1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2004, 2007-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "call-cmds.h"
31 #include "gdb_regex.h"
32 #include "expression.h"
38 #include "filenames.h" /* for FILENAME_CMP */
39 #include "objc-lang.h"
48 #include "gdb_obstack.h"
50 #include "dictionary.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
58 #include "cp-support.h"
60 #include "gdb_assert.h"
63 #include "macroscope.h"
67 /* Prototypes for local functions */
69 static void rbreak_command (char *, int);
71 static void types_info (char *, int);
73 static void functions_info (char *, int);
75 static void variables_info (char *, int);
77 static void sources_info (char *, int);
79 static void output_source_filename (const char *, int *);
81 static int find_line_common (struct linetable
*, int, int *, int);
83 static struct symbol
*lookup_symbol_aux (const char *name
,
84 const struct block
*block
,
85 const domain_enum domain
,
86 enum language language
,
87 int *is_a_field_of_this
);
90 struct symbol
*lookup_symbol_aux_local (const char *name
,
91 const struct block
*block
,
92 const domain_enum domain
,
93 enum language language
);
96 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
98 const domain_enum domain
);
101 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
104 const domain_enum domain
);
106 static void print_msymbol_info (struct minimal_symbol
*);
108 void _initialize_symtab (void);
112 /* Non-zero if a file may be known by two different basenames.
113 This is the uncommon case, and significantly slows down gdb.
114 Default set to "off" to not slow down the common case. */
115 int basenames_may_differ
= 0;
117 /* Allow the user to configure the debugger behavior with respect
118 to multiple-choice menus when more than one symbol matches during
121 const char multiple_symbols_ask
[] = "ask";
122 const char multiple_symbols_all
[] = "all";
123 const char multiple_symbols_cancel
[] = "cancel";
124 static const char *const multiple_symbols_modes
[] =
126 multiple_symbols_ask
,
127 multiple_symbols_all
,
128 multiple_symbols_cancel
,
131 static const char *multiple_symbols_mode
= multiple_symbols_all
;
133 /* Read-only accessor to AUTO_SELECT_MODE. */
136 multiple_symbols_select_mode (void)
138 return multiple_symbols_mode
;
141 /* Block in which the most recently searched-for symbol was found.
142 Might be better to make this a parameter to lookup_symbol and
145 const struct block
*block_found
;
147 /* See whether FILENAME matches SEARCH_NAME using the rule that we
148 advertise to the user. (The manual's description of linespecs
149 describes what we advertise). SEARCH_LEN is the length of
150 SEARCH_NAME. We assume that SEARCH_NAME is a relative path.
151 Returns true if they match, false otherwise. */
154 compare_filenames_for_search (const char *filename
, const char *search_name
,
157 int len
= strlen (filename
);
159 if (len
< search_len
)
162 /* The tail of FILENAME must match. */
163 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
166 /* Either the names must completely match, or the character
167 preceding the trailing SEARCH_NAME segment of FILENAME must be a
168 directory separator. */
169 return (len
== search_len
170 || IS_DIR_SEPARATOR (filename
[len
- search_len
- 1])
171 || (HAS_DRIVE_SPEC (filename
)
172 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
175 /* Check for a symtab of a specific name by searching some symtabs.
176 This is a helper function for callbacks of iterate_over_symtabs.
178 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
179 are identical to the `map_symtabs_matching_filename' method of
180 quick_symbol_functions.
182 FIRST and AFTER_LAST indicate the range of symtabs to search.
183 AFTER_LAST is one past the last symtab to search; NULL means to
184 search until the end of the list. */
187 iterate_over_some_symtabs (const char *name
,
188 const char *full_path
,
189 const char *real_path
,
190 int (*callback
) (struct symtab
*symtab
,
193 struct symtab
*first
,
194 struct symtab
*after_last
)
196 struct symtab
*s
= NULL
;
197 const char* base_name
= lbasename (name
);
198 int name_len
= strlen (name
);
199 int is_abs
= IS_ABSOLUTE_PATH (name
);
201 for (s
= first
; s
!= NULL
&& s
!= after_last
; s
= s
->next
)
203 /* Exact match is always ok. */
204 if (FILENAME_CMP (name
, s
->filename
) == 0)
206 if (callback (s
, data
))
210 if (!is_abs
&& compare_filenames_for_search (s
->filename
, name
, name_len
))
212 if (callback (s
, data
))
216 /* Before we invoke realpath, which can get expensive when many
217 files are involved, do a quick comparison of the basenames. */
218 if (! basenames_may_differ
219 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
222 /* If the user gave us an absolute path, try to find the file in
223 this symtab and use its absolute path. */
225 if (full_path
!= NULL
)
227 const char *fp
= symtab_to_fullname (s
);
229 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
231 if (callback (s
, data
))
235 if (fp
!= NULL
&& !is_abs
&& compare_filenames_for_search (fp
, name
,
238 if (callback (s
, data
))
243 if (real_path
!= NULL
)
245 char *fullname
= symtab_to_fullname (s
);
247 if (fullname
!= NULL
)
249 char *rp
= gdb_realpath (fullname
);
251 make_cleanup (xfree
, rp
);
252 if (FILENAME_CMP (real_path
, rp
) == 0)
254 if (callback (s
, data
))
258 if (!is_abs
&& compare_filenames_for_search (rp
, name
, name_len
))
260 if (callback (s
, data
))
270 /* Check for a symtab of a specific name; first in symtabs, then in
271 psymtabs. *If* there is no '/' in the name, a match after a '/'
272 in the symtab filename will also work.
274 Calls CALLBACK with each symtab that is found and with the supplied
275 DATA. If CALLBACK returns true, the search stops. */
278 iterate_over_symtabs (const char *name
,
279 int (*callback
) (struct symtab
*symtab
,
283 struct symtab
*s
= NULL
;
284 struct objfile
*objfile
;
285 char *real_path
= NULL
;
286 char *full_path
= NULL
;
287 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
289 /* Here we are interested in canonicalizing an absolute path, not
290 absolutizing a relative path. */
291 if (IS_ABSOLUTE_PATH (name
))
293 full_path
= xfullpath (name
);
294 make_cleanup (xfree
, full_path
);
295 real_path
= gdb_realpath (name
);
296 make_cleanup (xfree
, real_path
);
299 ALL_OBJFILES (objfile
)
301 if (iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
302 objfile
->symtabs
, NULL
))
304 do_cleanups (cleanups
);
309 /* Same search rules as above apply here, but now we look thru the
312 ALL_OBJFILES (objfile
)
315 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
322 do_cleanups (cleanups
);
327 do_cleanups (cleanups
);
330 /* The callback function used by lookup_symtab. */
333 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
335 struct symtab
**result_ptr
= data
;
337 *result_ptr
= symtab
;
341 /* A wrapper for iterate_over_symtabs that returns the first matching
345 lookup_symtab (const char *name
)
347 struct symtab
*result
= NULL
;
349 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
354 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
355 full method name, which consist of the class name (from T), the unadorned
356 method name from METHOD_ID, and the signature for the specific overload,
357 specified by SIGNATURE_ID. Note that this function is g++ specific. */
360 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
362 int mangled_name_len
;
364 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
365 struct fn_field
*method
= &f
[signature_id
];
366 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
367 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
368 const char *newname
= type_name_no_tag (type
);
370 /* Does the form of physname indicate that it is the full mangled name
371 of a constructor (not just the args)? */
372 int is_full_physname_constructor
;
375 int is_destructor
= is_destructor_name (physname
);
376 /* Need a new type prefix. */
377 char *const_prefix
= method
->is_const
? "C" : "";
378 char *volatile_prefix
= method
->is_volatile
? "V" : "";
380 int len
= (newname
== NULL
? 0 : strlen (newname
));
382 /* Nothing to do if physname already contains a fully mangled v3 abi name
383 or an operator name. */
384 if ((physname
[0] == '_' && physname
[1] == 'Z')
385 || is_operator_name (field_name
))
386 return xstrdup (physname
);
388 is_full_physname_constructor
= is_constructor_name (physname
);
390 is_constructor
= is_full_physname_constructor
391 || (newname
&& strcmp (field_name
, newname
) == 0);
394 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
396 if (is_destructor
|| is_full_physname_constructor
)
398 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
399 strcpy (mangled_name
, physname
);
405 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
407 else if (physname
[0] == 't' || physname
[0] == 'Q')
409 /* The physname for template and qualified methods already includes
411 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
417 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
419 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
420 + strlen (buf
) + len
+ strlen (physname
) + 1);
422 mangled_name
= (char *) xmalloc (mangled_name_len
);
424 mangled_name
[0] = '\0';
426 strcpy (mangled_name
, field_name
);
428 strcat (mangled_name
, buf
);
429 /* If the class doesn't have a name, i.e. newname NULL, then we just
430 mangle it using 0 for the length of the class. Thus it gets mangled
431 as something starting with `::' rather than `classname::'. */
433 strcat (mangled_name
, newname
);
435 strcat (mangled_name
, physname
);
436 return (mangled_name
);
439 /* Initialize the cplus_specific structure. 'cplus_specific' should
440 only be allocated for use with cplus symbols. */
443 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
444 struct objfile
*objfile
)
446 /* A language_specific structure should not have been previously
448 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
449 gdb_assert (objfile
!= NULL
);
451 gsymbol
->language_specific
.cplus_specific
=
452 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
455 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
456 correctly allocated. For C++ symbols a cplus_specific struct is
457 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
458 OBJFILE can be NULL. */
461 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
463 struct objfile
*objfile
)
465 if (gsymbol
->language
== language_cplus
)
467 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
468 symbol_init_cplus_specific (gsymbol
, objfile
);
470 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
473 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
476 /* Return the demangled name of GSYMBOL. */
479 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
481 if (gsymbol
->language
== language_cplus
)
483 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
484 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
489 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
493 /* Initialize the language dependent portion of a symbol
494 depending upon the language for the symbol. */
497 symbol_set_language (struct general_symbol_info
*gsymbol
,
498 enum language language
)
500 gsymbol
->language
= language
;
501 if (gsymbol
->language
== language_d
502 || gsymbol
->language
== language_go
503 || gsymbol
->language
== language_java
504 || gsymbol
->language
== language_objc
505 || gsymbol
->language
== language_fortran
)
507 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
509 else if (gsymbol
->language
== language_cplus
)
510 gsymbol
->language_specific
.cplus_specific
= NULL
;
513 memset (&gsymbol
->language_specific
, 0,
514 sizeof (gsymbol
->language_specific
));
518 /* Functions to initialize a symbol's mangled name. */
520 /* Objects of this type are stored in the demangled name hash table. */
521 struct demangled_name_entry
527 /* Hash function for the demangled name hash. */
530 hash_demangled_name_entry (const void *data
)
532 const struct demangled_name_entry
*e
= data
;
534 return htab_hash_string (e
->mangled
);
537 /* Equality function for the demangled name hash. */
540 eq_demangled_name_entry (const void *a
, const void *b
)
542 const struct demangled_name_entry
*da
= a
;
543 const struct demangled_name_entry
*db
= b
;
545 return strcmp (da
->mangled
, db
->mangled
) == 0;
548 /* Create the hash table used for demangled names. Each hash entry is
549 a pair of strings; one for the mangled name and one for the demangled
550 name. The entry is hashed via just the mangled name. */
553 create_demangled_names_hash (struct objfile
*objfile
)
555 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
556 The hash table code will round this up to the next prime number.
557 Choosing a much larger table size wastes memory, and saves only about
558 1% in symbol reading. */
560 objfile
->demangled_names_hash
= htab_create_alloc
561 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
562 NULL
, xcalloc
, xfree
);
565 /* Try to determine the demangled name for a symbol, based on the
566 language of that symbol. If the language is set to language_auto,
567 it will attempt to find any demangling algorithm that works and
568 then set the language appropriately. The returned name is allocated
569 by the demangler and should be xfree'd. */
572 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
575 char *demangled
= NULL
;
577 if (gsymbol
->language
== language_unknown
)
578 gsymbol
->language
= language_auto
;
580 if (gsymbol
->language
== language_objc
581 || gsymbol
->language
== language_auto
)
584 objc_demangle (mangled
, 0);
585 if (demangled
!= NULL
)
587 gsymbol
->language
= language_objc
;
591 if (gsymbol
->language
== language_cplus
592 || gsymbol
->language
== language_auto
)
595 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
596 if (demangled
!= NULL
)
598 gsymbol
->language
= language_cplus
;
602 if (gsymbol
->language
== language_java
)
605 cplus_demangle (mangled
,
606 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
607 if (demangled
!= NULL
)
609 gsymbol
->language
= language_java
;
613 if (gsymbol
->language
== language_d
614 || gsymbol
->language
== language_auto
)
616 demangled
= d_demangle(mangled
, 0);
617 if (demangled
!= NULL
)
619 gsymbol
->language
= language_d
;
623 /* FIXME(dje): Continually adding languages here is clumsy.
624 Better to just call la_demangle if !auto, and if auto then call
625 a utility routine that tries successive languages in turn and reports
626 which one it finds. I realize the la_demangle options may be different
627 for different languages but there's already a FIXME for that. */
628 if (gsymbol
->language
== language_go
629 || gsymbol
->language
== language_auto
)
631 demangled
= go_demangle (mangled
, 0);
632 if (demangled
!= NULL
)
634 gsymbol
->language
= language_go
;
639 /* We could support `gsymbol->language == language_fortran' here to provide
640 module namespaces also for inferiors with only minimal symbol table (ELF
641 symbols). Just the mangling standard is not standardized across compilers
642 and there is no DW_AT_producer available for inferiors with only the ELF
643 symbols to check the mangling kind. */
647 /* Set both the mangled and demangled (if any) names for GSYMBOL based
648 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
649 objfile's obstack; but if COPY_NAME is 0 and if NAME is
650 NUL-terminated, then this function assumes that NAME is already
651 correctly saved (either permanently or with a lifetime tied to the
652 objfile), and it will not be copied.
654 The hash table corresponding to OBJFILE is used, and the memory
655 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
656 so the pointer can be discarded after calling this function. */
658 /* We have to be careful when dealing with Java names: when we run
659 into a Java minimal symbol, we don't know it's a Java symbol, so it
660 gets demangled as a C++ name. This is unfortunate, but there's not
661 much we can do about it: but when demangling partial symbols and
662 regular symbols, we'd better not reuse the wrong demangled name.
663 (See PR gdb/1039.) We solve this by putting a distinctive prefix
664 on Java names when storing them in the hash table. */
666 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
667 don't mind the Java prefix so much: different languages have
668 different demangling requirements, so it's only natural that we
669 need to keep language data around in our demangling cache. But
670 it's not good that the minimal symbol has the wrong demangled name.
671 Unfortunately, I can't think of any easy solution to that
674 #define JAVA_PREFIX "##JAVA$$"
675 #define JAVA_PREFIX_LEN 8
678 symbol_set_names (struct general_symbol_info
*gsymbol
,
679 const char *linkage_name
, int len
, int copy_name
,
680 struct objfile
*objfile
)
682 struct demangled_name_entry
**slot
;
683 /* A 0-terminated copy of the linkage name. */
684 const char *linkage_name_copy
;
685 /* A copy of the linkage name that might have a special Java prefix
686 added to it, for use when looking names up in the hash table. */
687 const char *lookup_name
;
688 /* The length of lookup_name. */
690 struct demangled_name_entry entry
;
692 if (gsymbol
->language
== language_ada
)
694 /* In Ada, we do the symbol lookups using the mangled name, so
695 we can save some space by not storing the demangled name.
697 As a side note, we have also observed some overlap between
698 the C++ mangling and Ada mangling, similarly to what has
699 been observed with Java. Because we don't store the demangled
700 name with the symbol, we don't need to use the same trick
703 gsymbol
->name
= linkage_name
;
706 char *name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
708 memcpy (name
, linkage_name
, len
);
710 gsymbol
->name
= name
;
712 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
717 if (objfile
->demangled_names_hash
== NULL
)
718 create_demangled_names_hash (objfile
);
720 /* The stabs reader generally provides names that are not
721 NUL-terminated; most of the other readers don't do this, so we
722 can just use the given copy, unless we're in the Java case. */
723 if (gsymbol
->language
== language_java
)
727 lookup_len
= len
+ JAVA_PREFIX_LEN
;
728 alloc_name
= alloca (lookup_len
+ 1);
729 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
730 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
731 alloc_name
[lookup_len
] = '\0';
733 lookup_name
= alloc_name
;
734 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
736 else if (linkage_name
[len
] != '\0')
741 alloc_name
= alloca (lookup_len
+ 1);
742 memcpy (alloc_name
, linkage_name
, len
);
743 alloc_name
[lookup_len
] = '\0';
745 lookup_name
= alloc_name
;
746 linkage_name_copy
= alloc_name
;
751 lookup_name
= linkage_name
;
752 linkage_name_copy
= linkage_name
;
755 entry
.mangled
= (char *) lookup_name
;
756 slot
= ((struct demangled_name_entry
**)
757 htab_find_slot (objfile
->demangled_names_hash
,
760 /* If this name is not in the hash table, add it. */
762 /* A C version of the symbol may have already snuck into the table.
763 This happens to, e.g., main.init (__go_init_main). Cope. */
764 || (gsymbol
->language
== language_go
765 && (*slot
)->demangled
[0] == '\0'))
767 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
769 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
771 /* Suppose we have demangled_name==NULL, copy_name==0, and
772 lookup_name==linkage_name. In this case, we already have the
773 mangled name saved, and we don't have a demangled name. So,
774 you might think we could save a little space by not recording
775 this in the hash table at all.
777 It turns out that it is actually important to still save such
778 an entry in the hash table, because storing this name gives
779 us better bcache hit rates for partial symbols. */
780 if (!copy_name
&& lookup_name
== linkage_name
)
782 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
783 offsetof (struct demangled_name_entry
,
785 + demangled_len
+ 1);
786 (*slot
)->mangled
= (char *) lookup_name
;
790 /* If we must copy the mangled name, put it directly after
791 the demangled name so we can have a single
793 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
794 offsetof (struct demangled_name_entry
,
796 + lookup_len
+ demangled_len
+ 2);
797 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
798 strcpy ((*slot
)->mangled
, lookup_name
);
801 if (demangled_name
!= NULL
)
803 strcpy ((*slot
)->demangled
, demangled_name
);
804 xfree (demangled_name
);
807 (*slot
)->demangled
[0] = '\0';
810 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
811 if ((*slot
)->demangled
[0] != '\0')
812 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
814 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
817 /* Return the source code name of a symbol. In languages where
818 demangling is necessary, this is the demangled name. */
821 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
823 switch (gsymbol
->language
)
830 case language_fortran
:
831 if (symbol_get_demangled_name (gsymbol
) != NULL
)
832 return symbol_get_demangled_name (gsymbol
);
835 if (symbol_get_demangled_name (gsymbol
) != NULL
)
836 return symbol_get_demangled_name (gsymbol
);
838 return ada_decode_symbol (gsymbol
);
843 return gsymbol
->name
;
846 /* Return the demangled name for a symbol based on the language for
847 that symbol. If no demangled name exists, return NULL. */
850 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
852 const char *dem_name
= NULL
;
854 switch (gsymbol
->language
)
861 case language_fortran
:
862 dem_name
= symbol_get_demangled_name (gsymbol
);
865 dem_name
= symbol_get_demangled_name (gsymbol
);
866 if (dem_name
== NULL
)
867 dem_name
= ada_decode_symbol (gsymbol
);
875 /* Return the search name of a symbol---generally the demangled or
876 linkage name of the symbol, depending on how it will be searched for.
877 If there is no distinct demangled name, then returns the same value
878 (same pointer) as SYMBOL_LINKAGE_NAME. */
881 symbol_search_name (const struct general_symbol_info
*gsymbol
)
883 if (gsymbol
->language
== language_ada
)
884 return gsymbol
->name
;
886 return symbol_natural_name (gsymbol
);
889 /* Initialize the structure fields to zero values. */
892 init_sal (struct symtab_and_line
*sal
)
900 sal
->explicit_pc
= 0;
901 sal
->explicit_line
= 0;
906 /* Return 1 if the two sections are the same, or if they could
907 plausibly be copies of each other, one in an original object
908 file and another in a separated debug file. */
911 matching_obj_sections (struct obj_section
*obj_first
,
912 struct obj_section
*obj_second
)
914 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
915 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
918 /* If they're the same section, then they match. */
922 /* If either is NULL, give up. */
923 if (first
== NULL
|| second
== NULL
)
926 /* This doesn't apply to absolute symbols. */
927 if (first
->owner
== NULL
|| second
->owner
== NULL
)
930 /* If they're in the same object file, they must be different sections. */
931 if (first
->owner
== second
->owner
)
934 /* Check whether the two sections are potentially corresponding. They must
935 have the same size, address, and name. We can't compare section indexes,
936 which would be more reliable, because some sections may have been
938 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
941 /* In-memory addresses may start at a different offset, relativize them. */
942 if (bfd_get_section_vma (first
->owner
, first
)
943 - bfd_get_start_address (first
->owner
)
944 != bfd_get_section_vma (second
->owner
, second
)
945 - bfd_get_start_address (second
->owner
))
948 if (bfd_get_section_name (first
->owner
, first
) == NULL
949 || bfd_get_section_name (second
->owner
, second
) == NULL
950 || strcmp (bfd_get_section_name (first
->owner
, first
),
951 bfd_get_section_name (second
->owner
, second
)) != 0)
954 /* Otherwise check that they are in corresponding objfiles. */
957 if (obj
->obfd
== first
->owner
)
959 gdb_assert (obj
!= NULL
);
961 if (obj
->separate_debug_objfile
!= NULL
962 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
964 if (obj
->separate_debug_objfile_backlink
!= NULL
965 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
972 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
974 struct objfile
*objfile
;
975 struct minimal_symbol
*msymbol
;
977 /* If we know that this is not a text address, return failure. This is
978 necessary because we loop based on texthigh and textlow, which do
979 not include the data ranges. */
980 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
982 && (MSYMBOL_TYPE (msymbol
) == mst_data
983 || MSYMBOL_TYPE (msymbol
) == mst_bss
984 || MSYMBOL_TYPE (msymbol
) == mst_abs
985 || MSYMBOL_TYPE (msymbol
) == mst_file_data
986 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
989 ALL_OBJFILES (objfile
)
991 struct symtab
*result
= NULL
;
994 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
1003 /* Debug symbols usually don't have section information. We need to dig that
1004 out of the minimal symbols and stash that in the debug symbol. */
1007 fixup_section (struct general_symbol_info
*ginfo
,
1008 CORE_ADDR addr
, struct objfile
*objfile
)
1010 struct minimal_symbol
*msym
;
1012 /* First, check whether a minimal symbol with the same name exists
1013 and points to the same address. The address check is required
1014 e.g. on PowerPC64, where the minimal symbol for a function will
1015 point to the function descriptor, while the debug symbol will
1016 point to the actual function code. */
1017 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1020 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
1021 ginfo
->section
= SYMBOL_SECTION (msym
);
1025 /* Static, function-local variables do appear in the linker
1026 (minimal) symbols, but are frequently given names that won't
1027 be found via lookup_minimal_symbol(). E.g., it has been
1028 observed in frv-uclinux (ELF) executables that a static,
1029 function-local variable named "foo" might appear in the
1030 linker symbols as "foo.6" or "foo.3". Thus, there is no
1031 point in attempting to extend the lookup-by-name mechanism to
1032 handle this case due to the fact that there can be multiple
1035 So, instead, search the section table when lookup by name has
1036 failed. The ``addr'' and ``endaddr'' fields may have already
1037 been relocated. If so, the relocation offset (i.e. the
1038 ANOFFSET value) needs to be subtracted from these values when
1039 performing the comparison. We unconditionally subtract it,
1040 because, when no relocation has been performed, the ANOFFSET
1041 value will simply be zero.
1043 The address of the symbol whose section we're fixing up HAS
1044 NOT BEEN adjusted (relocated) yet. It can't have been since
1045 the section isn't yet known and knowing the section is
1046 necessary in order to add the correct relocation value. In
1047 other words, we wouldn't even be in this function (attempting
1048 to compute the section) if it were already known.
1050 Note that it is possible to search the minimal symbols
1051 (subtracting the relocation value if necessary) to find the
1052 matching minimal symbol, but this is overkill and much less
1053 efficient. It is not necessary to find the matching minimal
1054 symbol, only its section.
1056 Note that this technique (of doing a section table search)
1057 can fail when unrelocated section addresses overlap. For
1058 this reason, we still attempt a lookup by name prior to doing
1059 a search of the section table. */
1061 struct obj_section
*s
;
1063 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1065 int idx
= s
->the_bfd_section
->index
;
1066 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1068 if (obj_section_addr (s
) - offset
<= addr
1069 && addr
< obj_section_endaddr (s
) - offset
)
1071 ginfo
->obj_section
= s
;
1072 ginfo
->section
= idx
;
1080 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1087 if (SYMBOL_OBJ_SECTION (sym
))
1090 /* We either have an OBJFILE, or we can get at it from the sym's
1091 symtab. Anything else is a bug. */
1092 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1094 if (objfile
== NULL
)
1095 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1097 /* We should have an objfile by now. */
1098 gdb_assert (objfile
);
1100 switch (SYMBOL_CLASS (sym
))
1104 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1107 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1111 /* Nothing else will be listed in the minsyms -- no use looking
1116 fixup_section (&sym
->ginfo
, addr
, objfile
);
1121 /* Compute the demangled form of NAME as used by the various symbol
1122 lookup functions. The result is stored in *RESULT_NAME. Returns a
1123 cleanup which can be used to clean up the result.
1125 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1126 Normally, Ada symbol lookups are performed using the encoded name
1127 rather than the demangled name, and so it might seem to make sense
1128 for this function to return an encoded version of NAME.
1129 Unfortunately, we cannot do this, because this function is used in
1130 circumstances where it is not appropriate to try to encode NAME.
1131 For instance, when displaying the frame info, we demangle the name
1132 of each parameter, and then perform a symbol lookup inside our
1133 function using that demangled name. In Ada, certain functions
1134 have internally-generated parameters whose name contain uppercase
1135 characters. Encoding those name would result in those uppercase
1136 characters to become lowercase, and thus cause the symbol lookup
1140 demangle_for_lookup (const char *name
, enum language lang
,
1141 const char **result_name
)
1143 char *demangled_name
= NULL
;
1144 const char *modified_name
= NULL
;
1145 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1147 modified_name
= name
;
1149 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1150 lookup, so we can always binary search. */
1151 if (lang
== language_cplus
)
1153 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1156 modified_name
= demangled_name
;
1157 make_cleanup (xfree
, demangled_name
);
1161 /* If we were given a non-mangled name, canonicalize it
1162 according to the language (so far only for C++). */
1163 demangled_name
= cp_canonicalize_string (name
);
1166 modified_name
= demangled_name
;
1167 make_cleanup (xfree
, demangled_name
);
1171 else if (lang
== language_java
)
1173 demangled_name
= cplus_demangle (name
,
1174 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1177 modified_name
= demangled_name
;
1178 make_cleanup (xfree
, demangled_name
);
1181 else if (lang
== language_d
)
1183 demangled_name
= d_demangle (name
, 0);
1186 modified_name
= demangled_name
;
1187 make_cleanup (xfree
, demangled_name
);
1190 else if (lang
== language_go
)
1192 demangled_name
= go_demangle (name
, 0);
1195 modified_name
= demangled_name
;
1196 make_cleanup (xfree
, demangled_name
);
1200 *result_name
= modified_name
;
1204 /* Find the definition for a specified symbol name NAME
1205 in domain DOMAIN, visible from lexical block BLOCK.
1206 Returns the struct symbol pointer, or zero if no symbol is found.
1207 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1208 NAME is a field of the current implied argument `this'. If so set
1209 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1210 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1211 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1213 /* This function (or rather its subordinates) have a bunch of loops and
1214 it would seem to be attractive to put in some QUIT's (though I'm not really
1215 sure whether it can run long enough to be really important). But there
1216 are a few calls for which it would appear to be bad news to quit
1217 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1218 that there is C++ code below which can error(), but that probably
1219 doesn't affect these calls since they are looking for a known
1220 variable and thus can probably assume it will never hit the C++
1224 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1225 const domain_enum domain
, enum language lang
,
1226 int *is_a_field_of_this
)
1228 const char *modified_name
;
1229 struct symbol
*returnval
;
1230 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1232 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1233 is_a_field_of_this
);
1234 do_cleanups (cleanup
);
1239 /* Behave like lookup_symbol_in_language, but performed with the
1240 current language. */
1243 lookup_symbol (const char *name
, const struct block
*block
,
1244 domain_enum domain
, int *is_a_field_of_this
)
1246 return lookup_symbol_in_language (name
, block
, domain
,
1247 current_language
->la_language
,
1248 is_a_field_of_this
);
1251 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1252 found, or NULL if not found. */
1255 lookup_language_this (const struct language_defn
*lang
,
1256 const struct block
*block
)
1258 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1265 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1268 block_found
= block
;
1271 if (BLOCK_FUNCTION (block
))
1273 block
= BLOCK_SUPERBLOCK (block
);
1279 /* Behave like lookup_symbol except that NAME is the natural name
1280 (e.g., demangled name) of the symbol that we're looking for. */
1282 static struct symbol
*
1283 lookup_symbol_aux (const char *name
, const struct block
*block
,
1284 const domain_enum domain
, enum language language
,
1285 int *is_a_field_of_this
)
1288 const struct language_defn
*langdef
;
1290 /* Make sure we do something sensible with is_a_field_of_this, since
1291 the callers that set this parameter to some non-null value will
1292 certainly use it later and expect it to be either 0 or 1.
1293 If we don't set it, the contents of is_a_field_of_this are
1295 if (is_a_field_of_this
!= NULL
)
1296 *is_a_field_of_this
= 0;
1298 /* Search specified block and its superiors. Don't search
1299 STATIC_BLOCK or GLOBAL_BLOCK. */
1301 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1305 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1306 check to see if NAME is a field of `this'. */
1308 langdef
= language_def (language
);
1310 if (is_a_field_of_this
!= NULL
)
1312 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1316 struct type
*t
= sym
->type
;
1318 /* I'm not really sure that type of this can ever
1319 be typedefed; just be safe. */
1321 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1322 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1323 t
= TYPE_TARGET_TYPE (t
);
1325 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1326 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1327 error (_("Internal error: `%s' is not an aggregate"),
1328 langdef
->la_name_of_this
);
1330 if (check_field (t
, name
))
1332 *is_a_field_of_this
= 1;
1338 /* Now do whatever is appropriate for LANGUAGE to look
1339 up static and global variables. */
1341 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1345 /* Now search all static file-level symbols. Not strictly correct,
1346 but more useful than an error. */
1348 return lookup_static_symbol_aux (name
, domain
);
1351 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1352 first, then check the psymtabs. If a psymtab indicates the existence of the
1353 desired name as a file-level static, then do psymtab-to-symtab conversion on
1354 the fly and return the found symbol. */
1357 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1359 struct objfile
*objfile
;
1362 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1366 ALL_OBJFILES (objfile
)
1368 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1376 /* Check to see if the symbol is defined in BLOCK or its superiors.
1377 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1379 static struct symbol
*
1380 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1381 const domain_enum domain
,
1382 enum language language
)
1385 const struct block
*static_block
= block_static_block (block
);
1386 const char *scope
= block_scope (block
);
1388 /* Check if either no block is specified or it's a global block. */
1390 if (static_block
== NULL
)
1393 while (block
!= static_block
)
1395 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1399 if (language
== language_cplus
|| language
== language_fortran
)
1401 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1407 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1409 block
= BLOCK_SUPERBLOCK (block
);
1412 /* We've reached the edge of the function without finding a result. */
1417 /* Look up OBJFILE to BLOCK. */
1420 lookup_objfile_from_block (const struct block
*block
)
1422 struct objfile
*obj
;
1428 block
= block_global_block (block
);
1429 /* Go through SYMTABS. */
1430 ALL_SYMTABS (obj
, s
)
1431 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1433 if (obj
->separate_debug_objfile_backlink
)
1434 obj
= obj
->separate_debug_objfile_backlink
;
1442 /* Look up a symbol in a block; if found, fixup the symbol, and set
1443 block_found appropriately. */
1446 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1447 const domain_enum domain
)
1451 sym
= lookup_block_symbol (block
, name
, domain
);
1454 block_found
= block
;
1455 return fixup_symbol_section (sym
, NULL
);
1461 /* Check all global symbols in OBJFILE in symtabs and
1465 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1467 const domain_enum domain
)
1469 const struct objfile
*objfile
;
1471 struct blockvector
*bv
;
1472 const struct block
*block
;
1475 for (objfile
= main_objfile
;
1477 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1479 /* Go through symtabs. */
1480 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1482 bv
= BLOCKVECTOR (s
);
1483 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1484 sym
= lookup_block_symbol (block
, name
, domain
);
1487 block_found
= block
;
1488 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1492 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1501 /* Check to see if the symbol is defined in one of the OBJFILE's
1502 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1503 depending on whether or not we want to search global symbols or
1506 static struct symbol
*
1507 lookup_symbol_aux_objfile (struct objfile
*objfile
, int block_index
,
1508 const char *name
, const domain_enum domain
)
1510 struct symbol
*sym
= NULL
;
1511 struct blockvector
*bv
;
1512 const struct block
*block
;
1516 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, block_index
,
1519 ALL_OBJFILE_SYMTABS (objfile
, s
)
1522 bv
= BLOCKVECTOR (s
);
1523 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1524 sym
= lookup_block_symbol (block
, name
, domain
);
1527 block_found
= block
;
1528 return fixup_symbol_section (sym
, objfile
);
1535 /* Same as lookup_symbol_aux_objfile, except that it searches all
1536 objfiles. Return the first match found. */
1538 static struct symbol
*
1539 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1540 const domain_enum domain
)
1543 struct objfile
*objfile
;
1545 ALL_OBJFILES (objfile
)
1547 sym
= lookup_symbol_aux_objfile (objfile
, block_index
, name
, domain
);
1555 /* Wrapper around lookup_symbol_aux_objfile for search_symbols.
1556 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
1557 and all related objfiles. */
1559 static struct symbol
*
1560 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
1561 const char *linkage_name
,
1564 enum language lang
= current_language
->la_language
;
1565 const char *modified_name
;
1566 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
1568 struct objfile
*main_objfile
, *cur_objfile
;
1570 if (objfile
->separate_debug_objfile_backlink
)
1571 main_objfile
= objfile
->separate_debug_objfile_backlink
;
1573 main_objfile
= objfile
;
1575 for (cur_objfile
= main_objfile
;
1577 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
1581 sym
= lookup_symbol_aux_objfile (cur_objfile
, GLOBAL_BLOCK
,
1582 modified_name
, domain
);
1584 sym
= lookup_symbol_aux_objfile (cur_objfile
, STATIC_BLOCK
,
1585 modified_name
, domain
);
1588 do_cleanups (cleanup
);
1593 do_cleanups (cleanup
);
1597 /* A helper function for lookup_symbol_aux that interfaces with the
1598 "quick" symbol table functions. */
1600 static struct symbol
*
1601 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1602 const char *name
, const domain_enum domain
)
1604 struct symtab
*symtab
;
1605 struct blockvector
*bv
;
1606 const struct block
*block
;
1611 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1615 bv
= BLOCKVECTOR (symtab
);
1616 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1617 sym
= lookup_block_symbol (block
, name
, domain
);
1620 /* This shouldn't be necessary, but as a last resort try
1621 looking in the statics even though the psymtab claimed
1622 the symbol was global, or vice-versa. It's possible
1623 that the psymtab gets it wrong in some cases. */
1625 /* FIXME: carlton/2002-09-30: Should we really do that?
1626 If that happens, isn't it likely to be a GDB error, in
1627 which case we should fix the GDB error rather than
1628 silently dealing with it here? So I'd vote for
1629 removing the check for the symbol in the other
1631 block
= BLOCKVECTOR_BLOCK (bv
,
1632 kind
== GLOBAL_BLOCK
?
1633 STATIC_BLOCK
: GLOBAL_BLOCK
);
1634 sym
= lookup_block_symbol (block
, name
, domain
);
1637 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1638 %s may be an inlined function, or may be a template function\n\
1639 (if a template, try specifying an instantiation: %s<type>)."),
1640 kind
== GLOBAL_BLOCK
? "global" : "static",
1641 name
, symtab
->filename
, name
, name
);
1643 return fixup_symbol_section (sym
, objfile
);
1646 /* A default version of lookup_symbol_nonlocal for use by languages
1647 that can't think of anything better to do. This implements the C
1651 basic_lookup_symbol_nonlocal (const char *name
,
1652 const struct block
*block
,
1653 const domain_enum domain
)
1657 /* NOTE: carlton/2003-05-19: The comments below were written when
1658 this (or what turned into this) was part of lookup_symbol_aux;
1659 I'm much less worried about these questions now, since these
1660 decisions have turned out well, but I leave these comments here
1663 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1664 not it would be appropriate to search the current global block
1665 here as well. (That's what this code used to do before the
1666 is_a_field_of_this check was moved up.) On the one hand, it's
1667 redundant with the lookup_symbol_aux_symtabs search that happens
1668 next. On the other hand, if decode_line_1 is passed an argument
1669 like filename:var, then the user presumably wants 'var' to be
1670 searched for in filename. On the third hand, there shouldn't be
1671 multiple global variables all of which are named 'var', and it's
1672 not like decode_line_1 has ever restricted its search to only
1673 global variables in a single filename. All in all, only
1674 searching the static block here seems best: it's correct and it's
1677 /* NOTE: carlton/2002-12-05: There's also a possible performance
1678 issue here: if you usually search for global symbols in the
1679 current file, then it would be slightly better to search the
1680 current global block before searching all the symtabs. But there
1681 are other factors that have a much greater effect on performance
1682 than that one, so I don't think we should worry about that for
1685 sym
= lookup_symbol_static (name
, block
, domain
);
1689 return lookup_symbol_global (name
, block
, domain
);
1692 /* Lookup a symbol in the static block associated to BLOCK, if there
1693 is one; do nothing if BLOCK is NULL or a global block. */
1696 lookup_symbol_static (const char *name
,
1697 const struct block
*block
,
1698 const domain_enum domain
)
1700 const struct block
*static_block
= block_static_block (block
);
1702 if (static_block
!= NULL
)
1703 return lookup_symbol_aux_block (name
, static_block
, domain
);
1708 /* Private data to be used with lookup_symbol_global_iterator_cb. */
1710 struct global_sym_lookup_data
1712 /* The name of the symbol we are searching for. */
1715 /* The domain to use for our search. */
1718 /* The field where the callback should store the symbol if found.
1719 It should be initialized to NULL before the search is started. */
1720 struct symbol
*result
;
1723 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
1724 It searches by name for a symbol in the GLOBAL_BLOCK of the given
1725 OBJFILE. The arguments for the search are passed via CB_DATA,
1726 which in reality is a pointer to struct global_sym_lookup_data. */
1729 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
1732 struct global_sym_lookup_data
*data
=
1733 (struct global_sym_lookup_data
*) cb_data
;
1735 gdb_assert (data
->result
== NULL
);
1737 data
->result
= lookup_symbol_aux_objfile (objfile
, GLOBAL_BLOCK
,
1738 data
->name
, data
->domain
);
1739 if (data
->result
== NULL
)
1740 data
->result
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
,
1741 data
->name
, data
->domain
);
1743 /* If we found a match, tell the iterator to stop. Otherwise,
1745 return (data
->result
!= NULL
);
1748 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1752 lookup_symbol_global (const char *name
,
1753 const struct block
*block
,
1754 const domain_enum domain
)
1756 struct symbol
*sym
= NULL
;
1757 struct objfile
*objfile
= NULL
;
1758 struct global_sym_lookup_data lookup_data
;
1760 /* Call library-specific lookup procedure. */
1761 objfile
= lookup_objfile_from_block (block
);
1762 if (objfile
!= NULL
)
1763 sym
= solib_global_lookup (objfile
, name
, domain
);
1767 memset (&lookup_data
, 0, sizeof (lookup_data
));
1768 lookup_data
.name
= name
;
1769 lookup_data
.domain
= domain
;
1770 gdbarch_iterate_over_objfiles_in_search_order
1771 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch
,
1772 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
1774 return lookup_data
.result
;
1778 symbol_matches_domain (enum language symbol_language
,
1779 domain_enum symbol_domain
,
1782 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1783 A Java class declaration also defines a typedef for the class.
1784 Similarly, any Ada type declaration implicitly defines a typedef. */
1785 if (symbol_language
== language_cplus
1786 || symbol_language
== language_d
1787 || symbol_language
== language_java
1788 || symbol_language
== language_ada
)
1790 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1791 && symbol_domain
== STRUCT_DOMAIN
)
1794 /* For all other languages, strict match is required. */
1795 return (symbol_domain
== domain
);
1798 /* Look up a type named NAME in the struct_domain. The type returned
1799 must not be opaque -- i.e., must have at least one field
1803 lookup_transparent_type (const char *name
)
1805 return current_language
->la_lookup_transparent_type (name
);
1808 /* A helper for basic_lookup_transparent_type that interfaces with the
1809 "quick" symbol table functions. */
1811 static struct type
*
1812 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1815 struct symtab
*symtab
;
1816 struct blockvector
*bv
;
1817 struct block
*block
;
1822 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1826 bv
= BLOCKVECTOR (symtab
);
1827 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1828 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1831 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1833 /* This shouldn't be necessary, but as a last resort
1834 * try looking in the 'other kind' even though the psymtab
1835 * claimed the symbol was one thing. It's possible that
1836 * the psymtab gets it wrong in some cases.
1838 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1839 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1841 /* FIXME; error is wrong in one case. */
1843 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1844 %s may be an inlined function, or may be a template function\n\
1845 (if a template, try specifying an instantiation: %s<type>)."),
1846 name
, symtab
->filename
, name
, name
);
1848 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1849 return SYMBOL_TYPE (sym
);
1854 /* The standard implementation of lookup_transparent_type. This code
1855 was modeled on lookup_symbol -- the parts not relevant to looking
1856 up types were just left out. In particular it's assumed here that
1857 types are available in struct_domain and only at file-static or
1861 basic_lookup_transparent_type (const char *name
)
1864 struct symtab
*s
= NULL
;
1865 struct blockvector
*bv
;
1866 struct objfile
*objfile
;
1867 struct block
*block
;
1870 /* Now search all the global symbols. Do the symtab's first, then
1871 check the psymtab's. If a psymtab indicates the existence
1872 of the desired name as a global, then do psymtab-to-symtab
1873 conversion on the fly and return the found symbol. */
1875 ALL_OBJFILES (objfile
)
1878 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1880 name
, STRUCT_DOMAIN
);
1882 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1884 bv
= BLOCKVECTOR (s
);
1885 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1886 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1887 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1889 return SYMBOL_TYPE (sym
);
1894 ALL_OBJFILES (objfile
)
1896 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1901 /* Now search the static file-level symbols.
1902 Not strictly correct, but more useful than an error.
1903 Do the symtab's first, then
1904 check the psymtab's. If a psymtab indicates the existence
1905 of the desired name as a file-level static, then do psymtab-to-symtab
1906 conversion on the fly and return the found symbol. */
1908 ALL_OBJFILES (objfile
)
1911 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, STATIC_BLOCK
,
1912 name
, STRUCT_DOMAIN
);
1914 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1916 bv
= BLOCKVECTOR (s
);
1917 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1918 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1919 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1921 return SYMBOL_TYPE (sym
);
1926 ALL_OBJFILES (objfile
)
1928 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1933 return (struct type
*) 0;
1936 /* Find the name of the file containing main(). */
1937 /* FIXME: What about languages without main() or specially linked
1938 executables that have no main() ? */
1941 find_main_filename (void)
1943 struct objfile
*objfile
;
1944 char *name
= main_name ();
1946 ALL_OBJFILES (objfile
)
1952 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1959 /* Search BLOCK for symbol NAME in DOMAIN.
1961 Note that if NAME is the demangled form of a C++ symbol, we will fail
1962 to find a match during the binary search of the non-encoded names, but
1963 for now we don't worry about the slight inefficiency of looking for
1964 a match we'll never find, since it will go pretty quick. Once the
1965 binary search terminates, we drop through and do a straight linear
1966 search on the symbols. Each symbol which is marked as being a ObjC/C++
1967 symbol (language_cplus or language_objc set) has both the encoded and
1968 non-encoded names tested for a match. */
1971 lookup_block_symbol (const struct block
*block
, const char *name
,
1972 const domain_enum domain
)
1974 struct block_iterator iter
;
1977 if (!BLOCK_FUNCTION (block
))
1979 for (sym
= block_iter_name_first (block
, name
, &iter
);
1981 sym
= block_iter_name_next (name
, &iter
))
1983 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1984 SYMBOL_DOMAIN (sym
), domain
))
1991 /* Note that parameter symbols do not always show up last in the
1992 list; this loop makes sure to take anything else other than
1993 parameter symbols first; it only uses parameter symbols as a
1994 last resort. Note that this only takes up extra computation
1997 struct symbol
*sym_found
= NULL
;
1999 for (sym
= block_iter_name_first (block
, name
, &iter
);
2001 sym
= block_iter_name_next (name
, &iter
))
2003 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2004 SYMBOL_DOMAIN (sym
), domain
))
2007 if (!SYMBOL_IS_ARGUMENT (sym
))
2013 return (sym_found
); /* Will be NULL if not found. */
2017 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
2020 For each symbol that matches, CALLBACK is called. The symbol and
2021 DATA are passed to the callback.
2023 If CALLBACK returns zero, the iteration ends. Otherwise, the
2024 search continues. This function iterates upward through blocks.
2025 When the outermost block has been finished, the function
2029 iterate_over_symbols (const struct block
*block
, const char *name
,
2030 const domain_enum domain
,
2031 symbol_found_callback_ftype
*callback
,
2036 struct block_iterator iter
;
2039 for (sym
= block_iter_name_first (block
, name
, &iter
);
2041 sym
= block_iter_name_next (name
, &iter
))
2043 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2044 SYMBOL_DOMAIN (sym
), domain
))
2046 if (!callback (sym
, data
))
2051 block
= BLOCK_SUPERBLOCK (block
);
2055 /* Find the symtab associated with PC and SECTION. Look through the
2056 psymtabs and read in another symtab if necessary. */
2059 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2062 struct blockvector
*bv
;
2063 struct symtab
*s
= NULL
;
2064 struct symtab
*best_s
= NULL
;
2065 struct objfile
*objfile
;
2066 struct program_space
*pspace
;
2067 CORE_ADDR distance
= 0;
2068 struct minimal_symbol
*msymbol
;
2070 pspace
= current_program_space
;
2072 /* If we know that this is not a text address, return failure. This is
2073 necessary because we loop based on the block's high and low code
2074 addresses, which do not include the data ranges, and because
2075 we call find_pc_sect_psymtab which has a similar restriction based
2076 on the partial_symtab's texthigh and textlow. */
2077 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2079 && (MSYMBOL_TYPE (msymbol
) == mst_data
2080 || MSYMBOL_TYPE (msymbol
) == mst_bss
2081 || MSYMBOL_TYPE (msymbol
) == mst_abs
2082 || MSYMBOL_TYPE (msymbol
) == mst_file_data
2083 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
2086 /* Search all symtabs for the one whose file contains our address, and which
2087 is the smallest of all the ones containing the address. This is designed
2088 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2089 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2090 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2092 This happens for native ecoff format, where code from included files
2093 gets its own symtab. The symtab for the included file should have
2094 been read in already via the dependency mechanism.
2095 It might be swifter to create several symtabs with the same name
2096 like xcoff does (I'm not sure).
2098 It also happens for objfiles that have their functions reordered.
2099 For these, the symtab we are looking for is not necessarily read in. */
2101 ALL_PRIMARY_SYMTABS (objfile
, s
)
2103 bv
= BLOCKVECTOR (s
);
2104 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2106 if (BLOCK_START (b
) <= pc
2107 && BLOCK_END (b
) > pc
2109 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2111 /* For an objfile that has its functions reordered,
2112 find_pc_psymtab will find the proper partial symbol table
2113 and we simply return its corresponding symtab. */
2114 /* In order to better support objfiles that contain both
2115 stabs and coff debugging info, we continue on if a psymtab
2117 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2119 struct symtab
*result
;
2122 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2131 struct block_iterator iter
;
2132 struct symbol
*sym
= NULL
;
2134 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2136 fixup_symbol_section (sym
, objfile
);
2137 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
2141 continue; /* No symbol in this symtab matches
2144 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2152 ALL_OBJFILES (objfile
)
2154 struct symtab
*result
;
2158 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2169 /* Find the symtab associated with PC. Look through the psymtabs and read
2170 in another symtab if necessary. Backward compatibility, no section. */
2173 find_pc_symtab (CORE_ADDR pc
)
2175 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2179 /* Find the source file and line number for a given PC value and SECTION.
2180 Return a structure containing a symtab pointer, a line number,
2181 and a pc range for the entire source line.
2182 The value's .pc field is NOT the specified pc.
2183 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2184 use the line that ends there. Otherwise, in that case, the line
2185 that begins there is used. */
2187 /* The big complication here is that a line may start in one file, and end just
2188 before the start of another file. This usually occurs when you #include
2189 code in the middle of a subroutine. To properly find the end of a line's PC
2190 range, we must search all symtabs associated with this compilation unit, and
2191 find the one whose first PC is closer than that of the next line in this
2194 /* If it's worth the effort, we could be using a binary search. */
2196 struct symtab_and_line
2197 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2200 struct linetable
*l
;
2203 struct linetable_entry
*item
;
2204 struct symtab_and_line val
;
2205 struct blockvector
*bv
;
2206 struct minimal_symbol
*msymbol
;
2207 struct minimal_symbol
*mfunsym
;
2208 struct objfile
*objfile
;
2210 /* Info on best line seen so far, and where it starts, and its file. */
2212 struct linetable_entry
*best
= NULL
;
2213 CORE_ADDR best_end
= 0;
2214 struct symtab
*best_symtab
= 0;
2216 /* Store here the first line number
2217 of a file which contains the line at the smallest pc after PC.
2218 If we don't find a line whose range contains PC,
2219 we will use a line one less than this,
2220 with a range from the start of that file to the first line's pc. */
2221 struct linetable_entry
*alt
= NULL
;
2222 struct symtab
*alt_symtab
= 0;
2224 /* Info on best line seen in this file. */
2226 struct linetable_entry
*prev
;
2228 /* If this pc is not from the current frame,
2229 it is the address of the end of a call instruction.
2230 Quite likely that is the start of the following statement.
2231 But what we want is the statement containing the instruction.
2232 Fudge the pc to make sure we get that. */
2234 init_sal (&val
); /* initialize to zeroes */
2236 val
.pspace
= current_program_space
;
2238 /* It's tempting to assume that, if we can't find debugging info for
2239 any function enclosing PC, that we shouldn't search for line
2240 number info, either. However, GAS can emit line number info for
2241 assembly files --- very helpful when debugging hand-written
2242 assembly code. In such a case, we'd have no debug info for the
2243 function, but we would have line info. */
2248 /* elz: added this because this function returned the wrong
2249 information if the pc belongs to a stub (import/export)
2250 to call a shlib function. This stub would be anywhere between
2251 two functions in the target, and the line info was erroneously
2252 taken to be the one of the line before the pc. */
2254 /* RT: Further explanation:
2256 * We have stubs (trampolines) inserted between procedures.
2258 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2259 * exists in the main image.
2261 * In the minimal symbol table, we have a bunch of symbols
2262 * sorted by start address. The stubs are marked as "trampoline",
2263 * the others appear as text. E.g.:
2265 * Minimal symbol table for main image
2266 * main: code for main (text symbol)
2267 * shr1: stub (trampoline symbol)
2268 * foo: code for foo (text symbol)
2270 * Minimal symbol table for "shr1" image:
2272 * shr1: code for shr1 (text symbol)
2275 * So the code below is trying to detect if we are in the stub
2276 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2277 * and if found, do the symbolization from the real-code address
2278 * rather than the stub address.
2280 * Assumptions being made about the minimal symbol table:
2281 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2282 * if we're really in the trampoline.s If we're beyond it (say
2283 * we're in "foo" in the above example), it'll have a closer
2284 * symbol (the "foo" text symbol for example) and will not
2285 * return the trampoline.
2286 * 2. lookup_minimal_symbol_text() will find a real text symbol
2287 * corresponding to the trampoline, and whose address will
2288 * be different than the trampoline address. I put in a sanity
2289 * check for the address being the same, to avoid an
2290 * infinite recursion.
2292 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2293 if (msymbol
!= NULL
)
2294 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2296 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2298 if (mfunsym
== NULL
)
2299 /* I eliminated this warning since it is coming out
2300 * in the following situation:
2301 * gdb shmain // test program with shared libraries
2302 * (gdb) break shr1 // function in shared lib
2303 * Warning: In stub for ...
2304 * In the above situation, the shared lib is not loaded yet,
2305 * so of course we can't find the real func/line info,
2306 * but the "break" still works, and the warning is annoying.
2307 * So I commented out the warning. RT */
2308 /* warning ("In stub for %s; unable to find real function/line info",
2309 SYMBOL_LINKAGE_NAME (msymbol)); */
2312 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
2313 == SYMBOL_VALUE_ADDRESS (msymbol
))
2314 /* Avoid infinite recursion */
2315 /* See above comment about why warning is commented out. */
2316 /* warning ("In stub for %s; unable to find real function/line info",
2317 SYMBOL_LINKAGE_NAME (msymbol)); */
2321 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2325 s
= find_pc_sect_symtab (pc
, section
);
2328 /* If no symbol information, return previous pc. */
2335 bv
= BLOCKVECTOR (s
);
2336 objfile
= s
->objfile
;
2338 /* Look at all the symtabs that share this blockvector.
2339 They all have the same apriori range, that we found was right;
2340 but they have different line tables. */
2342 ALL_OBJFILE_SYMTABS (objfile
, s
)
2344 if (BLOCKVECTOR (s
) != bv
)
2347 /* Find the best line in this symtab. */
2354 /* I think len can be zero if the symtab lacks line numbers
2355 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2356 I'm not sure which, and maybe it depends on the symbol
2362 item
= l
->item
; /* Get first line info. */
2364 /* Is this file's first line closer than the first lines of other files?
2365 If so, record this file, and its first line, as best alternate. */
2366 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2372 for (i
= 0; i
< len
; i
++, item
++)
2374 /* Leave prev pointing to the linetable entry for the last line
2375 that started at or before PC. */
2382 /* At this point, prev points at the line whose start addr is <= pc, and
2383 item points at the next line. If we ran off the end of the linetable
2384 (pc >= start of the last line), then prev == item. If pc < start of
2385 the first line, prev will not be set. */
2387 /* Is this file's best line closer than the best in the other files?
2388 If so, record this file, and its best line, as best so far. Don't
2389 save prev if it represents the end of a function (i.e. line number
2390 0) instead of a real line. */
2392 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2397 /* Discard BEST_END if it's before the PC of the current BEST. */
2398 if (best_end
<= best
->pc
)
2402 /* If another line (denoted by ITEM) is in the linetable and its
2403 PC is after BEST's PC, but before the current BEST_END, then
2404 use ITEM's PC as the new best_end. */
2405 if (best
&& i
< len
&& item
->pc
> best
->pc
2406 && (best_end
== 0 || best_end
> item
->pc
))
2407 best_end
= item
->pc
;
2412 /* If we didn't find any line number info, just return zeros.
2413 We used to return alt->line - 1 here, but that could be
2414 anywhere; if we don't have line number info for this PC,
2415 don't make some up. */
2418 else if (best
->line
== 0)
2420 /* If our best fit is in a range of PC's for which no line
2421 number info is available (line number is zero) then we didn't
2422 find any valid line information. */
2427 val
.symtab
= best_symtab
;
2428 val
.line
= best
->line
;
2430 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2435 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2437 val
.section
= section
;
2441 /* Backward compatibility (no section). */
2443 struct symtab_and_line
2444 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2446 struct obj_section
*section
;
2448 section
= find_pc_overlay (pc
);
2449 if (pc_in_unmapped_range (pc
, section
))
2450 pc
= overlay_mapped_address (pc
, section
);
2451 return find_pc_sect_line (pc
, section
, notcurrent
);
2454 /* Find line number LINE in any symtab whose name is the same as
2457 If found, return the symtab that contains the linetable in which it was
2458 found, set *INDEX to the index in the linetable of the best entry
2459 found, and set *EXACT_MATCH nonzero if the value returned is an
2462 If not found, return NULL. */
2465 find_line_symtab (struct symtab
*symtab
, int line
,
2466 int *index
, int *exact_match
)
2468 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2470 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2474 struct linetable
*best_linetable
;
2475 struct symtab
*best_symtab
;
2477 /* First try looking it up in the given symtab. */
2478 best_linetable
= LINETABLE (symtab
);
2479 best_symtab
= symtab
;
2480 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
2481 if (best_index
< 0 || !exact
)
2483 /* Didn't find an exact match. So we better keep looking for
2484 another symtab with the same name. In the case of xcoff,
2485 multiple csects for one source file (produced by IBM's FORTRAN
2486 compiler) produce multiple symtabs (this is unavoidable
2487 assuming csects can be at arbitrary places in memory and that
2488 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2490 /* BEST is the smallest linenumber > LINE so far seen,
2491 or 0 if none has been seen so far.
2492 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2495 struct objfile
*objfile
;
2498 if (best_index
>= 0)
2499 best
= best_linetable
->item
[best_index
].line
;
2503 ALL_OBJFILES (objfile
)
2506 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2510 /* Get symbol full file name if possible. */
2511 symtab_to_fullname (symtab
);
2513 ALL_SYMTABS (objfile
, s
)
2515 struct linetable
*l
;
2518 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2520 if (symtab
->fullname
!= NULL
2521 && symtab_to_fullname (s
) != NULL
2522 && FILENAME_CMP (symtab
->fullname
, s
->fullname
) != 0)
2525 ind
= find_line_common (l
, line
, &exact
, 0);
2535 if (best
== 0 || l
->item
[ind
].line
< best
)
2537 best
= l
->item
[ind
].line
;
2550 *index
= best_index
;
2552 *exact_match
= exact
;
2557 /* Given SYMTAB, returns all the PCs function in the symtab that
2558 exactly match LINE. Returns NULL if there are no exact matches,
2559 but updates BEST_ITEM in this case. */
2562 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
2563 struct linetable_entry
**best_item
)
2566 struct symbol
*previous_function
= NULL
;
2567 VEC (CORE_ADDR
) *result
= NULL
;
2569 /* First, collect all the PCs that are at this line. */
2575 idx
= find_line_common (LINETABLE (symtab
), line
, &was_exact
, start
);
2581 struct linetable_entry
*item
= &LINETABLE (symtab
)->item
[idx
];
2583 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
2589 VEC_safe_push (CORE_ADDR
, result
, LINETABLE (symtab
)->item
[idx
].pc
);
2597 /* Set the PC value for a given source file and line number and return true.
2598 Returns zero for invalid line number (and sets the PC to 0).
2599 The source file is specified with a struct symtab. */
2602 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2604 struct linetable
*l
;
2611 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2614 l
= LINETABLE (symtab
);
2615 *pc
= l
->item
[ind
].pc
;
2622 /* Find the range of pc values in a line.
2623 Store the starting pc of the line into *STARTPTR
2624 and the ending pc (start of next line) into *ENDPTR.
2625 Returns 1 to indicate success.
2626 Returns 0 if could not find the specified line. */
2629 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2632 CORE_ADDR startaddr
;
2633 struct symtab_and_line found_sal
;
2636 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2639 /* This whole function is based on address. For example, if line 10 has
2640 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2641 "info line *0x123" should say the line goes from 0x100 to 0x200
2642 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2643 This also insures that we never give a range like "starts at 0x134
2644 and ends at 0x12c". */
2646 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2647 if (found_sal
.line
!= sal
.line
)
2649 /* The specified line (sal) has zero bytes. */
2650 *startptr
= found_sal
.pc
;
2651 *endptr
= found_sal
.pc
;
2655 *startptr
= found_sal
.pc
;
2656 *endptr
= found_sal
.end
;
2661 /* Given a line table and a line number, return the index into the line
2662 table for the pc of the nearest line whose number is >= the specified one.
2663 Return -1 if none is found. The value is >= 0 if it is an index.
2664 START is the index at which to start searching the line table.
2666 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2669 find_line_common (struct linetable
*l
, int lineno
,
2670 int *exact_match
, int start
)
2675 /* BEST is the smallest linenumber > LINENO so far seen,
2676 or 0 if none has been seen so far.
2677 BEST_INDEX identifies the item for it. */
2679 int best_index
= -1;
2690 for (i
= start
; i
< len
; i
++)
2692 struct linetable_entry
*item
= &(l
->item
[i
]);
2694 if (item
->line
== lineno
)
2696 /* Return the first (lowest address) entry which matches. */
2701 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2708 /* If we got here, we didn't get an exact match. */
2713 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2715 struct symtab_and_line sal
;
2717 sal
= find_pc_line (pc
, 0);
2720 return sal
.symtab
!= 0;
2723 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2724 address for that function that has an entry in SYMTAB's line info
2725 table. If such an entry cannot be found, return FUNC_ADDR
2729 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2731 CORE_ADDR func_start
, func_end
;
2732 struct linetable
*l
;
2735 /* Give up if this symbol has no lineinfo table. */
2736 l
= LINETABLE (symtab
);
2740 /* Get the range for the function's PC values, or give up if we
2741 cannot, for some reason. */
2742 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2745 /* Linetable entries are ordered by PC values, see the commentary in
2746 symtab.h where `struct linetable' is defined. Thus, the first
2747 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2748 address we are looking for. */
2749 for (i
= 0; i
< l
->nitems
; i
++)
2751 struct linetable_entry
*item
= &(l
->item
[i
]);
2753 /* Don't use line numbers of zero, they mark special entries in
2754 the table. See the commentary on symtab.h before the
2755 definition of struct linetable. */
2756 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2763 /* Given a function symbol SYM, find the symtab and line for the start
2765 If the argument FUNFIRSTLINE is nonzero, we want the first line
2766 of real code inside the function. */
2768 struct symtab_and_line
2769 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2771 struct symtab_and_line sal
;
2773 fixup_symbol_section (sym
, NULL
);
2774 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2775 SYMBOL_OBJ_SECTION (sym
), 0);
2777 /* We always should have a line for the function start address.
2778 If we don't, something is odd. Create a plain SAL refering
2779 just the PC and hope that skip_prologue_sal (if requested)
2780 can find a line number for after the prologue. */
2781 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2784 sal
.pspace
= current_program_space
;
2785 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2786 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2790 skip_prologue_sal (&sal
);
2795 /* Adjust SAL to the first instruction past the function prologue.
2796 If the PC was explicitly specified, the SAL is not changed.
2797 If the line number was explicitly specified, at most the SAL's PC
2798 is updated. If SAL is already past the prologue, then do nothing. */
2801 skip_prologue_sal (struct symtab_and_line
*sal
)
2804 struct symtab_and_line start_sal
;
2805 struct cleanup
*old_chain
;
2806 CORE_ADDR pc
, saved_pc
;
2807 struct obj_section
*section
;
2809 struct objfile
*objfile
;
2810 struct gdbarch
*gdbarch
;
2811 struct block
*b
, *function_block
;
2812 int force_skip
, skip
;
2814 /* Do not change the SAL is PC was specified explicitly. */
2815 if (sal
->explicit_pc
)
2818 old_chain
= save_current_space_and_thread ();
2819 switch_to_program_space_and_thread (sal
->pspace
);
2821 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2824 fixup_symbol_section (sym
, NULL
);
2826 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2827 section
= SYMBOL_OBJ_SECTION (sym
);
2828 name
= SYMBOL_LINKAGE_NAME (sym
);
2829 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2833 struct minimal_symbol
*msymbol
2834 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2836 if (msymbol
== NULL
)
2838 do_cleanups (old_chain
);
2842 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2843 section
= SYMBOL_OBJ_SECTION (msymbol
);
2844 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2845 objfile
= msymbol_objfile (msymbol
);
2848 gdbarch
= get_objfile_arch (objfile
);
2850 /* Process the prologue in two passes. In the first pass try to skip the
2851 prologue (SKIP is true) and verify there is a real need for it (indicated
2852 by FORCE_SKIP). If no such reason was found run a second pass where the
2853 prologue is not skipped (SKIP is false). */
2858 /* Be conservative - allow direct PC (without skipping prologue) only if we
2859 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2860 have to be set by the caller so we use SYM instead. */
2861 if (sym
&& SYMBOL_SYMTAB (sym
)->locations_valid
)
2869 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2870 so that gdbarch_skip_prologue has something unique to work on. */
2871 if (section_is_overlay (section
) && !section_is_mapped (section
))
2872 pc
= overlay_unmapped_address (pc
, section
);
2874 /* Skip "first line" of function (which is actually its prologue). */
2875 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2877 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2879 /* For overlays, map pc back into its mapped VMA range. */
2880 pc
= overlay_mapped_address (pc
, section
);
2882 /* Calculate line number. */
2883 start_sal
= find_pc_sect_line (pc
, section
, 0);
2885 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2886 line is still part of the same function. */
2887 if (skip
&& start_sal
.pc
!= pc
2888 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2889 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2890 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2891 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2893 /* First pc of next line */
2895 /* Recalculate the line number (might not be N+1). */
2896 start_sal
= find_pc_sect_line (pc
, section
, 0);
2899 /* On targets with executable formats that don't have a concept of
2900 constructors (ELF with .init has, PE doesn't), gcc emits a call
2901 to `__main' in `main' between the prologue and before user
2903 if (gdbarch_skip_main_prologue_p (gdbarch
)
2904 && name
&& strcmp_iw (name
, "main") == 0)
2906 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2907 /* Recalculate the line number (might not be N+1). */
2908 start_sal
= find_pc_sect_line (pc
, section
, 0);
2912 while (!force_skip
&& skip
--);
2914 /* If we still don't have a valid source line, try to find the first
2915 PC in the lineinfo table that belongs to the same function. This
2916 happens with COFF debug info, which does not seem to have an
2917 entry in lineinfo table for the code after the prologue which has
2918 no direct relation to source. For example, this was found to be
2919 the case with the DJGPP target using "gcc -gcoff" when the
2920 compiler inserted code after the prologue to make sure the stack
2922 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
2924 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2925 /* Recalculate the line number. */
2926 start_sal
= find_pc_sect_line (pc
, section
, 0);
2929 do_cleanups (old_chain
);
2931 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2932 forward SAL to the end of the prologue. */
2937 sal
->section
= section
;
2939 /* Unless the explicit_line flag was set, update the SAL line
2940 and symtab to correspond to the modified PC location. */
2941 if (sal
->explicit_line
)
2944 sal
->symtab
= start_sal
.symtab
;
2945 sal
->line
= start_sal
.line
;
2946 sal
->end
= start_sal
.end
;
2948 /* Check if we are now inside an inlined function. If we can,
2949 use the call site of the function instead. */
2950 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2951 function_block
= NULL
;
2954 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2956 else if (BLOCK_FUNCTION (b
) != NULL
)
2958 b
= BLOCK_SUPERBLOCK (b
);
2960 if (function_block
!= NULL
2961 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2963 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2964 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2968 /* If P is of the form "operator[ \t]+..." where `...' is
2969 some legitimate operator text, return a pointer to the
2970 beginning of the substring of the operator text.
2971 Otherwise, return "". */
2974 operator_chars (char *p
, char **end
)
2977 if (strncmp (p
, "operator", 8))
2981 /* Don't get faked out by `operator' being part of a longer
2983 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2986 /* Allow some whitespace between `operator' and the operator symbol. */
2987 while (*p
== ' ' || *p
== '\t')
2990 /* Recognize 'operator TYPENAME'. */
2992 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2996 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3005 case '\\': /* regexp quoting */
3008 if (p
[2] == '=') /* 'operator\*=' */
3010 else /* 'operator\*' */
3014 else if (p
[1] == '[')
3017 error (_("mismatched quoting on brackets, "
3018 "try 'operator\\[\\]'"));
3019 else if (p
[2] == '\\' && p
[3] == ']')
3021 *end
= p
+ 4; /* 'operator\[\]' */
3025 error (_("nothing is allowed between '[' and ']'"));
3029 /* Gratuitous qoute: skip it and move on. */
3051 if (p
[0] == '-' && p
[1] == '>')
3053 /* Struct pointer member operator 'operator->'. */
3056 *end
= p
+ 3; /* 'operator->*' */
3059 else if (p
[2] == '\\')
3061 *end
= p
+ 4; /* Hopefully 'operator->\*' */
3066 *end
= p
+ 2; /* 'operator->' */
3070 if (p
[1] == '=' || p
[1] == p
[0])
3081 error (_("`operator ()' must be specified "
3082 "without whitespace in `()'"));
3087 error (_("`operator ?:' must be specified "
3088 "without whitespace in `?:'"));
3093 error (_("`operator []' must be specified "
3094 "without whitespace in `[]'"));
3098 error (_("`operator %s' not supported"), p
);
3107 /* If FILE is not already in the table of files, return zero;
3108 otherwise return non-zero. Optionally add FILE to the table if ADD
3109 is non-zero. If *FIRST is non-zero, forget the old table
3113 filename_seen (const char *file
, int add
, int *first
)
3115 /* Table of files seen so far. */
3116 static const char **tab
= NULL
;
3117 /* Allocated size of tab in elements.
3118 Start with one 256-byte block (when using GNU malloc.c).
3119 24 is the malloc overhead when range checking is in effect. */
3120 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
3121 /* Current size of tab in elements. */
3122 static int tab_cur_size
;
3128 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
3132 /* Is FILE in tab? */
3133 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
3134 if (filename_cmp (*p
, file
) == 0)
3137 /* No; maybe add it to tab. */
3140 if (tab_cur_size
== tab_alloc_size
)
3142 tab_alloc_size
*= 2;
3143 tab
= (const char **) xrealloc ((char *) tab
,
3144 tab_alloc_size
* sizeof (*tab
));
3146 tab
[tab_cur_size
++] = file
;
3152 /* Slave routine for sources_info. Force line breaks at ,'s.
3153 NAME is the name to print and *FIRST is nonzero if this is the first
3154 name printed. Set *FIRST to zero. */
3157 output_source_filename (const char *name
, int *first
)
3159 /* Since a single source file can result in several partial symbol
3160 tables, we need to avoid printing it more than once. Note: if
3161 some of the psymtabs are read in and some are not, it gets
3162 printed both under "Source files for which symbols have been
3163 read" and "Source files for which symbols will be read in on
3164 demand". I consider this a reasonable way to deal with the
3165 situation. I'm not sure whether this can also happen for
3166 symtabs; it doesn't hurt to check. */
3168 /* Was NAME already seen? */
3169 if (filename_seen (name
, 1, first
))
3171 /* Yes; don't print it again. */
3174 /* No; print it and reset *FIRST. */
3181 printf_filtered (", ");
3185 fputs_filtered (name
, gdb_stdout
);
3188 /* A callback for map_partial_symbol_filenames. */
3191 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3194 output_source_filename (fullname
? fullname
: filename
, data
);
3198 sources_info (char *ignore
, int from_tty
)
3201 struct objfile
*objfile
;
3204 if (!have_full_symbols () && !have_partial_symbols ())
3206 error (_("No symbol table is loaded. Use the \"file\" command."));
3209 printf_filtered ("Source files for which symbols have been read in:\n\n");
3212 ALL_SYMTABS (objfile
, s
)
3214 const char *fullname
= symtab_to_fullname (s
);
3216 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
3218 printf_filtered ("\n\n");
3220 printf_filtered ("Source files for which symbols "
3221 "will be read in on demand:\n\n");
3224 map_partial_symbol_filenames (output_partial_symbol_filename
, &first
,
3225 1 /*need_fullname*/);
3226 printf_filtered ("\n");
3230 file_matches (const char *file
, char *files
[], int nfiles
)
3234 if (file
!= NULL
&& nfiles
!= 0)
3236 for (i
= 0; i
< nfiles
; i
++)
3238 if (filename_cmp (files
[i
], lbasename (file
)) == 0)
3242 else if (nfiles
== 0)
3247 /* Free any memory associated with a search. */
3250 free_search_symbols (struct symbol_search
*symbols
)
3252 struct symbol_search
*p
;
3253 struct symbol_search
*next
;
3255 for (p
= symbols
; p
!= NULL
; p
= next
)
3263 do_free_search_symbols_cleanup (void *symbols
)
3265 free_search_symbols (symbols
);
3269 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
3271 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
3274 /* Helper function for sort_search_symbols and qsort. Can only
3275 sort symbols, not minimal symbols. */
3278 compare_search_syms (const void *sa
, const void *sb
)
3280 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
3281 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
3283 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
3284 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3287 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3288 prevtail where it is, but update its next pointer to point to
3289 the first of the sorted symbols. */
3291 static struct symbol_search
*
3292 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3294 struct symbol_search
**symbols
, *symp
, *old_next
;
3297 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3299 symp
= prevtail
->next
;
3300 for (i
= 0; i
< nfound
; i
++)
3305 /* Generally NULL. */
3308 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3309 compare_search_syms
);
3312 for (i
= 0; i
< nfound
; i
++)
3314 symp
->next
= symbols
[i
];
3317 symp
->next
= old_next
;
3323 /* An object of this type is passed as the user_data to the
3324 expand_symtabs_matching method. */
3325 struct search_symbols_data
3330 /* It is true if PREG contains valid data, false otherwise. */
3331 unsigned preg_p
: 1;
3335 /* A callback for expand_symtabs_matching. */
3338 search_symbols_file_matches (const char *filename
, void *user_data
)
3340 struct search_symbols_data
*data
= user_data
;
3342 return file_matches (filename
, data
->files
, data
->nfiles
);
3345 /* A callback for expand_symtabs_matching. */
3348 search_symbols_name_matches (const char *symname
, void *user_data
)
3350 struct search_symbols_data
*data
= user_data
;
3352 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3355 /* Search the symbol table for matches to the regular expression REGEXP,
3356 returning the results in *MATCHES.
3358 Only symbols of KIND are searched:
3359 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3360 and constants (enums)
3361 FUNCTIONS_DOMAIN - search all functions
3362 TYPES_DOMAIN - search all type names
3363 ALL_DOMAIN - an internal error for this function
3365 free_search_symbols should be called when *MATCHES is no longer needed.
3367 The results are sorted locally; each symtab's global and static blocks are
3368 separately alphabetized. */
3371 search_symbols (char *regexp
, enum search_domain kind
,
3372 int nfiles
, char *files
[],
3373 struct symbol_search
**matches
)
3376 struct blockvector
*bv
;
3379 struct block_iterator iter
;
3381 struct objfile
*objfile
;
3382 struct minimal_symbol
*msymbol
;
3384 static const enum minimal_symbol_type types
[]
3385 = {mst_data
, mst_text
, mst_abs
};
3386 static const enum minimal_symbol_type types2
[]
3387 = {mst_bss
, mst_file_text
, mst_abs
};
3388 static const enum minimal_symbol_type types3
[]
3389 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3390 static const enum minimal_symbol_type types4
[]
3391 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3392 enum minimal_symbol_type ourtype
;
3393 enum minimal_symbol_type ourtype2
;
3394 enum minimal_symbol_type ourtype3
;
3395 enum minimal_symbol_type ourtype4
;
3396 struct symbol_search
*sr
;
3397 struct symbol_search
*psr
;
3398 struct symbol_search
*tail
;
3399 struct search_symbols_data datum
;
3401 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3402 CLEANUP_CHAIN is freed only in the case of an error. */
3403 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3404 struct cleanup
*retval_chain
;
3406 gdb_assert (kind
<= TYPES_DOMAIN
);
3408 ourtype
= types
[kind
];
3409 ourtype2
= types2
[kind
];
3410 ourtype3
= types3
[kind
];
3411 ourtype4
= types4
[kind
];
3413 sr
= *matches
= NULL
;
3419 /* Make sure spacing is right for C++ operators.
3420 This is just a courtesy to make the matching less sensitive
3421 to how many spaces the user leaves between 'operator'
3422 and <TYPENAME> or <OPERATOR>. */
3424 char *opname
= operator_chars (regexp
, &opend
);
3429 int fix
= -1; /* -1 means ok; otherwise number of
3432 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3434 /* There should 1 space between 'operator' and 'TYPENAME'. */
3435 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3440 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3441 if (opname
[-1] == ' ')
3444 /* If wrong number of spaces, fix it. */
3447 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3449 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3454 errcode
= regcomp (&datum
.preg
, regexp
,
3455 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3459 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3461 make_cleanup (xfree
, err
);
3462 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3465 make_regfree_cleanup (&datum
.preg
);
3468 /* Search through the partial symtabs *first* for all symbols
3469 matching the regexp. That way we don't have to reproduce all of
3470 the machinery below. */
3472 datum
.nfiles
= nfiles
;
3473 datum
.files
= files
;
3474 ALL_OBJFILES (objfile
)
3477 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3480 : search_symbols_file_matches
),
3481 search_symbols_name_matches
,
3486 retval_chain
= old_chain
;
3488 /* Here, we search through the minimal symbol tables for functions
3489 and variables that match, and force their symbols to be read.
3490 This is in particular necessary for demangled variable names,
3491 which are no longer put into the partial symbol tables.
3492 The symbol will then be found during the scan of symtabs below.
3494 For functions, find_pc_symtab should succeed if we have debug info
3495 for the function, for variables we have to call
3496 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3498 If the lookup fails, set found_misc so that we will rescan to print
3499 any matching symbols without debug info.
3500 We only search the objfile the msymbol came from, we no longer search
3501 all objfiles. In large programs (1000s of shared libs) searching all
3502 objfiles is not worth the pain. */
3504 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3506 ALL_MSYMBOLS (objfile
, msymbol
)
3510 if (msymbol
->created_by_gdb
)
3513 if (MSYMBOL_TYPE (msymbol
) == ourtype
3514 || MSYMBOL_TYPE (msymbol
) == ourtype2
3515 || MSYMBOL_TYPE (msymbol
) == ourtype3
3516 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3519 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3522 /* Note: An important side-effect of these lookup functions
3523 is to expand the symbol table if msymbol is found, for the
3524 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3525 if (kind
== FUNCTIONS_DOMAIN
3526 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
3527 : (lookup_symbol_in_objfile_from_linkage_name
3528 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3536 ALL_PRIMARY_SYMTABS (objfile
, s
)
3538 bv
= BLOCKVECTOR (s
);
3539 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3541 struct symbol_search
*prevtail
= tail
;
3544 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3545 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3547 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3551 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3553 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3555 && ((kind
== VARIABLES_DOMAIN
3556 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3557 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3558 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3559 /* LOC_CONST can be used for more than just enums,
3560 e.g., c++ static const members.
3561 We only want to skip enums here. */
3562 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3563 && TYPE_CODE (SYMBOL_TYPE (sym
))
3565 || (kind
== FUNCTIONS_DOMAIN
3566 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3567 || (kind
== TYPES_DOMAIN
3568 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3571 psr
= (struct symbol_search
*)
3572 xmalloc (sizeof (struct symbol_search
));
3574 psr
->symtab
= real_symtab
;
3576 psr
->msymbol
= NULL
;
3588 if (prevtail
== NULL
)
3590 struct symbol_search dummy
;
3593 tail
= sort_search_symbols (&dummy
, nfound
);
3596 make_cleanup_free_search_symbols (sr
);
3599 tail
= sort_search_symbols (prevtail
, nfound
);
3604 /* If there are no eyes, avoid all contact. I mean, if there are
3605 no debug symbols, then print directly from the msymbol_vector. */
3607 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
3609 ALL_MSYMBOLS (objfile
, msymbol
)
3613 if (msymbol
->created_by_gdb
)
3616 if (MSYMBOL_TYPE (msymbol
) == ourtype
3617 || MSYMBOL_TYPE (msymbol
) == ourtype2
3618 || MSYMBOL_TYPE (msymbol
) == ourtype3
3619 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3622 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3625 /* For functions we can do a quick check of whether the
3626 symbol might be found via find_pc_symtab. */
3627 if (kind
!= FUNCTIONS_DOMAIN
3628 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
)
3630 if (lookup_symbol_in_objfile_from_linkage_name
3631 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3635 psr
= (struct symbol_search
*)
3636 xmalloc (sizeof (struct symbol_search
));
3638 psr
->msymbol
= msymbol
;
3645 make_cleanup_free_search_symbols (sr
);
3657 discard_cleanups (retval_chain
);
3658 do_cleanups (old_chain
);
3662 /* Helper function for symtab_symbol_info, this function uses
3663 the data returned from search_symbols() to print information
3664 regarding the match to gdb_stdout. */
3667 print_symbol_info (enum search_domain kind
,
3668 struct symtab
*s
, struct symbol
*sym
,
3669 int block
, char *last
)
3671 if (last
== NULL
|| filename_cmp (last
, s
->filename
) != 0)
3673 fputs_filtered ("\nFile ", gdb_stdout
);
3674 fputs_filtered (s
->filename
, gdb_stdout
);
3675 fputs_filtered (":\n", gdb_stdout
);
3678 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3679 printf_filtered ("static ");
3681 /* Typedef that is not a C++ class. */
3682 if (kind
== TYPES_DOMAIN
3683 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3684 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3685 /* variable, func, or typedef-that-is-c++-class. */
3686 else if (kind
< TYPES_DOMAIN
3687 || (kind
== TYPES_DOMAIN
3688 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3690 type_print (SYMBOL_TYPE (sym
),
3691 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3692 ? "" : SYMBOL_PRINT_NAME (sym
)),
3695 printf_filtered (";\n");
3699 /* This help function for symtab_symbol_info() prints information
3700 for non-debugging symbols to gdb_stdout. */
3703 print_msymbol_info (struct minimal_symbol
*msymbol
)
3705 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3708 if (gdbarch_addr_bit (gdbarch
) <= 32)
3709 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3710 & (CORE_ADDR
) 0xffffffff,
3713 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3715 printf_filtered ("%s %s\n",
3716 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3719 /* This is the guts of the commands "info functions", "info types", and
3720 "info variables". It calls search_symbols to find all matches and then
3721 print_[m]symbol_info to print out some useful information about the
3725 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3727 static const char * const classnames
[] =
3728 {"variable", "function", "type"};
3729 struct symbol_search
*symbols
;
3730 struct symbol_search
*p
;
3731 struct cleanup
*old_chain
;
3732 char *last_filename
= NULL
;
3735 gdb_assert (kind
<= TYPES_DOMAIN
);
3737 /* Must make sure that if we're interrupted, symbols gets freed. */
3738 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3739 old_chain
= make_cleanup_free_search_symbols (symbols
);
3741 printf_filtered (regexp
3742 ? "All %ss matching regular expression \"%s\":\n"
3743 : "All defined %ss:\n",
3744 classnames
[kind
], regexp
);
3746 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3750 if (p
->msymbol
!= NULL
)
3754 printf_filtered ("\nNon-debugging symbols:\n");
3757 print_msymbol_info (p
->msymbol
);
3761 print_symbol_info (kind
,
3766 last_filename
= p
->symtab
->filename
;
3770 do_cleanups (old_chain
);
3774 variables_info (char *regexp
, int from_tty
)
3776 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3780 functions_info (char *regexp
, int from_tty
)
3782 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3787 types_info (char *regexp
, int from_tty
)
3789 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3792 /* Breakpoint all functions matching regular expression. */
3795 rbreak_command_wrapper (char *regexp
, int from_tty
)
3797 rbreak_command (regexp
, from_tty
);
3800 /* A cleanup function that calls end_rbreak_breakpoints. */
3803 do_end_rbreak_breakpoints (void *ignore
)
3805 end_rbreak_breakpoints ();
3809 rbreak_command (char *regexp
, int from_tty
)
3811 struct symbol_search
*ss
;
3812 struct symbol_search
*p
;
3813 struct cleanup
*old_chain
;
3814 char *string
= NULL
;
3816 char **files
= NULL
, *file_name
;
3821 char *colon
= strchr (regexp
, ':');
3823 if (colon
&& *(colon
+ 1) != ':')
3827 colon_index
= colon
- regexp
;
3828 file_name
= alloca (colon_index
+ 1);
3829 memcpy (file_name
, regexp
, colon_index
);
3830 file_name
[colon_index
--] = 0;
3831 while (isspace (file_name
[colon_index
]))
3832 file_name
[colon_index
--] = 0;
3836 while (isspace (*regexp
)) regexp
++;
3840 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3841 old_chain
= make_cleanup_free_search_symbols (ss
);
3842 make_cleanup (free_current_contents
, &string
);
3844 start_rbreak_breakpoints ();
3845 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3846 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3848 if (p
->msymbol
== NULL
)
3850 int newlen
= (strlen (p
->symtab
->filename
)
3851 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3856 string
= xrealloc (string
, newlen
);
3859 strcpy (string
, p
->symtab
->filename
);
3860 strcat (string
, ":'");
3861 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3862 strcat (string
, "'");
3863 break_command (string
, from_tty
);
3864 print_symbol_info (FUNCTIONS_DOMAIN
,
3868 p
->symtab
->filename
);
3872 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3876 string
= xrealloc (string
, newlen
);
3879 strcpy (string
, "'");
3880 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3881 strcat (string
, "'");
3883 break_command (string
, from_tty
);
3884 printf_filtered ("<function, no debug info> %s;\n",
3885 SYMBOL_PRINT_NAME (p
->msymbol
));
3889 do_cleanups (old_chain
);
3893 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3895 Either sym_text[sym_text_len] != '(' and then we search for any
3896 symbol starting with SYM_TEXT text.
3898 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3899 be terminated at that point. Partial symbol tables do not have parameters
3903 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
3905 int (*ncmp
) (const char *, const char *, size_t);
3907 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3909 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
3912 if (sym_text
[sym_text_len
] == '(')
3914 /* User searches for `name(someth...'. Require NAME to be terminated.
3915 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3916 present but accept even parameters presence. In this case this
3917 function is in fact strcmp_iw but whitespace skipping is not supported
3918 for tab completion. */
3920 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
3927 /* Free any memory associated with a completion list. */
3930 free_completion_list (VEC (char_ptr
) **list_ptr
)
3935 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
3937 VEC_free (char_ptr
, *list_ptr
);
3940 /* Callback for make_cleanup. */
3943 do_free_completion_list (void *list
)
3945 free_completion_list (list
);
3948 /* Helper routine for make_symbol_completion_list. */
3950 static VEC (char_ptr
) *return_val
;
3952 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3953 completion_list_add_name \
3954 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3956 /* Test to see if the symbol specified by SYMNAME (which is already
3957 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3958 characters. If so, add it to the current completion list. */
3961 completion_list_add_name (const char *symname
,
3962 const char *sym_text
, int sym_text_len
,
3963 const char *text
, const char *word
)
3967 /* Clip symbols that cannot match. */
3968 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
3971 /* We have a match for a completion, so add SYMNAME to the current list
3972 of matches. Note that the name is moved to freshly malloc'd space. */
3977 if (word
== sym_text
)
3979 new = xmalloc (strlen (symname
) + 5);
3980 strcpy (new, symname
);
3982 else if (word
> sym_text
)
3984 /* Return some portion of symname. */
3985 new = xmalloc (strlen (symname
) + 5);
3986 strcpy (new, symname
+ (word
- sym_text
));
3990 /* Return some of SYM_TEXT plus symname. */
3991 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3992 strncpy (new, word
, sym_text
- word
);
3993 new[sym_text
- word
] = '\0';
3994 strcat (new, symname
);
3997 VEC_safe_push (char_ptr
, return_val
, new);
4001 /* ObjC: In case we are completing on a selector, look as the msymbol
4002 again and feed all the selectors into the mill. */
4005 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4006 const char *sym_text
, int sym_text_len
,
4007 const char *text
, const char *word
)
4009 static char *tmp
= NULL
;
4010 static unsigned int tmplen
= 0;
4012 const char *method
, *category
, *selector
;
4015 method
= SYMBOL_NATURAL_NAME (msymbol
);
4017 /* Is it a method? */
4018 if ((method
[0] != '-') && (method
[0] != '+'))
4021 if (sym_text
[0] == '[')
4022 /* Complete on shortened method method. */
4023 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4025 while ((strlen (method
) + 1) >= tmplen
)
4031 tmp
= xrealloc (tmp
, tmplen
);
4033 selector
= strchr (method
, ' ');
4034 if (selector
!= NULL
)
4037 category
= strchr (method
, '(');
4039 if ((category
!= NULL
) && (selector
!= NULL
))
4041 memcpy (tmp
, method
, (category
- method
));
4042 tmp
[category
- method
] = ' ';
4043 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4044 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4045 if (sym_text
[0] == '[')
4046 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4049 if (selector
!= NULL
)
4051 /* Complete on selector only. */
4052 strcpy (tmp
, selector
);
4053 tmp2
= strchr (tmp
, ']');
4057 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4061 /* Break the non-quoted text based on the characters which are in
4062 symbols. FIXME: This should probably be language-specific. */
4065 language_search_unquoted_string (char *text
, char *p
)
4067 for (; p
> text
; --p
)
4069 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
4073 if ((current_language
->la_language
== language_objc
))
4075 if (p
[-1] == ':') /* Might be part of a method name. */
4077 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
4078 p
-= 2; /* Beginning of a method name. */
4079 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
4080 { /* Might be part of a method name. */
4083 /* Seeing a ' ' or a '(' is not conclusive evidence
4084 that we are in the middle of a method name. However,
4085 finding "-[" or "+[" should be pretty un-ambiguous.
4086 Unfortunately we have to find it now to decide. */
4089 if (isalnum (t
[-1]) || t
[-1] == '_' ||
4090 t
[-1] == ' ' || t
[-1] == ':' ||
4091 t
[-1] == '(' || t
[-1] == ')')
4096 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
4097 p
= t
- 2; /* Method name detected. */
4098 /* Else we leave with p unchanged. */
4108 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
4109 int sym_text_len
, char *text
, char *word
)
4111 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
4113 struct type
*t
= SYMBOL_TYPE (sym
);
4114 enum type_code c
= TYPE_CODE (t
);
4117 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
4118 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
4119 if (TYPE_FIELD_NAME (t
, j
))
4120 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
4121 sym_text
, sym_text_len
, text
, word
);
4125 /* Type of the user_data argument passed to add_macro_name or
4126 expand_partial_symbol_name. The contents are simply whatever is
4127 needed by completion_list_add_name. */
4128 struct add_name_data
4136 /* A callback used with macro_for_each and macro_for_each_in_scope.
4137 This adds a macro's name to the current completion list. */
4140 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4141 struct macro_source_file
*ignore2
, int ignore3
,
4144 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4146 completion_list_add_name ((char *) name
,
4147 datum
->sym_text
, datum
->sym_text_len
,
4148 datum
->text
, datum
->word
);
4151 /* A callback for expand_partial_symbol_names. */
4154 expand_partial_symbol_name (const char *name
, void *user_data
)
4156 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4158 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4162 default_make_symbol_completion_list_break_on (char *text
, char *word
,
4163 const char *break_on
)
4165 /* Problem: All of the symbols have to be copied because readline
4166 frees them. I'm not going to worry about this; hopefully there
4167 won't be that many. */
4171 struct minimal_symbol
*msymbol
;
4172 struct objfile
*objfile
;
4174 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4175 struct block_iterator iter
;
4176 /* The symbol we are completing on. Points in same buffer as text. */
4178 /* Length of sym_text. */
4180 struct add_name_data datum
;
4181 struct cleanup
*back_to
;
4183 /* Now look for the symbol we are supposed to complete on. */
4187 char *quote_pos
= NULL
;
4189 /* First see if this is a quoted string. */
4191 for (p
= text
; *p
!= '\0'; ++p
)
4193 if (quote_found
!= '\0')
4195 if (*p
== quote_found
)
4196 /* Found close quote. */
4198 else if (*p
== '\\' && p
[1] == quote_found
)
4199 /* A backslash followed by the quote character
4200 doesn't end the string. */
4203 else if (*p
== '\'' || *p
== '"')
4209 if (quote_found
== '\'')
4210 /* A string within single quotes can be a symbol, so complete on it. */
4211 sym_text
= quote_pos
+ 1;
4212 else if (quote_found
== '"')
4213 /* A double-quoted string is never a symbol, nor does it make sense
4214 to complete it any other way. */
4220 /* It is not a quoted string. Break it based on the characters
4221 which are in symbols. */
4224 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4225 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4234 sym_text_len
= strlen (sym_text
);
4236 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4238 if (current_language
->la_language
== language_cplus
4239 || current_language
->la_language
== language_java
4240 || current_language
->la_language
== language_fortran
)
4242 /* These languages may have parameters entered by user but they are never
4243 present in the partial symbol tables. */
4245 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4248 sym_text_len
= cs
- sym_text
;
4250 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4253 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4255 datum
.sym_text
= sym_text
;
4256 datum
.sym_text_len
= sym_text_len
;
4260 /* Look through the partial symtabs for all symbols which begin
4261 by matching SYM_TEXT. Expand all CUs that you find to the list.
4262 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4263 expand_partial_symbol_names (expand_partial_symbol_name
, &datum
);
4265 /* At this point scan through the misc symbol vectors and add each
4266 symbol you find to the list. Eventually we want to ignore
4267 anything that isn't a text symbol (everything else will be
4268 handled by the psymtab code above). */
4270 ALL_MSYMBOLS (objfile
, msymbol
)
4273 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
4275 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
4278 /* Search upwards from currently selected frame (so that we can
4279 complete on local vars). Also catch fields of types defined in
4280 this places which match our text string. Only complete on types
4281 visible from current context. */
4283 b
= get_selected_block (0);
4284 surrounding_static_block
= block_static_block (b
);
4285 surrounding_global_block
= block_global_block (b
);
4286 if (surrounding_static_block
!= NULL
)
4287 while (b
!= surrounding_static_block
)
4291 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4293 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4295 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4299 /* Stop when we encounter an enclosing function. Do not stop for
4300 non-inlined functions - the locals of the enclosing function
4301 are in scope for a nested function. */
4302 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4304 b
= BLOCK_SUPERBLOCK (b
);
4307 /* Add fields from the file's types; symbols will be added below. */
4309 if (surrounding_static_block
!= NULL
)
4310 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4311 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4313 if (surrounding_global_block
!= NULL
)
4314 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4315 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4317 /* Go through the symtabs and check the externs and statics for
4318 symbols which match. */
4320 ALL_PRIMARY_SYMTABS (objfile
, s
)
4323 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4324 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4326 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4330 ALL_PRIMARY_SYMTABS (objfile
, s
)
4333 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4334 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4336 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4340 if (current_language
->la_macro_expansion
== macro_expansion_c
)
4342 struct macro_scope
*scope
;
4344 /* Add any macros visible in the default scope. Note that this
4345 may yield the occasional wrong result, because an expression
4346 might be evaluated in a scope other than the default. For
4347 example, if the user types "break file:line if <TAB>", the
4348 resulting expression will be evaluated at "file:line" -- but
4349 at there does not seem to be a way to detect this at
4351 scope
= default_macro_scope ();
4354 macro_for_each_in_scope (scope
->file
, scope
->line
,
4355 add_macro_name
, &datum
);
4359 /* User-defined macros are always visible. */
4360 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4363 discard_cleanups (back_to
);
4364 return (return_val
);
4368 default_make_symbol_completion_list (char *text
, char *word
)
4370 return default_make_symbol_completion_list_break_on (text
, word
, "");
4373 /* Return a vector of all symbols (regardless of class) which begin by
4374 matching TEXT. If the answer is no symbols, then the return value
4378 make_symbol_completion_list (char *text
, char *word
)
4380 return current_language
->la_make_symbol_completion_list (text
, word
);
4383 /* Like make_symbol_completion_list, but suitable for use as a
4384 completion function. */
4387 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4388 char *text
, char *word
)
4390 return make_symbol_completion_list (text
, word
);
4393 /* Like make_symbol_completion_list, but returns a list of symbols
4394 defined in a source file FILE. */
4397 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
4402 struct block_iterator iter
;
4403 /* The symbol we are completing on. Points in same buffer as text. */
4405 /* Length of sym_text. */
4408 /* Now look for the symbol we are supposed to complete on.
4409 FIXME: This should be language-specific. */
4413 char *quote_pos
= NULL
;
4415 /* First see if this is a quoted string. */
4417 for (p
= text
; *p
!= '\0'; ++p
)
4419 if (quote_found
!= '\0')
4421 if (*p
== quote_found
)
4422 /* Found close quote. */
4424 else if (*p
== '\\' && p
[1] == quote_found
)
4425 /* A backslash followed by the quote character
4426 doesn't end the string. */
4429 else if (*p
== '\'' || *p
== '"')
4435 if (quote_found
== '\'')
4436 /* A string within single quotes can be a symbol, so complete on it. */
4437 sym_text
= quote_pos
+ 1;
4438 else if (quote_found
== '"')
4439 /* A double-quoted string is never a symbol, nor does it make sense
4440 to complete it any other way. */
4446 /* Not a quoted string. */
4447 sym_text
= language_search_unquoted_string (text
, p
);
4451 sym_text_len
= strlen (sym_text
);
4455 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4457 s
= lookup_symtab (srcfile
);
4460 /* Maybe they typed the file with leading directories, while the
4461 symbol tables record only its basename. */
4462 const char *tail
= lbasename (srcfile
);
4465 s
= lookup_symtab (tail
);
4468 /* If we have no symtab for that file, return an empty list. */
4470 return (return_val
);
4472 /* Go through this symtab and check the externs and statics for
4473 symbols which match. */
4475 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4476 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4478 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4481 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4482 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4484 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4487 return (return_val
);
4490 /* A helper function for make_source_files_completion_list. It adds
4491 another file name to a list of possible completions, growing the
4492 list as necessary. */
4495 add_filename_to_list (const char *fname
, char *text
, char *word
,
4496 VEC (char_ptr
) **list
)
4499 size_t fnlen
= strlen (fname
);
4503 /* Return exactly fname. */
4504 new = xmalloc (fnlen
+ 5);
4505 strcpy (new, fname
);
4507 else if (word
> text
)
4509 /* Return some portion of fname. */
4510 new = xmalloc (fnlen
+ 5);
4511 strcpy (new, fname
+ (word
- text
));
4515 /* Return some of TEXT plus fname. */
4516 new = xmalloc (fnlen
+ (text
- word
) + 5);
4517 strncpy (new, word
, text
- word
);
4518 new[text
- word
] = '\0';
4519 strcat (new, fname
);
4521 VEC_safe_push (char_ptr
, *list
, new);
4525 not_interesting_fname (const char *fname
)
4527 static const char *illegal_aliens
[] = {
4528 "_globals_", /* inserted by coff_symtab_read */
4533 for (i
= 0; illegal_aliens
[i
]; i
++)
4535 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4541 /* An object of this type is passed as the user_data argument to
4542 map_partial_symbol_filenames. */
4543 struct add_partial_filename_data
4549 VEC (char_ptr
) **list
;
4552 /* A callback for map_partial_symbol_filenames. */
4555 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4558 struct add_partial_filename_data
*data
= user_data
;
4560 if (not_interesting_fname (filename
))
4562 if (!filename_seen (filename
, 1, data
->first
)
4563 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4565 /* This file matches for a completion; add it to the
4566 current list of matches. */
4567 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
4571 const char *base_name
= lbasename (filename
);
4573 if (base_name
!= filename
4574 && !filename_seen (base_name
, 1, data
->first
)
4575 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4576 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
4580 /* Return a vector of all source files whose names begin with matching
4581 TEXT. The file names are looked up in the symbol tables of this
4582 program. If the answer is no matchess, then the return value is
4586 make_source_files_completion_list (char *text
, char *word
)
4589 struct objfile
*objfile
;
4591 size_t text_len
= strlen (text
);
4592 VEC (char_ptr
) *list
= NULL
;
4593 const char *base_name
;
4594 struct add_partial_filename_data datum
;
4595 struct cleanup
*back_to
;
4597 if (!have_full_symbols () && !have_partial_symbols ())
4600 back_to
= make_cleanup (do_free_completion_list
, &list
);
4602 ALL_SYMTABS (objfile
, s
)
4604 if (not_interesting_fname (s
->filename
))
4606 if (!filename_seen (s
->filename
, 1, &first
)
4607 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4609 /* This file matches for a completion; add it to the current
4611 add_filename_to_list (s
->filename
, text
, word
, &list
);
4615 /* NOTE: We allow the user to type a base name when the
4616 debug info records leading directories, but not the other
4617 way around. This is what subroutines of breakpoint
4618 command do when they parse file names. */
4619 base_name
= lbasename (s
->filename
);
4620 if (base_name
!= s
->filename
4621 && !filename_seen (base_name
, 1, &first
)
4622 && filename_ncmp (base_name
, text
, text_len
) == 0)
4623 add_filename_to_list (base_name
, text
, word
, &list
);
4627 datum
.first
= &first
;
4630 datum
.text_len
= text_len
;
4632 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4633 0 /*need_fullname*/);
4634 discard_cleanups (back_to
);
4639 /* Determine if PC is in the prologue of a function. The prologue is the area
4640 between the first instruction of a function, and the first executable line.
4641 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4643 If non-zero, func_start is where we think the prologue starts, possibly
4644 by previous examination of symbol table information. */
4647 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4649 struct symtab_and_line sal
;
4650 CORE_ADDR func_addr
, func_end
;
4652 /* We have several sources of information we can consult to figure
4654 - Compilers usually emit line number info that marks the prologue
4655 as its own "source line". So the ending address of that "line"
4656 is the end of the prologue. If available, this is the most
4658 - The minimal symbols and partial symbols, which can usually tell
4659 us the starting and ending addresses of a function.
4660 - If we know the function's start address, we can call the
4661 architecture-defined gdbarch_skip_prologue function to analyze the
4662 instruction stream and guess where the prologue ends.
4663 - Our `func_start' argument; if non-zero, this is the caller's
4664 best guess as to the function's entry point. At the time of
4665 this writing, handle_inferior_event doesn't get this right, so
4666 it should be our last resort. */
4668 /* Consult the partial symbol table, to find which function
4670 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4672 CORE_ADDR prologue_end
;
4674 /* We don't even have minsym information, so fall back to using
4675 func_start, if given. */
4677 return 1; /* We *might* be in a prologue. */
4679 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4681 return func_start
<= pc
&& pc
< prologue_end
;
4684 /* If we have line number information for the function, that's
4685 usually pretty reliable. */
4686 sal
= find_pc_line (func_addr
, 0);
4688 /* Now sal describes the source line at the function's entry point,
4689 which (by convention) is the prologue. The end of that "line",
4690 sal.end, is the end of the prologue.
4692 Note that, for functions whose source code is all on a single
4693 line, the line number information doesn't always end up this way.
4694 So we must verify that our purported end-of-prologue address is
4695 *within* the function, not at its start or end. */
4697 || sal
.end
<= func_addr
4698 || func_end
<= sal
.end
)
4700 /* We don't have any good line number info, so use the minsym
4701 information, together with the architecture-specific prologue
4703 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4705 return func_addr
<= pc
&& pc
< prologue_end
;
4708 /* We have line number info, and it looks good. */
4709 return func_addr
<= pc
&& pc
< sal
.end
;
4712 /* Given PC at the function's start address, attempt to find the
4713 prologue end using SAL information. Return zero if the skip fails.
4715 A non-optimized prologue traditionally has one SAL for the function
4716 and a second for the function body. A single line function has
4717 them both pointing at the same line.
4719 An optimized prologue is similar but the prologue may contain
4720 instructions (SALs) from the instruction body. Need to skip those
4721 while not getting into the function body.
4723 The functions end point and an increasing SAL line are used as
4724 indicators of the prologue's endpoint.
4726 This code is based on the function refine_prologue_limit
4730 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4732 struct symtab_and_line prologue_sal
;
4737 /* Get an initial range for the function. */
4738 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4739 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4741 prologue_sal
= find_pc_line (start_pc
, 0);
4742 if (prologue_sal
.line
!= 0)
4744 /* For languages other than assembly, treat two consecutive line
4745 entries at the same address as a zero-instruction prologue.
4746 The GNU assembler emits separate line notes for each instruction
4747 in a multi-instruction macro, but compilers generally will not
4749 if (prologue_sal
.symtab
->language
!= language_asm
)
4751 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4754 /* Skip any earlier lines, and any end-of-sequence marker
4755 from a previous function. */
4756 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4757 || linetable
->item
[idx
].line
== 0)
4760 if (idx
+1 < linetable
->nitems
4761 && linetable
->item
[idx
+1].line
!= 0
4762 && linetable
->item
[idx
+1].pc
== start_pc
)
4766 /* If there is only one sal that covers the entire function,
4767 then it is probably a single line function, like
4769 if (prologue_sal
.end
>= end_pc
)
4772 while (prologue_sal
.end
< end_pc
)
4774 struct symtab_and_line sal
;
4776 sal
= find_pc_line (prologue_sal
.end
, 0);
4779 /* Assume that a consecutive SAL for the same (or larger)
4780 line mark the prologue -> body transition. */
4781 if (sal
.line
>= prologue_sal
.line
)
4784 /* The line number is smaller. Check that it's from the
4785 same function, not something inlined. If it's inlined,
4786 then there is no point comparing the line numbers. */
4787 bl
= block_for_pc (prologue_sal
.end
);
4790 if (block_inlined_p (bl
))
4792 if (BLOCK_FUNCTION (bl
))
4797 bl
= BLOCK_SUPERBLOCK (bl
);
4802 /* The case in which compiler's optimizer/scheduler has
4803 moved instructions into the prologue. We look ahead in
4804 the function looking for address ranges whose
4805 corresponding line number is less the first one that we
4806 found for the function. This is more conservative then
4807 refine_prologue_limit which scans a large number of SALs
4808 looking for any in the prologue. */
4813 if (prologue_sal
.end
< end_pc
)
4814 /* Return the end of this line, or zero if we could not find a
4816 return prologue_sal
.end
;
4818 /* Don't return END_PC, which is past the end of the function. */
4819 return prologue_sal
.pc
;
4822 struct symtabs_and_lines
4823 decode_line_spec (char *string
, int flags
)
4825 struct symtabs_and_lines sals
;
4826 struct symtab_and_line cursal
;
4829 error (_("Empty line specification."));
4831 /* We use whatever is set as the current source line. We do not try
4832 and get a default or it will recursively call us! */
4833 cursal
= get_current_source_symtab_and_line ();
4835 sals
= decode_line_1 (&string
, flags
,
4836 cursal
.symtab
, cursal
.line
);
4839 error (_("Junk at end of line specification: %s"), string
);
4844 static char *name_of_main
;
4845 enum language language_of_main
= language_unknown
;
4848 set_main_name (const char *name
)
4850 if (name_of_main
!= NULL
)
4852 xfree (name_of_main
);
4853 name_of_main
= NULL
;
4854 language_of_main
= language_unknown
;
4858 name_of_main
= xstrdup (name
);
4859 language_of_main
= language_unknown
;
4863 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4867 find_main_name (void)
4869 const char *new_main_name
;
4871 /* Try to see if the main procedure is in Ada. */
4872 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4873 be to add a new method in the language vector, and call this
4874 method for each language until one of them returns a non-empty
4875 name. This would allow us to remove this hard-coded call to
4876 an Ada function. It is not clear that this is a better approach
4877 at this point, because all methods need to be written in a way
4878 such that false positives never be returned. For instance, it is
4879 important that a method does not return a wrong name for the main
4880 procedure if the main procedure is actually written in a different
4881 language. It is easy to guaranty this with Ada, since we use a
4882 special symbol generated only when the main in Ada to find the name
4883 of the main procedure. It is difficult however to see how this can
4884 be guarantied for languages such as C, for instance. This suggests
4885 that order of call for these methods becomes important, which means
4886 a more complicated approach. */
4887 new_main_name
= ada_main_name ();
4888 if (new_main_name
!= NULL
)
4890 set_main_name (new_main_name
);
4894 new_main_name
= go_main_name ();
4895 if (new_main_name
!= NULL
)
4897 set_main_name (new_main_name
);
4901 new_main_name
= pascal_main_name ();
4902 if (new_main_name
!= NULL
)
4904 set_main_name (new_main_name
);
4908 /* The languages above didn't identify the name of the main procedure.
4909 Fallback to "main". */
4910 set_main_name ("main");
4916 if (name_of_main
== NULL
)
4919 return name_of_main
;
4922 /* Handle ``executable_changed'' events for the symtab module. */
4925 symtab_observer_executable_changed (void)
4927 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4928 set_main_name (NULL
);
4931 /* Return 1 if the supplied producer string matches the ARM RealView
4932 compiler (armcc). */
4935 producer_is_realview (const char *producer
)
4937 static const char *const arm_idents
[] = {
4938 "ARM C Compiler, ADS",
4939 "Thumb C Compiler, ADS",
4940 "ARM C++ Compiler, ADS",
4941 "Thumb C++ Compiler, ADS",
4942 "ARM/Thumb C/C++ Compiler, RVCT",
4943 "ARM C/C++ Compiler, RVCT"
4947 if (producer
== NULL
)
4950 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4951 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4958 _initialize_symtab (void)
4960 add_info ("variables", variables_info
, _("\
4961 All global and static variable names, or those matching REGEXP."));
4963 add_com ("whereis", class_info
, variables_info
, _("\
4964 All global and static variable names, or those matching REGEXP."));
4966 add_info ("functions", functions_info
,
4967 _("All function names, or those matching REGEXP."));
4969 /* FIXME: This command has at least the following problems:
4970 1. It prints builtin types (in a very strange and confusing fashion).
4971 2. It doesn't print right, e.g. with
4972 typedef struct foo *FOO
4973 type_print prints "FOO" when we want to make it (in this situation)
4974 print "struct foo *".
4975 I also think "ptype" or "whatis" is more likely to be useful (but if
4976 there is much disagreement "info types" can be fixed). */
4977 add_info ("types", types_info
,
4978 _("All type names, or those matching REGEXP."));
4980 add_info ("sources", sources_info
,
4981 _("Source files in the program."));
4983 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4984 _("Set a breakpoint for all functions matching REGEXP."));
4988 add_com ("lf", class_info
, sources_info
,
4989 _("Source files in the program"));
4990 add_com ("lg", class_info
, variables_info
, _("\
4991 All global and static variable names, or those matching REGEXP."));
4994 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4995 multiple_symbols_modes
, &multiple_symbols_mode
,
4997 Set the debugger behavior when more than one symbol are possible matches\n\
4998 in an expression."), _("\
4999 Show how the debugger handles ambiguities in expressions."), _("\
5000 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5001 NULL
, NULL
, &setlist
, &showlist
);
5003 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
5004 &basenames_may_differ
, _("\
5005 Set whether a source file may have multiple base names."), _("\
5006 Show whether a source file may have multiple base names."), _("\
5007 (A \"base name\" is the name of a file with the directory part removed.\n\
5008 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5009 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5010 before comparing them. Canonicalization is an expensive operation,\n\
5011 but it allows the same file be known by more than one base name.\n\
5012 If not set (the default), all source files are assumed to have just\n\
5013 one base name, and gdb will do file name comparisons more efficiently."),
5015 &setlist
, &showlist
);
5017 observer_attach_executable_changed (symtab_observer_executable_changed
);