);
322 char *physname = TYPE_FN_FIELD_PHYSNAME (f, signature_id);
323 char *newname = type_name_no_tag (type);
325 /* Does the form of physname indicate that it is the full mangled name
326 of a constructor (not just the args)? */
327 int is_full_physname_constructor;
330 int is_destructor = is_destructor_name (physname);
331 /* Need a new type prefix. */
332 char *const_prefix = method->is_const ? "C" : "";
333 char *volatile_prefix = method->is_volatile ? "V" : "";
335 int len = (newname == NULL ? 0 : strlen (newname));
337 /* Nothing to do if physname already contains a fully mangled v3 abi name
338 or an operator name. */
339 if ((physname[0] == '_' && physname[1] == 'Z')
340 || is_operator_name (field_name))
341 return xstrdup (physname);
343 is_full_physname_constructor = is_constructor_name (physname);
346 is_full_physname_constructor || (newname && strcmp (field_name, newname) == 0);
349 is_destructor = (strncmp (physname, "__dt", 4) == 0);
351 if (is_destructor || is_full_physname_constructor)
353 mangled_name = (char *) xmalloc (strlen (physname) + 1);
354 strcpy (mangled_name, physname);
360 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
362 else if (physname[0] == 't' || physname[0] == 'Q')
364 /* The physname for template and qualified methods already includes
366 sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
372 sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
374 mangled_name_len = ((is_constructor ? 0 : strlen (field_name))
375 + strlen (buf) + len + strlen (physname) + 1);
378 mangled_name = (char *) xmalloc (mangled_name_len);
380 mangled_name[0] = '\0';
382 strcpy (mangled_name, field_name);
384 strcat (mangled_name, buf);
385 /* If the class doesn't have a name, i.e. newname NULL, then we just
386 mangle it using 0 for the length of the class. Thus it gets mangled
387 as something starting with `::' rather than `classname::'. */
389 strcat (mangled_name, newname);
391 strcat (mangled_name, physname);
392 return (mangled_name);
396 /* Initialize the language dependent portion of a symbol
397 depending upon the language for the symbol. */
399 symbol_init_language_specific (struct general_symbol_info *gsymbol,
400 enum language language)
402 gsymbol->language = language;
403 if (gsymbol->language == language_cplus
404 || gsymbol->language == language_java
405 || gsymbol->language == language_objc)
407 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
411 memset (&gsymbol->language_specific, 0,
412 sizeof (gsymbol->language_specific));
416 /* Functions to initialize a symbol's mangled name. */
418 /* Create the hash table used for demangled names. Each hash entry is
419 a pair of strings; one for the mangled name and one for the demangled
420 name. The entry is hashed via just the mangled name. */
423 create_demangled_names_hash (struct objfile *objfile)
425 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
426 The hash table code will round this up to the next prime number.
427 Choosing a much larger table size wastes memory, and saves only about
428 1% in symbol reading. */
430 objfile->demangled_names_hash = htab_create_alloc_ex
431 (256, htab_hash_string, (int (*) (const void *, const void *)) streq,
432 NULL, objfile->md, xmcalloc, xmfree);
435 /* Try to determine the demangled name for a symbol, based on the
436 language of that symbol. If the language is set to language_auto,
437 it will attempt to find any demangling algorithm that works and
438 then set the language appropriately. The returned name is allocated
439 by the demangler and should be xfree'd. */
442 symbol_find_demangled_name (struct general_symbol_info *gsymbol,
445 char *demangled = NULL;
447 if (gsymbol->language == language_unknown)
448 gsymbol->language = language_auto;
450 if (gsymbol->language == language_objc
451 || gsymbol->language == language_auto)
454 objc_demangle (mangled, 0);
455 if (demangled != NULL)
457 gsymbol->language = language_objc;
461 if (gsymbol->language == language_cplus
462 || gsymbol->language == language_auto)
465 cplus_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
466 if (demangled != NULL)
468 gsymbol->language = language_cplus;
472 if (gsymbol->language == language_java)
475 cplus_demangle (mangled,
476 DMGL_PARAMS | DMGL_ANSI | DMGL_JAVA);
477 if (demangled != NULL)
479 gsymbol->language = language_java;
486 /* Set both the mangled and demangled (if any) names for GSYMBOL based
487 on LINKAGE_NAME and LEN. The hash table corresponding to OBJFILE
488 is used, and the memory comes from that objfile's objfile_obstack.
489 LINKAGE_NAME is copied, so the pointer can be discarded after
490 calling this function. */
492 /* We have to be careful when dealing with Java names: when we run
493 into a Java minimal symbol, we don't know it's a Java symbol, so it
494 gets demangled as a C++ name. This is unfortunate, but there's not
495 much we can do about it: but when demangling partial symbols and
496 regular symbols, we'd better not reuse the wrong demangled name.
497 (See PR gdb/1039.) We solve this by putting a distinctive prefix
498 on Java names when storing them in the hash table. */
500 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
501 don't mind the Java prefix so much: different languages have
502 different demangling requirements, so it's only natural that we
503 need to keep language data around in our demangling cache. But
504 it's not good that the minimal symbol has the wrong demangled name.
505 Unfortunately, I can't think of any easy solution to that
508 #define JAVA_PREFIX "##JAVA$$"
509 #define JAVA_PREFIX_LEN 8
512 symbol_set_names (struct general_symbol_info *gsymbol,
513 const char *linkage_name, int len, struct objfile *objfile)
516 /* A 0-terminated copy of the linkage name. */
517 const char *linkage_name_copy;
518 /* A copy of the linkage name that might have a special Java prefix
519 added to it, for use when looking names up in the hash table. */
520 const char *lookup_name;
521 /* The length of lookup_name. */
524 if (objfile->demangled_names_hash == NULL)
525 create_demangled_names_hash (objfile);
527 /* The stabs reader generally provides names that are not
528 NUL-terminated; most of the other readers don't do this, so we
529 can just use the given copy, unless we're in the Java case. */
530 if (gsymbol->language == language_java)
533 lookup_len = len + JAVA_PREFIX_LEN;
535 alloc_name = alloca (lookup_len + 1);
536 memcpy (alloc_name, JAVA_PREFIX, JAVA_PREFIX_LEN);
537 memcpy (alloc_name + JAVA_PREFIX_LEN, linkage_name, len);
538 alloc_name[lookup_len] = '\0';
540 lookup_name = alloc_name;
541 linkage_name_copy = alloc_name + JAVA_PREFIX_LEN;
543 else if (linkage_name[len] != '\0')
548 alloc_name = alloca (lookup_len + 1);
549 memcpy (alloc_name, linkage_name, len);
550 alloc_name[lookup_len] = '\0';
552 lookup_name = alloc_name;
553 linkage_name_copy = alloc_name;
558 lookup_name = linkage_name;
559 linkage_name_copy = linkage_name;
562 slot = (char **) htab_find_slot (objfile->demangled_names_hash,
563 lookup_name, INSERT);
565 /* If this name is not in the hash table, add it. */
568 char *demangled_name = symbol_find_demangled_name (gsymbol,
570 int demangled_len = demangled_name ? strlen (demangled_name) : 0;
572 /* If there is a demangled name, place it right after the mangled name.
573 Otherwise, just place a second zero byte after the end of the mangled
575 *slot = obstack_alloc (&objfile->objfile_obstack,
576 lookup_len + demangled_len + 2);
577 memcpy (*slot, lookup_name, lookup_len + 1);
578 if (demangled_name != NULL)
580 memcpy (*slot + lookup_len + 1, demangled_name, demangled_len + 1);
581 xfree (demangled_name);
584 (*slot)[lookup_len + 1] = '\0';
587 gsymbol->name = *slot + lookup_len - len;
588 if ((*slot)[lookup_len + 1] != '\0')
589 gsymbol->language_specific.cplus_specific.demangled_name
590 = &(*slot)[lookup_len + 1];
592 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
595 /* Initialize the demangled name of GSYMBOL if possible. Any required space
596 to store the name is obtained from the specified obstack. The function
597 symbol_set_names, above, should be used instead where possible for more
598 efficient memory usage. */
601 symbol_init_demangled_name (struct general_symbol_info *gsymbol,
602 struct obstack *obstack)
604 char *mangled = gsymbol->name;
605 char *demangled = NULL;
607 demangled = symbol_find_demangled_name (gsymbol, mangled);
608 if (gsymbol->language == language_cplus
609 || gsymbol->language == language_java
610 || gsymbol->language == language_objc)
614 gsymbol->language_specific.cplus_specific.demangled_name
615 = obsavestring (demangled, strlen (demangled), obstack);
619 gsymbol->language_specific.cplus_specific.demangled_name = NULL;
623 /* Unknown language; just clean up quietly. */
629 /* Return the source code name of a symbol. In languages where
630 demangling is necessary, this is the demangled name. */
633 symbol_natural_name (const struct general_symbol_info *gsymbol)
635 if ((gsymbol->language == language_cplus
636 || gsymbol->language == language_java
637 || gsymbol->language == language_objc)
638 && (gsymbol->language_specific.cplus_specific.demangled_name != NULL))
640 return gsymbol->language_specific.cplus_specific.demangled_name;
644 return gsymbol->name;
648 /* Return the demangled name for a symbol based on the language for
649 that symbol. If no demangled name exists, return NULL. */
651 symbol_demangled_name (struct general_symbol_info *gsymbol)
653 if (gsymbol->language == language_cplus
654 || gsymbol->language == language_java
655 || gsymbol->language == language_objc)
656 return gsymbol->language_specific.cplus_specific.demangled_name;
662 /* Return the search name of a symbol---generally the demangled or
663 linkage name of the symbol, depending on how it will be searched for.
664 If there is no distinct demangled name, then returns the same value
665 (same pointer) as SYMBOL_LINKAGE_NAME. */
666 char *symbol_search_name (const struct general_symbol_info *gsymbol) {
667 return symbol_natural_name (gsymbol);
670 /* Initialize the structure fields to zero values. */
672 init_sal (struct symtab_and_line *sal)
683 /* Find which partial symtab contains PC and SECTION. Return 0 if
684 none. We return the psymtab that contains a symbol whose address
685 exactly matches PC, or, if we cannot find an exact match, the
686 psymtab that contains a symbol whose address is closest to PC. */
687 struct partial_symtab *
688 find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
690 struct partial_symtab *pst;
691 struct objfile *objfile;
692 struct minimal_symbol *msymbol;
694 /* If we know that this is not a text address, return failure. This is
695 necessary because we loop based on texthigh and textlow, which do
696 not include the data ranges. */
697 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
699 && (msymbol->type == mst_data
700 || msymbol->type == mst_bss
701 || msymbol->type == mst_abs
702 || msymbol->type == mst_file_data
703 || msymbol->type == mst_file_bss))
706 ALL_PSYMTABS (objfile, pst)
708 if (pc >= pst->textlow && pc < pst->texthigh)
710 struct partial_symtab *tpst;
711 struct partial_symtab *best_pst = pst;
712 struct partial_symbol *best_psym = NULL;
714 /* An objfile that has its functions reordered might have
715 many partial symbol tables containing the PC, but
716 we want the partial symbol table that contains the
717 function containing the PC. */
718 if (!(objfile->flags & OBJF_REORDERED) &&
719 section == 0) /* can't validate section this way */
725 /* The code range of partial symtabs sometimes overlap, so, in
726 the loop below, we need to check all partial symtabs and
727 find the one that fits better for the given PC address. We
728 select the partial symtab that contains a symbol whose
729 address is closest to the PC address. By closest we mean
730 that find_pc_sect_symbol returns the symbol with address
731 that is closest and still less than the given PC. */
732 for (tpst = pst; tpst != NULL; tpst = tpst->next)
734 if (pc >= tpst->textlow && pc < tpst->texthigh)
736 struct partial_symbol *p;
738 p = find_pc_sect_psymbol (tpst, pc, section);
740 && SYMBOL_VALUE_ADDRESS (p)
741 == SYMBOL_VALUE_ADDRESS (msymbol))
745 /* We found a symbol in this partial symtab which
746 matches (or is closest to) PC, check whether it
747 is closer than our current BEST_PSYM. Since
748 this symbol address is necessarily lower or
749 equal to PC, the symbol closer to PC is the
750 symbol which address is the highest. */
751 /* This way we return the psymtab which contains
752 such best match symbol. This can help in cases
753 where the symbol information/debuginfo is not
754 complete, like for instance on IRIX6 with gcc,
755 where no debug info is emitted for
756 statics. (See also the nodebug.exp
758 if (best_psym == NULL
759 || SYMBOL_VALUE_ADDRESS (p)
760 > SYMBOL_VALUE_ADDRESS (best_psym))
775 /* Find which partial symtab contains PC. Return 0 if none.
776 Backward compatibility, no section */
778 struct partial_symtab *
779 find_pc_psymtab (CORE_ADDR pc)
781 return find_pc_sect_psymtab (pc, find_pc_mapped_section (pc));
784 /* Find which partial symbol within a psymtab matches PC and SECTION.
785 Return 0 if none. Check all psymtabs if PSYMTAB is 0. */
787 struct partial_symbol *
788 find_pc_sect_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc,
791 struct partial_symbol *best = NULL, *p, **pp;
795 psymtab = find_pc_sect_psymtab (pc, section);
799 /* Cope with programs that start at address 0 */
800 best_pc = (psymtab->textlow != 0) ? psymtab->textlow - 1 : 0;
802 /* Search the global symbols as well as the static symbols, so that
803 find_pc_partial_function doesn't use a minimal symbol and thus
804 cache a bad endaddr. */
805 for (pp = psymtab->objfile->global_psymbols.list + psymtab->globals_offset;
806 (pp - (psymtab->objfile->global_psymbols.list + psymtab->globals_offset)
807 < psymtab->n_global_syms);
811 if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
812 && SYMBOL_CLASS (p) == LOC_BLOCK
813 && pc >= SYMBOL_VALUE_ADDRESS (p)
814 && (SYMBOL_VALUE_ADDRESS (p) > best_pc
815 || (psymtab->textlow == 0
816 && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
818 if (section) /* match on a specific section */
820 fixup_psymbol_section (p, psymtab->objfile);
821 if (SYMBOL_BFD_SECTION (p) != section)
824 best_pc = SYMBOL_VALUE_ADDRESS (p);
829 for (pp = psymtab->objfile->static_psymbols.list + psymtab->statics_offset;
830 (pp - (psymtab->objfile->static_psymbols.list + psymtab->statics_offset)
831 < psymtab->n_static_syms);
835 if (SYMBOL_DOMAIN (p) == VAR_DOMAIN
836 && SYMBOL_CLASS (p) == LOC_BLOCK
837 && pc >= SYMBOL_VALUE_ADDRESS (p)
838 && (SYMBOL_VALUE_ADDRESS (p) > best_pc
839 || (psymtab->textlow == 0
840 && best_pc == 0 && SYMBOL_VALUE_ADDRESS (p) == 0)))
842 if (section) /* match on a specific section */
844 fixup_psymbol_section (p, psymtab->objfile);
845 if (SYMBOL_BFD_SECTION (p) != section)
848 best_pc = SYMBOL_VALUE_ADDRESS (p);
856 /* Find which partial symbol within a psymtab matches PC. Return 0 if none.
857 Check all psymtabs if PSYMTAB is 0. Backwards compatibility, no section. */
859 struct partial_symbol *
860 find_pc_psymbol (struct partial_symtab *psymtab, CORE_ADDR pc)
862 return find_pc_sect_psymbol (psymtab, pc, find_pc_mapped_section (pc));
865 /* Debug symbols usually don't have section information. We need to dig that
866 out of the minimal symbols and stash that in the debug symbol. */
869 fixup_section (struct general_symbol_info *ginfo, struct objfile *objfile)
871 struct minimal_symbol *msym;
872 msym = lookup_minimal_symbol (ginfo->name, NULL, objfile);
876 ginfo->bfd_section = SYMBOL_BFD_SECTION (msym);
877 ginfo->section = SYMBOL_SECTION (msym);
881 /* Static, function-local variables do appear in the linker
882 (minimal) symbols, but are frequently given names that won't
883 be found via lookup_minimal_symbol(). E.g., it has been
884 observed in frv-uclinux (ELF) executables that a static,
885 function-local variable named "foo" might appear in the
886 linker symbols as "foo.6" or "foo.3". Thus, there is no
887 point in attempting to extend the lookup-by-name mechanism to
888 handle this case due to the fact that there can be multiple
891 So, instead, search the section table when lookup by name has
892 failed. The ``addr'' and ``endaddr'' fields may have already
893 been relocated. If so, the relocation offset (i.e. the
894 ANOFFSET value) needs to be subtracted from these values when
895 performing the comparison. We unconditionally subtract it,
896 because, when no relocation has been performed, the ANOFFSET
897 value will simply be zero.
899 The address of the symbol whose section we're fixing up HAS
900 NOT BEEN adjusted (relocated) yet. It can't have been since
901 the section isn't yet known and knowing the section is
902 necessary in order to add the correct relocation value. In
903 other words, we wouldn't even be in this function (attempting
904 to compute the section) if it were already known.
906 Note that it is possible to search the minimal symbols
907 (subtracting the relocation value if necessary) to find the
908 matching minimal symbol, but this is overkill and much less
909 efficient. It is not necessary to find the matching minimal
910 symbol, only its section.
912 Note that this technique (of doing a section table search)
913 can fail when unrelocated section addresses overlap. For
914 this reason, we still attempt a lookup by name prior to doing
915 a search of the section table. */
918 struct obj_section *s;
920 addr = ginfo->value.address;
922 ALL_OBJFILE_OSECTIONS (objfile, s)
924 int idx = s->the_bfd_section->index;
925 CORE_ADDR offset = ANOFFSET (objfile->section_offsets, idx);
927 if (s->addr - offset <= addr && addr < s->endaddr - offset)
929 ginfo->bfd_section = s->the_bfd_section;
930 ginfo->section = idx;
938 fixup_symbol_section (struct symbol *sym, struct objfile *objfile)
943 if (SYMBOL_BFD_SECTION (sym))
946 fixup_section (&sym->ginfo, objfile);
951 struct partial_symbol *
952 fixup_psymbol_section (struct partial_symbol *psym, struct objfile *objfile)
957 if (SYMBOL_BFD_SECTION (psym))
960 fixup_section (&psym->ginfo, objfile);
965 /* Find the definition for a specified symbol name NAME
966 in domain DOMAIN, visible from lexical block BLOCK.
967 Returns the struct symbol pointer, or zero if no symbol is found.
968 If SYMTAB is non-NULL, store the symbol table in which the
969 symbol was found there, or NULL if not found.
970 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
971 NAME is a field of the current implied argument `this'. If so set
972 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
973 BLOCK_FOUND is set to the block in which NAME is found (in the case of
974 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
976 /* This function has a bunch of loops in it and it would seem to be
977 attractive to put in some QUIT's (though I'm not really sure
978 whether it can run long enough to be really important). But there
979 are a few calls for which it would appear to be bad news to quit
980 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
981 that there is C++ code below which can error(), but that probably
982 doesn't affect these calls since they are looking for a known
983 variable and thus can probably assume it will never hit the C++
987 lookup_symbol (const char *name, const struct block *block,
988 const domain_enum domain, int *is_a_field_of_this,
989 struct symtab **symtab)
991 char *demangled_name = NULL;
992 const char *modified_name = NULL;
993 const char *mangled_name = NULL;
994 int needtofreename = 0;
995 struct symbol *returnval;
997 modified_name = name;
999 /* If we are using C++ language, demangle the name before doing a lookup, so
1000 we can always binary search. */
1001 if (current_language->la_language == language_cplus)
1003 demangled_name = cplus_demangle (name, DMGL_ANSI | DMGL_PARAMS);
1006 mangled_name = name;
1007 modified_name = demangled_name;
1012 if (case_sensitivity == case_sensitive_off)
1017 len = strlen (name);
1018 copy = (char *) alloca (len + 1);
1019 for (i= 0; i < len; i++)
1020 copy[i] = tolower (name[i]);
1022 modified_name = copy;
1025 returnval = lookup_symbol_aux (modified_name, mangled_name, block,
1026 domain, is_a_field_of_this, symtab);
1028 xfree (demangled_name);
1033 /* Behave like lookup_symbol_aux except that NAME is the natural name
1034 of the symbol that we're looking for and, if LINKAGE_NAME is
1035 non-NULL, ensure that the symbol's linkage name matches as
1038 static struct symbol *
1039 lookup_symbol_aux (const char *name, const char *linkage_name,
1040 const struct block *block, const domain_enum domain,
1041 int *is_a_field_of_this, struct symtab **symtab)
1045 /* Make sure we do something sensible with is_a_field_of_this, since
1046 the callers that set this parameter to some non-null value will
1047 certainly use it later and expect it to be either 0 or 1.
1048 If we don't set it, the contents of is_a_field_of_this are
1050 if (is_a_field_of_this != NULL)
1051 *is_a_field_of_this = 0;
1053 /* Search specified block and its superiors. Don't search
1054 STATIC_BLOCK or GLOBAL_BLOCK. */
1056 sym = lookup_symbol_aux_local (name, linkage_name, block, domain,
1061 /* If requested to do so by the caller and if appropriate for the
1062 current language, check to see if NAME is a field of `this'. */
1064 if (current_language->la_value_of_this != NULL
1065 && is_a_field_of_this != NULL)
1067 struct value *v = current_language->la_value_of_this (0);
1069 if (v && check_field (v, name))
1071 *is_a_field_of_this = 1;
1078 /* Now do whatever is appropriate for the current language to look
1079 up static and global variables. */
1081 sym = current_language->la_lookup_symbol_nonlocal (name, linkage_name,
1087 /* Now search all static file-level symbols. Not strictly correct,
1088 but more useful than an error. Do the symtabs first, then check
1089 the psymtabs. If a psymtab indicates the existence of the
1090 desired name as a file-level static, then do psymtab-to-symtab
1091 conversion on the fly and return the found symbol. */
1093 sym = lookup_symbol_aux_symtabs (STATIC_BLOCK, name, linkage_name,
1098 sym = lookup_symbol_aux_psymtabs (STATIC_BLOCK, name, linkage_name,
1108 /* Check to see if the symbol is defined in BLOCK or its superiors.
1109 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1111 static struct symbol *
1112 lookup_symbol_aux_local (const char *name, const char *linkage_name,
1113 const struct block *block,
1114 const domain_enum domain,
1115 struct symtab **symtab)
1118 const struct block *static_block = block_static_block (block);
1120 /* Check if either no block is specified or it's a global block. */
1122 if (static_block == NULL)
1125 while (block != static_block)
1127 sym = lookup_symbol_aux_block (name, linkage_name, block, domain,
1131 block = BLOCK_SUPERBLOCK (block);
1134 /* We've reached the static block without finding a result. */
1139 /* Look up a symbol in a block; if found, locate its symtab, fixup the
1140 symbol, and set block_found appropriately. */
1143 lookup_symbol_aux_block (const char *name, const char *linkage_name,
1144 const struct block *block,
1145 const domain_enum domain,
1146 struct symtab **symtab)
1149 struct objfile *objfile = NULL;
1150 struct blockvector *bv;
1152 struct symtab *s = NULL;
1154 sym = lookup_block_symbol (block, name, linkage_name, domain);
1157 block_found = block;
1160 /* Search the list of symtabs for one which contains the
1161 address of the start of this block. */
1162 ALL_SYMTABS (objfile, s)
1164 bv = BLOCKVECTOR (s);
1165 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1166 if (BLOCK_START (b) <= BLOCK_START (block)
1167 && BLOCK_END (b) > BLOCK_START (block))
1174 return fixup_symbol_section (sym, objfile);
1180 /* Check to see if the symbol is defined in one of the symtabs.
1181 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1182 depending on whether or not we want to search global symbols or
1185 static struct symbol *
1186 lookup_symbol_aux_symtabs (int block_index,
1187 const char *name, const char *linkage_name,
1188 const domain_enum domain,
1189 struct symtab **symtab)
1192 struct objfile *objfile;
1193 struct blockvector *bv;
1194 const struct block *block;
1197 ALL_SYMTABS (objfile, s)
1199 bv = BLOCKVECTOR (s);
1200 block = BLOCKVECTOR_BLOCK (bv, block_index);
1201 sym = lookup_block_symbol (block, name, linkage_name, domain);
1204 block_found = block;
1207 return fixup_symbol_section (sym, objfile);
1214 /* Check to see if the symbol is defined in one of the partial
1215 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or
1216 STATIC_BLOCK, depending on whether or not we want to search global
1217 symbols or static symbols. */
1219 static struct symbol *
1220 lookup_symbol_aux_psymtabs (int block_index, const char *name,
1221 const char *linkage_name,
1222 const domain_enum domain,
1223 struct symtab **symtab)
1226 struct objfile *objfile;
1227 struct blockvector *bv;
1228 const struct block *block;
1229 struct partial_symtab *ps;
1231 const int psymtab_index = (block_index == GLOBAL_BLOCK ? 1 : 0);
1233 ALL_PSYMTABS (objfile, ps)
1236 && lookup_partial_symbol (ps, name, linkage_name,
1237 psymtab_index, domain))
1239 s = PSYMTAB_TO_SYMTAB (ps);
1240 bv = BLOCKVECTOR (s);
1241 block = BLOCKVECTOR_BLOCK (bv, block_index);
1242 sym = lookup_block_symbol (block, name, linkage_name, domain);
1245 /* This shouldn't be necessary, but as a last resort try
1246 looking in the statics even though the psymtab claimed
1247 the symbol was global, or vice-versa. It's possible
1248 that the psymtab gets it wrong in some cases. */
1250 /* FIXME: carlton/2002-09-30: Should we really do that?
1251 If that happens, isn't it likely to be a GDB error, in
1252 which case we should fix the GDB error rather than
1253 silently dealing with it here? So I'd vote for
1254 removing the check for the symbol in the other
1256 block = BLOCKVECTOR_BLOCK (bv,
1257 block_index == GLOBAL_BLOCK ?
1258 STATIC_BLOCK : GLOBAL_BLOCK);
1259 sym = lookup_block_symbol (block, name, linkage_name, domain);
1261 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>).",
1262 block_index == GLOBAL_BLOCK ? "global" : "static",
1263 name, ps->filename, name, name);
1267 return fixup_symbol_section (sym, objfile);
1275 /* Check for the possibility of the symbol being a function or a
1276 mangled variable that is stored in one of the minimal symbol
1277 tables. Eventually, all global symbols might be resolved in this
1280 /* NOTE: carlton/2002-12-05: At one point, this function was part of
1281 lookup_symbol_aux, and what are now 'return' statements within
1282 lookup_symbol_aux_minsyms returned from lookup_symbol_aux, even if
1283 sym was NULL. As far as I can tell, this was basically accidental;
1284 it didn't happen every time that msymbol was non-NULL, but only if
1285 some additional conditions held as well, and it caused problems
1286 with HP-generated symbol tables. */
1288 /* NOTE: carlton/2003-05-14: This function was once used as part of
1289 lookup_symbol. It is currently unnecessary for correctness
1290 reasons, however, and using it doesn't seem to be any faster than
1291 using lookup_symbol_aux_psymtabs, so I'm commenting it out. */
1293 static struct symbol *
1294 lookup_symbol_aux_minsyms (const char *name,
1295 const char *linkage_name,
1296 const domain_enum domain,
1297 int *is_a_field_of_this,
1298 struct symtab **symtab)
1301 struct blockvector *bv;
1302 const struct block *block;
1303 struct minimal_symbol *msymbol;
1306 if (domain == VAR_DOMAIN)
1308 msymbol = lookup_minimal_symbol (name, NULL, NULL);
1310 if (msymbol != NULL)
1312 /* OK, we found a minimal symbol in spite of not finding any
1313 symbol. There are various possible explanations for
1314 this. One possibility is the symbol exists in code not
1315 compiled -g. Another possibility is that the 'psymtab'
1316 isn't doing its job. A third possibility, related to #2,
1317 is that we were confused by name-mangling. For instance,
1318 maybe the psymtab isn't doing its job because it only
1319 know about demangled names, but we were given a mangled
1322 /* We first use the address in the msymbol to try to locate
1323 the appropriate symtab. Note that find_pc_sect_symtab()
1324 has a side-effect of doing psymtab-to-symtab expansion,
1325 for the found symtab. */
1326 s = find_pc_sect_symtab (SYMBOL_VALUE_ADDRESS (msymbol),
1327 SYMBOL_BFD_SECTION (msymbol));
1330 /* This is a function which has a symtab for its address. */
1331 bv = BLOCKVECTOR (s);
1332 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1334 /* This call used to pass `SYMBOL_LINKAGE_NAME (msymbol)' as the
1335 `name' argument to lookup_block_symbol. But the name
1336 of a minimal symbol is always mangled, so that seems
1337 to be clearly the wrong thing to pass as the
1340 lookup_block_symbol (block, name, linkage_name, domain);
1341 /* We kept static functions in minimal symbol table as well as
1342 in static scope. We want to find them in the symbol table. */
1345 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1346 sym = lookup_block_symbol (block, name,
1347 linkage_name, domain);
1350 /* NOTE: carlton/2002-12-04: The following comment was
1351 taken from a time when two versions of this function
1352 were part of the body of lookup_symbol_aux: this
1353 comment was taken from the version of the function
1354 that was #ifdef HPUXHPPA, and the comment was right
1355 before the 'return NULL' part of lookup_symbol_aux.
1356 (Hence the "Fall through and return 0" comment.)
1357 Elena did some digging into the situation for
1358 Fortran, and she reports:
1360 "I asked around (thanks to Jeff Knaggs), and I think
1361 the story for Fortran goes like this:
1363 "Apparently, in older Fortrans, '_' was not part of
1364 the user namespace. g77 attached a final '_' to
1365 procedure names as the exported symbols for linkage
1366 (foo_) , but the symbols went in the debug info just
1367 like 'foo'. The rationale behind this is not
1368 completely clear, and maybe it was done to other
1369 symbols as well, not just procedures." */
1371 /* If we get here with sym == 0, the symbol was
1372 found in the minimal symbol table
1373 but not in the symtab.
1374 Fall through and return 0 to use the msymbol
1375 definition of "foo_".
1376 (Note that outer code generally follows up a call
1377 to this routine with a call to lookup_minimal_symbol(),
1378 so a 0 return means we'll just flow into that other routine).
1380 This happens for Fortran "foo_" symbols,
1381 which are "foo" in the symtab.
1383 This can also happen if "asm" is used to make a
1384 regular symbol but not a debugging symbol, e.g.
1385 asm(".globl _main");
1389 if (symtab != NULL && sym != NULL)
1391 return fixup_symbol_section (sym, s->objfile);
1400 /* A default version of lookup_symbol_nonlocal for use by languages
1401 that can't think of anything better to do. This implements the C
1405 basic_lookup_symbol_nonlocal (const char *name,
1406 const char *linkage_name,
1407 const struct block *block,
1408 const domain_enum domain,
1409 struct symtab **symtab)
1413 /* NOTE: carlton/2003-05-19: The comments below were written when
1414 this (or what turned into this) was part of lookup_symbol_aux;
1415 I'm much less worried about these questions now, since these
1416 decisions have turned out well, but I leave these comments here
1419 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1420 not it would be appropriate to search the current global block
1421 here as well. (That's what this code used to do before the
1422 is_a_field_of_this check was moved up.) On the one hand, it's
1423 redundant with the lookup_symbol_aux_symtabs search that happens
1424 next. On the other hand, if decode_line_1 is passed an argument
1425 like filename:var, then the user presumably wants 'var' to be
1426 searched for in filename. On the third hand, there shouldn't be
1427 multiple global variables all of which are named 'var', and it's
1428 not like decode_line_1 has ever restricted its search to only
1429 global variables in a single filename. All in all, only
1430 searching the static block here seems best: it's correct and it's
1433 /* NOTE: carlton/2002-12-05: There's also a possible performance
1434 issue here: if you usually search for global symbols in the
1435 current file, then it would be slightly better to search the
1436 current global block before searching all the symtabs. But there
1437 are other factors that have a much greater effect on performance
1438 than that one, so I don't think we should worry about that for
1441 sym = lookup_symbol_static (name, linkage_name, block, domain, symtab);
1445 return lookup_symbol_global (name, linkage_name, domain, symtab);
1448 /* Lookup a symbol in the static block associated to BLOCK, if there
1449 is one; do nothing if BLOCK is NULL or a global block. */
1452 lookup_symbol_static (const char *name,
1453 const char *linkage_name,
1454 const struct block *block,
1455 const domain_enum domain,
1456 struct symtab **symtab)
1458 const struct block *static_block = block_static_block (block);
1460 if (static_block != NULL)
1461 return lookup_symbol_aux_block (name, linkage_name, static_block,
1467 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1471 lookup_symbol_global (const char *name,
1472 const char *linkage_name,
1473 const domain_enum domain,
1474 struct symtab **symtab)
1478 sym = lookup_symbol_aux_symtabs (GLOBAL_BLOCK, name, linkage_name,
1483 return lookup_symbol_aux_psymtabs (GLOBAL_BLOCK, name, linkage_name,
1487 /* Look, in partial_symtab PST, for symbol whose natural name is NAME.
1488 If LINKAGE_NAME is non-NULL, check in addition that the symbol's
1489 linkage name matches it. Check the global symbols if GLOBAL, the
1490 static symbols if not */
1492 struct partial_symbol *
1493 lookup_partial_symbol (struct partial_symtab *pst, const char *name,
1494 const char *linkage_name, int global,
1497 struct partial_symbol *temp;
1498 struct partial_symbol **start, **psym;
1499 struct partial_symbol **top, **real_top, **bottom, **center;
1500 int length = (global ? pst->n_global_syms : pst->n_static_syms);
1501 int do_linear_search = 1;
1508 pst->objfile->global_psymbols.list + pst->globals_offset :
1509 pst->objfile->static_psymbols.list + pst->statics_offset);
1511 if (global) /* This means we can use a binary search. */
1513 do_linear_search = 0;
1515 /* Binary search. This search is guaranteed to end with center
1516 pointing at the earliest partial symbol whose name might be
1517 correct. At that point *all* partial symbols with an
1518 appropriate name will be checked against the correct
1522 top = start + length - 1;
1524 while (top > bottom)
1526 center = bottom + (top - bottom) / 2;
1527 if (!(center < top))
1528 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1529 if (!do_linear_search
1530 && (SYMBOL_LANGUAGE (*center) == language_java))
1532 do_linear_search = 1;
1534 if (strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*center), name) >= 0)
1540 bottom = center + 1;
1543 if (!(top == bottom))
1544 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1546 while (top <= real_top
1547 && (linkage_name != NULL
1548 ? strcmp (SYMBOL_LINKAGE_NAME (*top), linkage_name) == 0
1549 : SYMBOL_MATCHES_SEARCH_NAME (*top,name)))
1551 if (SYMBOL_DOMAIN (*top) == domain)
1559 /* Can't use a binary search or else we found during the binary search that
1560 we should also do a linear search. */
1562 if (do_linear_search)
1564 for (psym = start; psym < start + length; psym++)
1566 if (domain == SYMBOL_DOMAIN (*psym))
1568 if (linkage_name != NULL
1569 ? strcmp (SYMBOL_LINKAGE_NAME (*psym), linkage_name) == 0
1570 : SYMBOL_MATCHES_SEARCH_NAME (*psym, name))
1581 /* Look up a type named NAME in the struct_domain. The type returned
1582 must not be opaque -- i.e., must have at least one field
1586 lookup_transparent_type (const char *name)
1588 return current_language->la_lookup_transparent_type (name);
1591 /* The standard implementation of lookup_transparent_type. This code
1592 was modeled on lookup_symbol -- the parts not relevant to looking
1593 up types were just left out. In particular it's assumed here that
1594 types are available in struct_domain and only at file-static or
1598 basic_lookup_transparent_type (const char *name)
1601 struct symtab *s = NULL;
1602 struct partial_symtab *ps;
1603 struct blockvector *bv;
1604 struct objfile *objfile;
1605 struct block *block;
1607 /* Now search all the global symbols. Do the symtab's first, then
1608 check the psymtab's. If a psymtab indicates the existence
1609 of the desired name as a global, then do psymtab-to-symtab
1610 conversion on the fly and return the found symbol. */
1612 ALL_SYMTABS (objfile, s)
1614 bv = BLOCKVECTOR (s);
1615 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1616 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1617 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1619 return SYMBOL_TYPE (sym);
1623 ALL_PSYMTABS (objfile, ps)
1625 if (!ps->readin && lookup_partial_symbol (ps, name, NULL,
1628 s = PSYMTAB_TO_SYMTAB (ps);
1629 bv = BLOCKVECTOR (s);
1630 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1631 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1634 /* This shouldn't be necessary, but as a last resort
1635 * try looking in the statics even though the psymtab
1636 * claimed the symbol was global. It's possible that
1637 * the psymtab gets it wrong in some cases.
1639 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1640 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1642 error ("Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1643 %s may be an inlined function, or may be a template function\n\
1644 (if a template, try specifying an instantiation: %s<type>).",
1645 name, ps->filename, name, name);
1647 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1648 return SYMBOL_TYPE (sym);
1652 /* Now search the static file-level symbols.
1653 Not strictly correct, but more useful than an error.
1654 Do the symtab's first, then
1655 check the psymtab's. If a psymtab indicates the existence
1656 of the desired name as a file-level static, then do psymtab-to-symtab
1657 conversion on the fly and return the found symbol.
1660 ALL_SYMTABS (objfile, s)
1662 bv = BLOCKVECTOR (s);
1663 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1664 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1665 if (sym && !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1667 return SYMBOL_TYPE (sym);
1671 ALL_PSYMTABS (objfile, ps)
1673 if (!ps->readin && lookup_partial_symbol (ps, name, NULL, 0, STRUCT_DOMAIN))
1675 s = PSYMTAB_TO_SYMTAB (ps);
1676 bv = BLOCKVECTOR (s);
1677 block = BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
1678 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1681 /* This shouldn't be necessary, but as a last resort
1682 * try looking in the globals even though the psymtab
1683 * claimed the symbol was static. It's possible that
1684 * the psymtab gets it wrong in some cases.
1686 block = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1687 sym = lookup_block_symbol (block, name, NULL, STRUCT_DOMAIN);
1689 error ("Internal: static symbol `%s' found in %s psymtab but not in symtab.\n\
1690 %s may be an inlined function, or may be a template function\n\
1691 (if a template, try specifying an instantiation: %s<type>).",
1692 name, ps->filename, name, name);
1694 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym)))
1695 return SYMBOL_TYPE (sym);
1698 return (struct type *) 0;
1702 /* Find the psymtab containing main(). */
1703 /* FIXME: What about languages without main() or specially linked
1704 executables that have no main() ? */
1706 struct partial_symtab *
1707 find_main_psymtab (void)
1709 struct partial_symtab *pst;
1710 struct objfile *objfile;
1712 ALL_PSYMTABS (objfile, pst)
1714 if (lookup_partial_symbol (pst, main_name (), NULL, 1, VAR_DOMAIN))
1722 /* Search BLOCK for symbol NAME in DOMAIN.
1724 Note that if NAME is the demangled form of a C++ symbol, we will fail
1725 to find a match during the binary search of the non-encoded names, but
1726 for now we don't worry about the slight inefficiency of looking for
1727 a match we'll never find, since it will go pretty quick. Once the
1728 binary search terminates, we drop through and do a straight linear
1729 search on the symbols. Each symbol which is marked as being a ObjC/C++
1730 symbol (language_cplus or language_objc set) has both the encoded and
1731 non-encoded names tested for a match.
1733 If LINKAGE_NAME is non-NULL, verify that any symbol we find has this
1734 particular mangled name.
1738 lookup_block_symbol (const struct block *block, const char *name,
1739 const char *linkage_name,
1740 const domain_enum domain)
1742 struct dict_iterator iter;
1745 if (!BLOCK_FUNCTION (block))
1747 for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter);
1749 sym = dict_iter_name_next (name, &iter))
1751 if (SYMBOL_DOMAIN (sym) == domain
1752 && (linkage_name != NULL
1753 ? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1))
1760 /* Note that parameter symbols do not always show up last in the
1761 list; this loop makes sure to take anything else other than
1762 parameter symbols first; it only uses parameter symbols as a
1763 last resort. Note that this only takes up extra computation
1766 struct symbol *sym_found = NULL;
1768 for (sym = dict_iter_name_first (BLOCK_DICT (block), name, &iter);
1770 sym = dict_iter_name_next (name, &iter))
1772 if (SYMBOL_DOMAIN (sym) == domain
1773 && (linkage_name != NULL
1774 ? strcmp (SYMBOL_LINKAGE_NAME (sym), linkage_name) == 0 : 1))
1777 if (SYMBOL_CLASS (sym) != LOC_ARG &&
1778 SYMBOL_CLASS (sym) != LOC_LOCAL_ARG &&
1779 SYMBOL_CLASS (sym) != LOC_REF_ARG &&
1780 SYMBOL_CLASS (sym) != LOC_REGPARM &&
1781 SYMBOL_CLASS (sym) != LOC_REGPARM_ADDR &&
1782 SYMBOL_CLASS (sym) != LOC_BASEREG_ARG &&
1783 SYMBOL_CLASS (sym) != LOC_COMPUTED_ARG)
1789 return (sym_found); /* Will be NULL if not found. */
1793 /* Find the symtab associated with PC and SECTION. Look through the
1794 psymtabs and read in another symtab if necessary. */
1797 find_pc_sect_symtab (CORE_ADDR pc, asection *section)
1800 struct blockvector *bv;
1801 struct symtab *s = NULL;
1802 struct symtab *best_s = NULL;
1803 struct partial_symtab *ps;
1804 struct objfile *objfile;
1805 CORE_ADDR distance = 0;
1806 struct minimal_symbol *msymbol;
1808 /* If we know that this is not a text address, return failure. This is
1809 necessary because we loop based on the block's high and low code
1810 addresses, which do not include the data ranges, and because
1811 we call find_pc_sect_psymtab which has a similar restriction based
1812 on the partial_symtab's texthigh and textlow. */
1813 msymbol = lookup_minimal_symbol_by_pc_section (pc, section);
1815 && (msymbol->type == mst_data
1816 || msymbol->type == mst_bss
1817 || msymbol->type == mst_abs
1818 || msymbol->type == mst_file_data
1819 || msymbol->type == mst_file_bss))
1822 /* Search all symtabs for the one whose file contains our address, and which
1823 is the smallest of all the ones containing the address. This is designed
1824 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1825 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1826 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1828 This happens for native ecoff format, where code from included files
1829 gets its own symtab. The symtab for the included file should have
1830 been read in already via the dependency mechanism.
1831 It might be swifter to create several symtabs with the same name
1832 like xcoff does (I'm not sure).
1834 It also happens for objfiles that have their functions reordered.
1835 For these, the symtab we are looking for is not necessarily read in. */
1837 ALL_SYMTABS (objfile, s)
1839 bv = BLOCKVECTOR (s);
1840 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
1842 if (BLOCK_START (b) <= pc
1843 && BLOCK_END (b) > pc
1845 || BLOCK_END (b) - BLOCK_START (b) < distance))
1847 /* For an objfile that has its functions reordered,
1848 find_pc_psymtab will find the proper partial symbol table
1849 and we simply return its corresponding symtab. */
1850 /* In order to better support objfiles that contain both
1851 stabs and coff debugging info, we continue on if a psymtab
1853 if ((objfile->flags & OBJF_REORDERED) && objfile->psymtabs)
1855 ps = find_pc_sect_psymtab (pc, section);
1857 return PSYMTAB_TO_SYMTAB (ps);
1861 struct dict_iterator iter;
1862 struct symbol *sym = NULL;
1864 ALL_BLOCK_SYMBOLS (b, iter, sym)
1866 fixup_symbol_section (sym, objfile);
1867 if (section == SYMBOL_BFD_SECTION (sym))
1871 continue; /* no symbol in this symtab matches section */
1873 distance = BLOCK_END (b) - BLOCK_START (b);
1882 ps = find_pc_sect_psymtab (pc, section);
1886 /* Might want to error() here (in case symtab is corrupt and
1887 will cause a core dump), but maybe we can successfully
1888 continue, so let's not. */
1890 (Internal error: pc 0x%s in read in psymtab, but not in symtab.)\n",
1892 s = PSYMTAB_TO_SYMTAB (ps);
1897 /* Find the symtab associated with PC. Look through the psymtabs and
1898 read in another symtab if necessary. Backward compatibility, no section */
1901 find_pc_symtab (CORE_ADDR pc)
1903 return find_pc_sect_symtab (pc, find_pc_mapped_section (pc));
1907 /* Find the source file and line number for a given PC value and SECTION.
1908 Return a structure containing a symtab pointer, a line number,
1909 and a pc range for the entire source line.
1910 The value's .pc field is NOT the specified pc.
1911 NOTCURRENT nonzero means, if specified pc is on a line boundary,
1912 use the line that ends there. Otherwise, in that case, the line
1913 that begins there is used. */
1915 /* The big complication here is that a line may start in one file, and end just
1916 before the start of another file. This usually occurs when you #include
1917 code in the middle of a subroutine. To properly find the end of a line's PC
1918 range, we must search all symtabs associated with this compilation unit, and
1919 find the one whose first PC is closer than that of the next line in this
1922 /* If it's worth the effort, we could be using a binary search. */
1924 struct symtab_and_line
1925 find_pc_sect_line (CORE_ADDR pc, struct bfd_section *section, int notcurrent)
1928 struct linetable *l;
1931 struct linetable_entry *item;
1932 struct symtab_and_line val;
1933 struct blockvector *bv;
1934 struct minimal_symbol *msymbol;
1935 struct minimal_symbol *mfunsym;
1937 /* Info on best line seen so far, and where it starts, and its file. */
1939 struct linetable_entry *best = NULL;
1940 CORE_ADDR best_end = 0;
1941 struct symtab *best_symtab = 0;
1943 /* Store here the first line number
1944 of a file which contains the line at the smallest pc after PC.
1945 If we don't find a line whose range contains PC,
1946 we will use a line one less than this,
1947 with a range from the start of that file to the first line's pc. */
1948 struct linetable_entry *alt = NULL;
1949 struct symtab *alt_symtab = 0;
1951 /* Info on best line seen in this file. */
1953 struct linetable_entry *prev;
1955 /* If this pc is not from the current frame,
1956 it is the address of the end of a call instruction.
1957 Quite likely that is the start of the following statement.
1958 But what we want is the statement containing the instruction.
1959 Fudge the pc to make sure we get that. */
1961 init_sal (&val); /* initialize to zeroes */
1963 /* It's tempting to assume that, if we can't find debugging info for
1964 any function enclosing PC, that we shouldn't search for line
1965 number info, either. However, GAS can emit line number info for
1966 assembly files --- very helpful when debugging hand-written
1967 assembly code. In such a case, we'd have no debug info for the
1968 function, but we would have line info. */
1973 /* elz: added this because this function returned the wrong
1974 information if the pc belongs to a stub (import/export)
1975 to call a shlib function. This stub would be anywhere between
1976 two functions in the target, and the line info was erroneously
1977 taken to be the one of the line before the pc.
1979 /* RT: Further explanation:
1981 * We have stubs (trampolines) inserted between procedures.
1983 * Example: "shr1" exists in a shared library, and a "shr1" stub also
1984 * exists in the main image.
1986 * In the minimal symbol table, we have a bunch of symbols
1987 * sorted by start address. The stubs are marked as "trampoline",
1988 * the others appear as text. E.g.:
1990 * Minimal symbol table for main image
1991 * main: code for main (text symbol)
1992 * shr1: stub (trampoline symbol)
1993 * foo: code for foo (text symbol)
1995 * Minimal symbol table for "shr1" image:
1997 * shr1: code for shr1 (text symbol)
2000 * So the code below is trying to detect if we are in the stub
2001 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2002 * and if found, do the symbolization from the real-code address
2003 * rather than the stub address.
2005 * Assumptions being made about the minimal symbol table:
2006 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2007 * if we're really in the trampoline. If we're beyond it (say
2008 * we're in "foo" in the above example), it'll have a closer
2009 * symbol (the "foo" text symbol for example) and will not
2010 * return the trampoline.
2011 * 2. lookup_minimal_symbol_text() will find a real text symbol
2012 * corresponding to the trampoline, and whose address will
2013 * be different than the trampoline address. I put in a sanity
2014 * check for the address being the same, to avoid an
2015 * infinite recursion.
2017 msymbol = lookup_minimal_symbol_by_pc (pc);
2018 if (msymbol != NULL)
2019 if (MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
2021 mfunsym = lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol),
2023 if (mfunsym == NULL)
2024 /* I eliminated this warning since it is coming out
2025 * in the following situation:
2026 * gdb shmain // test program with shared libraries
2027 * (gdb) break shr1 // function in shared lib
2028 * Warning: In stub for ...
2029 * In the above situation, the shared lib is not loaded yet,
2030 * so of course we can't find the real func/line info,
2031 * but the "break" still works, and the warning is annoying.
2032 * So I commented out the warning. RT */
2033 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2035 else if (SYMBOL_VALUE (mfunsym) == SYMBOL_VALUE (msymbol))
2036 /* Avoid infinite recursion */
2037 /* See above comment about why warning is commented out */
2038 /* warning ("In stub for %s; unable to find real function/line info", SYMBOL_LINKAGE_NAME (msymbol)) */ ;
2041 return find_pc_line (SYMBOL_VALUE (mfunsym), 0);
2045 s = find_pc_sect_symtab (pc, section);
2048 /* if no symbol information, return previous pc */
2055 bv = BLOCKVECTOR (s);
2057 /* Look at all the symtabs that share this blockvector.
2058 They all have the same apriori range, that we found was right;
2059 but they have different line tables. */
2061 for (; s && BLOCKVECTOR (s) == bv; s = s->next)
2063 /* Find the best line in this symtab. */
2070 /* I think len can be zero if the symtab lacks line numbers
2071 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2072 I'm not sure which, and maybe it depends on the symbol
2078 item = l->item; /* Get first line info */
2080 /* Is this file's first line closer than the first lines of other files?
2081 If so, record this file, and its first line, as best alternate. */
2082 if (item->pc > pc && (!alt || item->pc < alt->pc))
2088 for (i = 0; i < len; i++, item++)
2090 /* Leave prev pointing to the linetable entry for the last line
2091 that started at or before PC. */
2098 /* At this point, prev points at the line whose start addr is <= pc, and
2099 item points at the next line. If we ran off the end of the linetable
2100 (pc >= start of the last line), then prev == item. If pc < start of
2101 the first line, prev will not be set. */
2103 /* Is this file's best line closer than the best in the other files?
2104 If so, record this file, and its best line, as best so far. Don't
2105 save prev if it represents the end of a function (i.e. line number
2106 0) instead of a real line. */
2108 if (prev && prev->line && (!best || prev->pc > best->pc))
2113 /* Discard BEST_END if it's before the PC of the current BEST. */
2114 if (best_end <= best->pc)
2118 /* If another line (denoted by ITEM) is in the linetable and its
2119 PC is after BEST's PC, but before the current BEST_END, then
2120 use ITEM's PC as the new best_end. */
2121 if (best && i < len && item->pc > best->pc
2122 && (best_end == 0 || best_end > item->pc))
2123 best_end = item->pc;
2129 { /* If we didn't find any line # info, just
2135 val.symtab = alt_symtab;
2136 val.line = alt->line - 1;
2138 /* Don't return line 0, that means that we didn't find the line. */
2142 val.pc = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2146 else if (best->line == 0)
2148 /* If our best fit is in a range of PC's for which no line
2149 number info is available (line number is zero) then we didn't
2150 find any valid line information. */
2155 val.symtab = best_symtab;
2156 val.line = best->line;
2158 if (best_end && (!alt || best_end < alt->pc))
2163 val.end = BLOCK_END (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK));
2165 val.section = section;
2169 /* Backward compatibility (no section) */
2171 struct symtab_and_line
2172 find_pc_line (CORE_ADDR pc, int notcurrent)
2176 section = find_pc_overlay (pc);
2177 if (pc_in_unmapped_range (pc, section))
2178 pc = overlay_mapped_address (pc, section);
2179 return find_pc_sect_line (pc, section, notcurrent);
2182 /* Find line number LINE in any symtab whose name is the same as
2185 If found, return the symtab that contains the linetable in which it was
2186 found, set *INDEX to the index in the linetable of the best entry
2187 found, and set *EXACT_MATCH nonzero if the value returned is an
2190 If not found, return NULL. */
2193 find_line_symtab (struct symtab *symtab, int line, int *index, int *exact_match)
2197 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2201 struct linetable *best_linetable;
2202 struct symtab *best_symtab;
2204 /* First try looking it up in the given symtab. */
2205 best_linetable = LINETABLE (symtab);
2206 best_symtab = symtab;
2207 best_index = find_line_common (best_linetable, line, &exact);
2208 if (best_index < 0 || !exact)
2210 /* Didn't find an exact match. So we better keep looking for
2211 another symtab with the same name. In the case of xcoff,
2212 multiple csects for one source file (produced by IBM's FORTRAN
2213 compiler) produce multiple symtabs (this is unavoidable
2214 assuming csects can be at arbitrary places in memory and that
2215 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2217 /* BEST is the smallest linenumber > LINE so far seen,
2218 or 0 if none has been seen so far.
2219 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2222 struct objfile *objfile;
2225 if (best_index >= 0)
2226 best = best_linetable->item[best_index].line;
2230 ALL_SYMTABS (objfile, s)
2232 struct linetable *l;
2235 if (strcmp (symtab->filename, s->filename) != 0)
2238 ind = find_line_common (l, line, &exact);
2248 if (best == 0 || l->item[ind].line < best)
2250 best = l->item[ind].line;
2263 *index = best_index;
2265 *exact_match = exact;
2270 /* Set the PC value for a given source file and line number and return true.
2271 Returns zero for invalid line number (and sets the PC to 0).
2272 The source file is specified with a struct symtab. */
2275 find_line_pc (struct symtab *symtab, int line, CORE_ADDR *pc)
2277 struct linetable *l;
2284 symtab = find_line_symtab (symtab, line, &ind, NULL);
2287 l = LINETABLE (symtab);
2288 *pc = l->item[ind].pc;
2295 /* Find the range of pc values in a line.
2296 Store the starting pc of the line into *STARTPTR
2297 and the ending pc (start of next line) into *ENDPTR.
2298 Returns 1 to indicate success.
2299 Returns 0 if could not find the specified line. */
2302 find_line_pc_range (struct symtab_and_line sal, CORE_ADDR *startptr,
2305 CORE_ADDR startaddr;
2306 struct symtab_and_line found_sal;
2309 if (startaddr == 0 && !find_line_pc (sal.symtab, sal.line, &startaddr))
2312 /* This whole function is based on address. For example, if line 10 has
2313 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2314 "info line *0x123" should say the line goes from 0x100 to 0x200
2315 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2316 This also insures that we never give a range like "starts at 0x134
2317 and ends at 0x12c". */
2319 found_sal = find_pc_sect_line (startaddr, sal.section, 0);
2320 if (found_sal.line != sal.line)
2322 /* The specified line (sal) has zero bytes. */
2323 *startptr = found_sal.pc;
2324 *endptr = found_sal.pc;
2328 *startptr = found_sal.pc;
2329 *endptr = found_sal.end;
2334 /* Given a line table and a line number, return the index into the line
2335 table for the pc of the nearest line whose number is >= the specified one.
2336 Return -1 if none is found. The value is >= 0 if it is an index.
2338 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2341 find_line_common (struct linetable *l, int lineno,
2347 /* BEST is the smallest linenumber > LINENO so far seen,
2348 or 0 if none has been seen so far.
2349 BEST_INDEX identifies the item for it. */
2351 int best_index = -1;
2360 for (i = 0; i < len; i++)
2362 struct linetable_entry *item = &(l->item[i]);
2364 if (item->line == lineno)
2366 /* Return the first (lowest address) entry which matches. */
2371 if (item->line > lineno && (best == 0 || item->line < best))
2378 /* If we got here, we didn't get an exact match. */
2385 find_pc_line_pc_range (CORE_ADDR pc, CORE_ADDR *startptr, CORE_ADDR *endptr)
2387 struct symtab_and_line sal;
2388 sal = find_pc_line (pc, 0);
2391 return sal.symtab != 0;
2394 /* Given a function symbol SYM, find the symtab and line for the start
2396 If the argument FUNFIRSTLINE is nonzero, we want the first line
2397 of real code inside the function. */
2399 struct symtab_and_line
2400 find_function_start_sal (struct symbol *sym, int funfirstline)
2403 struct symtab_and_line sal;
2405 pc = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
2406 fixup_symbol_section (sym, NULL);
2408 { /* skip "first line" of function (which is actually its prologue) */
2409 asection *section = SYMBOL_BFD_SECTION (sym);
2410 /* If function is in an unmapped overlay, use its unmapped LMA
2411 address, so that SKIP_PROLOGUE has something unique to work on */
2412 if (section_is_overlay (section) &&
2413 !section_is_mapped (section))
2414 pc = overlay_unmapped_address (pc, section);
2416 pc += DEPRECATED_FUNCTION_START_OFFSET;
2417 pc = SKIP_PROLOGUE (pc);
2419 /* For overlays, map pc back into its mapped VMA range */
2420 pc = overlay_mapped_address (pc, section);
2422 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2424 /* Check if SKIP_PROLOGUE left us in mid-line, and the next
2425 line is still part of the same function. */
2427 && BLOCK_START (SYMBOL_BLOCK_VALUE (sym)) <= sal.end
2428 && sal.end < BLOCK_END (SYMBOL_BLOCK_VALUE (sym)))
2430 /* First pc of next line */
2432 /* Recalculate the line number (might not be N+1). */
2433 sal = find_pc_sect_line (pc, SYMBOL_BFD_SECTION (sym), 0);
2440 /* If P is of the form "operator[ \t]+..." where `...' is
2441 some legitimate operator text, return a pointer to the
2442 beginning of the substring of the operator text.
2443 Otherwise, return "". */
2445 operator_chars (char *p, char **end)
2448 if (strncmp (p, "operator", 8))
2452 /* Don't get faked out by `operator' being part of a longer
2454 if (isalpha (*p) || *p == '_' || *p == '$' || *p == '\0')
2457 /* Allow some whitespace between `operator' and the operator symbol. */
2458 while (*p == ' ' || *p == '\t')
2461 /* Recognize 'operator TYPENAME'. */
2463 if (isalpha (*p) || *p == '_' || *p == '$')
2466 while (isalnum (*q) || *q == '_' || *q == '$')
2475 case '\\': /* regexp quoting */
2478 if (p[2] == '=') /* 'operator\*=' */
2480 else /* 'operator\*' */
2484 else if (p[1] == '[')
2487 error ("mismatched quoting on brackets, try 'operator\\[\\]'");
2488 else if (p[2] == '\\' && p[3] == ']')
2490 *end = p + 4; /* 'operator\[\]' */
2494 error ("nothing is allowed between '[' and ']'");
2498 /* Gratuitous qoute: skip it and move on. */
2520 if (p[0] == '-' && p[1] == '>')
2522 /* Struct pointer member operator 'operator->'. */
2525 *end = p + 3; /* 'operator->*' */
2528 else if (p[2] == '\\')
2530 *end = p + 4; /* Hopefully 'operator->\*' */
2535 *end = p + 2; /* 'operator->' */
2539 if (p[1] == '=' || p[1] == p[0])
2550 error ("`operator ()' must be specified without whitespace in `()'");
2555 error ("`operator ?:' must be specified without whitespace in `?:'");
2560 error ("`operator []' must be specified without whitespace in `[]'");
2564 error ("`operator %s' not supported", p);
2573 /* If FILE is not already in the table of files, return zero;
2574 otherwise return non-zero. Optionally add FILE to the table if ADD
2575 is non-zero. If *FIRST is non-zero, forget the old table
2578 filename_seen (const char *file, int add, int *first)
2580 /* Table of files seen so far. */
2581 static const char **tab = NULL;
2582 /* Allocated size of tab in elements.
2583 Start with one 256-byte block (when using GNU malloc.c).
2584 24 is the malloc overhead when range checking is in effect. */
2585 static int tab_alloc_size = (256 - 24) / sizeof (char *);
2586 /* Current size of tab in elements. */
2587 static int tab_cur_size;
2593 tab = (const char **) xmalloc (tab_alloc_size * sizeof (*tab));
2597 /* Is FILE in tab? */
2598 for (p = tab; p < tab + tab_cur_size; p++)
2599 if (strcmp (*p, file) == 0)
2602 /* No; maybe add it to tab. */
2605 if (tab_cur_size == tab_alloc_size)
2607 tab_alloc_size *= 2;
2608 tab = (const char **) xrealloc ((char *) tab,
2609 tab_alloc_size * sizeof (*tab));
2611 tab[tab_cur_size++] = file;
2617 /* Slave routine for sources_info. Force line breaks at ,'s.
2618 NAME is the name to print and *FIRST is nonzero if this is the first
2619 name printed. Set *FIRST to zero. */
2621 output_source_filename (char *name, int *first)
2623 /* Since a single source file can result in several partial symbol
2624 tables, we need to avoid printing it more than once. Note: if
2625 some of the psymtabs are read in and some are not, it gets
2626 printed both under "Source files for which symbols have been
2627 read" and "Source files for which symbols will be read in on
2628 demand". I consider this a reasonable way to deal with the
2629 situation. I'm not sure whether this can also happen for
2630 symtabs; it doesn't hurt to check. */
2632 /* Was NAME already seen? */
2633 if (filename_seen (name, 1, first))
2635 /* Yes; don't print it again. */
2638 /* No; print it and reset *FIRST. */
2645 printf_filtered (", ");
2649 fputs_filtered (name, gdb_stdout);
2653 sources_info (char *ignore, int from_tty)
2656 struct partial_symtab *ps;
2657 struct objfile *objfile;
2660 if (!have_full_symbols () && !have_partial_symbols ())
2662 error ("No symbol table is loaded. Use the \"file\" command.");
2665 printf_filtered ("Source files for which symbols have been read in:\n\n");
2668 ALL_SYMTABS (objfile, s)
2670 output_source_filename (s->filename, &first);
2672 printf_filtered ("\n\n");
2674 printf_filtered ("Source files for which symbols will be read in on demand:\n\n");
2677 ALL_PSYMTABS (objfile, ps)
2681 output_source_filename (ps->filename, &first);
2684 printf_filtered ("\n");
2688 file_matches (char *file, char *files[], int nfiles)
2692 if (file != NULL && nfiles != 0)
2694 for (i = 0; i < nfiles; i++)
2696 if (strcmp (files[i], lbasename (file)) == 0)
2700 else if (nfiles == 0)
2705 /* Free any memory associated with a search. */
2707 free_search_symbols (struct symbol_search *symbols)
2709 struct symbol_search *p;
2710 struct symbol_search *next;
2712 for (p = symbols; p != NULL; p = next)
2720 do_free_search_symbols_cleanup (void *symbols)
2722 free_search_symbols (symbols);
2726 make_cleanup_free_search_symbols (struct symbol_search *symbols)
2728 return make_cleanup (do_free_search_symbols_cleanup, symbols);
2731 /* Helper function for sort_search_symbols and qsort. Can only
2732 sort symbols, not minimal symbols. */
2734 compare_search_syms (const void *sa, const void *sb)
2736 struct symbol_search **sym_a = (struct symbol_search **) sa;
2737 struct symbol_search **sym_b = (struct symbol_search **) sb;
2739 return strcmp (SYMBOL_PRINT_NAME ((*sym_a)->symbol),
2740 SYMBOL_PRINT_NAME ((*sym_b)->symbol));
2743 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
2744 prevtail where it is, but update its next pointer to point to
2745 the first of the sorted symbols. */
2746 static struct symbol_search *
2747 sort_search_symbols (struct symbol_search *prevtail, int nfound)
2749 struct symbol_search **symbols, *symp, *old_next;
2752 symbols = (struct symbol_search **) xmalloc (sizeof (struct symbol_search *)
2754 symp = prevtail->next;
2755 for (i = 0; i < nfound; i++)
2760 /* Generally NULL. */
2763 qsort (symbols, nfound, sizeof (struct symbol_search *),
2764 compare_search_syms);
2767 for (i = 0; i < nfound; i++)
2769 symp->next = symbols[i];
2772 symp->next = old_next;
2778 /* Search the symbol table for matches to the regular expression REGEXP,
2779 returning the results in *MATCHES.
2781 Only symbols of KIND are searched:
2782 FUNCTIONS_DOMAIN - search all functions
2783 TYPES_DOMAIN - search all type names
2784 METHODS_DOMAIN - search all methods NOT IMPLEMENTED
2785 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
2786 and constants (enums)
2788 free_search_symbols should be called when *MATCHES is no longer needed.
2790 The results are sorted locally; each symtab's global and static blocks are
2791 separately alphabetized.
2794 search_symbols (char *regexp, domain_enum kind, int nfiles, char *files[],
2795 struct symbol_search **matches)
2798 struct partial_symtab *ps;
2799 struct blockvector *bv;
2800 struct blockvector *prev_bv = 0;
2803 struct dict_iterator iter;
2805 struct partial_symbol **psym;
2806 struct objfile *objfile;
2807 struct minimal_symbol *msymbol;
2810 static enum minimal_symbol_type types[]
2812 {mst_data, mst_text, mst_abs, mst_unknown};
2813 static enum minimal_symbol_type types2[]
2815 {mst_bss, mst_file_text, mst_abs, mst_unknown};
2816 static enum minimal_symbol_type types3[]
2818 {mst_file_data, mst_solib_trampoline, mst_abs, mst_unknown};
2819 static enum minimal_symbol_type types4[]
2821 {mst_file_bss, mst_text, mst_abs, mst_unknown};
2822 enum minimal_symbol_type ourtype;
2823 enum minimal_symbol_type ourtype2;
2824 enum minimal_symbol_type ourtype3;
2825 enum minimal_symbol_type ourtype4;
2826 struct symbol_search *sr;
2827 struct symbol_search *psr;
2828 struct symbol_search *tail;
2829 struct cleanup *old_chain = NULL;
2831 if (kind < VARIABLES_DOMAIN)
2832 error ("must search on specific domain");
2834 ourtype = types[(int) (kind - VARIABLES_DOMAIN)];
2835 ourtype2 = types2[(int) (kind - VARIABLES_DOMAIN)];
2836 ourtype3 = types3[(int) (kind - VARIABLES_DOMAIN)];
2837 ourtype4 = types4[(int) (kind - VARIABLES_DOMAIN)];
2839 sr = *matches = NULL;
2844 /* Make sure spacing is right for C++ operators.
2845 This is just a courtesy to make the matching less sensitive
2846 to how many spaces the user leaves between 'operator'
2847 and <TYPENAME> or <OPERATOR>. */
2849 char *opname = operator_chars (regexp, &opend);
2852 int fix = -1; /* -1 means ok; otherwise number of spaces needed. */
2853 if (isalpha (*opname) || *opname == '_' || *opname == '$')
2855 /* There should 1 space between 'operator' and 'TYPENAME'. */
2856 if (opname[-1] != ' ' || opname[-2] == ' ')
2861 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
2862 if (opname[-1] == ' ')
2865 /* If wrong number of spaces, fix it. */
2868 char *tmp = (char *) alloca (8 + fix + strlen (opname) + 1);
2869 sprintf (tmp, "operator%.*s%s", fix, " ", opname);
2874 if (0 != (val = re_comp (regexp)))
2875 error ("Invalid regexp (%s): %s", val, regexp);
2878 /* Search through the partial symtabs *first* for all symbols
2879 matching the regexp. That way we don't have to reproduce all of
2880 the machinery below. */
2882 ALL_PSYMTABS (objfile, ps)
2884 struct partial_symbol **bound, **gbound, **sbound;
2890 gbound = objfile->global_psymbols.list + ps->globals_offset + ps->n_global_syms;
2891 sbound = objfile->static_psymbols.list + ps->statics_offset + ps->n_static_syms;
2894 /* Go through all of the symbols stored in a partial
2895 symtab in one loop. */
2896 psym = objfile->global_psymbols.list + ps->globals_offset;
2901 if (bound == gbound && ps->n_static_syms != 0)
2903 psym = objfile->static_psymbols.list + ps->statics_offset;
2914 /* If it would match (logic taken from loop below)
2915 load the file and go on to the next one */
2916 if (file_matches (ps->filename, files, nfiles)
2918 || re_exec (SYMBOL_NATURAL_NAME (*psym)) != 0)
2919 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (*psym) != LOC_TYPEDEF
2920 && SYMBOL_CLASS (*psym) != LOC_BLOCK)
2921 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK)
2922 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (*psym) == LOC_TYPEDEF)
2923 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (*psym) == LOC_BLOCK))))
2925 PSYMTAB_TO_SYMTAB (ps);
2933 /* Here, we search through the minimal symbol tables for functions
2934 and variables that match, and force their symbols to be read.
2935 This is in particular necessary for demangled variable names,
2936 which are no longer put into the partial symbol tables.
2937 The symbol will then be found during the scan of symtabs below.
2939 For functions, find_pc_symtab should succeed if we have debug info
2940 for the function, for variables we have to call lookup_symbol
2941 to determine if the variable has debug info.
2942 If the lookup fails, set found_misc so that we will rescan to print
2943 any matching symbols without debug info.
2946 if (nfiles == 0 && (kind == VARIABLES_DOMAIN || kind == FUNCTIONS_DOMAIN))
2948 ALL_MSYMBOLS (objfile, msymbol)
2950 if (MSYMBOL_TYPE (msymbol) == ourtype ||
2951 MSYMBOL_TYPE (msymbol) == ourtype2 ||
2952 MSYMBOL_TYPE (msymbol) == ourtype3 ||
2953 MSYMBOL_TYPE (msymbol) == ourtype4)
2956 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
2958 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol)))
2960 /* FIXME: carlton/2003-02-04: Given that the
2961 semantics of lookup_symbol keeps on changing
2962 slightly, it would be a nice idea if we had a
2963 function lookup_symbol_minsym that found the
2964 symbol associated to a given minimal symbol (if
2966 if (kind == FUNCTIONS_DOMAIN
2967 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
2968 (struct block *) NULL,
2970 0, (struct symtab **) NULL) == NULL)
2978 ALL_SYMTABS (objfile, s)
2980 bv = BLOCKVECTOR (s);
2981 /* Often many files share a blockvector.
2982 Scan each blockvector only once so that
2983 we don't get every symbol many times.
2984 It happens that the first symtab in the list
2985 for any given blockvector is the main file. */
2987 for (i = GLOBAL_BLOCK; i <= STATIC_BLOCK; i++)
2989 struct symbol_search *prevtail = tail;
2991 b = BLOCKVECTOR_BLOCK (bv, i);
2992 ALL_BLOCK_SYMBOLS (b, iter, sym)
2995 if (file_matches (s->filename, files, nfiles)
2997 || re_exec (SYMBOL_NATURAL_NAME (sym)) != 0)
2998 && ((kind == VARIABLES_DOMAIN && SYMBOL_CLASS (sym) != LOC_TYPEDEF
2999 && SYMBOL_CLASS (sym) != LOC_BLOCK
3000 && SYMBOL_CLASS (sym) != LOC_CONST)
3001 || (kind == FUNCTIONS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK)
3002 || (kind == TYPES_DOMAIN && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3003 || (kind == METHODS_DOMAIN && SYMBOL_CLASS (sym) == LOC_BLOCK))))
3006 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3010 psr->msymbol = NULL;
3022 if (prevtail == NULL)
3024 struct symbol_search dummy;
3027 tail = sort_search_symbols (&dummy, nfound);
3030 old_chain = make_cleanup_free_search_symbols (sr);
3033 tail = sort_search_symbols (prevtail, nfound);
3039 /* If there are no eyes, avoid all contact. I mean, if there are
3040 no debug symbols, then print directly from the msymbol_vector. */
3042 if (found_misc || kind != FUNCTIONS_DOMAIN)
3044 ALL_MSYMBOLS (objfile, msymbol)
3046 if (MSYMBOL_TYPE (msymbol) == ourtype ||
3047 MSYMBOL_TYPE (msymbol) == ourtype2 ||
3048 MSYMBOL_TYPE (msymbol) == ourtype3 ||
3049 MSYMBOL_TYPE (msymbol) == ourtype4)
3052 || re_exec (SYMBOL_NATURAL_NAME (msymbol)) != 0)
3054 /* Functions: Look up by address. */
3055 if (kind != FUNCTIONS_DOMAIN ||
3056 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol))))
3058 /* Variables/Absolutes: Look up by name */
3059 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol),
3060 (struct block *) NULL, VAR_DOMAIN,
3061 0, (struct symtab **) NULL) == NULL)
3064 psr = (struct symbol_search *) xmalloc (sizeof (struct symbol_search));
3066 psr->msymbol = msymbol;
3073 old_chain = make_cleanup_free_search_symbols (sr);
3087 discard_cleanups (old_chain);
3090 /* Helper function for symtab_symbol_info, this function uses
3091 the data returned from search_symbols() to print information
3092 regarding the match to gdb_stdout.
3095 print_symbol_info (domain_enum kind, struct symtab *s, struct symbol *sym,
3096 int block, char *last)
3098 if (last == NULL || strcmp (last, s->filename) != 0)
3100 fputs_filtered ("\nFile ", gdb_stdout);
3101 fputs_filtered (s->filename, gdb_stdout);
3102 fputs_filtered (":\n", gdb_stdout);
3105 if (kind != TYPES_DOMAIN && block == STATIC_BLOCK)
3106 printf_filtered ("static ");
3108 /* Typedef that is not a C++ class */
3109 if (kind == TYPES_DOMAIN
3110 && SYMBOL_DOMAIN (sym) != STRUCT_DOMAIN)
3111 typedef_print (SYMBOL_TYPE (sym), sym, gdb_stdout);
3112 /* variable, func, or typedef-that-is-c++-class */
3113 else if (kind < TYPES_DOMAIN ||
3114 (kind == TYPES_DOMAIN &&
3115 SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN))
3117 type_print (SYMBOL_TYPE (sym),
3118 (SYMBOL_CLASS (sym) == LOC_TYPEDEF
3119 ? "" : SYMBOL_PRINT_NAME (sym)),
3122 printf_filtered (";\n");
3126 /* This help function for symtab_symbol_info() prints information
3127 for non-debugging symbols to gdb_stdout.
3130 print_msymbol_info (struct minimal_symbol *msymbol)
3134 if (TARGET_ADDR_BIT <= 32)
3135 tmp = local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol)
3136 & (CORE_ADDR) 0xffffffff,
3139 tmp = local_hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol),
3141 printf_filtered ("%s %s\n",
3142 tmp, SYMBOL_PRINT_NAME (msymbol));
3145 /* This is the guts of the commands "info functions", "info types", and
3146 "info variables". It calls search_symbols to find all matches and then
3147 print_[m]symbol_info to print out some useful information about the
3151 symtab_symbol_info (char *regexp, domain_enum kind, int from_tty)
3153 static char *classnames[]
3155 {"variable", "function", "type", "method"};
3156 struct symbol_search *symbols;
3157 struct symbol_search *p;
3158 struct cleanup *old_chain;
3159 char *last_filename = NULL;
3162 /* must make sure that if we're interrupted, symbols gets freed */
3163 search_symbols (regexp, kind, 0, (char **) NULL, &symbols);
3164 old_chain = make_cleanup_free_search_symbols (symbols);
3166 printf_filtered (regexp
3167 ? "All %ss matching regular expression \"%s\":\n"
3168 : "All defined %ss:\n",
3169 classnames[(int) (kind - VARIABLES_DOMAIN)], regexp);
3171 for (p = symbols; p != NULL; p = p->next)
3175 if (p->msymbol != NULL)
3179 printf_filtered ("\nNon-debugging symbols:\n");
3182 print_msymbol_info (p->msymbol);
3186 print_symbol_info (kind,
3191 last_filename = p->symtab->filename;
3195 do_cleanups (old_chain);
3199 variables_info (char *regexp, int from_tty)
3201 symtab_symbol_info (regexp, VARIABLES_DOMAIN, from_tty);
3205 functions_info (char *regexp, int from_tty)
3207 symtab_symbol_info (regexp, FUNCTIONS_DOMAIN, from_tty);
3212 types_info (char *regexp, int from_tty)
3214 symtab_symbol_info (regexp, TYPES_DOMAIN, from_tty);
3217 /* Breakpoint all functions matching regular expression. */
3220 rbreak_command_wrapper (char *regexp, int from_tty)
3222 rbreak_command (regexp, from_tty);
3226 rbreak_command (char *regexp, int from_tty)
3228 struct symbol_search *ss;
3229 struct symbol_search *p;
3230 struct cleanup *old_chain;
3232 search_symbols (regexp, FUNCTIONS_DOMAIN, 0, (char **) NULL, &ss);
3233 old_chain = make_cleanup_free_search_symbols (ss);
3235 for (p = ss; p != NULL; p = p->next)
3237 if (p->msymbol == NULL)
3239 char *string = alloca (strlen (p->symtab->filename)
3240 + strlen (SYMBOL_LINKAGE_NAME (p->symbol))
3242 strcpy (string, p->symtab->filename);
3243 strcat (string, ":'");
3244 strcat (string, SYMBOL_LINKAGE_NAME (p->symbol));
3245 strcat (string, "'");
3246 break_command (string, from_tty);
3247 print_symbol_info (FUNCTIONS_DOMAIN,
3251 p->symtab->filename);
3255 break_command (SYMBOL_LINKAGE_NAME (p->msymbol), from_tty);
3256 printf_filtered ("<function, no debug info> %s;\n",
3257 SYMBOL_PRINT_NAME (p->msymbol));
3261 do_cleanups (old_chain);
3265 /* Helper routine for make_symbol_completion_list. */
3267 static int return_val_size;
3268 static int return_val_index;
3269 static char **return_val;
3271 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3272 completion_list_add_name \
3273 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3275 /* Test to see if the symbol specified by SYMNAME (which is already
3276 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3277 characters. If so, add it to the current completion list. */
3280 completion_list_add_name (char *symname, char *sym_text, int sym_text_len,
3281 char *text, char *word)
3286 /* clip symbols that cannot match */
3288 if (strncmp (symname, sym_text, sym_text_len) != 0)
3293 /* We have a match for a completion, so add SYMNAME to the current list
3294 of matches. Note that the name is moved to freshly malloc'd space. */
3298 if (word == sym_text)
3300 new = xmalloc (strlen (symname) + 5);
3301 strcpy (new, symname);
3303 else if (word > sym_text)
3305 /* Return some portion of symname. */
3306 new = xmalloc (strlen (symname) + 5);
3307 strcpy (new, symname + (word - sym_text));
3311 /* Return some of SYM_TEXT plus symname. */
3312 new = xmalloc (strlen (symname) + (sym_text - word) + 5);
3313 strncpy (new, word, sym_text - word);
3314 new[sym_text - word] = '\0';
3315 strcat (new, symname);
3318 if (return_val_index + 3 > return_val_size)
3320 newsize = (return_val_size *= 2) * sizeof (char *);
3321 return_val = (char **) xrealloc ((char *) return_val, newsize);
3323 return_val[return_val_index++] = new;
3324 return_val[return_val_index] = NULL;
3328 /* ObjC: In case we are completing on a selector, look as the msymbol
3329 again and feed all the selectors into the mill. */
3332 completion_list_objc_symbol (struct minimal_symbol *msymbol, char *sym_text,
3333 int sym_text_len, char *text, char *word)
3335 static char *tmp = NULL;
3336 static unsigned int tmplen = 0;
3338 char *method, *category, *selector;
3341 method = SYMBOL_NATURAL_NAME (msymbol);
3343 /* Is it a method? */
3344 if ((method[0] != '-') && (method[0] != '+'))
3347 if (sym_text[0] == '[')
3348 /* Complete on shortened method method. */
3349 completion_list_add_name (method + 1, sym_text, sym_text_len, text, word);
3351 while ((strlen (method) + 1) >= tmplen)
3357 tmp = xrealloc (tmp, tmplen);
3359 selector = strchr (method, ' ');
3360 if (selector != NULL)
3363 category = strchr (method, '(');
3365 if ((category != NULL) && (selector != NULL))
3367 memcpy (tmp, method, (category - method));
3368 tmp[category - method] = ' ';
3369 memcpy (tmp + (category - method) + 1, selector, strlen (selector) + 1);
3370 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3371 if (sym_text[0] == '[')
3372 completion_list_add_name (tmp + 1, sym_text, sym_text_len, text, word);
3375 if (selector != NULL)
3377 /* Complete on selector only. */
3378 strcpy (tmp, selector);
3379 tmp2 = strchr (tmp, ']');
3383 completion_list_add_name (tmp, sym_text, sym_text_len, text, word);
3387 /* Break the non-quoted text based on the characters which are in
3388 symbols. FIXME: This should probably be language-specific. */
3391 language_search_unquoted_string (char *text, char *p)
3393 for (; p > text; --p)
3395 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3399 if ((current_language->la_language == language_objc))
3401 if (p[-1] == ':') /* might be part of a method name */
3403 else if (p[-1] == '[' && (p[-2] == '-' || p[-2] == '+'))
3404 p -= 2; /* beginning of a method name */
3405 else if (p[-1] == ' ' || p[-1] == '(' || p[-1] == ')')
3406 { /* might be part of a method name */
3409 /* Seeing a ' ' or a '(' is not conclusive evidence
3410 that we are in the middle of a method name. However,
3411 finding "-[" or "+[" should be pretty un-ambiguous.
3412 Unfortunately we have to find it now to decide. */
3415 if (isalnum (t[-1]) || t[-1] == '_' ||
3416 t[-1] == ' ' || t[-1] == ':' ||
3417 t[-1] == '(' || t[-1] == ')')
3422 if (t[-1] == '[' && (t[-2] == '-' || t[-2] == '+'))
3423 p = t - 2; /* method name detected */
3424 /* else we leave with p unchanged */
3434 /* Return a NULL terminated array of all symbols (regardless of class)
3435 which begin by matching TEXT. If the answer is no symbols, then
3436 the return value is an array which contains only a NULL pointer.
3438 Problem: All of the symbols have to be copied because readline frees them.
3439 I'm not going to worry about this; hopefully there won't be that many. */
3442 make_symbol_completion_list (char *text, char *word)
3446 struct partial_symtab *ps;
3447 struct minimal_symbol *msymbol;
3448 struct objfile *objfile;
3449 struct block *b, *surrounding_static_block = 0;
3450 struct dict_iterator iter;
3452 struct partial_symbol **psym;
3453 /* The symbol we are completing on. Points in same buffer as text. */
3455 /* Length of sym_text. */
3458 /* Now look for the symbol we are supposed to complete on.
3459 FIXME: This should be language-specific. */
3463 char *quote_pos = NULL;
3465 /* First see if this is a quoted string. */
3467 for (p = text; *p != '\0'; ++p)
3469 if (quote_found != '\0')
3471 if (*p == quote_found)
3472 /* Found close quote. */
3474 else if (*p == '\\' && p[1] == quote_found)
3475 /* A backslash followed by the quote character
3476 doesn't end the string. */
3479 else if (*p == '\'' || *p == '"')
3485 if (quote_found == '\'')
3486 /* A string within single quotes can be a symbol, so complete on it. */
3487 sym_text = quote_pos + 1;
3488 else if (quote_found == '"')
3489 /* A double-quoted string is never a symbol, nor does it make sense
3490 to complete it any other way. */
3492 return_val = (char **) xmalloc (sizeof (char *));
3493 return_val[0] = NULL;
3498 /* It is not a quoted string. Break it based on the characters
3499 which are in symbols. */
3502 if (isalnum (p[-1]) || p[-1] == '_' || p[-1] == '\0')
3511 sym_text_len = strlen (sym_text);
3513 return_val_size = 100;
3514 return_val_index = 0;
3515 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3516 return_val[0] = NULL;
3518 /* Look through the partial symtabs for all symbols which begin
3519 by matching SYM_TEXT. Add each one that you find to the list. */
3521 ALL_PSYMTABS (objfile, ps)
3523 /* If the psymtab's been read in we'll get it when we search
3524 through the blockvector. */
3528 for (psym = objfile->global_psymbols.list + ps->globals_offset;
3529 psym < (objfile->global_psymbols.list + ps->globals_offset
3530 + ps->n_global_syms);
3533 /* If interrupted, then quit. */
3535 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3538 for (psym = objfile->static_psymbols.list + ps->statics_offset;
3539 psym < (objfile->static_psymbols.list + ps->statics_offset
3540 + ps->n_static_syms);
3544 COMPLETION_LIST_ADD_SYMBOL (*psym, sym_text, sym_text_len, text, word);
3548 /* At this point scan through the misc symbol vectors and add each
3549 symbol you find to the list. Eventually we want to ignore
3550 anything that isn't a text symbol (everything else will be
3551 handled by the psymtab code above). */
3553 ALL_MSYMBOLS (objfile, msymbol)
3556 COMPLETION_LIST_ADD_SYMBOL (msymbol, sym_text, sym_text_len, text, word);
3558 completion_list_objc_symbol (msymbol, sym_text, sym_text_len, text, word);
3561 /* Search upwards from currently selected frame (so that we can
3562 complete on local vars. */
3564 for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
3566 if (!BLOCK_SUPERBLOCK (b))
3568 surrounding_static_block = b; /* For elmin of dups */
3571 /* Also catch fields of types defined in this places which match our
3572 text string. Only complete on types visible from current context. */
3574 ALL_BLOCK_SYMBOLS (b, iter, sym)
3577 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3578 if (SYMBOL_CLASS (sym) == LOC_TYPEDEF)
3580 struct type *t = SYMBOL_TYPE (sym);
3581 enum type_code c = TYPE_CODE (t);
3583 if (c == TYPE_CODE_UNION || c == TYPE_CODE_STRUCT)
3585 for (j = TYPE_N_BASECLASSES (t); j < TYPE_NFIELDS (t); j++)
3587 if (TYPE_FIELD_NAME (t, j))
3589 completion_list_add_name (TYPE_FIELD_NAME (t, j),
3590 sym_text, sym_text_len, text, word);
3598 /* Go through the symtabs and check the externs and statics for
3599 symbols which match. */
3601 ALL_SYMTABS (objfile, s)
3604 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3605 ALL_BLOCK_SYMBOLS (b, iter, sym)
3607 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3611 ALL_SYMTABS (objfile, s)
3614 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3615 /* Don't do this block twice. */
3616 if (b == surrounding_static_block)
3618 ALL_BLOCK_SYMBOLS (b, iter, sym)
3620 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3624 return (return_val);
3627 /* Like make_symbol_completion_list, but returns a list of symbols
3628 defined in a source file FILE. */
3631 make_file_symbol_completion_list (char *text, char *word, char *srcfile)
3636 struct dict_iterator iter;
3637 /* The symbol we are completing on. Points in same buffer as text. */
3639 /* Length of sym_text. */
3642 /* Now look for the symbol we are supposed to complete on.
3643 FIXME: This should be language-specific. */
3647 char *quote_pos = NULL;
3649 /* First see if this is a quoted string. */
3651 for (p = text; *p != '\0'; ++p)
3653 if (quote_found != '\0')
3655 if (*p == quote_found)
3656 /* Found close quote. */
3658 else if (*p == '\\' && p[1] == quote_found)
3659 /* A backslash followed by the quote character
3660 doesn't end the string. */
3663 else if (*p == '\'' || *p == '"')
3669 if (quote_found == '\'')
3670 /* A string within single quotes can be a symbol, so complete on it. */
3671 sym_text = quote_pos + 1;
3672 else if (quote_found == '"')
3673 /* A double-quoted string is never a symbol, nor does it make sense
3674 to complete it any other way. */
3676 return_val = (char **) xmalloc (sizeof (char *));
3677 return_val[0] = NULL;
3682 /* Not a quoted string. */
3683 sym_text = language_search_unquoted_string (text, p);
3687 sym_text_len = strlen (sym_text);
3689 return_val_size = 10;
3690 return_val_index = 0;
3691 return_val = (char **) xmalloc ((return_val_size + 1) * sizeof (char *));
3692 return_val[0] = NULL;
3694 /* Find the symtab for SRCFILE (this loads it if it was not yet read
3696 s = lookup_symtab (srcfile);
3699 /* Maybe they typed the file with leading directories, while the
3700 symbol tables record only its basename. */
3701 const char *tail = lbasename (srcfile);
3704 s = lookup_symtab (tail);
3707 /* If we have no symtab for that file, return an empty list. */
3709 return (return_val);
3711 /* Go through this symtab and check the externs and statics for
3712 symbols which match. */
3714 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
3715 ALL_BLOCK_SYMBOLS (b, iter, sym)
3717 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3720 b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
3721 ALL_BLOCK_SYMBOLS (b, iter, sym)
3723 COMPLETION_LIST_ADD_SYMBOL (sym, sym_text, sym_text_len, text, word);
3726 return (return_val);
3729 /* A helper function for make_source_files_completion_list. It adds
3730 another file name to a list of possible completions, growing the
3731 list as necessary. */
3734 add_filename_to_list (const char *fname, char *text, char *word,
3735 char ***list, int *list_used, int *list_alloced)
3738 size_t fnlen = strlen (fname);
3740 if (*list_used + 1 >= *list_alloced)
3743 *list = (char **) xrealloc ((char *) *list,
3744 *list_alloced * sizeof (char *));
3749 /* Return exactly fname. */
3750 new = xmalloc (fnlen + 5);
3751 strcpy (new, fname);
3753 else if (word > text)
3755 /* Return some portion of fname. */
3756 new = xmalloc (fnlen + 5);
3757 strcpy (new, fname + (word - text));
3761 /* Return some of TEXT plus fname. */
3762 new = xmalloc (fnlen + (text - word) + 5);
3763 strncpy (new, word, text - word);
3764 new[text - word] = '\0';
3765 strcat (new, fname);
3767 (*list)[*list_used] = new;
3768 (*list)[++*list_used] = NULL;
3772 not_interesting_fname (const char *fname)
3774 static const char *illegal_aliens[] = {
3775 "_globals_", /* inserted by coff_symtab_read */
3780 for (i = 0; illegal_aliens[i]; i++)
3782 if (strcmp (fname, illegal_aliens[i]) == 0)
3788 /* Return a NULL terminated array of all source files whose names
3789 begin with matching TEXT. The file names are looked up in the
3790 symbol tables of this program. If the answer is no matchess, then
3791 the return value is an array which contains only a NULL pointer. */
3794 make_source_files_completion_list (char *text, char *word)
3797 struct partial_symtab *ps;
3798 struct objfile *objfile;
3800 int list_alloced = 1;
3802 size_t text_len = strlen (text);
3803 char **list = (char **) xmalloc (list_alloced * sizeof (char *));
3804 const char *base_name;
3808 if (!have_full_symbols () && !have_partial_symbols ())
3811 ALL_SYMTABS (objfile, s)
3813 if (not_interesting_fname (s->filename))
3815 if (!filename_seen (s->filename, 1, &first)
3816 #if HAVE_DOS_BASED_FILE_SYSTEM
3817 && strncasecmp (s->filename, text, text_len) == 0
3819 && strncmp (s->filename, text, text_len) == 0
3823 /* This file matches for a completion; add it to the current
3825 add_filename_to_list (s->filename, text, word,
3826 &list, &list_used, &list_alloced);
3830 /* NOTE: We allow the user to type a base name when the
3831 debug info records leading directories, but not the other
3832 way around. This is what subroutines of breakpoint
3833 command do when they parse file names. */
3834 base_name = lbasename (s->filename);
3835 if (base_name != s->filename
3836 && !filename_seen (base_name, 1, &first)
3837 #if HAVE_DOS_BASED_FILE_SYSTEM
3838 && strncasecmp (base_name, text, text_len) == 0
3840 && strncmp (base_name, text, text_len) == 0
3843 add_filename_to_list (base_name, text, word,
3844 &list, &list_used, &list_alloced);
3848 ALL_PSYMTABS (objfile, ps)
3850 if (not_interesting_fname (ps->filename))
3854 if (!filename_seen (ps->filename, 1, &first)
3855 #if HAVE_DOS_BASED_FILE_SYSTEM
3856 && strncasecmp (ps->filename, text, text_len) == 0
3858 && strncmp (ps->filename, text, text_len) == 0
3862 /* This file matches for a completion; add it to the
3863 current list of matches. */
3864 add_filename_to_list (ps->filename, text, word,
3865 &list, &list_used, &list_alloced);
3870 base_name = lbasename (ps->filename);
3871 if (base_name != ps->filename
3872 && !filename_seen (base_name, 1, &first)
3873 #if HAVE_DOS_BASED_FILE_SYSTEM
3874 && strncasecmp (base_name, text, text_len) == 0
3876 && strncmp (base_name, text, text_len) == 0
3879 add_filename_to_list (base_name, text, word,
3880 &list, &list_used, &list_alloced);
3888 /* Determine if PC is in the prologue of a function. The prologue is the area
3889 between the first instruction of a function, and the first executable line.
3890 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
3892 If non-zero, func_start is where we think the prologue starts, possibly
3893 by previous examination of symbol table information.
3897 in_prologue (CORE_ADDR pc, CORE_ADDR func_start)
3899 struct symtab_and_line sal;
3900 CORE_ADDR func_addr, func_end;
3902 /* We have several sources of information we can consult to figure
3904 - Compilers usually emit line number info that marks the prologue
3905 as its own "source line". So the ending address of that "line"
3906 is the end of the prologue. If available, this is the most
3908 - The minimal symbols and partial symbols, which can usually tell
3909 us the starting and ending addresses of a function.
3910 - If we know the function's start address, we can call the
3911 architecture-defined SKIP_PROLOGUE function to analyze the
3912 instruction stream and guess where the prologue ends.
3913 - Our `func_start' argument; if non-zero, this is the caller's
3914 best guess as to the function's entry point. At the time of
3915 this writing, handle_inferior_event doesn't get this right, so
3916 it should be our last resort. */
3918 /* Consult the partial symbol table, to find which function
3920 if (! find_pc_partial_function (pc, NULL, &func_addr, &func_end))
3922 CORE_ADDR prologue_end;
3924 /* We don't even have minsym information, so fall back to using
3925 func_start, if given. */
3927 return 1; /* We *might* be in a prologue. */
3929 prologue_end = SKIP_PROLOGUE (func_start);
3931 return func_start <= pc && pc < prologue_end;
3934 /* If we have line number information for the function, that's
3935 usually pretty reliable. */
3936 sal = find_pc_line (func_addr, 0);
3938 /* Now sal describes the source line at the function's entry point,
3939 which (by convention) is the prologue. The end of that "line",
3940 sal.end, is the end of the prologue.
3942 Note that, for functions whose source code is all on a single
3943 line, the line number information doesn't always end up this way.
3944 So we must verify that our purported end-of-prologue address is
3945 *within* the function, not at its start or end. */
3947 || sal.end <= func_addr
3948 || func_end <= sal.end)
3950 /* We don't have any good line number info, so use the minsym
3951 information, together with the architecture-specific prologue
3953 CORE_ADDR prologue_end = SKIP_PROLOGUE (func_addr);
3955 return func_addr <= pc && pc < prologue_end;
3958 /* We have line number info, and it looks good. */
3959 return func_addr <= pc && pc < sal.end;
3962 /* Given PC at the function's start address, attempt to find the
3963 prologue end using SAL information. Return zero if the skip fails.
3965 A non-optimized prologue traditionally has one SAL for the function
3966 and a second for the function body. A single line function has
3967 them both pointing at the same line.
3969 An optimized prologue is similar but the prologue may contain
3970 instructions (SALs) from the instruction body. Need to skip those
3971 while not getting into the function body.
3973 The functions end point and an increasing SAL line are used as
3974 indicators of the prologue's endpoint.
3976 This code is based on the function refine_prologue_limit (versions
3977 found in both ia64 and ppc). */
3980 skip_prologue_using_sal (CORE_ADDR func_addr)
3982 struct symtab_and_line prologue_sal;
3986 /* Get an initial range for the function. */
3987 find_pc_partial_function (func_addr, NULL, &start_pc, &end_pc);
3988 start_pc += DEPRECATED_FUNCTION_START_OFFSET;
3990 prologue_sal = find_pc_line (start_pc, 0);
3991 if (prologue_sal.line != 0)
3993 while (prologue_sal.end < end_pc)
3995 struct symtab_and_line sal;
3997 sal = find_pc_line (prologue_sal.end, 0);
4000 /* Assume that a consecutive SAL for the same (or larger)
4001 line mark the prologue -> body transition. */
4002 if (sal.line >= prologue_sal.line)
4004 /* The case in which compiler's optimizer/scheduler has
4005 moved instructions into the prologue. We look ahead in
4006 the function looking for address ranges whose
4007 corresponding line number is less the first one that we
4008 found for the function. This is more conservative then
4009 refine_prologue_limit which scans a large number of SALs
4010 looking for any in the prologue */
4014 return prologue_sal.end;
4017 struct symtabs_and_lines
4018 decode_line_spec (char *string, int funfirstline)
4020 struct symtabs_and_lines sals;
4021 struct symtab_and_line cursal;
4024 error ("Empty line specification.");
4026 /* We use whatever is set as the current source line. We do not try
4027 and get a default or it will recursively call us! */
4028 cursal = get_current_source_symtab_and_line ();
4030 sals = decode_line_1 (&string, funfirstline,
4031 cursal.symtab, cursal.line,
4032 (char ***) NULL, NULL);
4035 error ("Junk at end of line specification: %s", string);
4040 static char *name_of_main;
4043 set_main_name (const char *name)
4045 if (name_of_main != NULL)
4047 xfree (name_of_main);
4048 name_of_main = NULL;
4052 name_of_main = xstrdup (name);
4059 if (name_of_main != NULL)
4060 return name_of_main;
4067 _initialize_symtab (void)
4069 add_info ("variables", variables_info,
4070 "All global and static variable names, or those matching REGEXP.");
4072 add_com ("whereis", class_info, variables_info,
4073 "All global and static variable names, or those matching REGEXP.");
4075 add_info ("functions", functions_info,
4076 "All function names, or those matching REGEXP.");
4079 /* FIXME: This command has at least the following problems:
4080 1. It prints builtin types (in a very strange and confusing fashion).
4081 2. It doesn't print right, e.g. with
4082 typedef struct foo *FOO
4083 type_print prints "FOO" when we want to make it (in this situation)
4084 print "struct foo *".
4085 I also think "ptype" or "whatis" is more likely to be useful (but if
4086 there is much disagreement "info types" can be fixed). */
4087 add_info ("types", types_info,
4088 "All type names, or those matching REGEXP.");
4090 add_info ("sources", sources_info,
4091 "Source files in the program.");
4093 add_com ("rbreak", class_breakpoint, rbreak_command,
4094 "Set a breakpoint for all functions matching REGEXP.");
4098 add_com ("lf", class_info, sources_info, "Source files in the program");
4099 add_com ("lg", class_info, variables_info,
4100 "All global and static variable names, or those matching REGEXP.");
4103 /* Initialize the one built-in type that isn't language dependent... */
4104 builtin_type_error = init_type (TYPE_CODE_ERROR, 0, 0,
4105 "<unknown type>", (struct objfile *) NULL);