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"
37 #include "filenames.h" /* for FILENAME_CMP */
38 #include "objc-lang.h"
47 #include "gdb_obstack.h"
49 #include "dictionary.h"
51 #include <sys/types.h>
53 #include "gdb_string.h"
57 #include "cp-support.h"
59 #include "gdb_assert.h"
62 #include "macroscope.h"
66 /* Prototypes for local functions */
68 static void rbreak_command (char *, int);
70 static void types_info (char *, int);
72 static void functions_info (char *, int);
74 static void variables_info (char *, int);
76 static void sources_info (char *, int);
78 static int find_line_common (struct linetable
*, int, int *, int);
80 static struct symbol
*lookup_symbol_aux (const char *name
,
81 const struct block
*block
,
82 const domain_enum domain
,
83 enum language language
,
84 int *is_a_field_of_this
);
87 struct symbol
*lookup_symbol_aux_local (const char *name
,
88 const struct block
*block
,
89 const domain_enum domain
,
90 enum language language
);
93 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
95 const domain_enum domain
);
98 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
101 const domain_enum domain
);
103 static void print_msymbol_info (struct minimal_symbol
*);
105 void _initialize_symtab (void);
109 /* When non-zero, print debugging messages related to symtab creation. */
110 int symtab_create_debug
= 0;
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 const 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 xsnprintf (buf
, sizeof (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 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
417 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
418 volatile_prefix
, len
);
420 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
421 + strlen (buf
) + len
+ strlen (physname
) + 1);
423 mangled_name
= (char *) xmalloc (mangled_name_len
);
425 mangled_name
[0] = '\0';
427 strcpy (mangled_name
, field_name
);
429 strcat (mangled_name
, buf
);
430 /* If the class doesn't have a name, i.e. newname NULL, then we just
431 mangle it using 0 for the length of the class. Thus it gets mangled
432 as something starting with `::' rather than `classname::'. */
434 strcat (mangled_name
, newname
);
436 strcat (mangled_name
, physname
);
437 return (mangled_name
);
440 /* Initialize the cplus_specific structure. 'cplus_specific' should
441 only be allocated for use with cplus symbols. */
444 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
445 struct objfile
*objfile
)
447 /* A language_specific structure should not have been previously
449 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
450 gdb_assert (objfile
!= NULL
);
452 gsymbol
->language_specific
.cplus_specific
=
453 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
456 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
457 correctly allocated. For C++ symbols a cplus_specific struct is
458 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
459 OBJFILE can be NULL. */
462 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
464 struct objfile
*objfile
)
466 if (gsymbol
->language
== language_cplus
)
468 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
469 symbol_init_cplus_specific (gsymbol
, objfile
);
471 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
474 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
477 /* Return the demangled name of GSYMBOL. */
480 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
482 if (gsymbol
->language
== language_cplus
)
484 if (gsymbol
->language_specific
.cplus_specific
!= NULL
)
485 return gsymbol
->language_specific
.cplus_specific
->demangled_name
;
490 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
494 /* Initialize the language dependent portion of a symbol
495 depending upon the language for the symbol. */
498 symbol_set_language (struct general_symbol_info
*gsymbol
,
499 enum language language
)
501 gsymbol
->language
= language
;
502 if (gsymbol
->language
== language_d
503 || gsymbol
->language
== language_go
504 || gsymbol
->language
== language_java
505 || gsymbol
->language
== language_objc
506 || gsymbol
->language
== language_fortran
)
508 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
510 else if (gsymbol
->language
== language_cplus
)
511 gsymbol
->language_specific
.cplus_specific
= NULL
;
514 memset (&gsymbol
->language_specific
, 0,
515 sizeof (gsymbol
->language_specific
));
519 /* Functions to initialize a symbol's mangled name. */
521 /* Objects of this type are stored in the demangled name hash table. */
522 struct demangled_name_entry
528 /* Hash function for the demangled name hash. */
531 hash_demangled_name_entry (const void *data
)
533 const struct demangled_name_entry
*e
= data
;
535 return htab_hash_string (e
->mangled
);
538 /* Equality function for the demangled name hash. */
541 eq_demangled_name_entry (const void *a
, const void *b
)
543 const struct demangled_name_entry
*da
= a
;
544 const struct demangled_name_entry
*db
= b
;
546 return strcmp (da
->mangled
, db
->mangled
) == 0;
549 /* Create the hash table used for demangled names. Each hash entry is
550 a pair of strings; one for the mangled name and one for the demangled
551 name. The entry is hashed via just the mangled name. */
554 create_demangled_names_hash (struct objfile
*objfile
)
556 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
557 The hash table code will round this up to the next prime number.
558 Choosing a much larger table size wastes memory, and saves only about
559 1% in symbol reading. */
561 objfile
->demangled_names_hash
= htab_create_alloc
562 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
563 NULL
, xcalloc
, xfree
);
566 /* Try to determine the demangled name for a symbol, based on the
567 language of that symbol. If the language is set to language_auto,
568 it will attempt to find any demangling algorithm that works and
569 then set the language appropriately. The returned name is allocated
570 by the demangler and should be xfree'd. */
573 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
576 char *demangled
= NULL
;
578 if (gsymbol
->language
== language_unknown
)
579 gsymbol
->language
= language_auto
;
581 if (gsymbol
->language
== language_objc
582 || gsymbol
->language
== language_auto
)
585 objc_demangle (mangled
, 0);
586 if (demangled
!= NULL
)
588 gsymbol
->language
= language_objc
;
592 if (gsymbol
->language
== language_cplus
593 || gsymbol
->language
== language_auto
)
596 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
597 if (demangled
!= NULL
)
599 gsymbol
->language
= language_cplus
;
603 if (gsymbol
->language
== language_java
)
606 cplus_demangle (mangled
,
607 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
608 if (demangled
!= NULL
)
610 gsymbol
->language
= language_java
;
614 if (gsymbol
->language
== language_d
615 || gsymbol
->language
== language_auto
)
617 demangled
= d_demangle(mangled
, 0);
618 if (demangled
!= NULL
)
620 gsymbol
->language
= language_d
;
624 /* FIXME(dje): Continually adding languages here is clumsy.
625 Better to just call la_demangle if !auto, and if auto then call
626 a utility routine that tries successive languages in turn and reports
627 which one it finds. I realize the la_demangle options may be different
628 for different languages but there's already a FIXME for that. */
629 if (gsymbol
->language
== language_go
630 || gsymbol
->language
== language_auto
)
632 demangled
= go_demangle (mangled
, 0);
633 if (demangled
!= NULL
)
635 gsymbol
->language
= language_go
;
640 /* We could support `gsymbol->language == language_fortran' here to provide
641 module namespaces also for inferiors with only minimal symbol table (ELF
642 symbols). Just the mangling standard is not standardized across compilers
643 and there is no DW_AT_producer available for inferiors with only the ELF
644 symbols to check the mangling kind. */
648 /* Set both the mangled and demangled (if any) names for GSYMBOL based
649 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
650 objfile's obstack; but if COPY_NAME is 0 and if NAME is
651 NUL-terminated, then this function assumes that NAME is already
652 correctly saved (either permanently or with a lifetime tied to the
653 objfile), and it will not be copied.
655 The hash table corresponding to OBJFILE is used, and the memory
656 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
657 so the pointer can be discarded after calling this function. */
659 /* We have to be careful when dealing with Java names: when we run
660 into a Java minimal symbol, we don't know it's a Java symbol, so it
661 gets demangled as a C++ name. This is unfortunate, but there's not
662 much we can do about it: but when demangling partial symbols and
663 regular symbols, we'd better not reuse the wrong demangled name.
664 (See PR gdb/1039.) We solve this by putting a distinctive prefix
665 on Java names when storing them in the hash table. */
667 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
668 don't mind the Java prefix so much: different languages have
669 different demangling requirements, so it's only natural that we
670 need to keep language data around in our demangling cache. But
671 it's not good that the minimal symbol has the wrong demangled name.
672 Unfortunately, I can't think of any easy solution to that
675 #define JAVA_PREFIX "##JAVA$$"
676 #define JAVA_PREFIX_LEN 8
679 symbol_set_names (struct general_symbol_info
*gsymbol
,
680 const char *linkage_name
, int len
, int copy_name
,
681 struct objfile
*objfile
)
683 struct demangled_name_entry
**slot
;
684 /* A 0-terminated copy of the linkage name. */
685 const char *linkage_name_copy
;
686 /* A copy of the linkage name that might have a special Java prefix
687 added to it, for use when looking names up in the hash table. */
688 const char *lookup_name
;
689 /* The length of lookup_name. */
691 struct demangled_name_entry entry
;
693 if (gsymbol
->language
== language_ada
)
695 /* In Ada, we do the symbol lookups using the mangled name, so
696 we can save some space by not storing the demangled name.
698 As a side note, we have also observed some overlap between
699 the C++ mangling and Ada mangling, similarly to what has
700 been observed with Java. Because we don't store the demangled
701 name with the symbol, we don't need to use the same trick
704 gsymbol
->name
= linkage_name
;
707 char *name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
709 memcpy (name
, linkage_name
, len
);
711 gsymbol
->name
= name
;
713 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
718 if (objfile
->demangled_names_hash
== NULL
)
719 create_demangled_names_hash (objfile
);
721 /* The stabs reader generally provides names that are not
722 NUL-terminated; most of the other readers don't do this, so we
723 can just use the given copy, unless we're in the Java case. */
724 if (gsymbol
->language
== language_java
)
728 lookup_len
= len
+ JAVA_PREFIX_LEN
;
729 alloc_name
= alloca (lookup_len
+ 1);
730 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
731 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
732 alloc_name
[lookup_len
] = '\0';
734 lookup_name
= alloc_name
;
735 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
737 else if (linkage_name
[len
] != '\0')
742 alloc_name
= alloca (lookup_len
+ 1);
743 memcpy (alloc_name
, linkage_name
, len
);
744 alloc_name
[lookup_len
] = '\0';
746 lookup_name
= alloc_name
;
747 linkage_name_copy
= alloc_name
;
752 lookup_name
= linkage_name
;
753 linkage_name_copy
= linkage_name
;
756 entry
.mangled
= (char *) lookup_name
;
757 slot
= ((struct demangled_name_entry
**)
758 htab_find_slot (objfile
->demangled_names_hash
,
761 /* If this name is not in the hash table, add it. */
763 /* A C version of the symbol may have already snuck into the table.
764 This happens to, e.g., main.init (__go_init_main). Cope. */
765 || (gsymbol
->language
== language_go
766 && (*slot
)->demangled
[0] == '\0'))
768 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
770 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
772 /* Suppose we have demangled_name==NULL, copy_name==0, and
773 lookup_name==linkage_name. In this case, we already have the
774 mangled name saved, and we don't have a demangled name. So,
775 you might think we could save a little space by not recording
776 this in the hash table at all.
778 It turns out that it is actually important to still save such
779 an entry in the hash table, because storing this name gives
780 us better bcache hit rates for partial symbols. */
781 if (!copy_name
&& lookup_name
== linkage_name
)
783 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
784 offsetof (struct demangled_name_entry
,
786 + demangled_len
+ 1);
787 (*slot
)->mangled
= (char *) lookup_name
;
791 /* If we must copy the mangled name, put it directly after
792 the demangled name so we can have a single
794 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
795 offsetof (struct demangled_name_entry
,
797 + lookup_len
+ demangled_len
+ 2);
798 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
799 strcpy ((*slot
)->mangled
, lookup_name
);
802 if (demangled_name
!= NULL
)
804 strcpy ((*slot
)->demangled
, demangled_name
);
805 xfree (demangled_name
);
808 (*slot
)->demangled
[0] = '\0';
811 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
812 if ((*slot
)->demangled
[0] != '\0')
813 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
815 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
818 /* Return the source code name of a symbol. In languages where
819 demangling is necessary, this is the demangled name. */
822 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
824 switch (gsymbol
->language
)
831 case language_fortran
:
832 if (symbol_get_demangled_name (gsymbol
) != NULL
)
833 return symbol_get_demangled_name (gsymbol
);
836 if (symbol_get_demangled_name (gsymbol
) != NULL
)
837 return symbol_get_demangled_name (gsymbol
);
839 return ada_decode_symbol (gsymbol
);
844 return gsymbol
->name
;
847 /* Return the demangled name for a symbol based on the language for
848 that symbol. If no demangled name exists, return NULL. */
851 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
853 const char *dem_name
= NULL
;
855 switch (gsymbol
->language
)
862 case language_fortran
:
863 dem_name
= symbol_get_demangled_name (gsymbol
);
866 dem_name
= symbol_get_demangled_name (gsymbol
);
867 if (dem_name
== NULL
)
868 dem_name
= ada_decode_symbol (gsymbol
);
876 /* Return the search name of a symbol---generally the demangled or
877 linkage name of the symbol, depending on how it will be searched for.
878 If there is no distinct demangled name, then returns the same value
879 (same pointer) as SYMBOL_LINKAGE_NAME. */
882 symbol_search_name (const struct general_symbol_info
*gsymbol
)
884 if (gsymbol
->language
== language_ada
)
885 return gsymbol
->name
;
887 return symbol_natural_name (gsymbol
);
890 /* Initialize the structure fields to zero values. */
893 init_sal (struct symtab_and_line
*sal
)
901 sal
->explicit_pc
= 0;
902 sal
->explicit_line
= 0;
907 /* Return 1 if the two sections are the same, or if they could
908 plausibly be copies of each other, one in an original object
909 file and another in a separated debug file. */
912 matching_obj_sections (struct obj_section
*obj_first
,
913 struct obj_section
*obj_second
)
915 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
916 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
919 /* If they're the same section, then they match. */
923 /* If either is NULL, give up. */
924 if (first
== NULL
|| second
== NULL
)
927 /* This doesn't apply to absolute symbols. */
928 if (first
->owner
== NULL
|| second
->owner
== NULL
)
931 /* If they're in the same object file, they must be different sections. */
932 if (first
->owner
== second
->owner
)
935 /* Check whether the two sections are potentially corresponding. They must
936 have the same size, address, and name. We can't compare section indexes,
937 which would be more reliable, because some sections may have been
939 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
942 /* In-memory addresses may start at a different offset, relativize them. */
943 if (bfd_get_section_vma (first
->owner
, first
)
944 - bfd_get_start_address (first
->owner
)
945 != bfd_get_section_vma (second
->owner
, second
)
946 - bfd_get_start_address (second
->owner
))
949 if (bfd_get_section_name (first
->owner
, first
) == NULL
950 || bfd_get_section_name (second
->owner
, second
) == NULL
951 || strcmp (bfd_get_section_name (first
->owner
, first
),
952 bfd_get_section_name (second
->owner
, second
)) != 0)
955 /* Otherwise check that they are in corresponding objfiles. */
958 if (obj
->obfd
== first
->owner
)
960 gdb_assert (obj
!= NULL
);
962 if (obj
->separate_debug_objfile
!= NULL
963 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
965 if (obj
->separate_debug_objfile_backlink
!= NULL
966 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
973 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
975 struct objfile
*objfile
;
976 struct minimal_symbol
*msymbol
;
978 /* If we know that this is not a text address, return failure. This is
979 necessary because we loop based on texthigh and textlow, which do
980 not include the data ranges. */
981 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
983 && (MSYMBOL_TYPE (msymbol
) == mst_data
984 || MSYMBOL_TYPE (msymbol
) == mst_bss
985 || MSYMBOL_TYPE (msymbol
) == mst_abs
986 || MSYMBOL_TYPE (msymbol
) == mst_file_data
987 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
990 ALL_OBJFILES (objfile
)
992 struct symtab
*result
= NULL
;
995 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
1004 /* Debug symbols usually don't have section information. We need to dig that
1005 out of the minimal symbols and stash that in the debug symbol. */
1008 fixup_section (struct general_symbol_info
*ginfo
,
1009 CORE_ADDR addr
, struct objfile
*objfile
)
1011 struct minimal_symbol
*msym
;
1013 /* First, check whether a minimal symbol with the same name exists
1014 and points to the same address. The address check is required
1015 e.g. on PowerPC64, where the minimal symbol for a function will
1016 point to the function descriptor, while the debug symbol will
1017 point to the actual function code. */
1018 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1021 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
1022 ginfo
->section
= SYMBOL_SECTION (msym
);
1026 /* Static, function-local variables do appear in the linker
1027 (minimal) symbols, but are frequently given names that won't
1028 be found via lookup_minimal_symbol(). E.g., it has been
1029 observed in frv-uclinux (ELF) executables that a static,
1030 function-local variable named "foo" might appear in the
1031 linker symbols as "foo.6" or "foo.3". Thus, there is no
1032 point in attempting to extend the lookup-by-name mechanism to
1033 handle this case due to the fact that there can be multiple
1036 So, instead, search the section table when lookup by name has
1037 failed. The ``addr'' and ``endaddr'' fields may have already
1038 been relocated. If so, the relocation offset (i.e. the
1039 ANOFFSET value) needs to be subtracted from these values when
1040 performing the comparison. We unconditionally subtract it,
1041 because, when no relocation has been performed, the ANOFFSET
1042 value will simply be zero.
1044 The address of the symbol whose section we're fixing up HAS
1045 NOT BEEN adjusted (relocated) yet. It can't have been since
1046 the section isn't yet known and knowing the section is
1047 necessary in order to add the correct relocation value. In
1048 other words, we wouldn't even be in this function (attempting
1049 to compute the section) if it were already known.
1051 Note that it is possible to search the minimal symbols
1052 (subtracting the relocation value if necessary) to find the
1053 matching minimal symbol, but this is overkill and much less
1054 efficient. It is not necessary to find the matching minimal
1055 symbol, only its section.
1057 Note that this technique (of doing a section table search)
1058 can fail when unrelocated section addresses overlap. For
1059 this reason, we still attempt a lookup by name prior to doing
1060 a search of the section table. */
1062 struct obj_section
*s
;
1064 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1066 int idx
= s
->the_bfd_section
->index
;
1067 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1069 if (obj_section_addr (s
) - offset
<= addr
1070 && addr
< obj_section_endaddr (s
) - offset
)
1072 ginfo
->obj_section
= s
;
1073 ginfo
->section
= idx
;
1081 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1088 if (SYMBOL_OBJ_SECTION (sym
))
1091 /* We either have an OBJFILE, or we can get at it from the sym's
1092 symtab. Anything else is a bug. */
1093 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1095 if (objfile
== NULL
)
1096 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1098 /* We should have an objfile by now. */
1099 gdb_assert (objfile
);
1101 switch (SYMBOL_CLASS (sym
))
1105 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1108 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1112 /* Nothing else will be listed in the minsyms -- no use looking
1117 fixup_section (&sym
->ginfo
, addr
, objfile
);
1122 /* Compute the demangled form of NAME as used by the various symbol
1123 lookup functions. The result is stored in *RESULT_NAME. Returns a
1124 cleanup which can be used to clean up the result.
1126 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1127 Normally, Ada symbol lookups are performed using the encoded name
1128 rather than the demangled name, and so it might seem to make sense
1129 for this function to return an encoded version of NAME.
1130 Unfortunately, we cannot do this, because this function is used in
1131 circumstances where it is not appropriate to try to encode NAME.
1132 For instance, when displaying the frame info, we demangle the name
1133 of each parameter, and then perform a symbol lookup inside our
1134 function using that demangled name. In Ada, certain functions
1135 have internally-generated parameters whose name contain uppercase
1136 characters. Encoding those name would result in those uppercase
1137 characters to become lowercase, and thus cause the symbol lookup
1141 demangle_for_lookup (const char *name
, enum language lang
,
1142 const char **result_name
)
1144 char *demangled_name
= NULL
;
1145 const char *modified_name
= NULL
;
1146 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1148 modified_name
= name
;
1150 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1151 lookup, so we can always binary search. */
1152 if (lang
== language_cplus
)
1154 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1157 modified_name
= demangled_name
;
1158 make_cleanup (xfree
, demangled_name
);
1162 /* If we were given a non-mangled name, canonicalize it
1163 according to the language (so far only for C++). */
1164 demangled_name
= cp_canonicalize_string (name
);
1167 modified_name
= demangled_name
;
1168 make_cleanup (xfree
, demangled_name
);
1172 else if (lang
== language_java
)
1174 demangled_name
= cplus_demangle (name
,
1175 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1178 modified_name
= demangled_name
;
1179 make_cleanup (xfree
, demangled_name
);
1182 else if (lang
== language_d
)
1184 demangled_name
= d_demangle (name
, 0);
1187 modified_name
= demangled_name
;
1188 make_cleanup (xfree
, demangled_name
);
1191 else if (lang
== language_go
)
1193 demangled_name
= go_demangle (name
, 0);
1196 modified_name
= demangled_name
;
1197 make_cleanup (xfree
, demangled_name
);
1201 *result_name
= modified_name
;
1205 /* Find the definition for a specified symbol name NAME
1206 in domain DOMAIN, visible from lexical block BLOCK.
1207 Returns the struct symbol pointer, or zero if no symbol is found.
1208 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1209 NAME is a field of the current implied argument `this'. If so set
1210 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1211 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1212 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1214 /* This function (or rather its subordinates) have a bunch of loops and
1215 it would seem to be attractive to put in some QUIT's (though I'm not really
1216 sure whether it can run long enough to be really important). But there
1217 are a few calls for which it would appear to be bad news to quit
1218 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1219 that there is C++ code below which can error(), but that probably
1220 doesn't affect these calls since they are looking for a known
1221 variable and thus can probably assume it will never hit the C++
1225 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1226 const domain_enum domain
, enum language lang
,
1227 int *is_a_field_of_this
)
1229 const char *modified_name
;
1230 struct symbol
*returnval
;
1231 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1233 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1234 is_a_field_of_this
);
1235 do_cleanups (cleanup
);
1240 /* Behave like lookup_symbol_in_language, but performed with the
1241 current language. */
1244 lookup_symbol (const char *name
, const struct block
*block
,
1245 domain_enum domain
, int *is_a_field_of_this
)
1247 return lookup_symbol_in_language (name
, block
, domain
,
1248 current_language
->la_language
,
1249 is_a_field_of_this
);
1252 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1253 found, or NULL if not found. */
1256 lookup_language_this (const struct language_defn
*lang
,
1257 const struct block
*block
)
1259 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1266 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1269 block_found
= block
;
1272 if (BLOCK_FUNCTION (block
))
1274 block
= BLOCK_SUPERBLOCK (block
);
1280 /* Behave like lookup_symbol except that NAME is the natural name
1281 (e.g., demangled name) of the symbol that we're looking for. */
1283 static struct symbol
*
1284 lookup_symbol_aux (const char *name
, const struct block
*block
,
1285 const domain_enum domain
, enum language language
,
1286 int *is_a_field_of_this
)
1289 const struct language_defn
*langdef
;
1291 /* Make sure we do something sensible with is_a_field_of_this, since
1292 the callers that set this parameter to some non-null value will
1293 certainly use it later and expect it to be either 0 or 1.
1294 If we don't set it, the contents of is_a_field_of_this are
1296 if (is_a_field_of_this
!= NULL
)
1297 *is_a_field_of_this
= 0;
1299 /* Search specified block and its superiors. Don't search
1300 STATIC_BLOCK or GLOBAL_BLOCK. */
1302 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1306 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1307 check to see if NAME is a field of `this'. */
1309 langdef
= language_def (language
);
1311 if (is_a_field_of_this
!= NULL
)
1313 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1317 struct type
*t
= sym
->type
;
1319 /* I'm not really sure that type of this can ever
1320 be typedefed; just be safe. */
1322 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1323 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1324 t
= TYPE_TARGET_TYPE (t
);
1326 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1327 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1328 error (_("Internal error: `%s' is not an aggregate"),
1329 langdef
->la_name_of_this
);
1331 if (check_field (t
, name
))
1333 *is_a_field_of_this
= 1;
1339 /* Now do whatever is appropriate for LANGUAGE to look
1340 up static and global variables. */
1342 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1346 /* Now search all static file-level symbols. Not strictly correct,
1347 but more useful than an error. */
1349 return lookup_static_symbol_aux (name
, domain
);
1352 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1353 first, then check the psymtabs. If a psymtab indicates the existence of the
1354 desired name as a file-level static, then do psymtab-to-symtab conversion on
1355 the fly and return the found symbol. */
1358 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1360 struct objfile
*objfile
;
1363 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1367 ALL_OBJFILES (objfile
)
1369 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1377 /* Check to see if the symbol is defined in BLOCK or its superiors.
1378 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1380 static struct symbol
*
1381 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1382 const domain_enum domain
,
1383 enum language language
)
1386 const struct block
*static_block
= block_static_block (block
);
1387 const char *scope
= block_scope (block
);
1389 /* Check if either no block is specified or it's a global block. */
1391 if (static_block
== NULL
)
1394 while (block
!= static_block
)
1396 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1400 if (language
== language_cplus
|| language
== language_fortran
)
1402 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1408 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1410 block
= BLOCK_SUPERBLOCK (block
);
1413 /* We've reached the edge of the function without finding a result. */
1418 /* Look up OBJFILE to BLOCK. */
1421 lookup_objfile_from_block (const struct block
*block
)
1423 struct objfile
*obj
;
1429 block
= block_global_block (block
);
1430 /* Go through SYMTABS. */
1431 ALL_SYMTABS (obj
, s
)
1432 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1434 if (obj
->separate_debug_objfile_backlink
)
1435 obj
= obj
->separate_debug_objfile_backlink
;
1443 /* Look up a symbol in a block; if found, fixup the symbol, and set
1444 block_found appropriately. */
1447 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1448 const domain_enum domain
)
1452 sym
= lookup_block_symbol (block
, name
, domain
);
1455 block_found
= block
;
1456 return fixup_symbol_section (sym
, NULL
);
1462 /* Check all global symbols in OBJFILE in symtabs and
1466 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1468 const domain_enum domain
)
1470 const struct objfile
*objfile
;
1472 struct blockvector
*bv
;
1473 const struct block
*block
;
1476 for (objfile
= main_objfile
;
1478 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1480 /* Go through symtabs. */
1481 ALL_OBJFILE_PRIMARY_SYMTABS (objfile
, s
)
1483 bv
= BLOCKVECTOR (s
);
1484 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1485 sym
= lookup_block_symbol (block
, name
, domain
);
1488 block_found
= block
;
1489 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1493 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1502 /* Check to see if the symbol is defined in one of the OBJFILE's
1503 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1504 depending on whether or not we want to search global symbols or
1507 static struct symbol
*
1508 lookup_symbol_aux_objfile (struct objfile
*objfile
, int block_index
,
1509 const char *name
, const domain_enum domain
)
1511 struct symbol
*sym
= NULL
;
1512 struct blockvector
*bv
;
1513 const struct block
*block
;
1517 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, block_index
,
1520 ALL_OBJFILE_PRIMARY_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 if 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 /* Cache to watch for file names already seen by filename_seen. */
3109 struct filename_seen_cache
3111 /* Table of files seen so far. */
3113 /* Initial size of the table. It automagically grows from here. */
3114 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
3117 /* filename_seen_cache constructor. */
3119 static struct filename_seen_cache
*
3120 create_filename_seen_cache (void)
3122 struct filename_seen_cache
*cache
;
3124 cache
= XNEW (struct filename_seen_cache
);
3125 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
3126 filename_hash
, filename_eq
,
3127 NULL
, xcalloc
, xfree
);
3132 /* Empty the cache, but do not delete it. */
3135 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
3137 htab_empty (cache
->tab
);
3140 /* filename_seen_cache destructor.
3141 This takes a void * argument as it is generally used as a cleanup. */
3144 delete_filename_seen_cache (void *ptr
)
3146 struct filename_seen_cache
*cache
= ptr
;
3148 htab_delete (cache
->tab
);
3152 /* If FILE is not already in the table of files in CACHE, return zero;
3153 otherwise return non-zero. Optionally add FILE to the table if ADD
3156 NOTE: We don't manage space for FILE, we assume FILE lives as long
3157 as the caller needs. */
3160 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
3164 /* Is FILE in tab? */
3165 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
3169 /* No; maybe add it to tab. */
3171 *slot
= (char *) file
;
3176 /* Data structure to maintain printing state for output_source_filename. */
3178 struct output_source_filename_data
3180 /* Cache of what we've seen so far. */
3181 struct filename_seen_cache
*filename_seen_cache
;
3183 /* Flag of whether we're printing the first one. */
3187 /* Slave routine for sources_info. Force line breaks at ,'s.
3188 NAME is the name to print.
3189 DATA contains the state for printing and watching for duplicates. */
3192 output_source_filename (const char *name
,
3193 struct output_source_filename_data
*data
)
3195 /* Since a single source file can result in several partial symbol
3196 tables, we need to avoid printing it more than once. Note: if
3197 some of the psymtabs are read in and some are not, it gets
3198 printed both under "Source files for which symbols have been
3199 read" and "Source files for which symbols will be read in on
3200 demand". I consider this a reasonable way to deal with the
3201 situation. I'm not sure whether this can also happen for
3202 symtabs; it doesn't hurt to check. */
3204 /* Was NAME already seen? */
3205 if (filename_seen (data
->filename_seen_cache
, name
, 1))
3207 /* Yes; don't print it again. */
3211 /* No; print it and reset *FIRST. */
3213 printf_filtered (", ");
3217 fputs_filtered (name
, gdb_stdout
);
3220 /* A callback for map_partial_symbol_filenames. */
3223 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3226 output_source_filename (fullname
? fullname
: filename
, data
);
3230 sources_info (char *ignore
, int from_tty
)
3233 struct objfile
*objfile
;
3234 struct output_source_filename_data data
;
3235 struct cleanup
*cleanups
;
3237 if (!have_full_symbols () && !have_partial_symbols ())
3239 error (_("No symbol table is loaded. Use the \"file\" command."));
3242 data
.filename_seen_cache
= create_filename_seen_cache ();
3243 cleanups
= make_cleanup (delete_filename_seen_cache
,
3244 data
.filename_seen_cache
);
3246 printf_filtered ("Source files for which symbols have been read in:\n\n");
3249 ALL_SYMTABS (objfile
, s
)
3251 const char *fullname
= symtab_to_fullname (s
);
3253 output_source_filename (fullname
? fullname
: s
->filename
, &data
);
3255 printf_filtered ("\n\n");
3257 printf_filtered ("Source files for which symbols "
3258 "will be read in on demand:\n\n");
3260 clear_filename_seen_cache (data
.filename_seen_cache
);
3262 map_partial_symbol_filenames (output_partial_symbol_filename
, &data
,
3263 1 /*need_fullname*/);
3264 printf_filtered ("\n");
3266 do_cleanups (cleanups
);
3270 file_matches (const char *file
, char *files
[], int nfiles
)
3274 if (file
!= NULL
&& nfiles
!= 0)
3276 for (i
= 0; i
< nfiles
; i
++)
3278 if (filename_cmp (files
[i
], lbasename (file
)) == 0)
3282 else if (nfiles
== 0)
3287 /* Free any memory associated with a search. */
3290 free_search_symbols (struct symbol_search
*symbols
)
3292 struct symbol_search
*p
;
3293 struct symbol_search
*next
;
3295 for (p
= symbols
; p
!= NULL
; p
= next
)
3303 do_free_search_symbols_cleanup (void *symbols
)
3305 free_search_symbols (symbols
);
3309 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
3311 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
3314 /* Helper function for sort_search_symbols and qsort. Can only
3315 sort symbols, not minimal symbols. */
3318 compare_search_syms (const void *sa
, const void *sb
)
3320 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
3321 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
3323 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
3324 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3327 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3328 prevtail where it is, but update its next pointer to point to
3329 the first of the sorted symbols. */
3331 static struct symbol_search
*
3332 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3334 struct symbol_search
**symbols
, *symp
, *old_next
;
3337 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3339 symp
= prevtail
->next
;
3340 for (i
= 0; i
< nfound
; i
++)
3345 /* Generally NULL. */
3348 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3349 compare_search_syms
);
3352 for (i
= 0; i
< nfound
; i
++)
3354 symp
->next
= symbols
[i
];
3357 symp
->next
= old_next
;
3363 /* An object of this type is passed as the user_data to the
3364 expand_symtabs_matching method. */
3365 struct search_symbols_data
3370 /* It is true if PREG contains valid data, false otherwise. */
3371 unsigned preg_p
: 1;
3375 /* A callback for expand_symtabs_matching. */
3378 search_symbols_file_matches (const char *filename
, void *user_data
)
3380 struct search_symbols_data
*data
= user_data
;
3382 return file_matches (filename
, data
->files
, data
->nfiles
);
3385 /* A callback for expand_symtabs_matching. */
3388 search_symbols_name_matches (const char *symname
, void *user_data
)
3390 struct search_symbols_data
*data
= user_data
;
3392 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3395 /* Search the symbol table for matches to the regular expression REGEXP,
3396 returning the results in *MATCHES.
3398 Only symbols of KIND are searched:
3399 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3400 and constants (enums)
3401 FUNCTIONS_DOMAIN - search all functions
3402 TYPES_DOMAIN - search all type names
3403 ALL_DOMAIN - an internal error for this function
3405 free_search_symbols should be called when *MATCHES is no longer needed.
3407 The results are sorted locally; each symtab's global and static blocks are
3408 separately alphabetized. */
3411 search_symbols (char *regexp
, enum search_domain kind
,
3412 int nfiles
, char *files
[],
3413 struct symbol_search
**matches
)
3416 struct blockvector
*bv
;
3419 struct block_iterator iter
;
3421 struct objfile
*objfile
;
3422 struct minimal_symbol
*msymbol
;
3424 static const enum minimal_symbol_type types
[]
3425 = {mst_data
, mst_text
, mst_abs
};
3426 static const enum minimal_symbol_type types2
[]
3427 = {mst_bss
, mst_file_text
, mst_abs
};
3428 static const enum minimal_symbol_type types3
[]
3429 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3430 static const enum minimal_symbol_type types4
[]
3431 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3432 enum minimal_symbol_type ourtype
;
3433 enum minimal_symbol_type ourtype2
;
3434 enum minimal_symbol_type ourtype3
;
3435 enum minimal_symbol_type ourtype4
;
3436 struct symbol_search
*sr
;
3437 struct symbol_search
*psr
;
3438 struct symbol_search
*tail
;
3439 struct search_symbols_data datum
;
3441 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3442 CLEANUP_CHAIN is freed only in the case of an error. */
3443 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3444 struct cleanup
*retval_chain
;
3446 gdb_assert (kind
<= TYPES_DOMAIN
);
3448 ourtype
= types
[kind
];
3449 ourtype2
= types2
[kind
];
3450 ourtype3
= types3
[kind
];
3451 ourtype4
= types4
[kind
];
3453 sr
= *matches
= NULL
;
3459 /* Make sure spacing is right for C++ operators.
3460 This is just a courtesy to make the matching less sensitive
3461 to how many spaces the user leaves between 'operator'
3462 and <TYPENAME> or <OPERATOR>. */
3464 char *opname
= operator_chars (regexp
, &opend
);
3469 int fix
= -1; /* -1 means ok; otherwise number of
3472 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3474 /* There should 1 space between 'operator' and 'TYPENAME'. */
3475 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3480 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3481 if (opname
[-1] == ' ')
3484 /* If wrong number of spaces, fix it. */
3487 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3489 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3494 errcode
= regcomp (&datum
.preg
, regexp
,
3495 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3499 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3501 make_cleanup (xfree
, err
);
3502 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3505 make_regfree_cleanup (&datum
.preg
);
3508 /* Search through the partial symtabs *first* for all symbols
3509 matching the regexp. That way we don't have to reproduce all of
3510 the machinery below. */
3512 datum
.nfiles
= nfiles
;
3513 datum
.files
= files
;
3514 ALL_OBJFILES (objfile
)
3517 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3520 : search_symbols_file_matches
),
3521 search_symbols_name_matches
,
3526 retval_chain
= old_chain
;
3528 /* Here, we search through the minimal symbol tables for functions
3529 and variables that match, and force their symbols to be read.
3530 This is in particular necessary for demangled variable names,
3531 which are no longer put into the partial symbol tables.
3532 The symbol will then be found during the scan of symtabs below.
3534 For functions, find_pc_symtab should succeed if we have debug info
3535 for the function, for variables we have to call
3536 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
3538 If the lookup fails, set found_misc so that we will rescan to print
3539 any matching symbols without debug info.
3540 We only search the objfile the msymbol came from, we no longer search
3541 all objfiles. In large programs (1000s of shared libs) searching all
3542 objfiles is not worth the pain. */
3544 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3546 ALL_MSYMBOLS (objfile
, msymbol
)
3550 if (msymbol
->created_by_gdb
)
3553 if (MSYMBOL_TYPE (msymbol
) == ourtype
3554 || MSYMBOL_TYPE (msymbol
) == ourtype2
3555 || MSYMBOL_TYPE (msymbol
) == ourtype3
3556 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3559 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3562 /* Note: An important side-effect of these lookup functions
3563 is to expand the symbol table if msymbol is found, for the
3564 benefit of the next loop on ALL_PRIMARY_SYMTABS. */
3565 if (kind
== FUNCTIONS_DOMAIN
3566 ? find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
3567 : (lookup_symbol_in_objfile_from_linkage_name
3568 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3576 ALL_PRIMARY_SYMTABS (objfile
, s
)
3578 bv
= BLOCKVECTOR (s
);
3579 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3581 struct symbol_search
*prevtail
= tail
;
3584 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3585 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3587 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3591 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3593 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3595 && ((kind
== VARIABLES_DOMAIN
3596 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3597 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3598 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3599 /* LOC_CONST can be used for more than just enums,
3600 e.g., c++ static const members.
3601 We only want to skip enums here. */
3602 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3603 && TYPE_CODE (SYMBOL_TYPE (sym
))
3605 || (kind
== FUNCTIONS_DOMAIN
3606 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3607 || (kind
== TYPES_DOMAIN
3608 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3611 psr
= (struct symbol_search
*)
3612 xmalloc (sizeof (struct symbol_search
));
3614 psr
->symtab
= real_symtab
;
3616 psr
->msymbol
= NULL
;
3628 if (prevtail
== NULL
)
3630 struct symbol_search dummy
;
3633 tail
= sort_search_symbols (&dummy
, nfound
);
3636 make_cleanup_free_search_symbols (sr
);
3639 tail
= sort_search_symbols (prevtail
, nfound
);
3644 /* If there are no eyes, avoid all contact. I mean, if there are
3645 no debug symbols, then print directly from the msymbol_vector. */
3647 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
3649 ALL_MSYMBOLS (objfile
, msymbol
)
3653 if (msymbol
->created_by_gdb
)
3656 if (MSYMBOL_TYPE (msymbol
) == ourtype
3657 || MSYMBOL_TYPE (msymbol
) == ourtype2
3658 || MSYMBOL_TYPE (msymbol
) == ourtype3
3659 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
3662 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3665 /* For functions we can do a quick check of whether the
3666 symbol might be found via find_pc_symtab. */
3667 if (kind
!= FUNCTIONS_DOMAIN
3668 || find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)) == NULL
)
3670 if (lookup_symbol_in_objfile_from_linkage_name
3671 (objfile
, SYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
3675 psr
= (struct symbol_search
*)
3676 xmalloc (sizeof (struct symbol_search
));
3678 psr
->msymbol
= msymbol
;
3685 make_cleanup_free_search_symbols (sr
);
3697 discard_cleanups (retval_chain
);
3698 do_cleanups (old_chain
);
3702 /* Helper function for symtab_symbol_info, this function uses
3703 the data returned from search_symbols() to print information
3704 regarding the match to gdb_stdout. */
3707 print_symbol_info (enum search_domain kind
,
3708 struct symtab
*s
, struct symbol
*sym
,
3709 int block
, char *last
)
3711 if (last
== NULL
|| filename_cmp (last
, s
->filename
) != 0)
3713 fputs_filtered ("\nFile ", gdb_stdout
);
3714 fputs_filtered (s
->filename
, gdb_stdout
);
3715 fputs_filtered (":\n", gdb_stdout
);
3718 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3719 printf_filtered ("static ");
3721 /* Typedef that is not a C++ class. */
3722 if (kind
== TYPES_DOMAIN
3723 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3724 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3725 /* variable, func, or typedef-that-is-c++-class. */
3726 else if (kind
< TYPES_DOMAIN
3727 || (kind
== TYPES_DOMAIN
3728 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3730 type_print (SYMBOL_TYPE (sym
),
3731 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3732 ? "" : SYMBOL_PRINT_NAME (sym
)),
3735 printf_filtered (";\n");
3739 /* This help function for symtab_symbol_info() prints information
3740 for non-debugging symbols to gdb_stdout. */
3743 print_msymbol_info (struct minimal_symbol
*msymbol
)
3745 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3748 if (gdbarch_addr_bit (gdbarch
) <= 32)
3749 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3750 & (CORE_ADDR
) 0xffffffff,
3753 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3755 printf_filtered ("%s %s\n",
3756 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3759 /* This is the guts of the commands "info functions", "info types", and
3760 "info variables". It calls search_symbols to find all matches and then
3761 print_[m]symbol_info to print out some useful information about the
3765 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3767 static const char * const classnames
[] =
3768 {"variable", "function", "type"};
3769 struct symbol_search
*symbols
;
3770 struct symbol_search
*p
;
3771 struct cleanup
*old_chain
;
3772 char *last_filename
= NULL
;
3775 gdb_assert (kind
<= TYPES_DOMAIN
);
3777 /* Must make sure that if we're interrupted, symbols gets freed. */
3778 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3779 old_chain
= make_cleanup_free_search_symbols (symbols
);
3781 printf_filtered (regexp
3782 ? "All %ss matching regular expression \"%s\":\n"
3783 : "All defined %ss:\n",
3784 classnames
[kind
], regexp
);
3786 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3790 if (p
->msymbol
!= NULL
)
3794 printf_filtered ("\nNon-debugging symbols:\n");
3797 print_msymbol_info (p
->msymbol
);
3801 print_symbol_info (kind
,
3806 last_filename
= p
->symtab
->filename
;
3810 do_cleanups (old_chain
);
3814 variables_info (char *regexp
, int from_tty
)
3816 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3820 functions_info (char *regexp
, int from_tty
)
3822 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3827 types_info (char *regexp
, int from_tty
)
3829 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3832 /* Breakpoint all functions matching regular expression. */
3835 rbreak_command_wrapper (char *regexp
, int from_tty
)
3837 rbreak_command (regexp
, from_tty
);
3840 /* A cleanup function that calls end_rbreak_breakpoints. */
3843 do_end_rbreak_breakpoints (void *ignore
)
3845 end_rbreak_breakpoints ();
3849 rbreak_command (char *regexp
, int from_tty
)
3851 struct symbol_search
*ss
;
3852 struct symbol_search
*p
;
3853 struct cleanup
*old_chain
;
3854 char *string
= NULL
;
3856 char **files
= NULL
, *file_name
;
3861 char *colon
= strchr (regexp
, ':');
3863 if (colon
&& *(colon
+ 1) != ':')
3867 colon_index
= colon
- regexp
;
3868 file_name
= alloca (colon_index
+ 1);
3869 memcpy (file_name
, regexp
, colon_index
);
3870 file_name
[colon_index
--] = 0;
3871 while (isspace (file_name
[colon_index
]))
3872 file_name
[colon_index
--] = 0;
3876 while (isspace (*regexp
)) regexp
++;
3880 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3881 old_chain
= make_cleanup_free_search_symbols (ss
);
3882 make_cleanup (free_current_contents
, &string
);
3884 start_rbreak_breakpoints ();
3885 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3886 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3888 if (p
->msymbol
== NULL
)
3890 int newlen
= (strlen (p
->symtab
->filename
)
3891 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3896 string
= xrealloc (string
, newlen
);
3899 strcpy (string
, p
->symtab
->filename
);
3900 strcat (string
, ":'");
3901 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3902 strcat (string
, "'");
3903 break_command (string
, from_tty
);
3904 print_symbol_info (FUNCTIONS_DOMAIN
,
3908 p
->symtab
->filename
);
3912 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3916 string
= xrealloc (string
, newlen
);
3919 strcpy (string
, "'");
3920 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3921 strcat (string
, "'");
3923 break_command (string
, from_tty
);
3924 printf_filtered ("<function, no debug info> %s;\n",
3925 SYMBOL_PRINT_NAME (p
->msymbol
));
3929 do_cleanups (old_chain
);
3933 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3935 Either sym_text[sym_text_len] != '(' and then we search for any
3936 symbol starting with SYM_TEXT text.
3938 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3939 be terminated at that point. Partial symbol tables do not have parameters
3943 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
3945 int (*ncmp
) (const char *, const char *, size_t);
3947 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3949 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
3952 if (sym_text
[sym_text_len
] == '(')
3954 /* User searches for `name(someth...'. Require NAME to be terminated.
3955 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3956 present but accept even parameters presence. In this case this
3957 function is in fact strcmp_iw but whitespace skipping is not supported
3958 for tab completion. */
3960 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
3967 /* Free any memory associated with a completion list. */
3970 free_completion_list (VEC (char_ptr
) **list_ptr
)
3975 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
3977 VEC_free (char_ptr
, *list_ptr
);
3980 /* Callback for make_cleanup. */
3983 do_free_completion_list (void *list
)
3985 free_completion_list (list
);
3988 /* Helper routine for make_symbol_completion_list. */
3990 static VEC (char_ptr
) *return_val
;
3992 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3993 completion_list_add_name \
3994 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3996 /* Test to see if the symbol specified by SYMNAME (which is already
3997 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3998 characters. If so, add it to the current completion list. */
4001 completion_list_add_name (const char *symname
,
4002 const char *sym_text
, int sym_text_len
,
4003 const char *text
, const char *word
)
4007 /* Clip symbols that cannot match. */
4008 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4011 /* We have a match for a completion, so add SYMNAME to the current list
4012 of matches. Note that the name is moved to freshly malloc'd space. */
4017 if (word
== sym_text
)
4019 new = xmalloc (strlen (symname
) + 5);
4020 strcpy (new, symname
);
4022 else if (word
> sym_text
)
4024 /* Return some portion of symname. */
4025 new = xmalloc (strlen (symname
) + 5);
4026 strcpy (new, symname
+ (word
- sym_text
));
4030 /* Return some of SYM_TEXT plus symname. */
4031 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
4032 strncpy (new, word
, sym_text
- word
);
4033 new[sym_text
- word
] = '\0';
4034 strcat (new, symname
);
4037 VEC_safe_push (char_ptr
, return_val
, new);
4041 /* ObjC: In case we are completing on a selector, look as the msymbol
4042 again and feed all the selectors into the mill. */
4045 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
4046 const char *sym_text
, int sym_text_len
,
4047 const char *text
, const char *word
)
4049 static char *tmp
= NULL
;
4050 static unsigned int tmplen
= 0;
4052 const char *method
, *category
, *selector
;
4055 method
= SYMBOL_NATURAL_NAME (msymbol
);
4057 /* Is it a method? */
4058 if ((method
[0] != '-') && (method
[0] != '+'))
4061 if (sym_text
[0] == '[')
4062 /* Complete on shortened method method. */
4063 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
4065 while ((strlen (method
) + 1) >= tmplen
)
4071 tmp
= xrealloc (tmp
, tmplen
);
4073 selector
= strchr (method
, ' ');
4074 if (selector
!= NULL
)
4077 category
= strchr (method
, '(');
4079 if ((category
!= NULL
) && (selector
!= NULL
))
4081 memcpy (tmp
, method
, (category
- method
));
4082 tmp
[category
- method
] = ' ';
4083 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
4084 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4085 if (sym_text
[0] == '[')
4086 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
4089 if (selector
!= NULL
)
4091 /* Complete on selector only. */
4092 strcpy (tmp
, selector
);
4093 tmp2
= strchr (tmp
, ']');
4097 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
4101 /* Break the non-quoted text based on the characters which are in
4102 symbols. FIXME: This should probably be language-specific. */
4105 language_search_unquoted_string (char *text
, char *p
)
4107 for (; p
> text
; --p
)
4109 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
4113 if ((current_language
->la_language
== language_objc
))
4115 if (p
[-1] == ':') /* Might be part of a method name. */
4117 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
4118 p
-= 2; /* Beginning of a method name. */
4119 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
4120 { /* Might be part of a method name. */
4123 /* Seeing a ' ' or a '(' is not conclusive evidence
4124 that we are in the middle of a method name. However,
4125 finding "-[" or "+[" should be pretty un-ambiguous.
4126 Unfortunately we have to find it now to decide. */
4129 if (isalnum (t
[-1]) || t
[-1] == '_' ||
4130 t
[-1] == ' ' || t
[-1] == ':' ||
4131 t
[-1] == '(' || t
[-1] == ')')
4136 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
4137 p
= t
- 2; /* Method name detected. */
4138 /* Else we leave with p unchanged. */
4148 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
4149 int sym_text_len
, char *text
, char *word
)
4151 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
4153 struct type
*t
= SYMBOL_TYPE (sym
);
4154 enum type_code c
= TYPE_CODE (t
);
4157 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
4158 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
4159 if (TYPE_FIELD_NAME (t
, j
))
4160 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
4161 sym_text
, sym_text_len
, text
, word
);
4165 /* Type of the user_data argument passed to add_macro_name or
4166 expand_partial_symbol_name. The contents are simply whatever is
4167 needed by completion_list_add_name. */
4168 struct add_name_data
4176 /* A callback used with macro_for_each and macro_for_each_in_scope.
4177 This adds a macro's name to the current completion list. */
4180 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4181 struct macro_source_file
*ignore2
, int ignore3
,
4184 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4186 completion_list_add_name ((char *) name
,
4187 datum
->sym_text
, datum
->sym_text_len
,
4188 datum
->text
, datum
->word
);
4191 /* A callback for expand_partial_symbol_names. */
4194 expand_partial_symbol_name (const char *name
, void *user_data
)
4196 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4198 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4202 default_make_symbol_completion_list_break_on (char *text
, char *word
,
4203 const char *break_on
)
4205 /* Problem: All of the symbols have to be copied because readline
4206 frees them. I'm not going to worry about this; hopefully there
4207 won't be that many. */
4211 struct minimal_symbol
*msymbol
;
4212 struct objfile
*objfile
;
4214 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4215 struct block_iterator iter
;
4216 /* The symbol we are completing on. Points in same buffer as text. */
4218 /* Length of sym_text. */
4220 struct add_name_data datum
;
4221 struct cleanup
*back_to
;
4223 /* Now look for the symbol we are supposed to complete on. */
4227 char *quote_pos
= NULL
;
4229 /* First see if this is a quoted string. */
4231 for (p
= text
; *p
!= '\0'; ++p
)
4233 if (quote_found
!= '\0')
4235 if (*p
== quote_found
)
4236 /* Found close quote. */
4238 else if (*p
== '\\' && p
[1] == quote_found
)
4239 /* A backslash followed by the quote character
4240 doesn't end the string. */
4243 else if (*p
== '\'' || *p
== '"')
4249 if (quote_found
== '\'')
4250 /* A string within single quotes can be a symbol, so complete on it. */
4251 sym_text
= quote_pos
+ 1;
4252 else if (quote_found
== '"')
4253 /* A double-quoted string is never a symbol, nor does it make sense
4254 to complete it any other way. */
4260 /* It is not a quoted string. Break it based on the characters
4261 which are in symbols. */
4264 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4265 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4274 sym_text_len
= strlen (sym_text
);
4276 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4278 if (current_language
->la_language
== language_cplus
4279 || current_language
->la_language
== language_java
4280 || current_language
->la_language
== language_fortran
)
4282 /* These languages may have parameters entered by user but they are never
4283 present in the partial symbol tables. */
4285 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4288 sym_text_len
= cs
- sym_text
;
4290 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4293 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4295 datum
.sym_text
= sym_text
;
4296 datum
.sym_text_len
= sym_text_len
;
4300 /* Look through the partial symtabs for all symbols which begin
4301 by matching SYM_TEXT. Expand all CUs that you find to the list.
4302 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4303 expand_partial_symbol_names (expand_partial_symbol_name
, &datum
);
4305 /* At this point scan through the misc symbol vectors and add each
4306 symbol you find to the list. Eventually we want to ignore
4307 anything that isn't a text symbol (everything else will be
4308 handled by the psymtab code above). */
4310 ALL_MSYMBOLS (objfile
, msymbol
)
4313 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
4315 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
4318 /* Search upwards from currently selected frame (so that we can
4319 complete on local vars). Also catch fields of types defined in
4320 this places which match our text string. Only complete on types
4321 visible from current context. */
4323 b
= get_selected_block (0);
4324 surrounding_static_block
= block_static_block (b
);
4325 surrounding_global_block
= block_global_block (b
);
4326 if (surrounding_static_block
!= NULL
)
4327 while (b
!= surrounding_static_block
)
4331 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4333 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4335 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4339 /* Stop when we encounter an enclosing function. Do not stop for
4340 non-inlined functions - the locals of the enclosing function
4341 are in scope for a nested function. */
4342 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4344 b
= BLOCK_SUPERBLOCK (b
);
4347 /* Add fields from the file's types; symbols will be added below. */
4349 if (surrounding_static_block
!= NULL
)
4350 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4351 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4353 if (surrounding_global_block
!= NULL
)
4354 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4355 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4357 /* Go through the symtabs and check the externs and statics for
4358 symbols which match. */
4360 ALL_PRIMARY_SYMTABS (objfile
, s
)
4363 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4364 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4366 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4370 ALL_PRIMARY_SYMTABS (objfile
, s
)
4373 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4374 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4376 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4380 if (current_language
->la_macro_expansion
== macro_expansion_c
)
4382 struct macro_scope
*scope
;
4384 /* Add any macros visible in the default scope. Note that this
4385 may yield the occasional wrong result, because an expression
4386 might be evaluated in a scope other than the default. For
4387 example, if the user types "break file:line if <TAB>", the
4388 resulting expression will be evaluated at "file:line" -- but
4389 at there does not seem to be a way to detect this at
4391 scope
= default_macro_scope ();
4394 macro_for_each_in_scope (scope
->file
, scope
->line
,
4395 add_macro_name
, &datum
);
4399 /* User-defined macros are always visible. */
4400 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4403 discard_cleanups (back_to
);
4404 return (return_val
);
4408 default_make_symbol_completion_list (char *text
, char *word
)
4410 return default_make_symbol_completion_list_break_on (text
, word
, "");
4413 /* Return a vector of all symbols (regardless of class) which begin by
4414 matching TEXT. If the answer is no symbols, then the return value
4418 make_symbol_completion_list (char *text
, char *word
)
4420 return current_language
->la_make_symbol_completion_list (text
, word
);
4423 /* Like make_symbol_completion_list, but suitable for use as a
4424 completion function. */
4427 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4428 char *text
, char *word
)
4430 return make_symbol_completion_list (text
, word
);
4433 /* Like make_symbol_completion_list, but returns a list of symbols
4434 defined in a source file FILE. */
4437 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
4442 struct block_iterator iter
;
4443 /* The symbol we are completing on. Points in same buffer as text. */
4445 /* Length of sym_text. */
4448 /* Now look for the symbol we are supposed to complete on.
4449 FIXME: This should be language-specific. */
4453 char *quote_pos
= NULL
;
4455 /* First see if this is a quoted string. */
4457 for (p
= text
; *p
!= '\0'; ++p
)
4459 if (quote_found
!= '\0')
4461 if (*p
== quote_found
)
4462 /* Found close quote. */
4464 else if (*p
== '\\' && p
[1] == quote_found
)
4465 /* A backslash followed by the quote character
4466 doesn't end the string. */
4469 else if (*p
== '\'' || *p
== '"')
4475 if (quote_found
== '\'')
4476 /* A string within single quotes can be a symbol, so complete on it. */
4477 sym_text
= quote_pos
+ 1;
4478 else if (quote_found
== '"')
4479 /* A double-quoted string is never a symbol, nor does it make sense
4480 to complete it any other way. */
4486 /* Not a quoted string. */
4487 sym_text
= language_search_unquoted_string (text
, p
);
4491 sym_text_len
= strlen (sym_text
);
4495 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4497 s
= lookup_symtab (srcfile
);
4500 /* Maybe they typed the file with leading directories, while the
4501 symbol tables record only its basename. */
4502 const char *tail
= lbasename (srcfile
);
4505 s
= lookup_symtab (tail
);
4508 /* If we have no symtab for that file, return an empty list. */
4510 return (return_val
);
4512 /* Go through this symtab and check the externs and statics for
4513 symbols which match. */
4515 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4516 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4518 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4521 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4522 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4524 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4527 return (return_val
);
4530 /* A helper function for make_source_files_completion_list. It adds
4531 another file name to a list of possible completions, growing the
4532 list as necessary. */
4535 add_filename_to_list (const char *fname
, char *text
, char *word
,
4536 VEC (char_ptr
) **list
)
4539 size_t fnlen
= strlen (fname
);
4543 /* Return exactly fname. */
4544 new = xmalloc (fnlen
+ 5);
4545 strcpy (new, fname
);
4547 else if (word
> text
)
4549 /* Return some portion of fname. */
4550 new = xmalloc (fnlen
+ 5);
4551 strcpy (new, fname
+ (word
- text
));
4555 /* Return some of TEXT plus fname. */
4556 new = xmalloc (fnlen
+ (text
- word
) + 5);
4557 strncpy (new, word
, text
- word
);
4558 new[text
- word
] = '\0';
4559 strcat (new, fname
);
4561 VEC_safe_push (char_ptr
, *list
, new);
4565 not_interesting_fname (const char *fname
)
4567 static const char *illegal_aliens
[] = {
4568 "_globals_", /* inserted by coff_symtab_read */
4573 for (i
= 0; illegal_aliens
[i
]; i
++)
4575 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4581 /* An object of this type is passed as the user_data argument to
4582 map_partial_symbol_filenames. */
4583 struct add_partial_filename_data
4585 struct filename_seen_cache
*filename_seen_cache
;
4589 VEC (char_ptr
) **list
;
4592 /* A callback for map_partial_symbol_filenames. */
4595 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4598 struct add_partial_filename_data
*data
= user_data
;
4600 if (not_interesting_fname (filename
))
4602 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
4603 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4605 /* This file matches for a completion; add it to the
4606 current list of matches. */
4607 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
4611 const char *base_name
= lbasename (filename
);
4613 if (base_name
!= filename
4614 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
4615 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4616 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
4620 /* Return a vector of all source files whose names begin with matching
4621 TEXT. The file names are looked up in the symbol tables of this
4622 program. If the answer is no matchess, then the return value is
4626 make_source_files_completion_list (char *text
, char *word
)
4629 struct objfile
*objfile
;
4630 size_t text_len
= strlen (text
);
4631 VEC (char_ptr
) *list
= NULL
;
4632 const char *base_name
;
4633 struct add_partial_filename_data datum
;
4634 struct filename_seen_cache
*filename_seen_cache
;
4635 struct cleanup
*back_to
, *cache_cleanup
;
4637 if (!have_full_symbols () && !have_partial_symbols ())
4640 back_to
= make_cleanup (do_free_completion_list
, &list
);
4642 filename_seen_cache
= create_filename_seen_cache ();
4643 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
4644 filename_seen_cache
);
4646 ALL_SYMTABS (objfile
, s
)
4648 if (not_interesting_fname (s
->filename
))
4650 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
4651 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4653 /* This file matches for a completion; add it to the current
4655 add_filename_to_list (s
->filename
, text
, word
, &list
);
4659 /* NOTE: We allow the user to type a base name when the
4660 debug info records leading directories, but not the other
4661 way around. This is what subroutines of breakpoint
4662 command do when they parse file names. */
4663 base_name
= lbasename (s
->filename
);
4664 if (base_name
!= s
->filename
4665 && !filename_seen (filename_seen_cache
, base_name
, 1)
4666 && filename_ncmp (base_name
, text
, text_len
) == 0)
4667 add_filename_to_list (base_name
, text
, word
, &list
);
4671 datum
.filename_seen_cache
= filename_seen_cache
;
4674 datum
.text_len
= text_len
;
4676 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4677 0 /*need_fullname*/);
4679 do_cleanups (cache_cleanup
);
4680 discard_cleanups (back_to
);
4685 /* Determine if PC is in the prologue of a function. The prologue is the area
4686 between the first instruction of a function, and the first executable line.
4687 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4689 If non-zero, func_start is where we think the prologue starts, possibly
4690 by previous examination of symbol table information. */
4693 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4695 struct symtab_and_line sal
;
4696 CORE_ADDR func_addr
, func_end
;
4698 /* We have several sources of information we can consult to figure
4700 - Compilers usually emit line number info that marks the prologue
4701 as its own "source line". So the ending address of that "line"
4702 is the end of the prologue. If available, this is the most
4704 - The minimal symbols and partial symbols, which can usually tell
4705 us the starting and ending addresses of a function.
4706 - If we know the function's start address, we can call the
4707 architecture-defined gdbarch_skip_prologue function to analyze the
4708 instruction stream and guess where the prologue ends.
4709 - Our `func_start' argument; if non-zero, this is the caller's
4710 best guess as to the function's entry point. At the time of
4711 this writing, handle_inferior_event doesn't get this right, so
4712 it should be our last resort. */
4714 /* Consult the partial symbol table, to find which function
4716 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4718 CORE_ADDR prologue_end
;
4720 /* We don't even have minsym information, so fall back to using
4721 func_start, if given. */
4723 return 1; /* We *might* be in a prologue. */
4725 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4727 return func_start
<= pc
&& pc
< prologue_end
;
4730 /* If we have line number information for the function, that's
4731 usually pretty reliable. */
4732 sal
= find_pc_line (func_addr
, 0);
4734 /* Now sal describes the source line at the function's entry point,
4735 which (by convention) is the prologue. The end of that "line",
4736 sal.end, is the end of the prologue.
4738 Note that, for functions whose source code is all on a single
4739 line, the line number information doesn't always end up this way.
4740 So we must verify that our purported end-of-prologue address is
4741 *within* the function, not at its start or end. */
4743 || sal
.end
<= func_addr
4744 || func_end
<= sal
.end
)
4746 /* We don't have any good line number info, so use the minsym
4747 information, together with the architecture-specific prologue
4749 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4751 return func_addr
<= pc
&& pc
< prologue_end
;
4754 /* We have line number info, and it looks good. */
4755 return func_addr
<= pc
&& pc
< sal
.end
;
4758 /* Given PC at the function's start address, attempt to find the
4759 prologue end using SAL information. Return zero if the skip fails.
4761 A non-optimized prologue traditionally has one SAL for the function
4762 and a second for the function body. A single line function has
4763 them both pointing at the same line.
4765 An optimized prologue is similar but the prologue may contain
4766 instructions (SALs) from the instruction body. Need to skip those
4767 while not getting into the function body.
4769 The functions end point and an increasing SAL line are used as
4770 indicators of the prologue's endpoint.
4772 This code is based on the function refine_prologue_limit
4776 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4778 struct symtab_and_line prologue_sal
;
4783 /* Get an initial range for the function. */
4784 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4785 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4787 prologue_sal
= find_pc_line (start_pc
, 0);
4788 if (prologue_sal
.line
!= 0)
4790 /* For languages other than assembly, treat two consecutive line
4791 entries at the same address as a zero-instruction prologue.
4792 The GNU assembler emits separate line notes for each instruction
4793 in a multi-instruction macro, but compilers generally will not
4795 if (prologue_sal
.symtab
->language
!= language_asm
)
4797 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4800 /* Skip any earlier lines, and any end-of-sequence marker
4801 from a previous function. */
4802 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4803 || linetable
->item
[idx
].line
== 0)
4806 if (idx
+1 < linetable
->nitems
4807 && linetable
->item
[idx
+1].line
!= 0
4808 && linetable
->item
[idx
+1].pc
== start_pc
)
4812 /* If there is only one sal that covers the entire function,
4813 then it is probably a single line function, like
4815 if (prologue_sal
.end
>= end_pc
)
4818 while (prologue_sal
.end
< end_pc
)
4820 struct symtab_and_line sal
;
4822 sal
= find_pc_line (prologue_sal
.end
, 0);
4825 /* Assume that a consecutive SAL for the same (or larger)
4826 line mark the prologue -> body transition. */
4827 if (sal
.line
>= prologue_sal
.line
)
4830 /* The line number is smaller. Check that it's from the
4831 same function, not something inlined. If it's inlined,
4832 then there is no point comparing the line numbers. */
4833 bl
= block_for_pc (prologue_sal
.end
);
4836 if (block_inlined_p (bl
))
4838 if (BLOCK_FUNCTION (bl
))
4843 bl
= BLOCK_SUPERBLOCK (bl
);
4848 /* The case in which compiler's optimizer/scheduler has
4849 moved instructions into the prologue. We look ahead in
4850 the function looking for address ranges whose
4851 corresponding line number is less the first one that we
4852 found for the function. This is more conservative then
4853 refine_prologue_limit which scans a large number of SALs
4854 looking for any in the prologue. */
4859 if (prologue_sal
.end
< end_pc
)
4860 /* Return the end of this line, or zero if we could not find a
4862 return prologue_sal
.end
;
4864 /* Don't return END_PC, which is past the end of the function. */
4865 return prologue_sal
.pc
;
4869 static char *name_of_main
;
4870 enum language language_of_main
= language_unknown
;
4873 set_main_name (const char *name
)
4875 if (name_of_main
!= NULL
)
4877 xfree (name_of_main
);
4878 name_of_main
= NULL
;
4879 language_of_main
= language_unknown
;
4883 name_of_main
= xstrdup (name
);
4884 language_of_main
= language_unknown
;
4888 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4892 find_main_name (void)
4894 const char *new_main_name
;
4896 /* Try to see if the main procedure is in Ada. */
4897 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4898 be to add a new method in the language vector, and call this
4899 method for each language until one of them returns a non-empty
4900 name. This would allow us to remove this hard-coded call to
4901 an Ada function. It is not clear that this is a better approach
4902 at this point, because all methods need to be written in a way
4903 such that false positives never be returned. For instance, it is
4904 important that a method does not return a wrong name for the main
4905 procedure if the main procedure is actually written in a different
4906 language. It is easy to guaranty this with Ada, since we use a
4907 special symbol generated only when the main in Ada to find the name
4908 of the main procedure. It is difficult however to see how this can
4909 be guarantied for languages such as C, for instance. This suggests
4910 that order of call for these methods becomes important, which means
4911 a more complicated approach. */
4912 new_main_name
= ada_main_name ();
4913 if (new_main_name
!= NULL
)
4915 set_main_name (new_main_name
);
4919 new_main_name
= go_main_name ();
4920 if (new_main_name
!= NULL
)
4922 set_main_name (new_main_name
);
4926 new_main_name
= pascal_main_name ();
4927 if (new_main_name
!= NULL
)
4929 set_main_name (new_main_name
);
4933 /* The languages above didn't identify the name of the main procedure.
4934 Fallback to "main". */
4935 set_main_name ("main");
4941 if (name_of_main
== NULL
)
4944 return name_of_main
;
4947 /* Handle ``executable_changed'' events for the symtab module. */
4950 symtab_observer_executable_changed (void)
4952 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4953 set_main_name (NULL
);
4956 /* Return 1 if the supplied producer string matches the ARM RealView
4957 compiler (armcc). */
4960 producer_is_realview (const char *producer
)
4962 static const char *const arm_idents
[] = {
4963 "ARM C Compiler, ADS",
4964 "Thumb C Compiler, ADS",
4965 "ARM C++ Compiler, ADS",
4966 "Thumb C++ Compiler, ADS",
4967 "ARM/Thumb C/C++ Compiler, RVCT",
4968 "ARM C/C++ Compiler, RVCT"
4972 if (producer
== NULL
)
4975 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4976 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4983 _initialize_symtab (void)
4985 add_info ("variables", variables_info
, _("\
4986 All global and static variable names, or those matching REGEXP."));
4988 add_com ("whereis", class_info
, variables_info
, _("\
4989 All global and static variable names, or those matching REGEXP."));
4991 add_info ("functions", functions_info
,
4992 _("All function names, or those matching REGEXP."));
4994 /* FIXME: This command has at least the following problems:
4995 1. It prints builtin types (in a very strange and confusing fashion).
4996 2. It doesn't print right, e.g. with
4997 typedef struct foo *FOO
4998 type_print prints "FOO" when we want to make it (in this situation)
4999 print "struct foo *".
5000 I also think "ptype" or "whatis" is more likely to be useful (but if
5001 there is much disagreement "info types" can be fixed). */
5002 add_info ("types", types_info
,
5003 _("All type names, or those matching REGEXP."));
5005 add_info ("sources", sources_info
,
5006 _("Source files in the program."));
5008 add_com ("rbreak", class_breakpoint
, rbreak_command
,
5009 _("Set a breakpoint for all functions matching REGEXP."));
5013 add_com ("lf", class_info
, sources_info
,
5014 _("Source files in the program"));
5015 add_com ("lg", class_info
, variables_info
, _("\
5016 All global and static variable names, or those matching REGEXP."));
5019 add_setshow_enum_cmd ("multiple-symbols", no_class
,
5020 multiple_symbols_modes
, &multiple_symbols_mode
,
5022 Set the debugger behavior when more than one symbol are possible matches\n\
5023 in an expression."), _("\
5024 Show how the debugger handles ambiguities in expressions."), _("\
5025 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
5026 NULL
, NULL
, &setlist
, &showlist
);
5028 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
5029 &basenames_may_differ
, _("\
5030 Set whether a source file may have multiple base names."), _("\
5031 Show whether a source file may have multiple base names."), _("\
5032 (A \"base name\" is the name of a file with the directory part removed.\n\
5033 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
5034 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
5035 before comparing them. Canonicalization is an expensive operation,\n\
5036 but it allows the same file be known by more than one base name.\n\
5037 If not set (the default), all source files are assumed to have just\n\
5038 one base name, and gdb will do file name comparisons more efficiently."),
5040 &setlist
, &showlist
);
5042 add_setshow_boolean_cmd ("symtab-create", no_class
, &symtab_create_debug
,
5043 _("Set debugging of symbol table creation."),
5044 _("Show debugging of symbol table creation."), _("\
5045 When enabled, debugging messages are printed when building symbol tables."),
5048 &setdebuglist
, &showdebuglist
);
5050 observer_attach_executable_changed (symtab_observer_executable_changed
);